Steam heating type drying oven

Abstract

The utility model discloses a steam heating type drying oven which comprises a heat preservation box body, a circulating air duct, a steam heater, a circulating fan, a heat removal fan, a temperature sensor, a steam pipeline, a steam proportion adjusting valve, a control ball valve and a drain valve. The heat preservation box body forms a drying oven main body and has good heat preservation performance; the circulating air duct is arranged in the heat preservation box body and is arranged around the inner chamber of the drying oven; the steam heater is mounted in the circulating air duct; the circulating fan is mounted on the circulating air duct and is used for driving the air source to circulate; the heat removal fan is mounted on the heat preservation box body; the temperature sensors are mounted at different positions of the inner chamber of the drying oven; the steam pipeline is connected with a steam source and a steam heater, the steam proportion adjusting valve, the control ball valve and the drain valve are arranged on the steam pipeline, and the problems that materials are heated unevenly, the equipment operation efficiency is low, and installation and maintenance are inconvenient are solved by optimizing the structural layout.

Description

TECHNICAL FIELD

[0001] The utility model relates to drying equipment technical field, concretely is steam heating formula oven. BACKGROUND

[0002] In industrial production and laboratory application, it is often required to heat and dry various materials. The existing steam heating oven as a drying equipment using steam as heat source has many unreasonable aspects in structural layout.

[0003] On the one hand, the existing oven has a poor circulating air duct design, and the trend and shape of the air duct are not optimized, resulting in uneven circulation of hot air in the oven. The hot air flow in some areas is not smooth, which causes uneven heating of the material, affects the drying and heating effect, and reduces the production efficiency and product quality. For example, in some ovens, hot air is prone to form vortex in local areas, while other areas are short of hot air supply.

[0004] On the other hand, the position of the circulating fan is not reasonable, which cannot fully play the role of driving the circulation of the air source, so that the air source cannot fully exchange heat when passing through the steam heater, and cannot effectively diffuse after entering the inner chamber of the oven, causing energy waste.

[0005] In order to solve the problem of unreasonable structure layout in the prior art, the utility model provides a steam heating oven with more scientific and reasonable structure layout to realize efficient and uniform heating of materials. SUMMARY

[0006] In view of the deficiencies in the prior art, the utility model provides a steam heating oven, which optimizes the structural layout to solve the problems of uneven material heating, low equipment operation efficiency and inconvenient installation and maintenance.

[0007] To achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The steam heating oven comprises a heat preservation box body, a circulating air duct, a steam heater, a circulating fan, an exhaust fan, a temperature sensor, a steam pipeline, a steam proportional regulating valve, a control ball valve and a drain valve. The heat preservation box body constitutes the main body of the oven and has good heat preservation performance. The circulating air duct is arranged in the heat preservation box body and surrounds the inner chamber of the oven. The steam heater is installed in the circulating air duct. The circulating fan is installed on the circulating air duct and is used to drive the circulation of the air source. The exhaust fan is installed on the heat preservation box body. The temperature sensor is installed at different positions in the inner chamber of the oven. The steam pipeline is connected with a steam source and the steam heater. The steam proportional regulating valve, the control ball valve and the drain valve are arranged on the steam pipeline.

[0009] Further preferably, it further comprises an internal anti-collision strip and a temperature control box, the internal anti-collision strip is arranged around the inner wall of the inner chamber of the oven, and the temperature control box is installed on the outer side of the heat preservation box body.

[0010] Further, the heat preservation box body adopts a multi-layer heat insulation plate structure, the inner layer is a high-temperature resistant metal plate, the middle is filled with a heat insulation material, and the outer layer is a metal protective plate, and a sealing structure is arranged around the heat preservation box body.

[0011] Further preferably, the steam heater is a heat exchanger made of corrosion-resistant copper or stainless steel.

[0012] Further preferably, the circulating fan is used to drive the air source to pass through the steam heater through the wind wheel, and then the hot air is sent out through the air duct to the inner chamber of the oven, and the used air is sucked into the air duct to be heated again.

[0013] Further preferably, the exhaust fan is used to exhaust part of the hot air in the inner chamber of the oven to adjust the temperature and air composition in the inner chamber of the oven.

