Fresh air device

Abstract

The application discloses a fresh air device, comprising: an outer shell, an outdoor air inlet, an outdoor air outlet, an indoor air outlet and an indoor return air outlet are formed on the outer shell, a first heat exchange cavity and a second heat exchange cavity are formed in the outer shell; a heat exchange assembly, comprising a first heat exchanger and a second heat exchanger; a reversing device, which is respectively communicated with the first heat exchange cavity and the second heat exchange cavity; a control module, which is configured to control the communication state of the reversing device, control the opening degree of the heat exchange cavity and the communication port connected by the fresh air channel and the exhaust air channel, and control the refrigerant flow direction, so that the fresh air channel and the exhaust air channel are matched with the operation mode, and the suction accessories are arranged in the first heat exchange cavity and the second heat exchange cavity, which are used for adsorbing or releasing moisture. The scheme has the advantages of simple structure, low manufacturing cost, simple control logic and convenient realization.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning technology, specifically, it relates to a fresh air device. Background Technology

[0002] As people's living standards improve, they are paying more and more attention to the quality of their indoor environment. Indoor humidity is also being used as a standard for judging the comfort of the indoor environment. Air quality and comfort are increasingly valued by every family and various commercial and office spaces.

[0003] Excessive or insufficient humidity can disrupt the comfort of the indoor environment. In summer, the heat-to-humidity ratio of air conditioning units can only vary within a certain range, making it difficult to adapt to changes in the indoor heat-to-humidity ratio. In winter, air conditioning heating can lead to dry indoor air, and prolonged air conditioning operation can cause rapid evaporation of moisture from the human body, which in severe cases can reduce immunity, cause dizziness, and chest tightness. Therefore, it is very important for air conditioners to be able to regulate temperature and humidity.

[0004] The common dehumidification method is condensation dehumidification, which requires the cold water temperature to be lower than the dew point temperature of the air. This inevitably leads to a decrease in temperature, which cannot simultaneously achieve comfort. In order to improve the temperature of the degraded air, it is even necessary to reheat the air, which results in further waste of energy.

[0005] In addition, the humidification process requires an additional humidification water supply pipeline. The water supply requires water supply pipelines and control valves, etc., which are complex structures. This makes the pipeline layout more complicated, which is not conducive to installation and maintenance, and there is a risk of water leakage. Summary of the Invention

[0006] The purpose of this invention is to provide a fresh air device to solve the problems of complex water supply pipes and control valves in existing indoor humidity control devices, which are not conducive to disassembly and assembly, and the need for continuous cooling and heating operations in traditional dehumidification methods, resulting in energy waste.

[0007] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0008] A fresh air device, characterized in that it comprises:

[0009] An outer shell has an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet, and an indoor air return outlet formed thereon. A first heat exchange chamber and a second heat exchange chamber are formed inside the outer shell.

[0010] The heat exchange assembly includes a first heat exchanger disposed in the first heat exchange chamber and a second heat exchanger disposed in the second heat exchange chamber;

[0011] A reversing device, which is connected to the first heat exchange chamber and the second heat exchange chamber respectively;

[0012] The control module is configured to control the connection state of the reversing device, control the opening of the heat exchange chamber and the connection port connected to the fresh air duct and the exhaust air duct, and control the refrigerant flow direction so that the fresh air duct and the exhaust air duct match the operating mode.

[0013] The two ends of the fresh air duct are connected to the outdoor air inlet and the indoor air supply outlet, respectively, and the two ends of the exhaust air duct are connected to the indoor return air outlet and the outdoor exhaust air outlet, respectively.

[0014] The adsorption element is provided in both the first heat exchange chamber and the second heat exchange chamber for adsorbing or releasing moisture.

[0015] Furthermore, the reversing device has two components: an indoor reversing device and an outdoor reversing device. The inner cavities of the indoor and outdoor reversing devices are respectively divided by partitions to form four sub-cavities. The four sub-cavities of the indoor reversing device are respectively connected to the indoor return air vent, the indoor supply air vent, the first heat exchange chamber, and the second heat exchange chamber. The four sub-cavities of the outdoor reversing device are respectively connected to the outdoor air inlet, the outdoor exhaust air vent, the first heat exchange chamber, and the second heat exchange chamber.

[0016] The control module controls the opening and closing states of the partitions of the indoor and outdoor reversing devices, controls the heat exchange chambers connected by the fresh air duct and the exhaust air duct, and controls the refrigerant flow direction so that the fresh air duct and the exhaust air duct match the operating mode.

[0017] Furthermore, the partition includes:

[0018] The fixing frame has two parts, namely a first fixing frame and a second fixing frame, which are cross-fixed in the valve cavity;

[0019] The louvers are multiple in number and are connected to the fixed frame via pivots.

[0020] The first driving device is connected to the rotating shaft through a transmission mechanism and is controlled by the control module. It is used to drive the louvers to rotate. The rotation of the louvers between two adjacent sub-cavities can open or close, thereby connecting or separating the two sub-cavities.

[0021] Furthermore, the reversing device is a cylindrical structure, and the four sub-cavities of the reversing device are a first sub-cavity, a second sub-cavity, a third sub-cavity, and a fourth sub-cavity. The connection ports of the first sub-cavity and the fourth sub-cavity are the first connection port and the fourth connection port, respectively, and the first and fourth connection ports are opened opposite each other on the cylindrical surface of the cylindrical structure. The connection ports of the second and third sub-cavities are the second connection port and the third connection port, respectively, and the second and third connection ports are opened on the first bottom surface of the cylindrical structure. The fresh air device also includes:

[0022] The second driving device is used to drive the second fixed frame to rotate around the axis. Two first baffles are fixed on the side of the second fixed frame near the first bottom surface. The two first baffles extend toward the side where the first sub-cavity and the fourth sub-cavity are located, respectively. Two second baffles are fixed on the first bottom surface. The two second baffles are located in the first sub-cavity and the fourth sub-cavity, respectively. When the first baffle rotates, its projection on the first bottom surface does not overlap with or at least partially overlaps with the second baffle, which is used to adjust the opening of the communication port.

