RU120846U1 - MILK COOLING DEVICE WITH COLD BATTERY - Google Patents

Abstract

A device for cooling milk with a cold accumulator, consisting of a reservoir with a path on which a milk pump and a heat exchanger are installed, and a heat carrier path passing through the heat exchanger, with a circulation pump connected to the inlet of the cold accumulator and a thermoelectric unit, characterized in that the device is made in the form of a two-section container, and the first section is made with thermal insulation and contains a reservoir with a milk path and a heat exchanger, a milk temperature sensor that is installed on the reservoir, an air temperature sensor, and milk is circulated using a circulation pump in a closed circuit from the reservoir through a heat exchanger valves are installed at the inlet and outlet of the reservoir, the coolant path is made with a cold accumulator and a temperature sensor, and three valves, a circulation pump and a thermoelectric unit are installed on its path, with the first valve installed at the coolant inlet, the second at the outlet of the coolant, and the third - between the inlet and outlet of the coolant, the second section of the container contains a battery, a charger and a control unit with four inputs, the first of which is connected to an air temperature sensor, the second to a milk temperature sensor, and the third to a sensor coolant temperature, the fourth - from storage batteries, as well as three outputs, the first of which is connected to the milk circulation pump, the second - to the coolant circulation pump, the third - to the thermoelectric unit.

Description

The utility model is intended for use in the food industry for thermal control and transportation of milk and other liquids.

A device for transporting milk by road is known, comprising a car engine cooling system, a milk tank, a thermoelectric cooler, a temperature sensor, a control unit, thermoelectric cooler heat exchangers and a milk heat exchanger, a thermoelectric generator mounted on an engine exhaust pipe, and includes a hot heat exchanger connected to hot junctions and associated with exhaust gases; a cold heat exchanger connected to cold junctions and connected to a cooling system of an automobile engine [US Pat. RF for utility model No. 100199, IPC F25B 21/02. Publ. December 10, 2010, BI No. 34, “Device for the transportation of milk by road” / author Vasilieva IG].

The disadvantage of this device is the high energy consumption for cooling milk.

A device for cooling milk with a cold accumulator is known, comprising a heat exchanger with a milk path and a heat carrier path, the outlet of which is connected to the inlet of the cold accumulator, a thermoelectric unit with heat exchange paths of cold and hot junctions, the last of which is connected to a source of natural cold, characterized in that the cold accumulator is made in the form of an isothermal tank filled with a coolant with a low freezing (melting) temperature and the vessels with liquid placed in it, having the freezing (melting) temperature is higher than that of the coolant, and the output of the cold accumulator is communicated with a pump that supplies the coolant sequentially to the entrance to the heat exchange path of the cold junction of the thermoelectric unit and to the entrance to the heat transfer path of the heat exchanger [US Pat. RF №2175833, IPC A01J 9/04, F25D 3/00, F25B 21/02. Publ. November 20, 2001 BI No. 32 “Milk cooler with a cold accumulator” / authors V.N. Gusev et al .;].

The disadvantage of this device is the high energy costs associated with low efficiency of thermoelectric elements.

This technical solution is selected by the authors as a prototype.

The technical result of the utility model is to reduce energy consumption and increase efficiency.

The technical result is achieved in that a device for cooling milk with a cold accumulator consisting of a tank with a path on which a milk pump and a heat exchanger is installed, and a heat carrier path passing through the heat exchanger, with a circulation pump connected to the inlet of the cold accumulator and a thermoelectric unit, a device made in the form of a two-section container, and the first section is made with thermal insulation and it contains a tank with a milk path and a heat exchanger, a milk temperature sensor, which is installed on the tank, an air temperature sensor, and the milk is circulated using a circulation pump in a closed circuit from the tank through the heat exchanger to the tank, valves are installed at the inlet and outlet of the tank, the coolant path is made with a cold accumulator and a temperature sensor, and three are installed on its path valves, a circulation pump and a thermoelectric unit, the first valve installed at the inlet of the coolant, the second at the outlet of the coolant, and the third between the inlet and outlet of the heat carrier, in the second section of the container there is a rechargeable battery, a charger and a control unit with four inputs, the first of which is connected to the air temperature sensor, the second to the milk temperature sensor, the third to the coolant temperature sensor, the fourth to the battery, and three outlets, the first of which is connected to the milk circulation pump, the second to the heat carrier circulation pump, and the third to the thermoelectric block.

The heat transfer path with three valves allows you to reduce energy consumption through the use of a stationary refrigerating machine with high efficiency. A control unit with four inputs that are connected to air temperature sensors, a milk temperature sensor, a coolant temperature sensor, as well as a battery, three outputs are connected to a milk circulation pump, a coolant circulation pump and a thermoelectric unit to increase the efficiency of the installation. Rechargeable batteries allow maintaining the set milk temperature during storage or transportation.

Figure 1 presents the electrical diagram of a device for cooling milk with a cold accumulator, and figure 2 diagram of a device for cooling milk with a cold accumulator.

A device for cooling milk with a cold accumulator consists of: a two-section container 1, a heat exchanger 2, a milk circulation pump 3, a liquid tank 4, a milk temperature sensor 5, a milk outlet valve 6, an air temperature sensor 7, a control unit 8, a battery 9, charger 10, thermoelectric unit 11, fan 12, coolant circulating pump 13, cold accumulator 14, coolant temperature sensor 15, first 16 valves, second 17, third 18, milk inlet valve 19, heat olyatsii 20.

