Temperature control furnace

Abstract

The utility model relates to a temperature control furnace which comprises a base, a shell, a first support and a second support, a crystal is fixed through a first fixing groove and a second fixing groove formed in the first support and the second support, and first limiting parts are arranged on the first support and the second support so that the crystal located in a fixing cavity can be blocked and limited; the crystal is prevented from separating from the fixed cavity. Compared with the prior art that the crystal is bonded and fixed through glue, the first limiting part is arranged on the fixing assembly to limit and fix the crystal, the possibility that the surface effect of the crystal is influenced by glue volatilization under the high-temperature condition is reduced, and the stability of the surface of the crystal is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of laser technology, and in particular to a temperature-controlled furnace. Background Art

[0002] Lasers have great application value and broad application prospects in many fields such as scientific research, medical treatment, industrial processing, and military defense. Energy stability is very important, which directly affects the accuracy of scientific research data, medical safety, and other properties such as the degree of processing precision. With the development of science and technology, the demand for lasers with specific wavelengths is increasing, and frequency-doubling nonlinear crystals are increasingly used in this field.

[0003] The high-temperature crystal temperature control furnace uses heating and insulation to quickly heat up the nonlinear crystal and accurately maintain the temperature to obtain high-efficiency and high-stability frequency-doubled laser output.

[0004] In the related art, the crystal is bonded to the accessories of the temperature-controlled furnace by means of colloid, and the colloid is prone to produce volatiles at high temperatures, thereby affecting the surface of the crystal. Utility Model Content

[0005] Based on this, it is necessary to provide a temperature-controlled furnace to address the problem that the crystal surface is easily affected in the existing temperature-controlled furnace.

[0006] A temperature-controlled furnace, comprising:

[0007] Base;

[0008] A housing connected to the base, wherein the housing is provided with a first mounting cavity along the axial direction;

[0009] A fixing assembly is arranged in the first mounting cavity, the fixing assembly comprises a first bracket and a second bracket, the first bracket and the second bracket are respectively configured with a first fixing groove and a second fixing groove, the first fixing groove and the second fixing groove are arranged opposite to each other to enclose a fixing cavity for fixing a crystal;

[0010] At least one of the first bracket and the second bracket is configured with at least one first limiting portion, and the first limiting portion is used to prevent the crystal from escaping from the fixing cavity along the axial direction.

[0011] In one embodiment, the first limiting portion includes two first limiting portions, one of which is located at one end of the first bracket along the axial direction, and the other first limiting portion is located at the other end of the second bracket along the axial direction.

[0012] In one embodiment, one of the first limiting portions is protruded from the groove wall of the first fixing groove to abut against one end of the crystal along the axial direction;

[0013] Another of the first limiting portions is protruded from the groove wall of the second fixing groove to abut against the other end of the crystal along the axial direction.

[0014] In one embodiment, the temperature-controlled furnace further includes an inner core disposed in the first installation cavity, the inner core is configured with a second installation cavity, and the first bracket and the second bracket are installed in the second installation cavity.

[0015] In one embodiment, one of the cavity wall of the second installation cavity and the second bracket is configured with a positioning block, and the other is configured with a positioning groove for engaging with the positioning block.

[0016] In one embodiment, a second limiting portion is protrudingly provided on the cavity wall of the second installation cavity, and the second limiting portion is used to abut against one end of the fixing component along the axial direction; and / or

[0017] The temperature-controlled furnace further comprises at least one rotary cover, which is connected to the cavity wall of the second installation cavity and is used to abut against one end of the fixing assembly along the axial direction.

[0018] In one embodiment, the temperature control furnace further comprises two window pieces disposed in the second installation cavity, and the two window pieces are located on both sides of the fixing assembly along the axial direction;

[0019] The temperature-controlled furnace further comprises at least one cover plate, which is connected to the cavity wall of the first installation cavity and is used to abut against one end of the inner core along the axial direction;

[0020] The temperature-controlled furnace further comprises at least one end cover, and the end cover abuts against one end of the cover plate along the axial direction.