[0023] The reversing device is an indoor reversing device and / or an outdoor reversing device.

[0024] Furthermore, the control method for the control module to control the indoor commutator and / or the outdoor commutator is as follows:

[0025] Determine the operating mode and the current opening status of the louvers in each fixed frame, and determine the matching status between the current opening status of the louvers in each fixed frame and the operating mode.

[0026] When the matching state is mismatched, the louver that should be activated and its target state are determined. Based on the target state of the louver, the rotation direction and rotation angle of the corresponding drive device are determined, and the drive device is controlled to operate.

[0027] Furthermore, the method by which the control module adjusts the opening of the communication port is as follows:

[0028] Detect changes in the windshield and the amount of change;

[0029] Determine the opening degree corresponding to the change in windshield;

[0030] Determine the rotation direction and rotation angle of the first fixed frame;

[0031] The second drive device is controlled to rotate in the stated rotation direction and rotation angle.

[0032] Furthermore, the first fixed frame includes two frame pieces that are independently arranged, and the second driving device has two parts, which are respectively used to drive the two frame pieces of the first fixed frame to rotate;

[0033] The control module also includes a step of controlling the micro-positive pressure mode, and the method for controlling the opening of the connection port is as follows:

[0034] Identify the sub-cavity connected to the exhaust duct as the sub-cavity to be adjusted;

[0035] The frame piece connected to the first baffle located in the sub-cavity to be adjusted is rotated in a direction away from the second baffle located in the sub-cavity to be adjusted.

[0036] Furthermore, the indoor reversing device and the outdoor reversing device each have four connection ports that communicate with their respective internal cavities.

[0037] The first connection port of the indoor reversing device is connected to the indoor return air vent, the fourth connection port of the indoor reversing device is connected to the indoor supply air vent, the second connection port of the indoor reversing device is connected to one of the first heat exchange chamber and the second heat exchange chamber, and the third connection port of the indoor reversing device is connected to the other of the first heat exchange chamber and the second heat exchange chamber. The control module controls the connection status between the four connection ports of the indoor reversing device, and is used to connect the first connection port of the indoor reversing device to its second connection port, connect the fourth connection port of the indoor reversing device to its third connection port, or connect the first connection port of the indoor reversing device to its third connection port and connect the fourth connection port of the indoor reversing device to its second connection port.

[0038] The first connection port of the outdoor reversing device is connected to the outdoor exhaust port, the fourth connection port of the outdoor reversing device is connected to the outdoor air inlet, the second connection port of the outdoor reversing device is connected to one of the first heat exchange chamber and the second heat exchange chamber, and the third connection port of the outdoor reversing device is connected to the other of the first heat exchange chamber and the second heat exchange chamber. The control module controls the connection status between the four connection ports of the outdoor reversing device, and is used to connect the first connection port of the outdoor reversing device to its second connection port, connect the fourth connection port of the outdoor reversing device to its third connection port, or connect the first connection port of the outdoor reversing device to its third connection port and connect the fourth connection port of the outdoor reversing device to its second connection port.

[0039] Furthermore, the operating modes include a cooling mode and a heating mode;

[0040] In cooling mode, the fresh air duct is connected to the heat exchange chamber where the evaporator is located, and the exhaust air duct is connected to the heat exchange chamber where the condenser is located;

[0041] In heating mode, the fresh air duct is connected to the heat exchange chamber where the condenser is located, and the exhaust air duct is connected to the heat exchange chamber where the evaporator is located;

[0042] The control module also includes controlling the flow direction of the refrigerant, so that one of the first heat exchanger and the second heat exchanger functions as an evaporator and the other as a condenser.

[0043] The operating modes further include dehumidification mode and humidification mode;

[0044] In dehumidification mode, the fresh air duct is connected to the heat exchange chamber where the evaporator is located, and the exhaust air duct is connected to the heat exchange chamber where the condenser is located.

[0045] In humidification mode, the fresh air duct is connected to the heat exchange chamber where the condenser is located, and the exhaust air duct is connected to the heat exchange chamber where the evaporator is located;

[0046] The control module also includes acquiring the adsorption capacity of the adsorption element or acquiring the humidity of the fresh air input into the room. In dehumidification mode, when the adsorption capacity of the evaporator's adsorption element decreases or the humidity of the fresh air input into the room is greater than the set value; or, in humidification mode, when the release capacity of the condenser's adsorption element decreases or the humidity of the fresh air input into the room is less than the set value, the flow direction of the refrigerant is switched, and at the same time, the indoor reversing device and the outdoor reversing device are switched.

[0047] Compared with the prior art, the advantages and positive effects of the present invention are:

[0048] The fresh air device involved in this application, by setting a reversing device, connects to the first and second heat exchange chambers on one side, and to the fresh air duct and exhaust air duct respectively on the other side. By controlling the reversing device, the connection states of the fresh air duct and exhaust air duct to the first and second heat exchange chambers can be switched. Simultaneously, it can be coordinated with the refrigerant flow direction to achieve the interchange of cooling and heating functions of the two heat exchange chambers. It can switch the heat exchange chambers connected to the fresh air duct and exhaust air duct, but the air conditioning operation mode remains unchanged. It is particularly suitable for fresh air devices that require switching between the fresh air duct and exhaust air duct to achieve dehumidification or humidification functions.

[0049] In addition, air volume regulation was achieved by adjusting the opening of the connection ports between the fresh air duct and the exhaust air duct and the two reversing devices, respectively.

