Self-heating miniature household fresh air ventilator and control system

Abstract

The invention relates to the technical field of air treatment equipment, in particular to a self-heating miniature household fresh air ventilator and a control system.According to the household fresh air ventilator, a filtering and heating module can be arranged in a pipeline, and the living space is not occupied; the stepping motor controls the air valve to rotate so as to control the opening and closing area of the ventilation opening, accurate control can be achieved, complete closing can be achieved when the outside is cold, cold air is effectively prevented from entering a room, and the obvious heat preservation effect is achieved. The filtering and heating module can achieve the self-heating function while filtering is conducted, and the problem that the fan cannot be used due to the fact that an air inlet of the fan is frozen in winter is solved. Meanwhile, the household fresh air ventilator is installed on the indoor wall, the occupied space is small, and compared with an existing fresh air ventilator, the overall attractiveness degree of a room can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air treatment equipment, and in particular to a self-heating miniature household fresh air fan and a control system. Background Art

[0002] In the current field of air treatment equipment, fresh air systems and related products are constantly developing to meet people's needs for healthy air, but the existing technology still has many shortcomings, as follows:

[0003] Defects of traditional single-unit fresh air fans: Although the single-unit fresh air fans launched by professional fresh air manufacturers are smaller in size and more beautiful in appearance than traditional ducted fresh air fans, they still have significant shortcomings. On the one hand, the wall opening is usually 120mm, which takes up a large space. On the other hand, most of these single-unit fresh air fans do not have heat exchange functions, let alone self-heating functions. Even if some products have heat exchange functions, they are heat exchanged through indoor temperature energy storage, which consumes indoor heat and is extremely detrimental to winter home warmth in the north. In addition, most of the air valve controllers on the market are installed outside the pipe, which are large in size and affect the appearance, resulting in customers rarely choosing such air valves when installing them at home, which greatly limits the promotion and use of the product.

[0004] Disadvantages of fresh air air conditioners: Fresh air air conditioners launched by air conditioner manufacturers combine fresh air and air conditioning functions, which to a certain extent solve the problem of space occupation and aesthetics of fresh air machines. However, it also has serious limitations. Since the fresh air duct and the fluorine tube share a hole, the aperture of the fresh air duct is small, which leads to a small fresh air volume. Especially in winter in cold northern regions, the air inlet of the wall-mounted fresh air air conditioner is small, and it is very easy for cold and hot air to freeze when they meet, thus blocking the air inlet, making it impossible to activate the fresh air function normally, and unable to meet the user's demand for fresh air in winter.

[0005] To sum up, the existing fresh air systems and related products on the market are either large in size or have no self-heating function, which leads to a poor user experience in winter. Summary of the invention

[0006] In view of this, the purpose of the present invention is to provide a self-heating miniature household fresh air fan and control system to solve the problem that the fresh air system and related products in the prior art are large in size and have no self-heating function, resulting in poor user experience in winter.

[0007] According to a first aspect of an embodiment of the present invention, there is provided a self-heating miniature household fresh air fan, comprising:

[0008] Indoor air outlet module and filter heating module;

[0009] The indoor air outlet module includes a shell composed of a panel, an outer shell and a back plate, and a stepper motor and a control circuit board arranged inside the shell, wherein the stepper motor is mounted on the control circuit board, the control circuit board is mounted on the back plate, a vent is arranged on the back plate, a transmission shaft of the stepper motor extends from the center of the control circuit board and the back plate, and an air valve is installed at the end of the transmission shaft; a lateral air outlet is arranged on the outer shell;

[0010] The indoor air outlet module is connected to the ventilation duct via a flange;

[0011] The filtering and heating module is arranged inside the ventilation duct, and comprises: an axial flow fan and a heating filter; the heating filter is arranged on the side of the axial flow fan close to the outside; the axial flow fan and the heating filter are both connected to a control circuit board.

[0012] Preferably, the filtering and heating module further comprises:

[0013] A fixing bracket, a second heating screen and a second filter screen;

[0014] The second heating net is connected to the flange via a fixed bracket, the second filter net is connected to the second heating net via a fixed bracket, the axial flow fan is connected to the second filter net via a fixed bracket, and the heating filter net is connected to the axial flow fan via a fixed bracket.

[0015] Preferably, the self-heating miniature household fresh air blower further comprises:

[0016] A temperature and humidity sensor connected to the control circuit board;

[0017] The control circuit board is also used to control the second heating network and the heating filter network to heat when the temperature and humidity data reaches the freezing temperature, and to control the second heating network and the heating filter network to stop heating when the temperature and humidity data are higher than a certain threshold of the freezing temperature.

