Baking type dryer

Abstract

According to the baking type drying machine, on the basis of a traditional box type drying machine, the drying box body is provided with the multiple independent drying chambers, the heat source is arranged below each drying chamber, heat energy is directly guided into the drying chambers, and a unified cabin type hot air circulation material drying method is changed into unit baking type drying; the temperature distribution state, the heat energy supply intensity, the material heating state and the air flowing state in the drying oven body are changed, and the damp and hot air discharging effect is improved. The intelligent temperature and humidity management system is arranged in the dryer, single-point temperature and humidity management is carried out in the drying chamber through the CPU, and the working efficiency of the dryer is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of box-type drying machine, in particular to a baking drying machine. BACKGROUND

[0002] The box-type drying machine is commonly used in the dehydration of various food, agricultural products and some industrial raw materials due to its simple structure, easy operation and relatively low cost. The existing box-type drying machine basically adopts hot air circulation dehydration drying. The hot air transports heat to the surface of the object to be dehydrated, realizes heat exchange between the hot air molecules and the object to be processed, increases the temperature of the water molecules in the object to be processed, promotes the evaporation of the water molecules, and realizes the dehydration drying of the object to be processed.

[0003] The principle of hot air drying is that the hot air transmits heat to the water molecules in the material to be dehydrated, realizes heat transfer between the gas molecules and the water molecules through the collision between the hot gas molecules and the water molecules, increases the temperature of the water molecules, promotes the evaporation of the water molecules, and realizes the drying purpose of the product. However, due to the low density of gas molecules in the air, and with the increase of the temperature of the gas, the density of the gas molecules further decreases, and the heat transfer efficiency of the hot air molecules in a unit volume is also low. Therefore, the equipment for drying by using hot air drying often needs a long time to complete the dehydration drying of some agricultural products, and the energy utilization efficiency is very low. SUMMARY

[0004] In view of the problems in the prior art, the present application provides a baking drying machine. The technical scheme adopted by the present application to solve the technical problem is:

[0005] A baking drying machine, the structure of which comprises an oven body, an electric heat source arranged in the oven body, a control unit and an exhaust system. The oven body is provided with multiple layers of drying chambers along the height direction thereof. Air vents are arranged on the two side walls of the drying chambers. The bottom plate of the drying chamber is a drying plate. The electric heat source is installed at the lower part of the drying plate. A gap is arranged between the two sides of the drying chamber and the side wall of the oven body as an air duct. An exhaust fan is installed at one side of the oven body as an air inlet duct. An exhaust window is arranged at the other side of the oven body as an air outlet duct. The exhaust system is composed of the air vents, the exhaust window, the air duct and the exhaust fan. The exhaust fan is installed at the port of the air duct on one side of the oven body. The exhaust window is arranged on the other side of the oven body. Temperature and humidity sensors are arranged on the upper side wall of the drying chamber.

[0006] Preferably, a hinged door is arranged at one end of the front of the oven body, and the hinged door is provided with an observation window.

[0007] Preferably, one side of the front of the oven body is fixedly provided with a base plate, the front of the base plate is provided with a display screen, the bottom of the base plate is fixedly installed with a controller, and the electric heating source, the temperature sensor, the humidity sensor, the exhaust fan and the display screen are electrically connected with the controller.

[0008] Preferably, one end of the front of the base plate is fixedly installed with a switch, and the controller is electrically connected with the external power supply through the switch.

[0009] Preferably, the electric heating source is composed of linear electric heating wires embedded in the fin plate and is integrated with the bottom of the drying disc through the fin plate.

[0010] Preferably, the control unit comprises a single-chip processor, a time control module, a temperature and humidity signal detection module, a signal processing module, an audible and light alarm module, a power supply module and a man-machine interface module, the signal detection module is connected with the temperature sensor and the humidity sensor, the signal detection module transmits signals to the signal processing module, the signal processing module transmits signals to the single-chip processor, and the single-chip processor is connected with the power supply module, the time control module, the audible and light alarm module and the man-machine interface module.

