JP2008246072A - Automatic granular detergent supply device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic granular detergent supply device for stably supplying a granular detergent without being solidified by achieving a compact designing with a simple structure. <P>SOLUTION: The automatic granular detergent supply device 1 is provided with a hopper 2 for storing the granular detergent, a detergent supply part 3 for supplying the granular detergent from the hopper 2 and a mixing chamber 4 in which the granular detergent supplied from the detergent supply part 3 is mixed with water to produce a detergent solution and supplies the detergent solution or the mixture of the detergent and water into a washing tub A from the mixing chamber 4. The detergent supply part 3 is provided with an impeller 31 for feeding the detergent on the bottom of the hopper 2 while a driven gear 32 freely rotating being meshed with the impeller 31 is built at the upper part of the mixing chamber 4. The granular detergent filling between gear grooves of the impeller 31 by own dead weight from the hopper 2 is supplied to the mixing chamber 4 from the detergent supply part 3 with the rotation of the impeller 31 while being raked out with the driven gear 32 in the mixing chamber 4. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an apparatus for automatically supplying a granular detergent to a washing tank of a washing apparatus such as an automatic dishwashing apparatus.

  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.

  A first conventional example of this automatic supply device for granular detergent is a cartridge container containing powdered detergent as disclosed in Patent Document 1, and a granular or solidified detergent in the container is sprayed with water. This is an automatic detergent supply device that consists of a water jet nozzle that is applied or melted at a point.

The second conventional example is such that a detergent supply adjusting unit for a horizontal detergent screw is provided at the lower part of a reservoir (also referred to as a hopper) for containing the granular detergent as disclosed in Patent Document 2. is there. In this apparatus, the granular detergent is supplied into the mixer by rotation of the screw from the reservoir into the mixer provided at the lower part thereof, and the supplied granular detergent is supplied to the aqueous solution or detergent by the water flow along the inner wall surface of the mixer. And a mixture of detergent and water, and this detergent aqueous solution or a mixture of detergent and water is supplied to the washing tank of the washing apparatus.
Japanese National Patent Publication No. 9-504098 JP 2002-320584 A

  However, in the first conventional apparatus, when the spray water collides with the granular or solidified detergent in the cartridge container, a part of the spray water penetrates deep into the granular detergent remaining in the cartridge container. Resulting in. The amount of penetration increases as the number of sprays increases, and some components of the granular detergent in the cartridge container decompose when wet with water, or the solidification becomes more difficult to dissolve and the detergent The concentration (detergent supply amount) cannot be kept constant, resulting in inconveniences such as inconvenience in cleaning or a reduction in cleaning power.

  In the second conventional apparatus, since the granular detergent in the reservoir is supplied into the mixer by a screw, the supply amount can be made constant, but the avalanche phenomenon is prevented by the horizontal screw, the supply amount In order to stabilize the screw, a certain screw length is required, a long shape is required in the lateral direction, and the lateral width of the apparatus is large. In other words, since it was configured to supply the granular detergent between the screws after having sufficiently spread the granular detergent around the screw using a long screw, the width of the entire device is increased by installing a long screw. There was an inconvenience. In addition, when the granular detergent absorbs moisture and hardens, the load torque applied to the screw increases, and rotation may be hindered or locked.

  Furthermore, since the shape of the reservoir (hopper) is horizontally long in this screw-type supply device, the downward flow of the granular detergent in the reservoir due to natural gravity is not uniform, and a forced vibration device such as a vibrator Was required separately.

  In the mixer of the granular detergent and tap water (which may be hot water supply) of this apparatus, there is a concern that when the granular detergent adheres to the inner wall of the mixer, it sticks to the inner wall and accumulates. If the granular detergent accumulates on the inner wall, mixing with water may be hindered or the outflow of the detergent solution may be clogged.

  This screw-type feeder is vulnerable to the phenomenon of large chunks being bitten. Therefore, it is conceivable to reverse the screw to release the bite. However, when the screw is reversely rotated, the granular detergent flows backward, so that the reverse rotation cannot be performed.

  Further, the screw is difficult to be injection-molded, and mass production is difficult, so that the cost is increased.

  The present invention has been made in view of the actual situation, and can be designed compactly with a simple configuration, and can automatically supply the granular detergent without solidifying the granular detergent. The object is to provide a device.

