Humidifying machine and control method thereof

Abstract

The invention discloses a humidifying machine and a control method thereof, and belongs to the field of air treatment. The humidifying machine comprises a fresh air duct and an exhaust air duct. The heat exchanger comprises a first heat exchanger and a third heat exchanger which are positioned on two sides of the first adsorption module, and a second heat exchanger and a fourth heat exchanger which are positioned on two sides of the second adsorption module; the heat exchanger on-off device is used for controlling on-off of the heat exchanger in the refrigerant loop; the bypass air valve is used for controlling communication or disconnection of the fresh air duct and the exhaust air duct; wherein the heat exchanger on the windward side of the adsorption module in the fresh air duct serves as a target heat exchanger, and air on the inlet side of the target heat exchanger serves as target air; the control method comprises the steps that whether the dew point temperature of target air is smaller than the difference between the temperature of a target heat exchanger and a preset value or not is judged, if not, it is judged that the condensation risk exists, the bypass air valve is controlled to be opened, and indoor air of the exhaust air duct enters the fresh air duct. According to the humidifying machine, the condensation risk is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of air treatment, and in particular to a humidifier and a control method thereof. Background Art

[0002] The humidifier is used to humidify / dehumidify the outdoor fresh air and then send it into the room. It mainly achieves dehumidification and waterless humidification functions through the adsorption / desorption of adsorption materials.

[0003] When fresh air is introduced into the room, the high humidity difference between indoors and outdoors will most likely cause obvious condensation. A humid environment is very likely to breed harmful components such as microorganisms, causing the air quality to deteriorate again. In addition, the appearance of condensation will place more stringent requirements on electrical safety and greatly increase operating costs. Summary of the invention

[0004] The present application provides a humidifier and a control method thereof, which uses the fresh air inlet temperature and humidity as the target air to monitor and adjust the condensation of the device, thereby reducing the risk of condensation in the air.

[0005] In one aspect of the present application, a humidifier comprises: a housing, in which a fresh air duct and an exhaust air duct are arranged; an adsorption module, comprising a first adsorption module and a second adsorption module having a moisture adsorbent, wherein one of the first adsorption module and the second adsorption module is located in the fresh air duct and the other is located in the exhaust air duct; a heat exchanger, comprising a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, wherein the first heat exchanger is located on a windward side of the first adsorption module, the third heat exchanger is located on an outlet side of the first adsorption module, the second heat exchanger is located on a windward side of the second adsorption module, and the fourth heat exchanger is located on an outlet side of the second adsorption module;

[0006] The heat exchanger on-off device is connected to the refrigerant circuit of the humidifier and is used to control the on-off of the heat exchanger in the refrigerant circuit;

[0007] A bypass air valve is provided near the air inlet side of the fresh air duct to connect or disconnect the fresh air duct and the exhaust air duct;

[0008] Among them, the heat exchanger located in the fresh air duct of the first heat exchanger and the second heat exchanger is taken as the target heat exchanger, and the air at the inlet side of the target heat exchanger is taken as the target air;

[0009] The humidifier also includes: a controller, which is used to: when the dew point temperature of the target air is not less than the difference between the temperature of the target heat exchanger and a preset value, control the bypass air valve to open so that the indoor air in the exhaust air duct enters the fresh air duct.

[0010] In this application, the temperature and humidity of the target air at the inlet side of the heat exchanger in the fresh air duct is used as the control point to monitor and adjust the condensation of the device, thereby reducing the risk of condensation in the air inside the machine. A bypass air valve is set between the fresh air duct and the exhaust air duct. When there is a risk of condensation, the bypass air valve is opened to reduce the dew point temperature of the target air by mixing air, thereby achieving humidity control above the dew point temperature.

[0011] In some embodiments, the controller is used to: in the cooling mode, under the condition that the temperature of the target air is not greater than the sixth preset temperature, determine whether the dew point temperature of the target air is less than the difference between the temperature of the target heat exchanger and the preset value, and whether the outdoor air humidity is less than the first preset humidity.

[0012] If it is true, the bypass valve is controlled to be closed, and mode D is executed: the third heat exchanger and the fourth heat exchanger are connected, and the first heat exchanger and the second heat exchanger are disconnected; if it is not true, the bypass valve is controlled to be opened, and mode A is executed: the first heat exchanger and the second heat exchanger are connected, and the third heat exchanger and the fourth heat exchanger are disconnected.

[0013] In the present application, under the working conditions that the sensible heat load in the fresh air is slightly high, the latent heat load is not large, and the dew point temperature is not high, mode D is executed: only cooling; under the working conditions that the sensible heat load in the target air is slightly high, the latent heat load is large, or the dew point temperature is high, the bypass air valve is opened to reduce the relative humidity of the target air, and mode A is executed to perform basic cooling and dehumidification, which is more energy-saving and avoids energy waste while meeting the temperature and humidity comfort requirements.

[0014] In some embodiments, the controller is used to: in the cooling mode, when the temperature of the target air is greater than the sixth preset temperature and the dew point temperature of the target air is not less than the difference between the temperature of the target heat exchanger and the preset value, determine whether the relative humidity of the target air is greater than the third preset humidity value, and if so, enter the first operating state: control the bypass air valve to open to the first opening; if not, enter the second operating state: control the bypass air valve to open to the second opening; wherein, at the same wind speed, the fresh air volume in the target air at the first opening is less than the fresh air volume at the second opening.

[0015] In the present application, when the sensible heat load and latent heat load of the fresh air are high, a small amount of fresh air is introduced; when the sensible heat load of the fresh air is high and the latent heat load is not too high, a large amount of fresh air is introduced to avoid condensation under high humidity conditions as much as possible.

[0016] In some embodiments, the controller is used to: in a first operating state, execute mode C: the first heat exchanger and the second heat exchanger are connected, the third heat exchanger and the heat exchanger located in the fresh air duct of the fourth heat exchanger are connected, and the compressor is controlled to operate at a second preset frequency, and the speed of the fan in the humidifier is controlled to operate at a fourth preset speed; in a second operating state, execute mode C, and control the compressor to operate at a third preset frequency higher than the second preset frequency, and the speed of the fan is controlled to operate at a third preset speed lower than the fourth preset speed.

[0017] In some embodiments, the controller is used to: in the cooling mode, when the temperature of the target air is greater than the sixth preset temperature and the dew point temperature of the target air is less than the difference between the temperature of the target heat exchanger and the preset value, determine whether the sum of the absolute humidity of the indoor air and the preset humidity deviation value is greater than the absolute humidity of the target air.

[0018] If so, the bypass air valve is controlled to be in a closed state, and the first state of execution mode B is: all heat exchangers are connected, the four-way valve in the refrigerant circuit remains in the current state, and the air valve switching device does not switch the state; if not, the bypass air valve is controlled to be in a closed state, and execution mode B is: all heat exchangers are connected, and the four-way valve and the air valve switching device switch the state according to the preset switching conditions.

[0019] In the present application, when the target air dew point temperature is not high, whether dehumidification is needed is determined by comparing the absolute humidity indoors and outdoors, and the environmental conditions are further subdivided. When the absolute humidity is not high, the four-way valve and the air valve switching device do not switch, thereby reducing the frequency of state changes of the four-way valve and the air valve switching device and increasing their service life.

[0020] In some embodiments, the controller is used to: in the ventilation mode, determine whether the relative humidity of the target air is greater than the second preset humidity value; if not, control the bypass air valve to remain in a closed state, and execute mode I: the compressor is in a closed state, and the air valve switching device remains in a first state; if yes, enter the control step of the bypass air valve:

[0021] It is determined whether the dew point temperature of the target air is less than the difference between the temperature of the target heat exchanger and the preset value. If so, the bypass vent valve is closed; if not, the bypass vent valve is controlled to open.

[0022] In some embodiments, the controller is configured to: after the step of controlling the bypass air valve, compare the indoor air temperature with the outdoor air temperature;

[0023] If the indoor air temperature is lower than the outdoor air temperature, cooling mode A is executed: the first heat exchanger and the second heat exchanger are connected, and the third heat exchanger and the fourth heat exchanger are disconnected;

[0024] If the indoor air temperature is not less than the outdoor air temperature, the heating mode H is executed: the third heat exchanger and the fourth heat exchanger are connected, and the first heat exchanger and the second heat exchanger are disconnected.

[0025] In this application, when the outdoor humidity is high and the outdoor temperature is slightly high, A is executed to perform basic refrigeration and dehumidification. When the outdoor temperature is slightly low, H is executed to reduce the relative humidity by raising the temperature, thereby achieving temperature and humidity regulation in a more energy-saving manner.

