CN215597665U - Total heat exchange temperature and humidity adjusting grain storage device - Google Patents
Total heat exchange temperature and humidity adjusting grain storage device Download PDFInfo
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- CN215597665U CN215597665U CN202121994057.XU CN202121994057U CN215597665U CN 215597665 U CN215597665 U CN 215597665U CN 202121994057 U CN202121994057 U CN 202121994057U CN 215597665 U CN215597665 U CN 215597665U
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Abstract
The utility model discloses a full heat exchange temperature and humidity regulating grain storage device, which comprises a heat pump circulating system, an air treatment system and a PLC (programmable logic controller) control system, wherein the PLC control system is electrically connected with the heat pump circulating system and the air treatment system respectively; the heat pump circulating system comprises a compressor, a condenser, a liquid storage device, a drying filter, an expansion valve and an evaporator which are sequentially connected in series to form a loop; the air treatment system comprises an air supply outlet, an air return inlet, a centrifugal fan and an air supply cavity, the air supply outlet and the air return inlet are respectively arranged at two ends of the air supply cavity, the centrifugal fan is arranged in the air supply cavity, a humidifier is arranged at the air inlet of the centrifugal fan, a total heat exchanger is arranged at the air outlet of the centrifugal fan, the air outlet of the centrifugal fan is in conduction connection with the air supply outlet, and an evaporator is arranged between the centrifugal fan and the air return inlet. The total heat exchange temperature and humidity regulating grain storage device has multiple functions of large-range high-precision constant-temperature constant-humidity air supply, dehumidification, humidification, refrigeration, heating and the like.
Description
Technical Field
The utility model relates to the field of grain storage, in particular to a total heat exchange temperature and humidity adjusting grain storage device.
Background
In the process of storing the grains in the grain depot, the problem of water loss (the water loss is about 1 to 2 percent) inevitably exists, the weight of the grains is reduced, and the economic benefit of a grain depot manager is directly lost. The low-temperature grain storage technology adopted at present has a certain water retention effect, but equipment mainly cools the temperature of grain piles and the temperature of surface layer space, most of the equipment does not have the humidity adjusting function, low-temperature drying air still can take away part of moisture when cooling the grain piles and the space, and long-time low-temperature storage also can reduce the moisture of grains. Meanwhile, when the grains are taken out of the warehouse, due to the fact that the temperature difference between the inside and the outside of the warehouse is large, low-temperature grains directly meet high-temperature air outside the warehouse and are prone to dewing on the surfaces of the grains, the grains are moldy and go bad, and the like.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model provides an efficient total heat exchange temperature and humidity adjusting grain storage device.
In order to achieve the purpose of the utility model, the technical scheme adopted by the utility model is as follows:
the full heat exchange temperature and humidity regulating grain storage device comprises a heat pump circulating system, an air treatment system and a PLC (programmable logic controller) control system, wherein the PLC control system is electrically connected with the heat pump circulating system and the air treatment system respectively; the heat pump circulating system comprises a compressor, a condenser, a liquid storage device, a drying filter, an expansion valve and an evaporator which are sequentially connected in series to form a loop; the air treatment system comprises an air supply outlet, an air return inlet, a centrifugal fan and an air supply cavity, the air supply outlet and the air return inlet are respectively arranged at two ends of the air supply cavity, the centrifugal fan is arranged in the air supply cavity, a humidifier is arranged at the air inlet of the centrifugal fan, a total heat exchanger is arranged at the air outlet, the air outlet of the centrifugal fan is in conduction connection with the air supply outlet, and an evaporator is arranged between the centrifugal fan and the air return inlet.
Further, the PLC control system comprises an air supply temperature and humidity sensor, an air inlet temperature and humidity sensor and an electric cabinet, the air supply temperature and humidity sensor is arranged between the total heat exchanger and the air supply outlet, the air inlet temperature and humidity sensor is arranged between the air return inlet and the evaporator, a PLC controller is arranged in the electric cabinet, and the air supply temperature and humidity sensor and the air inlet temperature and humidity sensor are electrically connected with the PLC controller.