  An automatic powder detergent supply device of the present invention for solving the above problems includes a hopper for storing a certain amount of powder detergent, a detergent supply unit for supplying a predetermined amount of powder detergent from the hopper, and the detergent supply. A mixing chamber in which the granular detergent supplied from the unit is mixed with water to form a detergent aqueous solution or a mixture of the detergent and water, and the detergent aqueous solution or the mixture of the detergent and water is put into the washing tank from the mixing chamber. An impeller for feeding detergent is provided at the bottom of the hopper, and a driven gear that meshes with the impeller and rotates freely is provided at the top of the mixing chamber. Is formed so as to form a tapered tooth gap that expands from a tooth root tooth gap to a tooth tip tooth groove, and an inclined surface that slopes from the tooth root side to the tooth tip side in the vicinity of the tooth gap. Formed, less tooth space Also, one part is notched to the tooth base to form a bowl-shaped notch, and the driven gear matches the pitch of the impeller, but forms sufficient play between the teeth of the impeller. The powdered detergent, which is formed into rod-shaped teeth that chew, and is filled between the teeth of the impeller by its own weight from the hopper, is supplied from the detergent supply unit to the mixing chamber by the rotation of the impeller. In this mixing chamber, it is scraped with a driven gear.

  In addition, an automatic powder detergent supply device of the present invention for solving the above problems includes a hopper that stores a certain amount of a granular detergent, a detergent supply unit that supplies a predetermined amount of the granular detergent from the hopper, and this A mixing chamber for mixing a granular detergent supplied from a detergent supply unit with water to form a detergent aqueous solution or a mixture of the detergent and water, and a washing tank for the detergent aqueous solution or the mixture of the detergent and water from the mixing chamber In the detergent supply section, an impeller for feeding detergent is provided at the bottom of the hopper, and a driven gear that meshes with the impeller and rotates freely is provided at the top of the mixing chamber. The impeller is formed so as to form a tapered tooth gap that expands from the tooth gap of the tooth root to the tooth gap of the tooth tip, and the driven gear matches the pitch of the impeller, but the tooth of the impeller Create enough play between the grooves The powdered detergent that forms rod-shaped teeth to be chewed and is filled between the tooth spaces of the impeller by its own weight from the hopper is supplied from the detergent supply section to the mixing chamber by the rotation of the impeller. It is made to scrape with a driven gear in a mixing chamber, and the number of teeth of an impeller and the number of teeth of a driven gear differ.

  Furthermore, an automatic powder detergent supply device according to the present invention for solving the above-described problems includes a hopper that stores a certain amount of the granular detergent, a detergent supply unit that supplies a predetermined amount of the granular detergent from the hopper, and this A mixing chamber for mixing a granular detergent supplied from a detergent supply unit with water to form a detergent aqueous solution or a mixture of the detergent and water, and a washing tank for the detergent aqueous solution or the mixture of the detergent and water from the mixing chamber In the detergent supply section, an impeller for feeding detergent is provided at the bottom of the hopper, and a driven gear that meshes with the impeller and rotates freely is provided at the top of the mixing chamber. The impeller is formed so as to form a tapered tooth gap that expands from the tooth gap of the tooth root to the tooth gap of the tooth tip, and the driven gear matches the pitch of the impeller, but the tooth of the impeller Enough play between the grooves A granular detergent that forms rod-shaped teeth that bite and is filled between the teeth of the impeller by its own weight from the hopper is supplied from the detergent supply unit to the mixing chamber by the rotation of the impeller, The mixing chamber is scraped by a driven gear, and at least one tooth tip of the driven gear is provided with a scraping bar extending along the inner peripheral surface of the mixing chamber, and is provided from the bottom of the mixing chamber. A support rod is provided with a gap between the inner circumferential surface of the mixing chamber and the scraping rod rotates along the inner circumferential surface of the mixing chamber following the rotation of the driven gear. It is made to pass between the peripheral surface and the support rod.

