Fresh air machine

Abstract

The fresh air machine comprises a shell, one end of the shell is provided with an outdoor air inlet and an outdoor air outlet, the other end of the shell is provided with an indoor air inlet and an indoor air outlet, the outdoor air inlet is communicated with the indoor air outlet, the indoor air inlet is communicated with the outdoor air outlet, the shell is provided with a drainage cavity, and the drainage cavity is communicated with the outdoor air outlet. The drainage cavity is arranged below the outdoor air inlet, the shell is provided with a drainage port, and the drainage port is communicated with the outdoor air inlet and the drainage cavity. And outside rainwater easily enters the shell from the outdoor air inlet and is discharged into the drainage cavity after flowing through the drainage port, so that components in the shell are not easily influenced, and the service life of the fresh air ventilator is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of fresh air machines, in particular to a fresh air machine. BACKGROUND

[0002] A fresh air machine is a key device for improving indoor air quality. Its core function is to actively introduce outdoor fresh air into the room after filtration under the condition of closed doors and windows, while forcibly expelling indoor polluted air to the outside, achieving continuous and controllable ventilation. A typical fresh air machine mainly includes the following core structural components: outdoor air inlet, air filtration module, fan, heat exchange core, indoor air outlet, indoor air inlet and outdoor air outlet, etc.

[0003] The existing fresh air machine, especially the outdoor air inlet, faces a significant technical challenge in actual operation: rainwater intrusion risk. Since the air inlet is directly exposed to the outdoor environment, in the face of heavy rain, rainstorm or specific wind direction, rainwater is easy to seep into or even pour into the device through the air inlet with the help of wind or its own gravity. Although some designs set a simple rain baffle at the air inlet, under the impact of extreme weather or specific angle of wind and rain, its waterproof effect is often insufficient, and rainwater may still be driven by strong wind pressure or flow into the device along the surface of the structure.

[0004] This rainwater intrusion can cause a series of serious problems: the wet air filtration module and heat exchange core not only fail easily, but also breed mold and produce odors, which in turn pollute the air sent into the room, affecting the performance, health status and service life of the device. SUMMARY

[0005] In order to prolong the service life of the device, the present application provides a fresh air machine.

[0006] The fresh air machine provided by the present application adopts the following technical scheme: A fresh air machine, comprising a shell, one end of the shell is provided with an outdoor air inlet and an outdoor air outlet, the other end of the shell is provided with an indoor air inlet and an indoor air outlet, the outdoor air inlet is communicated with the indoor air outlet, the indoor air inlet is communicated with the outdoor air outlet, the shell is provided with a drainage cavity, the drainage cavity is arranged below the outdoor air inlet, the shell is provided with a drainage port, the drainage port is communicated with the outdoor air inlet and the drainage cavity.

[0007] By adopting the above technical scheme, external rainwater is easy to enter the shell from the outdoor air inlet, and the rainwater flows out to the drainage cavity after passing through the drainage port, which does not easily affect the internal components of the shell, prolonging the service life of the fresh air machine.

[0008] Preferably, the shell is provided with a receiving cavity, the first baffle and the second baffle are fixedly connected to the inner wall of the receiving cavity, the first baffle and the second baffle are parallel to each other, the first baffle and the second baffle divide the receiving cavity into a first installation cavity, a second installation cavity and a third installation cavity, the second installation cavity is arranged between the first baffle and the second baffle, the heat exchange core is detachably connected to the inner wall of the second installation cavity, the first partition plate is fixedly connected to the inner wall of the first installation cavity, the first partition plate divides the first installation cavity into an outdoor air inlet cavity and an outdoor air outlet cavity, the second partition plate is fixedly connected to the inner wall of the third installation cavity, the second partition plate divides the third installation cavity into an indoor air inlet cavity and an indoor air outlet cavity, the outdoor air inlet is communicated with the outdoor air inlet cavity, the outdoor air outlet is communicated with the outdoor air outlet cavity, the indoor air inlet is communicated with the indoor air inlet cavity, the indoor air outlet is communicated with the indoor air outlet cavity, the outdoor air inlet cavity is communicated with the indoor air outlet cavity through the heat exchange core, the outdoor air outlet cavity is communicated with the outdoor air inlet cavity through the heat exchange core, and the drain port is communicated with the outdoor air inlet cavity.

