JP6715295B2 - Dishwasher - Google Patents

Description

The present invention relates to a dishwashing apparatus for washing dishes with washing water while transporting the dishes, and in particular, in a plurality of washing steps, the washing water used for washing the dishes is collected and the collected washing water is reused for washing the dishes. It relates to a dishwasher used.

2. Description of the Related Art Conventionally, when washing a large amount of tableware, a dishwashing apparatus has been used for washing dishes by spraying washing water on the dishes with a washing nozzle while transporting a plurality of dishes by a conveyor or the like. The dishwasher is divided into a plurality of sections according to the purpose of cleaning, such as rough cleaning, detergent cleaning, rinsing cleaning, and final cleaning. The conveyor is arranged in the dishwashing device so that the dishes are conveyed to these compartments.

For example, Patent Document 1 proposes a dishwashing device that washes dishes in the order of a main washing process, a rinse washing process, and a finishing washing process while transporting the dishes in a carrying section. The dishwasher is provided with a washing nozzle for spraying washing water on the dishes in order to perform washing in each step. The cleaning water discharged from the cleaning nozzle is collected in the storage tank, and the collected cleaning water is sent under pressure to the cleaning nozzle for reuse in dish washing.

The supply of cleaning water (clean water) to the entire dishwashing device is performed by supplying clean water to the cleaning nozzle in the final cleaning process, and the supply of cleaning water to the storage tank in the main cleaning process is performed in the final cleaning process. The washing water is sequentially overflowed from the storage tank to the storage tank in the main cleaning process.

JP, 2005-305097, A

However, in the dishwashing apparatus as in Patent Document 1, the washing water overflows sequentially from the storage tank in the finish cleaning step (storage tank on the outlet side of the apparatus) to the storage tank in the main cleaning step (storage tank on the inlet side of the apparatus). However, the desired amount of cleaning water may not be stably supplied to the storage tank in the main cleaning process. In particular, if the amount of tableware transported changes, or if the shape or size of tableware changes, the wash water that has adhered to the tableware may not be collected in the storage tank and may be taken out of the process. It is difficult to overflow the wash water.

In view of such a point, for example, a supply pump or the like may be further provided so that the cleaning water is supplied from the outlet side storage tank to the inlet side storage tank. Not only will the cost of the dishwasher increase, but the size of the dishwasher will also increase.

The present invention has been made in view of the above points, and an object thereof is to wash the dish washing device from the washing water storage tank on the outlet side to the inlet side at a low cost without increasing the size. An object of the present invention is to provide a dishwashing device that can stably supply wash water to a water storage tank.

In view of the above problems, the dishwashing apparatus according to the present invention is a dishwashing apparatus for washing dishes, and a transport unit that transports the dish from an entrance to an exit of the dishwashing apparatus, and the dishwasher is transported by the transport unit. A first cleaning unit that cleans the dishes, and a second cleaning unit that cleans the dishes that have been cleaned by the first cleaning unit and transported by the transport unit, the first cleaning unit and the second cleaning unit. Each of the cleaning units includes a cleaning nozzle for spraying cleaning water onto the tableware transported by the transporting unit, a storage tank for collecting the cleaning water discharged from the cleaning nozzle, and a storage tank for storing the recovered cleaning water, and the storage tank. And a pumping unit that pumps the stored cleaning water to the cleaning nozzle, wherein the pumping unit of the second cleaning unit diverts the cleaning water that is pumped to the cleaning nozzle of the second cleaning unit. The cleaning water is connected to the first cleaning unit so as to be supplied to the storage tank of the first cleaning unit.

According to the present invention, in each of the first cleaning unit and the second cleaning unit, the cleaning water sprayed on the dishes from the cleaning nozzle is collected and stored in the storage tank, and the cleaning water stored in the storage tank is reused again. In order to use it for washing dishes, the pressure is sent to the washing nozzle by the pressure feeding unit. That is, in the first cleaning unit and the second cleaning unit, the cleaning water flows and circulates in the order of the cleaning nozzle, the storage tank, and the pumping unit.

Here, since the dishes transported by the transport unit are washed in the order of the first cleaning unit and the second cleaning unit, part of the cleaning water in the first cleaning unit adheres to the dishes and part of the transportation unit. Then, it is taken out from the first cleaning section. However, in the present invention, since the wash water that is pressure-fed by the pressure-feeding unit of the second cleaning unit is divided and the divided wash water is supplied to the storage tank of the first cleaning unit, the tableware conveyance amount, size, or A desired amount of cleaning water can be supplied to the storage tank of the first cleaning unit regardless of the shape or the like. In addition, since the cleaning water is supplied to the storage tank of the first cleaning unit by using the pressure supply unit for pumping the cleaning water to the cleaning nozzle of the second cleaning unit, it is necessary to add a new pumping device such as a pump. Therefore, it is possible to secure the size of the dishwasher as before (without increasing the size) and replenish the washing water to the storage tank of the first washing section at low cost.

As a more preferable aspect, the pressure feeding unit of the second cleaning unit includes an adjustment valve that adjusts the supply amount of the cleaning water supplied to the storage tank of the first cleaning unit. According to this aspect, the supply amount of the cleaning water supplied to the storage tank of the first cleaning unit is adjusted as necessary by adjusting the opening/closing or the opening degree of the adjustment valve of the pumping unit of the second cleaning unit. A proper amount of cleaning water can be supplied (supplemented) to the storage tank of the first cleaning unit.

As a further preferred aspect, in each of the storage tank of the first cleaning unit and the storage tank of the second cleaning unit, a water amount detection sensor for detecting the amount of cleaning water in the storage tank is arranged, The dishwasher includes a control unit that controls the opening of the adjustment valve based on the amount of water detected by the water amount detection sensor of the first cleaning unit and the water amount detection sensor of the second cleaning unit.

