JP2002065552A - Dish washer-dryer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dish washer-dryer realizing low noise by suppressing vibration and noise. SOLUTION: In this dish washer-dryer, a washing tank 1 is provided with a washing nozzle 5 for jetting wash water 7; a washing pump 8 for pressurizing the wash water 7; a heating body 9 for heating the wash water 7 and air; a blower 15 for blasting air into the machine; and a freely opening/closing door 12. The opening/closing door 12 is formed in hollow structure having a space part 12c between an outer door 12a and an inner door 12b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes by injecting washing water, and more particularly, to reducing noise generated by collision of washing water and absorbing noise to reduce noise. It relates to a dishwasher that can be realized.

[0002]

2. Description of the Related Art FIG.
It is a block diagram which shows an example of the conventional dishwasher disclosed in No. 19 publication. The dishwasher sequentially performs steps such as washing, rinsing, draining, and drying the dishes. In the washing and rinsing steps, washing water 7 sprayed from the injection holes 6 of the nozzles 5 wash the dishes 3, and thereafter, This is rinsed, and in the drying step, the blower 15 causes the airflow and the air to be stirred, thereby drying the dishes. These washing, rinsing,
Drying produces noise, and part of this noise is
2 and other noise passes through the exhaust hole 13 and flows out of the machine.

[0003]

According to the dishwasher / dryer constructed as described above, in the washing and rinsing steps, the magnitude of the force with which the washing water 7 jetted from the jet holes 6 of the nozzles 5 impinges on the tableware 3. Is proportional to the density of the washing water, the flow rate of the jet, and the speed of the jet. The greater the collision force, the greater the mechanical cleaning power and the better the cleaning performance. On the other hand, if the collision force is increased, the cleaning tank 1
As a result, the washing tank 1 is vibrated to increase the noise. As described above, if the collision performance of the cleaning water 7 is increased to increase the cleaning performance, the vibration and the noise of the cleaning tank 1 increase, so that there is a problem that the cleaning performance and the noise are contradictory.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and suppresses the vibration generated when the washing water collides with the washing tank without deteriorating the washing performance, and reduces the noise from the washing tank. It is an object of the present invention to obtain a dishwasher that can suppress noise and achieve low noise.

[0005]

SUMMARY OF THE INVENTION The present invention provides a cleaning nozzle for injecting cleaning water, a cleaning pump for pressurizing the cleaning water, a heating element for heating the cleaning water and air, a blower for blowing air into the machine, A dishwasher / dryer provided with a freely opening and closing door and the like in a washing tank, wherein the opening and closing door has a hollow structure having a space between an outer door and an inner door. Further, the opening / closing door is formed in an arc shape having a hollow structure having a space between the outer door and the inner door.

Further, a space between the outer door and the inner door of the opening / closing door is filled with a sound absorbing material. In addition, a damping material was attached to the surface of the opening / closing door on the space side of the external door or the internal door. The space between the outer door and the inner door of the opening / closing door was filled with a sound absorbing material, and the damping material was attached to the surface of the inner door on the space side.

[0007]

[First Embodiment] FIG. 1 is a block diagram of a first embodiment of the present invention, and FIG. 2 is a block diagram of a main part of FIG. In the figure, 1 is a washing tank of a dishwasher, 2 is a water supply valve, 3 is tableware, and 4 is a tableware basket in which the tableware 3 is stored. Reference numeral 5 denotes a nozzle, 6 denotes an injection hole provided in the nozzle 5, 7 denotes cleaning water, 8 denotes a cleaning pump, 9 denotes a heating element, and 10 denotes a filter. A control unit 11 controls each of the steps of washing, rinsing, draining, and drying.

Reference numeral 12 denotes an openable and closable front door mounted on the front surface of the cleaning tank 1, 12a denotes an external door constituting the outside of the front door 12, 12b denotes an internal door constituting the cleaning tank 1 side of the front door 12, and 12c denotes a front door. This is a space provided between the outer door 12a and the inner door 12b. That is, the front door 12 has a hollow double structure including the outer door 12a and the inner door 12b via the space 12c. Reference numeral 13 denotes a plurality of exhaust holes provided in the front door 12, and reference numeral 14 denotes a washing water 7 in the washing and rinsing steps.
Cover that prevents the air from coming out of the exhaust port 13, 15
Is a blower.

