Fresh air bath heater

Abstract

The utility model provides a fresh air bath heater which comprises a main body, the main body is installed in a ceiling and comprises a shell, at least one fan assembly, a filter assembly and a PTC heating assembly, and the fan assembly, the filter assembly and the PTC heating assembly are contained in the shell; the fan assembly controls external air to enter a room through the fresh air bath heater and controls indoor air to be exhausted out of the room through the fresh air bath heater, the filtering assembly filters the air entering from the outside through the fresh air bath heater, and the PTC heating assembly is used for heating the filtered air; the air inlet and outlet component is connected to the main body through a connecting pipe so as to introduce external air into the main body and discharge the air in the main body out of the fresh air bath heater; and the panel assembly comprises at least two ventilation openings, is mounted on a ceiling or a suspended ceiling, and is connected to the main body through a pipeline. Therefore, a user can obtain fresh air when using the bath heater for heating and bathing, and indoor air can be exhausted and circulated.

Description

Technical Field

[0001] The present disclosure relates to ventilation, and more particularly to a fresh air bathroom heater. Background Art

[0002] The background description provided herein is to generally present the context of the present disclosure. To the extent described in this background section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art against the present disclosure.

[0003] At present, the bathroom heaters on the market have the following defects and shortcomings: the bathroom heaters currently sold on the market do not have fresh air function. When the bathroom heater is used for a long time to heat the indoor air, the air in the bathroom will be dry, oxygen-deficient and not circulated, which will produce bacteria in the bathroom environment, easily causing a decrease in immunity and causing the following diseases.

[0004] For example, it is easy to develop skin diseases, dryness, itching, wrinkles, etc. People's skin is prone to dryness and itching in winter. If the temperature in the "heating room" is too high, it will accelerate the loss of skin moisture, make the skin fibers lose their toughness and break, and then cause some skin diseases.

[0005] For example, respiratory diseases are prone to occur, such as chapped lips, dry nasopharynx, dry cough and hoarseness, etc. If the respiratory tract is dehydrated for a long time, the secretions of the respiratory mucosa will decrease, and dust, bacteria, etc. will take the opportunity to attach to the mucosa, irritate the throat and cause coughing, and easily cause upper respiratory tract infection, bronchitis, bronchial asthma and other health problems.

[0006] For example, cardiovascular diseases are more likely to occur, such as palpitations, chest tightness, dizziness, high blood viscosity, and changes in blood pressure. Overheating of the heating "robs" the body of water, which will increase blood viscosity, cause a drop in blood pressure, angina pectoris and other cardiovascular health problems. In addition, if the temperature difference between indoors and outdoors is too large, it may cause large fluctuations in blood pressure, "overburdening" the coronary arteries, and cause coronary heart disease.

[0007] For example, it is easy to get conjunctivitis, red and dry eyes. In winter, the wind is dry and the air is dry outdoors. If you go back indoors, the high temperature will cause the body to lack water, which will affect the circulation of tears and cause dry eyes. Dry conjunctiva can easily increase the risk of "conjunctivitis". Utility Model Content

[0008] Therefore, there is an urgent need for a bathroom heater that can filter outdoor fresh air to replenish the air in the bathroom to solve the deficiencies in the above-mentioned prior art.

[0009] The present disclosure provides a fresh air bathroom heater, which includes: a main body, which is installed in the ceiling and includes a shell, at least one fan assembly, a filter assembly, and a PTC heating assembly. The shell accommodates at least one fan assembly, a filter assembly, and a PTC heating assembly. The fan assembly controls the external air to enter the room through the fresh air bathroom heater and the indoor air to be discharged to the outside through the fresh air bathroom heater. The filter assembly filters the air entering from the outside through the fresh air bathroom heater. The PTC heating assembly is used to heat the filtered air; an air inlet and outlet component, which is connected to the main body through at least one connecting pipe to introduce external air into the main body and discharge the air in the main body out of the fresh air bathroom heater; a panel assembly, which includes at least two vents and is installed on the ceiling or suspended ceiling, and is connected to the main body through a pipe to achieve air circulation between the indoor air and the fresh air bathroom heater.

[0010] In one embodiment of the present application, the air inlet and outlet component includes a fresh air inlet and an exhaust air outlet. The external air entering the fresh air bathroom heater through the fresh air inlet and the indoor air discharged from the fresh air bathroom heater from the exhaust air outlet pass through at least the same section of the air inlet and outlet component.

