JP5023782B2 - 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 means 4 having a cleaning nozzle 2 for injecting 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-mentioned conventional problems, and mixes and cools a necessary and sufficient amount of outside air even when the air in the cleaning tank (air in the cleaning tank) is hot and humid during the drying operation, Furthermore, it aims at providing the dishwasher which improved the comfort of exhaust_gas | exhaustion, ensuring the ventilation volume to a washing tank, and not sacrificing the drying property of tableware.

In order to solve the above-described conventional problems, the dishwasher of the present invention includes a washing tank that stores an object to be cleaned, a cleaning unit that jets and circulates cleaning water to the object to be cleaned, and a heating unit that heats the cleaning water. , An exhaust port for discharging moisture inside the cleaning tank, a blower, and a mixing unit arranged on the upstream side of the exhaust port for mixing and cooling the outside air flowing from outside the machine body into the cleaning tank internal air flowing out from the cleaning tank And a control means for controlling the drying means, the drying means having air volume distribution means for changing the mixing ratio of the cleaning tank inside air and the outside air provided on the upstream side of the mixing section. The air flow distribution means includes a damper whose opening degree changes according to the wind pressure of the blower, and the damper makes the weight of the air in the cleaning tank heavier than the weight of the outside air, and the control means , the mixed drying operation start initial It is obtained by increasing the air volume ratio of outside air relative to the cleaning tank gas with less distribution to increasing the dispensed cleaning tank air flow rate of outside air air volume at.

As a result, during the drying operation, the outside air outside the machine is mixed with the high-temperature, high-humidity cleaning tank inside air to reduce the exhaust temperature, and air moisture condensation is generated by cooling by outside air mixing. The feeling of hot air can be surely prevented by the exhaust gas with reduced temperature and humidity.
In addition, it has air volume distribution means that changes the mixing ratio of the cleaning tank inside air and outside air provided on the upstream side of the mixing section, and by using one fan, drying and exhaust cooling can be shared by one fan. It is possible to reduce the size and cost by simplifying the configuration, and to save power by sharing. Further, since the air volume distribution means includes a damper whose opening degree changes depending on the wind pressure of the blower, the flow volume distribution according to the fluid pressure is performed, so that the configuration can be simplified and the cost can be reduced. In addition, the damper makes the dead weight on the air side of the washing tank heavier than the weight on the outside air side, so that at the start of the drying operation, the wind on the outside air passage side starts to flow before the washing tank inside air passage side, and the exhaust temperature Gradually increases from the outside air temperature to prevent high temperature exhaust due to exhaust temperature overshoot.

  The dishwasher of the present invention can reliably prevent the feeling of hot air due to the exhaust gas 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 unit that is disposed upstream of the blower and the exhaust port and has a mixing unit that mixes and cools the outside air introduced from the outside of the machine body with the inside air of the washing tank that has flowed out of the washing tank, and controls the drying means Control means, and the drying means has air volume distribution means for changing the mixing ratio of the cleaning tank inside air and the outside air provided on the upstream side of the mixing section, the air blower is one, and the air volume distribution means. Is provided with a damper whose opening degree changes depending on the wind pressure of the blower, the damper makes the weight of the washing tank inside air side heavier than the outside air side weight, and the control means in the mixing unit at the beginning of the drying operation Increased distribution to outside air volume and air volume inside washing tank Distributing by the large air volume ratio of the outside air for less then the cleaning tank mind of, during the drying operation by the outside air necessary and sufficient amount to the air (air inside the cleaning tank) in the cleaning tank of the high-temperature and high-humidity Mixing for cooling, reducing the temperature of the exhaust and reducing the moisture in the air by condensation, the hot air feeling can be reliably prevented by the exhaust with reduced temperature and humidity.
In addition, it has air volume distribution means that changes the mixing ratio of the cleaning tank inside air and outside air provided on the upstream side of the mixing section, and by using one fan, drying and exhaust cooling can be shared by one fan. It is possible to reduce the size and cost by simplifying the configuration, and to save power by sharing. Further, since the air volume distribution means includes a damper whose opening degree changes depending on the wind pressure of the blower, the flow volume distribution according to the fluid pressure is performed, so that the configuration can be simplified and the cost can be reduced. In addition, the damper makes the dead weight on the air side of the washing tank heavier than the weight on the outside air side, so that at the start of the drying operation, the wind on the outside air passage side starts to flow before the washing tank inside air passage side, and the exhaust temperature Gradually increases from the outside air temperature to prevent high temperature exhaust due to exhaust temperature overshoot.
In the second aspect of the invention, in particular, the control means of the first aspect of the invention sets the air volume ratio of the outside air to the cleaning tank inside air in the mixing section at 2 or more at the beginning of the drying operation.

