Fresh air device and duct type air conditioner

Abstract

The invention provides a fresh air device and a duct type air conditioner, and the fresh air device comprises an air duct which is used for guiding outdoor fresh air into a room; the check valve assembly is connected with the air duct, and at least part of the check valve assembly can move relative to the air duct so as to open and close the air duct; and the detection device is used for detecting the position of the check valve assembly so as to judge the opening and closing state of the air duct.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and more specifically, relates to a fresh air device and an air duct unit. Background Art

[0002] The duct unit can draw fresh air from outdoor into indoor space through pipes for fresh air ventilation. When the duct unit is turned off, the humid outdoor air can flow back into the duct unit. The mixing of humid outdoor air and indoor air can easily cause condensation risk. The duct unit is prone to malfunction when condensation occurs. Summary of the invention

[0003] In view of this, the present invention provides a fresh air device and an air duct machine to solve the technical problem of how to reduce the failure rate of the fresh air device.

[0004] The technical solution of the present invention is achieved in this way:

[0005] An embodiment of the present invention provides a fresh air device, comprising:

[0006] Air duct, used to introduce outdoor fresh air into the room;

[0007] a check valve assembly connected to the air duct, wherein at least a portion of the check valve assembly can move relative to the air duct to open and close the air duct;

[0008] The detection device is used to detect the position of the check valve assembly to determine the open and closed state of the air duct.

[0009] In some embodiments, the fresh air device further comprises:

[0010] The controller is used to determine whether the valve of the fresh air device is in an open state when it is in the startup state, and if not, a fault prompt is issued; and is used to determine whether the valve of the fresh air device is in an open state when it is in the shutdown state, and if so, a fault prompt is issued.

[0011] In some embodiments, the check valve assembly includes:

[0012] A support frame, wherein a first through passage is formed inside the support frame, and the first passage is connected to the air duct;

[0013] a valve, disposed in the first channel and movably connected to the support frame;

[0014] A driving member is fixed to the support frame and is disposed outside the first channel. The driving member is connected to the valve to drive the valve to open and close the first channel.

[0015] In some embodiments, the detection device comprises:

[0016] A first detection member, used to detect whether the valve is closed;

[0017] The second detection member is used to detect whether the valve is open.

[0018] In some embodiments, the first detection member and / or the second detection member is configured as a travel switch.

[0019] In some embodiments, the support frame is provided with a first end wall at one end of the first channel, the first end wall encloses a first opening of the first channel, and a second opening of the first channel is provided opposite to the first opening; when the valve closes the first channel, the valve is in contact with the first end wall.

[0020] In some embodiments, the support frame is provided with a first side wall surrounding the first channel, the extension direction of the first side wall is consistent with the extension direction of the first channel, the first detection member is fixed to the first side wall, and the second detection member is fixed to the first end wall.

[0021] In some embodiments, the driving member is connected to the valve via a driving shaft, and the driving shaft is fixed to an edge of the valve.

[0022] In some embodiments, it also includes:

[0023] A box body, wherein the air duct is arranged in the box body, and a fresh air outlet is arranged at one end of the air duct; the check valve assembly is arranged in the box body, and the check valve assembly is connected to the fresh air outlet to open and close the fresh air outlet;

[0024] A steering pipe is at least partially disposed outside the box body and connected to the check valve assembly. The steering pipe is used to introduce fresh air into the air duct. The steering pipe is bent inside to change the direction of the introduced fresh air.

[0025] In some embodiments, the check valve assembly is fixed to the inner wall surface of the box.

[0026] In some embodiments, the first opening is connected to the fresh air outlet, the second opening is connected to the steering tube, and when the valve closes the first channel, the valve contacts a side of the first end wall close to the first channel to close the first opening; wherein the drive member axially abuts against the opening of the support frame for passing the drive shaft.

[0027] In some embodiments, the first opening is connected to the steering tube, the second opening is connected to the fresh air outlet, and when the valve closes the first channel, the valve contacts a side of the first end wall close to the first channel to close the first opening.

[0028] In some embodiments, the air duct and the box body are detachably arranged, and the check valve assembly is detachably connected to the fresh air inlet.

[0029] In some embodiments, the check valve assembly further comprises:

[0030] A sealing sponge covers the valve surface to seal the first channel;

[0031] and / or,

[0032] Sealing silicone is arranged around the edge of the valve to seal the first channel.

[0033] In some embodiments, the steering tube is configured as an L-shaped structure, and one end of the steering tube connected to the check valve assembly is configured as a symmetrical joint.

[0034] The embodiment of the present invention further provides a duct machine, comprising:

[0035] A fresh air device according to any one of the above items.

