Dynamic buffer module in dairy simultaneous mixing system and simultaneous mixing system

Abstract

The utility model provides a kind of dynamic buffering module in dairy product synchronous mixing system and synchronous mixing system.The dynamic buffering module in dairy product synchronous mixing system, comprising: for receiving input end of cream, first pipeline, second pipeline, mixing unit, dynamic buffering unit and control unit;The input end with the inlet of the dynamic buffering unit is communicated by first pipeline, and the outlet of the dynamic buffering unit with the mixing unit is communicated by second pipeline;The control unit is used to control the release of the cream in the dynamic buffering unit.The dynamic buffering module in dairy product synchronous mixing system can solve the problem of synchronous mixing caused by the difference in processing time of skim milk and cream.

Description

Technical Field

[0001] This utility model relates to the field of dairy processing technology, specifically to a dynamic buffer module and a synchronous mixing system in a dairy product synchronous mixing system. Background Technology

[0002] Figure 1 This is a flowchart of a dairy product production system in the existing technology. (Example:) Figure 1 As shown, in low-temperature fresh milk production, milk needs to be separated into skim milk and cream using a centrifuge. These are then subjected to different heat treatments (e.g., skim milk requires ceramic membrane filtration and high-temperature sterilization, while cream requires pasteurization). Finally, the two are mixed in a specific ratio in a mixing unit to form the final product. The core requirement of this scenario is to ensure that both media arrive at the mixing unit synchronously after completing their respective processing paths. This guarantees the stability of product indicators (such as fat content and microbiological indicators) and avoids material waste and system interruptions due to differences in processing time.

[0003] In existing low-temperature fresh milk production systems, there are significant differences in the processing paths for skim milk and cream: Skim milk processing path: requires sequential passage through a sterilization separator, ceramic membrane filtration, and high-temperature sterilization, which takes a relatively long time (about 15 minutes); Cream processing path: only requires pasteurization, which takes a relatively short time (about 8 minutes).

[0004] In existing technologies, the processing paths for the two media are not designed with a synchronization mechanism, leading to the following problems: Synchronization difficulties: Due to differences in processing time, cream often arrives at the mixing point before skim milk, or the skim milk takes too long to process, causing the cream to finish processing prematurely, preventing the two from merging simultaneously at the mixing point; System continuity issues: To maintain continuous production, the cream processing path needs to operate continuously, but if the cream arrives at the mixing point prematurely, the system needs to wait for the skim milk to finish processing, causing the cream to accumulate or be forced to be discharged before the mixing point, resulting in material waste; Unstable product indicators: Inconsistent mixing times lead to uneven temperature and component distribution between the two media, affecting the stability of the final product (such as fluctuations in fat content and differences in sterilization effect). Utility Model Content

[0005] In view of this, the present invention provides a dynamic buffer module in a dairy product synchronous mixing system, which can solve the problem of synchronous mixing caused by the difference in processing time between skim milk and light cream.

[0006] This utility model also provides a dairy product synchronous mixing system, including the above-mentioned dairy product synchronous mixing module, which can realize the synchronous mixing of skim milk and light cream.

[0007] The first aspect of this utility model provides a dynamic buffer module in a dairy product synchronous mixing system, comprising: an input end for receiving light cream, a first pipe, a second pipe, a mixing unit, a dynamic buffer unit, and a control unit;

[0008] The input terminal is connected to the inlet of the dynamic buffer unit through a first pipe, and the outlet of the dynamic buffer unit is connected to the mixing unit through a second pipe;

[0009] The control unit is used to control the release of cream from the dynamic buffer unit.

[0010] The dynamic buffer module described above, wherein the control unit includes a valve located on the second pipeline; or,

[0011] The control unit is electrically connected to the dynamic buffer unit.

[0012] The dynamic buffer module described above further includes a third pipe, through which the outlet of the mixing unit and the inlet of the dynamic buffer unit are connected.

[0013] The dynamic buffer module described above further includes a third pipe, with the outlet of the mixing unit connected to one end of the third pipe and the other end of the third pipe connected to the first pipe.

