Cold and hot double-filling system

Abstract

The invention discloses a cold and hot double-filling system, and belongs to the technical field of filling. Comprising a filling unit, a main liquid inlet pipeline, a CO2 backpressure pipeline and a backflow pipeline. The main liquid inlet pipeline, the CO2 backpressure pipeline and the backflow pipeline are all connected with the filling unit through a gas-liquid distributor, the CO2 backpressure pipeline is connected with the backflow pipeline, and the backflow pipeline is connected with the main liquid inlet pipeline. The filling machine capable of achieving cold and hot filling is developed on the basis of a gas-containing filling machine, on the premise that normal gas-containing cold filling is met, one-key switching to a hot filling system can be achieved, the hot filling technology is considered on the basis of the isobaric filling principle, the functions of cylinder top backflow, cylinder inner wall high / low position backflow and liquid inlet pipe backflow are achieved, and the filling efficiency is improved. And stable backflow can be realized in the production process under the conditions of low temperature, transient shutdown and the like, and the temperature in the cylinder is ensured to meet the set production requirements.

Description

Technical Field

[0001] The invention relates to the technical field of filling, and in particular to a cold and hot dual filling system. Background Art

[0002] Conventional cold filling machines with built-in filling valves are based on the principle of isobaric filling and use the length of the long exhaust pipe to achieve consistent filling height. They are low-cost, stable, and reliable. Conventional hot filling machines, on the other hand, use the time of opening and closing the valve to fill the material at a constant volume, and require reflux during the filling process to ensure that the center temperature of the hot filling material remains above 85°C. Hot filling and cold filling cannot be completed using the same filling system. Two filling systems need to be prepared separately and equipped with corresponding hot filling valves and cold chain filling valves.

[0003] However, with the diversification of products and increasingly fierce market competition faced by customers, there is an urgent need for a multifunctional filling system that can fill more products. Summary of the invention

[0004] The purpose of the present invention is to provide a hot and cold dual filling system, aiming to at least solve the technical problems existing in the above-mentioned prior art. To achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A hot and cold dual filling system comprises a filling unit, a main liquid inlet pipeline, a CO2 back pressure pipeline and a return pipeline; the main liquid inlet pipeline, the CO2 back pressure pipeline and the return pipeline are all connected to the filling unit through a gas-liquid distributor, the CO2 back pressure pipeline is connected to the return pipeline, and the return pipeline is connected to the main liquid inlet pipeline.

[0007] As a further solution of the present invention: the filling unit includes a filling cylinder, the gas-liquid distributor is arranged at the bottom center of the filling cylinder, a plurality of filling valves are evenly distributed on the outer periphery of the bottom of the filling cylinder, and a No. 12 pneumatic butterfly valve and a No. 13 pneumatic butterfly valve are installed on the cylinder cover at the top of the filling cylinder.

[0008] As a further solution of the present invention: a No. 2 liquid level transmitter, a No. 2 pressure transmitter and a No. 3 temperature transmitter are also provided on the cylinder cover at the top of the filling cylinder, and a liquid inlet pipe and a return pipe are distributed on the inner wall of the filling cylinder. The return pipe is distributed in the upper and lower layers, and the reflux switch is controlled by a No. 1 pneumatic angle valve and a No. 2 pneumatic angle valve respectively. The reflux port of the No. 1 pneumatic angle valve is located below the breathing port of the filling valve, and the reflux port of the No. 2 pneumatic angle valve is flush with the bottom of the filling cylinder.

[0009] As a further solution of the present invention: the main liquid inlet pipeline includes a CIP liquid inlet pipeline, and a No. 1 pressure transmitter, a No. 1 temperature transmitter, a liquid inlet proportional valve, a liquid filter, a No. 3 pneumatic butterfly valve, a sampling valve and a No. 4 pneumatic butterfly valve are sequentially arranged in the liquid inlet direction of the CIP liquid inlet pipeline.

