CN218296313U - Heat exchanger and air conditioner - Google Patents

Abstract

The application relates to the technical field of air conditioners, and discloses a heat exchanger, includes: a plurality of heat exchange branches; the liquid storage tank is arranged among the plurality of heat exchange branches; the first end of the liquid inlet pipe is communicated with the liquid storage tank, and the second end of the liquid inlet pipe is communicated with a first part of heat exchange branches in the plurality of heat exchange branches; a first end of the liquid outlet pipe is communicated with the liquid storage tank, and a second end of the liquid outlet pipe is communicated with a second part of the heat exchange branches in the plurality of heat exchange branches; and the enhancing part is arranged in the liquid storage tank and is used for extending the liquid level of the refrigerant in the liquid storage tank so as to enhance gas-liquid separation. Thus, the gas-liquid separation effect of the liquid storage tank is enhanced through the enhancing part. 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. 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, which results in 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 quantity stored in the liquid storage tank is also different, and the liquid level position of an inlet and outlet pipeline is reasonably designed, so that the effective adjustment of the system circulation refrigerant quantity is realized through the liquid storage tank.

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 gas-liquid separation effect of the refrigerant in the liquid storage tank is poor, and the gaseous refrigerant of the outlet pipeline of the liquid storage tank cannot meet the flow demand of the evaporator.

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, and solves the problem of poor gas-liquid separation effect in a liquid storage tank.

In some embodiments, the heat exchanger comprises:

a plurality of heat exchange branches;

the liquid storage tank is arranged among the plurality of heat exchange branches; the first end of the liquid inlet pipe is communicated with the liquid storage tank, and the second end of the liquid inlet pipe is communicated with a first part of heat exchange branches in the plurality of heat exchange branches; the first end of the liquid outlet pipe is communicated with the liquid storage tank, and the second end of the liquid outlet pipe is communicated with a second part of heat exchange branches in the plurality of heat exchange branches;

and the enhancing part is arranged in the liquid storage tank and is used for extending the liquid level of the refrigerant in the liquid storage tank so as to enhance gas-liquid separation.

Optionally, the reinforcement comprises a threaded rod comprising:

the two ends of the rod body are connected to the inner walls of the corresponding liquid storage tanks;

and the thread is arranged on the side surface of the rod body along the axial direction of the rod body so that the refrigerant forms a liquid film along the thread.

Optionally, the pitch of the thread is less than or equal to 1mm.

Optionally, the threaded rod is close to the bottom of the liquid storage tank and is positioned between 1/10 and 1/2 of the height of the liquid storage tank.

Optionally, the reinforcement portion comprises a plurality of the threaded rods, and the plurality of threaded rods are parallel to each other.

Optionally, the reinforcement portion comprises a slotted bar, the slotted bar comprising:

the two ends of the rod body are connected to the inner walls of the corresponding liquid storage tanks;

the fine grooves are formed around the side face of the rod body, and the fine grooves are staggered to form a net shape, so that the refrigerant forms a liquid film along the fine grooves.

Optionally, the slot width of the fine slot is less than or equal to 1mm.

Optionally, the slot stick is near the bottom of the liquid storage tank and is positioned between 1/10 and 1/2 of the height of the liquid storage tank.

Optionally, the reinforcing part comprises a plurality of the slotted bars, and the plurality of the slotted bars are parallel to each other.

In some embodiments, the air conditioner includes the heat exchanger of any of the above embodiments.

The heat exchanger and the air conditioner 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, a compressor discharges high-temperature and high-pressure refrigerant to the outdoor heat exchanger, and the refrigerant exchanges heat on a plurality of heat exchange branches. When the refrigerant of the first part of heat exchange branch flows into the liquid storage tank through the liquid inlet pipe, part of liquid refrigerant is stored, and therefore 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. And the liquid level of the refrigerant in the liquid storage tank is extended under the action of the reinforcing part, so that the gas-liquid separation of the refrigerant is enhanced, and more gaseous refrigerants are generated and flow to the second part heat exchanger branch and the indoor heat exchanger from the liquid outlet pipe in sequence. Therefore, the flow demand of the indoor heat exchanger can be met while the flow of the refrigerant is reduced.