[0018] Preferably, the filtering part in the heating filter is a primary filter;

[0019] The second filter is a HEPA filter and / or a medium efficiency filter.

[0020] Preferably, the ventilation openings arranged on the back plate are a plurality of fan-shaped ventilation openings, the air valve is a circular air valve, and the center of the circular air valve is connected to the transmission shaft of the stepping motor.

[0021] The center of the circular air valve is connected to the stepping motor.

[0022] Preferably, the control circuit board controls the air valve opening by the following formula:

[0023]

[0024] Among them, Q is the air volume, C is the pipe flow coefficient, V is the wind speed, M is the number of blocks divided by the fan blades of the air valve, and θ j is the rotation angle of a single pulse of the stepper motor, and r is the radius of the inner tube of the ventilation duct.

[0025] Preferably, the heating part in the heating filter cotton and the second heating net are made of carbon fiber filaments, and the surface of the carbon fiber filaments is wrapped with insulating material.

[0026] According to a second aspect of an embodiment of the present invention, a household fresh air fan control system is provided, comprising:

[0027] A self-heating micro household fresh air machine as described in any one of the above, and a smart gateway;

[0028] The intelligent gateway is used to send a control signal to the self-heating micro household fresh air fan.

[0029] Preferably, the household fresh air fan control system further includes:

[0030] Ventilation ducts, sealing silicone rings and hoods;

[0031] The ventilation duct is installed in the wall; one end of the ventilation duct is connected to the outside air through a sealing silicone ring and a wind hood; the other end of the ventilation duct is connected to the indoor air outlet of the self-heating micro household fresh air fan through the wall.

[0032] Preferably, the household fresh air fan control system further includes:

[0033] A sensor set for acquiring home environment data;

[0034] The sensor group is connected to the intelligent gateway via wired or wireless means, so that the intelligent gateway controls the operation of the self-heating micro household fresh air fan according to the home environment data.

[0035] The technical solution provided by the embodiments of the present invention may have the following beneficial effects:

[0036] It is understandable that the technical solution shown in the present invention can set a filtering and heating module in the pipeline without occupying living space; by controlling the rotation of the air valve through a stepper motor to control the opening and closing area of ​​the vent, precise control can be achieved, and it can be completely closed when it is cold outside, effectively preventing cold air from entering the room, and has a significant insulation effect. The filtering and heating module can perform the function of self-heating while filtering, solving the problem of the fan being unable to be used due to ice on the air inlet of the fan in winter. At the same time, this household fresh air fan is installed on the indoor wall and occupies less space. Compared with the existing fresh air fans, it can improve the overall aesthetics of the room.

[0037] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0039] Figure 1 is a schematic diagram of a self-heating micro household fresh air fan according to an exemplary embodiment;

[0040] Figure 2 is a schematic diagram of an air volume control module according to an exemplary embodiment;

[0041] Figure 3 is a schematic diagram of a filtering and heating module according to an exemplary embodiment;

[0042] Figure 4 is a schematic diagram of air volume control according to an exemplary embodiment;

[0043] Figure 5 is a schematic diagram of a household fresh air fan control system according to an exemplary embodiment;

[0044] Figure 6 It is a schematic diagram of another household fresh air fan control system according to an exemplary embodiment. DETAILED DESCRIPTION

[0045] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0046] In one embodiment, Figure 1 is a schematic diagram of a self-heating micro household fresh air fan according to an exemplary embodiment, see Figures 1 to 3 , a self-heating micro household fresh air fan, comprising:

[0047] Indoor air outlet module 200 and filtering and heating module 300;

[0048] The indoor air outlet module 200 includes a shell composed of a panel 207, a shell 206 and a back plate 203, and a stepper motor 202 and a control circuit board 201 arranged inside the shell, wherein the stepper motor 202 is mounted on the control circuit board 201, and the control circuit board 201 is mounted on the back plate 203, and a vent is provided on the back plate 203, and a transmission shaft of the stepper motor 202 extends from the center of the control circuit board 201 and the back plate 203, and a wind valve 204 is installed at the end of the transmission shaft; a lateral air outlet is provided on the shell 206;

[0049] The indoor air outlet module 200 is connected to the ventilation duct via a flange 205;

[0050] The filtering and heating module 300 is arranged inside the ventilation duct, and includes: an axial flow fan 301 and a heating filter 302; the heating filter 302 is arranged on the side of the axial flow fan 301 close to the outdoors; the axial flow fan 301 and the heating filter 302 are both connected to the control circuit board 201.

