JP5319360B2 - Dishwasher - Google Patents

Description

  The present invention is provided with control means for executing a cleaning process for cleaning an object to be cleaned in an openable / closable cleaning space, a rinsing process for the object to be cleaned, and a drying process for drying the object to be cleaned. Ventilation means for circulating air in the cleaning space through a ventilation path extending from an air suction port to the cleaning space and an air supply port to the cleaning space, and a dehumidifying unit for dehumidifying the air circulated through the ventilation path Further, the present invention relates to a dishwasher configured to control the operation of the ventilation unit and the dehumidifying unit so that the control unit circulates the air in the cleaning space while dehumidifying in the drying process.

Such a dishwasher will be used to wash dishes such as dishes and teacups.
That is, as a standard form of use, when a cleaning object is stored in the cleaning space, a cleaning process for cleaning the cleaning object with a cleaning liquid is performed, and then the cleaning object is rinsed with rinse water. It is used to perform a rinsing process, followed by a drying process in which drying air is blown through the object to be cleaned. In some cases, the object to be cleaned does not need to be washed by hand. On the other hand, it may be used in various usage forms such as rinsing and drying.

In the dishwasher, generally, a heater is provided at the bottom of the cleaning space, heating the cleaning liquid in the cleaning process, heating the rinse water in the rinsing process, and drying in the drying process. The working air will be heated.
Incidentally, the rinsing process usually involves a plurality of rinsing steps. That is, rinsing with rinsing water for a set time, discharging the rinsing water, and then rinsing with new rinsing water is often performed multiple times, and the rinsing water is heated with a heater. However, in the last rinsing step, the rinsing water is often heated to a higher temperature than in the other steps.

The dishwasher includes a ventilation means for circulating the air in the cleaning space through the ventilation path, and a dehumidifying unit for dehumidifying the air circulated through the ventilation path. In the drying process, the air in the cleaning space is dehumidified. Since the air is not circulated out of the machine during the drying process, the user and other equipment in the place where the dishwasher is installed The inconvenience that the moist air is blown is suppressed, and the usability is good (for example, refer to Patent Document 1).
Incidentally, in the tableware washing machine of patent document 1, the inside of the washing tub formed in the warehouse corresponds to the washing space, and the washing space is opened and closed by opening and closing the door.

JP-A-8-131391

  In a conventional dishwasher, that is, a dishwasher that is provided with ventilation means and a dehumidifying unit and is configured to circulate air in the washing space while dehumidifying in the drying process, when the washing space is closed, Since the cleaning space is hermetically sealed, the internal pressure of the cleaning space may greatly increase and decrease, and troubles such as deformation and damage of wall bodies that define the cleaning space may occur.

That is, for example, the final rinsing process in the rinsing process, that is, the operation of additionally storing the object to be cleaned or the part of the object to be cleaned being taken out during the high temperature rinsing by operating the heater. In order to perform the operation, etc., once the operation was stopped, the cleaning space was opened, the required work was performed, and then the high temperature rinse operation was started again. When the cleaning space was opened, it entered the cleaning space. A large amount of air is heated by high-temperature rinsing and rapidly expands, so that the internal pressure of the cleaning space is greatly increased, and there is a possibility that the wall body or the like that defines the cleaning space is deformed and damaged.
Incidentally, although the cleaning space is in a closed state when it is closed, there are various minute gaps. If a large amount of air in the cleaning space does not expand rapidly, the internal pressure of the cleaning space increases. There is no increase.
Note that the temperature of the air that enters the cleaning space when the cleaning space is opened corresponds to the indoor temperature (for example, 15 to 25 ° C.). The temperature is a fairly high temperature (for example, 80 ° C.).

As described above, if the internal pressure of the cleaning space is greatly increased, the following trouble may occur.
That is, the cleaning process is performed in such a manner that the cleaning water is stored at the bottom of the cleaning space and the cleaning water is ejected from the cleaning nozzle by the operation of the pump, and the cleaning rinsing process is performed at the bottom of the cleaning space. Rinsing water is stored, and the rinsing water is ejected from the washing nozzle by the operation of the pump. In this way, cleaning water and rinsing water are stored at the bottom of the cleaning space, but when storing cleaning water and rinsing water as such, it is necessary to detect the water level. A water level detection means is provided.
When the internal pressure of the cleaning space increases greatly, the water level detection means erroneously detects that the water level of the rinse water stored at the bottom of the cleaning space is abnormally rising, and the operation is There is a risk of inconvenience of being forced to stop.

Also, as an example of a dishwasher, a washing tub with an upper opening is provided so that it can be pulled out and moved with respect to the main body, and a lid that opens and closes the upper opening of the washing tub pulls out the washing tub. There is a so-called drawer type dishwasher that is open when it is moved and closed when the washing tank is stored and moved, and a washing space is formed in the washing tank.
In such a drawer-type dishwasher, if the internal pressure of the washing space is greatly increased, the lid body may bulge and be damaged, or the lid body may be bulged and deformed. Unnecessary gaps appear, and the rinse water ejected from the ejection nozzle scatters to the outside through the gaps. As a result, the scattered rinse water is detected by the leak detection means, and the operation is forced. There is also a risk of inconvenience of being stopped.

