CN219271874U - Heating temperature measurement switching circuit, breathing machine pipeline and breathing machine - Google Patents
Heating temperature measurement switching circuit, breathing machine pipeline and breathing machine Download PDFInfo
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- CN219271874U CN219271874U CN202223395633.6U CN202223395633U CN219271874U CN 219271874 U CN219271874 U CN 219271874U CN 202223395633 U CN202223395633 U CN 202223395633U CN 219271874 U CN219271874 U CN 219271874U
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Abstract
The application provides a heating temperature measurement switching circuit, include: the two wires comprise a first end and a second end, and the first ends of the two wires are used for being connected with an external power supply; the temperature measuring module is connected between the second ends of the two wires, forms a loop with an external power supply, and comprises a temperature measuring diode and a thermistor which are connected in series; and at least one heating module, each heating module is connected between two wires, each heating module and an external power supply form a loop, each heating module comprises heating diodes and heating loads which are connected in series, the current conduction directions of all the heating diodes are the same, and the current conduction directions of all the heating diodes are opposite to the current conduction directions of the temperature measuring diodes. In addition, the application also provides a ventilator circuit and a ventilator. The application provides a heating temperature measurement switching circuit can realize that two spool way possesses the function of heating and temperature acquisition.
Description
Technical Field
The application relates to the technical field of respirators, in particular to a heating and temperature measuring switching circuit, a respirator pipeline and a respirator.
Background
In the pipeline heating of the existing breathing machine equipment, the pipeline heating device comprises a 3-pipeline heating scheme, a temperature acquisition scheme, a 4-pipeline heating scheme, a temperature acquisition scheme and the like. However, 3-wire pipeline heating and temperature acquisition require 3 wires wound around the pipeline, increasing costs. After the pipeline is wound with 3 wires, the flexibility of the pipeline is reduced, and the hardness of the pipeline is increased. Correspondingly, 4 wires need to be wound on the pipeline for 4-wire pipeline heating and temperature acquisition, so that the pipeline softness is further reduced and the pipeline hardness is harder while the cost is increased.
Disclosure of Invention
In view of the above, it is necessary to provide a heating and temperature measuring switching circuit, a ventilator circuit and a ventilator, which can realize that the two-wire circuit has the functions of heating and temperature collection.
In a first aspect, an embodiment of the present application provides a heating and temperature measurement switching circuit, including:
the two wires comprise a first end and a second end, and the first ends of the two wires are used for being connected with an external power supply;
the temperature measuring module is connected between the second ends of the two wires, the temperature measuring module and the external power supply form a loop, and the temperature measuring module comprises a temperature measuring diode and a thermistor which are connected in series; and
each heating module is connected between the two wires, each heating module and the external power supply form a loop, each heating module comprises a heating diode and a heating load which are connected in series, the current conduction directions of all the heating diodes are the same, and the current conduction directions of all the heating diodes are opposite to the current conduction directions of the temperature measuring diodes.
Preferably, the heating and temperature measuring switching circuit comprises a heating mode and a temperature measuring mode, and when the temperature measuring diodes are conducted and are all cut off, the heating and temperature measuring switching circuit is in the temperature measuring mode; when the temperature measuring diode is cut off and the heating diode is all conducted, the heating temperature measuring switching circuit is in a heating mode.
Preferably, the current of the external power supply may selectively flow from the first end of any one of the two wires, so that the heating and temperature measuring switching circuit is in the heating mode or the temperature measuring mode.
Preferably, the temperature measuring module further comprises a conversion module connected with the thermistor, and the conversion module is used for measuring the voltage of the thermistor to obtain a temperature value.
Preferably, the heating and temperature measuring switching circuit further comprises a control module connected between the first ends of the two wires, and the control module is used for controlling the power supply to flow in from the first end of any one wire of the two wires according to the temperature value.
In a second aspect, embodiments of the present application provide a ventilator circuit, the ventilator circuit comprising:
a tube body; and
the heating and temperature measuring switching circuit is arranged on the pipe body.
