Fresh air humidity control device

Abstract

The present invention discloses a fresh air humidity control device, comprising: an outer shell, on which an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet and an indoor air return outlet are formed, and a first heat exchange cavity and a second heat exchange cavity are formed in the outer shell; a heat exchange component, comprising a first heat exchanger arranged in the first heat exchange cavity and a second heat exchanger arranged in the second heat exchange cavity; a reversing device, which is respectively connected with the first heat exchange cavity and the second heat exchange cavity; a control module, which is configured to: control the connection state of the reversing device, for controlling the heat exchange cavity connected to the fresh air channel and the exhaust channel, and controlling the flow direction of the refrigerant so that the fresh air channel and the exhaust channel match the operation mode; an adsorbent, the first heat exchanger and the second heat exchanger are both provided with an adsorbent, for adsorbing or releasing moisture. The whole fresh air humidity control device has a simple structure, low manufacturing cost and convenient control.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to a fresh air humidity regulating device. Background Art

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

[0003] Too much or too little humidity will destroy the comfort of the indoor environment. In summer, the heat and humidity ratio of the air-conditioning unit can only change within a certain range, and it is difficult to adapt to changes in the indoor heat and humidity ratio. In winter, air conditioning heating will cause the indoor air to be dry. Long-term operation of the air conditioner will cause rapid evaporation of water in the human body. In severe cases, it will reduce human immunity and cause dizziness and chest tightness. Therefore, it is very important for the air conditioner to be able to adjust temperature and humidity.

[0004] The general dehumidification method is condensation dehumidification. The cold water temperature must be lower than the dew point temperature of the air, which will inevitably lead to a decrease in temperature and cannot achieve both comfort and comfort. In order to increase the lowered gas temperature, the air may even need to be reheated, which results in further waste of energy.

[0005] In addition, during the humidification process, additional humidification water supply pipelines are required. The water supply requires water supply pipelines and control valves, etc., which have a complex structure to humidify the indoor air, making the arrangement of the pipelines 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 the present invention is to provide a fresh air humidity control device to solve the problems existing in the prior art of indoor humidity control devices, such as complex water supply pipelines and control valve structures, which are not conducive to disassembly and assembly, and traditional dehumidification methods require continuous cooling and heating operations, resulting in energy waste.

[0007] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0008] A fresh air humidity control device, comprising:

[0009] An outer shell is formed with an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet and an indoor air return outlet, and a first heat exchange cavity and a second heat exchange cavity are formed in the outer shell;

[0010] A heat exchange assembly, comprising a first heat exchanger disposed in the first heat exchange cavity and a second heat exchanger disposed in the second heat exchange cavity;

[0011] a reversing device, which is communicated with the first heat exchange chamber and the second heat exchange chamber respectively;

[0012] A control module configured to: control the connection state of the reversing device, to control the heat exchange cavity connected to the fresh air channel and the exhaust air channel, and to control the flow direction of the refrigerant so that the fresh air channel and the exhaust air channel match the operation mode;

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

[0014] Adsorbent: The first heat exchanger and the second heat exchanger are both provided with adsorbents for adsorbing or releasing moisture.

[0015] Furthermore, the reversing device has two, including:

[0016] An indoor reversing device, which has four connection ports, which are respectively connected to the indoor return air port, the indoor supply air port, the first heat exchange chamber and the second heat exchange chamber;

[0017] The outdoor reversing device has four connecting ports, which are respectively connected to the outdoor air inlet, the outdoor air outlet, the first heat exchange chamber and the second heat exchange chamber.

[0018] Furthermore, the indoor reversing device and the outdoor reversing device respectively have valve chambers connected to their respective connection ports, and the indoor reversing device and the outdoor reversing device also respectively include:

[0019] A valve plate, which is arranged in the valve cavity;

[0020] A driving device is controlled by the control module and is used to drive the valve plate to rotate.

[0021] Furthermore, the valve cavity is a cylindrical structure, the rotating axis of the valve plate is coaxially arranged with the valve cavity, two connecting ports are respectively opened on the bottom surface at both ends of the valve cavity, the projections of all connecting ports toward the bottom surface of the valve cavity are respectively located in different quadrants, and the quadrants where the projections of two connecting ports located on the same bottom surface are located are not adjacent.

[0022] Furthermore, the control method of the control module controlling the indoor reversing device and / or the outdoor reversing device is:

[0023] Get the running mode;

[0024] Determine the heat exchange chamber connected to the fresh air channel and / or the exhaust air channel, obtain the cooling and heating status of each heat exchange chamber, and judge the matching status of the cooling and heating status of each heat exchange chamber with the operation mode;

[0025] When the matching state is mismatched, the indoor reversing device and / or the outdoor reversing device is controlled to be reversed, or the refrigerant is controlled to be reversed.

[0026] Further, the operation mode includes a dehumidification mode and a humidification mode;

[0027] In the dehumidification mode, when it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, the matching state is matched, otherwise it is not matched;

[0028] In the humidification mode, when it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is a condenser, the matching state is matched, otherwise it is not matched.

