JP4530085B2 - 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. 9 shows a conventional dishwasher described in Patent Document 1. In FIG. As shown in FIG. 9, 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-described 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 is discharged. 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 mixes a sufficient amount of outside air into the exhaust in the cleaning tank that flows out of the cleaning tank during the drying operation, thereby promoting a reduction in exhaust temperature and a reduction in the amount of moisture in the exhaust. An object of the present invention is to provide a dishwasher with enhanced exhaust comfort.

  In order to solve the above-described conventional problems, the dishwasher of the present invention includes a washing tank for storing an object to be cleaned, a cleaning means for cleaning the object to be cleaned, a heating means for heating cleaning water, and the inside of the cleaning tank. An exhaust port for discharging the moisture, an air blower for blowing the outside air, a mixing unit for mixing the outside air arranged on the upstream side of the exhaust port and the cleaning tank inside air, and an outside air passage for introducing the outside air into the mixing unit, A cleaning tank internal air passage communicating with the mixing section through the cleaning tank, and an air volume distribution means for changing a mixing ratio of the outside air and the cleaning tank internal air, and the air volume distribution means has an opening degree by wind pressure. A damper that changes is provided in the cleaning tank inside air passage and the outside air passage, and the damper connects a cleaning tank damper provided in the cleaning tank inside air passage and an outside air damper provided in the outside air passage, and When the opening of the damper increases, the outside air damper The opening of the cleaning tank is reduced, and the pressure receiving area of the cleaning tank damper is made larger than the pressure receiving area of the outside air damper so as to apply a return force in the direction of closing the cleaning tank internal air passage. As the amount of air from the blower is increased, the opening degree of the washing tank damper is increased, and the opening degree of the outside air damper is reduced, so that the air amount ratio between the outside air and the washing tank inside air is increased. It was made to change.

As a result, during the drying operation, a sufficient amount of outside air is mixed in the mixing section for cooling the air in the high-temperature and high-humidity cleaning tank (cleaning tank air), and the change in the air flow rate due to the operation of changing the opening of the damper At the same time, stable air volume distribution to the inside and outside air passages of the washing tank is performed, and it is possible to improve the stability of the exhaust temperature and to prevent the hot air feeling of the exhaust by cooling the exhaust and reducing the moisture and improving the drying performance. .

  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 cleaning the object to be cleaned, a heating means for heating cleaning water, an exhaust port for discharging moisture inside the cleaning tank, and an outside air And a mixing section that mixes the outside air arranged in the upstream side of the exhaust port and the cleaning tank inside air, an outside air passage that introduces the outside air into the mixing section, and the cleaning section that communicates with the mixing section. A cleaning tank internal air passage, and an air volume distribution means for changing a mixing ratio of the outside air and the cleaning tank internal air, wherein the air volume distribution means includes a damper whose opening degree is changed by a wind pressure and the cleaning tank internal air passage. The damper is provided in an outside air passage, and the damper is connected to a washing tank damper provided in the washing tank inside air passage and an outside air damper provided in the outside air passage. When the opening degree of the washing tank damper increases, the outside air damper opens. Configured to reduce the degree of The pressure receiving area of the cleaning tank damper is made larger than the pressure receiving area of the outside air damper so as to apply a return force in the direction of closing the cleaning tank internal air passage, and the air volume from the blower is increased. In addition, by increasing the opening degree of the washing tank damper and reducing the opening degree of the outside air damper, the air volume ratio between the outside air and the washing tank inside air is changed, so that the temperature is high during the drying operation. A sufficient amount of outside air is mixed in the mixing section for cooling the air in the high humidity washing tank (cleaning tank inside air), and the air flow between the washing tank internal air and the outside air are changed along with the change in the air flow rate by the opening change operation of the damper. Stable air volume distribution to the passages is performed, and it is possible to improve both the cooling of the exhaust gas and preventing the hot air feeling of the exhaust gas by reducing moisture and improving the drying performance and the stability of the exhaust temperature.

  In addition, it is possible to greatly change the air volume ratio in the mixing unit with the change in the air flow rate, increase the dry air flow rate without increasing the air blowing capacity of the air blower, and improve the drying performance. Electricity and cost can be reduced.

