CN218495436U - Heat exchanger - Google Patents

Abstract

The application relates to the technical field of air conditioners and discloses a heat exchange pipeline which comprises a first heat exchange branch and a second heat exchange branch which are communicated with each other; the liquid storage tank comprises a liquid storage shell, a liquid inlet pipe and a liquid outlet pipe, the liquid storage shell forms a liquid storage cavity, and the first end of the liquid inlet pipe and the first end of the liquid outlet pipe are both communicated with the liquid storage cavity; the liquid inlet pipe is communicated with the first heat exchange branch, the liquid outlet pipe is communicated with the second heat exchange branch, the liquid storage tank is used for carrying out gas-liquid separation and partial storage on the refrigerant flowing out of the first heat exchange branch in the liquid storage cavity, and the gaseous refrigerant flows into the second heat exchange branch through the liquid outlet pipe; wherein, the inner diameter of the liquid inlet pipe is Da, the inner diameter of the liquid outlet pipe is Db, and Db is more than or equal to Da. Therefore, the air conditioner has different amounts of refrigerants participating in refrigerant circulation when running under different loads, so that the air conditioner has the optimal running state under different loads, and in addition, the normal running of the refrigerant circulation in the heat exchanger can be ensured under the condition that the inner diameter of the liquid inlet pipe is larger than or equal to that of the liquid outlet pipe.

Description

Heat exchanger

Technical Field

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

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. For example, when an air conditioner refrigerates, the heat exchange coefficient of the condenser is larger, and the content of liquid refrigerant in the condenser is increased. However, at this time, the refrigerant flow rate required by the evaporator is small, that is, the actual refrigerant flow rate is larger than the refrigerant flow rate required by the system, thereby causing energy efficiency loss of the system.

The related technology discloses a refrigerant circulation flow self-adaptive system, wherein a refrigerant liquid storage tank is additionally arranged on a condenser, the pipeline structure in the condenser is redesigned, the gas-liquid components in the liquid storage tank are different under different working conditions, the liquid amounts stored in the liquid storage tank are also different, and the effective adjustment of the system circulation refrigerant amount is realized through the liquid storage tank through the reasonably designed liquid level position of an inlet and outlet pipeline.

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:

the sizes of the existing liquid storage tank, the inlet pipeline and the outlet pipeline are not favorable for the circulation flow of the refrigerant in the liquid storage tank.

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 and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.

The embodiment of the disclosure provides a heat exchanger to ensure the normal operation of refrigerant circulation in the heat exchanger.

In some embodiments, the heat exchanger comprises:

the heat exchange pipeline comprises a first heat exchange branch and a second heat exchange branch which are communicated;

the liquid storage tank comprises a liquid storage shell, a liquid inlet pipe and a liquid outlet pipe, wherein the liquid storage shell forms a liquid storage cavity, and the first end of the liquid inlet pipe and the first end of the liquid outlet pipe are both communicated with the liquid storage cavity;

the liquid inlet pipe is communicated with the first heat exchange branch, the liquid outlet pipe is communicated with the second heat exchange branch, the liquid storage tank is used for carrying out gas-liquid separation and partial storage on the refrigerant flowing out of the first heat exchange branch in the liquid storage cavity, and the gaseous refrigerant flows into the second heat exchange branch through the liquid outlet pipe;

the inner diameter of the liquid inlet pipe is Da, the inner diameter of the liquid outlet pipe is Db, and Db is larger than or equal to Da.

In some embodiments, the ratio of the inner diameter Da of the liquid inlet pipe to the inner diameter Db of the liquid outlet pipe is M, M = Db/Da, and 1. Ltoreq. M.ltoreq.2.

In some embodiments, the number of the liquid inlet pipes is one or more, and in the case that there are a plurality of liquid inlet pipes, da is the sum of the inner diameters of the plurality of liquid inlet pipes.

In some embodiments, the number of the liquid outlet pipes is one or more, and in the case that a plurality of liquid outlet pipes exist, db is the sum of the inner diameters of the plurality of liquid outlet pipes.

In some embodiments, the reservoir housing includes a bottom shell,

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

In some embodiments, the distance from the first end of the liquid inlet pipe to the bottom shell is greater than or equal to 10 mm.

