JP4952342B2 - Dishwasher - Google Patents

Description

  The present invention relates to a dishwasher which is installed in a kitchen or the like and performs storing, automatic cleaning, and drying of an object to be cleaned.

  Conventionally, this type of dishwasher has a configuration in which outside air is blown into a washing tub to dry the object to be washed after the washing is finished, and high temperature and humidity in the washing tub is discharged (for example, Patent Documents). 1).

FIG. 4 shows a conventional dishwasher described in Patent Document 1. In FIG. As shown in FIG. 4, a cleaning tank 1 for storing an object to be cleaned, a cleaning nozzle 4 having a cleaning nozzle 2 for spraying cleaning water and a cleaning pump 3 for pressurizing the cleaning water, and a heating means 5 for heating the cleaning water. And a blower 6 that blows outside air into the cleaning tank 1, an exhaust port 7 that exhausts air inside the cleaning tank 1, and an exhaust assisting means 8 that mixes the outside air provided in the exhaust port 7.
JP 2000-166847 A

  However, in the above-mentioned conventional configuration, the fresh external air is mixed with the exhaust as a substream by the fluid force of the high-temperature and high-humidity mainstream that flows into the exhaust port, and the exhaust that can reduce the temperature of the high-temperature and high-humidity cleaning tank exhaust However, there was a problem that there was not enough air volume to cool down enough to avoid the hot air feeling.

  The present invention solves the above-described conventional problems, and efficiently mixes a sufficient amount of outside air into the exhaust in the washing tank during the drying operation to promote exhaust gas temperature reduction and exhaust water content reduction. An object of the present invention is to provide a dishwasher with improved comfort.

  In order to solve the conventional problem, the dishwasher of the present invention includes a mixing unit having a merging unit that joins the outside air sent from the blower to the washing tank inside air flowing out from the washing tank outlet of the washing tank, An air volume distribution means for distributing the air blown from the blower to the cleaning tank inlet and the mixing section of the cleaning tank, and the air volume distribution means is connected to the cleaning tank inlet via a first rising path rising upward. The merging portion of the mixing portion is connected to the cleaning tank outlet via a second rising path that rises upward.

  As a result, the outside air flowing through the mixing section and the air in the washing tank can be reliably mixed during the drying operation to cool the air in the washing tank, and the water in the washing tank is blown in all operating states from the washing operation to the drying operation. Since it is possible to prevent leakage through the path, the reliability of the equipment can be improved by reliably preventing the feeling of hot air from exhaust with reduced temperature and humidity and preventing water leakage.

  The dishwasher of the present invention can surely prevent the feeling of hot air due to exhaust with reduced temperature and humidity and improve the reliability of the equipment.

  According to a first aspect of the present invention, there is provided a cleaning tank for storing an object to be cleaned, a cleaning means for spraying and circulating cleaning water to the object to be cleaned, a heating means for heating the cleaning water, and an exhaust port for discharging moisture inside the cleaning tank. A blower that blows outside air that has flowed in from outside the machine body, a mixing unit that has a merging part that joins the outside air sent from the blower to the washing tank internal air that flows out from the washing tank outlet of the washing tank, and the blower Air flow distribution means for distributing the blast air to the cleaning tank inlet of the cleaning tank and the mixing section, the air volume distribution means is connected to the cleaning tank inlet via a first rising path rising upward, The merging section of the mixing section is connected to the cleaning tank outlet via a second rising path that rises upward, so that the outside air flowing through the mixing section and the cleaning tank internal air are reliably mixed and cleaned during the drying operation. The inside air of the tank can be cooled. Since the water in the washing tank can be prevented from flowing back and leaking through the air flow path in all operating states of the drying operation, it is possible to reliably prevent the hot air feeling due to exhaust with reduced temperature and humidity and improve the reliability of the equipment. .

  In the second invention, in particular, the second rising path of the first invention is provided with a condensate channel for draining water that has entered the passage, so that the water flowing out from the outlet of the washing tank is recovered. Since it returns to the washing tank side through the water channel, the reliability of preventing water leakage from the mixing section can be further improved.

