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A gas heat pump air conditioner heat recovery system and its control method

A gas heat pump and heat recovery technology, applied in heat recovery systems, air conditioning systems, heating methods, etc., can solve the problems of unreasonable air source gas heat pump flue gas heat recovery, drastic fluctuations in cooling water temperature, and frequent switching of control units. Achieve the effect of solving severe temperature fluctuations, improving heat recovery rate, and increasing heat recovery

Active Publication Date: 2022-04-26
中科广能能源研究院(重庆)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above problems, the present invention proposes a gas heat pump air-conditioning heat recovery system and its control method, which mainly solves the problems of unreasonable air source gas heat pump flue gas heat recovery, severe fluctuations in cooling water temperature, and frequent switching of control units

Method used

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  • A gas heat pump air conditioner heat recovery system and its control method
  • A gas heat pump air conditioner heat recovery system and its control method
  • A gas heat pump air conditioner heat recovery system and its control method

Examples

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Embodiment 1

[0026] Such as figure 1 As shown, this embodiment proposes a gas heat pump air-conditioning heat recovery system, including a flue gas discharge system, a refrigerant system, a cooling water system and a domestic hot water system;

[0027] The flue gas discharge system includes the exhaust end of the gas engine 1, the heat medium passage of the first flue gas heat exchanger 2, the muffler 3, the heat medium passage of the second flue gas heat exchanger 4, and post-processing equipment 5, which are connected in sequence, The cold medium channel of the second flue gas heat exchanger 4 is connected to any pipeline of the domestic hot water system;

[0028] The cooling water system is used to collect the waste heat of the cylinder liner 6 of the gas engine 1 and the waste heat of the primary flue gas, and the water output end of the cylinder liner 6 is connected to the cold medium channel of the first flue gas heat exchanger 2;

[0029]The refrigerant system includes a compressor...

Embodiment 2

[0037] Such as figure 2 As shown, on the basis of Embodiment 1, due to structural design restrictions or cost considerations, the third solenoid valve 13 can be eliminated, and the first heat recovery device 9 can be placed before the buffer water tank.

Embodiment 3

[0039] A heat recovery control method for a gas-fired heat pump air conditioner, which is used in the heat recovery system for a gas-fired heat pump air-conditioner described in Embodiment 1, including a cooling and heating mode, a first heating mode, a second heating mode, and a third heating mode. The above-mentioned cooling and heating mode is used for refrigeration or multi-connected high-temperature heating. According to the heat transfer capacity of the refrigeration cycle, the heat transfer capacity of the first heat recovery device 9 and the outdoor radiator 15 are respectively used as evaporators of the cooling water system. If the second If the heat exchange capacity of a heat recovery device 9 is stronger than that of the outdoor radiator 15, the first heating mode is selected; otherwise, the second heating mode is selected. The first heating mode is used for multi-connected systems or the third heat recovery device is not activated 17 cold and hot water units for he...

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Abstract

The invention discloses a gas-fired heat pump air-conditioning heat recovery system and a control method thereof, which include a smoke discharge system, a refrigerant system, a cooling water system and a domestic hot water system; the smoke discharge system includes an exhaust end of a gas engine connected in sequence, a first The heat medium channel of the first flue gas heat exchanger, the muffler, the heat medium channel of the second flue gas heat exchanger, and the post-processing equipment, the cold medium channel of the second flue gas heat exchanger is connected to the pipeline of the domestic hot water system; cooling The water system is used to collect the waste heat of the cylinder liner of the gas engine, and the water output end of the cylinder liner is connected to the cold medium channel of the first flue gas heat exchanger; the refrigerant system includes a compressor connected to the power output end of the gas engine, and the compressor The refrigerant output end is connected to the heat medium channel of the second heat recovery device. The invention solves the problem of severe temperature fluctuation of cooling water by optimizing the distribution mode of engine waste heat recovery, improving the heat recovery rate, improving the stability of the heat recovery system and reducing the frequent switching of control units.

Description

technical field [0001] The invention relates to the field of gas-driven air source heat pump air conditioners, in particular to a gas heat pump air conditioner heat recovery system and a control method thereof. Background technique [0002] The gas heat pump is an air source heat pump that uses a gas engine to drive a refrigerant compressor to operate to realize a vapor compression refrigeration cycle. An important reason for the high efficiency of gas heat pump air conditioners is that the waste heat can be recycled, and the waste heat of the engine can be divided into the waste heat of the engine cylinder liner and the waste heat of the exhaust gas. The optimal control of the gas heat pump waste heat utilization method can not only effectively improve the overall thermal performance of the unit, but also the key to ensure the safe and stable operation of the engine. However, the traditional waste heat utilization currently has the following problems: [0003] 1) At prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B13/00F25B41/20F25B49/02F24F5/00F24F11/41F24F11/61F24F11/64F24F11/65F24F11/84F24F11/88F24F140/20
CPCF25B13/00F25B49/02F24F5/001F24F11/41F24F11/61F24F11/64F24F11/65F24F11/84F24F11/88F24F2140/20Y02B30/52
Inventor 张建鹏冯自平
Owner 中科广能能源研究院(重庆)有限公司