[0050] This solution has a simple structure and low manufacturing cost. Furthermore, its control logic is simple and easy to implement.

[0051] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0052] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0053] Figure 1 This is a schematic diagram of the structure of one embodiment of the fresh air device proposed in this invention;

[0054] Figure 2 yes Figure 1 Schematic diagram of the reversing device in the middle chamber;

[0055] Figure 3 yes Figure 2 A schematic diagram of the rear structure;

[0056] Figure 4 yes Figure 2 A schematic diagram of the orthographic projection;

[0057] Figure 5 yes Figure 2 A schematic diagram of one of the connection states of the indoor reversing device;

[0058] Figure 6 yes Figure 2 A schematic diagram of another connection state of the indoor reversing device;

[0059] Figure 7 This is a system schematic diagram of the cooling mode (dehumidification mode) of an embodiment of the fresh air device proposed in this invention;

[0060] Figure 8 This is a system schematic diagram of the heating mode (humidification mode) of one embodiment of the fresh air device proposed in this invention;

[0061] Figure 9 yes Figure 7 A schematic diagram of the system after commutation;

[0062] Figure 10 This is a schematic diagram of the refrigerant system of the fresh air device proposed in this invention;

[0063] Figure 11 This is a flowchart of the control method for the reversing device of the fresh air device proposed in this invention;

[0064] Figure 12 This is a flowchart of another control method for the reversing device of the fresh air device proposed in this invention. Detailed Implementation

[0065] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0066] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0067] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0068] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0069] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0070] The following disclosure provides many different embodiments or examples for implementing various structures of the present invention. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0071] refer to Figure 1-4 The present invention proposes a fresh air device, which includes an outer shell 10, on which an outdoor air inlet OA, an outdoor air outlet EA, an indoor air supply outlet SA, and an indoor return air outlet RA are formed. A first heat exchange chamber 11 and a second heat exchange chamber 12 are formed inside the outer shell 10.

[0072] The heat exchange assembly includes a first heat exchanger 13 and a second heat exchanger 14, wherein the first heat exchanger 13 is disposed in the first heat exchange chamber 11 and the second heat exchanger 14 is disposed in the second heat exchange chamber 12.

[0073] The fresh air device in this embodiment also includes a reversing device, which is connected to the first heat exchange chamber 11 and the second heat exchange chamber 12 respectively.

[0074] The control module is configured to control the connection status of the reversing device, control the heat exchange chambers connected to the fresh air duct and the exhaust air duct, and control the refrigerant flow direction so that the fresh air duct and the exhaust air duct match the operating mode.

[0075] The control module can also control the opening of the connection between the fresh air duct and the exhaust air duct and the reversing device to achieve air volume regulation.

[0076] In this embodiment, there are two reversing devices: an indoor reversing device 20 and an outdoor reversing device 30. The control module controls the reversal of the connection ports of the indoor reversing device 20 and the outdoor reversing device 30, so that the fresh air duct is connected to one of the first heat exchange chamber 11 and the second heat exchange chamber 12, and the exhaust air duct is connected to the other of the first heat exchange chamber 11 and the second heat exchange chamber 12.

[0077] like Figure 9 As shown, the heat exchange assembly is connected in sequence through the refrigerant pipe compressor 40, the four-way valve 50 and the electronic expansion valve 60 to form a closed refrigerant circulation path and realize the delivery of refrigerant.

[0078] like Figure 1 As shown, a fresh air fan 70 is installed in the fresh air duct to draw outdoor air into the room, and an exhaust fan 80 is installed in the exhaust air duct to exhaust indoor air to the outside.

[0079] In this embodiment, the valve chamber of the indoor reversing device 20 is divided into four sub-chambers by its partition. Each of the four sub-chambers has a connection port, and the four connection ports of the indoor reversing device 20 are respectively connected to the indoor return air vent RA, the indoor supply air vent SA, the first heat exchange chamber 11, and the second heat exchange chamber 12.

[0080] Similar to the structure of the indoor reversing device 20, the valve chamber of the outdoor reversing device 30 is also divided into four sub-chambers by its partition. Each of the four sub-chambers has a connection port, and the four connection ports of the outdoor reversing device 30 are respectively connected to the outdoor air inlet OA, the outdoor air outlet EA, the first heat exchange chamber 11, and the second heat exchange chamber 12.

[0081] The partitions of the indoor reversing device 20 and the outdoor reversing device 30 can be opened or closed. The control module is configured to control the opening and closing state of the partitions of the two reversing devices, control the heat exchange chambers connected by the fresh air duct and the exhaust air duct, and control the refrigerant flow direction so that the fresh air duct and the exhaust air duct match the operating mode.

[0082] The control module controls the refrigerant flow by switching the four-way valve 50, thereby enabling the first heat exchanger 13 to perform either cooling or heating. When the first heat exchanger 13 is cooling, the second heat exchanger 14 is heating. When the first heat exchanger 13 is heating, the second heat exchanger 14 is cooling.

[0083] The fresh air duct has an outdoor air inlet (OA) and an indoor air supply outlet (SA) at both ends, and an indoor return air outlet (RA) and an outdoor exhaust air outlet (EA) at both ends.

[0084] The fresh air device in this embodiment has an indoor reversing device 20 and an outdoor reversing device 30 installed at both ends of the first heat exchange chamber 11 and the second heat exchange chamber 12. The four connection ports of the indoor reversing device 20 are respectively connected to the indoor return air vent RA, the indoor supply air vent SA, the first heat exchange chamber 11 and the second heat exchange chamber 12. The four connection ports of the outdoor reversing device 30 are respectively connected to the outdoor air inlet OA, the outdoor exhaust air vent EA, the first heat exchange chamber 11 and the second heat exchange chamber 12. The first heat exchange chamber 11 is provided with a first heat exchanger 13, and the second heat exchange chamber 12 is provided with a second heat exchanger 14.

