CN218495415U - 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 exchange pipeline comprises a condensation section; the liquid storage and gas collection tank is arranged at the condensation section and is provided with a first inlet and outlet pipe, a second inlet and outlet pipe and a third inlet and outlet pipe; first ends of the first inlet-outlet pipe and the third inlet-outlet pipe are communicated with the liquid storage and gas collection tank, second ends of the first inlet-outlet pipe and the third inlet-outlet pipe are communicated with a part of the condensation section, and the first inlet-outlet pipe and the third inlet-outlet pipe are in parallel connection; the first end of the second inlet and outlet pipe is communicated with the liquid storage and gas collection tank, and the second end of the second inlet and outlet pipe is communicated with the other part of the condensation section; and the distance from the first end of the first inlet and outlet pipe to the bottom of the liquid storage and gas collection tank is equal to the distance from the first end of the third inlet and outlet pipe to the bottom of the liquid storage and gas collection tank, and the distance from the first end of the first inlet and outlet pipe to the bottom of the liquid storage and gas collection tank is smaller than the distance from the first end of the second inlet and outlet pipe to the bottom of the liquid storage and gas collection tank. 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 operating ambient temperatures and different loads. For example, when an air conditioner refrigerates, the heat exchange coefficient of the condenser is large, and the content of the 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.

In the related art, a refrigerant storage device is generally arranged between an indoor heat exchanger and an outdoor heat exchanger, and electromagnetic valves and capillary tubes are arranged at two ends of the refrigerant storage device to control the flow of the refrigerant, so that the refrigerant storage device plays a role in storing the refrigerant.

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:

because the electromagnetic valves and the capillary tubes are needed to be arranged at the two ends of the refrigerant storage device to control the refrigerant flow, the pipeline cost is high, the control is complex, and the system reliability is poor. Moreover, the refrigerant storage device has a single function and can only be used for storing liquid.

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 and an air conditioner, and solves the problems of high pipeline cost, complex control, poor system reliability and single function of a refrigerant storage device.

In some embodiments, the heat exchanger comprises:

the heat exchange pipeline comprises a condensation section;

the liquid storage and gas collection tank is arranged at the condensation section and is provided with a first inlet and outlet pipe, a second inlet and outlet pipe and a third inlet and outlet pipe; first ends of the first inlet and outlet pipe and the third inlet and outlet pipe are communicated with the liquid storage and gas collection tank, second ends of the first inlet and outlet pipe and the third inlet and outlet pipe are communicated with a part of the condensation section, and the first inlet and outlet pipe and the third inlet and outlet pipe are in parallel connection; the first end of the second inlet and outlet pipe is communicated with the liquid storage and gas collection tank, and the second end of the second inlet and outlet pipe is communicated with the other part of the condensation section;

and the distance from the first end of the first inlet and outlet pipe to the bottom of the liquid storage and gas collection tank is equal to the distance from the first end of the third inlet and outlet pipe to the bottom of the liquid storage and gas collection tank, and the distance from the first end of the first inlet and outlet pipe to the bottom of the liquid storage and gas collection tank is smaller than the distance from the first end of the second inlet and outlet pipe to the bottom of the liquid storage and gas collection tank.

Optionally, the first inlet and outlet pipe, the second inlet and outlet pipe, and the third inlet and outlet pipe are vertically arranged, the first inlet and outlet pipe and the third inlet and outlet pipe are located on one side of the liquid storage gas collecting tank, and the second inlet and outlet pipe is located on the other side of the liquid storage gas collecting tank.

Optionally, the first inlet and outlet pipe, the second inlet and outlet pipe, and the third inlet and outlet pipe are all vertically arranged, and the second inlet and outlet pipe is located between the first inlet and outlet pipe and the second inlet and outlet pipe.

Optionally, the liquid storage and gas collection tank comprises a top cover;

the first inlet and outlet pipe, the second inlet and outlet pipe and the third inlet and outlet pipe extend into the liquid storage and gas collection tank from the top cover.