[0036] The embodiment of the present invention provides a fresh air device and an air duct machine, wherein the fresh air device includes an air duct, a check valve assembly and a detection device, wherein the air duct is used to introduce outdoor fresh air into the room, the check valve assembly is connected to the air duct, and at least a portion of the check valve assembly can move relative to the air duct to open and close the air duct, and the detection device is used to detect the position of the check valve assembly to determine the open and closed state of the air duct. The embodiment of the present invention sets a detection device, and the detection device detects the position of the check valve assembly in real time to determine the open and closed state of the check valve assembly, and can directly determine whether the operating state of the check valve assembly is normal according to the state of fresh air conduction, so that the cause of equipment failure can be promptly checked to reduce the risk of failure of the fresh air device as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A three-dimensional diagram of a fresh air device according to an embodiment of the present invention;

[0038] Figure 2 An exploded view of a check valve assembly according to an embodiment of the present invention;

[0039] Figure 3 A three-dimensional diagram of a check valve assembly according to an embodiment of the present invention;

[0040] Figure 4 A three-dimensional diagram of a check valve assembly according to another embodiment of the present invention;

[0041] Figure 5 A cross-sectional schematic diagram of a check valve assembly according to another embodiment of the present invention;

[0042] Figure 6Another cross-sectional schematic diagram of a check valve assembly according to another embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the structure of a fresh air device according to an embodiment of the present invention;

[0044] Figure 8 is a cross-sectional schematic diagram of a fresh air device according to an embodiment of the present invention;

[0045] Fig. 9 A schematic diagram of disassembling some components of a fresh air device according to an embodiment of the present invention;

[0046] Fig.10 This is a side view of some components of the fresh air device after being disassembled according to an embodiment of the present invention.

[0047] Description of reference numerals:

[0048] 1. Box body; 11. Air duct; 12. Fresh air outlet; 13. Inner wall; 2. Check valve assembly; 21. Support frame; 211. First channel; 212. First end wall; 213. First opening; 214. Second opening; 215. First side wall; 22. Valve; 221. Edge; 23. Drive member; 24. Drive shaft; 251. First detection member; 252. Second detection member; 26. Sealing sponge; 27. Sealing silicone; 28. Mounting frame; 29. ​​Mounting frame sponge; 3. Steering tube; 4. Fresh air duct; 5. Wall; 6. Rainproof joint; 7. Fan; 8. Filter assembly; 9. Inspection panel. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] The various specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction, for example, different embodiments and technical solutions can be formed by combining different specific technical features. In order to avoid unnecessary repetition, various possible combinations of the specific technical features in the present invention will not be described separately.

[0051] In the following description, the terms "first\second\..." are only used to distinguish different objects, and do not mean that the objects have the same or related points. It should be understood that the directions "above", "below", "outside" and "inside" are all directions in normal use, and the directions "left" and "right" refer to the left and right directions shown in the corresponding schematic diagrams, which may or may not be the left and right directions in normal use.

[0052] It should be noted that the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element. "Multiple" means greater than or equal to two.

[0053] The embodiment of the present invention provides a fresh air device, which can be applied to a duct air conditioner. It should be noted that the application scenario type of the embodiment of the present invention does not limit the structure of the fresh air device of the embodiment of the present invention. Among them, the duct air conditioner is a kind of air conditioner, also known as a duct air conditioner, an air conditioner duct air conditioner or a duct air conditioner, etc. The duct air conditioner is often used in restaurants, central office buildings, and single-family villas. The duct air conditioner includes a connected indoor unit and an outdoor unit, which adopts an air outlet form similar to that of a central air conditioner, and has the advantages of a large air supply area and a range pipe. Compared with the traditional wall-mounted air conditioner, it has a soft air supply when cooling, and the air flow line is smooth, and the constant temperature is also better. The indoor unit of the duct air conditioner is usually suspended on the ceiling in the form of a ceiling. Therefore, the aesthetic appearance of the air conditioner is also improved. Due to the above advantages of the duct air conditioner, more and more users choose to install the duct air conditioner in the living room or dining room. However, the existing duct has a large number of internal parts, which is inconvenient to install, and the maintenance process is also cumbersome. The duct unit can draw fresh air from outdoor into indoor space through pipes for fresh air exchange. However, when the actual humidity of outdoor air is much higher than that of indoor air, if the duct unit is not turned on for fresh air exchange, it cannot prevent the humid air from outdoor from flowing back into the duct unit. The mixing of humid air from outdoor and indoor air can easily cause condensation risk, and the duct unit is prone to malfunction when condensation occurs.

[0054] like Figure 1 , Figure 7 and Figure 8 As shown, an embodiment of the present invention provides a fresh air device, which includes a box body 1, a check valve assembly 2 and a steering pipe 3. The box body 1 can be installed in the ceiling in the form of a suspended ceiling. An air duct 11 is arranged in the box body 1, and the air duct 11 is used to introduce fresh air into the room. A fresh air outlet 12 is arranged at one end of the air duct 11, and the fresh air outlet 12 is used to introduce fresh air into the fresh air device. The other end of the air duct 11 can export the fresh air introduced by the fresh air outlet 12 to the room. The structure of the air duct 11 in the embodiment of the present invention does not limit the function of the air duct 11.

