CN117387258A - Heat exchange device for refrigerant circulation system and refrigerant circulation system - Google Patents

Abstract

The application relates to the technical field of air conditioning and discloses a heat exchange device for a refrigerant circulation system, wherein the heat exchange device comprises a shell and a throttle plate, a heat exchange space is defined in the shell, and a refrigerant inlet and a refrigerant outlet which are communicated with the heat exchange space are formed in the shell; the throttle plate is arranged in the shell, a throttle flow passage is defined in the throttle plate, and the refrigerant flowing through the throttle plate exchanges heat with the refrigerant flowing through the heat exchange space. By using the heat exchange device disclosed by the application, the cooling capacity loss of a refrigerant circulation system can be reduced. The application also discloses a refrigerant circulation system.

Description

Heat exchange device for refrigerant circulation system and refrigerant circulation system

Technical Field

The present application relates to the field of air conditioning technologies, and for example, to a heat exchange device for a refrigerant circulation system and a refrigerant circulation system.

Background

In the refrigerant circulation system, the larger the supercooling degree of the liquid refrigerant flowing out of the condenser is, the better the flowing stability of the refrigerant is, and the better the refrigerating and heating effects of the refrigerant circulation system are. A supercooling pipe section is usually arranged at the tail section of the condenser so as to obtain a certain supercooling degree of the liquid refrigerant. This process is also referred to as primary subcooling. The length of the supercooling pipe section is increased due to the temperature difference between the liquid refrigerant in the supercooling pipe section and the environment, and the supercooling degree is improved only to a limited extent.

In order to further improve the supercooling degree of the liquid refrigerant, an air conditioner is disclosed in the related art, which comprises an auxiliary gas-liquid separator for separating the refrigerant flowing out of the outdoor heat exchanger and throttled into gas and liquid, a plate heat exchanger for secondary supercooling and an auxiliary electronic expansion valve, wherein a main flow path of the plate heat exchanger sends the liquid refrigerant into an indoor unit, and an auxiliary flow path sends the gas refrigerant throttled by the auxiliary electronic expansion valve into the outdoor unit. In the air conditioner in the related art, the temperature of the refrigerant in the main flow path is reduced through the evaporation and heat absorption of the refrigerant in the auxiliary flow path in the plate heat exchanger, so that the supercooling degree of the refrigerant in the main flow path is further improved.

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:

when the refrigerant flows through the electronic expansion valve of the auxiliary flow path, heat is absorbed from the environment, and thus, the cooling capacity of the refrigerant circulation system is lost.

It should be noted that the information disclosed in the foregoing background section is only for enhancing understanding of the background of the present application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

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 heat exchange device for a refrigerant circulation system and the refrigerant circulation system so as to reduce the cooling capacity loss of the refrigerant circulation system.

In some embodiments, the heat exchange device for a refrigerant circulation system comprises a shell and a throttle plate, wherein the interior of the shell defines a heat exchange space, and the shell is provided with a refrigerant inlet and a refrigerant outlet which are communicated with the heat exchange space; the throttle plate is arranged in the shell, a throttle flow passage is defined in the throttle plate, and the refrigerant flowing through the throttle plate exchanges heat with the refrigerant flowing through the heat exchange space.

In some embodiments, a plurality of throttle plates are included, the plurality of throttle plates being disposed side-by-side.

In some embodiments, the throttle plate comprises a blow-up plate.

In some embodiments, the housing defines a first interface and a second interface, the first end of the throttling flow passage is in butt joint with the first interface, and the second end of the throttling flow passage is in butt joint with the second interface.

In some embodiments, the heat exchange device further comprises a connecting pipe, a first end of the connecting pipe is in butt joint with the first interface, and a second end of the connecting pipe is communicated with the heat exchange space of the shell.

In some embodiments, the first interface is provided on a downward side of the housing.

In some embodiments, the second interface is provided on an upward side of the housing.

In some embodiments, the equivalent diameter of the throttling flow passage is less than or equal to 4 millimeters.

In some embodiments, the equivalent diameter of the connecting tube is less than or equal to 4 millimeters.

In some embodiments, the heat exchange device further comprises a baffle disposed in the housing, the baffle separating the heat exchange space into multiple layers of end-to-end refrigerant flow channels.

