RU1806314C - Thermostat - Google Patents

Abstract

Use: for storage of biological objects, and specifically donor organs. SUBSTANCE: thermostat contains a thermally insulated body, a glass with a heat exchanger made of highly conductive material for the object to be cooled, placed in a coolant to form a cavity with a body in the form of a U-shaped rotation figure. The thermostat is equipped with a means for controlling freezing. The heat exchanger is made in the form of a ring and is placed in the upper part of the glass. The means for regulating freezing comprises an ice container placed in the upper part of the housing with the possibility of axial movement and contact with the heat-conducting ring in its lowermost position, a pusher with a gasket of thermal insulation material and a kinematically coupled bellows. In the lower part of the pusher, a recess is made with the possibility of placement in a glass with a cooled object. 1 ill. ./

Description

: The invention relates to devices for thermostating in a chilled state of objects, e.g. donor organs.

The purpose of the invention is to increase ease of use.

A thermostat is proposed comprising a thermally insulated body, a cup with a heat exchanger of highly conductive material for the object to be cooled, placed in a coolant with the formation of a cavity in the form of a U-shaped rotation figure in the housing, in which according to the invention a means for regulating freezing is contained, the heat exchanger is made rings and placed in the upper part of the glass, and the means for regulating freezing contains an ice vessel placed axially in the upper part of the body movement and contact with the heat-conducting ring in its lowest position, a pusher with a gasket of heat-insulating material and a bellows kinematically connected to the pusher located in the coolant jacket and secured in the lower part of the glass, and a recess is made in the lower part of the pusher for placement in glass with a cooled object.

The invention is illustrated in the drawing, which schematically shows a General view of the thermostat,

The thermostat contains a thermally insulated housing 1, a cup 2 with a heat exchanger 3 made of highly heat-conducting material for a cooled object, for example, a donor kidney, placed in a coolant

00

oh oh

Sd

Јь

 00

4 to form a cavity 5 with a body in the form of a rotation figure of a U-shaped cross section. As the refrigerant 4 used water. The thermostat is provided with means 6 for regulating the freezing of water 4, comprising an ice vessel 7 for being placed in the upper part of the housing 1 with the possibility of axial movement and contact with the heat exchanger 3, made in the form of a ring, in its extreme lower position. The means 6 for regulating freezing also include a pusher 9 with a gasket made of heat-insulating material (foam) kinematically connected to the bellows 10, located in the jacket of the refrigerant carrier 4 and fixed in the lower part of the cup 2. At the same time, a depression is made in the lower part of the pusher 9 place in it a glass 11 with a cooled object (donor kidney),

The operation of the device is as follows. .

Before starting the operation of the thermostat, a glass 2 with water 4, a pusher 9, a glass 2 with a donor organ installed in the recess is removed from the refrigerator. All this is placed in a thermally insulated case 1. Next, a vessel 7 with supercooled (up to minus 15 - minus 18 ° С) ice 8 is removed from the refrigerator’s freezer and installed on the heat insulating pad of the pusher 9, after which the upper and lower parts of the thermally insulated body 1 are joined , I fix them with latches. The device is ready to go.

At the initial moment of operation of the thermostat, vessel-7 with supercooled ice 8 lies on a heat exchanger (ring) 3 and is connected through heat flow to water 4. As a result, freezing on the surface of ring 3 of a part of water 4 in the form of ice 12. Due to the phase transition of a part of water 4 into ice 12, the volume of coolant 4 increases and its pressure on the bellows 10 increases, under the influence of which the latter moves the pusher 9 with the vessel 7 upward from the heat exchanger 3, breaking the connection between the latter through the heat flux. This leads to the cessation of further freezing of ice 12 on the heat exchanger 3,

Since water o possesses the property of anomalous expansion, only water with a temperature of 4 ° C is retained in the lower zone of glass 2 (water at this temperature has the highest density). Thanks to the placement of the glass 11 with the donor organ in the lower part of the water jacket, thermostating occurs at a temperature of 4 ° C.

As ice 12 melts, the volume of refrigerant 4 decreases, the bellows 10 spreads, and the pusher 9 moves down, lowering the vessel 7 with supercooled ice 8 to the heat exchanger 3. After restoring the initial level of the ice fraction 12 on the heat exchanger 3, the thermal connection the flow of the latter with the vessel 7 is automatically stopped. .

At the end of the temperature control, the cup 11 with the cooled donor organ is removed from the thermostat by the pusher 9, having previously opened the latches and disconnected the upper part of the insulated housing 1 from the lower one.

Claims (1)

The claims A thermostat comprising a thermally insulated body, a cup with a heat exchanger made of highly heat-conducting material for the object to be cooled, placed in a coolant to form a cavity with a body in the form of a rotation figure of a U-shaped section, characterized in that, in order to increase the convenience in operation, it is provided with means to regulate freezing, the heat exchanger is made in the form of a ring and placed in the upper part of the glass, and the means for regulating freezing contains an ice vessel placed in the upper part of the housing axial movement and contact, with the heat-conducting ring, in its lowest position, the pusher with a gasket of heat insulating material and kinematically connected with the pusher. bellows, located in the coolant jacket and fixed in the lower part of the glass, while in the lower part In the center of the wheel, a recess is made to accommodate a cup with a cooled object therein.