Cigar fermentation characteristic gas detection experiment device in constant-temperature and constant-humidity closed environment

Abstract

A cigar fermentation characteristic gas detection experiment device in a constant-temperature and constant-humidity closed environment comprises a box body and a cover plate, a bottom plate and a box wall of the box body are of jacket type structures and are provided with heat preservation layers, the jacket layers are externally connected with a circulating water bath system, a support is arranged on the bottom plate of the box body, a partition plate with holes is supported on the support, and an open container is placed on the partition plate. A humidity control medium (which can be a saturated salt solution) is contained in the container so as to ensure that the humidity in the closed space is stable, the open container is wrapped by a non-porous moisture permeable film, the cover plate is of a double-layer structure with a heat preservation layer, and four measuring holes are formed in the cover plate and used for placing NH3, CO2, O2, temperature and humidity sensor probes respectively. The device can keep a constant temperature and humidity condition under a closed condition, realizes real-time on-line measurement of temperature, humidity and characteristic gas concentration in a cigar tobacco fermentation process, and obtains a theoretical curve of escape gas concentration of cigar tobacco of different varieties and types in the fermentation process under different temperature and humidity conditions, so as to guide actual fermentation.

Description

TECHNICAL FIELD

[0001] The utility model relates to cigar fermentation equipment technical field especially relates to a kind of cigar fermentation characteristic gas detection experimental device under constant temperature and humidity closed environment. BACKGROUND

[0002] The pile fermentation of cigar tobacco is a key quality control link in the production process of cigar, which improves the aroma, flavor and combustion performance of tobacco through physical and chemical changes during fermentation. At present, the control of fermentation process mainly depends on the monitoring of temperature and humidity inside the pile. However, there are certain limitations in regulating the fermentation process by temperature and humidity changes, which is difficult to fully reflect the fermentation state and microbial activity, and is easy to lead to inaccurate judgment of fermentation endpoint, thereby affecting the stability of the quality of cigar tobacco after fermentation.

[0003] During the fermentation process, the decomposition of organic matter and microbial activity in tobacco will release a large amount of gas, such as carbon dioxide, ammonia and various volatile organic compounds. The release amount and composition change of these gases reflect the fermentation progress and microbial activity. Therefore, real-time monitoring of the escaping gas during fermentation not only helps to accurately grasp the fermentation state, but also makes up for the shortcomings of single temperature and humidity monitoring, making the control of fermentation process more uniform and accurate, thereby further improving the fermentation quality.

[0004] However, there are few applications of monitoring escaping gas during cigar fermentation process in the industry at present, especially the lack of measured curves of escaping gas concentration of different varieties and types of cigar tobacco during fermentation under constant temperature and humidity conditions as a basis for comparison. In order to solve this technical problem, it is necessary to place the cigar tobacco fermentation process in a closed environment with constant temperature and humidity, while the existing temperature and humidity control equipment is mostly open or semi-open system, which is connected with the outside atmosphere, and it is difficult to retain the escaping gas in a closed system, so it cannot be effectively measured, thus the precise quantitative detection of escaping gas during fermentation process cannot be realized. UTILITY MODEL CONTENT

[0005] The purpose of the utility model is to solve the technical problems existing in the background art, and a cigar fermentation characteristic gas detection experimental device under constant temperature and humidity closed environment is proposed. The experimental device can place 5-7 pieces of cigar tobacco for each experiment, which can ensure constant temperature and humidity in a closed environment, and at the same time detect the real-time curve of the concentration of escaping gas during fermentation process, and obtain the theoretical curve of the concentration of escaping gas of different varieties and types of cigar tobacco during fermentation under different temperature and humidity conditions. By comparing and analyzing the theoretical curve with the real-time monitoring data in the real fermentation process, it is helpful to adjust the fermentation operation according to the real-time data, ensure the uniformity and controllability of the fermentation process, and significantly improve the quality and stability of cigar fermentation.

