JP6502688B2 - washing machine - Google Patents

Description

  BACKGROUND OF THE INVENTION Field of the Invention The present invention relates to a washing machine for washing objects to be washed such as dishes.

  There is known a washing machine provided with a heat exchange device for performing heat exchange between the water supplied to wash and rinse dishes in the washing room and the drainage drained from the washing room at that time. ing. Such a washing machine is disclosed in Patent Documents 1 and 2.

  According to Patent Document 1 (Utility Model Registration No. 3132813), the temperature is higher than that of water supply on the circumferential surface of the water supply pipe through which the water supply flows, and by sprinkling the drainage discharged from the cleaning chamber There is disclosed a cleaning machine provided with a heat exchange device that performs heat exchange. According to Patent Document 2 (Japanese Utility Model Application Laid-Open No. 6-13756), a water supply pipe whose temperature is lower than that of the waste water is disposed in a container capable of storing the waste water discharged from the washing tank. There is disclosed a washing machine provided with a heat exchange device that exchanges heat with water supply.

Utility model registration No. 3132813 Japanese Utility Model Application Publication No. 6-13756

  In a washing machine provided with such a heat exchange device, it is required that heat exchange can be performed efficiently. In patent document 1, an efficient heat exchange is implement | achieved by providing a pressure-reduction valve in a feed pipe, slowing the flow of water supply, and lengthening the time which can be heat-exchanged. Moreover, in patent document 2, an on-off valve is provided in the drainage pipe through which drainage flows, and efficient heat exchange is realized by temporarily storing drainage in the drainage pipe and prolonging the time during which heat exchange is possible. . However, providing such a pressure reducing valve or an on-off valve is structurally complicated.

  Therefore, an object of the present invention is to provide a cleaning machine that can perform efficient heat exchange with a simple configuration.

  The washing machine of the present invention is a washing machine having a rinsing step of spraying the water in the hot water storage tank to the object to be washed stored in the washing chamber to rinse, and the waste water discharged from the washing chamber in the rinsing step flows in Drain heat that performs heat exchange between the drainage flowing into the main body and the water flowing through the water supply pipe, and the water supply pipe disposed in the main body and through which the water supply supplied to the hot water storage tank flows A recovery device is provided, and an inlet portion through which drainage flows into the main body portion and an outlet portion through which drainage flows out from the main body portion are formed such that the inflow of drainage per unit time in the main body portion is larger than the maximum outflow amount. Due to the difference between the inflow and the maximum outflow, the water supply pipe is disposed at a position where it can contact the drainage stored in the main body in the rinsing step.

  In the washing machine having such a configuration, the amount of drained water flowing out is smaller than the amount of drained water flowing into the main body portion, so drainage is temporarily stored in the main body portion. And in a washing machine, since a feed pipe is arranged in a position which can be contacted to drainage stored in this way, time which a feed pipe and drainage contact will become long. As a result, the heat energy transmitted from the drainage to the feed water flowing in the feed pipe increases. As a result, efficient heat exchange can be performed with a simple configuration without providing a complicated configuration such as a pressure reducing valve or an on-off valve.

  In the washing machine according to the present invention, the main body portion is a cylindrical member having an inner space, and the water supply pipe is disposed in the inner space, and spirals in a state facing the inner circumferential surface of the cylindrical member. It may be arranged in a shape.

  In the washer of such a configuration, the drainage stored in the main body can be contacted with the longer water supply pipe. Thereby, the water supply in a water supply pipe can obtain heat energy efficiently from the drainage stored in the main-body part. In other words, the space for obtaining the predetermined heat exchange performance can be reduced.

  In the washing machine according to the present invention, the water supply pipe is capable of contacting 1/3 or more of the entire length with the drainage stored in the main body due to the difference between the inflow and the maximum outflow in the rinsing step. It may be arranged in

  In the washing machine of the present invention, an adapter may be attached which makes the inner diameter of the outlet in the main body smaller than the inner diameter of the inlet in the main body.

  In such a washing machine, the inner diameter of the outlet can be easily made smaller than the inner diameter of the inlet, so the maximum discharge amount of drainage in the main body can be reduced. That is, by replacing the adapter, it is possible to adjust the amount of storage in the main body in the rinsing step, so that it is possible to perform adjustment for more efficient heat exchange.

