CN217236139U - Heat exchanger and air conditioner - Google Patents

Abstract

The application relates to the technical field of air conditioners, and discloses a heat exchanger, including: the heat exchanger body is provided with a plurality of heat exchange branches; and the liquid storage and distribution device is arranged among the plurality of heat exchange branches and comprises a liquid storage shell, a liquid inlet pipe and a liquid outlet pipe, the liquid storage shell forms a liquid storage and distribution cavity, the first end of the liquid inlet pipe and the first end of the liquid outlet pipe are communicated with the liquid storage and distribution cavity, the liquid inlet pipe is communicated with a first part of heat exchange branches in the plurality of heat exchange branches, the liquid outlet pipe is communicated with a second part of heat exchange branches in the plurality of heat exchange branches, and the liquid storage and distribution device is used for partially storing refrigerants flowing out of the first part of heat exchange branches in the liquid storage and distribution cavity and then enabling the refrigerants to flow into the second part of heat exchange branches through the liquid outlet pipe. The application provides a heat exchanger with stock solution diverging device can adjust the refrigerant flow in the heat exchanger. The application also discloses an air conditioner.

Description

Heat exchanger and air conditioner

Technical Field

The application relates to the technical field of air conditioners, for example to a heat exchanger and an air conditioner.

Background

At present, an air conditioner, as a very common electric appliance, can operate in a cooling or heating mode to adjust the indoor temperature of a user, and is widely applied to various living or working environments such as homes, offices, markets and the like.

The optimal refrigerant amount required by the air conditioner is different when the air conditioner operates under different working conditions or different loads. However, in general, the refrigerant charge amount is determined in order to ensure that the refrigerant circulation system of the air conditioner operates at a high capacity output.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

taking the operation refrigeration working condition of the air conditioner as an example, when the refrigeration capacity of the air conditioner does not need to be maximum, the frequency of the compressor does not need to be too high, at the moment, the refrigerant flowing into the evaporator can have a part of liquid refrigerant, so that the effective heat exchange area of the evaporator is reduced, the refrigeration effect is influenced, and the energy efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a heat exchanger and an air conditioner, wherein a liquid storage and distribution device is arranged among a plurality of heat exchange branches of the heat exchanger to adjust the amount of refrigerants entering a refrigerant circulation system of the air conditioner, so that the air conditioner has the optimal running state under different loads.

In some embodiments, the heat exchanger comprises: the heat exchanger body is provided with a plurality of heat exchange branches; and the liquid storage and distribution device is arranged among the plurality of heat exchange branches and comprises a liquid storage shell, a liquid inlet pipe and a liquid outlet pipe, the liquid storage shell forms a liquid storage and distribution cavity, the first end of the liquid inlet pipe and the first end of the liquid outlet pipe are communicated with the liquid storage and distribution cavity, the liquid inlet pipe is communicated with a first part of heat exchange branches in the plurality of heat exchange branches, the liquid outlet pipe is communicated with a second part of heat exchange branches in the plurality of heat exchange branches, and the liquid storage and distribution device is used for partially storing refrigerants flowing out of the first part of heat exchange branches in the liquid storage and distribution cavity and then enabling the refrigerants to flow into the second part of heat exchange branches through the liquid outlet pipe.

Optionally, the stock solution casing includes the drain pan, wherein, the first end of feed liquor pipe and the first end of drain pipe all stretch into stock solution reposition of redundant personnel intracavity portion, just, the first end of feed liquor pipe extremely the distance of drain pipe is less than the first end of drain pipe extremely the distance of drain pan.

Optionally, a distance between the first end of the liquid inlet pipe and the bottom shell is greater than or equal to 10 mm.

Optionally, the liquid inlet pipe is linear; and/or the liquid outlet pipe is linear.

Optionally, the number of the liquid outlet pipes is multiple, the number of the heat exchange branches in the second part of the heat exchange branches is multiple, and the liquid outlet pipes are respectively communicated with the multiple heat exchange branches in the second part of the heat exchange branches one by one.

Optionally, each drain pipe all includes and stretches into the first end of stock solution reposition of redundant personnel intracavity portion, wherein, a plurality of the first end of drain pipe is to the distance of the drain pan of stock solution casing is the same.

Optionally, the vertical distances from the first ends of the liquid outlet pipes to the liquid inlet pipe are the same.

