Refrigeration system and heat exchanger thereof

Patent metadata

Field	Value
Publication number	US-2016010905-A1
Application number	US-201514753127-A
Country	US
Kind code	A1
Filing date	Jun 29, 2015
Priority date	Jul 11, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

A refrigeration system and a heat exchanger are provided. The refrigeration system includes a compressor, a micro-channel condenser, a micro-channel evaporator and at least one throttling device which are connected by pipelines. Each of the micro-channel condenser and the micro-channel evaporator includes an inlet manifold and an outlet manifold, and a plurality of flat tubes being connected between the inlet manifold and the outlet manifold. The inlet manifold of the micro-channel evaporator is provided with a baffle, and the inlet manifold of the micro-channel evaporator is divided by the baffle into multiple manifold sections, and the manifold sections of the inlet manifold are isolated from each other by the baffle, and are each in communication with a certain number of the flat tubes, and are each not provided with a distribution pipe configured to distribute flow rate into the flat tubes in communication with the manifold sections.

First claim

1 . A refrigeration system, comprising a compressor, a micro-channel condenser, a micro-channel evaporator and at least one throttling device which are connected by pipelines, each of the micro-channel condenser and the micro-channel evaporator comprising an inlet manifold and an outlet manifold, a plurality of flat tubes being connected between the inlet manifold and the outlet manifold of the micro-channel condenser and in communication with the inlet manifold and the outlet manifold of the micro-channel condenser, and a plurality of flat tubes being connected between the inlet manifold and the outlet manifold of the micro-channel evaporator and in communication with the inlet manifold and the outlet manifold of the micro-channel evaporator; and
the throttling device is arranged at the pipeline between the micro-channel condenser and the micro-channel evaporator, the inlet manifold of the micro-channel evaporator is provided with at least one baffle, the number of the baffle is n and n is greater than or equal to one, and the inlet manifold of the micro-channel evaporator is divided by the n baffle into at least two manifold sections arranged in order, the number of the manifold sections of the micro-channel evaporator is (n+1), and the adjacent manifold sections of the inlet manifold of the micro-channel evaporator are isolated from each other by the baffle; each of the manifold sections of the inlet manifold of the micro-channel evaporator is in communication with a certain number of the flat tubes and is provided with at least one connecting port configured to be in communication with the respective pipeline, and each of the manifold sections of the inlet manifold of the micro-channel evaporator is not provided with a distribution pipe configured to distribute flow rate into the flat tubes in communication with the manifold sections of the inlet manifold of the micro-channel evaporator.

2 . The refrigeration system according to claim 1 , wherein the outlet manifold of the micro-channel condenser is provided with at least one baffle, the number of the baffle of the outlet manifold of the micro-channel condenser is n, which is the same as the number of the baffle of the inlet manifold of the micro-channel evaporator, and the number of the throttling device is (n+1), which is the same as the number of the manifold sections of the inlet manifold of the micro-channel evaporator; each of the manifold sections of the inlet manifold of the micro-channel evaporator is in communication with one manifold section of the outlet manifold of the micro-channel condenser via a respective branch pipeline, and one of the throttling devices is disposed at each of the branch pipelines.

3 . The refrigeration system according to claim 2 , wherein the number of the baffle of the inlet manifold of the micro-channel evaporator is greater than or equal to two, a drying and filtering unit is disposed at each of the branch pipelines between the manifold sections of the outlet manifold of the micro-channel condenser and the throttling devices, the drying and filtering unit comprises a desiccant and an enclosed cavity configured to arrange the desiccant, and the cavity has an inlet and an outlet, and is in communication with the respective branch pipeline via the inlet and the outlet; the baffles in the inlet manifold of the micro-channel evaporator is approximately uniformly arranged, or, a ratio of a length L1 of the manifold section of the micro-channel condenser in communication with the manifold section in the middle portion of the inlet manifold of the micro-channel evaporator by the branch pipeline, to the number n1 of the flat tubes in communication with the manifold section in the middle portion of the micro-channel evaporator is L1/n1, a ratio of a length L2 of the manifold section of the micro-channel condenser in communication with the manifold section deviating from the middle portion of the inlet manifold of the micro-channel evaporator, to the number n2 of the flat tubes in communication with the manifold section deviating from the middle portion of the inlet manifold of the micro-channel evaporator, is L2/n2, and the ratio of L1/n1 is greater than or equal to the ratio L2/n2.

