Solar-assisted air energy heat pump dehumidification type drying room

Abstract

The utility model provides a solar-assisted air energy heat pump dehumidification type drying room, which belongs to the technical field of drying rooms and comprises a drying room, an air energy heat pump unit and a solar heat collection unit. The air energy heat pump unit comprises an evaporator, a compressor, a condenser and a throttle valve which are sequentially connected through a loop, and a working medium exists in the loop; the evaporator, the condenser and the drying room are connected through a first air circulation pipe loop; the solar heat collection unit comprises an air type solar heat collection box and a first suction fan, and the air type solar heat collection box, the drying room and the first suction fan are connected through a second air circulation pipe loop. According to the utility model, two relatively independent drying units, namely the air energy heat pump unit and the solar heat collection unit, are adopted to heat air in the drying room together, so that materials in the drying room can be dried quickly and conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of drying rooms, and particularly relates to a solar-assisted air-energy heat pump dehumidification type drying room. Background Art

[0002] Air source heat pump drying technology uses a heat pump system to transfer low-temperature heat to the material, so that the moisture in the material evaporates and achieves the purpose of drying. During the drying process, the air source heat pump system absorbs heat from the external environment, transfers the heat to the material after compression by the compressor, and achieves the drying of the material. Air source heat pump drying technology has been applied in various fields such as grain drying, tobacco drying, pepper drying, and Chinese medicinal material drying. The use of air source heat pump drying technology can maintain the nutritional content and taste of the product and improve the quality and value of the product.

[0003] At present, domestic drying rooms mainly use single air source heat pump dryers, which mainly use the heat energy in the air. The heat energy from direct sunlight is not fully utilized, and the utilization rate of solar energy is low. Moreover, although air source heat pump dryers consume less electricity than traditional direct electric heating, they still consume a lot of electricity. Summary of the invention

[0004] In view of the problems existing in the prior art in the above-mentioned background technology, the utility model provides a solar-assisted air-source heat pump dehumidification drying room, which improves energy utilization, further reduces power consumption and improves drying efficiency by combining an air-type solar collector box and an air source heat pump.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is a solar-assisted air-energy heat pump dehumidification drying room, including a drying room, an air-energy heat pump unit, and a solar heat collection unit;

[0006] The air energy heat pump unit comprises an evaporator, a compressor, a condenser, and a throttle valve connected in a loop in sequence, and a working medium exists in the loop; the evaporator, the condenser, and the drying room are connected in a loop through a first air circulation pipe;

[0007] The solar heat collection unit comprises an air-type solar heat collection box and a first suction fan, and the air-type solar heat collection box, the drying room and the first suction fan are connected through a second air circulation pipe loop;

[0008] A dehumidification fan is arranged on one side wall of the drying room, and a second suction fan is arranged between the drying room and the evaporator.

[0009] Furthermore, the air-type solar thermal collector box includes an air inlet box, an air outlet box, and a straight-through vacuum thermal collector tube. The two ends of a number of straight-through vacuum thermal collector tubes arranged at equal intervals are respectively connected to the air inlet box and the air outlet box. The air inlet box is connected to the outlet of the first suction fan, and the air outlet box is connected to the drying room.

[0010] Furthermore, a PLC controller is arranged on the outer wall of the drying room, and the PLC controller is electrically connected to the first suction fan, the second suction fan, the dehumidification fan, and the compressor respectively.

[0011] Furthermore, a Venturi mixer is provided on the side wall of the drying room, the air outlet of the condenser is connected to the inlet section of the Venturi mixer, the air outlet of the air outlet box is connected to the throat of the Venturi mixer, and the outlet section of the Venturi mixer is connected to the inside of the drying room.

[0012] Furthermore, an air collecting box is provided in the drying room, an air filter is provided on the air inlet side of the air collecting box, the air collecting box is connected to the first suction fan and the second suction fan respectively, and a condensate discharge pipe is provided on the air outlet side of the evaporator.

[0013] Furthermore, a first temperature sensor and a first gas flow regulating valve are provided on the first air circulation pipe section between the condenser and the Venturi mixer, and a second temperature sensor and a second gas flow regulating valve are provided on the second air circulation pipe section between the gas outlet box and the Venturi mixer. The first temperature sensor, the first gas flow regulating valve, the second temperature sensor, and the second gas flow regulating valve are all electrically connected to the PLC controller.

[0014] Furthermore, an air distribution device is provided in the drying room, and the air distribution device includes a mixing tube, an air distribution disk, and a partition. One end of the mixing tube is connected to the outlet section of the Venturi mixer, and the other end extends into the air distribution disk and is connected to the bottom plate of the air distribution disk. A plurality of ventilation hole groups are axially opened on the side wall of the air outlet end of the mixing tube, and each ventilation hole group is composed of a plurality of first through holes in a circular array. A plurality of partitions in a circular array divide the inner cavity of the air distribution disk into a plurality of air distribution sub-cavities, and a plurality of second through holes are opened on the bottom plate of the air distribution disk.

