CN221666718U - Double-loop air pipe machine heat exchanger and dryer - Google Patents

Abstract

The utility model discloses a double-loop air pipe machine heat exchanger and a dryer, wherein a heat exchange system comprises an upper circulation loop and a lower circulation loop which are arranged up and down, the upper circulation loop comprises a first upper branch, a second upper branch and a third upper branch which are arranged in parallel and are sequentially communicated, each of the first upper branch, the second upper branch and the third upper branch comprises n straight pipe sections, and the n straight pipe sections are arranged in parallel from top to bottom along the length direction of a fin; the first and third up legs are adjacent to the leeward and windward sides of the fin, respectively. The heat exchange system can reduce the pressure loss of the heat exchanger, improve the refrigerant diversion effect, improve the refrigerant heat exchange efficiency and achieve the effect of uniform heat exchange.

Description

Double-loop air pipe machine heat exchanger and dryer

Technical Field

The utility model relates to the technical field of dryers, in particular to a double-loop air pipe machine heat exchanger and a dryer.

Background

Along with the improvement of life quality, the application range of the dryer is wider and wider. The existing dryer is internally provided with a double-loop air pipe machine heat exchanger, the heat exchange is carried out between the double-loop air pipe machine heat exchanger and the air entering the shell, the air is heated, and the heated air is discharged into a room for drying.

At present, the existing dryer has at least the following technical problems: the flow distribution effect of the refrigerant in the double-loop air pipe machine heat exchanger is poor, the heat exchange area is small, the heat exchange efficiency of the double-loop air pipe machine heat exchanger is low, and the heat exchange energy efficiency is insufficient.

The above information disclosed in this background section is only for enhancement of understanding of the background section of the application and therefore it may not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems pointed out in the background art, the utility model aims to provide a double-loop air duct machine heat exchanger and a dryer, which can reduce the pressure loss of the heat exchanger, improve the refrigerant diversion effect, improve the refrigerant heat exchange efficiency and achieve the effect of uniform heat exchange.

In order to achieve the aim of the utility model, the utility model is realized by adopting the following technical scheme:

The utility model provides a loop air pipe machine heat exchanger, which comprises: the fin is provided with a heat exchange system; the heat exchange system comprises an upper circulation loop and a lower circulation loop which are arranged up and down, the upper circulation loop comprises a first upper branch, a second upper branch and a third upper branch which are arranged in parallel and are sequentially communicated, the first upper branch, the second upper branch and the third upper branch respectively comprise n straight pipe sections, and the n straight pipe sections are arranged in parallel from top to bottom along the length direction of the fin; the first up leg and the third up leg are respectively close to the leeward side and the windward side of the fin; the lower circulation loop comprises a first lower branch, a second lower branch and a third lower branch which are arranged in parallel and are sequentially communicated, wherein the first lower branch, the second lower branch and the third lower branch respectively at least comprise m straight pipe sections, the m straight pipe sections are arranged in parallel from top to bottom along the length direction of the fin, and m is more than or equal to n; the first down leg and the third down leg are proximate to a leeward side and a windward side of the fin, respectively.

In some embodiments of the present application, the first upper branch is connected to an upper inlet pipe, and the third upper branch is connected to an upper outlet pipe; the upper inlet pipe is communicated with the bottom inlet of the first upper branch pipe, and the upper outlet pipe is communicated with the top outlet of the third upper branch pipe.

In some embodiments of the present application, the first lower leg is connected to a lower inlet pipe, and the third lower leg is connected to a lower outlet pipe; the lower inlet pipe is communicated with the bottom inlet of the first lower branch pipe, and the lower outlet pipe is communicated with the top outlet of the third lower branch pipe.

In some embodiments of the present application, the system further comprises a summary exit pipe, and the upper exit pipe and the lower exit pipe are both in communication with the summary exit pipe.

In some embodiments of the application, the device further comprises a shunt, wherein the shunt is connected with an upper connecting pipe and a lower connecting pipe; the upper inlet pipe is connected with the upper connecting pipe, and the diameter of the upper inlet pipe is larger than that of the upper connecting pipe; the lower inlet pipe is connected with the lower connecting pipe, and the diameter of the lower inlet pipe is larger than that of the lower connecting pipe.

In some embodiments of the application, a diverter inlet pipe is connected to the bottom of the diverter, and a welding horn mouth is arranged at the connection part of the diverter and the diverter inlet pipe.

In some embodiments of the application, the weld horn is circumferentially disposed along an outer wall of the diverter feed tube, the weld horn opening toward the diverter.

In some embodiments of the present application, the expansion valve further comprises an expansion valve, wherein the bottom of the expansion valve is sequentially connected with a vertical inlet pipe, an outer transition pipe, an inner transition pipe and a bent inlet pipe, the upper end of the outer transition pipe is inserted into the vertical inlet pipe, the upper end of the inner transition pipe is inserted into the outer transition pipe, the lower end of the inner transition pipe is inserted into the bent inlet pipe, and the diameter of the inner transition pipe is smaller than the diameter of the vertical inlet pipe and smaller than the diameter of the bent inlet pipe.

In some embodiments of the present application, the expansion valve is sequentially connected with a transverse outlet pipe and a bent outlet pipe, and the bent outlet pipe is communicated with the diverter inlet pipe.

The utility model also provides a dryer, which comprises a shell; the double-loop air duct machine heat exchanger is arranged in the shell.

