Special explosion-proof air conditioner indoor unit used in high-temperature dust environment

Abstract

The application relates to a special explosion-proof air conditioner, in particular to a special explosion-proof air conditioner indoor unit used in a high-temperature dust environment. A first filtering device comprises a water storage filter body, the water storage filter body is connected to a water source, dust is filtered through the water storage filter body, dust reduction is achieved, the water storage filter body is connected with a water drainage device one, dust is removed in the water drainage process, the purpose of cleaning the water storage filter body is achieved, dust is filtered through the water storage filter body, water quantity can be controlled while the dust reduction effect is ensured, subsequent dehumidification is facilitated, a second filtering device comprises a water absorption filter body, the water absorption filter body is connected with a water drainage device two, the rotating seat rotates to alternately shield the inner ends of two air inlet tubes, two air inlet tubes are made to work in turns through a switching device, one air inlet tube works while the other air inlet tube is cleaned, the two air inlet tubes are used alternately, and the purpose of continuous use is achieved.

Description

Technical Field

[0001] This invention relates to special explosion-proof air conditioners, and more particularly to special explosion-proof air conditioner indoor units used in high-temperature dust environments. Background Technology

[0002] Special explosion-proof air conditioners refer to explosion-proof air conditioners used in special environments. They are generally special high-temperature air conditioners that operate in high-temperature environments. The materials used are carefully selected to ensure high-temperature resistance and stability.

[0003] Dust is also a common operating environment for special explosion-proof air conditioners. During use, special explosion-proof air conditioners typically have filters installed at the air inlet or outlet to filter the air, thereby removing dust and allowing fresh air to enter. Filter devices usually use filter cotton. For environments with high dust content, spray washing or water curtains are also used to remove dust from the air, which can effectively reduce dust. For special explosion-proof air conditioners, high dust and high humidity environments can cause damage to the evaporator. Therefore, a filter device that can reduce dust and dehumidify the air entering the evaporator is needed to meet the usage requirements of the indoor unit of special explosion-proof air conditioners in high-temperature and dusty environments and extend its service life. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a filtration device that can reduce dust and dehumidify the air intake of the evaporator, thereby meeting the usage requirements of special explosion-proof air conditioner indoor units in high-temperature dust environments and improving the service life of special explosion-proof air conditioner indoor units used in high-temperature dust environments.

[0005] This invention is achieved through the following technical solution: a special explosion-proof air conditioner indoor unit for use in high-temperature dust environments, comprising an explosion-proof housing, an evaporator disposed within the explosion-proof housing, an air outlet disposed on the explosion-proof housing, an air inlet disposed at the lower end of the explosion-proof housing, two air inlets disposed at the lower end of the explosion-proof housing, an air inlet duct disposed at each air inlet, and a primary filter and a secondary filter disposed sequentially from the outside to the inside of the air inlet duct. The primary filtration device includes a water storage filter body, which is connected to a water source and is also connected to a drainage device. The secondary filtration device includes a water-absorbing filter body, which is connected to a drainage device. A switching device is provided between the two air inlets. The switching device includes a rotating seat, which is connected to a rotation drive device. A baffle is provided on the rotating seat, which is configured to alternately block the inner ends of the two air inlets during the rotation of the rotating seat.

[0006] Furthermore, the water storage filter body includes a support cylinder, a low-density sponge is provided inside the support cylinder, a water distribution pipe is provided on the support cylinder and connected to a water source, a blocking net is provided at the outer end of the support cylinder, and the drainage device includes a push plate provided at the inner end of the support cylinder and a push rod connected to the push plate. The drainage device two includes a push plate two disposed on the outside of the water-absorbing filter body, the push plate two being connected to a push rod one. A push plate three is disposed on the inside of the water-absorbing filter body, the push plate three being connected to a push rod two. The push rod two is connected to a rotating seat, and the rotating seat can alternately drive the two push rod two to move during rotation. Push plate one, push plate two, and push plate three are all perforated plates.