[0010] As a further solution of the present invention: the reflux pipeline includes a CIP reflux pipeline, and a No. 10 pneumatic butterfly valve, a No. 9 pneumatic butterfly valve, a No. 2 temperature transmitter, a reflux tank, a No. 5 pneumatic butterfly valve, a centrifugal pump and a No. 1 check valve are sequentially arranged in the return liquid direction of the CIP reflux pipeline, and a No. 1 liquid level transmitter and a No. 6 pneumatic butterfly valve are arranged on the top of the reflux tank.

[0011] As a further solution of the present invention: a No. 1 pneumatic butterfly valve and a No. 2 pneumatic butterfly valve are arranged at intervals on the pipeline connecting the reflux tank and the CIP liquid inlet pipeline, and the No. 1 pneumatic butterfly valve and the No. 2 pneumatic butterfly valve are located between the No. 1 temperature transmitter and the liquid inlet proportional valve.

[0012] As a further solution of the present invention: the CO2 back pressure pipeline includes a CO2 air inlet pipe, and the CO2 air inlet pipe is provided with a manual butterfly valve, a pressure reducing valve, a pre-filter, a fine filter, a No. 2 check valve, a carbon dioxide proportional valve, a No. 11 pneumatic butterfly valve and a reflux proportional valve in sequence on the air inlet direction.

[0013] As a further solution of the present invention: the CO2 intake pipeline is connected to the CIP return pipeline through a connecting pipe, one end of the connecting pipe is located between the No. 11 pneumatic butterfly valve and the reflux proportional valve, and the other end of the connecting pipe is located between the No. 2 temperature transmitter and the No. 9 pneumatic butterfly valve, and the No. 7 pneumatic butterfly valve and the No. 8 pneumatic butterfly valve are arranged on the connecting pipe, and the No. 7 pneumatic butterfly valve is also connected to the reflux tank.

[0014] As a further solution of the present invention: it also includes an electrical distributor, which is respectively connected to the gas-liquid distributor, the carbon dioxide proportional valve, the reflux proportional valve and the liquid inlet proportional valve.

[0015] Beneficial effects of the present invention:

[0016] The present invention develops a filling machine that can realize hot and cold filling on the basis of a carbonated filling machine. Under the premise of meeting normal carbonated cold filling, it can be switched to a hot filling system with one button. It is also based on the isobaric filling principle and takes the hot filling process into consideration. It has the functions of cylinder top reflux, cylinder inner wall high / low position reflux and liquid inlet pipe reflux. It can realize stable reflux under the conditions of production process, low temperature, short shutdown, etc., to ensure that the temperature in the cylinder meets the production setting requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the structure of a cold and hot dual filling system of the present invention;

[0019] Figure 2 It is a schematic cross-sectional view of the filling cylinder structure of the present invention.

[0020] In the figure: 1. No. 1 pressure transmitter; 2. No. 1 temperature transmitter; 3. No. 1 pneumatic butterfly valve; 4. No. 2 pneumatic butterfly valve; 5. Liquid inlet proportional valve; 6. Liquid filter; 7. No. 3 pneumatic butterfly valve; 8. Sampling valve; 9. No. 4 pneumatic butterfly valve; 10. No. 1 check valve; 11. Centrifugal pump; 12. No. 5 pneumatic butterfly valve; 13. Reflux tank; 14. No. 6 pneumatic butterfly valve; 15. No. 1 liquid level transmitter; 16. No. 7 pneumatic butterfly valve; 17. No. 2 temperature transmitter; 18. No. 8 pneumatic butterfly valve; 19. No. 9 pneumatic butterfly valve; 20. No. 10 pneumatic butterfly valve ; 21. Manual butterfly valve; 22. Pressure reducing valve; 23. Pre-filter; 24. Fine filter; 25. No. 2 non-return valve; 26. Carbon dioxide proportional valve; 27. No. 11 pneumatic butterfly valve; 28. Reflux proportional valve; 29. ​​Filling cylinder; 30. Cylinder cover; 31. Filling valve; 32. No. 2 liquid level transmitter; 33. No. 12 pneumatic butterfly valve; 34. No. 1 pneumatic angle valve; 35. No. 2 pneumatic angle valve; 36. Gas-liquid distributor; 37. Electrical distributor; 38. No. 13 pneumatic butterfly valve; 39. No. 2 pressure transmitter; 40. No. 3 temperature transmitter. DETAILED DESCRIPTION

[0021] 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.

