CN115468227A

CN115468227A - Fresh air module and air conditioner

Info

Publication number: CN115468227A
Application number: CN202211187639.6A
Authority: CN
Inventors: 徐智勇; 周元乐; 皮书扬
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2020-03-30
Filing date: 2020-03-30
Publication date: 2022-12-13
Also published as: CN111306630A; CN115468226A

Abstract

The invention discloses a fresh air module and an air conditioner. The shell is provided with a fresh air inlet and a fresh air outlet communicated with the fresh air inlet; one end of the fresh air pipe is suitable for being communicated with the fresh air inlet, and the other end of the fresh air pipe is suitable for being communicated with an outdoor environment; the rat-proof accessory is arranged at the fresh air pipe or the fresh air inlet. The fresh air module can reduce the condition that the mouse small animals enter the fresh air module from the fresh air pipe, so that the internal environment or internal components of the fresh air module are prevented from being damaged by the small animals.

Description

Fresh air module and air conditioner

The application is a divisional application with the application number of 202010240228.3, and the application date of a parent case is 03-30 months in 2020; the invention provides the following: fresh air module and air conditioner.

Technical Field

The invention relates to the technical field of air conditioners, in particular to a fresh air module and an air conditioner.

Background

In the related art, air conditioners in the market are usually configured with a fresh air module, and a fresh air inlet of the fresh air module is communicated to the outside through a fresh air pipe, so that fresh air of the outdoor environment is introduced into the indoor environment through the fresh air pipe, the fresh air quantity of the indoor environment is supplemented, and the air quality of the indoor environment is improved. However, because the fresh air pipe passes through fresh air inlet and the inside intercommunication of fresh air module to inside the little animals such as mouse can enter into the fresh air module from this fresh air pipe easily, cause the damage to fresh air module internals easily.

Disclosure of Invention

The invention mainly aims to provide a fresh air module, aiming at reducing the occurrence of the condition that mouse small animals enter the fresh air module from a fresh air pipe so as to prevent the internal environment or internal components of the fresh air module from being damaged by the small animals.

In order to achieve the purpose, the invention provides a fresh air module which comprises a shell, a fresh air pipe and a rat-proof accessory. The shell is provided with a fresh air inlet and a fresh air outlet communicated with the fresh air inlet; one end of the fresh air pipe is suitable for being communicated with the fresh air inlet, and the other end of the fresh air pipe is suitable for being communicated with an outdoor environment; the rat-proof accessory is arranged at the fresh air pipe or the fresh air inlet.

Optionally, the ratproof accessory comprises a main body part and a blocking part configured at one end of the main body part; the main body part is sleeved on the peripheral wall of the fresh air pipe, and the blocking part extends to the air inlet pipe orifice of the fresh air pipe from the main body part.

Optionally, the blocking portion of the rat guard is designed in a shape of a coil spring, and the spiral radius of the blocking portion is gradually reduced and the blocking portion is arranged in a gathering shape.

Optionally, the main body of the ratproof accessory is designed in a spiral spring shape and is spirally sleeved with the peripheral wall of the fresh air pipe.

Optionally, the periphery wall of new trend pipe is constructed to be the heliciform and sets up spiral protruding muscle, the new trend pipe passes through spiral protruding muscle with the main part spiral cover of protection against rodents accessory is put.

Optionally, the ratproof fitting is made of an elastic material so that the ratproof fitting has elasticity.

Optionally, the new trend module still includes protective case, protective case cover is located the outside of new trend pipe.

The invention also provides an air conditioner which comprises a machine shell and the fresh air module arranged in the machine shell. The air conditioner comprises a shell, wherein the shell is provided with an air inlet, a first air outlet and a second air outlet, and the air inlet is communicated with the first air outlet. The new trend module includes casing, fresh air pipe and protection against rodents accessory. The shell is provided with a fresh air inlet and a fresh air outlet communicated with the fresh air inlet; one end of the fresh air pipe is suitable for being communicated with the fresh air inlet, and the other end of the fresh air pipe is suitable for being communicated with an outdoor environment; the ratproof accessory is arranged at the fresh air pipe or the fresh air inlet. The fresh air inlet of the fresh air module is suitable for being communicated with the outdoor environment through a fresh air pipe, and the fresh air outlet of the fresh air module is suitable for being communicated with the second air outlet.

