CN218495412U - Heat exchange device and air conditioner - Google Patents

Abstract

The application relates to the technical field of household appliances and discloses a heat exchange device. This heat transfer device is provided with first refrigerant access & exit and second refrigerant access & exit, and heat transfer device includes: the first end of each refrigerant passage is communicated with the first refrigerant inlet and outlet, and each refrigerant passage is provided with a gas-liquid two-phase passage with the refrigerant in a gas-liquid two-phase state; the first end of the supercooling section passage is communicated with the second end of each refrigerant passage, and the second end of the supercooling section passage is communicated with the second refrigerant inlet and outlet; and the first liquid storage tank is connected in series with the gas-liquid two-phase passage and is used for storing the refrigerant when the heat exchange device is used as a condenser and the air conditioner is in a low load state. The circulating refrigerant quantity in the heat exchange device is matched with the optimal refrigerant quantity required by the current working condition, so that the compressor keeps moderate running frequency, and the energy efficiency of the air conditioner is improved. The application also discloses an air conditioner.

Description

Heat exchange device and air conditioner

Technical Field

The application relates to the technical field of household appliances, for example to a heat exchange device and an air conditioner.

Background

The heat exchange device is an important component of the air conditioner, a refrigerant circulation pipeline is arranged in the heat exchange device, and the heat exchange device realizes the transmission of heat between an indoor environment and an outdoor environment through the circulation flow of a refrigerant in the refrigerant circulation pipeline.

In the related art, the amount of the circulating refrigerant in the refrigerant circulating pipeline is the optimal amount of the circulating refrigerant required under the rated working condition of the air conditioner, and the amount of the circulating refrigerant is a fixed value.

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 optimum amount of circulating refrigerant varies with the variation of the air conditioner load, and the smaller the air conditioner load, the smaller the required optimum amount of circulating refrigerant. In the air conditioner provided by the related technology, when the heat exchange device is used as a condenser and the air conditioner is in a low-load working condition, the required optimal refrigerant quantity is smaller than the circulating refrigerant quantity in the refrigerant circulating pipeline. The larger amount of the circulating refrigerant can keep the compressor at a higher operation frequency, thereby causing the energy efficiency loss of the air conditioner, which is contrary to the design concept of energy saving and consumption reduction.

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 exchange device and an air conditioner, wherein under the working condition that the heat exchange device is used as a condenser and the air conditioner is in a low load state, a certain amount of refrigerant is stored by using a first liquid storage tank, so that the circulating refrigerant amount in the heat exchange device is matched with the optimal refrigerant amount required by the current working condition, the compressor keeps a relatively moderate operation frequency, and the energy efficiency of the air conditioner is improved.

In some embodiments, the heat exchange device is provided with a first refrigerant inlet and a second refrigerant inlet, and the heat exchange device includes: one or more refrigerant passages, wherein a first end of each refrigerant passage is communicated with the first refrigerant inlet and outlet, and each refrigerant passage is provided with a gas-liquid two-phase passage with a refrigerant in a gas-liquid two-phase state; a first end of each supercooling section passage is communicated with a second end of each refrigerant passage, and the second end of each supercooling section passage is communicated with the second refrigerant inlet and outlet; and the first liquid storage tank is connected in series to the gas-liquid two-phase section passage and is used for storing the refrigerant under the condition that the heat exchange device is used as a condenser and the air conditioner is under a low load.

Optionally, the first fluid reservoir comprises: the first opening is arranged at the lower part of the first liquid storage tank; the second opening is arranged at the upper part of the first liquid storage tank; the first liquid storage tank is connected in series to the gas-liquid two-phase section passage through the first opening and the second opening; under the condition that the heat exchange device is used as a condenser, a refrigerant flows into the first liquid storage tank from the first opening and flows out of the first liquid storage tank from the second opening.

Optionally, the first liquid storage tank further comprises: a third opening provided at a lower portion of the second opening; wherein the third opening is communicated with the supercooling section passage.

