Disposer

Abstract

To provide a disposer restraining generation of a fine solid constituent contained in slurry.SOLUTION: A disposer 1 comprises: an upper casing and a lower casing 5; a rotation disk 9 arranged in the lower casing 5; a swing hammer 10 swingably pivoted on the rotation disk 9; and anchor teeth 11 fixed in the lower casing 5 and surrounding a periphery of the rotation disk 9. The disposer is configured to: disintegrate kitchen wastes having been thrown into the lower casing 5 from an outside to drop onto the rotation disk 9; and discharge the disintegrated wastes to the outside of the lower casing 5.The disposer 1 further comprises a clearance G between an outer edge of the rotation disk 9 and an inner surface of the lower casing 5. In a state that the swing hammer 10 is swung out toward the lower casing 5, a tip of the swing hammer 10 approaches to the inner surface of the lower casing 5, passing over the outer edge of the rotation disk 9.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a disposer that crushes food waste to produce a slurry. [Background technology]

[0002] A garbage disposer is a device that crushes food waste generated in a kitchen and mixes it with water to produce a slurry. For example, as described in Patent Document 1, a typical garbage disposer has a rotating disk that is disposed inside a casing and rotated by an electric motor, and fixed teeth that are fixed inside the casing and surround the periphery of the rotating disk. A swing hammer is provided on the upper surface of the rotating disk (Fig. 2 in Patent Document 1). Food waste that is thrown into the casing from the sink and falls onto the rotating disk is pinched between the swing hammer and the fixed teeth and crushed. The crushed food waste is mixed with water to form a slurry, which is discharged outside the casing.

[0003] If a garbage disposer is installed in a kitchen, etc., garbage can be promptly discharged into the sewer whenever it is generated, and the kitchen, etc. can be kept clean. However, some municipalities in Japan do not permit the direct discharge of slurry generated by a garbage disposer into the public sewer system, because it is believed that if the slurry is directly discharged into the public sewer system, it may clog the sewer pipes or cause the accumulated garbage to rot, resulting in a foul odor, and may also interfere with sewage treatment. In such municipalities, it is required to install a wastewater treatment device that separates and removes solids from the wastewater containing slurry discharged from the garbage disposer and then discharges it into the sewer system.

[0004] For example, Patent Document 2 discloses a wastewater treatment device including a solid-liquid separation device that separates wastewater containing a slurry discharged from a disposer into a solid component and a liquid component, a composting device that processes the solid component separated from the wastewater in the solid-liquid separation device, and a wastewater treatment tank that processes the liquid component separated from the wastewater in the solid-liquid separation device. The wastewater treatment device described in Patent Document 2 also includes a settling separation tank that settles fine solid components remaining in the liquid component treated in the wastewater treatment tank, and the slurry containing the fine solid components settled in the settling separation tank is sent again to the solid-liquid separation device. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2020-131075 A [Patent Document 2] JP 2002-18472 A Summary of the Invention [Problem to be solved by the invention]

[0006] Originally, a garbage disposer is required to finely crush food waste and reduce the average particle size of the solids contained in the slurry. This is because reducing the average particle size of the solids improves the fluidity of the slurry. And improving the fluidity of the slurry reduces the occurrence of clogging in the drain pipe downstream of the garbage disposer or in the sewer system further downstream of the drain pipe.

[0007] However, when a wastewater treatment device including a solid-liquid separator is provided downstream of a disposer, if the average particle size of the solids contained in the slurry is made smaller than necessary, the amount of solid components that pass through the filter of the solid-liquid separator increases. For example, if the average particle size of the solids contained in the slurry flowing into the wastewater treatment device described in Patent Document 2 is made smaller than necessary, the amount of fine solid components that pass through the filter of the solid-liquid separator and flow into the wastewater treatment tank together with the liquid components increases. The fine solid components that flow into the wastewater treatment tank are collected in a sedimentation tank and sent to the solid-liquid separator again, but since the original particle size is small, most of them pass through the filter of the solid-liquid separator and flow into the wastewater treatment tank again together with the liquid components. As a result, the amount of fine solid components that remain in the sedimentation tank increases. Therefore, the sedimentation tank needs to be frequently cleaned to remove the fine solid components, which causes problems of increased maintenance work and costs.