Optionally, the heat exchanger further comprises: the liquid distribution device comprises a confluence pipe orifice and a plurality of liquid distribution branch pipes, wherein the liquid distribution branch pipes are communicated with the heat exchange branch pipes in the first part of heat exchange branch pipes one by one, and the confluence pipe orifice is communicated with the second end of a liquid inlet pipe of the liquid storage and distribution device.

Optionally, the liquid storage and distribution device is arranged on the side of the heat exchanger body.

In some embodiments, the air conditioner comprises a heat exchanger as described above.

The heat exchanger and the air conditioner provided by the embodiment of the disclosure can realize the following technical effects:

the heat exchanger that this disclosed embodiment provided is provided with stock solution diverging device between many heat transfer branches, and stock solution diverging device's feed liquor pipe is linked together with the first part heat transfer branch road in many heat transfer branches, and stock solution diverging device's drain pipe is linked together with the second part heat transfer branch road in many heat transfer branches. The liquid storage and distribution device is arranged between the first part of heat exchange branch and the second part of heat exchange branch, and can store the refrigerant flowing out of the first part of heat exchange branch of the heat exchanger partially in the liquid storage and distribution cavity, and the refrigerant flows into the second part of heat exchange branch through the liquid outlet pipe to continuously exchange heat.

Therefore, the liquid storage and distribution device arranged among the heat exchange branches can adjust the refrigerant quantity in the heat exchange branches in the heat exchanger body, so that the refrigerant quantity participating in refrigerant circulation is different when the air conditioner operates under different loads, and the air conditioner has the optimal operation state under different loads.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

FIG. 1 is a schematic diagram of a heat exchanger according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a refrigerant flow path when the heat exchanger is used as an outdoor heat exchanger under a refrigeration condition according to an embodiment of the disclosure;

FIG. 3 is a schematic structural diagram of a liquid storage and distribution device provided by the embodiment of the disclosure;

FIG. 4 is a schematic structural diagram of another liquid storage and distribution device provided by the embodiment of the disclosure;

FIG. 5 is a schematic structural diagram of another liquid storage and distribution device provided by the embodiment of the disclosure;

fig. 6 is a schematic cross-sectional view of a liquid storage and distribution device at a first end of a liquid outlet pipe according to an embodiment of the disclosure.

Reference numerals:

1: a heat exchanger body; 2: a liquid storage and distribution device; 3: a liquid separating device; 4: a first portion of the heat exchange branches; 5: a second part of heat exchange branch;

21: a liquid inlet pipe; 211: a first end of a liquid inlet pipe; 22: a liquid outlet pipe; 221: a first end of the drain tube; 23: a liquid storage housing; 231: a bottom case; 24: a liquid full line.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

The embodiment of the disclosure provides an air conditioner.

Generally, an air conditioner includes an indoor heat exchanger, an outdoor heat exchanger, a throttling device and a compressor, the indoor heat exchanger, the outdoor heat exchanger, the throttling device and the compressor are connected through refrigerant pipelines to form a refrigerant circulation loop, and the refrigerant passes through the refrigerant circulation loop along the flow direction set by different operation modes to realize different operation modes such as a refrigeration mode and a heating mode.

The embodiment of the disclosure simultaneously provides a heat exchanger.

Alternatively, the heat exchanger may be an indoor heat exchanger or an outdoor heat exchanger in the aforementioned air conditioner.

The following description will be given in detail by taking the heat exchanger as an outdoor heat exchanger as an example under the operation and refrigeration conditions of the air conditioner.

Optionally, the heat exchanger comprises a heat exchanger body 1 and a liquid storage and diversion device 2. Heat exchanger body 1 is provided with many heat transfer branch roads, and stock solution diverging device 2 sets up between many heat transfer branch roads, and stock solution diverging device 2 includes stock solution casing 23, feed liquor pipe 21 and drain pipe 22, and stock solution casing 23 constitutes stock solution diverging chamber, and the first end 211 of feed liquor pipe 21 and the first end 221 of drain pipe 22 all are linked together with stock solution diverging chamber. The liquid inlet pipe 21 is communicated with a first part heat exchange branch 4 in the plurality of heat exchange branches, the liquid outlet pipe 22 is communicated with a second part heat exchange branch 5 in the plurality of heat exchange branches, and the liquid storage and distribution device 2 is used for partially storing a refrigerant flowing out of the first part heat exchange branch 4 in the liquid storage and distribution cavity, and then the refrigerant flows into the second part heat exchange branch 5 through the liquid outlet pipe 22. As shown in fig. 1-6.

