RU44173U1 - DEVICE FOR THERMAL REGULATION OF MILK DURING ITS TRANSPORT - Google Patents

Abstract

The device relates to refrigeration and can be used by refrigerated cars to transport milk from a dairy farm to a dairy factory. The task is to improve the quality of milk by maintaining the optimal temperature regime of milk during its transportation by car. The problem is solved by using thermoelectric elements, heat exchangers and a thermoelectric generator in the device. The heat exchanger of the hot junctions of the thermocouples is connected to the engine cooling system, and the heat exchanger of the cold junctions of the thermocouples is connected to the heat exchanger installed in the milk tank. To supply thermoelectric elements in this device, a thermoelectric generator is installed on the exhaust pipe of the engine, the hot junctions of which work from the exhaust gases, and the cold junctions are connected to the engine cooling system. The electricity generated by the thermoelectric generator is used to power the thermoelectric elements of the device. Thus, this device maintains the desired temperature at any time of the year and thereby improves the quality of milk during its transportation by car.

Description

The invention relates to refrigeration and can be used by automobile vehicles.

A device for cooling, heating and stabilizing the temperature of products [1]. The device contains thermoelectric elements, a temperature sensor, a radiator, a reverse unit, a mode setting unit, and a control unit.

In this device, cold junctions of thermoelectric elements are used to cool food products, and hot junctions of thermoelements under the influence of a fan interact with atmospheric air and the operating temperature is maintained.

However, this device is not suitable for cooling a milk tank when transported by car from a dairy farm to a dairy plant.

The closest technical solution (prototype) is "Device for regulating milk during transportation" [2]. This device contains a milk tank, thermoelectric elements, heat exchangers of cold and hot junctions, a temperature sensor, a closed circuit of a coolant (coolant), a control unit.

The main disadvantage of this device is that thermoelectric elements consume on-board electricity, which can negatively affect the operation of other consumers of the car.

The claimed invention solves the problem of creating a device for thermoregulation of milk during its transportation.

The technical result in this case is the maintenance of an optimal temperature regime when transporting milk by car.

Technically, the result is achieved by the fact that in a known device containing a tank with milk, thermoelectric elements, heat exchangers of cold and hot junctions, a temperature sensor, a closed loop of a coolant (coolant), a control unit, it additionally contains a thermoelectric generator, the hot junctions of which are located in the exhaust pipe of the engine and cold junctions are connected to the engine cooling system, and the thermoelectric generator is connected to the power supply unit of thermoelectric elements.

The attached drawing shows a device for thermoregulation of milk during transportation. The device contains a tank (tank) 1 for milk, a heat exchanger 2, a pump 3, a thermoelectric cooler 4, consisting of thermoelectric elements 5, a heat exchanger of hot junctions 6, a heat exchanger of cold junctions 7; control unit 8, engine 9, pump 10, temperature sensor 11, closed cold flow channels 12, 13, cooling system channels 14, 15, power supply 16, electric motor 17, exhaust pipes 18, 22, thermoelectric generator 19, cooling system channels 20 , 21, electric current channel 23.

The heat exchangers 6, 7 are tightly pressed against the thermoelectric elements 5. A brine, for example, a solution of NaCl or CaCl ₂ salts, circulates through a closed circuit, that is, through channels 12, 13 using a pump 3 with an electric motor 17.

A thermoelectric generator 19 is installed on the exhaust pipe 18, the hot junctions of which are located in the exhaust pipe 18, and the cold junctions are cooled by the liquid of the cooling system, which enters the channel 20. After cooling, the channel 21 returns the liquid back to the cooling system in the channel 15.

The control unit 8 controls the operation of thermoelectric elements 5. Thermoelectric elements 5 can operate both in cooling mode (in the summer season) and in heating mode (in the winter season).

A device for thermoregulation of milk during transportation by car works as follows. When the automobile engine 9, the proposed device starts to work. In this case: if the milk temperature is greater than the specified optimal value, the temperature sensor 11 sends an electrical signal to the control unit 8, which includes thermoelectric elements 5 and the device starts to work. In this case, the cooling system fluid enters the heat exchanger 6 through the channel 14, heat is removed from the hot junctions of the thermoelectric elements 5, and through the channel 15 it is fed back to the engine cooling system.

The brine through channel 13 enters the heat exchanger 7, where heat is exchanged between the cold junctions of the thermoelectric elements 5, after which the cooled brine enters through the channel 12 to the heat exchanger 2 and milk is cooled by heat exchange with milk. Furthermore, the temperature of the milk is monitored by temperature sensor 11.

At the same time, the thermoelectric generator 19 begins to work. At the same time, heat from the exhaust gases entering the channel 18 and exhausting to the atmosphere is absorbed on the hot junctions of the thermoelectric generator, and from the cold side,

channel 22 is dissipated by the coolant of the cooling system (channels 20, 21) minus the electricity received at the external load.

At an external load, the thermoelectric generator 19 creates a voltage equal to the EMF, minus the voltage drop and internal resistance, the electric power is supplied to the power supply 16 through the channel 23 and is used to operate the thermoelectric elements 5.

Thus, maintaining the optimum temperature of milk, the proposed device during transportation of milk using thermoelectric elements and a thermoelectric generator increases the efficiency of its transportation.

INFORMATION

1. Utility Model Certificate No. 5015, Russia, MKI F 25 V 21/02. Thermoelectric device for cooling, heating and stabilizing the temperature of food products (V.N. Timofeev, G.I. Mikhailov, A.A. Ilyina and others (Russia); Published in BI No. 9 on September 16, 1997;

2. Patent for utility model No. 31637, Russia, MKI F 25 V 21/02. A device for controlling the temperature of milk during its transportation (V.N. Timofeev, G.E. Chekmarev, N.A. Galkina and others (Russia); Published in BI No. 23 08/08/03

Claims (1)

A device for thermoregulating milk during its transportation, containing a tank with milk, thermoelectric elements, heat exchangers of cold and hot junctions, a temperature sensor, a closed loop of a heat carrier, a coolant, a control unit, characterized in that it additionally contains a thermoelectric generator, the hot junctions of which are located in the exhaust the engine pipe, and cold junctions are connected to the engine cooling system, and the thermoelectric generator is connected to the power supply unit of the thermoelectric element in.