JP2008173112A - Vegetable washing apparatus, and vegetable washing and draining method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vegetable washing apparatus performing washing and draining in a single outer tank. <P>SOLUTION: This vegetable washing apparatus is composed of an outer tank 2, a water passing drainage tank 3 which is rotatably disposed in the outer tank, a water passing basket container 8 which is detachably set in the dehydration tank and holds vegetables to be washed, a water receiving tank 6 which stores water from the outer tank 2, a delivery pipe 63 which is connected to a pump 62 and delivers water in the water receiving tank 6, cleaned through a filter 61 to the outer tank 2, and a water storage tank 4 which is disposed at a position a place higher than the outer tank 2 and releases inside water with self-weight to the outer tank 2 or the water receiving tank 6. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cleaning apparatus and a cleaning and dehydrating method for efficiently cleaning and dewatering vegetables.

  The applicant previously provided a loading station, a washing station, a rinsing station, and a discharging station at 90 ° intervals surrounding the lifting / lowering table, and the lifting / lowering table can be attached and detached with four baskets at 90 ° intervals in the rotation direction. A vegetable washing apparatus was proposed in which a water tank for sinking a straw container and a stirring blade for stirring the water in the water tank were arranged in the washing station and the rinsing station, respectively (Patent Document 1).

  The said washing | cleaning apparatus immerses a basket container in two water tanks in order by intermittent rotation and raising / lowering of a rotary raising / lowering table, and stirs the water of a tank with a stirring body, and wash | cleans vegetables.

JP 2006-20628 A

However, since the cleaning apparatus requires four stations for transferring the soot container, the apparatus becomes large and expensive. Moreover, a large installation space is required. Furthermore, the dehydration of the vegetables after washing must be carried out by a dehydration apparatus that is separate from the washing apparatus, which requires time and effort for transferring the basket container to the dehydration apparatus, and the space and cost for installing the dehydration apparatus. Take it.
This invention clarifies the vegetable washing apparatus which can solve the said problem by enabling washing | cleaning and dehydration of vegetables in one outer tank.

  The washing apparatus according to claim 1 comprises: an outer tub (2); a water-permeable dehydration tub (3) rotatably disposed in the outer tub; and a vegetable to be detachably set in the dehydration tub. A water receiving tank (6) that circulates water between the water-permeable dredged container (8) to be accommodated and the outer tank (2), and a water receiving tank that is connected to the pump (62) and purified through the filter (61). A discharge pipe (63) for discharging the water of (6) to the outer tank (2) and a water storage tank (4) that can store water and supply it to the outer tank (2) when necessary.

  Claim 2 is the vegetable washing apparatus according to claim 1, wherein the water in the water storage tank (3) is discharged to the water receiving tank (6), and the water in the water receiving tank (6) is stored in the water storage tank (3) by the pump (62). The water received from the outer tank (2) is received by the water receiving tank (6), and the water is circulated between the water receiving tank (6) and the outer tank (2).

  A third aspect of the present invention is the vegetable washing apparatus according to the first or second aspect, wherein a cover lid (12) is placed over the outer tub (2), and the discharge lid (6) from the water receiving tub (6) is placed on the cover lid (12). 63) are connected.

  The fourth aspect of the present invention is the vegetable washing apparatus according to the first aspect, wherein the water storage tank (4) is arranged at a higher position than the outer tank (2) and the water receiving tank (6), and the internal water is opened by opening the valve (46). Can be released into the outer tank (2) or the water receiving tank (6) by its own weight.

  A fifth aspect of the present invention is the vegetable washing apparatus according to any one of the first to fourth aspects, wherein the dehydrating tub (3) has a lid (5) covering the basket container (8) that can be opened and closed and locked in the closed position. The lid (5) is provided with an opening (52) for pouring water into the jar (8).

  A sixth aspect of the present invention is the vegetable washing apparatus according to any one of the first to fifth aspects, wherein a short cylindrical wall (53) projects upward at the opening edge of the lid (5).

  A seventh aspect of the present invention is the vegetable washing apparatus according to any one of the first to sixth aspects, wherein the water storage tank (4) comprises a fresh water tank (41) and a sterilization water tank (42), each having a discharge valve ( 45) and 46), the fresh water tank 41 stores fresh water such as tap water, and the sterilization water tank 42 stores sterilizing water such as hypochlorous acid water.

