Infusion pump heating protection system and device and infusion pump device

Abstract

The utility model relates to an infusion pump heating protection system, which comprises a temperature acquisition module, a hysteresis comparison module, a control module and a driving switch module, and is characterized in that the temperature acquisition module is connected with a heating assembly in an infusion pump and is used for acquiring a temperature feedback signal of the heating assembly; the hysteresis comparison module is connected with the output end of the temperature acquisition module; the control module is connected with a first output end of the hysteresis comparison module and the temperature acquisition module, and the control module is used for outputting a pulse width modulation signal to the temperature acquisition module according to a first output signal of the hysteresis comparison module; and the driving switch module is arranged on a driving circuit of the heating assembly, is connected with a second output end of the hysteresis comparison module, and is used for controlling the on-off of the driving circuit according to a second output signal of the hysteresis comparison module. According to the embodiment of the invention, the temperature monitoring of the infusion pump is realized through a hardware structure mode, the driving circuit of the heating assembly can be quickly switched off under the condition that the temperature is abnormal, and the heating protection function of the infusion pump is realized.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an infusion pump heating protection system, equipment and infusion pump equipment. Background Art

[0002] The infusion pump heating system in the prior art is often prone to unstable temperature control of the heater, which leads to temperature abnormalities and damage to the infusion pump. Monitoring the temperature only through the PTC temperature sensor and the temperature recognition program of the controller will result in time differences. If the temperature cannot be adjusted in time or the infusion pump cannot be protected after the temperature rises, major medical safety accidents may occur.

[0003] Therefore, there is an urgent need for an infusion pump heating protection solution that can promptly respond to abnormal temperature conditions of the infusion pump. Utility Model Content

[0004] In order to solve the above technical problems, it is necessary to provide an infusion pump heating protection system, equipment and infusion pump equipment that can effectively prevent the infusion pump from being damaged due to abnormal temperature increase.

[0005] The specific plan is as follows:

[0006] In a first aspect, this embodiment provides an infusion pump heating protection system, comprising:

[0007] A temperature acquisition module, the temperature acquisition module is connected to the heating component in the infusion pump and is used to collect a temperature feedback signal of the heating component;

[0008] A hysteresis comparison module, wherein the hysteresis comparison module is connected to the output end of the temperature acquisition module;

[0009] A control module, the control module is connected to the first output end of the hysteresis comparison module and the temperature acquisition module, and the control module is used to output a pulse width modulation signal to the heating component according to the first output signal of the hysteresis comparison module;

[0010] A driving switch module is provided on the driving circuit of the heating component, and the driving switch module is also connected to the second output end of the hysteresis comparison module, and is used to control the on-off of the driving circuit according to the second output signal of the hysteresis comparison module.

[0011] In one of the embodiments, the hysteresis comparison module includes a first hysteresis comparison circuit and a second hysteresis comparison circuit;

[0012] The input end of the first hysteresis comparison circuit is connected to the first output end of the temperature acquisition module, the first output end of the first hysteresis comparison circuit is connected to the control module, and the second output end of the first hysteresis comparison circuit is connected to the driving switch module;

[0013] The input end of the second hysteresis comparison circuit is connected to the second output end of the temperature acquisition module, the first output end of the second hysteresis comparison circuit is connected to the control module, and the second output end of the second hysteresis comparison circuit is connected to the driving switch module.

[0014] In one of the embodiments, the first hysteresis comparison circuit includes a first voltage follower unit and a first comparison unit, and the second hysteresis comparison circuit includes a second voltage follower unit and a second comparison unit;

[0015] The first output end of the first voltage follower unit is connected to the control module, the second output end of the first voltage follower unit is connected to the first input end of the first comparison unit, the second input end of the first comparison unit is used to access the reference voltage signal, and the output end of the first comparison unit is connected to the driving switch module;

[0016] The first output end of the second voltage follower unit is connected to the control module, the second output end of the second voltage follower unit is connected to the first input end of the second comparison unit, the second input end of the second comparison unit is used to access the reference voltage signal, and the output end of the second comparison unit is connected to the driving switch module.

[0017] In one of the embodiments, the hysteresis comparison module further includes an AND gate circuit;

[0018] The second output end of the first hysteresis comparison circuit and the second output end of the second hysteresis comparison circuit are both connected to the driving switch module through the AND gate circuit.

