JPS6159126B2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a grinder for beans such as coffee beans,
This invention relates to a device that releases the powder particles of beans that have been crushed with a cutter.

Conventional grinding of this type of coffee beans is generally done by rotating a blade cutter installed in a grinding chamber to grind the coffee beans. The powder is sorted by a filter installed in the grinding chamber and discharged into the storage section by the wind generated by the fan, so that the roughness of the powder particles is approximately constant, and there is a risk that the aroma and taste may change due to heating etc. Grinding machines for coffee beans and other legumes have been developed that can process coffee beans and other beans quickly. In such a pulse crusher, there is a risk that the powder particles sent from the grinding chamber to the storage section may be discharged from the discharge opening of the storage section by the exhaust air, so an introduction opening is formed at the top of the storage section. death,
It is conceivable to provide a guide plate opposite to this introduction opening to guide the airflow that transports the powder particles to the lower part of the storage part, but such a structure Since powder particles accumulate at the bottom of the introduction opening, when the powder particles accumulate and reach the lower edge of the guide plate, a space is formed on the side opposite to the side where the introduction opening was formed, and the The volume cannot be used effectively, the flow of air is obstructed, and the suction efficiency of the fan is low.

The present invention was developed in view of the above-mentioned drawbacks, and a guide plate is formed in substantially the same direction as the introduction direction of the air flow that guides the powder particles to the storage section, so that the powder particles are accumulated from the side away from the introduction opening of the storage section. To provide a pulse pulverizer that can effectively utilize the volume of a storage part and feed powder into the storage part efficiently.

Next, the configuration of an embodiment of the present invention will be explained with reference to FIGS. 1 to 5.

A base 1 has an electric motor 2 built therein, and a drive shaft 3 of the electric motor 2 protrudes from the top surface of the base 1. A ventilation chamber 4 in which a protruding portion of the drive shaft 3 is located and a duct portion 5 communicating with the ventilation chamber 4 are formed on the upper surface of the base 1.

Further, a mounting part 9 for a storage case 8 forming a storage part 7 is integrally provided at the lower part of one side of the base 1.

An introduction opening 10 that communicates with the duct section 5 when the storage case 8 is placed on the mounting section 9 is formed in the upper part of one side of the storage case 8. A discharge opening 11 is formed in the surface. The discharge opening 11 is located at substantially the same position as or above the introduction opening 10, and a lid 12 is provided to open and close the upper opening of the storage case 8.

Further, on the inner surface of this lid body 12, there is a guide plate 13 that separates the introduction opening 10 and the discharge opening 11 from the introduction opening 10.
It is formed substantially parallel to the direction of air flow from the duct portion 5 communicating with the air flow. The guide plate 13 protrudes downward by approximately the same amount or more than the lower surface of the introduction opening 10.

Further, 14 is a fan, and a ventilation chamber 4 is attached to the drive shaft 3.
It is installed facing the

Next, 15 is a case body in which a crushing chamber 16 is formed, a base case member 17 and a crushing part case member 1.
8, and the base case member 17 and the crusher case member 18 are connected by a clamp (not shown).

The ventilation chamber 4 and the duct portion 5 are formed by the bottom opening surface of the base case member 17 placed on the top surface of the base 1 and the top surface of the base 1. They are connected to each other by screws (not shown). Further, a filter receiving portion 19 is formed in a step-like notch on the inner periphery of the upper surface opening in the base case member 17 .

Furthermore, the crushing chamber 16 of this crushing part case member 18
A lower opening edge of the base case member 17 is fitted into the filter receiving portion 19 of the base case member 17.

Further, the base case member 17 has a discharge opening 11.
A circulating flow duct portion 20 is formed which communicates with
is formed outside the crushing chamber 16 formed in the upper part of the crushing part case member 18. The upper end of this circulation passage 21 is communicated with the hopper chamber 23 through a circulation port 22 formed at the upper end side of the hopper chamber 23 formed above the grinding chamber 16 . The lower part of this hopper chamber 23 is the opening 2
4 communicates with the grinding chamber 16.

Next, reference numeral 25 denotes a filter, which is formed in the shape of a mesh mesh that allows powder particles of a predetermined particle size to pass through. The pulverizing unit case member 18
It is adapted to be clamped at the lower opening edge of the crushing chamber 16.

Reference numeral 26 denotes a blade cutter, which is formed with a blade section deviated by 180 degrees, and is detachably attached to the tip of the drive shaft 3 close to above the filter 25.

A plurality of blade pieces protrudes from the upper surface of the fan 14, and the fan 14 is disposed so as to face the lower end opening of the crushing chamber 16.
The duct portion 5 is located at a tangent to the rotational direction of 4.
is coming.

