A water bath sterilization temperature, pressure, and uniform water distribution system

Abstract

The present invention discloses a water bath sterilization temperature, pressure and water distribution uniform system, belonging to the technical field of drug sterilization. The water bath sterilization temperature, pressure and water distribution uniform system includes a sterilizer, wherein a sterilization cavity is arranged inside the sterilizer; a sterilization rack, which is slidably arranged inside the sterilization cavity; a water distribution system, which is arranged above the sterilization cavity and is used for spraying and sterilizing products on the sterilization rack; a circulating water constant pressure system, which is arranged above the sterilizer and is connected with the water distribution system; and a temperature uniform device, which is arranged on the circulating water constant pressure system. By applying the water bath sterilization temperature, pressure and water distribution uniform system provided by the present invention, it can be realized that the heating (cooling) of a batch of drugs is more uniform in the same time period, and the consistency of the sterile level, physical and chemical properties of the products is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of pharmaceutical sterilization, and more specifically, to a water bath sterilization temperature, pressure, and uniform water distribution system. Background Art

[0002] Infusion is one of the most widely used and important treatment means in clinical practice. The liquid medicine directly enters the blood through the human vein, and the aseptic level of the liquid medicine is crucial for the safety of human medication. The guarantee of the sterility of large-volume injections is usually achieved by killing microorganisms, and the mainstream sterilization method in the large-volume injection industry is the autoclave sterilization method.

[0003] The most commonly used autoclave sterilization method is to heat water by steam or other media and kill pharmaceutical microorganisms with "superheated water" under a certain pressure. Due to factors such as the temperature uniformity of water, temperature controllability, and the economy of the medium, it has been widely used in the pharmaceutical industry. The method of killing microorganisms with "superheated water" is called the water bath sterilization method.

[0004] Although the water bath sterilization method has an advantage in temperature uniformity compared to other sterilization methods, in the actual pharmaceutical sterilization process, this temperature uniformity is also relative. Medicines sterilized with "superheated water" in the same sterilizer will also exhibit different physical and chemical characteristics due to temperature differences. The fundamental reasons for these different characteristics are mainly reflected in the uneven water volume and uneven water temperature of the medicine shower.

[0005] This temperature difference has a particularly prominent impact on the sterilization quality of heat-sensitive medicines. Summary of the Invention

[0006] The purpose of the present invention is to provide a water bath sterilization temperature, pressure, and uniform water distribution system in order to solve the technical problems existing in the background art.

[0007] To achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A water bath sterilization temperature, pressure, and uniform water distribution system includes: a sterilizer, within which a sterilization chamber is provided; a sterilization rack, which is slidably arranged within the sterilization chamber; a water distribution system, arranged above the sterilization chamber for spraying and sterilizing the products on the sterilization rack; a circulating water constant pressure system, which is arranged above the sterilizer and connected to the water distribution system; and a temperature uniformity device, which is arranged on the circulating water constant pressure system.

[0009] Furthermore, the water bath sterilization temperature, pressure, and uniform water distribution system further includes: a heating heat exchange device and a refrigeration heat exchange device that are respectively communicated with the temperature uniformity device.

[0010] Further, the water distribution system includes: a constant-pressure pipe inside the cabinet, which is communicated with the water outlet end of the circulating water constant-pressure system; a shunt pipe, and a plurality of the shunt pipes are connected to the constant-pressure pipe inside the cabinet at equal intervals; a water distribution tray: a plurality of the water distribution trays are arranged at the top of the sterilization cavity, and each water distribution tray is provided with a water storage cavity, and a plurality of first water leakage holes are provided at the bottom of the water storage cavity, and each water distribution tray corresponds to a shunt pipe; a retaining ring, the retaining ring is arranged at the bottom of the water storage cavity, and the shunt pipe is arranged inside the retaining ring.

[0011] Further, the shunt pipe is U-shaped, the middle part of the shunt pipe is connected to the constant-pressure pipe inside the cabinet, two retaining rings are arranged on each water distribution tray, and the two ends of the U-shaped shunt pipe are respectively arranged inside the retaining rings, and flow regulating flower plates are respectively arranged at the two ends of the shunt pipe.

