Two-tube heat recovery multi-split system and air conditioning outdoor unit thereof
A technology of outdoor units and multi-connected systems of air conditioners, which is applied in the direction of refrigerators, compressors, refrigeration components, etc., can solve the problems of small refrigerant circulation, insufficient heating capacity, and low return air density, so as to increase the refrigerant circulation. Improved heating effect and improved comfort
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Embodiment 1
[0075] The fourth pipeline 404 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 fourth pipeline 404, and the first control valve 208 can control the on-off of the fourth pipeline 404, so as to realize the selective on-off of the fourth pipeline 404. In this way, in cooling operation and other systems When there is no need for enthalpy injection and supplementary air, the fourth pipeline 404 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, thereby 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 fourth pipeline 404, but also facilitate automatic control in coo...
Embodiment 2
[0099] The difference from Embodiment 1 is that: the outdoor main throttling device 61 and / or the outdoor auxiliary throttling device 62 include multiple throttling elements connected in parallel.
Embodiment 3
[0101] The difference with Embodiment 1 is:
[0102] The outdoor main throttling device 61 and / or the outdoor auxiliary throttling device 62 include at least one throttling element and a diverting solenoid valve, and at least one throttling element and the diverting solenoid valve are connected in parallel.
[0103] The outdoor main throttling device 61 and the outdoor auxiliary throttling device 62 mainly perform the function of throttling and reducing pressure, and their specific forms are 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 liste...
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