Smart gas valve

Abstract

The embodiment of the present application proposes a smart gas valve, which is a radiator arranged on a circuit board, and the radiator includes a first radiating part, a second radiating part, a first connecting part and a second connecting part. The first radiating part includes a first straight part and a bent part, the bent part is connected to one end of the straight part and is bent relative to the first straight part, the connecting part includes a first connecting part and a second connecting part, the first connecting part is connected to the second connecting part and is bent relative to the second connecting part, the end of the first connecting part away from the second connecting part is connected to the bent part, the end of the second connecting part away from the first connecting part is connected to the second radiating part, the second radiating part is provided with a feeding point, and the first radiating part is provided with a feeding source point. The smart gas valve proposed in the present application can achieve omnidirectional radiation while reducing the size of the antenna radiator, and has a higher radiation gain and better radiation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of gas valves, and in particular to an intelligent gas valve. Background Art

[0002] At present, as people's living standards gradually improve, the requirements for water, electricity, gas, refrigeration, heating and other conditions in the living environment are getting higher and higher. Smart meters transform traditional manual mechanical meters into remote meter reading through the Internet of Things, bringing convenience to energy management departments.

[0003] In the prior art, the smart gas valve is a metering device that integrates wireless transmission, flow calculation, data collection, and remote control, and uses the Internet of Things or other dedicated networks to upload gas usage data to a cloud server. However, the antenna structure design in this device is relatively complex, the size is large, and the radiation efficiency is low. Summary of the invention

[0004] The present application proposes an intelligent gas valve to improve the above-mentioned problems.

[0005] The present application proposes an intelligent gas valve, comprising: a shell, a controller, a circuit board, and a signal line, a radiator arranged on the circuit board, and a housing cavity is arranged in the shell; the controller comprises a feeding power source; the circuit board is arranged in the housing cavity; the radiator comprises a first radiating portion, a second radiating portion, a first connecting portion and a second connecting portion, the first radiating portion comprises a first straight portion and a bent portion, the bent portion is connected to one end of the straight portion and is bent relative to the first straight portion, the connecting portion comprises a first connecting portion and a second connecting portion, the first connecting portion is connected to the second connecting portion and is bent relative to the second connecting portion, an end of the first connecting portion away from the second connecting portion is connected to the bent portion, an end of the second connecting portion away from the first connecting portion is connected to the second radiating portion, a feeding point is arranged on the second radiating portion, a feeding source point is arranged on the first radiating portion, and the signal line connects the feeding power source and the feeding source point.

[0006] In some embodiments, the extending direction of the bending portion is parallel to the extending direction of the second connecting portion.

[0007] In some embodiments, the feed source point is disposed at an end of the first radiating portion away from the bending portion, and the feed point is disposed at an end of the second radiating portion away from the second connecting portion.

[0008] In some embodiments, the radiator further includes a first branch, the first branch is connected to the bending portion, and an extension direction of the first branch is colinear with an extension direction of the first connecting portion.

[0009] In some embodiments, the radiator further includes a second branch connected to an end of the second radiating portion away from the second connecting portion, and an end of the first branch away from the bending portion is flush with an end of the second branch away from the second radiating portion.

[0010] In some embodiments, the length of the circuit board is 25.13-27.13 mm, and the width of the circuit board is 8.59-10.59 mm.

[0011] In some embodiments, the signal line includes a first core layer and a second core layer, the first core layer is connected to a feed source point, and the second core layer is connected to a feed point point.

[0012] In some embodiments, the second core layer is sleeved outside the first core layer.

[0013] In some embodiments, the signal line further includes a first insulating layer and a second insulating layer, the first insulating layer is disposed between the first core layer and the second core layer and covers the first core layer, the second core layer covers the first insulating layer, and the second insulating layer covers the second core layer.

[0014] In some embodiments, the radiator is a ZigBee radiator.

