JP4226382B2 - Washing dryer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a washing / drying machine for washing and drying instruments such as a beaker, a flask, a graduated cylinder, and a test tube, or for washing and drying dishes and the like.
[0002]
[Prior art]
The instrument washer accommodates a bowl-shaped rack containing laboratory instruments such as a beaker and a flask in a washing chamber, supplies water into the washing chamber, accumulates water at the bottom of the washing chamber, and supplies the water by a circulation pump. It has the structure which sends out to the nozzle arm which provided the small diameter water-injection hole with plural numbers, and wash | cleans and rinses the said instruments by vigorously injecting water from a water-injection hole. The water sprayed from the water injection holes and hitting the appliances and the wall of the cleaning chamber flows down to the bottom of the cleaning chamber, and is sucked again by the circulation pump and used in a circulating manner.
[0003]
In such an instrument washer, when cleaning instruments having a narrow mouth and a large internal volume, such as a round bottom flask and an Erlenmeyer flask, water hardly reaches the interior of the instrument only with water sprayed from the nozzle arm as described above. Therefore, a dedicated rack provided with a dedicated nozzle that directly injects water into each instrument has been conventionally used (see, for example, Patent Document 1 and Non-Patent Document 1).
[0004]
That is, as shown in FIG. 7, a water conduit 101 is disposed at the bottom of a bowl-shaped rack (referred to as a jet rack in Non-Patent Document 1) 100. An injection nozzle 102 protruding upward is formed at the location, and an injection pipe 103 of various lengths is attached to the injection nozzle 102 as necessary. Further, a holder 104 is attached to the injection pipe 103 as necessary. Then, the instrument G having a small mouth such as a round bottom flask is inserted so as to cover the injection pipe 103 with the mouth facing downward as shown in the figure, and the end of the mouth is held in contact with the holder 104. The
[0005]
In this configuration, when water is pumped to the water guide pipe 101 during the cleaning operation, water blows up from the water injection hole at the upper end of the injection pipe 103 and water is applied to the inner surface of the instrument G. On the other hand, the outer surface of the instrument G is washed with water sprayed from a conventional nozzle arm. Thereby, both the inner surface and the outer surface of the instrument G are reliably washed with water and cleaned.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-180212 (paragraph 0022, FIG. 2)
[Non-Patent Document 1]
“Jet-type instrument washer” “Accessories for jet racks”, [online], Sanyo Biomedical Co., Ltd., [Search April 17, 2003], Internet, <URL: http: //www.sanyo-biomedical .co.jp / kokunai / index.htm>
[0007]
[Problems to be solved by the invention]
However, when drying is performed following cleaning with such an instrument washer, even if heated air is sent into the cleaning chamber, the air inside the instrument G arranged as shown in FIG. Moisture adhering to is difficult to evaporate. Moreover, even if the temperature of the instrument G rises and the water adhering to the inner surface of the instrument G once evaporates, the water vapor does not escape from the interior of the instrument G. There arises a problem that moisture is deposited again due to condensation.
[0008]
Conventionally, in the drying operation, heated air is supplied instead of water into the water conduit 101 during the drying operation, and the heated air is jetted into the appliance G from the upper end of the injection pipe 103 and directed downward of the appliance G. 2. Description of the Related Art There is known an appliance cleaning machine configured to introduce heated air into a cleaning chamber through a route in which heated air flows out from the mouth into the cleaning chamber.
[0009]
However, in such a configuration, it is inevitable that a certain amount of water remains in the water guide pipe 101 at the time when the cleaning operation is completed. Therefore, the heated air introduced into the water guide pipe 101 during the drying operation is first in the water guide pipe 101. In order to evaporate the remaining water, heat is taken away, and it is difficult to send sufficiently high-temperature air to the cleaning chamber at the beginning of the drying operation. Moreover, since the air blown out from the injection pipe 103 is initially moist with water vapor, the inside of the appliance G cannot be efficiently dried. Furthermore, since the flow resistance to the cleaning chamber is large, it is difficult to increase the amount of air blown to the cleaning chamber in the first place, and the outside of the instrument is difficult to dry. For these reasons, the drying efficiency is not so good, and the time required for drying the appliance G may be increased.
