Fresh air device

Abstract

The application discloses a fresh air device, which comprises an outer shell body, an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet and an indoor return air outlet are formed on the outer shell body, a first heat exchange cavity and a second heat exchange cavity are formed in the outer shell body, a heat exchange assembly comprising a first heat exchanger and a second heat exchanger, a reversing device having a valve cavity and a barrier part, the valve cavity is separated by the barrier part to form four sub-cavities, the four sub-cavities are communicated with a fresh air channel, an exhaust air channel, the first heat exchange cavity and the second heat exchange cavity respectively, a control module configured to control the opening and closing state of the barrier part, control the heat exchange cavities communicated with the fresh air channel and the exhaust air channel, and control the flow direction of refrigerant, so that the fresh air channel and the exhaust air channel are matched with the operation mode, and the fresh air device further comprises a suction accessory, the first heat exchange cavity and the second heat exchange cavity are both provided with the suction accessory. 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 and need to regulate the air. Air conditioning includes temperature and humidity control, and air quality and comfort are increasingly valued by every household and various commercial and office spaces.

[0003] In some fresh air systems, the outdoor air humidity is high in summer. The moisture carried by the outdoor fresh air needs to be absorbed by the adsorption material first, and then carried away by the indoor exhaust air, thus preventing the moisture carried by the outdoor fresh air from entering the room. This process requires the heat exchanger to constantly switch between evaporator and condenser, and the fresh air duct and exhaust duct also need to constantly switch between each other. Therefore, a switching device is needed to allow for free switching of the air ducts.

[0004] To achieve the above objectives, some current fresh air systems use a combination of eight air valves to open and close. However, the number of air valves is large and they occupy a lot of space. If one air valve fails during the process, the system will not be able to work. Summary of the Invention

[0005] The purpose of this invention is to provide a fresh air device to solve the technical problems of complex control valve structure and poor independent operation of each valve in the prior art.

[0006] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0007] A fresh air device, characterized in that it comprises:

[0008] The outer shell has an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet, and an indoor air return outlet. The outer shell also has a first heat exchange chamber and a second heat exchange chamber.

[0009] The heat exchange assembly includes a first heat exchanger disposed in a first heat exchange chamber and a second heat exchanger disposed in a second heat exchange chamber.

[0010] A reversing device having a valve chamber and a partition, wherein the valve chamber is partitioned by the partition to form four sub-chambers, which are respectively connected to a fresh air duct, an exhaust air duct, a first heat exchange chamber and a second heat exchange chamber;

[0011] The control module is configured to control the opening and closing state of the baffle of the reversing device, control the heat exchange chamber 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.

[0012] 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.

[0013] The adsorption element is provided in both the first heat exchange chamber and the second heat exchange chamber for adsorbing or releasing moisture.

[0014] Furthermore, the partition includes:

[0015] Two fixing frames are cross-fixed in the valve cavity;

[0016] The louvers are multiple in number and are connected to the fixed frame via pivots.

[0017] The drive device is connected to the rotating shaft through a transmission mechanism. The drive device is controlled by the control module and is used to drive the louvers to rotate to open or close, and to connect or disconnect the two sub-cavities located on both sides of the louvers.

[0018] Furthermore, the control method by which the control module controls the commutation device is as follows:

[0019] 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.

[0020] When the matching state is mismatched, the corresponding louver is controlled to rotate, and the reversing device performs reversing.

[0021] The reversing device includes an indoor reversing device and / or an outdoor reversing device.

[0022] Furthermore, the reversing step of controlling the reversing device includes: determining the louver that should be activated and its target state, determining the rotation direction and rotation angle of the corresponding drive device according to the target state of the louver, and controlling the drive device to activate.

[0023] Furthermore, the method for determining 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.

[0024] Furthermore, after receiving the shutdown signal, the system also includes a step of controlling the reset of all blades, and controlling the drive device to rotate all blades to the reset position;

[0025] 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.

[0026] Furthermore, the drive device has two parts, each corresponding to drive the louvers in the two fixed frames.

[0027] Furthermore, the reversing device has connection ports that communicate with the four sub-cavities respectively;

[0028] The reversing device has two parts: an indoor reversing device and an outdoor reversing device. 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.

[0029] 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.

[0030] Furthermore, the operating modes include a cooling mode and a heating mode;

[0031] 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;

[0032] 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;

[0033] 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.

[0034] Furthermore, the operating modes include dehumidification mode and humidification mode;

[0035] 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.

[0036] 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;

[0037] 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.

[0038] Compared with the prior art, the advantages and positive effects of the present invention are:

[0039] The fresh air device involved in this invention, 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 state between the fresh air duct and the exhaust air duct and the first and second heat exchange chambers can be switched. Simultaneously, it can be coordinated with the refrigerant flow direction to achieve interchangeability of the cooling and heating functions of the two heat exchange chambers. Furthermore, by controlling the opening and closing state of the partitions of the two reversing devices, the connection state between the indoor and outdoor reversing devices can be changed, enabling switching of the heat exchange chambers connected to the fresh air duct and the exhaust air duct while maintaining the same air conditioning operation mode. This is particularly suitable for fresh air devices that require switching between the fresh air duct and the exhaust air duct to achieve dehumidification or humidification functions.

