Fresh air unit and air conditioning device

Abstract

The invention discloses a fresh air unit and an air conditioning device.The fresh air unit comprises a fan assembly, an air duct shell and a valve assembly, and the fan assembly is correspondingly provided with an air inlet end and an air outlet end; the air duct shell covers the fan assembly to form an air inlet cavity and an air outlet cavity and is provided with an outer air inlet duct, an inner air inlet duct, an outer air outlet duct and an inner air outlet duct, the outer air inlet duct and the outer air outlet duct are used for communicating with the outdoor environment, and the inner air inlet duct and the inner air outlet duct are used for communicating with the indoor environment; the valve assembly comprises a first valve and a second valve, a first position and a second position for closing the inner air inlet duct and the outer air inlet duct respectively are arranged on the moving stroke of the first valve, the second valve is used for opening and closing the outer air outlet duct, and the valve assembly further comprises a driving assembly capable of driving the first valve and the second valve together. The problem that an existing air duct valve driving mode is high in cost is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of fresh air systems, and in particular to a fresh air unit and an air conditioning device. Background Art

[0002] In recent years, more and more people have been keeping doors and windows closed for long periods of time and staying in closed indoor areas. The poor indoor air circulation has led to a poor indoor air environment for a long time, affecting people's normal life activities. Therefore, people's demand for indoor air quality has increased. With the introduction of fresh air systems, people's needs in this scenario can be met.

[0003] In the fresh air system, the air valve is mainly used to control the air door, so that the fresh air system can realize different purification working modes such as suction, exhaust, and internal circulation, and achieve the effect of purifying indoor air without opening doors and windows. However, in the existing fresh air system, each air valve requires a separate drive device for drive control, which occupies a large space and is costly. There is an urgent need for an integrated drive method to reduce the use of the drive device while ensuring the normal opening and closing of the air valve of the fresh air system, so as to reduce the space occupied by the drive device and reduce the cost. Summary of the invention

[0004] The main purpose of the present invention is to provide a fresh air unit and an air conditioning device, aiming to solve the problem of high cost of existing air duct valve driving methods.

[0005] To achieve the above object, the present invention provides a fresh air unit, wherein the fresh air unit comprises:

[0006] The fan assembly is provided with an air inlet end and an air outlet end;

[0007] An air duct housing is provided on the fan assembly to form an air inlet cavity located at the air inlet end of the fan assembly and an air outlet cavity located at the air outlet end of the fan assembly, and the air duct housing is provided with an outer air inlet duct and an inner air inlet duct connected to the air inlet cavity, and an outer air duct and an inner air outlet duct connected to the air outlet cavity, the outer air inlet duct and the outer air duct are used to communicate with the outdoor environment, and the inner air inlet duct and the inner air outlet duct are used to communicate with the indoor environment; and,

[0008] A valve assembly includes a first valve arranged in the air inlet chamber and a second valve arranged in the air outlet chamber. The first valve has a first position and a second position for closing the inner air inlet duct and the outer air inlet duct respectively in its movable stroke. The second valve is used to open and close the outgoing air duct. The valve assembly also includes a driving assembly that can drive the first valve and the second valve together, so that when the first valve is in the first position, the second valve closes the outgoing air duct; when the first valve is in the second position, the second valve opens the outgoing air duct.

[0009] Optionally, the first valve and the second valve respectively include a first baffle plate and a second baffle plate rotatably installed in the air duct housing, and the driving assembly can drive the first baffle plate and the second baffle plate to rotate together.

[0010] Optionally, the driving assembly includes a driving member and a transmission assembly, the transmission assembly is drivingly connected to the first baffle and the second baffle, and the driving end of the driving member is drivingly connected to the rotating shaft of the first baffle or the second baffle.

[0011] Optionally, one of the end of the rotating shaft and the driving end is provided with a receiving groove, and the other is provided with a matching portion, and the matching portion extends into the receiving groove to engage with the receiving groove to prevent rotation.

[0012] Optionally, the transmission assembly includes a transmission gear set.

