Humidifying machine and control method thereof

Abstract

The invention discloses a humidifying machine and a control method thereof, and belongs to the technical field of air treatment. The humidifying machine comprises a shell, an air duct cavity and an electric appliance cavity are formed in the shell, and the electric appliance cavity is communicated with the air duct cavity; the electric appliance box is arranged in the electric appliance cavity, and a cooling fan is arranged on the electric appliance box; the fan is arranged in the air duct cavity, and under the action of the fan and / or the cooling fan, cooling airflow in the electric appliance box flows to the air duct cavity through the electric appliance cavity; the control method comprises the following steps: acquiring the temperature in the electric appliance box; and when the temperature in the electric appliance box is not smaller than the first preset value, the cooling fan is started. Heat dissipation is carried out through linkage of the heat dissipation fan and the draught fan, and the effective heat dissipation requirement of the electric appliance box is guaranteed.

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 can achieve the functions of dehumidification and humidification at the same time. The internal components of the device are compactly arranged, and there are many electrical components connected, which requires a large amount of heat dissipation. Simply relying on the internal negative pressure airflow cannot dissipate the heat in the electrical box out of the device in time, which greatly reduces the service life of the product. Summary of the invention

[0003] The present application provides a humidifier and a control method thereof, which performs heat dissipation through the linkage of a heat dissipation fan and a blower, thereby ensuring the effective heat dissipation requirement of an electrical box.

[0004] In one aspect of the present application, a humidifier includes: a shell, which is formed with an air duct cavity and an electrical cavity, and the electrical cavity is connected to the air duct cavity; an electrical box, which is arranged in the electrical cavity, and a cooling fan is provided on the electrical box; a fan, which is arranged in the air duct cavity, and under the action of the fan and / or the cooling fan, the heat dissipation air flow in the electrical box flows through the electrical cavity to the air duct cavity; a temperature sensor, which is used to detect the temperature in the electrical box; and a controller, which is used to control the cooling fan to turn on when the detection value of the temperature sensor is not less than a first preset value.

[0005] In another aspect of the present application, a humidity control machine includes: a housing, on which a fresh air inlet, a fresh air supply outlet, an indoor air return outlet, and an indoor air exhaust outlet are provided, and a humidity processing chamber is further provided in the housing, the humidity processing chamber including a first humidity processing chamber and a second humidity processing chamber;

[0006] The air valve switching device comprises a first air valve switching device and a second air valve switching device, which are respectively arranged at two ends of the humidity processing chamber. When the two air valve switching devices are both in a first state, the first humidity processing chamber is connected to a fresh air inlet and a fresh air supply outlet to form a fresh air duct, and the second humidity processing chamber is connected to an indoor return air outlet and an indoor exhaust air outlet to form an exhaust air duct; when the two air valve switching devices are both in a second state, the second humidity processing chamber is connected to the fresh air inlet and the fresh air supply outlet to form a fresh air duct, and the first humidity processing chamber is connected to the indoor return air outlet and the indoor exhaust air outlet to form an exhaust air duct;

[0007] The air supply fan corresponds to the fresh air supply outlet setting; the exhaust fan corresponds to the indoor exhaust outlet setting;

[0008] Among them, an electrical chamber is also provided in the shell, and the electrical chamber is connected with the exhaust air duct;

[0009] The humidifier also includes: an electrical box, which is arranged in the electrical cavity, and a cooling fan is provided on the electrical box. Under the action of the cooling fan and / or the exhaust fan, the heat dissipation air flow in the electrical box flows through the electrical cavity to the exhaust duct; a temperature sensor, which is used to detect the temperature in the electrical box; and a controller, which is used to control the cooling fan to turn on when the detection value of the temperature sensor is not less than a first preset value.

[0010] In some embodiments, the controller is further used to: when the gear position of the fan is not higher than the first preset gear position, control the cooling fan to always be turned on;

[0011] In some embodiments, the controller is further used to: determine whether the detection value of the temperature sensor is not less than a first preset value, and if so, control the cooling fan to increase power; if not, control the cooling fan to reduce power.

