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Heat pump system and defrosting mode thereof

A heat pump system and heating mode technology, applied in heat pumps, lighting and heating equipment, damage protection, etc., can solve problems affecting thermal comfort and user experience, to ensure indoor ambient temperature, reduce impact, and improve thermal comfort. sexual effect

Inactive Publication Date: 2021-04-16
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Refrigeration cycle defrosting is to switch the system from heating cycle to refrigeration cycle through the four-way reversing valve during defrosting. During defrosting, the indoor heat exchanger acts as an evaporator, which will absorb heat from the room, which seriously affects the cooling cycle. Thermal comfort and user experience during frost

Method used

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  • Heat pump system and defrosting mode thereof
  • Heat pump system and defrosting mode thereof
  • Heat pump system and defrosting mode thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] refer to Figure 1 to Figure 3 , a heat pump system provided by the present invention includes a compressor 106, a four-way reversing valve 105, an indoor heat exchanger 101, an outdoor heat exchanger 108, and a bypass branch. The gas-liquid separator 111 is connected to an outdoor heat exchanger. The heat exchanger 108 and the indoor heat exchanger 101, the indoor heat exchanger 101 is provided with an auxiliary heating device 102 and an internal fan 103, and the internal fan 103 is used to drive the air flow around the indoor heat exchanger 101 and the auxiliary heating device 102, The outdoor heat exchanger 108 has an external fan 109 for driving the air flow around the outdoor heat exchanger 108. The compressor 106 is provided with an air supply port, a suction port and an exhaust port. The refrigerant entering the suction port is compressed, and the refrigerant is compressed to form a high-temperature and high-pressure gaseous refrigerant that is discharged from th...

Embodiment 2

[0050] refer to Figure 4 to Figure 6 , Figure 4 , Figure 5 , Figure 6 They are the system configuration diagram of the heat pump system, the system circulation diagram in the heating mode and the system circulation diagram in the defrosting mode. The defrosting control valve group in this embodiment is the first electromagnetic two-way valve set on the air supply section. 207 and the second electromagnetic two-way valve 208 arranged on the suction section. The difference between this embodiment and Embodiment 1 is that in this embodiment, two electromagnetic two-way valves are used instead of electromagnetic three-way valves. The connection and disconnection of the suction section and the air supply section of the bypass branch are controlled by the opening and closing of two electromagnetic two-way valves.

[0051] The outdoor throttling device 211 can be selected from throttling mechanisms such as capillary tubes, electronic expansion valves, and short throttle tubes,...

Embodiment 3

[0055] refer to Figure 7 to Figure 9 , Figure 7 , Figure 8 , Figure 9 They are the system configuration diagram of the heat pump system, the system circulation diagram in the heating mode and the system circulation diagram in the defrosting mode. The difference between this embodiment and Embodiment 1 is that the compressor 306 in this embodiment is not equipped Gas port, the compressor 306 only has an exhaust port and a suction port, the suction port of the compressor 306 is connected to the gas-liquid separator 310 through an outlet pipe, and the outlet pipe is only provided with a throttling device 313 and an electromagnetic two-way valve 307, The fourth valve port of the four-way reversing valve 305 communicates with the suction port of the compressor 306, and controls the communication between the compressor 306 and the bypass branch of the gas-liquid separator 310 through the opening and closing of an electromagnetic two-way valve 307 with disconnect.

[0056] Th...

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PUM

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Abstract

The invention relates to the field of air conditioner defrosting, in particular to a heat pump system and a defrosting method thereof. An outdoor heat exchanger and an indoor heat exchanger are connected to a gas-liquid separator, the indoor heat exchanger is provided with an auxiliary heating device and an inner fan, a compressor air supply port communicates with a compressor air suction port through a bypass branch, a defrosting control valve is arranged on the bypass branch, the gas-liquid separator is connected to an outlet pipe communicating with the bypass branch, a compressor exhaust port is connected to a four-way reversing valve used for switching between a heating mode and a defrosting mode, the four-way reversing valve comprises a first valve port communicating with the indoor heat exchanger, a second valve port communicating with the compressor exhaust port, a third valve port communicating with the outdoor heat exchanger and a fourth valve port communicating with the compressor air suction port. According to the heat pump system and the defrosting mode thereof, by designing the air conditioning system, heat can be continuously supplied to the indoor space in the defrosting period, indoor temperature fluctuation in the defrosting period can be reduced while the indoor comfort is guaranteed in the defrosting period, and the thermal comfort is improved.

Description

technical field [0001] The invention relates to the field of air-conditioning defrosting, in particular to a heat pump system and a defrosting method. Background technique [0002] In an outdoor low temperature environment, when the heat pump air conditioner is running in heating mode, the surface temperature of the outdoor heat exchanger is low. When it is lower than 0°C, the surface of the heat exchanger is prone to frost, which seriously affects the heating effect of the air conditioner. The defrosting method of the existing heat pump system is mainly refrigeration cycle defrosting. Refrigeration cycle defrosting is to switch the system from heating cycle to refrigeration cycle through the four-way reversing valve during defrosting. During defrosting, the indoor heat exchanger acts as an evaporator, which will absorb heat from the room, which seriously affects the cooling cycle. Thermal comfort and user experience during frosting. [0003] By designing an air conditioni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B30/02F25B41/20F25B41/30F25B47/02F25B49/02
Inventor 于琦彭光前车雯王锐锋王喜成王现林
Owner GREE ELECTRIC APPLIANCES INC