  Claim 8 is the vegetable washing apparatus according to any one of claims 1 to 7, wherein a cover lid (12) covering the upper surface opening of the outer tub (2) is provided so as to be openable and closable. The rotation of (3) stops.

  The method for washing and dehydrating vegetables according to claim 9 uses the vegetable washing apparatus according to any one of claims 1 to 8, and sets the straw container (8) containing vegetables in the dehydration tank (3) for washing. In the process, the water in the water receiving tank (6) is pressurized by the pump (62) while rotating the dehydrating tank (3) at a low speed and discharged into the dredger container (8), and the water receiving tank (6) is released. In the dehydration process, the water in the outer tub (2) is drained and the dehydration tub (3) is rotated at a high speed, and the water adhering to the vegetables is spun off by centrifugal force for dehydration.

  The washing apparatus according to claim 1 pumps the water in the water receiving tank (6) while rotating the dewatering tank (3) at a low speed in the outer tank (2) filled with water when washing vegetables. The vegetables can be washed effectively while stirring the water in the water receiving tank (6) with the momentum of the release by pressurizing and discharging it into the basket container (8). As in the prior art, there is no need for a rotary stirring blade for stirring water, and it is possible to save time and effort for escaping the rotary stirring body when the container (8) is detached from the outer tub (2).

During vegetable washing, water is circulated between the outer tub (2) and the water receiving tub (6), so water consumption can be reduced.
Since the water circulating through the outer tank (2) and the water receiving tank (6) is purified through the filter (61), the cleaning effect can be further enhanced.
At the time of dehydration, the water in the outer tub (2) is drained and the dehydration tub (3) is rotated at high speed.
Water adhering to vegetables is blown away by centrifugal force, and dehydration can be completed in a short time.
Since the water can be stored in the fresh water tank (41) and the sterilized water tank (42) during the washing of vegetables, the work efficiency can be increased.

Since the washing apparatus can wash and dehydrate vegetables without transferring the basket container (8) in one outer tub (2), the installation space for the washing apparatus can be small. In addition, it is possible to save labor and time for transferring the washed vegetables to the dehydrating apparatus as in the prior art.
Compared with a conventional apparatus for washing vegetables while moving four stations, the apparatus can be reduced in size and manufactured at low cost.

  Since the washing | cleaning apparatus of Claim 2 discharge | releases the water stored in the water storage tank (4) to the water receiving tank (6), and supplies the water of a water receiving tank (6) to an outer tank (2) with a pump (62), Water splash can be suppressed as compared with the case where the water in the water storage tank (4) is dropped and released directly into the outer tank (2).

  Since the discharge pipe (63) from the water receiving tank (6) is connected to the cover lid (12) covering the upper part of the outer tank (2), the cleaning device of claim 3 discharges water from the water receiving tank (6). When supplying to the outer tub (2) through (63), it is possible to prevent water from splashing outside the cover lid (12).

  The cleaning device of claim 4 stores water in the water tank (4) during vegetable washing and dehydration, and opens the valve (45) when necessary to allow the water in the water tank (4) to fall naturally. Thus, the outer tank (2) and the water receiving tank (6) can be filled with water in a short time.

The dehydrating tub (3) of the cleaning device according to claim 5 can stabilize the dehydrating tub (3) because the lid (5) can be closed and locked to fix the container (8) to the outer tub (2). It can be rotated at high speed.
Further, the water in the water receiving tank (6) can be discharged from the opening (52) of the lid (5) into the outer tank (2) without any trouble.

  When the water in the outer tub (2) is agitated by the rotation of the dehydrating tub (3) or the discharge of water from the discharge pipe (63) into the outer tub (2), The short cylindrical wall (53) provided at the opening edge of the lid (5) can be prevented from jumping out from the opening (52).

  In the cleaning device according to the seventh aspect, the cleaning process can be divided into washing and rinsing. In the washing process, the outer tub (2) is filled with the washing water in the sterilizing water tank (42) and washed while sterilizing the vegetables. In the rinsing process, the outer tub (2) is filled with the fresh water in the fresh water tank (41). The fungicide attached to the vegetables in the washing process can be removed.

  In the cleaning device according to the eighth aspect, since the rotation of the dewatering tank (3) stops when the cover lid (12) is opened, safety can be maintained even if the cover lid (12) is opened carelessly.