  According to the present invention, efficient heat exchange is possible with a simple configuration.

It is a perspective view of the dishwasher which concerns on one Embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows schematic structure of the dishwasher which concerns on one Embodiment. It is sectional drawing which shows the drainage heat recovery apparatus of FIG. It is a perspective view of the 1st member shown in FIG. It is a perspective view of the 2nd member shown in FIG. It is a sectional view showing a drainage heat recovery device of a dishwasher concerning a modification.

  Hereinafter, a dishwasher 1 according to an embodiment will be described with reference to the drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description. The dimensional proportions in the drawings do not necessarily coincide with those in the description.

  As shown in FIGS. 1 and 2, the dishwasher 1 has a washer body 2 covered with a stainless steel panel. The washing machine main body 2 is divided into an upper portion 2A in which the washing chamber 3 is formed and a lower portion 2B in which the machine chamber 4 is formed. At the corner portion on the back side of the washing machine main body 2, a pillar 6 extending in the vertical direction is disposed across the upper portion 2A and the lower portion 2B, and the back panel 5 is disposed between the pillars 6 and 6 .

  Further, a box-shaped door 7 for opening and closing the cleaning chamber 3 is provided in the upper portion 2A of the cleaning machine main body 2. The door 7 is vertically movably guided by a pair of stainless steel columns 6 and 6 and vertically moved by a handle 8A extending horizontally in the front. The distal ends of a pair of left and right pivoting arms 8B and 8B are fixed to both ends of the handle 8A, and the pivoting arms 8B and 8B are disposed obliquely along the side surface 7A of the door 7. One end of a link portion 8C disposed along the side surface 7A of the door 7 is rotatably connected to each of the pivoting arms 8B and 8B, and the other end of the link portion 8C is connected to the door 7 via a shaft pin 8D. The door 7 is vertically movable with respect to the pivoting movement of the handle 8A. Legs 9 are attached to the four corners of the bottom of the washing machine body 2.

  A rack rail (not shown) is detachably disposed in the cleaning chamber 3, and a grid-like plate (dish to be cleaned) P such as a plate after eating and drinking or a teacup is arranged on the rack rail. The tableware rack 11 is placed. In the upper part of the washing chamber 3, an upper washing nozzle 12A consisting of three arms extending radially and an upper rinsing nozzle 13A consisting of two arms are rotatably disposed. Similarly, in the lower part of the washing chamber 3, a lower washing nozzle 12B consisting of three arms extending radially and a lower rinsing nozzle 13B consisting of two arms are rotatably disposed. Washing water (water supply) is sprayed from above and below by the upper and lower washing nozzles 12A and 12B, and rinse water (water supply) is sprayed from above and below by the rinse nozzles 13A and 13B.

  A first filter 14 is detachably disposed on the bottom surface 3A of the cleaning chamber 3. Under the first filter 14, that is, above the machine chamber 4, cleaning for storing cleaning water is performed. A tank 15 is formed. In the cleaning tank 15, a cleaning water heater 16 for heating the cleaning water to improve the cleaning ability and the sterilization ability, and a cleaning water temperature sensor 17 for detecting the temperature of the cleaning water are installed.

  On the bottom surface 15A of the cleaning tank 15, the second filter 18 in the form of a mesh finer than the first filter 14 is detachably disposed, and a part of the bottom surface 15A falls below the second filter 18 Thus, the drop-in portion 19 is formed. A drainage port 19B is formed on the bottom surface 19A of the falling portion 19, and the drainage heat recovery device 50 is connected.

  The washing tank 15 is provided with an overflow pipe 21 extending in the vertical direction. The upper end of the overflow pipe 21 is located at the upper edge of the washing tank 15, and the lower end is fitted in the drainage port 19B formed in the bottom surface 19A of the falling portion 19. Excess cleaning water flows into the pipe from the inflow hole formed at the upper end of the overflow pipe 21 and is discharged to the outside through the drainage heat recovery device 50.

