CN118775990A - A fresh air ventilator - Google Patents

Abstract

The present invention belongs to the technical field of fresh air ventilation, and specifically is a fresh air ventilator, including a ventilation case; the interior of the ventilation case is respectively provided with an air inlet cavity and an air outlet cavity; the interior of the ventilation case is fixedly connected with an electric cylinder; the output end of the electric cylinder is fixedly connected with a connecting plate; a plurality of ventilation holes are respectively provided on a switching plate, and when it is necessary to filter the air during the ventilation process, the ventilation holes are used to filter the air, and when it is not necessary to filter the air, the ventilation holes are directly used for ventilation, and the filter assembly can be switched for ventilation according to different air qualities, thereby improving the ventilation effect, and the rotation of the spiral fan blades is used to accelerate the gas flow inside the ventilation case and increase the ventilation speed, and the outer wall of the filter is scraped by a shovel plate to reduce the attachment of impurities to the outer wall of the filter, and the pressing plate is used to squeeze the gas inside the air cylinder and send it to the exhaust plate for spraying, thereby playing a role of secondary cleaning of the outside of the filter.

Description

A fresh air ventilator

Technical Field

The invention belongs to the technical field of fresh air ventilation, in particular to a fresh air ventilator.

Background Art

A fresh air ventilator is a machine used for ventilation in a closed room. Usually, it supplies air on one side of the room and draws air on the other side. It relies on mechanical air supply and air extraction to form a fresh air flow field in the system, keeping the indoor air clean and fresh.

A patent application with publication number CN109827281A discloses a fresh air ventilator, including a casing, a top plate, a heat exchange core, a blower and an exhaust fan; the top plate cover is arranged at the top opening of the casing, and isolated fresh air duct and sewage air duct are arranged in the casing; the fresh air ventilator provided in this application can facilitate the installation of the heat exchange core in the casing of the fresh air ventilator, thereby improving the sealing effect between the heat exchange core and the casing.

The above-mentioned fresh air ventilator can seal the gap between the heat exchange core and the mounting ridge by means of the Y-shaped sealing gasket, thereby improving the sealing effect between the heat exchange core and the casing. Current fresh air ventilators usually have a filter assembly to filter the exchanged air, but when the outdoor air quality is good, there is no need to filter the air, resulting in the presence of the filter assembly easily affecting the ventilation effect of the fresh air ventilator.

To this end, the present invention provides a fresh air ventilator.

Summary of the invention

In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

The technical solution adopted by the present invention to solve its technical problems is: a fresh air ventilator described in the present invention includes a ventilation case; an air inlet cavity and an air outlet cavity are respectively opened inside the ventilation case; an electric cylinder is fixedly connected to the inside of the ventilation case; a connecting plate is fixedly connected to the output end of the electric cylinder; switching plates are respectively installed at the four corners of the connecting plate, and the four switching plates are respectively arranged at the air inlet cavity and the air outlet cavity in pairs; two ventilation holes are opened on the inner walls of the four switching plates, and the two ventilation holes are vertically arranged; filters are fixedly connected to the inner walls of the four switching plates and at the ventilation holes located below.

Preferably, a fixing frame is fixedly connected to the inner walls of the four switching plates and the ventilation holes located above; and a spiral fan blade is rotatably connected to the middle inner wall of the fixing frame.

Preferably, two collecting grooves are provided inside the ventilation case, and the two collecting grooves are respectively located at the front air inlet of the air inlet cavity and the front air outlet of the air outlet cavity; a shovel plate is fixedly connected to the inner wall of the ventilation case near the collecting grooves, and the shovel plate fits the outer wall of the switching plate; a ramp plate is fixedly connected to the interior of the ventilation case near the shovel plate, and the ramp plate is located below the switching plate.

Preferably, an air cylinder is fixedly connected to the interior of the ventilation box; a pressing plate is slidably connected to the interior of the air cylinder; a connecting block is fixedly connected to the top end of the pressing plate, and the end of the connecting block away from the pressing plate is fixedly connected to the connecting plate; a plurality of No. 1 air pipes are fixedly connected to the outside of the air cylinder; an exhaust plate is fixedly connected to the outside of the top end of the shovel plate, and the exhaust plate can be connected to the interior of the air cylinder through the No. 1 air pipe.