[0012] Further, the circulating water constant-pressure system includes: a balance pipe, the inlet of the balance pipe is communicated with the water outlet of the temperature uniformity device; a constant-pressure tank, the water inlet of the constant-pressure tank is communicated with the outlet of the balance pipe; a constant-pressure pipe outside the cabinet, the water outlet of the constant-pressure tank is connected to the constant-pressure pipe outside the cabinet, the constant-pressure pipe outside the cabinet is connected to the constant-pressure pipe inside the cabinet through a connecting pipe, and the connecting pipe is hermetically fixed on the side wall of the sterilizer.

[0013] Further, there are two sets of the balance pipe and the constant-pressure tank, and they are respectively symmetrically arranged on both sides of the temperature uniformity device; the diameter of the balance pipe is set to be gradually smaller from the end far away from the constant-pressure tank to the end close to the constant-pressure tank.

[0014] Further, the temperature uniformity device includes: a temperature controller, which is respectively arranged on the constant-pressure tank; a temperature balancing device, which is arranged on the balance pipe; a mixing water pipe, and the water outlet end of the mixing water pipe is respectively communicated with the water inlet of the two balance pipes.

[0015] Further, the heating heat exchange device includes a heating heat exchanger and a first water pump, the water inlet end of the first water pump is communicated with the bottom of the sterilizer, the water outlet end of the first water pump is connected with the water inlet of the heating heat exchanger, and the water outlet of the heating heat exchanger is connected with the water inlet end of the mixing water pipe.

[0016] Further, the refrigeration heat exchange device includes a refrigeration heat exchanger and a second water pump, the water inlet end of the second water pump is communicated with the bottom of the sterilizer, the water outlet end of the second water pump is connected with the water inlet of the refrigeration heat exchanger, and the water outlet of the refrigeration heat exchanger is connected with the water inlet end of the mixing water pipe.

[0017] Further, the sterilization rack includes: a plurality of sterilization boxes stacked on top of each other. Each sterilization box is provided with a placement cavity. The bottom of the sterilization box has a hollow interlayer. The top wall of the hollow interlayer is provided with a plurality of through second water leakage holes, and the bottom wall of the hollow interlayer is provided with a plurality of through third water leakage holes. The aperture of the second water leakage holes is larger than the aperture of the third water leakage holes.

[0018] The beneficial effects of the present invention compared with the prior art are as follows:

[0019] The water bath sterilization temperature, pressure, and uniform water distribution system provided by the present invention. After the circulating water is processed by the heating heat exchanger and the refrigeration heat exchanger, the temperature of the water is relatively uniform at the same time period through the temperature uniformity device. Through the balance pipes with gradually decreasing pipe diameters, the flow rate at the smallest pipe diameter is guaranteed, so that the water pressure in the constant pressure tank is at a constant pressure. After the secondary constant pressure pipes (inside and outside the cabinet) balance the pressure again, the water pressure flowing into the shunt pipe is constant. Then, through the fine adjustment of the flow rate adjustment flower plate at the water outlet end of the shunt pipe, it is ensured that the water flow rate flowing into the water distribution plate from each shunt pipe is equal at the same time; at the same time, the temperature difference in each constant pressure tank can be adjusted by the temperature balance device for the water temperature. Finally, the flow rate and temperature of the circulating water flowing into the water distribution plate are uniform at the same time.

[0020] The circulating water flowing into the water distribution plate then showers and heats (cools) the regularly arranged drugs loaded in the sterilization box through the first water leakage holes with the same aperture evenly distributed on the water distribution plate. The circulating water flowing through the surface of the drugs then flows through the larger second water leakage holes on the upper layer of the sterilization box to form an equal water level for water distribution in the interlayer of the sterilization box, and showers and heats (cools) the drugs on the next lower layer through the smaller third water leakage holes at the bottom layer of the sterilization box. Finally, the heating (cooling) of a batch of drugs is more uniform in the same time period, and the consistency of the sterile level, physical, and chemical properties of the products is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of a water bath sterilization temperature, pressure, and uniform water distribution system of the present invention.