[0029] Furthermore, the method for obtaining the operating mode includes user setting and automatic determination, and the method for automatically determining the operating mode is:

[0030] The outdoor temperature Tout, indoor temperature Tin and indoor relative humidity are obtained respectively. When Tout ≥ t1, Tin-Tout ≥ t2 and indoor relative humidity > a1, it is determined that the current operation mode is the dehumidification mode;

[0031] When Tout≤t3, Tin≤t4 and the indoor relative humidity <a2, the current operation mode is judged to be the humidification mode;

[0032] Among them, 0<t2<t3<t4<t1, 0<a2<a1<1.

[0033] Furthermore, the method for determining the cooling and heating state of the heat exchanger in the heat exchange cavity connected to the fresh air channel is as follows:

[0034] The indoor supply air temperature Tsa and the outdoor exhaust air temperature Tea are obtained. When Tsa < Tea, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser.

[0035] or,

[0036] The indoor supply air temperature Tsa and the outdoor inlet air temperature Toa are obtained. When Tsa < Toa, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser.

[0037] or,

[0038] Obtain the outdoor exhaust air temperature Tea and the indoor return air temperature Tra. When Tea < Tra, it is determined that the heat exchanger in the heat exchange cavity connected to the exhaust channel is an evaporator, otherwise, it is a condenser.

[0039] or,

[0040] The indoor supply air humidity dsa and the outdoor inlet air humidity doa are obtained. When dsa < doa, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser.

[0041] or,

[0042] The indoor supply air humidity dsa and the indoor return air humidity dra are obtained. When dsa < dra, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser.

[0043] or,

[0044] The outdoor exhaust air humidity dea and the indoor return air humidity dra are obtained. When dea<dra, it is determined that the heat exchanger in the heat exchange cavity connected to the exhaust passage is an evaporator, otherwise, it is a condenser.

[0045] Furthermore, the control module also includes:

[0046] In the dehumidification mode, a step of determining the adsorption capacity of the adsorbent in the fresh air passage, and when the adsorption capacity of the adsorbent decays, controlling the indoor reversing device and the outdoor reversing device to reverse, and controlling the refrigerant to reverse;

[0047] In the humidification mode, the step of judging the release capacity of the adsorbent in the fresh air passage is performed. When the release capacity of the adsorbent decays, the indoor reversing device and the outdoor reversing device are controlled to be reversed, and the refrigerant is controlled to be reversed.

[0048] Furthermore, the method for determining the adsorption capacity of the adsorption member is as follows:

[0049] Continuously obtain the humidity content of the indoor air supply, and when the humidity content of the indoor air supply is greater than the humidity content at the previous moment, it is determined that the adsorption capacity of the adsorption element is attenuated;

[0050] or,

[0051] Obtain the cumulative running time T of the reversing device since the last reversal. When T is greater than a set threshold, it is determined that the adsorption capacity of the adsorption component is attenuated.

[0052] The method for judging the release capacity of the adsorbent is:

[0053] Continuously obtain the humidity content of the indoor air supply, and when the humidity content of the indoor air supply is less than the humidity content at the previous moment, it is determined that the release capacity of the adsorption component is attenuated;

[0054] or,

[0055] The cumulative running time T of the reversing device since the last reversal is obtained. When T is greater than a set threshold, it is determined that the release capacity of the adsorption component is attenuated.

[0056] Compared with the prior art, the advantages and positive effects of the present invention are:

[0057] The fresh air humidity control device involved in the present application is provided with a switching element in the first switching chamber and the second switching chamber respectively, and a conversion valve is provided in the switching element for cutting off or connecting different pipelines. A first heat exchanger and a second heat exchanger are formed in the heat exchange chamber, and adsorbents are provided on the first heat exchanger and the second heat exchanger for adsorbing or releasing water vapor. In the dehumidification process in summer, the gas transported to the room condenses water after passing through the heat exchanger as an evaporator, and is absorbed by the adsorbent on the heat exchanger; the other heat exchanger acts as a condenser, condenses and releases heat, and the water on the adsorbent on the heat exchanger is transported to the outside with the airflow, so that the adsorbent on the heat exchanger is dried;

[0058] In the summer dehumidification state, when the adsorbent on the heat exchanger used for adsorbing moisture reaches saturation; or in the winter humidification state, the adsorbent on the heat exchanger used for releasing moisture has a reduced ability to release moisture, the four-way valve connected to the heat exchanger is switched so that the heat exchanger that originally served as an evaporator serves as a condenser, and the heat exchanger that originally served as a condenser serves as an evaporator. At the same time, the reversing valve is switched so that the heat exchanger through which the airflow to the indoor and outdoor spaces passes is changed, thereby reusing the adsorbents on the surfaces of the first heat exchanger and the second heat exchanger to repeat the dehumidification and humidification processes.

