52 Kw R410A Ultra-Low Temperature Variable Frequency Cascade High Temperature For Slaughter House

Principle of 150 kw Ultra-low temperature variable frequency cascade high temperature heat pump unit
A cascade heat pump start-stop control method, device, computer equipment and storage medium; the method includes: detecting the inlet water temperature of the cascade heat pump; controlling the primary compressor to start; after the primary compressor is turned on, if the inlet water temperature If the second constant temperature startup condition is met, the secondary compressor is controlled to be turned on according to the start-stop control rule; if the inlet water temperature meets the second constant temperature shutdown condition, the secondary compressor is controlled to be turned off according to the start-stop control rule; the primary compressor is controlled to be turned off; this application In the embodiment, by detecting the inlet water temperature of the cascade heat pump, the opening and closing of the primary compressor is controlled according to the inlet water temperature, and the opening and closing of the secondary compressor is controlled according to the inlet water temperature and the start-stop control rule; the existing primary compressor is avoided. The opening of the primary compressor and the secondary compressor are judged according to the inlet water temperature of the cascade heat pump, which may cause the problem of excessive high pressure of the primary compressor and realize the protection of the primary compressor.

A cascade heat pump operation method and system, the method includes: acquiring a current ambient temperature; comparing the current ambient temperature with a preset switching temperature; and switching between single-stage compression operation and cascade operation according to the comparison result. The operation mode of the cascade heat pump, the value of the preset switching temperature is determined according to the target ambient temperature that the cascade operation is consistent with the performance of the single-stage compression under the same heating target, and the single-stage compression operation mode is: The high temperature stage of the cascade heat pump operates independently, and the cascade operation mode is that the low temperature stage and the high temperature stage of the cascade heat pump operate simultaneously. Based on the technical solution of the present invention, the method enables the heat pump system to work in a higher-performance operation mode under different working conditions and temperatures, and improves the performance of the heat pump system for producing high-temperature hot water throughout the year.
 
The ultra-low temperature variable frequency cascade high temperature heat pump unit adopts the form of R410A low temperature stage and R134a high temperature stage system. Heat exchange for making hot water or heating. The ultra-low temperature cascade high temperature heat pump unit adopts DC frequency conversion technology, which has high heating energy efficiency. Temperature can be stable heating 75 ° C.

Install of 52 kw Ultra-low temperature variable frequency cascade high temperature for slaughter houseAn air source cascade heat pump device, including a cascade heat pump system, the cascade heat pump system includes a low temperature cycle and a high temperature cycle, the low temperature cycle circuit is connected to the high temperature cycle; the main components of the low temperature cycle include an evaporator , compressor and evaporative condenser, the right end of the evaporative condenser is connected to the filter drier, the flow meter and the electronic expansion valve in sequence, and the left end of the evaporator is connected to the gas-liquid separator, low pressure switch, compressor and high pressure. The main components of the high temperature cycle include an economizer, a condenser and a high temperature compressor, the right end circuit of the high temperature compressor is connected to a check valve, the check valve circuit is connected to a capillary tube and a solenoid valve, and the right end of the capillary tube is connected The terminal communicates with the economizer. The invention organically combines the technologies of air source heat pump, cascade heating and high temperature heat pump, which greatly saves energy and improves the working efficiency of equipment at the same time.

An engine-driven cascade heat pump device comprising a cascade heat pump system, at least one engine system and a water circuit, characterized in that the cascade heat pump system includes a high temperature stage circulation system and a low temperature stage circulation system , High temperature stage compressor, condenser, high temperature stage liquid accumulator, high temperature stage throttle valve, high temperature stage refrigerant heater, condensing evaporator, high temperature stage gas-liquid separator, refrigerant side valve form high temperature stage refrigerant circulation system , low temperature stage compressor, condensing evaporator, low temperature stage liquid accumulator, low temperature stage throttle valve, low temperature stage refrigerant heater, evaporator, low temperature stage gas-liquid separator, refrigerant side valve to form low temperature stage refrigerant circulation system , the engine system is composed of an engine, an engine cooling heat exchanger, a flue gas heat exchanger, a cooling water bypass valve, and a fuel regulating valve. The invention can improve the utilization efficiency of fuel, realize the efficient utilization of energy, reduce pollution, and also realize The same unit completes multiple functions such as cooling in summer, heating in winter, and producing domestic hot water

Specification of 52 kw Ultra-low temperature variable frequency cascade high temperature for slaughter house