Cleaning System

Abstract

To provide a washing system that can remove leftovers adhering to a washed material in a preliminary washing machine more effectively.SOLUTION: A washing system includes: a preliminary washing machine having a first washing nozzle 12B for injecting water to a first washing chamber, and a first washing water tank for reserving water to be supplied to the first washing nozzle and collecting the water injected by the first washing nozzle 12B; and a main washing machine having a second washing nozzle 112B for injecting the water to a second washing chamber, and a second washing water tank for reserving the water to be supplied to the second washing nozzle 112B and collecting the water injected by the second washing nozzle. The preliminary washing machine further has a leftover collecting filter arranged downward with respect to the position where the washed material is received, and collecting the leftover falling along with the water injected from the first washing nozzle 12B and adhering to the washed material. The injection pressure of the first washing nozzle 12B is larger than the injection pressure of the second washing nozzle 112B.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a cleaning system. [Background technology]

[0002] Washing of dishes using a washing machine is generally performed. Since dishes and other objects to be washed often have food residue attached thereto before washing, a pre-wash is performed manually to preliminarily remove food residue attached thereto by immersing the objects to be washed in an immersion tank containing water before storing the objects in the washing machine. However, due to the recent demand for labor saving, a washing machine that does not require such a pre-wash is required. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2012-511995 Summary of the Invention [Problem to be solved by the invention]

[0004] A washing system that meets such demands is disclosed, for example, in Patent Document 1. Patent Document 1 discloses a washing system that includes a spare washing machine (spare rinsing machine 50) in addition to a washing machine (dishwasher 250). In such a washing system, it is desired that the spare washing machine be able to more effectively remove leftover food and the like that adheres to the items to be washed.

[0005] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a washing system capable of more effectively removing food residue and the like adhering to items to be washed in a preliminary washing machine. [Means for solving the problem]

[0006] The washing system of the present invention comprises a preliminary washing machine having a first washing nozzle which sprays water into a first washing chamber containing the object to be washed and a first washing water tank which stores water to be supplied to the first washing nozzle and recovers the water sprayed by the first washing nozzle, and a main washing machine which washes the object to be washed in the preliminary washing machine and has a second washing nozzle which sprays water into a second washing chamber containing the object to be washed and a second washing water tank which stores water to be supplied to the second washing nozzle and recovers the water sprayed by the second washing nozzle, and the main washing machine washes the object to be washed in the preliminary washing machine, the preliminary washing machine is positioned below the position where the object to be washed is contained and further has a residue collection filter which collects residue attached to the object to be washed that falls together with the water sprayed from the first washing nozzle, and the spray pressure of the first washing nozzle is greater than the spray pressure of the second washing nozzle.

[0007] In the washing system of this configuration, the preliminary washing machine performs a preliminary washing to wash off food residues and the like from the washed object, and the main washing machine performs the main washing of the washed object from which the food residues and the like have been removed. The preliminary washing machine, which performs the preliminary washing, which is the step before the main washing, has a higher spray pressure from the first washing nozzle than the spray pressure from the second washing nozzle, and is therefore excellent in the ability to peel off food residues adhering to the washed object from the washed object. Therefore, the preliminary washing machine can more effectively remove food residues adhering to the washed object.

[0008] In the washing system according to the present invention, the ratio of the spray pressure of the first washing nozzle to the spray pressure of the second washing nozzle may be 1.5 or more. The preliminary washing machine having this configuration is superior to the main washing machine in the ability to peel off food residue adhering to the object to be washed from the object to be washed.

[0009] In the cleaning system according to the present invention, the opening area of ​​the jet hole in the second cleaning nozzle may be smaller than the opening area of ​​the jet hole in the first cleaning nozzle. In this configuration, the jet pressure of the first cleaning nozzle can be made larger than the jet pressure of the second cleaning nozzle, and the amount of water jetted per unit time from one first cleaning nozzle can be made smaller than the amount of water jetted per unit time from one second cleaning nozzle.

[0010] In the cleaning system according to the present invention, a spray pattern forming portion that spreads out in a V-shape toward the downstream direction is provided downstream of the injection hole of the first cleaning nozzle in the water injection direction. With this configuration, water is injected from the injection hole of the first cleaning nozzle over a wide range (wide angle), so that the objects to be cleaned housed in the cleaning chamber can be pre-washed evenly.

[0011] In the washing system according to the present invention, the amount of circulating water per unit time during the washing operation in the preliminary washer may be less than the amount of circulating water per unit time during the washing operation in the main washer. Here, when the residue collection filter is immersed in the stored water in the first washing water tank, the flow of stored water caused by the suction of the washing pump causes the residue to stick to the residue collection filter, preventing the water sprayed from the first washing nozzle from flowing into the first washing water tank through the residue collection filter (recovery in the first washing water tank). When such an event occurs, the storage volume of the first washing water tank decreases, and air may be trapped in the washing pump that supplies the water stored in the first washing water tank to the first washing nozzle. This air trapping can cause the washing pump to break down, so it is necessary to periodically remove the residue from the residue collection filter, but the increased frequency of this work reduces the operating rate of the washer and places a burden on the operator.

[0012] In this configuration, the amount of circulating water per unit time during the washing operation in the spare washer is less than the amount of circulating water per unit time during the washing operation in the main washer, so the amount of stored water in the first washing water tank in the spare washer can be made less than the amount of stored water in the second washing water tank in the main washer. That is, the stored water level in the first washing water tank in the spare washer can be made relatively low. This makes it possible to ensure a distance between the residue collection filter and the water level of the stored water in the first washing water tank without structurally improving the spare washer. As a result, the frequency with which the residue collection filter is immersed in the stored water in the first washing water tank is reduced, so the frequency of removing residue from the residue collection filter can be reduced, which in turn increases the availability of the spare washer and reduces the burden on the operator.