The operation of the first embodiment configured as described above will be described. The operation of the dishwasher is such that washing, rinsing, draining, and drying are sequentially performed to wash the dishes 3,
dry. First, the tableware basket 4 in which the tableware 3 is stored is stored in the washing tank 1, and then the detergent is added to start the operation. At the start of operation, first, the water supply valve 2 operates to supply the cleaning water 7 into the cleaning tank 1. Then, the cleaning pump 8 pressurizes the cleaning water 7 supplied to the cleaning tank 1, and the cleaning water 7
Is sprayed toward the tableware 3 from a spray hole 6 provided in a nozzle 5 together with a detergent. The washing water that has collided with the tableware 3 is reflected by the tableware 3 while removing dirt from the tableware 3, and collides again with the inner wall of the cleaning tank 1 and the inner door 12 a of the front door 12 and drops while reducing the speed. In addition, a part of the washing water injected from the nozzle 5 does not hit the tableware 3 and directly collides with the inner wall and the inner door 12 of the washing tank 1. In this cleaning step, the heating element 9 disposed in the cleaning tank 1 is energized to heat the cleaning water 7 to a cleaning set temperature.

When the washing process for a predetermined time is completed, the washing water 7 containing the dirt washed off from the tableware 3 is discharged out of the apparatus by using the washing pump 8 as a driving source. At this time, a switching valve (not shown) for the washing step and the draining step is provided in the circulation path of the washing water 7 of the washing pump 8 to convert the operation. Subsequently, the washing water 7 is newly supplied, and the washing water 7 is jetted again to the tableware 3 from the injection hole 6 provided in the nozzle 5 so as to collide with the tableware 3 on which the dirt is adhered with the detergent or the garbage. And rinse. The washing water 7 that has collided with the tableware 3 is changed in direction by the tableware 3 and collides with the inner wall of the washing tank 1 or the inner door 12 b of the front door 12 while reducing the speed, and accumulates in the washing tank 1. When this rinsing step is completed, the washing water 7 is discharged outside the machine again. This rinsing step is repeated several times continuously. In this rinsing step, the residual vegetables are collected in the filter 10 provided in the washing tank 1.

As described above, in the washing and rinsing steps, the washing water 7 collides with the tableware 3, and a part of the washing water 7 after colliding with the tableware 3 is reflected by the tableware 3 and is washed by the washing tank 1 and the front surface. Door 12
And then falls into the cleaning tank 1. In addition, a part of the washing water 7 sprayed from the nozzle 5 does not hit the tableware 3 but directly enters the inner wall of the washing tank 1 or the inner door 12b.
Collide with Thus, the washing tank 1 and the front door 12 collide with the washing water 7 and are excited to vibrate, and this vibration generates washing noise.

When the rinsing step is completed, the heating element 9 is energized to start a drying step for drying the tableware 3. In this step, the air outside the device is sent to the heating element 9 by the blower 15 and heated. The heated air is supplied into the washing tank 1 to dry the tableware 3 and is discharged out of the machine through a plurality of exhaust holes 13 provided in the washing tank 1. As described above, in the drying step, air is blown in from outside the machine by operating the blower 15, heated, heated, and blown onto the tableware 3. At this time,
Airflow noise is generated by the blower fan of the blower 15,
Drying noise is generated due to the stirring of the air. When this drying step is completed, the operation of the dishwasher is completed.

As described above, the washing, rinsing, and drying processes generate a washing sound and a drying sound in the washing tank 1.
The sound is blocked by the transmission loss TL (Transmission LOSS) of b, then passes through the space 12c, and is finally further blocked by the transmission loss TL of the external door 12a. That is, since the front door 12 is formed in a hollow double structure including the outer door 12a and the inner door 12b, the transmission loss T for sound is reduced.
L can be made larger than one made of a homogeneous material, and the sound insulation performance is improved.

