CN202371972U - Heat pump drying device - Google Patents

Abstract

The utility model discloses a heat pump drying device, which comprises a drying box and a control system. The drying box includes a casing and an air inlet fan arranged in the casing, a dehumidification heat pump, a main fan, a material rack, an air outlet fan, and a heating heat pump. ;When the air inlet and exhaust outlet are closed, the dehumidification heat pump, main fan, material rack, heating heat pump, and dehumidification heat pump are connected in sequence to form a circulation path for drying medium; when the air inlet and exhaust outlet are opened, the exhaust outlet , dehumidification heat pump, main fan, material rack, and air outlet are connected in sequence to form a one-way flow path for drying medium; the air passage connecting the main fan and material rack is arc-shaped, and an inclined air deflector is arranged in the air passage. The utility model can realize both high-temperature drying and low-temperature drying; it can also meet the temperature and humidity requirements of the same product in different drying stages; The air vortex is reduced, and the drying quality and speed are improved.

Description

A heat pump drying device

technical field

The utility model relates to a drying device, in particular to a heat pump drying device.

Background technique

The drying industry is an industry that consumes a lot of energy. In developed countries, about 10% to 20% of the fuel is used in the drying process. The heat pump is a device that consumes a part of low-grade energy as compensation to transfer heat energy from a low-temperature heat source to a high-temperature heat source. Compared with the traditional drying method, the heating coefficient of performance (COP) of the heat pump can reach more than 3.8, and the heat pump drying has high efficiency. Features of energy saving, low cost, and no pollution to the environment. Moreover, the dehumidification effect of the heat pump is obvious, and the material can be dried quickly at room temperature, thereby ensuring the quality and color of the dried material and producing high-quality products. At present, the problem faced by heat pump drying is that different materials have quite different requirements on temperature, humidity and wind speed during the drying process, and even the same material has different properties in different drying stages. If the material is dried with a constant temperature and humidity, it will not only reduce the production efficiency, but also increase the energy consumption and reduce the quality of the product.

Utility model content

The purpose of the utility model is to overcome the shortcomings and deficiencies of the above-mentioned prior art, and provide a heat pump drying device, which can meet the drying requirements of different products and the temperature and humidity requirements of the same product in different drying stages.

The purpose of this utility model is achieved through the following technical solutions:

A heat pump drying device, including a drying box and a control system, the drying box includes a housing and an air inlet fan, a dehumidification heat pump, a main fan, a material rack, an air outlet fan and a heating heat pump arranged in the housing; the air inlet The fan, dehumidification heat pump, main fan, exhaust fan, and heating heat pump are all connected to the control system; the top of the housing is provided with an air inlet, and the air inlet fan is located in the air inlet; the bottom of the housing is provided with an air outlet , the air outlet is located between the material rack and the heating heat pump, and the air outlet fan is located in the air outlet;

When the air inlet and exhaust outlet are closed, the dehumidification heat pump, main fan, material rack, heating heat pump, and dehumidification heat pump are connected in sequence to form a circulation path of drying medium in the shell;

When the air inlet and the air outlet are opened, the air outlet, the dehumidification heat pump, the main fan, the material rack, and the air outlet are connected in sequence to form a one-way flow path for the drying medium.

The air duct connecting the main fan and the material rack is arc-shaped.

An air deflector is provided in the air passage between the main fan and the material rack, and the included angle between the air deflector and the horizontal plane is 50°-60°.

The control system includes a measurement and control signal processor, a dehumidification heat pump frequency converter electrically connected to the dehumidification heat pump, and a heating heat pump frequency converter electrically connected to the heating heat pump; the measurement and control signal processor is connected to the dehumidification heat pump frequency converter, The heating heat pump frequency converter is connected separately.

The control system also includes a temperature sensing transmitter and a humidity sensing transmitter arranged on the material shelf; the temperature sensing transmitter and the humidity sensing transmitter are respectively connected with the measurement and control signal processor.