[0040] This solution has a simple structure and low manufacturing cost. Furthermore, its control logic is simple and easy to implement.

[0041] 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

[0042] 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.

[0043] Figure 1 This is a schematic diagram of the structure of one embodiment of the fresh air device proposed in this invention;

[0044] Figure 2 yes Figure 1 Schematic diagram of the reversing device in the middle chamber;

[0045] Figure 3 yes Figure 2 A schematic diagram of one of the connection states of the indoor reversing device;

[0046] Figure 4 yes Figure 2 A schematic diagram of another connection state of the indoor reversing device;

[0047] Figure 5 This is a system schematic diagram of the cooling mode (dehumidification mode) of an embodiment of the fresh air device proposed in this invention;

[0048] Figure 6 This is a system schematic diagram of the heating mode (humidification mode) of one embodiment of the fresh air device proposed in this invention;

[0049] Figure 7 yes Figure 8 A schematic diagram of the system after commutation;

[0050] Figure 8 This is a schematic diagram of the refrigerant system of the fresh air device proposed in this invention;

[0051] Figure 9 This is a flowchart of the control method for the reversing device of the fresh air device proposed in this invention;

[0052] Figure 10 This is a flowchart of another control method for the reversing device of the fresh air device proposed in this invention. Detailed Implementation

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] refer to Figure 1 , Figure 2 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.

[0060] 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.

[0061] The fresh air device in this embodiment also includes a reversing device, which has a valve chamber and a baffle. The valve chamber is baffled by the baffle to form four sub-chambers, which are respectively connected to the fresh air duct, the exhaust duct, the first heat exchange chamber and the second heat exchange chamber.

[0062] The baffle can be opened or closed. The control module is configured to control the opening and closing state of the baffle, control the heat exchange chamber 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.

[0063] 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.

[0064] like Figure 8 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.

[0065] 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.

[0066] In this embodiment, two reversing devices are provided, namely an indoor reversing device 20 and an outdoor reversing device 30.

[0067] The valve chamber of the indoor reversing device 20 is divided into four sub-chambers by its partition, and the four sub-chambers 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.

[0068] The valve chamber of the outdoor reversing device 30 is divided into four sub-chambers by its partition, and the four sub-chambers 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.

[0069] 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. The fresh air duct is equipped with a fresh air fan for drawing outdoor air into the room, and the exhaust air duct is equipped with an exhaust fan for expelling indoor air to the outside.

[0070] 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.

[0071] 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.

[0072] This solution has a simple structure and low manufacturing cost. Furthermore, its control logic is simple and easy to implement.

[0073] 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.

[0074] like Figure 3 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.

[0075] like Figure 2 As shown, 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. Each fixed frame is provided with multiple louvers 206, which are sequentially and parallelly connected to the fixed frames via a rotating shaft. The partition 205 also includes a drive device (not shown), which is connected to the rotating shaft via a transmission mechanism. The drive device receives control from the control module and can drive the rotating shaft to rotate, thereby causing the louvers 206 located in the same fixed frame to rotate synchronously around the shaft. When the louvers 206 rotate to a specific angle, they can open or close, thereby connecting or isolating the sub-cavities on both sides of the louvers 206. This achieves the connection between the first connection port 201 and the third connection port 203, and between the second connection port 202 and the fourth connection port 204.

[0076] Alternatively, the first connection port 201 can be connected to the second connection port 202, and the third connection port 203 can be connected to the fourth connection port 204.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] The four sub-cavities of the outdoor reversing device 30 are also equipped with four corresponding connection ports. 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 with its second connection port 302, connect the fourth connection port 304 of the outdoor reversing device with its third connection port 303, or connect the first connection port 301 of the outdoor reversing device with its third connection port 303 and connect the fourth connection port 304 of the outdoor reversing device with its second connection port 302.

[0083] 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.

[0084] 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.

[0085] In this embodiment, the switching of the indoor and outdoor switching devices is achieved by using the rotation state of the louver 206 to connect their different connection ports, thereby realizing the switching.

[0086] There are at least two drive units, each corresponding to drive the louvers in one of the two fixed frames.

[0087] The first fixed frame 2051 and the second fixed frame 2052 each include two frame pieces. The louvers of the two frame pieces within the same fixed frame can be driven independently by their respective drive devices, allowing the louvers of the two frame pieces to operate independently. Alternatively, the louvers of the two frame pieces can be driven by the same drive device, in which case the louvers of the two frame pieces will operate simultaneously. In this embodiment, the example of the louvers of the two frame pieces of the first fixed frame 2051 being driven by the same drive device will be used for illustration.

[0088] like Figure 3 As shown, when the louvers on the first fixed frame 2051 are opened and the second fixed frame 2052 is closed, they can connect the third connection port 203 and the fourth connection port 204, and connect the first connection port 201 and the second connection port 202.