[0012] In some embodiments, when the fan gear is higher than the first preset gear and not higher than the second preset gear, it is determined whether the detection value of the temperature sensor is not less than the first preset value. If so, the cooling fan is controlled to be turned on; if not, the cooling fan is controlled to be turned off.

[0013] In some embodiments, the controller is further used to: when the gear position of the fan is higher than a second preset gear position, control the cooling fan to turn off.

[0014] In some embodiments, the controller is used to: when the detection value of the temperature sensor is not less than a second preset value, control the cooling fan to increase the power, and after running for a preset time, if the detection value of the temperature sensor is still not less than the second preset value, alarm and shut down.

[0015] In some embodiments, the connection position between the electrical cavity and the exhaust air duct is located on the windward side of the air valve switching device; a bypass air duct and a bypass air valve are also provided in the housing, and the bypass air duct is connected between the fresh air inlet and the fresh air supply outlet; the bypass air valve is used to disconnect or connect the bypass air duct;

[0016] The controller is used to: in bypass mode, control the supply fan to turn on, the exhaust fan to turn off, the bypass air valve to open, and the first air valve switching device or the second air valve switching device to switch the state, so that the indoor return air outlet is connected to the fresh air supply outlet.

[0017] In some embodiments, the controller is further used to: enter an energy-saving control mode when the first air valve switching device or the second air valve switching device is in a switching state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of a humidity control machine according to some embodiments is shown;

[0019] Figure 2 An air flow path diagram of a humidifier in a first state according to some embodiments is shown;

[0020] Figure 3 An air flow path diagram of a humidifier in a second state according to some embodiments is shown;

[0021] Figure 4 A transverse cross-sectional view of an upper portion of a humidity control machine according to some embodiments is shown;

[0022] Figure 5 A perspective view of an electrical box of a humidifier according to some embodiments is shown;

[0023] Figure 6 An air flow path diagram showing a bypass mode of a humidifier according to some embodiments;

[0024] Figure 7 An air flow path diagram of a bypass mode of a humidifier according to other embodiments is shown;

[0025] Figure 8 An air flow path diagram of a bypass mode of a humidifier according to still other embodiments is shown;

[0026] Fig. 9 A flow chart showing energy-saving control of a humidifier according to some embodiments is shown;

[0027] Fig.10 A flowchart of abnormal alarm control of a humidifier according to some embodiments is shown;

[0028] Fig.11 A control flow chart of a bypass mode of a humidifier according to some embodiments is shown;

[0029] In the above figures, 1. shell; 11a. first humidity treatment chamber; 11b. second humidity treatment chamber; 12a. indoor return air chamber; 12b. indoor return air duct; 12c. indoor exhaust air chamber; 13a. fresh air inlet chamber; 13b. fresh air inlet duct; 13c. fresh air supply chamber; 14a. compressor chamber; 14b. electrical chamber; 15a. bypass air duct; 16. connecting port; 2. adsorption component; 21. first adsorption module; 22. second adsorption module; 31. first heat exchanger; 32. second heat exchanger; 4. air valve switching device; 41. first air valve switching device; 42. second air valve switching device; 51. air supply fan; 52. exhaust fan; 6. electrical box component; 61. electrical box; 61a. heat dissipation hole; 62. heat dissipation fan; 7. bypass air valve. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The moisture in indoor air and outdoor air is transferred by the rotation of the adsorption wheel.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] The humidifier may be a vertically mounted structure, but the implementation of the present application is not limited thereto, and the present application is also applicable to a ceiling-mounted horizontal structure.

[0047] Reference Figures 1 to 3 According to the embodiment of the present application, the humidifier includes a shell 1, an adsorption component 2, a wind valve switching device 4 and a refrigerant system.

[0048] Four air vents are provided on the housing 1, namely, a fresh air inlet OA, a fresh air supply vent SA, an indoor return air vent RA, and an indoor exhaust air vent EA. In the current example, the four air vents are provided at the top of the housing 1, but the embodiments of the present application are not limited thereto, and the air vents may also be provided at the side, bottom, etc. of the housing 1.

[0049] 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.

[0050] In an embodiment of the present application, the fresh air inlet OA and the indoor return air outlet RA are located on the front side, and the fresh air supply outlet SA and the indoor exhaust air outlet EA are located on the back side. At the same time, the fresh air inlet OA and the indoor return air outlet RA are arranged on the left and right, and the indoor exhaust air outlet EA and the fresh air supply outlet SA are arranged on the left and right.

