Heating ventilator and control method thereof

Abstract

The invention discloses a heating ventilator and a control method thereof, the heating ventilator comprises an air supply part, a heating part, a temperature detection part, a storage part, a temperature comparison part and a control part, the air supply part has a first air speed and a second air speed, and the first air speed is greater than the second air speed; the heating part has first power and second power, and the first power is greater than the second power; the control part is used for controlling operation states of the air supply part and the heating part; the heating mode of the heating ventilator comprises a strong heating stage, a compensation stage and a transition stage; in the strong heating stage, the heating part operates at first power and the air supply part operates at first air speed; and after the strong heating stage runs for T1, whether a compensation stage or a transition stage is entered is judged based on the comparison result of the temperature comparison part. According to the heating ventilating fan, temperature compensation can be conducted according to different sizes of the target space, the purpose of accurate temperature control is achieved, and in addition, the space temperature of the target space can be rapidly adjusted to the temperature suitable for entering the next stage.

Description

Technical Field

[0001] The present invention relates to the technical field of air-conditioning equipment, and in particular to a heating ventilation fan and a control method thereof. Background Art

[0002] Existing heating and ventilation fans typically use AC motors to reduce costs. However, because AC motors have limited speed settings and lack stepless speed regulation, the heater configuration is often simplified in small or thin heating and ventilation fans with limited design space. However, when installed in a large bathroom, even at high settings, the heating effect can be weak and the temperature can be low.

[0003] The heating mode of an existing heating ventilation fan usually includes a heating stage and a bathing stage. When the indoor temperature needs to be increased during bathing, due to the large difference in wind speed between the low gear and the high gear, the AC motor switches from low gear to high gear, which not only makes the user feel cold wind, but also causes the temperature to be unstable and fluctuate greatly during bathing. Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a heating ventilation fan and a control method thereof, which can perform temperature compensation according to the different sizes of the target space to achieve the purpose of precise temperature control. In addition, it is beneficial to quickly adjust the spatial temperature of the target space to a temperature suitable for entering the next stage.

[0005] The heating ventilation fan proposed by the present invention comprises:

[0006] an air supply unit, configured to draw air into the heating ventilation fan and discharge the air from the heating ventilation fan, the air supply unit having a first wind speed and a second wind speed, the first wind speed being greater than the second wind speed;

[0007] a heating unit, configured to heat the air sucked in by the air supply unit, the heating unit having a first power and a second power, the first power being greater than the second power;

[0008] A temperature detection unit, used to detect the space temperature Y of the target space;

[0009] a storage unit, configured to store a temperature threshold and the space temperature Y detected by the temperature detection unit;

[0010] a temperature comparison unit, configured to compare the temperature threshold with the space temperature Y;

[0011] a control unit, configured to control the operating states of the air supply unit and the heating unit according to the comparison result of the temperature comparison unit;

[0012] The heating ventilation fan has a heating mode, air sucked into the heating ventilation fan by the air supply part is heated by the heating part and then discharged to the target space;

[0013] It is characterized in that,

[0014] The heating mode includes a strong heating phase, a compensation phase and a transition phase.

[0015] In the strong heating phase, the heating part operates at the first power and the air supply part operates at the first air speed.

[0016] After the strong heating phase operates for a duration T1, whether to enter the compensation phase or the transition phase is determined based on the comparison result of the temperature comparison part.

[0017] In some optional embodiments, the temperature threshold stored in the storage part includes a temperature W2; after the strong heating phase operates for a duration T1, it is determined based on the comparison result of the temperature comparison part that the space temperature Y is lower than the temperature W2, and the compensation phase operates for a duration T2.

[0018] In some optional embodiments, after the compensation phase operates for a duration T2, the transition phase operates for a duration T3.

[0019] In some optional embodiments, the temperature threshold stored in the storage part further includes a temperature W3 higher than the temperature W2; after the strong heating phase operates for a duration T1, it is determined based on the comparison result of the temperature comparison part that the space temperature Y is higher than the temperature W2 and the space temperature Y is lower than the temperature W3, and the transition phase operates for a duration T2+T3.

[0020] In some optional embodiments, the temperature threshold stored in the storage part further includes a temperature W1 lower than the temperature W2; in the compensation phase, it is determined based on the comparison result of the temperature comparison part that the space temperature Y is lower than the temperature W1, and the control part controls the air supply part to operate at the first air speed; it is determined based on the comparison result of the temperature comparison part that the space temperature Y is higher than the temperature W1 and the space temperature Y is lower than the temperature W2, and the control part controls the air supply part to operate at the second air speed.

[0021] In some optional embodiments, the heating part has a constant power from the strong heating phase to the compensation phase.

[0022] In some optional embodiments, the heating part includes: a first heater and a second heater, the first heater is used to operate at the first power, and the second heater is used to operate at the second power; in the transition stage, the air supply part operates at the second wind speed, the first heater is in the on state, and the second heater is in the off state.

[0023] In some optional embodiments, the heating mode also includes a bathing stage; the temperature thresholds stored in the storage unit include: temperature W4 lower than temperature W3; in the bathing stage, based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than the temperature W4, and the control unit controls the first heater and the second heater to be in the on state; based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W4, and the space temperature Y is lower than the temperature W3, the control unit controls the first heater to be in the on state and the second heater to be in the off state.

[0024] In some optional embodiments, after the transition phase ends, the bathing phase is entered and the running time is T4; when entering the bathing phase from the transition phase, the wind speed of the air supply part remains unchanged.

[0025] In some optional embodiments, the heating ventilation fan also has a hot drying mode; after the heating mode ends, the hot drying mode is entered; the temperature thresholds stored in the storage unit include: temperature W5 lower than temperature W3; in the hot drying mode, based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than the temperature W5, the control unit controls the first heater and the second heater to be in the on state, and controls the air supply unit to operate at the second wind speed; based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W5, and the space temperature Y is lower than the temperature W3, the control unit controls the first heater to be in the on state, the second heater to be in the off state, and controls the air supply unit to operate at the second wind speed.

[0026] In some optional embodiments, the heating ventilation fan also has a ventilation mode; after the heat drying mode ends, it enters the ventilation mode; the control unit controls the first heater and the second heater to be in the off state, and controls the air supply unit to operate at the second wind speed.