[0007] Furthermore, a drainage chamber is provided on the lower side of the air inlet duct, and an opening that cooperates with the support cylinder is provided on the upper side of the drainage chamber. A drainage hole is provided on the lower wall of the support cylinder, and the drainage chamber is connected to a water inlet pipe and a sewage outlet pipe.

[0008] Furthermore, the second drainage device also includes a heating device disposed inside the water absorption filter layer. The heating device includes a heating coil, which is connected to the air outlet of the condenser. The inner end of the air inlet duct is provided with a water-draining air inlet, and the outer end of the air inlet duct is provided with a water-draining air outlet. The water-draining air inlet and the water-draining air outlet are connected to the outside.

[0009] Furthermore, the driving device includes an explosion-proof motor housing connected to the explosion-proof housing, a drive motor is installed inside the explosion-proof motor housing, the drive motor is connected to a reducer, the rotating seat is connected to a drive shaft, the drive shaft is connected to the output shaft of the reducer, the baffle is an arc-shaped plate, the arc angle of the arc-shaped plate is 160°-200°, the inner side of the arc-shaped plate is connected to the connecting seat through a support rod, the outer side of the arc-shaped plate is provided with an arc-shaped rack, the arc angle of the arc-shaped rack is 45°-90°, two air inlets are symmetrically arranged on both sides of the explosion-proof housing, the inner end of the air inlets is provided with a transverse drive disc, the drive disc is provided with an eccentric shaft that cooperates with the push rod, and the drive disc is connected with a driven gear that cooperates with the arc-shaped rack.

[0010] Furthermore, the air inlet duct is provided with an insertion port that mates with the support cylinder, and the support cylinder is detachably inserted into the insertion port.

[0011] Furthermore, the air inlet duct is provided with a support rail for supporting push plate two and push plate three.

[0012] The beneficial effects of this invention are as follows: The special explosion-proof air conditioner indoor unit used in high-temperature dust environments has two air inlets at the lower end of the explosion-proof casing. Each air inlet is equipped with an air inlet duct. Inside the air inlet duct, from the outside in, are a primary filtration device and a secondary filtration device. The primary filtration device includes a water-storing filter body connected to a water source. The water-storing filter body filters dust, achieving dust reduction. The water-storing filter body is connected to a drainage device, which removes dust during drainage, thus cleaning the water-storing filter body. By filtering dust through the water-storing filter body, the water volume can be controlled while ensuring dust reduction, facilitating subsequent dehumidification. The secondary filtration device includes a water-absorbing filter body... The water-absorbing filter is connected to a second drainage device. The water-absorbing filter dehumidifies the incoming air, allowing the low-humidity, low-dust-content airflow to pass through the evaporator coil for heat exchange, protecting the evaporator coil and the inner cavity of the explosion-proof housing. The second drainage device drains water from the water-absorbing filter, ensuring long-term dehumidification. A switching device is provided between the two air inlets. The switching device includes a rotating seat connected to a rotation drive device. A baffle is provided on the rotating seat, which alternately blocks the inner ends of the two air inlets during rotation. The switching device allows the two air inlets to work alternately, cleaning the other air inlet while one air inlet is working, achieving continuous use through alternating use. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 This is a schematic diagram showing the arrangement of filter device one and filter device two in Example 1; Figure 3 This is a schematic front view sectional view of the filtration device; Figure 4 This is a schematic diagram of the main sectional view of the second filter device; Figure 5 This is a schematic diagram of the switching device structure; Figure 6 This is a top view of the switching device; Figure 7 This is a schematic diagram of the transmission relationship of the switching device; Figure 8 This is a schematic diagram of the main sectional view of the air inlet duct; Figure 9 This is a schematic diagram of the cross-section of the air inlet duct.

