CN218270891U - Water flow monitoring circuit and medical equipment cooling system - Google Patents
Water flow monitoring circuit and medical equipment cooling system Download PDFInfo
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- CN218270891U CN218270891U CN202222215277.9U CN202222215277U CN218270891U CN 218270891 U CN218270891 U CN 218270891U CN 202222215277 U CN202222215277 U CN 202222215277U CN 218270891 U CN218270891 U CN 218270891U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 82
- 238000012544 monitoring process Methods 0.000 title claims abstract description 61
- 238000001816 cooling Methods 0.000 title claims abstract description 36
- 230000006698 induction Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 50
- 238000012806 monitoring device Methods 0.000 claims description 2
- 230000008054 signal transmission Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001052 transient effect Effects 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000001960 triggered effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000010724 circulating oil Substances 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model relates to a rivers flow monitoring circuit and medical equipment cooling system, rivers flow monitoring circuit includes: the flow monitoring circuit comprises a filter circuit and a steady-state circuit which are electrically connected, and the water flow sensor is electrically connected to the filter circuit and generates a pulse signal through the induction of flow change. The utility model discloses based on the rivers sensor, with pulse signal transmission to the flow monitoring circuit that the rivers sensor was monitored, require in a flexible way rivers sensor mounted position and direction, the flow monitoring circuit is low to the misstatement rate of bubble, and is anti-interference strong.
Description
Technical Field
The utility model relates to a medical equipment coolant liquid circulation technical field especially relates to a rivers flow monitoring circuit and medical equipment cooling system.
Background
The mechanical flow switch is often adopted in a cooling system of medical equipment to monitor flow, a magnetic core in the mechanical flow switch is pushed by water flow to generate displacement, and the magnetic core displacement drives a magnetic source to generate a magnetic control effect to enable the water flow switch to output a switch signal, so that the mechanical flow switch has strict requirements on the installation direction, when bubbles or unstable flow velocity appear in water flow, the displacement of the magnetic core in the flow switch can change, the output signal is turned over by mistake, and the error report occurs to cause the equipment to stop running. Therefore, how to reduce the water flow interference and realize accurate flow monitoring is an urgent problem to be solved.
SUMMERY OF THE UTILITY MODEL
In view of the above, it is desirable to provide a water flow monitoring circuit and a cooling system for medical equipment, so as to overcome the problem that the flow monitoring of the cooling system for medical equipment in the prior art is inaccurate due to the influence of water flow.
The utility model provides a water flow monitoring circuit, include: the flow monitoring circuit comprises a filter circuit and a steady-state circuit which are electrically connected, and the water flow sensor is electrically connected to the filter circuit and generates a pulse signal through the induction of the change of the water flow.
Further, the water flow sensor comprises a magnetic rotor and a hall sensor, and the hall sensor is electrically connected to the filter circuit, wherein the hall sensor senses the change of the magnetic rotor along with the flow of the water flow to generate the pulse signal.
Further, the filter circuit comprises a filter resistor and a first filter capacitor, wherein one end of the filter resistor is electrically connected with the water flow sensor, and the other end of the filter resistor is respectively electrically connected with one end of the first filter capacitor and the steady-state circuit; one end of the first filter capacitor is electrically connected with the stable state circuit, and the other end of the first filter capacitor is grounded.
Further, the steady-state circuit comprises a timing circuit, a pull-up resistor circuit, a trigger and a driving circuit, wherein the timing circuit, the pull-up resistor circuit and the driving circuit are respectively electrically connected to the trigger.
Further, the timing circuit comprises a timing resistor and a timing capacitor, one end of the timing resistor is electrically connected with a power supply, the other end of the timing resistor is electrically connected with the second pin of the trigger and one end of the timing capacitor respectively, the first pin of the trigger is electrically connected with one end of the timing capacitor, the other end of the timing capacitor is electrically connected with the second pin of the trigger, and the timing period of the timing resistor and the timing capacitor is set to be a preset multiple of the real-time period of the pulse signal.