[0014] The dynamic buffer module described above also includes an alternative medium supply unit and a bypass pipe;

[0015] The first end of the bypass pipe is connected to the third pipe, and the second end of the bypass pipe is connected to the second pipe;

[0016] The outlet of the alternative medium supply unit is connected to the bypass pipe.

[0017] The second aspect of this utility model provides a dairy product synchronous mixing system, which includes the dynamic buffer module described in the first aspect.

[0018] The dairy product synchronous mixing system described above further includes a skim milk preparation module, which includes a skim milk supply unit, the outlet of which is connected to the inlet of the mixing unit.

[0019] In the dairy product synchronous mixing system described above, the skim milk preparation module further includes a filtration unit, the outlet of the skim milk supply unit is connected to the inlet of the filtration unit, and the outlet of the filtration unit is connected to the inlet of the mixing unit.

[0020] The dairy product synchronous mixing system described above further includes a homogenization unit, the outlet of which is connected to the inlet of the homogenization unit.

[0021] The dairy product synchronous mixing system described above further includes a sterilization unit, wherein the outlet of the homogenization unit is connected to the inlet of the sterilization unit.

[0022] The dynamic buffer module in the synchronous mixing system for dairy products of this invention can dynamically store cream and adjust its discharge time to match the processing time of skim milk by adding a dynamic buffer unit, thereby achieving synchronous mixing of skim milk and cream.

[0023] This invention relates to a simultaneous mixing system for dairy products, which enables the simultaneous mixing of skim milk and light cream and is suitable for widespread application. Attached Figure Description

[0024] Figure 1 This is a flowchart of a dairy product production system in the existing technology;

[0025] Figure 2 This is a schematic diagram of the dynamic buffer module in the first embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the dynamic buffer module in the second embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the dynamic buffer module in the third embodiment of this utility model;

[0028] Figure 5 This is a schematic diagram of the dynamic buffer module in the fourth embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the dairy product synchronous mixing system in some embodiments of this utility model;

[0030] Figure 7 This is a flowchart of a dairy product synchronous mixing system in some embodiments of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1: Dynamic buffer unit;

[0033] 2: Hybrid unit;

[0034] 3: Control unit;

[0035] 11: First Pipeline;

[0036] 12: Second pipeline;

[0037] 13: The third pipeline;

[0038] 14: Bypass pipe;

[0039] 21: Skim milk supply unit;

[0040] 22: Filter unit;

[0041] 23: Homogeneous unit;

[0042] 24: Sterilization unit. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0044] Existing technologies attempt to balance the time difference by adjusting equipment operating speed or extending the cream processing path, but these solutions have the following drawbacks: high equipment modification costs (requiring physical modifications to existing pipelines or processing units, increasing investment); poor system stability (the waiting time in the cream processing path is uncontrollable, easily leading to system flow fluctuations or operational interruptions); and significant material loss (cream arriving early cannot be effectively utilized, resulting in direct discharge and raw material waste (e.g., approximately 1.6 tons of product may be lost per batch)). The inventors discovered that by setting a dynamic buffer module in a dairy product synchronous mixing system, cream can be dynamically stored, and its discharge time adjusted to match the skim milk processing time, thereby achieving synchronous mixing of skim milk and cream.

[0045] Figure 2 This is a schematic diagram of the dynamic buffer module in the first embodiment of the present invention; Figure 3 This is a schematic diagram of the dynamic buffer module in the second embodiment of this utility model. Figure 2 or Figure 3 As shown, the first aspect of this utility model provides a dynamic buffer module in a dairy product synchronous mixing system, comprising: an input end for receiving light cream, a first pipe 11, a second pipe 12, a mixing unit 2, a dynamic buffer unit 1, and a control unit 3;

[0046] The input terminal is connected to the inlet of the dynamic buffer unit 1 through the first pipe 11, and the outlet of the dynamic buffer unit 1 is connected to the mixing unit 2 through the second pipe 12.

[0047] Control unit 3 is used to control the release of cream from dynamic buffer unit 1.

