Fresh air device and fresh air air conditioner

Abstract

The application provides a fresh air device and a fresh air air conditioner. The inside of a shell is provided with a first air cavity and a second air cavity. The shell wall of the shell is provided with an outdoor air inlet, an outdoor air outlet and an indoor air outlet. Two parts of a humidifying piece are respectively located in the first air cavity and the second air cavity. In a conventional fresh air mode, the outdoor air outlet is closed and the indoor air outlet is opened. The part of the humidifying piece located in the first air cavity is in a water absorbing state or an intermediate state, and the part located in the second air cavity is in an intermediate state. Outdoor fresh air flows through the outdoor air inlet, the first air cavity, the second air cavity and the indoor air outlet in sequence and flows to the indoor. In a humidifying fresh air mode, the outdoor air outlet and the indoor air outlet are both opened. The part of the humidifying piece located in the first air cavity is in a water absorbing state, and the part located in the second air cavity is in a water releasing state. After outdoor fresh air enters the first air cavity through the outdoor air inlet, a part of the outdoor fresh air flows to the outdoor through the outdoor air outlet, and the other part flows to the indoor through the second air cavity and the indoor air outlet in sequence.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning regulation technology, and particularly relates to a fresh air device and a fresh air air conditioner. Background Technology

[0002] As residents' living standards improve, consumers have increasingly higher demands for indoor air comfort. The traditional air conditioner's simple cooling and heating functions are no longer sufficient to meet user needs. Indoor air quality and relative humidity have become important indicators affecting comfort. Some existing fresh air conditioners improve air quality by introducing fresh outdoor air into the room. However, these fresh air conditioners usually only have a single air intake function and cannot humidify the introduced fresh air. As a result, in dry seasons or regions, the indoor air remains dry, leading to a poor user experience.

[0003] To address the problem of dry air, some fresh air systems have added humidification components. However, existing humidification components mostly use continuous water supply methods such as direct spraying or wet film evaporation, which can easily lead to uneven humidification, water mist, or bacterial growth. Moreover, their functions are relatively limited and cannot meet diverse fresh air needs. Summary of the Invention

[0004] In view of this, the present invention provides a fresh air device and a fresh air air conditioner to solve the problems of existing fresh air air conditioners that only have the function of ventilating air but cannot humidify the introduced fresh air, resulting in dry indoor air, and existing fresh air air conditioners with humidification function have uneven humidification or are prone to bacterial growth, and are difficult to meet diverse fresh air needs.

[0005] This invention provides a fresh air device, comprising: The casing has a first air chamber and a second air chamber inside. The casing wall has an outdoor air inlet, an outdoor air outlet and an indoor air supply outlet. The outdoor air inlet and the outdoor air outlet are both connected to the first air chamber. The first air chamber, the second air chamber and the indoor air supply outlet are connected in sequence. The humidifier has a portion located in the first air cavity and another portion located in the second air cavity; the humidifier has a water absorption state that absorbs moisture from the flowing air, a water release state that releases moisture into the flowing air, and an intermediate state that neither absorbs nor releases moisture. The fresh air device has a regular fresh air mode and a humidifying fresh air mode, and both the outdoor exhaust vent and the indoor air supply vent can be controlled to open and close. In the normal fresh air mode, the outdoor exhaust vent is closed and the indoor air supply vent is open. The portion of the humidifier located in the first air cavity is in a water absorption state or an intermediate state, and the portion located in the second air cavity is in an intermediate state. After the outdoor fresh air enters the first air cavity through the outdoor air inlet, it all flows into the room sequentially through the second air cavity and the indoor air supply vent. In the humidified fresh air mode, both the outdoor exhaust vent and the indoor air supply vent are open. The portion of the humidifier located in the first air cavity is in a water absorption state, and the portion located in the second air cavity is in a water release state. After the outdoor fresh air enters the first air cavity through the outdoor air inlet, a portion flows to the outside through the outdoor exhaust vent, and the other portion flows to the inside through the second air cavity and the indoor air supply vent in sequence.

[0006] Alternatively, the state of the humidifier is related to the temperature of the air flowing through it: When the temperature of the air flowing through the humidifier is less than or equal to the first preset temperature, the humidifier is in the water absorption state. When the temperature of the air flowing through the humidifier is greater than or equal to the second preset temperature, the humidifier is in the water release state; When the temperature of the air flowing through the humidifier is greater than the first preset temperature and less than the second preset temperature, or when the humidifier reaches saturation, the humidifier is in the intermediate state. Wherein, the first preset temperature is less than the second preset temperature.

[0007] Alternatively, the humidifier can be controlled to move, causing different parts of it to alternately enter the first air cavity and the second air cavity.

[0008] Optionally, the fresh air device further includes a heater; the heater is disposed at the connection between the first air cavity and the second air cavity, and is used to heat the fresh air entering the second air cavity from the first air cavity; The humidifier is configured to move in a ring around the heater, such that a portion of the humidifier is located in the first air cavity and another portion is located in the second air cavity.

[0009] Further optionally, a fan is provided at the outdoor air inlet, and the fan is located inside the first air cavity; the inlet of the fan is connected to the outdoor air inlet, and the outlet of the fan is connected to the first air cavity; Inside the first air cavity, a guide vane is provided between the outlet of the fan and the humidifier to guide the fresh air discharged by the fan to the humidifier.

[0010] Further optionally, in the conventional fresh air mode, the fan is in operation, the heater is in a stopped operation state, and the humidifier is in a stopped movement state; In the humidified fresh air mode, both the fan and the heater are in operation, and the humidifying element is in a circular motion.

[0011] Further optionally, a first valve is provided at the outdoor exhaust vent for opening and closing the outdoor exhaust vent or adjusting the opening degree of the outdoor exhaust vent; a second valve is provided at the indoor air supply vent for opening and closing the indoor air supply vent or adjusting the opening degree of the indoor air supply vent. In the conventional fresh air mode, the flow rate of fresh air into the room can be adjusted by adjusting the speed of the fan and / or the opening of the indoor air outlet. In the humidifying fresh air mode, the flow rate of fresh air into the room can be adjusted by adjusting the speed of the fan and / or the opening of the outdoor exhaust vent and / or the opening of the indoor supply vent.

[0012] Further optionally, the fresh air device further includes a conveyor belt, which is disposed around the outer periphery of the heater, with a portion of the conveyor belt located in the first air cavity and another portion located in the second air cavity; the conveyor belt can be controlled to circulate. The humidifying component is mounted on the conveyor belt and can move in a circular motion with the conveyor belt.

[0013] Further optionally, the fresh air device also includes a transmission mechanism, which includes a ring rack and a plurality of gears; The annular rack is disposed on the inner side of the conveyor belt, and the plurality of gears are disposed on the inner side of the annular rack. A portion of the gears are rotatably and spaced apart within the first air cavity, and another portion of the gears are rotatably and spaced apart within the second air cavity; each gear meshes with a ring rack. When one of the plurality of gears is controlled to rotate, the annular rack can carry the conveyor belt in a cyclical motion.

[0014] Further optionally, the circumferential axis of the conveyor belt's cyclic motion is parallel to the height direction of the housing; The transmission mechanism is provided in two parts, which are respectively located at both ends of the height direction of the housing; along the height direction of the housing, two gears located in the two transmission mechanisms and positioned opposite each other are connected by a rotating shaft.