Optionally, the first end of the first inlet and outlet pipe and the first end of the third inlet and outlet pipe are close to the lower part of the liquid storage and gas collection tank.

Optionally, the first end of the second inlet and outlet pipe is close to the upper part of the liquid storage and gas collection tank.

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

Optionally, the heat exchanger is used as an outdoor unit of the air conditioner.

Optionally, when the air conditioner operates in the refrigeration mode, a refrigerant flows into the liquid storage and gas collection tank from the first inlet and outlet pipe and flows out of the liquid storage and gas collection tank from the second inlet and outlet pipe.

Optionally, when the air conditioner operates in the heating mode, the refrigerant flows into the liquid storage and gas collection tank from the second inlet and outlet pipe, and flows out of the liquid storage and gas collection tank from the first inlet and outlet pipe and the third inlet and outlet pipe.

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

the liquid storage and gas collection tank has the functions of liquid storage and gas collection. When the heat exchanger is used as a condenser, the refrigerant enters the liquid storage and gas collection tank from the first inlet and outlet pipe and the third inlet and outlet pipe which are connected in parallel to realize liquid collection, and then flows out of the liquid storage and gas collection tank from the second inlet and outlet pipe. Because the first end of the first inlet and outlet pipe and the first end of the second inlet and outlet pipe have a height difference, the volume of the liquid storage and gas collection tank corresponding to the height difference can store the refrigerant, and therefore the refrigerant flow of the system is reduced. In addition, when the heat exchanger is used as an evaporator, the refrigerant enters the liquid storage and gas collection tank from the second inlet and outlet pipe and then flows out of the liquid storage and gas collection tank from the first inlet and outlet pipe and the third inlet and outlet pipe which are connected in parallel to realize shunting. At the moment, the refrigerant in the liquid storage and gas collection tank is less, and most of the refrigerant is discharged through the first inlet and outlet pipe and the third inlet and outlet pipe, so that the refrigerant flow of the system is increased. Therefore, the refrigerant flow of the refrigerant circulation loop is self-adaptively adjusted through the liquid storage and gas collection tank under different working conditions and loads, the structure is simple, the cost is low, control is not needed, and the system reliability is high.

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 structural diagram of a heat exchanger provided by an embodiment of the present disclosure;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic structural diagram of a semiconductor refrigeration device provided by an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a heating coil provided in the embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a phase change heat storage material provided by an embodiment of the disclosure;

fig. 6 is a schematic structural diagram of a fin provided in an embodiment of the present disclosure.

Reference numerals are as follows:

100: a liquid storage and gas collection tank; 101: a first inlet pipe and a first outlet pipe; 102: a second inlet and outlet pipe; 103: a third inlet and outlet pipe; 110: a semiconductor refrigeration device; 120: a heating coil; 130: a fin; 140: a phase change heat storage material;

200: a heat exchanger; 201: a first heat exchange path; 202: a second heat exchange path; 210: a first main pipeline; 211: a second main pipeline; 220: a first shunt element.

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 examples and are not intended to limit the devices, elements or components indicated 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 orientation or position, for example, the term "on" may also be used to indicate some kind of attachment or connection 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.

