JPS6337658Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a drainage device of a cooling device mainly used for cooling a refrigerator.

The drainage device of this type of cooling device is required to have the following functions in addition to the original drainage function. That is, from a sanitary perspective, it is required to prevent insects from entering the refrigerator through the drainage system. Further, in the case of a cooling device that forces air inside the refrigerator to pass through the cooler, negative pressure or positive pressure is applied to the drainage device depending on the position of the opening on the interior side of the drainage device. When negative pressure is applied, outside air is sucked into the warehouse through the drainage device. Also, when positive pressure is applied, the cold air inside the refrigerator is pushed out of the refrigerator,
In either case, the cooling load increases. Furthermore, when the temperature inside the refrigerator is controlled, as the temperature inside the refrigerator decreases, the pressure inside the refrigerator decreases and outside air is sucked out of the refrigerator, and when the temperature inside the refrigerator rises, the pressure inside the refrigerator increases and the air inside the refrigerator decreases. This causes an increase in the cooling load as described above. In particular, when outside air enters, moisture in the outside air may freeze in the drain pipe 11, clogging the drain pipe or causing abnormal frost formation on the cooler. Therefore, the drainage device is required to be able to prevent the movement of air inside and outside the refrigerator. In order to meet these requirements, conventionally, a U-shaped trap 21 has been provided at the end of the drain pipe 11 or in the middle of the drain pipe 11, as shown in FIG. However, this conventional drainage device had the following drawbacks. If the inner diameter of the drain pipe 11 is small and the slope of the horizontally drawn portion is insufficient, a puddle will form in the horizontally drawn portion filling the interior of the drain pipe 11 due to the surface tension of the water. In this state, air is trapped between the liquid reservoir and the U-shaped trap 21, so the flow of drain becomes very poor, causing drain to overflow from the drain pan 9, or if the temperature inside the refrigerator is below 0°C. There was a drawback when the drain in drain pan 9 froze.
Furthermore, when the horizontally drawn portion of the drain pipe 11 is wavy, water accumulates in the wavy portion, causing the same inconvenience as described above. When the drain pan 9 freezes, the capacity of the drain pan 9 to hold the drain decreases, so the drain flowing down from the cooler 5 may overflow during the next defrosting, or it may freeze one after another and the ice becomes thicker, eventually blocking the cooler blower. It may obstruct the rotation of the blades.

This invention was made in view of the above-mentioned circumstances, and aims to provide a drainage device for a cooling device that prevents the invasion of insects and the movement of air inside and outside the refrigerator, and has excellent drainage performance.