When the air conditioner operates in a refrigeration working condition, the air conditioner comprises different refrigeration operation modes such as rated refrigeration, intermediate refrigeration, low-temperature intermediate refrigeration and the like, the loads of the different refrigeration operation modes are different, and the optimal refrigerant quantity in a required refrigerant circulating flow path is also different. The embodiment of the disclosure provides a heat exchanger with a liquid storage and distribution device 2, which can partially store a refrigerant flowing through the heat exchanger to adjust the amount of the refrigerant flowing through the heat exchanger or a refrigerant circulation loop, so that the amount of the refrigerant in the heat exchanger or the refrigerant circulation loop conforms to the operation mode of the current air conditioner, the operation capacity of the air conditioner under different operation loads is improved, and the Annual energy consumption rate (APF) of the air conditioner is facilitated.

The heat exchanger body 1 comprises a plurality of heat exchange branch circuits which are communicated with one another, the plurality of heat exchange branch circuits comprise a first part heat exchange branch circuit 4 and a second part heat exchange branch circuit 5, optionally, when the air conditioner operates in a refrigeration working condition, the first part heat exchange branch circuit 4 is connected with the second part heat exchange branch circuit 5 in series, and the flowing sequence of the refrigerant in the heat exchanger can be that the refrigerant firstly flows through the first part heat exchange branch circuit 4 and then flows through the second part heat exchange branch circuit 5. Optionally, in the use state of the heat exchanger, the first partial heat exchange branch 4 is disposed at the upper part of the second partial heat exchange branch 5, as shown in fig. 2. Alternatively, the second partial heat exchange branch 5 may be a subcooling section of a heat exchanger.

The liquid storage and distribution device 2 is of a shell structure with a liquid storage and distribution cavity, and can partially store the refrigerant flowing from the heat exchanger. The aforementioned liquid storage and distribution device 2 is used for partially storing the refrigerant flowing out of the first partial heat exchange branch 4 in the liquid storage and distribution cavity, and the "partial storage" here may be understood as partial storage of the liquid refrigerant flowing out of the first partial heat exchange branch 4. For example, the first part heat transfer branch 4 of heat exchanger flows into the stock solution reposition of redundant personnel intracavity of stock solution diverging device 2 through feed liquor pipe 21, at this moment, gaseous refrigerant can flow into second part heat transfer branch 5 through the drain pipe 22 of stock solution diverging device 2, when the liquid refrigerant of stock solution reposition of redundant personnel intracavity reaches more than full liquid line 24, liquid refrigerant also can flow into second part heat transfer branch 5 through drain pipe 22, and the refrigerant that is less than full liquid line 24 can be saved in stock solution reposition of redundant personnel intracavity, the second part heat transfer branch 5 that does not get into the heat exchanger, namely, do not participate in the refrigerant circulation system of air conditioner.

Alternatively, the liquid storage and diversion device 2 may be barrel-shaped.

When the outdoor environment temperature is relatively low, the air conditioner can meet the temperature requirement of the user without exerting the maximum refrigerating capacity of the air conditioner, such as an intermediate refrigerating mode or a low-temperature intermediate refrigerating mode of the air conditioner. The heat exchanger provided by the embodiment of the disclosure can adjust the amount of the refrigerant flowing through the heat exchanger, and adjust the amount of the refrigerant flowing into the refrigerant circulating system, so that the refrigerant entering the evaporator through the throttling device can fully exchange heat in the evaporator, and the operation energy efficiency ratio of the air conditioner is improved.

Optionally, the liquid inlet pipe 21 of the liquid storage and diversion device 2 is a copper pipe with the same inner diameter and material as the refrigerant pipe in the heat exchange branch. Similarly, the liquid outlet pipe 22 of the liquid storage and distribution device 2 is a copper pipe with the same inner diameter and material as the refrigerant pipe in the heat exchange branch.

Optionally, each of the plurality of heat exchange branches includes one or more refrigerant pipes. The number of the refrigerant pipes contained in each heat exchange branch can be the same or different. Optionally, when the heat exchange branch includes a plurality of refrigerant pipes, the plurality of refrigerant pipes are connected in series.

