JP6667211B2 - washing machine - Google Patents

Description

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

  2. Description of the Related Art A washing machine for washing an object to be washed such as tableware stored in a washing room of a main body is known. In such a washing machine, steam is generated at the time of cleaning the object to be cleaned and at the time of rinsing the object to be cleaned. The cleaning machine disclosed in Patent Literature 1 includes a suction unit that suctions water vapor generated in a cleaning chamber, and a heat exchanger that dehumidifies and cools the suctioned water vapor.

JP-A-1-227732

  In the heat exchanger, condensation occurs due to condensation of water vapor. The water generated by the condensation is returned to the cleaning room. However, it is difficult to completely discharge water in the heat exchanger, and water may remain in the heat exchanger. The water remaining in the heat exchanger causes the growth of mold and bacteria, and has a problem of deteriorating hygiene.

  Then, an object of the present invention is to provide a washing machine excellent in hygiene.

  The washing machine of the present invention is a washing machine for washing an object to be washed contained in a washing room, and has an exhaust part for exhausting water vapor in the washing chamber, and a condensing part for condensing water vapor discharged from the exhaust part. The heat exchanger includes a heat exchanger and a heating unit that heats the inside of the heat exchanger.

  Since the washing machine having this configuration includes the heating unit that heats the inside of the heat exchanger, the water generated by the condensation of the steam by the condensation unit can be heated and dried. Thereby, in a washing machine, mold and bacteria can be prevented from growing in the heat exchanger. As a result, excellent hygiene can be obtained.

  The cleaning machine of the present invention may include a control unit that controls the operation of the heating unit, and the control unit may operate the heating unit when the step of exhausting the water vapor in the cleaning chamber ends.

  In the washing machine having such a configuration, since the inside of the heat exchanger is heated after the condensation of the steam by the condensation unit is performed, the water generated by the condensation of the steam can be effectively dried. Therefore, in a washing machine, mold and bacteria can be more effectively prevented from growing in the heat exchanger.

  The cleaning machine of the present invention includes a water supply storage unit that stores rinsing water used for rinsing the object to be cleaned, and a supply unit that circulates water supplied to the water supply storage unit. It may be a part.

  In the washing machine having such a configuration, heat exchange is performed between the steam and the feedwater flowing through the supply unit in the heat exchanger, so that the steam can be condensed. In addition, by performing heat exchange between the water supply and the steam passing through the supply section in the heat exchanger, the water passing through the supply section flows out at a higher temperature than at the time of inflow. In the water supply storage section, the water supply is heated. Therefore, by increasing the temperature of the feedwater supplied to the feedwater reservoir in advance, the heating efficiency in the feedwater reservoir can be increased.

  In the washing machine of the present invention, the heating section may be arranged below the heat exchanger.

  In the washing machine having such a configuration, since heat is effectively distributed in the heat exchanger, water in the heat exchanger can be effectively dried.

  In the washing machine of the present invention, the heating unit may be provided in the supply unit located in the heat exchanger.

  In the washing machine having such a configuration, water due to dew condensation generated on the outer surface of the supply unit can be effectively dried. Further, the temperature of the supply water flowing through the supply section can be effectively increased.

  The washing machine of the present invention may include a discharge unit that discharges air having a reduced content of water vapor discharged from the heat exchanger into the cleaning chamber.

  In the washing machine having such a configuration, the air in which the amount of water vapor contained is reduced is discharged into the washing room, so that the washing room and the dishes can be dried by the air. Therefore, it is possible to suppress the growth of mold and bacteria in the cleaning chamber.

  In the cleaning machine of the present invention, the exhaust unit may be provided with an exhaust fan that exhausts water vapor from the cleaning chamber.

  In the cleaning machine having such a configuration, steam can be more reliably discharged from the cleaning chamber.

  ADVANTAGE OF THE INVENTION According to this invention, the washing machine excellent in hygiene can be provided.

It is a perspective view of the dishwasher concerning one embodiment. It is a figure which shows the schematic structure of the dishwasher of FIG. It is the perspective view which showed the heat exchanger of FIG. It is the perspective view which showed the heat exchanger of FIG. It is a perspective view showing the composition of the 2nd exhaust pipe.

