Dewar structure
By setting up a protrusion and air chamber on the Dewar shell, placing a getter assembly, and using the induction coil to activate the heating ring, the problem of the existing Dewar structure is solved, and the miniaturization and suction of the Dewar structure are achieved Effective activation of the agent reduces structural complexity and leakage risk.
Patent Information
- Application Number
- CN202323564602.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2033-12-26
AI Technical Summary
The existing Dewar structure needs to reserve space for installation of getter, resulting in a larger overall structure and difficult to miniaturize.
By setting up a projection on the Dewar shell, setting an air chamber inside, placing a getter assembly, including a fixing seat, getter body, heating ring and activation assembly, the heating ring is activated by the induction coil and controller to achieve air suction The external activation of the agent avoids the use of the interior space of the Dewar shell.
The miniaturization of the Dewar structure is achieved, reducing structural complexity and leakage risks, while ensuring effective activation of getter and maintenance of vacuum.
Smart Images
Figure CN222258480U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of detector technology, and in particular to a Dewar structure. Background Art
[0002] The infrared detector's dewar is used to provide the vacuum working environment required by the chip, and its vacuum life is a reliability indicator of the infrared detector's dewar. In order to ensure the reliability of the infrared detector's vacuum degree and reduce the problem of reduced vacuum degree caused by material outgassing, an activatable getter is generally installed in the dewar to absorb the gas released by the internal materials of the dewar assembly, thereby ensuring the vacuum degree of the infrared detector's dewar.
[0003] In the existing dewar structure, in order to ensure the installation of the getter, it is necessary to leave enough internal space inside the dewar, which makes the overall structure of the dewar shell larger, which is not conducive to the miniaturization of the dewar. Utility Model Content
[0004] In view of this, the purpose of the present application is to provide a dewar structure to solve the problem that the existing dewar structure is too large.
[0005] In order to achieve the above technical objectives, the present application provides a Dewar structure, including: a Dewar shell and a getter assembly;
[0006] The Dewar shell is provided with a protrusion;
[0007] The protrusion is provided with an air chamber connected to the interior of the Dewar shell;
[0008] The getter assembly is disposed in the air chamber.
[0009] Further, the getter assembly comprises: a fixing seat, a getter body and a heating coil;
[0010] The fixing seat is arranged in the air chamber;
[0011] The getter body is arranged on the fixing seat;
[0012] The heating coil is sleeved on the getter body.
[0013] Further, it also includes: activating the component;
[0014] The activation component is sleeved on the protrusion and is used for activating the heating coil.
[0015] Further, the activation component includes an induction coil and a controller;
[0016] The coil is sleeved on the protrusion;
[0017] The controller is electrically connected to the coil and is used to control the coil to generate a magnetic field to activate the heating coil.
[0018] Further, the heating coil is a magnetic coil;
[0019] The Dewar shell is a non-magnetic shell.
[0020] Further, the getter assembly further comprises: a fixing sheet;
[0021] The fixing sheet is detachably arranged on the fixing seat, and the getter body is clamped and fixed between the fixing sheet and the fixing seat.
[0022] Further, it also includes a cold finger cylinder and a window cover assembly;
[0023] The protrusion is arranged on the side of the Dewar shell;
[0024] A lead ring is provided on the top of the Dewar housing;
[0025] The window cover assembly is arranged on the lead ring;
[0026] The cold finger cylinder is arranged at the bottom of the Dewar shell.
[0027] It can be seen from the above technical solution that the present application provides a Dewar structure, including: a Dewar shell and a getter assembly; a protrusion is provided on the Dewar shell; an air chamber connected to the interior of the Dewar shell is provided inside the protrusion; the getter assembly is arranged in the air chamber.
[0028] In this solution, an air chamber for the getter assembly is provided in the Dewar shell, so that no installation space for the getter assembly is required inside the Dewar shell, thereby avoiding the problem of the getter assembly being installed in the cavity in the middle of the Dewar shell, resulting in a larger overall volume structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0030] Figure 1 A cross-sectional view of a dewar shell of a dewar structure provided in an embodiment of the present application;
[0031] Figure 2 A cross-sectional view of a getter assembly of a Dewar structure provided in an embodiment of the present application;
[0032] Figure 3 This is a schematic diagram of the overall structure of a Dewar structure provided in an embodiment of the present application. DETAILED DESCRIPTION
[0033] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the specification of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection requested by the present application.
[0034] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0035] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a replaceable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be indirectly connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.
[0036] See also Figure 1 A Dewar structure provided in an embodiment of the present application includes: a Dewar shell 10 and a getter assembly 20; a protrusion 11 is provided on the Dewar shell 10; an air chamber 12 connected to the interior of the Dewar shell 10 is provided inside the protrusion 11; the getter assembly 20 is arranged in the air chamber 12.
