Fresh air humidity control device

Abstract

The present invention discloses a fresh air humidity control device, including an outer shell, a switching component, a heat exchange component and an adsorbent component. The switching component includes a switching body, an air inlet pipe, an air outlet pipe, a first heat exchange pipe and a second heat exchange pipe connected to the switching body. A switching valve is arranged in the switching body. The heat exchange component includes a first heat exchanger and a second heat exchanger with adsorbents formed on the surfaces. During dehumidification in summer or humidification in winter, after the airflow passes through the heat exchanger serving as an evaporator, moisture is absorbed by the adsorbent on the surface thereof. After passing through the heat exchanger serving as a condenser, moisture in the heat exchanger evaporates with the airflow. After the reversing valve is reversed, the heat exchanger through which the airflow flowing to indoor and outdoor spaces passes is changed. The whole fresh air humidity control device has a simple structure, low manufacturing cost and convenient control. The adsorption function in the adsorbent component is utilized to achieve the effects of dehumidification in summer and moisturizing in winter, thereby effectively solving the problem that a water supply system is required to achieve moisturizing in winter in traditional humidity control devices.

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 cavity is formed in the outer shell, and the cavity is divided into a first switching cavity, a heat exchange cavity and a second switching cavity by the first partition and the second partition;

[0010] a switching member, which is formed in the first switching cavity and the second switching cavity respectively, the switching member comprises a switching body, an air inlet pipe, an air outlet pipe, a first heat exchange pipe and a second heat exchange pipe connected to the switching body, a flow cavity is formed in the switching body, and a conversion valve is arranged in the flow cavity for realizing the connection of different pipelines;

[0011] a heat exchange assembly formed in the heat exchange cavity, comprising a first heat exchanger and a second heat exchanger, a third partition being provided between the first heat exchanger and the second heat exchanger, and the first heat exchange tube and the second heat exchange tube being connected to the first heat exchanger and the second heat exchanger respectively;

[0012] Adsorbent: The first heat exchanger and the second heat exchanger are both formed with adsorbents for adsorbing or releasing moisture.

[0013] In some embodiments of the present application, the switching element includes a first switching element and a second switching element, the first switching element is located in the first switching cavity, and the second switching element is located in the second switching cavity.

[0014] In some embodiments of the present application, the third partition is horizontally arranged in the heat exchange cavity.

[0015] In some embodiments of the present application, the first heat exchange tube and the second heat exchange tube are located on the same side of the switching body.

[0016] In some embodiments of the present application, the inner wall of the circulation cavity is formed with two arc surfaces arranged opposite to each other, and the two ends of the conversion valve rotate along the arc surfaces to achieve communication between the first heat exchange tube and the air inlet pipe or the air outlet pipe.

[0017] In some embodiments of the present application, two connecting holes are respectively formed on the first partition and the second partition, and the first heat exchange tube and the second heat exchange tube pass through the through holes to be connected to the first heat exchanger and the second heat exchanger respectively.

[0018] In some embodiments of the present application, a humidity detection device is provided at the indoor air supply outlet to detect the humidity of the fresh air input into the room.

[0019] In some embodiments of the present application, the first heat exchanger and the second heat exchanger are both connected to the compressor via a four-way valve.

[0020] In some embodiments of the present application, an electronic expansion valve is further provided between the first heat exchanger and the second heat exchanger.

[0021] In some embodiments of the present application,

[0022] Also included is a control unit configured as follows:

[0023] In the summer dehumidification state, when the adsorption effect of the adsorbent on the first heat exchanger or the second heat exchanger reaches saturation; or,

[0024] In the winter dehumidification state, the desorption process of the adsorbent on the first heat exchanger or the second heat exchanger ends, and the control unit controls the four-way valve and the conversion valve to switch directions.

[0025] Compared with the prior art, the advantages and positive effects of the present invention are:

[0026] 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;

[0027] 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.

[0028] 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 effects 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.

[0029] 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

[0030] 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 paying creative work.

