US 5,257,574 A · Coffee bean roasting device

Abstract

A coffee bean roasting device for roasting coffee beans by applying hot air to the coffee beans. The coffee bean roasting device includes a detector for detecting a factor exerting influence upon the roasting state of coffee beans, and a controller for controlling the hot air supplier and/or exhaust discharger in accordance with a detection signal input from the discharger. The controller may be, for example, an electronic control portion such as computer including a pressure sensor for detecting a pressure value of the roasting space as a factor exerting influence upon the roasting state of coffee beans and adapted to record a pressure value input from the pressure sensor in a particular roasting state of coffee beans as a particular pressure value and control the exhaust discharger to regulate the amount of exhaust gas on a basis of the pressure value input from the pressure sensor, such that the pressure value of the roasting space becomes such recorded particular pressure value as a target value.

Claims8

Dependent claims

In a coffee roasting device having a roasting space in a roasting container for receiving coffee beans, and hot air supplying means and exhaust gas discharging means communicating with said roasting space, the improvement comprising:

temperature and pressure detecting means for detecting temperature and pressure conditions in the roasting space which influence a roasting state of the coffee beans, said temperature and pressure detecting means including means for supplying detection signals;
control means for controlling at least one of said hot air supplying means and said exhaust gas discharging means in response to a present detection signal;
and
recording means for recording and accumulating detection signals from previous roasting states of the coffee beans;
said control means including means for selecting a previous detection signal from the recorded detection signals, said previous detection signal corresponding to a desired roasting state to be reproduced, said control means including means for causing said present detection signal to equal said previous detection signal thereby causing said coffee beans to be roasted into the desired roasting state.

2 more elements

In a coffee bean roasting device for roasting coffee beans having a roasting space for receiving coffee beans in a roasting container, a heat supplying means for supplying heat to the roasting space, and an exhaust gas discharging means for discharging exhaust gas from the roasting space, the improvement comprising:

a first pressure sensor for sensing pressure values within said roasting space;
a temperature sensor for sensing temperature values within said roasting space;
control means for receiving said pressure and temperature values;
recording means for recording and accumulating pressure values from previous roasting states of the coffee beans;
and
said control means including means for selecting a previous pressure value from the recorded pressure values and means for controlling the exhaust discharging means in response to a current pressure value from within the roasting space so that the current pressure value substantially equals the previous pressure value.

3 more elements

Dependencies are inferred from the claim text.

Coffee bean roasting device

Life of this patent

Coffee bean roasting device

Life of this patent

Abstract

Claims8