[0055] like Figure 8As shown, the check valve assembly 2 is arranged in the housing 1, rather than being arranged outside the housing 1, nor being arranged in other components outside the housing 1, for example, Figure 1 As shown, the steering tube 3 in the embodiment of the present invention connects the check valve assembly 2 and the fresh air duct 4, the fresh air duct 4 is connected to the outside of the wall 5, and the fresh air duct 4 can be used to introduce fresh air from the outside of the wall 5 to the fresh air device. A rainproof joint 6 is also provided on the outside of the wall 5, and the rainproof joint 6 can be used to protect the fresh air duct 4 to reduce the risk of rainwater being introduced from the fresh air duct 4 to the fresh air device. The steering tube 3 in the embodiment of the present invention is connected to the check valve assembly 2 at one end and to the fresh air duct 4 at the other end. The fresh air duct 4 is located outside the box 1, and the check valve assembly 2 is located inside the box 1. Therefore, the steering tube 3 can be partially located inside the box 1, and the other part is located outside the box 1, or the steering tube 3 can be completely located outside the box 1. No matter how the steering tube 3 is set, it will not affect the position of the check valve assembly 2 in the embodiment of the present invention. That is to say, the check valve assembly 2 is set inside the box 1 and will not be affected by the setting of the steering tube 3.

[0056] The bend inside the steering tube 3 in the embodiment of the present invention changes the direction of the fresh air introduced into the steering tube, increases the resistance of the fresh air flowing inside the steering tube 3, and thus reduces the risk of the steering tube 3 backflowing wet and cold air into the air duct. In addition, the steering tube 3 in the embodiment of the present invention changes the direction of the fresh air flow, which facilitates the assembly flexibility of the box body 1 and the ceiling or wall.

[0057] The check valve assembly 2 in the embodiment of the present invention is connected to the fresh air outlet 12 of the air duct 11, and the check valve assembly 2 is used to open and close the fresh air outlet 12. When the check valve assembly 2 opens the fresh air outlet 12, the fresh air outlet 12 is connected to the steering tube 3, and the steering tube 3 can introduce the fresh air into the air duct through the fresh air outlet 12; when the check valve assembly 2 closes the fresh air outlet 12, the fresh air outlet 12 is disconnected from the steering tube 3, and the fresh air outside or inside the steering tube 3 cannot flow into the air duct. Thereby, the risk of backflow of wet and cold gas can be reduced in the non-wind-guiding state.

[0058] It should be noted that the structure of the check valve assembly 2 in the embodiment of the present invention will not limit the function of the check valve assembly 2 to open and close the fresh air outlet 12. The check valve assembly 2 in the embodiment of the present invention can achieve the function of opening and closing the fresh air outlet 12 in a variety of ways. For example, in some embodiments, the check valve assembly switches the opening and closing state of the fresh air outlet by driving the valve in the check valve assembly 2 to move horizontally and / or rotate relative to the fresh air outlet 12. The valve of the above-mentioned check valve assembly can also be set in a variety of forms. For example, the valve can be in the form of a grid louver, or the valve can be in the form of two parts. The forms of implementation of the check valve assembly in the embodiment of the present invention include but are not limited to the several methods described above, as long as the check valve assembly can achieve the opening and closing of the fresh air outlet.

[0059] The existing duct air conditioners are mainly integrated, and the after-sales maintenance of duct air conditioners is a big problem. For example, when the duct air conditioner is not working, it is easy for wet and cold air to flow back, causing condensation in the fresh air component, thereby increasing the failure rate of the fresh air component. Or, when there is internal leakage such as wear, puncture, and breakage of the heat exchanger or pipeline, since the individual parts cannot be disassembled, most of the after-sales maintenance methods in the industry are to directly replace the internal unit of the duct air conditioner, resulting in unnecessary cost losses.

[0060] An embodiment of the present invention provides a fresh air device, which includes a box, a check valve assembly and a steering pipe. An air duct is provided in the box, and a fresh air outlet is provided at one end of the air duct. The check valve assembly is arranged in the box, and the check valve assembly is connected to the fresh air outlet to open and close the fresh air outlet. The steering pipe is connected to the check valve assembly, and the steering pipe is used to introduce fresh air into the air duct. The embodiment of the present invention facilitates the control of the opening and closing of the fresh air outlet by arranging the check valve assembly between the air duct of the box and the steering pipe, so that the introduction and shutoff of the fresh air can be controlled according to the working state of the fresh air device, which is conducive to reducing the risk of backflow of outdoor cold air when the fresh air device is not working, so as to further reduce the risk of condensation failure of the fresh air device. In addition, the check valve assembly in the embodiment of the present invention is arranged inside the box. Compared with being arranged outside the box, the box can protect the check valve assembly to reduce the risk of damage to the check valve assembly during maintenance and disassembly. Moreover, the check valve assembly is arranged inside the box. During the maintenance process, the maintenance personnel can directly disassemble the air duct in the box. After the air duct is disassembled, the box has a larger maintenance space for the check valve assembly, thereby reducing the difficulty of maintenance of the check valve assembly and also reducing the maintenance cost of the fresh air device.

