CN2925503Y - Heater of infusion bottle - Google Patents

Abstract

The utility model names hanging-bottle heater belonging to the technical field of medical facilities, in particular to a heater for transfusion, which prevents the discomfortness for patients during transfusion with the existing technology that directly injecting the liquid medicine into human body without considering the temperature difference between the liquid medicine and the human body especially in winter. The utility model is characterized in that: an electric bridged operational amplifier IC 1-a's feet 2 and 3 composed of a resistance R2, R3, a variable resistance and a thermistance and operational amplifier IC 1-a's feet 8 and 4 are connected with the anode and cathode of the power source respectively; A foot 1 is connected with a foot 5 of the operational amplifier IC 1-b whose foot 7 is connected with one amplifier; The amplifier is connected with a control grid G of a controlled silicon through a resistance R7, and the controlled silicon and a heating element are linked in series with two ends of the power source. The utility model, heating by resistance wire, has no side-effect on human body and can control the temperature in the designed range by using the thermistance as the thermal probe, thus can ensure the patient's safety when the temperature near to animal heat. In addition, the utility model can be used repeatedly, thus saves the material and is beneficial for environment.

Description

Transfusion bottle slight fever device

Technical field

This utility model belongs to the armarium technical field, specifically a kind of transfusion bottle heater of using to patient infusion.

Background technology

At present, hospital gives patient infusion, is directly liquid to be imported in the human body, and variant because of liquid and human body temperature, especially winter, because liquid cold, patient can feel muscular soreness on hand, and the someone adopts the hot-water bag heating, but its temperature is uncontrollable.Scald easily.

Summary of the invention

The purpose of this utility model provide a kind of can be with the little heating of transfusion liquid, may command it remain on closely with human body temperature, human body had no side effect reusable transfusion bottle slight fever device.

The technical solution of the utility model is: by resistance R ₂, R ₃The electric bridge of forming with variable resistance, critesistor meets operational amplifier lC ₁The foot 2,3 of-a constitutes temperature detection electric bridge comparator, operational amplifier lC ₁The foot 8,4 of-a meets the positive and negative electrode of temperature control circuit power supply, operational amplifier lC respectively ₁The foot 1 of-a meets operational amplifier lC ₁The foot 5 of-b, operational amplifier lC ₁The foot 6 of-b and foot 7 short circuits, foot 7 connects an amplifier, and amplifier passes through resistance R ₇Connect silicon controlled the control utmost point, controllable silicon and heater element series connection working power two ends.

Said variable-resistance slip knee-joint operational amplifier lC in the technical solutions of the utility model ₁The foot 2 of-a, resistance R ₃Meet operational amplifier lC with the node of critesistor ₁The foot 3 of-a.

Said amplifier is by audion VT in the technical solutions of the utility model ₁And VT ₂Form audion VT ₁The base stage resistance R of connecting ₄Meet operational amplifier lC ₁The foot 7 of-b, audion VT ₁Emitter stage by diode D ₁Connect the negative pole of power supply, collector connecting transistor VT ₂Base stage, audion VT ₂Emitter stage connect the positive pole of power supply, colelctor electrode is leaded up to resistance R ₈Connect the negative pole of power supply, lead up to resistance R ₇Connect the silicon controlled control utmost point G utmost point.

Said audion VT in the technical solutions of the utility model ₂Collector resistance R ₈On be parallel with heating relay indicating light LED ₂And resistance R ₅Series circuit.

Said temperature control circuit power supply is taken from 36v heating wire running voltage again by R in the technical solutions of the utility model ₆, D ₂Series connection, R ₆Blood pressure lowering, D ₂Rectification, DW, R ₁Parallel connection, DW voltage stabilizing, and C ₁Filter circuit

Said two ends at power supply are parallel with power supply indicator LED in the technical solutions of the utility model ₁And resistance R ₁Series circuit.

In the technical solutions of the utility model said heater element be fixed on have on the outer wall spiral fluted simplified on, an end closure, snap ring is equipped with at two ends, snap ring is contained on the draw-in groove on the cylindrical shell, has transfusion speed control dovetail groove on the snap ring.

This utility model is to adopt the resistance wire slight fever, do not contain chemical reagent, thus without any side effects to human body, adopt critesistor as thermosensitive probe, temperature can be controlled in the accurate scope, near body temperature, so can guarantee patient's safety, this utility model belongs to the repeated use device, but so economical with materials, environmental, from present practical situation, be the ideal product of hospital's transfusion usefulness.

Description of drawings

Fig. 1 is an electrical schematic diagram of the present utility model;

Fig. 2 is the cylindrical shell outline drawing of fixedly heater element;

Fig. 3 is the snap ring outline drawing of fixedly transfusion bottle flexible pipe.