Optionally, the liquid storage casing 23 includes a bottom shell 231, wherein the first end of the liquid inlet pipe 21 and the first end of the liquid outlet pipe 22 both extend into the liquid storage shunting cavity, and a distance from the first end of the liquid inlet pipe 21 to the bottom shell 231 is smaller than a distance from the first end of the liquid outlet pipe 22 to the bottom shell 231.

The distance from the first end of the liquid inlet pipe 21 extending into the liquid storage shunting cavity to the bottom shell 231 is smaller than the distance from the first end of the liquid outlet pipe 22 extending into the liquid storage shunting cavity to the bottom shell 231, so that the liquid storage shunting device 2 can partially store the liquid refrigerant flowing into the liquid storage shunting cavity through the first end of the liquid inlet pipe 21, and after the liquid refrigerant reaches the liquid full line 24, the liquid refrigerant flows out of the liquid storage shunting device 2 through the liquid outlet pipe 22. Optionally, the liquid full line 24 of the liquid storage and distribution device 2 is a horizontal line of the first end 221 of the liquid outlet pipe 22, as shown in fig. 4.

Optionally, the distance h from the first end 211 of the liquid inlet pipe 21 to the bottom shell 231 is greater than or equal to 10 mm, as shown in fig. 5.

When the refrigerant in the first part heat exchange branch 4 flows into the liquid storage and distribution cavity through the liquid inlet pipe 21, the refrigerant flowing into the liquid storage and distribution cavity is turbulent due to the high pressure of the refrigerant, and if the refrigerant in the turbulent state directly flows into the second part heat exchange branch 5 of the heat exchanger through the liquid outlet pipe 22, the refrigerant circulating system of the air conditioner is unstable. The distance h from the first end of the liquid inlet pipe 21 to the bottom shell 231 is greater than or equal to 10 mm, so that the impact of the high-pressure refrigerant on the bottom shell 231 of the liquid storage and distribution device 2 is reduced, the refrigerant turbulence phenomenon in the liquid storage and distribution cavity caused by the high-pressure refrigerant is reduced, the stability of the refrigerant flowing out through the liquid outlet pipe 22 is improved, and the stability of a refrigerant circulating system of the air conditioner is further improved.

Optionally, the liquid inlet pipe 21 is linear; and/or, the effluent channel 22 may be linear.

The linear liquid inlet pipe 21 can enable the refrigerant to flow from bottom to top in the liquid storage and distribution device 2, and instability of a refrigerant circulating system caused by the fact that the refrigerant is turbulent and directly flows into the liquid outlet pipe 22 due to high pressure is reduced. Meanwhile, the linear liquid inlet pipe 21 and/or the linear liquid outlet pipe 22 reduce the volume of the liquid inlet pipe 21 and/or the liquid outlet pipe 22 in the liquid storage and flow dividing cavity, and further increase the effective liquid storage volume of the liquid storage and flow dividing cavity. Under the same demand of effective stock solution volume, reduced stock solution diverging device 2's volume, and then be favorable to reducing the volume of heat exchanger.

Optionally, under three refrigeration modes, namely a rated refrigeration mode, an intermediate refrigeration mode and a low-temperature intermediate refrigeration mode, part of the refrigerant flowing out of the first part of the heat exchange branch circuit is stored in the liquid storage branch cavity. Under the rated refrigeration mode, the frequency of the compressor is high, the flow rate of the refrigerant is large, the impact force is large, and the amount of the refrigerant stored in the liquid storage shunting cavity under the rated refrigeration mode is larger than the storage amount under the intermediate refrigeration mode and the low-temperature intermediate refrigeration mode. Therefore, the heat exchanger provided by the embodiment of the disclosure can further adjust the storage amount of the refrigerant in the refrigerant shunting cavity under different loads by using the frequency of the compressor, the flow rate of the refrigerant and the impact force.

When the air conditioner operates in a refrigeration working condition, the operation parameters of the rated refrigeration mode, the intermediate refrigeration mode and the low-temperature intermediate refrigeration mode are shown in table 1.

TABLE 1

Item	Rated refrigeration	Intermediate refrigeration	Low temperature intermediate
				Refrigerating capacity (W) of air-conditioner 1	3442.643	1669.456	1765.894
Refrigerating capacity (W) of air-conditioner 2	3420	1662	1778
				Power of air-conditioner 1 (W)	1031.515	394.818	290.42
Power of air-conditioner 2 (W)	975	373	295

In table 1, the liquid storage and diversion device 2 is disposed on an outdoor heat exchanger in the air conditioner 1, and the liquid storage and diversion device 2 is not disposed on a heat exchanger in the air conditioner 2. The liquid inlet pipe 21 of the liquid storage and distribution device 2 is linear, and the distance from the first end of the liquid inlet pipe 21 to the bottom case 231 is 10 mm.

