CN201897375U - An energy-saving dryer - Google Patents

Abstract

An energy-saving dryer comprises an air blower, a heating chamber and a drying chamber, wherein the outlet end of the air blower is connected with an air passage, the other end of the air passage is connected with the heating chamber, the heating chamber is connected with the air inlet end of the drying chamber through an air knife, the air knife is arranged in the drying chamber, the air outlet end, far away from the air knife, of the drying chamber is connected with a return pipe, the return air inlet end at one end of the return pipe is communicated with the drying chamber, the return air outlet end at the other end of the return pipe is communicated with the heating chamber, the return air outlet end is positioned above the air knife, a return air blower is arranged on the return pipe at the position, close to the return air inlet end, the middle of the return pipe is provided with a filter, the filter is of a laminated structure and comprises a metal filter screen, an adsorption bag and a resin net, the distance between the, Plant ash and lime powder. The utility model discloses not only the energy consumption is lower, and the cleanliness is better, the security is higher moreover.

Description

An energy-saving dryer

technical field

The utility model relates to a dryer, in particular to an energy-saving dryer, which is particularly suitable for drying PCB boards.

Background technique

At present, in the PCB production, the horizontal line dryer is an essential production equipment, which is mainly divided into a cold air drying section and a hot air drying section. The blower blows into the heating chamber to heat the air up to the specifications, and then blows it to the PCB board through the air knife for hot air drying. This process requires a large amount of electric energy to heat in the heating chamber because it sucks air from the outside of the machine. It exists in the industry. The problem of high energy consumption.

The Chinese patent authorization announcement number is CN201340168Y, and the utility model patent whose authorization announcement date is November 4, 2009 discloses a dryer and its air supply device. Knife, drying chamber and the outlet pipe below the drying chamber, the air blown out by the fan enters the drying chamber through the air supply pipe, the air chamber, and the air knife in turn, and the air chamber includes a main air chamber and at least two side air chambers, so The air supply duct communicates with the main air chamber, the main air chamber communicates with the at least two side air chambers, each of the side air chambers communicates with the air knife, and the air outlets of at least two of the air knife Different directions are facing the position of the object to be dried. Although the drying efficiency of the utility model is relatively high, it needs to inhale air from outside the body and then heat it before the PCB board can be dried with hot air, and the energy consumption is relatively high.

Contents of the invention

The purpose of the utility model is to overcome the defects and problems of high energy consumption in the prior art, and provide an energy-saving dryer with low energy consumption.

In order to achieve the above purpose, the technical solution of the utility model is: an energy-saving dryer, including a blower, a heating chamber and a drying chamber, the outlet end of the blower is connected to the air passage, and the other end of the air passage is connected to the heating chamber. The greenhouses are connected, and the heating chamber is connected with the air inlet end of the drying chamber through the air knife, and the air knife is arranged inside the drying chamber; the air outlet end of the drying chamber away from the air knife is connected with a return pipe; the return pipe The return air inlet at one end communicates with the drying chamber, the return air outlet at the other end communicates with the heating chamber, and the return air outlet is located above the air knife.

A return blower is provided on the return pipe near the return air inlet.

A filter is arranged in the middle of the return pipe.

The distance between the filter and the return blower is smaller than the distance between the filter and the return air outlet.

The filter has a layered structure and includes a metal filter net, an adsorption bag and a resin net, and the distance between the metal filter net and the backflow blower is smaller than the distance between the resin net and the backflow blower.

Graphite powder, plant ash and lime powder are housed in the adsorption bag.

Compared with the prior art, the beneficial effects of the utility model are:

1. In an energy-saving dryer of the present invention, a return pipe is connected to the air outlet end of the drying chamber far away from the air knife. The gas end communicates with the heating room, and the return air outlet is located above the air knife. During use, the dried hot air residual air is injected into the heating room again through the return pipe. After the greenhouse, it only needs to consume very little energy to reach the predetermined temperature. Therefore the energy consumption of the utility model is less.

2. Since a filter is arranged in the middle of the return pipe of an energy-saving dryer of the present invention, the distance between the filter and the return blower is smaller than the distance between the filter and the return air outlet, and this design is beneficial to heat The remaining air is quickly rushed into the heating room by the return blower, thereby reducing the heat loss during the return process. In addition, the filter is a layered structure, including metal filter nets, adsorption bags and resin nets, and the metal filter and return blower The distance between the resin net and the return blower is smaller than the distance between the resin net and the return blower. The adsorption bag is filled with graphite powder, plant ash and lime powder. This design can effectively clean the residual air of hot air to prevent impurities mixed in the residual air of hot air. damage to the equipment and improve the safety of device operation. Therefore, the utility model not only has better cleaning effect, but also has higher safety.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the filter net in Fig. 1 .

