Energy-saving coffee roaster

Abstract

The application discloses an energy-saving coffee roasting machine, which comprises a roasting module, a heat exchange module, a heating module and a blowing module. The roasting module comprises a roasting bin for containing coffee beans. The heat exchange module comprises a heat exchange bin and a heat exchange pipe arranged in the heat exchange bin. The heating module comprises a heating bin and a heater arranged in the heating bin. The blowing module comprises a blowing bin, an impeller and a motor. The impeller is rotatably arranged in the blowing bin, and the motor drives the impeller to rotate. Compared with the prior art, the energy-saving coffee roasting machine does not directly discharge the tail gas with residual heat discharged from the roasting bin into the atmosphere, but preheats the newly-arrived air in the heat exchange bin, so that the heat energy is more fully utilized, thereby reducing the energy consumption of the heating module.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coffee roasting, in particular to an energy-saving coffee roaster. BACKGROUND

[0002] Coffee roasting is a process of making coffee green beans into coffee roasted beans by a certain roasting method, which has a significant impact on the taste of coffee. In order to achieve high-quality roasting, the roasting temperature, air inlet quantity and other variables of the equipment need to be accurately controlled.

[0003] The existing small coffee roaster (such as the British ikawa roaster) adopts a method of directly discharging the roasting tail gas with high temperature, which has the problem of wasting heat energy. SUMMARY

[0004] The purpose of the present application is to provide an energy-saving coffee roaster which recovers part of the heat energy in the tail gas.

[0005] In order to achieve the above purpose, the present application provides the following solutions:

[0006] The present application discloses an energy-saving coffee roaster, comprising:

[0007] A roasting module, the roasting module comprises a roasting bin for accommodating coffee beans, the roasting bin has a first air inlet and a first air outlet;

[0008] A heat exchange module, the heat exchange module comprises a heat exchange bin and a heat exchange pipe arranged in the heat exchange bin; the heat exchange bin has a second air inlet, a second air outlet and a tail gas outlet, the second air inlet is connected to the first air outlet; the inlet of the heat exchange pipe is used for passing in external air;

[0009] A heating module, the heating module comprises a heating bin and a heater arranged in the heating bin; the heating bin has a third air inlet and a third air outlet; the second air outlet is connected to the third air inlet, and the outlet of the heat exchange pipe is connected to the third air inlet;

[0010] A blowing module, the blowing module comprises a blowing bin, an impeller and a motor; the impeller is rotatably installed in the blowing bin, and the motor drives the impeller to rotate; the blowing bin has a fourth air inlet and a fourth air outlet, the fourth air inlet is connected to the third air outlet, and the fourth air outlet is connected to the first air inlet.

[0011] Preferably, the energy-saving coffee roaster further comprises a feeding module, the feeding module comprises a guide member and a valve; the guide member is connected to the roasting bin and is used for conveying coffee beans to the roasting bin; the valve is installed on the guide member and is used for blocking the guide channel of the guide member.

[0012] Preferably, the roasting bin is a pear-shaped structure with the tip pointing upwards, the first air inlet is located at the bottom of the roasting bin, and the first air outlet is located at the top of the roasting bin.

[0013] Preferably, a serpentine channel is arranged in the heat exchange bin, and the heat exchange pipe is arranged in the serpentine channel.

[0014] Preferably, the heater is a finned electric heating pipe.

[0015] Preferably, the roasting module is arranged above the air blowing module, and the heat exchange module is arranged above the heating module.

[0016] Preferably, the motor is arranged outside the air blowing bin and on the side of the air blowing bin away from the heating bin.

[0017] Preferably, the air blowing module further comprises a vertical shaft, the impeller is fixed on the vertical shaft, the lower end of the vertical shaft extends out of the air blowing bin, and the part of the vertical shaft extending out of the air blowing bin is connected with the motor transmission.