[0027] The present invention proposes a control method for a heating ventilation fan, wherein the heating mode of the heating ventilation fan includes a strong heating stage, a compensation stage and a transition stage;

[0028] In the heating mode, the heating ventilation fan performs the following steps:

[0029] Entering the strong heating stage, the running time is T1;

[0030] After running for a time period T1, the space temperature Y is detected and it is determined that the space temperature Y is lower than the temperature W2, and the compensation phase is entered;

[0031] After the compensation phase runs for a duration of T2, the transition phase begins and runs for a duration of T3.

[0032] In some optional embodiments, after entering the strong heating stage and running for a duration of T1, the following steps are further included:

[0033] After the operation time T1, the space temperature Y is detected, and it is determined that the space temperature Y is higher than the temperature W2 and lower than the temperature W3, and the transition phase is entered;

[0034] The operation duration in the transition phase is T2+T3. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Schematic diagram of a flow chart of a method for controlling a heating ventilation fan according to an embodiment of the present invention;

[0036] Figure 2 This is one of the flow charts of the operation process of the heating ventilation fan according to an embodiment of the present invention;

[0037] Figure 3 This is the second flow chart of the operation process of the heating ventilation fan according to an embodiment of the present invention. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0039] The following orientations or positional relationships are intended solely for the purpose of facilitating the description of the present disclosure and simplifying the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limiting the present disclosure. Specifically, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

[0040] In the description of this disclosure, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood broadly. For example, they can refer to mechanical or electrical connections, direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this disclosure based on the specific circumstances.

[0041] The heating ventilation fan provided by the embodiment of the present disclosure includes an air supply unit, a heating unit, a temperature detection unit, a storage unit, a temperature comparison unit and a control unit. The air supply unit is used to inhale air into the heating ventilation fan and discharge the air from the heating ventilation fan. The air supply unit has a first wind speed and a second wind speed, and the first wind speed is greater than the second wind speed; the heating unit is used to heat the air inhaled by the air supply unit, and the heating unit has a first power and a second power, and the first power is greater than the second power; the temperature detection unit is used to detect the space temperature Y of the target space; the storage unit is used to store the temperature threshold and the space temperature Y detected by the temperature detection unit; the temperature comparison unit is used to compare the temperature threshold and the space temperature Y; the control unit is used to control the operating status of the air supply unit and the heating unit according to the comparison result of the temperature comparison unit.

[0042] The heating ventilation fan has a heating mode. The air sucked into the heating ventilation fan by the air supply part is heated by the heating part and then discharged to the target space. The heating mode includes a strong heating stage, a compensation stage and a transition stage. In the strong heating stage, the heating part operates at a first power and the air supply part operates at a first wind speed. After the strong heating stage has been running for a duration of T1, it is determined whether to enter the compensation stage or the transition stage based on the comparison result of the temperature comparison part.

[0043] Specifically, a heating ventilation fan is a device that draws air from a first space and discharges it into a second space, or heats the air drawn from a first space and then discharges it back into the first space. For example, a heating ventilation fan is installed in a bathroom and functions as a bathroom heater. In this operating condition, the first space is indoors and the second space is outdoors.

[0044] The heating ventilation fan includes a shell, an air path switching plate, an air supply unit, a heating unit, a temperature detection unit, a storage unit, a temperature comparison unit and a control unit. The following is a detailed description of the various components of the heating ventilation fan.

[0045] The shell includes a frame of the heating ventilation fan and a panel arranged on the bottom surface, and the shell has an air inlet, a circulation air outlet and an exhaust air outlet. The air inlet is an opening provided for sucking in indoor air, and the air inlet is provided on the panel, facing the indoor side. The circulation air outlet is an opening provided for blowing the air sucked in from the air inlet into the room as circulating air, and the circulation air outlet is also provided on the panel, facing the indoor side. The exhaust air outlet is an opening provided for blowing the air sucked in from the air inlet out to the outside as exhaust air, and the exhaust air outlet is provided near the outdoor side. For example, when the heating ventilation fan is installed on the ceiling, the exhaust air outlet is provided on the side of the frame. In an optional embodiment of the present disclosure, the air inlet, the circulation air outlet and the exhaust air outlet on the shell can be provided at different positions of the shell according to actual needs.

[0046] The frame is constructed with a circulating air outlet channel and an exhaust air outlet channel. An air path switching plate is installed within the frame. The air path switching plate rotates around the rotation axis to open the circulating air outlet, the exhaust air outlet, or both. By changing the angle of the air path switching plate, air within the frame can be discharged to the circulating air outlet and / or the exhaust air outlet.

[0047] The air supply unit is arranged near the air inlet, and the air supply unit includes a motor, fan blades and a snail shell, and the fan blades and the motor are located inside the snail shell. After the motor is powered on, it rotates along the rotating shaft, and the fan blades are connected to the rotating shaft. The rotation of the rotating shaft drives the generation of air flow, thereby guiding the indoor air to flow from the air inlet to the circulation outlet and / or the exhaust outlet. The fan blades can rotate at multiple speeds. For example, the fan blades have a first speed and a second speed, and the first speed is greater than the second speed, so that the air supply unit can operate at a first wind speed or a second wind speed, and the first wind speed is greater than the second wind speed. For example, the first wind speed is the highest wind speed, and the second wind speed is the second highest wind speed. The motor of this embodiment is an AC motor, which saves costs while ensuring that the air supply unit can operate at at least two different wind speeds.

[0048] The heating unit is arranged on the downstream side of the air path switching plate to heat the air sucked in from the air inlet. When the heating unit is in the on state, the air passing through the heating unit is heated, and when the heating unit is in the off state, the air passing through the heating unit is not heated. The above-mentioned circulating air outlet is arranged on the downstream side of the heating unit. The heating unit of this embodiment includes two PTC heaters, which are defined as the first heater and the second heater respectively, and the power of the first heater and the second heater is different. In this embodiment, the power of the first heater is higher than the power of the second heater, so that when the heating unit is turned on, at least three different heating powers can be formed according to whether each heater is turned on or off, or whether the two heaters are turned on at the same time, that is, the heating unit forms three gears of high, medium and low. The heating power of the heating unit when the first heater and the second heater are turned on at the same time is defined as the first power, and the heating power of the heating unit when the first heater is turned on and the second heater is turned off is defined as the second power. The first power is greater than the second power, so that the heating unit can operate at the first power or the second power. It is understandable that the heating unit may also include only one heater, and the heating power of the heater may be adjusted by a voltage adjustment method, a current adjustment method, or a resistance adjustment method, so that the heating unit can operate at the first power or the second power.

