CA2204784A1 - A method and an arrangement for dispensing a particulate detergent - Google Patents
A method and an arrangement for dispensing a particulate detergentInfo
- Publication number
- CA2204784A1 CA2204784A1 CA002204784A CA2204784A CA2204784A1 CA 2204784 A1 CA2204784 A1 CA 2204784A1 CA 002204784 A CA002204784 A CA 002204784A CA 2204784 A CA2204784 A CA 2204784A CA 2204784 A1 CA2204784 A1 CA 2204784A1
- Authority
- CA
- Canada
- Prior art keywords
- detergent
- mixing vessel
- water
- balance
- dishwashing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00
- D06F39/02—Devices for adding soap or other washing agents
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/44—Devices for adding cleaning agents; Devices for dispensing cleaning agents, rinsing aids or deodorants
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Washing And Drying Of Tableware (AREA)
- Detergent Compositions (AREA)
Abstract
According to the invention, the detergent or cleaner is mixed with water and this mixture is fed into a trade washing machine or dish washer. Thus, the detergent or cleaner is loaded continuously or in portions onto a weighing scale and from there supplied to a mixing vessel once a predetermined weight has been reached. At the same time water is allowed to flow into the mixing vessel, where a ratio of at most 5 kg per minute detergent or cleaner to 8 l water per minute is maintained. With this costeffective metering process, detergent or cleaner can be metered precisely in the standard amounts for commercial laundering or washing operations and fed in without any problem.
Description
~ , CA 02204784 1997-0~-07 A Method and an Arrangement for Dispensing a Particulate Detergent This invention relates to a method for the automatic quantity-controlled dispensing of a particulate detergent from a storage container into an institutional washing or dishwashing machine, the detergent being mixed with water and the resulting lllixlule being introduced into the washing or dishwashing machine.
S Methods of this type are preferably applied in institutional dishwashing or washing processes. The laundry or dishwashing detergent - also referred to hereinafter as the "product" - is permanently held in a sufficient quantity in astorage container and is automatically added to the fresh water or to the circulating water as and when required. To this end, dispensers and dispensing methods have been developed for introducing powder-form detergent under control into the particular machine, for example into the dispensing compartment of an institutional dishwashing machine. One such dispensing method is known from DE 37 21 381 Al. In this case, a predetermined volume is introduced into the dispensing col"pal l",ent of the powder dispenser and is flushed with water into the washing or dishwashing machine which is generally located beneath the dispenser. This volumetric dispensing process ple~upposes that the products used always have thesame appart;"l density. In addition, the angle of repose of the product is included in this volumetric dispensing method. Unfortunately, variations in flow behaviorand in the particle size distribution lead to different angles of repose and hence to inaccurate dispensing. Although the inaccuracies in dispensing are acceptable inpractice, there is a need for more accurate dispensing to optimize detergent consumption.
Automatic dispensers for gravimetric precision filling systems are also known. In their case, the product drops from a dispensing chute into a dispensing container with a pneumatic closure flap. The dispensing container so to speak forms the balance pan of a precision weigh feeder. When the required weight is reached, the closure flap opens and the product drops into a portion container.
This process is unsuitable for dispensing laundry or dishwashing detergents.
If the quantities normally used in institutional washing or dishwashing processes, for example 500 g, are flushed from the portion container with water, the product CA 02204784 1997-0~-07 becomes lumpy and cannot be transported into the machine by standard pumps or through standard pipes. In addition, the product tends to cake in the dispensingchannel which makes it initially difficult and ultimately impossible to dispensefurther quantities of detergent.
Accordingly, the problem addressed by the present invention was to provide an inexpensive dispensing method of the type mentioned at the beginning by whichdetergent could readily be dispensed with precision in the quantities normally used for institutional washing or dishwashing processes.
According to the invention, the solution to this problem is characterized in that the laundry or dishwashing detergent is delivered continuously or in portions to a balance pan of a balance and, when the required weight determined in advance is reached, the detergent is transferred from the balance pan to a mixing vessel, water is allowed to flow into the mixing vessel at the same time and a ratio of at most 5 kg of detergent introduced per minute to 8 litres of water per minute is m~int~ined. It is particularly important that the detergent is introduced into the mixing vessel at the same time as the water and that the ratio of detergent to water mentioned above is m~int~ined. Accordingly, the quantity of product to be dispensed is not suddenly combined with water all at once, but only gradually. In this way, the product is inexpensively dispensed into the machine in exact quantities by weight without any flushing difficulties or caking occurring. This dispensingof exact quantities by weight enables d~lelgell~ consumption to be monitored andoptimi7f~1 In one advantageous embodiment of the invention, the detergent-to-water ratio can be adapted to the particular product. Thus, if products produced by spray drying are to be dispensed, only at most 2.2 kg per minute should be introduced into the mixing vessel for a water inflow rate of 8 liters per minute. In the case of products with an apparent density of more than 600 g/l, so-called heavy powders, this limit is higher, i.e. at 5 kg of product per minute, again based on a water inflow rate of 8 liters per minute.