Compared with the prior art, the utility model has the advantages and positive effects that: the fin is provided with an upper circulation loop and a lower circulation loop, and the upper circulation loop is positioned above the lower circulation loop. The refrigerants in the upper circulation loop and the lower circulation loop independently circulate, and the flow of the refrigerants can be independently regulated respectively, so that the optimal refrigerant heat exchange effect is realized.

The air quantity corresponding to the upper part of the heat exchanger is weaker than the air quantity corresponding to the lower part of the heat exchanger, and the refrigerant flow path of the corresponding upper circulation loop is shorter than that of the lower circulation loop, so that the heat exchanger can be automatically suitable for the air quantity, the heat exchange effect of the heat exchanger is good, and the effect of uniform heat exchange is achieved.

The first and third arms are respectively adjacent to the leeward side and the windward side of the fin, and the second arm is located intermediate the first and third arms. The refrigerant flows into the heat exchanger from the lee side of the heat exchanger and flows to the windward side of the flowing fin, so that the pressure loss of the heat exchanger can be reduced, the refrigerant diversion effect is improved, the refrigerant heat exchange efficiency is improved, and the uniform heat exchange effect is achieved.

Other features and advantages of the present utility model will become apparent upon review of the detailed description of the utility model in conjunction with the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

FIG. 1 is a schematic diagram of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 2 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 3 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 4 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 5 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 6 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 7 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 8 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 9 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

FIG. 10 is a schematic view of a portion of a dual circuit ducted air machine heat exchanger according to an embodiment;

reference numerals: a fin 100;

An upper circulation loop 10, a first upper branch 11, a second upper branch 12, a third upper branch 13, an upper inlet pipe 14 and an upper outlet pipe 15;

A lower circulation loop 20, a first lower leg 21, a second lower leg 22, a third lower leg 23, a lower inlet pipe 24, and a lower outlet pipe 25;

A summary pipe 30;

a diverter 40, an upper connecting tube 41, a lower connecting tube 42, a diverter inlet tube 43, and a weld horn 44;

Expansion valve 50, vertical inlet pipe 51, outer transition pipe 52, inner transition pipe 53, curved inlet pipe 54, transverse outlet pipe 55, curved outlet pipe 56.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

The air conditioner of the present application performs a refrigerating cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and refrigerating or heating an indoor space.

The low-temperature low-pressure refrigerant enters the compressor, the compressor compresses the refrigerant gas into a high-temperature high-pressure state, and the compressed refrigerant gas is discharged. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.

The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state formed by condensation in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator may achieve a cooling effect by exchanging heat with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner may adjust the temperature of the indoor space throughout the cycle.

An outdoor unit of an air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, an indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.

The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater of a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler of a cooling mode.

As shown in fig. 1 to 10, the dual-circuit ducted air conditioner heat exchanger of the present embodiment includes: the fin 100, the fin 100 is equipped with the heat exchange system; the heat exchange system comprises an upper circulation loop 10 and a lower circulation loop 20 which are arranged up and down, wherein the upper circulation loop 10 comprises a first upper branch 11, a second upper branch 12 and a third upper branch 13 which are arranged in parallel and are sequentially communicated, the first upper branch 11, the second upper branch 12 and the third upper branch 13 respectively comprise n straight pipe sections, and the n straight pipe sections are arranged in parallel from top to bottom along the length direction of the fin 100; the first and third up legs 11, 13 are adjacent to the leeward and windward sides of the fin 100, respectively; the first up leg 11 is connected with an up inlet pipe 14, and the third up leg 13 is connected with an up outlet pipe 15. The lower circulation loop 20 comprises a first lower branch 21, a second lower branch 22 and a third lower branch 23 which are arranged in parallel and are sequentially communicated, wherein the first lower branch 21, the second lower branch 22 and the third lower branch 23 respectively at least comprise m straight pipe sections, the m straight pipe sections are arranged in parallel from top to bottom along the length direction of the fin 100, and m is more than or equal to n; the first and third down legs 21, 23 are adjacent to the leeward and windward sides of the fin 100, respectively; the first down leg 21 is connected to a down pipe 24, and the third down leg 23 is connected to a down pipe 25.

The fin 100 of the present utility model is provided with an upper circulation loop 10 and a lower circulation loop 20, and the upper circulation loop 10 is located above the lower circulation loop 20. The refrigerants in the upper circulation loop 10 and the lower circulation loop 20 are independently circulated, and the flow of the refrigerants can be independently regulated respectively so as to realize the optimal refrigerant heat exchange effect.

The air quantity corresponding to the upper part of the heat exchanger is weaker than the air quantity corresponding to the lower part of the heat exchanger, m is larger than or equal to n, the refrigerant flow path of the corresponding upper circulation loop 10 is shorter than the refrigerant flow path of the lower circulation loop 20, and the heat exchanger can be automatically suitable for the air quantity, so that the heat exchange effect of the heat exchanger is good, and the effect of uniform heat exchange is achieved.

The first and third up-branches 11 and 13 are located near the leeward and windward sides of the fin 100, respectively, and the second up-branch 12 is located intermediate the first and third up-branches 11 and 13. The refrigerant flows into the heat exchanger from the lee side of the heat exchanger and flows to the windward side of the flowing fin 100, so that the pressure loss of the heat exchanger can be reduced, the refrigerant diversion effect is improved, the refrigerant heat exchange efficiency is improved, and the uniform heat exchange effect is achieved.

