Exhaust device of experimental freeze dryer

Abstract

The utility model discloses an experiment freeze dryer exhaust device which comprises a freeze dryer, an air inlet assembly, an air outlet assembly and an air extractor, the freeze dryer comprises a freeze drying box, the air inlet assembly comprises an air inlet pipe, one end of the air inlet pipe extends into the freeze drying box, the other end of the air inlet pipe extends out of the freeze dryer, the air inlet pipe is provided with an electromagnetic valve, and the electromagnetic valve is connected with a first connecting pipe; the air outlet assembly comprises an air outlet pipe, a second connecting pipe and a connecting ring, one end of the air outlet pipe extends into the freeze-drying box, the other end of the air outlet pipe extends out of the freeze dryer, the air outlet pipe is connected with the second connecting pipe, the second connecting pipe is connected with the connecting ring, the freeze dryer is provided with a first exhaust pipe, and the air extractor is provided with a second exhaust pipe. The first exhaust pipe and the second exhaust pipe are connected with a connecting ring, a valve assembly is installed in the connecting ring, the valve assembly has the function of a one-way valve, dry air is injected into the freeze-drying box after freeze-drying is completed, gas in the freeze-drying box is exhausted, and air pollution of the experimental environment after the box is opened is prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to experimental freeze-drying equipment technical field more specifically, relate to a kind of experimental freeze-drying machine exhaust device. BACKGROUND

[0002] In the existing drug experiment, the production of some drugs needs to be realized by water removal, and the common way of water removal of drugs is freeze-drying direction, which is to place the drugs in a low-pressure and low-temperature environment for freeze-drying treatment to remove the moisture in the drugs and obtain dry drug powder particles. However, during the freeze-drying process of the drugs, some components in the drugs will volatilize into the freeze-drying box. When the drugs are taken out after freeze-drying is completed, the air in the freeze-drying box will be released into the environment, causing pollution to the experimental environment. The existing freeze-drying machine does not have the function of air purification in the freeze-drying box, so a technical solution is needed to solve the above problems. SUMMARY

[0003] The utility model aims at overcoming the deficiency of the prior art, can discharge the gas in the freeze-drying box before opening the box, and provides an experimental freeze-drying machine exhaust device.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model discloses an experimental freeze-drying machine exhaust device, which comprises a freeze-drying machine, an air inlet assembly, an air outlet assembly, and a gas extractor. The freeze-drying machine comprises a freeze-drying box. The air inlet assembly comprises an air inlet pipe, one end of which extends into the freeze-drying box, and the other end of which extends out of the freeze-drying machine. An electromagnetic valve is installed at one end of the air inlet pipe outside the freeze-drying machine. The electromagnetic valve is connected to a first connecting pipe, which can introduce dry air. The air outlet assembly comprises an air outlet pipe, a second connecting pipe, and a connecting ring. One end of the air outlet pipe extends into the freeze-drying box, and the other end of the air outlet pipe extends out of the freeze-drying machine. The second connecting pipe is connected to the connecting ring. The freeze-drying machine is provided with a first exhaust pipe, and the gas extractor is provided with a second exhaust pipe. The first exhaust pipe and the second exhaust pipe are connected to the connecting ring. A valve assembly is installed in the connecting ring, which has the function of a one-way valve.

[0006] Further, the air inlet assembly comprises a sealing cover and a fixing ring. The air inlet pipe is fixedly installed on the freeze-drying machine. The sealing cover is sleeved on the air inlet pipe. The sealing cover is located in the freeze-drying box. The air inlet pipe is provided with a step, which abuts against the sealing cover. The sealing cover abuts against the inner wall of the freeze-drying box. The air inlet pipe is provided with a threaded section. The fixing ring is located outside the freeze-drying machine. The fixing ring is threadedly connected to the air inlet pipe. The fixing ring abuts against the outer wall of the freeze-drying machine.

[0007] Further, the sealing cover is funnel-shaped, the small-diameter end of the sealing cover abuts against the step, the large-diameter end of the sealing cover abuts against the sidewall of the freeze-drying box, and the large-diameter end of the sealing cover is provided with a sealing ring.

[0008] Further, the air inlet pipe is higher than the air outlet pipe, one end of the air inlet pipe in the freeze-drying box is directed to the top of the freeze-drying box, and one end of the air outlet pipe in the freeze-drying box is directed to the bottom of the freeze-drying box.

[0009] Further, the connecting ring is provided with a connecting seat, the second connecting pipe is connected to one end of the connecting seat outside the connecting ring, the valve assembly is located in the connecting ring, and the valve assembly is installed at one end of the connecting seat inside the connecting ring.