  The overflow pipe 21 is removable from the washing tank 15. As the user pulls up the overflow pipe 21, the outlet 19B into which the overflow pipe 21 has been inserted is exposed from the bottom 19A of the falling portion 19, and the cleaning water in the cleaning tank 15 is completely drained from the outlet 19B. Ru.

  A cleaning pump 23 is connected to the depression 19 of the cleaning tank 15 via a cleaning water suction pipe 22. The discharge port of the cleaning pump 23 is connected to a cleaning water discharge pipe 24. The washing water discharge pipe 24 is branched into a first washing water discharge pipe 25 and a second washing water discharge pipe 26, and the first washing water discharge pipe 25 is connected to the upper washing nozzle 12A, and a second washing water discharge pipe The reference numeral 26 is connected to the lower cleaning nozzle 12B.

  In addition, in the machine room 4, a hot water storage tank 28 is disposed to which a water supply W2 serving as rinse water is supplied from the outside through the drainage heat recovery apparatus 50. In the hot water storage tank 28, a rinse water heater 29 for heating rinse water to improve the sterilization ability, a rinse water temperature sensor 31 for detecting the temperature of the rinse water, and a water level sensor 32 for detecting the water level Is arranged. A solenoid valve 27 provided between the drainage heat recovery apparatus 50 and the hot water storage tank 28 opens and closes the valve in conjunction with the detection of the water level in the water level sensor 32 to keep the water level in the hot water storage tank 28 constant. In addition, an overflow pipe (not shown) may be installed in the hot water storage tank 28 for discharging excess rinse water to the outside to maintain the water level at a constant level.

  A rinse pump 34 is connected to the hot water storage tank 28 via a rinse water suction pipe 33. A rinse water discharge pipe 36 is connected to the discharge port of the rinse pump 34. The rinse water discharge pipe 36 is branched into a first rinse water discharge pipe 37 and a second rinse water discharge pipe 38, and the first rinse water discharge pipe 37 is connected to the upper rinse nozzle 13A, and the second rinse water discharge pipe The numeral 38 is connected to the lower rinse nozzle 13B. The hot water storage tank 28 may be provided outside the machine room 4.

  In the machine room 4, a detergent tank 39 storing a detergent to be mixed in the wash water in the wash tank 15 is disposed. A detergent supply pump 42 is connected to the detergent tank 39 via a detergent suction pipe 41. One end of a detergent discharge pipe 43 is connected to the discharge port of the detergent supply pump 42. The other end 43A of the detergent discharge pipe 43 is located in the cleaning chamber 3 and opens downward.

  As shown in FIG. 3, in the machine room 4, the drainage W1 discharged from the washing tank 15 in the washing room 3 is disposed in the main body 51 and the main body 51, and supplied to the hot water storage tank 28. A drainage heat recovery device 50 is disposed, which has a water supply pipe 53 through which the water supply W2 flows, and performs heat exchange between the drainage W1 flowing into the main body 51 and the water supply W2 flowing through the water supply pipe 53.

  The above-described drainage heat recovery apparatus 50 mainly includes two members, a first member 60 (see FIG. 4) and a second member 80 (see FIG. 5), and the first member 60 and the second member 80 are attached to and detached from each other. It is configured to be possible. The 1st member 60 has the 1st member main-body part 61 and the water supply pipe 53, as FIG.3 and FIG.4 shows. The first member main body portion 61 is formed with a water supply inlet portion 71 serving as an inlet of the water supply W2 and a water supply outlet portion 73 serving as an outlet for the water supply W2, and allows the drainage W1 to flow into the body portion 51 , 30 mm) is a member in which the drainage inlet 55 is formed.

  One end of the water supply pipe 53 is connected to the water supply inlet 71, the other end is connected to the water supply outlet 73, and the water supply W2 flows. The water supply pipe 53 generally protrudes downward from the first member main body portion 61 along the direction of the pipe axis C, and has a spiral shape so as to surround a space C1 around the pipe axis centered on the pipe axis C. It is wound.