[0019] In one of the embodiments, the first comparison unit includes a first hysteresis comparator, a first reference voltage circuit and a first output circuit;

[0020] A first input terminal of the first hysteresis comparator is connected to a second output terminal of the first voltage follower unit, and a second input terminal of the first hysteresis comparator is connected to the first reference voltage circuit;

[0021] The output end of the first hysteresis comparator is connected to the driving switch module through the first output circuit.

[0022] In one embodiment, the second comparison unit includes a second hysteresis comparator, a second reference voltage circuit and a second output circuit;

[0023] A first input terminal of the second hysteresis comparator is connected to a second output terminal of the second voltage follower unit, and a second input terminal of the second hysteresis comparator is connected to the second reference voltage circuit;

[0024] The output end of the second hysteresis comparator is connected to the driving switch module through the second output circuit.

[0025] In one of the embodiments, the driving switch module includes a first switch unit, a second switch unit, a third switch unit and a fourth switch unit;

[0026] The first switch unit and the second switch unit are respectively arranged on the driving circuit of the heating component, and when the first switch unit or the second switch unit is turned off, the driving circuit is turned off; when the first switch unit and the second switch unit are turned on, the driving circuit is turned on;

[0027] The control end of the first switch unit is grounded through the third switch unit, and the control end of the second switch unit is grounded through the fourth switch unit; the control end of the third switch unit is connected to the second output end of the hysteresis comparison module; and the control end of the fourth switch unit is connected to the control module.

[0028] In one embodiment, the first switch unit includes a first transistor, the second switch unit includes a second transistor, the third switch unit includes a third transistor, and the fourth switch unit includes a fourth transistor;

[0029] The input end of the first transistor is connected to the output end of the second transistor, the input end of the second transistor is used to receive a driving electrical signal, and the output end of the first transistor is connected to the heating component;

[0030] The control end of the first transistor is connected to the output end of the third transistor, the control end of the second transistor is connected to the output end of the fourth transistor, and the input end of the third transistor and the input end of the fourth transistor are grounded;

[0031] The control end of the third transistor is connected to the output end of the hysteresis comparison module, and the control end of the fourth transistor is connected to the control module.

[0032] In a second aspect, this embodiment provides an infusion pump heating protection device, including the infusion pump heating protection system described in the first aspect.

[0033] In a third aspect, this embodiment provides an infusion pump device, including the infusion pump heating protection device of the second aspect.

[0034] In summary, the present application provides a heating protection system for an infusion pump, including a temperature acquisition module, a hysteresis comparison module, a control module and a drive switch module, wherein the temperature acquisition module is connected to a heating component in the infusion pump, and is used to collect a temperature feedback signal of the heating component; the hysteresis comparison module is connected to the output end of the temperature acquisition module; the control module is connected to the first output end of the hysteresis comparison module and the temperature acquisition module, and the control module is used to output a pulse width modulation signal to the temperature acquisition module according to the first output signal of the hysteresis comparison module; the drive switch module is arranged on the drive circuit of the heating component, and the drive switch module is connected to the second output end of the hysteresis comparison module, and is used to control the on and off of the drive circuit according to the second output signal of the hysteresis comparison module. The embodiment of the present application realizes the temperature monitoring of the infusion pump by means of a hardware structure, and can quickly shut down the drive circuit of the heating component when the temperature is abnormal, thereby realizing the heating protection function of the infusion pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 is a structural block diagram of a heating protection system for an infusion pump in an embodiment;

[0037] Figure 2 A circuit diagram of a temperature acquisition module of a heating protection system for an infusion pump in an embodiment;

[0038] Figure 3 is a structural block diagram of a heating protection system for an infusion pump in another embodiment;

[0039] Figure 4 A circuit diagram of a hysteresis comparison module of a heating protection system for an infusion pump in an embodiment;

[0040] Figure 5 The figure is a circuit diagram of a driving switch module of a heating protection system for an infusion pump in an embodiment.

[0041] Description of reference numerals:

[0042] Temperature acquisition module-110; hysteresis comparison module-120; first hysteresis comparison circuit-121; second hysteresis comparison circuit-122; AND gate circuit-123; control module-130; drive switch module-140;

[0043] Heating component-210; driving circuit-220. DETAILED DESCRIPTION

[0044] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0046] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0047] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0048] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0049] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0050] In the process of clinical rehabilitation and treatment, patients are usually treated by infusion. During infusion, since the liquid temperature of the medicine or blood is low, an infusion pump heating component is required to heat the infusion pipeline so that the medicine or blood in the infusion pipeline is heated to a suitable temperature and will not cause complications such as coldness, numbness or swelling of the patient's limbs when infused into the patient's body.

