Ventilation and drainage device for heating and ventilation equipment

Abstract

The utility model discloses a ventilation and drainage device for heating and ventilation equipment. The ventilation and drainage device comprises a shell, a filtering device embedded in one side wall of the shell, a heating device, an accumulated water recycling device, a humidifying device and an exhaust device embedded in the other side wall of the shell, wherein the heating device, the accumulated water recycling device and the humidifying device are arranged in the shell; an air inlet of the filtering device is located on the outer side of the shell and communicates with an air outlet of the heating and ventilation equipment, and an air outlet of the filtering device is located in the shell and faces the exhaust device; the heating device is connected in series between an air inlet and an air outlet of the filtering device; the accumulated water recycling device is arranged on the filtering device and is positioned between the heating device and the air outlet of the filtering device; a water outlet of the accumulated water recycling device is connected with a water inlet of the humidifying device, and a mist outlet of the humidifying device is located between an air inlet of the filtering device and an air inlet of the exhaust device. The utility model relates to the technical field of heating and ventilation equipment, and can solve the problem that a ventilation and drainage device for the heating and ventilation equipment in the prior art does not recycle condensed water drops.

Description

Technical Field

[0001] The utility model relates to the technical field of HVAC equipment, in particular to a ventilation and drainage device for HVAC equipment. Background Art

[0002] HVAC equipment has the functions of heating, ventilation and air conditioning, and is one of the commonly used electromechanical equipment in interior decoration. Chinese utility model patent CN216203855U discloses a ventilation and drainage device based on HVAC equipment, including HVAC equipment; the HVAC equipment is composed of a protective shell, a filter structure, a ventilation device, a drainage structure and a humidifying device; the protective shell, one side of the protective shell is fixedly connected with the filter structure; the ventilation device, the ventilation device is fixedly connected to the inside of the protective shell, and the ventilation device and the drainage structure are overlapped; the drainage structure, the drainage structure is movably connected to the inside of the protective shell; the humidifying device, the humidifying device is movably connected to the bottom of the protective shell.

[0003] The water vapor generated by the frequent alternation of hot and cold air will condense into water droplets. The ventilation and drainage device recycles the water droplets, which wastes resources to a certain extent. Moreover, the long-term contact between the threaded rod and the water vapor easily causes the accelerated corrosion and damage of the metal components. Therefore, it is necessary to provide a ventilation and drainage device for HVAC equipment, which can solve the problem that the ventilation and drainage device for HVAC equipment in the prior art does not recycle the condensed water droplets. Summary of the invention

[0004] The utility model aims to provide a ventilation and drainage device for HVAC equipment, which can solve the problem that the ventilation and drainage device for HVAC equipment in the prior art fails to recycle condensed water droplets.

[0005] The utility model is achieved in this way:

[0006] A ventilation and drainage device for HVAC equipment comprises an outer shell, a filter device embedded in one side wall of the outer shell, a heating device arranged in the outer shell, a water recovery device and a humidifying device, and an exhaust device embedded in the other side wall of the outer shell; the air inlet of the filter device is located on the outer side of the outer shell and is connected with the air outlet of the HVAC equipment, and the air outlet of the filter device is located in the outer shell and is arranged facing the exhaust device; the heating device is connected in series between the air inlet and the air outlet of the filter device, the water recovery device is arranged on the filter device and is located between the heating device and the air outlet of the filter device; the water outlet of the water recovery device is connected to the water inlet of the humidifying device, and the mist outlet of the humidifying device is located between the air inlet of the filter device and the air inlet of the exhaust device.

[0007] The filtering device comprises an air intake pipe, an electric fan, a front filter and an exhaust pipe; the air intake pipe is arranged on a side wall of the shell, the air inlet of the air intake pipe is located on the outside of the shell and is embedded with the front filter, the air outlet of the air intake pipe is located in the shell, and the electric fan is arranged in the air intake pipe; the air outlet of the air intake pipe is connected with the air inlet of the heating device, the air outlet of the heating device is connected with the air inlet of the exhaust pipe, and the air outlet of the exhaust pipe is arranged facing the exhaust device; the exhaust pipe is an inverted "J"-shaped structure with high ends and low middle, and the accumulated water recovery device is arranged at the lowest point of the exhaust pipe.