[0031] Figure 1 It is a structural schematic diagram of an embodiment of the fresh air humidity control device proposed by the present invention;

[0032] Figure 2 It is a schematic diagram of the positions of the first switching component and the second switching component of an embodiment of the fresh air humidity control device proposed by the present invention;

[0033] Figure 3 1 is a schematic diagram of the positions of the first heat exchanger and the second heat exchanger;

[0034] Figure 4 is a schematic diagram of the refrigerant communication between the first heat exchanger and the second heat exchanger;

[0035] Figure 5 is a schematic diagram of the switching component structure;

[0036] Figure 6 This is one of the schematic diagrams of the position of the conversion valve;

[0037] Figure 7 This is the second schematic diagram of the conversion valve position;

[0038] Figure 8 It is a schematic diagram of the cylindrical conversion main structure;

[0039] Fig. 9 It is a schematic diagram of the position of the switch valve port in the conversion valve;

[0040] Fig.10 is a schematic diagram of the working state of the conversion valve when the first switch member is in the open state;

[0041] Fig.11 is a schematic diagram of the working state of the conversion valve when the second switch member is in the open state;

[0042] Fig.12 It is a schematic diagram of the control valve structure;

[0043] Fig.13 It is one of the schematic diagrams of the limit barrier structure;

[0044] Fig.14 This is the second schematic diagram of the limit barrier structure;

[0045] Fig.15 This is the third schematic diagram of the limit barrier structure;

[0046] Fig.16 This is a schematic diagram of an air flow pattern in the summer dehumidification mode;

[0047] Fig.17 This is a schematic diagram of another air flow pattern in summer dehumidification mode;

[0048] Fig.18This is a schematic diagram of an airflow circulation method in winter humidification mode;

[0049] Fig.19 This is a schematic diagram of another air flow method in winter humidification mode;

[0050] In the figure,

[0051] 100. Outer shell;

[0052] 101. Outdoor air inlet;

[0053] 102. Outdoor exhaust vent;

[0054] 103. Indoor return air vent;

[0055] 104. Indoor air outlet;

[0056] 110. A first partition;

[0057] 120, second partition;

[0058] 130, third partition;

[0059] 201, air inlet pipe;

[0060] 202, air outlet pipe;

[0061] 203, a first heat exchange tube;

[0062] 204, second heat exchange tube;

[0063] 205, switching body; 2051, flow chamber;

[0064] 206. Switch valve;

[0065] 2061, first switch element; 2062, second switch element; 2063, switch valve port;

[0066] 207, limit barrier;

[0067] 208. Air volume adjustment unit;

[0068] 210, first switching member;

[0069] 220, second switching member;

[0070] 300, a first heat exchanger;

[0071] 400, a second heat exchanger;

[0072] 500. Compressor;

[0073] 600, four-way valve;

[0074] 700. Electronic expansion valve. DETAILED DESCRIPTION

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] refer to Figure 1-4 , a fresh air humidification device is proposed, which includes an outer shell 100, a switching element located in the outer shell 100, a heat exchange component, and an adsorption element (not shown) formed on the heat exchange component.

[0082] The heat exchange component is connected to the compressor 500, the four-way valve 600, and the electronic expansion valve 700 through pipelines to realize the transportation of refrigerant.

[0083] An outdoor air inlet 101, an outdoor air outlet 102, an indoor air supply outlet 104 and an indoor air return outlet 103 are formed on the outer shell 100, and a cavity is formed inside the outer shell 100. The cavity is divided into a first switching cavity, a heat exchange cavity and a second switching cavity by a first partition 110 and a second partition 120. The first switching cavity is located on the indoor side, and the second switching cavity is close to the outdoor side.

[0084] The heat exchange assembly is formed in the heat exchange cavity, including a first heat exchanger 300 and a second heat exchanger 400. A third partition 130 is arranged between the first heat exchanger 300 and the second heat exchanger 400. The installation direction of the third partition 130 can be horizontally set, and the first heat exchanger 300 and the second heat exchanger 400 are arranged up and down.