[0026] In some embodiments, the controller is used for: in the heating mode, if the target air temperature is not less than the third preset temperature and less than the fourth preset temperature, then determining whether the relative humidity of the target air is greater than the first preset humidity, if so, executing mode H: the third heat exchanger and the fourth heat exchanger are connected, the first heat exchanger and the second heat exchanger are disconnected, and the bypass air valve is controlled to be disconnected; if not, executing mode G: the first heat exchanger and the second heat exchanger are connected, the heat exchanger of the third heat exchanger and the fourth heat exchanger located in the fresh air duct is connected, and the bypass air valve is controlled to be opened.

[0027] In some embodiments, the controller is used to: in the heating mode, if the target air temperature is not less than the second preset temperature and less than the third preset temperature, execute mode G and control the bypass vent valve to open to the second opening degree;

[0028] If the target air temperature is not less than the first preset temperature and less than the second preset temperature, then executing mode F: all heat exchangers are connected, and the bypass air valve is controlled to open to a third opening degree;

[0029] If the target air temperature is lower than the first preset temperature, mode E is executed: the first heat exchanger and the second heat exchanger are connected, the third heat exchanger and the fourth heat exchanger are disconnected, and the bypass air valve is controlled to open to a first opening degree;

[0030] Among them, under the same wind speed, the fresh air volume in the target air at the first opening degree is smaller than the fresh air volume at the third opening degree, and the fresh air volume at the third opening degree is smaller than the fresh air volume at the second opening degree.

[0031] Another aspect of the present application is a control method for a humidifier, the humidifier comprising: a housing, in which a fresh air duct and an exhaust air duct are arranged; an adsorption module, comprising a first adsorption module and a second adsorption module having a moisture adsorbent, wherein one of the first adsorption module and the second adsorption module is located in the fresh air duct and the other is located in the exhaust air duct; a heat exchanger, comprising a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, wherein the first heat exchanger is located on a windward side of the first adsorption module, the third heat exchanger is located on an outlet side of the first adsorption module, the second heat exchanger is located on a windward side of the second adsorption module, and the fourth heat exchanger is located on an outlet side of the second adsorption module;

[0032] The heat exchanger on-off device is connected to the refrigerant circuit of the humidifier and is used to control the on-off of the heat exchanger in the refrigerant circuit;

[0033] A bypass air valve is provided near the air inlet side of the fresh air duct to connect or disconnect the fresh air duct and the exhaust air duct;

[0034] Among them, the heat exchanger located in the fresh air duct of the first heat exchanger and the second heat exchanger is taken as the target heat exchanger, and the air at the inlet side of the target heat exchanger is taken as the target air;

[0035] The control method includes: determining whether the dew point temperature of the target air is less than the difference between the temperature of the target heat exchanger and a preset value; if not, determining that there is a condensation risk, and controlling the bypass air valve to open so that the indoor air in the exhaust duct enters the fresh air duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A schematic diagram of a humidity control machine according to some embodiments is shown;

[0037] Figure 2 Shows Figure 1 Schematic diagram of the opening of the center bypass vent valve;

[0038] Figure 3 shows an airflow path diagram of a humidifier in a first state according to some embodiments;

[0039] Figure 4 shows an airflow path diagram of a humidifier in a second state according to some embodiments;

[0040] Figure 5 A refrigerant circuit diagram of a humidifier according to some embodiments is shown;

[0041] Figure 6 A refrigerant circuit diagram of a humidifier according to some other embodiments is shown;

[0042] Figure 7 A refrigerant circuit diagram of a humidifier in mode A / mode E according to some embodiments is shown;

[0043] Figure 8 A refrigerant circuit diagram of a humidifier in mode B / mode F according to some embodiments is shown;

[0044] Fig. 9 1 shows a refrigerant circuit diagram of a humidifier in mode C according to some embodiments;

[0045] Fig.10 1 shows a refrigerant circuit diagram of a humidifier in mode D according to some embodiments;

[0046] Fig.111 shows a refrigerant circuit diagram of a humidifier in mode G according to some embodiments;

[0047] Fig.12 1 shows a refrigerant circuit diagram of a humidifier in mode H according to some embodiments;

[0048] Fig.13 A control block diagram of a humidity control machine according to some embodiments is shown;

[0049] Fig.14 A flow chart showing automatic selection of working modes for a humidifier according to some embodiments is shown;

[0050] Fig.15 A flow chart showing a humidifier in ventilation mode according to some embodiments;

[0051] Fig.16 A flow chart showing a humidifier in cooling mode according to some embodiments is shown;

[0052] Fig.17 A flow chart of a humidifier in a heating mode according to some embodiments is shown. DETAILED DESCRIPTION

[0053] In order to make the purpose and implementation method of the present application clearer, the exemplary implementation method of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0054] 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 referred device or element 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.

[0055] The terms "first", "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.

[0056] 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 or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0057] The humidifier adjusts the humidity of outdoor air taken in from the outside and then supplies it to the room, and adjusts the humidity of indoor air taken in from the room and then discharges it to the outside. Therefore, the humidifier usually has two air ducts: a fresh air duct and an exhaust air duct. The fresh air duct circulates outdoor air, and the exhaust air duct circulates indoor air. When one duct humidifies the air, the other duct dehumidifies the air.

[0058] A humidifier usually includes an adsorbent material and a refrigerant system. The humidifier mainly absorbs water through the adsorption action of the adsorbent material, thereby drying the air and achieving the purpose of dehumidification; the regeneration action of the adsorbent material causes water to evaporate from the adsorbent, thereby humidifying the air and achieving the purpose of humidification.

[0059] The two heat exchangers of the refrigerant system serve as an evaporator and a condenser to adjust the air temperature on the windward side of the adsorption material, so that during dehumidification, the evaporator cools the air temperature at the adsorption material inlet, so that the moisture in the air can be better adsorbed by the adsorption material; during humidification, the condenser heats the air temperature at the adsorption material inlet, so that the adsorption material is heated and regenerated.

[0060] There are usually three forms of implementation of the adsorption material: the first is to make the adsorption material into an adsorption wheel; the second is to coat the adsorption material on the evaporator and the condenser; the third is to make the adsorption material into two adsorption modules.

[0061] In the embodiment of the adsorption wheel, the adsorption wheel has a first adsorption module corresponding to the fresh air duct and a second adsorption module corresponding to the exhaust air duct, and one of the first adsorption module and the second adsorption module is used as an adsorption zone, and the other is used as a regeneration zone.

[0062] When the humidifier dehumidifies outdoor air, outdoor air is introduced into the fresh air duct, so that the outdoor air is cooled when passing through the evaporator, and then the moisture is removed by passing through the adsorption area of ​​the adsorption wheel, and then supplied to the room; indoor air is introduced into the exhaust air duct, and the condenser first heats the indoor air, and then when the indoor air passes through the regeneration area of ​​the adsorption wheel, the moisture absorbed by the adsorption wheel in the adsorption area is separated from the indoor air, thereby regenerating the adsorption material. That is, the adsorption area of ​​the adsorption wheel absorbs moisture from the outdoor air, and as the adsorption wheel rotates, the adsorption area rotates to the exhaust air duct and becomes the regeneration area, and the absorbed moisture is then discharged to the outdoors along with the indoor air.

[0063] Similarly, when the humidifier is humidifying, the moisture of the indoor air absorbed by the adsorption wheel in the exhaust air duct is supplied to the outdoor air in the fresh air duct, thereby humidifying the outdoor air.

[0064] The moisture in indoor air and outdoor air is transferred by the rotation of the adsorption wheel.

[0065] In the embodiment where the adsorbent material is coated on two heat exchangers, the two heat exchangers to which the adsorbent material is attached constitute the first humidity conditioning component and the second humidity conditioning component, respectively.

[0066] In the embodiment where the adsorption material is made into two adsorption modules, one group of heat exchangers and adsorption modules constitutes a first humidity control component, and the other group of heat exchangers and adsorption modules constitutes a second humidity control component.

[0067] The four-way valve of the refrigerant system is switched according to a preset cycle or preset conditions, and the first humidity control component and the second humidity control component alternately function as a dehumidifier and a humidifier, thereby repeatedly absorbing and discharging water.

[0068] In these two embodiments, it is also necessary to introduce an air valve switching device. The air valve switching device is used to switch the air flowing through the first humidity control component and the second humidity control component. The air valve switching device determines that the outdoor air flows through one of the dehumidifier and the humidifier, and the indoor air flows through the other. For example, when dehumidifying the fresh air, the air valve switching device allows the outdoor air to always flow through the dehumidifier and the indoor air to always flow through the humidifier; when humidifying the fresh air, the air valve switching device allows the outdoor air to always flow through the humidifier and the indoor air to always flow through the dehumidifier.

