Building heating and ventilation device

Abstract

The utility model discloses a building heating and ventilation device which comprises a building heating and ventilation device body, the building heating and ventilation device body comprises a shell, an air inlet and an air outlet are formed in the inner walls of the two sides of the shell respectively, and a fan and an electric heating wire located on the right side of the fan are fixedly installed on the inner wall of the bottom of the shell. An air inlet filter screen and an air outlet filter screen are fixedly installed in the air inlet hole and the air outlet hole respectively, and a slag removing and dredging mechanism matched with the air inlet filter screen is installed on the shell. According to the utility model, warm air supply work and sound absorption and noise reduction during ventilation are facilitated, impurities in extracted external fresh air can be conveniently filtered and intercepted, and the air inlet filter screen can be conveniently and automatically cleaned and dredged in a back-blowing manner at regular time from inside to outside and cleaned in a reciprocating brushing manner on the outer side of the air inlet filter screen; the air inlet filter screen can be effectively and automatically cleaned and dredged in a timed mode, timed dismounting, cleaning and dredging by personnel are not needed, time and labor are saved, and the use stability and the cleaning automation degree are improved.

Description

Technical Field

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

[0002] HVAC is the name of a classification of work types in building equipment, mainly including heating, ventilation and air conditioning. The full name of HVAC in the subject classification is heating, gas supply, ventilation and air conditioning engineering, which is an integral part of the building. Ventilation is the process of sending air into or out of the room, using outdoor air (called fresh air or new wind) to replace the air in the building (called indoor air), usually divided into natural ventilation and mechanical ventilation; air conditioning is referred to as air conditioning, which is used to adjust the temperature, humidity, cleanliness and air flow rate in the room or space, and provide a sufficient amount of fresh air for the building environment control system. Ventilation is also called air exchange, which is to use mechanical or natural methods to send enough fresh air to the indoor space so that the indoor air meets the hygiene requirements and the needs of the production process; various facilities that complete ventilation work in the building are collectively referred to as ventilation equipment. Ventilation equipment is divided into exhaust fans, exhaust fans, fans, etc., and is divided into industrial and household types, and fans are divided into high, medium, low, negative pressure, etc.

[0003] After searching, Chinese patent, publication number CN212538111U discloses a building HVAC device, including a shell, one side of the shell is provided with an air inlet, the inner cavity of the shell is fixedly connected with a plurality of sound absorbing panels, the bottom of the inner cavity of the shell is provided with a bearing platform, the bottom of the bearing platform is fixedly connected with the top of one of the sound absorbing panels, the top of the bearing platform is fixedly connected with a driving motor, the output end of the driving motor is rotatably connected with a fan blade, one side of the air inlet is clamped with a first dust filter, the inner cavity of the shell and one side of the fan blade is clamped with a second dust filter; through the arrangement of a plurality of sound absorbing panels, the sound absorbing panels absorb the generated noise, thereby reducing the noise generated by the device, and through the arrangement of the driving motor and the fan blade, the ventilation effect is enhanced, and through the coordinated use of the first dust filter and the second dust filter, the purpose of filtering impurities is achieved, and the cleanliness of the device is improved.

[0004] The above technology discloses a building HVAC device, including a shell, which achieves sound absorption and noise reduction during air supply through a sound-absorbing panel arranged on the inner wall of the shell, and achieves filtration and interception of impurities in the fresh air drawn in through a first dust-proof filter on the left. However, it still has the following shortcomings: 1. The second dust-proof filter located on the right is for air outlet, and will not accumulate and clog impurities when the wind blows from the inside to the outside. However, the first dust-proof filter located on the left is for air intake filtration during suction, and its filter holes and the left side are prone to accumulate and clog impurities, resulting in blockage. Personnel need to regularly disassemble, clean and dredge them, which is time-consuming and labor-intensive. Improvement is needed. In view of this, we propose a building HVAC device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a building heating and ventilation device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a building heating, ventilation and ventilation device, comprising a building heating, ventilation and ventilation device body, the building heating, ventilation and ventilation device body comprising a shell, the inner walls on both sides of the shell are respectively provided with air inlet holes and air outlet holes, a fan and an electric heating wire located on the right side of the shell are fixedly installed on the bottom inner wall of the shell, an air inlet filter and an air outlet filter are respectively fixedly installed in the air inlet and the air outlet, new air from the outside is drawn through the air inlet filter and blown to the right when the fan is turned on, the electric heating wire is used to heat the gas to form warm air, and the warm air is blown out through the air outlet filter to perform warm air supply work;

