CN112089078A - Small-sized closed coffee bean roasting machine - Google Patents

Abstract

The invention discloses a small-sized closed coffee bean roasting machine in the technical field of household coffee bean roasting, which comprises a shell and a base, wherein the shell is a sealed box body, and a stir-frying switch, a fire switch, a smoke exhaust switch and a sensor display are arranged on the base; the apron is sealed to be fixed in one side of shell, still be provided with the blast pipe on the apron, temperature and humidity sensor has still been installed on the apron, and the space that occupies is little, and the family or the laboratory of being convenient for uses, and it is all very simple to bake the pot clearance dismantlement, and this device is applicable to a small amount of coffee beans and cures processing more, the preparation of the miniature domestic pot that cures that more suits, and the operation is also simpler and easier, and this device also can bake coffee beans in airtight condition, and the process of this device curing coffee beans has avoided coffee beans and outside air contact, can effectually keep the temperature when coffee beans cure, can not receive the outside air influence.

Description

A small closed coffee bean roaster

technical field

The invention relates to the technical field of domestic coffee bean roasting, in particular to a small closed coffee bean roasting machine.

Background technique

The green coffee beans themselves do not have any coffee aroma. Only after they are roasted, they can smell the strong coffee aroma. Therefore, the roasting of coffee beans is the transformation process of the internal components of coffee beans. The ingredients that can release the aroma of coffee can smell the aroma of coffee.

The roasting quality of the coffee beans directly determines the aroma of the coffee beans. For badly roasted coffee, even if the green coffee beans are good, it is impossible to obtain good cooked coffee beans; the result is of course not delicious. Only by using good green coffee beans and properly roasted can we process good cooked coffee beans and provide a good precondition for making good coffee. In the roasting process of coffee beans, the ingredients The transformation of coffee beans is very complicated, after all, coffee beans are organic, so the transformation of this component is a very complicated process.

A chain of chemical changes occurs during the roasting process. After approximately 5-25 minutes of roasting (depending on the temperature chosen), the green beans will lose some of their moisture and turn yellow, during which time the beans will expand from a firm, dense green state Converts to a low-density fluffy state. During this process, the coffee beans will approximately double in volume and begin to show a light brown after light roasting. After this stage is completed (about 8 minutes of roasting), the heat will be reduced. . The color of the coffee quickly turns dark, and when the preset roasting depth is reached, cold air can be used to cool the coffee beans to stop the roasting process;

Baking is roughly divided into light baking (Light), medium baking (Medium), city baking (City) and deep (Deep) baking;

Lightly roasted coffee beans: will have a strong smell, very crisp, high acidity is the main flavor and slight body;

Medium roasted coffee beans: have a strong body, but also retain a certain acidity;

Urban roasted coffee beans: the surface has a darker brown color, the acidity is replaced by a slight burnt bitterness, and the flavor is mostly destroyed;

Dark roasted beans: Dark brown in color, oily on the surface, noticeably increased body and decreased acidity for most beans.

In the past, the roasting of coffee beans needed to rely on the experience of roasters. Not only was the processing efficiency low, the yield was low, but it was also very prone to errors. There was no standardization for each step, and it was unknown how the coffee beans changed during roasting. With the advancement of technology and the formulation of coffee bean roasting standards, the roasting of coffee beans can be standardized and easier to operate.

Coffee bean roaster is a food processing equipment. Because its mechanical structure and electronic control system do not have too high technical difficulties, its theoretical research and design and development content have not entered major universities and major professional research institutions at home and abroad. Roasters are mainly concentrated in small and medium-sized companies in the coffee industry. At present, there are few domestic coffee bean roasters, and most of them are large commercial roasters. At the same time, most of these roasters have complex structures, difficult disassembly and assembly, and poor cleaning. Convenience and other issues, these are not suitable for laboratory research on coffee beans; and now more and more people have their own unique preferences for the taste of coffee, and are no longer satisfied with the mass roasting of coffee bean manufacturers. , so now there is a great need for a simple and small roasting machine that people can roast coffee beans themselves according to their own taste preferences.

Based on this, the present invention designs a small enclosed coffee bean roaster to solve the above problems.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a small enclosed coffee bean roaster, which occupies a small space and is convenient for home or laboratory use, and the roasting pot is easy to clean and disassemble, and there is no large roaster passing through the heart of the roasting pot. There is no shaft, and there are no complicated instruments, which makes the device more suitable for roasting a small amount of coffee beans, more suitable for the production of miniature household roasting pots, and easier to operate.

The present invention is achieved in this way: a small closed coffee bean roaster, comprising:

Shell and base, the shell is a sealed box, the shell can be opened with a flip cover, the shell is stably fixed on the base, and the base is provided with a stir-fry switch, a fire switch, a row Smoke switches and sensor displays;

A cover plate, the cover plate is sealed and fixed on one side of the casing, a plurality of casing air inlets are evenly opened on the side of the casing close to the cover plate, and a discharge port is set on the cover plate, and the discharge port is provided on the cover plate. A discharge door can be opened and closed on the mouth, an exhaust pipe is also arranged on the cover plate, and a temperature and humidity sensor is also installed on the cover plate;

A door closing mechanism, which controls the opening or closing of the discharge door outside the casing;

A baking pot, the baking pot is a barrel-shaped structure with one side open, a plurality of ventilation holes are evenly opened on one side of the closed bottom of the baking pot, and the baking pot can be rotatably erected in the inner cavity of the shell, The opening side of the baking pot and the axis of the bottom of the pot are the same straight line and are arranged horizontally, the cover plate is close to and covers the opening side of the baking pot, and the cover plate and the baking pot are in clearance fit;

a driving device, the driving device is a power source for the rotation of the baking pan;