According to a third aspect of the invention, in particular, the control means of the first or second aspect of the present invention reduces the air volume ratio of the outside air to the washing tank air to 1 or less with the progress of the drying operation, so that the washing tank internal temperature is high and high. In addition to reducing the temperature and humidity of the exhaust air mixed with a sufficient amount of outside air at the beginning of the wet drying operation, the air flow to the cleaning tank is cooled when the humidity in the cleaning tank decreases due to the progress of the drying operation. Exhaust air temperature can be reduced and drying can be accelerated by increasing the amount of outdoor air flow for use, and both the prevention of exhaust air hot air feeling and improvement in drying performance can be achieved.

According to a fourth aspect of the invention, in particular, the control means of any one of the first to third aspects includes a cleaning tank temperature detecting means for detecting the temperature of the cleaning tank, and an initial stage of the drying operation is started according to the temperature of the cleaning tank. By changing the air volume ratio of the outside air to the cleaning tank air, setting the air volume ratio of the outside air that is necessary and sufficient for cooling according to the temperature of the cleaning tank ensures reliable drying of tableware or shortening the drying time, etc. In addition to improving the drying property, it is possible to save energy by reducing the electric input consumed by the blower by effectively utilizing the blower of the blower for drying.

A fifth invention is, in particular, the first to third control means of any one of the present invention is provided with an outside air temperature detecting means for detecting the cleaning tank temperature sensing means and the ambient temperature for detecting the temperature of the cleaning tank By changing the air volume ratio of the outside air to the washing tank air at the beginning of the drying operation according to the temperature of the washing tank and the temperature of the outside air, the outside air volume required for cooling according to the temperature of the washing tank and the outside air temperature The ratio can be set with high accuracy, and the drying performance can be further improved, such as reliable drying of tableware or shortening of the drying time, and the electric input consumed by the blower can be reduced by shortening the time required for drying. Further energy savings can be achieved.

In the sixth aspect of the invention, in particular, when the temperature of the washing tank is high, the control means of the fourth or fifth aspect of the invention increases the air volume ratio of the outside air with respect to the washing tank air at the beginning of the drying operation. When the temperature of the washing tank is low, increasing the air volume to the washing tank by reducing the air volume ratio of the outside air can improve drying performance and save energy by promoting drying and shortening the drying time. When the temperature is high, the air volume ratio can be increased to increase the outside air for cooling and the exhaust temperature can be reliably reduced to a predetermined value, thereby improving the reliability of exhaust temperature reduction.

In the seventh invention, in particular, the control means of the fifth or sixth invention increases the air volume ratio of the outside air to the cleaning tank air at the beginning of the drying operation when the temperature of the outside air is high. When the temperature of the air is low, increasing the air volume to the washing tank by reducing the air volume ratio can improve drying performance and save energy by promoting drying and shortening the drying time, and when the temperature of the outside air at the start of drying is high The reliability of exhaust temperature reduction can be improved by increasing the air volume ratio to increase the outside air for cooling and reliably reducing the exhaust temperature to a predetermined value.

  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 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 includes a blower 6 that blows outside air that has flowed in from outside the machine body in order to discharge moisture in the washing tank 1 and dry the inside of the washing tank 1, and an exhaust port 7 that discharges moisture in the washing tank 1. The cleaning tank 1 is provided with an inlet 10 through which outside air flows in, and an outlet 11 through which air in the cleaning tank 1 (air inside the cleaning tank) is discharged is provided above the inlet 10.