  In addition, by making the pressure receiving area of the cleaning tank damper larger than the pressure receiving area of the outside air damper, the difference in the force applied to open and close the damper can be clarified, and the damper can be operated in the pressure receiving direction of the cleaning tank damper. Even if the wind pressure is low, the opening degree of the washing tank damper can be set reliably, and the load on the blower can be reduced and the blower can be downsized.

  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 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 via 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 on the upstream side 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 on the upstream side 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 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. .

  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.

  Further, the air volume distribution means 12 distributes the air volume of the blower 6 to the outside air passage 14 and the cleaning tank internal air passage 15, as shown in FIG. 2, a damper whose opening degree changes with the wind pressure generated by the operation of the blower 6. 20 is provided so as to face the outside air passage 14 and the washing tank inside air passage 15, and the washing tank damper 20a provided on the washing tank inside air passage 15 side and the outside air damper 20b provided on the outside air passage 14 side are connected to each other. Are integrated as a connector 20c.

  The damper 20 is connected so that the opening degree of the outside air damper 20b decreases as the opening degree of the cleaning tank damper 20a increases, and a weight 20d is added to the washing tank damper 20a of the integrated damper 20. By making the support shaft 21 pivotable, the damper 20 has an air passage 15 in the washing tank by the action of gravity as shown in FIG. 2 when the wind pressure of the blower 6 is lower than a predetermined value or when the blower 6 is stopped. The side is substantially closed or closed, and the outside air passage 14 side is fully opened.

  The cleaning tank 1 is connected to 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 can be pulled out from the housing 26. It is stored in a slide body 27 that can be used. The slide body 27 is provided with a vent 28 communicating with the outside.

  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 and the cleaning performance is improved. 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, it is preferable to warm the object to be cleaned in the rinsing operation. If the rinsing operation is performed with high-temperature water of about 70 ° C. to 80 ° C., the sterilization treatment can be performed. it can. 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 rinsing operation is performed with high-temperature water, the air volume control unit 17 reduces the air volume of the blower 6 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 drying operation. The low air pressure is applied to the air volume distribution means 12 and the outside air passage 14 side is mainly ventilated so that the air volume ratio between the outside air and the cleaning tank air (outside air volume: cleaning tank air volume) is brought close to about 1: 0. The ventilation of the blower 6 is mainly used for cooling, and the exhaust path heated during the high-temperature rinsing operation is cooled so that hot air is not emitted from the exhaust port 7.

  Next, the amount of air blown from the blower 6 is slightly increased to increase the wind pressure applied to the damper 20 of the air volume distribution means 12, and the cleaning tank damper 20a is slightly opened as shown in FIG. 3 is distributed to flow a little wind (indicated by a black arrow in FIG. 3) and most of the wind (indicated by a white arrow in FIG. 3) on the outside air passage 14 side, and the mixing section 13 has an air passage in the cleaning tank. The high-temperature, high-humidity wind pushed out from the washing tank 1 by the wind entering the 15 side is mixed and cooled with a large amount of wind entering the outside air passage 14 side, and the low-temperature wind is discharged from the exhaust port 7. Let

  As the drying operation proceeds, the humidity of the cleaning tank air decreases due to the inflow of outside air into the cleaning tank 1, and the enthalpy of the cleaning tank air decreases, so the temperature of the exhaust gas flowing out from the exhaust port 7 is below a predetermined value. The amount of outside air required for cooling 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, the air entering the cleaning tank internal air passage 15 with the operation of the blower 6 further increases the amount of air blown from the blower 6 as the humidity or temperature in the cleaning tank 1 decreases, thereby increasing the opening of the cleaning tank damper 20a. Then, by reducing the opening degree on the outside air passage 14 side by the outside air damper 20b connected and integrated with the washing tank damper 20a, the air volume ratio between the outside air and the washing tank inside air is changed, and the washing tank inside air passage 15 is changed. Drying is promoted by increasing the air volume ratio to the side.

  For this reason, the mixing unit 13 mixes the outside air into the cleaning tank inside air and promotes cooling by changing the air volume distribution, thereby reliably preventing the hot air feeling of the exhaust temperature and the condensation generated during the cooling of the cleaning tank air. It is possible to improve the comfort by reducing the humidity increase in the installed room and the like by reducing the moisture in the interior, and by making the air volume distribution variable, it is possible to both prevent high-temperature exhaust and ensure the drying performance.

