CN116928908A - Refrigerant adjusting heat exchanger and air conditioner - Google Patents

Abstract

The application relates to the technical field of air conditioners, and discloses a refrigerant adjusting heat exchanger, which comprises: the heat exchanger body is provided with a heat exchange branch; and the liquid storage and distribution device comprises a liquid storage shell, a first refrigerant pipe and a second refrigerant pipe, the liquid storage shell forms a liquid storage and distribution cavity, the first end of the first refrigerant pipe and the first end of the second refrigerant pipe are both communicated with the liquid storage and distribution cavity, the first refrigerant pipe is communicated with the heat exchange branch, the liquid storage and distribution device is used for partially storing refrigerant flowing out of the heat exchange branch in the liquid storage and distribution cavity, the refrigerant flows out of the second refrigerant pipe through the second refrigerant pipe, and the liquid storage and distribution device is provided with a heating element for heating the refrigerant in the liquid storage and distribution cavity. The refrigerant quantity and the refrigerant temperature involved in the refrigerant circulation are adjusted. The application also discloses an air conditioner.

Description

Refrigerant adjusting heat exchanger and air conditioner

Technical Field

The application relates to the technical field of air conditioners, in particular to a refrigerant adjusting heat exchanger and an air conditioner.

Background

The existing air conditioner product model comprises a split type structure and an integrated structure. The split type structure such as the multi-split air conditioner of the air source heat pump, including setting up indoor machine and outdoor machine in the indoor separately, wherein, indoor heat exchanger and outdoor heat exchanger of the outdoor machine are because of being used for carrying on the heat exchange with the environment of the corresponding side directly in the indoor machine, therefore it is the key apparatus of the air conditioner products, the heat exchange efficiency of the heat exchanger is high and low can influence the refrigerating, heating performance of the air conditioner directly. The outdoor environment temperature range of the air conditioner is larger, and the load variation difference of the air conditioner is larger. Under different outdoor environment temperatures and different loads, the optimal refrigerant amount required by the air conditioner is different, however, the refrigerant filling amount in the air conditioner is certain, so that the air conditioner cannot exert the optimal energy efficiency under different running loads.

In the prior art, the refrigerant participating in circulation in the air conditioner is regulated by arranging a liquid storage tank between the outdoor heat exchanger and the indoor heat exchanger, so that the air conditioner has different refrigerant circulation amounts under different operation loads.

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 mode of arranging the liquid storage tank between the outdoor heat exchanger and the indoor heat exchanger requires arranging valve body structures such as electromagnetic valves, capillaries and the like at two ends of the liquid storage tank, so that the pipeline cost and the control complexity of the air conditioner are improved.

Disclosure of Invention

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 as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a refrigerant adjusting heat exchanger and an air conditioner, which are used for solving the technical problems that a liquid storage tank is arranged between an indoor heat exchanger and an outdoor heat exchanger, valve body components such as an electromagnetic valve and a capillary tube are required to be matched, so that the refrigerant quantity of the air conditioner is adjusted to be complex and the like.

In some embodiments, a refrigerant modulating heat exchanger includes: the heat exchanger body is provided with a heat exchange branch; and the liquid storage and distribution device comprises a liquid storage shell, a first refrigerant pipe and a second refrigerant pipe, the liquid storage shell forms a liquid storage and distribution cavity, the first end of the first refrigerant pipe and the first end of the second refrigerant pipe are both communicated with the liquid storage and distribution cavity, the first refrigerant pipe is communicated with the heat exchange branch, the liquid storage and distribution device is used for partially storing refrigerant flowing out of the heat exchange branch in the liquid storage and distribution cavity, the refrigerant flows out of the second refrigerant pipe through the second refrigerant pipe, and the liquid storage and distribution device is provided with a heating element for heating the refrigerant in the liquid storage and distribution cavity.

In some embodiments, the heating element is disposed in a lower portion of the reservoir housing.