[0051] However, the existing infusion pump heating system is often unable to respond to abnormal temperature of the infusion pump in a timely manner, regulate the temperature of the infusion pump, and handle abnormal conditions in a timely manner. This embodiment provides an infusion pump heating protection system that responds to abnormally high or low temperatures of the infusion pump in a timely manner, which can provide patients with a better infusion experience while ensuring the safety of the infusion pump equipment and avoiding medical accidents caused by abnormal infusion pump equipment.

[0052] like Figure 1 As shown, this embodiment provides an infusion pump heating protection system, including a temperature acquisition module 110 , a hysteresis comparison module 120 , a control module 130 and a drive switch module 140 .

[0053] Specifically, the temperature acquisition module 110 is connected to the heating component 210 in the infusion pump, and the temperature acquisition module 110 is used to collect the temperature feedback signal of the heating component 210 .

[0054] In a specific embodiment, the heating component 210 is used to adjust the temperature of the infusion pipe of the infusion pump so that the temperature of the infusion pipe is heated to a specified target temperature range. It should be noted that the specific type of the heating component 210 is not limited in this embodiment, and a suitable heating device can be used according to the actual application scenario. For example, the heating component 210 can be a heating accessory or heating device connected to the infusion pipe of the infusion pump.

[0055] Specifically, the heating assembly 210 includes a plurality of fuses consisting of thermistors.

[0056] Specifically, the temperature acquisition module 110 may be a temperature sensor or a temperature signal interface for acquiring a temperature feedback signal. For example, the temperature feedback signal TEMP-NTC1 and the temperature feedback signal TEMP-NTC2 are both temperature feedback signals of the heating component 210 acquired by the temperature acquisition module 110 .

[0057] For example, if Figure 2 As shown, the temperature acquisition module 110 may be an interface J1, and the interface J1 may acquire and transmit the temperature feedback signal TEMP-NTC1 and the temperature feedback signal TEMP-NTC2. In addition, the interface J1 may also provide a power signal HEAT-12V for the heating component 210. It should be noted that the specific circuit structure of the temperature acquisition module 110 may be adaptively configured according to the actual application scenario, and is only exemplified here.

[0058] Specifically, the temperature feedback signal can accurately characterize the temperature value of the infusion pipeline of the infusion pump. In the specific application process, the temperature acquisition module 110 can collect the resistance change of the thermistor in the infusion pump, and obtain the temperature value of the infusion pipeline heated by the infusion pump through the preset resistance-temperature correspondence. It should be noted that the preset resistance-temperature correspondence can be obtained through the relationship between the temperature and resistance of the internal fuse of the heating component 210 provided by the manufacturer.

[0059] Specifically, the hysteresis comparison module 120 is connected to the output end of the temperature acquisition module 110. After the temperature acquisition module 110 acquires the temperature feedback signal, it transmits the temperature feedback signal to the hysteresis comparison module 120, and performs preprocessing on the temperature feedback signal and temperature threshold determination.

[0060] Specifically, the hysteresis comparison module 120 obtains the temperature feedback signal collected by the temperature acquisition module 110, pre-processes the temperature feedback signal, and obtains a first output signal and a second output signal. The output end of the first output signal is connected to the control module 130, so that the control module 130 determines the real-time temperature value of the infusion pipeline of the infusion pump according to the first output signal, and adjusts the driving signal of the heating component 210 according to the real-time temperature value, so that the heating temperature of the heating component 210 always falls within the preset temperature range.

[0061] The hysteresis comparison module 120 compares the second output signal with the reference voltage signal. In actual application scenarios, since the transmission characteristic of the hysteresis comparator has the shape of a "hysteresis" curve, the hysteresis comparison circuit has the characteristics of including two thresholds when the input signal gradually increases or decreases. The hysteresis comparison module 120 can obtain two temperature thresholds based on the reference voltage signal, namely a high temperature threshold and a low temperature threshold.

[0062] For example, for an infusion pump, at 25°C, the temperature feedback signal received by the hysteresis comparison module 120 is about 1.1V, and at 50°C, the temperature feedback signal received by the hysteresis comparison module 120 is about 1.398V. The reference voltage signal in the hysteresis comparison module 120 is set to 1.1V, and by changing the threshold characteristics in the hysteresis comparison module 120, the threshold voltage corresponding to the high temperature threshold is adjusted to 1.39V, and the threshold voltage corresponding to the low temperature threshold is adjusted to 1V.