According to this aspect, the amount of washing water in the storage tank of the first washing unit is monitored by the water amount detection sensor, and when it is determined that the amount of water is small, the control unit opens or adjusts the opening degree of the adjustment valve. And the cleaning water can be supplied (supplemented) to the storage tank of the first cleaning unit. On the other hand, when the amount of cleaning water in the storage tank of the second cleaning unit becomes small or the amount of water sharply decreases, the control unit closes the adjustment valve or reduces the opening degree of the first cleaning unit. It is possible to limit the washing water supplied to the storage tank of some parts. In this way, the cleaning water supplied to the storage tank of the first cleaning unit is monitored while monitoring the amount of cleaning water stored in the storage tank of the first cleaning unit and the storage tank of the second cleaning unit with the water amount detection sensor. The supply amount can be adjusted automatically.

In a more preferred specific embodiment, the cleaning nozzle of the second cleaning unit is a rinse cleaning nozzle for spraying rinse cleaning water, and the rinse cleaning water is sprayed onto the dishes conveyed by the conveyor to be used as finish cleaning water. A final cleaning nozzle for spraying clean water, and the storage tank of the second cleaning unit collects the rinse cleaning water discharged from the rinse cleaning nozzle and the final cleaning water discharged from the final cleaning nozzle, and the recovered cleaning A rinse cleaning water storage tank that stores water as rinse cleaning water is provided, and the pumping section of the second cleaning section rinses the rinse cleaning water stored in the rinse cleaning water storage tank by pressure to the rinse cleaning nozzle. A rinsing water pressure-feeding unit divides the rinsing water that is pressure-fed to the rinsing washing nozzle, and the rinsing water that has been diverted is supplied to the storage tank of the first washing unit. , Is connected to the first cleaning unit.

According to this aspect, in the second cleaning unit, the tableware transported by the transport unit is washed with the rinse cleaning water sprayed from the rinse cleaning nozzle and then the finish cleaning water sprayed from the finish cleaning nozzle (clean water). ) Is washed. Here, the rinsing water and the finishing rinsing water are collected as rinsing water in the rinsing water storage tank, and the rinsing water collected and stored in the rinsing water tank is rinsed so that it can be reused for washing dishes. It is pumped to the cleaning nozzle.

At this time, the rinse water for pressure supply to the rinse nozzle is used to divert the rinse water to be pressure-fed to the rinse nozzle, and the divided rinse water is supplied to the storage tank of the first cleaning unit. can do.

In this way, the finish cleaning water once used for cleaning is not only circulated for reuse in the second cleaning unit, but also supplied to the storage tank of the first cleaning unit and reused in the first cleaning unit as well. be able to. As a result, the washing water supplied from the outside to the dishwashing machine during dishwashing can be limited to the clean water used in the finishing nozzle, and the amount of wash water (clean water) used by the dishwashing machine as a whole can be reduced. You can

In a further preferred embodiment, the first cleaning unit collects the detergent cleaning water discharged from the detergent cleaning nozzle, which sprays the detergent cleaning water containing the detergent on the dishes conveyed by the conveying unit, A detergent cleaning section including a detergent cleaning water storage tank for storing the collected detergent cleaning water, and a detergent cleaning water pressure-feeding section for pumping the detergent cleaning water stored in the detergent cleaning water storage tank to the detergent cleaning nozzle. The rinsing water pumping unit is connected to the detergent rinsing unit so that the rinsing water diverted is supplied to the detergent rinsing water storage tank.

According to this aspect, the detergent cleaning water stored in the detergent cleaning water storage tank has a predetermined concentration of detergent added to the cleaning water, and the rinse cleaning water divided in the rinse cleaning water pumping unit is stored in the detergent cleaning water. Since the desired amount is supplied to the tank when necessary, the concentration of the detergent in the detergent washing water storage tank can be easily controlled.

According to the present invention, the washing water can be stably supplied from the washing water storage tank on the outlet side to the washing water storage tank on the inlet side at a low cost without increasing the size of the dishwasher.

The schematic conceptual diagram of the dishwashing apparatus which concerns on embodiment of this invention.

Hereinafter, a dishwasher according to an embodiment of the present invention will be described with reference to FIG.
1. Overall Structure of Dishwashing Apparatus 1 As shown in FIG. 1, the dishwashing apparatus 1 according to the present embodiment is an apparatus for washing dishes P with a wash water while transporting the dishes P on a conveyor 2 (transportation unit). The dishwashing apparatus 1 performs a rough washing unit 3 for roughly washing the dishes P, a detergent washing unit 4 for washing the dish P that has been roughly washed with a detergent, a rinsing washing unit 5 for rinsing the dishwashed dishes P, and a rinsing wash. A finishing cleaning unit 6 for finishing cleaning the dishes P is provided.

Here, the rough cleaning unit 3 and the detergent cleaning unit 4 correspond to the first cleaning unit in the present invention, and the rinse cleaning unit 5 and the finish cleaning unit 6 correspond to the second cleaning unit in the present invention. .. In addition, in FIG. 1, a pipe through which water such as washing water flows is indicated by a dashed-dotted line, and a signal line for transmitting an electric signal is indicated by a broken line.

The conveyor 2 is a device that conveys the dishes P from an inlet 11 of the dishwashing apparatus 1 into which the dishes P are loaded toward an outlet 13 from which the dishes P are unloaded. The dishwasher 1 is provided with a transport passage 12 for transporting the dish P to the outlet 13 while washing the dish P introduced from the inlet 11. The transport passage 12 is a passage through which the dishes P are continuously passed from the rough cleaning unit 3 to the finish cleaning unit 6 described above.