[0069] Reference Figure 1 According to the embodiment of the present application, the humidifier includes a housing 110 , an adsorption module and a damper switching device 400 .

[0070] The housing 110 is provided with four air outlets, namely, a fresh air inlet OA, a fresh air supply outlet SA, an indoor return air outlet RA and an indoor exhaust air outlet EA. The fresh air inlet OA and the fresh air supply outlet SA are connected to form a fresh air duct, and the indoor return air outlet RA and the indoor exhaust air outlet EA are connected to form an exhaust air duct.

[0071] In actual application scenarios, the indoor return air outlet RA and the fresh air supply outlet SA are extended to the target room through external air ducts, and the indoor exhaust air outlet EA and the fresh air inlet OA are extended to the outdoors through external air ducts.

[0072] An air processing chamber is provided in the housing 110, and the air processing chamber is used for dehumidifying or humidifying fresh air.

[0073] The air processing chamber includes a first air processing chamber 111 and a second air processing chamber 112. The first air processing chamber 111 is provided with a first heat exchanger 13 and a first adsorption module 310, and the second air processing chamber 112 is provided with a second heat exchanger 14 and a second adsorption module 320. The first heat exchanger 13 is located on the windward side of the first adsorption module 310, and the second heat exchanger 14 is located on the windward side of the second adsorption module 320.

[0074] The air handling chamber is located in the middle of the housing 110. The front and rear ends of the air handling chamber are provided with an air valve switching device 400, which can be switched between a first state and a second state. In the first state, the first air handling chamber 111 is connected to the fresh air inlet OA and the fresh air supply port SA, and the second air handling chamber 112 is connected to the indoor return air port RA and the indoor exhaust air port EA, that is, the first air handling chamber 111 is connected to the fresh air duct, and the second air handling chamber 112 is connected to the exhaust air duct; in the second state, the first air handling chamber 111 is connected to the indoor return air port RA and the indoor exhaust air port EA, and the second air handling chamber 112 is connected to the fresh air inlet OA and the fresh air supply port SA, that is, the first air handling chamber 111 is connected to the exhaust air duct, and the second air handling chamber 112 is connected to the fresh air duct.

[0075] It should be noted that the air valve switching device 400 is applicable to the existing technology and will not be described in detail here.

[0076] Specifically, the air valve switching device includes a front air valve switching device 410 close to the air inlet side and a rear air valve switching device 420 close to the air outlet side.

[0077] The humidifier further includes a blower 210 and an exhaust fan 220. The blower 210 is provided corresponding to the fresh air supply outlet SA to drive the outdoor air to flow; the exhaust fan 220 is provided corresponding to the indoor exhaust outlet EA to drive the indoor air to flow.

[0078] Reference Figure 5In addition to the first heat exchanger 13 and the second heat exchanger 14, the refrigerant circuit of the humidifier also includes a compressor 11, a four-way valve 12, an electronic expansion valve and an on-off valve.

[0079] The compressor 11, the four-way valve 12, the first heat exchanger 13, the electronic expansion valve, the second heat exchanger 14 and the gas-liquid separator 16 are connected to form a circulation loop.

[0080] The compressor 11 compresses the refrigerant; one of the first heat exchanger 13 and the second heat exchanger 14 performs heat exchange between indoor air and the refrigerant, and the other performs heat exchange between outdoor air and the refrigerant; the four-way valve 12 selectively guides the refrigerant compressed by the compressor 11 to the first heat exchanger 13 or the second heat exchanger 14 according to heating or cooling; the electronic expansion valve decompresses the refrigerant; and the gas-liquid separator 16 prevents the unevaporated refrigerant from flowing to the compressor 11.

[0081] In some embodiments, in combination Figure 1 and Figure 5 A third heat exchanger 17 and a fourth heat exchanger 18 are also provided in the air processing chamber. The third heat exchanger 17 is located at the air outlet side of the first adsorption module 310 ; the fourth heat exchanger 18 is located at the air outlet side of the second adsorption module 320 .

[0082] In the refrigerant circuit, the first heat exchanger 13 is connected in series with the first electronic expansion valve 151 and the second electronic expansion valve 152 in sequence, and then connected to the second heat exchanger 14 .

[0083] The first end of the third heat exchanger 17 is connected in series with the third electronic expansion valve 153 and then connected to the first end of the fourth heat exchanger 18; a first branch and a second branch in parallel are provided between the second end of the third heat exchanger 17 and the second end of the fourth heat exchanger 18, the first branch is connected in series with the first on-off valve 191 and the second on-off valve 192, and the second branch is connected in series with the third on-off valve 193 and the fourth on-off valve 194.

[0084] The exhaust port of the compressor 11 is connected between the third on-off valve 193 and the fourth on-off valve 194 , and the intake port of the compressor 11 is connected between the first on-off valve 191 and the second on-off valve 192 through the gas-liquid separator 16 .

[0085] The refrigerant circuit also includes a third branch, one end of the third branch is connected between the first electronic expansion valve 151 and the second electronic expansion valve 152, the other end of the third branch is connected between the first end of the third heat exchanger 17 and the third electronic expansion valve 153, and the fifth on-off valve 195 is connected in series on the third branch.

[0086] A sixth on-off valve 196 is connected in series between the exhaust port of the compressor 11 and the four-way valve 12 .

[0087] The six on-off valves constitute the on-off device of the heat exchanger. By controlling the state of the on-off valves, the on-off control of the heat exchanger in the refrigerant circuit can be achieved.

[0088] In other embodiments, reference Figure 6 The first on-off valve 191, the second on-off valve 192, the third on-off valve 193 and the fourth on-off valve 194 can be replaced by the second four-way valve 12a; the exhaust port of the compressor 11 is connected in series with the d pipe of the second four-way valve 12a after the seventh on-off valve 197.

[0089] The first heat exchanger 13 and the second heat exchanger 14 are main heat exchangers, and the third heat exchanger 17 and the fourth heat exchanger 18 are auxiliary heat exchangers. The third heat exchanger 17 and the fourth heat exchanger 18 are mainly used to adjust the supply air temperature.

[0090] The width of the auxiliary heat exchanger can be smaller than that of the main heat exchanger, so that the heat exchange area of ​​the auxiliary heat exchanger is smaller than that of the main heat exchanger, so as to avoid the auxiliary heat exchanger diverting too much refrigerant when both the main heat exchanger and the auxiliary heat exchanger are working, thereby affecting the main heat exchange function of the main heat exchanger.

[0091] The following describes the working mode of the humidifier.

[0092] [Cooling mode]

[0093] The first state of mode A in cooling mode:

[0094] Reference Figure 7 The left side view shows the flow path in bold solid lines, and the first on-off valve 191, the second on-off valve 192, the third on-off valve 193, the fourth on-off valve 194 and the fifth on-off valve 195 are all disconnected, so that the third heat exchanger 17 and the fourth heat exchanger 18 are disconnected in the refrigerant circuit.

[0095] The sixth on-off valve 196 is connected, and the first heat exchanger 13 and the second heat exchanger 14 are connected in the refrigerant circuit. The four-way valve 12 guides the refrigerant compressed by the compressor 11 to the second heat exchanger 14, and the second heat exchanger 14 serves as a condenser, and the first heat exchanger 13 serves as an evaporator.

[0096] Refrigerant circuit: exhaust port of compressor 11 → dc channel of four-way valve 12 → second heat exchanger 14 → second electronic expansion valve 152 → first electronic expansion valve 151 → first heat exchanger 13 → es channel of four-way valve 12 → gas-liquid separator 16 → intake port of compressor 11.

[0097] Reference Figure 3 , the air valve switching device 400 is in a first state: the first air processing chamber 111 is connected to the fresh air duct, and the second air processing chamber 112 is connected to the exhaust air duct.

[0098] Fresh air duct: Fresh air enters the device from the fresh air inlet OA, reaches the front air valve switching device 410, and then reaches the first heat exchanger 13 (evaporator), where the fresh air is cooled and dehumidified. Then, it reaches the first adsorption module 310, where the fresh air is dehumidified again. Since heat is released after adsorption and dehumidification, the temperature of the fresh air increases. Then, it passes through the third heat exchanger 17 (the third heat exchanger 17 is not working at this time), and then passes through the rear air valve switching device 420. Finally, the fresh air is driven by the blower 210 and delivered into the room from the fresh air supply port SA.

