Fresh air purification all-in-one machine and working method thereof

Abstract

The invention provides a fresh air purification all-in-one machine and a working method thereof, relates to the technical field of air purification equipment, and aims to solve the problem that in the prior art, a fresh air machine only has the function of exchanging indoor air and outdoor air, the fresh air purification all-in-one machine comprises an air purification unit, a fresh air unit and an air valve unit, the air purification unit is connected with one end of the fresh air unit, an indoor air inlet and an indoor air outlet are formed in the air purification unit, an outdoor air inlet is formed in the end, away from the air purification unit, of the fresh air unit, and the indoor air inlet and the outdoor air inlet can both communicate with the indoor air outlet. The air valve unit is connected between the air purification unit and the fresh air unit and can regulate and control the size of a flow path between the outdoor air inlet and the indoor air outlet. According to the fresh air purification all-in-one machine, indoor air can be filtered and sterilized, so that the indoor air is purified; and outdoor fresh air can be fed into a room, so that an effect of exchanging indoor air and outdoor air is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification equipment, and in particular to a fresh air purification integrated machine and its working method. Background Art

[0002] A fresh air machine is an effective air purification equipment that can circulate indoor air. On the one hand, it discharges the dirty air indoors to the outside, and on the other hand, after the fresh air outside is sterilized, disinfected, filtered and other measures, it is then input into the room, so that a "fresh air flow field" will be formed indoors, thus meeting the need for fresh air ventilation indoors. Generally, by adopting a high-wind-pressure and large-flow fan, relying on mechanical force to send air into the room from one side, and using a specially designed exhaust fan on the other side to discharge it to the outside, a fresh air flow field is forced to form in the system.

[0003] Existing fresh air machines, such as the fresh air purification device disclosed in the application number 201310305650.2, only have the function of exchanging indoor and outdoor air, and first efficiently purify the air entering from the outside and then send it into the room, but do not have the function of purifying indoor air. And after the existing purification filter element is installed in the purification equipment, its position cannot be adjusted. The filter element bears a large air flow at the position close to the air outlet, resulting in the filter element being more likely to get dirty and blocked at the position close to the air outlet, while the air flow at the position far from the air outlet is small and the degree of pollution is small. If the filter element is replaced as a whole, the filter element is not fully utilized, the filter element replacement cycle is short, and the use cost is high. Summary of the Invention

[0004] The purpose of the present invention is to provide a fresh air purification integrated machine and its working method to solve the problem that the existing fresh air machine only has the function of exchanging indoor and outdoor air. The fresh air purification integrated machine of the present invention can not only filter and sterilize indoor air, remove harmful gases such as formaldehyde and TVOC, so as to purify indoor air; but also send fresh air outside into the room to play the role of exchanging indoor and outdoor air, and is more flexible to use.

[0005] A fresh air purification integrated machine provided by the present invention includes an air purification unit, a fresh air unit and a wind valve unit. One end of the air purification unit is connected to the fresh air unit. An indoor air inlet and an indoor air outlet are provided on the air purification unit. An outdoor air inlet is provided at one end of the fresh air unit far from the air purification unit. Both the indoor air inlet and the outdoor air inlet can be communicated with the indoor air outlet. The wind valve unit is connected between the air purification unit and the fresh air unit and can regulate the size of the flow path between the outdoor air inlet and the indoor air outlet.

[0006] As a preferred embodiment of the present invention, the air purification unit includes a housing, a centrifugal fan, a volute air duct, and a purification filter element disposed within the housing. The centrifugal fan is disposed within the volute air duct, the purification filter element is annularly sleeved outside the volute air duct, the air inlet of the centrifugal fan is an indoor air inlet, and the indoor air outlet is disposed on the outer side surface of the housing.

[0007] As a preferred embodiment of the present invention, an air duct outlet is disposed on the side surface of the volute air duct, the central angle corresponding to the arc surface of the air duct outlet is less than or equal to 180°, the purification filter element is connected to a driving mechanism, and the driving mechanism can drive the purification filter element to rotate outside the volute air duct so that different positions correspond to the air duct outlet.

[0008] As a preferred embodiment of the present invention, the central angle corresponding to the arc surface of the air duct outlet is 60°.