  In the third invention, in particular, the second rising path of the first or second invention is formed by reversing the flow upward on the downstream side of the descending flow portion that flows downward from the washing tank outlet, By mixing the outside air with the cleaning tank inside air whose fluctuation has been reduced by the upward flow at the junction, it is possible to reduce the occurrence of temperature unevenness in the mixed flow even when the amount of air in the cleaning tank is small, and further to the water to the outside air passage It is possible to prevent intrusion and reduce leakage of the air in the cleaning tank to the exhaust port by natural convection by the descending flow part.

  According to a fourth aspect of the invention, in particular, the air volume distribution means according to any one of the first to third aspects is formed by a damper whose opening degree is changed by wind pressure, and the damper is an outside air passage and a washing tank for blowing air to the mixing section By disposing at the top of the height or in the vicinity of it in both passages of the cleaning tank internal air passage that blows air, it is possible to prevent the damper from changing its opening due to wetness of the damper and dirt such as detergent bubbles. In addition, the durability and reliability of the exhaust cooling operation during the drying operation can be improved.

  According to a fifth aspect of the invention, in particular, the air volume distribution means according to any one of the first to third aspects is formed by a damper whose opening degree is changed by wind pressure, and the damper is an outside air passage and a washing tank for blowing air to the mixing section In the both passages of the cleaning tank internal air passage that blows air to the top of the height or in the vicinity thereof, a check portion for preventing the back flow of water is provided on the upstream side of the damper. Deterioration of the operation of changing the opening degree of the damper due to wetness or dirt such as detergent bubbles is prevented, and further, the moisture that has condensed on the damper surface etc. is prevented from flowing back to the blower side, and the durability of the cooling operation of the exhaust during the drying operation Reliability can be improved and durability of the blower can be improved.

  In the sixth aspect of the invention, in particular, the damper of the outside air passage according to the fourth or fifth aspect of the invention faces the merging portion where the outside air of the mixing portion and the inside air of the washing tank merge, so that when the blower is stopped, The mixing section connected to the cleaning tank outlet provided at the upper part of the cleaning tank has a damper for the outside air passage that is closed even if moisture in the washing tank easily enters. Intrusion can be prevented, condensation on the wall surface of the outside air passage is minimized, and the durability reliability can be improved by preventing the condensed water droplets from flowing down to the blower.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a sectional view showing the structure of the dishwasher according to the first embodiment of the present invention. In FIG. 1, a cleaning means 4 having a cleaning nozzle 2 for jetting and circulating cleaning water to the object to be cleaned and a cleaning pump 3 for pressurizing the cleaning water below a cleaning tank 1 for storing the object to be cleaned such as tableware. And the heating means 5 which heats washing water and heats up is arrange | positioned. Further, the drying means 9 has a blower 6 for blowing outside air to discharge moisture in the cleaning tank 1 and drying the inside of the cleaning tank 1, and an exhaust port 7 for discharging moisture in the cleaning tank 1. Is provided with a cleaning tank inlet 10 through which outside air flows, and a cleaning tank outlet 11 through which air in the cleaning tank 1 (cleaning tank internal air) is discharged.

  An air volume distribution means 12 that distributes the air volume is connected to the downstream side of the blower 6, and an outdoor air passage 14 that introduces outside air into the merging section 13 a of the mixing section 13 and a cleaning tank inlet are connected to the downstream side of the air volume distribution means 12. 10, a cleaning tank internal air passage 15 communicating with the merging section 13 a of the mixing section 13 through the cleaning tank 1 and the cleaning tank outlet 11 is disposed. The mixing unit 13 communicates the outlet side with the exhaust port 7 and communicates the inlet side of the mixing unit 13 with the outside tank 14 and the washing tank outlet 11 which is the washing tank internal air path 15.

  This air volume distribution means 12 distributes the air volume to the outside air passage 14 and the cleaning tank inside air passage 15, and changes the flow rate ratio at the time of mixing the outside air and the cleaning tank inside air in the mixing section 13.