[0013] The first wash water tank of the spare washer of the washing system according to the present invention may further include a discharge section for discharging water exceeding a predetermined water level in the first wash water tank, and the residue collection filter may be disposed so that the bottom surface of the residue collection filter is positioned above the predetermined water level. In this configuration, the residue collection filter can be prevented from being immersed in the water stored in the first wash water tank. Effect of the Invention

[0014] According to the present invention, food residue and the like adhering to the items to be washed can be removed more effectively in the preliminary washer. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a cleaning system according to one embodiment. [Diagram 2] FIG. 2 is a perspective view of the preliminary cleaner and the main cleaner. [Diagram 3] FIG. 3 is a diagram showing a schematic configuration of the preliminary cleaning machine. [Figure 4] FIG. 4 is a perspective view showing a schematic configuration of the preliminary cleaning machine. [Diagram 5]Fig. 5(A) is a perspective view of a cleaning nozzle of a preliminary cleaning machine, Fig. 5(B) is a perspective view showing an enlarged spraying part of the cleaning nozzle of Fig. 5(A), and Fig. 5(C) is a perspective view of the cleaning nozzle of a main cleaning machine. [Figure 6] FIG. 6 is a cross-sectional view of the underwash nozzle and underrinse nozzle of the prewasher. [Figure 7] FIG. 7 is a cross-sectional perspective view of the vicinity of the upper end of the second washing water discharge pipe containing the second rinsing water discharge pipe of the preliminary washer. [Figure 8] FIG. 8 is a diagram showing a schematic configuration of the present cleaning machine. [Figure 9] FIG. 9 is a perspective view showing a schematic configuration of the present cleaning machine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are given the same reference numerals, and duplicated description will be omitted. The dimensional ratios of the drawings do not necessarily match those in the description. In the following description, the directions (up-down direction, front-rear direction, left-right direction) defined in Figures 2 to 4, 8, and 9 will be used for explanation.

[0017] 1, the cleaning system 200 includes a preliminary soaking tank 203, a first transfer section 204, a preliminary cleaning machine 1, a main cleaning machine 101, and a second transfer section 205. The preliminary soaking tank 203, the first transfer section 204, the preliminary cleaning machine 1, the main cleaning machine 101, and the second transfer section 205 are arranged in an L-shape when viewed from above.

[0018] The preliminary soaking tank 203 is a tank for storing water. In the preliminary soaking tank 203, preliminary washing (removal of attached matter, etc.) of tableware (items to be washed) D may be performed. The first transport unit 204 is disposed next to the preliminary soaking tank 203. The first transport unit 204 carries a tableware rack R into the washing chamber (first washing chamber) 3 of the preliminary washer 1. The tableware rack R is a lattice-shaped member on which tableware D such as plates and bowls are arranged. When the first transport unit 204 detects that the tableware rack R has been placed on the base 204a of the first transport unit 204, the arm member 204b moves to push the tableware rack R into the washing chamber 3 of the preliminary washer 1.

[0019] The preliminary washer 1 is a washer provided to wash away food residue and the like adhering to the surfaces of the tableware D prior to washing the tableware D in the main washer 101. In other words, the preliminary washer 1 is a washer that performs preliminary washing of the tableware D in the preliminary soaking tank 203, which has been performed manually.

[0020] 2, the spare cleaner 1 has a cleaner body 2 covered with a stainless steel panel. The cleaner body 2 is divided into an upper part 2A in which a cleaning chamber 3 is formed, and a lower part 2B in which a machine chamber 4 is formed. A support pillar 6 is disposed at a corner on the rear side of the cleaner body 2, extending vertically across the upper part 2A and the lower part 2B, and a rear panel 5 is disposed between the support pillars 6, 6.

[0021] A box-shaped door 7 for opening and closing the washing chamber 3 is provided on the upper part 2A of the washer body 2. The door 7 is guided by a pair of stainless steel supports 6, 6 so as to be movable up and down, and is moved up and down by a handle 8A extending horizontally at the front. The door 7 may be opened and closed automatically in conjunction with the transport of the first transport section 204. The door 7 may also be opened and closed automatically in conjunction with the completion of the washing operation of the tableware D.

[0022] The tips of a pair of left and right rotating arms 8B, 8B are fixed to both ends of the handle 8A, and the rotating arms 8B, 8B are arranged diagonally along the side surface 7A of the door 7. One end of a link portion 8C arranged along the side surface 7A of the door 7 is rotatably connected to the rotating arms 8B, 8B, and the other end of the link portion 8C is connected to the door 7 via a pivot pin 8D, so that the door 7 can move up and down in response to the rotational movement of the handle 8A. Legs 9 are attached to the four corners of the bottom surface of the washer body 2.

[0023] As shown in FIG. 3, a rack rail 11 is detachably arranged in the washing chamber 3, and a lattice-shaped dish rack R on which dishes D such as plates and bowls after eating are arranged is placed. An upper washing nozzle (first washing nozzle) 12A consisting of three arms 42 extending radially and an upper rinsing nozzle 13A consisting of two arms 76 are rotatably arranged in the upper part of the washing chamber 3. Similarly, a lower washing nozzle (first washing nozzle) 12B consisting of three arms 42 extending radially and a lower rinsing nozzle 13B consisting of two arms 76 are rotatably arranged in the lower part of the washing chamber 3. Washing water is sprayed from above and below the dishes D arranged on the dish rack R by the upper washing nozzle 12A and the lower washing nozzle 12B, and rinsing water is sprayed from above and below by the upper rinsing nozzle 13A and the lower rinsing nozzle 13B.