[0014] The components include: 1. Explosion-proof housing; 2. Display; 3. Control button; 4. Air outlet; 5. Air inlet tube; 6. Support plate; 7. Handle; 8. Drive motor one; 9. Grille plate; 10. Air inlet valve; 11. Support tube; 12. Push plate three; 13. Push plate two; 14. Water absorption filter; 15. Push rod two; 16. Drive disc; 17. Rotating seat; 18. Reducer; 19. Water distribution pipe; 20. Water storage filter; 21. Barrier net; 22. Drainage chamber; 23. Push plate one; 24. Push rod one; 25. Return spring; 26. Support rail; 27. Eccentric shaft; 28. Arc plate; 29. ​​Support rod; 30. Arc rack; 31. Transition gear; 32. Driven gear; 34. Water inlet pipe; 35. Sewage pipe; 36. Water outlet; 37. Hot air inlet; 38. Water outlet. Detailed Implementation

[0015] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1 like Figure 1-9 As shown, a special explosion-proof air conditioner indoor unit for use in high-temperature dust environments includes an explosion-proof housing 1, an evaporator installed inside the explosion-proof housing, an air outlet 4, a display 2, and control buttons 3 installed on the explosion-proof housing, and an air inlet machined at the lower end of the explosion-proof housing. In this embodiment, two air inlets are symmetrically machined at the lower end of the explosion-proof housing, and an air inlet duct 5 is installed at each air inlet via a flange. The air inlet duct is a sheet metal part with good corrosion resistance and deformation resistance. A primary filter and a secondary filter are installed sequentially from the outside to the inside of the air inlet duct.

[0018] The primary filtration device includes a water-storing filter body connected to a water source and a drainage device. Specifically, the water-storing filter body includes a horizontal support cylinder 11, which is formed by bending a stainless steel perforated plate. An insertion port for the support cylinder is machined on the air inlet duct, and the support cylinder is detachably inserted into the insertion port. A support plate 6 is installed at the upper end of the support cylinder, allowing the support cylinder to be mounted at the insertion port. A handle 7 is installed on the support cylinder for easy operation. A water distribution pipe 19 is also installed on the support plate, connected to the outer end of the support cylinder via a manifold. The water distribution pipe is connected to a water source via a quick connector to replenish water to the water-storing filter body 20. The support cylinder is filled with low-density sponge to store water, thus achieving the purpose of filtering dust. A baffle net 21 is fixed to the outer end of the support cylinder. The drainage device includes components arranged in… Push plate 23 is located on the inner end of the support cylinder. Push plate 23 is a perforated plate. Under normal conditions, push plate 23 is 5-6mm away from the support cylinder, which can avoid interference during the assembly and disassembly of the support cylinder. Push plate 23 is connected to push rod 24. Push rod 24 can drive push plate 23 to reciprocate within the support cylinder. Push rod 24 also supports push plate 23, making push plate 23 suspended, so that push plate 23 can move within the support cylinder. Return spring 25 is also installed between push plate 23 and air inlet cylinder to return push plate 23 to its original position. Drainage device 23 also includes a drainage chamber 22 sealed and connected to the lower side of air inlet cylinder. The upper side of drainage chamber is machined with an opening that matches the support cylinder. The lower wall of support cylinder is machined with drainage holes. In this embodiment, support cylinder is made of perforated plate. The holes in perforated plate form drainage holes. Drainage chamber is connected to water inlet pipe 34 and sewage outlet pipe 35 to flush drainage chamber and prevent siltation.

[0019] The secondary filtration device includes a water-absorbing filter body 14, which is connected to a drainage device 2. Specifically, the water-absorbing filter body is made of high-density sponge. The drainage device 2 includes a push plate 2 13 installed on the outside of the water-absorbing filter body, which is fixedly connected to a push rod 1. A push plate 3 12 is installed on the inside of the water-absorbing filter body, which is hinged to a push rod 2 15. Both push plates 2 and 3 are perforated plates. The push rod 2 can push the push plate 3 to reciprocate, thereby squeezing the high-density sponge to dehydrate it. A support rail 26 is installed inside the air inlet duct to support push plates 2 and 3, thereby facilitating the operation of the push plates 2 and 3. The guide plate three ensures the stable movement of push plate two and push plate three. The drainage device two also includes a heating device installed inside the water absorption filter layer. In this application, the heating device includes a heating coil, which is installed at the hot air inlet 37. Push rod two passes through the heating coil inward, and a transverse channel is reserved at the heating coil to avoid interfering with the horizontal swing of push rod two. The heating coil is connected to the air outlet of the condenser. The inner end of the air inlet duct is machined with a water inlet 36, and the outer end of the air inlet duct is machined with a water outlet 37. Both the water inlet and the water outlet are connected to the outside through pipelines.

