Biological fermentation reaction device

Abstract

A biological fermentation reaction device comprises a fermentation box, a motor, a bottom plate, a temperature switch, a stirring shaft, a time control circuit, a heat dissipation control circuit, a temperature rise control circuit, a control mechanism and a ventilation mechanism, the ventilation mechanism comprises a cylinder and a bearing A, the other end of the stirring shaft is mounted in an inner ring of the bearing A, a driven belt pulley is mounted on the outer side of the stirring shaft, the motor is mounted on the fixed table, and a driving belt pulley and the driven belt pulley mounted on a rotating shaft of the motor are connected through a belt; the control mechanism comprises a fan and a fixed shell, the fixed shell and the fan are installed on the fixed table, an electric heating plate is installed in the fixed shell, a fixed shell air inlet pipe is connected with a fan air outlet pipe, a communicating pipe of the barrel is connected with a fixed shell exhaust pipe, and a temperature switch is installed outside the fermentation box. According to the utility model, raw materials can be automatically and uniformly stirred and mixed, and the temperature in the fermentation box can be kept at a set value.

Description

Technical Field

[0001] The utility model relates to the technical field of biological production auxiliary equipment, in particular to a biological fermentation reaction device. Background Art

[0002] Fermentation is a biochemical reaction, which usually refers to the process in which microorganisms decompose organic matter into simple substances under anaerobic conditions. Fermentation is of great significance in biology, mainly including the following aspects: (1) Energy production: Through the anaerobic respiration process, microorganisms can generate energy and maintain life activities in an environment without external air. (2) Material transformation: converting organic matter into useful substances. (3) Bioremediation: using microorganisms to decompose pollutants. (4) Microbial cultivation: by controlling the fermentation conditions, specific microorganisms can be cultivated for the production of biological products, medicines, etc. (5): using fermentation to produce biofuels, biopesticides, biofertilizers, etc.

[0003] In the prior art, the biological fermentation reaction method used for microbial culture is generally to place the raw materials to be fermented in a fermentation box with temperature control equipment, and ferment and culture the microorganisms at a certain ambient temperature. Although the above method meets the needs of raw material fermentation control to a certain extent, it is limited by the structure and there are still some technical problems that need to be solved as follows. First: During microbial fermentation, the staff is generally required to open the lid of the fermentation box and manually stir the fermented raw materials (to dissipate heat and mix them, etc.). This operation method will bring inconvenience to the staff, and when the staff fails to stir the fermented raw materials on time for various reasons, it will more or less cause adverse effects on the normal fermentation of the raw materials (for example, the temperature of the raw materials in a certain area is too high and they are not stirred and dissipated in time, resulting in the loss of biological activity, etc.). Second, the temperature control equipment of the fermentation box generally only has a single high-temperature insulation or low-temperature insulation function (the actual low-temperature function is generally to blow flowing air into the fermentation box through the fan to take away the heat generated during fermentation, thereby reducing the fermentation temperature of the raw materials). In other words, the corresponding equipment can only perform a single relatively high-temperature or low-temperature fermentation insulation function, and the function is relatively single. The overall structure of the equipment is relatively non-compact and inconvenient to use. In summary, it is particularly necessary to provide a device that can automatically and regularly stir the raw materials in the fermentation box and ferment the raw materials at both high and low temperatures. Utility Model Content

[0004] In order to overcome the drawbacks of the existing biological fermentation reaction equipment for microbial cultivation as described in the background due to structural limitations, the utility model provides a biological fermentation reaction device that can, under the joint action of relevant mechanisms, fully stir and mix the raw materials in the fermentation box at regular intervals at regular intervals, thereby improving the fermentation effect and preventing the problem of microbial inactivity caused by excessive temperature rise as much as possible. It also has the functions of heating and heat dissipation and cooling, and the overall equipment is more compact and more convenient to use.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] A biological fermentation reaction device comprises a fermentation box, a motor, a bottom plate, a temperature switch, a stirring shaft, and a time control circuit. The fermentation box is provided with a feeding port and a sealing plate, and the lower end of the fermentation box is provided with a discharge port. The device is characterized in that it also comprises a heat dissipation control circuit, a temperature rise control circuit, a control mechanism, and a ventilation mechanism; a plurality of hollow stirring blades which are interconnected with the interior of the stirring shaft are installed on the outer side of the stirring shaft, openings are respectively provided on both side ends of the fermentation box, one end of the stirring shaft is rotatably installed in one of the openings of the fermentation box, fixed seats are respectively installed on one end and the middle part of the bottom plate, a bearing seat is installed on one of the fixed seats, the outer side of the stirring shaft is installed in the inner ring of the bearing of the bearing seat, the ventilation mechanism comprises a barrel and a bearing A, at least two bearings A are respectively installed in both sides of the barrel, the barrel is rotatably installed in another opening of the fermentation box, the other end of the stirring shaft is installed in the inner rings of the two bearings A, a driven pulley is installed on the outer side of the stirring shaft, and the lower end of the barrel is installed on another fixed seat; the side end of the other fixed seat has a fixed seat A fixed platform, a motor is installed on one end of the fixed platform, a driving pulley is installed on the rotating shaft of the motor, and the driving pulley and the driven pulley are connected via a transmission belt; the control mechanism includes a fan and a fixed shell, the fixed shell and the fan are installed on the other end of the fixed platform, an electric heating plate is installed in the fixed shell, the fixed shell has an air inlet pipe and an exhaust pipe, the air inlet pipe is connected to the air outlet pipe of the fan, a connecting pipe is installed on the cylinder, the upper end of the connecting pipe is connected to the exhaust pipe, the temperature switch is installed outside the fermentation box and its temperature sensing head is located inside the fermentation box; the timing control circuit, the heat dissipation control circuit, and the temperature rise control circuit are installed in the component box; the power output end of the timing control circuit is electrically connected to the power input end of the motor, the power output ends of the heat dissipation control circuit and the temperature rise control circuit are electrically connected to the power input ends of the fan and the electric heating plate respectively, the signal output end of the temperature switch is electrically connected to the signal input end of the heat dissipation control circuit, and the signal output end of the heat dissipation control circuit is electrically connected to the signal input end of the temperature rise control circuit.

[0007] Furthermore, the stirring shaft is located between two bearings A in the cylinder and has a plurality of air inlet holes distributed on its surface.

[0008] Furthermore, the stirring blade has a plurality of vents, a guide groove is installed at the lower end of the discharge port, and a sealing plate A is installed in the guide groove for sliding sealing.

[0009] Furthermore, a one-way air valve is installed on one side of the upper end of the fermentation box.

[0010] Furthermore, the heat dissipation control circuit includes an electrically connected adjustable resistor, a resistor, a transistor and a relay, one end of the adjustable resistor is connected to one end of the resistor and the base of the transistor, the collector of the transistor is connected to the negative power input end of the relay, and the other end of the resistor is connected to the emitter of the transistor.

[0011] Furthermore, the temperature rise control circuit includes an electrically connected adjustable resistor, a resistor, a transistor, a relay, and a diode. One end of the adjustable resistor is connected to one end of the resistor and the base of the transistor. The collector of the transistor is connected to the negative power input end of the first relay and the negative pole of the diode. The other end of the resistor is connected to the emitter of the transistor. The positive pole of the diode is connected to the negative power input end of the second relay, and the positive power input ends of the two relays are connected.

[0012] Compared with the prior art, the utility model has the following beneficial effects: (1) Under the action of the timing control circuit, the motor can fully stir and mix the raw materials in the fermentation box through the stirring shaft and stirring blades at regular intervals, thereby improving the fermentation effect and preventing the problem of microorganisms losing their activity due to excessive temperature rise as much as possible; (2) Under the joint action of the temperature switch, the temperature rise control circuit, and the heat dissipation control circuit, when the temperature in the fermentation box is lower than the set value or higher than the set value, the electric heating plate, the fan, or the fan alone can be powered on to supply hot air or room temperature air into the fermentation box. In this way, the temperature in the fermentation box can be increased or decreased, achieving the technical effect of the utility model that the equipment as a whole is more compact and more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall and partial structures of the utility model;

[0014] Figure 2 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0015] Figure 1 , 2As shown, a biological fermentation reaction device includes a fermentation box 1, a motor M, a bottom plate 2, a power module E1, a temperature switch W, a stirring shaft 3, and a time control circuit E2. A feeding port 101 is provided in the middle of the upper end of the fermentation box, and a sealing plate 102 installed by bolts is installed in the feeding port. A discharge port 103 is provided in the middle of the lower end of the fermentation box. The fermentation box also has a heat dissipation control circuit 4, a temperature increase control circuit 5, a control mechanism, and a ventilation mechanism. A plurality of hollow stirring blades 31 that are interconnected with the stirring shaft are welded at a certain distance on the upper and lower parts of the outer side of the stirring shaft 3. The left and right ends of the hollow stirring shaft 3 are closed structures. The left and right ends of the fermentation box 1 have an open structure in the middle of the left and right sides. A hole is formed in the left end of the fermentation box 1, a bearing 104 is welded in a sealing manner in the left end opening, and the outer side of the left part of the stirring shaft 3 is welded in a sealing manner in the inner ring of the bearing 104 (sealing rings are installed on the left and right sides between the inner and outer rings of the bearing 104), the left side of the stirring shaft 3 is located outside the left end of the fermentation box 1, a fixing seat 6 is welded on the left end and the middle part of the bottom plate, a bearing seat 61 is welded on the left end fixing seat 6, the left side of the stirring shaft 61 is tightly sleeved in the inner ring of the bearing of the bearing seat 61, the ventilation mechanism includes a hollow cylinder 71 and a bearing A72, and a bearing A72 is tightly sleeved and sealed in both sides of the cylinder 71 (sealing rings are installed on the left and right sides between the inner and outer rings of the bearing A72), The middle of the outer end of the cylinder 71 is welded to the right end opening of the fermentation box 1, and the right part of the stirring shaft 3 is respectively installed in the inner ring of the two bearings A72 with a sealing sleeve. A driven pulley 73 is welded on the right side of the stirring shaft on the outer side of the cylinder, and the lower end of the cylinder 71 is welded to the middle fixed seat 6; a fixed platform 74 is welded to the right end of the bottom plate 2, and the motor M is bolted to the left end of the fixed platform 74. A driving pulley 75 is welded to the left end of the rotating shaft of the motor M, and three transmission belts 76 are arranged on the outer ring between the driving pulley 75 and the driven pulley 73; the control mechanism includes a fan M1 and a fixed shell 81, and the fixed shell 81 and the fan M1 are respectively It is bolted to the right end of the fixed platform 74, an electric heating plate RT is installed on the left and right sides of the fixed shell 81, an air inlet pipe 82 and an air outlet pipe 83 are welded to the lower right end and upper left end of the fixed shell 81, the air inlet pipe 82 and the air outlet pipe of the fan M1 are connected through a pipeline, a connecting pipe is welded to the outside of the middle of the upper end of the cylinder 71, and the lower end of the connecting pipe is connected to the exhaust pipe 83 through a pipeline, the temperature switch W is installed on the right side of the upper end of the fermentation box 1 and its temperature sensing surface is located at the upper end of the fermentation box 1; the power module E1, the time control circuit E2, the heat dissipation control circuit 4, and the temperature rise control circuit 5 are installed in the component box 9 at the front end of the fixed platform. The lower left and right ends of the outer side of the fermentation box 1 are welded to the inner upper ends of the two fixing seats 6.

[0016] Figure 1 , 2As shown, the stirring shaft 3 is located between two bearings A in the barrel and has a plurality of air inlet holes 311 distributed on the surface. The front and rear ends of the stirring blade 31 are respectively provided with a plurality of air vents 312, and the front and rear parts of the discharge port 103 are respectively welded with a "[", "]"-shaped guide groove 105, and a sliding sealing plate A106 is installed in the guide inner sliding seal. A one-way air valve 107 is installed at the upper left part of the fermentation box 1 (the air entering the fermentation box 1 is discharged to the outer end of the fermentation box 1 through the one-way air valve 107), and the air inlet pipe of the one-way air valve 107 is interconnected with the fermentation box 1. The heat dissipation control circuit includes an adjustable resistor RP, a resistor R1, a transistor Q1 and a relay K1 connected by circuit board wiring, one end of the adjustable resistor RP is connected to one end of the resistor R1 and the base of the transistor Q1, the collector of the transistor Q1 is connected to the negative power input end of the relay K1, and the other end of the resistor R1 is connected to the emitter of the transistor Q1. The temperature rise control circuit includes an adjustable resistor RP1, a resistor R2, a transistor Q2, relays K2 and K3, and a diode VD1 connected through circuit board wiring. One end of the adjustable resistor RP1 is connected to one end of the resistor R2 and the base of the transistor Q2. The collector of the transistor Q2 is connected to the negative power input end of the first relay K2 and the negative pole of the diode VD1. The other end of the resistor R2 is connected to the emitter of the transistor Q2. The positive pole of the diode VD1 is connected to the negative power input end of the second relay K3. The positive power input ends of the two relays K2 and K3 are connected.

[0017] Figure 1 , 2As shown, the power input terminals 1 and 2 of the power module E1, the power input terminals 1 and 2 of the time control circuit E2, the control power input terminal of the heat dissipation control circuit, the control power input terminal of the relay K1 (connected to one pole of the 220V power supply), the control power input terminals of the relays K2 and K3 of the temperature rise control circuit (connected to one pole of the 220V power supply) and the two poles of the AC 220V power supply are connected via wires. The power output terminals 3 and 4 of the power module E1, the power input terminal of the heat dissipation control circuit, the positive power input terminal of the relay K1 and the emitter of the transistor Q1, the positive power input terminals of the relays K2 and K3 of the temperature rise control circuit and the emitter of the transistor Q2 are connected via wires. The power output terminals 3 and 4 of the time control circuit E2 are connected to the power input terminals of the motor M through wires, the normally open contact terminal of the power output terminal of the heat dissipation control circuit, the other pole of the 220V AC power supply, and the power input terminals of the fan M1 are connected through wires, the normally closed contact terminal of the power output terminal of the temperature rise control circuit, the other pole of the 220V AC power supply, and the power input terminals of the fan M1 are connected through wires, the normally closed contact terminal of the relay K3, the other pole of the 220V AC power supply, and the power input terminals of the electric heating plate RT are connected through wires. The two ends of the temperature switch W and the positive power input terminal of the relay K1 at the signal input terminal of the heat dissipation control circuit and the emitter of the transistor Q1 are connected through wires, and the base of the transistor Q1 at the signal output terminal of the heat dissipation control circuit and the other end of the adjustable resistor RP1 at the signal input terminal of the temperature rise control circuit are connected through wires.

[0018] Figure 1 , 2As shown, after the 220V AC power enters the power input terminal of the power module E1, the 3rd and 4th pins of the power module E1 output a stable DC 12V power supply and enter the power input terminal of the heat dissipation control circuit and the temperature rise control circuit. Before fermentation, the staff opens the bolts fixing the sealing plate 102 and puts the raw materials into the fermentation box 1, and then fixes the sealing plate 102. After the time control circuit E2 is powered on, its 3rd and 4th pins will output a period of power to the power input terminal of the motor M at intervals (for example, outputting 10 minutes of power every 10 hours, the time is adjustable). After the motor M is powered on, its rotating shaft drives the driven pulley 73 to rotate through the driving pulley 75 and the transmission belt 76, and the driven pulley 73 drives the stirring blade 31 to rotate through the stirring shaft 3 to stir the raw materials in the fermentation box 1. The stirring blade 31 fully stirs and mixes the raw materials in the fermentation box 1, thereby improving the fermentation effect (and playing a heat dissipation role). After the heat dissipation control circuit is powered on, when the temperature in the fermentation box 1 is lower than a certain level (for example, lower than 40°C), the temperature of the temperature sensing surface of the temperature switch W is relatively low, and its resistance value is relatively large, and the voltage divided between the adjustable resistors RP and R1 is relatively large. In this way, the 12V power supply enters the base of the transistor Q1 below 0.7V after voltage divided between the temperature switch W, the adjustable resistors RP and R1. The collector of the transistor Q1 is cut off and does not output a low level to enter the negative power input terminal of the relay K1. The relay K1 loses power and does not attract, and its control power input terminal and the normally open contact terminal are open, and the fan M1 will not be powered on. When the temperature in the fermentation box 1 is higher than a certain value (for example, higher than 40°C), the temperature of the temperature sensing surface of the temperature switch W is relatively high, and its resistance value is relatively small. The voltage divided between the adjustable resistors RP and R1 is relatively small. In this way, the 12V power supply enters the base of the transistor Q1 after the voltage divided between the temperature switch W, the adjustable resistors RP and R1, and is higher than 0.7V. The transistor Q1 conducts and the collector outputs a low level and enters the negative power input terminal of the relay K1. The relay K1 is energized to attract its control power input terminal and the normally open contact terminal to close, and the fan M1 will be energized to work. After the fan M1 is energized to work, a large high-speed air will be generated to enter the stirring shaft 3 through the air inlet 311 of the hollow stirring shaft 3, and then blown out at high speed through the multiple vents 312 of the multiple stirring blades 31, blowing the raw materials in the fermentation box, and the flowing air is discharged outward through the one-way air valve. The outflowing air will take out the heat generated in the fermentation box 1, thereby reducing the fermentation temperature. After a period of time, when the temperature in the fermentation box is lower than 40°C again, the relay K1 loses power again, and the fan M1 loses power again and does not work. Through the above, the present invention can cool down the temperature of the fermentation box by blowing air through the fan when the temperature in the fermentation box rises, reducing the probability of microorganisms losing activity due to excessive raw material temperature.

[0019] Figure 1 , 2As shown, after the temperature rising control circuit is powered on, when the temperature in the fermentation box 1 is lower than a certain level (for example, lower than 35°C), the temperature of the temperature sensing surface of the temperature switch W is relatively low, and its resistance value is relatively large, and the voltage divided between the adjustable resistors RP1 and R2 is relatively large. In this way, the 12V power supply enters the base of the transistor Q2 below 0.7V after voltage divided between the temperature switch W, the adjustable resistors RP1 and R2. The collector of the transistor Q2 is cut off and does not output a low level to enter the negative power input terminal of the relay K2, and does not conduct unidirectionally through the diode VD1 to enter the negative power input terminal of the relay K3. When the relays K2 and K3 lose power and do not attract, their control power input terminals and normally closed contact terminals are closed, and the fan M1 and the electric heating plate RT are powered on and work; in this way, the electric heating plate RT is powered on and generates heat, and the fan M1 generates a relatively large high-speed air flow to carry away the heat generated by the electric heating plate RT and enter the stirring shaft 3 through the air inlet 311 of the hollow stirring shaft 3, and then blow out at high speed through the multiple air vents 312 of the multiple stirring blades 31, so as to blow and heat the raw materials in the fermentation box, and the flowing air is discharged outwardly through the one-way air valve, the temperature in the fermentation box 1 will increase, thereby increasing the temperature in the fermentation box. When the temperature in the fermentation box 1 is higher than a certain level (for example, higher than 35°C), the temperature of the temperature sensing surface of the temperature switch W is relatively high, and its resistance value is relatively small. The voltage divided between the adjustable resistors RP1 and R2 is relatively small. In this way, the 12V power supply enters the base of the transistor Q2 after the voltage divided between the temperature switch W, the adjustable resistors RP1 and R2, and is higher than 0.7V. The transistor Q2 conducts and the collector outputs a low level and enters the negative power input terminal of the relays K2 and K3. The relays K2 and K3 are no longer powered and their control power input terminals and normally closed contact terminals are open. The fan M1 and the electric heating plate RT are no longer powered to work. Through the above, the new type can heat up the fermentation box by blowing in air through the fan and releasing heat from the electric heating plate RT when the temperature in the fermentation box is low, reducing the probability of the microorganisms losing their activity due to the low temperature of the raw materials. The subsequent staff pulls the sealing plate A to the right end along the guide groove 105, and the raw materials in the fermentation box will be discharged through the discharge port 102 into the transfer box pre-placed at the bottom.

[0020] Figure 1 , 2 As shown, the novel device is more compact as a whole, more convenient to use, and has good technical effects of the invention. Figure 2In the figure, the motor M is an AC motor with a power of 2KW and a voltage of 220V; the relays K1, K2, and K3 are of DC12V; the power module E1 is a finished product of a switching power module of AC 220V to DC 12V; the transistors Q1 and Q2 are NPN transistors of model 9013; the time-controlled switch E2 is a finished product of a time-controlled switch of model KG316t, which has two power input terminals, two power output terminals, and seven setting buttons. By operating the seven setting buttons respectively, the interval time of the output power of the two power output terminals can be set. The time for each power output (working voltage AC 220V); the temperature switch W is a negative temperature coefficient thermistor of model MF52D; the resistance values ​​of resistors R1 and R2 are 25K; the resistance values ​​of adjustable resistors RP and RP1 are 470K (adjusted to 40K and 35K respectively in this embodiment). During production, the handles of the adjustable resistors RP and RP1 are located outside the front opening of the component box, and the component box at the side end of the handle of the adjustable resistors RP and RP1 is marked with continuous numbers representing the temperature. Specifically, the resistance value of the adjustable resistor RP is adjusted The larger or smaller the resistance value of the adjustable resistor RP1 is, the larger or smaller the voltage divided between it and the resistor R1 is, then, in actual circumstances, the lower or higher the temperature in the fermentation tank is, the transistor Q1 will be turned on, that is, the temperature threshold value of the temperature reduction control circuit of the present invention is set to be relatively low or relatively large; the larger or smaller the resistance value of the adjustable resistor RP1 is, the larger or smaller the voltage divided between it and the resistor R2 is, then, in actual circumstances, the lower or higher the temperature in the fermentation tank is, the transistor Q2 will be turned on, that is, the temperature threshold value of the temperature increase control circuit of the present invention is set to be relatively low or relatively large. Relatively low or relatively large; the electric heating plate RT is a finished product of a PTC stainless steel armored constant temperature electric heating plate with an operating voltage of AC 220V and a power of 2KW (temperature 50°C, due to the heat dissipation of the flowing air of the fan after entering the fermentation box, the actual temperature is more than 40 degrees); the fan includes a motor (1KW) and a volute, and blades. The right end of the volute and the left end of the motor are installed together, the rotating shaft of the motor is located in the volute, the blades are tightly sleeved on the outer end of the rotating shaft, the upper end of the volute has an air inlet, and the left side has an air outlet; the diode VD1 model is 1N4007.

[0021] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is defined by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0022] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A biological fermentation reaction device, comprising a fermentation box, a motor, a bottom plate, a temperature switch, a stirring shaft, and a time control circuit, wherein the fermentation box has a feeding port and a sealing plate, and the lower end of the fermentation box has a discharge port, characterized in that: It also has a heat dissipation control circuit, a temperature rise control circuit, a control mechanism, and a ventilation mechanism; a plurality of hollow stirring blades that communicate with the interior of the stirring shaft are installed on the outer side of the stirring shaft, and openings are respectively provided on both side ends of the fermentation box, one end of the stirring shaft is rotatably installed in one of the openings in the fermentation box, and fixed seats are respectively installed on one end and the middle of the bottom plate, one of the fixed seats is installed with a bearing seat, and the outer side of the stirring shaft is installed in the inner ring of the bearing of the bearing seat, and the ventilation mechanism includes a barrel and bearing A, at least two bearings A are respectively installed in both sides of the barrel, and the barrel is rotatably installed in another opening of the fermentation box, and the other end of the stirring shaft is installed in the inner rings of two bearings A, and a driven pulley is installed on the outer side of the stirring shaft, and the lower end of the barrel is installed on another fixed seat; a fixed platform is provided on the side end of the other fixed seat, and a motor is installed on one end of the fixed platform, and a driving pulley is installed on the rotating shaft of the motor. and the driven pulley are connected via a transmission belt; the control mechanism includes a fan and a fixed shell, the fixed shell and the fan are installed on the other end of the fixed platform, an electric heating plate is installed in the fixed shell, the fixed shell has an air inlet pipe and an exhaust pipe, the air inlet pipe is connected to the air outlet pipe of the fan, a connecting pipe is installed in the cylinder, the upper end of the connecting pipe is connected to the exhaust pipe, the temperature switch is installed outside the fermentation box and its temperature sensing head is located inside the fermentation box; the timing control circuit, the heat dissipation control circuit and the temperature rise control circuit are installed in the component box; the power output end of the timing control circuit is electrically connected to the power input end of the motor, the power output ends of the heat dissipation control circuit and the temperature rise control circuit are electrically connected to the power input ends of the fan and the electric heating plate respectively, the signal output end of the temperature switch is electrically connected to the signal input end of the heat dissipation control circuit, and the signal output end of the heat dissipation control circuit is electrically connected to the signal input end of the temperature rise control circuit.

2. A biological fermentation reaction device according to claim 1, characterized in that: The stirring shaft is located between two bearings A in the cylinder and has multiple air inlet holes distributed on its surface.

3. A biological fermentation reaction device according to claim 1, characterized in that: The stirring blade has a plurality of vent holes, and a guide groove is installed at the lower end of the discharge port, and a sealing plate A is installed in the guide groove for sliding sealing.

4. A biological fermentation reaction device according to claim 1, characterized in that: A one-way air valve is installed on one side of the upper end of the fermentation box.

5. A biological fermentation reaction device according to claim 1, characterized in that: The heat dissipation control circuit includes an electrically connected adjustable resistor, a resistor, a transistor and a relay, one end of the adjustable resistor is connected to one end of the resistor and the base of the transistor, the collector of the transistor is connected to the negative power input end of the relay, and the other end of the resistor is connected to the emitter of the transistor.

6. A biological fermentation reaction device according to claim 1, characterized in that: The temperature rise control circuit includes an electrically connected adjustable resistor, a resistor, a transistor, a relay, and a diode. One end of the adjustable resistor is connected to one end of the resistor and the base of the transistor. The collector of the transistor is connected to the negative power input end of the first relay and the negative pole of the diode. The other end of the resistor is connected to the emitter of the transistor. The positive pole of the diode is connected to the negative power input end of the second relay. The positive power input ends of the two relays are connected.

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