[0024] A cleaning pump 23 is connected to the front of the cleaning water tank 15 via a cleaning water suction port. A cleaning water discharge pipe 21 is connected to the discharge port of the cleaning pump 23. The cleaning water discharge pipe 21 branches into a first cleaning water discharge pipe 21A and a second cleaning water discharge pipe 21B, with the first cleaning water discharge pipe 21A being connected to the upper cleaning nozzle 12A and the second cleaning water discharge pipe 21B being connected to the lower cleaning nozzle 12B. A cleaning water heater 16 is provided in the cleaning water tank 15 for heating the cleaning water to improve cleaning and sterilizing capabilities.

[0025] A plate-shaped partition plate 18 is disposed at the upper opening of the washing water tank 15. The partition plate 18 is provided with two openings 18a, and a residue collection filter 19 is provided below the openings 18a. For ease of explanation, the residue collection filter 19 is not shown in Figs. 3 and 8. The residue collection filter 19 is formed in a basket shape, and its sides and bottom are formed of a mesh member. Residual food that flows into the residue collection filter 19 is received by the mesh member, and water that flows into the residue collection filter 19 passes through the mesh member and flows into the washing water tank 15. That is, the water sprayed from the upper washing nozzle 12A and the lower washing nozzle 12B is collected in the washing water tank 15.

[0026] A first drain pipe 33 is connected to the bottom surface 15a of the flush water tank 15. The bottom surface 15a is inclined toward the first drain pipe 33. A drain valve 34 is provided in the first drain pipe 33. The drain valve 34 is a so-called ball valve type valve, and a ball, which is a valve body arranged in the water flow path of the first drain pipe 33, is rotated by the drive of a motor to stop or flow the flow of water in the first drain pipe 33. The drain valve 34 is controlled by a controller 35, and the valve body of the drain valve 34 is opened to drain the water stored in the flush water tank 15. An end opening 17a of the second drain pipe (drainage section) 17 is connected to the side surface 15b of the flush water tank 15. The second drain pipe 17 functions as an overflow pipe that drains water that exceeds a predetermined water level H in the flush water tank 15. The food residue collection filter 19 is arranged so that the bottom surface 19a of the food residue collection filter 19 is located at a position H1 above the predetermined water level H.

[0027] A rinsing water tank 25 is disposed in the machine room 4, to which rinsing water is supplied from the outside via a water supply pipe 25A. A rinsing pump 27 is connected to the rinsing water tank 25 via a rinsing water suction pipe 29. A rinsing water discharge pipe 31 is connected to the discharge port of the rinsing pump 27. The rinsing water discharge pipe 31 branches into a first rinsing water discharge pipe 31A and a second rinsing water discharge pipe 31B, with the first rinsing water discharge pipe 31A being connected to the upper rinsing nozzle 13A and the second rinsing water discharge pipe 31B being connected to the lower rinsing nozzle 13B.

[0028] The upper washing nozzle 12A and the lower washing nozzle 12B will be described in detail. Here, the lower washing nozzle 12B of the spare washing machine 1 will be described as an example. As shown in FIG. 6, the lower washing nozzle 12B is clamped by a lower nozzle header 61 and a lower nozzle nut 62 so as to be rotatable about a rotation axis. The lower nozzle header 61 is provided so as to surround the outer circumferential surfaces of the upper ends of the above-mentioned second washing water discharge pipe 21B and second rinsing water discharge pipe 31B. The second washing water discharge pipe 21B includes the second rinsing water discharge pipe 31B and has a double pipe configuration. That is, in the second washing water discharge pipe 21B, the flow path S1 of the water pumped from the washing pump 23 is formed in an annular shape.

[0029] 5(A) and 6, the lower cleaning nozzle 12B has a holder 41 sandwiched between a lower nozzle header 61 and a lower nozzle nut 62, and three arms 42 extending radially from the holder 41. A circular through-hole 41A is formed in the holder 41. A lower nozzle nut 62 is attached to an upper opening of the through-hole in the lower cleaning nozzle 12B, and a lower nozzle header 61 is attached to a lower opening of the through-hole 41A. As a result, the annular flow path S1 (see FIG. 6) communicates with the through-hole 41A of the holder 41, and water is supplied to an inner space S2, which will be described later.

[0030] As shown in Fig. 7, a circular orifice plate 71 is disposed at the downstream end of the second cleaning water discharge pipe 21B. The orifice plate 71 is disposed so that its outer edge contacts the inner peripheral surface of the second cleaning water discharge pipe 21B and its inner edge is spaced apart from the outer peripheral surface of the second rinsing water discharge pipe 31B. The orifice plate 71 narrows (throttles) the width (cross-sectional area) of the flow path S1 formed in the above-mentioned circular shape, thereby suppressing the amount of water flowing from the second cleaning water discharge pipe 21B to the lower cleaning nozzle 12B. Although not shown, a similar orifice plate 71 is also disposed in the water supply path from the first cleaning water discharge pipe 21A to the upper cleaning nozzle 12A, suppressing the amount of water flowing from the first cleaning water discharge pipe 21A to the upper cleaning nozzle 12A.

[0031] In addition, in this cleaning machine 101, which will be described in detail later, the water supply path from the second cleaning water discharge pipe 21B to the lower cleaning nozzle (second cleaning nozzle) 112B and the water supply path from the first cleaning water discharge pipe 21A to the upper cleaning nozzle (second cleaning nozzle) 112A are not provided with an orifice plate 71. Therefore, in this cleaning machine 101, the amount of water flowing from the second cleaning water discharge pipe 21B to the lower cleaning nozzle 112B and the amount of water flowing from the first cleaning water discharge pipe 21A to the upper cleaning nozzle 112A are not restricted.

