A transducer type water flow sensor

Abstract

A transducer type water flow sensor, comprising a main body, transducers, a reflection member, a temperature sensor and a top cover plate, the main body comprises a circular tube main body, two transducer installation cavities and a sensor installation seat, the reflection member comprises a seat plate, a sound transmission hole arranged on the seat plate and reflection plates arranged in the sound transmission hole at both ends, the transducers and the temperature sensor are respectively arranged in the transducer installation cavities and the sensor installation seat and are sealed, the temperature sensor extends into the circular tube main body, the top cover plate covers the transducer installation cavities and is fixed, the temperature sensor is located in the sensor hole, data lines of the transducers extend out of the transducer line holes, the reflection member is arranged in the circular tube main body, the transducers correspond to the reflection plates, one transducer transmits signals while receiving signals of another transducer. Through electroacoustic conversion and acoustoelectric conversion of the transducers, transmission of the reflection plates, accurate measurement of water flow is realized.

Description

Technical Field

[0001] This utility model relates to a water flow sensor for an electric water heater. Background Technology

[0002] The existing technology, Chinese patent 201821617994.1, describes a visual and precise external water flow sensor. This water flow sensor includes an inlet pipe and an outlet pipe connected to a water flow sensor cavity. The water flow sensor cavity contains a rotor that senses water flow, and the rotor has a magnet mounting ring with a magnet installed. The magnet transmits the water flow signal to a Hall sensor. A transparent mounting cover is connected to the water flow sensor cavity, and the outer side of the cover has a recessed hole for installing the Hall sensor, filled with transparent colloid. An LED light is connected to the Hall sensor circuit. The problem is that the accuracy of water flow calculation is low. Utility Model Content

[0003] The purpose of this invention is to provide a transducer-type water flow sensor that measures water flow through the transmission and reception of a heat exchanger with high accuracy.

[0004] This invention is implemented as follows: a transducer-type water flow sensor, characterized in that it includes a main body, a transducer, a reflector, a temperature sensor, and a top cover plate.

[0005] The main body includes a cylindrical body, two transducer mounting cavities, and a sensor mounting base. The sensor mounting base is located on the cylindrical body between the transducer mounting cavities and is connected to the cylindrical body.

[0006] The top cover plate has two transducer hole and a sensor hole;

[0007] The reflector includes a base plate, a sound transmission hole on the base plate, and reflective plates disposed at both ends of the sound transmission hole;

[0008] The transducer and temperature sensor are respectively housed in the transducer mounting cavity and the sensor mounting base and are sealed. The temperature sensor extends into the cylindrical body. The top cover plate covers and fixes the transducer mounting cavity. The temperature sensor is located in the sensing hole, and the transducer's data line extends out from the transducer line hole. The reflector is located in the cylindrical body, and the transducer corresponds to the reflector. One transducer transmits a signal while receiving the signal from the other transducer.

[0009] The transducer-type water flow sensor is characterized in that the reflector is arranged in an inverted trapezoidal shape.

[0010] The transducer-type water flow sensor is characterized in that the transmitting plate and the receiving plate are elliptical, and the two ends of the short axis are connected to the side wall plates at both ends of the sound transmission hole.

[0011] The transducer-type water flow sensor is characterized in that the temperature sensor has an annular base.

[0012] The base plate of the sensor mounting base is provided with a through hole;

[0013] It also includes bolts, which have axial holes and countersunk holes;

[0014] The temperature sensor extends through the through hole into the cylindrical body, and the bolt engages with the internal thread of the sensor mounting base, with the annular seat extending into the countersunk hole.

[0015] The transducer-type water flow sensor is characterized in that the transducer is provided with a head.

[0016] The transducer mounting cavity is connected to the cylindrical body through a head hole, and the head is inserted into the head hole.

[0017] The transducer-type water flow sensor is characterized in that it further includes a rectification and stabilization device, which includes a circular tubular water channel and an axial protrusion surrounding the circular tubular water channel; the circular tubular water channel is provided with a sensor hole.