As shown in fig. 4, the fins 100 are arranged obliquely, and wind is blown to the fins 100 in the direction of the arrow, the direction of the arrow being the windward side of the fins 100, and the other side corresponding to the windward side being the leeward side of the fins 100.

In the upper circulation circuit 10, the flow path of the refrigerant is: the upper inlet pipe 14 communicates with the bottom inlet of the first upper branch 11, and the upper outlet pipe 15 communicates with the top outlet of the third upper branch 13. The refrigerant enters the bottom inlet of the first upper branch circuit 11 from the upper inlet pipe 14, flows in the first upper branch circuit 11 from bottom to top and flows into the second upper branch circuit 12; the refrigerant flows from top to bottom in the second upper branch 12 and flows into the third upper branch 13; the refrigerant flows from bottom to top in the third upper branch 13, flows into the upper outlet pipe 15, and flows out of the upper outlet pipe 15.

Through the upper circulation loop 10, the refrigerant can fully and uniformly flow through the fins 100, and sequentially flows into the first upper branch 11, the second upper branch 12 and the third upper branch 13, namely, the refrigerant flows into the heat exchanger from the leeward side of the heat exchanger and flows to the windward side of the flowing fin 100, so that the pressure loss of the heat exchanger can be reduced, the refrigerant distribution effect is improved, the refrigerant heat exchange efficiency is improved, and the uniform heat exchange effect is achieved.

The upper inlet pipe 14 is a bending pipe, the upper inlet pipe 14 is communicated with the first upper branch 11 through bending for many times, so that the flow of the refrigerant can be increased, an effective buffering effect can be achieved on the refrigerant, a large amount of refrigerant is prevented from entering the first upper branch 11 at the same time, and the heat exchange effect of the refrigerant in the first upper branch 11 is poor.

The first and third down legs 21, 23 are located near the leeward and windward sides of the fin 100, respectively, and the second down leg 22 is located intermediate the first and third down legs 21, 23. The lower inlet pipe 24 communicates with the bottom inlet of the first down leg 21, and the lower outlet pipe 25 communicates with the top outlet of the third down leg 23.

In the lower circulation circuit 20, the flow path of the refrigerant is: the refrigerant enters the bottom inlet of the first lower branch 21 from the lower inlet pipe 24, flows from bottom to top in the first lower branch 21 and flows into the second lower branch 22; the refrigerant flows from top to bottom in the second down leg 22 and flows into the third down leg 23; the refrigerant flows from bottom to top in the third down leg 23, flows into the down outlet pipe 25, and flows out of the down outlet pipe 25.

Through the lower circulation loop 20, the refrigerant can fully and uniformly flow through the inside of the fin 100, and sequentially flows into the first lower branch 21, the second lower branch 22 and the third lower branch 23, namely, the refrigerant flows into the heat exchanger from the leeward side of the heat exchanger and flows to the windward side of the flowing fin 100, so that the pressure loss of the heat exchanger can be reduced, the refrigerant distribution effect is improved, the refrigerant heat exchange efficiency is improved, and the uniform heat exchange effect is achieved.

The lower inlet pipe 24 is a bent pipe, and the lower inlet pipe 24 is communicated with the first lower branch pipe 21 through multiple bending, so that the flow of the refrigerant can be increased, an effective buffering effect can be achieved on the refrigerant, a large amount of refrigerant is prevented from entering the first lower branch pipe 21 at the same time, and the heat exchange effect of the refrigerant in the first lower branch pipe 21 is poor.

In this embodiment, n=4, and the first up leg 11, the second up leg 12, and the third up leg 13 each include 4 straight tube sections, which are arranged in parallel from top to bottom along the length direction of the fin 100.

That is, the upper circulation circuit 10 includes 12 straight pipe sections in total, and the 12 straight pipe sections are equally divided into three branches parallel to each other, namely, a first upper branch 11, a second upper branch 12, and a third upper branch 13. The first up leg 11 includes 4 straight tube sections, and the 4 straight tube sections are arranged along the length direction of the fin 100, and the 4 straight tube sections are distributed from top to bottom in order, and two adjacent straight tube sections are communicated through a U-tube section. The second up leg 12 includes 4 straight tube sections, and the 4 straight tube sections are arranged along the length direction of the fin 100, the 4 straight tube sections being distributed sequentially from top to bottom, and two adjacent straight tube sections being communicated through a U-tube section. The third up leg 13 includes 4 straight tube sections, and the 4 straight tube sections are arranged along the length direction of the fin 100, and the 4 straight tube sections are distributed from top to bottom in order, and two adjacent straight tube sections are communicated through a U tube section. Through the arrangement mode, on one hand, the occupied space of the upper circulation loop 10 can be reduced, and on the premise of the same occupied space, the upper circulation loop 10 can be increased as much as possible, so that the flow of the refrigerant and the heat exchange area are increased; on the other hand, the heat exchange device can also play a role in buffering the refrigerant, and prevent a large amount of refrigerant from entering the upper circulation loop 10 at the same time, so that the heat exchange effect of the refrigerant in the upper circulation loop 10 is poor.