Further, the pull-up resistor circuit includes a pull-up resistor and a second filter capacitor, one end of the pull-up resistor is electrically connected to a power supply, the other end of the pull-up resistor is electrically connected to one end of the second filter capacitor and the third pin of the trigger, respectively, one end of the second filter capacitor is electrically connected to the third pin of the trigger, and the other end of the second filter capacitor is grounded.
Furthermore, the driving circuit comprises a rectifier diode, a first current-limiting resistor and a triode, wherein the anode of the rectifier diode is electrically connected with the trigger, the cathode of the rectifier diode is electrically connected with one end of the first current-limiting resistor, the other end of the first current-limiting resistor is electrically connected with the base electrode of the triode, the emitting electrode of the triode is grounded, and the collecting electrode of the triode is used for being connected with an external control circuit.
Further, the steady-state circuit further comprises an alarm circuit, the alarm circuit comprises a second current-limiting resistor and a light-emitting element, one end of the second current-limiting resistor is electrically connected with the trigger, the other end of the second current-limiting resistor is electrically connected with one end of the light-emitting element, and the other end of the light-emitting element is grounded.
Furthermore, the light emitting element is a light emitting diode, the anode of the light emitting diode is electrically connected with the second current limiting resistor, and the cathode of the light emitting diode is grounded.
The utility model provides a medical equipment cooling system, include as above rivers flow monitoring circuit.
Compared with the prior art, the beneficial effects of the utility model include: by arranging the water flow sensor, when liquid passes through the water flow sensor, the pulse signal changes along with the change of the flow, and the changed pulse signal is input to the flow monitoring circuit to carry out corresponding signal processing, so that the flow of the water flow is monitored; the pulse signals output by the water flow sensor are filtered through an electric connection structure of a filter circuit of the flow monitoring circuit and the water flow sensor; through the circuit structure of the steady-state circuit, the pulse signal is converted into high level or low level and is output to an external control circuit, so that whether the flow is normal or not is judged. To sum up, the utility model discloses based on the rivers sensor, with pulse signal transmission to the flow monitoring circuit that the rivers sensor was monitored, require in a flexible way rivers sensor mounted position and direction, the flow monitoring circuit is low to the wrong report rate of bubble, anti-interference strong.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a water flow monitoring circuit provided by the present invention;
fig. 2 is a schematic structural diagram of an embodiment of a flow monitoring circuit provided by the present invention;
FIG. 3 shows an embodiment of a T-junction in a water flow monitoring circuit 1 、T 2 And (3) a waveform schematic diagram.
Detailed Description
The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Further, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Reference throughout this specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the described embodiments can be combined with other embodiments.
In the description of the present invention, the sequence numbers of the steps in the above embodiments do not mean the order of execution, and the execution order of the processes should be determined by their functions and internal logics, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The utility model provides a rivers flow monitoring circuit and medical equipment cooling system, through the electric connection structure of rivers sensor and flow monitoring circuit, carry out effectual transmission to the pulse signal that the rivers sensor formed, provide new thinking for further improvement flow monitoring's stability and accuracy.
Before the description of the embodiments, the related words are paraphrased:
medical equipment cooling system: in medical work, because the heat source exists in the medical equipment, and factors influencing the temperature of components in the medical equipment are more, cooling and heat dissipation measures are more. The cooling and heat dissipation modes adopted by the medical equipment mainly comprise a solid radiator heat dissipation mode, a natural air cooling mode, a forced air cooling mode, a circulating water cooling mode, a circulating oil cooling mode and a semiconductor cooling mode; different medical equipment adopts different cooling and heat dissipation modes, and medium and small power medical equipment is commonly cooled by forced air; electronic components or parts which work under the condition of high-temperature environment and have higher heat generation rate in the working process are more suitable to be cooled by a liquid cooling mode with higher cooling efficiency; for components with high heat yield in the working process, when the conventional cooling mode cannot meet the requirement, other cooling modes such as evaporation cooling, heat pipes, boiling evaporation, micro-channel cooling or spray cooling mode, even thermoelectric cooling and the like can be adopted for cooling. Many large medical devices employ two or more heat dissipation methods to cool and dissipate heat from internal components.