Optionally, the air conditioner is any one of a wall-mounted air conditioner indoor unit, a cabinet air conditioner indoor unit, an air machine, a ceiling air conditioner indoor unit, or a mobile air conditioner.

Optionally, the casing of the wall-mounted air conditioner indoor unit comprises a chassis, a face frame and a panel, and the end of the panel is provided with the second air outlet; the fresh air module is installed at the end part of the chassis, and a fresh air outlet of the fresh air module corresponds to the second air outlet.

According to the technical scheme, the rat-proof accessories are arranged at the fresh air inlet of the fresh air module or on the fresh air pipe, so that external rat and mouse small animals are shielded by the rat-proof accessories, the small animals are prevented from entering the fresh air module from the fresh air pipe through the fresh air inlet, the internal environment or internal components of the fresh air module are prevented from being damaged by the small animals, and the normal use of the fresh air module is ensured.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of an air conditioner according to an embodiment of the present invention;

FIG. 2 is a schematic view of a fresh air module according to an embodiment of the present invention;

FIG. 3 is a schematic view of the fresh air module of FIG. 2 assembled with a fresh air duct and a ratproof fitting;

FIG. 4 is a cross-sectional view taken along line I-I of FIG. 3;

FIG. 5 is a schematic view of the fresh air module of FIG. 3, with the fresh air duct and the ratproof fitting disassembled;

FIG. 6 is a schematic view of the assembly of the fresh air duct and ratproof fitting of FIG. 5;

FIG. 7 is a schematic diagram of an internal structure of a fresh air module according to still another embodiment of the present invention;

fig. 8 is an exploded view of the fresh air module of fig. 7.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Air conditioner	302	Fresh air outlet
110	Casing (CN)	400	Fan assembly
				111	Chassis	410	Centrifugal wind wheel
112	Face frame	420	Electric machine
				113	Panel board	500	Purification assembly
101	Air inlet	600	Middle partition board
				102	First air outlet	610	Vent hole
103	Second air outlet	700	Fresh air pipe
				200	Fresh air module	710	Spiral convex rib
300	Shell body	800	Pipe joint
				310	Bottom shell	900	Ratproof fittings
320	Shell cover	910	Main body part
				301	Fresh air inlet	920	Barrier portion

The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 8, the present invention provides an embodiment of a fresh air module and an air conditioner including the same; wherein the dashed arrows in fig. 4 and 7 indicate the airflow direction. The fresh air module can reduce the condition that the mice animalcule enters into the fresh air module from this fresh air pipe and takes place to avoid the internal environment or the internals of fresh air module to be destroyed by the animalcule. The air conditioner can be any one of a wall-mounted air conditioner indoor unit, a cabinet air conditioner indoor unit, an air machine, a ceiling air conditioner indoor unit or a mobile air conditioner. In the following embodiments, an air conditioner is mainly described as an example of a wall-mounted air conditioner indoor unit, and other types may be referred to for implementation.

Referring to fig. 2 to 4, in an embodiment of the fresh air module 200, the fresh air module 200 includes a housing 300, a fresh air duct 700 and a rat-proof accessory 900. The shell 300 is provided with a fresh air inlet 301 and a fresh air outlet 302 communicated with the fresh air inlet 301; one end of the fresh air pipe 700 is suitable for being communicated with the fresh air inlet 301, and the other end of the fresh air pipe 700 is suitable for being communicated with the outdoor environment; the rat-proof accessory 900 is disposed at the fresh air duct 700 or the fresh air inlet 301.