4 . The refrigeration system according to claim 1 , wherein the number of the baffle of the inlet manifold of the micro-channel evaporator is greater than or equal to two, a drying and filtering unit is provided between the micro-channel condenser and the micro-channel evaporator, the drying and filtering unit comprises a plurality of outlets, and one inlet, the number of the outlets of the drying and filtering unit is the same as the number of the manifold sections of the inlet manifold of the micro-channel evaporator, and the drying and filtering unit comprises a divider; the divider is configured to divide a space of the drying and filtering unit close to the outlets into (n+1) independent sectors, each of the sectors corresponds to one of the outlets, and the outlets are in communication with the manifold sections of the inlet manifold of the micro-channel evaporator respectively via branch pipelines; a ratio of a sectional area of the minimum circulating portion of the sector corresponding to the outlet of the drying and filtering unit in communication with the manifold section at the middle portion of the inlet manifold of the micro-channel evaporator, to the number n1 of the flat tubes in communication with the manifold section at the middle portion of the inlet manifold of the micro-channel evaporator, is greater than or equal to a ratio of a sectional area of the minimum circulating portion of the sector corresponding to the outlet of the drying and filtering unit in communication with the manifold section deviating from the middle portion of the inlet manifold of the micro-channel evaporator, to the number n2 of the flat tubes in communication with the manifold section deviating from the middle portion of the inlet manifold of the micro-channel evaporator; the inlet of the drying and filtering unit is in communication with the outlet manifold of the micro-channel condenser; the throttling device is arranged in the pipeline between the drying and filtering unit and an outlet end of the micro-channel condenser, or pipelines between the outlets of the drying and filtering unit and the micro-channel evaporator.

5 . The refrigeration system according to claim 1 , wherein the number of the baffle of the inlet manifold of the micro-channel evaporator is greater than or equal to two, the outlet manifold of the micro-channel condenser is divided by a baffle into (n+1) manifold sections, a drying and filtering unit is provided between the micro-channel condenser and the micro-channel evaporator; the drying and filtering unit comprises a plurality of outlets and a plurality of inlets, the number of the inlets is the same as the number of the outlets, the number of the outlets of the drying and filtering unit is the same as the number of the manifold sections of the inlet manifold of the micro-channel evaporator, and the drying and filtering unit comprises a divider; the divider is configured to divide an inner space of the drying and filtering unit into (n+1) independent sectors, each of the sectors corresponds to one of the inlets and one of the outlets; the plurality of inlets of the drying and filtering unit are in communication with the manifold sections of the outlet manifold of the micro-channel condenser respectively; the throttling device is arranged at an outlet end of the drying and filtering unit, an outlet end of the micro-channel condenser, an inlet end of the micro-channel evaporator, or the branch pipelines between the outlet end of the micro-channel condenser and the micro-channel evaporator.

6 . The refrigeration system according to claim 5 , wherein the

Assignees

• Hangzhou Sanhua Res Inst Co Ltd

Inventors

• Wang Yanhong
• Yao Zhiyong
• Zhang Senlai

Classifications

• F25B41/06 Primary

  Mechanical Engineering · mapped topic

• F25B13/00

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title

• F25B41/42

  Arrangements for diverging or converging flows, e.g. branch lines or junctions · CPC title

• F25B41/375

  characterised by a variable restriction, e.g. restrictors made of shape memory alloy · CPC title

• F25B43/003

  Filters · CPC title