[0059] The whole structure is simple, the manufacturing cost is low, and the control is convenient. The adsorption function in the adsorption element is used to achieve the effect of dehumidification in summer and moisturizing in winter, which effectively solves the problem that the traditional humidity control device requires a water supply system to achieve moisturizing in winter.

[0060] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0062] Figure 1 It is a structural schematic diagram of an embodiment of the fresh air humidity control device proposed by the present invention;

[0063] Figure 2 yes Figure 1 According to the schematic diagram of flipping 90° in direction A;

[0064] Figure 3 yes Figure 1 A schematic diagram of the structure of the reversing device in the middle chamber;

[0065] Figure 4 yes Figure 1A schematic diagram of one of the reversing states of the reversing device in the middle chamber;

[0066] Figure 5 yes Figure 1 Schematic diagram of another commutation state of the commutation device in the middle chamber;

[0067] Figure 6 1 is a schematic diagram of system connection in a dehumidification mode in an embodiment of the fresh air humidity control device proposed by the present invention;

[0068] Figure 7 yes Figure 6 Schematic diagram of system connection after dehumidification mode reversal;

[0069] Figure 8 1. is a schematic diagram of system connection in a humidification mode in one embodiment of the fresh air humidification device proposed by the present invention;

[0070] Fig. 9 yes Figure 8 Schematic diagram of system connection after humidification mode switching;

[0071] Fig.10 This is a schematic diagram of the refrigerant system of the fresh air humidity control device proposed by the present invention;

[0072] Fig.11 It is a flow chart of an embodiment of a control method of a reversing device of a fresh air humidity control device proposed by the present invention;

[0073] Fig.12 It is a flow chart of an embodiment of a control method of a reversing device in a dehumidification mode of a fresh air humidity control device proposed by the present invention;

[0074] Fig.13 It is a flow chart of an embodiment of a control method of a reversing device in a humidification mode of a fresh air humidification device proposed by the present invention;

[0075] Fig.14 It is a flow chart of an embodiment of the method for judging the operation mode of the fresh air humidity control device proposed by the present invention;

[0076] Fig.15 It is a flow chart of an embodiment of the fresh air humidity control device proposed by the present invention for judging the cooling and heating state of the heat exchanger;

[0077] Fig.16 This is a flow chart of another embodiment of the fresh air humidity control device proposed by the present invention for judging the cooling and heating state of the heat exchanger. DETAILED DESCRIPTION

[0078] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0079] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0080] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0081] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0082] In the present invention, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0083] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0084] refer to Figure 1-5 , a fresh air humidity control device is proposed, 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 air return outlet RA are formed, and a first heat exchange chamber 11 and a second heat exchange chamber 12 are formed in the outer shell 10.

[0085] 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 .

[0086] The first heat exchanger 13 and the second heat exchanger 14 are respectively provided with adsorbents (not shown in the figure) for adsorbing or releasing moisture.

[0087] The fresh air humidity control device also includes a reversing device, which has four connection ports, two of which are respectively connected to the first heat exchange chamber 11 and the second heat exchange chamber 12. The fresh air channel and the exhaust air channel are respectively connected to the first heat exchange chamber 11 and the second heat exchange chamber 12 through the reversing device.

[0088] The two ends of the fresh air duct are connected to the outdoor air inlet OA and the indoor air supply outlet SA respectively, and the two ends of the exhaust air duct are connected to the indoor return air outlet RA and the outdoor exhaust outlet EA respectively.

[0089] The control module is configured to control the connectivity state of the reversing device, to control the heat exchange chamber connected to the fresh air channel and the exhaust air channel, and to control the flow direction of the refrigerant so that the fresh air channel and the exhaust air channel match the operation mode.

[0090] like Fig.10 As shown, the heat exchange components are 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 passage to realize the transportation of the refrigerant.

[0091] The control module controls the reversal of the four-way valve 50 and the flow direction of the refrigerant to realize the cooling or heating function of the first heat exchanger 13. 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.

[0092] The reversing device may have one, which may be connected to the indoor return air outlet RA and the indoor supply air outlet SA, or to the outdoor air inlet OA and the outdoor air outlet EA.

[0093] The present embodiment has two reversing devices, namely an indoor reversing device 20 and an outdoor reversing device 30. The indoor reversing device 20 has four connecting ports, which are respectively connected to the indoor return air port RA, the indoor supply air port SA, the first heat exchange chamber 11 and the second heat exchange chamber 12.

[0094] The outdoor reversing device 30 also has four connection ports, which 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.

[0095] The control module controls the communication ports of the indoor reversing device 20 and the outdoor reversing device 30 to be reversed, so that the fresh air channel is connected to one of the first heat exchange chamber 11 and the second heat exchange chamber 12, and the exhaust air channel is connected to the other of the first heat exchange chamber 11 and the second heat exchange chamber 12. A fresh air fan for sucking outdoor air into the room is provided in the fresh air channel, and an exhaust air fan for exhausting indoor air to the outside is provided in the exhaust air channel.