  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. By arranging the cleaning tank internal air passage 15 that communicates with the mixing unit 13 via the cleaning tank 1 and the outlet 11, the blower 6 can be integrated into one. 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, one 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 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 a that detects the temperature of the cleaning tank 1, and the mixing section 13. A temperature control unit 19 is provided that sets a control amount based on the detected temperature of the exhaust temperature detection unit 18b or the outside air temperature detection unit 18c that detects the temperature of the outside air.

  The air volume distributing means 12 distributes the air volume by providing a valve body section 20 for changing the opening area to the outside air passage 14 and the cleaning tank internal air path 15. Accordingly, an opening control unit 21 that controls the opening of the valve body 20 is provided.

  Thus, the drying means 9 includes 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 ratio of the outside air and the cleaning tank inside air. The air volume distribution means 12 which changes 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 hole 28 that communicates with the outside and allows outside air outside the machine body to pass through.

  FIG. 2 is a control diagram of air volume distribution in the first embodiment shown in FIG. 1, and the air flow rate Qh (indicated by the solid line in the drawing) and the outside air flow rate Qc (indicated by the alternate long and short dash line in the figure) according to the air volume of the blower 6 ) And the air flow ratio R (shown by broken lines in the figure), and the blowing rate is increased from the blowing rate Qs in the initial stage of the drying operation as the drying operation proceeds. The air volume ratio Ra is reduced from the air volume ratio Rs at the initial stage of the drying operation to the air volume ratio Ra at the middle stage of the drying operation, and further, the air volume ratio Ra is increased from the air volume Qa at the middle stage of the drying operation to the air volume Qb at the latter stage of the drying operation. The air volume ratio is further reduced from the air volume ratio Rb to the late stage of the drying operation, and a control region is provided in which the air volume ratio of the outside air to the cleaning tank internal air in the mixing unit 13 is reduced as the air volume of the blower 6 is increased.

  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 the detergent and dirt clean and drain. This rinse operation is repeated several times to remove detergent or dirt. In the final rinsing operation, it is preferable that the object to be cleaned is warmed for drying operation to dry the object to be cleaned after the rinsing operation, and the rinsing operation is performed with high-temperature water of about 70 ° C to 80 ° C. Perform high temperature and sterilization. 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 to dry the object to be cleaned, but the air in the cleaning tank 1 (cleaning tank air) that has become hot and humid due to the rinsing operation does not directly blow out from the exhaust port 7. As described above, the air blown by the blower 6 is diverted to the outside air passage 14 and the washing tank inside air passage 15 by the air volume distribution means 12, and the outside air is sent not only to the washing tank 1 but also to the mixing unit 13. The amount of water discharged from the exhaust port 7 is reduced by cooling the room temperature with outside air at room temperature to lower the temperature and further removing moisture condensed by condensation. Here, since the air is blown by one blower 6, it is possible to reduce the size and cost by simplifying the configuration, and to save power by sharing drying and exhaust cooling, and the outside air passage 14 or the washing tank inside air passage 15 can be saved. No back flow occurs.

  As the drying operation progresses, the humidity of the cleaning tank internal air decreases due to the outside air flowing into the cleaning tank 1, and the enthalpy of the cleaning tank internal air decreases, so that the temperature of the exhaust gas flowing out from the exhaust port 7 becomes a predetermined value or less. 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.

  In order to lower the temperature of the exhaust gas, when the operation of the blower 6 is started, the air volume control unit 17 and the opening degree control unit 21 of the control means 16 cause the air volume to the outside air passage 14 side to be larger than the air volume to the cleaning tank inside air passage 15 side. The opening amount is controlled by driving the air flow rate of the blower 6 and the opening area of the valve body 20 of the air flow distribution means 12 with a stepping motor (not shown) or the like so as to increase, and the cleaning tank internal air passage 15 side In order to increase the air volume ratio, the ratio of the outside air volume to the air volume and the cleaning tank air (outside air volume / cleaning tank air volume) is controlled as shown in FIG.

