Novel CO2 refrigeration air cooler and heat recovery drying control method thereof

Abstract

The invention belongs to the technical field of air cooler equipment, and discloses a novel CO2 refrigeration air cooler and a heat recovery drying control method thereof.The novel CO2 refrigeration air cooler comprises a shell, a shutter ventilation window is fixedly connected to the outer side of the shell, and a refrigerant inlet pipe is fixedly connected to the top of the shell; the side, close to the shell, of the refrigerant inlet pipe is fixedly connected with a heat exchange pipe. The flow turbulence of a refrigerant in the heat exchange tube is improved through the annular convex ribs in the heat exchange tube, and a flow and heat transfer boundary layer is destroyed, so that the heat exchange efficiency is improved. The first axial flow fan upwards exhausts hot air to enter the dehumidifying and heating section, the temperature and humidity of the hot air are detected through a sensor and compared with set values to control electric heating and judge the working state of a drying piece, air dehumidifying and heating treatment is achieved, and the treated air enters the drying chamber to conduct drying treatment on materials. According to the automatic control method, precise regulation and control of heat recovery of the air cooler are achieved, and energy consumption is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of air cooler equipment, and in particular relates to a novel CO2 refrigeration air cooler and a heat recovery and drying control method thereof. Background Art

[0002] An air cooler is a heat exchange device that uses ambient air as a cooling medium. It is mainly used to cool or condense high-temperature process fluids. The air cooler only relies on the sensible heat of the air temperature rise to exchange heat, and relies on the forced circulation of heat exchange tubes and fans to enhance heat transfer. It is simple to operate and easy to use. Because the ambient air needs to contact the outside of the air cooler heat exchange tube, it can take away the heat of the refrigerant inside the heat exchange tube. The contact area between the ambient air and the outside of the heat exchange tube is small, resulting in poor heat exchange efficiency of the heat exchange tube, thereby increasing operating costs.

[0003] Improving the heat transfer coefficient of the heat transfer tube for CO2 refrigerant is an effective way to solve the above problems, among which the internal and external structure of the heat transfer tube is the main factor affecting the heat transfer efficiency.

[0004] According to CN202323229207.X, a corrugated tube heat exchanger is designed by changing the tube wall structure. By changing the internal and external structures of the tube, transverse ridges are formed. Due to the change in the size of the cross-sectional area, the mixing and rotation of the fluid will be increased, thereby increasing the turbulent state of the hot fluid, avoiding the single flow state of the fluid, and improving the heat exchange efficiency during use. The above patent mentions that the heat transfer coefficient outside the tube is increased by changing the outer wall structure of the tube. The heat transfer coefficient of the outer wall of the heat exchange tube of the air cooler of this patent is slightly increased, and it is not suitable for outer fins. Therefore, this patent uses an annular fin reinforcement structure inside the heat exchange tube and an outer wall fin to enhance the heat transfer method.

[0005] In this context, according to the characteristics that changes in the heat transfer tube wall structure affect the CO2 heat transfer coefficient, this patent starts with the internal structure of the heat transfer tube, uses inner annular fins to enhance the heat exchange inside the heat transfer tube, and combines the tube outer jacket fin design to improve the heat exchange effect between the heat transfer tube and the air. Summary of the invention

[0006] The object of the present invention is to provide a novel CO2 refrigeration air cooler and a heat recovery and drying control method thereof to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a new type of air cooler equipment for a CO2 refrigeration system, comprising an outer shell, the inner and outer sides of the outer shell are fixedly connected with louvered ventilation windows, the top of the outer shell is fixedly connected with a refrigerant inlet pipe, the side of the refrigerant inlet pipe close to the outer shell is fixedly connected with a heat exchange tube, the outer surface of the heat exchange tube is covered with square fins for enhanced heat exchange, the inside of the heat exchange tube is provided with an annular raised rib, the end of the heat exchange tube away from the refrigerant inlet pipe passes through the outer shell and is fixedly connected with a refrigerant discharge pipe, the top of the outer shell is fixedly connected with an axial flow fan, and the top of the outer shell is fixedly connected with a guide air duct.