  Furthermore, an automatic powder detergent supply device according to the present invention for solving the above-described problems includes a hopper that stores a certain amount of the granular detergent, a detergent supply unit that supplies a predetermined amount of the granular detergent from the hopper, and this A mixing chamber for mixing a granular detergent supplied from a detergent supply unit with water to form a detergent aqueous solution or a mixture of the detergent and water, and a washing tank for the detergent aqueous solution or the mixture of the detergent and water from the mixing chamber In the detergent supply section, an impeller for feeding detergent is provided at the bottom of the hopper, and a driven gear that meshes with the impeller and rotates freely is provided at the top of the mixing chamber. The impeller is formed so as to form a tapered tooth gap that expands from the tooth gap of the tooth root to the tooth gap of the tooth tip, and the driven gear matches the pitch of the impeller, but the tooth of the impeller Enough play between the grooves A granular detergent that forms rod-shaped teeth that bite and is filled between the teeth of the impeller by its own weight from the hopper is supplied from the detergent supply unit to the mixing chamber by the rotation of the impeller, The mixing chamber is scraped by a driven gear, and the mixing chamber has a lower diameter than the upper portion, and the nozzle of the tap water introduction portion sprayed to the lower portion is substantially tangential to the inner peripheral surface of the lower portion. A vortex of water is formed in the lower part, and a baffle plate is provided at the upper end of the lower part to prevent the vortex from rising upward.

  Furthermore, the powder detergent automatic supply device of the present invention for solving the above-described problems is the above-described powder detergent automatic supply device, wherein the impeller intermittently rotates forward and reverse by controlling the drive motor by the control circuit. It was made to repeat.

  Since the present invention is configured as described above, the following effects are exhibited. In the present invention, the granular detergent filled between the tooth spaces of the impeller by its own weight from the hopper is supplied from the detergent supply unit to the mixing chamber by the rotation of the impeller, and is driven by a driven gear meshing with the impeller in the mixing chamber. Can be scraped. Therefore, even if the granular detergent absorbs moisture and becomes a little hard, a predetermined amount of the granular detergent can be stably supplied. Further, since the hardened granular detergent is supplied while being crushed, it exerts remarkable effects such as an action of promoting water dissolution of the detergent. Moreover, since the gravity fall of the granular detergent from a hopper is only supplied adjusting with an impeller and a driven gear, it can be comprised easily.

  Further, the impeller is formed so as to form an inclined surface inclined from the tooth base side to the tooth tip side in the vicinity of the tooth gap, and to supply the granular detergent to the driven gear side using the inclined surface. As a result, the space between the back side of the impeller and the detergent supply section becomes large, but at least one portion of the tooth gap forms a bowl-shaped notch cut out to the tooth base. Prevents the granular detergent from solidifying between the back side and the detergent supply section, and even if it is solidified, it can be crushed and scraped, and stable supply of the granular detergent can be achieved. .

  Furthermore, since the number of teeth of the impeller and the number of teeth of the driven gear are different, the impeller and the driven gear are not always meshed at the same position, thereby preventing the powder detergent from being fixed between the gears. Therefore, a stable supply of granular detergent can be achieved.

  Further, the scraping bar rotates along the inner peripheral surface of the mixing chamber following the rotation of the driven gear, and passes between the inner peripheral surface and the support rod, so that the inner periphery of the mixing chamber It is possible to prevent the granular detergent from adhering to the surface and to stably supply the granular detergent.

  Further, the diameter of the lower part of the mixing chamber is larger than that of the upper part of the mixing chamber, and a vortex of water is formed in the lower part of the mixing chamber. Therefore, it is possible to prevent the granular detergent from being fixed due to the swirling water that has risen in the upper part of the mixing chamber, and to stably supply the granular detergent.

  Furthermore, by rotating the impeller intermittently repeating forward and reverse rotations by controlling the drive motor by the control circuit, wear of the impeller is averaged for both forward and reverse rotation. The durability of the impeller and the driven gear meshing with the impeller is improved about twice. In addition, since the forward rotation and the reverse rotation are alternately repeated, for example, even if the rotation is temporarily inhibited due to an overload, the overload state is released at the time of the reverse rotation, and a more stable operation is possible. It shows remarkable effects such as becoming.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a plan view showing a powder detergent automatic supply device 1 according to an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view thereof.

  1 and 2, a powder detergent automatic supply device 1 according to the present invention includes a hopper 2 that stores a certain amount of powder detergent and a detergent that supplies a predetermined amount of powder detergent from the hopper 2 into the washing tank A. A mixing chamber 4 for mixing the powder detergent supplied from the supply unit 3 and the detergent supply unit 3 with water to form a detergent solution is provided, and the detergent aqueous solution or the mixture of the detergent and water is washed from the mixing chamber 4 In the detergent supply unit 3, a petal-like impeller 31 for feeding detergent is provided at the bottom of the hopper 2, and a driven gear 32 that meshes with the impeller 31 and rotates freely. Is provided in the upper part of the mixing chamber 4.