Based on the description of the technical terms, when the existing medical equipment cooling system adopts liquid cooling, a mechanical flow switch is often adopted to monitor the flow, and the mechanical flow switch is easily influenced by liquid water flow to generate displacement, so that signal deviation is caused, and phenomena such as false alarm and the like occur. There is therefore a need for a device that more efficiently and accurately monitors the flow of a medical device cooling system.
Fig. 1 shows that fig. 1 is a schematic structural diagram of an embodiment of the water flow monitoring circuit provided by the present invention, including: the water flow monitoring device comprises a water flow sensor 1 and a flow monitoring circuit 2, wherein the flow monitoring circuit 2 comprises a filter circuit 201 and a steady-state circuit 202 which are electrically connected, the water flow sensor 1 is electrically connected to the filter circuit 201, and the water flow sensor 1 generates a pulse signal through the induction of flow change.
In the embodiment of the utility model, by arranging the water flow sensor, when liquid passes through the water flow sensor, the pulse signal changes along with the flow change, and the changed pulse signal is input to the flow monitoring circuit for corresponding signal processing, so as to monitor the flow of water flow; the pulse signals output by the water flow sensor are filtered through an electric connection structure of a filter circuit of the flow monitoring circuit and the water flow sensor; the period of the pulse signal is effectively monitored by setting an electric connection structure of a steady-state circuit and a filter circuit of the flow monitoring circuit, and the pulse signal is converted into a high level or a low level through the circuit structure of the steady-state circuit and is output to an external control circuit, so that whether the flow is normal or not is judged.
In a preferred embodiment, the water flow sensor 1 includes a magnetic rotor and a hall sensor, and the hall sensor is electrically connected to the filter circuit 201, wherein the hall sensor senses a change of the magnetic rotor with a flow rate to generate the pulse signal.
In the embodiment of the utility model, the magnetic rotor is arranged to effectively sense the flow change of water flow; the Hall sensor is arranged to sense the signal which is output by the magnetic rotor and related to the water flow change and form a pulse signal based on the signal, the electromagnetic water flow sensor is formed based on the magnetic rotor and the Hall sensor, the pulse signal is formed through electromagnetic induction, the electromagnetic water flow sensor is not influenced by mechanical displacement, and interference signals are effectively reduced.
As a more specific embodiment, liquid passes through a water flow rotor in the water flow sensor 1 through a valve body, the magnetic rotor is driven to rotate, the rotating speed changes along with the flow of the liquid, and a generated speed change signal is transmitted to a Hall sensor to form a pulse signal. Wherein, the valve body is preferably a plastic valve body.
It should be noted that, the change of the water flow speed drives the change of the speed of the magnetic rotor, the magnetic rotor generates a signal of the change of the rotation speed of the rotor, and the hall sensor generates a corresponding pulse signal through electromagnetic induction and inputs the pulse signal to the flow monitoring circuit.
As a preferred embodiment, referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of the flow monitoring circuit provided in the present invention, where the filter circuit 201 includes a filter resistor R1 and a first filter capacitor C1, where one end of the filter resistor R1 is electrically connected to the water flow sensor 1, and the other end of the filter resistor R1 is electrically connected to one end of the first filter capacitor C1 and the steady-state circuit 202, respectively; one end of the first filter capacitor C1 is electrically connected to the steady-state circuit 202, and the other end of the first filter capacitor C1 is grounded.
The embodiment of the utility model provides an in, set up filter resistance, first filter capacitance, effectively constitute filter circuit, carry out low pass filtering to the pulse signal that rivers sensor sent, effectively get rid of high frequency noise.
As a preferred embodiment, as seen in fig. 2, the steady-state circuit 202 includes a timing circuit 2021, a pull-up resistor circuit 2022, a flip-flop U1, and a driving circuit 2023, wherein the timing circuit 2021, the pull-up resistor circuit 2022, and the driving circuit 2023 are electrically connected to the flip-flop U1, respectively.