[0010] Further, the valve assembly comprises a valve seat and a baffle, the valve seat is installed on the connecting ring, the valve seat is provided with an air port, and the baffle is rotatably installed on the valve seat and can open or close the air port.

[0011] Further, the air port is obliquely arranged, the air port is located on the side of the valve seat directed to the second air outlet pipe, and the rotation axis center of the baffle is located at the lower end of the air port.

[0012] Further, the valve seat is provided with a stop rod, the baffle is provided with a guide rod, the stop rod is provided with a guide hole, the guide rod passes through the guide hole and can slide along the guide hole, the guide rod is arc-shaped, the arc center of the guide rod coincides with the rotation center of the baffle, the guide rod is sleeved with a spring, one end of the spring abuts against the stop rod, and the other end of the spring abuts against the baffle.

[0013] The utility model discloses the beneficial effects are:

[0014] The utility model discloses after freeze drying is completed, opens electromagnetic valve, injects dry air in freeze drying box, makes freeze drying box pressure increase, and dry air extrudes the original gas in freeze drying box to the direction of air outlet pipe, and the valve assembly receives pressure and opens baffle, and along with the traction of air extractor, the gas in freeze drying box is discharged, prevents the air pollution of experimental environment after opening the box. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a sectional view of the embodiment.

[0016] Figure 2 It is a sectional view of the embodiment.

[0017] Figure 3 It is Figure 2 The enlarged view of A in the middle. The utility model discloses a freeze-drying box, which comprises a freeze-drying box body, a first air inlet pipe, a second air inlet pipe, a first air outlet pipe, a second air outlet pipe, a connecting ring, a valve assembly and a connecting ring.

[0018] Figure 4 For Figure 2 Enlarged view at B.

[0019] Fig. 1, freeze dryer; 11, freeze drying box; 12, first exhaust pipe; 2, air inlet assembly; 21, air inlet pipe; 211, step; 212, threaded section; 22, electromagnetic valve; 23, first connecting pipe; 24, sealing cover; 241, sealing ring; 25, fixing ring; 3, air outlet assembly; 31, air outlet pipe; 32, second connecting pipe; 33, connecting ring; 331, connecting seat; 34, valve assembly; 341, valve seat; 3411, air port; 3412, stop lever; 3413, guide hole; 342, baffle; 3421, guide rod; 3422, spring; 4, air extractor; 41, second exhaust pipe. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments, obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] As Figure 1 , Figure 2 shown, the embodiment discloses an experimental freeze dryer exhaust device, including freeze dryer 1, air inlet assembly 2, air outlet assembly 3, air extractor 4, freeze dryer 1 includes freeze drying box 11, freeze drying box 11 is in the process of freeze drying in low pressure low temperature environment, when freeze drying is completed, will carry out pressure increase and temperature rise to the inside of freeze drying box 11 to open the door, the device is started before opening the door, air inlet assembly 2 includes air inlet pipe 21, one end of air inlet pipe 21 extends into freeze drying box 11, the other end of air inlet pipe 21 extends freeze dryer 1, air inlet assembly 2 includes sealing cover 24, fixing ring 25, air inlet pipe 21 is fixedly installed in freeze dryer 1, sealing cover 24 is sleeved on air inlet pipe 21, sealing cover 24 is located in freeze drying box 11, air inlet pipe 21 is equipped with step 211, step 211 is in contact with sealing cover 24, sealing cover 24 is in contact with the inner wall of freeze drying box 11, air inlet pipe 21 is equipped with threaded section 212, fixing ring 25 is located outside freeze dryer 1, fixing ring 25 and air inlet pipe 21 are threadedly connected, fixing ring 25 is in contact with the outer wall of freeze dryer 1, air inlet pipe 21 is passed through the part with threaded section 212 from freeze drying box 11 when installation, air inlet pipe 21 is fixed by rotating fixing ring 25.

[0022] As Figure 3As shown, more preferably, the sealing cover 24 is in the shape of a funnel, the small diameter end of the sealing cover 24 abuts against the step 211, and the large diameter end of the sealing cover 24 abuts against the sidewall of the freeze-drying box 11, and the large diameter of the sealing cover 24 is provided with a sealing ring 241, the funnel-shaped sealing cover 24 can be better supported and sealed, and the sealing ring 241 is deformed by the tension of the tightening of the fixing ring 25 to achieve the sealing effect.