[0008] A collecting frame is arranged on one side wall of the shell, and an ash collecting box with a top opening is arranged in the collecting frame; the air inlet of the air inlet pipe is a slope structure and is arranged facing the opening of the ash collecting box.

[0009] The heating device comprises a heating box and a plurality of heating wires evenly distributed in the heating box; the air outlet of the air inlet pipe is connected to the lower part of the heating box, and the air inlet of the exhaust pipe is connected to the upper part of the heating box.

[0010] The accumulated water recovery device includes a fixed plate, a telescopic rod, a first support plate, a connecting rod, a support plate, a plug and a placement box; the fixed plate is installed above the lowest horizontal section of the exhaust pipe, and the first support plate is liftably arranged between the fixed plate and the lowest horizontal section of the exhaust pipe through the telescopic rod; the support plate is connected to the bottom of the first support plate through a plurality of connecting rods and is located below the lowest horizontal section of the exhaust pipe, a plurality of plugs are arranged on the support plate at intervals, a plurality of drainage holes are formed at the bottom of the lowest horizontal section of the exhaust pipe, and a plurality of plugs can be correspondingly sealed in the plurality of drainage holes; the placement box is arranged on the humidifying device through a plurality of support bars and is located directly below the support plate, and a hollow portion is formed on the support plate.

[0011] The placement box is provided with a filter box, and the filter box is provided with a cellulose membrane. The water outlet of the placement box is located below the cellulose membrane and is connected to the humidifying device.

[0012] The humidifying device comprises a water tank, a water pump and a spray pipe; the water tank is connected to the water outlet of the placement box, the water pump is arranged on the water tank, the water inlet of the water pump is connected to the bottom of the water tank, the water outlet of the water pump is connected to one end of the spray pipe, and the other end of the spray pipe is located between the air outlet of the exhaust pipe and the air inlet of the exhaust device and is provided with an atomizing nozzle.

[0013] A liquid level gauge is arranged in the water tank, the top of the water tank is connected to an external water source through a water tank water inlet pipe, and the liquid level gauge is linked to a valve.

[0014] A second support plate is vertically provided between the top of the water tank and the top plate of the outer shell, and the fixed plate is horizontally installed between the second support plate and the outer wall of the heating box of the heating device; the heating device and the second support plate divide the outer shell into three independent spaces, namely, the heating space, the condensation space and the humidification space, the air outlet of the exhaust pipe passes through the second support plate and is located in the humidification space, the air inlet of the exhaust device is connected to the humidification space, and the other end of the spray pipe is located between the air outlet of the exhaust pipe and the air inlet of the exhaust device.

[0015] The exhaust device includes an outlet pipe, a protective cover, a protective net and a circular cellulose membrane; one end of the outlet pipe is installed on the other side wall of the shell and connected to the humidification space, and the protective cover covers the outlet pipe; the circular cellulose membrane is installed in the other end of the outlet pipe through the protective net.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Since the utility model is provided with an exhaust pipe and a water recovery device, the exhaust pipe in the shape of an inverted "J" can increase the condensation discharge path of the air, thereby ensuring that the water vapor in the hot air is fully condensed into water droplets and accumulated in the lower horizontal section of the exhaust pipe; when the plug is removed from the drainage hole, the condensed water in the exhaust pipe is discharged to the filter box, and is stored in the water tank after filtration, which is beneficial to the recycling of condensed water, reduces resource waste, and avoids the problem of accelerated corrosion caused by long-term contact between metal components and water vapor.

[0018] 2. Since the utility model is provided with a humidifying device, the condensed water collected in the water tank is pumped to the atomizing pipe by a water pump and sprayed out in atomization, which is used to provide atomization humidification for the exhausted air between the air outlet of the exhaust pipe and the air inlet of the exhaust device, thereby making full use of the condensed water, reducing resource waste, and avoiding the exhausted air from being too dry. Combined with triple filtration, the air quality is greatly optimized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the ventilation and drainage device for HVAC equipment of the utility model;

[0020] Figure 2 It is a cross-sectional view of the ventilation and drainage device for HVAC equipment of the utility model;

[0021] Figure 3 yes Figure 1 A magnified schematic diagram of center A.