[0018] Preferably, the energy-saving coffee roaster further comprises a bin, the bin comprises a side wall and a lower side sieve, the side wall forms an annular structure with openings at the top and bottom, and the lower side sieve is arranged at the bottom of the side wall; the roasting bin comprises a bin body and an upper side sieve, the first air inlet is located at the lower end of the bin body, the first air outlet is located at the upper end of the bin body, and the upper side sieve is detachably arranged at the first air inlet; the upper side sieve and the lower side sieve are used for ventilation and blocking of coffee beans; the bin is arranged between the roasting bin and the air blowing bin, the fourth air outlet is connected with the bottom opening of the side wall, and the first air inlet is connected with the top opening of the side wall.

[0019] Preferably, the energy-saving coffee roaster further comprises a housing, the roasting bin is fixed in the housing, a heat preservation layer is arranged between the roasting bin and the housing, upper and lower sliding grooves are arranged on the housing, the upper side sieve is slidably connected with the upper sliding groove, and the bin is slidably connected with the lower sliding groove.

[0020] The present application has the following technical effects compared with the prior art:

[0021] In the present application, the tail gas with residual heat discharged from the roasting bin is not directly discharged into the atmosphere, but is used to preheat the newly entering air in the heat exchange bin, so that the heat energy is more fully utilized, thereby reducing the energy consumption of the heating module.

[0022] In the preferred scheme of the present application, the roasting bin is in pear shape with the tip pointing upwards. Compared with the cylindrical roasting bin, the temperature distribution in the pear-shaped roasting bin is more uniform, which is beneficial to improve the consistency of the coffee bean roasting effect.

[0023] In the preferred scheme of the present application, the motor is arranged outside the air blowing bin and located at the side of the air blowing bin away from the heating bin, which can reduce the influence of the high-temperature air in the heating bin and the air blowing bin on the performance of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on these drawings.

[0025] Figure 1 FIG. 1 is a structural schematic diagram of an energy-saving coffee roasting machine according to an embodiment of the present application;

[0026] Figure 2 FIG. 2 is a tail gas flow path schematic diagram of the energy-saving coffee roasting machine according to the embodiment of the present application;

[0027] Figure 3 FIG. 3 is a schematic diagram of a heating module;

[0028] Figure 4 FIG. 4 is a schematic diagram of a heat exchange module;

[0029] Figure 5 FIG. 5 is a schematic diagram of a roasting module and a discharging module;

[0030] Figure 6 FIG. 6 is a schematic diagram of an air blowing module;

[0031] Figure 7 FIG. 7 is a schematic diagram of the positional relationship of a bin, an upper side sieve and a shell;

[0032] Figure 8 FIG. 8 is a schematic diagram of the upper side sieve;

[0033] Figure 9 FIG. 9 is a schematic diagram of the bin.

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] 100-roasting module; 200-bin; 300-air blowing module; 400-heating module; 500-heat exchange module; 600-discharging module;

[0036] 101 - baking bin; 102 - heat preservation layer; 103 - baking shell; 104 - first air inlet; 201 - lower side sieve; 202 - side wall; 203 - upper side sieve; 204 - bin shell; 301 - motor; 302 - motor bin; 303 - vertical shaft; 304 - impeller; 305 - air blowing bin; 401 - first finned electric heating tube; 402 - second finned electric heating tube; 403 - bracket; 404 - heating bin; 501 - heat exchange bin; 502 - vertical plate; 503 - horizontal plate; 504 - first heat exchange tube; 505 - second heat exchange tube; 506 - third heat exchange tube; 507 - heat preservation inner layer; 508 - leading-out pipe; 601 - valve; 602 - material guiding member. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] Reference Figures 1-9 The present embodiment provides an energy-saving coffee roaster, which comprises a baking module 100, a heat exchange module 500, a heating module 400 and an air blowing module 300.

