JPS6317972Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to coolers such as freezers, refrigerators, and case cases.

There are two types of coolers: a pipe-in-sheet type and a pipe-on-sheet type, and the pipe-on-sheet type is constructed as shown in FIGS. 1 and 2. That is, the cooler casing 1 is formed by bending a plate made of a good thermal conductor, and the pipe 2 forming the refrigerant passage is adhered to the outer peripheral surface of the cooler casing 1. The refrigerant passages are arranged in a meandering manner along the surface of the cooler housing with the pipe 2 perpendicular to the axis of the cooler housing 1, and an even number of vertical passages, upward flow passages, and downward flow passages are connected on the side of the cooler housing 1. A semicircular arc-shaped passage is arranged.
The inlet of the pipe 2 is connected to a discharge port of the compressor via a connecting pipe 3 and a capillary tube 4, and the outlet thereof is connected to a suction port via a suction pipe 5.

Since the refrigerant is in a gas-liquid two-phase flow within the pipe 2, there is a movement in which the gas phase pushes up the liquid phase in the upward flow path, and a movement in which the liquid phase descends according to gravity. As a result, gas-liquid two-phase mixing and agitation occurs in the upward flow passage, producing refrigerant flow noise.

The present invention was developed based on the above-mentioned circumstances, and provides a low-noise cooler with less refrigerant flow noise.

Hereinafter, the present invention will be explained in detail with reference to the drawings. In FIG. 3, the cooler casing 6 is constructed by bending a plate made of a material with good heat conductivity into a U-shape. 6
A meandering passage 7 ends on the other side of the lower surface plate 6c via b.
a, a straight passage 7b that starts from the end of the meandering passage on the lower plate 6c and spans the lower plate 6c, side plate 6b, and upper plate 6a; a passage parallel to the horizontal passage that continues with this straight passage 7b and reaches the meandering passage starting edge 11; 7c, which constitutes a refrigerant passage, is adhesively bonded to the outer surface of the cooler casing 6.

The starting end of the meandering path is an inlet A, which is connected to the compressor discharge port via a connecting pipe 8 and a capillary tube 9. The end of the passage 7c (the end of the passage) serves as an outlet B and is connected to the suction port via a suction pipe 10.

In the cooler with the above configuration, only the portion on the side wall of the straight passage 7b serves as the upward flow passage, and its length is only the height of the side plate 6b, and its position is minimized. Since most of the refrigerant is vaporized near the outlet B, mixing and agitation of gas and liquid is difficult to occur and there is little refrigerant flow noise.

As is clear from the above, the configuration of this invention provides the following effects.

(a) There are few upward flow passages, resulting in a low-noise cooler.

(b) When manufacturing coolers, the plates constituting one cooler case are formed one after the other, rather than one cooler at a time, pipes for refrigerant passages are joined to each of these plates, and then each plate is assembled. Separate each cooler,
Each is bent and formed, but if the refrigerant inlet and outlet are close to each other, it becomes easier to process the ends.

(c) During manufacturing, the pipe is filled with gas and sealed, and this gas filling is also convenient because it can be introduced from the adjacent inlet and outlet.

(d) The cooling system has an accumulator that stores refrigerant. When the compressor is started, the suction side temporarily becomes vacuum, but if the accumulator is placed as downstream as possible, in other words, as close to the compressor suction port, the time when the compressor runs dry due to vacuum can be shortened. This is convenient in terms of system characteristics and efficiency. For this reason, the accumulator is placed at the outlet of the passage. In this case, if the outlet part is placed on the bottom plate of the cooler case and the accumulator is placed at the bottom, when the compressor stops, the refrigerant will accumulate in areas other than the accumulator, causing problems.
If it is placed at the top, all the refrigerant will collect in the accumulator when it is stopped. For this reason, it is convenient for the outlet section to be located on the top plate in relation to the accumulator.

(e) During manufacturing, both the inlet and outlet parts are joined to the top plate, so even after bending and forming, the inlet and outlet parts remain on the top plate without being separated, and the above effects can be fully achieved. can be demonstrated.

(f) The efficiency of the cooler is high because there is a straight passage spanning the bottom plate, side plate, and top plate, and a passage leading to the meandering passage starting edge of the top plate.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional example, FIG. 2 is a sectional view of a main part thereof, and FIG. 3 is a perspective view of an embodiment of the present invention. 6... Cooler case, 7... Pipe, 7a... Meandering passage, 7b... Straight passage, A... Inlet part (meandering passage start end), B... Outlet end (passage end).

Claims (1)

[Scope of utility model registration request] A cooler consisting of a cooler case made of plates made of a material with good thermal conductivity and consisting of a top plate, a bottom plate, and a side plate, and a pipe that is joined to the outer surface of the cooler case and forms a refrigerant passage. The refrigerant passage includes a meandering passage starting from the top plate of the cooler case, passing through the side plate and ending at the bottom plate, and a straight passage extending from the end of the meandering passage to the bottom plate, side plate, and top plate. and a passage leading to the starting edge of the meandering passage on the top plate, with the starting end of the meandering passage serving as an inlet for refrigerant and the end of the passage serving as an outlet.