[0099] Exhaust air duct: Indoor air enters the device from the indoor return air port RA, reaches the front air valve switching device 410, and then reaches the second heat exchanger 14 (condenser). The indoor air temperature rises again, and then reaches the second adsorption module 320. Under the action of high-temperature air, the moisture adsorbed inside the second adsorption module 320 is brought out. Since the moisture evaporates and absorbs heat, the exhaust air temperature is reduced. Then it passes through the fourth heat exchanger 18 (the fourth heat exchanger 18 is not working at this time), and then passes through the rear air valve switching device 420. Finally, the indoor air is driven by the exhaust fan 220 and discharged to the outside through the indoor exhaust port EA.

[0100] The second state of mode A in cooling mode:

[0101] The switching state of the four-way valve 12 enables the functions of the first heat exchanger 13 and the second heat exchanger 14 to be interchanged.

[0102] Refrigerant circuit: Refer to Figure 7 Right side view, exhaust port of compressor 11 → de channel of four-way valve 12 → first heat exchanger 13 (condenser) → first electronic expansion valve 151 → second electronic expansion valve 152 → second heat exchanger 14 (evaporator) → cs channel of four-way valve 12 → gas-liquid separator 16 → intake port of compressor 11.

[0103] Reference Figure 4 , the air valve switching device 400 is switched to the second state, so that the first air processing chamber 111 is connected to the exhaust air duct, and the second air processing chamber 112 is connected to the fresh air duct.

[0104] Fresh air duct: fresh air → fresh air inlet OA → front air valve switching device 410 → second heat exchanger 14 (evaporator) → second adsorption module 320 → fourth heat exchanger 18 (the fourth heat exchanger 18 is not working at this time) → rear air valve switching device 420 → blower 210 → fresh air supply outlet SA → into the room.

[0105] Exhaust air duct: indoor air → indoor return air outlet RA → front air valve switching device 410 → first heat exchanger 13 (condenser) → first adsorption module 310 → third heat exchanger 17 (the third heat exchanger 17 is not working at this time) → rear air valve switching device 420 → exhaust fan 220 → indoor exhaust outlet EA → exhaust to the outside.

[0106] When the humidifier is in operation mode A, it cycles alternately between the first state and the second state according to a preset switching condition.

[0107] The first state of mode B in cooling mode:

[0108] The difference from the first state of mode A is that Figure 8 As shown in the left side view of FIG. 1 , the first on-off valve 191 and the fourth on-off valve 194 are connected, so that the third heat exchanger 17 and the fourth heat exchanger 18 are connected in the refrigerant circuit.

[0109] Refrigerant circuit: It has two circuits, one circuit is the exhaust port of the compressor 11 → the dc channel of the four-way valve 12 → the second heat exchanger 14 (condenser) → the second electronic expansion valve 152 → the first electronic expansion valve 151 → the first heat exchanger 13 (evaporator) → the es channel of the four-way valve 12 → the gas-liquid separator 16 → the intake port of the compressor 11.

[0110] Another circuit is the exhaust port of the compressor 11 → the fourth on-off valve 194 → the fourth heat exchanger 18 (condenser) → the third electronic expansion valve 153 → the third heat exchanger 17 (evaporator) → the fourth on-off valve 191 → the gas-liquid separator 16 → the air intake port of the compressor 11.

[0111] Reference Figure 3 , Fresh air duct: The flow path is the same as the first state of mode A, the only difference is that the third heat exchanger 17 in the path works as an evaporator.

[0112] The temperature of the fresh air is reduced after passing through the third heat exchanger 17. The third heat exchanger 17 is an auxiliary heat exchanger that has the function of adjusting the supply air temperature, thereby ensuring the stability of the supply air temperature and avoiding the temperature rise caused by the large dehumidification capacity of the adsorption module.

[0113] Exhaust air duct: The flow path is the same as the first state of mode A, the only difference is that the fourth heat exchanger 17 in the path works as a condenser.

[0114] The second state of mode B in cooling mode:

[0115] Reference Figure 8 In the right side view, the four-way valve 12 switches state so that the functions of the first heat exchanger 13 and the second heat exchanger 14 are interchanged.

[0116] The first on-off valve 191 and the fourth on-off valve 194 are disconnected, and the second on-off valve 152 and the third on-off valve 153 are connected, so that the functions of the third heat exchanger 17 and the fourth heat exchanger 18 are interchanged.

[0117] Refrigerant circuit: exhaust port of compressor 11 → de channel of four-way valve 12 → first heat exchanger 13 (condenser) → first electronic expansion valve 151 → second electronic expansion valve 152 → second heat exchanger 14 (evaporator) → cs channel of four-way valve 12 → gas-liquid separator 16 → intake port of compressor 11.

[0118] Exhaust port of compressor 11 → third on-off valve 193 → third heat exchanger 17 (condenser) → third electronic expansion valve 153 → fourth heat exchanger 18 (evaporator) → second on-off valve 192 → gas-liquid separator 16 → air intake port of compressor 11 .

[0119] Reference Figure 4 , the air valve switching device 400 is switched to the second state, so that the first air processing chamber 111 is connected to the exhaust air duct, and the second air processing chamber 112 is connected to the fresh air duct.

[0120] Fresh air duct: the flow path is the same as the second state of mode A, the only difference is that the fourth heat exchanger 18 in the path works as an evaporator.

[0121] The temperature of the fresh air is reduced after passing through the fourth heat exchanger 18. The fourth heat exchanger 18 is an auxiliary heat exchanger that has the function of adjusting the supply air temperature, thereby ensuring the stability of the supply air temperature and avoiding the temperature rise caused by the large dehumidification capacity of the adsorption module.

[0122] Exhaust air duct: The flow path is the same as the second state of mode A, the only difference is that the third heat exchanger 17 in the path works as a condenser.

[0123] When the humidifier is in operation mode B, it cycles alternately between the first state and the second state according to a preset switching condition.

[0124] The first state of mode C in cooling mode:

[0125] The difference from the first state of cooling mode A is that Fig. 9 As shown in the left side view of FIG. 1 , the first on-off valve 191 and the fifth on-off valve 195 are connected, so that the third heat exchanger 17 is connected in the refrigerant circuit.

[0126] Refrigerant circuit: exhaust port of compressor 11 → dc channel of four-way valve 12 → second heat exchanger 14 (condenser) → second electronic expansion valve 152, and then divided into two paths, one path is → first electronic expansion valve 151 → first heat exchanger 13 (evaporator); the other path is → fifth on-off valve 195 → third heat exchanger 17 (evaporator), and then the two paths merge → es channel of four-way valve 12 → gas-liquid separator 16 → suction port of compressor 11.

[0127] Reference Figure 3 , Fresh air duct: The flow path is the same as the first state of mode A, the only difference is that the third heat exchanger 17 in the path works as an evaporator to ensure the temperature conditions of fresh air supply. At this time, the overall capacity is slightly weaker than mode B.

[0128] Exhaust duct: The flow path is the same as the first state of mode A.

[0129] The second state of mode C in cooling mode:

[0130] Reference Fig. 9 In the right side view, the four-way valve 12 switches state so that the functions of the first heat exchanger 13 and the second heat exchanger 14 are interchanged.

[0131] The second on-off valve 192 and the fifth on-off valve 195 are connected, and the first on-off valve 191, the third on-off valve 193, and the fourth on-off valve 194 are disconnected, so that the fourth heat exchanger 18 is connected in the refrigerant circuit and the third heat exchanger 17 is disconnected.

[0132] Reference Figure 4 , the air valve switching device 400 is switched to the second state, so that the first air processing chamber 111 is connected to the exhaust air duct, and the second air processing chamber 112 is connected to the fresh air duct.

[0133] Fresh air duct: The flow path is the same as the second state of mode A, the only difference is that the fourth heat exchanger 18 in the path works as an evaporator to ensure the temperature condition of the fresh air supply.

[0134] Exhaust duct: The flow path is the same as the second state of mode A.

[0135] In cooling mode, mode D:

[0136] Reference Fig.10 The first on-off valve 191 and the fourth on-off valve 194 are connected, and the second on-off valve 192, the third on-off valve 193 and the fifth on-off valve 195 are disconnected, so that the third heat exchanger 17 and the fourth heat exchanger 18 are connected in the refrigerant circuit, the sixth on-off valve 196 is disconnected, and the first heat exchanger 13 and the second heat exchanger 14 are disconnected in the refrigerant circuit.

[0137] Refrigerant circuit: exhaust port of compressor 11 → fourth on-off valve 194 → fourth heat exchanger 18 (condenser), third electronic expansion valve 153 → third heat exchanger 17 (evaporator) → first on-off valve 191 → gas-liquid separator 16 → intake port of compressor 11.

