CN216048407U - Wind speed measuring mechanism, fan and water heater - Google Patents

Abstract

The application relates to a wind speed measuring mechanism, a fan and a water heater. The wind speed measuring mechanism includes: a mounting seat; the flexible mounting plate is arranged on the mounting seat and is configured to deform in response to the airflow pressure of the environment where the flexible mounting plate is located; and the strain sensing element is arranged on the flexible mounting plate. The overall structure that strain sensing element and flexible mounting panel constitute is more stable, is difficult for rocking, guarantees better the stability of the wind pressure data that utilizes strain sensing element to record, and strain sensing element is difficult for taking place deformation to interference factors such as the resistance of airing exhaust of the environment that strain sensing element is located, gets rid of interference factors such as the resistance of airing exhaust of the environment that strain sensing element is located to strain sensing element's influence.

Description

Wind speed measuring mechanism, fan and water heater

Technical Field

The application relates to the technical field of fans, in particular to a wind speed measuring mechanism, a fan and a water heater.

Background

The flue blockage detection scheme is a detection scheme for enabling the gas water heater to be in a normal working condition. In the prior art, the specific process of the flue blockage detection scheme is as follows: the pressure sensor or the pressure switch is arranged at the air duct of the fan, the pressure sensor or the pressure switch acquires air pressure data in the air duct to detect the resistance at the air outlet of the fan of the gas water heater, and then the state of the fan is controlled according to the measured air pressure data, for example, when the measured air pressure data is greater than a preset value, the gas water heater is in a shutdown state, the gas water heater can be protected, and safety accidents such as standard exceeding of smoke or flame overflow are avoided.

However, in the use process of the flue blockage detection scheme, one is to indirectly detect the air volume by detecting the static pressure near the outlet of the fan, and the other is to indirectly detect the air volume by detecting the change of the rotating speed of the fan, the former is easy to generate detection errors when the air speed is small, and the latter is easy to generate undersize rotating speed change when the rotating speed of the fan is low, so that the detection is not accurate, and both the situations of false detection or inaccurate detection can be generated.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a wind speed measuring mechanism, a fan and a water heater to solve the problem of inaccurate detection when the air flow speed is low or the fan speed is low in the existing solutions.

According to an aspect of the present application, there is provided a wind speed measurement mechanism comprising:

a mounting seat;

the flexible mounting plate is arranged on the mounting seat and is configured to deform in response to the airflow pressure of the environment where the flexible mounting plate is located; and

and the strain sensing element is arranged on the flexible mounting plate.

In one embodiment, the flexible mounting plate has a fixed end connected to the mounting base, and a free end opposite to the fixed end;

the free end is configured to be capable of swinging relative to the fixed end under the action of an air flow.

In one embodiment, the length direction of the flexible mounting plate is perpendicular to the first side surface of the mounting seat.

In one embodiment, the flexible mounting plate has a windward side facing the airflow and a leeward side opposite to the windward side;

the strain sensing element is arranged on at least one of the windward side and the leeward side.

In one embodiment, the number of the strain sensing elements is at least two, and at least two strain sensing elements are arranged on at least one of the leeward side and the windward side at intervals.

In one embodiment, the windward side and the leeward side are parallel to each other.

In one embodiment, at least one strain sensing element is disposed on each of the windward side and the leeward side.

In one embodiment, the temperature compensation device further comprises a temperature compensation element, wherein the temperature compensation element is arranged on the mounting seat;

the temperature compensation element and the strain sensing element are located in the same working space, and the temperature compensation element is located at a position where deformation is not prone to occurring.

According to another aspect of the application, a fan is provided, including the wind channel, still include:

a motor;

in the wind speed measuring mechanism, the mounting base is arranged on the fan, and the flexible mounting plate is positioned in the air duct; and

a controller connected with the motor and the strain sensing element.

According to another aspect of the application, a water heater is further provided, and the water heater comprises the fan and the wind speed measuring mechanism.

