Micro negative pressure drying room

Abstract

The utility model relates to the technical field of drying equipment for agricultural products and industrial products, in particular to a micro-negative pressure drying room which comprises a drying room body, and the drying room body comprises a drying room and a heat source room which are adjacent in the horizontal direction. The drying chamber is divided into an upper drying cavity and a lower air uniformizing cavity by a horizontally arranged porous plate; a hot air device is arranged between the lower portion of the heat source chamber and the air uniformizing cavity, and air in the heat source chamber is heated and then fed into the air uniformizing cavity. And a negative pressure fan is arranged between the upper part of the heat source chamber and the drying cavity. Under the suction of the negative-pressure fan and the moisture removal fan, a micro-negative-pressure state can be formed, meanwhile, uniform arrangement of heat is not affected, petal type, leaf type or wind-sensitive type materials cannot be affected by wind blowing positive pressure in the drying process, the situation that the materials are blown to a pile, and the drying efficiency is improved is avoided. Or the materials are blown into a drying chamber where the materials are scattered outside the trolley, and the drying effect and post-treatment are seriously affected.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment for agricultural products and industrial products, in particular to batch hot air drying, specifically to a micro-negative pressure drying room. Background Art

[0002] In order to preserve agricultural products for a long time, most of them need to be dried. At present, most of the drying methods on the market can be divided into hot air drying, microwave drying, vacuum freeze drying, etc. in principle. Hot air drying is widely used due to its simple structure and convenient energy acquisition method. At present, the hot air drying room on the market is basically composed of a drying room, a fan, a heat source, a material cart, etc. After the air is heated by the heat source, it is blown directly to the material cart by the blower. The hot air in the drying room can circulate up and down, left and right, or up and down, left and right at the same time according to the arrangement of the fan inside the drying room, so as to achieve the purpose of drying.

[0003] In common hot air drying rooms, the blower blows hot air to the drying room material cart, which can make the whole drying room in a positive pressure state, which is conducive to the ability of the hot air in the drying room to penetrate the material. This is no problem for some materials with heavier specific gravity, and it is indeed a more feasible way of air supply. However, for some materials with lighter specific gravity, such as petals, leaves, or wind-sensitive materials (excessive surface wind speed causes deformation), for these types of products, if the materials are under positive pressure, they will be blown into a pile, or blown all over the drying room (the materials are blown out of the material cart, and a large amount of materials will be left in the drying room when the drying is completed), which seriously affects the drying effect and subsequent processing. Utility Model Content

[0004] The main purpose of the utility model is to provide a micro-negative pressure drying room to better adapt to the drying of materials with lighter specific gravity, to avoid the materials being blown into a pile under positive pressure, or being blown to scatter outside the material cart, which seriously affects the drying effect and subsequent processing.

[0005] In order to achieve the above-mentioned object, according to one aspect of the utility model, a slightly negative pressure drying room is provided, comprising a drying room body, wherein the drying room body comprises a drying room and a heat source room adjacent to each other in a horizontal direction.

[0006] The drying chamber is divided into an upper drying chamber and a lower air distribution chamber by a horizontally arranged porous plate; during operation, hot air can pass through the porous plate and enter the drying chamber from the air distribution chamber upward.

[0007] A hot air device is arranged between the lower part of the heat source chamber and the air distribution chamber to heat the air in the heat source chamber and then send it into the air distribution chamber;

[0008] A negative pressure fan is arranged between the upper part of the heat source chamber and the drying chamber; when in operation, the negative pressure fan draws air from the drying chamber to the heat source chamber;

[0009] Dehumidification fans are arranged on the tops of the drying chamber and the heat source chamber.

[0010] As a further improvement, a plurality of wind balancing plates are fixed to the bottom of the wind balancing cavity, and the plate bodies of the wind balancing plates are arranged from bottom to top and are inclined toward the horizontal component of the wind direction.

[0011] As a further improvement, a plurality of material trolleys are arranged in the drying chamber, and the material trolleys can carry the materials to be dried into and out of the drying chamber.

[0012] As a further improvement, a cart slope is provided at the entrance of the drying chamber, with a slope between 10 and 20 degrees.

[0013] As a further improvement, the hot air device comprises a heat source and a blower connected to each other, the air outlet of the blower is connected to the air distribution cavity, and the heat source is installed at the air inlet. There can be multiple blowers, which are distributed as evenly as possible.

