CN201179253Y - Perfusion heater - Google Patents

Abstract

The perfusion device heating device is characterized in that: it includes a heating film that can be wound on the outer wall of the perfusion device; a control unit is connected to the heating film through a heating execution unit; a temperature sensor is connected between the control unit and the heating film; The protection unit to which the execution unit is connected. The perfusion device heating device in the utility model can heat the blood perfusion device at a constant temperature, thereby heating the blood in the perfusion device at a constant temperature, and effectively preventing the blood from coagulating in the perfusion device.

Description

Perfusion heater

technical field

The utility model relates to an auxiliary device of a medical device, in particular to a perfusion device heating device for heating the perfusion device.

Background technique

The perfusion device is a commonly used medical device for hemoperfusion therapy. Hemoperfusion requires proper heating of the blood when the environment is low temperature. At present, the method of indirect heating of the extracorporeal circulation circuit is used, and the length of the extracorporeal circulation circuit is limited, resulting in poor heating effect, and it is not appropriate to extend the length of extracorporeal circulation tubing to ensure the ideal heating effect. When the perfusion device is used in a cold environment, it is difficult to reach the blood temperature to meet the requirements of human body temperature, and blood coagulation is prone to occur. In addition, during hemoperfusion treatment, the drop in blood temperature mainly occurs at the perfusion device. In actual use, many medical institutions use hot water to soak the pipeline or heat the perfusion device to increase the blood temperature, but the constant temperature cannot be guaranteed. Operation is also inconvenient.

Contents of the invention

The main purpose of the utility model is to provide a device capable of constant temperature heating of the hemoperfusion device.

In order to achieve the above object, the utility model proposes a perfusion device heating device, which includes a heating film that can be wound on the outer wall of the perfusion device, and a control unit that is connected to the heating film through a heating execution unit and connected to the The temperature sensor between the control unit and the heating film, and the protection unit connected with the heating execution unit.

It can be seen from the above scheme that the perfusion device heating device in the utility model can heat the hemoperfusion device at a constant temperature, thereby heating the blood in the perfusion device at a constant temperature, effectively preventing the blood from coagulating in the perfusion device.

Description of drawings

Fig. 1 is the electrical control principle block diagram of the utility model embodiment;

Fig. 2 is the circuit diagram of the electrical control part of the utility model embodiment;

Fig. 3 is a structural schematic diagram of an embodiment of the utility model.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Detailed ways

Referring to FIG. 1 , the heater heating device includes a heating film 2 , a control unit 30 , a heating execution unit 50 , a temperature sensor 20 , a protection unit 40 and a display unit 70 connected to the control unit 30 . Wherein the control unit 30 controls the heating unit 50 to control the energization time on the heating film 2 , thereby changing the temperature of the heating film 2 . When the heating is started, the heating film 2 heats the perfusion device, and the temperature sensor 20 collects the temperature data at the heating film in real time, and sends it back to the control unit 30 for data calculation processing. After calculation, the real-time temperature value is obtained and output to the display unit for further processing. display, and at the same time, the control unit 30 obtains the current output control amount through fuzzy calculation according to the error between the last collected real-time temperature value and the temperature threshold set according to medical requirements and the last output control amount. The output control quantity controls the energization time of the heating film 2 through the heating execution unit 50, thereby changing the temperature on the heating film and achieving the purpose of constant temperature control.

When the temperature sensor 20 or the heating execution unit 50 fails unexpectedly, for example, when the temperature on the heating film 2 exceeds the set temperature + 1°C, the protection unit 40 detects that the temperature of the heating film 2 is abnormal, and automatically cuts off the heating power to ensure the safety of the system .

Referring to Fig. 2, the heating film 2, the temperature sensor 20, the control unit 30, the LCD display module 7, the heating execution unit 50 and the protection unit 40 form an embodiment. In this embodiment, the control unit adopts a microcontroller 31, and the display unit is an LCD The display 7 and the heating execution unit 50 are composed of a solid state relay 51 and its peripheral circuit. The heating execution unit 50 controls the power-on time of the heating film 2 according to the output of the microcontroller 31, thereby changing the temperature of the heating film 2 . The protection unit 40 includes a DC relay 41, a temperature switch and an alarm circuit. The DC relay 41 can cut off the power supply of the heating execution unit 50 under the control of the temperature switch. The temperature switch adopts a magnetic sensitive temperature switch 42. The alarm circuit mainly consists of a buzzer Device 43 and a light-emitting diode 44 constitute, magnetic sensitive temperature switch 42 is connected with alarm circuit, magnetic sensitive temperature switch 42 can detect the temperature of heating film.