As described above, the internal pressure of the cleaning space may increase significantly, but the internal pressure of the cleaning space may decrease significantly as described below.
That is, in the cleaning process, when the heater is heated, the temperature in the cleaning space becomes considerably high (for example, 60 ° C.). Thereafter, the washing water is discharged, and the rinsing water is supplied to the washing space for the rinsing process, and the rinsing water is ejected from the washing nozzle by the operation of the pump, but the temperature of the rinsing water is low ( For example, 13 to 17 ° C.). For this reason, when low-temperature rinse water is ejected from the ejection nozzle, the temperature in the cleaning space rapidly decreases, and as a result, a large amount of air in the cleaning space rapidly contracts and the internal pressure of the cleaning space is reduced. Is greatly reduced, and there is a risk that the wall body or the like that defines the cleaning space may be deformed and damaged.
Incidentally, in the above-described drawer type dishwasher, the lid that closes the upper part of the washing tank may be recessed and deformed.

  As described above, in the dishwasher provided with the ventilation means and the dehumidifying unit and configured to circulate the air in the cleaning space while dehumidifying in the drying process, when the cleaning space is closed, the cleaning space is sealed. Therefore, there is a risk that the internal pressure of the cleaning space greatly increases or decreases, and troubles such as deformation or damage of the wall body or the like that defines the cleaning space may occur, and improvement is desired.

  The present invention has been made in view of the above circumstances, and its purpose is to avoid a large increase or decrease in the internal pressure of the cleaning space, and to deform or damage the wall body or the like that defines the cleaning space. It is in the point which provides the dishwasher which can suppress trouble occurrence.

The tableware washing machine of the present invention includes a control means for performing a cleaning process for cleaning an object to be cleaned in an openable and closable cleaning space, a rinsing process for the object to be cleaned, and a drying process for drying the object to be cleaned. Provided,
Ventilation means for circulating air in the cleaning space through a ventilation path extending from an air suction port to the cleaning space and an air supply port to the cleaning space, and a dehumidifying unit for dehumidifying the air circulated through the ventilation path Provided,
In the drying process, the control means is configured to control the operation of the ventilation means and the dehumidifying unit so as to circulate the air in the cleaning space while dehumidifying the first characteristic configuration. Is
Pressure adjusting means for automatically adjusting the internal pressure of the cleaning space in the closed state to be the external pressure of the machine is provided ,
When the internal pressure of the cleaning space becomes higher than the external pressure of the pressure adjustment means, the pressure adjusting means is opened by the pressure difference and communicates the cleaning space with the outside of the device, and the cleaning space When the internal pressure of the machine is lower than the external pressure of the machine, it is opened by the pressure difference and is provided with a closed biased outdoor air introduction valve that communicates the cleaning space with the outside of the machine,
The pressure adjusting means is formed in a unit shape including the pressure relief valve and the outside air introduction valve,
The pressure adjusting means formed in a unit shape is assembled to the space forming member that forms the cleaning space,
The water level detection means for detecting the level of hot water stored in the lower part of the cleaning space comprises a communication part communicating with the inside of the cleaning space on the lower part side and an air release part for opening the atmosphere on the upper side. Comprising a hot water reservoir and a detector for detecting the level of hot water stored in the reservoir,
The pressure adjusting means is formed in a state including the pressure relief valve and the outside air introduction valve in a casing that communicates with the inside of the cleaning space and communicates with an upper side portion of the hot water storage body,
The casing communicating with the upper side portion of the hot water storage body is provided on the upper side of the hot water storage body so as to return the condensed water generated inside to the inside of the hot water storage body. .

In other words, the internal pressure of the cleaning space in the closed state is automatically adjusted by the pressure adjusting means so as to become the external pressure, that is, the atmospheric pressure.
Therefore, for example, during high temperature rinsing as a rinsing process, even if low temperature air enters the cleaning space and the low temperature air expands, the pressure adjustment is performed even if the internal pressure of the cleaning space increases. By the means, the internal pressure in the cleaning space is automatically adjusted so as to become the external pressure.

  In addition, for example, the internal pressure of the cleaning space decreases due to the air in the cleaning space contracting, etc., by ejecting a low temperature rinsing in order to perform the rinsing process in the cleaning space that is hot in the cleaning process. Even if trying to do so, the pressure adjusting means automatically adjusts the internal pressure in the cleaning space to be the external pressure.

  Thus, since the internal pressure of the cleaning space is adjusted to be the external pressure, it is possible to suppress the occurrence of troubles such as deformation or damage of the wall body or the like that defines the cleaning space.

  In short, according to the first characteristic configuration of the tableware washing machine of the present invention, it is possible to avoid the occurrence of troubles such as deformation or damage of the wall body or the like that partitions the washing space while avoiding a large increase or decrease in the internal pressure of the washing space. Can be suppressed.