The device operates as follows.

The operation of the installation for cooling milk with a cold accumulator can be divided into three stages: accumulation of cold, milk cooling, transportation.

At the stage of accumulation of cold, it is necessary to close the valve 18 and through the valves 16 and 17 to connect to the installation of a stationary refrigeration machine for cooling the coolant. Using the control unit 8, the circulation pump 13 is turned on, which receives energy from the battery 9, and it, in turn, is charged under the stationary conditions from the charger 10. After that, a coolant with a low freezing (melting) temperature from the cold accumulator 14, which is two containers connected by a pipeline, spaced on different sides of the container to ensure uniform cooling and better load distribution of the two-section container 2, begins to circulate through the pipe oprovodu through a stationary refrigerating machine in which it is cooled. The cooling cycle will continue until the coolant temperature sensor 15 installed in the cold accumulator 14 detects the set temperature, after which the circulation pump 13 will turn off.

The milk cooling step can be carried out in two ways. Milk enters the tank 4 by gravity through the valve 19 into the tank 4. After the tank is filled with milk, the valve 19 is closed and the milk cooling mode is set using the control unit 8. In the first method for cooling milk, the control unit includes a milk circulation pump 3 and a heat carrier circulation pump 13. The milk will circulate through the heat exchanger 2,

where the coolant will draw heat from the milk. The circulation pump will circulate the coolant through a stationary chiller, where it will cool. In the second method of cooling milk, it is envisaged to shut off a stationary refrigeration machine, for this, valves 16 and 17 are closed, and valve 18 opens. The control unit includes a milk circulation pump 3, a heat carrier circulation pump 13 and a thermoelectric unit 11. In a heat exchanger 2, the heat carrier will take heat from the milk, and in turn will be cooled in the thermoelectric unit 11. The milk cooling mode will continue until the sensor temperature of milk 5, installed on the tank 4 will not signal the achievement of the set temperature in the control unit 8. After that, the control unit will turn off the pumps 3 and 13, and in the second method of cooling the milk, it will supplement flax thermoelectric unit 11 turns off.

At the stage of transporting the container with milk, it is necessary to close the first valve 16 and second 17, and open the third valve 18, set the transportation mode on the control unit 8, disconnect the charger 10 from the power source. The battery 9 ensures the operation of the electrical circuit of the container, and the battery capacity varies depending on the duration of transportation of the container. Thermal insulation 20 of the first section of the container sets the temperature inside the section, but when it changes, the air temperature sensor 7 sends a signal to the control unit 8, and it, in turn, turns on the thermoelectric block 11, which is located on the side walls of the first section of the container and cools the coolant in cold accumulator 14. The hot junctions of the thermoelectric unit are cooled using radiators outside the heat-insulated casing and fans 12, as well as by flowing air during transport irovki. The walls of the cold accumulator 14 are made of a material with a high coefficient of thermal conductivity, which ensures the selection of heat from air in the cargo room and maintain the desired temperature. If the heat inflows into the cargo room become too high and the temperature of the milk in the tank 4 rises, the milk temperature sensor 5 sends a signal to the control unit 8, after which the milk circulation pump 3 and the heat carrier circulation pump 13 are turned on. The milk begins to circulate through the heat exchanger 2, cooling due to the heat carrier. When the set temperatures are reached, the control unit turns off the pumps and the thermoelectric unit. The control unit 8 also allows you to change the polarity of the thermoelectric unit 11, which allows heating the coolant in the cold accumulator 14, and, therefore, makes it possible to transport milk in the winter season. The valve 6 serves to drain the milk by gravity from the tank after storage or transportation.

The proposed device for cooling milk with a cold accumulator can reduce energy consumption by using a stationary refrigeration machine, as well as through a control unit that controls the constancy of temperature, which increases the life of the equipment, in addition, the device allows you to transport milk both in case of positive and negative ambient temperatures.

Claims (1)

A device for cooling milk with a cold accumulator, consisting of a tank with a path on which a milk pump and a heat exchanger are installed, and a heat carrier path passing through the heat exchanger, with a circulation pump connected to the inlet of the cold accumulator and a thermoelectric unit, characterized in that the device is made in the form of a two-section container, and the first section is made with thermal insulation and it contains a tank with a milk path and a heat exchanger, a milk temperature sensor, which is installed on and the tank has an air temperature sensor, and the milk is circulated using a circulation pump in a closed circuit from the tank through the heat exchanger to the tank, valves are installed at the inlet and outlet of the tank, the coolant path is made with a cold accumulator and a temperature sensor, and three valves are installed on its path , a circulation pump and a thermoelectric unit, the first valve installed at the inlet of the coolant, the second at the outlet of the coolant, and the third between the inlet and outlet of the coolant, in the second section of the container contains a rechargeable battery, a charger and a control unit with four inputs, the first of which is connected to an air temperature sensor, the second to a milk temperature sensor, the third to a coolant temperature sensor, the fourth to a rechargeable battery, and three outputs, the first of which is connected to the milk circulation pump, the second to the heat carrier circulation pump, the third to the thermoelectric unit.