[0008] Preferably, the top of the guide air duct is fixedly connected to a soft air duct, the top of the soft air duct is fixedly connected to an air supply duct, the side of the air supply duct close to the soft air duct is fixedly connected to a temperature and humidity sensor 1, the upper and lower sides of the air supply duct are fixedly connected to slots, a placement frame is inserted in the slot, both sides of the placement frame are fixedly connected to air permeable nets, and the side of the air supply duct away from the temperature and humidity sensor 1 is fixedly connected to an axial flow fan 2.

[0009] Preferably, an electric heater is fixedly connected inside the air supply duct, a temperature and humidity sensor 2 is fixedly connected to the side of the air supply duct close to the axial flow fan 2, the temperature and humidity sensor 1 and the temperature and humidity sensor 2 pass through the air supply duct and are fixedly connected to a display, the bottom end of the air supply duct away from the soft air duct is fixedly connected to a drying chamber, the side of the drying chamber away from the outer shell is fixedly connected to an exhaust port, the top of the drying chamber is fixedly connected to a return pipe, and the end of the return pipe away from the drying chamber is fixedly connected to the top of the air supply duct.

[0010] Preferably, the heat exchange tube as a whole presents a repeated spiral shape, the heat exchange tube is located above the louver ventilation window, and the axial flow fan is located above the heat exchange tube.

[0011] Preferably, a handle is fixedly connected to the front side of the placement frame, and the electric heater is located on a side of the temperature and humidity sensor 2 away from the axial flow fan 2.

[0012] Preferably, a connecting column is fixedly connected to the top end of the air supply pipe, and the air supply pipe is connected to the interior of the drying chamber.

[0013] Preferably, the top of the air guide duct is an inclined surface, and the topmost end of the air guide duct is fixedly connected to the soft air duct.

[0014] Preferably, there are two heat exchange tubes, wherein the air outlet of one of the heat exchange tubes is fixedly connected to the series pipe, and the air inlet of the other heat exchange tube is fixedly connected to the series pipe.

[0015] The new heat recovery and drying control method of the air cooler equipment of the CO2 refrigeration system is to input the hot refrigerant from the refrigerant inlet pipe into the heat exchange tube, and then start the axial flow fan to generate suction, so that the outside air passes through the louvered ventilation window into the shell. At this time, the hot refrigerant flowing in the heat exchange tube exchanges heat with the outside air through the heat exchange tube, the heat exchange-enhancing square fins, and the annular raised ribs, so that the hot refrigerant is cooled, and the cooled refrigerant is discharged from the refrigerant discharge pipe;

[0016] At the same time, the axial flow fan 2 is started to draw the hot air in the direction of the axial flow fan 2. Then, after the external air becomes hot, it goes upward along the guide air duct and the soft air duct into the air supply duct. At this time, the temperature and humidity of the hot air entering the air supply duct are detected by a pair of temperature and humidity sensors. Then, the air passes through the air permeable net and contacts the calcium chloride drying sheet in the placement frame, so that the hot air is dried by the calcium chloride drying sheet, and then the hot air is continued to be heated and dried by the electric heater.

[0017] Then the hot air after drying contacts the temperature and humidity sensor 2, and the humidity and temperature of the air after heat drying are detected again by the temperature and humidity sensor 2. Then the hot air enters the drying chamber to dry and heat the material, and then is discharged from the exhaust port. At the same time, a part of the hot air used for drying the material returns to the side of the air supply pipe close to the temperature and humidity sensor 1 along the return pipe for heat recovery and drying again.