In the present embodiment, the lower circulation loop 20 includes 16 straight pipe sections in total, and the 16 straight pipe sections are divided into three branches parallel to each other, namely, a first lower branch 21, a second lower branch 22, and a third lower branch 23. The first down leg 21 includes 6 straight tube segments, and the 6 straight tube segments are arranged along the length direction of the fin 100, the 6 straight tube segments being distributed sequentially from top to bottom, and two adjacent straight tube segments being communicated through a U-tube segment. The second down leg 22 includes 6 straight tube segments, and the 6 straight tube segments are arranged along the length direction of the fin 100, the 6 straight tube segments being distributed sequentially from top to bottom, and two adjacent straight tube segments being communicated through a U-tube segment. The third down leg 23 includes 4 straight tube sections, and the 4 straight tube sections are arranged along the length direction of the fin 100, the 4 straight tube sections being distributed sequentially from top to bottom, and two adjacent straight tube sections being communicated through a U-tube section. Through the arrangement mode, on one hand, the occupied space of the upper circulation loop 10 can be reduced, and on the premise of the same occupied space, the upper circulation loop 10 can be increased as much as possible, so that the flow of the refrigerant and the heat exchange area are increased; on the other hand, the heat exchange device can also play a role in buffering the refrigerant, and prevent a large amount of refrigerant from entering the upper circulation loop 10 at the same time, so that the heat exchange effect of the refrigerant in the upper circulation loop 10 is poor.

The heat exchanger of the utility model further comprises a summary outlet pipe 30, and the upper outlet pipe 15 and the lower outlet pipe 25 are communicated with the summary outlet pipe 30. The refrigerant in the upper circulation circuit 10 flows into the collecting pipe 30 from the upper outlet pipe 15, the refrigerant in the lower circulation circuit 20 flows into the collecting pipe 30 from the lower outlet pipe 25, and the refrigerant is collected and flows out in the collecting pipe 30.

The upper outlet pipe 15 is a bent pipe, the upper outlet pipe 15 is communicated with the collecting outlet pipe 30 through multiple bending, the flow of the refrigerant can be increased, an effective buffering effect can be achieved on the refrigerant, the refrigerant can flow uniformly, and the flowing noise of the refrigerant is reduced.

The lower exit tube 25 is a bending tube, and the lower exit tube 25 is communicated with the summary exit tube 30 through multiple bending, so that the flow of the refrigerant can be increased, the refrigerant can be effectively buffered, the refrigerant can flow uniformly, and the flow noise of the refrigerant is reduced.

The heat exchanger of the present utility model further comprises a flow divider 40, and an upper connecting pipe 41 and a lower connecting pipe 42 are connected to the flow divider 40.

The upper inlet pipe 14 is connected with the upper connecting pipe 41, and the diameter of the upper inlet pipe 14 is larger than that of the upper connecting pipe 41; the refrigerant flows into the upper connecting pipe 41 from the upper inlet pipe 14, the diameter of the upper inlet pipe 14 is larger than that of the upper connecting pipe 41, and the flow speed of the refrigerant can be regulated through the change of the diameter of the flowing pipeline, so that the refrigerant uniformly flows, and the flow noise of the refrigerant is reduced.

In this embodiment, the upper connecting tube 41 is a bent tube, and the upper connecting tube 41 is bent and bent several times

The upper inlet pipe 14 is communicated, so that the flow of the refrigerant can be increased, the refrigerant can be effectively buffered, and a large amount of refrigerant is prevented from entering the upper circulation loop 10 at the same time, so that the heat exchange effect of the refrigerant in the upper circulation loop 10 is poor.

Lower inlet pipe 24 is connected with lower connecting pipe 42, and the diameter of lower inlet pipe 24 is greater than that of lower connecting pipe 42

Is a diameter of (c). The refrigerant flows into the lower connecting pipe 42 from the lower inlet pipe 24, the diameter of the lower inlet pipe 24 is larger than that of the lower connecting pipe 42, and the flow speed of the refrigerant can be regulated through the change of the diameter of the flowing pipeline, so that the refrigerant uniformly flows, and the flow noise of the refrigerant is reduced.

In this embodiment, the lower connecting tube 42 is a bent tube, and the lower connecting tube 42 is connected with the lower inlet tube 24 through multiple bending, so that the flow of the refrigerant can be increased, and an effective buffering effect can be achieved on the refrigerant, so that a large amount of refrigerant is prevented from entering the lower circulation loop 20 at the same time, and the heat exchange effect of the refrigerant in the lower circulation loop 20 is poor.

The bottom of the diverter 40 is connected with a diverter inlet pipe 43, and a welding horn 44 is arranged at the joint of the diverter 40 and the diverter inlet pipe 43. A welding horn 44 is provided along the outer wall circumference of the flow splitter inlet tube 43, the welding horn 44 opening toward the flow splitter 40. Since the material of the diverter 40 is mostly brass, the diverter inlet tube 43 is usually made of red copper, and the diverter inlet tube are different in material and not similar in welding point. By arranging the welding horn mouth 44 and welding the horn mouth 44, the welding of the connecting part of the diverter 40 and the diverter inlet pipe 43 can be ensured to be full and sufficient, and the firm connection and sealing of the diverter 40 and the diverter inlet pipe 43 can be ensured.

