High efficiency shaped charge

Abstract

The application discloses a high-efficiency energy-gathering cover, which comprises an outer shell, and a shell cavity is formed in the inner part of the outer shell, and the high-efficiency energy-gathering cover comprises a reflection interval plate, the reflection interval plate is arranged in the shell cavity and faces the upper surface of the shell cavity, and a first energy-gathering heat-accumulating cavity, one side of the first energy-gathering heat-accumulating cavity is the upper surface of the shell cavity, and the other side is the upper surface of the reflection interval plate, and the reflection interval plate is used for conducting heat and reflecting heat towards the first energy-gathering heat-accumulating cavity.

Description

[0001] This application is a divisional application of Chinese invention patent filed on October 20, 2020, with application number 202011125258.6 and entitled "High-efficiency energy-concentrating cover". Technical Field

[0002] This invention relates to a high-efficiency energy-concentrating cover. Background Technology

[0003] Gas stoves are now generally developing towards higher load capacity and higher energy efficiency. To improve energy efficiency, the structure of pot supports has evolved from the original simple foot piece form to those with energy-concentrating discs or single-layer and double-layer energy-concentrating covers. However, while using double-layer energy-concentrating covers improves energy efficiency, further improvements to the gas stove's efficiency have encountered a bottleneck. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defect that the energy efficiency of the existing double-layer energy-concentrating shield is limited and cannot be further improved, and to provide a high-efficiency energy-concentrating shield.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A high-efficiency energy-concentrating shield includes an outer shell, the interior of which forms a cavity, characterized in that the high-efficiency energy-concentrating shield comprises:

[0007] A reflective spacer is disposed within the shell cavity and faces the upper surface of the shell cavity;

[0008] The first energy-concentrating heat storage cavity has one side being the upper surface of the shell cavity and the other side being the upper surface of the reflective spacer. The reflective spacer is used to conduct heat and reflect the heat toward the first energy-concentrating heat storage cavity.

[0009] The outer casing includes an upper plate and a base. The shell cavity is formed between the upper plate and the base. The upper surface of the shell cavity is the inner surface of the upper plate, and the lower surface of the shell cavity is the inner surface of the base. The reflective spacer contacts the base only through a small plane. The reflective spacer has no other contact with the base.

[0010] The reflective spacer can be a light-colored metal sheet with high heat transfer coefficient and high reflectivity, or a reflective coating with high heat transfer coefficient and high reflectivity.

[0011] This invention enhances the heat within the first energy-concentrating and heat-storing cavity by using a reflective partition plate. This allows the heat energy from the combustion zone of the burner to be firmly concentrated and stored at the burner head, reducing heat loss between the burner head and the external low-temperature zone, thereby improving energy efficiency. Furthermore, the reflective partition plate only contacts the base of the outer casing via a small flat surface; there is no other point of contact between the reflective partition plate and the base. This reduces heat conduction between the reflective partition plate and the base, enhancing its heat storage and energy-storing capabilities.

[0012] Preferably, the high-efficiency energy-concentrating cover further includes a second energy-concentrating and heat-storing cavity, one side of which is the lower surface of the shell cavity, and the other side is the lower surface of the reflective spacer.

[0013] Preferably, the upper surface of the reflective spacer is arranged parallel to the upper surface of the shell cavity, and there is a gap between the upper surface of the reflective spacer and the upper surface of the shell cavity.

[0014] Preferably, the distance between the upper surface of the reflective spacer and the upper surface of the shell cavity is 2.5mm-4mm.

[0015] Preferably, the upper surface of the reflective spacer has a concave curved shape, the upper surface of the shell cavity has a concave curved shape, and the first energy-concentrating and heat-storing cavity is a V-shaped cavity formed between the upper surface of the shell cavity and the upper surface of the reflective spacer.

[0016] Preferably, a protruding connecting post is formed on the lower surface of the shell cavity, a connecting piece is formed on the reflective spacer, the connecting piece is fixed on the connecting post, and the reflective spacer is separated from the lower surface of the shell cavity.

[0017] Preferably, the lower surface of the reflective spacer is arranged parallel to the lower surface of the shell cavity, and there is a gap between the upper surface of the reflective spacer and the upper surface of the shell cavity.

[0018] Preferably, the connection between the upper plate and the base is sealed by a sealing element.

