A heating and hot water device for radiator

Abstract

The utility model discloses a heating and hot water device for radiators in the field of thermal devices, including a heat exchanger tank, a compressor, a heat exchanger and an expansion valve, the heat exchanger tank including a coil inlet, a coil outlet, a medium inlet, a medium outlet and a heat exchange coil 1, the heat exchanger including a refrigerant inlet, a refrigerant outlet, a hot water circulation port 1 and a hot water circulation port 2, the two ends of the heat exchange coil 1 are respectively connected to the coil inlet and the coil outlet, the coil outlet is connected to the air inlet of the compressor through a pipeline, the exhaust port of the compressor is connected to the refrigerant inlet through a pipeline, the refrigerant outlet is connected to the coil inlet through a pipeline, the expansion valve is arranged on the pipeline between the refrigerant outlet and the coil inlet, and the hot water circulation port 1 and the hot water circulation port 2 are connected to the indoor heating terminal circulation pipeline. The utility model can increase the water supply temperature to increase the heat transfer temperature difference of the radiator, thereby improving the thermal efficiency of the heating system.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal devices, and particularly relates to a heating and hot water device for a radiator. Background Art

[0002] In 2013, Beijing launched the "Coal Reduction and Replacement for Clean Air Action". As one of the series of measures, rural areas carried out the "coal to clean energy" work, and then many places in the north successively carried out the "coal to clean energy" work. Among them, "air source heat pump heating equipment" replaced traditional electric boilers or coal stoves and became the main force of "coal to electricity". In the northern region, the indoor heating terminals are mostly radiators. According to the relevant requirements of the "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings" GB50736-2012, "The radiator heating system should use hot water as the heat medium, and the radiator central heating system should be designed for continuous heating at a heat medium temperature of 75 / 50℃ or 85 / 60℃." The design water supply temperature should not be lower than 75℃, but the maximum outlet water temperature of most air source heat pump units is only about 60℃. According to many years of promotion and application experience, replacing the original boiler with an air source heat pump unit and retaining the original radiator heating indoors has led to slow indoor heating, low indoor temperature, and a significant decline in the user experience in cold weather. How to increase the water supply temperature to increase the heat transfer temperature difference of the radiator and thus improve the thermal efficiency of the heating system with little change in the structure of the heating terminal system has become an urgent problem to be solved. Utility Model Content

[0003] The purpose of the utility model is to provide a heating and hot water device for a radiator. The device is suitable for a radiator heating system. Compared with a traditional air source heat pump heating system, it can significantly increase the heating water supply temperature, increase the heat dissipation power of the indoor radiator, improve the thermal efficiency of the heating system, and enhance the user experience.

[0004] The purpose of the utility model is achieved as follows: a heating and hot water device for a radiator, comprising a heat exchange water tank, a compressor, a heat exchanger and an expansion valve, the heat exchange water tank comprising a coil inlet, a coil outlet, a medium inlet, a medium outlet and a heat exchange coil 1, the heat exchanger comprising a refrigerant inlet, a refrigerant outlet, a hot water circulation port 1 and a hot water circulation port 2, the two ends of the heat exchange coil 1 are respectively connected to the coil inlet and the coil outlet, the coil outlet is connected to the air inlet of the compressor through a pipeline, the exhaust port of the compressor is connected to the refrigerant inlet through a pipeline, the refrigerant outlet is connected to the coil inlet through a pipeline, the expansion valve is arranged on the pipeline between the refrigerant outlet and the coil inlet, and the hot water circulation port 1 and the hot water circulation port 2 are connected to the indoor heating terminal circulation pipeline.

[0005] When the utility model is in use, the medium inlet and the medium outlet are connected to the air source heat pump unit through pipelines. When working, the high-temperature and high-pressure refrigerant gas is discharged from the exhaust port of the compressor, enters the heat exchanger for condensation, and the refrigerant becomes liquid. At the same time, the water circulating at the heating end flows through the heat exchanger, the temperature rises, and is recirculated to the end for heating. The liquid refrigerant enters the heat exchange coil 1 of the heat exchange water tank after throttling by the expansion valve to evaporate. The evaporated gaseous refrigerant returns to the air inlet of the compressor, and the cycle repeats. After the water in the heat exchange water tank cools down, the air source heat pump unit is started for heating, thereby ensuring the evaporation temperature of the refrigerant in the heat exchange coil 1, and then ensuring the heating heat demand at the end.