[0011] In one embodiment of the present application, the air inlet and outlet member is installed in a wall of a house and penetrates the wall of the house.

[0012] In one embodiment of the present application, the fan assembly includes two groups of fan assemblies, each group of fan assemblies includes a wind wheel and an air duct, the first group of fan assemblies is used to bring external air into the room through the fresh air bathroom heater or to provide warm air to the room, and the second group of fan assemblies is used to exhaust indoor air.

[0013] In one embodiment of the present application, the air circulation between the panel assembly and the fresh air bathroom heater includes the flow of indoor air to the fresh air bathroom heater, the flow of filtered outdoor air to the indoor room, and the flow of air heated in the fresh air bathroom heater to the indoor room.

[0014] In one embodiment of the present application, the filter assembly includes a first-stage filter and a second-stage filter, the first-stage filter is a primary filter, and the second-stage filter is a HEPA filter.

[0015] In one embodiment of the present application, the PTC heating component includes a PTC heating sheet installed at the ventilation opening of the main body and a thermostat for controlling the temperature of the PTC heating block.

[0016] In one embodiment of the present application, the fresh air bathroom heater also includes at least one valve installed in the shell, and each valve is provided with a stepper motor for controlling the opening and closing of the valve.

[0017] In one embodiment of the present application, the fresh air bathroom heater includes two valves, and the opening and closing of the valves realize the conversion of the air duct between the fresh air mode, heating mode and ventilation mode in the fresh air bathroom heater.

[0018] In one embodiment of the present application, the fresh air bathroom heater also includes a junction box, and the junction box is used to place a PCB board.

[0019] The bathroom heater with the function of filtering outdoor fresh air supply in the present application adopts a dual-motor design. One motor supplies fresh air and warm air, and the other motor supplies indoor exhaust. When the outdoor air is supplied to the indoor room, it is filtered through primary and high-efficiency filters, effectively filtering dust, mosquitoes and PM2.5 in the outdoor air, bringing high-oxygen fresh air indoors, and solving a series of problems in which bacteria are easily produced in the closed environment when heating the bathroom, which easily leads to a decrease in immunity and causes diseases.

[0020] By adding a fresh air function design to the bathroom heater, when the user uses the bathroom heater for bathing, filtered fresh oxygenated air is added to change a series of problems in the bathroom, such as dry air, oxygen-deficient air stagnation, and the environment being prone to bacteria, which can easily lead to a decrease in immunity. This improves the air quality of the bathroom environment, creates a healthy bathroom space and a new bathing experience.

[0021] These and other aspects of the disclosure will become apparent from the following description of preferred embodiments taken in conjunction with the accompanying drawings and description thereof, but variations and modifications may be made thereto without departing from the spirit and scope of the novel concepts of the disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present disclosure will be more fully understood from the detailed description and the accompanying drawings. These drawings illustrate one or more embodiments of the present disclosure and, together with the written description, are used to explain the principles of the present disclosure. Wherever possible, the same reference numerals are used throughout the drawings to represent the same or similar elements of the embodiments, and wherein:

[0023] Figure 1 It is a schematic diagram of the installation structure of a fresh air bathroom heater according to an exemplary embodiment of the present disclosure, wherein the fresh air bathroom heater is shown in a disassembled state.

[0024] Figure 2 It is a schematic exploded view of the main body of a fresh air bathroom heater according to an exemplary embodiment of the present disclosure.

[0025] Figure 3 It is a schematic diagram of an assembled main body of a fresh air bathroom heater according to an exemplary embodiment of the present disclosure, in which a filter assembly is shown separately.

[0026] Figure 4 2 is a diagram showing different orientations of a PTC heating component according to an exemplary embodiment of the present disclosure.

[0027] Figure 5 It is a schematic diagram of the interior of the main body of a fresh air bathroom heater according to an exemplary embodiment of the present disclosure.

[0028] Figure 6 It is a schematic diagram of a valve of a fresh air bathroom heater according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] Hereinafter, the present disclosure will be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the present disclosure are shown. However, the present disclosure can be implemented in different embodiments and should not be construed as being limited to the embodiments described herein. These embodiments provided by the present disclosure are to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. In the accompanying drawings, for clarity, the thickness and region of the layer may be magnified. Throughout the specification, the same reference numerals are used to represent the same elements. For different embodiments, elements may have different relationships and different positions.