Referring to fig. 1 to 6, an embodiment of the present disclosure provides a heat exchanger 200, which includes a heat exchange pipeline, a liquid storage and gas collection tank 100. Wherein, the heat exchange pipeline comprises a condensing section; the liquid storage and gas collection tank 100 is arranged at the condensation section and is provided with a first inlet and outlet pipe 101, a second inlet and outlet pipe 102 and a third inlet and outlet pipe 103; first ends of the first inlet and outlet pipe 101 and the third inlet and outlet pipe 103 are communicated with the liquid storage and gas collection tank 100, second ends of the first inlet and outlet pipe 101 and the third inlet and outlet pipe 103 are communicated with a part of the condensation section, and the first inlet and outlet pipe 101 and the third inlet and outlet pipe 103 are in parallel connection; a first end of a second inlet and outlet pipe 102 is communicated with the liquid storage and gas collection tank 100, and a second end of the second inlet and outlet pipe is communicated with the other part of the condensation section; moreover, the distance from the first end of the first inlet and outlet pipe 101 to the bottom of the liquid storage and gas collection tank 100 is equal to the distance from the first end of the third inlet and outlet pipe 103 to the bottom of the liquid storage and gas collection tank 100, and the distance from the first end of the first inlet and outlet pipe 101 to the bottom of the liquid storage and gas collection tank 100 is less than the distance from the first end of the second inlet and outlet pipe 102 to the bottom of the liquid storage and gas collection tank 100.

By adopting the heat exchanger 200 provided by the embodiment of the disclosure, the liquid storage and gas collection tank 100 not only plays a role of liquid storage but also plays a role of gas collection pipe. When the heat exchanger 200 is used as a condenser, refrigerant enters the liquid storage and gas collection tank 100 from the first inlet and outlet pipe 101 and the third inlet and outlet pipe 103 which are connected in parallel to realize liquid collection, and then flows out of the liquid storage and gas collection tank 100 from the second inlet and outlet pipe 102. Because a height difference exists between the first end of the first inlet and outlet pipe 101 and the first end of the second inlet and outlet pipe 102, the volume of the liquid and gas storage tank 100 corresponding to the height difference can store the refrigerant, thereby reducing the refrigerant flow of the system. Moreover, the liquid storage and gas collection tank 100 is arranged in the condensing section, and compared with the supercooling section, the refrigerant storage capacity of the liquid storage and gas collection tank is a fixed value in the supercooling section, and the refrigerant storage capacity of the condensing section is matched with the dryness of the condensing section at the setting position, so that the liquid storage and gas collection tank can be matched with the refrigerant flow under different loads. In addition, when the heat exchanger 200 is used as an evaporator, the refrigerant enters the liquid storage and gas collection tank 100 from the second inlet/outlet pipe 102, and then flows out of the liquid storage and gas collection tank 100 from the first inlet/outlet pipe 101 and the third inlet/outlet pipe 103 which are connected in parallel to achieve flow distribution. At this time, the liquid storage and gas collection tank 100 has less refrigerant, and most of the refrigerant is discharged through the first inlet and outlet pipe 101 and the third inlet and outlet pipe 103, thereby increasing the refrigerant flow rate of the system. Therefore, the refrigerant flow of the refrigerant circulation loop is self-adaptively adjusted through the liquid storage and gas collection tank 100 under different working conditions and loads, the structure is simple, the cost is low, control is not needed, and the system reliability is high.

Optionally, the heat exchange pipeline includes a first main pipeline 210, a second main pipeline 211, a first heat exchange path 201, and a second heat exchange path 202. Wherein a first end of the first heat exchange passage 201 and a first end of the second heat exchange passage 202 are communicated with the first flow dividing element 220, and a second end of the first heat exchange passage 201 and a second end of the second heat exchange passage 202 are communicated with the second flow dividing element; first shunt element 220 is in communication with first main conduit 210 and second shunt element is in communication with second main conduit 211.