[0013] Optionally, the transmission gear set includes two transmission gears which are respectively arranged at the rotation shafts of the first baffle plate and the second baffle plate, and the two transmission gears are meshed with each other.

[0014] Optionally, the two transmission gears are both configured as full gears, and their gear ratio corresponds to the ratio of the rotation angles of the first baffle plate to the second baffle plate; or,

[0015] The one with the larger rotation angle between the first baffle and the second baffle is drive-connected to the driving member, and the transmission gear above it is configured as a partial tooth gear so that it has an engagement section that engages with the other transmission gear and a disengaged unloaded section, and the length of the engagement section is configured to correspond to the one with the smaller rotation angle between the first baffle and the second baffle.

[0016] Optionally, a through hole is provided on the inner wall of the external air inlet duct to connect with the air outlet cavity, and the second valve is arranged at the through hole, so that when the second valve opens the through hole, the external air inlet duct partially forms the outgoing air duct.

[0017] Optionally, a baffle assembly is provided in the external air inlet duct, and the baffle assembly divides the external air inlet duct into a first air duct and a second air duct. The through hole is opened on the inner wall of the second air duct so that the second air duct partially forms the outgoing air duct.

[0018] Optionally, when the driving component drives the second valve to open the through hole, the second valve closes the second air duct.

[0019] Optionally, the fan assembly includes a turbine fan.

[0020] Optionally, the inner air outlet duct is arranged along the tangential direction of the turbine blower.

[0021] Optionally, the valve assembly further includes a third valve disposed in the air outlet cavity, and the third valve is used to open and close the inner air outlet duct.

[0022] The present invention also proposes an air conditioning device, wherein the air conditioning device comprises a fresh air unit, the fresh air unit comprises a fan assembly, an air duct housing and a valve assembly, the fan assembly is correspondingly provided with an air inlet end and an air outlet end; the air duct housing is covered on the fan assembly to form an air inlet cavity located at the air inlet end of the fan assembly and an air outlet cavity located at the air outlet end of the fan assembly, and the air duct housing is provided with an outer air inlet duct and an inner air inlet duct connected to the air inlet cavity, and an outer air duct and an inner air outlet duct connected to the air outlet cavity, the outer air inlet duct and the outer air duct are used to communicate with the outdoor environment, and the inner air inlet duct is connected to the inner air outlet cavity The air outlet duct is used to communicate with the indoor environment; the valve assembly includes a first valve arranged in the air inlet chamber and a second valve arranged in the air outlet chamber, and the first valve has a first position and a second position for closing the inner air inlet duct and the outer air inlet duct respectively in its active stroke, and the second valve is used to open and close the outgoing air duct. The valve assembly also includes a driving assembly that can drive the first valve and the second valve together, so that when the first valve is in the first position, the second valve closes the outgoing air duct; when the first valve is in the second position, the second valve opens the outgoing air duct.

[0023] In the technical solution of the present invention, the fresh air unit is mainly composed of the fan assembly and the air duct shell to form the inner air inlet duct, the inner air outlet duct, the outer air inlet duct and the outer air duct. It is well known that the fresh air unit can have three mode states, including fresh air mode, exhaust mode and purification mode, and the valve assembly controls the opening and closing of the above-mentioned multiple air ducts to achieve switching between the above-mentioned three modes. Specifically, when in the fresh air mode, it is necessary to introduce external air into the closed room, so the inner air inlet duct and the outer air duct need to be closed; when in the exhaust mode, it is necessary to exhaust indoor air to the outside, so the inner air inlet duct and the outer air duct need to be opened; when in the purification mode, it is necessary to introduce indoor air into the fresh air unit and use the purification device to purify it and then export it to the room again, so it is necessary to open the inner air inlet duct and close the outer air duct. Outer air duct, but at this time, because the inner air outlet duct is generally the main air outlet duct of the fresh air unit, when the inner air outlet duct and the outer air duct are opened at the same time, the wind blown out by the fan assembly is still mainly blown out by the inner air outlet duct, and the opening of the outer air duct has little effect on the normal air outlet of the inner air outlet duct. Therefore, in the purification mode, the outer air duct can also be opened synchronously. In this way, in the above three modes, the opening and closing states of the outer air duct and the inner air inlet duct are consistent. Therefore, in the present application, the first valve corresponding to the inner air inlet duct and the second valve corresponding to the outer air duct are set to be driven together by the drive assembly, that is, the first valve and the second valve are driven to move at the same time by the drive assembly. Compared with separately setting a drive structure for separate driving, the synchronous drive method adopted in the present application can reduce the setting of the drive structure to reduce its space occupancy and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 A three-dimensional schematic diagram of a partial structure of an embodiment of a fresh air unit provided by the present invention;