[0022] In the description of the present invention, it should be understood that terms such as "up", "down", "left", "right", "front" and "back" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, and a specific direction structure and operation. Therefore, they should not be understood as limitations on the present invention.

[0023] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", etc. 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 or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] See also Figure 1 As shown, the embodiment of the present invention provides a hot and cold dual filling system, including a filling unit, a main liquid inlet pipeline, a CO2 back pressure pipeline and a return pipeline. The main liquid inlet pipeline, the CO2 back pressure pipeline and the return pipeline are all connected to the filling unit through a gas-liquid distributor 36, the CO2 back pressure pipeline is connected to the return pipeline, and the return pipeline is connected to the main liquid inlet pipeline.

[0025] See also Figure 2 As shown, in this embodiment, the filling unit includes a filling cylinder 29, a plurality of filling valves 31 are evenly distributed at the bottom of the filling cylinder 29, and a No. 12 pneumatic butterfly valve 33 and a No. 13 pneumatic butterfly valve 38 are installed on the cylinder cover 30 at the top of the filling cylinder 29, which are used to adjust the back pressure and cylinder pressure of the filling cylinder 29 respectively. The No. 13 pneumatic butterfly valve 38 also serves as a breathing port of the filling cylinder 29 when hot filling is full, and is used to accelerate the reflux speed. In addition, the No. 2 liquid level transmitter 32, the No. 2 pressure transmitter 39, and the No. 3 temperature transmitter 40 arranged on the cylinder cover 30 are all involved in the system control, and are used for the detection of cylinder pressure, reflux and liquid level. The inner wall of the filling cylinder 29 is provided with a liquid inlet pipe and a return pipe, wherein the return pipe is divided into upper and lower layers, and the return switch is controlled by the No. 1 pneumatic angle valve 34 and the No. 2 pneumatic angle valve 35. The return port of the No. 1 pneumatic angle valve 34 is located below the breathing port of the filling valve 31 to prevent the material liquid level from exceeding the breathing port during hot filling, affecting the return air of the exhaust pipe during the filling process, thereby affecting the filling liquid level. The return port of the No. 2 pneumatic angle valve 35 is located at the low point of the filling cylinder 29, flush with the bottom of the cylinder, and is mainly used to empty the hot filling material in the filling cylinder 29 to reduce material loss. There are several CIP pipes at the bottom of the filling cylinder 29, which are connected to the CIP and exhaust control valves of the filling valve 31, and are used for exhaust in the bottle and CIP cleaning. The gas-liquid distributor 36 is used to transport CO2 and materials, as well as CIP return liquid.

[0026] See also Figure 1As shown, in this embodiment, the main liquid inlet pipeline includes a CIP liquid inlet pipeline for conveying materials, and the CIP liquid inlet pipeline is provided with a No. 1 pressure transmitter 1, a No. 1 temperature transmitter 2, a liquid inlet proportional valve 5, a liquid filter 6, a No. 3 pneumatic butterfly valve 7, a sampling valve 8 and a No. 4 pneumatic butterfly valve 9 in the liquid inlet direction. The No. 1 pressure transmitter 1 is used to compare with the No. 2 pressure transmitter 39 to determine whether the liquid can be normally inlet, otherwise the liquid filter 6 will be damaged by reverse flow. Among them, the liquid filter 6 is used to prevent metal from entering the system, the No. 3 pneumatic butterfly valve 7 is used to close the main pipeline in the case of shutdown, the sampling valve 8 is used to sample and detect materials, and the No. 4 pneumatic butterfly valve 9 is used to empty the materials in the filling cylinder 29.