[0008] The present invention has been made in consideration of the above circumstances, and has an object to provide a disposer in which the generation of fine solid components contained in a slurry is suppressed. [Means for solving the problem]

[0009] The disposer according to the present invention comprises a casing, a rotating disk arranged inside the casing, a swing hammer pivotally supported on the rotating disk so as to be freely swingable, and fixed teeth fixed inside the casing and surrounding the periphery of the rotating disk, and crushes food waste that is thrown into the casing from the outside and falls onto the rotating disk, and discharges it to the outside of the casing. The disposer according to the present invention also comprises a gap between the outer edge of the rotating disk and the inner surface of the casing. Furthermore, when the free end of the swing hammer is swung out toward the casing, the free end of the swing hammer passes over the outer edge of the rotating disk and approaches the inner surface of the casing.

[0010] The size of the gap between the outer edge of the rotating disc and the inner surface of the casing may be between 5mm and 9mm.

[0011] The disposer according to the present invention may be provided with a plurality of bypass holes drilled in the rotating disk and arranged on a circumference with the center of rotation of the rotating disk as the center of the circle.

[0012] The rotary disc may have a plurality of sets of bypass holes arranged on a circumference of a circle whose center is the center of rotation of the rotary disc, and the sets of bypass holes may be arranged concentrically.

[0013] The bypass hole may be an elongated hole curved along a circumference on which a plurality of bypass holes including the bypass hole are arranged.

[0014] The bypass hole may be an elongated hole whose longitudinal direction is a direction perpendicular to the radius of the rotating disk that passes through the center of the bypass hole.

[0015] The disposer may be provided with a control means for alternating forward and reverse rotation of the rotating disc.

[0016] The control means may rotate the rotary disk in a fixed direction after alternately rotating the rotary disk in a forward direction and a reverse direction.

[0017] The disposer may be provided with a control means for alternating low and high speed rotation of the rotating disc.

[0018] The control means may be a means for increasing the rotation speed of the rotating disk in a stepwise manner each time the rotating disk is rotated at high speed.

[0019] The disposer may be provided with a control means for rotating the rotating disk at a low speed for a fixed period of time from start-up, then gradually increasing the rotation speed of the rotating disk over a fixed period of time, and thereafter rotating the rotating disk at a high speed at a fixed speed.

[0020] The disposer may be provided with a control means which rotates the rotating disk at an intermediate speed for a fixed period of time from start-up, rotates the rotating disk at a low speed for a fixed period of time thereafter, gradually increases the rotational speed of the rotating disk over a fixed period of time, and then rotates the rotating disk at a high constant speed. Effect of the Invention

[0021] According to the present invention, a gap is formed between the outer edge of the rotating disk and the inner surface of the casing, so that solid objects with small external dimensions, such as rice grains and used tea leaves, among the kitchen waste put into the disposer, pass through the gap and fall below the rotating disk. Therefore, the solid objects with small external dimensions are not pinched and crushed between the fixed teeth and the swing hammer, so that the solid objects, which are originally small in external dimensions, are prevented from being further crushed and turned into fine particles.

[0022] According to the present invention, the rotating disk of the disposer is provided with a plurality of bypass holes, and the bypass holes are arranged on a circumference with the center of rotation of the rotating disk as the center of the circle, so that small solids contained in the garbage put into the disposer, such as rice grains and used tea leaves, pass through the bypass holes and fall below the rotating disk before reaching the fixed teeth. In other words, small solids bypass the gap between the fixed teeth and the swing hammer and fall below the rotating disk. Therefore, solids that are originally small in external dimensions are not crushed between the fixed teeth and the swing hammer and are not granulated.

[0023] In addition, among the solid matters contained in the kitchen waste, those with large external dimensions, such as pieces of vegetables or fruits or chicken bones, cannot pass through the gaps and bypass holes and are therefore pinched between the fixed teeth and the swing hammer and crushed.