[0048] Specifically, the whipped cream is input through the input terminal, enters the first pipe 11 through the inlet, and exits through the outlet of the first pipe 11; it enters the dynamic buffer unit 1 through the inlet, is temporarily stored in the dynamic buffer unit 1, and the control unit 3 controls whether the whipped cream in the dynamic buffer unit 1 is released or not. The whipped cream in the dynamic buffer unit 1 is exited through the outlet of the dynamic buffer unit 1, enters the second pipe 12 through the inlet, exits through the outlet of the second pipe 12, enters the mixing unit 2 through the inlet, and is mixed with skim milk in the mixing unit 2 to obtain dairy products.

[0049] This disclosure provides a dynamic buffer module that solves the problem of asynchronous mixing caused by the time difference in the processing paths of skim milk and light cream by using the temporary storage function of the dynamic buffer unit 1 and the synergistic effect of the control unit 3.

[0050] This invention does not impose any particular limitation on the specific structure of the dynamic buffer unit. In some embodiments, the dynamic buffer unit can be a buffer tank.

[0051] In this embodiment, the capacity design of the dynamic buffer unit 1 is based on the calculation result of the processing time difference between skim milk and cream (T3=T1-T2). The buffer volume is determined by the formula L=X*(T1-T2) / 3600, where X is the cream pasteurization production capacity (liters / hour), T1 is the time (seconds) for skim milk to reach the mixing unit 2, and T2 is the time (seconds) for cream to reach the mixing unit 2. The volume of the dynamic buffer unit 1 must be at least twice the buffer volume to ensure the cleaning of the dynamic buffer unit and to ensure the stability of system operation.

[0052] Based on time difference calculation and buffer optimization, this invention designs the capacity of the dynamic buffer unit and the amount of cream buffered by quantifying the processing time difference between skim milk and cream (T3=T1-T2), which can ensure that the system flow fluctuation or overflow risk is avoided while mixing synchronously.

[0053] like Figure 2 As shown, in one specific embodiment, the control unit 3 includes a valve located on the second pipe 12.

[0054] This embodiment achieves precise timing management of cream release through mechanical control of a valve. When a valve is used, its opening and closing action is synchronized with the skim milk processing progress, and the valve is triggered to open by a preset time difference (T3).

[0055] like Figure 3 As shown, in another specific embodiment, the control unit 3 is electrically connected to the dynamic buffer unit 1.

[0056] This embodiment achieves precise timing management of cream release through automated control via electrical connection. When using electrical connection, the control unit 3 monitors the flow status of skim milk and cream in real time via sensors and dynamically adjusts the release timing.

[0057] Both of the above solutions can ensure a precise match between the release of cream in mixing unit 2 and the arrival of skim milk. Meanwhile, the electrical connection solution can adapt to equipment operation fluctuations through feedback adjustment, further improving synchronization accuracy.

[0058] Figure 4 This is a schematic diagram of the dynamic buffer module in the third embodiment of this utility model. Figure 4 As shown, in another specific embodiment, a third pipe 13 is also included, through which the outlet of the mixing unit 2 and the inlet of the dynamic buffer unit 1 are connected.

[0059] Specifically, the dairy products mixed by mixing unit 2 are output from the outlet of mixing unit 2, enter the third pipe 13 through the inlet of the third pipe 13, output from the outlet of the third pipe 13, and enter the dynamic buffer unit 1 through the inlet of the dynamic buffer unit 1.

[0060] In this embodiment, a closed-loop circuit is constructed between the mixing unit 2 and the dynamic buffer unit 1 through the third pipe 13, allowing the mixed dairy products to be partially returned to the dynamic buffer unit 1 for secondary buffering. This design replenishes the reserve of the dynamic buffer unit 1 through the return mechanism during system startup or abnormal operating conditions (such as delays in skim milk processing), ensuring a continuous and stable supply of materials to the mixing unit 2.

[0061] The placement of the third pipe 13 also optimizes the system's spatial layout through the coordinated design of pipe length and flow velocity (V=πd²h / 4), where d is in meters and V is in meters. 3 This ensures that the time constant of the reflow path matches that of the main processing path, thus avoiding the introduction of new time differences due to reflow.

