Plate-type heat exchanger with secondary throttling function

Abstract

The invention discloses a plate-type heat exchanger with a secondary throttling function. The plate-type heat exchanger comprises a front end plate and a rear end plate; fluid interface channels are arranged symmetrically on the front end plate and the rear end plate; heat-exchanging plate units are arranged between the front end plate and the rear end plate and are overlapped in sequence; each heat-exchanging plate unit consists of a first heat-exchanging plate and a second heat-exchanging plate; one distributing zone is arranged between a heat-exchanging zone and a first flow guiding zone; one distributing zone is arranged between the heat-exchanging zone and a second flow guiding zone; one distributing zone is arranged between the other heat-exchanging zone and the other first flow guiding zone; and one distributing zone is arranged between the other heat-exchanging zone and the other second flow guiding zone. By using the plate-type heat exchanger with the secondary throttling function, provided by the invention, the resistance of the refrigerant flowing through a channel between the heat-exchanging zones on the corner hole sides of an inlet and an outlet is increased, the resistance of the refrigerant flowing through the channel between the heat-exchanging zones is decreased, and the refrigerant is uniformly distributed on the whole surface of the heat-exchanging zone, in this way, the areas of the heat-exchanging plates are used sufficiently.

Description

technical field

[0001] The invention relates to the field of heat exchange equipment, in particular to a plate heat exchanger with secondary throttling. Background technique

[0002] The plate heat exchanger is the most efficient exchange device. The adjacent sides of each heat exchange plate are generally flow channels for different working fluids, which are used to exchange heat or cold when the refrigerant is working. Such as DE4422178 and WO / 94 / 14021 / are typical structures of plate heat exchangers. Another example is the basic structure of the Chinese patent ZL96198973 as mentioned above, and some schemes are provided on the distribution channel of the working fluid.

[0003] As described in CN1204393A and CN101261057B patents, a primary or secondary throttling device is set between the inlet channel and the evaporation channel, but the throttling device is arranged around the corner hole of the refrigerant inlet, which can only solve the problem that the refrigerant c...

Examples

Embodiment Construction

[0019] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0021] figure 1 Shown is a plate heat exchanger, which includes a front end plate 3 and a rear end plate 4, the front end plate 3 and the rear end plate 4 are symmetrically provided with fluid interface channels 5; 6; 7; 8, the front end plate and A heat exchange plate group is arranged between the rear end plates, and the heat exchange plate groups are stacked sequentially. The heat exchange plate group is composed of a plurality of first he...

technical field

[0001] The invention relates to the field of heat exchange equipment, in particular to a plate heat exchanger with secondary throttling. Background technique

[0002] The plate heat exchanger is the most efficient exchange device. The adjacent sides of each heat exchange plate are generally flow channels for different working fluids, which are used to exchange heat or cold when the refrigerant is working. Such as DE4422178 and WO / 94 / 14021 / are typical structures of plate heat exchangers. Another example is the basic structure of the Chinese patent ZL96198973 as mentioned above, and some schemes are provided on the distribution channel of the working fluid.

[0003] As described in CN1204393A and CN101261057B patents, a primary or secondary throttling device is set between the inlet channel and the evaporation channel, but the throttling device is arranged around the corner hole of the refrigerant inlet, which can only solve the problem that the refrigerant c...

Examples

Embodiment Construction

[0019] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0020] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0021] figure 1 Shown is a plate heat exchanger, which includes a front end plate 3 and a rear end plate 4, the front end plate 3 and the rear end plate 4 are symmetrically provided with fluid interface channels 5; 6; 7; 8, the front end plate and A heat exchange plate group is arranged between the rear end plates, and the heat exchange plate groups are stacked sequentially. The heat exchange plate group is composed of a plurality of first he...

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