  In FIG. 2, at the start of the drying operation when the inside of the cleaning tank 1 is in a high temperature and high humidity state or at the initial stage of the drying operation, the air volume Qs of the blower 6 is decreased and the distribution to the outside air volume Qc is increased to the air volume Qh in the cleaning tank. The air volume ratio R is increased to Rs by reducing the distribution of the air flow rate. Here, the air flow rate R at the start of the drying operation or at the initial stage of the drying operation is set near the air volume ratio R so that the air outlet 7 The hot air feeling is prevented by keeping the blown air speed at the bottom small.

  In the middle of the drying operation when the inside of the washing tank 1 is in a high temperature and humidity state due to the progress of the drying operation, the air flow rate of the blower 6 is increased from Qa and the air flow rate Qs at the initial stage of the drying operation, and the air volume ratio R is set. The air volume ratio Rs is reduced so that the outside air volume Qc and the cleaning tank air volume Qh are substantially equal to each other, and the amount of air blown to the cleaning tank 1 is increased to achieve both drying promotion and exhaust temperature reduction.

  Further, in the latter stage of the drying operation in which the drying operation has progressed and the inside of the washing tank 1 is in a high temperature and low humidity state, the amount of heat for cooling can be reduced by drastically reducing the humidity in the washing tank 1 and slightly lowering the temperature. The amount of air blown by the blower 6 is further increased to Qb, the outside air flow rate Qc is reduced, and the air flow ratio is reduced from Ra to 1 or less Rb by the distribution in which the air flow rate Qh in the washing tank is further increased, thereby promoting drying. A dry priority sealing area Qd for performing the main operation is provided in the control area. For this reason, the increase in the air flow rate Qb of the blower 6 and the majority of the air flow rate Qb are directed to the air flow rate Qh in the washing tank, the outside air flow rate for cooling is reduced, the exhaust temperature can be reduced, and the drying can be promoted. Both the prevention of hot air feeling and the improvement of drying performance can be achieved, and further, the blower 6 can be downsized.

  FIG. 3 is a characteristic diagram showing the relationship between the air volume ratio and the exhaust temperature in the first embodiment. The air in the cleaning tank is 70 ° C. and the relative humidity is RH 100%, the outside air is 15 ° C. to 30 ° C., and the relative humidity is RH 65%. Is the calculated value of the case.

  In FIG. 3, it can be seen that the higher the temperature of the outside air that cools the inside air of the cleaning tank, the larger the air volume ratio required to achieve the predetermined exhaust temperature, and the target set value of the exhaust temperature is set to 50 ° C. or less and mixed. Considering a margin for exhaust temperature unevenness or an outside air temperature rise, the air volume ratio of the outside air to the cleaning tank inside air needs to be 2 or more.

  FIG. 4 is another characteristic diagram showing the relationship between the air flow ratio and the exhaust temperature in the first embodiment. The air in the cleaning tank is higher at 80 ° C. and the relative humidity is RH 100%, and the outside air is 15 ° C. to 30 ° C. This is a calculated value when the humidity is RH 65%. If the target set value of the exhaust temperature is 50 ° C. or less, the air volume ratio of the outside air to the cleaning tank inside air is as follows, considering the mixed exhaust temperature unevenness or the outside air temperature margin. A larger air flow ratio is required as the air in the cleaning tank becomes higher, such as about 3.5.

  Therefore, when the temperature of the cleaning tank 1 is high, such as when rinsing operation is performed with high-temperature water, the air volume ratio Rs in the air volume Qs at the initial stage of the drying operation can be increased to increase the cooling capacity by the outside air. In addition, the water in the cleaning tank can be reduced by condensing and draining the water in the cleaning tank when the cleaning tank is cooled by outside air. 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, and as the wind speed near the heating means 5 is kept high, the output of the heating means 5 is increased and the drying performance is increased. Can be increased.