  The water supply pipe 53 is integrally formed with the first member main body 61 when the first member main body 61 is injection-molded. In other words, the water supply pipe 53 is an insert part at the time of injection molding in the first member main body 61. The water supply pipe 53 is, for example, a stainless steel pipe (SUS pipe). A pipe 59A (see FIG. 2) to which the water supply W2 is supplied from an external water supply is connected to the water supply inlet 71. A pipe 59B (see FIG. 2) for supplying the water supply W2 to the hot water storage tank 28 is connected to the water supply outlet 73.

  On the upstream side of the first member main body portion 61, a connection portion 63 for connecting the main body portion 51 and the cleaning tank 15 is formed. Further, at the upper end of the connection portion 63, a mounting portion 65 for fixing the drainage heat recovery device 50 is formed in the falling portion 19 of the cleaning tank 15 (see FIG. 2). The screw 20A inserted from the side of the cleaning chamber 3 into the insertion hole 19C provided in the recessed portion 19 of the cleaning tank 15 is fastened to the screw hole 65A of the mounting portion 65 in the first member main body 61. A member 60, i.e. the drainage heat recovery device 50, is fixed to the sinking portion 19 of the washing tank 15.

  At the lower end of the first member main body portion 61, a mounting portion 69 for fixing the first member 60 to the second member 80 is formed. The screw 69B inserted from the first member 60 side into the insertion hole 69A provided in the mounting portion 69 is fastened to the screw hole 83A of the mounting portion 83 in the second member 80, whereby the first member 60 and the second member The members 80 are fixed to one another.

  As shown in FIGS. 3 and 5, the second member 80 interposes the water supply pipe 53 projecting downward from the first member main body 61 in the direction of the pipe axis C, and the main body 51 into which the drainage W1 flows It is a member to form. The second member 80 has a second member main body 81 facing the water supply pipe 53 whose inner peripheral surface is disposed in a spiral, and an inner diameter D2 (for example, 15 mm) which causes the drainage W1 to flow out from the main body 51 to the lower end And a tapered portion 87 in which the drainage outlet portion 57 is formed. The inner diameter D2 of the drainage outlet portion 57 is 1/2 of the inner diameter D1 of the drainage inlet portion 55.

  A mounting portion 83 for fixing the second member 80 to the first member 60 is formed at the upper end of the second member main body portion 81. The screw 69B inserted from the first member 60 side into the insertion hole 69A of the mounting portion 69 of the first member 60 is fastened to the screw hole 83A provided in the mounting portion 83 of the second member 80, thereby the first The member 60 and the second member 80 are fixed.

  In the drainage heat recovery apparatus 50 configured as described above, the drainage inlet 55 where the drainage W1 flows into the main body 51 and the drainage outlet 57 where the drainage W1 flows out from the main body 51 The inflow is formed to be larger than the maximum outflow. The maximum outflow amount in the main body 51 is proportional to the inner diameter D2 of the drainage outlet 57.

  In the drainage heat recovery apparatus 50, the inflow of the drainage W1 per unit time in the main unit 51 is formed to be larger than the maximum outflow, the drainage W1 is contained in the main unit 51 in one rinse process. It will be stored. For example, the drainage W1 is stored in the main body 51 up to the position of the height WL.

  The water supply pipe 53 is disposed at a position where it can contact the drainage W1 stored in the main body 51 in the rinsing step. That is, a part of the water supply pipe 53 extends to a position lower than the height WL at which the drainage W1 is stored in the main body 51 in one rinse process. For example, as shown in FIG. 3, 1/3 or more of the total length of the water supply pipe 53 comes into contact with the drainage W1 stored in the main body 51 in the rinsing step.

  Next, the operation of the dishwasher 1 will be described. As shown in FIG. 2, when the power switch is turned on, the dishwasher 1 sprays the hot water in the hot water storage tank 28 into the washing chamber 3 by the rinse pump 34 to supply the hot water into the washing tank 15. Be done. The temperature of the hot water in the hot water storage tank 28 is set to about 80 ° C. Thus, initial hot water supply is performed. Then, the amount of detergent suitable for the initial hot-water supply amount is supplied into the cleaning tank 15, and the detergent concentration of the cleaning water in the cleaning tank 15 becomes a predetermined concentration.