[0089] like Figure 4 As shown, when the louvers on the first fixed frame 2051 are closed and the second fixed frame 2052 is open, they can connect the first connection port 201 and the third connection port 203, and the second connection port 202 and the fourth connection port 204.

[0090] Therefore, as Figure 9 As shown, in this embodiment, the control method for the control module to control the indoor reversing device and / or the outdoor reversing device is as follows:

[0091] 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.

[0092] When the matching status is mismatched, the corresponding louvers are controlled to rotate, and the reversing device performs a reversal.

[0093] like Figure 10 As shown, the reversing steps of the control reversing device include: determining the louver that should be activated and its target state, determining the rotation direction and rotation angle of the corresponding drive device according to the target state of the louver, and controlling the drive device to activate.

[0094] The drive unit can be implemented using a motor. The drive unit drives a rotating shaft via a transmission mechanism, which in turn drives the louvers to rotate, thus opening or closing them. For example, when the plane of the louvers is perpendicular to the plane of the fixed frame or forms a certain angle, it is open; when the plane of the louvers is parallel to or nearly parallel to the plane of the fixed frame, it is closed. The opening or closing states corresponding to the rotation direction and angle of the drive unit are pre-set, and can be controlled according to the preset parameters.

[0095] 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.

[0096] To facilitate determining the initial position of the louvers and to enable control in subsequent steps, after receiving a stop signal, the system also includes a step of resetting all the louvers by controlling the drive device to rotate all the louvers to the reset position.

[0097] The reset position can be either the on or off state; no specific restriction is imposed in this embodiment.

[0098] 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.

[0099] The operating modes of the fresh air device in this embodiment include cooling mode and heating mode.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] Cooling Mode

[0105] like Figure 5 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] <Heating Mode>

[0110] 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. For example... Figure 6 As shown, this embodiment uses the example of unchanged refrigerant flow direction for explanation. 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 connects 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] The fresh air system also includes adsorption components. Adsorption components are installed in both the first and second heat exchange chambers to adsorb or release moisture.

[0115] 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.

[0116] The operating modes include dehumidification mode and humidification mode.

[0117] <Dehumidification Mode>

[0118] 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 5 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.

[0119] 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 absorbent element of 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 absorbent element of the condenser is evaporated, released into the air, and carried away to the outside by the airflow directed to the outside.

[0120] When the adsorbent near the first heat exchanger 13 (evaporator) reaches saturation, the adsorbent near the second heat exchanger 14 (condenser) is simultaneously dried. Figure 7 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 near the second heat exchanger 14 before being delivered indoors.

[0121] Humidification Mode

[0122] 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 6 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.

[0123] 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.

[0124] When the adsorbent near 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 act as a condenser, and the adsorbent near the first heat exchanger 13 continues to release moisture into the fresh air.

[0125] 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.

[0126] 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.

[0127] 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: The outer shell has an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet, and an indoor air return outlet. The outer shell also has a first heat exchange chamber and a second heat exchange chamber. The heat exchange assembly includes a first heat exchanger disposed in a first heat exchange chamber and a second heat exchanger disposed in a second heat exchange chamber. A reversing device having a valve chamber and a partition, wherein the valve chamber is partitioned by the partition to form four sub-chambers, which are respectively connected to a fresh air duct, an exhaust air duct, a first heat exchange chamber and a second heat exchange chamber; The control module is configured to control the opening and closing state of the partition, control the heat exchange chamber 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. The adsorption element is provided in both the first heat exchange chamber and the second heat exchange chamber for adsorbing or releasing moisture; the partition includes: Two fixing frames are cross-fixed in the valve cavity; The louvers are multiple in number and are connected to the fixed frame via pivots. The drive device is connected to the rotating shaft through a transmission mechanism. The drive device is controlled by the control module and is used to drive the louvers to rotate to open or close, and to connect or disconnect the two sub-cavities located on both sides of the louvers.

2. The fresh air device according to claim 1, characterized in that, The control method by which the control module controls the commutation of the commutation 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 corresponding louvers are controlled to rotate, and the reversing device performs a reversal.

3. The fresh air device according to claim 2, characterized in that, The reversing steps of the control reversing device include: determining the louver that should be activated and its target state, determining the rotation direction and rotation angle of the corresponding drive device according to the target state of the louver, and controlling the drive device to activate.

4. The fresh air device according to claim 2, characterized in that, 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.

5. The fresh air device according to claim 2, characterized in that, After receiving the shutdown signal, the process also includes a step of controlling the reset of all blades, and controlling the drive device to rotate all blades to the reset position; 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.

6. The fresh air device according to claim 1, characterized in that, The drive device has two parts, which respectively drive the louvers in the two fixed frames.

7. The fresh air device according to claim 1, characterized in that, The reversing device has connection ports that communicate with the four sub-cavities respectively; The reversing device has two parts: an indoor reversing device and an outdoor reversing device. 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.

8. The fresh air device according to any one of claims 1-7, 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.

9. The fresh air device according to any one of claims 1-7, 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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