[0026] Figure 2 for Figure 1 Explosion diagram of

[0027] Figure 3 for Figure 1 A partial cross-sectional perspective schematic diagram of the fresh air unit;

[0028] Figure 4 for Figure 1 A three-dimensional schematic diagram of a partial structure of a fresh air unit;

[0029] Figure 5 for Figure 1 A schematic plan view of an active angle of the first embodiment of the transmission gear set and some of its related structures;

[0030] Figure 6 for Figure 5 A plan view of another active angle of the transmission gear set;

[0031] Figure 7 for Figure 1 A three-dimensional exploded schematic diagram of a second embodiment of a transmission gear set and some of its related structures;

[0032] Figure 8 for Figure 7 A planar flow diagram of the transmission gear set in the process of opening the second valve;

[0033] Fig. 9 for Figure 7 A three-dimensional flow chart of the transmission gear set in the process of opening the second valve.

[0034] Description of Figure Numbers:

[0035]

[0036]

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] In recent years, more and more people have been keeping doors and windows closed for long periods of time and staying in closed indoor areas. The poor indoor air circulation has led to a poor indoor air environment for a long time, affecting people's normal life activities. Therefore, people's demand for indoor air quality has increased. With the introduction of fresh air systems, people's needs in this scenario can be met.

[0042] In the fresh air system, the air valve is mainly used to control the air door, so that the fresh air system can realize different purification working modes such as suction, exhaust, and internal circulation, and achieve the effect of purifying indoor air without opening doors and windows. However, in the existing fresh air system, each air valve requires a separate drive device for drive control, which occupies a large space and is costly. There is an urgent need for an integrated drive method to reduce the use of the drive device while ensuring the normal opening and closing of the air valve of the fresh air system, so as to reduce the space occupied by the drive device and reduce the cost.

[0043] In view of this, the present invention provides a fresh air unit. Figures 1 to 9 The embodiment of the fresh air unit provided by the present invention will be described below in conjunction with specific drawings.

[0044] See also Figures 1 to 9The fresh air unit 1000 includes a fan assembly 1, an air duct housing 2 and a valve assembly 3, wherein the fan assembly 1 is correspondingly provided with an air inlet end 11 and an air outlet end 12; the air duct housing 2 is covered on the fan assembly 1 to form an air inlet cavity 21 located at the air inlet end 11 of the fan assembly 1 and an air outlet cavity 22 located at the air outlet end 12 of the fan assembly 1, and the air duct housing 2 is provided with an outer air inlet duct 23 and an inner air inlet duct 24 connected to the air inlet cavity 21, and an outer air duct 25 and an inner air outlet duct 26 connected to the air outlet cavity 22, the outer air inlet duct 23 and the outer air duct 25 are used to communicate with the outdoor environment, and the inner air inlet duct 24 and the inner air outlet duct 26 are used to communicate with the indoor environment; The valve assembly 3 includes a first valve 31 arranged in the air inlet chamber 21 and a second valve 32 arranged in the air outlet chamber 22. The first valve 31 has a first position and a second position for closing the inner air inlet duct 24 and the outer air inlet duct 23 respectively in its movable stroke. The second valve 32 is used to open and close the outgoing air duct 25. The valve assembly 3 also includes a driving assembly 33 that can drive the first valve 31 and the second valve 32 together, so that when the first valve 31 is at the first position, the second valve 32 closes the outgoing air duct 25; when the first valve 31 is at the second position, the second valve 32 opens the outgoing air duct 25.