In the intermediate refrigeration mode, the higher the power of the air conditioner is, the more advantageous the APF is when the refrigeration capacity meets the national standard requirements, and in the low-temperature intermediate refrigeration mode, the lower the power of the air conditioner is, the more advantageous the APF is when the capacity meets the national standard requirements.

In table 1, in the rated cooling mode, the cooling capacity of the air conditioner 1 is 3442.643W and the power is 1031.515W, and the cooling capacity of the air conditioner 2 is 3420W and the power is 975W; in the intermediate cooling mode, the cooling capacity of the air conditioner 1 is 1669.456W and the power is 394.818W, and the cooling capacity of the air conditioner 2 is 1662W and the power is 373W; in the low-temperature intermediate cooling mode, the cooling capacity of the air conditioner 1 is 1765.894W and the power is 290.42W, and the cooling capacity of the air conditioner 2 is 1778W and the power is 295W.

As can be seen from the data in table 1, compared with the air conditioner 2 without the liquid storage and diversion device 2 in the outdoor heat exchanger, the air conditioner 1 with the liquid storage and diversion device 2 in the outdoor heat exchanger provided in the embodiment of the present disclosure improves the power of the air conditioner in the intermediate cooling mode, and reduces the power of the air conditioner in the low-temperature intermediate cooling mode. Therefore, the heat exchanger provided with the liquid storage and flow dividing device 2 provided by the embodiment of the disclosure improves the APF of the air conditioner.

Optionally, the number of the liquid outlet pipes 22 is plural, the number of the heat exchange branches in the second part of heat exchange branches 5 is plural, and the plurality of liquid outlet pipes 22 are respectively communicated with the plurality of heat exchange branches in the second part of heat exchange branches 5 one by one.

The second part of the heat exchange branches 5 comprises a plurality of heat exchange branches which are communicated in parallel. There may be a plurality of effluent tubes 22. The plurality of liquid outlet pipes 22 are respectively communicated with the plurality of heat exchange branches in the second part of heat exchange branches 5 one by one, so that each heat exchange branch in the second part of heat exchange branches 5 has a liquid outlet pipe 22 corresponding thereto.

When the quantity of drain pipe 22 is a plurality of, when the quantity of the heat transfer branch road in the second part heat transfer branch road 5 is a plurality of, when the high pressure refrigerant that flows out in the first part heat transfer branch road 4 flows into stock solution reposition of redundant personnel intracavity through feed liquor pipe 21, because the refrigerant turbulence causes the refrigerant volume that flows into different drain pipes 22 to be different easily, and then makes the heat transfer ability of the second part heat transfer branch road 5 of heat exchanger inhomogeneous, and then has reduced the heat transfer homogeneity of heat exchanger.

When the quantity of drain pipe 22 is a plurality of, when the quantity of the heat transfer branch road in the second part heat transfer branch road 5 is a plurality of, the distance of the first end of feed liquor pipe 21 to drain pan 231 is more than or equal to 10 millimeters, has reduced the impact of high pressure refrigerant with drain pan 231 of stock solution diverging device 2, has reduced the refrigerant turbulence phenomenon in the stock solution diverging chamber that causes because the high pressure refrigerant, has improved the homogeneity of the refrigerant volume that flows into every drain pipe 22.

When the air conditioner operates in a refrigeration working condition, taking the number of the heat exchange branches in the second part of heat exchange branches 5 as 3 and the number of the liquid outlet pipes 22 as 3 as an example, the outlet temperatures of the 3 heat exchange branches in the second part of heat exchange branches 5 in the rated refrigeration mode, the intermediate refrigeration mode and the low-temperature intermediate refrigeration mode are shown in table 2.

TABLE 2

Item	Rated refrigeration	Intermediate refrigeration	Low temperature intermediate
				Heat exchange branch 1 (DEG C)	48.3	42.8	36.4
Heat exchange branch 2 (DEG C)	48.4	42.9	36.6
				Heat exchange branch 3 (DEG C)	43.5	41.7	34.9

The outlet temperatures of the heat exchange branch 1, the heat exchange branch 2, and the heat exchange branch 3 of the second part of heat exchanger branches in the rated refrigeration mode, the intermediate refrigeration mode, and the low-temperature intermediate refrigeration mode are given in table 2.

