A multi-chamber temperature-adjustable dewar
By introducing a cold source chamber, a sample chamber, and a height adjuster into the Dewar jar, combined with an insulation layer and a temperature sensor, the problem of large Dewar jars being unable to independently control the temperature is solved, achieving flexible temperature adjustment of the sample chamber and energy-saving effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIHUA LAB
- Filing Date
- 2023-12-18
- Publication Date
- 2026-08-04
AI Technical Summary
Existing large Dewar jars cannot control the refrigeration temperature of multiple sample chambers separately, and the large volume and weight of the jar lid result in significant heat loss when storing and retrieving samples.
A multi-chamber adjustable temperature Dewar jar is designed, which adopts a cold source chamber, a sample chamber, an elastic insulation layer and a height adjuster. By adjusting the distance between the sample chamber and the cold source chamber, combined with temperature sensors and control devices, independent temperature control can be achieved, and the insulation structure of the jar body and lid can be optimized.
Independent temperature control of different sample chambers was achieved, reducing cold source loss, improving sample management efficiency, and reducing energy consumption and equipment failure rate.
Smart Images
Figure CN117739573B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of cryogenic storage equipment, and in particular to a multi-chamber adjustable temperature Dewar jar. Background Technology
[0002] A Dewar flask is a super-vacuum insulated stainless steel pressure vessel used for cryopreservation of biological samples. When used as a large storage container, a Dewar flask can receive samples of various shapes and volumes. Compared to using multiple small Dewar flasks simultaneously, using a single large Dewar flask can effectively save energy and improve sample management efficiency.
[0003] While current Dewar flasks have multiple sample chambers, the refrigeration temperature in each chamber is the same and cannot be controlled individually. Different samples require different optimal refrigeration temperatures, but current Dewar flasks do not offer a variety of refrigeration temperatures for different samples.
[0004] Furthermore, due to the large volume of the large Dewar jars, the sampling opening is also correspondingly large, and the lid is also large in volume and weight. When storing or retrieving samples, the process of opening or closing the lid is lengthy, resulting in a large amount of heat entering and significant loss of cold source.
[0005] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention
[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a multi-chamber adjustable temperature Dewar jar, which aims to solve the technical problem that the temperature of multiple sample chambers in large Dewar jars cannot be controlled separately in the prior art.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] This invention provides a multi-chamber adjustable temperature Dewar jar, comprising: a jar body, wherein the jar body is provided with a first outer shell and multiple layers of first insulation layers sequentially from the outside to the inside; a jar lid, the jar lid covering the top opening of the jar body; a cold source compartment, the cold source compartment being disposed at the bottom of the jar body for storing a cold source; multiple sample compartments, the sample compartments being disposed within the jar body and above the cold source compartment; each sample compartment being provided with a compartment lid; an elastic insulation layer, the elastic insulation layer being disposed between the cold source compartment and the sample compartment; and multiple height adjusters, the height adjusters being fixedly connected to the top of the sample compartment for adjusting the distance between the sample compartment and the cold source compartment.
[0009] The multi-chamber adjustable temperature Dewar jar, wherein the sample chamber includes a heat-conducting barrel, a second heat insulation layer, and a second outer shell; the second heat insulation layer and the second outer shell are fixed to the outer side of the outer wall of the heat-conducting barrel from the inside to the outside; the bottom surface of the heat-conducting barrel is in contact with the top of the elastic heat insulation layer.
[0010] The multi-chamber adjustable temperature Dewar jar, wherein the jar lid is provided with a third outer shell and multiple layers of third heat insulation layer from the outside to the inside.
[0011] The multi-chamber adjustable temperature Dewar flask has multiple cold source release holes on the top of its inner wall, located above the sample chamber. The cold source release holes are connected to the cold source chamber via release pipes, which are located inside the flask wall.
[0012] The multi-chamber adjustable temperature Dewar jar has a fourth heat insulation layer at the bottom of the jar lid. The fourth heat insulation layer is inserted into the jar body and blocks the cold source release hole.
[0013] The multi-chamber adjustable temperature Dewar flask, wherein the height adjuster is fixed inside the flask and located above the sample chamber.
[0014] The multi-chamber adjustable temperature Dewar flask further includes a control device and multiple temperature sensors. The multiple temperature sensors are respectively disposed in multiple sample chambers and electrically connected to the control device; the multiple height adjusters are electrically connected to the control device.
[0015] The multi-chamber adjustable temperature Dewar jar includes a vertical rod in the middle of the jar body; the bottom of the vertical rod is fixedly connected to the top of the cold source chamber, and its upper part passes through an elastic insulation layer; multiple sample chambers are arranged circumferentially around the vertical rod; multiple vertically extending racks are arranged circumferentially on the side of the vertical rod; each sample chamber is movably connected to a gear on the side facing the vertical rod; the gear meshes with the rack.