In some embodiments, the liquid storage housing includes a bottom shell, wherein the first end of the first refrigerant pipe and the first end of the second refrigerant pipe extend into the liquid storage diversion cavity, and a distance from the first end of the first refrigerant pipe to the bottom shell is smaller than a distance from the first end of the second refrigerant pipe to the bottom shell, and the heating element is disposed between the first end of the first refrigerant pipe and the bottom shell.

In some embodiments, a distance from the first end of the first refrigerant tube to the bottom shell is greater than or equal to 10 millimeters.

In some embodiments, the heating element comprises an electromagnetic heating coil.

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

In some embodiments, the air conditioner includes a refrigerant modulating heat exchanger as previously described.

In some embodiments, the air conditioner further comprises a compressor, a four-way valve, and an indoor heat exchange assembly, the refrigerant conditioning heat exchanger is an outdoor heat exchanger, the air conditioner further comprising a control portion configured to: when the air conditioner operates under a heating working condition, the heating element is controlled to be started so as to heat the refrigerant in the liquid storage and distribution cavity, so that the refrigerant in the liquid storage and distribution cavity flows out through the first refrigerant pipe, and the circulation quantity of the refrigerant participating in the heating working condition is improved.

In some embodiments, the control portion is further configured to: when the air conditioner operates under a heating working condition, the heating element is controlled to be started so as to heat the refrigerant in the liquid storage and distribution cavity, the temperature of the refrigerant flowing through the heat exchanger body is improved, and the heat exchanger body is defrosted.

In some embodiments, the indoor heat exchange assembly includes a plurality of indoor heat exchangers arranged in parallel.

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

the embodiment of the disclosure provides a refrigerant adjusting heat exchanger in which a liquid storage and flow distribution device is arranged. The liquid storage and distribution device can partially store the refrigerant flowing out of the heat exchange branch of the heat exchanger body in the liquid storage and distribution cavity, and automatically adjusts the refrigerant quantity participating in the refrigerant circulation of the air conditioner, so that the refrigerant circulation quantity of the air conditioner can accord with different operation loads, and the air conditioner has an optimal operation state under different loads.

Meanwhile, the liquid storage and distribution device is provided with a heating element, and the heating element can heat liquid refrigerants in the liquid storage and distribution cavity, so that the refrigerant quantity and the refrigerant temperature involved in refrigerant circulation are further adjusted.

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 and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

fig. 1 is a schematic structural diagram of a refrigerant conditioning heat exchanger according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a refrigerant flow path when the refrigerant modulating heat exchanger is used as an outdoor heat exchanger under refrigeration conditions according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a liquid storage and diversion device according to an embodiment of the disclosure;

FIG. 4 is a schematic view of another liquid storage and diversion device according to an embodiment of the disclosure;

FIG. 5 is a schematic view of another liquid storage and diversion device according to an embodiment of the disclosure;

FIG. 6 is a schematic cross-sectional view of a liquid storage and diverting device at a first end of a second refrigerant tube according to an embodiment of the present disclosure;

fig. 7 is a schematic structural diagram of another refrigerant conditioning heat exchanger provided in an embodiment of the present disclosure;

fig. 8 is a schematic structural view of an air conditioner according to an embodiment of the present disclosure.

Reference numerals:

1: a heat exchanger body; 2: a liquid storage and diversion device; 3: a liquid separating device; 4: a first partial heat exchange branch; 5: a second partial heat exchange branch; 6: a compressor; 7: a four-way valve;

21: a first refrigerant pipe; 211: a first end of the first refrigerant pipe; 22: a second refrigerant pipe; 221: a first end of the second refrigerant pipe; 23: a liquid storage housing; 231: a bottom case; 24: a flooded line; 25: a heating element;

81: a first indoor heat exchanger; 82: a second indoor heat exchanger;

91: a first throttling element; 92: a second throttling element; 93: a third throttling element; 94: a fourth throttling element.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. 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 still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" 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 an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may 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. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

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

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

The embodiment of the disclosure provides an air conditioner.