In the present embodiment, as shown in fig. 1 and fig. 2, the first shunt element 220 is a shunt element having a normal shunt function, and the second shunt element is the liquid storage and gas collection tank 100. A second end of the first inlet/outlet pipe 101 is communicated with the first heat exchange passage 201, a second end of the third inlet/outlet pipe 103 is communicated with the second heat exchange passage 202, and a second end of the second inlet/outlet pipe 102 is communicated with the second main pipe 211. When the heat exchanger 200 is used as a condenser, the refrigerant enters the first flow dividing element 220 from the first main pipeline 210; then, the heat exchange tube is divided into two paths, one path of the heat exchange tube sequentially enters the liquid storage and gas collection tank 100 through a first heat exchange passage 201 and a first inlet and outlet tube 101, and the other path of the heat exchange tube sequentially enters the liquid storage and gas collection tank 100 through a second heat exchange passage 202 and a third inlet and outlet tube 103; finally, the refrigerant in the liquid storage and gas collection tank 100 flows out of the heat exchanger 200 through the second inlet and outlet pipe 102 and the second main pipeline 211 in sequence. When the heat exchanger 200 is used as an evaporator, the refrigerant sequentially enters the liquid storage and gas collection tank 100 through the second main pipeline 211 and the second inlet and outlet pipe 102; then, the refrigerant in the liquid storage and gas collection tank 100 is divided into two paths, one path of refrigerant sequentially enters the first shunting element 220 through the first inlet and outlet pipe 101 and the first heat exchange passage 201, and the other path of refrigerant sequentially enters the first shunting element 220 through the third inlet and outlet pipe 103 and the second heat exchange passage 202; finally, the refrigerant of the first flow dividing element 220 flows out of the heat exchanger 200 through the first main pipeline 210.

Optionally, the first inlet and outlet pipe 101, the second inlet and outlet pipe 102 and the third inlet and outlet pipe 103 are all vertically arranged, the first inlet and outlet pipe 101 and the third inlet and outlet pipe 103 are located on one side of the liquid storage and gas collection tank 100, and the second inlet and outlet pipe 102 is located on the other side of the liquid storage and gas collection tank 100.

Optionally, the first inlet and outlet pipe 101, the second inlet and outlet pipe 102, and the third inlet and outlet pipe 103 are all vertically disposed, and the second inlet and outlet pipe 102 is located between the first inlet and outlet pipe 101 and the second inlet and outlet pipe 102.

In the above embodiment, the first inlet and outlet pipe 101, the second inlet and outlet pipe 102 and the third inlet and outlet pipe 103 are all vertically arranged, which is beneficial to the inflow and outflow of the refrigerant, and reduces the stroke of the refrigerant in the liquid storage and gas collection tank 100.

Optionally, the liquid storage and gas collection tank 100 includes a top cover; the first inlet and outlet pipe 101, the second inlet and outlet pipe 102 and the third inlet and outlet pipe 103 extend into the liquid storage and gas collection tank 100 from the top cover.

In this embodiment, the top cover is provided with insertion holes corresponding to the first inlet/outlet pipe 101, the second inlet/outlet pipe 102, and the third inlet/outlet pipe 103, respectively, and the three inlet/outlet pipes extend into the liquid storage/gas collection tank 100 through the corresponding insertion holes. And the sealing rings are arranged in the insertion holes, so that the sealing performance of the three inlet and outlet pipes after extending into the liquid storage and gas collection tank 100 is ensured, and the refrigerant is prevented from leaking.

Optionally, the first end of the first inlet/outlet pipe 101 and the first end of the third inlet/outlet pipe 103 are close to the lower portion of the liquid storage/gas collection tank 100. The first end of the second inlet and outlet pipe 102 is close to the upper part of the liquid storage and gas collection tank 100. Thus, the height difference between the first end of the first inlet and outlet pipe 101 and the first end of the second inlet and outlet pipe 102 is ensured, and the liquid storage amount of the liquid storage and gas collection tank 100 is increased.

Optionally, as shown in fig. 3, the heat exchanger 200 further comprises the semiconductor refrigeration device 110. The semiconductor refrigeration device 110 is disposed on an outer wall of the liquid storage and gas collection tank 100 for adjusting a temperature of a refrigerant in the liquid storage and gas collection tank 100.

