Exhaust system for edible mushroom discharge buffer room

Abstract

The utility model discloses an edible fungus buffer interval's exhaust system of taking out of furnace, including exhaust hood, frequency conversion exhaust fan, exhaust pipe, pressure difference sensor and control cabinet, exhaust pipe whole is from the air inlet end to the air outlet end downwardly inclined setting, and the air outlet end of exhaust pipe is equipped with check valve, pressure difference sensor is used for real -time monitoring the atmospheric pressure difference of buffer interval chamber outside, and control cabinet is used for the dynamic control frequency conversion exhaust fan based on the signal from pressure difference sensor. The above -mentioned scheme can realize intelligent regulation and control, prevent dew, corrosion -resistant and efficient exhaust.

Description

Technical Field

[0001] This utility model relates to the field of industrialized production technology of edible fungi, and in particular to an exhaust system for a buffer room for edible fungi after they are removed from the oven. Background Technology

[0002] In the industrialized production of edible fungi, the buffer zone after the sterilization of the mushroom bags is a crucial transition area used to temporarily store the bags that have just been taken out of the sterilizer. During this process, the sterilizer outlet releases a large amount of high-temperature and high-humidity steam. If this steam cannot be effectively and promptly discharged, it can easily lead to a sudden increase in humidity and air pressure in the buffer zone, which in turn can cause contaminants such as bacteria, spores, and dust to accumulate or even flow back into the container, significantly increasing the risk of contamination of the mushroom bags.

[0003] Currently, most edible mushroom factories use fixed-power fans in conjunction with simple ducts or overhead exhaust fans for ventilation. This system has the following prominent problems:

[0004] 1. Unreasonable airflow organization and low exhaust efficiency can easily create dead air zones, leading to the accumulation of pollutants;

[0005] 2. Condensation is easily generated in high humidity environments, and water accumulation in the pipes breeds mold, making cleaning and maintenance difficult;

[0006] 3. The fan runs continuously at full speed without intelligent control, resulting in high energy consumption and an inability to adapt to real-time air pressure changes;

[0007] 4. The equipment material is not corrosion resistant. Ordinary metals or plastics are prone to aging in long-term high humidity environments, resulting in a short lifespan. Utility Model Content

[0008] To address the aforementioned problems, the purpose of this invention is to provide an exhaust system for the buffer room where edible fungi are removed from the oven, which can achieve intelligent control, prevent condensation, resist corrosion, and provide efficient exhaust.

[0009] The exhaust system of the mushroom drying buffer room includes:

[0010] An exhaust hood is installed at the exhaust port at the top of the furnace buffer chamber, and the exhaust hood has gas collection holes on its side;

[0011] The variable frequency exhaust fan has its air inlet connected to the air collection hole of the exhaust hood, and its outlet connected to the air inlet end of the exhaust pipe.

[0012] The exhaust pipe is designed to slope downwards from the intake end to the outlet end, and a check valve is provided at the outlet end of the exhaust pipe.

[0013] Several differential pressure sensors are used to monitor the pressure difference between the inside and outside of the furnace outlet buffer room in real time;

[0014] The control cabinet is connected to the differential pressure sensor and the variable frequency exhaust fan, and is used to dynamically control the variable frequency exhaust fan based on the signal from the differential pressure sensor.

[0015] In this system, the exhaust hood is installed at the top of the buffer room for efficient gas collection; the exhaust pipe is used to transport high-temperature exhaust gas; and through the closed-loop linkage between the differential pressure sensor and the variable frequency exhaust fan, the exhaust can be automatically started and the exhaust intensity can be adjusted, which can significantly reduce energy consumption; at the same time, the inclined pipe and check valve design work together to effectively prevent backflow of exhaust gas and accumulation of condensate, solving the problems of unreasonable airflow organization, energy waste and high pollution risk in the existing technology from both structural and control dimensions.