In some embodiments, the air guide device comprises a plurality of air guide plates, wherein one part of the air guide plates extend inwards from the first side wall of the shell and are abutted against one surface of the air guide plates, and the other part of the air guide plates extend inwards from the second side wall of the shell and are abutted against the other surface of the air guide plates.

In some embodiments, the refrigerant circulation system includes a compressor, a condenser, a throttling device, an evaporator, and the heat exchange device described above; wherein, the air suction end of the compressor is communicated with the air outlet end of the throttling flow passage; the liquid outlet end of the condenser is communicated with the refrigerant inlet of the main pipeline, and the air inlet end is communicated with the exhaust of the compressor; the liquid inlet end of the throttling device is communicated with the refrigerant outlet of the shell; the liquid inlet end of the evaporator is communicated with the liquid outlet end of the throttling device, and the gas outlet end of the evaporator is communicated with the gas suction end of the compressor.

The device for the refrigerant circulation system and the refrigerant circulation system provided by the embodiment of the disclosure can realize the following technical effects:

the evaporation heat absorption of the refrigerant in the throttle plate is used for cooling the refrigerant flowing through the heat exchange space, so that the cooling capacity loss of the refrigerant circulation system can be reduced; the throttle plate is arranged in the heat exchange space of the shell, the heat exchange area is larger, and the refrigerant flowing through the throttle flow passage and the refrigerant flowing through the heat exchange space can achieve better heat exchange effect.

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 heat exchange device for a refrigerant circulation system according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of another heat exchange device for a refrigerant circulation system according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a heat exchanger housing for a refrigerant circulation system according to an embodiment of the present disclosure;

FIG. 4 is a schematic view of a heat exchange device for a refrigerant circulation system according to an embodiment of the present disclosure, wherein the heat exchange device includes a housing and a baffle;

FIG. 5 is a schematic view of another heat exchange device for a refrigerant circulation system according to an embodiment of the present disclosure;

fig. 6 is a schematic structural diagram of a refrigerant circulation system according to an embodiment of the disclosure.

Reference numerals:

100: a housing; 101: a heat exchange space; 102: a refrigerant inlet; 103: a refrigerant outlet; 104: a first interface; 105: a second interface; 200: a throttle plate; 201: a throttle flow passage; 300: a deflector; 10: a heat exchange device; 20: a compressor; 21: an air suction port; 22: an ejection port; 30: a condenser; 40: a throttle device; 50: an evaporator.

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 will be appreciated that the data so used may be interchanged where appropriate. 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.

In the refrigerant circulation system, the larger the supercooling degree of the liquid refrigerant flowing out of the condenser is, the better the flowing stability of the refrigerant is, and the better the refrigerating and heating effects of the refrigerant circulation system are. A supercooling pipe section is usually arranged at the tail section of the condenser so as to obtain a certain supercooling degree of the liquid refrigerant. This process is also referred to as primary subcooling. The length of the supercooling pipe section is increased due to the temperature difference between the liquid refrigerant in the supercooling pipe section and the environment, and the supercooling degree is improved only to a limited extent. In order to further improve the supercooling degree of the liquid refrigerant, an air conditioner is disclosed in the related art, which comprises an auxiliary gas-liquid separator for separating the refrigerant flowing out of the outdoor heat exchanger and throttled into gas and liquid, a plate heat exchanger for secondary supercooling and an auxiliary electronic expansion valve, wherein a main flow path of the plate heat exchanger sends the liquid refrigerant into an indoor unit, and an auxiliary flow path sends the gas refrigerant throttled by the auxiliary electronic expansion valve into the outdoor unit. In the air conditioner in the related art, the temperature of the refrigerant in the main flow path is reduced through the evaporation and heat absorption of the refrigerant in the auxiliary flow path in the plate heat exchanger, so that the supercooling degree of the refrigerant in the main flow path is further improved. The related art has a problem in that the refrigerant absorbs heat from the environment when flowing through the electronic expansion valve of the auxiliary flow path, which causes a loss of cooling capacity of the refrigerant circulation system.

