Title
[0001] Air Supply and Exhaust System for Tunnel-type Sterilizing Dryer
Field of Invention
[0002] The present invention relates to a machinery for packaging which is used in food and pharmaceutical industries, and more particularly to an air supply and exhaust system for a tunnel-type sterilizing dryer.
Description of Related Arts
[0003] Sterilizing dryer is widely used in the field of food and pharmaceutical machinery. The fresh air used in the preheating section and cooling section of the sterilizing dryer are usually collected from where the dryer located. A large collection of the indoor air in the preheating section and cooling section affects the indoor pressure difference and laminar flow effect. Then, the working pressure of indoor air-conditioning system is increased. The cooling effect in cooling section is influenced by the changes of indoor temperature. In addition, the unclean air will fall back toward the tunnel-type oven due to the lack of backflow prevention in preheating section and cooling section. Hidden risks exist in the sterilizing Dryer.
Summary of the Present Invention
[0004] Accordingly, it is an object of the present invention to solve the technical problem of a sterilizing dryer and to provide an air supply and exhausts system for a tunnel-type sterilizing dryer that improves the stability and controllability of indoor pressure difference and laminar flow effect, is safe and reliable to use, and avoids backflow contamination, thus improving operation environment and reducing production cost.
[0005] To achieve these and other objects, there is provided an apparatus for a tunnel-type sterilizing dryer as follows: 2
[0006] An air supply and exhaust system for a tunnel-type sterilizing dryer comprises an indoor oven assembly, a quantitative air supply assembly and a quantitative air exhaust assembly communicating with the oven assembly; the air inlet of the quantitative air supply assembly is disposed outdoors.
[0007] The present invention is further improved with the following features:
[0008] The quantitative air supply assembly comprises an outdoor inlet air-conditioning unit, an inlet duct communicating with the inlet air-conditioning components and indoor oven assembly; the air inlet is located on inlet air-conditioning components.
[0009] The inlet duct comprises two or more air supply outlets.
[0010] The quantitative air exhaust assembly comprises a backflow prevention assembly.
[0011] The backflow prevention assembly is a medium efficiency filter or a high efficiency particulate air (HEPA) filter.
[0012] The quantitative air exhaust assembly comprises an outdoor exhaust outlet box, an exhaust outlet pipe communicating with the exhaust outlet box and the oven assembly.
[0013] The exhaust outlet pipe comprises two or more air inlets communicating with the oven assembly.
[0014] The medium efficiency filter or high efficiency particulate air (HEPA) filter is located in the exhaust outlet box.
[0015] The exhaust outlet box comprises a fan.
[0016] Compared to conventional technologies, the advantages effect of the present invention is as follows:
[0017] The present invention comprises a quantitative air supply assembly, which can supply the air steadily and adjust the quantity of supply air in the preheating section and cooling section, and a quantitative air exhaust assembly, which can exhaust the air and adjust the quantity of exhaust air in the preheating section and cooling section, communicating with the oven assembly. The outdoor quantitative air supply assembly can easily maintain stability of the indoor pressure difference and laminar flow effect. As a result, the stability and controllability of indoor pressure difference and the laminar flow effect guaranteed, conforming to the new edition of GMP. 3
[0018] The present invention, by providing an outdoor inlet air-conditioning unit located on the quantitative air exhaust assembly, can further reduce the interference with the indoor environment, and is more beneficial to maintain the indoor pressure difference and the stability of laminar.
[0019] The present invention, by providing a backflow prevention assembly located on the quantitative air exhaust assembly, can prevent the unclean air from into the oven when it stops and avoid pollutants contaminating the inside operation environment of oven, conforming to the new edition GMP.
[0020] The present invention, by providing a fan located on the quantitative air exhaust assembly, can reduce the usage of exhaust fan in cooling section and maintain the indoor pressure difference effectively. Furthermore, the present invention can reduce the noise of indoor operation environment to keep the operator healthy.
Brief Description of the Drawing
[0021] Fig.1 shows a front view, in cross section, of an air supply and exhaust system for a tunnel-type sterilizing dryer according to the present invention.
[0022] Fig.2 shows a side view, in cross section, of an air supply and exhaust system for a tunnel-type sterilizing dryer according to the present invention.
[0023] Number of elements in the drawings is as following.
[0024] oven assembly; 11- first air inlet; 12- second air inlet; 13- first air exhaust outlet; 14- second air exhaust outlet; 2- quantitative air supply assembly; 21- inlet air-conditioning unit; 22- inlet duct; 23- preheating inlet duct; 24- cooling inlet duct;3- quantitative air exhaust assembly; 31- exhaust outlet box; 32- exhaust outlet pipe; 33- sterilizing dry exhaust outlet pipe; 34- cooling exhaust outlet pipe; 4- backflow prevention assembly; 5- clapboard.