[0051] The heating filter 302 is made by winding a self-heating wire and a filter together.

[0052] In winter in the north, after the fresh air blower stops working, hot and cold air easily gather inside it, and at this time, the heating filter 302 is the first to be affected and will soon freeze. Once frozen, air cannot pass through the filter smoothly, and the fresh air blower cannot work normally.

[0053] To ensure that the fresh air blower can operate normally in a low temperature environment, when the system is ready to start the fresh air function, the preheating mode will be turned on first, so that the filter heating module 300 can achieve self-heating. The heat generated by the heating wire in the device will be quickly transferred to the heating filter 302, so that the frost will melt quickly.

[0054] After that, the intelligent system will use the temperature and humidity sensors to monitor the ambient temperature and humidity data in real time. When the temperature and humidity reach suitable conditions, the intelligent system will start the fan to allow the air to flow in an orderly manner along the axial direction. Under the precise control of the intelligent system, the room can continuously and dynamically introduce fresh air to create a comfortable and healthy indoor air environment.

[0055] The panel 207 of the indoor air outlet module can play a certain protective role on the internal device of the fresh air machine. The indoor air outlet module 200 is installed on the wall and does not occupy the living space. The panel 207 in front of the indoor air outlet module 200 is processed by metal and oxidized, and has a beautiful appearance. At the same time, it can be customized with patterns or display modules. After design, it can be integrated with the user's decoration style and play a beautiful role. The panel can also be modified later to allow it to be equipped with components such as indicator lights or display screens for user convenience.

[0056] A sealing silica gel 402 is further provided between the back plate 203 and the control circuit board 201. When the control circuit board 201 and the back plate 203 are installed, the sealing silica gel 402 and the control circuit board 201 are installed on the back plate 203 through screws 403.

[0057] In actual application scenarios, it is very easy to install this self-heating micro household fresh air fan. You only need to open a small hole on the wall, such as a hole with a diameter of 80mm, to complete the ventilation connection between the fresh air fan and the outside world and introduce fresh air into the room. After installation, only the indoor air outlet module 200 is installed on the indoor wall, which will not affect the overall aesthetics of the room.

[0058] The power supply (including DC heating power supply) and control circuit of the entire device of this self-heating micro household fresh air fan are all in the indoor air outlet module 200 shell, which can prevent it from being affected by the internal and external temperature changes of the fresh air fan equipment, making the equipment stable and reliable.

[0059] During use, the control circuit board can control the rotation of the drive shaft of the stepper motor according to the received control signal, drive the air valve to rotate, and thus accurately adjust the opening and closing area of ​​the vent on the back plate, thereby realizing accurate control of the fresh air volume. When encountering a low temperature environment, when ice appears on the air inlet or filter components, the system will automatically start the self-heating function, and the fresh air fan will use DC heating to heat the heating filter 302, quickly melt the frost, and ensure the continuous and stable operation of the fresh air fan, and continuously deliver fresh and warm air to the room.

[0060] The diameter of the fresh air machine body of this embodiment is about 120mm, the indoor air outlet 100 is made of ultra-thin circular metal, and the air inlet adopts side blowing, which is fashionable, beautiful and exquisite, solving the problem that the single fresh air machine of the fresh air manufacturer is too large and occupies too much living space. The axial flow fan 301 is embedded in the wall duct, and the fresh air machine has a DC heating function, so that the fresh air machine can continue to operate in winter.

[0061] In another embodiment, it should be noted that the filtering and heating module 300 further includes:

[0062] A fixed bracket 303, a second heating net 304 and a second filter net 305; the second heating net 304 is connected to the flange 205 via the fixed bracket 303, the second filter net 305 is connected to the second heating net 304 via the fixed bracket 303, the axial flow fan 301 is connected to the second filter net 305 via the fixed bracket 303, and the heating filter net 302 is connected to the axial flow fan 301 via the fixed bracket 303.

[0063] In specific practice, this embodiment sets a second heating net 304 and a second filter net 305 inside the axial flow fan 301, and sets a heating filter net 302 outside the axial flow fan 301. The setting of the fixed bracket 303 makes the various components of the filtering and heating module 300 firmly installed, ensuring the stable operation of the fresh air fan. The addition of the second heating net 304 and the second filter net 305 strengthens the air filtering and heating effects, improves the air quality, and provides users with a healthier and more comfortable air environment. The heating filter net 302 is set on the outside, which can block large particles of pollutants in the air. At the same time, in the outermost layer, it can heat the air and prevent freezing.