Further, according to the first characteristic configuration, when the internal pressure of the cleaning space becomes higher than the external pressure of the machine, a closed biased pressure relief valve that is opened by the pressure difference and communicates the cleaning space and the outside of the machine, When the internal pressure of the cleaning space becomes lower than the external pressure of the machine, the internal pressure of the cleaning space is reduced to the external pressure by the closed-biased outside air introduction valve that opens at the pressure difference and communicates the cleaning space with the outside of the machine. Will be adjusted.

Since the pressure relief valve and the outside air introduction valve are opened and closed using the pressure difference between the internal pressure of the cleaning space and the external pressure of the machine, the pressure adjusting means can be simplified.
That is, as a pressure adjusting means, a pressure detection sensor for detecting the pressure in the cleaning space, an electric on-off valve for opening and closing the communication between the cleaning space and the outside of the machine, and the detection information of the cleaning space based on the detection information of the pressure sensor It is conceivable to configure a pressure adjusting means including a control means for controlling the opening / closing valve to open when the internal pressure increases or decreases below the set pressure with respect to the external pressure. A complicated configuration includes a pressure detection sensor, an electric on-off valve, and control means.

According to the first characteristic configuration, the pressure adjusting means is configured by using the closed-biased pressure relief valve and the outside air introduction valve which are opened and closed using a pressure difference between the internal pressure of the cleaning space and the external pressure of the machine. Therefore, the configuration can be simplified.

In short, according to the first characterizing feature of the dishwasher of the present invention, in addition to the above Symbol operation for effect, it is possible to simplify the configuration.

Further, according to the first characteristic configuration , the pressure adjusting means is formed in a unit shape including a pressure relief valve and an outside air introduction valve, and the pressure adjusting means formed in such a unit shape is a space that forms a cleaning space. Since it is assembled to the forming member, the assembly operation of the pressure adjusting means can be easily performed.

In short, according to the first characterizing feature of the dishwasher of the present invention, in addition to the above Symbol operation for effect, it is possible to facilitate the assembly work.

According to the first characteristic configuration, the water level detecting means for detecting the level of the hot water stored in the lower part of the cleaning space includes the communication part communicating with the inside of the cleaning space on the lower part side and the atmosphere on the upper side. The hot water storage body provided with the open | release air | atmosphere release part and the detection sensor which detects the water level of the hot water stored in the storage body are comprised.
That is, the cleaning process is performed in such a manner that the cleaning water is stored at the bottom of the cleaning space and the cleaning water is ejected from the cleaning nozzle by the operation of the pump, and the rinsing process is performed at the bottom of the cleaning space. Water is stored and the rinse water is ejected from the washing nozzle by the operation of the pump. In this way, cleaning water and rinsing water are stored at the bottom of the cleaning space. When storing cleaning water and rinsing water in such a manner, it is necessary to detect the water level. The correct water level can be detected by the water level detection means.

  And, since the pressure adjusting means is formed in a state including a pressure relief valve and an outside air introduction valve in the casing communicating with the inside of the cleaning space and communicating with the upper side portion of the hot water storage body, The outside air introduction valve can be opened and closed appropriately according to the pressure difference between the internal pressure of the cleaning space and the internal pressure of the hot water reservoir that is open to the atmosphere, and condensation water is generated in the casing of the pressure adjustment means. Even if it does, the dew condensation water can be returned to the inside of the hot water reservoir of the water level detection means.

  When the explanation is added, the inside of the casing of the casing of the pressure adjusting means communicates with the inside of the cleaning space, and therefore, dew condensation water is generated due to the flow of steam in the cleaning space. It is necessary to return this condensed water to the inside of the washing space so as not to cause abnormal leakage. However, the condensed water should be returned to the inside of this hot water reservoir by effectively using the hot water reservoir of the water level detection means. Thus, the dew condensation water can be returned to the inside of the cleaning space with a simple configuration using the water level detection means.

In short, according to the 1st characteristic structure of the dishwasher of this invention, in addition to the said effect, the process of condensed water can be performed with a simple structure.

The second characteristic feature of the dishwasher of the present invention, in addition to the first Japanese Cho構formed,
The air suction port and the air supply port are formed at lower positions in the side wall portion of the cleaning space,
The ventilation path is configured in an inverted U shape including an upward path portion extending upward from the air suction port and a downward path portion extending downward from the upper end portion of the upward path portion toward the air supply port. It is characterized by that.

  That is, the ventilation path is configured in an inverted U shape including an upward path portion extending upward from the air suction port and a downward path portion extending downward from the upper end portion of the upward path portion toward the air supply port. Therefore, it is possible to suppress clogging of leftovers in the cleaning space in the ventilation path.

  When adding explanation, there is a possibility that leftovers in the cleaning space may be scattered in the ventilation path during the rinsing process and the rinsing process, but the ascending path part and the descending path part extend vertically. The leftovers scattered in the ventilation path do not move to the upper side of the ventilation path, and the leftovers scattered in the ventilation path fall into the washing space due to their own weight falling in the ventilation path. It becomes possible to suppress clogging of leftovers in the cleaning space in the ventilation path.

In short, according to the second characterizing feature of the dishwasher of the present invention, in addition to the effects according to the first feature structure can be suppressed Zan'na such clogging in the ventilation path.