Detailed Description of the Preferred Embodiment
[0025] The air supply and exhaust system for a tunnel-type sterilizing dryer is further described with the accompanying drawings and illustrative examples as follows.
[0026] The first preferred embodiment, as shown in Fig.1 and Fig.2, is an air supply and exhaust system for a tunnel-type sterilizing dryer, wherein the air supply and 4
exhaust system comprises an indoor oven assembly 1, a quantitative air supply assembly 2 and a quantitative air exhaust assembly 3 communicating with the oven assembly 1; the quantitative air supply assembly 2 can supply the air into oven assembly 1 steadily according to the actually need and adjust the quantity of supply air; the quantitative air exhaust assembly 3 can exhaust the air into oven assembly 1 steadily and adjust the quantity of exhaust air; the air inlet provided in quantitative air supply assembly 2 is disposed outdoors. The oven assembly 1, as a conventional technology, comprises a tunnel. A preheating section A, a sterilizing dry section B and a cooling section C are sequentially communicated together along the length direction of tunnel. When working, the containers are passed through the preheating section A, the dry sterilization section B and the cooling section C sequentially. One object of the preheating section A is to warm the container up. Laminar flow fan provided in the preheating section A can absorb air through the first air inlet 11 provided in preheating Laminar flow box. The air, which is filtered by the high efficiency particulate air (HEPA) filter and flows to the direction of container located in tunnel, can provide laminar flow protection for container; the dry sterilization section B sterilizes and dries the container; plentiful sticky air, which is produced when the containers entering the tunnel of sterilizing dry section B, is exhausted through the first air exhaust outlet 13 located on the box; the cooling section C can cool down the container; the laminar flow fan of cooling section C can absorb air through the second air inlet 12 provided in cooling laminar flow box. The air, which is filtered by the high efficiency particulate air (HEPA) filter to the direction of container located in tunnel, can provide laminar flow and cooling protection for the container; in order to facilitate pouring, the container is allowed cooling to the room temperature under the protection of pure laminar flow; after heat exchange, the air is exhausted through the second air exhaust outlet 14 located on the box. The quantitative air supply assembly 2 is communicated with the first air inlet 11 and the second air inlet 12 to supply air. The quantitative air exhaust assembly 3 is communicated with the first air exhaust outlet 13 and the second air exhaust outlet 14 to exhaust air. Because of that the quantitative air supply assembly 2 can collect air through the air inlet from outdoors, it is easy to control and maintain the indoor pressure difference and laminar flow in the productive process. As a result, the stability and controllability of the pressure difference and the effect of laminar flow in oven assembly tunnel are satisfied with the new edition GMP; due to the quantitative
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air supply assembly 2 can supply air independently, the working pressure of indoor air-condition system are reduced and the service life of high efficiency particulate air (HEPA) filter are extended.
[0027] The first preferred embodiment, the quantitative air supply assembly 2 comprises an outdoor inlet air-conditioning unit 21, an inlet duct 22 communicating with the inlet air-conditioning unit 21 and the indoor oven assembly 1; the air inlet is located on inlet air-conditioning unit 21. As a conventional technology, the outdoor inlet air-conditioning unit 21 through the outdoor air inlet can collect air from outdoors. The inlet air-conditioning unit 21 can further reduce the interference with the indoor environment, and more beneficial to maintain the indoor pressure difference and the stability of laminar flow. The inlet duct 22 comprises a preheating inlet duct 23 and a cooling inlet duct 24. Both the preheating inlet duct 23 and the cooling inlet duct 24 comprise an air supply inlet. The preheating inlet duct 23 passes through the clapboard 5, and the air supply inlet of preheating inlet duct 23 is communicated with the first air inlet 11. The cooling inlet duct 24 passes through the clapboard 5, and the air supply inlet of cooling inlet duct 24 is communicated with the second air inlet 12.When working, the air, after being dried, controlled to constant temperature and purified by the inlet air-conditioning unit 21, will flow to the inlet duct 22. Preheating laminar flow fan can absorb air from the inlet duct 22 through the preheating inlet duct 23 and the first air inlet 11. Cooling laminar flow fan absorbs the air from the inlet duct 22 through the cooling inlet duct 24 and the second air inlet 12. As a result, the container in the tunnel of preheating section A and cooling section C are protected by laminar flow. In other preferred embodiment, the inlet duct 22 can include three or more supply air inlets according to actually need.
