JP2018201604A - washing machine - Google Patents

Abstract

To provide a washing machine capable of performing efficient heat exchange.SOLUTION: A conveyor-type tableware washing machine 1 includes: a washing tank 10 for temporarily pooling water at least used for washing tableware 3, a discharge water heat recovery device 50 for performing heat exchange between water flowing through a discharge water flow channel C1 and water flowing through a water supply flow channel C2, which includes the water supply flow channel for supplying water to a rinsing tank 91 for pooling water used for rinsing the tableware, and the discharge water flow channel through which water from the washing tank is discharged; and a housing 7 having a washing chamber R1 for holding the tableware and a machine chamber R2 installed below the washing chamber. The discharge water heat recovery device is disposed on a side of the washing tank so that the discharge water flow channel is along a vertical direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a washing machine for washing an object to be washed such as tableware.

  A washing machine having a waste heat recovery device for exchanging heat between water supply supplied for washing and rinsing dishes in the washing room and waste water discharged from the washing room at that time Are known. A washing machine including such a waste heat recovery device is disclosed in, for example, Patent Document 1. The washing machine of Patent Document 1 has a machine room in which a device such as a pump is housed below a washing room for washing dishes, and a part of the waste heat recovery device is disposed in the machine room. Yes. Furthermore, the waste heat recovery apparatus of Patent Document 1 is disposed directly below a cleaning tank that stores cleaning water for cleaning an object to be cleaned.

Japanese Patent Laying-Open No. 2015-123349

  However, the machine room that is provided below the cleaning chamber and in which a part of the cleaning tank and a device such as a pump are installed has no room for the space below the cleaning tank. For this reason, like patent document 1, it may be arranged in the state where a part of drainage heat recovery device protruded outside the washing room. Since the outside temperature of the washing machine is lower than that of the machine room, the heat exchange efficiency is deteriorated.

  Then, the objective of this invention is providing the washing machine which enables efficient heat exchange.

  The cleaning machine of the present invention includes at least a cleaning tank that temporarily stores water used for cleaning an object to be cleaned, and a water supply passage that supplies water to a rinsing tank that stores water used for rinsing the cleaning object. A drainage flow path for discharging water from the cleaning tank, and a waste heat recovery device for exchanging heat between the water flowing through the drainage flow path and the water flowing through the water supply flow path, and the object to be cleaned And a housing having a machine room arranged below the washing room, and the waste heat recovery device is arranged on the side of the washing tank so that the drain flow path is along the vertical direction. ing.

  In the washing machine having this configuration, since the waste heat recovery device is accommodated in the machine room, the waste heat recovery device is disposed in a region where the ambient temperature is higher than that in the case where the waste heat recovery device is disposed outside the machine room. Thereby, efficient heat exchange becomes possible. Furthermore, since the waste heat recovery device is disposed on the side of the cleaning tank in which relatively high temperature cleaning water is stored, it is disposed at a high atmospheric temperature in the machine room. These synergistic effects enable efficient heat exchange. The phrase “so that the drainage channel is along the vertical direction” includes that the drainage channel is arranged in a substantially vertical direction.

  In the washing machine of the present invention, the whole waste heat recovery apparatus may be accommodated in the machine room. As a result, the waste heat recovery device is disposed in a region having a higher atmospheric temperature than when all or part of the waste heat recovery device is disposed outside the machine room. Thereby, more efficient heat exchange becomes possible.

  In the cleaning machine of the present invention, water that flows out from the cleaning tank when the storage amount of the cleaning tank exceeds a predetermined specified value may be used as the water discharged to the drainage channel. Thereby, the water stored in the cleaning tank can be discharged with a simple configuration.

  In the washing machine of the present invention, the drainage flow path includes a main body pipe extending along the vertical direction, and an inflow pipe that is connected to the main body pipe from a direction orthogonal to the vertical direction and into which water flows from the cleaning tank. And the inflow conduit may have an axis that is offset from an imaginary line orthogonal to the axis of the main body conduit. Thereby, the water flowing into the waste heat recovery device from the washing tank flows from the inflow conduit along the inner peripheral surface of the main body conduit so as to form a circular orbit (in a spiral shape), and flows down spirally. As a result, the way in which the water flowing into the waste heat recovery device hits the inner peripheral surface of the main body conduit is not partially biased, so that the heat exchange efficiency is increased. The “direction orthogonal to the vertical direction” herein includes a direction substantially orthogonal to the vertical direction.

  In the cleaning machine of the present invention, the waste heat recovery device may be disposed adjacent to at least one of the electrical equipment box in which the cleaning pump and the electrical components are accommodated. As a result, the waste heat recovery device is disposed adjacent to the cleaning pump and the electrical box serving as a heat source, thereby enabling more efficient heat exchange.

  In the cleaning machine of the present invention, the machine room is formed by a frame and an exterior panel that can be attached to and detached from the frame, and the waste heat recovery device is disposed adjacent to each other between the cleaning tank and the exterior panel. It may be. As a result, the waste heat recovery device is disposed adjacent to the cleaning tank serving as a heat source, so that more efficient heat exchange is possible. Moreover, since the maintenance of the waste heat recovery device can be performed by removing the exterior panel, the maintainability can be improved.

