CN220062499U - Cold trap device, cold trap equipment and freeze dryer - Google Patents

Abstract

The utility model provides a cold trap device, cold trap equipment and a freeze dryer. The cold trap device includes: the trap body is of a cylindrical structure with a containing cavity, and a fluid inlet and a fluid outlet which are communicated with the containing cavity are arranged on the cylindrical structure; the heat exchange coil part is positioned in the accommodating cavity and comprises a plurality of heat exchange tubes which are sequentially communicated, each heat exchange tube extends along the axis of the tubular structure, the plurality of heat exchange tubes are arranged at intervals along the radial direction and/or the circumferential direction of the tubular structure, and the arrangement density of the plurality of heat exchange tubes, which is close to the fluid inlet, is less than that of the plurality of heat exchange tubes, which is close to the fluid outlet. The technical scheme of the utility model solves the problem of low condensation efficiency caused by easy blockage of the inlet of the cold trap in the prior art.

Description

Cold trap device, cold trap equipment and freeze dryer

Technical Field

The utility model relates to the technical field of freeze drying, in particular to a cold trap device, cold trap equipment and a freeze dryer.

Background

The basic principle of the freeze-drying method is a drying method (in which a solvent is usually water) in which a solution or a mixed solute is frozen into a solid under a certain temperature, and then water in the solution is sublimated and removed. Through continuous development for decades, modern freeze drying related technology is becoming more and more perfect, and is widely applied to industries such as food, biology, medicine and the like. The water vapor generated during sublimation of the material is removed during lyophilization by chemisorption (P ₂ O ₅ Anhydrous CaCl ₂ Etc.), pumping (pumping with a vapor jet pump), etc. If the gas containing a large amount of water vapor is discharged by the vacuum pump, the working efficiency and the service life of the vacuum pump can be greatly reduced, and the cold trap can directly condense and remove the water in the gas, so that the problem can be avoided. The medicine freeze dryer for production generally adopts an economic and effective condensation method, namely, water vapor is condensed into ice in a cold trap, after the ice is frozen to a certain thickness or freeze drying is finished, the ice is melted and discharged out of the freeze dryer, and the parts bearing the task are called the cold trap, the water vapor condenser or the water catcher. In detail, the moisture in the air pumped from the drying cavity is captured by the cold condensation water on the surface of the cooled metal, and the water vapor flows from the drying cavity to the cold trap with low pressure, and is frozen and solidified on the surface of the cold trap coil.

The chinese patent publication No. CN105664513a of 2016.06.15 discloses a cold trap for use in a freeze dryer, which includes a housing and a coil group disposed inside the housing, the coil group including an intermediate coil group adapted to the middle of the housing; the middle coil group comprises a plurality of independent middle coil layers, each middle coil layer comprises a middle straight pipe section and a middle bent pipe section, and the middle straight pipe section and the middle bent pipe section are connected to form a middle coil layer; although the water capturing efficiency can be better improved, the air flowing into the cold trap is concentrated due to the fact that the coil pipe mode is single, so that the middle coil pipe is frozen thicker and thicker, and finally the air flow is unsmooth, and the water capturing effect is affected; the chinese patent application publication No. CN217005116U in 2022.07.19 discloses a cold trap and a freeze dryer, the cold trap comprising: the well body comprises a first side wall, and a vacuumizing port is formed in the first side wall so as to vacuumize the interior of the well body; the coil is arranged in the trap body and corresponds to the first side wall, a gap is formed between the coil and the first side wall, and the vacuumizing port is communicated with the gap; the baffle is arranged in the gap and at least partially shields the vacuumizing port, the baffle is provided with a notch, and the vacuumizing port is communicated with the gap through the notch, so that when gas enters the vacuumizing port, the baffle needs to be bypassed, and the gas enters the notch and flows into the vacuumizing port. Although the structure is simpler and can realize the water capturing function so as to remove the water in the air, the arrangement mode of the refrigeration coil is too simple and the space between the two pipes is relatively close, so that part of the coils are frozen more and more thickly, and the influence of the unsmooth air flow on the water capturing effect and the water capturing efficiency are caused.