  After the initial hot water supply, when the user racks the tableware P and closes the door 7, the door switch (not shown) detects that the door is closed and the operation start signal is a microcomputer (not shown). Input to When the operation start signal is input to the microcomputer, the cleaning of the dishes is started. The washing of the dishes is performed by spraying the washing water in the washing tank 15 toward the dishes P in the washing chamber 3. The temperature of the wash water in the wash tank 15 is set to be 60 ° C to 70 ° C.

  When the washing pump 23 is started, the washing water stored in the washing tank 15 is pressure-fed to the upper and lower washing nozzles 12A and 12B through the washing water discharge pipe 24 and the like, and the washing nozzles 12A and 12B are cleaned. The jet is directed toward the tableware P in the washing chamber 3. At this time, since the cleaning nozzles 12A and 12B continue to rotate by the reaction force of the jet force, the cleaning water is uniformly applied to the tableware P, and the stains of the tableware P are efficiently washed away.

  The washing water sprayed into the washing chamber 3 is collected in the washing tank 15 while the remaining vegetables and the like washed from the dishes P are removed by the first filter 14. Furthermore, after fine residual vegetables are removed by the second filter 18, it is circulated and supplied again into the washing chamber 3 by the washing pump 23.

  Next, when the rinse pump 34 is started, the rinse water stored in the hot water storage tank 28 is pressure-fed to the upper and lower rinse nozzles 13A and 13B through the rinse water discharge pipe 36 etc. 13A and 13B are jetted toward the tableware P. The temperature of the rinse water pressure-fed from the hot water storage tank 28 is set to about 80.degree. At this time, since the rinse nozzles 13A and 13B also continue to rotate by the reaction force of the injection force, the rinse water is uniformly applied to the tableware P, and the rinse of the tableware P is efficiently performed.

  The rinse water jetted to the tableware P is collected in the washing tank 15 through the first filter 14 and mixed with the washing water, and is used as washing water in the next washing step. When rinse water is jetted into the washing chamber 3 and collected in the washing tank 15, excess wash water exceeding a certain water level is drained from the overflow pipe 21 and drained to the outside through the drainage heat recovery device 50. Ru. The temperature of the drainage W1 discharged from the overflow pipe 21 is around 60 ° C. In addition, 2 liters of waste water W1 is discharged per one rinse process.

  The drainage W1 discharged from the overflow pipe 21 flows in a space C1 around a pipe axis formed inside the water supply pipe 53 disposed in a spiral shape in the drainage heat recovery apparatus 50. At this time, heat exchange is performed between the drainage W1 and the cold water supply W2 compared to the drainage W1 flowing through the water supply pipe 53.

  Further, in the drainage heat recovery apparatus 50 of the present embodiment, since the inflow of drainage W1 per unit time in the main body 51 is larger than the maximum outflow, the drainage W1 is stored in the main body 51 in one rinse process. Will be The water supply pipe 53 is disposed at a position where the water supply pipe 53 can contact the drainage W1 stored in the main body 51 in the rinsing step, so the water supply pipe 53 is connected to the drainage W1 stored in the main body 51 as shown in FIG. Contact. Therefore, heat exchange is performed between the drainage W1 stored in the main body 51 and the water supply W2 flowing to the water supply pipe 53 in contact with the drainage W1.

  The temperature of the water supply W2 supplied from the external water source is 10 ° C to 25 ° C. That is, heat exchange is performed between the drainage W1 at around 60 ° C. and the water supply W2 at 10 ° C. to 25 ° C. Thus, the water supply W2 flowing in from one end of the water supply pipe 53 flows out from the other end in a state where the water temperature is higher than that at the time of the inflow.

  In the pipe 59B connected to the water supply outlet 73, the water supply W2 may stay in the water supply pipe 53 depending on the open / close state of the solenoid valve 27 provided between the dishwasher 1 and the hot water storage tank 28. . In this case, heat exchange is performed between the water supply W2 staying in the water supply pipe 53 and the drainage W1.

  The drainage inlet portion 55 and the drainage outlet portion 57 of the drainage heat recovery apparatus 50 so that the drainage W1 stored in the main body unit 51 is not stored beyond the capacity of the main body unit 51 in one rinse process. Is formed. That is, the sizes of the drainage inlet 55 and the drainage outlet 57 of the drainage heat recovery apparatus 50 are formed in consideration of the discharge amount and / or the discharge timing in the rinsing step. Therefore, the problem that the drainage W1 is not drained from the cleaning tank 15 in the cleaning chamber 3 does not occur.