[0030] The fresh air bathroom heater in the present application adopts at least two motor structures, preferably a dual-motor configuration, one motor supplies fresh air and warm air, and the other motor supplies indoor exhaust, so that users can get fresh air while using the bathroom heater for heating and bathing, and can also realize the discharge and circulation of indoor air, thereby improving the air quality of the bathroom environment, a healthy bathroom use space and a new bathing experience.

[0031] Figure 1 It is a schematic diagram of the installation structure of a fresh air bathroom heater according to an exemplary embodiment of the present disclosure, wherein the fresh air bathroom heater is shown in a disassembled state. Figure 2 It is a schematic exploded view of the main body of a fresh air bathroom heater according to an exemplary embodiment of the present disclosure. Figure 3 It is a schematic diagram of an assembled main body of a fresh air bathroom heater according to an exemplary embodiment of the present disclosure, in which a filter assembly is shown separately.

[0032] like Figures 1 to 3As shown, the fresh air bathroom heater 1 may include: a main body 11, which is installed in the ceiling and includes a shell 111, at least one fan assembly 112, a filter assembly 113, and a PTC heating assembly 114. The shell 111 accommodates at least one fan assembly 112, a filter assembly 113 and a PTC heating assembly 114. The fan assembly 112 controls the external air to enter the room through the fresh air bathroom heater 1 and the indoor air to be discharged to the outside through the fresh air bathroom heater 1. The filter assembly 113 filters the air entering from the outside through the fresh air bathroom heater 1, and the PTC heating assembly 114 is used to heat the filtered air; an air inlet and outlet component 12, which is connected to the main body 11 through at least one connecting pipe to introduce external air into the main body 11 and discharge the air in the main body 11 out of the fresh air bathroom heater 1; a panel assembly 13, including at least two vents, and is installed on the ceiling or suspended ceiling (roof ceiling) 30, and is connected to the main body 11 through a pipe to achieve air circulation between the indoor air and the fresh air bathroom heater 1.

[0033] In one embodiment, the main body 11 of the fresh air bathroom heater 1 can be hidden in the ceiling or suspended ceiling 30, or partially exposed outside the ceiling or suspended ceiling 30, and the fan assembly 112 controls the flow of air to achieve any one of the bathroom heater mode, fresh air mode and exhaust mode, or a combination of the bathroom heater mode, fresh air mode and exhaust mode. The fresh air bathroom heater 1 and the external air are circulated through the air inlet and outlet components 12, and the air inlet and outlet components 12 can be a single component, or can be composed of a separate air outlet component and an air inlet component.

[0034] The fresh air bathroom heater 1 and the indoor air achieve gas circulation through the panel assembly 13. The panel assembly 13 can be a single component or a component. It preferably includes two vents, such as a warm air / fresh air outlet and an indoor air inlet, or it can include three indoor air inlet, warm air outlet and fresh air outlet, and so on. The panel assembly 13 in the present application can be installed in the ceiling or suspended ceiling 30, or partially exposed outside the ceiling or suspended ceiling 30. The panel assembly 13 can be connected to the vent of the main body 11 through a pipe, or it can be directly connected to the vent of the main body 11. The panel assembly 13 may include a rectangular air inlet 134 and a warm air / fresh air outlet 133, a panel main body component 132 that is convenient for connecting the vent to the pipe, and a panel 131 that fixes the vent to the ceiling or suspended ceiling 30. The present application does not limit the shape and number of the vents, and circular, polygonal or irregular shapes are all possible.

[0035] In one embodiment of the present application, the air inlet and outlet component 12 is a component for the circulation of the fresh air bathroom heater and the external air, including a fresh air inlet 121 and an exhaust outlet 122. The external air can enter the fresh air bathroom heater 1 through the fresh air inlet, and the indoor air can be discharged from the exhaust outlet to the outside of the fresh air bathroom heater 1. In this embodiment, the fresh air inlet 121 and the exhaust outlet 122 can be integrated into a unified component. Preferably, the external air entering the fresh air bathroom heater 1 and the indoor air discharged from the fresh air bathroom heater 1 can pass through the same section of the air inlet and outlet component 12 together. For example, multiple air inlet and outlet components are connected to different air outlets of the fresh air bathroom heater 1, and then merged into a circulation component, and then connected to the outside through different outlets. Alternatively, an air inlet and outlet component is connected to the air outlet of the fresh air bathroom heater 1 by means of a guide port, thereby realizing the merging of different air together and flowing through the same section of the air inlet and outlet components together.