  Moreover, since the damper 20 is connected so that the opening degree of the outside air damper 20b is reduced when the opening degree of the cleaning tank damper 20a is increased, the air volume ratio in the mixing unit 13 is changed along with the change in the air volume of the blower 6. Can be greatly changed, and the drying capacity can be improved by increasing the amount of dry air with the small capacity of the blower 6 without increasing the blowing capacity of the blower 6, and the fan can be reduced in size, power consumption and cost. .

  Further, the damper 20 is returned to the initial position by gravity when the blower 6 stops blowing, so that the configuration can be simplified and the cost can be reduced.

  Further, by applying a return force to the damper 20 by an urging body (not shown) such as a spring and returning to the initial position by the urging body (not shown) when the blower 6 stops blowing, And the return force can be clearly set, the opening position of the damper 20 can be set reliably, the reliability of the operation can be ensured, and the degree of freedom of the installation posture of the air volume distribution means 12 can be increased.

  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.

FIG. 4 shows another embodiment of the damper 20. The damper 20 is connected in such a manner that the washing tank damper 20 a and the outside air damper 20 b are closed when the blower 6 stops blowing.

  Further, the damper 20 has a different shape of the pressure receiving portion 29 that is a surface where the upstream flow of the cleaning tank damper 20a and the outside air damper 20b collides, and the pressure receiving portion 29 of the cleaning tank damper 20a has an upstream side. A concave surface portion 30 is provided to make it easier to receive the flow pressure than the outside air damper 20b. A convex surface portion 31 is provided on the pressure receiving portion 29 of the outside air damper 20b toward the upstream side to receive pressure from the washing tank damper 20a. It is difficult.

  Next, the operation and action of the damper 20 of the air volume distribution means 12 configured as described above will be described.

When the air blown by the start of the operation of the blower 6 hits the damper 20, the washing tank damper 20a in which the pressure receiving portion 29 becomes the concave surface portion 30 toward the upstream side is easy to receive fluid flow force, and the pressure receiving portion 29 is on the upstream side. the outside air damper 20b that is a convex portion 31 toward the less likely receiving a flow force of the fluid, the damper 20 is rotated counterclockwise to the support shaft 21 as the center of rotation, the flow as shown in FIG. 5 The opening degree is set at a balance position between the physical strength and the return force by the weight 20d of the washing tank damper 20a.

Air volume distribution to the outside air passage 14 and the cleaning tank inside air passage 15 is performed by providing a throttle portion (not shown) having a reduced cross-sectional area on the side of the outside air passage 14 and setting the passage resistance to be large so that the amount of air blown from the blower 6 is increased. When the damper 20 is small and the opening degree of the damper 20 is small, there is no influence of the passage resistance on the outside air passage 14 side, and the air volume distribution is determined by the passage resistance of the damper 20 portion. As shown in FIG. 5 by the white arrow on the outside air passage 14 side and the black arrow on the washing tank inside air passage 15 side, the flow rate on the outside air passage 14 side is reduced. Stable air volume distribution is performed mainly by reducing the temperature of the exhaust gas flowing out from the exhaust port 7 in a state where the air volume becomes larger than the air volume on the side of the inside air passage 15.

  As the air volume of the blower 6 is further increased from this state, the opening degree of the damper 20 increases, and the air volume flowing to the outside air passage 14 side is affected by the passage resistance of a throttle portion (not shown) whose sectional area is reduced. The increase in the air volume peaked out, the increase in the air volume on the cleaning tank internal air passage 15 side exceeded the outside air passage 14 side, and the air volume ratio between the external air passage 14 side and the cleaning tank internal air passage 15 side was larger on the cleaning tank internal air passage 15 side. In this state, a stable air volume distribution based on drying is performed.

  Here, the damper 20 is connected in such a manner that when the operation of the blower 6 is stopped, the washing tank damper 20a and the outside air damper 20b close the passages of the washing tank inside air passage 15 and the outside air passage 14, so that the inside of the washing tank 1 when the equipment is stopped is used. As a result, the moisture flows back through the air passage to the air blower 6 and leaks to prevent corrosion due to dew condensation inside the equipment, thereby improving the reliability of the equipment.

Moreover, since the shape of the pressure receiving part 29 of the washing tank damper 20a and the outside air damper 20b is different, the damper 20 is opened and closed even when the pressure receiving areas of the washing tank damper 20a and the outside air damper 20b of the damper 20 are close to each other. Therefore, the difference in the applied force is clarified to stabilize the rotational force with respect to the support shaft 21 and a reliable opening operation is performed, and the reliability of the exhaust temperature cooling operation and the drying operation can be improved.

