JP4238887B2 - 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. 7 shows a conventional dishwasher described in Patent Document 1. In FIG. As shown in FIG. 7, 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 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 flowing into the exhaust port, and the temperature of the exhaust in the high-temperature and high-humidity cleaning tank 1 can be reduced. However, there was a problem that there was not enough air volume to cool down enough to avoid the hot air feeling of the discharged wind.

  The present invention solves the above-mentioned conventional problems, and mixes a sufficient amount of outside air into the cleaning tank exhaust during the drying operation to promote the reduction of the exhaust temperature and the reduction of the moisture content in the exhaust. The object is to provide a dishwasher with enhanced comfort.

  In order to solve the above-described conventional problems, the dishwasher of the present invention is characterized in that the drying means includes a mixing unit that mixes the outside air and the washing tank inside air arranged on the upstream side of the exhaust port, and the outside air and the washing tank inside air. An air volume distribution means for changing the mixing ratio is provided.

  As a result, the flow rate ratio between the outside air flowing through the mixing section and the washing tank inside air can be freely distributed and set during the drying operation, so that both the reliable prevention of hot air feeling due to exhaust with reduced temperature and humidity and the improvement of drying performance can be achieved. it can.

  The dishwasher / dryer of the present invention can achieve both the reliable prevention of hot air feeling and the improvement of drying performance due to exhaust with reduced temperature and humidity discharged during the drying operation.

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. And a drying means having a blower, and a control means for controlling the drying means, wherein the drying means is a mixing section for mixing the outside air and the washing tank inside air arranged on the upstream side of the exhaust port, and the outside air and the washing tank. It has an air volume distribution means for changing the mixing ratio with the inside air, and during the drying operation, the air blower is operated to introduce an outside air into the mixing section by the air volume distribution means, and the mixing is performed through the washing tank. The air was diverted to the air passage in the washing tank communicating with the section, and the air volume into the washing tank was changed. As a result, during the drying operation , a sufficient amount of outside air is mixed in the mixing section for cooling with the air in the high-temperature and high-humidity cleaning tank (air in the cleaning tank), and the hot air feeling of the exhaust is reduced by cooling the exhaust and reducing the moisture. Both prevention and improvement of drying performance can be achieved. In addition, by changing the air flow rate of the blower to change the mixing ratio between the outside air and the cleaning tank air, the control range of the exhaust air temperature can be increased by expanding the control range of the air volume ratio between the cleaning tank air and the outside air. In addition, the drying time can be shortened by increasing the air volume in the washing tank.
Can improve drying performance.

  In the second invention, in particular, the blower of the first invention is arranged on the upstream side of the air volume distribution means, so that drying and exhaust cooling can be shared by one blower, and the size and cost can be reduced. In addition, power can be saved by sharing.

In the third aspect of the invention, in particular, the air volume distribution means of the first or second aspect of the invention includes an outside air passage for introducing outside air to the mixing unit, and a cleaning tank communicating with the mixing unit from the blower through the washing tank. By providing the air passage, and the valve body portion that changes the opening area of the outside air passage and the cleaning tank air passage, the passage resistance is determined according to the opening position of the valve body portion, and the opening position of the valve body portion Since reproducibility can be ensured, the controllability and stability of the distribution ratio can be improved.

  In the fourth aspect of the invention, in particular, the air volume distribution means of the third aspect of the present invention has a large volume because the air volume to the outside air passage side is larger than the air volume to the cleaning tank inside air passage side at the start of operation of the blower. By mixing a small amount of high-temperature and high-humidity cleaning tank air with the outside air, the high-temperature exhaust at the start of drying can be reliably prevented and the comfort can be improved.

  In the fifth aspect of the invention, in particular, the air volume distribution means of the third aspect of the invention is configured such that the air passage in the cleaning tank is closed during the cleaning operation or the rinsing operation, so that the air in the cleaning tank flows out from the exhaust port by natural convection. Therefore, the comfort of the indoor space can be improved by reducing the outflow of moisture and the energy saving can be improved by reducing the heat radiation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

(Embodiment 1)
FIG. 1 is a cross-sectional view showing the configuration 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 an inflow port 10 through which outside air flows in and an outflow port 11 through which air in the cleaning tank 1 (cleaning tank internal air) is discharged.