[0009] As a preferred embodiment of the present invention, it further includes a control circuit board disposed within the housing and a resistance detection unit connected to the control circuit board. The driving mechanism is connected to the control circuit board. The resistance detection unit is used to detect the resistance value of the purification filter element. When the resistance detection unit detects that the resistance of the purification filter element reaches a threshold value, the control circuit board controls the driving mechanism to drive the purification filter element to rotate by an angle equal to the central angle corresponding to the arc surface of the air duct outlet.

[0010] As a preferred embodiment of the present invention, the driving mechanism includes a driving motor and a reduction gear set. A gear ring is disposed on the inner ring of the purification filter element. The driving motor is connected to one side of the reduction gear set, and the other side of the reduction gear set is engaged with the gear ring.

[0011] As a preferred embodiment of the present invention, the fresh air unit includes a pipeline, a wind cap, a primary filter screen, an electric heating heat exchanger, a forward axial flow fan, and a reverse axial flow fan disposed within the pipeline. The outdoor air inlet is disposed on the wind cap. One end of the pipeline is connected to the housing and the other end is connected to the wind cap. The primary filter screen is disposed on the side of the electric heating heat exchanger close to the wind cap, and the forward axial flow fan and the reverse axial flow fan are both disposed on the side of the electric heating heat exchanger close to the housing.

[0012] As a preferred embodiment of the present invention, the air valve unit includes a second motor, a diversion air hood, and a conical air cap. The periphery of the diversion air hood is connected to the purification filter element. On the back side of the conical air cap, a connecting sleeve column and a plurality of guide rods are provided. The connecting sleeve column is disposed at the center of the conical air cap and has internal threads on its inner side. A screw rod is coaxially connected to the output shaft of the second motor, and the screw rod is in threaded cooperation with the connecting sleeve column. The plurality of guide rods are distributed around the conical air cap and are arranged parallel to the connecting sleeve column. A plurality of guide holes corresponding to the guide rods are provided on the diversion air hood, and each guide rod is respectively inserted into one of the guide holes. The second motor can drive the conical air cap to approach or move away from the diversion air hood.

[0013] As a preferred embodiment of the present invention, the air valve unit further includes a sealing rubber ring. A connecting edge is provided around the conical air cap. The connecting edge is annular and perpendicular to the conical axis of the conical air cap. The sealing rubber ring is connected to the side of the connecting edge facing away from the second motor.

[0014] The present invention also provides a working method for a fresh air purification integrated machine, including:

[0015] The air valve is opened, and the reverse axial flow fan operates to discharge indoor air from the indoor air outlet to the outdoor air inlet. The indoor air is heated by the electric heating heat exchanger.

[0016] When the temperature of the electric heating heat exchanger is lower than the cut-off temperature, the air valve is closed, and the electric heating heat exchanger heats up.

[0017] When the electric heating heat exchanger is heated to the specified temperature, the forward axial flow fan operates, and fresh cold outdoor air enters the pipeline through the outdoor air inlet.

[0018] The fresh cold outdoor air is heated to a certain value by the electric heating heat exchanger, the air valve is opened, and it enters the room through the indoor air inlet.

[0019] When the temperature of the electric heating heat exchanger drops to the cut-off temperature, the air valve is closed, the forward axial flow fan stops operating, and the electric heating heat exchanger heats up.

[0020] Compared with the prior art, the present invention has the following positive effects:

[0021] The fresh air purification integrated machine provided by the present invention includes an air purification unit, a fresh air unit and a wind valve unit. One end of the air purification unit is connected to the fresh air unit. An indoor air inlet and an indoor air outlet are provided on the air purification unit. An outdoor air inlet is provided at one end of the fresh air unit away from the air purification unit. Both the indoor air inlet and the outdoor air inlet can communicate with the indoor air outlet. The wind valve unit is connected between the air purification unit and the fresh air unit and can adjust the size of the flow path between the outdoor air inlet and the indoor air outlet. The fresh air purification integrated machine of the present invention can enter the air purification unit through the indoor air inlet and then be sent into the room through the indoor air outlet to filter, sterilize, remove harmful gases such as formaldehyde and TVOC from the indoor air, thereby purifying the indoor air; it can also enter the fresh air unit through the outdoor air inlet and then be sent into the room through the indoor air outlet, thereby sending fresh outdoor air into the room and playing the role of exchanging indoor and outdoor air. And through the wind valve unit, the flow rate of fresh outdoor air sent into the room can be adjusted to control the flow state of the fresh air purification integrated machine for indoor air purification and outdoor air intake. When the wind valve unit completely closes the flow path between the outdoor air inlet and the indoor air inlet, the fresh air purification integrated machine can only purify the indoor air. When the wind valve unit opens the flow path between the outdoor air inlet and the indoor air inlet, the fresh air purification integrated machine can be used for both indoor air purification and outdoor air ventilation, or only for outdoor air ventilation, and the use is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 is an exploded view of the fresh air purification integrated machine of the present invention;