[0010]
Moreover, in the appliance washer that stores water at the inner bottom of the cleaning chamber as described above, a heater for water heating is provided at the bottom of the cleaning chamber to heat the stored water during the cleaning operation. In order to supply heated air to the water conduit 101, a heater for air heating must be provided in addition to the heater for water heating, and the installation of two heaters increases the cost.
[0011]
The present invention has been made in view of such a problem, and its main object is to use, for example, a flask while combining a water heating heater used during a washing operation and an air heating heater used during a drying operation. It is an object of the present invention to provide a washing and drying machine that can efficiently dry a device having a small mouth. In this specification, the appliances are particularly described. However, the same problem occurs with tableware, for example, tableware with a small mouth and a relatively large internal volume.
[0012]
[Means for solving the problems and effects]
The present invention, which has been made to solve the above-mentioned problems, includes a cleaning / drying chamber, and the object to be cleaned with the mouth facing downward in order to clean the inside of the object having a small mouth in the cleaning / drying chamber. In a washing / drying machine comprising: a nozzle into which water is inserted; and a pump for feeding water to the nozzle to spray water from the water spray hole of the nozzle,
a) a blowing means for sending drying air into the washing and drying chamber during drying operation;
b) an exhaust branch pipe connected in the middle of the water supply pipe from the pump to the nozzle, the other end communicating with the outside of the machine;
c) a pipe opening / closing means for closing the branch pipe at least when the pump is operated and opening the pipe during the drying operation;
And during the drying operation, the air blowing means is operated to send air into the cleaning / drying chamber so that the air pressure in the chamber is higher than the atmospheric pressure outside the apparatus, thereby conversely to the cleaning / drying chamber. The air flow into the nozzle through the water injection hole is generated, and the air flow is discharged to the outside through the branch pipe.
[0013]
In the washing / drying machine according to the present invention, the air to be washed is inserted with the mouth facing downward by making the air pressure inside the washing / drying chamber higher than the air pressure outside the machine during the drying operation. A spontaneous air flow due to a pressure difference between both ends is generated in the communication path including the nozzle and the branch pipe. In order to make the air pressure in the cleaning / drying chamber higher than the atmospheric pressure outside the apparatus, a blowing unit that can secure a larger blowing flow rate than an exhaust flow rate through an exhaust port provided in the cleaning / drying chamber may be used. As a result, for example, the object to be cleaned has a small mouth such as a round bottom flask or a bottle of sake, but even if the inner volume is a relatively large container, the washing / drying chamber side, i.e. Air flows from the outer surface side to the inner surface side, and the inflowed air is sucked into the nozzle through, for example, a water injection hole formed in an upper end portion of a standing tubular nozzle. Accordingly, the flow of air passing through the mouth of the container is smooth because it is in one direction from the outer surface side to the inner surface side, and the air in the container changes without stagnation.
[0014]
As described above, according to the washing / drying machine according to the present invention, since the drying air circulates in the appliance or tableware having a small mouth as described above, the water adhering to the inside can be quickly evaporated. it can. Further, since the evaporated water vapor is quickly removed from the inside of the utensil or tableware, even if the temperature is lowered after the drying operation is completed, water does not reattach to the inside of the utensil or tableware due to condensation. Thereby, the inside of such an instrument or tableware can be efficiently dried. Further, since the outside air dried by the air blowing means is smoothly sent into the washing and drying chamber, the outside of the utensil and tableware is also efficiently dried. Furthermore, even when water droplets remain in the nozzle or the water supply pipe, the air that passes through these parts during the drying operation is air that has already been used for drying after passing through the washing and drying chamber. Therefore, the drying efficiency is not adversely affected.
[0015]
As a preferred embodiment of the washing / drying machine according to the present invention, the pump sucks water stored in the bottom of the washing / drying chamber and sends it to the nozzle, and stores the water in the bottom of the washing / drying chamber. It is preferable that a heating unit that serves both for water heating during the cleaning operation and for air heating during the drying operation is disposed at the immersion position.