[0009] By adopting the above technical scheme, the outdoor air enters the indoor through the outdoor air inlet, the outdoor air inlet cavity, the heat exchange core, the indoor air outlet cavity and the indoor air outlet in sequence, and the indoor air is discharged to the outdoor through the indoor air inlet, the indoor air inlet cavity, the heat exchange core, the outdoor air outlet cavity and the outdoor air outlet in sequence, so that the structure is compact, air heat exchange is facilitated, and energy loss is reduced.

[0010] Preferably, the heat exchange core is slidably connected to the inner wall of the second installation cavity, the sliding direction of the heat exchange core is parallel to the length direction of the first baffle, the heat exchange core divides the second installation cavity into a first communication cavity, a second communication cavity, a third communication cavity and a fourth communication cavity, the first baffle is provided with a first communication port and a second communication port, the first communication port is communicated with the outdoor air inlet cavity and the first communication cavity, and the second communication port is communicated with the outdoor air outlet cavity and the second communication cavity, the second baffle is provided with a third communication port and a fourth communication port, the third communication port is communicated with the indoor air outlet cavity and the third communication cavity, and the fourth communication port is communicated with the indoor air inlet cavity and the fourth communication cavity, the first communication cavity is communicated with the fourth communication cavity through the heat exchange core, and the second communication cavity is communicated with the third communication cavity through the heat exchange core.

[0011] By adopting the above technical scheme, the first communication cavity and the fourth communication cavity are communicated, the second communication cavity and the third communication cavity are communicated, the existence of the communication cavity facilitates full use of the heat exchange core, improves the heat exchange efficiency, and reduces the energy loss.

[0012] Preferably, the height of the outdoor air inlet is less than the height of the outdoor air outlet, and the height of the indoor air inlet is less than the height of the indoor air outlet.

[0013] By adopting the technical scheme, heat exchange between outside air and indoor air is facilitated, meanwhile, the outdoor air inlet is prone to water, has a low height, is convenient to clean, is convenient to drain, and the service life of the fresh air machine is prolonged.

[0014] Preferably, the first filter plate and the second filter plate are further included, the first filter plate is slidingly connected to the inner wall of the first communication cavity, and the second filter plate is slidingly connected to the inner wall of the fourth communication cavity.

[0015] By adopting the technical scheme, the first filter plate and the second filter plate filter the incoming air, reduce the entry of large-particle impurities into the heat exchange core, prolong the service life of the heat exchange core, and prolong the service life of the fresh air machine.

[0016] Preferably, the fixed cylinder and the first turnover plate are further included, the fixed cylinder is fixedly connected to the inner wall of the outdoor air inlet cavity, the fixed cylinder is coaxially arranged with the drain port, both ends of the first turnover plate are fixedly connected with the first hinge shaft, the first hinge shaft is rotationally connected to the fixed cylinder about the axis thereof, the rotation axis of the first hinge shaft is horizontal, and the first turnover plate is used for covering the drain port.

[0017] By adopting the technical scheme, when outside rainwater enters the indoor air inlet cavity, the first turnover plate is turned over, the drain port is opened, rainwater is conveniently drained out, the probability that the heat exchange core is contaminated due to the accumulation of rainwater in the indoor air inlet cavity is reduced, and the service life of the fresh air machine is prolonged.

[0018] Preferably, the water receiving cylinder and the first pull rope are further included, the shell is provided with a through hole, the through hole is arranged on the outer periphery of the fixed cylinder, the water receiving cylinder is slidingly connected to the inner wall of the through hole, the height of the water receiving cylinder is less than the height of the first hinge shaft, one end of the first pull rope is fixedly connected to the water receiving cylinder, and the other end of the first pull rope is fixedly connected to the outer wall of the first hinge shaft.

[0019] By adopting the technical scheme, the height of the water receiving cylinder is less than the height of the fixed cylinder, the water receiving cylinder is first water-receiving and then slides downward, the first hinge shaft is driven to rotate by the first pull rope, the first turnover plate is opened, the water surface height is not greater than the height of the fixed cylinder, drainage is facilitated, and the service life of the fresh air machine is prolonged.

[0020] Preferably, the outer wall of the water receiving cylinder is provided with a water overflow port, and the water overflow port is used for communicating the drain cavity.

[0021] By adopting the technical scheme, when the water receiving cylinder slides downward by a certain distance, the water overflow port communicates with the drain cavity, drainage is facilitated, the outdoor air inlet cavity is less likely to accumulate water, and the service life of the fresh air machine is prolonged.

