CN219454066U - Multi-source heat pump heating device of polyethylene pipe heat collector - Google Patents

Abstract

The utility model relates to a multi-source heat pump heating device of a polyethylene pipe heat collector, which comprises a heat collector and a heat pump unit and is characterized in that: the solar energy and air energy main absorption surface of the heat collector is formed by connecting a plurality of thin PE pipes in parallel, two ends of the parallel thin PE pipes are respectively connected to the thick PE pipes, the thick PE pipes can also absorb solar energy and air energy, antifreeze fluid is filled into the heat collector to serve as a heat transfer medium of the heat collector, and the heat collector is provided with a heat transfer medium outlet and a heat transfer medium inlet; the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve, wherein the heat collector, the primary side of the evaporator and the antifreeze circulating pump form complete circulation through an antifreeze heat transfer medium; the evaporator secondary side, the compressor, the condenser primary side and the expansion valve form a complete cycle through the refrigerant. The advantages are that: the heat collector has low cost, corrosion resistance and long service life; the black polyethylene tube reduces the solar energy reflectivity and improves the heat collection efficiency; can absorb solar energy, air energy and environmental energy simultaneously, and has high energy efficiency.

Description

Multi-source heat pump heating device of polyethylene pipe heat collector

Technical Field

The utility model relates to a multi-source heat pump heating device of a polyethylene pipe heat collector, and belongs to the technical field of heat pump heat utilization devices.

Background

The energy consumption of the building in China is more than or equal to 30% in total energy consumption, and the energy consumption of a heating air conditioner is 50-70% of the energy consumption of the building, so that the aim of carbon-to-peak carbon neutralization and the aim of double carbon and the energy consumption of the building, namely a non-carbon energy substitution technology for the building, are supported. Wherein the total solar energy substitution ratio is more than or equal to 60 percent. In particular, the popularization of zero-carbon or micro-carbon emission construction in the middle and western regions with rich solar energy resources, better light field conditions and more heat consumption is significant, and the heat utilization and heat coupling technology of renewable energy sources such as solar energy, air energy and the like is of great importance. With the development of the age and the progress of technology, people put higher and higher requirements on the comfort of indoor environments, so that various building heating demands are continuously increased, and the construction of a clean, efficient and scientific building heating energy system based on the utilization of renewable energy is an effective way for improving the energy utilization efficiency, saving the energy and reducing pollution.

At present, the air source heat pump is widely applied to building heating, a fan coil evaporator of the air source heat pump adopts copper-aluminum metal, the cost is high, the heat source of the air source heat pump is heat energy (air energy for short) in air, and the heat pump can only absorb air energy and cannot absorb solar energy, so that the energy efficiency of the air source heat pump is limited.

The heat pump of the non-direct expansion aluminum calandria heat collector can absorb solar energy and air energy, and the heat collector adopts aluminum metal and has high cost. The aluminum calandria collector is filled with the antifreeze, which is easy to lead the aluminum to be corroded by electrolysis, and reduces the service life of the aluminum calandria collector. If the surface of the aluminum calandria is anodized with a solar radiation energy absorbing layer, the cost of the aluminum calandria collector is increased; if the solar radiation energy absorbing layer is not added on the surface of the aluminum calandria, the solar radiation energy reflectivity on the surface of the aluminum calandria is very high, and the solar energy absorbing efficiency of the aluminum calandria collector is reduced.

Disclosure of Invention

The utility model aims to overcome the defects of the air source heat pump heating and the heat pump heating of the non-direct expansion aluminum calandria heat collector, and provides the heat collector which has low cost, corrosion resistance and long service life; the multi-source heat pump heating device of the polyethylene pipe heat collector can absorb solar energy, air energy and environmental energy simultaneously and has high energy efficiency.