Above-mentioned wind speed measurement mechanism, fan and water heater, when there is air current or wind speed to change in the wind channel, the flexible mounting panel can take place deformation, and strain sensing element takes place deformation thereupon, and strain sensing element's resistance also can change, can measure the produced strain of flexible mounting panel atress deformation with the help of strain sensing element to according to the strain that detects and obtain the wind pressure data of the environment that the flexible mounting panel is located. In addition, the strain sensing element is arranged on the flexible mounting plate and deforms in response to the deformation of the flexible mounting plate, so that the overall structure formed by the strain sensing element and the flexible mounting plate is more stable and is not easy to shake, the stability of wind pressure data measured by the strain sensing element is better ensured, the strain sensing element is not easy to deform due to interference factors such as air exhaust resistance of the environment where the strain sensing element is located, and the influence of the interference factors such as air exhaust resistance of the environment where the strain sensing element is located on the strain sensing element is eliminated.

Drawings

FIG. 1 illustrates a schematic structural diagram of a wind turbine in an embodiment of the present application;

FIG. 2 illustrates an exploded view of a blower in one embodiment of the present application;

FIG. 3 shows a schematic structural view of a wind speed measuring mechanism in a first embodiment of the present application;

FIG. 4 shows a schematic structural view of a wind speed measuring mechanism in a second embodiment of the present application;

FIG. 5 is a schematic view showing the structure of a wind speed measuring mechanism according to a third embodiment of the present application;

FIG. 6 is a schematic structural diagram of a wind speed measuring mechanism in a fourth embodiment of the present application;

FIG. 7 shows a schematic structural diagram of a wind speed measuring mechanism in a fifth embodiment of the present application;

FIG. 8 shows a schematic structural view of a wind speed measuring mechanism in a sixth embodiment of the present application;

fig. 9 shows a schematic structural view of the clamping member in an embodiment of the present application.

In the figure, 100, a fan; 110. an air duct; 120. a motor; 130. a housing; 131. mounting a through hole; 200. a wind speed measuring mechanism; 210. a strain sensitive element; 2101. a cable; 211. a temperature compensation element; 220. a mounting seat; 221. a first side surface; 230. a flexible mounting plate; 231. the windward side; 232. a leeward side; 240. a clamping member; 2401. a screw hole; 2402. a cable via; 250. and (7) fixing the plate.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Fig. 1 and fig. 2 respectively show a structural schematic diagram and an explosion schematic diagram of a fan in an embodiment of the present application.

Referring to fig. 1 and 2, the blower 100 includes an air duct 110 and a motor 120, and air in the air duct 110 flows along the air duct 110 under the driving of the motor 120.

Fig. 3 shows a schematic structural diagram of a wind speed measuring mechanism in an embodiment of the present application.

Referring to fig. 3, an embodiment of a wind speed measuring mechanism 200 includes a mounting base 220, a flexible mounting plate 230 disposed on the mounting base 220, and a strain sensing element 210 disposed on the flexible mounting plate 230. Wherein the flexible mounting plate 230 is configured to deform in response to the pressure of the airflow in the environment in which it is located. When the environment of the flexible mounting plate 230 has air flow or changes in wind speed, the flexible mounting plate 230 can deform, the strain sensing element 210 deforms accordingly, the resistance of the strain sensing element 210 changes, the strain generated by the deformation of the flexible mounting plate 230 due to stress can be measured by means of the strain sensing element 210, and wind pressure data of the environment of the flexible mounting plate 230 can be obtained according to the detected strain. In addition, the strain sensing element 210 is disposed on the flexible mounting plate 230, so that the overall structure formed by the strain sensing element 210 and the flexible mounting plate 230 is more stable and less prone to shake, and the stability of the wind pressure data measured by the strain sensing element 210 is better ensured, the strain sensing element 210 is less prone to deform due to interference factors such as the air discharge resistance of the environment where the strain sensing element 210 is located, and the influence of the interference factors such as the air discharge resistance of the environment where the strain sensing element 210 is located on the strain sensing element 210 is eliminated, that is, the wind pressure data measured by the strain sensing element 210 is not changed due to the air discharge resistance change of the environment where the strain sensing element 210 is located, and only responds to the change of the wind speed in the wind duct 110.