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 view of a threaded rod disposed in a fluid reservoir provided by an embodiment of the present disclosure;

FIG. 2 is a schematic view of the threaded rod within the reservoir provided by embodiments of the present disclosure;

fig. 3 is a schematic structural view of a threaded rod provided by an embodiment of the present disclosure;

FIG. 4 is a schematic structural view of a slotted rod provided by an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a refrigerant circulation circuit of an air conditioner according to an embodiment of the disclosure;

FIG. 6 is a schematic illustration of an assembly of a second conduit and a tank provided by an embodiment of the present disclosure;

FIG. 7 is a schematic illustration of the assembly of a second conduit and a tank provided by an embodiment of the present disclosure;

FIG. 8 is a schematic illustration of the assembly of a second conduit and a tank provided by an embodiment of the present disclosure;

FIG. 9 is a schematic illustration of an assembly of a second conduit and a tank provided by an embodiment of the present disclosure.

Reference numerals are as follows:

100: an outdoor heat exchanger; 101: a first part of heat exchange branch; 102: a second part of heat exchange branch;

200: a liquid storage tank; 201: a liquid inlet pipe; 202: a liquid outlet pipe; 203: a liquid full line; 210: a threaded rod; 211: a thread; 220: a slotted rod; 221: a fine groove;

300: a compressor; 310: a flow control valve; 311: a first pipeline; 312: a second pipeline;

400: an indoor heat exchanger; 410: a throttling device.

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 as appropriate for the embodiments of the disclosure described herein. 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, 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 embodiments, and are not used 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 may be understood as specific cases by those of ordinary skill in the art.

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, which comprises an indoor heat exchanger 400, an outdoor heat exchanger 100, a throttling device 410 and a compressor 300, wherein the indoor heat exchanger 400, the outdoor heat exchanger 100, the throttling device 410 and the compressor 300 are connected through a refrigerant pipeline to form a refrigerant circulation loop, and a refrigerant passes through the refrigerant circulation loop along the set flow direction of different operation modes to realize different operation modes such as a refrigeration mode and a heating mode. The refrigeration modes of the air conditioner also 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 quantity in the required refrigerant circulation loop is also different.

The embodiment of the disclosure simultaneously provides a heat exchanger. The heat exchanger may be the indoor heat exchanger 400 or the outdoor heat exchanger 100 of the aforementioned air conditioner.

The following description will be made in detail by taking the heat exchanger as the outdoor heat exchanger 100 as an example under the condition that the air conditioner operates in a cooling mode.

In some embodiments, the heat exchanger includes a fluid reservoir 200, a booster, and a plurality of heat exchange legs. Wherein, the liquid storage tank 200 is arranged among the plurality of heat exchange branches; a first end of the liquid inlet pipe 201 is communicated with the liquid storage tank 200, and a second end of the liquid inlet pipe is communicated with a first part of heat exchange branches 101 in the plurality of heat exchange branches; a first end of the liquid outlet pipe 202 is communicated with the liquid storage tank 200, and a second end is communicated with a second part of heat exchange branches 102 in the plurality of heat exchange branches; the enhancing part is arranged in the liquid storage tank 200 and used for extending the liquid level of the refrigerant in the liquid storage tank 200 so as to enhance gas-liquid separation.

When the heat exchanger provided by the embodiment of the present disclosure is used as the outdoor heat exchanger 100, in the cooling mode, the compressor 300 discharges a high-temperature and high-pressure refrigerant to the outdoor heat exchanger 100, and the refrigerant exchanges heat on the plurality of heat exchange branches. When the refrigerant of the first part of the heat exchange branch 101 flows into the liquid storage tank 200 through the liquid inlet pipe 201, 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 300 and reduces the energy efficiency loss of the air conditioner. And the liquid level of the refrigerant in the liquid storage tank 200 is extended under the action of the enhancing part, so that the gas-liquid separation effect of the refrigerant is enhanced, and more gaseous refrigerant flows to the second part heat exchange branch 102 and the indoor heat exchanger 400 from the liquid outlet pipe 202 in sequence. Thus, the flow rate of the refrigerant is reduced and the flow rate requirement of the indoor heat exchanger 400 can be satisfied.

