Condenser and refrigeration system

Abstract

The application discloses a condenser and a refrigeration system. The condenser comprises a condenser shell, a condensing heat exchange pipe and a flasher. The condenser shell has a refrigerant inlet and a refrigerant outlet. The condensing heat exchange pipe is arranged in the condenser shell, the refrigerant enters the condenser shell from the refrigerant inlet to be condensed by the condensing heat exchange pipe and flows out through the refrigerant outlet. The flasher is arranged in the condenser shell and above the condensing heat exchange pipe. The flasher comprises a flash chamber and a cooling heat exchange pipe group. The flash chamber has a liquid inlet, a liquid outlet and a gas outlet. The liquid inlet of the flash chamber is connected with the refrigerant outlet so that the refrigerant is subjected to gas-liquid separation in the flash chamber, and the cooling heat exchange pipe group is connected with the gas outlet of the flash chamber. The condenser shell of the application is internally provided with the flasher, and the flasher is provided with the cooling heat exchange pipe group for circulating the separated gaseous refrigerant, so that the superheat degree of the gaseous refrigerant in the condenser is reduced, and the saturated temperature of the refrigerant during condensation is ensured, thereby improving the heat exchange efficiency.

Description

Technical Field

[0001] The invention relates to a condenser and a refrigeration system. Background Art

[0002] In a refrigeration system, the compressor applies energy to the refrigerant, raising its pressure and temperature. Then, through condensation and two throttling processes, it becomes a low-temperature, low-pressure liquid refrigerant that enters the evaporator. Inside the evaporator, the liquid refrigerant absorbs heat from the surrounding environment and evaporates into a gaseous refrigerant, achieving artificial cooling.

[0003] When the high-temperature and high-pressure gaseous refrigerant discharged from the compressor enters the condenser, the refrigerant is in an overheated state. Therefore, part of the refrigerant entering the condenser does not condense due to overheating, which in turn affects the heat exchange efficiency of the condenser.

[0004] It should be noted that the statements in this background technology section only provide background technology related to the present invention and do not necessarily constitute prior art. Summary of the Invention

[0005] The present invention provides a condenser and a refrigeration system to improve the heat exchange efficiency of the condenser.

[0006] A first aspect of the present invention provides a condenser, comprising:

[0007] A condenser shell having a refrigerant inlet and a refrigerant outlet;

[0008] The condensing heat exchange tube is arranged in the condenser shell. The refrigerant enters the condenser shell from the refrigerant inlet to be condensed through the condensing heat exchange tube and flows out through the refrigerant outlet.

[0009] The flasher is arranged in the condenser shell and located above the condensing heat exchange tube. The flasher includes a flash chamber and a cooling heat exchange tube group. The flash chamber has a liquid inlet, a liquid outlet and an air outlet. The liquid inlet of the flash chamber is connected to the refrigerant outlet so that the refrigerant can be separated into gas and liquid in the flash chamber. The cooling heat exchange tube group is connected to the air outlet of the flash chamber.

[0010] In some embodiments, the cooling heat exchange tube group is disposed on the lower side of the flash cavity.

[0011] In some embodiments, the cooling heat exchange tube group includes one heat exchange tube or multiple heat exchange tubes arranged side by side.

[0012] In some embodiments, the flash cavity comprises a slot-shaped cavity, and the sidewalls of the slot-shaped cavity are inclined.

[0013] In some embodiments, the cooling heat exchange tube group includes two cooling heat exchange subgroups respectively disposed on the outer sides of the side walls of the groove-shaped cavity.

[0014] In some embodiments, the flash cavity comprises a top wall, the top wall comprising a main section and end sections respectively arranged on both sides of the main section, the end sections being arranged obliquely relative to the main section.

[0015] In some embodiments, the flash vessel further comprises a gas collection cavity, the gas collection cavity being connected to the flash cavity and the cooling heat exchange tube group, the gaseous refrigerant separated by the flash being transferred from the flash cavity to the gas collection cavity and then to the cooling heat exchange tube group.

[0016] In some embodiments, the flash vessel further comprises a gas collection baffle arranged in the gas collection cavity.