[0051] The top of the humidifier is formed with a fresh air inlet cavity 13a corresponding to the fresh air inlet OA, an indoor return air cavity 12a corresponding to the indoor return air cavity RA, a fresh air supply cavity 13c corresponding to the fresh air supply cavity SA, and an indoor exhaust cavity 12c corresponding to the indoor exhaust cavity RA.

[0052] Two air valve switching devices 4 are arranged in an up-and-down manner in the housing 1, and a humidity processing chamber is formed between the two air valve switching devices 4. The humidity processing chamber includes a first humidity processing chamber 11a and a second humidity processing chamber 11b arranged on the left and right.

[0053] The air valve switching device 4 includes a first air valve switching device 41 located at the bottom and a second air valve switching device 42 located at the top.

[0054] The indoor exhaust chamber 12c and the fresh air supply chamber 13c are located above the second air valve switching device 42, and the indoor return air duct 12b and the fresh air inlet duct 13b are located on the left and right below the first air valve switching device 41. The indoor return air duct 12b is connected to the indoor return air chamber 12a, and the fresh air inlet duct 13b is connected to the fresh air inlet chamber 13a.

[0055] The air valve switching device 4 can have two states, one is a first state of parallel channels, and the other is a second state of cross channels.

[0056] Combination Figure 2 When the first air valve switching devices 41 are all in the parallel channel state, the indoor return air duct 12b is connected to the second humidity processing chamber 11b, and the fresh air inlet duct 13b is connected to the first humidity processing chamber 11a. When the second air valve switching devices 42 are all in the parallel channel state, the second humidity processing chamber 11b is connected to the indoor exhaust chamber 12c, and the first humidity processing chamber 11a is connected to the fresh air supply chamber 13c.

[0057] Therefore, when the air valve switching devices 4 are all in the first state, the fresh air inlet OA, the fresh air inlet chamber 13a, the fresh air inlet duct 13b, the first humidity treatment chamber 11a, the fresh air supply chamber 13c, and the fresh air supply port SA are connected to form a fresh air duct, and the indoor return air port RA, the indoor return air chamber 12a, the indoor return air duct 12b, the second humidity treatment chamber 11b, the indoor exhaust chamber 12c, and the indoor exhaust duct are connected to form an exhaust duct.

[0058] Combination Figure 2 When the first air valve switching device 41 is in the cross-channel state, the indoor return air duct 12b is connected to the first humidity processing chamber 11a, and the fresh air inlet duct 13b is connected to the second humidity processing chamber 11b. When the second air valve switching device 42 is in the cross-channel state, the first humidity processing chamber 11a is connected to the indoor exhaust chamber 12c, and the second humidity processing chamber 11b is connected to the fresh air supply chamber 13c.

[0059] Therefore, when the air valve switching devices 4 are all in the second state, the fresh air inlet OA, the fresh air inlet chamber 13a, the fresh air inlet duct 13b, the second humidity treatment chamber 11b, the fresh air supply chamber 13c, and the fresh air supply outlet SA are connected to form a fresh air duct, and the indoor return air outlet RA, the indoor return air chamber 12a, the indoor return air duct 12b, the first humidity treatment chamber 11a, the indoor exhaust chamber 12c, and the indoor exhaust outlet EA are connected to form an exhaust duct.

[0060] The adsorption assembly 2 includes a first adsorption module 21 and a second adsorption module 22 .

[0061] The refrigerant system includes a compressor, a four-way valve, an expansion valve, a first heat exchanger 31 and a second heat exchanger 32 .

[0062] The first heat exchanger 31 corresponds to the lower part of the first adsorption module 21 , and the second heat exchanger 32 corresponds to the lower part of the second adsorption module 22 .

[0063] The first heat exchanger 31 and the first adsorption module 21 form a first humidity control component located in the first humidity processing chamber 11a, and the second heat exchanger 32 and the second adsorption module 22 form a second humidity control component located in the second humidity processing chamber 11b.

[0064] The cooling and heating principles of the refrigerant system of the present application are the same as those of the air conditioning system and will not be described in detail here.