[0021] In one embodiment, a sealing ring is connected to a side of the window sheet facing away from the cover plate; and / or

[0022] A buffer sheet is connected between the window sheet and the cover plate.

[0023] In one of the embodiments, a heat-insulating layer is further disposed in the first installation cavity, and the heat-insulating layer is sleeved on the outer wall of the inner core.

[0024] In one embodiment, the temperature-controlled furnace further includes a first fastener penetrating the first bracket and the second bracket; and / or

[0025] The temperature-controlled furnace further comprises a second fastener penetrating the inner core and the cover plate; and / or

[0026] The temperature-controlled furnace further comprises a third fastener penetrating the end cover and the insulation layer; and / or

[0027] The temperature-controlled furnace further includes a fourth fastener which is sequentially arranged through the base, the shell and the insulation layer; and / or

[0028] The outer wall of the inner core is provided with an annular groove, and the temperature-controlled furnace further comprises a heating element sleeved on the annular groove; and / or

[0029] The outer wall of the inner core is also provided with an installation groove, and the installation groove is used to install a temperature measuring element.

[0030] The temperature control furnace includes a base, a housing, a first bracket and a second bracket. The crystal is fixed by a first fixing groove and a second fixing groove provided on the first bracket and the second bracket, and a first limiting portion is provided on the first bracket and the second bracket to block and limit the crystal in the fixed cavity to prevent the crystal from leaving the fixed cavity. Compared with the method of fixing the crystal by colloid bonding in the prior art, the present application fixes the crystal by providing a first limiting portion on the fixing component to limit the crystal, thereby reducing the possibility of the colloid volatilization affecting the crystal surface effect under high temperature conditions and ensuring the stability of the crystal surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a temperature-controlled furnace provided in accordance with an embodiment of the present application.

[0032] Figure 2 for Figure 1 A cross-sectional view of a temperature controlled furnace is shown.

[0033] Figure 3 for Figure 1 An exploded schematic diagram of a temperature controlled furnace is shown.

[0034] Figure 4 for Figure 3 A schematic diagram of a first bracket and a second bracket in a temperature-controlled furnace is shown.

[0035] Figure 5 for Figure 3 Schematic diagram of the inner core in the temperature controlled furnace shown.

[0036] Figure numbers: 100, temperature control furnace; 110, base; 120, shell; 121, first installation cavity; 130, first bracket; 131, first fixing groove; 132, first limiting part; 140, second bracket; 141, second fixing groove; 142, positioning groove; 150, inner core; 151, second installation cavity; 152, positioning block; 153, second limiting part; 154, screw cover; 155, sealing ring; 156, window piece; 157, buffer piece; 158, annular groove; 159, installation groove; 160, cover plate; 170, end cover; 180, insulation layer; 191, first fastener; 192, second fastener; 193, third fastener; 194, fourth fastener; 195, heating element; 196, temperature measuring element; 1000, crystal. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0038] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does 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 a limitation on the present application.

[0039] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0043] See also Figures 1 to 3 As shown, a temperature-controlled furnace 100 provided in an embodiment of the present application includes a base 110, a shell 120 connected to the base 110, and a fixing assembly, wherein the shell 120 is provided with a first installation cavity 121 along the axial direction; the fixing assembly is arranged in the first installation cavity 121, and the fixing assembly includes a first bracket 130 and a second bracket 140, wherein the first bracket 130 and the second bracket 140 are respectively provided with a first fixing groove 131 and a second fixing groove 141, wherein the first fixing groove 131 and the second fixing groove 141 are arranged opposite to each other to enclose a fixing cavity for fixing a crystal 1000; at least one of the first bracket 130 and the second bracket 140 is provided with at least one first limiting portion 132, wherein the first limiting portion 132 is used to prevent the crystal 1000 from escaping from the fixing cavity along the axial direction. Figure 3As shown, the axial direction is the left-right direction, which is also the length direction of the crystal 1000. It can be understood that both sides of the fixed cavity have openings so that the laser can be irradiated on the crystal 1000 through the opening and emitted through the other opening.

