JP2018198742A - Mixing chamber for automatic granular detergent feeder and automatic granular detergent feeder - Google Patents

Abstract

To provide a mixing chamber for an automatic granular detergent feeder in which a granular detergent is hard to deposit in an inner circumferential surface.SOLUTION: A mixing chamber for an automatic granular detergent feeder for use in the automatic granular detergent feeder includes: a hopper for reserving a granular detergent; a detergent supply part provided under the hopper, and having the granular detergent being sent from the hopper; and a mixing chamber for mixing the granular detergent supplied from the detergent supply part with water and making detergent water solution or a mixture of the granular detergent and the water. The mixing chamber for the automatic granular detergent feeder is characterized in that the mixing chamber comprises a mixing chamber upper part with a detergent inlet opening where the granular detergent is charged from the detergent supply part and a mixing chamber lower part for mixing the granular detergent charged in the mixing chamber upper part with the water, and an inversely tapered columnar cavity in which a cross section in a direction being substantially vertical to a direction where the granular detergent passes is the narrowest in the detergent inlet opening and is consecutively spread toward the mixing chamber lower part is formed in the mixing chamber upper part.SELECTED DRAWING: Figure 1

Description

The present invention relates to a mixing chamber for a powder detergent automatic supply device and a powder detergent automatic supply device.

Conventionally, various techniques for automatically supplying a granular detergent used for cleaning have been developed in order to automate a cleaning operation in an automatic dishwasher or the like.

In Patent Document 1, a hopper that stores a certain amount of granular detergent, a detergent supply unit that supplies a predetermined amount of granular detergent from the hopper, and a granular detergent supplied from the detergent supply unit are mixed with water. And a mixing chamber for producing a detergent aqueous solution, and an automatic powder detergent supply device for supplying a detergent aqueous solution or a mixture of detergent and water from the mixing chamber into a washing tank is disclosed.

In the mixing chamber, both the moisture and the granular detergent are present, so that the granular detergent is likely to adhere to the inner peripheral surface of the mixing chamber. When the granular detergent adheres to the inner peripheral surface of the mixing chamber, the granular detergent further adheres on the fixed granular detergent, and the mixing chamber may be clogged, resulting in a supply failure.
Therefore, in the powder detergent automatic supply device of Patent Document 1, a scraping bar is provided along the inner peripheral surface of the mixing chamber, and adheres to the inner peripheral surface of the mixing chamber by the scraping bar by the rotation of the driven gear. It is said that poor supply can be prevented by scraping the powdered detergent.

JP 2008-246072 A

In Patent Document 1, a “scraping bar” is provided as a member for scraping the granular detergent adhering to the inner peripheral surface of the mixing chamber.
If the inner peripheral surface of the mixing chamber comes into contact with the scraping bar, the driven gear is prevented from rotating, and the inner peripheral surface of the mixing chamber or the scraping bar is damaged. Between the bars, there is provided as much space as necessary for the scraping bar to rotate smoothly. The granular detergent may accumulate in this space and stick.
One end of the scraping bar is connected to the tooth tip of the driven gear, and the other end is a free end. For this reason, the strength of the scraping bar is not strong, and the strength of the scraping bar is lost with respect to the granular detergent adhered to the inner peripheral surface of the mixing chamber, and the free end side of the scraping bar is inclined (the inner peripheral surface of the mixing chamber). May be deformed). As a result, the granular detergent sometimes accumulates thicker than the thickness of the space between the inner peripheral surface of the mixing chamber and the scraping bar.

The present invention has been made to solve the problems of the above-described conventional powder detergent automatic supply device, and has a mixing chamber for a powder detergent automatic supply device in which powder detergent is difficult to deposit on the inner peripheral surface. The purpose is to provide.

As a result of intensive studies to solve the above problems, the present inventors have made it difficult for the granular detergent to deposit on the inner peripheral surface of the mixing chamber by making the internal shape of the mixing chamber an inverted tapered columnar shape (tapered shape). As a result, the present invention has been conceived.