[0096] Figure 2 for Figure 1 According to the schematic diagram of rotating 90° in direction A, combined with Figure 1 , Figure 2 As shown, in this embodiment, an indoor reversing device 20 and an outdoor reversing device 30 are arranged at both ends of the first heat exchange chamber 11 and the second heat exchange chamber 12. The four connecting ports of the indoor reversing device 20 are respectively connected to the indoor return air port RA, the indoor air supply port SA, the first heat exchange chamber 11 and the second heat exchange chamber 12. The four connecting 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. A first heat exchanger 13 is arranged in the first heat exchange chamber 11, and a second heat exchanger 14 is arranged in the second heat exchange chamber 12.

[0097] The refrigeration system can achieve the interchange of the cooling and heating functions of the two heat exchange chambers by changing the flow direction of the refrigerant, and at the same time cooperate with the indoor reversing device and the outdoor reversing device to control the connectivity between their respective connection ports, thereby realizing the switching of the heat exchange chamber connected to the fresh air channel and the exhaust channel, but the air conditioning operation mode remains unchanged. It is particularly suitable for fresh air humidification devices that need to cooperate with switching the fresh air channel and the exhaust channel in order to achieve dehumidification or humidification functions.

[0098] The indoor reversing device 20 and the outdoor reversing device 30 respectively have valve chambers connected to their respective connection ports. The indoor reversing device 20 and the outdoor reversing device 30 also respectively include valve plates and driving devices. In this embodiment, the indoor reversing device 20 is taken as an example for description.

[0099] like Figure 3-Figure 5 As shown, the four connection ports of the indoor reversing device 20 are respectively a first connection port 201 , a second connection port 202 , a third connection port 203 and a fourth connection port 204 , and the four connection ports are respectively connected to the valve chamber of the indoor reversing device 20 .

[0100] A valve plate 205 is disposed in the valve chamber of the indoor reversing device 20 , and a driving device (not shown in the figure) is controlled by the control module to drive the valve plate 205 to rotate.

[0101] The rotation axis of the valve plate 205 is located at the center of the valve plate 205. When the valve plate 205 rotates to different positions, the valve cavity can be separated into two independent and unconnected spaces, such as Figure 4 As shown, when the valve plate 205 rotates to position I, the first connection port 201 and the third connection port 203 are connected to the same space of the valve cavity, and the second connection port 202 and the fourth connection port 204 are connected to another space of the valve cavity.

[0102] Or, if Figure 5 As shown, when the valve plate 205 rotates to position II, the first connection port 201 and the second connection port 202 are connected to the same space, and the third connection port 203 and the fourth connection port 204 are connected to another space. Two connection ports connected to the same space can be connected to each other.

[0103] In this embodiment, the first connection port 201 of the indoor reversing device 20 is connected to the indoor return air port RA, the fourth connection port 204 of the indoor reversing device is connected to the indoor supply air port 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 state 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.

[0104] The first connection port 301 of the outdoor reversing device 30 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 of the first heat exchange chamber 11 and the second heat exchange chamber 12. The control module controls the connection state 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.

[0105] A third partition is provided between the first heat exchange chamber 11 and the second heat exchange chamber 12 . The third partition may be installed in a horizontal direction, and the first heat exchanger 13 and the second heat exchanger 14 are arranged up and down.

[0106] Of course, the installation direction of the third partition is not limited to the horizontal setting, and 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 respectively located on both sides of the third partition.

[0107] The positions of the four connection ports on the indoor reversing device 20 can be determined according to the internal space of the outer shell 10. The four connection ports can be oriented in four different directions, or some of the connection ports can be oriented in the same direction. Figure 3-Figure 5 As shown, in this embodiment, the valve cavity is a cylindrical structure, the rotating shaft of the valve plate 205 is coaxially arranged with the valve cavity, two connection ports are respectively provided on the bottom surface of both ends of the valve cavity, and the projections of all the connection ports toward the bottom surface of the valve cavity are respectively located in four different quadrants, and the quadrants where the projections of the two connection ports at the same end are located are not adjacent. That is, the first connection port 201 and the fourth connection port 204 are located on the bottom surface of the same end of the valve cavity, and the second connection port 202 and the third connection port are located on the bottom surface of the other end of the valve cavity.

[0108] The above is a structural description of the indoor reversing device 20. 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.

[0109] Generally, when the fresh air humidification device is powered on and turned on, or when the user manually controls the switching during operation, or when the system automatically determines that reversal is required, the indoor reversing device and / or the outdoor reversing device are controlled.