[0017] In some embodiments, the flash vessel further comprises a gas outlet cavity, the gas outlet cavity being connected to the cooling heat exchange tube group, the gaseous refrigerant separated by the flash being transferred to the gas outlet cavity after passing through the cooling heat exchange tube group.

[0018] In some embodiments, the flash vessel further comprises a gas outlet baffle arranged in the gas outlet cavity.

[0019] In some embodiments, the flash vessel further comprises a gas collection cavity and a gas outlet cavity arranged at both ends of the flash cavity, the gas collection cavity comprising a gas collection port in communication with the gas outlet port of the flash cavity and a first heat exchange tube connecting port in communication with the cooling heat exchange tube group, the gas outlet cavity comprising a second heat exchange tube connecting port in communication with the cooling heat exchange tube group.

[0020] In some embodiments, the flash vessel further comprises a liquid blocking plate arranged in the flash cavity.

[0021] The second aspect of the present application provides a refrigeration system comprising a compressor, an evaporator and the above-mentioned condenser, the exhaust port of the compressor being connected to the refrigerant inlet of the condenser shell, the gas outlet port of the flash cavity being connected to the gas supplement port of the compressor, and the liquid outlet port of the flash cavity being connected to the evaporator.

[0022] Based on the technical scheme provided in the application, the condenser comprises a condenser shell, condensing heat exchange pipes and a flasher. The condenser shell has a refrigerant inlet and a refrigerant outlet. The condensing heat exchange pipes are arranged in the condenser shell, the refrigerant enters the condenser shell from the refrigerant inlet to be condensed by the condensing heat exchange pipes and flows out through the refrigerant outlet. The flasher is arranged in the condenser shell and above the condensing heat exchange pipes. The flasher comprises a flash chamber and a cooling heat exchange pipe group. The flash chamber has a liquid inlet, a liquid outlet and a gas outlet. The liquid inlet of the flash chamber is connected with the refrigerant outlet to make the refrigerant in the flash chamber undergo gas-liquid separation, and the cooling heat exchange pipe group is connected with the gas outlet of the flash chamber. The cooling heat exchange pipe group is used for flowing the gaseous refrigerant separated by the flasher. The gaseous refrigerant in the cooling heat exchange pipe group is throttled by the first-stage throttling device, and the temperature of the gaseous refrigerant is lower than that of the gaseous refrigerant entering the top of the condenser. Therefore, there is a temperature difference between the refrigerant in the cooling heat exchange pipe group and the refrigerant in the top of the condenser. By using the temperature difference, the cooling heat exchange pipe group can cool the overheated gas in the top of the condenser to realize pre-treatment, thereby reducing the overheating degree of the gaseous refrigerant in the condenser, and facilitating to ensure that the refrigerant reaches the saturation temperature during condensation, thereby improving the heat exchange efficiency. Moreover, when the refrigerant in the cooling heat exchange pipe group exchanges heat with the overheated gas in the top of the condenser, the refrigerant in the cooling heat exchange pipe group absorbs heat to further evaporate into gaseous state, thereby improving the dryness of the gaseous refrigerant output by the flasher, and avoiding the phenomenon of suction liquid generation when the flasher supplies gas to the compressor.

[0023] Other features of the present application, and their advantages, will become apparent in the non-limiting detailed description of the application, when read in conjunction with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

[0025] Figure 1 FIG. 1 is a structural schematic view of a condenser according to an embodiment of the present application.

[0026] Figure 2 FIG. 2 is a sectional view of the condenser shown in FIG. 1 in the B-B direction. Figure 1

[0027] Figure 3 FIG. 3 is a partial structural schematic view of a flasher according to an embodiment of the present application.

[0028] Figure 4 FIG. 4 is an exploded schematic view of the partial structure of the flasher shown in FIG. 3. Figure 3

[0029] Figure 5 ​​The exploded view of the flasher of the embodiment of the present application.

[0030] Figure 6 The structural view of the air outlet cavity of the embodiment of the present application. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to limit the present application and its application or uses in any way. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0032] Unless otherwise specifically explained, the relative arrangement of the components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application. Meanwhile, it should be understood that the sizes of the various parts shown in the drawings are not drawn in accordance with the actual proportional relationship for the convenience of description. The techniques, methods, and devices known to those of ordinary skill in the related art can not be discussed in detail, but should be considered as part of the specification under appropriate circumstances. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so further discussion of them is not necessary in subsequent drawings once they are defined in one drawing.