[0024] Therefore, the generation of fine solid components in the slurry is suppressed, so that when a wastewater treatment device including a solid-liquid separator and a settling tank is provided downstream of the disposer, the amount of solid particles that slip through the solid-liquid separator is reduced. As a result, the frequency of cleaning the settling tank can be reduced, thereby reducing the effort and cost required for maintaining the wastewater treatment device. [Brief description of the drawings]

[0025] [Figure 1] 1 is a vertical cross-sectional view of a disposer according to an embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view of the disposer shown in FIG. 1 taken along the plane indicated by line AA' in FIG. [Diagram 3] 3 is an enlarged plan view showing one of the bypass holes provided in the rotating disk shown in FIG. 2. [Figure 4] 4 is a plan view showing another example of a bypass hole in accordance with FIG. 3. FIG. [Diagram 5] FIG. 3 is a diagram showing the configuration of a disposer according to a modified example, following FIG. 2. [Figure 6] 1A is a diagram showing a first operation pattern of the disposer, and FIG. 1B is a diagram showing a second operation pattern of the disposer 1. FIG. [Figure 7] 13A is a diagram showing a third operation pattern of the disposer, and FIG. 13B is a diagram showing a fourth operation pattern of the disposer 1. FIG. [Figure 8] 13A is a diagram showing a fifth operation pattern of the disposer, and FIG. 13B is a diagram showing a sixth operation pattern of the disposer 1. FIG. [Figure 9] 13 is a diagram showing the seventh operating pattern of the disposer 1. [Figure 10] 13A is a diagram showing an eighth operation pattern of the disposer, and FIG. 13B is a diagram showing a ninth operation pattern of the disposer 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wastewater treatment device according to an embodiment of the present invention will now be described in detail with reference to the drawings. In the drawings, the same or equivalent parts are designated by the same reference numerals.

[0027] [Overall configuration] FIG. 1 is a vertical cross-sectional view showing the configuration of a disposer 1 according to an embodiment of the present invention. As shown in FIG. 1, the disposer 1 is provided with an upper casing 4 fixed to the bottom surface of a sink 3 via a joint pipe 2, and a lower casing 5 fixed to the bottom surface of the upper casing 4. The entire structure obtained by joining the upper casing 4 to the lower casing 5 corresponds to the "casing" of the present invention. In this embodiment, the area surrounded by the upper casing 4 and the lower casing 5 corresponds to the "inside of the casing". The remaining area excluding the area surrounded by the upper casing 4 and the lower casing 5 from all the areas shown in the figure corresponds to the "outside of the casing".

[0028] As shown in FIG. 1, an electric motor 6 is disposed below the lower casing 5, and a housing 7 of the electric motor 6 is fixed to the lower casing 5. The lower casing 5 also serves as a load-side bracket for the electric motor 6, and an output shaft 8 of the electric motor 6 penetrates the lower casing 5 and protrudes above the lower casing 5, that is, into the inside of the casing. A rotating disk 9 is disposed inside the casing. The rotating disk 9 is connected to the output shaft 8 of the electric motor 6, and is driven to rotate around the X1 axis by the electric motor 6. Two swing hammers 10 are supported on the rotating disk 9. The two swing hammers 10 swing around the X2 and X3 axes, respectively. Fixed teeth 11 are fixed to the lower casing 5. The fixed teeth 11 are disposed on a circumference surrounding the rotating disk 9.

[0029] As shown in Fig. 1, the disposer 1 is equipped with a control computer 12. The control computer 12 is a device that operates the disposer 1 according to the operation of an operation switch (not shown) and the procedure described in a control program installed in the control computer 12. The control computer 12 is an example of the control means of the present invention.

[0030] Since the disposer 1 is configured as described above, when food waste and water (not shown) are thrown into the inside of the casing from the sink 3, the food waste and water fall onto the rotating disk 9. The food waste and water that fall onto the rotating disk 9 spread out horizontally and move toward the outer edge of the rotating disk 9. Food waste that reaches the outer edge of the rotating disk 9 is pushed by the swing hammer 10 and is pinched between the swing hammer 10 and the fixed teeth 11 and crushed. The crushed food waste falls below the rotating disk 9 and is discharged to the outside of the casing through the discharge port 13.

[0031] FIG. 2 is a cross-sectional view of the disposer 1 cut along the plane indicated by the line A-A' in FIG. 1. As shown in FIG. 2, the rotary disk 9 is provided with bypass holes 14. In this embodiment, ten bypass holes 14 are arranged in an annular shape on a circumference centered on the center of rotation of the rotary disk 9. In addition, in the plan view shown in FIG. 2, the bypass holes 14 are curved along the circumferential direction in which the ten bypass holes 14 are arranged, and the circumferential direction is the longitudinal direction. In other words, in the plan view shown in FIG. 2, the bypass holes 14 are arc-shaped long holes curved along an arc centered on the center of rotation of the rotary disk 9.