[0016] The multi-chamber adjustable temperature Dewar flask, wherein the chamber cover includes a fifth heat insulation layer and a heat-conducting layer arranged sequentially from top to bottom.
[0017] The multi-chamber adjustable temperature Dewar jar, wherein the height adjuster is an electric telescopic rod, which is fixedly connected to the first insulation layer, the telescopic end of the electric telescopic rod faces downward and moves in the vertical direction; the telescopic end of the electric telescopic rod is inserted into the second insulation layer and is fixedly connected to the second insulation layer and the second outer shell.
[0018] Beneficial effects:
[0019] This invention provides a multi-chamber adjustable temperature Dewar jar. The multi-chamber adjustable temperature Dewar jar provides a cold source with a fixed temperature through a cold source chamber. The closer the temperature of the cold source chamber is to the sample chamber, the lower the storage temperature of the sample chamber. By adjusting the distance between different sample chambers and the cold source chamber through multiple height adjusters, different sample chambers can be made to have different storage temperatures. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of the multi-chamber adjustable temperature Dewar jar provided by the present invention.
[0021] Figure 2 This is a schematic diagram of the internal structure of a multi-chamber adjustable temperature Dewar flask.
[0022] Figure 3 This is a schematic diagram of the sample chamber.
[0023] Figure 4 This is a schematic diagram of the structure of the bin cover.
[0024] Figure 5 This is a schematic diagram showing the connection relationship between the vertical rod, rack, gear, and sample chamber.
[0025] Explanation of main component symbols: 1-Tank body, 2-Tank cover, 3-Cold source compartment, 4-Sample compartment, 5-Elastic insulation layer, 6-Height adjuster, 41-Heat conduction barrel, 42-Second insulation layer, 43-Compartment cover, 11-First outer shell, 12-First insulation layer, 21-Third insulation layer, 13-Cold source release hole, 14-Release pipe, 22-Fourth insulation layer, 7-Vertical rod, 71-Rack, 44-Gear, 431-Fifth insulation layer, 432-Heat conduction layer, 8-Vertical support rod, 31-Support plate, 32-Cold source addition pipe, 9-Control device. Detailed Implementation
[0026] This invention provides a multi-chamber adjustable temperature Dewar flask. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the invention.
[0027] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.
[0028] Please see Figures 1-2 The present invention provides a multi-chamber adjustable temperature Dewar flask, comprising:
[0029] Tank 1, wherein the tank 1 is provided with a first outer shell 11 and multiple layers of first heat insulation layer 12 from the outside to the inside;
[0030] Can lid 2, the can lid 2 covering the top opening of the can body 1;
[0031] Cold source compartment 3, which is located at the bottom of the tank body 1, is used to store cold source;
[0032] Multiple sample chambers 4 are disposed inside the tank body 1 and above the cold source chamber 3; each sample chamber 4 is provided with a chamber cover 43.
[0033] An elastic heat insulation layer 5 is disposed between the cold source chamber 3 and the sample chamber 4;
[0034] Multiple height adjusters 6 are fixedly connected to the top of the sample chamber 4 and are used to adjust the distance between the sample chamber 4 and the cold source chamber 3.
[0035] The multi-chamber adjustable temperature Dewar flask of this invention can use liquid nitrogen as a cold source. The temperature of liquid nitrogen is -196°C. Most samples do not require very low storage temperatures, so a certain distance needs to be maintained between the sample chamber 3 and the cold source chamber 3. The greater the distance, the higher the temperature at the bottom of the cold source chamber 3. The room temperature environment above the lid 2 serves as a heat source. The sample chamber 4 is located between the cold source and the heat source, and its temperature range is between the two.
[0036] By adjusting the height of multiple sample chambers 4 using multiple height adjusters 6, the distance from each sample chamber 4 to the cold source chamber 3 can be adjusted, resulting in different bottom temperatures for each sample chamber 4. When combined with a relatively fixed heat source temperature, different storage temperatures can be achieved within each sample chamber 4.
[0037] The elastic heat insulation layer 5 is used to prevent the bottom temperature of the sample chamber 4 from becoming too low. When the height of the sample chamber 4 changes, the elastic heat insulation layer 5 can elastically expand and contract accordingly. Specifically, the elastic heat insulation layer 5 is made of a material with low thermal conductivity. The greater the thickness and the lower the thermal conductivity of the elastic heat insulation layer 5, the higher the temperature at the bottom of the sample chamber 4 will be.
[0038] Specifically, the cold source compartment 3 is also connected to a cold source adding pipe 32, which is disposed in the tank wall of the tank body 1 and extends upward along the tank wall. The inlet of the cold source adding pipe 32 is disposed on the outer wall of the tank body 1. More specifically, the cold source adding pipe 32 is sandwiched within multiple layers of the first insulation layer 12.