  Hereinafter, a dishwasher (washing machine) 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 ratios in the drawings do not always match. For convenience of description, the front-rear direction, the left-right direction, and the up-down direction are set in FIG.

  As shown in FIG. 1, a dishwasher 1 according to one embodiment is an undercounter type washer having a door 4 provided on a front surface of a washing room 2A. As shown in FIGS. 1 and 2, the dishwasher 1 includes a main body 2, an upper cleaning nozzle 5, an upper rinsing nozzle 6, a lower cleaning nozzle 7, a lower rinsing nozzle 8, and an exhaust unit. 61, a cleaning tank 9, a hot water storage tank (water supply storage section) 18, a detergent supply pump 32, a rinse agent supply pump 37, a heat exchanger 80, and a heater (heating section) 90.

  The main body 2 is formed of a stainless steel panel. The main body 2 includes a washing chamber 2A having an opening for inserting and removing a rack in which tableware (objects to be washed) D is opened and closed, a drainage pump 52, a hot water storage tank 18, a microcomputer (hereinafter, “microcomputer”). (Control unit) 55 and the like. Legs 3 are attached to the four corners of the bottom surface of the main body 2.

  The main body 2 is provided with a door 4 for taking tableware D in and out of the washing room 2A. A rack rail 2C is provided in the washing room 2A, and a tableware rack (not shown) on which tableware D is arranged is placed on the rack rail 2C. Above the door 4 on the front surface of the main body 2, an operation panel 2D for a user to input an operation mode and various settings is provided.

  The upper cleaning nozzle 5 and the upper rinsing nozzle 6 are provided above the cleaning chamber 2A. The upper cleaning nozzle 5 includes three radially extending arms and is rotatably disposed. The upper rinsing nozzle 6 includes two arms and is rotatably arranged. The lower cleaning nozzle 7 and the lower rinsing nozzle 8 are provided in a lower part of the cleaning chamber 2A. The lower cleaning nozzle 7 includes three radially extending arms and is rotatably disposed. The lower rinsing nozzle 8 includes two arms and is rotatably arranged.

  The washing water is sprayed from above and below by the upper washing nozzle 5 and the lower washing nozzle 7 in the washing process on the tableware D arranged in the dish rack, and the upper and lower rinsing nozzles 6 and 8 rinse the washing water from above and below in the rinsing process. Water is injected.

  An exhaust unit 61 is connected to the cleaning chamber 2A. The exhaust part 61 is connected, for example, above the side surface of the cleaning chamber 2A. In the cleaning chamber 2A, steam (including steam) is generated in a rinsing step and the like described below. The exhaust unit 61 is provided with an exhaust fan 60 that exhausts air containing the steam (hereinafter, also simply referred to as “steam”). The operation of the exhaust fan 60 is controlled by the microcomputer 55. The water vapor in the cleaning chamber 2A is pushed up inside the first exhaust pipe 63 via the exhaust part 61 by the exhaust fan 60, and is sent out to the heat exchanger 80 described later.

  The cleaning tank 9 is disposed below the cleaning chamber 2A and stores cleaning water. The washing tank 9 is provided with a water level detection switch 10 for detecting the level of the washing water. The water level detection switch 10 is a switch that is turned on when the water level in the cleaning tank 9 exceeds a predetermined water level H and turned off when the water level is equal to or lower than the predetermined water level H.

  A cleaning pump 14 is connected to a side surface of the cleaning tank 9 via a cleaning water suction pipe 13. A pump filter 12 is provided in a portion of the cleaning tank 9 to which the cleaning water suction pipe 13 is attached. A cleaning water discharge pipe 15 is connected to a discharge port of the cleaning pump 14. The cleaning water discharge pipe 15 branches into a first cleaning water discharge pipe 16 and a second cleaning water discharge pipe 17. The first cleaning water discharge pipe 16 is connected to the upper cleaning nozzle 5. The second cleaning water discharge pipe 17 is connected to the lower cleaning nozzle 7.

