Liftable crucible bottom heat preservation device
By designing a liftable insulation layer at the bottom of the crucible, the problem of increasing heat dissipation during the crucible lifting process is solved, and a more efficient heating effect and energy consumption are achieved.
Patent Information
- Application Number
- CN202420553964.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-03-21
AI Technical Summary
During the crucible lifting and lowering process of the existing crucible heater, the heating effect of the bottom heater is weakened, resulting in an increase in heat dissipation and thus increasing energy consumption.
A liftable and lowered crucible bottom insulation device is designed, including a fixed insulation layer on both sides of the crucible and a liftable insulation layer. The liftable and lowered insulation layer is used to form insulation at the bottom of the crucible to reduce heat dissipation.
It effectively reduces the heat dissipation, allowing the bottom heater to better heat the bottom of the crucible and reduces production energy consumption.
Smart Images
Figure CN222574859U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of crucibles, in particular to a lifting and lowering crucible bottom insulation device. Background Art
[0002] At present, monocrystalline silicon and polycrystalline silicon are important raw materials for industries such as semiconductors and photovoltaics. The industry mostly uses crystal growth furnaces to prepare monocrystalline silicon and polycrystalline silicon. In this process, the raw materials need to be placed in a crucible to heat and melt, and then crystallize to obtain the desired product. The entire preparation process is very important to maintain temperature, so a heat preservation device is installed around the crucible to prevent the heat in the furnace from dissipating and maintain a high temperature environment.
[0003] In the existing industry, the main way to keep the crucible warm is to install insulation felt around the sides to maintain the temperature in the furnace. However, during the production process, the position of the crucible needs to be raised according to the actual production process. Therefore, when the crucible rises, the distance between its bottom and the bottom heater becomes larger, and the heating effect of the bottom heater on the crucible is weakened. At the same time, the empty space at the bottom of the crucible will become larger, which will increase the heat dissipation. In order to maintain the temperature, the power of the heater needs to be increased, which increases energy consumption. Utility Model Content
[0004] In view of the shortcomings of the prior art, the utility model provides a liftable crucible bottom insulation device, which adds a liftable insulation layer to the existing equipment. The liftable insulation layer is used to form insulation at the bottom of the crucible to reduce heat dissipation, so that the bottom heater can effectively heat the bottom of the crucible during the crucible lifting process, thereby reducing production energy consumption.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liftable crucible bottom insulation device, including fixed insulation layers on both sides of the crucible, and an additional liftable insulation layer, which is arranged between the crucible and the bottom heater; the liftable insulation layer is circular as a whole, and includes a plurality of Z-shaped circular ring parts that can be hooked and lifted to each other, wherein the uppermost Z-shaped circular ring part is fixed to the bottom of the crucible, and the lowermost Z-shaped circular ring part is fixed to the bottom of the crystalline silicon furnace body.
[0006] As a preferred embodiment, the number of Z-shaped circular rings that can be hooked and lifted is 3-12. The number of Z-shaped circular rings can be determined according to the matching between the lifting stroke of the crucible and the height of the Z-shaped circular rings, and is not limited to 12.
[0007] As a preferred embodiment, the liftable thermal insulation layer is made of thermal insulation felt.
[0008] As a preference, the uppermost Z-shaped circular ring member and the crucible 1 as well as the lowermost Z-shaped circular ring member and the bottom of the silicon crystal furnace body are fixed by bolts.
[0009] When the crucible of the utility model does not rise, the liftable heat-insulating layer automatically falls to the lowest point by gravity to form a multi-layered circular ring, which does not affect the normal functions of other parts and restrains the heat dissipation of the bottom heater, so as to better heat the middle bottom position of the crucible. When the crucible rises, the Z-shaped circular rings of the liftable heat-insulating layer hang on each other layer by layer during the rising movement to form a sealed heat-insulating space, thereby reducing the heat dissipation, reducing the required heater power, and reducing energy consumption.