[0019] Preferably, the outer surface of the upper plate is a dark, smooth curved surface, the inner surface of the upper plate is a dark, rough curved surface, the upper surface of the reflective spacer is a light-colored, smooth curved surface, and the outer surface of the base is a dark, rough surface.

[0020] Preferably, the heat absorption capacity of the outer surface of the upper plate, the inner surface of the upper plate, and the outer surface of the base is greater than the heat absorption capacity of the upper surface of the reflective spacer.

[0021] Preferably, the outer surface of the upper plate, the inner surface of the upper plate, and the outer surface of the base are made of black ceramic film or black enamel; and / or the reflective spacer is a thin metal plate with a glossy mirror finish.

[0022] Preferably, the heat reflectivity of the outer surface of the upper plate and the upper surface of the reflective spacer is greater than that of the inner surface of the upper plate and the outer surface of the base.

[0023] Preferably, the reflective spacer is a reflective coating formed on the inner surface of the base.

[0024] Preferably, a protruding connecting post is formed on the lower surface of the shell cavity, a connecting boss is formed on the reflective spacer, the connecting boss is fixed on the connecting post, and the reflective spacer is separated from the lower surface of the shell cavity.

[0025] Preferably, a connecting boss is formed on the outer ring side of the shell cavity, and a connecting groove is formed on the outer ring side of the reflective spacer. The connecting groove is fixed on the connecting boss, and the reflective spacer is separated from the lower surface of the shell cavity.

[0026] The positive and progressive effects of this invention are as follows: This invention allows the heat energy of the combustion zone of the stove to be firmly concentrated and stored in the burner head, reducing heat loss between the burner head and the external low-temperature zone, thereby improving energy efficiency. Attached Figure Description

[0027] Figure 1 This is an exploded view of the structure of the high-efficiency energy-concentrating shield of Embodiment 1 of the present invention.

[0028] Figure 2 This is a cross-sectional structural diagram of the high-efficiency energy-concentrating shield of Embodiment 1 of the present invention.

[0029] Figure 3 This is an exploded view of the high-efficiency energy-concentrating shield of Embodiment 2 of the present invention.

[0030] Figure 4 This is a cross-sectional structural diagram of the high-efficiency energy-concentrating shield of Embodiment 2 of the present invention.

[0031] Figure 5 This is an exploded view of the high-efficiency energy-concentrating shield of Embodiment 3 of the present invention.

[0032] Figure 6 This is a cross-sectional structural diagram of the high-efficiency energy-concentrating shield of Embodiment 4 of the present invention. Detailed Implementation

[0033] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, this embodiment discloses a high-efficiency energy-concentrating shield, including an outer shell 1, which is composed of an upper plate 11 and a base 12. The connection between the upper plate 11 and the base 12 is sealed by a sealing member 3. A shell cavity is formed inside the outer shell 1. The high-efficiency energy-concentrating shield includes a reflective spacer 2, which is disposed inside the shell cavity and faces the upper surface 103 of the shell cavity. The reflective spacer 2 is a light-colored thin metal plate with high heat transfer coefficient and high reflectivity.

[0036] like Figure 2 As shown, the high-efficiency energy-concentrating cover includes a first energy-concentrating heat-storing cavity 101. One side of the first energy-concentrating heat-storing cavity 101 is the upper surface 103 of the shell cavity, and the other side is the upper surface 201 of the reflective spacer 2. The reflective spacer 2 is used to conduct heat and reflect the heat towards the first energy-concentrating heat-storing cavity 101. Figure 2 As shown, the high-efficiency energy-concentrating cover also includes a second energy-concentrating heat-storing cavity 102. One side of the second energy-concentrating heat-storing cavity 102 is the lower surface 104 of the shell cavity, and the other side is the lower surface 202 of the reflective spacer 2. In this embodiment, the upper surface 103 of the shell cavity is the inner surface of the upper plate 11, and the lower surface 104 of the shell cavity is the inner surface of the base 12.

[0037] like Figure 2 As shown, in this embodiment, the upper surface 201 of the reflective spacer 2 is arranged parallel to the upper surface 103 of the shell cavity, and there is a gap between the upper surface 201 of the reflective spacer 2 and the upper surface 103 of the shell cavity. The gap between the upper surface 201 of the reflective spacer 2 and the upper surface 103 of the shell cavity is 2.5mm-4mm. The structural shape of the reflective spacer 2 is parallel to the structure of the upper plate 11, and the energy focusing effect is optimal when the gap between them is 2.5mm-4mm.