  A drain pipe 50 is connected to the bottom 9A of the cleaning tank 9 via a drain suction pipe 9B. The drain pipe 50 is provided with a drain pump 52 for discharging drain water from the cleaning tank 9. The operation of the drain pump 52 is controlled by the microcomputer 55. The water stored in the washing tank 9 is discharged to the outside through a drain pipe 50 by a drain pump 52. When the drain pipe 50 discharges drain water below the drain suction pipe 9B, the drain pump 52 may not be provided.

  As shown in FIG. 1, the heat exchanger 80 is disposed at an upper portion of the main body 2 above the cleaning chamber 2A. As shown in FIG. 3, the heat exchanger 80 includes an exhaust passage 83, a water supply passage (condensing unit, supply unit) 85, a housing 81 that houses the exhaust passage 83 and the water supply passage 85, have. FIG. 3 shows a state in which the lid 81A (see FIG. 2) is removed for convenience of explanation. The heat exchanger 80 is a device that performs heat exchange between steam flowing through the exhaust passage 83 and water flowing through the water supply passage 85.

  The exhaust passage 83 is a passage through which steam exhausted from the cleaning chamber 2A flows. One end 83B of the exhaust passage 83 is connected to a first exhaust pipe 63, and the other end 83C of the exhaust passage 83 is connected to a second exhaust pipe (discharge unit) 65. Further, a flow path is formed in the exhaust flow path 83 from one end 83B of the exhaust flow path 83 to the other end 83C of the exhaust flow path 83 along the other end 85B of the water supply flow path 85 and one end 85A of the water supply flow path. A partition plate 83A is provided. That is, the steam flowing from one end 83B of the exhaust flow path 83 flows to the other end 83C of the exhaust flow path 83 along a pipe from the other end 85B of the water supply flow path 85 to one end 85A of the water supply flow path. The air containing water vapor flowing through the exhaust passage 83 becomes water with a part of the water vapor being condensed and becomes water with a reduced amount of water vapor.

  The second exhaust pipe 65 is a pipe member having a circular cross section orthogonal to the flow path direction, and air having a reduced amount of water vapor flows through the hollow portion. As shown in FIG. 5, the second exhaust pipe 65 is partially disposed inside the cleaning chamber 2A. Specifically, the second exhaust pipe 65 is arranged, for example, above the cleaning chamber 2A and extends along the left-right direction of the main body 2. The second exhaust pipe 65 in the cleaning chamber 2A is provided with a plurality of holes (not shown) at predetermined intervals in the extending direction. The hole is provided at a lower portion of the second exhaust pipe 65. As a result, the second exhaust pipe 65 discharges the air having a reduced content of water vapor downward into the cleaning chamber 2A. The air having a reduced content of water vapor discharged from the second exhaust pipe 65 can dry the washing room 2A and the tableware D.

  The water supply flow path 85 is a pipe member having a circular cross section orthogonal to the flow path direction, and rinsing water to be supplied to the hot water storage tank 18 flows through a hollow portion thereof. The water supply channel 85 constitutes a part of a supply unit that circulates the water supplied to the hot water storage tank 18. The water supply channel 85 has a function as a condensing unit that condenses the steam flowing through the exhaust channel 83. Examples of the water supply passage 85 include a flexible pipe made of copper and coated with corrosion resistance, a flexible pipe made of stainless steel, a fin tube having fins provided on the outer circumference of the pipe, and spirally wound around the outer circumference of the pipe. And a fin tube having a fin provided. One end 85A of the water supply flow passage 85 is connected to a water supply pipe (supply unit) 21C described later, and the other end 85B of the water supply flow passage 85 is connected to a water supply pipe (supply unit) 21D described later.

  The bottom 81B of the housing 81 of the heat exchanger 80 is provided with a hole 81C penetrating the bottom 81B in the thickness direction. The hole 81C is formed at one corner of the bottom 81B. The hole 81C communicates with the cleaning chamber 2A of the main body 2. Specifically, the hole 81 </ b> C communicates with a drain (not shown) provided at a corner in the upper part of the main body 2. The bottom portion 81B of the heat exchanger 80 is inclined at a downward slope in a direction indicated by an alternate long and short dash line arrow in FIG. 3 with a position where the hole 81C is provided as a lowermost position. Thereby, the water in the heat exchanger 80 flows toward the hole 81C, and is discharged into the cleaning chamber 2A via the hole 81C and the drainage portion.

