SU1736483A1 - Apparatus for local heat application - Google Patents

Abstract

The invention relates to medical technology, namely, devices for local thermal impact on the human body, and provides an increase in the effectiveness of a contrast effect by increasing the rate of temperature change, the safety of this effect and an increase in ease of operation. Thermoelectric modules are equipped with flat electric heaters, and temperature sensors are made in the form of heat meter tapes. 1 hp f-ly, 3 ill.

Description

The invention relates to medical technology, namely, devices for local thermal impact on the human body, and can be used to conduct controlled hypothermia of sufficiently large areas of the body with an uneven surface and to correct the functional state of the person.

A device for influencing biologically active points (BAT) is known, which contains a power source connected through a switching unit to electrical and temperature circuits.

The known device permits alternating effects on the BAT by electric current and heat, and electric current and cold, and is used to treat various diseases.

A disadvantage of the known device is the impossibility of separately adjusting the duration and intensity of exposure to each BAT, since

thermoelements are combined into one electrical circuit and have a common power supply. In addition, thermoelements have a significant inertia, which does not allow for effective contrasting effect.

A device for local thermal impact on a vehicle operator is known, comprising thermoelectric modules with temperature sensors mounted on an elastic base and connected via a control unit to a power source.

The known device allows for thermal, cold and contrast effects and is used to regulate the thermal and correct the functional state of a person.

A disadvantage of the known device is the low efficiency of the contrast effect due to the insufficient rate of temperature change due to

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inertia of thermoelectric modules, which reduces the contrast of objectively perceived thermopulsations and the intensity of stimulation of receptors that form the sensory (sensory) flow entering the central nervous system (CNS), and does not allow effective correction of the functional state of the human body.

The purpose of the invention is to increase the effectiveness of a contrast effect by increasing the rate of temperature change, ensuring the safety of the effect and improving the usability.

FIG. 1 shows a block diagram of the proposed device; in fig. 2 - thermoelectric modules located on an elastic basis; in fig. 3 - thermoelectric module, section.

The device contains a power source 1, a remote control 2 controls and a control unit 3, made in the form of series-connected switching unit 4, intensity adjustment unit 5, time setting unit 6 and exposure control unit 7, and connected by means of power lines 8 with stermoelectric modules 9. Thermoelectric modules 9 are fixed on an elastic base 10,

Thermoelectric module 9 contains a thermoelectric battery 11, the junctions 12 and 13 of which, via a heat transfer 14, are mated with an electric heater 15 and a liquid heat exchanger 16, the inner surface of which has a fins 15, respectively. Liquid heat exchanger 16 is designed to remove heat from the junctions 13 of the thermal battery 11 during operation cold exposure and connected via liquid pipelines to a water supply system (not shown). To ensure the safety of exposure, thermoelectric module 9 contains a temperature sensor 18, which is a battery of series-connected differential thermocouples 19, whose adjacent junctions are located on opposite sides of the thermogradient layer 20 (for example, plexiglas or rubberized nylon fabric with soot filler, etc.) . The temperature sensor 18 by means of heat transfer 14 is coupled to the electric heater 15.

The device works as follows.

Using pressure pads (not shown), the elastic base 10 (for example, rubber, cloth, etc.) with thermoelectric modules 9 is attached to the body. The device can operate in cold, thermal and contrasting modes. In order to effect a cold effect with the help of the remote control 2, a signal is sent to the switching unit 4, which connects the thermocouple 11 of all the thermal modules 9 to the power supply 1. In this case, a positive polarity current is supplied to the thermopile 11.

0 In order to effect thermal effects using the remote control 2, a signal is sent to the switching unit 4, which changes the polarity of the current supplied to the thermocouple 11 of all the thermal modules 9.

5Also, implementation is possible.

the following modes of contrasting effects: I - alternation of thermal and cold effects, II - alternation of thermal and cold effects against the background of constant thermal effects; III - alternation of thermal and cold effects on the background of a constant cold effect.