[0020] A switching device is installed between the two air inlet ducts. The switching device includes a rotating base 17, which is connected to a rotary drive device. A baffle is installed on the rotating base, configured to alternately block the inner ends of the two air inlet ducts during the rotation of the rotating base. Specifically, the drive device includes an explosion-proof motor box connected to an explosion-proof housing, in which a drive motor is installed. The drive motor is connected to a reducer 18, and the rotating base is connected to a drive shaft. The drive shaft is connected to the output shaft of the reducer. The baffle is an arc-shaped plate 28, with an arc angle of 160°-200°, thus ensuring that air can enter the evaporator at any time. An arc-shaped opening that matches the arc-shaped plate is installed at the inner end of the air inlet duct. An opening is machined on the arc-shaped opening to cooperate with the arc-shaped rack. The inner side of the arc-shaped plate is connected to the connecting seat through the support rod 29. An arc-shaped rack 30 is fixed on the outer side of the arc-shaped plate. The arc angle occupied by the arc-shaped rack is 45°-90°. In this embodiment, the arc-shaped rack is located on the front side of the rotation direction of the arc-shaped plate, thereby driving the push rod 2 to move in the initial stage. A transverse drive disk 16 is installed at the inner end of the air inlet. An eccentric shaft 27 that cooperates with the push rod 2 is installed on the drive disk. The drive disk is connected to a driven gear 32 that cooperates with the arc-shaped rack. In order to control the stroke of the push rod 2, the driven gear meshes with the arc-shaped rack through the transition gear 31. During the rotation of the moving seat, the two push rods 2 can be driven alternately.

[0021] An air inlet valve 10 is installed at the outer end of the air inlet duct. The air inlet valve is connected to a drive motor 8. A grille 9 is installed at the outermost end of the air inlet duct.

[0022] The special explosion-proof air conditioner indoor unit for use in high-temperature and dusty environments obtained in this embodiment works on the following principle: In the initial state, one air inlet duct is blocked by a baffle (denoted as the blocked air inlet duct), and the other is designated as the open air inlet duct. Water is stored at the outer ends of two low-density sponges. When the air conditioner is turned on, high-temperature, high-dust air enters through the open air inlet duct. The airflow passes through the low-density sponges, where water is stored at the outer ends, providing a good initial dust removal effect. The water moves inward under the action of the airflow, further removing dust in conjunction with the low-density sponges. A small amount of water is replenished through the water distribution pipe, and the unit continues to be used. However, dust accumulates inside the low-density sponges, reducing the dust removal effect, and the outflowing airflow contains moisture. According to the design... A set switching time is established. Upon reaching the switching time, the drive motor activates, causing the rotating seat to rotate. The rotating seat then rotates the arc-shaped plate, moving it from the blocked air inlet duct to the open air inlet duct. After rotating to the open air inlet duct, the arc-shaped rack drives the driven gear to rotate. The driven gear drives the drive disc to rotate. The drive disc pushes the push plate three through push rod two to compress the high-density sponge and transmits force to push plate two. Push plate two then pushes push plate one through push rod one to compress the low-density sponge. Because the high-density sponge has a higher density, under the same force, the low-density sponge is compressed more, thus squeezing out the mud and water from the low-density sponge. During this process, water is replenished through the water distribution pipe for washing. This is achieved through the design of the arc-shaped rack, transition gear, and driven gear. The number of teeth ensures that the drive disc rotates 4-6 times per cycle, compressing the high-density and low-density sponges 4-6 times to improve the removal of mud and water. The position of the arc-shaped rack is controlled by the rotation angle or detected. Once the arc-shaped rack disengages from the driven gear, the drive motor stops, the air inlet valve of the air inlet duct closes, the water distribution pipe stops replenishing water, and the sponges are heated by the heating coil. Outdoor air is then introduced through the dewatering air inlet and discharged through the dewatering air outlet, drying the high-density and low-density sponges. To improve efficiency, the heating coil has air outlets, and the ratio of hot air to outdoor air is controlled by valves to achieve the drying purpose, while simultaneously controlling the temperature of the high-density and low-density sponges. A negative pressure fan is installed at the water outlet. The negative pressure forces air into the water inlet and heating coil. The mud and water squeezed out by the low-density sponge enter the drainage chamber and are discharged through the drain pipe. During the drainage process, water is introduced through the water inlet pipe to flush the drainage chamber. After a predetermined time, the negative pressure fan is turned off, the air inlet valve is opened, and water is added through the water distribution pipe. The process stops after the predetermined amount of water is added. During this process, the air inlet duct is blocked from working. After the switching time is reached, the drive motor is activated to cycle the process. The two air inlets are operated alternately by a switching device. While one air inlet is working, the other air inlet is cleaned. This alternating use ensures continuous operation and guarantees that the air entering the evaporator is dry and has a low dust content.