Preferably, the two wires of the heating and temperature measuring switching circuit are wound on the pipe body.
In a third aspect, embodiments of the present application provide a ventilator comprising a main unit, a respiratory mask, and a ventilator circuit as described above, the ventilator circuit being connected between the main unit and the respiratory mask.
Preferably, the host is provided with a power supply, and the heating and temperature measuring switching circuit of the ventilator pipeline is electrically connected with the power supply.
Preferably, the pipe body of the ventilator circuit comprises a machine end and a mask end, wherein the machine end is connected with the host machine, and the mask end is connected with the breathing mask; the temperature measuring module of the heating temperature measuring switching circuit is arranged at the end of the face mask, and the first ends of the two wires of the heating temperature measuring switching circuit are arranged at the end of the machine.
The heating and temperature measuring switching circuit, the breathing machine pipeline and the breathing machine are based on the two-wire heating pipeline of the diode, and the heating function and the temperature measuring function are realized mainly through the current direction of the control circuit. The heating and temperature measurement switching circuit controls the current direction of the circuit by multiplexing the two heated wires and the unidirectional conductivity of the diode, and can realize different functions of heating and temperature measurement of the heating and temperature measurement switching circuit by changing the current direction.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained from the structures shown in these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a functional module architecture diagram of a heating and temperature measuring switching circuit provided in an embodiment of the present application.
Fig. 2 is a schematic diagram of a temperature measuring module and a heating module of the heating temperature measuring switching circuit shown in fig. 1.
Fig. 3 is a schematic diagram of a ventilator circuit according to an embodiment of the present disclosure.
Fig. 4 is a schematic diagram of a ventilator according to an embodiment of the present application.
The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.
Detailed Description
In the description of the present application, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
For a clearer and more accurate understanding of the present application, reference will now be made to the detailed description taken in conjunction with the accompanying drawings. The accompanying drawings, in which like reference numerals refer to like elements, illustrate examples of embodiments of the present application. It is to be understood that the proportions shown in the drawings are not to scale as actually practiced in the present application, and are for illustrative purposes only and are not drawn to scale.
Referring to fig. 1 and fig. 2 in combination, fig. 1 is a functional module architecture diagram of a heating and temperature measuring switching circuit provided in an embodiment of the present application, and fig. 2 is a schematic diagram of a temperature measuring module and a heating module of the heating and temperature measuring switching circuit provided in an embodiment of the present application. The heating and temperature measuring switching circuit 10 is applied to a respirator product. During the use of the breathing apparatus, a user needs to wear a breathing mask, and the worn breathing mask is usually connected with the breathing apparatus through a heating pipeline. In order to prevent water vapor in the oxygen flow of the breathing machine from being condensed into water drops when passing through the heating pipeline, the damage to a user is caused, a temperature acquisition function is generally arranged at the tail end of the heating pipeline, and the damage to the user caused by overhigh temperature of the oxygen flow due to pipeline heating is avoided through acquisition and judgment of temperature change.
In the present embodiment, the heating and temperature measuring switching circuit 10 is disposed in the heating pipeline. The heating and temperature measuring switching circuit 10 comprises two wires 11, a temperature measuring module 12 and at least one heating module 13. Taking the schematic diagram shown in fig. 2 as an example, the heating and temperature measuring switching circuit 10 includes four heating modules 13. The number of the heating modules 13 may be set according to actual heating requirements, and is not limited herein.
Both wires 11 comprise a first end 111 and a second end 112, the first ends 111 of both wires 11 being adapted to be connected to an external power source 20.
The temperature measuring module 12 is connected between the second ends 112 of the two wires 11, and the temperature measuring module 12 and the external power source 20 form a loop, i.e. a first loop. In this embodiment, the temperature measuring module 12 includes a temperature measuring diode 121 and a thermistor 122 connected in series. Among them, the thermistor 122 includes, but is not limited to, a negative temperature coefficient thermistor (NTC) and a positive temperature coefficient thermistor (PTC). When a current passes through the thermistor 122, the resistance of the thermistor 122 changes with temperature, resulting in a change in the voltage of the current in the first loop.