[0062] Figure 5 This is a schematic diagram of the structure of the dairy product synchronous mixing system in some embodiments of this utility model. For example... Figure 5 As shown, in another specific embodiment, a third pipe 13 is also included, the outlet of the mixing unit 2 is connected to one end of the third pipe 13, and the other end of the third pipe 13 is connected to the first pipe 11.

[0063] Specifically, the dairy products mixed by mixing unit 2 are output from the outlet of mixing unit 2, enter the third pipe 13 through the inlet of the third pipe 13, are output from the outlet of the third pipe 13, enter the first pipe 11 through the inlet of the first pipe 11, are output from the outlet of the first pipe 11, and enter the dynamic buffer unit 1 through the inlet of the dynamic buffer unit 1.

[0064] In this embodiment, the third pipeline 13 couples the mixing unit 2 with the skim milk input path, so that a part of the mixed dairy product can flow back to the upstream end of the skim milk treatment process. When the cream is processed too fast (T2<T1), this design dilutes the flow rate of skim milk through backflow, so that the processing time of the two tends to be balanced.

[0065] The flow rate control of the third pipeline 13 is realized by a regulating valve, and its opening degree is dynamically adjusted according to the real-time monitored difference T1-T2, so as to ensure that the backflow ratio matches the mixing requirement. This solution adjusts the time constant of the processing path through material circulation, reduces the dependence on the capacity of the dynamic buffer unit 1, and improves the flexibility of the system.

[0066] As shown in Figure 4 or Figure 5 , in another specific embodiment, the system further comprises an alternative medium supply unit and a bypass pipeline 14; a first end of the bypass pipeline 14 is in communication with the third pipeline 13, and a second end of the bypass pipeline 14 is in communication with the second pipeline 12; an outlet of the alternative medium supply unit is in communication with the bypass pipeline 14.

[0067] Specifically, cream is temporarily stored in the dynamic buffer unit 1, the alternative medium in the alternative medium supply unit is output through the outlet of the alternative medium supply unit, enters the bypass pipeline 14, is output through the second end of the bypass pipeline 14, enters the second pipeline 12, and enters the mixing unit 2 through the inlet of the mixing unit 2.

[0068] In the present utility model, the second end of the bypass pipeline 14 can be located upstream of the valve or downstream of the valve.

[0069] In the present utility model, the physical parameters of the alternative medium only need to be close to those of cream. In some embodiments, the alternative medium can be pure water.

[0070] In this embodiment, the alternative medium (such as pure water) is introduced through the bypass pipeline 14 to maintain continuous operation of the system. When the dynamic buffer unit 1 is in the cream temporary storage stage, the alternative medium enters the second pipeline 12 through the bypass pipeline 14, simulating the flow characteristics of cream to keep the operating parameters of the equipment stable.

[0071] The flow rate of the alternative medium matches the flow velocity v of the cream processing path (Q=πr²v), and its physical parameters such as temperature and viscosity are adjusted by the pretreatment unit to be close to the characteristics of dairy products, so as to avoid equipment wear or process fluctuation caused by medium differences. On the premise of ensuring system continuity, this design reduces the product loss from 16 minutes in the traditional process to zero, and reduces water consumption through recycling of the alternative medium.

[0072] In this invention, the control unit 3 achieves precise release of cream via valves or electrical connections. When skim milk reaches the mixing unit 2, the dynamic buffer unit 1 releases the pre-stored cream, allowing the two to merge synchronously within the mixing unit 2. This design, through a synergistic mechanism of physical storage and dynamic release, eliminates product loss caused by time differences in traditional processes. Simultaneously, by introducing a substitute medium (such as pure water) through the bypass pipe 14, it maintains continuous system operation, avoiding the risk of equipment downtime due to production interruptions.

[0073] Figure 6 This is a schematic diagram of the structure of the dairy product synchronous mixing system in some embodiments of this utility model; Figure 7 This is a flowchart of a simultaneous mixing system for dairy products in some embodiments of this utility model. For example... Figure 6 as well as Figure 7 As shown, a second aspect of this utility model provides a dairy product synchronous mixing system, including the aforementioned dynamic buffer module.

