CN206192059U - Energy -conserving drying device of household - Google Patents

Abstract

A household type energy-saving drying device, including an air heat exchanger, an air source heat pump unit, a solar collector, a drying chamber, an air inlet, an air inlet of the drying chamber, an air outlet of the drying chamber, a proportional air valve, an air pipe, and a heat exchange Air inlet, air outlet, air duct partition, material rack, drying chamber door, support frame, vacuum pipe, header, air duct and air duct partition air hole. The utility model can not only recover the waste heat of high-temperature and high-humidity tail gas from the drying chamber, but also the recovered waste heat can complete the preheating of the fresh air, which can greatly improve the thermal efficiency of the system; The problem of uneven temperature distribution in the drying chamber is solved; at the same time, the solar collector is installed on the top of the entire device, which saves space, has good drying effect, low energy consumption, and small structure, which is convenient for large-scale promotion.

Description

A household type energy-saving drying device

technical field

The utility model relates to a drying device, in particular to a household type energy-saving drying device, which belongs to the technical field of combined drying of solar energy and heat pumps.

Background technique

The traditional open-air natural drying method has many disadvantages: low efficiency, large footprint, time-consuming and labor-intensive, easily affected by climatic conditions such as showers and plum rains, and easily polluted by wind, sand, dust, insects, etc., making it difficult to ensure drying Quality of food and agricultural by-products. In the context of energy crisis and environmental crisis, green drying is the development trend of the drying industry, and the combined drying of solar energy and heat pumps, as one of the ways of green drying, has attracted more and more attention.

The combined drying system of solar energy and heat pump can not only improve the thermal efficiency of the solar heat collection system, but also improve the heating performance of the heat pump. As early as the last century, scholars at home and abroad have used solar energy and heat pump combined drying systems to dry many industrial and agricultural products. Research experiments have found that the system has advantages that solar energy and heat pumps do not have when they operate alone: significant economic benefits, greatly shortened drying time, and reduced dependence on weather for solar drying alone.

In the existing solar drying systems, heat pump drying systems and combined solar and heat pump drying systems, most of the dehumidification methods used are to discharge high-temperature and high-humidity tail gas directly into the atmosphere. At the same time, the existing solar energy and heat pump combined drying device is relatively large, which is inconvenient and large-scale promotion.

Contents of the invention

The problem solved by the technology of the utility model is: to overcome the above-mentioned defects or deficiencies existing in the existing solar drying and heat pump drying systems, and to provide a household type energy-saving drying device. The device not only has less heat loss, but also greatly meets the requirement of recovering waste heat. At the same time, the problem of uneven temperature distribution in the drying chamber is also solved.

The utility model is completed through the following technical solutions: a household type energy-saving drying device, including an air heat exchanger, an air source heat pump unit, a solar heat collector, a drying chamber, an air inlet, an air inlet of the drying chamber, an air outlet of the drying chamber, Proportional air valves, air ducts, heat exchanger air inlets, air outlets, air duct partitions, material racks, drying chamber door support frames, vacuum pipes, headers, air ducts and air duct partition air holes.

The solar heat collector is a vacuum tube air heat collector or a flat air heat collector, and it is installed on the top slope of the drying chamber, and the entire drying device is arranged facing south according to the top slope.

The drying chamber is welded by double-layer stainless steel plates, and the middle is filled with polyurethane foam insulation material, which can effectively reduce the heat loss of the drying chamber. The drying device is provided with a universal wheel support frame.

The air inlet is equipped with a centrifugal fan, which blows fresh air into the solar heat collector for heating. The centrifugal fan can be a low-temperature fan.

A direct-flow axial flow fan is installed at the air inlet of the drying chamber, and the hot air from the air source heat pump unit and the solar heat collector is blown into the drying chamber through the direct-flow axial flow fan.

The air outlet of the drying chamber is equipped with a direct-flow axial flow fan, which blows the high-temperature and high-humidity air in the drying chamber into the air heat exchanger, and exchanges heat with the fresh air entering the air heat exchanger. The direct-flow axial flow fans installed at the air inlet and outlet of the drying chamber are all high-temperature-resistant fans to prevent the fans from being burned out due to excessive temperature.

The proportional air valve is installed with an air valve capable of adjusting the ratio of opening and closing.