[0032] Furthermore, when the rotating disk 9 rotates, centrifugal force acts on the swing hammer 10. When centrifugal force acts on the swing hammer 10, the swing hammer 10 rotates around the X2 and X3 axes (not shown in FIG. 2), and the free end 10f of the swing hammer 10 is swung out toward the lower casing 5. Furthermore, the length from the X2 and X3 axes to the free end 10f of the swing hammer 10 is longer than the length from the X2 and X3 axes to the outer edge of the rotating disk 9. Therefore, when the free end 10f of the swing hammer 10 is swung out toward the lower casing 5, the free end 10f of the swing hammer 10 moves to the position shown in FIG. 2. In other words, the free end 10f of the swing hammer 10 moves beyond the outer edge of the rotating disk 9 to a position approaching the inner surface of the lower casing 5.

[0033] As shown in FIG. 2, a gap G is formed between the outer edge of the rotating disk 9 and the inner surface of the lower casing 5. Because of the gap G, solid objects whose outer dimensions are smaller than the gap G, such as rice grains and used tea leaves, fall through the gap G to the bottom of the rotating disk 9, among the garbage that is put into the disposer 1, falls onto the rotating disk 9, and reaches the outer edge of the rotating disk 9. Therefore, solid objects smaller than the gap G are not pinched between the fixed teeth 11 and the swing hammer 10 and crushed, so that solid objects whose outer dimensions are originally small are suppressed from being further crushed and becoming finer. On the other hand, solid objects whose outer dimensions are larger than the gap G, such as pieces of vegetables or fruits or chicken bones, are pinched between the fixed teeth 11 and the swing hammer 10 and crushed. The size of the gap G is not particularly limited, but according to the inventor's experiments, good results were obtained when the size of the gap G was selected between 5 mm and 9 mm.

[0034] In addition, the disposer 1 has a bypass hole 14 on the rotating disk 9, so that solid objects with small external dimensions, such as rice grains and used tea leaves, contained in the garbage that is put into the disposer 1 and falls onto the rotating disk 9, pass through the bypass hole 14 and fall below the rotating disk 9 before reaching the fixed teeth 11. In other words, solid objects with small external dimensions bypass the fixed teeth 11. Therefore, solid objects with small external dimensions are not pinched between the fixed teeth 11 and the swing hammer 10 and crushed, so that solid objects that are originally small in external dimensions are further crushed and are suppressed from being broken down into fine particles. As a result, the solid particles contained in the slurry generated by the disposer 1 are suppressed from being broken down into fine particles.

[0035] When a wastewater treatment device including a solid-liquid separator and a settling tank is provided downstream of the disposer 1, suppressing the fine graining of the solid particles contained in the slurry generated by the disposer 1 reduces the amount of solid particles that slip through the solid-liquid separator. Reducing the amount of solid particles that slip through the solid-liquid separator reduces the amount of solid particles that accumulate in the settling tank. As a result, the frequency of cleaning the settling tank can be reduced.

[0036] FIG. 3 is an enlarged plan view of one of the bypass holes 14. As shown in FIG. 3, the arc length of the bypass hole 14 is 32 mm, and the width is 9 mm. In this embodiment, good results were obtained by setting the dimensions of the bypass hole 14 as described above. However, the dimensions of the bypass hole 14 are not limited to the values ​​described above. The dimensions of the bypass hole 14 can be selected arbitrarily. However, if the width of the bypass hole 14 is made large, hard large objects such as cut pieces of vegetables or fruits or chicken bones contained in the kitchen waste are likely to get caught in the bypass hole 14, causing clogging. Therefore, it is preferable that the width of the bypass hole 14 is 9 mm or less.

[0037] The shape of the bypass hole 14 may be a rectangular long hole whose longitudinal direction is perpendicular to the radius R of the rotating disk 9 (not shown in FIG. 4) that passes through the center C of the bypass hole 14, as shown in Fig. 4. In an experiment conducted by the inventor, good results were obtained by making the planar shape of the bypass hole 14 rectangular.

[0038] However, the planar shape of the bypass hole 14 is not limited to that shown in Figure 3 or Figure 4. The planar shape of the bypass hole 14 may be a circle, a regular hexagon, a square, or other shape. If the planar shape of the bypass hole 14 is as described above, although it is not optimal, the generation of fine solid components contained in the slurry generated by the disposer 1 is suppressed.

