CN215581990U - Electronic device - Google Patents

Abstract

The utility model discloses an electronic device, comprising: the air duct comprises an air inlet and an air outlet; the temperature sensor is arranged in the air duct and used for detecting the ambient temperature; and the air outlet is close to the chip. By arranging the temperature sensor inside the air duct of the electronic equipment, the abrasion of the temperature sensor can be avoided; therefore, the temperature sensor is protected, and the environment temperature can be accurately detected.

Description

Electronic device

Technical Field

The present disclosure relates to the field of ambient temperature detection, and more particularly, to an electronic device.

Background

With the development of science and technology, electronic devices are applied more and more, the electronic devices have certain requirements on the environmental temperature, and the change of the environmental temperature can affect the performance of the electronic devices, so the detection of the environmental temperature of the electronic devices is very important. In the related art, a thermal sensor is often disposed on an outer wall of an electronic device to be in contact with an external environment, thereby measuring an ambient temperature. In the method, the heat-sensitive sensor is exposed outside and is easy to damage; meanwhile, the temperature of the outer wall can be conducted to the thermal sensor, and the temperature of the outer wall can be conducted to the external environment, so that the temperature of the thermal sensor is inconsistent with the actual environment temperature. Still another method applied to the mobile phone is to use a plurality of thermal sensors (such as thermistors) inside the device to fit/estimate the external environment temperature, but the method has poor accuracy and is difficult to debug. At present, no equipment which can protect a thermosensitive sensor from being damaged and can accurately detect the environmental temperature of electronic equipment exists.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides an electronic device including: an air duct; and the temperature sensor is arranged in the air duct and used for detecting the ambient temperature.

In one embodiment, the air duct includes an air inlet and an air outlet; the electronic device further includes: and the air circulation device is used for enabling air outside the air channel to enter the air channel from the air inlet and to be discharged out of the air channel from the air outlet.

In an embodiment, the air circulating device is disposed between the temperature sensor and the air outlet of the air duct.

In an embodiment, the air circulation device is provided with a wind power adjustment device.

In an embodiment, the electronic device further comprises: a chip; the air outlet is arranged close to the chip.

In an embodiment, the electronic device further comprises: the control unit is in communication connection with the temperature sensor and is used for acquiring the ambient temperature detected by the temperature sensor; and the control unit is in communication connection with the air circulation device and is used for controlling the air circulation device.

In an embodiment, a sealing cover is disposed at the air inlet and/or the air outlet.

In one embodiment, the sealing cover is connected with the control unit, and the control unit is used for controlling the opening and closing of the sealing cover.

In an embodiment, a dust placing net is arranged at the air inlet and/or the air outlet.

In an embodiment, the electronic device further comprises: the mounting rack is arranged in the air duct; the temperature sensor is installed in the mounting bracket, just the temperature sensor with the inner wall interval in wind channel sets up.

Through this kind set up temperature sensor inside electronic equipment's wind channel, both protected temperature sensor like this, avoided wearing and tearing, damage to can be accurate detect ambient temperature.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

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

FIG. 1 is a schematic diagram of an electronic device shown in accordance with an exemplary embodiment.

FIG. 2 is a schematic diagram of another electronic device shown in accordance with an example embodiment.

FIG. 3 is a schematic diagram of another electronic device shown in accordance with an example embodiment.

FIG. 4 is a schematic diagram of another electronic device shown in accordance with an example embodiment.

FIG. 5 is a schematic diagram of another electronic device shown in accordance with an example embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1 is a schematic diagram of an electronic device according to an example embodiment, and as shown in fig. 1, the electronic device 100 may include: an air duct 120; the temperature sensor 110 is disposed in the air duct 120 and is configured to detect an ambient temperature.