Therefore, in the prior art, when a large amount of water vapor flows into the cold trap in the drying process, the inlet of the cold trap is frozen more nearby due to low temperature, but the cold trap coil far away from the inlet is frozen less and even not frozen, so that the capability of capturing the water vapor of the front and rear cold trap coils is uneven, along with the drying, the frost on the surface of the refrigeration coil near the inlet is thicker and is gradually close to the inlet, the inlet of the final refrigeration trap is blocked, and the air in the drying cavity cannot enter the cold trap, so that the drying is interrupted, thereby not only affecting the integral quality of the freeze-dried product, but also causing the problems of unnecessary energy, labor waste and lower condensation efficiency.

Disclosure of Invention

The utility model mainly aims to provide a cold trap device, cold trap equipment and a freeze dryer, which are used for solving the problem of low condensation efficiency caused by easy blockage of an inlet of a cold trap in the prior art.

In order to achieve the above object, the present utility model provides a cold trap apparatus comprising: the trap body is of a cylindrical structure with a containing cavity, and a fluid inlet and a fluid outlet which are communicated with the containing cavity are arranged on the cylindrical structure; the heat exchange coil part is positioned in the accommodating cavity and comprises a plurality of heat exchange tubes which are sequentially communicated, each heat exchange tube extends along the axis of the tubular structure, the plurality of heat exchange tubes are arranged at intervals along the radial direction and/or the circumferential direction of the tubular structure, and the arrangement density of the plurality of heat exchange tubes, which is close to the fluid inlet, is less than that of the plurality of heat exchange tubes, which is close to the fluid outlet.

Further, the interval between two adjacent heat exchange tubes is gradually reduced from the fluid inlet to the fluid outlet.

Further, the heat exchange tube is arranged obliquely relative to the axis, and the distance between the heat exchange tube and the axis gradually decreases along the central axis of the cylindrical structure from the fluid inlet to the fluid outlet.

Further, the lengths of the plurality of heat exchange tubes increase in order from the direction closer to the axis in the radial direction of the cylindrical structure.

Further, the cold trap device also includes a gas distributor located between the heat exchange coil portion and the fluid inlet for dispersing fluid entering from the fluid inlet.

Further, the gas distributor has a plurality of guide flow passages which are arranged at intervals around the axis, the guide flow passages are arranged obliquely relative to the axis, and the distance between the guide flow passages and the axis gradually increases along the axis from the fluid inlet to the fluid outlet.

Further, a storage groove is formed in the inner wall of the accommodating cavity, and the cold trap device further comprises a spraying member for cleaning the heat exchange coil part, wherein the spraying member is provided with a storage position stored in the storage groove and a spraying position extending out of the storage groove.

Further, a water outlet communicated with the accommodating cavity is arranged on the trap body, and the water outlet is positioned on the bottom wall of the accommodating cavity; and/or the cross section of the trap body is elliptical, and the cross section is parallel to the axis.

According to another aspect of the utility model, the utility model provides cold trap equipment, which comprises the cold trap device and a high-low temperature integrated machine connected with the cold trap device, wherein the high-low temperature integrated machine is used for controlling the temperature of a heat exchange coil part.

According to another aspect of the present utility model there is provided a freeze dryer comprising a freeze drying structure and a cold trap apparatus as described above connected to the freeze drying structure.

By applying the technical scheme of the utility model, the front-sparse and rear-dense heat exchange tube arrangement form (a plurality of heat exchange tubes close to the fluid inlet are distributed more dispersedly, and a plurality of heat exchange tubes close to the fluid outlet are distributed more intensively) can enable air entering the cold trap from the fluid inlet to be fully contacted with the heat exchange coil pipe part close to the fluid inlet, so that moisture is firstly condensed on the coil pipe close to the fluid inlet, the thickness of ice on the outer wall of the heat exchange tube at the fluid inlet is continuously increased along with the drying process, and after the condensation effect of the heat exchange tube at the fluid inlet is reduced, the air with residual moisture is condensed after passing through the heat exchange tube with larger density close to the fluid outlet, so that the moisture in the air is thoroughly removed, the problems of ice blockage phenomenon generated by the fluid inlet of the cold trap, uneven freezing inside the trap body and the like can be prevented, and the condensation water capacity of the cold trap can be optimized and improved, and the condensation efficiency can be improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a schematic structural view of an embodiment of a cold trap device of the present utility model;

FIG. 2 illustrates a front view of a gas distributor of the cold trap apparatus of FIG. 1;

fig. 3 shows a top view of the gas distributor of fig. 2.