[0022] In the figure, 1, housing; 2, filtering device; 201, air inlet pipe; 202, electric fan; 203, front filter; 204, collecting frame; 205, ash box; 206, exhaust pipe; 3, heating device; 301, heating box; 302, heating wire; 4, water recovery device; 401, fixing plate; 402, telescopic rod; 403, first supporting plate; 404, connecting rod; 405, supporting plate; 406, plug ; 407, support bar; 408, placement box; 409, filter box; 410, cellulose membrane; 411, connecting pipe; 5, humidification device; 501, water tank; 502, water pump; 503, water supply pipe; 504, liquid level meter; 505, spray pipe; 6, exhaust device; 601, air outlet pipe; 602, protective cover; 603, protective net; 604, circular cellulose membrane; 7, second support plate; 8, water tank water inlet pipe. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0024] Please see attached Figure 1 A ventilation and drainage device for HVAC equipment comprises a shell 1, a filter device 2 embedded in one side wall of the shell 1, a heating device 3 arranged in the shell 1, a water recovery device 4 and a humidifying device 5, and an exhaust device 6 embedded in the other side wall of the shell 1; the air inlet of the filter device 2 is located on the outside of the shell 1 and is connected to the air outlet of the HVAC equipment, and the air outlet of the filter device 2 is located in the shell 1 and is arranged facing the exhaust device 6; the heating device 3 is connected in series between the air inlet and the air outlet of the filter device 2, the water recovery device 4 is arranged on the filter device 2 and is located between the heating device 3 and the air outlet of the filter device 2; the water outlet of the water recovery device 4 is connected to the water inlet of the humidifying device 5, and the mist outlet of the humidifying device 5 is located between the air inlet of the filter device 2 and the air inlet of the exhaust device 6.

[0025] Since the exhaust of the HVAC equipment has a certain temperature, it can condense into water droplets after condensation. The exhaust of the HVAC equipment is obtained through the filter device 2, and the air discharged from the HVAC equipment is filtered at the same time. The heating device 3 is used to further heat the air filtered by the filter device 2 so that the air can condense into water droplets when it is discharged. The water recovery device 4 is used to recover the condensed water droplets, reduce resource waste, and indirectly utilize the waste heat of the air. The humidification device 5 uses condensed water to humidify the air discharged from the outlet of the filter device 2, and then discharges it into the air through the exhaust device 6 to prevent the air from drying out.

[0026] Please see attached Figure 2The filtering device 2 includes an air inlet pipe 201, an electric fan 202, a front filter 203 and an exhaust pipe 206; the air inlet pipe 201 is arranged on a side wall of the shell 1, the air inlet of the air inlet pipe 201 is located on the outside of the shell 1 and is embedded with the front filter 203, the air outlet of the air inlet pipe 201 is located in the shell 1, and the electric fan 202 is arranged in the air inlet pipe 201; the air outlet of the air inlet pipe 201 is connected to the air inlet of the heating device 3, the air outlet of the heating device 3 is connected to the air inlet of the exhaust pipe 206, and the air outlet of the exhaust pipe 206 is arranged facing the exhaust device 6; the exhaust pipe 206 is an inverted "J"-shaped structure with high ends and low middle, and the accumulated water recovery device 4 is arranged at the lowest point of the exhaust pipe 206.

[0027] Preferably, the electric fan 202 can be a small blower to accelerate the air flow in the air inlet pipe 201 to fully obtain the air exhausted by the HVAC equipment. The blower power can be adaptively adjusted according to the exhaust volume of the HVAC equipment. The front filter 203 is used to filter the air before it enters the air inlet pipe 201. The filtered air is heated by the heating device 3 and then discharged from the outlet of the exhaust pipe 206.

[0028] The exhaust pipe 206 of the inverted "J"-shaped structure not only extends the air flow path, ensuring sufficient cooling of the air to achieve the purpose of condensation to produce water droplets, but also the lowest horizontal section in the middle of the exhaust pipe 206 can be used to accumulate condensed water, which facilitates the collection of condensed water without affecting the discharge of air.

