JPS6053659B2 - Pulses grinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a grinder for grinding beans such as coffee beans, and relates to a grinder for discharging beans ground by 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 released through the suction air generated by a fan, so that the coarseness of the powder particles is approximately constant, and there is no risk of the aroma or taste changing due to heating, etc. BACKGROUND OF THE INVENTION Mills for grinding coffee beans and other legumes that can be processed quickly have been developed.

In this pulverizer, as shown in Fig. 1, it is thought that a hopper chamber 2 is formed above the pulverizing chamber 1 so that beans can be continuously supplied to the pulverizing chamber 1.
--,゜klL゛,0=Ha8 A vortex is generated near the tuyere 3, and the fine powder particles generated during crushing are caught up in the vortex and are not flowed out of the crushing chamber 1, and the pulverized powder particles are Even if the air flow generated by a fan is used to transport the hopper chamber 2
At locations other than the opening 3, the fine powder particles are rotated along the inner wall of the grinding chamber 1 by the rotational force generated by the rotation of the cutter.
It has the drawback that it does not flow out of the crushing chamber 1 and is inefficient. The present invention was made in view of the above drawbacks, and includes forming a ventilation section around the opening that communicates the hopper chamber and the grinding chamber,
The purpose of the present invention is to provide a pulse pulverizer that prevents stagnation of fine particles due to turbulent flow and improves efficiency.

Next, the configuration of an embodiment of the present invention will be explained with reference to FIGS. 2 and 3. A base 11 has an electric motor 12 built therein, and a drive shaft 13 of the electric motor 12 protrudes from the upper surface of the base 11.

A ventilation chamber 14 in which a protrusion of the drive shaft 13 is located and a duct portion 15 communicating with the ventilation chamber 14 are formed on the upper surface of the base 11. Also this base 1
Storage chamber 1 at the bottom of one side of 1? Storage case 18 forming
A mounting portion 19 is integrally provided.

At the top of one side of this storage case 18 is a storage case 1.
An opening 20 is formed which communicates with the tag section 15 when the tag 8 is placed on the mounting section 19.

Further, an exhaust portion 22 is formed in a lid 21 that can open and close the upper opening of the storage case 18 . Also 2
3 is a fan, which is attached to the drive shaft 13 so as to face the ventilation chamber 14.

Next, 24 is a case body in which a crushing chamber 25 and a hopper chamber 26 are formed, and is formed by a base case member 27 and a crushing unit case member 28. This base case member 27 is attached to the base 11 by a clamp (not shown) or are detachably connected with screws.

Also, the base case member 2 placed on the top surface of this base 11
The ventilation chamber 14 is connected to the bottom opening surface of 7 and the top surface of the base 11.
A duct portion 15 is formed.

Further, a filter receiving portion 29 is formed in a step-like notch on the inner periphery of the upper surface opening in the base case member 27 . Further, the hopper chamber 26 is a crushing chamber 25 of the crushing section case member 28.
A plurality of vents 32 communicating with the grinding chamber 25 are formed in the bottom part 31 which slopes downward toward the center of the hopper chamber 26 with the opening 30 formed in the center thereof. are formed radially around the opening 30.

This ventilation portion 32 is formed to a size that does not allow the passage of beans. Next, reference numeral 33 denotes a filter, which is formed in the shape of a mesh that allows powder particles of a predetermined particle size to pass through. The pulverizer case member 28 is clamped to the periphery of the upper surface at the lower end opening of the pulverizer case member 28.

Reference numeral 34 denotes a blade cutter, which has a blade portion 180 offset and is detachably attached to the tip of the drive shaft 13 close to above the filter 33 . A fan 23 is disposed at the opening of the grinding chamber 25, and is located at a tangent to the rotational direction of the fan 23 to form the duct 1.
5 is coming.

Reference numeral 35 denotes a lid body that freely opens and closes the upper opening of the case body 24, and has a protrusion that engages with the engagement step of the crusher case member 28, and a central part of the lid body 35. A ventilation hole 36 is formed above the cutter 34. Next, the operation of this embodiment will be explained.