[0065] The humidifier also includes a blower 51 and an exhaust fan 52. The blower 51 is installed in the fresh air supply cavity 13c corresponding to the fresh air supply outlet SA, and is used to drive the air flow in the fresh air duct. The exhaust fan 52 is installed in the indoor exhaust cavity 12c corresponding to the indoor exhaust outlet EA, and is used to drive the air flow in the exhaust duct.

[0066] In some embodiments of the present application, reference is made to Figure 4 A bypass air duct 15a is also provided in the shell 1, and the bypass air duct 15a directly connects the fresh air inlet chamber 13a and the fresh air supply chamber 13c.

[0067] Specifically, a bypass air valve 7 is provided on the bypass air duct 15a. When the bypass air valve 7 is closed, the bypass air duct 15a is disconnected; when the bypass air valve is opened, under the action of the air supply fan 51, outdoor fresh air flows along the fresh air inlet OA, the fresh air inlet cavity 13a, the bypass air duct 15a, the fresh air supply cavity 13c, and enters the room from the fresh air supply port SA.

[0068] Therefore, the humidifier of the present application also has a bypass mode. In the bypass mode, the air supply fan 51 is working, the exhaust fan 52 is not working, and the fresh air directly enters the room from the bypass air duct 15a.

[0069] In some embodiments of the present application, the housing 1 further includes a press chamber 14a and an electrical chamber 14b.

[0070] The fresh air duct and the return air duct constitute the air duct cavity of the humidifier. The compressor cavity 14a and the electrical cavity 14b are separated from the air duct cavity and can be arranged below the air duct cavity.

[0071] The compressor chamber 14 a is used to accommodate the compressor, four-way valve and electronic expansion valve of the refrigerant system, and the electrical chamber 14 b is used to accommodate the electrical box assembly 6 .

[0072] Reference Figure 5 The electrical box assembly 6 includes an electrical box 61 and a cooling fan 62 .

[0073] The electrical box 61 is in a rectangular box shape, a cooling fan 62 is installed on the rear wall of the electrical box 61, and cooling holes 61a are provided on the left and right side walls of the electrical box 61. Under the action of the cooling fan 62, the cooling airflow in the electrical box 61 flows out from the cooling holes 61a.

[0074] Specifically, a vent is provided on the rear wall forming the electrical cavity 14 b , and the vent may be opposite to the heat dissipation fan 62 , so that the airflow outside the humidifier may enter the electrical box 61 through the vent and the heat dissipation fan 62 .

[0075] A communication port 16 is provided on the wall between the electrical cavity 14 b and the air duct cavity, so that the electrical cavity 14 b is connected with the air duct cavity through the communication port 16 .

[0076] Specifically, the electrical cavity 14b is connected to the indoor return air duct 12b of the exhaust air duct. Considering that the indoor ambient temperature has a smaller range of variation than the outdoor ambient temperature, the indoor air from the exhaust air duct entering the electrical cavity 14b will not cause a large temperature fluctuation in the electrical cavity 14b. Moreover, the heat dissipation airflow is discharged outdoors along the exhaust air duct, which will not affect the fresh air. In other embodiments, the electrical cavity 14b may also be connected to the fresh air duct.

[0077] When the heat dissipation fan 62 is working, it can promote the heat dissipation airflow in the electrical box 61 to enter the exhaust air duct through the heat dissipation holes 61a and the connecting port 16, and be discharged along with the indoor air in the exhaust air duct.

[0078] In addition, when the exhaust fan 52 is working, it can also promote the heat dissipation airflow of the electrical chamber 14b to flow to the exhaust air duct for discharge. Therefore, the exhaust fan 52 and the heat dissipation fan 62 can both play a role in dissipating heat from the electrical box.

[0079] Hereinafter, signal flows and control procedures between components included in the humidifier will be described.

[0080] The humidifier includes a controller, a memory and a humidity sensor. The controller is used to control the operation of the cooling fan 62 according to different temperature conditions; the memory is used to store programs and data related to the operation of the humidifier.

[0081] The temperature sensor is used to detect the temperature in the electrical box 61 , and the temperature sensor may be disposed in the electrical box 61 .