An embodiment of this invention will be described below. Second
In the figures and FIG. 3, 1 is a refrigerator, and 2 is a cooling device installed on the ceiling of the refrigerator 1. 3 is a compressor, 4 is a condenser, and 5 is a cooler, which are sequentially communicated through refrigerant piping (not shown),
Forming a well-known refrigeration cycle and cooling device 2
is incorporated into. 6 and 7 are blowers for the condenser 4 and cooler 5, respectively; 8 is a cooler chamber that forms an air path for the cooler 5 and prevents heat from entering from outside the refrigerator; 9
1 is a drain pan that receives drain flowing down from the cooler 5, and 10 is a blow-off duct that prevents the cold air shot cycle. 11 is a drainage device, 12 is its main body, 13 is a first drain pipe that communicates between the drain pan 9 and the main body 12, and 14 is a second drain pipe that has one end opening into the main body 12 and the other end opening into a drain groove to be described later. It is. The drainage device 11 will be explained in detail with reference to FIG. In FIG. 4, 15 is a cavity inside the main body 12, and 16 is a water reservoir in the lower part of the cavity 15. 17 is cavity 15
This is an air vent hole that communicates with the outside and is located at the same height as the lowest bottom surface 9-1 of the drain pan 9. 13-1 is an inlet of the first drain pipe 13, 13-2 is an outlet of the first drain pipe 13,
The inlet 13 - 1 opens at the bottom of the drain pan 9 , and the outlet 13 - 2 opens into the water reservoir 16 . 14-1 is the inlet of the second drain pipe 14;
It penetrates the wall 19 of the main body 12 at a position lower than the main body 12 penetration part 18 of the first drain pipe 13 and higher than the outlet 13 - 2 of the first drain pipe 13 and opens into the cavity 15 . 20 is a drain port, 30 is a water inlet provided on the upper surface of the main body 12, and 31 is a cap detachably attached to the water inlet 30. Next, the action will be explained. The cooling operation of the cooling device 2 causes the cooling of the cooler 5.
During this cooling operation, the frost adhering to the cooler 5 is melted by the heating action of a defrosting device (not shown), and becomes drain and flows down to the drain pan 9. Drain received by the drain pan 9 flows to the lowest bottom surface 9-1 of the drain pan 9, passes through the first drain pipe 13 from the inlet 13-1, reaches the water reservoir 16, and further flows to the inlet 14-1.
1 to the second drain pipe 14 and is discharged to the drain groove 20 from the outlet 14-2. When defrosting is finished,
Drain no longer flows from the drain pan 9, and the original cooling operation is performed with the drain finally accumulated in the water reservoir 16 up to the lowest level of the inlet 14-1. Therefore, during cooling operation, the outlet 13-
2 is immersed in the drain collected in the water reservoir 16, so that insects are prevented from entering the refrigerator and air is prevented from moving inside and outside the refrigerator. Furthermore, if a puddle that fills the inside of the pipe occurs in the horizontal part due to the relationship between the inner diameter of the second drain pipe 14 and the slope of the horizontal part, the air upstream of this puddle is discharged from the air vent hole 17. Ru. At the same time, the air downstream of the water puddle is discharged from the outlet 14-2, so that no air puddle occurs as in the conventional case, and the flow of the water is good. Furthermore, since the position of the air vent hole 17 is at the same height as the lowest part of the drain pan 9-1, if the second drain pipe 14 is on a reverse slope or is wavy, the drain will not drain normally. Even if the drain remains in the drain pan 9, it is discharged from the air vent hole 17. Therefore, the drain will not remain in the drain pan 9 and freeze during the next cooling operation, and water leakage from the air vent hole 17 will not notify the operation manager that there is a problem with the drain device 11. can. Note that this effect is similarly exhibited even when the second drain pipe 14 is clogged with dirt or the like during operation.

In addition, when the construction of the drainage device 11 is completed, remove the cap 31 and inject water from the water inlet 30, and check the flow of water to see if there are any problems such as the second drain pipe 14 being on a reverse slope. can be easily checked,
The inside of the main body 12 can also be cleaned. And in normal times,
Since the water inlet 30 is covered by the cap 31, dust does not enter into the main body 12 from the water inlet 30.

In the above embodiment, the air vent hole 17 is located in the main body 1.
2, but the second drain pipe 1
4 or the cap 31.

As described above, according to this invention, a water reservoir is formed inside the main body to seal the first drain pipe, which prevents insects from entering and air moving inside and outside the refrigerator through the drainage device. . Moreover, even if the drain pipe is undulated, air is removed through the air vent hole, allowing smooth draining and no drain remaining in the drain pan. In addition, after construction, you can check the flow of the drain by pouring water from the water inlet.
Furthermore, since the inside of the main body can be cleaned from the water inlet, it is possible to prevent the drainage system from becoming clogged with dirt over time.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a conventional drainage device of a cooling device, and FIGS. 2 to 4 show an embodiment of this invention.
FIG. 2 is an explanatory diagram of the drainage device, FIG. 3 is a sectional view taken along the line - in FIG. 2, and FIG. 4 is a detailed view of the main parts of the drainage device. In the figure, 1 is a refrigerator, 2 is a cooling device, 9 is a drain pan, 11 is a drainage device, 12 is a main body, 13 is a first
Drainage, 14 is the second drain pipe, 17 is the air vent hole, 3
0 is a water inlet, and 31 is a cap. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A drain pan receives the drain flowing down from the cooler installed in the cooler room, and the drain is discharged outside the cooler room through a drain pipe, and the inside is hollow and the water inlet is provided on the top surface. a first drain pipe that penetrates a wall of the main body to communicate the drain pan and the cavity of the main body and opens into the cavity at a position lower than the wall penetration part; and the first drain pipe. a second drain pipe opening into the cavity of the main body at a position lower than the wall penetration part of the pipe and higher than the opening of the first drain pipe, a detachable cap for closing the water inlet, and the main body or Second
A drainage device for a cooling system comprising an air vent provided in a drain pipe or cap.