  In the washing machine of the present invention, the waste heat recovery device is a double pipe including a first pipeline that forms a drainage channel and a second pipeline that forms a water supply channel so as to surround the first pipeline. Also good. Thereby, in order to suppress pressure loss, the structure which enlarges the cross-sectional area of a water supply flow path can be formed easily.

  In the washing machine of the present invention, the second pipeline has an inflow portion and an outflow portion of water used for rinsing the washing object, and the waste heat recovery device is viewed from the axial direction of the first pipeline, A partition that is disposed between the inflow portion and the outflow portion in the circumferential direction of the second pipe line and partitions the water supply flow path by bringing the inner peripheral surface of the second pipe line into contact with the outer peripheral surface of the first pipe line May have a part. Thereby, the water supply which flows through a 2nd pipe line goes to an outflow part so that it may wrap around a 1st pipe line. As a result, the water that has flowed into the second pipeline is not discharged from the outflow portion in the shortest distance, and more efficient heat exchange is possible.

  The cleaning machine of the present invention further includes an overflow pipe provided in the cleaning tank and having an inflow hole at a position higher than the position where the drainage channel is connected in the cleaning tank and at a position lower than the upper surface of the cleaning tank. May be. In this configuration, for example, even when the drainage flow path of the drainage heat recovery apparatus is clogged, the water whose stored amount in the cleaning tank is equal to or greater than the specified value can be discharged from the overflow pipe.

  The cleaning machine of the present invention may further include a conveyor device that cleans the object to be cleaned while transporting it in the cleaning chamber. A conveyor-type dishwasher equipped with such a conveyor device is a washing machine premised on continuous operation, and therefore electric components such as a pump installed in a machine room are also continuously operated. For this reason, if a waste heat recovery apparatus is accommodated in the machine room of a conveyor type dishwasher, more efficient heat exchange can be performed.

  According to the present invention, efficient heat exchange can be achieved.

It is a perspective view of the conveyor type dishwasher which concerns on one Embodiment. It is a figure which shows schematic structure of the conveyor type dishwasher of FIG. It is the side view which looked at the dishwasher of FIG. 1 from the conveyance direction of tableware. It is the front view which looked at the machine room of the conveyor type dishwasher of FIG. 2 in the state which removed the exterior panel. It is a perspective view which shows the rack rail and conveyor apparatus of FIG. FIG. 5 is an exploded perspective view of the waste heat recovery apparatus shown in FIGS. 3 and 4. FIG. 6 is a side view of the waste heat recovery apparatus of FIG. 5. It is the top view which looked at the waste-water heat recovery apparatus of FIG. 5 from the axial direction of the main body pipe line.

  Hereinafter, a conveyor type dishwasher (washing machine) 1 according to an embodiment will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. The terms “front”, “rear”, and “left / right” below are based on the case where the transport direction of the rack 4 is “left / right direction” and the width direction orthogonal to the left / right direction is “front / rear direction”. .

  The conveyor-type dishwasher 1 is a device that performs cleaning while transporting a rack 4 for storing objects to be cleaned such as tableware (objects to be cleaned) 3. As shown in FIG. 1, on the left side of the conveyor type dishwasher 1, there is installed a soil table 5 for placing a rack 4 containing tableware (for example, a dish) 3 as a dirty object to be cleaned. Is provided with a clean table 6 on which a rack 4 containing the washed tableware 3 is placed.

  The casing 7 of the conveyor type dishwasher 1 is a box-shaped member formed of a material such as stainless steel, and as shown in FIGS. A space to be a machine room R2 disposed below the cleaning room R1 is formed. The housing 7 is supported by four legs 8.

  The casing 7 has a two-stage structure including an upper casing 7a having a cleaning chamber R1 and a lower casing 7b having a machine chamber R2. In the upper housing 7a, an inlet C and an outlet D through which the rack 4 can pass are formed on two surfaces (left surface and right surface) that are orthogonal to the transport direction (left-right direction) of the rack 4 and are opposed to each other. ing. The lower housing 7b is formed by a frame 7c and an exterior panel 7d that can be attached to and detached from the frame 7c. As shown in FIGS. 3 and 4, the exterior panel 7d is fixed to the frame 7c by a fitting structure or a bolt.

  Returning to FIGS. 1 and 2, the casing 7 is provided with a curtain 12 and a curtain 13. The upper end of the curtain 12 is fixed to the housing 7 so as to close the inlet C of the cleaning chamber R1. The upper end of the curtain 13 is fixed to the housing 7 so as to block the outlet D of the cleaning chamber R1. The curtain 12 and the curtain 13 are formed with strip-shaped cuts to allow the rack 4 to pass therethrough. On the front surface of the housing 7, an opening / closing door 9 that enables opening and closing of the cleaning chamber R <b> 1 is provided. The open / close door 9 is provided to facilitate maintenance such as cleaning of the cleaning chamber R1.