In the embodiment of the present disclosure, the electronic device 100 may include electronic products such as a mobile phone, a computer, a camera, a television, a robot, and the like. The air duct 120 is disposed inside the electronic device 100, the air duct 120 may be an air path of the electronic device 100, and the air duct 120 may be a straight-tube channel with openings at two ends; or a pocket-type channel with an opening; it is also possible to have two open curved channels; the air duct 120 may communicate with an environment external to the electronic device 100 through the opening. The shape and size of the air duct 120 can be adjusted according to the characteristics of the electronic device 100 or the actual application.

The temperature sensor 110 may include a thermocouple, a thermistor, a resistance temperature detector, an IC temperature sensor, or the like. The thermocouple sensor has the advantages that the sensitivity is independent of the thickness of the material, so that the thermocouple sensor can be applied to narrow environments; the thermistor is a temperature sensor made of semiconductor materials, and has the advantages of very small volume and quick response to temperature change; the resistance temperature detector has the advantages of large detection temperature range; the IC temperature sensor comprises an analog output type and a digital output type, wherein the analog output sensor simulates the temperature sensor and does not need an additional linearization circuit to calibrate the nonlinearity of the thermistor; digital output sensors may be implemented in applications where the output of an analog temperature sensor is coupled to an analog-to-digital converter. Different temperature sensors have different performances and characteristics, and different temperature sensors can be selected according to actual application scenes and requirements. The temperature sensor 110 is disposed in the air duct 120, and the ambient temperature in the air duct 120 is detected by the temperature sensor 110. The air duct 120 is in communication with the environment surrounding the electronic device 100, so the temperature detected by the temperature sensor 110 is the ambient temperature surrounding the electronic device 100.

By thus disposing the temperature sensor 110 inside the air duct 120 of the electronic device 100, wear of the temperature sensor 110 can be avoided; because in the prior art, in order to detect the ambient temperature of the electronic device, the temperature sensor is disposed outside the electronic product, so that the electronic product is easily damaged during the use process. At present, in a mobile phone, a plurality of temperature sensors inside equipment are used for fitting/estimating the external environment temperature, so that the defect is poor in accuracy and difficult to debug. In the present embodiment, the temperature sensor 110 is disposed in the air duct 120, so that the temperature sensor 110 is protected, and the debugging is facilitated. Moreover, since the air duct 120 is an air path, the air duct 120 is communicated with the external environment, and the temperature sensor 110 obtains the ambient temperature of the electronic device 100 by measuring the temperature of the air in the air duct 120, so that the measurement result is more accurate.

FIG. 2 is a schematic diagram of another electronic device according to an example embodiment, such as the electronic device shown in FIG. 2, in which a duct 120 may include an inlet 121 and an outlet 122; the electronic device 100 may further include: and the air circulating device 130 is used for enabling air outside the air duct 120 to enter the air duct 120 from the air inlet 121 and to be discharged out of the air duct 120 from the air outlet 122.

In some embodiments, the air inlet 121 and the air outlet 122 of the air duct 120 may be openings of the electronic device 100, the air duct 120 may be a cylindrical cavity, and the air inlet 121 and the air outlet 122 are disposed on two opposite surfaces of the electronic device 100, so that the air duct 120 communicates with the surrounding environment of the electronic device 100. The air duct is more beneficial to the circulation of air, has smaller obstruction to the air flow and has better ventilation effect.

In other embodiments, the air duct 120 may have only one opening, that is, the air duct 120 is a pocket-shaped duct with one closed end and one open end, and the air inlet and the air outlet are realized through one opening. The air duct can occupy smaller space, especially the available space of some electronic equipment with smaller relative volume, such as mobile phones, mini cameras and the like, is smaller, and the air duct can be used under the condition of smaller space.

