KR-20260066432-A - Stove using coffee ground pellets

KR20260066432AKR 20260066432 AKR20260066432 AKR 20260066432AKR-20260066432-A

Abstract

The present invention relates to a non-powered pellet stove capable of achieving excellent combustion efficiency and complete combustion without power consumption by improving combustion efficiency by generating a natural airflow without using a motor to supply air into the combustion chamber, and supplying pellet fuel, such as coffee grounds pellets, by free-falling it into the combustion chamber without power. The non-powered pellet stove according to the present invention comprises: a base frame placed on a floor surface; a combustion chamber disposed on one side of the base frame and having a roast stall provided in its internal space; a pellet supply unit connected to the upper part of the combustion chamber to supply pellets to the roast stall by dropping them by gravity; a flue pipe installed on the other side of the base frame in communication with the combustion chamber to discharge combustion gases generated in the combustion chamber to the outside and simultaneously release the heat of the combustion gases to the outside; and a combustion material collection container installed at the lower part of the combustion chamber in communication with the roast stall to collect combustion materials falling through the roast stall. and may include an air acceleration tunnel that is in the form of a tube with both ends open and installed so that the open ends communicate with the inside and outside of the combustion chamber, introducing air from outside the combustion chamber and blowing it toward the roastol.

Inventors

변옥란
황지영

Assignees

변옥란
황지영

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (15)

A base frame placed on the floor surface; A combustion chamber disposed on one side of the above-mentioned base frame and having a roasting chamber provided in the internal space; A pellet supply unit connected to the upper part of the combustion chamber and supplying pellets to the roastol by dropping them by gravity; A flue pipe installed on the other side of the base frame to communicate with the combustion chamber, which discharges combustion gases generated in the combustion chamber to the outside and simultaneously releases the heat of the combustion gases to the outside; A combustion material collection container installed in communication with the roastol at the lower part of the combustion chamber to collect combustion material falling through the roastol; and, An air acceleration tunnel formed with both ends open and installed so that the open ends communicate with the inside and outside of the combustion chamber, introducing air from outside the combustion chamber and ejecting it toward the roastol; A non-powered pellet stove including
In paragraph 1, The above air acceleration tunnel is a non-powered pellet stove in the form of a tapered tube or duct in which the diameter of the inner end adjacent to the roastol is smaller than the diameter of the outer end communicating with the outside of the combustion chamber.
In paragraph 1 or 2, The above air acceleration tunnels are a non-powered pellet stove in which multiple tunnels are arranged laterally at spaced intervals.
In paragraph 1 or 2, The above-mentioned air acceleration tunnel is, A non-powered pellet stove comprising a lower air acceleration tunnel horizontally installed at the lower front side of the combustion chamber and blowing air toward the roastol, and an upper air acceleration tunnel installed above the lower air acceleration tunnel to communicate with the inside and outside of the combustion chamber and blowing air into the upper space of the combustion chamber.
In paragraph 1 or 2, The above-mentioned air acceleration tunnel is, A non-powered pellet stove comprising a front air acceleration tunnel that blows air from the front part of the combustion chamber toward the front of the roast stall, and a rear air acceleration tunnel that blows air from the rear part of the combustion chamber toward the rear of the roast stall.
In paragraph 1 or 2, A non-powered pellet stove in which the air acceleration tunnel is installed inside the combustion chamber, and a tunnel communication hole corresponding to the outer end of the air acceleration tunnel is formed penetrating one side of the combustion chamber.
In paragraph 1, The above-mentioned roastol is formed in the shape of a grill having a pattern in which a plurality of groups of round bars, each group of round bars arranged at intervals equal to the average diameter of the pellets, are arranged at intervals 1 to 2 mm larger than the average diameter of the pellets, and is installed at the lower part of the combustion chamber at a downward inclination facing forward at a certain angle.
In paragraph 1 or 7, The above-mentioned Rostol is a non-powered pellet stove in which multiple round bars are arranged in a zigzag pattern vertically along the lateral direction.
In paragraph 1, The above pellet supply unit is, A non-powered pellet stove comprising a pellet storage container positioned on the upper part of the base frame for storing pellets, and a fuel chute installed at a downward inclination at a certain angle, with the upper end communicating with the lower end of the pellet storage container and the lower end communicating with the combustion chamber, for dropping and supplying pellets inside the pellet storage container into the combustion chamber.
A non-powered pellet stove according to claim 9, further comprising a heat-insulating wall member installed between the fuel chute and pellet storage container and the combustion chamber and flue pipe to block heat from the combustion chamber and flue pipe from being transferred to the fuel chute and pellet storage container.
In paragraph 1, A non-powered pellet stove further comprising a porous secondary combustion plate installed on the upper part of the above-mentioned collection container to receive and burn combustion materials and unburned pellets falling through the above-mentioned roasting chamber.
In Paragraph 11, The above secondary combustion plate is a non-powered pellet stove installed with a downward slope in the front-rear direction or both directions starting from the center.
In Article 1 or Article 9, A non-powered pellet stove further comprising a vibration module that transmits vibration to the pellet supply unit so that pellets fall smoothly from the pellet supply unit to the Rostolo.
In Paragraph 13, The above vibration module is a non-powered pellet stove comprising a vibrating plate installed such that its lower part is attached to the base frame and its upper part extends upward, and a vibrator installed on the vibrating plate that vibrates by power supplied from a battery.
A non-powered pellet stove according to claim 1, further comprising an air passage plate installed on the lower side of the collection container at a certain distance from the lower surface of the collection container to form a lower air passage through which external air is introduced and then discharged.