  In this way, the blower 6 is arranged on the upstream side of the air volume distribution means 12, the mixing unit 13 for mixing the outside air and the cleaning tank inside air is arranged on the upstream side of the exhaust port 7, and the drying means 9 is the blower 6, the air volume distribution. The means 12, the mixing part 13 and the exhaust port 7 are formed.

  The control means 16 controls the drying means 9 and is provided on the downstream side of the air volume control section 17 that controls the air volume of the blower 6, the cleaning tank temperature detection section 18 that detects the temperature in the cleaning tank 1, and the mixing section 13. A temperature control unit 21 that sets the control amount of the blower 6 based on the temperature detected by the exhaust temperature detection unit 19 that detects the temperature of the exhaust gas or the outside air temperature detection unit 20 that detects the temperature of the outside air sucked by the blower 6. is doing.

  Further, the cleaning tank 1 is provided with a water supply pipe 23 provided with a water supply valve 22 for supplying cleaning water and a drain pipe 25 provided with a drain valve 24 for draining the cleaning water, and a slide body 27 that can be drawn out from the housing 26. It is stored in. The slide body 27 is provided with a vent 28 communicating with the outside.

  FIG. 2 is a cross-sectional view showing an embodiment of the air volume distribution means 12 shown in FIG. In FIG. 2, the air volume distribution means 12 is formed by a damper 29 whose opening degree changes depending on the pressure of the fluid flowing, that is, the wind pressure of the blower 6, and includes the outside air passage 14 and the cleaning tank inside air passage 15. At least in the cleaning tank air passage 15, when the air pressure is low, the passage resistance on the cleaning tank air passage 15 side is made larger than that on the outside air passage 14 side, and the air volume to the outside air passage 14 side is increased. More than 15 sides.

  Here, one damper 29a arranged in the outside air passage 14 and a plurality of dampers 29b arranged in the cleaning tank inside air passage 15 are respectively provided in the passage. The damper 29 is configured to be closed by its own weight so as to be received by a valve seat 29c slightly inclined from the vertical plane. Moreover, the damper 29a of the outside air passage 14 and the damper 29b of the cleaning tank inside air passage 15 are provided in the uppermost portion, which is the highest position in the height direction, or in the vicinity of the uppermost portion in each passage.

  Further, since the fluid pressure for starting the opening of the damper 29 is set lower on the outside air passage 14 side than the washing tank inside air passage 15, the weight of the damper 29 a in the outside air passage 14 is set to the own weight of the damper 29 b in the washing tank inside air passage 15. It is lighter. Further, on the cleaning tank internal air passage 15 side, a weight 29d is added to the one of the plurality of dampers 29b positioned on the outer periphery side of the bend, and the opening degree of the other damper 29b and the other damper 29b is leveled against the bias that increases the flow velocity. I am doing so.

  Even when the dead weight of the damper 29 is set in this way, in the case of FIG. 2 in which both the dampers 29a and 29b on the outside air passage 14 side and the washing tank inside air passage 15 side are fully opened, the outside air passage 14 and the washing tank inside air are set. The flow distribution to the passage 15 is not determined by the air volume distribution means 12, but is determined by the total pressure loss up to the exhaust port 7 in each passage.

  Therefore, here, the passage pressure loss on the cleaning tank internal air passage 15 side is made smaller than that on the outside air passage 14 side, and the cross sectional area of the cleaning tank 1 forming the cleaning tank internal air passage 15 is sufficiently large. It is easy to design the passage resistance of the passage 15 to be smaller than the passage resistance of the outside air passage 14, and the resistance portion has a reduced cross-sectional area so that the length of the outside air passage 14 is increased or the passage resistance rapidly increases above a predetermined flow rate. By providing (not shown), when the damper 29b on the cleaning tank air passage 15 side is fully opened during the operation as the drying operation proceeds, the air volume on the cleaning tank air passage 15 side is the air volume on the outside air passage 14 side. Have more.

