RU4472U1 - DEVICE FOR EXPOSING COLD TO A BIOLOGICALLY ACTIVE POINT - Google Patents

Abstract

1. A device for exposing a biologically active point to cold containing a transparent container with a refrigerant, the transition temperature of which from solid to liquid is below 0 ° C, a heat pipe in thermal contact with the refrigerant, and a tip, characterized in that the heat pipe has thermal contact with the tip , while the composition of the refrigerant is determined by the temperature of the transition of the solid phase of the refrigerant into the liquid, and its volume is determined by the duration of this transition. 2. The device according to claim 1, characterized in that the outer surface of the container is provided with a transparent heat insulator. 3. The device according to PP. 1 and 2, characterized in that the transparent heat insulator is made multilayer. 4. The device according to PP. 1 and 2, characterized in that the transparent heat insulator is removable.

Description

DEVICE yes EXPOSURE to cold ON BIOLOGICALLY ACTIVE POINT

The utility model relates to medicine and more specifically to the field of temperature effects on biologically active points on the patient’s body while preserving cell viability with the aim of a preventive and (or) therapeutic effect.

Currently, local hypothermia is produced with the help of electric devices using thermal batteries.

 39/06

a term containing a thermopile, a power source and a current regulator, an air radiator for removing heat from the hot side of the thermopile, and a working plate (working fluid) through which the surface of the body is cooled. The main disadvantages of the device are the instability of the temperature on the cold side due to air cooling of the radiator, as well as the need for power and service devices for its operation. Electronic industry No. 8-9, 1979, N.I. Varich, G.I. Voitenko, A.S. Melnik, V.P. Yashchenko. Thermoelectric device for local hypothermia of the limbs.

A device for physiotherapy containing a thermally conductive contact element, a temperature sensor, a thermoelectric battery, to which a replaceable thermal accumulator containing a solid phase refrigerant is connected via a heat pipe is known.

The disadvantages of the device is that when changing the thermal accumulator, it is necessary to control the presence of thermal contact between the plane of the thermal accumulator and the hot side of the thermal battery. Another disadvantage of the device is the presence of a power source and thermal battery, which leads to an increase in the dimensions of the device. In addition, the device needs hardware control of the time of the therapeutic procedure, that is, the presence of a timer and a thermometer. Application No. 930525I3 / I4-053I37, IPC A6Sh39 / 06, priority dated November 17, 1993

The closest in technical essence to the proposed one is a semiconductor thermoelectric device containing a transparent container with refrigerant, the transition temperature of which from solid to liquid is equal to or lies below 0 ° C, a heat pipe in the form of a heat-conducting sleeve with fins and a thermoelectric battery whose hot side is adjacent to the heat-conducting sleeve, and cold to the working head with interchangeable nozzles, voltage switch and current source. The advantage of this device is the absence of the need to control the thermal contact between the refrigerant and

a mobile camp, since they are permanently connected through a heat-conducting sleeve, however, like the devices discussed above, they require a power source, as well as devices that control time and temperature.

This leads to a complication of service maintenance of the device and its high price (USSR copyright certificate No. 1801473 A6Sh 39/06).

The objective of the utility model is to simplify the device and reduce its price.

To solve the problem, a new device has been introduced into the device for cold exposure to a biologically active point containing a transparent container with refrigerant that is in thermal contact with the refrigerant, the heat sink and the tip, namely: the heat pipe has thermal contact with the tip, and the composition of the refrigerant is determined by the transition temperature of the refrigerant from solid to liquid, and its volume - the duration of this transition.

To stabilize the duration of the transition of the solid phase of the refrigerant to a liquid container, it can be equipped with a transparent heat insulator, which can be multilayer.

To accelerate bringing the refrigerant to working condition, i.e. refrigerant refrigerant, transparent heat insulator can be made removable.

The essence of the utility model is illustrated figl, which presents a General view of the device.

