Ground source heat pump system for heating with heating device and variable frequency pump

Abstract

The invention discloses a heating ground source heat pump system with a heating device and variable frequency pumps. A user heating pipeline circulation system of the heating ground source heat pump system comprises a fourth heat exchange coil (3), a second water outlet pipe (4), a floor heating pipe (5), a second water return pipe (6) and a fifth heat exchange coil (9), wherein an outlet of the second water outlet pipe (4), an inlet of the fifth heat exchange coil (9) and an inlet of the floor heating pipe (5) are communicated through a three-way valve (7); an inlet of the second water return pipe (6), an outlet of the fifth heat exchange coil (9) and an outlet of the floor heating pipe (5) are communicated through another three-way valve (7); the second water outlet pipe (4) is connected in series with a second variable frequency pump (19); a first water outlet pipe (16) is connected in series with a first variable frequency pump (20); and the second water outlet pipe (4) is provided with an electrical heating wire (21) with power of 9 kw. The system can meet the requirements for building heating and hot water for life of people, high-voltage faults can be prevented, and the requirements for heating of users can still be met under a low-temperature environment.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to a ground source heat pump system for heating with a heating device and a frequency conversion pump. Background technique [0002] The ground source heat pump system refers to an air conditioning system that absorbs heat or cold from ground sources such as soil and groundwater, and uses the heat pump principle to transfer heat or cold to places where it is needed, such as target buildings. Ground source heat pumps can both cool and heat. Generally, heat is transferred from the ground source to the building in winter, and cold energy is transferred from the ground source to the building in summer. What the present invention relates to is a ground source heat pump system in winter heating mode. Since the average temperature of the soil in winter is about 17 degrees higher than that of the air, it is an excellent heat source for heat pumps. This temperature characteristic makes its t...

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Problems solved by technology

[0007] However, the ground source heat pump system for heating in the prior art has the following defects: firstly, the heating method is relatively simple, and can only provide heating to the building through the floor heating pipe, which cannot meet the needs of people's daily use of hot water; secondly, in the ground source In the heat-absorbing pipeline circulation system and the user heating pipeline circulation system, the heat transfer of the system is adjusted by adjusting the opening of the flow regulating valve, but in actual use, it is necessary to reduce the heat transfer and adjust the opening of the valve body When it reaches the minimum, the pressure in the system is too high, which is prone to high-pressure failure. In the severe cold winter, when the heating capacity required by the user is particularly large, although the opening of the valve body has been adjusted to the maximum to maximize the flow, it still cannot meet the requirements of the system. The demand for heat leads to insufficient heating; again, the ground source heat pump unit is installed in the air conditioner shell, and it is very inconvenient to disassemble the shell every time it needs maintenance

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