[0015] Further optionally, the interior of the housing is provided with a partition, which divides the interior of the housing into a first air chamber and a second air chamber; the partition is provided with an opening, which connects the first air chamber and the second air chamber; The heater is located at the opening and on the side close to the second air chamber.

[0016] Further optionally, the humidifier has a porous structure and is made of at least one of zeolite, metal-organic framework materials and activated carbon.

[0017] Further optionally, the housing wall includes a first housing wall, a second housing wall and a third housing wall, the first housing wall and the second housing wall are disposed opposite to each other in the length direction of the housing, and the third housing wall connects the first housing wall and the second housing wall; The first shell wall is provided with the outdoor air inlet, the second shell wall is provided with the indoor air outlet, and the third shell wall is provided with the outdoor air outlet.

[0018] The present invention also provides a fresh air air conditioner, including an indoor unit, an outdoor unit body and any of the above-mentioned fresh air devices; the indoor unit is installed indoors, the outdoor unit body and the fresh air device are both installed outdoors, and the indoor air outlet and the indoor unit are connected through a fresh air duct.

[0019] Compared with the prior art, the main advantages of the present invention are as follows: (1) It overcomes the shortcomings of existing devices that can only deliver ordinary fresh air or humidified fresh air, and enables the device to flexibly adjust the fresh air mode according to the season, climate and user's physical needs, thereby improving the comfort of the indoor environment and the user's freedom of use. (2) The humidification process of fresh air does not require external water supply, water tank or manual water addition, avoiding the problem of bacterial and mold growth caused by water accumulation or long-term water retention in traditional humidification methods such as wet film and spray; this solution is especially suitable for long-term operation scenarios, which is conducive to maintaining the cleanliness and hygiene of indoor air, and is in line with the technical orientation of healthy building and low-carbon operation. (3) The first air chamber 151 and the second air chamber 152 can share the same fan, eliminating the need to set up two independent air intake systems to achieve the switching between ordinary fresh air and humidified fresh air; this greatly reduces the number of components such as fans, air ducts and seals, and reduces material costs, assembly costs and subsequent maintenance costs; (4) The fresh air introduction, airflow distribution and humidification functions are integrated into the same housing 1, which is compact and occupies little space. The humidification function and the fresh air function work together to actively regulate indoor humidity while introducing fresh air, which can effectively alleviate respiratory discomfort, dry skin and static electricity accumulation caused by dryness, thereby comprehensively improving indoor air quality and ease of use. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0022] Figure 1a and Figure 1b This is a schematic diagram of the assembly structure of an embodiment of the fresh air device (organic shell) provided by the present invention; Figure 2 This is a schematic diagram of the assembly structure of an embodiment of the fresh air device (without casing) provided by the present invention; Figure 3 This is a top view of the internal structure of an embodiment of the fresh air device provided by the present invention; Figure 4 This is a schematic diagram of the internal structure of the fresh air device provided by the present invention in a conventional fresh air mode. Figure 5 This is a schematic diagram of the internal structure of the fresh air device provided by the present invention in the humidification fresh air mode. In the picture: 1-Casing; 11-First casing wall; 111-Outdoor air inlet; 12-Second casing wall; 121-Indoor air outlet; 13-Third casing wall; 131-Outdoor exhaust outlet; 14-Baffle; 141-Opening; 151-First air chamber; 152-Second air chamber; 16-Heater; 21-Conveyor belt; 22-Humidifier; 23-Ring rack; 24-Gear; 25-Shaft; 3-Fan; 31-Inlet; 32-Outlet; 41-First valve; 42-First lead screw; 43-First nut; 44-First drive motor; 51-Second valve; 52-Second lead screw; 53-Second nut; 54-Second drive motor; 6-Air guide plate. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” used in the embodiments of this invention and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. “Multiple” generally includes at least two, but does not exclude the inclusion of at least one.

[0025] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0026] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0027] Existing fresh air conditioners that only have the function of ventilating air cannot humidify the introduced fresh air, resulting in dry indoor air and a poor user experience. Existing fresh air conditioners with humidification functions mostly use continuous water supply methods such as direct spraying or wet film evaporation, which can easily cause uneven humidification, water mist or bacterial growth, making it difficult to meet diverse fresh air needs. This invention creatively provides a fresh air device. The casing contains a first air chamber and a second air chamber. The casing wall has an outdoor air inlet, an outdoor air outlet, and an indoor air supply outlet. A portion of the humidifying element is located in the first air chamber, and another portion is located in the second air chamber. In normal fresh air mode, the outdoor air outlet is closed and the indoor air supply outlet is open. The portion of the humidifying element in the first air chamber is in a water-absorbing state or an intermediate state, and the portion in the second air chamber is in an intermediate state. After the outdoor fresh air enters the first air chamber through the outdoor air inlet, it is all sequentially passed through the second air chamber. The air flows into the room through the cavity and indoor air supply vents; in the humidifying fresh air mode, both the outdoor exhaust vent and the indoor air supply vent are open, the part of the humidifier located in the first air cavity is in a water absorption state and the part located in the second air cavity is in a water release state; after the outdoor fresh air enters the first air cavity through the outdoor air inlet, part of it flows to the outside through the outdoor exhaust vent, and the other part flows to the room through the second air cavity and the indoor air supply vent in sequence; it overcomes the shortcomings of existing fresh air devices that can only deliver ordinary fresh air or humidified fresh air, improves the flexibility of user use, and does not require continuous water supply.