The heat exchanger of the utility model also comprises an expansion valve 50, and the bottom of the expansion valve 50 is sequentially connected with a vertical inlet pipe 51, an outer transition pipe 52, an inner transition pipe 53 and a bent inlet pipe 54. The upper end of the outer transition pipe 52 is inserted in the vertical inlet pipe 51, the upper end of the inner transition pipe 53 is inserted in the outer transition pipe 52, the lower end of the inner transition pipe 53 is inserted in the bent inlet pipe 54,

The external refrigerant flows into the expansion valve 50 from the bent inlet pipe 54, the inner transition pipe 53 and the vertical inlet pipe 51. The flow pipe diameter of the refrigerant flowing into the inner transition pipe 53 from the bent inlet pipe 54 is reduced, the flow pipe diameter of the refrigerant flowing into the vertical inlet pipe 51 from the inner transition pipe 53 is increased, the refrigerant is subjected to twice flow pipe diameter change in the flowing process, an effective buffering effect can be achieved on the refrigerant, a large amount of refrigerant is prevented from entering the expansion valve 50 at the same time, the refrigerant flows uniformly, and the flowing noise of the refrigerant is reduced.

The outer transition pipe 52 and the inner transition pipe 53 are made of brass, and large bubbles in the refrigerant can be scattered through the plug-in cooperation of the outer transition pipe 52 and the inner transition pipe 53, so that the large bubbles are broken into small bubbles, and the flow noise of the refrigerant can be reduced.

The bending inlet pipe 54 is a bending pipe, and the refrigerant flows in the bending inlet pipe 54 through multiple bending, so that the refrigerant can be effectively buffered, the refrigerant uniformly flows, and the refrigerant flowing noise is reduced.

The expansion valve 50 is connected with a transverse outlet pipe 55 and a bent outlet pipe 56 in sequence, and the refrigerant in the expansion valve 50 flows out through the transverse outlet pipe 55 and the bent outlet pipe 56 in sequence.

The vertical inlet pipe 51 directly connected with the expansion valve 50 is vertically arranged, and the horizontal outlet pipe 55 directly connected with the expansion valve 50 is horizontally arranged, namely, the refrigerant vertically flows into the expansion valve 50 and then horizontally flows out of the expansion valve 50, so that the noise of the refrigerant flowing can be reduced.

The bent pipe 56 is a bent pipe, and the refrigerant flows into the flow divider inlet pipe 43 after being bent and flowed for many times in the bent pipe 56, so that the refrigerant can be effectively buffered, the refrigerant uniformly flows, and the flowing noise of the refrigerant is reduced.

The utility model also provides a dryer, which comprises a shell, and the double-loop air pipe machine heat exchanger provided by the utility model, wherein the double-loop air pipe machine heat exchanger is arranged in the shell.

The double-loop air duct machine heat exchanger of the embodiment comprises: the fin 100, the fin 100 is equipped with the heat exchange system; the heat exchange system comprises an upper circulation loop 10 and a lower circulation loop 20 which are arranged up and down, wherein the upper circulation loop 10 comprises a first upper branch 11, a second upper branch 12 and a third upper branch 13 which are arranged in parallel and are sequentially communicated, the first upper branch 11, the second upper branch 12 and the third upper branch 13 respectively comprise n straight pipe sections, and the n straight pipe sections are arranged in parallel from top to bottom along the length direction of the fin 100; the first and third up legs 11, 13 are adjacent to the leeward and windward sides of the fin 100, respectively; the first up leg 11 is connected with an up inlet pipe 14, and the third up leg 13 is connected with an up outlet pipe 15. The lower circulation loop 20 comprises a first lower branch 21, a second lower branch 22 and a third lower branch 23 which are arranged in parallel and are sequentially communicated, wherein the first lower branch 21, the second lower branch 22 and the third lower branch 23 respectively at least comprise m straight pipe sections, the m straight pipe sections are arranged in parallel from top to bottom along the length direction of the fin 100, and m is more than or equal to n; the first and third down legs 21, 23 are adjacent to the leeward and windward sides of the fin 100, respectively; the first down leg 21 is connected to a down pipe 24, and the third down leg 23 is connected to a down pipe 25.

The fin 100 of the present utility model is provided with an upper circulation loop 10 and a lower circulation loop 20, and the upper circulation loop 10 is located above the lower circulation loop 20. The refrigerants in the upper circulation loop 10 and the lower circulation loop 20 are independently circulated, and the flow of the refrigerants can be independently regulated respectively so as to realize the optimal refrigerant heat exchange effect.

The air quantity corresponding to the upper part of the heat exchanger is weaker than the air quantity corresponding to the lower part of the heat exchanger, and the refrigerant flow path of the corresponding upper circulation loop 10 is shorter than the refrigerant flow path of the lower circulation loop 20, so that the heat exchanger can be automatically suitable for the air quantity, the heat exchange effect of the heat exchanger is good, and the effect of uniform heat exchange is achieved.

The first and third up-branches 11 and 13 are located near the leeward and windward sides of the fin 100, respectively, and the second up-branch 12 is located intermediate the first and third up-branches 11 and 13.

The upper inlet pipe 14 communicates with the bottom inlet of the first upper branch 11, and the upper outlet pipe 15 communicates with the top outlet of the third upper branch 13. The refrigerant enters the bottom inlet of the first upper branch circuit 11 from the upper inlet pipe 14, flows in the first upper branch circuit 11 from bottom to top and flows into the second upper branch circuit 12; the refrigerant flows from top to bottom in the second upper branch 12 and flows into the third upper branch 13; the refrigerant flows from bottom to top in the third upper branch 13, flows into the upper outlet pipe 15, and flows out of the upper outlet pipe 15.

