Double-source variable-frequency directly-heated drying system
By using a dual-source variable frequency direct heating drying system, combined with a heat pump and a hot water unit, and utilizing temperature detection and frequency regulation, high-efficiency and energy-saving drying is achieved under different environmental conditions, solving the problems of low energy utilization and high energy consumption in traditional drying methods.
Patent Information
- Application Number
- CN202423036345.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-10
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-10
AI Technical Summary
Traditional drying methods have low energy efficiency, and heat pump drying has poor heat absorption effect and high energy consumption in low-temperature environments.
The system adopts a dual-source variable frequency direct heating drying system, which combines a heat pump unit and a hot water unit. By detecting the hot water temperature and the outlet air temperature, and by using the variable frequency of the water pump and the frequency adjustment of the compressor, the two systems can achieve complementary heating, with priority given to the use of the hot water unit to achieve energy-saving effects.
It achieves efficient and energy-saving drying under different environmental conditions. Through complementary heating of heat pumps and hot water units, it reduces energy consumption and improves energy utilization.
Smart Images
Figure CN223525526U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to heat pump technical field especially a kind of double-source variable frequency direct heating type drying system. BACKGROUND
[0002] The traditional drying principle is to heat the outside air to high-temperature hot gas, and then send the hot gas into the drying room through the air duct for drying. This way of directly heating high-temperature hot gas has low energy utilization rate and is not economical. Currently, heat pump drying method is increasingly used, which absorbs environmental air heat energy through heat pump circulation for drying. However, the outdoor fin evaporator has poor heat absorption effect at low ambient temperature, and the compressor has large rated power and energy consumption. SUMMARY
[0003] The utility model provides a kind of double-source variable frequency direct heating type drying system, more energy-saving to solve the technical problems that the utility model wants to solve.
[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a kind of double-source variable frequency direct heating type drying system, comprising a supply air passage and a heat pump unit, one end of the supply air passage is an air inlet end, the other end of the supply air passage is an air outlet end and is provided with a fan, the heat pump unit comprises a compressor, a heat pump condenser, an evaporator, an expansion valve and a gas-liquid separator, and the heat pump condenser is arranged in the supply air passage; further comprising a hot water unit, the hot water unit comprises a hot water heat source fin coil condenser arranged in the supply air passage, a water pump, a water tank and a boiler for heating water in the water tank, the output end of the water tank is connected to the input end of the hot water heat source fin coil condenser through the water pump, and the output end of the hot water heat source fin coil condenser is connected to the input end of the water tank. The principle of the utility model is as follows: the air outlet end of the supply air passage is set to an air outlet temperature, when the hot water temperature at the input end of the hot water heat source fin coil condenser is detected to be higher than the air outlet temperature and the air outlet is stable, the constant temperature air outlet temperature is maintained by frequency conversion of the water pump; when the heat quantity on the hot water side is sufficient, the compressor is reduced in frequency or not started; when the hot water temperature is detected to be insufficient to maintain the air outlet temperature, the compressor is started or increased in frequency. The two systems complement each other, the hot water unit is heated preferentially, and the energy-saving purpose is achieved.
[0005] As an improvement, the air inlet end of the supply air passage is provided with a filter and an ambient temperature detector.
[0006] As an improvement, the air outlet end of the supply air passage is provided with an air outlet temperature detector.
[0007] As an improvement, the hot water heat source fin coil condenser is arranged in front of the heat pump condenser, and an electric heater is arranged behind the heat pump condenser.
[0008] As an improvement, the boiler includes a biomass boiler and a gas-fired boiler, and the water tank is connected to the boiler via water pipes.
[0009] The beneficial effects of this utility model compared with the prior art are:
[0010] The system switches between heat pump unit heating and hot water unit heating, with the two systems complementing each other. The hot water unit heating is prioritized to achieve energy saving. Attached Figure Description
[0011] Figure 1 This is a block diagram of the present utility model. Detailed Implementation
[0012] The present invention will be further described below with reference to the accompanying drawings.
[0013] like Figure 1 As shown, a dual-source variable frequency direct-heating drying system includes an air supply duct, a heat pump unit, and a hot water unit. One end of the air supply duct is the air inlet, which is equipped with a pre-filter and an ambient temperature sensor; the other end of the air supply duct is the air outlet, which is equipped with a fan and an outlet air temperature sensor. The heat pump unit includes a compressor, a heat pump condenser, a liquid receiver, an evaporator, an expansion valve, and a gas-liquid separator. The refrigerant output from the compressor passes sequentially through a four-way valve, the heat pump condenser, the expansion valve, the liquid receiver, the evaporator, the four-way valve, and the gas-liquid separator before returning to the compressor. The heat pump condenser is located inside the air supply duct and heats the air passing through it. The hot water unit includes a hot water heat source finned coil condenser, a water pump, a water tank, and a boiler for heating water in the feed water tank, all located within the air supply duct. The output end of the water tank is connected to the input end of the hot water heat source finned coil condenser via the water pump, and the output end of the hot water heat source finned coil condenser is connected to the input end of the water tank. The water pump is a variable frequency pump, which draws hot water from the water tank to the hot water heat source finned coil condenser, which heats the air passing through the air supply duct. The boiler includes a biomass boiler and a gas-fired boiler. The water tank is connected to the boiler via water pipes, allowing users to operate different boilers to heat water according to the stored fuel. After heating, the water is stored in the water tank. The hot water heat source finned coil condenser is located in front of the heat pump condenser, and an electric heater is located behind the heat pump condenser to heat the air passing through the air supply duct.
[0014] The utility model discloses principles: the air outlet end of air supply channel sets up the air outlet temperature, when detecting hot water heat source fin coil condenser input end hot water temperature greater than the air outlet temperature, and can satisfy the air outlet stability, through water pump frequency conversion to maintain constant temperature air outlet temperature, when hot water side heat is enough, compressor reduces the frequency or does not start, when detecting that hot water temperature drops, is not enough to maintain the air outlet temperature, and compressor starts or frequency conversion. Two sets of systems complement each other, and the hot water unit heating is given priority to, reaches the energy -conserving purpose.
Claims
1. A dual-source variable frequency direct heating drying system, comprising an air supply duct and a heat pump unit, wherein one end of the air supply duct is an air inlet and the other end of the air supply duct is an air outlet and is equipped with a fan, and the heat pump unit comprises a compressor, a heat pump condenser, an evaporator, an expansion valve, and a gas-liquid separator, wherein the heat pump condenser is disposed within the air supply duct; characterized in that: The hot water unit comprises a hot water heat source finned coil condenser arranged in the air supply channel, a water pump, a water tank and a boiler for heating water of the water tank, an output end of the water tank is connected with an input end of the hot water heat source finned coil condenser through the water pump, and an output end of the hot water heat source finned coil condenser is connected with an input end of the water tank.
2. The dual-source variable frequency direct-fired drying system of claim 1, wherein: The air supply channel is provided with a filter and an ambient temperature detector at an air inlet end.
3. The dual-source variable frequency direct-fired drying system of claim 1, wherein: The air supply channel is provided with an air outlet temperature detector at an air outlet end.
4. The dual-source variable frequency direct-fired drying system of claim 1, wherein: The hot water heat source finned coil condenser is arranged in front of the heat pump condenser, and an electric heater is arranged behind the heat pump condenser.
5. The dual-source variable frequency direct-fired drying system of claim 1, wherein: The boiler comprises a biomass boiler and a gas boiler, and the water tank is connected with the boiler through a water pipe.