[0027] See also Figure 1 As shown, in this embodiment, the reflux pipeline includes a CIP reflux pipeline, and the CIP reflux pipeline is provided with a No. 10 pneumatic butterfly valve 20, a No. 9 pneumatic butterfly valve 19, a No. 2 temperature transmitter 17, a reflux tank 13, a No. 5 pneumatic butterfly valve 12, a centrifugal pump 11 and a No. 1 check valve 10 in the return direction of the CIP reflux pipeline. A No. 1 liquid level transmitter 15 and a No. 6 pneumatic butterfly valve 14 are provided on the top of the reflux tank 13. Among them, the No. 2 temperature transmitter 17 is used for hot filling reflux temperature control. When the temperature here reaches the set value, normal hot filling can be started. The No. 3 temperature transmitter 40 participates in temperature monitoring. When the No. 3 temperature transmitter 40 is lower than the set temperature, it is required to stop the bottle immediately and start the hot filling reflux action. The No. 5 pneumatic butterfly valve 12 is interlocked with the No. 1 liquid level transmitter 15 to control the reflux speed. The No. 1 one-way valve 10 is used to prevent the reflux liquid from flowing back when the No. 5 pneumatic butterfly valve 12 stops, causing damage to the No. 5 pneumatic butterfly valve 12. The centrifugal pump 11 is used to empty the liquid in the No. 6 pneumatic butterfly valve 14. The reflux tank 13 is used as the breathing port of the No. 6 pneumatic butterfly valve 14 during hot filling reflux.

[0028] Furthermore, a No. 1 pneumatic butterfly valve 3 and a No. 2 pneumatic butterfly valve 4 are arranged at intervals on the pipeline connecting the reflux tank 13 and the CIP liquid inlet pipeline, and the No. 1 pneumatic butterfly valve 3 and the No. 2 pneumatic butterfly valve 4 are located between the No. 1 temperature transmitter 2 and the liquid inlet proportional valve 5. When switching to the hot filling reflux mode, after filling the hot cylinder, the No. 1 temperature transmitter 2 is used to determine whether the temperature of the incoming material is normal. The temperature of the first wave of materials is relatively low, and the No. 2 pneumatic butterfly valve 4 is directly opened, and the materials flow back to the reflux tank 13. When the temperature and pressure are appropriate, they are allowed to enter the filling cylinder 29.

[0029] See also Figure 1As shown, in this embodiment, the CO2 back pressure pipeline includes a CO2 air inlet pipe, and a manual butterfly valve 21, a pressure reducing valve 22, a pre-filter 23, a fine filter 24, a No. 2 one-way valve 25, a carbon dioxide proportional valve 26, a No. 11 pneumatic butterfly valve 27 and a reflux proportional valve 28 are sequentially arranged on the air inlet direction of the CO2 air inlet pipe. The manual butterfly valve 21 is used to manually close the valve in an emergency. The pressure reducing valve 22 is used to control the intake pressure, which is about 0.5 bar greater than the back pressure and is used for back pressure control. The pre-filter 23 and the fine filter 24 are used to filter the CO2 gas. The No. 2 check valve 25 is mainly used to prevent the valve leakage during CIP pipeline cleaning, which causes the CIP pipeline cleaning liquid to enter the front section of the CO2 intake pipeline. The carbon dioxide proportional valve 26 is used to control the air pressure entering the filling cylinder 29, and is interlocked with the No. 13 pneumatic butterfly valve 38 and the No. 2 pressure transmitter 39 to ensure the pressure stability of the filling cylinder 29. The No. 11 pneumatic butterfly valve 27 is used for CIP pipeline cleaning to automatically close the CO2 intake pipeline. The reflux proportional valve 28 is interlocked with the No. 2 liquid level transmitter 32, the No. 1 pneumatic angle valve 34 and the No. 2 pneumatic angle valve 35 to control the reflux.

[0030] In addition, the CO2 inlet pipeline is connected to the CIP return pipeline through a connecting pipe, one end of the connecting pipe is located between the No. 11 pneumatic butterfly valve 27 and the return proportional valve 28, and the other end of the connecting pipe is located between the No. 2 temperature transmitter 17 and the No. 9 pneumatic butterfly valve 19. The No. 7 pneumatic butterfly valve 16 and the No. 8 pneumatic butterfly valve 18 are arranged on the connecting pipe, and the No. 7 pneumatic butterfly valve 16 is also connected to the reflux tank 13. The No. 7 pneumatic butterfly valve 16 is used to clean the inside of the tank using the cleaning ball in the reflux tank 13 at the beginning of cleaning.

