Air inlet heating device for spray painting room

Abstract

The utility model discloses a kind of air inlet heating devices of spray paint room, it is related to spray paint equipment technical field.The device includes solar heating assembly and electric heating device, solar heating assembly is installed above electric heating device, its left end is connected with air inlet pipe, right end is connected with electric heating device by connecting pipe, the left side of electric heating device is provided with air outlet pipe.Air is sent into solar heating assembly by fan, in turn flows through metal heating pipe and heat conduction sheet and is preheated, then enters electric heating device by electric heating rod and fin and is secondary heated, finally is sent into spray paint room by air outlet pipe.The upper portion of device is equipped with rotatable baffle, the baffle is driven by speed reducer, can shield solar heating pipe in non-working state to prevent dry burning, while setting light shielding protection structure, improve system operation safety and service life, applicable to various spray paint room air inlet heating system.

Description

Technical Field

[0001] This utility model belongs to the technical field of heating devices, specifically relating to an air intake heating device for a paint spraying booth. Background Technology

[0002] A spray booth is a piece of equipment used for spraying and drying workpiece surfaces, and is widely used in automobile manufacturing, machining, furniture painting, and other fields. During the spraying and baking process, hot air at a certain temperature needs to be continuously supplied into the spray booth to ensure uniform drying of the coating and improve adhesion. Existing spray booths typically use electric or fuel-fired heating to heat the incoming air. While this meets heating requirements, it suffers from high energy consumption, high operating costs, and slow heating rates. Furthermore, relying solely on electric heating can lead to low energy efficiency and prevent the cascading utilization of thermal energy, especially in areas with solar radiation, where renewable energy sources are not fully utilized, resulting in resource waste.

[0003] Furthermore, in some paint spraying booths, multi-stage heating structures or preheated airflow methods are used to improve heating efficiency. However, most existing preheating structures rely on electric heating elements acting directly on the air, failing to achieve the synergistic utilization of natural energy and electric heating. When the equipment is not in operation, if the solar heat-absorbing components are continuously exposed to strong sunlight, the internal heat-conducting medium is prone to dry burning due to heat accumulation, which not only affects heating efficiency but may also damage the heating elements and shorten their service life. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this utility model is to provide a spray booth air intake heating device that can achieve solar-assisted preheating and has protective functions, thereby improving the thermal energy utilization rate and extending the service life of the equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A spray painting booth air intake heating device includes a solar heating component and an electric heating device. The solar heating component is fixed on the upper side of the electric heating device, and an air intake pipe connected to a fan is fixed on the left end of the solar heating component.

[0007] A connecting pipe for connecting to an electric heating device is fixed on the right side of the solar heating component, and an air outlet pipe for supplying hot air to the spray painting booth is fixed on the left end of the electric heating device.

[0008] A rotatable shield is installed on the rear side of the electric heating device. The shield blocks sunlight from the solar heating module, and the shield can be rotated to release the sunlight blocking from the solar heating module.

[0009] Furthermore, the solar heating component includes wind boxes on the left and right sides and several evenly arranged solar heating tubes disposed between the wind boxes on the left and right sides. The left and right ends of the solar heating tubes are respectively inserted into the wind boxes on the left and right sides, and the air inlet pipe and connecting pipe are respectively fixed to the wind boxes on the left and right sides.

[0010] Furthermore, both the front and rear ends of the air box are fixed with vertically downward locking plates, and locking screws are threaded onto the locking plates.

[0011] Furthermore, the solar heating tube includes a metal tube with several heat-conducting fins arranged uniformly in a circular pattern fixed on the inner wall of the metal tube, and a glass tube fitted on the outer side of the metal tube. A vacuum cavity is provided between the metal tube and the glass tube, and the outer surface of the metal tube is coated with a selective absorption coating.

[0012] Furthermore, the electric heating device includes a base, with a first hot air box and a second hot air box fixed on the upper surface of the base near the left and right ends respectively. The second hot air box blows air into the first hot air box. An electric heating component for heating by convection is arranged between the first hot air box and the second hot air box. The upper side of the base is fixedly covered with an outer shell, and an air outlet pipe passes through the outer shell and connects to the first hot air box. One end of the connecting pipe passes through the outer shell and connects to the second hot air box.

[0013] Furthermore, the electric heating assembly includes several fins arranged in a front-to-back manner and a cover covering the outside of the fins. The fins are fixedly connected by several heating tubes arranged in a left-to-right manner. Each heating tube contains an electric heating rod. Several air vents are opened on the opposite side of the first hot air box and the second hot air box.