Preferably, a heat retaining plate is fixedly connected to the top of the connecting plate and near the front air outlet of the air outlet cavity; the heat retaining plate is made of metal; a sliding groove is opened on the outside of the switching plate, and the connecting plate is slidably connected to the sliding groove.

Preferably, arc-shaped plates are fixedly connected to both sides of the heat retaining plate; the arc-shaped plates are made of metal.

Preferably, a fixing rod is fixedly connected to the inner wall of the heat retaining plate; a cotton block is fixedly connected to the outside of the fixing rod; and a water tank is provided on the inner wall of the heat retaining plate and below the cotton block.

Preferably, a water cavity is provided inside the heat retaining plate and above the cotton block; a flow transfer cavity is provided inside the heat retaining plate and at the bottom of the water cavity; a No. 1 connecting pipe is connected between the water cavity and the flow transfer cavity; a No. 2 connecting pipe is connected between the cotton block and the flow transfer cavity; a spiral tube is fixedly connected to one end of the No. 2 connecting tube away from the flow transfer cavity, and a plurality of flow holes are provided on the outside of the spiral tube.

Preferably, the inner wall of the air cylinder is slidably connected to a partition; the bottom end of the partition is fixedly connected to an elastic member; the outside of the air cylinder is fixedly connected to a No. 2 air pipe, and the end of the No. 2 air pipe away from the air cylinder is connected to the interior of the heat retention plate; the inner wall of the transfer chamber is slidably connected to an extrusion plate.

Preferably, a connecting rod is fixedly connected to the top end of the extrusion plate; a conical block is fixedly connected to the top end of the connecting rod, and the conical block is arranged corresponding to the diameter of the No. 1 connecting pipe.

The beneficial effects of the present invention are as follows:

1. The fresh air ventilator described in the present invention has multiple ventilation holes respectively opened on the switching plate. When it is necessary to filter the air during the ventilation process, the ventilation holes are used with filters for filtering. When it is not necessary to filter the air, the ventilation holes are directly used for ventilation. The filter components can be switched for ventilation according to different air qualities, thereby improving the ventilation effect. The rotation of the spiral fan blades is used to accelerate the gas flow inside the ventilation box and increase the ventilation speed. The outer wall of the filter is scraped by a shovel plate to reduce the adhesion of impurities on the outer wall of the filter. The pressing plate is used to squeeze the gas inside the air cylinder and send it to the exhaust plate for spraying, thereby playing a role of secondary cleaning of the outside of the filter.

2. The fresh air ventilator described in the present invention conducts the heat discharged between indoor and outdoor through the heat retention plate, thereby recovering the heat discharged to the outside. It cooperates with two arc plates to guide the hot air to improve the heat recovery effect. It utilizes the moisture attached to the cotton block. The moisture is heated by the heat on the heat retention plate to increase the humidity, and the circulating wind sends the humidity into the room to humidify the indoor air. It utilizes the transfer chamber to temporarily store part of the water in the water chamber. The extrusion plate is pushed up by the gas, and the conical block is inserted into the inside of the No. 1 connecting pipe for sealing. The extrusion plate slides and squeezes the water in the transfer chamber to the spiral tube and evenly adheres to the cotton block, thereby improving the humidification effect on the room.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings.

Fig. 1 is a perspective view of the present invention;

FIG2 is a partial structural cross-sectional view of the ventilation chassis of the present invention;

FIG3 is a schematic diagram of the structure of the sliding groove in the present invention;

FIG4 is a schematic diagram of the structure of the switch board in the present invention;

FIG5 is a schematic diagram of the structure of the heat retaining plate in the present invention;

FIG. 6 is a schematic diagram of the structure of the spiral tube in the present invention.

In the figure: 1. ventilation chassis; 12. electric cylinder; 13. connecting plate; 14. switching plate; 15. filter; 16. ventilation hole; 2. fixing frame; 21. spiral fan blade; 3. collecting tank; 31. shovel plate; 32. ramp plate; 4. air cylinder; 41. pressing plate; 42. connecting block; 43. No. 1 air pipe; 44. exhaust plate; 5. heat retention plate; 51. sliding groove; 6. arc plate; 7. fixing rod; 71. cotton block; 72. water tank; 8. water cavity; 81. flow transfer cavity; 82. No. 1 connecting pipe; 83. No. 2 connecting pipe; 84. spiral tube; 9. partition; 91. elastic part; 92. No. 2 air pipe; 93. extrusion plate; 95. connecting rod; 96. conical block.