Perspective view of dishwasher Notched side view with the cleaning tank stored The perspective view which looked at the washing tank which removed the front door from the front side Perspective view of the cleaning tank as seen from the back Schematic diagram of dishwasher Schematic perspective view showing the flow state of drying air Flow chart showing control operation Front view of pressure adjustment means Front view of pressure adjustment means Front view showing casing The perspective view which shows a valve mounting frame and a valve body Perspective view of water level sensor Notch front view of water level sensor Notch front view of water level sensor

Embodiment
A dishwasher according to the present invention will be described with reference to the drawings.
As shown in FIG. 1 to FIG. 4, a main body portion 1 having an open front portion is provided, and a drawer portion 2 including a cleaning tank D having a square shape in plan view is drawn out from the main body portion 1. A drawer-type dishwasher as an example of a dishwasher is configured to be movable and retractable.
Although not illustrated, a slide-type rail mechanism is provided that supports the drawer portion 2 so as to be movable with respect to the main body portion 1, and the drawer portion 2 exposes most of the main body portion 1 to the outside. It is configured so that it can be pulled out to the state.

  And the inner cover part which obstruct | occludes the upper surface part of the washing tank D in the state which accommodated the drawer part 2 in the main-body part 1, and opens the upper surface part of the washing tank D in the state which pulled out the drawer part 2 from the main body part 1 3 is provided, and an openable / closable cleaning space Q is formed in the internal space of the cleaning tank D.

The front part of the drawer part 2 is provided with a door body A that opens and closes the opening of the front part of the main body part 1, and the door body A is gripped when the drawer part 2 is pulled out from the main body part 1 or stored. A holding part B is provided. Although not described in detail, an engaging means P that engages with the engaging portion Pa of the main body 1 as the drawer 2 is housed in the main body 1 is provided at the inner side portion of the grip B. When the engaging means P is engaged with the engaging portion Pa, the drawer portion 2 is held in the state of being housed in the main body portion 1. Then, the engaging means P can be operated in a released state in which the engagement is released with the fingers supporting the gripping part B when the drawer part 2 is pulled out from the main body part 1.
Further, the door body A is provided with an operation unit SS for performing various operations for driving.

As shown in FIGS. 2 and 5, a water supply path 4 for supplying water to the cleaning tank D and a water supply valve 4 a for opening and closing the water supply path 4 are provided.
Below the bottom of the washing tank D in the drawer 2 is provided a dual-purpose pump 6 that functions as a cleaning pump in the forward rotation and functions as a drainage pump in the reverse rotation. An electric heater 9 or the like as a heating means is disposed, and a cleaning basket 10 for storing and placing an object to be cleaned such as tableware is detachably mounted inside the cleaning tank D.

The dual-purpose pump 6 is connected to a water storage recess S formed at the bottom of the cleaning tank D by a suction pipe 11 and a drain pipe 12 is connected thereto.
A water level sensor J is connected to the water storage recess S through a guide tube 13.
As shown in FIG. 2, a drain pan 14 for receiving water leakage is provided at the bottom of the main body 1. Although not illustrated, the presence or absence of water received and collected by the drain pan 14 is detected. It will be equipped with a leak sensor.

As shown in FIGS. 2, 3, and 5, a drying unit K is attached to the front side wall portion Df corresponding to the front side of the machine body, that is, the front side of the drawer, among the four side walls in the cleaning tank D. ing.
That is, as shown in FIG. 6, the air supply port 21 that supplies the air from the drying unit K to the cleaning space Q and the drying unit K suck the air in the cleaning space Q into the front side wall portion Df. The air suction port 22 is formed at a position away from the left and right sides on the lower side. Specifically, the air supply port 21 and the air suction port 22 are formed so as to be positioned below the cleaning basket 10, and in the present embodiment, the air supply port 21 is on the right side. The air suction port 22 is positioned on the left side.

The drying unit K is a ventilation means for circulating the air in the cleaning space Q through the ventilation path F extending between the air suction port 22 and the air supply port 21 inside the casing 11 fixed to the front side wall portion Df of the cleaning tank D. And a dehumidifying part G that dehumidifies the air circulated through the ventilation path F.
The ventilation path F has an inverted U-shape composed of an ascending path part f1 extending upward from the air suction port 22 and a descending path part f2 extending downward from the upper end of the ascending path part f1 toward the air supply port 21. The dehumidifying part G is disposed in the ascending path part f1, and the circulation fan 23 is disposed in the descending path part f2.

The dehumidifying part G juxtaposes a plurality of heat transfer plates 24 at intervals along the plate thickness direction, and ejects dehumidification water from the ejection nozzle 25 toward the heat transfer plates 24, thereby By cooling the air flowing upward between the heat transfer plates 24 by contact with dehumidification water flowing down the surface of the heat transfer plate 24 and by contact with dehumidification water flowing down between the heat transfer plates 24 The water in the air is condensed and dehumidified.
The dehumidifying water ejected from the ejection nozzle 25 flows into the cleaning tank D through the air suction port 22 and is stored in the water storage recess S.
As shown in FIG. 5, a dehumidification water supply path 26 for supplying water to the ejection nozzle 25 is provided, and a dehumidification water intermittent valve 27 for opening and closing the dehumidification water supply path 26 and a governor 28 for stabilizing the supply water pressure are provided. It has been.