[0074] This invention's synchronous mixing system for dairy products enables the simultaneous mixing of skim milk and cream. The system exhibits excellent continuity, minimizing raw material waste. Furthermore, consistent mixing time ensures uniform temperature and component distribution between the two media, improving product stability (e.g., minimal fluctuations in fat content and consistent sterilization). In some embodiments, after synchronous mixing, the temperature and component distribution of skim milk and cream are uniform, resulting in a final product fat content fluctuation of ≤0.1% and a microbiological compliance rate of 99.5%.

[0075] In one specific embodiment, it also includes a skim milk preparation module, which includes a skim milk supply unit 21, the outlet of which is connected to the inlet of the mixing unit 2.

[0076] Specifically, skim milk from the separator is output through the outlet of skim milk supply unit 21 and enters mixing unit 2 through the inlet of mixing unit 2, where skim milk and cream are mixed.

[0077] In another specific embodiment, the skim milk preparation module further includes a filtration unit 22, the outlet of the skim milk supply unit 21 is connected to the inlet of the filtration unit 22, and the outlet of the filtration unit 22 is connected to the inlet of the mixing unit 2.

[0078] Specifically, skim milk is output from the outlet of skim milk supply unit 21, enters filter unit 22 through the inlet of filter unit 22, where impurities are filtered out. After filtration, it is output from the outlet of filter unit 22 and enters mixing unit 2 through the inlet of mixing unit 2.

[0079] This invention does not impose any particular limitation on the filter unit, and any filter unit commonly used in the art can be used. In some embodiments, the filter unit 22 may be, for example, a ceramic membrane filter unit.

[0080] This embodiment removes microorganisms and macromolecular impurities from skim milk using a ceramic membrane filtration unit, extending the processing time (T1) by approximately 3-5 minutes compared to traditional pasteurization. The transmembrane pressure difference (ΔP) of the filtration unit 22 is monitored and adjusted online. When ΔP exceeds a set threshold (e.g., 0.3 MPa), a backwashing procedure is triggered to ensure stable filtration efficiency.

[0081] Specifically, in the ceramic membrane filtration unit, the pore size of the ceramic membrane can be 0.1-0.5μm.

[0082] This design replaces some of the heat treatment steps with physical filtration, which improves the stability of skim milk while keeping the T1-T2 difference within a reasonable range and reducing the capacity requirement of the dynamic buffer unit 1.

[0083] In another specific embodiment, a homogenizing unit 23 is also included, and the outlet of the mixing unit 2 is connected to the inlet of the homogenizing unit 23.

[0084] Specifically, after skim milk and cream are mixed in mixing unit 2, they are output through the outlet of mixing unit 2 and enter homogenizing unit 23 through the inlet of homogenizing unit 23. In homogenizing unit 23, cream and skim milk can be mixed more evenly, and the taste and stability of the product can be improved.

[0085] In this embodiment, the homogenization unit 23 reduces the fat globule size of the mixed milk from 2-5 μm in traditional processes to 0.5-1 μm, thereby improving the product's taste and stability.

[0086] Specifically, the pressure of the homogenizing unit can be 20 MPa.

[0087] The processing time (T4) of homogenization unit 23 is adjusted by the opening degree of the homogenization valve, which matches the output flow rate of mixing unit 2 (Q=πr²v). The homogenized dairy products then enter sterilization unit 24, where ultra-high temperature (UHT) sterilization ensures that microbiological indicators meet standards. This design, through the synergistic effect of homogenization and sterilization, ensures that the final product exhibits no fat floating within a 28-day shelf life, significantly superior to the 7-day shelf life of traditional processes.

[0088] In another specific embodiment, a sterilization unit 24 is also included, and the outlet of the homogenization unit 23 is connected to the inlet of the sterilization unit 24.

[0089] Specifically, the mixed cream and skim milk are homogenized in homogenization unit 23, and then output through the outlet of homogenization unit 23 and enter sterilization unit 24 through the inlet of sterilization unit 24 to remove bacteria, microorganisms and other contaminants from the product, resulting in sterile dairy products.

[0090] This invention does not impose any particular limitation on the sterilization unit, and it can be any sterilization unit commonly used in the art. In some embodiments, the sterilization unit 24 can be, for example, an ultra-high temperature instantaneous sterilization unit.