[0028] Example 1 like Figures 1a to 5 As shown, this embodiment provides a fresh air device, including: The housing 1 has a first air chamber 151 and a second air chamber 152 inside. The housing wall of the housing 1 has an outdoor air inlet 111, an outdoor air outlet 131 and an indoor air supply outlet 121. The outdoor air inlet 111 and the outdoor air outlet 131 are both corresponding to the first air chamber 151 and are connected to the first air chamber 151 and the outside. The indoor air supply outlet 121 is corresponding to the second air chamber 152 and is connected to the second air chamber 152 and the inside. The first air chamber 151, the second air chamber 152 and the indoor air supply outlet 121 are connected in sequence. The humidifier 22 has a portion located in the first air chamber 151 and another portion located in the second air chamber 152. The humidifier 22 has a water absorption state that absorbs moisture from the flowing air, a water release state that releases moisture into the flowing air, and an intermediate state that neither absorbs nor releases moisture. The fresh air unit has a regular fresh air mode and a humidifying fresh air mode. Both the outdoor exhaust vent 131 and the indoor air supply vent 121 can be controlled to open and close. In the normal fresh air mode, the outdoor exhaust vent 131 is closed and the indoor air supply vent 121 is open. The portion of the humidifier 22 located in the first air cavity 151 is in a water-absorbing state or an intermediate state, and the portion of the humidifier 22 located in the second air cavity 152 is in an intermediate state. After the outdoor fresh air enters the first air cavity 151 through the outdoor air inlet 111, it flows into the room through the second air cavity 152 and the indoor air supply vent 121 in sequence, thereby delivering ordinary fresh air (unhumidified fresh air) into the room. In the humidified fresh air mode, both the outdoor exhaust vent 131 and the indoor air supply vent 121 are open. The portion of the humidifier 22 located in the first air chamber 151 is in a water-absorbing state, and the portion of the humidifier 22 located in the second air chamber 152 is in a water-releasing state. After the outdoor fresh air enters the first air chamber 151 through the outdoor air inlet 111, the moisture in it is absorbed. A portion of the fresh air flows to the outside through the outdoor exhaust vent 131, while another portion of the fresh air mixes with the released moisture when it enters the second air chamber 152, and then flows to the room through the indoor air supply vent 121, thereby delivering humidified fresh air to the room. In this way, the following technical effects can be achieved: (1) By controlling the opening and closing states of the outdoor exhaust vent and the indoor air supply vent, and coordinating the limiting of the water absorption state / water release state / intermediate state of the humidifier in different air chambers, the same device can selectively achieve "conventional fresh air mode" and "humidified fresh air mode"; specifically, in conventional fresh air mode, the outdoor exhaust vent is closed and the indoor air supply vent is open, the humidifier is in the water absorption state or intermediate state in the first air chamber and in the intermediate state in the second air chamber, and the outdoor fresh air flows through the first air chamber and the second air chamber in sequence before being directly sent into the room, realizing the delivery of unhumidified fresh air into the room; in humidified fresh air mode, both the outdoor exhaust vent and the indoor air supply vent are open. The humidifier absorbs water in the first air chamber and releases water in the second air chamber. Part of the fresh air is discharged outdoors, and the other part of the fresh air, carrying moisture, is sent into the room, thus delivering humidified fresh air into the room (outdoor fresh air enters the first air chamber, where the moisture is absorbed, part of the fresh air is discharged outdoors, and the other part of the fresh air mixes with the released moisture before being discharged into the room; therefore, the fresh air discharged into the room has a high moisture content). This overcomes the shortcomings of existing devices that can only deliver ordinary fresh air or humidified fresh air, allowing the device to flexibly adjust the fresh air mode according to the season, climate, and user comfort needs, thereby improving indoor environmental comfort and user freedom. (2) One part of the humidifier is located in the first air cavity and the other part is located in the second air cavity. It can be in water absorption state, water release state or intermediate state in different fresh air modes. In the humidifying fresh air mode, the part located in the first air cavity absorbs the moisture in the fresh air flowing through it, and the part located in the second air cavity releases the absorbed moisture into the fresh air, thereby achieving continuous humidification of the fresh air supplied to the room. This process does not require external water supply, water tank or manual water addition, avoiding the problem of bacterial and mold growth caused by water accumulation or long-term water retention in traditional wet film and spray humidification methods. It is suitable for long-term operation scenarios, which is conducive to maintaining the cleanliness and hygiene of indoor air, and is in line with the technical orientation of healthy building and low-carbon operation. (3) Only one outdoor air inlet is set up, and through the series / splitting flow path design of the first air cavity and the second air cavity, combined with the opening and closing control of the outdoor exhaust air outlet and the indoor air supply air outlet, dual-mode operation can be realized; this structure allows the first air cavity and the second air cavity to share the same fan, without the need to set up two independent air intake systems to achieve the switching between ordinary fresh air and humidified fresh air as in the prior art; thus, the number of components such as fans, air ducts and seals is greatly reduced, reducing material costs, assembly costs and subsequent maintenance costs, while simplifying the control logic and improving the economy and reliability of the whole machine; (4) The functions of fresh air introduction, airflow distribution and humidification are integrated into the same housing. The flow path design of the first air cavity and the second air cavity realizes the fusion of functions, eliminating the need to purchase separate fresh air equipment and humidification equipment. The integrated structure makes the equipment compact and occupies little space. At the same time, the water required for humidification comes directly from the outdoor fresh air (instead of an external water source), so users do not need to manually add water or maintain the water tank, which significantly reduces the operational burden. The humidification function and the fresh air function work together to actively regulate indoor humidity while introducing fresh air, which can effectively alleviate respiratory discomfort, dry skin and static electricity accumulation caused by dryness, thereby comprehensively improving indoor air quality and ease of use.

[0029] The following describes the conditions required for the humidifier 22 to be in three different states. The state of the humidifier 22 is related to the temperature of the air flowing through it: When the temperature of the air flowing through the humidifier 22 is less than or equal to the first preset temperature, the humidifier 22 is in a water-absorbing state; that is, when the temperature of the air flowing through the humidifier 22 is less than or equal to the first preset temperature, the humidifier 22 can absorb moisture from the air flowing through the humidifier 22. When the temperature of the air flowing through the humidifier 22 is greater than or equal to the second preset temperature, the humidifier 22 is in a water release state; that is, when the temperature of the air flowing through the humidifier 22 is greater than or equal to the second preset temperature, the humidifier 22 can release the absorbed water into the air flowing through the humidifier 22. When the temperature of the air flowing through the humidifier 22 is greater than the first preset temperature and less than the second preset temperature, or when the humidifier 22 reaches saturation, the humidifier 22 is in an intermediate state; that is, when the temperature of the air flowing through the humidifier 22 is greater than the first preset temperature and less than the second preset temperature, or when the humidifier 22 reaches saturation after absorbing moisture or reaches saturation after releasing moisture, the humidifier 22 neither absorbs nor releases moisture. The first preset temperature is lower than the second preset temperature.

[0030] The following describes the arrangement of the humidifier 22. The humidifier 22 can be controlled to move, so that different parts of it alternately enter the first air cavity 151 and the second air cavity 152. That is, the humidifier 22 is movably arranged between the first air cavity 151 and the second air cavity 152. When the humidifier 22 is controlled to move, the part of the humidifier 22 that is currently in the first air cavity 151 enters the second air cavity 152 at the next moment, and the part of the humidifier 22 that is currently in the second air cavity 152 enters the first air cavity 151 at the next moment.

[0031] Furthermore, the fresh air device also includes a heater 16; the heater 16 is disposed at the connection between the first air cavity 151 and the second air cavity 152, and is used to heat the fresh air entering the second air cavity 152 from the first air cavity 151. The humidifier 22 is configured to move in a ring around the heater 16, such that a part of the humidifier 22 is located in the first air cavity 151 and another part is located in the second air cavity 152. Preferably, heater 16 is an electric heater.

[0032] The following describes the structure required for outdoor fresh air to flow directly through the humidifier 22 after entering the first air cavity 151. A fan 3 is provided at the outdoor air inlet 111, and the fan 3 is located inside the first air cavity 151. The inlet 31 of the fan 3 is connected to the outdoor air inlet 111, and the outlet 32 ​​of the fan 3 is connected to the first air cavity 151. When the fan 3 is running, outdoor fresh air enters the first air cavity 151 through the outdoor air inlet 111. Inside the first air chamber 151, a guide plate 6 is provided between the outlet 32 ​​of the fan 3 and the humidifier 22 to guide the fresh air discharged from the fan 3 to the humidifier 22; that is, under the action of the guide plate 6, the fresh air discharged from the outlet 32 ​​of the fan 3 flows to the humidifier 22.

[0033] The following describes the status of the fan 3, heater 16 and humidifier 22 under two fresh air modes. In the normal fresh air mode, the fan 3 is in operation, the heater 16 is in a stopped state, and the humidifier 22 is in a stopped state. In the humidifying fresh air mode, both the fan 3 and the heater 16 are in operation, and the humidifying element 22 is in a circular motion.