Through the upper circulation loop 10, the refrigerant can fully and uniformly flow through the fins 100, and sequentially flows into the first upper branch 11, the second upper branch 12 and the third upper branch 13, namely, the refrigerant flows into the heat exchanger from the leeward side of the heat exchanger and flows to the windward side of the flowing fin 100, so that the pressure loss of the heat exchanger can be reduced, the refrigerant distribution effect is improved, the refrigerant heat exchange efficiency is improved, and the uniform heat exchange effect is achieved.

The upper inlet pipe 14 is a bending pipe, the upper inlet pipe 14 is communicated with the first upper branch 11 through bending for many times, so that the flow of the refrigerant can be increased, an effective buffering effect can be achieved on the refrigerant, a large amount of refrigerant is prevented from entering the first upper branch 11 at the same time, and the heat exchange effect of the refrigerant in the first upper branch 11 is poor.

The first and third down legs 21, 23 are located near the leeward and windward sides of the fin 100, respectively, and the second down leg 22 is located intermediate the first and third down legs 21, 23. The lower inlet pipe 24 communicates with the bottom inlet of the first down leg 21, and the lower outlet pipe 25 communicates with the top outlet of the third down leg 23. The refrigerant enters the bottom inlet of the first lower branch 21 from the lower inlet pipe 24, flows from bottom to top in the first lower branch 21 and flows into the second lower branch 22; the refrigerant flows from top to bottom in the second down leg 22 and flows into the third down leg 23; the refrigerant flows from bottom to top in the third down leg 23, flows into the down outlet pipe 25, and flows out of the down outlet pipe 25.

Through the lower circulation loop 20, the refrigerant can fully and uniformly flow through the inside of the fin 100, and sequentially flows into the first lower branch 21, the second lower branch 22 and the third lower branch 23, namely, the refrigerant flows into the heat exchanger from the leeward side of the heat exchanger and flows to the windward side of the flowing fin 100, so that the pressure loss of the heat exchanger can be reduced, the refrigerant distribution effect is improved, the refrigerant heat exchange efficiency is improved, and the uniform heat exchange effect is achieved.

The lower inlet pipe 24 is a bent pipe, and the lower inlet pipe 24 is communicated with the first lower branch pipe 21 through multiple bending, so that the flow of the refrigerant can be increased, an effective buffering effect can be achieved on the refrigerant, a large amount of refrigerant is prevented from entering the first lower branch pipe 21 at the same time, and the heat exchange effect of the refrigerant in the first lower branch pipe 21 is poor.

In this embodiment, n=4, and the first up leg 11, the second up leg 12, and the third up leg 13 each include 4 straight tube sections, which are arranged in parallel from top to bottom along the length direction of the fin 100.

That is, the upper circulation circuit 10 includes 12 straight pipe sections in total, and the 12 straight pipe sections are equally divided into three branches parallel to each other, namely, a first upper branch 11, a second upper branch 12, and a third upper branch 13. The first up leg 11 includes 4 straight tube sections, and the 4 straight tube sections are arranged along the length direction of the fin 100, and the 4 straight tube sections are distributed from top to bottom in order, and two adjacent straight tube sections are communicated through a U-tube section. The second up leg 12 includes 4 straight tube sections, and the 4 straight tube sections are arranged along the length direction of the fin 100, the 4 straight tube sections being distributed sequentially from top to bottom, and two adjacent straight tube sections being communicated through a U-tube section. The third up leg 13 includes 4 straight tube sections, and the 4 straight tube sections are arranged along the length direction of the fin 100, and the 4 straight tube sections are distributed from top to bottom in order, and two adjacent straight tube sections are communicated through a U tube section. Through the arrangement mode, on one hand, the occupied space of the upper circulation loop 10 can be reduced, and on the premise of the same occupied space, the upper circulation loop 10 can be increased as much as possible, so that the flow of the refrigerant and the heat exchange area are increased; on the other hand, the heat exchange device can also play a role in buffering the refrigerant, and prevent a large amount of refrigerant from entering the upper circulation loop 10 at the same time, so that the heat exchange effect of the refrigerant in the upper circulation loop 10 is poor.

In the present embodiment, the lower circulation loop 20 includes 16 straight pipe sections in total, and the 16 straight pipe sections are divided into three branches parallel to each other, namely, a first lower branch 21, a second lower branch 22, and a third lower branch 23. The first down leg 21 includes 6 straight tube segments, and the 6 straight tube segments are arranged along the length direction of the fin 100, the 6 straight tube segments being distributed sequentially from top to bottom, and two adjacent straight tube segments being communicated through a U-tube segment. The second down leg 22 includes 6 straight tube segments, and the 6 straight tube segments are arranged along the length direction of the fin 100, the 6 straight tube segments being distributed sequentially from top to bottom, and two adjacent straight tube segments being communicated through a U-tube segment. The third down leg 23 includes 4 straight tube sections, and the 4 straight tube sections are arranged along the length direction of the fin 100, the 4 straight tube sections being distributed sequentially from top to bottom, and two adjacent straight tube sections being communicated through a U-tube section. Through the arrangement mode, on one hand, the occupied space of the upper circulation loop 10 can be reduced, and on the premise of the same occupied space, the upper circulation loop 10 can be increased as much as possible, so that the flow of the refrigerant and the heat exchange area are increased; on the other hand, the heat exchange device can also play a role in buffering the refrigerant, and prevent a large amount of refrigerant from entering the upper circulation loop 10 at the same time, so that the heat exchange effect of the refrigerant in the upper circulation loop 10 is poor.