[0007] The shell is provided with a slag cleaning and dredging mechanism matched with the air inlet filter, and the slag cleaning and dredging mechanism comprises a rectangular box fixedly connected to the left side of the top of the shell, the bottom of the rectangular box is set as an opening, a sliding sleeve in the rectangular box is provided with a reciprocating lifting drive assembly, a driving motor with an output shaft fixedly installed on the top of the rectangular box and fixedly connected to the reciprocating lifting drive assembly, a telescopic vertical guide ventilation and air backblowing assembly is embedded and fixed on the right side of the top of the reciprocating lifting drive assembly, the bottom of the telescopic vertical guide ventilation and air backblowing assembly extends into the shell and is located on the right side of the air inlet filter, and an air outlet connected and fixed to the telescopic vertical guide ventilation and air backblowing assembly is fixedly installed on the right side of the top of the rectangular box Air pump, a PLC controller is fixedly installed on the top left side of the rectangular box, the air pump and the drive motor are electrically connected to the PLC controller, a vertical guide brush cleaning component is fixedly connected to the bottom left side of the reciprocating lifting drive component, the vertical guide brush cleaning component is located at the upper left side of the air intake filter and vertically flush with its left side, the reciprocating lifting drive component is used to drive the telescopic vertical guide ventilation backflush component and the vertical guide brush cleaning component to move back and forth up and down when the drive motor is started, the telescopic vertical guide ventilation backflush component is used to backflush and clean the air intake filter when the air pump is started, and the vertical guide brush cleaning component is used to comprehensively brush and clean the impurities accumulated on the left side of the air intake filter when it moves back and forth up and down.

[0008] Preferably, the reciprocating lifting drive assembly includes a lifting seat slidably sleeved in a rectangular box, a reciprocating screw located in the rectangular box is rotatably connected to the left side of the top of the shell, a reciprocating thread hole threadedly connected to the reciprocating thread screw is opened on the top of the lifting seat, and the top of the reciprocating thread screw is fixedly connected to the bottom end of the output shaft of the driving motor; the lifting seat and the reciprocating thread screw cooperate, and the driving motor is used to drive the reciprocating thread screw to rotate, and the rotation of the reciprocating thread screw drives the lifting seat to move back and forth up and down.

[0009] Preferably, the telescopic vertical ventilation air backblowing assembly includes an outer tube embedded and fixed on the right side of the top of the lifting seat, the bottom end of the outer tube slides through the top of the shell and extends into the interior thereof, the bottom of the outer tube is connected and fixed with a backblowing box, the left side of the backblowing box is connected and fixed with a plurality of backblowing pipe heads, the backblowing pipe head is located on the right side of the air inlet filter and cooperates with it, an inner tube is provided with a sliding sleeve inside the outer tube, the top of the inner tube is connected and fixed with the bottom end of the air outlet of the air pump; the outer tube, backblowing box, backblowing pipe head and inner tube are arranged to cooperate with each other, the lifting seat is used to drive the backblowing box and the backblowing pipe head to move back and forth up and down through the outer tube, the air pump is used to supply air to the inner tube, the gas enters the backblowing box through the outer tube, and is then blown out to the left through the backblowing pipe head that moves back and forth up and down to perform comprehensive backblowing, cleaning and dredging work on the air inlet filter.

[0010] Preferably, the vertical guide brush cleaning assembly includes two vertical guide rods fixedly connected to the left side of the bottom of the lifting seat, the bottom ends of the two vertical guide rods extend to the bottom of the rectangular box and are fixedly connected to the same cleaning brush, the right side of the bristles of the cleaning brush is flush with the left side of the air intake filter, and the two vertical guide rods are slidingly sleeved with the same support plate, and the top of the support plate is fixedly connected to the left side of the bottom of the rectangular box; the vertical guide rods, cleaning brush and support plate are coordinated, and the lifting seat is used to drive the cleaning brush to move back and forth up and down through the two vertical guide rods, and the cleaning brush is used to comprehensively brush and clean the impurities accumulated on the left side of the air intake filter.

[0011] Preferably, the PLC controller is a timer programmable controller.