To enable the product-to-water ratio to be readily established, the detergent is delivered to the mixing vessel positioned beneath the balance pan through an outlet in the balance pan provided with a controllable closure and the outlet is CA 02204784 1997-0~-07 .
opened partly or completely according to the required detergent discharge rate. The outlet may be formed, for example, by a flap or slide.
If the d~lergelll drops through several openings in the storage container onto a balance pan positioned underneath, it is of advantage for the balance pan to assume the form of a funnel with an opening at its lowest point. The adjustable closure can then be arranged over this opening.
Particularly effective mixing of the detergent with the inflowing water in the mixing vessel and correspondingly problem-free dispensing of the product into the particular machine is achieved if the water is allowed to flow tangentially into the mixing vessel. The product and the water are mixed thoroughly with one another without any need for an additional aid, for example a stirrer.
The detergent storage containers for institutional washing or dishwashing machines generally hold relatively large quantities of product, for example 60 kg.
The container in which the product is sold, for example a 250 kg sack, is often positioned above the storage container of the dispenser and fills it with product as and when required. Because it contains hygroscopic components, the product stored for a prolonged period in the storage container and in the sack tends to cake and to form lumps. The agglomerates can be troublesome both during the transfer of the product from the storage container to the balance pan and during its gradual delivery according to the invention into the mixing vessel at the same time as the water. This particular problem can be solved by allowing the detergent to trickle through openings in the bottom of the storage container onto the balance pan positioned underneath, a stirrer turning immediately above said openings. The openings in the storage container are advantageously of at most such a size that the lumps and agglomerates typically occurring are unable to pass through the openings. The stirrer turning above the openings breaks up the agglomerates so that only fine particles trickle onto the balance pan.
In another embodiment of the invention, the product undergoes preliminary volumetric dispensing. To this end, the detergent drops through the openings - in the form of dispensing holes - onto a collecting pan positioned underneath from which the portions thus formed are pushed over the edge of the collecting pan and allowed to trickle onto the balance pan. Product trickles through each dispensing CA 02204784 1997-0~-07 ~ . .
hole until a frustoconical unit with the corresponding angle of repose comes up against the edge of the dispensing hole. More powder is only able to flow downwards through the hole after portioned quantities of product already presenthave been pushed aside. This volumetric dispensing process is described in detail in DE 37 21 381 Al.
The method according to the invention can be carried out in different ways.
In a first variant, the entire quantity by weight of detergent required for a wash cycle or dishwashing step is dispensed in a single step into the mixing vessel and from there into the washing or dishwashing machine. This is basic dispensing in the context of the invention.
According to the invention, the detergent can also be dispensed as required and, at the same time, the quantity by weight dispensed can be monitored. To this end, a fraction of the quantity by weight of detergent required for a wash cycle or dishwashing step is introduced into the mixing vessel and from there into the washing or dishwashing m~hine, the conductivity of the liquor is measured in themachine and the process is repeated until the measured conductivity has reached a set value. In this variant, therefore, the individual portions are not weighed to determine the total amount of product required, but instead to measure consumption. The quantity by weight dispensed can be indicated, stored or printed out at the end of a working day. The particular demand for product and any malfunctions in the washing or dishwashing process can easily be identified. In the practical application of this variant, for example, 10 g of product are added inpulses, the pulses are counted and the addition of these portions is stopped when the conductivity measured in the particular machine has reached its set value.
The soil to be removed binds part of the laundry or dishwashing d~lelg~
If there are relatively large amounts of soil to be removed, the set conductivity value is only reached after a relatively large amount of product has been dispensed.
In this variant of the process according to the invention, therefore, the detergent can be dispensed as required and the quantity by weight of consumed product can be monitored at the same time.
The present invention relates not only to a dispensing method, but also to a dispensing arrangement for carrying out this method comprising a storage . CA 02204784 1997-0~-07 container and a mixing vessel connected to a water pipe. With this dispensing arrangement, the problem addressed by the invention, as stated above, is solved by a balance pan of a balance positioned above the mixing vessel and by a controllable closure for an outlet opening in the balance pan which is designed to open partly S or completely.
The closure is preferably a flap or slide.
If there are several openings in the storage container through which the detergent drops onto the balance pan positioned underneath, the balance pan is advantageously in the form of a funnel with an opening at its lowest point.