[0085] The refrigeration system can switch between the cooling and heating functions of the two heat exchange chambers by changing the flow direction of the refrigerant. At the same time, it can control the opening and closing state of the partition of the two reversing devices, thereby changing the connection state between the connection ports of the indoor reversing device 20 and the outdoor reversing device 30. This can achieve the switching of the heat exchange chambers connected by the fresh air duct and the exhaust air duct, but the air conditioning operation mode remains unchanged. It is especially suitable for fresh air devices that need to switch between the fresh air duct and the exhaust air duct in order to achieve dehumidification or humidification functions.

[0086] This solution has a simple structure and low manufacturing cost. Furthermore, its control logic is simple and easy to implement.

[0087] The indoor reversing device 20 and the outdoor reversing device 30 are respectively provided with a partition. In this embodiment, the partition 205 in the indoor reversing device 20 is used as an example for explanation.

[0088] like Figures 2-4 As shown, the four valve chambers of the indoor reversing device 20 are respectively provided with a connection port, namely the first connection port 201, the second connection port 202, the third connection port 203 and the fourth connection port 204. The four connection ports correspond one-to-one with the first sub-chamber, the second sub-chamber, the third sub-chamber and the fourth sub-chamber.

[0089] The partition 205 includes two fixed frames, namely a first fixed frame 2051 and a second fixed frame 2052, which are cross-fixed in the valve cavity. Multiple louvers 208 are arranged in the fixed frames, and the louvers 208 are sequentially and parallelly connected to the fixed frames via a rotating shaft. The partition 205 also includes a first driving device (not shown in the figure), which is connected to the rotating shaft via a transmission mechanism. The first driving device receives control from the control module and can drive the rotating shaft to rotate, thereby driving the louvers 208 located in the same fixed frame to rotate synchronously around the shaft. When the louvers 208 rotate to a specific angle, they can open or close, thereby connecting or isolating the sub-cavities on both sides of the louvers 208. This achieves the following: Figure 5 The diagram shows that the first connection port 201 is connected to the third connection port 203, and the second connection port 202 is connected to the fourth connection port 204.

[0090] Or, in turn, to achieve such Figure 6 The diagram shows that the first connection port 201 is connected to the second connection port 202, and the third connection port 203 is connected to the fourth connection port 204.

[0091] In this embodiment, the first connection port 201 of the indoor reversing device 20 is connected to the indoor return air vent RA, the fourth connection port 204 of the indoor reversing device is connected to the indoor supply air vent SA, the second connection port 202 of the indoor reversing device is connected to one of the first heat exchange chamber 11 and the second heat exchange chamber 12, and the third connection port 203 of the indoor reversing device is connected to the other of the first heat exchange chamber 11 and the second heat exchange chamber 12. The control module controls the connection status between the four connection ports of the indoor reversing device, and is used to connect the first connection port 201 of the indoor reversing device with its second connection port 202, connect the fourth connection port 204 of the indoor reversing device with its third connection port 203, or connect the first connection port 201 of the indoor reversing device with its third connection port 203 and connect the fourth connection port 204 of the indoor reversing device with its second connection port 202.

[0092] A third partition is provided between the first heat exchange chamber 11 and the second heat exchange chamber 12. The installation direction of the third partition can be horizontal, so the first heat exchanger 13 and the second heat exchanger 14 are arranged vertically.

[0093] Of course, the installation direction of the third partition is not limited to horizontal setting. It can be set vertically in the heat exchange cavity or set at an angle in the heat exchange cavity. The first heat exchanger 13 and the second heat exchanger 14 are located on both sides of the third partition.

[0094] The positions of the four connection ports on the indoor reversing device 20 can be determined according to the internal space of the outer casing 10. The four connection ports can each face four different directions, or some connection ports can face the same direction. In this embodiment, the first connection port 201 and the fourth connection port 204 are coaxially arranged and have opposite opening directions, while the second connection port 202 and the third connection port 203 are arranged with parallel axes and have the same opening direction.

[0095] like Figure 2 As shown, in this embodiment, the axes of the four connection ports on the indoor reversing device 20 are all horizontally arranged. The valve chamber of the indoor reversing device 20 has at least two opposing arc surfaces and two planes perpendicular to the arc surfaces. The third interface 203 is located above the second interface 202. Of course, the third interface 203 can also be located below the second interface 202.

[0096] The first to fourth sub-cavities of the outdoor reversing device 30 correspond one-to-one with its first connection port 301, second connection port 302, third connection port 303, and fourth connection port 304. The first connection port 301 of the outdoor reversing device is connected to the outdoor exhaust port EA, the fourth connection port 304 of the outdoor reversing device is connected to the outdoor air inlet OA, the second connection port 302 of the outdoor reversing device is connected to one of the first heat exchange chamber 11 and the second heat exchange chamber 12, and the third connection port 303 of the outdoor reversing device is connected to the other one of the first heat exchange chamber 11 and the second heat exchange chamber 12. The control module controls the connection status between the four connection ports of the outdoor reversing device, and is used to connect the first connection port 301 of the outdoor reversing device to its second connection port 302, connect the fourth connection port 304 of the outdoor reversing device to its third connection port 303, or connect the first connection port 301 of the outdoor reversing device to its third connection port 303 and connect the fourth connection port 304 of the outdoor reversing device to its second connection port 302.

[0097] The structure of the outdoor reversing device 30 is similar to that of the indoor reversing device 20, and will not be described in detail here.

[0098] Generally, the indoor and / or outdoor reversing devices are controlled when the fresh air unit is powered on, during operation, when the user manually controls the switching, or when the system automatically determines that reversing is required.