It should be noted that, the wind pressure data is acquired according to the strain data, and the principle of the existing strain gauge can be referred to: the controller of the existing strain gauge obtains strain data of a strain gauge of the strain gauge, and then obtains wind pressure data in an air duct.

In some embodiments, referring again to fig. 1, mounting base 220 of wind speed measurement mechanism 200 is disposed on wind turbine 100 such that flexible mounting plate 230 is located within wind tunnel 110, and flexible mounting plate 230 is configured to deform in response to the pressure of the airflow within wind tunnel 110. When there is air flow or wind speed change in the wind tunnel 110, the flexible mounting plate 230 can deform, and the strain sensing element 210 deforms accordingly, so that wind pressure data in the wind tunnel 110 can be measured by means of the strain sensing element 210. The fan 100 further includes a controller, the controller is connected to the motor 120 and the strain sensing element 210, and the controller is configured to control an operating state of the motor 120 according to the wind pressure data in the wind channel 110 measured by the strain sensing element 210, for example, when the measured wind pressure data is smaller than a preset value, the controller is configured to turn off the motor 120, so as to protect the fan 100.

In other embodiments, when the wind speed measuring mechanism 200 is applied to the fan 100 of the water heater, the air exhausting rate of the fan 100 can be adjusted according to the operation condition of the water heater, for example, the air exhausting rate of the fan 100 can be adjusted according to the fire power of the burner of the water heater, so that the air exhausting rate of the fan 100 can be changed according to the fire power of the burner, and the air exhausting rate of the fan 100 and the fire power of the burner can be stably maintained within an appropriate range without being influenced by the air exhausting resistance of the environment, thereby ensuring the water heater to stably and reliably operate.

Further, referring to fig. 3 again, the flexible mounting plate 230 has a fixed end connected to the mounting base 220, and a free end opposite to the fixed end, the free end being configured to swing relative to the fixed end under the action of the air flow. When the environment of the flexible mounting plate 230 has air flow or wind speed changes, the free end of the flexible mounting plate 230 can be displaced relative to the mounting end of the flexible mounting plate 230 to deform the flexible mounting plate 230, so that the flexible mounting plate 230 can be deformed well in response to the pressure of the fluid in the air duct 110.

In some embodiments, the flexible mounting plate 230 is disposed at an angle with respect to the central axis of the wind tunnel 110, so that when there is air flow or wind speed variation in the wind tunnel 110, the free end of the flexible mounting plate 230 can be displaced with respect to the mounting end of the flexible mounting plate 230, and the free end can be displaced to a first position, wherein the first position is a position in the wind tunnel 110 and spaced from the fixed end in the central axis direction of the wind tunnel 110, so that the flexible mounting plate 230 can be deformed in response to the fluid pressure in the wind tunnel 110.

In other embodiments, both ends of the flexible mounting plate 230 are fixed in the air duct 110, and the middle region between the two ends of the flexible mounting plate 230 can deform in response to the pressure of the air flow in the air duct 110, so that the strain sensitive element 210 deforms accordingly.

Further, the flexible mounting plate 230 is perpendicular to the central axis of the air duct 110, and the surface of the flexible mounting plate 230 faces the fluid in the air duct 110, so that the flexible mounting plate 230 can deform in response to the fluid pressure in the air duct 110, and even when the wind speed is low, the flexible mounting plate 230 can transmit deformation, so that the strain sensing element 210 deforms, and the wind pressure data in the air duct 110 is obtained. In addition, the wind speed of the position of the flexible mounting plate 230 is judged according to the deformation of the flexible mounting plate 230 caused by the pressure intensity perpendicular to the wind direction, so that wind pressure data can be obtained more conveniently according to the detected strain data.