[0012] Preferably, the tops of both sides of the rectangular box are fixedly connected with a same U-shaped baffle, and the PLC controller, the air pump and the drive motor are all located in the U-shaped baffle.

[0013] Preferably, sound-absorbing panels are fixedly connected to the top inner wall, bottom inner wall, front inner wall and rear inner wall of the shell, two mounting through-holes are provided on the top of the sound-absorbing panel located at the bottom, supports fixedly connected to the bottom inner wall of the shell are provided in the mounting through-holes, the fan and the electric heating wire are fixedly installed on the top of the corresponding supports, and the same transparent plate is embedded and fixed on the front sound-absorbing panel and the front inner wall of the shell.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. This building HVAC device can supply warm air when the fan and the electric heating wire are turned on, absorb sound and reduce noise during ventilation by using the shell, fan, air inlet filter, sound absorbing board, air outlet filter and electric heating wire, and can filter and intercept impurities in the extracted external fresh air by using the air inlet filter;

[0016] 2. This building HVAC device, through the coordination of the air intake filter, rectangular box, PLC controller, drive motor, air pump, reciprocating lifting drive assembly, telescopic vertical guide ventilation back-blowing assembly and vertical guide brush cleaning assembly, can automatically and regularly back-blow the air intake filter from the inside to the outside and reciprocately brush the outside of the air intake filter after pre-setting the start and stop time and interval of the drive motor and the air pump according to the cleaning interval requirements by using the PLC controller. Through the coordination of back-blowing and brushing, the air intake filter can be effectively cleared of residues and dredged automatically and regularly, without the need for personnel to regularly disassemble and clean it, thus saving time and effort and improving the stability of use and the degree of automation of cleaning.

[0017] The utility model is provided with a series of structures, which is convenient for carrying out warm air supply and sound absorption and noise reduction during ventilation, is convenient for filtering and intercepting impurities in the extracted external fresh air, is convenient for regular and automatic backblowing cleaning and dredging of the air intake filter from the inside to the outside and reciprocating brushing cleaning of the outer side. With the cooperation of the above two methods, it is convenient for regular and automatic cleaning and dredging of the air intake filter, without the need for personnel to regularly disassemble and clean it, thus saving time and effort and improving the stability of use and the degree of cleaning automation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a building HVAC device proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the main cross-sectional structure of a building HVAC device proposed by the utility model;

[0020] Figure 3 For the utility model Figure 2 A schematic diagram of the enlarged structure of part A in the figure.

[0021] In the figure: 1. Shell; 101. Air inlet; 102. Air outlet; 103. Fan; 104. Electric heating wire; 2. Rectangular box; 3. U-shaped baffle; 4. Air inlet filter; 5. Lifting seat; 6. Vertical guide rod; 7. Support plate; 8. Cleaning brush; 9. Inner tube; 10. Outer tube; 11. Backflush box; 12. Backflush pipe head; 13. Air pump; 14. Drive motor; 15. PLC controller; 16. Reciprocating screw. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 3 As shown, a building HVAC device proposed in this embodiment includes a building HVAC device body, the building HVAC device body includes a shell 1, and the inner walls on both sides of the shell 1 are respectively provided with an air inlet 101 and an air outlet 102, a fan 103 and an electric heating wire 104 located on the right side thereof are fixedly installed on the bottom inner wall of the shell 1, an air inlet filter 4 and an air outlet filter 104 are respectively fixedly installed in the air inlet 101 and the air outlet 102, and the top inner wall, the bottom inner wall, the front inner wall and the rear inner wall of the shell 1 are all fixedly connected with The sound-absorbing panel, the top of the sound-absorbing panel located at the bottom is provided with two installation holes, and a support fixedly connected to the bottom inner wall of the shell 1 is provided in the installation holes, and the fan 103 and the electric heating wire 104 are respectively fixedly installed on the top of the corresponding support, and the same transparent plate is embedded and fixed on the front inner wall of the sound-absorbing panel and the shell 1 located at the front side. When the fan 103 is turned on, the external new air is extracted through the air inlet filter 4 and blown to the right, and the electric heating wire 104 is used to heat the gas to form warm air, and the warm air is blown out through the air outlet filter to supply warm air;