[0006] The utility model discloses a purpose is realized through the following technical schemes,

[0007] A cigar fermentation characteristic gas detection experimental device in constant temperature and humidity closed environment, including box and apron, wherein: the bottom plate and the box wall of box are all jacketed structure and are equipped with insulating layer, and the jacketed layer is connected with circulating water bath system, the box bottom plate is fixed with support, is used for placing the perforated baffle that fermentation tobacco is supported on the support, and a movable open container is placed on the baffle, the container contains humidity control medium to guarantee the humidity stability in closed space, the open container is wrapped with non -porous moisture -permeable film, and the apron is double -deck structure with insulating layer, and four measuring holes are set up on the apron and are placed respectively with NH3, CO2, O2, temperature and humidity sensor probe.

[0008] Further, the box is provided with metal handles on both sides to facilitate carrying and moving; the apron is also provided with an apron handle, and the perforated baffle is provided with baffle handles on both sides to facilitate taking out and cleaning after fermentation is completed.

[0009] Further, the circulating water bath system includes a constant temperature water bath, a circulating pump and a temperature controller, which forms a temperature monitoring and feedback system with the temperature sensor inside the box to maintain the constant temperature in the box.

[0010] Further, the NH3, CO2, O2, temperature and humidity sensor transmits signals to the display device.

[0011] Further, a lock catch is provided on the upper part of the side of the box to fasten the apron and the box together. A sealing gasket is provided on the contact surface of the apron and the box, which can ensure the sealing of the box under the pressure applied by the lock catch.

[0012] Further, each probe and the measuring hole on the apron are fixed by threads, and a sealing washer is added at the connection to also ensure the sealing of the connection.

[0013] Further, the humidity control medium can be a saturated salt solution containing undissolved solid salt particles. The principle is to use the vapor-liquid balance of water in the saturated salt solution. When the water vapor partial pressure in the fermentation chamber is lower than the equilibrium vapor pressure, the water in the saturated salt solution evaporates into the air to maintain the equilibrium vapor pressure, and the decrease of water in the solution will precipitate a part of the salt to keep the salt solution always in a saturated state. Conversely, the same principle applies.

[0014] Further, the non-porous moisture-permeable film is a kind of film that can effectively prevent other gas molecules from dissolving in the saturated salt solution and affecting the humidity control, while ensuring the accuracy and effectiveness of the measurement data.

[0015] Further, the perforated partition is made of stainless material (such as stainless steel), which divides the box into two parts, the upper part is used for placing the cigar tobacco to be fermented, and the lower part is a temporary waste liquid storage chamber, the waste liquid generated during fermentation can flow into the space through the small holes on the partition, preventing the accumulation of waste liquid and soaking the tobacco leaves.

[0016] The experimental device can maintain constant temperature and humidity conditions under closed conditions, realizes real-time online measurement of temperature and humidity and concentration of characteristic gas in the fermentation process of cigar tobacco leaves, obtains theoretical curves of gas concentration of different varieties and types of cigar tobacco leaves under different temperature and humidity conditions during the fermentation process, and thus guides the actual fermentation. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a side view of the experimental device of the utility model;

[0018] Figure 2 is an axial side schematic view of the experimental device (i.e. Figure 1 is a sectional view of 1-1 part of the experimental device).

[0019] Figure 3 is a connection schematic view of the experimental device, constant temperature water bath box and circulating pump;

[0020] In the figure: 1 constant temperature water bath box, 2 circulating pump, 3 cover plate, 4 sealing gasket, 5 measuring hole, 6 lock buckle, 7 box handle, 8 cover plate handle, 9 heat preservation layer, 10 jacket layer, 11 circulating water inlet, 12 circulating water outlet, 13 perforated partition, 14 partition handle, 15 open container, 16 support, 17 box.