In some embodiments, the reservoir housing comprises a top shell,

wherein, the feed liquor pipe with the drain pipe all runs through the epitheca, stretches into inside the stock solution chamber, just, the first end of drain pipe extremely the distance of epitheca is less than or equal to the first end of feed liquor pipe extremely the half of epitheca distance.

In some embodiments, the distance from the first end of the liquid outlet pipe to the top shell is greater than or equal to 5 mm.

In some embodiments, the liquid inlet pipe is linear; and/or the liquid outlet pipe is linear.

In some embodiments, the heat exchanger further comprises:

the heat exchanger body is provided with the heat exchange pipeline;

wherein, the liquid storage tank is arranged at the side part of the heat exchanger body.

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

when the heat exchanger provided by the embodiment of the disclosure is used as an outdoor heat exchanger, in a cooling mode, the compressor discharges high-temperature and high-pressure refrigerant to the outdoor heat exchanger, the refrigerant exchanges heat on the heat exchange pipeline, and when the refrigerant of the first heat exchange branch flows into the liquid storage cavity, part of the liquid refrigerant is stored, so that the refrigerant flow of the refrigerant circulation loop is reduced. Therefore, the running frequency of the compressor is reduced, and the energy efficiency loss of the air conditioner is reduced. Through the heat exchanger, the refrigerant quantity participating in refrigerant circulation when the air conditioner operates under different loads is different, the air conditioner has the optimal operation state under different loads, and in addition, the normal operation of refrigerant circulation in the heat exchanger can be ensured under the condition that the inner diameter of the liquid inlet pipe is larger than or equal to that of the liquid outlet pipe.

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 in the accompanying drawings, which correspond to the accompanying drawings and not in a limiting sense, in which elements having the same reference numeral designations represent like elements, and in which:

fig. 1 is a system schematic diagram of the air conditioner provided by the embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of the heat exchanger provided by the embodiment of the disclosure;

fig. 3 is a schematic view of another perspective of the heat exchanger provided by embodiments of the present disclosure.

Reference numerals:

10: a heat exchange line; 101: a first heat exchange branch; 102: a second heat exchange branch; 103: a heat exchanger body; 20: a liquid storage tank; 201: a liquid storage housing; 202: a liquid storage cavity; 203: a liquid inlet pipe; 204: a liquid outlet pipe; 205: a bottom case; 206: a top shell; 100: an indoor heat exchanger; 200: an outdoor heat exchanger; 300: a throttling device; 400: a compressor.

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 claims of the embodiments of the disclosure and in the drawings described above 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 "include" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on 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 in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. 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 disclosed embodiments 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 present disclosure provides an air conditioner, which includes an indoor heat exchanger 100, an outdoor heat exchanger 200, a throttling device 300, and a compressor 400, wherein the indoor heat exchanger 100, the outdoor heat exchanger 200, the throttling device 300, and the compressor 400 are connected by a refrigerant pipeline to form a refrigerant circulation loop, and the refrigerant passes through the refrigerant circulation loop along the set flow direction of different operation modes to realize different operation modes such as a cooling mode and a heating mode. The refrigeration modes of the air conditioner include different refrigeration operation modes such as rated refrigeration, intermediate refrigeration, low-temperature intermediate refrigeration, and the like, and the loads of the different refrigeration operation modes are different, so that the optimal refrigerant amount in the required refrigerant circulation circuit is also different.

The embodiment of the disclosure simultaneously provides a heat exchanger. The heat exchanger may be the indoor heat exchanger 100 or the outdoor heat exchanger 200 of the aforementioned air conditioner.

The following description will be made in detail in a cooling mode and a heating mode of the air conditioner operation, taking a heat exchanger as the outdoor heat exchanger 200 as an example. As shown in connection with figures 1 to 3.

Referring to fig. 1 to 3, a heat exchanger provided by the embodiment of the present disclosure includes a heat exchange pipeline 10 and a liquid storage tank 20. The heat exchange line 10 is in communication with the receiver 20, and refrigerant flows between the heat exchange line 10 and the receiver 20. The liquid storage tank 20 can store part of the refrigerant and provide a certain space for the gas-liquid separation of the two-phase refrigerant after flowing into the liquid storage tank 20, thereby achieving the effects of flow regulation and energy conservation.