[0082] After the humidifier is started, the temperature sensor detects the temperature in the electrical box. When the detection value T of the temperature sensor is not lower than the first preset value, the cooling fan is controlled to run; when the detection value T of the temperature sensor is lower than the first preset value, the cooling fan does not run.

[0083] After the humidifier is started, the exhaust fan starts to work. At this time, the negative pressure of the exhaust duct causes the heat dissipation airflow in the electrical box 61 to flow to the exhaust duct, and air cooling and heat dissipation are formed in the electrical box 61.

[0084] If the temperature in the electrical box 61 is not lower than the first preset value, it means that the temperature in the electrical box is relatively high and the negative pressure generated by the exhaust fan cannot meet the heat dissipation demand of the electrical box. At this time, the cooling fan is turned on to dissipate heat for the electrical box.

[0085] If the temperature in the electrical box is lower than the first preset value, it means that the temperature in the electrical box is not high, and the cooling fan can be turned off to avoid energy waste and achieve the purpose of energy saving.

[0086] Since the exhaust fan of the humidifier has multiple wind gears, different wind gears have different heat dissipation effects on the electrical box. The larger the wind gear, the better the heat dissipation effect.

[0087] The inventor of the present application has concluded through temperature rise test that when the air volume inside the humidifier is large, the air volume generated by negative pressure can meet the heat dissipation requirements of the electrical box. Therefore, the present application combines the detection of the exhaust fan's windshield and temperature sensor to perform energy-saving control:

[0088] Reference Fig. 9 , determine the fan gear, if the fan gear is not higher than the first preset gear, the cooling fan is turned on.

[0089] The first preset gear is a lower gear or a silent gear of the fan. For example, the fan has three wind gears: a low wind gear, a medium wind gear and a high wind gear. The first preset gear may be the low wind gear of the fan.

[0090] If the fan is operating at a low wind speed, although the negative pressure airflow generated by the fan has a certain heat dissipation effect, since the negative pressure airflow flows slowly at low wind speed, its heat dissipation effect on the electrical box is effective, which may cause the temperature inside the electrical box to be higher than the first preset value. However, after the cooling fan is turned on, the temperature inside the electrical box will quickly drop below the first preset value, and the temperature inside the electrical box will rise again after the cooling fan stops working. This will repeat repeatedly, resulting in the problem of frequent starting and stopping of the cooling fan, which will not only affect the service life of the fan, but also cause the noise of the entire machine to fluctuate due to the starting and stopping of the fan, affecting the user experience.

[0091] Therefore, in the present application, when the working gear of the fan is not higher than the first preset gear, the cooling fan is always turned on.

[0092] According to an embodiment of the present application, when the temperature is not higher than a first preset gear, the cooling fan remains turned on when the power is turned on, and at the same time, it is determined whether the detection value of the temperature sensor is not lower than a first preset value; if the detection value of the temperature sensor is not lower than the first preset value, the power and speed of the cooling fan are increased; if the detection value of the temperature sensor is lower than the first preset value, the power and speed of the cooling fan are reduced.

[0093] In the present application, when the temperature inside the electrical box is high, the cooling fan appropriately increases its speed. When the temperature inside the electrical box is not high, the cooling fan runs at a low wind speed. This can not only ensure the heat dissipation requirements, but also avoid causing abrupt noise problems due to frequent starting and stopping of the cooling fan.

[0094] If the current gear of the fan is higher than the first preset gear, continue to determine whether the detection value of the temperature sensor is greater than the first preset value; if the detection value of the temperature sensor is not lower than the first preset value, the cooling fan is turned on; if the detection value of the temperature sensor is lower than the first preset value, the cooling fan stops running.

[0095] Because when the fan is running at a speed higher than the first preset gear, for example, when the fan is working at the medium gear, the negative pressure airflow generated by the exhaust fan can meet the heat dissipation effect for a long time. At the same time, because the wind speed at the medium gear is relatively high, it can cover up the operating noise of the cooling fan. That is to say, when the fan is running at a speed higher than the first preset gear, the human ear can no longer recognize the turning on and off of the cooling fan. Therefore, at this gear, when the temperature in the electrical box is not lower than the first preset value, the cooling fan can be turned on for auxiliary heat dissipation.