[0045] In the technical solution of the present invention, the fresh air unit 1000 is mainly composed of the fan assembly 1 and the air duct housing 2 to form the inner air inlet duct 24, the inner air outlet duct 26, the outer air inlet duct 23 and the outer air duct 25. As is well known, the fresh air unit 1000 can have three mode states, including fresh air mode, exhaust mode and purification mode, and the valve assembly 3 controls the opening and closing of the above-mentioned multiple air ducts to achieve switching between the above-mentioned three modes. Specifically, when in the fresh air mode, it is necessary to introduce external air into the closed room, so the inner air inlet duct 24 and the outer air duct 25 need to be closed; when in the exhaust mode, it is necessary to exhaust indoor air to the outside, so the inner air inlet duct 24 and the outer air duct 25 need to be opened; when in the purification mode, it is necessary to introduce indoor air into the fresh air unit 1000 and use the provided purification device to purify it and then export it back to the room, so it is necessary to open the inner air inlet duct 24 and close the outer air duct 25, but at this time, because the inner air outlet 26 is generally the main air outlet of the fresh air unit 1000, when the inner air outlet 26 and the outer air duct 25 are opened at the same time, the wind blown out by the fan assembly 1 is still mainly blown out by the inner air outlet 26, and the opening of the outer air duct 25 has little effect on the normal air outlet of the inner air outlet 26. Therefore, in the purification mode, the outer air duct 25 can also be opened synchronously. In this way, in the above three modes, the opening and closing states of the outer air duct 25 and the inner air inlet duct 24 are consistent. Therefore, in the present application, the first valve 31 corresponding to the inner air inlet duct 24 and the second valve 32 corresponding to the outer air duct 25 are set to be driven together by the drive assembly 33, that is, the first valve 31 and the second valve 32 are driven to move at the same time by the drive assembly 33. Compared with separately setting a drive structure for separate driving, the synchronous drive method adopted in the present application can reduce the setting of the drive structure to reduce its space occupancy and reduce costs.

[0046] In addition, in the above three modes, the outer air inlet duct 23 and the inner air inlet duct 24 are opened selectively. Under conventional settings, the outer air inlet duct 23 and the inner air inlet duct 24 can be opened and closed by two valves respectively. In the present application, by setting the structure of the air duct shell 2, the outer air inlet duct 23 and the inner air inlet duct 24 are set to be staggered and opened and closed by the two position states of the first valve 31, which meets the opening and closing requirements of the outer air inlet duct 23 and the inner air inlet duct 24 while reducing the use of valves and further reducing the use of the driving member 331, so as to further reduce its space occupancy and reduce costs.

[0047] Specifically, the first valve 31 and the second valve 32 include a first baffle 31a and a second baffle 32a that are rotatably mounted in the air duct housing 2, respectively, and the driving assembly 33 can drive the first baffle 31a and the second baffle 32a to rotate together. The first valve 31 and the second valve 32 can be set as a pull-out translation structure, so as to have a closed state of extending into and covering the cross-section of the inner air inlet duct 24 and the outer air duct 25, and an open state of being out of the inner air inlet duct 24 and the outer air duct 25, and the first valve 31 and the second valve 32 can also be driven together by the transmission structure in the driving assembly 33. In this embodiment, the first valve 31 and the second valve 32 are correspondingly set as the first baffle 31a and the second baffle 32a that are rotatably mounted in the air duct housing 2, so that the driving assembly 33 does not need to move linearly, and its driving end only needs to rotate to drive the first baffle 31a and the second baffle 32a to rotate, and the driving stroke is small and the occupied volume is small.

