Heating system and control method thereof

Abstract

The invention provides a heating system and a control method thereof. The heating system comprises a heat pump unit, and a heating terminal arranged in a room. The heating terminal is connected with the heat pump unit through a water pipe. The heat pump unit comprises a controller. The output end of the controller is electrically connected with a compressor. The input end of the controller is electrically connected with a temperature controller. The temperature controller is arranged in the room. The temperature controller collects the temperature in the room to generate a temperature signal through calculation, the temperature signal is transmitted to the controller, and the controller controls the operation frequency of the compressor so as to control the water temperature in the water pipe. The control method of the heating system is based on the heating system. The indoor temperature collection is regarded as the control target, the supply water temperature is further controlled, the situation of disproportion of room loads and water temperature changes is avoided, and thus the user operation control cost is reduced.

Description

technical field [0001] The invention belongs to the field of heating, in particular to a heating system for adjusting the temperature of water supply through indoor temperature. Background technique [0002] In recent years, with the transformation of coal-fired boilers in rural areas, the use of clean energy, including air energy heat pumps to provide heat sources, aims to solve the problem of environmental pollution that has plagued many years. However, through the above-mentioned transformation, the cost of operating expenses has been increased, which is mainly caused by the following problems: [0003] (1) The control target of the heat pump unit is the water temperature, not the room temperature, which will cause asymmetry in the room load and water temperature changes, which will increase the operating costs of the control users. [0004] (2) 90% of the heating terminals used in rural areas are radiators, and the heat transfer mode of radiators is natural convection a...

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Problems solved by technology

[0003] (1) The control target of the heat pump unit is the water temperature, not the room temperature, which will cause the asymmetry of the room load and water temperature changes, which in turn will increase the operating costs of the control users

[0004] (2) 90% of the heating terminals used in rural areas are radiators, and the heat transfer mode of radiators is natural convection and radiation, which has a small heat transfer coefficient; at the same time, due to heating renovation, the temperature of supply and return water is changed from 60 to 80°C to 40°C ~50°C, and the number of heating terminals will basically not increase, resulting in a small heat dissipation area of ​​the radiator and a slow change in water temperature; the other 10% of the heating terminals adopt the form of floor heating coils and fan coils: the heat transfer method of floor heating coils For radiation and natural convection, the heat transfer coefficient is also small, but because of the large heat transfer area, the change of water temperature is in the middle; while the main heat transfer mode of fan coil is forced convection, the heat transfer coefficient is relatively large, although the heat transfer area is small, However, the overall value of AK (where A represents the heat transfer area and K represents the heat transfer coefficient) is relatively large, and changes the water temperature the fastest. If the same set of parameters is used to control, it will easily cause the compressor to stop, and the start-up time will not change with the room temperature. match

However, because the heat transfer ends of different water systems have different AK values, using the same parameter control system for control will cause overshoot or fluctuations, which will affect the user's use effect

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