Referring to fig. 4 and 5, specifically, a fresh air duct is formed inside the housing 300 of the fresh air module 200, and the fresh air duct simplifies the communication between the fresh air inlet 301 and the fresh air outlet 302. The housing 300 includes a bottom case 310 and a cover adapted to cover the bottom case 310. The fresh air module 200 is also provided with a middle partition plate 600 in the fresh air duct, and the fresh air duct is divided into an air inlet cavity and an air outlet cavity by the middle partition plate 600; the middle partition plate 600 is provided with a vent hole 610 for communicating the air inlet chamber and the air outlet chamber. The bottom of the shell 300 can be provided with a fresh air inlet 301, and the fresh air inlet 301 is communicated with the air inlet cavity; the casing 300 may be provided with a fresh air outlet 302 at the top or the front side or the left side or the right side thereof, and the fresh air outlet 302 is communicated with the air outlet cavity.

Optionally, the bottom of the housing 300 is provided with a fresh air inlet 301, and the fresh air inlet is opened towards the rear side of the fresh air module 200 to allow air to enter from the rear; the housing 300 is provided with a fresh air outlet 302 at a front side thereof to supply air toward the front side of the fresh air module 200. One end of the fresh air duct 700 is connected to the fresh air inlet 301 through a pipe joint 800, and the other end of the fresh air duct 700 extends to the outdoor environment to communicate with the outdoor environment. When the fresh air module 200 works, outdoor fresh air enters from the fresh air pipe 700, enters the fresh air duct of the housing 300 through the fresh air inlet 301, is purified by the purification assembly 500 in the fresh air duct, and is blown out through the fresh air outlet 302.

For the rat guard 900, the rat guard 900 may be installed at the fresh air inlet 301, may be installed inside the fresh air duct 700, or may be installed at the air inlet of the fresh air duct 700. As for the specific shape and structure of the rat guard 900, there are various design ways, and it is only required that the rat guard 900 can shield the small mouse animal, but not air. Such as but not limited to: the ratproof accessory 900 is a spring member having a spiral radius gradually decreasing, or a grid net or a mesh cover having mesh holes, etc. As will be described in more detail below.

According to the technical scheme, the rat-proof accessory 900 is arranged at the fresh air inlet 301 of the fresh air module 200 or on the fresh air pipe 700, so that external rat and mouse small animals are shielded by the rat-proof accessory 900, the small animals are prevented from entering the fresh air module 200 from the fresh air pipe 700 through the fresh air inlet 301, the internal environment or internal components of the fresh air module 200 are prevented from being damaged by the small animals, and the normal use of the fresh air module 200 is ensured.

Referring to fig. 4 to 6, in an embodiment, the rat guard 900 is not easily assembled in consideration of the narrow fresh air inlet 301. Accordingly, the rat guard 900 can be installed on the fresh air duct 700. As for the position of the rat-proof accessory 900 in the fresh air duct 700, the rat-proof accessory 900 may be disposed at one end of the fresh air duct 700 close to the fresh air inlet 301, may be disposed at the middle of the fresh air duct 700, and may be disposed at one end of the fresh air duct 700 far from the fresh air inlet 301. Specifically, in this embodiment, the rat guard 900 is disposed at an end of the fresh air duct 700 away from the fresh air inlet 301.

To facilitate the assembly of the ratproof accessory 900 with the fresh air duct 700, optionally, the ratproof accessory 900 includes a main body 910 and a blocking portion 920 configured at one end of the main body 910, wherein the blocking portion 920 is adapted to block the small mouse animal and allow air to enter; the main body 910 is sleeved on the outer peripheral wall of the fresh air duct 700, and the blocking portion 920 extends from the main body 910 to the air inlet pipe opening 720 of the fresh air duct 700.