  Further, the concave portion 30 is provided on the pressure receiving portion 29 of the cleaning tank damper 20a toward the upstream side to make it easier to receive pressure than the outside air damper 20b, so that even if the pressure receiving area of the cleaning tank damper 20a is reduced, the cleaning tank damper 20a. Can be ensured, and the opening operation of the damper 20 as a whole can be ensured. Therefore, it is possible to promote the downsizing of the damper 20 by reducing the pressure receiving area.

  In addition, since the pressure receiving portion 29 of the outside air damper 20b is provided with a convex surface portion 31 toward the upstream side so that the pressure is less likely to be received than the cleaning bath damper 20a, the opening setting force of the cleaning bath damper 20a is secured and the damper 20 as a whole. Therefore, the passage resistance in the outside air damper 20b is reduced, and the blower 6 can be downsized.

  Furthermore, the pressure receiving portion 29 of the cleaning tank damper 20a is provided with the concave surface portion 30 toward the upstream side, and the pressure receiving portion 29 of the outside air damper 20b is provided with the convex surface portion 31 toward the upstream side, whereby the air volume distribution operation of the damper 20 is performed. As a result, the stability of the exhaust temperature can be improved and the blower load can be reduced by reducing the size of the damper 20 and reducing the flow resistance of the ventilation path, thereby reducing the size and cost of the blower 6.

  In the case where the pressure receiving areas of the pressure receiving portions 29 of the washing tank damper 20a and the outside air damper 20b shown so far are substantially the same, the outside air passage 14 side and the washing tank inside air passage 15 side are both ventilation passages having a large cross-sectional area. Setting is possible, and the flow resistance in the ventilation path can be reduced to reduce the size of the blower.

  Further, by making the pressure receiving area of the washing tank damper 20a larger than the pressure receiving area of the outside air damper 20b, the difference between the forces of the washing tank damper 20a and the outside air damper 20b applied to open and close the damper 20 is clarified, and the washing tank The damper 20 can be operated in the pressure receiving direction of the damper 20a, and the opening degree of the washing tank damper 20a can be reliably set even at a low wind pressure, and the load on the blower 6 can be reduced and the blower 6 can be downsized.

  Needless to say, the cleaning tank damper 20a and the outside air damper 20b may be individually produced and connected to each other, or may be integrally formed from the beginning with a resin or the like.

  Moreover, although the case where the washing tank damper 20a and the outside air damper 20b share the same support shaft 21 is shown, the washing tank damper 20a and the outside air damper 20b are provided with individual support shafts (not shown), respectively, and the washing tank It goes without saying that a connecting portion (not shown) for connecting the damper 20a and the outside air damper 20b may be provided and integrated.

  Further, the air volume control of the blower 6 during the drying operation can be performed by changing the air volume of the blower 6 according to the elapsed time of the drying operation, regardless of the temperature detected by the control temperature detector 18, and the temperature detector 18. Needless to say, the cost can be reduced by omitting.

As described above, in the present embodiment, the air volume distribution means is provided with dampers whose opening degree changes depending on the wind pressure in the cleaning tank inside air passage and the outside air passage, and the damper is provided in the cleaning tank inside air passage. The cleaning tank damper provided is connected to the outside air damper provided in the outside air passage, and the opening degree of the outside air damper is reduced when the opening degree of the cleaning tank damper is increased. The area is made larger than the pressure receiving area of the outside air damper so as to apply a return force in the direction of closing the air passage in the washing tank, and the amount of air from the blower is increased. By increasing the opening degree of the damper and reducing the opening degree of the outside air damper, the air volume ratio between the outside air and the washing tank inside air is changed. A sufficient amount of outside air is mixed in the mixing section for cooling the high-temperature and high-humidity cleaning tank air (cleaning tank internal air). Stable air volume distribution to the outside air passage is performed, and it is possible to improve both the cooling of the exhaust gas and preventing the hot air feeling of the exhaust gas by reducing moisture and improving the drying performance and the stability of the exhaust temperature.

  In addition, it is possible to greatly change the air volume ratio in the mixing unit with the change in the air flow rate, increase the dry air flow rate without increasing the air blowing capacity of the air blower, and improve the drying performance. Electricity and cost can be reduced.