When grinding beans, for example, coffee beans, the coffee beans are put into the hopper chamber 26 of the case body 24, and when the electric motor 12 is driven with the top surface of the hopper chamber 26 of the case body 24 closed with the lid body 35, the cutter 34 is ground. The fan 23 rotates, and the coffee beans are ground by the rotation of the cutter 34.

At this time, the air is sucked in through the ventilation hole 36 by the drive of the fan 23, passes through the opening 30 of the hopper chamber 26, the ventilation section 32, and the crushing chamber 25. A flow of air is generated to be discharged to the exhaust part 22, and the coffee beans crushed by the cutter 34 and having a predetermined particle size or less pass through the filter 33 located at the bottom of the cutter 34 by stirring this air and the cutter 34. It is discharged to the outside of the filter 33, sent directly to the ventilation chamber 14 from the crushing chamber 25, and then sent to the storage case 1 through the duct section 15.
8 into the storage chamber 17. This air flow also cools the coffee beans or ground powder. An opening 30 of the hopper chamber 26 communicates with the grinding chamber 25.
In the ventilation section 32 opened around the opening 30 of the hopper chamber 26, fine powder particles are smoothly flowed out into the ventilation chamber 14 without creating a vortex around the opening 30 of the hopper chamber 26. Further, a windshield plate 37 is provided in the storage chamber 17 facing the discharge part of the duct part 15 to prevent the powder particles discharged from the duct part 15 from being immediately discharged from the exhaust part 22.

Furthermore, when the filter 33 is removed from the receiving part 29, the filter 33 can be removed after removing the crusher case member 28 and the cutter 34. Can be exchanged.

Next, another embodiment will be described with reference to FIGS. 4 and 5. In the structure of the above embodiment, the bottom part 3 of the hopper chamber 26
A ventilation section 32a formed around the opening 30 of No. 1 is continuous with the opening 30, and the ventilation section 32. The edge of the cutter 34 is made flush with the inner surface of the grinding chamber 25, and a part of the air flow sucked in from the ventilation hole 36 of the lid body 35 flows from the hopper chamber 26 along the inner wall of the grinding chamber 25. The powder particles flow along the inner wall of the grinding chamber 25 due to the rotational force generated in the ventilation section 32. When the powder particles reach the position shown in FIG. 1, they are sucked into the ventilation chamber 14 from the grinding chamber 25, and the efficiency of extracting the particles can be increased.

According to the present invention, the ventilation section is formed around the opening of the hopper chamber that communicates with the grinding chamber, so that the air flow in the grinding chamber becomes a laminar flow and the ground particles stay in the grinding chamber. Because there is no heat in the grinding chamber, uniform powder particles are obtained without excessive grinding in the grinding chamber, and no heat is applied to the powder particles.
In particular, it is suitable for grinding coffee beans because 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 cross-sectional view of the hopper chamber of a conventional pulse crusher, Fig. 2 is a cross-sectional view of a pulse crusher showing an embodiment of the present invention, and Fig. 3 is a plan view of the same with the upper lid removed. FIG. 4 is a plan view of another embodiment of the pulse crusher with the lid removed, and FIG. 5 is a cross-sectional view of the hopper chamber of the same. 17...Storage chamber, 25...Crushing chamber, 2
6...hopper chamber, 30...opening,
32, 32a... Ventilation section, 33... Filter, 34... Cutter.

Claims (1)

[Claims] 1. A grinding chamber in which a rotary cutter is arranged and a filter is provided in the lower opening, a storage chamber communicating with the lower opening of the grinding chamber and storing the powder particles that have passed through the filter, and an upper part of the grinding chamber. 1. A pulse crusher comprising: a hopper chamber communicating with the grinding chamber through an opening, and a ventilation section formed around the opening through which the crushing chamber and the hopper chamber communicate with each other.