[0061] In some embodiments, Figure 2 As shown, the check valve assembly 2 includes a support frame 21, a valve 22 and a drive member 23. The support frame 21 supports and fixes the entire check valve assembly 2. The support frame 21 can be used to support other components of the check valve assembly 2 and can also fix the check valve assembly 2 inside the box body 1. The support frame 21 is fixed to the inner wall surface 13 of the box body 1, and combined with the inner wall surface 13 of the box body 1, the support frame 21 can be fixed to the inner wall surface 13 of the box body 1. Figure 3-Figure 5 As shown, a first through channel 211 is formed inside the support frame 21, and both ends of the first channel 211 are open. The opening at one end of the first channel 211 is connected to the fresh air outlet 12 of the air duct inside the box body 1 (refer to Figure 8As shown), the other end of the first channel 211 is connected to the steering tube 3. The valve 22 is arranged in the first channel 211, and the valve 22 is movably connected to the support frame 21. The movably connected manner of the valve 22 and the support frame 21 in the embodiment of the present invention includes rotation and / or translation. The driving member 23 is fixed to the support frame 21, and the driving member 23 is arranged outside the first channel 211, which is conducive to reducing the interference of the driving member on the airflow in the first channel 211. The driving member 23 is connected to the valve 22, and the driving member 23 is used to drive the valve 22 to open and close the first channel 211. The embodiment of the present invention does not limit the specific form of the driving member 23. For example, the driving member can be a stepping motor, or a cylinder, etc. The driving member can drive the valve 22 to rotate and / or translate, as long as the valve 22 can open and close the first channel 211 during the movement.

[0062] It should be noted that the inner wall surface 13 of the box body 1 represents the wall surface of the box body 1 forming the internal accommodation space, and the accommodation space is used to accommodate the air duct and the check valve assembly. The check valve assembly 2 is fixed to the inner wall surface 13 of the box body 1 to improve the stability of the installation of the check valve assembly 2. It is also beneficial to increase the spatial size of the assembly of the check valve assembly and the box body, thereby increasing the utilization space of the air duct in the box, so as to further improve the ventilation efficiency of the fresh air device.

[0063] In some embodiments, Figure 2 As shown, the check valve assembly 2 can be fixed to the inner wall surface 13 of the box body 1 by means of a mounting bracket 28. The fixing methods include but are not limited to bolt fixing, welding, and clamping with clips. The embodiment of the present invention uses a mounting bracket 28 to fix the check valve assembly 2 and the box body 1, which is beneficial to reducing the difficulty of assembling the check valve assembly 2 and the box body 1, and is also beneficial to improving the utilization rate of the internal space of the box body.

[0064] In some embodiments, Figure 2 As shown, the check valve assembly 2 also includes a mounting frame sponge 29, which is arranged on the side of the mounting frame 28 away from the inner wall surface 13, and the mounting frame sponge 29 is arranged between the mounting frame 28 and the support frame 21, which is beneficial to reducing the gap between the mounting frame and the support frame 21, thereby improving the sealing performance between the first channel and the air duct, and reducing the risk of humid and cold gas backflow into the air duct.

[0065] In some embodiments, Figure 2-Figure 5As shown, the driving member 23 is connected to the valve 22 through the driving shaft 24, and the driving shaft 24 is fixed to the edge 221 of the valve 22. The driving member 23 in the embodiment of the present invention is set as a stepping motor, and the driving member 23 drives the valve 22 to rotate around the axial direction of the driving shaft 24, and the driving shaft 24 is fixed to the edge of the valve 22, so that each position in the valve 22 roughly follows the driving shaft 24 to rotate around the same direction. It should be noted that the edge 221 of the valve represents the area near the boundary of the valve 22, and the valve boundary is the position where the valve and the outside meet. The embodiment of the present invention sets the driving shaft at the edge 221 of the valve, so that the valve can directly and independently close the first channel, reduce the interference of the driving shaft and the driving member on the valve closing the first channel, which is conducive to improving the sealing of the valve closing the first channel, so as to further reduce the risk of condensation in the fresh air device.

[0066] In some embodiments, Figure 3 and Figure 4 They respectively represent two opening and closing modes of the valve 22 and the support frame 21. Figure 3 It is an outward-opening type. Figure 4 It is an inward-opening type, and the above two forms can realize the opening and closing of the first channel.

