Heat exchange unit combined with direct connection heating manner

Abstract

The invention discloses a heat exchange unit combined with a direct connection heating manner. The heat exchange unit is mainly composed of a plate type heat exchanger, a water filling variable frequency pump, a circulating pump, an indoor temperature sensor and a control cabinet. A first-time side connector of the plate type heat exchanger is connected with a first-time water supply pipe and a first-time water returning pipe, and a second-time side connector of the plate type heat exchanger is connected with a heating water supply pipe and a heating water returning pipe; a first electromagnetic valve is mounted on the heating water supply pipe, and a direct connection water supply pipe is arranged at the position, behind the first electromagnetic valve, of the heating water supply pipe and is connected with the first-time water supply pipe; a direct connection water returning pipe is arranged on the first-time water returning pipe and is connected with the heating water returning pipe, and a fourth electromagnetic valve is arranged on the direct connection water returning pipe; and a water filling pipe is arranged in a manner of winding around the fourth electromagnetic valve and is connected with the direct connection water returning pipe. The heat exchange unit has the beneficial effects that advantages of heat exchange heating and direct connection heating are combined, heating safety is improved, the heating effect is ensured, the energy-saving and emission reduction are facilitated, and the heat exchange unit is small in land occupation, low in heating cost and flexible in use, saves investment, and has the good economic benefits and application and popularization value.

Description

technical field [0001] The invention relates to the technical field of heating, in particular to a heat exchange unit with direct connection heating mode. Background technique [0002] The conventional heating system is divided into heat exchange heating system and direct connection heating system. The heat exchange heating system is a heating system with a heat exchange unit, while the direct connection heating system uses an outdoor heat pipe network to directly pressurize heating without a heat exchange unit. Therefore, the temperature of the heat exchange heating system can be controlled and adjusted, which is conducive to automatic unattended control, but when the temperature difference between the primary side and the secondary side of the heat exchange unit is required to be small, such as the primary When the side water supply temperature is 50°C-70°C and the secondary side water supply temperature is required to be 50°C-60°C, the use of heat exchange units for heati...

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Problems solved by technology

[0002] The conventional heating system is divided into heat exchange heating system and direct connection heating system. The heat exchange heating system is a heating system with a heat exchange unit, while the direct connection heating system uses an outdoor heat pipe network to directly pressurize heating without a heat exchange unit. Therefore, the temperature of the heat exchange heating system can be controlled and adjusted, which is conducive to automatic unattended control, but when the water supply temperature difference between the primary side and the secondary side of the heat exchange unit is required to be small, such as the primary When the side water supply temperature is 50°C-70°C and the secondary side water supply temperature is required to be 50°C-60°C, the use of heat exchange units for heating will result in large selection of plate heat exchangers, high investment, and disadvantages for energy saving; and The direct-connected heating system has the characteristics of high heating efficiency and no heat energy loss of the heat exchange unit, but the heating temperature is not easy to control

At present, the heating system on the market often only adopts one of the heat exchange unit or the direct connection unit, and there is almost no case where heat exchange and direct connection are used at the same time. However, in actual engineering applications, the process parameters of the outdoor heat pipe network often appear. It is not completely consistent with the design parameters. When the heat exchange unit or direct-connected unit is considered separately, it often occurs that the heating is not hot and the user complains due to the inconsistency with the design parameters, and it is inconvenient to rectify later.

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