[0023] It is worth noting that, under normal circumstances, by controlling the switching time, it is possible to control the amount of dust carried by the airflow entering the high-density sponge, while the moisture content will be higher in the later stage. The high-density sponge is mainly used for water removal and secondary filtration of dust caused by design deviations and the lifespan of low-density sponges.

[0024] After a period of use, remove the support cylinder by the handle and replace the low-density sponge. During major repairs, replace or maintain the high-density sponge.

[0025] The special explosion-proof air conditioner indoor unit for use in high-temperature dust environments provided in this embodiment has a poorly sealed air inlet duct, but testing shows that this does not affect its performance.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A special explosion-proof air conditioner indoor unit for use in high-temperature dust environments, comprising an explosion-proof housing, an evaporator disposed within the explosion-proof housing, an air outlet disposed on the explosion-proof housing, and an air inlet disposed at the lower end of the explosion-proof housing, characterized in that, The explosion-proof housing has two air inlets at its lower end, and each air inlet is equipped with an air intake duct. Inside the air intake duct, from the outside in, are a primary filter and a secondary filter. The primary filtration device includes a water storage filter body, which is connected to a water source and is also connected to a drainage device. The secondary filtration device includes a water-absorbing filter body, which is connected to a drainage device. A switching device is provided between the two air inlets. The switching device includes a rotating base connected to a rotation drive device. A baffle is provided on the rotating base, configured to alternately block the inner ends of the two air inlets during the rotation of the rotating base. The water storage filter body includes a support cylinder, a low-density sponge is provided inside the support cylinder, a water distribution pipe is provided on the support cylinder and connected to a water source, a blocking net is provided at the outer end of the support cylinder, and the drainage device includes a push plate provided at the inner end of the support cylinder and a push rod connected to the push plate. The drainage device two includes a push plate two disposed on the outside of the water-absorbing filter body, the push plate two being connected to a push rod one. A push plate three is disposed on the inside of the water-absorbing filter body, the push plate three being connected to a push rod two. The push rod two is connected to a rotating seat, and the rotating seat can alternately drive the two push rod two to move during rotation. Push plate one, push plate two, and push plate three are all perforated plates. A drainage chamber is provided on the lower side of the air inlet duct, and an opening that mates with the support cylinder is provided on the upper side of the drainage chamber. A drainage hole is provided on the lower wall of the support cylinder, and the drainage chamber is connected to a water inlet pipe and a sewage outlet pipe. The second drainage device also includes a heating device disposed inside the water absorption filter layer. The heating device includes a heating coil, which is connected to the air outlet of the condenser. A water-discharge air inlet is provided at the inner end of the air inlet duct, and a water-discharge air outlet is provided at the outer end of the air inlet duct. The water-discharge air inlet and the water-discharge air outlet are connected to the outside. The water-absorbing filter element is made of high-density sponge. In operation, one of the air inlets is blocked by a baffle (labeled as the blocked air inlet), and the other is left open. Water is stored at the outer ends of two low-density sponges. When the air conditioner is turned on, high-temperature, high-dust airflow enters through the open air inlet. The airflow passes over the low-density sponges, where water is stored at the outer ends for initial dust removal. The water