[0016]
In this configuration, the air sent into the cleaning / drying chamber by the blowing means during the drying operation is heated by the heating means to dry the outer surfaces of the utensils and tableware accommodated in the cleaning / drying chamber, and at least one of the heated air. As described above, the part is sucked into the nozzle, so that the inside of a small-mouthed instrument or tableware can be surely dried. Since the water heating heater at the time of the cleaning operation and the air heating heater at the time of the drying operation can be used in combination, the cost can be reduced and the space for installing the heater can be reduced. It is possible to increase the capacity of objects to be cleaned.
[0017]
Moreover, in the washing / drying machine according to the present invention, the pipe opening / closing means closes the branch pipe by the pressure of water sent to the water pipe by the operation of the pump, and the pressure of the water is released. Sometimes, it can be configured to be an on-off valve that opens spontaneously.
[0018]
According to this configuration, it is not necessary to use a part that requires electrical control such as an electromagnetic valve as the pipe opening / closing means, which contributes to cost reduction and avoids complicated electrical circuits. There is also an advantage that it is not necessary to change a control program such as a microcomputer.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an instrument washer / dryer according to an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a front external view of the instrument washer / dryer of this example, FIG. 2 is a schematic diagram showing the internal configuration of the instrument washer / dryer of this example, and FIG. 3 is an electrical system of the instrument washer / dryer of this example. It is a block block diagram of the principal part. Note that FIG. 2 shows the main parts in an expanded manner so that the internal configuration can be easily understood, and does not necessarily show a cross-sectional view of the present apparatus.
[0020]
As shown in FIG. 1, the instrument washer / dryer 1 of the present embodiment has a box-shaped casing 2, and a door 3 for opening and closing a front opening of a later-described washing / drying chamber 10 on the front surface thereof, When opened, it is provided so as to fall to the near side about the horizontal axis at the lower end. A latch 4 for manual operation when the door 3 is opened is provided on the upper portion of the door 3, and the latch 4 also functions as a door switch for detecting opening / closing of the door 3. A display panel 5 including an LED display is provided on the left side of the central portion of the door 3, and an operation panel 6 including a plurality of operation keys is provided on the right side thereof. Further, a transparent window 7 is provided below the door 3 so that the inside of the cleaning / drying chamber 10 can be seen.
[0021]
A cleaning / drying chamber 10 as shown in FIG. 2 is installed inside the housing 2. When the door 3 is opened as described above, the front opening of the cleaning / drying chamber 10 is largely opened. In the cleaning / drying chamber 10, a bowl-shaped upper rack UR and lower rack DR in which instruments are accommodated are installed at predetermined positions in two upper and lower stages, and both racks UR, DR are located on the front side with the door 3 opened. It is possible to slide. Each of the upper and lower racks UR and DR has a water conduit 101 and an injection pipe 103 provided upright from the water conduit 101 as shown in FIG. Is accommodated so as to cover the injection pipe 103 with its mouth facing downward. In FIG. 2 and FIGS. 5 and 6 described later, only one injection pipe 103 and appliance G are shown in each rack to avoid complication. However, as shown in FIG. A plurality of injection pipes 103 are provided along the same, and the appliance G can be attached to each injection pipe 103. Further, the shape and orientation of the injection pipe 103 can be changed as appropriate, for example, obliquely upward, depending on the shape of the object to be cleaned.
[0022]
A water storage tank 11 is disposed in the inner bottom portion of the cleaning / drying chamber 10 so as to be recessed one step lower, and a mesh-like filter 12 for collecting solids that have flowed down from the instruments is detachable on the upper surface of the water storage tank 11. Is provided. The water storage tank 11 is connected to a suction port of a circulation pump 14 by a suction pipeline 13, and a circulation pipeline that branches into two of a lower circulation pipeline 15a and an upper circulation pipeline 15b at a discharge port of the circulation pump 14. 15 is connected. The water storage tank 11 is connected to a suction port of a drainage pump 17 by a discharge pipe 16, a drainage hose 18 is connected to a discharge port of the drainage pump 17, and the other end of the drainage hose 18 is not shown in the drawing. To drainage ditch etc.