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

Optionally, the air conditioner provided in the embodiment of the present disclosure is an air source heat pump multi-split air conditioner, as shown in fig. 8, and the air conditioner includes a compressor 6, a four-way valve 7, an outdoor heat exchanger, a first indoor heat exchanger 81 and a second indoor heat exchanger 82. Wherein the first indoor heat exchanger 81 is in parallel communication with the second indoor heat exchanger 82. Alternatively, the first indoor heat exchanger 81 is provided at both ends thereof with a first throttling element 91 and a third throttling element 93, respectively, and the second indoor heat exchanger 82 is provided at both ends thereof with a second throttling element 92 and a fourth throttling element 94, respectively.

The embodiment of the disclosure simultaneously provides a refrigerant adjusting heat exchanger.

Optionally, the refrigerant adjusting heat exchanger may be an indoor heat exchanger or an outdoor heat exchanger in the air conditioner. The refrigerant-conditioning heat exchanger will be described in detail below as an example of an outdoor heat exchanger.

Optionally, the refrigerant adjusting heat exchanger comprises a heat exchanger body 1 and a liquid storage and distribution device 2. As shown in fig. 1 to 7. The heat exchanger body 1 is provided with a heat exchange branch. The liquid storage and distribution device 2 comprises a liquid storage shell 23, a first refrigerant pipe 21 and a second refrigerant pipe 22, wherein the liquid storage shell 23 forms a liquid storage and distribution cavity, and a first end 211 of the first refrigerant pipe and a first end 221 of the second refrigerant pipe are both communicated with the liquid storage and distribution cavity. The first refrigerant pipe 21 is connected to the heat exchange branch, and the liquid storage and distribution device 2 is configured to store part of the refrigerant flowing out of the heat exchange branch in the liquid storage and distribution cavity, and then the refrigerant flows out through the second refrigerant pipe 22.

It can be understood that the flow direction of the refrigerant is different when the air conditioner operates in different modes. For example, in the air conditioner operation cooling mode, the first refrigerant pipe 21 may be used as a refrigerant inflow pipe, and the second refrigerant pipe 22 may be used as a refrigerant outflow pipe. When the air conditioner is operated in a heating mode, the second refrigerant pipe 22 can be used as a refrigerant inflow pipe, and the first refrigerant pipe 21 can be used as a refrigerant outflow pipe.

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

Optionally, the liquid storage housing 23 includes a bottom shell 231, wherein the first end 211 of the first refrigerant pipe and the first end 221 of the second refrigerant pipe extend into the liquid storage split cavity, and a distance from the first end 211 of the first refrigerant pipe to the bottom shell 231 is smaller than a distance from the first end 221 of the second refrigerant pipe to the bottom shell 231.

When the air conditioner is in the refrigeration mode, the refrigerant of the heat exchange branch flows into the liquid storage and distribution cavity from the first refrigerant pipe 21 and flows out from the second refrigerant pipe 22, namely, the long pipe flows in and out, the liquid storage and distribution device 2 can store part of the liquid refrigerant flowing into the liquid storage and distribution cavity through the first end 211 of the first refrigerant pipe, and after reaching the full liquid line 24, the liquid refrigerant flows out of the liquid storage and distribution device 2 through the second refrigerant pipe 22. When the air conditioner is in the motion refrigeration mode, more refrigerant is stored in the liquid storage and distribution cavity, and the system refrigeration energy efficiency of the air conditioner is improved, as shown in fig. 4.

When the air conditioner operates in a heating mode, the refrigerant of the heat exchange branch flows into the liquid storage and distribution cavity from the second refrigerant pipe 22 and flows out from the first refrigerant pipe 21, namely, the short pipe flows in and out, at the moment, the refrigerant stored in the liquid storage and distribution cavity is relatively less, and most of the refrigerant flows out through the first refrigerant pipe 21 to participate in the heating cycle process of the air conditioner, so that the refrigerant quantity participating in the heating cycle is improved, and the heating capacity of the air conditioner is improved.