In this embodiment, the semiconductor refrigeration device 110 can transmit cold or heat to the refrigerant in the liquid storage and gas collection tank 100. When the heat exchanger 200 is used as a condenser, the semiconductor refrigeration device 110 supplies cold to the refrigerant in the liquid storage and gas collection tank 100 to reduce the temperature of the refrigerant, which is equivalent to supercooling the refrigerant, thereby reducing the length of a supercooling section and reducing the cost and size of the heat exchanger 200. Also, by controlling the amount of cooling of the semiconductor refrigeration device 110, the degree of supercooling of the air conditioning system can be accurately controlled, thereby improving the cooling capacity of the air conditioner. When the heat exchanger 200 is used as an evaporator, heat is supplied to the liquid storage and gas collection tank 100 through the semiconductor refrigeration device 110, so that the temperature of the refrigerant is increased, the liquid refrigerant in the liquid storage and gas collection tank 100 is gasified, and then participates in refrigerant circulation, and the heating capacity of the air conditioner is improved.

Optionally, the semiconductor refrigeration device 110 includes refrigeration fins. The refrigerating sheet is attached to the outer wall of the liquid storage and gas collection tank 100 and used for supplying cold or heat to the refrigerant in the liquid storage and gas collection tank 100.

In this embodiment, the cooling fins operate by using a dc current, and the polarity of the dc current is changed to determine whether to perform cooling or heating on the same cooling fin. The refrigerating sheet supplies cold or heat to the refrigerant inside the liquid storage and gas collection tank 100 through the outer wall of the tank.

Optionally, the semiconductor refrigeration unit 110 further comprises a mounting seat. The mounting base is arranged on the outer wall of the liquid storage and gas collection tank 100 and used for fixing the refrigeration piece.

Optionally, the semiconductor refrigeration device 110 is disposed at the bottom of the outside of the liquid storage and gas collection tank 100. In this embodiment, the refrigeration sheet is fixed to the bottom of the liquid storage and gas collection tank 100 through the mounting base, and the refrigeration sheet supplies cold or heat to the refrigerant inside the refrigeration sheet through the bottom wall of the liquid storage and gas collection tank 100.

Optionally, two semiconductor refrigeration devices 110 are oppositely disposed on the side walls of the liquid storage and gas collection tank 100. In this embodiment, the refrigeration piece is fixed in the both sides and the highly the same of stock solution gas-collecting tank 100 through the mount pad, and the refrigeration piece of both sides supplies cold or heat to the inside refrigerant of stock solution gas-collecting tank 100 simultaneously like this, and the temperature variation of refrigerant is more even.

Optionally, a plurality of semiconductor refrigeration devices 110 are uniformly arranged on the side wall of the liquid storage and gas collection tank 100 along the axis of the liquid storage and gas collection tank 100. In this embodiment, a plurality of refrigeration pieces evenly set up along the axis of stock solution gas collecting tank 100 along the direction of height of stock solution gas collecting tank 100 promptly, like this under the higher condition of the liquid level of stock solution gas collecting tank 100, the guarantee cooling or heat supply effect.

Optionally, the heat exchanger 200 further comprises a heating device. The heating device is disposed on the outer wall of the liquid storage and gas collection tank 100 for heating the refrigerant in the liquid storage and gas collection tank 100.

In this embodiment, heat can be transferred to the refrigerant in the liquid storage and gas collection tank 100 by the heating device. When the heat exchanger 200 is used as an evaporator, heat is supplied to the liquid storage and gas collection tank 100 by a heating device to increase the temperature of the refrigerant, so that the liquid refrigerant in the liquid storage and gas collection tank 100 is gasified to participate in refrigerant circulation, thereby improving the heating capacity of the air conditioner.

Alternatively, as shown in fig. 4, the heating means includes a heating coil 120. The heating coil 120 is disposed around the side of the liquid storage and gas collection tank 100. When the heating coil 120 is powered on, it generates heat, and then supplies heat to the refrigerant inside the liquid storage and gas collection tank 100 through the side wall thereof.

Optionally, the heating coil 120 is located at the middle-lower part of the side of the liquid storage gas collection tank 100. The liquid refrigerant stored in the liquid storage and gas collection tank 100 is mainly located at the middle lower part, and the heating coil 120 is arranged at a position convenient for heating the refrigerant.

