CN217274514U

CN217274514U - Air conditioning system and heat exchanger

Info

Publication number: CN217274514U
Application number: CN202220983842.3U
Authority: CN
Inventors: 洪枫淇; 焦伟男
Original assignee: Shenzhen Ketai New Energy Vehicle Air Conditioning Technology Co ltd
Current assignee: Shenzhen Ketai New Energy Vehicle Air Conditioning Technology Co ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2022-08-23
Anticipated expiration: 2032-04-26

Abstract

The application relates to the field of heat exchangers and discloses an air conditioning system and a heat exchanger, wherein the heat exchanger comprises a first heat exchange pipe section and a second heat exchange pipe section, a first heat exchange pipe section array is provided with a first heat exchange pipe, a second heat exchange pipe section array is provided with a second heat exchange pipe, the flow number of the first heat exchange pipe section is smaller than that of the second heat exchange pipe section, and any one of the first heat exchange pipe section and the second heat exchange pipe section is connected in a shunting manner. The heat exchanger that this application provided can optimize distribution heat transfer load, reduces condensation and frosting phenomenon, easily removes condensation and defrosting drainage simultaneously, reduces the influence to heat exchanger performance.

Description

Air conditioning system and heat exchanger

Technical Field

The application relates to the field of heat exchangers, in particular to an air conditioning system and a heat exchanger.

Background

The heat exchanger is provided with fins 400 outside a copper pipe 001 of a heat exchange section, and air side heat exchange is enhanced through forced convection heat exchange, so that the heat transfer coefficient is improved. Most overhead heat pump air conditioners for passenger cars adopt the same set of conventional heat exchangers with fins 400 and flow path of the same specification, and are generally suitable for refrigeration and normal temperature heating, as shown in fig. 1. When the outdoor heat exchanger absorbs heat from the external environment, the refrigerant needs to reach a temperature lower than the environment, when the temperature is lower than the dew point and the freezing point of moisture in the air, the refrigerant can be condensed and frosted and attached to the outer surface of the fin 400, the air circulation of the heat exchanger is influenced, the heat exchange coefficient is reduced, the performance of the heat exchanger is continuously reduced, more frost is formed, the frosting condition is worsened, the performance and the efficiency of the heat exchanger are greatly influenced, the heating needs to be frequently defrosted at the lower temperature, and the heating effect and the system reliability are not good.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heat exchanger, this heat exchanger can optimize distribution heat transfer load, reduces condensation and frosting phenomenon, easily removes condensation and defrosting drainage simultaneously, reduces the influence to heat exchanger performance.

In order to achieve the purpose, the application provides a heat exchanger which comprises a first heat exchange pipe section and a second heat exchange pipe section, wherein the first heat exchange pipe section is provided with a first heat exchange pipe in an array mode, the second heat exchange pipe section is provided with a second heat exchange pipe in an array mode, the flow number of the first heat exchange pipe section is smaller than that of the second heat exchange pipe section, and any one first heat exchange pipe is connected with the second heat exchange pipes in a shunting mode.

In some embodiments, the first heat exchange tube and the second heat exchange tube are connected by a multi-way joint.

In some embodiments, the first heat exchange tube and the second heat exchange tube are welded/integrally formed.

In some embodiments, the first heat exchange tube section and the second heat exchange tube section are each provided with fins, and the spacing between adjacent fins of the first heat exchange tube section is greater than the spacing between adjacent fins of the second heat exchange tube section.

In some embodiments, the heat exchanger further comprises a distributor connected to the inlet of the first heat exchange tube section, and the distributor is used for shunting and conveying fluid to the plurality of first heat exchange tube sections.

In some embodiments, the spacing between adjacent fins of the first heat exchange tube section increases in a direction closer to the distributor.

In some embodiments, the spacing between adjacent fins of the second heat exchange tube section increases in a direction closer to the distributor.

An air conditioning system comprising a compressor, a throttling arrangement, an indoor heat exchanger and a heat exchanger as claimed in any one of the preceding claims.