[0064] Preferably, the heating portion in the heating filter cotton and the second heating net 305 are made of carbon fiber filaments, and the surface of the carbon fiber filaments is wrapped with insulating material.

[0065] As a new type of non-metallic semiconductor material, carbon fiber has unique advantages in the field of heating. Its raw silk is used as the main heating element. Unlike traditional metal cables, carbon fiber contains far infrared and negative ion components. These components give carbon fiber extremely fast thermal conductivity and extremely high electric heat conversion rate, and its electric heat conversion rate can reach more than 90%. This means that under the same energy consumption, carbon fiber can generate more heat, greatly improving energy utilization efficiency.

[0066] In addition, carbon fiber also has the function of sterilization and deodorization during the heating process. While releasing heat, it can effectively kill harmful bacteria in the air, decompose and remove odor molecules, and improve indoor air quality. This feature not only creates a warm and comfortable environment for people, but also greatly benefits human health and provides a healthier and safer guarantee for home life.

[0067] The filtering part in the heating filter is a primary filter; the second filter 305 is a HEPA filter and / or a medium-efficiency filter.

[0068] The multi-layer filter structure can effectively filter out various pollutants such as dust, pollen, bacteria, viruses, etc. in the air, improve the filtering accuracy, provide users with cleaner fresh air, and ensure the indoor air quality. First, set the primary filter on the outermost layer. The function of the primary filter is to block large floccules, flying insects and large impurities. You can rinse it with water every once in a while to remove the debris remaining on the filter. Since the primary filter is low in cost, you can also directly replace the primary filter.

[0069] The second filter 305 is arranged closer to the indoor side than the primary filter. The air will reach the second filter after passing through the primary filter. The second filter is a HEPA filter and / or a medium-efficiency filter, which can further filter the air. At the same time, the air is filtered by the second filter after passing through the primary filter, which can increase the service life of the second filter.

[0070] When the second filter 305 adopts a HEPA filter, it can also suppress the noise generated by the fan blades. Since the axial flow fan 301 is embedded in the pipeline, the strong air pressure generated by the axial flow motor and the friction with the fan blades generate noise, which is first brought in by the airflow, first passes through the primary filter, and then passes through the HEPA filter. The wind speed will be reduced. Since the noise is a mechanical wave, the noise of the motor blades is blocked by the filter, and generates heat through the friction of the filter. The amplitude of the mechanical wave decreases and is converted into heat energy, thereby achieving a sound absorption effect.

[0071] It should be noted that the self-heating micro household fresh air fan also includes:

[0072] A temperature and humidity sensor connected to the control circuit board 201; the control circuit board 201 is also used to control the second heating network and the heating filter network to heat when the temperature and humidity data reaches the freezing temperature, and to control the second heating network and the heating filter network to stop heating when the temperature and humidity data are higher than a certain threshold of the freezing temperature.

[0073] It can be understood that the above settings can achieve a dynamic heating mode, which consumes less power than turning on the heating all the time.

[0074] In actual application, the temperature and humidity sensor probe is set in the pipeline and connected to the control circuit board 201 through a signal line. The control circuit board 201 is pre-written with a program. When the fresh air fan is turned on, the temperature and humidity sensor collects data in real time and transmits it to the control circuit board 201. The control circuit board 201 controls the heating work of the second heating network 304 and the heating filter 302 according to the preset temperature and humidity thresholds. It can be understood that the temperature and humidity sensor cooperates with the control circuit board 201 to realize intelligent heating control. In cold weather or when the air humidity is high, the heating function is automatically started to avoid icing of the filter, ensure the normal operation of the fresh air fan, and improve the adaptability and reliability of the fresh air fan.

[0075] In another embodiment, see Figure 4 The ventilation openings arranged on the back plate 203 are a plurality of fan-shaped ventilation openings, and the air valve 204 is a circular air valve, and the center of the circular air valve is connected to the transmission shaft of the stepping motor 202 .