Intake condensing pipe, the air intake condensing pipe is arranged in the outer casing, the air inlets of the plurality of casings are all connected to the air inlets of the air intake condensing pipe, and the air outlet of the air intake condensing pipe is connected to the heating extension pipe connection, an electric heater is also arranged in the outer shell, the electric heater is arranged close to the baking pot, the heating extension pipe is also arranged close to the electric heater, and the air outlet of the heating extension pipe is connected to the bottom of the baking pot. The ventilation holes are in the same cavity;

an air suction device, the air inlet of the air suction device can be separated and communicated with the outlet of the exhaust pipe, and the inlet of the exhaust pipe is communicated with the inner cavity of the baking pot;

The suction device is electrically connected to an external power supply through a smoke exhaust switch, the driving device is electrically connected to an external power supply through a stir-fry switch, the electric heater is electrically connected to an external power supply through a fire switch, and the sensor display is connected to the temperature and humidity. The sensor data is connected, and the sensor display is electrically connected with an external power supply.

Further, a plurality of baking pan support rods are horizontally erected in the outer shell, and each of the baking pot support rods is installed with at least a rotating wheel and a limit support wheel, and the rotation wheel and the limit support wheel are both. A guide wheel, an outer ring of the limit support wheel is provided with a locking groove, a limit ring is protruded on the outer ring of the baking pan, and the limit ring can be rotatably clamped in the locking groove of the limit support wheel.

Further, the inner cavity of the shell is composed of a rotating equipment room and a heating room, the electric heater is evenly distributed in the whole heating room horizontally, the electric heater is arranged directly below the baking pot, and the heat extension pipe is The air outlet is close to the outside of the lowermost ventilation hole, the diameter of the ventilation hole is less than three millimeters, the exhaust pipe is arranged on the top of the opening side of the baking pot, the electric heater is a carbon fiber heating pipe, and the The electric heater extends horizontally from the open end of the baking pan to below the air outlet of the heating extension pipe.

Further, the drive device is a motor, a drive wheel is fixed on the output end of the drive device, the drive wheel is connected with the drive wheel through a transmission belt, the drive wheel is fixedly connected with a drive shaft, and the other side of the drive shaft is fixed. One end is detachably connected to the center of the outer circle of the bottom of the baking pan by means of bolts.

Further, there is an opening on the top of the casing, the flip cover is mounted on the casing through a hinge, the flip cover covers the top opening of the casing, and the length and width of the baking pan are smaller than the opening length of the top of the casing after the flip cover is turned over. and width, the flip cover and the inner wall of the shell are covered with thermal insulation cotton, and the thermal insulation cotton does not block the air inlet of the shell.

Further, a guide nozzle is also fixed on the cover plate, the guide nozzle is a groove-like structure with an open top, the top opening of the guide nozzle is close to the bottom of the discharge door, and the cover plate is The downwardly inclined opening is provided with a sampling port, the sampling port is communicated with the inner cavity of the baking pan, and a sampler can be inserted in the sampling port detachably.

Further, the sampler is a rod-shaped structure, one end of the sampler is provided with a sampling cavity, the other end of the sampler is a handle, the middle section of the sampler is fixed with a clamping piece, and the The sampler, the left side of the clamping piece on the sampler is a straight cylindrical structure, the left side of the sampler is a clearance fit with the sampling port, the clamping piece covers the entire sampling port, and the clamping position The piece cannot pass through the sampling port.

Further, the door closing mechanism includes a rotating wheel, a rotating rod, a first connecting rod, a second connecting rod and a third connecting rod, the rotating wheel is fixedly connected with the rotating rod, and the rotating rod is fixed with the first connecting rod The third connecting rod is fixedly connected with the top cross bar of the discharge door, and the fixed end of the third connecting rod and the discharge door can be rotated but cannot be moved. Installed on the cover plate, the movable end of the first connecting rod and the movable end of the third connecting rod are respectively connected to the two ends of the second connecting rod through the rotating shaft, and the second connecting rod is not connected with the cover plate, so The runner, the rotating rod, the first connecting rod, the second connecting rod, the third connecting rod and the discharging door form a plane four-bar mechanism.

Further, an airtight cover is also fixed on the discharge door. When the discharge door is closed, the airtight cover is filled in the discharge port, and the gap between the cover plate and the baking pan is less than 2 mm.

Further, a timer is also set on the base, the timer is electrically connected with the electric heater, and the suction device is a fan.

The beneficial effects of the present invention are: by changing the structure of the roasting pot, the originally large coffee bean roasting machine allows miniaturized assembly from the structure. And to maintain the uniformity of baking, it is necessary to pass a rotating shaft in the baking pot to support and drive the balanced rotation of the large baking pot, and in order to stir evenly, it is necessary to add a variety of stirrings to the rotating shaft. However, because this device uses a miniature baking pot, there is no drive shaft passing through it. Only the baking pot can have several stirring blades as a whole, and it is supported by an external support rod. This device can also pass through the flip cover Open the shell to clean the roasting pot, and the roasting pot can be disassembled for cleaning. The device also enables a small roaster to roast coffee beans under airtight conditions, and the roasting process of the device avoids coffee beans. Contact with external air can effectively maintain the temperature of coffee beans when roasting, and will not be affected by external air, which can effectively prevent the roasting process from being too cold for a while and too hot for a while. , When the external dry air is drawn into the baking pot, let the cold air preheat in the heating extension pipe to prevent the cold air from directly rushing into the baking pot, effectively preventing the temperature drop of the baking pot, and better controlling the temperature in the baking pot. The processing temperature and humidity also meet the requirements of the semi-direct fire and semi-hot air roasting method of coffee beans, keep the roasting pot in a relatively isolated environment, and are no longer greatly affected by the external temperature and humidity, and the rotation of the roasting pot of this device The method is the same as the rolling method of a large coffee bean roaster, which makes it easier to roast the coffee beans evenly. This device has the structure and volume of a small coffee bean roaster, and has both the effect and roasting of a large coffee bean roaster. craft.

