CN-117847978-B - Internal and external circulation integrated heat pump drying device and intelligent control system thereof

CN117847978BCN 117847978 BCN117847978 BCN 117847978BCN-117847978-B

Abstract

The invention discloses an internal and external circulation integrated heat pump drying device and an intelligent control system thereof, wherein the device comprises a condenser, an evaporator, a compressor, a throttle valve, first to fourth air volume regulators and a blower; when the intelligent control system works, the intelligent controller compares the working space return air temperature and humidity with the outdoor temperature and humidity and the target temperature and humidity, and switches the operation mode of the whole device by controlling each executing mechanism. The invention can utilize the energy of the outdoor air and recover the exhaust energy of the working space when reaching the target temperature and humidity, thereby realizing the improvement of the comprehensive utilization efficiency of energy.

Inventors

LI MINGCHEN
MING TINGZHEN
YE KAI
XIONG HANBING

Assignees

武汉理工大学

Dates

Publication Date: 20260505
Application Date: 20240202

Claims (10)

1. The internal and external circulation integrated heat pump drying device is characterized by comprising a condenser, an evaporator, a compressor, a throttle valve, a first air volume regulator, a second air volume regulator and a blower, wherein the condenser comprises a heat exchange coil, a first air passage and a second air passage, both ends of the second air passage are communicated with the outside, the inlet end of the second air passage is provided with the heat exchange fan, both ends of the second air passage are communicated with the outside, the inlet end of the second air passage is provided with the second heat exchange fan, a loop is formed between the heat exchange coils of the condenser and the evaporator through a refrigerant pipeline, the loop is provided with the compressor and the throttle valve, the first air volume regulator, the second air passage, the blower, a working space, the third air volume regulator and the first air passage and the fourth air passage of the evaporator are sequentially connected with each other through the air pipeline to form a loop, and the first air volume regulator, the second air regulator, the third air regulator and the fourth air regulator are respectively communicated with the outdoor air regulator through the first air passage, the third air regulator and the fourth air regulator, and the fourth air regulator are respectively communicated with the outdoor air regulator through the air pipeline.
2. An intelligent control system of an internal and external circulation integrated heat pump drying device as set forth in claim 1, wherein the intelligent control system comprises a return air temperature and humidity acquisition module for acquiring return air temperature and humidity of a working space, an outdoor temperature and humidity acquisition module for acquiring outdoor temperature and humidity and an intelligent controller, wherein the intelligent controller is respectively electrically connected with the return air temperature and humidity acquisition module, the outdoor temperature and humidity acquisition module and each actuator of the internal and external circulation integrated heat pump drying device, and when in operation, the intelligent controller compares the return air temperature and humidity of the working space with the outdoor temperature and humidity and the target temperature and humidity, and switches the operation mode of the whole device by controlling each actuator, so that the target temperature and humidity is achieved, and meanwhile, the energy of the outdoor air is utilized, and the exhaust energy of the working space is recovered.
3. The intelligent control system of an internal and external circulation integrated heat pump drying device according to claim 2, wherein the operation modes include an external circulation ventilation mode, an external circulation heating mode, an external circulation heat recovery heating mode, an internal circulation ventilation mode, an internal circulation heating mode, an internal circulation dehumidification heating mode and an internal circulation dehumidification cooling mode.
4. An intelligent control system for an internal and external circulation integrated heat pump drying apparatus as set forth in claim 3, wherein if the working space return air temperature and humidity are both less than the target temperature and humidity, both less than the outdoor temperature and humidity, and the working space return air enthalpy is less than the outdoor air enthalpy, the external circulation ventilation mode is operated such that the outdoor air passes through the first air volume regulator, the second air volume regulator, the blower, the working space, the third air volume regulator and the fourth air volume regulator in order and is discharged to the outside.
5. An intelligent control system of an internal and external circulation integrated heat pump drying device as set forth in claim 3, wherein if the working space return air temperature and humidity are both less than the target temperature and humidity, both less than the outdoor temperature and humidity, and the working space return air enthalpy is greater than the outdoor air enthalpy, the internal circulation heating mode is operated, wherein the second heat exchange fan and the compressor of the evaporator work, and the air sequentially passes through the first air volume regulator, the first air passage of the condenser, the second air volume regulator, the blower, the working space, the third air volume regulator and the fourth air volume regulator to realize internal circulation.
6. An intelligent control system of an internal and external circulation integrated heat pump drying device as set forth in claim 3, wherein if the working space return air temperature is less than the target temperature, the working space return air temperature and humidity are both less than the outdoor temperature and humidity, and the working space return air enthalpy is less than the outdoor air enthalpy, the external circulation heating mode is operated, wherein the second heat exchange fan and the compressor of the evaporator are operated, and the outdoor air is discharged to the outside after passing through the first air volume regulator, the first air passage of the condenser, the second air volume regulator, the blower, the working space, the third air volume regulator and the fourth air volume regulator in sequence.
7. An intelligent control system of an internal and external circulation integrated heat pump drying device as set forth in claim 3, wherein if the working space return air temperature is less than the target temperature, the working space return air humidity is greater than the target humidity, the working space return air humidity is less than the outdoor temperature and humidity, and the working space return air enthalpy is greater than the outdoor air enthalpy, the external circulation heat recovery heating mode is operated in which the first heat exchange fan and the compressor of the evaporator are operated and the outdoor air sequentially passes through the first air volume regulator, the first air passage of the condenser, the second air volume regulator, the blower, the working space, the third air volume regulator, the first air passage of the evaporator and the fourth air volume regulator and then is discharged to the outside.
8. An intelligent control system of an internal and external circulation integrated heat pump drying device according to claim 3, wherein if the working space return air temperature is less than the target temperature, the working space return air humidity is greater than the target humidity, the working space return air temperature is less than the outdoor temperature, and the working space return air humidity is greater than the outdoor humidity, the internal circulation dehumidification heating mode is operated, wherein the first heat exchange fan and the compressor of the evaporator work, and the air sequentially passes through the first air volume regulator, the first air volume regulator of the condenser, the second air volume regulator, the blower, the working space, the third air volume regulator, the first air volume regulator of the evaporator and the fourth air volume regulator to realize internal circulation.
9. The intelligent control system of the internal and external circulation integrated heat pump drying device according to claim 3, wherein if the working space return air temperature is higher than the target temperature and the working space return air humidity is lower than the target humidity, the internal circulation ventilation mode is operated, and the air sequentially passes through the second air volume regulator, the blower, the working space and the third air volume regulator to realize internal circulation.
10. An intelligent control system of an internal and external circulation integrated heat pump drying device as set forth in claim 3, wherein if the working space return air temperature and humidity are all greater than the target temperature and humidity, the internal circulation dehumidification cooling mode is operated, wherein the heat exchange fan of the condenser, the first heat exchange fan of the evaporator and the compressor work, and air sequentially passes through the first air volume regulator, the second air volume regulator, the blower, the working space, the third air volume regulator, the first air channel of the evaporator and the fourth air volume regulator to realize internal circulation.