Optionally, the liquid storage and distribution device is provided with a heating element 25 to heat the refrigerant in the liquid storage and distribution cavity. As shown in fig. 7. Optionally, the heating element 25 comprises a heat pipe or an electromagnetic heating coil.

When the air conditioner operates in a heating mode, under the working condition that the outdoor environment temperature is low, for example, the temperature is-7 ℃ or-15 ℃, the heating element 25 arranged in the liquid storage and distribution device is controlled to be started, and a small part of refrigerant stored in the liquid storage and distribution cavity is heated, so that the part of refrigerant participates in the heating cycle, the quantity of the refrigerant participating in the heating cycle in the air conditioner is further increased, the heating capacity of the air conditioner is improved, and the indoor environment temperature of a user is improved. Optionally, the first end 211 of the first refrigerant pipe is flare-shaped, so as to collect and guide the heated refrigerant to the first refrigerant pipe 21 and participate in the heating cycle.

Optionally, the heating element 25 comprises a first gear, a second gear and a third gear, in which the heating power is sequentially increased. Controlling the heating element 25 to turn on the first gear when the outdoor ambient temperature is greater than-7 ℃ and less than or equal to 0 ℃; controlling the heating element 25 to turn on the second gear when the outdoor ambient temperature is greater than-15 ℃ and less than or equal to-7 ℃; when the outdoor ambient temperature is less than or equal to-15 ℃, the heating element 25 is controlled to be turned on for the third gear. The refrigerant stored in the liquid storage and distribution cavity can be heated rapidly and flows out through the first refrigerant pipe 21 to participate in the heating cycle of the air conditioner, so as to improve the heating capacity of the air conditioner under the low-temperature or ultra-low-temperature working condition.

Optionally, when the air conditioner is in a heating working condition, the heating element 25 is controlled to be turned on to heat the refrigerant in the liquid storage and distribution cavity, raise the temperature of the refrigerant flowing through the heat exchanger body, and defrost the heat exchanger body.

Optionally, a heating element 25 is provided at the lower portion of the reservoir housing 23. Therefore, the refrigerant at the lower part of the liquid storage and distribution cavity can be heated better, and the heating efficiency is improved. Alternatively, the heating element 25 is an electromagnetic heating coil disposed between the first end 211 of the first refrigerant tube and the bottom shell 231 and wound around the outside of the liquid storage housing 23. Therefore, the refrigerant stored in the liquid storage and distribution cavity in the heating mode can be heated better.

Optionally, the heat exchanger body 1 is provided with a plurality of heat exchange branches, the liquid storage and distribution device 2 is arranged between the plurality of heat exchange branches, the first refrigerant pipe 21 is communicated with a first part of heat exchange branches 4 in the plurality of heat exchange branches, the second refrigerant pipe 22 is communicated with a second part of heat exchange branches 5 in the plurality of heat exchange branches, and the liquid storage and distribution device 2 is used for partially storing the refrigerant flowing out of the first part of heat exchange branches 4 in the liquid storage and distribution cavity, and then the refrigerant flows into the second part of heat exchange branches 5 through the second refrigerant pipe 22. As shown in fig. 1-6.

The heat exchanger body 1 includes a plurality of heat transfer branch roads that communicate each other, and a plurality of heat transfer branch roads include first part heat transfer branch road 4 and second part heat transfer branch road 5, optionally, when the air conditioner operation refrigeration operating mode, first part heat transfer branch road 4 and second part heat transfer branch road 5 concatenate, and the flow order of refrigerant in the heat exchanger can be, first flow through first part heat transfer branch road 4, then flow through second part heat transfer branch road 5. Alternatively, in the use state of the heat exchanger, the first partial heat exchange branch 4 is arranged at the upper part of the second partial heat exchange branch 5, as shown in fig. 2. Alternatively, the second partial heat exchange branch 5 may be the supercooling section of the heat exchanger.