[0039] Preferably, in the tank body 1, the first outer shell 11 is made of metal to provide good protection; the multi-layer first heat insulation layer 12 can be made of a combination of various materials with low thermal conductivity to prevent heat from entering through the tank body 1. Specifically, the bottom of the tank body 1 is also provided with a multi-layer first heat insulation layer 12.
[0040] Specifically, thermal insulation material can be installed between adjacent sample chambers 4, which can also reduce the amount of heat reaching the cold source chamber 3 through the gaps between the sample chambers 4.
[0041] Specifically, the cold source compartment 3 is equipped with multiple support plates 31 to provide support.
[0042] Please see Figure 3 Preferably, the sample chamber 4 includes a heat-conducting barrel 41, a second heat insulation layer 42, and a second outer shell; the second heat insulation layer 42 and the second outer shell are fixed sequentially to the outer side of the outer wall of the heat-conducting barrel 41 from the inside to the outside; the bottom surface of the heat-conducting barrel 41 is in contact with the top of the elastic heat insulation layer 5. The heat-conducting barrel 41 is made of a material with high thermal conductivity, which quickly transfers the low temperature at the bottom to the entire sample chamber 4, keeping the temperature inside the sample chamber 4 relatively uniform and reducing the temperature difference between the top and the bottom. The second heat insulation layer 42 is used to keep the temperature of each sample chamber 4 stable and to prevent the temperatures of different sample chambers 4 from affecting each other.
[0043] Please see Figure 2 Preferably, the can lid 2 is provided with a third outer shell and multiple layers of third heat insulation layer 21 from the outside to the inside.
[0044] Preferably, the top surface of the compartment cover 43 is marked to facilitate the identification of different sample compartments 4.
[0045] The second and third outer shells can also be made of metal and serve as supports; while the second heat insulation layer 42 and the third heat insulation layer 21 can be made of materials with low thermal conductivity.
[0046] Please see Figure 1 and Figure 2 Preferably, the inner wall of the tank 1 is provided with a plurality of cold source release holes 13, which are located above the sample chamber 4; the cold source release holes 13 are connected to the cold source chamber 3 through a release pipe 14; the release pipe 14 is disposed inside the tank wall of the tank 1. After the tank lid 2 is opened, the cold source, such as liquid nitrogen, will evaporate and be released above the sample chamber 4, forming a heat insulation area, which can reduce the temperature rise at the top of the sample chamber 4.
[0047] Please see Figure 2Preferably, a fourth heat insulation layer 22 is provided at the bottom of the can lid 2. The fourth heat insulation layer 22 is inserted into the can body 1 and blocks the cold source release hole 13. The fourth heat insulation layer 22 is used to increase the heat insulation effect of the can lid 2 and to block the cold source release hole 13 when closed, so as to prevent the cold source from evaporating and being released above the sample chamber 4.
[0048] Please see Figure 1 Preferably, the height adjuster 6 is fixed inside the tank body 1 and located above the sample chamber 4. Specifically, the height adjuster 6 is located below the tank cover 2. The height adjuster 6 is positioned above the sample chamber 4, where the temperature environment is relatively high, thus avoiding the impact of low temperatures on its operation.
[0049] Please see Figure 1 Preferably, the multi-chamber adjustable temperature Dewar flask further includes a control device 9 and multiple temperature sensors. The multiple temperature sensors are respectively disposed within multiple sample chambers 4 and electrically connected to the control device 9; the multiple height adjusters 6 are also electrically connected to the control device 9. By providing real-time feedback on the temperature within the refrigeration chamber through the temperature sensors, the control device 9 can promptly adjust the height adjusters 6 to ensure stable storage temperature.
[0050] The multi-chamber adjustable temperature Dewar jar of the present invention uses a fixed cold source, eliminating the need for long-term refrigeration, which can effectively reduce energy consumption during operation, and also has better stability and a low equipment failure rate.
[0051] Please see Figure 5 Preferably, a vertical rod 7 is provided in the middle of the tank body 1; the bottom of the vertical rod 7 is fixedly connected to the top of the cold source chamber 3, and its upper part passes through the elastic heat insulation layer 5; multiple sample chambers 4 are arranged circumferentially around the vertical rod 7; multiple vertically extending racks 71 are arranged circumferentially on the side of the vertical rod 7; each sample chamber 4 is movably connected to a gear 44 on the side facing the vertical rod 7; the gear 44 meshes with the racks 71. The vertical rod 7, racks 71 and gears 44 are used to make the sample chambers 4 move more smoothly when the height changes, reducing friction.