[0014] The utility model has the following beneficial effects:

[0015] The steam heating type oven has the following advantages: uniform heating is improved: the optimized circulating air duct and fan layout enable the hot air to circulate more uniformly in the oven, so that each part of the material can be heated more uniformly, effectively improving the drying and heating effect, improving the product quality and production efficiency; operation efficiency is improved: the reasonable structure layout reduces the wind resistance and energy loss, the circulating fan can fully play a role, the air source is driven to circulate efficiently, the heat exchange efficiency of the steam heater and the air source is improved, and the overall equipment runs more efficiently and energy-savingly.

[0016] Convenient installation and maintenance: the compact and reasonable layout of each component reduces mutual interference, facilitates positioning and connection during installation, and enables each component to be checked, replaced and debugged more conveniently during maintenance and repair, thereby reducing maintenance cost and difficulty. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 FIG. 1 is a schematic view of the internal structure of the steam heating type oven of the utility model;

[0018] Fig. 2 FIG. 1 is a schematic view of the internal structure of the steam heating type oven of the utility model;

[0019] Fig. 3 FIG. 1 is a schematic view of the internal structure of the steam heating type oven of the utility model; DETAILED DESCRIPTION

[0020] The utility model will be further described below in connection with the drawings and related knowledge, make clear, complete description, obviously, the described application is only a part of embodiment of the utility model, not all embodiments.

[0021] The utility model will be further described below in connection with the drawings and related knowledge, make clear, complete description, obviously, the described application is only a part of embodiment of the utility model, not all embodiments.

[0022] Refer to Figs. 1-3 As shown in the figure, steam heating type oven, including heat preservation box 1, circulating air duct 2, steam heater 3, circulating fan 4, exhaust fan 5, internal anti-collision strip 6, temperature sensor 7, temperature control box 8, steam pipeline 9 and steam proportional regulating valve 10, control ball valve 11, drain valve 12.The utility model utilizes steam transmission heat to the material in the oven, realizes drying and heating purposes.Air circulation system adopts fan circulation air supply mode, and circulating air supply motor drives the wind wheel, and the air source becomes hot air through steam heater, and the hot air is sent to the oven inner chamber through the air duct, and the used air is sucked into the air duct again to be heated, to ensure the uniformity of indoor temperature.The temperature sensor in the oven transmits the temperature signal to the temperature control box, and the temperature control box controls the steam proportional regulating valve through interlocking, to realize automatic and accurate control of the temperature in the oven.

[0023] In the utility model, the temperature control of steam heating depends on the steam admission amount, and the temperature can be accurately controlled by automatically controlling the regulating valve through the temperature sensor signal.The hot air circulates in the oven, fully utilizes the heat, effectively reduces the heat loss, and saves energy.The equipment has good stability during operation, and is automatically temperature-controlled, and is convenient to install and maintain.The various materials, including wooden products, textiles, paper, medicinal materials, food, EPP and chemical raw materials, can be dried, and the utility model is an ideal universal drying equipment.The design of the heat preservation layer ensures the heat preservation of the oven, reduces the risk of users contacting the high-temperature surface, and ensures the use safety.

[0024] Further preferably, the heat preservation box 1 is made of a material with good heat preservation performance, such as a multi-layer heat insulation plate structure, an inner layer of high-temperature resistant metal plate, an intermediate layer of heat insulation material (such as rock wool, polyurethane foam, etc.), and an outer layer of metal protective plate, which reduces heat loss, maintains the stability of the internal temperature of the oven, and protects the operator from contacting high temperature.The size of the heat preservation box is designed according to the actual use requirement, and a sealing structure is arranged around the heat preservation box to ensure the sealing of the box body.Further, the heat preservation box 1 is provided with an oven sealing door 14.

[0025] The circulating air duct 2 is arranged in the heat preservation box and surrounds the oven inner chamber.The shape and direction of the circulating air duct are optimized to ensure that the hot air can circulate uniformly in the oven.The inner wall of the circulating air duct is smooth to reduce air resistance and improve the efficiency of hot air circulation.One end of the circulating air duct is connected with the steam heater, and the other end is communicated with the oven inner chamber to form a hot air circulation channel.

[0026] Steam heater 3: installed in the circulating air duct, made of corrosion-resistant copper or stainless steel material heat exchanger. Steam enters the steam heater through the steam pipeline, exchanges heat with the air in the air duct, and heats the air. The heat exchange area and structural design of the steam heater are determined according to the heating power requirement of the oven to ensure efficient heat transfer of steam to air.