  Further, in order to prevent the backflow of water between the upstream side and the downstream side of the damper 29, a step 30a by the valve seat 29c and a check part 30 by the tapered portion 30b having a high upstream side are formed, and the damper 29 The water that has condensed on the downstream wall surface of the passage and the damper 29 is prevented from flowing into the upstream fan 6 side.

  In this way, the air volume distributing means 12 is set, and the damper 29b on the side of the cleaning tank air passage 15 of the air volume distributing means 12 is formed as a first standing tank air passage 15 rising upward from the cleaning tank inlet 10. It is connected to the cleaning tank 1 via the upper path 31 so that the water in the cleaning tank 1 does not flow backward to the damper 29b on the cleaning tank air passage 15 side.

  In addition, the mixing unit 13 is provided with a second rising path 33 that reverses upward on the downstream side of the downward flow part 32 that flows downward from the cleaning tank outlet 11, and the second rising path 33 that is formed in the cleaning tank internal air passage 15 is provided. The outside air passage 14 from the blower 6 faces the rising passage 33 to form a joining portion 13a, and this joining portion 13a is connected to the second rising passage 33 of the cleaning tank inside air passage 15 extending in the linear direction. Are joined from the side. In addition, a condensate channel 34 having the other end communicated with the cleaning tank 1 side is provided in the lower part of the second rising path 33 in order to drain the cleaning water flowing in from the cleaning tank outlet 11.

  In this way, the merging section 13a of the mixing section 13 is connected to the cleaning tank outlet 11 of the cleaning tank 1 through the second rising path 33 rising upward, and the water in the cleaning tank 1 is a damper on the outside air passage 14 side. It does not flow back to 29a.

  FIG. 3 is a partial cross-sectional perspective view showing the merging portion 13a of the mixing portion 13 shown in FIG. In FIG. 3, the mixing unit 13 has a cleaning tank inside air passage 15 for introducing the cleaning tank inside air and an outside air passage 14 for introducing the outside air, each having a substantially rectangular cross-section with a large aspect ratio, in contact with each other on the long side. Are merged at the junction 13a. The cross section of each passage at the junction 13a is that the outside air passage 14 is a substantially rectangular cross section with the long side having the width Wa and the short side having the height Ha, and the aspect ratio ARa is ARa = Wa / Ha, 15 is a substantially rectangular cross section with a long side having a width Wb and a short side having a height Hb, and the aspect ratio ARb is a flat shape, ARb = Wb / Hb, and is arranged so that the long sides Wa and Wb are in contact with each other. Have joined.

  The stirring portion 37 is formed by a planar body 38 protruding into the mixing passage 35. The planar body 38 extends in the width direction of the mixing passage 35 and is disposed in the entire area of the mixing passage 35. The shaped body 38 is provided with a missing portion 39 formed by eliminating the protrusion or reducing the protrusion amount at a part of the width direction. Here, in FIG. 3, the description of the downward flow portion 32 and the condensate channel 34 of the mixing portion 13 is omitted.

  In addition, the reliability is improved so that the water in the washing tank 1 may not leak by disposing the blower 6, the air volume distribution means 12, or the mixing unit 13 at a position higher than the washing tank inlet 10. Further, the blower 6, the air volume distribution means 12, and the mixing unit 13 are arranged close to each other, and the apparatus can be miniaturized as a compact configuration.

  Further, the mixing unit 13 is provided with a cross-sectional enlarged portion 36 having a larger passage cross-sectional area in the mixing passage 35 on the downstream side of the merging portion 13a and a stirring unit 37 for stirring the flow and promoting the mixing of the cleaning tank internal air and the outside air. ing.