[0052] Please see Figure 4 Preferably, the lid 43 includes a fifth heat insulation layer 431 and a heat-conducting layer 432 arranged sequentially from top to bottom. The heat-conducting layer 432 is made of a high thermal conductivity material. Specifically, the high thermal conductivity material can be made of materials with high thermal conductivity such as stainless steel. The temperature of the lid 43 can be kept as consistent as possible with the temperature of the heat-conducting barrel 41 of the sample chamber 4, thereby reducing the temperature difference between the top and bottom of the sample chamber 4. After the lid 2 is opened, the fifth heat insulation layer 431 can reduce the amount of heat entering the sample chamber 4, which does not need to be opened.
[0053] Please see Figure 2 and Figure 5 Preferably, the height adjuster 6 is an electric telescopic rod, fixedly connected to the first heat insulation layer 12. The telescopic end of the electric telescopic rod faces downward and moves in the vertical direction. The telescopic end of the electric telescopic rod is inserted into the second heat insulation layer 42 and fixedly connected to the second heat insulation layer 42 and the second outer shell. Specifically, a portion of the cylinder of the electric telescopic rod is embedded in the first heat insulation layer 12 to reduce the space occupied inside the tank 1.
[0054] To enhance the supporting effect, multiple vertical support rods 8 can be installed within the multi-layer second insulation layer 42, and the fixed end of the height adjuster 6 is fixedly connected to the vertical support rods 8. The vertical support rods 8 extend vertically to the bottom of the tank body 1.
[0055] In summary, the multi-chamber adjustable temperature Dewar jar provided by this invention can flexibly adjust the temperature of multiple sample chambers 4 by changing the distance between the sample chamber 4 and the cold source chamber 3, thereby obtaining multiple storage temperatures. The entire process only requires a cold source with a fixed temperature, which is environmentally friendly and energy-saving. Furthermore, it uses fewer electrical components, has a low failure rate, and is highly reliable.
[0056] It is understood that those skilled in the art can make equivalent substitutions or modifications to the technical solution and inventive concept of the present invention, and all such substitutions or modifications should fall within the protection scope of the appended claims.
Claims
1. A multi-chamber adjustable temperature Dewar flask, characterized in that, include: The tank body, from the outside to the inside, is provided with a first outer shell and multiple layers of first heat insulation layers; A can lid that covers the top opening of the can body; A cold storage compartment is located at the bottom of the tank and is used to store cold sources. Multiple sample chambers are provided inside the tank and above the cold source chamber; each sample chamber is provided with a cover. An elastic thermal insulation layer is disposed between the cold source chamber and the sample chamber; Multiple height adjusters are fixedly connected to the top of the sample chamber and are used to adjust the distance between the sample chamber and the cold source chamber. The can lid is provided with a third outer shell and multiple layers of third heat insulation layer from the outside to the inside; The top of the inner wall of the tank is provided with multiple cold source release holes, which are located above the sample chamber; the cold source release holes are connected to the cold source chamber through release pipes; the release pipes are located inside the tank wall; The bottom of the can lid is provided with a fourth heat insulation layer, which is inserted into the can body and blocks the cold source release hole.
2. The multi-chamber adjustable temperature Dewar flask according to claim 1, characterized in that, The sample chamber includes a heat-conducting barrel, a second heat insulation layer, and a second outer shell; the second heat insulation layer and the second outer shell are fixed to the outer side of the outer wall of the heat-conducting barrel from the inside to the outside; the bottom surface of the heat-conducting barrel is in contact with the top of the elastic heat insulation layer.
3. The multi-chamber adjustable temperature Dewar flask according to claim 2, characterized in that, The height adjuster is fixed inside the tank and located above the sample chamber.
4. The multi-chamber adjustable temperature Dewar flask according to claim 1, characterized in that, It also includes a control device and multiple temperature sensors, the multiple temperature sensors being respectively disposed in multiple sample chambers and electrically connected to the control device; the multiple height adjusters are electrically connected to the control device.
5. The multi-chamber adjustable temperature Dewar flask according to claim 2, characterized in that, A vertical rod is provided in the middle of the tank body; the bottom of the vertical rod is fixedly connected to the top of the cold source chamber, and its upper part passes through the elastic heat insulation layer; multiple sample chambers are arranged circumferentially around the vertical rod; multiple vertically extending racks are arranged circumferentially on the side of the vertical rod; each sample chamber is movably connected to a gear on the side facing the vertical rod; the gear meshes with the rack.
6. The multi-chamber adjustable temperature Dewar flask according to claim 2, characterized in that, The compartment cover includes a fifth heat insulation layer and a heat-conducting layer arranged sequentially from top to bottom.
7. The multi-chamber adjustable temperature Dewar flask according to claim 5, characterized in that, The height adjuster is an electric telescopic rod, which is fixedly connected to the first heat insulation layer. The telescopic end of the electric telescopic rod faces downward and moves in the vertical direction. The telescopic end of the electric telescopic rod is inserted into the second heat insulation layer and is fixedly connected to the second heat insulation layer and the second outer shell.