Each heating module 13 is connected between two wires 11, and each heating module 13 and the external power source 20 form a loop, i.e. a second loop. In the present embodiment, each heating module 13 includes a heating diode 131 and a heating load 132 connected in series. Wherein the current conducting direction of all heating diodes 131 is the same. The heating load 132 is an electrical heating element including, but not limited to, an electrical heating wire, an electrical hot plate, an electrical heating coil, an electrical heating rod, an electrical heating core, a mica heat plate, a ceramic heat plate, an electrical heating wire, and the like.
In the present embodiment, the current conduction direction of all the heating diodes 131 is opposite to the current conduction direction of the temperature measuring diode 121. That is, when the heating diode 131 is turned on, the temperature measuring diode 121 is turned off; when the heating diode 131 is turned off, the temperature measuring diode 121 is turned on.
The heating and temperature measuring switching circuit 10 includes a heating mode and a temperature measuring mode. When the temperature measuring diode 121 is turned on and the heating diode 131 is turned off, the heating temperature measuring switching circuit 10 is in a temperature measuring mode. When the temperature measuring diode 121 is turned off and the heating diode 131 is turned on, the heating temperature measuring switching circuit 10 is in the heating mode.
The current of the external power source 20 may selectively flow from the first end 111 of any one of the two wires 11, so that the heating and temperature measuring switching circuit 10 is in the heating mode or the temperature measuring mode. That is, current may selectively flow from the first end 111 of one wire 11 and out from the first end 111 of the other wire 11.
In the present embodiment, the two wires 11 include a wire a and a wire B. When current flows from the first end 111 of the wire a, all the heating diodes 131 are turned on, and all the heating loads 132 have current passing through; when the temperature measuring diode 121 is turned off, no current flows through the thermistor 122, and the heating temperature measuring switching circuit 10 is in the heating mode. That is, the current flows only through the second loop, i.e. the current flows in from the first end 111 of the wire a, shunts to each heating module 13, passes through the heating diode 131 and the heating load 132 of each heating module 13, and merges into the first end 111 of the wire B to flow out. When current flows from the first end 111 of the wire B, all heating diodes 131 are cut off, and all heating loads 132 do not pass current; when the temperature measuring diode 121 is turned on, the thermistor 122 is supplied with current, and the heating and temperature measuring switching circuit 10 is in a temperature measuring mode. That is, the current flows only through the first loop, i.e., the current flows from the first end 111 of the wire B, sequentially through the thermistor 122 and the temperature measuring diode 121, and then flows out from the first end 111 of the wire a.
The temperature-measuring diode 121 is turned off when the heating temperature-measuring switching circuit 10 is in the heating mode, and the influence of the thermistor 122 on the power consumption when the heating temperature-measuring switching circuit 10 is heated can be reduced. Meanwhile, when the heating and temperature measuring switching circuit 10 is in the temperature measuring mode, no current passes through the heating load 132, so that the measuring precision of the thermistor 122 is effectively improved.
The heating temperature measurement switching circuit 10 is provided with a plurality of heating modules 13, so that the heating diode 131 can drive higher current, and a plurality of branch circuits can realize different degrees of shunt, thereby improving the safety of the circuit. Meanwhile, the heating diodes 131 also reduce the heating value of the temperature measuring diode 121, and improve the accuracy of the thermistor 122 in measuring temperature.
The thermometry module 12 also includes a conversion module 123. The conversion module 123 is connected to the thermistor 122 and is used for measuring the voltage of the thermistor 122 to obtain a temperature value. The conversion module 123 may read the voltage of the thermistor 122 and convert the voltage value into a digital signal, i.e., a temperature value. In this embodiment, the conversion module 123 includes an analog-to-digital converter, i.e., an a/D converter (ADC).