[0039] The baking module 100 comprises a baking bin 101 for containing coffee beans, the baking bin 101 having a first air inlet 104 and a first air outlet. The heat exchange module 500 comprises a heat exchange bin 501 and heat exchange tubes arranged in the heat exchange bin 501. The heat exchange bin 501 has a second air inlet, a second air outlet and a tail gas outlet, and the second air inlet is connected to the first air outlet. The inlets of the heat exchange tubes are used for leading in external air. The heating module 400 comprises a heating bin 404 and a heater arranged in the heating bin 404. The heating bin 404 has a third air inlet and a third air outlet, and the second air outlet is connected to the third air inlet, and the outlets of the heat exchange tubes are connected to the third air inlet. The air blowing module 300 comprises an air blowing bin 305, an impeller 304 and a motor 301. The impeller 304 is rotatably installed in the air blowing bin 305, and the motor 301 drives the impeller 304 to rotate. The air blowing bin 305 has a fourth air inlet and a fourth air outlet, and the fourth air inlet is connected to the third air outlet, and the fourth air outlet is connected to the first air inlet 104.

[0040] The working principle of the energy-saving coffee roaster of the present embodiment is as follows:

[0041] Hot air enters the roasting chamber 101 through the first air inlet 104, heating the coffee beans. The residual heat from the exhaust gas leaves the roasting chamber 101 through the first air outlet and enters the heat exchange chamber 501. As the exhaust gas flows within the heat exchange chamber 501, it heats the air inside the heat exchange tubes, preheating it. The exhaust gas is then discharged from the heat exchange chamber 501 through the exhaust outlet. After preheating, the air in the heat exchange tubes enters the heating chamber 404, where it is further heated by the heater before entering the blower chamber 305. The impeller 304 in the blower chamber 305 continuously supplies air into the roasting chamber 101, where it roasts the coffee beans.

[0042] In this embodiment, the exhaust gas with residual heat discharged from the baking chamber 101 is not directly discharged into the atmosphere, but is preheated in the heat exchange chamber 501 to make fuller use of thermal energy, thereby reducing the energy consumption of the heating module 400.

[0043] As a possible example, in this embodiment, the energy-saving coffee roaster further includes a feeding module 600, which includes a guide component 602 and a valve 601. The guide component 602 is connected to the roasting chamber 101 and is used to transport coffee beans to the roasting chamber 101. The valve 601 is installed on the guide component 602 and is used to block the feeding channel of the guide component 602. The guide component 602 can be a funnel, which includes a conical section and a vertical pipe section, with the upper end of the vertical pipe section connected to the lower end of the conical section. In this embodiment, the lower end of the vertical pipe section is connected to a first air outlet, and the side wall 202 of the vertical pipe section is connected to a second air inlet through a branch pipe, realizing an indirect connection between the first air outlet and the second air inlet. The valve 601 is located above the branch pipe. When the valve 601 is closed, the exhaust gas with residual heat directly enters the heat exchange chamber 501 through the branch pipe.

[0044] It is understood that those skilled in the art may also choose to provide a feed inlet that can be opened and closed on the roasting chamber 101 to put coffee beans into and take out the roasting chamber 101.

[0045] As a possible example, in this embodiment, the roasting chamber 101 has a pear-shaped structure with the tip pointing upwards. The first air inlet 104 is located at the bottom of the roasting chamber 101, and the first air outlet is located at the top of the roasting chamber 101. With a consistent maximum cross-sectional area, compared to a cylindrical roasting chamber 101, the pear-shaped roasting chamber 101 has a more uniform temperature distribution, which is beneficial for improving the consistency of coffee bean roasting results.

[0046] As a possible example, in this embodiment, a serpentine channel is arranged inside the heat exchange chamber 501, and heat exchange tubes are coiled within the serpentine channel. The serpentine channel extends the flow path of the exhaust gas within the heat exchange chamber 501, and the coiled heat exchange tubes extend the flow path of the air inside the heat exchange chamber 501. By extending the flow path of the exhaust gas and fresh air within the heat exchange chamber 501, the heat exchange time between the two is extended, thereby further improving the utilization rate of the exhaust gas waste heat.