[0036] In one embodiment of the present application, since the fresh air bathroom heater 1 is installed at the ceiling or suspended ceiling, the air inlet and outlet components 12 can also be similarly concealedly installed, thereby achieving an overall beautiful visual effect. In this way, the air inlet and outlet components 12 can be directly connected to the outside air through the house wall 20 in the ceiling or suspended ceiling 30, and installed in the house wall 20, with only the air outlet exposed to the outside.

[0037] In one embodiment of the present application, the fan assembly 112 includes two groups of fan assemblies 112. The two groups of fans can be arranged side by side or along the diagonal of the housing 111, so that the arrangement of the fan assembly 112 in the housing is more compact.

[0038] Each group of fan assemblies 112 includes a wind wheel 1121 and an air duct 1122. The wind wheel 1121 guides the flow of air in the shell 111. Preferably, the flow of air in the shell 111 is guided by the air duct 1122 to effectively realize the flow of air in different modes of the fresh air bathroom heater 1. For example, the first group of fan assemblies can be used to bring external air into the room through the fresh air bathroom heater 1 or to realize indoor warm air supply, and the second group of fan assemblies is used to exhaust indoor air, or the first group of fans and the second group of fans jointly realize the circulation of indoor air.

[0039] The main body 11 has multiple vents to allow air to enter and exit the fresh air bathroom heater. The main body may include multiple vents. This embodiment is described by taking four vents as an example. For example, the first vent 115 to the fourth vent 118 are arranged in a clockwise direction, such as Figure 2 shown.

[0040] In detail, as shown in the figure, in one case, outdoor air enters the main body 11 of the fresh air bathroom heater 1 from the first vent 115, enters the first set of fan components through the filter assembly 113, and leaves the main body 11 through the fourth vent 118 under the guidance of the first set of fan components. In another case, indoor air can enter the main body 11 of the fresh air bathroom heater 1 from the third vent 117, pass through the second set of fan components, and be discharged from the fresh air bathroom heater 1 through the third vent 117. In yet another case, indoor air can enter the main body 11 of the fresh air bathroom heater 1 from the second vent 116, enter the fourth vent 118 through the second set of fan components and the valve 14, be heated at the fourth vent 118, and then be discharged from the fresh air bathroom heater 1.

[0041] In one embodiment of the present application, as described above, the fresh air bathroom heater 1 can realize multiple ventilation modes. As for the position of the panel assembly 13, taking three vents as an example, the air circulation between the panel assembly 13 and the fresh air bathroom heater 1 can include the flow of indoor air through the indoor air inlet to the fresh air bathroom heater 1, the flow of filtered outdoor air through the fresh air outlet to the indoor, and the flow of air heated in the fresh air bathroom heater 1 through the warm air outlet to the indoor.

[0042] In one embodiment of the present application, the filter assembly 113 includes a first-stage filter 1131 and a second-stage filter 1132, wherein the first-stage filter 1131 is a primary filter, and the second-stage filter 1132 is a HEPA filter. For example, the primary filter is mainly used to filter dust particles and mosquitoes larger than 5 μm, and the high-efficiency filter is mainly used to capture dust particles and various suspended matter smaller than 0.5 μm. Its filtration efficiency is as high as 99.95%, which can achieve a good filtration effect on PM2.5 dust particles.

[0043] In one embodiment of the present application, Figure 4 As shown, the PTC heating component 114 can be installed at the air outlet of the main unit, for example, it can be installed at the fourth vent 118, and is used to heat the air. For example, it can heat the filtered fresh air entering from the outside, thereby providing hot air with a higher temperature. The PTC heating component 114 can include a PTC heating sheet 1141 installed at the vent of the main body 11 and a thermostat 1142 for controlling the temperature of the PTC heating block. As shown in the figure, the PTC heating component 114 can be the main heat source for providing warm air, and a ceramic PTC heating sheet can be used, which has high thermal efficiency and controllable temperature, and a 100C° temperature sensor can be built in, thereby making the PTC heating component safer and more reliable.