[0022] Figure 2 is a schematic structural diagram of the sterilization cavity of a water bath sterilization temperature, pressure, and uniform water distribution system of the present invention.

[0023] Figure 3 is a schematic connection diagram of the water distribution system and the circulating water constant pressure system of a water bath sterilization temperature, pressure, and uniform water distribution system of the present invention.

[0024] Figure 4 is a schematic connection diagram of the water distribution plate and the retaining ring of a water bath sterilization temperature, pressure, and uniform water distribution system of the present invention.

[0025] Figure 5It is a schematic connection diagram of the water distribution tray and the shunt pipe of a water bath sterilization temperature and pressure uniform water distribution system of the present invention.

[0026] Figure 6 It is a schematic connection diagram of the flow rate regulating disc and the shunt pipe of a water bath sterilization temperature and pressure uniform water distribution system of the present invention.

[0027] Figure 7 It is a schematic structural diagram of the sterilization box of a water bath sterilization temperature and pressure uniform water distribution system of the present invention.

[0028] Figure 8 It is a test diagram of the temperature uniformity of a water bath sterilization temperature and pressure uniform water distribution system of the present invention using a wireless verifier.

[0029] Markings in the figure: 1 - sterilizer, 2 - heating heat exchanger, 3 - constant pressure tank, 4 - balance pipe, 5 - constant pressure pipe outside the cabinet, 6 - first water pump, 7 - refrigeration heat exchanger, 8 - water distribution tray, 9 - shunt pipe, 10 - temperature controller, 11 - temperature balance device, 12 - mixing water pipe, 13 - flow rate regulating disc, 14 - retaining ring, 15 - sterilization cavity, 16 - sterilization rack, 17 - medicine, 18 - constant pressure pipe inside the cabinet, 19 - circulating water pipeline inside the cabinet, 20 - second water pump, 21 - first water leakage hole, 22 - sterilization box, 23 - second water leakage hole, 24 - third water leakage hole, 25 - hollow interlayer. Detailed implementation manners

[0030] The present invention will be further described below in conjunction with embodiments. The described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0031] Embodiment 1:

[0032] As Figure 1 and 2 shown, a water bath sterilization temperature and pressure uniform water distribution system includes: a sterilizer 1, a sterilization rack 16, a water distribution system, a circulating water constant pressure system, a temperature uniformity device, a heating heat exchange device, and a refrigeration heat exchange device; a sterilization cavity 15 is provided inside the sterilizer 1; the sterilization rack 16 is slidably arranged inside the sterilization cavity 15, and the sterilization rack 16 is used for placing the medicine 17 to be sterilized. The water distribution system is arranged above the sterilization cavity 15 and is used for spraying and sterilizing the products on the sterilization rack 16; the circulating water constant pressure system is arranged above the sterilizer 1 and is connected to the water distribution system; the temperature uniformity device is arranged on the circulating water constant pressure system; the heating heat exchange device and the refrigeration heat exchange device are respectively communicated with the temperature uniformity device.

[0033] AsFigure 1-3 As shown in the figure, in this embodiment, the water distribution system includes: a constant pressure pipe 18 inside the cabinet, a shunt pipe 9, a water distribution tray 8, and a retaining ring 14. The constant pressure pipe 18 inside the cabinet is connected to the water outlet end of the circulating water constant pressure system; a plurality of the shunt pipes 9 are connected to the constant pressure pipe 18 inside the cabinet at equal intervals; a plurality of the water distribution trays 8 are arranged at the top of the sterilization cavity 15, and each water distribution tray 8 is provided with a water storage cavity. A number of first water leakage holes 21 are provided at the bottom of the water storage cavity. The diameter of the first water leakage holes 21 is about 2 mm. Each water distribution tray 8 corresponds to a shunt pipe 9; the retaining ring 14 is arranged at the bottom of the water storage cavity, and the shunt pipe 9 is arranged inside the retaining ring 14. The function of the retaining ring 14 is to block the influence of the circulating water on the equal water level liquid surface of the water distribution tray 8. There are two retaining rings 14 with a height of 15 - 20 mm and a diameter of 30 mm at the geometric center of the water distribution tray 8. The retaining ring 14 is connected to the water distribution tray 8 by welding. The water distribution tray 8 is connected to the inner wall of the sterilization cavity 15 through a bracket. Among them, preferably, the shunt pipe 9 is U-shaped. The middle part of the shunt pipe 9 is connected to the constant pressure pipe 18 inside the cabinet. Two retaining rings 14 are provided on each water distribution tray 8. The two ends of the U-shaped shunt pipe 9 are respectively arranged inside the retaining ring 14. Flow regulating flower plates 13 are respectively arranged at the two ends of the shunt pipe 9.