[0033] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper", and the like can be used herein to describe the spatial positional relationship of one device or feature with respect to other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device as described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" the other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways, and the spatial relative descriptions used herein are interpreted accordingly.

[0034] The refrigeration system further comprises a flash evaporator. The main function of the flash evaporator is to separate the gas-liquid two-phase refrigerant generated after throttling by the first-stage throttling device, and the separated gaseous refrigerant is returned to the compressor to supplement the air of the compressor, and the separated liquid refrigerant enters the second-stage throttling device.

[0035] In the related art, the flash evaporator is arranged outside the condenser, increasing the size of the unit. Moreover, it is found in the research process that there is a superheated region at the top of the condenser where no phase change occurs, thereby reducing the heat exchange efficiency of the condenser.

[0036] To solve the above problems, the embodiments of the present application provide a condenser. The condenser is provided with a built-in flash evaporator, and the flash evaporator is provided with a cooling heat exchange pipe group for circulating the separated gaseous refrigerant. The gaseous refrigerant circulating in the cooling heat exchange pipe group is separated by the flash evaporator. The temperature of this part of gaseous refrigerant is lower than that of the gaseous refrigerant entering the top of the condenser after throttling by the first-stage throttling device. Therefore, there is a temperature difference between the refrigerant in the cooling heat exchange pipe group and the refrigerant at the top of the condenser. By utilizing the temperature difference, the cooling heat exchange pipe group can cool the superheated gas at the top of the condenser to achieve pretreatment, thereby reducing the superheat degree of the gaseous refrigerant inside the condenser, and facilitating to ensure that the refrigerant reaches the saturation temperature during condensation, thereby improving the heat exchange efficiency. Moreover, when the refrigerant in the cooling heat exchange pipe group exchanges heat with the superheated gas at the top of the condenser, the refrigerant in the cooling heat exchange pipe group absorbs heat to further evaporate into a gaseous state, thereby improving the dryness of the gaseous refrigerant output by the flash evaporator, and avoiding the phenomenon of suction liquid generation when the flash evaporator supplements the air of the compressor.

[0037] Reference will be made to the following Figures 1 to 6 The structure and working process of the condenser of some embodiments of the present application will be described in detail.

[0038] Reference Figures 1 to 6 The condenser of some embodiments of the present application comprises a condenser shell 20, condensing heat exchange pipes 22 and a flash evaporator 10. The condenser shell 20 has a refrigerant inlet 21 and a refrigerant outlet 23. The condensing heat exchange pipes 22 are arranged in the condenser shell 20, the refrigerant enters the condenser shell 20 from the refrigerant inlet 21 to condense through the condensing heat exchange pipes 22, and flows out through the refrigerant outlet 23. The flash evaporator 10 is arranged in the condenser shell 20 and above the condensing heat exchange pipes 22. The flash evaporator 10 comprises a flash chamber 11 and a cooling heat exchange pipe group 19. The flash chamber 11 has a liquid inlet, a liquid outlet and a gas outlet. The liquid inlet of the flash chamber 11 is connected with the refrigerant outlet 23 to make the refrigerant separate into gas and liquid in the flash chamber 11, and the cooling heat exchange pipe group 19 is connected with the gas outlet of the flash chamber 11.

[0039] The condenser shell of the embodiment of the present application is internally provided with a flasher, and the flasher is provided with a cooling heat exchange pipe group 19 for circulating the separated gaseous refrigerant. The gaseous refrigerant separated by the flasher 10 circulates in the cooling heat exchange pipe group 19. The gaseous refrigerant in this part is throttled by the first-stage throttling device, and the temperature is lower than that of the gaseous refrigerant entering the top of the condenser. Therefore, there is a temperature difference between the refrigerant in the cooling heat exchange pipe group 19 and the refrigerant in the top of the condenser. By using the temperature difference, the cooling heat exchange pipe group 19 can cool the superheated gas in the top of the condenser to achieve pre-treatment, thereby reducing the superheat degree of the gaseous refrigerant in the condenser, and facilitating the refrigerant to reach the saturation temperature during condensation, thereby improving the heat exchange efficiency. Moreover, when the refrigerant in the cooling heat exchange pipe group 19 exchanges heat with the superheated gas in the top of the condenser, the refrigerant in the cooling heat exchange pipe group absorbs heat to further evaporate into a gaseous state, thereby increasing the dryness of the gaseous refrigerant output by the flasher, and avoiding the phenomenon of suction liquid entrainment when the flasher supplies gas to the compressor.