[0023] The inlet pipe 21 is provided at one end outside the freeze-drying machine 1 with an electromagnetic valve 22, which can control the opening of the dry air into the freeze-drying box 11, the electromagnetic valve 22 is connected to a first connecting pipe 23, which can pass in dry air, the electromagnetic valve 22 can control the opening of the dry air into the freeze-drying box 11, to ensure that the inside of the freeze-drying box 11 meets the dryness requirement of the experiment, and prevent frost from occurring inside.

[0024] The outlet assembly 3 includes an outlet pipe 31, a second connecting pipe 32, and a connecting ring 33, one end of the outlet pipe 31 extends into the freeze-drying box 11, the other end of the outlet pipe 31 extends out of the freeze-drying machine 1, and the fixing method of the outlet pipe 31 on the freeze-drying machine 1 is the same as that of the inlet pipe 1, the inlet pipe 21 is higher than the outlet pipe 31, the end of the inlet pipe 21 inside the freeze-drying box 11 is directed towards the top of the freeze-drying box 11, and the end of the outlet pipe 31 inside the freeze-drying box 11 is directed towards the bottom of the freeze-drying box 11, when the electromagnetic valve 22 is opened to send in dry air, the dry air starts to fill from the top of the freeze-drying box 11, which can push out the original gas in the freeze-drying box 11 from the outlet pipe 31, reducing the gas generated by freeze-drying in the freeze-drying box 11.

[0025] The outlet pipe 31 is connected to the second connecting pipe 32 at one end outside the freeze-drying machine 1, the second connecting pipe 32 is connected to the connecting ring 33, the freeze-drying machine 1 is provided with a first exhaust pipe 12, and the air extractor 4 is provided with a second exhaust pipe 41, the original air extractor 4 is used for exhausting and dissipating heat of the freeze-drying machine 1, the first exhaust pipe 12 and the second exhaust pipe 41 are connected to the connecting ring 33, the connecting ring 33 is provided with a connecting seat 331, the second connecting pipe 32 is connected to one end of the connecting seat 331 outside the connecting ring 33, a valve assembly 34 is located inside the connecting ring 33, the valve assembly 34 is installed at one end of the connecting seat 331 inside the connecting ring 33, the outlet pipe 31 is connected to the second exhaust pipe 41 of the air extractor 4 through the second connecting pipe 32, and the same air extractor 4 is used for exhausting, and the exhaust is directed to the flue through the air extractor 4.

[0026] As Figure 4As shown, the valve assembly 34 has the function of a one-way valve, and the valve assembly 34 comprises a valve seat 341 and a baffle 342, the valve seat 341 is installed on the connecting ring 33, the valve seat 341 is provided with a gas port 3411, the gas port 3411 is obliquely arranged, and the gas port 3411 is located on the side of the valve seat 341 facing the second exhaust pipe 41, so as to prevent the gas passing through the connecting ring 33 from entering the second connecting pipe 32, the rotation axis center of the baffle 342 is located at the lower end of the gas port 3411, the baffle 342 is rotatably installed on the valve seat 341, and the baffle 342 can open or close the gas port 3411, when the electromagnetic valve 22 is opened to send dry air, the pressure in the freeze-drying box 11 increases, when the pressure in the freeze-drying box 11 is greater than the force of the baffle 342 closing the gas port 3411, the baffle 342 rotates to open the gas port 3411, so that the freeze-drying box 11 and the air extractor 4 are communicated, and the air extractor 4 can exhaust the gas in the freeze-drying box 11.

[0027] The valve seat 341 is provided with a stop rod 3412, the baffle 342 is provided with a guide rod 3421, the stop rod 3412 is provided with a guide hole 3413, the guide rod 3421 passes through the guide hole 3413, the guide rod 3421 can slide along the guide hole 3413, the guide rod 3421 is in the shape of an arc, the arc center of the guide rod 3421 coincides with the rotation center of the baffle 342, the guide rod 3421 plays a guiding role in the rotation of the baffle 342, the guide rod 3421 is sleeved with a spring 3422, one end of the spring 3422 abuts against the stop rod 3412, the other end of the spring 3422 abuts against the baffle 342, and the spring 3422 can support the baffle 342 to keep close to the gas port 3411, when the freeze-drying box 11 is in a low-pressure state during freeze-drying, the baffle 342 can be adsorbed at the gas port 3411, and the gas port 3411 is closed.

