CN211625757U - Special air conditioning device of frequency conversion constant temperature and humidity granary - Google Patents

Abstract

The utility model provides a special air conditioning device for a variable-frequency constant-temperature constant-humidity granary, which comprises a scroll compressor, a finned condenser, a liquid storage tank, a drying filter, a liquid viewing mirror, a stop valve, a solenoid valve, a thermostatic expansion valve and an air processing mechanism, wherein the scroll compressor is sequentially connected with the air conditioning device through a connecting pipe; the utility model has simple structure and complete functions, can adjust the humidity of air while keeping the low temperature of the grain, plays the role of constant temperature and humidity for the grain, protects the grain from water loss, and can select different functions of constant temperature and constant humidity according to different use conditions; meanwhile, when the unit dehumidifies, the method for improving the relative humidity of the air by using the supercooling heat does not need to consume extra power, so that the whole operation of the device is more energy-saving.

Description

A special air conditioner for variable frequency constant temperature and humidity granary

technical field

The utility model relates to the technical field of grain air conditioning, in particular to a special air conditioning device for a variable frequency constant temperature and humidity granary.

Background technique

At present, low-temperature grain storage has become a trend. Low-temperature storage is beneficial for improving grain quality, preventing pests, and reducing storage losses. The currently used low-temperature grain storage equipment mainly includes grain coolers for cooling grain piles and The temperature control unit of the upper space on the grain surface; both of these two types of equipment have the function of cooling, but neither can effectively control the air humidity, and at the same time of cooling and cooling, it also removes the moisture in the air, causing the water loss of the grain, which will lead to The loss of grain reduces the efficiency of grain storage and affects the quality of grain.

Utility model content

In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide a special air conditioner for a variable frequency constant temperature and humidity granary, which has a simple structure and complete functions. The equipment cannot adjust the air humidity when cooling down, and it is easy to cause the problem of food dehydration.

In order to solve the above-mentioned technical problems, the utility model adopts the following technical solutions:

A special air conditioner for variable frequency constant temperature and humidity granary, including scroll compressor, fin condenser, liquid storage tank, drying filter, sight glass, stop valve, No. 1 solenoid valve, thermal expansion valve, air treatment mechanism and control device, the scroll compressor is connected to the fin condenser, the liquid storage tank, the drying filter, the sight glass, the shut-off valve, The No. 1 solenoid valve, the thermal expansion valve, and the air handling mechanism communicate;

The air handling mechanism includes a casing and a fin-type evaporator, a fin-type subcooler, an ultrasonic humidifier, and an axial-flow centrifugal blower that are sequentially built in the casing. One end of the casing is provided with a The air outlet corresponding to the air outlet hole of the axial flow centrifugal blower, the other end of the casing is provided with an air inlet, the air inlet is provided with a temperature and humidity sensor, and the finned evaporator is connected through No. 2 The pipe is connected to the scroll compressor, and the No. 1 connecting pipe between the No. 1 solenoid valve and the shut-off valve is provided with a No. 3 connecting pipe that communicates with the finned subcooler. , the No. 3 connecting pipe is provided with a No. 2 solenoid valve, and the No. 1 connecting pipe between the No. 1 solenoid valve and the thermal expansion valve is provided with a No. 1 connecting pipe that communicates with the finned subcooler No. 4 connecting pipe;

The control device includes a control box and a PLC controller built in the control box, the scroll compressor, the fin condenser, the No. 1 solenoid valve, the No. 2 solenoid valve, the 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.

Preferably, an axial flow fan is further provided on the finned condenser.

Preferably, the No. 1 connecting pipe is further provided with a pressure controller, and the pressure controller is electrically connected with the PLC controller.

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.

The beneficial effects of the utility model are as follows: the structure is simple and the functions are complete, the humidity of the air can be adjusted while keeping the low temperature of the grain, the function of constant temperature and humidity for the grain is achieved, and the grain is protected from water loss, and the Different constant temperature and constant humidity functions can also be selected according to the usage conditions of the unit; at the same time, when the unit is dehumidified, the method of using supercooled heat to increase the relative humidity of the air does not require additional power consumption, making the overall operation of the device more energy-saving.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic structural diagram of a special air conditioner for a variable frequency constant temperature and humidity granary provided by an embodiment of the present invention.

