CN206369422U - A kind of effective integrated flow-through type heat pump drying room - Google Patents

Abstract

The utility model relates to the field of heat pump drying equipment, in particular to an efficient integrated through-flow heat pump drying room, which belongs to the optimization technology of the heat pump drying room. The utility model includes a drying room, a drying room, a material rack, a heat pump unit, an axial flow fan, a thermal insulation wall, a hot air duct, high-temperature and low-humidity air, an auxiliary air plate, an air duct partition, an air inlet, a high-temperature and high-humidity air, and an outlet. Air outlet, moisture outlet, low temperature and high humidity air, fresh air, material rack windshield and material tray. Among them, the drying room is equipped with a thermal insulation wall, and a moisture outlet is provided on one side of the thermal insulation wall, and a fresh air inlet is provided on the other adjacent side; the inner and outer layers of the thermal insulation wall are made of color steel plates, and the inner and outer color steel plates Filled with polyurethane insulation. Both the heat pump unit and the hot air duct are installed in the drying room, and an auxiliary air plate is installed in the hot air duct, and the hot air duct and the drying room are separated by an air duct partition. There are several air inlets on one side of the drying chamber near the hot air duct, and several air outlets on the opposite side, and the positions of the air inlets and air outlets correspond to the gaps between the material trays on the material rack. The material rack is placed in the drying chamber, and several material rack windshields and material trays are arranged on the material rack. Compared with the prior art, the utility model has the advantages of simple structure, uniform drying, good drying effect, low manufacturing cost, high drying efficiency and low energy loss.

Description

A high-efficiency integrated through-flow heat pump drying room

technical field

The utility model relates to the field of heat pump drying equipment, in particular to an efficient integrated through-flow heat pump drying room, which belongs to the optimization technology of the drying room.

Background technique

Today's world is increasingly short of energy, and the drying industry is an industry with great energy-saving potential. Therefore, the significance of research and development of drying technology is very important. Drying technology plays a very important role in the production process of the national economy, especially in the production process of food processing, fruits and vegetables, medicines and biological products.

A heat pump is a thermal energy device that absorbs heat from a low-temperature heat source and utilizes it as effective energy at a higher temperature. The heat pump system is mainly composed of four major components: compressor, condenser, throttle valve and evaporator.

Heat pump drying technology is a high-tech developed in the late 1970s. It has attracted more and more attention because of its unique drying principle, high efficiency and energy saving, fast initial test, high thermal efficiency and good drying quality. The air supply method in the traditional drying room is divided into two types: air-flow ascending type and air-flow descending type. The airflow in the drying room of ascending airflow moves from bottom to top, combining the natural law of hot airflow, so the speed of airflow rising and heat transfer are faster, and the temperature difference in the vertical direction is small. The air flow in the drying room of the airflow descending type moves from top to bottom, and the pressure difference between the inlet and outlet of the drying room brought by the fan makes the air flow circulate, and the temperature and humidity of the drying material plane are relatively uniform. However, these two air supply methods have great inhomogeneity along the length direction of the drying room, that is, the air supply direction. After the air enters the drying room from the air supply port, the pressure and speed are continuously reduced, thus affecting the temperature in the drying room. Field and humidity field distribution, as the drying process proceeds, the inhomogeneity will become more and more obvious, the temperature and humidity inhomogeneity caused by the inhomogeneity of the air supply will become more and more serious, and the drying rate of materials in areas with high wind speed Fast, after fast withering, the gaps become larger, and the wind speed increases again, often resulting in uneven quality of dried materials. When the drying room performs a closed cycle, it is different from the traditional drying room or intensive drying room. The forced exchange with the outside air during the dehumidification stage changes the air volume and direction of the air supply in the drying room, which is caused by the inhomogeneity of the velocity field. The inhomogeneity of the temperature field and humidity field will be more serious.

In order to overcome the defects of uneven temperature field and humidity field in the traditional drying room, the hot air duct and material rack in the drying room are designed to reduce the horizontal temperature difference and vertical temperature difference in the drying process of materials, and achieve uniform drying of materials in the room. Drying quality goals and energy saving goals.

Contents of the invention

The purpose of the utility model is to overcome the shortcomings of the existing heat pump drying room and provide a high-efficiency integrated through-flow heat pump drying room, which not only solves the problems of poor heat preservation effect and high energy consumption, but also solves the problem of poor drying effect , and the cost is low, the structure is simple, the reliability is good, the production and installation are convenient, and the drying efficiency of the heat pump drying room is effectively improved.