[0049] The temperature detection unit is disposed upstream of the suction port of the heating unit and is used to detect the temperature Y of the air drawn into the housing from the air supply unit. Here, the temperature of the air is substantially consistent with the indoor space temperature. The temperature detected by the temperature detection unit is defined as the space temperature Y. Furthermore, to more accurately detect the indoor temperature, the temperature detection unit can be disposed at the air inlet of the housing. The temperature detection unit of this embodiment is a temperature detector capable of detecting temperature.

[0050] The storage unit is a memory for storing data related to the heating ventilation fan. In this embodiment, the storage unit is used to store the temperature threshold and the space temperature Y.

[0051] In this embodiment, at least three temperature thresholds are provided, which are temperature W1, temperature W2, and temperature W3, arranged from low to high. The values ​​of the temperature thresholds are set according to actual needs, for example, temperature W1 is 35 degrees, temperature W2 is 45 degrees, and temperature W3 is 50 degrees.

[0052] The space temperature Y is the current temperature of the space where the temperature detection unit is located, detected by the temperature detection unit. When the heating ventilation fan is installed indoors, the target space refers to the space in the room.

[0053] The temperature comparison unit is used to compare the space temperature Y with the temperature threshold and generate a comparison result, so that the control unit controls the operating states of the air supply unit and the heating unit according to the comparison result.

[0054] The control unit is used to control the operation of the entire heating ventilation fan. The control unit includes a heating control unit and a wind speed control unit. The heating control unit is electrically connected to the heating unit and changes the heating power of the heating unit by sending a signal to control the state of the heater. Controlling the state of the heater means controlling the switching between the on and off states of the heater. The wind speed control unit is electrically connected to the motor and controls the speed of the motor by sending a signal to drive the fan blades to rotate, thereby changing the wind speed generated by the air supply unit so that the air supply unit can operate at the first wind speed or the second wind speed.

[0055] The heating ventilator of the disclosed embodiment has a heating mode. In the heating mode, air enters the frame from the air inlet, is heated by the heating unit, and is discharged from the circulating air outlet. The heating mode includes a strong heating stage, a compensation stage, a transition stage, and a bathing stage.

[0056] In the strong heating stage, the heating control unit controls the plurality of heaters of the heating unit to be turned on, that is, the first heater and the second heater are both turned on. At the same time, the wind speed control unit controls the air supply unit to operate at the first wind speed.

[0057] In the compensation phase, the temperature comparison unit compares the temperature threshold stored in the storage unit with the space temperature Y detected by the temperature detection unit and generates a comparison result. The control unit controls the operating states of the heating unit and the air supply unit according to the comparison result.

[0058] For example, when the temperature comparison unit compares that the space temperature Y is lower than the temperature W1, the heating control unit controls the first heater and the second heater to be turned on, and the wind speed control unit controls the air supply unit to operate at the first wind speed.

[0059] For example, when the comparison result of the temperature comparison unit is that the space temperature Y is higher than the temperature W1 and the space temperature Y is lower than the temperature W2, the heating control unit controls the first heater and the second heater to be in the on state, and the wind speed control unit controls the air supply unit to operate at the second wind speed.

[0060] During the transition phase, the heating control unit controls the first heater to be in the on state and the second heater to be in the off state, and the wind speed control unit controls the air supply unit to operate at the second wind speed. It is understood that during the transition phase, the operating state of the heating unit may also be such that the first heater is in the off state and the second heater is in the on state.

[0061] Furthermore, a high temperature protection mechanism is provided in the heating mode. When the temperature comparison unit compares that the space temperature Y is higher than the temperature W3, the heating control unit controls the heating unit to turn off, and the wind speed control unit controls the air supply unit to run at the second wind speed.

[0062] The following describes the operation process of the heating mode of the heating ventilation fan.

[0063] When the heating ventilation fan is started, the indoor air enters from the air inlet under the action of the air supply part. When the heating mode is turned on, the air path switching plate closes the exhaust outlet and opens the circulation outlet. The air entering from the air inlet is brought to the heating part, heated by the heating part and then discharged from the circulation outlet.

[0064] In this embodiment, when the user wants to take a shower and starts the automatic program of the heating ventilation fan, the heating ventilation fan automatically operates in the heating mode.

[0065] After the automatic program is activated, the heating ventilation fan enters the strong heating phase of the heating mode and operates for T1. Preferably, T1 is 5 minutes. During T1, all heaters in the heating unit are turned on, that is, the first heater and the second heater are both turned on. The air supply unit operates at the first wind speed. The generated air is heated by the heating unit and discharged into the bathroom, rapidly heating the bathroom and quickly raising the bathroom temperature.

[0066] To achieve optimal preheating performance for bathrooms of varying sizes and to meet the temperature requirements of bathrooms of varying sizes, this embodiment adds a compensation phase and a transition phase in addition to the enhanced heating phase. After the enhanced heating phase lasts for a duration T1, the indoor temperature rises. The temperature detection unit measures the air currently entering the air supply unit to obtain the room temperature Y. Based on the comparison between the temperature threshold and temperature Y, it determines whether to enter the compensation phase or the transition phase.

[0067] If the bathroom is large, even after the strong heating phase, the room temperature Y may still fall below W2. Therefore, when the temperature comparison unit determines that room temperature Y is lower than W2, the system enters the compensation phase. This lowering of room temperature Y indicates that the bathroom temperature has risen somewhat during the strong heating phase, but continued heating is still necessary. Therefore, during the compensation phase, both the first and second heaters remain on. After a period of operation during the compensation phase, the system enters the next phase.