  As shown in FIG. 2, the cleaning chamber R <b> 1 is partitioned by a curtain 11. In the cleaning chamber R1, the cleaning region S1 is formed on the inlet C side and the rinsing region S2 is formed on the outlet D side with the curtain 11 in between. Like the curtain 12 and the curtain 13, the curtain 11 is formed with a strip-shaped cut so that the rack 4 can pass therethrough. In the cleaning chamber R1, a pair of rack rails 2 are provided in the front-rear direction so as to bridge between the soil table 5 and the clean table 6. The pair of rack rails 2, 2 extend along the transport direction of the rack 4.

  A pair of rack rails 2 is fixed to the lower housing 7b. As shown in FIG. 5, the rack rail 2 includes an upper plate 31 extending in the left-right direction, a side plate 32 orthogonal to the upper plate 31, and a lower plate 33 extending in parallel with the upper plate 31. A skirt piece 34 is provided at the free end of the upper plate 31. The upper surface 31a of the upper plate 31 is used as a rack sliding surface on which the bottom surface 4a of the rack 4 slides, and the upper surface 33a of the lower plate 33 is a roller rolling on which a guide roller 23 attached to the conveyor device 20 rolls. Used as a surface. A guide bar 37 that prevents a lateral shift of the rack 4 is fixed to the rack rail 2.

  The conveyor device 20 includes a frame body 20 </ b> A that extends along the rack rail 2. The frame body 20 </ b> A includes a first frame 21 that extends along the rack rail 2 and is parallel to each other, and a second frame 22 that bridges the end of the first frame 21. A guide roller 23 protruding in the horizontal direction is rotatably supported on the first frame 21. Two guide rollers 23 are provided before and after the first frame 21 and roll on the roller rolling surface of the rack rail 2.

  In the first frame 21, feed claws 24 that can be projected and retracted are arranged at predetermined intervals. Each feed claw 24 is configured to be swingable by a shaft portion 26 fixed to the first frame. Since the lower end side of the feeding claw 24 is heavy, the feeding claw 24 returns to the protruding state by its own weight. The frame 20A is connected to a rotating plate 28 that rotates eccentrically by a motor M (see FIG. 2). With such a configuration, the frame 20A reciprocates once every time the rotating plate 28 makes one rotation.

  When the frame body 20A moves forward, the feed claw 24 protrudes from the frame body 20A. As a result, the rack 4 is advanced by the tip of the feed claw 24 being hooked on the bottom rail. When the frame 20A moves backward, the feed claw 24 sinks into the frame 20A. Thereby, even if the frame 20A moves backward, the feed claw 24 is not caught on the rack 4, and the rack 4 does not move from that position. Next, when the frame body 20A moves forward, the feed claw 24 protruding from the frame body 20A is caught by the crosspiece at the bottom of the rack 4, and the rack 4 is moved forward. By repeating such an operation, the conveyor device 20 can send the rack 4 along the pair of rack rails 2 and 2 by a predetermined pitch in the transport direction.

  As shown in FIGS. 2 to 4, the upper cleaning nozzle 14, the lower cleaning nozzle 15, and the detergent supply nozzle 18 are arranged in the cleaning region S <b> 1 in the cleaning chamber R <b> 1. The upper cleaning nozzle 14 injects cleaning water from above the cleaning chamber R1. The detergent supply nozzle 18 supplies detergent to the cleaning tank 10. The upper cleaning nozzle 14 is connected to a first cleaning pump (cleaning pump) P <b> 1 through a water supply pipe 16. The lower cleaning nozzle 15 ejects cleaning water from below the cleaning chamber R1. The lower cleaning nozzle 15 is connected to a second cleaning pump (cleaning pump) P <b> 2 through a water supply pipe 17. The detergent supply nozzle 18 is connected to a detergent supply pump P4 via a detergent supply pipe 19.

  In the rinsing region S2 in the cleaning chamber R1, an upper rinsing nozzle 81 and a lower rinsing nozzle 82 are arranged. The upper rinsing nozzle 81 sprays rinsing water from above the cleaning chamber R1. The lower rinsing nozzle 82 sprays rinsing water from below the cleaning chamber R1. The upper rinsing nozzle 81 and the lower rinsing nozzle 82 are connected to a rinsing pump P3 via a water supply pipe 83. The upper rinse nozzle 81 and the lower rinse nozzle 82 are connected to a rinse agent supply device 85 that supplies a rinse agent to the water supply pipe 83.

  The machine room R2 is disposed below the cleaning room R1, and at least the cleaning pumps P1 and P2 for sending water from the cleaning tank 10 into the cleaning room R1 and the electrical box 40 in which electrical components are housed. In the machine room R2 of this embodiment, the cleaning tank 10, the first cleaning pump P1, the second cleaning pump P2, the rinsing pump P3, the detergent supply pump P4, the rinse agent supply device 85, the motor M, The waste heat recovery device 50 is disposed.

  The washing tank 10 temporarily stores washing water used for washing the tableware 3 housed in the washing room R1 and rinsing water used for rinsing (hereinafter collectively referred to as washing water). The cleaning tank 10 is formed with a suction port 10a of the first cleaning pump P1 and a suction port 10b of the second cleaning pump P2. In addition, an outlet 10c is formed through which excess water stored in the cleaning tank 10, that is, water that naturally flows out from the cleaning tank 10 when the amount stored in the cleaning tank 10 exceeds a predetermined specified value, is formed. . The outflow port 10c is connected to the inflow conduit 53a of the waste heat recovery device 50 described in detail later.