[0034] Furthermore, a first valve 41 is provided at the outdoor exhaust vent 131 for opening and closing the outdoor exhaust vent 131 or adjusting the opening degree of the outdoor exhaust vent 131; a second valve 51 is provided at the indoor air supply vent 121 for opening and closing the indoor air supply vent 121 or adjusting the opening degree of the indoor air supply vent 121. In the normal fresh air mode, the flow rate of fresh air into the room can be adjusted by adjusting the speed of the fan 3 and / or the opening of the indoor air outlet 121; that is, the outdoor fresh air enters the first air cavity 151 through the outdoor air inlet 111, and then enters the room through the second air cavity 152 and the indoor air outlet 121; the flow rate of fresh air entering the room can be adjusted by adjusting the speed of the fan 3 and / or the opening of the indoor air outlet 121. In the humidifying fresh air mode, the flow rate of fresh air into the room can be adjusted by adjusting the speed of the fan 3 and / or the opening of the outdoor exhaust vent 131 and / or the opening of the indoor air supply vent 121; that is, outdoor fresh air enters the first air chamber 151 through the outdoor air inlet 111, part of the fresh air can be discharged to the outside through the outdoor exhaust vent 131, and the other part of the fresh air flows through the second air chamber 152 and the indoor air supply vent 121 in sequence and enters the room; the flow rate of fresh air into the room can be adjusted by adjusting the speed of the fan 3 and / or the opening of the outdoor exhaust vent 131 and / or the opening of the indoor air supply vent 121.

[0035] In this way, the following technical effects can be achieved: (1) By setting a first valve and a second valve at the outdoor exhaust outlet and the indoor air supply outlet respectively, and combining the fan speed adjustment, independent and coordinated control of the fresh air flow direction and flow rate under the two working modes is realized; in the normal fresh air mode, only the fan speed or the opening of the second valve needs to be adjusted to change the indoor air supply volume, and the control method is simple and efficient; in the humidifying fresh air mode, the fan speed, the opening of the first valve and the opening of the second valve can be adjusted at the same time, so as to ensure the exhaust ratio required for humidification and accurately set the final fresh air flow rate entering the room, avoiding insufficient air supply or excessive humidification due to excessive exhaust; (2) By adjusting the combination of valve opening and fan speed, users can flexibly select the air supply volume according to the indoor and outdoor environment (such as temperature and humidity, number of people and air quality) to avoid unnecessary energy consumption; especially in the humidification fresh air mode, by controlling the exhaust volume through the first valve, the air flow rate of the humidification element flowing through the first air chamber can be adjusted, thereby affecting the water absorption efficiency of the humidification element, making the humidification process more controllable, preventing over-humidification or under-humidification, and improving indoor comfort; (3) This scheme only adds two valve components, without the need for complex branch ducts or additional fans, and can realize flow distribution and regulation in two modes, which is conducive to maintaining the miniaturization and low cost of the device; at the same time, the various regulation variables (fan speed, valve opening) are physically independent and control decoupled, which facilitates automatic control or manual adjustment and reduces the design difficulty of the control system. (4) Because it can independently adjust the exhaust volume and supply volume, the fresh air device is not only suitable for conventional ventilation and humidification ventilation, but also compatible with advanced functions such as fresh air circulation and humidity balance during the transition season, which improves the market adaptability and technical added value of the product.

[0036] The following describes the structure required for the humidifier 22 to make a circular motion. The fresh air device also includes a conveyor belt 21, which is arranged around the outer periphery of the heater 16. A portion of the conveyor belt 21 is located in the first air chamber 151 and another portion is located in the second air chamber 152. The conveyor belt 21 can be controlled to move in a circular motion. The humidifier 22 is mounted on the conveyor belt 21 and can move in a circular motion with the conveyor belt 21; that is, as the conveyor belt 21 moves in a circular motion, the humidifier 22 absorbs moisture from the fresh air in the first air chamber 151 and releases moisture in the second air chamber 152, thus realizing the continuity of the process of absorbing and releasing moisture.

[0037] In this way, the following technical effects can be achieved: (1) The humidifier 22 is set on the conveyor belt 21 that can circulate and uses the outdoor fresh air flowing through the first air cavity 151 as the source of water. The part of the humidifier 22 in the first air cavity 151 absorbs the water in the fresh air and then moves to the second air cavity 152. The part of the humidifier 22 in the second air cavity 152 releases the absorbed water under the action of the hot fresh air heated by the heater 16, and humidifies the hot fresh air. It realizes the self-circulation of "taking water from the fresh air and then using it to humidify the fresh air" (the low temperature fresh air is absorbed by the humidifier in the first air cavity, and the humidifier moves to the second air cavity and is dehydrated by the high temperature fresh air and sent into the room with the fresh air. The water completes the process of "outdoor fresh air → humidifier → indoor air supply"). It does not require an external water source or manual water filling of the water tank, which fundamentally eliminates the maintenance burden of users regularly adding water. (2) Traditional humidification methods (such as wet film humidification, ultrasonic humidification, and electric heating humidification) all involve static water storage or long-term moist components, which are prone to the growth of bacteria and mold and produce odors. In this embodiment, different parts of the humidifying component 22 are alternately located in the first air cavity 151 and the second air cavity 152, so that the surface of the humidifying component 22 is in a state of periodic regeneration for a long time, realizing the continuous process of absorbing and releasing water. At the same time, the absence of a water tank also avoids the problem of water accumulation and deterioration, thereby significantly reducing the risk of bacterial and mold growth and ensuring that the fresh air delivered to the room is clean and hygienic. (3) The conveyor belt 21 can be controlled to circulate, driving the humidifier 22 to move in a ring between the first air chamber 151 and the second air chamber 152; by adjusting the speed of the conveyor belt 21 (e.g., intermittent or continuous rotation), the time ratio of the humidifier 22 to absorb and release water can be controlled, thereby adjusting the humidification amount per unit time to meet the needs of different indoor humidity; compared with fixed humidification materials, this embodiment achieves a dynamic balance between water absorption and release, avoids the problem of failure after the humidification material is saturated, and can provide a stable humidification effect for a long time. (4) The heater 16, conveyor belt 21 and humidifier 22 are all integrated between the first air chamber 151 and the second air chamber 152 inside the housing 1, without the need for additional independent water tank, water pump or external regeneration device; the structure is compact, which is conducive to the miniaturization and thinning of the whole machine, reducing the area occupied in the user's room, improving installation flexibility and user acceptance.

[0038] Furthermore, the fresh air unit also includes a transmission mechanism, which includes a ring rack 23 and multiple gears 24; The annular rack 23 is disposed on the inner side of the conveyor belt 21, and multiple gears 24 are disposed on the inner side of the annular rack 23. A portion of the gears 24 are rotatably and spaced apart within the first air chamber 151, while another portion of the gears 24 are rotatably and spaced apart within the second air chamber 152; each gear 24 meshes with a ring rack 23. When one of the multiple gears 24 is controlled to rotate, the ring rack 23 can carry the conveyor belt 21 in a cyclical motion.

[0039] Specifically, the circumferential axis of the conveyor belt 21 is parallel to the height direction of the housing 1; There are two transmission mechanisms, which are respectively located at both ends of the height direction of the housing 1; along the height direction of the housing 1, two gears 24 located in the two transmission mechanisms and positioned opposite each other are connected by a rotating shaft 25. When any one of the multiple shafts 25 or any one of the multiple gears 24 is controlled to rotate, the remaining shafts 25 and the remaining gears 24 rotate, and the ring rack 23 and the driven gear 24 can carry the conveyor belt 21 in a cyclical motion.