[0032] As shown in Fig. 3, Fig. 5(A) and Fig. 5(B), the arm 42 of the lower cleaning nozzle 12B extends in a substantially horizontal direction perpendicular to the rotation axis direction, and has an internal space S2 that is a flow path for water to be sprayed from the spray part 43. The arm 42 is formed with the spray part 43 from which water is sprayed. As shown in Fig. 3, the arm 42 of the upper cleaning nozzle 12A also has a similar configuration to the lower cleaning nozzle 12B. In the cleaning system 200 of this embodiment, the number of spray parts 43 of the lower cleaning nozzle 12B provided in the spare cleaning machine 1 is different from the number of spray parts 143 provided in the lower cleaning nozzle 112B of the main cleaning machine 101.

[0033] Specifically, the number of jetting portions 43 (see FIG. 5(A)) formed on the arm 42 of the lower cleaning nozzle 12B of the spare cleaning machine 1 is three, whereas the number of jetting portions 143 (see FIG. 5(C)) formed on the arm 42 of the lower cleaning nozzle 112B of the main cleaning machine 101 is four. Similarly, although not shown, the number of jetting portions 43 formed on the arm 42 of the upper cleaning nozzle 12A of the spare cleaning machine 1 is three, whereas the number of jetting portions 143 formed on the arm 42 of the upper cleaning nozzle 112A of the main cleaning machine 101 is four.

[0034] As shown in Fig. 5(A) and Fig. 5(B), the spray section 43 formed in the preliminary cleaning machine 1 is provided with a spray hole 44 from which water is sprayed, and a spray pattern forming section 45 that forms a spray pattern of water sprayed from the spray hole 44. The spray pattern forming section 45 is provided on the downstream side of the spray hole 44 and has a shape that spreads in a V-shape toward the downstream direction. The spray pattern forming section 45 is a section that sprays water from the spray hole 44 in a wide range (wide angle). Similarly, although not shown, the spray section 43 formed in the arm 42 of the upper cleaning nozzle 12A has the same configuration as the spray section 43 of the lower cleaning nozzle 12B. In contrast to the lower cleaning nozzle 12B and the upper cleaning nozzle 12A of the preliminary cleaning machine 1 in which such a spray pattern forming section 45 is formed, the arm 142 of the lower cleaning nozzle 112B and the upper cleaning nozzle 112A of the main cleaning machine 101 has a spray hole 144 formed on the surface of the convex section 145. That is, the lower cleaning nozzle 112B and the upper cleaning nozzle 112A are not provided with a spray pattern forming portion that spreads in a V-shape downstream on the downstream side of the injection hole 144.

[0035] The injection hole 144 formed in the arm 142 of the present cleaning machine 101 is formed in an elongated hole shape. As shown in Fig. 5(C), there may be an injection part 143 (convex part 145) in which not only one but two injection holes 144 are provided. In the lower cleaning nozzle 112B and the upper cleaning nozzle 112A of the present cleaning machine 101, instead of the configuration of the spray pattern forming part 45 provided in the lower cleaning nozzle 12B and the upper cleaning nozzle 12A of the spare cleaning machine 1 as described above, the opening shape of the injection hole 144 is made elongated, thereby widening the injection range of water injected from the injection hole 144. Due to the difference between the configurations of the lower cleaning nozzle 12B and the upper cleaning nozzle 12A of the spare washer 1 and the configurations of the lower cleaning nozzle 112B and the upper cleaning nozzle 112A of the main washer 101, in the spare washer 1, high-pressure water that is diffused over a wide area from the spray holes 44 is applied to the tableware D, whereas in the main washer 101, a large volume of water is sprayed directly over a wide area from the spray holes 144 onto the tableware D.

[0036] As described above, the opening area of ​​the jet holes 44 formed in the arm 42 of the spare cleaner 1 is smaller than the opening area of ​​the jet holes 144 formed in the arm 142 of the main cleaner 101, so that the jet pressure of the water jetted from the jet holes 44 is greater than the jet pressure of the water jetted from the jet holes 144. The ratio of the jet pressure of the lower cleaning nozzle 12B of the spare cleaner 1 to the jet pressure of the lower cleaning nozzle 112B of the main cleaner 101 is 1.5 or more, and the ratio of the jet pressure of the upper cleaning nozzle 12A of the spare cleaner 1 to the jet pressure of the upper cleaning nozzle 112A is also 1.5 or more.

[0037] In the spare washer 1, the lower washing nozzle 12B is disposed closer to the tableware D contained in the washing chamber 3 than the upper washing nozzle 12A. For this reason, it is preferable to increase the spray pressure of the lower washing nozzle 12B in the spare washer 1 to increase the force of water and improve the ability to scrape off food residue from the tableware D. On the other hand, the upper washing nozzle 12A (112A) is disposed farther from the tableware D contained in the washing chamber 3 than the lower washing nozzle 12B (112B), so that even if the spray pressure of the upper washing nozzle 12A is increased, the force of the water weakens before it reaches the tableware D. For this reason, the spray pressure of the upper washing nozzle 12A may be adjusted so that the force of water is strong enough to press down the tableware D from above so that the tableware D is not lifted by the water sprayed from the lower washing nozzle 12B.