  The shape of the hopper 2 is formed in a bottomed rectangular tube shape, is formed in a substantially square bowl shape with an upper opening, and an opening 20 is formed in the center of the lower end. This hopper 2 is fitted to the upper part of the casing 10 of the powder detergent automatic supply device 1 which is a square tube having a substantially square shape in plan view, and is fixed to the partition plate 11 in the casing 10. An opening 11a that matches the lower end opening 20 of the hopper 2 is perforated in the partition plate 11, and the hopper 2 is fixed to the partition plate 11 so as to match the opening 11a.

  The detergent supply unit 3 is formed in a bottom lid circular dish shape, and is fixed so as to close the lower end opening 20 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 petal-like impeller 31 for sending out the detergent.

  The impeller 31 has a petal-like tooth shape with a pointed tip portion that is close to substantially zero with respect to the tooth thickness of the tooth base that is sufficiently large. A tapered tooth groove that expands from the groove to the tooth groove of the tooth tip is formed. Each tooth is formed so as to form an inclined surface 31a inclined like a slide in which the vicinity of the tooth gap is inclined from the tooth base side to the tooth tip side, and the granular detergent from above is added to the tooth tip side. It is made to be easy to send out. Further, at least one portion of the tooth gap is notched to the tooth base to form a bowl-shaped notch 31b, and the granular detergent is solidified between the back side of the impeller 31 and the detergent supply part 3. It is made to be able to be crushed and scraped even if solidified. Therefore, stable supply of the granular detergent can be achieved without causing a reduction in the amount of the granular detergent due to solidification.

  Furthermore, the impeller 31 is formed so that the diameter of the tooth root is smaller than the opening diameter of the lower end opening 20 of the hopper 2 and the diameter of the tooth tip is larger. Accordingly, the granular detergent from the hopper 2 is supplied to the detergent supply unit 3 from the gap between the tooth base of the impeller 31 and the lower end opening 20 of the hopper 2. The impeller 31 is connected to and driven by a drive shaft 33 introduced from the lower end of the detergent supply unit 3. The drive shaft 33 is driven by a drive motor via a gear box 34 having a reduction gear. 35. By driving the drive motor 35, the impeller 31 can be rotated forward and backward.

  Further, a projection 36 is provided above the impeller 31 for facilitating removal of the impeller 31 by hand during maintenance. A stirring blade 37 having a base end in a cap shape so as to cover the protrusion 36 is fixed to the protrusion 36. The agitating blade 37 is spaced upward from the impeller 31 and agitates the granular detergent in the hopper 2 in synchronization with the rotation of the impeller 31 in the hopper 2. The stirring blade 37 may be a bar or plate that simply stirs the granular detergent in the hopper 2, and forms an upward or downward flow in the granular detergent in the hopper 2. Or a propeller blade adapted to be stirred.

  The outer peripheral portion of the detergent supply unit 3 is cut out at a portion corresponding to a central angle of about 90 degrees to form an opening 30. A driven gear 32 is provided at a position adjacent to the impeller 31 so as to mesh with the impeller 31 exposed through the opening 30.

  The driven gear 32 matches the pitch of the impeller 31 but has a number of teeth smaller than that of the impeller 31 and engages by forming sufficient play between the tooth grooves of the impeller 31. It is designed to form teeth. The driven gear 32 meshes with the impeller 31 so that the granular detergent clogged between the tooth grooves of the impeller 31 can be scraped out by the teeth of the driven gear 32. Moreover, since the number of teeth of the driven gear 32 is one less than the number of teeth of the impeller 31, it is possible to prevent the same teeth from meshing during meshing. Therefore, when the same teeth always mesh with each other, a habit is formed between the tooth spaces, and the granular detergent can be prevented from solidifying between the tooth spaces other than the meshing raceways. Therefore, stable supply of the granular detergent can be achieved without causing a reduction in the amount of the granular detergent due to consolidation.