The liquid storage and distribution device 2 is a shell structure with a liquid storage and distribution cavity, and can partially store the refrigerant flowing from the heat exchanger. The aforementioned "liquid storage and distribution device 2 is used for partially storing the refrigerant flowing out of the first part of heat exchange branch 4 in the liquid storage and distribution cavity", where "partially storing" is understood to mean partially storing the liquid refrigerant flowing out of the first part of heat exchange branch 4. For example, the first part of the heat exchange branch 4 of the heat exchanger flows into the liquid storage and distribution cavity of the liquid storage and distribution device 2 through the first refrigerant pipe 21, at this time, the gaseous refrigerant flows into the second part of the heat exchange branch 5 through the second refrigerant pipe 22 of the liquid storage and distribution device 2, when the liquid refrigerant in the liquid storage and distribution cavity reaches above the full liquid line 24, the liquid refrigerant also flows into the second part of the heat exchange branch 5 through the second refrigerant pipe 22, and the refrigerant lower than the full liquid line 24 is stored in the liquid storage and distribution cavity and does not enter the second part of the heat exchange branch 5 of the heat exchanger, that is, does not participate in the refrigerant circulation system of the air conditioner.

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

In the air conditioner operation cooling mode, when the outdoor environment temperature is relatively low, the air conditioner can meet the temperature requirement of a user without exerting the maximum cooling capacity, such as an intermediate cooling mode or a low-temperature intermediate cooling mode of the air conditioner. According to the heat exchanger provided by the embodiment of the disclosure, the refrigerant quantity flowing through the heat exchanger can be regulated, the refrigerant quantity flowing into the refrigerant circulation system is regulated, and then the refrigerant entering the evaporator through the throttling device can fully exchange heat in the evaporator, so that the operation energy efficiency ratio of the air conditioner is improved.

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

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

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

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

Alternatively, the first refrigerant pipe 21 is linear; and/or the second refrigerant pipe 22 is linear.

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

Optionally, in the three refrigeration modes of the rated refrigeration mode, the intermediate refrigeration mode and the low-temperature intermediate refrigeration mode, part of the refrigerant flowing out of the first part of heat exchange branch is stored in the liquid storage and diversion cavity. In the rated refrigeration mode, the frequency of the compressor is high, the refrigerant flow is high, the impact force is high, and the refrigerant quantity stored in the liquid storage and distribution cavity in the rated refrigeration mode is larger than the storage quantity in the intermediate refrigeration mode and the low-temperature intermediate refrigeration mode. Therefore, the heat exchanger provided by the embodiment of the disclosure can further adjust the refrigerant storage amount in the refrigerant diversion cavity under different loads by utilizing the frequency of the compressor, the flow and the impact force of the refrigerant.

The operating parameters of the rated refrigeration mode, the intermediate refrigeration mode and the low-temperature intermediate refrigeration mode are shown in table 1 when the air conditioner operates under refrigeration conditions.

TABLE 1

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

In table 1, the outdoor heat exchanger in the air conditioner 1 is provided with the liquid storage and distribution device 2, and the heat exchanger in the air conditioner 2 is not provided with the liquid storage and distribution device 2. The first refrigerant pipe 21 of the liquid storage and distribution device 2 is linear, and the distance from the first end of the first refrigerant pipe 21 to the bottom shell 231 is 10 mm.

In the middle refrigeration mode, the higher the power of the air conditioner is, the more beneficial to APF under the condition that the refrigeration capacity meets the national standard requirement, and the lower the power of the air conditioner is, the more beneficial to APF under the condition that the capacity meets the national standard requirement.

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

As can be seen from the data in table 1, compared with the air conditioner 2 in which the liquid storage and splitting device 2 is not arranged in the outdoor heat exchanger, the outdoor heat exchanger provided by the embodiment of the disclosure is provided with the air conditioner 1 of the liquid storage and splitting device 2, so that the power of the air conditioner in the intermediate refrigeration mode is improved, and the power of the air conditioner in the low-temperature intermediate refrigeration mode is reduced. Therefore, the heat exchanger provided with the liquid storage and distribution device 2 improves the APF of the air conditioner.