[0028] The first preferred embodiment, the quantitative air exhaust assembly 3 comprises an outdoor exhaust outlet box 31 and an exhaust outlet pipe 32 communicating with the exhaust outlet box 31 and the oven assembly. The exhaust outlet pipe 32 comprises a sterilizing dry exhaust outlet pipe 33 and a cooling exhaust outlet pipe 34. Both the sterilizing dry exhaust outlet pipe 33 and the cooling exhaust outlet pipe 34 include an air inlet. The sterilizing dry exhaust outlet pipe 33 passes through the clapboard 5, and the air inlet of sterilizing dry exhaust outlet pipe 33 is communicated with the first air exhaust outlet 13. The cooling exhaust outlet pipe 34 passes through the clapboard 5, and the air inlet of cooling exhaust outlet pipe 34 is communicated with the second air exhaust outlet 14. The medium efficiency filter is 6
located in the exhaust air tunnel of exhaust outlet box 31. When working, the sticky air, which is produced in sterilizing dry section B, are exhausted from the exhaust outlet box 31 to outdoors after passes through the first air exhaust outlet 13 and the sterilizing dry exhaust outlet pipe 33. The exhaust outlet box 31 comprises a backflow prevention assembly 4, which is a medium efficiency filter or high efficiency particulate air (HEPA) filter. The backflow prevention assembly can prevent the unclean air from into the oven when it stops and avoid pollutants contaminating the inside operation environment of oven, conforming to the new edition GMP. Besides, the exhaust outlet box 31 comprises a fan, which can exhaust air and control the speed of exhaust. The fan provided in the exhaust outlet box 31 can reduce the usage of exhaust fan used in cooling section C and maintain the indoor pressure difference effectively and reduce the noise. The fan provided in exhaust outlet box 31 can cancel the exhaust fan used in cooling section C. It means that the exhaust fan used in cooling section C is disposed outdoors, and can further reduce the noise of indoor, keeping the operator healthy.
[0029] The above are only the preferred embodiment of the present invention and the scope of the present invention are not limited by the above embodiments; therefore, all of the technical solutions within the spirit of the present invention should be included within the scope of the present invention. It should be pointed out that this invention includes all modifications encompassed within the spirit and the scope of the present invention; for one skilled in the art.
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We Claim:
1. An air supply and exhaust system for a tunnel-type sterilizing dryer comprising an indoor oven assembly (1), characterized in that the air supply and exhaust system for a tunnel-type sterilizing dryer also comprises a quantitative air supply assembly (2) and a quantitative air exhaust assembly (3) communicating with the oven assembly (1); the air inlet of the quantitative air supply assembly (2) is disposed outdoors.
2. The air supply and exhaust system for a tunnel-type sterilizing dryer according to claim 1, characterized in that wherein said quantitative air supply assembly (2) comprises an outdoor inlet air-conditioning unit (21) and a inlet duct (22) communicating with the inlet air-conditioning unit (21) and the indoor oven assembly (1), the air inlet is located on the inlet air-conditioning unit (21).
3. The air supply and exhaust system for a tunnel-type sterilizing dryer according to claim 2, characterized in that wherein said inlet duct (22) comprises two or more air supply outlets.
4. The air supply and exhaust system for a tunnel-type sterilizing dryer according to claim 1 or 2 or 3, characterized in that wherein said quantitative air exhaust assembly (3) comprises a backflow prevention assembly (4).
5. The air supply and exhaust system for a tunnel-type sterilizing dryer according to claim 4, characterized in that wherein said backflow prevention assembly (4) is a medium efficiency filter or high efficiency particulate air (HEPA) filter.
6. The air supply and exhaust system for a tunnel-type sterilizing dryer according to claim 5, characterized in that wherein said quantitative air exhaust assembly (3) comprises an outdoor exhaust outlet box (31), a exhaust outlet pipe (32) communicating with the exhaust outlet box (31) and the oven assembly (1).
7. The air supply and exhaust system for a tunnel-type sterilizing dryer according to claim 6, characterized in that wherein said exhaust outlet pipe (32) comprises two or more air inlets communicating with the oven assembly (1).
8. The air supply and exhaust system for a tunnel-type sterilizing dryer according to claim 6, characterized in that wherein said medium efficiency filter or high efficiency particulate air (HEPA) filter is located in the exhaust outlet box (31). 8
9. The air supply and exhaust system for a tunnel-type sterilizing dryer according to claim 6, characterized in that wherein said exhaust outlet box (31) comprises a fan.