Efficient energy gathering cover

Abstract

The invention discloses an efficient energy gathering cover which comprises an outer shell, a shell cavity is formed in the outer shell, and the efficient energy gathering cover is characterized in that the efficient energy gathering cover comprises a reflection partition plate, a first energy gathering plate and a second energy gathering plate, the reflection partition plate is arranged in the shell cavity and faces the upper surface of the shell cavity; one side of the first energy-gathering heat-storage cavity is the upper surface of the shell cavity, the other side of the first energy-gathering heat-storage cavity is the upper surface of the reflection spacing plate, and the reflection spacing plate is used for conducting heat and reflecting the heat towards the first energy-gathering heat-storage cavity. Heat energy of a cooking range combustion area is firmly gathered and stored at the head of the combustor, heat loss of the head of the combustor and an external low-temperature area is reduced, and therefore energy efficiency is improved.

Description

[0001] This application is a divisional of a Chinese invention patent with an application date of October 20, 2020, application number 202011125258.6, and name “High-efficiency energy-gathering hood”. Technical Field

[0002] The invention relates to a high-efficiency energy-gathering cover. Background Art

[0003] Gas stoves are now generally developing towards high load and high energy efficiency. In order to improve energy efficiency, the structure of the pot support has evolved from the original simple foot form to a single-layer energy-gathering cover or double-layer energy-gathering cover. However, although the use of a double-layer energy-gathering cover has improved energy efficiency, further improving the efficiency of the gas stove has encountered a bottleneck. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defect in the prior art that the energy efficiency of the double-layer energy-gathering hood is limited by the bottle diameter and the energy efficiency cannot be further improved, and to provide a high-efficiency energy-gathering hood.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A high-efficiency energy-gathering cover comprises an outer shell, wherein a shell cavity is formed inside the outer shell, and the high-efficiency energy-gathering cover comprises:

[0007] A reflective spacer plate, the reflective spacer plate is arranged in the shell cavity and is arranged toward the upper surface of the shell cavity;

[0008] A first energy-concentrating heat-storing cavity, wherein one side of the first energy-concentrating heat-storing cavity is the upper surface of the shell cavity, and the other side is the upper surface of the reflective spacer, and the reflective spacer is used to conduct heat and reflect the heat toward the first energy-concentrating heat-storing cavity;

[0009] The outer shell 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, the lower surface of the shell cavity is the inner surface of the base, the reflective spacer is in contact with the base only by a small plane, and the reflective spacer is in contact with the base in no other place.

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

[0011] The present invention increases the heat in the first energy-gathering heat storage cavity by means of a reflective spacer, so that the heat energy in the combustion zone of the stove head is firmly gathered and stored in the burner head, reducing the heat loss between the burner head and the external low-temperature zone, thereby improving energy efficiency. The reflective spacer is in contact with the base of the outer shell only by a small plane, and the reflective spacer is in contact with the base of the outer shell at no other place, which can reduce the heat conduction between the reflective spacer and the base, making the reflective spacer have a stronger heat storage function.

[0012] Preferably, the high-efficiency energy-gathering cover further comprises a second energy-gathering and heat-storing cavity, one side of the second energy-gathering and heat-storing cavity 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 plate is arranged parallel to the upper surface of the shell cavity, and there is a spacing distance between the upper surface of the reflective spacer plate and the upper surface of the shell cavity.

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

[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 connection column is formed on the lower surface of the shell cavity, a connection piece is formed on the reflective spacer, the connection piece is fixed on the connection column, and the reflective spacer is separated from the lower surface of the shell cavity.

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

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

[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 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 black porcelain film or black enamel; and / or the reflective spacer is a metal sheet with a bright mirror surface.