[0023]
A lower nozzle arm 19 that is rotatable in a substantially horizontal plane is disposed at the bottom of the washing and drying chamber 10, and a plurality of water injection holes 19a are formed on the upper surface thereof. Water is fed to the lower nozzle arm 19 through the lower circulation pipe 15a. In addition, a connecting pipe 20 is provided at the upper part of the rotation shaft at the substantially center of the nozzle arm 19, and when the lower rack DR is set at a predetermined position as shown in the drawing, the lower circulation pipe 15a is connected via the connecting pipe 20. And the water guide pipe 101 of the lower rack DR are connected.
[0024]
On the other hand, at the lower part of the upper rack UR, similarly to the lower nozzle arm 19, there is provided an upper nozzle arm 21 that is rotatable in a substantially horizontal plane and has a plurality of water injection holes 21a on the upper surface. A water supply shaft 22 is erected substantially at the center of the upper nozzle arm 21, and when the upper rack UR is set at a predetermined position as shown in the drawing, the upper end of the water supply shaft 22 is the inner top of the cleaning / drying chamber 10. It connects with the upper water supply port 23 provided in the surface, and is comprised so that the upper circulation conduit 15b and the water conduit 101 of the upper stage rack UR may be connected by it. Part of the water injection holes 19a and 21a is formed to inject water in an oblique direction, and the nozzle arms 19 and 21 are rotated by the reaction of the water injection.
[0025]
A loop-shaped heater 24 is disposed at a position lower than the water level stored in the cleaning / drying chamber 10 at the inner bottom of the cleaning / drying chamber 10 during the cleaning operation, and stored in the bottom of the cleaning / drying chamber 10. By heating the water, the cleaning effect and the rinsing effect can be enhanced. The heater 24 also serves as a heating means for heating the air in the cleaning / drying chamber 10 during the drying operation. An exhaust port 25 for discharging the air in the cleaning / drying chamber 10 to the outside is provided in the upper portion of the cleaning / drying chamber 10. Further, a blower port 26 is provided in the lower portion of the side wall of the cleaning / drying chamber 10, and the blower port 27 is connected to the suction port 30 opened to the outside of the machine. A fan 28 that is rotationally driven by a fan motor 29 is installed in the air duct 27, and when the fan 28 is driven, outside air sucked from the air inlet 30 flows from the air outlet 26 to the bottom of the washing / drying chamber 10. It is blown out toward.
[0026]
As described above, in the middle of the upper circulation line 15 connecting the discharge port of the circulation pump 14 and the upper water supply port 23, the sub exhaust line 31 having the other end opened toward the outside of the machine is a branch pipe in the present invention. The auxiliary exhaust pipe 31 is provided with a water blocking valve 32 as the pipe opening / closing means in the present invention.
[0027]
As shown in FIG. 4 (a), the auxiliary exhaust pipe 31 is inclined upward from the washing / drying chamber 10 side toward the outside of the machine, and the valve is freely pivotable about a shaft 32a horizontal on the upper wall thereof. A body 32b is attached. In addition, a valve seat 32 c is provided at a predetermined position on the lower wall of the sub exhaust pipe 31. The valve body 32b is made of a member having an appropriate weight, such as metal, and the air pressure in the cleaning / drying chamber 10 becomes higher than the atmospheric pressure outside the apparatus as will be described later. Even when an air flow toward the outside of the machine is generated, the weight of the valve body 32b is superior to the pressing force of the air flow, and the valve body 32b does not contact the valve seat 32c as shown in FIG. Thereby, the sub exhaust line 31 is maintained in an open state.
[0028]
On the other hand, when water is supplied to the upper circulation pipe 15b and the sub exhaust pipe 31 is filled with water during a cleaning operation described later, the pressing force by the water is increased by the air flow as described above. Since it is much larger than the pressure, as shown in FIG. 4C, the valve body 32b is pushed by water and comes into contact with the valve seat 32c. As a result, the sub-exhaust pipe line 31 is closed, and water can be prevented from flowing out of the machine outside the water blocking valve 32.