In order to reduce the cooling capacity loss of the refrigerant circulation system, referring to fig. 1-5, an embodiment of the disclosure provides a heat exchange device for a refrigerant circulation system, the heat exchange device includes a housing 100 and a throttle plate 200, wherein a heat exchange space 101 is defined in the housing 100, and the housing 100 is provided with a refrigerant inlet 102 and a refrigerant outlet 103 which are communicated with the heat exchange space 101; the throttle plate 200 is disposed in the housing 100, and a throttle channel 201 is defined in the throttle plate 200, so that the refrigerant flowing through the throttle plate 200 exchanges heat with the refrigerant flowing through the heat exchange space 101.

In the embodiment of the present disclosure, the housing 100 has a space for flowing and exchanging heat of a liquid refrigerant or a gaseous refrigerant inside. Illustratively, the housing 100 is connected in series to the main circuit of the refrigerant circulation system via a refrigerant inlet 102 and a refrigerant outlet 103.

The throttle flow path 201 of the throttle plate 200 is used to provide throttle resistance, and to block the high and low pressure environments at both ends of the throttle flow path 201 in a state where both ends connected to the throttle flow path 201 are in communication. When the high-pressure liquid refrigerant flows through the throttle flow passage 201, the refrigerant evaporates into a gaseous state due to the pressure decrease, and absorbs heat during the evaporation. Illustratively, the throttle plate 200 may be a throttle device of a refrigerant circulation system, and the refrigerant flowing out of the condenser enters the evaporator after being throttled and depressurized by the throttle plate 200.

In the case of the air conditioner operating in the cooling mode, the heat absorption of the throttle plate 200 from the environment causes an increase in the enthalpy of the refrigerant in the refrigerant circulation system, i.e., causes a loss of cooling capacity of the refrigerant circulation system. Therefore, the throttle plate 200 is disposed in the housing 100, and the refrigerant in the throttle channel 201 absorbs heat from the refrigerant in the heat exchange space 101, thereby reducing the temperature of the refrigerant flowing through the heat exchange space 101. In this way, the temperature of the refrigerant flowing through the throttle plate 200 can be reduced, and when the refrigerant flowing through the main pipeline is a liquid refrigerant, the liquid refrigerant can obtain a larger supercooling degree.

When the refrigerant flows through the throttling flow passage which plays a role in throttling, the refrigerant is mainly in a liquid state in the first section of the throttling flow passage, the flow speed is not greatly changed, and the pressure of the refrigerant is linearly reduced. The temperature difference between the refrigerant and the external environment of the throttling flow passage in the section is smaller, and the heat exchange is smaller. When the heat exchange refrigerant flows to the second section of the throttling flow passage, evaporation starts due to pressure reduction. The volume expansion flow velocity is increased after the refrigerant is evaporated, and the pressure drop of the refrigerant is larger at the section. The evaporation heat absorption of the cooling medium in the section is increased, and heat is absorbed from the environment where the throttling flow passage is located through the pipe wall of the throttling flow passage in the evaporation process. When the refrigerant flows to the end section of the second section of the throttling flow passage, the flow velocity of the gaseous refrigerant reaches the maximum, and the flow velocity cannot be further increased. The temperature of the evaporated refrigerant is lower, and the refrigerant continuously exchanges heat with the pipe wall wound by the throttling flow passage through the pipe wall of the throttling flow passage. Meanwhile, the wall of the throttling flow passage has certain heat conductivity, the temperature of the first section of the throttling flow passage is lower than the temperature of the appearance, and the refrigerant flowing through the first section of the throttling flow passage exchanges heat with the refrigerant in the outer tube. The throttling and the evaporation of the refrigerant are completed in a throttling flow passage, and the throttling flow passage equivalently plays roles of throttling and heat exchange.

By using the heat exchange device provided by the embodiment of the disclosure, the heat absorption of the refrigerant in the throttle plate 200 can be used for cooling the refrigerant flowing through the heat exchange space 101, so that the cooling capacity loss of the refrigerant circulation system is reduced; the throttle plate 200 is disposed in the heat exchange space 101 of the housing 100, and has a larger heat exchange area, so that the refrigerant flowing through the throttle channel 201 and the refrigerant flowing through the heat exchange space 101 can achieve a better heat exchange effect.

Alternatively, the throttle runner 201 of the throttle plate 200 is S-shaped.