[0022] Preferably, the heat reflecting capabilities of the outer surface of the upper plate and the upper surface of the reflective spacer are greater than the heat reflecting capabilities 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 connection column is formed on the lower surface of the shell cavity, a connection boss is formed on the reflective spacer plate, the connection boss is fixed on the connection column, and the reflective spacer plate 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, 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 improvement effect of the present invention is that the present invention allows the heat energy of the stove combustion zone to be firmly gathered and stored in the burner head, reducing the heat loss between the burner head and the external low-temperature zone, thereby improving energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structural decomposition of the high-efficiency energy focusing cover of Example 1 of the present invention.

[0028] Figure 2 This is a schematic diagram of the cross-sectional structure of the high-efficiency energy focusing hood of Example 1 of the present invention.

[0029] Figure 3 It is a schematic diagram of the structural decomposition of the high-efficiency energy focusing cover of Example 2 of the present invention.

[0030] Figure 4 This is a schematic diagram of the cross-sectional structure of the high-efficiency energy focusing hood of Example 2 of the present invention.

[0031] Figure 5 It is a schematic diagram of the structural decomposition of the high-efficiency energy focusing cover of Example 3 of the present invention.

[0032] Figure 6 It is a schematic diagram of the cross-sectional structure of the high-efficiency energy focusing hood of Example 4 of the present invention. DETAILED DESCRIPTION

[0033] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0034] Example 1

[0035] like Figure 1 and Figure 2 As shown, this embodiment discloses a high-efficiency energy-gathering cover, 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 seal 3. A shell cavity is formed inside the outer shell 1, and the high-efficiency energy-gathering cover includes a reflective spacer 2, which is arranged in the shell cavity and faces the upper surface 103 of the shell cavity. The reflective spacer 2 is a light-colored metal sheet with a high heat transfer coefficient and high reflectivity.

[0036] like Figure 2 As shown, the high-efficiency energy-gathering cover comprises a first energy-gathering heat-storing cavity 101, one side of the first energy-gathering 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, and the reflective spacer 2 is used to conduct heat and reflect the heat toward the first energy-gathering heat-storing cavity 101. Figure 2 As shown, the high-efficiency energy-gathering cover further includes a second energy-gathering heat-storing cavity 102, one side of the second energy-gathering 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, the upper surface 201 of the reflective spacer 2 of this embodiment is arranged parallel to the upper surface 103 of the shell cavity, and there is a spacing distance between the upper surface 201 of the reflective spacer 2 and the upper surface 103 of the shell cavity. The spacing distance 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 when the spacing between the two is 2.5mm-4mm, the energy focusing effect is best.

[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 heat-storage 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 connection posts 13 are formed on the lower surface of the shell cavity, and four connection pieces 21 are formed on the reflective spacer 2, which are fixed on the connection posts 13, and the reflective spacer 2 is kept separated from the lower surface 104 of the shell cavity. Therefore, the reflective spacer 2 and the base 12 are only in contact with four small planes and fixed with screws. In addition, the reflective spacer 2 has no other places in contact with the base 12, which can reduce the heat conduction between the reflective spacer 2 and the base 12, and the reflective spacer 2 has a stronger heat storage and energy storage function.

[0040] The high-efficiency energy-gathering hood of this embodiment adds a reflective spacer plate 2. The reflective spacer plate 2 can be set to a silver-white thin plate with high thermal conductivity, fast heat transfer and high reflectivity. The reflective spacer plate 2 separates the interior of the high-efficiency energy-gathering hood into two energy-gathering heat storage cavities (a first energy-gathering heat storage cavity 101 and a second energy-gathering heat storage cavity 102). The two energy-gathering heat storage cavities have double energy-gathering heat storage, which firmly locks the heat of the burner head, reduces heat loss and improves energy efficiency.

[0041] The high-efficiency energy-gathering hood of this embodiment is designed to install a highly reflective reflective partition plate 2 near the base 12, so that the temperature gradient of the heat loss path from the burner head to the outside is increased, that is, the rate of heat loss from the high-temperature area of ​​the burner to the external low-temperature area is reduced, thereby improving energy efficiency.