[0015] The embodiment of the present application proposes a smart gas valve, which is a radiator arranged on a circuit board, and the radiator includes a first radiating part, a second radiating part, a first connecting part and a second connecting part. The first radiating part includes a first straight part and a bent part, the bent part is connected to one end of the straight part and is bent relative to the first straight part, the connecting part includes a first connecting part and a second connecting part, the first connecting part is connected to the second connecting part and is bent relative to the second connecting part, the end of the first connecting part away from the second connecting part is connected to the bent part, the end of the second connecting part away from the first connecting part is connected to the second radiating part, the second radiating part is provided with a feeding point, and the first radiating part is provided with a feeding source point. The smart gas valve proposed in the present application can achieve omnidirectional radiation while reducing the size of the antenna radiator, and has a higher radiation gain and better radiation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the implementation modes of the present application, the drawings required for use in the description of the implementation modes will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A structural block diagram of an intelligent gas valve proposed in an embodiment of the present application;

[0018] Figure 2 This is a structural block diagram of a ZigBee module in an intelligent gas valve proposed in an embodiment of the present application;

[0019] Figure 3 A partial structural schematic diagram of an intelligent gas valve proposed in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of a portion of the structure of a signal line in an intelligent gas valve proposed in an embodiment of the present application;

[0021] Figure 5 This is the plane radiation pattern of the intelligent gas valve of this embodiment at a frequency of 2400 MHz;

[0022] Figure 6 This is the plane radiation pattern of the intelligent gas valve of this embodiment at a frequency of 2450MHz;

[0023] Figure 7 This is the plane radiation pattern of the intelligent gas valve of this embodiment at a frequency of 2500 MHz. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the implementation mode of the present application. Obviously, the described implementation mode is only a part of the implementation mode of the present application, not all the implementation modes. Based on the implementation mode in the present application, all other implementation modes obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0025] In this application, unless otherwise clearly specified or limited, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or it can be only surface contact, or surface contact connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] In addition, the terms "first", "second", etc. are only used to distinguish descriptions and cannot be understood as specific or special structures. The descriptions of the terms "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0027] ZigBee is a low-power LAN protocol based on the IEEE802.15.4 standard. It has the characteristics of low power consumption, low cost, low complexity, strong anti-interference ability, large network capacity, etc. It can support a variety of network topologies such as mesh networks, star networks, and tree networks. ZigBee uses three different operating frequency bands, namely 2.4GHz, 868MHz, and 433MHz, of which 2.4GHz is the mainstream operating frequency band of ZigBee. In the 2.4GHz frequency band, the radiation distance of PIFA antennas or monopole antennas is relatively short, which is difficult to meet the unlimited distance transmission requirements of the ZigBee module 121 for antennas in practical applications.

[0028] See also Figure 1 The present application proposes an intelligent gas valve 1 , including a controller 10 , a circuit board 11 , a radiator 14 disposed on the circuit board 11 , and a signal line 13 .

[0029] The controller 10 is arranged inside the shell and is used for communication connection with external electronic devices, such as mobile phones or servers. As an embodiment, the controller 10 may also include a ZigBee module 121, and the radiator 14 is a ZigBee radiator. The radiator 14 can be arranged on the circuit board 11. Since electromagnetic waves are easily interfered, in order to achieve a better communication effect, as an embodiment, the radiator 14 can be arranged on the clearance area of ​​the circuit board 11, and no other metal parts are arranged in the clearance area to improve the radiation efficiency of the antenna. In other embodiments, the radiator 14 can also be other radiators 14, such as a WIFI radiator 14, etc. The type of the radiator 14 is selected according to the communication type adapted to the smart gas valve 1, and is not specifically limited here.