[0044] In one embodiment of the present application, Figure 5 and 6As shown, the fresh air bathroom heater 1 also includes a plurality of valves 14, for example, valves 14 installed on the housing 111, or valves 14 installed on the internal components of the housing 111. The number of valves 14 can be one or more, preferably, two valves 14 are included. A stepper motor 15 is provided on each valve 14 to control the opening and closing of the valve 14. The first valve 141 and the second valve 142 can be opened and closed respectively, so that the conversion of the air duct 1122 between the fresh air mode, the heating mode and the ventilation mode in the fresh air bathroom heater 1 can be realized.

[0045] In one embodiment of the present application, Figure 2 As shown, the fresh air bathroom heater 1 also includes a junction box 16, which is used to place a PCB board used to control the fresh air bathroom heater circuit. The junction box can be made of PC material injection molding, and the flame retardant is V0 level to achieve safe and reliable line control.

[0046] In one embodiment of the present application, the air flow mode in the fresh air bathroom heater is described in detail with reference to the accompanying drawings.

[0047] As shown in the figure, when the fresh air bathroom heater turns on the fresh air mode, external air enters from the outside through the air inlet and outlet component 12, first reaches the first vent 115 of the fresh air bathroom heater main body 11, and then enters the main body 11, passes through the filter component 113 in the main body 11 and enters the first group of fan components, under the guidance of the wind wheel 1121, passes through the air duct 1122 to reach the fourth vent 118, and leaves the main body 11 at the fourth vent 118, or can be heated by the PTC heating module at the fourth vent 118 to increase the temperature, leave the main body 11 at a higher temperature, and enter the room through the fresh air outlet of the panel component 13.

[0048] As shown in the figure, when the fresh air bathroom heater turns on the warm air mode, the internal air enters through the indoor inlet of the panel assembly 13, first reaches the third vent 117 of the fresh air bathroom heater main body 11, and then enters the main body 11, passes through the second group of fan assemblies in the main body 11, and under the guidance of the wind wheel 1121 of the second group of fan assemblies, passes through the air duct 1122 to reach the second valve 142. The second valve 142 is already in an open state driven by the motor. After passing through the valve, the air reaches the fourth vent 118, where it is heated by the PTC heating module to increase the temperature, leaves the main body 11 at a higher temperature, and enters the room again through the warm air outlet of the panel assembly 13.

[0049] As shown in the figure, when the fresh air bathroom heater turns on the exhaust mode, the internal air enters through the indoor inlet of the panel assembly 13, first reaches the third vent 117 of the fresh air bathroom heater main body 11, and then enters the main body 11, passes through the second group of fan assemblies in the main body 11, and under the guidance of the wind wheel 1121 of the second group of fan assemblies, passes through the air duct 1122 to reach the second vent 116, and is discharged to the outside of the fresh air bathroom heater through the air inlet and outlet component 12.

[0050] The above modes of the fresh air bathroom heater in this application are not mutually exclusive and can be used in combination. For example, the warm air mode and the fresh air mode are activated together, so that fresh air from the outside can be replenished and indoor air can be circulated. Alternatively, the fresh air mode and the exhaust mode are activated together, so that the ventilation and flow of indoor air can be accelerated.

[0051] The terms used here are only for the exemplary purposes of the present disclosure and should not be interpreted as limiting the meaning or scope of the present disclosure. As used in this specification, unless a specific example is clearly indicated in the context, the singular form may include the plural form. Moreover, the expressions "including" and / or "including" used in this specification neither limit the shapes, numbers, steps, actions, operations, components, elements and / or their groups mentioned, nor exclude the occurrence or addition of one or more other different shapes, numbers, steps, operations, components, elements and / or their groups, or the addition of these. For ease of description, spatially related terms such as "above...", "above...", "upper", "under...", "under...", "below...", "lower", etc. are used here to describe the relationship between an element or feature as shown in the figure and another element (element) or a feature (feature). It should be understood that, in addition to the orientation illustrated in the figure, spatially related terms are intended to include different orientations of devices (such as packaging) in use or operation. For example, if the device in the figure flips, the element described as below, below or below other elements or features is oriented above or above another element or feature. Thus, the exemplary term "over" can include both an orientation of "above" and "below."