[0034] The relative rotation of the two flow regulating flower plates 13 can adjust the flow rate of the shunt pipe 9. The water outlet of the shunt pipe 9 extends 5 mm into the retaining ring 14. The upper end of the shunt pipe 9 is connected to the constant pressure pipe 18 inside the cabinet; the shunt pipes 9 are evenly distributed on the constant pressure pipe 18 inside the cabinet. The diameter of the constant pressure pipe 18 inside the cabinet is more than twice the diameter of the shunt pipe 9; the upper end of the constant pressure pipe 18 inside the cabinet passes through the sterilization cavity 15 and is connected to the constant pressure pipe 5 outside the cabinet. The diameter of the constant pressure pipe 5 outside the cabinet is about twice the diameter of the constant pressure pipe 18 inside the cabinet, and the length is equivalent to that of the constant pressure pipe 18 inside the cabinet; the connection part of the constant pressure pipe 18 inside the cabinet and the constant pressure pipe 5 outside the cabinet is the geometric center of the constant pressure pipe 5 outside the cabinet.

[0035] As Figure 7 shown in the figure, in this embodiment, the sterilization rack 16 includes: a number of sterilization boxes 22 stacked on top of each other. The sterilization box 22 is provided with a placement cavity. The bottom of the sterilization box 22 has a hollow sandwich layer 25. A number of through second water leakage holes 23 are opened on the top wall of the hollow sandwich layer 25. A number of through third water leakage holes 24 are opened on the bottom wall of the hollow sandwich layer 25. The aperture of the second water leakage holes 23 is larger than that of the third water leakage holes 24. The height of the hollow sandwich layer 25 is about 8 - 12 mm. The diameter of the third water leakage holes 24 is about 2 mm. The diameter of the second water leakage holes 23 is about 6 - 8 mm.

[0036] As Figure 4-6As shown, in this embodiment, the constant-pressure circulating water system includes: a balance pipe 4, the inlet of the balance pipe 4 is communicated with the water outlet of the temperature uniformity device; a constant-pressure tank 3, the water inlet of the constant-pressure tank 3 is communicated with the outlet of the balance pipe 4; an external cabinet constant-pressure pipe 5, the water outlet of the constant-pressure tank 3 is connected to the external cabinet constant-pressure pipe 5, and the external cabinet constant-pressure pipe 5 is connected to the internal cabinet constant-pressure pipe 18 through a connecting pipe, and the connecting pipe is hermetically fixed on the side wall of the sterilizer 1. The pipe diameter of the connecting pipe is equivalent to that of the external cabinet constant-pressure pipe 5. Both the balance pipe 4 and the constant-pressure tank 3 are provided in two copies and are symmetrically arranged on both sides of the temperature uniformity device respectively; the pipe diameter of the balance pipe 4 is set to gradually decrease from the end far from the constant-pressure tank 3 to the end close to the constant-pressure tank 3.