In general, the transmission loss TL (dB) of a homogeneous material
Is TL = 18 · log (f · M) −44, where M is the area density of the material (kg / m ² ) and f (Hz) is the frequency.
Is shown by the following equation. From the above formula, for example, if the plate thickness is doubled, the areal density M is also doubled, so that the transmission loss increases by about 5 dB. For example, when the noise in the cleaning tank 1 is 60 dB,
The front door 12 is made of a homogeneous material having one transmission loss TL of 10 dB.
, The external noise is 50 dB. If the thickness is simply doubled, the noise is improved by 5 dB as described above.
Stays at 5 dB. However, with the hollow double structure, the transmission loss TL of the outer door 12a and the inner door 12b is 10
In dB, a total reduction of 20 dB can be expected, the external noise will be 40 dB, and the hollow noise will be less than simply doubling the plate thickness.
The weight is more silent. As described above, in the present embodiment, the front door 12 is connected to the hollow 2 composed of the outer door 12a and the inner door 12b via the space 12c.
Due to the heavy structure, noise generated in the cleaning tank 1 can be efficiently shielded, and the noise level outside can be reduced to reduce noise.

[Second Embodiment] FIG. 3 is a block diagram of a second embodiment of the present invention, and FIG. 4 is a block diagram of a main part of FIG. In the first embodiment, the front door 12 has a hollow double structure including the outer door 12a and the inner door 12b via the space 12c, but in the present embodiment, the outer door 12a and the inner door 12
The sound absorbing material 16 such as a felt and a sponge is further filled in the space 12c between b. With this configuration, the noise transmitted through the inner door 12b receives the resistance of the sound absorbing material 16 filled in the space 12c and the amount of dissipated energy increases, so that the sound insulation performance of the front door 12 is further improved. . According to the present embodiment, since the noise is effectively absorbed by the sound absorbing material 16, the level of the noise flowing out of the apparatus can be reduced, and the noise can be further reduced.

[Third Embodiment] FIG. 5 is a configuration diagram of a main part of a third embodiment of the present invention. In the first and second embodiments, the noise generated in the cleaning tank 1 is transmitted to the front door 12 having a hollow double structure.
Alternatively, the sound absorbing material 16 filled in the space 12c of the front door 12 is reduced.
A vibration damping material 17 made of a viscoelastic material such as rubber or asphalt is attached to a surface of the inner door 12b that constitutes the surface of the inner door 12b on the space portion 12c side (a surface of the inner door 12a facing the outer door 12b). . By providing the damping material 17 in this manner, the inner door 12 excited by the collision of the cleaning water 7 can be used.
b can be effectively attenuated, and the mass of the damping material 17 is added to the inner door 12b, so that the transmission loss TL increases and the washing noise due to the collision of the washing water 7 is reduced. can do.

[Fourth Embodiment] FIG. 6 is a configuration diagram of a main part of a fourth embodiment of the present invention. In the third embodiment, the damping material 17 is attached to the surface of the inner door 12b on the space portion 12c side, but in the present embodiment, the outer door 1 constituting the front door 12 is attached.
A damping material 17 made of a viscoelastic material such as rubber or asphalt is adhered to a surface of the space 2c on the side of the space 12c (a surface of the outer door 12a facing the inner door 12b). By providing the damping material 17 in this manner, the inner door 12
Vibrations transmitted from b can be effectively attenuated by the damping material 17 of the outer door 12a, and the washing noise can be reduced.

[Fifth Embodiment] FIG. 7 is a configuration diagram of a main part of a fifth embodiment of the present invention. This embodiment has a configuration in which the second embodiment and the third embodiment are combined, and has a space 12 c between the outer door 12 a and the inner door 12 b of the front door 12.
Is filled with a sound absorbing material 16 such as felt or sponge, and a damping material 17 made of a viscoelastic material such as rubber or asphalt is attached to the surface of the inner door 12b on the space 12c side. . With such a configuration, the vibration damping material 17 and the sound absorbing effect of the sound absorbing material 16 are synergistically exhibited, and the cleaning noise can be more effectively reduced.

[Sixth Embodiment] FIG. 8 is a configuration diagram of a sixth embodiment of the present invention. In the present embodiment, the shape of the front door 12 is formed in an arc shape, and the front opening of the cleaning tank 1 is configured to be movable up and down so as to be rotatably opened and closed.
The front door 12 includes an outer door 12a and an inner door 12b in the space 1.
It is a hollow double structure connected via 2c. Other configurations are substantially the same as those in the first embodiment.
Description is omitted.