Description of drawings

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Fig. 1 is the overall structure schematic diagram of the present invention;

Fig. 2 is the side structure schematic diagram of the present invention;

Fig. 3 is the top view of the inner structure of the shell of the present invention;

Fig. 4 is the front schematic diagram of the internal structure of the shell of the present invention;

5 is a schematic diagram of the external structure of the cover plate of the present invention;

6 is a cross-sectional view of a cover plate and a baking pan of the present invention;

7 is a schematic diagram of the internal structure of the baking pot of the present invention;

8 is a schematic diagram of the overall front structure of the present invention;

Fig. 9 is the structural representation of the sampler of the present invention;

Figure 10 is a schematic diagram of the structure of the discharge door of the present invention.

Detailed ways

1 to 10, the present invention provides a technical solution: a small enclosed coffee bean roaster, comprising:

Shell 1 and base 2, the shell 1 is a sealed box, a flip cover 11 can be opened and locked on the shell 1, the shell 1 is stably fixed on the base 2, and the base 2 is provided with Stir fry switch 21, fire switch 22, smoke exhaust switch 23 and sensor display 26;

Cover plate 5, one side of the casing 1 is the cover plate 5, the side of the casing 1 close to the cover plate 5 is evenly provided with a plurality of casing air inlets 12, and the cover plate 5 is provided with a discharge port 57. A discharge door 53 can be opened and closed on the discharge port 57, an exhaust pipe 52 is also provided on the cover plate 5, and a temperature and humidity sensor 56 is also installed on the cover plate 5;

The door closing mechanism 3, the door closing mechanism 3 controls the opening or closing of the discharge door 53 outside the casing 1;

Baking pot 9, described baking pot 9 is a barrel-shaped structure with an opening on one side, and a plurality of ventilation holes 92 are evenly opened on one side of the closed bottom of said baking pot 9, and described baking pot 9 can be rotatably erected In the inner cavity of the casing 1, the opening side of the baking pot 9 and the axis of the bottom of the pot are on the same straight line and are arranged horizontally. The cover plate 5 abuts against and covers the opening side of the baking pot 9. 9 is clearance fit;

The driving device 4, the driving device 4 is the power source for the rotation of the baking pan 9;

The intake condensing pipe 7 is arranged in the casing 1, and the plurality of casing air inlets 12 are all connected to the air inlets of the intake constricting pipe 7, and the intake constricting pipe 7 The air outlet is connected to the heating extension pipe 72, an electric heater 71 is also arranged in the outer casing 1, the electric heater 71 is arranged close to the baking pot 9, and the heating extension pipe 72 is also arranged close to the electric heater 71, so The air outlet of the heating extension pipe 72 is in the same cavity as the ventilation hole 92 at the bottom of the baking pot 9;

The suction device 8, the suction port of the suction device 8 and the outlet of the exhaust pipe 52 can be separated and communicated, and the inlet of the exhaust pipe 52 is communicated with the inner cavity of the baking pot 9;

The suction device 8 is electrically connected to the external power supply through the smoke exhaust switch 23 , the driving device 4 is electrically connected to the external power supply through the stir-fry switch 21 , and the electric heater 71 is electrically connected to the external power supply through the fire switch 22 . The sensor display 26 is data-connected to the temperature and humidity sensor 56, and the sensor display 26 is electrically connected to an external power supply. Such a structure enables the device to be in a semi-direct fire and semi-hot air roasting method for coffee beans, and effectively avoids the need for the device to be roasted. The cooler outside air is directly blown on the coffee beans in the roasting pot 9, and the humidity of roasting can be effectively controlled by the suction device 8. The closed structure can control the roasting temperature more effectively and can maintain the stability of roasting temperature and humidity. , and can monitor and control the temperature and humidity of the device, so that the device, as a small coffee bean roaster, can take samples and monitor the entire process of coffee bean roasting, and through the closed space, the roasting data is stable and accurate, and the roasting effect is better. Well, now the general household coffee bean roasters are small and open, and are easily affected by external influences. This device solves this problem.