The heating and temperature measuring switching circuit 10 further comprises a control module 14, wherein the control module 14 is connected between the first ends 111 of the two wires 11. In this embodiment, the control module 14 is electrically connected to the conversion module 123, and the control module 14 is configured to control the power flowing in from the first end 111 of any one of the two wires 11 according to the temperature value. Specifically, the control module 14 includes a micro control unit (Microcontroller Unit; MCU) and an H-type full bridge circuit. And the digital signal obtained by the ADC is transmitted to the MCU, and the MCU judges whether the temperature is over or not according to the digital signal, so that the full-bridge circuit is controlled to change the inflow direction of the current. That is, when the current flows from the first end 111 of the wire B, the MCU determines an over temperature according to the digital signal measured by the ADC, controls the full bridge circuit to flow the current from the first end 111 of the wire a. The MCU can control the full bridge circuit to allow current to flow from the first end 111 of the wire B at regular time, thereby monitoring the temperature.
In the above embodiment, the heating and temperature measuring switching circuit of the two-wire heating pipeline based on the diode mainly realizes the heating function and the temperature measuring function by controlling the current direction of the circuit. The heating and temperature measurement switching circuit controls the current direction of the circuit by multiplexing the two heated wires and the unidirectional conductivity of the diode, and can realize different functions of heating and temperature measurement of the heating and temperature measurement switching circuit by changing the current direction.
Please refer to fig. 3 in combination, which is a schematic diagram of a ventilator circuit according to an embodiment of the present application. The ventilator pipeline 1 comprises a pipeline body 30 and a heating and temperature measuring switching circuit 10, wherein the heating and temperature measuring switching circuit 10 is arranged on the pipeline body 30. The specific structure of the heating and temperature measurement switching circuit 10 refers to the above-described embodiment.
In the present embodiment, the two wires 11 of the heating and temperature measuring switching circuit 10 are wound around the pipe body 30, and the heating and temperature measuring switching circuit 10 realizes a heating function of heating the pipe body 30 through the heating load 132. When there are a plurality of heating modules 13, the plurality of heating modules 13 may be equally distributed in the radial direction of the pipe body 30, thereby being capable of uniformly heating the pipe body 30. The temperature measuring module 12 is disposed at one end of the tube 30, and is used for collecting the temperature of the end of the tube 30.
The ventilator pipeline 1 can complete heating of the pipe body 30 and air temperature collection in the pipe at the tail end of the pipe body 30 only by using two wires 11, and meanwhile, the control of the current direction is completed by embedding a control module 14 for controlling the current direction at the tail end of the pipe body 30, so that the switching of heating and temperature measuring functions is controlled. The ventilator pipeline 1 completes the air flow temperature acquisition at the tail end of the pipe body 30 through multiplexing the two heated wires 11, and realizes the scheme that the two-wire pipeline is provided with heating and temperature acquisition. The wiring harness wound on the two-wire pipeline can be reduced, the cost of the breathing machine pipeline 1 is further reduced, the flexibility of the breathing machine pipeline 1 is improved, and the comfort of a user during use is improved.
Because the ventilator circuit 1 adopts all the technical solutions of all the embodiments, at least the advantages brought by the technical solutions of the embodiments are provided, and the description thereof is omitted.
Please refer to fig. 4 in combination, which is a schematic diagram of a ventilator according to an embodiment of the present application. The ventilator 99 includes a main unit 2, a breathing mask 3, and a ventilator circuit 1, and the ventilator circuit 1 is connected between the main unit 2 and the breathing mask 3. The specific structure of the ventilator circuit 1 refers to the above-described embodiments.
In this embodiment, the host 2 is provided with a power supply 201, and the heating and temperature measuring switching circuit 10 of the ventilator circuit 1 is electrically connected to the power supply 201. The body 30 of the ventilator circuit 1 comprises a machine end 31 and a mask end 32 which are opposite, the machine end 31 is connected to the main machine 2, and the mask end 32 is connected to the breathing mask 3. The temperature measuring module 12 of the heating and temperature measuring switching circuit 10 is disposed at the mask end 32, and the first ends 111 of the two wires 11 of the heating and temperature measuring switching circuit 10 are both disposed at the machine end 31. It will be appreciated that the first ends 111 of the two wires 11 are connected to the power supply 201 of the host 2.