Optionally, the power of the heating coil 120 may be adjusted. In this embodiment, the power of the heating coil 120 is adjusted to adjust the vaporization rate of the refrigerant in the liquid storage and gas collection tank 100, so as to adjust the amount of the refrigerant participating in the circulation. For example, the power of the heating coil 120 is set to three, and the heating capacity of the air conditioner is improved by increasing the power of the heating coil 120 and further increasing the refrigerant flow rate by increasing the shift position of the heating coil 120 as the outside temperature decreases.

Optionally, the heat exchanger 200 further comprises a plurality of fins 130. The plurality of fins 130 surround the side surface of the liquid storage and gas collection tank 100 and are uniformly arranged along the axis of the liquid storage and gas collection tank 100; the heating coil 120 is disposed between adjacent fins 130.

In this embodiment, the heat exchange capability of the liquid storage and gas collection tank 100 is improved by arranging the fins 130, so as to facilitate the improvement of the dryness of the refrigerant at the inlet of the evaporator when the heat exchanger 200 is used as a condenser. The heating coil 120 is arranged to supply heat to the refrigerant in the liquid storage and gas collection tank 100, so as to improve the flow rate of the refrigerant when the heat exchanger 200 is used as an evaporator.

Alternatively, the number of turns of the heating coil 120 between the adjacent fins 130 is the same. Thus, heat can be supplied to the refrigerant in the liquid storage and gas collection tank 100 more uniformly.

Optionally, the heat exchanger 200 further comprises a phase change thermal storage device. The phase change heat storage device is disposed on the outer wall of the liquid storage gas collecting tank 100, and is configured to absorb heat of the refrigerant in the liquid storage gas collecting tank 100 through phase change.

In this embodiment, when the heat exchanger 200 is used as a condenser, the phase change heat storage device absorbs heat of the refrigerant in the liquid storage and gas collection tank 100 to reduce the temperature of the refrigerant, which is equivalently used for supercooling the refrigerant, thereby reducing the length of a supercooling section and reducing the cost and size of the heat exchanger 200.

Alternatively, as shown in fig. 5, the phase change heat storage device includes a phase change heat storage material 140. The phase-change heat storage material 140 is wrapped on the outer wall of the liquid storage gas collecting tank 100, and the phase-change heat storage material 140 absorbs the heat of the refrigerant inside the liquid storage gas collecting tank 100 through the outer wall of the liquid storage gas collecting tank and stores the heat through phase change.

Optionally, the phase change thermal storage material 140 wraps the sides and bottom of the liquid and gas storage tanks 100. Thus, the heat of the refrigerant inside the liquid storage and gas collection tank 100 can be absorbed conveniently.

Optionally, the phase change thermal storage material 140 wraps the middle and lower portions of the side surfaces of the liquid storage and gas collection tank 100. The liquid refrigerant stored in the liquid storage and gas collection tank 100 is mainly located at the middle lower part, and the phase change heat storage material 140 is arranged at a position convenient for absorbing the heat of the refrigerant.

Optionally, the thickness of the phase change heat storage material 140 wrapped on the side surface of the liquid storage gas collecting tank 100 is greater than the thickness of the phase change heat storage material 140 wrapped on the bottom surface of the liquid storage gas collecting tank 100. The liquid and gas storage tank 100 is cylindrical, and the area of the side surface is larger than that of the bottom surface. Therefore, the thickness of the phase change heat storage material 140 wrapped on the side surface of the liquid storage gas collecting tank 100 is larger, which is beneficial to absorbing the heat of the refrigerant in the liquid storage gas collecting tank 100.

Optionally, the phase change temperature of the phase change heat storage material 140 is 20 ℃ to 30 ℃. When the heat exchanger 200 is used as a condenser, the temperature of the refrigerant flowing through the liquid storage and gas collection tank 100 is 35-40 ℃. At this time, the temperature of the refrigerant is higher than the phase change temperature of the phase change heat storage material 140, and the heat of the refrigerant is transferred to the phase change heat storage material 140 to cause phase change, thereby reducing the temperature of the refrigerant.