Particularly effective mixing and flushing in of the product are achieved by a tangential direction of flow of the water pipe into the mixing vessel.
Lumps and agglomerates formed by prolonged storage of the product in the storage container and the supply sack do not present any problems in another advantageous embodiment of the arrangement according to the invention, in which a stirrer is provided immediately above the outlet openings in the bottom of thestorage container.
One example of embodiment of the invention is described in detail in the following with reference to the accol.lpallying drawings, wherein:
Figure 1 schematically illustrates an arrangement suitable for carrying out the method according to the invention.
Figure 2 is a plan view of a plate with dispensing holes and a stirrer arranged in the lower part of the storage container of the arrangement shown in Fig. 1.
Figure 3 is a plan view of a collecting pan with a stripping mechanism positioned beneath the plate shown in Fig. 2.
In the illustrated embodiment, a detergent is to be dispensed into one or more washing machines of an institutional laundry. The detergent is introduced from its supply container, a 250 kg sack, into a storage container 1 with a holding capacity of 60 kg. A volumetric dispenser to be described in more detail hereinafter is provided in the lower part of the storage container. In the interests of clarity, Fig. 1 shows only one stirrer 3 which is driven by a motor 2 and which breaks up the agglomerates caked together under the effect of moisture. With each . CA 02204784 1997-0~-07 .
volumetric dispensing step, around 30 cm3 of detergent drops down through openings 4 in the bottom of the storage container 1 onto a funnel-shaped balancepan 5 connected to an electronic balance 6.
The particulate detergent trickles into the neck of the funnel which is surrounded by a flap 7. When the set weight is reached, the flap 7 opens and thedetergent drops into the mixing vessel 8. In the illustrated embodiment, the detergent is one produced by spray drying. The flap 7, of which the closure mech~ni~m is controlled by an electronic unit 9, only opens far enough to allow 2.0 kg of detergent per minute to trickle into the mixing vessel. At the same time, 8 litres of water per minute are delivered tangentially into the mixing vessel through a pipe 10.
A bypass leads upwards from the pump 12 into the mixing vessel 8. A
small part of the water/product mixture in the mixing vessel 8 is pumped back into the mixing vessel through the bypass 11 so that an adequate volume of liquid is present at the inlet end of the pump 12 in all operational states. This ensures that the pump 12 does not deliver any air.
During or after t~rmin~tion of the transfer of product from the balance pan 5 to the mixing vessel, the water/product mixture is delivered by a pump 12 to one or more institutional washing machines.
Figure 2 is a plan view of a plate 13 with three dispensing holes 14 arranged in the lower part of the storage container 1. During the dispensing process, four arms 15 of a stirrer 16 rotate and break up moisture-agglomerated detergent into small easy-to-dispense particles.
The particulate detergent drops through the dispensing holes 14 onto the collecting pan 17 shown in Fig. 3. The frustoconical product portions 18 formed are pushed by rotating strippers 19 over the edge 20 of the opening 4 so that they trickle onto the balance pan 5.
In the illustrated embodiment, the dispensing holes are 18 mm in diameter and the distance between the collecting pan 17 and the plate 13 is 10 mm. Other dimensions are also possible, depending on the required volume of the portions 18 to be dispensed; the product-dependent angle of repose may also be taken into consideration.
. - CA 02204784 1997-05-07 List of Reference Numerals Storage container 2 Motor 3 Stirrer 4 Openings 5 Balance pan 6 Balance 7 Flap 8 Mixing vessel 9 Electronic unit (control) 10 Pipe 1 1 Bypass 12 Pump 1 3 Plate 14 Dispensing hole 15 Stirrer arm 1 6 Stirrer 17 Collecting pan 18 Portion to be dispensed 1 9 Stripper 20 Edge
S Methods of this type are preferably applied in institutional dishwashing or washing processes. The laundry or dishwashing detergent - also referred to hereinafter as the "product" - is permanently held in a sufficient quantity in astorage container and is automatically added to the fresh water or to the circulating water as and when required. To this end, dispensers and dispensing methods have been developed for introducing powder-form detergent under control into the particular machine, for example into the dispensing compartment of an institutional dishwashing machine. One such dispensing method is known from DE 37 21 381 Al. In this case, a predetermined volume is introduced into the dispensing col"pal l",ent of the powder dispenser and is flushed with water into the washing or dishwashing machine which is generally located beneath the dispenser. This volumetric dispensing process ple~upposes that the products used always have thesame appart;"l density. In addition, the angle of repose of the product is included in this volumetric dispensing method. Unfortunately, variations in flow behaviorand in the particle size distribution lead to different angles of repose and hence to inaccurate dispensing. Although the inaccuracies in dispensing are acceptable inpractice, there is a need for more accurate dispensing to optimize detergent consumption.