Description of reference numbers:

1-Scroll compressor, 2-Fin condenser, 3-Liquid storage tank, 4-Filter drier, 5-Sight glass, 6-Stop valve, 7-No.1 solenoid valve, 8-Thermal expansion Valve, 9-shell, 10-temperature and humidity sensor, 11-finned evaporator, 12-finned subcooler, 13-ultrasonic humidifier, 14-axial flow centrifugal blower, 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 ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the implementations. example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that, in the description of the present utility model, the terms “middle”, “upper”, “lower”, “horizontal”, “inner”, etc. indicate directions or terms of positional relationship based on the directions shown in the drawings Or positional relationship, which is only for the convenience of description, rather than indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In addition, it should be noted that, in the description of the present invention, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be A fixed connection can also be a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

As shown in Figure 1, a special air conditioner for variable frequency constant temperature and humidity granary includes a scroll compressor 1, a fin condenser 2, a liquid storage tank 3, a drying filter 4, a sight glass 5, and a stop valve 6 , No. 1 solenoid valve 7, thermal expansion valve 8, air handling mechanism, control device, scroll compressor 1 is connected to fin condenser 2, liquid storage tank 3, drying filter 4, The sight glass 5, the cut-off valve 6, the No. 1 solenoid valve 7, the thermal expansion valve 8, and the air handling mechanism are connected. The scroll compressor 1 is used to generate high temperature and high pressure refrigerant gas, and the fin condenser 2 is also An axial flow fan 18 is provided, and the finned condenser 2 exchanges heat with the outdoor air through the axial flow fan 18. After releasing heat, the high temperature and high pressure refrigerant gas is turned into a medium temperature and high pressure refrigerant liquid. The liquid storage tank 3 is used for In order to store the medium temperature and high pressure refrigerant liquid flowing out from the fin condenser 2, the drying filter 4 can dry and filter the water in the refrigerant flowing through, so as to prevent the refrigerant from being blocked by ice due to excessive water content. The sight glass 5 can observe the flow of the refrigerant and display the moisture content of the refrigerant, the stop valve 6 is used to control the flow of the refrigerant liquid in the No. 1 connecting pipe, and the thermal expansion valve 8 is used to transport the refrigerant into the air handling mechanism. inside the fin evaporator 11 .

The air handling mechanism includes a casing 9 and a fin-type evaporator 11, a fin-type subcooler 12, an ultrasonic humidifier 13, and an axial flow centrifugal blower 14 that are sequentially built in the casing 9. One end of the casing 9 is provided with a The air outlet 16 corresponding to the air outlet of the axial flow centrifugal blower 14, the other end of the housing 9 is provided with an air inlet 16, the air inlet 16 is provided with a temperature and humidity sensor 10, and the finned evaporator 11 passes through two. The No. 1 connecting pipe 23 is connected to the scroll compressor 1, and the refrigerant liquid is transported back to the scroll compressor 1, thereby forming a complete refrigerant cycle. The No. 1 connection between the No. 1 solenoid valve 7 and the shut-off valve 6 The pipe 20 is provided with the No. 3 connecting pipe 22 which communicates with the finned subcooler 12, the No. 3 connecting pipe 22 is provided with the No. 2 solenoid valve 19, and the No. 1 solenoid valve 7 and the thermal expansion valve 8 are provided. The No. 4 connecting pipe 20 is provided with a No. 4 connecting pipe 23 that communicates with the finned subcooler 12;

The control device includes a control box 17 and a PLC controller built in the control box 17, a scroll compressor 1, a fin condenser 2, a No. 1 solenoid valve 7, a No. 2 solenoid valve 19, a thermal expansion valve 8, a temperature The 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 each component can be controlled by the PLC controller to perform corresponding operations. Cooperate.

Further, the No. 1 connecting pipe 20 is also provided with a pressure controller 24, and the pressure controller 24 is used to provide pressure to the No. 1 connecting pipe 20, so as to control the corresponding delivery of the refrigerant in each connecting pipe, and the pressure The controller 24 is electrically connected with the PLC controller, and the PLC controller can control the pressure controller 24 to perform corresponding work.

Further, 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.