According to the present embodiment, the cleaning sound generated by the cleaning water 7 in the cleaning tank 1 and the drying sound at the time of drying are as follows.
The sound is blocked by the transmission loss TL of the inner door 12b, then passes through the space 12c, and finally, the transmission loss TL of the outer door 12a.
The sound is further shielded. Further, the vibration of the front door 12 is further reduced by the improvement of the mechanical rigidity of the front door 12 and the dispersion when the washing water 7 collides. Thus, the front door 12
Is formed in an arc shape, the mechanical rigidity can be increased and vibration caused by the collision of the washing water 7 can be reduced as compared with the case of a planar shape, and since the inner door 12b is also in an arc shape, the washing water Since the angle of incidence when colliding with the inner door 12b is dispersed, the collision force of the washing water 7 acting on the inner door 12b is reduced.

In the present embodiment, the arc-shaped front door 12 is connected to the outer door 12a and the inner door 12 via the space 12c.
b, the noise generated in the cleaning tank 1 can be efficiently isolated, and the vibration of the arc-shaped front door 12 is also effectively suppressed, so that the noise is reduced. And reduce noise.

[Seventh Embodiment] FIG. 9 is a configuration diagram of a seventh embodiment of the present invention. In the sixth embodiment, the front door 12 is formed in an arc shape, and has a hollow double structure composed of the outer door 12a and the inner door 12b via the space 12c. In the space 12c between the outer door 12a and the inner door 12b of the front door 12, felt,
It is filled with a sound absorbing material 16 such as a sponge. With this configuration, the noise transmitted through the inner door 12b receives the resistance of the sound absorbing material 16 filled in the space 12c and the amount of dissipated energy increases, so that the sound insulation performance of the front door 12 is further improved. . According to the present embodiment, since the noise is effectively absorbed by the sound absorbing material 12, the level of the noise flowing out of the apparatus can be reduced, and the noise can be further reduced.

[Eighth Embodiment] FIG. 10 is a configuration diagram of a main part of an eighth embodiment of the present invention. In the present embodiment, the space 12c of the inner door 12b constituting the arc-shaped front door 12
A vibration damper 17 made of a viscoelastic material such as rubber or asphalt is attached to the side surface. With this configuration, the vibration of the inner door 12b can be effectively attenuated by the damping material 17, and the cleaning noise can be reduced.

[Ninth Embodiment] FIG. 11 is a configuration diagram of a main part of a ninth embodiment of the present invention. In the present embodiment, contrary to the eighth embodiment, a vibration damping material 17 made of a viscoelastic material such as rubber or asphalt is attached to the surface of the external door 12a on the space 12c side. With this configuration, the vibration transmitted from the inner door 12b can be effectively attenuated by the damping material 17 of the outer door 12a, and the washing noise can be reduced.

[Tenth Embodiment] FIG. 12 is a configuration diagram of a main part of a tenth embodiment of the present invention. The present embodiment is an arc-shaped front door 12 having a configuration obtained by combining the seventh embodiment and the eighth embodiment. In the space 12c between the outer door 12a and the inner door 12b of the front door 12, felt or sponge is used. The sound absorbing material 16 is filled, and the space portion 1 of the inner door 12b is further filled.
A damping material 17 made of a viscoelastic material such as rubber or asphalt is attached to the surface on the side 2c. According to the present embodiment, the vibration damping by the damping material 17 and the sound absorbing material 1
6 can be exhibited more synergistically with the sound absorbing effect of the sound, and the cleaning noise can be reduced more effectively.

[0026]

As is apparent from the above description, the present invention provides a cleaning nozzle for injecting cleaning water, a cleaning pump for pressurizing the cleaning water, a heating element for heating the cleaning water and air, and an air inside the machine. A dishwasher and dryer provided with a blower that sends air into the washing tank and a door that can be opened and closed freely, and the opening and closing door has a hollow structure having a space between an external door and an internal door, so that cleaning noise, The transmission loss of sound waves such as drying noise is larger than that of a door made of a single homogeneous material, and the sound insulation performance is greatly improved. Therefore, the noise level due to the sonic energy can be reduced, and the silent performance as a dishwasher can be improved.