[0099] In this embodiment, the switching of the indoor and outdoor switching devices is achieved by connecting their different connection ports through the rotation state of the louver 208, thereby realizing the switching. Therefore, as shown in the figure, the control method of the control module to control the indoor and / or outdoor switching devices in this embodiment is as follows:

[0100] Determine the operating mode and the current opening status of the louvers in each fixed frame, and determine the matching status between the current opening status of the louvers in each fixed frame and the operating mode.

[0101] When the matching status is mismatched, the corresponding louvers are controlled to rotate, and the reversing device performs a reversal.

[0102] The commutation steps of the control commutation device include: Figure 11 As shown, the louver that should be activated and its target state are determined. Based on the target state of the louver, the rotation direction and rotation angle of the corresponding first drive device are determined, and the first drive device is controlled to operate.

[0103] The method to determine the current opening status of the louvers in each fixed frame is to query the opening status of the louvers in each fixed frame recorded in the memory.

[0104] After receiving the shutdown signal, the process also includes a step of controlling all blades to reset, controlling the first drive device to rotate all blades to the reset position;

[0105] When the machine is powered on again, the reset position will be used as the current open state of the louvers in each fixed frame.

[0106] The first drive unit has two parts, which respectively drive the louvers in the two fixed frames.

[0107] The commutator is a cylindrical structure, such as Figure 2 As shown, the indoor reversing device 20 will still be used as an example for explanation.

[0108] The first connection port 201 and the fourth connection port 204 of the indoor reversing device 20 are respectively opened on the cylindrical surface of the cylindrical structure, and the second connection port 202 and the third connection port 203 are opened on the first bottom surface of the cylindrical structure. The fresh air device also includes:

[0109] The second driving device (not shown in the figure) is used to drive the second fixed frame 2052 to rotate around the axis. Two first baffles 206 are fixed on the side of the second fixed frame 2052 near the first bottom surface. The two first baffles 206 extend toward the side where the first sub-cavity and the fourth sub-cavity are located, respectively. Two second baffles 207 are fixed on the first bottom surface. The two second baffles 207 are located in the first sub-cavity and the fourth sub-cavity, respectively. When the second fixed frame 2052 drives the first baffles 206 to rotate, its projection on the first bottom surface does not overlap with the second baffles 207 or at least partially overlaps with them. Since the second connection port 202 and the third connection port 203 are opened on the first bottom surface of the cylindrical structure, and a fixed second baffle 207 and a movable first baffle 206 are provided on the first bottom surface, the opening degree of the second connection port 202 and the third connection port 203 can be adjusted by rotating the first baffle 206.

[0110] Specifically, when the projection of the first baffle 206 on the first bottom surface overlaps the second baffle 207 the most, the opening of the second connection port 202 and the third connection port 203 is the largest; when the projection of the first baffle 206 on the first bottom surface overlaps the second baffle 207 the least, the opening of the second connection port 202 and the third connection port 203 is the smallest.

[0111] The structure of the outdoor commutator 30 is similar to that of the indoor commutator, and will not be described in detail here.

[0112] like Figure 12 As shown, the method by which the control module adjusts the opening of the connection port is as follows:

[0113] Detects changes in fan speed and the amount of change. Changes in fan speed may be triggered by user adjustments or automatically adjusted by the system. The fan speed can increase or decrease. The amount of change refers to how many speeds the fan speed has increased or decreased from the current setting.

[0114] Determine the opening degree corresponding to the change in windshield. Understandably, when the windshield is increased, the opening degree of the connecting opening needs to be increased as well. Conversely, when the windshield is decreased, the opening degree of the connecting opening needs to be decreased.

[0115] Determine the rotation direction and rotation angle of the second fixed frame. When the reversing device and its internal structure are determined, the opening adjustment state of the connecting port corresponding to the rotation direction and rotation angle of the second fixed frame 2052 is determined. Therefore, the rotation direction and rotation angle of the first fixed frame can be determined by the change in the windshield.

[0116] Control the second drive device to rotate according to the rotation direction and rotation angle.

[0117] For example, when the air volume is adjusted from the maximum setting to the N2 setting, the second fixed frame 2052 and its bottom first baffle 206 rotate counterclockwise by a set angle, and the second fixed frame 2052 reaches the predetermined position. In order to prevent the second fixed frame 2052 from changing under the action of air pressure, the limit function is activated. When a reversal command is received again, the limit of the second fixed frame 2052 is released, and then it rotates clockwise to the reset state. Then the louvers of the second fixed frame 2052 open, and the louvers of the first fixed frame 2051 close, realizing the interchange of the heat exchange chambers connected to the fresh air duct and the exhaust air duct.

[0118] The second fixed frame 2052 includes two independently arranged frame pieces, namely frame piece 2052a and frame piece 2052b. Two second driving devices are provided, one for driving frame piece 2052a and the other for driving frame piece 2052b to rotate. By controlling the two frame pieces of the second fixed frame 2052 to rotate independently, the opening degree of the connection between the fresh air duct and the exhaust air duct can be independently adjusted.

[0119] To maintain a slight positive pressure indoors, the fresh air volume needs to be slightly greater than the exhaust air volume. With the exhaust fan motor speed remaining constant, this can be achieved by reducing the opening of the exhaust duct's connection point. This fresh air system can achieve a slight positive pressure by keeping the fresh air volume constant (i.e., keeping the fresh air duct's connection point's opening constant) while reducing the opening of the exhaust duct's connection point.

[0120] The control module also includes steps for controlling the micro-positive pressure mode, and the method for determining the opening degree of the connection port is as follows:

[0121] Identify the sub-cavity connected to the exhaust duct as the sub-cavity to be adjusted;

[0122] The frame connected to the first baffle located in the sub-cavity to be adjusted is rotated in a direction away from the second baffle located in the sub-cavity to be adjusted, that is, the opening of the exhaust channel is rotated in a direction that is reduced.