Among them, a plurality of baking pot support rods 6 are horizontally erected in the casing 1, and at least one rotating wheel 61 and one limit support wheel 62 are installed on each of the baking pot support rods 6. The rotating wheel 61 and the limit support The wheels 62 are all guide wheels, the outer ring of the limit support wheel 62 is provided with a slot, and the outer ring of the baking pot is protruded with a limit ring 93, and the limit ring 93 can be rotated and clamped in the limit. Position the support wheel 62 in the slot, so that the baking pot 9 of the device rotates more stably and smoothly; the inner cavity of the shell 1 is composed of a rotating equipment room 73 and a heating room 74, and the electric heater 71 is evenly distributed in the whole heating room horizontally 74, the electric heater 71 is arranged directly below the baking pan 9, the air outlet of the heat extension pipe 72 is close to the outside of the lowermost ventilation hole 92, and the aperture of the ventilation hole 92 is less than three millimeters, so The exhaust pipe 52 is arranged on the top of the opening side of the baking pot 9, the electric heater 71 is a carbon fiber heating pipe, and the electric heater 71 extends horizontally from the open end of the baking pot to the outlet of the heating extension pipe 72. Below the tuyere, the newly fed air can be effectively heated, and the airflow will not be directly sucked away, but circulate in the baking pot 9, and replace the original moist gas in the baking pot 9, and the driving device 4 is a motor, so A drive wheel 41 is fixed on the output end of the drive device 4, the drive wheel 41 is connected with the drive wheel 42 through a transmission belt 42, the drive wheel 42 is fixedly connected with a drive shaft 44, and the other end of the drive shaft 44 is connected by bolts It can be detachably connected to the center of the outer circle at the bottom of the baking pot 9, so that the drive device 4 of the device is not easy to get hot, and the baking pot 9 can be rotated and stir-fried effectively. Installed on the housing 1, the flip cover 11 covers the top opening of the housing 1, the length and width of the baking pan 9 are smaller than the length and width of the opening at the top of the housing 1 after the flip cover 11 is turned over, the flip cover 11 and the housing 1. The inner wall is covered with thermal insulation cotton 111. The thermal insulation cotton 111 does not block the air inlet 12 of the housing, which is convenient for cleaning and taking out the baking pan 9, as well as cleaning the inner space of the housing 1, and will not affect the thermal insulation of the housing 1. As a result, a guide nozzle 51 is also fixed on the cover plate 5. The guide nozzle 51 is a groove-like structure with an open top. The top opening of the guide nozzle 51 is close to the bottom of the discharge door 53. The cover The plate 5 is provided with a sampling port 54 which is inclined downward, and the sampling port 54 is communicated with the inner cavity of the roasting pot 9. The sampling port 54 can be detachably inserted with a sampler 55, which is convenient for taking out coffee beans after roasting is completed. , the coffee beans will not be scattered, the sampler 55 is a rod-shaped structure, one end of the sampler 55 is provided with a sampling cavity 551, the other end of the sampler 55 is a handle 552, and the middle section of the sampler 55 is fixed on the top There is a clamping piece 553, the sampler 55, the left side of the clamping piece 553 on the sampler 55 is a straight cylindrical structure, the left side of the sampler 55 and the sampling port 54 are clearance fit, The catch piece 553 covers the entire sampling port 54, and the catch piece 553 cannot pass through the sampling port 5 4. The device can check the roasting condition of the coffee beans at any time, without affecting the normal roasting of the coffee beans, and will not be hung when the coffee beans are roasted. A connecting rod 33, a second connecting rod 34 and a third connecting rod 35, the runner 31 is fixedly connected with the rotating rod 32, and the fixed end of the rotating rod 32 and the first connecting rod 33 can be rotated but cannot be moved. On the cover plate 5, the third connecting rod 35 is fixedly connected with the top cross bar of the discharge door 53, and the fixed end of the third connecting rod 35 and the discharge door 53 can be rotated but cannot be installed on the cover plate 5, the movable end of the first connecting rod 33 and the movable end of the third connecting rod 35 are respectively connected to the two ends of the second connecting rod 34 through the rotating shaft, and the second connecting rod 34 is not connected to the cover plate 5. , the runner 31, the rotating rod 32, the first link 33, the second link 34, the third link 35 and the discharge door 53 form a plane four-bar mechanism, so that the device can be more powerful by rotating the runner 31 The discharge door 53 of the runner 31 is far away from the heated baking pan 9, so it is not easy to be hot, and a sealing cover 531 is also fixed on the discharge door 53. When the discharge door 53 is closed, the sealing cover 531 stuffed in the discharge port 57 (the airtight cover 531 includes a window plate 5311 and a visible window 5312, the visible window 5312 is nested and fixed in the middle of the window plate 5311, the window plate 5311 and the discharge door 53 are fixedly connected by bolts, and the window plate 5311 and the discharge port 57 are sealed with a bevel), and the gap between the cover plate 5 and the roasting pot 9 is less than 2 mm, so as to prevent coffee beans from falling on the discharging port 57, so that the roasting pot 9 cannot be accepted. In this way, the outlet 57 is blocked by the airtight cover 531 so that each coffee bean can be effectively roasted, and the smaller the opening gap between the cover plate 5 and the roasting pot 9, the coffee beans and impurities will not fall. Out of the baking pot 9, the device is not easy to get dirty, a timer 27 is also set on the base 2, the timer 27 is electrically connected with the electric heater 71, and the suction device 8 is a fan, which is convenient for recording and controlling the baking time and For the frying time, the timer 27 has multiple time recorders and timers to avoid overtime or insufficient baking time. The suction device 8 of the device uses a fan, which is simple and easy to clean.

A specific application of the embodiment is: the housing 1 of the present invention is fixed on the base 2 through the support frame 13, the support is more stable, the heat insulation effect is good, and the electronic control device in the base 2 is prevented from being damaged by heat;

When the device is in use, an appropriate amount of green coffee beans are selected, and the air inlet of the suction device 8 is separated from the exhaust pipe 52. The lower end of the exhaust pipe 52 is fixed on the cover plate 5, and passes through the cover plate 5 and is connected to the exhaust pipe 52. The open end of the baking pot 9 is connected, and the suction device 8 and the exhaust pipe 52 are in an interference fit, and are connected together by a flexible flexible tube in a plug-and-play manner, unplug the suction device 8, and then Put an appropriate amount of coffee beans into the roasting pot 9 through the top of the exhaust pipe 52, and then connect the exhaust pipe 52 to the suction device 8 to ensure the tightness of the exhaust pipe 52 and the suction device 8. The drive device 4 is turned on by controlling the stir-fry switch 21, and the drive device 4 starts to rotate. At this time, the drive device 4 drives the drive wheel 41 to follow the rotation, and the drive wheel 41 drives the drive wheel 42 to follow the rotation through the transmission belt 43. The transmission belt 43 is a transmission synchronous belt. The rotation of the transmission wheel 42 will cause the transmission shaft 44 to rotate along with it, so that the drive device 4 drives the transmission shaft 44 to rotate along with it;