[0067] Reference Figure 3 As shown, the support frame 21 is provided with a first end wall 212 at one end of the first channel 211, and the first end wall 212 encloses a first opening 213 of the first channel 211, and the first channel 211 is provided with a second opening 214 opposite to the first opening 213. The valve 22 is rotatably arranged in the first channel 211, and the driving member 23 drives the driving shaft 24 to rotate, thereby driving the valve 22 to rotate in the first channel 211, and the size of the first channel 211 opened by the valve 22 is adjusted by rotating the valve 22 at different angles. When the extension direction of the valve 22 is perpendicular to the extension direction of the first channel 211, the valve 22 closes the first channel 211, and the valve 22 blocks the gas flow at the opposite ends of the first channel 211. In this state, the valve 22 contacts the first end wall 212, so that the valve 22 closes the first opening 213. The embodiment of the present invention provides a first end wall at one end of the first channel, which is beneficial to increasing the contact area between the valve 22 and the support frame 21 in the extension direction of the channel, while reducing the gap between the valve 22 and the support frame 21. At the same time, the resistance of gas flowing through the gap between the valve 22 and the support frame 21 is increased, thereby improving the airtightness of the valve closing the first channel.

[0068] In some embodiments, Figure 3As shown, a sealing sponge 26 is provided on one side of the valve 22. When the driving member 23 drives the valve 22 to rotate toward the first opening 213, the sealing sponge 26 contacts the first end wall 212 before the valve 22. The driving member 23 continues to drive the valve 22 to rotate toward the first opening 213, so that the valve 22 and the first end wall 212 are pressed against the sealing sponge 26 to be compressed and deformed. The compressed sealing sponge 26 fills the gap between the valve 22 and the first end wall 212, thereby improving the sealing performance of the valve 22 in closing the first opening 213.

[0069] The following describes two opening and closing methods of the valve 22 and the support frame 21. Figure 3 The outer opening type is shown, which means that when the valve 22 opens the first channel 211, the end of the valve 22 away from the drive shaft 24 approaches the end close to the steering tube, the first opening 213 is connected to the fresh air outlet of the air duct, and the second opening 214 is connected to the steering tube. When the first channel is open, the fresh air flows from the steering tube to the second opening 214, and then flows into the air duct from the first opening 213 of the first channel. When the valve 22 closes the first channel 211, the valve 22 contacts the side of the first end wall 212 close to the first channel 211, wherein the first end wall 212 is arranged at the end of the first channel 211, and the first end wall 212 has two opposite sides in the extension direction of the first channel, one side of which is close to the first channel 211, and the other side is away from the first channel 211 and close to the fresh air outlet of the air duct. When the valve 22 in the embodiment of the present invention closes the first opening 213, the valve 22 abuts against the side of the first end wall 212 close to the first channel 211 (when the valve 22 is provided with the sealing sponge 26, the sealing sponge 26 abuts against the side of the first end wall 212 close to the first channel 211). In this embodiment, there is a certain gap between the driving member 23, the driving shaft 24 and the support frame 21. When the valve 22 closes the first opening 213, the residual fresh air gas in the first channel 211 will flow from the gap to the inside of the box. In the embodiment of the present invention, the driving member abuts against the opening of the support frame for passing the driving shaft in the axial direction. By abutting and assembling the end faces of the driving member 23 and the support frame 21, the gap between the two is sealed, thereby reducing the risk of residual gas flowing into the box from the gap.

[0070] In the embodiment of the present invention, the valve is set to be outward-opening. When the fresh air device is turned off, the valve 22 closes the first opening 213, and the external gas flows to the valve 22 through the fresh air duct. The airflow is blocked by the valve outside the air duct. The airflow impacts the valve 22 and presses the first end wall 212 tightly, so that the valve 22 tightly closes the first opening 213, thereby improving the sealing of the fresh air device when it is turned off, thereby reducing the risk of cold air backflow into the fresh air device.

[0071] Reference Figure 4The inner opening type is shown, which means that when the valve 22 opens the first channel 211, the end of the valve 22 away from the drive shaft 24 approaches the end of the fresh air outlet close to the air duct, the first opening 213 is connected to the steering tube, and the second opening 214 is connected to the fresh air outlet. When the first channel is open, the fresh air flows from the steering tube to the first opening 213, and then flows into the air duct from the second opening 214 of the first channel 211. When the valve 22 closes the first channel 211, the valve 22 contacts the side of the first end wall 212 close to the first channel 211, wherein the first end wall 212 is arranged at the end of the first channel 211, and the first end wall 212 has two opposite sides in the extension direction of the first channel, one side of which is close to the first channel 211, and the other side is away from the first channel 211 and close to the steering tube. When the valve 22 in the embodiment of the present invention closes the first opening 213, the valve 22 abuts against the side of the first end wall 212 close to the first channel 211 (when the valve 22 is provided with the sealing sponge 26, the sealing sponge 26 abuts against the side of the first end wall 212 close to the first channel 211). The valve 22 can completely close the first opening 213. After closing the first opening 213, it can directly block the fresh air from entering the first channel 211. The inward-opening valve installation method will not leave fresh air in the first channel. The driving member and the driving shaft are both located on the side of the first opening away from the steering tube. Therefore, only the first opening 213 needs to be sealed to seal the entire first channel, and the airflow will not flow into the box through the gap between the driving member and the driving shaft.