[0068] When the bathroom is small, or the bathroom has a good preheating effect in the strong heating stage, it is judged according to the comparison result of the temperature comparison part that temperature compensation is not required after the strong heating stage. After the strong heating stage runs for a duration of T1, the compensation stage is skipped and the transition stage is directly entered.

[0069] By detecting the room temperature Y and comparing it with a temperature threshold, the system determines whether to initiate the compensation phase. Even with an AC motor and a limited number of heating levels, it can effectively accommodate bathrooms of varying sizes and heating requirements. Temperature compensation is performed for larger bathrooms, ensuring precise temperature control. This prevents the ineffective heating effect and low temperatures seen in larger bathrooms.

[0070] After the strong heating stage and / or the compensation stage, bathrooms of all sizes can reach a preheated temperature suitable for that bathroom. However, during these two stages, the heating unit remains fully on, i.e., in a strong heating state. Therefore, it takes a while for the temperature to drop from the strong heating state to the relatively weak heating state of the bathing stage, i.e., a temperature more suitable for bathing. Therefore, this embodiment provides a transition stage after the strong heating stage and / or the compensation stage.

[0071] During the transition stage, the heating control unit controls the first heater to be in the on state and the second heater to be in the off state, and the wind speed control unit controls the air supply unit to operate at the second wind speed, so that the temperature in the bathroom can drop quickly to a temperature suitable for bathing, thereby improving the user's bathing experience.

[0072] In this embodiment, the heating mode of the heating ventilation fan includes a strong heating stage, a compensation stage and a transition stage. After the strong heating stage runs for a duration of T1, it is determined to enter the compensation stage or the transition stage based on the comparison result of the temperature comparison unit. Temperature compensation can be performed according to the different sizes of the target space to achieve the purpose of precise temperature control. In addition, it is beneficial for the spatial temperature of the target space to be adjusted quickly to a temperature suitable for entering the next stage.

[0073] In an embodiment of the present disclosure, the temperature threshold stored in the storage unit includes temperature W2; after the strong heating stage runs for a duration of T1, based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than temperature W2, and the compensation stage runs for a duration of T2.

[0074] Specifically, the temperature thresholds stored in the storage unit include temperature W2. After the strong heating stage runs for a period of time T1, the space temperature Y of the target space may be lower than temperature W2. When the space temperature Y is lower than temperature W2, the temperature in the target space still needs to continue to rise.

[0075] If the temperature comparison unit determines that space temperature Y is lower than temperature W2, the heating ventilation fan enters the compensation phase from the strong heating phase and operates for a duration T2. ​​During the compensation phase, both the first and second heaters are on, allowing the target space temperature to rise quickly to a temperature suitable for the next phase.

[0076] After the compensation phase lasts for T2, the next phase begins: the transition phase, which lasts for T3. During the transition phase, the first heater is on, the second heater is off, and the air supply unit operates at the second wind speed, allowing the target space temperature to quickly drop to a temperature suitable for the next phase, which can be a bathing phase.

[0077] After the strong heating stage runs for a length of T1, the compensation stage runs for a length of T2 to perform temperature compensation on the target space. After the compensation stage runs for a length of T2, the transition stage runs for a length of T3, so that the temperature of the target space can drop quickly to a temperature suitable for entering the next stage.

[0078] In an embodiment of the present disclosure, the temperature threshold stored in the storage unit also includes a temperature W3 that is higher than the temperature W2; after the strong heating stage runs for a duration of T1, it is determined based on the comparison result of the temperature comparison unit that the space temperature Y is higher than the temperature W2, and the space temperature Y is lower than the temperature W3, and the transition stage is entered to run for a duration of T2+T3.

[0079] Specifically, the temperature threshold also includes temperature W3, which is higher than temperature W2. Temperature W3 and temperature W2 are set according to actual needs, for example, temperature W2 is 45 degrees Celsius and temperature W3 is 50 degrees Celsius. After the strong heating phase runs for time T1, the temperature detection unit detects the space temperature Y of the target space, and the temperature comparison unit compares space temperature Y with temperature W2 and temperature W3.

[0080] According to the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W2 and the space temperature Y is lower than the temperature W3. The heating control unit controls the first heater to continue to be in the on state and controls the second heater to switch from the on state to the off state. The wind speed control unit controls the air supply part to switch from the first wind speed to the second wind speed. The heating ventilation fan directly enters the transition stage from the strong heating stage and runs for a duration of T2+T3 in the transition stage to reduce the space temperature Y of the target space to a temperature suitable for entering the next stage.

[0081] In an embodiment of the present disclosure, the temperature threshold stored in the storage unit also includes a temperature W1 lower than the temperature W2; in the compensation stage, based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than the temperature W1, and the control unit controls the air supply unit to operate at a first wind speed; based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W1, and the space temperature Y is lower than the temperature W2, and the control unit controls the air supply unit to operate at a second wind speed.

[0082] Specifically, the temperature threshold also includes temperature W1, which is lower than temperature W2. Temperature W1 can be 35 degrees Celsius. After the strong heating phase ends, the space temperature Y detected by the temperature detection unit is compared with temperature W1 and temperature W2. Based on the comparison result, the operating state of the air supply unit is controlled to operate the heating ventilation fan in the first compensation mode or the second compensation mode. In the first compensation mode and the second compensation mode, both the first heater and the second heater are turned on.

[0083] The comparison result of the temperature comparison unit is that the space temperature Y is lower than the temperature W1, indicating that the temperature in the target space is still low. The wind speed control unit controls the air supply unit to continue to operate at the first wind speed, and the heating ventilation fan operates in the first compensation mode to increase the temperature in the target space faster.

[0084] The comparison result of the temperature comparison unit is that the space temperature Y is higher than the temperature W1, and the space temperature Y is lower than the temperature W2, indicating that the temperature in the target space has increased to a certain extent after the strong heating stage, but it still needs to continue to rise. In order to avoid the temperature being too high, the wind speed control unit controls the air supply unit to switch from the first wind speed to the second wind speed, and the heating ventilation fan operates in the second compensation mode to make the temperature in the target space rise quickly to a temperature suitable for entering the next stage.