[0063] In a specific embodiment, if the temperature value represented by the collected temperature feedback signal exceeds 50°C, the high level signal output by the hysteresis comparison module 120 is converted into a low level signal. If the temperature value represented by the collected temperature feedback signal is lower than 25°C, the low level signal output by the hysteresis comparison module 120 is converted into a high level signal.

[0064] The output signal of the hysteresis comparison module 120 can form a switch signal to control the on-off state of the driving switch module 140 to control the on-off state of the driving circuit 220 of the heating component 210 .

[0065] The control module 130 is connected to the first output terminal of the hysteresis comparison module 120 and the temperature acquisition module 110, and the control module 130 is used to output a pulse width modulation signal to the heating component 210 according to the first output signal of the hysteresis comparison module 120;

[0066] In a specific embodiment, the control module 130 may be a microprocessor (MCU) and associated circuits. The control module 130 may determine the temperature value of the heating component 210 according to the first output signal, and adjust the drive signal accordingly according to the temperature value. It should be noted that the specific controller type of the control module 130 may be configured according to the needs of the actual application scenario, and the present embodiment does not limit the type of the control module 130.

[0067] For example, when the control module 130 determines that the temperature is close to the high temperature threshold, it can output a smaller pulse width modulation signal to the heating component 210, so that the heating component 210 heats the infusion pipeline at a lower temperature. It can also output a larger pulse width modulation signal to the heating component 210 when it is determined that the temperature is close to the low temperature threshold, so that the heating component 210 heats the infusion pipeline at a higher temperature. Specifically, the control module 130 needs to control the working state of the heating component 210 so that the infusion pipeline is always at the target temperature. Among them, the target temperature is the ideal temperature of the infusion pipeline set in advance by the user.

[0068] It should be noted that the control module 130 can directly control the heating component 210 to stop working when it is determined that the temperature is greater than or equal to the high temperature threshold or less than or equal to the low temperature threshold.

[0069] The driving switch module 140 is disposed on the driving circuit 220 of the heating component 210 . The driving switch module 140 is also connected to the second output terminal of the hysteresis comparison module 120 , and is used to control the on and off of the driving circuit 220 according to the second output signal of the hysteresis comparison module 120 .

[0070] Specifically, the driving switch module 140 is composed of a hardware switching circuit, and can change the on-off state based on the second output signal of the hysteresis comparison module 120 or the driving signal of the control module 130. In this embodiment, by setting the driving switch module 140 on the driving circuit 220 of the heating component 210, the on-off state of the driving circuit 220 can be controlled by changing the on-off state of the driving switch module 140.

[0071] In a specific embodiment, when the driving switch module 140 is in an off state, the driving circuit 220 is also in an off state. At this time, the driving circuit 220 cannot normally supply power to the heating component 210, and the heating component 210 is shut down.

[0072] When the driving switch module 140 is in the on state, the driving circuit 220 is in the on state. At this time, the driving circuit 220 supplies power to the heating component 210 according to the driving signal sent by the control module 130, so that the heating component 210 heats the infusion pipeline according to the corresponding driving signal.

[0073] In summary, the embodiment of the present application provides an infusion pump heating protection system, which can simultaneously monitor the temperature feedback signal of the heating component through the control module and the hysteresis comparison module, and when the temperature feedback signal is abnormal, promptly control the drive switch module to shut down the drive circuit of the heating component, and prevent the abnormal heating of the heating component from causing abnormal temperature of the infusion pipeline through multiple protection means. In addition, this embodiment can not only realize the heating temperature control of the heating component through the control module, but also respond to the abnormal temperature through the on-off of the hardware circuit in response to the fault state of the control module.

[0074] In one embodiment, if Figure 3 As shown, the hysteresis comparison module 120 includes a first hysteresis comparison circuit 121 and a second hysteresis comparison circuit 122. In a specific embodiment, the hysteresis comparison module 120 can be configured with multiple hysteresis comparison circuits to implement multi-channel hardware judgment. In this embodiment, the hysteresis comparison module 120 is configured with two hysteresis comparison circuits to match the double fuses in most heating components 210. It should be noted that the number of hysteresis comparison circuits in the hysteresis comparison module 120 can be set to two or more according to the needs of the actual application scenario, and is determined according to the number of fuses in the heating component 210.