The dehumidification heat pump includes a dehumidification heat pump evaporator, a dehumidification heat pump compressor, a dehumidification heat pump throttle valve, a dehumidification heat pump condenser and a dehumidification heat pump drain pipe. The condenser is connected, and the two ends of the dehumidification heat pump compressor are respectively connected with the dehumidification heat pump evaporator and the dehumidification heat pump condenser; the dehumidification heat pump drain pipe is connected with the dehumidification heat pump evaporator; the dehumidification heat pump condenser is connected with the external space connected.

The heating heat pump includes a heating heat pump evaporator, a heating heat pump compressor, a heating heat pump throttle valve, a heating heat pump condenser and a heating heat pump drain pipe, and the two ends of the heating heat pump throttle valve are respectively connected to The heating heat pump evaporator and the heating heat pump condenser are connected, and the two ends of the heating heat pump compressor are respectively connected with the heating heat pump evaporator and the heating heat pump condenser; the heating heat pump drain pipe is connected with the heating heat pump evaporator The condenser is connected; the heating heat pump condenser is located in the air passage between the heating heat pump and the dehumidification heat pump.

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

1. The utility model adopts double heat pumps to control the temperature and humidity of the drying process respectively, which can not only realize the rapid high-temperature drying of some industrial products, but also realize the high-quality low-temperature drying of agricultural products; and can meet the temperature and humidity of the same product in different drying stages. humidity requirements.

2. The utility model improves the shape of the drying chamber and the air deflector. The air duct connecting the main fan and the material rack is arc-shaped. The original horizontally arranged air deflector is changed to a 50°-60° inclination, which can Reduce the vortex of the air flow, make the hot dry air flow through the surface of the material more evenly, and improve the drying quality and drying speed.

3. The utility model is equipped with double circulation paths for the drying medium. When in the high-temperature drying mode, the air inlet and the air outlet are closed, and the drying medium is circulated and dried in the drying chamber, which can make full use of the residual heat of drying, increase the drying temperature, and achieve the purpose of energy saving ;When in the low-temperature drying mode, the air inlet and exhaust outlet are opened, and fresh air continuously enters the drying room, which can effectively reduce the drying temperature and humidity, and ensure the quality of drying.

Description of drawings

Fig. 1 is a sectional view of a heat pump drying device of the present invention.

Detailed ways

The utility model will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the implementation of the utility model is not limited thereto.

Example

As shown in Figure 1, the heat pump drying device of the utility model includes a drying box and a control system, and the drying box includes a housing 1 and an air inlet fan 14 located in the housing 1, a dehumidification heat pump, a main fan 7, and a material rack 6. Air outlet fan 18 and heating heat pump. Air inlet fan 14, dehumidification heat pump, main fan 7, air outlet fan 18, and heating heat pump are all connected with the control system. The top of the casing 1 is provided with an air inlet, and the air inlet fan 14 is located in the air inlet. The dehumidifying heat pump and the main fan 7 are arranged on the upper part of the housing 1, separated from the material rack 6 and the heating heat pump arranged on the lower part of the housing 1 by a partition 5. The upper part of the housing 1 is provided with an arc-shaped baffle 3 perpendicular to the front and rear surfaces of the housing in the direction facing the exhaust outlet of the main fan. The upper end of the arc-shaped baffle 3 is fixedly connected to the upper surface of the housing 1, and the lower end It is fixedly connected to the side surface (the left side of the housing in Fig. 1) of the housing 1 facing the direction of the main fan outlet; The planar sloping plate 4 on the bottom surface of the housing; the arc-shaped baffle 3, the sloping plate 4, the front surface and the rear surface of the housing enclose an arc-shaped air passage connecting the main fan and the material rack. An air deflector 2 is arranged in the arc-shaped air passage, and the included angle between the air deflector and the horizontal plane is 50°.