[0018] The rectifier and flow stabilizer is located inside the cylindrical body, with the axial protrusion fitting against the inner wall of the cylindrical body. The cylindrical body and the cylindrical water channel between two adjacent axial protrusions form a sub-water channel. The reflector passes through the cylindrical water channel. The emitting plate and the receiving plate are opposite to the cylindrical water channel. The temperature sensor extends into the cylindrical water channel through the sensor hole.

[0019] The transducer-type water flow sensor is characterized in that the rectifying and stabilizing device comprises an upper body and a lower body.

[0020] The upper body includes an upper semi-circular tubular water channel, the axial protrusion at the top, the sensor hole, and upper semi-axial protrusions at both ends;

[0021] The lower half includes a lower semi-circular tubular water channel, the axial protrusion at the bottom, and lower semi-axial protrusions at both ends;

[0022] The upper and lower halves are respectively located on the upper and lower surfaces of the base plate of the reflector, and the upper axial protrusion and the lower axial protrusion are respectively attached to the base plate.

[0023] The transducer-type water flow sensor is characterized in that: a number of heat-conducting seats and a fixed seat at the bottom are provided on one side of the cylindrical body of the main body, and the heat-conducting seats are provided with screw holes.

[0024] It also includes the main control board of the electric water heater, which is equipped with a silicon controlled rectifier (SCR) and has connection holes.

[0025] The thyristor is attached to the heat-conducting base, and the screw passes through the connection hole to fix it to the heat-conducting base. The screw passes through the connection hole on the main control board and is screwed into the mounting base.

[0026] This utility model discloses a transducer-type water flow sensor, which achieves accurate measurement of water flow rate through electro-acoustic conversion and acoustic-electric conversion of the transducer and transmission via a reflector. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the present invention.

[0028] Figure 2 yes Figure 1 One of the A-A views.

[0029] Figure 3 yes Figure 1 The second B-B view.

[0030] Figure 4 This is a perspective view of the present invention.

[0031] Figure 5 This is one of the exploded perspective views of this utility model.

[0032] Figure 6 This is the second exploded perspective view of this utility model.

[0033] Figure 7 This is the third exploded perspective view of this utility model. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] like Figure 1 As shown, a transducer-type water flow sensor includes a main body 1, two transducers 2, a reflector 4, a temperature sensor 5, and a top cover plate 3.

[0037] The main body 1 includes a cylindrical body 11, two heat exchange mounting cavities 12 and a sensor mounting base 13. The sensor mounting base 13 is disposed on the cylindrical body 11 between the heat exchange mounting cavities 12 and is connected to the cylindrical body 11.

[0038] Transducer 2 is a piezoelectric converter, and it has the characteristics of converting electricity to sound and sound to electricity.

[0039] The top cover plate 3 is provided with two transducer holes 31 and a sensing hole 32, with the sensing hole 32 located between the two transducer holes 31.

[0040] The reflector 4 includes a base plate 41, a sound transmission hole 42 disposed on the base plate, and a reflector plate 43 disposed at both ends of the sound transmission hole 42.

[0041] The transducer 2 and temperature sensor 5 are respectively housed and sealed within the transducer mounting cavity 12 and the sensor mounting base 13. The temperature sensor 5 extends into the cylindrical body 11. The top cover 3 covers and fixes the transducer mounting cavity 12. One end of the temperature sensor 5 is located inside the sensing hole 32, and the transducer's data cable extends from the transducer cable hole 31. The reflector 4 is housed within the cylindrical body 11, and the transducer 2 corresponds to the reflector 43. Figure 1 As shown, among the two transducers 2, transducer 2 has both transmitting and receiving functions.

[0042] like Figure 1 As shown, the two transmitter plates 43 are arranged in an inverted trapezoidal shape.