When installing protection against rodents accessory 900 on new tuber pipe 700, aim at new tuber pipe 700 cover with the main part 910 of protection against rodents accessory 900 and put for the main part 910 cover of protection against rodents accessory 900 is in the outside of new tuber pipe 700, and then the application of force continues to push new tuber pipe 700 into the main part 910 of protection against rodents accessory 900, and meanwhile, the obstruction portion 920 of protection against rodents accessory 900 is pushed the air inlet pipe mouth department of new tuber pipe 700, in order to shelter from old and mouse class mouse and enter into new tuber pipe 700, and then can not enter into inside new trend module 200. That is to say, the rat-proof accessory 900 is assembled outside the fresh air duct 700, so that the assembling space is wide, the assembling difficulty is low, and the rat-proof accessory 900 can be conveniently assembled or disassembled.

Optionally, the blocking portion 920 of the rat guard 900 is designed in a spiral shape, and the spiral radius of the blocking portion 920 is gradually reduced to be disposed in a gathering shape. That is to say, the plurality of spiral rings of the blocking portion 920 are gradually reduced along the radial direction, and the plurality of spiral rings of the blocking portion 920 are matched to gradually reduce from the outer periphery of the air inlet pipe opening of the fresh air pipe 700 to the center of the air inlet pipe opening, so that small animals can be blocked from entering from the air inlet pipe opening of the fresh air pipe 700, a larger ventilation gap can be formed, and air inlet blocking is avoided.

Referring to fig. 4 to 6, in an embodiment, the main body 910 of the ratproof component 900 is sleeved and connected with the fresh air pipe 700, so that the main body of the ratproof component 900 may be in a sleeve shape. However, if the body portion 910 of the rodent-resistant kit 900 is formed in a sleeve shape, the contact area between the body portion 910 and the fresh air duct 700 is large, and the frictional resistance is also large, so that it is difficult to insert the fresh air duct 700 into the body portion 910 of the rodent-resistant kit 900 during assembly. Accordingly, the body 910 of the ratproof attachment 900 is also designed to be a coil spring and is spirally fitted to the outer peripheral wall of the fresh air duct 700. This reduces the friction force generated when the ratproof accessory 900 is fitted over the fresh air duct 700.

Since the diameters of the parts of the fresh air duct 700 are substantially the same, in order to make the main body portion 910 of the ratproof accessory 900 fit with the fresh air duct 700, optionally, the spiral radii of the main body portion 910 of the ratproof accessory 900 are substantially the same at all positions so as to fit with the fresh air duct 700. The body portion 910 of the rodent resistant fitting 900 may be integrally formed with the dam portion 920. For example, the ratproof fitting 900 is formed from the same material that is helically wound.

Further, a spiral rib 710 may be spirally formed on the outer circumferential wall of the fresh air duct 700, and the fresh air duct 700 is spirally inserted into the main body 910 of the ratproof attachment 900 through the spiral rib 710. During assembly, the main body part 910 of the ratproof accessory 900 is firstly sleeved on the fresh air duct 700, and then the ratproof accessory 900 is rotated, so that the fresh air duct 700 is gradually pushed into the main body part 910 of the ratproof accessory 900. At this time, the body 910 of the rat guard 900 is engaged with the spiral rib 710 of the fresh air duct 700, so that the movement of the rat guard 900 in the axial direction of the fresh air duct 700 can be restricted, and the rat guard 900 is not easily detached from the fresh air duct 700.

Based on the above embodiment, the rat-proof fitting 900 is optionally made of an elastic material, so that the rat-proof fitting 900 has elasticity. Thus, when the ratproof accessory 900 is assembled, the ratproof accessory 900 is sleeved on the fresh air duct 700 through elastic deformation, and the elastic potential energy accumulated by the ratproof accessory 900 is applied to the fresh air duct 700, so that the ratproof accessory 900 is tightly sleeved on the fresh air duct 700 and is not easy to loosen.

Based on any one of the above embodiments, the fresh air module 200 further includes a protective sleeve, and the protective sleeve is sleeved on the outer side of the fresh air pipe 700. The protective sleeve may be made of a flexible thermal insulation material to protect the spiral ribs 710 of the fresh air duct 700 from abrasion.

