A variable frequency constant temperature and humidity granary air conditioning device

Abstract

The invention provides a variable frequency constant temperature and humidity air conditioning device for granaries, comprising a scroll compressor and a finned condenser, a liquid storage tank, a drying filter, a sight glass, a stop valve, a No. 1 solenoid valve, a thermal expansion valve, and an air handling mechanism which are sequentially connected to the scroll compressor through a No. 1 connecting pipe. The invention has a simple structure and complete functions. While keeping the low temperature of grains, the humidity of the air can be adjusted to achieve a constant temperature and humidity for the grains and protect the grains from losing water. Different constant temperature and humidity functions can be selected for different usage conditions. At the same time, when the unit is dehumidified, the relative humidity of the air is increased by utilizing supercooled heat, without consuming additional power, so that the overall operation of the device is more energy-efficient.

Description

Technical Field

[0001] The invention relates to the technical field of grain air conditioning, in particular to a variable frequency constant temperature and humidity granary special air conditioning device. Background Art

[0002] At present, low-temperature storage of grain has become a trend. Low-temperature storage is beneficial for improving grain quality, preventing pests, reducing storage losses, etc. The low-temperature grain storage equipment currently used mainly includes grain coolers for cooling grain piles and temperature control units for the upper space of the grain surface. Both of these devices have the function of cooling, but they do not effectively control the air humidity. Moreover, while refrigerating and cooling, they also remove moisture from the air, causing grain to lose water, which will lead to grain loss, reduce grain storage efficiency, and affect grain quality. Summary of the invention

[0003] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide a variable frequency constant temperature and humidity air-conditioning device specially designed for granaries, which has a simple structure and complete functions. It can adjust the humidity of the air while keeping the grain at a low temperature, thus solving the problem that low-temperature grain storage equipment cannot adjust the air humidity when cooling down, which easily causes grain dehydration.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A variable frequency constant temperature and humidity granary air conditioning device, comprising a scroll compressor, a finned condenser, a liquid storage tank, a drying filter, a liquid sight glass, a stop valve, a No. 1 solenoid valve, a thermal expansion valve, an air handling mechanism, and a control device, wherein the scroll compressor is connected to the finned condenser, the liquid storage tank, the drying filter, the liquid sight glass, the stop valve, the No. 1 solenoid valve, the thermal expansion valve, and the air handling mechanism in sequence through a No. 1 connecting pipe;

[0006] The air handling mechanism includes a shell and a finned evaporator, a finned subcooler, an ultrasonic humidifier, and an axial flow centrifugal blower which are sequentially arranged in the shell, one end of the shell is provided with an air outlet corresponding to the air outlet of the axial flow centrifugal blower, the other end of the shell is provided with an air inlet, a temperature and humidity sensor is provided at the air inlet, the finned evaporator is connected to the scroll compressor through a No. 2 connecting pipe, a No. 3 connecting pipe connected to the finned subcooler is provided on the No. 1 connecting pipe between the No. 1 solenoid valve and the stop valve, a No. 2 solenoid valve is provided on the No. 3 connecting pipe, and a No. 4 connecting pipe connected to the finned subcooler is provided on the No. 1 connecting pipe between the No. 1 solenoid valve and the thermal expansion valve;

[0007] The control device includes a control box and a PLC controller installed in the control box. The scroll compressor, the finned condenser, the No. 1 solenoid valve, the No. 2 solenoid valve, the thermal expansion valve, the temperature and humidity sensor, the finned evaporator, the finned subcooler, the ultrasonic humidifier, and the axial flow centrifugal blower are all electrically connected to the PLC controller.

[0008] Preferably, an axial flow fan is also provided on the finned condenser.

[0009] Preferably, a pressure controller is also provided on the No. 1 connecting pipe, and the pressure controller is electrically connected to the PLC controller.

[0010] Preferably, the No. 1 connecting pipe, the No. 2 connecting pipe, the No. 3 connecting pipe, and the No. 4 connecting pipe are all copper pipes.

[0011] The beneficial effects of the present invention are as follows: the present invention has a simple structure and complete functions, and while keeping the low temperature of grains, it can also adjust the humidity of the air, thereby achieving a constant temperature and humidity for the grains and protecting the grains from water loss, and different constant temperature and humidity functions can be selected for different usage conditions; at the same time, when the unit is dehumidifying, the method of increasing the relative humidity of the air by utilizing supercooling heat does not require additional power consumption, making the overall operation of the device more energy-efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 A schematic structural diagram of a variable frequency constant temperature and humidity air conditioning device specifically for a granary provided in an embodiment of the present invention.