[0040] In some embodiments, the present application also provides a refrigeration system. The refrigeration system of some embodiments includes a compressor, an evaporator and a condenser. The exhaust port of the compressor is connected with the refrigerant inlet of the condenser shell. The gas outlet of the flash chamber 11 is connected with the gas supply port of the compressor, and the liquid outlet of the flash chamber 11 is connected with the evaporator.

[0041] The refrigeration system includes a compressor, a condenser, a first-stage throttling device, a flasher, a second-stage throttling device and an evaporator. The refrigerant flow path is as follows: the compressor discharges high-temperature and high-pressure gaseous refrigerant, the high-temperature and high-pressure gaseous refrigerant enters the condenser to condense and release heat to form high-temperature and high-pressure liquid refrigerant. The high-temperature and high-pressure liquid refrigerant is subjected to pressure reduction and expansion by the first-stage throttling device, and the pressure and temperature of the refrigerant are both reduced to become medium-temperature and medium-pressure liquid refrigerant. The medium-temperature and medium-pressure liquid refrigerant enters the flasher to perform gas-liquid separation. The gaseous refrigerant separated by the flasher enters the gas supply port of the compressor to supply gas to the compressor. The liquid refrigerant separated by the flasher enters the second-stage throttling device to expand, and further enters the evaporator to absorb heat and evaporate.

[0042] The refrigeration system of the embodiment of the present application internally embeds the flasher downstream of the condenser in the condenser to utilize the temperature difference between the refrigerant separated by the flasher and the refrigerant entering the condenser to exchange heat and cool the superheated refrigerant of the condenser, that is, to cool the high-temperature and high-pressure gaseous refrigerant just entering the condenser, which is equivalent to pre-treatment, thereby reducing the superheat degree, and further enabling the refrigerant in this part to be fully condensed when reaching the condensation heat exchange pipe 22 to improve the heat exchange efficiency of the condenser.

[0043] In some embodiments, as Figure 2As shown, the refrigerant inlet 21 of the condenser shell 20 is located at the top of the condenser shell 20. The refrigerant outlet 23 of the condenser shell 20 is located at the bottom of the condenser shell 20. The high-temperature and high-pressure gaseous refrigerant enters the condenser shell 20 from the refrigerant inlet 21 and is condensed through the condensation heat exchange tube 22 in the condenser shell 20. Based on this structure, the condenser of the embodiment of the present invention sets the flasher 10 at the upper part of the condenser shell 20. In this way, the gaseous refrigerant entering the condenser shell 20 from the refrigerant inlet 21 at the top of the condenser shell 20 will first pass through the flasher 10, so that the refrigerant before condensation will first be pre-treated and cooled by the flasher 10 to reduce the superheat. In this way, when the gaseous refrigerant reaches the condensation heat exchange tube 22 located at the lower part of the condenser shell 20, it has become a saturated refrigerant, thereby achieving complete condensation, thereby improving the heat exchange efficiency of the condenser.

[0044] Furthermore, while the refrigerant inside the cooling heat exchange tube group 19 of the flasher 10 cools the refrigerant outside the flasher 10, the refrigerant inside the cooling heat exchange tube group 19 also absorbs heat and heats up, thereby further vaporizing the refrigerant inside the cooling heat exchange tube group 19, thereby increasing the dryness of the gaseous refrigerant output by the cooling heat exchange tube group 19 and avoiding liquid hammer when replenishing air to the compressor.

[0045] like Figure 2 As shown, in some embodiments, the flasher 10 is positioned above the condenser housing 20. The condensing heat exchange tube 22 is positioned below the condenser housing 20. As the refrigerant flows from the refrigerant inlet 21 to the refrigerant outlet 23, it passes through the flasher 10 and the condensing heat exchange tube 22, thereby pre-treating the refrigerant before condensation. Furthermore, this placement of the flasher 10 utilizes the internal space of the condenser housing 20, thereby reducing the overall height of the unit.