That is, the mixing chamber for the powder detergent automatic supply device according to the present invention includes a hopper that stores the powder detergent, a detergent supply unit that is provided under the hopper, and to which the powder detergent is sent from the hopper, and the detergent supply. A powder detergent detergent automatic supply device used in a powder detergent automatic supply device, comprising a mixing chamber that mixes powder detergent and water supplied from a section with water to form a detergent aqueous solution or a mixture of powder detergent and water The mixing chamber is for mixing the upper part of the mixing chamber provided with a detergent inlet into which the granular detergent is introduced from the detergent supply unit, and the granular detergent introduced into the upper part of the mixing chamber with water. The upper part of the mixing chamber has a cross-sectional area in a direction substantially perpendicular to the direction in which the granular detergent passes, the narrowest at the detergent inlet, and gradually expanding toward the lower part of the mixing chamber. Reverse taper pillar Wherein the cavity of is formed.

In the mixing chamber for the powder detergent automatic supply device of the present invention, in order to prevent the powder detergent from accumulating on the inner peripheral surface of the mixing chamber, the mixing chamber upper portion is substantially perpendicular to the direction in which the powder detergent passes. A cross-sectional area in the direction is the narrowest at the detergent inlet, and a reverse-tapered columnar cavity is formed that gradually expands toward the lower part of the mixing chamber.
If it does in this way, since the granular detergent thrown in from the detergent inlet is hard to contact the inner peripheral surface of the upper part of a mixing chamber, sticking of granular detergent is hard to generate | occur | produce. Furthermore, even if the granular detergent soared in the mixing chamber comes into contact with the inner peripheral surface of the upper portion of the mixing chamber, the inner peripheral surface of the upper portion of the mixing chamber is inclined so as to face downward in the vertical direction. It easily peels off from the inner peripheral surface of the upper part of the mixing chamber due to vibration during operation.
Furthermore, since there is no movable part for scraping off the granular detergent accumulated like the automatic supply apparatus described in Patent Document 1, it is possible to reduce the burden of maintenance and inspection work.

In the mixing chamber for the granular detergent automatic supply device of the present invention, the outer dimension of the upper portion of the mixing chamber in the direction perpendicular to the direction in which the granular detergent passes is constant, and the wall thickness constituting the upper portion of the mixing chamber is successively changed. It is desirable that
If the outer dimension of the upper part of the mixing chamber is constant, it is possible to avoid interference with surrounding parts while maintaining good fit between the parts constituting the powder detergent detergent automatic supply device such as a hopper and the lower part of the mixing chamber. . Furthermore, it becomes easy to replace an existing automatic powder detergent supply device.

In the mixing chamber for a powder detergent automatic supply device of the present invention, it is desirable that the upper portion of the mixing chamber is made of resin.
If the upper part of the mixing chamber is made of resin, the granular detergent is less likely to adhere to the inner peripheral surface of the upper part of the mixing chamber, and poor supply of the granular detergent is unlikely to occur.

In the mixing chamber for an automatic powder detergent supply device of the present invention, the upper portion of the mixing chamber is preferably made of a fluororesin.
When the upper part of the mixing chamber is made of a fluororesin, the granular detergent is less likely to adhere to the inner peripheral surface of the upper part of the mixing chamber, and poor supply of the granular detergent is less likely to occur.

In the mixing chamber for an automatic powder detergent supply device of the present invention, the upper portion of the mixing chamber is preferably composed of a tetrafluoroethylene-perfluoroalkoxyethylene copolymer.
When the upper part of the mixing chamber is made of a tetrafluoroethylene-perfluoroalkoxyethylene copolymer (hereinafter also referred to as PFA), the granular detergent is particularly difficult to adhere to the inner peripheral surface of the upper part of the mixing chamber. Defects in detergent supply are particularly unlikely to occur.

In the mixing chamber for a powder detergent automatic supply device of the present invention, the taper shape of the cavity is preferably a linear taper, and the taper angle is preferably −6 ° to −1 °.
When the taper angle of the cavity is within the above range, the size of the detergent supply port can be sufficiently secured while maintaining the effect that the granular detergent is difficult to adhere to the upper part of the mixing chamber.

The powder detergent automatic supply device of the present invention is provided with the mixing chamber for the powder detergent automatic supply device of the present invention.
Since the powder detergent automatic supply device of the present invention is equipped with the mixing chamber for the powder detergent automatic supply device of the present invention, it is difficult for the powder detergent to deposit on the inner peripheral surface of the mixture chamber, and the supply of the powder detergent is poor. Hard to happen.