[0018] When the temperature and humidity sensor 2 detects that the humidity of the hot air is high, it means that the calcium chloride desiccant in the placement frame needs to be replaced. At this time, the placement frame is pulled out for replacement and then inserted along the slot;

[0019] Heat recovery drying control method is as follows:

[0020] S1: Turn on the machine and initialize the drying module;

[0021] S2: Setting parameters: Drying temperature t s 、Humidity φ s , time controller ΔT, outlet air volume CFM S ;

[0022] S3: Obtain the initial parameters of hot air entering the module: temperature t0, humidity φ0;

[0023] S4: Calculate and determine whether the hot air humidity velocity parameter: φ0 is less than or equal to φ s If yes, it will go to the next step, otherwise the module starts the axial flow fan 2 and sets the power parameter of the axial flow fan 2 according to: P f To adjust the initial air volume entering the module, increase the entry of heat recovery dry air, and thus adjust the hot air humidity φ0;

[0024] S5: Calculate and determine the hot air temperature parameter: whether t0 is greater than or equal to t s If yes, go to the next step, otherwise the module starts 17 and sets the heating power parameters of the components: P H To adjust the initial entry temperature t0;

[0025] S6: Get the gas parameter temperature t of hot air entering the drying chamber h 、Humidity φ h , wind speed V h Under this condition, the drying module reacquires the initial hot air entry module parameters after working for ΔT time, and the gas enters the drying chamber to dry the material;

[0026] S7: Based on the wind speed parameters, the system calculates the air volume CFM h ;

[0027] S8: Calculate and determine the air volume parameters of the air outlet: outlet air volume CFM h Is it greater than the set air volume CFM? s If yes, part of the hot air at the drying chamber outlet is recovered and the remaining air is discharged; otherwise, most of the hot air at the drying chamber outlet is recovered and the remaining small part of the air is discharged; at the same time, the recovered air is subjected to gas dehumidification and drying treatment, and finally enters the module to be remixed with the new air;

[0028] S9: When the working ΔT time reaches the set value, the system module enters standby mode.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. The present invention inputs hot refrigerant into the heat exchange tube from the refrigerant inlet tube, and starts the axial flow fan to draw external air into the shell through the louvered ventilating window, and then the external air contacts the heat exchange tube and the heat exchange enhanced square fins. At this time, the hot refrigerant in the heat exchange tube exchanges heat with the external air through the annular raised ribs, the heat exchange tube, and the heat exchange enhanced square fins. Then the hot air is discharged upward through the axial flow fan, so that the contact area between the refrigerant flowing in the heat exchange tube and the external air is increased through the heat exchange enhanced square fins on the outside of the heat exchange tube and the annular raised ribs inside the heat exchange tube, thereby improving the heat exchange efficiency.

[0031] 2. The present invention converts external air into hot air after contacting the heat exchange tube, starts axial flow fan 2 to generate suction, and transports the hot air along the guide air duct to the soft air duct and then to the inside of the air supply duct along the soft air duct. First, the temperature and humidity of the current hot air are detected by temperature and humidity sensor 1, and then the hot air is dried by the calcium chloride drying sheet in the placement frame. When the calcium chloride drying sheet has been used for a long time, the placement frame is pulled out from the slot and the calcium chloride drying sheet in the placement frame can be replaced, thereby improving the drying efficiency of the hot air and avoiding excessive moisture in the hot air, which affects subsequent drying use.

[0032] 3. The present invention heats the hot air by starting the electric heater, and then detects the temperature and humidity after heating and drying through the temperature and humidity sensor 2, and then transports it to the drying room, so as to dry the materials in the drying room, thereby achieving the drying of the materials after the hot air is thermally dried, improving the energy utilization efficiency, and then part of the hot air is discharged from the exhaust port, and part of the air is transported along the return pipe to the air supply pipe for recycling. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 Schematic diagram of the CO2 system of the present invention;

[0034] Figure 2 It is a schematic diagram of the system structure connection of the present invention;

[0035] Figure 3 This is a schematic diagram of the series pipelines of the air cooler of the present invention;

[0036] Figure 4 It is a schematic diagram of the heat exchanger of the present invention;

[0037] Figure 5 This is a schematic diagram of the annular fin tube of the present invention;

[0038] Figure 6 It is a cross-sectional view of the heat exchange tube of the present invention;

[0039] Figure 7 It is a schematic diagram of the placement frame of the present invention;

[0040] Figure 8 It is a schematic diagram of the automatic control method of the present invention.