[0029] Please see attached Figure 1 and attached Figure 2 A collecting frame 204 is provided on one side wall of the housing 1 , and an ash collecting box 205 with a top opening is provided in the collecting frame 204 ; the air inlet of the air inlet pipe 201 is a slope structure and is arranged facing the opening of the ash collecting box 205 .

[0030] The dust collecting box 205 is arranged below the air inlet of the air inlet pipe 201 of the inclined structure, so that the dust attached to the front filter 203 can fall into the dust collecting box 205, which is convenient for centralized cleaning of dust and reduces dust.

[0031] Please see attached Figure 2 The heating device 3 includes a heating box 301 and a plurality of heating wires 302 evenly distributed in the heating box 301 ; the air outlet of the air inlet pipe 201 is connected to the lower part of the heating box 301 , and the air inlet of the exhaust pipe 206 is connected to the upper part of the heating box 301 .

[0032] The heating wire 302 may be an electric heating wire, which can heat the air passing through the heating wire 302 after being powered on. The power of the electric heating wire can be adaptively adjusted according to actual heating requirements.

[0033] Preferably, the heating box 301 can be arranged vertically, with air intake at the bottom and air exhaust at the top, which can increase the air flow path and thus improve the heating effect of the electric heating wire on the air.

[0034] Please see attached Figure 2 and attached Figure 3 The accumulated water recovery device 4 includes a fixed plate 401, a telescopic rod 402, a first support plate 403, a connecting rod 404, a support plate 405, a plug 406 and a placement box 408; the fixed plate 401 is installed above the lowest horizontal section of the exhaust pipe 206, and the first support plate 403 is liftably arranged between the fixed plate 401 and the lowest horizontal section of the exhaust pipe 206 through the telescopic rod 402; the support plate 405 is connected to the bottom of the first support plate 403 through a plurality of connecting rods 404 and is located below the lowest horizontal section of the exhaust pipe 206, and a plurality of plugs 406 are arranged on the support plate 405 at intervals, and a plurality of drainage holes are formed at the bottom of the lowest horizontal section of the exhaust pipe 206, and the plurality of plugs 406 can be correspondingly blocked in the plurality of drainage holes; the placement box 408 is arranged on the humidifying device 5 through a plurality of support bars 407 and is located directly below the support plate 405, and a hollow portion is formed on the support plate 405.

[0035] Preferably, the telescopic rod 402 can be a hydraulic telescopic rod, and the oil pressure is used to control the lifting and lowering of the first support plate 403, the connecting rod 404, the support plate 405, and the plug 406. The telescopic range of the hydraulic telescopic rod and the height of the connecting rod 404 can be adaptively adjusted according to the blocking and disengagement requirements of the plug 406 and the drain hole. When the plug 406 descends, it disengages from the drain hole at the bottom of the lowest horizontal section of the exhaust pipe 206, so that condensed water can be discharged through the drain hole to prevent excessive condensed water from affecting the exhaust. When the plug 406 rises, it is inserted into the drain hole to block the drain hole, which is convenient for accumulating condensed water and prevents air from being discharged directly through the drain hole, which fails to achieve the effect of condensed water collection and air filtration and humidification discharge.

[0036] Preferably, the plug 406 can be a stainless steel column wrapped with a rubber sleeve, which has high structural strength and can effectively block the drainage hole through the rubber sleeve. The hollow part on the support plate 405 is convenient for condensed water to flow down from the drainage hole and flow into the placement box 408 below.

[0037] Please see attached Figure 2 The placement box 408 is provided with a filter box 409, and the filter box 409 is provided with a cellulose membrane 410. The water outlet of the placement box 408 is located below the cellulose membrane 410 and is connected to the humidification device 5 through a connecting pipe 411.

[0038] The filter box 409 is used to collect condensed water. After the condensed water drips into the filter box 409, it is filtered through the cellulose membrane 410 and then discharged to the humidification device 5, thereby improving the cleanliness of the condensed water recycling.