The specific embodiment

As shown in Figure 1, overall work voltage adopts 36 volts alternating current power supply to heat to heating wire, and temperature control part power supply is taken from 36v voltage, through R ₆Blood pressure lowering, D ₂, rectification, D ₃Voltage stabilizing, C ₁Supply with temperature control circuit after the filtering, the two ends of power supply also are connected to resistance R ₁With power supply indicator LED ₁Series circuit, by resistance R ₂, R ₃, variable resistance RP and critesistor the RT electric bridge and the operational amplifier lC that form ₁-a constitutes temperature detection electric bridge comparator, resistance R ₂With variable resistance RP series connection, the slip knee-joint operational amplifier lC of variable resistance RP ₁The foot 2 of-a, resistance R ₃Meet operational amplifier lC with the node of critesistor RT ₁The foot 3 of-a, operational amplifier lC ₁The foot 8,4 of-a connects the temperature control circuit power supply and connects positive and negative electrode, by operational amplifier lC ₁The output of the temperature detection electric bridge comparator that-a and electric bridge are formed meets operational amplifier lC ₁-b, i.e. operational amplifier lC ₁The foot 1 of-a meets computing operational amplifier lC ₁The foot 5 of-b, operational amplifier lC ₁The foot 6 of-b and foot 7 short circuits, foot 7 connects an amplifier, and resistance R is passed through in the output of amplifier ₇Meet the control utmost point G of controllable silicon SCR, heater element R ₀With the two ends of controllable silicon SCR series connection working power, heater element R ₀It is a heating wire; Amplifier is by audion VT ₁And VT ₂Form audion VT ₁Base stage pass through resistance R ₄Meet operational amplifier lC ₁The foot 7 of-b, emitter stage is by diode D ₁Connect power cathode, collector connecting transistor VT ₂Base stage, audion VT ₂Emitter stage connect positive source, colelctor electrode is leaded up to resistance R ₈Connect power cathode, lead up to resistance R ₇Meet the control utmost point G of controllable silicon SCR, resistance R ₈And be connected with display lamp LED ₂And resistance R ₅Series circuit; Its operation principle is: according to critesistor RT is a negative temperature coefficient resister, and its resistance is the linear characteristic that descends with the rising of temperature, and the resistance of temperature-sensitive resistance R T becomes big when ambient temperature is lower than limiting temperature, operational amplifier lC ₁Foot 1 output of-a is high level, operational amplifier lC ₁Foot 7 outputs of-b also are high level, audion VT ₁And VT ₂The conducting controllable silicon SCR, heater element R ₀Get electrical heating, burner on light LED ₂Bright, temperature-sensitive resistance R T resistance descends when ambient temperature is higher than limiting temperature, operational amplifier lC ₁The foot 1 of-a and operational amplifier lC ₁Foot 7 outputs of-b are low level, audion VT ₁And VT ₂End burner on light LED ₂Extinguish, controllable silicon SCR is ended, heater element R ₀Stop heating.As Fig. 2, shown in Figure 3, heater element R ₀Be fixed in the cylindrical shell 10 that has helicla flute 9 on the outer wall, external asbestos parcel makes heater element R ₀The temperature that produces evenly is transmitted on the outer wall, tube for transfusion is walked around from the helicla flute 9 on the outer wall, liquid in the tube for transfusion is slowly heated, going into pipe and going out pipe clamp groove 12 of tube for transfusion left at simplified 10 two ends respectively, one end closure of cylindrical shell 10, an end opening is equipped with snap ring 11 on the two ends, snap ring 11 is contained on simplified 10 draw-in grooves 12, has the control dovetail groove 13 of flow rate of liquid in the control tube for transfusion on the snap ring 11.

Claims (7)

1, a kind of transfusion bottle slight fever device is characterized in that by resistance R ₂, R ₃, the electric bridge that variable resistance RP and critesistor RT form meets operational amplifier lC ₁The foot 2,3 of-a constitutes temperature detection electric bridge comparator, operational amplifier lC ₁The foot 8,4 of-a meets the positive and negative electrode of temperature control circuit power supply, operational amplifier lC respectively ₁The foot 1 of-a meets operational amplifier lC ₁The foot 5 of-b, operational amplifier lC ₁The foot 6 of-b and foot 7 short circuits, foot 7 connects an amplifier, and amplifier passes through resistance R ₇Meet the control utmost point G of controllable silicon SCR, controllable silicon SCR and heater element R ₀Series connection working power two ends.

2, transfusion bottle slight fever device according to claim 1 is characterized in that the slip knee-joint operational amplifier lC of said variable resistance RP ₁The foot 2 of-a, resistance R ₃Meet operational amplifier lC with the node of critesistor RT ₁The foot 3 of-a.

3, transfusion bottle slight fever device according to claim 1 is characterized in that said amplifier is by audion VT ₁And VT ₂Form audion VT ₁Base stage pass through resistance R ₄Meet fortune amplifier lC ₁The foot 7 of-b, audion VT ₁Emitter stage by diode D ₁Connect power cathode, collector connecting transistor VT ₂Base stage, audion VT ₂Emitter stage connect positive source, colelctor electrode is leaded up to resistance R ₈Connect power cathode, lead up to resistance R ₇Connect the control utmost point G utmost point of controllable silicon SCR.

4, according to claim 1 or 3 described transfusion bottle slight fever devices, it is characterized in that said resistance R ₈On be parallel with display lamp LED ₂And resistance R ₅Series circuit is as burner on light.

5, according to claim 1 or 3 described transfusion bottle slight fever devices, it is characterized in that the temperature control circuit power supply is by R ₆, D ₂The series connection again with DW, C ₁And be unified into power supply circuits.

6, transfusion bottle slight fever device according to claim 1 is characterized in that at the two ends of power supply and is connected to power supply indicator LED ₁And resistance R ₁Series circuit.

7, transfusion bottle slight fever device according to claim 1 is characterized in that said heater element R ₀Be fixed in the cylindrical shell (10) that has helicla flute (9) on the outer wall, cylindrical shell (10) one end closures are equipped with snap ring (11) on the two ends, and snap ring (11) is contained on the draw-in groove (12) on the cylindrical shell (10), have transfusion speed control dovetail groove (13) on the snap ring (11).

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