[0024] Figure 2 is a schematic structural diagram of the air purification unit in the present invention;

[0025] Figure 3 is a schematic structural diagram of the driving mechanism in the present invention;

[0026] Figure 4 is a cross-sectional view of the fresh air purification integrated machine of the present invention;

[0027] Figure 5 is a cross-section of the internal structure of the housing in the present invention Figure 1 ;

[0028] Figure 6 Cross-section of the internal structure of the housing in the present invention Figure 2 .

[0029] In the figure: 11, centrifugal fan; 111, indoor air inlet; 12, volute air duct; 121, air duct outlet; 13, purification filter element; 131, gear ring; 14, drive mechanism; 141, drive motor; 142, first gear; 143, second gear; 144, third gear; 145, fourth gear; 15, control circuit board; 21, pipeline; 22, wind cap; 23, primary filter; 25, electric heating heat exchanger; 24, forward axial flow fan; 26, reverse axial flow fan; 27, pipeline flange; 31, guiding air hood; 32, conical wind cap; 321, connecting sleeve column; 322, connecting edge; 323, guiding rod; 33, sealing rubber ring; 341, second motor; 342, screw; 19, housing; 191, annular side plate; 192, bottom plate; 193, connecting cylinder; 194, air inlet; 195, indoor air outlet; 221, outdoor air inlet. Specific embodiments

[0030] In the description of the present invention, it should be noted that unless otherwise specified, the meaning of "a plurality" is two or more; the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should also be noted that unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The following further describes in detail the specific embodiments of the present invention with reference to the drawings.

[0033] Embodiment 1:

[0034] A fresh air purification integrated machine provided in this embodiment, as Figures 1-6As shown, it includes an air purification unit, a fresh air unit, and a damper unit. The air purification unit is connected to one end of the fresh air unit. An indoor air inlet 111 and an indoor air outlet 195 are provided on the air purification unit, and the indoor air inlet 111 and the indoor air outlet 195 are arranged on different surfaces of the air purification unit. An outdoor air inlet 221 is provided at one end of the fresh air unit away from the air purification unit. Both the indoor air inlet 111 and the outdoor air inlet 221 can communicate with the indoor air outlet 195. The damper unit is connected between the air purification unit and the fresh air unit and can regulate the size of the flow path between the outdoor air inlet 221 and the indoor air outlet 195.

[0035] The fresh air purification integrated machine of this embodiment can enter the air purification unit through the indoor air inlet 111 and then be sent into the room through the indoor air outlet 195 to filter, sterilize, remove harmful gases such as formaldehyde and TVOC from the indoor air, thereby purifying the indoor air; it can also enter the fresh air unit through the outdoor air inlet 221 and then be sent into the room through the indoor air outlet 195, thus sending fresh outdoor air into the room and playing the role of exchanging indoor and outdoor air. And through the damper unit, the flow rate of fresh outdoor air sent into the room can be regulated to control the flow rate state of the fresh air purification integrated machine of this embodiment for indoor air purification and outdoor air intake. When the damper unit completely closes the flow path between the outdoor air inlet 221 and the indoor air inlet 111, the fresh air purification integrated machine of this embodiment can only purify the indoor air. When the damper unit opens the flow path between the outdoor air inlet 221 and the indoor air inlet 111, the fresh air purification integrated machine of this embodiment can be used for both indoor air purification and outdoor air ventilation, or only for outdoor air ventilation, making it more flexible to use.

[0036] When installing the fresh air purification integrated machine of this embodiment, the air purification unit is arranged towards the indoor side, and the fresh air unit passes through the wall through a pipeline, and the outdoor air inlet 221 is arranged towards the outdoor. Existing air purifiers are all single machines placed indoors, occupying living space. The fresh air purification integrated machine of this embodiment realizes the invisible embedding of the fresh air machine in the wall, reducing the occupation of indoor space and enabling one device to have the functions of breathing fresh air and purifying air at the same time.