The drying chamber has a drying chamber air inlet and a drying chamber air outlet, and the drying chamber door adopts a double-door design.

There are several air duct partition air holes at equal intervals on the air duct, and the air holes adopt the design of variable cross-section air holes, the air holes near the air outlet of the drying chamber are larger, and the air holes far away from the air outlet of the drying chamber are smaller.

The air duct separator is made of punched stainless steel plate material, and both sides are flat.

Compared with the prior art, the utility model has the following advantages: the utility model is equipped with an air heat exchanger, which can not only recover the waste heat of high-temperature and high-humidity tail gas from the drying chamber, but also can complete the preheating of the fresh air by recovering the waste heat , which can greatly improve the thermal efficiency of the system; the problem of uneven temperature distribution in the drying room is solved through the reasonable design of the air hole of the air duct partition; Low power consumption, small structure, convenient for large-scale promotion.

Description of drawings

Fig. 1: Schematic diagram of the structure of the utility model.

Figure 2: Side view of the utility model.

Fig. 3: The top view of the drying chamber of the present utility model.

Figure 4: Schematic diagram of the structure of the air duct partition in the drying room of the utility model.

Explanation of reference signs: 1 air heat exchanger; 2 air source heat pump unit; 3 solar collector; 4 drying room; 5 air inlet; 6 drying room air inlet; 7 drying room air outlet; Tube; 10 heat exchanger air inlet; 11 air outlet; 12 air duct partition; 13 material rack; 14 drying chamber door; 15 support frame; 16 vacuum tube; 17 header; 18 air duct; .

detailed description

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

Fig. 1 is a schematic diagram of the system structure of the present utility model. A household type energy-saving drying device, including an air heat exchanger (1), an air source heat pump unit (2), a solar heat collector (3), a drying chamber (4), an air inlet (5), and an air inlet of the drying chamber (6), drying chamber air outlet (7), proportional air valve (8), air duct (9), heat exchanger air inlet (10), air outlet (11), air duct partition (12), material rack (13), drying chamber door (14), support frame (15), vacuum pipe (16), header (17), air duct (18) and air duct clapboard air hole (19). Among them, the air inlet (5) is equipped with a centrifugal fan, which blows fresh air into the solar collector (3) for heating; the air inlet (6) of the drying chamber is installed with a DC axial flow fan, and the air source heat pump unit (2 ) and the hot air from the solar heat collector (3) are blown into the drying chamber (4) through the direct-flow axial flow fan; The high-humidity air is blown into the air heat exchanger (1) and exchanges heat with the fresh air entering the air heat exchanger (1). The centrifugal fan installed at the air inlet (5) can be a low-temperature fan, and the direct-flow axial fans installed at the air inlet (6) and the air outlet (7) of the drying chamber are all high-temperature-resistant fans to prevent the fan from being burned out due to excessive temperature . Proportional air valve (8) adopts the air valve that can carry out opening and closing size ratio adjustment to install. The drying chamber (4) is welded by double-layer stainless steel plates, and the middle is filled with polyurethane foam insulation material, which can effectively reduce the heat loss of the drying chamber (4). The drying device is provided with a universal wheel support frame (15) for easy movement.

Fig. 2 is a side view of the system of the present invention. The solar heat collector (3) is a vacuum tube air heat collector or a flat air heat collector, and it is installed on the top slope of the drying chamber (4), and the whole drying device is arranged facing south according to the top slope.

Fig. 3 is a top view of the drying chamber of the present invention. The drying chamber (4) has a drying chamber air inlet (6) and a drying chamber air outlet (7); the drying chamber door (14) adopts a double door design.

Fig. 4 is a schematic diagram of the structure of the air duct partition in the drying room of the present invention. There are several air duct partition air holes (19) at equal intervals on the air duct (18). The air holes (19) adopt the design of variable cross-section air holes. The air holes near the air outlet (7) of the drying chamber are larger and farther away The air holes of the air outlet (7) are smaller. The air duct dividing plate (12) adopts stainless steel plate material to carry out punching and manufacture, and both sides are smooth.