It should be noted here that, because when the device is baking, the transmission shaft 44 is directly connected with the baking pot 9, and the transmission shaft 44 is also metal to achieve the driving strength, and the transmission shaft 44 will also heat with the baking pot 9. If the transmission shaft 44 is directly connected with the drive device 4, the drive device 4 will soon be heated by heat transfer, which will cause the drive device 4 to be damaged quickly. In order to avoid this situation, the drive wheel 41, Neither the transmission wheel 42 nor the transmission belt 43 can be made of metal products. In particular, the transmission belt 43 must be made of heat-insulating materials, such as an endless belt covered with polyurethane or neoprene. The heat transfer between the driving wheel 41 and the transmission wheel 42; in addition, as shown in FIG. 4, the driving device 4 and the transmission parts are arranged in the rotating equipment room 73, and the rotating equipment room 73 and the heating room 74 are isolated, The temperature in the heating chamber 74 of the device is effectively reduced, and it is directly baked in the rotating equipment chamber 73, which effectively reduces the heating of the driving device 4 and protects the driving device 4;

In this embodiment, the baking pan 9 is erected on four baking pot support rods 6 in the heating chamber 74, and each baking pot support rod 6 is provided with a rotating wheel 61 and a limit support wheel 62, The rotating wheel 61 and the limit support wheel 62 are both guide wheels, so that the baking pot support rod 6 does not need to rotate, the outer ring of the rotating wheel 61 and the limit support wheel 62 will rotate along with the baking pot 9, and the inner ring will be fixed in the baking pan. The pot support rod 6 does not move, so that the baking pot 9 can rotate on the upper limit of the baking pot support rod 6, and each limit support wheel 62 has a groove, as shown in FIG. 3, this limit support The groove on the wheel 62 is engaged with the limit ring 93, and the limit ring 93 is installed in the groove of the limit support wheel 62 to rotate, which prevents the baking pot 9 from sliding left and right, and the baking pot 9 will rotate more stably in this way. ;

After the roasting pot 9 starts to rotate, the coffee beans placed inside start to roll in the roasting pot 9 due to the action of gravity, and the stirring blade 91 in the roasting pot 9 will destroy the rotation regularity of the coffee beans, so that the coffee beans are in the roasting pot 9. The cavity is randomly and evenly tumbling and stirring, as shown in Figure 7, so that the coffee beans can be heated evenly during roasting, and each side can be heated more fully, and the coffee beans will not be superimposed, and the water vapor of the coffee beans will not be superimposed. It is easy to dissipate, and the water vapor will not accumulate together to prevent the coffee beans from being suffocated by the water vapor;

After the coffee beans start to rotate, control the thermal switch 22 to turn on the electric heater 71, so that the electric heater 71 starts to heat the roasting pot. The electric heater 71 extends from the right side of the cover plate 5 to the heating chamber 74 and the rotating equipment chamber. The isolation between 73, that is to say, the electric heater 71 is horizontally arranged at the bottom of the baking pot 9, as shown in FIG. The bottom of the baking pot 9 is heated, so that the bottom of the baking pot 9 is the hottest, and the baking pot 9 is rotated all the time, so that the baking pot 9 can be heated evenly, and it does not need to be baked with fire. Each position of the re-roasting pot 9 is covered with electric heaters 71, and the device effectively utilizes the power of the roasting pot 9 to rotate, so that the heating of the roasting pot 9 and the roasting of coffee beans are more evenly heated; The power of the heater 71 can control the heating capacity of the electric heater 71, so that the coffee beans can be roasted with different firepower, and it is convenient to adjust the firepower during the roasting. This firepower adjustment belongs to the conventional setting of the electric heater 71;

The fresh coffee beans that start to be heated are rich in water, and when the coffee beans are heated and roasted by the electric heater 71, the water will be roasted out. The roasting pot 9 of the device is a relatively sealed environment. There is a bottom of the pot, and it is inside the shell 1. The other side is blocked by the cover plate 5, and it is in a relatively closed environment. If the water vapor is not discharged, the coffee beans will be simmered, which will seriously affect the roasting taste of the coffee beans. Therefore, it is necessary to turn on the suction device 8 through the smoke exhaust switch 23 at this time, and the suction device 8 will suck away the moist hot air in the baking pot 9 through the exhaust pipe 52, so that a negative pressure is formed in the baking pot 9, and the outside of the baking pot 9 Through the ventilation hole 92, the outside air will enter the baking pot 9 under the pulling force of the suction device 8, and the air will first enter the device from the shell air inlet 12 outside the shell 1, and then The air sucked in by the air inlet 12 of the housing will be bundled together and enter the air intake bundle tube 7 to prevent the wind from running around. The bundler tube 7 is connected, and then the external cold air flows in the intake bundler tube 7, and then passes through the heating extension tube 72. The heating extension tube 72 is a metal tube, and the diameter of the tube is small, and the air flows in it. And the heating extension pipe 72 is meandering, so that when the air flows through the heating extension pipe 72, it will also be heated by the electric heater 71 near the heating extension pipe 72, so the newly incoming air will not be cold air, but Although the hot air is far from the temperature inside the roasting pot 9, it is no longer cold air. It will not make the coffee beans in the roasting pot 9 suddenly cold, and the water vapor will not be condensed into water again by the cold air. , this is more conducive to take away the water vapor in the roasting pot 9 and the silver skin that is removed when the coffee beans are roasted, and the air will enter the roasting pot 9 from the ventilation hole 92 at the bottom of the roasting pot 9, and the heat extension pipe 72 is opposite. The bottom side of the quasi-roasting pot 9 is the bottom of the pot, so that new dry air, so that when the coffee is roasted, no matter how the roasting pot 9 rotates, the outside air is always from the bottom of the roasting pot 9. The ventilation hole 92 on the bottom of the pot Enter into the roasting pot 9, and then the fresh and dry hot air will enter the negative pressure roasting pot 9 to achieve the purpose of ventilation in the roasting pot 9, and the ventilation will take away the silver skin that has been removed when the coffee beans are roasted. The silver skin is finely broken, very light and easy to be taken away, and will not cause air duct blockage; the air intake setting of this device can isolate the baking pot 9 from the outside air, and the incoming fresh air is also hot, so that the When the coffee beans are roasted, they will not suddenly be cold, which ensures the stability of the temperature of the coffee beans during roasting. This is something that ordinary small coffee roasters cannot do, and ordinary household coffee bean roasters are not thermally isolated. Instead, it communicates with the outside world, so that the temperature of coffee beans cannot be guaranteed at all during roasting, and the roasting effect cannot be controlled. This device solves this problem, the temperature control is more accurate, and no cold air enters during roasting, the effect is better, and according to Monitoring of the temperature and humidity sensor 56, the temperature and humidity in the baking pot 9 can be known at all times through the sensor display 26, so as to control Fire power and wind power, and the timer 27 can always record the time when the coffee beans start roasting and the roasting duration. If the humidity is too high, the suction power of the suction device 8 can be increased through the wind regulator 25, and the roasting pot can be taken away faster. If the temperature is too high, the calorific value of the electric heater 71 can be appropriately reduced while increasing the wind power of the suction device 8, so that the temperature and humidity in the roasting pot 9 can be controlled to keep stable, and it can also be adjusted according to different coffees. Bean roasting needs to adjust the humidity and temperature of roasting, so that coffee beans with suitable taste can be roasted, and according to personal preferences, coffee beans with different tastes can be roasted by adjusting the roasting temperature, humidity and time;