[0048] Furthermore, the driving assembly 33 includes a driving member 331 and a transmission assembly 332. The transmission assembly 332 is connected to the first baffle 31a and the second baffle 32a in a driving manner. The driving end of the driving member 331 is connected to the rotating shaft of the first baffle 31a or the second baffle 32a in a driving manner. The driving assembly 33 is configured as a matching structure of the driving member 331 and the transmission assembly 332 to meet the requirement of driving the first baffle 31a and the second baffle 32a together. The specific configuration of the transmission assembly 332 can be that the driving member 331 is connected to the first baffle 31a and the second baffle 32a respectively. However, in the present embodiment, the driving member 331 is directly connected to one of the first baffle 31a or the second baffle 32a in a driving manner, and then the transmission assembly 332 is set between the first baffle 31a and the second baffle 32a. The driving member 331 directly drives one of the first baffle 31a and the second baffle 32a, and then the transmission component 332 transmits power to the other of the first baffle 31a and the second baffle 32a, so as to realize the driving of the first baffle 31a and the second baffle 32a together. In this way, the driving member 331 can be directly connected to the first baffle 31a or the second baffle 32a, which has a simple structure, reduces power loss in the transmission process, and also reduces fluctuations in the transmission process, so that the structure of the driving component 33 is simpler and the operation is more stable.

[0049] Furthermore, one of the end of the shaft and the driving end is provided with a receiving groove 34, and the other is provided with a matching portion 35, and the matching portion 35 extends into the receiving groove 34 to engage with the receiving groove 34 to prevent rotation. There are many ways of driving connection between the end of the shaft and the driving end. The more direct connection structure can be a fixed connection structure, that is, integral molding or bonding, so that the end of the shaft and the driving end form a synchronous integral structure, but it is obvious that the integral structure is not convenient for installation and disassembly, and the integral molding setting is obviously not a standard part, which needs to be customized and has a high cost. Therefore, in this embodiment, the receiving groove 34 is provided on one of the end of the rotating shaft and the driving end, and the matching portion 35 is provided on the other. The matching portion 35 mainly needs to be matched with the receiving groove 34 to realize the anti-rotation matching between the rotating shaft and the driving end. Therefore, the matching portion 35 can be set as a structure embedded in the receiving groove 34, that is, the matching of the matching portion 35 and the receiving groove 34 is set to an interference fit to meet the transmission requirements. On this basis, under the condition of long-term use or thermal expansion and contraction, the matching portion 35 and the receiving groove Relative rotational displacement may still occur between 34, which will cause insufficient driving stroke and further cause abnormal performance of the fresh air unit 1000. Therefore, in this embodiment, a groove is opened on the side wall of the accommodating groove 34, and correspondingly, a mating protrusion is convexly provided on the mating portion 35, so that when the mating portion 35 is embedded in the accommodating groove 34, the mating protrusion extends into the groove, thereby limiting the relative rotational displacement between the mating portion 35 and the accommodating groove 34, so as to solve the above-mentioned possible relative rotation problem and ensure the stability of the fresh air unit 1000.

[0050] Specifically, the transmission assembly 332 includes a transmission gear set 3321. The specific structure of the transmission assembly 332 can be various, including but not limited to a transmission belt transmission connection and a gear transmission connection. In this embodiment, the transmission gear set 3321 is directly used, which has a mature product, a simple structure, low cost, stable transmission performance, and a long service life.

[0051] Further, the transmission gear 3321 group includes two transmission gears 3321 respectively arranged at the rotating shafts of the first baffle 31a and the second baffle 32a, and the two transmission gears 3321 are meshed with each other. According to the specific position setting of the first baffle 31a and the second baffle 32a, the transmission gear 3321 group can increase or decrease the corresponding gears to meet the transmission between the first baffle 31a and the second baffle 32a, including but not limited to multi-gear connection drive over a longer distance and gear angle adjustment drive with angle deflection. However, it is obvious that the first baffle 31a and the second baffle 32a are arranged closer, and the transmission between the first baffle 31a and the second baffle 32a can be performed by only setting two transmission gears 3321 for meshing transmission, which is more stable and has lower cost. Therefore, in this embodiment, the positions of the first baffle 31a and the second baffle 32a are adjusted and set to meet the driving through direct meshing of the two transmission gears 3321, so as to obtain the above-mentioned beneficial effects.