then moves inward under the influence of the airflow, further removing dust with the help of the low-density sponges. Small amounts of water are added through the water distribution pipe, and operation continues. However, dust accumulates inside the low-density sponges, reducing the dust removal efficiency. Furthermore, the outflowing air contains moisture. According to the design-set switching time, upon reaching the switching time, the drive motor activates, causing the rotating seat to rotate. The rotating seat then drives the arc-shaped plate to rotate, moving it from the blocked air inlet duct to the open air inlet duct. After rotating to the open air inlet duct, the arc-shaped rack drives the driven gear to rotate, which in turn drives the drive disc to rotate. The drive disc, through push rod two, pushes push plate three to compress the high-density sponge and transmits force to push plate two. Push plate two, through push rod one, pushes push plate one to compress the low-density sponge. The high-density sponge... With a large degree of compression, under the same force, low-density sponge has a greater compression capacity, which can squeeze out the mud and water from the low-density sponge. During this process, water is replenished through the distribution pipe for washing. By designing the number of teeth on the arc-shaped rack, transition gear, and driven gear, the drive disc rotates 4-6 times in each cycle, that is, the high-density sponge and low-density sponge are compressed back and forth 4-6 times to remove mud and water. By controlling the rotation angle or detecting the position of the arc-shaped rack, the drive motor stops when the arc-shaped rack disengages from the driven gear, the air inlet valve of the air inlet duct closes, and the sponge is washed. Water supply to the pipes is stopped. The heating coil heats the water, and then outdoor air is introduced through the drain air inlet and discharged through the drain air outlet. This process dries both high-density and low-density sponges. The heating coil has air outlets, and the ratio of hot air to outdoor air is controlled by valves to achieve the drying purpose. At the same time, the temperature of the high-density and low-density sponges is controlled. A negative pressure fan is installed at the drain air outlet. The negative pressure forces air into the drain air inlet and heating coil, and the mud and water squeezed out of the low-density sponge enters the drainage chamber and is discharged through the sewage pipe.

2. The special explosion-proof air conditioner indoor unit for use in high-temperature dust environments according to claim 1, characterized in that, The driving device includes an explosion-proof motor housing connected to the explosion-proof housing, a drive motor is installed inside the explosion-proof motor housing, the drive motor is connected to a reducer, a drive shaft is connected to the rotating seat, and the drive shaft is connected to the output shaft of the reducer. The baffle is an arc-shaped plate with an arc angle of 160°-200°. The inner side of the arc-shaped plate is connected to the connecting seat through a support rod. An arc-shaped rack is provided on the outer side of the arc-shaped plate with an arc angle of 45°-90°. Two air inlets are symmetrically arranged on both sides of the explosion-proof housing. A transverse drive disc is provided at the inner end of the air inlets. An eccentric shaft that cooperates with the push rod is provided on the drive disc. The drive disc is connected to a driven gear that cooperates with the arc-shaped rack.

3. The special explosion-proof air conditioner indoor unit for use in high-temperature dust environments according to claim 1, characterized in that, The air inlet duct is provided with an insertion port that mates with the support cylinder, and the support cylinder is detachably inserted into the insertion port.

4. The special explosion-proof air conditioner indoor unit for use in high-temperature dust environments according to claim 1, characterized in that, The air inlet duct is equipped with support rails for supporting push plate two and push plate three.

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