Automatic dispensers for gravimetric precision filling systems are also known. In their case, the product drops from a dispensing chute into a dispensing container with a pneumatic closure flap. The dispensing container so to speak forms the balance pan of a precision weigh feeder. When the required weight is reached, the closure flap opens and the product drops into a portion container.
This process is unsuitable for dispensing laundry or dishwashing detergents.
If the quantities normally used in institutional washing or dishwashing processes, for example 500 g, are flushed from the portion container with water, the product CA 02204784 1997-0~-07 becomes lumpy and cannot be transported into the machine by standard pumps or through standard pipes. In addition, the product tends to cake in the dispensingchannel which makes it initially difficult and ultimately impossible to dispensefurther quantities of detergent.
Accordingly, the problem addressed by the present invention was to provide an inexpensive dispensing method of the type mentioned at the beginning by whichdetergent could readily be dispensed with precision in the quantities normally used for institutional washing or dishwashing processes.
According to the invention, the solution to this problem is characterized in that the laundry or dishwashing detergent is delivered continuously or in portions to a balance pan of a balance and, when the required weight determined in advance is reached, the detergent is transferred from the balance pan to a mixing vessel, water is allowed to flow into the mixing vessel at the same time and a ratio of at most 5 kg of detergent introduced per minute to 8 litres of water per minute is m~int~ined. It is particularly important that the detergent is introduced into the mixing vessel at the same time as the water and that the ratio of detergent to water mentioned above is m~int~ined. Accordingly, the quantity of product to be dispensed is not suddenly combined with water all at once, but only gradually. In this way, the product is inexpensively dispensed into the machine in exact quantities by weight without any flushing difficulties or caking occurring. This dispensingof exact quantities by weight enables d~lelgell~ consumption to be monitored andoptimi7f~1 In one advantageous embodiment of the invention, the detergent-to-water ratio can be adapted to the particular product. Thus, if products produced by spray drying are to be dispensed, only at most 2.2 kg per minute should be introduced into the mixing vessel for a water inflow rate of 8 liters per minute. In the case of products with an apparent density of more than 600 g/l, so-called heavy powders, this limit is higher, i.e. at 5 kg of product per minute, again based on a water inflow rate of 8 liters per minute.
To enable the product-to-water ratio to be readily established, the detergent is delivered to the mixing vessel positioned beneath the balance pan through an outlet in the balance pan provided with a controllable closure and the outlet is CA 02204784 1997-0~-07 .
opened partly or completely according to the required detergent discharge rate. The outlet may be formed, for example, by a flap or slide.
If the d~lergelll drops through several openings in the storage container onto a balance pan positioned underneath, it is of advantage for the balance pan to assume the form of a funnel with an opening at its lowest point. The adjustable closure can then be arranged over this opening.
Particularly effective mixing of the detergent with the inflowing water in the mixing vessel and correspondingly problem-free dispensing of the product into the particular machine is achieved if the water is allowed to flow tangentially into the mixing vessel. The product and the water are mixed thoroughly with one another without any need for an additional aid, for example a stirrer.
The detergent storage containers for institutional washing or dishwashing machines generally hold relatively large quantities of product, for example 60 kg.
The container in which the product is sold, for example a 250 kg sack, is often positioned above the storage container of the dispenser and fills it with product as and when required. Because it contains hygroscopic components, the product stored for a prolonged period in the storage container and in the sack tends to cake and to form lumps. The agglomerates can be troublesome both during the transfer of the product from the storage container to the balance pan and during its gradual delivery according to the invention into the mixing vessel at the same time as the water. This particular problem can be solved by allowing the detergent to trickle through openings in the bottom of the storage container onto the balance pan positioned underneath, a stirrer turning immediately above said openings. The openings in the storage container are advantageously of at most such a size that the lumps and agglomerates typically occurring are unable to pass through the openings. The stirrer turning above the openings breaks up the agglomerates so that only fine particles trickle onto the balance pan.
In another embodiment of the invention, the product undergoes preliminary volumetric dispensing. To this end, the detergent drops through the openings - in the form of dispensing holes - onto a collecting pan positioned underneath from which the portions thus formed are pushed over the edge of the collecting pan and allowed to trickle onto the balance pan. Product trickles through each dispensing CA 02204784 1997-0~-07 ~ . .
hole until a frustoconical unit with the corresponding angle of repose comes up against the edge of the dispensing hole. More powder is only able to flow downwards through the hole after portioned quantities of product already presenthave been pushed aside. This volumetric dispensing process is described in detail in DE 37 21 381 Al.
The method according to the invention can be carried out in different ways.