[0038] In the spare washer 1, water is pumped from one washing pump 23 to the upper washing nozzle 12A and the lower washing nozzle 12B. Since the water supply capacity of the washing pump 23 is fixed, it is preferable to appropriately allocate the water supply to the upper washing nozzle 12A and the water supply to the lower washing nozzle 12B. Taking these factors into consideration overall, it is preferable that the ratio of the jet pressure of the lower washing nozzle 12B of the spare washer 1 to the jet pressure of the lower washing nozzle 112B of the main washer 101 is set to 3.0 or more and 4.0 or less, and the ratio of the jet pressure of the upper washing nozzle 12A of the spare washer 1 to the jet pressure of the upper washing nozzle 112A of the main washer 101 is set to 1.5 or more and 2.0 or less.

[0039] In the washing operation in the spare washer 1 and the main washer 101, water stored in the washing water tank 15 is supplied to the upper washing nozzle 12A and the lower washing nozzle 12B by the washing pump 23. Then, the water sprayed from the upper washing nozzle 12A and the lower washing nozzle 12B into the washing chamber 3 flows into the residue collection filter 19 from the opening 18a of the partition plate 18, passes through the mesh member of the residue collection filter 19, and flows into the washing water tank 15. The water that flows into the washing water tank 15 is supplied to the upper washing nozzle 12A and the lower washing nozzle 12B by the washing pump 23, and is sprayed again into the washing chamber 3. Thus, in the washing operation in the spare washer 1 and the main washer 101, water is circulated and supplied to the washing water tank 15. The amount of circulating water per unit time during the washing operation in the spare washer 1 is less than the amount of circulating water per unit time during the washing operation in the main washer 101.

[0040] The difference between the amount of circulating water in the preliminary washer 1 in this embodiment and the amount of circulating water in the main washer 101 is caused by the above-mentioned differences in configuration, i.e., the presence or absence of an orifice plate 71 at the downstream end of the second washer discharge pipe 21B, and the total number of jet holes 44 (jet holes 144) formed in the arm 42 and the opening area of ​​the jet holes 44 (jet holes 144) (i.e., the total opening area per nozzle), when, for example, the characteristics of the flow paths (pipe diameter, pipe material, etc.) forming the circulation paths of both and the capacity of the washer pump 23 are the same. In this embodiment, due to the above-mentioned differences in configuration, the amount of circulating water per unit time during the washer operation in the preliminary washer 1 is 1 / 3 to 1 / 2 of the amount of circulating water per unit time during the washer operation in the main washer 101.

[0041] As shown in Fig. 6, the lower rinsing nozzle 13B has an inner tube 74 that is inserted into the through hole of the lower nozzle nut 62 and inserted into the lower nozzle header 61, a holder 75 connected to the inner tube 74, and two arms 76 that extend from the holder 75 in a direction perpendicular to the axial direction. The lower rinsing nozzle 13B is rotatably held by the lower nozzle nut 62 and the screw cap 63. Rinse water is supplied to the arm 76 through the first rinsing water discharge pipe 31A, the inner tube 74, and the holder 75, and is sprayed from the spray part 77 of the arm 76. The spray part 77 has a spray hole 78 and a spray pattern forming part 79 that are configured similarly to the lower washing nozzle 12B shown in Fig. 5(A).

[0042] The machine room 4 accommodates an electrical equipment box (not shown) incorporating a controller 35 for controlling the overall operation of the preliminary washer 1, and the like.

[0043] Next, the present washer 101 will be described. The present washer 101 washes the tableware D that has been pre-washed in the spare washer 1. The present washer 101 has the same configuration as the spare washer 1 except for the above-mentioned points (the presence or absence of the orifice plate 71 and the configuration of the jetting section 143). That is, in Figs. 8 and 9, the components of the present washer 101 designated by the same reference numerals as the components constituting the spare washer 1 have the same functions as the components constituting the spare washer 1. Note that the washing chamber (second washing chamber) 103 and the washing water tank (second washing water tank) 115 have the same functions as the washing chamber 3 and the washing water tank 15 of the spare washer 1, although they are designated by different reference numerals.

[0044] Next, the operation of the washing system 200 will be described. When the power switch of the spare washer 1 is turned on, the rinsing pump 27 sprays the warm water in the rinsing water tank 25 of the spare washer 1 into the washing chamber 3 through the upper rinsing nozzle 13A and the lower rinsing nozzle 13B, thereby supplying warm water into the washing water tank 15. When the power switch of the main washer 101 is turned on, the rinsing pump 27 sprays the warm water in the rinsing water tank 25 of the main washer 101 into the washing chamber 3 through the upper rinsing nozzle 113A and the lower rinsing nozzle 113B, thereby supplying warm water into the washing water tank 15. The temperature of the warm water in the rinsing water tank 25 of the spare washer 1 and the main washer 101 is set to, for example, about 80°C. As a result, initial hot water supply is performed in the main washer 101 and the spare washer 1. Then, an amount of detergent corresponding to the amount of initial hot water supply is supplied into the washing water tank 15, and the detergent concentration of the washing water in the washing water tank 15 becomes a predetermined concentration.

[0045] In addition, instead of supplying water to the cleaning chamber 3 via the upper rinsing nozzle 13A (or the upper rinsing nozzle 113A) and the lower rinsing nozzle 13B (or the lower rinsing nozzle 113B), a dedicated hot water supply pipe may be provided to supply water.

[0046] After the initial hot water supply, when the user places the dish rack R on the base 204a of the first transport unit 204, the first transport unit 204 detects that the dish rack R has been placed on the base 204a and starts pushing the dish rack R into the spare washer 1 with the arm member 204b. When it is detected that the dish rack R has been carried into the washing chamber 3 of the spare washer 1 and the door 7 has been closed, an operation start signal is input to the controller 35. When the operation start signal is input to the controller 35, the washing operation (washing process and rinsing process) of the dishes D in the spare washer 1 is started. The washing process of the dishes D is performed by spraying the washing water in the washing water tank 15 toward the dishes D in the washing chamber 3. The temperature of the washing water in the washing water tank 15 is set to be, for example, 60°C to 70°C.