The utility model is realized by the following technical scheme:

the utility model comprises a heat collector and a heat pump unit and is characterized in that: the solar energy and air energy main absorption surface of the heat collector is formed by connecting a plurality of thin polyethylene pipes in parallel, two ends of the parallel thin polyethylene pipes are respectively connected to a thick polyethylene pipe, the thick polyethylene pipes can also absorb solar energy and air energy, the solar energy and air energy absorption surface of the thick polyethylene pipe is a secondary solar energy and air energy absorption surface, antifreeze fluid is filled into the polyethylene pipes of the heat collector to serve as a heat transfer medium of the heat collector, and the heat collector is provided with a heat transfer medium outlet and an inlet; the wall thickness of all the polyethylene pipes forming the heat collector is 0.1-1 mm; the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve, wherein the primary side of the evaporator is connected with the heat collector through an antifreeze circulating pump, and the heat collector, the primary side of the evaporator and the antifreeze circulating pump form complete circulation through an antifreeze heat transfer medium so as to transfer heat energy absorbed by the heat collector to the evaporator; the evaporator secondary side, the compressor, the condenser primary side and the expansion valve form complete circulation through a refrigerant, and heat energy is transferred to the condenser; the heat energy of the secondary side of the condenser is transmitted to a heating user heat dissipation system.

The heat pump unit makes the operation temperature of the heat collector lower than the atmospheric temperature, solar energy and air energy can be absorbed by the heat collector naturally at the same time, and the heat energy of the heat pump unit is derived from various energy sources, so the utility model is a multi-source heat pump heating device of the polyethylene pipe heat collector.

The polyethylene pipe of the heat collector is not provided with fins;

the polyethylene pipe forming the heat collector is a common black polyethylene pipe.

The utility model has the advantages that: the PE pipe is called PE pipe for short, the PE pipe has corrosion resistance, high strength and ageing resistance, electrolytic corrosion phenomenon is avoided, the PE pipe heat collector is low in cost, and the service life of the heat collector is prolonged; the PE pipe heat collector can absorb solar energy, air energy and environmental energy simultaneously, the absorbed energy is wide, the energy efficiency is high, and the PE pipe heat collector and the heat pump unit form a multi-source heat pump heating system.

Drawings

Fig. 1 is a schematic diagram of a multi-source heat pump heating device of a polyethylene pipe heat collector provided in an embodiment of the present application;

FIG. 2 is a front view of a Polyethylene (PE) tube collector provided in an embodiment of the present application;

FIG. 3 is a cross-sectional view of the Polyethylene (PE) tube collector shown in FIG. 1 taken along line A-A;

fig. 4 is a cross-sectional view of the Polyethylene (PE) tube collector shown in fig. 1 taken along line B-B.

In the figure: 10 is a Polyethylene (PE) pipe heat collector, 11 is a thick PE pipe, 12 is a thin PE pipe, 13 is a PE pipe heat collector inlet, 14 is a PE pipe heat collector outlet, 21 is an evaporator, 22 is a compressor, 23 is a condenser, 24 is an expansion valve, 25 is an antifreeze circulating pump, 26 is an antifreeze expansion tank, and 27 is a heating user heat dissipation system.