In a first variant, the entire quantity by weight of detergent required for a wash cycle or dishwashing step is dispensed in a single step into the mixing vessel and from there into the washing or dishwashing machine. This is basic dispensing in the context of the invention.
According to the invention, the detergent can also be dispensed as required and, at the same time, the quantity by weight dispensed can be monitored. To this end, a fraction of the quantity by weight of detergent required for a wash cycle or dishwashing step is introduced into the mixing vessel and from there into the washing or dishwashing m~hine, the conductivity of the liquor is measured in themachine and the process is repeated until the measured conductivity has reached a set value. In this variant, therefore, the individual portions are not weighed to determine the total amount of product required, but instead to measure consumption. The quantity by weight dispensed can be indicated, stored or printed out at the end of a working day. The particular demand for product and any malfunctions in the washing or dishwashing process can easily be identified. In the practical application of this variant, for example, 10 g of product are added inpulses, the pulses are counted and the addition of these portions is stopped when the conductivity measured in the particular machine has reached its set value.
The soil to be removed binds part of the laundry or dishwashing d~lelg~
If there are relatively large amounts of soil to be removed, the set conductivity value is only reached after a relatively large amount of product has been dispensed.
In this variant of the process according to the invention, therefore, the detergent can be dispensed as required and the quantity by weight of consumed product can be monitored at the same time.
The present invention relates not only to a dispensing method, but also to a dispensing arrangement for carrying out this method comprising a storage . CA 02204784 1997-0~-07 container and a mixing vessel connected to a water pipe. With this dispensing arrangement, the problem addressed by the invention, as stated above, is solved by a balance pan of a balance positioned above the mixing vessel and by a controllable closure for an outlet opening in the balance pan which is designed to open partly S or completely.
The closure is preferably a flap or slide.
If there are several openings in the storage container through which the detergent drops onto the balance pan positioned underneath, the balance pan is advantageously in the form of a funnel with an opening at its lowest point.
Particularly effective mixing and flushing in of the product are achieved by a tangential direction of flow of the water pipe into the mixing vessel.
Lumps and agglomerates formed by prolonged storage of the product in the storage container and the supply sack do not present any problems in another advantageous embodiment of the arrangement according to the invention, in which a stirrer is provided immediately above the outlet openings in the bottom of thestorage container.
One example of embodiment of the invention is described in detail in the following with reference to the accol.lpallying drawings, wherein:
Figure 1 schematically illustrates an arrangement suitable for carrying out the method according to the invention.
Figure 2 is a plan view of a plate with dispensing holes and a stirrer arranged in the lower part of the storage container of the arrangement shown in Fig. 1.
Figure 3 is a plan view of a collecting pan with a stripping mechanism positioned beneath the plate shown in Fig. 2.
In the illustrated embodiment, a detergent is to be dispensed into one or more washing machines of an institutional laundry. The detergent is introduced from its supply container, a 250 kg sack, into a storage container 1 with a holding capacity of 60 kg. A volumetric dispenser to be described in more detail hereinafter is provided in the lower part of the storage container. In the interests of clarity, Fig. 1 shows only one stirrer 3 which is driven by a motor 2 and which breaks up the agglomerates caked together under the effect of moisture. With each . CA 02204784 1997-0~-07 .
volumetric dispensing step, around 30 cm3 of detergent drops down through openings 4 in the bottom of the storage container 1 onto a funnel-shaped balancepan 5 connected to an electronic balance 6.
The particulate detergent trickles into the neck of the funnel which is surrounded by a flap 7. When the set weight is reached, the flap 7 opens and thedetergent drops into the mixing vessel 8. In the illustrated embodiment, the detergent is one produced by spray drying. The flap 7, of which the closure mech~ni~m is controlled by an electronic unit 9, only opens far enough to allow 2.0 kg of detergent per minute to trickle into the mixing vessel. At the same time, 8 litres of water per minute are delivered tangentially into the mixing vessel through a pipe 10.
A bypass leads upwards from the pump 12 into the mixing vessel 8. A
small part of the water/product mixture in the mixing vessel 8 is pumped back into the mixing vessel through the bypass 11 so that an adequate volume of liquid is present at the inlet end of the pump 12 in all operational states. This ensures that the pump 12 does not deliver any air.
During or after t~rmin~tion of the transfer of product from the balance pan 5 to the mixing vessel, the water/product mixture is delivered by a pump 12 to one or more institutional washing machines.
Figure 2 is a plan view of a plate 13 with three dispensing holes 14 arranged in the lower part of the storage container 1. During the dispensing process, four arms 15 of a stirrer 16 rotate and break up moisture-agglomerated detergent into small easy-to-dispense particles.