[0037] The diameter of the constant-pressure tank 3 is about 3-6 times that of the external cabinet constant-pressure pipe 5, and the height is about 4-5 times the diameter of the external cabinet constant-pressure pipe 5; a temperature controller 10 is installed on the constant-pressure tank 3; the upper end of the constant-pressure tank 3 is connected to the balance pipe 4, and the balance pipe 4 is composed of three pipes with gradually decreasing diameters, and the constant-pressure tank 3 is connected to the smallest-diameter end of the balance pipe 4; the beneficial effect of the three-stage design from large to small is that: the gas in the circulating water gathers at the large pipe and then passes through the buffer of the middle pipe, and the possibility of gas appearing in the circulating water flowing into the small pipe is reduced. At the same time, according to the fluid flow formula, the flow rate Q in the pipe = S * V; Q (the flow rate in the pipe, unit: cubic meters per second); S (the effective cross-sectional area of the pipe, unit: square meters); V (the flow velocity of the medium passing through the pipe, unit: meters per second); it can be seen from the formula that when the pipe diameter gradually decreases and the total circulating water volume is certain, the pipe diameter of the circulating pipeline becomes smaller, and the flow rate per unit cross-sectional area increases. The benefit is that: the water pressure is constant (the circulating pump outputs stably), and when the flow rates flowing from the mixing pipe 12 to the two balance pipes 4 are inconsistent, the flow rates passing through the small-diameter pipes of the balance pipe 4 per unit time are relatively consistent.

[0038] In this embodiment, the temperature uniformity device includes: a temperature controller 10, the temperature controller 10 is respectively arranged on the constant-pressure tank 3; a temperature balance device 11, the temperature balance device 11 is arranged on the balance pipe 4; a mixing pipe 12, the water outlet ends of the mixing pipe 12 are respectively communicated with the water inlets of the two balance pipes 4. The heating heat exchange device includes a heating heat exchanger 2 and a first water pump 6, the water inlet end of the first water pump 6 is communicated with the bottom of the sterilizer 1, the water outlet end of the first water pump 6 is connected to the water inlet of the heating heat exchanger 2, and the water outlet of the heating heat exchanger 2 is connected to the water inlet end of the mixing pipe 12. The refrigeration heat exchange device includes a refrigeration heat exchanger 7 and a second water pump 20, the water inlet end of the second water pump 20 is communicated with the bottom of the sterilizer 1, preferably communicated with the lowest point of the bottom of the sterilizer 1, the water outlet end of the second water pump 20 is connected to the water inlet of the refrigeration heat exchanger 7, and the water outlet of the refrigeration heat exchanger 7 is connected to the water inlet end of the mixing pipe 12.

[0039] The temperature balancing device 11 is wound around the middle section of the balancing pipe 4. The temperature balancing device 11 is a double-wound cold (hot) exchange device. The end with the largest pipe diameter of the balancing pipe 4 is connected to the mixing water pipe 12. The diameter of the mixing water pipe 12 is twice that of the largest pipe diameter of the balancing pipe 4. The connection between the end with the largest pipe diameter of the balancing pipe 4 and the mixing water pipe 12 is located at the 1 / 2 of the geometric dimension inside the mixing water pipe 12. The other end of the mixing water pipe 12 is connected to the water circulation pipe inside the cabinet through a diameter reduction. The other end of the water circulation pipe inside the cabinet is connected to the water heat exchanger inside the cabinet. The water pipes inside the cabinet are respectively connected to the water inlet ends of the refrigeration heat exchanger 7 and the heating heat exchanger 2. The medium end of the refrigeration heat exchanger 7 is connected to the cooling water, and the medium end of the heating heat exchanger 2 is connected to the steam. The water outlet ends of the refrigeration heat exchanger 7 and the heating heat exchanger 2 are connected to the water inlet end of the mixing water pipe 12 through pipes.

[0040] When the sterilizer 1 is in the heating-up stage: The circulating water inside the cabinet is pumped out along the arrow direction by the first water pump 6 and the second water pump 20 and enters the refrigeration heat exchanger 7 and the heating heat exchanger 2 respectively along the circulating water pipe 19 inside the cabinet. The steam valve at the medium end of the heating heat exchanger 2 is opened, and the circulating water inside the cabinet is heated by the steam. The cooling water valve at the medium end of the refrigeration heat exchanger 7 is in the closed state. The refrigeration heat exchanger 7 is used as a bypass of the heating heat exchanger 2 in the heating-up stage to play a role in balancing the water temperature, avoiding the rapid rise of the pressure in the sterilization cavity 15 caused by the rapid rise of the temperature of the circulating water inside the cabinet, which may cause excessive pressure on the medicine 17 and result in deformation due to the imbalance of the internal and external pressures of the medicine 17.