[0047] When the washing pump 23 starts, the washing water stored in the washing water tank 15 is pumped through the washing water discharge pipe 24 and the like to the upper washing nozzle 12A and the lower washing nozzle 12B, and is sprayed from the upper washing nozzle 12A and the lower washing nozzle 12B toward the dishes in the washing chamber 3. The washing water sprayed from the upper washing nozzle 12A and the lower washing nozzle 12B into the washing chamber 3 peels off leftover food and dirt (hereinafter also referred to as "leftover food, etc.") from the dishes, flows into the opening 18a together with the washing water, and is collected in the basket-shaped leftover food collection filter 19. The washing water collected in the washing water tank 15 is circulated and supplied again to the washing chamber 3 by the washing pump 23. When the dishes are washed with the washing water for a predetermined time, the operation of the washing pump 23 is stopped. This causes the operation of the preliminary washer 1 to be temporarily suspended.

[0048] Next, the process of rinsing the tableware D is started. The process of rinsing the tableware D is performed by spraying the rinsing water in the rinsing water tank 25 toward the tableware D in the washing chamber 3. When the rinsing pump 27 in the preliminary washer 1 starts, the rinsing water stored in the rinsing water tank 25 is pumped through the rinsing water discharge pipe 31 and the like to the upper rinsing nozzle 13A and the lower rinsing nozzle 13B, and is sprayed toward the tableware from the upper rinsing nozzle 13A and the lower rinsing nozzle 13B. The temperature of the rinsing water pumped from the rinsing water tank 25 is set to, for example, around 80°C.

[0049] In the rinsing step, the rinsing water collected in the rinsing water tank 15 is mixed with the washing water and used as the washing water in the next washing step. The opening time of the valve body (ball) of the drain valve 34 is adjusted so that a portion of the water newly supplied in the rinsing step is discharged via the first drain pipe 33, and the remaining water is discharged from the opening 17a via the second drain pipe 17. When a predetermined rinsing time has elapsed, the rinsing step ends, and the series of washing operations in the spare washer 1 ends.

[0050] When the washing operation in the spare washer 1 is completed, the door 7 of the spare washer 1 opens, and the first transport section 204 pushes the next dish rack R into the washing chamber 3 of the spare washer 1, so that the dish rack R that has been washed is pushed into the main washer 101 in a domino effect. As a result, the dish rack R washed in the spare washer 1 is carried into the washing chamber 3 of the main washer 101. When the dish rack R is carried into the washing chamber 3 of the main washer 101, the door 7 of the main washer 101 is closed. When the door 7 of the main washer 101 is closed, an operation start signal is input to the controller 35. When the operation start signal is input to the controller 35, the washing operation of the main washer 101 for washing dishes D is started. The dishes D are washed by spraying the washing water in the washing water tank 15 toward the dishes in the washing chamber 3. The temperature of the washing water in the washing water tank 15 is set to be, for example, 60°C to 70°C.

[0051] When the cleaning pump 23 starts, the cleaning water stored in the cleaning water tank 15 is pressurized to the upper cleaning nozzle 112A and the lower cleaning nozzle 112B via the cleaning water discharge pipe 24 etc., and is sprayed from the upper cleaning nozzle 112A and the lower cleaning nozzle 112B toward the dishes in the cleaning chamber 3.

[0052] The wash water sprayed into the washing chamber 3 is collected in the wash water tank 15. The tableware D washed in the main washer 101 has had most of the leftover food and other debris removed in the spare washer 1. Therefore, the wash water collected in the wash water tank 15 is relatively clean water. The wash water collected in the wash water tank 15 is circulated and supplied back into the washing chamber 3 by the wash pump 23. After the tableware has been washed with the wash water for a predetermined time, the operation of the wash pump 23 is stopped. This causes the operation of the main washer 101 to temporarily pause.

[0053] Next, the rinsing pump 27 is started, and the rinsing water stored in the rinsing water tank 25 is pumped through the rinsing water discharge pipe 31 and the like to the upper rinsing nozzle 13A and the lower rinsing nozzle 13B, and sprayed toward the dishes from the upper rinsing nozzle 13A and the lower rinsing nozzle 13B. The temperature of the rinsing water pumped from the rinsing water tank 25 is set to, for example, about 80°C.

[0054] In the rinsing step, the rinsing water collected in the rinsing water tank 15 is mixed with the washing water and used as the washing water in the next washing step, similarly to the above-mentioned preliminary washer 1. The opening time of the valve body (ball) of the drain valve 34 is adjusted so that a portion of the water newly supplied in the rinsing step is discharged via the first drain pipe 33, and the remaining water is discharged from the opening 17a via the second drain pipe 17. When a predetermined rinsing time has elapsed, the rinsing step ends, and the series of washing operations in this washer 101 ends.

[0055] The above-mentioned predetermined time is appropriately set based on the storage amount of the washing water tank 15 and the rinsing water tank 25, the water delivery capacity of the washing pump 23 and the rinsing pump 27, and the like.