[0037] Specifically, the existing Dewar housing 10 reserves an air chamber for installing the getter inside, which makes the overall structure larger. In this embodiment, by providing a protrusion 11 on the Dewar housing 10, an air chamber 12 for installing the getter assembly 20 can be reserved without affecting the main size of the Dewar housing 10, which helps to miniaturize the Dewar structure.
[0038] For more specific examples, see Figure 1 and Figure 2The getter assembly 20 includes: a fixing seat 21, a getter body 22 and a heating coil 23; the fixing seat 21 is arranged in the air chamber 12; the getter body 22 is arranged on the fixing seat 21; and the heating coil 23 is sleeved on the getter body 22.
[0039] The heating coil 23 can be started and stopped by electronic control; when the heating coil 23 is started, it can heat the getter body 22 and activate the getter inside the getter body 22 .
[0040] As an embodiment, the getter assembly 20 may further include a fixing seat 21; after the getter body 22 is sleeved on the fixing seat 21, a detachable fixing sheet 24 may be installed to clamp and fix the getter body 22 between the fixing sheet 24 and the fixing seat 21. The fixing seat 21 may be a cylindrical or conical structure that facilitates the sleeve connection of the getter body 22.
[0041] In one embodiment, see Figures 1 to 3 The Dewar structure also includes: an activation component 30; the activation component 30 is sleeved on the protrusion 11 and is used to activate the heating coil 23.
[0042] Specifically, in the existing Dewar structure, in order to activate the getter, external power is generally applied to the interior of the Dewar shell for activation, which makes the Dewar structure more complicated and has the risk of leakage.
[0043] In this embodiment, the activation assembly 30 sleeved on the protrusion 11 can cooperate with the heating coil 23 to activate the heating coil 23 from the outside and thus activate the getter body 22, thereby reducing the complexity of the structure.
[0044] In a more specific embodiment, the activation component 30 includes an induction coil 31 and a controller 32 ; the coil 31 is sleeved on the protrusion 11 ; the controller 32 is electrically connected to the coil 31 and is used to control the coil 31 to generate a magnetic field to activate the heating coil 23 .
[0045] It should be noted that the controller 32 can be connected to the coil 31 via the bracket 33 .
[0046] That is, in this embodiment, the coil 31 generates an electromagnetic field and utilizes the electromagnetic induction principle to heat the heating ring 23 , thereby activating the heating ring 23 and the getter body 22 .
[0047] Furthermore, the heating coil 23 is a magnetic coil; the Dewar shell 10 is a non-magnetic shell to prevent the Dewar shell 10 from being heated.
[0048] In one embodiment, it also includes a cold finger cylinder 40 and a window cover assembly 50; the protrusion 11 is arranged on the side of the Dewar shell 10; a lead ring 13 is arranged on the top of the Dewar shell 10; the window cover assembly 50 is arranged on the lead ring 13; and the cold finger cylinder 40 is arranged at the bottom of the Dewar shell 10.
[0049] The above are only preferred embodiments of the present application and are not intended to limit the present utility model. Although the present application has been described in detail with reference to the examples, those skilled in the art can still modify the technical solutions recorded in the aforementioned examples or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A Dewar structure, characterized in that: include: Dewar housing (10) and getter assembly (20); The Dewar housing (10) is provided with a protrusion (11); An air chamber (12) communicating with the interior of the Dewar housing (10) is provided inside the protrusion (11); The getter assembly (20) is arranged in the air chamber (12).
2. The Dewar structure according to claim 1, characterized in that: The getter assembly (20) comprises: a fixing seat (21), a getter body (22) and a heating coil (23); The fixing seat (21) is arranged in the air chamber (12); The getter body (22) is arranged on the fixing seat (21); The heating coil (23) is sleeved on the getter body (22).
3. The Dewar structure according to claim 2, characterized in that: Also includes: Activate component (30); The activation component (30) is sleeved on the protrusion (11) and is used to activate the heating coil (23).
4. The Dewar structure according to claim 3, characterized in that: The activation component (30) includes an induction coil (31) and a controller (32); The coil (31) is sleeved on the protrusion (11); The controller (32) is electrically connected to the coil (31) and is used to control the coil (31) to generate a magnetic field to activate the heating coil (23).
5. The Dewar structure according to claim 4, characterized in that: The heating coil (23) is a magnetic coil; The Dewar housing (10) is a non-magnetic housing.
6. The Dewar structure according to claim 2, characterized in that: The getter assembly (20) further includes: a fixing sheet (24); The fixing sheet (24) is detachably arranged on the fixing seat (21), and the getter body (22) is clamped and fixed between the fixing sheet (24) and the fixing seat (21).
7. The Dewar structure according to claim 1, characterized in that: It also includes a cold finger cylinder (40) and a window cover assembly (50); The protrusion (11) is arranged on the side of the Dewar shell (10); A lead ring (13) is provided on the top of the Dewar housing (10); The window cover assembly (50) is arranged on the lead ring (13); The cold finger cylinder (40) is arranged at the bottom of the Dewar shell (10).