[0030] For details, please refer to Figure 2 The ZigBee module 121 may also include a radio frequency circuit 1211 and a control circuit 1212. The radio frequency circuit 1211 has a feed power source, and the feed power source can be connected to the radiator 14 through the feed point 100. The radio frequency circuit 1211 may be a high-frequency circuit for generating radio frequency signals. The control circuit 1212 is connected to the radio frequency circuit 1211, and is used to control the radio frequency circuit 1211 to generate radio frequency signals. The control circuit 1212 and the radio frequency circuit 1211 may be integrated on the circuit board 11, or may be arranged in other ways, which are not limited here. In this embodiment, the length L1 of the circuit board 11 may be 25.13 to 27.13 mm, and the width L2 of the circuit board 11 may be 8.59 to 10.59 mm, so as to obtain a sufficient size to set the radiator 14.

[0031] See also Figure 3The radiator 14 includes a first radiating portion 141, a second radiating portion 142, a first connecting portion 143 and a second connecting portion 144. The first radiating portion 141 includes a first straight portion 1411 and a bent portion 1412. The bent portion 1412 is connected to one end of the straight portion and is bent relative to the first straight portion 1411. The first connecting portion 143 is connected to the second connecting portion 144 and is bent relative to the second connecting portion 144. An end of the first connecting portion 143 away from the second connecting portion 144 is connected to the bent portion 1412, and an end of the second connecting portion 144 away from the first connecting portion 143 is connected to the second radiating portion 142. The second radiating portion 142 is provided with a feeding point 200, and the first radiating portion 141 is provided with a feeding source point. Through such a design, a loop is formed between the feeding source point 100 and the feeding point 200 through the first radiating portion 141, the second radiating portion 142, the first connecting portion 143 and the second connecting portion 1443 to ensure that the signal can be radiated.

[0032] As a more preferred embodiment, the extending direction of the bending portion 1412 is parallel to the extending direction of the second connecting portion 144. With such a design, the bending portion 1412 and the second connecting portion 144 are not likely to interfere with each other when generating radiation.

[0033] In some embodiments, in order to increase the radiation efficiency of the radiator as much as possible, the feed point is set at one end of the first radiating portion 141 away from the bending portion 1412, and the feed point is set at one end of the second radiating portion 142 away from the second connecting portion 144. Through such a design, the length of the loop can be guaranteed to the greatest extent under a certain shape, so that the intensity of the radiation signal is higher.

[0034] In some cases, the radiator 14 needs to be extended to meet the tuning of the radiator 14. Specifically, as an embodiment, the radiator 14 further includes a first branch 145, the first branch 145 is connected to the bending portion 1412, and the extension direction of the first branch 145 is colinear with the extension direction of the first connecting portion 143. As a more preferred embodiment, the radiator 14 further includes a second branch 146, the second branch 146 is connected to an end of the second radiating portion 142 away from the second connecting portion 144, and an end of the first branch 145 away from the bending portion 1412 is flush with an end of the second branch 146 away from the second radiating portion 142. The tuning of the radiator 14 can be met by the first branch 145 and the second branch 146.

[0035] One end of the signal line 13 is electrically connected to the feed source, and the other end is electrically connected to the feed point 100 and the feed point 200. Since the metal of the signal line 13 itself also has certain capacitance and inductance in the high-frequency circuit, the length and location of the signal line 13 will also affect the radiation efficiency of the radiator 14. The shape and structure of the radiator 14 and the feed line are adjusted according to the center frequency, bandwidth and gain required by the radiator 14, so as to obtain a wiring method with the best performance of the radiator 14.

[0036] See also Figure 4 As an implementation, the signal line 13 may include a first core layer 131 and a second core layer 132 that are electrically insulated from each other, the first core layer 131 is connected to the feed point 100 and the feed source, and the second core layer 132 is connected to the feed point 200. The first core layer 131 is used as a feed line, and a copper core wire may be selected to reduce the resistance of the first core layer 131 itself. If the first core layer 131 and the second core layer 132 are arranged side by side, inductance may be generated, so as an implementation, the signal line 13 may use a coaxial line. The influence between signals of different core layers in the coaxial line is small.