With such an arrangement, the length of the throttle flow path 201 can be increased in the case where the throttle plate 200 is sized. The length of the throttle runner 201 is large, and accordingly the equivalent diameter can be set to a large size. This increases the heat exchange area between the refrigerant in the throttle plate 200 and the refrigerant in the heat exchange space 101, and reduces the risk of clogging the throttle flow passage 201.

Optionally, the heat exchange device comprises a plurality of baffles 200, the plurality of baffles 200 being arranged side by side.

By adopting the arrangement mode, the heat exchange area between the throttle plate 200 and the refrigerant in the heat exchange space 101 is larger, and the refrigerant flowing through the heat exchange space 101 can achieve better heat exchange effect.

The plurality of throttle plates 200 may be independently provided as a plurality of throttle devices, respectively. Illustratively, the heat exchange device includes a first throttle plate 200 and a second throttle plate 200, the first throttle plate 200 serving as a throttle device of the entire refrigerant circulation system, and the second throttle plate 200 serving as a throttle device of the heat exchange device. That is, for the refrigerant circulation system, a part of the liquid refrigerant flowing out of the evaporator enters the evaporator after being throttled and depressurized by the first throttle plate 200, and the other part of the refrigerant is throttled and depressurized by the second throttle plate 200 and reduces the temperature of the refrigerant flowing through the heat exchange space 101 during the evaporation process. With the adoption of the arrangement mode, when the refrigerant circulation is provided with a plurality of throttling devices, the evaporation heat absorption of the refrigerant in the plurality of throttling devices can be utilized, so that the cooling capacity loss of the refrigerant circulation system is further reduced.

Optionally, a plurality of throttle plates 200 are connected in series.

In this case, the plurality of throttle plates 200 collectively function as one throttle device. With such an arrangement, the length of the throttle flow passage 201 can be increased. In the case where the restriction capability is constant, the cross section of the restriction flow passage 201 is large. This can increase the mass flow rate of the refrigerant in the throttle flow passage 201, thereby improving the cooling effect for the refrigerant flowing through the heat exchanging space 101.

Optionally, a plurality of throttle plates 200 are connected in parallel.

Also in this case, the plurality of throttle plates 200 collectively function as one throttle device. With such an arrangement, a plurality of throttle plates 200 can achieve a good throttle effect even in the case where the diameter of the throttle flow path 201 is small.

Optionally, the throttle plate 200 comprises a blow-up plate.

The blow-up plate is easy to machine and form, and a relatively complex throttle runner 201 can be constructed in the throttle plate 200. The throttle plate 200 comprises a blow-up plate, which is beneficial to reducing the cost of the heat exchange device and improving the working reliability of the heat exchange device.

Optionally, the liquid inlet end of the throttling channel 201 is open to the heat exchange space 101.

In the case where the liquid outlet end of the throttle flow path 201 has suction pressure, the refrigerant in the heat exchange space 101 enters the throttle flow path 201 from the liquid inlet end of the throttle flow path 201. In this case, a part of the refrigerant entering the heat exchange space 101 is used as a cooling target, and another part of the refrigerant is used as a means for cooling. Specifically, a part of the liquid refrigerant entering the throttling channel 201 evaporates to absorb heat, thereby reducing the temperature of another part of the liquid refrigerant in the heat exchange space 101.

By adopting the arrangement form, the structure of the heat exchange device can be simplified, and the manufacturing and assembling difficulties of the heat exchange device are reduced.

Optionally, the housing 100 is provided with a first interface 104 and a second interface 105, a first end of the throttle runner 201 is in butt joint with the first interface 104, and a second end of the throttle runner 201 is in butt joint with the second interface 105.

The housing 100 is provided with a first interface 104 and a second interface 105, so that the refrigerant flow passage of the throttle plate 200 can be communicated with the external environment through the first interface 104 and the second interface 105. Specifically, the first end of the refrigerant flow channel is in butt joint with the first interface 104, and the second end of the refrigerant flow channel is in butt joint with the second interface 105.

Illustratively, as an implementation form in which the first end of the refrigerant flow channel is butted against the first interface 104, the housing 100 is provided with a butting window, and the first end of the throttle flow channel 201 is welded to the butting window through a butting pipe. As another implementation form, the first interface 104 and the second interface 105 of the housing 100 are docking windows, and docking pipes connected to two ends of the throttling flow passage 201 penetrate out of the docking windows, and side walls of the docking pipes are welded with inner rings of the docking windows. With such an arrangement, the housing 100 has a good sealing property, and the throttle passage 201 can be conveniently connected to other pipes outside the housing 100.

