Flow guide chamber and lamp comprising same

Abstract

The utility model relates to the field of photocatalysis, and provides a flow guide chamber and a lamp comprising the same. The cavity comprises a side wall, the upper end of the cavity is an air inlet end, the lower end of the cavity is an air outlet end, and the cavity further comprises a heat dissipation base and a flow guide boss; the heat dissipation base is fixedly arranged in the cavity through a connecting rod, one end of the connecting rod is connected with the heat dissipation base, and the other end of the connecting rod is connected with the side wall; the flow guide boss is arranged on the inner wall, opposite to the heat dissipation base, of the cavity in a surrounding mode, the thickness of the flow guide boss is gradually reduced from outside to inside, and a gap is formed between the flow guide boss and the heat dissipation base. The lamp comprises a bulb, a fan, an ultraviolet lamp, a photocatalytic layer and the cavity, and the photocatalytic layer is arranged on the lower side of the flow guide boss of the cavity. The bulb is arranged on the heat dissipation base of the cavity. Due to the limitation of the flow guide boss, the air forms a swirling vortex on the lower side of the flow guide boss, and the photocatalytic layer is arranged on the lower side of the flow guide boss, so that organic pollutants in the air fully act with a photocatalyst, and the photocatalytic efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of photocatalysis, and more particularly, to a diversion chamber and a lamp including the same. Background Art

[0002] Lamps with photocatalytic functions can simultaneously meet the functions of lighting and purifying air. They have great market prospects in places such as hospitals and meeting rooms with a large number of people, or offices and bedrooms where individuals often stay.

[0003] Under the irradiation of excitation light, a photocatalyst (such as titanium dioxide) absorbs light energy, stimulates electron transition, and forms electron-hole pairs; among them, electrons combine with oxygen to generate superoxide radicals, and holes react with water or hydroxide ions to generate hydroxyl radicals. The radicals with strong oxidation characteristics decompose organic pollutants such as formaldehyde and benzene into harmless substances such as water and carbon dioxide, achieving air purification. During the use of the lamp, heat is generated, and a higher temperature will cause the electron-hole pairs in the photocatalyst to recombine faster, reducing the generated hydroxyl radicals and superoxide radicals, thereby reducing the photocatalytic efficiency. High-efficiency photocatalysis requires that organic pollutants and the photocatalyst act sufficiently and quickly, that is, the photocatalyst quickly adsorbs organic pollutants for photocatalytic reaction and quickly desorbs after the reaction. However, when the air flow rate is large, the interaction time is short, and the reaction cannot be sufficient; when the air flow rate is small, organic pollutant molecules are not easily adsorbed and desorbed, and it is difficult to react with the photocatalyst inside the photocatalytic layer, resulting in low purification efficiency.

[0004] In summary, due to the insufficient interaction between organic pollutants and the photocatalyst, the photocatalytic efficiency in the existing system is low. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a diversion chamber and a lamp including the same to solve the problem of low photocatalytic efficiency in the existing system due to the insufficient interaction between organic pollutants and the photocatalyst in view of the above deficiencies in the prior art.

[0006] The present application sets a guide boss on the side wall of the chamber so that the air forms a vortex flow on the lower side of the guide boss. The setting of the guide boss makes the cross section of the air channel suddenly decrease. According to the Bernoulli principle, the flow speed of the air is improved. The flow speed of the air at the vortex flow is relatively large, and it gathers on the lower side of the guide boss, so that the organic pollutants in the vortex flow can fully react with the photocatalyst in the photocatalytic layer arranged there; the air flow speed during interaction is relatively large, and it is easy to desorb and adsorb. Due to the formation of the vortex flow, the organic pollutants and the photocatalyst have a longer action time. At the same time, the guide boss is arranged around the heat dissipation base, and the fast-flowing air dissipates the heat in time, avoiding the accumulation of heat, so that the local temperature will not rise rapidly; the heat dissipation base heats the passing air, so that the kinetic energy of the organic pollutants in the air is increased, the molecular motion is accelerated, and the collision frequency with the surface of the photocatalyst is increased, and it is also easier to adsorb and desorb, thereby improving the photocatalytic efficiency.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] The present application provides a guide chamber, which includes a side wall, the upper end of the chamber is an air inlet end, the lower end of the chamber is an air outlet end, and the chamber also includes a heat dissipation base and a guide boss; the heat dissipation base is fixedly arranged in the chamber by a connecting rod, one end of the connecting rod is connected to the heat dissipation base, and the other end of the connecting rod is connected to the side wall; the guide boss is arranged on the inner wall of the chamber opposite to the heat dissipation base, and the thickness of the guide boss gradually decreases from the outside to the inside, and there is a gap between the guide boss and the heat dissipation base.