Alternatively, the liquid storage tank 200 is a tank structure having a liquid storage and distribution cavity, and can store part of the liquid refrigerant flowing in the external heat exchanger 100.

In this embodiment, it can be understood that the liquid refrigerant flowing out of the first partial heat exchange branch 101 is partially stored. For example, the first part of heat exchange branch 101 of the outdoor heat exchanger 100 flows into the liquid storage and diversion cavity of the liquid storage tank 200 through the liquid inlet pipe 201, at this time, the gaseous refrigerant may flow into the second part of heat exchange branch 102 through the liquid outlet pipe 202 of the liquid storage tank 200, when the liquid refrigerant in the liquid storage and diversion cavity reaches above the liquid full line 203, the liquid refrigerant may also flow into the second part of heat exchange branch 102 through the liquid outlet pipe 202, and the refrigerant lower than the liquid full line 203 may be stored in the liquid storage and diversion cavity, and does not enter the second part of heat exchange branch 102 of the outdoor heat exchanger 100, that is, does not participate in the refrigerant circulation loop of the air conditioner.

Illustratively, when the outdoor ambient temperature is relatively low, the air conditioner can meet the temperature requirement of the user without exerting the maximum cooling capacity of the air conditioner, such as an intermediate cooling mode or a low-temperature intermediate cooling mode of the air conditioner. The outdoor heat exchanger 100 provided by the embodiment of the disclosure can adjust the amount of the refrigerant flowing through the outdoor heat exchanger 100 itself, and adjust the amount of the refrigerant flowing into the refrigerant circulation loop, so that the refrigerant entering the evaporator through the throttling device 410 can fully exchange heat in the evaporator, thereby improving the operation energy efficiency ratio of the air conditioner.

Optionally, the liquid inlet pipe 201 is linear; and/or, the effluent channel 202 may be linear.

In this embodiment, the linear liquid inlet pipe 201 and/or liquid outlet pipe 202 reduces the volume of the liquid inlet pipe 201 and/or liquid outlet pipe 202 in the liquid storage and diversion cavity, thereby increasing the effective liquid storage volume of the liquid storage and diversion cavity. The volume of the reservoir 200 is reduced under the requirement of the same effective reservoir volume.

Optionally, as shown in fig. 1, a distance from a first end of the liquid inlet pipe 201 extending into the liquid storage and distribution cavity to the bottom surface of the liquid storage tank 200 is smaller than a distance from a first end of the liquid outlet pipe 202 extending into the liquid storage and distribution cavity to the bottom surface of the liquid storage tank 200, so that the liquid storage tank 200 can partially store the liquid refrigerant flowing into the liquid storage and distribution cavity through the first end of the liquid inlet pipe 201, and after reaching the liquid full line 203, the liquid refrigerant flows out of the liquid storage tank 200 through the liquid outlet pipe 202.

Optionally, as shown in fig. 3, the reinforcement comprises a threaded rod 210, the threaded rod 210 comprising a shaft and a thread 211. Wherein, two ends of the rod body are connected to the inner wall of the corresponding liquid storage tank 200; the screw thread 211 is arranged on the side surface of the rod body along the axial direction of the rod body, so that the refrigerant forms a liquid film along the screw thread 211.

In this embodiment, the two ends of the rod body are respectively connected to the inner wall of the liquid storage tank 200 through a bracket, so that the rod body is prevented from shaking in the liquid storage tank 200 under the action of the bracket. When the liquid level of the refrigerant is in contact with the threads 211 on the threaded rod 210, the refrigerant extends along the threads 211 to form a thin liquid film under the action of capillary force, so that the area of the liquid level of the refrigerant is enlarged, and the effect of enhancing gas-liquid separation of the refrigerant is achieved.

Optionally, the pitch of the thread 211 is less than or equal to 1mm. The effect of enhancing the gas-liquid separation of the refrigerant by the threaded rod 210 can be improved by controlling the thread pitch.