Wherein the above figures include the following reference numerals:

1. a fluid inlet; 2. a trap body; 3. a gas distributor; 31. a guide flow passage; 4. a heat exchange tube; 5. an inlet; 6. an outlet; 7. a spray member; 8. a water outlet; 9. a fluid outlet.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other. The utility model will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1, an embodiment of the present utility model provides a cold trap apparatus. The cold trap device comprises a trap body 2 and a heat exchange coil part. The trap body 2 is of a cylindrical structure with a containing cavity, and a fluid inlet 1 and a fluid outlet 9 which are communicated with the containing cavity are arranged on the cylindrical structure; the heat exchange coil part is positioned in the accommodating cavity and comprises a plurality of heat exchange tubes 4 which are sequentially communicated, each heat exchange tube 4 extends along the axis of the tubular structure, the plurality of heat exchange tubes 4 are arranged at intervals along the radial direction and/or the circumferential direction of the tubular structure, and the arrangement density of the plurality of heat exchange tubes 4 at the position close to the fluid inlet 1 is smaller than that of the plurality of heat exchange tubes 4 at the position close to the fluid outlet 9.

In the above technical solution, the arrangement of the heat exchange tubes 4 with the front and rear dense (the arrangement of the heat exchange tubes 4 near the fluid inlet 1 is more dispersed, and the arrangement of the heat exchange tubes 4 near the fluid outlet 9 is more concentrated) can make the air entering the cold trap from the fluid inlet 1 fully contact with the heat exchange coil portion near the fluid inlet 1, so that the moisture is condensed on the coil portion near the fluid inlet 1, the thickness of the ice on the outer wall of the heat exchange tube 4 at the fluid inlet 1 is continuously increased along with the drying process, after the condensation effect of the heat exchange tube 4 at the fluid inlet 1 is reduced, the air with the residual moisture is condensed after flowing through the heat exchange tube 4 with the relatively high density near the fluid outlet 9, so that the moisture in the air is thoroughly removed, thereby preventing the problems of ice blockage phenomenon generated by the fluid inlet 1 of the cold trap, uneven freezing inside the trap body 2, and the like, and further optimizing and improving the capability of condensing water of the cold trap, so as to improve the condensation efficiency.

Furthermore, the special pipe distribution mode can enlarge the contact area with the gas entering the cold trap, increase the water supplementing capacity of the cold trap, and improve the working efficiency and freeze-drying effect of the cold trap.

In the embodiment of the present utility model, the arrangement density refers to the number of heat exchange tubes 4 per unit cross-sectional area, wherein the cross-section is perpendicular to the axis of the cylindrical structure. I.e. the number of heat exchange tubes 4 per cross-sectional area near the fluid inlet 1 is smaller than the number of heat exchange tubes 4 per cross-sectional area near the fluid outlet 9.

As shown in fig. 1, in the embodiment of the present utility model, the interval between two adjacent heat exchange tubes 4 gradually decreases from the fluid inlet 1 to the fluid outlet 9. Thus, the heat exchange coil part can be arranged in a front-sparse and rear-dense mode.

In the embodiment of the present utility model, the interval between two adjacent heat exchange tubes 4 refers to the interval distance between the central axes of two adjacent heat exchange tubes 4.

Therefore, the embodiment of the utility model provides the cold trap device which has high water catching efficiency, does not generate ice blockage phenomenon and can uniformly condense the moisture in the gas on the heat exchange coil part.

Specifically, in the embodiment of the utility model, gas in the drying cavity enters from the fluid inlet 1 in the freeze drying process, flows through the heat exchange coil part, and moisture in the gas is condensed and frozen after heat exchange of the heat exchange coil part, and then flows out from the fluid outlet 9.

In the embodiment of the utility model, in the drying process, the cooling medium flows from the inlet 5 of the heat exchange coil part to the outlet 6 of the heat exchange coil part after fully circulating through the heat exchange coil part, and is externally connected with a high-low temperature integrated machine for controlling the temperature of the heat exchange tube 4 in the refrigeration trap, and the temperature of the heat exchange coil part is set to be minus 60 ℃ to minus 80 ℃.