[0041] In the figure: 1. Shell; 2. Louvered ventilation window; 3. Refrigerant inlet pipe; 4. Heat exchange tube; 5. Square fins for enhanced heat exchange; 6. Annular raised ribs; 7. Refrigerant discharge pipe; 8. Axial flow fan 1; 9. Guide air duct; 10. Soft air duct; 11. Air supply duct; 12. Temperature and humidity sensor 1; 13. Display; 14. Slot; 15. Placement frame; 16. Breathable net; 17. Electric heater; 18. Axial flow fan 2; 19. Temperature and humidity sensor 2; 20. Drying chamber; 21. Exhaust port; 22. Return pipe; 23. Series pipe. DETAILED DESCRIPTION

[0042] 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.

[0043] like Figure 1 As shown, the embodiment of the present invention provides a novel air cooler device for a CO2 refrigeration system. The air cooler is located between the compressor and the gas-liquid separator components in the CO2 refrigeration system. The working principle of the air cooler is to cool and discharge the high-temperature and high-pressure CO2 refrigerant compressed by the compressor after heat exchange with air, enter the gas-liquid separator for gas-liquid separation, enter the evaporator for evaporation and heat absorption, and then enter the compressor again to complete the refrigeration cycle;

[0044] like Figures 2 to 6 As shown, an embodiment of the present invention provides a novel air cooler device for a CO2 refrigeration system. The present invention mentions that the novel air cooler device includes a shell 1, the inner and outer sides of the shell 1 are fixedly connected with louvered ventilating windows 2, the top of the shell 1 is fixedly connected with a refrigerant inlet pipe 3, the side of the refrigerant inlet pipe 3 close to the shell 1 is fixedly connected with a heat exchange pipe 4, the outer surface of the heat exchange pipe 4 is sheathed with square fins 5 for enhancing heat exchange, the inside of the heat exchange pipe 4 is provided with an annular raised rib 6, the end of the heat exchange pipe 4 away from the refrigerant inlet pipe 3 passes through the shell 1 and is fixedly connected with a refrigerant discharge pipe 7, the top of the shell 1 is fixedly connected with an axial flow fan 8, and the top of the shell 1 is fixedly connected with a guide air duct 9;

[0045] The working principle and beneficial effects of the above technical solution are as follows: by inputting the hot refrigerant into the heat exchange tube 4 from the refrigerant inlet tube 3, and starting the axial flow fan 8 to draw the external air into the shell 1 through the louvered ventilator 2, and then the external air contacts the heat exchange tube 4 and the enhanced heat exchange square fins 5. At this time, the hot refrigerant in the heat exchange tube 4 exchanges heat with the external air through the annular raised ribs 6, the heat exchange tube 4, and the enhanced heat exchange square fins 5. Then the hot air is discharged upward through the axial flow fan 8, thereby increasing the contact area between the refrigerant flowing in the heat exchange tube 4 and the external air through the enhanced heat exchange square fins 5 on the outside of the heat exchange tube 4 and the annular raised ribs 6 inside the heat exchange tube 4, thereby improving the heat exchange efficiency.

[0046] like Figure 2 As shown, in one embodiment, a soft air duct 10 is fixedly connected to the top of the guide air duct 9, an air supply duct 11 is fixedly connected to the top of the soft air duct 10, a temperature and humidity sensor 12 is fixedly connected to the side of the air supply duct 11 close to the soft air duct 10, slots 14 are fixedly connected to the upper and lower sides of the air supply duct 11, a placement frame 15 is inserted into the slot 14, and air permeable nets 16 are fixedly connected to the two sides of the placement frame 15, and an axial flow fan 18 is fixedly connected to the side of the air supply duct 11 away from the temperature and humidity sensor 12;