The heat exchanger provided by the application is respectively provided with a first heat exchange pipe section and a second heat exchange pipe section, fluid is introduced into the first heat exchange pipe section through a first heat exchange pipe, and the second heat exchange pipe section are connected through the first heat exchange pipe and a second heat exchange pipe to realize fluid conveying; the number of the flow paths of the first heat exchange pipe section is reduced, so that the heat exchange area/heat exchange load of the first heat exchange pipe is reduced, the heat exchange load of the refrigerant between the first heat exchange pipe section and air is reduced and the condensation and frosting phenomena are reduced when the refrigerant is conveyed to the inlet end which is the first heat exchange pipe section and has the lowest temperature and is easy to condense and frost during heating.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic flow path diagram of a prior art heat exchanger;

FIG. 2 is a schematic flow diagram of a heat exchanger provided in an embodiment of the present application;

fig. 3 is a fin distribution diagram of a heat exchanger according to an embodiment of the present disclosure.

Wherein:

001-copper tube;

100-distributor, 200-first heat exchange tube section, 300-second heat exchange tube section, 400-fin;

210-a first heat exchange tube;

310-a second heat exchange tube.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic flow path diagram of a heat exchanger according to an embodiment of the present disclosure, and fig. 3 is a schematic distribution diagram of fins 400 of the heat exchanger according to an embodiment of the present disclosure.

The heat exchanger provided by the embodiment of the application comprises a distributor 100, a first heat exchange pipe section 200 and a second heat exchange pipe section 300, wherein the first heat exchange pipe section 200 is provided with a first heat exchange pipe 210 in an array mode, the second heat exchange pipe section 300 is provided with a second heat exchange pipe 310 in an array mode, and by adjusting the arrangement of the heat exchange pipes of the first heat exchange pipe section 200 and the second heat exchange pipe section 300 and the connection of the first heat exchange pipe 210 and the second heat exchange pipe 310, the heat exchange load of the heat exchanger at an inlet is reduced, namely the heat exchange area of a refrigerant flowing through the first heat exchange pipe section 200 and air is reduced; specifically, the number of the flow paths of the first heat exchange tube segment 200 is smaller than that of the flow paths of the second heat exchange tube segment 300, the outlet of each first heat exchange tube 210 is connected with a multi-way joint, the outlet of the first heat exchange tube 210 is connected with at least a plurality of second heat exchange tubes 310, the first heat exchange tube 210 and the second heat exchange tubes 310 have substantially the same size, and the flow path of the refrigerant during heating is as follows: the branches from the distributor 100 respectively enter the first heat exchange tubes 210, and are divided into the second heat exchange tubes 310 by the multi-way joints after flowing through the first heat exchange tubes 210, for example, the multi-way joints are three-way joints, one group of the first heat exchange tubes 210 are connected with two groups of the second heat exchange tubes 310 by the three-way joints, and the ratio of the number of the flow paths of the first heat exchange tube sections 200 to the number of the flow paths of the second heat exchange tube sections 300 is 1: 2. Therefore, by reducing the number of the flow paths of the first heat exchange tube section 200, the flow rate of the refrigerant in the first heat exchange tube section 200 is improved, and meanwhile, the effective heat exchange area and the heat exchange load of the refrigerant in the first heat exchange tube section 200 are reduced, so that the condensation and frosting phenomena of the heat exchanger at the inlet of the heat exchanger, namely the first heat exchange tube section 200 at the bottom, are reduced.

The first heat exchanging pipe 210 and the second heat exchanging pipe 310 can be connected by multi-way joints and can be integrally formed by welding. The first heat exchanging pipe 210 and the second heat exchanging pipe 310 are preferably made of copper, and the application is not particularly limited thereto.