The conveyor 2 includes a chain belt 21 that moves while placing the tableware P from an inlet 11 to an outlet 13 of the dishwashing apparatus 1 (specifically, the transport passage 12), a driven roller 22 around which the chain belt 21 is wound, and a drive. And a roller 23. The drive roller 23 is connected to a drive motor 25 via a drive belt 24.

With this configuration, when the drive motor 25 is driven, the drive roller 23 rotates via the drive belt 24, and the chain belt 21 wound around the drive roller 23 rotates the driven roller 22 while rotating the driven path 22. Move in. As a result, the tableware P placed on the chain belt 21 can be transported in the transport passage 12 from the rough cleaning unit 3 to the finish cleaning unit 6. Hereinafter, the device configuration from the rough cleaning unit 3 to the finish cleaning unit 6 will be described in detail.

2. About Rough Cleaning Section 3 The rough cleaning section 3 roughens the tableware P to wash away coarse dirt and the like attached to the used tableware P conveyed from the entrance 11 of the dishwashing apparatus 1 by the conveyor 2 with the rough cleaning water w1. This is the section to be washed. The rough cleaning unit 3 includes a rough cleaning nozzle 31 that sprays the rough cleaning water w1 onto the dishes P conveyed by the conveyor 2 from above and below. In addition, the rough cleaning nozzle 31 is a nozzle pipe (not shown) in which a shaft core is arranged in a direction traversing the conveyor 2 (a width direction of the chain belt 21 of the conveyor 2) and a shaft center direction of the nozzle pipe. A structure provided with at least a plurality of nozzle chips (not shown) attached to the nozzle pipe at predetermined intervals along the nozzle pipe.

As shown in FIG. 1, three rough cleaning nozzles 31 are arranged above and below, respectively, along the conveyance direction of the tableware P with the chain belt 21 of the conveyor 2 interposed therebetween. However, the number and arrangement of the rough cleaning nozzles 31 are not limited to this as long as the tableware P can be roughly cleaned with the rough cleaning water w1.

The rough cleaning unit 3 includes a rough cleaning water storage tank 32 that collects the rough cleaning water w1 discharged from the rough cleaning nozzle 31 and stores the recovered rough cleaning water w1 below the rough cleaning nozzle 31. A drain port 32a is provided at the bottom of the rough cleaning water storage tank 32, and the side surface of the rough cleaning water storage tank 32 overflows from the rough cleaning water storage tank 32 due to overflow of the rough cleaning water w1. A drainage port 32b for water is provided. Rough cleaning water w1 discharged from the drainage port 32a at the end of the apparatus operation and rough cleaning water w1 discharged from the overflow drainage port 32b at the time of operation of the apparatus (that is, at the time of cleaning) are both discharged via the drain pipe 79. Drained to the outside.

A water supply port 36 for supplying rinse wash water w3, which will be described later, is arranged above the rough wash water storage tank 32. Inside the rough wash water storage tank 32, the amount of the stored rough wash water w1 ( A water amount detection sensor 37 for detecting the stored amount) is arranged. A signal corresponding to the water amount of the rough cleaning water w1 detected by the water amount detection sensor 37 is input to the control unit 8 via the signal line 81.

The rough cleaning unit 3 pumps the rough cleaning water w1 stored in the rough cleaning water storage tank 32 to the rough cleaning nozzle 31, and the rough cleaning water w1 pumped by the pressure pump 33 to the rough cleaning nozzle 31. And a water supply pipe 34 for supplying water. The pressure feed pump 33 and the water feed pipe 34 correspond to the “pressure feed unit of the first cleaning unit” in the present invention.

Further, the position of the chain belt 21 (of the conveyor 2) at the center of the conveyance direction of the region where the rough cleaning water w1 is sprayed by the rough cleaning nozzle 31 is lower than the positions of the chain belt 21 before and after the tableware P in the conveyance direction. As described above, the chain belts 21 before and after the center chain belt 21 in the conveying direction are inclined with respect to the horizontal direction. As a result, the tableware P being conveyed is inclined so as to be lowered toward the center thereof, and the rough cleaning water w1 sprayed from the rough cleaning nozzle 31 and adhering to the tableware P is discharged below the rough cleaning nozzle 31. It can be dropped into the rough wash water storage tank 32 and can be efficiently collected.

3. About the Detergent Cleaning Unit 4 The detergent cleaning unit 4 cleans the stains, such as oil, attached to the tableware P after the rough cleaning, which is conveyed from the rough cleaning unit 3 by the conveyor 2, with the detergent cleaning water w2 containing the detergent. This is a section for washing the dishes P with detergent. The detergent cleaning unit 4 includes a detergent cleaning nozzle 41 that sprays the detergent cleaning water w2 onto the dishes P conveyed by the conveyor 2 from above and below. The detergent cleaning nozzle 41 has the same structure as the rough cleaning nozzle 31. The detergent cleaning nozzles 41 are arranged in the upper and lower three, respectively, along the conveyance direction of the tableware P with the chain belt 21 of the conveyor 2 interposed therebetween. The number and arrangement of the detergent cleaning nozzles 41 are not limited to this.

The detergent cleaning unit 4 collects the detergent cleaning water w2 discharged from the detergent cleaning nozzle 41, and includes a detergent cleaning water storage tank 42 that stores the recovered detergent cleaning water w2 below the detergent cleaning nozzle 41. A drain port 42a is provided at the bottom of the detergent cleaning water storage tank 42, and at the end of the operation of the apparatus, the detergent cleaning water w2 discharged from the drain port 42a flows through the drain pipe 79 like the rough cleaning water w1. It is drained to the outside of the device via the.