FIG. 1 is a longitudinal sectional view schematically showing an example of a mixing chamber for a powder detergent automatic supply device of the present invention. Fig.2 (a) is a perspective view which shows typically an example of the mixing chamber upper part which comprises the mixing chamber for the granular detergent automatic supply apparatus of this invention, FIG.2 (b) is in FIG.2 (a). FIG. 2C is a cross-sectional view taken along the line AA, and FIG. 2C is a cross-sectional view taken along the line BB in FIG. Fig.3 (a) is a perspective view which shows typically another example of the mixing chamber upper part which comprises the mixing chamber for the granular detergent automatic supply apparatus of this invention, FIG.3 (b) is FIG.3 (a). It is a CC sectional view taken on the line in FIG. FIG. 4 is a longitudinal sectional view schematically showing an example of the automatic powder detergent supply device of the present invention. 5 is a photograph of the inner peripheral surface of the upper part of the mixing chamber after the test of Example 1. FIG. 6 is a photograph of the inner peripheral surface of the upper part of the mixing chamber after the test of Comparative Example 1. FIG.

Hereinafter, although the mixing chamber for the granular detergent automatic supply apparatus of the present invention will be described with reference to specific embodiments, the present invention is not limited to these embodiments.

The mixing chamber for the granular detergent automatic supply device according to the present invention includes a hopper for storing the granular detergent, a detergent supply section that is provided under the hopper, to which the granular detergent is sent from the hopper, and the detergent supply section. A mixing chamber for mixing a supplied granular detergent and water to form a detergent aqueous solution or a mixture of the granular detergent and water. The mixing chamber includes a mixing chamber upper portion having a detergent inlet into which the granular detergent is charged from the detergent supply unit, and a mixing chamber for mixing the granular detergent charged into the mixing chamber with water. In the upper part of the mixing chamber, the cross-sectional area in a direction substantially perpendicular to the direction in which the granular detergent passes is the narrowest at the detergent charging port, and is the reverse that gradually spreads toward the lower part of the mixing chamber. Tapered columnar cavity Made is characterized in that is.

In the mixing chamber for the powder detergent automatic supply device of the present invention, in order to prevent the powder detergent from accumulating on the inner peripheral surface of the mixing chamber, the mixing chamber upper portion is substantially perpendicular to the direction in which the powder detergent passes. A cross-sectional area in the direction is the narrowest at the detergent inlet, and a reverse-tapered columnar cavity is formed that gradually expands toward the lower part of the mixing chamber.
When the shape of the cavity is a reverse tapered columnar shape, the granular detergent put in from the detergent inlet is difficult to come into contact with the inner peripheral surface of the upper part of the mixing chamber. Furthermore, even if the granular detergent soared in the mixing chamber comes into contact with the inner periphery of the upper part of the mixing chamber, the inner peripheral surface of the upper part of the mixing chamber is inclined so as to face downward in the vertical direction. It easily peels off from the inner peripheral surface of the upper part of the mixing chamber due to vibration at the time.
Furthermore, unlike the automatic supply device described in Patent Document 1, it does not have a movable part, so the burden of maintenance and inspection work can be reduced.

The mixing chamber (hereinafter also simply referred to as a mixing chamber) for an automatic powder detergent supply device of the present invention of the present invention will be described with reference to FIG.
FIG. 1 is a longitudinal sectional view schematically showing an example of a mixing chamber for a powder detergent automatic supply device of the present invention.
As shown in FIG. 1, the mixing chamber 100 for an automatic powder detergent supply device is composed of an upper mixing chamber 40 and a lower mixing chamber 50. Near the upper end of the mixing chamber lower part 50, a nozzle 51 for injecting tap water into the mixing chamber lower part 50 is provided along the tangential direction of the cylindrical surface in the mixing chamber lower part 50. Thereby, the tap water injected from the nozzle 51 can form a vortex in the mixing chamber lower part 50.
The structure of the mixing chamber for the powder detergent automatic supply device including the nozzle 51 will be described in detail in the description of the powder detergent automatic supply device of the present invention.