Optionally, the liquid storage and gas collection tank 100 further comprises a heat exchange device. The heat exchange device is disposed on the outer wall of the liquid storage and gas collection tank 100, so that heat exchange is performed by the refrigerant inside the liquid storage and gas collection tank 100.

In this embodiment, when the heat exchanger 200 is used as a condenser, the refrigerant in the liquid storage and gas collection tank 100 exchanges heat with the external environment through the heat exchange device, so that the temperature of the refrigerant is reduced, which is equivalent to supercooling the refrigerant, thereby reducing the length of a supercooling section and reducing the cost and size of the heat exchanger 200. And, the refrigerant quality of the evaporator inlet is improved.

Optionally, as shown in fig. 6, the heat exchange means comprises fins 130. The fins 130 are arranged around the side of the tank body of the liquid storage and gas collection tank 100. Thus being beneficial to the heat exchange between the refrigerant in the liquid storage and gas collection tank 100 and the external environment.

Optionally, a plurality of fins 130 are arranged along the axis of the liquid storage and gas collection canister 100. In this embodiment, a plurality of fins 130 set up along the axis of stock solution gas-collecting tank 100 along the direction of height of stock solution gas-collecting tank 100 promptly, like this under the higher condition of liquid level of stock solution gas-collecting tank 100, the guarantee heat transfer effect.

Optionally, the spacing of adjacent fins 130 is the same. Thus, the refrigerant in the liquid storage and gas collection tank 100 can exchange heat with the external environment more uniformly.

Optionally, the fins 130 are integrally formed with the liquid storage vapor collection canister 100. This simplifies the connection between the fins 130 and the liquid and gas storage tanks 100.

Optionally, the fins 130 are made of aluminum, copper, or an aluminum alloy. The heat conductivity of aluminum, copper or aluminum alloy is excellent, and heat exchange between the refrigerant in the liquid storage and gas collection tank 100 and the external environment is facilitated.

Optionally, a temperature sensor is arranged in the liquid storage and gas collection tank 100 to detect the temperature of the refrigerant in the liquid storage and gas collection tank 100. Therefore, the temperature of the refrigerant in the liquid storage and gas collection tank 100 can be monitored in real time through the temperature sensor.

Optionally, a pressure sensor is disposed in the liquid storage and gas collection tank 100 for detecting the pressure of the refrigerant in the liquid storage and gas collection tank 100. Therefore, the pressure of the refrigerant in the liquid storage and gas collection tank 100 can be monitored in real time through the pressure sensor.

The embodiment of the present disclosure further provides an air conditioner, which includes the heat exchanger 200 described in any of the above embodiments.

Alternatively, the heat exchanger 200 serves as an outdoor unit of an air conditioner. In this embodiment, when the air conditioner operates in a cooling mode, that is, the heat exchanger 200 serves as a condenser, the refrigerant flows into the liquid storage and gas collection tank 100 through the first inlet and outlet pipe 101 and the third inlet and outlet pipe 103, and flows out of the liquid storage and gas collection tank 100 through the second inlet and outlet pipe 102. Because a height difference exists between the first end of the first inlet and outlet pipe 101 and the first end of the second inlet and outlet pipe 102, the volume of the liquid and gas storage tank 100 corresponding to the height difference can store the refrigerant, thereby reducing the refrigerant flow. When the air conditioner operates in a heating mode, namely the heat exchanger 200 serves as an evaporator, refrigerant flows into the liquid storage and gas collection tank 100 from the second inlet and outlet pipe 102, and flows out of the liquid storage and gas collection tank 100 from the first inlet and outlet pipe 101 and the third inlet and outlet pipe 103. At this time, the liquid storage and gas collection tank 100 has less refrigerant, and most of the refrigerant is discharged through the first inlet/outlet pipe 101 and the third inlet/outlet pipe 103, thereby increasing the refrigerant flow rate of the refrigerant circulation loop. Therefore, the air conditioner automatically adjusts the refrigerant flow of the refrigerant circulation loop through the liquid storage and gas collection tank 100 in a refrigeration mode or a heating mode, and the energy efficiency of the air conditioner is effectively improved.