[0022] Preferably, the moisture absorption cotton is fixedly connected to the inner wall of the frame body, one end of the frame body is fixedly connected with a rotating column, the rotating column is rotatably connected to the inner wall of the first communication cavity around its own axis, and the moisture absorption cotton is used to cover the first filter plate.

[0023] By adopting the technical scheme, the frame body rotates to cover the first filter plate, so that the air inlet is first filtered by the moisture absorption cotton, the damage of humid air to the first filter plate and the heat exchange core is reduced, and the service life of the fresh air machine is prolonged.

[0024] Preferably, the second pull rope and the wire ring are further included, one end of the second pull rope is fixedly connected to the outer wall of the first hinged shaft, the other end of the second pull rope is fixedly connected to the outer wall of the rotating column, the wire ring is fixedly connected to the bottom wall of the outdoor air inlet cavity, and the second pull rope passes through the wire ring.

[0025] By adopting the technical scheme, the first hinged shaft rotates while driving the rotating column to rotate through the second pull rope, so that the moisture absorption cotton covers the first filter plate, and when water enters the outdoor air inlet cavity, the frame body automatically rotates to protect the first filter plate and the heat exchange core.

[0026] To sum up, the present application has at least one of the following beneficial technical effects: 1. Rainwater from the outside is easy to enter the shell through the outdoor air inlet, and the rainwater flows through the drain port and is discharged into the drain cavity, so that the internal components of the shell are not easily affected, and the service life of the fresh air machine is prolonged. 2. The height of the water receiving cylinder is less than the height of the fixed cylinder, the water receiving cylinder first receives water and then slides downward, drives the first hinged shaft to rotate through the first pull rope, so that the first turnover plate is opened, the water surface height is not greater than the height of the fixed cylinder, and the water is easily drained, thereby prolonging the service life of the fresh air machine. 3. The frame body rotates to cover the first filter plate, so that the air inlet is first filtered by the moisture absorption cotton, the damage of humid air to the first filter plate and the heat exchange core is reduced, and the service life of the fresh air machine is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of a fresh air machine.

[0028] Figure 2 It is a sectional view of a fresh air machine.

[0029] Figure 3 It is a schematic diagram of the internal structure of a fresh air machine after being cut open.

[0030] Figure 4 It is a schematic diagram of the internal structure of a fresh air machine after being cut open, mainly used to show the first baffle, the first communication port, the second baffle and the third communication port.

[0031] Figure 5is Figure 2 An enlarged view of the middle A.

[0032] Figure 6 is Figure 2 An enlarged view of the middle B.

[0033] BRIEF DESCRIPTION OF DRAWINGS: 1, body; 11, shell; 111, accommodating cavity; 112, first mounting cavity; 1121, outdoor air inlet cavity; 1122, outdoor air outlet cavity; 113, second mounting cavity; 1131, first communication cavity; 1132, second communication cavity; 1133, third communication cavity; 1134, fourth communication cavity; 114, third mounting cavity; 1141, indoor air inlet cavity; 1142, indoor air outlet cavity; 115, mounting port; 1161, outdoor air inlet port; 1162, outdoor air outlet port; 1163, indoor air inlet port; 1164, indoor air outlet port; 1165, electric control butterfly valve; 1171, drainage cavity; 1172, drainage port; 1173, sewerage port; 1174, through port; 119, connecting port; 12, first baffle; 121, first communication port; 122, second communication port; 13, second baffle; 131, third communication port; 132, fourth communication port; 14, cover plate; 15, heat exchange core; 16, first partition plate; 17, second partition plate; 18, first filter plate; 19, second filter plate; 110, fan; 2, cleaning piece; 21, valve; 22, fixed cylinder; 23, first turnover plate; 231, first hinged shaft; 24, water receiving cylinder; 241, blocking ring; 242, overflow port; 25, first pull rope; 26, moisture absorbing cotton; 27, frame body; 271, rotating column; 28, second pull rope; 29, wire ring; 3, warning piece; 31, connecting column; 32, impeller; 33, ribbon. DETAILED DESCRIPTION

[0034] The following description will be made in conjunction with the accompanying drawings. Figures 1-6 The present application is further described in detail.