The control system includes a power switch cabinet 22, a measurement and control signal processor 26, a dehumidification heat pump frequency converter 20 electrically connected to the dehumidification heat pump, a heating heat pump frequency converter 21 electrically connected to the heating heat pump, and a temperature transmitter installed on the material rack. Sensitive transmitter 27 and humidity sensor transmitter 28; said measurement and control signal processor 26 is connected with dehumidification heat pump frequency converter 20, heating heat pump frequency converter 21, temperature sensor transmitter 27 and humidity sensor transmitter Device 28 and power switch cabinet 22 are connected respectively. The dehumidification heat pump frequency converter 20 , the heating heat pump frequency converter 21 , the main fan 7 , the air inlet fan 14 , and the air outlet fan 18 are respectively connected to the power switch cabinet 22 . The measurement and control signal processor 26 is connected with a computer host 24 , and the computer host 24 is connected with a display 25 and a printer 23 .

Dehumidification heat pump includes dehumidification heat pump evaporator 11 (HY-3P (H3) model), dehumidification heat pump compressor (600DHM-90D1 model) 8, dehumidification heat pump throttle valve 9 (J11T-16K model), dehumidification heat pump condenser 10 (JC -YL-E10P model) and the dehumidification heat pump drain pipe 12, the two ends of the dehumidification heat pump throttle valve 9 are respectively connected with the dehumidification heat pump evaporator 11 and the dehumidification heat pump condenser 10, and the two ends of the dehumidification heat pump compressor 8 are respectively It is connected with the dehumidification heat pump evaporator 11 and the dehumidification heat pump condenser 10; the dehumidification heat pump drain pipe 12 is connected with the dehumidification heat pump evaporator 11;

The heating heat pump includes heating heat pump evaporator 15 (HY-3P (H2) model), heating heat pump compressor 17 (403DHV-64D2 model), heating heat pump throttle valve 16 (J11T-16K model), heating heat pump Condenser 13 (JC-YL-E08P model) and heating heat pump drain pipe 19, the two ends of described heating heat pump throttle valve 16 are respectively connected with heating heat pump evaporator 15, heating heat pump condenser 13, described The two ends of the heating heat pump compressor 17 are respectively connected with the heating heat pump evaporator 15 and the heating heat pump condenser 13; the heating heat pump drain pipe 19 is connected with the heating heat pump evaporator 15; the heating heat pump condenser 13 is located at In the air passage between the heating heat pump and the dehumidification heat pump.

When the air inlet and the air outlet are opened, the air outlet, the dehumidification heat pump, the main fan, the material rack, and the air outlet are connected in sequence to form a one-way flow path of the drying medium (the flow path of the drying medium is shown in the direction of the arrow in Figure 1 ), it is in low-temperature drying mode at this time: the external air enters the drying device through the air inlet fan, passes through the dehumidification heat pump evaporator, and is cooled into cold dry air, and the condensed water is discharged through the dehumidification heat pump drain pipe. The cold and dry air flows evenly through the material on the material shelf through the main fan and the air deflector, and takes away the moisture in the material, and finally is discharged through the exhaust fan.

When the air inlet and exhaust outlet are closed, the dehumidification heat pump, main fan, material rack, heating heat pump, and dehumidification heat pump are connected in sequence to form a circulation path of drying medium in the housing (the circulation path of drying medium is shown in the direction of the arrow in Figure 1. At this time, it is in the high-temperature drying mode: after the warm and humid air passes through the heating heat pump evaporator, it is cooled into cold dry air, the condensed water is discharged through the heating heat pump drain pipe, and the cold dry air passes through the heating heat pump condenser, and is cooled to dry air. Heated into hot dry air, and then sent to the dehumidification heat pump evaporator for further dehumidification, through the main fan and wind deflector evenly flow through the material rack, and take away the moisture in the material, and then enter the heating heat pump evaporator for circulation drying .

During the drying process, the host computer compares the collected signals according to the different types of drying process programs stored in advance, and then sends out control signals. The measurement and control signal processor controls the dehumidification heat pump frequency converter, heating heat pump frequency converter, main Fans, inlet fans and exhaust fans. The temperature and humidity in the drying process are monitored by a temperature sensing transmitter and a humidity sensing transmitter respectively. When the drying rate drops, the measurement and control signal processor controls the inverter to reduce the operating frequency of the compressor, and at the same time controls the power switch cabinet to reduce the speed of the fan to achieve the purpose of energy saving. When the humidity of the material in the drying device reaches the set value, the measurement and control signal processor sends a drying termination signal, and the power switch cabinet cuts off the power supply of the compressor, frequency converter and fan, and the drying process ends.