[0072] In some embodiments, Figure 5 As shown, the check valve assembly 2 also includes a detection device (refer to Figure 5The first detection member 251 and the second detection member 252 shown in the figure are arranged in the first channel 211, and the detection device is used to detect the position of the valve 22. Specifically, the opening and closing state of the valve 22 in the embodiment of the present invention is related to the working state of the fresh air device. When the fresh air device is in working state, the fresh air device needs to introduce fresh air from the outside into the room, or the fresh air device needs to discharge the gas from the room to the outside. When the fresh air device is in working state, the first channel needs to be opened for air flow conduction, so the valve needs to be set at the position of opening the first channel. When the fresh air device is turned off, it is not necessary to transmit the indoor and outdoor gases through the fresh air device, so the valve needs to be set at the position of closing the first channel to reduce the risk of cold air backflowing into the fresh air device. Therefore, the position of the valve set in the fresh air device under different working states is different. If the position of the valve setting does not match the working state of the fresh air device, it is easy to increase the risk of failure of the fresh air device. Therefore, the embodiment of the present invention sets a detection device, which is used to detect the position of the valve 22. Specifically, the detection device is used to detect whether the valve 22 opens or closes the first channel. If the position of the valve 22 detected by the detection device is wrong, it indicates that the check valve assembly is faulty. If the detection device detects that the position of the valve is correct, the check valve assembly is normal. The embodiment of the present invention can directly understand the position of the valve through the setting of the detection device, so as to directly obtain whether the state of the check valve assembly is normal, which is conducive to the user to directly troubleshoot the fault factors, further improve the maintenance efficiency, and also help to reduce the risk of further damage to the fresh air device.

[0073] It should be noted that the embodiments of the present invention do not limit the specific type of the detection device. For example, the detection device may be a proximity switch, an infrared sensor, a photosensitive sensor, etc. The detection device in the embodiments of the present invention may be set in a manner including but not limited to the above-mentioned methods, as long as the detection device can detect the position of the valve. Furthermore, the embodiments of the present invention do not limit the location of the detection device. For example, the detection device may be set on the inner side of the support frame, or the detection device may be set on the valve. Regardless of the location of the detection device, as long as the detection device can detect the relative position between the valve and the first opening, it may be set.

[0074] In some embodiments, Figure 5 As shown, Figure 5 for Figure 4 The support frame 21 is provided with a first side wall 215 which encloses the first channel 211. The extension direction of the first side wall 215 is consistent with the extension direction of the first channel (both along Figure 5The detection device includes a first detection member 251, which is fixed to the first side wall 215, and is used to detect whether the valve 22 is closed. Take the first detection member 251 as a travel switch as an example for explanation. When the valve 22 rotates to close the first opening 213, the edge 221 of the valve 22 is close to the first detection member 251, or the edge 221 of the valve 22 blocks the first detection member 251. In other words, the first detection member 251 can detect that the edge 221 of the valve 22 rotates to a position close to the first detection member 251. In this state, the first detection member 251 can detect that the valve 22 is in a state of closing the first opening 213. When the valve 22 moves to open the first opening 213, the edge 221 of the valve 22 is away from the first detection member 251, and the first detection member 251 cannot detect the edge 221, thereby judging that the valve is in a position of opening the first opening 213. The embodiment of the present invention judges whether the valve is closed by the first detection member, so as to judge whether the working state of the valve is abnormal.

[0075] In some embodiments, Figure 5 As shown, the detection device may further be provided with a second detection member 252, which is fixed to a side of the first end wall 212 close to the first channel 211, and is used to detect whether the valve 22 is open. The detection principle of the second detection member 252 is similar to that of the first detection member 251, so it is not repeated here. When the second detection member 252 detects the edge 221 of the valve 22, it indicates that the valve 22 is in a state of opening the first opening 213, and when the second detection member 252 does not detect the edge of the valve 22, it indicates that the valve 22 is in a state of closing the first opening 213. The embodiment of the present invention determines whether the valve is open by the second detection member, so as to determine whether the working state of the valve is abnormal.