[0075] An input end of the first hysteresis comparison circuit 121 is connected to a first output end of the temperature acquisition module 110 , a first output end of the first hysteresis comparison circuit 121 is connected to the control module 130 , and a second output end of the first hysteresis comparison circuit 121 is connected to the driving switch module 140 ;

[0076] An input end of the second hysteresis comparison circuit 122 is connected to a second output end of the temperature acquisition module 110 , a first output end of the second hysteresis comparison circuit 122 is connected to the control module 130 , and a second output end of the second hysteresis comparison circuit 122 is connected to the driving switch module 140 .

[0077] Specifically, the circuit connection structures in the first hysteresis comparison circuit 121 and the second hysteresis comparison circuit 122 are the same, but the values ​​of specific circuit elements can be adaptively configured according to actual application scenarios to match different control judgment requirements.

[0078] In a specific embodiment, the input end of the first hysteresis comparison circuit 121 is used to receive the temperature feedback signal TEMP-NTC1 collected by the temperature acquisition module 110, and the first hysteresis comparison circuit 121 pre-processes the temperature feedback signal TEMP-NTC1 to obtain the first output signal ADC-TEMP-NTC1 and the second output signal COM-TEMP-NTC1.

[0079] The first output terminal of the first hysteresis comparison circuit 121 is used to output the first output signal ADC-TEMP-NTC1, and the second output terminal of the first hysteresis comparison circuit 121 is used to output the second output signal COM-TEMP-NTC1.

[0080] The input end of the second hysteresis comparison circuit 122 is used to receive the temperature feedback signal TEMP-NTC2 collected by the temperature collection module 110. The second hysteresis comparison circuit 122 pre-processes the temperature feedback signal TEMP-NTC2 to obtain the third output signal ADC-TEMP-NTC2 and the fourth output signal COM-TEMP-NTC2.

[0081] The first output terminal of the second hysteresis comparison circuit 122 is used to output the third output signal ADC-TEMP-NTC2, and the second output terminal of the second hysteresis comparison circuit 122 is used to output the fourth output signal COM-TEMP-NTC2.

[0082] It should be noted that when the hysteresis comparison module 120 is provided with multiple hysteresis comparison circuits, the structure and connection relationship of each hysteresis comparison circuit can refer to the circuit structure and connection relationship of the first hysteresis comparison circuit 121 and the second hysteresis comparison circuit 122. By providing multiple hysteresis comparison circuits, this embodiment can add multiple protections to the infusion pump heating component 210 to avoid failure of the infusion pump heating protection system due to failure of some hardware or software.

[0083] In one embodiment, if Figure 4 As shown, the first hysteresis comparison circuit 121 includes a first voltage following unit and a first comparison unit, and the second hysteresis comparison circuit 122 includes a second voltage following unit and a second comparison unit;

[0084] The first output end of the first voltage follower unit is connected to the control module 130, the second output end of the first voltage follower unit is connected to the first input end of the first comparison unit, the second input end of the first comparison unit is used to access the reference voltage signal, and the output end of the first comparison unit is connected to the driving switch module 140;

[0085] Specifically, Figure 4As shown, the first voltage follower unit includes an operational amplifier U22A, wherein the first input end of the operational amplifier U22A, that is, the first input end of the first voltage follower unit is connected to the temperature acquisition module 110, and is used to receive the temperature feedback signal TEMP-NTC1 sent by the temperature acquisition module 110. The second input end of the operational amplifier U22A is grounded through a resistor R260. In actual application, the first input end of the operational amplifier U22A is also grounded through a capacitor C207, and the capacitor C207 can be used to filter the temperature feedback signal TEMP-NTC1. The second input end of the operational amplifier U22A is also connected to the output end of the operational amplifier U22A through a voltage-dividing resistor R255, and the output end of the operational amplifier U22A is connected to the control module 130 through a first output resistor R261. The output end of the operational amplifier U22A is connected to the first input end of the first comparison unit through a second output resistor R265.

[0086] The first output end of the second voltage follower unit is connected to the control module 130 , the second output end of the second voltage follower unit is connected to the first input end of the second comparison unit, the second input end of the second comparison unit is used to access the reference voltage signal, and the output end of the second comparison unit is connected to the driving switch module 140 .