[0047] The working principle and beneficial effects of the above technical solution are as follows: the external air becomes hot air after contacting the heat exchange tube 4, and the axial flow fan 18 is started to generate suction, and the hot air is transported along the guide air duct 9 to the soft air duct 10 and then transported along the soft air duct 10 to the inside of the air supply duct 11. First, the temperature and humidity of the current hot air are detected by the temperature and humidity sensor 12, and then the hot air is dried by the calcium chloride drying sheet in the placement frame 15. After the calcium chloride drying sheet has been used for a long time, the placement frame 15 is pulled out from the slot 14, and the calcium chloride drying sheet in the placement frame 15 can be replaced, thereby improving the drying efficiency of the hot air and avoiding the hot air having too much moisture, which affects the subsequent drying use.

[0048] like Figure 2 As shown, in one embodiment, an electric heater 17 is fixedly connected inside the air supply pipe 11, a temperature and humidity sensor 19 is fixedly connected to one side of the air supply pipe 11 near the axial flow fan 18, the temperature and humidity sensor 12 and the temperature and humidity sensor 19 pass through the air supply pipe 11 and are fixedly connected to a display 13, a drying chamber 20 is fixedly connected to the bottom end of the air supply pipe 11 away from the soft air pipe 10, an exhaust port 21 is fixedly connected to the side of the drying chamber 20 away from the housing 1, a return pipe 22 is fixedly connected to the top of the drying chamber 20, and one end of the return pipe 22 away from the drying chamber 20 is fixedly connected to the top of the air supply pipe 11;

[0049] The working principle and beneficial effects of the above technical solution are as follows: the hot air is heated by starting the electric heater 17, and then the temperature and humidity after heating and drying are detected by the temperature and humidity sensor 19, and then it is transported to the drying chamber 20, so as to dry the material in the drying chamber 20, thereby achieving the drying of the material after the generated hot air is thermally dried, thereby improving the energy utilization efficiency, and then part of the hot air is discharged from the exhaust port 21, and part of the air is transported along the return pipe 22 to the inside of the air supply pipe 11 for recycling.

[0050] like Figure 2 As shown, in one embodiment, the heat exchange tube 4 is in a repetitive spiral shape as a whole, the heat exchange tube 4 is located above the louvered ventilating window 2, and the axial flow fan 8 is located above the heat exchange tube 4;

[0051] The working principle and beneficial effects of the above technical solution are as follows: the heat exchange tube 4 is in a repeated spiral shape as a whole, ensuring that the hot refrigerant is completely cooled after moving along the heat exchange tube 4, thereby avoiding the hot refrigerant not being cooled down. The heat exchange tube 4 is located above the louvered vent 2, so that the air enters the louvered vent 2 below the heat exchange tube 4 and then contacts the heat exchange tube 4, thereby increasing the air flow area on the outer wall of the heat exchange tube 4 through the louvered vent 2.

[0052] like Figure 2 As shown, in one embodiment, a handle is fixedly connected to the front side of the placement frame 15, and the electric heater 17 is located on the side of the temperature and humidity sensor 19 away from the axial flow fan 18;

[0053] The working principle and beneficial effects of the above technical solution are as follows: after the hot air is heated by the electric heater 17, the temperature and humidity are detected by the temperature and humidity sensor 19. When the humidity is detected to be high, the handle on the front side of the placement frame 15 allows the staff to hold the handle and pull the placement frame 15 out of the slot 14 to replace the calcium chloride drying sheet.

[0054] like Figure 2 As shown, in one embodiment, a connecting column is fixedly connected to the top of the air supply pipe 11, and the air supply pipe 11 is connected to the interior of the drying chamber 20;

[0055] The working principle and beneficial effect of the above technical solution are: through the connecting column at the top of the air supply pipe 11, the top of the air supply pipe 11 can be connected to the outside through the connecting column, thereby effectively supporting the air supply pipe 11.