[0042] The seal 3 is a sealing elastomer. When the gas appliance is burning, the air inside will not flow out after being heated, so that the amount of air in the "energy-gathering heat storage cavity" can be kept constant. When the stove is working, when the cooking utensils are unable to absorb the heat generated by the stove combustion, the air in the "energy-gathering heat storage cavity" can act as an energy storage carrier as a heat storage meson, firmly locking the energy that escapes outwards at the stove head, reducing the heat loss from the stove head to the air outside, thereby improving energy efficiency.

[0043] Among them, unlike the energy-gathering hood that improves energy efficiency by vacuuming, this theory is not valid here. The present solution is to form an "energy-gathering heat-storing cavity" between the upper plate 11 and the base 12 to ensure 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 energy storage. If the interior is vacuum, there is no medium in this cavity and it has no ability to store heat. The vacuum energy-gathering hood can only play a role in heat insulation. When the cooking utensil cannot immediately absorb the heat generated during combustion, the heat is bound to lose to the outside from the air inlet around the pot bracket. It has no heat storage function and is not as good as the solution of this embodiment in improving energy efficiency.

[0044] Example 2

[0045] like Figure 3 and Figure 4As shown, this embodiment discloses a high-efficiency energy-gathering cover, 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 seal 3. A shell cavity is formed inside the outer shell 1, and the high-efficiency energy-gathering cover includes a reflective spacer 2, which is arranged in the shell cavity and faces the upper surface 103 of the shell cavity. The reflective spacer 2 is a light-colored metal sheet with a high heat transfer coefficient and high reflectivity.

[0046] like Figure 4 As shown, the high-efficiency energy-gathering hood includes a first energy-gathering heat-storage cavity 101, one side of the first energy-gathering 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, and the reflective spacer 2 is used to conduct heat and reflect the heat toward the first energy-gathering heat-storage cavity 101.

[0047] like Figure 4 As shown, the lower surface of the reflective spacer plate 2 of this embodiment is arranged parallel to the lower surface of the shell cavity (i.e., the inner surface of the base 12), and there is a spacing distance between the upper surface 20 of the reflective spacer plate 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 connection column 13 is formed on the inner surface of the base 12, and a connection boss 21 is formed on the reflective spacer 2, and the connection boss 21 is fixed on the connection column 13. The protruding connection column 13 has a low processing cost, because the threaded hole is processed on the vertical connection column 13, which is easier to process and has a 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] Thus, 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 spacer 2. The heat reflection capacity of the outer surface 111 of the upper plate 11 and the upper surface of the reflective spacer 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 sprayed with a black (or dark) coating (such as a black ceramic film or black enamel), and the dark color absorbs heat and reduces heat loss. The upper surface 20 of the reflective partition plate 2 is a concave surface of the partition (a metal sheet with a high thermal conductivity and a bright mirror surface), and its material property is high reflectivity, which increases the rate at which the heat of the energy-gathering heat storage cavity acts on the bottom of the pot, thereby improving energy efficiency.

[0052] The outer surface 111 of the upper plate 11 is a black high-smooth surface. The function of the outer surface 111 of the upper plate 11 is to gather and reflect heat. Black is easier to absorb heat because the outer surface 111 of the upper plate 11 is closest to the burner head. The heat from the burner head first hits 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 utensil is low, too much heat will be reflected back and will inevitably be dissipated into the surrounding air through other paths, so that the outer surface 111 of the upper plate 11 can absorb part of the heat and reduce heat loss to the surrounding air.