Description

Internal and external circulation integrated heat pump drying device and intelligent control system thereof Technical Field The invention relates to a heat pump technology, in particular to an internal and external circulation integrated heat pump drying device and an intelligent control system thereof. Background The drying process is needed to prolong the storage period after a large number of crops are picked, heat energy is needed to be consumed in the crop drying process, the environment temperature is controlled to be gradually increased, the environment humidity is controlled to be gradually reduced in most of the crop drying processes, and the heat pump technology is widely applied to crop drying. The heat pump drying device for crop drying is commonly used in the market at present and comprises an inner circulation type heat pump drying device and an outer circulation type heat pump drying device, wherein the outer circulation type heat pump drying device is higher in energy consumption and insufficient in heating capacity when the outdoor environment temperature is low, the inner circulation type heat pump drying device is used for recycling the hot and humid exhaust gas of a drying chamber as a heat source, the hot exhaust gas is sent into the indoor circulation after being heated by a heat pump, the energy consumption is higher in the early drying stage, and the energy efficiency of the heat pump is lower when the humidity in the drying chamber is reduced in the later drying stage. Disclosure of Invention Aiming at the problems of the existing internal circulation type and external circulation type heat pump drying device, one of the purposes of the invention is to provide an internal and external circulation type integrated heat pump drying device, to provide a hardware foundation for utilizing the energy of the outdoor air and the exhaust energy of the recovery working space, and the other purpose is to provide an intelligent control system of the internal and external circulation type integrated heat pump drying device, to achieve the aim of achieving the temperature and humidity, and to utilize the energy of the outdoor air and the exhaust energy of the recovery working space, so as to achieve the improvement of the comprehensive utilization efficiency of energy. The technical scheme adopted by the invention is as follows: The application provides an internal and external circulation integrated heat pump drying device which comprises a condenser, an evaporator, a compressor, a throttle valve, a first air volume regulator, a second air volume regulator and a blower, wherein the condenser comprises a heat exchange coil, a first air passage and a second air passage, both ends of the second air passage are communicated with the outside, the inlet end of the second air passage is provided with the heat exchange coil, the evaporator comprises a first air passage and a second air passage, the inlet end of the first air passage is provided with the first heat exchange fan, both ends of the second air passage are communicated with the outside, the inlet end of the second air passage is provided with the second heat exchange fan, a loop is formed between the heat exchange coils of the condenser and the evaporator through a refrigerant pipeline, the loop is provided with the compressor and the throttle valve, the first air volume regulator, the second air passage, the blower, a working space, the third air passage of the evaporator and the fourth air passage are sequentially connected with each other through the air pipeline to form a loop, and the first air volume regulator, the second air regulator, the third air regulator and the fourth air regulator are respectively communicated with the outdoor air regulator through the first air passage and the fourth air regulator. The intelligent control system comprises a return air temperature and humidity acquisition module for acquiring the return air temperature and humidity of the working space, an outdoor temperature and humidity acquisition module for acquiring the outdoor temperature and humidity and an intelligent controller, wherein the intelligent controller is respectively and electrically connected with the return air temperature and humidity acquisition module, the outdoor temperature and humidity acquisition module and each actuating mechanism of the internal and external circulation integrated heat pump drying device, and when the intelligent control system works, the intelligent controller compares the return air temperature and humidity of the working space with the outdoor temperature and humidity with the target temperature and humidity, and switches the operation mode of the whole device by controlling each actuating mechanism, so that the target temperature and humidity is achieved, and meanwhile, the outdoor air energy is utilized, and the exhaust energy of the working space is recovered. Further, the operation modes include an external