DETAILED DESCRIPTION

In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

As shown in Figures 1 to 4, a fresh air ventilator described in an embodiment of the present invention comprises a ventilator case 1; an air inlet cavity and an air outlet cavity are respectively provided inside the ventilator case 1; an electric cylinder 12 is fixedly connected to the inside of the ventilator case 1; a connecting plate 13 is fixedly connected to the output end of the electric cylinder 12; switching plates 14 are respectively installed at the four corners of the connecting plate 13, and four switching plates 14 are respectively arranged at the air inlet cavity and the air outlet cavity in pairs; two ventilation holes 16 are provided on the inner walls of the four switching plates 14, and the two ventilation holes 16 are vertically arranged; filters 15 are fixedly connected to the inner walls of the four switching plates 14 and at the ventilation holes 16 located below; when the fresh air ventilator is used to ventilate the room, the air inlet cavity and the air outlet cavity inside the ventilator case 1 will be respectively installed with wind systems, which are used to draw air from the air inlet cavity and The air outlet cavity supplies air, and the air inlet cavity draws air into the interior of the ventilation chassis 1. At this time, multiple filters 15 correspond to the air inlet cavity and the air outlet cavity respectively. The filters 15 on the multiple switching plates 14 filter impurities in the incoming air and discharge the purified air into the room. At the same time, the air outlet cavity also extracts turbid gas in the room and discharges it to the outside, thereby improving the indoor air quality. In the early morning or when the outdoor air quality is good, the output end of the electric cylinder 12 of the fresh air ventilator extends downward, driving the connecting plate 13 and the switching plates 14 at the four corners of the connecting plate 13 to slide down synchronously. At this time, multiple ventilation holes 16 correspond to the air inlet cavity and the air outlet cavity respectively. Relying on the wind system, good outdoor air can be directly and quickly introduced into the room, replacing the filter component of the traditional fresh air ventilator. The operation of the filter component can be changed according to the outdoor air quality, thereby improving the ventilation effect of the fresh air ventilator.

The inner walls of the four switching plates 14 and the ventilation holes 16 located above are fixedly connected with a fixing frame 2; the middle inner wall of the fixing frame 2 is rotatably connected with a spiral fan blade 21; when the room is ventilated, the wind system is used to draw air into the air inlet cavity. At this time, the ventilation holes 16 correspond to the air inlet cavity, and the wind drives the spiral fan blades 21 on the multiple fixing frames 2 to rotate. The rotation of the spiral fan blades 21 assists in exhausting air and accelerates the flow speed of air inside the ventilation chassis 1. Similarly, the wind system supplies air to the air outlet cavity for external discharge. The rotation of the spiral fan blades 21 accelerates the discharge speed of turbid gas in the room, playing a role in assisting in drawing and supplying air.

Two collecting grooves 3 are provided inside the ventilation box 1, and the two collecting grooves 3 are respectively located at the front air inlet of the air inlet cavity and the front air outlet of the air outlet cavity; a shovel plate 31 is fixedly connected to the inner wall of the ventilation box 1 near the collecting groove 3, and the shovel plate 31 is attached to the outer wall of the switching plate 14; a ramp plate 32 is fixedly connected to the inner wall of the ventilation box 1 near the shovel plate 31, and the ramp plate 32 is located below the switching plate 14; when the filter 15 filters impurities in the air for a long time, the impurities adhere to the filter When the outer wall of filter screen 15 is blocked, a shovel plate 31 is fixed at the collecting tank 3 inside the ventilation chassis 1. As the switching plate 14 drives the filter screen 15 to slide down, the shovel plate 31 can scrape the outer wall of the filter screen 15, thereby reducing the adhesion of impurities on the outer wall of the filter screen 15. The impurities dropped by the scraper fall into the collecting tank 3 for collection. The ramp plate 32 is used to separate the switching plate 14 from the collecting tank 3, reducing the number of impurities that fall under the switching plate 14 and affect sliding, thereby cleaning the outer wall of the filter screen 15 and improving the filtering effect.

