Outdoor parallel flow heat exchanger for heat pump air conditioner

Abstract

The invention discloses an outdoor parallel flow heat exchanger for a heat pump air conditioner. The outdoor parallel flow heat exchanger comprises a blocking piece (6), a first flow guide separationpiece (8) and a second flow guide separation piece (9), a hole penetrating separation piece (10) is inserted into an upper flow collecting pipe (7), and the first flow guide separation piece (8), thesecond flow guide separation piece (9) and the blocking piece (6) are sequentially inserted into a lower flow collecting pipe (1); the upper flow collecting pipe (7) and the lower flow collecting pipe(1) which are assembled are placed on the left side and the right side of a core assembling machine correspondingly, then a protecting plate (5), a fin (3) and a multi-channel flat pipe (2) are arranged on the core assembling machine in sequence, the multi-channel flat pipe (2) is inserted into the upper flow collecting pipe (7) and the lower flow collecting pipe (1) through the core assembling machine, and moreover, an inlet pipe (11) and an outlet pipe (4) are fixed on a core body through spot welding. According to the outdoor parallel flow heat exchanger, the flow guide separation pieces are adopted, so that flowing of a refrigerant is uniform, and then the heat exchange efficiency is improved; due to the adoption of the non-open-window fin, when the parallel flow heat exchanger reflects the function of an evaporator, frosting is not prone to occurrence, and then the heat exchange efficiency is improved.

Description

technical field [0001] The invention relates to the field of application and technical field of heat pump systems for vehicles and household air conditioners. The outdoor parallel flow heat exchanger has two vertical flows and a roughly symmetrical structure, which can be used not only as a condenser but also as an evaporator. In addition, this product also has the characteristics of high compressive strength and light weight, and it can be used in a wide range of applications. Background technique [0002] In the heat pump system currently used in household air conditioners (for the principle, see figure 2 ), the evaporator and condenser both adopt the tube-fin structure, relying on the reversing adjustment of the four-way valve in the system, the refrigerant flow direction of the evaporator-condenser and evaporator-condenser is reversed, corresponding to the refrigeration function and Heating function. However, the condenser and evaporator of the tube-fin structure have ...

AI Technical Summary

Problems solved by technology

However, the condenser and evaporator of the tube-fin structure have the following defects: low heat exchange efficiency, heavy weight, and large volume, and are not suitable for use in heat pump systems for new energy vehicle air conditioners

This product has the following defects: because there is no diversion spacer in the header, the refrigerant distribution is uneven, so the heat exchange efficiency is low, especially when used as an evaporator, the cooling performance is insufficient

Due to the poor performance of this product, the thickness design of the flat tube cannot reach the optimal size, which affects its compressive strength

The position of the inlet and outlet pipes of this product determines that its oil return effect is not good; it will not only affect the life of the compressor, but also reduce the cooling capacity of the system

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