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Two-pipe heat recovery multi-connection system and its air conditioner outdoor unit
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An air conditioner outdoor unit, multi-connection system technology, applied in refrigerators, compressors, mechanical equipment, etc., can solve the problems of insufficient heating capacity, low pressure, low ambient temperature, etc.
Active Publication Date: 2021-05-04
GD MIDEA HEATING & VENTILATING EQUIP CO LTD +1
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Problems solved by technology
[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 and 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 cooper...
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-pipe heat recovery multi-connection system and an air conditioner outdoor unit thereof. The air conditioner outdoor unit includes: a main circulation flow path and an air injection enthalpy increase flow path. The main circulation flow path includes an air injection enthalpy increasing compressor, a reversing device and an outdoor heat exchanger connected by pipelines, and its two ends are respectively connected with the inlet and outlet of the refrigerant distribution device through the refrigerant output pipe and the refrigerant input pipe; The enthalpy-increasing flow path includes a flash evaporator and an outdoor throttling device. The inlet of the flash evaporator is connected to the refrigerant input pipe through the first pipeline, and the outlet on the gas side is connected to the gas injection port of the air-jet enthalpy increasing compressor through the second pipeline. The outlet is connected to the input end of the outdoor heat exchanger through the third pipeline, and the outdoor throttling device is arranged on the third pipeline. In the present invention, by using the air injection enthalpy increasing compressor technology and adding a flash evaporator and an outdoor throttling device, the two-pipe heat recovery multi-line system adds the function of heating air injection enthalpy increasing, thereby significantly improving the low temperature heating capacity and cooling capacity of the system. heat effect.
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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