JP2503755B2 - refrigerator - Google Patents

Description

TECHNICAL FIELD The present invention relates to a soundproof structure against noise of a compressor and a blower fan installed in a machine room of a refrigerator.

[Prior Art] FIG. 11 and FIG. 12 are a plan view and a cross-sectional view of a machine room of a conventional refrigerator shown in JP-A-60-16286, respectively.

In the figure, (1) is a side plate forming left and right side walls of the machine room, (6) is a compressor, (7) is a blower fan for blowing air in the machine room, (16) is a condenser, and (18) is a machine. The top plate of the chamber, (21) the outlet of the front of the machine room, (22) the partition that divides the machine room into the intake side and the exhaust side, and (23) the soundproof material attached to the partition (22). , (24) are soundproof materials attached to the soundproof material plate (27), (25) and (26) are soundproof materials attached to the side plate (1), and (27) is for the compressor (6). A soundproof plate provided at the front, (28) is a back soundproof plate that closes the back surface of the machine room, and (29) is a soundproof material attached to the top plate (18).

Since the conventional refrigerator is configured as described above, it is placed in the space surrounded by the partition (22), the side plate (1), the rear soundproof plate (28), the soundproof plate (27), and the top plate (18). The emitted sound of the compressor (6) and the blower fan (7) is partially absorbed by the soundproofing materials (23) (24) (25) (26) (29), and the discharge port ( 21) and the sound passing through the ventilation path between the soundproof plate (27) and the soundproof material (23) (26) (29) is transmitted to the outside air.

[Problems to be Solved by the Invention] Since the machine room of the conventional refrigerator is configured as described above, since the front opening area on the condenser side is larger than the cross-sectional area of the ventilation passage on the end surface of the soundproof plate (27), Since the sound emitted from the ventilation passage on the end face of the soundproof plate (27) to the condenser side is directly transmitted to the outside air, the sound radiated to the outside air of the compressor and the blower fan, which are the sound sources in the machine room, are ) (26) (29), soundproofing plate (27), rear soundproofing plate (28), partition wall (22) to the surface area of the first sound source chamber front discharge port (21) and soundproofing plate (27) ) There is a problem that a good soundproofing effect cannot be obtained even if a large amount of soundproofing material is used, because it is determined by the ratio of the sum of the cross-sectional areas of the end face ventilation passages.

The first invention of the present invention has been made to solve the above problems, and an object thereof is to obtain a refrigerator having a good soundproofing effect even with a small amount of soundproofing material.

[Means for Solving the Problems] A refrigerator according to a first aspect of the present invention is provided in the center of a machine room, is provided with a compressor and a blower fan as a sound source, and is partitioned by a partition plate. The sound source chamber communicates with the first sound source chamber through an opening provided at an end of the one partition plate on the upstream side of the air passage, and has an intake port on the opposite side of the opening and the partition plate. At least a part of the inner wall communicates with the intake sound-absorbing duct formed of a soundproof material and the first sound source chamber and an opening provided at an end of the other partition plate on the downstream side of the air passage. An exhaust sound absorbing duct having an exhaust port on the opposite side along the partition plate and at least a part of the inner wall of which is made of a soundproof material; and centering on the first sound source chamber, on the air path of the first sound source chamber The sound absorption duct for intake is installed in the It is the one in which the air passages are formed by juxtaposing each of them.

Further, a portion where at least one of the intake port of the intake sound absorbing duct and the exhaust port of the exhaust sound absorbing duct is opened in a direction orthogonal to the partition plate, and the duct internal flow path is bent toward the at least one of the intake port and the exhaust port. In the refrigerator according to the second aspect of the present invention, the sound emitted from the intake sound absorbing duct that houses the condenser is blocked by the vibration isolating rubber for supporting the condenser.

Further, the refrigerator according to the third aspect of the present invention has a first sound source chamber accommodating the compressor and the blower fan and a second sound source chamber communicating with the intake sound absorbing duct accommodating the condenser, respectively. A first exhaust duct and a second exhaust duct adapted to each of them are separately attached.