As shown in Figures 1, 2 and 4, an air cylinder 4 is fixedly connected to the interior of the ventilation chassis 1; a pressing plate 41 is slidably connected to the interior of the air cylinder 4; a connecting block 42 is fixedly connected to the top of the pressing plate 41, and the end of the connecting block 42 away from the pressing plate 41 is fixedly connected to the connecting plate 13; a plurality of No. 1 air pipes 43 are fixedly connected to the outside of the air cylinder 4; an exhaust plate 44 is fixedly connected to the outside of the top of the shovel plate 31, and the exhaust plate 44 can be connected to the interior of the air cylinder 4 through the No. 1 air pipe 43; when the outer wall of the filter 15 is cleaned, the electric cylinder 12 is used to drive the connecting plate 13 to slide down, and the connecting block 42 at the bottom of the connecting plate 13 cooperates with the pressing plate 41 to squeeze the gas inside the air cylinder 4, and the gas inside the air cylinder 4 is respectively sent to the two shovel plates 31 by the two No. 1 air pipes 43, and is obliquely ejected from the two exhaust plates 44, and the ejected gas can secondary clean the outer wall of the filter 15 after scraping, thereby improving the ventilation effect of the fresh air ventilator.

As shown in Figures 1 to 6, a heat retaining plate 5 is fixedly connected to the top of the connecting plate 13 and near the front air outlet of the air outlet cavity; the material of the heat retaining plate 5 is metal; a sliding groove 51 is opened on the outside of the switching plate 14, and the connecting plate 13 is slidably connected to the sliding groove 51; when the indoor temperature is higher than the outdoor temperature in cold weather, fresh air ventilation easily causes a lot of indoor heat to be discharged and wasted, and the heat retaining plate 5 is fixed to the end of the connecting plate 13. As the connecting plate 13 continues to slide down, after the switching plate 14 stops sliding, the connecting plate 13 still slides down in the sliding groove 51 until the heat retaining plate 5 slides down and connects to the air inlet cavity and the air outlet cavity. The metal material of the heat retaining plate 5 can absorb the indoor heat discharged from the air outlet cavity, and conduct the heat to the air inlet cavity through the heat retaining plate 5, which can assist in heating the gas introduced into the air inlet cavity, thereby reducing the waste of indoor heat.

As shown in Figures 1 to 5, curved plates 6 are fixed on both sides of the heat retaining plate 5; the curved plates 6 are made of metal; when recovering the indoor heat, two curved plates 6 are respectively fixed on both sides of the heat retaining plate 5, and the curved surfaces of the curved plates 6 can intercept part of the exhaust gas. The metal material of the curved plates 6 allows the heat on the gas to be conducted to the heat retaining plate 5 faster and more, and then the curved plate 6 on the other side guides the heat to mix with the introduced gas, thereby improving the heat recovery effect.

As shown in Figures 4 to 6, the inner wall of the heat retaining plate 5 is fixedly connected with a fixing rod 7; the outside of the fixing rod 7 is fixedly connected with a cotton block 71; the inner wall of the heat retaining plate 5 and below the cotton block 71 is provided with a water tank 72; when part of the heat discharged to the outside is recovered, the fixing rod 7 is used to cooperate with the cotton block 71 to be fixed to the inner wall of the heat retaining plate 5, and water can be sprayed on the cotton block 71. The cotton block 71 is blown by the recovered heat and a small amount of circulating air, and the moisture generated by the water on the cotton block 71 is mixed with the introduced gas to enter the room, thereby increasing the humidity in the room and improving the indoor air quality.

A water chamber 8 is provided inside the heat retaining plate 5 and above the cotton block 71; a transfer chamber 81 is provided inside the heat retaining plate 5 and at the bottom of the water chamber 8; a No. 1 connecting pipe 82 is connected between the water chamber 8 and the transfer chamber 81; a No. 2 connecting pipe 83 is connected between the cotton block 71 and the transfer chamber 81; a spiral tube 84 is fixedly connected to one end of the No. 2 connecting tube 83 away from the transfer chamber 81, and a plurality of flow holes are provided on the outside of the spiral tube 84; when the indoor humidity is increased, water is filled into the water chamber 8, and the water in the water chamber 8 is introduced into the transfer chamber 81 by the No. 1 connecting pipe 82 for temporary storage. As the water in the transfer chamber 81 gradually increases, the water flows from the No. 2 connecting pipe 83 to the spiral tube 84, and then flows out from the plurality of flow holes on the spiral tube 84, and the water is evenly attached to the cotton block 71, thereby improving the effect of increasing the indoor humidity.