  Thus, by setting the air volume ratio of the outside air to the cleaning tank internal air in the mixing unit at the beginning of the drying operation to be 2 or more, the air in the high-temperature and high-humidity cleaning tank during the drying operation (cleaning tank internal air) On the other hand, a necessary and sufficient amount of outside air is mixed for cooling, the exhaust temperature is reduced and moisture in the air is reduced by condensation, and the feeling of hot air can be reliably prevented by exhaust with reduced temperature and humidity.

  In addition, the air volume ratio of the outside air to the washing tank air was reduced to 1 or less as the drying operation progressed, so that a sufficient amount of outside air at the beginning of the drying operation at a high temperature and high humidity was mixed for cooling. In addition to reducing the temperature and humidity of the exhaust, when the humidity of the cleaning tank air decreases due to the progress of the drying operation, the air volume to the cleaning tank can be made larger than the outside air volume for cooling to reduce the exhaust temperature and promote drying. Both prevention of hot air feeling of exhaust and improvement of drying performance can be achieved.

  In addition, it has air volume distribution means that changes the mixing ratio of the cleaning tank internal air and the outside air, and by using one air blower, it is possible to share drying and exhaust cooling with one air blower, and it is compact by simplifying the configuration・ Cost can be reduced, and power can be saved by sharing.

  FIG. 5 is another configuration diagram of the air volume distribution means according to the first embodiment of this invention. In FIG. 5, 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. The wind pressure at which the air 29 starts to open is made larger than that on the outside air passage 14 side, and when the damper 29 on the outside air passage 14 side starts opening, the air volume to the outside air passage 14 side is made larger than that on the washing tank air passage 15 side. ing.

  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. 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. However, it is necessary to provide the damper 29 on the side of the cleaning tank internal air passage 15 at least.

  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. 5 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 one blower 6, and the damper 29b of the cleaning tank inside air passage 15 is still closed. The outside air sent from the blower 6 almost flows to the outside air passage 14 side as indicated by an arrow in the figure, and the washing tank inside air passage 15 side is at the valve seat 31. The air volume is about the level of leakage.

  As the drying progresses, the air volume of the blower 6 is increased to increase the wind pressure, thereby increasing the opening of the damper 29a of the outside air passage 14 and starting the opening of the damper 29b of the cleaning tank internal air passage 15 (not shown). 2), the state corresponding to the air flow rate Qa shown in FIG. 2, that is, the outside air sent from the blower 6 flows into both the outside air passage 14 and the cleaning tank inside air passage 15, and the air volume on the outside air passage 14 side is indicated by the arrow in the figure. As shown by the size, the flow is larger than that in the cleaning tank air passage 15 side.

  Furthermore, by further increasing the air volume of the blower 6 to further increase the wind pressure, the dampers 29a and 29b on the outside air passage 14 side and the washing tank inside air passage 15 side are both fully opened (not shown). The flow distribution to the passage 14 and the cleaning tank air 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, that is, the state corresponding to the air flow rate Qb shown in FIG. The air volume flows more to the cleaning tank internal air passage 15 side than to the outside air passage 14 side.

  The state in which the air volume on the side of the cleaning tank internal air passage 15 increases is realized by making the passage pressure loss on the side of the cleaning tank internal air passage 15 smaller than that on the side of the outside air passage 14 when the damper 29 is fully opened. Since the cross-sectional area of the cleaning tank 1 forming the air passage 15 is sufficiently large, it is easy to design the passage resistance of the cleaning tank internal air passage 15 to be smaller than the passage resistance of the external air passage 14, and the length of the external air passage 14 is increased. By providing a resistance section (not shown) that reduces the cross-sectional area of the passage where the passage resistance increases when the flow rate exceeds a predetermined flow rate, etc., the cleaning tank internal air passage 15 side is in the middle of the operation as the drying operation proceeds. When the damper 29b is fully opened, the air volume on the cleaning tank inside air passage 15 side becomes larger than the air volume on the outside air passage 14 side.