  About the dishwasher comprised as mentioned above, the operation | movement and an effect | action are demonstrated below. First, the slide body 27 is pulled out from the housing 26 to store the tableware, which is the object to be cleaned, in the cleaning tank 1, and the slide body 27 is returned to its original state to start cleaning. When the cleaning operation is started, the water supply valve 22 is opened and water is supplied from the water supply pipe 23 to the cleaning tank 1. When a predetermined amount of water is supplied, the water supply valve 22 is closed and the water supply is stopped. When a certain cleaning pump 3 is operated, hot water is ejected from the cleaning nozzle 2 and sprayed on the tableware that is the object to be cleaned. The cleaning nozzle 2 is rotated by the reaction force of the cleaning water jetting, so that the cleaning water is spread over the object to be cleaned, thereby improving the cleaning performance.

  Here, the case where the heating means 5 is operated and washed with warm water is shown. However, if the object to be cleaned is weakly soiled, the heating means 5 may be operated without operating the water supply temperature, and the object to be cleaned may be contaminated. If it is strong, wash with detergent. When the cleaning operation is completed, the drain valve 24 is opened, and the cleaning water is drained from the drain pipe 25 to the outside of the housing 26. When draining is completed, the drain valve 24 is closed.

  In the next rinsing operation, water is supplied in the same manner as in the cleaning operation without adding detergent, and hot water is ejected from the cleaning nozzle 2 by the operation of the heating means 5 and the cleaning pump 3 and sprayed on the tableware to be cleaned. Let Since the object to be cleaned is dried after the rinsing operation, the object to be cleaned is preferably warmed in the rinsing operation, and sterilization can be performed by rinsing with high-temperature water of about 70 ° C to 80 ° C. . After the rinsing operation is completed, the rinsing water in the cleaning tank 1 is drained in the same manner as at the end of the cleaning operation.

  In the next drying operation, the blower 6 is operated and the outside air passage 14 is cleaned by the air volume distribution means 12 in order to discharge the air in the cleaning tank 1 that has become hot and humid by the rinsing operation and dry the object to be cleaned. The air is diverted to the tank internal air passage 15 and the outside air is sent to the mixing unit 13 and the cleaning tank 1.

  First, in order to prioritize cooling the air in the cleaning tank at the beginning of drying, the amount of air blown from the blower 6 is reduced to open the damper 29a on the outside air passage 14 side with a low wind pressure, and the air amount toward the outside air passage 14 side is increased. Outside air with a large air volume (indicated by the black arrow in FIG. 3) and high temperature and high humidity air in the cleaning tank with a small air volume (indicated by the white arrow in FIG. 3) Are mixed at the merging portion 13a of the mixing portion 13 and mixed, and the cross-sectional enlarged portion 36 slows the flow velocity of the flow after merging of the cleaning tank inside air and the outside air to promote the elimination of moisture condensed by cooling and further stirring. In the unit 37, the inside air and outside air are mixed evenly, and the exhaust gas that has been cooled and reduced in water content is caused to flow out from the exhaust port 7.

  Next, when the humidity in the cleaning tank 1 decreases due to the progress of the drying operation, the operation giving priority to the drying in the cleaning tank 1 is performed, and the air volume of the blower 6 is increased so that the dampers 29a and 29b of both passages are set. The fully opened state is set as shown in FIG. When the dampers 29a and 29b are fully opened, the distribution to the outside air passage 14 and the washing tank internal air passage 15 is performed according to the passage resistance, and the air volume to the washing tank inside air passage 15 is larger than the air volume to the outside air passage 14 side. It is distributed and blown mainly for drying.

  In particular, control is performed mainly by reducing the exhaust temperature at the beginning of the drying operation so that the high-temperature and high-humidity air in the cleaning tank 1 is not directly discharged from the exhaust port 7 when rinsing with high-temperature water is performed. The blower 6 is controlled by the air volume control unit 17 of the means 16 so that the air volume to the outside air passage 14 side becomes larger than the air volume to the cleaning tank inside air passage 15 side.

  Thus, distribution to the outside air passage 14 and the cleaning tank inside air passage 15 is performed according to the fluid pressure due to the opening degree change of the damper 29 depending on the amount of air blown by the blower 6, and the exhaust with cooling and moisture reduction as described above is performed. Since it flows out from the exhaust port 7, the structure can be simplified and the cost can be reduced.