  An air volume distribution means 12 for distributing the air volume is connected to the downstream side of the blower 6, and an external air passage 14 for introducing outside air into the mixing unit 13 and an inlet 10 of the cleaning tank 1 are connected to the downstream side of the air volume distribution means 12. A cleaning tank internal air passage 15 communicating with the mixing unit 13 through the cleaning tank 1 and the outlet 11 is disposed. In addition, 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 outflow port 11 which is the outside air passage 14 and the cleaning tank inside air passage 15.

  In this way, the blower 6 is arranged upstream of the air volume distribution means 12, and the mixing unit 13 that mixes the outside air and the cleaning tank inside air is arranged upstream of the exhaust port 7. The air volume distribution means 12 distributes the air volume by changing the flow resistance to the outside air passage 14 and the washing tank inside air passage 15, and changes the flow rate ratio when the outside air and the washing tank inside air are mixed in the mixing unit 13. Let

  The control means 16 controls the drying means 9, and sets the control amount based on the air temperature control section 17 that controls the air volume of the blower 6 and the temperature detected by the temperature detection section 18 provided on the downstream side of the mixing section 13. A temperature control unit 19 is provided.

The air volume distributing means 12 distributes the air volume by providing a valve body section 20 that changes the opening area to the outside air passage 14 and the cleaning tank internal air path 15. The opening degree control part 21 which controls the opening degree of the valve body part 20 according to is provided.

  Thus, the drying means 9 is not only the exhaust port 7 and the blower 6 but also the mixing unit 13 for mixing the outside air and the cleaning tank inside air arranged on the upstream side of the exhaust port 7 and the mixing of the outside air and the cleaning tank inside air. Air volume distribution means 12 for changing the ratio is provided.

  The cleaning tank 1 is provided with a water supply pipe 23 having a water supply valve 22 for supplying cleaning water and a drain pipe 25 having 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. The slide body 27 is provided with a vent 28 communicating with the outside.

  FIG. 2 shows the valve body portion 20 of the air volume distribution means 12 shown in FIG. 1. The valve body portion 20 has a cylindrical surface and can be turned to the outside air passage 14 side and the cleaning tank inside air passage 15 side. Here, the opening degree is changed. Here, the cleaning tank internal air passage 15 side is fully closed and the external air passage 14 side is shown in a fully open state.

  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. By the operation of a certain washing pump 3, hot water is jetted from the washing nozzle 2 and sprayed and circulated on the tableware that is the object to be washed.

  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. Although the case where the heating means 5 is operated and washed with warm water is shown here, if the object to be cleaned is weakly soiled, the heating means 5 may be cleaned without operating the water supply temperature. If the dirt is strong, clean it 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. In particular, when the operation of rinsing with high-temperature water is performed, the outside air is controlled by the opening degree control unit 21 of the control means 16 so that the high-temperature and high-humidity air in the cleaning tank 1 is not directly discharged from the exhaust port 7 at the start of the operation of the blower 6. The opening area is controlled so that the air volume toward the passage 14 is larger than the air volume toward the cleaning tank internal air passage 15.

  As a result, exhaust gas is produced by mixing a small amount of high-temperature and high-humidity cleaning tank air with a large amount of outside air, so that the cooling performance of the cleaning tank air by the outside air is improved and high-temperature exhaust gas is discharged at the start of the drying operation. In addition, it is possible to reduce the moisture in the exhaust by condensing and draining the moisture in the cleaning tank air when the cleaning tank air is cooled by outside air. Comfort can be improved.

  In addition, as shown in FIG. 2, the valve body 20 closes the cleaning tank internal air passage 15 side in a fully closed state at the start of operation of the blower 6, and gradually closes the outside air passage 14 side in a fully open state to gradually move into the cleaning tank. By opening the air passage 15 side, it is possible to control a large amount of outside air to be mixed with a small amount of air inside the washing tank, so that high-temperature and high-humidity exhaust is more reliably prevented from being discharged from the exhaust port 7. it can. Furthermore, in the cleaning operation or the rinsing operation, the cleaning tank air passage 15 side is closed in a fully closed state, thereby reducing the outflow of the cleaning tank air from the exhaust port 7 due to natural convection and the outflow of moisture. It is possible to improve indoor space comfort by reducing energy savings by reducing heat dissipation.