[0009] When in use, the heat sink is connected to the bulb, and the temperature of the heat sink will increase during operation. The passing air is heated to increase the kinetic energy of the organic pollutants, increase the probability of collision with the photocatalyst, and make it easier to adsorb and desorb, thereby improving the purification efficiency. At the same time, the air flowing through takes away the heat emitted by the heat sink to prevent its temperature from rising. When the air passes through the guide boss, the flow cross-section first decreases and then increases, forming a vortex on the lower side of the guide boss, and the flow speed of the air in the vortex is relatively high. The speed is relatively high, and it can gather under the guide boss for a long time, which makes the air there suitable for the photocatalyst to fully react. At the same time, it satisfies the easy adsorption and desorption required for high-efficiency photocatalysis, as well as a long action time. When the chamber of the present application is used for photocatalysis, the photocatalytic efficiency is relatively high.

[0010] Furthermore, the upper surface of the guide boss is an inclined surface, with one end close to the side wall higher than the end close to the heat dissipation base, and the lower surface of the guide boss is a horizontal surface. The inclined upper surface gradually reduces the air flow cross section, and the moderate guide slope can prevent the airflow from being too rapid and stagnant.

[0011] Furthermore, the included angle between the upper surface and the lower surface is 30 - 60°. If the included angle is too small, the flow path of the air current in the chamber is too long, which may lead to too slow air current speed, thus reducing the air circulation efficiency; if the included angle is too large, strong eddy currents or pressure losses may occur to the air current, affecting the air purification effect. Such an included angle can form a swirling eddy current with a relatively large speed and a long duration on the lower side of the flow guiding boss. The lower surface is a plane, which is convenient for arranging the ultraviolet lamp, so that the light emitted by the ultraviolet lamp radiates downward, enabling the light to uniformly irradiate the surface of the photocatalytic layer and fully irradiate the photocatalytic layer.

[0012] Furthermore, the width of the flow guiding boss is greater than one-eighth of the chamber diameter and less than one-sixth of the chamber diameter. This ensures that the flow guiding boss neither occupies too much space nor is too narrow, and can effectively guide the air current to pass through; the smaller heat dissipation base provides enough space for the air current to pass through smoothly without blocking the air current flow, thus maintaining the smoothness of the air current in the chamber. The gap helps the air current take away heat, improve the heat dissipation effect, and enhance the photocatalytic efficiency.

[0013] This application also proposes a lamp, which includes a bulb, a fan, an ultraviolet lamp, a photocatalytic layer, and the above-mentioned chamber. The photocatalytic layer is arranged on the lower side of the flow guiding boss of the chamber; the bulb is arranged on the heat dissipation base of the chamber. When in use, the temperature of the heat dissipation base rises, and the photocatalytic layer is in the swirling eddy current formed by the flow guiding chamber, enabling the photocatalyst to fully act on the organic pollutants in the air.

[0014] Furthermore, the photocatalytic layer is a porous structure with a photocatalyst attached to the surface. The porous structure increases the surface area where the photocatalyst can be arranged, and there are more photocatalysts, enabling more pollutant molecules to come into contact with the photocatalyst, thus enhancing the purification efficiency; at the same time, the porous structure reduces the contact area between the photocatalyst and the heat dissipation base. Therefore, the temperature of the photocatalyst will not increase through heat transfer, thereby reducing the photocatalytic efficiency, and the rapid flow of the swirling eddy current can also take away part of the heat on the surface of the photocatalyst.