The particulate detergent drops through the dispensing holes 14 onto the collecting pan 17 shown in Fig. 3. The frustoconical product portions 18 formed are pushed by rotating strippers 19 over the edge 20 of the opening 4 so that they trickle onto the balance pan 5.
In the illustrated embodiment, the dispensing holes are 18 mm in diameter and the distance between the collecting pan 17 and the plate 13 is 10 mm. Other dimensions are also possible, depending on the required volume of the portions 18 to be dispensed; the product-dependent angle of repose may also be taken into consideration.
. - CA 02204784 1997-05-07 List of Reference Numerals Storage container 2 Motor 3 Stirrer 4 Openings 5 Balance pan 6 Balance 7 Flap 8 Mixing vessel 9 Electronic unit (control) 10 Pipe 1 1 Bypass 12 Pump 1 3 Plate 14 Dispensing hole 15 Stirrer arm 1 6 Stirrer 17 Collecting pan 18 Portion to be dispensed 1 9 Stripper 20 Edge
Claims
1. A method for the automatic quantity-controlled dispensing of a particulate detergent from a storage container into an institutional washing or dishwashing machine, the detergent being mixed with water and the resulting mixture being introduced into the washing or dishwashing machine, characterized in that the laundry or dishwashing detergent is delivered continuously or in portions to a balance pan of a balance and, when the required weight determined in advance is reached, the detergent is transferred from the balance pan to a mixing vessel, water is allowed to flow into the mixing vessel at the same time and a ratio of at most 5 kg of detergent introduced per minute to 8 litres of water per minute is maintained.
2. A method as claimed in claim 1 for dispensing a laundry or dishwashing detergent produced by spray drying, characterized in that at most 2.2 kg of the detergent per minute is introduced into the mixing vessel for a water inflow rate of 8 litres per minute.
3. A method as claimed in claim 1 or 2, characterized in that the detergent is delivered to the mixing vessel positioned beneath the balance pan through an outlet in the balance pan provided with a controllable closure and the outlet is openedpartly or completely according to the required detergent discharge rate.
4. A method as claimed in the preceding claim, characterized in that the closure is a flap or slide.
5. A method as claimed in any of the preceding claims, characterized in that the balance pan is in the form of a funnel with an opening at its lowest point.
6. A method as claimed in any of the preceding claims, characterized in that the water is allowed to flow tangentially into the mixing vessel.
7. A method as claimed in any of the preceding claims, characterized in that the detergent is allowed to trickle through openings in the bottom of the storage container onto the balance pan positioned underneath, a stirrer turning immediately above said openings.
8. A method as claimed in the preceding claims, characterized in that the detergent drops through the openings - in the form of dispensing holes - onto a collecting pan positioned underneath from which the portions thus formed are pushed over the edge of the collecting pan and allowed to trickle onto the balance pan.
9. A method as claimed in any of the preceding claims, characterized in that the entire quantity by weight of detergent required for a wash cycle or dishwashing step is dispensed in a single step into the mixing vessel and from there into the washing or dishwashing machine.
10. A method as claimed in any of claims 1 to 8, characterized in that a fraction of the quantity by weight of detergent required for a wash cycle or dishwashing step is introduced into the mixing vessel and from there into the washing or dishwashing machine, the conductivity of the liquor is measured in the machine and the process is repeated until the measured conductivity has reached a set value.11. An arrangement for carrying out the method claimed in any of the preceding claims comprising a storage container (1) and a mixing vessel (8) connected to awater pipe (10), characterized by a balance pan (5) of a balance (6) positioned above the mixing vessel (8) and by a controllable closure (7) for an outlet opening in the balance pan (5) which is designed to open partly or completely.
12. An arrangement as claimed in the preceding claim, characterized in that the closure is a flap (7) or a slide.
13. An arrangement as claimed in claim 11 or 12, characterized in that the balance pan (5) is in the form of a funnel with an opening at its lowest point.
14. An arrangement as claimed in any of claims 11 to 13, characterized by a tangential flow direction of the water pipe (10) into the mixing vessel (8).
15. An arrangement as claimed in any of claims 11 to 14, characterized by a stirrer (3) provided immediately above the outlet openings (4) in the bottom of the storage container (1).
2. A method as claimed in claim 1 for dispensing a laundry or dishwashing detergent produced by spray drying, characterized in that at most 2.2 kg of the detergent per minute is introduced into the mixing vessel for a water inflow rate of 8 litres per minute.
3. A method as claimed in claim 1 or 2, characterized in that the detergent is delivered to the mixing vessel positioned beneath the balance pan through an outlet in the balance pan provided with a controllable closure and the outlet is openedpartly or completely according to the required detergent discharge rate.