[0035] The present application discloses a new fan. Referring to Figure 1 and Figure 2 A new fan includes a body 1, a cleaning piece 2 and a warning piece 3.

[0036] Referring to Figure 2 and Figure 3 The body 1 includes a shell 11, a first baffle 12, a second baffle 13, a cover plate 14, a heat exchange core 15, a first partition plate 16, a second partition plate 17, a first filter plate 18, a second filter plate 19 and a fan 110.

[0037] The shell 11 is provided with a containing cavity 111, the shape of the shell 11 is rectangular, the first baffle 12 and the second baffle 13 are both fixedly connected to the inner wall of the containing cavity 111, the first baffle 12 and the second baffle 13 are parallel to each other, the first baffle 12 and the second baffle 13 are both parallel to the height direction of the shell 11, and the first baffle 12 and the second baffle 13 separate the containing cavity 111 into a first mounting cavity 112, a second mounting cavity 113 and a third mounting cavity 114, and the second mounting cavity 113 is arranged between the first baffle 12 and the second baffle 13.

[0038] With reference to Figure 2 and Figure 3 , the upper end of the shell 11 is provided with a mounting port 115, the mounting port 115 is communicated with the second mounting cavity 113, the cover plate 14 is detachably connected to the outer wall of the shell 11 through screws, the cover plate 14 is used for covering the mounting port 115, the cross section of the heat exchange core 15 is hexagonal, the heat exchange core 15 is slidably connected to the inner wall of the second mounting cavity 113 from the mounting port 115, the sliding direction of the heat exchange core 15 is parallel to the length direction of the first baffle 12, and the heat exchange core 15 separates the second mounting cavity 113 into a first communicating cavity 1131, a second communicating cavity 1132, a third communicating cavity 1133 and a fourth communicating cavity 1134, the first communicating cavity 1131 and the second communicating cavity 1132 are close to the first baffle 12, and the third communicating cavity 1133 and the fourth communicating cavity 1134 are close to the second baffle 13.

[0039] With reference to Figure 2 , the first partition plate 16 is fixedly connected to the inner wall of the first mounting cavity 112, the first partition plate 16 is horizontally arranged, the first partition plate 16 separates the first mounting cavity 112 into an outdoor air inlet cavity 1121 and an outdoor air outlet cavity 1122, the second partition plate 17 is fixedly connected to the inner wall of the third mounting cavity 114, the second partition plate 17 is horizontally arranged, and the second partition plate 17 separates the third mounting cavity 114 into an indoor air inlet cavity 1141 and an indoor air outlet cavity 1142.

[0040] One end of the shell 11 is provided with an outdoor air inlet port 1161 and an outdoor air outlet port 1162, the other end of the shell 11 is provided with an indoor air inlet port 1163 and an indoor air outlet port 1164, the outdoor air inlet port 1161 is communicated with the outdoor air inlet cavity 1121, the outdoor air outlet port 1162 is communicated with the outdoor air outlet cavity 1122, the indoor air inlet port 1163 is communicated with the indoor air inlet cavity 1141, the indoor air outlet port 1164 is communicated with the indoor air outlet cavity 1142, the height of the outdoor air inlet port 1161 is less than the height of the outdoor air outlet port 1162, and the height of the indoor air inlet port 1163 is less than the height of the indoor air outlet port 1164. The inner wall of the outdoor air outlet port 1162 and the inner wall of the outdoor air inlet port 1161 are both fixedly connected with an electrically-controlled butterfly valve 1165.

[0041] With reference to Figure 3 and Figure 4The first baffle 12 is provided with a first communication port 121 and a second communication port 122, the first communication port 121 is communicated with the outdoor air inlet cavity 1121 and the first communication cavity 1131, the second communication port 122 is communicated with the outdoor air outlet cavity 1122 and the second communication cavity 1132, the second baffle 13 is provided with a third communication port 131 and a fourth communication port 132, the third communication port 131 is communicated with the indoor air outlet cavity 1142 and the third communication cavity 1133, the fourth communication port 132 is communicated with the indoor air inlet cavity 1141 and the fourth communication cavity 1134, the first communication cavity 1131 is communicated with the fourth communication cavity 1134 through the heat exchange core 15, and the second communication cavity 1132 is communicated with the third communication cavity 1133 through the heat exchange core 15.