[0123] In addition, the opening of the exhaust duct can be kept constant while the opening of the fresh air duct can be increased to achieve a slight positive pressure.

[0124] The operating modes of the fresh air device in this embodiment include cooling mode and heating mode.

[0125] In cooling mode, the fresh air duct is connected to the heat exchange chamber where the evaporator is located, and the exhaust air duct is connected to the heat exchange chamber where the condenser is located.

[0126] The control module also includes controlling the flow of refrigerant, so that one of the first heat exchanger 13 and the second heat exchanger 14 acts as an evaporator and the other as a condenser.

[0127] In heating mode, the fresh air duct is connected to the heat exchange chamber where the condenser is located, and the exhaust air duct is connected to the heat exchange chamber where the evaporator is located.

[0128] In this embodiment, the second connection port 202 of the indoor reversing device is connected to the second heat exchange chamber 12, the third connection port 203 of the indoor reversing device is connected to the first heat exchange chamber 11, the second connection port 302 of the outdoor reversing device is connected to the second heat exchange chamber 12, and the third connection port 303 of the outdoor reversing device is connected to the first heat exchange chamber 11 as an example.

[0129] Cooling Mode

[0130] like Figure 7 As shown, the control module controls the refrigerant flow direction in the four-way valve. The first heat exchanger 13 acts as an evaporator, and the second heat exchanger 14 acts as a condenser. The control module connects the first connection port 301 of the outdoor reversing device to its second connection port 302, and connects the third connection port 303 of the outdoor reversing device to its fourth connection port 304. The third connection port 303 of the outdoor reversing device is connected to the first heat exchange chamber 11 where the first heat exchanger 13 is located, and the second connection port 302 of the outdoor reversing device is connected to the second heat exchange chamber 12 where the second heat exchanger 14 is located.

[0131] Connect the first connection port 201 of the indoor reversing device to its second connection port 202, and connect the third connection port 203 of the indoor reversing device to its fourth connection port 204. The third connection port 203 of the indoor reversing device is connected to the first heat exchange chamber 11 where the first heat exchanger 13 is located, and the second connection port 202 of the indoor reversing device is connected to the second heat exchange chamber 12 where the second heat exchanger 14 is located.

[0132] The fresh air duct consists of: outdoor air inlet OA - fourth connection port 304 (outdoor) - third connection port 303 (outdoor) - first heat exchange chamber 11 (evaporator) - third connection port 203 (indoor) - fourth connection port 204 (indoor) - indoor air outlet SA. Outdoor air entering the room releases heat to the refrigerant in the fresh air duct to cool down.

[0133] The exhaust duct consists of: indoor return air inlet RA - first connection port 201 (indoor) - second connection port 202 (indoor) - second heat exchange chamber 12 (condenser) - second connection port 302 (outdoor) - first connection port 301 (outdoor) - outdoor exhaust air inlet EA. The return air exhausted from indoors to the outside absorbs the heat released by the refrigerant in the exhaust duct and becomes warmer.

[0134] <Heating Mode>

[0135] Switching from cooling mode to heating mode can be achieved in two ways: First, the refrigerant flow direction can be changed independently, while the airflow path remains the same. Second, the fresh air duct and refrigerant duct can be switched independently, while the refrigerant flow direction remains unchanged. This embodiment will illustrate the method of keeping the refrigerant flow direction unchanged. Figure 8 As shown, the first heat exchanger 13 still functions as an evaporator, and the second heat exchanger 14 functions as a condenser. The control connects the first connection port 301 of the outdoor reversing device to its third connection port 303, and the second connection port 302 of the outdoor reversing device to its fourth connection port 304. The third connection port 303 of the outdoor reversing device is connected to the first heat exchange chamber 11 where the first heat exchanger 13 is located, and the second connection port 302 of the outdoor reversing device is connected to the second heat exchange chamber 12 where the second heat exchanger 14 is located.

[0136] Connect the first connection port 201 of the indoor reversing device to its third connection port 203, and connect the second connection port 202 of the indoor reversing device to its fourth connection port 204. The third connection port 203 of the indoor reversing device is connected to the first heat exchange chamber 11 where the first heat exchanger 13 is located, and the second connection port 202 of the indoor reversing device is connected to the second heat exchange chamber 12 where the second heat exchanger 14 is located.

[0137] The fresh air duct consists of: outdoor air inlet OA - fourth connection port 304 (outdoor) - second connection port 302 (outdoor) - second heat exchange chamber 12 (condenser) - second connection port 202 (indoor) - fourth connection port 204 (indoor) - indoor air outlet SA. Outdoor air entering the room absorbs heat released by the refrigerant and warms up in the fresh air duct.

[0138] The exhaust duct consists of: indoor return air inlet RA - first connection port 201 (indoor) - third connection port 203 (indoor) - first heat exchange chamber 11 (evaporator) - third connection port 303 (outdoor) - first connection port 301 (outdoor) - outdoor exhaust air inlet EA. The return air exhausted from indoors to the outside releases heat into the refrigerant in the exhaust duct to cool down.

[0139] The adsorption elements are placed inside the heat exchanger or coated on the surface of the heat exchanger in the form of granules wrapped in blocks, sheets, or mesh.

[0140] The adsorption element can be placed in layers or attached to the surface of the heat exchanger as a coating.

[0141] The operating modes include dehumidification mode and humidification mode.

[0142] <Dehumidification Mode>

[0143] In dehumidification mode, the fresh air duct is connected to the heat exchange chamber where the evaporator is located, and the exhaust air duct is connected to the heat exchange chamber where the condenser is located. That is, the connection method of the fresh air duct in this mode is the same as in cooling mode. In this embodiment, it is still based on... Figure 7 The third connection port 203 of the indoor reversing device shown is connected to the first heat exchange chamber 11 where the first heat exchanger 13 is located, and the second connection port 202 of the indoor reversing device is connected to the second heat exchange chamber 12 where the second heat exchanger 14 is located. The first heat exchanger 13 is used as an evaporator and the second heat exchanger 14 is used as a condenser for the following explanation.