[0014] Furthermore, two slots are provided on the front and back of the outer casing near the top, and a lock hole is provided on the bottom inner side of the slot.

[0015] Furthermore, a connecting plate is fixed to one end of the shield, and a rotating shaft is fixed to one end of the connecting plate. The rotating shaft is rotatably mounted on the outer casing via two left and right rotating brackets, and a reduction motor connected to the rotating shaft is fixed to one side of one of the rotating brackets.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] By installing a solar heating component above the electric heating device and using solar heating tubes to preheat the air, the air gains heat before entering the electric heating device, significantly reducing the power-on time and energy consumption of the electric heating rod. The solar heating tubes employ a vacuum combination structure of metal and glass tubes. The outer surface of the metal tubes is coated with a selective absorption coating, which efficiently absorbs solar radiation heat and transfers the heat to the flowing air through heat-conducting fins, achieving the synergistic utilization of natural energy and electrical energy. Compared to traditional structures that rely entirely on electric heating, this solution reduces energy loss, improves heating efficiency, and meets the practical needs of energy conservation and environmental protection.

[0018] By employing a tiered structure with dual hot air boxes and an electric heating element, the air is gradually heated as it flows between the first and second hot air boxes. Multiple sets of fins and heating tubes within the electric heating element work together to expand the heat exchange area and improve the uniformity of air heating, ensuring a stable and consistent temperature of the hot air delivered into the spray booth. This structure effectively overcomes the problems of concentrated heat and uneven heating in existing technologies, thereby improving the spraying and drying quality inside the spray booth.

[0019] By installing a rotatable shield at the rear of the electric heating device, and using a geared motor to drive it, shading control is achieved. This automatically shields the solar heating components when the system stops operating, effectively preventing the solar absorber tubes from dry burning and thermal fatigue due to continuous exposure to sunlight. This design not only improves the safety of the solar heating components but also extends their service life, ensuring long-term stable operation of the system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the solar heating component of this utility model;

[0022] Figure 3 This is a schematic diagram of the solar heating tube of this utility model;

[0023] Figure 4 This is a schematic diagram of the electric heating device of this utility model;

[0024] Figure 5 This is a schematic diagram of the electric heating component of this utility model;

[0025] Figure 6 This is a schematic diagram of the outer casing of this utility model;

[0026] Figure 7 This is a schematic diagram of the shielding plate of this utility model.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] 1. Baffle plate; 11. Rotating shaft; 12. Rotating bracket; 13. Gear motor; 14. Connecting plate; 2. Solar heating component; 21. Air box; 22. Solar heating tube; 221. Glass tube; 222. Metal tube; 223. Heat-conducting plate; 23. Locking plate; 24. Locking screw; 3. Air inlet pipe; 4. Air outlet pipe; 5. Electric heating device; 51. Outer shell; 511. Slot; 512. Lock hole; 52. First hot air box; 53. Base; 54. Electric heating component; 541. Cover; 542. Fins; 543. Heating tube; 544. Electric heating rod; 55. Second hot air box; 6. Connecting pipe. Detailed Implementation

[0029] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0030] like Figure 1 As shown, a spray booth air intake heating device includes a solar heating component 2 and an electric heating device 5. The solar heating component 2 is fixed on the upper side of the electric heating device 5, and an air intake pipe 3 connected to a fan is fixed on the left end of the solar heating component 2.

[0031] Most existing paint spraying booths directly use electric heating when delivering hot air, which results in high energy consumption, low energy utilization, and slow heating response, which is not conducive to energy saving and stable operation.

[0032] To overcome the above problems, a solar heating component 2 is set up to preheat the air with solar energy before it enters the electric heating device 5, thereby reducing the electric heating load by making full use of natural heat sources.

[0033] The right side of the solar heating component 2 is fixed with a connecting pipe 6 that is connected to the electric heating device 5, and the left end of the electric heating device 5 is fixed with an air outlet pipe 4 that supplies hot air to the spray booth. The air is heated throughout the entire process from the outside to the inside of the spray booth by the sequential connection of the air inlet pipe 3, the connecting pipe 6 and the air outlet pipe 4.

[0034] A rotatable shield 1 is installed on the rear side of the electric heating device 5. The shield 1 blocks sunlight from the solar heating component 2, and the shield 1 can be rotated to release the sunlight blocking on the solar heating component 2. This prevents the solar heating component 2 from dry burning when not heating, extends the service life of the heating system, and ensures long-term stable operation of the equipment.