Referring to fig. 7 and 8, based on any of the above embodiments, the fresh air module 200 further includes a fan assembly 400, and the fan assembly 400 is installed in the fresh air duct. Specifically, the fan assembly 400 is installed in an air outlet cavity of the fresh air duct, the fan assembly 400 includes a centrifugal wind wheel 410 and a motor 420, one end of the centrifugal wind wheel 410 is connected with the motor 420, and the other end of the centrifugal wind wheel 410 forms an air inlet end and corresponds to the air vent 610 of the middle partition plate 600. During assembly, the motor 420 can be mounted on the bottom shell 310, and then the centrifugal wind wheel 410 is mounted on the bottom shell 310 in the same direction and connected with the motor 420; and then the middle barrier 600 and the cover are installed in sequence. That is, the motor 420 and the centrifugal wind wheel 410 can be mounted on the bottom shell 310 from the same side of the bottom shell 310, for example, the centrifugal wind wheel and the bottom shell 310 are screwed together at the same side, so that the assembling direction does not need to be adjusted repeatedly, and the assembling efficiency is improved.

Referring to fig. 7 and 8, in an embodiment, the fresh air module 200 further includes a purification assembly 500, and the purification assembly 500 is mounted on the middle partition 600 and covers the ventilation hole 610 of the middle partition 600 to correspond to the air inlet end of the centrifugal wind wheel 410. When the fresh air module 200 works, the motor 420 drives the centrifugal wind wheel 410 to be started, the centrifugal wind wheel 410 drives fresh air to enter the air inlet cavity from the fresh air inlet 301, the fresh air is firstly purified into relatively clean fresh air by the purification component 500, then the clean fresh air enters the interior of the centrifugal wind wheel 410 from the air inlet end thereof, is radially thrown out to the fresh air outlet 302 by the centrifugal wind wheel 410, and finally is blown out from the fresh air outlet 302.

Since the purifying assembly 500 is disposed on the middle partition 600, the space in the front side of the middle partition 600 is relatively large, so that the purifying surface for allowing the air of the purifying assembly 500 to pass through to be purified is correspondingly designed to be relatively large, thereby improving the efficiency of increasing the air purifying efficiency of the purifying assembly 500. In addition, since the purge assembly 500 is designed to be relatively large, the amount of air that can be purged by the purge assembly 500 is correspondingly increased, and thus the life of the purge assembly 500 can be prolonged, and the period for replacing the purge assembly 500 can be prolonged.

As to the structure of the purification assembly 500, there may be various designs without limitation. Such as but not limited to: the purge assembly 500 includes a mounting bracket 510 and a purge member 520 (shown in FIG. 8) mounted to the mounting bracket 510. The purifying member 520 may be adapted to remove any one or more of dust, fine particles, microorganisms, organic volatile gases (such as formaldehyde, etc.), and other air pollutants in the air. The specific type of the purifying member 520 can be selected according to the function thereof, and the purifying member 520 can be any one or combination of a common filter screen, a HEPA (high efficiency particulate air) screen, a formaldehyde remover and an IFD (inlet-flow separator); and the filter screen can also be any one or combination of a plurality of primary filter screens, intermediate filter screens and high-efficiency filter screens.

Referring to fig. 1 to 3, the present invention further provides an air conditioner 100, wherein the air conditioner 100 includes a casing 110 and a fresh air module 200 installed in the casing 110. The specific structure of the fresh air module 200 refers to the above embodiments, and since the air conditioner 100 adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here. The air conditioner 100 may be any one of a wall-mounted air conditioner indoor unit, a cabinet air conditioner indoor unit, an air unit, a ceiling air conditioner indoor unit, or a mobile air conditioner. The air conditioner 100 will be described below as an example of a wall-mounted air conditioner indoor unit.