[0031] Understandably, see Figure 1 As shown, the system is further provided with an electrical distributor 37, which is respectively connected to the gas-liquid distributor 36, the carbon dioxide proportional valve 26, the reflux proportional valve 28 and the liquid inlet proportional valve 5. The electrical distributor 37 is used to transmit electrical signals and compressed air.

[0032] Next, we will introduce two filling processes:

[0033] Air-cold filling process: pneumatic butterfly valve No. 2 4, pneumatic butterfly valve No. 4 9, pneumatic butterfly valve No. 7 16, pneumatic butterfly valve No. 8 18 and pneumatic butterfly valve No. 9 19, as well as pneumatic angle valve No. 1 34 and pneumatic angle valve No. 2 35 are closed, pneumatic butterfly valve No. 3 7, pneumatic butterfly valve No. 10 20, pneumatic butterfly valve No. 11 27 and pneumatic butterfly valve No. 12 33 are opened, the opening of the material is controlled by the liquid inlet proportional valve 5, and the opening of the liquid inlet proportional valve 5 is adjusted in real time according to the No. 2 liquid level transmitter 32 on the cylinder cover 30 to ensure the stability of the liquid level inside the filling cylinder 29. Similarly, the pressure of the filling cylinder 29 is set by the pressure reducing valve 22 on the CO2 inlet pipeline, the No. 11 pneumatic butterfly valve 27 and the reflux proportional valve 28 are fully opened, and the carbon dioxide proportional valve 26 controls the intake flow rate in combination with the cylinder pressure value fed back by the No. 2 pressure transmitter 39. When the pressure exceeds the set value, the carbon dioxide proportional valve 26 adjusts the opening, and the No. 13 pneumatic butterfly valve 38 opens to relieve pressure and coordinate the control of the pressure stability in the filling cylinder 29. It should be noted that there is a throttle hole on the exhaust pipeline of the No. 13 pneumatic butterfly valve 38 to prevent the pressure from being released too quickly. During the filling process, after bottle inlet, back pressure, filling, static, bottle outlet and purging, the high-pressure gas in the bottle needs to be slowly discharged during the bottle outlet stage, otherwise the direct bottle outlet will cause foaming and affect the consistency of the liquid level. After passing through the exhaust control valve of the filling valve 31, the high-pressure gas is discharged to the CIP pipeline, and then discharged to the atmosphere by the No. 10 pneumatic butterfly valve 20 on the CIP pipeline, or led to the location specified by the customer.

[0034] The non-gas hot filling process is divided into three situations:

[0035] (a) Liquid filling hot cylinder process: No. 1 pneumatic butterfly valve 3, No. 2 pneumatic butterfly valve 4, No. 4 pneumatic butterfly valve 9, centrifugal pump 11, No. 7 pneumatic butterfly valve 16, No. 9 pneumatic butterfly valve 19, No. 11 pneumatic butterfly valve 27, No. 13 pneumatic butterfly valve 38, as well as No. 1 pneumatic angle valve 34 and No. 2 pneumatic angle valve 35 are closed, No. 3 pneumatic butterfly valve 7, No. 6 pneumatic butterfly valve 14, No. 8 pneumatic butterfly valve 18, No. 10 pneumatic butterfly valve 20 are opened, the liquid inlet proportional valve 5 and the reflux proportional valve 28 are adjusted to the maximum opening, the filling cylinder 29 is full and refluxed, and the No. 5 pneumatic butterfly valve 12 is opened for reflux. Until the temperatures of temperature transmitter No. 2 17 and level transmitter No. 2 32 reach the set temperature at the same time, for example 85°C, then pneumatic butterfly valve No. 2 4, pneumatic angle valve No. 1 34, pneumatic angle valve No. 2 35 and pneumatic butterfly valve No. 13 38 are opened, pneumatic butterfly valve No. 12 33 is closed, the opening of liquid inlet proportional valve 5 is reduced to a fixed value A, and the liquid level in the filling cylinder 29 begins to drop until the liquid level drops below the breathing port of the filling valve 31. Then, pneumatic angle valve No. 2 35 is closed, and the opening of reflux proportional valve 28 is dynamically adjusted to ensure the stability of the liquid level, indicating that the bottle can be filled normally.