[0035] like Figure 2As shown, the solar heating component 2 includes wind boxes 21 on the left and right sides and a number of solar heating tubes 22 arranged evenly between the wind boxes 21 on the left and right sides. The left and right ends of the solar heating tubes 22 are respectively inserted into the wind boxes 21 on the left and right sides. The air inlet pipe 3 and the connecting pipe 6 are respectively fixed to the wind boxes 21 on the left and right sides.

[0036] Existing air preheating structures suffer from uneven airflow and uneven heating, leading to localized overheating or large temperature gradients, which is not conducive to balanced heat flow within the paint spraying booth.

[0037] To this end, symmetrical wind boxes 21 are set up to distribute airflow evenly, so that air passes through multiple solar heating tubes 22 to form parallel channels, ensuring that the airflow in each heating tube 22 is consistent.

[0038] Each air box 21 has an air guiding cavity inside, which is used to distribute the airflow to several heating tubes 22 when the air is delivered by the air inlet pipe 3. After absorbing heat, the air is then transported to the electric heating device 5 through the connecting pipe 6, so as to realize the graded heating and stable flow of the air.

[0039] This structure not only ensures a balance between airflow and heat exchange, but also facilitates disassembly and maintenance through modular arrangement, thereby improving the overall thermal efficiency and reliability of operation.

[0040] like Figure 2 As shown, both the front and rear ends of the air box 21 are fixed with vertically downward locking plates 23, and locking screws 24 are threaded on the locking plates 23.

[0041] Existing solar heating devices suffer from problems such as unstable installation of heating tubes and loosening due to vibration during operation, which can easily lead to widening of sealing gaps and serious air and heat leakage.

[0042] The locking plate 23 and locking screw 24 are used to rigidly fix the overall structure at both ends of the air box 21. The locking screw 24 passes through the locking plate 23 and is pressed on the outside of the air box 21, so that the air box 21 can be stably installed on the support structure.

[0043] This structure effectively prevents loosening caused by thermal expansion and contraction after long-term operation, ensuring that the solar heating component 2 remains sealed and stable during heat absorption and transfer, thereby improving heat transfer efficiency and extending the overall lifespan of the equipment.

[0044] like Figure 3 As shown, the solar heating tube 22 includes a metal tube 222, which is an aluminum tube, a stainless steel tube, or a copper tube. Several heat-conducting fins 223 are fixed on the inner wall of the metal tube 222 in a uniformly arranged circular shape, and a glass tube 221 is fitted on the outer side of the metal tube 222. A vacuum cavity is provided between the metal tube 222 and the glass tube 221, and the outer surface of the metal tube 222 is coated with a selective absorption coating.

[0045] Existing heating tube structures often suffer from low air heating efficiency due to limited heat conduction area or low external convection coefficient, while external heat loss is severe and solar energy utilization is insufficient.

[0046] By using the metal tube 222 as the main heat absorber and coating its outer surface with a selective absorption coating, high efficiency absorption of solar radiation and low radiation loss can be achieved.

[0047] The metal tube 222 has an annular heat-conducting fin 223 inside to increase the contact area with air and improve the uniformity of air heating;

[0048] The outer glass tube 221 forms a sealed vacuum chamber, which effectively reduces heat convection loss and environmental heat dissipation, allowing solar thermal energy to be concentrated and transferred to the air flowing through the metal tube 222, thus achieving initial heating of the air.

[0049] The application of this structure significantly reduces energy consumption in the subsequent electric heating stage, enabling efficient and synergistic utilization of renewable energy.

[0050] like Figure 4 As shown, the electric heating device 5 includes a base 53. A first hot air box 52 and a second hot air box 55 are fixed on the upper surface of the base 53 near the left and right ends, respectively. The second hot air box 55 blows air into the first hot air box 52. An electric heating component 54 for heating by convection is arranged between the first hot air box 52 and the second hot air box 55. An outer shell 51 is fixedly covered on the upper side of the base 53. An air outlet pipe 4 passes through the outer shell 51 and is connected to the first hot air box 52. One end of the connecting pipe 6 passes through the outer shell 51 and is connected to the second hot air box 55.

[0051] Existing spray booth air intake heating devices often suffer from problems such as a single airflow path and insufficient heat exchange during the electric heating process, resulting in uneven heat distribution and affecting the uniformity of spraying and energy utilization.

[0052] By arranging a double hot air box structure on the base 53, the second hot air box 55 serves as an air inlet preheating chamber. Air enters the second hot air box 55 from the solar heating component 2 through the connecting pipe 6, is further heated by the electric heating component 54, and is blown into the first hot air box 52, and then transported to the spray painting booth through the air outlet pipe 4.