  Then, with the electric heater 9 heated, the circulation fan 23 is ventilated and the ejection nozzle 25 is ejected with dehumidifying water. After the dehumidification, the drying air is supplied to the cleaning space Q as drying air, and the supplied air is heated by the electric heater 9 to dry the cleaning object in the cleaning space Q. It is configured to do so.

  In addition, with the electric heater 9 stopped, the circulation fan 23 is ventilated and the ejection nozzle 25 is ejected with dehumidifying water to dehumidify odor components in the air sucked from the cleaning space Q. After being absorbed in dehumidification water by the part G, the deodorizing operation for deodorizing the cleaning space Q can be performed by supplying it to the cleaning space Q.

The air flow in the drying operation will be described. As shown in FIG. 6, the air supplied to the cleaning space Q from the air supply port 21 formed in the front side wall portion Df of the cleaning tank D rises as a main flow. While flowing toward the rear side wall, and then moving downward toward the air suction port 22 formed on the lower side of the front side wall Df and at a position separated from the air supply port 21 in the left-right direction. It flows and flows in a form discharged from the air suction port 22, and air easily flows also to a lower portion of the cleaning tank where the air suction port 22 is located.
Therefore, it is possible to shorten the drying time by allowing air to flow through the entire cleaning object in the cleaning tank and drying the cleaning object efficiently.

  As shown in FIG. 5, the drawer 2 is equipped with a control unit H as a control means for controlling the operation, and the control unit H is based on a command input from the operation unit SS, and the water supply valve 4a. The operation of the dual-purpose pump 6, the electric heater 9, the circulation fan 23, and the dehumidifying water intermittent valve 27 is controlled, and the cleaning object of the cleaning space Q formed inside the cleaning tank D is used as a cleaning liquid. Cleaning operation for cleaning with hot water of water, rinsing operation for rinsing the object to be cleaned with rinsing water stored in the water storage recess S of the cleaning tank D and heated by the electric heater 9, With the drainage operation for draining the rinse water stored in the water storage recess S, the ventilation operation of the circulation fan 23 and the ejection operation of the dehumidifying water of the ejection nozzle 25 are performed while the electric heater 9 is heated. Dry operation and electric processing An operation such as a deodorizing operation for performing the ventilation operation of the circulation fan 23 and the ejection operation of the dehumidifying water of the ejection nozzle 25 while the heater 9 is stopped is performed. Next, the operation performed by the control unit H Add a description.

  That is, the user selects various operation courses such as a continuous operation course in which washing operation, rinsing operation, drainage operation, drying operation, and deodorizing operation are operated in this order, and a drying only course in which only the drying operation is operated by the operation unit SS. Further, as a continuous operation course, a standard operation course, a careful operation course, a speedy operation course, and a rapid operation course are provided. In this embodiment, only the standard operation course will be described.

The control operation of the control unit H will be described based on the flowchart of FIG.
First, it is detected by the storage switch (not shown) that the drawer 2 is stored in the storage position of the main body 1 (# 1), and the power switch of the operation unit SS is turned on (# 2). A course is selected (# 3). In the present embodiment, the description will be continued assuming that the standard driving course is selected.
When the start switch of the operation unit SS is turned ON (# 4), the standard operation course is started, and the cleaning operation (# 5), the rinsing operation (# 10), the drain operation (# 15), and the drying operation (#) 16) The deodorizing operation (# 21) is sequentially executed.

In the washing operation, first, the water supply valve 4a is opened, the cleaning water is supplied into the cleaning tank D through the water supply passage 4, and when the water level sensor J detects that the water level has reached the set water level, A cleaning operation for performing a water supply operation for closing the valve 4a, and then forwardly operating the dual-purpose pump 6 and the heater 9 to eject the cleaning water from the cleaning nozzle 8 toward the object to be cleaned. This is performed until the set time elapses, and then the combined drainage pump 6 is operated in reverse to perform a draining operation for draining the cleaning water in the cleaning tank D.
In addition, before the user turns on the start switch of the operation unit SS, the cleaning detergent can be put into the cleaning tank D to perform cleaning using the detergent.

Then, after the cleaning operation (# 5) is started, it is determined whether or not the cleaning operation has ended after the set time for the cleaning operation has passed (# 6). 9).
When it is determined in # 6 that the cleaning is not finished, it is determined whether or not an interruption command is instructed in the operation unit SS (# 7), and when the interruption command is instructed, the dual-purpose pump 6 is stopped. An interruption process for interrupting the cleaning operation is performed (# 8).
Thereafter, the cleaning operation is interrupted until a restart command is issued by the operation unit SS (# 9). When the cleaning command is interrupted while the cleaning operation is interrupted (# 9), The cleaning operation will be resumed.
Since the cleaning operation can be interrupted in this way, when it is desired to add a cleaning object, the cleaning object can be stored in the cleaning space Q.

