Building internal thermal energy circulation utilizing system integrated energy-saving device

Abstract

The invention discloses an integrated energy-saving device for a heat energy recycling system in a building, which includes frequency conversion and speed regulation intelligent control equipment, central air-conditioning system equipment, a plate heat exchanger and a heat pump unit, wherein: the primary side of the plate heat exchanger (26) The water inlet end is connected in parallel with the water inlet end of the primary side of the heat pump unit (12), and then connected to the cooling water outlet pipeline (38) through the primary water inlet electric valve (15) of the heat pump unit, and the primary side of the plate heat exchanger (26) The water outlet is connected in parallel with the primary water outlet of the heat pump unit (12), and then connected to the cooling water inlet pipeline (37) through the heat pump unit’s primary water outlet electric valve (13); The relevant sensors of the main engine (2) are connected with the relevant working pumps and standby pumps of the air conditioner main engine (2) at the output end. It can upgrade the low-level heat energy of cooling water, reclaimed water, and fire-fighting water in buildings to higher-level heat energy, transfer and utilize this heat energy, and directly produce sanitary hot water for users.

Description

technical field [0001] The invention relates to an energy-saving device, in particular to an energy-saving device integrated with a thermal energy recycling system in a building. Background technique [0002] Central air-conditioning systems are commonly used in modern buildings. Most central air-conditioning systems have not taken technical measures to solve the problem of energy saving and consumption reduction. As long as the air-conditioning host is started, the water pump and fan will run at 50Hz, which cannot follow the change of air-conditioning load. The operating frequency of the water pump and fan cannot be changed, which wastes a lot of electric energy, aggravates the wear of the water pump and fan, produces strong noise, and disturbs the surrounding environment. When the air conditioner is running in the cooling state, a large amount of heat in the air conditioning area and the air conditioner is taken out by the cooling water, and the cooling water with an outle...

AI Technical Summary

Problems solved by technology

[0002] Central air-conditioning systems are commonly used in modern buildings. Most central air-conditioning systems have not taken technical measures to solve the problem of energy saving and consumption reduction. As long as the air-conditioning host is started, the water pump and fan will run at 50Hz, which cannot follow the change of air-conditioning load. The operating frequency of the water pump and fan cannot be changed, which wastes a lot of electric energy, increases the wear of the water pump and fan, produces strong noise, and disturbs the surrounding environment

When the air conditioner is running in the cooling state, a large amount of heat in the air conditioning area and the air conditioner is taken out by the cooling water, and the cooling water with an outlet temperature of 37°C is blown by the cooling tower fan to cool down, and the heat is discharged by evaporating a part of the cooling water. into the atmosphere to form cooling water with an inlet temperature of 32°C. This disposal method not only consumes electricity and water resources, but also wastes heat energy that can be used. ecological environment

[0003] At present, many central air-conditioning systems use absorption cold and warm water units. Although they have the functions of cooling, heating and producing sanitary hot water, the cost of producing sanitary hot water is too high, and a large amount of gas is consumed, which cannot be operated economically.

At the same time, most of the sanitary hot water necessary for urban residents is produced by heating tap water with fuel oil, gas, etc. Combustion heating consumes primary energy and emits a large amount of CO 2 and other greenhouse gases

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