[0038] like Figure 2 As shown, the upper surface 201 of the reflective spacer 2 has a concave curved shape, the upper surface 103 of the shell cavity has a concave curved shape, and the first energy-concentrating and heat-storing cavity 101 is a V-shaped cavity formed between the upper surface 103 of the shell cavity and the upper surface of the reflective spacer 2.

[0039] like Figure 1As shown, four protruding connecting posts 13 are formed on the lower surface of the shell cavity, and four connecting pieces 21 are formed on the reflective spacer 2. The connecting pieces are fixed to the connecting posts 13, and the reflective spacer 2 is separated from the lower surface 104 of the shell cavity. Thus, the reflective spacer 2 and the base 12 are only in contact with each other by four small planes and are fixed with screws. There is no other place where the reflective spacer 2 contacts the base 12. This reduces the heat conduction between the reflective spacer 2 and the base 12, and enhances the heat storage function of the reflective spacer 2.

[0040] In this embodiment, the high-efficiency energy-concentrating cover is equipped with a reflective partition plate 2. The reflective partition plate 2 can be set as a thin, silver-white plate with high thermal conductivity, fast heat transfer, and high reflectivity. The reflective partition plate 2 divides the interior of the high-efficiency energy-concentrating cover into two energy-concentrating heat storage cavities (first energy-concentrating heat storage cavity 101 and second energy-concentrating heat storage cavity 102). The two energy-concentrating heat storage cavities provide dual energy-concentrating heat storage, firmly locking in the heat of the burner head, reducing heat loss, and improving energy efficiency.

[0041] In this embodiment, a highly reflective reflective spacer 2 is designed and installed near the base 12 to increase the temperature gradient of the heat loss path from the burner head to the outside, thereby reducing the rate of heat loss from the high-temperature zone of the burner to the low-temperature zone outside, thus improving energy efficiency.

[0042] The sealing element 3 is a sealing elastomer. Through the sealing element 3, the internal air is prevented from flowing out after being heated during combustion, thus maintaining a constant air volume within the "energy-concentrating heat-storing cavity." When the stove is operating, if the cooking utensils cannot absorb the heat generated by combustion, the air within the "energy-concentrating heat-storing cavity" acts as a heat storage medium, effectively locking the outward-dissipating energy within the stove head, reducing heat loss from the stove head to the outside air, thereby improving energy efficiency.

[0043] Unlike the method of improving energy efficiency by creating a vacuum in the energy-concentrating cover, which is theoretically not feasible here, this solution aims to form an "energy-concentrating and heat-storing cavity" between the upper plate 11 and the base 12. This ensures that the amount of air in this cavity is constant. When the stove is working, because the air in this space does not overflow, the temperature of the internal air will continue to rise, which is equivalent to a carrier for storing energy. However, if the inside is a vacuum, this cavity has no medium and cannot store heat. The vacuum energy-concentrating cover can only play a role in heat insulation. When the cooking appliance cannot absorb the heat generated during combustion in time, the heat will inevitably be lost from the air inlets around the pot support. It has no heat storage function, so it is not as effective as the solution in this embodiment in improving energy efficiency.

[0044] Example 2

[0045] like Figure 3 and Figure 4As shown, this embodiment discloses a high-efficiency energy-concentrating shield, including an outer shell 1, which is composed of an upper plate 11 and a base 12. The connection between the upper plate 11 and the base 12 is sealed by a sealing member 3. A shell cavity is formed inside the outer shell 1. The high-efficiency energy-concentrating shield includes a reflective spacer 2, which is disposed inside the shell cavity and faces the upper surface 103 of the shell cavity. The reflective spacer 2 is a light-colored thin metal plate with high heat transfer coefficient and high reflectivity.

[0046] like Figure 4 As shown, the high-efficiency energy-concentrating cover includes a first energy-concentrating heat storage cavity 101. One side of the first energy-concentrating heat storage cavity 101 is the upper surface of the shell cavity (i.e., the inner surface 112 of the upper plate 11), and the other side is the upper surface of the reflective spacer 2. The reflective spacer 2 is used to conduct heat and reflect the heat toward the first energy-concentrating heat storage cavity 101.