[0052] Specifically, the two transmission gears 3321 are both set as full gears, and their gear ratio corresponds to the ratio of the rotation angles of the first baffle 31a and the second baffle 32a; or, the one with a larger rotation angle between the first baffle 31a and the second baffle 32a is drive-connected to the driving member 331, and the transmission gear 3321 above it is set as a partial tooth gear, so that it has an engagement section that engages with the other transmission gear 3321 and a disengaged unloaded section, and the length of the engagement section is set corresponding to the one with a smaller rotation angle between the first baffle 31a and the second baffle 32a. When the first valve 31 and the second valve 32 implement their closing and opening effects, the rotation angles in the fresh air unit 1000 are not necessarily the same. Therefore, when the driving component 33 drives the first valve 31 and the second valve 32 to rotate together, the difference in the rotation angles of the first valve 31 and the second valve 32 must also be considered. Specifically, two implementation modes are proposed in the present application. In the first embodiment, the transmission gears 3321 are all set as full gears. By adjusting the gear ratio between the two transmission gears 3321, the gear ratio is made consistent with the rotation angle ratio of the first valve 31 and the second valve 32, so that when the driving component 33 drives the first valve 31 and the second valve 32 together, the rotation angles of the first valve 31 and the second valve 32 are different. Such a setting obviously makes the transmission more stable. However, on the basis of the inconsistent rotation angles of the first valve 31 and the second valve 32, the sizes of the two transmission gears 3321 need to be set to be inconsistent, and the larger transmission gear 3321 must occupy a larger area. In the second embodiment, by 321 is set as a partial tooth gear, that is, the transmission gear 3321 that matches the one with a larger rotation angle between the first valve 31 and the second valve 32 is set as a partial tooth gear to form the meshing section and the idle section that mesh with the other transmission gear 3321, so that the meshing section meshes with the other transmission gear 3321, and can drive the valve matched with the other transmission gear 3321 to reach the required rotation angle, and then the idle section corresponds to the other transmission gear 3321, and the idle section no longer drives the other transmission gear 3321 to rotate, so that the valve corresponding to the other transmission gear 3321 is maintained at the rotation angle, and the valve corresponding to the partial tooth gear is driven by the driving member 331 to continue to rotate the required angle, so as to meet the use requirements under the condition that the rotation angles of the two valves are different. In this embodiment, when the idle section corresponds to the other transmission gear 3321, there is no matching relationship, which is obviously not stable, but it can also meet the requirements, and the sizes of the two transmission gears 3321 can be set to be consistent, so as to minimize the space occupied by the transmission gears 3321.Therefore, both of the above two embodiments can achieve the desired driving purpose at different angles, and both have their own advantages and disadvantages. The specific selection of which method is mainly based on actual design, manufacturing and use requirements, and is not limited here.

[0053] In addition, a through hole 231 is provided on the inner wall of the outer air inlet duct 23 to communicate with the air outlet chamber 22, and the second valve 32 is disposed at the through hole 231, so that when the second valve 32 opens the through hole 231, the outer air inlet duct 23 partially forms the outgoing air duct 25. The outer air inlet duct 23 and the outgoing air duct 25 are different from the inner air inlet duct 24 and the inner air outlet duct 26. Generally, when a user uses an air conditioning device, it must be installed indoors, rather than installed outdoors and connected to the indoors through a pipe. Therefore, the outer air inlet duct 23 and the outgoing air duct 25 must be longer than the inner air inlet duct 24 and the inner air outlet duct 26. If the outgoing air duct 25 and the outer air inlet duct 23 are independently set as two air ducts, the cost is obviously higher. In this embodiment, the specific structure of the fresh air unit 1000 is optimized. The external air inlet duct 23 is arranged to be adjacent to the air outlet cavity 22, and even the inner wall of the external air inlet duct 23 and the cavity wall of the air outlet cavity 22 are two sides of the same wall structure, and then they are opened up, that is, the through hole 231 is opened on the inner wall of the external air inlet duct 23. In this way, the second valve 32 is arranged at the through hole 231, so that the opening and closing of the external air duct 25 can be realized, which meets the functional requirements. The overall structure is cleverly arranged, and different usage states of the same air duct are used as the external air inlet duct 23 and the external air duct 25 respectively, which reduces the pipeline setting and reduces the cost.