The utility model is completed through the following technical solutions: a high-efficiency integrated through-flow heat pump drying room is composed of a drying room, a drying room, a material rack, a heat pump unit, an axial flow fan, a thermal insulation wall, a hot air duct, high-temperature and low-humidity air, auxiliary Air plate, air duct partition, air inlet, high temperature and high humidity air, air outlet, humidity outlet, low temperature and high humidity air, fresh air, material rack windshield and material tray. Among them, the drying room is designed with a rectangular parallelepiped structure, and is equipped with a thermal insulation wall to insulate the drying room. A moisture outlet is provided on one side of the thermal insulation wall, and a fresh air inlet is provided on the adjacent other side; the thermal insulation wall The inner and outer layers are made of color steel plates, and polyurethane insulation materials are filled between the inner and outer color steel plates; the hot air duct and the drying room are separated by air duct partitions; the drying room has several air inlets on the side close to the hot air duct, and the opposite side has A plurality of air outlets, and the positions of the air inlets and air outlets correspond to the gaps between the material trays on the material rack. The material rack is placed in the drying chamber, and several material rack windshields and material trays are arranged on the material rack.

Working principle: In the actual operation process, the materials to be dried are placed on the material tray in the drying room, and the high-temperature and low-humidity air is sent into several air inlets on one side of the drying room through the axial flow fan set in the hot air duct. into the drying chamber. When the high-temperature and low-humidity air enters the drying room through the air inlet, the high-temperature and high-humidity air flows from the top of the material tray through the mesh of the tray to the bottom of the material tray due to the action of the material shelf windshield installed on the material shelf. As the temperature rises, the moisture in the material evaporates into the air, which increases the humidity of the high-temperature and low-humidity air and becomes high-temperature and high-humidity air, which is finally discharged from the drying room. Then the high-temperature and high-humidity air enters the heat pump unit for heating and dehumidification, and then becomes high-temperature and low-humidity air again and enters the hot air duct to form a circulation channel for the dry air flow. In addition, the drying room is equipped with a temperature sensor and a humidity sensor, which are connected to the controller. When the controller detects that the temperature value returned by the temperature sensor is higher than the preset maximum temperature, the controller shuts down the heat pump unit. At this time, only the shaft The flow fan works until the controller detects that the temperature value returned by the temperature sensor is lower than the preset maximum temperature, and the controller starts the heat pump unit; when the controller detects that the humidity value returned by the humidity sensor is higher than the preset value When the humidity reaches the maximum value, the controller starts the dehumidification fan in the heat pump unit, until the controller detects that the humidity value transmitted by the humidity sensor is lower than the preset maximum humidity, the controller turns off the dehumidification fan in the heat pump unit.

Compared with the prior art, the utility model has the following advantages:

The utility model has the advantages of low manufacturing cost, simple structure, good reliability, convenient manufacture and installation, good drying effect and high drying efficiency.

Both the hot air duct and the heat pump unit are built in the drying room, which is not only easy to install, but also does not need to be insulated for the hot air duct, and the heat lost by the pipeline is also in the drying room.

At the same time, the cycle drying method is adopted, which can reduce the energy consumption required for product drying and reduce the drying cost.

When the temperature in the drying room is too high, the control system will start automatic fresh air supply and automatic exhaust operation to avoid the adverse effects of high temperature on crops and ensure the quality of dried products.

Description of drawings

Figure 1: a schematic diagram of the system structure of the utility model;

Fig. 2: the side view of the utility model;

Figure 3: Schematic diagram of the structure of the material rack in the drying room of the utility model.

Explanation of reference signs: 1 drying room; 2 drying room; 3 material rack; 4 heat pump unit; 5 axial flow fan; 6 thermal insulation wall; 7 hot air duct; 11 air inlet; 12 high temperature and high humidity air; 13 air outlet; 14 humidity outlet; 15 low temperature and high humidity air; 16 fresh air; 17 material rack windshield;

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.

As shown in Figures 1 to 3, a high-efficiency integrated through-flow heat pump drying room described in the present invention includes a drying room (1), a drying room (2), a material rack (3), and a heat pump unit (4) , axial flow fan (5), thermal insulation wall (6), hot air duct (7), high temperature and low humidity air (8), auxiliary air plate (9), air duct partition (10), air inlet (11), High-temperature and high-humidity air (12), air outlet (13), moisture outlet (14), low-temperature and high-humidity air (15), fresh air (16), material rack windshield (17) and material tray (18).

The drying room (1) adopts a rectangular parallelepiped structure design, and is provided with a thermal insulation wall (6) for thermal insulation of the drying room (1), and a moisture discharge port (14) is provided on one side of the thermal insulation wall (6), A fresh air (16) inlet is provided on the adjacent other side.