[0040] In this way, the following technical effects can be achieved: (1) By setting two transmission mechanisms, located at both ends of the height direction of the housing 1 respectively, and fixing two opposing gears 24 (one located at the upper transmission mechanism and the other at the lower transmission mechanism) through a rotating shaft 25, the gears 24 at the upper and lower ends can rotate synchronously; when one of the gears 24 is driven, the rotating shaft 25 drives the corresponding gear 24 at the other end to rotate synchronously, thereby ensuring that the ring rack 23 is subjected to uniform driving force at both ends; effectively avoiding the problems of conveyor belt 21 skew, jamming or vibration caused by unilateral drive, and significantly improving the smoothness and reliability of the cyclic movement of the conveyor belt 21; (2) The two transmission mechanisms share the driving torque required for the cyclic movement of the conveyor belt 21. Compared with only one transmission mechanism on one side, this embodiment transmits power to the gears 24 at both ends simultaneously through the rotating shaft 25, which makes the meshing points of the ring rack 23 and the gears 24 more and the force more dispersed, reducing the wear of individual gears 24 and ring rack 23; at the same time, the conveyor belt 21 is less prone to local tensile deformation during movement, which is conducive to extending the overall service life of the conveyor belt 21 and the humidifying component 22. (3) The axis of the conveyor belt 21 is parallel to the height of the housing 1, which means that the conveyor belt 21 and the shaft 25 of its transmission mechanism are arranged in the vertical direction, and the conveyor belt 21 moves in a circular motion in the horizontal plane. This layout makes full use of the height space of the housing 1 and reduces the size requirements in the horizontal direction. It is conducive to designing the fresh air device as a wall-mounted or thin floor-standing type, reducing the occupation of the horizontal area of ​​the room. At the same time, the two transmission mechanisms are located at the upper and lower ends, making the internal structure of the housing 1 symmetrical and the force balanced, which is convenient for compact integration with other air duct components (such as heater 16 and air cavity partition 14). (4) In scenarios where a wider conveyor belt 21 is required (to increase the number or area of ​​humidifying components 22), single-sided driving is prone to generating torsional torque, causing asynchronous movement on both sides of the conveyor belt 21. In this embodiment, the transmission mechanism at both ends and the rotating shaft 25 are connected to make the driving force evenly distributed along the height direction of the housing 1, thereby improving the torsional stiffness of the transmission system. Even if the width of the conveyor belt 21 is large, it can ensure that all parts of it move synchronously, avoiding the phenomenon of "deviation" or "creeping".

[0041] The following describes the arrangement of the heater 16. The interior of the housing 1 is provided with a partition 14, which divides the interior of the housing 1 into a first air chamber 151 and a second air chamber 152. The partition 14 is provided with an opening 141, which connects the first air chamber 151 and the second air chamber 152. The heater 16 is located at the opening 141 and on the side close to the second air chamber 152.

[0042] In this way, the following technical effects can be achieved: (1) By setting a heater at the opening of the partition and placing it on one side of the second air cavity, the fresh air flowing from the first air cavity to the second air cavity must be concentrated through the heater and heated by the heater. The heat is concentrated on the air entering the second air cavity, avoiding the heat dissipation of the heater to the first air cavity or other areas of the casing, thereby significantly improving heating efficiency and reducing energy consumption. (2) Part of the humidifier is located in the first air cavity and the other part is located in the second air cavity. Since the heater is close to the second air cavity, the air temperature in the first air cavity is less affected by the heater and can maintain a low temperature (≤ first preset temperature), which is conducive to the humidifier effectively absorbing moisture in the air in the first air cavity. The heater is located on one side of the second air chamber, which ensures that the air entering the second air chamber is rapidly heated to a higher temperature (≥ the second preset temperature), so that the part of the humidifier located in the second air chamber is in a water-releasing state, thereby releasing moisture into the flowing air and achieving effective humidified fresh air output; this layout ensures the high efficiency and stability of the humidification process.

[0043] (3) The opening of the partition is used as the installation position of the heater, which eliminates the need for additional brackets or complex air ducts, reducing the number of components and space occupied. At the same time, the heater is close to the second air chamber, which facilitates the coordination with the annular movement path of the humidifying component (such as arranging it around the heater), which is conducive to the alternating entry of different parts of the humidifying component into the first air chamber and the second air chamber, realizing continuous water absorption and water release cycle.

[0044] The structure and materials of the humidifier 22 are described below. The humidifier 22 has a porous structure and is made of at least one of zeolite, metal-organic framework materials and activated carbon. Specifically, the humidifying element 22 is layered and covers the conveyor belt 21.

[0045] In this way, the following technical effects can be achieved: (1) The porous structure provides abundant micropores and mesopores, which significantly increases the contact area between the humidifier and the air. In the conventional fresh air mode, the part of the humidifier located in the first air cavity can quickly absorb the moisture in the air flowing through it. In the humidified fresh air mode, the part located in the second air cavity can quickly release the moisture, thereby improving the humidification response speed and the overall humidification efficiency. (2) Zeolite, metal-organic framework materials and activated carbon are all typical porous adsorption materials. Their moisture absorption capacity changes significantly with temperature: they have strong water absorption capacity at low temperature (suitable for the water absorption state of the first air chamber) and are easy to dehydrate at high temperature (suitable for the water release state of the second air chamber). This is highly consistent with the principle of controlling the state of the humidifier based on air temperature in this device. No additional energy is required to drive material regeneration, which is energy-saving and reliable. (3) The material of the humidifier 22 is resistant to acid and alkali and oxidation. It is not easy to decompose or pulverize under long-term airflow scouring and alternating wet and dry environment. It can maintain the stability of the porous structure, extend the service life of the humidifier, and reduce the frequency of maintenance and replacement. (4) Unlike traditional direct water spraying or water tray humidification methods, this humidifier achieves humidification by adsorbing gaseous water or tiny water droplets in the air. It does not require water storage, will not breed bacteria or produce white powder, and delivers cleaner air, meeting indoor air quality requirements.

[0046] The structure of housing 1 will be described below. The housing wall of housing 1 includes a first housing wall 11, a second housing wall 12 and a third housing wall 13. The first housing wall 11 and the second housing wall 12 are arranged opposite to each other in the length direction of housing 1, and the third housing wall 13 connects the first housing wall 11 and the second housing wall 12. The first shell wall 11 is provided with an outdoor air inlet 111, the second shell wall 12 is provided with an indoor air outlet 121, and the third shell wall 13 is provided with an outdoor air outlet 131.