Because the ventilator 99 adopts all the technical solutions of all the embodiments, at least the advantages brought by the technical solutions of the embodiments are provided, and will not be described in detail herein.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if and when such modifications and variations of the present application fall within the scope of the claims and their equivalents, the present application is intended to cover such modifications and variations.
The foregoing list of preferred embodiments of the present application is, of course, not intended to limit the scope of the claims hereof, and therefore, equivalent changes as set forth in the claims hereof are intended to fall within the scope of the present application.
Claims (10)
1. A heating and temperature measurement switching circuit, characterized in that the heating and temperature measurement switching circuit comprises:
the two wires comprise a first end and a second end, and the first ends of the two wires are used for being connected with an external power supply;
the temperature measuring module is connected between the second ends of the two wires, the temperature measuring module and the external power supply form a loop, and the temperature measuring module comprises a temperature measuring diode and a thermistor which are connected in series; and
each heating module is connected between the two wires, each heating module and the external power supply form a loop, each heating module comprises a heating diode and a heating load which are connected in series, the current conduction directions of all the heating diodes are the same, and the current conduction directions of all the heating diodes are opposite to the current conduction directions of the temperature measuring diodes.
2. The heating and temperature-measuring switching circuit according to claim 1, wherein the heating and temperature-measuring switching circuit includes a heating mode and a temperature-measuring mode, and the heating and temperature-measuring switching circuit is in the temperature-measuring mode when the temperature-measuring diodes are turned on and the heating diodes are turned off; when the temperature measuring diode is cut off and the heating diode is all conducted, the heating temperature measuring switching circuit is in a heating mode.
3. The heating and thermometry switching circuit of claim 2, wherein current of the external power supply is selectively influx from a first end of either of the two wires such that the heating and thermometry switching circuit is in the heating mode or the thermometry mode.
4. The heating and temperature measurement switching circuit of claim 3, wherein the temperature measurement module further comprises a conversion module connected to the thermistor, the conversion module being configured to measure a voltage of the thermistor to obtain a temperature value.
5. The heating and temperature measurement switching circuit of claim 4, further comprising a control module coupled between the first ends of the two wires, the control module configured to control the power supply to flow from the first end of any one of the two wires based on the temperature value.
6. A ventilator circuit, the ventilator circuit comprising:
a tube body; and
the heating and temperature measurement switching circuit according to any one of claims 1 to 5, which is provided to the pipe body.
7. The ventilator circuit of claim 6, wherein the two wires of the heating and thermometry switching circuit are wound around the tube.
8. A ventilator comprising a main unit, a respiratory mask and a ventilator circuit as claimed in claim 6 or claim 7, wherein the ventilator circuit is connected between the main unit and the respiratory mask.
9. The ventilator of claim 8, wherein the host computer is provided with a power source, and wherein the ventilator circuit heating and temperature measuring switching circuit is electrically connected to the power source.
10. The ventilator of claim 9, wherein the body of the ventilator circuit comprises a machine end and a mask end, the machine end coupled to the main machine, the mask end coupled to the respiratory mask; the temperature measuring module of the heating temperature measuring switching circuit is arranged at the end of the face mask, and the first ends of the two wires of the heating temperature measuring switching circuit are arranged at the end of the machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223395633.6U CN219271874U (en) | 2022-12-15 | 2022-12-15 | Heating temperature measurement switching circuit, breathing machine pipeline and breathing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223395633.6U CN219271874U (en) | 2022-12-15 | 2022-12-15 | Heating temperature measurement switching circuit, breathing machine pipeline and breathing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219271874U true CN219271874U (en) | 2023-06-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223395633.6U Active CN219271874U (en) | 2022-12-15 | 2022-12-15 | Heating temperature measurement switching circuit, breathing machine pipeline and breathing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219271874U (en) |
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- 2022-12-15 CN CN202223395633.6U patent/CN219271874U/en active Active
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