JPS5920617Y2 - refrigerator - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigerator that aims to reduce the pressure rise in the refrigeration cycle circuit that occurs when the cooler frosts.

Generally, in refrigerators etc. that have fin coil coolers with cold air forced circulation, a defrosting heater installed in or around the cooler body is used to prevent cooling power from decreasing due to frost buildup on the cooler. It is common to periodically floss 1~.

Also, during this frosting process, in order to completely melt the frost without leaving any frost on or around the cooler, the temperature of the cooler should be between 15 and 2.
It is necessary to raise the temperature to about 5°C, and in this case, the ambient temperature will rise to 30'C at the end of frosting, and at this time, the high and low pressure sides will rise to about 4 to 5 kg/cm2G. Requires a large amount of torque.

This tendency occurs when the ambient temperature is high or when the power supply voltage is low, and this may cause compressor starting failure, so the torque design of the compressor motor is designed to be large enough to match the starting load after defrosting. There is a need to.

However, if a chamber is provided that is connected to a part of the refrigerant path (cooling pipe) of the cooler by a thin tube and the temperature of this chamber is not raised during defrosting, the refrigerant during the frosting will condense in the chamber and the gas in the cooling system will This reduces the amount of refrigerant and greatly reduces the high and low pressures at the end of frosting, which not only makes it easier to start the compressor after defrosting 1, but also improves motor efficiency by lowering the I to Lux of the compressor motor. There are advantages such as being able to

The present invention has been made in order to simplify the mounting structure of the chamber for the pressure cutter I~ and the mounting structure of the cooler.

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

FIG. 1 shows a schematic cross-sectional view of the air passage of the refrigerator.

Here, a cold air forced circulation fan 11 is disposed above the fin coil cooler 1 in the cooling chamber A, and the cold air is discharged back and forth and circulated to the freezing chamber 3a and the refrigerating chamber 4a, respectively.

The cooler 1 includes end plates 2, 2 on both sides, and a large number of fins la, la, and fins arranged in parallel between the end plates 1 and 1.
... and a cooling pipe 1b inserted perpendicularly thereto.

On one side of the end plate 2 of the cooler 1, the upper end is bent to form a bent piece 2a, and a newly bent part of the cooler pipe 1b is connected to this bent piece 2a by a thin tube 3. Chamber 4 for pressure increase cup 1-
A notch 5 is provided for inserting and fixing.

This notch 5 is provided with a flange 6 or the like to ensure that the chamber 4 is fixed.

Furthermore, a slit hole 7 is provided in the bent piece 2a to prevent heat conduction from the end plate 1-2 to the chamber 4.

FIG. 3 shows the cooler 1 installed in a forced circulation air path.

The tops of both ends of the cooler 1 are molded with a heat insulating material such as expanded polystyrene foam in order to prevent bypass flow from outside the sides of the cooler, that is, where air flows without passing through the fins 1a from the end plates 2, 2. Deflectors 8 and 9 are arranged, and a chamber 4 is placed inside the deflector 8.
It is covered with storage.

Further, a heater 10 for defrost 1 to 1 is inserted into the cooler 1.

In the above embodiment, during defrosting due to heat generated by the heater 10, the temperature rise of the end play 1-2 is caused by the bending piece 2.
The slit hole 7 provided in a is used to suppress heat conduction to the chamber 4, thereby preventing a temperature rise in the chamber 4. At the same time, the deflector 8 prevents a bypass flow and also prevents a temperature rise by insulating the chamber 7 during defrosting. This prevents the pressure increase in the cooler 1 and the refrigerant circuit in its vicinity during defrosting from flowing into the chamber 4, thereby promoting the condensation effect in the chamber 4.

As described above, the present invention is designed to reduce the pressure increase during Tefloss I.
・By installing the chamber on the end plate, which is a component of the cooler, there is no need for separate attachment parts, and at the same time, the chamber can be mounted using the deflector, which is a component of the cooler air path. By covering and insulating the
・It is possible to enhance the effect of preventing a temperature rise in a part of the chamber and increase the effect of reducing pressure rise.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view of the air passage of the refrigerator according to the present invention and its embodiment, Fig. 2 is a perspective view of the cooler in the refrigerator, and Fig. 3 is an enlarged sectional view showing the installation state of the cooler in the refrigerator. It is. 1...Cooler, 2...End play 1
~． 3...tubule, 4...chamber,
8...Tie reflector 10...Defrosting heater.

Claims (1)

[Scope of utility model registration request] Fin coil cooler equipped with a defroster in the cooling chamber,
A fan or the like is arranged to circulate the cool air from the cooler into the refrigerator, and a chamber that is connected to the cooling pipe of the cooler and collects refrigerant during defrosting is fixed to the end plate constituting the cooler. . A refrigerator, characterized in that the chamber is housed within an insulating deflector that prevents a show I circuit from being generated from the cold air guide or end plate of the fan.