[0047] like Figure 4 As shown, in this embodiment, the lower surface of the reflective spacer 2 is arranged parallel to the lower surface of the shell cavity (i.e., the inner surface of the base 12), and there is a gap between the upper surface 20 of the reflective spacer 2 and the upper surface of the shell cavity (i.e., the inner surface 112 of the upper plate 11).

[0048] like Figure 3 As shown, a protruding connecting post 13 is formed on the inner surface of the base 12, and a connecting boss 21 is formed on the reflective spacer 2. The connecting boss 21 is fixed to the connecting post 13. The protruding connecting post 13 has low processing cost because it is relatively easy to process threaded holes in the vertical connecting post 13, resulting in lower cost.

[0049] like Figure 4 As shown, the outer surface 111 of the upper plate 11 is a dark smooth curved surface, the inner surface 112 of the upper plate 11 is a dark rough curved surface, the upper surface 20 of the reflective spacer 2 is a light smooth curved surface, and the outer surface 121 of the base 12 is a dark rough surface.

[0050] Therefore, the heat absorption capacity of the outer surface 111 of the upper plate 11, the inner surface 112 of the upper plate 11, and the outer surface 121 of the base 12 is greater than the heat absorption capacity of the upper surface 20 of the reflective partition 2. The heat reflection capacity of the outer surface 111 of the upper plate 11 and the upper surface of the reflective partition 2 is greater than the heat reflection capacity of the inner surface 112 of the upper plate 11 and the outer surface 121 of the base 12.

[0051] The inner surface 112 of the upper plate 11 and the outer surface 121 of the base 12 are roughened to reduce their reflectivity. The outer surface 111 of the upper plate 11, the inner surface 112 of the upper plate 11, and the outer surface 121 of the base 12 are coated with a black (or dark-colored) coating (such as black ceramic film or black enamel). The dark color absorbs heat and reduces heat loss. The upper surface 20 of the reflective partition 2 is a concave surface of the partition (a thin metal plate with a high thermal conductivity system number and a bright mirror surface). Its material properties are highly reflective, which increases the rate at which the heat from the energy-concentrating and heat-storing cavity is transferred to the bottom of the pot, thereby improving energy efficiency.

[0052] The outer surface 111 of the upper plate 11 is a black, highly smooth surface. The function of the outer surface 111 of the upper plate 11 is to concentrate and reflect heat. Black is more likely to absorb heat. Since the outer surface 111 of the upper plate 11 is closest to the burner head, the heat from the burner head will first come into contact with the outer surface 111 of the upper plate 11 when it is transferred and radiated. If the outer surface 111 of the upper plate 11 is a light-colored, highly reflective surface, when the heat absorption efficiency of the cooking appliance is low, too much heat will be reflected back and will inevitably be lost to the surrounding air through other paths. The outer surface 111 of the upper plate 11 can absorb some heat to reduce heat loss to the surrounding air.

[0053] The outer surface 121 of the base 12 is a rough black surface to reduce its reflectivity and increase its heat absorption capacity. The upper surface 20 of the reflective partition 2 is a bright silver-white curved surface, mainly to enhance its heat reflection capacity and reduce heat absorption. The upper surface 20 of the reflective partition 2 continuously reflects energy upwards to the inner surface 112 of the upper plate 11. This increases the temperature gradient along the heat loss path from the burner head to the energy-concentrating shroud to the air, resulting in a larger temperature gradient from the outer surface 111 of the upper plate 11 to the outer surface 121 of the base 12. Assuming a constant energy level, a larger temperature gradient from the outer surface 111 of the upper plate 11 to the outer surface 121 of the base 12 leads to a higher temperature at the outer surface 111 of the upper plate 11, which in turn leads to a higher air temperature near the cookware at the burner head. This forms a high-temperature barrier, reducing the rate of heat convection and radiation from the burner head to the lower-temperature external zone.

[0054] Example 3

[0055] like Figure 5 As shown, the difference between this embodiment and embodiment 2 is that a connecting boss 13 is formed on the outer ring side of the shell cavity (the outer ring side of the base 12), and a connecting groove 21 is formed on the outer ring side of the reflective spacer 2. The connecting groove 21 is fixed on the connecting boss 13.