[0110] In this embodiment, the switching of the indoor switching device and the outdoor switching device utilizes the change in the position of the valve plate 205 to connect their different connection ports, thereby achieving switching. Fig.11 As shown, in this embodiment, the control method of the control module controlling the indoor reversing device and / or the outdoor reversing device is:

[0111] Get the running mode;

[0112] Determine the heat exchange chamber connected to the fresh air channel and / or the exhaust air channel, obtain the cooling and heating status of each heat exchange chamber, and judge the matching status of the cooling and heating status of each heat exchange chamber with the operation mode;

[0113] When the matching state is mismatched, the indoor reversing device and / or the outdoor reversing device are controlled to be reversed. When reversing, according to the operation mode of the system, one of the indoor reversing device and the outdoor reversing device can be controlled to be reversed separately, or the indoor reversing device and the outdoor reversing device can be controlled to be reversed at the same time.

[0114] The refrigerant reversing can also be controlled, and the matching status can also be adjusted.

[0115] In this embodiment, the operation modes include a dehumidification mode and a humidification mode;

[0116] In dehumidification mode, Fig.12 As shown, when it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, the matching state is matched, otherwise it is not matched. When the refrigerant flows through the evaporator, it absorbs the heat of the air around the evaporator. The air passing through the evaporator is cooled, and the moisture condenses into water droplets and is adsorbed by the adsorption element of the evaporator, achieving the dehumidification effect.

[0117] The adsorbent is arranged inside the heat exchanger or coated on the surface of the heat exchanger in the form of blocks, sheets, mesh-wrapped particles, etc.

[0118] In humidification mode, Fig.13 As shown, when it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is a condenser, the matching state is matched, otherwise it is not matched. When the refrigerant flows through the condenser, it releases heat to the air around the condenser, and the air passing through the condenser is heated. At the same time, the moisture in the adsorbent of the condenser evaporates into the air and is carried away by the airflow passing through, achieving a humidification effect.

[0119] The methods for obtaining the operating mode include user setting and automatic judgment. The user can set the operating mode through the wired controller or remote control. The system can also automatically determine the required operating mode by obtaining environmental parameters and control the operation.

[0120] The method for automatically determining the operating mode is:

[0121] like Fig.14As shown, the outdoor temperature Tout, the indoor temperature Tin and the indoor relative humidity are obtained respectively. When Tout≥t1, Tin-Tout≥t2 and the indoor relative humidity>a1, it is determined that the current operation mode is the dehumidification mode.

[0122] When Tout≤t3, Tin≤t4 and the indoor relative humidity <a2, it is determined that the current operation mode is the humidification mode.

[0123] Among them, 0<t2<t3<t4<t1, 0<a2<a1<1.

[0124] like Fig.15 As shown, there are many methods for judging the cooling and heating state of the heat exchanger in the heat exchange cavity connected to the fresh air channel, which can be judged according to any two or more combinations of the indoor supply air temperature Tsa, the outdoor exhaust air temperature Tea, the outdoor inlet air temperature Toa and the indoor return air temperature Tra, including:

[0125] (1) Obtain the indoor supply air temperature Tsa and the outdoor exhaust air temperature Tea. When Tsa < Tea, the heat exchanger in the heat exchange cavity connected to the fresh air channel is judged to be an evaporator, otherwise, it is a condenser. At this time, it is necessary to set temperature sensors at the indoor supply air outlet SA and the outdoor exhaust air outlet EA respectively.

[0126] (2) Obtain the indoor air supply temperature Tsa and the outdoor air inlet temperature Toa. When Tsa < Toa, the heat exchanger in the heat exchange cavity connected to the fresh air channel is judged to be an evaporator, otherwise, it is a condenser. At this time, temperature sensors need to be set at the indoor air supply port SA and the outdoor air inlet OA.

[0127] (3) Obtain the outdoor exhaust air temperature Tea and the indoor return air temperature Tra. When Tea < Tra, the heat exchanger in the heat exchange cavity connected to the exhaust channel is judged to be an evaporator, otherwise, it is a condenser. At this time, temperature sensors need to be set at the outdoor exhaust outlet EA and the outdoor air inlet OA.

[0128] The cooling and heating state of the heat exchanger in the heat exchange cavity connected to the fresh air channel can also be determined based on any two or more combinations of the indoor supply air humidity content dsa, the outdoor intake air humidity content doa, the indoor return air humidity content dra, and the outdoor exhaust air humidity content dea, including:

[0129] (1) Obtain the indoor supply air humidity dsa and the outdoor inlet air humidity doa. When dsa < doa, the heat exchanger in the heat exchange cavity connected to the fresh air channel is judged to be an evaporator, otherwise, it is a condenser. At this time, humidity sensors need to be installed at the indoor supply air outlet SA and the outdoor air inlet OA.

[0130] (2) Obtain the indoor supply air humidity content dsa and the indoor return air humidity content dra. When dsa < dra, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator; otherwise, it is a condenser. At this time, humidity sensors need to be installed at the indoor supply air outlet SA and the indoor return air outlet RA.