[0053] The first hot air box 52 and the second hot air box 55 are sealed to ensure stable airflow and efficient heat transfer.

[0054] The outer casing 51 provides protection and insulation for the entire system, reducing heat loss and preventing external dust intrusion, thus ensuring long-term stable operation of the system.

[0055] like Figure 5As shown, the electric heating assembly 54 includes several fins 542 arranged in a front-to-back manner and a cover 541 covering the outside of the fins 542. The several fins 542 are fixedly connected by several heating tubes 543 arranged in a left-to-right manner. Each of the heating tubes 543 is equipped with an electric heating rod 544. Several air vents are opened on the opposite side of the first hot air box 52 and the second hot air box 55.

[0056] Existing electric heating structures generally suffer from high airflow resistance and low heat transfer efficiency, which can easily cause localized overheating or uneven heating of the air.

[0057] By setting multiple rows of fins 542, the contact area between air and the heating surface is increased, and heating tubes 543 are evenly arranged between the fins 542 to form a multi-point heating channel.

[0058] An electric heating rod 544 is installed inside the heating tube 543 as the core heat source. Heat is conducted through the outer wall of the heating tube 543 and the fins 542 to achieve rapid and uniform heating of the air.

[0059] The casing 541 encloses the entire heating zone to form a stable flow channel, prevent heat loss, and improve heat exchange efficiency.

[0060] The air vents are evenly distributed on the opposite side walls of the hot air box, so that the air can fully contact the fins 542 during the flow process, thereby achieving the effect of efficient heat transfer and stable air supply.

[0061] The heating component has a compact and reasonable structure, which ensures heating efficiency while reducing equipment maintenance costs.

[0062] like Figure 6 As shown, two slots 511 are provided on the front and back near the upper part of the outer casing 51, and a lock hole 512 is provided on the bottom inner side of the slot 511.

[0063] The existing heating device for spray painting booths has an inconvenient outer shell structure that is difficult to disassemble and reassemble during installation and maintenance, and its sealing is insufficient, which can easily lead to air leakage and increased energy consumption.

[0064] By providing a slot 511 and a lock hole 512 on the outer casing 51, quick disassembly and secure locking can be achieved during installation or maintenance.

[0065] The lock hole 512 is used in conjunction with the corresponding locking mechanism to ensure that the housing 51 remains in a tight fit during operation, effectively preventing air leakage and heat loss;

[0066] Meanwhile, the slot 511 can serve as a guide and positioning structure for external maintenance components, improving assembly accuracy and airtightness, and ensuring that the heating device maintains stable thermal performance during long-term operation.

[0067] like Figure 7As shown, a connecting plate 14 is fixed to one end of the shielding plate 1, and a rotating shaft 11 is fixed to one end of the connecting plate 14. The rotating shaft 11 is rotatably mounted on the outer shell 51 through two left and right rotating brackets 12. A reduction motor 13 connected to the rotating shaft 11 is fixed to one side of one of the rotating brackets 12.

[0068] Existing solar heat absorption tubes are prone to localized overheating and dry burning if they are continuously exposed to sunlight after the air supply is stopped, which can damage the heat absorption coating and affect heating efficiency.

[0069] The rotation of the shielding plate 1 enables dynamic shading control of the solar heating component 2. The geared motor 13 drives the rotating shaft 11 to rotate the connecting plate 14 and the shielding plate 1. When the system is detected to be in a non-heating state, the shielding plate 1 automatically covers the top of the solar heating component 2, thereby blocking sunlight.

[0070] When the system re-enters the working state, the geared motor 13 rotates in reverse to drive the shielding plate 1 to reset and re-expose the heat absorption area, ensuring that the solar heating component 2 absorbs heat efficiently.

[0071] The rotating bracket 12 provides stable support when the shield 1 rotates, making the entire shading action smooth and reliable.

[0072] This structure effectively prevents the solar heating component 2 from overheating and failing due to prolonged exposure to sunlight, further improving system safety and service life.