[0047] Specifically, in this embodiment, the heat exchange tubes include a first heat exchange tube 504, a second heat exchange tube 505, and a third heat exchange tube 506 connected sequentially along a serpentine channel. The third heat exchange tube 506 is connected to one end of an outlet pipe 508, and the other end of the outlet pipe 508 is connected to a third air inlet to introduce preheated air into the heating chamber 404. The heat exchange chamber 501 is rectangular in shape and includes a vertical plate 502 and a horizontal plate 503. An inner insulation layer 507 is arranged inside the heat exchange chamber 501 to improve the insulation effect.

[0048] As a possible example, in this embodiment, the heater is a finned electric heating tube, which is fixed on a bracket 403 inside the heating chamber 404, specifically including a first finned electric heating tube 401 and a second finned electric heating tube 402. Depending on the actual needs, those skilled in the art may also choose other types of heaters, as long as they can heat air.

[0049] As one possible example, in this embodiment, the baking module 100 is arranged above the blower module 300, and the heat exchange module 500 is arranged above the heating module 400. Those skilled in the art can also choose other arrangements, as long as the exhaust gas can be reused within the heat exchange chamber 501.

[0050] As a possible example, in this embodiment, the motor 301 is located outside the blower chamber 305 and on the side of the blower chamber 305 away from the heating chamber 404, so as to reduce the impact of the high temperature air in the heating chamber 404 and the blower chamber 305 on the performance of the motor 301.

[0051] As a possible example, in this embodiment, the blower module 300 further includes a vertical shaft 303, an impeller 304 fixed to the vertical shaft 303, and the lower end of the vertical shaft 303 extending out of the blower chamber 305. The portion of the vertical shaft 303 extending out of the blower chamber 305 is connected to the motor 301 for transmission. Specifically, in this embodiment, the motor 301 is horizontally mounted, with a motor housing 302 covering its outer side. A first bevel gear is mounted on the output shaft of the motor 301, and a second bevel gear is mounted on the vertical shaft 303, with the first bevel gear meshing with the second bevel gear. A first bearing housing is installed inside the motor housing 302, and a second bearing housing is installed inside the blower chamber 305. The vertical shaft 303 connects both the first and second bearing housings, and the impeller 304 is fixed to the upper end of the vertical shaft 303.

[0052] As a possible example, in this embodiment, the energy-saving coffee roaster further includes a hopper 200, which includes a side wall 202 and a lower filter screen 201. The side wall 202 forms an annular structure with openings at both its top and bottom, and the lower filter screen 201 is installed at the bottom of the side wall 202. The roasting chamber 101 includes a chamber body and an upper filter screen 203. A first air inlet 104 is located at the lower end of the chamber body, and a first air outlet is located at the upper end of the chamber body. The upper filter screen 203 can be detachably covered at the first air inlet 104. The upper filter screen 203 and the lower filter screen 201 are used for ventilation and to block coffee beans. The hopper 200 is disposed between the roasting chamber 101 and the blower chamber 305. A fourth air outlet is connected to the bottom opening of the side wall 202, and the first air inlet 104 is connected to the top opening of the side wall 202. After the coffee beans are roasted, the upper sieve 203 can be removed, and the coffee beans fall into the hopper 200 formed by the lower sieve 201 and the side wall 202, thus completing the collection of the coffee beans.

[0053] As a possible example, in this embodiment, the energy-saving coffee roaster also includes a casing. The roasting chamber 101 is fixed inside the casing, and an insulation layer 102 is provided between the roasting chamber 101 and the casing to prevent heat loss from the roasting chamber 101. An upper sliding groove and a lower sliding groove are provided on the casing. The upper material sieve 203 is slidably connected to the upper sliding groove, and the material hopper 200 is slidably connected to the lower sliding groove. After the coffee beans are roasted, the upper material sieve 203 can be slidably pulled out along the upper sliding groove. After the material hopper 200 has finished collecting the coffee beans, it can be slidably pulled out along the lower sliding groove.