[0053] The outer surface 121 of the base 12 is a rough black surface, in order to reduce its reflectivity and increase its heat absorption capacity; the upper surface 20 of the reflective spacer 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 spacer 2 continuously reflects energy upward to the inner surface 112 of the upper plate 11, so that the temperature gradient of the heat loss path of the burner head-energy collecting cover-air can be increased, that is, the temperature gradient from the outer surface 111 of the upper plate 11 to the outer surface 121 of the base 12 is large. Assuming that the energy is constant, if the temperature gradient from the outer surface 111 of the upper plate 11 to the outer surface 121 of the base 12 is large, the higher the temperature at the end of the outer surface 111 of the upper plate 11, that is, the higher the temperature of the air near the burner head pot, a high-temperature barrier is formed, which can reduce the rate of heat convection and heat radiation from the burner head to the external low-temperature zone.

[0054] Example 3

[0055] like Figure 5 As shown, the difference between this embodiment and embodiment 4 is that a connecting boss 13 is formed on the outer ring side of the shell cavity (the outer ring side of the chassis 12), and a connecting groove 21 is formed on the outer ring side of the reflective spacer plate 2, and the connecting groove 21 is fixed on the connecting boss 13.

[0056] The reflective spacer 2 is a V-shaped sheet metal structure, and the concave surface is a highly reflective surface for energy collection. Except for the four "notches" for installing the pot bracket, other places form a relatively complete wall surface, and the energy reflection and collection ability is optimal. And the four places where the base screws are installed are connected to the grooves 21, which have a relatively small surface contact and can minimize the conduction of energy to the base. Compared with the method of embodiment 3, the reflective spacer 2 will not be damaged by the cylindrical boss, so the energy collection effect is better.

[0057] Example 4

[0058] like Figure 6 As shown, this embodiment discloses a high-efficiency energy-gathering cover, 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 seal 3. A shell cavity is formed inside the outer shell 1, and the high-efficiency energy-gathering cover includes a reflective spacer 2, which is arranged in the shell cavity and faces the upper surface 103 of the shell cavity. The reflective spacer 2 is a light-colored metal sheet with a high heat transfer coefficient and high reflectivity.

[0059] like Figure 6 As shown, the high-efficiency energy-gathering hood includes a first energy-gathering heat-storage cavity 101, one side of the first energy-gathering 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, and the inner surface 122 of the base 12 is used to conduct heat and reflect heat toward the first energy-gathering 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 smooth curved surface, and the outer surface 121 of the base 12 is a dark rough surface. The inner surface 122 of the base 12 can be processed by fine turning, electroplating, Teflon or pasting light thin material (such as aluminum foil) to improve the reflectivity of this surface.

[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 spacer 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 sprayed with a black (or dark) coating (such as a black ceramic film or black enamel), and the dark color absorbs heat and reduces heat loss. The inner surface 122 of the base 12 (a metal sheet with a high thermal conductivity and a bright mirror surface) is a concave surface, and its material property is high reflectivity, which increases the rate at which the heat of the energy-gathering heat storage cavity acts on the bottom of the pot, thereby improving energy efficiency.

[0063] The outer surface 111 of the upper plate 11 is a black high-smooth surface. The function of the outer surface 111 of the upper plate 11 is to gather and reflect heat. Black is easier to absorb heat because the outer surface 111 of the upper plate 11 is closest to the burner head. The heat from the burner head first hits 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 utensil is low, too much heat will be reflected back and will inevitably be dissipated into the surrounding air through other paths, so that the outer surface 111 of the upper plate 11 can absorb part of the heat and reduce heat loss to the surrounding air.

[0064] The outer surface 121 of the base 12 is a rough black surface, in order to reduce its reflectivity and increase its heat absorption capacity; the inner surface 122 of the base 12 is a bright 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 upward to the inner surface 112 of the upper plate 11, so that the temperature gradient of the heat loss path of the burner head-energy collecting cover-air can be increased, that is, the temperature gradient from the outer surface 111 of the upper plate 11 to the outer surface 121 of the base 12 is large. Assuming that the energy is constant, if the temperature gradient from the outer surface 111 of the upper plate 11 to the outer surface 121 of the base 12 is large, the higher the temperature at the end of the outer surface 111 of the upper plate 11, that is, the higher the temperature of the air near the cookware of the burner head, a high-temperature barrier is formed, which can reduce the rate of heat convection and heat radiation from the burner head to the external low-temperature zone.