  The method for washing and dehydrating vegetables according to claim 9 has the same effects as described in claim 1.

As shown in FIG. 1 and FIG. 2, the cleaning device is located on the base (1), the outer tub (2), the side of the outer tub and the water receiving tub (6), and a water storage tank located above the water receiving tub. (4) is deployed.
The base (1) is formed of a saddle material such as a pipe material or an angle material.

(Outer tank)
As shown in FIGS. 4 and 5, the outer tub (2) has a bottomed cylindrical body with an upper surface opening, and is supported by being suspended from the base (1) by a plurality of suspension type dumbbells (10). Yes.
At the upper end of the outer tub (2), the water in the outer tub (2) overflows and escapes to the water receiving tub (6), and the water is located at a position slightly higher than the escaping port (21). A water level detector (not shown) is provided to prevent overflow.
A large-diameter drain pipe (29) is connected to the bottom plate (23) of the outer tub (2), and the drain pipe (29) is opened and closed by an electromagnetic valve (not shown).
The bottom plate (23) is provided with a motor (27) for rotationally driving the following dewatering tank (3).

(Dehydration tank)
A dewatering tank (3) is rotatably disposed in the outer tank (2).
The dehydration tank (3) is gradually reduced in diameter to the lower part in the shape of an inverted spindle, has an open top surface, and has a bottom.
The peripheral wall (32) of the dewatering tank (3) has many small holes (33) and has good water permeability.
At the center of the bottom plate (34) of the dewatering tank (3), a rotating shaft (24) is projected through the bottom plate (34) of the outer tank (2). The rotating shaft (24) and the outer tank (2) The rotating shaft of the upper motor (27) is connected via pulleys (25) and (26) and an endless belt (28).

(Lid)
The dewatering tank (3) has a flange (31) at the upper end, and a lid (5) is attached to the flange (31) by a hinge (51) so as to be opened and closed in the vertical direction.
As shown in FIG. 5, the lid (5) is formed in an annular body having a large opening (52) at the center, and can be locked to the outer tub (2) in a closed state by a locking means (54).
The lock means (54) protrudes on a plurality of lock shafts (55) spring-biased on the outer periphery of the lid (5) and on the flange (31) of the dewatering tank (3). The lock shaft (55) can be locked by fitting it into the reverse U-shaped bracket (56), and the lock shaft (55) is removed from the reverse U-shaped bracket (56). The lock can be released.

(Container)
In the dewatering tank (3), the basket container (8) is accommodated without looseness and detachable. The dredger container (8) is open at the top and has a bottom, and the peripheral wall is mesh and has good water permeability.
The dredge container (8) has a flange (81) at the upper end, and when the dredge container (8) is accommodated in the dewatering tank (3), the flange (81) becomes the flange (31) of the dewatering tank (3). Covered. When the lid (5) is closed and locked, the flange (81) of the dredger container (8) covers and presses the lid (5) to fix the dredge container (8) to the outer tub (2). it can.

(Water tank)
As shown in FIG. 6, the water receiving tank (6) adjacent to the outer tank (2) has an upper surface opening at a position slightly lower than the outlet (21) of the outer tank (2). A large bag-like filter (61) for filtering water from 21) is removably provided.
As shown in FIG. 7, a pump (62) is provided in the water receiving tank (6), and a large-diameter discharge pipe (63) extends from the pump (62) toward the outer tank (2).
The tip of the discharge pipe (63) faces the opening (52) of the lid (5) of the dewatering tank (3) with the lid (5) closed, and obstructs the opening and closing of the lid (5). There is no position.
The water receiving tank (6) is provided with a water level detector (not shown) for detecting that the pump (62) reaches a water level at which normal operation can be performed without entraining air.
A drain pipe (64) with an electromagnetic valve is provided at the bottom of the water receiving tank (6).

(Water storage tank)
As shown in FIG. 2, in the embodiment, the water storage tank (4) is composed of a fresh water tank (41) and a sterilizing water tank (42) arranged side by side. There is enough capacity to fill the outer tank (2) and the receiving tank (6).
The fresh water tank (41) stores fresh water such as tap water, and the sterilized water tank (42) stores sterilizing water such as hypozinc chlorate water.
In the fresh water tank (41) and the sterilized water tank (42), a water level detector (not shown) for preventing overflow of water is provided.