  As shown in FIG. 4, the heat exchanger 80 is provided with a heater 90. FIG. 4 shows a state in which the water supply channel 85 and the partition plate 83A are removed for convenience of explanation. The heater 90 heats the inside of the heat exchanger 80. The heater 90 is, for example, a heating wire. The heater 90 is connected to a power supply 91. The operation of the heater 90 (supply of power from the power supply 91) is controlled by the microcomputer 55. The temperature of the heater 90 is set to a temperature at which the water in the heat exchanger 80 can be dried (evaporated). The heater 90 is disposed, for example, in a meandering manner on the bottom 81 </ b> B of the heat exchanger 80. The heater 90 is covered with an aluminum sheet 92. The aluminum sheet 92 covers substantially the entire bottom 81B.

  As shown in FIG. 2, the hot water storage tank 18 is a tank in which water for rinsing the tableware D is stored. Water is supplied to the hot water storage tank 18 from an external water heater (not shown) via a water supply pipe 21A. The strainer 19 is provided in the water supply pipe 21A. A branch 21B is provided downstream of the strainer 19 in the water supply pipe 21A. One of the branch portions 21B is connected to the hot water storage tank 18 via the water valve 20A. The water valve 20A is controlled by the microcomputer 55. The other end of the branch portion 21B is connected to one end 85A (see FIG. 3) of a water supply flow path 85 in the heat exchanger 80 described above via a water supply pipe 21C. The water flowing from the water supply pipe 21C passes through the water supply flow path 85 of the heat exchanger 80, and is supplied to the hot water storage tank 18 via the water supply pipe 21D.

  In the hot water storage tank 18, a rinsing water heater 22 for maintaining water for rinsing the tableware D at a predetermined temperature and a water temperature sensor 23 for detecting the temperature of the rinsing water are provided. A rinsing pump 25 is connected to the hot water storage tank 18 via a rinsing water suction pipe 24. A rinsing water discharge pipe 26 is connected to a discharge port of the rinsing pump 25. The rinsing water discharge pipe 26 branches into a first rinsing water discharge pipe 27 and a second rinsing water discharge pipe 28. The first rinsing water discharge pipe 27 is connected to the upper rinsing nozzle 6. The second rinsing water discharge pipe 28 is connected to the lower rinsing nozzle 8.

  The detergent supply pump 32 is arranged outside the dishwasher 1, that is, outside the main body 2. The detergent supply pump 32 is a bellows pump for supplying the detergent stored in the detergent tank 33 to the cleaning chamber 2A. The detergent supply pump 32 is connected to the detergent discharge pipe 34 connected to the side wall of the cleaning chamber 2A, and is connected to the microcomputer 55 by a signal line. The detergent supply pump 32 operates in response to a signal output from the microcomputer 55, sucks the detergent in the detergent tank 33 from the connected detergent suction pipe 35, and discharges a predetermined amount of the detergent to the detergent discharge pipe. This detergent is provided at the tip of the detergent discharge pipe 34 and is discharged into the cleaning chamber 2A from the detergent discharge port 36 connecting the cleaning chamber 2A and the detergent discharge pipe 34. The detergent discharged into the cleaning chamber 2A flows into the cleaning tank 9 below the cleaning chamber 2A and is mixed with the cleaning water.

  The rinsing agent supply pump 37 is disposed outside the dishwasher 1, that is, outside the main body 2. The rinsing agent supply pump 37 is for supplying the rinsing agent stored in the rinsing agent tank 38 to the rinsing water channel. The rinse agent supply pump 37 is connected to the rinse agent discharge tube 39 communicating with the first rinse water discharge tube 27, and is connected to the microcomputer 55 by a signal line. The rinsing agent supply pump 37 operates according to a signal output from the microcomputer 55, sucks the detergent in the rinsing agent tank 38 from the connected rinsing agent suction tube 40, and discharges the rinsing agent to the rinsing agent discharge tube 39. . The rinsing agent is discharged from the rinsing agent discharge pipe 39 to the rinsing water passage in the rinsing water discharge pipe 26 by the rinsing agent supply pump 37, and mixed with the rinsing water.