[0047] In this way, the following technical effects can be achieved: (1) The outdoor air inlet and the indoor air outlet are respectively set on the opposite first shell wall and the second shell wall, and the two are farthest apart, which effectively prevents the fresh air introduced from the outside from being discharged directly through a short path without being fully treated or humidified; at the same time, the outdoor exhaust outlet is set on the third shell wall on the side, forming a spatial misalignment with the outdoor air inlet and the indoor air outlet, further reducing the risk of mutual interference between air intake and exhaust, and ensuring that most of the outdoor fresh air flows into the room along the predetermined path; (2) The outdoor air inlet and the indoor air outlet are arranged opposite to each other, so that the fresh air flows in a roughly straight line in the casing (from the first shell wall to the second shell wall). When it flows through the humidifier, it is evenly distributed, avoiding the airflow resistance loss caused by bending or backflow, which helps to reduce the energy consumption of the fan and increase the air volume per unit energy consumption. (3) The three air outlets are distributed on three different shell walls, so that the inside of the shell can be naturally divided into the first air cavity (near the outdoor air inlet and the outdoor air outlet) and the second air cavity (near the indoor air outlet), without the need for a complex internal air duct; this layout is conducive to the installation method in which part of the humidifier is located in the first air cavity and the other part is located in the second air cavity, which facilitates the realization of ring movement or zoning function.

[0048] Furthermore, the first valve 41 is slidably disposed on the third shell wall 13 and located in the first air cavity 151. The sliding direction of the first valve 41 is parallel to the length direction of the first valve 41 and also parallel to the length direction of the third shell wall 13. By controlling the sliding of the first valve 41, the outdoor exhaust port 131 can be opened or closed or the opening degree of the outdoor exhaust port 131 can be adjusted. The second valve 51 is slidably disposed on the second shell wall 12 and located in the second air cavity 152. The sliding direction of the second valve 51 is parallel to the length direction of the second valve 51 and also parallel to the length direction of the second shell wall 12. By controlling the sliding of the second valve 51, the indoor air outlet 121 can be opened or closed or the opening degree of the indoor air outlet 121 can be adjusted.

[0049] Specifically, the first valve 41 is slidably mounted via a first screw and nut mechanism, which includes a first screw 42 and a first nut 43. The first screw 42 is rotatably mounted on the third housing wall 13 and is drivenly connected to the first drive motor 44. The first nut 43 is mounted on the first valve 41 and is drivenly connected to the first screw 42. When the first drive motor 44 drives the first screw 42 to rotate, the first nut 43 drives the first valve 41 to slide, thereby opening or closing the outdoor exhaust vent 131, or adjusting the opening degree of the outdoor exhaust vent 131. The second valve 51 is slidably mounted via a second lead screw and nut mechanism, which includes a second lead screw 52 and a second nut 53. The second lead screw 52 is rotatably mounted on the second housing wall 12 and is drivenly connected to the second drive motor 54. The second nut 53 is mounted on the second valve 51 and is drivenly connected to the second lead screw 52. When the second drive motor 54 drives the second lead screw 52 to rotate, the second nut 53 drives the second valve 51 to slide, thereby opening or closing the indoor air outlet 121, or adjusting the opening degree of the indoor air outlet 121.

[0050] This embodiment also provides a fresh air air conditioner, including an indoor unit, an outdoor unit body and any of the above-mentioned fresh air devices; the indoor unit is installed indoors, the outdoor unit body and the fresh air devices are both installed outdoors, and the indoor air outlet 121 is connected to the indoor unit through a fresh air duct. The fresh air system is installed outdoors, which reduces noise, is not limited by space, and is more flexible in installation, solving the problems of high noise and limited installation space when the fresh air system is installed indoors.

[0051] Example 2 Based on Embodiment 1, this embodiment proposes that the position of the partition 14 in the length direction of the housing 1 is adjustable. By adjusting the position of the partition 14 in the length direction of the housing 1, the volume of the first air chamber 151 and the second air chamber 152 can be adjusted.

[0052] In this way, the following technical effects can be achieved: (1) In the dry and cold winter in the north, the absolute humidity of the outdoor air is low and the demand for humidification is high. At this time, the partition 14 can be moved towards the first air cavity 151 to increase the volume of the second air cavity 152, so that the fresh air stays in the second air cavity 152 for a longer time and fully contacts the part of the humidifying element 22 in the second air cavity 152, thereby increasing the humidification capacity. In the humid or rainy season, the demand for humidification is low. The partition 14 can be moved towards the second air cavity 152 to reduce the volume of the second air cavity 152, shorten the humidification flow path, and avoid over-humidification. Users or control systems can flexibly adjust the air cavity volume according to the real-time environmental requirements so that one device can adapt to multiple working conditions. (2) The size of the first air chamber 151 affects the effect of the humidifier 22 in absorbing moisture in the first air chamber 151, and the size of the second air chamber 152 affects the effect of the humidifier 22 in releasing moisture in the second air chamber 152. By adjusting the position of the baffle 14, the resistance characteristics and airflow distribution ratio of the two air chambers can be changed. For example, when the user needs a large fresh air volume but only needs slight humidification, the baffle 14 can be adjusted to make the first air chamber 151 larger and the second air chamber 152 smaller. After the fresh air enters the second air chamber 152 and is humidified, it is sent out from the indoor air outlet 121, shortening the flow time of the fresh air in the second air chamber 152. When the user has higher humidification requirements and can accept a slight reduction in the total fresh air volume, the adjustment is reversed. This dynamic balancing ability significantly improves the applicability and flexibility of the device. (3) The water absorption (in the first air chamber 151) and water release (in the second air chamber 152) of the humidifier 22 need to be matched with appropriate airflow speed and residence time. If the volume of the first air chamber 151 is too small, the flow rate of fresh air in the first air chamber 151 is too fast, and the humidifier 22 does not absorb enough water. If the volume of the second air chamber 152 is too small, the residence time of hot fresh air in the second air chamber 152 is insufficient, and the water release of the humidifier 22 is incomplete. By adjusting the position of the baffle 14, the volume of the two air chambers can be adjusted respectively, so that the airflow speed matches the water absorption / release dynamics of the humidifier 22, thereby improving the net humidification efficiency of each cycle. Under the same humidification demand, the power of the heater 16 or the speed of the conveyor belt 21 can be reduced to achieve energy-saving operation. (4) When equipped with a humidity sensor, an air volume sensor and a baffle adjustment mechanism, the control system can automatically calculate the optimal air cavity volume ratio based on the difference between indoor and outdoor humidity and the user-set target, and drive the baffle 14 to move to the corresponding position; for example, when the indoor humidity is detected to be much lower than the set value, the system automatically increases the volume of the second air cavity 152 to enhance humidification; when the indoor humidity is detected to be close to the set value, the volume of the second air cavity 152 is reduced to maintain balance; this intelligent adjustment capability further enhances the automation level and energy-saving potential of the device.

[0053] Example 3 Based on Embodiment 1 or 2, this embodiment proposes that the power of heater 16 is adjustable; In the humidifying fresh air mode, the flow rate and humidity of fresh air flowing into the room can be adjusted by coordinating the power of the heater 16, the wind speed of the fan 3, the opening of the outdoor exhaust vent 131, and the opening of the indoor air supply vent 121.