[0056] Next, the effects of the washing system 200 of this embodiment will be described. In the washing system 200 of the above embodiment, the preliminary washing is performed by the spare washer 1 to wash away leftover food from the tableware D, and the main washer 101 can perform the main washing of the tableware D from which leftover food has been removed. The spray pressure of the upper washing nozzle 12A and the lower washing nozzle 12B of the spare washer 1 is greater than the spray pressure of the upper washing nozzle 112A and the lower washing nozzle 112B of the main washer 101, so that the spare washer 1 has an excellent ability to peel off leftover food adhering to the tableware D from the tableware D. Therefore, the spare washer 1 can more effectively remove leftover food adhering to the tableware D.

[0057] In the washing system 200 of this embodiment, the ratio of the spray pressure of the upper washing nozzle 12A and the lower washing nozzle 12B of the spare washer 1 to the spray pressure of the upper washing nozzle 112A and the lower washing nozzle 112B of the main washer 101 is 1.5 or more. Therefore, compared to the main washer 101, the spare washer 1 has a superior ability to peel off food residue adhering to the dishes D from the dishes D.

[0058] In the cleaning system 200 of this embodiment, the opening area of ​​the jet holes 44 in the upper cleaning nozzle 12A and the lower cleaning nozzle 12B of the spare cleaning machine 1 is smaller than the opening area of ​​the jet holes 144 in the upper cleaning nozzle 112A and the lower cleaning nozzle 112B of the main cleaning machine 101, so the jet pressure of the upper cleaning nozzle 12A and the lower cleaning nozzle 12B of the spare cleaning machine 1 can be made higher than the jet pressure of the upper cleaning nozzle 112A and the lower cleaning nozzle 112B of the main cleaning machine 101. This makes it possible to make the amount of water jetted per unit time from one jet hole 44 smaller than the amount of water jetted per unit time from one jet hole 144.

[0059] In the preliminary washer 1 of the washing system 200 of this embodiment, as shown in Figure 5 (B), a spray pattern forming section 45 that spreads out in a V shape toward the downstream direction is provided downstream of the injection hole 44 in the water injection direction, so that water is sprayed over a wide range (wide angle) from the injection hole 44, and the tableware D contained in the washing chamber 3 can be pre-washed evenly.

[0060] When the residue collection filter 19 of the spare washer 1 is immersed in the stored water of the wash water tank 15, the flow of stored water caused by the suction of the wash pump 23 causes the residue to stick to the mesh member of the residue collection filter 19, preventing the water sprayed from the upper wash nozzle 12A and the lower wash nozzle 12B from flowing into the wash water tank 15 via the residue collection filter 19 (from being collected in the wash water tank 15). Since the spare washer 1 is specialized in the function of scraping off residue adhering to the tableware D, there is a high possibility of such an event occurring. When such an event occurs, the amount of storage in the wash water tank 15 decreases, and air may be trapped in the wash pump 23 that supplies the water stored in the wash water tank 15 to the upper wash nozzle 12A and the lower wash nozzle 12B. This air entrapment can cause the washing pump 23 to break down, making it necessary to periodically remove the food residue from the food residue collection filter 19. However, the increased frequency of this work reduces the operating rate of the spare washer 1 and places a burden on the operator.

[0061] In the washing system 200 of this embodiment, the amount of circulating water per unit time during washing operation in the spare washer 1 is set to be less than the amount of circulating water per unit time during washing operation in the main washer 101, so that the amount of stored water in the washing water tank 15 in the spare washer 1 can be made less than the amount of stored water in the washing water tank 15 in the main washer 101. That is, the stored water level in the washing water tank 15 in the spare washer 1 can be relatively lowered. This makes it possible to ensure a distance between the bottom surface 19a of the residue collection filter 19 and the water level of the stored water in the washing water tank 15 without structurally improving the spare washer 1. As a result, the frequency with which the residue collection filter 19 is immersed in the stored water in the washing water tank 15 is reduced, so that the frequency of removing residue from the residue collection filter 19 can be reduced, which in turn increases the availability of the spare washer 1 and reduces the burden on the operator.

[0062] As shown in Figure 4, the washing water tank 15 of the spare washer 1 of the washing system 200 of this embodiment is provided with a second drain pipe 17 for draining water that exceeds a predetermined water level in the washing water tank 15, and the residue collection filter 19 is positioned so that the bottom surface 19a of the residue collection filter 19 is positioned H1 above the predetermined water level H, thereby preventing the residue collection filter 19 from being immersed in the stored water in the washing water tank 15.

[0063] If the size of the height direction of the residue collection filter 19 can be maximized to match the specified water level (overflow water level) of the washing water tank 15, the flow of water sprayed from the upper washing nozzle 12A and the lower washing nozzle 12B into the washing water tank 15 via the residue collection filter 19 is not easily hindered. This increases the time until air entrapment occurs due to the washing pump 23 as described above, so the frequency of removing residue from the residue collection filter 19 can be reduced, reducing the burden on the worker. Furthermore, since the residue collection filter 19 is not immersed in the stored water of the washing water tank 15, contamination of the washing water due to softening of the residue can be suppressed. Furthermore, dripping from the collected residue when removing the residue collection filter 19 can be suppressed.

[0064] In the spare washer 1 of the washing system 200 of this embodiment, the drain valve 34 forcibly drains the wash water tank 15 via the wash water tank 15 connected to the bottom surface 15a of the wash water tank 15. This allows dirt that tends to stay at the bottom and small objects that settle to be discharged from the wash water tank 15, making it possible to prevent the wash water from becoming contaminated.

[0065] Although the embodiment of the present invention has been described above, the present invention is not necessarily limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention.