[0054] Furthermore, a baffle assembly 232 is provided in the external air inlet duct 23, and the baffle assembly 232 separates the external air inlet duct 23 into a first air duct 233 and a second air duct 234. The through hole 231 is opened on the inner wall of the second air duct 234 so that the second air duct 234 partially forms the external air duct 25. With such arrangement, on the one hand, the wind blown out through the through hole 231 is guided outwardly through the baffle assembly 232, so as to avoid that when the second valve 32 does not close the external air inlet duct 23, the wind blown out through the through hole 231 will flow toward the external air inlet duct 23 corresponding to the end of the fresh air unit 1000, so as to avoid the wind force pushing and affecting the first valve 31 located in the second position to close the external air inlet duct 23. On the other hand, the first air duct 233 and the second air duct 234 are formed. When the first valve 31 is located in the first position to open the external air inlet duct 23, the path of the first air duct 233 is shorter, which can shorten the air flow path and improve the air intake efficiency.

[0055] Further, when the driving component 33 drives the second valve 32 to open the through hole 231, the second valve 32 closes the second air duct 234. When the baffle component 232 separates the external air inlet duct 23 into the first air duct 233 and the second air duct 234, the inner diameter of the second air duct 234 must be smaller than the inner diameter of the external air inlet duct 23, so that the size of the second valve 32 required to close the second air duct 234 is smaller than the size of the second valve 32 required to close the external air inlet duct 23, and the wind blown out through the through hole 231 will not flow toward the end of the external air inlet duct 23 corresponding to the inside of the fresh air unit 1000, so as to avoid the wind force pushing and affecting the first valve 31 located at the second position to close the external air inlet duct 23. At the same time, the size of the second valve 32 is smaller, easier to deploy and lower in cost. Although the second valve 32 cannot close the first air duct 233 at this time, the first air duct 233 extends toward the outdoors, and the air flow direction of the first air duct 233 and the second air duct 234 when serving as the outgoing air duct 25 is almost 180 degrees. It is difficult for the flowing air to blow in along the first air duct 233, so the thrust applied to the first valve 31 can be ignored, or no thrust is applied to the first valve 31 at all.

[0056] In addition, the fan assembly 1 includes a turbine fan. The fan assembly 1 can adopt a variety of mature fan structures available on the market, as long as it can achieve the air supply function required by this application, and is not limited here. In this embodiment, the fan assembly 1 is configured as the turbine fan, so that the fan assembly 1 can output a larger wind force in a smaller space, so on the basis of meeting the wind force size, the size of the fresh air unit 1000 can be further reduced.

[0057] Furthermore, the inner air outlet duct 26 is arranged along the tangent direction of the turbine fan. The above describes the primary and secondary functions of the inner air outlet duct 26 and the outer air duct 25. During the use of the fresh air unit 1000, the inner air outlet duct 26 is mainly used to discharge air to supply air to the room. Based on the structure of the turbine fan, in order to meet the above requirements, the inner air outlet duct 26 is arranged along the tangent direction of the turbine fan to obtain greater wind force.

[0058] In addition, the valve assembly 3 also includes a third valve 36 disposed in the air outlet cavity 22, and the third valve 36 is used to open and close the inner air outlet duct 26. Corresponding to the fresh air mode, exhaust mode and purification mode described above, in the fresh air mode, it is necessary to introduce external air into the closed room, so the inner air outlet duct 26 needs to be opened; in the exhaust mode, it is necessary to discharge indoor air to the outside, so the inner air outlet duct 26 needs to be closed; in the purification mode, it is necessary to inhale indoor air into the fresh air unit 1000 for purification and then send it back to the room, so the inner air outlet duct 26 needs to be opened. Therefore, in the use scenario of the fresh air unit 1000, the inner air outlet duct 26 also needs to be switched between the closed and open states, so the third valve 36 is provided to realize the opening and closing control of the inner air outlet duct 26 to meet the use requirements.