[0054] In this way, the following technical effects can be achieved: (1) Through the coordinated adjustment of four independent variables: the fan speed controls the total circulating air volume; the outdoor exhaust vent opening controls the proportion of air volume flowing through the first air chamber (water absorption side), thereby adjusting the water absorption rate of the humidifier; the indoor air supply vent opening controls the final fresh air flow rate into the room; the heater power controls the temperature of the second air chamber (water release side), thereby precisely controlling the water release rate of the humidifier. By coordinating the four elements, the target humidity can be maintained independently when the air supply volume changes, or the air supply volume can be stabilized when the humidity changes, significantly improving the degree of control freedom. (2) Low humidity requirements (such as summer moisture prevention): reduce the power of the heater or increase the exhaust opening to reduce water release; For high humidity requirements (such as dry winter): increase the power of the heater and appropriately reduce the exhaust fan opening to enhance humidification; The coordinated adjustment enables the device to operate stably within a wide humidity range, adapting to different climate zones and indoor humidity requirements; (3) By adjusting the opening of the outdoor exhaust vent, energy waste caused by excessive fresh air being heated and directly discharged can be avoided. For example, when moderate humidity is required, the exhaust vent opening can be appropriately reduced to allow more heated air to be sent into the room instead of being discharged to the outside, thereby improving the effective utilization rate of the heater's heat. At the same time, the fan speed and valve opening can be coordinated to allow the fan to work in the high-efficiency zone and reduce the overall energy consumption. (4) All four adjustable variables can respond in real time and can perform closed-loop control based on the feedback from the indoor humidity sensor. For example, when the indoor humidity is too low, the heater power can be increased and the exhaust opening can be reduced simultaneously to quickly increase the supply air humidity. The same applies to the opposite. Coordinated adjustment avoids the lag or overshoot phenomenon of single variable adjustment and improves comfort. (5) Since the humidification amount can be adjusted by the power of the heater and the airflow distribution, there is no need to frequently change the speed of the humidifier's circular motion (if a motion mechanism is provided), thereby reducing mechanical wear and improving the service life of the humidifier and transmission system; at the same time, it can also be used as a supplementary means of humidifier motion control to increase system redundancy.

[0055] Example 4 Based on Embodiment 1 or 2, this embodiment proposes that the conveying speed of the conveyor belt 21 is adjustable; In the humidifying fresh air mode, the flow rate and humidity of fresh air flowing into the room can be adjusted by coordinating the conveying speed of the conveyor belt 21, the wind speed of the fan 3, the opening of the outdoor exhaust vent 131 and the opening of the indoor air supply vent 121.

[0056] In this way, the following technical effects can be achieved: (1) The speed of the conveyor belt determines the exchange frequency of the humidifier between the first and second air chambers; the faster the speed, the more times the humidifier absorbs and releases water per unit time, and the greater the total water release; through coordinated regulation: the fan speed and valve opening control the air volume and proportion flowing through each air chamber; the conveyor belt speed controls the renewal rate of the humidifier. The decoupling of the two means that even with a fixed air volume, the humidification can be increased by speeding up the conveyor belt and decreased by speeding down the conveyor belt. This allows for humidity adjustment independently of the air volume, significantly improving control precision. (2) In low humidity demand scenarios, the speed of the conveyor belt can be reduced, so that the humidifier stays in the first air chamber for a longer time and reduces the frequency of entering the second air chamber. Even if the heater and air volume remain unchanged, the output can be lower humidity. In high humidity demand scenarios, the speed of the conveyor belt can be increased, so that the humidifier circulates quickly and the humidification is enhanced. Combined with the adjustment of the fan and valve, it can work stably in a wide humidity range and adapt to different seasons and indoor load changes. (3) When moderate humidity is required, the amount of water released can be increased by appropriately increasing the speed of the conveyor belt without significantly increasing the power of the heater (increasing the power of the heater will result in additional energy consumption); conversely, if the speed of the conveyor belt is limited, a higher heating temperature is required to desorb the same amount of moisture, resulting in higher energy consumption; therefore, increasing the speed of the conveyor belt can optimize energy distribution and reduce the overall power consumption of the machine. (4) If the speed of the conveyor belt is too slow, the humidifier in the first air chamber may reach water saturation and be unable to continue to absorb water, resulting in a decrease in subsequent humidification capacity. By adjusting the speed of the conveyor belt, the conveying speed can be increased when saturation is detected, and the saturated part can be quickly sent into the second air chamber for water release and regeneration, thereby keeping the humidifier in a high-efficiency water absorption-water release cycle and avoiding performance degradation.

[0057] Example 5 Based on Embodiment 1 or 2, this embodiment proposes that the power of the heater 16 and the conveying speed of the conveyor belt 21 can both be adjusted; In the humidifying fresh air mode, the flow rate and humidity of fresh air flowing into the room can be adjusted by coordinating the power of the heater 16, the conveying speed of the conveyor belt 21, the wind speed of the fan 3, the opening of the outdoor exhaust vent 131 and the opening of the indoor air supply vent 121.

[0058] In this way, the following technical effects can be achieved: (1) Among the five regulating variables: Fan speed + indoor air supply vent opening / outdoor air exhaust vent opening → controls total air volume and the proportion entering the room; The power of the heater + the speed of the conveyor belt → controls the water release rate of the humidifier (the amount of water desorbed per unit time); The two are independent of each other, and theoretically, any target humidity can be achieved under any air volume (within the device's capacity), completely avoiding the coupling problem of humidity decrease caused by increased air volume in traditional humidification, and achieving true constant humidity variable air volume or constant air volume variable humidity control. (2) Requires extremely low humidity (almost no humidification): The power of the heater can be reduced, the speed of the conveyor belt can be reduced, and the exhaust opening can be increased so that the humidifying element releases almost no water; For applications requiring extremely high humidity: increase the power of the heater, increase the speed of the conveyor belt, and reduce the exhaust fan opening to enable the humidifier to release water quickly and efficiently. The device can be adjusted in combination with five parameters to output both dry air close to the original outdoor humidity and high-humidity air close to saturation, meeting the diverse needs from dry winter to humid transition season. (3) For the same target humidity, there are multiple parameter combinations (e.g., high heating + low conveying speed and low heating + high conveying speed can both achieve the same water release); through collaborative optimization, the combination with the lowest energy consumption can be selected: Prioritizing increasing the speed of the conveyor belt (which consumes very little motor power) rather than increasing the power of the heater (which consumes a lot of electric heat) can significantly reduce overall energy consumption. At the same time, adjust the exhaust fan opening to avoid unnecessary heat loss with the exhaust fan; This maximizes energy efficiency and aligns with the trend of green energy conservation; (4) The power adjustment of the heater has thermal inertia (heating / cooling takes time), while the speed of the conveyor belt can be changed instantaneously; when it is necessary to quickly increase the humidification, the speed of the conveyor belt can be increased rapidly first (immediately increasing the renewal frequency of the humidification components on the water release side), and then the power of the heater can be gradually increased; when it is necessary to quickly reduce the humidification, the speed of the conveyor belt can be reduced first and the power of the heater can be reduced; this “fast and slow combination” coordinated strategy significantly shortens the response time of humidity adjustment and improves comfort; (5) Through coordinated control, the balance between the water absorption saturation of the humidifier in the first air chamber and the regeneration degree of the second air chamber can be precisely maintained; the long-term saturation failure of the humidifier due to low heating power or slow conveyor belt is avoided, as well as the excessive drying and embrittlement of the humidifier due to high heating power or fast conveyor belt is avoided, thereby extending the service life of the humidifier and transmission system.

[0059] Exemplary embodiments of this disclosure have been specifically shown and described above. It should be understood that this disclosure is not limited to the detailed structures, arrangements, or implementations described herein; rather, this disclosure is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended claims.