The heat exchanger of the utility model further comprises a summary outlet pipe 30, and the upper outlet pipe 15 and the lower outlet pipe 25 are communicated with the summary outlet pipe 30. The refrigerant in the upper circulation circuit 10 flows into the collecting pipe 30 from the upper outlet pipe 15, the refrigerant in the lower circulation circuit 20 flows into the collecting pipe 30 from the lower outlet pipe 25, and the refrigerant is collected and flows out in the collecting pipe 30.

The upper outlet pipe 15 is a bent pipe, the upper outlet pipe 15 is communicated with the collecting outlet pipe 30 through multiple bending, the flow of the refrigerant can be increased, an effective buffering effect can be achieved on the refrigerant, the refrigerant can flow uniformly, and the flowing noise of the refrigerant is reduced.

The lower exit tube 25 is a bending tube, and the lower exit tube 25 is communicated with the summary exit tube 30 through multiple bending, so that the flow of the refrigerant can be increased, the refrigerant can be effectively buffered, the refrigerant can flow uniformly, and the flow noise of the refrigerant is reduced.

The heat exchanger of the present utility model further comprises a flow divider 40, and an upper connecting pipe 41 and a lower connecting pipe 42 are connected to the flow divider 40.

The upper inlet pipe 14 is connected with the upper connecting pipe 41, and the diameter of the upper inlet pipe 14 is larger than that of the upper connecting pipe 41; the refrigerant flows into the upper connecting pipe 41 from the upper inlet pipe 14, the diameter of the upper inlet pipe 14 is larger than that of the upper connecting pipe 41, and the flow speed of the refrigerant can be regulated through the change of the diameter of the flowing pipeline, so that the refrigerant uniformly flows, and the flow noise of the refrigerant is reduced.

In this embodiment, the upper connecting tube 41 is a bent tube, and the upper connecting tube 41 is bent and bent several times

The upper inlet pipe 14 is communicated, so that the flow of the refrigerant can be increased, the refrigerant can be effectively buffered, and a large amount of refrigerant is prevented from entering the upper circulation loop 10 at the same time, so that the heat exchange effect of the refrigerant in the upper circulation loop 10 is poor.

Lower inlet pipe 24 is connected with lower connecting pipe 42, and the diameter of lower inlet pipe 24 is greater than that of lower connecting pipe 42

Is a diameter of (c). The refrigerant flows into the lower connecting pipe 42 from the lower inlet pipe 24, the diameter of the lower inlet pipe 24 is larger than that of the lower connecting pipe 42, and the flow speed of the refrigerant can be regulated through the change of the diameter of the flowing pipeline, so that the refrigerant uniformly flows, and the flow noise of the refrigerant is reduced.

In this embodiment, the lower connecting tube 42 is a bent tube, and the lower connecting tube 42 is connected with the lower inlet tube 24 through multiple bending, so that the flow of the refrigerant can be increased, and an effective buffering effect can be achieved on the refrigerant, so that a large amount of refrigerant is prevented from entering the lower circulation loop 20 at the same time, and the heat exchange effect of the refrigerant in the lower circulation loop 20 is poor.

The bottom of the diverter 40 is connected with a diverter inlet pipe 43, and a welding horn 44 is arranged at the joint of the diverter 40 and the diverter inlet pipe 43. A welding horn 44 is provided along the outer wall circumference of the flow splitter inlet tube 43, the welding horn 44 opening toward the flow splitter 40. Since the material of the diverter 40 is mostly brass, the diverter inlet tube 43 is usually made of red copper, and the diverter inlet tube are different in material and not similar in welding point. By arranging the welding horn mouth 44 and welding the horn mouth 44, the welding of the connecting part of the diverter 40 and the diverter inlet pipe 43 can be ensured to be full and sufficient, and the firm connection and sealing of the diverter 40 and the diverter inlet pipe 43 can be ensured.

The heat exchanger of the utility model also comprises an expansion valve 50, and the bottom of the expansion valve 50 is sequentially connected with a vertical inlet pipe 51, an outer transition pipe 52, an inner transition pipe 53 and a bent inlet pipe 54. The upper end of the outer transition pipe 52 is inserted in the vertical inlet pipe 51, the upper end of the inner transition pipe 53 is inserted in the outer transition pipe 52, the lower end of the inner transition pipe 53 is inserted in the bent inlet pipe 54,

The external refrigerant flows into the expansion valve 50 from the bent inlet pipe 54, the inner transition pipe 53 and the vertical inlet pipe 51. The inner diameter of the inner transition pipe 53 is smaller than the diameter of the vertical inlet pipe 51 and smaller than the diameter of the bent inlet pipe 54, the flow pipe diameter of the refrigerant flowing into the inner transition pipe 53 from the bent inlet pipe 54 is reduced, the flow pipe diameter of the refrigerant flowing into the vertical inlet pipe 51 from the inner transition pipe 53 is increased, the refrigerant is subjected to two-time flow pipe diameter changes in the flowing process, an effective buffering effect can be achieved on the refrigerant, a large amount of refrigerant is prevented from entering the expansion valve 50 at the same time, the refrigerant flows uniformly, and the flow noise of the refrigerant is reduced.