Optionally, the number of the second refrigerant tubes 22 is multiple, the number of the heat exchange branches in the second part heat exchange branch 5 is multiple, and the plurality of the second refrigerant tubes 22 are respectively communicated with the plurality of the heat exchange branches in the second part heat exchange branch 5 one by one.

The second part of heat exchange branch 5 comprises a plurality of heat exchange branches which are connected in parallel. The number of the second refrigerant tubes 22 may be plural. The plurality of second refrigerant pipes 22 are respectively in one-to-one communication with the plurality of heat exchange branches in the second part heat exchange branch 5, so that each heat exchange branch in the second part heat exchange branch 5 is provided with a second refrigerant pipe 22 corresponding to the heat exchange branch.

When the number of the second refrigerant pipes 22 is multiple and the number of the heat exchange branches in the second part heat exchange branch 5 is multiple, when the high-pressure refrigerant flowing out of the first part heat exchange branch 4 flows into the liquid storage and distribution cavity through the first refrigerant pipe 21, the amount of the refrigerant flowing into different second refrigerant pipes 22 is easily different due to the turbulence of the refrigerant, so that the heat exchange capacity of the second part heat exchange branch 5 of the heat exchanger is uneven, and the heat exchange uniformity of the heat exchanger is reduced.

When the number of the second refrigerant pipes 22 is plural, and the number of the heat exchange branches in the second part heat exchange branch 5 is plural, the distance from the first end of the first refrigerant pipe 21 to the bottom shell 231 is greater than or equal to 10 mm, so that the impact between the high-pressure refrigerant and the bottom shell 231 of the liquid storage and distribution device 2 is reduced, the turbulence phenomenon of the refrigerant in the liquid storage and distribution cavity caused by the high-pressure refrigerant is reduced, and the uniformity of the refrigerant quantity flowing into each second refrigerant pipe 22 is improved.

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

TABLE 2

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

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

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

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

Therefore, in the heat exchanger provided by the embodiment of the disclosure, when in the rated refrigeration mode, the intermediate refrigeration mode and the low-temperature intermediate refrigeration mode, the outlet temperatures of the heat exchange branch 1, the heat exchange branch 2 and the heat exchange branch 3 of the second part of heat exchanger branches are not greatly different. Therefore, in the heat exchanger provided by the embodiment of the disclosure, when the number of the heat exchange branches in the second heat exchange branches is multiple and the number of the second refrigerant pipes 22 is multiple, the uniformity of the amount of the refrigerant flowing into each second refrigerant pipe 22 is improved, and then the heat exchange uniformity of the whole heat exchanger in different refrigeration modes is improved.

Optionally, each of the second refrigerant tubes 22 includes a first end extending into the liquid storage diversion cavity, where the distances from the first ends of the plurality of second refrigerant tubes 22 to the bottom shell 231 of the liquid storage shell 23 are the same.

The distances from the first ends of the plurality of second refrigerant tubes 22 to the bottom shell 231 of the liquid storage shell 23 are the same, so that the uniformity of the refrigerant flowing out through each second refrigerant tube 22 is further improved. Alternatively, the bottom shell 231 of the reservoir housing 23 is planar.

Alternatively, the vertical distances from the first ends of the plurality of second refrigerant tubes 22 to the first refrigerant tube 21 are the same.

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

Alternatively, the distances between every two adjacent second refrigerant tubes 22 are equal.

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

The first part heat exchange branch 4 comprises a plurality of heat exchange branches, and the plurality of heat exchange branches in the first part heat exchange branch 4 are communicated in parallel when the air conditioner operates in a refrigeration mode. The liquid separation branch pipes of the liquid separation device 3 are communicated with the heat exchange branch pipes of the first part heat exchange branch pipe 4 one by one, refrigerant flowing out of the plurality of heat exchange branch pipes of the first part heat exchange branch pipe 4 is converged to the converging cavity of the liquid separation device 3, and the refrigerant flows into the liquid storage and distribution cavity of the liquid storage and distribution device 2 through the converging pipe orifice communicated with the converging cavity. Optionally, the volume of the liquid storage diversion cavity is larger than the volume of the confluence cavity.

