CN201193918Y

CN201193918Y - High-efficient vertical microwave vacuum drying machine

Info

Publication number: CN201193918Y
Application number: CNU2008200316748U
Authority: CN
Inventors: 张文华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-02-02
Filing date: 2008-02-02
Publication date: 2009-02-11
Anticipated expiration: 2018-02-02

Abstract

The utility model relates to a high-efficiency vertical microwave vacuum drier, which belongs to a device in the drying field. The drier comprises a box body, microwave-emitting sources, a rotary shaft, at least one layer of material tray and microwave-reflecting screens; wherein, the microwave-emitting sources are arranged on one side of the box body; the rotary shaft is arranged in the box body; the material trays are detachably mounted on the rotary shaft; and each microwave-reflecting screen which is shaped like a reverse frustum and fixed on the rotary shaft is arranged over one layer of material trays. The tapered walls of the microwave-reflecting screens reflect the microwave emitted by the microwave-emitting sources to the material trays, so that the materials in the material trays can be uniformly heated and dried. The microwave-reflecting direction can be effectively set in order to increase the utilization rate of the microwave of the drier, so that the materials can be uniformly heated, consequently, the drying speed can be increased, and energy consumption can be reduced.

Description

The high-efficiency vertical microwave vacuum dryer

Technical field

The utility model relates to a kind of dry materials, sterilizing installation high-efficiency vertical microwave vacuum dryer that is mainly used in the fields such as pharmacy, food, chemical industry, feed.

Background technology

Vertical microwave vacuum dryer comprises the casing that is provided with microwave launcher, and dismountable material disc is equipped with in the vertical rotating shaft of establishing in the case in the rotating shaft.During use, in the material discs of packing into equably such as the material of needs drying such as cereal, flour, tealeaves, charging tray rotates with rotating shaft, the microwave energy heating that material is launched by microwave launcher in the dish and by vacuum drying.Yet because microwave launcher is positioned at a side of casing, the distance of the material on the charging tray and microwave emitting side is inconsistent, so the microwave intensity difference that is subjected to, cause be heated inhomogeneous; Promptly near the microwave intensity height of microwave emitting side, temperature of charge is higher, and it is excessive to be easy to generate local heat, even may cause part burned; Then microwave intensity is low away from the material of microwave emitting side, and temperature is lower, may be dry not enough.This uneven situation of being heated causes the dry materials degree varies to cause, and influences the quality of material, even produces waste product.In addition, because microwave runs into behind rotating shaft, the cabinet wall face by irregular reflection, and accurate directive material, make a large amount of microwaves do not absorbed by material and cause the very big waste of microwave energy that capacity usage ratio is low, energy resource consumption is bigger.

The utility model content

The purpose of this utility model provides a kind of high-efficiency vertical microwave vacuum dryer simple in structure, and it can make most of microwave directive material through reflection, improves the microwave energy utilization ratio.

For solving the problems of the technologies described above, the utility model high-efficiency vertical microwave vacuum dryer comprises casing, places the microwave rf generator of this casing one side, be provided with rotating shaft in the casing, at least one deck material disc removably is placed in the rotating shaft, and the top of every layer of material disc is provided with the inversed taper platform shape microwave reflective screen that is fixed in the rotating shaft.

The microwave that this microwave reflective screen will be launched from microwave rf generator reflexes to material disc by the conical outer wall of radiation shield, makes in the dish material by the even heat drying of microwave.

Said microwave reflective screen is the rounding frustum shape of the hollow made of metal material, and the cone angle alpha of microwave reflective screen can be located between 40 °～120 °, is preferably 70 °～80 °.

After adopting such structure, owing to only need in rotating shaft, to be provided with microwave reflective screen, this microwave reflective screen can will reflect to the material disc direction from the microwave that microwave rf generator is launched, control the reflection direction of microwave effectively, improve the microwave energy utilization rate of drying machine, can finish the drying of material in the short period of time, save the energy; And it is simple in structure, with low cost.Select suitable cone angle alpha, microwave energy is reflexed in the scope of material disc exactly, material receives microwave energy more equably.

Description of drawings

Below in conjunction with accompanying drawing the specific embodiment of the present utility model is described in further detail.

Fig. 1 is the structural representation of this vertical microwave vacuum dryer.

Fig. 2-Fig. 4 represents each example structure of microwave reflective screen.

The specific embodiment

Referring to Fig. 1, one side of the casing 1 of this vertical microwave vacuum dryer is provided with microwave rf generator 3, is provided with rotating shaft 2 in the casing, is fixed with several layers carriage 7 in the rotating shaft 2, material disc 4 is placed on the carriage 7, and the top of every layer of material disc 4 is provided with the microwave reflective screen 5 that is fixed in the rotating shaft 2; This microwave reflective screen 5 will be gone into the described material disc 4 from the microwave reflection that microwave rf generator 3 is launched, and make material 6 evenly accept heating using microwave.

Referring to Fig. 2 to Fig. 4, the rounding frustum shape that microwave reflective screen 5 is made by stainless sheet steel, the shape of its osculum end and rotating shaft 2 are suitable and be socketed in the rotating shaft 2, and cone angle alpha is preferably 70-80 °.

Microwave reflective screen 5 shown in Figure 3 is with difference shown in Figure 2, osculum end at the hollow cone platform also extends one section neck 5-1, this 5-1 neck is provided with at least one screwed hole 5-2 radially, connects by screw, and microwave reflective screen 5 is fixed in the described rotating shaft 2.

Microwave reflective screen 5 shown in Figure 4 is that with difference shown in Figure 5 the frustum of a cone comprises the conical surface of two continuous different taperings, and promptly taper seat 5-3,5-4, and both can be made into integration, and also can be separately made then to constitute one by welding.

The utility model is not limited to Fig. 1 to embodiment shown in Figure 4.Microwave reflective screen of the present utility model can also adopt other shape, for example form such as the pyramid of hollow, hyperbola cone table.

Claims

1. high-efficiency vertical microwave vacuum dryer, a side that comprises casing (1), casing is provided with microwave rf generator, be provided with rotating shaft (2) in the casing, at least one deck material disc (4) removably is placed in the rotating shaft (2), it is characterized in that the top of every layer of material disc (4) is provided with the back taper microwave reflective screen (5) that is fixed in the rotating shaft (2).

2. vertical microwave vacuum dryer according to claim 1, the cone angle alpha that it is characterized in that wave reflection screen (5) is between 40 °～120 °.

3. high-efficiency type microwave vacuum dryer according to claim 2 is characterized in that the cone angle alpha of wave reflection screen (5) is 70 °～80 °.