[0037] As a preferred embodiment, as Figure 1 and Figure 2As shown, the air purification unit includes a housing 19 and a centrifugal fan 11, a volute air duct 12, and a purification filter element 13 disposed inside the housing 19. The centrifugal fan 11 is disposed inside the volute air duct 12, and the centrifugal fan 11 is installed on the inner side of the circle of the volute air duct by screws. The purification filter element 13 is sleeved around the outside of the volute air duct 12. Specifically, an installation slideway is provided on the outer periphery of the volute air duct 12, and the purification filter element 13 is sleeved on the circular outer shell slideway of the volute air duct. The volute air duct 12 and the panel volute air duct 12 are integrally installed on the housing by threads. The air inlet of the centrifugal fan 11 is the indoor air inlet 111, and the indoor air outlet 195 is provided on the outer side surface of the housing 19. The air purification unit provides wind power through the centrifugal fan. The centrifugal fan can overcome the high resistance of the purification filter element 13 (usually reaching several hundred pascals) and still output a stable air volume under the resistance. The multi-wing centrifugal fan reduces noise while ensuring the air pressure through optimizing the blade structure, and is more suitable for household scenarios.

[0038] In the air purification unit of this embodiment, wind power is provided by the centrifugal fan 11. Indoor air enters the centrifugal fan 11 through the indoor air inlet 111, is guided to the periphery of the volute air duct 12 through the volute air duct 12, and air filtration, sterilization, removal of harmful gases such as formaldehyde and TVOC are carried out through the purification filter element 13, and then enters the room through the indoor air inlet 111 on the side surface of the housing 19, thereby realizing the purification of indoor air.

[0039] As a preferred embodiment, as Figure 2 shown, an air duct outlet 121 is provided on the side surface of the volute air duct 12, and the central angle corresponding to the arc surface of the air duct outlet 121 is less than or equal to 180°. The purification filter element 13 is connected to a driving mechanism 14, and the driving mechanism 14 can drive the purification filter element 13 to rotate on the outside of the volute air duct 12 so that different positions correspond to the air duct outlet 121. The central angle corresponding to the arc surface of the air duct outlet 121 is greater than or equal to 60°. When the central angle corresponding to the arc surface of the air duct outlet 121 is equal to 180°, the purification filter element 13 can be evenly divided into two parts for use; when the central angle corresponding to the arc surface of the air duct outlet 121 is equal to 90°, the purification filter element 13 can be evenly divided into four parts for use; when the central angle corresponding to the arc surface of the air duct outlet 121 is equal to 60°, the purification filter element 13 can be evenly divided into six parts for use. The above modes can all be realized through intelligent control algorithm software, and the realization methods can be divided into the mode setting method of the panel, the mobile phone APP setting method, and the voice control method.

[0040] In this embodiment, by making the central angle corresponding to the air duct outlet 121 less than or equal to 180°, on the one hand, the wind force can be enhanced, and on the other hand, different positions of the purification filter element 13 can correspond to the air duct outlet 121. When the pollutants at the position of the purification filter element 13 corresponding to the air duct outlet 121 reach the upper limit, the driving mechanism 14 can drive the purification filter element 13 to rotate so that the remaining positions of the purification filter element 13 correspond to the air duct outlet 121, so that the purification filter element 13 can be used evenly, the purification filter element 13 can be fully utilized, the service life of the purification filter element 13 can be extended, and the use cost can be reduced.

[0041] As a preferred embodiment, the central angle corresponding to the arc surface of the air duct outlet is 60°. While ensuring the ventilation effect of air purification, the purification filter element 13 is divided into six parts for use, thus extending the service life.

[0042] As a preferred embodiment, the fresh air purification all-in-one machine of this embodiment further includes a control circuit board 15 arranged in the housing 19 and a resistance detection unit connected to the control circuit board 15. The driving mechanism 14 is connected to the control circuit board 15, and the resistance detection unit is used to detect the resistance value of the purification filter element 13. When the resistance detection unit detects that the resistance of the purification filter element 13 reaches the threshold, it means that the annular filter element of this section is saturated and blocked. The control circuit board 15 controls the driving mechanism 14 to drive the purification filter element 13 to rotate by an angle equal to the central angle corresponding to the arc surface of the air duct outlet. When the central angle α corresponding to the arc surface of the air duct outlet is 60°, the control circuit board 15 controls the driving mechanism 14 to drive the purification filter element 13 to rotate 60°, and the entire purification filter element can be switched 6 times, thus greatly extending the service life of the filter element.