The bottoms of the fresh water tank (41) and the sterilization water tank (42) are located higher than the top opening of the outer tank (2), and the large discharge pipes (43) and (44) are connected to the outer tank (2) side from the bottom. It is extended to.
The discharge pipes (43) and (44) have electromagnetic valves (45) and (46), respectively.
The distal ends of the discharge pipes (43) and (44) face the center of the upper surface of the outer tub (2) and are in a position where there is no hindrance to opening and closing the lid (5).

(Control box)
The base (1) is provided with a control box (7), which is provided with operation switches such as operation switches and input switches, and a control board, a rotation drive motor (27) of the dewatering tank (3), and a cleaning board. Valves (45) and (46) of the discharge pipes (43) and (44) of the water tank (41) and the sterilization water tank (42), the pump (62) and the outer tank of the discharge pipe (63) of the water receiving tank (6) The valves (not shown) of the drain pipes (29) and (64) of (2) and the water receiving tank (6) are controlled according to the inputted cleaning program. In addition, upon receiving signals from each water level detector, it prevents overflow of water from each tank and normal operation of the pump (62).

(Cover plate)
The base (1) is provided with a cover plate (11) surrounding the upper end opening of the outer tub (2) from three sides except the water receiving tub (6) side. A foldable cover lid (12) is provided at the upper surface opening of the.
When the cover lid (12) is opened, the motor (27) of the dewatering tank (3) is controlled to stop regardless of whether it is being washed or dewatered.

(Washing and dehydration process)
An example of the cleaning and dehydration process will be described with reference to the flowchart of cleaning and dehydration shown in FIG.
Prior to washing, the straw container (8) containing vegetables ("cut vegetables" cut into a size that is easy to eat in the embodiment) is put into the dehydration tank (3), and the lid (5) is closed. Lock the operation switch in step 1 (S1).
In step 2 (S2), the valve (46) of the discharge pipe (44) of the sterilization water tank (42) is opened to discharge the washing water from the discharge pipe (44) into the outer tank (2).
Since the discharge pipe (44) has a large diameter and the washing water is spontaneously dropped and discharged from the discharge pipe (44), the outer tub (2) is filled with the washing water in a short time.
Wash water overflowing from the outer tank (2) flows from the outlet (21) to the water receiving tank (6).

Next, the process proceeds to step 3 (S3), the motor (27) is operated to rotate the dewatering tank (3) at a low speed, and the pump (62) is operated to receive the water receiving tank (6) from the discharge pipe (63). Is discharged as pressure water into the outer tub (2) from the opening (52) of the lid (5). The water in the outer tub (1) is agitated by the rotation of the dehydration tub (3) and the discharge of pressure water to actively wash the vegetables.
If the rotation of the dehydration tank (3) is switched between forward and reverse intermittently, the stirring of water becomes more active and the cleaning effect can be enhanced.
If the sterilizing water tank (42) becomes empty during cleaning, the valve (46) is automatically closed and the cleaning water is discharged from the cleaning water supply pipe (not shown) to the sterilizing water tank (42), so that the next cleaning is performed. Store the washing water in the sterilization water tank (42).

The wash water overflowing from the outlet (21) of the outer tank (2) is received in the water receiving tank (6) and returned to the outer tank (2) by the pump (62) for circulation. Can be suppressed.
Since the circulating washing water is filtered by the filter (61) of the water receiving tank (6), the washing basket and fine vegetable waste do not circulate, and the cut vegetables can be washed effectively.
When the set time has elapsed, the process proceeds to step 4 (S4), and the valves of the drain pipes (29) and (64) of the outer tank (2) and the water receiving tank (6) are opened, and the outer tank (2) and the receiving tank are opened. The washing water in the water tank (6) is discharged.

Next, the process proceeds to step 5 (S5), where the dehydration tank (3) is switched to high speed rotation and the cut vegetables are subjected to intermediate dehydration.
In step 6 (S6), it is detected that the above washing and intermediate dehydration are repeated a set number of times, and then the process proceeds to step 7 (S7) to discharge the fresh water in the fresh water tank (41) to the outer tank (2). Save up.
During the washing of vegetables, water can be stored in the fresh water tank (41) and the sterilized water tank (42), so the time to fill the fresh water tank (41) and the sterilized water tank (42) with water in the outer tank (2) The cleaning work efficiency can be increased without adding to the time required for vegetable washing and dehydration.