Optionally, the liquid storage and distribution device 2 and the heat exchanger body 1 are in an integrated structure, and the liquid storage and distribution device 2 is arranged at the side part of the heat exchanger body 1.

In the state of use of the heat exchanger, the liquid separating device 3 and the liquid storage and distributing device 2 are arranged on the side part of the heat exchanger body 1, and the liquid separating device 3 is arranged on the upper part of the liquid storage and distributing device 2. Optionally, the outlets of the heat exchange branches in the first part of heat exchange branches 4 are all arranged at the upper parts of a plurality of liquid separation branches of the liquid separation device 3. Optionally, the first end of the second refrigerant pipe 22 is disposed at an upper inlet of the heat exchange branch in the second partial heat exchange branch 5. Is favorable for the flow of the refrigerant in the heat exchanger.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only 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 refrigerant conditioning heat exchanger, comprising:

the heat exchanger body is provided with a heat exchange branch; and, a step of, in the first embodiment,

the liquid storage and distribution device comprises a liquid storage shell, a first refrigerant pipe and a second refrigerant pipe, wherein the liquid storage shell forms a liquid storage and distribution cavity, the first end of the first refrigerant pipe and the first end of the second refrigerant pipe are communicated with the liquid storage and distribution cavity,

wherein the first refrigerant pipe is communicated with the heat exchange branch, the liquid storage and distribution device is used for partially storing the refrigerant flowing out of the heat exchange branch in the liquid storage and distribution cavity, and the refrigerant flows out of the second refrigerant pipe,

the liquid storage and distribution device is provided with a heating element so as to heat the refrigerant in the liquid storage and distribution cavity.

2. The refrigerant heat exchanger according to claim 1 wherein,

the heating element is arranged at the lower part of the liquid storage shell.

3. The refrigerant heat exchanger according to claim 2 wherein,

the liquid storage shell comprises a bottom shell,

wherein the first end of the first refrigerant pipe and the first end of the second refrigerant pipe extend into the liquid storage and diversion cavity, the distance from the first end of the first refrigerant pipe to the bottom shell is smaller than the distance from the first end of the second refrigerant pipe to the bottom shell,

the heating element is arranged between the first end of the first refrigerant pipe and the bottom shell.

4. A heat exchanger according to claim 3 wherein,

the distance from the first end of the first refrigerant pipe to the bottom shell is greater than or equal to 10 millimeters.

5. The refrigerant heat exchanger according to claim 1 wherein,

the heating element comprises an electromagnetic heating coil.

6. The refrigerant heat exchanger according to claim 1 wherein,

the heat exchanger body is provided with a plurality of heat exchange branches,

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

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

8. The air conditioner according to claim 7, further comprising a compressor, a four-way valve and an indoor heat exchange assembly, wherein the refrigerant adjusting heat exchanger is an outdoor heat exchanger,

the air conditioner further includes a control section configured to:

when the air conditioner operates under a heating working condition, the heating element is controlled to be started so as to heat the refrigerant in the liquid storage and distribution cavity, so that the refrigerant in the liquid storage and distribution cavity flows out through the first refrigerant pipe, and the circulation quantity of the refrigerant participating in the heating working condition is improved.

9. The air conditioner according to claim 8, wherein,

the control section is further configured to:

when the air conditioner operates under a heating working condition, the heating element is controlled to be started so as to heat the refrigerant in the liquid storage and distribution cavity, the temperature of the refrigerant flowing through the heat exchanger body is improved, and the heat exchanger body is defrosted.

10. An air conditioner according to any one of claims 7 to 9, wherein,

the indoor heat exchange assembly comprises a plurality of indoor heat exchangers which are arranged in parallel.