[0042] With reference to Figure 3 The first filter plate 18 is slidingly connected to the inner wall of the first communication cavity 1131, and the first filter plate 18 is attached to the outer wall of the heat exchange core 15, the second filter plate 19 is slidingly connected to the inner wall of the fourth communication cavity 1134, and the second filter plate 19 is attached to the outer wall of the heat exchange core 15. The fan 110 is provided with two, and the two fans 110 are respectively fixedly connected to the inner wall of the indoor air outlet cavity 1142 and the inner wall of the outdoor air outlet cavity 1122.

[0043] With reference to Figure 2 And Figure 5 The cleaning piece 2 comprises a valve 21, a fixed cylinder 22, a first turnover plate 23, a water collecting cylinder 24 and a first pull rope 25.

[0044] With reference to Figure 2 The shell 11 is provided with a drainage cavity 1171, the drainage cavity 1171 is arranged below the outdoor air inlet cavity 1121, the shell 11 is provided with a drainage port 1172, the axis of the drainage port 1172 is vertical, the drainage port 1172 is communicated with the outdoor air inlet cavity 1121 and the drainage cavity 1171, the lower end of the shell 11 is provided with a drain port 1173, the drain port 1173 is communicated with the drainage cavity 1171, the valve 21 is connected to the inner wall of the drain port 1173, and the valve 21 is used for controlling the opening and closing of the drain port 1173.

[0045] With reference to Figure 2 And Figure 5 The fixed cylinder 22 is fixedly connected to the bottom wall of the outdoor air inlet cavity 1121, the fixed cylinder 22 is coaxially arranged with the drainage port 1172, the two ends of the first turnover plate 23 are fixedly connected with a first hinge shaft 231, the first hinge shaft 231 is rotationally connected to the fixed cylinder 22 around the axis thereof, the rotation axis of the first hinge shaft 231 is horizontal, and the first turnover plate 23 is used for covering the drainage port 1172.

[0046] The shell 11 is provided with a through hole 1174 arranged on the outer periphery of the fixed cylinder 22, the axis of the through hole 1174 is parallel to the axis of the drain port 1172, the through hole 1174 is communicated with the outdoor air inlet cavity 1121 and the drain cavity 1171, the water collecting cylinder 24 is slidingly connected to the inner wall of the through hole 1174, the outer wall of the water collecting cylinder 24 is fixedly connected with a blocking ring 241, the blocking ring 241 is close to the top of the water collecting cylinder 24, the diameter of the blocking ring 241 is greater than the diameter of the through hole 1174, the height of the water collecting cylinder 24 is less than the height of the first hinge shaft 231, one end of the first pull rope 25 is fixedly connected to the water collecting cylinder 24, the other end of the first pull rope 25 is fixedly connected to the outer wall of the first hinge shaft 231, when the water collecting cylinder 24 collects water and the gravity increases, the water collecting cylinder 24 slides downward, and the first pull rope 25 drives the first turnover plate 23 to rotate. The outer wall of the water collecting cylinder 24 is provided with a water overflow port 242, the height of the water overflow port 242 is less than the height of the blocking ring 241, when the blocking ring 241 abuts against the bottom wall of the outdoor air inlet cavity 1121, the water overflow port 242 is communicated with the drain cavity 1171.

[0047] With reference to Figure 3 and Figure 6 The cleaning piece 2 further comprises hygroscopic cotton 26, a frame 27, a second pull rope 28 and a wire ring 29.

[0048] The hygroscopic cotton 26 is fixedly connected to the inner wall of the frame 27, one end of the frame 27 is fixedly connected with a rotating column 271, the rotating column 271 is rotationally connected to the inner wall of the first communication cavity 1131 about the axis thereof, the rotating axis of the rotating column 271 is vertical, the distance from the rotating column 271 to the fixed cylinder 22 is less than the distance from the free end of the frame 27 to the fixed cylinder 22, the hygroscopic cotton 26 is used to cover the first filter plate 18, one end of the second pull rope 28 is fixedly connected to the outer wall of the first hinge shaft 231, the other end of the second pull rope 28 is fixedly connected to the outer wall of the rotating column 271, the wire ring 29 is fixedly connected to the bottom wall of the outdoor air inlet cavity 1121, the second pull rope 28 passes through the wire ring 29, when the first hinge shaft 231 rotates to open the first turnover plate 23, the rotating column 271 is pulled to rotate by the second pull rope 28, so that the hygroscopic cotton 26 adheres to the outer wall of the first filter plate 18.