The heat exchange pipeline 10 comprises a first heat exchange branch 101 and a second heat exchange branch 102 which are communicated with each other. The liquid storage tank 20 comprises a liquid storage shell 201, a liquid inlet pipe 203 and a liquid outlet pipe 204, wherein the liquid storage shell 201 forms a liquid storage cavity 202, and the first end of the liquid inlet pipe 203 and the first end of the liquid outlet pipe 204 are both communicated with the liquid storage cavity 202; the liquid inlet pipe 203 is communicated with the first heat exchange branch 101, the liquid outlet pipe 204 is communicated with the second heat exchange branch 102, the liquid storage tank 20 is used for performing gas-liquid separation and partial storage on the refrigerant flowing out of the first heat exchange branch 101 in the liquid storage cavity 202, and the gaseous refrigerant flows into the second heat exchange branch 102 through the liquid outlet pipe 204.

Refrigerant circulates between the first heat exchange branch 101, the receiver tank 20 and the second heat exchange branch 102. Under the refrigeration condition, the refrigerant in the first heat exchange branch 101 flows through the liquid inlet pipe 203 and flows into the liquid storage cavity 202, and then the gaseous refrigerant flows into the second heat exchange branch 102 through the liquid outlet pipe 204. Under the heating condition, the refrigerant in the second heat exchange branch 102 flows through the liquid outlet pipe 204 and flows into the liquid storage chamber 202, and then flows into the first heat exchange branch 101 through the liquid inlet pipe 203.

In addition, under the refrigeration condition, the two-phase refrigerant of the first heat exchange branch 101 flows into the liquid storage cavity 202 through the liquid inlet pipe 203, the liquid refrigerant is deposited at the bottom of the liquid storage cavity 202, and the gaseous refrigerant rises and is stored in the upper space of the liquid storage cavity 202.

Illustratively, both the inlet 203 and outlet 204 tubes extend from the top of the reservoir 20 into the reservoir 202. Alternatively, the reservoir housing 201 may be barrel shaped.

In this embodiment, the receiver 20 may be understood as partially storing the liquid refrigerant flowing out of the first heat exchange branch 101. For example, in a cooling condition, the refrigerant in the first heat exchange branch 101 of the outdoor heat exchanger 200 flows into the liquid storage chamber 202 of the liquid storage tank 20, and at this time, the gaseous refrigerant flows into the second heat exchange branch 102. When the liquid refrigerant in the liquid storage cavity 202 reaches above the liquid full line, the liquid refrigerant also flows into the second heat exchange branch 102, and the refrigerant lower than the liquid full line is stored in the liquid storage cavity 202 and does not enter the second heat exchange branch 102 of the outdoor heat exchanger 200, i.e., does not participate in the refrigerant circulation loop of the air conditioner.

Wherein, the inner diameter of the liquid inlet pipe 203 is Da, the inner diameter of the liquid outlet pipe 204 is Db, and Db is more than or equal to Da.

The size of Da and Db affects the flow rate of the refrigerant in the refrigerant cycle of the reservoir 202. No matter in a refrigerating working condition or a heating working condition, the liquid refrigerant in the liquid inlet pipe 203 has the refrigerant flow of the liquid outlet pipes 204, and the flow speed of liquid fluid in the same pipe diameter is higher than that of gas, so that the normal operation of refrigerant circulation in an air-conditioning system can be ensured by Db being more than or equal to Da.

When the heat exchanger provided by the embodiment of the present disclosure is used as the outdoor heat exchanger 200, in the cooling mode, the compressor 400 discharges a high-temperature and high-pressure refrigerant to the outdoor heat exchanger 200, the refrigerant exchanges heat on the heat exchange pipeline 10, and when the refrigerant of the first heat exchange branch 101 flows into the liquid storage cavity 202, a part of the liquid refrigerant is stored, so that the refrigerant flow of the refrigerant circulation loop is reduced. This reduces the operating frequency of the compressor 400 and reduces the energy efficiency loss of the air conditioner. Through the heat exchanger, the quantity of the refrigerants participating in refrigerant circulation when the air conditioner operates under different loads is different, the air conditioner has the optimal operation state under different loads, and in addition, the normal operation of refrigerant circulation in the heat exchanger can be ensured under the condition that the inner diameter of the liquid inlet pipe 203 is larger than or equal to that of the liquid outlet pipe 204.