[0043] As a further improvement of this invention: the reflector 43 is elliptical, and its short axis ends are connected to the sidewalls at both ends of the sound transmission hole 42. This shape reduces eddy current generation and lowers noise.

[0044] As a further improvement of this utility model: the temperature sensor 5 is provided with an annular seat 51;

[0045] The bottom plate of the sensor mounting base 13 is provided with a through hole 131;

[0046] It also includes bolt 7, which has an axial hole 71 and a countersunk hole 72;

[0047] Temperature sensor 5 extends into the cylindrical body 11 through the through hole 131. Bolt 7 is screwed into the internal thread of sensor mounting base 13. The annular seat 51 extends into the countersunk hole. The head of bolt 7 is located in the sensor hole 62.

[0048] As a further improvement of this invention, the transducer 2 is provided with a head 21;

[0049] The transducer mounting cavity 12 is connected to the cylindrical body 11 through the head hole 121, and the head 21 is inserted into the head hole 121.

[0050] As a further improvement of this utility model, it also includes a rectifier and flow stabilizer 8, which includes a circular tubular water channel 81 and four axial protrusions 82 arranged around the circular tubular water channel 81; the circular tubular water channel 81 is provided with a sensor hole 83, and the sensor hole 811 passes through an axial protrusion 82.

[0051] The rectifier and flow stabilizer 8 is located inside the cylindrical body 11, with the axial protrusion 82 fitting against the inner wall of the cylindrical body 11. The cylindrical body 11 and the cylindrical water channel 81 between two adjacent axial protrusions 82 form a sub-water channel 84. The reflector 4 passes through the cylindrical water channel 81. The emitting plate 43 and the receiving plate 44 are opposite to the cylindrical water channel 81. The temperature sensor 5 extends into the cylindrical water channel 81 through the sensor hole 83.

[0052] This utility model can also be implemented in the following way: (e.g.) Figure 3 As shown, the rectifier and current stabilizer 8 includes an upper body 8A and a lower body 8B.

[0053] The upper body 8A includes an upper semi-circular tubular water channel 811, the axial protrusion 82 located at the top, the sensor hole 83, and axial protrusions 82 located at both ends;

[0054] The lower half 8B includes a lower semi-circular tubular water channel 812, the axial protrusion at the bottom, and the axial protrusions 82 at both ends;

[0055] The upper half 8A and the lower half 8B are respectively provided on the upper and lower surfaces of the base plate 41 of the reflector 4. The axial protrusions 82 at both ends of the upper semi-circular tubular water channel 811 and the axial protrusions at both ends of the lower semi-circular tubular water channel 812 are respectively attached to the base plate 41.

[0056] This utility model can also be implemented as follows: the upper half 8A is composed of two identical halves, and each half is provided with a half-sensor hole; the lower half 8B is composed of two identical halves; as shown Figure 6 , Figure 7 As shown,

[0057] As a further improvement of this utility model: a plurality of heat-conducting seats 15 and a fixing seat 16 at the bottom are provided on one side of the cylindrical body 11 of the main body, and screw holes are provided on the heat-conducting seats.

[0058] It also includes the main control board 9 of the electric water heater, the main control board 9 is equipped with a silicon controlled rectifier 91, and the silicon controlled rectifier 91 is equipped with a connection hole;

[0059] The thyristor 91 is attached to the heat-conducting base 15. The screw passes through the connection hole to fix the thyristor 91 to the heat-conducting base 15. The screw passes through the connection hole on the main control board and is screwed into the fixing base 16.

[0060] When using this utility model, such as Figure 1 , Figure 4 As shown, transducer 2 is powered on, and water enters through the cylindrical body 11. Reflector 4 is located in the water inside the cylindrical body 11. The sound waves from transducer 2 at the inlet end are reflected by reflector plate 43 at the inlet end and move to the left along the axis of the cylindrical body 11 with the water flow. Reflector plate 43 at the outlet end reflects the sound waves back to transducer 2 at the outlet end. At the same time, the signal emitted by the heat exchange energy at the outlet end is reflected by reflector plate 43 at the outlet end and moves to the right in the water. It is then reflected by reflector plate 43 at the inlet end and received by the heat exchanger at the inlet end. The main control board then processes the signal and calculates the water flow rate.