Furthermore, the refrigerator which concerns on the 4th invention of this invention is a defrosting water evaporation tray in the said 1st-3rd invention for blocking | interrupting the noise which passes between the lower surface of a condenser and the bottom plate of a machine room. Are installed.

[Operation] In the machine room according to the first invention of the present invention, since the sound absorbing duct for intake and the sound absorbing duct for exhaust that are made of soundproof material are provided in parallel at both ends of the first sound source chamber, the sound is generated by the first sound source. The sound is repeatedly absorbed and reflected in both ducts while being transmitted to the outside air from the room, and the sound that has passed through the wall partitioning the first sound source room and entered the duct is also absorbed and reflected. Since it is repeated, a large soundproofing effect can be obtained even with a small amount of soundproofing material.

In the machine room according to the second aspect of the present invention, noise generated around the interior condenser is blocked by the supporting vibration isolating rubber.

Similarly, the machine room in the third invention of the present invention is the first
Noise emitted from the sound source chamber and the second sound source chamber is effectively reduced by the respective first exhaust duct and second exhaust duct adapted to each.

Further, the machine room in the fourth aspect of the present invention is the second aspect.
Noise emitted from the sound source room is reduced by the defrosting water evaporation dish inside.

Embodiment An embodiment of the first invention of the present invention will be described below with reference to the drawings. It should be noted that parts corresponding to those in the conventional technique are designated by the same reference numerals to avoid redundant description. 1 and 2 are a plan view and a sectional view, respectively, showing an embodiment of the first invention of the present invention.

In the figure, (1a) is an intake port provided on the right side plate (1), (1b) is an intake port (1a) and an exhaust port provided on the opposite side plate (1), and (2) is a machine room. Front plate, (3) a rear plate of the machine room, (4) a partition plate provided in front of the compressor (6) and the blower fan (7) in the machine room, and (4a) a partition plate (4). At the left end of the partition, (5) is a partition plate provided behind the compressor (6) and the blower fan (7) in the machine room, and (5a) is the right side of the partition plate (5). An opening provided at one end, (8) is a bell mouth arranged on the outer periphery of the blower fan (7), and (9) is a sound absorbing member attached to the front plate (2) and the top plate (18). Soundproof material, (10) sound-absorbing soundproof material attached to the partition plate (5), (11) the bottom plate of the machine room, (12) the side plate (1) and the front plate (2) and the partition Plate (4), top plate (18), and bottom plate (11) The sound absorbing duct for intake air, which is partitioned by the condenser (16) and stores the condenser (16), the side plate (1), the partition plates (4) and (5), the top plate (18), and the bottom plate (1).
The first sound source chamber partitioned by 1), and (14) the exhaust sound absorbing duct partitioned by the partition plate (5), the rear plate (3), the side plate (1), the top plate (18), and the bottom plate (11). Is. Ventilation in the machine room is blown by the blower fan (7), is sucked from the intake port (1a), the sound absorbing duct for intake (12), the opening (4a), the first sound source chamber (13), the opening (5a) and An S-shaped air passage is formed by sequentially passing through the exhaust sound absorbing duct (14) and being discharged to the outside from the exhaust port (1b).

Since this embodiment is configured as described above, the sounds of the compressor (6) and the blower fan (7) emitted in the first sound source chamber (13) partitioned into the machine room are separated by the partition plate (4). ) (5) through the openings (4a) and (5a) of the intake sound absorbing duct (12) and the exhaust sound absorbing duct (14) provided adjacent to both ends of the first sound source chamber (13). Radiated to the edge. The sound radiated to the intake sound absorbing duct (12) is repeatedly absorbed by the soundproof material (9) while being repeatedly reflected between the partition plates (4) of the front plate (2), and also transmitted through the partition plate (4). Similarly, the sound that has entered the intake sound-absorbing duct is also absorbed, and a part of the remaining sound is transmitted to the outside air through the intake port (1a) provided in the side plate (1). Similarly, the sound radiated to the exhaust sound absorbing duct (14) is repeatedly reflected between the rear plate (3) and the partition plate (5) and is repeatedly absorbed by the soundproof material (10), and the partition plate (5) is also used. ) Through the exhaust sound absorbing duct (14) is also similarly absorbed, and the remaining sound is partially exhausted (1b) provided on the side plate (1).
It is transmitted to the outside air.