Description of the embodiments

Referring to fig. 1, the polyethylene pipe collector multi-source heat pump heating apparatus of the present embodiment includes a collector 10 and a heat pump unit, wherein: the polyethylene pipe is called PE pipe for short, and the heat pump unit mainly comprises an evaporator 21, a compressor 22, a condenser 23 and an expansion valve 24. The evaporator 21 is essentially a heat exchanger, the primary side of which is coupled to the PE pipe heat collector 10 by an antifreeze circulation pump 25, the PE pipe heat collector outlet 14 is coupled to the evaporator 21 primary side inlet, the evaporator 21 primary side outlet is coupled to the antifreeze circulation pump 25 inlet, the antifreeze circulation pump 25 outlet is coupled to the PE pipe heat collector inlet 13, the PE pipe heat collector 10, the evaporator 21 primary side and the antifreeze circulation pump 25 form a complete cycle by antifreeze heat transfer medium, the antifreeze circulation direction is marked with arrows in fig. 1, and the PE pipe heat collector 10 absorbs heat energy from solar energy, air energy by the circulation of antifreeze to the evaporator 21. The evaporator 21, the compressor 22, the condenser 23 and the expansion valve 24 are circulated through a refrigerant, the heat energy of the PE pipe heat collector 10 absorbed by the evaporator 21 is transferred to the condenser 23, the secondary side inlet of the evaporator 21 is a liquid refrigerant, the heat energy of the PE pipe heat collector 10 transferred from the primary side of the evaporator 21 is absorbed and then is changed into a gaseous refrigerant, the gaseous refrigerant is output to the inlet of the compressor 22 from the secondary side of the evaporator 21, the evaporation temperature of the refrigerant of the evaporator 21 is in the range of 15-35 ℃, and the gaseous refrigerant output by the evaporator 21 is in a low-temperature low-pressure state; the compressor 22 compresses the gaseous refrigerant with the inlet in a low-temperature and low-pressure state into a high-temperature and high-pressure gaseous refrigerant, the temperature is in the range of 35-65 ℃, and the high-temperature and high-pressure gaseous refrigerant is output from the outlet of the compressor 22 to the primary side inlet of the condenser 23; the condenser 23 is a heat exchanger in nature, the heat energy of the refrigerant on the primary side of the condenser 23 is transferred to the secondary side of the condenser, the refrigerant is changed from a gaseous state to a liquid state in the condenser 23, the secondary side of the condenser 23 is connected with the heating user heat dissipation system 27, and the heat energy of the refrigerant of the condenser 23 is transferred to the heating user heat dissipation system 27; the primary side liquid refrigerant of the condenser 23 is output from the outlet of the condenser 23 to the inlet of the expansion valve 24, and the refrigerant is output from the outlet of the expansion valve 24 to the inlet of the evaporator 21; the refrigerant forms a complete cycle in the evaporator 21, the compressor 22, the condenser 23 and the expansion valve 24 which are main components of the heat pump unit, and the energy from solar energy and air energy absorbed by the PE pipe heat collector 10 is finally transmitted to a heating user.

Referring to fig. 2, 3 and 4, a PE pipe collector 10 is formed by using a polyethylene plastic pipe (hereinafter referred to as PE pipe), the solar energy and air energy main absorption surface is formed by connecting a plurality of fine PE pipes 12 in parallel, two ends of the plurality of fine PE pipes 12 connected in parallel are respectively connected to a thick PE pipe 11, the thick PE pipe 11 can absorb solar energy and air energy, the solar energy and air energy absorption surface of the thick PE pipe 11 is a secondary solar energy and air energy absorption surface, the plurality of fine PE pipes 12 connected in parallel and the thick PE pipes 11 connected with the two ends thereof respectively form the PE pipe collector 10 together, antifreeze fluid is filled in the PE pipe collector 10 as a heat transfer medium of the PE pipe collector 10, and the PE pipe collector 10 is provided with a heat transfer medium outlet 14 and an inlet 13. The fine PE pipe 12 and the coarse PE pipe 11 are not provided with fins.

Referring to fig. 1, the antifreeze circulation system is provided with an antifreeze expansion tank 26, the antifreeze expansion tank 26 is coupled to an inlet of an antifreeze circulation pump 25, and the antifreeze expansion tank 26 is opened to eliminate stress of antifreeze due to expansion with heat and contraction with cold to the antifreeze circulation system, the antifreeze circulation system is an opening system, the pipe wall thickness of the thin PE pipe 12 and the thick PE pipe 11 is 0.1-1 mm, and the strength is enough to bear the pressure of the antifreeze circulation opening system. The PE tube heat collector 10 is used for replacing an aluminum calandria heat collector, so that the cost of the heat collector is greatly reduced.

Referring to fig. 1, in the multi-source heat pump heating device for a PE pipe heat collector according to the present embodiment, in addition to heating using solar energy and air energy, if the temperature of a surrounding building or the ground is higher than that of the PE pipe heat collector 10, the PE pipe heat collector 10 can absorb the energy of the surrounding building or the ground radiated to the PE pipe heat collector 10, and this energy is referred to as environmental energy, and at this time, the PE pipe heat collector 10 can absorb the solar energy, the air energy and the environmental energy simultaneously.