Claims

1. A fresh air device, characterized in that, include: The casing (1) has a first air chamber (151) and a second air chamber (152) inside. The casing wall of the casing (1) has an outdoor air inlet (111), an outdoor air outlet (131) and an indoor air supply outlet (121). The outdoor air inlet (111) and the outdoor air outlet (131) are both connected to the first air chamber (151). The first air chamber (151), the second air chamber (152) and the indoor air supply outlet (121) are connected in sequence. The humidifier (22) has a portion located in the first air chamber (151) and another portion located in the second air chamber (152); the humidifier (22) has a water absorption state that absorbs moisture from the flowing air, a water release state that releases moisture into the flowing air, and an intermediate state that neither absorbs nor releases moisture. The fresh air device has a regular fresh air mode and a humidifying fresh air mode, and both the outdoor exhaust vent (131) and the indoor air supply vent (121) can be controlled to open and close. In the normal fresh air mode, the outdoor exhaust vent (131) is closed and the indoor air supply vent (121) is open. The portion of the humidifier (22) located in the first air cavity (151) is in a water-absorbing state or an intermediate state, and the portion located in the second air cavity (152) is in an intermediate state. After the outdoor fresh air enters the first air cavity (151) through the outdoor air inlet (111), it flows into the room sequentially through the second air cavity (152) and the indoor air supply vent (121). In the humidified fresh air mode, both the outdoor exhaust vent (131) and the indoor air supply vent (121) are open. The portion of the humidifier (22) located in the first air cavity (151) is in a water absorption state, and the portion located in the second air cavity (152) is in a water release state. After the outdoor fresh air enters the first air cavity (151) through the outdoor air inlet (111), a portion flows to the outside through the outdoor exhaust vent (131), and the other portion flows to the inside through the second air cavity (152) and the indoor air supply vent (121) in sequence.

2. The fresh air device according to claim 1, characterized in that, The state of the humidifying element (22) is related to the temperature of the air flowing through it: When the temperature of the air flowing through the humidifier (22) is less than or equal to the first preset temperature, the humidifier (22) is in the water absorption state; When the temperature of the air flowing through the humidifier (22) is greater than or equal to the second preset temperature, the humidifier (22) is in the water release state; When the temperature of the air flowing through the humidifier (22) is greater than the first preset temperature and less than the second preset temperature, or when the humidifier (22) reaches saturation, the humidifier (22) is in the intermediate state; Wherein, the first preset temperature is less than the second preset temperature.

3. The fresh air device according to claim 2, characterized in that, The humidifier (22) can be controlled to move so that different parts of it alternately enter the first air chamber (151) and the second air chamber (152).

4. The fresh air device according to claim 3, characterized in that, It also includes a heater (16); the heater (16) is disposed at the connection between the first air cavity (151) and the second air cavity (152) and is used to heat the fresh air entering the second air cavity (152) from the first air cavity (151); The humidifier (22) is configured to move in a ring around the heater (16), such that a part of the humidifier (22) is located in the first air cavity (151) and another part is located in the second air cavity (152).

5. The fresh air device according to claim 4, characterized in that, A fan (3) is provided at the outdoor air inlet (111), and the fan (3) is located in the first air cavity (151); the inlet (31) of the fan (3) is connected to the outdoor air inlet (111), and the outlet (32) of the fan (3) is connected to the first air cavity (151); Inside the first air chamber (151), a guide plate (6) is provided between the outlet (32) of the fan (3) and the humidifier (22) to guide the fresh air discharged by the fan (3) to the humidifier (22).

6. The fresh air device according to claim 5, characterized in that, In the normal fresh air mode, the fan (3) is in operation, the heater (16) is in a stopped operation state, and the humidifier (22) is in a stopped movement state; In the humidified fresh air mode, both the fan (3) and the heater (16) are in operation, and the humidifying element (22) is in a circular motion state.

7. The fresh air device according to claim 6, characterized in that, The outdoor exhaust vent (131) is provided with a first valve (41) for opening and closing the outdoor exhaust vent (131) or adjusting the opening degree of the outdoor exhaust vent (131); the indoor air supply vent (121) is provided with a second valve (51) for opening and closing the indoor air supply vent (121) or adjusting the opening degree of the indoor air supply vent (121). In the conventional fresh air mode, the flow rate of fresh air to the room can be adjusted by adjusting the speed of the fan (3) and / or the opening of the indoor air outlet (121); In the humidified fresh air mode, the flow rate of fresh air to the room can be adjusted by adjusting the speed of the fan (3) and / or the opening of the outdoor exhaust vent (131) and / or the opening of the indoor air supply vent (121).

8. The fresh air device according to claim 4, characterized in that, It also includes a conveyor belt (21) which is arranged around the outer periphery of the heater (16), and a portion of the conveyor belt (21) is located in the first air cavity (151) and another portion is located in the second air cavity (152); the conveyor belt (21) can be controlled to circulate. The humidifying component (22) is disposed on the conveyor belt (21) and can move in a ring along the conveyor belt (21).

9. The fresh air device according to claim 8, characterized in that, It also includes a transmission mechanism, which comprises an annular rack (23) and a plurality of gears (24); The annular rack (23) is disposed on the inner side of the conveyor belt (21), and a plurality of gears (24) are disposed on the inner side of the annular rack (23); A portion of the gears (24) are rotatably and spaced apart in the first air chamber (151), and another portion of the gears (24) are rotatably and spaced apart in the second air chamber (152); each gear (24) meshes with an annular rack (23); When one of the plurality of gears (24) is controlled to rotate, the annular rack (23) can carry the conveyor belt (21) in a cyclical motion.

10. The fresh air device according to claim 8, characterized in that, The circumferential axis of the conveyor belt (21) is parallel to the height direction of the housing (1); The transmission mechanism is provided in two parts, and the two transmission mechanisms are respectively located at both ends of the height direction of the housing (1); along the height direction of the housing (1), the two gears (24) located in the two transmission mechanisms and positioned opposite each other are connected by a rotating shaft (25).

11. The fresh air device according to claim 4, characterized in that, The housing (1) is provided with a partition (14) inside, which divides the interior of the housing (1) into a first air chamber (151) and a second air chamber (152); the partition (14) is provided with an opening (141) which connects the first air chamber (151) and the second air chamber (152). The heater (16) is located at the opening (141) and on the side close to the second air chamber (152).

12. The fresh air device according to claim 1, characterized in that, The humidifying element (22) has a porous structure and is made of at least one of zeolite, metal-organic framework material and activated carbon.

13. The fresh air device according to claim 1, characterized in that, The housing (1) has a first housing wall (11), a second housing wall (12) and a third housing wall (13). The first housing wall (11) and the second housing wall (12) are arranged opposite to each other in the length direction of the housing (1), and the third housing wall (13) connects the first housing wall (11) and the second housing wall (12). The first shell wall (11) is provided with the outdoor air inlet (111), the second shell wall (12) is provided with the indoor air outlet (121), and the third shell wall (13) is provided with the outdoor air outlet (131).

14. A fresh air conditioning system, characterized in that, It includes an indoor unit, an outdoor unit body, and a fresh air device as described in any one of claims 1 to 13; the indoor unit is installed indoors, the outdoor unit body and the fresh air device are both installed outdoors, and the indoor air outlet (121) is connected to the indoor unit via a fresh air duct.

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