JPS5813266Y2 - cooler device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cooler device in a refrigeration system or the like.

Generally, in such a cooling system, a refrigerator compartment in which items to be refrigerated are stored and a cooler compartment are connected in series, and the cooler compartment is equipped with a cooler containing a refrigerant flow pipe for cooling the inside of the refrigerator compartment. A circulating air passage is formed between the refrigerating room and the cooler room, and a motor-driven fan is disposed within this air passage.
The air cooled in the cooler room is sent to the refrigerator compartment, and the air in the refrigerator compartment is introduced into the cooler room for circulation and cooling.

In this cooler device, during cooling operation, moisture in the air condenses (frosts) on the surfaces of the heat exchange parts such as the refrigerant flow pipes and fin plates of the cooler, and a layer of frost forms over time. Develops thickly.

This layer of frost significantly reduces the cooling efficiency of the air, so it is necessary to remove this frost (defrost).

How to finish this frosting efficiently and within a short time is one of the most important issues for refrigeration equipment.
This is a very important function.

Conventionally, in order to achieve frosting, various means and devices have been employed to heat and melt the frost.

However, in conventional cooler devices, the defrost I
・There is a drawback that the effect of the means cannot be used effectively enough.

For example, in a cooling system configured to perform defrost while the refrigerator compartment and cooler compartment are in communication, low-temperature air from the refrigerator compartment may flow into the cooler compartment during defrost heating even when the fan is stopped. Therefore, the heat for defrosting is wasted, so the defrosting efficiency is low, and the warm air in the cooler room naturally flows into the refrigerator compartment, which increases the temperature in the refrigerator compartment, which should always be kept at a low temperature.

Furthermore, in order to improve this problem, a cooling device having a mechanism for cutting off the communication between the cooler room and the refrigerating room has been proposed, but the operation and the blocking state of the cutting mechanism are incomplete or insufficient. However, it has a complicated structure, requires a large amount of space, and has many practical disadvantages, such as imposing a large economic burden on the equipment.

The present invention eliminates the above-mentioned drawbacks and provides a cooler device that is reliable in operation, can completely shield the cooler chamber, and can therefore achieve defrost with a defrost mechanism with extremely high efficiency. be.

Embodiments of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIGS. 1 and 2, a cooler chamber is provided with an air inlet 4 and an air outlet 5 at both ends by an upper bottom wall 1, a lower bottom wall 2 which also serves as a dew pan, and an opposing side wall 3. A plurality of coolers 7 are disposed within the cooler chamber 6, and an exhaust fan 8 is provided at the air outlet 5.

9 is a drainage port formed in the lower bottom wall 2.

The upper bottom wall 1 and the lower bottom wall 2 are respectively formed with an upper protruding edge 10 and a lower protruding edge 11 which protrude outward from the entire outer periphery so as to face each other, and are made of non-breathable curtain material. A shielding curtain 12 which is entirely cylindrical and expandable and retractable in its axial direction,
Its upper end edge is airtightly connected to the lower surface of the upper projecting edge 10 so that its axis is in the vertical direction, and the lower end edge of this shielding curtain 12 can be closely attached to the upper surface of the lower projecting edge 11. The heavy frame bodies 13 are airtightly connected.

Further, a motor (or a motor with a speed reducer) 14 is disposed on the upper bottom wall 1, and four take-up rollers 15, for example, are fixedly mounted on the drive shaft of the motor (or a motor with a speed reducer). One end of the rope 16 is connected, and the other end of the rope 16 is wound and connected to the winding roller 15 via guide pulleys 17 and 18, respectively.

The blocking screen 12 covers the air inlet 4 and the air outlet 5 of the cooler chamber 6 as well as the outer surface of the opposing side wall 3 when extended. For example, as shown in FIG. It can be formed from a foldable curtain material formed by bendably connecting the curtains.

In this case, the portion covering the air inlet 4 or the air outlet 5 and the portion covering the opposing side wall 3 are made of a cold-resistant soft sheet material that is stretchable in any direction and does not harden even at low temperatures, such as a polyethylene sheet or a rubber film. to connect each other.

Further, the rope 16 is provided in such a manner that it does not inhibit the expansion and contraction of the shielding curtain 12.

Note that 19 is a circulating air fan for the cooler room, 20 and 21 are a circulating air inlet and an outlet, respectively, and 22 is a circulating air duct.

Since the cooler device of the present invention has the above-described configuration, during the cooling operation of the cooler 7, the rope 15 is wound up and the shielding curtain 12 is contracted and pulled up, as shown in FIG. Therefore, the air inlet 4 and the air outlet 5 are opened, and the exhaust fan 8 is energized.