In table 2, in the rated refrigeration mode, the outlet temperature of heat exchange branch 1 is 48.3 ℃, the outlet temperature of heat exchange branch 2 is 48.4 ℃, and the outlet temperature of heat exchange branch 3 is 43.5 ℃; under the intermediate refrigeration mode, the outlet temperature of the heat exchange branch 1 is 42.8 ℃, the outlet temperature of the heat exchange branch 2 is 42.9 ℃ and the outlet temperature of the heat exchange branch 3 is 41.7 ℃; under the low-temperature intermediate refrigeration mode, the outlet temperature of the heat exchange branch 1 is 36.4 ℃, the outlet temperature of the heat exchange branch 2 is 36.6 ℃ and the outlet temperature of the heat exchange branch 3 is 34.9 ℃.

As can be seen from the data in table 2, in the nominal refrigeration mode, the temperature difference between the maximum outlet temperature and the minimum outlet temperature in the second portion of the heat exchanger legs is only 4.9 ℃; in the intermediate refrigeration mode, the temperature difference between the maximum outlet temperature and the minimum outlet temperature in the second part of the heat exchanger branches is only 1.2 ℃; in the low temperature intermediate refrigeration mode, the temperature difference between the maximum outlet temperature and the minimum outlet temperature in the second portion of the heat exchanger legs is only 1.7 ℃.

Therefore, in the heat exchanger provided by the embodiment of the present disclosure, when in the rated refrigeration mode, the intermediate refrigeration mode and the low-temperature intermediate refrigeration mode, the outlet temperatures of the heat exchange branch 1, the heat exchange branch 2 and the heat exchange branch 3 of the second part of the heat exchanger branches are different from each other. It can be seen that, according to the heat exchanger provided by the embodiment of the present disclosure, when the number of the heat exchange branch circuits in the second heat exchange branch circuit is multiple, and the number of the liquid outlet pipes 22 is multiple, the uniformity of the amount of the refrigerant flowing into each liquid outlet pipe 22 is improved, and further, the heat exchange uniformity of the whole heat exchanger in different refrigeration modes is improved.

Optionally, each of the plurality of liquid outlet pipes 22 includes a first end extending into the liquid storage distribution chamber, wherein the first ends of the plurality of liquid outlet pipes 22 are spaced apart from the bottom shell 231 of the liquid storage housing 23 by the same distance.

The distances from the first ends of the liquid outlet pipes 22 to the bottom shell 231 of the liquid storage shell 23 are the same, so that the uniformity of the amount of the refrigerant flowing out through each liquid outlet pipe 22 is further improved. Optionally, the bottom shell 231 of the reservoir housing 23 is planar.

Optionally, the vertical distance from the first ends of the plurality of liquid outlet pipes 22 to the liquid inlet pipe 21 is the same.

The refrigerant flowing into the liquid storage shunting cavity through the liquid inlet pipe 21 is a high-pressure refrigerant, and the high-pressure refrigerant flows in the liquid storage shunting cavity to easily form turbulence. The vertical distances from the first ends of the liquid outlet pipes 22 to the liquid inlet pipe 21 are the same, so that the difference of the refrigerant quantity in each liquid outlet pipe 22 caused by refrigerant turbulence is further reduced, and the uniformity of the refrigerant quantity flowing out of each liquid outlet pipe 22 is improved. Fig. 6 is a schematic diagram of a liquid storage and distribution device in cross-section at a first end of a liquid outlet pipe. As shown in FIG. 6, the number of the liquid outlet pipes 22 is 3, and the vertical distances from the liquid outlet pipes 22 to the liquid inlet pipe 21 are d ₁ 、d ₂ 、d ₃ . Wherein d is ₁ ＝d ₂ ＝d ₃ 。

Optionally, the distance between each two adjacent liquid outlets 22 is equal.

Optionally, the heat exchanger further comprises a liquid separating device 3. The liquid separating device 3 comprises a confluence pipe orifice and a plurality of liquid separating branch pipes, wherein the liquid separating branch pipes are communicated with the heat exchange branch pipes in the first part of heat exchange branch pipes 4 one by one, and the confluence pipe orifice is communicated with the second end of a liquid inlet pipe 21 of the liquid storage and separating device 2.