The inner wall of the gas cylinder 4 is slidably connected with a partition 9; the bottom end of the partition 9 is fixedly connected with an elastic member 91; the outside of the gas cylinder 4 is fixedly connected with a No. 2 gas pipe 92, and the end of the No. 2 gas pipe 92 away from the gas cylinder 4 is connected to the inside of the heat retention plate 5; the inner wall of the transfer chamber 81 is slidably connected with an extrusion plate 93; when water flows into the cotton block 71 from the transfer chamber 81, the partition 9 is squeezed by sliding down on the pressing plate 41, and the elastic member 91 elastically contracts, and the partition 9 presses part of the gas at the bottom of the gas cylinder 4 into the No. 2 gas pipe 92, and the gas is delivered to the inside of the heat retention plate 5 by the No. 2 gas pipe 92, and the extrusion plate 93 is pushed upward to slide and squeeze the water in the transfer chamber 81, and the water is pressed into the spiral tube 84 from the No. 2 connecting pipe 83, thereby accelerating the uniform diffusion of water.

A connecting rod 95 is fixedly connected to the top of the extrusion plate 93; a conical block 96 is fixedly connected to the top of the connecting rod 95, and the conical block 96 is set corresponding to the diameter of the No. 1 connecting pipe 82; when the water temporarily stored in the counterflow chamber 81 is squeezed into the spiral tube 84, the extrusion plate 93 is pushed by the gas introduced into the No. 2 air pipe 92, and the extrusion plate 93 drives the conical block 96 at the top of the connecting rod 95 to directly insert into the No. 1 connecting pipe 82, so that the interior of the No. 1 connecting pipe 82 is blocked by the conical block 96, and the extrusion plate 93 continuously squeezes the water inside the counterflow chamber 81 upward, so that the water in the counterflow chamber 81 can enter the interior of the spiral tube 84 quantitatively and separately. After the conical block 96 is reset, the water inside the water chamber 8 still flows down from the No. 1 connecting pipe 82 to the counterflow chamber 81 for quantitative temporary storage, thereby playing a role in quantitative water delivery in the spiral tube 84.

Working process: when using the fresh air ventilator to ventilate the room, the air inlet cavity and the air outlet cavity inside the ventilation box 1 will be installed with wind systems respectively. The wind systems are used to draw air from the air inlet cavity and supply air to the room. The air inlet cavity draws air into the interior of the ventilation box 1. At this time, multiple filters 15 correspond to the air inlet cavity and the air outlet cavity respectively. The filters 15 on the multiple switching plates 14 filter impurities from the incoming air and discharge the purified air into the room. At the same time, the air outlet cavity also extracts turbid gas from the room and discharges it outside, thereby improving the indoor air quality. In the early morning or when the outdoor air quality is good, the output end of the electric cylinder 12 of the fresh air ventilator extends downward, driving the connecting plate 13 and the switching plates 14 at the four corners of the connecting plate 13 to slide down synchronously. At this time, multiple ventilation holes 14 are connected to the ventilation box 1. The air holes 16 correspond to the air inlet cavity and the air outlet cavity respectively. The wind system can directly and quickly introduce good outdoor air into the room, replacing the filter component of the traditional fresh air ventilator. The operation of the filter component can be changed according to the outdoor air quality, thereby improving the ventilation effect of the fresh air ventilator. When ventilating the room, the wind system is used to draw air into the air inlet cavity. At this time, the ventilation holes 16 correspond to the air inlet cavity, and the wind drives the spiral blades 21 on the multiple fixing frames 2 to rotate. The rotation of the spiral blades 21 assists in exhausting air and accelerates the flow speed of air inside the ventilation box 1. Similarly, the wind system supplies air to the air outlet cavity for external discharge. The rotation of the spiral blades 21 accelerates the discharge speed of turbid gas in the room, playing a role of assisting in air induction and air supply.