  The cleaning tank 10 is provided with a heater 75 for heating the cleaning water stored in the cleaning tank 10. Further, the cleaning tank 10 may be provided with a backup overflow pipe 71. The overflow pipe 71 extends in the vertical direction. The upper end of the overflow pipe 71 is set at a position slightly exceeding the water level (constant water level) maintained by discharging the stored water from the outlet 10 c and below the upper surface of the cleaning tank 10. The lower end of the overflow pipe 71 protrudes from the bottom surface 10 d of the cleaning tank 10 and is connected to a discharge pipe 61 that discharges cleaning water to the outside of the housing 7.

  If the drainage heat recovery device 50 is clogged for some reason, excess cleaning water in the cleaning tank 10 flows into the pipe from the inlet hole at the upper end of the overflow pipe 71 and is discharged to the outside. The overflow pipe 71 is configured to be removable from the cleaning tank 10. When the overflow pipe 71 is removed, the drain port 10e into which the overflow pipe 71 has been inserted is exposed to the bottom surface 10d of the cleaning tank 10. Thereby, the washing water in the washing tank 10 can be drained completely. The heater 75 heats the water stored in the cleaning tank 10. The heater 75 is fixed to the side surface 10 f of the cleaning tank 10.

  The first cleaning pump P1 and the second cleaning pump P2 are fixed to the lower housing 7b by appropriate members. The first cleaning pump P <b> 1 supplies the water stored in the cleaning tank 10 to the upper cleaning nozzle 14. The second cleaning pump P <b> 2 supplies water stored in the cleaning tank 10 to the lower cleaning nozzle 15. The rinsing pump P3 is fixed to the lower housing 7b by an appropriate member. The rinsing pump P3 supplies water stored in a rinsing tank 91 provided in a booster device 90 separate from the conveyor type dishwasher 1 to the upper rinsing nozzle 81 and the lower rinsing nozzle 82 of the conveyor type dishwasher 1. To supply. The rinsing tank 91 stores clean water heated to a temperature suitable for rinsing by a gas booster or an electric booster. In the rinsing tank 91, a suction port 91a of the rinsing pump P3 is formed.

  The detergent supply pump P4 and the rinse agent supply device 85 are fixed to the lower housing 7b by appropriate members. The detergent supply pump P4 supplies the detergent stored in the detergent tank (not shown) to the cleaning room R1. The rinse agent supply device 85 supplies a rinse agent stored in a rinse agent tank (not shown) to the cleaning chamber R1. The detergent tank and the rinse agent tank may be disposed inside the housing 7 or may be disposed outside the housing 7.

  The motor M is a motor that drives the conveyor device 20 described above. The motor M is arranged in a state accommodated in the electrical box 40 together with a circuit device that controls the motor M. The electrical box 40 further includes a microcomputer 45 that controls the overall operation of the conveyor type dishwasher 1. The microcomputer 45 is a computer system or processor mounted on an integrated circuit. The microcomputer 45 is connected to each other such as a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory). Various operation processes in the conveyor type dishwasher 1 are executed by the CPU, for example, by loading a program stored in the ROM onto the RAM.

  The waste water heat recovery device 50 is a device that exchanges heat between the water supplied to the rinsing tank 91 and the waste water discharged from the cleaning tank 10. As shown in FIG. 7, the waste heat recovery device 50 includes a water supply channel C <b> 2 that supplies water to a rinsing tank 91 that stores water used for rinsing the tableware 3, and a waste water from which water is discharged from the cleaning tank 10. And a heat exchange between the water flowing through the water supply channel C2 and the water flowing through the drainage channel C1. As shown in FIGS. 3 and 4, the waste heat recovery device 50 is disposed below the cleaning chamber R1, and from the rinsing pump P3 and the cleaning tank 10 for supplying water from the rinsing tank 91 into the cleaning chamber R1. The drainage channel C1 extends along the vertical direction in the machine chamber R2 in which the first cleaning pump P1 and the second cleaning pump P2 for sending water into the cleaning chamber R1 are arranged, and on the front side of the cleaning tank 10. Are arranged as follows.

  As shown in FIGS. 6 and 7, the waste heat recovery apparatus 50 includes a first pipeline 51 that forms the drain channel C 1 and a second water channel C 2 that surrounds the first pipeline 51. This is a double pipe including a pipe 55. The first pipe line 51 is formed with a main body pipe line 52 extending along the vertical direction, an axis A2 extending in a direction orthogonal to the vertical direction, and an inflow pipe line 53a into which water overflowed from the cleaning tank 10 flows. Connection portion 53. The connection part 53 and the main body pipe line 52 are connected so that the inflow pipe line 53a and the main body pipe line 52 communicate with each other. Moreover, the connection part 53 and the 2nd pipe line 55 are connected by the volt | bolt and the nut, for example. In addition, the outer peripheral surface 52a of the main body pipe line 52 in the first pipe line 51 is formed with unevenness including a concave part 52b and a convex part 52c. As shown in FIG. 8, the inflow conduit 53 a in the connection portion 53 has an axis A <b> 2 that is offset from a virtual line V <b> 1 that extends in a direction orthogonal to the axis A <b> 1 of the main body conduit 52.