[0043] Preferably, the purification filter element is an expanded graphite and activated carbon fiber composite filter layer filter element, which can effectively filter harmful gases such as formaldehyde and TVOC. The interlayer pores of expanded graphite can capture macromolecular organic substances (such as some TVOC components), and can enhance the gas diffusion efficiency as a carrier, with high temperature resistance and corrosion resistance, and can extend the service life of the filter layer. Compared with single activated carbon, the composite filter layer can increase the TVOC adsorption capacity by 20%-30%. Among them, the activated carbon fiber and expanded graphite are compounded at a volume ratio of 1:2-1:3 to balance the adsorption efficiency and pressure drop. The saturation of the purification filter element can be monitored in real time through the resistance detection unit. When the entire purification filter element reaches saturation, the purification filter element can be replaced, and the replaced old filter element can be exchanged for a new one and regenerated by high-temperature desorption at the manufacturer, thereby reducing the operation cost, and users can obtain low-cost filter element consumables. In this way, the manufacturer can effectively solve the pain points of users.

[0044] As a preferred embodiment, as Figure 3As shown, the driving mechanism 14 includes a driving motor 141 and a reduction gear set, and a gear ring 131 is arranged on the inner ring of the purification filter element 13, the driving motor 141 is connected to one side of the reduction gear set, and the other side of the reduction gear set is meshed with the gear ring 131. Specifically, the reduction gear set includes a first gear 142, a second gear 143, a third gear 144 and a fourth gear 145, the first gear 142 is connected to the output shaft of the driving motor 141, one side of the second gear 143 is meshed with the first gear 142 and the other side is meshed with the third gear 144, the third gear 144 is coaxially connected with the fourth gear 145, and the fourth gear 145 is meshed with the gear ring 131. The circuit board is perpendicular to the axis of the purification filter element 13. The diameters of the second gear 143, the third gear 144 and the fourth gear 145 are all larger than the diameter of the first gear 142, and the number of teeth of the fourth gear 145 is smaller than the number of teeth of the third gear.

[0045] In this embodiment, the reduction gear set is driven by the driving motor 141, which transmits the power to the gear ring 131, and then drives the purification filter element 13 to rotate together, so as to adjust the purification filter element 13 at different positions to correspond to the air duct outlet 121, thereby extending the working time of a single filter element, and balancing the distribution of impurities intercepted by the filter element, thereby improving the overall efficiency and service life of the filter element.

[0046] When the fresh air purification integrated machine of this embodiment is in air purification mode, the centrifugal fan 11 works, and the air enters the interior of the purifier through the indoor air inlet 111 on the panel, and the air is blown into the volute air duct 12 by the centrifugal fan. The air passes through the air duct outlet 121 of the volute air duct and is filtered by the air purification filter element 13. The filter element aligned with the air duct outlet 121 will be subjected to high wind pressure, and a large amount of impurities, bacteria, mites, formaldehyde and TVOC and other harmful gases in the indoor air will be filtered and re-enter the room through the indoor air outlet 195. After long-term use, when the CADR value of the pollutant reaches the limit, the resistance of the purification filter element will change. When the intelligent controller detects that the resistance in the filter reaches the set threshold, it means that the use part of the filter element has reached the end of its life. At this time, the controller automatically sends a command to control the drive motor 141 to rotate, and through the transmission gear transmission, the air purification filter element is controlled to rotate along a circular track. The rotation position is based on the size of the air duct outlet 121. We divide the circular purification filter into 6 equal parts. The factory starting position is fixed. The filter is saturated. Each rotation is 60 degrees. Each rotation is controlled to rotate the unused part of the filter to the position of the volute outlet. Such a circular purification filter can be used 6 times. After 6 times, the system automatically alarms to prompt the user to replace the filter.