[0011] The baking type drying machine provided by the application is based on the traditional box type drying machine, the oven body is provided with a plurality of independent drying chambers, a heat source is arranged below each drying chamber, the heat energy is directly introduced into the drying chamber, the heat energy density of the drying work interface is greatly increased, a heat dissipation air duct is arranged in the independent drying chamber, the method of material drying by the unified cabin type hot air circulation is changed into the unit baking type drying, the temperature distribution state, the heat energy supply intensity, the material heating state and the air flow state in the oven body are changed, the wet hot air discharge effect is improved, and the working efficiency of the drying machine is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 Fig. 1 is a structural schematic view of the baking type drying machine of the application;

[0013] Figure 2 Fig. 2 is a perspective schematic view of the appearance of the baking type drying machine;

[0014] Figure 3 Fig. 3 is a schematic view of the internal structure of the electric heating source;

[0015] Figure 4 Fig. 4 is a schematic view of the exhaust window structure of the baking type drying machine;

[0016] Figure 5 Fig. 5 is a hardware block diagram of the control unit of the baking type drying machine.

[0017] In the figure: 1, oven body; 2, drying chamber; 3, door; 4, bottom tray; 5, exhaust fan; 6, control unit; 7, temperature sensor; 8, humidity sensor; 9, ventilation window; 10, fin plate; 11, electric heat source; 12, exhaust window. DETAILED DESCRIPTION

[0018] In the following, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0019] Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0020] Please refer to Figures 1-5 The present application provides a kind of baking dryer, its structure includes oven body 1, electric heat source 11 being arranged in oven body 1, control unit 6 and exhaust system. Six layers of drying chamber 2 are arranged in the height direction of oven body 1 in oven body 1, ventilation window is arranged on the two side walls of drying chamber 2, and the bottom tray 4 of drying chamber 2 is drying tray, and electric heat source 11 is installed in the lower part of drying tray. Gap is arranged between the two sides of drying chamber 2 and the side wall of oven body 1 as air duct, one side is installed exhaust fan 5, as air inlet duct, the other side is provided with exhaust window 12, as air outlet duct. Exhaust system is composed of ventilation window 9, exhaust window 12, air inlet and outlet duct and exhaust fan 5, exhaust fan 5 is installed at the port of air inlet duct on one side of oven body 1, and exhaust window 12 is arranged on the other side of oven body 1. Temperature sensor 7 and humidity sensor 8 are arranged on the upper side wall of drying chamber 2.

[0021] One end of the front of oven body 1 is hinged with opening and closing door 3, and the opening and closing door 3 can be a glass door 3, so that the operator can directly observe the working condition of the inside of the dryer during use through the glass door 3.

[0022] The base plate is fixedly arranged on one side of the front of oven body 1, a display screen is arranged on the front of the base plate, a controller is fixedly installed at the bottom of the base plate, and the electric heat source 11, temperature sensor 7, humidity sensor 8, exhaust fan 5 and display screen are electrically connected with the controller.

[0023] A switch is fixedly installed on one end of the front of the base plate, and the controller is electrically connected with the external power supply through the switch.

[0024] The silicon gel carbon fiber heating wire is used as the electric heating source 11, the silicon gel carbon fiber heating wire is embedded in the fin plate 10, and the fin plate 10 is combined with the bottom of the drying disc to form an integrated body, the heat energy generated by the silicon gel carbon fiber heating wire can be efficiently and uniformly transmitted through the aluminum alloy fin plate 10 to generate upward heat radiation on the bottom plate of the drying chamber 2, and the fin plate 10 is used to increase the heat dissipation surface and improve the heat efficiency.

[0025] The control unit 6 selects a programmable logic controller PLC (SLC5 / 03 type), and integrates the time control unit 6, the multi-channel temperature and humidity signal acquisition unit, the signal amplifier, the keyboard display unit, the power supply module, and the man-machine interface module.