  The microcomputer 55 is arranged in the machine room 2B. The microcomputer 55 controls the overall operation of the dishwasher 1. The microcomputer 55 is incorporated in the electrical box 55A. The microcomputer 55 is a computer system or a processor mounted on an integrated circuit. The microcomputer 55 is a part that controls various operations in the dishwasher 1, and is connected to each other such as a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory).

  Next, the operation of the above-described dishwasher 1 will be described. When the power switch is turned on, the dishwasher 1 supplies water into the washing tank 9 by injecting water in the hot water storage tank 18 into the washing chamber 2A by the rinsing pump 25. Thus, initial hot water supply is performed. Then, an amount of detergent corresponding to the initial hot water supply amount is supplied into the washing tank 9, and the detergent concentration of the washing water in the washing tank 9 becomes a predetermined concentration.

  After the initial hot water supply, when the user racks the tableware D and closes the door 4, the door switch (not shown) detects that the door 4 is closed, and an operation start signal is input to the microcomputer 55. When the operation start signal is input to the microcomputer 55, the microcomputer 55 activates the cleaning pump and starts the cleaning of the tableware D (the cleaning step). Washing of tableware D is performed by injecting washing water in washing tank 9 toward tableware D in washing room 2A.

  When the cleaning pump 14 is started, the cleaning water stored in the cleaning tank 9 is sent to the upper and lower cleaning nozzles 5 and 7 via the cleaning water discharge pipe 15 and the like, and the upper and lower cleaning nozzles are sent. It is injected from 5, 7 toward the tableware D in the washing room 2A. The washing water sprayed into the washing chamber 2A is collected in the washing tank 9 while removing residual vegetables and the like washed off from the tableware D by a filter (not shown). Further, the water in the cleaning tank 9 is taken in by the cleaning pump 14 via the pump filter 12 and the like, and supplied again into the cleaning chamber 2A.

  When the cleaning process is completed, the microcomputer 55 activates the drain pump 52 to start discharging the cleaning water stored in the cleaning tank 9 (a drain process). In the dishwasher 1 of the present embodiment, when the washing pump 14 operates, the same amount of washing water as the rinsing water supplied to the washing chamber 2A in the rinsing step described later is discharged from the washing tank 9.

  When the draining process is completed, the microcomputer 55 activates the rinsing pump 25 to start rinsing of the tableware D (rinsing process). Rinsing of tableware D is performed by injecting rinsing water in hot water storage tank 18 toward tableware D in washing room 2A.

  By starting the rinsing pump 25, the rinsing water stored in the hot water storage tank 18 is fed to the upper and lower rinsing nozzles 6, 8 via the rinsing water discharge pipe 26 and the like, and the rinsing nozzles 6, 8 From the tableware D. The rinsing water injected into the tableware D is collected in the cleaning tank 9 via a filter (not shown), mixed with the cleaning water, and used as cleaning water in the next cleaning step.

  When the rinsing water is jetted from the upper and lower rinsing nozzles 6 and 8 to the tableware D, steam is generated in the cleaning chamber 2A. In the dishwasher 1 of the present embodiment, when the rinsing process is started, the exhaust fan 60 starts operating, and the steam generated in the washing chamber 2A is exhausted by the exhaust fan 60 (exhaust process). The operation start timing of the exhaust fan 60 is not limited to this timing, and may be started from a cleaning step in which water is jetted from the upper and lower cleaning nozzles 5 and 7.

  When the steam is exhausted from the cleaning chamber 2 </ b> A by the exhaust fan 60, the steam is pushed up in the first exhaust pipe 63 through the exhaust unit 61 and is sent to the heat exchanger 80. The steam flows through the exhaust passage 83 of the heat exchanger 80. When water that is cooler than the steam flows through the water supply passage 85 in the exhaust passage 83 through which the steam flows, “water vapor” that flows through the exhaust passage 83 and “water” that flows through the water supply passage 85 Heat exchange takes place between the two.

  As a result, the water that has flowed in from one end 85A of the water supply flow path 85 flows out of the other end 85B of the water supply flow path 85 in a state where the temperature is higher than at the time of the flow. In addition, the air containing the steam flowing through the exhaust passage 83 becomes the air having a reduced content of the steam, and is discharged to the cleaning chamber 2A via the second exhaust pipe 65. The air having a reduced content of water vapor discharged into the cleaning chamber 2A is discharged from the cleaning chamber 2A by the exhaust fan 60 together with the water vapor contained in the air and the air containing water vapor in the cleaning chamber 2A, and the cleaning chamber 2A And circulates in the heat exchanger 80.