[0138] Reference Figure 3 , fresh air duct: fresh air → fresh air inlet OA → front air valve switching device 410 → first heat exchanger 13 (not working) → first adsorption module 310 → third heat exchanger 17 (evaporator) → rear air valve switching device 420 → blower 210 → fresh air supply port SA → into the room.

[0139] Exhaust air duct: indoor air → indoor return air outlet RA → front air valve switching device 410 → second heat exchanger 14 (not working) → second adsorption module 320 → fourth heat exchanger 18 (condenser) → rear air valve switching device 420 → exhaust fan 220 → indoor exhaust outlet EA → exhaust to the outside.

[0140] Mode D is suitable for low heat load conditions, and the wet load basically meets the comfort conditions.

[0141] [Heating mode]

[0142] Mode E of heating mode:

[0143] Reference Figure 7 , which corresponds to mode A of the cooling mode. The difference from mode A is that the state of the four-way valve is opposite, so that the heat exchanger used as an evaporator in mode A is used as a condenser in mode E.

[0144] In mode E, the first heat exchanger 13 and the second heat exchanger 14 are in communication, and the third heat exchanger 17 and the fourth heat exchanger 18 are disconnected.

[0145] Mode E is the basic heating mode, which ensures the heating and humidification functions.

[0146] Mode F for heating mode:

[0147] Reference Figure 8 , which corresponds to mode B of the refrigeration mode. The difference from mode B is that the states of the four-way valve, the first on-off valve 191, the second on-off valve 192, the third on-off valve 193, and the fourth on-off valve 194 are opposite, so that the heat exchanger used as an evaporator in mode B is used as a condenser in mode F.

[0148] In mode F, the first heat exchanger 13 , the second heat exchanger 14 , the third heat exchanger 17 , and the fourth heat exchanger 18 are all in communication.

[0149] In mode F, the regeneration of the adsorption module meets the requirements, and the temperature of the fresh air supply outlet SA needs to be further adjusted by the auxiliary heat exchanger.

[0150] The first state of mode G in heating mode:

[0151] Reference Fig.11 As shown in the left side view, the third on-off valve 193 and the fifth on-off valve 195 are connected, so that the third heat exchanger 17 is connected in the refrigerant circuit; the sixth on-off valve 196 is connected, so that the first heat exchanger 13 and the second heat exchanger 14 are connected in the refrigerant circuit.

[0152] Refrigerant circuit: The exhaust port of the compressor 11 is divided into two routes, one route is → de channel of the four-way valve 12 → first heat exchanger 13 (condenser) → first electronic expansion valve 151, and the other route is → third on-off valve 193 → third heat exchanger 17 (condenser) → fifth on-off valve 195, and then the two routes merge → second electronic expansion valve 152 → second heat exchanger 14 (evaporator) → cs channel of the four-way valve → gas-liquid separator 16 → air intake port of the compressor 11.

[0153] The flow paths of the fresh air duct and the exhaust air duct are as follows Figure 3 As shown, the third heat exchanger 17 works as a condenser to ensure the temperature conditions of fresh air supply. At this time, the overall capacity is slightly weaker than mode B.

[0154] The second state of mode G in cooling mode:

[0155] Reference Fig.11 In the right side view, the four-way valve 12 switches state so that the functions of the first heat exchanger 13 and the second heat exchanger 14 are interchanged.

[0156] The fourth on-off valve 194 and the fifth on-off valve 195 are connected, and the first on-off valve 191, the second on-off valve 192, and the third on-off valve 193 are disconnected, so that the fourth heat exchanger 18 is connected in the refrigerant circuit and the third heat exchanger 17 is disconnected.

[0157] Refrigerant circuit: The exhaust port of the compressor 11 is divided into two routes, one is → dc channel of the four-way valve 12 → second heat exchanger 14 (condenser) → second electronic expansion valve 152, and the other is → fourth on-off valve 194 → fourth heat exchanger 18 (condenser) → fifth on-off valve 195, and then the two routes merge → first electronic expansion valve 151 → first heat exchanger 13 (evaporator) → es channel of the four-way valve → gas-liquid separator 16 → suction port of the compressor 11.

[0158] Reference Figure 4 , the air valve switching device 400 is switched to the second state, so that the first air processing chamber 111 is connected to the exhaust air duct, and the second air processing chamber 112 is connected to the fresh air duct.

[0159] The flow paths of the fresh air duct and the exhaust air duct are as follows Figure 4 As shown, the fourth heat exchanger 18 works as a condenser to ensure the temperature conditions of the fresh air supply.

[0160] In mode G, the regeneration of the adsorption module basically meets the requirements, and the temperature of the fresh air supply outlet SA needs to be further adjusted by the auxiliary heat exchanger, and the capacity is weaker than that of mode F.

[0161] Mode H for heating mode:

[0162] Reference Fig.12 , the first on-off valve 191 and the fourth on-off valve 194 are disconnected, the second on-off valve 192 and the third on-off valve 193 are connected, the third heat exchanger 17 is used as a condenser, and the fourth heat exchanger 18 is used as an evaporator. The sixth on-off valve 196 is disconnected, so that the first heat exchanger 13 and the second heat exchanger 14 are disconnected.

[0163] The air valve switching device is kept in the first state, and the flow paths of the fresh air duct and the exhaust air duct are as follows: Figure 3 shown.

[0164] Mode H is suitable for working conditions where the sensible heat load is not high and the latent heat load basically meets the comfort conditions.

[0165] [Ventilation Mode]

[0166] The compressor does not work, the heat exchanger does not work; the air valve switching device is in the first state.

[0167] Reference Figure 3 , fresh air duct: fresh air → fresh air inlet OA → front air valve switching device 410 → first heat exchanger 13 (not working) → first adsorption module 310 → third heat exchanger 17 (not working) → rear air valve switching device 420 → blower 210 → fresh air supply outlet SA → into the room.

[0168] Exhaust air duct: indoor air → indoor return air outlet RA → front air valve switching device 410 → second heat exchanger 14 (not working) → second adsorption module 320 → fourth heat exchanger 18 (not working) → rear air valve switching device 420 → exhaust fan 220 → indoor exhaust outlet EA → exhaust to the outside.

[0169] This mode is suitable for working conditions where the outdoor temperature and humidity are relatively comfortable and only ventilation is required.

[0170] According to the embodiments of the present application, referring to Figure 1 A vent 114 connected to the exhaust duct is provided on the fresh air duct, and a bypass air valve 500 is provided at the vent 114 for opening or closing the vent 114.

[0171] The vent 114 is disposed near the fresh air inlet OA and is located on the windward side of the front air valve switching device 410. When the bypass air valve 500 is opened, indoor air can enter the fresh air duct through the vent 114, thereby mixing indoor air with outdoor fresh air in the fresh air duct.

[0172] Specifically, a bypass air duct 113 is provided between the fresh air duct and the exhaust air duct, and one end of the bypass air duct 113 close to the fresh air duct is a vent 114 , and the bypass air valve 500 is rotatably connected to the vent 114 .

[0173] Combination Figure 2 When the bypass vent valve 500 is in a horizontal state, the vent 114 is closed; when the bypass vent valve 500 is opened at 25%, the air volume of the indoor air entering the fresh air duct is greater than the air volume when the opening is 75%; when the bypass vent valve 500 is opened at 100%, the vent is fully opened. It should be noted that the premise of the air volume comparison here is that the speed of the fan is the same.

[0174] Therefore, the amount of indoor air entering the fresh air duct can be adjusted by controlling the opening of the bypass air damper 500.

[0175] Hereinafter, signal flows between components included in the humidifier will be described.

[0176] Reference Fig.13 The humidifier includes a controller 600, a memory 610, an input unit 620 and a temperature and humidity detection device.

[0177] The controller 600 is used to control the operation of the compressor 11, the heat exchanger on-off device, the air valve switching device 400, the bypass air valve 500, the supply fan 210 and the exhaust fan 220 according to different temperature and humidity conditions.

[0178] The memory 610 is used to store programs and data related to the operation of the humidifier.

[0179] The input unit 620 is used to receive an operation command regarding the humidifier from a user.

[0180] The outdoor temperature and humidity detection device 630 is used to detect the temperature To and humidity Ho of the outdoor air. The outdoor temperature and humidity detection device 630 can be set at the fresh air inlet OA.

[0181] The indoor temperature and humidity detection device 640 is used to detect the temperature Ti and humidity Ho of the indoor air. The indoor temperature and humidity detection device 640 can be set at the indoor return air outlet RA.