In the embodiment of the present invention, the stable circuit 202 is effectively constructed by the timing circuit 2021, the pull-up resistor circuit 2022, the flip-flop U1, and the driving circuit 2023. The role of the steady-state circuit 202 is specifically to effectively flip from steady state to transient under the influence of the pulse signal, and back to transient when the pulse signal disappears. Wherein the steady-state circuit 202 is preferably a retriggerable monostable circuit, and the flip-flop U1 is preferably a monostable flip-flop. It should be noted that, the retriggerable monostable circuit specifically means that after the circuit is triggered by the pulse signal and enters a transient state, if the pulse signal is added again, the circuit will be triggered again.
In a specific embodiment of the present invention, one end of the filter resistor R1 is electrically connected to the first port of the first port device J1, and is electrically connected to the hall sensor of the water flow sensor 1 through the first port device J1 for receiving the pulse signal output by the hall sensor, the other end of the filter resistor R1 is electrically connected to one end of the first filter capacitor C1 and the fifth pin of the trigger U1 in the steady-state circuit 202, respectively, one end of the first filter capacitor C1 is electrically connected to the fifth pin of the trigger U1 in the steady-state circuit 202, and the other end of the first filter capacitor C1 is grounded; the second port of the first port device J1 is grounded, and the third port is electrically connected with a power supply VCC.
As a preferred embodiment, referring to fig. 2, the timing circuit 2021 includes a timing resistor R2 and a timing capacitor C2, one end of the timing resistor R2 is electrically connected to a power source VCC, the other end of the timing resistor R2 is electrically connected to the second pin of the flip-flop U1 and one end of the timing capacitor C2, the first pin of the flip-flop U1 is electrically connected to one end of the timing capacitor C2, and the other end of the timing capacitor C2 is electrically connected to the second pin of the flip-flop U1, wherein a timing period of the timing resistor R2 and the timing capacitor C2 is set to be a preset multiple of a real-time period of the pulse signal.
The embodiment of the utility model provides an in, through timing resistance R2 and timing electric capacity C2's electric connection structure, effectively found timing circuit 2021, realize corresponding timing function for adjust time gathers corresponding pulse signal at specific point of time.
As a more specific example, the preset multiple is two times. In the embodiment of the present invention, the timing period T of the timing resistor R2 and the timing capacitor C2 2 Signal period T of pulse signal set as water flow sensor 1 1 Twice, specifically set as follows:
C 2 ＝1uF；
R 2 ＝2×T 1 ×10 6 Ω；
T 2 ＝2·T 1
in the above formula, C 2 Capacitance value, R, represented as timing capacitor C2 2 Expressed as the resistance value of the timing resistor R2, T 1 Expressed as the real-time period, T, of the pulse signal of the water flow sensor 1 measured in the normal water flow conditions 2 Shown as the timing period of timing resistor R2 and timing capacitor C2.
Thus, by providing the timing capacitor C2 and the timing resistor R2, the timing capacitor C and the timing resistor R together form a timing period T 2 I.e. for the signal period T 1 Twice as much. It should be understood that the preset multiple is not limited to the above numerical value setting, and different settings may be performed according to a specific application scenario, which is not limited herein.
As a preferred embodiment, as seen in fig. 2, the pull-up resistor circuit 2022 includes a pull-up resistor R3 and a second filter capacitor C3, one end of the pull-up resistor R3 is electrically connected to a power source VCC, the other end of the pull-up resistor R3 is electrically connected to one end of the second filter capacitor C3 and the third pin of the flip-flop U1, respectively, and the other end of the second filter capacitor C3 is grounded.
The embodiment of the utility model provides an in, through the electric connection structure of pull-up resistance and second filter capacitance, effectively construct pull-up resistance circuit. The pull-up resistor circuit is used for pulling up the signal level of a preset pin of the trigger U1.
As a more specific example, the steady-state circuit 202 performs filtering through a capacitor C4, one end of the capacitor C4 is grounded, the other end of the capacitor C4 is electrically connected to the power source VCC, and meanwhile, the other end of the capacitor C4 is also electrically connected to the eleventh, thirteenth and sixteen pins of the flip-flop U1. The embodiment of the utility model provides an in, realize the stable input to power VCC effective filtering through electric capacity C4, guarantee the power.