  Further, as the drying operation proceeds, the humidity of the cleaning tank air decreases due to the inflow of the outside air into the cleaning tank 1, and the enthalpy of the cleaning tank air decreases, so that the temperature of the exhaust gas flowing out from the exhaust port 7 is a predetermined value. The amount of outside air required for cooling below can be reduced. Accordingly, the amount of the outside air flow to the mixing unit 13 can be reduced as the drying state progresses, and the amount of the air flowing into the washing tank 1 is increased by diverting the amount to the washing tank air passage 15 side. The drying performance of an object can be improved. Therefore, based on the temperature detected by the temperature detector 18, the opening control unit 21 drives the valve body 20 of the air volume distribution means 12 with a stepping motor (not shown) or the like in accordance with a signal from the temperature controller 19. The drying rate is increased by changing the air flow rate to the cleaning tank air passage 15 side.

  For this reason, the mixing unit 13 generates the hot air feeling of the exhaust temperature by stabilizing the exhaust temperature and promoting the cooling by mixing the outside air into the cleaning tank inside air and changing the air volume distribution, and is generated when the air in the cleaning tank is cooled. The humidity reduction of the exhaust can be promoted by reducing the moisture in the cleaning tank due to condensation. Furthermore, by making the air volume distribution variable, it is possible to both prevent high-temperature exhaust and ensure the drying performance.

  Further, since the passage resistance to each passage is uniquely determined by the opening position where the rotating valve body portion 20 is stopped, and the reproducibility of the opening position of the valve body portion can be ensured, the controllability and stability of the distribution ratio can be ensured. Can be improved.

  Up to this point, the case where drying is performed by using the residual heat of the object to be cleaned during the rinsing operation without operating the heating unit 5 during the drying operation has been described. However, the cleaning is performed by operating the heating unit 5 during the drying operation. It goes without saying that drying can be promoted by heating and raising the temperature of the outside air flowing into the tank 1 from the inlet 10. The drying performance is increased by increasing the output of the heating means 5 as the wind speed in the vicinity of the heating means 5 is kept high. Can be increased.

  In particular, by changing the air volume of the blower 6 by the air volume control unit 17 during the drying operation, the air volume to the cleaning tank internal air passage 15 side is ensured to be a predetermined value or more regardless of the distribution state of the air volume distribution unit 12. The wind speed at 10 can be increased and heat transfer in the heating means 5 can be promoted. Therefore, the control range of the exhaust temperature can be improved by expanding the air volume ratio control range between the cleaning tank internal air and the outside air, and further, the drying time can be shortened or the drying performance can be improved by increasing the cleaning tank internal air flow.

  Further, either when the air volume control unit 17 of the control means 16 controls the air volume of the blower 6 or when the opening degree control part 21 of the control means 16 controls the opening degree of the valve body part 20 of the air volume distribution means 12. Even in this case, since the air from one blower 6 is distributed to cool and dry the exhaust, it is possible to reduce the size and cost, and to save power by sharing.

FIG. 3 shows a case where the opening degree is changed by rotating the valve body part 20 of the air volume distribution means 12, and the opening degree on the cleaning tank inner air passage 15 side is increased to open the outer air passage 14 side. The flow rate on the cleaning tank inside air passage 15 side is made larger than the flow rate on the outside air passage 14 side, as shown by arrows in the figure. For this reason, the air volume to the washing tank 1 increases, drying of a to-be-cleaned object can be accelerated | stimulated, and drying performance can be improved. In addition, since the opening of one side is increased by the movement of the valve body portion 20 in this way, the opening of the other side is decreased to keep the ventilation resistance to the blower 6 substantially constant, so that The controllability of the exhaust temperature can be improved by stabilizing the operating point of use and suppressing the change in air volume.

  In addition, although the case where the air volume control unit 17 of the control means 16 controls the air volume of the blower 6 and the case where the air volume distribution of the air volume distribution means 12 is changed based on the temperature detected by the temperature detection unit 18 is shown, the elapsed time of the drying operation It is possible to change the air volume distribution by the above, and it goes without saying that the temperature detector 18 can be omitted and the cost can be reduced.

  As described above, in the present embodiment, the drying means changes the mixing ratio of the outside air and the cleaning tank inside air, which is arranged on the upstream side of the exhaust port, and the mixing ratio of the outside air and the cleaning tank inside air. By providing air volume distribution means, a sufficient amount of outside air is mixed in the mixing section for cooling to the air in the high-temperature, high-humidity cleaning tank (cleaning tank internal air) during drying, and cooling of the exhaust and moisture reduction Both prevention of hot air feeling of exhaust and improvement of drying performance can be achieved.