Furthermore, the PLC control system further comprises an electronic remote water meter, the electronic remote water meter is connected with the humidifier, and the electronic remote water meter and the humidifier are both electrically connected with the PLC controller.
Further, PLC control system still includes pressure controller, pressure controller and PLC controller electric connection, and pressure controller includes low pressure controller and high pressure controller, and low pressure controller and high pressure controller set up induction port and the gas vent at the compressor respectively.
Further, an electric heater is arranged between the total heat exchanger and the centrifugal fan.
Furthermore, a first air channel which is communicated from left to right and a second air channel which is communicated from top to bottom are arranged on the total heat exchanger, the first air channel and the second air channel are not crossed with each other, two ends of the first air channel are respectively communicated with the centrifugal fan and the air supply opening, a bypass fan and a bypass air valve are respectively arranged at the upper end and the lower end of the second air channel, and a condensing fan corresponding to the condenser is arranged beside the bypass air valve.
Furthermore, the heat pump circulating system also comprises a four-way reversing valve and two one-way valve sets, wherein the air suction port of the compressor is in conducting connection with the evaporator and the air exhaust port of the compressor is in conducting connection with the condenser through the four-way reversing valve, and the two one-way valve sets are respectively arranged between the condenser and the liquid storage device and between the evaporator and the expansion valve.
Furthermore, a fresh air inlet is arranged beside the return air inlet, and a return air valve and a fresh air valve are respectively arranged on the return air inlet and the fresh air inlet.
The utility model has the beneficial effects that:
1. the total heat exchange temperature and humidity regulating grain storage device has multiple functions of large-range high-precision constant-temperature and humidity air supply, dehumidification, humidification, refrigeration, heating and the like, solves the problems of water loss, dewing and the like during grain low-temperature storage, and realizes low-temperature grain preservation and good quality.
2. The temperature and humidity sensor can detect temperature and humidity, and the PLC can automatically control the heat pump circulation system and the air treatment system.
3. The electronic remote water meter is convenient for automatically monitoring the humidification quantity of the humidifier.
4. The pressure of the suction gas and the exhaust gas of the compressor is controlled and monitored, and the protection effect is achieved.
5. When the temperature of the total heat exchanger is not enough to be adjusted, the electric heater is started to perform auxiliary adjustment, and accurate constant-temperature air supply is realized.
6. And cold air or hot air of the condenser is introduced into the second air channel of the total heat exchanger through the combined action of the condensing fan, the bypass fan and the bypass air valve, so that the air supply temperature of the first air channel is accurately adjusted.
7. The four-way reversing valve is arranged, so that the heat pump circulating system realizes the conversion between the refrigeration cycle and the heating cycle; the check valve set prevents the refrigerant from flowing backwards.
8. The arrangement of the return air inlet and the fresh air inlet enables the device to adjust the temperature and the humidity of the granary in an internal circulation mode, and fresh air can be introduced from the outside to adjust the temperature and the humidity of the granary, so that the requirements under various conditions are met.
Drawings
Fig. 1 is a structural diagram of a total heat exchange temperature and humidity regulating grain storage device.
The system comprises a condenser, a one-way valve group, a drying filter, an expansion valve, a liquid storage tank, a four-way reversing valve, a compressor, a pressure controller, a condensing fan, a condenser, an electronic remote water meter, a bypass air valve, a 12 air supply outlet, a 13 air supply temperature and humidity sensor, a 14 total heat exchanger, a 15 bypass fan, a 16 electric heater, a 17 centrifugal air supply blower, a 18 humidifier, a 19 evaporator, a 20 air inlet temperature and humidity sensor, a 21 air return air valve, a 22 air return opening, a 23 air supply cavity, a 24 fresh air valve, a 25 fresh air opening, a 26 electric cabinet, and a water storage tank.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the utility model as defined and defined in the appended claims, and all changes that come within the meaning and range of equivalency of the claims are to be embraced therein.