[0014] As a further improvement, the heat source may be one of an electric heating tube, a heat pump condenser or a steam heat exchanger.

[0015] As a further improvement, there may be multiple negative pressure fans evenly arranged on the installation surface.

[0016] As a further improvement, a fresh air inlet is provided at the lower portion of the heat source chamber and an electric fresh air valve is installed.

[0017] As a further improvement, a porous plate support is installed in the air distribution chamber, the bottom end of the porous plate support is fixed to the bottom wall of the air distribution chamber, and the top end supports the porous plate.

[0018] The application of the technical solution of the utility model has the following technical effects:

[0019] The micro-negative pressure drying room provided in this embodiment can form a micro-negative pressure state under the suction of the negative pressure fan and the dehumidification fan, and at the same time does not affect the uniform distribution of heat. Petals, leaves or wind-sensitive materials will not be affected by the positive pressure of the wind during the drying process, thereby preventing the materials from being blown into a pile or being blown into the drying room outside the cart and scattered, which seriously affects the drying effect and subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 The overall structural diagram of the micro-negative pressure drying room according to the utility model is shown;

[0022] Figure 2 Shows Figure 1 Schematic top view of .

[0023] The above drawings include the following reference numerals:

[0024] 1. Blower;

[0025] 2. Heat source;

[0026] 3. Electric fresh air valve;

[0027] 4. Dehumidification fan;

[0028] 5. Negative pressure fan;

[0029] 6. Material trolley;

[0030] 7. Air distribution plate;

[0031] 8. Multi-hole plate;

[0032] 9. Perforated plate support;

[0033] 10. Cart ramp. DETAILED DESCRIPTION

[0034] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0035] The micro-negative pressure drying room provided in this embodiment is as follows Figure 1-2 As shown, it includes a drying chamber body, which includes a drying chamber and a heat source chamber adjacent to each other in a horizontal direction.

[0036] The drying chamber is divided into an upper drying chamber and a lower air distribution chamber by a horizontally arranged porous plate 8. A hot air device is arranged between the lower part of the heat source chamber and the air distribution chamber to heat the air in the heat source chamber and then send it into the air distribution chamber. A number of material carts 6 are arranged in the drying chamber, and the material carts 6 can carry the materials to be dried in and out of the drying chamber. A number of air distribution plates 7 are fixed at the bottom of the air distribution chamber, and the plate bodies of the air distribution plates 7 are arranged from bottom to top and inclined toward the horizontal component of the wind direction. A cart ramp 10 is arranged at the entrance of the drying chamber.

[0037] The hot air device includes a heat source 2 and a blower 1 connected to each other, the air outlet of the blower 1 is connected to the air balancing cavity, and the heat source 2 is installed at the air inlet of the blower. The heat source can be one of an electric heating tube, a heat pump condenser or a steam heat exchanger. A negative pressure fan 5 is arranged between the upper part of the heat source chamber and the drying chamber, and the negative pressure fan 5 draws air from the drying chamber to the heat source chamber. A dehumidification fan 4 is arranged at the top of the drying chamber and the heat source chamber. A fresh air outlet is arranged at the lower part of the heat source chamber and an electric fresh air valve 3 is installed.

[0038] During operation, the material cart is pushed into the drying chamber along the cart ramp 10, and is neatly arranged and fixed. The air is heated by the corresponding heat source 2 and then sent to the air distribution chamber below the drying chamber by the blower 1. After passing through several air distribution plates, the hot air is evenly distributed to the porous plate 8 and enters the drying chamber through the porous plates. Since the hot air passes through the porous plates, it can be guaranteed that the hot air is blown out evenly from each hole, that is, it can be guaranteed that hot air is blown out from each air outlet in the drying chamber, and the dense distribution of the holes can also reduce the pressure entering the drying chamber. The hot air flows through the material under the suction of the negative pressure fan 5 on the left side of the drying chamber, taking away the moist air flow, and the moisture returns to the heat source 2, and the cycle continues.

[0039] When dehumidification is needed, the dehumidification fan 4 is started and the electric fresh air valve 3 is opened. The moisture is blown out by the dehumidification fan 4 at the head and tail of the machine. The fresh air passes through the electric fresh air valve 3 and enters the heat source 2 for heating. After being heated, it is continued to be sent into the air duct below the drying room by the blower 1. This cycle is repeated until the material is dried.

[0040] The following is a further introduction to the various parts of the micro-negative pressure drying room.

