Solar heating device

Abstract

The invention provides a solar heating device which comprises a heating device and a heated device, the heating device is a condensing lens, and the heated device comprises a metal cooker; the condensing lens can focus sunlight on the metal cooker. According to the solar heating device provided by the invention, the condensing lens is used for focusing sunlight to replace a reflector structure of a common solar cooker, and the cooker can be placed close to the ground for heating only by enabling one side of the condensing lens to face the sunlight and placing the cooker on the other side, so that the weight does not need to be considered when the cooker is selected, and personnel operation is also facilitated; on one hand, different cooking modes such as barbecue can be used, and on the other hand, the personnel operation position is located on the backlight face of the condensing lens, and illumination receiving of the condensing lens is not affected. In addition, the focus is close to the ground, and the condensation light spot is located on the ground, so that personnel can easily identify the condensation light spot during operation and is not easy to burn by mistake.

Description

Technical Field

[0001] The invention relates to the field of solar energy, and in particular to a solar energy heating device. Background Art

[0002] In the western region of my country, due to the long sunshine hours, solar stoves can be used for daily water boiling and cooking, which can greatly reduce greenhouse gases such as carbon dioxide produced by burning firewood (grass, wood), gas, and coal. However, in use, solar stoves are composed of a parabolic reflector structure placed on the ground and a vertical bracket, so there are various disadvantages: such as the overall structure is large and bulky; the angle is relatively fixed and affected by the angle of sunlight; the cooking utensils can only be placed in the spotlight on the bracket, so they are generally only used for boiling water. If other cooking is required, the user must operate under the scorching sun and pay attention to the position to avoid blocking the sunlight. The load-bearing capacity of the bracket is also limited, and the cooking method is very limited; in addition, since the focus of the spotlight is located in mid-air, there is a risk of burns when operating. Summary of the invention

[0003] To solve the above problems, the present invention provides a solar heating device, including a heating device and a heat receiving device, the heating device is a focusing lens, and the heat receiving device includes a metal cooker; the focusing lens can focus sunlight on the metal cooker.

[0004] Furthermore, the focusing lens includes a Fresnel lens.

[0005] Furthermore, the focusing lens also includes a frame, and the Fresnel lens is fixed in the frame. The frame is square, and the Fresnel lens is also square.

[0006] Furthermore, the frame includes four aluminum frames that can be detachably connected end to end, and the frames are provided with grooves corresponding to the thickness of the Fresnel lens in the direction of the Fresnel lens so that the edge of the Fresnel lens can be embedded and fixed in the frame.

[0007] Furthermore, the Fresnel lens is a single-focus lens made of acrylic material divided into 9 lenses of the same size in a tic-tac-toe pattern, and a label for identifying the lens serial number and installation direction is provided on the side of the lens.

[0008] Furthermore, the frame also includes two fixing strips, both ends of which are detachably connected to two opposite frame frames on the frame, and the connection positions of the two fixing strips on the frame are respectively located at 1 / 3 and 2 / 3 of the length of the frame. The two fixing strips are of the same length and are installed on the frame in parallel. When 9 lenses of the same size are installed in the frame, they are exactly located between the lenses, fixing the lenses so that they do not fall out of the frame.

[0009] Furthermore, the heating device further comprises a reflector, the heating device further comprises a bracket, the metal cooker is installed above the bracket, and the reflector is arranged below the bracket. The reflector is a concave mirror.

[0010] Furthermore, it also includes a fixing frame, on which the focusing lens is detachably mounted, and on which the focusing lens can rotate up and down.

[0011] The solar heating device provided by the present invention uses a condensing lens to focus sunlight to replace the reflector structure of an ordinary solar cooker. It only needs to face the sunlight on one side of the condensing lens and place the cooker on the other side. The cooker can be placed close to the ground for heating, so the weight does not need to be considered when selecting the cooker. It is also convenient for personnel to operate. On the one hand, different cooking methods can be used, such as grilling. On the other hand, the operating position of the personnel is located on the backlight side of the condensing lens, which will not affect the condensing lens receiving light. In addition, the focus is close to the ground, and the position of the condensing spot is located on the ground, which is easy for personnel to identify during operation and is not easy to be burned by mistake.

[0012] In addition, the present invention also proposes to use a Fresnel lens as a focusing lens. Since the Fresnel lens can be made of materials such as acrylic, it is light in weight and easy to carry.

[0013] In addition, the present invention also proposes a method for splitting the Fresnel lens, which can be disassembled and stacked at ordinary times, occupying a small space, and then assembled with a special frame when in use. In this way, the overall focusing lens can be made very large, thereby improving the heating efficiency.

[0014] Furthermore, since the light of the focusing lens is from top to bottom, the present invention also proposes that a reflector and a bracket can be matched to reflect the light to the bottom of the cooker on the bracket, so that the heating and cooking method can be selected more flexibly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of an embodiment of the solar heating device provided by the present invention.

[0016] Figure 2 It is a schematic diagram of another embodiment of the solar heating device provided by the present invention.

[0017] Figure 3 It is a schematic diagram of a focusing lens of a solar heating device provided by the present invention.

[0018] Figure 4 It is a schematic diagram of a frame and a Fresnel lens of a solar heating device provided by the present invention.

[0019] Figure 5 It is a schematic diagram of the segmentation of the Fresnel lens of the solar heating device provided by the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] like Figure 1 The solar heating device shown includes a heating device 1 and a heat receiving device 2. The heating device is a square Fresnel lens 11 and a square frame 12 surrounding the Fresnel lens. The Fresnel lens is fixed in the frame to form a focusing lens, which can focus sunlight on the heat receiving device.