  In addition, by making the pressure receiving area of the cleaning tank damper larger than the pressure receiving area of the outside air damper, the difference in the force applied to open and close the damper can be clarified, and the damper can be operated in the pressure receiving direction of the cleaning tank damper. Even if the wind pressure is low, the opening degree of the washing tank damper can be set reliably, and the load on the blower can be reduced and the blower can be downsized.

(Embodiment 2)
FIG. 6 is a configuration diagram of the damper according to the second embodiment of the present invention.

  In FIG. 6, the same members and the same functions as those of the embodiment of FIGS. 1 to 5 are denoted by the same reference numerals, detailed description thereof will be omitted, and different points will be mainly described.

  The damper 20 is provided with posture setting means 32 that can change the connecting posture of the cleaning tank damper 20a and the outside air damper 20b, and the relative position of the damper 20 by changing the connecting angle α between the cleaning tank damper 20a and the outside air damper 20b. To be able to fluctuate.

  The posture setting means 32 uses a shape memory 33 that changes the shape according to the temperature in order to change the connection posture according to the temperature of the cleaning tank 1, and the support shaft 21 of the damper 20 has excellent thermal conductivity. It is attached to a wall surface (not shown) forming the cleaning tank 1 as a material such as copper or stainless steel, the cylindrical surface of the support shaft 21 is used as a heat transfer section 34 for transmitting the temperature of the cleaning tank, and one end is connected to the cleaning tank damper 20a. The intermediate portion of the shape memory 33 having the other end connected to the outside air damper 20b is disposed around the heat transfer section 34 in a heat transfer relationship.

  Here, the cleaning tank damper 20a and the outside air damper 20b are connected like a hinge via the support shaft 21, and the connection angle is determined by the shape memory 33 as the posture setting means 32 to determine the relative position.

  The shape memory 33 can be connected to the cleaning tank damper 20a and the outside air damper 20b by various methods such as adhesion, welding, engagement or caulking.

  Next, the operation and action of the damper 20 of the air volume distribution means 12 configured as described above will be described with reference to FIG.

  In order to prevent the high temperature and high humidity air in the washing tank 1 from being discharged from the exhaust port 7 in the drying operation, at the start of the drying operation, the air volume of the blower 6 is reduced and a low wind pressure is applied to the air volume distribution means 12 to thereby let the outside air passage 14 The air volume ratio between the outside air and the cleaning tank air (outside air volume: the amount of cleaning tank air) is increased on the outside air side. At this time, as the temperature at the time of rinsing is set higher (for example, 80 ° C.), the cleaning tank 1 becomes hot and humid. Therefore, it is necessary to increase the air volume ratio of the outside air at the start of the drying operation. When the temperature at the time of rinsing is reduced (for example, 60 ° C.), at the start of the drying operation, the air volume of the blower 6 is increased by reducing the air volume ratio of the outside air to increase the drying air volume to the cleaning tank 1 and thereby increasing the drying property. Can be used effectively.

  Therefore, the temperature of the cleaning tank 1 is transmitted to the shape memory 33 via the support shaft 21 of the damper 20, and the connection angle α between the cleaning tank damper 20a and the outside air damper 20b is changed.

  That is, when the temperature of the cleaning tank 1 is high, the opening angle θ on the side of the outside air passage 14 by the outside air damper 20b is increased by reducing the connection angle α, and the amount of air flowing to the side of the outside air passage 14 is increased. Further, when the temperature of the cleaning tank 1 is low, the opening angle θ on the side of the outside air passage 14 by the outside air damper 20b is reduced by increasing the connection angle α, and the amount of air flowing to the side of the outside air passage 14 is reduced.

  In FIG. 7, the cleaning tank damper 20a is slightly opened by the wind pressure of the blower 6. Even when the opening degree of the cleaning tank damper 20a is the same, when the temperature of the cleaning tank 1 is high, the connection angle α is small, so the outside air damper 20b The opening angle θ is increased to increase the exhaust temperature reducing action, and when the temperature of the cleaning tank 1 is lowered, the connection angle α is increased and the opening angle θ of the outside air damper 20b is reduced to relax the exhaust temperature reducing action. By increasing the air volume ratio to the cleaning tank internal air passage 15 side and improving the drying property, the control range of the temperature reduction of the exhaust temperature is expanded.