  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.

  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 the thickness which is a shape was changed and changed its own weight, it cannot be overemphasized that a weight may be given or it may change into the material from which specific gravity differs.

  As described above, since the damper whose opening degree is changed by the wind pressure of the blower is provided, the flow distribution according to the fluid pressure is performed, so that the configuration can be simplified and the cost can be reduced.

  In addition, the damper makes the dead weight on the air side of the washing tank heavier than the weight on the outside air side, so that at the start of the drying operation, the wind on the outside air passage side starts to flow before the washing tank inside air passage side, and the exhaust temperature Can be gradually raised from the outside temperature to prevent high temperature exhaust due to exhaust temperature overshoot.

  FIG. 6 is another configuration diagram of the drying means according to the first embodiment of the present invention. In FIG. 6, the drying means 9 is provided with a first blower 6 a for sending the cleaning tank internal air into the mixing unit 13 in the cleaning tank internal air passage 15, and a second blower 6 b for sending outside air into the mixing unit 13 as the external air passage 14. I have. Further, a check means 29 is disposed in the outside air passage 14 and the cleaning tank inside air passage 15 in order to prevent the backflow of the air flow to the first blower 6a or the second blower 6b.

  The first blower 6a and the second blower 6b are operated to blow air to the cleaning tank inside air passage 15 and the outside air passage 14, respectively. The air in the high-temperature and high-humidity cleaning tank 1 (cleaning tank internal air) is sent to the mixing unit 13 by the wind sent to the cleaning tank internal air passage 15 by the first blower 6a, and the mixing unit 13 uses the second blower 6b. The air sent to the outside air passage 14 and the air in the washing tank are mixed to lower the temperature and exhaust from the exhaust port 7.

  In this drying operation, when the drying operation is started by the control means 16, the air volume of the first blower 6a, which is the air volume of the cleaning tank, is less than the air volume of the second blower 6b so that high-temperature exhaust is not emitted. In addition, the air volume control is performed by individually controlling the first blower 6a and the second blower 6b so that the air volume ratio changes as described above with the progress of the drying operation.

  For this reason, the air flow rate of the cleaning tank internal air and the external air flow rate are individually flowed by the operation of the first blower 6a that sends the cleaning tank internal air to the mixing unit 13 and the second blower 6b that sends the external air to the mixing unit 13. Control becomes possible, and the controllability of the exhaust temperature can be improved by controlling the air volume according to the dry state in the cleaning tank 1.

  In the case where one blower 6 is provided in the drying means 9 described above or in the case where the individual first blower 6a and the second blower 6b are provided in the cleaning tank inside air passage 15 and the outside air passage 14, By changing the air volume ratio of the outside air to the cleaning tank air at the beginning of the drying operation according to the temperature of the cleaning tank 1, and setting the air volume ratio of the outside air necessary and sufficient for cooling according to the temperature of the cleaning tank 1, It is possible to improve drying properties such as reliable drying or shortening the drying time, and by effectively utilizing the ventilation of the blower for drying, it is possible to reduce the excess air flow and reduce the electric input consumed by the blower, thereby saving energy.

  Further, the air volume ratio of the outside air to the washing tank air at the beginning of the drying operation is changed according to the temperature of the washing tank 1 and the temperature of the outside air, and the air volume of the outside air necessary for cooling according to the temperature of the washing tank 1 and the outside air temperature. The ratio can be set with high accuracy, and the drying performance can be further improved, such as reliable drying of tableware or shortening of the drying time, and the electric input consumed by the blower can be reduced by shortening the time required for drying. Further energy savings can be achieved.

  Further, when the temperature of the cleaning tank 1 is high, the air volume ratio of the outside air to the cleaning tank air at the beginning of the drying operation is increased, and when the temperature of the cleaning tank at the start of drying is low, the air volume ratio of the outside air is decreased and the cleaning tank 1 Increasing the air flow to the air can improve drying and save energy by promoting drying and shortening the drying time, and if the temperature of the washing tank at the start of drying is high, the air volume ratio is increased to increase the outside air for cooling. The exhaust temperature can be reliably reduced to a predetermined value, and the reliability of exhaust temperature reduction can be improved.