When the filter 15 filters impurities in the air for a long time and the impurities adhere to the outer wall of the filter 15 and cause blockage, the shovel plate 31 is fixed at the collecting groove 3 inside the ventilation chassis 1. As the switching plate 14 drives the filter 15 to slide down, the shovel plate 31 can scrape the outer wall of the filter 15, thereby reducing the attachment of impurities to the outer wall of the filter 15. The impurities dropped by the scraper fall into the collecting groove 3 for collection. The ramp plate 32 is used to separate the switching plate 14 from the collecting groove 3, reduce the impurities falling under the switching plate 14 and affecting the sliding, and play a role in cleaning the outer wall of the filter 15 and improving the filtering effect; when the outer wall of the filter 15 is cleaned, the electric cylinder 12 is used to drive the connecting plate 13 to slide down, and the connecting block 42 at the bottom of the connecting plate 13 cooperates with the pressing plate 41 to squeeze the gas inside the air cylinder 4. The gas inside the air cylinder 4 is respectively sent to the two shovel plates 31 by the two No. 1 air pipes 43, and is obliquely ejected from the two exhaust plates 44. The ejected gas can secondary clean the outer wall of the filter 15 after scraping, thereby improving the fresh air exchange The ventilation effect of the air machine; when the indoor temperature is higher than the outdoor temperature on cold days, fresh air ventilation easily causes a lot of indoor heat to be wasted by exhausting. The heat retaining plate 5 is fixed to the end of the connecting plate 13. As the connecting plate 13 continues to slide down, after the switching plate 14 stops sliding, the connecting plate 13 still slides down at the sliding groove 51 until the heat retaining plate 5 slides down and is connected to the air inlet cavity and the air outlet cavity. The metal material of the heat retaining plate 5 can absorb the indoor heat discharged from the air outlet cavity, and conduct the heat to the air inlet cavity through the heat retaining plate 5, which can assist in heating the gas introduced into the air inlet cavity, thereby reducing the waste of indoor heat discharge; when recovering indoor heat, two arc plates 6 are respectively fixed on both sides of the heat retaining plate 5, and the arc surface of the arc plate 6 can intercept part of the exhaust gas, and the metal material of the arc plate 6 can make the heat on the gas conduct faster and more to the heat retaining plate 5, and then the arc plate 6 on the other side is guided to mix the heat with the introduced gas, thereby improving the heat recovery effect;

When part of the heat discharged to the outside is recovered, the fixing rod 7 is used to cooperate with the cotton block 71 to be fixed on the inner wall of the heat retaining plate 5. Water can be sprayed on the cotton block 71. The recovered heat and a small amount of circulating air are used to blow on the cotton block 71, and the moisture generated by the water on the cotton block 71 is mixed with the introduced gas to enter the room, which plays a role in increasing the humidity in the room and improving the indoor air quality; when the humidity in the room is increased, water is filled in the water chamber 8, and the water in the water chamber 8 is introduced into the transfer chamber 81 by the No. 1 connecting pipe 82 for temporary storage. As the water in the transfer chamber 81 gradually increases, the water flows from the No. 2 connecting pipe 83 to the spiral tube 84, and then flows out from the multiple flow holes on the spiral tube 84. The water is evenly attached to the cotton block 71, thereby improving the effect of increasing the indoor humidity; when the water flows into the cotton block 71 from the transfer chamber 81, the pressing plate 41 is used to slide down and squeeze the partition 9, the elastic member 91 elastically contracts, and the partition 9 presses the bottom of the air cylinder 4 Part of the gas at the end is pressed into the No. 2 gas pipe 92, and the gas is delivered to the interior of the heat retaining plate 5 by the No. 2 gas pipe 92, and pushes the extrusion plate 93 to slide up and squeeze the water in the transfer flow chamber 81, and presses the water from the No. 2 connecting pipe 83 into the spiral tube 84, thereby accelerating the uniform diffusion effect of the water; when the water temporarily stored in the transfer flow chamber 81 is squeezed into the spiral tube 84, the extrusion plate 93 is pushed by the gas introduced into the No. 2 gas pipe 92, and the extrusion plate 93 drives the conical block 96 at the top of the connecting rod 95 to be directly inserted into the No. 1 connecting pipe 82, so that the interior of the No. 1 connecting pipe 82 is blocked by the conical block 96, and the extrusion plate 93 continuously squeezes the water inside the transfer flow chamber 81 upward, so that the water in the transfer flow chamber 81 can quantitatively and separately enter the interior of the spiral tube 84, and after the conical block 96 is reset, the water inside the water chamber 8 still flows down from the No. 1 connecting pipe 82 to the transfer flow chamber 81 for quantitative temporary storage, which plays a role in quantitative water delivery in the spiral tube 84.