[0015] Furthermore, the ultraviolet lamp is fixedly arranged on the lower surface of the flow guiding boss. Arranging the ultraviolet lamp on the lower surface can enable the light field to uniformly irradiate the photocatalytic layer. Ultraviolet light is in the excitation band of photocatalyst materials such as titanium dioxide, which can effectively excite electron transitions, initiate the photocatalytic reaction, and improve the decomposition efficiency of pollutants.

[0016] Furthermore, the fan is arranged at one end of the chamber far from the heat dissipation base, and the fan is fixedly arranged on the inner wall of the chamber. The fan makes the air in the chamber flow from top to bottom, maintaining the air circulation.

[0017] Furthermore, the heat dissipation base is a screw socket with an opening facing downward; an electrical path is formed between the heat dissipation base and the bulb. The screw socket design makes it easier to install and replace the bulb, which is convenient for users. At the same time, the downward-facing opening design also facilitates air circulation and heat dissipation.

[0018] Furthermore, the photocatalytic layer is fixedly arranged between the heat dissipation base and the side wall, surrounding the heat dissipation base, and the photocatalytic layer is arranged on the lower side of the flow guiding boss. The photocatalytic layer surrounding the heat dissipation base enables the air to fully contact the photocatalytic layer when flowing through the chamber, increasing the chance of pollutants being decomposed.

[0019] Furthermore, the lamp also includes a lampshade, which is fixedly arranged on the outer wall of the chamber.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] (1) In this application, a flow guiding boss is arranged on the side wall of the chamber, so that a swirling eddy current is formed under the side of the boss. The flow velocity of the air in the swirling eddy current is relatively large, and organic pollutants are easily adsorbed and desorbed. The formed swirling eddy current also prolongs the contact time between the organic pollutants and the photocatalyst, enabling the organic pollutants to fully interact with the photocatalyst and improving the photocatalytic efficiency.

[0022] (2) The flow of air takes away the heat of the heat dissipation base, effectively avoiding local temperature rise. At the same time, the air flowing through the heat dissipation base is heated by the heat dissipation base, increasing the kinetic energy of the pollutants, accelerating the molecular movement, and increasing the collision frequency with the photocatalyst, thereby improving the photocatalytic efficiency. Description of the Drawings

[0023] Figure 1 is a schematic diagram of a flow guiding chamber provided by the present utility model;

[0024] Figure 2 is the flow field simulation result of a flow guiding chamber provided by the present utility model;

[0025] Figure 3 is an appearance picture of a lamp provided by the present utility model.

[0026] Reference numerals: 1 - side wall; 2 - heat dissipation base; 3 - connecting rod; 4 - flow guiding boss; 5 - fan; 6 - ultraviolet lamp; 7 - photocatalytic layer. Detailed Embodiments

[0027] In order to make the implementation process of the present utility model clearer, the following will be described in detail with reference to the drawings.