  In addition, when the temperature of the outside air is high, the air volume ratio of the outside air with respect to the cleaning tank air at the beginning of the drying operation is increased. By increasing the amount of air, it is possible to improve drying performance and save energy by promoting drying and shortening the drying time.When the temperature of the outside air at the start of drying is high, the air volume ratio is increased to increase the outside temperature for cooling and set the exhaust temperature to a predetermined value. It is possible to improve the reliability of exhaust temperature reduction by reliably reducing the value.

  As described above, in the present embodiment, the control means sets the air volume ratio of the outside air to the cleaning tank internal air in the mixing unit at the beginning of the drying operation to be 2 or more, so that the high temperature and high humidity during the drying operation. A necessary and sufficient amount of outside air is mixed for cooling with the air in the cleaning tank (air in the cleaning tank) to reduce the exhaust temperature and moisture in the air by condensation, and the hot air feeling by exhaust with reduced temperature and humidity Can be reliably prevented.

  In addition, the control means of the present embodiment reduces the air volume ratio of the outside air to the washing tank air to 1 or less as the drying operation proceeds, so that the washing tank air is sufficient at the beginning of the drying operation at a high temperature and high humidity. In addition to reducing the temperature and humidity of the exhaust gas mixed with a large amount of outside air for cooling, when the humidity of the cleaning tank air decreases due to the progress of the drying operation, the air volume to the cleaning tank should be made larger than the outside air volume for cooling. The exhaust temperature can be reduced and drying can be promoted, and both the prevention of hot air feeling and the improvement of drying performance can be achieved.

  Further, the control means of the present embodiment has an air volume distribution means for changing the mixing ratio of the cleaning tank inside air and the outside air provided on the upstream side of the mixing section, and since there is one air blower, one air blower is provided. In addition, drying and exhaust cooling can be shared, and the size can be reduced and the cost can be reduced by simplifying the configuration, and power can be saved by sharing.

  Further, since the air volume distribution means of the present embodiment is provided with a damper whose opening degree changes depending on the wind pressure of the blower, the flow volume distribution according to the fluid pressure is made, so that the configuration can be simplified and the cost can be reduced. .

  In addition, the damper of the present embodiment is configured such that the air on the outside side of the washing tank flows earlier than the side of the washing tank's internal air passage when drying operation is started by making the own weight on the washing tank's internal air side heavier than that on the outside air side. The exhaust temperature is gradually raised from the outside air temperature to prevent high-temperature exhaust due to exhaust temperature overshoot.

  Further, the drying means of the present embodiment includes the first blower that sends the cleaning tank internal air to the mixing unit and the second blower that sends the external air to the mixing unit, so that the air volume of the cleaning tank internal air and the outside air The flow rate can be individually controlled for each air volume, and the controllability of the exhaust temperature can be improved.

  Further, the control means of the present embodiment includes a cleaning tank temperature detecting means for detecting the temperature of the cleaning tank, and changes the air volume ratio of the outside air to the cleaning tank air at the beginning of the drying operation according to the temperature of the cleaning tank. By setting the air volume ratio of the outside air that is necessary and sufficient for cooling according to the temperature of the washing tank, it is possible to improve drying properties such as reliable drying of tableware or shortening of drying time, and drying of the air blower By making effective use, the electric input consumed by the blower can be reduced to save energy.

  Further, the control means of the present embodiment includes a cleaning tank temperature detecting means for detecting the temperature of the cleaning tank and an outside air temperature detecting means for detecting the temperature of the outside air, and starts a drying operation according to the temperature of the cleaning tank and the temperature of the outside air. By changing the air volume ratio of the outside air to the initial cleaning tank air, it becomes possible to set the air volume ratio of the outside air necessary for cooling according to the temperature of the cleaning tank and the outside air temperature with high accuracy. The drying property can be further improved such as reliable drying or shortening of the drying time, and by reducing the time required for drying, the electric input consumed by the blower can be reduced and further energy saving can be achieved.