The flip cover 11 of the device is connected to the outer shell 1 through a hinge, and can be opened. After opening, there is an opening that communicates with the inner cavity of the outer shell. Take out the cover 11, clean the roasting pot 9, and store it after cleaning when not in use. It is suitable for household design. This is a setting that is not required or available for large coffee bean roasters, and the cover 11 can also be used to clean the inside of the casing 1. clutter up.

Both the outer shell 1 and the inner wall of the flip cover 11 of the device are filled with thermal insulation cotton 111, as shown in FIG. 4, so that the thermal insulation effect of the device is better, and it is not easily affected by external factors such as wind force and temperature. The roasting method of coffee beans with semi-direct fire and semi-hot air, the roasting method of this device avoids the sudden drop in temperature of the roasting pot 9 during roasting, so that the stability and accuracy of roasting temperature can be better controlled, and it is easier to record The experimental baking temperature, humidity and time can also better control external factors and achieve the purpose of stable baking.

It is necessary to explain some rotation states of the dynamic mechanism of the device. Regarding the door closing mechanism 3, the door closing mechanism 3 includes a runner 31, a rotating rod 32, a first link 33, a second link 34 and a third link 35. The runner 31 is fixedly connected with the rotating rod 32. The fixed end of the rotating rod 32 and the first connecting rod 33 can be rotated but cannot be moved and is installed on the cover plate 5. The third connecting rod 35 is connected to the outlet. The top cross bar of the feeding door 53 is fixedly connected, the fixed end of the third connecting rod 35 and the discharging door 53 can be rotated but cannot be moved on the cover plate 5, and the movable end of the first connecting rod 33 is connected to the first connecting rod 33. The movable ends of the three connecting rods 35 are respectively connected to the two ends of the second connecting rod 34 through the rotating shaft. The second connecting rod 34 is not connected with the cover plate 5 , the second connecting rod 34 is not connected with 31. The rotating rod 32, the first connecting rod 33, the second connecting rod 34, the third connecting rod 35 and the discharging door 53 form a plane four-bar mechanism. This mechanism belongs to a commonly used mechanical structure. 31, the opening or closing of the discharge door 53 can be controlled, which is more convenient to use. When the material is discharged, the discharge door 53 is opened, and the roasted coffee beans will be rotated and brought out from the discharge port 57 under the rotation of the roasting pot 9. , and then fall down through the guide nozzle 51. Because of the limitation of the guide nozzle 51, the coffee beans will not run around and scatter, and will follow the direction of the guide nozzle 51 and fall to the designated position, which is convenient for storage; the sealing on the discharge door 53 The cover 531 can closely match the discharge port 57, and the airtight cover 531 in the closed state of the discharge door 53 completely fills the discharge port 57 to prevent coffee beans from falling on the discharge port 57 when the roasting pot 9 is rotated and roasted. It is very small, but such a closed cover 531 eliminates the possibility that the coffee beans cannot fall into the filled outlet 57, which can ensure that every coffee bean in the roasting pot 9 is effectively For roasting, avoid a few unbaked coffee beans, which will spoil the taste of a whole pot of coffee beans after being ground into powder;

The cover plate 5 of the device is also provided with a sampling port 54, and the sampler 55 is inserted into the sampling port 54 at all times. As shown in FIG. 1, the handle 552 is exposed outside the cover plate 5 and will not be heated to avoid When sampling is hot, the sampler 55 can be made of heat-insulating and anti-scalding material, and the clip 553 will be stuck on the outside of the sampling port 54, because the area of the sampling port 54 is smaller than the area of the clip 553, so the sampler 55 will not Drop into the baking pot 9, a sealing ring is provided on the side of the clamping piece 553 close to the sampling cavity 551, and this sealing ring can completely seal the sampling port 54 to prevent the baking pot 9 from leaking air, and the sampling cavity of the sampler 55 551 is a hollowed-out semi-cylindrical body. As shown in FIG. 8, the sampler 55 is inserted obliquely into the sampling port 54. Such a sampling cavity 551 is not easy to drop the coffee beans when sampling, in order to avoid the roasting pot. 9. When rotating, the coffee beans fall into the sampling cavity 551 and will not be stir-fried. When sampling is not performed, the opening of the sampling cavity 551 needs to be inserted into the sampling port 54 downward;