The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims (10)

1. A fresh air ventilator, characterized in that: it comprises a ventilator case (1); an air inlet cavity and an air outlet cavity are respectively provided inside the ventilator case (1); an electric cylinder (12) is fixedly connected inside the ventilator case (1); an output end of the electric cylinder (12) is fixedly connected to a connecting plate (13); switching plates (14) are respectively installed at four corners of the connecting plate (13), and four switching plates (14) are respectively arranged at the air inlet cavity and the air outlet cavity in pairs; two ventilation holes (16) are provided on the inner walls of the four switching plates (14), and the two ventilation holes (16) are arranged vertically; and filters (15) are fixedly connected to the inner walls of the four switching plates (14) and at the ventilation holes (16) located below. 2. A fresh air ventilator according to claim 1, characterized in that: a fixing frame (2) is fixedly connected to the inner wall of the four switching plates (14) and at the ventilation holes (16) located above; and a spiral fan blade (21) is rotatably connected to the middle inner wall of the fixing frame (2). 3. A fresh air ventilator according to claim 1, characterized in that: two collecting grooves (3) are provided inside the ventilation box (1), and the two collecting grooves (3) are respectively located at the front air inlet of the air inlet cavity and the front air outlet of the air outlet cavity; a shovel plate (31) is fixedly connected to the inner wall of the ventilation box (1) near the collecting groove (3), and the shovel plate (31) fits the outer wall of the switching plate (14); a ramp plate (32) is fixedly connected to the inside of the ventilation box (1) near the shovel plate (31), and the ramp plate (32) is located below the switching plate (14). 4. A fresh air ventilator according to claim 3, characterized in that: an air cylinder (4) is fixedly connected to the inside of the ventilation chassis (1); a pressing plate (41) is slidably connected to the inside of the air cylinder (4); a connecting block (42) is fixedly connected to the top end of the pressing plate (41), and the end of the connecting block (42) away from the pressing plate (41) is fixedly connected to the connecting plate (13); a plurality of No. 1 air pipes (43) are fixedly connected to the outside of the air cylinder (4); an exhaust plate (44) is fixedly connected to the outside of the top end of the shovel plate (31), and the exhaust plate (44) can be connected to the inside of the air cylinder (4) through the No. 1 air pipe (43). 5. A fresh air ventilator according to claim 4, characterized in that: a heat retaining plate (5) is fixedly connected to the top of the connecting plate (13) and close to the front air outlet of the air outlet cavity; the heat retaining plate (5) is made of metal; a sliding groove (51) is provided on the outside of the switching plate (14), and the connecting plate (13) is slidably connected to the sliding groove (51). 6. A fresh air ventilator according to claim 5, characterized in that: arc-shaped plates (6) are fixedly connected to both sides of the heat retention plate (5); and the material of the arc-shaped plates (6) is metal. 7. A fresh air ventilator according to claim 5, characterized in that: a fixing rod (7) is fixedly connected to the inner wall of the heat retention plate (5); a cotton block (71) is fixedly connected to the outside of the fixing rod (7); and a water tank (72) is provided on the inner wall of the heat retention plate (5) and below the cotton block (71). 8. A fresh air ventilator according to claim 7, characterized in that: a water cavity (8) is provided inside the heat retention plate (5) and above the cotton block (71); a flow transfer cavity (81) is provided inside the heat retention plate (5) and at the bottom of the water cavity (8); a No. 1 connecting pipe (82) is connected between the water cavity (8) and the flow transfer cavity (81); a No. 2 connecting pipe (83) is connected between the cotton block (71) and the flow transfer cavity (81); a spiral tube (84) is fixedly connected to one end of the No. 2 connecting tube (83) away from the flow transfer cavity (81), and a plurality of flow holes are provided on the outside of the spiral tube (84). 9. A fresh air ventilator according to claim 8, characterized in that: a partition (9) is slidably connected to the inner wall of the air cylinder (4); an elastic member (91) is fixedly connected to the bottom end of the partition (9); a No. 2 air pipe (92) is fixedly connected to the outside of the air cylinder (4), and the end of the No. 2 air pipe (92) away from the air cylinder (4) is connected to the inside of the heat retaining plate (5); and an extrusion plate (93) is slidably connected to the inner wall of the transfer chamber (81). 10. A fresh air ventilator according to claim 9, characterized in that: a connecting rod (95) is fixedly connected to the top end of the extrusion plate (93); a conical block (96) is fixedly connected to the top end of the connecting rod (95), and the conical block (96) is set corresponding to the diameter of the No. 1 connecting pipe (82).