[0039] Please see attached Figure 2 The humidifying device 5 includes a water tank 501, a water pump 502, a water supply pipe 503 and a spray pipe 505; the water tank 501 is connected to the water outlet of the placement box 408 through the connecting pipe 411, the water pump 502 is arranged on the water tank 501, the water inlet of the water pump 502 is connected to the bottom of the water tank 501 through the water supply pipe 503, the water outlet of the water pump 502 is connected to one end of the spray pipe 505, and the other end of the spray pipe 505 is located between the air outlet of the exhaust pipe 206 and the air inlet of the exhaust device 6 and is provided with an atomizing nozzle.

[0040] Preferably, the water pump 502 can be a small water pump, and the water pump power can be adaptively selected according to the atomization demand. The water tank 501 is used to collect condensed water, which is pumped to the spray pipe 505 through the water supply pipe 503 by the water pump 502, and then atomized and sprayed out by the atomizing nozzle. The air discharged from the air outlet of the exhaust pipe 206 is humidified when it flows through the atomizing nozzle, and then discharged from the exhaust device 6 to avoid air drying.

[0041] The humidifying device 5 can be turned on according to actual use requirements. Preferably, the humidifying device 5 can be controlled in conjunction with the air humidity monitoring equipment in the prior art.

[0042] Preferably, a one-way solenoid valve is provided inside the connecting pipe 411 to prevent the water in the water tank 501 from flowing back into the filter box 409 .

[0043] Please see attached Figure 2 The water tank 501 is provided with a liquid level gauge 504. The top of the water tank 501 is connected to an external water source through a water tank water inlet pipe 8 via a valve, and the liquid level gauge 504 is linked to the valve.

[0044] Preferably, the liquid level gauge 504 can be a pressure type liquid level gauge, which is installed at the bottom of the water tank 501 and uses water pressure to monitor the water level. If the water level in the water tank 501 is too low or there is no water, it is easy to cause the water pump 502 to dry out and fail to atomize. Through the linkage between the liquid level gauge 504 and the valve, the water tank 501 is supplemented with external water through the water tank water inlet pipe 8 when the water level in the water tank 501 is too low.

[0045] Please see attached Figure 2 A second support plate 7 is vertically provided between the top of the water tank 501 and the top plate of the outer shell 1, and the fixing plate 401 is horizontally installed between the second support plate 7 and the outer wall of the heating box 301 of the heating device 3; the heating device 3 and the second support plate 7 divide the outer shell 1 into three independent spaces, namely, the heating space, the condensation space and the humidification space, the air outlet of the exhaust pipe 206 passes through the second support plate 7 and is located in the humidification space, the air inlet of the exhaust device 6 is connected to the humidification space, and the other end of the spray pipe 505 is located between the air outlet of the exhaust pipe 206 and the air inlet of the exhaust device 6.

[0046] The air inlet pipe 201 and the electric fan 202 are located in the heating space, the exhaust pipe 206 and the accumulated water recovery device 4 are located in the condensing space, the water tank 501 is partially located in the condensing space and partially located in the humidifying space, and the spray pipe 505 is located in the humidifying space. Through the arrangement of the three independent spaces, the housing 1 is reasonably divided into zones, which is convenient for heating, condensing and exhausting the air without affecting each other.

[0047] Please see attached Figure 2 The exhaust device 6 includes an outlet pipe 601, a protective cover 602, a protective net 603 and a circular cellulose membrane 604; one end of the outlet pipe 601 is installed on the other side wall of the shell 1 and is connected to the humidification space, and the protective cover 602 covers the outlet pipe 601; the circular cellulose membrane 604 is installed in the other end of the outlet pipe 601 through the protective net 603.

[0048] Preferably, an air outlet is reserved on the other side wall of the housing 1, and the air outlet pipe 601 can be a round tube larger than the air outlet. The air outlet pipe 601 is connected to the humidification space through the air outlet to meet the exhaust demand. The circular cellulose membrane 604 is used to filter the exhausted air again, and the protective net 603 is used to protect the circular cellulose membrane 604 for easy replacement, while also preventing external debris from entering the air outlet pipe 601.