[0041] The circulating water inside the cabinet flowing through the refrigeration heat exchanger 7 and the heating heat exchanger 2 is mixed in the mixing water pipe 12 to make the water temperature relatively uniform. The mixed circulating water then flows into the balancing pipe 4 along the arrow direction respectively and then into the constant pressure tank 3. The decreasing diameter of the balancing pipe 4 ensures that the water flow rate and pressure flowing into the constant pressure tank 3 are relatively uniform. A temperature controller 10 is installed on the constant pressure tank 3. The temperature controller 10 detects the temperature difference of the circulating water in multiple constant pressure tanks 3 and fine-tunes the temperature by turning on the steam through the temperature balancing device 11 set in the middle section of the balancing pipe 4, so that the temperatures of the circulating water in multiple constant pressure tanks 3 are similar. The circulating water with similar temperature and pressure enters the constant pressure pipe 5 outside the cabinet for secondary constant pressure, then flows into the constant pressure pipe 18 inside the cabinet for tertiary constant pressure, and then flows into the water distribution tray 8 through the shunt pipe 9. The slight flow rate differences of multiple water distribution trays 8 are realized through the flow rate regulating flower plate 13 set at the outlet end of the water distribution pipe.

[0042] After the circulating water flowing into the water distribution tray 8 is blocked by the retaining ring 14, it flows into the water storage cavity of the water distribution tray 8 to form an equal-level liquid surface. The purpose is to ensure that the amount of water flowing out of each first water leakage hole 21 evenly distributed on the water distribution tray 8 is the same; the function of the retaining ring 14 is to block the influence of the circulating water on the equal-level liquid surface of the water distribution tray 8; the heated circulating water showers the medicine 17 stored in the sterilization box 22 through the first water leakage holes 21 evenly distributed on the water distribution tray 8 to ensure that each medicine 17 is showered by the circulating water with the same temperature and flow rate at the same moment; the circulating water flowing through the surface of the first-layer medicine 17 forms an equal-level water surface in the hollow sandwich layer 25 through the second water leakage holes 23 at the upper end of the sterilization box 22 and then showers the next-layer medicine 17 through the third water leakage holes 24 at the lower layer of the sterilization box 22.

[0043] In the sterilization and heat preservation stage, the principle is the same as that in the heating-up stage;

[0044] In the sterilization and cooling stage, the cooling water valve at the medium end of the heating heat exchanger 2 is opened, and the circulating water in the cabinet is cooled by the cooling water; the steam valve at the medium end of the heating heat exchanger is in the closed state. The heating heat exchanger 2 is used as a bypass of the refrigeration heat exchanger 7 in the cooling stage to play a role in balancing the water temperature and prevent the circulating water in the cabinet from cooling rapidly, resulting in uneven internal and external pressures of the medicine 17 and causing deformation; at the same time, the temperature controller 10 detects the temperature difference of the circulating water in multiple constant pressure tanks 3 and fine-tunes the temperature by opening the cooling water through the temperature balancing device 11 arranged in the middle section of the balance pipe 4 to make the temperature of the circulating water in multiple constant pressure tanks 3 similar. When the temperature is lower than 100 °C, the temperature balancing device 11 stops working, and the rest of the working process is the same as that in the heating-up stage.

[0045] Appendix Figure 8 It is a test diagram of the temperature uniformity of the sterilizer 1 using a wireless verifier. The wireless verifiers are distributed one per cubic meter; it can be seen from the figure that after adopting the system of the present invention, the temperature difference at the same time point is only 0.16 °C, which is much lower than the industry level of 1.5 °C and the regulatory requirement of ±1 °C, and the overall temperature uniformity is 0.12 °C.