  Since the water valve 20B is provided on the water supply pipe 21D connected to the other end 85B of the water supply flow path 85, water stays in the water supply flow path 85 depending on the open / close state of the water valve 20B. There are cases. In this case, heat exchange is performed between “water vapor” flowing through the exhaust passage 83 and “water” staying in the water supply passage 85.

  When the water vapor in the cleaning chamber 2A is collected for a predetermined time by the operation of the exhaust fan 60, the operation of the exhaust fan 60 is stopped. When the operation of the exhaust fan 60 is stopped, the flow of steam in the exhaust passage 83 of the heat exchanger 80 stops. As a result, the discharge of the air having the reduced amount of water vapor from the second exhaust pipe 65 into the cleaning chamber 2A is stopped. At this time, almost no steam (steam) exists in the cleaning chamber 2A.

  When the operation of the exhaust fan 60 is stopped, the operation of the heater 90 is started. Thereby, the inside of the housing 81 of the heat exchanger 80 is heated, and the water generated by the condensation of the steam is dried. When a predetermined time elapses after the operation of the heater 90 is started, the operation of the heater 90 is stopped.

  In the dishwasher 1 of the present embodiment, the cumulative number of operations (the number of operations in the present embodiment refers to the number of cycles when the washing step and the rinsing step of the tableware D is one cycle) is a specified number. , A function of discharging all the wastewater stored in the washing tank 9 (total drainage function). The total drainage function is provided for the purpose of replacing cleaning water in the cleaning tank 9 that is gradually contaminated by repeated operation with clean cleaning water.

  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 heater 90 for heating the inside of the heat exchanger 80 is provided, it is possible to heat and dry the water generated by the condensation of the steam by the water supply channel 85. Thereby, in the dishwasher 1, the growth of mold and bacteria in the heat exchanger 80 can be suppressed. As a result, the dishwasher 1 excellent in hygiene can be obtained.

  Further, the dishwasher 1 of the above embodiment includes the microcomputer 55 for controlling the operation of the heater 90. The microcomputer 55 activates the heater 90 when the process of exhausting the water vapor in the cleaning chamber 2A is completed. Thereby, since the inside of the heat exchanger 80 is heated after the condensation of the steam, the water generated by the condensation of the steam can be effectively dried. Therefore, in the dishwasher 1, the growth of mold and bacteria in the heat exchanger 80 can be more effectively suppressed.

  Further, in the dishwasher 1 in the above embodiment, the hot water storage tank 18 for storing the rinsing water used for rinsing the tableware D, the water supply pipe 21C, the water supply pipe 21D, and the water supply flow for circulating the water supplied to the hot water storage tank 18 A road 85. The water supply channel 85 functions as a condensing unit that condenses water vapor discharged from the exhaust unit 61. In the dishwasher 1 having such a configuration, in the heat exchanger 80, heat exchange is performed between steam and water supplied through the water supply passage 85, so that steam can be condensed. In addition, by performing heat exchange between the water supply and the steam passing through the water supply flow path 85 in the heat exchanger 80, the water passing through the water supply flow path 85 is discharged at a temperature higher than that at the time of inflow. You. In the hot water storage tank 18, the water is heated. Therefore, by increasing the temperature of the water supplied to the hot water storage tank 18 in advance, the heating efficiency of the hot water storage tank 18 can be increased.

  Further, in the dishwasher 1 of the above embodiment, the heater 90 is disposed below the heat exchanger 80. In the dishwasher 1 having such a configuration, since heat is effectively distributed in the heat exchanger 80, the water in the heat exchanger 80 can be effectively dried.

  Further, in the dishwasher 1 of the above embodiment, the heater 90 is covered with the aluminum sheet 92. Thereby, the heat of the heater 90 can be effectively dissipated to the entire inside of the heat exchanger 80 by the aluminum sheet 92. Therefore, the water in the heat exchanger 80 can be effectively dried.