In other embodiments, the air duct 120 may be a curved or multi-segmented bent channel, and the air outlet 122 and the air inlet 121 may be on the same surface of the electronic device 100 or on the adjacent surfaces of the electronic device. Because the electronic device needs to install a large amount of hardware devices, the available space is not large, and the air duct 120 can be arranged to avoid the positions of other elements, the air duct 120 can be arranged by utilizing the rest space as much as possible, and the air duct 120 can be a bent passage, so that the air duct 120 can be adjusted according to the situation, the passage situation can be met, the air outlet 122 and the air inlet 121 of the air duct 120 are separated, the space is saved, and meanwhile, the air circulation is facilitated.

In the disclosed embodiment, the air circulation device 130 is a device that can circulate air in the air duct 120, such as a fan, a bellows, or a piston ventilation device. For example, when the air moving device 130 is a bellows, the bellows operates on the principle of moving air through the pull rod in the bellows. The bellows is an air duct 120, and when the pull rod moves, air in the air duct 120 is discharged to the outside of the electronic device 100, and air in the outside environment enters the air duct 120. When the air circulation device 130 is a fan, the fan rotates to exchange air in the air duct 120 with the outside; the air circulation device 130 is a piston ventilation device, such as a gas cylinder, which draws air from the air channel 120 to allow air from the external environment to enter the air channel 120. The type and mode of the air circulation device are not limited, because the electronic device has various forms and can realize various functions, and it is a main objective that the air circulation device can be selected according to practical application conditions, and the air in the air duct 120 can be exchanged with the air in the surrounding environment of the electronic device 100 by arranging the air circulation device.

The air circulating device 130 can exhaust air in the air duct 120 through the air outlet 122 of the air duct 120, so that air in the external environment enters and passes through the air duct 120 through the air inlet 121. Because the electronic device 100 generates heat during use, the air in the air duct 120 transfers the heat of the electronic device 100, so that the temperature in the air duct 120 is different from the ambient temperature around the electronic device 100. By arranging the air circulation device 130, when the temperature is detected, the original air in the air duct 120 is discharged, so that the air of the surrounding environment enters the air duct 120, the consistency between the air in the air duct 120 and the air of the environment of the electronic device 100 is ensured, the temperature value detected by the temperature sensor 110 is consistent with the air temperature value in the environment of the electronic device 100, and the accuracy of the temperature detection of the temperature sensor 110 is further ensured.

In other embodiments, if shown in fig. 2, the air circulation device 130 may be disposed between the temperature sensor 110 and the air outlet 122 of the air duct 120.

The temperature of the air can be slightly changed by the air circulation friction, and in order to ensure the accuracy of temperature detection and reduce errors as much as possible, the air circulation device 130 is arranged between the temperature sensor 110 and the air outlet 122, so that it can be ensured that when the air of the surrounding environment enters the air duct 120 through the air inlet 121, the temperature sensor 110 is contacted first, and thus the temperature sensor 110 can detect the temperature of the air which does not pass through the air circulation device 130. If the air passes through the air circulation device 130 and then passes through the temperature sensor 110, the air is contacted with the air circulation device 130 to generate friction, which affects the air temperature, further affects the detection result, and makes the detection result have larger error. The temperature sensor 110 is disposed at an end close to the air inlet 121 of the air duct 120, so that the temperature sensor 110 directly detects the temperature of the air in the external environment, and the accuracy of the detection result is further ensured. The solution of disposing the temperature sensor 110 at one end of the air outlet 122 is certainly not excluded.

In other embodiments, among others, the air circulation device 130 may be provided with a wind power adjusting device. The control unit may control the rate of the air circulation device 130 by means of the wind force adjustment device. By adjusting the wind, the time of ventilation in the air duct 120 can be controlled. If the velocity of the air moving device 130 is greater, the shorter the time it takes to ventilate the duct 120, and the faster the temperature is sensed.