  Further, the fluctuation of the coupling angle α of the damper 20 is changed not only in the initial state at the start of the drying operation but also in response to the temperature drop of the cleaning tank 1 as the drying operation proceeds, so that hot air is blown from the exhaust port 7. By performing the operation to increase the drying property by distributing the air volume as much as possible to the cleaning tank internal air passage 15 side so as not to come out, both the control range expansion of the exhaust gas temperature and the improvement of the drying property are achieved.

  Thus, since the damper 20 is provided with the attitude setting means 32 that can change the coupling attitude of the coupling body 20c of the cleaning tank damper 20a and the outside air damper 20b, the temperature of the cleaning tank 1 is high to low. Since the temperature can be lowered correspondingly, the control range of the exhaust temperature can be expanded, and it is possible to select a setting mainly for lowering the exhaust temperature or a setting mainly for improving the drying property. Convenience can be improved.

  Further, since the posture setting means 32 changes the connection posture in accordance with the temperature of the cleaning tank 1, the exhaust gas temperature can be reliably reduced by setting the air volume distribution ratio according to the temperature in the cleaning tank 1. Low temperature can be promoted.

  Further, the posture setting means 32 can be simplified in structure and cost reduced by being formed by the shape memory 33 that changes its shape according to the temperature.

  Further, the posture setting means 32 arranges a heat transfer section 34 for transmitting the temperature of the cleaning tank 1 provided on the support shaft 21 of the damper 20 and a shape memory 33 connected to the cleaning tank damper 20a and the outside air damper 20b in a heat transfer relationship. Therefore, the posture of the damper 20 is reliably set according to the temperature of the cleaning tank 1 by the shape memory 33, and the reliability of the operation for reducing the exhaust temperature can be improved.

  Although the case where the connection angle α of the damper 20 is changed by the shape memory 33 as the posture setting means 32 is shown here, the cleaning tank damper 20a and the outside air damper 20b are used as the support shaft 21 without using the shape memory 33. It is also possible to set it by manually moving the coupling angle α by attaching it to the press fit, and connecting the washing tank damper 20a and the outside air damper 20b through a ratchet-shaped multi-step (not shown). It is also possible to manually set the angle α. Needless to say, an actuator (not shown) such as a motor for moving the connection angle α between the cleaning tank damper 20a and the outside air damper 20b is provided, and the connection angle α can be controlled according to the temperature of the cleaning tank 1.

Further, as shown in FIG. 7, the wind is directed upward from the blower 6, and the outside air passage 14 and the cleaning tank inside air passage 15 are arranged in a vertical branch portion 35 that branches in a substantially vertical direction, and the support shaft 21 of the damper 20 is arranged. Is provided in the substantially vertical direction of the vertical branch portion 35, the return operation by the gravity of the damper 20 can be stabilized, the reliability of the return operation of the damper when the air flow rate is reduced can be improved, and the operation reliability can be improved.

  FIG. 8 shows another embodiment of the air volume distribution means 12. In FIG. 8, the outside air passage 14 and the cleaning tank inside air passage 15 are arranged in a horizontal branch portion 36 that branches substantially horizontally, and the washing tank inside air passage 15 is arranged below the outside air passage 14, and the support shaft of the damper 20 is arranged. 21 is provided in a substantially horizontal direction of the horizontal branch portion 36, the air volume of the blower 6 is increased, the opening degree of the cleaning tank damper 20a on the cleaning tank internal air passage 15 side is increased, and the cleaning tank internal air passage 15 side is increased. The air volume (indicated by a white arrow in the figure) is larger than the air volume on the outside air passage 14 side (indicated by a black arrow in the figure), and the apparatus is operating mainly with drying. When the blower 6 is stopped from this state and the drying operation is finished, even if the damper 20 does not have a weight 20d, the rotating force in the clockwise direction in the drawing works by the dead weight of the washing tank damper 20a and the outside air damper 20b, and the washing tank internal air passage The 15th washing tank damper 20a returns to the closed state.

  Thus, even if the damper 20 is disposed in the horizontal branch portion 36 that branches into the cleaning tank inside air passage 15 and the outside air passage 14 in the substantially horizontal direction, the support shaft 21 of the damper 20 is in the substantially horizontal direction. Even with a simple configuration in which the weight is returned by its own weight, the reliability of the return operation of the damper 20 when the air flow rate is reduced can be increased, and the operation reliability can be improved.

  Further, by disposing the cleaning tank inside air passage 15 below the outside air passage 14, the damper 20 can be restored by its own weight, so that the cost can be reduced by simplifying the configuration.