[0037] In some embodiments, the signal line 13 further includes a first insulating layer 133 and a second insulating layer 134, wherein the first insulating layer 133 is disposed between the first core layer 131 and the second core layer 132 and covers the first core layer 131, and the second insulating layer 134 covers the outside of the second core layer 132. The first insulating layer 133 and the second insulating layer 134 can further avoid the influence between the first core layer 131 and the second core layer 132.

[0038] In the actual test, a network analyzer is used for testing. Please refer to Table 1, which shows the frequency and standing wave ratio value of the radiator 14 at multiple measuring points in the intelligent gas valve 1 of the above embodiment obtained by the network analyzer test;

[0039] Frequency(MHZ) 2400 2500 Standing Wave 1.46 1.23

[0040] Please refer to Table 2. According to the intelligent gas valve 1 of the above embodiment, the gains and efficiencies corresponding to different frequencies in actual tests are shown in Table 2;

[0041]

[0042] From the data in Table 2, it can be seen that in the frequency band of 2400 to 2500 GHz, the gain is between 2.dB and 2.66dB, and the radiation efficiency is between 64.61% and 68.18%. Therefore, the radiation efficiency of the intelligent gas valve 1 of the embodiment of the present application when transmitting and receiving in the 2.4 GHz frequency band is higher than 60%, and its radiation efficiency is significantly higher.

[0043] See also Figure 5 , Figure 5 Points A, B, and C show the plane radiation pattern of the intelligent gas valve 1 of this embodiment at a frequency of 2400MHz. The center point of the circle represents the position of the antenna. The farther from the center point, the greater the gain of the antenna. Among them, point A is the E1 plane radiation pattern, point B is the E2 plane radiation pattern, and point C is the H plane radiation pattern. The E plane is the plane where the maximum radiation direction and the electric field are located. The E1 and E2 planes are perpendicular to each other, that is, the plane where the radiator 14 is located. The H plane is the plane where the magnetic field and the maximum radiation direction are located, that is, the plane perpendicular to the radiator 14. At a frequency of 2400MHz, it can be found that the radiation patterns shown in points A, B, and C are all relatively close to circles, and the gain is relatively high.

[0044] See also Figure 6 , Figure 6 Points A, B, and C in the figure show the plane radiation pattern of the intelligent gas valve 1 of this embodiment at a frequency of 2450MHz. The center point of the circle represents the position of the antenna. The farther from the center point, the greater the gain of the antenna. Among them, point A is the E1 plane radiation pattern, point B is the E2 plane radiation pattern, and point C is the H plane radiation pattern. The E plane is the plane where the maximum radiation direction and the electric field are located, that is, the plane where the intelligent gas valve 1 is located, and the H plane is the plane where the magnetic field and the maximum radiation direction are located, that is, the plane perpendicular to the radiator 14. At a frequency of 2450MHz, it can be found that the radiation patterns shown in points A, B, and C in the figure are all close to circles and have higher gains.

[0045] See also Figure 7 , Figure 7 Points A, B, and C in the figure show the plane radiation pattern of the intelligent gas valve 1 of this embodiment at a frequency of 2500MHz. The center point of the circle represents the position of the antenna. The farther from the center point, the greater the gain of the antenna. Figure 7 Point A is the radiation pattern of the E1 surface. Figure 7 Point B is the radiation pattern of the E2 surface. Figure 7 Point C is the H-plane radiation pattern, the E-plane is the plane with the maximum radiation direction and the electric field, that is, the plane where the intelligent gas valve 1 is located, and the H-plane is the plane with the magnetic field and the maximum radiation direction, that is, the plane perpendicular to the radiator 14. At a frequency of 2500MHz, it can be found that Figure 7 The radiation patterns shown at A, B, and C are all close to circles and have higher gains.