[0024] A slag cleaning and dredging mechanism that cooperates with the air intake filter 4 is installed on the shell body 1, and the slag cleaning and dredging mechanism includes a rectangular box 2 fixedly connected to the left side of the top of the shell body 1, the bottom of the rectangular box 2 is set to be an opening, and a reciprocating lifting drive assembly is provided in the sliding sleeve of the rectangular box 2. A driving motor 14 with an output shaft fixedly installed on the top of the rectangular box 2 and fixedly connected to the reciprocating lifting drive assembly, a telescopic vertical guide ventilation air backblowing assembly is embedded and fixed on the right side of the top of the reciprocating lifting drive assembly, and the bottom of the telescopic vertical guide ventilation air backblowing assembly extends into the shell body 1 and is located on the right side of the air intake filter 4, an air pump 13 whose air outlet is connected to the telescopic vertical guide ventilation air backblowing assembly is fixedly installed on the right side of the top of the rectangular box 2, a PLC controller 15 is fixedly installed on the left side of the top of the rectangular box 2, and the air pump 13 and the driving motor 14 are electrically connected to the PLC controller 15, a vertical guide brush cleaning assembly is fixedly connected to the left side of the bottom of the reciprocating lifting drive assembly, and the vertical guide brush cleaning assembly is located on the air intake filter. 4 is on the upper left side and vertically flush with its left side, the top of both sides of the rectangular box 2 is fixedly connected with the same U-shaped baffle 3, the PLC controller 15, the air pump 13 and the drive motor 14 are all located in the U-shaped baffle 3, which plays a role in shielding and protecting the PLC controller 15, the air pump 13 and the drive motor 14, the PLC controller 15 is a timeable programmable controller, the reciprocating lifting drive component is used to drive the telescopic vertical guide ventilation air backflush component and the vertical guide brush cleaning component to move back and forth up and down when the drive motor 14 is started, the telescopic vertical guide ventilation air backflush component is used to backflush and clean the air intake filter 4 when the air pump 13 is started, and the vertical guide brush cleaning component is used to comprehensively brush and clean the impurities accumulated on the left side of the air intake filter 4 when it moves back and forth up and down, and the PLC controller 15 is a timeable programmable controller, which facilitates personnel to use the PLC controller 15 to preset the control of the drive motor 14 and the air pump 13 to start and close according to the cleaning interval requirements.

[0025] Specifically, the reciprocating lifting drive assembly includes a lifting seat 5 slidably sleeved in the rectangular box 2, and a reciprocating screw 16 located in the rectangular box 2 is rotatably connected to the left side of the top of the shell 1, wherein a bearing is fixedly connected to the left side of the top of the shell 1, and the inner side of the inner ring of the bearing is fixedly connected to the outer side of the reciprocating screw 16, which plays the effect of rotatably installing the reciprocating screw 16, and a reciprocating wire hole threadedly connected to the reciprocating screw 16 is opened on the top of the lifting seat 5. The threaded connection relationship between the reciprocating screw 16 and the reciprocating wire hole is utilized to facilitate the effect of driving the lifting seat 5 to reciprocate up and down when the reciprocating screw 16 is started, and the top end of the reciprocating screw 16 is fixedly connected to the bottom end of the output shaft of the driving motor 14; the lifting seat 5 and the reciprocating screw 16 are coordinated, and the driving motor 14 is used to drive the reciprocating screw 16 to rotate, and the rotation of the reciprocating screw 16 drives the lifting seat 5 to move reciprocatingly up and down.

[0026] Furthermore, the telescopic vertical ventilation back-blowing assembly includes an outer tube 10 embedded and fixed on the right side of the top of the lifting seat 5, wherein the right side of the top of the lifting seat 5 is provided with an embedding hole fixedly connected to the outside of the outer tube 10, and the bottom end of the outer tube 10 slides through the top of the shell 1 and extends to the inside thereof, wherein the top inner wall of the shell 1 and the top of the upper sound-absorbing board are provided with movable through-holes for the outer tube 10 to slide through, and the bottom of the outer tube 10 is connected and fixed with a back-blowing box 11, and the left side of the back-blowing box 11 is connected and fixed with a plurality of back-blowing pipe heads 12, and the back-blowing pipe heads 12 are located at the inlet. The right side of the air filter 4 cooperates with it, the inner tube 9 is provided with a sliding sleeve in the outer tube 10, and the top of the inner tube 9 is connected and fixed to the bottom end of the air outlet of the air pump 13; the outer tube 10, the backblowing box 11, the backblowing pipe head 12 and the inner tube 9 are coordinated, and the lifting seat 5 is used to drive the backblowing box 11 and the backblowing pipe head 12 to move back and forth up and down through the outer tube 10, and the air pump 13 is used to supply air to the inner tube 9, and the gas enters the backblowing box 11 through the outer tube 10, and then is blown out to the left through the backblowing pipe head 12 that moves back and forth up and down to perform comprehensive backblowing, cleaning and dredging work on the air intake filter 4.