[0065] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A high-efficiency energy-gathering hood, comprising an outer shell, wherein a shell cavity is formed inside the outer shell, characterized in that: The high-efficiency energy-gathering cover comprises: A reflective spacer plate, the reflective spacer plate is arranged in the shell cavity and is arranged toward the upper surface of the shell cavity; A first energy-concentrating heat-storing cavity, wherein one side of the first energy-concentrating heat-storing cavity is the upper surface of the shell cavity, and the other side is the upper surface of the reflective spacer, and the reflective spacer is used to conduct heat and reflect the heat toward the first energy-concentrating heat-storing cavity; The outer shell 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, the lower surface of the shell cavity is the inner surface of the base, the reflective spacer is in contact with the base only by a small plane, and the reflective spacer is in contact with the base in no other place.

2. The high-efficiency energy-gathering cover according to claim 1, characterized in that: The high-efficiency energy-gathering cover also includes a second energy-gathering and heat-storing cavity, one side of the second energy-gathering and heat-storing cavity is the lower surface of the shell cavity, and the other side is the lower surface of the reflective spacer plate.

3. The high-efficiency energy-gathering cover according to claim 2, characterized in that: The upper surface of the reflective spacer plate is arranged parallel to the upper surface of the shell cavity, and there is a spacing distance between the upper surface of the reflective spacer plate and the upper surface of the shell cavity.

4. The high-efficiency energy-gathering cover according to claim 3, characterized in that: The spacing distance between the upper surface of the reflective spacer plate and the upper surface of the shell cavity is 2.5 mm-4 mm.

5. The high-efficiency energy-gathering cover according to claim 3, 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 heat-storage cavity is a V-shaped cavity formed between the upper surface of the shell cavity and the upper surface of the reflective spacer.

6. The high-efficiency energy-gathering cover according to claim 2, characterized in that: A protruding connection column is formed on the lower surface of the shell cavity, a connection piece is formed on the reflective spacer plate, the connection piece is fixed on the connection column, and the reflective spacer plate is separated from the lower surface of the shell cavity.

7. The high-efficiency energy-gathering cover according to claim 1, characterized in that: The lower surface of the reflective spacer plate is arranged parallel to the lower surface of the shell cavity, and there is a spacing distance between the upper surface of the reflective spacer plate and the upper surface of the shell cavity.

8. The high-efficiency energy-gathering cover according to claim 1, characterized in that: The connection between the upper plate and the base is sealed by a sealing member.

9. The high-efficiency energy-gathering cover according to 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 smooth curved surface, and the outer surface of the base is a dark rough surface.

10. The high-efficiency energy-gathering cover according to claim 9, 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.

11. The high-efficiency energy-gathering cover according to claim 10, 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 black porcelain film or black enamel; and / or the reflective spacer is a metal sheet with a bright mirror surface.

12. The high-efficiency energy-gathering cover according to claim 9, characterized in that: The heat reflection capabilities of the outer surface of the upper plate and the upper surface of the reflective spacer are greater than the heat reflection capabilities of the inner surface of the upper plate and the outer surface of the base.

13. The high-efficiency energy-gathering cover according to claim 1, characterized in that: The reflective spacer is a reflective coating formed on the inner surface of the base.

14. The high-efficiency energy-gathering cover according to claim 7, characterized in that: A protruding connection column is formed on the lower surface of the shell cavity, a connection boss is formed on the reflective spacer plate, the connection boss is fixed on the connection column, and the reflective spacer plate is separated from the lower surface of the shell cavity.

15. The high-efficiency energy-gathering cover according to claim 7, characterized in that: A connecting boss is formed on the outer ring side of the shell cavity, 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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