[0046] In summary, the intelligent gas valve 1 and the radiator 14 of this embodiment both have a radiation pattern that is approximately omnidirectional, and can basically achieve omnidirectional radiation.

[0047] The use principle of the intelligent gas valve 1 proposed in this application is as follows:

[0048] The embodiment of the present application proposes a smart gas valve, which is a radiator arranged on a circuit board. The radiator includes a first radiating portion 141, a second radiating portion 142, a first connecting portion 143 and a second connecting portion 144. The first radiating portion 141 includes a first straight portion 1411 and a bent portion 1412. The bent portion 1412 is connected to one end of the straight portion and is bent relative to the first straight portion 1411. The connecting portion includes a first connecting portion 143 and a second connecting portion 144. The first connecting portion 143 is connected to the second connecting portion 144 and is bent relative to the second connecting portion 144. One end of the first connecting portion 143 away from the second connecting portion 144 is connected to the bent portion 1412. One end of the second connecting portion 144 away from the first connecting portion 143 is connected to the second radiating portion 142. The second radiating portion 142 is provided with a feeding point, and the first radiating portion 141 is provided with a feeding source point. The smart gas valve proposed in the present application can achieve omnidirectional radiation while reducing the size of the antenna radiator, and has a higher radiation gain and better radiation efficiency.

[0049] The above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present application, and should all be included in the protection scope of the present application.

[0050] The above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person skilled in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some of the technical features can be replaced by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various implementation modes of the present application, and should all be included in the protection scope of the present application.

Claims

1. An intelligent gas valve, characterized in that: include: A housing having a receiving cavity disposed therein; A controller, the controller comprising a power supply; A circuit board, wherein the circuit board is arranged in the accommodating cavity; A radiator disposed on the circuit board, the radiator comprising a first radiating portion, a second radiating portion, a first connecting portion, a second connecting portion and a first branch, the first radiating portion comprising a first straight portion and a bent portion, the bent portion being connected to one end of the straight portion and bent relative to the first straight portion, the first connecting portion being connected to the second connecting portion and bent relative to the second connecting portion, an end of the first connecting portion away from the second connecting portion being connected to the bent portion, an end of the second connecting portion away from the first connecting portion being connected to the second radiating portion, a feeding point being provided on the second radiating portion, a feeding source point being provided on the first radiating portion, the first branch being connected to the bent portion, and an extending direction of the first branch being collinear with an extending direction of the first connecting portion; as well as A signal line is connected to the feeding source and the feeding point.

2. The intelligent gas valve according to claim 1, characterized in that: An extending direction of the bending portion is parallel to an extending direction of the second connecting portion.

3. The intelligent gas valve according to claim 1, characterized in that: The feed source point is arranged at an end of the first radiating portion away from the bending portion, and the feed point is arranged at an end of the second radiating portion away from the second connecting portion.

4. The intelligent gas valve according to claim 1, characterized in that: The radiator further includes a second branch connected to an end of the second radiating portion away from the second connecting portion, and an end of the first branch away from the bending portion is flush with an end of the second branch away from the second radiating portion.

5. The intelligent gas valve according to any one of claims 1 to 4, characterized in that: The length of the circuit board is 25.13-27.13 mm, and the width of the circuit board is 8.59-10.59 mm.

6. The intelligent gas valve according to claim 1, characterized in that: The signal line includes a first core layer and a second core layer, the first core layer is connected to the feed source point, and the second core layer is connected to the feed point point.

7. The intelligent gas valve according to claim 6, characterized in that: The second core layer is sleeved outside the first core layer.

8. The intelligent gas valve according to claim 6, characterized in that: The signal line further includes a first insulating layer and a second insulating layer, the first insulating layer is disposed between the first core layer and the second core layer and covers the first core layer, the second core layer covers the first insulating layer, and the second insulating layer covers the second core layer.

9. The intelligent gas valve according to claim 1, characterized in that: The radiator is a ZigBee radiator.

Images