[0027] Furthermore, the vertical guide brush cleaning assembly includes two vertical guide rods 6 fixedly connected to the left side of the bottom of the lifting seat 5, the bottom ends of the two vertical guide rods 6 extend to the bottom of the rectangular box 2 and are fixedly connected with the same cleaning brush 8, the right side of the bristles of the cleaning brush 8 is flush with the left side of the air intake filter 4, and the two vertical guide rods 6 are slidably sleeved with the same support plate 7, wherein the top of the support plate 7 is provided with two vertical guide holes that are respectively slidably sleeved with the corresponding outer sides of the vertical guide rods 6, and the support plate 7 is slidably sleeved on the two vertical guide rods 6 through the two vertical guide holes, which plays the effect of vertical sliding guiding the vertical guide rods 6, and the top of the support plate 7 is fixedly connected to the left side of the bottom of the rectangular box 2; the vertical guide rods 6, the cleaning brush 8 and the support plate 7 are coordinated, and the lifting seat 5 is used to drive the cleaning brush 8 to move back and forth up and down through the two vertical guide rods 6, and the cleaning brush 8 is used to comprehensively brush and clean the impurities accumulated on the left side of the air intake filter 4.

[0028] The method of using this embodiment is as follows: when the fan 103 is turned on, fresh air from the outside is drawn through the air inlet filter 4 and blown to the right. When warm air needs to be supplied, the electric heating wire 104 is turned on to heat the gas blowing to the right to form warm air, and the warm air is blown out through the air outlet filter to supply warm air. During ventilation, the sound absorbing board absorbs noise to perform sound absorption and noise reduction. The air inlet filter 4 can filter and block impurities when fresh air from the outside is drawn in.

[0029] The PLC controller 15 is used to pre-set the start and stop time and interval of the driving motor 14 and the air pump 13 according to the cleaning interval requirements. When the cleaning time is reached, the PLC controller 15 controls the driving motor 14 and the air pump 13 to start, and the driving motor 14 drives the reciprocating screw 16 to rotate. The reciprocating screw 16 rotates to drive the lifting seat 5 to move up and down reciprocatingly. The lifting seat 5 drives the outer tube 10 to move up and down reciprocatingly on the inner tube 9. The outer tube 10 drives multiple back-blowing pipe heads 12 to move up and down reciprocatingly through the back-blowing box 11. When the air pump 13 is started, gas is supplied to the inner tube 9, and the gas enters the back-blowing box 11 through the outer tube 10, and then blows out to the left through the back-blowing pipe head 12 that moves up and down reciprocatingly to comprehensively clean the air intake filter 4. For back-blowing cleaning and dredging work, when the lifting seat 5 is started to move back and forth up and down, the cleaning brush 8 is also driven to move back and forth up and down through the two vertical guide rods 6. When the cleaning brush 8 moves back and forth up and down, the impurities accumulated on the left side of the air intake filter 4 are fully brushed and cleaned. When the closing time is reached, the PLC controller 15 controls the drive motor 14 and the air pump 13 to be turned off, and waits for the next cleaning time to be turned on again for back-blowing and brushing cleaning and dredging work. Through the coordination of timed automatic back-blowing cleaning and dredging from the inside to the outside and reciprocating brushing cleaning on the outside, it is convenient to automatically and regularly remove the slag and dredge the air intake filter 4, without the need for personnel to regularly disassemble and clean and dredge, saving time and effort, and improving the stability of use and the degree of cleaning automation.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A building heating, ventilation and air-conditioning device, comprising a building heating, ventilation and air-conditioning device body, the building heating, ventilation and air-conditioning device body comprising a shell (1), an air inlet (101) and an air outlet (102) are respectively provided on the inner walls on both sides of the shell (1), a fan (103) and an electric heating wire (104) located on the right side of the fan (1) are fixedly mounted on the inner wall at the bottom of the shell (1), and the characteristics are: An air inlet filter (4) and an air outlet filter are fixedly installed in the air inlet (101) and the air outlet (102) respectively; The shell (1) is provided with a slag cleaning and unblocking mechanism matched with an air intake filter (4), the slag cleaning and unblocking mechanism comprising a rectangular box (2) fixedly connected to the left side of the top of the shell (1), the bottom of the rectangular box (2) being arranged as an opening, a reciprocating lifting drive assembly being provided in a sliding sleeve in the rectangular box (2), a driving motor (14) having an output shaft fixedly connected to the reciprocating lifting drive assembly being fixedly installed on the top of the rectangular box (2), a telescopic vertical guide air blowback assembly being embedded and fixedly installed on the right side of the top of the reciprocating lifting drive assembly, and a bottom of the telescopic vertical guide air blowback assembly being provided. The rectangular box (2) extends into the housing (1) and is located on the right side of the air intake filter (4). An air pump (13) whose air outlet is connected to the telescopic vertical guide air backflush assembly is fixedly installed on the right side of the top of the rectangular box (2). A PLC controller (15) is fixedly installed on the left side of the top of the rectangular box (2). The air pump (13) and the drive motor (14) are both electrically connected to the PLC controller (15). A vertical guide brush cleaning assembly is fixedly connected to the left side of the bottom of the reciprocating lifting drive assembly. The vertical guide brush cleaning assembly is located on the upper left side of the air intake filter (4) and is vertically flush with the left side of the air intake filter (4).