In the above embodiment, both the sound absorbing duct for intake air and the sound absorbing duct for intake air are straightly transmitted to the outside air, but as another embodiment, as shown in FIGS. 3 and 4, the intake port (1a) and Instead of the exhaust port (1b), for example, the front plate (2)
Is provided with an intake port (2a) that opens in a direction orthogonal to the partition plate (4) and a deflection plate (2b) that bends the duct internal flow path in the direction of the intake port (2a). ), An exhaust port (3a) opening in a direction orthogonal to the partition plate (5),
A deflection plate (3b) that bends the flow path in the duct toward the exhaust port (3a) is provided so that the intake sound absorbing duct (12) and the exhaust sound absorbing duct (14) have a first sound source chamber (13) and an opening. (4a) (5
By forming a part that bends the sound traveling from a) at a right angle, the deflection plate (2
Sound is further absorbed by the soundproof plate (9) because it is partially reflected between b) and the side plates (1) on both sides, and similarly in the exhaust sound absorbing duct, the deflection plate (3b) and the side plates on both sides ( Since a part of the sound is reflected repeatedly between 1),
Sound is further absorbed by 0).

FIGS. 5 (a) and 5 (b) show the thank-you effects of the conventional example, the above-described example, and the other examples. The vertical axis represents (level when a sound source is put in the machine room of each example). It represents the level difference indicated by- (sound source level), and means the amplification factor of the machine room with respect to the sound source. The horizontal axis shows the center frequency of 1/3 octave.
In the embodiment of FIG. 5 (a), the embodiment is superior to the conventional example in all frequency bands except the 250 Hz band, and in the other embodiment of FIG. 5 (b), it is implemented in the frequency band of 315 Hz or less. Although it is almost the same as the example, it shows its further effect in the frequency band of 800 Hz or higher, and the increase in the vicinity of the 630 Hz band which appears as a disadvantage at this time is because the resonance in the machine room becomes remarkable, When compared with the conventional example, the resonance of the conventional example is in the 315 Hz band, and the amplification level is similar, so the difference in absolute value level of the sound source between the 315 Hz band and the 630 Hz band is 10 dB higher in the 315 Hz band, so It will be superior to the conventional example. Therefore, in both the embodiment and the other embodiments, since the sum of the respective frequency bands is the overall effect, it can be seen that both can achieve much lower noise than the conventional example.

Next, one embodiment of the second invention of the present invention will be described. That is, the same or corresponding parts as those of the first invention are designated by the same reference numerals and their duplicate description will be omitted, but in FIGS. 6 and 7, (2) is the front plate, (2)
a) is an intake port provided on one side, (2b) is an exhaust port provided on the opposite end of the intake port (2a), (4) is a partition plate that divides the machine room into front and rear, 4a) and (5a) are intake ports and exhaust ports which are formed at both ends of the partition plate (4) and communicate with the first sound source chamber (13) between them, and (12) is a front plate (2) and a side plate (1). An intake sound-absorbing duct which is composed of a middle partition plate (22), the partition plate (4), a top plate (18) and a bottom plate (11) and communicates with the intake port (4a) of the first sound source chamber (13). , (16) is a condenser that is arranged in the duct (12) and serves as a second sound source, (9a) is a vibration-proof rubber that elastically supports the condenser (16), and (24) is the condenser (16). ) A straightening plate that allows air to uniformly flow in the inside, and (25) is a front plate (2), a middle partition plate (22), a side plate (1), a partition plate (4), a top plate (18) and a bottom plate (25). 11) By And a sound absorbing duct for exhaust which communicates with the exhaust port (5a) of the first sound source chamber (13), (30) is a defrosting water evaporating plate placed on the inner bottom thereof, and (31) is an interior The deflection plate is provided in the exhaust sound absorbing duct (25) in order to increase the number of times sound is absorbed and reflected by the soundproof material (10). Ventilation in the machine room is performed by the blower fan (7), sucked through the suction port (2a), the sound absorbing duct for intake (12), the exhaust port (4a), the first sound source chamber (13), the exhaust port (5a). ), Through the sound absorbing duct for exhaust (25) and the exhaust port (2b) to the outside.