[0028] The present utility model provides a flow guiding chamber, as shown in Figure 1As shown, the chamber includes a side wall 1. The upper end of the chamber is the air inlet end, and the lower end of the chamber is the air outlet end. The shape of the chamber is cylindrical, with both upper and lower ends open, or provided with a lid with ventilation holes to allow gas to pass through. The material of the side wall 1 can be metal, which can prevent the leakage of internal ultraviolet light and cause damage, and can also reflect ultraviolet light so that the ultraviolet light can fully irradiate the photocatalyst. The chamber also includes a heat dissipation base 2 and a flow guiding boss 4. The heat dissipation base 2 is a screw-type lamp holder with an opening facing downwards; the heat dissipation base 2 coincides with the central axis of the chamber. The heat dissipation base 2 is fixedly arranged in the chamber through a connecting rod 3. One end of the connecting rod 3 is connected to the heat dissipation base 2, and the other end of the connecting rod 3 is connected to the side wall 1. The material of the connecting rod 3 can be metal or plastic, mainly for connection. The number of the connecting rods 3 is not limited. Preferably, in order to reduce the influence of the connecting rod 3 on the air flow, the number of the connecting rods 3 is 2, and the two connecting rods 3 are symmetrically arranged so that the air flow is symmetrically distributed, so that the formed swirling eddy current is evenly distributed in different radial directions. The flow guiding boss 4 is arranged around the inner wall of the chamber opposite to the heat dissipation base 2. From the outside to the inside, the thickness of the flow guiding boss 4 gradually decreases. The thickness is the height of the flow guiding boss 4 in the up and down direction. There is a gap between the flow guiding boss 4 and the heat dissipation base 2. The material of the flow guiding boss 4 can be the same as that of the side wall 1. The upper surface of the flow guiding boss 4 is an inclined surface, with the end close to the side wall 1 higher than the end close to the heat dissipation base 2. The lower surface of the flow guiding boss 4 is a horizontal plane; the included angle between the upper surface and the lower surface is 30 - 60°. The width of the flow guiding boss 4 is greater than one-eighth of the chamber diameter and less than one-sixth of the chamber diameter; the outer diameter of the heat dissipation base 2 is less than two-thirds of the chamber diameter. The width of the flow guiding boss 4 is the length of the flow guiding boss 4 in the radial direction, that is, the distance between the end close to the side wall 1 and the end close to the heat dissipation base 2.

[0029] Use the "ansys fluent" software to simulate the flow field in the chamber. Figure 2 This is the flow field simulation result of the chamber of this application. The obstacle in the middle area represents the heat dissipation base 2. Different brightness levels in the figure represent different flow velocity magnitudes. The darker the color, the greater the gas flow velocity, and the lighter the color, the smaller the gas flow velocity. The direction of the arrow represents the air flow direction, and the sparsity of the arrows represents the degree of air aggregation. It can be seen that the color of the arrows is darker under the flow guiding boss 4, and a swirling eddy current is formed. It can also be seen that setting the flow guiding boss can guide the air to the heat source side, making the air contact the heat source more fully, thereby heating the air.

[0030] Furthermore, a vertically oriented groove is provided on the outer wall of the heat dissipation base 2. The cross-sectional shape of the groove is larger on the outside and smaller on the inside, and can be semi-circular or triangular. The groove increases the surface area of the heat dissipation base 2, thereby increasing the contact area with the flowing air, enhancing the heat dissipation effect, and the heating effect on the air. The shape that is larger on the outside and smaller on the inside can form an air guiding structure, enabling the air to flow along the groove when flowing over the heat dissipation base 2, reducing air stagnation, promoting the rapid flow of air, and enhancing the heat dissipation performance; at the same time, a certain contraction effect is generated inside the groove, and the speed of the air flowing through the groove will increase, causing the heat to be taken away faster, further improving the heat dissipation efficiency.

[0031] The present application also proposes a lamp, which includes a bulb, a fan 5, an ultraviolet lamp 6, a photocatalytic layer 7, and the above-mentioned chamber. The photocatalytic layer 7 is arranged on the lower side of the flow guiding boss 4 of the chamber, that is, the photocatalytic layer 7 is arranged in the area where the swirling eddy current is formed; the bulb is arranged on the heat dissipation base 2 of the chamber. The fan 5 is arranged at one end of the chamber far from the heat dissipation base 2, and the fan 5 is fixedly arranged on the inner wall of the chamber. The ultraviolet lamp 6 is fixedly arranged on the lower surface of the flow guiding boss 4, and the emission wavelength of the ultraviolet lamp 6 is 360 - 370 nm. The ultraviolet lamp 6 is arranged in a circle to fully irradiate the photocatalytic layer 7. The photocatalytic layer 7 is fixedly arranged between the heat dissipation base 2 and the side wall 1, surrounding the heat dissipation base 2, and the photocatalytic layer 7 is arranged on the lower side of the flow guiding boss 4. The photocatalytic layer 7 is a porous structure with a photocatalyst attached to the surface. The shape of the photocatalytic layer 7 is a circular column, the outer circle diameter is the inner diameter of the chamber, and the inner circle diameter is the outer diameter of the heat dissipation base 2. The photocatalytic layer 7 is a circular column and is in close contact with the inner wall of the chamber, effectively guiding the air flow through the entire photocatalytic layer 7, avoiding the air flow bypassing the catalytic area, and ensuring that the pollutants are in full contact with the photocatalyst. The material of the porous structure can be a heat insulating material, such as polystyrene foam, polyurethane foam, ceramic foam, etc. In this way, heat is not easily transmitted between the photocatalyst particles, avoiding the increase in the temperature of the photocatalyst particles. A higher temperature will cause the electron-hole pairs in the photocatalyst to recombine quickly, reducing the photocatalytic efficiency.