[0021] Figure 3 The arrow indicates the circulating water flow direction. DETAILED DESCRIPTION

[0022] The utility model is further described below in combination with the drawings and examples:

[0023] For example, Figures 1-3As shown: the experimental device main body is a movable box structure, rectangular cuboid shape, composed of box 17 and cover plate 3. Box 17 and cover plate 3 are both designed with two layers inside and outside, and the two layers of the box contain insulation layer 9 and jacket layer 10, and the jacket layer 10 is connected with the circulating water bath system; the cover plate is between the two layers of the cover plate. The metal handle 8 on the cover plate is used to lift the cover plate after fermentation. The metal handle 7 on both sides of the box is equipped with a lock buckle 6. Two metal handles 8 are installed on the cover plate 3, and four measuring holes 5 are opened in the middle of the cover plate for placing sensor probes. The sensor will transmit the measured data to the display device. The cover plate and the box are connected with sealing gaskets 4. Two supports 16 are fixed at the bottom of the box, and a detachable perforated partition 13 is placed above to divide the box into two parts. The partition is fixed with two handles 14. A movable open container 15 is placed on the partition, and the container is wrapped with a non-porous moisture-proof film.

[0024] Further, the circulating water bath system includes a constant temperature water bath 1, a circulating pump 2 and a temperature controller, which forms a temperature monitoring and feedback system with the temperature sensor inside the box to keep the temperature in the box constant. The circulating pump delivery pipeline is wrapped with insulation material.

[0025] Further, the box handle 7 is made of alloy, which is convenient for carrying and moving the experimental device.

[0026] Further, the lock buckle 6 is installed on the upper part of the side of the box, and several lock buckles are installed on each side, which is used to fix the cover plate 3 and the box 17 together.

[0027] Further, the sealing gasket 4 is provided on the contact surface of the cover plate 3 and the box, which can ensure the sealing of the box 1 under the pressure applied by the lock buckle 6.

[0028] Further, the four measuring holes 5 on the cover plate are the placement positions of the sensor probes for measuring NH3, CO2, O2 and temperature and humidity. Each probe and the measuring hole on the cover plate are fixed by threads, and a sealing washer is added at the connection to ensure the sealing of the connection. The measurement data is transmitted to the display device in real time. In addition, the temperature sensor also transmits data to the temperature controller.

[0029] Further, the metal handle 8 on the cover plate 3 is used to lift the cover plate after fermentation.

[0030] Further, the perforated partition 13 is made of stainless steel, which divides the box into two parts. The partition is used to place the cigar tobacco to be fermented, and the lower part is a temporary waste liquid storage room. The waste liquid generated during fermentation can flow into the space through the small holes on the partition to prevent the accumulation of waste liquid and soak the tobacco, causing the tobacco to mildew and rot. The handle 14 fixed on the partition is used to facilitate the removal and cleaning of the partition after fermentation.

[0031] Further, the bracket 16 is made of stainless steel and fixed at the bottom of the box for supporting the partition 13 to prevent it from falling.

[0032] Further, the movable open container 15 is used to hold the humidity control medium such as saturated salt solution (containing undissolved salt particles) to ensure the stability of the humidity in the closed space. The principle is to use the water vapor balance in the saturated salt solution. When the water vapor partial pressure in the air is lower than the equilibrium vapor pressure, the water in the saturated salt solution evaporates into the air to maintain the equilibrium vapor pressure, and the decrease of water in the solution will precipitate a part of the salt to keep the salt solution always in the saturated state. Conversely, the same is true.

[0033] Further, since the relative humidity corresponding to the saturated salt solution changes with temperature, to obtain the specified temperature and humidity conditions, the appropriate saturated salt solution can be selected by consulting the physical chemistry manual to achieve the specified conditions.

[0034] Further, the non-porous moisture-permeable membrane is a kind of membrane that can effectively prevent other gas molecules from dissolving in the saturated salt solution and affecting the humidity control, and can also ensure the accuracy and effectiveness of the measurement data.

[0035] In a preferred embodiment, the experimental device has a length of 80 cm, a width of 40 cm, and a height of 40 cm. Two locks are installed on each side of the box to close and connect the box and the cover plate. The insulation layer is filled with insulation cotton and wrapped outside the jacket layer to reduce heat dissipation and maintain temperature stability.