[0087] Specifically, Figure 4 As shown, the second voltage follower unit includes an operational amplifier U22B, wherein the first input end of the operational amplifier U22B, that is, the first input end of the first voltage follower unit is connected to the temperature acquisition module 110, and is used to receive the temperature feedback signal TEMP-NTC2 sent by the temperature acquisition module 110. The second input end of the operational amplifier U22B is grounded through a resistor R271. In actual application, the first input end of the operational amplifier U22B is also grounded through a capacitor C212, and the capacitor C212 can be used to filter the temperature feedback signal TEMP-NTC2. The second input end of the operational amplifier U22B is also connected to the output end of the operational amplifier U22B through a voltage divider resistor R276. The output end of the operational amplifier U22B is also connected to the control module 130 through a third output resistor R269. The output end of the operational amplifier U22B is connected to the first input end of the second comparison unit through a fourth output resistor R266.

[0088] Specifically, the specific voltage value of the reference voltage signal can be determined according to the voltage threshold corresponding to the high temperature threshold and the voltage threshold corresponding to the low temperature threshold that need to be configured in the actual application scenario, and this embodiment does not limit this.

[0089] Specifically, the values ​​of the circuit elements of the first hysteresis comparison circuit 121 and the circuit elements of the second hysteresis comparison circuit 122 may be completely the same or different, and are adaptively configured according to actual application scenarios.

[0090] It should be noted that when the circuit elements of the first hysteresis comparison circuit 121 and the circuit elements of the second hysteresis comparison circuit 122 are different, the two hysteresis comparison circuits can identify and judge the temperature feedback signal according to the voltage thresholds corresponding to different temperature thresholds, thereby achieving more flexible abnormal temperature processing of the infusion pump. For example, it can be determined which hysteresis comparison circuit outputs the switching signal based on the specific temperature value when the infusion pump temperature is abnormal. If the hysteresis comparison circuit with a higher temperature threshold outputs a switching signal, it can be determined that the hysteresis comparison circuit with a lower temperature threshold may have a fault. Based on the above settings, the user can more conveniently repair the infusion pump heating protection system.

[0091] In one embodiment, if Figure 3 As shown, the hysteresis comparison module 120 also includes an AND gate circuit 123;

[0092] The second output terminal of the first hysteresis comparison circuit 121 and the second output terminal of the second hysteresis comparison circuit 122 are both connected to the driving switch module 140 through the AND gate circuit 123 .

[0093] Specifically, this embodiment realizes simultaneous monitoring of multiple hysteresis comparison circuits by setting an AND gate circuit 123 in the hysteresis comparison module 120. When only one hysteresis comparison circuit outputs a high-low level conversion signal, the driving circuit 220 of the heating component 210 is turned off by driving the switch module 140.

[0094] In one embodiment, if Figure 4 As shown, the first comparison unit includes a first hysteresis comparator, a first reference voltage circuit and a first output circuit;

[0095] A first input terminal of the first hysteresis comparator is connected to the second output terminal of the first voltage follower unit, and a second input terminal of the first hysteresis comparator is connected to the first reference voltage circuit;

[0096] The output terminal of the first hysteresis comparator is connected to the driving switch module 140 through the first output circuit.

[0097] Specifically, Figure 4 As shown, the first hysteresis comparator includes an operational amplifier U23B, a voltage divider resistor R256 and an output resistor R264. The first reference voltage circuit includes a 3.3V power supply circuit, a voltage divider resistor R258 and a voltage divider resistor R259. The first output circuit includes a 3.3V power supply circuit and a voltage divider resistor R257.

[0098] In a specific embodiment, the first hysteresis comparator outputs the first switch signal HEAT-STOP1 through the first output circuit, so as to make the driving switch module 140 switch on and off.

[0099] In one embodiment, the second comparison unit includes a second hysteresis comparator, a second reference voltage circuit and a second output circuit;

[0100] A first input terminal of the second hysteresis comparator is connected to the second output terminal of the second voltage follower unit, and a second input terminal of the second hysteresis comparator is connected to the second reference voltage circuit;

[0101] The output terminal of the second hysteresis comparator is connected to the driving switch module 140 through the second output circuit.

[0102] Specifically, Figure 4 As shown, the second hysteresis comparator includes an operational amplifier U23A, a voltage divider resistor R275 and an output resistor R268. The second reference voltage circuit includes a 3.3V power supply circuit, a voltage divider resistor R273 and a voltage divider resistor R274. The second output circuit includes a 3.3V power supply circuit and a voltage divider resistor R272.

[0103] In a specific embodiment, the second hysteresis comparator outputs the second switch signal HEAT-STOP2 through the second output circuit to drive the switch module 140 to switch on and off.