[0015] Due to the adoption of the above technical scheme, the beneficial technical effect of the utility model is as follows: a solar-assisted air-energy heat pump dehumidification drying room of the utility model adopts two relatively independent drying units, an air-energy heat pump unit and a solar thermal collection unit, to jointly heat the air in the drying room, thereby facilitating rapid drying of materials in the drying room. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a solar-assisted air-energy heat pump dehumidification drying room of the utility model;

[0017] Figure 2It is a three-dimensional diagram of the air distribution device in the utility model;

[0018] Figure 3 This is a front view of the air distribution device in the utility model;

[0019] Figure 4 It is a right side view of the air distribution device in the utility model;

[0020] Figure 5 yes Figure 3 Sectional view along AA direction;

[0021] Figure 6 yes Figure 4 Cross-sectional view along the BB direction;

[0022] Figure markings: 1-drying room, 2-compressor, 3-condenser, 4-throttle valve, 5-evaporator, 6-air type solar collector box, 601-air inlet box, 602-air outlet box, 603-straight-through vacuum collector tube, 7-first suction fan, 8-PLC controller, 9-air distribution device, 901-mixing tube, 9011-first through hole, 902-air distribution plate, 9021-second through hole, 903-partition, 10-Venturi mixer, 11-air collecting box, 1101-air filter, 12-first temperature sensor, 13-second temperature sensor, 14-first gas flow regulating valve, 15-second gas flow regulating valve, 16-dehumidification fan, 17-second suction fan. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below through preferred embodiments.

[0024] Please refer to the attached Figure 1-6 As shown, a solar-assisted air-energy heat pump dehumidification drying room 1 of the present embodiment includes a drying room 1, an air-energy heat pump unit, and a solar thermal collection unit; the air-energy heat pump unit includes an evaporator 5, a compressor 2, a condenser 3, and a throttle valve 4 connected in a loop in sequence, and there is a working medium in the loop; the evaporator 5, the condenser 3, and the drying room 1 are connected through a first air circulation pipe loop; the solar thermal collection unit includes an air-type solar thermal collection box 6 and a first suction fan 7, and the air-type solar thermal collection box 6, the drying room 1, and the first suction fan 7 are connected through a second air circulation pipe loop; a dehumidification fan 16 is provided on one side wall of the drying room 1, and a second suction fan 17 is provided between the drying room 1 and the evaporator 5.

[0025] Specifically, the air-type solar thermal collector box 6 includes an air inlet box 601, an air outlet box 602, and a straight-through vacuum thermal collector tube 603. The two ends of a number of straight-through vacuum thermal collector tubes 603 arranged at equal intervals are respectively connected to the air inlet box 601 and the air outlet box 602. The air inlet box 601 is connected to the outlet of the first suction fan 7, and the air outlet box 602 is connected to the drying room 1.

[0026] Specifically, a PLC controller 8 is provided on the outer wall of the drying room 1, and the PLC controller 8 is electrically connected to the compressor 2, the first suction fan 7, the dehumidification fan 16, and the second suction fan 17. The drying process is made intelligent and automated by the setting of the PLC controller 8. The dehumidification fan 16 discharges moisture in the drying room at intervals.

[0027] Specifically, taking into account the inconsistency in the temperature of the air heated by the air energy heat pump unit and the solar thermal collection unit, in order to make the temperature of the hot dry air entering the drying room 1 consistent, a Venturi mixer 10 is provided on the side wall of the drying room 1, the air outlet of the condenser 3 is connected to the inlet section of the Venturi mixer 10, the air outlet of the air outlet box 602 is connected to the throat of the Venturi mixer 10, and the outlet section of the Venturi mixer 10 is connected to the interior of the drying room 1.

[0028] Specifically, considering the presence of dust in the air in the drying room 1, long-term operation will affect the efficiency of the air energy heat pump unit and the solar thermal collection unit in heating the air. An air collecting box 11 is provided in the drying room 1, and an air filter 1101 is provided on the air inlet side of the air collecting box 11. The air collecting box 11 is respectively connected to the first suction fan 7 and the second suction fan 17, and a condensate discharge pipe is provided on the air outlet side of the evaporator 5.

[0029] Specifically, the first air circulation pipe section between the condenser 3 and the venturi mixer 10 is provided with a first temperature sensor 12 and a first gas flow regulating valve 14, and the second air circulation pipe section between the gas outlet box 602 and the venturi mixer 10 is provided with a second temperature sensor 13 and a second gas flow regulating valve 15, and the first temperature sensor 12, the first gas flow regulating valve 14, the second temperature sensor 13, and the second gas flow regulating valve 15 are all electrically connected to the PLC controller 8. The first temperature sensor 12 and the second temperature sensor 13 can detect the temperature of the hot dry air entering the drying room 1 from the air energy heat pump unit and the solar energy heat collection unit, respectively, and the opening adjustment of the first gas flow regulating valve 14 and the second gas flow regulating valve 15 can adjust the hot dry air flow ratio in the air energy heat pump unit and the solar energy heat collection unit entering the drying room 1.