Further, referring to fig. 3 again, the length direction of the flexible mounting plate 230 is perpendicular to the first side 221 of the mounting base 220, and specifically, the fixed end of the flexible mounting plate 230 is perpendicularly connected to the first side 221 of the mounting base 220, so that the free end of the flexible mounting plate 230 can swing relative to the fixed end thereof under the action of the airflow due to the mounting of the mounting base 220. When the mounting base 220 is installed, the first side 221 of the mounting base 220 is parallel to the airflow direction of the environment where the flexible mounting plate 230 is located, for example, the first side 221 of the mounting base 220 is made to be the central axis of the air duct 110, so that the free end can swing relative to the fixed end under the action of the airflow. Further, referring to fig. 3 again, the flexible mounting plate 230 has a windward side 231 facing the airflow and a leeward side 232 opposite to the windward side 231. The strain sensitive element 210 is disposed on at least one of the windward side 231 and the leeward side 232. The strain sensitive element 210 may be made to deform in good response to deformation of the flexible mounting plate 230.

In the embodiment illustrated in FIG. 3, the strain sensitive element 210 is a resistive strain gage. The strain sensing element 210 is parallel to the windward side 231 or the leeward side 232 of the flexible mounting plate 230, so that the strain sensing element 210 can well respond to the deformation of the flexible mounting plate 230 to deform, the flexible mounting plate 230 deforms under the action of the air flow pressure in the air duct 110, and the strain sensing element 210 deforms along with the flexible mounting plate 230, so that the measured air pressure data is more accurate. Further, the windward side 231 and the leeward side 232 are parallel to each other. If the same number of strain sensing elements 210 are respectively arranged on the windward side 231 and the leeward side 232, the strain sensing elements 210 on the windward side 231 and the strain sensing elements 210 on the leeward side 232 are respectively subjected to a pulling pressure and a pressing stress under the action of air flow, and the pulling pressure and the pressing stress are two stresses with equal magnitude and opposite directions, so that strain errors caused by factors such as temperature can be eliminated by means of the pressing stress and the pulling pressure.

Further, the wind speed measuring mechanism 200 further includes a wheatstone bridge electrically connected to the controller, and the strain sensing element 210 is one of the legs of the wheatstone bridge. The resistance can be accurately measured using a wheatstone bridge, so that the strain data of the strain sensing element 210 and the wind pressure data in the wind tunnel 110 can be accurately obtained. Wherein, the Wheatstone bridge is a half bridge circuit or a full bridge circuit.

Optionally, the strain sensing element 210 is a self-compensating strain gauge, since the resistance of the strain sensing element 210 changes when the temperature of the environment in which the strain sensing element 210 is located changes, which may affect the accuracy of the strain data, and the sensitive grid of the self-compensating strain gauge is composed of two metal wires made of different materials, and the temperature coefficients of the two metal wires made of different materials are different or even just opposite, so that the resistance change of the strain sensing element 210 caused by the temperature change may be reduced or even eliminated, and the self-compensating effect on the temperature change may be achieved within a certain temperature change range by adjusting the length ratio of the two metal wires in the sensitive grid. When the self-compensating strain gauge is adopted, the measurement can be completed by adopting a single-arm bridge circuit, and strain data and wind pressure data in the air duct 110 can be obtained more simply and conveniently.

Further, the number of the strain sensing elements 210 is at least two, and at least two strain sensing elements 210 are arranged on at least one of the leeward side 232 and the windward side 231 at intervals, and the strain data measured by at least two strain sensing elements 210 can be averaged, so that the accuracy of the obtained wind pressure data in the air duct 110 is higher.

Optionally, at least two strain sensing elements 210 are spaced apart from each other along the direction from the fixed end to the free end. The at least two strain sensitive elements 210 are each better able to deform in response to deformation of the flexible mounting plate 230.