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 exchange pipeline comprises a condensation section;

the liquid storage and gas collection tank (100) is arranged at the condensation section and is provided with a first inlet and outlet pipe (101), a second inlet and outlet pipe (102) and a third inlet and outlet pipe (103); the first ends of the first inlet and outlet pipe (101) and the third inlet and outlet pipe (103) are communicated with the liquid storage and gas collection tank (100), the second ends of the first inlet and outlet pipe (101) and the third inlet and outlet pipe (103) are communicated with a part of the condensation section, and the first inlet and outlet pipe (101) and the third inlet and outlet pipe (103) are in parallel connection; a first end of the second inlet and outlet pipe (102) is communicated with the liquid storage and gas collection tank (100), and a second end of the second inlet and outlet pipe is communicated with the other part of the condensation section;

and the distance from the first end of the first inlet and outlet pipe (101) to the bottom of the liquid storage and air collection tank (100) is equal to the distance from the first end of the third inlet and outlet pipe (103) to the bottom of the liquid storage and air collection tank (100), and the distance from the first end of the first inlet and outlet pipe (101) to the bottom of the liquid storage and air collection tank (100) is smaller than the distance from the first end of the second inlet and outlet pipe (102) to the bottom of the liquid storage and air collection tank (100).

2. The heat exchanger of claim 1,

the first inlet and outlet pipe (101), the second inlet and outlet pipe (102) and the third inlet and outlet pipe (103) are vertically arranged, the first inlet and outlet pipe (101) and the third inlet and outlet pipe (103) are located on one side of the liquid storage and gas collection tank (100), and the second inlet and outlet pipe (102) is located on the other side of the liquid storage and gas collection tank (100).

3. The heat exchanger of claim 1,

the first inlet and outlet pipe (101), the second inlet and outlet pipe (102) and the third inlet and outlet pipe (103) are all vertically arranged, and the second inlet and outlet pipe (102) is located between the first inlet and outlet pipe (101) and the second inlet and outlet pipe (102).

4. The heat exchanger according to any one of claims 1 to 3,

the liquid storage and gas collection tank (100) comprises a top cover;

the first inlet and outlet pipe (101), the second inlet and outlet pipe (102) and the third inlet and outlet pipe (103) extend into the liquid storage and gas collection tank (100) from the top cover.

5. The heat exchanger according to any one of claims 1 to 3,

the first end of the first inlet and outlet pipe (101) and the first end of the third inlet and outlet pipe (103) are close to the lower part of the liquid storage and gas collection tank (100).

6. The heat exchanger according to any one of claims 1 to 3,

the first end of the second inlet and outlet pipe (102) is close to the upper part of the liquid storage and gas collection tank (100).

7. An air conditioner characterized by comprising the heat exchanger according to any one of claims 1 to 6.

8. The air conditioner according to claim 7,

the heat exchanger (200) is used as an outdoor unit of the air conditioner.

9. The air conditioner according to claim 8,

when the air conditioner operates in a refrigeration mode, refrigerant flows into the liquid storage and gas collection tank (100) from the first inlet and outlet pipe (101) and the third inlet and outlet pipe (103), and flows out of the liquid storage and gas collection tank (100) from the second inlet and outlet pipe (102).

10. The air conditioner according to claim 8,

when the air conditioner operates in a heating mode, refrigerant flows into the liquid storage and gas collection tank (100) from the second inlet and outlet pipe (102), and flows out of the liquid storage and gas collection tank (100) from the first inlet and outlet pipe (101) and the third inlet and outlet pipe (103).

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