Reference numeral 27 designates a lid body that freely opens and closes the upper surface openings of the hopper chamber 23 and the circulation path 21 of the case body 15, and is molded from synthetic resin and is attached to the upper surface opening edge of the hopper chamber 23 of the crushing section case member 18. An annular edge to be fitted is formed, and is adapted to be removably connected with a clamp (not shown). A guide elongated hole 29 for guiding a regulating protrusion 28 protruding from the upper part of the crusher case member 18 is formed in the lid 27 concentrically with the lid 27 .

Further, an arc-shaped adjustment portion 30 is vertically integrally formed on the inner surface of the lid body 27 to face the recirculation port 22 and protrude integrally therewith, and the adjustment portion 30 is formed to be longer than the height of the recirculation port 22 .

Next, the operation of this embodiment will be explained.

When grinding beans, such as coffee beans, the coffee beans are put into the hopper chamber 23 of the case body 15, and when the electric motor 2 is driven with the top surface of the case body 15 closed with the lid body 27, the cutter 26 and the fan 14 are rotated. The rotation of the cutter 26 crushes the coffee beans supplied from the hopper chamber 23. At this time, the fan 14 is driven to pass through the crushing chamber 16 as shown in FIG.
It flows from the discharge opening 11 through the circulation duct section 20, the circulation path 21, the circulation port 22, and the hopper chamber 23 to the adjustment section 30, and flows from the lower opening of the hopper chamber 23 to the grinding chamber 16. An air flow is generated, and the coffee beans having a predetermined particle size or less that are crushed by the cutter 26 pass through the filter 25 located at the lower part of the cutter 26 due to this air flow and the centrifugal force of the cutter 26, and the coffee beans are crushed by the cutter 26. The beans in the hopper chamber 23 are discharged downward, and are smoothly supplied to the crushing chamber 16 by the air flow, sent from the crushing chamber 16 to the ventilation chamber 4, and sent through the duct section 5 to the storage section 7 of the storage case 8. It can be done. This air flow also cools the coffee beans or ground powder.

Note that the opening area of the circulation port 22 is adjusted by adjusting the opening area of the recirculation port 22 by rotating the lid body 27 with the engagement guide between the projection 28 and the elongated hole 29.
0 and when the airflow is throttled, the pressure in the reservoir 7 increases, the residence time of the powder flow in the grinding chamber 16 becomes longer, the degree of grinding increases, and when the circulation port 22 is opened,
The crushed powder particles are immediately introduced into the storage section 7 through the filter 25, and the particle size becomes large.

The cross-sectional area of the introduction opening 10 is made smaller than the maximum opening area of the circulation port 22 to prevent the pressure in the storage section 7 from becoming greater than the pressure in the grinding chamber 16, so that the powder particles generate heat due to frictional heat and quality deteriorates. Make sure it doesn't get damaged.

According to the present invention, the guide plate that partitions the introduction opening and the discharge opening in the storage part communicating with the grinding chamber is formed approximately parallel to the introduction direction of the powder particles introduced from the introduction opening, so that the powder particles are transferred to the storage part. The powder is deposited on the opposite side of the introduction opening, making full use of the volume of the reservoir, and the guide plate does not create resistance, allowing the powder to be smoothly fed into the reservoir, allowing the powder to be discharged from the reservoir. Without a problem,
It can improve the efficiency of crushing beans.

In addition, the powder particles crushed by the cutter to a predetermined particle size or less are sent to the storage part, so that the particle size of coffee beans etc. becomes uniform, and the powder particles crushed by the cutter smoothly flow out from the filter and are prevented from clogging in the grinding chamber. There is no risk of heat generation due to friction, etc., and there is no risk of changes in quality that would impair aroma or taste.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a pulse crusher showing an embodiment of the present invention with the lid removed, and FIG.
3 is a sectional view of the lined part in FIG. 1, FIG. 4 is a sectional view of the lined part in FIG.
The figure is an enlarged perspective view of the recirculation opening portion of the same. 7...Storage part, 10...Introduction opening, 11...Discharge opening, 13...Guide plate, 14...Fan, 16
...Crushing chamber, 24...Opening, 25...Filter, 26...Cutter.

Claims (1)

[Scope of Claims] 1. A grinding chamber in which a rotary cutter is disposed and a filter is provided at the opening, and a storage section that communicates with the opening of the grinding chamber and stores the powder particles that have passed through the filter;
A fan that generates wind to transport the powder particles that have passed through the filter, partitions an introduction opening communicating with the grinding chamber opened in the storage portion and a discharge opening, and introduces the powder particles introduced through the introduction opening. A pulse crusher characterized in that a guide plate formed substantially parallel to the direction is provided in the storage section. 2. The introduction opening and the discharge opening are formed on substantially the same plane, the discharge opening is formed at substantially the same position as or above the introduction opening, and the guide plate is formed to protrude substantially at or below the lower edge of the introduction opening. A pulse crusher according to claim 1.