CN2171366Y

CN2171366Y - Heating insulating apparatus for fluid infusion

Info

Publication number: CN2171366Y
Application number: CN 93225893
Authority: CN
Inventors: 张裕良
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-19
Filing date: 1993-06-19
Publication date: 1994-07-13
Anticipated expiration: 2003-06-19

Abstract

The utility model relates to a heating thermal insulation device which is a heating thermal insulation device used for vein infusion. The utility model is composed of a control box (a control circuit board) and a heating thermal insulation rod. An automatic setting circuit for temperature, a control circuit and a protection circuit are arranged on the control circuit board. A heating resistor and a sensor are arranged in the concave-downward slot of a heating shell. When the heating thermal insulation device is used, an infusion pipe is arranged between concave-upward slots of the shell of a heating rod, and the heating resistor is heated by the control circuit to heat flowing fluid passing through the shell of the heating rod. In order to reinforce heating effects, the heating rod can also be provided with a heat-insulating layer outside. The utility model has the advantages of reasonable design, reliable heating, control and circuit protection properties, convenient operation and use, low cost, convenient manufacture, etc.

Description

Heating insulating apparatus for fluid infusion

This utility model relates to a kind of medical apparatus and instruments, and is especially a kind of to the venous transfusion heating warmer.

At present, in medical industry, generally usually need carry out venous transfusion to patient because of treatment, no matter be for a long time in the spring, summer, autumn and winter, all adopt and directly the medicinal liquid under this temperature is being infused to patient under any temperature, usually find in the environment of low temperature, venous transfusion can make patient's fluid injection position body temperature significantly descend, cause the vasoconstriction limbs pain, particularly make some elderly patients' vein blood vessel is easier and break, therefore weak patient increases the weight of the state of an illness, and this problem is hospital's urgent problem always.

The purpose of this utility model is to provide a kind of venous transfusion heating warmer that improves the transfusion temperature, reaches 25 ± 4 ℃ of scopes (1-20 ℃ of environment for use temperature, medicine liquid droplet speed 25-65 drips/minute) in the time of can making medicinal liquid enter human body.

The technical solution of the utility model is: design a temperature control box control circuit board and heat tracing rod; on control circuit board; be provided with conventional power circuit; make alternating current power supply and dc source satisfy the needs that use; also be provided with control circuit and holding circuit simultaneously in the circuit board; the input of comparison amplifier Ic2 in control circuit is connected to a temperature auto-set circuit; this auto-set circuit is by resistance R 37; R36; R39; R40 pick off T2 and comparison amplifier Ic14 form; in control circuit, also be provided with heating resistor Rfz; RfZ is connected between the negative electrode and ac power input end of controllable silicon SCR, and the controllable silicon SCR negative electrode meets the normally-closed contact J1-1 of a relay J 1.Establish an axial pass trough on heat tracing rod the shell for the cuboid made with heat-transfer matcrial, be provided with in the bottom of cuboid one with the corresponding low groove in groove position, heating resistor Rft and pick off T1 arranged in that low groove is mid-, base plate places under the low groove, and is screwed on the cuboid shell.During use with this utility model energized, finish transfusion operation routinely, after regulating medicine liquid droplet speed, the transfusion plastic tube is embedded the heating temperature near one section at patient's syringe needle to be protected in the upper groove of excellent shell, in order to strengthen the heat tracing effect, reduce energy consumption and can outside the heat tracing rod, be nested with a muff, open the control box on and off switch this moment, pick off T1 obtains the temperature value in the heat tracing rod, with the relatively back make-and-break time ratio of controlling the controllable silicon SCR switch of the automatic setting temperature value of auto-set circuit output, promptly regulate the average heating power of heating resistor RfZ, thereby form a closed loop control, temperature in the insulation rod is controlled between the suitable value, makes by the transfusion temperature scope of meeting the requirements of of heat tracing rod and import the patient.

The utlity model has reasonable in design, control circuit, auto-set circuit, holding circuit, dependable performances such as power circuit, advantage such as easy to use.

Fig. 1 is overall structure figure of the present utility model;

Fig. 2 is a circuit block diagram of the present utility model

Fig. 3 is a circuit diagram of the present utility model

Fig. 4 is heat tracing bar structure figure of the present utility model

Discuss most preferred embodiment of the present utility model below in conjunction with accompanying drawing: as shown in the figure

The venous transfusion heating warmer is made up of control box (1), control circuit board (2) heat tracing rod (3).Auto-set circuit on control circuit board (2), supply with IC14 input anode by R36, R37 dividing potential drop, V+ provides a constant current to pick off T2 by R38 dc reference power supply, T2 is connected across between IC14 input negative terminal and the outfan, R39, R40 are transported to R6 with the output dividing potential drop of IC14, and this voltage changes with the ambient temperature that T2 perceives.Heating resistor Rfz is serially connected with between the anode and ac power input end of controllable silicon SCR in control circuit, and the controllable silicon SCR negative electrode is connected to the normally-closed contact J1-1 of a relay J 1;

The control of relay J 1 protected circuit.Heating resistor Rfz is the coil of two groups of heater strip coilings, and it is placed in the low groove of heat bar shell (3), also is provided with temperature sensor T1 in low groove (4).Heat bar shell (3) is the cuboid that a usefulness hot material is made, axially establish a groove (6) at this cuboid, in the bottom of cuboid under groove (6) limit this low groove (4) of left and right sealing is arranged, base plate (7) is placed on the surface of low groove (4), and is screwed on heat bar shell (3).Can outside heat bar shell (3), be nested with a muff (8) in addition, improve heats, reduce energy consumption.

Claims

1, a kind of venous transfusion heating warmer is made up of control box (1), control circuit line plate (2) heat tracing rod (3).On control apparatus line plate (2), be provided with temperature-control circuit, holding circuit, filter circuit of pressure-stabilizing etc., it is characterized in that:

A, on control circuit board (2), before the positive input series resistor R6 of comparison amplifier Ic2, connect a temperature auto-set circuit.

B, heating resistor RfZ goes here and there between the base stage and ac power input end of controllable silicon SCR in control circuit, and the controllable silicon SCR negative electrode has the normally-closed contact J1-1 of a relay J 1; Relay J 1, protected circuit control.

C, heating resistor RfZ are the coils of two groups of heater strip coilings, it is placed in the low groove (4) of heat bar shell (3), in low groove (4), also be provided with temperature sensor T1, pick off T1 is connected to the emitter stage of audion BG1, heat bar shell (3) is the cuboid that a usefulness heat-transfer matcrial is made, axially establish a groove (6) at this cuboid, also this has the low groove (4) of a left and right sealing under groove (6) in the bottom of cuboid, base plate (7) is placed on the surface of low groove (4), and is screwed on the heat bar shell (3).

2, this venous transfusion heating warmer according to claim 1, it is characterized in that auto-set circuit is by R36, R37 dividing potential drop supply Ic14 input anode, V+ provides a constant current to pick off T2 by the R3 dc source, T2 is connected across between Ic14 input negative terminal and the outfan, R39, R40 are transported to R6 with the output dividing potential drop of Ic14, and this voltage changes with the ambient temperature that T2 perceives.

3, venous transfusion heating warmer according to claim 1 is characterized in that being nested with a heat-insulation layer (8) outside heat bar shell (3).