CN201066231Y - Frequency-changing wind-cooling refrigerator - Google Patents

Abstract

The utility model relates to a refrigerator, in particular to a frequency conversion air-cooled refrigerator. The frequency conversion air-cooled refrigerator of the utility model provides a refrigerant flow rate in a refrigeration circuit that can be dynamically adjusted according to the condensation pressure and the evaporation pressure. The refrigerator includes a control device and a refrigeration circuit. The refrigeration circuit includes a compressor, a condenser, a dry filter, a capillary tube, a solenoid valve, and an evaporator. They are connected in sequence to form a circuit. The control device includes a CPU and a pressure and temperature sensor. The CPU The refrigerator is centrally regulated, the solenoid valve is set as an electronic expansion valve, the electronic expansion valve is connected to the CPU, and is centrally regulated by the CPU; the refrigerant flow rate in the refrigeration circuit of the utility model can be dynamically adjusted, thereby ensuring that the entire refrigeration circuit of the refrigerator is always dynamic. It achieves the best match with the changing working conditions, and can exert the optimal cooling efficiency under various working conditions, so as to achieve the purpose of rapid cooling, precise temperature control and power saving.

Description

Inverter air-cooled refrigerator

technical field

The utility model relates to a refrigerator, in particular to a frequency conversion air-cooled refrigerator.

Background technique

The frequency conversion air-cooled refrigerators in the prior art generally include a control device and a refrigeration circuit. The refrigeration circuit includes a compressor, a condenser, a dry filter, a capillary tube, and an evaporator. They are connected in sequence to form a circuit. The refrigeration circuit is controlled by a The CPU in the device conducts centralized control, and the compressor in the inverter air-cooled refrigerator is a frequency-adjustable variable-speed compressor, which can provide different cooling capacities through frequency changes; the DC inverter fans installed next to the condenser and evaporator can provide different wind speeds. Change the heat exchange efficiency of the condenser and evaporator, but the flow rate of the capillary tube in the conventional refrigerator is fixed. When the working conditions change, the efficiency of the entire cycle is not optimal due to the bottleneck of the single flow rate. The role of the compressor and the variable frequency fan cannot be fully utilized, and the refrigeration circuit still cannot efficiently match the working conditions, and at the same time, it cannot meet the requirements of energy saving.

Contents of the invention

The purpose of the utility model is to overcome the above defects and provide a refrigerator in which the flow rate of the refrigerant in the refrigeration circuit can be dynamically adjusted according to the condensation pressure and the evaporation pressure.

The technical scheme of the frequency conversion air-cooled refrigerator of the present utility model is as follows: it includes a control device and a refrigeration circuit, and the refrigeration circuit includes a compressor, a condenser, a dry filter, a capillary, an electromagnetic valve, and an evaporator, and they are connected in sequence to form a circuit. The control device includes a CPU and pressure and temperature sensors. The CPU performs centralized regulation on the refrigerator, and the solenoid valve is set as an electronic expansion valve. The electronic expansion valve is connected to the CPU and is centrally regulated by the CPU.

The operating pressure range of the electronic expansion valve matches that of the compressor.

The refrigerant flow rate in the refrigeration circuit of the utility model can be dynamically adjusted, so as to ensure that the entire refrigeration circuit of the refrigerator can always dynamically achieve the best match with the changing working conditions, and can exert the optimal refrigeration efficiency under various working conditions , to achieve rapid cooling, precise temperature control, and power saving purposes.

Description of drawings

Fig. 1 is a structural schematic diagram of the refrigeration circuit of the frequency conversion air-cooled refrigerator of the present invention.

Detailed ways

The frequency conversion air-cooled refrigerator of the present utility model includes a control device and a refrigeration circuit, and the refrigeration circuit includes a compressor 1, a condenser 2, a dry filter 3, a capillary tube 4, an electronic expansion valve 5, and an evaporator 6, which are connected in sequence to form a circuit , the control device includes a CPU and pressure and temperature sensors, and the CPU performs centralized regulation and control on the refrigerator. The capillary 4 limits the operating pressure of the electronic expansion valve 5 and provides a maximum value for dynamic adjustment of the flow rate. The electronic expansion valve 5 is connected to the CPU and is centrally regulated by the CPU. In this way, during the operation of the refrigerator, the CPU can adjust the electronic expansion valve 5 in real time according to the changes of the frequency of the compressor, the condensing pressure and the evaporating pressure, thereby adjusting the flow rate of the refrigerant in the refrigeration circuit in real time. If the frequency conversion compressor and frequency conversion fan 7, 8 adjust the speed according to the requirements of the working conditions, so that the cooling capacity, condensation temperature and pressure, evaporation temperature and pressure change accordingly, the CPU can dynamically adjust the electronic expansion according to the collected pressure and temperature signals The valve 5 changes the flow rate, so that the four processes of the refrigeration cycle can be reorganized into a new optimized cycle, and the efficiency of the whole cycle can be improved. The frequency conversion air-cooled refrigerator of the utility model realizes the automatic adjustment of the refrigerant flow rate, cooperates with the frequency conversion compressor and the frequency conversion fan, so as to ensure that the entire refrigeration system of the refrigerator is always dynamically and optimally matched with the changing working conditions, and can be used in various working conditions. Under any circumstances, it can exert the optimal cooling efficiency to achieve rapid cooling, precise temperature control and power saving.

The frequency conversion air-cooled refrigerator of the utility model can be widely used in the field of refrigerators.

Claims (2)

1. A variable frequency air-cooled refrigerator, which includes a control device and a refrigeration circuit, the refrigeration circuit includes a compressor, a condenser, a filter drier, a capillary, a solenoid valve, and an evaporator, they are connected in sequence to form a circuit, and the control device includes a CPU and A pressure and temperature sensor, and the CPU centrally regulates the refrigerator, which is characterized in that: the solenoid valve is set as an electronic expansion valve, and the electronic expansion valve is connected to the CPU, and is centrally controlled by the CPU. 2. The inverter air-cooled refrigerator according to claim 1, wherein the operating pressure range of the electronic expansion valve matches that of the compressor.