[0046] In some embodiments, as Figure 2 As shown, the refrigerant outlet 23 of the condenser shell 20 is connected to the liquid inlet of the flasher 10 through a connecting pipe 24 so that the condensed refrigerant flows into the flasher 10 through the connecting pipe 24. Figure 2 As shown, the connecting pipe 24 is a bent pipe to achieve communication between the refrigerant outlet 23 and the liquid inlet of the flasher 10 .

[0047] In some embodiments, as Figure 2 As shown, a first stage throttling device 30 is provided on the connecting pipe 24. After the refrigerant flows out from the refrigerant outlet of the condenser shell 20, it is throttled by the first stage throttling device 30 and then enters the flasher 10 for flashing.

[0048] refer to Figure 2In some embodiments, the condenser housing 20 is a cylindrical housing. From the cross-section, the top space of the condenser housing 20 is relatively small. In order to reasonably arrange the various components of the flasher 10, refer to Figures 3 to 5 In some embodiments, the cooling heat exchange tube group 19 is disposed on the lower side of the flash chamber 11. The cooling heat exchange tube group 19 is disposed on the lower side of the flash chamber 11. This allows the wider area of ​​the condenser shell 20 to be fully utilized to arrange the cooling heat exchange tube group 19, thereby improving the cooling effect of the flash condenser 10 on the refrigerant.

[0049] In some embodiments, the cooling heat exchange tube group 19 includes one heat exchange tube or multiple heat exchange tubes arranged side by side. Figure 5 As shown, in a specific embodiment, the cooling heat exchange tube group 19 includes a plurality of heat exchange tubes arranged side by side. This increases the area of ​​heat exchange of the refrigerant, improves the cooling effect on the refrigerant, and better reduces the superheat of the refrigerant.

[0050] The function of the flash chamber 10 is to separate the refrigerant into gas and liquid by using the flash chamber 11. After the refrigerant is separated into gas and liquid, the gaseous refrigerant rises and the liquid refrigerant settles downward. In order to improve the effect of gas-liquid separation, refer to Figure 5 The flash chamber 11 includes a groove-shaped cavity 112. The sidewalls of the groove-shaped cavity 112 are inclined. In this way, after gas-liquid separation, the refrigerant droplets slide along the inclined sidewalls to the bottom of the groove-shaped cavity 112, which is conducive to the aggregation of the refrigerant droplets.

[0051] In a specific embodiment, the slot-shaped cavity 112 is a triangular cavity.

[0052] In order to make the structure of the flasher 10 more compact and occupy a smaller internal space of the condenser shell, the embodiment of the present application utilizes the triangular gap formed by the inclined side walls of the groove cavity 112. In some embodiments, the cooling heat exchange tube group 19 includes two cooling heat exchange tube groups respectively arranged on the outer sides of the two side walls. Figure 5 In this way, the shapes of the flash chamber 11 and the two cooling heat exchange tube groups are matched, and the structure is compact.

[0053] Specifically, if Figure 5 As shown, the cross-sectional shape of each cooling heat exchange tube group is a triangle.

[0054] As mentioned above, the condenser housing 20 of the embodiment of the present application is a cylindrical housing. As a result, the top space of the condenser housing 20 is relatively small. In some embodiments, the flash chamber 11 includes a top wall 111. The top wall 111 includes a main body section and end sections respectively arranged on both sides of the main body section, and the end sections are arranged obliquely relative to the main body section. Figure 2As shown, the top wall 111 is shaped to fit the top of the condenser shell 20, so that the position of the flash evaporator 10 is closer to the top of the condenser shell 20, so that the high-temperature and high-pressure refrigerant just entering the condenser shell 20 can be cooled by the flash evaporator 10, reducing the superheat. Moreover, the top wall 111 is shaped to fit the top of the condenser shell 20, so that the arrangement of the flash evaporator 10 inside the condenser shell 20 is more compact.