[0030] Specifically, in order to make the hot dry air enter the drying room 1 more uniformly, the drying room 1 is provided with an air distribution device 9, which includes a mixing tube 901, an air distribution plate 902, and a partition 903. One end of the mixing tube 901 is connected to the outlet section of the venturi mixer 10, and the other end extends into the air distribution plate 902 and is connected to the bottom plate of the air distribution plate 902. A plurality of ventilation hole groups are axially provided on the side wall of the air outlet end of the mixing tube 901, and each ventilation hole group is composed of a plurality of first through holes 9011 in a circumferential array. A plurality of partitions 903 in a circumferential array divide the inner cavity of the air distribution plate 902 into a plurality of air distribution chambers, and a plurality of second through holes 9021 are provided on the bottom plate of the air distribution plate 902. The hot dry air in the air energy heat pump unit and the solar energy heat collection unit enters the air distribution device 9 after being mixed in the venturi mixer 10, and is diverted from the first through hole 9011 into the air distribution chamber, and then dispersed into the drying room 1 through the second through hole 9021.

[0031] The above description is a preferred embodiment of the present invention, which is used to explain the technical solution of the present invention. Those skilled in the art can make improvements within the spirit and principle of the present invention.

Claims

1. A solar-assisted air-energy heat pump dehumidification drying room, characterized in that: It includes drying room, air energy heat pump unit and solar thermal collection unit; The air energy heat pump unit comprises an evaporator, a compressor, a condenser, and a throttle valve connected in a loop in sequence, and a working medium exists in the loop; the evaporator, the condenser, and the drying room are connected in a loop through a first air circulation pipe; The solar heat collection unit comprises an air-type solar heat collection box and a first suction fan, and the air-type solar heat collection box, the drying room and the first suction fan are connected through a second air circulation pipe loop; A dehumidification fan is arranged on one side wall of the drying room, and a second suction fan is arranged between the drying room and the evaporator.

2. A solar-assisted air-energy heat pump dehumidification drying room according to claim 1, characterized in that: The air-type solar energy collector box comprises an air inlet box, an air outlet box, and a straight-through vacuum collector tube. The two ends of a number of straight-through vacuum collector tubes arranged at equal intervals are respectively connected to the air inlet box and the air outlet box. The air inlet box is connected to the outlet of the first suction fan, and the air outlet box is connected to the drying room.

3. A solar-assisted air-energy heat pump dehumidification drying room according to claim 2, characterized in that: A PLC controller is arranged on the outer wall of the drying room, and the PLC controller is electrically connected to the first suction fan, the second suction fan, the dehumidification fan and the compressor respectively.

4. A solar-assisted air-energy heat pump dehumidification drying room according to claim 1, characterized in that: A venturi mixer is provided on the side wall of the drying room, the air outlet of the condenser is connected to the inlet section of the venturi mixer, the air outlet of the air outlet box is connected to the throat of the venturi mixer, and the outlet section of the venturi mixer is connected to the inside of the drying room.

5. A solar-assisted air-energy heat pump dehumidification drying room according to claim 4, characterized in that: An air collecting box is provided in the drying room, an air filter is provided on the air inlet side of the air collecting box, the air collecting box is connected to the first suction fan and the second suction fan respectively, and a condensate discharge pipe is provided on the air outlet side of the evaporator.

6. A solar-assisted air-energy heat pump dehumidification drying room according to claim 5, characterized in that: A first temperature sensor and a first gas flow regulating valve are arranged on the first air circulation pipe section between the condenser and the venturi mixer, and a second temperature sensor and a second gas flow regulating valve are arranged on the second air circulation pipe section between the gas outlet box and the venturi mixer. The first temperature sensor, the first gas flow regulating valve, the second temperature sensor and the second gas flow regulating valve are all electrically connected to the PLC controller.

7. A solar-assisted air-energy heat pump dehumidification drying room according to claim 6, characterized in that: An air distribution device is provided in the drying room, and the air distribution device includes a mixing tube, an air distribution disk, and a partition. One end of the mixing tube is connected to the outlet section of the Venturi mixer, and the other end extends into the air distribution disk and is connected to the bottom plate of the air distribution disk. A plurality of ventilation hole groups are axially arranged on the side wall of the air outlet end of the mixing tube, and each ventilation hole group is composed of a plurality of first through holes in a circular array. A plurality of partitions in a circular array divide the inner cavity of the air distribution disk into a plurality of air distribution sub-cavities, and a plurality of second through holes are arranged on the bottom plate of the air distribution disk.

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