JP2002062019A - Condensing unit draw-out type refrigeration system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive condensing unit draw-out type refrigeration system in which the refrigeration capacity does not lower. SOLUTION: The part between a dryer 14 and an expansion valve 15 of refrigerant piping 12 between a condenser 7 and an evaporator 10 is laid on top of refrigerant piping 13 between the evaporator 10 and a compressor 9 to form a heat exchanging section 16. Since a loop part 17 standing on a unit base plate 3 on the side of a condensing unit base plate 5 is formed at the heat exchanging section 16, diameter of the loop part 17 can be decreased with respect to the draw-out distance of the condensing unit base plate 5 as compared with a case where the loop part 17 is formed in the rear of a condensing unit 6. Since heat is exchanged at the loop part 17, no extra piping for heat exchange is required and the cost can be reduced because total piping length can be shortened. Since the refrigerant piping 12, 13 is coated with a thermal insulation material 23, heat exchanging efficiency is not lowered at the heat exchanging section 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for pulling out a condensing unit.

[0002]

2. Description of the Related Art A coil-shaped winding portion is provided in each refrigerant pipe connecting between a condenser and an evaporator of a refrigeration cycle and between the evaporator and a compressor, so that a cooling device or a condensing unit is drawn out. The showcase is disclosed in JP-A-7-190.
No. 591 and JP-A-10-170128.

[0003]

However, in any case, a large coil-shaped winding portion is provided in the refrigerant pipe behind the cooling device or the condensing unit. Separately, since a pipe for the heat exchange part is required, the entire pipe becomes longer, the pressure loss in the refrigeration circuit increases, and the refrigeration capacity decreases. In addition, as the piping lengthens, material costs and processing costs increase,
The amount of gas to be charged increases and the cost increases. The present invention has been made to solve the above problems, and an object of the present invention is to provide a condensing unit drawer-type cooling device that is inexpensive and does not reduce the refrigerating capacity.

[0004]

According to the first aspect of the present invention, there is provided a drawer-type condensing unit cooling apparatus according to the present invention, wherein a guide rail is laid on a base.
In a condensing unit draw-out type cooling device in which a condensing unit base plate on which a compressor, a condenser and the like of a refrigeration cycle are mounted can be guided by the guide rail and can be drawn out, the condensing unit drawer-type cooling device includes: The refrigerant exchange pipes connecting the evaporator and the compressor are overlapped to form a heat exchange section, and the heat exchange section is provided with a loop section.

According to a second aspect of the present invention, in the condensing unit draw-out type cooling device according to the first aspect of the present invention, one of both ends of the loop portion is attached to the condensing unit base plate. The condensing unit is fixed to the base, and the condensing unit base plate can be extended only when the condensing unit base plate is pulled out.

[0006]

According to the condensing unit draw-out type cooling device of the first aspect, the heat exchange in which the refrigerant pipes connecting the condenser and the evaporator and connecting the evaporator and the compressor are overlapped. A loop section is provided in the section, and heat is exchanged in the loop section. Since heat is exchanged in the loop portion, there is no need to provide a separate pipe for heat exchange, and the length of the entire pipe can be reduced, which can contribute to cost reduction. In addition, as the pipe length becomes shorter, the pressure loss is reduced, and the refrigeration capacity can be increased.

According to the condensing unit draw-out type cooling device of the second aspect, one of the two ends of the loop portion is fixed to the condensing unit base plate and the other is fixed to the base. When the unit base plate is pulled out, only the loop portion having both ends fixed is extended. Therefore, the pulling-out operation and the pushing-in operation of the condensing unit can be performed smoothly.

[0008]

Embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a plan view of a condensing unit draw-out type cooling device (hereinafter simply referred to as a cooling device) 1, FIG. 2 is a plan view showing a state in which a condensing unit base plate 5 is pulled out, and FIG. 3 is a condensing unit base plate. 5, FIG. 4 is a perspective view of a loop section 17 formed in the heat exchange section 16, and FIG. 5 is a side sectional view of a refrigerator 31 in which the cooling device 1 is installed on an upper surface.

A unit base plate 3 is fixed to an upper surface of a base 2 of the cooling device 1. The unit base plate 3 is provided with a pair of left and right guide rails 4 so that the condensing unit base plate 5 can be guided by the guide rails 4 and pulled out to the near side. The guide rail 4 is formed by bending a rising piece 4b vertically from an installation piece 4a installed on the unit base plate 3, and bending a horizontal guide piece 4c on the rising piece 4b. The front end of the rising piece 4b is bent outward at a right angle to form a fixed piece 4d.
Is formed with a screw hole 4e (see FIGS. 1 to 3).

As shown in FIG. 3, the condensing unit base plate 5 is formed by bending the front and rear and left and right ends of the rectangular mounting surface 5a downward. Then, the bent pieces 5b and 5c in the front-rear direction are respectively extended to the left and right sides,
The contact pieces 5d and 5e are formed. In the contact piece 5e,
A screw insertion hole 5f is formed. On the mounting surface 5a of the condensing unit base plate 5, a condenser 7, a cooling fan 8,
A compressor 9 is provided. An evaporator 10 is provided on the lower surface of the base 2.

The condenser 7 and the compressor 9 are connected by a refrigerant pipe 11, the condenser 7 and the evaporator 10 are connected by a refrigerant pipe 12, and the evaporator 10 and the compressor 9 are connected by a refrigerant pipe 13
Connected by The dryer 1 is connected to the refrigerant pipe 12.
4 and an expansion valve 15 are interposed. A portion of the refrigerant pipe 12 between the dryer 14 and the expansion valve 15 is overlapped with the refrigerant pipe 13 to form a heat exchange section 16.