[0055] In some embodiments, the flash evaporator 10 further comprises a gas collection cavity 13. The gas collection cavity 13 is connected to the flash evaporation cavity 11 and the cooling heat exchange tube group 19. The gaseous refrigerant separated by the flash evaporation enters the gas collection cavity 13 from the flash evaporation cavity 11, and then enters the cooling heat exchange tube group 19 from the gas collection cavity 13. That is, the gaseous refrigerant separated by the flash evaporation first flows from the flash evaporation cavity 11 to the gas collection cavity 13, and then flows from the gas collection cavity 13 to the cooling heat exchange tube group 19, so that the flow path of the gaseous refrigerant is increased, and the gaseous refrigerant collides with the wall of the gas collection cavity 13 during the flow, so that the gas-liquid separation effect is further improved. Moreover, the cooling heat exchange tube group 19 is arranged on the lower side of the flash evaporation cavity 11, so that the flow direction of the refrigerant is changed when the refrigerant flows from the flash evaporation cavity 11 to the gas collection cavity 13 and then to the cooling heat exchange tube group 19, improving the gas-liquid separation effect. Moreover, in particular, the flow direction of the refrigerant is changed by 180 degrees during the flow, and the gas-liquid separation effect is better.

[0056] In order to further improve the gas-liquid separation effect, in some embodiments, the flash evaporator 10 further comprises a gas collection baffle arranged in the gas collection cavity 13. Moreover, the flash evaporator 10 further comprises a first liquid outlet pipe 14 arranged at the bottom of the gas collection cavity 13. In this way, the refrigerant is subjected to gravity separation and collision separation in the gas collection cavity 13 by the gas collection baffle. After separation, the liquid refrigerant is collected at the bottom of the gas collection cavity, so that the first liquid outlet pipe 14 is arranged at the bottom thereof to flow back to the evaporator bottom, ensuring a high-efficiency flash evaporation separation efficiency of the refrigerant in the built-in flash evaporator.

[0057] In particular, the gas collection baffle comprises a perforated baffle. The gas collection baffle can also be a baffle plate.

[0058] In other embodiments, the flash evaporator 10 further comprises a filter screen arranged in the gas collection cavity 13 to further improve the separation efficiency.

[0059] In some embodiments, the flash evaporator 10 further comprises a gas outlet cavity 15. The gas outlet cavity 15 is connected to the cooling heat exchange tube group 19, and the gaseous refrigerant separated by the flash evaporation enters the gas outlet cavity 15 after passing through the cooling heat exchange tube group 19. Similarly, the refrigerant after passing through the cooling heat exchange tube group 19 collides with the wall of the gas outlet cavity 15 during the process of entering the gas outlet cavity 15, thereby realizing gas-liquid separation.

[0060] As shown in FIG. 1, the flash evaporator 10 is arranged in the condenser shell 20. The flash evaporator 10 comprises a flash evaporation cavity 11, a cooling heat exchange tube group 19, and a top wall 111. The flash evaporation cavity 11 is arranged in the condenser shell 20. The cooling heat exchange tube group 19 is arranged in the flash evaporation cavity 11. The top wall 111 is arranged on the top of the flash evaporation cavity 11. Figure 6As shown in some embodiments, the flash evaporator 10 further comprises a gas outlet baffle 100 arranged in the gas outlet cavity 15. In this way, the refrigerant in the gas outlet cavity 15 is subjected to gravity separation and collision separation by the gas outlet baffle 100. After the separation, the liquid refrigerant is collected at the bottom of the gas outlet cavity, and thus a second liquid outlet pipe 40 is arranged at the bottom of the gas outlet cavity to return to the evaporator bottom, thereby ensuring a high-efficiency flash separation efficiency of the refrigerant in the flash evaporator.

[0061] As shown in some embodiments, Figure 3 and Figure 4 The flash evaporator 10 further comprises a gas collection cavity 13 and a gas outlet cavity 15 arranged at both ends of the flash cavity 11. The gas collection cavity 13 comprises a gas collection port in communication with the gas outlet port of the flash cavity 11 and a first heat exchange pipe connection port in communication with the cooling heat exchange pipe group 19, and the gas outlet cavity 15 comprises a second heat exchange pipe connection port in communication with the cooling heat exchange pipe group 19. Through the arrangement of the gas outlet cavity 15 and the gas collection cavity 13, the separation efficiency of the flash evaporator 10 is improved.

