SU1090270A3 - Device for metered supply of liquid supply of liquid batches - Google Patents

Abstract

A device for dispensing liquid portions containing a series of accumulative chambers and a network of channels connected with them for messages between the chambers, the kgikdy channel communicating the two chambers and configured to shut it off with the help of a fridge freezing liquid and opening it with An electric heating element melting a frozen liquid, characterized in that in order to increase speed, the channels are located in one plane and each of them is made in the form of a flat slit with a distance between The walls are less than 0.5 mm, and the electric heating element is made in the form of film resistance fixed to. common canal wall and located under the refrigerator. O) CD About tc

Description

The invention relates to devices for the distribution and dosing of fluid and may find freezing in various sectors of the national economy, in particular in medical equipment. A device for dosing the delivery of fluid portions is known, comprising a number of storage chambers and a network of channels associated with them for messages between the chambers, each channel communicating two chambers and configured to shut it off with the help of a fridge freezing liquid and open it with an electric heating element one races pla frozen liquid guide L i A disadvantage of the known device is relatively great inertia in onnost caused pain large mass of the channel walls. The purpose of the invention is to increase the speed of the device. This goal is achieved by the fact that in the device for dosed supply of portions of liquid, containing a number of accumulating chambers and a network of channels connected with them for messages between the chambers, each channel communicating two chambers and configured to shut it off using a freezing cooler, and its opening using an electric heating element melting the frozen liquid, the channels are located in the same plane, and each of them is made in the form of a flat slit with a distance between the walls of less than 0.5 m m, and the electric heating element is made in the form of film resistance, fixed on the common wall of the channels and located under the refrigerator. On Fig.1 presents the device, a general view; in fig. 2 - the same, top view; FIG. 3 is a section D-D of FIG. 2; in fig. 4 - section bb of fig 2; in fig. 5 - electric heating element, general view; in fig, b - a part of section bb in fig, 2 with an electric heating element. The device for dosed supply of portions of the liquid comprises a housing 1 in the form of a rectangular parallelepiped with accumulative chambers 2, the chambers 2 are open at the ends 3 and 4. of the case 1 and are parallel to each other. On the casing 1, a joint stock 5 and b is fixed for supplying the working fluid. The main lines of the chambers 2 pass mainly inside the housing 1 near the ends 3, the sections parallel to the ends 3 are indicated by the positions 7 and 8, the holes on the end 3 related to the main line are marked by the positions 9 and 10, the positions 11 and 12 denote openings that are connected by channels 13 and 14 to the inlet nozzles 5 of the main line, located at the end 15 of the housing 1. The other main line goes to the end 4 of the housing 1 and connects to the inlet nozzles 6 in the same way. Each of the four accumulation chambers is connected by both ends through connecting channels 16 and 17 with sections 7 and 8 of the respective main line passing inside the housing. Each connecting channel extends a short distance along the surface of housing 1; the openings at the end 3, related to the connecting channels, are designated by the positions 18 and 19. The housing 1 is provided with a cover 20 in which a channel network is formed for communications between the cameras 2. These channels are located in one plane and each of them is filled with - a flat slot 21 with a distance between the walls of less than 0.5 mm. In the lid 20, a cooler 22 is mounted, and under it an electric heating element in the form of a rectangular film electrical resistance 23. The resistances 23 are connected between the film conductor 24 and the platforms 25 are covered with a conductive material. The resistors 23 can be made of a mixture of oxides of noble metals, and the cover 20 can be made of alumina. Between the surfaces of the cover 20 and the end 3 of the housing 1 there is an insulating material 26. On the side of the end 3, the wall of the slot 21 is formed by a thermistor resistance 27. A similar cover is located on the opposite end 4 of the case 1. The device is based on temperature control in the slot 21 The refrigerator 22 continuously provides the temperature around the slit 21 below the freezing point of the fluid flowing through the channel 16. However, an electric current passing through the resistance 23 produces heat that melts the liquid. If the electric current is turned off when the channel 16 is filled with liquid, then the refrigerator freezes the liquid in the slot 21, closing it. If channel 16 is not filled with liquid at the moment when the current is turned off, then spruce 21 remains open to the gas flow. Thus, the device has three functional positions: spruce 21 is completely covered; open flow of gas and open to project gas and liquid. Thermistor resistance 27 serves to determine the operating position of the device, as well as to give a signal about

changes in the state of the substance in the gap 21.

The proposed device has a minimum dead space and small dimensions, consumes little energy, which allows it to be used to obtain small portions of fluid with high speed.

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Claims (1)

DEVICE FOR DOSED FEEDING OF PORTIONS OF LIQUID, containing a number of storage chambers and a network of channels associated with them for communication between cameras, each channel communicating two chambers and made with the possibility of its closure with the help of a refrigerator freezing the liquid, and opening it using an electric heating element, melting a frozen liquid, characterized in that in order to improve performance, the channels are located in the same plane and each of them is made in the form of a flat slit with a distance between the walls less than 0.5 mm, and the electric heating element is made in the form of a film resistance mounted on. common wall of channels and located under the refrigerator. - § ώ Phi. " 1