[0016] As a preferred option, the exhaust pipe is covered with an insulation layer. The insulation layer effectively isolates the high-temperature exhaust gas inside the pipe from the heat exchange with the cold outside air, significantly reducing the generation of condensate on the inner wall of the pipe.

[0017] Preferably, after installing a check valve at the outlet end of the exhaust pipe, a bend is connected to the outlet facing the ground. The bend creates directional exhaust towards the ground, effectively preventing airflow disturbance.

[0018] Preferably, the check valve is a gravity flap check valve. Using a gravity flap check valve, it automatically opens using airflow when the exhaust fan is running, and quickly closes due to the weight of the valve plate when the fan stops, achieving a reliable, purely mechanical seal.

[0019] Preferably, the exhaust hood, variable frequency exhaust fan, and exhaust pipe are all made of stainless steel. The use of stainless steel for the core components of the system improves its corrosion resistance and aging resistance in long-term high humidity, high temperature, and acidic environments, thus extending its service life.

[0020] Preferably, at least two differential pressure sensors are included, installed at opposite corners of the furnace outlet buffer chamber; the control cabinet dynamically controls the variable frequency exhaust fan based on the average value of all differential pressure sensors. By arranging the dual sensors diagonally and taking the average value for control, the measurement error of a single sensor can be reduced, and the control accuracy can be improved.

[0021] Preferably, the overall tilt angle of the exhaust pipe should be no less than 2°. Ensure that the pipe has sufficient slope so that the cold energy can flow smoothly to the lowest point and be discharged outdoors.

[0022] Preferably, the control cabinet includes a human-machine interface, allowing operators to intuitively set and view control parameters and real-time operating status, facilitating management.

[0023] Preferably, the inner surface of the exhaust hood is polished. This effectively prevents spores from adhering and avoids blockage. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this application;

[0025] Figure 2 for Figure 1 Enlarged view of the central exhaust system.

[0026] Figure label:

[0027] 1. Exhaust hood, 2. Variable frequency exhaust fan, 3. Exhaust pipe, 4. Check valve, 5. Differential pressure sensor, 6. Control cabinet. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below.

[0029] like Figures 1-2 As shown, this embodiment relates to an exhaust system for a mushroom spawning buffer room. The spawning buffer room is located at the outlet of the sterilizer, and the exhaust system is located on top of the spawning buffer room. It includes an exhaust hood 1, a variable frequency exhaust fan 2, an exhaust pipe 3, a check valve 4, several differential pressure sensors 5, and a control cabinet 6. The core components of the exhaust system—the exhaust hood 1, the variable frequency exhaust fan 2, the exhaust pipe 3, and the check valve 4—are all made of stainless steel to extend their corrosion resistance in high humidity, high temperature, and acidic environments.

[0030] An exhaust hood 1 is installed at the exhaust port at the top of the furnace outlet buffer chamber to collect the high-temperature and high-humidity exhaust gas discharged from the furnace outlet buffer chamber. The exhaust hood 1 serves as a highly efficient gas collection device. In a preferred embodiment, at least the inner surface of the exhaust hood 1 is surface polished to prevent spore adhesion.

[0031] The exhaust hood 1 has a gas collection hole on its side. The air inlet of the variable frequency exhaust fan 2 is connected to the gas collection hole of the exhaust hood 1, and its outlet is connected to the air inlet of the exhaust pipe 3. The exhaust gas is discharged from the exhaust hood 1 by forced directional exhaust through the variable frequency exhaust fan 2.

[0032] The variable frequency exhaust fan 2 is controlled by the control cabinet 6. It operates according to the air pressure in the furnace buffer room. Specifically, in this embodiment, the air pressure in the furnace buffer room is determined by the pressure difference sensor 5 monitoring the air pressure difference inside and outside the furnace buffer room in real time. Based on the air pressure difference, the control cabinet 6 links the variable frequency exhaust fan 2 to automatically adjust the exhaust intensity, realize unmanned intelligent operation, avoid insufficient exhaust or overload, and save energy.