[0104] In a specific embodiment, the input end of the AND gate circuit U24 is connected to the output end of the first hysteresis comparator and the output end of the second hysteresis comparator respectively, for receiving the first switch signal HEAT-STOP1 or the second switch signal HEAT-STOP2. The output end of the AND gate circuit U24 is connected to the driving switch module 140 to output the switch signal HEAT-STOP.

[0105] In one embodiment, the driving switch module 140 includes a first switch unit, a second switch unit, a third switch unit and a fourth switch unit;

[0106] The first switch unit and the second switch unit are respectively arranged on the driving circuit 220 of the heating component 210. When the first switch unit or the second switch unit is turned off, the driving circuit 220 is turned off; when the first switch unit and the second switch unit are turned on, the driving circuit 220 is turned on;

[0107] The control end of the first switch unit is grounded through the third switch unit, and the control end of the second switch unit is grounded through the fourth switch unit; the control end of the third switch unit is connected to the second output end of the hysteresis comparison module 120; and the control end of the fourth switch unit is connected to the control module 130.

[0108] Specifically, one end of the driving circuit 220 is connected to the driving power supply, and the other end is connected to the heating component 210. After the first switch unit and the second switch unit are set on the driving circuit 220, the driving power supply is connected to the heating component 210 through the second switch unit and the first switch unit in sequence.

[0109] In a specific embodiment, when the temperature represented by the temperature feedback signal exceeds the high temperature threshold, when the hysteresis comparison module 120 outputs a high-level signal that changes to a low-level signal, the on-off change of the third switch unit causes the first switch unit to change from an on state to an off state, thereby disconnecting the driving circuit 220 of the heating component 210 and causing the heating component 210 to stop working.

[0110] When the temperature represented by the temperature feedback signal exceeds the high temperature threshold, the control module 130 can also output a pulse width modulation signal HEAT-PWM-OUT, and control the on-off change of the fourth switch unit to change the second switch unit from the on state to the off state, thereby disconnecting the drive circuit 220 of the heating component 210 and stopping the heating component 210 from working.

[0111] In one embodiment, if Figure 5 As shown, the first switch unit includes a first transistor, the second switch unit includes a second transistor, the third switch unit includes a third transistor, and the fourth switch unit includes a fourth transistor;

[0112] The input end of the first transistor is connected to the output end of the second transistor, the input end of the second transistor is used to receive the driving electrical signal, and the output end of the first transistor is connected to the heating component 210;

[0113] The control end of the first transistor is connected to the output end of the third transistor, the control end of the second transistor is connected to the output end of the fourth transistor, and the input end of the third transistor and the input end of the fourth transistor are grounded;

[0114] The control end of the third transistor is connected to the output end of the hysteresis comparison module 120 , and the control end of the fourth transistor is connected to the control module 130 .

[0115] Specifically, Figure 5 As shown, the first transistor is transistor Q26, the second transistor is Q27, the third transistor is transistor Q29, and the fourth transistor is transistor Q28. It should be noted that the first switch unit also includes capacitor C217 and resistor R277, the second switch unit also includes resistor R278 and resistor R281, the third switch unit also includes resistor R284 and resistor R287, and the fourth switch unit also includes resistor R286 and resistor R285.

[0116] It should be noted that the transistor can be a MOS tube or a triode. The type of transistor can be determined according to the needs of the actual application scenario. The specific circuit structure of each switch unit can also be configured according to the needs of the actual application scenario. This embodiment does not limit the specific circuit structure of the switch unit.

[0117] In summary, the embodiments of the present application provide an infusion pump heating protection system, which can adjust and monitor the temperature of the heating component of the infusion pump based on the software logic in the control module and the hysteresis comparison module combined with the hardware circuit structure of the driving switch module. When the heating temperature of the infusion pump heating component is abnormal, it responds through multiple protection measures, thereby effectively improving the heating stability and safety of the infusion pump heating component.

[0118] In addition, this embodiment also provides an infusion pump heating protection device, including the infusion pump heating protection system in the aforementioned system embodiment.

[0119] This embodiment also provides an infusion pump device, including the infusion pump heating protection device in the aforementioned device embodiment.

[0120] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic description of the above terms does not necessarily refer to the same embodiment or example.