  Although FIG. 8 shows an example in which the outside air passage 14 and the cleaning tank inside air passage 15 are arranged in the vertical direction, it goes without saying that they can be arranged in the front-rear direction of the paper surface of FIG.

  As described above, in the present embodiment, the damper is provided with posture setting means that can change the coupling posture of the cleaning tank damper and the outside air damper, so that the control range of the exhaust temperature can be expanded, and the exhaust temperature can be controlled. It is possible to select a setting mainly for lowering the temperature or a setting mainly for improving the drying property, and it is possible to improve convenience and improve convenience.

  In addition, the attitude setting means of the present embodiment can reduce the exhaust gas temperature by setting the air volume distribution ratio according to the temperature in the cleaning tank by changing the connection attitude according to the temperature of the cleaning tank, The temperature of exhaust can be lowered.

  Further, the posture setting means of the present embodiment includes a shape memory that changes its shape according to the temperature, thereby simplifying the configuration and reducing the cost.

  In addition, the posture setting means of the present embodiment is such that the heat transfer section that conveys the temperature of the cleaning tank provided on the support shaft of the damper and the shape memory that is connected to the cleaning tank damper and the outside air damper are arranged in a heat transfer relationship. The shape memory can reliably set the posture of the damper according to the temperature of the cleaning tank, and the reliability of the operation for reducing the exhaust temperature can be improved.

  Further, the damper according to the present embodiment is arranged in the vertical branch portion that branches into the cleaning tank inside air passage and the outside air passage in the substantially vertical direction, and the support shaft of the damper is provided in the substantially vertical direction of the vertical branch portion. The reliability of the return operation of the damper when the air flow is reduced can be improved, and the operation reliability can be improved.

Further, the damper according to the present embodiment is arranged in the horizontal branch portion that branches into the cleaning tank inside air passage and the outside air passage in the substantially horizontal direction, and the damper support shaft is provided in the substantially horizontal direction of the horizontal branch portion. The reliability of the return operation of the damper when the air flow is reduced can be improved, and the operation reliability can be improved.

  Moreover, since the horizontal branch part of this Embodiment can be set as the structure which resets a damper by dead weight by arrange | positioning a washing tank inside air path below the outside air path, it can reduce cost by simplification of a structure.

  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. Sectional drawing which shows the other state of the air volume distribution means in FIG. Sectional drawing which shows the other structure of the damper in the air volume distribution means in FIG. Sectional drawing which shows the other state of the air volume distribution means in FIG. External appearance perspective view of the damper in Embodiment 2 of this invention Sectional drawing of the air volume distribution means in Embodiment 2 of this invention Sectional drawing of the other structure of the air volume distribution means in Embodiment 2 of this invention Configuration of conventional dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing 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 Washing tank inside air path 20 Damper 20a Washing tank damper 20b Outside air damper 21 Support shaft 29 Pressure receiving part 30 Concave surface Section 31 Convex section 32 Attitude setting means 33 Shape memory 34 Heat transfer section 35 Vertical branch section 36 Horizontal branch section

Claims (1)

A cleaning tank for storing the object to be cleaned, a cleaning means for cleaning the object to be cleaned, a heating means for heating the cleaning water, an exhaust port for discharging moisture inside the cleaning tank, a blower for blowing outside air, and the exhaust A mixing section that mixes the outside air and the cleaning tank inside air arranged upstream of the mouth, an outside air passage that introduces the outside air into the mixing section, and a cleaning tank inside air passage that communicates with the mixing section through the cleaning tank; Air volume distribution means for changing the mixing ratio of the outside air and the cleaning tank internal air, the air volume distribution means is provided with a damper whose opening degree is changed by wind pressure in the cleaning tank internal air passage and the external air passage, The damper connects the cleaning tank damper provided in the cleaning tank internal air passage and the outside air damper provided in the outside air passage so that the opening degree of the outside air damper decreases when the opening degree of the cleaning tank damper increases. The cleaning tank damper The pressure receiving area of the outside air damper is made larger than the pressure receiving area of the outside air damper so as to apply a return force in the direction of closing the cleaning tank internal air passage, and as the air volume from the blower is increased, A dishwasher which increases the opening degree of the washing tank damper and reduces the opening degree of the outside air damper to change the air volume ratio between the outside air and the washing tank inside air.

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