Since the second invention of the present invention is configured as described above, noise generated by the compressor (6) and the blower fan (7) generated in the first sound source chamber (13) partitioned in the machine room. Is radiated to the ends of the intake sound absorbing duct (12) and the exhaust sound absorbing duct (25) from the intake port (4a) and the exhaust port (5a) provided in the partition plate (4). Then, the noise radiated to the intake sound absorbing duct (12) is first repeatedly reflected between the partition plate (4) and the rectifying plate (24), and the soundproof material (10) attached to the partition plate (4). Is repeatedly absorbed by the soundproofing material (10) attached to the top plate (18) and the bottom plate (11) while repeatedly reflecting between the top plate (18) and the bottom plate (11), and then The remaining sound is emitted to the outside through the intake port (2a). At this time, the condenser (16), which is the second sound source, has a vibration-proof rubber (9
Since it is elastically supported tightly in the sound absorption duct (12) for intake by a), even if the condenser (16) is vibrated by the pulsation of the refrigerant circulating in the refrigerant pipe (16b), the bottom plate (11)
Vibration is cut off and the vibration transmission sound due to this is prevented, and the gap around the outer periphery of the condenser (16) is a rubber vibration isolator (9a).
In addition, since the intake air surely passes through the condenser (16) because it is blocked by the soundproofing material (10), the required air volume can be reduced, and the noise generated by the blower fan (7) itself can be reduced. It can also be reduced. Similarly, the noise radiated to the exhaust sound absorbing duct (25) is repeatedly reflected between the partition plate (4) and the deflector plate (31) and between the middle partition plate (22) and the side plate (1) while being separated. After being absorbed by the soundproofing material (10) attached to the plate (4) and the partition plate (22), a part of the remaining sound is emitted to the outside through the exhaust port (2b).

Next, FIG. 8 shows an embodiment of a third invention of the present invention. In this case, the flow regulating plate (24), the partition plate (4),
Second partition plate (22a), top plate (18) and bottom plate (11)
Blower fan (7a) dedicated to the condenser (16)
The second sound source chamber (13
a), the first sound source chamber (13) in which the compressor (6) and the blower fan (7) are arranged are separately provided, and communicate with the first sound source chamber (13) through the exhaust port (5a). In addition to the above exhaust duct (25), an exhaust sound absorbing duct (25a) communicating with the intake sound absorbing duct (12) via the exhaust port (5b) is separately formed, and each sound absorbing duct has the most soundproof effect. It is characterized in that it is adapted to the high frequency band and the frequency with high sound pressure level of each sound source, respectively, whereby the sound absorption efficiency is further improved. At this time, (2c) is an intake port provided at one end of the front plate (2) so as to communicate with the intake port (4a), and (2d) is a condenser (1
6) Another exhaust port provided in the front plate (2) so as to be adjacent to the exhaust port (2b) on the opposite side so as to communicate with the second sound source chamber (13a).

Further, FIGS. 9 and 10 show an embodiment of the fourth invention of the present invention. The same parts as those of FIG. 6 are designated by the same reference numerals and their duplicate description will be omitted. But,
In this case, the defrosting water evaporation tray (30) is arranged between the lower surface of the condenser (16) and the bottom plate (11) of the machine room, and the refrigerant pipe (16b) constituting the condenser (16). The rising ribs are formed on the evaporating dish (30) so as to be located under the front row and the last row of the evaporating dish (30), and the rising ribs serve as a sound insulating wall for the noise traveling in the space between the evaporating dish and the condenser. The soundproof material (10) of the partition plate (4) repeatedly absorbs the noise that hits the rear rising ribs by this,
In addition, the noise hitting the front rising ribs is absorbed by the soundproof material (10) of the top plate (18), so that the same effect can be obtained with a smaller amount of soundproof material than in the above inventions. Is characterized by. Note that (30a) in the figure shows the handle portion of the defrosting water evaporation dish.