In still other embodiments, the electronic device 100 may further include: a chip; the vent 122 may be disposed adjacent to the chip. Many chips are disposed in the electronic device 100, and during the operation of the electronic device 100, the chip is one of the main heat sources, and if the chip is located relatively close to the temperature sensor 110, the chip generates heat to affect the detection of the temperature sensor 110. In order to ensure that the heat generated by the chip is transferred to the temperature sensor 110 as little as possible, the chip is disposed at the air outlet 122 of the air duct 120. On the other hand, the air duct 120 also has a heat dissipation function, so that the chip is disposed near the air outlet 122 to achieve heat dissipation, and the chip and the temperature sensor 110 are disposed at an interval, so that heat generated by the chip is prevented from interfering with the detection result of the temperature sensor 110, and the accuracy of the detection result is further ensured.

In other embodiments, as shown in fig. 2, the electronic device 100 may further include: the control unit 140, the control unit 140 is in communication connection with the temperature sensor 110, and is used for acquiring the ambient temperature detected by the temperature sensor 110; also, a control unit 140 is communicatively coupled to the air-moving device 130 for controlling the air-moving device 130.

In the present embodiment, the control unit 140 is connected to the temperature sensor 110 and the air circulation device 130 through communication connection, which includes a wired connection form and a wireless connection form. The control unit 140 may receive the detection result of the temperature sensor 110, and may control the electronic device 100 based on the detection result, for example, the detection result may be displayed on a display screen of the electronic device or a related device, and the operation mode of the electronic device 100 may also be adjusted according to the ambient temperature. The switches of the temperature sensor 110 and the air circulation device 130 may be controlled, and the temperature sensor 110 and the air circulation device 130 may be turned off if it is not necessary to detect the temperature and turned on when it is necessary.

The control unit 140 may control the temperature sensor 110 and the air circulation device 130 to be turned on or off, respectively. In some embodiments, when the temperature needs to be detected, the air circulation device 130 and the temperature sensor 110 may be turned on simultaneously, and the temperature sensor 110 may perform a one-time or continuous detection. In other embodiments, the air circulation device 130 may be turned on to exhaust the air in the air duct 120, so as to complete the air exchange, so that the air in the air duct 120 is all the air of the surrounding environment, and then the temperature sensor 110 starts to detect the ambient temperature. It takes a certain time for the air circulating device 130 to discharge the air in the wind tunnel 120, and the time is related to the size of the wind tunnel and the wind speed. If the air circulation device 130 is turned on while the temperature is being detected, the ambient air does not enter the duct 120 at this time, and the detected temperature may have a certain error. By controlling the temperature sensor 110 to be turned on after the air circulating device 130 is turned on for a period of time, which can be adjusted according to the wind power, that is, if the wind speed is fast, the time for discharging the air in the wind tunnel 120 is short, which can be shorter, if 2 s; if the wind speed is slow, the time for discharging the air in the wind tunnel 120 is long, and the time interval may be longer, if 5 s. By starting the air circulation device 130 first and then performing the detection, the accuracy of the detection can be improved. Certainly, the temperature sensor 110 and the air circulation device 130 may be simultaneously turned on, and the temperature sensor 110 continuously detects the temperature value, and the control unit 140 reads the value after obtaining the stable temperature value, so as to ensure the accuracy of the result.

In other embodiments, a sealing cover may be disposed at the air inlet 121 and/or the air outlet 122. The sealing cover can be a sealing film structure, or a sealing device made of metal or plastic materials, and the like. The electronic device 100 may have waterproof performance when in use, and if the air duct 120 is in an open state, when encountering a water environment, water can enter the electronic device 100 through the air duct 120 to damage the electronic device 100, so that the sealing cover is arranged and can be closed to seal the air duct 120, thereby ensuring the waterproof performance of the electronic device 100.

In other embodiments, wherein the sealing cap is connected to the control unit 140, the control unit 140 is used to control the opening and closing of the sealing cap. The sealing cover needs to be opened when it is necessary to sense the ambient temperature, so in the present embodiment, the sealing cover is opened by the control unit 140 because the control unit 140 also controls the air circulation device 130 and the temperature sensor 110 at the same time. When it is necessary to detect the temperature, the control unit 140 opens the sealing cover, opens the air-circulation device 130, and then the temperature sensor detects the temperature.