[0096] According to an embodiment of the present application, if the fan speed is higher than a second preset gear, the cooling fan is not turned on, wherein the second preset gear is higher than the first preset gear.

[0097] The fan is higher than the second preset gear, for example, the fan works at a high wind speed, and the negative pressure flow generated by the exhaust fan is sufficient to meet the heat dissipation in the electrical box. Therefore, under this condition, there is no need to turn on the cooling fan.

[0098] In some embodiments, the present application also provides a temperature rise abnormal alarm control:

[0099] Reference Fig.10 When the detection value of the temperature sensor is not lower than the second preset value, the cooling fan is controlled to increase the speed. After running for a period of time, if the detection value of the temperature sensor is still not lower than the second preset value, an alarm is issued and the machine is shut down.

[0100] In this step, if the detection value of the temperature sensor is always high, it may be that the cooling fan is damaged and the signal feedback mode is invalid, resulting in the system not recognizing the abnormality of the cooling fan. In order to eliminate the problem of false alarm caused by environmental factors such as high indoor temperature, in the control of this application, the speed of the cooling fan is first increased; if the detection value of the temperature sensor is lower than the second preset value after the cooling fan speed is increased, it means that the temperature in the electrical box has dropped and the cooling fan is not damaged; if the detection value of the temperature sensor is still not lower than the second preset value after the cooling fan speed is increased, it means that the temperature in the electrical box has not dropped due to the effect of the cooling fan, and the cooling fan can be judged to be abnormal. At this time, in order to avoid the temperature in the electrical box from continuing to rise and causing damage to electrical components or even fire and other safety problems, the system performs forced shutdown alarm processing.

[0101] In some embodiments of the present application, reference Figure 6 When the humidifier works in bypass mode, only the supply fan of the humidifier works and the exhaust fan does not work. At this time, there is no airflow passing through the exhaust duct, and a negative pressure state cannot be formed at the electrical box position.

[0102] Therefore, in bypass mode, the cooling fan is turned on, and the cooling fan dissipates heat in the electrical box. The cooling fan causes the cooling airflow to enter the indoor return air duct 12b and be discharged from the indoor return air outlet RA. However, since the indoor return air outlet RA is used for indoor air intake, when there is air discharge from the return air outlet, it will cause confusion among users, who may mistakenly think that the machine is faulty.

[0103] In order to prevent air from leaking out of the indoor return air outlet RA, the present application controls the air valve switching device 4 .

[0104] Specifically, refer to Fig.11 When the humidifier operates in the bypass mode, the first air valve switching device 41 and the second air valve switching device 42 are controlled to operate in different states.

[0105] When the two air valve switching devices are in the same state, the indoor return air outlet RA will be connected to the indoor exhaust air outlet EA. If the two air valve switching devices are in different states, the indoor return air outlet RA will be connected to the fresh air supply outlet SA. At the same time, since the blower is in working state, the heat dissipation airflow of the indoor return air duct 12b will be sent out through the fresh air supply outlet SA.

[0106] Specifically, refer to Figure 7 , the first air valve switching device 41 is in the second state of the cross channel, and the second air valve switching device 42 is in the first state of the parallel channel:

[0107] The heat dissipation airflow of the electrical cavity 14b enters the indoor return air duct 12b through the connecting port 16, and then passes through the first air valve switching device 41, the first humidity treatment chamber 11a, and the second air valve switching device 14b to reach the fresh air supply cavity 13c, and is finally delivered through the fresh air supply port SA.

[0108] The indoor air passes through the indoor return air outlet RA, the indoor return air chamber 12a, the indoor return air duct 12b, and then through the first air valve switching device 41, the first humidity treatment chamber 11a, the second air valve switching device 14b, reaches the fresh air supply chamber 13c, and is finally delivered from the fresh air supply outlet SA.

[0109] Reference Figure 8 , the first air valve switching device 41 is in a first state of parallel channels, and the second air valve switching device 42 is in a second state of cross channels:

[0110] The heat dissipation airflow of the electrical cavity 14b enters the indoor return air duct 12b through the connecting port 16, and then passes through the first air valve switching device 41, the second humidity processing chamber 11b, the second air valve switching device 14b, reaches the fresh air supply cavity 13c, and is finally delivered through the fresh air supply port SA.