[0044] The crystal 1000 is fixed by the first fixing groove 131 and the second fixing groove 141 provided on the first bracket 130 and the second bracket 140, and the first limiting portion 132 is provided on the first bracket 130 and the second bracket 140 to block and limit the crystal 1000 located in the fixing cavity to prevent the crystal 1000 from leaving the fixing cavity. Compared with the method of fixing the crystal 1000 by colloid bonding in the prior art, the present application fixes the crystal 1000 by providing the first limiting portion 132 on the fixing component to limit the crystal 1000, thereby reducing the possibility of the colloid volatilization affecting the surface effect of the crystal 1000 under high temperature conditions, and ensuring the stability of the surface of the crystal 1000. Among them, the first fixing groove 131 and the second fixing groove 141 are approximately cat-ear-shaped grooves, so that the contact area between the crystal 1000 and the groove wall is reduced, thereby reducing the movement resistance between the crystal 1000 and the fixing component. Of course, in other embodiments, the first fixing groove 131 and the second fixing groove 141 can also be rectangular grooves.

[0045] See also Figure 3 to Figure 4 As shown, in one embodiment, the first limiting portion 132 includes two, one of which is located at one end of the first bracket 130 along the axial direction, and the other is located at the other end of the second bracket 140 along the axial direction. In this way, the placement operation of the crystal 1000 is facilitated, so that after the crystal 1000 is placed in the first fixing groove 131, it can be moved to one end to abut against the first limiting portion 132 of the first bracket 130, and then placed in the second bracket 140, and the first limiting portion 132 of the second bracket 140 abuts against the other end of the crystal 1000, which is more convenient for the placement operation of the crystal 1000. In other embodiments, the first limiting portion 132 can also be opened at both ends of the axial direction of the first bracket 130 or the second bracket 140 to abut and limit the crystal 1000 located in the fixing cavity. Further, the first bracket 130 and the second bracket 140 can be locked by a first fastener 191 such as a screw.

[0046] See also Figure 3 to Figure 4 As shown, in one embodiment, one of the first limiting portions 132 is protruded from the groove wall of the first fixing groove 131 to abut against one end of the crystal 1000 along the axial direction; another first limiting portion 132 is protruded from the groove wall of the second fixing groove 141 to abut against the other end of the crystal 1000 along the axial direction. Figure 4As shown, the left end of the first fixing groove 131 is provided with a first limiting portion 132, and the first limiting portion 132 protrudes relative to the first fixing groove 131, so that a step surface is formed between the two, and the step surface abuts against and limits the crystal 1000. Similarly, the second limiting portion 153 protrudes relative to the second fixing groove 141, so that a step surface for abutting against the crystal 1000 is formed between the two.

[0047] See also Figure 3 and Figure 5 As shown, in one embodiment, the temperature control furnace 100 further includes an inner core 150 disposed in the first installation cavity 121, the inner core 150 is configured with a second installation cavity 151, and the first bracket 130 and the second bracket 140 are installed in the second installation cavity 151. By arranging the inner core 150 in the housing 120, the sealing effect of the fixed component is improved, and the fixed cavity of the fixed component is isolated from the outside world, the speed of temperature change is slowed down, and the temperature stability of the crystal 1000 is ensured, thereby ensuring the stability of the laser frequency doubling power.

[0048] See also Figure 3 and Figure 5 As shown, in one embodiment, one of the cavity wall of the second installation cavity 151 and the second bracket 140 is configured with a positioning block 152, and the other is configured with a positioning groove 142 for engaging with the positioning block 152. Specifically in this embodiment, the cavity wall of the second installation cavity 151 is configured with a positioning block 152, and the second bracket 140 is provided with a positioning groove 142. Through the cooperation of the positioning block 152 and the positioning groove 142, it is beneficial to the rapid assembly of the inner core 150 and the fixed component, and can improve the fixing effect of the fixed component, and reduce the possibility of the fixed component rotating circumferentially or moving radially relative to the inner core 150. In other embodiments, the cavity wall of the second installation cavity 151 may be provided with a positioning groove 142, and the second bracket 140 may be provided with a positioning block 152, etc.