[0131] (3) Obtain the outdoor exhaust air humidity dea and the indoor return air humidity dra. When dea < dra, it is determined that the heat exchanger in the heat exchange cavity connected to the exhaust channel is an evaporator, otherwise, it is a condenser. At this time, humidity sensors need to be installed at the outdoor exhaust outlet EA and the indoor return air outlet RA.

[0132] like Fig.16 As shown, the indoor supply air humidity dsa and the outdoor intake air humidity doa are obtained. When dsa<doa, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser.

[0133] Whether in the humidification or dehumidification process, if the exhaust passage passes through a heat exchange chamber for a long time, the adsorbent in the heat exchange chamber will become saturated (dehumidification process) or the moisture will be released completely (humidification process). Therefore, the control module in this solution also includes:

[0134] In the dehumidification mode, the step of judging the adsorption capacity of the adsorbent in the fresh air passage is performed. When the adsorption capacity of the adsorbent decays, the indoor reversing device and the outdoor reversing device are controlled to be reversed, and the refrigerant is controlled to be reversed.

[0135] In the humidification mode, the step of judging the release capacity of the adsorbent in the fresh air passage is performed. When the release capacity of the adsorbent decays, the indoor reversing device and the outdoor reversing device are controlled to be reversed, and the refrigerant is controlled to be reversed.

[0136] In the dehumidification mode, the adsorption capacity of the adsorbent is determined as follows:

[0137] The humidity content of the indoor air supply is continuously obtained. When the humidity content of the indoor air supply is greater than the humidity content at the previous moment, it is judged that the adsorption capacity of the adsorbent is attenuated. If the humidity content of the indoor air supply begins to increase at different moments, it is judged that the adsorption capacity of the adsorbent is attenuated. Since the adsorbent of the other heat exchange chamber is releasing moisture, the reversing device can be controlled to reverse the fresh air channel and connect it to the other heat exchange chamber to ensure the continuous dehumidification capacity of the system.

[0138] In order to prevent the humidity detection device from malfunctioning and causing inaccurate moisture content measurement, the present solution also includes obtaining the cumulative running time T of the reversing device since the last reversal. When T is greater than a set threshold, it is determined that the adsorption capacity of the adsorbent is attenuated. When any of the above conditions is met, it is determined that the adsorption capacity of the adsorbent is attenuated, and reversing control is performed.

[0139] In the humidification mode, the release capacity of the adsorbent is determined as follows:

[0140] The humidity content of the indoor air supply is continuously obtained. When the humidity content of the indoor air supply is less than the humidity content at the previous moment, it is judged that the release capacity of the adsorbent is attenuated. If the humidity content of the indoor air supply begins to decrease at different moments, it is judged that the release capacity of the adsorbent is attenuated. Since the adsorbent of the other heat exchange chamber is adsorbing moisture, the reversing device can be controlled to reverse the fresh air channel and connect it with the other heat exchange chamber to ensure the continuous humidification capacity of the system.

[0141] In order to prevent the humidity detection device from malfunctioning and causing inaccurate moisture content measurement, the present solution also includes obtaining the cumulative running time T of the reversing device since the last reversal. When T is greater than a set threshold, it is determined that the release capacity of the adsorbent is attenuated. When any of the above conditions is met, it is determined that the adsorption capacity of the adsorbent is attenuated, and reversing control is performed.

[0142] 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, and the second connection port 202 of the indoor reversing device is connected to the second heat exchange chamber 12. The following describes the two operation modes in detail.

[0143] <Dehumidification Mode>

[0144] In dehumidification mode, the fresh air channel is connected to the heat exchange chamber where the evaporator is located, and the exhaust air channel is connected to the heat exchange chamber where the condenser is located. Figure 6 As shown, 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. The first heat exchanger 13 is used as an evaporator and the second heat exchanger 14 is used as a condenser for explanation.

[0145] 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 of the evaporator, and the wind entering from the outside is dried and transported indoors. The refrigerant in the second heat exchanger 14 (condenser) releases heat to the surrounding air, and the moisture in the adsorbent of the condenser is evaporated, released into the air, and carried out to the outside by the airflow discharged to the outside.

[0146] When the adsorbent of the first heat exchanger 13 (evaporator) reaches saturation, the adsorbent of the second heat exchanger 14 (condenser) is dried at the same time. Figure 7As shown, by controlling the reversing device to reverse, the fresh air channel passes through the second heat exchanger cavity 12, and the exhaust air channel passes through the first heat exchanger cavity 11, and the refrigerant is reversed at the same time, so that the second heat exchanger 14 is an evaporator and the first heat exchanger 13 is a condenser. The air entering from the outside is continuously dehumidified and dried by the adsorption element of the second heat exchanger 14 and then transported to the room.