The above-mentioned embodiment is a preferred implementation mode of the present utility model, but the implementation mode of the present utility model is not limited by the described embodiment, and any other changes, modifications, modifications, Substitution, combination, and simplification should all be equivalent replacement methods, and are all included in the protection scope of the present utility model.

Claims (7)

1. a heat pump drying device comprises drying box and control system, it is characterized in that, said drying box comprises housing and is located at air inlet blower fan, dehumidifying heat pump, main air blower, material frame, exhaust outlet blower fan and the heat pump of heating in the housing; Air inlet blower fan, dehumidifying heat pump, main air blower, exhaust outlet blower fan, the heat pump of heating all are connected with the control system; Case top is provided with air inlet, and said air inlet blower fan is positioned at air inlet; Said housing bottom is provided with exhaust outlet, and said exhaust outlet is at the material frame and heat between the heat pump, and the exhaust outlet blower fan is positioned at exhaust outlet;

When air inlet and exhaust outlet were closed, dehumidifying heat pump, main air blower, material frame, the heat pump of heating, dehumidifying heat pump were communicated with successively, in housing, form the circulate path of drying medium;

When air inlet and exhaust outlet unlatching, exhaust outlet, dehumidifying heat pump, main air blower, material frame, exhaust outlet are communicated with successively, form the one-way flow path of drying medium.

2. heat pump drying device according to claim 1 is characterized in that, the air flue that is communicated with between main air blower and the material frame is arcuation.

3. heat pump drying device according to claim 2 is characterized in that, is provided with wind deflector in the air flue between said connection main air blower and the material frame, and the angle of said wind deflector and horizontal plane is 50 °～60 °.

4. heat pump drying device according to claim 1 is characterized in that, said control system comprises to be measured and control signal processor, the dehumidifying heat pump frequency converter that is electrically connected with the heat pump that dehumidifies, the heat pump frequency converter of heating that is electrically connected with the heat pump of heating; Said measurement is connected respectively with dehumidifying heat pump frequency converter, the heat pump frequency converter of heating with the control signal processor.

5. heat pump drying device according to claim 1 is characterized in that, said control system also comprises TEMP transmitter and the humidity sensor transmitter of being located on the material frame; The TEMP transmitter is connected with the control signal processor with measurement respectively with the humidity sensor transmitter.

6. heat pump drying device according to claim 1; It is characterized in that; The dehumidifying heat pump comprises dehumidifying evaporator with heat pump, dehumidifying heat pump compressor, dehumidifying heat pump choke valve, dehumidifying heat pump condenser and dehumidifying heat pump drainpipe; The two ends of said dehumidifying heat pump choke valve are connected with dehumidifying evaporator with heat pump, dehumidifying heat pump condenser respectively, and the two ends of said dehumidifying heat pump compressor are connected with dehumidifying evaporator with heat pump, dehumidifying heat pump condenser respectively; Said dehumidifying heat pump drainpipe is connected with the dehumidifying evaporator with heat pump; Said dehumidifying heat pump condenser is connected with the outside space.

7. heat pump drying device according to claim 1; It is characterized in that; The heat pump of heating comprises the evaporator with heat pump of heating, the heat pump compressor of heating, the heat pump choke valve of heating, the heat heat pump condenser and the heat pump drainpipe of heating; The two ends of the said heat pump choke valve of heating are connected with the evaporator with heat pump of heating, the heat pump condenser of heating respectively, and the two ends of the said heat pump compressor of heating are connected with the evaporator with heat pump of heating, the heat pump condenser of heating respectively; The said heat pump drainpipe of heating is connected with the evaporator with heat pump of heating; In the said air flue of heat pump condenser between the heat pump of heating, dehumidifying heat pump of heating.

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