JPS6027333Y2 - refrigerator - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a forced air circulation type refrigerator, and particularly relates to reducing the noise of an air circulation fan.

BACKGROUND ART Conventionally, a fan for circulating air inside a refrigerator used for household use has been a propeller fan due to cost considerations.

As is well known, when this propeller fan is used with a relatively small air path resistance and a large air volume, it has the advantage of producing low noise and blowing air in the axial direction.

However, when the air passage resistance is large and the air volume is reduced, the noise is high and the air is scattered in the radial direction rather than the axial direction.

On the other hand, the volume occupied by ducts and the like that forcefully circulate cold air inside the refrigerator must be small, and therefore the cross-sectional area of the air passages is also small.

In addition, the frost that adheres to the cooler may cause it to become clogged, and the air path resistance increases, so if a propeller fan is used, the noise increases and the cooler becomes clogged with frost. The drawback was that the air volume decreased significantly once the system was started.

In addition, when the door of the freezer compartment is used, the moisture from the outside air that enters adheres to the partition plate, etc., but the grill that forms the air path of the partition plate located in front of the fan is well cooled. Freezing was a problem in many ways.

This invention aims to eliminate such drawbacks.

Hereinafter, this invention will be explained in detail with reference to the illustrated embodiment. Reference numeral 1 denotes a refrigerator body, which is composed of a heat insulating box body in which a foamable heat insulating material is injected and foamed into a space formed by assembling an outer box and an inner box.

Reference numerals 2 and 3 are a freezer compartment and a refrigerator compartment formed by partition walls inside the main body, and 5 and 6 are a freezer compartment door and a refrigerator compartment door that freely open and close the front openings of these freezer compartments and refrigerator compartments. .

Reference numeral 7 denotes a cooling chamber formed by partitioning the rear gold mine of the freezing chamber 2 with a heat insulating partition plate 8, and 9 a cooler installed in this cooling chamber, which together with the compressor 10 constitutes a well-known refrigeration system.

Reference numeral 11 denotes a fan device for air circulation installed above this cooler, which includes a fan motor 12 attached to the outside of the main body and a turbo fan or the like that rotates near the outlet side of the discharge port 13 opened in the heat insulating partition plate 8. It consists of 14 radial fans.

Reference numeral 15 denotes a wind direction guide formed into a smooth conical shape near the discharge port 13 so as to guide the blowing direction of the radial fan, and is integrally formed with the heat insulating partition plate 8.

The cold air blown out in the radial direction by the radial fan 14 is blown out along the wind direction guide without unevenness inside the refrigerator.

Reference numeral 16 denotes a freezer compartment partition plate arranged in number in front of the radial fan so as to cover the entire surface of the heat insulating partition plate 8, and has a large number of blow-off holes outward from the partition plate portion corresponding to the fan. 17 is open.

18 is a freezer compartment suction port provided at the bottom of this partition plate, which communicates with the cooler 7.

Reference numeral 19 denotes a ventilation duct that communicates between the cooling chamber 7 and the refrigerator compartment 3, and is formed on the back side of the refrigerator main body so as to guide a part of the cold air blown into the freezer compartment 2 to the refrigerator compartment 3. One end is connected to an inlet 20 that opens in the wind direction guide 15, and the other end is connected to a refrigerator compartment outlet 21 that opens into the refrigerator compartment.

Reference numeral 22 denotes a damper thermostat that controls the amount of cold air supplied into the refrigerator compartment by freely opening and closing this refrigerator compartment outlet; 23 designates a refrigerator compartment inlet opening at the front of the lower surface of the inner partition wall 4; It communicates with the cooling chamber 7 via an air passage 24 penetrating the inside of the wall.

Next, to explain the operation of the above embodiment, the air cooled by the cooler 9 is sucked by the radial fan 14, guided along the wind direction guide 15, and flows into the refrigerator from the blow-off hole 17 opened in the freezer compartment partition plate 16. It is blown out and diffused for even cooling.

In addition, a part of the cold air passes through the ventilation tact 19 from the inlet 20 of the wind direction guide, and from the damper thermometer 2 from the refrigerator compartment outlet 21.
2, the inside of the refrigerator compartment 3 is cooled to a predetermined temperature.

As mentioned above, this invention uses a radial fan for air circulation inside the refrigerator, so in the aerodynamic characteristics of the conventionally used propeller fan and radial fan shown in Figure 3, the conventionally used propeller fan shown by the broken line In the aerodynamic characteristics of fans and radial fans, the pressure of the propeller fan that intersects with the load curve A of the air path of a refrigerator, etc.
The flow rate curve B is slightly horizontal, and the pressure/flow rate curve C of the radial fan is slightly vertical.

As shown in FIG. 4, the specific noise level of the vertical fan E becomes lower when the flow rate is smaller than that of the propeller fan D, as shown in FIG.

Furthermore, as in this invention, by blocking the front part of the freezer compartment partition plate disposed in front of the radial fan that corresponds to the fan, the noise is reduced as shown in F, and a sound insulation effect can be expected.

Further, since there are no members that cause turbulence in the front part of the fan, no vortices are generated and the aerodynamic characteristics are good.

Furthermore, moisture from the outside air that enters when the door is opened and moisture contained in stored foods, etc., does not freeze on the front member of the fan, making it possible to provide a refrigerator that is low in noise and can withstand severe usage conditions. can.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a refrigerator showing an embodiment of this invention.
Figure 2 is a sectional view taken along the line ■-■ in Figure 1, Figures 3 and 4.
The figure is a comparison curve of the aerodynamic characteristic curve and specific noise level of a propeller fan and a radial fan. 2 is a freezer compartment, 9 is a cooler, 14 is a radial fan, 16
1 is a freezer compartment partition plate, and 17 is an air outlet.

Claims (1)

[Scope of utility model registration request] In a refrigerator that has a cooler and fan installed on the back side of the freezer compartment to force cold air to circulate inside the compartment,
A refrigerator characterized in that the fan is a radial fan, a freezer compartment partition plate is disposed in front of the fan, and a large number of air outlets are opened outward from the partition plate portion corresponding to the fan. .