JPS62261880A - Refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a refrigerator, and particularly to a refrigerator suitable for shielding noise generated from a machine room.

[Conventional technology]

Conventionally, this type of refrigerator has a machine room 3 in which a compressor 2 is installed in the lower part of the refrigerator body l, as shown in Utility Model Application Publication No. 58-190378 (Fig. 7). In addition to providing a machine room cover 4 that covers the opening, this machine room cover 4 is also provided with air circulation slits 5, but this structure does not cause high levels of noise or noise when the compressor is started. No consideration was given to shielding noise from driving at night.

[Problem that the invention seeks to solve]

In the prior art described above, the air circulation slit provided in the machine room is always open. Therefore, there is a problem in that high-level noise at the time of starting the compressor escapes to the outside through this slit.

An object of the present invention is to provide a refrigerator that can insulate noise generated from a machine room.

[Means for solving problems]

The above object is to provide a refrigerator equipped with a machine room equipped with a compressor and a cover covering the machine room, in which a sound insulating plate provided on the cover and a drive member made of a shape memory alloy connected to the sound insulating plate are provided. The sound insulating plate is achieved by opening and closing a portion of the cover using the driving member.

[Effect]

In the present invention, if the transformation temperature of the shape memory alloy is between the low temperature and high temperature temperatures in the air in the machine room or in the refrigeration cycle in the machine room, the shape memory alloy can be used at high temperatures immediately after the start of the compressor and when the compressor operation is stable. The large change in the shape of the alloy allows the sound insulation board to open and close automatically.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 6. 1 is a refrigerator main body, 6 is an interior, 2 is a compressor, 3 is a machine room formed by the lower part of the refrigerator main body 1 and the base part 7, and the rear opening is covered with a machine room cover 4.

The machine room cover 4 has an air outlet 8 in its upper part and a suction inlet 9 in its lower part.

Sound insulating plates 10a and 10 are provided at the air outlet 8 and the air inlet 9, respectively.
b, and both ends thereof are rotatably attached to opposite ends (not shown) of the machine room cover 4 via shafts 11a and Llb. 12a and 12b are connecting culms, and both ends thereof are sound insulating plates 10a and 10b and the operating rod 14 of the drive unit 13, respectively.
is connected to.

The driving member 13 includes a shape memory alloy 15, a bias spring 16,
It consists of an operating rod 14, and is configured such that a shape memory alloy 15 contracts as shown in FIG. 4 at low temperatures, and expands as shown in FIG. 5 at high temperatures. 17 is a sound absorbing material attached to a sound insulating plate.

Next, the operation of the above configuration will be explained. When the compressor 2 starts and starts operating, the temperature in the machine room 3 gradually rises, and when the shape memory alloy 15 is heated and reaches a transformation temperature (approximately 40°C) or higher, it generates a large force and as shown in FIG. (Stretches, compresses the opposing bias spring 16, pushes up the operating rod 14, and as a result, the sound insulation plates 10a, 10b are
The shape memory alloy 15 is kept at a temperature above its transformation temperature, and the air inside the machine room 3 circulates efficiently as shown by the thick arrow. As long as the inside of the refrigerator 6 is cooled enough, the refrigerator interior temperature control thermostat (not shown) is turned off, and the compressor 2 When the machine is stopped, the temperature in the machine room 3 gradually decreases and when the shape memory alloy 15 becomes below the transformation temperature, the shape memory alloy 1 succumbs to the repulsive force of the compressed bias spring 16.
5 contracts, and as a result, the operating rod 14 is pushed down as shown in FIG. This is done only with air exchanged through the gap in the air outlet 8, etc., but since the temperature in the machine room is high (there is none), there is no problem.

FIG. 6 is an explanatory diagram showing the 0N-OFF cycle of the compressor, the temperature of the shape memory alloy, and the opening/closing status of the sound insulating plate 4° in the above example. The room temperature in the room was 30℃, [al, (t7'
l and (σ) indicate the state at room temperature of 20°C. When the room temperature is 30°C (as shown in al), the operating rate of the compressor is high < , (b
As shown in C1, the temperature of the shape memory alloy exceeds the transformation temperature of 40°C for a while after the compressor is turned on (the shaded area in the figure corresponds). The board opens and closes (opens and closes).At this time, at the time of startup, when the sound of the compressor is the loudest, the temperature of the shape memory alloy is low (therefore, the sound insulating board is in the closed state).

When the room temperature is 20℃, the operating rate of the compressor is low as shown in (a'), and the compressor is turned off before the temperature of the shape memory alloy reaches the transformation point, as shown in (ke). As shown in (σ), the sound insulating plate remains closed, and the operating noise generated from the machine room is always sound-insulated.

〔Effect of the invention〕

According to the present invention, the noise generated from the machine room can be insulated, so that a low-noise refrigerator can be obtained.

[Brief explanation of drawings]

Figures 1 and 2 are longitudinal sectional views of main parts of a refrigerator equipped with the present invention, Figure 3 is a perspective view of a refrigerator equipped with the present invention, and Figures 4 and 5 show modified examples of shape memory alloys. FIG. 6 is an explanatory diagram showing the ON-OFF cycle of the compressor and the opening/closing status of the sound insulating plate in this embodiment, and FIG. 7 is a perspective view showing a conventional refrigerator. ■...Refrigerator body, 2...Compressor, 3...Machine room, 4...Machine room cover, 5...Slit for air circulation, 6...Inside the refrigerator, 7...Pace Part, 8...Blowout port, 9...Suction port, 10a...Sound insulation plate (top), 10b
...Sound insulating board (bottom), t t a-...shaft (top), 1l
b--Shaft (bottom), 12a...Connected culm (top), 12b
... Connection culm (lower), 13 ... Drive section, 14 ... Operating rod, 15 ... Shape memory alloy, 16 ... Bias spring, 17 ... Sound absorbing material. Agent: Patent attorney Katsuo Ogawa, 1. ”, ′, 'jL Tsu86 Figure 12 16-t<47 Subaki

Claims (1)

[Claims] 1. A refrigerator equipped with a machine room provided with a compressor and a cover covering the machine room, comprising a sound insulating plate provided on the cover and a drive member made of a shape memory alloy connected to the sound insulating plate, The refrigerator is characterized in that the sound insulating plate opens and closes a part of the cover by the drive member.