[0026] The SLC5 / 03 type PLC used by the system is composed of a frame 1745-A7, a power module 1746-2, a CPU module 1747-L532, a switching value input module 1745-IB16, an analog value input module 1746-NI4, a TTL level output module 1746-0G16, and a switching value output module 1746-0W16. It is mainly responsible for the collection of temperature and humidity measurement point signals, data processing, output display information, and control signals.

[0027] The multi-channel temperature acquisition unit is composed of a precision voltage power supply circuit, a temperature and humidity measurement, and a temperature sensor 7 signal and a humidity sensor 8 signal of each measurement point are converted into voltage signals.

[0028] A same-phase parallel differential amplifier capable of suppressing common-mode multiplication is composed of an integrated operational amplifier LM124 and peripheral elements. The amplification multiple of the amplifier can be adjusted within a certain range, so as to amplify the voltage signal sent by the multi-channel temperature acquisition unit to a certain amplitude, so as to meet the level requirement of the analog input module of the PLC.

[0029] The keyboard display unit is composed of a 3-8 decoder 74HC138, an 8D flip-flop 74HC273, a Darlington driver MC1413, a digital tube driver MC14495, and an LED digital tube, etc. It is mainly used for information display and receiving control commands.

[0030] The control value range of the temperature sensor 7 and the humidity sensor 8 is input to the PLC by the man-machine interface module.

[0031] When the dryer is working, the temperature control range and the humidity control range in the drying chamber 2 can be preset according to the dehydration process requirement of the dried goods. After the dryer is started, the temperature sensor 7 can detect that the temperature in the drying chamber 2 is lower than the preset temperature range, the temperature and humidity controller starts the electric heating source 11, and when the temperature in the box is higher than the preset temperature range, the exhaust fan 5 is started at the same time. When the humidity in the box is lower than the preset humidity range, the exhaust fan 5 is turned off, so that the dried goods enter the roasting process.

Claims

1. A baking dryer, which is structured to include a baking body, an electric heat source provided to the baking body, a control unit, and an exhaust system, wherein The oven body is provided with multiple drying chambers along its height direction, air vents are arranged on the two side walls of the drying chambers, the bottom plate of the drying chamber is a drying plate, and the electric heating source is installed at the lower part of the drying plate; gaps are arranged between the two sides of the drying chamber and the side walls of the oven body as air ducts, one side is provided with an exhaust fan as an air inlet duct, and the other side is provided with an exhaust window as an air outlet duct; the exhaust system is composed of the air vents, the exhaust window, the air ducts and the exhaust fan, the exhaust fan is installed at the port of the air duct on one side of the oven body, and the exhaust window is arranged on the other side of the oven body; temperature sensors and humidity sensors are arranged on the upper side walls of the drying chambers.

2. A bake dryer as claimed in claim 1, characterised in that: One end of the front side of the oven body is hingedly connected with an opening and closing door, and the opening and closing door is provided with an observation window.

3. A bake dryer as claimed in claim 1, wherein: One side of the front side of the oven body is fixedly provided with a base plate, the front side of the base plate is provided with a display screen, the bottom of the base plate is fixedly installed with a controller, and the electric heating source, the temperature sensors, the humidity sensors, the exhaust fan and the display screen are electrically connected with the controller.

4. A bake dryer as claimed in claim 1, wherein: The electric heating source is composed of linear electric heating wires embedded in the fin plate, and the fin plate is combined with the bottom of the drying plate.

5. A bake dryer as claimed in claim 1, wherein: The control unit comprises a single-chip processor, a time control module, a temperature and humidity signal detection module, a signal processing module, an audible and visual alarm module, a power supply module and a man-machine interface module, the signal detection module is connected with the temperature sensors and the humidity sensors, the signal detection module transmits signals to the signal processing module, the signal processing module transmits signals to the single-chip processor, and the single-chip processor is connected with the power supply module, the time control module, the audible and visual alarm module and the man-machine interface module.

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