When in use, set the required temperature and humidity 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 fin condenser 2 through the copper tube. , in the fin-type condenser 2, the heat is exchanged with the outdoor air through the axial flow fan 18, and after the heat is released, it becomes a medium-temperature and high-pressure refrigerant liquid, and is stored in the liquid storage tank 3 through the copper pipe, while the temperature and humidity sensor 10 Detect the temperature and humidity of the air at the air inlet, and transmit 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 solenoid valve 19 to close and the No. 1 solenoid valve to close. The 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 turn, and becomes a low temperature and low pressure. After absorbing the heat of the air from the granary, the refrigerant liquid becomes the low-temperature and low-pressure refrigerator gas and returns to the scroll compressor 1 through the No. 2 connecting pipe 23 to complete the circulation of the refrigerant; the air from the granary passes through The air inlet 15 enters the shell, and after cooling and dehumidifying through the fin evaporator 11, it is sent to the granary through the axial flow centrifugal blower 14 to complete the refrigeration and dehumidification of the air in the granary;

When the temperature detected in the air in the granary is higher than the set value, and the humidity is lower than the set value, when refrigeration and humidification are required, the high-temperature and high-pressure refrigerant gas from the scroll compressor 1 enters the finned type through the copper tube. The condenser 2, in the finned condenser 2, exchanges heat with the outdoor air through the axial flow fan 18, and after releasing heat, it becomes a medium-temperature and high-pressure refrigerant liquid, and is stored in the liquid storage tank 3 through a copper tube. 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, the No. 2 solenoid The valve 19 enters the finned subcooler 12, and the refrigerant in the finned subcooler 12 can be cooled by the low-temperature air flowing through the finned evaporator 11, thereby reducing the temperature of the refrigerant and improving the cooling 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 The refrigerant gas at low temperature and low pressure is returned to the scroll compressor 1 through the No. 2 connecting pipe 23 to complete the circulation of the refrigerant; the air from the granary passes through the fin evaporator 11 and then passes through the fin subcooler 12 When the temperature rises, the ultrasonic humidifier 13 humidifies, and sends it to the granary through the axial flow centrifugal blower to complete the refrigeration and humidification of the air in the granary.

The design of the utility model is simple in structure and complete in functions. While maintaining the low temperature of the grain, it can also adjust the humidity of the air, which can play the role of constant temperature and humidity on the grain, and protect the grain from water loss. Different constant temperature and constant humidity functions can also be selected in different situations; at the same time, when the unit is dehumidified, the method of using supercooled heat to increase the relative humidity of the air does not require additional power consumption, making the overall operation of the device more energy-saving.

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 utility model fall within the scope of the claims of the present utility model and their equivalents, the present utility model is also intended to include these modifications and variations.

Claims (4)

1. A special air conditioning device for a variable-frequency constant-temperature constant-humidity granary is characterized by comprising a scroll compressor, a finned condenser, a liquid storage tank, a drying filter, a liquid viewing mirror, a stop valve, a first electromagnetic valve, a thermal expansion valve, an air processing mechanism and a control device, wherein the scroll compressor is sequentially communicated with the finned condenser, the liquid storage tank, the drying filter, the liquid viewing mirror, the stop valve, the first electromagnetic valve, the thermal expansion valve and the air processing mechanism through a first connecting pipe;

the air treatment mechanism comprises a shell, and a finned evaporator, a finned subcooler, an ultrasonic humidifier and an axial flow centrifugal blower which are sequentially and internally arranged on the shell, wherein one end of the shell is provided with an air outlet corresponding to an air outlet of the axial flow centrifugal blower, the other end of the shell is provided with an air inlet, the air inlet is provided with a temperature and humidity sensor, the finned evaporator is connected with the scroll compressor through a second connecting pipe, a third connecting pipe communicated with the finned subcooler is arranged on the first connecting pipe between the first electromagnetic valve and the stop valve, a second electromagnetic valve is arranged on the third connecting pipe, and a fourth connecting pipe communicated with the finned subcooler is arranged on the first connecting pipe between the first electromagnetic valve and the thermostatic expansion valve;

the control device comprises a control box and a PLC (programmable logic controller) arranged in the control box, wherein the scroll compressor, the finned condenser, the first electromagnetic valve, the second electromagnetic 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 electrically connected with the PLC.

2. The air conditioning device special for the variable-frequency constant-temperature constant-humidity granary according to claim 1, wherein an axial flow fan is further arranged on the fin type condenser.

3. The air conditioning device special for the variable-frequency constant-temperature and constant-humidity granary as claimed in claim 1, wherein a pressure controller is further arranged on the first connecting pipe, and the pressure controller is electrically connected with the PLC controller.

4. The air conditioning device special for the variable-frequency constant-temperature and constant-humidity granary according to claim 1, wherein the first connecting pipe, the second connecting pipe, the third connecting pipe and the fourth connecting pipe are all copper pipes.

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