[0028] The above only describes preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-described embodiments, and any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. An experimental freeze-dryer exhaust apparatus, characterized by, The application relates to a freeze-drying machine, which comprises a freeze-drying machine (1), an air inlet assembly (2), an air outlet assembly (3) and a vacuum pump (4), wherein the freeze-drying machine (1) comprises a freeze-drying box (11), the air inlet assembly (2) comprises an air inlet pipe (21), one end of the air inlet pipe (21) extends into the freeze-drying box (11), the other end of the air inlet pipe (21) extends out of the freeze-drying machine (1), an electromagnetic valve (22) is arranged at the end of the air inlet pipe (21) outside the freeze-drying machine (1), the electromagnetic valve (22) is connected with a first connecting pipe (23), the first connecting pipe (23) can be connected with dry air, the air outlet assembly (3) comprises an air outlet pipe (31), a second connecting pipe (32) and a connecting ring (33), one end of the air outlet pipe (31) extends into the freeze-drying box (11), the other end of the air outlet pipe (31) extends out of the freeze-drying machine (1), the second connecting pipe (32) is connected with the connecting ring (33), the freeze-drying machine (1) is provided with a first exhaust pipe (12), the vacuum pump (4) is provided with a second exhaust pipe (41), the first exhaust pipe (12) and the second exhaust pipe (41) are connected with the connecting ring (33), a valve assembly (34) is arranged in the connecting ring (33), and the valve assembly (34) has the function of a one-way valve.

2. The exhaust apparatus for a freeze-dryer as claimed in claim 1, wherein The air inlet assembly (2) comprises a sealing cover (24) and a fixing ring (25), the air inlet pipe (21) is fixedly arranged in the freeze-drying machine (1), the sealing cover (24) is arranged on the air inlet pipe (21), the sealing cover (24) is arranged in the freeze-drying box (11), the air inlet pipe (21) is provided with a step (211), the step (211) abuts against the sealing cover (24), the sealing cover (24) abuts against the inner wall of the freeze-drying box (11), the air inlet pipe (21) is provided with a threaded section (212), the fixing ring (25) is arranged outside the freeze-drying machine (1), the fixing ring (25) is screwed with the air inlet pipe (21), and the fixing ring (25) abuts against the outer wall of the freeze-drying machine (1).

3. The exhaust apparatus for a freeze-dryer as claimed in claim 2, wherein The sealing cover (24) is in the shape of a funnel, the small-diameter end of the sealing cover (24) abuts against the step (211), and the large-diameter end of the sealing cover (24) abuts against the side wall of the freeze-drying box (11), wherein the large-diameter end of the sealing cover (24) is provided with a sealing ring (241).

4. The exhaust system for a freeze-dryer as defined in claim 1, wherein The air inlet pipe (21) is higher than the air outlet pipe (31), one end of the air inlet pipe (21) in the freeze-drying box (11) is directed towards the top of the freeze-drying box (11), and one end of the air outlet pipe (31) in the freeze-drying box (11) is directed towards the bottom of the freeze-drying box (11).

5. The exhaust system of claim 1, wherein the exhaust system is an exhaust system of a laboratory freeze dryer. The connecting ring (33) is provided with a connecting seat (331), one end of the second connecting pipe (32) is connected to the connecting seat (331) outside the connecting ring (33), and the valve assembly (34) is located in the connecting ring (33) and is installed at one end of the connecting seat (331) inside the connecting ring (33).

6. The exhaust system of claim 1, wherein: The valve assembly (34) comprises a valve seat (341) and a baffle (342), the valve seat (341) is installed on the connecting ring (33), the valve seat (341) is provided with a gas port (3411), and the baffle (342) is rotatably installed on the valve seat (341) and can open or close the gas port (3411).

7. An exhaust system for a laboratory freeze dryer as defined in claim 6, wherein The gas port (3411) is obliquely arranged, the gas port (3411) is located on one side of the valve seat (341) facing the second exhaust pipe (41), and the rotation axis center of the baffle (342) is located at the lower end of the gas port (3411).

8. The exhaust system of claim 6, wherein the exhaust system is configured to be used in an experimental freeze dryer. The valve seat (341) is provided with a stop rod (3412), the baffle (342) is provided with a guide rod (3421), the stop rod (3412) is provided with a guide hole (3413), the guide rod (3421) penetrates through the guide hole (3413), the guide rod (3421) can slide along the guide hole (3413), the guide rod (3421) is in the shape of a circular arc, the circular arc center of the guide rod (3421) coincides with the rotation center of the baffle (342), the guide rod (3421) is sleeved with a spring (3422), one end of the spring (3422) abuts against the stop rod (3412), and the other end of the spring (3422) abuts against the baffle (342).

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