[0085] Of course, the installation direction of the third partition 130 is not limited to the horizontal setting. It can be set vertically in the heat exchange cavity or at an angle in the heat exchange cavity. The first heat exchanger 300 and the second heat exchanger 400 are respectively located on both sides of the third partition 130, and the first heat exchanger 300 and the second heat exchanger 400 operate independently.

[0086] Adsorbents are formed on the first heat exchanger 300 and the second heat exchanger 400 for adsorbing or releasing water vapor.

[0087] The switching components are respectively formed in the first switching cavity and the second switching cavity. According to the specific installation position of the switching components, the switching components are divided into a first switching component 210 installed in the first switching cavity and a second switching component 220 installed in the second switching cavity.

[0088] The first switching element 210 and the second switching element 220 both include a switching body 205 , on which an air inlet pipe 201 , an air outlet pipe 202 , a first heat exchange pipe 203 and a second heat exchange pipe 204 are disposed.

[0089] The air inlet pipe 201 of the first switching element 210 is connected to the indoor return air outlet 103 for inputting indoor polluted air, and the air outlet pipe 202 of the first switching element 210 is connected to the indoor return air outlet 103 for inputting outdoor fresh air into the room.

[0090] The air inlet pipe 201 on the second switching element 220 is connected to the outdoor air inlet 101 for inputting outdoor fresh air, and the air outlet pipe 202 of the first switching element 210 is connected to the outdoor air outlet 102 for discharging indoor polluted air outdoors.

[0091] The first heat exchange tubes 203 on the first switching element 210 and the second switching element 220 are both connected to the first heat exchanger 300 , and the second heat exchange tubes 204 on the first switching element and the second switching element are both connected to the second heat exchanger 400 .

[0092] A flow cavity 2051 is formed in the switching body 205, and a switching valve 206 is arranged in the flow cavity 2051 for realizing the switching between the air inlet pipe 201 and the first heat exchanger 300 or the second heat exchanger 400;

[0093] Preferably, the air inlet pipe 201 and the air outlet pipe 202 are respectively located on two opposite sides of the switching body 205, and the first heat exchange pipe 203 and the second heat exchange pipe 204 are located on the same side of the switching body 205 and are adjacent to the air inlet pipe 201 and the air outlet pipe 202.

[0094] like Figure 5-7 As shown, the conversion valve 206 is preferably a plate-type conversion valve arranged in the circulation cavity 2051. The inner wall of the circulation cavity 2051 is formed with two arc surfaces arranged opposite to each other. The conversion valve 206 rotates around the center line at a certain angle. During the rotation process, the two ends of the conversion valve 206 always maintain contact and connection with the arc surfaces at both ends, thereby realizing the connection between the first heat exchange tube 203 and the air inlet tube 201 or the air outlet tube 202.

[0095] Two communication holes (not shown) are respectively formed in the first partition 110 and the second partition 120 , and the first heat exchange tube 203 and the second heat exchange tube 204 pass through the communication holes to be connected to the first heat exchanger 300 and the second heat exchanger 400 , respectively.

[0096] like Figure 8As shown, in some other embodiments of the present application, the switching body 205 can also be designed to be cylindrical, the air inlet pipe 201 and the air outlet pipe 202 are located on the first end face of the switching body 205, the first heat exchange tube 203 and the second heat exchange tube 204 are located on the second end face of the switching body 205, the rotating shaft 161 is coaxially connected to the switching body 205, and the conversion valve 206 rotates in the switching body 205 to connect different pipelines located on the two end faces.

[0097] like Figure 9-11 As shown, in other embodiments, the conversion valve 160 includes a first switch member 2061 and a second switch member 2062 distributed at an angle, and a plurality of switch valve ports 2063 are dispersedly formed on the first switch member 2061 and the second switch member 2062, and each switch valve port 2063 is rotatably connected to a switch portion for controlling the switch of each switch valve port 2063, and each switch portion on the first switch member 2061 and the second switch member 2062 is respectively connected together by a connecting rod, and the connecting rod is controlled to move by a motor to realize synchronous switching of each switch valve on the first switch member 2061 or the second switch member 2062.