A water supply port 46 for supplying rinse cleaning water w3 described later is arranged above the detergent cleaning water storage tank 42. Inside the detergent cleaning water storage tank 42, a water amount detection sensor 47 for detecting the water amount (accommodation amount) of the contained detergent cleaning water w2 and a concentration sensor for measuring the detergent concentration of the contained detergent cleaning water w2 (see FIG. (Not shown) and a temperature sensor (not shown) for measuring the temperature of the contained detergent cleaning water w2 are arranged. A signal corresponding to the water amount of the detergent washing water w2 detected by the water amount detection sensor 47 is input to the control unit 8 via the signal line 81. The signals of the concentration sensor and the temperature sensor are also input to the control unit 8.

Further, inside the detergent cleaning water storage tank 42, a heater 48 for heating the stored detergent cleaning water w2 is arranged. The heater 48 heats the contained detergent cleaning water w2 so that the detergent cleaning water w2 is sprayed from the detergent cleaning nozzle 41 onto the dishes P at a predetermined temperature (for example, 70° C.). Specifically, the controller 8 controls the heating temperature of the heater 48 based on the temperature detected by the temperature sensor described above.

The detergent cleaning unit 4 pumps the detergent cleaning water w2 stored in the detergent cleaning water storage tank 42 to the detergent cleaning nozzle 41, and the detergent cleaning water w2 pumped by the pressure pump 43 to the detergent cleaning nozzle 41. And a water supply pipe 44 for supplying water. The pressure feed pump 43 and the water feed pipe 44 correspond to the “pressure feed unit of the first cleaning unit (detergent cleaning water pressure feed unit)” in the present invention.

A water return inclined plate 76 is disposed between the detergent cleaning nozzle 41 of the detergent cleaning unit 4 and the rough cleaning nozzle 31 of the rough cleaning unit 3. The water return inclined plate 76 is inclined downward from the center of the plate in the carrying direction (the side of the rough cleaning unit 3) where the rough cleaning water storage tank 32 is located, and the other side (the side of the detergent cleaning unit 4) is cleaned with the detergent. It is inclined downward with the water storage tank 42. As a result, the rough cleaning water w1 that is discharged from the rough cleaning nozzle 31 to the dishes P and then adheres to the dishes P and drops from the dishes P, or the rough cleaning water w1 that is scattered from the dishes P does not move to the detergent cleaning unit 4. Thus, the rough cleaning water w1 can be collected in the rough cleaning water storage tank 32. Similarly, the detergent cleaning water w2 that is discharged from the detergent cleaning nozzle 41 to the dishes P and then adheres to the dishes P and drops from the dishes P, or the detergent cleaning water w2 that is scattered from the dishes P does not move to the rough cleaning unit 3. Thus, the detergent cleaning water w2 can be collected in the detergent cleaning water storage tank 42.

Further, the position of the chain belt 21 (of the conveyor 2) at the center of the conveying direction of the region where the detergent cleaning water w2 is sprayed by the detergent cleaning nozzle 41 is lower than the positions of the chain belt 21 before and after the tableware P in the conveying direction. As described above, the chain belts 21 before and after the center chain belt 21 in the conveying direction are inclined with respect to the horizontal direction. As a result, the tableware P being conveyed is inclined so as to be lowered toward the center thereof, and the detergent cleaning water w2 sprayed from the detergent cleaning nozzle 41 and adhering to the tableware P is disposed below the detergent cleaning nozzle 41. It can be dropped into the detergent washing water storage tank 42 and can be efficiently collected.

4. About Rinse Washing Section 5 The rinsing wash section 5 is a section for rinsing and washing the dishes P so that the detergent and the like attached to the dishes P after the detergent wash, which are conveyed from the detergent washing section 4 by the conveyer 2, are washed away with the rinse water w3. Is. The rinsing/cleaning unit 5 includes a rinsing/cleaning nozzle 51 that sprays the rinsing/cleaning water w3 onto the dishes P conveyed by the conveyor 2 from above and below. The rinse cleaning nozzle 51 has the same structure as the rough cleaning nozzle 31. The rinse washing nozzles 51 are arranged one above and one below the other with the chain belt 21 of the conveyor 2 interposed therebetween. However, if the tableware P can be rinsed with the rinse water w3, the number and arrangement of the rinse washing nozzles 51 will be described. Is not limited to this.

The rinse cleaning unit 5 collects the rinse cleaning water w3 discharged from the rinse cleaning nozzle 51, and includes a rinse cleaning water storage tank 52 that stores the recovered rinse cleaning water w3 below the rinse cleaning nozzle 51. A drain port 52a is provided at the bottom of the rinse water containing tank 52, and the rinse water W3 discharged from the drain port 52a is drained at the end of the operation of the apparatus, like the cleaning water in other containing tanks. It is drained to the outside of the device through the pipe 79.

A water supply port 56 for supplying clean water w4, which will be described later, is arranged above the rinse water container 52. In the rinse water containing tank 52, a water amount detection sensor 57 for detecting the amount of water (accommodation amount) of the rinse water W3 contained therein, and a temperature sensor (not shown) for measuring the temperature of the rinse water W3 contained therein. And are arranged. A signal corresponding to the amount of the rinse water W3 detected by the water amount detection sensor 57 and a signal of the temperature sensor are input to the control unit 8 via the signal line 81.

Further, a heater 58 that heats the stored rinse water w3 is disposed inside the rinse water storage tank 52, and the rinse water w3 is discharged from the rinse nozzle 51 at a predetermined temperature (for example, 80° C.) The heating temperature of the heater 58 is controlled by the controller 8 so as to be sprayed on the P.

The rinsing/cleaning unit 5 pressure-feeds the rinsing/cleaning water w3 stored in the rinsing/cleaning water storage tank 52 to the rinsing/cleaning nozzle 51, and the rinsing/cleaning water w3 pumped by the pressure-feeding pump 53 to the rinsing/cleaning nozzle 51. And a water supply pipe 54 for supplying water.