[Effects of the Invention] As described above, according to the first invention of the present invention, the first sound source is provided in the center of the machine room, is provided with the compressor and the blower fan serving as the sound source, and is partitioned by the partition plate. An air-intake duct that communicates with the chamber by an opening of one of the partition plates of the first sound source chamber, has an intake port on the opposite side of the opening, and forms at least a part of the inner wall with a soundproof material;
The first sound source chamber communicates with the opening of the other partition plate, has an exhaust port on the side opposite to this opening, and includes an exhaust sound absorbing duct having at least a portion of its inner wall made of a soundproof material, With the first sound source chamber as the center, an intake sound absorbing duct is provided upstream of the first sound source chamber, and an exhaust soundproof duct is provided downstream of the first sound source chamber. A refrigerator with good effect can be obtained.

Further, since at least one of the intake port of the sound absorbing duct for intake and the intake port of the sound absorbing duct for exhaust is provided with a portion for bending the duct internal flow path at a right angle, there is an effect that a refrigerator having a better soundproofing effect can be obtained.

On the other hand, according to the second aspect of the present invention, as described above, the condenser, which serves as the second sound source, is airtightly provided in the sound absorbing duct for intake, which communicates with the intake port provided in the machine chamber, via the rubber cushion. As a result, not only can a large amount of soundproofing be obtained with a small amount of soundproofing material, but air can also flow reliably through the condenser, reducing the required air volume and reducing the noise itself generated by the blower fan. Further, even if the condenser is vibrated by the pulsation of the circulating refrigerant, it is possible to prevent the vibration transmission to the bottom plate, so that the vibration transmission sound can be reduced and the refrigerator having a good soundproof effect can be obtained.

Further, the third invention of the present invention is provided with the second sound source chamber in which the condenser blower fan is arranged and the first sound source chamber in which the compressor and the cooling blower fan are arranged as described above. Since the exhaust sound-absorbing ducts that communicate with each other are individually formed, it is possible to match the frequency with the highest soundproofing effect of each sound-absorbing duct to the frequency with the highest level of each sound source, which results in high absorption efficiency. Can be improved.

Further, according to the fourth aspect of the present invention, since the defrosting water evaporation tray provided with the rising ribs for sound insulation is arranged between the lower surface of the condenser and the bottom plate of the machine room as described above, less soundproof material is provided. Sufficient soundproofing effect can be obtained by using.

[Brief description of drawings]

1 is a horizontal sectional view of a machine room in the refrigerator of the first invention of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIG. 3 is the same as the other embodiment of FIG. FIG. 4 is a horizontal sectional view of FIG. 4, FIG. 4 is a sectional view taken along the line BB of FIG. 3, FIGS. The horizontal sectional view of the machine room in the refrigerator of 2nd invention, 7th
6 is a horizontal sectional view of a machine room in the refrigerator of the third invention of the present invention, and FIG. 9 is a machine sectional view of the refrigerator of the fourth invention of the present invention. A horizontal sectional view, FIG. 10 is a sectional view taken along the line AA of FIG. 9, FIG. 11 is a horizontal sectional view of a machine room in a conventional refrigerator, and FIG. 12 is a vertical sectional view of the machine room. In addition, in FIGS. 1, 2, 3, and 4, (1) is a side plate, (1a) is an intake port, (1b) is an exhaust port,
(2) is a front plate, (2a) is an intake port, (2b) is a deflection plate,
(3) is a rear plate, (3a) is an exhaust port, (3b) is a deflection plate,
(4) is a partition plate, (4a) is an opening part, (5) is a partition plate, (5a) is an opening part, (6) is a compressor, (7) is a blower fan, (8) is a bell mouth, ( 9) and (10) are soundproof materials,
(11) is a bottom plate, (12) is a sound absorbing duct for intake, (13) is a first sound source chamber, (14) is a sound absorbing duct for exhaust, (15) is a vibration proof rubber, (16) is a condenser, (17) ) Is the back plate, (18) is the top plate,
(19) is an inner box and (20) is a heat insulating material. In FIGS. 6 and 7, (4) is a partition plate, (4a) is an intake port, (5a) is an exhaust port, (9a) is an anti-vibration rubber, (22) is an intermediate partition plate, and (25). ) Is an exhaust sound absorbing duct. In FIG. 8, (5a) and (5b) are exhaust ports, and (13) is the first
The sound source chamber, (13a) is the second sound source chamber, (25) is the first exhaust duct, and (25a) is the second exhaust duct. Further, (30) in FIG. 10 is a defrosting water evaporating dish. In addition, the same reference numerals in the drawings indicate the same or corresponding parts.