[0076] When the opening of the air valve 204 completely overlaps with the vent on the back plate 203, the air valve 204 is fully opened, and the air volume is maximum at this time; when the air valve 204 completely blocks the vent of the back plate 203, the air valve 204 is closed. The control circuit rotates the air valve 204 through the stepper motor 202 to control the opening and closing angle between it and the back plate 203. Each time the stepper motor 202 receives a pulse, the air valve 204 rotates a step angle (for example: a stepper motor 202 with a step angle of 1.8 degrees is selected, and each time a control pulse is received, the motor rotates 1.8 degrees, and the total opening and closing angle of the air valve 204 is 36 degrees). The air valve 204 blocks the vent of the back plate 203 and increases the rotation angle as the number of pulses increases (after 5 pulses, the total opening and closing angle of the air valve 204 is 180 degrees), thereby changing the cross-sectional area of ​​the vent, and accurately controlling the size of the air inlet cross-sectional area through an intelligent algorithm, thereby achieving the effect of controlling the size of the air volume.

[0077] It should be noted that the control circuit board 201 controls the opening of the air valve 204 through the following formula:

[0078]

[0079] Wherein, Q is the air volume, C is the pipe flow coefficient, V is the wind speed, M is the number of blocks divided by the fan blades of the air valve 204, θ j is the rotation angle of a single pulse of the stepper motor 202, and r is the radius of the inner tube of the ventilation duct.

[0080] In another embodiment, a household fresh air fan control system is provided. Figure 5 ,include:

[0081] A self-heating micro-household fresh air machine 10 as described in any one of the above items, and an intelligent gateway 20; the intelligent gateway 20 is used to send a control signal to the self-heating micro-household fresh air machine 10.

[0082] In actual applications, the intelligent gateway 20 can transmit signals, receive and forward control instructions from the user's intelligent terminal to the fresh air fan, and at the same time feed back the operating status of the fresh air fan. It can also control the fresh air fan, adjust the air volume, heating function, etc. according to the preset program and user parameters, and coordinate the fresh air fan to work together with other smart home devices. It can process and analyze the data of the fresh air fan and environmental sensors, provide usage suggestions, and predict the time to replace the filter. In addition, the intelligent gateway 20 supports a variety of communication protocols, which is convenient for system expansion and upgrading, can connect more devices, and can also improve performance through software upgrades. Preferably, the intelligent gateway 20 also supports a touch screen function, which is convenient for users to use, and can also expand and add other smart home control functions, for example, control other devices in the room, such as lights, curtains, scenes, background music, air conditioning, etc.

[0083] Preferably, the smart gateway 20 can also be combined with the panel of the fresh air fan. If the installation position of the fresh air fan is convenient for user operation, the smart gateway can be built into the panel to further reduce the occupied area of ​​the smart gateway 20.

[0084] It should be noted that the household fresh air fan control system is described in detail in Figure 6 , also includes:

[0085] A ventilation duct 30, a sealing silicone ring 40 and a wind hood 50; the ventilation duct 30 is installed in the wall; one end of the ventilation duct is connected to the outside air through the sealing silicone ring 40 and the wind hood 50; the other end of the ventilation duct is connected to the indoor air outlet 100 of the self-heating micro household fresh air fan.

[0086] It should be noted that the household fresh air fan control system also includes: a sensor group for obtaining home environment data; the sensor group is connected to the smart gateway 20 via wired or wireless connection, so that the smart gateway 20 controls the operation of the self-heating micro household fresh air fan according to the home environment data.

[0087] In addition, in practical applications, the panel of the indoor air outlet 100 can be processed into a rectangular, square or any other shape, so that it is more beautiful after being integrated into the environment. At the same time, the axial flow motor can use a fixed speed axial flow fan 301, or replace the DC axial flow fan 301 with an AC axial flow fan 301. HEPA can also add an activated carbon filament heating function.

[0088] It can be understood that the self-heating micro household fresh air blower and control system shown in the present invention have the following advantages:

[0089] Compared with traditional single-unit fresh air fans, they are smaller in size and do not occupy living space. As an owner, if you choose to install a fresh air fan in the bedroom or living room, you will definitely choose a fresh air fan that takes up less space and can be integrated into the decoration style.

[0090] Compared with fresh air air conditioners: fresh air air conditioners cannot be used continuously in winter, the customer experience is poor, and the pipes are easily frozen and clogged. It is true that the air conditioner itself has a heating function, but it is the heating of the indoor unit. The heat cannot be transmitted to the air inlet through its thin pipes in time, and it often freezes at the air inlet, which is difficult to solve. The fresh air fan shown in this technical solution has a heating wire in the heating filter at the intersection of cold and hot air in the pipe. Freezing is caused by the meeting of cold and hot air. Therefore, it can be heated to avoid freezing and ensure good ventilation effect.