[0049] See also Figure 3 and Figure 5 As shown, in one embodiment, the cavity wall of the second installation cavity 151 is provided with a second limiting portion 153, and the second limiting portion 153 is used to abut against one end of the fixing component along the axial direction. A step surface is formed between the second limiting portion 153 and the cavity wall of the second installation cavity 151, thereby blocking and limiting the fixing component along the axial direction, reducing the possibility of axial displacement.

[0050] See also Figure 2 and Figure 3As shown, in another embodiment, the temperature control furnace 100 further includes a rotary cover 154, which is connected to the cavity wall of the second installation cavity 151 and is used to abut against the other end of the fixed assembly along the axial direction. The second limiting portion 153 and the rotary cover 154 cooperate to abut against and limit the axial direction of the fixed assembly, wherein a finger groove is configured on the rotary cover 154 to facilitate the operator to assemble the rotary cover 154 through the finger groove. In other embodiments, the second limiting portion 153 may not be provided, and the rotary covers 154 are provided on both sides of the fixed assembly, and the abutment and limiting are performed by the rotary covers 154.

[0051] See also Figure 2 and Figure 3 As shown, in one embodiment, the temperature control furnace 100 further includes two window pieces 156 disposed in the second mounting cavity 151, and the two window pieces 156 are located on both sides of the fixing assembly along the axial direction. It can be understood that the window piece 156 faces the crystal 1000, and the laser enters from the window piece 156 on one side, passes through the crystal 1000, and then exits from the window piece 156 on the other side. By providing the window piece 156, both the light transmission performance can be ensured and the sealing performance of the crystal 1000 can be improved.

[0052] See also Figure 2 and Figure 3 As shown, further, the temperature control furnace 100 also includes at least one cover plate 160, which is connected to the cavity wall of the first installation cavity 121 and is used to abut against one end of the inner core 150 along the axial direction, and the inner core 150 is axially limited by the cover plate 160 to ensure the assembly reliability of each component. Further, the inner core 150 and the cover plate 160 are locked by a second fastener 192 such as a screw. For example, in this embodiment, the cover plates 160 are connected to both sides of the inner core 150. In other embodiments, a step surface can be set on one side of the shell 120 to axially limit the inner core 150, and the other side of the inner core 150 is connected to the cover plate 160 to limit it.

[0053] See also Figure 2 and Figure 3As shown, the temperature control furnace 100 also includes at least one end cover 170, and the end cover 170 can be a stepped cylinder, so that the shell 120 abuts against the stepped surface of the end cover 170, and at the same time, the axial side of the end cover 170 abuts against the cover plate 160. Further, the cover plate 160 and the end cover 170 are locked by a third fastener 193 such as a screw. For example, in this embodiment, both sides of the shell 120 are connected to the cover plate 160. In other embodiments, a stepped surface can also be provided on one side of the shell 120 to axially limit the cover plate 160, and the other side of the cover plate 160 is connected to the end cover 170 to limit it. It can be understood that both the end cover 170 and the cover plate 160 are provided with a light hole, and the light hole is directly opposite to the crystal 1000, so that the laser can pass through the light hole through the crystal 1000.

[0054] See also Figure 2 and Figure 3 As shown, in one embodiment, a sealing ring 155 is connected to the side of the window sheet 156 away from the cover plate 160. The sealing ring 155 improves the sealing effect of the crystal 1000 in the inner core 150, reduces the possibility of external dust entering the temperature control furnace 100 and affecting the frequency doubling nonlinear crystal 1000, and enhances the stability of the frequency doubling nonlinear crystal 1000. The sealing ring 155 can be made of indium, indium alloy, copper or expanded polytetrafluoroethylene. Furthermore, a buffer sheet 157 is connected between the window sheet 156 and the cover plate 160. By providing the buffer sheet 157, the possibility of the cover plate 160 fracturing the window sheet 156 is reduced, and the service life of the window sheet 156 and other components is improved.