[0098] The motor controls the connecting rod to realize synchronous switching of the switch valves on the first switch member 2061 or the second switch member 2062. The principle can be referred to the shutter switch. This solution is not the design focus of this application and will not be elaborated here.

[0099] For example, when the switch valve ports 2063 on the first switch component 2061 are opened and the switch valve ports 2063 on the second switch component 2062 are closed, the air inlet pipe 201 is connected to the first heat exchange pipe 203, and the air outlet pipe 202 is connected to the second heat exchange pipe 204; conversely, the air inlet pipe 201 is connected to the second heat exchange pipe 204, and the air outlet pipe 202 is connected to the first heat exchange pipe 203.

[0100] like Fig.12 As shown, in some other embodiments, a regulating valve is further provided on the conversion assembly 100, and the regulating valve includes a second driving part and two air volume regulating parts 208 connected to the second driving part. After the second driving part is turned on, it drives each air volume regulating part 208 to move relative to the first heat exchange tube 203 and the second heat exchange tube 204, thereby adjusting the opening size of the first heat exchange tube 203 and the second heat exchange tube 204.

[0101] like Figure 13-15 As shown, in other embodiments, a plurality of limit baffles 207 are formed on the inner wall of the circulation cavity, and the conversion valve 206 stops when it rotates to the position of the limit baffle 207. Under the action of the limit baffle 207, the switching between the air inlet pipe 201 and the first heat exchange pipe 203 or the second heat exchange pipe 204 is realized.

[0102] According to actual installation space conditions, each of the limit baffles 207 is respectively located on both sides of the air inlet pipe 201 and the air outlet pipe 202, and / or each of the limit baffles 207 is respectively located on both sides of the first heat exchange tube 203 and the second heat exchange tube 204.

[0103] The limit baffle 207 replaces the arc surface of the inner wall of the circulation chamber, which can reduce the resistance and friction generated during the rotation of the conversion valve 206 relative to the arc surface, making the rotation process smoother, and can reduce the gas circulation resistance and noise.

[0104] In order to monitor the humidity of the fresh air delivered to the room in real time, a humidity detection device is provided at the indoor air supply outlet 104 .

[0105] The control unit is used to control the actions of the conversion valve 206 and the four-way valve 600. When the adsorbent on the first heat exchanger 300 or the second heat exchanger 400 reaches a saturated state, the control unit controls the four-way valve 600 and the conversion valve 206 to switch.

[0106] The temperature detection device detects the real-time fresh air humidity, and the saturation state of the adsorbent can be determined based on the humidity difference, thereby timely switching the direction of the four-way valve 600 and the conversion valve 206, and reusing the adsorbents in the first heat exchanger 300 and the second heat exchanger 400. There is no need to connect water supply or drainage pipelines in the equipment, thereby reducing the manufacturing cost of the equipment and simplifying the structural composition.

[0107] The working process of the fresh air humidity control device will be described in detail below in two modes: summer dehumidification and winter humidification.

[0108] The first heat exchange tube 203 is always connected to the first heat exchanger 300 , and the second heat exchange tube 204 is always connected to the second heat exchanger 400 .

[0109] <Summer Dehumidification>

[0110] Fig.16 The figure shows a connection mode for summer dehumidification. In this working mode, the switching valve 206 is in Figure 7 state, the first switching member 210 (ie, located at Figure 8 The air inlet pipe 201 of the switching element on the left side of the middle is connected to the first heat exchange pipe 203, the air outlet pipe 202 of the first switching element 210 is connected to the second heat exchange pipe 204, and the switching state of the conversion valve 206 in the second switching element 220 is as shown in FIG. Figure 6 As shown, the air inlet pipe 201 on the second switching element 220 is connected to the second heat exchange pipe 204 , and the air outlet pipe 202 on the second switching element 220 is connected to the first heat exchanger 300 .

[0111] Outdoor fresh air is delivered to the circulation cavity 2051 through the air inlet pipe 201 on the second switching element 220, and is delivered to the second heat exchanger 400 from the second heat exchange pipe 204. In this state, the second heat exchanger 400 is connected to the input end of the compressor as an evaporator, and the first heat exchanger 300 is connected to the output end of the compressor as a condenser.