[0036] In a preferred embodiment, the fermentation temperature is selected to be 40°C. First, set the target temperature to 40°C on the temperature controller. The temperature controller will start the heating / cooling device to adjust the water in the constant temperature water bath to approach the target temperature. After the water bath reaches the set temperature, the circulating pump starts to pump the heated / cooling water into the jacket layer of the box through the pipeline. The water flow in the jacket layer circulates, thereby affecting the temperature in the fermentation chamber. The temperature sensor in the closed box will monitor the internal temperature in real time and transmit the data to the temperature controller. The temperature controller will adjust the water bath temperature according to the difference between the actual temperature and the set temperature to maintain a constant temperature.

[0037] In a preferred embodiment, the fermentation temperature is selected to be 40°C and the relative humidity is selected to be 75%. The saturated sodium chloride solution is selected as the humidity control medium. 1L of saturated sodium chloride solution is prepared and excess pure sodium chloride solid particles are added to ensure that the solution contains undissolved sodium chloride particles. The container containing the saturated sodium chloride solution is sealed with a non-porous moisture-permeable membrane and placed on the perforated partition in the fermentation chamber. The saturated salt solution will automatically adjust the humidity in the fermentation chamber through the gas-liquid balance.

[0038] In another preferred embodiment, appropriate temperature and humidity sensors and gas sensors are selected, fixed at the measurement hole, and the airtightness at the measurement hole is maintained. The sensor probes in the fermentation chamber transmit the obtained measurement data in real time to a display device, and the fermentation state is monitored online. In addition, the temperature sensor also transmits data to a water bath temperature controller, and the water in the constant temperature water bath is heated / cooled to maintain the temperature in the fermentation chamber.

Claims

1. A device for detecting characteristic gas of cigar fermentation in a constant temperature and humidity closed environment, comprising a box body and a cover plate, characterized in that: The bottom plate and the wall of the box are both jacketed and provided with a thermal insulation layer, and the jacketed layer is connected with a circulating water bath system. A support is fixed on the bottom plate of the box, and a perforated partition plate for placing fermented tobacco is supported on the support. A movable open container is placed on the partition plate, and a humidity control medium is placed in the container to ensure the stability of the humidity in the closed space. The open container is wrapped with a non-porous moisture-permeable film, and the cover plate is a double-layer structure with a thermal insulation layer. Four measuring holes are formed on the cover plate, and NH3, CO2, O2, and temperature and humidity sensor probes are placed in the measuring holes.

2. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: Metal handles are arranged on both sides of the box, and cover plate handles are arranged on the cover plate.

3. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: The circulating water bath system includes a constant temperature water bath box, a circulating pump, and a temperature controller. A temperature monitoring and feedback system is formed with the temperature sensor inside the box to maintain the constant temperature in the box.

4. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: The NH3, CO2, O2, and temperature and humidity sensors transmit signals to a display device.

5. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: Partition plate handles are arranged on both sides of the perforated partition plate.

6. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: A lock catch is arranged on the upper part of the side of the box to fasten the cover plate and the box together. A sealing gasket is arranged on the contact surface of the cover plate and the box, which can ensure the sealing of the box under the pressure applied by the lock catch.

7. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: Each probe and the measuring hole on the cover plate are fixed by threads, and a sealing washer is added at the connection to ensure the sealing of the connection.

8. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: The humidity control medium includes, but is not limited to, a saturated salt solution.

9. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: The non-porous moisture-permeable film is a kind of film that can realize the permeation of water vapor molecules by utilizing the molecular structure characteristics. It can effectively prevent other gas molecules from dissolving in the saturated salt solution, which can affect the humidity control and ensure the accuracy and effectiveness of the measurement data.

10. The experimental device for detecting characteristic gas of fermented cigar in a constant temperature and humidity environment according to claim 1, characterized in that: The perforated partition plate is made of stainless material, which divides the box into two parts, the upper part is used to place the cigar tobacco to be fermented, and the lower part is a temporary waste liquid storage chamber. The waste liquid generated during fermentation can flow into the space through the small holes on the partition plate to prevent the accumulation of waste liquid and soak the tobacco.

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