Optionally, the heat exchange device further includes a connection pipe, a first end of the connection pipe is in butt joint with the first interface 104, and a second end of the connection pipe is communicated with the heat exchange space 101 of the housing 100.

The connection pipe is used to introduce the liquid refrigerant into the throttle plate 200. Specifically, one end of the connection pipe is connected to the first port 104 of the main pipe to be abutted with the throttle channel 201, and the second end of the connection pipe is connected to the refrigerant inlet 102 of the housing 100. In this case, the liquid refrigerant flowing to the heat exchanging device is divided into two parts, one part continues to flow along the heat exchanging space 101 of the housing 100, and the other part enters the throttle flow passage 201 of the throttle plate 200 through the connection pipe. The liquid refrigerant introduced into the throttle flow path 201 is reduced in pressure during the flow, thereby evaporating and absorbing heat. The refrigerant in the throttle plate 200 absorbs heat from the liquid refrigerant in the heat exchange space 101 when evaporating, thereby improving the supercooling degree of the liquid refrigerant in the heat exchange space 101. By adopting the arrangement form, the liquid refrigerant flowing through the heat exchange space 101 can obtain larger supercooling degree so as to obtain better flow stability, thus being beneficial to the refrigeration operation and the heating operation of the refrigerant circulation system.

Optionally, the second interface 105 is formed on an upward side of the housing 100.

The upwardly facing side of the housing 100 is referred to as the heat exchanger in use. Illustratively, with the housing 100 disposed vertically, the second interface 105 opens at an upward end face of the housing 100; in the case that the housing 100 is disposed laterally, the second port 105 is opened at a side surface of the housing 100, and the second port 105 is opened upward. The second interface 105 is disposed on an upward side of the housing 100, and the refrigerant can complete gas-liquid separation in the heat exchange space 101 under the effect of the density difference of the gas-liquid two-phase refrigerant, so as to avoid the liquid refrigerant flowing out from the second interface 105.

Optionally, the first interface 104 is formed on a downward surface of the housing 100.

Likewise, the downward facing side of the housing 100 is referred to as the heat exchanger in use. The first interface 104 is disposed on a downward side of the housing 100, so as to improve the ordering of the refrigerant flowing in the heat exchange space 101, and reduce the noise generated when the liquid refrigerant enters the heat exchange space 101 during the operation of the refrigerant circulation system.

Optionally, the first port 104 is located in front of the second port 105 along the flow direction of the refrigerant in the heat exchange space 101.

The refrigerant evaporates gradually more and the temperature gradually decreases in the direction of the flow of the refrigerant in the throttle flow passage 201. I.e., the temperature in the throttle flow path 201 is gradually decreased in the direction of the refrigerant flow. The first port 104 is located in front of the second port 105, and the flow direction of the refrigerant in the throttle flow passage 201 is opposite to the flow direction of the refrigerant in the refrigerant flow passage. The temperature of the refrigerant in the refrigerant flow channel gradually decreases in the flow direction as the refrigerant flows through the outer wall of the throttle flow channel 201. With the arrangement, the refrigerant in the throttle flow channel 201 and the refrigerant in the heat exchange space 101 have a larger temperature difference at a position close to the second interface 105, so that the heat exchange effect between the refrigerant in the throttle flow channel 201 and the refrigerant in the heat exchange space 101 is improved.

Optionally, the diameter of the throttling channel is greater than or equal to 1.5 millimeters.

In general, the combination of the length and the inner diameter of the capillary tube is to balance the mass flow rate of the refrigerant in the throttle tube, the throttle resistance and the refrigerant filling amount of the refrigerant circulation system to achieve the highest refrigeration efficiency. For the throttling flow passage, the refrigerant flowing through the throttling main pipe is less, the association relation between the mass flow and the refrigerant filling amount is weaker, and the throttling flow passage can be provided with a longer length and a larger pipe diameter so as to improve the heat exchange effect.

Alternatively, the equivalent diameter of the throttle flow path 201 is less than or equal to 4 millimeters.