[0182] The main heat exchanger in the fresh air duct is the target heat exchanger. For example, in mode A, the first heat exchanger in the first state is the target heat exchanger, and the second heat exchanger in the second state is the target heat exchanger. The air at the inlet side of the target heat exchanger, that is, the air on the windward side, is the target air.

[0183] The target air temperature and humidity detection device 650 is disposed between the front air valve switching device 410 and the bypass air valve 500, and is used to detect the temperature Tea and humidity Hea of ​​the air at the inlet side of the target heat exchanger.

[0184] The first heat exchanger temperature detection device 660 is disposed on the first heat exchanger 13 and is used to detect the surface temperature TI of the first heat exchanger 13 .

[0185] The second heat exchanger temperature detection device 670 is disposed on the second heat exchanger 14 and is used to detect the surface temperature TI of the second heat exchanger 14 .

[0186] The controller can obtain the temperature TI of the target heat exchanger based on the heat exchanger temperature and humidity detection device. When the air valve switching device 400 is in the first state, TI is obtained by the first heat exchanger temperature and humidity detection device. When the air valve switching device 400 is in the second state, TI is obtained by the second heat exchanger temperature and humidity detection device.

[0187] The dew point temperature Tdea of ​​the target air can be calculated from the temperature Tea and humidity Hea of ​​the target air. The target dew point temperature Tdea is compared with the temperature TI of the target heat exchanger: when Tdea is less than the difference between TI and the preset deviation value, the condensation risk is low; otherwise, the condensation risk is high, the bypass air valve is opened, and the indoor air enters the fresh air duct and mixes with the fresh air. At this time, the target air becomes mixed air.

[0188] For example, when the outdoor air temperature is high, Tdea is relatively large and condensation is easy to occur. At this time, the lower temperature indoor air enters the fresh air duct, which can reduce the Tdea value and thus reduce the risk of condensation.

[0189] Therefore, the present application implements anti-condensation control by monitoring the temperature of the target air.

[0190] The control process of the humidifier is introduced in detail below.

[0191] Reference Fig.14 After the humidifier is turned on, the supply fan and the exhaust fan operate at the default standard wind speed, the air valve switching device 400 operates in the first state, and the bypass air valve is in the closed state.

[0192] The dew point temperature Tdea of ​​the target air is calculated based on the acquired temperature and humidity of the target air.

[0193] Control the working mode of the humidifying and dehumidifying machine according to the interval in which the temperature Tea of the target air is located. Specifically, when the fourth preset temperature value ≤ Tea ≤ the fifth preset temperature value, for example, the fourth preset temperature value = 18 °C and the fifth preset temperature value = 28 °C, that is, 18 °C ≤ Tea ≤ 28 °C, the temperature is relatively moderate and the ventilation mode is entered; when Tea is greater than the fifth preset temperature value, that is, Tea > 28 °C, the temperature is relatively high and the refrigeration mode is entered; when Tea is less than the fourth preset temperature value, that is, Tea < 18 °C, the temperature is relatively low and the heating mode is entered.

[0194] In this application, the corresponding working mode can be automatically entered according to the temperature of Tea. In other embodiments, the working mode can also be selected by the user, and the controller receives the working mode input by the user and then directly enters.

[0195] [Ventilation mode]

[0196] Refer to Fig.15 , after the ventilation mode is started, it is judged whether the humidity Hea of the target air > the second preset humidity value is established; for example, the second preset humidity value = 75%, if Hea ≤ 75%, it means that the humidity of the target air is not large, the bypass air valve remains closed, and mode I is executed, and the humidifying and dehumidifying machine only performs air exchange without temperature and humidity adjustment.

[0197] If Hea > 75%, it means that the humidity of the target air is relatively large, and the step of judging whether there is a condensation risk is entered, that is, it is judged whether Tdea < TI - 2 °C is established. 2 °C is an example of the preset deviation value. Considering the influence of the pressure drop, a preset deviation value is set in this application. In other embodiments, the preset deviation value can also be equal to zero, that is, Tdea and TI are directly compared.

[0198] When Tdea < TI - 2 °C, it means that there is no condensation risk, and the bypass air valve is in the closed state; when Tdea ≥ TI - 2 °C, it means that there is a condensation risk, and the bypass air valve is opened to the first opening degree for air mixing.

[0199] The wind speeds of the air supply fan and the exhaust fan can be increased. For example, the fan wind speed can be increased to make the air supply volume Fs * 1.1, where Fs is the standard air volume. Increasing the air volume can, on the one hand, ensure the fresh air volume introduced into the room, and on the other hand, can reduce the dew point temperature Tdea of the target air and further prevent condensation.

[0200] After the adjustment of the bypass air valve is completed, compare the magnitudes of the indoor air temperature Ti and the outdoor air temperature To.

[0201] When Ti < To, it indicates that the outdoor temperature is slightly higher, and at the same time the humidity of the target air is relatively high (Hea > 75%), and it enters Mode A to perform basic refrigeration and dehumidification on the target air; when Ti ≥ To, it indicates that the outdoor air temperature is slightly lower, and it enters Mode H to raise the temperature of the target air, and the relative humidity Hea will decrease during the temperature rise.

[0202] After running in the current mode for a preset time, such as 30 minutes, it re-enters the step of calculating the dew point temperature Tdea of the target air based on the obtained temperature and humidity of the target air.

[0203] [Refrigeration Mode]

[0204] Refer to Fig.16 , after entering the refrigeration mode, the compressor starts at the preset default frequency, and the default state of the four-way valve makes the first heat exchanger an evaporator and the second heat exchanger a condenser.

[0205] S100. Determine whether Tea is greater than the sixth preset temperature holds. For example, the sixth preset temperature = 31°C, that is, whether Tea > 31°C holds; if not, then Tea ≤ 31°C, indicating that the temperature condition is slightly higher than the comfortable temperature, and it enters S110; if it holds, it indicates that the temperature of the target air is relatively high, and it enters S120.

[0206] S110. Determine whether the dew point temperature Tdea of the target air is less than the difference between the temperature of the target heat exchanger and the preset deviation value and the outdoor air humidity Ho is less than the first preset humidity value holds. If it holds, it enters S111; if not, it enters S112.

[0207] Exemplarily, the first preset humidity value = 60%, the preset deviation value = 3°C, and the preset deviation value in the refrigeration mode can be slightly larger than that in the ventilation mode because the condensation risk in the refrigeration mode is greater than that in the ventilation mode.

[0208] S111. Control the bypass air valve to be in the closed state and execute Mode D.

[0209] When Tdea < TI - 3°C and Ho < 60%, it indicates that there is no condensation risk and there is no need for mixed air to reduce the condensation risk; at the same time, the humidity of the outdoor air is relatively appropriate and there is no need for dehumidification. Therefore, Mode D can be performed. The first heat exchanger and the second heat exchanger are disconnected in the refrigerant circuit, and the third heat exchanger and the fourth heat exchanger are connected to only perform temperature adjustment.

[0210] In addition, in step S111, the compressor can operate at the first preset frequency. Exemplarily, the first preset frequency = Fmin + 5Hz, where Fmin represents the lowest frequency in the compressor operating frequency range. Since Tea < 31°C and the temperature is slightly high, the compressor operates at a low frequency to meet the cooling demand.

[0211] In this application, when the target air temperature is slightly higher, there is no risk of condensation and the humidity is more suitable, mode D is executed and the compressor is controlled to operate at a low frequency. This not only meets the temperature and humidity requirements during air supply, but also avoids energy waste.

[0212] S112, control the bypass vent valve to be fully opened, that is, the opening degree is 100%, and execute mode A.

[0213] When Tdea≥TI-3℃ and Ho≥60%, the target heat exchanger temperature is lower than the dew point temperature of the target air or the outdoor air humidity is high, and the bypass damper is fully opened, the relative humidity of the target air can be quickly reduced. Executing mode A for basic dehumidification can meet the temperature and humidity requirements of the supply air.

[0214] S120, determining whether the dew point temperature Tdea of ​​the target air is less than the difference between the temperature of the target heat exchanger and the preset deviation value. If so, it indicates that there is no condensation risk, and then proceed to S121; if not, it indicates that there is a condensation risk, and then proceed to S122.

[0215] S121. Determine whether the sum of the absolute humidity content Di of the indoor air and the preset tolerance value is greater than the absolute humidity content Dea of ​​the target air. If so, it means that the humidity content of the target air is not large, and then proceed to S1211. If not, it means that the humidity content of the target air is relatively large, and then proceed to S1212.

[0216] S1211, control the bypass vent valve to close and execute the first state of mode B.