As shown in fig. 1, the total heat exchange temperature and humidity adjusting grain storage device comprises a heat pump circulation system, an air treatment system and a PLC control system, wherein the PLC control system is electrically connected with the heat pump circulation system and the air treatment system respectively.
The heat pump circulating system comprises a compressor 7, a condenser 1, a liquid storage device 5, a drying filter 3, an expansion valve 4 and an evaporator 19 which are sequentially connected in series to form a loop; the air suction port of the compressor 7 is in conduction connection with the evaporator 19 and the air exhaust port of the compressor 7 is in conduction connection with the condenser 1 through the four-way reversing valve 6, and the heat pump circulating system is enabled to realize the conversion between the refrigeration cycle and the heating cycle by adjusting the four-way reversing valve 6; check valve sets 2 are arranged between the condenser 1 and the liquid storage device 5 and between the evaporator 19 and the expansion valve 4, and the check valve sets are used for preventing the refrigerant from flowing backwards.
The air treatment system comprises an air supply outlet 12, an air return opening 22, a centrifugal fan 17 and an air supply cavity 23, wherein the air supply outlet 12 and the air return opening 22 are respectively arranged at two ends of the air supply cavity 23, the centrifugal fan 17 is arranged in the air supply cavity 23, a humidifier 18 is arranged at the air inlet of the centrifugal fan 17, a total heat exchanger 14 is arranged at the air outlet of the centrifugal fan 17, the air outlet of the centrifugal fan 17 is communicated with the air supply outlet 12, and an evaporator 19 is arranged between the centrifugal fan 17 and the air return opening 22; a fresh air inlet 25 is arranged beside the return air inlet 22, a return air valve 21 and a fresh air valve 24 are respectively arranged on the return air inlet 22 and the fresh air inlet 25, and the arrangement of the return air inlet 22 and the fresh air inlet 25 enables the device to adjust the temperature and the humidity of the granary in an internal circulation mode, and can also adjust the temperature and the humidity of the granary by introducing fresh air from the outside to meet the requirements of various conditions.
An electric heater 16 is arranged between the total heat exchanger 14 and the centrifugal fan 17, and when the temperature of the total heat exchanger 14 is not enough regulated, the electric heater 16 is started to carry out auxiliary regulation, so that accurate constant-temperature air supply is realized.
The total heat exchanger 14 is provided with a first air duct which is communicated from left to right and a second air duct which is communicated from top to bottom, the first air duct and the second air duct are not crossed with each other, two ends of the first air duct are respectively communicated with the centrifugal fan 17 and the air supply outlet 12, two ends of the second air duct are respectively provided with a bypass fan 15 and a bypass air valve 11, and a condensing fan 9 corresponding to the condenser 1 is arranged beside the bypass air valve 11. And cold air or hot air of the condenser 1 is introduced into the second air channel of the total heat exchanger 14 through the combined action of the condensing fan 9, the bypass fan 15 and the bypass air valve 11, so that the air supply temperature of the first air channel is accurately adjusted.
The PLC control system comprises an air supply temperature and humidity sensor 13, an air inlet temperature and humidity sensor 20, an electric cabinet 26, an electronic remote water meter 10 and a pressure controller 8, the air supply temperature and humidity sensor 13 is arranged between a total heat exchanger 14 and an air supply outlet 12, the air inlet temperature and humidity sensor 20 is arranged between an air return inlet 25 and an evaporator 19, the PLC controller is arranged in the electric cabinet 26, the electronic remote water meter 10 is connected with a humidifier 18, the electronic remote water meter 10 is convenient to automatically monitor humidification quantity, the pressure controller 8 comprises a low-voltage controller and a high-voltage controller, the low-voltage controller and the high-voltage controller are respectively arranged at an air suction port and an air exhaust port of a compressor 7, air suction and exhaust pressure of the compressor is controlled and monitored, and a protection effect is achieved.
The air supply temperature and humidity sensor 13, the air inlet temperature and humidity sensor 20, the electronic remote water meter 10, the humidifier 18, the pressure controller 8, the electric heater 16, the heat pump circulation system and the air processing system are all electrically connected with the PLC.