Further, the water supply pipe 54 divides the rinse water W3 that is pressure-fed to the rinse nozzle 51, and the divided rinse water w3 is the rough cleaning water storage tank 32 and the detergent corresponding to the first cleaning unit of the present invention. It is connected to the water supply pipes 54A and 54B so as to be supplied to each of the wash water storage tanks 42.

Specifically, each of the water supply pipes 54A and 54B is connected to the water supply ports 36 and 46 arranged above the rough cleaning water storage tank 32 and the detergent cleaning water storage tank 42, respectively. Adjustment valves 55A and 55B for adjusting the supply amounts of the rinse wash water w3 in the rough wash water storage tank 32 and the detergent wash water storage tank 42 are attached to the water supply pipes 54A and 54B, respectively. The pressure feed pump 53, the water feed pipe 54, the water feed pipes 54A and 54B, and the adjusting valves 55A and 55B correspond to the "pressure feed portion (rinse wash water pressure feed portion) of the second cleaning portion" according to the present invention.

The adjustment valve 55A that adjusts the supply amount of the rinse water W3 to the rough wash water storage tank 32 is used for the rinse water detected by the water amount detection sensor 57 and the water amount of the rough wash water storage tank 32 detected by the water amount detection sensor 37 described above. It is connected to the control unit 8 via a signal line 82 so that the opening degree of the adjustment valve 55A can be adjusted based on the amount of water in the water storage tank 52. On the other hand, the adjustment valve 55B that adjusts the supply amount of the rinse wash water w3 to the detergent wash water storage tank 42 is detected by the water amount of the detergent wash water storage tank 42 detected by the above-described water amount detection sensor 47 and the water amount detection sensor 57. The signal line 82 is connected so that the opening degree of the adjustment valve 55B can be adjusted based on the amount of water in the rinse water tank 52 and, if necessary, the concentration of the concentration sensor that measures the detergent concentration of the detergent wash water w2. It is connected to the control unit 8 via the.

Between the rinse cleaning nozzle 51 of the rinse cleaning section 5 and the detergent cleaning nozzle 41 of the detergent cleaning section 4, a water return inclined plate 77 inclined downward toward the detergent cleaning section 4 is arranged. By disposing the water return inclined plate 77, the detergent cleaning water w2 that is discharged from the detergent cleaning nozzle 41 to the dishes P and then adheres to the dishes P and drops from the dishes P, or the detergent cleaning water w2 that is scattered from the dishes P. The detergent cleaning water w2 can be collected in the detergent cleaning water storage tank 42 so that the cleaning solution does not move to the rinsing/cleaning section 5. As a result, the carry-out of the detergent washing water w2 from the detergent washing section 4 to the rinsing washing section 5 can be restricted, and the detergent can be prevented from being mixed into the rinsing washing water w3.

Further, the upper end portion between the rinse cleaning water storage tank 52 and the detergent cleaning water storage tank 42 is higher than the upper end portions of the detergent cleaning water storage tank 42 and the rough cleaning water storage tank 32. It is possible to prevent the detergent cleaning water w2 stored in the detergent cleaning water storage tank 42 from flowing into the rinse cleaning water storage tank 52 storing the rinse cleaning water w3 by overflow. As a result, it is possible to prevent the detergent of the detergent cleaning water w2 from mixing with the rinse cleaning water w3 in the rinse cleaning water storage tank 52 for washing away the detergent and the like adhering to the dishes P. Furthermore, the rinse wash water w3 from the rinse wash water storage tank 52 is prevented from flowing into the detergent wash water storage tank 42 due to an overflow, and the decrease in the detergent concentration of the detergent wash water w2 in the detergent wash water storage tank 42 is prevented. can do.

5. Finishing Washing Unit 6 The finishing washing unit 6 rinses the rinse washing water w3 and the like adhering to the tableware P after the rinse washing, which is conveyed by the conveyer 2 from the rinse washing unit 5, with the clean water w4 which is the finishing washing water. This is a section for finishing and cleaning the tableware P. The finish cleaning unit 6 includes a finish cleaning nozzle 61 that sprays clean water (finish cleaning water) w4 onto the dishes P conveyed by the conveyor 2 from above and below. The finish cleaning nozzle 61 has the same structure as the rough cleaning nozzle 31. The finish cleaning nozzle 61 is arranged one above and one below the chain belt 21 of the conveyor 2, but if the tableware P can be finish cleaned with clean water (finish cleaning water) w4, the finish cleaning nozzle 61 will be used. The number and the arrangement of the are not limited to this. In the present embodiment, the clean water (finish cleaning water) w4 discharged from the finish cleaning nozzle 61 is collected in the above-described rinse cleaning water storage tank 52 and is stored in the rinse cleaning water storage tank 52 as the rinse cleaning water w3.

Here, the clean water w4 supplied to the finish cleaning nozzle 61 is supplied from the supply port 70 to the dish cleaning device 1. The clean water w4 fed from the clean water pipe 71 in the apparatus passes through the heat exchanger 72 and is heated. The heat exchanger 72 is attached above the rough cleaning section 3 in the dishwashing apparatus 1, and is heated by the steam or steam of the washing water used to wash the dishes P by heating with the heaters 48 and 58 described above. Is a device for taking in water and heating the clean water w4.

The clean water pipe 73, which is connected to the heat exchanger 72 and supplies clean water w4 discharged from the heat exchanger 72, is branched so that the clean water w4 to be sent is directed to the finish cleaning nozzle 61 and the water supply port 56. There is. A flow rate adjusting valve 74 is attached to the clean water pipe 73 directed to the finish cleaning nozzle 61, and an open/close valve 75 is mounted to the clean water pipe 73 directed to the water supply port 56. The opening degree of the flow rate adjusting valve 74 and the opening/closing of the opening/closing valve 75 are controlled by a control signal input via the signal line 82.