[0055] See also Figure 2 and Figure 3 As shown, in one embodiment, a heat-insulating layer 180 is further provided in the first installation cavity 121 of the outer shell 120, and the heat-insulating layer 180 is sleeved on the outer wall of the inner core 150. By providing the heat-insulating layer 180, the inner core 150 is isolated from the external environment, and the speed of the temperature change of the inner core 150 is slowed down, thereby ensuring the temperature stability of the crystal 1000 and the stability of the laser frequency-doubling power. Among them, the heat-insulating layer 180, the outer shell 120 and the inner core 150 are all cylindrical structures, and the end cover 170, the cover plate 160, the heat-insulating layer 180, and the base 110 can be made of asbestos board, which has good insulation and heat-insulating effects.

[0056] Furthermore, threaded holes are provided at corresponding positions of the base 110 , the shell 120 , and the thermal insulation layer 180 , so that the shell 120 and the thermal insulation layer 180 can be locked to the base 110 by fasteners such as screws.

[0057] See also Figure 2 and Figure 3As shown, in one embodiment, an annular groove 158 is formed on the outer wall of the inner core 150, and the temperature control furnace 100 further includes a heating element 195 sleeved on the annular groove 158. By attaching the heating element 195 to the outer wall of the inner core 150, the heat conduction time is shortened, and rapid heating is achieved. Temperature compensation through the heating element 195 can achieve non-critical phase matching, eliminate the walk-off effect of light in the crystal 1000, and improve the conversion rate. At the same time, appropriate heating can pre-adjust the temperature of the crystal 1000, reduce the performance degradation or damage caused by the heat generated during the working process, and some nonlinear crystals 1000 can achieve a higher conversion rate at a specific temperature.

[0058] See also Figure 2 and Figure 3 As shown, further, the outer wall of the inner core 150 is also provided with an installation groove 159, and the installation groove 159 is used to install the temperature measuring element 196. Among them, the temperature control of the temperature control furnace 100 adopts the PID algorithm, and the temperature measuring element 196 continuously samples the current actual temperature, calculates the deviation between the actual temperature and the set temperature, calculates the corresponding control output value according to the PID algorithm, and adjusts the heating power of the heating element 195, so as to achieve fast and accurate temperature control. The temperature measuring element 196 can be a platinum resistor or a temperature sensor, etc.

[0059] When assembling the temperature control furnace 100, the crystal 1000 is first placed in the first fixing groove 131 of the first bracket 130, and the side of the crystal 1000 is abutted against the first limiting portion 132 on the first fixing groove 131; then the second fixing groove 141 of the second bracket 140 is aligned with the crystal 1000 and slid along the crystal 1000 until the first limiting portion 132 on the second fixing groove 141 abuts against the other side of the crystal 1000, and the first bracket 130 and the second bracket 140 are locked by the first fastener 191. Further, the positioning groove 142 of the second bracket 140 is aligned with the positioning block 152 of the inner core 150, and the fixing assembly (i.e., the first bracket 130 and the second bracket 140) is axially inserted into the inner core 150 until the fixing assembly abuts against the second limiting portion 153 of the inner core 150, and then the screw cap 154 ​​is screwed and tightened. Next, the sealing ring 155, the window sheet 156 and the buffer sheet 157 are placed in sequence on both axial sides of the inner core 150, and then the inner core 150 is pressed by the cover plate 160, and the cover plate 160 and the inner core 150 are locked by the second fastener 192 to achieve sealing. Next, place the temperature measuring element 196, such as a platinum resistor, into the installation groove 159 provided on the outer wall of the inner core 150, and then sleeve the heating element 195 in the annular groove 158 on the outside of the inner core 150; then sleeve the insulation layer 180 and the outer shell 120 in sequence on the outside of the inner core 150, wherein the insulation layer 180 and the outer shell 120 are both provided with wiring holes in the center; crimp the end cover 170 onto the insulation layer 180 and the outer shell 120, and lock them with the third fastener 193; finally, pass the fourth fastener 194 through the threaded holes of the base 110, the outer shell 120 and the insulation layer 180 to fix the components to the base 110. It can be understood that a wiring groove is also provided on the base 110.