Specifically, the condenser 1 of the scheme adopts a finned condenser, the evaporator 19 adopts a finned evaporator, the total heat exchanger 14 adopts a cross-flow finned total heat exchanger, the expansion valve 4 adopts a thermal expansion valve, and the centrifugal fan 17 adopts a variable-frequency centrifugal fan, so that the variable-air-volume regulation requirement can be realized by regulating the rotating speed of the fan through a PLC (programmable logic controller); the humidifier 18 is an ultrasonic humidifier, and the humidity of the supplied air can be constantly adjusted by a PLC controller.
When the grain is stored at low temperature, if the grain moisture is high and the grain stack needs to be cooled and water-preserved or water-reduced, the temperature and humidity are controlled by the PLC controller, when the granary is provided with an air return duct, the heat preservation air pipe is connected with the air return opening 22 and the air return duct of the granary, and the air supply opening 12 is connected with the air duct of the granary; when the granary has no return air duct, a corresponding fresh air mode is selected, namely, a fresh air valve 24 on a fresh air port 25 is opened, the four-way reversing valve 6 is adjusted according to the required temperature and humidity, so that the heat pump circulating system is in a refrigeration mode, return air or fresh air in the granary sequentially passes through the return air port 22 or the fresh air port 25, the evaporator 19, the centrifugal fan 17, the electric heater 16, the total heat exchanger 14 and the air supply port 12, after the evaporator 19 is cooled and dehumidified, part of condensed hot air in the condenser 1 is bypassed into the total heat exchanger 14 through the operation control of the bypass air valve 11 and the bypass fan 15, the air supply temperature is adjusted, and the air supply humidity is adjusted by opening the humidifier 18. Finally, the ventilation completion condition is judged through the detection of the air supply temperature and humidity sensor 13 and the air inlet temperature and humidity sensor 20 (when air return occurs), so that the purposes of temperature reduction, water retention or precipitation are achieved.
When grains are taken out of a warehouse, due to the fact that indoor and outdoor temperature difference is large, condensation on the surfaces of the grains can be caused when the grains are taken out of the warehouse directly, at the moment, the grain pile needs to be heated and tempered properly, the grains are heated and water-retaining and ventilating are conducted, temperature and humidity are controlled through a PLC, a four-way reversing valve 6 is adjusted according to the required temperature and humidity, a heat pump circulating system is enabled to be in a heating mode, return air or fresh air in the warehouse sequentially passes through a return air inlet 22 or a fresh air inlet 25, an evaporator 19, a centrifugal fan 17, an electric heater 16, a total heat exchanger 14 and an air supply outlet 12 to heat the air, operation control is conducted through a bypass air valve 11 and a bypass fan 15, part of cold air of a condenser 1 (used as the evaporator at the moment) is bypassed to enter the total heat exchanger 14, air supply temperature is adjusted, and air supply humidity is adjusted by opening a humidifier 18. Finally, the ventilation completion condition is judged through the detection of the air supply temperature and humidity sensor 13 and the air inlet temperature and humidity sensor 20 (when air return occurs), so that the purposes of temperature rise and tempering are achieved, and the grain ex-warehouse tempering function is realized.
The total heat exchange temperature and humidity regulating grain storage device has multiple functions of large-range high-precision constant-temperature and humidity air supply, dehumidification, humidification, refrigeration, heating and the like, solves the problems of water loss, dewing and the like during grain low-temperature storage, and realizes low-temperature grain preservation and good quality.
Claims (8)
1. A full heat exchange temperature and humidity regulating grain storage device is characterized by comprising a heat pump circulating system, an air treatment system and a PLC control system, wherein the PLC control system is electrically connected with the heat pump circulating system and the air treatment system respectively;
the heat pump circulating system comprises a compressor (7), a condenser (1), a liquid storage device (5), a drying filter (3), an expansion valve (4) and an evaporator (19) which are sequentially connected in series to form a loop;
the air treatment system comprises an air supply outlet (12), an air return opening (22), a centrifugal fan (17) and an air supply cavity (23), wherein the air supply outlet (12) and the air return opening (22) are respectively arranged at two ends of the air supply cavity (23), the centrifugal fan (17) is arranged in the air supply cavity (23), a humidifier (18) is arranged at the air inlet of the centrifugal fan (17), a full heat exchanger (14) is arranged at the air outlet, the air outlet of the centrifugal fan (17) is in conduction connection with the air supply outlet (12), and an evaporator (19) is arranged between the centrifugal fan (17) and the air return opening (22).