Optionally, the third opening is communicated with the supercooling section passage through a first communicating pipe, and the first communicating pipe is provided with a control valve.

Optionally, the heat exchange device further comprises: the second liquid storage tank is connected in series with the supercooling section passage; the second liquid storage tank is also communicated with the third opening so as to directly introduce the refrigerant in the first liquid storage tank into the second liquid storage tank.

Optionally, the heat exchange device further comprises: a first splitter element comprising a first ingress interface and a plurality of first egress interfaces; the first inflow interface is communicated with the first refrigerant inlet and outlet, and the plurality of first outflow interfaces are respectively communicated with the first ends of the plurality of refrigerant channels.

Optionally, the heat exchange device further comprises: a second shunt element comprising a plurality of second ingress interfaces and a second egress interface; the plurality of second inflow interfaces are respectively communicated with the second ends of the plurality of refrigerant passages, and the second outflow interfaces are communicated with the first ends of the supercooling section passages.

Optionally, the second flow dividing element is communicated with the first end of the supercooling section passage through a second communicating pipe, and the third opening is communicated with the second communicating pipe or the second liquid storage tank.

Optionally, the first liquid storage tank is connected in series with the gas-liquid two-phase passage of one or M refrigerant passages; the heat exchange device comprises N refrigerant passages, N is an integer and is more than or equal to 2; m is more than or equal to 2 and less than or equal to N.

In some embodiments, the air conditioner comprises the heat exchange device.

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

when the heat exchange device provided by the embodiment of the disclosure is used as a condenser, a refrigerant flows into the heat exchange device from the first refrigerant inlet and outlet, sequentially flows through the refrigerant passage and the supercooling section passage, and then flows out of the heat exchange device through the second refrigerant inlet and outlet. The heat exchange device is also provided with a first liquid storage tank, and the first liquid storage tank is connected in series with a gas-liquid two-phase passage in the refrigerant passage. Under the condition that the heat exchange device is used as a condenser and the air conditioner is in a low load state, the heat exchange coefficient of the condenser is larger, more liquid refrigerants are contained in the gas-liquid two-phase passage, and the refrigerants can enter the first liquid storage tank and can be stored in a certain amount by the first liquid storage tank. Therefore, when the heat exchange device provided by the embodiment of the disclosure is used as a condenser and the air conditioner is in a low-load working condition, the amount of circulating refrigerants in the refrigerant passage and the supercooling section passage is reduced. The circulating refrigerant quantity is matched with the optimal refrigerant quantity required by the current working condition, so that the operating frequency of the compressor is in a proper range, and the energy efficiency loss of the air conditioner 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 structural diagram of a heat exchange device provided in an embodiment of the present disclosure;

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

FIG. 3 is a schematic structural diagram of another heat exchange device provided by the embodiment of the disclosure;

fig. 4 is a schematic diagram of a refrigerant flow path of a heat exchanger as a condenser according to an embodiment of the disclosure;

fig. 5 is a schematic view of a refrigerant flow path of an evaporator of a heat exchanger according to an embodiment of the disclosure.

Reference numerals:

01. a first refrigerant inlet and outlet; 02. a second refrigerant inlet and outlet; 1. a refrigerant passage; 12. a gas-liquid two-phase segment passage; 2. a supercooling section passage; 21. a fourth heat exchange path; 3. a first liquid storage tank; 31. a first opening; 32. a second opening; 33. a third opening; 4. a second liquid storage tank; 5. a first shunt element; 6. a second flow dividing element; 101. a first communication pipe; 102. a control valve; 103. and a second communication pipe.