The sealing cover may also be a removable cover, which may be installed when the electronic device 100 may be in a water environment, and removed when not in use, which may be flexibly adjusted according to the actual application.

The sealing cover can also be a push-pull cover, and the push-pull can realize the closing or opening of the air inlet 121 and/or the air outlet 122; or a filling type plug, and the air inlet 121 and/or the air outlet 122 can be sealed without water.

In other embodiments, a dust-laying net may be disposed at the air inlet 121 and/or the air outlet 122. When the electronic device 100 is used, the electronic device 100 may be in any environment, and a dust-proof technology of the electronic device 100 is also important, and in order to ensure clean environment inside the air duct 120, prevent dust from entering the electronic device 100 through the air duct 120, and also prevent the dust from affecting the temperature sensor 110, dust-proof nets are disposed at the air inlet 121 and the air outlet 122.

The dust screen can be made of non-woven fabrics, sponge, nylon mesh, plastics, metal dust screen and the like, and the size and the property of the air duct 120 of the electronic device 100 can be improved, so that a proper material is selected to serve as the dust screen. While the dust screen may be removable to facilitate cleaning of the dust screen and cleaning of the air duct 120.

In other embodiments, as shown in fig. 3, 4, and 5, the electronic device 100 may further include: the mounting rack 150, the mounting rack 150 is arranged in the air duct 120; the temperature sensor 110 is mounted on the mounting frame 150, and the temperature sensor 110 and the inner wall of the air duct 120 are spaced apart.

The mounting bracket 150 is used for mounting the temperature sensor 110, and the temperature sensor 110 is fixed inside the air duct 120 through the mounting bracket 150, so that the temperature sensor 110 is not in direct contact with the air duct 120, and the influence of the heat of the electronic device 100 on the detection result of the temperature sensor 110 is further reduced. The mounting bracket 150 may be installed in a plurality of ways, and may be connected vertically, as shown in fig. 3, the mounting bracket 150 is divided into two parts, which are respectively and fixedly connected to the inner wall of the air duct 120, so as to fix the temperature sensor 110 in the air duct 120, and to position the temperature sensor 110 at the middle position of the air duct 120, so that the temperature sensor 110 is installed more firmly. Or may be installed on one side, as shown in fig. 4 and 5, one end of the mounting bracket 150 is fixedly connected to the inner wall of the air duct 120, and the other end is used for fixing the temperature sensor 110. The connection can reduce the contact area between the temperature sensor 110 and the mounting frame 150, and avoid the temperature transmitted by the mounting frame 150 from interfering with the detection result of the ambient temperature.

In other embodiments, as shown in fig. 3, 4, and 5, the mounting frame 150 is made of a heat insulating material; alternatively, mounting bracket 150 includes an insulating layer. Because the electronic device 100 generates heat during use, the heat is conducted to the temperature sensor 110 through the inside of the electronic product, and then the detection result is affected, and the mounting frame 150 made of the heat insulation material can reduce the heat of the electronic device 100 from being transferred to the temperature sensor 110 through the mounting frame 150. Or the mounting 150 has insulation, for example the mounting 150 is flat with insulation in it, or the mounting 150 is rod-shaped with a section in it. The heat insulation layer is made of heat insulation materials. By reducing thermal conduction, the impact of the electronic device 100 on the temperature sensor 110 is reduced.

The mounting bracket 150 may be made of a heat insulating material, or a heat insulating layer may be installed at a connection portion of the mounting bracket 150 and the temperature sensor 110, or the mounting bracket 150 may be made of a heat insulating material and the heat insulating layer may be used at the same time, so that double heat insulation is provided, and the influence of heat generated by the electronic device on the temperature sensor 110 is further reduced. The heat insulating material may be fiberglass, asbestos, rock wool, silicate, aerogel blanket, vacuum panel, or the like.