[0029]
Next, the configuration of the electrical system of the appliance washer / dryer will be described with reference to FIG. The control unit 40 is mainly configured by a microcomputer, and performs each control operation related to the cleaning operation and the drying operation by executing a control program stored in the internal ROM in advance. The control unit 40 receives a key input signal from an operation unit 6a provided on the operation panel 6, and also detects a water level sensor (or simply detects a predetermined water level) inside the cleaning / drying chamber 10. Detection signal) 42, a temperature sensor 43 for detecting the temperature of the stored water or the temperature of the air in the cleaning / drying chamber 10 when the heater 24 is operated, and the like. The control unit 40 circulates via the load driving unit 41 in addition to outputting a display control signal for performing a display or the like for monitoring the progress of the cleaning operation on the display unit 5 a provided in the display panel 5. Control signals for controlling operations of the pump 14, the drainage pump 17, the heater 24, the fan motor 29, the water supply valve 44, and the like are output.
[0030]
Subsequently, regarding the operation of the appliance cleaning dryer of the present embodiment, the operation during the cleaning operation will be described with reference to FIG. When the cleaning operation is started in response to a key input signal from the operation unit 6a, the control unit 40 first opens the water supply valve 44 and introduces tap water into the cleaning / drying chamber 10 to a specified water level. Then, by energizing the heater 24, the water stored in the cleaning / drying chamber 10 is appropriately warmed, and the circulation pump 14 is operated.
[0031]
When the circulation pump 14 is actuated, as shown by an arrow in FIG. 5, the water in the water storage tank 11 is sucked into the circulation pump 14 through the suction pipe 13 and discharged to the circulation pipe 15 with a high water pressure. The The discharged water reaches the lower and upper nozzle arms 19 and 21 through the lower circulation line 15a and the upper circulation line 15b, respectively, and part of the water is branched to cause upper and lower racks DR and UR. Is fed into the water conduit 101. Then, water is ejected from the water ejection holes 19a and 21a of the nozzle arms 19 and 21, and the dirt strikes mainly the outer surface of the appliance G accommodated in the lower rack DR and the upper rack UR to remove dirt. At this time, the nozzle arms 19 and 21 are rotated by the momentum of water injection, so that the water is evenly distributed over the outer surfaces of the instruments mounted on the upper and lower racks UR and DR.
[0032]
On the other hand, the water supplied to the water guide pipes 101 in the upper and lower racks UR and DR is ejected from the water injection hole at the upper end of the injection pipe 103 and hits the inner surface of the appliance G to remove dirt. Therefore, since the device G is splashed with water from both the outer surface and the inner surface, the device G is uniformly and thoroughly cleaned. The water hitting the appliance G and the inner wall of the cleaning / drying chamber 10 flows down to the bottom of the cleaning / drying chamber 10, is removed by collecting solids by the filter 12, flows into the water tank 11, and circulates again. Suction is performed by the pump 14. Thus, the water stored in the washing / drying chamber 10 is used cyclically.
[0033]
As described above, when the circulation pump 14 operates, the water pumped to the upper circulation line 15b also flows into the auxiliary exhaust line 31, but as described with reference to FIG. Since the pipe line of the path 31 is closed, it is possible to prevent water from leaking out of the machine, and the pumping pressure of water in the upper circulation pipe line 15b is not reduced.
[0034]
Detergent water is used as stored water at the time of cleaning, and mere tap water is used at the time of rinsing after the cleaning is completed, but the basic water jetting operation is the same at the time of cleaning and rinsing. When the stored water in the cleaning / drying chamber 10 is discharged to the outside of the apparatus after the cleaning or rinsing is completed, the circulation pump 14 is stopped and the drainage pump 17 is operated. Then, the water accumulated in the water storage tank 11 is sucked into the drainage pump 17 through the discharge pipe 16 and is pumped to the discharge port. Therefore, by operating the drain pump 17 for a predetermined time, the water accumulated at the bottom of the cleaning / drying chamber 10 can be discharged out of the apparatus.