[0022] The heating device comprises a metal cooker 21, and during use, the sunlight gathered by the condensing lens is irradiated on the metal cooker for heating. Since during use, the gathered light is usually irradiated from top to bottom or slightly tilted, the metal cooker can be directly used for barbecue cooking using a grill.

[0023] When used for stewing or boiling water, a cooker with a larger side wall area can be used, and the side wall of the cooker can be matte-finished or coated with a black heat-absorbing coating.

[0024] In order to facilitate the adjustment of the angle, the focusing lens can also be installed on a fixing frame 3 which is easy to disassemble, and the focusing lens can be rotated up and down on the fixing frame.

[0025] When in use, you only need to point one side of the condensing lens toward the sun and place the metal cooker on the other side, so that the metal cooker can be placed close to the ground for heating. Therefore, you do not have to consider the weight when choosing metal cookers (traditional solar cookers use a bulky bracket to suspend the cooker in the air, and it is still easy to tip over if it is too heavy). It is also convenient for personnel to operate. On the one hand, different cooking methods can be used, such as barbecue. On the other hand, the operating position of personnel is usually located on the backlight side / exit side of the condensing lens, which will not affect the condensing lens receiving light, and the operation is flexible. In addition, since the spotlight is located on the ground, it is easy for personnel to identify it with the naked eye during operation and is not easy to be burned by mistake.

[0026] like Figure 2 As shown, in order to further improve the cooking habits of general cookers, a shorter bracket 22 and a reflector 23 can be set. The metal cooker is installed above the bracket, and the reflector is set below the bracket to reflect the concentrated light to the bottom of the cooker. At this time, the metal cooker can be a pot, a kettle, etc., and the bottom is matte treated or coated with a heat-absorbing coating. In order to further concentrate the light, the reflector can be a concave mirror. The shorter bracket can be made of local materials, such as stone bricks, and the reflector is also easier to carry, so it does not cause inconvenience.

[0027] like Figure 3 As shown, in order to further improve the portability of the whole device and meet the needs of people during outdoor travel, the frame is designed into four frames 13 that can be detachably connected end to end, and the frames are made of aluminum.

[0028] like Figure 4As shown, a groove 14 corresponding to the thickness of the Fresnel lens is provided in the frame in the direction facing the Fresnel lens, so that the edge of the Fresnel lens can be embedded and fixed in the frame.

[0029] In addition, if Figure 5 As shown, the Fresnel lens can be made of acrylic material, and a whole single-focus lens is divided into 9 lenses of the same size in a tic-tac-toe pattern 15. This is not only light in weight, but also more convenient to carry. When not in use, they can be stacked together to avoid a large Fresnel lens being difficult to carry, and the overall area of ​​the Fresnel lenses when in use can be very large, effectively improving the heating efficiency.

[0030] like Figure 1 , 2 As shown in FIG. 3 , in order to allow the nine lenses to be assembled and installed in the frame, the frame also includes two fixing strips 16 of the same length, the two ends of which are detachably connected to the two opposite frames on the frame, usually the top and bottom frames, and the connection positions of the two fixing strips on the frame are respectively located at 1 / 3 and 2 / 3 of the length of the frame. The two fixing strips are installed on the frame in parallel. When the nine lenses of the same size are installed in the frame, the fixing strips are located at the corresponding joint gaps between the three rows of lenses to fix the lenses so that they do not fall out of the frame. In order to reduce the impact on light, the fixing strips can also be made of transparent acrylic material.

[0031] In order to ensure that the 9 lenses can be installed in the frame in the correct order and direction, so that the light can be focused after the combined installation, and to avoid inconsistent focus of each lens due to wrong installation order and direction, a label 17 is attached to the side of the lens to identify the serial number and installation direction. The label attached to the side does not affect the incidence and emission of light from the front and back sides of the lens.

[0032] The above is the content of the embodiment of the present invention.

Claims

1. A solar heating device, comprising a heating device and a heat receiving device, wherein the heating device is a focusing lens, and the heat receiving device comprises a metal cooker; the focusing lens can focus sunlight on the metal cooker.

2. The solar heating device according to claim 1, characterized in that: The condenser lens includes a Fresnel lens.

3. The solar heating device according to claim 2, characterized in that: The condenser lens also includes a frame, and the Fresnel lens is fixed in the frame; the frame is square, and the Fresnel lens is also square.

4. The solar heating device according to claim 3, characterized in that: The frame comprises four aluminum frames which can be detachably connected end to end. The frames are provided with grooves corresponding to the thickness of the Fresnel lens in the direction of the Fresnel lens so that the edge of the Fresnel lens can be embedded and fixed in the frame.

5. The solar heating device according to claim 4, characterized in that: The Fresnel lens is a single-focus lens made of acrylic material, which is divided into 9 lenses of the same size in a tic-tac-toe pattern. A label for identifying the lens serial number and installation direction is provided on the side of the lens.

6. The solar heating device according to claim 5, characterized in that: The frame also includes two fixing strips, both ends of which are detachably connected to two opposite frame borders on the frame, and the connection positions of the two fixing strips on the frame are respectively located at 1 / 3 and 2 / 3 of the length of the frame. The two fixing strips are of the same length and are installed on the frame in parallel. When 9 lenses of the same size are installed in the frame, they are located exactly between the lenses to fix the lenses so that they do not fall out of the frame.

7. The solar heating device according to claim 6, characterized in that: It also includes a reflector, and the heating device also includes a bracket. The metal cooker is installed above the bracket, and the reflector is arranged below the bracket; the reflector is a concave mirror. The solar heating device according to claim 7 is characterized in that: It also includes a fixing frame, on which the focusing lens is detachably mounted, and on which the focusing lens can rotate up and down.

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