The diameter of the throttling flow passage 201 is smaller than or equal to 4 mm, so that a good throttling and depressurization effect can be achieved. In addition, the equivalent diameter of the throttling flow passage 201 is larger, the heat exchange area between the refrigerant in the throttling branch pipe and the refrigerant in the refrigerant flow passage is larger, and a better heat exchange effect can be obtained between the refrigerant in the throttling branch pipe and the refrigerant flow passage.

Optionally, the equivalent diameter of the connecting tube is less than or equal to 4 millimeters.

The diameter of the connecting pipe is smaller than or equal to 4 mm, and the connecting pipe can play a certain role in throttling and depressurization. By adopting the arrangement form, the refrigerant is favorable for evaporating and absorbing heat in the throttling branch pipe.

Optionally, the heat exchange device further includes a baffle 300, where the baffle 300 is disposed in the housing 100, and the baffle 300 separates the heat exchange space 101 into multiple layers of end-to-end refrigerant channels.

The baffle 300 partitions the heat exchanging space 101, and can increase the stroke of the refrigerant in the heat exchanging space 101 when the size of the casing 100 is fixed. With such arrangement, the refrigerant flowing through the heat exchange space 101 and the refrigerant in the throttle plate 200 can exchange heat more sufficiently.

Optionally, the air guide device includes a plurality of air guide plates 300, wherein a part of the air guide plates 300 of the plurality of air guide plates 300 extend inward from a first sidewall of the housing 100 and abut against one surface of the air guide plates 300, and another part of the air guide plates 300 of the plurality of air guide plates 300 extend inward from a second sidewall of the housing 100 and abut against the other surface of the air guide plates 300.

The plurality of baffles 300 are used to fix the throttle plate 200 while increasing the refrigerant stroke. Under the fixing action of the plurality of guide plates 300, the throttle plate 200 is not contacted with the first side wall or the second side wall of the shell 100, and the throttle plate 200 is not easy to damage due to collision. In addition, the throttle plate 200 is not in contact with the first and second sidewalls of the case 100, and the loss of cold caused by heat conduction of the throttle plate 200 through the inner wall of the case 100 can be reduced.

Alternatively, the side of the baffle 300 facing the throttle plate 200 is configured with a groove, and the throttle runner 201 of the throttle plate 200 protrudes from the plate surface and is embedded in the groove.

With such arrangement, the baffle 300 and the throttle plate 200 are in seamless connection, so that the refrigerant in the heat exchanging space 101 flows according to a preset path.

Optionally, the refrigerant inlet 102 of the housing 100 is higher than the refrigerant outlet 103 of the housing 100.

In the heat exchange space 101 of the shell 100, the gas-liquid two-phase refrigerant is separated under the effect of density difference, and the liquid refrigerant is positioned at the lower part of the heat exchange space 101. The refrigerant inlet 102 of the housing 100 is higher than the refrigerant outlet 103 of the housing 100, so that the outflow of the gaseous refrigerant from the refrigerant outlet 103 of the heat exchange device can be reduced or avoided.

Referring to fig. 1-6, an embodiment of the present disclosure provides a refrigerant circulation system, which includes a compressor 20, a condenser 30, a throttling device 40, an evaporator 50, and the heat exchange device 10 described above; wherein, the air suction end of the compressor 20 is communicated with the air outlet end of the throttling flow passage 201; the liquid outlet end of the condenser 30 is communicated with the refrigerant inlet 102 of the main pipeline, and the air inlet end is communicated with the exhaust of the compressor 20; the liquid inlet end of the throttling device 40 is communicated with the refrigerant outlet 103 of the shell 100; the liquid inlet end of the evaporator 50 is connected to the liquid outlet end of the throttle device 40, and the air outlet end is connected to the air suction end of the compressor 20.

The refrigerant circulation system provided by the embodiment of the disclosure is a refrigerant circulation system with a secondary supercooling function. Illustratively, the refrigerant circulation system cools the high temperature refrigerant discharged through the compressor 20 during the cooling condition in the condenser 30. The high-temperature gaseous refrigerant is condensed into a high-pressure liquid refrigerant in the condenser 30, and flows to the heat exchanger 10. The high-pressure liquid refrigerant entering the heat exchange device 10 continues to flow partially along the main pipeline and partially along the throttling branch pipe. The pressure of the refrigerant entering the throttling branch pipe is reduced, and the refrigerant evaporates into a gaseous state. In the evaporation process of the refrigerant, heat is absorbed from the refrigerant in the main pipeline, so that the temperature of the high-pressure liquid refrigerant in the main pipeline is reduced, namely the supercooling degree of the high-pressure liquid refrigerant in the main pipeline is increased. The evaporated gaseous refrigerant returns to the suction end of the compressor 20 along the throttle pipe. The liquid refrigerant in the main pipeline sequentially flows through the throttling device 40, throttles and depressurizes, then enters the evaporator 50, absorbs heat in evaporation and returns to the suction end of the compressor 20.