[0052] As used herein, terms such as "first", "second", etc. are used to describe various components, assemblies, regions, layers and / or parts. However, it is clear that components, assemblies, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one component, component, region, layer or part from another component, component, region, layer or part. Therefore, a description of a first component, component, region, layer or part may also refer to a second component, component, region, layer or part without departing from the scope of this disclosure.

[0053] The above description of the exemplary embodiments of the present disclosure is presented only for the purpose of illustration and description, and is not intended to be exhaustive or to limit the present disclosure to the precise form disclosed. In accordance with the above teachings, many modifications and variations are possible. The embodiments are selected and described to explain the principles of the present disclosure and its practical application, so that other technical personnel in the field can utilize the present disclosure and various embodiments, and have various modifications suitable for the specific purposes contemplated. Without departing from the spirit and scope of the present disclosure, replacement embodiments will become apparent to those skilled in the art to which the present disclosure belongs. Therefore, the scope of the present disclosure is limited by the appended claims rather than by the foregoing description and the exemplary embodiments described therein.

Claims

1. A fresh air bathroom heater, characterized in that: The fresh air bathroom heater includes: The main body is installed in the ceiling and includes a shell, at least one fan assembly, a filter assembly, and a PTC heating assembly. The shell accommodates at least one fan assembly, a filter assembly, and a PTC heating assembly. The fan assembly controls the external air to enter the room through the fresh air bathroom heater and the indoor air to be discharged to the outside through the fresh air bathroom heater. The filter assembly filters the air entering from the outside through the fresh air bathroom heater. The PTC heating assembly is used to heat the filtered air. An air inlet and outlet component, which is connected to the main body through at least one connecting pipe to introduce external air into the main body and discharge the air in the main body out of the fresh air bathroom heater; The panel assembly includes at least two vents and is installed on the ceiling or suspended ceiling and connected to the main body through a pipe to achieve air circulation between the indoor air and the fresh air bathroom heater.

2. The fresh air bathroom heater as claimed in claim 1, characterized in that: The air inlet and outlet components include a fresh air inlet and an exhaust air outlet. The external air entering the fresh air bathroom heater through the fresh air inlet and the indoor air discharged from the fresh air bathroom heater through the exhaust air outlet pass through at least the same section of the air inlet and outlet components.

3. The fresh air bathroom heater as claimed in claim 1, characterized in that: The air inlet and outlet components are installed in the wall of the house and penetrate the wall of the house.

4. The fresh air bathroom heater as claimed in claim 3, characterized in that: The fan assembly includes two groups of fan assemblies, each group of fan assemblies includes a wind wheel and an air duct, the first group of fan assemblies is used to bring external air into the room through the fresh air bathroom heater or to provide indoor warm air supply, and the second group of fan assemblies is used to exhaust indoor air.

5. The fresh air bathroom heater according to any one of claims 1 to 4, characterized in that: The air circulation between the panel assembly and the fresh air bathroom heater includes the flow of indoor air to the fresh air bathroom heater, the flow of filtered outdoor air to the indoor room, and the flow of air heated in the fresh air bathroom heater to the indoor room.

6. The fresh air bathroom heater according to any one of claims 1 to 4, characterized in that: The filter assembly comprises a first-stage filter and a second-stage filter, wherein the first-stage filter is a primary filter and the second-stage filter is a HEPA filter.

7. The fresh air bathroom heater according to any one of claims 1 to 4, characterized in that: The PTC heating component includes a PTC heating sheet installed at the vent of the main body and a thermostat for controlling the temperature of the PTC heating block.

8. The fresh air bathroom heater as claimed in claim 7, characterized in that: The fresh air bathroom heater also includes at least one valve installed in the shell, and each valve is provided with a stepping motor for controlling the opening and closing of the valve.

9. The fresh air bathroom heater according to any one of claims 1 to 4, characterized in that: The fresh air bathroom heater comprises two valves, and the opening and closing of the valves realize the switching of the air duct between the fresh air mode, the heating mode and the ventilation mode in the fresh air bathroom heater.

10. The fresh air bathroom heater according to any one of claims 1 to 4, characterized in that: The fresh air bathroom heater also includes a junction box, which is used to place a PCB board.

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