In the rinsing operation, a water supply operation similar to the water supply operation in the above-described cleaning operation is performed to store the set water level at the bottom of the cleaning tank D, and then the combined pump 6 and the heater 9 are operated to The rinse operation in which the object to be cleaned is rinsed with the rinse water heated in 9 until the set time elapses, and the dual-purpose pump 6 is operated in reverse to drain the rinse water stored in the bottom of the cleaning tank D. The rinsing operation for sequentially performing the draining operation is performed twice, and finally the heating rinsing operation is performed.
The heating rinsing operation is performed by rinsing water heated by the heater 9 by operating the combined pump 6 and the heater 9 after storing the set water level at the bottom of the washing tank D by the above-described water supply operation. The object to be cleaned is rinsed, and when the temperature of the rinse water reaches the finishing set temperature (for example, 67 ° C.) by a temperature sensor (not shown), the heating rinse operation is terminated.

Then, after the rinsing operation (# 10) is started, it is determined whether or not the rinsing operation is completed after all the steps of the rinsing operation are completed (# 11). 15).
If it is determined in # 11 that the rinsing has not been completed, it is determined whether or not an interruption command has been instructed by the operation unit SS (# 12). If the interruption command has been instructed, the combined pump 6 and the heater An interruption process for interrupting the rinsing operation such as stopping 9 is performed (# 13).
Thereafter, the rinsing operation is interrupted until a restart command is issued from the operation unit SS (# 14). When the restart command is issued when the rinse operation is interrupted (# 14), the rinsing operation is performed. Will resume.
Since the rinsing operation can be interrupted in this way, when it is desired to add an object to be rinsed, the object to be washed can be stored in the washing space Q.

  In the drainage operation, the dual-purpose pump 6 is reversely operated to drain the rinse water stored in the bottom of the cleaning tank D until the rinse water stored in the bottom of the cleaning tank D is discharged. Become.

  In the drying operation, while the electric heater 9 is heated, the circulation fan 23 is ventilated and the ejection nozzle 25 is ejected with dehumidifying water. , 25 minutes). And if the set time for drying passes, the drain operation which drains the dehumidification water stored by the bottom part of the washing tank D will be performed.

Then, after the drying operation (# 16) is started, it is determined whether or not the drying has been completed after the set time for drying has elapsed (# 17). 21).
If it is determined in # 17 that the drying has not been completed, it is determined whether or not an interruption command is instructed in the operation unit SS (# 18). If the interruption command is instructed, the heating operation of the heater 9 is performed. Then, interruption processing for interrupting the drying operation, such as stopping the ventilation operation of the circulation fan 23 and the ejection operation of the ejection nozzle 25, is performed (# 19).
Thereafter, the drying operation is interrupted until a restart command is issued by the operation unit SS (# 20). When the restart command is issued while the drying operation is interrupted (# 20), the drying operation is performed. Will resume.
Since the drying operation can be interrupted in this way, when a cleaning object to be dried is added, the cleaning object can be stored in the cleaning space Q.

  In the deodorizing operation, with the electric heater 9 stopped, the circulation fan 23 is ventilated and the ejection nozzle 25 is ejected with dehumidifying water. Repeat until it has passed. Then, when the set time for deodorization elapses, a draining operation for draining the deodorizing water stored in the bottom of the cleaning tank D is performed.

As shown in FIGS. 4 and 5, there is provided pressure adjusting means W for automatically adjusting the internal pressure of the cleaning space Q in the closed state to be the external pressure of the machine.
That is, for example, in the final rinsing step in the rinsing process, that is, in the middle of performing high temperature rinsing by operating the electric heater 9, an operation for additionally storing the object to be cleaned, or for the object to be cleaned being cleaned When the cleaning space Q is opened after the operation is stopped, the cleaning space Q is opened and the necessary work is performed to perform a part removal operation, etc. A large amount of air that has entered the cleaning space Q is heated by the high temperature rinse and rapidly expands, so that the internal pressure of the cleaning space Q may increase greatly. By the action of the means W, the internal pressure of the cleaning space Q is automatically adjusted so as to become the external pressure.

  In the cleaning process, when the electric heater 9 is heated, the temperature in the cleaning space Q is considerably high (for example, 67 ° C.). Thereafter, the washing water is discharged, and the rinsing water is supplied to the washing space Q for the rinsing process, and the rinsing water is ejected from the washing nozzle 8 by the operation of the combined pump 6. The temperature is low (for example, 13 to 17 ° C.). For this reason, when low-temperature rinse water is ejected from the cleaning nozzle 8, the temperature in the cleaning space Q rapidly decreases. As a result, a large amount of air in the cleaning space Q contracts rapidly, and the cleaning space Q In some cases, the internal pressure of Q tends to decrease greatly. In such a case, the internal pressure of the cleaning space Q is automatically adjusted to the external pressure by the action of the pressure adjusting means W.