[0144] The refrigerant in the first heat exchanger 13 (evaporator) absorbs heat from the air, and the moisture in the air condenses into water droplets, which are absorbed by the adsorbent in the evaporator. The outdoor air is dried and then delivered indoors. The refrigerant in the second heat exchanger 14 (condenser) releases heat to the surrounding air, and the moisture in the adsorbent in the condenser is evaporated, released into the air, and carried away to the outside by the airflow directed to the outside.

[0145] When the adsorbent in the first heat exchanger 13 (evaporator) reaches saturation, the adsorbent in the second heat exchanger 14 (condenser) is simultaneously dried. Figure 9 As shown, by controlling the reversing device, the fresh air duct passes through the second heat exchanger chamber 12, and the exhaust air duct passes through the first heat exchanger chamber 11. At the same time, the refrigerant is reversed, so that the second heat exchanger 14 becomes an evaporator and the first heat exchanger 13 becomes a condenser. The outdoor air entering continues to be dehumidified and dried by the adsorption element of the second heat exchanger 14 before being delivered indoors.

[0146] Humidification Mode

[0147] In humidification mode, the fresh air duct is connected to the heat exchange chamber where the condenser is located, and the exhaust air duct is connected to the heat exchange chamber where the evaporator is located. That is, the connection method of the fresh air duct in this mode is the same as in heating mode. In this embodiment, it is still based on... Figure 8 The first heat exchanger 13 shown in the diagram serves as an evaporator, and the second heat exchanger 14 serves as a condenser. The control connects the first connection port 301 of the outdoor reversing device to its third connection port 303, and the second connection port 302 of the outdoor reversing device to its fourth connection port 304. The third connection port 303 of the outdoor reversing device is connected to the first heat exchange chamber 11 where the first heat exchanger 13 is located, and the second connection port 302 of the outdoor reversing device is connected to the second heat exchange chamber 12 where the second heat exchanger 14 is located.

[0148] Connect the first connection port 201 of the indoor reversing device to its third connection port 203, and connect the second connection port 202 of the indoor reversing device to its fourth connection port 204. The third connection port 203 of the indoor reversing device is connected to the first heat exchange chamber 11 where the first heat exchanger 13 is located, and the second connection port 202 of the indoor reversing device is connected to the second heat exchange chamber 12 where the second heat exchanger 14 is located.

[0149] When the adsorbent of the second heat exchanger 14 (condenser) is dried, it loses its ability to release moisture. At this time, the control reversing device reverses the direction, so that the fresh air channel is connected to the first heat exchange chamber 11. At the same time, the first heat exchanger 13 switches to condenser, and the adsorbent of the first heat exchanger 13 continues to release moisture into the fresh air.

[0150] The control module also includes acquiring the adsorption capacity of the adsorption element or the humidity of the fresh air input into the room. In dehumidification mode, when the adsorption capacity of the evaporator's adsorption element decreases or the humidity of the fresh air input into the room is greater than the set value; or in humidification mode, when the release capacity of the condenser's adsorption element decreases or the humidity of the fresh air input into the room is less than the set value, the flow direction of the refrigerant is switched, and at the same time, the indoor reversing device and the outdoor reversing device are switched.

[0151] The adsorption or release capacity of the adsorbent can be determined by the duration of continuous airflow through the same heat exchange chamber in the fresh air duct. This duration can be set in the laboratory. The longer the fresh air duct continuously passes through the same heat exchange chamber, the lower the adsorption or release capacity of the adsorbent.

[0152] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

[0153] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A fresh air device, characterized in that, include: An outer shell has an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet, and an indoor air return outlet formed thereon. A first heat exchange chamber and a second heat exchange chamber are formed inside the outer shell. The heat exchange assembly includes a first heat exchanger disposed in the first heat exchange chamber and a second heat exchanger disposed in the second heat exchange chamber; A reversing device, which is connected to the first heat exchange chamber and the second heat exchange chamber respectively; The control module is configured to control the connection state of the reversing device, control the opening of the heat exchange chamber and the connection port connected to the fresh air duct and the exhaust air duct, and control the refrigerant flow direction so that the fresh air duct and the exhaust air duct match the operating mode. The two ends of the fresh air duct are connected to the outdoor air inlet and the indoor air supply outlet, respectively, and the two ends of the exhaust air duct are connected to the indoor return air outlet and the outdoor exhaust air outlet, respectively. Adsorption elements are provided in both the first heat exchange chamber and the second heat exchange chamber for adsorbing or releasing moisture. The commutation device has two parts: an indoor commutation device and an outdoor commutation device. The inner cavities of the indoor reversing device and the outdoor reversing device are respectively divided by the partition to form four sub-cavities. The four sub-cavities of the indoor reversing device are respectively connected to the indoor return air vent, the indoor supply air vent, the first heat exchange cavity and the second heat exchange cavity. The four sub-cavities of the outdoor reversing device are respectively connected to the outdoor air inlet, the outdoor exhaust air vent, the first heat exchange cavity and the second heat exchange cavity. The control module controls the opening and closing states of the partitions of the indoor and outdoor reversing devices, controls the heat exchange chambers connected by the fresh air duct and the exhaust air duct, and controls the refrigerant flow direction so that the fresh air duct and the exhaust air duct match the operating mode. The corresponding partitions respectively disposed in the inner cavity of the indoor reversing device and the inner cavity of the outdoor reversing device include: The fixing frame has two parts, namely a first fixing frame and a second fixing frame, which are respectively fixed crosswise in the corresponding inner cavity; The louvers are multiple in number and are connected to the fixed frame via pivots. The first driving device is connected to the rotating shaft through a transmission mechanism and is controlled by the control module. It is used to drive the louvers to rotate. The rotation of the louvers between two adjacent sub-cavities can open or close, thereby connecting or separating the two sub-cavities.