In the present invention, by changing the structure of the roasting pot 9, the original large coffee bean roasting machine allows miniaturized assembly from the structure. For uniformity, it is necessary to pass a rotating shaft on the axis of the baking pot 9 to support and drive the balanced rotation of the large baking pot. The baking pot 9 is directly erected on the rotating shaft and locked on the rotating shaft. And in order to stir evenly, it is necessary to add a variety of stirring blades to the rotating shaft, and because the device uses a small baking pot 9, the drive shaft cannot be installed inside at all, and such installation and design methods are completely inapplicable For a small coffee bean roaster, such a roaster cannot roast a small amount of coffee beans. The device can open the casing 1 by flipping the cover 11 to clean the roasting pot 9, and the roasting pot 9 can be disassembled for cleaning. The device also achieves that a small roaster can also roast coffee beans under airtight conditions, and the process of roasting coffee beans by this device avoids the contact between coffee beans and external air, and can effectively maintain the temperature of coffee beans during roasting. Affected by the external air, the stability of the roasting temperature can be maintained, which can effectively prevent the roasting process from being too cold for a while and too hot for a while. At the same time, the cold air is preheated in the heating extension pipe 72 to prevent the cold air from directly rushing into the baking pot 9, effectively preventing the temperature drop of the baking pot 9, and better controlling the processing temperature and humidity in the baking pot 9. At the same time, it also meets the requirements of the coffee bean roasting method of semi-direct fire and semi-hot air, keeping the roasting pot 9 in a relatively isolated environment, and is no longer greatly affected by the external temperature and humidity, and only such a closed processing method can be used for roasting. The temperature of the roasting pot 9 can reach a high temperature of 300°C evenly when the pot 9 is kept warm. Only in this way can the temperature of the beans in the roasting pot 9 reach a high temperature of 130°C-150°C. This is a small household coffee bean roasting machine, which can only be localized and high temperature, which can easily lead to uneven heating. Even if the open roasting pot 9 rolls evenly, the bean temperature cannot evenly reach a high temperature of 100°C. The rotation method of 9 is the same as the rolling method of a large coffee bean roaster, which makes it easier to roast the coffee beans evenly. Effects and baking process.

In addition, it should be noted that:

The suction device 8 is a fan, which is controlled to be turned on or off by the smoke exhaust switch 23, and the wind power is adjusted by controlling the power of the fan through the wind regulator 25;

The driving device 4 is a motor, which is controlled to be turned on or off by the stir-fry switch 21;

The electric heater 71 is a carbon fiber heating tube, which is controlled to be turned on or off by the fire switch 22, and the heating power is controlled by the fire regulator 24;

These are all common electrical appliances, and they are all existing devices with many models, and they are not the research and development direction of the device, so they will not be repeated here.

The coffee beans used in making coffee are actually the seeds inside the coffee fruit. The outer layer of the seeds has structures such as exocarp, pulp, pectin, endocarp and silver skin, and the purpose of processing is to remove these external structures. , to get the coffee seeds inside, and Silver Skin/Chaff: Inside the parchment, there is a thinner film that wraps the coffee beans. Because of the glossy and silvery color, people are used to calling it "silver skin". Skin". This layer of silver skin will fall off during roasting. Usually, there are some silver shavings in the coffee powder when grinding coffee. These shavings are the silver skin that cannot be peeled off from the coffee beans during roasting, and the silver skin will bring astringency. , If the amount of silver skin is not large, it will not have much effect, if it is too much, the taste of coffee will be more sour, and the taste of such coffee beans will not be good;

The suction device 8 of the device is a general fan with blades, not a turbo fan. Such a large-opening fan with blades is easy to remove the silver skin that is removed from the coffee beans during roasting, and the blades are large, and the silver skin is not easy to be Hanging on the blade, the turbine fan is easy to hang on the silver skin, which is difficult to clean.

The base 2 is provided with a stir-fry switch 21, a fire switch 22, a fan switch 23, a fire regulator 24, a wind regulator 25, a sensor display 26, a timer 27, and the fire regulator 24 and the wind regulator 25 belong to conventional electrical appliances. With the above settings, the thermal power regulator 24 can control the power of the electric heater 71 , and the wind regulator 25 can control the wind power of the fan of the suction device 8 .

Although the specific embodiments of the present invention are described above, those skilled in the art should understand that the specific embodiments described in the present invention are only illustrative, rather than used to limit the scope of the present invention. Equivalent modifications and changes made by those skilled in the art in accordance with the spirit of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims (10)