[0111] The indoor air passes through the indoor return air outlet RA, the indoor return air chamber 12a, the indoor return air duct 12b, and then through the first air valve switching device 41, the second humidity treatment chamber 11b, the second air valve switching device 14b, reaches the fresh air supply chamber 13c, and is finally delivered from the fresh air supply outlet SA.

[0112] Therefore, when the first air valve switching device 41 and the second air valve switching device are in different states, the electrical cavity 14b can be connected to the fresh air supply port SA, and the indoor return air port RA can be connected to the fresh air supply port SA. In this way, the heat dissipation airflow at the electrical box can flow from the fresh air supply port SA to the room under the action of the blower 51, thereby avoiding the heat dissipation airflow from the indoor return air port RA to the room. In addition, the indoor air enters the machine from the indoor return air port RA, and is finally sent out from the fresh air supply port SA, forming an internal circulation. At this time, the filter device inside the humidifier plays a role in purifying the indoor air.

[0113] In the present application, in the bypass mode, by controlling the air valve switching device, the heat dissipation airflow of the electrical box can be delivered from the fresh air supply port SA, thereby avoiding the unpleasant feeling brought to the user when the air is discharged from the indoor return air port RA; in addition, the negative pressure airflow of the blower is used to dissipate the heat of the electrical box, thereby ensuring the heat dissipation effect of the electrical box.

[0114] According to the embodiment of the present application, after the first air valve switching device 41 or the second air valve switching device 42 switches state, the energy-saving control mode is entered, and the cooling fan is controlled in combination with the gear of the blower. The energy-saving control mode refers to the above-mentioned related content and will not be repeated here.

[0115] The concept of the present application is to connect the electrical cavity 14b with the air duct cavity, so that the negative pressure airflow generated by the fan in the air duct cavity can be used to dissipate heat for the electrical box; a cooling fan is arranged on the electrical box, and the cooling fan is used to assist the fan in dissipating heat, thereby ensuring the heat dissipation effect of the electrical box.

[0116] The concept of the present application is that when the temperature inside the electrical box is high, the heat dissipation effect of the fan cannot meet the heat dissipation demand of the electrical box, and the cooling fan works at this time; when the temperature inside the electrical box is not high, the heat dissipation effect of the fan can meet the heat dissipation demand of the electrical box, and the cooling fan does not work, thereby reducing the use time of the cooling fan while ensuring the heat dissipation demand of the electrical box and avoiding energy waste.

[0117] The concept of the present application is that when the fan is working at a low wind speed, the cooling fan is always working, thereby avoiding the noise problem caused by the frequent start and stop of the cooling fan.

[0118] The concept of the present application is that when the temperature inside the electrical box is not lower than an abnormal value (a second preset value), the cooling fan is controlled to increase its power. If the temperature inside the electrical box is not lowered after the cooling fan increases its power, an alarm is issued and the machine is shut down, thereby avoiding misjudgment caused by an alarm and shutdown when the temperature inside the electrical box is higher than the abnormal value.

[0119] The concept of the present application is to control the change state of one of the two air valve switching devices in the bypass mode, so that the indoor return air outlet RA is connected with the fresh air supply outlet SA. The negative pressure airflow generated by the air supply fan can dissipate heat at the electrical box, and the heat-dissipating airflow can be sent out from the fresh air supply outlet SA, thereby avoiding the user's bad experience when the heat-dissipating airflow is blown out from the indoor return air outlet RA; in addition, the air supply fan allows the indoor air to form an internal circulation through the humidifier, so that the humidifier can purify the indoor air.

[0120] 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.

[0121] 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 housing having an air duct cavity and an electrical cavity formed therein; A fan, disposed in the air duct cavity, for driving the air flow in the air duct cavity; An electrical box is arranged in the electrical cavity, and a cooling fan is arranged on the electrical box; Wherein, the electrical cavity is communicated with the air duct cavity, and under the action of the blower and / or the heat dissipation fan, the heat dissipation airflow in the electrical box flows through the electrical cavity to the air duct cavity; A temperature sensor, used to detect the temperature inside the electrical box; The controller is used to control the cooling fan to turn on when the detection value of the temperature sensor is not less than a first preset value.