  When the pressure adjusting means W is further described, as shown in FIGS. 8 and 9, when the internal pressure of the cleaning space Q becomes higher than the external pressure, the pressure difference is opened and the cleaning space Q and the external space are separated. When the internal pressure of the closed biasing pressure relief valve V1 and the cleaning space Q that is in communication is lower than the external pressure of the machine, it is opened by the pressure difference and the closed biased outside air that communicates the cleaning space Q with the outside of the machine is introduced. When the valve V2 is provided and the internal pressure of the cleaning space Q becomes higher than the external pressure of the machine, the air in the cleaning space Q is discharged to the outside through the pressure relief valve V1, and the internal pressure of the cleaning space Q is When the pressure is lower than the external pressure, the external air is introduced into the cleaning space Q through the external air introduction valve V2, so that the internal pressure of the closed cleaning space Q is automatically adjusted to the external pressure. .

That is, a casing 31 having a rectangular parallelepiped shape with one side opened and provided with an external communication cylinder portion 31A is provided. As shown in FIG. 4, the casing 31 is assembled in a state in which an annular welding edge 31 </ b> B on one side of the opening is welded to the rear wall DR in the cleaning tank D as a space forming member that forms the cleaning space Q. Will be.
And the pressure relief valve V1 and the external air introduction valve V2 are assembled | attached inside the casing 31, and the pressure adjustment means W is formed in unit shape.

A partition wall 31C is provided inside the casing 31, and is partitioned into a communication space portion U1 communicating with the cleaning space Q through a communication hole 32 formed in the rear wall DR, and a valve mounting space portion U2. Yes. The communication space portion U1 and the valve mounting space portion U2 are communicated with each other through a communication portion R that allows air to pass therethrough.
The external communication cylinder portion 31A is provided in communication with the valve mounting space portion U2.

On the inner wall of the casing 31, as shown in FIG. 10, first to third grooves in which a valve mounting frame 33 (see FIG. 11) having a U-shape in side view is engaged and supported in an internally fitted state. First and second projecting portions 35a and 35b that are engaged and supported in an externally fitted state by the upper end portion and the intermediate portion of the valve mounting frame 33 and the valve mounting frame 33, The mounting frame 33 is assembled to the casing 31 in a state of being engaged and supported by the first to third groove portions 34a, 34b, 34c, and the first and second protrusions 35a, 35b. Yes.
As shown in FIG. 11, the valve mounting frame 33 connects the upper frame portion 33A for assembling the outside air introduction valve V2, the lower frame portion 33C for assembling the pressure relief valve V1, and the frame portions 33A and 33C. An intermediate frame portion 33B is provided. 33 A of upper side frame parts and 33 C of lower side frame parts are equipped with the shaft fitting part E worn by a valve body pivot, and are provided with the opening L for air distribution | circulation.

The pressure relief valve V1 and the outside air introduction valve V2 are configured by assembling a valve body 36 having a pivotal shaft portion 36a at the upper end to the upper frame portion 33A and the lower frame portion 33C of the valve mounting frame 33. Yes. That is, the pivot shaft part 36a in the valve body 36 is fitted to the shaft fitting part E worn by the valve body pivot in the upper frame part 33A and the lower frame part 33C, and the valve body 36 is fitted to the upper frame part 33A. And it is in the state which is mounted in 33 C of lower side frame parts, and the opening L for air distribution is closed.
The pressure relief valve V1 and the outside air introduction valve V2 configured as described above are provided in a state in which the valve body 36 is closed and biased because the valve body 36 closes the air circulation opening L with its own weight.

As shown in FIG. 8, the pressure relief valve V1 has a pressure in the cleaning space Q introduced into the communication space portion U1 via the communication hole 32, for valve mounting via the external communication cylinder portion 31A. When the pressure exceeds a set pressure higher than the external pressure (atmospheric pressure) introduced into the space U2, the pressure difference is opened, and automatic adjustment is performed so that the internal pressure of the cleaning space Q becomes the external pressure.
In addition, as shown in FIG. 9, the outside air introduction valve V2 has a pressure in the cleaning space Q introduced into the communication space portion U1 through the communication hole 32 for valve mounting through the external communication cylinder portion 31A. When the set pressure is lower than the set pressure outside the machine external pressure (atmospheric pressure) introduced into the space U2, it is opened by the pressure difference and automatically adjusted so that the internal pressure of the cleaning space Q becomes the machine external pressure.

As shown in FIGS. 4 and 5, the external communication cylinder portion 31 </ b> A of the casing 31 is connected to the water level sensor J in communication.
That is, as shown in FIGS. 12 to 14, the water level sensor J includes a hot water storage body 41 assembled in the cleaning tank D and a detection unit 42 that detects the water level of the hot water stored in the storage body 41. Yes.
The hot water storage body 41 includes a tube mounting cylinder portion 41A as a communicating portion communicating with the inside of the cleaning space Q on the bottom side, and the guide tube extending from the water storage recess S of the cleaning space Q to the tube mounting cylinder portion 41A. 13 is connected.
Moreover, the hot water storage body 41 is equipped with the air release cylinder part 41B as an air release part for air release in the state which protrudes upwards.

Furthermore, a fitting cylinder part 41C into which the external communication cylinder part 31A of the casing 31 is fitted is provided at the upper part of the hot water storage body 41, and the external communication cylinder of the casing 31 is provided in this fitting cylinder part 41C. The portion 31A is fitted and connected.
Therefore, the casing 31 is configured to communicate with an upper side portion of the hot water storage body 41 that is open to the atmosphere and to communicate with the outside of the machine via the hot water storage body 41.
Thus, since the casing 31 communicates with the hot water storage body 41 of the water level sensor J, when dew condensation occurs inside the valve mounting space portion U2, the dew condensation water becomes the hot water storage body 41 of the water level sensor J. It will be discharged inside.