[0076] In some embodiments, Figure 5 As shown, the first detection member 251 and the second detection member 252 can be set at the same time, and the detection results of the first detection member 251 and the second detection member 252 can be combined to judge the working state of the valve, so as to further improve the accuracy of the judgment structure, and in the case where one of the detection members is damaged, the other detection member can still meet the detection conditions for standby, which is conducive to reducing the frequency of maintenance and reducing maintenance costs. The first detection member and / or the second detection member in the embodiment of the present invention can be set as a travel switch. The switch can directly detect the position of the valve rotation, and the detection method is simple and the cost is low.

[0077] In some embodiments, the fresh air device further includes a controller, and the controller is used to determine whether the valve of the fresh air device is in an open state when it is in a startup state, and if not, a fault prompt is issued; the controller is also used to determine whether the valve of the fresh air device is in an open state when it is in a shutdown state, and if so, a fault prompt is issued. The present invention is an embodiment that determines whether the working state of the fresh air device matches the position of the detected valve through the controller. If they match, it indicates that the valve state is normal, and if they do not match, it indicates that the valve state is abnormal. The judgment data can be directly fed back to the user through the judgment of the controller, so that the user can directly understand the operating state of the internal components of the fresh air device, which is convenient for the user to quickly troubleshoot, improve maintenance efficiency, and reduce maintenance costs.

[0078] In some embodiments, in combination Figure 7 and Figure 8 As shown, the air duct 11 and the box body 1 are detachably arranged, and the check valve assembly 2 is detachably connected to the fresh air inlet 12. Fig. 9 and Fig.10 As shown, the following describes the inspection process of the check valve assembly. Fig. 9 The figure shows an exploded view of the fresh air device in the order of disassembly and assembly during the maintenance process, wherein area a represents the maintenance area of ​​the fresh air device, and the maintenance staff can disassemble and repair the components in the fresh air device from one side of the maintenance area a. Fig. 9 From top to bottom, the filter assembly 8, the inspection plate 9 and the air duct 11 are arranged in sequence. During the disassembly process, the filter assembly 8 is first disassembled from the fresh air device, then the inspection plate 9 is removed, and then the air duct 11 is disassembled. Fig.10 As shown, after the air duct 11 is removed from the fresh air device, a large maintenance space is provided, and the check valve assembly 2 is exposed in the maintenance space. The check valve assembly 2 can be directly maintained in the maintenance space without removing the check valve assembly 2 from the fresh air device.

[0079] The air duct 11 and the box body 1 in the embodiment of the present invention are detachably arranged, which is beneficial to reducing the maintenance cost and difficulty of the fresh air device. The space after removing the air duct 11 can be used as a maintenance space for the check valve assembly. The check valve assembly can be directly repaired without removing the entire box body from the ceiling, which reduces the cost and difficulty of repairing the check valve assembly and improves maintenance efficiency.

[0080] In some embodiments, Figure 2 As shown, the check valve assembly also includes a sealing sponge 26, the sealing sponge 26 covers the surface of the valve 22, and the sealing sponge 26 is used to seal the first channel; wherein, referring to Figure 3 As shown, the sealing sponge 26 can be arranged only on one side close to the first end wall 212, which can reduce material costs while playing a sealing role.

[0081] In some embodiments, the check valve assembly may also be provided with a sealing silicone 27, which is provided around the edge of the valve 22, or the sealing silicone 27 may be provided around the first opening 213 on the first end wall 212, and the sealing silicone 27 is used to seal the gap between the valve 22 and the first end wall 212, thereby sealing the first channel.

[0082] In some embodiments, Figure 1 As shown, the steering tube 3 is set to an L-shaped structure, and one end of the steering tube 3 connected to the check valve assembly is set to a symmetrical joint. Among them, the L-shaped structure means that the steering tube 3 is composed of at least two parts, and the extension directions of the two parts are roughly perpendicular, so that the airflow conducted inside the steering tube needs to turn. The embodiment of the present invention sets the steering tube to be L-shaped, which, on the one hand, is conducive to hindering the guidance of the airflow and increasing the resistance of the airflow conduction to reduce the risk of cold air backflow into the fresh air device. On the other hand, the bending setting of the steering tube is conducive to improving the installation flexibility of the fresh air device and improving the installation flexibility of the fresh air device and the ceiling or wall. In addition, the end of the steering tube connected to the check valve assembly is set to a symmetrical joint. Regardless of whether the check valve assembly is set on the left or right side of the box, the symmetrical joint can use the position of the check valve assembly and the position of the wall, thereby improving the versatility of the steering tube.