  Further, since the blower is arranged on the upstream side of the air volume distribution means, drying and exhaust cooling can be shared by a single blower, and the size and cost can be reduced, and power saving can be achieved by sharing.

  In addition, the control means is configured to change the mixing ratio between the outside air and the cleaning tank inside air by changing the air volume of the blower, thereby expanding the control range of the air volume ratio between the cleaning tank inside air and the outside air and increasing the exhaust temperature. Controllability can be improved, and further, the drying time can be shortened or the drying performance can be improved by increasing the amount of air in the washing tank.

  The air volume distribution means includes an outside air passage for introducing outside air into the mixing section, a washing tank inside air passage communicating from the blower through the washing tank to the mixing section, and an opening area of the outside air passage and the washing tank inside air passage. By providing the valve body portion to be changed, the passage resistance is determined according to the opening position of the valve body portion and the reproducibility of the opening position of the valve body portion can be ensured, so that the controllability and stability of the distribution ratio can be improved. .

  In addition, the air volume distribution means is configured so that the air volume to the outside air passage side is larger than the air volume to the inside air passage side at the start of the blower operation. By mixing and exhausting the inside air, high-temperature exhaust at the start of drying can be reliably prevented, and comfort can be improved.

  In addition, the air volume distribution means closes the air passage in the washing tank during the washing operation or the rinsing operation, thereby reducing the outflow of the washing tank air from the exhaust port due to natural convection and the outflow of moisture. It is possible to improve indoor space comfort by reducing energy savings by reducing heat dissipation.

(Embodiment 2)
FIG. 4 is a block diagram of the air volume distribution means of the second embodiment of the present invention. 4, the same members and functions as those of the embodiment of FIGS. 1 to 3 are denoted by the same reference numerals, detailed description thereof is omitted, and different points will be mainly described.

  The air volume distribution means 12 is a damper 29 whose opening degree changes depending on the pressure of the flowing fluid (indicated by an arrow in the figure), that is, the wind pressure of the blower 6, and each passage of the outside air passage 14 and the cleaning tank air passage 15 is provided. Is provided in at least the cleaning tank internal air passage 15 so that the passage resistance on the cleaning tank internal air passage 15 side is larger than that on the external air passage 14 side, and the air volume to the external air passage 14 side is larger than that on the cleaning tank internal air passage 15 side. I try to increase.

  Here, a plurality of dampers 29a, 29a arranged in the outside air passage 14 and a plurality of dampers 29b, 29b arranged in the cleaning tank inside air passage 15 are provided in both the outside air passage 14 and the washing tank inside air passage 15. Yes. The fulcrum 30 of the damper 29 is arranged and supported above the center of gravity, and the damper 29 is closed by its own weight so as to be received by a valve seat 31 slightly inclined from the vertical plane.

  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 thickness T1 of the damper 29a of the outside air passage 14 is set to the damper 29b of the washing tank inside air passage 15. The damper 29a on the outside air passage 14 side is lighter than the damper 29b on the cleaning tank inside air passage 15 side.

  Further, by providing a plurality of dampers 29a, 29a, 29b, 29b in each passage, the lengths L1, L2 from the fulcrum 30 of the damper 29 can be shortened, and even when the damper 29 is fully opened, it can be stored in a smaller space. The air volume distribution means 12 can be downsized. Furthermore, it becomes easy to increase the cross-sectional area of each passage.

  FIG. 4 shows a state in which the damper 29a of the outside air passage 14 starts to open due to the wind pressure increased by the operation of the blower 6, and the damper 29b of the cleaning tank inside air passage 15 is still closed. The outside air thus flows flows toward the outside air passage 14 as indicated by arrows in the figure.

  FIG. 5 shows a state where the damper 29b of the cleaning tank internal air passage 15 has started to open by increasing the air pressure by increasing the air volume of the blower 6 from the air volume in FIG. The outside air sent from the blower 6 flows into both the outside air passage 14 and the washing tank inside air passage 15, and the air volume on the outside air passage 14 side is as indicated by the size of the arrow in the drawing. It is flowing more than the side.

  FIG. 6 shows that the air flow control unit 17 of the control means 16 further increases the air flow of the blower 6 from the air flow in FIG. 29a and 29b are shown in a fully open state, and the flow distribution to the outside air passage 14 and the cleaning tank inside air passage 15 is not determined by the air volume distribution means 12, but by the total pressure loss up to the exhaust port 7 in each passage. It will be decided.