In some embodiments, a heat-sensitive sensor and a fan are arranged in the air duct of the electronic equipment, and the control unit is respectively in communication connection with the heat-sensitive sensor and the fan. The heat-sensitive sensor and the fan are arranged inside the air channel, the heat-sensitive sensor is arranged between the fan and the air inlet of the air channel, and the heat-sensitive sensor is close to the air inlet of the air channel. When the environmental temperature of the electronic equipment needs to be detected, the control unit controls the fan and the heat-sensitive sensor to be started. The fan rotates, so that original air in the air channel is discharged, air in the environment enters the air channel, the temperature is detected by the thermosensitive sensor, the control unit obtains the detection result of the thermosensitive sensor, and the control unit displays the detected temperature value, so that the reading is convenient. Meanwhile, the control unit can have a sending function and can send the received temperature value to a user side or a management side of the electronic equipment so as to adjust the electronic equipment according to the temperature condition. The fan is provided with a wind regulator for regulating the wind speed of the fan, and the control unit can control the wind regulator to regulate the wind speed of the fan. Because the air in the air duct can be discharged after the fan is started for a period of time, the air discharging time in the air duct can be shortened by accelerating the wind speed, and the temperature detection of the heat-sensitive sensor is accelerated.

It is understood that the electronic device provided by the embodiments of the present disclosure includes a hardware structure and/or a software module for performing the above functions. The disclosed embodiments can be implemented in hardware or a combination of hardware and computer software, in combination with the exemplary elements and algorithm steps disclosed in the disclosed embodiments. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

It is understood that "a plurality" in this disclosure means two or more, and other words are analogous. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. The singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms "first," "second," and the like are used to describe various information and that such information should not be limited by these terms. These terms are only used to distinguish one type of information from another and do not denote a particular order or importance. Indeed, the terms "first," "second," and the like are fully interchangeable. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure.

It will be further understood that the terms "central," "longitudinal," "lateral," "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the present embodiment and to simplify the description, but do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation.

It will be further understood that, unless otherwise specified, "connected" includes direct connections between the two without the presence of other elements, as well as indirect connections between the two with the presence of other elements.

It is further to be understood that while operations are depicted in the drawings in a particular order, this is not to be understood as requiring that such operations be performed in the particular order shown or in serial order, or that all illustrated operations be performed, to achieve desirable results. In certain environments, multitasking and parallel processing may be advantageous.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (9)

1. An electronic device, characterized in that the electronic device comprises:

the air duct comprises an air inlet and an air outlet;

the temperature sensor is arranged in the air duct and used for detecting the ambient temperature;

and the air outlet is close to the chip.

2. The electronic device of claim 1,

the electronic device further includes:

and the air circulation device is used for enabling air outside the air channel to enter the air channel from the air inlet and to be discharged out of the air channel from the air outlet.

3. The electronic device of claim 2, wherein the air circulating device is disposed between the temperature sensor and the air outlet of the air duct.

4. An electronic device according to claim 3, characterized in that the air circulating means are provided with wind power adjusting means.

5. The electronic device of claim 2, further comprising:

the control unit is in communication connection with the temperature sensor and is used for acquiring the ambient temperature detected by the temperature sensor; and the control unit is in communication connection with the air circulation device and is used for controlling the air circulation device.

6. The electronic device of claim 5, wherein a sealing cover is disposed at the air inlet and/or the air outlet.

7. The electronic device of claim 6, wherein the sealing cover is connected to the control unit, and the control unit is configured to control opening and closing of the sealing cover.

8. The electronic device of claim 1, wherein a dust-discharging net is disposed at the air inlet and/or the air outlet.

9. The electronic device of any of claims 1-8, further comprising:

the mounting rack is arranged in the air duct;

the temperature sensor is installed in the mounting bracket, just the temperature sensor with the inner wall interval in wind channel sets up.

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