An embodiment of the present application provides a heat exchanger comprised of a distributor 100, a first heat exchange tube section 200 and a second heat exchange tube section 300. The first heat exchange tube sections 200 are provided with first heat exchange tubes 210 in an array, and fins 400 are arranged outside the first heat exchange tubes 210; the second heat exchange tube sections 300 are provided with second heat exchange tubes 310 in an array, fins 400 are arranged outside the second heat exchange tubes 310, the distributor 100 serves as a fluid inlet, fluid is conveyed into each first heat exchange tube 210 of the first heat exchange tube sections 200 through shunting, and the first heat exchange tube sections 200 and the second heat exchange tube sections 300 are connected and in fluid communication through the first heat exchange tubes 210 and the second heat exchange tubes 310. In this embodiment, since the first heat exchange tube section 200 is disposed close to the distributor 100, and the temperature of the refrigerant inlet is low, in order to avoid condensation and frost formation of the heat exchanger on the outer surface of the first heat exchange tube section 200 during heating, the fins 400 of the first heat exchange tube section 200 are particularly disposed at intervals increased relative to the fins 400 of the second heat exchange tube section 300, so that the heat exchange load of the first heat exchange tube section 200 is effectively reduced, and the condensation and frost formation phenomena are reduced. In addition, the large-distance arrangement of the fins 400 of the first heat exchange pipe section 200 facilitates the condensation removal and the water drainage during defrosting, and reduces the influence on the performance of the heat exchanger.

As a preferable mode of the above embodiment, a specific distribution manner of all the fins 400 of the first heat exchange tube section 200 adopts a non-uniform distribution in which the distance between adjacent fins 400 increases in a direction close to the distributor 100, so as to match with a characteristic that the refrigerant flows in from the distributor 100 and the temperature of the refrigerant gradually increases toward the first heat exchange tube section 200 during the heating process; similarly, the embodiment of all fins 400 of the second heat exchange tube section 300 may also employ a non-uniformity profile with increasing spacing between adjacent fins 400 in the direction of proximity to the distributor 100/first heat exchange tube section 200. Of course, in implementation, in order to facilitate the arrangement of the fins 400 and the processing of the heat exchanger, the fins 400 of the first heat exchange tube segment 200 and the second heat exchange tube segment 300 may be arranged at equal intervals, and at the same time, the interval between the fins 400 of the first heat exchange tube segment 200 is kept larger than that between the fins 400 of the second heat exchange tube segment 300.

The application also provides an air conditioning system, including compressor, throttling arrangement, indoor heat exchanger and the heat exchanger as the record of above embodiment, this heat exchanger is used for acting as air conditioning system's outdoor heat exchanger, and the connection of each part of air conditioning system refers to prior art setting, and the core of this application lies in improving the structure of heat exchanger, and it is no longer repeated air conditioning system here.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The air conditioning system and the heat exchanger provided by the application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, without departing from the principle of the present application, the present application can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the claims of the present application.

Claims

1. A heat exchanger is characterized by comprising a first heat exchange pipe section and a second heat exchange pipe section, wherein a first heat exchange pipe is arranged in the first heat exchange pipe section in an array mode, a second heat exchange pipe is arranged in the second heat exchange pipe section in an array mode, the number of flow paths of the first heat exchange pipe section is smaller than that of the second heat exchange pipe section, and any first heat exchange pipe is connected with a plurality of second heat exchange pipes in a shunting mode.

2. The heat exchanger of claim 1, wherein the first heat exchange tube and the second heat exchange tube are connected by a multi-way joint.

3. The heat exchanger of claim 1, wherein the first heat exchange tube and the second heat exchange tube are welded/integrally formed.

4. The heat exchanger as recited in any one of claims 1 to 3 wherein each of the first and second heat exchange tube segments is finned, the spacing between adjacent fins of the first heat exchange tube segment being greater than the spacing between adjacent fins of the second heat exchange tube segment.

5. The heat exchanger as recited in claim 4 further comprising a distributor connected to an inlet of the first heat exchange tube section, the distributor adapted to distribute fluid to a plurality of the first heat exchange tube sections.

6. The heat exchanger as recited in claim 5 wherein the spacing between adjacent fins of said first heat exchange tube section increases in a direction approaching said distributor.

7. The heat exchanger of claim 5, wherein the spacing between adjacent fins of the second heat exchange tube section increases in a direction approaching the distributor.

8. An air conditioning system comprising a compressor, a throttling device, an indoor heat exchanger and a heat exchanger according to any one of claims 1 to 7.