  As shown in FIGS. 6 and 7, the first pipe 51 is inserted into the second pipe 55. A water supply channel C <b> 2 is formed by a space between the inner peripheral surface 55 a of the second conduit 55 and the outer peripheral surface 52 a of the main body conduit 52. The second pipe 55 has an inflow portion 56 a and an outflow portion 56 b of water supply used for rinsing the tableware 3. The inflow part 56a and the outflow part 56b are connected via the water supply flow path C2. As shown in FIG. 3, the inflow part 56a is connected to a supply source of water supply such as water supply via a pipe line 57A, and the outflow part 56b is connected to the rinsing tank 91 via a flow path 57B.

  As shown in FIGS. 7 and 8, the inflow portion 56 a and the outflow portion 56 b are not arranged to face both ends of the diameter of the second pipe 55. Specifically, when one of the inflow portion 56a and the outflow portion 56b is disposed at one end portion of the diameter, the other of the inflow portion 56a and the outflow portion 56b is circumferential from the other end portion of the diameter. Are shifted to the right or left side. For this reason, the water that has flowed in from the inflow part 56a is directed to the outflow part 56b in the clockwise direction, and the relatively long flow path is directed to the outflow part 56b in the counterclockwise direction (black arrow). Is formed.

  The drainage heat recovery device 50 is a partition disposed between the inflow portion 56a and the outflow portion 57b in the circumferential direction of the second conduit 55 when viewed from the direction of the axis A1 of the main conduit 52 in the first conduit 51. A portion 59 is provided. The partition portion 59 of the present embodiment has a shorter distance between the inflow portion 56a and the outflow portion 56b (that is, relative relative) between the inflow portion 56a and the outflow portion 56b along the circumferential direction of the second pipe 55. In the short flow path) and not in the longer distance between the inflow portion 56a and the outflow portion 56b (that is, on the relatively long flow path). The partition 59 contacts the inner peripheral surface 55a of the second pipe 55 and the convex part 52c of the outer peripheral surface 52a formed in the main pipe 52 so as to cause the flow in the circumferential direction of the water supply channel C2. Partitioning.

  In addition, the partition part 39 provided in the 2nd pipe line 55 may be integrally formed in at least one of the 1st pipe line 51 and the 2nd pipe line 55, and the partition part 59 which is another components is a water supply. You may arrange | position so that the flow path C2 may be partitioned off.

  The waste heat recovery device 50 is disposed between the electrical equipment box 40 in which the second cleaning pump P2 and the motor (electric part) M are accommodated in the left-right direction, and adjacent to the second cleaning pump P2 and the electrical equipment box 40, respectively. Has been. Furthermore, the waste heat recovery device 50 is disposed between the cleaning tank 10 and the removable exterior panel 7d in the front-rear direction and adjacent to each of the cleaning tank 10 and the exterior panel 7d. Further, the waste heat recovery apparatus 50 is disposed so that the inflow portion 56a and the outflow portion 56b face the exterior panel 7d.

  Next, operation | movement of the conveyor type dishwasher 1 in this embodiment is demonstrated. The operator pushes the rack 4 in which the tableware 3 before washing is set into the washing room R1 of the conveyor type dishwasher 1 from the entrance C. When the rack 4 pushes down a rack detection switch (not shown) on the cleaning side, the first cleaning pump P1 communicating with the upper cleaning nozzle 14 is activated, and subsequently the second cleaning pump P2 communicating with the lower cleaning nozzle 15 is operated. Operates.

  Subsequently, the motor M for driving the conveyor device 20 is activated, and the feed claw 24 pushes the rack 4 so that the rack 4 is conveyed toward the outlet side along the rack sliding surface of the rack rail 2. . The tableware 3 on the rack 4 is continuously cleaned by the upper cleaning nozzle 14 and the lower cleaning nozzle 15. Thereafter, when the rack 4 pushes down the rack detection switch on the rinsing side, the rinsing pump P3 is activated. While the rack 4 is being conveyed by the conveyor device 20, the tableware 3 is rinsed by the upper rinsing nozzle 81 and the lower rinsing nozzle 82, and the rack 4 is carried out from the outlet D of the conveyor type dishwasher 1. The motor M of the conveyor device 20 stops when all of the first cleaning pump P1, the second cleaning pump P2, and the rinsing pump P3 are stopped.

  When the first cleaning pump P1 and the second cleaning pump P2 are started, the cleaning water stored in the cleaning tank 10 is pumped to the upper cleaning nozzle 14 and the lower cleaning nozzle 15 through the water supply pipes 16, 17 and the like. The upper cleaning nozzle 14 and the lower cleaning nozzle 15 are sprayed toward the tableware 3 in the cleaning chamber R1.