  In all the operating situations such as the cleaning operation, the rinsing operation, and the drying operation described above, the drying means 9 is connected to the cleaning tank 1 via the first rising path 31 and the second rising path 33, so that the cleaning tank It is possible to prevent the water in 1 from leaking back through the air flow path, and not only to reliably prevent the feeling of hot air due to the exhaust air with reduced temperature and humidity during drying operation, but also to prevent water leakage and improve the reliability of the equipment .

  Further, a condensate channel 34 communicating with the cleaning tank 1 side is provided below the second rising path 33 so that water that has entered the second rising path 33 is drained to the cleaning tank 1 side. Since the occurrence of water leakage from the outside air passage 14 and the exhaust port 7 is prevented, the reliability of preventing water leakage from the mixing unit 13 can be further improved.

  Furthermore, when the second rising path 33 located after being formed by being inverted upward and downstream of the descending flow section 32 is provided with the merging section 13a facing the outside air passage 14, the amount of air in the cleaning tank is small. However, since the outside air heated by the cleaning tank internal air rises and flows toward the exhaust port 7 side, the rising flow after mixing stabilizes, and the rising flow with reduced fluctuations causes temperature unevenness due to flow fluctuations And prevention of water intrusion into the outside air passage.

  Further, by interposing the descending flow portion 32, it is possible to prevent the cleaning water from entering the outside air passage 14 and reduce the leakage of the air in the cleaning tank to the exhaust port 7 due to natural convection even during the cleaning operation and the rinsing operation. Further, by setting the outside air passage 14 to be merged from the side with respect to the washing tank inside air passage 15, the air volume of the outside air is particularly larger than the air volume of the washing tank inside air at the beginning of the drying operation. When the main purpose is to reduce the exhaust gas temperature, the outside air can be disturbed by bending in the cleaning tank internal air passage 15 and spread to the cleaning tank internal air with a stirring action. And the temperature distribution can be equalized.

  Further, by providing a cross-sectional enlarged portion 36 having a larger passage cross-sectional area downstream of the merging portion 13a, the flow velocity after the merging of the cleaning tank inside air and the outside air is slowed down to cause flow fluctuations such as vortices. In the agitation unit 37, the mixing flow of the cleaning tank inside air and the outside air is strongly agitated to promote mixing, and the cleaning tank inside air and the outside air are mixed evenly to promote atomization of moisture by cooling.

  Further, the stirring portion 37 is formed by projecting a planar body 38 extending in the width direction of the mixing passage 35 and providing a missing portion 39 in a part of the width direction, thereby inducing disturbance in the flow in the width direction and stirring. Thus, the temperature distribution can be stabilized over the entire area of the mixing passage, and the configuration can be simplified and the cost can be reduced by forming the passage integrally with the passage wall.

  Further, the damper 29 of the air volume distribution means 12 is disposed at the top of the height or in the vicinity thereof in both the outside air passage 14 for blowing air to the mixing section 13 and the washing tank inside air passage 15 for blowing air to the washing tank 1. When the damper 29 gets wet with water, or when a detergent with a lot of surfactant is used by mistake, the detergent adheres to the damper 29, or the opening of the damper 29 is caused by dirt such as dirt adhering to water or foam. It is possible to prevent the change operation from deteriorating and to improve the durability reliability of the exhaust cooling operation during the drying operation.

  Further, since the damper 29 is disposed at the uppermost portion and the check portion 30 is provided on the upstream side thereof, not only the above-described deterioration of the opening changing operation of the damper 29 is prevented, but also the damper 29 itself or the surrounding wall surface. In addition, the moisture generated by the condensation prevents the reverse flow to the blower 6 side, improving the durability reliability of the exhaust cooling operation during the drying operation and improving the durability reliability of the blower.