Alternatively, the threaded rod 210 is located near the bottom of the reservoir 200 and between 1/10 and 1/2 of the height of the reservoir 200. The liquid refrigerant is arranged at the lower part of the liquid storage tank 200, the gaseous refrigerant is arranged at the upper part of the liquid storage tank 200, and the effect of enhancing the gas-liquid separation of the refrigerant by the threaded rod 210 can be improved by controlling the setting height of the threaded rod 210 in the liquid storage tank 200.

Optionally, the reinforcement includes a plurality of threaded rods 210, and the plurality of threaded rods 210 are parallel to each other.

Illustratively, as shown in fig. 2, the reinforcement part includes two threaded rods 210, and the two threaded rods 210 are parallel to each other and located on the same horizontal plane. A gap is formed between the two threaded rods 210, two ends of each threaded rod 210 are fixed on the inner wall of the liquid storage tank 200 through a bracket, and the first end of the liquid inlet pipe 201 extends to the bottom of the liquid storage tank 200 through the gap between the two threaded rods 210.

As still another example, as shown in fig. 1, the reinforcement part includes two threaded rods 210, and the two threaded rods 210 are parallel to each other and located on the same vertical plane. A gap is formed between the two threaded rods 210, two ends of each threaded rod 210 are fixed on the inner wall of the liquid storage tank 200 through a support, and the first end of the liquid inlet pipe 201 extends to the bottom of the liquid storage tank 200 and is positioned on one side of the two threaded rods 210. Thus, as the liquid level of the refrigerant gradually rises, the two threaded rods 210 from bottom to top sequentially play a role in enhancing the gas-liquid separation of the refrigerant.

Alternatively, as shown in fig. 4, the reinforcement part comprises a slotted stick 220, and the slotted stick 220 comprises a stick body and a slot 221. Wherein, two ends of the rod body are connected to the inner wall of the corresponding liquid storage tank 200; the thin groove 221 is opened around the side of the rod body, and the thin grooves 221 are interlaced to form a net shape, so that the refrigerant forms a liquid film along the thin groove 221.

In this embodiment, the two ends of the rod body are respectively connected to the inner wall of the liquid storage tank 200 through a bracket, so that the rod body can be prevented from shaking in the liquid storage tank 200 under the action of the bracket. When the liquid surface of the refrigerant contacts the thin groove 221 of the thin groove rod 220, the refrigerant extends along the thin groove 221 to form a thin liquid film under the action of capillary force, so that the area of the liquid surface of the refrigerant is enlarged. The fine grooves 221 are staggered to form a mesh shape, so that the surface area of the liquid surface of the refrigerant is further enlarged, and the gas-liquid separation of the refrigerant is enhanced.

Optionally, the slot width of the fine slot 221 is less than or equal to 1mm. The groove width can be controlled to improve the effect of enhancing the gas-liquid separation of the refrigerant by the narrow groove rod 220.

Optionally, the slot stick 220 is located near the bottom of the reservoir 200 and between 1/10-1/2 of the height of the reservoir 200. The liquid refrigerant is arranged at the lower part of the liquid storage tank 200, the gaseous refrigerant is arranged at the upper part of the liquid storage tank 200, and the gas-liquid separation effect of the refrigerant can be enhanced by the thin groove rod 220 by controlling the arrangement height of the thin groove rod 220 in the liquid storage tank 200.

Optionally, the reinforcement portion comprises a plurality of slotted bars 220, and the plurality of slotted bars 220 are parallel to each other.

Illustratively, the reinforcement includes two slotted bars 220, the two slotted bars 220 being parallel to each other and located on the same horizontal plane. A gap is formed between the two thin groove rods 220, two ends of each thin groove rod 220 are fixed on the inner wall of the liquid storage tank 200 through brackets, and the first end of the liquid inlet pipe 201 extends to the bottom of the liquid storage tank 200 through the gap between the two thin groove rods 220.