[0147] <Humidification Mode>

[0148] In the humidification mode, the fresh air channel is connected to the heat exchange chamber where the condenser is located, and the exhaust air channel is connected to the heat exchange chamber where the evaporator is located. Figure 8 As shown, the first heat exchanger 13 is used as an evaporator, and the second heat exchanger 14 is used as a condenser. The first connection port 301 of the outdoor reversing device is controlled to be connected with its third connection port 303, and the second connection port 302 of the outdoor reversing device is controlled to be connected with its fourth connection port 304. The third connection port 303 of the outdoor reversing device is connected with the first heat exchange cavity 11 where the first heat exchanger 13 is located, and the second connection port 302 of the outdoor reversing device is connected with the second heat exchange cavity 12 where the second heat exchanger 14 is located.

[0149] The first connection port 201 of the indoor reversing device is connected to its third connection port 203, and the second connection port 202 of the indoor reversing device is connected 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.

[0150] When the adsorbent of the second heat exchanger 14 (condenser) is dried, it loses the ability to release moisture. At this time, the reversing device is controlled to reverse, such as Fig. 9 As shown, the fresh air channel is connected to the first heat exchange chamber 11, and at the same time the first heat exchanger 13 is switched to serve as a condenser, and the adsorbent of the first heat exchanger 13 continues to release moisture into the fresh air.

[0151] The control module also includes obtaining the adsorption capacity of the adsorbent or the humidity of the fresh air input into the room. In the dehumidification mode, when the adsorption capacity of the adsorbent of the evaporator decreases or the humidity of the fresh air input into the room is greater than the set value; or, in the humidification mode, when the release capacity of the adsorbent of the condenser 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 changed, and at the same time, the reversing of the indoor reversing device and the outdoor reversing device is controlled.

[0152] The adsorption capacity or release capacity of the adsorbent can be determined by the time that the fresh air channel continuously passes through the same heat exchange cavity, and the time value can be determined and set in the laboratory. The longer the fresh air channel continuously passes through the same heat exchange cavity, the lower the adsorption capacity or release capacity of the adsorbent.

[0153] The method of controlling the reversing device to reverse is: determining the target position of the valve plate, determining the rotation direction and rotation angle of the driving device according to the target position of the valve plate, and controlling the action of the driving device to drive the valve plate 205 to rotate to the target position.

[0154] The rotation direction includes clockwise rotation and counterclockwise rotation. The rotation direction and rotation angle can be determined according to the specific design structure of the reversing device. For a reversing device limited by space, it can only reciprocate within a certain angle range to achieve the switching between position I and position II. The valve plate 205 of this solution can rotate 360°.

[0155] After the valve plate 205 reaches the target position, the valve plate 205 can also be limited to prevent the valve plate 205 from deviating from the target position under the action of wind pressure, thereby losing the blocking function. The limitation can be achieved by clamping the driving device.

[0156] In the step of controlling the reversing device to change direction, before the control driving device is actuated, it also includes judging whether the valve plate 205 is limited at the current position. If it is limited, it is necessary to release the limit first, and then control the driving device to act.

[0157] The method for determining the current position of the valve plate 205 further includes: querying the previous rotation direction and rotation angle of the valve plate 205 recorded in the memory, and determining the current position of the valve plate 205 accordingly.

[0158] For the solution in which the valve plate 205 can rotate 360°, after the machine is turned on, the last rotation angle (for example, θ1) recorded in the memory is first queried, indicating that the valve plate 205 is at position II at this time.

[0159] Then, it is determined whether the switching device needs to be switched according to the operation mode. If not, the valve plate 205 does not move; if yes, the control module issues a switching instruction.

[0160] After receiving the reversing command, the limit is released, the driving module is started, and the valve plate 205 is driven to rotate counterclockwise by a preset angle, reaches position I and starts the limit, completing a channel switching.

[0161] When a stop signal is received, the rotation angle before the stop is recorded (for example, θ1).

[0162] Of course, the switching of the valve plate 205 between position I and position II is not limited to the above-mentioned rotation method, and the valve plate 205 can also be rotated in a clockwise direction to achieve rotation to the target position.