  In this embodiment, the number of teeth of the impeller 31 is one less than the number of teeth of the driven gear 32, but the diameter of the impeller 31 is smaller than the diameter of the driven gear 32. The number of teeth of the driven gear 32 is one less than the number of teeth of the impeller 31. This relationship is determined by the diameters of the impeller 31 and the driven gear 32.

  In the present embodiment, the driven gear 32 is formed so as to match the pitch of the impeller 31, but the pitch of a part of the driven gear 32 is different within the range of play between the tooth spaces. It may be what you did. In this case, it becomes easy to scrape off the granular detergent solidified between the tooth gaps due to distortion when teeth having different pitches of the driven gear 32 mesh with the tooth grooves of the impeller 31.

  The mixing chamber 4 has a cylindrical upper portion 4a. The lower part 4b of the mixing chamber 4 has a cylindrical shape whose diameter is larger than that of the upper part 4a. The lower end part of the mixing chamber 4 converges in a funnel shape, and a detergent supply port 40 is formed at the converged lowermost part. In the mixing chamber 4, the center of the lower part 4b is eccentric with respect to the center of the upper part 4a. The mixing chamber 4 is fixed to the partition plate 11 from the lower part of the casing 10 so that the upper part 4a is located immediately below the driven gear 32. The detergent supply port 40 at the lower end of the mixing chamber 4 is fixed to the bottom lid 10a of the casing 10 and protrudes from the bottom lid 10a. The detergent supply port 40 is connected to the hose 5 and led to the cleaning tank A. As shown in FIG. 3, in the vicinity of the upper end portion of the lower portion 4 b of the mixing chamber 4, a nozzle 41 for injecting tap water into the lower portion 4 b of the mixing chamber 4 extends along the tangential direction of the cylindrical surface in the mixing chamber 4. Is provided. As a result, the tap water sprayed from the nozzle 41 can form a vortex in the lower part 4 b in the mixing chamber 4. The supply of tap water from the nozzle 41 is performed by controlling the opening and closing of the water supply valve 42 by a control circuit (not shown). A baffle plate 43 is provided at a position near the upper end of the lower portion 4 b of the mixing chamber 4 where the water from the nozzle 41 substantially goes around the lower portion 4 b of the mixing chamber 4. The baffle plate 43 is configured so that the vortex of water formed in the mixing chamber 4 by the flow of water from the nozzle 41 does not rise to the upper portion 4 a of the mixing chamber 4. In addition to the baffle plate 43 being provided in the mixing chamber 4, the vortex of the water formed in the lower portion 4 b is also caused by the fact that the lower portion 4 b is eccentric in a cylindrical shape whose diameter is larger than that of the upper portion 4 a. It is made not to rise. Therefore, it is possible to prevent the granular detergent from being fixed due to the swirl of the water rising to the upper portion 4a of the mixing chamber 4 and to stably supply the granular detergent.

  The baffle plate 43 is formed with a gap 43 a so as to cover the water level sensor S on the downstream side of the vortex formed by the tap water from the nozzle 41. Thus, the water level sensor S is protected by the baffle plate 43 and the water level can be measured steadily without the powdery detergent supplied from above being attached for some reason and malfunctioning. When the vortex formed by the tap water from the nozzle 41 has risen to the position of the water level sensor S, it is determined that the water level has risen too much and the supply of tap water from the nozzle 41 is stopped.

  From the driven gear 32 provided immediately above the mixing chamber 4, a scraping bar 44 is provided along the inner peripheral surface of the upper portion 4 a of the mixing chamber 4. A support rod 45 is provided from the bottom of the lower portion 4 b of the mixing chamber 4 so as to leave a gap with the inner peripheral surface of the upper portion 4 a of the mixing chamber 4. The scraping bar 44 follows the rotation of the driven gear 32 and rotates along the inner peripheral surface of the upper portion 4a of the mixing chamber 4 without interfering with the inner peripheral surface. The inner peripheral surface of the upper portion 4a and the support rod 45 to pass through. Therefore, even if the granular detergent is solidified on the inner peripheral surface of the upper portion 4 a of the mixing chamber 4, it can be scraped off by the scraping bar 44. Further, even when the granular detergent is solidified on the scraping bar 44 itself, the scraping bar 44 passes between the inner peripheral surface of the upper portion 4a of the mixing chamber 4 and the support bar 45. At this time, it is scraped off by the support rod 45. Thereby, it can prevent that a granular detergent solidifies to the upper part 4a of the mixing chamber 4, and can aim at the stable supply of a granular detergent. In particular, when hot water is supplied from the nozzle 41, the granular detergent itself is easily dissolved, but steam rises in the mixing chamber 4, so that the granular detergent is in the upper part 4 a of the mixing chamber 4. It becomes easy to consolidate. Even in such a case, the granular detergent solidified by the scraping bar 44 and the support bar 45 can be scraped off as described above, so that the stable supply of the granular detergent is maintained and the hot water supply is performed. Is also possible.