  Further, in the dishwasher 1 of the above embodiment, the second exhaust pipe 65 discharges air having a reduced amount of water vapor into the cleaning chamber 2A. The air having a reduced content of water vapor discharged from the second exhaust pipe 65 can dry the washing room 2A and the tableware D. As a result, in the dishwasher 1, the growth of mold and bacteria in the washing room 2A can be suppressed.

  Further, in the dishwasher 1 of the above embodiment, the hole 81C provided in the bottom portion 81B of the housing 81 of the heat exchanger 80 is heated by a discharge portion provided in a corner at the upper part of the main body 2. The water in the exchanger 80 is discharged to the cleaning room 2A. Thus, since the water in the heat exchanger 80 is discharged from the corner of the main body 2 to the washing room 2A, it is possible to suppress the water from adhering to the tableware D.

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

<Modification 1>
In the dishwasher 1 of the above embodiment, an example in which the heater 90 is disposed on the bottom 81B of the heat exchanger 80 has been described as an example, but the present invention is not limited to this. For example, the heating unit may be provided in the water supply channel 85. Specifically, the heating unit may be wound around the water supply channel 85. In this configuration, since the heater is wound around the water supply flow path 85 where dew condensation occurs, the water due to the dew condensation can be effectively dried, and the temperature of the water flowing through the water supply flow path 85 can be increased.

<Modification 2>
In the dishwasher 1 of the above embodiment, an example in which the heater 90 heats the inside of the heat exchanger 80 when the step of exhausting the water vapor in the washing chamber 2A is completed has been described, but the present invention is not limited thereto. Not limited. The timing at which the operation of the heater 90 is started and stopped can be arbitrarily set, and may be appropriately set to a desired timing. For example, the heater 90 may be operated for a certain period of time after the power switch of the dishwasher is turned off, or may be operated when all the washing water is discharged from the washing tank 9. Further, a switch that allows an operator to turn on / off the heater 90 may be provided.

  Further, in the dishwasher 1, when the washing (from the washing step to the exhaust step (rinsing step)) is performed continuously, the operation of the heater 90 may be started after all the washing is completed. In this embodiment, the microcomputer 55 counts the time after the end of the evacuation process, and when the switch for starting the cleaning within a predetermined time is turned ON, determines that the cleaning is performed continuously, and Do not activate 90. On the other hand, the microcomputer 55 activates the heater 90 when the switch for starting the cleaning within the predetermined time is not turned ON.

<Modification 3>
In the dishwasher 1 of the above embodiment, the heater 90 of the heating wire has been described as an example of the heating unit, but the present invention is not limited to this. For example, the heating unit may be a device that blows dry hot air into the heat exchanger 80, or may be in any form as long as it heats (drys) the inside of the heat exchanger 80.

<Modification 4>
In the dishwasher 1 of the above embodiment, an example was described in which the second exhaust pipe 65 discharges the air having a reduced content of water vapor downward into the cleaning chamber 2A, but the present invention is not limited to this. Not done. For example, the second exhaust pipe 65 may be configured to discharge the air having a reduced water vapor content so that the air having a reduced water vapor content is blown onto the inner surface of the cleaning chamber 2A. With this configuration, the cleaning chamber 2A can be effectively dried. In addition, the second exhaust pipe 65 may be configured to discharge air having a reduced amount of water vapor from above the opening through which the tableware D is put in and taken out of the main body. With this configuration, an air curtain can be formed in the opening, and when the door 4 is opened, the release of water vapor from the opening can be suppressed. Further, the second exhaust pipe 65 may discharge air having a reduced amount of water vapor to the outside.

<Modification 5>
In the dishwasher 1 of the above-described embodiment, an example has been described in which the exhaust unit 61 is connected to an upper side surface of the washing chamber 2A, but the present invention is not limited to this. For example, the exhaust unit 61 may be connected to the upper surface of the cleaning room 2A. Further, an example has been described in which the exhaust unit 61 is connected to the first exhaust pipe 63 and the steam is sent out to the heat exchanger 80 via the first exhaust pipe 63. However, the first exhaust pipe 63 is provided. You do not have to. In this case, the exhaust unit 61 may be directly connected to the heat exchanger 80.

