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Control method and control device of heat pump type dual-cycle hot air drying system

A technology of hot air drying and control device, which is applied in drying, heat pump, dryer and other directions to achieve the effect of improving energy efficiency, reducing energy consumption and ensuring reliability

Active Publication Date: 2017-05-10
JIANGSU TENESUN ELECTRICAL APPLIANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a heat pump double-circulation hot air drying system, which is used to solve the technical problems existing when the existing heat pump hot air drying system provides high temperature hot air

Method used

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  • Control method and control device of heat pump type dual-cycle hot air drying system
  • Control method and control device of heat pump type dual-cycle hot air drying system
  • Control method and control device of heat pump type dual-cycle hot air drying system

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Embodiment 1

[0071] An example of a multi-stage temperature control curve and temperature control parameter configuration interface is Figure 8 As shown, the multi-stage temperature control curve in this embodiment is a 10-stage heating curve. The control device 500 controls the double-cycle hot air drying system to realize intelligent and fully automatic operation by configuring the set temperature and temperature stabilization time of each time period. No manual manipulation is required.

[0072] according to Figure 6 As shown in the embodiment of the control method of the heat pump double-circulation hot air drying system of the present invention, the step S400 includes the following control operations:

[0073] S420: If the set temperature is Figure 8 For the 1st to 5th segments of the 10-segment heating curve shown, the set air outlet temperatures are 20°C, 25°C, 30°C, 35°C and 40°C respectively.

[0074] S440: If the set temperature is Figure 8 In the 6th and 7th segments of th...

Embodiment 2

[0078] The size of a tobacco drying room is: 8×2.8×2.2m, and the amount of tobacco leaves to be dried at one time is 350 rods, each rod is 30kg of tobacco leaves, totaling 10500kg. The variable-frequency variable-capacity heat pump hot air drying system is composed of a 6-hp fixed-frequency compressor 1-1 and a 6-hp variable-frequency compressor 1-2 connected in parallel. The maximum heating capacity is 50kW. The variable-frequency and variable-capacity connection structure of the unit is as follows: Figure 4 shown. For the temperature control curve of flue-cured tobacco process, see Figure 9 In the multi-stage drying process diagram shown, the heat consumption in each period is as follows Figure 10 shown. The control device 500 selects an appropriate operation mode through comparative analysis to achieve maximum operation efficiency.

[0079] according to Figure 7 As shown in the embodiment of the control method of the variable frequency and variable capacity heat pump...

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Abstract

The invention provides a control method and a control device of a heat pump type dual-cycle hot air drying system and relates to an air or gas supply or control device for drying a solid material or product, in particular to a control method and a control device of a heat pump type dual-cycle hot air drying system. The control method comprises the following steps that a temperature control parameter is configured, and a preset temperature control curve parameter is saved; air outlet temperature and drying room temperature and humidity are detected and monitored; the set temperature is dynamically adjusted according to a preset temperature control curve; a dual-cycle dynamic operating mode of the system is selected according to current set temperature. The control device utilizes a microprocessor to achieve program control, an inner cycle loop for large-volume circulation is established, condensing latent heat of a refrigerant is fully absorbed to improve basic air temperature, and high-temperature hot air is obtained through secondary heat exchange of an air supply circulation loop; the air outlet volume is automatically adjusted and controlled by adopting dual-path air volume to ensure the change demand for air outlet temperature and drying room temperature. The reliability of the product can be ensured, the unit energy efficiency can be also achieved, and the purpose of energy consumption is reduced.

Description

technical field [0001] The invention relates to an air or gas supply or control device for drying solid materials or products, in particular to a control method and control device for a heat pump type hot air drying system. Background technique [0002] At present, there are more and more places that need hot air drying in the market, such as tobacco drying, grain drying, medicinal materials drying, fruit and vegetable drying and other drying places. Coal furnaces, gas furnaces and electric furnaces are mainly used for drying. Coal and gas are non-renewable strategic energy sources, which are not the direction of national promotion. Electric furnaces are not suitable for mass promotion because of their high energy consumption and high operating costs. In the past, coal stoves were used to heat hot water in rural areas in the north. The country has comprehensively promoted the use of heat pumps instead of coal stoves in rural areas, which proves that heat pumps still have gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B21/08F26B21/10F25B30/02F25B30/06F25B41/00F25B41/40
CPCF25B30/02F25B30/06F26B21/002F26B21/08F26B21/10F25B41/40
Inventor 王玉军吴运运吴小网季忠海王颖王天舒杨奕
Owner JIANGSU TENESUN ELECTRICAL APPLIANCE
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