  According to the powder detergent automatic supply device 1 configured as described above, the impeller 31 is provided at the bottom of the hopper 2, and a predetermined amount of the powder detergent is supplied to the water and the mixing chamber 4 by the rotation of the impeller 31. At the same time, by providing the driven gear 32 that meshes with the impeller 31 and freely rotates, it acts to scrape out the granular detergent between the blades of the impeller 31, so even if the granular detergent absorbs moisture and becomes slightly hardened A predetermined amount of granular detergent can be stably supplied. Further, since the hardened granular detergent is supplied while being crushed, it exerts remarkable effects such as an action of promoting water dissolution of the detergent.

  Since the impeller 31 has a control circuit that repeats forward rotation and reverse rotation intermittently, the wear of the impeller 31 is averaged for both forward rotation and reverse rotation, and therefore the impeller 31 and the driven gear meshing with the impeller 31. The durability of 32 is improved about twice. Furthermore, since forward rotation and reverse rotation are alternately repeated, even if there is a lump of granular detergent, biting can be prevented. For example, even if overload is temporarily inhibited and rotation is temporarily inhibited, overload during reverse rotation There is an action of releasing the state, and more stable operation is possible. Further, the impeller 31 may be used only in the forward rotation or the reverse rotation, and may be used in the reverse rotation or the forward rotation opposite to the previous one only when an overload is detected. In the screw type, reverse rotation is not possible (since the detergent flows backward).

  In addition, as an example of the usage state of the granular detergent automatic supply device 1 configured as described above, the impeller 31 is continuously rotated 90 degrees in 5 seconds, and about 50 g of granular detergent is continuously obtained in one minute. About 2 liters of tap water can be supplied from the nozzle 41 per minute. However, this use state is an example, and the capability is changed in the scale of the granular detergent automatic supply device 1, the rotational speed of the impeller 31 and the driven gear 32, the amount of tap water supplied from the nozzle 41, and the like. By doing so, it can be adjusted appropriately.

  The present invention can be applied to an automatic supply device that supplies a granular detergent to a cleaning tank of a cleaning device such as an automatic dishwashing device.

It is a top view of the granular detergent automatic supply device of the present invention. It is a longitudinal cross-sectional view of the granular detergent automatic supply apparatus of this invention. It is the II sectional view taken on the line of FIG.

Explanation of symbols

2 Hopper 3 Detergent supply section 31 Impeller 31a Inclined surface 31b Notch 32 Driven gear 34 Gear box 35 Drive motor 37 Stirring blade 4 Mixing chamber 4a Upper 4b Lower 41 Nozzle 42 Water supply valve 43 Baffle plate 44 Scraping bar 45 Support bar

Claims (6)