Then, the mixing chamber upper part which comprises the mixing chamber for the granular detergent automatic supply apparatus of this invention is demonstrated using Fig.2 (a)-FIG.2 (c).
Fig.2 (a) is a perspective view which shows typically an example of the mixing chamber upper part which comprises the mixing chamber for the granular detergent automatic supply apparatus of this invention, FIG.2 (b) is in FIG.2 (a). FIG. 2C is a cross-sectional view taken along line AA, FIG. 2C is a cross-sectional view taken along line BB in FIG. 2A, and in FIG. 2A, the lines AA and BB are orthogonal to each other. ing.
As shown in FIGS. 2A, 2 </ b> B, and 2 </ b> C, the mixing chamber upper portion 40 has a cavity 41. One end of the cavity 41 is a detergent inlet 41 a, and the other end is a connection part 41 b connected to the lower part 50 of the mixing chamber. Further, the cross-sectional area of the cavity 41 in the direction substantially perpendicular to the direction in which the granular detergent passes (the direction indicated by the arrow a in FIGS. 2B and 2C) is the narrowest at the detergent inlet 41a, and the mixing is performed. It spreads sequentially toward the lower part 50 of the room. That is, the shape of the cavity 41 is a reverse tapered column shape.

The taper angle of the cavity is a cross section when the upper part of the mixing chamber is divided into four equal sections of 90 ° along the direction in which the granular detergent passes (the direction in which the inner peripheral surface and the granular detergent pass in two cross sections orthogonal to each other) It can be determined by the angle between
For example, the taper angle of the cavity 41 in the upper part 40 of the mixing chamber shown in FIG. 2A is the sum of the angles formed by the inner peripheral surface when cut along the line AA and the direction in which the granular detergent passes [FIG. The angle formed between θ ₁ + θ ₂ ] shown in (b) and the inner peripheral surface when cut along the BB line orthogonal to the AA line and the direction in which the granular detergent passes [FIG. 2 (c) the average value of θ _{3 +} θ _4] shown in, those with a minus sign to the average value becomes the taper angle of the cavity 41. At this time, the cut surface is selected so that the average value is maximized (the absolute value of the taper angle is maximized).

As shown in FIG. 2 (b) and FIG. 2 (c), the outer dimension of the mixing chamber upper part 40 in the direction perpendicular to the direction in which the granular detergent passes (direction indicated by the arrow a) is constant, and the mixing chamber upper part The wall thickness which comprises 40 is changing sequentially. If the outer dimension of the upper part of the mixing chamber 40 is constant, avoid interference with surrounding parts while maintaining good fit between the parts constituting the powder detergent detergent automatic supply device such as a hopper and the lower part 50 of the mixing chamber. Can do. Furthermore, it becomes easy to replace the existing powdered detergent automatic supply device (hereinafter also simply referred to as an automatic supply device).

In FIG. 2B, θ ₁ and θ ₂ are the same, but they may be different. If θ ₁ and θ ₂ are different, the position of the center of gravity in the sectional shape of the cavity 41 in the detergent inlet 41a and the position of the center of gravity in the sectional shape of the cavity 41 in the connecting portion 41b pass through the granular detergent. It does not match along the direction and is eccentric.
In FIGS. 2B and 2C, θ ₁ and θ ₃ are the same, but they may be different. The same applies to θ ₁ and θ ₄ , θ ₂ and θ ₃ , θ ₂ and θ _4, and θ ₃ and θ ₄ .

When the shape of the cavity 41 is an inverted tapered columnar shape, the granular detergent introduced from the detergent introduction port 41a is unlikely to come into contact with the inner peripheral surface of the upper part 40 of the mixing chamber. Further, even when the granular detergent soared in the mixing chamber comes into contact with the inner peripheral surface of the upper mixing chamber 40, the inner peripheral surface of the upper mixing chamber 40 is inclined so as to face downward in the vertical direction. It easily peels off from the inner peripheral surface of the mixing chamber upper part 40 due to vibrations during operation of the apparatus.

Since the granular detergent is difficult to adhere to the upper part of the mixing chamber constituting the mixing chamber for the automatic powder detergent supply apparatus of the present invention, it is not necessary to separately provide a movable part such as a scraping member. Therefore, it is possible to reduce the risk of failure and the like.