In some embodiments, at least two strain sensitive elements 210 may also be spaced apart on the leeward side 232 of the flexible mounting plate 230. Specifically, referring to fig. 4, the number of the strain sensing elements 210 is two, and the two strain sensing elements 210 are disposed at intervals along the direction from the fixed end to the free end.

In other embodiments, at least two strain sensing elements 210 may also be disposed at intervals on the windward side 231 of the flexible mounting plate 230, specifically, two strain sensing elements 210 are disposed at intervals on the windward side 231 of the flexible mounting plate 230, the wheatstone bridge is a half-bridge circuit, and two strain sensing elements 210 are electrically connected to two adjacent bridge arms of the half-bridge circuit respectively, so as to avoid an error caused by temperature, improve the sensitivity of detection, and further improve the accuracy of the detected strain data and the wind pressure data in the wind tunnel 110.

In other embodiments, the number of the strain sensing elements 210 is four, and correspondingly, the wheatstone bridge is a full bridge circuit, and the four strain sensing elements 210 are electrically connected to four bridge arms of the full bridge circuit respectively, so that the detection sensitivity is higher.

Further, referring to fig. 5 and 6 again, at least one strain sensing element 210 is disposed on each of the windward side 231 and the leeward side 232. In the embodiment shown in fig. 1, 5 and 6, the windward side 231 is a side facing the airflow in the air duct 110. When there is air flow or wind speed change in the wind channel 110, the strain sensing element 210 on the windward side 231 and the strain sensing element 210 on the leeward side 232 are respectively subjected to tension and compression stresses, and the tension and compression stresses are two stresses with equal magnitude and opposite directions, which can improve the measurement accuracy: the strain data measured by the strain sensitive element 210 on the windward side 231 includes temperature induced strain and positive strain induced by air flow in the air duct 110; the strain data measured by the strain sensitive element 210 on the leeward side 232 includes temperature induced strain and negative strain induced by air flow in the air duct 110; the potential of the circuit where the strain sensing element 210 is located on the windward side 231 is subtracted from the potential of the circuit where the strain sensing element 210 is located on the leeward side 232, so that the strain error caused by temperature can be eliminated, and the average value of strain data caused by air flow in the air duct 110 can be obtained, so that the accuracy of the obtained air pressure data in the air duct 110 is higher.

Further, referring to fig. 5 again, a strain sensing element 210 is disposed on the windward side 231 and the leeward side 232, respectively. The wheatstone bridge is a half-bridge circuit, and the two strain sensing elements 210 are electrically connected to two adjacent bridge arms of the half-bridge circuit respectively. Compared with a single-arm bridge circuit, the output voltage of the half-bridge circuit is doubled, non-linear errors do not exist, errors caused by temperature can be avoided, the detection sensitivity is higher, and the accuracy of strain data obtained by detection and wind pressure data in the air duct 110 is further improved.

Further, referring to fig. 6 again, two strain sensing elements 210 are disposed on the windward side 231 and the leeward side 232, respectively. The wheatstone bridge is a full bridge circuit, four strain sensing elements 210 are respectively electrically connected to four bridge arms of the full bridge circuit, two adjacent bridge arms of the full bridge circuit are respectively provided with the strain sensing element 210 on the windward side 231 and the strain sensing element 210 on the leeward side 232, two opposite bridge arms of the full bridge circuit are respectively provided with the two strain sensing elements 210 on the windward side 231 or the two strain sensing elements 210 on the leeward side 232, and the two strain sensing elements 210 on the windward side 231. Compared with a single-arm bridge circuit, the output voltage of the full-bridge circuit is improved by four times, non-linear errors do not exist, errors caused by temperature can be avoided, the detection sensitivity is higher, and the accuracy of detected strain data and wind pressure data in the wind channel 110 is higher.

Further, referring to fig. 7 and 8, the wind speed measuring mechanism 200 further includes a temperature compensation element 211, and the temperature compensation element 211 is disposed on the mounting base 220. When the environment where the flexible mounting plate 230 is located has air flow or wind speed changes, the temperature compensation element 211 does not deform, and the temperature compensation element 211 can be used to eliminate strain errors caused by factors such as temperature and the like, so that the detection precision is improved.