  The above-described washing process from Step 2 (S2) to Step 6 (S6) with washing water is repeated as shown in Step 7 (S7) to Step 11 (S11) as a rinsing process with fresh water. In step 12 (S12), cleaning and dehydration are completed.

(Operation and effect of the embodiment)
As described above, when washing vegetables, the water in the water receiving tank (6) is pressurized with the pump (62) while rotating the dehydrating tank (3) at a low speed, and discharged from above into the basket container (8). Since the water in the water receiving tank (6) is washed while stirring with the momentum of discharge, high washing ability can be exhibited.
During vegetable washing, the water in the outer tub (2) is released to the receiving tub (6), and the water in the receiving tub (6) is circulated back to the outer tub (2) as described above. Can be suppressed.
Since the water circulating through the outer tub (2) and the water receiving tub (6) is purified through the filter (61), it is possible to suppress a decrease in cleaning ability.
At the time of dehydration, the water in the outer tub (2) is drained, the dewatering tub (3) is rotated at a high speed, and the water adhering to the vegetables is blown away by centrifugal force.

Since the lid (5) of the dewatering tank (3) can be closed and locked to fix the soot container (8) to the outer tank (2), the dewatering tank (3) and the soot container (8) can be stably integrated. Can be rotated.
A short cylindrical wall (53) provided at the opening edge of the lid (5) is rotated by the dewatering tank (3) or the water is discharged from the discharge pipe (63) into the outer tank (2). 2) When the water in the inside is agitated, cut vegetables can be prevented from jumping out from the opening (52) of the lid (5).

  The washing process is divided into washing and rinsing. In the washing process, the outer tub (2) can be filled with the washing water in the sterilizing water tank (42) to sterilize the vegetables. Since the outer tub (2) is filled with fresh water and the disinfectant attached in the washing step can be removed, a high cleaning effect can be obtained.

  In carrying out the present invention, a discharge pump (not shown) is connected to a water storage tank (4), specifically, a fresh water tank (41) and a sterilization water tank (42), and water is supplied to the outer tank (2) by the pump. You may supply. In this case, it is not necessary to install the fresh water tank (41) and the sterilizing water tank (42) at a higher position than the outer tank (2).

FIGS. 9 and 10 show another embodiment of the cleaning device, and the fresh water tank (41) and the discharge pipes (43) and (44) of the sterilizing water tank (42) constituting the water tank (4) are stored in the reservoir. It is located so that the water dropped and discharged into the water receiving tank (6). A discharge pipe (63) for supplying water from the water receiving tank (6) to the outer tank (2) is connected to an openable / closable cover lid (12) covering the upper part of the outer tank (2).
The connection position of the discharge pipe (63) to the cover lid (12) is that the water from the discharge pipe (63) is open to the opening (52) of the lid (5) of the dewatering tank (3) in the outer tank (2). The position is to be supplied from (see FIG. 4) to the dewatering tank (3).
A water supply pipe (20) for supplying clean water such as tap water to the outer tub (2) is also connected to the cover lid (12).
With respect to the cover lid (12), the discharge pipe (63) and the water supply pipe (20) are configured such that the connecting portion can be easily removed so as not to hinder the opening and closing of the cover lid (12).

When water discharge is started from the fresh water tank (41) or the sterilized water tank (42) to the water receiving tank (6), the pump (62) (not visible in FIGS. 9 and 10 is hidden. See FIG. 7), The water in the water receiving tank (6) is supplied to the outer tank (2), specifically, to the dewatering tank (4) in the outer tank (2). In the same manner as described above, water that has escaped from the upper end of the outer tub (2) to the water receiving tank (6) is supplied to the outer tub (2) by the pump (62), and between the water receiving tub (6) and the outer tub (2). The water circulates.
As shown in FIG. 4, the water in the fresh water tank (41) and the sterilizing water tank (42) is directly discharged into the opening (52) of the lid (5) of the dewatering tank (4) by the discharge pipes (43) and (44). In the case of falling and releasing, the water splash near the opening becomes severe, but in the case of FIGS. 9 and 10, the water splash can be suppressed.