[0049] Please see attached Figure 1 To Attachment Figure 3 , the working process and working principle of the utility model are:

[0050] When the air outlet of the HVAC equipment is exhausted, the electric fan 202 is started to suck the air exhausted by the HVAC equipment into the heating box 301 through the air inlet pipe 201. When the air enters the air inlet pipe 201, it is filtered by the front filter 203 at the air inlet, and impurities in the air adhere to the front filter 203. After the electric fan 202 is turned off, the impurities on the front filter 203 can fall into the dust box 205, which is convenient for the centralized cleaning of impurities.

[0051] The heating wire 302 is powered on, and the filtered air enters the heating box 301 and is heated by the heating wire 302. The air flows upward from the lower part of the heating box 301 to the upper part, extending the air flow path, ensuring the heating effect of the air, and then discharged to the exhaust pipe 206. The inverted "J"-shaped exhaust pipe 206 extends the exhaust path of the air, thereby ensuring that the air is fully cooled. In this process, water droplets are condensed and accumulated in the lowest horizontal section of the exhaust pipe 206. The cooled air enters the humidification space through the air outlet of the exhaust pipe 206.

[0052] The telescopic rod 402 is started to push the first support plate 403, the connecting rod 404, the supporting plate 405 and the plug 406 downward, so that the plug 406 is disengaged from the drainage hole of the lowest horizontal section of the exhaust pipe 206, and the condensed water is discharged through the drainage hole and flows down to the filter box 409 of the placement box 408 through the hollow part of the supporting plate 405. The condensed water is filtered through the cellulose membrane 410 and enters the water tank 501, completing the recovery of the condensed water. After recovery, the plug 406 rises through the telescopic rod 402 and re-blocks the drainage hole.

[0053] The water pump 502 is started, and the water in the water tank 501 is pumped to the spray pipe 505 through the water pump 502, and then the water mist is sprayed out through the atomizing nozzle of the spray pipe 505. The air discharged from the exhaust pipe 206 is humidified after passing through the water mist, and then discharged from the housing 1 through the outlet pipe 601. The discharged air is filtered again through the circular cellulose membrane 604 to ensure the cleanliness of the air.

[0054] The water level in the water tank 501 is monitored by the liquid level meter 504, and the minimum water level threshold and the maximum water level threshold can be preset. When the liquid level meter 504 detects that the water level in the water tank 501 is lower than the water level threshold, an external water source is introduced through the water tank water inlet pipe 8 to prevent the water pump 502 from dry burning and damage. When the water level in the water tank 501 reaches the maximum water level threshold, the supply of external water source is stopped.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A ventilation and drainage device for HVAC equipment, characterized by: The invention comprises a housing (1), a filter device (2) embedded in one side wall of the housing (1), a heating device (3) arranged in the housing (1), a water recovery device (4) and a humidifying device (5), and an exhaust device (6) embedded in the other side wall of the housing (1); the air inlet of the filter device (2) is located outside the housing (1) and communicates with the air outlet of the heating and ventilation equipment, and the air outlet of the filter device (2) is located in the housing (1) and faces the exhaust device (6); the heating device (3) is connected in series between the air inlet and the air outlet of the filter device (2), the water recovery device (4) is arranged on the filter device (2) and is located between the heating device (3) and the air outlet of the filter device (2); the water outlet of the water recovery device (4) is connected to the water inlet of the humidifying device (5), and the mist outlet of the humidifying device (5) is located between the air inlet of the filter device (2) and the air inlet of the exhaust device (6).

2. The ventilation and drainage device for HVAC equipment according to claim 1, characterized in that: The filtering device (2) comprises an air intake pipe (201), an electric fan (202), a front filter (203) and an exhaust pipe (206); the air intake pipe (201) is arranged on a side wall of the housing (1); the air intake of the air intake pipe (201) is located outside the housing (1) and is embedded with the front filter (203); the air outlet of the air intake pipe (201) is located inside the housing (1); the electric fan (202) is arranged inside the air intake pipe (201); the air outlet of the air intake pipe (201) is connected to the air intake of the heating device (3); the air outlet of the heating device (3) is connected to the air intake of the exhaust pipe (206); the air outlet of the exhaust pipe (206) is arranged facing the exhaust device (6); the exhaust pipe (206) is an inverted "J"-shaped structure with high ends and low middle; the accumulated water recovery device (4) is arranged at the lowest point of the exhaust pipe (206).