[0085] In this embodiment, after the strong heating stage is over, the space temperature Y detected by the temperature detection unit is compared with the temperature W1 and the temperature W2, and the heating ventilation fan is controlled to operate in the first compensation mode or the second compensation mode according to the comparison result, which is conducive to the temperature in the target space to rise quickly to a temperature suitable for entering the next stage, and at the same time can avoid the temperature in the target space being too high.

[0086] In the embodiment of the present disclosure, when entering the compensation stage from the strong heating stage, the power of the heating part remains unchanged.

[0087] During the intensive heating phase, the heating control unit turns on both the first and second heaters. During the compensation phase, the heating control unit keeps both heaters on. The heating unit's power remains constant during both the intensive and compensation phases, helping to steadily increase the temperature within the target space.

[0088] In an embodiment of the present disclosure, the heating unit includes a first heater and a second heater, the first heater is used to operate at a first power, and the second heater is used to operate at a second power; in the transition stage, the air supply unit operates at a second wind speed, the first heater is in an on state, and the second heater is in an off state.

[0089] Specifically, the heating unit includes a first heater and a second heater. By independently controlling the on and off states of the first heater and the second heater, the heating unit can quickly switch from the first power to the second power.

[0090] The transition stage is directly entered from the strong heating stage. The heating control unit controls the first heater to continue to be in the on state and controls the second heater to switch from the on state to the off state. The wind speed control unit controls the air supply part to switch from the first wind speed to the second wind speed.

[0091] Entering the transition stage from the first compensation mode, the heating control unit controls the first heater to continue to be in the on state, controls the second heater to switch from the on state to the off state, and the wind speed control unit controls the air supply part to switch from the first wind speed to the second wind speed.

[0092] Entering the transition stage from the second compensation mode, the heating control unit controls the first heater to continue to be in the on state, controls the second heater to switch from the on state to the off state, and the wind speed control unit controls the air supply part to continue to operate at the second wind speed.

[0093] In an embodiment of the present disclosure, the heating mode also includes a bathing stage; the temperature threshold stored in the storage unit includes a temperature W4 which is lower than the temperature W3; in the bathing stage, based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than the temperature W4, and the control unit controls the first heater and the second heater to be in the on state; based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W4, and the space temperature Y is lower than the temperature W3, the control unit controls the first heater to be in the on state and the second heater to be in the off state.

[0094] Specifically, the temperature threshold also includes temperature W4, which is lower than temperature W3 and can be 45 degrees Celsius. After the transition phase ends, the bathing phase begins. The temperature detection unit detects the room temperature Y in the bathroom and compares it with temperature W3 and temperature W4. Based on the comparison results, the operating state of the heating unit is controlled to operate the heating and ventilation fan in the first bathing mode or the second bathing mode. In the first bathing mode and the second bathing mode, the wind speed control unit controls the air supply unit to operate at the second wind speed.

[0095] The comparison result of the temperature comparison unit is that the space temperature Y is lower than the temperature W4, indicating that the temperature in the bathroom is low. The heating control unit controls the first heater and the second heater to be turned on to increase the temperature in the bathroom.

[0096] The comparison result of the temperature comparison unit is that the space temperature Y is higher than the temperature W4 and lower than the temperature W3. The heating control unit controls the first heater to be on and the second heater to be off to prevent the temperature in the bathroom from being too high.

[0097] In this embodiment, the temperature threshold of the bathing stage is the same as the temperature threshold of the strong heating stage. In other embodiments, the temperature threshold of the bathing stage and the temperature threshold of the strong heating stage may be different.

[0098] Furthermore, a high temperature protection mechanism is provided during the bathing stage. When the comparison result of the temperature comparison unit is that the space temperature Y is higher than the temperature W3, the heating control unit controls the first heater and the second heater to be in the off state, and the wind speed control unit controls the air supply unit to continue to operate at the second wind speed.

[0099] In the embodiment, after the transition stage ends, the space temperature Y detected by the temperature detection unit is compared with the temperature W3 and the temperature W4, and the comparison result is used to control the operation of the heating and ventilation fan in the first bathing mode or the second bathing mode, that is, the temperature in the bathroom is maintained at a temperature suitable for bathing, and the temperature in the bathroom is prevented from being too high.

[0100] In the embodiment of the present disclosure, after the transition stage ends, the bathing stage runs for a duration T4; the air supply part keeps the air speed unchanged when the transition stage enters the bathing stage.

[0101] In the transition stage, the air speed control unit controls the air supply part to operate at the second air speed, and in the bathing stage, the air speed control unit controls the air supply part to continue operating at the second air speed. In the transition stage and the bathing stage, the air speed of the air supply part is unchanged.

[0102] In order to avoid the user feeling cold air during bathing due to the large difference in air speed and the change in air speed, the air supply part operates at the second air speed for a duration T4 in the entire bathing stage. Preferably, T4 is 15 minutes.

[0103] In the embodiment of the present disclosure, the heating and ventilation fan also has a hot drying mode. After the heating mode ends, the hot drying mode is entered; the temperature threshold stored in the storage unit includes a temperature W5 lower than the temperature W3; in the hot drying mode, based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than the temperature W5, the control unit controls the first heater and the second heater to be in the open state, and controls the air supply part to operate at the second air speed; based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W5 and the space temperature Y is lower than the temperature W3, the control unit controls the first heater to be in the open state and the second heater to be in the closed state, and controls the air supply part to operate at the second air speed.

[0104] Specifically, when the heating and ventilation fan enters the hot drying mode, the air path switching plate rotates, so that part of the air is discharged to the outside of the room from the exhaust air outlet, and part of the air is heated by the heating unit and then discharged to the room from the circulating air outlet. The hot drying mode is the process that the air enters the frame from the air inlet, part of the air is discharged from the exhaust air outlet, and part of the air is heated by the heating unit and then discharged from the circulating air outlet.

[0105] The temperature threshold also includes the temperature W5, the temperature W5 is lower than the temperature W3, and the temperature W5 can be 45 degrees. After the heating mode ends, the hot drying mode is entered. The temperature detection unit detects the space temperature Y in the bathroom, compares the space temperature Y with the temperature W3 and the temperature W5, and controls the operation state of the heating unit according to the comparison result, so that the heating and ventilation fan operates in the first drying mode or the second drying mode. In the first drying mode and the second drying mode, the air speed control unit controls the air supply part to continue operating at the second air speed.