The device contains a transparent container I with a refrigerant 2 a transparent heat insulator in the form of 2 transparent casings, 3, 4 and a heat pipe 5 having thermal contact with a tip 6. The container I with a transparent wall of heat-insulating material contains a normalized volume of refrigerant 2 with a given phase transition temperature lying below 0 ° C. Between the casing 3, 4 and the container I there is an air gap. The container is fixed in the casing through.

Sators with high thermal resistance.

If it is required to strengthen the thermal insulation, the number of layers (casings) of the thermal insulator can be increased (in the considered example, EX 2). It is important that the heat insulator does not lose transparency.

A heat pipe 5 is pressed into the container, which passes through the wall of the container I, the casings 3, 4 and passes to the tip 6, which can be made integral with the heat pipe, as shown in FIG. 1, or have a removable structure, while maintaining thermal contact with the heat pipe.

In the considered example, a 22% solution of calcium chloride in water was selected as the refrigerant. This solution has a freezing point of 15 ° C and it is precisely this temperature at the tip that was required for the treatment procedure using the device in question.

It is known that the process of phase transition occurs at a constant temperature. Therefore, during the entire time the refrigerant melts, in our example, a solution of calcium chloride: of the indicated concentration, the tip temperature remained equal to approximately - 15 °.

The volume of the refrigerant is determined by the time interval during which it completely passes from the solid phase to the liquid phase (melts) due to its heating through the heat pipe from the cooled biologically active point and through thermal insulation from the environment.

For a given time interval, determined by the necessary duration of the procedure, experimentally, taking into account the specific design of the device, materials of the heat insulator and heat pipe and the composition of the refrigerant, select the amount of refrigerant in the container.

In this device, with a two-layer heat insulator and a container made of polyethylene, a copper heat pipe, a refrigerant in the form of a 22% solution of calcium chloride in water, the volume of the refrigerant is 2 cm. In this case, the temperature - 15 ° C is stored on the tip

15 minutes.

A wide range of substances can be used as refrigerants, the phase transition temperature of which lies below 0 ° C. (Handbook of the chemist LL964, Sh., P. 279).

For example, the table below shows the dependence of the phase transition temperature on the concentration of calcium chloride in water.

-concentration of anhydrous substance in grams per 100 g of water;

-freezing temperature in ° C.

Work with the device is carried out as follows: immediately before the procedure, the device is cooled, or, in the case of a removable heat insulator, the container until the refrigerant is completely frozen.

Freezing is carried out in the freezer of the refrigerator, a cooling mixture or in another way. It is convenient to cool a group of devices or containers selected for the procedure.

Then, immediately before work, the container or device is heated until the first signs of the transition of the refrigerant to the liquid phase appear. The appearance of the first drops of the liquid phase is fixed by the operator directly through the transparent walls.

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Table

Then a medical procedure is performed, i.e. The biologically active point is cooled with the tip of the heat conduit.

The moment of completion of the procedure is recorded by the operator for the complete transition of the refrigerant to the liquid phase.

At the end of the procedure, another unit from a pre-cooled group is used to cool the next point.

The presence of a group of devices allows you to vary the method of cooling points. Namely: to cool the points at the same time, with time shifts, with different exposure durations, as well as with different temperatures, using devices with different container volumes and with different coolants that differ in phase transition temperature.

The advantage of the proposed device is that, subject to operational requirements, it lacks expensive electrical equipment, time and temperature control and measuring devices. The advantages also include the simplicity of design and operation and its low price.

Claims (4)

1. A device for exposing a biologically active point to cold containing a transparent container with a refrigerant, the transition temperature of which from solid to liquid is below 0 ^° C, a heat pipe in thermal contact with the refrigerant, and a tip, characterized in that the heat pipe has a thermal contact from the tip, while the composition of the refrigerant is determined by the transition temperature of the solid phase of the refrigerant into the liquid, and its volume is determined by the duration of this transition.  2. The device according to p. 1, characterized in that the outer surface of the container is equipped with a transparent heat insulator.  3. The device according to paragraphs. 1 and 2, characterized in that the transparent heat insulator is made multilayer. 4. The device according to paragraphs. 1 and 2, characterized in that the transparent heat insulator is removable.