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Heat pump system, control method and heat pump drying device

A technology of heat pump system and control method, which is applied in the direction of drying gas arrangement, refrigeration and liquefaction, local stirring dryer, etc., can solve the problems such as inability to dry, achieve the effect of improving energy efficiency, avoiding the slow heating process, and ensuring the continuous heating process

Active Publication Date: 2019-05-10
GREE ELECTRIC APPLIANCES INC
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  • Abstract
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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the heat pump drying system in the prior art that the heat pump drying system cannot dry for different drying room temperatures while ensuring the efficient operation of the system, thereby providing a heat pump system , control method and heat pump drying device

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  • Heat pump system, control method and heat pump drying device
  • Heat pump system, control method and heat pump drying device

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Embodiment Construction

[0051] Such as Figure 1-2 As shown, the present invention provides a heat pump system that can be used to dry materials in a drying room, which includes:

[0052] The first refrigeration cycle system includes a first compressor 101, a first condenser 121, a first evaporator 132, and a heat exchanger 131, and the heat exchanger 131 is arranged in parallel at both ends of the first evaporator 132, The first refrigeration cycle system is filled with a first refrigerant;

[0053] The second refrigeration cycle system includes a second compressor 201, a second condenser 221, a second evaporator 231, and the heat exchanger 131, and the heat exchanger 131 is arranged in parallel on both ends of the second condenser 221. end, and the first refrigerating cycle system and the second refrigerating cycle system exchange heat through the heat exchanger 131, the second refrigerating cycle system is filled with the second refrigerant, and the first refrigerating cycle system The boiling p...

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Abstract

The invention provides a heat pump system, a control method and a heat pump drying device. The heat pump system comprises a first refrigeration circulating system and a second refrigeration circulating system. The first refrigeration circulating system can be independently switched on when the temperature T<in> in a drying room is higher than T1, and the second refrigeration circulating system canbe switched off at the moment. The second refrigeration circulating system can be independently switched on when the temperature T<in> in the drying room is smaller than a T2, and the first refrigeration circulating system can be switched off at the moment. The first refrigeration circulating system and the second refrigeration circulating system can be simultaneously switched on when the temperature in the drying room T<in> meets T2<=T<in><=T1, wherein T1 is larger than T2. By the adoption of the heat pump system, through switching between single-stage heat pump circulation and cascade heatpump circulation and combination of open type heating and a closed type dehumidification mode, efficient operation of the heat pump in the full drying process is achieved.

Description

technical field [0001] The invention belongs to the technical field of heat pumps, and in particular relates to a heat pump system, a control method and a heat pump drying device. Background technique [0002] When using heat pump technology for material drying, if the drying temperature is higher than 80°C, conventional air source heat pumps (except CO2 heat pumps) cannot achieve high-efficiency operation under high temperature rise. At this time, cascade cycles or multi-stage compression cycles are generally used. The cascade heat pump connects the two heat pump systems through the condensing evaporator. While meeting the demand for high heating temperature under the condition of large temperature rise, it also solves the problems of system design difficulties and compressor oil equalization problems that may exist in multi-stage compression. Patent CN103940156B provides a control method for a cascade heat pump drying system, which determines the system operation mode by d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B7/00F25B5/02F25B6/02F25B41/04F25B41/06F25B47/02F26B9/02F26B21/00F26B21/04F26B21/08F26B21/10F25B41/20F25B41/30
CPCY02P70/10
Inventor 郑波吕如兵汤康梁祥飞庄嵘
Owner GREE ELECTRIC APPLIANCES INC
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