As a preferred embodiment, as seen in fig. 2, the driving circuit 2023 includes a rectifier diode D1, a first current-limiting resistor R4, and a transistor Q1, wherein an anode of the rectifier diode D1 is electrically connected to the trigger U1, a cathode of the rectifier diode D1 is electrically connected to one end of the first current-limiting resistor R4, another end of the first current-limiting resistor R4 is electrically connected to a base of the transistor Q1, an emitter of the transistor Q1 is grounded, and a collector of the transistor Q1 is used for connecting an external control circuit so as to output a monitoring signal to the external control circuit, where the rectifier diode D1 is unidirectionally conducted to prevent current from flowing; and under the trigger of the level signal of the trigger U1, the triode Q is switched on or off, and then a signal with normal flow or fault is output.
The embodiment of the utility model provides an in, through the electric connection structure of rectifier diode, first current-limiting resistor and triode, effectively found drive circuit, its effect is the signal that the control circuit output flow to the outside is normal or trouble.
In a specific embodiment of the present invention, the triode Q1 is an NPN type low power triode, the positive electrode of the rectifier diode D1 is electrically connected to the sixth pin of the trigger U1, and when the output level of the sixth pin of the trigger U1 is a high level, the triode Q1 is turned on and the flow rate is normal; when the output level of the sixth pin of the trigger U1 is low level, the triode Q1 is disconnected, and the flow rate is failed.
As a more specific embodiment, the collector of the transistor Q1 is electrically connected to a first pin of the second port device J2, a second pin of the second port device J2 is grounded, a third pin of the second port device J2 is electrically connected to the power supply VCC, and the second port device J2 is an output port for connecting to an external control circuit (single chip) so as to output a monitoring signal to an external control circuit device.
As a preferred embodiment, referring to fig. 2, the steady-state circuit 202 further includes an alarm circuit 2024, the alarm circuit 2024 includes a second current-limiting resistor R5 and a light-emitting element, one end of the second current-limiting resistor R5 is electrically connected to the trigger U1, the other end of the second current-limiting resistor R5 is electrically connected to one end of the light-emitting element, and the other end of the light-emitting element is grounded, wherein under the trigger of a level signal of the trigger U1, the light-emitting element emits light to alarm the flow fault. It can be understood that the light emitting element may be a light emitting diode or a warning light, and may be set differently according to a specific application scenario, which is not limited herein.
In the embodiment of the present invention, the alarm circuit is effectively constructed by the electrical connection structure of the second current-limiting resistor and the light-emitting element. The flow fault alarm has the specific function that when the flow fault is monitored, the light-emitting element emits light, and the flow fault alarm is realized.
In a specific embodiment of the present invention, the light emitting element is a red light emitting diode D2 for flow fault alarm indication, the seventh pin of the trigger U1 is connected to one end of the second current limiting resistor R5, the other end of the second current limiting resistor R5 is connected to the anode of the light emitting diode D2, and the cathode of the light emitting diode D2 is grounded; when the output level of the seventh pin of the trigger U1 is turned from low level to high level, the light emitting diode D2 is lightened under high level, and the flow fault is alarmed.
In a specific embodiment of the present invention, the flip-flop U1 is a double-precision flip-flop capable of repeatedly triggering monostable state, and the flip-flop U1 is used to convert the input periodic pulse signal into high level or low level output. Except for the connection description of the first pin to the third pin, the fifth pin to the seventh pin, the eleventh pin, the thirteenth pin and the sixteenth pin, the fourth pin and the eighth pin of the trigger U1 are grounded, and the twelfth pin and the fifteenth pin of the trigger U1 are grounded, so that the anti-interference effect is achieved. It should be noted that, when the fifth pin of the flip-flop U1 receives a periodic pulse signal, that is, receives an input signal, the sixth pin and the seventh pin of the flip-flop U1 output a high level or a low level, that is, receive an output signal.