  In addition, when the temperature of the washing tank is high, the control means of the present embodiment increases the air volume ratio of the outside air to the washing tank air at the beginning of the drying operation. By increasing the air volume to the washing tank by reducing the air volume ratio, the drying rate can be improved and energy can be saved by shortening the drying time. When the temperature of the washing tank is high at the start of drying, the air volume ratio is increased. As a result, the outside air for cooling is increased and the exhaust temperature is reliably reduced to a predetermined value, thereby improving the reliability of the exhaust temperature reduction.

  Further, the control means of the present embodiment increases the air volume ratio of the outside air with respect to the washing tank air at the beginning of the drying operation when the temperature of the outside air is high, so that the air volume ratio is reduced when the temperature of the outside air at the start of drying is low. By reducing the size and increasing the air flow to the washing tank, it is possible to improve drying performance and save energy by promoting drying and shortening the drying time.When the temperature of the outside air at the start of drying is high, the air flow ratio is increased to increase the air flow rate. The reliability of exhaust temperature reduction can be improved by increasing the outside air and reliably reducing the exhaust temperature to a predetermined value.

  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 Airflow distribution control diagram of the dishwasher Characteristic diagram showing the relationship between air flow ratio and exhaust temperature of the dishwasher Another characteristic diagram showing the relationship between air flow ratio and exhaust temperature of the dishwasher Another block diagram of the air volume distribution means of the dishwasher Another block diagram of the drying means of the dishwasher Configuration of conventional dishwasher

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Washing tank 4 Cleaning means 5 Heating means 6 Blower 6a 1st blower 6b 2nd 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 (7)

A cleaning tank for storing the object to be cleaned, a cleaning means for spraying and circulating the 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, a blower, and the exhaust port A drying unit having a mixing unit that is arranged on the upstream side of the cleaning tank and that mixes and cools the outside air that has flowed in from the outside of the machine body into the cleaning tank inside air that has flowed out of the cleaning tank, and a control unit that controls the drying unit. The drying means has an air volume distribution means for changing the mixing ratio of the cleaning tank inside air and the outside air provided on the upstream side of the mixing section, the blower is one, and the air volume distribution means is the air pressure of the blower. The damper has a damper whose opening degree changes, and the damper makes its own weight on the air side of the washing tank heavier than its own weight on the outside air side, and the control means distributes to the outside air volume in the mixing unit at the beginning of the drying operation. Increase the distribution to the air volume in the washing tank Dishwasher having an increased outside air airflow ratio to said cleaning tank vapor and. The dishwasher according to claim 1, wherein the control means sets the air volume ratio of the outside air to the washing tank inside air in the mixing section at an initial stage of the drying operation to 2 or more. The dishwasher according to claim 1 or 2 , wherein the control means reduces the air volume ratio of the outside air to the washing tank air to 1 or less as the drying operation proceeds. Control means includes a cleaning tank temperature detecting means for detecting the temperature of the cleaning tank, any claim 1-3 with varying air volume ratio of outside air to washing tank air drying operation started early in response to the temperature of the wash tank A dishwasher according to claim 1. The control means includes a cleaning tank temperature detecting means for detecting the temperature of the cleaning tank and an outside air temperature detecting means for detecting the temperature of the outside air, and the cleaning tank air at the start of the drying operation according to the temperature of the cleaning tank and the temperature of the outside air. The dishwasher according to any one of claims 1 to 3 , wherein an air volume ratio of outside air to the air is changed. 6. The dishwasher according to claim 4 or 5 , wherein the control means increases the air volume ratio of the outside air to the washing tank air at the beginning of the drying operation when the temperature of the washing tank is high. The dishwasher / dryer according to claim 5 or 6 , wherein the control means increases the air volume ratio of the outside air to the washing tank air at the beginning of the drying operation when the temperature of the outside air is high.