[0217] When the moisture content of the target air is not large, only cooling is required. The first state of execution mode B is performed, and the four-way valve and the air valve switching device do not need to switch states. The first heat exchanger and the third heat exchanger (evaporator) are both in working state. Compared with the operation of one evaporator, the heat exchange area is increased, the heat exchange efficiency is improved, and the temperature of the target air quickly meets the comfort requirements.

[0218] S1212, control the bypass vent valve to close and execute mode B.

[0219] When the target air has a high humidity content, it needs to be cooled and dehumidified. Under this condition, executing mode B can increase the speed of cooling and dehumidification.

[0220] In addition, in step S1211, the compressor may operate at a fifth preset frequency, and in step S1212, the compressor may operate at a fourth preset frequency. For example, the fifth preset frequency is Fmin+25 Hz, the fourth preset frequency is Fmin+20 Hz, and the fifth preset frequency is slightly higher than the fourth preset frequency. The compressor operates at a low frequency to avoid a large amount of condensed water.

[0221] S122, determining whether the humidity Hea of ​​the target air is greater than a third preset humidity value, if so, proceeding to S1221; if not, proceeding to S1222.

[0222] S1221, control the bypass vent valve to open to a first opening degree, for example, 25%, and execute mode C.

[0223] Exemplarily, the third preset humidity value = 80%, Hea>80%, indicating that the fresh air is in an extremely high humidity condition, and the bypass air valve is opened with a first smaller opening. At this time, more indoor air is mixed in the target air, while the amount of fresh air is relatively small, so a small amount of fresh air is introduced.

[0224] Since the fresh air is in a high-humidity condition, the regeneration of the adsorption module needs to be accelerated to enable the adsorption module to fully absorb moisture. If mode B is executed and the dual condensers are working, part of the heat will be taken away by the auxiliary condenser, resulting in the inability to fully utilize the condensation heat to regenerate the adsorption module; when the adsorption module regenerates faster, the average temperature of the adsorption module will rise faster, and the air temperature on the air outlet side of the adsorption module will rise, so the evaporator on the air outlet side of the adsorption module is needed to adjust the air outlet temperature. In this condition, mode C, in which two evaporators work and one condenser work, can both improve the moisture absorption efficiency of the adsorption module and ensure the air supply temperature.

[0225] S1222, control the bypass vent valve to open to a second opening degree, for example, 75%, and execute mode C.

[0226] The second opening is smaller than the first opening. At this time, the target air is mixed with less indoor air, while the amount of fresh air is relatively large, so a large amount of fresh air is introduced.

[0227] Under this working condition, Hea≤80%. Although the humidity of the fresh air is not as high as that in step S1221, this step introduces more fresh air than S1221. Mode C is still executed to improve the moisture absorption efficiency of the adsorption module to further prevent condensation on the air outlet side.

[0228] In addition, in step S1221, the air blower increases the speed to the fourth preset speed, for example, at the fourth speed, the air volume is Fs*1.2; in step S1222, the air blower increases the speed to the third preset speed, for example, at the third speed, the air volume is Fs*1.1.

[0229] Since in step S1221, the proportion of fresh air in the mixed air is relatively small, and in step S1222, the proportion of fresh air in the mixed air is relatively large, the fourth preset speed can be made higher than the third preset speed to speed up the introduction of fresh air in step S1221. Moreover, the high wind speed can reduce the dew point temperature and further prevent condensation.

[0230] In step S1221, the compressor operates at a second preset frequency, for example, the second preset frequency is Fmin+10Hz; in step S1222, the compressor operates at a third preset frequency higher than the second preset frequency, for example, the third preset frequency is Fmin+15Hz. The air humidity in S1221 is greater than that in S1222, and the risk of condensation is greater. The compressor frequency in S1221 is slightly lower. The compressor operates at a low frequency to avoid the generation of a large amount of condensed water.

[0231] After the current mode runs for a preset time, such as 30 minutes, the step of calculating the target air dew point temperature is re-entered.

[0232] [Heating mode]

[0233] Reference Fig.17 After entering the heating mode, the compressor starts at a preset default frequency. The default state of the four-way valve during heating startup is opposite to that during cooling startup, so that the first heat exchanger is a condenser and the second heat exchanger is an evaporator.

[0234] In heating mode, different working modes are executed according to the temperature range of the Tea.

[0235] S310. When the target air temperature Tea∈(-∞, the first preset temperature value), execute mode E, the compressor operates at the fifth preset frequency, the bypass air valve is opened according to the first opening degree, and the fan operates at the first preset speed. Wherein, (-∞, the first preset temperature value) is the first preset interval.

[0236] Exemplarily, the first preset temperature value = 0°C. Tea∈(-∞, 0°C), the outdoor air temperature is extremely low. To avoid condensation when the indoor and outdoor air are mixed, the bypass damper is opened at a smaller angle, the fresh air volume in the target air accounts for a small proportion, and the fan speed is relatively low, so that the target air can be fully in contact with the condenser. Execution mode E performs basic heating and humidification to make the temperature and humidity of the target air meet the requirements.

[0237] S320: When the target air temperature Tea∈[first preset temperature value, second preset temperature value), execute mode F, the compressor operates at a third preset frequency, the bypass air valve is fully opened, and the fan operates at a second preset speed. [first preset temperature value, second preset temperature value) is a second preset interval.

[0238] Exemplarily, the second preset temperature value = 6°C, Tea∈[0°C, 6°C). Under this operating condition, the temperature of the outdoor air is higher than the first preset range, but it is still a relatively low temperature overall. At this time, the opening of the bypass air valve and the speed of the fan can be greater than the first preset range. The proportion of fresh air in the target air increases, and mode F is executed. All four heat exchangers work, which can increase the heating and humidification speed of the target air.

[0239] S330: When the target air temperature Tea∈[second preset temperature value, third preset temperature value), execute mode G, the compressor operates at the second preset frequency, the bypass air valve is opened according to the second opening degree, and the fan operates at the third preset speed. [second preset temperature value, third preset temperature value) is the third preset interval.

[0240] Exemplarily, the third preset temperature value = 12°C, Tea∈[6°C, 12°C). Under this operating condition, the temperature of the outdoor air is higher than the second preset range. At this time, the opening of the bypass air valve and the speed of the fan can be greater than the second preset range, and the proportion of fresh air in the target air can be increased.

[0241] S340. When the target air temperature Tea∈[third preset temperature value, fourth preset temperature value), continue to determine whether the target air humidity Hea is greater than the third preset humidity value. If so, proceed to S341; if not, proceed to S342.

[0242] S341, executing mode H, the compressor operates at a first preset frequency, and the bypass vent valve is in a closed state.

[0243] Exemplarily, Tea∈[12℃, 18℃), target air humidity Hea>80% (third preset humidity value: 80%). In this environment, the target air temperature is slightly different from the indoor temperature, and the humidity is high. When the temperature is increased in execution mode H, the relative humidity will decrease.

[0244] S342, executing mode G, the compressor operates at a second preset frequency, the bypass air valve is opened according to a second opening degree, and the fan operates at a third preset speed.

[0245] Tea∈[12℃, 18℃), target air humidity Hea≤80%. In this environment, the target air temperature is slightly different from the indoor temperature, the humidity is not high, and the bypass damper is opened to recover part of the indoor air heat.

[0246] Among them, the first preset temperature (0℃)<the second preset temperature (6℃)<the third preset temperature (12℃)<the fourth preset temperature (18℃), the second preset frequency (Fmin+10Hz)<the third preset frequency (Fmin+15Hz)<the fifth preset frequency (Fmin+25Hz), the first preset speed (Fs*0.8)<the second preset speed (Fs*0.9)<the standard speed (Fs)<the third preset speed (Fs*1.1).

[0247] The lower the target air temperature Tea value is, the lower the outdoor fresh air temperature is and the higher the frequency of compressor operation is. The target air temperature can be raised as soon as possible to avoid the introduction of low-temperature fresh air from lowering the indoor temperature.

[0248] If the low-temperature fresh air is directly sent to the condenser side, the processing efficiency of the adsorption module regeneration will be relatively low. Opening the bypass air valve can mix the indoor air and the fresh air. After the mixing, the enthalpy value and temperature will increase, and the overall energy efficiency of the system will be improved.

[0249] The lower the temperature, the higher the probability of condensation occurring when fresh air and indoor air mix after the bypass damper is opened. Therefore, the lower the Tea value, the smaller the opening of the bypass damper and the lower the fan speed, which reduces the amount and speed of fresh air introduced.

[0250] After the current mode runs for a preset time, such as 30 minutes, the step of calculating the target air dew point temperature is re-entered.