[0059] The present invention further provides an air conditioning device, the air conditioning device comprising a fresh air unit 1000, and the specific structure of the fresh air unit 1000 is referred to the above embodiment. Since the air conditioning device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0060] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A fresh air unit, characterized in that: include: The fan assembly is provided with an air inlet end and an air outlet end; An air duct housing is provided on the fan assembly to form an air inlet cavity located at the air inlet end of the fan assembly and an air outlet cavity located at the air outlet end of the fan assembly, and the air duct housing is provided with an outer air inlet duct and an inner air inlet duct connected to the air inlet cavity, and an outer air duct and an inner air outlet duct connected to the air outlet cavity, the outer air inlet duct and the outer air duct are used to communicate with the outdoor environment, and the inner air inlet duct and the inner air outlet duct are used to communicate with the indoor environment; and, A valve assembly includes a first valve arranged in the air inlet chamber and a second valve arranged in the air outlet chamber. The first valve has a first position and a second position for closing the inner air inlet duct and the outer air inlet duct respectively in its movable stroke. The second valve is used to open and close the outgoing air duct. The valve assembly also includes a driving assembly that can drive the first valve and the second valve together, so that when the first valve is in the first position, the second valve closes the outgoing air duct; when the first valve is in the second position, the second valve opens the outgoing air duct.

2. The fresh air unit according to claim 1, characterized in that: The first valve and the second valve respectively include a first baffle and a second baffle rotatably installed in the air duct housing, and the driving component can drive the first baffle and the second baffle to rotate together.

3. The fresh air unit according to claim 2, characterized in that: The driving assembly includes a driving member and a transmission assembly. The transmission assembly is drivingly connected to the first baffle and the second baffle. The driving end of the driving member is drivingly connected to the rotating shaft of the first baffle or the second baffle.

4. The fresh air unit according to claim 3, characterized in that: One of the end of the rotating shaft and the driving end is provided with a receiving groove, and the other is provided with a matching portion, and the matching portion extends into the receiving groove to match with the receiving groove to prevent rotation.

5. The fresh air unit according to claim 3, characterized in that: The transmission assembly includes a transmission gear set.

6. The fresh air unit according to claim 5, characterized in that: The transmission gear set includes two transmission gears which are respectively arranged at the rotation shafts of the first baffle plate and the second baffle plate, and the two transmission gears are meshed with each other.

7. The fresh air unit according to claim 6, characterized in that: The two transmission gears are both configured as full gears, and their gear ratio corresponds to the ratio of the rotation angles of the first baffle plate to the second baffle plate; or, The one with the larger rotation angle between the first baffle and the second baffle is drive-connected to the driving member, and the transmission gear above it is configured as a partial tooth gear so that it has an engagement section that engages with the other transmission gear and a disengaged unloaded section, and the length of the engagement section is configured to correspond to the one with the smaller rotation angle between the first baffle and the second baffle.

8. The fresh air unit according to claim 1, characterized in that: A through hole is provided on the inner wall of the external air inlet duct to communicate with the air outlet cavity, and the second valve is arranged at the through hole, so that when the second valve opens the through hole, the external air inlet duct partially forms the outgoing air duct.

9. The fresh air unit according to claim 8, characterized in that: A baffle assembly is arranged in the external air inlet duct, and the baffle assembly divides the external air inlet duct into a first air duct and a second air duct. The through hole is opened on the inner wall of the second air duct so that the second air duct partially forms the external air duct.

10. The fresh air unit according to claim 9, characterized in that: When the driving component drives the second valve to open the through hole, the second valve closes the second air duct.

11. The fresh air unit according to claim 1, characterized in that: The fan assembly includes a turbine fan.

12. The fresh air unit according to claim 11, characterized in that: The inner air outlet duct is arranged along the tangent direction of the turbine fan.

13. The fresh air unit according to claim 1, characterized in that: The valve assembly also includes a third valve disposed in the air outlet cavity, and the third valve is used to open and close the inner air outlet duct.

14. An air conditioning device, characterized in that: Comprising the fresh air unit as described in any one of claims 1-13.

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