[0054] As a possible example, in this embodiment, the upper sieve 203 is provided with a plurality of fan-shaped air guide vanes, with sieve holes formed between adjacent air guide vanes. Therefore, the upper sieve 203 can guide the airflow entering the baking chamber 101 into a spiral shape.

[0055] As a possible example, in this embodiment, the outer shell is composed of multiple parts. Among them, the outer shell 103 covers the outside of the baking chamber 101, and the outer shell 204 covers the outside of the hopper 200. The upper sliding groove and the lower sliding groove are both provided on the hopper shell 204.

[0056] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. An energy-saving coffee roaster, characterized in that, include: A roasting module, the roasting module including a roasting chamber for containing coffee beans, the roasting chamber having a first air inlet and a first air outlet; A heat exchange module includes a heat exchange chamber and heat exchange tubes disposed within the heat exchange chamber; the heat exchange chamber has a second air inlet, a second air outlet, and an exhaust gas outlet, the second air inlet being connected to the first air outlet; the inlet of the heat exchange tubes is used to introduce outside air; A heating module, comprising a heating chamber and a heater disposed within the heating chamber; The heating chamber has a third air inlet and a third air outlet; the second air outlet is connected to the third air inlet, and the outlet of the heat exchange tube is connected to the third air inlet; A blower module includes a blower chamber, an impeller, and a motor; the impeller is rotatably installed inside the blower chamber, and the motor drives the impeller to rotate; the blower chamber has a fourth air inlet and a fourth air outlet, the fourth air inlet is connected to the third air outlet, and the fourth air outlet is connected to the first air inlet; The roasting chamber has a pear-shaped structure with the pointed end facing upwards; the roasting module is arranged above the blower module, and the heat exchange module is arranged above the heating module; the energy-saving coffee roaster also includes a feed hopper, which includes a side wall and a lower feed sieve; the side wall forms a ring structure with openings at both the top and bottom, and the lower feed sieve is installed at the bottom of the side wall; the roasting chamber includes a chamber body and an upper feed sieve, the first air inlet is located at the lower end of the chamber body, the first air outlet is located at the upper end of the chamber body, and the upper feed sieve can be detachably covered at the first air inlet; both the upper and lower feed sieves are used for ventilation and to block coffee beans; the feed hopper is located between the roasting chamber and the blower chamber, the fourth air outlet is connected to the bottom opening of the side wall, and the first air inlet is connected to the top opening of the side wall.

2. The energy-saving coffee roaster according to claim 1, characterized in that, It also includes a feeding module, which includes a guide and a valve; the guide is connected to the roasting chamber and is used to transport coffee beans to the roasting chamber; the valve is installed on the guide and is used to block the feeding channel of the guide.

3. The energy-saving coffee roaster according to claim 1, characterized in that, The heat exchange chamber is arranged in a serpentine channel, and the heat exchange tubes are coiled and arranged within the serpentine channel.

4. The energy-saving coffee roaster according to claim 1, characterized in that, The heater is a finned electric heating tube.

5. The energy-saving coffee roaster according to claim 1, characterized in that, The motor is located outside the blower chamber and on the side of the blower chamber away from the heating chamber.

6. The energy-saving coffee roaster according to claim 5, characterized in that, The blower module also includes a vertical shaft, the impeller is fixed on the vertical shaft, the lower end of the vertical shaft extends out of the blower chamber, and the part of the vertical shaft extending out of the blower chamber is connected to the motor drive.

7. The energy-saving coffee roaster according to claim 1, characterized in that, It also includes an outer shell; the baking chamber is fixed inside the outer shell, and an insulation layer is provided between the baking chamber and the outer shell; an upper sliding groove and a lower sliding groove are provided on the outer shell, the upper material screen is slidably connected to the upper sliding groove, and the material chamber is slidably connected to the lower sliding groove.

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