With reference to fig. 2 and 3, fig. 3 shows T in the water flow monitoring circuit provided by the present invention 1 、T 2 The waveform schematic diagram illustrates the circuit principle of the present invention as follows:
the equipment cooling circulation system generates a pulse signal through the water flow sensor, the pulse signal output by the water flow sensor 1 is subjected to low-pass filtering through a filter circuit 201 of the flow monitoring circuit, the pulse signal is converted into a high level or a low level through a repeatable triggering monostable circuit 202 and is output to an external control circuit, so that whether the flow is normal or not is judged, and if the sixth pin of the trigger U1 outputs the high level, the flow is normal; if the seventh pin of the trigger U1 outputs high level, the light emitting diode D2 emits red light to prompt an alarm.
For the accuracy of the monitoring of guaranteeing the flow, eliminate or reduce the error that bubble or other interference brought, influence the flow mistake of reporting, the utility model discloses the design has suitable allowance, has compromise flow monitoring's sensitivity, accuracy and interference killing feature, timing element timing resistance R2, timing electric capacity C2's of monostable trigger U1 timing cycle T 2 Real-time period T of pulse signal set as water flow sensor 1 Twice as much, i.e. setting C 2 ＝1uF，R 2 ＝2×T 1 ×10 6 Ω；
Wherein a timing period T is set 2 Is not suitable for smaller values or values close to T 1 Otherwise, when the actual water flow is normal, if bubbles are accidentally encountered, the real-time period T of the pulse signal output at the moment is caused 1 Increase when the real-time period T 1 Exceeding the timing period T 2 At the time, even if the actual water flow is normal, due to the set timing period T 2 Is small, T 1 Easily exceed T 2 And the seven output level of the pin of the monostable trigger U1 is turned to high level, the light emitting diode D2 is lightened and emits red light, and false alarm occurs.
Wherein a timing period is setT 2 Should not be too large, more than twice T 1 Otherwise, when the actual water flow is abnormal, such as the circulation cooling system is blocked or the water flow is small, the flow rate is changed, namely the real-time period T of the pulse signal of the water flow sensor 1 Increase, at which time even if a flow failure occurs, due to the timing period T 2 Too large a value of (C), real time period T 1 Still not greater than the timing period T 2 The output level of the sixth pin of the trigger U1 cannot be inverted from the high level to the low level, and the light emitting diode D2 is not turned on and emits red light, that is, the flow fault actually occurs, and the alarm cannot be given.
Referring to fig. 3, a pulse signal (square wave signal) output by the water flow sensor 1 is input to the first port device J1, then the monostable trigger U1 converts the pulse signal into a high level or a low level to be output, and whether the flow rate is normal is determined by whether a signal output by the second port device J2 is a high level or a low level.
The embodiment of the utility model provides a medical equipment cooling system is still provided, include as above rivers flow monitoring circuit.
The embodiment of the utility model provides an in, through rivers flow monitoring circuit, realize the flow monitoring of the accuracy in the medical equipment cooling process.
The utility model discloses a water flow monitoring circuit and a medical equipment cooling system, through setting up a water flow sensor, when liquid passes through the water flow sensor, a pulse signal changes along with the flow change, the changed pulse signal is input to the flow monitoring circuit to carry out corresponding signal processing, thereby monitoring the water flow; the pulse signals output by the water flow sensor are filtered through an electric connection structure of a filter circuit of the flow monitoring circuit and the water flow sensor; the period of the pulse signal of the flow monitoring circuit is effectively monitored by the aid of an electric connection structure of the steady-state circuit of the flow monitoring circuit and the water flow sensor, the pulse signal is converted into a high level or a low level through the circuit structure of the steady-state circuit, and the high level or the low level is output to an external control circuit, so that whether the flow is normal or not is judged.
The utility model discloses technical scheme, based on the rivers sensor, with pulse signal transmission to the filter circuit and the steady state circuit of flow monitoring circuit that the rivers sensor was monitored, require in a flexible way rivers sensor mounted position and direction, the flow monitoring circuit is low to the wrong report rate of bubble, and is anti-interference strong.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.
Claims (10)
1. A water flow monitoring circuit, comprising: the water flow monitoring device comprises a water flow sensor (1) and a flow monitoring circuit (2), wherein the flow monitoring circuit (2) comprises a filter circuit (201) and a steady-state circuit (202) which are electrically connected, the water flow sensor (1) is electrically connected to the filter circuit (201), and the water flow sensor (1) generates a pulse signal through induction of water flow change.