[0032] The lamp further includes a lampshade, and the lampshade is fixedly arranged on the outer wall of the chamber. The lampshade is fixedly arranged at the upper end of the side wall 1, and the edge of the lampshade is fixedly arranged on the outer wall of the chamber. From top to bottom, the diameter of the lampshade gradually increases, and the chamber and the bulb are covered by the lampshade; the appearance is as Figure 3 shown. The power cord is connected to the chamber to supply power to the lamp, and is connected to the heat dissipation base 2, and an electrical path is formed between the heat dissipation base 2 and the bulb. In the lamp, power needs to be supplied to the fan 5, the ultraviolet lamp 6, and the heat dissipation base 2. The inside of the heat dissipation base 2 is electrically connected to the bulb. The electrical appliances can be connected in series or in parallel, and the connection method is the prior art and will not be specifically limited.

[0033] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A diversion chamber, the chamber comprising side walls, an upper end of the chamber being an air inlet end, and a lower end of the chamber being an air outlet end, characterized in that, The chamber further includes a heat dissipation base and a flow guiding convex platform; the heat dissipation base is fixedly arranged in the chamber through a connecting rod, one end of the connecting rod is connected to the heat dissipation base, and the other end of the connecting rod is connected to the side wall; the flow guiding convex platform is arranged around the inner wall of the chamber opposite to the heat dissipation base, and from outside to inside, the thickness of the flow guiding convex platform gradually decreases, and there is a gap between the flow guiding convex platform and the heat dissipation base.

2. The flow guiding chamber according to claim 1, characterized in that, The upper surface of the flow guiding convex platform is an inclined surface, the end close to the side wall is higher than the end close to the heat dissipation base, and the lower surface of the flow guiding convex platform is a horizontal surface.

3. The flow guiding chamber according to claim 2, characterized in that, The included angle between the upper surface and the lower surface is 30 - 60°.

4. The flow guiding chamber according to claim 3, wherein The width of the flow guiding convex platform is greater than one-eighth of the diameter of the chamber and less than one-sixth of the diameter of the chamber.

5. A lighting fixture, comprising a light bulb, a fan, an ultraviolet lamp, and a photocatalytic layer, characterized in that, The lamp further includes the chamber according to any one of claims 1 - 4, the photocatalytic layer is arranged on the lower side of the flow guiding convex platform of the chamber; the bulb is arranged on the heat dissipation base of the chamber.

6. The luminaire according to claim 5, characterized in that, The photocatalytic layer is a porous structure with a photocatalyst attached to the surface.

7. The luminaire according to claim 6, characterized in that, The ultraviolet lamp is fixedly arranged on the lower surface of the flow guiding convex platform.

8. The luminaire according to claim 7, characterized in that, The fan is arranged at one end of the chamber away from the heat dissipation base and is fixedly arranged on the inner wall of the chamber.

9. The luminaire according to claim 8, characterized in that, The heat dissipation base is a screw socket lamp holder with an opening downward; an electrical path is formed between the heat dissipation base and the bulb.

10. The luminaire according to claim 9, characterized in that, The lamp further includes a lampshade, and the lampshade is fixedly arranged on the outer wall of the chamber.

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