Although the material which comprises the mixing chamber upper part is not specifically limited, It is preferable that it is resin.
Examples of the resin include thermoplastic resins such as fluororesin and acrylic resin, and thermosetting resins such as phenol resin and epoxy resin, among which fluororesin is more preferable.
Examples of the fluororesin include tetrafluoroethylene-perfluoroalkoxyethylene copolymer (PFA), polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and polyvinyl fluoride (PVF). Then, PFA is particularly preferable.
When PFA is used as a material constituting the upper part of the mixing chamber, the granular detergent is particularly difficult to adhere to the inner peripheral surface of the mixing chamber.
Even if the material constituting the upper part of the mixing chamber is other than the resin, the resin layer may be formed on the surface by a method such as coating. In this case, it is preferable that the entire inner peripheral surface of the upper part of the mixing chamber is covered with a resin layer.

The shape of the cavity formed in the upper part of the mixing chamber is not particularly limited as long as it is a reverse tapered column shape, and may be a polygonal column, a cylinder, or an elliptical column. The type of taper may be a linear taper or a curved taper. The curve taper may be an exponential taper or a taper that cannot be expressed by a specific function.
The taper angle in the case of a linear taper is preferably −6 ° to −1 °.

Even if the shape of the cavity is not a linear taper, in the two cross-sectional views of the upper part of the mixing chamber obtained in accordance with the method for obtaining the taper angle at the time of the linear taper, the inner peripheral surface at the detergent inlet and the inner periphery at the connecting portion The average value of the sum of the two angles obtained by the angle formed by the straight line connecting the surfaces and the direction in which the granular detergent passes is preferably −6 ° to −1 °.

The cross-sectional shape of the cavity formed in the upper part of the mixing chamber in the direction perpendicular to the direction in which the granular detergent passes is not particularly limited, and may be circular or polygonal, but the corners of the polygon Since a granular detergent is easy to deposit on a part, it is preferable that it is circular.
In addition, the position of the center of gravity in the cross-sectional shape of the cavity at the detergent inlet and the position of the center of gravity in the cross-sectional shape of the cavity in the portion connected to the lower part of the mixing chamber coincide with each other along the direction in which the granular detergent passes. It does not have to match.

The surface roughness Ra of the inner peripheral surface in the upper part of the mixing chamber is not particularly limited, but is preferably 0.2 μm or less.
When the surface roughness Ra of the inner peripheral surface in the upper part of the mixing chamber is 0.2 μm or less, the granular detergent is hardly deposited on the inner peripheral surface.

The upper part of the mixing chamber constituting the mixing chamber for the powder detergent automatic supply device of the present invention may be provided with a member (also referred to as a connection guide) that assists in combination with other parts.
Another example of the present invention will be described with reference to FIGS. 3 (a) and 3 (b).
Fig.3 (a) is a perspective view which shows typically another example of the mixing chamber upper part which comprises the mixing chamber for the granular detergent automatic supply apparatus of this invention, FIG.3 (b) is FIG.3 (a). It is a CC sectional view taken on the line in FIG.
As shown in FIG. 3A, the mixing chamber upper part 140 includes a cavity 141. One end of the cavity 141 is a detergent inlet 141a, and the other end is a connecting portion 141b connected to the lower part of the mixing chamber. Furthermore, the mixing chamber upper part 140 has a connection guide 142 for assisting the connection with the lower part of the mixing chamber, and a connection guide 143 for assisting the connection on the detergent inlet 141a side. The connection guide 142 is a quadrangular prism-shaped protrusion having a hollow extending below the connection portion 141b. By providing another connection guide corresponding to the hollow shape in the lower portion of the mixing chamber, the connection guide 142 is mixed with the upper portion of the mixing chamber. Positioning and connection with the lower part of the room becomes easy. The connection guide 143 is a cylindrical protrusion provided in the upper part of the detergent inlet 141a and having a diameter larger than that of the detergent inlet 141a, and a correspondingly shaped protrusion or recess is provided in the powder detergent automatic supply device. This facilitates positioning when the upper part of the mixing chamber is connected to the automatic powder detergent supply device.
Further, as shown in FIG. 3B, the cross-sectional area of the cavity 141 in the direction substantially perpendicular to the direction in which the granular detergent passes (the direction indicated by the arrow a in FIG. 3B) is the detergent inlet 141a. It is the narrowest and spreads gradually toward the bottom of the mixing chamber. That is, the shape of the cavity 141 is a reverse tapered column shape.
Also, as shown in FIGS. 3A and 3B, a part of the side surface of the cylinder is cut into a part of the outer peripheral surface of the mixing chamber upper part 140 (for example, the detergent inlet 141a side of the connection guide 142). A location (connection guide 144, a region indicated by shading in FIG. 3A) may be provided.
By providing a part where the side of the cylinder is cut off at the top of the cylindrical mixing chamber, the connection direction when connecting the upper mixing chamber to the powder detergent automatic supply device can be easily understood and positioned. Since it is easy to assemble and assemble, it functions as a connection aid.