[0047] As a preferred embodiment, the fresh air unit includes a duct 21, a wind cap 22, and a primary filter 23, an electric heating heat exchanger 25, a forward axial flow fan 24, and a reverse axial flow fan 26 disposed inside the duct 21. The outdoor air inlet 221 is provided on the wind cap 22. As Figure 1 and Figure 4 shown, one end of the duct 21 is connected to the housing 19 and the other end is connected to the wind cap 22, and the duct and the wind cap are connected by a screw thread. The primary filter 23 is disposed on the side of the electric heating heat exchanger 25 close to the wind cap 22, and the primary filter 23 is fixed by a snap inside the duct. The primary filter 23 can play a role in initially intercepting outdoor pollutants. The electric heating heat exchanger 25 can add a carbon fiber heating function to the filter screen. The electric heating heat exchanger 25 is in a cylindrical structure and is coaxially disposed with the duct 21, which can extend the heating path to quickly heat the air.

[0048] Both the forward axial flow fan 24 and the reverse axial flow fan 26 are disposed on the side of the electric heating heat exchanger 25 close to the housing 19. The forward axial flow fan 24 is used to draw outdoor fresh air into the room; the reverse axial flow fan 26 is used to draw indoor air outdoors. The forward axial flow fan and the reverse axial flow fan are fixed to the housing of the electric heating heat exchanger by long screws.

[0049] Among them, the duct 21 can be formed by connecting multiple duct units, and the number of duct units can be increased or decreased according to the wall thickness. The duct 21 is connected to the housing 19 through a duct flange. The duct flange 27 and the housing 19 are connected by screws.

[0050] Specifically, the housing 19 includes an annular side plate 191, a bottom plate 192, and a connecting cylinder 193. The bottom plate 192 is connected to one side of the annular side plate 191. A centrifugal fan 11 and a panel are installed on the other side of the annular side plate 191. The connecting cylinder 193 is connected to the bottom plate 192, and the connecting cylinder 193 is coaxially disposed with the annular side plate 191. Both the forward axial flow fan 24 and the reverse axial flow fan 26 are installed in the connecting cylinder 193 and are connected to the control circuit board 15.

[0051] Preferably, in the through-wall duct, an expanded graphite gradient filter is additionally installed to intercept allergens such as pollen and dust mites layer by layer through three-stage pore sizes (50μm → 5μm → 0.5μm), and adsorb outdoor pollutants such as ozone (O3).

[0052] As a preferred embodiment, the air valve unit includes a second motor 341, a diversion air hood 31, and a conical wind cap 32. The diversion air hood is installed on the housing by screws. The second motor 341 and the drive motor 141 are installed on the control circuit board 15 by screws, and the control circuit board 15 is installed on the nut column of the diversion air hood 31 by screws. The periphery of the diversion air hood 31 is connected to the purification filter element 13. Specifically, as Figure 5As shown in the figure, a limiting groove is provided around the diversion air hood 31, and a limiting ring is provided on the purification filter element 13. The limiting ring is slidably arranged in the limiting groove.

[0053] A connecting sleeve column 321 and a plurality of guide rods 323 are provided on the back side of the conical wind cap 32. The connecting sleeve column 321 is arranged at the center of the conical wind cap 32 and has internal threads on its inner side. A screw rod 342 is coaxially connected to the output shaft of the second motor 341. The screw rod 342 is in threaded cooperation with the connecting sleeve column 321. The plurality of guide rods 323 are distributed around the conical wind cap 32 and are arranged parallel to the connecting sleeve column 321. A plurality of guide holes corresponding to the guide rods 323 are provided on the diversion air hood 31. Each guide rod 323 is respectively inserted into a guide hole. Preferably, three guide rods 323 are provided, and the three guide rods 323 are evenly distributed around the diversion air hood 31. The second motor 341 can drive the conical wind cap 32 to approach or move away from the diversion air hood, so that the conical wind cap 32 approaches or moves away from the air inlet 194 of the housing 19, thereby regulating the size of the flow path between the outdoor air inlet 221 and the indoor air inlet 111.

[0054] In this embodiment, the second motor 341 drives the screw rod to rotate, and then pushes the conical wind cap 32 to move back and forth. The three guide rods 323 of the conical wind cap extend into its interior through the three guide holes on the diversion air hood, forming a triangular stable structure to ensure the reliable and stable operation of the conical wind cap 32.

[0055] As a preferred embodiment, the air valve unit further includes a sealing rubber ring 33. A connecting edge 322 is provided around the conical wind cap 32. The connecting edge 322 is annular and perpendicular to the conical axis of the conical wind cap 32. The sealing rubber ring 33 is connected to the side of the connecting edge 322 facing away from the second motor 341. When the air valve unit is closed, the connecting edge 322 abuts against the inside of the housing 19 around the air inlet 194. The sealing rubber ring 33 is a silica gel pad, and the sealing rubber ring 33 is pasted on the connecting edge 322, so that when the air valve is closed, the conical wind cap 32 can seal the air inlet 194 of the housing 19.