4. A method as claimed in the preceding claim, characterized in that the closure is a flap or slide.
5. A method as claimed in any of the preceding claims, characterized in that the balance pan is in the form of a funnel with an opening at its lowest point.
6. A method as claimed in any of the preceding claims, characterized in that the water is allowed to flow tangentially into the mixing vessel.
7. A method as claimed in any of the preceding claims, characterized in that the detergent is allowed to trickle through openings in the bottom of the storage container onto the balance pan positioned underneath, a stirrer turning immediately above said openings.
8. A method as claimed in the preceding claims, characterized in that the detergent drops through the openings - in the form of dispensing holes - onto a collecting pan positioned underneath from which the portions thus formed are pushed over the edge of the collecting pan and allowed to trickle onto the balance pan.
9. A method as claimed in any of the preceding claims, characterized in that the entire quantity by weight of detergent required for a wash cycle or dishwashing step is dispensed in a single step into the mixing vessel and from there into the washing or dishwashing machine.
10. A method as claimed in any of claims 1 to 8, characterized in that a fraction of the quantity by weight of detergent required for a wash cycle or dishwashing step is introduced into the mixing vessel and from there into the washing or dishwashing machine, the conductivity of the liquor is measured in the machine and the process is repeated until the measured conductivity has reached a set value.11. An arrangement for carrying out the method claimed in any of the preceding claims comprising a storage container (1) and a mixing vessel (8) connected to awater pipe (10), characterized by a balance pan (5) of a balance (6) positioned above the mixing vessel (8) and by a controllable closure (7) for an outlet opening in the balance pan (5) which is designed to open partly or completely.
12. An arrangement as claimed in the preceding claim, characterized in that the closure is a flap (7) or a slide.
13. An arrangement as claimed in claim 11 or 12, characterized in that the balance pan (5) is in the form of a funnel with an opening at its lowest point.
14. An arrangement as claimed in any of claims 11 to 13, characterized by a tangential flow direction of the water pipe (10) into the mixing vessel (8).
15. An arrangement as claimed in any of claims 11 to 14, characterized by a stirrer (3) provided immediately above the outlet openings (4) in the bottom of the storage container (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4439680A DE4439680C1 (en) | 1994-11-07 | 1994-11-07 | Process for dosing a particulate detergent or cleaning agent and device suitable therefor |
| DEP4439680.5 | 1994-11-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2204784A1 true CA2204784A1 (en) | 1996-05-17 |
Family
ID=6532651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002204784A Abandoned CA2204784A1 (en) | 1994-11-07 | 1995-10-30 | A method and an arrangement for dispensing a particulate detergent |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0790798B1 (en) |
| AT (1) | ATE184774T1 (en) |
| CA (1) | CA2204784A1 (en) |
| DE (2) | DE4439680C1 (en) |
| FI (1) | FI971933A0 (en) |
| WO (1) | WO1996014012A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8220293B2 (en) | 2007-10-08 | 2012-07-17 | Miele & Cie. Kg | Treating agent dispensing system for a washing machine, and washing machine |
| US8359888B2 (en) | 2007-10-08 | 2013-01-29 | Miele & Cie. Kg | Dispensing system for powdered treating agent for use in a washing machine, and washing machine |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19852205C2 (en) * | 1998-11-12 | 2001-10-18 | Matthias Gerhards | Detergent dispenser |
| DE29820266U1 (en) * | 1998-11-12 | 1999-07-15 | Gerhards, Matthias, 87527 Sonthofen | Automatic laundry detergent dispenser with water hardness level regulation and child lock |
| DE10331464A1 (en) * | 2003-05-21 | 2004-12-16 | Aweco Appliance Systems Gmbh & Co. Kg | Household appliance, e.g. a washing machine or dishwasher, has a pressure line for connecting a rinsing pump to the dosing unit so that any washing agent is completely rinsed out |
| DE10347766A1 (en) * | 2003-10-14 | 2005-06-09 | BSH Bosch und Siemens Hausgeräte GmbH | Household machine with a system for supplying detergent into the cleaning liquid |
| CN101649536A (en) * | 2008-08-14 | 2010-02-17 | 博西华电器（江苏）有限公司 | Rotary drum washing machine and method for controlling water inlet of same |