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 circulation system, so that the refrigerant entering the evaporator through the throttling device 300 can fully exchange heat in the evaporator, and the operation energy efficiency ratio of the air conditioner is improved.

Optionally, the liquid inlet pipe 203 is a copper pipe having the same inner diameter and material as the first heat exchange branch 101. Similarly, liquid outlet pipe 204 is a copper pipe with the same inner diameter and material as those of second heat exchange branch 102.

Alternatively, the refrigerant may be a refrigerant.

Optionally, the ratio of the inner diameter Da of the liquid inlet pipe 203 to the inner diameter Db of the liquid outlet pipe 204 is M, M = Db/Da, and M is greater than or equal to 1 and less than or equal to 2.

Through M = Db/Da and 1 is more than or equal to M and less than or equal to 2, the phenomenon that the Db is too large is prevented, so that more liquid refrigerant is stored in the liquid storage device and is difficult to discharge, and the normal operation of a refrigerant cycle in the air conditioning system and the performance of the air conditioner are influenced.

Optionally, the number of the liquid inlet pipe 203 is one or more, and in case of a plurality of liquid inlet pipes 203, da is the sum of the inner diameters of the plurality of liquid inlet pipes 203.

In the case of a plurality of liquid inlet pipes 203, da is the sum of the inner diameters of the plurality of liquid inlet pipes 203, and it can be understood that the inner diameters of the plurality of liquid inlet pipes 203 may be the same or different, and only the ratio M between the inner diameters of the plurality of liquid inlet pipes 203 and the inner diameter of the liquid outlet pipe 204 satisfies the requirement.

Optionally, the number of effluent pipes 204 is one or more, and in case there are a plurality of effluent pipes 204, db is the sum of the inner diameters of the plurality of effluent pipes 204.

Under the condition that a plurality of liquid outlet pipes 204 exist, db is the sum of the inner diameters of the plurality of liquid outlet pipes 204, and it can be understood that the inner diameters of the plurality of liquid outlet pipes 204 can be the same or different, and only the ratio M between the inner diameters of the plurality of liquid outlet pipes 204 and the inner diameter of the liquid inlet pipe 203 meets the requirement.

Optionally, the number of the liquid inlet pipes 203 is multiple, and the number of the pipelines in the first heat exchange branch 101 is multiple, wherein the multiple liquid inlet pipes 203 are respectively communicated with the multiple pipelines in the first heat exchange branch 101 one by one, or the multiple liquid inlet pipes 203 are communicated with the first heat exchange branch 101 through a multi-way valve.

When the quantity of feed liquor pipe 203 is a plurality of, when the quantity of the heat transfer branch road in the first heat transfer branch road 101 is a plurality of, communicate one by one with a plurality of pipelines in the first heat transfer branch road 101 respectively through a plurality of feed liquor pipes 203, can reduce and flow out in the first heat transfer branch road 101, and the pressure of the refrigerant that gets into in the stock solution chamber 202 through feed liquor pipe 203, thereby the refrigerant turbulence problem that the high pressure refrigerant flowed in stock solution chamber 202 and caused, and then avoid the refrigerant of turbulent state directly to flow in the second heat transfer branch road 102 of heat exchanger through drain pipe 204, cause the unstability of the refrigerant circulation system of air conditioner.

When the number of the liquid inlet pipes 203 is multiple and the number of the heat exchange branches in the first heat exchange branch 101 is multiple, the multiple liquid inlet pipes 203 are communicated with the multiple pipelines of the first heat exchange branch 101 through the multi-way valve. Therefore, the pressure of the refrigerant flowing out of the first heat exchange branch 101 and flowing into the liquid storage cavity 202 through the liquid inlet pipe 203 can be reduced, and the flow rate of the refrigerant flowing into the liquid inlet pipe 203 can be improved, so that the pressure uniformity of the refrigerant in the liquid inlet pipes 203 is ensured, and the flow of the refrigerant in the liquid storage cavity 202 is facilitated.