Claims (5)

(57) [Claims] A compressor (6) for partitioning a machine room in a main body provided with a freezing room, a refrigerating room, etc., and a blower fan (7) for sending air to the compressor (6). In the refrigerator arranged in the machine room, a compressor (6) and a blower fan (7) which are provided in the center of the machine room and serve as a sound source.
And the first sound source chamber (13) partitioned by the partition plates (4) and (5), and the air passage upstream end of one partition plate (4) of the first sound source chamber (13). Opening provided (4a)
Sound absorption for air intake that has an air inlet (1a) on the opposite side along the opening (4a) and the partition plate (4) and has at least a part of the inner wall made of a soundproof material (9). The duct (12) and the opening (5a) provided at the air passage downstream end of the first sound source chamber (13) and the other partition plate (5).
A sound absorbing material for exhaust which has an exhaust port (1b) on the opposite side along the opening (5a) and the partition plate (5) and has at least a part of its inner wall made of a soundproof material (10). A duct (14), the first sound source chamber (13) being the center, the intake sound absorbing duct (12) upstream of the first sound source chamber (13), and the exhaust sound absorbing duct downstream of the air passage. A refrigerator characterized in that an air passage is formed by arranging (14) side by side. 2. At least one of the intake port (2a) of the intake sound absorbing duct (12) and the exhaust port (3a) of the exhaust sound absorbing duct (14) is opened in a direction orthogonal to the partition plates (4) (5). The flow path in the duct to at least one of the intake ports (2a)
The refrigerator according to claim 1, further comprising a portion (2b) (3b) bent in the direction of the exhaust port (3a). 3. A machine room is defined in a main body provided with a freezing room, a refrigerating room and the like, and a compressor (6) for compressing a refrigerant and a blower fan (7) for sending air to the compressor (6). In the refrigerator arranged in the machine room, a first sound source chamber (1) accommodating the compressor (6) and a blower fan (7) for cooling the compressor (6)
3) In the rear part, the intake sound absorbing duct (12) for housing the condenser (16) is formed in the front part, and the exhaust sound absorbing duct (25) partitioned by the partition plate (22) is formed on the side of the intake sound absorbing duct (12). And a partition plate (4) provided at both ends with an intake port (4a) and an exhaust port (5a) communicating with the intake sound absorbing duct (12) and the exhaust sound absorbing duct (25). The air gap around the condenser (16) housed in the sound absorbing duct (12) is sealed by the supporting vibration isolating rubber (9a), and the sound absorbing duct for intake (12) and the sound absorbing duct for intake (25) A refrigerator characterized in that a soundproofing material (10) is attached to each inner wall surface of the refrigerator. 4. A machine room is defined in a main body having a freezing room, a refrigerating room and the like, and a compressor (6) for compressing a refrigerant and a blower fan (7) for sending air to the compressor (6). In the refrigerator arranged in the machine room, a first sound source chamber (1) accommodating the compressor (6) and a blower fan (7) for cooling the compressor (6)
3) is divided into the rear part and the front part with this, and the condenser (16)
And a second sound source chamber (13a) communicating with the sound absorbing duct (12) for accommodating the air, and an exhaust port (5a) of the first sound source chamber (13). The exhaust port (5b) of the second sound source chamber (13a) has a sound-insulating first duct (25) adapted to each of the sound sources.
A refrigerator characterized in that a second exhaust duct (25a) is separately provided. 5. A defrosting water evaporation tray (30) for blocking noise passing between the lower surface of the flocculator (16) in the machine room and the bottom plate (11) of the machine room is arranged. The refrigerator according to any one of claims 1 to 4, which is characterized in that.