2. The humidity control machine according to claim 1, characterized in that: The controller is also used for: When the gear position of the fan is not higher than the first preset gear position, the cooling fan is controlled to be always on.

3. The humidity control machine according to claim 2, characterized in that: The controller is also used to determine whether the detection value of the temperature sensor is not less than a first preset value, and if so, control the cooling fan to increase power; if not, control the cooling fan to reduce power.

4. The humidity control machine according to claim 2, characterized in that: When the fan gear is higher than the first preset gear and not higher than the second preset gear, it is determined whether the detection value of the temperature sensor is not less than the first preset value. If so, the cooling fan is controlled to be turned on; if not, the cooling fan is controlled to be turned off.

5. The humidity control machine according to claim 4, characterized in that: The controller is also used to control the cooling fan to turn off when the gear position of the fan is higher than a second preset gear position.

6. The humidity control machine according to claim 1, characterized in that: The controller is used to: when the detection value of the temperature sensor is not less than the second preset value, control the heat dissipation fan to increase the power, and after running for a preset time, if the detection value of the temperature sensor is still not less than the second preset value, alarm and shut down; The second preset value is greater than the first preset value.

7. A humidity control machine, characterized in that: include: A shell body, on which a fresh air inlet, a fresh air supply outlet, an indoor air return outlet and an indoor air exhaust outlet are provided, and an air duct cavity is also provided in the shell body, and the air duct cavity includes a first humidity processing cavity and a second humidity processing cavity; The air valve switching device comprises a first air valve switching device and a second air valve switching device. When the two air valve switching devices are in a first state, the first humidity processing chamber is connected to the fresh air inlet and the fresh air supply port to form a fresh air duct, and the second humidity processing chamber is connected to the indoor return air port and the indoor exhaust port to form an exhaust air duct; when the two air valve switching devices are in a second state, the second humidity processing chamber is connected to the fresh air inlet and the fresh air supply port to form a fresh air duct, and the first humidity processing chamber is connected to the indoor return air port and the indoor exhaust port to form an exhaust air duct; A blower, arranged corresponding to the fresh air supply outlet; An exhaust fan, arranged corresponding to the indoor exhaust outlet; Wherein, an electrical cavity is also provided in the shell, and the electrical cavity is communicated with the exhaust air duct; The humidifier also includes: An electrical box is arranged in the electrical cavity, and a cooling fan is arranged on the electrical box. Under the action of the cooling fan and / or the exhaust fan, the cooling air flow in the electrical box flows through the electrical cavity to the exhaust duct; A temperature sensor, used to detect the temperature inside the electrical box; The controller is used to control the cooling fan to turn on when the detection value of the temperature sensor is not less than a first preset value.

8. The humidity control machine according to claim 7, characterized in that: The communication position between the electrical cavity and the exhaust air duct is located on the windward side of the air valve switching device; A bypass air duct and a bypass air valve are also provided in the shell, wherein the bypass air duct is connected between the fresh air inlet and the fresh air supply outlet; and the bypass air valve is used to disconnect or connect the bypass air duct; The controller is used to: in bypass mode, control the supply fan to turn on, the exhaust fan to turn off, the bypass air valve to open, and the first air valve switching device or the second air valve switching device to switch the state, so that the indoor return air outlet is connected to the fresh air supply outlet.

9. The humidity control machine according to claim 8, characterized in that: The controller is also used to enter an energy-saving control mode after the first air valve switching device or the second air valve switching device switches state.

10. A method for controlling a humidity control machine, characterized in that: The humidity control machine comprises: A housing having an air duct cavity and an electrical cavity formed therein; A fan, disposed in the air duct cavity, for driving the air flow in the air duct cavity; An electrical box is arranged in the electrical cavity, and a cooling fan is arranged on the electrical box; Wherein, the electrical cavity is communicated with the air duct cavity, and under the action of the blower and / or the heat dissipation fan, the heat dissipation airflow in the electrical box flows through the electrical cavity to the air duct cavity; The control method comprises: Get the temperature inside the electrical box; When the temperature in the electrical box is not less than a first preset value, the cooling fan is turned on.

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