[0039] [Variations] Fig. 5 is a diagram showing the configuration of the disposer 1 according to the modified example, following Fig. 2. As shown in Fig. 5, inside a set of 10 bypass holes 14 arranged on a circumference centered on the rotation center of the rotating disk 9, a set of 8 bypass holes 14 arranged on a circumference centered on the rotation center of the rotating disk 9 may be provided, and further inside that, another set of 8 bypass holes 14 may be provided, and further inside that, a set of 4 bypass holes 14 may be provided. In other words, a plurality of sets of a plurality of bypass holes 14 arranged on a circumference centered on the rotation center of the rotating disk 9 may be provided and arranged concentrically with each other.

[0040] In this way, by providing a large number of bypass holes 14 on the rotating disk 9, a larger number of solid objects with smaller external dimensions bypass the fixed teeth 11, thereby more effectively suppressing the granulation of solid particles contained in the slurry generated by the disposer 1.

[0041] [Driving pattern] As described above, in the disposer 1, the electric motor 6 is controlled by the control computer 12. Therefore, in the disposer 1, the rotation speed and direction of the rotating disk 9 can be changed as desired as necessary. For example, by changing the rotation direction and speed of the rotating disk 9 according to the various operating patterns shown below, it is possible to more effectively suppress the granulation of solid particles contained in the slurry generated by the disposer 1. The operating patterns described below are written in a program that is pre-installed in the control computer 12. The operating patterns described below are realized by the control computer 12 reading and executing the program.

[0042] Figures 6(A) to 10(B) are diagrams showing various operation patterns of the disposer 1. In Figures 6(A) to 10(B), the horizontal axis indicates the passage of time, and the vertical axis indicates the rotation speed of the rotating disk 9. In addition, in the following, forward rotation refers to the counterclockwise rotation of the rotating disk 9 in Figures 2 and 5, and reverse rotation refers to the clockwise rotation of the rotating disk 9.

[0043] [First driving pattern] As shown in Fig. 6(A), in the first operation pattern, the rotating disk 9 alternates between forward and reverse rotations for a total of 20 times during the period from start-up until 20 seconds have elapsed. Then, for the next 40 seconds, the rotating disk 9 rotates forward at a constant rotation speed. By alternately rotating forward and reverse, the discharge of solid objects with small external dimensions contained in the garbage on the rotating disk 9 through the bypass holes 14 is promoted.

[0044] [Second driving pattern] The second operating pattern is a variation of the first operating pattern, and is characterized in that, as shown in FIG. 6(B), during the period from start-up until 20 seconds have elapsed, the rotating disk 9 alternates between forward and reverse rotation a total of 20 times, then during the next 12 seconds, the rotating disk 9 alternates between forward and reverse rotation a total of 6 times, and then during the next 12 seconds, the rotating disk 9 alternates between forward and reverse rotation a total of 4 times.

[0045] [Third driving pattern] The third operation pattern is also a modification of the first operation pattern, and as shown in FIG. 7(A), the rotating disk 9 alternates between forward and reverse rotations a total of 20 times for 10 seconds after starting, and then rotates forward for 3 seconds. After that, the rotating disk 9 alternates between forward and reverse rotations a total of 16 times for 8 seconds, and then rotates forward for 5 seconds. After that, the rotating disk 9 alternates between forward and reverse rotations a total of 5 times for 5 seconds, and then rotates forward for 7 seconds. Then, after the rotating disk 9 alternates between forward and reverse rotations a total of 5 times for 5 seconds, the rotating disk 9 rotates forward for 17 to 27 seconds.

[0046] [Fourth driving pattern] The fourth operation pattern is a modification of the third operation pattern, and as shown in FIG. 7B, the rotating disk 9 alternates between forward and reverse rotations a total of 20 times for 10 seconds after starting, and then rotates forward for 3 seconds. After that, the rotating disk 9 alternates between forward and reverse rotations a total of 16 times for 8 seconds, and then rotates reverse for 5 seconds. After that, the rotating disk 9 alternates between forward and reverse rotations a total of 5 times for 5 seconds, and then rotates forward for 7 seconds. Then, after the rotating disk 9 alternates between forward and reverse rotations a total of 5 times for 5 seconds, the rotating disk 9 rotates reverse for 17 to 27 seconds.