[0073] The working principle of this utility model is as follows: When hot air is supplied to the spray booth, the fan is started to send air into the air inlet pipe 3 and into the air box 21 on the left. The air box 21 on the left then sends the air through several metal pipes 222 into the air box 21 on the right. At this time, the metal pipes 222 absorb solar heat through a selective absorption coating and transfer it to the flowing air through the heat-conducting plate 223, thereby completing the initial heating of the air. The initially heated air then enters the second hot air box 55 through the connecting pipe 6. The second hot air box 55 then sends the air through the gaps between the fins 542 to the first hot air box 52. At this time, the electric heating rod 544 heats the heating tube 543 and heats the flowing air through the fins 542. After heating, the air is finally sent into the spray booth through the air outlet pipe 4, thereby completing the heating of the air supply to the spray booth. Using solar energy to initially heat the air can reduce the time and energy loss of electric heating, which not only meets the requirements of energy saving but also improves the efficiency of hot air supply.

[0074] When hot air is not required, the geared motor 13 can be controlled to drive the rotating shaft 11 to rotate the connecting plate 14 and the shielding plate 1 until the shielding plate 1 rotates to the upper side of the solar heating tube 22 to block the sunlight, thereby effectively preventing the solar heating tube 22 from dry burning and extending the service life of the solar heating component 2.

[0075] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A heating device for the air intake of a spray painting booth, characterized in that: It includes a solar heating component (2) and an electric heating device (5). The solar heating component (2) is fixed on the upper side of the electric heating device (5), and the left end of the solar heating component (2) is fixed with an air inlet pipe (3) connected to a fan. The solar heating component (2) is fixed with a connecting pipe (6) connected to the electric heating device (5) on the right side, and the electric heating device (5) is fixed with an air outlet pipe (4) for supplying hot air to the spray painting booth on the left side. A rotatable shielding plate (1) is installed on the rear side of the electric heating device (5). The shielding plate (1) blocks sunlight from the solar heating component (2), and the shielding plate (1) can release the sunlight blocking of the solar heating component (2) by rotating.

2. The air inlet heating device for a spray painting booth according to claim 1, characterized in that: The solar heating component (2) includes wind boxes (21) on the left and right sides and a number of solar heating tubes (22) arranged evenly between the wind boxes (21) on the left and right sides. The left and right ends of the solar heating tubes (22) are respectively inserted into the wind boxes (21) on the left and right sides. The air inlet pipe (3) and the connecting pipe (6) are respectively fixed on the wind boxes (21) on the left and right sides.

3. The air inlet heating device for a spray painting booth according to claim 2, characterized in that: Both ends of the air box (21) are fixed with vertically downward locking plates (23), and locking screws (24) are threaded on the locking plates (23).

4. The air inlet heating device for a spray painting booth according to claim 2, characterized in that: The solar heating tube (22) includes a metal tube (222), a number of heat-conducting plates (223) arranged in a uniform circular pattern are fixed on the inner wall of the metal tube (222), and a glass tube (221) is fitted on the outer side of the metal tube (222). A vacuum cavity is provided between the metal tube (222) and the glass tube (221), and the outer surface of the metal tube (222) is coated with a selective absorption coating.

5. The air inlet heating device for a spray painting booth according to claim 3, characterized in that: The electric heating device (5) includes a base (53). A first hot air box (52) and a second hot air box (55) are fixed on the upper surface of the base (53) near the left and right ends, respectively. The second hot air box (55) blows air to the first hot air box (52). An electric heating component (54) for heating by convection is provided between the first hot air box (52) and the second hot air box (55). An outer shell (51) is fixedly covered on the upper side of the base (53). The air outlet pipe (4) passes through the outer shell (51) and is connected to the first hot air box (52). One end of the connecting pipe (6) passes through the outer shell (51) and is connected to the second hot air box (55).

6. The air inlet heating device for a spray painting booth according to claim 5, characterized in that: The electric heating assembly (54) includes several fins (542) arranged in a front-to-back manner and a cover (541) covering the outside of the fins (542). The several fins (542) are fixedly connected by several heating tubes (543) arranged in a left-to-right manner. Each of the several heating tubes (543) is equipped with an electric heating rod (544). Several air vents are opened on the opposite side of the first hot air box (52) and the second hot air box (55).

7. The air inlet heating device for a spray painting booth according to claim 5, characterized in that: The outer casing (51) has two slots (511) on the front and back near the upper end, and a lock hole (512) is provided on the bottom inner side of the slot (511).

8. The air inlet heating device for a spray painting booth according to claim 5, characterized in that: One end of the shield (1) is fixed with a connecting plate (14), and one end of the connecting plate (14) is fixed with a rotating shaft (11). The rotating shaft (11) is rotatably mounted on the outer shell (51) via two left and right rotating brackets (12). One side of one of the rotating brackets (12) is fixed with a reduction motor (13) connected to the rotating shaft (11).

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