[0106] The comparison result of the temperature comparison unit is that the space temperature Y is lower than the temperature W5, and the heating control unit controls the first heater and the second heater to be turned on to increase the temperature in the bathroom.

[0107] The comparison result of the temperature comparison unit is that the space temperature Y is higher than the temperature W5 and lower than the temperature W3. The heating control unit controls the first heater to be on and the second heater to be off to prevent the temperature in the bathroom from being too high.

[0108] In hot-dry mode, while achieving minimal ventilation, the bathroom temperature remains stable and doesn't feel stuffy. Furthermore, when users finish showering and then get dressed, they won't feel cold due to the change in mode, reducing the sensation of cold air caused by the change in mode, thus optimizing their physical experience.

[0109] Furthermore, a high temperature protection mechanism is provided in the heat drying mode stage. When the comparison result of the temperature comparison unit is that the space temperature Y is higher than the temperature W3, the heating control unit controls the first heater and the second heater to be in the off state, and the wind speed control unit controls the air supply unit to continue to operate at the second wind speed.

[0110] In this embodiment, after the heating mode ends, the hot drying mode is entered, and the space temperature Y detected by the temperature detection unit is compared with the temperature W3 and the temperature W5. According to the comparison result, the heating ventilation fan is controlled to operate in the first drying mode or the second drying mode, so that a small amount of ventilation is achieved while the temperature in the bathroom is stable and the user will not feel stuffy.

[0111] In an embodiment of the present disclosure, the heating ventilation fan further has a ventilation mode. After the heat drying mode ends, the ventilation mode is entered; the control unit controls the first heater and the second heater to be in the off state, and controls the air supply unit to operate at the second wind speed.

[0112] Specifically, the heating ventilation fan enters the ventilation mode from the heat drying mode. In the ventilation mode, the air path switching plate opens the exhaust outlet and closes the circulation outlet. The indoor air enters the frame from the air inlet and is discharged from the exhaust outlet.

[0113] In ventilation mode, the heating control unit turns off both the first and second heaters, and the wind speed control unit operates the air supply unit at the second wind speed. The air supply unit operates at a relatively low wind speed, and the generated wind is directly exhausted outdoors. This allows for continuous ventilation while consuming little power, maintaining ventilation in the bathroom. This prevents the bathroom from being damp for extended periods, making it less likely to breed bacteria.

[0114] Figure 1 Schematic diagram of a flow chart of a method for controlling a heating ventilation fan according to an embodiment of the present invention. Figure 2This is one of the flow charts of the operation process of the heating ventilation fan according to an embodiment of the present invention. Figure 3 This is the second flow chart of the operation process of the heating ventilation fan according to an embodiment of the present invention.

[0115] Another aspect of the present disclosure further provides a control method for a heating ventilation fan, wherein the structure of the heating ventilation fan is as described above, and the heating mode of the heating ventilation fan includes a strong heating stage, a compensation stage, and a transition stage;

[0116] In heating mode, the heating ventilation fan operates as follows:

[0117] Step 101: Entering the strong heating stage and running for a duration of T1;

[0118] Step 102: After running for a period of time T1, the space temperature Y is detected and it is determined that the space temperature Y is lower than the temperature W2, and the compensation phase is entered;

[0119] Step 103: After the compensation phase runs for a duration of T2, the transition phase begins and runs for a duration of T3.

[0120] The operation process of the heating ventilation fan is described below with reference to a specific embodiment.

[0121] When the heating ventilation fan is activated, indoor air enters through the air inlet under the action of the air supply unit. When the heating mode is on, the air path switching plate closes the exhaust outlet and opens the recirculation outlet. The air entering through the air inlet is brought to the heating unit, heated there, and then discharged from the recirculation outlet. When the heat drying mode is on, the air path switching plate opens both the exhaust outlet and the recirculation outlet. Some air is discharged through the exhaust outlet, while some air is brought to the heating unit, heated, and then discharged from the recirculation outlet. When the ventilation mode is on, the air path switching plate opens the exhaust outlet and closes the recirculation outlet. The air entering through the air inlet is discharged directly through the exhaust outlet.

[0122] In this embodiment, when the user wants to take a shower and starts the automatic program of the heating and ventilation fan, the heating and ventilation fan automatically runs in the following modes in sequence.

[0123] After the automatic program is activated, the heating ventilation fan enters the strong heating phase of the heating mode and operates for a duration T1. Preferably, T1 is 5 minutes. During this duration T1, the heating control unit controls both the first and second heaters to be on, and the wind speed control unit controls the air supply unit to operate at a first wind speed. The generated air is heated by the heating unit and then discharged into the bathroom, rapidly heating the bathroom and quickly raising the temperature in the bathroom.

[0124] To achieve optimal preheating performance for bathrooms of varying sizes and to meet the temperature requirements of bathrooms of varying sizes, this embodiment adds a compensation phase in addition to the enhanced heating phase. After the enhanced heating phase lasts for a duration of T1, the temperature detection unit measures the temperature of the air currently entering the air supply unit to obtain the room temperature Y. Based on the comparison between the temperature threshold and the room temperature Y, a determination is made as to whether to enter the compensation phase.

[0125] When the bathroom is large, the space temperature Y may be lower than the temperature W2 even after the strong heating stage. Therefore, when the comparison result of the temperature comparison unit is that the space temperature Y is lower than the temperature W2, the compensation stage is entered.

[0126] After the heating ventilation fan enters the compensation stage, during the compensation stage, the temperature comparison unit compares the space temperature Y detected by the temperature detection unit with the temperature W1 and the temperature W2. The control unit controls the heating ventilation fan to operate in the first compensation mode for a duration T2 or in the second compensation mode for a duration T2 based on the comparison result.

[0127] During the compensation phase, if the temperature comparison unit compares the room temperature Y to be lower than temperature W1, the heating and ventilation fan switches from the strong heating phase to the first compensation mode. The heating unit and the air supply unit continue to operate in the strong heating phase. Specifically, the heating control unit controls the first and second heaters to remain on, and the air speed control unit controls the air supply unit to continue operating at the first air speed. This allows the bathroom temperature to continue to rise for a period of time, T2, before entering the transition phase. Preferably, T2 is 3 minutes.