[0047] The third and fourth operation patterns are common in that the rotating disk 9 is rotated in a constant direction after alternately rotating in a forward direction and a reverse direction. Here, "rotating in a constant direction" means "rotating in the same direction without alternating between directions of rotation." In the third operation pattern, "rotating in a constant direction" means "rotating in a forward direction," whereas in the fourth operation pattern, "rotating in a constant direction" means "rotating in a reverse direction."

[0048] [5th ​​driving pattern] The fifth operation pattern is a modification of the third or fourth operation pattern, and has a basic pattern in which the rotating disk 9 alternates between forward and reverse rotations a total of six times within six seconds. As shown in FIG. 8(A), the fifth operation pattern repeats the basic pattern six times. The fifth operation pattern is characterized in that the rotating disk 9 rotates forward for 1.5 seconds between one basic pattern and the next. The fifth operation pattern is characterized in that the rotating disk 9 rotates forward continuously for the final 9.5 seconds.

[0049] [6th driving pattern] The sixth operation pattern is characterized in that the rotating disk 9 is always rotated in the forward direction, and the rotation speed is periodically changed to alternate between low-speed rotation and high-speed rotation. In the sixth operation pattern, as shown in FIG. 8(B), the rotating disk 9 is rotated in the forward direction at 500 rpm for 8 seconds from the start. After that, the rotating disk 9 is rotated in the forward direction at 1500 rpm for 3 seconds, then the rotating disk 9 is rotated in the forward direction at 500 rpm for 5 seconds, and then the rotating disk 9 is rotated in the forward direction at 1500 rpm for 4 seconds. After that, the rotating disk 9 alternates between rotating in the forward direction at 500 rpm for 5 seconds and rotating in the forward direction at 1500 rpm for 5 seconds three times each, for a total of six times. Then, the rotating disk 9 is rotated in the forward direction at 500 rpm for 5 seconds, and then rotated in the forward direction at 2000 rpm for 5 seconds. That is, the rotating disk 9 alternates between a low-speed forward rotation of 500 rpm and a high-speed forward rotation of 1500 rpm or 2000 rpm six times each, for a total of 12 times.

[0050] According to the sixth operation pattern, while the rotating disk 9 rotates forward at 500 rpm, solid matter with small external dimensions contained in the kitchen waste, such as rice grains and used tea leaves, passes through the bypass holes 14 and falls below the rotating disk 9. On the other hand, soft solid matter with large external dimensions, such as vegetable scraps or fruit scraps, is pinched between the fixed teeth and the swing hammer and crushed. While the rotating disk 9 rotates forward at 1500 rpm, hard objects, such as chicken bones, among the solid matter contained in the kitchen waste can be crushed.

[0051] According to the sixth operation pattern, the rotating disk 9 is first rotated slowly, i.e., at 500 rpm, to reduce the mass of food waste on the rotating disk 9, and then the rotating disk 9 is rotated at high speed, i.e., at 1500 rpm, so that the generation of noise and vibration can be reduced compared to when the rotating disk 9 is rotated at high speed from the beginning. In addition, by alternately rotating at low and high speeds, the amount of slurry generated can be leveled out. Therefore, clogging of the piping caused by a large amount of slurry being generated in a short time due to high speed rotation can be suppressed.

[0052] [7th driving pattern] The seventh operation pattern is a modified example of the sixth operation pattern. In the seventh operation pattern, as shown in FIG. 9, the rotating disk 9 is rotated forward at 300 rpm for 15 seconds after starting. After that, the rotating disk 9 is rotated forward at 700 rpm for 10 seconds, then the rotating disk 9 is rotated forward at 300 rpm for 10 seconds, and furthermore, the rotating disk 9 is rotated forward at 1100 rpm for 8 seconds. After that, the rotating disk 9 is rotated forward at 300 rpm for 10 seconds, and furthermore, the rotating disk 9 is rotated forward at 1500 rpm for 10 seconds. In this way, in the seventh operation pattern, the low-speed forward rotation at 300 rpm and the high-speed forward rotation at 700 rpm to 1500 rpm are alternately repeated. And, each time the high-speed rotation is repeated, the rotation speed during the high-speed rotation is increased stepwise. In other words, the rotation speed during the first high-speed rotation is 700 rpm, the rotation speed during the second high-speed rotation is 1100 rpm, and the rotation speed during the third high-speed rotation is 1500 rpm.