[0041] The slope of the cart ramp 10 is selected according to the comfort of the material cart 6 in and out, usually between 10-20 degrees. After the material carts enter the drying chamber, they need to be evenly arranged, and large spaces should be avoided as much as possible. A sealed door needs to be set at the material cart entry and exit position of the drying chamber, and the sealed door is closed after the material cart 6 is pushed in.

[0042] The dehumidification fan 4 at the left head plays the main dehumidification role. When dehumidification is needed, the moisture brought by the negative pressure fan 5 is directly forced to be discharged out of the machine. The dehumidification fan 4 at the right tail plays an auxiliary dehumidification role. Its main purpose is to pull part of the hot air to flow toward the tail, so that the airflow is evenly distributed in the area, avoiding being completely carried away by the left negative pressure fan 5, which can make the temperature distribution in the drying room uniform.

[0043] The arrangement principle of the negative pressure fan 5 is to arrange it as evenly as possible on the entire wall surface, and iron plates are required to seal between the fans. It can achieve uniform suction on the entire cross section. It can be several large-sized fans, or more small-sized fans. The principle is to evenly suck.

[0044] The arrangement principle of the air blowers 1 is to arrange them as evenly as possible in the horizontal direction, and iron plates are required to seal between the air blowers 1 .

[0045] The arrangement of the heat source 2 also needs to refer to the arrangement rule of the blower 1 to ensure that the air duct under the dryer is uniform in the horizontal direction.

[0046] The porous plate 8 is evenly provided with round holes or square holes, and the spacing and hole diameter can be set according to the size of the drying room, so as to ensure that the hot air blown from the bottom of the drying room is evenly distributed throughout the drying chamber. The air distribution chamber is provided with a porous plate support 9, the bottom end of which is fixed to the bottom wall of the air distribution chamber, and the top end supports the porous plate.

[0047] It can be seen from the structure and working process of the micro-negative pressure drying room provided in this embodiment that a micro-negative pressure state can be formed in the entire drying room under the suction of the negative pressure fan and the dehumidification fan. At the same time, it does not affect the uniform distribution of heat, so that petals, leaves or wind-sensitive materials will not be affected by the positive pressure of the wind during the drying process, avoiding the problem that the materials will be blown into a pile, or the materials will be blown into the drying room where the materials are scattered outside the trolley, which seriously affects the drying effect and post-processing.

[0048] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A slightly negative pressure drying room, comprising a drying room body, characterized in that: The drying chamber body comprises a drying chamber and a heat source chamber adjacent to each other in a horizontal direction; The drying chamber is divided into an upper drying chamber and a lower air distribution chamber by a horizontally arranged porous plate; A hot air device is arranged between the lower part of the heat source chamber and the air equalization chamber; A negative pressure fan is arranged between the upper part of the heat source chamber and the drying chamber; Dehumidification fans are arranged on the tops of the drying chamber and the heat source chamber.

2. The micro-negative pressure drying room according to claim 1, characterized in that: A plurality of air balancing plates are fixed at the bottom of the air balancing cavity, and the plate bodies of the air balancing plates are arranged from bottom to top and are inclined toward the horizontal component of the wind direction.

3. The micro-negative pressure drying room according to claim 1, characterized in that: A plurality of material carts are arranged in the drying chamber, and the material carts can carry the materials to be dried into and out of the drying chamber.

4. The micro-negative pressure drying room according to claim 3, characterized in that: A cart slope is arranged at the entrance of the drying chamber, and the slope is between 10 and 20 degrees.

5. The micro-negative pressure drying room according to claim 1, characterized in that: The hot air device comprises a heat source and an air blower connected to each other, the air outlet of the air blower is connected to the air equalizing cavity, and the heat source is installed at the air inlet.

6. The micro-negative pressure drying room according to claim 5, characterized in that: The heat source may be one of an electric heating tube, a heat pump condenser or a steam heat exchanger.

7. The micro-negative pressure drying room according to claim 1, characterized in that: There are no less than two negative pressure fans, which are evenly arranged on the installation surface.

8. The micro-negative pressure drying room according to claim 1, characterized in that: A fresh air inlet is provided at the lower part of the heat source chamber and an electric fresh air valve is installed.

9. The micro-negative pressure drying room according to claim 1, characterized in that: The air distribution cavity is provided with a porous plate support, the bottom end of the porous plate support is fixed to the bottom wall of the air distribution cavity, and the top end supports the porous plate.

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