It should be noted that, in the embodiment of the present utility model, the front refers to the position near the fluid inlet 1, i.e., the left end in fig. 1, and the rear refers to the position near the fluid outlet 9, i.e., the right end in fig. 1.

Preferably, in an embodiment of the present utility model, the heat exchange coil part further comprises an elbow for connecting two adjacent heat exchange tubes 4. The heat exchange coil portion is preferably a refrigeration coil.

As shown in fig. 1, in the embodiment of the present utility model, the heat exchange tube 4 is disposed obliquely with respect to the axis, and the distance between the heat exchange tube 4 and the axis gradually decreases along the central axis of the cylindrical structure in the direction from the fluid inlet 1 to the fluid outlet 9.

Through the arrangement, the heat exchange coil part is integrally arranged in the accommodating cavity in a horn shape, so that a front-sparse and rear-dense arrangement mode is formed, and air entering a cold trap can be fully contacted with the heat exchange tube 4, and the fluid inlet 1 is prevented from being blocked by ice.

As shown in fig. 1, in the embodiment of the present utility model, the lengths of the plurality of heat exchange tubes 4 sequentially increase from the direction closer to the axis in the radial direction of the cylindrical structure. In this way, the gas dispersed and removed with water can be gradually converged and then discharged out of the cold trap together through the fluid outlet 9, thereby improving the gas discharge efficiency.

Preferably, in the embodiment of the present utility model, the plurality of heat exchange tubes 4 on the same cross section are arranged at uniform intervals in the radial direction and the circumferential direction of the cylindrical structure to form a multi-layered arrangement.

As shown in fig. 1, in the embodiment of the present utility model, the cold trap device further includes a gas distributor 3 between the heat exchange coil part and the fluid inlet 1, and the gas distributor 3 is used for dispersing the fluid entering from the fluid inlet 1.

Through the arrangement, the gas entering the accommodating cavity is divided into a plurality of strands by one strand of fluid after passing through the gas distributor 3 and flows to the heat exchange coil pipe part in the accommodating cavity, wherein the heat exchange coil pipe part is in a front-sparse rear-dense horn shape, so that the fluid inlet 1 of the cold trap can be prevented from generating ice blockage.

As shown in fig. 1 to 3, in the embodiment of the present utility model, the gas distributor 3 has a plurality of guide flow passages 31, the plurality of guide flow passages 31 are arranged at intervals around the axis, the guide flow passages 31 are arranged obliquely with respect to the axis, and the distance between the guide flow passages 31 and the axis gradually increases along the axis from the fluid inlet 1 to the fluid outlet 9.

By the above arrangement, the gas entering from the fluid inlet 1 can be branched by the plurality of guide flow passages 31, spread in the radial direction of the tubular structure, and flow toward the heat exchange coil part, and thus, the occurrence of ice blockage phenomenon in the fluid inlet 1 of the cold trap can be prevented.

Specifically, in the embodiment of the present utility model, the plurality of guide flow passages 31 are arranged at regular intervals around the axis, so that the gas entering the cold trap can be divided into several strands uniformly, and the gas flow can be brought into sufficient contact with the heat exchange coil portion inside the cold trap.

Preferably, in the embodiment of the present utility model, as shown in fig. 2 and 3, the gas distributor has a quadrangle star shape, and is just right-triangular, and the special structure can uniformly split the fluid.

Specifically, in the embodiment of the utility model, the inner wall of the accommodating cavity is provided with the accommodating groove, the cold trap device further comprises a spraying member 7 for cleaning the heat exchange coil part, and the spraying member 7 is provided with an accommodating position accommodated in the accommodating groove and a spraying position extending out of the accommodating groove.

Through the setting, after the drying is finished, the ice condensed on the surface of the heat exchange coil part needs to be removed, the temperature of the high-low temperature integrated machine connected with the cold trap is set to be more than zero, so that the purpose of melting ice is achieved, the condensed ice on the coil part needs to be cleaned and disinfected after being melted, and through the setting of the spraying component 7, when the drying process is finished, the spraying component 7 is contained in the containing groove, and after the drying is finished, the spraying component 7 stretches out of the containing groove to spray the heat exchange coil part, thus, the spraying structure can be prevented from being frozen in the drying process, the problem that the blockage is caused by freezing of water in the nozzle when the cold trap runs at low temperature can be prevented, the problem that cleaning operation can be carried out after the ice on the surface of the cold trap is melted can be prevented, the time can be saved for the cleaning process, and the cleaning and disinfection capacity can be improved.