  Next, the operation and effect of the dishwasher 1 of the above embodiment will be described. In the dishwasher 1 of the above embodiment, since the amount of drained water W1 flowing out is smaller than the amount of drained water W1 flowing into the main body portion 51, the drained water W1 is temporarily stored in the main body portion 51. Ru. And in the dishwasher 1, since the water supply pipe 53 is arrange | positioned in the position which can contact the drainage W1 stored in this way, the time which the water supply pipe 53 and the drainage W1 contact will become long. As a result, the heat energy transmitted from the drainage W1 to the water supply W2 flowing in the water supply pipe 53 is increased. As a result, efficient heat exchange can be performed with a simple configuration without providing a complicated configuration such as a pressure reducing valve or an on-off valve.

  In the dishwasher 1 of the above-described embodiment, the main body 51 is a cylindrical member having an inner space 51A, and the water supply pipe 53 is disposed in the inner space 51A, and the inner periphery of the cylindrical member Since it arrange | positions helically in the state which opposed the surface, the water supply pipe 53 of longer can be made to contact the drainage W1 stored in the main-body part 51. As shown in FIG. Thus, the water supply W2 in the water supply pipe 53 can efficiently obtain thermal energy from the drainage W1 stored in the main body 51. In other words, the space for obtaining the predetermined heat exchange performance can be reduced. Thus, since the size of the drainage heat recovery apparatus 50 can be made compact, it can be disposed inside the machine room 4 or the like without being disposed outside the dish washer 1. In addition, even when the drainage heat recovery device 50 is disposed inside the machine room 4 or the like, it is possible to suppress an increase in the outer dimensions of the dishwasher 1.

  In the dishwasher 1 of the above embodiment, the drainage W1 discharged from the washing chamber 3 is caused to flow into the main body 51 which reduces the loss of thermal energy, and is discharged from the washing chamber 3 in the inner empty portion 51A. Since heat exchange is performed between the drainage W1 and the water supply W2 from the water supply source, effective heat exchange is performed.

  In the dish washer 1 of the above-described embodiment, efficient heat exchange can be performed without stopping the discharge of the drainage W1 from the washing tank 15. Therefore, there is no reduction in the throughput per hour, which is an indicator of dish washer performance. In other words, in the dish washer 1 of the above embodiment, efficient heat exchange becomes possible without extending the operation cycle time.

  As mentioned above, although one Embodiment was described, this invention is not limited to the said embodiment, A various deformation | transformation is possible in the range which does not deviate from the meaning of invention.

<Modification 1>
In the above embodiment, by forming the tapered portion 87 in the second member 80, the inner diameter D2 of the drainage outlet portion 57 is made narrower than the inner diameter D1 of the drainage inlet portion 55, and drainage per unit time in the main body portion 51 can be performed. Although the example in which the inflow is made to be larger than the maximum outflow has been described, the present invention is not limited thereto. For example, as shown in FIG. 6, by attaching the adapter 110 to the lower end of the second member 80, the inner diameter D2 of the drainage outlet portion 157 is made smaller than the inner diameter D1 of the drainage inlet portion 55. The inflow of the drainage W1 per hour may be made larger than the maximum outflow.

  As shown in FIG. 6, the adapter 110 has a fitting portion 111 and a tapered portion 113. The fitting portion 111 is formed to be able to be fitted to the lower end of the second member 80. The inner diameter D1 at the lower end opening of the second member 80 is the same inner diameter D1 (e.g., 30 mm) as the drainage inlet 55. The tapered portion 113 narrows the inner diameter D1 to an inner diameter D2 (for example, 15 mm) smaller than the inner diameter D1. The second member 80 and the adapter 110 are fitted and coupled by a pipe taper screw. Thereby, the airtightness of the 2nd member 80 and adapter 110 is securable, without performing seal processing separately.