  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 15 to be smaller than the passage resistance of the outside air passage 14, and the length of the outside air passage 14 is increased, or a resistance portion (not shown) that increases the passage resistance at a predetermined flow rate or more is provided. Thus, when the damper 29b on the cleaning tank internal air passage 15 side is fully opened during the operation as the drying operation proceeds, the air volume on the cleaning tank internal air path 15 side is greater than the air volume on the outside air passage 14 side.

In the dishwasher configured as described above, the operation and action will be described below. The washing and rinsing operations are as described above. In the drying operation, the blower 6 is operated and the outside air is sent to the air volume distribution means 12 at the start of the drying operation. First, in the case where the damper 29 is provided only on the cleaning tank internal air passage 15 side, since the passage resistance on the external air passage 14 side is small, the air volume to the external air passage 14 side is larger than that on the cleaning tank internal air passage 15 side, In step 13, the outside air with a large air volume is mixed with the high-temperature, high-humidity cleaning tank air with a small air volume, and the exhaust gas that has been cooled and reduced in water is discharged from the exhaust port 7. Thus, by providing the damper 29 only on the cleaning tank internal air passage 15 side, the passage resistance from the blower 6 to the exhaust port 7 can be reduced, and the blower 6 can be reduced in size and input. Next, when the dampers 29 are provided in both the outside air passage 14 and the washing tank inside air passage 15, the distribution to the outside air passage 14 and the washing tank inside air passage 15 is not limited to the fluid pressure even if the air volume is changed during the operation of the blower 6. Accordingly, the exhaust gas that has been cooled and moisture-reduced as described above is allowed to flow out of the exhaust port 7, so that the configuration can be simplified and the cost can be reduced.

  Further, since the fluid pressure at which the damper 29 starts to open is lower on the outside air passage 14 side than on the washing tank inside air passage 15 side, the wind on the outside air passage 14 side is earlier than the washing tank inside air passage 15 side. The exhaust temperature of the exhaust gas flowing out from the exhaust port 7 can be gradually increased from the outside air temperature, and high-temperature exhaust due to an exhaust temperature overshoot is prevented.

  The damper 29 opens according to the fluid pressure. When the fluid pressure decreases, the damper 29 closes due to its own weight. Therefore, the damper 29 can be reliably closed when the conditions for starting the opening are surely set and the fluid pressure decreases. Therefore, operational reliability can be ensured, and the configuration can be simplified and the cost can be reduced.

  Further, when the air volume control unit 17 of the control means 16 controls the air volume of the blower 6, the dampers 29 a and 29 b on the outside air passage 14 side and the cleaning tank inside air passage 15 side are not fully opened (shown in FIG. 6). In the state, that is, when the amount of air that the damper 29b on the side of the cleaning tank internal air passage 15 is not fully opened, the amount of air on the side of the external air passage 14 is larger than the amount of air on the side of the internal air passage 15 of the cleaning tank. The air volume control unit 17 of the control means 16 can realize a more reliable air volume distribution operation by controlling the air volume of the blower 6, and can achieve both cost reduction by simplification and improved operation reliability.

  Further, when the air volume control unit 17 of the control means 16 controls the air volume of the blower 6, the dampers 29 a and 29 b on the outside air passage 14 side and the cleaning tank inside air passage 15 side are not fully opened (shown in FIG. 6). In the state, that is, when the amount of air that the damper 29b on the cleaning tank internal air passage 15 side is not fully opened, the air amount on the outside air passage 14 side is larger than the air amount on the cleaning tank internal air passage 15 side, and the air amount is further increased. When the damper 29b on the side of the cleaning tank internal air passage 15 is fully opened during operation, the air volume on the side of the cleaning tank internal air passage 15 is made larger than the air volume on the side of the external air passage 14, thereby simplifying the air volume distribution unit. The air volume control unit 17 of the control means 16 can realize a more reliable air volume distribution operation by controlling the air volume of the blower 6, achieve both cost reduction by simplification and improved operation reliability, and further provide dampers 2 for both passages. When the air flow rate a and 29b are both fully open, the air flow rate on the washing tank internal air passage 15 side is increased and the drying performance is improved. Therefore, the air blower 6 has the capacity of the blower over the entire air flow range from a small air flow rate to a sufficiently large region. It can be used effectively and drying performance can be improved by expanding the air flow control range.