[0112] The outdoor fresh air with a high moisture content is input into the second heat exchanger 400 (evaporator), and is cooled by the second heat exchanger 400. The moisture is condensed and adsorbed on the adsorption element on the surface of the second heat exchanger 400. After passing through the second heat exchanger 400, the dried indoor fresh air enters the first switching element 210 from the second heat exchange pipe 204 on the first switching element 210, and is finally output to the room from the outlet pipe 202 of the first switching element 210.

[0113] The indoor dirty air enters the circulation cavity 2051 of the first switching component 210 from the air inlet pipe 201 of the first switching component 210, and then enters the first heat exchanger 300 (condenser) from the first heat exchange pipe 203 of the first switching component 210. The indoor dirty air absorbs the heat released by the refrigerant in the first heat exchanger 300, and at the same time takes away the moisture released from the adsorption element on the surface of the first heat exchanger 300, and then enters the second switching component 220 from the first heat exchange pipe 203, and is finally discharged from the air outlet pipe 202 of the second switching component 220.

[0114] During operation, the humidity sensing device located at the indoor air outlet 104 monitors the humidity of the fresh air delivered into the room and transmits the humidity information to the control unit. The control center determines the change in moisture content per unit time and defines the moisture contents at two time points as di and di+1. When di+1-di≥D (D is greater than 0), the moisture content di+1 at the latter time point is greater than the moisture content di at the previous time point, indicating that the moisture absorption capacity of the adsorbent on the surface of the second heat exchanger 400 has deteriorated and the adsorbent has reached saturation.

[0115] At this time, the control unit controls the four-way valve 600 and the conversion valve 206 to switch directions, entering another connection mode for summer dehumidification.

[0116] like Fig.17 As shown, in this mode, the first heat exchanger 300 acts as an evaporator and the second heat exchanger 400 acts as a condenser.

[0117] The control unit controls the first switching member 210 and the conversion valve 206 in the second switching member 220 to rotate to a certain angle, and the conversion valve 206 on the first switching member 210 is in a Figure 6 State: the air inlet pipe 201 of the first switching element 210 is connected to the second heat exchange pipe 204 , and the air outlet pipe 202 of the first switching element 210 is connected to the first heat exchange pipe 203 .

[0118] The switching state of the switching valve 206 in the second switching element 220 is as follows: Figure 7 As shown: the air inlet pipe 201 on the second switching element 220 is connected to the first heat exchange pipe 203, and the air outlet pipe 202 on the second switching element 220 is connected to the second heat exchanger 400.

[0119] The outdoor fresh air is transported to the circulation cavity 2051 through the air inlet pipe 201 on the second switching element 220, and is transported to the first heat exchanger 300 from the first heat exchange pipe 203. The outdoor fresh air with a large moisture content is input into the first heat exchanger 300 (evaporator), and is cooled by the first heat exchanger 300. After the moisture condenses, it is adsorbed on the adsorption element on the surface of the first heat exchanger 300. The dried indoor fresh air enters the first switching element 210 from the first heat exchange pipe 203 on the first switching element 210, and is finally output to the room from the air outlet pipe 202 of the first switching element 210.

[0120] The indoor dirty air enters the circulation cavity 2051 of the first switching component 210 from the air inlet pipe 201 of the first switching component 210, and then enters the second heat exchanger 400 (condenser) from the second heat exchange pipe 204 of the first switching component 210. The indoor dirty air absorbs the heat released by the refrigerant in the second heat exchanger 400, and at the same time takes away the moisture released from the adsorption element on the surface of the second heat exchanger 400, and then enters the second switching component 220 from the second heat exchange pipe 204, and is finally discharged from the air outlet pipe 202 of the second switching component 220.

[0121] Similarly, the humidity of the outdoor fresh air output from the indoor air outlet 104 is monitored in real time by a humidity detection device. When the adsorbent on the surface of the second heat exchanger 400 reaches saturation, the four-way valve 600 and the conversion valve 206 are switched to repeat the previous dehumidification process.