Detailed Description

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

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

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

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

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

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

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

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

An air conditioner is a device which utilizes manual means to adjust and control parameters such as temperature, humidity, cleanliness, flow velocity and the like of air in an indoor environment. The air conditioner may operate in a cooling mode or a heating mode to maintain the temperature in the indoor space within a set range. The heat exchanger is an important component of the air conditioner, a refrigerant circulating pipeline is arranged in the heat exchanger, and heat is transferred between the indoor environment and the outdoor environment through the circulating flow of the refrigerant in the refrigerant circulating pipeline.

In the related art, the refrigerant quantity filled in the refrigerant circulation pipeline is the optimal refrigerant quantity required under the rated working condition of the air conditioner, and the refrigerant circulation quantity in the refrigerant circulation pipeline is a fixed value. However, the optimum circulation refrigerant amount varies with the air conditioner load, and the smaller the air conditioner load, the smaller the required optimum circulation refrigerant amount. The amount of the circulating refrigerant in the air conditioner provided in the related art is a constant value, and the air conditioner does not have the adjusting capacity suitable for the load of the air conditioner. For example, under the condition that the heat exchange device is used as a condenser and the air conditioner is in a low load condition, the required optimal refrigerant quantity is smaller than the circulating refrigerant quantity in the refrigerant circulating pipeline. The larger circulating refrigerant amount can keep the higher operation frequency of the compressor, thereby causing the energy efficiency loss of the air conditioner, which is contrary to the design concept of energy saving and consumption reduction.

Therefore, the embodiment of the disclosure provides a heat exchange device and an air conditioner, when the heat exchange device is used as a condenser and the air conditioner is in a low-load working condition, the first liquid storage tank is used for storing part of refrigerant, so that the circulating refrigerant quantity in the heat exchange device is matched with the optimal refrigerant quantity required by the current working condition, the compressor is kept at a moderate operation frequency, and the energy efficiency of the air conditioner is improved.

In one aspect, an embodiment of the present disclosure provides a heat exchange device.

In some embodiments, referring to fig. 1, the heat exchange device is provided with a first refrigerant inlet 01 and a second refrigerant inlet 02. The heat exchange device comprises one or more refrigerant passages 1, a supercooling section passage 2 and a first liquid storage tank 3.

The first end of each refrigerant passage 1 is communicated with the first refrigerant inlet/outlet 01, each refrigerant passage 1 is provided with a gas-liquid two-phase passage 12, and the refrigerant in the gas-liquid two-phase passage 12 is in a gas-liquid two-phase state. The first end of the supercooling section passage 2 is communicated with the second end of each refrigerant passage 1, and the second end of the supercooling section passage 2 is communicated with the second refrigerant inlet and outlet 02. The first liquid storage tank 3 is connected in series to the gas-liquid two-phase passage 12, and the first liquid storage tank 3 is used for storing a refrigerant under the condition that the heat exchange device is used as a condenser and the air conditioner is under a low load.

When the heat exchange device provided by the embodiment of the disclosure is used as a condenser, a refrigerant flows into the heat exchange device from the first refrigerant inlet/outlet 01, sequentially flows through the refrigerant passage 1 and the supercooling section passage 2, and then flows out of the heat exchange device through the second refrigerant inlet/outlet 02. The heat exchange device is also provided with a first liquid storage tank 3, and the first liquid storage tank 3 is connected in series with a gas-liquid two-phase passage 12 in the refrigerant passage 1. Under the condition that the heat exchange device is used as a condenser and the air conditioner is in a low load state, the heat exchange coefficient of the condenser is larger, more liquid refrigerants are contained in the gas-liquid two-phase section passage, and the refrigerants can enter the first liquid storage tank 3 and can be stored in a certain amount by utilizing the first liquid storage tank 3. Therefore, when the heat exchange device provided by the embodiment of the disclosure is used as a condenser and the air conditioner is in a low-load working condition, the amount of the circulating refrigerant in the refrigerant passage 1 and the supercooling section passage 2 is reduced. The circulating refrigerant quantity is matched with the optimal refrigerant quantity of the current working condition, so that the running frequency of the compressor is in a proper range, and the energy efficiency loss of the air conditioner is reduced.