In particular, as shown in the embodiments of FIGS. 1, 7 and 8, the temperature compensation element 211 is located within the air chute 110 and parallel to the central axis of the air chute 110. The temperature compensation element 211 and the strain sensing element 210 have the same structure and size. The strain data measured by the strain sensing element 210 arranged at an angle with the central axis of the air duct 110 includes strain caused by temperature and strain caused by air flow in the air duct 110, the temperature compensation element 211 parallel to the central axis of the air duct 110 is not deformed by air flow, and the strain data measured by the temperature compensation element 211 parallel to the air duct 110 includes strain caused by temperature, so that the strain data detected by the strain sensing element 210 and the strain data detected by the temperature compensation element 211 are subtracted from each other, thereby eliminating strain errors caused by factors such as temperature and the like, and effectively improving the accuracy of the detected strain data and the wind pressure data in the air duct 110. Specifically, the mounting base 220 has a first side 221 for mounting the strain sensing element 210, and the temperature compensation element 211 and the flexible mounting plate 230 are both disposed on the first side 221 of the mounting base 220, so that the strain caused by the temperature of the temperature compensation element 211 and the strain caused by the strain sensing element 210 are substantially the same, which is more favorable for improving the detection accuracy.

In some embodiments, referring to fig. 8 again, the mounting base 220 is provided with a fixing plate 250, and the temperature compensation element 211 is disposed on the fixing plate 250, so that the temperature compensation element 211 can be used to eliminate strain errors caused by temperature and other factors, thereby improving the detection accuracy.

In other embodiments, the temperature compensation element 211 may also be disposed on the flexible mounting board 230, and the temperature compensation element 211 and the strain sensing element 210 are electrically connected to adjacent arms of the bridge circuit, respectively, so as to eliminate strain errors caused by temperature and other factors.

Specifically, the fixing plate 250 and the flexible mounting plate 230 are both disposed on the first side 221 of the mounting base 220, so that the temperature compensation element 211 and the strain sensing element 210 have substantially the same strain caused by temperature, which is more favorable for improving the detection accuracy.

Further, referring to fig. 1 again, the mounting base 220 is disposed at the air outlet of the fan 100, so as to detect the wind pressure data at the air outlet of the fan 100 by using the strain sensing element 210, and further perform stable detection and control on the wind speed when the air exhaust resistance changes.

Further, referring to fig. 1 and 2 again, the mounting base 220 is detachably disposed on the blower 100, so as to dispose the strain sensing element 210 at a desired position according to the requirement.

Specifically, wind speed measurement mechanism 200 also includes a mounting assembly by which mount 220 is removably disposed on wind turbine 100. Referring to fig. 2 again in combination with fig. 9, the mounting assembly includes a screw and a clamping member 240 for clamping the mounting base 220, the clamping member 240 is provided with a screw hole 2401 matching with the screw, the housing 130 of the blower 100 is provided with a mounting through hole 131 for the flexible mounting plate 230 to pass through, so that the flexible mounting plate 230 passes through the mounting through hole 131, the mounting base 220 abuts against the housing 130 of the blower 100, the mounting base 220 is clamped by the clamping member 240 and abuts against the housing 130 of the blower 100, and then the screw is screwed into the screw hole 2401 of the clamping member 240 and passes through the screw hole 2401 and abuts against the housing 130 of the blower 100, so that the mounting base 220 can be detachably arranged on the blower 100 by means of the mounting assembly.

Further, a cable through hole 2402 for passing the cable 2101 is formed on the clamping member 240, so that the cable 2101 on the strain sensitive element 210 can be electrically connected with the controller through the cable through hole 2402.

An embodiment of the present application provides a water heater, including above-mentioned fan 100, still include above-mentioned wind speed measurement mechanism 200.