The first part of heat exchange branches 4 comprise a plurality of heat exchange branches, and the plurality of heat exchange branches in the first part of heat exchange branches 4 are communicated in parallel when the air conditioner operates in a refrigeration mode. Divide a plurality of branch liquid pipes of liquid device 3 and the heat transfer branch road one-to-one intercommunication in the first part heat transfer branch road 4, converge the refrigerant that many heat transfer branch roads in the first part heat transfer branch road 4 flow out to the chamber that converges of liquid device 3 to through with converge the mouth of pipe of converging that the chamber is linked together with the refrigerant and flow to the stock solution reposition of redundant personnel intracavity of stock solution diverging device 2. Optionally, the volume of the liquid storage and flow distribution cavity is larger than the volume of the flow converging cavity.

Optionally, the liquid storage and diversion device 2 is arranged at the side part of the heat exchanger body 1.

In the using state of the heat exchanger, the liquid distribution device 3 and the liquid storage and distribution device 2 are both arranged on the side portion of the heat exchanger body 1, and the liquid distribution device 3 is arranged on the upper portion of the liquid storage and distribution device 2. Optionally, the outlet of each of the first part of heat exchange branches 4 is disposed at the upper part of the plurality of branch liquid dividing pipes of the liquid dividing device 3. Optionally, the first end of the liquid outlet pipe 22 is arranged at the upper part of the inlet of the heat exchange branch in the second partial heat exchange branch 5. Is beneficial to the flow of the refrigerant in the heat exchanger.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A heat exchanger, comprising:

the heat exchanger body is provided with a plurality of heat exchange branches; and (c) and (d),

the liquid storage and distribution device is arranged among the plurality of heat exchange branches and comprises a liquid storage shell, a liquid inlet pipe and a liquid outlet pipe, the liquid storage shell forms a liquid storage and distribution cavity, the first end of the liquid inlet pipe and the first end of the liquid outlet pipe are both communicated with the liquid storage and distribution cavity,

the liquid inlet pipe is communicated with a first part of heat exchange branches in the plurality of heat exchange branches, the liquid outlet pipe is communicated with a second part of heat exchange branches in the plurality of heat exchange branches, and the liquid storage and distribution device is used for partially storing the refrigerant flowing out of the first part of heat exchange branches in the liquid storage and distribution cavity, and then the refrigerant flows into the second part of heat exchange branches through the liquid outlet pipe.

2. The heat exchanger of claim 1,

the liquid storage shell comprises a bottom shell,

the liquid storage and distribution device comprises a liquid storage and distribution cavity, a liquid inlet pipe, a liquid outlet pipe and a bottom shell, wherein the first end of the liquid inlet pipe and the first end of the liquid outlet pipe both extend into the liquid storage and distribution cavity, and the distance from the first end of the liquid inlet pipe to the bottom shell is smaller than the distance from the first end of the liquid outlet pipe to the bottom shell.

3. The heat exchanger of claim 2,

the distance between the first end of the liquid inlet pipe and the bottom shell is greater than or equal to 10 millimeters.

4. The heat exchanger of claim 1,

the liquid inlet pipe is linear; and/or the presence of a gas in the atmosphere,

the liquid outlet pipe is linear.

5. The heat exchanger of claim 1,

the number of the liquid outlet pipes is multiple, the number of the heat exchange branches in the second part of heat exchange branches is multiple,

and the liquid outlet pipes are respectively communicated with the plurality of heat exchange branches in the second part of heat exchange branches one by one.

6. The heat exchanger of claim 5,

each liquid outlet pipe comprises a first end extending into the liquid storage and distribution cavity,

and the distances from the first ends of the liquid outlet pipes to the bottom shell of the liquid storage shell are the same.

7. The heat exchanger of claim 5,

the vertical distances from the first ends of the liquid outlet pipes to the liquid inlet pipes are the same.

8. The heat exchanger of any one of claims 1 to 7, further comprising:

the liquid separating device comprises a confluence pipe orifice and a plurality of liquid separating branch pipes,

the plurality of branch liquid distribution pipes are communicated with the heat exchange branches in the first part of heat exchange branches one by one, and the confluence pipe orifice is communicated with the second end of a liquid inlet pipe of the liquid storage and distribution device.

9. The heat exchanger of claim 1,

the liquid storage and distribution device is arranged on the side part of the heat exchanger body.

10. An air conditioner characterized by comprising the heat exchanger according to any one of claims 1 to 9.

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