In one embodiment, the housing 110 has an inlet 101, a first outlet 102, and a second outlet 103; wherein, the air inlet 101 is communicated with the first air outlet 102. The fresh air module 200 is installed in the machine shell 110, the air inlet cavity 331 of the fresh air module 200 is suitable for being communicated with the outdoor environment through the fresh air pipe 700, and the air outlet cavity 332 of the fresh air module 200 is suitable for being communicated with the second air outlet 103. Thus, the air conditioner 100 has an indoor air circulation mode and a fresh air mode, in which:

in the indoor air circulation mode, air in an indoor environment enters the inside of the machine shell 110 through the air inlet 101, forms cold air or hot air after heat exchange is performed through the heat exchange assembly in the machine shell 110, and then is blown back to the indoor environment from the first air outlet 102, so that indoor air circulation is realized;

in the fresh air mode, air in the outdoor environment enters the fresh air module 200 through the fresh air pipe 700, is purified by the purification component 500 of the fresh air module 200 to form clean fresh air, and is blown to the second air outlet 103 of the casing 110 from the fresh air outlet 302 of the fresh air module 200, and is blown to the indoor environment from the second air outlet 103, so that fresh air is supplemented to the indoor environment.

Optionally, the casing 110 includes a chassis 111, a face frame 112 and a panel 113, and an end of the panel 113 is provided with a second air outlet 103; the fresh air module 200 is installed at the end of the chassis 111, and the fresh air outlet 302 of the fresh air module 200 corresponds to the second air outlet 103, so that the air conditioner 100 sends out fresh air forward, and the fresh air accurately reaches the position of the user.

In addition, in order to avoid the direct blowing of fresh air to the user, the second air outlet 103 can be optionally formed by a plurality of micropores penetrating through the panel 113, so that after the fresh air is blown out of the micropores, the air flow is broken into a strand of small filament air flow, the air speed is reduced, the air flow becomes soft, the air flow cannot be directly blown to the user, and the user is prevented from generating uncomfortable feeling.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. The utility model provides a new trend module which characterized in that, new trend module includes:

the fresh air inlet is communicated with the fresh air outlet;

one end of the fresh air pipe is suitable for being communicated with the fresh air inlet, and the other end of the fresh air pipe is suitable for being communicated with an outdoor environment; and

the rat-proof accessory is arranged at the fresh air pipe or the fresh air inlet;

the rat-proof accessory comprises a main body part and a blocking part constructed at one end of the main body part, wherein the main body part is of a spiral structure.

2. The fresh air module as claimed in claim 1, wherein the body portion is disposed around the peripheral wall of the fresh air duct.

3. The fresh air module as claimed in claim 2, wherein the peripheral wall of the fresh air duct is configured with a spiral rib spirally disposed, and the fresh air duct is spirally nested with the main body of the ratproof fitting through the spiral rib.

4. The fresh air module as claimed in claim 1, wherein the main body portion is disposed at an end of the fresh air duct away from the fresh air inlet.

5. The fresh air module as claimed in claim 1, wherein the blocking portion of the ratproof fitting is designed in a spiral spring shape.

6. The fresh air module as recited in claim 5, wherein the blocking portion extends from the main body portion to an air inlet duct opening of the fresh air duct.

7. The fresh air module as claimed in claim 6, wherein the spiral radius of the baffle portion is gradually reduced to form a gathering shape.

8. The fresh air module as claimed in any one of claims 1 to 7, wherein the ratproof fitting is made of an elastic material so that the ratproof fitting has elasticity; and/or the presence of a gas in the atmosphere,

the main body part and the blocking part are integrally formed.

9. The fresh air module as claimed in any one of claims 1 to 7, further comprising a protective sleeve, wherein the protective sleeve is sleeved outside the fresh air duct.

10. An air conditioner, characterized in that the air conditioner comprises:

the air conditioner comprises a shell, a first air outlet and a second air outlet, wherein the shell is provided with an air inlet, the first air outlet and the second air outlet, and the air inlet is communicated with the first air outlet;

the fresh air module as claimed in any one of claims 1 to 9, wherein the fresh air module is mounted in the housing, the fresh air inlet of the fresh air module is adapted to communicate with the outdoor environment through a fresh air duct, and the fresh air outlet of the fresh air module is adapted to communicate with the second air outlet.