Further, the water heater further includes a burner, and the fan 100 may be installed in an upstream direction or a downstream direction of the burner, and when the fan 100 is installed in the downstream direction of the burner, the flow velocity of the flue gas may be detected by using the wind velocity measuring mechanism 200. When fan 100 is installed in the upstream direction of the burner, the flow rate of air entering the burner can be detected using wind speed measuring mechanism 200. The fan 100 can be installed in the upstream or downstream direction of the burner as desired.

Compared with the modes of pressure measurement and rotating speed measurement, the wind speed measuring mechanism 200 is simple and reasonable in structure, free of moving parts, not prone to damage, high in response speed and accuracy, and greatly reduced in fault rate and misoperation probability; the flexible mounting plate 230 where the strain sensitive element 210 is located is not affected by the air exhaust resistance of the environment where the flexible mounting plate 230 is located, and only changes according to the air speed in the air duct 110, so that even under the condition that the air exhaust resistance of the environment where the flexible mounting plate 230 is located is large (under the condition that the air exhaust resistance in the air duct 110 is large, the air exhaust resistance in the air duct 110 is also large), the air speed at the current position can be accurately measured by the air speed measuring mechanism 200; the defect that the motor of the direct current fan cannot make effective response under the low-speed and low-power conditions is overcome (the motor of the direct current fan has low wind speed under the low-speed and low-power conditions, at the moment, the rotation speed change caused by blockage of a smoke exhaust pipe is small, the data change amount is small easily, the situation of inaccurate detection is caused, and then the fan is closed in advance or no response is caused to the wind speed change).

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A wind speed measuring mechanism, characterized in that the wind speed measuring mechanism (200) comprises:

a mounting base (220);

a flexible mounting plate (230) disposed on the mounting base (220), the flexible mounting plate (230) being configured to deform in response to an airflow pressure of an environment in which the flexible mounting plate is disposed; and

a strain sensitive element (210) disposed on the flexible mounting plate (230).

2. Wind speed measuring mechanism according to claim 1, wherein the flexible mounting plate (230) has a fixed end connected to the mounting base (220), and a free end opposite to the fixed end;

the free end is configured to be capable of swinging relative to the fixed end under the action of an air flow.

3. Wind speed measuring mechanism according to claim 2, characterized in that the length direction of the flexible mounting plate (230) is perpendicular to the first side (221) of the mounting seat (220).

4. A wind speed measuring mechanism according to any of claims 1-3, wherein the flexible mounting plate (230) has a windward side (231) facing the air flow, and a leeward side (232) opposite the windward side (231);

the strain sensitive element (210) is disposed on at least one of the windward side (231) and the leeward side (232).

5. The wind speed measuring mechanism according to claim 4, wherein the number of said strain sensitive elements (210) is at least two, and at least two of said strain sensitive elements (210) are arranged at intervals on at least one of said leeward side (232) and said windward side (231).

6. Wind speed measuring mechanism according to claim 4, characterized in that said windward side (231) and said leeward side (232) are parallel to each other.

7. Wind speed measuring mechanism according to claim 6, wherein at least one strain sensitive element (210) is provided on each of said windward side (231) and said leeward side (232).

8. The wind speed measurement mechanism according to claim 1, further comprising a temperature compensation element (211), said temperature compensation element (211) being provided to said mounting base (220);

the temperature compensation element (211) and the strain sensing element (210) are located in the same working space, and the temperature compensation element (211) is located at a position where deformation is not prone to occurring.

9. A fan (100) comprising an air duct (110), further comprising:

a motor (120);

a wind speed measuring mechanism (200) according to any of claims 1 to 8, said mounting (220) being arranged to said wind turbine (100), said flexible mounting plate (230) being located within said wind tunnel (110); and

a controller connected with the motor (120) and the strain sensitive element (210).

10. A water heater comprising a fan (100) according to claim 9, and further comprising a wind speed measuring mechanism (200) according to any of claims 1-8.

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