[0251] In the present application, the temperature and humidity of the target air at the inlet side of the heat exchanger in the fresh air duct are used as control points to monitor and adjust the condensation of the device, thereby reducing the risk of condensation in the air inside the machine.

[0252] In the present application, a vent connected to the exhaust duct is provided on the fresh air duct. When there is a risk of condensation, the vent is opened by a bypass air valve to lower the dew point temperature of the target air by mixing the air, thereby achieving humidity control above the dew point temperature.

[0253] In the present application, since the mixed air operation will cause the target air temperature to change, determining the working mode of the device by the temperature range of the target air temperature rather than the outdoor air temperature will make the system control more accurate.

[0254] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0255] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A humidity control machine, characterized in that: include: A shell body, in which a fresh air duct and an exhaust air duct are arranged; The adsorption module comprises a first adsorption module and a second adsorption module, wherein one of the first adsorption module and the second adsorption module is located in the fresh air duct and the other is located in the exhaust air duct; A heat exchanger, comprising a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, wherein the first heat exchanger is located on the windward side of the first adsorption module, the third heat exchanger is located on the windward side of the first adsorption module, the second heat exchanger is located on the windward side of the second adsorption module, and the fourth heat exchanger is located on the windward side of the second adsorption module; A heat exchanger on-off device, connected to the refrigerant circuit of the humidifier, for controlling the on-off of the heat exchanger in the refrigerant circuit; A bypass air valve is arranged near the air inlet side of the fresh air duct, and is used to connect or disconnect the fresh air duct and the exhaust air duct; Among them, the heat exchanger located in the fresh air duct of the first heat exchanger and the second heat exchanger is taken as the target heat exchanger, and the air at the inlet side of the target heat exchanger is taken as the target air; The humidifier further comprises: a controller, which is used for: When the dew point temperature of the target air is not less than the difference between the temperature of the target heat exchanger and a preset value, the bypass air valve is controlled to open so that the indoor air in the exhaust air duct enters the fresh air duct.

2. The humidity control machine according to claim 1, characterized in that: The controller is used to: In the cooling mode, under the condition that the temperature of the target air is not greater than the sixth preset temperature, it is determined whether the dew point temperature of the target air is less than the difference between the temperature of the target heat exchanger and the preset value, and whether the outdoor air humidity is less than the first preset humidity. If it is established, the bypass vent valve is controlled to be closed, and mode D is executed: the third heat exchanger and the fourth heat exchanger are connected, and the first heat exchanger and the second heat exchanger are disconnected; If not, the bypass vent valve is controlled to open, and mode A is executed: the first heat exchanger and the second heat exchanger are connected, and the third heat exchanger and the fourth heat exchanger are disconnected.

3. The humidity control machine according to claim 1, characterized in that: The controller is used to: In the cooling mode, when the temperature of the target air is greater than the sixth preset temperature and the dew point temperature of the target air is not less than the difference between the temperature of the target heat exchanger and the preset value, it is determined whether the relative humidity of the target air is greater than the third preset humidity value. If so, the first operating state is entered: the bypass air valve is controlled to be opened to the first opening degree; if not, the second operating state is entered: the bypass air valve is controlled to be opened to the second opening degree; Among them, under the same wind speed, the fresh air volume in the target air at the first opening degree is smaller than the fresh air volume at the second opening degree.

4. The humidity control machine according to claim 3, characterized in that: The controller is used to: In the first operating state, mode C is executed: the first heat exchanger is connected to the second heat exchanger, the third heat exchanger is connected to the heat exchanger located in the fresh air duct of the fourth heat exchanger, and the compressor is controlled to operate at the second preset frequency, and the speed of the fan in the humidifier is operated at the fourth preset speed; In the second operating state, mode C is executed, and the compressor is controlled to operate at a third preset frequency higher than the second preset frequency, and the speed of the fan is controlled to operate at a third preset speed lower than the fourth preset speed.

5. The humidity control machine according to claim 1, characterized in that: The controller is used to: In the cooling mode, when the temperature of the target air is greater than the sixth preset temperature and the dew point temperature of the target air is less than the difference between the temperature of the target heat exchanger and the preset value, it is determined whether the sum of the absolute humidity of the indoor air and the preset humidity deviation value is greater than the absolute humidity of the target air. If yes, the bypass air valve is controlled to be in a closed state, and the first state of mode B is executed: all heat exchangers are connected, the four-way valve in the refrigerant circuit remains in the current state, and the air valve switching device does not switch the state; If not, the bypass air valve is controlled to be in a closed state, and mode B is executed: all heat exchangers are connected, and the four-way valve and the air valve switching device switch their states according to the preset switching conditions.

6. The humidity control machine according to claim 1, characterized in that: The controller is used to: In the ventilation mode, it is determined whether the relative humidity of the target air is greater than the second preset humidity value. If not, the bypass air valve is controlled to remain in a closed state, and mode I is executed: the compressor is in a closed state, and the air valve switching device is maintained in the first state; if yes, the bypass air valve control step is entered: It is determined whether the dew point temperature of the target air is less than the difference between the temperature of the target heat exchanger and the preset value. If so, the bypass vent valve is closed; if not, the bypass vent valve is controlled to open.

7. The humidity control machine according to claim 6, characterized in that: The controller is used to: After the control step of the bypass air damper, the indoor air temperature is compared with the outdoor air temperature; If the indoor air temperature is lower than the outdoor air temperature, cooling mode A is executed: the first heat exchanger and the second heat exchanger are connected, and the third heat exchanger and the fourth heat exchanger are disconnected; If the indoor air temperature is not less than the outdoor air temperature, the heating mode H is executed: the third heat exchanger and the fourth heat exchanger are connected, and the first heat exchanger and the second heat exchanger are disconnected.

8. The humidity control machine according to claim 1, characterized in that: The controller is used to: In the heating mode, if the target air temperature is not less than the third preset temperature and less than the fourth preset temperature, it is determined whether the relative humidity of the target air is greater than the first preset humidity. If so, mode H is executed: the third heat exchanger and the fourth heat exchanger are connected, the first heat exchanger and the second heat exchanger are disconnected, and the bypass air valve is controlled to be disconnected; if not, mode G is executed: the first heat exchanger and the second heat exchanger are connected, the heat exchanger located in the fresh air duct of the third heat exchanger and the fourth heat exchanger is connected, and the bypass air valve is controlled to be opened.

9. The humidity control machine according to claim 1, characterized in that: The controller is used to: In the heating mode, if the target air temperature is not less than the second preset temperature and less than the third preset temperature, the mode G is executed, and the bypass air valve is controlled to open to the second opening degree; If the target air temperature is not less than the first preset temperature and less than the second preset temperature, then executing mode F: all heat exchangers are connected, and the bypass air valve is controlled to open to a third opening degree; If the target air temperature is lower than the first preset temperature, mode E is executed: the first heat exchanger and the second heat exchanger are connected, the third heat exchanger and the fourth heat exchanger are disconnected, and the bypass air valve is controlled to open to a first opening degree; Among them, under the same wind speed, the fresh air volume in the target air at the first opening degree is smaller than the fresh air volume at the third opening degree, and the fresh air volume at the third opening degree is smaller than the fresh air volume at the second opening degree.

10. A method for controlling a humidity control machine, characterized in that: The humidity control machine comprises: A shell body, in which a fresh air duct and an exhaust air duct are arranged; The adsorption module comprises a first adsorption module and a second adsorption module having a moisture adsorbent, wherein one of the first adsorption module and the second adsorption module is located in the fresh air duct and the other is located in the exhaust air duct; A heat exchanger, comprising a first heat exchanger, a second heat exchanger, a third heat exchanger and a fourth heat exchanger, wherein the first heat exchanger is located on the windward side of the first adsorption module, the third heat exchanger is located on the windward side of the first adsorption module, the second heat exchanger is located on the windward side of the second adsorption module, and the fourth heat exchanger is located on the windward side of the second adsorption module; A heat exchanger on-off device, connected to the refrigerant circuit of the humidifier, for controlling the on-off of the heat exchanger in the refrigerant circuit; A bypass air valve is arranged near the air inlet side of the fresh air duct, and is used to connect or disconnect the fresh air duct and the exhaust air duct; Among them, the heat exchanger located in the fresh air duct of the first heat exchanger and the second heat exchanger is taken as the target heat exchanger, and the air at the inlet side of the target heat exchanger is taken as the target air; The control method includes: determining whether the dew point temperature of the target air is less than the difference between the temperature of the target heat exchanger and a preset value; if not, determining that there is a condensation risk, and controlling the bypass air valve to open so that the indoor air in the exhaust air duct enters the fresh air duct.

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