When using the perfusion device heating device, the temperature threshold is set by the temperature adjustment button 9, and the heating film 2 starts to heat the perfusion device 1. When the temperature of the heating film rises to the temperature threshold, the heating film 2 is in the aforementioned heat preservation state, and the temperature is not maintained. Change. If an accident occurs, when the temperature of the heating film 2 rises beyond the set temperature + 1°C, it will reach the action point of the magnetic temperature switch 42, and the magnetic temperature switch 42 will cause the DC relay 41 to cut off the AC power supply. At the same time, the alarm circuit will The buzzer 43 and light-emitting diode 44 send sound and light alarm signal, remind the user to pay attention. The DC relay 41 and the magnetic-sensitive temperature switch 42 in the protection unit 40 constitute double protection for the heating system.

Referring to FIG. 3 , in FIG. 3 , the heating film 2 is used to wrap on the outer wall of the cartridge 1 . The control box 3 is connected with the power supply through the power line 4, and is connected with the heating film 2 and the temperature sensor arranged on the heating film 2 through the data connection line 5. The control box 3 has a control panel 6, and the control panel 6 is provided with an LCD display 7. Start button 8, temperature adjustment button 9, red light-emitting diode 44 and green indicator light 11 for heating status.

When in use, wrap the heating film 2 on the outer wall of the perfusion device 1, connect the plug of the power cord 4 to 220V voltage, press the temperature adjustment button 9 to set the heating temperature, and the temperature adjustment range is 30-37°C, and press the start button 8 , the heating state green indicator light 11 lights up, and the heating film 2 starts to heat. When the temperature rises to the set temperature, the heating membrane 2 is in a heat preservation state, and the blood in the perfusion device is maintained at the temperature threshold to preheat for a period of time. When the blood in the perfusion device gradually rises to the temperature threshold, it can start Perform hemoperfusion therapy. Once an accident occurs and the displayed temperature exceeds the set temperature by +1°C, a heating over-temperature alarm will be triggered, the red LED 44 will light up, and at the same time, the heating device of the perfusion device will automatically cut off the heating power to ensure system safety.

Compared with the perfusion device heating device in the prior art, the utility model can heat the perfusion device at a constant temperature to ensure the smooth progress of blood perfusion in a cold environment, prevent blood coagulation and shivering, and make the heating temperature exceed the set temperature in the event of an accident. When the value is set, the heating power supply is automatically cut off, and the user is reminded at the same time. It has the advantages of convenient operation, simple structure, safety and reliability.

Of course, the above-mentioned embodiment is only one embodiment of the utility model, and there may be more changes in the actual use of the utility model. For example, the heating execution unit 50 uses a thyristor to replace the action of the solid state relay 51, or the display unit 70 uses an LED display, etc. These changes do not affect the implementation of the present invention.

The utility model is not limited to the above-mentioned embodiments, without departing from the main scope and concept of the utility model, there can be various other deformations, changes and replacements all included in the scope of the claims.

Claims (7)

1, perfusion device heater is characterized in that:

Comprise

Can be wrapped in the heating film on the perfusion device outer wall;

Control unit, it is connected with heating film by a heating performance element;

Be connected the temperature sensor between control unit and the heating film;

The protected location that is connected with the heating performance element.

2, perfusion device heater according to claim 1 is characterized in that:

Described heating performance element is solid-state relay or IGCT.

3, perfusion device heater according to claim 1 and 2 is characterized in that:

Described protected location comprises interconnective temperature switch and DC relay, and the described DC relay of described temperature switch may command cuts off the power supply of heating performance element.

4, perfusion device heater according to claim 3 is characterized in that:

Described protected location also comprises the warning circuit that is connected with described temperature switch.

5, perfusion device heater according to claim 4 is characterized in that:

Described warning circuit comprises a kind of in audible alarm circuit or the luminous warning circuit at least.

6, perfusion device heater according to claim 1 and 2 is characterized in that:

Described perfusion device heater also is provided with the display unit that is connected with control unit.

7, perfusion device heater according to claim 6 is characterized in that:

Described display unit is LCD display or light-emitting diode display.

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