To carry out the alternation of thermal and cold effects using

5 of the control panel 2 controls the switching unit 4, which connects the thermocouples 11 and the electric heater 15 of all the thermal modules 9 to the power supply 1. Thermal batteries 11 are constantly supplied with a current of positive polarity and they effect a cold effect, and electric heaters 15 turn on periodically and effect a thermal effect.

5 To effect alternation of thermal and cold effects on the background of constant thermal effects using the remote control 2, the control unit sends a signal to the switching unit 4, which connects the thermocouple 11 of all thermal modules and the electric heater 15 of thermal module 9, located in the center of the zone of action, to the power source 1. At the same time on thermopile 11 thermomodules 9, located

5 around the perimeter of the zone of influence, a current of negative polarity is supplied and they carry out a thermal effect, and a thermoblock 11, a thermal module 9 located in the center of the zone of action, has a positive polarity and it carries out a cold effect. The electric heater 15 of the thermal module 9 located in the center of the zone of action is switched on periodically and carries out a thermal effect.

5 To effect alternation of thermal and cold effects on the background of constant cold effects from the remote control 2, a signal is sent to the switching unit 4, which connects the thermocouple 11 of all thermal modules 9 and the electric heater 15 of thermal module 9, located in the center of the zone of influence, to power supply 1. In this case, the thermopile 11 of all the thermal modules 9 is supplied with a positive polarity current and they carry out a cold effect. The electric heater 15 of the thermal module 9 located in the center of the zone of action is switched on periodically and carries out a thermal effect. The parameters of exposure during operation of the device in all modes are adjusted as follows: intensity - using the intensity adjustment unit 5 (determined by the current), duration — using the time setting unit. Temperature control of thermoelectric modules 9 is carried out automatically with the help of temperature sensors 18, issuing a signal to control unit 7, which acts on switching unit 4 and disconnects thermoelectric modules 9 from power supply 1.

The use of flat electric heaters (small mass and thickness, a large contact area with a thermoelectric battery) makes it possible to carry out a contrasting effect when thermometers work in the constant polarity mode of the supplied current, eliminate their inertia that arises when operating in the variable polarity mode, and achieve an increase the rate of change of temperature is 2 times, i.e. up to 3-4 ° C / s. At the same time, contrasting thermopulsation is achieved by periodically turning on the electric heaters, while the thermal cell x is constantly operating in the cold-action mode. By increasing the rate of change in the temperature of the thermal modules, the contrast of subjectively perceived thermal pulsations is enhanced, and the intensity of stimulation of the receptors forming the sensory flow to the central nervous system increases. This makes it possible to effectively correct the functional state of the human body.

The use of heat-measuring tapes as temperature sensors makes it possible to carry out a measured effect regardless of the temperature of the skin

a stimulus acts, a dosed effect is provided by automatically controlling the temperature of thermoelectric modules (a heat meter reacts to a certain heat flux,

proportional to the temperature difference). The sensor is adjusted to the heat flux value that corresponds to the minimum of all the heat fluxes on the surface of the human body. When changing the zone of influence (the part of the body surface to which it is directed), the heat flux between the human body and the thermoelectric module remains constant and, therefore, does not

exceeds the value of the allowable heat flux for a given surface area of the body, which ensures the safety of exposure. In addition, no additional configuration of the sensor is required and increases

convenience in operation.

Claims (2)

1. A device for local thermal exposure containing thermoelectric modules with temperature sensors fixed on an elastic base and connected via a control unit to a power source, characterized in that increasing the effectiveness of contrasting effects by increasing the rate of temperature change; thermoelectric modules are equipped with flat electric heaters connected via a control unit with a power source. 2. The device according to claim 1, characterized in that, in order to ensure the safety of the action and increase the convenience in operation, the temperature sensors are made in the form of heat meter tapes. Fj G, one "H I l4 C1 / Gchlch / GG "N Mv ..J nd ". N at LO LD (yig.z