Here, the division of the gas-liquid two-phase passage 12 will be described by taking a heat exchanger as an example of a condenser:

the compressor discharges superheated gaseous refrigerant, and the superheated gaseous refrigerant enters the condenser from the first refrigerant inlet/outlet 01, and releases heat in the condenser. As the refrigerant flows and heat is radiated, the state of the refrigerant in the refrigerant passage 1 changes to: superheated gas → saturated gas → gas-liquid two-phase → saturated liquid. The gas-liquid two-phase section passage 12 is: the state of the refrigerant in the refrigerant passage 1 is a gas-liquid two-phase pipe section. Further, the state of the refrigerant in the supercooling section passage 2 is a supercooled state.

In the case where the heat exchanger includes a plurality of refrigerant passages 1, the plurality of refrigerant passages 1 are connected in parallel with each other, and form a first parallel point and a second parallel point. In the case where the heat exchanger is used as a condenser, the refrigerant flows from the first parallel point to the second parallel point.

It is understood that, in the case where the heat exchanging apparatus includes a plurality of refrigerant passages 1, each refrigerant passage 1 includes a gas-liquid two-phase passage 12.

Alternatively, referring to FIG. 2, the first reservoir 3 includes a first opening 31 and a second opening 32.

Wherein, the first opening 31 is arranged at the lower part of the first liquid storage tank 3. The second opening 32 is provided at an upper portion of the first reservoir 3. The first reservoir 3 is connected in series to the gas-liquid two-phase section passage 12 through the first opening 31 and the second opening 32. When the heat exchanger is used as a condenser, the refrigerant flows into the first receiver 3 through the first opening 31 and flows out of the first receiver 3 through the second opening 32.

Since the first receiver 3 is disposed in the gas-liquid two-phase passage 12, the refrigerant entering the first receiver 3 includes a gaseous refrigerant and a liquid refrigerant. Under the action of gravity, the liquid refrigerant is more prone to gather at the lower part of the first liquid storage tank 3; the gaseous refrigerant tends to collect in the upper portion of the first receiver 3 and exit the first receiver through the second upper opening 32. With the arrangement, under the condition that the heat exchange device is used as a condenser, a certain amount of refrigerant can be stored in the first liquid storage tank 3.

It can be understood that, when the heat exchanger is used as a condenser and the air conditioner is under a low load, the heat exchange coefficient of the condenser is relatively large, and the gas-liquid two-phase passage 12 contains more liquid-state refrigerant. The first liquid storage tank 3 can be used for storing more liquid refrigerants, so that the quantity of circulating refrigerants in the refrigerant passage 1 and the supercooling section passage 2 is reduced, the quantity of the circulating refrigerants is matched with the optimal quantity of the refrigerants under the low-load working condition, the running frequency of the compressor can be in a proper range, and the energy efficiency loss of the air conditioner is reduced. When the heat exchanger is used as a condenser and the air conditioner is under a high load, the heat exchange coefficient of the condenser is small, and the gas-liquid two-phase passage 12 contains more gaseous refrigerants. At this time, the refrigerant stored in the first reservoir 3 is mainly a gaseous refrigerant, and since the density of the gaseous refrigerant is low, the amount of the refrigerant contained in the first reservoir 3 is small, the amount of the circulating refrigerant in the refrigerant passage 1 is almost unchanged, and the heat exchange amount of the heat exchange device can be ensured. In the case that the heat exchanger is an evaporator, the refrigerant enters the first receiver 3 from the second opening 32 and flows out of the first receiver 3 from the first opening 31. Since the first opening 31 is located at the lower portion of the first receiver 3, the liquid refrigerant is preferentially discharged from the first receiver 3 through the first opening 31. Therefore, the first liquid storage tank 3 does not affect the normal operation of the evaporator when the air conditioner is in the heating mode. The first liquid storage tank 3 is arranged on the gas-liquid two-phase passage 12, so that the self-adaptive adjustment of the quantity of the circulating refrigerant under different loads can be realized, and the effects of energy conservation and consumption reduction are achieved.