Yet another example, the reinforcement portion includes two slotted bars 220, the two slotted bars 220 being parallel to each other and lying on the same vertical plane. A gap is formed between the two thin groove rods 220, two ends of each thin groove rod 220 are fixed on the inner wall of the liquid storage tank 200 through a support, and the first end of the liquid inlet pipe 201 extends to the bottom of the liquid storage tank 200 and is positioned at one side of the two thin groove rods 220. Thus, as the liquid level of the refrigerant gradually rises, the two thin grooved bars 220 from bottom to top sequentially play a role in enhancing the gas-liquid separation of the refrigerant.

Alternatively, as shown in fig. 5, the discharge port of the compressor 300 is communicated with the flow control valve 310, the flow control valve 310 is respectively communicated with the inlet of the outdoor heat exchanger 100 through a first pipeline 311 and a second pipeline 312, so that the compressor 300 discharges the refrigerant to the outdoor heat exchanger 100, and the flow control valve 310 is used for adjusting the flow rates of the first pipeline 311 and the second pipeline 312; and, the second pipe 312 is in contact with the liquid storage tank 200 to heat the refrigerant in the liquid storage tank 200.

In the present embodiment, in the cooling mode, the compressor 300 discharges the high-temperature and high-pressure refrigerant to the flow control valve 310. The refrigerant of the flow control valve 310 has two outflow paths, one of which flows to the outdoor heat exchanger 100 through a first pipe 311, and the other of which flows to the outdoor heat exchanger 100 through a second pipe 312. When the flow control valve 310 controls the second pipeline 312 to be blocked and all the refrigerant flows from the first pipeline 311 to the outdoor heat exchanger 100, the refrigerant exchanges heat on the plurality of heat exchange branches and stores part of the liquid refrigerant through the liquid storage tank 200, thereby reducing the refrigerant flow of the refrigerant circulation loop. Thus, the operation frequency of the compressor 300 is reduced, the energy efficiency loss of the air conditioner is reduced, and the air conditioner is suitable for the low-load working condition in the refrigeration mode. When the flow control valve 310 controls a portion of the refrigerant to flow from the first pipeline 311 to the outdoor heat exchanger 100 and a portion of the refrigerant to flow from the second pipeline 312 to the outdoor heat exchanger 100, the second pipeline 312 heats the refrigerant in the receiver 200 while the receiver 200 stores the liquid refrigerant, thereby enhancing gas-liquid separation of the refrigerant in the receiver 200. When the second pipeline 312 is blocked, the refrigerant flow of the refrigerant circulation loop is increased, so that the refrigerant flow requirement of the indoor heat exchanger 400 is met, and the refrigerant circulation loop is suitable for a high-load working condition in a refrigeration mode.

Optionally, the flow control valve 310 is provided with a temperature sensing component for monitoring the degree of superheat of the exhaust gas according to the compressor 300; and the flow control valve 310 adjusts the flow rates of the first line 311 and the second line 312 according to the degree of superheat of the exhaust gas.

In the present embodiment, the discharge superheat degree is calculated from the discharge temperature of the compressor 300 and the refrigerant temperature of the outdoor heat exchanger 100. The flow control valve 310 works like a thermostatic expansion valve, obtains the exhaust superheat degree through a temperature sensing assembly, and adjusts the flow of the first pipeline 311 and the second pipeline 312 according to the exhaust superheat degree.

Alternatively, when the discharge superheat of the compressor 300 is less than or equal to the upper superheat limit, the flow control valve 310 controls the second pipeline 312 to be blocked, so that all the refrigerant flows to the outdoor heat exchanger 100 through the first pipeline 311. Thus, the refrigerant exchanges heat on the plurality of heat exchange branches and stores part of the liquid refrigerant through the liquid storage tank 200, thereby reducing the refrigerant flow of the refrigerant circulation loop. This reduces the operating frequency of the compressor 300 and reduces the energy efficiency loss of the air conditioner.

Optionally, when the discharge superheat of the compressor 300 is greater than the upper superheat limit, the flow control valve 310 controls the second pipeline 312 to be communicated, and the flow ratio is less than or equal to 10%.