The outer transition pipe 52 and the inner transition pipe 53 are made of brass, and large bubbles in the refrigerant can be scattered through the plug-in cooperation of the outer transition pipe 52 and the inner transition pipe 53, so that the large bubbles are broken into small bubbles, and the flow noise of the refrigerant can be reduced.

The bending inlet pipe 54 is a bending pipe, and the refrigerant flows in the bending inlet pipe 54 through multiple bending, so that the refrigerant can be effectively buffered, the refrigerant uniformly flows, and the refrigerant flowing noise is reduced.

The expansion valve 50 is connected with a transverse outlet pipe 55 and a bent outlet pipe 56 in sequence, and the refrigerant in the expansion valve 50 flows out through the transverse outlet pipe 55 and the bent outlet pipe 56 in sequence.

The vertical inlet pipe 51 directly connected with the expansion valve 50 is vertically arranged, and the horizontal outlet pipe 55 directly connected with the expansion valve 50 is horizontally arranged, namely, the refrigerant vertically flows into the expansion valve 50 and then horizontally flows out of the expansion valve 50, so that the noise of the refrigerant flowing can be reduced.

The bent pipe 56 is a bent pipe, and the refrigerant flows into the flow divider inlet pipe 43 after being bent and flowed for many times in the bent pipe 56, so that the refrigerant can be effectively buffered, the refrigerant uniformly flows, and the flowing noise of the refrigerant is reduced.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the scope of the present utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.

Claims (10)

1. A dual circuit ducted air conditioner heat exchanger, comprising:

The fin is provided with a heat exchange system;

The heat exchange system comprises an upper circulation loop and a lower circulation loop which are mutually independent and are arranged up and down,

The upper circulation loop comprises a first upper branch circuit, a second upper branch circuit and a third upper branch circuit which are arranged in parallel and are sequentially communicated, wherein the first upper branch circuit, the second upper branch circuit and the third upper branch circuit respectively comprise n straight pipe sections, and the n straight pipe sections are arranged in parallel from top to bottom along the length direction of the fins; the first up leg and the third up leg are respectively close to the leeward side and the windward side of the fin;

The lower circulation loop comprises a first lower branch, a second lower branch and a third lower branch which are arranged in parallel and are sequentially communicated, wherein the first lower branch, the second lower branch and the third lower branch respectively at least comprise m straight pipe sections, the m straight pipe sections are arranged in parallel from top to bottom along the length direction of the fin, and m is more than or equal to n; the first down leg and the third down leg are proximate to a leeward side and a windward side of the fin, respectively.

2. The dual circuit ducted air machine heat exchanger of claim 1, wherein,

The first upper branch is connected with an upper inlet pipe, and the third upper branch is connected with an upper outlet pipe;

The upper inlet pipe is communicated with the bottom inlet of the first upper branch pipe, and the upper outlet pipe is communicated with the top outlet of the third upper branch pipe.

3. The dual circuit ducted air machine heat exchanger of claim 2, wherein,

The first lower branch is connected with a lower inlet pipe, and the third lower branch is connected with a lower outlet pipe;

The lower inlet pipe is communicated with the bottom inlet of the first lower branch pipe, and the lower outlet pipe is communicated with the top outlet of the third lower branch pipe.

4. The dual-circuit ducted air machine heat exchanger according to claim 3, characterized in that,

The utility model also comprises a summary exit tube, wherein the upper exit tube and the lower exit tube are communicated with the summary exit tube.

5. The dual circuit ducted air machine heat exchanger of claim 4, wherein,

The heat exchange system further comprises a flow divider, wherein an upper connecting pipe and a lower connecting pipe are connected to the flow divider;

The upper inlet pipe is connected with the upper connecting pipe, and the diameter of the upper inlet pipe is larger than that of the upper connecting pipe;

The lower inlet pipe is connected with the lower connecting pipe, and the diameter of the lower inlet pipe is larger than that of the lower connecting pipe.

6. The dual-circuit ducted air machine heat exchanger of claim 5, wherein,

The bottom of the diverter is connected with a diverter inlet pipe, and a welding horn mouth is arranged at the joint of the diverter and the diverter inlet pipe.

7. The dual circuit ducted air machine heat exchanger according to claim 6, characterized in that,

The welding horn mouth is circumferentially arranged along the outer wall of the diverter inlet pipe, and the welding horn mouth is opened towards the diverter.

8. The dual circuit ducted air machine heat exchanger according to claim 6, characterized in that,

The heat exchange system further comprises an expansion valve, the bottom of the expansion valve is sequentially connected with a vertical inlet pipe, an outer transition pipe, an inner transition pipe and a bent inlet pipe, the upper end of the outer transition pipe is inserted into the vertical inlet pipe, the upper end of the inner transition pipe is inserted into the outer transition pipe, the lower end of the inner transition pipe is inserted into the bent inlet pipe, and the diameter of the inner transition pipe is smaller than that of the vertical inlet pipe and smaller than that of the bent inlet pipe.

9. The dual circuit ducted air machine heat exchanger of claim 8, wherein,

The expansion valve is sequentially connected with a transverse outlet pipe and a bent outlet pipe, and the bent outlet pipe is communicated with the flow divider inlet pipe.

10. A dryer includes a cabinet; -characterized in that it further comprises a double circuit ducted air machine heat exchanger according to any of claims 1-9, which is arranged inside the casing.