The air entering from the air inlet 4 passes through the cooler 7, is cooled, and is sent into the refrigerator compartment from the air outlet 5 by the exhaust fan 8, thereby cooling the refrigerator compartment.

During this time, the circulation fan 19 in the cooler room is stopped.

When frost thickly adheres to the cooler 7, for example, high-temperature refrigerant is supplied into the cooler 7 from the compressor discharge port to perform defrosting.

When shifting to this frost operation, the holding force of the rope 16 by the take-up roller 15 is released and the rope 16 can be freely let out, and as a result, the weight frame 13 descends due to gravity and the shielding curtain 12 closes. The weight frame 13 is successively extended downward until it reaches the upper surface of the lower flange 11.

In this state, the extended shielding curtain 12 covers the peripheral side surface of the cooler chamber 6 including the air inlet 4 and the air outlet 5,
Moreover, since the heavy frame 13 is brought into close contact with the lower flange 11 due to gravity, the cooler chamber 6 is shielded from the outside.

Therefore, the heat applied to the cooler 7 is prevented from escaping to the outside, and the required defrost can be achieved extremely efficiently and within a short time.

The cooler room circulating air fan 19 is energized during this frost, sucking a portion of the air inside the cooler 6 from its airflow 20 and feeding it back into the cooler room 6 through the outlet 21 through the duct 22.

This air circulation makes the temperature inside the cooler chamber 6 uniform,
The efficiency of the frosting can be further improved.

Further, by arranging the outlet 21 to face the drain port 9 as shown in the figure, the melted water can be smoothly discharged to the outside from the damper-equipped drain port 9 by utilizing the discharge pressure of the wind.

In addition to using a high-temperature refrigerant as described above as a heat source for defrosting, an electric heater or the like may be provided in advance in the cooler chamber 6 to generate heat by energizing it during defrosting.

When the defrosting is completed as described above, the cooling operation is resumed.

During this return, the motor 14 is energized by a command signal from a timer or a defrosting switch (not shown), and the rope 16 is wound up by the winding roller 15.

As a result, the weight frame 13 rises, the shielding curtain 12 rises while shrinking, and finally the upper flange 10 as shown in FIG.
It is stored directly below the bottom surface of the

As shown, the upper flange 10 preferably has a space 23 for accommodating the curtain reduction body.

In this stored state, the winding roller 15 is locked.

Of course, in order to achieve this lock, a brake motor that automatically applies a brake to the drive shaft when deenergized is used as the motor 14, and when the state shown in FIG.
4 may be provided.

Therefore, in the present invention, the air inlet 4 and the air outlet 5 can be easily blocked by simply reducing and raising the shielding curtain 12 or extending and lowering it, and since the shielding curtain 12 is cylindrical, When extended and lowered, the cooler chamber 6 can be completely shielded from the outside.

That is, in the method of blocking the air inlet 4 and the air outlet 5, it is necessary to bring the respective openings and the shielding curtain into close contact with each other, but in the present invention, there is no such need, and the shielding curtain 12 is closed. It is sufficient to connect the upper end edge to the upper flange 10 airtightly, and to bring the weight frame 13 into close contact with the lower flange 11 when the shield curtain 12 is extended and lowered, and these can be achieved very easily. can do.

As described above, the cooler device of the present invention has an extremely simple configuration and can easily and reliably isolate the cooler chamber from the cooling space during defrosting of the cooler, thereby defrosting with high efficiency. In addition, there are great benefits such as the space occupied by the blocking screen is small.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view of the cooler device of the present invention, FIG. FIG. 4 is a sectional view showing a state in which the shielding curtain is reduced and raised. 1... Upper bottom wall, 2... Lower bottom wall, 3...
... Opposite side wall, 4 ... Wind inlet, 5 ...
...Air outlet, 6...Cooler room, 7...
Cooler, 8... Exhaust fan, 12...
Shielding curtain, 13... Weight frame, 14...
Motor, 15... Winding roller, 19...
・Cooler indoor circulation fan.

Claims (1)

[Scope of utility model registration request] A cooler chamber having an air inlet and an air outlet at an end surface, a cooler and a fan disposed in the cooler chamber, and an axially extending cooler chamber provided so as to cover a circumferential surface including the end surface of the cooler chamber when extended. A cooler device comprising a telescopic, bellows-shaped cylindrical impermeable shielding curtain and a shielding curtain drive mechanism comprising a heavy frame attached to the lower part of the shielding curtain.