[0049] The cleaning piece 2 further comprises a dismounting plate, the outer wall of the shell 11 is provided with a dismounting port, the dismounting port is communicated with the outdoor air inlet cavity 1121, the dismounting plate is fixedly connected to the outer wall of the shell 11 by screws, the dismounting plate covers the dismounting port, and the dismounting port facilitates the user to clean the outdoor air inlet cavity 1121.

[0050] With reference to Figure 2 and Figure 5The warning member 3 comprises a connecting column 31, an impeller 32 and a ribbon 33. The outer wall of the shell 11 is provided with a connecting port 119, which is arranged below the outdoor air inlet 1161. The axis of the connecting port 119 is parallel to the axis of the outdoor air inlet 1161. The connecting column 31 is coaxially and rotatably connected to the inner wall of the connecting port 119. The impeller 32 is fixedly connected to one end of the connecting column 31. The impeller 32 is arranged below the overflow port 242. The ribbon 33 is fixedly connected to the other end of the connecting column 31. The ribbon 33 is arranged on the outer periphery of the shell 11. The overflow port 242 discharges water to rotate the impeller 32. The rotation of the ribbon 33 reminds the user that the fresh air machine 110 is filled with water.

[0051] The implementation principle of the fresh air machine according to the embodiment of the application is as follows: after the rainwater from the outside enters the outdoor air inlet cavity 1121 from the outdoor air inlet 1161, the water receiving cylinder 24 receives water and the gravity increases. The first pull rope 25 drives the first hinged shaft 231 to rotate. The first turnover plate 23 is opened. The second pull rope 28 drives the rotating column 271 to rotate. The moisture-absorbing cotton 26 covers the first filter plate 18. At this time, the overflow port 242 is communicated with the drainage cavity 1171. The rotation of the impeller 32 makes the ribbon 33 dance, reminding the user that the fresh air machine 110 is filled with water.

[0052] The above are preferred embodiments of the application, and do not limit the protection scope of the application. Therefore, equivalent changes made on the basis of the structure, shape and principle of the application should be covered by the protection scope of the application.

Claims

1. A fresh air ventilator, characterized in that: The device includes a housing (11), one end of which is provided with an outdoor air inlet (1161) and an outdoor air outlet (1162), and the other end of which is provided with an indoor air inlet (1163) and an indoor air outlet (1164). The outdoor air inlet (1161) is connected to the indoor air outlet (1164), and the indoor air inlet (1163) is connected to the outdoor air outlet (1162). The housing (11) is provided with a drainage chamber (1171), which is located below the outdoor air inlet (1161). The housing (11) is provided with a drainage outlet (1172), which is connected to the outdoor air inlet (1161) and the drainage chamber (1171).

2. A fresh air ventilator according to claim 1, characterized in that: It also includes a first baffle (12), a second baffle (13), a heat exchange core (15), a first partition plate (16), and a second partition plate (17). The housing (11) is provided with a receiving cavity (111). The first baffle (12) and the second baffle (13) are both fixedly connected to the inner wall of the receiving cavity (111). The first baffle (12) and the second baffle (13) are parallel to each other. The first baffle (12) and the second baffle (13) divide the receiving cavity (111) into a first mounting cavity (112), a second mounting cavity (113), and a third mounting cavity (114). The second mounting cavity (113) is located between the first baffle (12) and the second baffle (13). The heat exchange core (15) is detachably connected to the inner wall of the second mounting cavity (113). The first partition plate (16) is fixedly connected to the inner wall of the first mounting cavity (112). The first partition plate (16) divides the first mounting cavity (112) into an outdoor area. The third mounting cavity (114) has an air inlet chamber (1121) and an outdoor air outlet chamber (1122). The second partition plate (17) is fixedly connected to the inner wall of the third mounting cavity (114). The second partition plate (17) divides the third mounting cavity (114) into an indoor air inlet chamber (1141) and an indoor air outlet chamber (1142). The outdoor air inlet (1161) is connected to the outdoor air inlet chamber (1121), and the outdoor air outlet (1162) is connected to the outdoor air outlet chamber (1122). The indoor air inlet (1163) is connected to the indoor air inlet cavity (1141), the indoor air outlet (1164) is connected to the indoor air outlet cavity (1142), the outdoor air inlet cavity (1121) is connected to the indoor air outlet cavity (1142) through the heat exchange core (15), the outdoor air outlet cavity (1122) is connected to the outdoor air inlet cavity (1121) through the heat exchange core (15), and the drain outlet (1172) is connected to the outdoor air inlet cavity (1121).