Each component (including the upper part of the mixing chamber and the lower part of the mixing chamber) constituting the mixing chamber for the powder detergent automatic supply device according to the present invention is a mechanism for connecting or fixing to other parts constituting the powder detergent automatic supply device. May be provided.
The mechanism is not particularly limited, and examples thereof include a fitting portion and a screwing portion, and a method of screwing through a screw hole may be employed.

The powder detergent automatic supply device of the present invention is provided with the mixing chamber for the powder detergent automatic supply device of the present invention.
Since the powder detergent automatic supply device of the present invention is equipped with the mixing chamber for the powder detergent automatic supply device of the present invention, it is difficult for the powder detergent to deposit on the inner peripheral surface of the mixture chamber, and the supply of the powder detergent is poor. Hard to happen.

With reference to FIG. 4, an automatic powder detergent supply device of the present invention will be described.
FIG. 4 is a longitudinal sectional view schematically showing an example of the automatic powder detergent supply device of the present invention.
The powder detergent automatic supply device 1 includes a hopper 2 that stores the powder detergent, and a detergent supply unit 3 to which the powder detergent is sent from the hopper 2.
In addition, there is further provided a mixing chamber 100 for a powder detergent automatic supply device that mixes the powder detergent supplied from the detergent supply unit 3 with water to create a mixture of the detergent aqueous solution or the powder detergent and water. Yes.
A detergent aqueous solution or a mixture of detergent and water is supplied from the mixing chamber 100 for the powder detergent automatic supply device to the outside of the powder detergent automatic supply device, typically a washing tank of an automatic dishwasher.

The detergent supply unit 3 is formed in a circular dish shape with a bottom lid, and is fixed so as to close the opening 13 of the hopper 2. This fixing is performed by fixing to the partition plate 11 from the lower part of the casing 10 of the granular detergent automatic supply apparatus 1.
The detergent supply unit 3 is provided with a blade gear 31 in which the granular detergent sent from the hopper 2 is filled between the tooth gaps.

The mixing chamber 100 for an automatic powder detergent supply device includes a mixing chamber upper portion 40 and a mixing chamber lower portion 50. The upper part 40 of the mixing chamber has a reverse tapered columnar cavity 41 having a detergent inlet 41 a to which detergent is supplied from the detergent supply unit 3 and a connecting part 41 b connected to the lower part 50 of the mixing chamber.
In the mixing chamber lower part 50, the granular detergent put into the mixing chamber upper part 40 is mixed with water. The mixing chamber lower part 50 is formed in a cylindrical shape whose diameter is larger than that of the mixing chamber upper part 40, the lower end part converges in a funnel shape, and the detergent supply port 101 is formed at the converged lowermost end part. A detergent supply port 101 at the lower end of the mixing chamber 100 for an automatic powder detergent supply device is fixed to the bottom lid 10a of the casing 10 and protrudes from the bottom lid 10a.
Near the upper end of the mixing chamber lower part 50, a nozzle 51 for injecting tap water into the mixing chamber lower part 50 is provided along the tangential direction of the cylindrical surface in the mixing chamber lower part 50. Thereby, the tap water injected from the nozzle 51 can form a vortex in the mixing chamber lower part 50. The tap water is supplied from the nozzle 51 by controlling the opening and closing of the water supply valve 52 by a control circuit (not shown).
The detergent supply port 101 is connected to the hose 5 and led to the outside of the automatic powder detergent supply device, for example, the washing tub A of the automatic dishwasher.