[0053] In the seventh operation pattern, the amount of slurry generated can be leveled out by alternating low-speed and high-speed rotations. This can prevent a large amount of slurry from being generated in a short time by high-speed rotation, which can result in clogging of the piping. In addition, the rotation speed during high-speed rotation is increased stepwise each time the mass of food waste on the rotating disk 9 decreases as a result of high-speed rotation, so that an increase in the load on the motor 6 can be prevented.

[0054] [8th driving pattern] The eighth operation pattern is characterized in that the rotating disk 9 is rotated at a low speed for a fixed time from the start, then the rotation speed of the rotating disk 9 is gradually increased over a fixed time, and thereafter the rotating disk 9 is rotated at a high speed at a fixed speed. In the eighth operation pattern, as shown in Fig. 10(A), the rotating disk 9 is rotated forward at 300 rpm for 20 seconds from the start. Over the next 30 seconds, the rotation speed of the rotating disk 9 is gradually increased to reach 1500 rpm. After that, the rotating disk 9 maintains the rotation speed of 1500 rpm.

[0055] In the eighth operating pattern, after continuing low-speed rotation for a certain period of time, the rotation speed of the rotating disc 9 is gradually increased while the crushing process continues. Therefore, since the rotation speed of the rotating disc 9 is gradually increased while the crushing process continues, a sudden increase in the load on the motor 6 can be suppressed.

[0056] [9th driving pattern] The ninth operation pattern is a modified example of the eighth operation pattern. The ninth operation pattern is characterized in that, prior to the low-speed rotation of the rotating disk 9 in the eighth operation pattern, the rotating disk 9 is rotated at an intermediate speed for a certain period of time from the start. In the ninth operation pattern, after the rotating disk 9 is rotated at an intermediate speed, the rotating disk 9 is rotated at a low speed for a certain period of time, and then the rotation speed of the rotating disk 9 is gradually increased over a certain period of time, and then the rotating disk 9 is rotated at a high speed at a constant speed. In the ninth operation pattern, as shown in FIG. 10(B), the rotating disk 9 is rotated forward at 700 rpm for 2 seconds from the start. For the next 18 seconds, that is, for the next 20 seconds from the start, the rotating disk 9 is rotated forward at 300 rpm. For the next 30 seconds, the rotation speed of the rotating disk 9 is gradually increased to reach 1500 rpm. After that, the rotating disk 9 maintains the rotation speed of 1500 rpm.

[0057] In the ninth operation pattern, after continuing low-speed rotation for a certain period of time, the rotation speed of the rotating disk 9 is gradually increased while continuing the crushing process, so that it is possible to suppress a sudden increase in the load on the motor 6. Moreover, in the ninth operation pattern, the rotating disk 9 is rotated at an intermediate speed prior to the low-speed rotation, so that the amount of food waste on the rotating disk 9 is reduced in the early stage of the crushing process, and the movement of the food waste on the rotating disk 9 thereafter can be made smoother.

[0058] As described above, in the disposer 1 according to this embodiment, solids with small external dimensions are not ground into fine particles, so the generation of fine solid components contained in the slurry is suppressed. As a result, when a wastewater treatment device including a solid-liquid separator is provided downstream of the disposer 1, the amount of fine solids that slip through the solid-liquid separator can be reduced. By reducing the amount of fine solids that slip through the solid-liquid separator, maintenance of the wastewater treatment device becomes easier.

[0059] However, the technical scope of the present invention is not limited to the above-mentioned embodiment, and the present invention can be freely applied, modified, or improved within the scope of the technical ideas shown in the claims.

[0060] For example, the mechanical configuration of the disposer according to the present invention, including the size, shape, and arrangement of the bypass hole, is not limited to the above embodiment. The size, shape, and arrangement of the bypass hole can be changed as necessary.

[0061] In the above, the lower surface of the rotating disk 9 and the lower ends of the fixed teeth 11 are disposed at approximately the same level, but the upper surface of the rotating disk 9 may be disposed at a lower position than the lower ends of the fixed teeth 11. If this arrangement is selected, the rotating disk 9 will not interfere with the fixed teeth 11 even if the gap G is made small.

[0062] The operation patterns of the disposer according to the present invention are not limited to the above operation patterns 1 to 9. The operation pattern of the disposer according to the present invention can be arbitrarily selected according to the needs.