[0010] The beneficial effects of the utility model are as follows: a liftable insulation layer is added to the existing equipment, and insulation is formed at the bottom of the crucible through the liftable insulation layer, which reduces the heat dissipation, so that the bottom heater can effectively heat the bottom of the crucible during the lifting process of the crucible, thereby reducing production energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 The structure of the embodiment of the utility model is shown in FIG. Figure 1 ;
[0012] Figure 2 The structure of the embodiment of the utility model is shown in FIG. Figure 2 .
[0013] In the figure: 1. Crucible; 2. Liftable insulation layer; 3. Bottom heater; 4. Crucible rod; 5. Fixed insulation layer. DETAILED DESCRIPTION
[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0015] Example 1: Figure 1 As shown, a liftable crucible bottom insulation device includes fixed insulation layers 5 on both sides of the crucible 1, and an additional liftable insulation layer 2 is provided between the crucible 1 and the bottom heater 3, and the liftable insulation layer 2 is made of insulation felt. A crucible rod 4 is provided in the middle of the crucible 1, and the crucible 1 can be lifted and lowered. A circular ring CC bottom plate is provided at the connection between the bottom of the crucible 1 and the crucible rod 4. The liftable insulation layer 2 is circular as a whole, and includes 5 Z-shaped circular ring parts that can be hooked and lifted to each other, wherein the uppermost Z-shaped circular ring part is fixed to the circular ring CC bottom plate at the bottom of the crucible 1 by bolts, and the lowermost Z-shaped circular ring part is fixed to the graphite bottom plate at the bottom of the crystalline silicon furnace body by bolts.
[0016] like Figure 2As shown, in actual use, when the crucible 1 rises, the bottom of the crucible 1 drives the Z-shaped circular ring of the uppermost layer of the liftable thermal insulation layer 2 to rise. Since the liftable thermal insulation layer 2 is composed of five Z-shaped circular rings, the Z-shaped circular rings are hung one layer at a time during the rising movement to form a sealed thermal insulation space, thereby reducing the heat dissipation. At the same time, the bottom heater 3 can heat the bottom of the crucible 1 more concentratedly and effectively, thereby ensuring that the temperature of the raw material liquid surface at the bottom and the middle position of the crucible 1 can be maintained at the required temperature, avoiding the need to significantly increase the heater power to achieve this effect, thereby greatly reducing energy consumption.
[0017] Embodiment 2: Another liftable crucible bottom insulation device comprises a fixed insulation layer 5 on both sides of the crucible 1, and an additional liftable insulation layer 2 is provided. The liftable insulation layer 2 is circular as a whole and comprises three Z-shaped circular rings that can be hooked and lifted together. The rest is the same as Embodiment 1.
[0018] Embodiment 3: Another liftable crucible bottom insulation device comprises a fixed insulation layer 5 on both sides of the crucible 1, and an additional liftable insulation layer 2 is provided. The liftable insulation layer 2 is circular as a whole and comprises 12 Z-shaped circular ring parts that can be hooked and lifted together. The rest is the same as Embodiment 1.
Claims
1. A lifting and lowering crucible bottom insulation device, comprising fixed insulation layers (5) on both sides of a crucible (1), characterized in that: A liftable heat-insulating layer (2) is added and arranged between the crucible (1) and the bottom heater (3); the liftable heat-insulating layer (2) is circular in shape as a whole and comprises a plurality of Z-shaped circular rings that can be hooked and lifted together, wherein the uppermost Z-shaped circular ring is fixed to the bottom of the crucible (1), and the lowermost Z-shaped circular ring is fixed to the bottom of the silicon crystal furnace body.
2. The liftable crucible bottom heat preservation device according to claim 1, characterized in that: The number of the Z-shaped circular ring parts that can be hooked and lifted mutually is 3-12.
3. The liftable crucible bottom heat preservation device according to claim 1, characterized in that: The liftable thermal insulation layer (2) is made of thermal insulation felt.
4. The liftable crucible bottom heat preservation device according to claim 1, characterized in that: The uppermost Z-shaped circular ring member and the crucible (1) as well as the lowermost Z-shaped circular ring member and the bottom of the silicon crystal furnace body are both fixed by bolts.