[0163] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A fresh air humidity control device, characterized in that: include: An outer shell is formed with an outdoor air inlet, an outdoor air outlet, an indoor air supply outlet and an indoor air return outlet, and 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 disposed in the first heat exchange cavity and a second heat exchanger disposed in the second heat exchange cavity; a reversing device, which is communicated with the first heat exchange chamber and the second heat exchange chamber respectively; A control module configured to: control the connection state of the reversing device, to control the heat exchange cavity connected to the fresh air channel and the exhaust air channel, and to control the flow direction of the refrigerant so that the fresh air channel and the exhaust air channel match the operation mode; The two ends of the fresh air channel are connected to the outdoor air inlet and the indoor air supply outlet respectively, and the two ends of the exhaust channel are connected to the indoor return air outlet and the outdoor exhaust outlet respectively; Adsorbent, the first heat exchanger and the second heat exchanger are both provided with an adsorbent for adsorbing or releasing moisture; The reversing device has two, including: An indoor reversing device, which has four connection ports, which are respectively connected to the indoor return air port, the indoor supply air port, the first heat exchange chamber and the second heat exchange chamber; An outdoor reversing device, which has four connection ports, which are respectively connected to the outdoor air inlet, the outdoor air outlet, the first heat exchange chamber and the second heat exchange chamber; The control method of the control module controlling the indoor reversing device and / or the outdoor reversing device is: Get the running mode; Determine the heat exchange chamber connected to the fresh air channel and / or the exhaust air channel, obtain the cooling and heating status of each heat exchange chamber, and judge the matching status of the cooling and heating status of each heat exchange chamber with the operation mode; When the matching state is mismatched, controlling the indoor reversing device and / or the outdoor reversing device to reverse, or controlling the refrigerant to reverse; The operation modes include a dehumidification mode and a humidification mode; The methods for obtaining the operating mode include user setting and automatic judgment. The method for automatically judging the operating mode is: The outdoor temperature Tout, indoor temperature Tin and indoor relative humidity are obtained respectively. When Tout ≥ t1, Tin-Tout ≥ t2 and indoor relative humidity > a1, it is determined that the current operation mode is the dehumidification mode; When Tout≤t3, Tin≤t4 and the indoor relative humidity <a2, the current operation mode is judged to be the humidification mode; Among them, 0<t2<t3<t4<t1, 0<a2<a1<1.

2. The fresh air humidity control device according to claim 1, characterized in that: The indoor reversing device and the outdoor reversing device respectively have valve chambers connected to their respective connection ports, and the indoor reversing device and the outdoor reversing device also respectively include: A valve plate, which is arranged in the valve cavity; A driving device is controlled by the control module and is used to drive the valve plate to rotate.

3. The fresh air humidity control device according to claim 2, characterized in that: The valve cavity is a cylindrical structure, the rotating axis of the valve plate is coaxially arranged with the valve cavity, two connecting ports are respectively opened on the bottom surface at both ends of the valve cavity, the projections of all connecting ports toward the bottom surface of the valve cavity are respectively located in different quadrants, and the quadrants where the projections of two connecting ports located on the same bottom surface are located are not adjacent.

4. The fresh air humidity control device according to claim 1, characterized in that: In the dehumidification mode, when it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, the matching state is matched, otherwise it is not matched; In the humidification mode, when it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is a condenser, the matching state is matched, otherwise it is not matched.

5. The fresh air humidity control device according to claim 4, characterized in that: The method for determining the cooling and heating state of the heat exchanger in the heat exchange cavity connected to the fresh air channel is: The indoor supply air temperature Tsa and the outdoor exhaust air temperature Tea are obtained. When Tsa < Tea, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser. or, The indoor supply air temperature Tsa and the outdoor inlet air temperature Toa are obtained. When Tsa < Toa, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser. or, Obtain the outdoor exhaust air temperature Tea and the indoor return air temperature Tra. When Tea < Tra, it is determined that the heat exchanger in the heat exchange cavity connected to the exhaust channel is an evaporator, otherwise, it is a condenser. or, The indoor supply air humidity dsa and the outdoor inlet air humidity doa are obtained. When dsa < doa, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser. or, The indoor supply air humidity dsa and the indoor return air humidity dra are obtained. When dsa < dra, it is determined that the heat exchanger in the heat exchange cavity connected to the fresh air channel is an evaporator, otherwise, it is a condenser. or, The outdoor exhaust air humidity dea and the indoor return air humidity dra are obtained. When dea<dra, it is determined that the heat exchanger in the heat exchange cavity connected to the exhaust passage is an evaporator, otherwise, it is a condenser.

6. The fresh air humidity control device according to claim 4, characterized in that: Also includes: The control module also includes: In the dehumidification mode, a step of determining the adsorption capacity of the adsorbent in the fresh air passage, and when the adsorption capacity of the adsorbent decays, controlling the indoor reversing device and the outdoor reversing device to reverse, and controlling the refrigerant to reverse; In the humidification mode, the step of judging the release capacity of the adsorbent in the fresh air passage is performed. When the release capacity of the adsorbent decays, the indoor reversing device and the outdoor reversing device are controlled to be reversed, and the refrigerant is controlled to be reversed.

7. The fresh air humidity control device according to claim 6, characterized in that: The method for judging the adsorption capacity of the adsorption part is: Continuously obtain the humidity content of the indoor air supply, and when the humidity content of the indoor air supply is greater than the humidity content at the previous moment, it is determined that the adsorption capacity of the adsorption element is attenuated; or, Obtain the cumulative running time T of the reversing device since the last reversal. When T is greater than a set threshold, it is determined that the adsorption capacity of the adsorption component is attenuated. The method for judging the release capacity of the adsorbent is: Continuously obtain the humidity content of the indoor air supply, and when the humidity content of the indoor air supply is less than the humidity content at the previous moment, it is determined that the release capacity of the adsorption component is attenuated; or, The cumulative running time T of the reversing device since the last reversal is obtained. When T is greater than a set threshold, it is determined that the release capacity of the adsorption component is attenuated.

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