[0056] like Figure 2 As shown, in one embodiment, the top of the guide air duct 9 is an inclined surface, and the top of the guide air duct 9 is fixedly connected to the soft air duct 10;

[0057] like Figure 3 As shown, there are two heat exchange tubes 4, wherein the air outlet of one heat exchange tube 4 is fixedly connected to the series pipe 23, and the air inlet of the other heat exchange tube 4 is fixedly connected to the series pipe 23;

[0058] The two air coolers are connected in series through a series pipe 23. The CO2 refrigerant temperature in the heat exchange pipe 4 connected to the connecting air duct is relatively high, and it is suitable to use its heat to heat the return air for material drying. The air temperature after heat exchange in the other air cooler is relatively low and is directly discharged to the external environment.

[0059] The working principle and beneficial effects of the above technical solution are as follows: the top of the guide air duct 9 is an inclined surface, so that the guide air duct 9 can guide the hot air, and the guided hot air is discharged upward along the soft air duct 10, so as to be reused.

[0060] A new type of heat recovery and drying control method for air cooler equipment of a CO2 refrigeration system is to input hot refrigerant from the refrigerant inlet pipe 3 into the heat exchange pipe 4, and then start the axial flow fan 8 to generate suction, and let the external air pass through the louvered ventilation window 2 into the shell 1. At this time, the hot refrigerant flowing in the heat exchange pipe 4 exchanges heat with the external air through the heat exchange pipe 4, the heat exchange-enhancing square fins 5, and the annular raised ribs 6, so that the hot refrigerant is cooled, and the cooled refrigerant is discharged from the refrigerant discharge pipe 7;

[0061] At the same time, the axial flow fan 18 is started to draw the hot air in the direction of the axial flow fan 18. Then, after the external air becomes hot, it goes upward along the guide air duct 9 and the soft air duct 10 into the air supply duct 11. At this time, the temperature and humidity of the hot air entering the air supply duct 11 are detected by the temperature and humidity sensor 12. Then, the air passes through the air permeable net 16 and contacts the calcium chloride drying sheet in the placement frame 15, so that the hot air is dried by the calcium chloride drying sheet, and then the hot air is continued to be heated and dried by the electric heater 17.

[0062] Then the hot air after drying contacts the temperature and humidity sensor 19, and the humidity and temperature of the air after heat drying are detected again by the temperature and humidity sensor 19. Then the hot air enters the drying chamber 20 to dry and heat the material, and then is discharged from the exhaust port 21. At the same time, a part of the hot air used for drying the material returns to the side of the air supply pipe 11 close to the temperature and humidity sensor 12 along the return pipe 22, and is subjected to heat recovery and drying treatment again.

[0063] When the temperature and humidity sensor 19 detects that the humidity of the hot air is high, it means that the calcium chloride drying sheet in the placement frame 15 needs to be replaced. At this time, the placement frame 15 is pulled out for replacement and then inserted into the slot 14;

[0064] like Figures 1 to 8As shown, the heat recovery drying control method is as follows:

[0065] S1: Turn on the machine and initialize the drying module;

[0066] S2: Setting parameters: Drying temperature t s 、Humidity φ s , time controller ΔT, outlet air volume CFM S ;

[0067] S3: Obtain the initial parameters of hot air entering the module: temperature t0, humidity φ0;

[0068] S4: Calculate and determine whether the hot air humidity velocity parameter: φ0 is less than or equal to φ s If yes, then go to the next step, otherwise the module starts the axial flow fan 18 and sets the power parameter of the axial flow fan 18 according to: P f To adjust the initial air volume entering the module, increase the entry of heat recovery dry air, and thus adjust the hot air humidity φ0;

[0069] S5: Calculate and determine the hot air temperature parameter: whether t0 is greater than or equal to t s If yes, go to the next step, otherwise the module starts 17 and sets the heating power parameters of the components: P H To adjust the initial entry temperature t0;

[0070] S6: Get the gas parameter temperature t of the hot air entering the drying chamber 20 h 、Humidity φ h , wind speed V h Under this condition, the drying module reacquires the initial hot air entry module parameters after working for ΔT time, and the gas enters the drying chamber 20 to dry the material;