Hereinafter, another embodiment that is desirably included in the automatic powder detergent supply device of the present invention will be described with reference to FIG. 4 again.
The shape of the hopper 2 is substantially square-shaped at the top, and an opening 13 continuous with the detergent supply unit 3 is formed at the center of the bottom. The granular detergent stored in the hopper 2 is sent to the detergent supply unit 3 through the opening 13.
Further, a stirring blade 20 having a stirring blade 21 is provided at the center of the bottom of the hopper 2.
The stirring blade 20 can rotate around the center of the bottom of the hopper 2, and the stirring blade 21 rotates in conjunction with the rotation of the stirring blade 20. The stirring blade 21 may be a rod-like or plate-like one that simply stirs the granular detergent in the hopper 2, and stirs the granular detergent in the hopper 2 by forming an upward or downward flow. The propeller wing made as described above may be used.
The number of stirring blades of the stirring blade is not particularly limited, and may be one or more.

It is desirable that the periphery of the bottom of the hopper 2 that is outside the opening 13 on the bottom surface of the hopper 2 is an inclined surface 14 that is inclined downward toward the opening 13.
The inclination angle of the inclined surface 14 is desirably 3 to 40 ° with respect to a horizontal plane that is a surface perpendicular to the direction in which gravity acts. FIG. 4 shows an inclined surface having an inclination angle of about 5 ° (an angle indicated by θ ₅ in FIG. 4).
Since the periphery of the bottom of the hopper is an inclined surface, the granular detergent can fall toward the opening. Further, when the inclination angle is 40 ° or less, waste of the internal volume of the hopper can be reduced.
Since the mixing chamber 100 for the powder detergent automatic supply device is the mixing chamber for the powder detergent automatic supply device of the present invention, the powder detergent is difficult to deposit on the inner peripheral surface of the mixing chamber, and the supply of the powder detergent is poor. Hard to happen.

The blade gear 31 is formed so that the tooth root diameter is smaller than the opening diameter of the opening 13 of the hopper 2 and the tooth tip diameter is larger. Therefore, the granular detergent from the hopper 2 is sent to the detergent supply unit 3 through the gap between the tooth base of the blade gear 31 and the opening 13 of the hopper 2.

As shown in FIG. 4, the blade gear 31 is connected to and driven by a drive shaft 33 introduced from the lower end of the detergent supply unit 3, and the drive shaft 33 is a gear having a reduction gear. It is connected to a drive motor 35 via a box 34. By driving the drive motor 35, the vane gear 31 is rotatable forward and backward.

A pedestal 36 is provided above the blade gear 31, and the stirring blade 20 is fixed to the upper surface of the pedestal 36.
The stirring blade 20 has an appropriate space above the blade gear 31 and can be rotated in synchronization with the rotation of the blade gear 31. The stirring blade 20 is directly connected to a drive mechanism such as a motor. It may be connected and rotate on its own.

The outer peripheral portion of the detergent supply unit 3 is formed with an opening 30 having a hole provided below a portion corresponding to a central angle of about 90 degrees. An apparatus mixing chamber 100 is disposed. When the granular detergent filled between the teeth of the blade gear 31 reaches the opening 30 by the rotation of the blade gear 31, the granular detergent is supplied to the mixing chamber 100.

Examples for more specifically explaining the present invention are shown below, but the present invention is not limited to these examples.

(Automatic feeder 1)
The automatic powder supply apparatus having the shape shown in FIG.
The cross-sectional shape of the cavity formed in the upper part of the mixing chamber was an inversely tapered column, the type of taper was a linear taper, and the taper angle was −5.35 °.
In addition, the cross-sectional shape of the cavity at the detergent inlet is a circle with a diameter of 62 mm, the cross-sectional shape of the cavity at the connection with the lower part of the mixing chamber is a circle with a diameter of 66 mm, and the center of gravity of these two circles is the passage of the granular detergent Matched along the direction to.