[0056] The fresh air purification integrated machine of this embodiment includes an air inlet mode. The air inlet mode includes that when the outdoor temperature is lower than the indoor temperature, the air valve is in a fully closed state. The heating heat exchanger heating device works, and the heating heat exchanger heats up. When the temperature in the heating heat exchanger reaches the set value, the positive axial flow fan works. The outdoor air passes through the primary filter and the heat exchanger, absorbing the heat in the heat exchanger. When the temperature of the fresh cold air reaches the set value, the air valve automatically opens, and the fresh air with a certain temperature enters the room. When the temperature of the heat exchanger drops to the set cut-off temperature, the air valve rotates to the closed state, the positive axial flow fan stops working, and the heat exchanger continues to heat. One air intake cycle is completed.

[0057] It also includes an exhaust air mode. The intake air mode includes opening the air valve and operating the reverse axial flow fan. The old indoor air is discharged to the outside through the indoor air outlet, the heating heat exchanger, and the primary filter.

[0058] This embodiment also provides a working method for a fresh air purification integrated machine, including:

[0059] Open the air valve and operate the reverse axial flow fan 26 to discharge the indoor air to the outdoor air inlet 221 through the indoor air outlet 195. The indoor air exchanges heat through the electric heating heat exchanger 25. The indoor air can play a role in initially heating the electric heating heat exchanger 25, so as to save electricity and be more environmentally friendly.

[0060] When the temperature of the electric heating heat exchanger 25 is less than the cut-off temperature T1, close the air valve and heat the electric heating heat exchanger 25;

[0061] Heat the electric heating heat exchanger 25 to the specified temperature T2, and operate the forward axial flow fan 24. The fresh cold outdoor air enters the pipeline 21 through the outdoor air inlet 221. The specified temperature T2 is greater than the cut-off temperature T1. Specifically, a heat exchanger temperature sensor is provided on the electric heating heat exchanger 25 to detect the real-time temperature of the electric heating heat exchanger 25, and the heat exchanger temperature sensor is electrically connected to the control circuit board.

[0062] The fresh cold outdoor air is heated to a certain value T3 through the electric heating heat exchanger 25, open the air valve, and enter the room through the indoor air inlet 111; T3 is less than T2. Specifically, an air temperature sensor is provided in the pipeline on the side of the electric heating heat exchanger 25 close to the housing to detect the air temperature, and the heat exchanger temperature sensor is electrically connected to the control circuit board.

[0063] When the temperature of the electric heating heat exchanger 25 drops to the cut-off temperature T1, close the air valve, stop the operation of the forward axial flow fan 24, and heat the electric heating heat exchanger 25. Complete a breathing cycle.

[0064] The electric heating heat exchanger 25 can also play a role in defrosting.

[0065] The above working method is the breathing mode of the fresh air purification integrated machine. The above operation scenario is assumed to be the operation mode of the equipment under the complex environmental state in the cold winter in the north.

[0066] The above is only the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can make several deformations and improvements without departing from the creative concept of the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. A fresh air purification integrated machine, characterized in that, It includes an air purification unit, a fresh air unit and a damper unit. The air purification unit is connected to one end of the fresh air unit. An indoor air inlet (111) and an indoor air outlet (195) are provided on the air purification unit. An outdoor air inlet (221) is provided at one end of the fresh air unit far from the air purification unit. Both the indoor air inlet (111) and the outdoor air inlet (221) can communicate with the indoor air outlet (195). The damper unit is connected between the air purification unit and the fresh air unit and can regulate the size of the flow path between the outdoor air inlet (221) and the indoor air outlet (195).

2. The fresh air purification integrated machine according to claim 1, characterized in that, The air purification unit includes a housing (19), a centrifugal fan (11), a volute air duct (12) and a purification filter element (13) arranged in the housing (19). The centrifugal fan (11) is arranged in the volute air duct (12). The purification filter element (13) is sleeved around the outside of the volute air duct (12) in a ring shape. The air inlet of the centrifugal fan (11) is the indoor air inlet (111). The indoor air outlet (195) is arranged on the outer side surface of the housing (19).