[0091] Traditional single-unit fresh air fans have very good fresh air effects, but because of their large air inlets and lack of air volume control valves, and because they have no self-heating function but only heat exchange function, they will seriously deplete the indoor temperature in the cold winter in the north, causing owners to stop using fresh air in winter and block the air inlets indoors with cotton cloth or something like that. The fresh air fans of this technical solution can perfectly solve the above problems. The self-heating function does not require loss of indoor temperature. Although the air inlet is slightly smaller than that of single-unit fresh air fans, it can also achieve excellent ventilation effects in home environments.

[0092] It can be understood that the same or similar parts of the above embodiments can be referenced to each other, and the contents not described in detail in some embodiments can refer to the same or similar contents in other embodiments.

[0093] It should be noted that, in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "plurality" refers to at least two.

[0094] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0095] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0096] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0097] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0098] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0099] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0100] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A self-heating miniature household fresh air fan, characterized in that: include: Indoor air outlet module and filter heating module; The indoor air outlet module includes a shell composed of a panel, an outer shell and a back plate, and a stepper motor and a control circuit board arranged inside the shell, wherein the stepper motor is mounted on the control circuit board, the control circuit board is mounted on the back plate, a vent is arranged on the back plate, a transmission shaft of the stepper motor extends from the center of the control circuit board and the back plate, and an air valve is installed at the end of the transmission shaft; a lateral air outlet is arranged on the outer shell; The indoor air outlet module is connected to the ventilation duct via a flange; The filtering and heating module is arranged inside the ventilation duct, and comprises: an axial flow fan and a heating filter; the heating filter is arranged on the side of the axial flow fan close to the outside; the axial flow fan and the heating filter are both connected to a control circuit board.

2. The self-heating micro household fresh air machine according to claim 1 is characterized in that: The filtering and heating module further comprises: A fixing bracket, a second heating screen and a second filter screen; The second heating net is connected to the flange via a fixed bracket, the second filter net is connected to the second heating net via a fixed bracket, the axial flow fan is connected to the second filter net via a fixed bracket, and the heating filter net is connected to the axial flow fan via a fixed bracket.

3. The self-heating micro household fresh air machine according to claim 2 is characterized in that: Also includes: A temperature and humidity sensor connected to the control circuit board; The control circuit board is also used to control the second heating network and the heating filter network to heat when the temperature and humidity data reaches the freezing temperature, and to control the second heating network and the heating filter network to stop heating when the temperature and humidity data are higher than a certain threshold of the freezing temperature.

4. The self-heating micro household fresh air machine according to claim 2 is characterized in that: The filtering part in the heating filter is a primary filter; The second filter is a HEPA filter and / or a medium efficiency filter.

5. The self-heating micro household fresh air machine according to claim 1 is characterized in that: The ventilation openings arranged on the back plate are a plurality of fan-shaped ventilation openings, and the air valve is a circular air valve, and the center of the circular air valve is connected to the transmission shaft of the stepping motor.

6. The self-heating micro household fresh air machine according to claim 5 is characterized in that: The control circuit board controls the air valve opening by the following formula: Among them, Q is the air volume, C is the pipe flow coefficient, V is the wind speed, M is the number of blocks divided by the fan blades of the air valve, and θ j is the rotation angle of a single pulse of the stepper motor, and r is the radius of the inner tube of the ventilation duct.

7. The self-heating micro household fresh air machine according to claim 2 is characterized in that: The heating part in the heating filter cotton and the second heating net are made of carbon fiber filaments, and the surface of the carbon fiber filaments is wrapped with insulating material.

8. A household fresh air fan control system, characterized in that: include: The self-heating micro household fresh air blower according to any one of claims 1 to 7, and a smart gateway; The intelligent gateway is used to send a control signal to the self-heating micro household fresh air fan.

9. The household fresh air blower control system according to claim 8, characterized in that: Also includes: Ventilation ducts, sealing silicone rings and hoods; The ventilation duct is installed in the wall; one end of the ventilation duct is connected to the outside air through a sealing silicone ring and a wind hood; the other end of the ventilation duct is connected to the indoor air outlet of the self-heating micro household fresh air fan through the wall.

10. The household fresh air blower control system according to claim 8, characterized in that: Also includes: A sensor set for acquiring home environment data; The sensor group is connected to the intelligent gateway via wired or wireless means, so that the intelligent gateway controls the operation of the self-heating micro household fresh air fan according to the home environment data.

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