[0036] (b) Continuous production process: After the bottle is put into production, the opening of the liquid inlet proportional valve 5 is adjusted to a fixed value B, where B>A, and the No. 2 pneumatic butterfly valve 4 and the No. 13 pneumatic butterfly valve 38 are closed. Because the total flow rate of the material sent by UHT is slightly larger than the amount required for production, only a small part of it flows back to the reflux tank 13 through the No. 1 pneumatic angle valve 34. The No. 5 pneumatic butterfly valve 12 operates continuously at a low frequency. The reflux proportional valve 28 still dynamically adjusts the opening according to the production bottle feeding situation and the No. 2 liquid level transmitter 32 to ensure the stability of the liquid level in the filling cylinder 29. The liquid level height cannot exceed the breathing port of the filling valve 31. The No. 13 pneumatic butterfly valve 38 and the No. 2 pressure transmitter 39 dynamically adjust the gas pressure in the filling cylinder 29 to stabilize it. When the liquid level in the filling cylinder 29 rises rapidly, the No. 2 pneumatic angle valve 35 can be opened briefly to speed up the reflux speed.

[0037] (c) Low-temperature reflux process: When the No. 3 temperature transmitter 40 detects that the filling temperature is not high enough, the bottle feeding stops, the hot filling material continues to enter the filling cylinder 29, the reflux proportional valve 28 is adjusted to the maximum opening, and the No. 12 pneumatic butterfly valve 33 is opened to achieve full cylinder reflux. When the temperature of the No. 2 temperature transmitter 17 and the No. 2 liquid level transmitter 32 reaches the set temperature at the same time, the No. 2 pneumatic butterfly valve 4, the No. 1 pneumatic angle valve 34, the No. 2 pneumatic angle valve 35 and the No. 13 pneumatic butterfly valve 38 are opened, the No. 12 pneumatic butterfly valve 33 is closed, and the opening of the liquid inlet proportional valve 5 is reduced to a fixed value A. The liquid level in the filling cylinder 29 begins to drop until the liquid level drops below the breathing port of the filling valve 31. The No. 2 pneumatic angle valve 35 is closed, and the opening of the reflux proportional valve 28 is dynamically adjusted to ensure the stability of the liquid level, indicating that the bottle feeding and filling can be normal. After the bottles are continuously fed, the No. 2 pneumatic butterfly valve 4 is closed.

[0038] It should also be noted that during hot filling, a back pressure of 0.5-1 bar is required in the filling cylinder 29, which is mainly used to blow away the foam and liquid in the exhaust pipe of the filling valve 31 at the bottle inlet and outlet positions. Otherwise, the return air will be poor, which can easily lead to unstable liquid level. Since the CO2 air inlet pipe is used as a reflux pipe, there is no additional back pressure channel. The air in the bottle is replaced by the filling device to achieve the gas pressure back pressure in the filling cylinder 29. The No. 13 pneumatic butterfly valve 38 and the No. 2 pressure transmitter 39 are interlocked to control the pressure in the filling cylinder 29, and only the upper limit is set.

[0039] The above is a detailed description of the preferred embodiments of the present invention, which cannot be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A hot and cold dual filling system, characterized in that: It comprises a filling unit, a main liquid inlet pipeline, a CO2 back pressure pipeline and a return pipeline; the main liquid inlet pipeline, the CO2 back pressure pipeline and the return pipeline are all connected to the filling unit through a gas-liquid distributor (36), the CO2 back pressure pipeline is connected to the return pipeline, and the return pipeline is connected to the main liquid inlet pipeline.