[0083] The embodiment of the present invention further provides a duct machine, comprising the fresh air device described in any of the above embodiments. The fresh air device comprises a housing, a check valve assembly and a steering pipe. An air duct is provided in the housing, and a fresh air outlet is provided at one end of the air duct. The check valve assembly is arranged in the housing, and the check valve assembly is connected to the fresh air outlet to open and close the fresh air outlet. The steering pipe is connected to the check valve assembly, and the steering pipe is used to introduce fresh air into the air duct. The embodiment of the present invention facilitates the control of the opening and closing of the fresh air outlet by arranging a check valve assembly between the air duct of the housing and the steering pipe, so that the introduction and shutoff of the fresh air can be controlled according to the working state of the fresh air device, thereby facilitating the reduction of the risk of backflow of outdoor cold air when the fresh air device is not working, so as to further reduce the risk of condensation failure of the fresh air device. In addition, the check valve assembly in the embodiment of the present invention is arranged inside the box. Compared with being arranged outside the box, the box can protect the check valve assembly to reduce the risk of damage to the check valve assembly during maintenance and disassembly. Moreover, the check valve assembly is arranged inside the box. During the maintenance process, the maintenance personnel can directly disassemble the air duct in the box. After the air duct is disassembled, the box has a larger maintenance space for the check valve assembly, thereby reducing the difficulty of maintenance of the check valve assembly and also reducing the maintenance cost of the duct machine.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A fresh air device, characterized in that: include: Air duct, used to introduce outdoor fresh air into the room; a check valve assembly connected to the air duct, wherein at least a portion of the check valve assembly can move relative to the air duct to open and close the air duct; The detection device is used to detect the position of the check valve assembly to determine the open and closed state of the air duct.

2. The fresh air device according to claim 1, characterized in that: The fresh air device also includes: The controller is used to determine whether the valve of the fresh air device is in an open state when it is in the startup state, and if not, a fault prompt is issued; and is used to determine whether the valve of the fresh air device is in an open state when it is in the shutdown state, and if so, a fault prompt is issued.

3. The fresh air device according to claim 1, characterized in that: The check valve assembly comprises: A support frame, wherein a first through passage is formed inside the support frame, and the first passage is connected to the air duct; a valve, disposed in the first channel and movably connected to the support frame; A driving member is fixed to the support frame and is disposed outside the first channel. The driving member is connected to the valve to drive the valve to open and close the first channel.

4. The fresh air device according to claim 3, characterized in that: The detection device comprises: A first detection member, used to detect whether the valve is closed; The second detection member is used to detect whether the valve is open.

5. The fresh air device according to claim 4, characterized in that: The first detection member and / or the second detection member is configured as a travel switch.

6. The fresh air device according to claim 4, characterized in that: The support frame is provided with a first end wall at one end of the first channel, the first end wall encloses a first opening of the first channel, and a second opening of the first channel is provided opposite to the first opening; when the valve closes the first channel, the valve contacts the first end wall.

7. The fresh air device according to claim 6, characterized in that: The support frame is provided with a first side wall surrounding the first channel, the extension direction of the first side wall is consistent with the extension direction of the first channel, the first detection member is fixed to the first side wall, and the second detection member is fixed to the first end wall.

8. The fresh air device according to any one of claims 1 to 6, characterized in that: The driving member is connected to the valve via a driving shaft, and the driving shaft is fixed to the edge of the valve.

9. The fresh air device according to claim 6, characterized in that: Also includes: A box body, wherein the air duct is arranged in the box body, and a fresh air outlet is arranged at one end of the air duct; the check valve assembly is arranged in the box body, and the check valve assembly is connected to the fresh air outlet to open and close the fresh air outlet; A steering pipe is at least partially disposed outside the box body and connected to the check valve assembly. The steering pipe is used to introduce fresh air into the air duct. The steering pipe is bent inside to change the direction of the introduced fresh air.

10. The fresh air device according to claim 9, characterized in that: The check valve assembly is fixed to the inner wall surface of the box body.

11. The fresh air device according to claim 9, characterized in that: The first opening is connected to the fresh air inlet, and the second opening is connected to the steering tube. When the valve closes the first channel, the valve contacts the side of the first end wall close to the first channel to close the first opening; wherein the drive member axially abuts against the opening of the support frame for passing the drive shaft.

12. The fresh air device according to claim 9, characterized in that: The first opening is connected to the steering pipe, the second opening is connected to the fresh air outlet, and when the valve closes the first channel, the valve contacts a side of the first end wall close to the first channel to close the first opening.

13. The fresh air device according to claim 9, characterized in that: The air duct and the box body are detachably arranged, and the check valve assembly is detachably connected to the fresh air inlet.

14. The fresh air device according to claim 2, characterized in that: The check valve assembly also includes: A sealing sponge covers the valve surface to seal the first channel; and / or, Sealing silicone is arranged around the edge of the valve to seal the first channel.

15. The fresh air device according to claim 9, characterized in that: The steering tube is configured as an L-shaped structure, and one end of the steering tube connected to the check valve assembly is configured as a symmetrical joint.

16. A duct machine, characterized in that: include: A fresh air device according to any one of claims 1 to 15.

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