Optionally, referring to FIG. 2, the first reservoir 3 further includes a third opening 33. The third opening 33 is provided at a lower portion of the second opening 32, and the third opening 33 communicates with the supercooling section passage 2.

By providing the third opening 33 communicated with the supercooling section passage 2, when the liquid refrigerant stored in the first receiver 3 reaches a certain height, the liquid refrigerant may flow into the supercooling section passage 2 through the third opening 33. By the arrangement, part of the liquid refrigerant can be separated from the gas-liquid two-phase passage 12, and the reduction of the effective heat exchange area caused by the excessive liquid refrigerant in the gas-liquid two-phase passage 12 is avoided, so that the heat exchange capacity of the heat exchange device is improved.

Alternatively, referring to fig. 2, the third opening 33 communicates with the supercooling section passage 2 through a first communication pipe 101, and the first communication pipe 101 is provided with a control valve 102.

By such arrangement, the amount of the liquid refrigerant entering the supercooling section passage 2 from the third opening 33 can be controlled by adjusting the opening degree of the control valve 102, so that the regulation and control of the heat exchange device are more accurate.

Optionally, referring to fig. 3, the heat exchange device further comprises a second liquid storage tank 4. The second liquid storage tank 4 is connected in series with the supercooling section passage 2. The second tank 4 is also connected to the third opening 33, so that the refrigerant in the first tank 3 can be directly introduced into the second tank 4.

By the arrangement, the second liquid storage tank 4 can be used for storing partial refrigerant, and the regulation and control capacity of the heat exchange device on the quantity of the circulating refrigerant is improved. Meanwhile, part of liquid refrigerants can be separated from the refrigerant passage 1, the reduction of the effective heat exchange area caused by the fact that the liquid refrigerants in the refrigerant passage 1 are too much is avoided, and the heat exchange capacity of the heat exchange device is enhanced. In addition, the length of the supercooling section passage 2 can be increased by arranging the second liquid storage tank 4, and the supercooling degree of the refrigerant is improved.

Optionally, referring to fig. 3, the heat exchange device further comprises a first flow dividing element 5. The first flow dividing element 5 comprises one first inflow interface and a plurality of first outflow interfaces. The first inflow ports communicate with the first refrigerant inlet/outlet 01, and the plurality of first outflow ports communicate with first ends of the plurality of refrigerant passages 1, respectively.

By arranging the first flow dividing element 5, the amount of the refrigerant entering each refrigerant passage 1 can be controlled, so that the refrigerant flowing from the first refrigerant inlet/outlet 01 flows into each refrigerant passage 1 in a preset manner, and the heat exchange effect of the heat exchange device is ensured.

Wherein the first ingress interface is the first parallel point.

Optionally, referring to fig. 3, the heat exchange device further comprises a second flow dividing element 6. The second flow dividing element 6 comprises a plurality of second inflow interfaces and a second outflow interface. The plurality of second inflow interfaces are respectively communicated with the second ends of the plurality of refrigerant passages 1, and the second outflow interfaces are communicated with the first ends of the supercooling section passages 2.

By providing the second flow dividing element 6, the refrigerants flowing out of the plurality of refrigerant passages 1 can be mixed when the heat exchanger is used as a condenser. In addition, under the condition that the heat exchange device is used as an evaporator, the amount of the refrigerant entering each refrigerant passage 1 can be controlled, so that the refrigerant flowing from the second refrigerant inlet/outlet 02 flows into each refrigerant passage 1 in a preset mode, and the heat exchange effect of the heat exchange device is ensured.

Wherein the second outflow interface is the second parallel point.