[0128] During the compensation phase, the temperature comparison unit compares room temperature Y higher than temperature W1 and lower than temperature W2, indicating that the bathroom temperature has risen somewhat during the strong heating phase, but still needs to be raised. The heating ventilator switches from the strong heating phase to the second compensation mode. The heating control unit keeps the first and second heaters on, but to prevent overheating, the wind speed control unit controls the air supply unit to operate at the second wind speed. The second compensation mode continues for a period of time, T2, before entering the transition phase.

[0129] If the bathroom is small or has been preheated well during the strong heating phase, the heating ventilation fan determines that temperature compensation is not necessary during the compensation phase. Therefore, when the room temperature Y is higher than temperature W2 and lower than temperature W3, the strong heating phase runs for T1, skipping the compensation phase and directly entering the transition phase.

[0130] By detecting the room temperature Y and comparing it with a temperature threshold, the system determines whether to initiate the compensation phase. Even with an AC motor and a limited number of heating levels, it can effectively accommodate bathrooms of varying sizes and heating requirements. Temperature compensation is performed for larger bathrooms, ensuring precise temperature control. This prevents the ineffective heating effect and low temperatures seen in larger bathrooms.

[0131] After the strong heating stage and / or the compensation stage, bathrooms of all sizes can reach a preheated temperature suitable for that bathroom. However, during these two stages, the heating unit remains fully on, i.e., in a strong heating state. Therefore, it takes a while for the temperature to drop from the strong heating state to the relatively weak heating state of the bathing stage, i.e., a temperature more suitable for bathing. Therefore, this embodiment provides a transition stage after the strong heating stage and / or the compensation stage.

[0132] During the transition phase, the heating control unit controls the first heater to remain on and switches the second heater from on to off. The wind speed control unit controls the air supply unit to operate at the second wind speed. The heating ventilation fan operates during the transition phase for a duration T3, preferably 3 minutes. During T3, the bathroom temperature gradually and steadily decreases until it reaches a temperature suitable for bathing, particularly for bathing babies. After the transition phase has completed T3, the heating ventilation fan emits a warning tone, prompting the user to bathe.

[0133] Furthermore, when the bathroom is small and the insulation effect is good, after running for a period of time T1 in the strong heating stage, the comparison result of the temperature comparison unit is that the space temperature Y is higher than the temperature W2, and the space temperature Y is lower than the temperature W3. The heating ventilation fan directly enters the transition stage from the strong heating stage, and the running time in the transition stage is the sum of T2+T3.

[0134] After the transition phase runs for the target duration, the bathing phase begins. During the bathing phase, the temperature comparison unit still compares the stored temperature threshold with the room temperature Y detected by the temperature detection unit. However, unlike the compensation phase, which only performs a single temperature check to ensure adequate heating, the bathing phase requires temperature checks every N1 minutes, preferably 3 minutes. This reduces the number of heating power switching cycles during the bathing phase, optimizing the body's sensation while minimizing the impact of human behavior during the bathing process, resulting in more accurate temperature control.

[0135] In order to avoid the user feeling cold wind during bathing due to the large wind speed difference and the change of wind speed, the air supply unit operates at the second wind speed during bathing. The stable wind speed can reduce the change of wind temperature during bathing, and avoid the AC motor switching from low gear to high gear. Due to the large wind speed difference between low gear and high gear, the user feels cold wind during the gear switching process, providing users with a comfortable bathing process.

[0136] The temperature comparison unit compares the space temperature Y with temperature W3 and temperature W4, and controls the operating state of the heating unit according to the comparison result, so that the heating ventilation fan runs for a duration T4 in the first bathing mode or the second bathing mode. Preferably, T4 is 15 minutes.

[0137] If the comparison result of the temperature comparison unit is that the room temperature Y is lower than temperature W4, the heating control unit controls both the first heater and the second heater to be on, and the heating and ventilation fan to operate in the first bathing mode. If the comparison result of the temperature comparison unit is that the room temperature Y is higher than temperature W4 and lower than temperature W3, the heating control unit controls the first heater to be on, the second heater to be off, and the heating and ventilation fan to operate in the second bathing mode.

[0138] After running for T4 in the shower phase, the heating ventilation fan enters hot drying mode. The air path switching plate rotates, causing some air to be discharged outdoors through the exhaust outlet, while some air is directed to the heating unit for heating before being discharged indoors through the recirculation outlet. In hot drying mode, the air supply unit continues to operate at the relatively low second air speed. The heating unit operates in the same manner as in the shower phase. The temperature comparison unit compares the room temperature Y with temperatures W3 and W5. Based on the comparison results, the heating unit's operating state is controlled to operate the heating ventilation fan in either the first or second drying mode.

[0139] If the temperature comparison unit compares that room temperature Y is lower than temperature W5, the heating control unit turns on both the first and second heaters. If the temperature comparison unit compares that room temperature Y is higher than temperature W5 and lower than temperature W3, the heating control unit turns on the first heater and turns off the second heater. The heating ventilation fan operates in heat-dry mode for a duration T5, preferably 10 minutes.

[0140] During the T5 time period, the temperature detection unit performs a temperature detection every N2 minutes to keep the bathroom temperature stable. In this embodiment, N1 is equal to N2, and in other embodiments, N1 may not be equal to N2. The control of the air supply unit and the heating unit during the bathing stage is postponed to the hot drying mode, which can avoid the user feeling a strong change in temperature because the bathing time exceeds T4. In addition, in the hot drying mode, while achieving a small amount of ventilation, the temperature in the bathroom is stable and will not make the user feel stuffy. In addition, if the user finishes bathing and goes to get dressed, he will not feel cold due to the change of mode, reducing the feeling of cold wind caused by the mode change, etc., thereby optimizing the body sensation.

[0141] In addition, a high-temperature protection mechanism is implemented during the transition phase of heating mode, the shower phase, and the heat-drying mode. Different starting temperatures result in different heating profiles to prevent overheating. Therefore, when the temperature comparison unit compares the room temperature Y higher than temperature W3, the heating ventilation fan enters the high-temperature protection mechanism. The heating control unit turns off both the first and second heaters, and the wind speed control unit operates the air supply unit at the second wind speed. The high-temperature protection mode operates for a duration T6, preferably 10 minutes.