[0056] The reflective spacer 2 is a V-shaped sheet metal structure with a concave surface that is a high-reflectivity, energy-concentrating surface. Except for the four "notches" for mounting the pot support, the rest forms a relatively complete wall surface, resulting in optimal energy reflection and concentration. Furthermore, the four locations where it connects to the base screws are recessed grooves 21, minimizing surface contact and reducing energy conduction to the base. Compared to the method in embodiment 3, the reflective spacer 2 is not damaged by the cylindrical boss, thus achieving better energy concentration.

[0057] Example 4

[0058] like Figure 6 As shown, this embodiment discloses a high-efficiency energy-concentrating shield, including an outer shell 1, which is composed of an upper plate 11 and a base 12. The connection between the upper plate 11 and the base 12 is sealed by a sealing member 3. A shell cavity is formed inside the outer shell 1. The high-efficiency energy-concentrating shield includes a reflective spacer 2, which is disposed inside the shell cavity and faces the upper surface 103 of the shell cavity. The reflective spacer 2 is a light-colored thin metal plate with high heat transfer coefficient and high reflectivity.

[0059] like Figure 6 As shown, the high-efficiency energy-concentrating cover includes a first energy-concentrating heat storage cavity 101. One side of the first energy-concentrating heat storage cavity 101 is the upper surface of the shell cavity (i.e., the inner surface 112 of the upper plate 11), and the other side is the inner surface 122 of the base 12. The inner surface 122 of the base 12 is used to conduct heat and reflect heat toward the first energy-concentrating heat storage cavity 101.

[0060] like Figure 6 As shown, the outer surface 111 of the upper plate 11 is a dark, smooth curved surface, the inner surface 112 of the upper plate 11 is a dark, rough curved surface, the inner surface 122 of the base 12 is a light-colored, smooth curved surface, and the outer surface 121 of the base 12 is a dark, rough surface. The reflectivity of the inner surface 122 of the base 12 can be improved by processes such as precision machining, electroplating, Teflon application, or bonding of a light-colored thin material (such as aluminum foil).

[0061] Therefore, the heat absorption capacity of the outer surface 111 of the upper plate 11, the inner surface 112 of the upper plate 11, and the outer surface 121 of the base 12 is greater than the heat absorption capacity of the inner surface 122 of the base 12. The heat reflection capacity of the outer surface 111 of the upper plate 11 and the upper surface of the reflective partition 2 is greater than the heat reflection capacity of the inner surface 112 of the upper plate 11 and the outer surface 121 of the base 12.

[0062] The inner surface 112 of the upper plate 11 and the outer surface 121 of the base 12 are roughened to reduce their reflectivity. The outer surface 111 of the upper plate 11, the inner surface 112 of the upper plate 11, and the outer surface 121 of the base 12 are coated with a black (or dark-colored) coating (such as black ceramic film or black enamel), the dark color absorbing heat and reducing heat loss. The inner surface 122 of the base 12 (a thin metal plate with high thermal conductivity and a bright mirror finish) is concave, and its material properties have high reflectivity, which increases the rate at which heat from the energy-concentrating and heat-storing cavity is transferred to the bottom of the pot, thereby improving energy efficiency.

[0063] The outer surface 111 of the upper plate 11 is a black, highly smooth surface. The function of the outer surface 111 of the upper plate 11 is to concentrate and reflect heat. Black is more likely to absorb heat. Since the outer surface 111 of the upper plate 11 is closest to the burner head, the heat from the burner head will first come into contact with the outer surface 111 of the upper plate 11 when it is transferred and radiated. If the outer surface 111 of the upper plate 11 is a light-colored, highly reflective surface, when the heat absorption efficiency of the cooking appliance is low, too much heat will be reflected back and will inevitably be lost to the surrounding air through other paths. The outer surface 111 of the upper plate 11 can absorb some heat to reduce heat loss to the surrounding air.

[0064] The outer surface 121 of the base 12 is a rough black surface to reduce its reflectivity and increase its heat absorption capacity. The inner surface 122 of the base 12 is a glossy silver-white curved surface, mainly to enhance its heat reflection capacity and reduce heat absorption. The inner surface 122 of the base 12 continuously reflects energy upwards to the inner surface 112 of the upper plate 11. This increases the temperature gradient along the heat loss path from the burner head to the energy-concentrating shroud to the air, resulting in a larger temperature gradient between the outer surface 111 of the upper plate 11 and the outer surface 121 of the base 12. Assuming a constant energy level, a larger temperature gradient between the outer surface 111 of the upper plate 11 and the outer surface 121 of the base 12 leads to a higher temperature at the outer surface 111 of the upper plate 11, which in turn results in a higher temperature of the air near the cookware at the burner head. This forms a high-temperature barrier, reducing the rate of heat convection and radiation from the burner head to the lower-temperature external region.

