Roasting machine

Abstract

To provide a device capable of preventing smoke generation and ignition from a heating object which may occur due to overheating when the air flow to an air channel from a fan unit into which the air flows slows down, a turning speed of the heating object attenuates and stops according an oil content and stain from the heating object such as beans turning in a roasting container during roasting of coffee beans and the like.SOLUTION: A roasting machine 1 includes a temperature sensor disposed between a roasting container having slits and a heater unit, and includes a structure that can detect temperature rise following the stop of turning of beans in the roasting container. The variation in a rotation speed value with respect to a Duty ratio during the turning stop is detected by a fan unit including an air blower which has a function that outputs rectangular wave signals convertible into the rotation speed value. The roasting machine is made of a structure that can perform Duty ratio correction in combination with the temperature sensor and prevents smoke generation and ignition in advance.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a device for preventing smoking, ignition, and burns in a roasting machine. A roasting machine is a device used when roasting green coffee beans, and the purpose of the present invention is to improve its safety.

Background Art

[0002] Conventionally, as a roasting machine used when roasting green coffee beans, a hot air roasting machine has been widely used. The hot air roasting machine sucks air from an air inlet in the housing, heats the air through a heater unit, and heats and roasts the beans in a roasting container. Conventionally, in the hot air roasting machine, by roasting the beans with an amount of oil or the like exceeding the specified amount, the rotation of the beans in the roasting container stops, the beans are overheated, smoke is generated, and there is a possibility of ignition.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Conventional roasting machines have a problem that the rotation of the beans in the roasting container stops, the beans being roasted are locally heated, resulting in smoke and ignition, and leading to injury accidents such as burns to the user.

Means for Solving the Problems

[0005] The present invention can prevent the beans being roasted from being locally heated, smoke, and ignition by installing a device capable of detecting the stop of the rotation of the beans during roasting in the roasting machine.

Effects of the Invention

[0006] According to the present invention, the roasting machine 1 has a structure that detects the stop of the rotation of the beans in the roasting container 2 by a plurality of means and is equipped with a device for preventing smoking, ignition, and burns. As a result, the safety of the roasting machine 1 is improved, and it becomes possible to reduce accidents that injure users.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiments for Carrying Out the Invention

[0008] As shown in FIG. 2, the roasting machine 1 of the present embodiment includes a housing 3, a fan unit 4 including a blower device that sucks air from an air inlet in the housing 3 and outputs a rectangular wave signal that can be converted into a rotational speed value of a fan, and a heater unit 5 that heats the air flowing in from the air inlet and has a temperature sensor for measuring the heating temperature. An exhaust port 7 for discharging the heated air to the outside of the housing 3, and a wind tunnel structure 9 having an air passage for guiding the heated air sucked by the fan unit 4 to the exhaust port 7, and a detachable roasting container 2 having a slit for providing an air inflow angle and a roasting chamber. The roasting machine 1 has a structure in which a flame detection sensor 8 for detecting ignition of beans is mounted in the housing 3.

[0009] As an embodiment of the invention, the wind tunnel structure is made of a metal material.

[0010] As an embodiment of the invention, the metal material of the wind tunnel structure is aluminum.

[0011] As an embodiment of the invention, the roasting container is detachable.

[0012] As the shape of the slit of the roasting container, it is a conical shape that makes the air heated by the heater unit into a swirling flow inside the roasting container.

[0013] The slit of the roasting container is made of a metal material.

[0014] As an embodiment of the invention, the metal material of the slit of the roasting container is formed of stainless steel.

[0015] As an embodiment of the invention, the detection sensor is formed of a phototransistor and detects near-infrared rays of approximately 800 nm to 1100 nm.

[0016] In the roasting container, it is formed of glass and aluminum to improve the visibility of visually checking the swirling situation of the beans and the degree of roasting, and the glass has a double structure to improve heat insulation.

[0017] In the roasting container, since the oil content of the roasted beans adheres to the glass and aluminum, a vent sheet that prevents the intrusion of moisture is attached to the double-structured glass so that it can be washed with water.

[0018] As an embodiment of the invention, it has a chaff container for storing the chaff of the beans separated by a cyclone structure that forms the wind tunnel structure.

[0019] The chaff container is detachable and is made of a metal material.

[0020] The metal material of the chaff container is aluminum.

[0021] The roasting machine is equipped with a detection switch for discriminating the attachment / detachment and insertion of the chaff container, and when it is not inserted, the roasting cooking is stopped by a microcomputer that controls the operation of the roasting machine.

[0022] In the roasting machine, the chaff container is pushed out by the swirling flow passing through the wind tunnel structure from the heater unit and becomes detachable, so a locking mechanism is provided.

[0023] The roasting machine has a detection switch for discriminating the attachment / detachment and insertion of the detachable upper cover air passage structure constituting the wind tunnel structure, and when it is not inserted, the microcomputer that controls the operation of the roasting machine stops the roasting process.

Example

[0024] By monitoring the output signal of the blower device having a function of outputting a signal convertible into a rotation speed value constituting the fan unit 4 and having a control structure for converting from a rectangular wave signal into a rotation speed value, deceleration control or control maintenance of the duty ratio is implemented at STATE12 and STATE13 in FIG. 3. After detecting the variation of the rotation speed value with respect to the duty ratio, while referring to the set temperature, target temperature, and current temperature data in STATE8, the output voltage of the blower device is controlled by correcting the duty ratio in STATE6 to promote the re-swirling of the beans, thereby preventing the occurrence of smoking and ignition accompanying the stop of the beans.

Example

[0025] In addition to the above Example 1, in a roasting machine having a structure in which the roasting container 2 is arranged above the heater unit 5 and the space between the lower part of the roasting container 2 and the upper part of the heater unit 5 is blocked, when the temperature of the blocked part changes rapidly with the stop of the swirling of the beans, in state 1 of FIG. 4, it is detected by the temperature sensor installed between the slits of the heater unit 5 and the roasting container 2 that the set temperature or target temperature has been exceeded. By using it in combination with Example 1, the temperature inside the roasting container 2 drops as in state 2 in FIG. 4, and temperature control or air volume adjustment is implemented to prevent damage to the housing and burns to the user caused by smoking and ignition from the beans or the like.

Example

[0026] In the above Example 1 or Example 2, after detecting the rotation stop of the beans, the voice alarm, warning lamp, or error indicator is automatically activated to prompt the user to pay attention to the equipment operation and instruct the user to unplug the power plug, etc., thereby preventing the user from being scalded or the housing from being damaged.

Explanation of Signs

[0027] 1 Roaster 2 Detachable roasting container 3 Housing 4 Fan unit 5 Heater unit 6 Slit 7 Exhaust port 8 Flame detection sensor 9 Wind tunnel structure

Claims

Claim 1 A roasting machine that detects the stoppage of the rotation of beans in a roasting container by one or more means during roasting to prevent smoking, ignition, and burns. Claim 2 The roasting machine according to claim 1, comprising a fan unit having a blower device capable of outputting a signal convertible into a rotation number value, detecting a static pressure load fluctuation when the rotation of the beans in the roasting container stops, and detecting the stoppage of the rotation of the beans. Claim 3 The roasting machine according to claim 1, having a temperature sensor near the roasting container, detecting an increase in temperature near the bottom of the roasting container due to the stoppage of the rotation of the beans, and preventing burns to the user and damage to the housing.

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