Further, since the opening / closing door is formed in an arc shape having a hollow structure having a space between the outer door and the inner door, mechanical rigidity is increased and vibration is reduced as compared with a flat door. In addition, since the angle of incidence when the cleaning water collides with the internal door is dispersed, the collision force of the cleaning water acting on the internal door is reduced. Further, the sound of washing with washing water and the sound of drying during drying are first blocked by the transmission loss TL of the internal door,
After passing through the space, the sound is finally further shielded by the transmission loss TL of the external door. Further, by improving the mechanical rigidity of the door and dispersing the collision of the washing water, the vibration of the door is reduced, and the noise can be further reduced.

Further, since the sound absorbing material is filled in the space between the outer door and the inner door of the opening / closing door, the noise transmitted through the inner door receives the resistance of the sound absorbing material filled in the space, and the energy dissipation is reduced. And the sound insulation performance of the door is greatly improved. As described above, since the noise is effectively absorbed by the sound absorbing material, the level of the noise flowing out of the apparatus can be reduced, and the noise can be further reduced. In the above case, when the door is formed in an arc shape, the sound insulation performance of the door is further greatly improved by increasing the rigidity of the door, dispersing the washing water, and the sound absorbing effect of the sound absorbing material filled in the space, Further noise reduction can be achieved.

Also, since the damping material is attached to the outer door of the opening / closing door or the space side of the inner door, the vibration of the inner door excited by the collision of the washing water is effectively attenuated by the damping material. Furthermore, since the mass of the damping material is added to the outer door or the inner door, the transmission loss TL increases, and the washing noise caused by the collision of the washing water can be reduced.

The space between the outer door and the inner door of the opening / closing door is filled with a sound absorbing material, and the damping material is attached to the surface of the inner door on the space side. By making the sound absorbing effect of the material synergistic, the washing noise can be reduced more effectively.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a main part of FIG. 1;

FIG. 3 is a configuration diagram of a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a main part of FIG. 3;

FIG. 5 is an explanatory diagram of a main part according to a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of a main part of a fourth embodiment of the present invention.

FIG. 7 is an explanatory diagram of a main part of a fifth embodiment of the present invention.

FIG. 8 is a configuration diagram according to a sixth embodiment of the present invention.

FIG. 9 is a configuration diagram of a seventh embodiment of the present invention.

FIG. 10 is an explanatory diagram of a main part according to an eighth embodiment of the present invention.

FIG. 11 is an explanatory diagram of a main part of a ninth embodiment of the present invention.

FIG. 12 is an explanatory diagram of a main part of a tenth embodiment of the present invention.

FIG. 13 is a configuration diagram illustrating an example of a conventional dishwasher / dryer.

[Explanation of symbols]

1 washing tank, 3 dishes, 5 nozzles, 7 washing water, 8
Cleaning pump, 9 heating elements, 12 front door, 12a external door, 12b internal door, 12c space, 15 blower, 1
6 Sound absorbing materials, 17 damping materials.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroshi Ando 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. (72) Inventor Katsuhiko Ishii 1728-1 Komaeda, Hanazono-cho, Osato-gun, Saitama Mitsubishi Inside Electric Home Equipment Co., Ltd. (72) Inventor Yuya Fukushima 1728-1, Komaeda, Hanazono-cho, Osato-gun, Saitama F-term in Mitsubishi Electric Home Equipment Corporation (reference) 3B082 BB01

Claims (5)

[Claims] 1. A cleaning nozzle for injecting cleaning water, a cleaning pump for pressurizing the cleaning water, a heating element for heating the cleaning water and air, a blower for blowing air into the device, and an opening / closing door that can be freely opened and closed. And the like in a washing tank, wherein the opening / closing door has a hollow structure having a space between an external door and an internal door. 2. The dishwasher / dryer according to claim 1, wherein the opening / closing door has an arc shape having a hollow structure having a space between the outer door and the inner door. 3. The dishwasher / dryer according to claim 1, wherein a sound absorbing material is filled in a space between the outer door and the inner door of the opening / closing door. 4. The dishwasher / dryer according to claim 1, wherein a damping material is attached to a surface of the opening / closing door on the space side of the outer door or the inner door. 5. A sound absorbing material is filled in a space between the outer door and the inner door of the opening / closing door, and a damping material is attached to a surface of the inner door on the space side. Dishwasher and dryer as described.