  The washing water sprayed into the washing chamber R1 is collected in the washing tank 10 while the remaining vegetables washed away from the tableware 3 are removed by the filter 10g. The washing water from which fine leftovers have been removed by the filter 10g is circulated and supplied again into the washing chamber R1 by the first washing pump P1 and the second washing pump P2.

  Next, when the rinsing pump P3 is started, the rinsing water stored in the rinsing tank 91 is pumped to the upper rinsing nozzle 81 and the lower rinsing nozzle 82 via the water supply pipe 83, so that the upper rinsing nozzle 81 and the lower rinsing nozzle 81 are It sprays toward the tableware 3 from each of the side rinse nozzles 82.

  The rinsing water sprayed on the tableware 3 is collected in the washing tank 10 through the filter 10g, mixed with the washing water, and used as washing water. When rinsing water is sprayed into the cleaning chamber R1 and collected in the cleaning tank 10, excess cleaning water exceeding a certain water level is drained from the outlet 10c and discharged to the outside through the waste heat recovery device 50. .

  When the drainage discharged from the outlet 10c flows through the inner space (drainage channel C1) of the main body pipeline 52 in the first pipeline 51 of the drainage heat recovery device 50, the inner peripheral surface 55a of the second pipeline 55. When a cold water supply flows in a space (water supply flow path C2) between the main body pipe line 52 and the outer peripheral surface 52a, the heat exchange is performed between the waste water and the water supply. Thereby, the water supply which flowed in from the inflow part 56a flows out from the outflow part 56b in the state whose water temperature became higher than the time of inflow. The water supplied from the outflow part 56 b is supplied to the rinsing tank 91 of the booster device 90.

  For example, by providing a solenoid valve (not shown) on the pipeline 57A, the space between the inner circumferential surface 55a of the second pipeline 55 and the outer circumferential surface 52a of the main body pipeline 52 depending on the open / close state of the solenoid valve. Water supply can also be retained in (water supply flow path C2). In this case, between the water supply and drainage which remain in the space (water supply flow path C2) between the inner peripheral surface 55a of the second pipe line 55 and the outer peripheral surface 52a of the main body pipe line 52 efficiently. Heat exchange can be performed.

  For example, if the drainage heat recovery device 50 is clogged for some reason, excess cleaning water in the cleaning tank 10 flows into the pipe from the inlet hole at the upper end of the overflow pipe 71 and is discharged to the outside. Further, when the user grasps and lifts the handle 71 a provided at the upper end of the overflow pipe 71, the drain port 10 e into which the overflow pipe 71 has been inserted is exposed to the bottom surface 10 d of the cleaning tank 10, and the inside of the cleaning tank 10 The washing water is completely drained.

  Next, the effect of the conveyor type dishwasher 1 of the said embodiment is demonstrated. In the conveyor type dishwasher 1, the entire waste heat recovery device 50 is housed in the machine room R2 together with the first washing pump P1, the second washing pump P2 and the electrical box 40 which are heat sources. All or part of the heat recovery apparatus is disposed at a higher atmospheric temperature than when the heat recovery apparatus is disposed outside the machine room R2. Thereby, efficient heat exchange becomes possible. Furthermore, since the waste heat recovery device 50 is disposed on the side of the cleaning tank 10 in which relatively high temperature cleaning water is stored, it is disposed in the high ambient temperature region of the machine room R2. These synergistic effects enable efficient heat exchange.

  In the above embodiment, since the water discharged to the drainage channel C1 is excess water that is naturally discharged from the cleaning tank 10, the water stored in the cleaning tank 10 without providing a drain pump or a valve or the like. Can be discharged with a simple configuration.

  In the above embodiment, as shown in FIG. 8, the inflow conduit 53 a in the waste heat recovery apparatus 50 is offset from the virtual line V <b> 1 orthogonal to the axis A <b> 1 of the main body conduit 52 (a predetermined distance away from the virtual line V <b> 1). And an axis A2) substantially parallel to the virtual line V1. Here, in the case of the drainage heat recovery apparatus in which the inflow pipe line in the drainage heat recovery apparatus matches the virtual line orthogonal to the axis of the main body pipe line, that is, the axis of the main body pipe line is not offset with respect to the axis of the inflow pipe line, It flows linearly from the inflow pipe toward the inner peripheral surface of the main pipe, and flows down in the Z-shape through the main pipe. For this reason, how the water flowing into the waste heat recovery device hits the inner peripheral surface of the main body conduit is biased partially. In this respect, in this embodiment, the cleaning water flowing from the cleaning tank 10 into the waste heat recovery device 50 draws a circular orbit along the inner peripheral surface 53b of the connection portion from the inflow conduit 53a in the connection portion 53 (vortex). And flow down spirally along the inner peripheral surface 52d of the main body conduit 52 communicating with the connecting portion 53, so that the water flowing into the waste water heat recovery device 50 flows into the inner peripheral surface 52d of the main body conduit 52. There is no bias in the way of winning. Therefore, the waste heat recovery apparatus 50 of this embodiment is excellent in heat exchange efficiency.