  In the dishwasher 101 in which such a drainage heat recovery apparatus 150 is provided, the inner diameter D1 of the outlet can be easily made smaller than the inner diameter D2 of the inlet, so the maximum discharge amount of the drainage W1 in the main body 151 is reduced. be able to. That is, by exchanging the adapter 110, it is possible to adjust the amount of storage in the main body 151 in the rinsing step, and therefore, it is possible to perform adjustment for more efficient heat exchange.

<Other Modifications>
In the drainage heat recovery apparatus 50 according to the above embodiment, as shown in FIG. 3, the drainage W1 stored by the difference between the inflow amount of drainage W1 per unit time and the maximum outflow amount in the main body 51 is the main body 51 In the example described above, the drainage W1 may be stored in the full inner space 51A of the main body 51. In the drainage heat recovery apparatus 50 according to the above-described embodiment, it is efficient to set the storage amount such that the water supply pipes 53 arranged in a spiral shape are just submerged.

  In the drainage heat recovery apparatus 50 according to the above-described embodiment, the water supply pipe 53 generally protrudes downward from the first member 60 along the direction of the pipe axis C, and around the pipe axis centered on the pipe axis C. For example, the present invention is described with reference to an example in which a spiral winding is performed so as to surround the space C1 of the present invention, but the present invention is not limited thereto. For example, the water supply pipe only needs to protrude downward from the first member along the direction of the pipe axis C (one direction) as a whole, and may not have a portion wound in a spiral shape. For example, the water supply pipe may be configured to extend from the water supply inlet to the lower end of the main body and to extend to the water outlet at the predetermined position again toward the upper end. In addition, the water supply pipe may be configured to have a serpentine portion that reciprocates repeatedly in a predetermined range in the direction of the pipe axis C.

  Moreover, the drainage heat recovery apparatus 50 of the said embodiment and a modification is applied not only to the tableware washing machine 1 of the type which a door opens and closes up and down as mentioned above, for example, the front surface of a washing machine main body like an oven. The present invention can also be applied to a dishwasher of a type provided with a door on the side, and a conveyor-type dishwasher for cleaning while transporting a rack for storing dishes.

  The present invention may be combined with the above-described embodiment and other modifications as appropriate.

  DESCRIPTION OF SYMBOLS 1 ... Dishwashing machine (washing machine), 3 ... Washing room, 4 ... Machine room, 15 ... Washing tank, 28 ... Hot water storage tank, 50 ... Waste water heat recovery device, 51 ... Main body part, 51A ... Internal space part, 53 ... Water supply pipe 55 drain outlet (inlet portion) 57 drain outlet portion (outlet portion) 60 first member 80 second member D2 inner diameter W1 drain W2 water supply.

Claims (4)

Together covered with panels, an upper portion cleaning chamber is formed in the vertical direction, comprising a washer body is partitioned into a lower portion of the machine room is formed, containing water of the hot water storage tank to the cleaning chamber A washing machine having a rinsing step of spraying and rinsing the washed object,
In the rinsing step, one main body portion into which drainage discharged from a cleaning tank disposed in the cleaning chamber flows, and a water supply pipe disposed in the main body portion and through which water supplied to the hot water storage tank flows A drainage heat recovery device for exchanging heat between the drainage flowing into the main body and the water supply flowing through the water supply pipe;
The inlet portion into which the drainage flows into the body portion and the outlet portion from which the drainage flows out from the body portion are formed such that the inflow of the drainage per unit time in the body portion is larger than the maximum outflow amount. Yes,
The water supply pipe is disposed at a position where it can contact the drainage stored in the main body in the rinsing step, because there is a difference between the inflow and the maximum outflow.
The drainage heat recovery apparatus is disposed inside the machine room . The main body portion is a cylindrical member having an inner hollow portion,
The washing machine according to claim 1, wherein the water supply pipe is disposed in the inner space portion and is disposed in a spiral shape in a state of facing the inner peripheral surface of the cylindrical member.   The water supply pipe is disposed at a position where one-third or more of the total length can be in contact with the drainage stored inside the main body due to a difference between the inflow and the maximum outflow. The washing machine according to claim 1 or 2, which is   The washing machine according to any one of claims 1 to 3, wherein an adapter is attached to make the inner diameter of the outlet in the main body smaller than the inner diameter of the inlet.

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