Example 1

Solar independent drying: When the sunlight is sufficient to reach the required temperature of the system, the centrifugal fan at the air inlet (5) is started by controlling the proportional air valve (8), and the fresh air is sent into the solar collector (3) for heating. The hot air with high temperature and low humidity passes through the air duct (9), the proportional air valve (8) and the air inlet (6) of the drying chamber in sequence, and then passes through the direct-flow axial flow fan at the air inlet (6) of the drying chamber to blow the hot air with high temperature and low humidity Blow into drying chamber (4). In the drying chamber (4), the high-temperature and low-humidity hot air evaporates the moisture in the material, becomes high-temperature and high-humidity air, and then enters the air duct ( 18), is sent into the air heat exchanger (1) by the direct-flow axial flow fan in the air outlet (7) of the drying chamber, and discharged into the environment.

Example 2

Heat pump independent heat recovery drying: When there is no sunlight, the air source heat pump unit (2) is started by controlling the proportional air valve (8), and fresh air enters the air source heat pump unit (2) through the air heat exchanger (1) for heating The high-temperature and low-humidity air is blown into the drying chamber (4) through the proportional air valve (8) and the direct-flow axial flow fan at the air inlet (6) of the drying chamber. In the drying chamber (4), the high-temperature and low-humidity hot air evaporates the moisture in the material, becomes high-temperature and high-humidity air, and then enters the air duct ( 18), it is sent into the air heat exchanger (1) by the direct-flow axial flow fan in the air outlet (7) of the drying chamber, and after exchanging heat with the fresh air from the environment, it becomes low-temperature and high-humidity air, and then discharged into the environment; through The fresh air exchanged by the air heat exchanger (1) enters the air source heat pump unit (2) again for heating.

Example 3

Combined solar energy and heat pump heat recovery drying: When the sunlight is insufficient or the temperature required by the system cannot be reached, the centrifugal fan at the air inlet (5) is activated by controlling the proportional air valve (8) to send fresh air into the solar heat collector The device (3) is heated into hot air with high temperature and low humidity, which passes through the air pipe (9), proportional air valve (8) and air inlet (6) of the drying chamber in sequence; at the same time, the air source heat pump unit (2) is started, and the fresh air passes through The air heat exchanger (1) enters the air source heat pump unit (2) to be heated into high-temperature and low-humidity air, which passes through the proportional air valve (8) and the air inlet (6) of the drying chamber. The direct-flow axial flow fan at the air inlet (6) of the drying chamber blows the mixed hot air with high temperature and low humidity from the air source heat pump unit (2) and the solar heat collector (3) into the drying chamber (4). In the drying chamber (4), the high-temperature and low-humidity hot air evaporates the moisture in the material to become high-temperature and high-humidity air, and then enters the air duct (18) through the air duct partition air hole (19) on the air duct partition (12) ), is sent into the air heat exchanger (1) by the direct-flow axial flow fan in the air outlet (7) of the drying chamber, and after heat exchange with the fresh air from the environment, it becomes low-temperature and high-humidity air, and then discharged into the environment; through the air The fresh air exchanged by the heat exchanger (1) enters the air source heat pump unit (2) again for heating.

Claims (6)

1. a kind of residents energy-saving drying device, including air heat exchanger, net for air-source heat pump units, solar thermal collector, drying Room, air inlet, hothouse air inlet, hothouse air outlet, ratio air-valve, airduct, heat exchanger air inlet, air outlet, airduct every Plate, material frame, hothouse door, support frame, vacuum tube, header, air channel and air-duct clapboard air holes.

2. a kind of residents energy-saving drying device according to claim 1, it is characterized in that：Solar thermal collector is vacuum Pipe air collector or flat panel aero heat collector.

3. a kind of residents energy-saving drying device according to claim 1, it is characterized in that：In net for air-source heat pump units and Hothouse air outlet is provided with air heat exchanger.

4. a kind of residents energy-saving drying device according to claim 1, it is characterized in that：Solar thermal collector is arranged on Hothouse top inclined-plane.

5. a kind of residents energy-saving drying device according to claim 1, it is characterized in that：Have on air-duct clapboard equidistantly Some air-duct clapboard air holes, air holes designed using variable cross-section air holes, and the air holes near hothouse air outlet is larger, away from drying The air holes of room air outlet is smaller.

6. a kind of residents energy-saving drying device according to claim 1, it is characterized in that：Airduct dividing plate uses stainless steel Plate material is punched out making, and two sides is smooth.