[0035]
Next, the operation during the drying operation will be described with reference to FIG. When the above draining operation is completed, water that cannot be discharged remains in the bottom of the water storage tank 11 or the inside of the suction pipe 13, but the water in the circulation pipes 15a and 15b is drawn. (Water droplets or the like can remain), and the upper and lower racks UR and DR, the conduit pipe 101, the circulation pipes 15a and 15b, and the auxiliary exhaust pipe 31 are completely secured as air flow paths.
[0036]
When the drying operation is started, the control unit 40 drives the fan motor 29 to rotate the fan 28 and starts energizing the heater 24. The outside air is supplied into the cleaning / drying chamber 10 through the air duct 27 by the operation of the fan 28. Since the blower opening 24 is provided in the lower part of the washing / drying chamber 10, the sent cold outside air is immediately heated by the heater 24, and becomes dry heated air, which rises in the washing / drying chamber 10. At that time, heat exchange with water adhering to the appliance G, the washing / drying chamber 10 and the like is performed, and such water is evaporated. By the operation of the fan 28, the outside air is continuously supplied into the cleaning / drying chamber 10, and the moist air including the evaporated water vapor is discharged to the outside through the upper exhaust port 25.
[0037]
Here, the air flow rate (air blowing capacity) of the fan 28 is determined to be appropriately larger than the exhaust air flow rate through the exhaust port 25. Therefore, at the beginning of the drying operation, the air pressure in the cleaning / drying chamber 10 is substantially the same as the atmospheric pressure (air pressure outside the apparatus), but the air pressure in the cleaning / drying chamber 10 gradually increases. Since the water blocking valve 32 is in an open state as described above, the inside of the cleaning / drying chamber 10 and the outside of the apparatus are a communication line composed of the injection pipe 103, the water conduit 101, the circulation pipes 15 a and 15 b, and the auxiliary exhaust pipe 31. It communicates through the passage. When the air pressure is higher at the cleaning / drying chamber 10 side than the outside of the machine at both ends of the communication path, an air flow that flows from the cleaning / drying chamber 10 to the outside of the machine through the communication path is spontaneously generated. (See arrow in FIG. 6). At this time, the flow rate of the air flowing out of the machine through the auxiliary exhaust pipe 31 is not only the air pressure in the cleaning / drying chamber 10 but also a parameter related to the flow resistance of the communication path, such as the inner diameter and length of the pipe Dependent.
[0038]
As described above, the apparatus G passes through the mouth from the outer surface side of the apparatus G around the apparatus G such as a flask in the washing / drying chamber 10 and the mouth held downward by the air flow generated by the difference in air pressure. Heated air flows into the inner surface, and the heated air flows from the injection pipe 103 to the water conduit 101 through the injection hole at the upper end of the injection pipe 103, contrary to the water ejection path. That is, since dry heated air continuously flows into the inner surface of the appliance G, water adhering to the inner surface of the appliance G evaporates by heat exchange with the heated air, and the heated air is accompanied by the water vapor. It is sucked into the injection pipe 103. Therefore, the heated air surely flows into the inner surface of the appliance G, and the heated air is continuously exchanged without staying inside the appliance G, so that the water adhering to the inner surface of the appliance G quickly evaporates. It is carried away outside the plane.
[0039]
Further, in this embodiment, even when water droplets or the like remain inside the water conduit 101 or the circulation pipes 15a and 15b, the air flowing through these has already passed through the cleaning / drying chamber 10 Therefore, there is no adverse effect on the drying of the instruments and the like housed in the cleaning / drying chamber 10. Further, as described above, the heated air discharged to the outside of the apparatus through the auxiliary exhaust pipe 31 is a part of the air that is sent in a large amount into the cleaning / drying chamber 10. A large air flow rate can be secured to achieve high drying efficiency.
[0040]
In this way, even if the device has a small mouth and a large internal volume, such as a round bottom flask, both the outer and inner surfaces are quickly dried, and other devices such as beakers and petri dishes are also used. It can be dried efficiently.