[0071] S7: Based on the wind speed parameters, the system calculates the air volume CFM h ;

[0072] S8: Calculate and determine the air volume parameters of the air outlet: outlet air volume CFM h Is it greater than the set air volume CFM? s If yes, then part of the hot air at the outlet of the drying chamber 20 is recovered and the remaining air is discharged; otherwise, most of the hot air at the outlet of the drying chamber 20 is recovered and the remaining small part of the air is discharged; at the same time, the recovered air is subjected to gas dehumidification and drying treatment, and finally enters the module and is remixed with the new air;

[0073] S9: When the working ΔT time reaches the set value, the system module enters standby mode.

[0074] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0075] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A novel air cooler device for a CO2 refrigeration system, comprising a housing (1), characterized in that: The outer side of the shell (1) is fixedly connected to a louvered ventilation window (2), the top of the shell (1) is fixedly connected to a refrigerant inlet pipe (3), the side of the refrigerant inlet pipe (3) close to the shell (1) is fixedly connected to a heat exchange pipe (4), the outer surface of the heat exchange pipe (4) is covered with square fins (5) for enhancing heat exchange, the inside of the heat exchange pipe (4) is provided with an annular raised rib (6), the end of the heat exchange pipe (4) away from the refrigerant inlet pipe (3) passes through the shell (1) and is fixedly connected to a refrigerant discharge pipe (7), the top of the shell (1) is fixedly connected to an axial flow fan (8), and the top of the shell (1) is fixedly connected to a guide air duct (9).

2. A novel air cooler device for a CO2 refrigeration system according to claim 1, characterized in that: The top end of the guide air duct (9) is fixedly connected to a soft air duct (10), the top end of the soft air duct (10) is fixedly connected to an air supply duct (11), a temperature and humidity sensor (12) is fixedly connected to the side of the air supply duct (11) close to the soft air duct (10), slots (14) are fixedly connected to the upper and lower sides of the air supply duct (11), a placement frame (15) is inserted into the slot (14), and air permeable nets (16) are fixedly connected to the two sides of the placement frame (15), and an axial flow fan (18) is fixedly connected to the side of the air supply duct (11) away from the temperature and humidity sensor (12).

3. A novel air cooler device for a CO2 refrigeration system according to claim 2, characterized in that: An electric heater (17) is fixedly connected inside the air supply pipe (11); a temperature and humidity sensor (19) is fixedly connected to a side of the air supply pipe (11) close to the axial flow fan (18); the temperature and humidity sensor (12) and the temperature and humidity sensor (19) penetrate the air supply pipe (11) and are fixedly connected to a display (13); a bottom end of the air supply pipe (11) away from the soft air pipe (10) is fixedly connected to a drying chamber (20); a side of the drying chamber (20) away from the housing (1) is fixedly connected to an exhaust port (21); a top of the drying chamber (20) is fixedly connected to (22); an end of the return pipe (22) away from the drying chamber (20) is fixedly connected to an inlet of a fresh air louvered ventilation window (2) of an air cooler.

4. A novel air cooler device for a CO2 refrigeration system according to claim 3, characterized in that: The heat exchange tube (4) is in a repetitive spiral shape as a whole; the heat exchange tube (4) is located above the louvered ventilation window (2); and the axial flow fan (8) is located above the heat exchange tube (4).

5. A novel air cooler device for a CO2 refrigeration system according to claim 4, characterized in that: A handle is fixedly connected to the front side of the placement frame (15), and the electric heater (17) is located on a side of the second temperature and humidity sensor (19) away from the second axial flow fan (18).

6. A novel air cooler device for a CO2 refrigeration system according to claim 5, characterized in that: A connecting column is fixedly connected to the top end of the air supply pipe (11), and the air supply pipe (11) is connected to the interior of the drying chamber (20).

7. A novel air cooler device for a CO2 refrigeration system according to claim 6, characterized in that: The top of the flow-guiding air duct (9) is an inclined surface, and the topmost end of the flow-guiding air duct (9) is fixedly connected to the soft air duct (10).