[0014] Description of reference numerals:

[0015] 1-Scroll compressor, 2-Fin condenser, 3-Liquid storage tank, 4-Drying filter, 5-Sight glass, 6-Stop valve, 7-No. 1 solenoid valve, 8-Thermal expansion valve, 9-Shell, 10-Temperature and humidity sensor, 11-Fin evaporator, 12-Fin subcooler, 13-Ultrasonic humidifier, 14-Axial flow centrifugal fan, 15-Air inlet, 16-Air outlet, 17-Control box, 18-Axial flow fan, 19-No. 2 solenoid valve, 20-No. 1 connecting pipe, 21-No. 3 connecting pipe, 22-No. 4 connecting pipe, 23-No. 2 connecting pipe, 24-Pressure controller. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that in the description of the present invention, the terms "middle", "upper", "lower", "lateral", "inner", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0018] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] like Figure 1As shown, a variable frequency constant temperature and humidity granary air conditioning device includes a scroll compressor 1, a finned condenser 2, a liquid storage tank 3, a drying filter 4, a sight glass 5, a stop valve 6, a No. 1 solenoid valve 7, a thermal expansion valve 8, an air handling mechanism, and a control device. The scroll compressor 1 is connected to the finned condenser 2, the liquid storage tank 3, the drying filter 4, the sight glass 5, the stop valve 6, the No. 1 solenoid valve 7, the thermal expansion valve 8, and the air handling mechanism in sequence through a No. 1 connecting pipe 20. The scroll compressor 1 is used to generate high-temperature and high-pressure refrigerant gas. The finned condenser 2 is also provided with an axial flow fan 18. The finned The finned condenser 2 exchanges heat with the outdoor air through the axial flow fan 18, and converts the high-temperature and high-pressure refrigerant gas into medium-temperature and high-pressure refrigerant liquid after releasing heat. The liquid storage tank 3 is used to store the medium-temperature and high-pressure refrigerant liquid flowing out of the finned condenser 2. The drying filter 4 can dry and filter the moisture in the refrigerant flowing through to prevent ice blockage caused by excessive moisture in the refrigerant. The flow rate of the refrigerant and the moisture content of the refrigerant can be observed through the sight glass 5. The stop valve 6 is used to control the flow of the refrigerant liquid in the No. 1 connecting pipe. The thermal expansion valve 8 is used to transport the refrigerant into the finned evaporator 11 in the air handling mechanism.

[0020] The air handling mechanism includes a shell 9 and a finned evaporator 11, a finned subcooler 12, an ultrasonic humidifier 13, and an axial flow centrifugal blower 14 which are sequentially arranged in the shell 9. An air outlet 16 corresponding to the air outlet of the axial flow centrifugal blower 14 is provided at one end of the shell 9, and an air inlet 15 is provided at the other end of the shell 9. A temperature and humidity sensor 10 is provided at the air inlet 15. The finned evaporator 11 is connected to the scroll compressor 1 through a No. 2 connecting pipe 23 to transport the refrigerant liquid back to the scroll compressor 1, thereby forming a complete refrigerant cycle. A No. 3 connecting pipe 21 connected to the finned subcooler 12 is provided on the No. 1 connecting pipe 20 between the No. 1 solenoid valve 7 and the stop valve 6, and a No. 2 solenoid valve 19 is provided on the No. 3 connecting pipe 21. A No. 4 connecting pipe 22 connected to the finned subcooler 12 is provided on the No. 1 connecting pipe 20 between the No. 1 solenoid valve 7 and the thermal expansion valve 8;

[0021] The control device includes a control box 17 and a PLC controller installed in the control box 17. The scroll compressor 1, the finned condenser 2, the No. 1 solenoid valve 7, the No. 2 solenoid valve 19, the thermal expansion valve 8, the temperature and humidity sensor 10, the finned evaporator 11, the finned subcooler 12, the ultrasonic humidifier 13, and the axial flow centrifugal blower 14 are all electrically connected to the PLC controller, and the PLC controller can control the corresponding coordination of each component.

[0022] Furthermore, a pressure controller 24 is provided on the No. 1 connecting pipe 20. The pressure controller 24 is used to provide pressure into the No. 1 connecting pipe 20, thereby controlling the corresponding delivery of the refrigerant in each connecting pipe. The pressure controller 24 is electrically connected to the PLC controller, and the pressure controller 24 can be controlled by the PLC controller to perform corresponding work.

[0023] Furthermore, the No. 1 connecting pipe, the No. 2 connecting pipe, the No. 3 connecting pipe, and the No. 4 connecting pipe are all copper pipes.

[0024] When in use, the required temperature and humidity are set in the PLC controller. When the air in the granary needs to be cooled and dehumidified, the high-temperature and high-pressure refrigerant gas from the scroll compressor 1 enters the finned condenser 2 through the copper tube, and exchanges heat with the outdoor air through the axial flow fan 18 in the finned condenser 2. After releasing heat, it becomes a medium-temperature and high-pressure refrigerant liquid, and is stored in the liquid storage tank 3 through the copper tube. At the same time, the temperature and humidity sensor 10 detects the temperature and humidity of the air at the air inlet, and transmits the detected value to the PLC controller. If the detected temperature and humidity are higher than the set value of the PLC controller, the PLC controller controls the No. 2 electromagnetic The valve 19 is closed, the No. 1 solenoid valve 7 and the thermal expansion valve 8 are opened, and the refrigerant in the liquid storage tank 3 enters the finned evaporator 11 through the drying filter 4, the sight glass 5, the stop valve 6, and the thermal expansion valve 8 in sequence, and becomes a low-temperature and low-pressure refrigerant liquid. After absorbing the heat of the air from the granary, it becomes a low-temperature and low-pressure refrigerator gas and returns to the scroll compressor 1 through the No. 2 connecting pipe 23, completing the recycling of the refrigerant; the air from the granary enters the shell through the air inlet 15, and after being cooled and dehumidified by the finned evaporator 11, it is sent to the granary through the axial flow centrifugal blower 14, completing the refrigeration and dehumidification of the granary air;