  The detection unit 42 of the water level sensor J is supported by a floating body 42 </ b> A supported so as to be movable up and down inside the hot water storage body 41, and is pivotally supported by the upper part of the hot water storage body 41 so as to swing up and down. The photo-interrupter type first optical sensor that is shielded from light by the operation unit provided in the floating body 42A when a set amount of water is supplied to the cleaning space Q in the cleaning tank D during the cleaning operation or the like. 42C (see FIG. 13), and a photointerrupter type second optical sensor 42D (see FIG. 14) that is shielded by the detection body 42B when water is discharged from the cleaning space Q in the cleaning tank D in the cleaning operation or the like. ).

[Another embodiment ]

( 1 ) In the above embodiment, in the cleaning process and the rinsing process, the case where the cleaning water and the rinsing water are heated by the electric heater is exemplified, but the hot water is supplied from the external water heater to Even if the heater of the formula is omitted, washing with warm water in the washing process and rinsing with warm water in the rinsing process can be performed.

( 2 ) In the above embodiment, in the rinsing operation, the rinsing operation is performed a plurality of times, and then the finishing rinsing operation is performed. However, the number of rinsing operations can be appropriately changed. For example, the rinsing operation is performed. It is also possible to perform the finish rinsing operation from the beginning without performing it.

( 3 ) In the above embodiment, in the drying operation, the case where the air circulated by the electric heater as the heating means is exemplified, but the circulated air is not heated by the heating means. So good. In other words, the electric motor provided in the circulation fan as the ventilation means generates heat with its operation, and the circulated air is heated by the generated heat, so it is not equipped with special heating means. A drying operation may be performed.
In addition, when heating the circulated air, the specific configuration for heating can be changed in various ways, such as arranging the heating means in the ventilation path.

( 4 ) In the above embodiment, an example in which the present invention is applied to a drawer type dishwasher has been described. However, the present invention can also be applied to a dishwasher other than the drawer type dishwasher. For example, the present invention is applied to a dishwasher having a configuration in which a washing tank is housed in a main body of a dishwasher and a front wall portion of the main body is configured to be openable and closable with respect to the main body. May be.

DESCRIPTION OF SYMBOLS 21 Air supply port 22 Air suction port 23 Ventilation means 31 Casing 41 Hot water storage body 41A Communication part 41B Atmospheric release part 42 Detection part D Space formation member F Ventilation path f1 Ascending path part f2 Descent path part G Dehumidification part H Control means J Water level Detection means Q Cleaning space V1 Pressure relief valve V2 Outside air introduction valve W Pressure adjustment means

Claims (2)

Control means is provided for performing a cleaning process for cleaning a cleaning object in a freely openable and closable cleaning space, a rinsing process for the cleaning object, and a drying process for drying the cleaning object,
Ventilation means for circulating air in the cleaning space through a ventilation path extending from an air suction port to the cleaning space and an air supply port to the cleaning space, and a dehumidifying unit for dehumidifying the air circulated through the ventilation path Provided,
In the drying process, the control means is a dishwasher configured to control the operation of the ventilation means and the dehumidifying unit so as to circulate while dehumidifying the air in the cleaning space,
Pressure adjusting means for automatically adjusting the internal pressure of the cleaning space in the closed state to be the external pressure of the machine is provided ,
When the internal pressure of the cleaning space becomes higher than the external pressure of the pressure adjustment means, the pressure adjusting means is opened by the pressure difference and communicates the cleaning space with the outside of the device, and the cleaning space When the internal pressure of the machine is lower than the external pressure of the machine, it is opened by the pressure difference and is provided with a closed biased outdoor air introduction valve that communicates the cleaning space with the outside of the machine,
The pressure adjusting means is formed in a unit shape including the pressure relief valve and the outside air introduction valve,
The pressure adjusting means formed in a unit shape is assembled to the space forming member that forms the cleaning space,
The water level detection means for detecting the level of hot water stored in the lower part of the cleaning space comprises a communication part communicating with the inside of the cleaning space on the lower part side and an air release part for opening the atmosphere on the upper side. Comprising a hot water reservoir and a detector for detecting the level of hot water stored in the reservoir,
The pressure adjusting means is formed in a state including the pressure relief valve and the outside air introduction valve in a casing that communicates with the inside of the cleaning space and communicates with an upper side portion of the hot water storage body,
The dishwasher provided in the upper side of the hot water storage body so that the casing communicating with the upper side portion of the hot water storage body returns the condensed water generated therein to the inside of the hot water storage body . The air suction port and the air supply port are formed at lower positions in the side wall portion of the cleaning space,
The ventilation path is formed in an inverted U shape including an ascending path portion extending upward from the air suction port and a descending path portion extending downward from the upper end portion of the ascending path portion toward the air supply port. dishwashing machine according to claim 1, which is.

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