A blower for draining the rinse water w3 attached to the surface of the tableware P that has been rinsed between the finish cleaning nozzle 61 of the finish cleaning unit 6 and the rinse cleaning nozzle 51 of the rinse cleaning unit 5. 9 are arranged. The blower 9 is arrange|positioned so that the compressed air A may be blown from above by the nozzle to the tableware P conveyed by the chain belt 21. Further, the chain belt 21 of the conveyor 2 to which the compressed air A of the blower 9 is blown is inclined upward as it goes in the conveying direction of the tableware P (it is a sloped surface).

By blowing the compressed air A from the blower 9 onto the tableware P, the rinse water w3 attached to the tableware P is cut off from the tableware P, so that the rinse water W3 slightly attached to the tableware P can be easily washed off from the tableware P. Therefore, the amount of clean water (finishing cleaning water) w4 sprayed from the finishing cleaning nozzle 61 of the finishing cleaning section 6 onto the tableware P can be reduced. Furthermore, since the chain belt 21 of the conveyor 2 immediately below the blower 9 is inclined so as to form a sloped surface, the rinse water w3 adhering to the inclined tableware P is in a state of being easily dropped, and the finishing cleaning unit 6 can be reduced.

6. About the method of cleaning the tableware P using the tableware cleaning device 6-1. Preparation for Operation of Dishwashing Apparatus 1 First, as a preparation step for operating the dishwashing apparatus 1, first, clean water w4 is supplied to the dishwashing apparatus 1 from the supply port 70. The supplied clean water w4 flows in the order of the clean water pipe 71, the heat exchanger 72, and the clean water pipe 73, passes through the open/close valve 75 opened by the control signal of the control unit 8, and is supplied to the rinse cleaning water storage tank 52. It At this time, the flow rate adjusting valve 74 may be closed by a control signal from the control unit 8.

The clean water w4 of the rinse water containing tank 52 is pressure-fed by the pressure-feeding pump 53, and via the adjusting valves 55A, 55B opened by the control signal of the control unit 8, the water supply pipes 54A, 54B to the water supply ports 36, 46. Sent to. As a result, cleaning water is supplied to each of the rough cleaning water storage tank 32 and the detergent cleaning water storage tank 42. In the detergent cleaning water storage tank 42, a detergent is supplied from a detergent supply device (not shown) so as to have a desired detergent concentration. As a result, the detergent cleaning water w2 is stored in the detergent cleaning water storage tank 42. The heaters 48 and 58 heat the detergent cleaning water w2 stored in the detergent cleaning water storage tank 42 and the rinse cleaning water w3 stored in the rinse cleaning water storage tank 52 to a set temperature. It In this state, the drive motor 25 and the pressure feed pumps 33, 43, 53 are driven.

6-2. Cleaning the tableware P with the tableware cleaning device 1 A method for cleaning the tableware P will be described below. The tableware P placed on the chain belt 21 of the conveyor 2 is transported from the entrance 11 of the dishwashing apparatus 1 into the transport passage 12. The tableware P that has passed through the entrance 11 of the dishwashing apparatus 1 is conveyed to the rough cleaning unit 3.

In the rough cleaning unit 3, the rough cleaning water w1 that is pressure-fed by the pressure pump 33 from the rough cleaning water storage tank 32 and is sent to the rough cleaning nozzle 31 is discharged from the rough cleaning nozzle 31 and sprayed on the dishes P. As a result, the extraneous matter attached to the tableware P is washed away.

Next, the tableware P that has been roughly cleaned by the rough cleaning unit 3 is conveyed to the detergent cleaning unit 4. In the detergent cleaning unit 4, the detergent cleaning water w2 whose temperature is adjusted in the detergent cleaning water storage tank 42 (for example, the temperature is adjusted to 70° C.) is pressure-fed by the pressure-feeding pump 43 to the detergent cleaning nozzle 41. The sent detergent washing water w2 is discharged from the detergent washing nozzle 41, sprayed on the dishes P, and the oil and the like attached to the dishes P are washed away.

Next, the tableware P that has been washed with the detergent by the detergent cleaning unit 4 is conveyed to the rinse cleaning unit 5. In the rinsing/cleaning unit 5, the rinsing/cleaning water w3 whose temperature is adjusted (for example, to 80° C.) in the rinsing/cleaning water storage tank 52 is pressure-fed to the rinsing/cleaning nozzle 51 by the pressure pump 53. The sent rinse water w3 is discharged from the rinse nozzle 51, sprayed on the dishes P, and the detergent adhering to the dishes P is washed away.

Next, the tableware P rinsed and washed by the rinsing/cleaning unit 5 is conveyed to the lower side of the blower 9 and the compressed air A of the blower 9 is blown to the tableware P to remove the rinse water w3 attached to the tableware P. Done. Finally, the tableware P is conveyed to the finish cleaning unit 6, and the rinse cleaning water w3 slightly attached to the tableware P is washed away with clean water (finish cleaning water) w4 from the finish cleaning nozzle 61.

6-3. Flow of Washing Water Here, the rough washing water w1 of the rough washing unit 3 adheres to the dishes P and is taken out, and is drained by overflow, and the detergent washing water w2 of the detergent cleaning unit 4 adheres to the dishes P. The amount of the rough cleaning water w1 in the rough cleaning water storage tank 32 and the amount of the detergent cleaning water w2 in the detergent cleaning water storage tank 42 are reduced. The amount reduced from taking out varies depending on the amount of the tableware P being conveyed, the shape of the tableware P, the size of the tableware P, and the like.