3. The ventilation and drainage device for HVAC equipment according to claim 2, characterized in that: A collecting frame (204) is provided on one side wall of the housing (1), and an ash collecting box (205) with a top opening is provided inside the collecting frame (204); the air inlet of the air inlet pipe (201) is a sloped structure and is arranged facing the opening of the ash collecting box (205).

4. The ventilation and drainage device for HVAC equipment according to claim 2, characterized in that: The heating device (3) comprises a heating box (301) and a plurality of heating wires (302) evenly distributed in the heating box (301); the air outlet of the air inlet pipe (201) is connected to the lower part of the heating box (301), and the air inlet of the exhaust pipe (206) is connected to the upper part of the heating box (301).

5. The ventilation and drainage device for HVAC equipment according to claim 2, characterized in that: The accumulated water recovery device (4) comprises a fixed plate (401), a telescopic rod (402), a first supporting plate (403), a connecting rod (404), a supporting plate (405), a plug (406) and a placement box (408); The fixing plate (401) is installed above the lowest horizontal section of the exhaust pipe (206); the first support plate (403) is escalably arranged between the fixing plate (401) and the lowest horizontal section of the exhaust pipe (206) via a telescopic rod (402); the supporting plate (405) is connected to the bottom of the first support plate (403) via a plurality of connecting rods (404) and is located below the lowest horizontal section of the exhaust pipe (206); a plurality of plugs (406) are arranged at intervals on the supporting plate (405); a plurality of drainage holes are formed at the bottom of the lowest horizontal section of the exhaust pipe (206); the plurality of plugs (406) can be correspondingly blocked in the plurality of drainage holes; the placement box (408) is arranged on the humidifying device (5) via a plurality of supporting bars (407) and is located directly below the supporting plate (405); a hollow portion is formed on the supporting plate (405).

6. The ventilation and drainage device for HVAC equipment according to claim 5, characterized in that: The placement box (408) is provided with a filter box (409), and the filter box (409) is provided with a cellulose membrane (410). The water outlet of the placement box (408) is located below the cellulose membrane (410) and is connected to the humidification device (5).

7. The ventilation and drainage device for HVAC equipment according to claim 6, characterized in that: The humidifying device (5) comprises a water tank (501), a water pump (502) and a spray pipe (505); the water tank (501) is connected to the water outlet of the placement box (408), the water pump (502) is arranged on the water tank (501), the water inlet of the water pump (502) is connected to the bottom of the water tank (501), the water outlet of the water pump (502) is connected to one end of the spray pipe (505), and the other end of the spray pipe (505) is located between the air outlet of the exhaust pipe (206) and the air inlet of the exhaust device (6) and is provided with an atomizing nozzle.

8. The ventilation and drainage device for HVAC equipment according to claim 7, characterized in that: The water tank (501) is provided with a liquid level meter (504), the top of the water tank (501) is connected to an external water source via a water tank water inlet pipe (8), and the liquid level meter (504) is linked to a valve.

9. The ventilation and drainage device for HVAC equipment according to claim 7 or 8, characterized in that: A second support plate (7) is vertically arranged between the top of the water tank (501) and the top plate of the outer shell (1); the fixing plate (401) is horizontally installed between the second support plate (7) and the outer wall of the heating box (301) of the heating device (3); the heating device (3) and the second support plate (7) divide the outer shell (1) into three independent spaces, namely, a heating space, a condensation space and a humidification space; the air outlet of the exhaust pipe (206) passes through the second support plate (7) and is located in the humidification space; the air inlet of the exhaust device (6) is connected to the humidification space; and the other end of the spray pipe (505) is located between the air outlet of the exhaust pipe (206) and the air inlet of the exhaust device (6).

10. The ventilation and drainage device for HVAC equipment according to claim 9, characterized in that: The exhaust device (6) comprises an exhaust pipe (601), a protective cover (602), a protective net (603) and a circular cellulose membrane (604); one end of the exhaust pipe (601) is installed on the other side wall of the outer shell (1) and is connected to the humidification space, and the protective cover (602) covers the exhaust pipe (601); the circular cellulose membrane (604) is installed in the other end of the exhaust pipe (601) through the protective net (603).

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