[0122] In this way, during the dehumidification process in summer, the first heat exchange tube 203 is connected and interchanged with the first heat exchanger 300 and the second heat exchanger 400, so that the first heat exchanger 300 and the second heat exchanger 400 are alternately used as a condenser and an evaporator, and the desiccant elements on the surfaces of the two heat exchangers are reused to dehumidify the outdoor fresh air in summer, thereby reducing the arrangement of pipelines and saving installation space and energy.

[0123] <Winter Humidification>

[0124] Fig.18 Shown is a connection method for winter humidification:

[0125] In this working mode, the first switching element 210 (i.e., located at Fig.10 The switching valve 206 of the switching member on the left side of the middle is in Figure 7 In this state, the air inlet pipe 201 of the first switching element 210 is connected to the first heat exchange pipe 203 , and the air outlet pipe 202 of the first switching element 210 is connected to the second heat exchange pipe 204 .

[0126] The switching state of the switching valve 206 in the second switching element 220 is as follows: Figure 6 As shown, the air inlet pipe 201 on the second switching element 220 is connected to the second heat exchange pipe 204 , and the air outlet pipe 202 on the second switching element 220 is connected to the first heat exchanger 300 .

[0127] Outdoor fresh air is delivered to the circulation cavity 2051 through the air inlet pipe 201 on the second switching element 220, and is delivered to the second heat exchanger 400 from the second heat exchange pipe 204. In this state, the second heat exchanger 400 is connected to the output end of the compressor as a condenser, and the first heat exchanger 300 is connected to the input end of the compressor as an evaporator.

[0128] The dry outdoor fresh air is input into the second heat exchanger 400 (condenser), and is heated by the second heat exchanger 400, while taking away the moisture on the adsorbent that is pre-moistened with moisture. Finally, the outdoor fresh air after humidification and heating is output to the room from the air outlet pipe 202 of the first switching element 210.

[0129] The indoor polluted air enters the circulation cavity 2051 of the first switching component 210 from the air inlet pipe 201 of the first switching component 210, and then enters the first heat exchanger 300 (evaporator) from the first heat exchange pipe 203 of the first switching component 210. The indoor polluted air is cooled down. At the same time, the moisture in the indoor polluted air is condensed and adsorbed on the adsorption element on the surface of the first heat exchanger 300, and finally discharged from the air outlet pipe 202 of the second switching component 220.

[0130] During operation, the humidity sensing device located at the indoor air outlet 104 monitors the humidity of the fresh air delivered to the room and transmits the humidity information to the control unit. The control center determines the change in humidity content per unit time and defines the humidity content at the previous and next time points as di and di+1, respectively. When di- di+1≥D (D is greater than 0), the humidity content di at the previous time point is greater than the humidity content di+1 at the next time point, indicating that the humidification capacity of the adsorbent on the surface of the second heat exchanger 400 has deteriorated and the desorption of the adsorbent has been completed.

[0131] At this time, the control unit controls the four-way valve 600 and the conversion valve 206 to switch directions, entering another connection mode for winter humidification.

[0132] Another way to connect humidification in winter is:

[0133] like Fig.19 As shown, in this state, the first heat exchanger 300 acts as a condenser and the second heat exchanger 400 acts as an evaporator.

[0134] The switching valve 206 on the first switching element 210 is in Figure 6In this state, the air inlet pipe 201 of the first switching element 210 is connected to the second heat exchange pipe 204 , and the air outlet pipe 202 of the first switching element 210 is connected to the first heat exchange pipe 203 .

[0135] The switching state of the switching valve 206 in the second switching element 220 is as follows: Figure 7 As shown, the air inlet pipe 201 on the second switching element 220 is connected to the first heat exchange pipe 203 , and the air outlet pipe 202 on the second switching element 220 is connected to the second heat exchanger 400 .