  The above description of the embodiments is for explaining the present invention, and should not be construed as limiting the invention described in the claims or reducing the scope thereof. In addition, the configuration of each part of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims.

It is a perspective view of the washing | cleaning apparatus of the state which opened the cover lid | cover. It is a perspective view of the washing | cleaning apparatus of the state which opened the cover body. It is a perspective view of the washing | cleaning apparatus of the state which closed the cover lid | cover. It is the perspective view of the washing | cleaning apparatus which carried out the longitudinal cross-section of the cover body, the outer tank, the dehydration tank, and the soot container in the state which closed the cover body. It is the perspective view of the washing | cleaning apparatus which carried out the longitudinal cross-section of the outer tank, the dehydration tank, and the soot container in the state which opened the cover body. It is the perspective view of the washing | cleaning apparatus which carried out the longitudinal cross-section of the outer tank, the dehydration tank, the soot container, and the water receiving tank in the state which opened the cover body. It is a rear view of the washing | cleaning apparatus which cut the water receiving tank. It is a flowchart which shows an example of a washing | cleaning and a spin-drying | dehydration process. It is the perspective view which looked at the washing | cleaning apparatus of the other Example from diagonally forward. The cleaning device is the perspective view seen from the side obliquely above.

Explanation of symbols

1 Base 2 Outer tank 3 Dehydration tank 4 Water tank
41 fresh water tank
42 Sterilization tank 5 Lid 6 Receiving tank
62 Pump
63 Discharge pipe

Claims (9)

  An outer tub (2), a water-permeable dewatering tub (3) rotatably disposed in the outer tub, and a water-permeable jar (removable tank) containing vegetables to be detachably set in the dewatering tub 8) and a water receiving tank (6) that circulates water between the outer tank (2) and a water receiving tank (6) that is connected to the pump (62) and purified through the filter (61). A vegetable washing apparatus comprising a discharge pipe (63) for discharging to (2) and a water storage tank (4) that can store water and supply it to the outer tank (2) when necessary.   The water in the water storage tank (3) is discharged to the water receiving tank (6), the water in the water receiving tank (6) is sent to the water storage tank (3) by the pump (62), and the water released from the outer tank (2) is received. The vegetable washing device according to claim 1, wherein the vegetable washing device receives water in the water tank (6) and circulates water between the water receiving tank (6) and the outer tank (2).   The vegetable washing according to claim 1 or 2, wherein a cover lid (12) is covered above the outer tank (2), and a discharger (63) from the water receiving tank (6) is connected to the cover lid (12). apparatus.   The water storage tank (4) is arranged at a higher position than the outer tank (2) and the water receiving tank (6). By opening the valve (46), the internal water is put into the outer tank (2) or the water receiving tank (6) by its own weight. The vegetable washing apparatus of Claim 1 or 2 which can discharge | release.   The dehydration tank (3) is provided with a lid (5) covering the dredger container (8) so that it can be opened and closed and locked in the closed position, and the lid (5) is used for pouring water into the dredge container (8). The vegetable cleaning device according to any one of claims 1 to 4, wherein the vegetable cleaning device has an opening (52).   The vegetable washing apparatus according to any one of claims 1 to 5, wherein a short cylindrical wall (53) projects upward from the opening edge of the lid (5).   The water storage tank (4) is composed of a fresh water tank (41) and a sterilization water tank (42), each having a separate discharge valve (45) (46). The fresh water tank (41) is used for tap water, etc. The vegetable washing apparatus according to any one of claims 1 to 6, wherein fresh water is stored, and the sterilizing water tank (42) stores sterilizing washing water such as hypozinc chloric acid water.   The vegetable washing apparatus according to any one of claims 1 to 7, wherein the cover lid (12) covers the outer tub (2), and the rotation of the dehydration tub (3) stops when the cover lid (12) is opened.   9. Using the vegetable washing apparatus according to any one of claims 1 to 8, a basket container (8) containing vegetables is set in a dewatering tank (3), and the dewatering tank (3) is rotated at a low speed in the washing process. The water in the water receiving tank (6) is pressurized with the pump (62) and discharged into the dredger container (8), and the water in the water receiving tank (6) is washed with stirring while being dehydrated. In the process, the water in the outer tub (2) is drained, the dewatering tub (3) is rotated at high speed, and the water adhering to the vegetables is dehydrated by centrifugal force to dehydrate the vegetables.

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