2. The fresh air device according to claim 1, characterized in that, The reversing device has a cylindrical structure, and its four sub-cavities are designated as a first sub-cavity, a second sub-cavity, a third sub-cavity, and a fourth sub-cavity. The connection ports of the first and fourth sub-cavities are designated as a first connection port and a fourth connection port, respectively, and are located opposite each other on the cylindrical surface of the cylindrical structure. The connection ports of the second and third sub-cavities are designated as a second connection port and a third connection port, respectively, and are located on the first bottom surface of the cylindrical structure. The fresh air device also includes: The second driving device is used to drive the second fixed frame to rotate around the axis. Two first baffles are fixed on the side of the second fixed frame near the first bottom surface. The two first baffles extend toward the side where the first sub-cavity and the fourth sub-cavity are located, respectively. Two second baffles are fixed on the first bottom surface. The two second baffles are located in the first sub-cavity and the fourth sub-cavity, respectively. When the first baffle rotates, its projection on the first bottom surface does not overlap with or at least partially overlaps with the second baffle, which is used to adjust the opening of the communication port. The reversing device is an indoor reversing device and / or an outdoor reversing device.

3. The fresh air device according to claim 1, characterized in that, The control method by which the control module controls the indoor reversing device and / or the outdoor reversing device is as follows: Determine the operating mode and the current opening status of the louvers in each fixed frame, and determine the matching status between the current opening status of the louvers in each fixed frame and the operating mode. When the matching state is mismatched, the louver that should be activated and its target state are determined. Based on the target state of the louver, the rotation direction and rotation angle of the corresponding drive device are determined, and the drive device is controlled to operate.

4. The fresh air device according to claim 2, characterized in that, The method by which the control module adjusts the opening of the communication port is as follows: Detect changes in the windshield and the amount of change; Determine the opening degree corresponding to the change in windshield; Determine the rotation direction and rotation angle of the first fixed frame; The second drive device is controlled to rotate in the stated rotation direction and rotation angle.

5. The fresh air device according to claim 4, characterized in that, The first fixed frame includes two frame pieces that are independently arranged, and the second driving device has two pieces, which are used to drive the two frame pieces of the first fixed frame to rotate respectively; The control module also includes a step of controlling the micro-positive pressure mode, and the method for controlling the opening of the connection port is as follows: Identify the sub-cavity connected to the exhaust duct as the sub-cavity to be adjusted; The frame piece connected to the first baffle located in the sub-cavity to be adjusted is rotated in a direction away from the second baffle located in the sub-cavity to be adjusted.

6. The fresh air device according to claim 1, characterized in that, The indoor reversing device and the outdoor reversing device each have four connection ports that communicate with their respective internal cavities; The first connection port of the indoor reversing device is connected to the indoor return air vent, the fourth connection port of the indoor reversing device is connected to the indoor supply air vent, the second connection port of the indoor reversing device is connected to one of the first heat exchange chamber and the second heat exchange chamber, and the third connection port of the indoor reversing device is connected to the other of the first heat exchange chamber and the second heat exchange chamber. The control module controls the connection status between the four connection ports of the indoor reversing device, and is used to connect the first connection port of the indoor reversing device to its second connection port, connect the fourth connection port of the indoor reversing device to its third connection port, or connect the first connection port of the indoor reversing device to its third connection port and connect the fourth connection port of the indoor reversing device to its second connection port. The first connection port of the outdoor reversing device is connected to the outdoor exhaust port, the fourth connection port of the outdoor reversing device is connected to the outdoor air inlet, the second connection port of the outdoor reversing device is connected to one of the first heat exchange chamber and the second heat exchange chamber, and the third connection port of the outdoor reversing device is connected to the other of the first heat exchange chamber and the second heat exchange chamber. The control module controls the connection status between the four connection ports of the outdoor reversing device, and is used to connect the first connection port of the outdoor reversing device to its second connection port, connect the fourth connection port of the outdoor reversing device to its third connection port, or connect the first connection port of the outdoor reversing device to its third connection port and connect the fourth connection port of the outdoor reversing device to its second connection port.

7. The fresh air device according to any one of claims 1-6, characterized in that, The operating modes include cooling mode and heating mode; In cooling mode, the fresh air duct is connected to the heat exchange chamber where the evaporator is located, and the exhaust air duct is connected to the heat exchange chamber where the condenser is located; In heating mode, the fresh air duct is connected to the heat exchange chamber where the condenser is located, and the exhaust air duct is connected to the heat exchange chamber where the evaporator is located; The control module also includes controlling the flow direction of the refrigerant, so that one of the first heat exchanger and the second heat exchanger functions as an evaporator and the other as a condenser.

8. The fresh air device according to any one of claims 1-6, characterized in that, The operating modes include dehumidification mode and humidification mode; In dehumidification mode, the fresh air duct is connected to the heat exchange chamber where the evaporator is located, and the exhaust air duct is connected to the heat exchange chamber where the condenser is located. In humidification mode, the fresh air duct is connected to the heat exchange chamber where the condenser is located, and the exhaust air duct is connected to the heat exchange chamber where the evaporator is located; The control module also includes acquiring the adsorption capacity of the adsorption element or acquiring the humidity of the fresh air input into the room. In dehumidification mode, when the adsorption capacity of the evaporator's adsorption element decreases or the humidity of the fresh air input into the room is greater than the set value; or, in humidification mode, when the release capacity of the condenser's adsorption element decreases or the humidity of the fresh air input into the room is less than the set value, the flow direction of the refrigerant is switched, and at the same time, the indoor reversing device and the outdoor reversing device are switched.

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