[0046] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water bath sterilization temperature, pressure, and uniform water distribution system, characterized in that, Comprising: A sterilizer (1), within which there is a sterilization chamber (15); A sterilization rack (16), which is slidably arranged within the sterilization chamber (15); A water distribution system, arranged above the sterilization chamber (15) for spraying and sterilizing the products on the sterilization rack (16); A circulating water constant pressure system, which is arranged above the sterilizer (1) and connected to the water distribution system; A temperature uniformity device, which is arranged on the circulating water constant pressure system; The water distribution system includes: An in-cabinet constant pressure pipe (18), which is communicated with the water outlet end of the circulating water constant pressure system; Diversion pipes (9), and a plurality of the diversion pipes (9) are connected to the in-cabinet constant pressure pipe (18) at equal intervals; Water distribution trays (8): A plurality of the water distribution trays (8) are arranged at the top of the sterilization chamber (15), and each water distribution tray (8) is provided with a water storage cavity, and a number of first water leakage holes (21) are provided at the bottom of the water storage cavity, and each water distribution tray (8) corresponds to one diversion pipe (9); A retaining ring (14), which is arranged at the bottom of the water storage cavity, and the diversion pipe (9) is arranged within the retaining ring (14); The diversion pipe (9) is in a U shape, the middle part of the diversion pipe (9) is connected to the in-cabinet constant pressure pipe (18), two retaining rings (14) are arranged on each water distribution tray (8), and the two ends of the U-shaped diversion pipe (9) are respectively arranged within the retaining rings (14), and flow regulating flower plates (13) are respectively arranged at the two end parts of the diversion pipe (9); The circulating water constant pressure system includes: A balance pipe (4), the inlet of which is communicated with the water outlet of the temperature uniformity device; A constant pressure tank (3), the water inlet of which is communicated with the outlet of the balance pipe (4); An out-of-cabinet constant pressure pipe (5), the water outlet of the constant pressure tank (3) is connected to the out-of-cabinet constant pressure pipe (5), the out-of-cabinet constant pressure pipe (5) is connected to the in-cabinet constant pressure pipe (18) through a connecting pipe, and the connecting pipe is hermetically fixed on the side wall of the sterilizer (1).

2. The water bath sterilization temperature, pressure and water distribution system according to claim 1, characterized in that, The water bath sterilization temperature, pressure and uniformity water distribution system further includes: a heating heat exchange device and a refrigerating heat exchange device respectively communicated with the temperature uniformity device.

3. The water bath sterilization temperature, pressure, and uniform water distribution system according to claim 2, wherein There are two of the balance pipe (4) and the constant pressure tank (3), and they are respectively symmetrically arranged on both sides of the temperature uniformity device; the diameter of the balance pipe (4) is set to gradually decrease from the end far from the constant pressure tank (3) to the end close to the constant pressure tank (3).

4. A water bath sterilization temperature, pressure, and uniform water distribution system according to claim 3, characterized in that, The temperature uniformity device includes: A temperature controller (10), which is respectively arranged on the constant pressure tank (3); A temperature balance device (11), which is arranged on the balance pipe (4); A mixing water pipe (12), the water outlet end of which is respectively communicated with the water inlets of the two balance pipes (4).

5. A water bath sterilization temperature, pressure, and uniform water distribution system according to claim 4, characterized in that The heating heat exchange device includes a heating heat exchanger (2) and a first water pump (6). The water inlet end of the first water pump (6) is communicated with the bottom of the sterilizer (1), the water outlet end of the first water pump (6) is connected to the water inlet of the heating heat exchanger (2), and the water outlet of the heating heat exchanger (2) is connected to the water inlet end of the mixing pipe (12).

6. A water bath sterilization temperature, pressure, and uniform water distribution system according to claim 4, wherein The refrigerating heat exchange device includes a refrigerating heat exchanger (7) and a second water pump (20). The water inlet end of the second water pump (20) is communicated with the bottom of the sterilizer (1), the water outlet end of the second water pump (20) is connected to the water inlet of the refrigerating heat exchanger (7), and the water outlet of the refrigerating heat exchanger (7) is connected to the water inlet end of the mixing pipe (12).

7. A water bath sterilization temperature, pressure, and uniform water distribution system according to claim 1, characterized in that, The sterilization rack (16) includes: a plurality of stacked sterilization boxes (22). A placement cavity is provided in the sterilization box (22). The bottom of the sterilization box (22) has a hollow interlayer (25). A plurality of through second water leakage holes (23) are formed in the top wall of the hollow interlayer (25), and a plurality of through third water leakage holes (24) are formed in the bottom wall of the hollow interlayer (25). The aperture of the second water leakage hole (23) is larger than the aperture of the third water leakage hole (24).

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