3. A fresh air ventilator according to claim 2, characterized in that: The heat exchange core (15) is slidably connected to the inner wall of the second mounting cavity (113). The sliding direction of the heat exchange core (15) is parallel to the length direction of the first baffle (12). The heat exchange core (15) divides the second mounting cavity (113) into a first connecting cavity (1131), a second connecting cavity (1132), a third connecting cavity (1133), and a fourth connecting cavity (1134). The first baffle (12) is provided with a first connecting port (121) and a second connecting port (122). The first connecting port (121) connects to the outdoor air inlet cavity (1121) and the first connecting cavity (1131). The second connecting port (122) connects to the outdoor air inlet cavity (1121) and the first connecting cavity (1131). 2) Connected to the outdoor air outlet cavity (1122) and the second connecting cavity (1132), the second baffle (13) is provided with a third connecting port (131) and a fourth connecting port (132). The third connecting port (131) is connected to the indoor air outlet cavity (1142) and the third connecting cavity (1133), and the fourth connecting port (132) is connected to the indoor air inlet cavity (1141) and the fourth connecting cavity (1134). The first connecting cavity (1131) is connected to the fourth connecting cavity (1134) through the heat exchange core (15), and the second connecting cavity (1132) is connected to the third connecting cavity (1133) through the heat exchange core (15).

4. A fresh air ventilator according to claim 3, characterized in that: The height of the outdoor air inlet (1161) is less than the height of the outdoor air outlet (1162), and the height of the indoor air inlet (1163) is less than the height of the indoor air outlet (1164).

5. A fresh air ventilator according to claim 3, characterized in that: It also includes a first filter plate (18) and a second filter plate (19), the first filter plate (18) being slidably connected to the inner wall of the first communicating cavity (1131), and the second filter plate (19) being slidably connected to the inner wall of the fourth communicating cavity (1134).

6. A fresh air ventilator according to claim 3, characterized in that: It also includes a fixed cylinder (22) and a first flip plate (23). The fixed cylinder (22) is fixedly connected to the inner wall of the outdoor air inlet cavity (1121). The fixed cylinder (22) is coaxially arranged with the drain outlet (1172). The two ends of the first flip plate (23) are fixedly connected to a first hinge shaft (231). The first hinge shaft (231) is rotatably connected to the fixed cylinder (22) around its own axis. The rotation axis of the first hinge shaft (231) is horizontal. The first flip plate (23) is used to cover the drain outlet (1172).

7. A fresh air ventilator according to claim 6, characterized in that: It also includes a water receiving tube (24) and a first pull rope (25). The housing (11) is provided with a through hole (1174). The through hole (1174) is located on the outer periphery of the fixed tube (22). The water receiving tube (24) is slidably connected to the inner wall of the through hole (1174). The height of the water receiving tube (24) is less than the height of the first hinge shaft (231). One end of the first pull rope (25) is fixedly connected to the water receiving tube (24), and the other end of the first pull rope (25) is fixedly connected to the outer wall of the first hinge shaft (231).

8. A fresh air ventilator according to claim 7, characterized in that: The outer wall of the water receiving tube (24) is provided with an overflow port (242), which is used to connect to the drain chamber (1171).

9. A fresh air ventilator according to claim 6, characterized in that: It also includes a moisture-absorbing cotton (26) and a frame (27). The moisture-absorbing cotton (26) is fixedly connected to the inner wall of the frame (27). A rotating column (271) is fixedly connected to one end of the frame (27). The rotating column (271) is rotatably connected to the inner wall of the first communicating cavity (1131) around its own axis. The moisture-absorbing cotton (26) is used to cover the first filter plate (18).

10. A fresh air ventilator according to claim 9, characterized in that: It also includes a second pull rope (28) and a guide ring (29). One end of the second pull rope (28) is fixedly connected to the outer wall of the first hinge shaft (231), and the other end of the second pull rope (28) is fixedly connected to the outer wall of the rotating column (271). The guide ring (29) is fixedly connected to the bottom wall of the outdoor air inlet cavity (1121). The second pull rope (28) passes through the guide ring (29).

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