Optionally, the number of the liquid outlet pipes 204 is plural, and the number of the pipes in the second heat exchange branch 102 is plural, wherein the plurality of liquid outlet pipes 204 are respectively communicated with the plurality of pipes in the second heat exchange branch 102 one by one, or the plurality of liquid outlet pipes 204 are communicated with the second heat exchange branch 102 through a multi-way valve.

When the number of the liquid outlet pipes 204 is multiple, and the number of the heat exchange branches in the second heat exchange branch 102 is multiple, when a high-pressure refrigerant flowing out of the first heat exchange branch 101 flows into the liquid storage cavity 202 through the liquid inlet pipe 203, the refrigerant amount flowing into the different liquid outlet pipes 204 is different due to turbulent motion of the refrigerant, so that the heat exchange capacity of the second heat exchange branch 102 of the heat exchanger is uneven, and the heat exchange uniformity of the heat exchanger is reduced.

Optionally, the liquid storage casing 201 includes a bottom shell 205, wherein the first end of the liquid inlet pipe 203 and the first end of the liquid outlet pipe 204 both extend into the liquid storage cavity 202, and a distance from the first end of the liquid inlet pipe 203 to the bottom shell 205 is smaller than a distance from the first end of the liquid outlet pipe 204 to the bottom shell 205.

The distance from the first end of the liquid inlet pipe 203 extending into the liquid storage cavity 202 to the bottom case 205 is smaller than the distance from the first end of the liquid outlet pipe 204 extending into the liquid storage cavity 202 to the bottom case 205, so that the liquid storage tank 20 can partially store the liquid refrigerant flowing into the liquid storage cavity 202 through the first end of the liquid inlet pipe 203, and after the liquid refrigerant reaches a liquid full line, the liquid refrigerant flows out of the liquid storage tank 20 through the liquid outlet pipe 204. Optionally, the fill line of reservoir 20 is the horizontal line at which the first end of outlet pipe 204 is located.

Optionally, the distance from the first end of the liquid inlet pipe 203 to the bottom shell 205 is greater than or equal to 10 mm.

When the refrigerant in the first heat exchange branch 101 flows into the reservoir 202 through the inlet pipe 203, the refrigerant flowing into the reservoir 202 may be turbulent due to the high pressure of the refrigerant, and if the turbulent refrigerant directly flows into the second heat exchange branch 102 of the heat exchanger through the outlet pipe 204, the refrigerant circulation system of the air conditioner may be unstable. The distance from the first end of the liquid inlet pipe 203 to the bottom shell 205 is greater than or equal to 10 mm, so that the impact of the high-pressure refrigerant on the bottom shell 205 of the liquid storage tank 20 is reduced, the turbulent motion phenomenon of the refrigerant in the liquid storage cavity 202 caused by the high-pressure refrigerant is reduced, the stability of the refrigerant flowing out through the liquid outlet pipe 204 is improved, and the stability of a refrigerant circulating system of the air conditioner is further improved.

When the number of the liquid outlet pipes 204 is multiple and the number of the heat exchange branches in the second heat exchange branch 102 is multiple, the distance from the first end of the liquid inlet pipe 203 to the bottom case 205 is greater than or equal to 10 mm, so that the impact between the high-pressure refrigerant and the bottom case 205 of the liquid storage tank 20 is reduced, the refrigerant turbulence phenomenon in the liquid storage cavity 202 caused by the high-pressure refrigerant is reduced, and the uniformity of the amount of the refrigerant flowing into each liquid outlet pipe 204 is improved.

Optionally, the first ends of the plurality of liquid outlets 204 are equidistant from the bottom shell 205 of the liquid storage housing 201.

The distances from the first ends of the liquid outlet pipes 204 to the bottom shell 205 of the liquid storage shell 201 are the same, so that the uniformity of the amount of the refrigerant flowing out of each liquid outlet pipe 204 is further improved. Optionally, the bottom shell 205 of the liquid storage casing 201 is flat.

Optionally, the liquid storage housing 201 includes a top shell 206, wherein the liquid inlet pipe 203 and the liquid outlet pipe 204 both penetrate the top shell 206 and extend into the liquid storage cavity 202, and a distance from a first end of the liquid outlet pipe 204 to the top shell 206 is less than or equal to one half of a distance from the first end of the liquid inlet pipe 203 to the top shell 206.