Therefore, in the present embodiment, the rinse water W3 that is pressure-fed to the rinse nozzle 51 is diverted from the pump 53, and the rinsing water w3 that has been diverted is stored in the rough wash water from the water supply port 36 via the water supply pipe 54A. Supply to the tank 32. Similarly, from the pressure pump 53, the rinse water w3 that is pressure-fed to the rinse nozzle 51 is diverted, and the diverted rinse water w3 is supplied from the water supply port 46 to the detergent cleaning water storage tank 42 via the water supply pipe 54B. To do. As a result, the rinse cleaning water w3 can be quickly supplied to each of the rough cleaning water storage tank 32 and the detergent cleaning water storage tank 42 when needed without adding a new pump.

Further, in the present embodiment, adjustment valves 55A and 55B for adjusting the supply amount of the rinse water w3 are attached to the water supply pipes 54A and 54B, and the opening degrees of the adjustment valves 55A and 55B are set by the control unit 8. Is controlled by the control signal.

Specifically, the opening degree of the adjustment valve 55A for adjusting the supply amount of the rinse wash water w3 to the rough wash water storage tank 32 is the amount of water in the rough wash water storage tank 32 detected by the water amount detection sensor 37 and the amount of water detected. It is adjusted based on the amount of water in the rinse water containing tank 52 detected by the sensor 57. More specifically, when the amount of water in the rough wash water storage tank 32 detected by the water amount detection sensor 37 is less than or equal to the reference value, the control unit 8 increases the opening of the adjustment valve 55A (in some cases, fully opens). Then, the adjusting valve 55A is controlled. On the other hand, when the amount of water in the rinse water containing tank 52 detected by the water amount detection sensor 57 is equal to or lower than the reference value or the rate of decrease in the amount of water is equal to or higher than the reference speed, the control unit 8 opens the adjustment valve 55A. The adjusting valve 55A is controlled so that the degree becomes smaller (the valve is closed in some cases). In this way, the amount of rough wash water w1 in the rough wash water storage tank 32 and the amount of rinse wash water w3 in the rinse wash water storage tank 52 can be adjusted.

Further, when the amount of water in the rinse water containing tank 52 detected by the water amount detection sensor 57 exceeds the reference value, the control unit 8 increases the opening of the adjustment valve 55A (fully opens it in some cases). The adjusting valve 55A is controlled. As a result, the rinse wash water w3 is positively sent to the rough wash water storage tank 32, and the rinse wash water w3 is discharged from the overflow drain port 32b of the rough wash water storage tank 32.

On the other hand, the opening of the adjustment valve 55B for adjusting the supply amount of the rinse wash water w3 to the detergent wash water storage tank 42 is detected by the water volume detection sensor 47 and the water amount of the detergent wash water storage tank 42 detected by the water volume detection sensor 47. It is adjusted on the basis of the amount of water in the rinse rinse water storage tank 52 and, if necessary, the detergent concentration measured by the concentration sensor. More specifically, when the amount of water in the detergent washing water storage tank 42 detected by the water amount detection sensor 47 is less than or equal to the reference value, or when the detergent concentration measured by the concentration sensor is higher than the reference value, the control unit 8 The adjustment valve 55B is controlled so that the opening degree of the adjustment valve 55B becomes large (fully opened in some cases). On the other hand, when the amount of water in the rinse water container 52 detected by the water amount detection sensor 57 is less than or equal to the reference value or the rate of decrease of the amount of water is greater than or equal to the reference speed, the control unit 8 opens the adjustment valve 55B. The adjusting valve 55B is controlled so that the degree becomes smaller (closed in some cases). In this way, the amount of detergent washing water w2 in the detergent washing water storage tank 42 and the concentration of the detergent, and the amount of rinse washing water w3 in the rinse washing water storage tank 52 can be adjusted.

Further, by providing the adjusting valves 55A and 55B and controlling the opening degree thereof by the control unit 8, it is possible to automatically secure the water amounts in the respective storage tanks while maintaining the mutual water amount balance. Further, in the rough cleaning water storage tank 32 and the detergent cleaning water storage tank 42, by managing the above-mentioned structure and the amount of water in the adjacent storage tank on the downstream side, the cleaning water due to the overflow of the cleaning water from the adjacent storage tank is managed. Not replenished. Therefore, the only wash water supplied to the dishwasher 1 from outside is the clean water w4, which is the finish wash water, and the other wash water (for example, rinse wash water w3) circulates in the dishwasher 1. Since it is used again for cleaning, it is possible to suppress the use of clean water w4 from the outside of the dishwasher 1 as a whole.

In addition, the water supply pipes 54A and 54B for supplying the rinse cleaning water w3 to the rough cleaning water storage tank 32 and the detergent cleaning water storage tank 42 are connected to the water supply pipe 54 that pressure-feeds the rinse cleaning water w3 to the rinse cleaning nozzle 51. Therefore, only by opening the adjusting valves 55A and 55B, it is possible to immediately supply a desired amount of the rinse water w3 to the storage tank that requires it.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various designs can be made without departing from the spirit of the present invention described in the claims. You can make changes.

For example, in the present embodiment, the rough cleaning unit and the detergent cleaning unit are provided as the first cleaning unit of the present invention, but if the cleaning unit includes the cleaning nozzle, the storage tank, and the pressure feeding unit, the cleaning unit is further provided. Alternatively, either the rough cleaning section or the detergent cleaning section may be omitted. In this case, in accordance with the number of cleaning units in the first cleaning unit, the rinse cleaning water is diverted from the water pipe for pressure-feeding the rinse cleaning water to the rinse cleaning nozzles of the second cleaning unit. It goes without saying that a water supply pipe is connected to each cleaning unit so as to supply it to the storage tank.