[0091] In this embodiment, commercial sterilization of mixed milk is achieved through an ultra-high temperature instantaneous sterilization (UHT) unit, and the heat treatment time (T5) is adjusted by the heat exchange area (A) and flow rate (Q) of the heat exchanger (T5=Q / (A·ΔT)).

[0092] Specifically, in the ultra-high temperature instantaneous sterilization unit, the temperature can be 145℃ and the time can be 4 seconds.

[0093] The outlet of the sterilization unit 24 can be equipped with an aseptic filling system, which is protected by positive pressure (0.1-0.3 MPa) to prevent secondary contamination. This design, through precise control of heat treatment parameters, ensures sterilization while keeping the nutrient loss rate of dairy products below 5%, which is better than the 10-15% loss rate of traditional pasteurization.

[0094] Specifically, this embodiment integrates a dynamic buffer module with a skim milk preparation module and a homogenization unit 23 to construct a complete online dairy product mixing system. The skim milk preparation module includes a skim milk supply unit 21 and a filtration unit 22. The skim milk enters the mixing unit 2 after being filtered through a ceramic membrane. Its processing time (T1) is calculated by multiplying the pipe length (h) and the flow rate (v) (T1=h / v), where h is in meters. The homogenization unit 23 is located downstream of the mixing unit 2 and improves the stability of the mixed milk through high-pressure homogenization (pressure range 15-30MPa). The sterilization unit 24 further employs ultra-high temperature instantaneous sterilization (UHT, temperature 135-150℃, time 2-5 seconds) to ensure that the final product's microbiological indicators meet standards. The various modules of the system are interlocked and controlled by a PLC. Based on the real-time monitoring of the T1-T2 difference, the release strategy of the dynamic buffer unit 1 is dynamically adjusted, keeping the material ratio error of the mixing unit 2 within ±2%, significantly improving product consistency.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A dynamic buffer module in a dairy product synchronous mixing system, characterized in that, include: The system includes an input terminal for receiving whipped cream, a first pipe, a second pipe, a mixing unit, a dynamic buffer unit, and a control unit. The input terminal is connected to the inlet of the dynamic buffer unit through a first pipe, and the outlet of the dynamic buffer unit is connected to the mixing unit through a second pipe; The control unit is used to control the release of cream from the dynamic buffer unit.

2. The dynamic buffer module according to claim 1, characterized in that, The control unit includes a valve located on the second pipeline; or, The control unit is electrically connected to the dynamic buffer unit.

3. The dynamic buffer module according to claim 1, characterized in that, It also includes a third conduit, through which the outlet of the mixing unit is connected to the inlet of the dynamic buffer unit.

4. The dynamic buffer module according to claim 1, characterized in that, It also includes a third pipe, the outlet of the mixing unit is connected to one end of the third pipe, and the other end of the third pipe is connected to the first pipe.

5. The dynamic buffer module according to claim 3 or 4, characterized in that, It also includes alternative media supply units and bypass pipelines; The first end of the bypass pipe is connected to the third pipe, and the second end of the bypass pipe is connected to the second pipe; The outlet of the alternative medium supply unit is connected to the bypass pipe.

6. A synchronous hybrid system, characterized in that, Includes the dynamic buffer module as described in any one of claims 1-5.

7. The synchronous mixing system according to claim 6, characterized in that, It also includes a skim milk preparation module, which includes a skim milk supply unit, the outlet of which is connected to the inlet of the mixing unit.

8. The synchronous mixing system according to claim 7, characterized in that, The skim milk preparation module also includes a filtration unit, the outlet of the skim milk supply unit is connected to the inlet of the filtration unit, and the outlet of the filtration unit is connected to the inlet of the mixing unit.

9. The synchronous hybrid system according to any one of claims 6-8, characterized in that, It also includes a homogenizing unit, the outlet of which is connected to the inlet of the homogenizing unit.

10. The synchronous mixing system according to claim 9, characterized in that, It also includes a sterilization unit, the outlet of which is connected to the inlet of the sterilization unit.

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