  By the way, when the blower 6 is operated as in the drying operation, the moisture in the cleaning tank 1 does not cause a back flow, but the moisture is not in the cleaning tank 1 during the cleaning operation, the rinsing operation, or when the equipment is stopped. When the blower 6 is not operated in a certain state, there is a possibility that moisture flows backward to the blower 6 side. However, here, the damper 29 is provided in the outside air passage 14 and the cleaning tank inside air passage 15, and since the damper 29 is closed, the backflow of moisture can be prevented.

  In particular, the outside air passage 14 connected to the washing tank outlet 11 provided at the upper part of the washing tank 1 is easily exposed to moisture. However, since the damper 29 is provided at a position facing the joining portion 13a, the outside air passage is exposed to the vicinity of the joining portion. Intrusion can be prevented, condensation on the wall surface of the outside air passage and the like can be minimized, and the durability can be improved by preventing the condensed water droplets from flowing down to the blower.

  In this way, the merging section 13a of the mixing section 13 mixes the outside air with the high-temperature and high-humidity cleaning tank air, and cools and condenses the moisture contained in the cleaning tank air. In order to realize such a mixing unit 13, it is necessary to uniformly and quickly mix the inside air and outside air of the cleaning tank.

  Therefore, the cleaning tank inside air passage and the outside air passage each have a substantially rectangular cross-sectional shape having a large aspect ratio and are joined together by contacting the long sides of each other, thereby promoting mixing by mixing the flows with reduced thickness. Even during the drying operation, a sufficient amount of outside air is reliably mixed in a compact space with the air in the high-temperature and high-humidity cleaning tank (air in the cleaning tank), and the air in the cleaning tank is removed. Since it can be cooled, it is possible to reliably prevent the feeling of hot air by exhausting with reduced temperature and humidity and to downsize the equipment.

  In the above description, the case where the cross section of the outside air passage 14 and the cleaning tank inside air passage 15 is a complete rectangle has been shown. However, for ease of processing, the corner portion of the cross section is provided with a curvature, draft angle, etc. Needless to say, a trapezoidal shape with a taper may be used to improve workability, and a flat passage for improving flow may be formed by providing a large curvature or unevenness on the long side.

  Moreover, although the damper 29 showed the structure closed by its own weight, you may give closing force by urging | biasing with a spring etc., and the freedom degree of an attachment attitude | position can be improved with the urging | biasing force of a spring.

  As described above, in the present embodiment, the air volume distribution means is connected to the cleaning tank inlet via the first rising path that rises upward, and the merging portion of the mixing section is connected via the second rising path that rises upward. By connecting with the outlet of the washing tank, the outside air flowing through the mixing section and the inside of the washing tank can be reliably mixed during the drying operation to cool the inside of the washing tank, and in all operating states from the washing operation to the drying operation. Since it is possible to prevent the water in the washing tank from flowing back and leaking through the ventilation path, it is possible to reliably prevent a hot air feeling due to exhaust with reduced temperature and humidity and improve the reliability of the equipment.

  In addition, the second rising path of the present embodiment is provided with a condensate channel for draining the water that has entered the passage, so that the water that flows out from the washing tank outlet passes through the condensate channel to the washing tank. Since it returns to the side, the reliability of preventing water leakage from the mixing section can be further improved.

  In addition, the second rising path of the present embodiment is formed by inverting the flow upward on the downstream side of the downward flow portion that flows downward from the outlet of the cleaning tank, thereby reducing fluctuations due to the upward flow at the junction. Mixing the outside air with the washed air inside the washing tank can reduce the occurrence of temperature unevenness in the mixed flow even when the air flow inside the washing tank is small, and further prevent water from entering the outside air passage and natural convection by the downward flow part. Leakage of the air in the cleaning tank to the exhaust port can be reduced.

  Further, the air volume distribution means of the present embodiment is formed by a damper whose opening degree changes depending on the wind pressure, and the damper is high in both the outside air passage that blows air to the mixing unit and the washing tank inside air passage that blows air to the washing tank. By placing it at or near the top of the wall, it is possible to prevent the deterioration of the operation of changing the opening of the damper due to the wetness of the damper and the adhesion of dirt such as detergent bubbles, and the durability reliability of the cooling operation of the exhaust during the drying operation Can be improved.