[0136] The outdoor fresh air is transported to the circulation cavity 2051 through the air inlet pipe 201 on the second switching element 220, and is transported to the first heat exchanger 300 (condenser) from the first heat exchange pipe 203. The dry outdoor fresh air is input into the first heat exchanger 300 (condenser), and is heated by the first heat exchanger 300, while taking away the moisture on the adsorption element that is pre-moistened with moisture. Finally, the outdoor fresh air after humidification and heating is output to the room from the air outlet pipe 202 of the first switching element 210.

[0137] The indoor polluted air with a high moisture content enters the circulation cavity 2051 of the first switching component 210 from the air inlet pipe 201 of the first switching component 210, and then enters the second heat exchanger 400 (evaporator) from the second heat exchange pipe 204 of the first switching component 210. The indoor polluted air is cooled and cooled. At the same time, the moisture in the indoor polluted air is condensed and adsorbed on the adsorption element on the surface of the second heat exchanger 400, and finally discharged from the air outlet pipe 202 of the second switching component 220.

[0138] Similarly, the humidity of the outdoor fresh air output from the indoor air outlet 104 is monitored in real time by a humidity detection device. When the desorption process of the adsorbent on the surface of the first heat exchanger 300 is completed, the four-way valve 600 and the conversion valve 206 are reversed to repeat the previous winter humidification state.

[0139] 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 cavity is formed in the outer shell, and the cavity is divided into a first switching cavity, a heat exchange cavity and a second switching cavity by a first partition and a second partition; A switching member, which is formed in the first switching cavity and the second switching cavity respectively, the switching member comprises a switching body, an air inlet pipe, an air outlet pipe, a first heat exchange pipe and a second heat exchange pipe connected to the switching body, the air inlet pipe and the air outlet pipe are respectively located on two opposite sides of the switching body, and the first heat exchange pipe and the second heat exchange pipe are located on the same side of the switching body; a flow cavity is formed in the switching body, and a conversion valve is arranged in the flow cavity for realizing the connection between different pipelines; two arc surfaces arranged oppositely are formed on the inner wall of the flow cavity, and two ends of the conversion valve rotate along the arc surfaces to realize the connection between the first heat exchange pipe and the air inlet pipe or the air outlet pipe; a heat exchange assembly formed in the heat exchange cavity, comprising a first heat exchanger and a second heat exchanger, a third partition being provided between the first heat exchanger and the second heat exchanger, the first heat exchange tube being connected to the first heat exchanger, and the second heat exchange tube being connected to the second heat exchanger; Adsorbent: The first heat exchanger and the second heat exchanger are both provided with adsorbents for adsorbing or releasing moisture.

2. The fresh air humidity control device according to claim 1, characterized in that: The switching element includes a first switching element and a second switching element. The first switching element is located in the first switching cavity, and the second switching element is located in the second switching cavity.

3. The fresh air humidity control device according to claim 1, characterized in that: The third partition is horizontally arranged in the heat exchange cavity.

4. The fresh air humidity control device according to claim 1, characterized in that: Two connecting holes are respectively formed on the first partition and the second partition. The first heat exchange tube passes through the corresponding connecting holes to be connected to the first heat exchanger, and the second heat exchange tube passes through the corresponding connecting holes to be connected to the second heat exchanger.

5. The fresh air humidity control device according to claim 1, characterized in that: The indoor air supply outlet is provided with a humidity detection device for detecting the humidity of the fresh air input into the room.

6. The fresh air humidity control device according to claim 1, characterized in that: The first heat exchanger and the second heat exchanger are both connected to the compressor via a four-way valve.

7. The fresh air humidity control device according to claim 6, characterized in that: An electronic expansion valve is also arranged between the first heat exchanger and the second heat exchanger.

8. The fresh air humidity control device according to claim 6, characterized in that: Also included is a control unit configured as follows: In the summer dehumidification state, when the adsorption effect of the adsorbent on the first heat exchanger or the second heat exchanger reaches saturation; or, In the winter humidification state, the desorption process of the adsorbent on the first heat exchanger or the second heat exchanger ends, and the control unit controls the four-way valve and the conversion valve to switch directions.

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