| EP2540902B1 (en) | 2011-06-30 | 2020-05-13 | Electrolux Home Products Corporation N.V. | Laundry washing machine |
| AT516795B1 (en) * | 2015-01-28 | 2019-08-15 | Knorr Bremse Gmbh | Rotary valve and sanding system for a rail vehicle with improved response and less pulsating material flow |
| TR201617595A1 (en) * | 2016-12-01 | 2018-06-21 | Arcelik As | A Dishwasher with Detergent Efficiency |
| CN112798764A (en) * | 2021-01-22 | 2021-05-14 | 宁波大禾仪器有限公司 | Automatic powder adding shrinkage testing equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2921911C2 (en) * | 1979-05-30 | 1985-07-25 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Control device for washing machines |
| US4444730A (en) * | 1982-06-07 | 1984-04-24 | Colgate-Palmolive Company | Detergent dispenser |
| JPS60192224A (en) * | 1984-03-13 | 1985-09-30 | Michio Oya | Weighing and discharging mechanism of detergent |
| DD232518A1 (en) * | 1984-12-06 | 1986-01-29 | Schwarzenberg Waschgeraete | DEVICE FOR THE ADDITION OF WASHING AND WASHING AIDS IN WASHING MACHINES |
| DE3721381A1 (en) * | 1987-06-29 | 1989-01-19 | Henkel Kgaa | POWDER DOSING DEVICE |
| DD262686A1 (en) * | 1987-07-30 | 1988-12-07 | Textima Veb K | METHOD AND DEVICE FOR DOSING POWDERED OR GRANULATE SOFT TEXTILE TOOLS |
-
1994
- 1994-11-07 DE DE4439680A patent/DE4439680C1/en not_active Expired - Fee Related
-
1995
- 1995-10-30 WO PCT/EP1995/004244 patent/WO1996014012A1/en active IP Right Grant
- 1995-10-30 DE DE59506912T patent/DE59506912D1/en not_active Expired - Lifetime
- 1995-10-30 AT AT95936567T patent/ATE184774T1/en not_active IP Right Cessation
- 1995-10-30 CA CA002204784A patent/CA2204784A1/en not_active Abandoned
- 1995-10-30 EP EP95936567A patent/EP0790798B1/en not_active Expired - Lifetime
-
1997
- 1997-05-06 FI FI971933A patent/FI971933A0/en not_active Application Discontinuation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8220293B2 (en) | 2007-10-08 | 2012-07-17 | Miele & Cie. Kg | Treating agent dispensing system for a washing machine, and washing machine |
| US8359888B2 (en) | 2007-10-08 | 2013-01-29 | Miele & Cie. Kg | Dispensing system for powdered treating agent for use in a washing machine, and washing machine |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0790798A1 (en) | 1997-08-27 |
| DE4439680C1 (en) | 1996-06-05 |
| WO1996014012A1 (en) | 1996-05-17 |
| EP0790798B1 (en) | 1999-09-22 |
| ATE184774T1 (en) | 1999-10-15 |
| DE59506912D1 (en) | 1999-10-28 |
| FI971933A (en) | 1997-05-06 |
| FI971933A0 (en) | 1997-05-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3822056A (en) | Method and means for adding small measured quantities of selected materials to a large capacity material-mixing plant | |
| US4998850A (en) | Gel dispensing apparatus and method | |
| CA2432871A1 (en) | Distributed control architecture and improved metering apparatus and methods for agricultural chemical dispensers | |
| US4836685A (en) | Process and an apparatus for mixing substances | |
| JP2653840B2 (en) | Powder dosing device | |
| US5167350A (en) | Detergent dispensing device | |
| CA2204784A1 (en) | A method and an arrangement for dispensing a particulate detergent | |
| US7240807B2 (en) | Method and apparatus for administering micro-ingredient feed additives to animal feed rations | |
| EP1793725B1 (en) | Solid detergent dispenser and use of such dispenser | |
| CN101362061A (en) | Process and device for processing granular material mixtures | |
| HU228880B1 (en) | Dual solid chemical feed system | |
| KR20100072233A (en) | Material delivery systems and methods | |
| US5100032A (en) | Reservoir for collecting dissolved solid detergent solution | |
| GB2127045A (en) | Automatic drum washing machine | |
| JP2002528254A (en) | Hydraulic control of detergent concentration in automatic commodity washing machines | |
| JP6655647B2 (en) | Pesticide supply machine | |
| GB2338658A (en) | Computer-controlled apparatus for the manufacture and distribution of slurry | |
| CN109996481A (en) | Dispensing apparatus and system | |
| JPS6323698A (en) | Apparatus for metering and distributing non-fluid chemical substance | |
| WO2020212868A1 (en) | Continuous dosing device for solid or liquid materials and relevant operating method | |
| CN108064530B (en) | Full-automatic fertilizer preparation system | |
| CN218530706U (en) | Automatic blending system for artificial leather slurry | |
| CN210699970U (en) | Sawdust weighing and glue mixing system | |
| CN108820327A (en) | A kind of mixing nut packing machine | |
| CN218339486U (en) | Batching fill convenient to use |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |