CN112266860A - Constant-temperature ventilation system for fermented food and implementation method thereof - Google Patents

Abstract

The invention discloses a constant-temperature ventilation system for fermented food and an implementation method thereof, the system comprises a fermentation tank, an air inlet pipe and an air outlet pipe are arranged on the side wall of the fermentation tank, the fermentation tank is provided with a heating box, a constant-temperature medium is filled in the heating box, the head end of the air inlet pipe is communicated with the heating box and used for heating air by the heating box and conveying the air into the fermentation tank through the air inlet pipe, a fan is arranged on one side of the heating box, the tail end of the fan extends into the constant-temperature medium of the heating box through an air supply pipeline, an air filter is arranged at the head end of the fan, and the fan sucks external. Through the steps of killing management and control, volatilizing cleanness, warm and humid configuration, temperature compensation debugging, ventilation fermentation to when expecting to solve current fermentation cylinder and carry out temperature control and improve pH value, local temperature deviation is big, and the viscosity increase in the fermentation cylinder can influence the problem of air current exchange.

Description

Constant-temperature ventilation system for fermented food and implementation method thereof

Technical Field

The invention relates to a food fermentation process, in particular to a constant-temperature ventilation system of fermented food and an implementation method thereof.

Background

The fermented food is a food processed and manufactured by using beneficial microorganisms, part of the food needs to be kept at a constant temperature in a fermentation process, and part of the beneficial microorganisms need oxygen in the fermentation process, so that regular ventilation in a fermentation tank is also part of a manufacturing process of the part of the fermented food.

The existing fermented food is generally placed in a fermentation tank in the preparation process, generally in order to supervise the quality of the fermented food, the temperature parameter is an important parameter beneficial to the propagation environment of microorganisms, and the pH value is an important index influencing the cell growth and the product synthesis, so the metabolism condition of the beneficial microorganisms is controlled by the temperature and the pH value. In general, factors related to the control of dissolved oxygen in the fermentation process are more, the fermentation tank generally has a smaller diameter and height, bubbles generated by fermentation are eliminated in time in the fermentation process, the mass transfer resistance of oxygen in fermentation liquor is reduced, the control of the dissolved oxygen is facilitated, and in the actual fermentation process, the stirring efficiency is improved, the ventilation volume is increased, and the solution coefficient can be effectively improved; when the fermentation is carried out in the middle and later stages, part of water is supplemented to dilute the fermentation liquor, so that the apparent viscosity of the fermentation liquor is effectively reduced, and the aeration effect is ensured.

In order to optimize temperature control and improve the pH value, the fermentation tank is usually provided with a built-in heating plate, the temperature environment of the fermented food is regulated and controlled by the heating plate, but the heating plate may cause the local temperature difference phenomenon to increase, although the cover of the fermentation tank is opened periodically, so that the fermentation tank has certain air exchange inside, the efficiency of the form is low, and meanwhile, the viscosity in the fermentation tank is increased, and the air exchange is influenced. It is therefore worthwhile to study how to optimize the air circulation of fermented food products in order to ensure the quality of the food products.

Disclosure of Invention

The invention aims to provide a constant-temperature ventilation system for fermented food and an implementation method thereof, aiming at solving the problems that when the temperature of the existing fermentation tank is controlled and the pH value is improved, the local temperature deviation is large, the viscosity in the fermentation tank is increased, and the air flow exchange is influenced.

In order to solve the technical problems, the invention adopts the following technical scheme:

the utility model provides a constant temperature ventilation system of fermented food, including the fermentation cylinder, above-mentioned fermentation tank lateral wall is equipped with intake pipe and outlet duct, above-mentioned fermentation cylinder is equipped with the heating cabinet, fill the constant temperature medium in the above-mentioned heating cabinet, above-mentioned intake pipe head end intercommunication heating cabinet for by the heating cabinet heat the air and carry the fermentation cylinder through the intake pipe in, above-mentioned heating cabinet one side is equipped with the fan, above-mentioned fan is terminal to stretch into the constant temperature medium of heating cabinet through the air supply line, above-mentioned fan head end is equipped with air cleaner, above-mentioned fan inhales external air through air cleaner and carries the.

Preferably, the heating box is provided with an insertion opening through which the air supply duct extends into the heating box, sealing rings are provided at both ends of the insertion opening for filling a gap between the air supply duct and the insertion opening with the sealing rings, a lead-out opening is provided at an upper end of the heating box, the lead-out opening is communicated with the air inlet pipe, and a gauze filter is provided in the lead-out opening.

Preferably, the lower end of the heating box is provided with a material port for increasing and decreasing a constant temperature medium in the heating box, the material port is provided with a first switch valve, and the upper end of the heating box is provided with an electronic hygrothermograph for displaying parameters on an electronic screen outside the heating box by the electronic hygrothermograph.

Preferably, the air inlet pipe surrounds the side wall of the fermentation tank, an air distribution pipeline is arranged at the bottom of the fermentation tank, the tail end of the air inlet pipe is communicated with the air distribution pipeline, a plurality of release openings are formed in the side wall of the air distribution pipeline, a water outlet is formed in the lower end of the air distribution pipeline, a slope is arranged in the air distribution pipeline, and the slope gradually inclines from the two ends of the air distribution pipeline to the water outlet.

Preferably, the air filter includes a housing, a sterilizing chamber is disposed at an upper portion of the housing, a filtering chamber is disposed at a lower portion of the housing, an output port is disposed at an upper end of the sterilizing chamber, a suction port is disposed at a lower end of the filtering chamber, the output port communicates with a head end of the fan, and the suction port communicates with an external atmosphere.

The sterilizing chamber is provided with more than two transparent guide plates, the two adjacent transparent guide plates are parallel to each other, an air flow channel is formed between the transparent guide plates, and the transparent guide plates are internally provided with ultraviolet lamps.

The technical scheme is that the filter chamber comprises a first filter chamber and a second filter chamber, the second filter chamber is communicated with the sterilization chamber, the suction inlet is formed in the side wall of the first filter chamber, the first filter chamber is provided with an air filter element, and the second filter chamber is provided with an active carbon filter screen.

The invention also discloses a constant-temperature ventilation implementation method of the fermented food, which mainly comprises the following steps: step A, sterilizing and managing, namely idling the fermentation tank and the heating box, opening the fermentation tank, and spraying disinfectant into the fermentation tank to sterilize and clean until no bacteria are left in the fermentation tank.

And step B, volatilizing cleanly, heating the interior of the fermentation tank to 40 ℃ after no bacteria residue exists in the fermentation tank, starting the fan, injecting airflow into the fermentation tank by the fan, and closing the fan until the moisture in the fermentation tank is completely volatilized.

And step C, preparing temperature and humidity, namely after the moisture in the fermentation tank is completely volatilized, injecting distilled water into the heating tank, putting a temperature and humidity meter into the fermentation tank, starting the fan, gradually increasing the ventilation quantity, and collecting the temperature and humidity parameters of the fermentation tank by a worker through the temperature and humidity meter.

D, temperature compensation debugging, namely keeping the ventilation quantity of the fermentation tank and the temperature inside the fermentation tank constant, heating the distilled water in the heating box to 10-40 ℃, setting a plurality of temperature nodes in the temperature change process, keeping the distilled water in the heating box at the constant temperature for more than 10 minutes at each temperature node, and collecting the temperature and humidity parameters of the fermentation tank by a worker through a hygrothermograph and recording the temperature and humidity parameters; after the recording was completed, the blower was turned off and the heating of the distilled water was stopped.

And E, ventilating and fermenting, namely placing the material in a fermentation tank, keeping the temperature in the fermentation tank constant according to the material fermentation temperature requirement, starting a fan to realize airflow circulation in the fermentation tank according to the material fermentation ventilation requirement, monitoring and detecting the temperature change in the fermentation tank in real time by workers, and when the temperature in the fermentation tank is lower than a threshold value, heating distilled water by a heating box to increase the temperature, so that the heat loss in the fermentation tank is supplemented through airflow.

Preferably, in the volatilization cleaning and ventilation fermentation process, the worker holds the sampler with hands, pumps air in the fermentation tank into the sampler, obtains an airborne microorganism aerosol sample from the sampler, and cultures the airborne microorganism aerosol sample through a culture medium to detect the microorganism state in the fermentation tank.

Compared with the prior art, the invention has the beneficial effects of at least one of the following:

according to the invention, a normal air pressure state is maintained when the fermentation tank is ventilated through the air inlet pipe and the air outlet pipe, on the basis of the heating function of the fermentation tank, the air is heated by filling a constant-temperature medium in the heating box, the fan provides power required by air flow, and the air is conveyed into the fermentation tank through the air inlet pipe, so that on one hand, heat dispersion in the fermentation tank is facilitated, and the heat energy distribution in the fermentation tank is ensured to be more uniform. The situation that the fermentation liquor is too viscous and has poor dissolved oxygen is avoided, and the risk of slow metabolism caused by difficult release of carbon dioxide in the fermentation liquor is reduced.

According to the invention, the air filter is used for filtering the air entering the fermentation tank, so that the influence of external microorganisms or bacteria on the fermentation quality caused by the entering of the external microorganisms or bacteria into the fermentation tank is avoided.

The invention ensures the sealing performance of the air supply pipeline connected with the heating box through the insertion hole and the sealing ring, and avoids floating objects existing in the heating box due to accidents from entering the fermentation tank through the guide outlet and the gauze filter screen.

According to the invention, different types of constant-temperature media can be selectively added and reduced into the heating box through the material port, and the material port is selectively opened and closed through the first switch valve, so that the heating box is effectively ensured to be at a relatively stable temperature, thus ensuring that the air flow has a certain temperature during ventilation, and avoiding the influence of the air flow on the temperature inside the fermentation tank to cause deviation.

The air inlet pipe provided by the invention surrounds the fermentation tank, so that the temperature inside the fermentation tank is kept balanced, air is uniformly dispersed to the plurality of release ports through the air distribution pipeline, the air is dispersed to the fermentation tank through the release, and the generated liquid is introduced into the water outlet through a slope and uniformly discharged through the water outlet if the air is liquefied due to the possibility of certain degree of cooling in the flowing process.

The filter of the invention carries out double purification through the sterilizing chamber and the filtering chamber, introduces air into the filtering chamber through the suction inlet, filters dust and most pollutants in the air, and kills bacteria contained in the air through the sterilizing chamber. The sterilizing chamber forms an air channel through the transparent guide plate, ensures the sufficient irradiation range of the ultraviolet lamp and is beneficial to killing bacteria in the air by the ultraviolet lamp; the filter chamber carries out double filtration through first filter chamber and second filter chamber, utilizes dust and solid matter in the air of air filter core isolated, and the pollutant in volatile organic compound formaldehyde, toluene, hydrogen sulfide, chlorobenzene and the air is got rid of through the active carbon filter screen to the rethread.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic view of an intake pipe distribution.

Fig. 3 is a schematic view of the air filter of the present invention.

Description of reference numerals:

1-fermentation tank, 2-air outlet pipe, 3-air inlet pipe, 4-heating box, 5-blower, 6-air supply pipeline, 7-air filter, 8-sterilizing chamber, 9-filtering chamber, 301-air distribution pipeline, 302-releasing port, 303-water outlet, 304-slope, 401-inserting port, 402-sealing ring, 403-leading-out port, 404-gauze filter screen, 405-material port, 406-first switch valve, 407-electronic hygrothermograph, 701-shell, 801-output port, 802-transparent guide plate, 803-purple light lamp, 901-suction port, 902-first filtering cavity, 903-second filtering cavity, 904-air filter core and 905-active carbon filter screen.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Example 1:

referring to fig. 1, an embodiment of the present invention is a constant temperature ventilation system for fermented food and a method for implementing the same, including a fermentation tank 1, wherein an air inlet pipe 3 and an air outlet pipe 2 are provided on a side wall of the fermentation tank 1, and after air is input into the fermentation tank 1 through the air inlet pipe 3, the fermentation tank 1 releases an equal amount of air from the air outlet pipe 2 due to air pressure. Wherein, the air inlet pipe 3 and the air outlet pipe 2 are both provided with check valves to prevent the gas from flowing in a guiding way. Wherein, fermentation cylinder 1 is current commodity, and fermentation cylinder 1 embeds agitator and hot plate carries out control to a certain extent through the agitator to the viscosity of zymotic fluid, and in the actual operation in-process, the stirring dynamics that needs the restraint agitator drives through inverter motor usually, and the shearing force of avoiding the too big production of stirring dynamics is too strong, and causes the hypha too loose, garrulous, leads to the viscosity of hypha volume to lose to the hypha is difficult for growing.

When the mycelium is too scattered and broken, the stirring speed of the stirrer needs to be reduced by the variable frequency motor, and the air flow needs to be properly reduced simultaneously so as to gradually improve the viscosity of the fermentation liquor.

The fermentation tank 1 is provided with a heating box 4, the heating box 4 is filled with a constant temperature medium, the heating box 4 is a sealed box body, and the inner wall of the heating box 4 is provided with a heating wire for heating the constant temperature medium in the heating box 4 by the heating wire so as to enable the constant temperature medium to be at a controllable temperature. Wherein the constant temperature medium can be the existing distilled water or other temperature control liquid containing ammonia.

In addition, if the fermentation liquid in the fermentation tank 1 is too viscous, the dissolved oxygen is relatively poor, and the liquid level turnover is relatively poor, so that carbon dioxide in the fermentation liquid is not easy to release, and the metabolism is slow. Particularly, in the aerobic fermentation process for the fermentation of the antibiotic, if the dissolved oxygen is low, the oxygen supply is insufficient, and the hypha growth and metabolism are abnormal, the fermentation water is influenced.

The head end of the air inlet pipe 3 is communicated with the heating box 4 and used for heating air by the heating box 4 and conveying the air to the fermentation tank 1 through the air inlet pipe 2, a fan 5 is arranged on one side of the heating box 4, the tail end of the fan 5 extends into a constant-temperature medium of the heating box 4 through an air supply pipeline 6, an air filter 7 is arranged at the head end of the fan 5, and the fan 5 sucks external air through the air filter 7 and conveys the air to the heating box 4.

Through fan 5 work, inhale air cleaner 7 with external air, filter the back through air cleaner 7, fan 5 carries air supply line 6 again with the air, pours into the constant temperature medium of heating cabinet 4 into with the air through air supply line 6 in, because the constant temperature medium is liquid, so can wash once to the air, contains certain moisture after the washing and carries fermentation cylinder 1 by intake pipe 2.

Wherein, in order to control the time when the air inlet pipe 2 delivers air to the fermentation tank 1, a valve for controlling the circulation of the air inlet pipe is arranged on the air inlet pipe 2.

It should be noted that, in the actual working process, local temperature deviation may occur when the fermentation tank 1 is heated by the heating plate of the fermentation tank 1 itself, and at this time, through the flow of air in the fermentation tank 1, it can be ensured that heat energy is uniformly distributed, in this process, the temperature of the heating plate can be gradually raised, the physical state of the fermentation liquid can be changed, so that the viscosity of the fermentation liquid is reduced, thereby being beneficial to improving the dissolved oxygen level of the fermentation liquid and being beneficial to the normal growth and metabolism of hyphae.

Therefore, the ventilation performance of the fermentation tank 1 is improved, particularly for fermented foods of different processes, adjustment can be performed according to the hypha growth metabolism state, such as temperature adjustment, such as stirring force adjustment, meanwhile, the constant-temperature medium can contain ammonia liquid when necessary, the situation that the overall metabolism speed is low can be improved when the ammonia liquid enters the fermentation tank 1 along with air, and attention needs to be paid to reduction in ammonia feeding operation and reduction in ammonia concentration so as to prevent excessive ammonia from failing to metabolize and forming new abnormal metabolism.

Example 2:

according to another embodiment of the present invention, the heating box 4 is provided with an insertion opening 401, the air supply duct 6 extends into the heating box 4 through the insertion opening 401, sealing rings 402 are provided at both ends of the insertion opening 401 for filling a gap between the air supply duct 6 and the insertion opening 401 with the sealing rings 402, a lead-out opening 403 is provided at an upper end of the heating box 4, the lead-out opening 403 is communicated with the air inlet pipe 2, and a gauze filter 404 is provided in the lead-out opening 403.

The size of the insertion opening 401 is matched with the air supply pipeline 6, the air supply pipeline 6 is sleeved with the sealing ring 402, so that the air supply pipeline 6 is in interference fit with the insertion opening 401, the sealing ring 402 fills a gap between the air supply pipeline 6 and the insertion opening 401, and outside atmosphere is prevented from entering the heating box 4 through the insertion opening.

After the air supply pipeline 6 injects the air into the heating box 4, the air contacts the constant temperature medium in the heating box 4, at the moment, the air is washed by the constant temperature medium, and a heat exchange is simultaneously completed to form hot air, and the hot air rises to form an ascending air flow, flows to the air inlet pipe 2 through the leading-out port 403, and enters the fermentation tank 1 through the air inlet pipe 2.

The hot air is filtered by the gauze filter 404 once in the process of passing through the outlet 403, and the gauze filter 404 is used as a protection, so that the risk that part of dust enters the constant-temperature medium in the insertion port 401 due to an accident situation is reduced.

Example 3:

based on the above embodiment, another embodiment of the present invention is that the lower end of the heating box 4 is provided with a material port 405 for increasing and decreasing the constant temperature medium into the heating box 4, the material port 405 is provided with a first switch valve 406, and the upper end of the heating box 4 is provided with an electronic hygrothermograph 407 for displaying parameters on an electronic screen outside the heating box 4 by the electronic hygrothermograph 407.

Wherein, material mouth 405 lower extreme is current material pipeline, material pipeline upper end intercommunication heating cabinet 4, and material pipeline lower extreme is equipped with quick-operation joint, and heating cabinet 4 lower extreme is arranged in to material mouth 405 to open first switch valve 406 back, the constant temperature medium in the heating cabinet 4 can flow. It should be noted that when the constant temperature medium is supplied to the heating box 4, the constant temperature medium is generally supplied to the heating box 4 through the pipeline with the corresponding caliber matching the quick coupling, then the first switch valve 406 is opened to hermetically inject the constant temperature medium into the heating box 4, after the injection is completed, the first switch valve 406 is closed, and then the pipeline with the corresponding caliber is taken down from the quick coupling.

Example 4:

based on the above embodiment, referring to fig. 2, another embodiment of the present invention is that the air inlet pipe 3 is surrounded on the side wall of the fermentation tank 1, wherein the air inlet pipe 3 enters the fermentation tank 1 from the side wall of the fermentation tank 1 and gradually surrounds the fermentation tank 1 from top to bottom, and the air inlet pipe 3 is made of copper inside the fermentation tank 1, so that the heat energy of the fermentation tank 1 and the air inlet pipe 3 are kept uniform.

The bottom of the fermentation tank 1 is provided with a gas distribution pipeline 301, wherein the gas distribution pipeline 301 is arc-shaped, the tail end of the gas inlet pipe 3 is communicated with the gas distribution pipeline 301, the gas flow input by the gas inlet pipe 3 is distributed in the gas distribution pipeline 301, the side wall of the gas distribution pipeline 301 is provided with a plurality of release ports 302, the calibers of the release ports 302 are smaller, the number of the release ports 302 is larger, and therefore the gas flow in the gas distribution pipeline 301 can enter the release ports 302 under the pressure transmitted by the fan 5 and is injected from different positions of the fermentation tank 1.

A water outlet 303 is provided at the lower end of the air distribution duct 301, a slope 304 is provided in the air distribution duct 301, and the slope 304 is gradually inclined from both ends of the air distribution duct 301 to the water outlet 303. Due to the possible existence of a certain amount of moisture in the air, the moisture may be slightly liquefied during the air flowing process, and the liquid flows into the air distribution pipe 301 along the air inlet pipe 3, then is guided by the slope 304 to flow into the water outlet 303, and finally is uniformly discharged from the water outlet 303.

Example 5:

based on the above embodiment, referring to fig. 3, another embodiment of the present invention is that sterile air is the key fluid in the aeration fermentation process. In general, during aeration, the contamination of the air system has always been listed as the first risk of contamination in the fermentation process. The air system leaks to cause fermentation contamination, which is a high-incidence situation.

The air filter 7 includes a housing 701, a sterilizing chamber 8 is provided on the upper portion of the housing 701, a filtering chamber 9 is provided on the lower portion of the housing 701, an output port 801 is provided on the upper end of the sterilizing chamber 8, a suction port 901 is provided on the lower end of the filtering chamber 9, the output port 801 is connected to the head end of the fan 5, and the suction port 901 is connected to the outside atmosphere.

Wherein, in view of the requirements related to food production, the external atmosphere refers to the external atmosphere of the fermentation tank 1, and the environment thereof is the environment inside the production workshop, i.e. the external atmosphere is the air inside the production workshop. And because the external environment of the fermentation tank 1 is the interior of the production workshop, and the air in the production workshop is the oxygen-containing gas filtered by the ventilation and purification equipment arranged in the factory. In brief, the air inside the production workshop is subjected to the pretreatment of temperature reduction, water removal, oil removal and dehumidification before entering the workshop. Thus, the air filter 7 mainly takes into account risk factors inside the sterile workshop.

The housing 701 is used as a bearing unit, the housing 701 is relatively sealed and divided into a sterilizing chamber 8 and a filtering chamber 9, a suction inlet 901 of the housing is communicated with the head end of the filtering chamber 9, the tail end of the filtering chamber 9 is communicated with the head end of the sterilizing chamber 8, the tail end of the sterilizing chamber 8 is communicated with an output port 801, and then air is pumped out from the output port 801 by a fan 5.

Further, in order to ensure the sterilization efficiency, more than two transparent guide plates 802 are arranged in the sterilization chamber 8, the two adjacent transparent guide plates 802 are parallel to each other, an airflow channel is formed between the transparent guide plates 802, the purple light lamp 803 is arranged in the transparent guide plates 802, and a surrounding airflow channel is formed through the transparent guide plates 802, so that the airflow retention time is increased, and the transparent guide plates 802 are made of transparent materials, so that the irradiation range of the purple light lamp 803 is ensured to be large enough to meet the sterilization requirement.

The ultraviolet lamp 803 utilizes ultraviolet disinfection to control pathogenic microorganisms to propagate by utilizing air, and because of the movement of air flow, the ultraviolet disinfection belongs to dynamic disinfection and is easily influenced by wind speed, temperature and reflective materials, so that the power of the fan 5 is restricted according to the typical wind speed design of the optimal ultraviolet flowing air disinfection, the air speed is maintained at 2-3 m/s, and although the contact time of the air flow and the ultraviolet lamp 803 is relatively short, the ultraviolet lamp radiation intensity of the ultraviolet lamp 803 can be improved through the transparent guide plate 802 and is relatively uniform in the disinfection chamber 8.

Further, the filtering chamber 9 includes a first filtering chamber 902 and a second filtering chamber 903, the second filtering chamber 903 is communicated with the sterilizing chamber 8, the suction port 901 is disposed on a side wall of the first filtering chamber 902, the first filtering chamber 902 is provided with an air filter 904, and the second filtering chamber 903 is provided with an activated carbon filter 905. Through first filter chamber 902 and second filter chamber 903, form dual filtration effect, wherein air filter 904 is current air commodity, through air filter 904 hollow position intercommunication suction inlet 901, and its air filter 904 end is equipped with the plug, makes the air current pass through from the filter layer of air filter 904 lateral wall to block that the dust gets into second filter chamber 903.

The activated carbon filter screen 905 adopts a honeycomb state of a through-hole structure to ensure adsorption efficiency and a wind resistance coefficient, so that the airflow filter chamber 9 can have good aerodynamic performance. It should be noted that the carbon content of the activated carbon filter screen 905 is 35% to 50%, so that the activated carbon filter screen 905 has high-efficiency adsorption performance of activated carbon, and can remove volatile organic compounds formaldehyde, toluene, hydrogen sulfide, chlorobenzene and pollutants in the air which may exist in the air during air purification.

Example 6:

based on the above embodiment, another embodiment of the present invention is a method for implementing constant temperature ventilation of fermented food, the method using the constant temperature ventilation system of fermented food mainly includes the following steps: step A, killing the management and control, with above-mentioned fermentation cylinder 1 and 4 vacant of heating cabinet, be the open mode to above-mentioned fermentation cylinder 1 to spray the antiseptic solution in the fermentation cylinder 1 and disinfect the washing and do not have the bacterium to remain until fermentation cylinder 1 is inside. In order to ensure the normal operation of the fermentation tank 1, the fermentation tank 1 needs to be regularly maintained and replaced with easily-damaged and consumable components, such as frequently-switched valves, and meanwhile, the functional states of the valves need to be kept in mind during the sterilization process, so that the valves can work normally, if the temperature is found in the process, the fermentation tank 1 needs to be timely stopped for maintenance or replacement, so that the risk of production accidents caused by the damage of the fermentation tank 1 is avoided, and it needs to be noted that after each sterilization, the inlet and outlet possibly arranged in the existing fermentation tank 1 need to be cleaned, including but not limited to an air inlet pipe 3, an air outlet pipe 2, a tank cover opening, an inoculation opening, an electrode socket and a sealing gasket, and if damaged components are found in the cleaning process, the replacement is. The air filter 7 is cleaned regularly, and the work load of dust accumulation on the fan 5 is reduced.

And step B, volatilizing cleanly, after no bacteria residue exists in the fermentation tank 1, heating the interior of the fermentation tank 1 to 40 ℃, starting the fan 5, injecting airflow into the fermentation tank 1 by the fan 5, and closing the fan 5 until the moisture in the fermentation tank 1 is completely volatilized. Through 5 work of fan, can exhaust in the fermentation cylinder 1 after guaranteeing when the pipeline is disinfected, reduce fermentation cylinder 1 after the disinfection, remaining tail gas causes the influence to the fermentation environment.

Step C, warm and humid configuration, after the moisture in the fermentation tank 1 is completely volatilized, the heating box 4 is filled with distilled water, a hygrothermograph is placed in the fermentation tank 1, the fan 5 is started, the ventilation volume is gradually increased, and a worker collects the temperature and humidity parameters of the fermentation tank 1 through the hygrothermograph; to determine the state of influence of the wind speed on the volume of the fermenter 1.

D, temperature compensation debugging, namely keeping the ventilation quantity of the fermentation tank 1 and the internal temperature of the fermentation tank 1 constant, heating the distilled water in the heating box 4 to 10-40 ℃, setting a plurality of temperature nodes in the temperature change process, keeping the distilled water in the heating box 4 at the constant temperature of each temperature node for more than 10 minutes, and collecting the temperature and humidity parameters of the fermentation tank 1 by a worker through a hygrothermograph and recording the temperature and humidity parameters; after the recording is finished, the fan 5 is closed and the distilled water heating is stopped;

wherein the temperature rise and fall processes are recorded at 10 to 40 ℃; from 10 to 40 degrees centigrade process, usually every 5 degrees centigrade of rising is a node, and the process that 40 degrees centigrade is reduced to 10 degrees centigrade similarly is also a node that is reduced by 5 degrees centigrade, accomplish a lift process, for measuring once, in order to guarantee the parameter accuracy, measure more than 2 times usually, each parameter node is the same, get the average value at last.

And E, ventilating and fermenting, namely placing the material in the fermentation tank 1, keeping the temperature in the fermentation tank 1 constant according to the material fermentation temperature requirement, starting the fan 5 to realize airflow circulation in the fermentation tank 1 according to the material fermentation ventilation requirement, monitoring and detecting the temperature change in the fermentation tank 1 by a worker in real time, and when the temperature in the fermentation tank 1 is lower than a threshold value, heating distilled water by the heating box 4 to increase the temperature, so that the heat loss in the fermentation tank 1 is supplemented through airflow.

Further, in the process of the volatilization cleaning and the ventilation fermentation, a worker holds the sampler by hand, air in the fermentation tank 1 is pumped into the sampler, the air microorganism aerosol sample is obtained from the sampler, and the air microorganism aerosol sample is cultured by the culture medium to detect the state of microorganisms in the fermentation tank 1. The sampler can be an existing Anderson six-level sampler, wherein the sampler is provided with 6 discs with micro sieve pores, the higher the level is, the smaller the pore diameter is, and the sampling plate is placed below the discs to collect microorganisms with different particle sizes in the air. The detection method is carried out according to the impact method specified in GB/T18204.3-2013.

The principle of the impact method is to use an impact type air microorganism sampler to pump indoor air into the sampler and enable the air to generate high-speed airflow through small holes, so that microorganism aerosol in the air is impacted on a sampling flat plate to be collected. And (3) placing the collected plate into a constant-temperature incubator for culture, and counting to obtain the colony number. Wherein the cultivation process is that samples are grouped and bacterial culture and fungal culture are carried out:

and (3) performing bacterial culture, weighing 33g of nutrient agar, placing the nutrient agar in 1000mL of distilled water, heating the nutrient agar by using an electric heating furnace until the nutrient agar is completely dissolved, and detecting the pH value of a solution to be detected to be in a range of 7.2 to 7.6. The steam sterilizer was set at 120 ℃ for 20 minutes. And in a clean workbench, selecting 90mm culture dishes, packaging 20mL of the culture dishes to obtain a bacterial culture medium, placing the sample on the sampling flat plate in the bacterial culture medium, and placing the sample in a constant-temperature incubator for culture.

Culturing fungus, weighing 70g of Sabouraud's agar, placing in 1000mL of distilled water, heating with electric heating furnace until completely dissolved, and detecting the pH value of the solution within the range of 5.5-6.0. The steam sterilizer was set to sterilize at 116 ℃ for 15 minutes. And in a clean workbench, selecting 90mm culture dishes, packaging 20mL of culture medium in each culture dish to obtain a fungus culture medium, placing the sample on the sampling flat plate in the fungus culture medium, and placing the sample in a constant temperature incubator for culture.

After the constant-temperature incubator finishes culturing, a plurality of samplers are used for simultaneously sampling bacteria and fungus aerosols at sampling points. The environment is kept clean during sampling, and workers can restrain the environment by themselves so as to prevent the content of microorganisms from changing due to talking or coughing. The sampling personnel wear the protective device to operate so as to prevent microorganisms generated by respiration from polluting the sampling culture dish.

Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," "a preferred embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (9)

1. The utility model provides a constant temperature ventilation system of fermented food, includes fermentation cylinder (1), fermentation cylinder (1) lateral wall is equipped with intake pipe (3) and outlet duct (2), its characterized in that: fermentation cylinder (1) is equipped with heating cabinet (4), pack constant temperature medium in heating cabinet (4), intake pipe (3) head end intercommunication heating cabinet (4) for by heating cabinet (4) to the air and carry fermentation cylinder (1) through intake pipe (2), heating cabinet (4) one side is equipped with fan (5), fan (5) end stretches into in the constant temperature medium of heating cabinet (4) through air supply line (6), fan (5) head end is equipped with air cleaner (7), fan (5) inhale external air through air cleaner (7) and carry heating cabinet (4).

2. The constant temperature and ventilation system for fermented food according to claim 1, wherein: heating cabinet (4) are equipped with inserted hole (401), gas supply line (6) stretch into heating cabinet (4) through inserted hole (401), inserted hole (401) both ends are equipped with sealing ring (402) for fill the clearance between gas supply line (6) and inserted hole (401) by sealing ring (402), heating cabinet (4) upper end is equipped with exports (403), exports (403) and intake pipe (2) intercommunication, be equipped with gauze filter screen (404) in exports (403).

3. The constant temperature and ventilation system for fermented food according to claim 1, wherein: heating cabinet (4) lower extreme is equipped with material mouth (405) to increase and decrease constant temperature medium in heating cabinet (4), be equipped with first ooff valve (406) on material mouth (405), heating cabinet (4) upper end is equipped with electron hygrothermograph (407) for show the parameter by electron hygrothermograph (407) on the outside electronic screen of heating cabinet (4).

4. The constant temperature and ventilation system for fermented food according to claim 1, wherein: intake pipe (3) encircle at fermentation cylinder (1) lateral wall, fermentation cylinder (1) bottom is equipped with branch gas pipeline (301), intake pipe (3) end intercommunication divides gas pipeline (301), divide gas pipeline (301) lateral wall to be equipped with a plurality of release mouth (302), divide gas pipeline (301) lower extreme to be equipped with outlet (303), divide gas pipeline (301) inside to be equipped with slope (304), slope (304) are by dividing gas pipeline (301) both ends to outlet (303) slope gradually.

5. The constant temperature and ventilation system for fermented food according to claim 1, wherein: the air filter (7) comprises a shell (701), a sterilizing chamber (8) is arranged on the upper portion of the shell (701), a filtering chamber (9) is arranged on the lower portion of the shell (701), an output port (801) is arranged at the upper end of the sterilizing chamber (8), a suction port (901) is arranged at the lower end of the filtering chamber (9), the output port (801) is communicated with the head end of the fan (5), and the suction port (901) is communicated with the outside atmosphere.

6. The constant temperature and ventilation system for fermented food according to claim 5, wherein: more than two transparent guide plates (802) are arranged in the sterilizing chamber (8), the two adjacent transparent guide plates (802) are parallel to each other, an air flow channel is formed between the transparent guide plates (802), and purple light lamps (803) are arranged in the transparent guide plates (802).

7. The constant temperature and ventilation system for fermented food according to claim 5, wherein: the filter chamber (9) comprises a first filter chamber (902) and a second filter chamber (903), the second filter chamber (903) is communicated with the sterilizing chamber (8), the suction port (901) is formed in the side wall of the first filter chamber (902), the first filter chamber (902) is provided with an air filter element (904), and the second filter chamber (903) is provided with an active carbon filter screen (905).

8. A method for realizing constant temperature ventilation of fermented food, which uses the constant temperature ventilation system of the fermented food of any one of claims 1 to 7, and mainly comprises the following steps:

step A, killing management and control, namely idling the fermentation tank (1) and the heating box (4), opening the fermentation tank (1), and spraying disinfectant into the fermentation tank (1) for disinfection and cleaning until no bacteria residue exists in the fermentation tank (1);

b, volatilizing and cleaning, after no bacteria residue exists in the fermentation tank (1), heating the interior of the fermentation tank (1) to 40 ℃, starting the fan (5), injecting airflow into the fermentation tank (1) by the fan (5), and closing the fan (5) until the moisture in the fermentation tank (1) is completely volatilized;

step C, preparing temperature and humidity, namely after the moisture in the fermentation tank (1) is completely volatilized, injecting distilled water into the heating box (4), putting a hygrothermograph into the fermentation tank (1), starting the fan (5), gradually increasing the ventilation volume, and collecting the temperature and humidity parameters of the fermentation tank (1) by a worker through the hygrothermograph;

d, temperature compensation debugging, namely keeping the ventilation quantity of the fermentation tank (1) and the internal temperature of the fermentation tank (1) constant, heating the distilled water in the heating box (4) to 10-40 ℃, setting a plurality of temperature nodes in the temperature change process, keeping the distilled water in the heating box (4) at the constant temperature of each temperature node for more than 10 minutes, and collecting the temperature and humidity parameters of the fermentation tank (1) by a worker through a hygrothermograph and recording the temperature and humidity parameters; after the recording is finished, the fan (5) is closed and the distilled water is stopped being heated;

and E, ventilating and fermenting, namely placing the material in the fermentation tank (1), keeping the temperature in the fermentation tank (1) constant according to the material fermentation temperature requirement, starting the fan (5) to realize airflow circulation in the fermentation tank (1) according to the material fermentation ventilation requirement, monitoring and detecting the temperature change in the fermentation tank (1) by a worker in real time, and when the temperature in the fermentation tank (1) is lower than a threshold value, heating distilled water by the heating box (4), and supplementing the heat loss in the fermentation tank (1) through airflow.

9. The method for realizing constant temperature ventilation of fermented food according to claim 8, characterized in that: the in-process of volatilizing clean and ventilation fermentation, the air in fermentation cylinder (1) is taken out to the sample thief to the handheld sample thief of staff to obtain air microorganism aerosol sample from the sample thief, cultivate air microorganism aerosol sample through the culture medium, in order to examine fermentation cylinder (1) interior microorganism state.

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