The liquid inlet pipe 203 and the liquid outlet pipe 204 penetrate through the top shell 206 and extend into the liquid storage cavity 202 from the top of the liquid storage tank 20, on one hand, liquid refrigerant in the liquid inlet pipe 203 can flow downwards under the action of gravity, loss caused by the fact that the refrigerant needs to work against the gravity is avoided, on the other hand, gaseous refrigerant in the liquid storage cavity 202 can move upwards conveniently, and then is discharged from the liquid outlet pipe 204 positioned at the top.

The distance from the first end of the liquid outlet pipe 204 to the top shell 206 is less than or equal to one half of the distance from the first end of the liquid inlet pipe 203 to the top shell 206, so that liquid drops on the liquid level of the liquid storage cavity 202 caused by high-pressure refrigerants can be prevented from splashing, and the liquid refrigerants enter the liquid outlet pipe 204. In addition, the liquid storage chamber 202 is also assisted in ascending the gaseous refrigerant to the liquid outlet pipe 204 for discharging.

Optionally, the distance from the first end of the effluent pipe 204 to the top shell 206 is greater than or equal to 5 millimeters.

In this embodiment, when the distance from the first end of the liquid outlet pipe 204 to the top shell 206 is less than or equal to one-half of the distance from the first end of the liquid inlet pipe 203 to the top shell 206, it is further defined that the distance from the first end of the liquid pipe 204 to the top shell 206 is greater than or equal to 5 mm, which facilitates the discharge of the gaseous refrigerant from the liquid outlet pipe 204, and prevents the droplets of the splashed liquid refrigerant from entering the liquid outlet pipe 204 as much as possible.

Optionally, the ratio of the inner length L to the inner diameter D of the liquid storage shell 201 is the length-diameter ratio S, S = L/D, and 1 ≦ S ≦ 20.

When the length-diameter ratio is too small, the liquid storage cavity 202 is narrow and high, the liquid level area of the refrigerant in the liquid storage cavity 202 is reduced, the separation effect of the gas-liquid two-phase refrigerant is affected, and meanwhile, the gravity center is unstable when a large amount of liquid is stored.

When draw ratio was too big, stock solution chamber 202 was the width short form, and the first end of drain pipe is apart from the liquid level undersize of the interior refrigerant of stock solution chamber 202, and when the gas-liquid two-phase refrigerant utilized gravity separation on vertical height, because of high low separation inadequately that leads to liquid refrigerant to get into the drain pipe along with gaseous state refrigerant, and the liquid drop that the liquid level splashes simultaneously also can get into the drain pipe, influences the result of use of heat exchanger.

In addition, when the inner diameter of the liquid outlet shell is large, the occupied area is large, so that the occupied area of the heat exchanger is influenced, and the practicability and the convenience of the heat exchanger in use are not facilitated.

When the length-diameter ratio of the liquid storage shell 201 in the embodiment is not less than 1 and not more than 20, the separation effect of the gas-liquid two-phase refrigerant can be ensured, so that the normal operation of the heat exchanger is ensured, and the stability and the practicability of the heat exchanger during operation can be improved.

Alternatively, in the case that the length-to-diameter ratio S gradually decreases from 20 to 1, the distance from the first end of the liquid outlet pipe 204 to the bottom shell 205 gradually increases, so that the gas-liquid two-phase refrigerant is separated from the liquid at the vertical height by gravity.

Under the condition that the length-diameter ratio S is gradually decreased from 20 to 1, the distance from the first end of the liquid outlet pipe 204 to the bottom shell 205 is gradually increased, so that the distance from the first end of the liquid outlet pipe 204 to the bottom shell 205 meets the vertical height required by gas-liquid two-phase refrigerant for gas-liquid separation under the action of gravity as far as possible, and the gas-liquid separation effect is enhanced. In addition, the liquid refrigerant can be prevented from dropping to the liquid surface as much as possible, and splashed liquid drops can be prevented from entering the liquid outlet pipe 204.

Optionally, the liquid inlet pipe 203 is linear; and/or, effluent channel 204 may be linear.