[0065] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A high-efficiency energy-concentrating shield, comprising an outer shell, wherein a cavity is formed inside the outer shell, characterized in that, The high-efficiency energy-concentrating shield includes: A reflective spacer is disposed within the shell cavity and faces the upper surface of the shell cavity; The first energy-concentrating heat storage cavity has one side being the upper surface of the shell cavity and the other side being the upper surface of the reflective spacer. The reflective spacer is used to conduct heat and reflect the heat toward the first energy-concentrating heat storage cavity. The outer casing includes an upper plate and a base, and the shell cavity is formed between the upper plate and the base. The upper surface of the shell cavity is the inner surface of the upper plate, and the lower surface of the shell cavity is the inner surface of the base. The reflective spacer contacts the base only through a small plane, and the reflective spacer has no other contact with the base. The high-efficiency energy-concentrating cover also includes a second energy-concentrating and heat-storing cavity, one side of which is the lower surface of the shell cavity, and the other side is the lower surface of the reflective spacer. The upper surface of the reflective spacer is arranged parallel to the upper surface of the shell cavity, and there is a gap between the upper surface of the reflective spacer and the upper surface of the shell cavity. The connection between the upper plate and the base is sealed by a sealing element.

2. The high-efficiency energy-concentrating shield as described in claim 1, characterized in that, The distance between the upper surface of the reflective spacer and the upper surface of the shell cavity is 2.5mm-4mm.

3. The high-efficiency focusing shield as described in claim 1, characterized in that, The upper surface of the reflective spacer has a concave curved shape, the upper surface of the shell cavity has a concave curved shape, and the first energy-concentrating and heat-storing cavity is a V-shaped cavity formed between the upper surface of the shell cavity and the upper surface of the reflective spacer.

4. The high-efficiency energy-concentrating shield as described in claim 1, characterized in that, A protruding connecting post is formed on the lower surface of the shell cavity, a connecting piece is formed on the reflective spacer, the connecting piece is fixed on the connecting post, and the reflective spacer is separated from the lower surface of the shell cavity.

5. The high-efficiency focusing shield as described in claim 1, characterized in that, The lower surface of the reflective spacer is arranged parallel to the lower surface of the shell cavity, and there is a gap between the upper surface of the reflective spacer and the upper surface of the shell cavity.

6. The high-efficiency focusing shield as described in claim 1, characterized in that, The outer surface of the upper plate is a dark, smooth curved surface, the inner surface of the upper plate is a dark, rough curved surface, the upper surface of the reflective spacer is a light-colored, smooth curved surface, and the outer surface of the base is a dark, rough surface.

7. The high-efficiency focusing shield as described in claim 6, characterized in that, The heat absorption capacity of the outer surface of the upper plate, the inner surface of the upper plate, and the outer surface of the base is greater than the heat absorption capacity of the upper surface of the reflective spacer.

8. The high-efficiency focusing shield as described in claim 7, characterized in that, The outer surface of the upper plate, the inner surface of the upper plate, and the outer surface of the base are made of black ceramic film or black enamel; and / or the reflective spacer is a thin metal plate with a glossy mirror finish.

9. The high-efficiency focusing shield as described in claim 6, characterized in that, The heat reflection capacity of the outer surface of the upper plate and the upper surface of the reflective spacer is greater than that of the inner surface of the upper plate and the outer surface of the base.

10. The high-efficiency focusing shield as described in claim 1, characterized in that, The reflective spacer is a reflective coating formed on the inner surface of the base.

11. The high-efficiency focusing shield as described in claim 5, characterized in that, A protruding connecting post is formed on the lower surface of the shell cavity, and a connecting boss is formed on the reflective spacer plate. The connecting boss is fixed on the connecting post, and the reflective spacer plate is separated from the lower surface of the shell cavity.

12. The high-efficiency focusing shield as described in claim 5, characterized in that, A connecting boss is formed on the outer ring side of the shell cavity, and a connecting groove is formed on the outer ring side of the reflective spacer. The connecting groove is fixed on the connecting boss, and the reflective spacer is separated from the lower surface of the shell cavity.

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