Alternatively, referring to fig. 3, the second dividing element 6 is communicated with the first end of the supercooled section passage 2 through a second communication pipe 103, and the third opening 33 is communicated with the second communication pipe 103 or the second receiver tank 4.

By the arrangement, the second liquid storage tank 4 can be used for storing partial refrigerant, and the regulation and control capacity of the heat exchange device on the quantity of the circulating refrigerant is improved. In addition, the length of the supercooling section can be increased, and the heat exchange capacity of the heat exchange device is improved.

Optionally, with reference to fig. 1, fig. 2 and fig. 3, the first receiver 3 is connected in series to one or M gas-liquid two-phase section passages 12 of the refrigerant passage 1. The heat exchange device comprises N refrigerant passages 1,N which are integers, wherein N is more than or equal to 2; m is more than or equal to 2 and less than or equal to N.

By the arrangement, the quantity of the circulating refrigerant in one or M refrigerant passages 1 can be flexibly regulated and controlled according to requirements.

For example, the heat exchanger includes three refrigerant passages 1, which are a first refrigerant passage, a second refrigerant passage and a third refrigerant passage from top to bottom. Referring to fig. 1, the first receiver 3 is connected in series to the gas-liquid two-phase passage 12 of the second refrigerant passage, so as to regulate the amount of the circulating refrigerant in the second refrigerant passage. Referring to fig. 2, the first receiver 3 is connected in series to the gas-liquid two-phase passage 12 of the first refrigerant passage and the gas-liquid two-phase passage 12 of the third refrigerant passage, respectively. The regulation and control of the quantity of the circulating refrigerants in the first refrigerant passage and the third refrigerant passage are realized, and the regulation and control range is enlarged by the arrangement. Referring to fig. 3, the first receiver 3 is connected in series to the gas-liquid two-phase passage 12 of the first refrigerant passage, the gas-liquid two-phase passage 12 of the second refrigerant passage, and the gas-liquid two-phase passage 12 of the third refrigerant passage, respectively. Therefore, the regulation and control of the quantity of the circulating refrigerants in the first refrigerant passage, the second refrigerant passage and the third refrigerant passage are realized. By the arrangement, the regulation range is expanded, and the regulation and control of the quantity of the circulating refrigerants in each refrigerant passage are more uniform.

The following explains the refrigerant flow direction when the heat exchanger is used as a condenser, taking the first receiver 3 connected in series to the first refrigerant passage, the second refrigerant passage, and the third refrigerant passage, respectively as an example: referring to fig. 4, the refrigerant enters the first flow dividing element 5 from the first refrigerant inlet/outlet 01, and then is divided by the first flow dividing element 5 into the first refrigerant passage, the second refrigerant passage, and the third refrigerant passage. The refrigerant entering the first refrigerant passage enters the first receiver 3 through the first opening 31, then flows out of the first receiver 3 through the second opening 32 and flows into the first refrigerant passage again, and enters the second flow dividing element 6 after continuously exchanging heat through the first refrigerant passage. The refrigerant entering the second refrigerant passage enters the first receiver 3 through the first opening 31, then flows out of the first receiver 3 through the second opening 32 and flows into the second refrigerant passage again, and enters the second flow dividing element 6 after continuously exchanging heat through the second refrigerant passage. The refrigerant entering the third refrigerant passage enters the first receiver 3 through the first opening 31, then flows out of the first receiver 3 through the second opening 32 and flows into the third refrigerant passage again, and enters the second flow dividing element 6 after continuously exchanging heat through the third refrigerant passage. The refrigerant is converged at the second flow dividing element 6, and then flows out of the condenser through the cold leg passage 2 and the second refrigerant inlet and outlet 02.