[0041]
In the above embodiment, the water blocking valve 32 is closed by the pressure of the water pumped when the circulation pump 14 is operated. However, a control signal like a solenoid valve is used to close the pipe more securely. It is good also as a structure which opens and closes actively. In that case, for example, when the circulation pump 14 is operated as in a cleaning operation, the sub-exhaust pipe 31 may be closed, and in other cases, the solenoid valve may be controlled so as to open the pipe. Even in a configuration in which such electrical control is not performed, the open state is not maintained using the weight of the valve body 32b, but the open state or the closed state is used using appropriate biasing means such as a spring. It is good also as a structure to achieve.
[0042]
Moreover, since the said Example is only an example of this invention, it is clear that a deformation | transformation, correction, and addition can be suitably performed in the range of the meaning of this invention except the point of the said description. For example, although the said Example is an example of an appliance washing dryer, it is natural that this invention is applicable to the tableware washing dryer which has a similar structure. Of course, there is no limit on the number of racks.
[Brief description of the drawings]
FIG. 1 is a front external view of an appliance washing / drying machine according to an embodiment of the present invention.
FIG. 2 is a schematic diagram showing the internal configuration of the appliance washer / dryer of the present embodiment.
FIG. 3 is a block diagram of the main part of the electrical system of the appliance washer / dryer of the present embodiment.
FIG. 4 is a schematic view showing a configuration of a water blocking valve in the appliance washer / dryer of the present embodiment.
FIG. 5 is a diagram showing a state of water movement during a cleaning operation in the appliance washer / dryer of the present embodiment.
FIG. 6 is a diagram showing a state of air flow during a drying operation in the appliance washer / dryer of the present embodiment.
FIG. 7 is a schematic diagram showing the configuration of a rack that has been conventionally used when cleaning an instrument such as a flask.
[Explanation of symbols]
1… Equipment washing dryer
2 ... Case
3 ... Door
10 ... Washing and drying room
11 ... Water tank
13 ... Suction line
14 ... circulation pump
15 ... circulation line
15a ... Lower circulation line
15b ... Upper circulation line
16 ... discharge line
19 ... Lower nozzle arm
19a, 21a ... water injection hole
20 ... Connecting pipe
21 ... Upper nozzle arm
22 ... Water supply shaft
23 ... Upper water inlet
24 ... Heater
24 ... Blower
25 ... Exhaust port
26 ... Blower
27 ... Air duct
28 ... Fan
29 ... Fan motor
30 ... Inlet
31 ... Sub exhaust line
32 ... Water blocking valve
32a ... axis
32b ... Valve body
32c ... valve seat
DR ... Lower rack
UR ... Upper rack
101 ... water conduit
102: Injection nozzle
103 ... injection pipe
104 ... Retaining tool
G ... Apparatus (round bottom flask)

Claims (3)

A cleaning / drying chamber, a nozzle into which the object to be cleaned is inserted with the mouth facing downward to clean the inside of the object having a small mouth in the cleaning / drying chamber, and a water injection hole of the nozzle A washing and drying machine comprising a pump for feeding water to the nozzle to inject water,
a) a blowing means for sending drying air into the washing and drying chamber during drying operation;
b) an exhaust branch pipe connected in the middle of the water supply pipe from the pump to the nozzle, the other end communicating with the outside of the machine;
c) a pipe opening / closing means for closing the branch pipe at least when the pump is operated and opening the pipe during the drying operation;
And during the drying operation, the air blowing means is operated to send air into the cleaning / drying chamber so that the air pressure in the chamber becomes higher than the atmospheric pressure outside the apparatus, thereby conversely to the cleaning / drying chamber. A washing and drying machine that generates an air flow that flows into the nozzle through the water injection hole and is discharged to the outside through the branch pipe. The pump sucks the water stored at the bottom of the cleaning / drying chamber and sends it to the nozzle. The washing / drying machine according to claim 1, further comprising a heating means which also serves as an air heater. The pipe opening / closing means is an opening / closing valve that closes the branch pipe by the pressure of water sent to the water supply pipe by the operation of the pump and opens spontaneously when the water pressure is released. The washing / drying machine according to claim 1.

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