Description

Non-powered pellet stove {Stove using coffee ground pellets} The present invention relates to a pellet stove that uses pellets, such as coffee grounds pellets, as fuel, and more specifically, to a non-powered pellet stove that improves combustion efficiency by naturally accelerating and supplying airflow into the combustion chamber without using a motor, and supplies pellet fuel, such as coffee grounds pellets, by free-falling it into the combustion chamber in fixed amounts, thereby providing excellent heating performance without consuming electricity. Coffee grounds are produced after extracting coffee beverages from coffee powder formed by grinding roasted coffee beans, and are referred to as coffee residue, coffee waste, and coffee by-products. The calorific value of these coffee grounds is approximately 4,600 kcal/kg, which is higher than the calorific value of Grade 1 wood pellets, which is 4,300 kcal/kg. As a result, coffee grounds pellets are being widely used as fuel recently, instead of wood pellets. However, conventional pellet-fueled stoves require the installation of a separate blower fan and fan motor to supply air for combustion into the combustion chamber; this results in high manufacturing and maintenance costs, and presents the problem of being difficult to use in locations where connecting to a power source is challenging. Furthermore, as disclosed in Korean Registered Patent No. 10-1793182, conventional non-powered pellet stoves that supply pellet fuel via a free-fall method and do not use power have the disadvantage of being difficult to smoothly blow combustion air toward the roast stall where the pellet fuel is burned, resulting in low combustion efficiency and problems such as the generation of harmful gases due to incomplete combustion caused by the re-combustion of combustion gases remaining in the combustion chamber. FIG. 1 is a side view showing a non-powered pellet stove according to one embodiment of the present invention. FIG. 2 is a front view showing a non-powered pellet stove according to one embodiment of the present invention. FIG. 3 is a cross-sectional view from the side showing a part of a non-powered pellet stove according to one embodiment of the present invention. FIG. 4 is a front cross-sectional view showing a part of a non-powered pellet stove according to one embodiment of the present invention. FIG. 5 is a cross-sectional view showing another embodiment of an air acceleration tunnel constituting a non-powered pellet stove according to the present invention. FIG. 6 is a cross-sectional view showing one embodiment of a roastol constituting a non-powered pellet stove according to the present invention. FIG. 7 is a cross-sectional view of a key part of a non-powered pellet stove according to another embodiment of the present invention. FIG. 8 is a cross-sectional view from the side showing a part of a non-powered pellet stove according to another embodiment of the present invention. FIG. 9 is a front view of the combustion chamber door of the non-powered pellet stove illustrated in FIG. 8 in an open state. FIG. 10 is a perspective view of an air acceleration tunnel constituting the non-powered pellet stove illustrated in FIG. 8. FIG. 11a is a perspective view of a roastol constituting the non-powered pellet stove illustrated in FIG. 8. FIG. 11b is a cross-sectional view of the Rostol shown in FIG. 11a. FIG. 12 is a perspective view showing a vibration module constituting the non-powered pellet stove illustrated in FIG. 8. A non-powered pellet stove according to embodiments of the present invention will be described in detail with reference to the attached drawings. Since the present invention is susceptible to various modifications and may take various forms, specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed forms, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the present invention. Similar reference numerals have been used for similar components in the description of each drawing. In the attached drawings, the dimensions of the structures are depicted enlarged from the actual size to ensure clarity of the present invention, or reduced from the actual size to allow for understanding of the schematic configuration. Additionally, terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. Meanwhile, unless otherwise defined, all terms used herein, including technical or scientific terms, have th