[0027] Circulating fan 4: installed at a suitable position in the circulating air duct, usually near the steam heater. The function of the circulating fan is to provide power for air circulation, drive the air source through the steam heater, and send hot air out through the air duct to the oven chamber. The used air is sucked into the air duct to become the air source again to be heated and used. The power of the circulating fan is selected according to the volume of the oven, air duct resistance and other factors to ensure efficient hot air circulation and ensure uniformity of the oven temperature.

[0028] Exhaust fan 5: installed at a suitable position on the top or side of the insulation box, used to exhaust part of the hot air in the oven, adjust the temperature and air composition in the oven. When the temperature in the oven is too high or needs to be replaced, the exhaust fan starts to exhaust part of the hot air, while fresh air from outside can enter the oven through a suitable air inlet to maintain air balance in the oven.

[0029] Internal anti-collision strip 6: set around the inner wall of the oven chamber, made of elastic materials such as rubber or plastic. Its function is to prevent the material from colliding and damaging the inner wall of the oven during transportation or placement, and also to protect the material from damage to a certain extent.

[0030] Temperature sensor 7: installed at different positions in the oven chamber, at least two or more to monitor the temperature of different areas in the oven. The temperature sensor uses high-precision thermal resistance or thermocouple elements that can accurately sense temperature changes and transmit temperature signals in real time to the temperature control box.

[0031] Temperature control box 8: usually installed on the outside of the insulation box for easy operation and maintenance. The temperature control box integrates control circuit, display module, etc. inside. It is interlocked with the temperature sensor and the steam proportional control valve, receives the temperature signal from the temperature sensor, compares it with the set temperature, and adjusts the opening of the steam proportional control valve through the control circuit according to the difference, to realize automatic and accurate control of the oven temperature.

[0032] Steam pipe 9 and steam proportional regulating valve 10, control ball valve 11, drain valve 12: steam pipe adopts pressure-resistant and high-temperature-resistant metal pipe to connect steam source 13 and steam heater 3. Steam proportional regulating valve 10 is installed on the steam pipe, close to the inlet of steam heater 3, and adjusts the steam inlet amount according to the instruction of temperature control box, so as to control the heating power of steam heater. Control ball valve 11 is used to cut off the steam supply in equipment maintenance, overhaul or emergency. Drain valve 12 is installed at the low point of steam pipe or the outlet of steam heater, which functions to remove the condensed water in steam pipe and steam heater, and ensures the dryness of steam and the heating efficiency.

[0033] Working principle: starting stage: turn on the power supply of the equipment, open the control ball valve, and the steam of the steam source enters the system through the steam pipe. The temperature control box is initialized, and the operator sets the required oven temperature value on the temperature control box.

[0034] Heating stage: the circulating fan starts to drive the air source to flow in the circulating air duct. Steam enters the steam heater through the steam pipe, and in the steam heater, steam exchanges heat with the air in the air duct to heat the air into hot air. The hot air enters the oven chamber through the circulating air duct to heat the materials in the oven. As the heating process proceeds, the temperature in the oven gradually rises.

[0035] Temperature control stage: the temperature sensor monitors the temperature at different positions in the oven in real time and transmits the temperature signal to the temperature control box. The temperature control box compares the received actual temperature with the set temperature. When the actual temperature is lower than the set temperature, the temperature control box issues an instruction to increase the opening of the steam proportional regulating valve, increase the steam inlet amount, and thus increase the heating power of the steam heater, so as to increase the temperature of the hot air and then increase the temperature in the oven. When the actual temperature is higher than the set temperature, the temperature control box issues an instruction to reduce the opening of the steam proportional regulating valve, reduce the steam inlet amount, and thus reduce the heating power of the steam heater, so as to reduce the temperature of the hot air and then reduce the temperature in the oven. Through this closed-loop control mode, automatic and accurate control of the temperature in the oven is realized.

[0036] Hot air circulation stage: during the heating and temperature control process, the circulating fan continuously works to make the hot air circulate between the oven chamber and the circulating air duct. The used air is sucked into the air duct and then sent back to the oven chamber after being heated by the steam heater again, so as to ensure the uniformity of the temperature in the oven and improve the thermal efficiency.