In the figure: blower 1, heating chamber 2, drying chamber 3, air passage 4, air knife 5, return pipe 6, return air inlet 61, return air outlet 62, return blower 7, filter 8, metal filter 81 , adsorption bag 82, resin net 83.

Detailed ways

The utility model will be described in further detail below in conjunction with the description of the accompanying drawings and specific embodiments

See Figure 1-2, an energy-saving dryer, including a blower 1, a heating room 2 and a drying room 3, the outlet end of the blower 1 is connected to the air channel 4, and the other end of the air channel 4 is connected to the heating room 2 connection, the heating chamber 2 is connected to the air inlet end of the drying chamber 3 through the air knife 5, and the air knife 5 is arranged inside the drying chamber 3, wherein the air outlet end of the drying chamber 3 away from the air knife 5 is connected with a return pipe 6. The return air inlet 61 at one end of the return pipe 6 communicates with the drying chamber 3 , and the return air outlet 62 at the other end communicates with the heating chamber 2 , and the return air outlet 62 is located above the air knife 5 .

Preferably, a return blower 7 is provided on the return pipe 6 near the return inlet end 61 .

Preferably, a filter 8 is arranged in the middle of the return pipe 6 , and further preferably, the distance between the filter 8 and the return blower 7 is smaller than the distance between the filter 8 and the return air outlet 62 .

Preferably filter 8 is layered structure, comprises metal filter screen 81, adsorption bag 82 and resin net 83, and the distance between metal filter screen 81 and backflow blower 7 is less than the distance between resin net 83 and backflow blower 7, further Graphite powder, plant ash and lime powder are housed in the preferred adsorption bag 82 .

The utility model improves the air source and air intake process of the hot air blower, uses the residual hot air in the drying chamber 3 as the air source, and changes the air intake from outside the machine to the air intake inside the machine. After the filter 8 filters the floating dust and debris, it enters the heating chamber 2, and then circulates to the air knife 5 and blows it into the drying chamber 3 for PCB board drying. Compared with the air outside the machine, the residual air of the hot air after the operation of the equipment is relatively close. The temperature of the heating chamber 2 can effectively reduce the power consumption of the heating chamber 2 .

It can be seen from the above that the utility model not only has lower energy consumption, but also has better cleanliness and higher safety.

The above are only preferred embodiments of the present utility model, and the protection scope of the present utility model is not limited to the above-mentioned embodiments, but any equivalent modification or change made by those of ordinary skill in the art according to the content disclosed in the present utility model, All should be included in the scope of protection described in the claims.

Claims (5)

1. energy-saving dryer, comprise air blast (1), hot room (2) and hothouse (3), the port of export of described air blast (1) is connected with air flue (4), the other end of air flue (4) is connected with hot room (2), hot room (2) is connected by the inlet end of air knife (5) with hothouse (3), and air knife (5) is arranged on the inside of hothouse (3), it is characterized in that:

Described hothouse (3) upward is connected with return duct (6) on the outlet side away from air knife (5); The backflow inlet end (61) of described return duct (6) one ends communicates with hothouse (3), and the backflow outlet side (62) of the other end communicates with hot room (2), and backflow outlet side (62) are positioned at the top of air knife (5).

2. a kind of energy-saving dryer according to claim 1 is characterized in that: the position that described return duct (6) is gone up nearly backflow inlet end (61) is provided with reflux drum blower fan (7).

3. a kind of energy-saving dryer according to claim 1 and 2 is characterized in that: the middle part of described return duct (6) is provided with filter (8).

4. a kind of energy-saving dryer according to claim 3 is characterized in that: the distance between described filter (8) and the reflux drum blower fan (7) is less than the distance between filter (8) and backflow outlet side (62).

5. a kind of energy-saving dryer according to claim 3, it is characterized in that: described filter (8) is layer structure, comprise metal filter screen (81), absorbent packet (82) and resin web (83), and the distance between metal filter screen (81) and the reflux drum blower fan (7) is less than the distance between resin web (83) and the reflux drum blower fan (7).

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