8. A novel air cooler device for a CO2 refrigeration system according to claim 6, characterized in that: There are two heat exchange tubes (4), one of which has an air outlet fixedly connected to a series pipe (23), and the other has an air inlet fixedly connected to the series pipe (23).

9. A heat recovery and drying control method for a new air cooler device of a CO2 refrigeration system, characterized in that: The hot refrigerant is introduced into the heat exchange tube (4) from the refrigerant inlet tube (3), and then the axial flow fan (8) is started to generate suction, so that the external air passes through the louvered ventilation window (2) and enters the shell (1). At this time, the hot refrigerant flowing in the heat exchange tube (4) exchanges heat with the external air through the inner annular rib heat exchange tube (4) and the fins (5), so that the hot refrigerant is cooled, and the cooled refrigerant is discharged from the refrigerant discharge tube (7); At the same time, the axial flow fan 2 (18) is started to draw hot air in the direction of the axial flow fan 2 (18). Then, after the external air becomes hot, it flows upward along the guide air duct (9) and the soft air duct (10) into the air supply duct (11). At this time, the temperature and humidity of the hot air entering the air supply duct (11) are detected by the temperature and humidity sensor 1 (12). Then, the air passes through the air permeable net (16) and contacts the calcium chloride drying sheet in the placement frame (15), so that the hot air is dried by the calcium chloride drying sheet. Then, the hot air is further heated and dried by the electric heater (17). Then the dried hot air contacts the second temperature and humidity sensor (19), and the temperature and humidity of the dried hot air are detected by the second temperature and humidity sensor (19). Then the hot air enters the drying chamber (20) to dry the material. Part of the dried air is discharged from the exhaust port (21), while the other part of the hot air after drying the material is discharged along the return air duct (22). The end of the return air duct (22) away from the drying chamber (20) is fixedly connected to the inlet of the fresh air louver ventilation window (2) of the air cooler, and heat recovery and drying treatment is performed again. When the temperature and humidity sensor 2 (19) detects that the humidity of the hot air is high, it means that the calcium chloride drying sheet in the placement frame (15) needs to be replaced. At this time, the placement frame (15) is pulled out for replacement and then inserted into the slot (14). Heat recovery drying control method is as follows: S1: Turn on the machine and initialize the drying module; S2: Setting parameters: Drying temperature t s 、Humidity φ s , time controller ΔT, outlet air volume CFM S ; S3: Obtain the initial parameters of hot air entering the module: temperature t0, humidity φ0; S4: Calculate and determine whether the hot air humidity velocity parameter: φ0 is less than or equal to φ s If yes, the next step is entered. Otherwise, the module starts the axial flow fan 2 (18) and sets the power parameter P of the axial flow fan 2 (18). f To adjust the initial air volume entering the module, increase the entry of heat recovery dry air, and thus adjust the hot air humidity φ0; S5: Calculate and determine the hot air temperature parameter: whether t0 is greater than or equal to t s If yes, then go to the next step, otherwise the module starts 17 and sets the component heating power parameter P H To adjust the initial entry temperature t0; S6: Obtain the gas parameter temperature t of the hot air entering the drying chamber (20) h 、Humidity φ h , wind speed V h Under this condition, the drying module re-acquires the initial hot air entry module parameters after working for ΔT time, and the gas enters the drying chamber (20) to dry the material; S7: Based on the wind speed parameters, the system calculates the air volume CFM h ; S8: Calculate and determine the air volume parameters of the air outlet: outlet air volume CFM h Is it greater than the set air volume CFM? s If yes, part of the hot air at the outlet of the drying chamber (20) is recovered, and the remaining part of the air is discharged; otherwise, most of the hot air at the outlet of the drying chamber (20) is recovered, and the remaining small part of the air is discharged; at the same time, the recovered air is subjected to gas dehumidification and drying treatment, and finally enters the module and is remixed with the new air; S9: When the working ΔT time reaches the set value, the system module enters standby mode.

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