Two-tube heat recovery multi-split system and air conditioning outdoor unit thereof
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A technology for outdoor units of air conditioners and multi-connection systems, which is applied in refrigerators, compressors, refrigeration components, etc., can solve the problems of small refrigerant circulation, insufficient heating capacity, and low return air density, and achieves increased refrigerant circulation. The effect of improving heating effect and improving comfort
Active Publication Date: 2019-02-26
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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[0002] At present, the existing two-pipe heat recovery multi-connected system does not have a low-temperature and strong-heating model. In a low-temperature environment, because of low ambient temperature, low pressure, low return air density, and small refrigerant circulation volume, there is a problem of insufficient heating capacity. question
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Embodiment 1
[0075] The second pipeline 402 is provided with a first control valve 208 capable of controlling its on-off, such as figure 1 with figure 2 shown.
[0076] The first control valve 208 is set on the second pipeline 402, and the first control valve 208 can control the on-off of the second pipeline 402, so as to realize the selective on-off of the second pipeline 402. In this way, in cooling operation and other systems When there is no need for enthalpy injection and supplementary air, the second pipeline 402 can be disconnected through the first control valve 208 to prevent other functions of the system (such as pure cooling mode, main cooling mode, etc.) from being affected, thus improving the system efficiency. reliability.
[0077] Preferably, the first control valve 208 is a solenoid valve.
[0078] Using the solenoid valve as the first control valve 208 can not only effectively control the on-off of the second pipeline 402, but also facilitate automatic control in coope...
Embodiment 2
[0099] The difference from Embodiment 1 is that the outdoor throttling device 60 includes multiple throttling elements connected in parallel.
Embodiment 3
[0101] The difference from Embodiment 1 is that the outdoor throttling device 60 includes at least one throttling element and a flow diversion solenoid valve, and the at least one throttling element and the flow diversion solenoid valve are connected in parallel.
[0102] The outdoor throttling device 60 mainly performs the function of throttling and reducing pressure, and its specific form is not limited. For example: it can include only one throttling element, or it can include multiple throttling elements connected in parallel, or it can be a throttling element and a shunt solenoid valve (that is, a solenoid valve that acts as a shunt to prevent all refrigerant from entering the throttling Components) parallel combination, etc., can also be other forms; and the form of the throttling element is not limited, such as capillary, electronic expansion valve 92, etc., are not listed here, because all can achieve throttling reduction Pressure function, and do not deviate from the ...
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Abstract
The invention provides a two-tube heat recovery multi-split system and an air conditioning outdoor unit thereof. The air conditioning outdoor unit comprises a main circulation flow path and an enhanced-vapor injection flow path. The main circulation flow path comprises an enhanced-vapor injection compressor, a reversing device and an outdoor heat exchanger which are connected through pipelines, and two ends of the main circulation flow path are respectively communicated with an inlet and outlet of a refrigerant distribution device through a refrigerant output pipe and a refrigerant input pipe.The enhanced-vapor injection flow path comprises a flash evaporator and an outdoor throttling device, wherein the inlet of the flash evaporator is communicated with the refrigerant input pipe througha first pipeline, an air side outlet is connected with an air injection port of the enhanced-vapor injection compressor through a second pipeline, a liquid side outlet is connected with an input endof the outdoor heat exchanger through a third pipeline, and the outdoor throttling device is arranged on the third pipeline. By the adoption of the two-tube heat recovery multi-split system and the air conditioning outdoor unit thereof, the enhanced-vapor injection compressor technology is used and the flash evaporator and the outdoor throttling device are added, so that the two-tube heat recoverymulti-split system has a function of enhanced-vapor injection by heating, thereby obviously improving the low-temperature heating capacity and heating effect of the system.
Description
technical field [0001] The invention relates to the technical field of air conditioning, in particular to a two-pipe heat recovery multi-connection system and an air conditioner outdoor unit thereof. Background technique [0002] At present, the existing two-pipe heat recovery multi-connection system does not have a low-temperature and strong-heating model. In a low-temperature environment, low pressure due to low ambient temperature, low return air density, and small refrigerant circulation volume lead to insufficient heating capacity. question. Contents of the invention [0003] In order to solve at least one of the above technical problems, an object of the present invention is to provide an air conditioner outdoor unit for a two-pipe heat recovery multi-connected system. [0004] Another object of the present invention is to provide a two-pipe heat recovery multi-connection system comprising the above air conditioner outdoor unit. [0005] In order to achieve the abo...
Claims
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