[0025] When the detected temperature of the air in the granary is higher than the set value, and the humidity is lower than the set value, refrigeration and humidification are required, the high-temperature and high-pressure refrigerant gas from the scroll compressor 1 enters the finned condenser 2 through the copper tube, and exchanges heat with the outdoor air through the axial flow fan 18 in the finned condenser 2. After releasing heat, it becomes a medium-temperature and high-pressure refrigerant liquid, and is stored in the liquid storage tank 3 through the copper tube. At this time, the PLC controller controls the No. 1 solenoid valve 7 to close, the No. 2 solenoid valve 19 and the thermal expansion valve 8 to open, and the refrigerant in the liquid storage tank 3 passes through the drying filter 4, the sight glass 5, the stop valve 6, and the No. 2 solenoid valve 19 in turn into the finned subcooler 12. The finned subcooler 12 The refrigerant can be cooled by the low-temperature air flowing through the finned evaporator 11, thereby reducing the refrigerant temperature, which is beneficial to improving the refrigeration efficiency. The refrigerant in the finned subcooler 12 enters the finned evaporator 11 through the No. 4 connecting pipe 22 and the thermal expansion valve 8, and becomes a low-temperature and low-pressure refrigerant liquid. After absorbing the heat of the air from the granary, it becomes a low-temperature and low-pressure refrigerant gas and returns to the scroll compressor 1 through the No. 2 connecting pipe 23, completing the recycling of the refrigerant; the air from the granary passes through the finned evaporator 11 and then through the finned subcooler 12 to heat up, and is humidified by the ultrasonic humidifier 13, and is sent to the granary through the axial flow centrifugal blower to complete the refrigeration and humidification of the granary air.

[0026] The design of the present invention has a simple structure and complete functions. While keeping the low temperature of the grain, it can also adjust the humidity of the air, thereby maintaining a constant temperature and humidity for the grain and protecting the grain from water loss. Different constant temperature and humidity functions can be selected for different usage conditions. At the same time, when the unit dehumidifies, the relative humidity of the air is increased by utilizing supercooling heat, without consuming additional power, making the overall operation of the device more energy-efficient.

[0027] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A variable frequency constant temperature and humidity granary air conditioning device, It is characterized in that It includes a scroll compressor, a finned condenser, a liquid storage tank, a drying filter, a liquid sight glass, a stop valve, a No. 1 solenoid valve, a thermal expansion valve, an air handling mechanism, and a control device. The scroll compressor is connected with the finned condenser, the liquid storage tank, the drying filter, the liquid sight glass, the stop valve, the No. 1 solenoid valve, the thermal expansion valve, and the air handling mechanism in sequence through a No. 1 connecting pipe; The air handling mechanism includes a shell and a finned evaporator, a finned subcooler, an ultrasonic humidifier, and an axial flow centrifugal blower which are sequentially arranged in the shell, one end of the shell is provided with an air outlet corresponding to the air outlet of the axial flow centrifugal blower, the other end of the shell is provided with an air inlet, a temperature and humidity sensor is provided at the air inlet, the finned evaporator is connected to the scroll compressor through a No. 2 connecting pipe, a No. 3 connecting pipe connected to the finned subcooler is provided on the No. 1 connecting pipe between the No. 1 solenoid valve and the stop valve, a No. 2 solenoid valve is provided on the No. 3 connecting pipe, and a No. 4 connecting pipe connected to the finned subcooler is provided on the No. 1 connecting pipe between the No. 1 solenoid valve and the thermal expansion valve; The control device includes a control box and a PLC controller installed in the control box. The scroll compressor, the finned condenser, the No. 1 solenoid valve, the No. 2 solenoid valve, the thermal expansion valve, the temperature and humidity sensor, the finned evaporator, the finned subcooler, the ultrasonic humidifier, and the axial flow centrifugal blower are all electrically connected to the PLC controller.

2. A variable frequency constant temperature and humidity granary air conditioning device as claimed in claim 1, It is characterized in that An axial flow fan is also provided on the fin type condenser.

3. A variable frequency constant temperature and humidity granary air conditioning device as claimed in claim 1, It is characterized in that The No. 1 connecting pipe is also provided with a pressure controller, and the pressure controller is electrically connected to the PLC controller.

4. A variable frequency constant temperature and humidity granary air conditioning device as claimed in claim 1, It is characterized in that The No. 1 connecting pipe, the No. 2 connecting pipe, the No. 3 connecting pipe, and the No. 4 connecting pipe are all copper pipes.

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