3. The fresh air purification integrated machine according to claim 2, wherein An air duct outlet is provided on the side surface of the volute air duct (12). The central angle corresponding to the arc surface of the air duct outlet is less than or equal to 180°. The purification filter element (13) is connected to a driving mechanism (14). The driving mechanism (14) can drive the purification filter element (13) to rotate outside the volute air duct (12) so that different positions correspond to the air duct outlet.

4. The fresh air purification integrated machine according to claim 3, characterized in that, The central angle corresponding to the arc surface of the air duct outlet is 60°.

5. The fresh air purification integrated machine according to claim 3, characterized in that, It also includes a control circuit board (15) arranged in the housing (19) and a resistance detection unit connected to the control circuit board (15). The driving mechanism (14) is connected to the control circuit board (15). The resistance detection unit is used to detect the resistance value of the purification filter element (13). When the resistance detection unit detects that the resistance of the purification filter element (13) reaches the threshold, the control circuit board (15) controls the driving mechanism (14) to drive the purification filter element (13) to rotate by an angle equal to the central angle corresponding to the arc surface of the air duct outlet.

6. The fresh air purification integrated machine according to claim 3, characterized in that, The driving mechanism (14) includes a driving motor (141) and a reduction gear set. A gear ring (131) is arranged on the inner ring of the purification filter element (13). The driving motor (141) is connected to one side of the reduction gear set. The other side of the reduction gear set meshes with the gear ring (131).

7. The fresh air purification integrated machine according to claim 2, wherein The fresh air unit includes a duct (21), a wind cap, a primary filter (23), an electric heating heat exchanger (25), a forward axial flow fan (24) and a reverse axial flow fan (26) arranged in the duct (21). The outdoor air inlet (221) is arranged on the wind cap. One end of the duct (21) is connected to the housing (19) and the other end is connected to the wind cap. The primary filter (23) is arranged on the side of the electric heating heat exchanger (25) close to the wind cap. The forward axial flow fan (24) and the reverse axial flow fan (26) are both arranged on the side of the electric heating heat exchanger (25) close to the housing (19).

8. The fresh air purification integrated machine according to claim 2, characterized in that, The air valve unit includes a second motor (341), a diversion air hood (31) and a conical wind cap (32). The periphery of the diversion air hood (31) is connected to the purification filter element (13). On the back side of the conical wind cap (32), a connecting sleeve column (321) and a plurality of guide rods (323) are arranged. The connecting sleeve column (321) is arranged at the center of the conical wind cap (32) and has internal threads on its inner side. A screw rod (342) is coaxially connected to the output shaft of the second motor (341). The screw rod (342) is in threaded cooperation with the connecting sleeve column (321). The plurality of guide rods (323) are distributed around the conical wind cap (32) and are arranged parallel to the connecting sleeve column (321). A plurality of guide holes corresponding to the guide rods (323) are arranged on the diversion air hood (31). Each guide rod (323) is respectively inserted into one of the guide holes. The second motor (341) can drive the conical wind cap (32) to approach or move away from the diversion air hood.

9. The fresh air purification integrated machine according to claim 8, characterized in that, The air valve unit further includes a sealing rubber ring (33). A connecting edge (322) is provided around the conical wind cap (32). The connecting edge (322) is annular and perpendicular to the conical axis of the conical wind cap (32). The sealing rubber ring (33) is connected to the side of the connecting edge (322) of the conical wind cap (32) facing away from the second motor (341).

10. A working method of a fresh air purification all-in-one machine, comprising: The air valve is opened, the reverse axial flow fan (26) works, and indoor air is discharged from the indoor air outlet (195) to the outdoor air inlet (221), and the indoor air exchanges heat through the electric heating heat exchanger (25). When the temperature of the electric heating heat exchanger (25) is lower than the cut-off temperature, the air valve is closed and the electric heating heat exchanger (25) is heated. When the electric heating heat exchanger (25) is heated to the specified temperature, the forward axial flow fan (24) works, and fresh cold outdoor air enters the duct (21) through the outdoor air inlet (221). The fresh cold outdoor air is heated to a certain value by the electric heating heat exchanger (25), the air valve is opened, and it enters the room through the indoor air inlet (111). When the temperature of the electric heating heat exchanger (25) drops to the cut-off temperature, the air valve is closed, the forward axial flow fan (24) stops working, and the electric heating heat exchanger (25) is heated.

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