[0006] Compared with the prior art, the beneficial effects of the utility model are:

[0007] 1. Use air source heat pump unit to produce low-temperature hot water as heat source, and then drive the refrigerant circulation through the compressor to obtain hot water with higher temperature. The working conditions of both are relatively ideal, the overall heating performance coefficient does not decrease, and the terminal hot water is more guaranteed.

[0008] 2. The decoupling of the air source heat pump unit operation and the cooling operation of the terminal heating is achieved through the water exchange tank. There is no need for complex control logic, and there is no need to consider the impact of external temperature changes or defrosting on the heating operation. The system operation is stable and reliable.

[0009] Furthermore, it also includes an air source heat pump unit, which includes a circulation outlet and a circulation inlet. The circulation outlet is connected to the medium inlet through a pipeline, and the medium outlet is connected to the circulation inlet through a pipeline. A heat pump circulation pump is provided between the medium outlet and the circulation inlet.

[0010] Furthermore, the water exchange water tank also includes a heat exchange coil 2, and both ends of the heat exchange coil 2 are respectively connected to a medium inlet and a medium outlet, and the medium inlet and the medium outlet are connected to the split air source heat pump unit through a refrigerant pipeline.

[0011] Furthermore, a terminal circulation pump is provided on the pipeline connecting the hot water circulation port 1 with the indoor room.

[0012] Furthermore, an exhaust valve is provided on the top of the water exchange tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic structural diagram of the first embodiment of the present utility model.

[0014] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0015] Among them, 1. heat exchange water tank; 2. compressor; 3. heat exchanger; 4. expansion valve; 5. terminal circulation pump; 6. heat pump circulation pump; 7. air source heat pump unit; 8. split air source heat pump unit; 101. heat exchange coil 1; 102. coil inlet; 103. coil outlet; 104. medium inlet; 105. medium outlet; 106. heat exchange coil 2; 301. refrigerant inlet; 302. refrigerant outlet; 303. hot water circulation port 1; 304. hot water circulation port 2; 701. circulation outlet; 702. circulation inlet. DETAILED DESCRIPTION Embodiment 1

[0016] like Figure 1 As shown, a heating and hot water device for a radiator includes an air source heat pump unit 7, a water exchange tank 1, a compressor 2, a heat exchanger 3 and an expansion valve 4; the air source heat pump unit 7 includes a circulation outlet 701 and a circulation inlet 702; the water exchange tank 1 includes a coil inlet 102, a coil outlet 103, a medium inlet 104, a medium outlet 105 and a heat exchange coil 101; the heat exchanger 3 includes a refrigerant inlet 301, a refrigerant outlet 302, a hot water circulation port 1 303 and a hot water circulation port 2 304; the circulation outlet 701 is connected to the medium inlet 104 through a pipeline, and the medium outlet 105 is connected to the circulation inlet 702 through a pipeline. A heat pump circulation pump 6 is provided between the medium outlet 105 and the circulation inlet 702; the two ends of the heat exchange coil 101 are respectively connected to the coil inlet 102 and the coil outlet 103, the coil outlet 103 is connected to the air inlet of the compressor 2 through a pipeline, the exhaust port of the compressor 2 is connected to the refrigerant inlet 301 through a pipeline, the refrigerant outlet 302 is connected to the coil inlet 102 through a pipeline, the expansion valve 4 is arranged on the pipeline between the refrigerant outlet 302 and the coil inlet 102, the hot water circulation port 1 303 and the hot water circulation port 2 304 are connected to the indoor heating terminal circulation pipeline; a terminal circulation pump 5 is provided on the pipeline connecting the hot water circulation port 1 303 and the indoor room.