As shown in FIG. 4, the heat exchange section 16 is formed with a loop section 17 standing on the unit base plate 3 on the side of the condensing unit base plate 5. In the loop portion 17, the refrigerant pipe 12 and the refrigerant pipe 13 are soldered. Vertical portions 18 and 19 are formed at both ends of the loop portion 17. And the vertical part 1
Horizontal fixing portions 20 and 21 are formed continuously from 8 and 19. The refrigerant pipes 12 and 13 include a portion where the refrigerant pipes 12 and 13 overlap each other.
The heat insulating material 23 is covered. The horizontal fixing portion 20 is fixed to the condensing unit base plate 5 by a fixing bracket 22, and the horizontal fixing portion 21 is similarly fixed to the unit base plate 3 by a fixing bracket 22.

The cooling device 1 having the above-described structure includes a unit base plate 3
When the condensing unit base plate 5 guided by the guide rails 4 disposed on the
The contact piece 5d extending on both left and right sides of the guide rail 4
Abuts on the rear end of the rising piece 4b, and serves as a stopper in the pull-out direction. When the condensing unit base plate 5 is pushed in, the abutting pieces 5e extending on both left and right sides of the front bent piece 5c abut against the fixing piece 4d formed at the front end of the rising piece 4b of the guide rail 4. In contact, it acts as a stopper in the pushing direction.

At the pushing position, the fixing screw 5g inserted into the screw insertion hole 5f of the contact piece 5e is screwed into the screw hole 4e of the fixing piece 4d, and the unit base plate 3 and the condensing unit base plate 5 Can be tightened. Further, since the contact piece 5d serves as a stopper in the pulling-out direction, even if the cooling device 1 is placed on a unit placed above the refrigerator 31 as shown in FIG. Is safe because it does not come off the base plate 3 and fall from the base 2.

The portion of the refrigerant pipe 12 between the condenser 7 and the evaporator 10 which is substantially between the dryer 14 and the expansion valve 15 is overlapped with the refrigerant pipe 13 between the evaporator 10 and the compressor 9 to form a heat exchange section. The heat exchange part 16 includes a unit base plate 3 on the side of the condensing unit base plate 5.
Since the loop portion 17 raised above is formed, the diameter of the loop portion 17 is larger than the diameter of the loop portion 17 with respect to the drawing distance of the condensing unit base plate 5 than when the loop portion 17 is formed behind the condensing unit 6. Can be smaller,
The piping length can be shortened. Further, since heat is exchanged in the loop portion 17, there is no need to provide a separate pipe for heat exchange, and the length of the entire pipe can be shortened, which can contribute to cost reduction. Further, since the refrigerant pipe 12 and the refrigerant pipe 13 are covered with the heat insulating material 23, the heat exchange efficiency in the heat exchange unit 16 does not decrease.

Further, since the horizontal fixing portions 20 and 21 at both ends of the loop portion 17 are fixed to the condensing unit base plate 5 and the unit base plate 3 by fixing members 22, respectively, the condensing unit base plate is provided. When pulling out or pushing in 5, only the loop portion 17 expands and contracts. Therefore, the pulling-out operation and the pushing-in operation of the condensing unit base plate 5 can be performed smoothly. in this case,
In the loop portion 17, since the refrigerant pipe 12 and the refrigerant pipe 13 are soldered and covered with the heat insulating material 23, heat exchange occurs when the condensing unit base plate 5 is pulled out or pushed in. The refrigerant pipe 12 and the refrigerant pipe 13 of the loop portion 17 are not separated.

The cooling device 1 can be applied not only to a refrigerator but also to a freezer, a refrigerator / freezer showcase, and the like.

[Brief description of the drawings]

FIG. 1 is a plan view of a cooling device.

FIG. 2 is a plan view showing a state in which a base plate for a condensing unit is pulled out.

FIG. 3 is a perspective view of a guide rail and a base plate for a condensing unit.

FIG. 4 is a perspective view of a loop formed in the heat exchange unit.

FIG. 5 is a side sectional view of a refrigerator in which a cooling device is installed on an upper surface.

[Explanation of symbols]

 1. Cooling device 2. Base 3. Unit base plate 4. Guide rail 5. Base plate for condensing unit 5b, 5c ... Bending pieces 5d, 5e ... Contact piece 6 ... Condensing unit 7 ... Condenser 9 ... Compressor 10 ... Evaporator 11,12,13 ... Refrigerant pipe 16 ... Heat exchange unit 17 ... Loop Part 20, 21 ... Horizontal fixing part 22 ... Fixing bracket

Claims (2)

[Claims] 1. A condensing unit in which a guide rail is laid on a base, and a condensing unit base plate on which a compressor, a condenser and the like of a refrigeration cycle are mounted is guided by the guide rail and can be pulled out. In the drawer-type cooling device, a heat exchange unit is configured by overlapping each refrigerant pipe connecting the condenser and the evaporator and between the evaporator and the compressor, and a loop unit is provided in the heat exchange unit. Condensing unit drawer type cooling device characterized by the above-mentioned. 2. When the condensing unit base plate is pulled out, one of the two end portions of the loop portion is fixed to the condensing unit base plate and the other is fixed to the base. The drawer-type cooling device according to claim 1, wherein only the portion can be extended.