Further, in the present embodiment, a rinse cleaning unit and a finish cleaning unit are provided as the second cleaning unit of the present invention, and the finish cleaning water of the finish cleaning unit is collected in the rinse cleaning water storage tank. A finish cleaning water storage tank for recovery is provided, and the collected finish cleaning water is pressure-fed to the finish cleaning nozzle by the pressure-feeding unit, and a part of it is diverted so that the finish cleaning water is rough-cleaned, detergent-cleaned, or rinse-cleaned. It may be supplied to the storage tank of some parts.

1: dishwasher, 2: conveyor (conveying unit), 3: rough cleaning unit (first cleaning unit), 4: detergent cleaning unit (first cleaning unit), 5: rinse cleaning unit (second cleaning unit), 6: finish cleaning unit (second cleaning unit), 8: control unit, 9: blower, 21: chain belt, 22: driven roller, 23: drive roller, 24: drive belt, 25: drive motor, 31: rough cleaning Nozzle, 32: rough cleaning water storage tank, 32a: drainage port, 32b: overflow drainage port, 33: pressure pump, 34: water supply pipe, 36: water supply port, 37: water amount detection sensor, 41: detergent cleaning nozzle, 42 : Detergent washing water storage tank, 42a: Drain port, 43: Pressure pump, 44: Water supply pipe, 46: Water supply port, 47: Water amount detection sensor, 48: Heater, 51: Rinsing washing nozzle, 52: Susuki washing water storage tank , 52a: drain port, 53: pressure pump, 54, 54A, 54B: water pipe, 55A, 55B: adjusting valve, 56: water inlet port, 57: water amount detection sensor, 58: heater, 61: finishing cleaning nozzle, 71, 73: Water pipe, 72: Heat exchanger, 74: Flow control valve, 75: Open/close valve, 76, 77: Water return inclined plate, 79: Drain pipe, 81, 82: Signal line, A: Compressed air, w1: Rough wash water, w2: detergent wash water, w3: rinse wash water, w4: clean water (finish wash water), P: tableware.

Claims (6)

A dishwashing device for washing dishes,
A transport unit having a chain belt for transporting dishes along the transport direction from the entrance to the exit of the dishwasher,
A first cleaning unit that cleans the dishes transported by the transport unit; and a second cleaning unit that cleans the dishes transported by the transport unit by the first cleaning unit,
Each of the first cleaning unit and the second cleaning unit collects cleaning water discharged from the cleaning nozzle and a cleaning nozzle that sprays cleaning water on the dishes conveyed by the conveying unit, and stores the collected cleaning water. And a pumping unit that pumps the cleaning water contained in the container to the cleaning nozzle,
The first cleaning unit includes a plurality of cleaning units having a rough cleaning unit and a detergent cleaning unit ,
Each of the cleaning units includes the cleaning nozzle, the storage tank, and the pressure feeding unit,
The portion of the chain belt located in the first cleaning unit is such that in each of the cleaning units, the central position of the chain belt in the center of the transport direction of the cleaning water of the cleaning nozzle is closer to the central position than the central position. Also, so that the position is lower than the front and rear positions in the transport direction, the portions of the chain belt from the central position to the front and rear in the transport direction are inclined with respect to the horizontal direction ,
The second cleaning unit has a rinse cleaning unit and a finish cleaning unit,
The cleaning nozzle of the rinse cleaning section has a rinse cleaning nozzle for spraying rinse cleaning water,
The cleaning nozzle of the finish cleaning unit has a finish cleaning nozzle that sprays clean water onto the tableware to which the rinse cleaning water has been sprayed and which has been transported by the transport unit, as the final cleaning water.
The storage tank of the second cleaning unit collects the rinse cleaning water discharged from the rinse cleaning nozzle and the final cleaning water discharged from the finishing cleaning nozzle, and stores the collected cleaning water as rinse cleaning water. Have a tank,
The pressure-feeding unit of the second cleaning unit has a rinse-cleaning-water pressure-feeding unit that pressure-feeds the rinse-cleaning water stored in the rinse-cleaning-water storage tank to the rinse-cleaning nozzle,
On the downstream side of the rinse washing nozzle and on the upstream side of the finishing washing nozzle, air is blown to the dishes washed in the rinse washing section, and the rinse washing water adhering to the dishes is stored in the rinse washing water storage tank. A dishwasher characterized in that a blower for dropping is arranged . In the rough cleaning section and the detergent cleaning section , below the inclined portion of the chain belt, the chain belt of the rough cleaning section and the detergent cleaning section is arranged so that cleaning water flows in the storage tank. The dishwashing apparatus according to claim 1, wherein an inclined plate that is inclined downward toward the central position is arranged. The rinsing water pumping unit, flowing washing water pumped to the rinse nozzles min, washing water diverted is, as supplied to the storage tank of the first cleaning portion, said first cleaning unit The dishwasher according to claim 1 or 2, which is connected to the rough cleaning section and the detergent cleaning section . The rinsing water pumping unit, dishwashing apparatus according to claim 3, characterized in that it comprises an adjusting valve for adjusting the supply amount of the washing water supplied to the storage tank of the first cleaning portion. In each of the storage tank of the first cleaning unit and the storage tank of the second cleaning unit, a water amount detection sensor for detecting the amount of cleaning water in the storage tank is arranged,
The dishwasher includes a control unit that controls the opening degree of the adjustment valve based on the amount of water detected by the water amount detection sensor of the first cleaning unit and the water amount detection sensor of the second cleaning unit. The dishwasher according to claim 4, which is characterized in that. Portion of the chain belt air is blown by the blower, dishwashing apparatus according to any one of claims 1-5, characterized in that it is inclined relative to the horizontal direction.

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