[0017] When this embodiment is working, the high-temperature and high-pressure refrigerant gas is discharged from the exhaust port of the compressor 2, enters the heat exchanger 3 for condensation, and the refrigerant becomes liquid. At the same time, the water circulating at the heating terminal passes through the heat exchanger 3, the temperature rises, and is circulated to the terminal for heating. The liquid refrigerant enters the heat exchange coil 101 of the heat exchange water tank 1 after throttling by the expansion valve 4 to evaporate. The evaporated gaseous refrigerant returns to the air inlet of the compressor 2, and the cycle repeats. After the water in the heat exchange water tank 1 cools down, the heat pump circulation pump 6 and the air source heat pump unit 7 are started for heating, thereby ensuring the evaporation temperature of the refrigerant in the heat exchange coil 101, and then ensuring the heating heat demand at the terminal. Embodiment 2

[0018] like Figure 2As shown, the difference between this embodiment and the first embodiment is that: the air source heat pump unit 7 is a split type; the water exchange water tank 1 also includes a heat exchange coil 106, and the two ends of the heat exchange coil 106 are respectively connected to the medium inlet 104 and the medium outlet 105, and the medium inlet 104 and the medium outlet 105 are connected to the split air source heat pump unit 8 through a refrigerant pipeline; preferably, an exhaust valve is provided on the top of the water exchange water tank 1.

[0019] When this embodiment is working, the high-temperature and high-pressure refrigerant gas is discharged from the exhaust port of the compressor 2, enters the heat exchanger 3 for condensation, and the refrigerant becomes liquid. At the same time, the water circulating at the heating end passes through the heat exchanger 3, the temperature rises, and is recirculated to the end for heating. The liquid refrigerant enters the heat exchange coil 1 101 of the heat exchange water tank 1 after throttling by the expansion valve 4 to evaporate. The evaporated gaseous refrigerant returns to the air inlet of the compressor 2, and the cycle repeats. After the water in the heat exchange water tank 1 cools down, the split air source heat pump unit 8 is started for heating. The heat exchange coil 2 106 serves as the condenser of the split air source heat pump unit 8, and continuously transfers heat to the water in the heat exchange water tank 1, thereby ensuring the evaporation temperature of the refrigerant in the heat exchange coil 1 101, and then ensuring the heating heat demand at the end.

[0020] The beneficial effects of the present invention are: utilizing the air source heat pump unit 7 or the split air source heat pump unit 8 to produce low-temperature hot water as a heat source, and then driving the refrigerant circulation through the compressor 2 to obtain hot water with a higher temperature, both of which have relatively ideal working conditions, the overall heating performance coefficient does not decrease, and the terminal hot water is more guaranteed; compared with the traditional air source heat pump heating system, it can significantly increase the heating water supply temperature, increase the heat dissipation power of the indoor radiator, improve the thermal efficiency of the heating system, and enhance the user experience.

[0021] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A heating and hot water device for a radiator, comprising a heat exchange water tank, a compressor, a heat exchanger and an expansion valve, characterized in that: The heat exchange water tank includes a coil inlet, a coil outlet, a medium inlet, a medium outlet and a heat exchange coil 1. The heat exchanger includes a refrigerant inlet, a refrigerant outlet, a hot water circulation port 1 and a hot water circulation port 2. The two ends of the heat exchange coil 1 are respectively connected to the coil inlet and the coil outlet. The coil outlet is connected to the air inlet of the compressor through a pipeline. The exhaust port of the compressor is connected to the refrigerant inlet through a pipeline. The refrigerant outlet is connected to the coil inlet through a pipeline. The expansion valve is arranged on the pipeline between the refrigerant outlet and the coil inlet. The hot water circulation port 1 and the hot water circulation port 2 are connected to the indoor heating terminal circulation pipeline.

2. A heating and hot water device for a radiator according to claim 1, characterized in that: It also includes an air source heat pump unit, which includes a circulation outlet and a circulation inlet. The circulation outlet is connected to the medium inlet through a pipeline, and the medium outlet is connected to the circulation inlet through a pipeline. A heat pump circulation pump is provided between the medium outlet and the circulation inlet.

3. A heating and hot water device for a radiator according to claim 1, characterized in that: The water exchange water tank also includes a heat exchange coil 2, and the two ends of the heat exchange coil 2 are respectively connected to a medium inlet and a medium outlet, and the medium inlet and the medium outlet are connected to the split air source heat pump unit through a refrigerant pipeline.

4. A heating and hot water device for a radiator according to any one of claims 1 to 3, characterized in that: A terminal circulation pump is arranged on the pipeline connecting the hot water circulation port 1 with the indoor room.

5. A heating and hot water device for a radiator according to any one of claims 1 to 3, characterized in that: An exhaust valve is arranged on the top of the heat exchange water tank.

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