  Although the damper 29 is shown to be closed by its own weight, the damper 29 may be provided with a closing force by being biased by a spring or the like, and the degree of freedom of the mounting posture can be improved by the biasing force of the spring. Moreover, although the damper 29 showed the case where several sheets are arrange | positioned in each channel | path of the external air channel | path 14 and the washing tank inside air channel | path 15, it cannot be overemphasized that it is sufficient to form by one sheet | seat in each channel | path. Can be

  Moreover, although the damper 29 showed the case where changing the thickness which is a shape and changing own weight, it cannot be overemphasized that a weight may be provided or it may change into the material from which specific gravity differs.

  As described above, in the present embodiment, the air volume distribution means is provided with a damper whose opening degree changes depending on the air pressure of the blower in the cleaning tank internal air passage, so that the passage resistance can be reduced. Can be reduced in size and input.

  In addition, since the air volume distribution means of the present embodiment is provided with dampers whose opening degree changes depending on the wind pressure of the blower in both the outside air passage and the cleaning tank inside air passage, flow distribution according to the fluid pressure is made. Therefore, the structure can be simplified and the cost can be reduced.

In addition, the damper of the present embodiment sets the wind pressure at which opening starts to be lower on the outside air passage side than the washing tank inside air passage side, so that the wind on the outside air passage side from the washing tank inside air passage side at the start of drying Since the exhaust gas temperature can be gradually increased from the outside air temperature, the exhaust gas can be prevented from high temperature exhaust due to exhaust gas overshoot.

  In addition, the damper of the present embodiment has a structure in which the fulcrum is disposed above the center of gravity and is closed by its own weight, and the outside air passage side is lighter than the washing tank inside air passage side, so that the reliable closing can be achieved. In addition, a reliable setting of the conditions for starting the opening can be performed to ensure the reliability of the operation, and the configuration can be simplified and the cost can be reduced.

  Further, the control means of the present embodiment is set so that the damper on the air passage side of the cleaning tank is not fully opened at the start of the operation of the blower, and the air volume on the outside air passage side is made larger than the air volume on the cleaning tank internal air passage side As a result, a more reliable air volume distribution operation can be realized in a configuration in which the air volume distribution means is simplified, so that both cost reduction and improved operation reliability can be achieved.

  Further, the control means of the present embodiment is set to an air volume at which the damper on the washing tank internal air passage side is not fully opened at the start of the operation of the blower, and the air quantity on the outside air passage side is made larger than the air quantity on the washing tank internal air passage side, In addition, when the damper on the side of the cleaning tank internal air passage is fully opened during operation, the air volume on the side of the cleaning tank internal air passage is larger than the air volume on the side of the outside air passage. Since air volume distribution operation can be realized, both cost reduction by simplification and improvement of operation reliability can be achieved, and further, drying performance can be improved by expanding the air volume control width.

  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 air volume distribution means of the dishwasher Sectional drawing which shows the other state of the air volume distribution means of the dishwasher Sectional drawing of the air volume distribution means in Embodiment 2 of this invention Sectional drawing which shows the other state of the air volume distribution means of the dishwasher Sectional drawing which shows the other state of the air volume distribution means of the dishwasher Configuration of conventional dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cleaning tank 4 Cleaning means 5 Heating means 6 Blower 7 Exhaust port 9 Drying means 12 Air volume distribution means 13 Mixing part 14 Outside air path 15 Cleaning tank inside air path 16 Control means 20 Valve body part 29 Damper

Claims (5)

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, an exhaust port for discharging moisture inside the cleaning tank, and a drying means having a blower And a control means for controlling the drying means, the drying means is a mixing unit for mixing the outside air and the cleaning tank inside air arranged upstream of the exhaust port, and the mixing ratio of the outside air and the cleaning tank inside air An air flow distribution means for changing the flow rate, and during the drying operation, an air passage for operating the blower and introducing outside air to the mixing section by the air volume distribution means, and a cleaning tank communicating with the mixing section through the cleaning tank A dishwasher which diverts into an inside air passage and changes the air flow into the washing tank. The dishwasher according to claim 1, wherein the blower is disposed upstream of the air volume distribution means. The dishwasher / dryer according to claim 1 or 2, wherein the air volume distribution means includes a valve body section that changes an opening area of the outside air passage and the washing tank inside air passage. 4. The dishwasher according to claim 3, wherein the air volume distributing means is configured to increase the air volume to the outside air passage from the washing tank inside air passage when the drying operation is started. 4. The dishwasher according to claim 3, wherein the air volume distribution means closes the air passage in the washing tank during the washing operation or the rinsing operation.

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