2. A building HVAC device according to claim 1, characterized in that: The reciprocating lifting drive assembly comprises a lifting seat (5) slidably sleeved in a rectangular box (2); the left side of the top of the housing (1) is rotatably connected to a reciprocating screw (16) located in the rectangular box (2); a reciprocating thread hole threadedly connected to the reciprocating screw (16) is provided on the top of the lifting seat (5); the top end of the reciprocating screw (16) is fixedly connected to the bottom end of the output shaft of the driving motor (14).

3. A building HVAC device according to claim 2, characterized in that: The telescopic vertical ventilation air back-blowing assembly comprises an outer tube (10) embedded and fixed on the right side of the top of the lifting seat (5), the bottom end of the outer tube (10) slides through the top of the shell (1) and extends to the inside thereof, the bottom of the outer tube (10) is connected and fixed with a back-blowing box (11), the left side of the back-blowing box (11) is connected and fixed with a plurality of back-blowing pipe heads (12), the back-blowing pipe heads (12) are located on the right side of the air inlet filter (4) and cooperate with it, an inner tube (9) is provided in a sliding sleeve inside the outer tube (10), the top end of the inner tube (9) is connected and fixed with the bottom end of the air outlet of the air pump (13).

4. A building HVAC device according to claim 2, characterized in that: The vertical guide brush cleaning assembly comprises two vertical guide rods (6) fixedly connected to the left side of the bottom of the lifting seat (5), the bottom ends of the two vertical guide rods (6) extend to the bottom of the rectangular box (2) and are fixedly connected to the same cleaning brush (8), the right side of the bristles of the cleaning brush (8) is flush with the left side of the air intake filter (4), and the two vertical guide rods (6) are slidably sleeved with the same support plate (7), and the top of the support plate (7) is fixedly connected to the left side of the bottom of the rectangular box (2).

5. A building HVAC device according to claim 1, characterized in that: The PLC controller (15) is a time-programmable controller.

6. A building HVAC device according to claim 1, characterized in that: The tops of both sides of the rectangular box (2) are fixedly connected to a same U-shaped baffle (3), and the PLC controller (15), the air pump (13) and the drive motor (14) are all located inside the U-shaped baffle (3).

7. A building HVAC device according to claim 1, characterized in that: The top inner wall, bottom inner wall, front inner wall and rear inner wall of the shell (1) are all fixedly connected with sound absorbing panels, the top of the sound absorbing panel located at the bottom is provided with two mounting through holes, supports fixedly connected to the bottom inner wall of the shell (1) are provided in the mounting through holes, the fan (103) and the electric heating wire (104) are respectively fixedly mounted on the top of the corresponding supports, and the same transparent plate is embedded and fixed on the front inner wall of the sound absorbing panel and the shell (1).

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