2. A hot and cold dual filling system according to claim 1, characterized in that: The filling unit comprises a filling cylinder (29), the gas-liquid distributor (36) is arranged at the bottom center of the filling cylinder (29), a plurality of filling valves (31) are evenly distributed on the outer periphery of the bottom of the filling cylinder (29), and a No. 12 pneumatic butterfly valve (33) and a No. 13 pneumatic butterfly valve (38) are installed on the cylinder cover (30) at the top of the filling cylinder (29).

3. A hot and cold dual filling system according to claim 2, characterized in that: A No. 2 liquid level transmitter (32), a No. 2 pressure transmitter (39) and a No. 3 temperature transmitter (40) are also arranged on the cylinder cover (30) at the top of the filling cylinder (29). A liquid inlet pipe and a return pipe are distributed on the inner wall of the filling cylinder (29). The return pipe is distributed in upper and lower layers, and the return switch is controlled by a No. 1 pneumatic angle valve (34) and a No. 2 pneumatic angle valve (35) respectively. The return port of the No. 1 pneumatic angle valve (34) is located below the breathing port of the filling valve (31), and the return port of the No. 2 pneumatic angle valve (35) is flush with the bottom of the filling cylinder (29).

4. A hot and cold dual filling system according to claim 1, characterized in that: The main liquid inlet pipeline comprises a CIP liquid inlet pipeline, and a No. 1 pressure transmitter (1), a No. 1 temperature transmitter (2), a liquid inlet proportional valve (5), a liquid filter (6), a No. 3 pneumatic butterfly valve (7), a sampling valve (8) and a No. 4 pneumatic butterfly valve (9) are sequentially arranged in the liquid inlet direction of the CIP liquid inlet pipeline.

5. A hot and cold dual filling system according to claim 4, characterized in that: The reflux pipeline comprises a CIP reflux pipeline, wherein a No. 10 pneumatic butterfly valve (20), a No. 9 pneumatic butterfly valve (19), a No. 2 temperature transmitter (17), a reflux tank (13), a No. 5 pneumatic butterfly valve (12), a centrifugal pump (11) and a No. 1 check valve (10) are sequentially arranged in the return direction of the CIP reflux pipeline, and a No. 1 liquid level transmitter (15) and a No. 6 pneumatic butterfly valve (14) are arranged on the top of the reflux tank (13).

6. A hot and cold dual filling system according to claim 5, characterized in that: A first pneumatic butterfly valve (3) and a second pneumatic butterfly valve (4) are arranged at intervals on the pipeline connecting the reflux tank (13) and the CIP liquid inlet pipeline, and the first pneumatic butterfly valve (3) and the second pneumatic butterfly valve (4) are located between the first temperature transmitter (2) and the liquid inlet proportional valve (5).

7. A hot and cold dual filling system according to claim 6, characterized in that: The CO2 back-pressure pipeline comprises a CO2 air intake pipeline, and a manual butterfly valve (21), a pressure reducing valve (22), a pre-filter (23), a fine filter (24), a No. 2 check valve (25), a carbon dioxide proportional valve (26), a No. 11 pneumatic butterfly valve (27) and a reflux proportional valve (28) are sequentially arranged in the air intake direction of the CO2 air intake pipeline.

8. A hot and cold dual filling system according to claim 7, characterized in that: The CO2 inlet pipeline is connected to the CIP return pipeline via a connecting pipe, one end of the connecting pipe is located between the No. 11 pneumatic butterfly valve (27) and the return proportional valve (28), and the other end of the connecting pipe is located between the No. 2 temperature transmitter (17) and the No. 9 pneumatic butterfly valve (19). The connecting pipe is provided with a No. 7 pneumatic butterfly valve (16) and a No. 8 pneumatic butterfly valve (18), and the No. 7 pneumatic butterfly valve (16) is also connected to the return tank (13).

9. A hot and cold dual filling system according to claim 8, characterized in that: It also includes an electrical distributor (37), which is respectively connected to the gas-liquid distributor (36), the carbon dioxide proportional valve (26), the reflux proportional valve (28) and the liquid inlet proportional valve (5).

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