In this embodiment, most of the refrigerant flows from the first pipe line 311 to the outdoor heat exchanger 100, and a small portion of the refrigerant flows from the second pipe line 312 to the outdoor heat exchanger 100. The second pipe 312 heats the refrigerant in the receiver 200 while the receiver 200 stores the liquid refrigerant, thereby enhancing the gas-liquid separation of the refrigerant in the receiver 200. Thus, the refrigerant flow rate of the refrigerant circulation circuit is increased to meet the refrigerant flow rate requirement of the indoor heat exchanger 400, relative to the case that the exhaust superheat degree is less than or equal to the superheat degree upper limit. When the exhaust superheat degree is decreased to be less than or equal to the upper superheat degree limit, the flow control valve 310 controls all the refrigerant to flow from the first pipeline 311 to the outdoor heat exchanger 100.

Illustratively, when the degree of superheat of the discharge air is greater than the upper limit of the degree of superheat, the flow control valve 310 controls 10% of the refrigerant to flow from the second pipeline 312 to the outdoor heat exchanger 100, and 90% of the refrigerant to flow from the first pipeline 311 to the outdoor heat exchanger 100. The second pipe 312 heats the refrigerant in the receiver 200 while the receiver 200 stores the liquid refrigerant, thereby enhancing the gas-liquid separation of the refrigerant in the receiver 200. When the discharge superheat degree is decreased to be less than the upper superheat degree limit, the flow control valve 310 controls 100% of the refrigerant to flow from the first pipeline 311 to the outdoor heat exchanger 100.

Optionally, the plurality of heat exchange branches of the outdoor heat exchanger 100 includes a first part heat exchange branch 101 and a second part heat exchange branch 102, and the first part heat exchange branch 101 is disposed on the upper portion of the second part heat exchange branch 102. The first end of the liquid inlet pipe 201 is communicated with the liquid storage tank 200, and the second end is communicated with the first part heat exchange branch 101; a first end of the liquid outlet pipe 202 is communicated with the liquid storage tank 200, and a second end is communicated with the second part heat exchange branch 102; in the cooling mode of the air conditioner, the first part heat exchange branch 101 and the second part heat exchange branch 102 are connected in series, and the flow sequence of the refrigerant in the outdoor heat exchanger 100 is that the refrigerant flows into the liquid storage tank 200 from the first part heat exchange branch 101 and the liquid inlet pipe 201, and then flows into the second part heat exchange branch 102 from the liquid outlet pipe 202.

Optionally, a portion of the second conduit 312 extends through the tank 200. In this way, when the flow control valve 310 controls a portion of the refrigerant to flow from the second pipe 312 to the outdoor heat exchanger 100, the refrigerant in the receiver 200 is heated by the pipe section of the second pipe 312 located in the receiver 200.

Alternatively, the second conduit 312 extends through a lower portion of the sidewall of the storage tank 200, and the pipe segments located within the storage tank 200 are configured as straight lines.

In this embodiment, two corresponding assembling holes are formed on two sides of the lower sidewall of the liquid storage tank 200, and a sealing pad is disposed in each assembling hole. The second pipe 312 is inserted into the liquid storage tank 200 through two assembling holes, and the gasket is used to prevent the refrigerant in the liquid storage tank 200 from leaking from the assembling holes, and then the second pipe 312 is fixed to the sidewall of the liquid storage tank 200 by a fastening member such as a nut.

Alternatively, as shown in FIG. 7, the second pipeline 312 extends through the bottom surface of the storage tank 200, and the pipe segment located in the storage tank 200 is configured in a U-shape with the opening facing downward.

In this embodiment, two assembling holes are respectively formed on two sides of the bottom surface of the liquid storage tank 200, and a sealing pad is disposed in each assembling hole. The second pipe 312 is inserted into the liquid storage tank 200 through two assembling holes, the gasket is used to prevent the refrigerant in the liquid storage tank 200 from leaking from the assembling holes, and then the second pipe 312 is fixed to the bottom surface of the liquid storage tank 200 by a fastening member such as a nut. The U-shaped design increases the length of the second pipeline 312 in the liquid storage tank 200, thereby increasing the heat exchange area, and is beneficial to enhancing the gas-liquid separation in the liquid storage tank 200 when the flow control valve 310 controls part of the refrigerant to flow from the second pipeline 312 to the outdoor heat exchanger 100.