2. The water flow monitoring circuit according to claim 1, wherein the water flow sensor (1) comprises a magnetic rotor and a hall sensor, and the hall sensor is electrically connected to the filter circuit (201), wherein the hall sensor senses the magnetic rotor as a function of the water flow to generate the pulse signal.
3. The water flow monitoring circuit according to claim 1, wherein the filter circuit (201) comprises a filter resistor (R1) and a first filter capacitor (C1), wherein one end of the filter resistor (R1) is electrically connected to the water flow sensor (1), and the other end of the filter resistor (R1) is electrically connected to one end of the first filter capacitor (C1) and the steady-state circuit (202), respectively; one end of the first filter capacitor (C1) is electrically connected with the steady-state circuit (202), and the other end of the first filter capacitor (C1) is grounded.
4. The water flow monitoring circuit according to claim 1, wherein the steady-state circuit (202) comprises a timing circuit (2021), a pull-up resistor circuit (2022), a trigger (U1) and a driving circuit (2023), and the timing circuit (2021), the pull-up resistor circuit (2022) and the driving circuit (2023) are electrically connected to the trigger (U1), respectively.
5. The water flow monitoring circuit according to claim 4, wherein the timing circuit (2021) comprises a timing resistor (R2) and a timing capacitor (C2), one end of the timing resistor (R2) is electrically connected to a power supply (VCC), the other end of the timing resistor (R2) is electrically connected to the second pin of the flip-flop (U1) and one end of the timing capacitor (C2), respectively, the first pin of the flip-flop (U1) is electrically connected to one end of the timing capacitor (C2), the other end of the timing capacitor (C2) is electrically connected to the second pin of the flip-flop (U1), and a timing period of the timing resistor (R2) and the timing capacitor (C2) is set to a preset multiple of a real-time period of the pulse signal.
6. The water flow monitoring circuit according to claim 4, wherein the pull-up resistor circuit (2022) comprises a pull-up resistor (R3) and a second filter capacitor (C3), one end of the pull-up resistor (R3) is electrically connected to a power supply (VCC), the other end of the pull-up resistor (R3) is electrically connected to one end of the second filter capacitor (C3) and the third pin of the trigger (U1), respectively, one end of the second filter capacitor (C3) is electrically connected to the third pin of the trigger (U1), and the other end of the second filter capacitor (C3) is grounded.
7. The water flow monitoring circuit according to claim 4, wherein the driving circuit (2023) comprises a rectifier diode (D1), a first current limiting resistor (R4) and a triode (Q1), wherein an anode of the rectifier diode (D1) is electrically connected to the trigger (U1), a cathode of the rectifier diode (D1) is electrically connected to one end of the first current limiting resistor (R4), another end of the first current limiting resistor (R4) is electrically connected to a base of the triode (Q1), an emitter of the triode (Q1) is grounded, and a collector of the triode (Q1) is used for connecting to an external control circuit.
8. The circuit for monitoring water flow rate according to claim 4, wherein the steady-state circuit (202) further comprises an alarm circuit (2024), the alarm circuit (2024) comprises a second current limiting resistor (R5) and a light emitting element, one end of the second current limiting resistor (R5) is electrically connected to the trigger (U1), the other end of the second current limiting resistor (R5) is electrically connected to one end of the light emitting element, and the other end of the light emitting element is grounded.
9. The water flow monitoring circuit according to claim 8, wherein the light emitting element is a light emitting diode (D2), the anode of the light emitting diode (D2) is electrically connected to the second current limiting resistor (R5), and the cathode of the light emitting diode (D2) is grounded.
10. A medical equipment cooling system comprising a water flow monitoring circuit according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222215277.9U CN218270891U (en) | 2022-08-22 | 2022-08-22 | Water flow monitoring circuit and medical equipment cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222215277.9U CN218270891U (en) | 2022-08-22 | 2022-08-22 | Water flow monitoring circuit and medical equipment cooling system |
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| CN218270891U true CN218270891U (en) | 2023-01-10 |
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