The straight inlet 203 and/or outlet 204 channels allow refrigerant to flow up and down the receiver 20, reducing refrigerant cycle instability due to high pressure refrigerant turbulence flowing directly into the outlet 204. Meanwhile, the linear liquid inlet pipe 203 and/or liquid outlet pipe 204 reduce the volume of the liquid inlet pipe 203 and/or liquid outlet pipe 204 in the liquid storage cavity 202, and further increase the effective liquid storage volume of the liquid storage cavity 202. Under the requirement that the effective liquid storage volume is the same, the volume of the liquid storage cavity 202 is reduced, and the volume of the heat exchanger is further reduced.

Optionally, in 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 heat exchange branch 101 is stored in the liquid storage cavity 202. In the rated refrigeration mode, the compressor 400 has a high frequency, a large refrigerant flow rate, and a large impact force, and the amount of the refrigerant stored in the liquid storage cavity 202 in the rated refrigeration mode is greater than the storage amount in 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 liquid storage cavity 202 under different loads by using the frequency of the compressor 400 and the flow and impact force of the refrigerant.

Optionally, the heat exchanger further comprises: a heat exchanger body 103 provided with a heat exchange pipeline 10; wherein, the liquid storage tank 20 is arranged at the side part of the heat exchanger body 103.

The heat exchange pipeline 10 penetrates through the heat exchanger body 103, and the refrigerant flows through the heat exchange pipeline 10 to exchange heat with the heat exchanger body 103 for cooling. The liquid storage tank 20 is located at the side of the heat exchanger body 103, and not only can store part of the refrigerant, but also can provide a certain space for facilitating gas-liquid separation of two-phase refrigerant, thereby achieving the effects of flow regulation and energy saving.

With reference to fig. 1 to 3, an embodiment of the present disclosure provides an air conditioner including the heat exchanger provided in the above embodiment.

The above description and the 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 exchange pipeline comprises a first heat exchange branch and a second heat exchange branch which are communicated;

the liquid storage tank comprises a liquid storage shell, a liquid inlet pipe and a liquid outlet pipe, wherein the liquid storage shell forms a liquid storage cavity, and the first end of the liquid inlet pipe and the first end of the liquid outlet pipe are both communicated with the liquid storage cavity;

the liquid inlet pipe is communicated with the first heat exchange branch, the liquid outlet pipe is communicated with the second heat exchange branch, the liquid storage tank is used for carrying out gas-liquid separation and partial storage on the refrigerant flowing out of the first heat exchange branch in the liquid storage cavity, and the gaseous refrigerant flows into the second heat exchange branch through the liquid outlet pipe;

the inner diameter of the liquid inlet pipe is Da, the inner diameter of the liquid outlet pipe is Db, and Db is larger than or equal to Da.

2. The heat exchanger of claim 1,

the ratio of the inner diameter Da of the liquid inlet pipe to the inner diameter Db of the liquid outlet pipe is M, M = Db/Da, and M is more than or equal to 1 and less than or equal to 2.

3. The heat exchanger of claim 1,

the number of the liquid inlet pipes is one or more, and in the case of a plurality of liquid inlet pipes, da is the sum of the inner diameters of the plurality of liquid inlet pipes.

4. The heat exchanger of claim 1,

the number of the liquid outlet pipes is one or more, and Db is the sum of the inner diameters of the liquid outlet pipes under the condition that the liquid outlet pipes exist.

5. The heat exchanger of claim 1,

the liquid storage shell comprises a bottom shell,

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

6. The heat exchanger of claim 5,

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

7. The heat exchanger of claim 1,

the liquid storage shell comprises a top shell,

wherein, the feed liquor pipe with the drain pipe all runs through the epitheca, stretches into inside the stock solution chamber, just, the first end of drain pipe extremely the distance of epitheca is less than or equal to the first end of feed liquor pipe extremely the half of epitheca distance.

8. The heat exchanger of claim 7,

the distance between the first end of the liquid outlet pipe and the top shell is greater than or equal to 5 millimeters.

9. The heat exchanger according to any one of claims 1 to 8,

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

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

the heat exchanger body is provided with the heat exchange pipeline;

wherein, the liquid storage tank is arranged at the side part of the heat exchanger body.

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