[0121] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0122] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A heating protection system for an infusion pump, characterized in that: include: A temperature acquisition module, the temperature acquisition module is connected to the heating component in the infusion pump and is used to collect a temperature feedback signal of the heating component; A hysteresis comparison module, wherein the hysteresis comparison module is connected to the output end of the temperature acquisition module; A control module, the control module is connected to the first output end of the hysteresis comparison module and the temperature acquisition module, and the control module is used to output a pulse width modulation signal to the heating component according to the first output signal of the hysteresis comparison module; A driving switch module, which is disposed on the driving circuit of the heating component and is also connected to the second output terminal of the hysteresis comparison module, and is used to control the on-off of the driving circuit according to the second output signal of the hysteresis comparison module; The hysteresis comparison module includes a first hysteresis comparison circuit and a second hysteresis comparison circuit; The input end of the first hysteresis comparison circuit is connected to the first output end of the temperature acquisition module, the first output end of the first hysteresis comparison circuit is connected to the control module, and the second output end of the first hysteresis comparison circuit is connected to the driving switch module; The input end of the second hysteresis comparison circuit is connected to the second output end of the temperature acquisition module, the first output end of the second hysteresis comparison circuit is connected to the control module, and the second output end of the second hysteresis comparison circuit is connected to the driving switch module.

2. The system according to claim 1, characterized in that The first hysteresis comparison circuit includes a first voltage following unit and a first comparison unit, and the second hysteresis comparison circuit includes a second voltage following unit and a second comparison unit; The first output end of the first voltage follower unit is connected to the control module, the second output end of the first voltage follower unit is connected to the first input end of the first comparison unit, the second input end of the first comparison unit is used to access the reference voltage signal, and the output end of the first comparison unit is connected to the driving switch module; The first output end of the second voltage follower unit is connected to the control module, the second output end of the second voltage follower unit is connected to the first input end of the second comparison unit, the second input end of the second comparison unit is used to access the reference voltage signal, and the output end of the second comparison unit is connected to the driving switch module.

3. The system according to claim 1, characterized in that The hysteresis comparison module also includes an AND gate circuit; The second output end of the first hysteresis comparison circuit and the second output end of the second hysteresis comparison circuit are both connected to the driving switch module through the AND gate circuit.

4. The system according to claim 2, characterized in that The first comparison unit includes a first hysteresis comparator, a first reference voltage circuit and a first output circuit; A first input terminal of the first hysteresis comparator is connected to a second output terminal of the first voltage follower unit, and a second input terminal of the first hysteresis comparator is connected to the first reference voltage circuit; The output end of the first hysteresis comparator is connected to the driving switch module through the first output circuit.

5. The system according to claim 2, characterized in that The second comparison unit includes a second hysteresis comparator, a second reference voltage circuit and a second output circuit; A first input terminal of the second hysteresis comparator is connected to a second output terminal of the second voltage follower unit, and a second input terminal of the second hysteresis comparator is connected to the second reference voltage circuit; The output end of the second hysteresis comparator is connected to the driving switch module through the second output circuit.

6. The system according to claim 2, characterized in that The driving switch module includes a first switch unit, a second switch unit, a third switch unit and a fourth switch unit; The first switch unit and the second switch unit are respectively arranged on the driving circuit of the heating component, and when the first switch unit or the second switch unit is turned off, the driving circuit is turned off; When the first switch unit and the second switch unit are turned on, the drive circuit is turned on; The control end of the first switch unit is grounded through the third switch unit, and the control end of the second switch unit is grounded through the fourth switch unit; the control end of the third switch unit is connected to the second output end of the hysteresis comparison module; and the control end of the fourth switch unit is connected to the control module.

7. The system according to claim 6, characterized in that The first switch unit includes a first transistor, the second switch unit includes a second transistor, the third switch unit includes a third transistor, and the fourth switch unit includes a fourth transistor; The input end of the first transistor is connected to the output end of the second transistor, the input end of the second transistor is used to receive a driving electrical signal, and the output end of the first transistor is connected to the heating component; The control end of the first transistor is connected to the output end of the third transistor, the control end of the second transistor is connected to the output end of the fourth transistor, and the input end of the third transistor and the input end of the fourth transistor are grounded; The control end of the third transistor is connected to the output end of the hysteresis comparison module, and the control end of the fourth transistor is connected to the control module.

8. A heating protection device for an infusion pump, characterized in that: A heating protection system for an infusion pump comprising the one of claims 1-7.

9. An infusion pump device, characterized in that: Comprising the infusion pump heating protection device according to claim 8.

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