  In the present embodiment, the waste heat recovery device 50 is disposed adjacently between the second cleaning pump P2 and the electrical box 40 in the left-right direction, and is disposed between the cleaning tank 10 and the exterior panel 7d in the front-rear direction. Adjacent to each other. Thereby, since the waste heat recovery device 50 is disposed adjacent to the second cleaning pump P2, the electrical equipment box 40, and the cleaning tank 10 serving as a heat source, more efficient heat exchange is possible. Further, by removing the exterior panel 7d, the maintenance of the waste heat recovery device 50 becomes possible, so that the maintainability can be improved. Furthermore, in the above embodiment, since the inflow portion 56a and the outflow portion 56b of the waste heat recovery apparatus 50 are arranged so as to face the exterior panel 7d, maintenance related to the inflow portion 56a and the outflow portion 56b is easily performed. can do.

  The waste heat recovery apparatus 50 according to the present embodiment includes a first pipeline 51 that forms the drain passage C1 and a second pipeline 55 that forms the water supply passage C2 so as to surround the first pipeline 51. Since the heavy pipe structure is adopted, a structure that increases the cross-sectional area of the water supply channel C2 can be easily formed in order to suppress pressure loss.

  As shown in FIG. 8, the waste heat recovery apparatus 50 according to the present embodiment includes an inner peripheral surface 55 a of the second pipe 55 and a convex portion 52 c of the outer peripheral face 52 a formed in the first pipe 51. A plate-like partitioning portion 59 that partitions the flow in the circumferential direction of the water supply channel C2 is formed. The partition part 59 is disposed only on a relatively short flow path between the inflow part 56a and the outflow part 56b along the circumferential direction of the second pipe 55, and is disposed on a relatively long flow path. Absent. For this reason, the water flowing into the inflow portion 56a of the second pipe 55 is prevented from being discharged from the outflow portion 56b via the clockwise flow path, and the counterclockwise flow path (black in FIG. 8). It is discharged from the outflow portion 56b via an arrow). That is, the water that has flowed into the inflow portion 56a of the second pipe 55 is not discharged from the outflow portion 56b at the shortest distance. Thereby, the time when the water that has flowed into the inflow portion 56a of the second pipe 55 comes into contact with the outer peripheral surface 52a of the main pipe 52 is ensured, and more efficient heat exchange is possible.

  In this embodiment, since the overflow pipe 71 which is a pipe line different from the waste heat recovery apparatus 50 is further provided, for example, even if the drain flow path C1 of the waste heat recovery apparatus 50 is clogged, the overflow pipe 71 From 71, excess cleaning water stored in the cleaning tank 10 can be discharged. Thereby, it is possible to prevent the wash water that has lost its place from overflowing from the upper surface of the wash tank 10. Moreover, it is possible to avoid adversely affecting the surroundings of the conveyor type dishwasher 1 due to the overflow of the wash water that is strongly alkaline from the wash tank 10.

  Since this embodiment is a conveyor type dishwasher 1 on the premise of continuous operation, the first and second washing pumps P1, P2 and rinsing pump P3 installed in the machine room R2 Parts are also operating continuously. For this reason, the temperature in machine room R2 also becomes comparatively high, and the effect by installing drainage heat recovery device 50 in machine room R2 becomes high.

  Although one embodiment has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention.

  In the above embodiment, the cleaning water is discharged in the horizontal direction from the outlet 10c on the side of the cleaning tank 10 and the cleaning water flows into the waste heat recovery device 50 as an example. It is not limited to this. For example, the upper portion of the cleaning tank 10 may protrude in the horizontal direction, the cleaning water may be discharged from the bottom of the protruding portion to the lower side in the vertical direction, and the cleaning water may flow into the waste heat recovery device 50. Even in this case, the waste heat recovery device 50 is disposed on the side of the cleaning tank 10 so that the drain flow path C1 is along the vertical direction, and the entire waste heat recovery device 50 is accommodated in the machine room R2. be able to.

  In the embodiment or the modification, the waste heat recovery apparatus 50 includes the first pipeline 51 that forms the drain passage C1 and the second pipeline 55 that forms the water supply channel C2 so as to surround the first pipeline 51. However, the present invention is not limited to this example. For example, the drainage heat recovery apparatus may be configured such that the spiral pipe forming the spiral water supply channel C2 is arranged on the inner peripheral surface of the first pipeline 51 forming the drain channel C1.

  In the above-described embodiment or modification, the rinsing tank 91 in which the rinsing water is stored has been described as an example provided in the booster device 90 separate from the conveyor-type dishwasher 1, but the conveyor-type dishwashing is described. It may be arranged in the machine room R2 of the machine 1. In this case, since the rinsing tank 91 as a heat source is disposed in the machine room R2, the waste heat recovery device 50 can be disposed in the machine room R2 having a higher ambient temperature.

  In the above-described embodiment or modification, the example in which the waste heat recovery device 50 is provided on the front side of the cleaning tank 10 has been described, but may be disposed on the rear side, the left side, or the right side. .

  In the said embodiment or modification, although the example in which the unevenness | corrugation was formed in the outer peripheral surface 52a of the main body pipe line 52 in the waste heat recovery apparatus 50 was demonstrated, you may make flat without forming an unevenness | corrugation. In addition, when the main body pipe line 52 having the irregularities formed on the outer peripheral surface 52a is used, the contact area between the drainage channel C1 and the water supply channel C2 increases, so that more efficient heat exchange becomes possible.