(Automatic feeder 2)
An automatic supply device provided with a driven gear for scraping the granular detergent into the mixing chamber and a scraping member provided on the mixing chamber side of the driven gear at the upper portion of the detergent supply port of the automatic supply device 1. 2. The mounting position of the rod-shaped scraping member was adjusted so as to contact the inner peripheral surface of the mixing chamber. The shape of the cavity formed in the upper part of the mixing chamber was a columnar shape without a taper, and the diameter of the column was 66 mm.

Example 1
The automatic supply apparatus 1 was installed horizontally in a constant temperature and humidity chamber having a temperature of 35 ° C. and a humidity of 70%.
The operation of supplying 1.5 kg of granular detergent in 2 hours is one operation, the mixing chamber is disassembled after four operations, and the granular detergent adhering to the inner peripheral surface of the mixing chamber is visually observed, and the mixing chamber The granular detergent adhering to the inner peripheral surface was collected and weighed.

(Comparative Example 1)
The test was performed using the automatic feeder 2 under the same conditions as in Example 1.

(Evaluation)
FIG. 5 is a photograph of the inner peripheral surface of the upper part of the mixing chamber after the test of Example 1, and FIG. 6 is a photograph of the inner peripheral surface of the upper part of the mixing chamber after the test of Comparative Example 1.
As is clear from FIG. 5, in the automatic supply apparatus 1 of Example 1, the adhesion amount of the granular detergent was small. On the other hand, in the automatic supply apparatus 2 of the comparative example 1 shown in FIG. 6, the granular detergent adhered to the inner peripheral surface of the mixing chamber, and the amount of adhesion increased.
Moreover, when the weight of the granular detergent adhering to the inner peripheral surface of the mixing chamber was measured, it was 0.57 g in Example 1, and 13.28 g in Comparative Example 1, and the result of the automatic supply device in Example 1 Was confirmed to be good.

DESCRIPTION OF SYMBOLS 1 Powdery detergent automatic supply apparatus 2 Hopper 3 Detergent supply part 13 Opening 14 Inclined surface 20 Stirring blade 40,140 Mixing chamber upper part 41,141 Cavity 41a, 141a Detergent inlet 41b, 141b Connection part 50 Mixing chamber lower part 100 Powdered detergent Mixing chambers 142, 143, 144 for automatic feeders Connection guide

Claims (7)

A detergent prepared by mixing a hopper for storing a granular detergent, a detergent supply unit provided below the hopper, to which the granular detergent is sent from the hopper, and a granular detergent supplied from the detergent supply unit and water A mixing chamber for making a mixture of an aqueous solution or a granular detergent and water, and a mixing chamber for an automatic supplying apparatus for a granular detergent used in an automatic supplying apparatus for a granular detergent,
The mixing chamber comprises a mixing chamber upper portion having a detergent inlet into which granular detergent is charged from the detergent supply unit, and a mixing chamber lower portion for mixing the granular detergent charged into the mixing chamber upper portion with water,
In the upper part of the mixing chamber, there is a reverse tapered columnar cavity whose cross-sectional area in a direction substantially perpendicular to the direction in which the granular detergent passes is the narrowest at the detergent inlet, and gradually spreads toward the lower part of the mixing chamber. A mixing chamber for a powder detergent automatic supply device, wherein the mixing chamber is formed. The outer dimension of the upper part of the mixing chamber in the direction perpendicular to the direction in which the granular detergent passes is constant,
The mixing chamber for a granular detergent automatic supply device according to claim 1, wherein a wall thickness constituting the upper portion of the mixing chamber is sequentially changed. The upper part of the said mixing chamber is a mixing chamber for powdery detergent automatic supply apparatuses of Claim 1 or 2 comprised with resin. The said mixing chamber upper part is a mixing chamber for the granular detergent automatic supply apparatus in any one of Claims 1-3 comprised by the fluororesin. The mixing chamber upper part is a mixing chamber for a powder detergent automatic supply device according to any one of claims 1 to 4, wherein the upper portion of the mixing chamber is made of a tetrafluoroethylene-perfluoroalkoxyethylene copolymer. The mixing chamber for an automatic powder detergent supply device according to any one of claims 1 to 5, wherein the tapered shape of the cavity is a linear taper and the taper angle is -6 ° to -1 °. An automatic powder detergent supply device comprising the mixing chamber for the powder detergent automatic supply device according to any one of claims 1 to 6.

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