[0142] After showering, a significant amount of water vapor remains in the bathroom. At this point, the heating ventilation fan enters ventilation mode, shutting off the heating unit and operating the air supply at a relatively low second speed. The generated air is then directly discharged outdoors through the exhaust vent. This allows for continuous ventilation while minimizing power consumption, maintaining consistent ventilation in the bathroom. This prevents prolonged dampness and prevents bacterial growth.

[0143] So far, the embodiments of the present invention have been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the present invention.

[0144] It should be noted that any implementations not shown or described in the drawings or the main text of the specification are known to those skilled in the art and are not described in detail. Furthermore, the above definitions of the various components are not limited to the specific structures and shapes described in the embodiments, and can be easily modified or replaced by those skilled in the art.

[0145] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heating ventilation fan, comprising: an air supply unit, configured to draw air into the heating ventilation fan and discharge the air from the heating ventilation fan, the air supply unit having a first wind speed and a second wind speed, the first wind speed being greater than the second wind speed; a heating unit, configured to heat the air sucked in by the air supply unit, the heating unit having a first power and a second power, the first power being greater than the second power; A temperature detection unit, used to detect the space temperature Y of the target space; a storage unit, configured to store a temperature threshold and the space temperature Y detected by the temperature detection unit; a temperature comparison unit, configured to compare the temperature threshold with the space temperature Y; a control unit, configured to control the operating states of the air supply unit and the heating unit according to the comparison result of the temperature comparison unit; The heating ventilation fan has a heating mode, and the air sucked into the heating ventilation fan by the air supply unit is heated by the heating unit and then discharged into the target space; It is characterized by: The heating mode includes: a strong heating stage, a compensation stage and a transition stage; In the strong heating stage, the heating unit operates at the first power and the air supply unit operates at the first wind speed; After the strong heating phase is operated for a time period T1, it is determined whether to enter the compensation phase or the transition phase based on the comparison result of the temperature comparison unit.

2. The heating ventilation fan according to claim 1, characterized in that: The temperature thresholds stored in the storage unit include: temperature W2; After the strong heating phase runs for a time period T1, it is determined based on the comparison result of the temperature comparison unit that the space temperature Y is lower than the temperature W2, and the compensation phase is entered and runs for a time period T2.

3. The heating ventilation fan according to claim 2, characterized in that: After the compensation phase runs for a duration of T2, the transition phase begins and runs for a duration of T3.

4. The heating ventilation fan according to claim 3, characterized in that: The temperature thresholds stored in the storage unit further include: a temperature W3 higher than the temperature W2; After the strong heating phase runs for a duration of T1, based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W2 and lower than the temperature W3, and the transition phase is entered and runs for a duration of T2+T3.

5. The heating ventilation fan according to claim 2, characterized in that: The temperature thresholds stored in the storage unit further include: a temperature W1 lower than the temperature W2; During the compensation phase, Based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than the temperature W1, and the control unit controls the air supply unit to operate at the first wind speed; The control unit controls the air supply unit to operate at the second wind speed based on the comparison result of the temperature comparison unit, determining that the space temperature Y is higher than the temperature W1 and lower than the temperature W2.

6. The heating ventilating fan according to any one of claims 1 to 5, characterized in that: From the strong heating stage to the compensation stage, the power of the heating unit remains unchanged.

7. The heating ventilating fan according to any one of claims 1 to 5, characterized in that: The heating unit includes: a first heater and a second heater, the first heater is configured to operate at the first power, and the second heater is configured to operate at the second power; During the transition phase, the air supply unit operates at the second wind speed, the first heater is in an on state, and the second heater is in an off state.

8. The heating ventilation fan according to claim 7, characterized in that: The heating mode also includes a bathing stage; The temperature thresholds stored in the storage unit include: a temperature W4 lower than the temperature W3; During the bathing phase, Based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than the temperature W4, and the control unit controls the first heater and the second heater to be in an on state; Based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W4 and lower than the temperature W3, and the control unit controls the first heater to be in the on state and the second heater to be in the off state.

9. The heating ventilation fan according to claim 8, characterized in that: After the transition phase ends, the bathing phase begins and runs for a duration of T4; When entering the bathing stage from the transition stage, the wind speed of the air supply part remains unchanged.

10. The heating ventilation fan according to claim 8, characterized in that: The heating ventilation fan also has a heat drying mode; After the heating mode ends, the heat drying mode is entered; The temperature thresholds stored in the storage unit include: a temperature W5 lower than the temperature W3; In the heat drying mode, Based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is lower than the temperature W5, the control unit controls the first heater and the second heater to be in the on state, and controls the air supply unit to operate at the second wind speed; Based on the comparison result of the temperature comparison unit, it is determined that the space temperature Y is higher than the temperature W5 and lower than the temperature W3. The control unit controls the first heater to be in the on state and the second heater to be in the off state, and controls the air supply unit to operate at the second wind speed.

11. The heating ventilation fan according to claim 10, characterized in that: The heating ventilation fan also has a ventilation mode; After the heat drying mode is completed, the ventilation mode is entered; The control unit controls the first heater and the second heater to be in an off state, and controls the air supply unit to operate at the second wind speed.

12. A method for controlling a heating ventilation fan, characterized in that: The heating mode of the heating ventilation fan includes strong heating stage, compensation stage and transition stage; In the heating mode, the heating ventilation fan performs the following steps: Entering the strong heating stage, the running time is T1; After running for a time period T1, the space temperature Y is detected and it is determined that the space temperature Y is lower than the temperature W2, and the compensation phase is entered; After the compensation phase runs for a duration of T2, the transition phase begins and runs for a duration of T3.

13. The control method of the heating ventilation fan according to claim 12, characterized in that: After entering the strong heating stage and running for a period of time T1, The following steps are included: After the operation time T1, the space temperature Y is detected, and it is determined that the space temperature Y is higher than the temperature W2 and lower than the temperature W3, and the transition phase is entered; The operation duration in the transition phase is T2+T3.

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