[0037] Heat exhaust stage: when the temperature in the oven is too high or the air needs to be replaced, the exhaust fan starts to exhaust part of the hot air. At the same time, fresh air from outside can enter the oven through the air inlet provided on the heat preservation box, so as to maintain the air balance and temperature stability in the oven.

[0038] End stage: when the material is dried or heated, close the control ball valve, cut off the steam supply. Circulating fan and exhaust fan continue to run for a period of time, the heat in the oven is discharged, and when the temperature in the oven is reduced to a safe range, the circulating fan and exhaust fan are turned off, and the equipment stops running.

[0039] In the utility model, circulating air duct 2 is arranged in heat preservation box body 1, adopts the reasonable layout of surrounding the inner chamber of oven, its shape and trend are carefully designed, ensure that hot air can uniformly circulate in the oven. The inner wall of the air duct is smooth, effectively reduces the air resistance, and improves the hot air circulation efficiency.

[0040] Fan layout: circulating fan 4 is installed at the optimal position of circulating air duct close to steam heater, is accurately selected according to the volume of oven, air duct resistance and other factors, can efficiently drive the air source via steam heater, uniformly sends hot air to the inner chamber of oven, and makes the used air smoothly inhale into the air duct and is heated again. Exhaust fan 5 is installed at the appropriate position on heat preservation box body, can accurately adjust the air composition and temperature balance in the oven.

[0041] Internal anti-collision strip 6 is reasonably arranged around the inner wall of the inner chamber of the oven, temperature sensor 7 is distributed at the key position of the inner chamber of the oven to accurately monitor the temperature, temperature control box 8 is installed on the outer side of the heat preservation box body for convenient operation and maintenance, and steam pipeline and related valves are arranged according to the principle of fluid mechanics and operation convenience.

[0042] In the utility model, the optimized circulating air duct and fan layout make the hot air more uniformly circulate in the oven, and each part of the material can be more uniformly heated, effectively improving the drying and heating effect, improving the product quality and production efficiency. The reasonable structure layout reduces the air resistance and energy loss, the circulating fan can fully play a role, drives the air source to circulate efficiently, the heat exchange efficiency of steam heater and air source is improved, and the whole equipment runs more efficiently and energy-saving. The layout of each component is compact and reasonable, reduces mutual interference, is convenient for positioning and connection in the installation process, and in the maintenance and repair, each component can be more conveniently checked, replaced and debugged, thereby reducing the maintenance cost and difficulty.

[0043] Although some embodiments of the utility model have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and all should belong to the scope of the utility model.

Claims

1. A steam-heated drying oven, characterized in that, The oven includes an insulated box, a circulating air duct, a steam heater, a circulating fan, a heat exhaust fan, a temperature sensor, a steam pipe, a steam proportional control valve, a control ball valve, and a drain valve. The insulated box constitutes the main body of the oven. The circulating air duct is located inside the insulated box and is arranged around the inner chamber of the oven. The steam heater is installed inside the circulating air duct. The circulating fan is installed on the circulating air duct to drive the air source circulation. The heat exhaust fan is installed on the insulated box. The temperature sensor is installed at different positions inside the oven. The steam pipe connects the steam source and the steam heater, and the steam proportional control valve, control ball valve, and drain valve are located on the steam pipe.

2. The steam-heated drying oven according to claim 1, characterized in that, It also includes internal anti-collision strips and a temperature control box. The internal anti-collision strips are installed around the inner wall of the oven chamber, and the temperature control box is installed on the outer side of the insulated box.

3. The steam-heated drying oven according to claim 2, characterized in that, The insulated box adopts a multi-layer heat insulation board structure, with an inner layer of high-temperature resistant metal plate, a middle layer of heat insulation material, an outer layer of metal protective plate, and a sealing structure around the perimeter.

4. The steam-heated drying oven according to claim 1, characterized in that, The steam heater uses a heat exchanger made of corrosion-resistant copper or stainless steel.

5. The steam-heated drying oven according to claim 1, characterized in that, The circulating fan is used to drive the air source from the impeller through the steam heater, send out hot air, and then send it through the air duct to the inner chamber of the oven. The used air is then drawn into the air duct for recirculation and heating.

6. The steam-heated drying oven according to claim 1, characterized in that, The exhaust fan is used to expel some of the hot air from inside the oven and to regulate the temperature and air composition inside the oven.

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