  Further, the air volume distribution means of the present embodiment is formed by a damper whose opening degree changes depending on the wind pressure, and the damper is high in both the outside air passage that blows air to the mixing unit and the washing tank inside air passage that blows air to the washing tank. And a non-return portion for preventing the backflow of water on the upstream side of the damper so that the damper can be opened due to wetness of the damper or adhesion of dirt such as detergent bubbles. Deterioration of the temperature change operation is prevented, and moisture flowing back on the damper surface is prevented from flowing back to the blower side, improving the durability reliability of the exhaust cooling operation during drying operation and improving the durability reliability of the blower .

  In addition, the damper of the outside air passage according to the present embodiment is arranged facing the junction where the outside air of the mixing unit and the inside of the washing tank meet, so that the washing provided at the upper part of the washing tank when the blower is stopped The mixing section connected to the tank outlet has the damper of the outside air passage closed even if the moisture inside the washing tank easily enters, so the outside air passage can prevent the intrusion of moisture to the vicinity of the merging section. The durability reliability can be improved by minimizing the dew condensation on the air and so on so that the dewdrops do not flow down to the blower.

  As described above, the dishwasher according to the present invention can surely prevent the hot air feeling of the exhaust temperature during drying and can be cooled according to the generated high-temperature and high-humidity air conditions. It can be applied to household appliances such as electric water heaters.

The block diagram of the dishwasher in Embodiment 1 of this invention Sectional view of the air volume distribution means in FIG. Partial cross-sectional perspective view of the mixing portion in FIG. Configuration of conventional dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing tank 4 Washing means 5 Heating means 6 Blower 7 Exhaust port 9 Drying means 10 Washing tank inlet 11 Washing tank outlet 12 Air volume distribution means 13 Mixing part 13a Merge part 14 Outside air path 15 Washing tank air path 29 Damper 30 Check part 31 First rising path 32 Lowering flow part 33 Second rising path 34 Condensate path

Claims (6)

A cleaning tank for storing the object to be cleaned, a cleaning means for spraying and circulating cleaning water to the object to be cleaned, a heating means for heating the cleaning water, an exhaust port for discharging moisture inside the cleaning tank, and an inflow from outside the machine body A blower that blows the outside air that is allowed to flow, a mixing unit that has a merging unit that joins the outside air sent from the blower to the washing tank internal air that flows out from the washing tank outlet of the washing tank, and the ventilation of the blower to the washing tank And an air volume distribution means for distributing to the mixing section, the air volume distribution means being connected to the cleaning tank inlet via a first rising path rising upward, and the merging section of the mixing section Is a dishwasher connected to the outlet of the washing tank through a second rising path that rises upward. 2. The dishwasher / dryer according to claim 1, wherein the second rising path is provided with a condensate channel for draining water that has entered the passage. The dishwasher / dryer according to claim 1 or 2, wherein the second rising path is formed by reversing the flow upward on the downstream side of the descending flow portion that flows downward from the washing tank outlet. The air volume distribution means is formed by a damper whose opening degree changes depending on the wind pressure, and the damper is at the top of the height or in the vicinity thereof in both the outside air passage that blows air to the mixing section and the inside air passage that blows air to the washing tank The dishwasher according to any one of claims 1 to 3, wherein the dishwasher is disposed on the dishwasher. The air volume distribution means is formed by a damper whose opening degree changes depending on the wind pressure, and the damper is at the top of the height or in the vicinity thereof in both the outside air passage that blows air to the mixing section and the inside air passage that blows air to the washing tank The dishwasher according to any one of claims 1 to 3, further comprising a check portion that prevents backflow of water on an upstream side of the damper. The dishwasher / dryer according to claim 4 or 5, wherein the damper of the outside air passage is arranged facing a junction where the outside air of the mixing unit and the inside of the washing tank meet.