Preferably, in the embodiment of the present utility model, the spray member 7 is a pop-up rotary spray ball, and the specific structure thereof is that in the prior art, the pop-up rotary spray ball can be purchased directly, when the external pipeline of the pop-up rotary spray ball has no pressure, the pop-up rotary spray ball is flat with the inner wall of the cold trap (i.e. is in the storage tank), when the external pipeline of the pop-up rotary spray ball is full of liquid and reaches a certain pressure, the pop-up rotary spray ball can pop up along with the liquid, and the pop-up rotary spray ball can be rotated for cleaning at 360 degrees, so that the cavity and the coil can be cleaned and sterilized without dead angle.

As shown in fig. 1, in the embodiment of the present utility model, the trap body 2 is provided with a drain port 8 communicated with the accommodating cavity, and the drain port 8 is located on the bottom wall of the accommodating cavity. Thus, the liquid after washing can be discharged through the drain port 8.

In the embodiment of the utility model shown in fig. 1, the cross section of the trapping volume 2 is elliptical and the cross section is parallel to the axis.

Through the arrangement, the whole trap body 2 can be in an elliptical shape, so that on one hand, gas can be well gathered and discharged in the accommodating cavity in the air inlet and exhaust processes, the air exhaust speed can be improved to a certain extent, the drying time is shortened for the whole drying stage, and the energy consumption is reduced; on the other hand, the oval-shaped trap body 2 can well distribute gas in the cavity uniformly, so that the problem that the gas is accumulated and blocked due to thicker icing at part of positions is avoided.

In the actual freeze-drying operation, the drying cavity is pumped by the vacuum pump, gas enters the cold trap from the fluid inlet of the cold trap device, then the gas just entering the cold trap cavity is divided and split by the gas distributor, the gas can be uniformly divided by the special gas distributor structure, and the split gas flow can flow through the surface of the heat exchange coil part in the cold trap. In addition, the special heat exchange coil portion arrangement mode avoids the problem that the cold trap inlet is blocked commonly existing in the cold trap, and in the arrangement mode, the heat exchange coil portion adopts a horn-like arrangement mode with front and rear dense, so that the problem that the ice condensation layer of a refrigeration coil close to the inlet is too thick to cause blocking can be prevented, and the phenomenon that the ice condensation on the surface of the coil is uneven can be avoided. After the drying is finished, the cold trap cavity is required to be disinfected and cleaned, the pop-up rotary spray ball at the top of the cavity can rotate and spray at 360 degrees, and no dead angle in the cavity can be guaranteed to be cleaned and disinfected. The cold trap device can avoid the problem of blockage of the cold trap inlet in the freeze drying process, and can further accelerate the removal speed of moisture in the air, thereby accelerating the drying time, reducing the freeze drying energy consumption and saving the response cost.

The freeze-drying experiment is carried out by adding the cold trap device in the spray freeze-drying process by the person skilled in the art, the heat exchange coil part of the cold trap device is connected with a high-low temperature integrated machine in the experiment process, the fluid inlet and the fluid outlet of the cold trap device are respectively connected with a drying cavity and a vacuum pump, the cold trap device is opened after the experiment is finished, the condensed ice on the surface of the refrigeration coil is uniformly distributed to be uniform in thickness, the phenomenon of ice blockage and the like does not occur at the fluid inlet of the cold trap device, and finally the accommodating cavity is cleaned and disinfected through the pop-up rotary spray ball. Experimental results show that the cold trap device of the embodiment can play a good role in the freeze-drying process, and is strong in water capturing capacity, good in condensation effect and good in cleaning and sterilizing capacity.

Embodiments of the present utility model provide a cold trap apparatus. The cold trap device comprises the cold trap device and a high-low temperature integrated machine connected with the cold trap device, wherein the high-low temperature integrated machine is used for controlling the temperature of the heat exchange coil pipe part.

The cold trap apparatus has all the advantages of the cold trap device and is not described in detail herein.