  In the said embodiment or modification, although the water used for both washing | cleaning and rinsing of the tableware 3 was demonstrated and mentioned as an example, the conveyor-type dishwasher 1 of the structure stored temporarily in the washing tank 10 was demonstrated. 3 may be applied to a conveyor type dishwasher having a washing tank 10 in which water used only for washing 3 is temporarily stored.

  In the above-described embodiment or modification, the example in which all of the waste heat recovery apparatus 50 is accommodated in the machine room R2 has been described. However, a part of the waste heat recovery apparatus is exposed outside the machine room R2. May be.

  In the said embodiment or modification, although the example which applied this invention to the conveyor type dishwasher 1 of the structure conveyed in the state accommodated in the rack 4 was given and demonstrated, for example, the tableware 3 is directly You may apply this invention to the dishwasher provided with the conveying apparatus (flight conveyor) which can convey the tableware 3 in the mounted state. Also, a washing machine that does not include the above-described transport device, that is, a so-called door-type dishwashing machine that opens and closes up and down, a dishwasher of a type in which a door is provided on the front side of the washing machine body like an oven For example, the present invention may be applied.

  The present invention may appropriately combine the contents described in the embodiment and other modifications.

  DESCRIPTION OF SYMBOLS 1 ... Conveyor type dishwasher (washing machine), 3 ... Tableware (object to be cleaned), 7 ... Housing, 7c ... Frame, 7d ... Exterior panel, 10 ... Washing tank, 20 ... Conveyor device, 40 ... Electrical box, DESCRIPTION OF SYMBOLS 50 ... Waste heat recovery apparatus, 51 ... 1st pipe line, 52 ... Main body pipe line, 52a ... Outer peripheral surface, 52b ... Recessed part, 52c ... Convex part, 52d ... Inner peripheral surface, 53 ... Connection part, 53a ... Inflow pipe line 55 ... second pipe, 56a ... inflow part, 56b ... outflow part, 59 ... partition part, 71 ... overflow pipe, 90 ... booster device, 91 ... rinsing tank, C1 ... drainage channel, C2 ... water supply channel, M: motor (electric part), P1: first cleaning pump (cleaning pump), P2: second cleaning pump (cleaning pump), P3: rinsing pump, R1: cleaning chamber, R2: machine chamber.

Claims (10)

A cleaning tank that temporarily stores at least water used for cleaning the object to be cleaned;
A water supply channel for supplying the water to a rinsing tank for storing water used for rinsing the cleaning object; and a drainage channel for discharging the water from the cleaning tank, and flows through the drainage channel. A waste heat recovery device for exchanging heat between the water and the water flowing through the water supply flow path;
A housing having a cleaning chamber for storing the object to be cleaned, and a machine room disposed below the cleaning chamber,
The waste heat recovery device is a washing machine, which is disposed on the side of the washing tank so that the drain passage is along the vertical direction.   The washing machine according to claim 1, wherein the entire waste heat recovery apparatus is accommodated in the machine room.   The washing machine according to claim 1 or 2, wherein the water discharged to the drainage channel is water that flows out from the washing tank when the storage amount of the washing tank exceeds a predetermined specified value. The drainage channel has a main body pipe extending along the vertical direction, and an inflow pipe connected to the main body pipe from a direction orthogonal to the vertical direction and into which the water flows from the cleaning tank. And
The washing machine according to any one of claims 1 to 3, wherein the inflow conduit has an axis that is offset from a virtual line orthogonal to the axis of the main body conduit.   The said waste heat recovery apparatus is a washing machine as described in any one of Claims 1-4 arrange | positioned adjacent to at least one of the washing | cleaning pump and the electrical equipment box in which an electrical component is accommodated. The machine room is formed by a frame and an exterior panel that can be attached to and detached from the frame.
The said waste heat recovery apparatus is a washing machine as described in any one of Claims 1-5 arrange | positioned adjacent to each other between the washing | cleaning pump and the said exterior panel.   The drainage heat recovery device is a double pipe including a first pipeline that forms the drainage channel and a second pipeline that forms the water supply channel so as to surround the first pipeline. Item 7. The washer according to any one of Items 1 to 6. The second pipe line has an inflow portion and an outflow portion of water used for rinsing the wash,
The waste heat recovery device is disposed between the inflow portion and the outflow portion in the circumferential direction of the second conduit when viewed from the axial direction of the first conduit, and the second conduit The washing machine according to claim 7, further comprising: a partition portion that partitions the water supply flow path by contacting the inner peripheral surface of the first pipe and the outer peripheral surface of the first pipeline.   The apparatus further comprises an overflow pipe provided in the cleaning tank and having an inflow hole at a position higher than a position where the drainage flow path is connected to the cleaning tank and lower than an upper surface of the cleaning tank. The washer according to any one of 1 to 8.   The washer according to any one of claims 1 to 9, wherein the washer is a conveyor type washer provided with a conveyor device for cleaning the object to be cleaned in the cleaning chamber.

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