[0061] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A transducer-type water flow sensor, characterized in that: Includes the main body, transducer, reflector, temperature sensor, and top cover. The main body includes a cylindrical body, two transducer mounting cavities, and a sensor mounting base. The sensor mounting base is located on the cylindrical body between the transducer mounting cavities and is connected to the cylindrical body. The top cover plate has two transducer hole and a sensor hole; The reflector includes a base plate, a sound transmission hole on the base plate, and reflective plates disposed at both ends of the sound transmission hole; The transducer and temperature sensor are respectively housed in the transducer mounting cavity and the sensor mounting base and are sealed. The temperature sensor extends into the cylindrical body. The top cover plate covers and fixes the transducer mounting cavity. The temperature sensor is located in the sensing hole, and the transducer's data line extends out from the transducer line hole. The reflector is located in the cylindrical body, and the transducer corresponds to the reflector. One transducer transmits a signal while receiving the signal from the other transducer.

2. The transducer-type water flow sensor according to claim 1, characterized in that: The reflectors at both ends of the sound transmission hole are arranged in an inverted trapezoidal shape.

3. A transducer-type water flow sensor according to claim 2, characterized in that: The reflectors inside the two ends of the sound transmission hole are elliptical, and the two ends of the short axis are connected to the side wall plates at both ends of the sound transmission hole.

4. A transducer-type water flow sensor according to claim 1, characterized in that: The temperature sensor is provided with an annular base; The base plate of the sensor mounting base is provided with a through hole; It also includes bolts, which have axial holes and countersunk holes; The temperature sensor extends through the through hole into the cylindrical body, and the bolt engages with the internal thread of the sensor mounting base, with the annular seat extending into the countersunk hole.

5. A transducer-type water flow sensor according to claim 1, characterized in that: The transducer is equipped with a head; The transducer mounting cavity is connected to the cylindrical body through a head hole, and the head is inserted into the head hole.

6. A transducer-type water flow sensor according to claim 1, 2, 3, 4 or 5, characterized in that: It also includes a rectifier and flow stabilizer, which includes a circular tubular water channel and an axial protrusion surrounding the circular tubular water channel; the circular tubular water channel is provided with a sensor hole; The rectifier and flow stabilizer is located inside the cylindrical body, with the axial protrusion fitting against the inner wall of the cylindrical body. The cylindrical body and the cylindrical water channel between two adjacent axial protrusions form a sub-water channel. The reflector passes through the cylindrical water channel. The reflector plates at both ends of the sound transmission hole are opposite to the cylindrical water channel. The temperature sensor extends into the cylindrical water channel through the sensor hole.

7. A transducer-type water flow sensor according to claim 6, characterized in that: The rectifier and current stabilizer includes an upper body and a lower body. The upper body includes an upper semi-circular tubular water channel, the axial protrusion at the top, the sensor hole, and semi-axial protrusions at both ends. The lower half includes a lower semi-circular tubular water channel, the axial protrusion at the bottom, and the axial protrusions at both ends; The upper and lower halves are respectively located on the upper and lower surfaces of the base plate of the reflector, and the axial protrusions are respectively attached to the base plate.

8. A transducer-type water flow sensor according to claim 6, characterized in that: The main body has several heat-conducting seats on one side and a fixing seat at the bottom. The heat-conducting seats have screw holes. It also includes the main control board of the electric water heater, which is equipped with a silicon controlled rectifier (SCR) and has connection holes. The thyristor is attached to the heat-conducting base, and screws are passed through the connection holes to fix the thyristor to the heat-conducting base. Screws are also passed through the connection holes on the main control board and screwed into the mounting base.

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