Optionally, as shown in FIG. 9, the surface of the section of the second conduit 312 located within the storage tank 200 is provided with threads 211. Thus, along with the rise of the liquid level in the liquid storage tank 200, the liquid extends along the thread 211 under the action of capillary force when the liquid level is contacted with the second pipeline 312, the area of the liquid level of the liquid is increased, and the gas-liquid separation in the liquid storage tank 200 is favorably enhanced.

Optionally, a portion of the second pipeline 312 abuts against a bottom surface of the outside of the tank 200.

Illustratively, the bottom surface of the exterior of the liquid storage tank 200 is provided with a pipe clamp, the second pipeline 312 is fixed on the bottom surface of the liquid storage tank 200 through the pipe clamp, and the second pipeline 312 transfers heat to the liquid in the liquid storage tank 200 through the bottom surface of the liquid storage tank 200.

As another example, a portion of the second pipeline 312 is coiled in a plurality of turns on the same plane, and then fixed to the bottom surface of the storage tank 200 by a pipe clamp. Thus, the contact area between the second pipeline 312 and the bottom surface of the liquid storage tank 200 can be increased by winding the sampling coil, and the heat transfer effect can be improved.

Alternatively, as shown in FIG. 8, a portion of the second conduit 312 may be wrapped around the outside of the tank 200. The second pipe 312 is fixed to a side surface of the liquid storage tank 200 by a pipe clip after being wound, and transfers heat to the liquid in the liquid storage tank 200 through the side surface of the liquid storage tank 200.

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:

a plurality of heat exchange branches;

the liquid storage tank (200) is arranged among the plurality of heat exchange branches; a first end of the liquid inlet pipe (201) is communicated with the liquid storage tank (200), and a second end of the liquid inlet pipe is communicated with a first part of heat exchange branches (101) in the plurality of heat exchange branches; a first end of the liquid outlet pipe (202) is communicated with the liquid storage tank (200), and a second end of the liquid outlet pipe is communicated with a second part of heat exchange branches (102) in the plurality of heat exchange branches;

and the enhancing part is arranged in the liquid storage tank (200) and is used for extending the liquid level of the refrigerant in the liquid storage tank (200) so as to enhance gas-liquid separation.

2. The heat exchanger of claim 1, wherein the augment comprises a threaded rod (210), the threaded rod (210) comprising:

the two ends of the rod body are connected to the inner walls of the corresponding liquid storage tanks (200);

and the thread (211) is arranged on the side surface of the rod body along the axial direction of the rod body, so that the refrigerant forms a liquid film along the thread (211).

3. The heat exchanger of claim 2,

the pitch of the thread (211) is less than or equal to 1mm.

4. The heat exchanger according to claim 2 or 3,

the threaded rod (210) is close to the bottom of the liquid storage tank (200) and is positioned between 1/10 and 1/2 of the height of the liquid storage tank (200).

5. The heat exchanger according to claim 2 or 3,

the reinforcing part includes a plurality of the threaded rods (210), and the plurality of the threaded rods (210) are parallel to each other.

6. The heat exchanger of claim 1, wherein the reinforcement comprises a slotted rod (220), the slotted rod (220) comprising:

the two ends of the rod body are connected to the inner walls of the corresponding liquid storage tanks (200);

the thin grooves (221) are formed around the side face of the rod body, and the thin grooves (221) are staggered to form a net shape, so that a refrigerant forms a liquid film along the thin grooves (221).

7. The heat exchanger of claim 6,

the width of the narrow groove (221) is less than or equal to 1mm.

8. The heat exchanger according to claim 6 or 7,

the thin groove rod (220) is close to the bottom of the liquid storage tank (200) and is positioned between 1/10 and 1/2 of the height of the liquid storage tank (200).

9. Heat exchanger according to claim 6 or 7,

the reinforcing part includes a plurality of the slotted rods (220), and the plurality of the slotted rods (220) are parallel to each other.

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

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