Embodiments of the present utility model provide a freeze dryer. The freeze dryer comprises the cold trap device described above with the freeze drying structure connected thereto.

Wherein, the fluid inlet of cold trap device communicates with the dry cavity of freeze drying structure, and the fluid outlet of cold trap device communicates with the vacuum pump.

The above-described freeze dryer has all the advantages of the above-described cold trap apparatus, and is not described in detail herein.

From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects: the front-sparse and rear-dense heat exchange tube arrangement mode (a plurality of heat exchange tubes close to the fluid inlet are distributed more dispersedly, and a plurality of heat exchange tubes close to the fluid outlet are distributed more intensively) can enable air entering the cold trap from the fluid inlet to be fully contacted with a heat exchange coil pipe close to the fluid inlet, so that moisture is firstly condensed on the coil pipe close to the fluid inlet, the thickness of ice on the outer wall of the heat exchange tube at the fluid inlet is continuously increased along with the drying process, after the condensation effect of the heat exchange tube at the fluid inlet is reduced, air with residual moisture flows through the heat exchange tube with larger density close to the fluid outlet and is condensed, so that the moisture in the air is thoroughly removed, the problems of ice blockage phenomenon generated by the fluid inlet of the cold trap, uneven freezing inside the trap body and the like can be prevented, and the capability of condensing water of the cold trap can be optimized and improved, and the condensation efficiency is improved.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A cold trap apparatus, comprising:

the trap body (2) is of a cylindrical structure with a containing cavity, and a fluid inlet (1) and a fluid outlet (9) which are communicated with the containing cavity are arranged on the cylindrical structure;

the heat exchange coil pipe part is positioned in the accommodating cavity and comprises a plurality of heat exchange pipes (4) which are sequentially communicated, each heat exchange pipe (4) extends along the axis of the tubular structure, the plurality of heat exchange pipes (4) are arranged at intervals in the radial direction and/or the circumferential direction of the tubular structure, and the arrangement density of the plurality of heat exchange pipes (4) close to the fluid inlet (1) is smaller than that of the plurality of heat exchange pipes (4) close to the fluid outlet (9).

2. Cold-trap device according to claim 1, wherein the spacing between two adjacent heat exchange tubes (4) decreases gradually from the fluid inlet (1) to the fluid outlet (9).

3. Cold trap device according to claim 1, wherein the heat exchange tube (4) is arranged obliquely with respect to the axis, the distance of the heat exchange tube (4) from the axis decreasing gradually in the direction from the fluid inlet (1) to the fluid outlet (9) along the central axis of the tubular structure.

4. Cold trap device according to claim 1, wherein the lengths of the plurality of heat exchange tubes (4) increase in sequence in the radial direction of the tubular structure from a direction closer to the axis.

5. Cold trap device according to any one of claims 1-4, further comprising a gas distributor (3) between the heat exchange coil section and the fluid inlet (1), the gas distributor (3) being adapted to distribute fluid entering from the fluid inlet (1).

6. Cold trap device according to claim 5, wherein the gas distributor (3) has a plurality of guide channels (31), a plurality of the guide channels (31) being arranged at intervals around the axis, the guide channels (31) being arranged obliquely with respect to the axis, along which axis the distance between the guide channels (31) and the axis increases gradually in the direction from the fluid inlet (1) to the fluid outlet (9).

7. Cold trap device according to any one of claims 1-4, characterized in that a receiving groove is provided on the inner wall of the receiving cavity, the cold trap device further comprising a spray member (7) for cleaning the heat exchanging coil portion, the spray member (7) having a receiving position received in the receiving groove and a spray position protruding out of the receiving groove.

8. Cold trap device according to any one of claims 1-4, wherein the trap body (2) is provided with a drain opening (8) communicating with the receiving chamber, the drain opening (8) being located on the bottom wall of the receiving chamber; and/or the number of the groups of groups,

the cross section of the trap body (2) is elliptical, and the cross section is parallel to the axis.

9. Cold trap apparatus comprising a cold trap device according to any one of claims 1 to 8 and a high and low temperature integrated machine connected to the cold trap device for controlling the temperature of the heat exchange coil section.

10. A freeze dryer comprising a freeze drying structure and the cold trap apparatus of claim 9 connected to the freeze drying structure.