[0060] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0061] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A temperature controlled furnace, characterized in that: The temperature controlled furnace comprises: Base (110); A housing (120) connected to the base (110), the housing (120) being provided with a first installation cavity (121) along the axial direction; a fixing assembly, arranged in the first mounting cavity (121), the fixing assembly comprising a first bracket (130) and a second bracket (140), the first bracket (130) and the second bracket (140) being respectively provided with a first fixing groove (131) and a second fixing groove (141), the first fixing groove (131) and the second fixing groove (141) being arranged facing each other to enclose a fixing cavity for fixing a crystal (1000); At least one of the first bracket (130) and the second bracket (140) is configured with at least one first limiting portion (132), wherein the first limiting portion (132) is used to prevent the crystal (1000) from escaping from the fixing cavity along the axial direction.

2. The temperature controlled furnace according to claim 1, characterized in that: The first limiting portions (132) include two first limiting portions (132), one of which is located at one end of the first bracket (130) along the axial direction, and the other first limiting portion (132) is located at the other end of the second bracket (140) along the axial direction.

3. The temperature controlled furnace according to claim 2, characterized in that: One of the first limiting portions (132) is protruded from the groove wall of the first fixing groove (131) so as to abut against one end of the crystal (1000) along the axial direction; Another of the first limiting portions (132) is protruded from the groove wall of the second fixing groove (141) to abut against the other end of the crystal (1000) along the axial direction.

4. The temperature controlled furnace according to claim 1, characterized in that: The temperature-controlled furnace further comprises an inner core (150) arranged in the first installation cavity (121), the inner core (150) being configured with a second installation cavity (151), and the first bracket (130) and the second bracket (140) being installed in the second installation cavity (151).

5. The temperature controlled furnace according to claim 4, characterized in that: One of the cavity wall of the second installation cavity (151) and the second bracket (140) is configured with a positioning block (152), and the other is configured with a positioning groove (142) for clamping with the positioning block (152).

6. The temperature controlled furnace according to claim 4, characterized in that: A second limiting portion (153) is protrudingly provided on the cavity wall of the second installation cavity (151), and the second limiting portion (153) is used to abut against one end of the fixing assembly along the axial direction; and / or The temperature-controlled furnace further comprises at least one rotary cover (154), the rotary cover (154) being connected to the cavity wall of the second installation cavity (151) and being used for abutting against one end of the fixing assembly along the axial direction.

7. The temperature controlled furnace according to claim 4, characterized in that: The temperature-controlled furnace further comprises two window pieces (156) arranged in the second installation cavity (151), the two window pieces (156) being located on both sides of the fixing component along the axial direction; The temperature-controlled furnace further comprises at least one cover plate (160), the cover plate (160) being connected to the cavity wall of the first installation cavity (121) and being used to abut against one end of the inner core (150) along the axial direction; The temperature-controlled furnace further comprises at least one end cover (170), wherein the end cover (170) abuts against one end of the cover plate (160) along the axial direction.

8. The temperature controlled furnace according to claim 7, characterized in that: A sealing ring (155) is connected to a side of the window sheet (156) facing away from the cover plate (160); and / or A buffer sheet (157) is connected between the window sheet (156) and the cover plate (160).

9. The temperature-controlled furnace according to claim 7, characterized in that: A heat-insulating layer (180) is also provided in the first installation cavity (121), and the heat-insulating layer (180) is sleeved on the outer wall of the inner core (150).

10. The temperature controlled furnace according to claim 9, characterized in that: The temperature-controlled furnace further comprises a first fastener (191) penetrating the first bracket (130) and the second bracket (140); and / or The temperature-controlled furnace further comprises a second fastener (192) penetrating the inner core (150) and the cover plate (160); and / or The temperature-controlled furnace further comprises a third fastener (193) penetrating the end cover (170) and the thermal insulation layer (180); and / or The temperature-controlled furnace further comprises a fourth fastener (194) which is sequentially disposed through the base (110), the outer shell (120), and the thermal insulation layer (180); and / or The outer wall of the inner core (150) is provided with an annular groove (158), and the temperature-controlled furnace further comprises a heating element (195) sleeved on the annular groove (158); and / or The outer wall of the inner core (150) is further provided with a mounting groove (159), and the mounting groove (159) is used for mounting a temperature measuring element (196).

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