By using the refrigerant circulation system provided by the embodiment of the disclosure, the evaporation heat absorption of the refrigerant in the throttling branch pipe can be used for cooling the refrigerant in the main pipeline, so that the cooling capacity loss of the refrigerant circulation system is reduced; the throttling branch pipe is arranged in the main pipeline, the heat exchange area inside and outside the throttling branch pipe is larger, and the refrigerant flowing through the throttling branch pipe and the refrigerant flowing through the main pipeline can achieve better heat exchange effect.

Optionally, the suction end of the compressor 20 includes a suction port 21 and a jet port 22, the suction port 21 being in communication with the outlet end of the evaporator 50, the jet port 22 being in communication with the second port 105 of the outer tube.

The compressor 20 is a rotor compressor 20, and a piston cylinder of the rotor compressor 20 is provided with an air inlet and an injection port 22. When the suction pressure of the compressor 20 is high, the compressor 20 sucks the gaseous refrigerant from the heat exchange space 101 of the heat exchange device 10, thereby increasing the refrigerant mass flow rate in the refrigerant circulation system. By this form of the enhanced vapor injection, the heating effect of the compressor 20, particularly in a low temperature environment, can be improved.

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 heat exchange device for a refrigerant circulation system, comprising:

the shell is internally provided with a refrigerant inlet and a refrigerant outlet which are communicated with the heat exchange space;

the throttle plate is arranged in the shell, a throttle flow passage is defined in the throttle plate, and the refrigerant flowing through the throttle flow passage exchanges heat with the refrigerant flowing through the heat exchange space.

2. A heat exchange device according to claim 1, wherein,

the device comprises a plurality of throttle plates which are arranged side by side.

3. A heat exchange device according to claim 1, wherein,

the throttle plate includes a blow-up plate.

4. A heat exchange device according to claim 1, wherein,

the shell is provided with a first interface and a second interface, the first end of the throttling flow passage is in butt joint with the first interface, and the second end of the throttling flow passage is in butt joint with the second interface.

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

the first end of the connecting pipe is butted with the first interface, and the second end of the connecting pipe is communicated with the heat exchange space of the shell.

6. A heat exchange device according to claim 5 wherein,

the first interface is arranged on one downward surface of the shell; and/or the number of the groups of groups,

the second interface is arranged on one upward surface of the shell.

7. A heat exchange device according to claim 5 wherein,

the equivalent diameter of the throttling flow passage is smaller than or equal to 4 mm; and/or the number of the groups of groups,

the equivalent diameter of the connecting pipe is less than or equal to 4 mm.

8. The heat exchange device according to any one of claims 1 to 7, further comprising:

the guide plate is arranged in the shell and divides the heat exchange space into a plurality of layers of refrigerant flow channels which are connected end to end.

9. A heat exchange device according to claim 8 wherein,

the novel air conditioner comprises a plurality of guide plates, wherein one part of the guide plates extend inwards from a first side wall of the shell and are abutted to one surface of the guide plates, and the other part of the guide plates extend inwards from a second side wall of the shell and are abutted to the other surface of the guide plates.

10. A refrigerant circulation system, comprising:

a heat exchange device according to any one of claims 1 to 9; and, a step of, in the first embodiment,

the air suction end of the compressor is communicated with the air outlet end of the throttling flow passage;

the liquid outlet end of the condenser is communicated with the refrigerant inlet of the main pipeline, and the air inlet end of the condenser is communicated with the exhaust of the compressor;

the liquid inlet end of the throttling device is communicated with the refrigerant outlet of the shell;

and the liquid inlet end of the evaporator is communicated with the liquid outlet end of the throttling device, and the air outlet end of the evaporator is communicated with the air suction end of the compressor.