A hopper for storing a certain amount of granular detergent, a detergent supply section for supplying a predetermined amount of granular detergent from this hopper, and mixing the granular detergent supplied from this detergent supply section with water to produce a detergent aqueous solution or detergent A device for supplying a detergent aqueous solution or a mixture of detergent and water from the mixing chamber into a washing tank,
The detergent supply section is provided with an impeller for sending the detergent at the bottom of the hopper, and a driven gear that meshes with the impeller and freely rotates is provided at the top of the mixing chamber.
The impeller is formed so as to form a tapered tooth gap that expands from the tooth gap of the tooth root to the tooth gap of the tooth tip, and is inclined near the tooth gap from the tooth root side to the tooth tip side. A surface is formed, and at least one part of the tooth gap is notched to the tooth base to form a bowl-shaped notch,
The driven gear matches the pitch of the impeller, but forms a rod-like tooth that forms a sufficient play between the tooth grooves of the impeller and engages,
The granular detergent filled between the gear teeth of the impeller by its own weight from the hopper is supplied from the detergent supply unit to the mixing chamber by the rotation of the impeller, and is scraped by the driven gear in this mixing chamber. An automatic powder detergent supply device characterized by being made. A hopper for storing a certain amount of granular detergent, a detergent supply section for supplying a predetermined amount of granular detergent from this hopper, and mixing the granular detergent supplied from this detergent supply section with water to produce a detergent aqueous solution or detergent A device for supplying a detergent aqueous solution or a mixture of detergent and water from the mixing chamber into a washing tank,
The detergent supply section is provided with an impeller for sending the detergent at the bottom of the hopper, and a driven gear that meshes with the impeller and freely rotates is provided at the top of the mixing chamber.
The impeller is configured to form a tapered tooth gap that expands from the tooth root tooth gap to the tooth tip tooth gap,
The driven gear matches the pitch of the impeller, but forms a rod-like tooth that forms a sufficient play between the tooth grooves of the impeller and engages,
The granular detergent filled between the gear teeth of the impeller by its own weight from the hopper is supplied from the detergent supply unit to the mixing chamber by the rotation of the impeller, and is scraped by the driven gear in this mixing chamber. Made,
An automatic powder detergent supply device, wherein the number of teeth of the impeller and the number of teeth of the driven gear are different. A hopper for storing a certain amount of granular detergent, a detergent supply section for supplying a predetermined amount of granular detergent from this hopper, and mixing the granular detergent supplied from this detergent supply section with water to produce a detergent aqueous solution or detergent A device for supplying a detergent aqueous solution or a mixture of detergent and water from the mixing chamber into a washing tank,
The detergent supply section is provided with an impeller for sending the detergent at the bottom of the hopper, and a driven gear that meshes with the impeller and freely rotates is provided at the top of the mixing chamber.
The impeller is configured to form a tapered tooth gap that expands from the tooth root tooth gap to the tooth tip tooth gap,
The driven gear matches the pitch of the impeller, but forms a rod-like tooth that forms a sufficient play between the tooth grooves of the impeller and engages,
The granular detergent filled between the gear teeth of the impeller by its own weight from the hopper is supplied from the detergent supply unit to the mixing chamber by the rotation of the impeller, and is scraped by the driven gear in this mixing chamber. Made,
At least one tooth tip of the driven gear is provided with a scraping bar extending along the inner peripheral surface of the mixing chamber, and a gap is formed between the bottom of the mixing chamber and the inner peripheral surface of the mixing chamber. A support rod is provided to follow the rotation of the driven gear, and the scraping rod rotates along the inner peripheral surface of the mixing chamber and passes between the inner peripheral surface and the support rod. An automatic powder detergent supply device. A hopper for storing a certain amount of granular detergent, a detergent supply section for supplying a predetermined amount of granular detergent from this hopper, and mixing the granular detergent supplied from this detergent supply section with water to produce a detergent aqueous solution or detergent A device for supplying a detergent aqueous solution or a mixture of detergent and water from the mixing chamber into a washing tank,
The detergent supply section is provided with an impeller for sending the detergent at the bottom of the hopper, and a driven gear that meshes with the impeller and freely rotates is provided at the top of the mixing chamber.
The impeller is configured to form a tapered tooth gap that expands from the tooth root tooth gap to the tooth tip tooth gap,
The driven gear matches the pitch of the impeller, but forms a rod-like tooth that forms a sufficient play between the tooth grooves of the impeller and engages,
The granular detergent filled between the gear teeth of the impeller by its own weight from the hopper is supplied from the detergent supply unit to the mixing chamber by the rotation of the impeller, and is scraped by the driven gear in this mixing chamber. Made,
The lower part of the mixing chamber has a larger diameter than the upper part, and the nozzle of the tap water introduction part sprayed to the lower part is provided in a substantially tangential direction of the inner peripheral surface of the lower part so as to form a swirl of water in the lower part. An automatic powder detergent supply device characterized in that a baffle plate is provided at the upper end of the lower portion to prevent the vortex from rising upward.   5. The automatic powder detergent supply device according to claim 1, wherein the impeller repeats forward rotation and reverse rotation intermittently by control of a drive motor by a control circuit.   6. An automatic powder detergent supply device according to claim 5, wherein when an overload is detected, the impeller rotates in the direction opposite to the rotation direction at that time.

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