1. A small enclosed coffee bean roasting machine is characterized in that: it comprises: A casing (1) and a base (2), the casing (1) is a sealed box, a flip cover (11) can be opened and locked on the casing (1), and the casing (1) is stably and fixedly arranged On the base (2), a stir-fry switch (21), a fire switch (22), a smoke exhaust switch (23) and a sensor display (26) are arranged on the base (2); A cover plate (5), the cover plate (5) is sealed and fixed on one side of the casing (1), and a plurality of casing air inlets ( 12), a discharge port (57) is set on the cover plate (5), and a discharge door (53) can be opened and closed on the discharge port (57). An exhaust pipe (52) is provided, and a temperature and humidity sensor (56) is also installed on the cover plate (5); a door closing mechanism (3), the door closing mechanism (3) controls the opening or closing of the discharge door (53) outside the casing (1); A baking pot (9), the baking pot (9) is a barrel-shaped structure with one side open, and a plurality of ventilation holes (92) are evenly opened on one side of the closed bottom of the baking pot (9), so The baking pot (9) is rotatably mounted on the inner cavity of the outer shell (1), the opening side of the baking pot (9) and the axis of the bottom of the pot are on the same straight line and are arranged horizontally, and the cover plate (5) is close to and Covering the open side of the baking pot (9), the cover plate (5) and the baking pot (9) are in clearance fit; a driving device (4), the driving device (4) is a power source for the rotation of the baking pan (9); an intake constricting pipe (7), the intake constricting pipe (7) is arranged in the casing (1), and a plurality of casing air inlets (12) are connected to the intake air of the intake constricting pipe (7) The air outlet of the air intake and condensing pipe (7) is connected to the heating extension pipe (72), and an electric heater (71) is also arranged in the outer casing (1), and the electric heater (71) is close to the The baking pot (9) is provided, the heating extension pipe (72) is also arranged close to the electric heater (71), and the air outlet of the heating extension pipe (72) is connected to the ventilation hole (92) at the bottom of the baking pot (9). ) in the same cavity; A suction device (8), the suction port of the suction device (8) and the outlet of the exhaust pipe (52) can be separated and communicated, and the inlet of the exhaust pipe (52) is connected to the inside of the baking pot (9). cavity communication; The suction device (8) is electrically connected to an external power source through a smoke exhaust switch (23), the drive device (4) is electrically connected to an external power source through a stir-fry switch (21), and the electric heater (71) is electrically connected to the external power source through a stir-fry switch (21). The fire switch (22) is electrically connected to the external power supply, the sensor display (26) is data-connected to the temperature and humidity sensor (56), and the sensor display (26) is electrically connected to the external power supply. 2. A small enclosed coffee bean roasting machine according to claim 1, characterized in that: a plurality of roasting pot support rods (6) are horizontally erected in the casing (1), and each roasting pot At least one rotating wheel (61) and one limiting support wheel (62) are installed on the support rod (6), the rotating wheel (61) and the limiting support wheel (62) are both guide wheels, and the limiting support A snap groove is formed on the outer ring of the wheel (62), a limit ring (93) is protruded on the outer ring of the baking pan, and the limit ring (93) is rotatably clamped on the limit support wheel (62) in the card slot. 3. A small enclosed coffee bean roasting machine according to claim 1, characterized in that: the inner cavity of the shell (1) is composed of a rotating equipment chamber (73) and a heating chamber (74), and the electrical The heater (71) is evenly distributed in the entire heating chamber (74) horizontally, the electric heater (71) is arranged directly below the baking pot (9), and the air outlet of the heat extension pipe (72) is close to the most Outside the ventilation hole (92) below, the diameter of the ventilation hole (92) is less than three millimeters, the exhaust pipe (52) is arranged on the top of the opening side of the baking pan (9), and the electric heater (71) is a carbon fiber heating tube, and the electric heater (71) extends horizontally from the open end of the baking pan to below the air outlet of the heating extension tube (72). 4. A small enclosed coffee bean roasting machine according to claim 2, characterized in that: the drive device (4) is a motor, and a drive wheel ( 41), the drive wheel (41) is connected with the drive wheel (42) through the drive belt (42), the drive wheel (42) is fixedly connected with the drive shaft (44), and the other end of the drive shaft (44) passes through the The bolts are detachably connected at the center of the outside of the bottom of the baking pan (9). 5. A small closed coffee bean roaster according to claim 1, characterized in that: the casing (1) has an opening at the top, and the flip cover (11) is mounted on the casing (1) through a hinge, The flip cover (11) covers the top opening of the casing (1), the length and width of the baking pan (9) are smaller than the length and width of the opening at the top of the casing (1) after the flip cover (11) is opened, and the The flip cover (11) and the inner wall of the casing (1) are covered with thermal insulation cotton (111), and the thermal insulation cotton (111) does not block the air inlet (12) of the casing. 6. A small closed coffee bean roasting machine according to claim 1, characterized in that: a guide nozzle (51) is also fixed on the cover plate (5), and the guide nozzle (51) It is a groove-like structure with an open top, the top opening of the guide nozzle (51) is close to the bottom of the discharge door (53), and the cover plate (5) is provided with a sampling port (54) sloping downward. , the sampling port (54) communicates with the inner cavity of the baking pot (9), and a sampler (55) is detachably inserted in the sampling port (54). 7. A small enclosed coffee bean roasting machine according to claim 6, characterized in that: the sampler (55) is a rod-shaped structure, and one end of the sampler (55) is provided with a sampling cavity ( 551), the other end of the sampler (55) is a handle (552), and a clamping piece (553) is fixed on the middle section of the sampler (55). The left side of the latch (553) on the sampler (55) is a straight cylindrical structure, the left side of the sampler (55) and the sampling port (54) are in clearance fit, and the latch (553) ) covers the entire sampling port (54), and the clip (553) cannot pass through the sampling port (54). 8 . The small enclosed coffee bean roasting machine according to claim 1 , wherein the door closing mechanism ( 3 ) comprises a runner ( 31 ), a rotating rod ( 32 ), a first connecting rod ( 8 . 33), the second connecting rod (34) and the third connecting rod (35), the runner (31) is fixedly connected with the rotating rod (32), and the rotating rod (32) is connected with the first connecting rod (33) The fixed end is rotatable but immovable and is installed on the cover plate (5). The third link (35) is fixedly connected to the top cross bar of the discharge door (53). The fixed end of the discharge door (53) is rotatably mounted on the cover plate (5) but cannot move, and both the movable end of the first link (33) and the movable end of the third link (35) pass through The rotating shafts are respectively connected at both ends of the second connecting rod (34), the second connecting rod (34) is not connected with the cover plate (5), the rotating wheel (31), the rotating rod (32), the first connecting rod (34) The rod (33), the second connecting rod (34), the third connecting rod (35) and the discharging door (53) form a plane four-bar mechanism. 9. A small closed coffee bean roasting machine according to claim 1, characterized in that: an airtight cover (531) is also fixed on the discharge door (53), when the discharge door (53) ) is closed, the airtight cover (531) is stuffed in the discharge port (57), and the gap between the cover plate (5) and the baking pan (9) is less than two millimeters. 10. A small enclosed coffee bean roasting machine according to claim 1, characterized in that: a timer (27) is further set on the base (2), and the timer (27) is connected with the electric heating The device (71) is electrically connected, and the suction device (8) is a fan.

Images