The inner and outer layers of the thermal insulation wall (6) are made of color steel plates, and polyurethane thermal insulation material is filled between the inner and outer color steel plates, which has good thermal insulation performance and low thermal conductivity, which greatly improves the thermal insulation effect of the drying room (1).

Both the heat pump unit (4) and the hot air duct (7) are installed in the drying room (1). The hot air duct (7) and the drying chamber (2) are separated by the air duct partition (10), which is easy to install and does not require heat preservation, because the heat lost by the hot air duct (7) is also lost in the drying room (1) Therefore, the heat lost in the hot air duct (7) is small; the auxiliary air plate (9) is installed in the hot air duct (7) to reduce the local resistance in the hot air duct (7).

The hot air duct (7) is separated from the drying chamber (2) by an air duct partition (10). The drying chamber (2) has several air inlets (11) on the side close to the hot air duct (7), and several air outlets (13) on the opposite side, and the positions of the air inlets (11) and air outlets (13) are in line with the material rack (3) The gaps between the upper material trays (18) correspond to each other.

The material rack (3) is placed in the drying chamber (2), and there are several material rack windshields (17) and material trays (18) on the material rack (3). When the high-temperature and low-humidity air (8) enters the drying chamber (2) through the air inlet (11), due to the action of the windshield (17) on the material rack (3), the high-temperature, high-humidity air (12) flows from the material The upper part of the tray (18) flows through the mesh of the tray to the lower part of the material tray (18). The high-temperature and low-humidity air (8) increases the temperature of the material, and the moisture in the material evaporates into the air, which increases the humidity of the high-temperature and low-humidity air (8). It becomes high-temperature and high-humidity air (12), and finally it is discharged from the drying chamber (2). There are neatly arranged material racks (3) in the drying room (2), and the materials to be dried are placed on the material trays (18), or hanging material racks are set in the drying room (2), and the drying materials to be hung Hangs on hanging material rack.

The drying chamber (2) is equipped with a temperature sensor and a humidity sensor, and is connected to the controller. When the controller detects that the temperature value transmitted by the temperature sensor is higher than the preset maximum temperature, the controller shuts down the heat pump unit ( 4), at this time only the axial flow fan (5) works until the controller detects that the temperature returned by the temperature sensor is lower than the preset maximum temperature, and the controller starts the heat pump unit (4); when the controller detects The humidity value sent back by the humidity sensor is higher than the preset maximum humidity, and the controller starts the dehumidification fan in the heat pump unit (4) until the controller detects that the humidity value sent back by the humidity sensor is lower than the preset humidity The maximum value, the controller turns off the dehumidification fan in the heat pump unit (4).

In a word, the utility model has the advantages of low cost, simple structure, good reliability, convenient manufacture and installation, good drying effect and high drying efficiency.

The above specific embodiments are only for the purpose of enabling those skilled in the art to better understand the content of the patent, and should not be construed as limiting the scope of protection of the utility model patent. Those of ordinary skill in the art may make various changes or substitutions within the essential scope of the present utility model, which shall also belong to the protection category of the present utility model.

Claims (4)

1. A high-efficiency integrated through-flow heat pump drying room, including drying room, drying room, material rack, heat pump unit, axial flow fan, thermal insulation wall, hot air duct, high-temperature and low-humidity air, auxiliary air plate, air duct partition panels, air inlets, high-temperature and high-humidity air, air outlets, humidity outlets, low-temperature and high-humidity air, fresh air, material rack windshields and material trays; the drying room is designed with a rectangular parallelepiped structure and is equipped with thermal insulation walls. The drying room is insulated, and a moisture outlet is provided on one side of the thermal insulation wall, and a fresh air inlet is provided on the other adjacent side; the inner and outer layers of the thermal insulation wall are made of color steel plates, and polyurethane insulation materials are filled between the inner and outer color steel plates The hot air duct and the drying room are separated by an air duct partition; the drying room has a number of air inlets on the side close to the hot air duct, and a number of air outlets on the opposite side. 2. A high-efficiency integrated through-flow heat pump drying room according to claim 1, characterized in that: both the heat pump unit and the hot air duct are installed in the drying room. 3. A high-efficiency integrated through-flow heat pump drying room according to claim 1, characterized in that: an auxiliary air plate is installed in the hot air duct to reduce local resistance in the hot air duct. 4. A high-efficiency integrated through-flow heat pump drying room according to claim 1, characterized in that: the positions of the air inlet and the air outlet correspond to the gaps between the material trays on the material rack.