[0033] In a preferred embodiment, at least two differential pressure sensors 5 are included, respectively installed at opposite corners of the furnace outlet buffer chamber; the control cabinet 6 dynamically controls the variable frequency exhaust fan 2 based on the average value of all differential pressure sensors 5. By installing two sets of differential pressure sensors 5 diagonally on the walls of the buffer chamber and using the average value for control, local measurement errors can be eliminated, and control accuracy can be improved.

[0034] The exhaust pipe 3 is sloped downwards from the inlet to the outlet, and a check valve 4 is provided at the outlet. In this embodiment, the exhaust pipe 3 maintains a slope of ≥2% throughout, and condensate at the lowest point is discharged outdoors. In a preferred embodiment, the exhaust pipe 3 is covered with an insulation layer. Specifically, the insulation layer can be a 40mm centrifugal glass wool insulation layer. The insulation layer can effectively isolate the heat exchange between the high-temperature exhaust gas inside the pipe and the cold outside air, significantly reducing the generation of condensate on the inner wall of the pipe.

[0035] In this embodiment, a check valve 4 is provided. The check valve 4 is normally closed to prevent backflow of exhaust gas. The check valve 4 in this embodiment is a gravity flap check valve, also known as a gravity check valve. It automatically opens using wind power when the variable frequency exhaust fan 2 is working, and closes by its own weight when the machine stops, achieving a reliable mechanical seal.

[0036] As shown in Figure 1, the exhaust pipe 3 has a 30° downward bend (other downward bends can be selected in other embodiments) at the rear of the check valve 4 at the end of the pipe, which directs the exhaust towards the ground to avoid airflow disturbance.

[0037] Control cabinet 6 is connected to differential pressure sensor 5 and variable frequency exhaust fan 2. Control cabinet 6 integrates controller and human-machine interface, which allows operators to intuitively set and view control parameters and real-time working status, making it easy to manage.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The exhaust system of the buffer room for edible fungi unloading, characterized in that, include: An exhaust hood is installed at the exhaust port at the top of the furnace buffer chamber, and the exhaust hood has gas collection holes on its side; The variable frequency exhaust fan has its air inlet connected to the air collection hole of the exhaust hood, and its outlet connected to the air inlet end of the exhaust pipe. The exhaust pipe is designed to slope downwards from the intake end to the outlet end, and a check valve is provided at the outlet end of the exhaust pipe. Several differential pressure sensors are used to monitor the pressure difference between the inside and outside of the furnace outlet buffer room in real time; The control cabinet is connected to the differential pressure sensor and the variable frequency exhaust fan, and is used to dynamically control the variable frequency exhaust fan based on the signal from the differential pressure sensor.

2. The exhaust system of the edible fungus unloading buffer room according to claim 1, characterized in that, The exhaust pipe is covered with an insulation layer.

3. The exhaust system of the edible mushroom unloading buffer room according to claim 1, characterized in that, After installing a check valve at the outlet end of the exhaust pipe, connect a bend with the outlet facing the ground.

4. The exhaust system of the edible fungus unloading buffer room according to claim 1, characterized in that, The check valve is a gravity flap check valve.

5. The exhaust system of the edible fungus unloading buffer room according to claim 1, characterized in that, The exhaust hood, variable frequency exhaust fan, and exhaust pipe are all made of stainless steel.

6. The exhaust system of the edible fungus unloading buffer room according to claim 1, characterized in that, It includes at least two differential pressure sensors, which are installed at opposite corners of the furnace outlet buffer room; the control cabinet dynamically controls the variable frequency exhaust fan based on the average value of all differential pressure sensors.

7. The exhaust system of the edible fungus unloading buffer room according to claim 1, characterized in that, The overall tilt angle of the exhaust pipe is not less than 2°.

8. The exhaust system of the edible fungus unloading buffer room according to claim 1, characterized in that, The control cabinet includes a human-machine interface.

9. The exhaust system of the edible mushroom unloading buffer room according to claim 1, characterized in that, The inner surface of the exhaust hood is polished.

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