The refrigerant flow direction when the heat exchanger is used as an evaporator will be described below by taking the first receiver 3 connected in series to the first refrigerant passage as an example: referring to fig. 5, the refrigerant enters the evaporator through the second refrigerant inlet/outlet 02, passes through the cold stage passage 2, enters the second flow dividing element 6, and then is divided by the second flow dividing element 6 to enter the first refrigerant passage, the second refrigerant passage, and the third refrigerant passage. The refrigerant entering the first refrigerant passage enters the first accumulator 3 through the second opening 32, then flows out of the first accumulator 3 through the first opening 31, flows into the first refrigerant passage again, and enters the first flow dividing element 5 after continuously exchanging heat through the first refrigerant passage. The refrigerant exchanging heat through the second refrigerant passage and the third refrigerant passage directly enters the first flow dividing element 5. The refrigerant is converged at the first flow dividing member 5 and then flows out of the condenser through the first refrigerant inlet/outlet 01.

In another aspect, an embodiment of the present disclosure provides an air conditioner.

The air conditioner comprises the heat exchange device of the aspect.

The air conditioner provided by the embodiment of the disclosure is under the working condition of low load, the circulating refrigerant quantity is matched with the optimal refrigerant quantity of the current working condition, so that the operating frequency of the compressor is in a proper range, and the energy efficiency loss of the air conditioner is reduced.

Specifically, the air conditioner comprises a refrigerant circulation pipeline, and a compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger which are arranged on the refrigerant circulation pipeline. Wherein, the outdoor heat exchanger is the heat transfer device of above-mentioned one side.

When the air conditioner is in a refrigeration mode, the outdoor heat exchanger is a condenser, and the indoor heat exchanger is an evaporator. When the air conditioner is in a heating mode, the outdoor heat exchanger is an evaporator, and the indoor heat exchanger is a condenser.

When the air conditioner is in a refrigeration mode, the compressor compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature and high-pressure gaseous refrigerant enters the outdoor heat exchanger and is condensed and released in the outdoor heat exchanger to form liquid refrigerant. The liquid refrigerant is throttled by the throttling device, then the temperature of the liquid refrigerant is reduced, and the liquid refrigerant enters the indoor heat exchanger. Since the temperature of the refrigerant in the indoor heat exchanger is lower than the temperature of the indoor environment, the refrigerant in the indoor heat exchanger absorbs heat from the indoor environment, so that the temperature of the indoor environment is reduced.

When the air conditioner is in a heating mode, the compressor compresses the gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The high-temperature high-pressure gaseous refrigerant enters the indoor heat exchanger and is condensed and released in the indoor heat exchanger, so that the temperature of the indoor environment is increased. The heat-released refrigerant enters the throttling device, and the temperature is further reduced. And then into the outdoor heat exchanger to absorb heat from the outdoor environment.

Under the working condition that the air conditioner is in a refrigeration mode and is under low load, the quantity of circulating refrigerants required by the indoor heat exchanger is small, and the heat exchange coefficient of the outdoor heat exchanger is large. At the moment, the content of the liquid refrigerant in the outdoor heat exchanger is increased, the liquid refrigerant stored in the first liquid storage tank is increased, and an important adjusting function is played. Correspondingly, the quantity of circulating refrigerants in one or more refrigerant passages 1 connected with the first liquid storage tank in series is reduced and is matched with the smaller refrigerating capacity required under the working condition, so that the effects of reducing the frequency of the compressor and improving the energy efficiency are achieved.

Under the working condition that the air conditioner is in a refrigeration mode and has high load, the indoor heat exchanger needs a large amount of gaseous refrigerant, the surface heat exchange coefficient of the outdoor heat exchanger is relatively reduced at the moment, and the content of the gaseous refrigerant in the outdoor heat exchanger is larger. Since the density of the gaseous refrigerant is low and the refrigerant stored in the first receiver 3 is mainly the gaseous refrigerant, the amount of the refrigerant circulating in the refrigerant passage 1 is almost constant. The air conditioner meets the requirement that a large amount of circulating refrigerants are needed to ensure the heat exchange amount under the working condition that the air conditioner is in a refrigeration mode and has high load.