[0066] In the present washer 101 of the washer system 200 of the embodiment described above, an example was given in which the first drain pipe 33 connected to the bottom surface 15a of the flush water tank 15, the drain valve 34 provided in the first drain pipe 33, and the second drain pipe 17 connected to the side surface 15b of the flush water tank 15 are provided, as in the spare washer 1, but the present embodiment is not limited to this configuration. For example, instead of the configuration of the first drain pipe 33, the drain valve 34, and the second drain pipe 17, a configuration may be provided in which an overflow pipe is detachably provided in a drain port formed in the bottom surface 15a of the flush water tank 15 and extends vertically upward. The overflow pipe drains water that exceeds a specified water level from its upper end, and when the overflow pipe is removed from the drain port, all of the water stored in the flush water tank 15 can be drained.

[0067] In the above embodiment of the spare washer 1 and main washer 101 of the washing system 200, an example has been described in which the water stored in the washing water tank 15 is drained using the drain valve 34, but instead of the drain valve 34, the water stored in the washing water tank 15 may be drained using a drain pump.

[0068] In the above embodiment and modified example of the washing system 200, an example has been given in which the first transport unit 204 moves the dish rack R to the spare washer 1 and from the spare washer 1 to the main washer 101, and the second transport unit 205 moves the dish rack R from the main washer 101, but each of the above movements may also be performed by an operator.

[0069] The above embodiment and modified example of the spare washer 1 and the main washer 101 have been described using as an example a type of washer in which the door 7 is arranged so as to be freely movable in the vertical direction, but the invention can also be applied to, for example, a dishwasher or the like in which the door 7 is arranged on the front side of the washer body 2, such as an oven.

[0070] In the above embodiment and modified example, a configuration is described in which the residue collection filter 19 and the second drain pipe 17 are provided in the same configuration as the spare washer 1, but the present invention is not limited to this. Since the dishes D to be washed in the present washer 101 have had residue removed in advance by the spare washer 1, air entrapment as described above rarely occurs. For this reason, the bottom surface 19a of the residue collection filter 19 of the present washer 101 may be configured to be immersed in the stored water in the wash water tank 115.

[0071] In the above embodiment and modified example, the washing system 200 in which the preliminary washer 1 for performing preliminary washing on the tableware D and the main washer 101 for performing main washing, which is separate from the preliminary washer 1, are arranged side by side has been described as an example, but the present invention is not limited thereto. For example, the present invention may be applied to a type of washer having a single housing, but having a preliminary washing chamber for performing preliminary washing and a main washing chamber for performing main washing, and moving the tableware D from the preliminary washing chamber to the main washing chamber by a conveyor or the like. That is, a washing nozzle having a configuration as shown in FIG. 5(A) may be arranged in the preliminary washing chamber, and a washing nozzle having a configuration as shown in FIG. 5(C) may be arranged in the main washing chamber. Similarly, a washing water tank provided with a residue collecting filter 19 and a second drain pipe 17 having the same configuration as the preliminary washer 1 may be arranged in the preliminary washing chamber.

[0072] In the present invention, the contents described as the above-described embodiment, the above-described modification, and other modification may be appropriately combined without departing from the spirit of the invention. [Explanation of symbols]

[0073] 1... spare washer, 3... washing chamber, 12A... upper washing nozzle (first washing nozzle), 12B... lower washing nozzle (first washing nozzle), 15... washing water tank, 15a... bottom, 17... second drain pipe (drainage section), 19... food residue collection filter, 19a... bottom, 23... washing pump, 33... first drain pipe, 35... controller, 42... arm, 43... spray section, 44... spray hole, 45... spray pattern forming section, 71... orifice plate, 101... main washer, 112A... upper washing nozzle (second washing nozzle), 112B... lower washing nozzle (second washing nozzle), 143... spray section, 144... spray hole, 200... washing system, R... dish rack, H... specified water level.

Claims

1. a preliminary washer including a first washing nozzle for spraying water into a first washing chamber that contains an object to be washed, and a first washing water tank for storing water to be supplied to the first washing nozzle and recovering the water sprayed by the first washing nozzle; a main cleaning machine having a second cleaning nozzle for spraying water into a second cleaning chamber that contains an object to be cleaned, and a second cleaning water tank for storing water to be supplied to the second cleaning nozzle and recovering the water sprayed by the second cleaning nozzle, and for cleaning the object to be cleaned that has been cleaned in the preliminary cleaning machine; The pre-washing machine further includes a residue collection filter that is disposed below the position where the object to be washed is accommodated and that collects residue adhering to the object to be washed and that falls together with the water sprayed from the first washing nozzle. the jet pressure of the first cleaning nozzle is greater than the jet pressure of the second cleaning nozzle, A washing system, wherein the amount of circulating water per unit time during a washing operation in the preliminary washing machine is less than the amount of circulating water per unit time during a washing operation in the main washing machine.

2. a preliminary washer including a first washing nozzle for spraying water into a first washing chamber that contains an object to be washed, and a first washing water tank for storing water to be supplied to the first washing nozzle and recovering the water sprayed by the first washing nozzle; a main cleaning machine having a second cleaning nozzle for spraying water into a second cleaning chamber that contains an object to be cleaned, and a second cleaning water tank for storing water to be supplied to the second cleaning nozzle and recovering the water sprayed by the second cleaning nozzle, and for cleaning the object to be cleaned that has been cleaned in the preliminary cleaning machine; The pre-washing machine further includes a residue collection filter that is disposed below the position where the object to be washed is accommodated and that collects residue adhering to the object to be washed and that falls together with the water sprayed from the first washing nozzle. the jet pressure of the first cleaning nozzle is greater than the jet pressure of the second cleaning nozzle, A cleaning system, wherein an opening area of ​​an injection hole in the first cleaning nozzle is smaller than an opening area of ​​an injection hole in the second cleaning nozzle.

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