<Modification 6>
In the dishwasher 1 of the above embodiment, of the water supply pipe 21C, the water supply pipe 21D, and the water supply flow path 85 that circulate the water supplied to the hot water storage tank 18, the water supply flow path 85 is used as a condenser of the heat exchanger 80. Although the embodiment has been described by way of example, the present invention is not limited to this. For example, the condenser may be a flow path through which other water flows, or may be a device that is electrically cooled.

<Variation 7>
In the dishwasher 1 of the above embodiment, an example in which the exhaust fan 61 is provided in the exhaust unit 61 has been described as an example, but the present invention is not limited to this. The exhaust fan 60 may be provided in the second exhaust pipe 65.

<Other modifications>
In the above-described embodiment and the modified example, the heat exchanger 80 having a configuration in which the feedwater flows through the pipe member and the steam flows around the pipe member has been described as an example, but the steam flows through the pipe member. Then, a heat exchanger having a configuration in which feedwater flows around the heat exchanger may be used.

  In the above-described embodiment and the above-described modified examples, the undercounter-type dishwasher in which the door 4 is provided on the front surface of the washing room 2A has been described as an example. The present invention can also be applied to a washing machine or a conveyor-type dishwasher that performs washing while transporting a rack for accommodating tableware D.

  In the above-described embodiment and the above-described modified example, the heat exchanger 80 is described as an example arranged above the main body 2. However, for example, the heat exchanger 80 may be arranged in the machine room 2B of the main body 2, It may be arranged outside the dishwasher 1. In addition, the hot water storage tank 18 has been described as being arranged in the machine room 2 </ b> B of the main body 2, but may be arranged outside the main body 2. That is, a dishwasher having a configuration in which the external hot water storage tank 18 is provided may be used.

  In the case where a heat exchanger is provided in the above embodiment and the above modified example, a path for supplying water from an external water heater to the hot water storage tank 18 via the heat exchanger 80 and water from the external water heater are provided. Although the configuration in which the path for directly supplying to the hot water storage tank 18 is formed has been described as an example, a configuration in which only the path for supplying to the hot water storage tank 18 via the heat exchanger 80 may be formed.

  In the above-described embodiment, the exhaust fan 60 has been described as an example of the means for discharging water vapor from the cleaning chamber 2A. However, the present invention is not limited to this as long as it is a means that can discharge water vapor from the cleaning chamber 2A to the exhaust part 61.

  The present invention may appropriately combine the contents described in the above embodiment, the above modified examples, and other modified examples without departing from the spirit of the invention.

  DESCRIPTION OF SYMBOLS 1 ... dishwasher, 2A ... washing room, 18 ... hot water storage tank (water supply storage part), 21C, 21D ... water supply pipe (supply part), 60 ... exhaust fan, 61 ... exhaust part, 65 ... second exhaust pipe (discharge) Part), 80: heat exchanger, 85: water supply flow path (condensing part, supply part), 90: heater (heating part).

Claims (6)

A washing machine for washing an object to be washed contained in a washing room,
An exhaust unit that exhausts water vapor in the cleaning chamber;
A heat exchanger having a condensing unit for condensing the water vapor discharged from the exhaust unit,
A heating unit that heats water in the heat exchanger generated by the condensation of the steam by the condensation unit,
A water supply storage unit that stores rinsing water used for rinsing the object to be cleaned,
E Bei and a supply unit for flowing feed water supplied to the water supply storing portion,
The condensing unit is a part of the supply unit, and is a washing machine. A control unit that controls the operation of the heating unit,
The cleaning machine according to claim 1, wherein the control unit activates the heating unit when the step of exhausting the water vapor in the cleaning chamber ends. The heating unit is disposed under the heat exchanger, the washing machine according to claim 1 or 2. The heating unit is provided in the supply unit located in the heat exchanger, the washing machine according to claim 1 or 2. The washing machine according to any one of claims 1 to 4 , further comprising a discharge unit configured to discharge air having a reduced content of the water vapor discharged from the heat exchanger into the cleaning chamber. The cleaning machine according to any one of claims 1 to 5 , wherein the exhaust unit is provided with an exhaust fan that exhausts the water vapor from the cleaning chamber.

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