2. The total heat exchange temperature and humidity adjusting grain storage device according to claim 1, wherein the PLC control system comprises an air supply temperature and humidity sensor (13), an air inlet temperature and humidity sensor (20) and an electric cabinet (26), the air supply temperature and humidity sensor (13) is arranged between the total heat exchanger (14) and the air supply outlet (12), the air inlet temperature and humidity sensor (20) is arranged between the air return inlet (22) and the evaporator (19), a PLC controller is arranged in the electric cabinet (26), and the air supply temperature and humidity sensor (13) and the air inlet temperature and humidity sensor (20) are electrically connected with the PLC controller.
3. The total heat exchange temperature and humidity adjusting grain storage device as claimed in claim 2, wherein the PLC control system further comprises an electronic remote water meter (10), the electronic remote water meter (10) is connected with a humidifier (18), and both the electronic remote water meter (10) and the humidifier (18) are electrically connected with the PLC controller.
4. The total heat exchange temperature and humidity adjusting grain storage device as claimed in claim 3, wherein the PLC control system further comprises a pressure controller (8), the pressure controller (8) is electrically connected with the PLC controller, the pressure controller (8) comprises a low pressure controller and a high pressure controller, and the low pressure controller and the high pressure controller are respectively arranged at an air suction port and an air exhaust port of the compressor (7).
5. The total heat exchange temperature and humidity adjusting grain storage device as claimed in claim 1, wherein an electric heater (16) is arranged between the total heat exchanger (14) and the centrifugal fan (17).
6. The total heat exchange temperature and humidity adjusting grain storage device according to claim 5, wherein a first air duct which is communicated from left to right and a second air duct which is communicated from top to bottom are arranged on the total heat exchanger (14), the first air duct and the second air duct are not crossed with each other, two ends of the first air duct are respectively communicated with the centrifugal fan (17) and the air supply outlet (12), two ends of the second air duct are respectively provided with the bypass fan (15) and the bypass air valve (11), and the condensing fan (9) corresponding to the condenser (1) is arranged beside the bypass air valve (11).
7. The total heat exchange temperature and humidity adjusting grain storage device according to claim 1, wherein the heat pump circulating system further comprises a four-way reversing valve (6) and two one-way valve banks (2), a connection between an air suction port of the compressor (7) and the evaporator (19) and between an air exhaust port of the compressor (7) and the condenser (1) is established through the four-way reversing valve (6), and the two one-way valve banks (2) are respectively arranged between the condenser (1) and the liquid reservoir (5) and between the evaporator (19) and the expansion valve (4).
8. The total heat exchange temperature and humidity adjusting grain storage device as claimed in claim 1, wherein a fresh air inlet (25) is arranged beside the return air inlet (22), and the return air inlet (22) and the fresh air inlet (25) are respectively provided with a return air valve (21) and a fresh air valve (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121994057.XU CN215597665U (en) | 2021-08-23 | 2021-08-23 | Total heat exchange temperature and humidity adjusting grain storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121994057.XU CN215597665U (en) | 2021-08-23 | 2021-08-23 | Total heat exchange temperature and humidity adjusting grain storage device |
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| Publication Number | Publication Date |
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| CN215597665U true CN215597665U (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121994057.XU Active CN215597665U (en) | 2021-08-23 | 2021-08-23 | Total heat exchange temperature and humidity adjusting grain storage device |
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| CN (1) | CN215597665U (en) |
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2021
- 2021-08-23 CN CN202121994057.XU patent/CN215597665U/en active Active
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