When the air conditioner is in a heating mode, the outdoor heat exchanger is an evaporator. At this time, the refrigerant enters the first accumulator 3 through the second opening 32 and is discharged from the first accumulator 3 through the first opening 31. Since the first opening 31 is close to the bottom of the first receiver 3 and the liquid refrigerant is located at the bottom of the first receiver 3, the liquid refrigerant can be preferentially discharged from the first receiver 3 through the first opening 31. Therefore, the first opening 31 does not affect the normal operation of the outdoor heat exchanger when the air conditioner is in the heating mode.

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 exchange device is characterized in that a first refrigerant inlet and outlet (01) and a second refrigerant inlet and outlet (02) are arranged, and the heat exchange device comprises:

one or more refrigerant passages (1), wherein a first end of each refrigerant passage (1) is communicated with the first refrigerant inlet/outlet (01), and each refrigerant passage (1) is provided with a gas-liquid two-phase passage (12) in which the refrigerant is in a gas-liquid two-phase state;

the first end of each supercooling section passage (2) is communicated with the second end of each refrigerant passage (1), and the second end of each supercooling section passage is communicated with the second refrigerant inlet and outlet (02); and the combination of (a) and (b),

and the first liquid storage tank (3) is connected in series to the gas-liquid two-phase section passage (12) and is used for storing the refrigerant under the condition that the heat exchange device is used as a condenser and the air conditioner is under low load.

2. A heat exchange device according to claim 1, wherein the first reservoir (3) comprises:

a first opening (31) provided at a lower portion of the first reservoir (3); and the combination of (a) and (b),

a second opening (32) arranged at the upper part of the first liquid storage tank (3);

wherein the first reservoir tank (3) is connected in series to the gas-liquid two-phase section passage (12) through the first opening (31) and the second opening (32); under the condition that the heat exchange device is used as a condenser, a refrigerant flows into the first liquid storage tank (3) from the first opening (31) and flows out of the first liquid storage tank (3) from the second opening (32).

3. A heat exchange device according to claim 2, wherein the first reservoir (3) further comprises:

a third opening (33) provided at a lower portion of the second opening (32);

wherein the third opening (33) is communicated with the supercooling section passage (2).

4. The heat exchange device of claim 3,

the third opening (33) is communicated with the supercooling section passage (2) through a first communication pipe (101), and the first communication pipe (101) is provided with a control valve (102).

5. The heat exchange device of claim 3 or 4, further comprising:

the second liquid storage tank (4) is connected in series to the supercooling section passage (2);

the second liquid storage tank (4) is also communicated with the third opening (33) so as to directly introduce the refrigerant in the first liquid storage tank (3) into the second liquid storage tank (4).

6. The heat exchange device of claim 5, further comprising:

a first splitter element (5) comprising a first incoming port and a plurality of first outgoing ports;

the first inflow interfaces are communicated with the first refrigerant inlet and outlet (01), and the plurality of first outflow interfaces are respectively communicated with the first ends of the plurality of refrigerant passages (1).

7. The heat exchange device of claim 6, further comprising:

a second shunt element (6) comprising a plurality of second inflow interfaces and a second outflow interface;

the plurality of second inflow interfaces are respectively communicated with the second ends of the plurality of refrigerant passages (1), and the second outflow interfaces are communicated with the first ends of the supercooling section passages (2).

8. The heat exchange device of claim 7,

the second flow dividing element (6) is communicated with the first end of the supercooling section passage (2) through a second communication pipe (103), and the third opening (33) is communicated with the second communication pipe (103) or the second liquid storage tank (4).

9. The heat exchange device of claim 6, 7 or 8,

the first liquid storage tank (3) is connected in series with one or M gas-liquid two-phase section passages (12) of the refrigerant passage (1);

the heat exchange device comprises N refrigerant passages (1), wherein N is an integer and is more than or equal to 2; m is more than or equal to 2 and less than or equal to N.

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

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