[0063] In the present invention, "high-speed rotation" refers to a state in which the rotating disk 9 rotates in a range of rotation speeds that are considered to be relatively high in a specific operating pattern. "Low-speed rotation" refers to a state in which the rotating disk 9 rotates in a range of rotation speeds that are considered to be relatively low in a specific operating pattern. "Intermediate-speed rotation" refers to a state in which the rotating disk 9 rotates at a speed intermediate between "high-speed rotation" and "low-speed rotation."

[0064] In the seventh operation pattern, 700 rpm is defined as "high speed", whereas in the ninth operation pattern, 700 rpm is defined as "medium speed". In this way, "high speed", "low speed" and "medium speed" in the present invention are determined relatively in a specific operation pattern, and are not determined based on a specific rotation speed.

[0065] In the above description, the counterclockwise rotation of the rotating disk 9 when viewed from above is called forward rotation, and the clockwise rotation of the rotating disk 9 is called reverse rotation, but the definitions of forward and reverse rotation are not limited to this. An operation pattern may be defined by defining clockwise rotation as forward rotation and counterclockwise rotation as reverse rotation.

[0066] This application is based on Japanese Patent Application No. 2023-132843, filed on August 17, 2023. The entire specification, claims, and drawings of Japanese Patent Application No. 2023-132843 are incorporated herein by reference. [Explanation of symbols]

[0067] 1 disposer, 2 joint pipe, 3 sink, 4 upper casing, 5 lower casing, 6 electric motor, 7 housing, 8 output shaft, 9 rotating disk, 10 swing hammer, 10f free end, 11 fixed teeth, 12 control computer, 13 discharge port, 14 bypass hole, G gap, X1, X2, X3 shaft

Claims

1. A casing; A rotating disk disposed inside the casing; a swing hammer pivotally supported relative to the rotary disk; and fixed teeth fixed to the inside of the casing and surrounding the periphery of the rotating disk, A disposer which crushes food waste that is thrown into the inside of the casing from the outside and falls onto the rotating disk, and discharges the food waste to the outside of the casing, a gap is provided between the outer edge of the rotating disk and the inner surface of the casing, and when the free end of the swing hammer is swung toward the casing, the free end of the swing hammer goes beyond the outer edge of the rotating disk and approaches the inner surface of the casing; Disposer.

2. The size of the gap between the outer edge of the rotating disk and the inner surface of the casing is between 5 mm and 9 mm. The disposer of claim 1.

3. a plurality of bypass holes are provided in the rotary disk and arranged on a circumference with the center of rotation of the rotary disk as the center of the circle; The disposer of claim 1.

4. a plurality of sets of the bypass holes arranged on a circumference having a center of rotation of the rotary disk as a center of the circle; The sets of bypass holes are arranged concentrically. The disposer of claim 3.

5. The bypass hole is a long hole curved along a circumference on which a plurality of the bypass holes including the bypass hole are arranged. The disposer of claim 3.

6. The bypass hole is an elongated hole whose longitudinal direction is a direction perpendicular to the radius of the rotating disk that passes through the center of the bypass hole. The disposer of claim 3.

7. A control means is provided for alternately repeating forward and reverse rotation of the rotary disk. A disposer according to any one of claims 1 to 6.

8. the control means causes the rotating disk to alternately rotate in a forward direction and a reverse direction, and then causes the rotating disk to rotate in a fixed direction; The disposer of claim 7.

9. A control means is provided for alternately repeating low-speed rotation and high-speed rotation of the rotating disk. A disposer according to any one of claims 1 to 6.

10. The control means The rotation speed of the rotating disk is increased stepwise each time the high-speed rotation is repeated. The disposer of claim 9.

11. A control means is provided for rotating the rotating disk at a low speed for a certain period of time from the start of the engine, gradually increasing the rotation speed of the rotating disk over a certain period of time, and then rotating the rotating disk at a high speed at a constant speed. A disposer according to any one of claims 1 to 6.

12. a control means for rotating the rotating disk at an intermediate speed for a fixed time from the start, rotating the rotating disk at a low speed for a fixed time thereafter, gradually increasing the rotation speed of the rotating disk over a fixed time, and then rotating the rotating disk at a high speed at a fixed speed; A disposer according to any one of claims 1 to 6.

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