Referring to fig. 2, 3 and 4, the thin PE pipe and the thick PE pipe are common black PE pipes, which reduces the solar radiation reflectivity of the PE pipe heat collector 10, improves the heat collection efficiency of the PE pipe heat collector 10, and finally improves the energy efficiency of the multi-source heat pump heating device of the PE pipe heat collector of the embodiment.

The PE pipe of the embodiment has corrosion resistance, high strength and ageing resistance, does not have electrolytic corrosion phenomenon, and prolongs the service life of the heat collector.

In the present utility model, the thermal conductivity of polyethylene Plastic (PE) is about 0.42 w/(m×k). Compared with an aluminum calandria collector, at 20 ℃, the heat conductivity of pure aluminum is as follows: 237W/(m×k); thermal conductivity of aluminum alloy 1070: 236W/(m×k); thermal conductivity of aluminum alloy 1050: 231W/(m×k); aluminum alloy 6063 coefficient of thermal conductivity: 201W/(m x k). Therefore, the heat conductivity of pure aluminum and aluminum alloy is 500 times greater than that of PE, the row (fin) width of the aluminum calandria is 6 cm, and the fin width of the PE pipe is below 0.1 mm under the condition of the same fin heat resistance, so that the PE pipe is meaningless, and the PE pipe is not provided with fins.

The thickness of the aluminum calandria fin is 0.5 mm, the heat transfer area of the aluminum calandria fin with the length of 1 meter is only 500 square mm, and the average heat transfer distance of the aluminum calandria fin with the width of 6 cm is 3 cm; the utility model replaces aluminum calandria fins with a plurality of thin PE pipes, the heat transfer area of the plurality of thin PE pipes with the length of 1 meter and the width of 6 cm is about 6 ten thousand square millimeters, and the heat transfer area of the plurality of thin PE pipes with the length of 1 meter is greatly improved by 120 times compared with the heat transfer area of the aluminum calandria fins; the heat transfer distance of the PE pipe is the wall thickness of the pipe, the wall thickness of the PE pipe is 0.1-1 mm, and the heat transfer distance of the PE pipe is 300-30 times lower than that of the aluminum calandria fin. Therefore, the thermal resistance of the PE pipe heat collector is equivalent to that of an aluminum calandria heat collector, and the PE pipe heat collector can completely replace the aluminum calandria heat collector, so that the cost of the heat collector is greatly reduced.

Claims (3)

1. A polyethylene pipe heat collector multi-source heat pump heating device comprises a heat collector and a heat pump unit and is characterized in that: the solar energy and air energy main absorption surface of the heat collector is formed by connecting a plurality of thin polyethylene pipes in parallel, two ends of the parallel thin polyethylene pipes are respectively connected to a thick polyethylene pipe, the thick polyethylene pipes can also absorb solar energy and air energy, the solar energy and air energy absorption surface of the thick polyethylene pipe is a secondary solar energy and air energy absorption surface, antifreeze fluid is filled into the polyethylene pipes of the heat collector to serve as heat transfer medium of the heat collector, and the heat collector is provided with a heat transfer medium outlet and inlet; the wall thickness of all the polyethylene pipes forming the heat collector is 0.1-1 mm; the heat pump unit comprises an evaporator, a compressor, a condenser and an expansion valve, wherein the primary side of the evaporator is connected with the heat collector through an antifreeze circulating pump, and the heat collector, the primary side of the evaporator and the antifreeze circulating pump form complete circulation through an antifreeze heat transfer medium so as to transfer heat energy absorbed by the heat collector to the evaporator; the evaporator secondary side, the compressor, the condenser primary side and the expansion valve form a complete cycle through the refrigerant, heat energy is transferred to the condenser, and heat energy absorbed by the condenser is transferred to a heating user.

2. The polyethylene pipe heat collector multi-source heat pump heating apparatus as claimed in claim 1, wherein: the polyethylene pipe of the heat collector is not provided with fins.

3. The polyethylene pipe heat collector multi-source heat pump heating apparatus as claimed in claim 1, wherein: the polyethylene pipe forming the heat collector is a black polyethylene pipe.