[0062] In some embodiments, the flash evaporator 10 further comprises a liquid blocking plate 12 arranged in the flash cavity 11.

[0063] The structure of the condenser of one specific embodiment of the present application will be described in detail below. Figures 1 to 6

[0064] As shown in some embodiments, Figure 1 and Figure 2 The condenser comprises a condenser shell 20, a condensing heat exchange pipe 22, a flash evaporator 10, a communication pipe 24, and a first-stage throttling device 30.

[0065] The condenser shell 20 comprises a refrigerant inlet 21 and a refrigerant outlet 23. The high-temperature and high-pressure gaseous refrigerant enters the condenser shell 20 from the refrigerant inlet 21 and is condensed by the condensing heat exchange pipe 22 in the condenser shell 20. The flash evaporator 10 is arranged at the upper part of the condenser shell 20. In this way, the gaseous refrigerant entering the condenser shell 20 from the refrigerant inlet 21 at the top of the condenser shell 20 will first pass through the flash evaporator 10, so that the refrigerant before condensation is first subjected to pre-treatment cooling by the flash evaporator 10 to reduce the superheat. Thus, when the gaseous refrigerant reaches the condensing heat exchange pipe 22 located at the lower part of the condenser shell 20, it has become saturated refrigerant, thereby achieving complete condensation and improving the heat exchange efficiency of the condenser.

[0066] As shown in some embodiments, Figures 3 to 5 The flash evaporator 10 comprises a flash cavity 11, a gas collection cavity 13, a cooling heat exchange pipe group 19, and a gas outlet cavity 15. The top of the flash cavity 11 is connected with a liquid inlet pipe 17. The bottom of the flash cavity 11 is connected with a first liquid outlet pipe 14. The inside of the flash cavity 11 is provided with a plurality of liquid blocking plates 12 arranged at intervals in the flow direction of the refrigerant. The liquid blocking plate 12 is a perforated plate.

[0067] As​Figure 4 As shown, the flasher 10 further comprises a filter screen 18. The refrigerant is further subjected to gas-liquid separation by the filter screen 18.

[0068] As shown, in the flash chamber 11, the gaseous refrigerant G is located at the upper side and the liquid refrigerant L is located at the lower side, thereby realizing gas-liquid separation. The bottom of the flash chamber 11 is connected with the first liquid outlet pipe 14 so as to output the liquid refrigerant gathered at the bottom of the flash chamber 11 through the first liquid outlet pipe 14. Figure 1 The gas collection chamber 13 comprises a first gas collection side plate 133, an arc-shaped gas collection top plate 131, a gas collection bottom plate 132 and a second gas collection side plate 134. The first gas collection side plate 133 and the second gas collection side plate 134 are oppositely arranged. The first gas collection side plate 133, the second gas collection side plate 134, the arc-shaped gas collection top plate and the gas collection bottom plate 132 form the gas collection chamber 13. The first gas collection side plate 133 is provided with a communication port communicating with the flash chamber 11 and a plurality of first heat exchange pipe connection ports arranged at both sides of the communication port. The gaseous refrigerant separated by the flash chamber 11 enters the gas collection chamber 13 through the communication port and then enters the cooling heat exchange pipe group 19 through the plurality of first heat exchange pipe connection ports. The shape of the communication port matches the shape of the end surface of the flash chamber 11.

[0069] The top of the gas collection chamber 13 of the embodiment is in an arc-shaped structure, which matches the shape of the condenser shell 20, thereby fully utilizing the internal space of the gas collection chamber 13 and making the structure of the condenser more compact.

[0070] The gas outlet chamber 15 comprises a first gas outlet side plate 154, an arc-shaped gas outlet top plate 151, a second gas outlet side plate 153 and a gas outlet bottom plate 152. The first gas outlet side plate 154, the arc-shaped gas outlet top plate 151, the second gas outlet side plate 153 and the gas outlet bottom plate 152 form the gas outlet chamber 15. The first gas outlet side plate 154 is provided with a plurality of second heat exchange pipe connection ports connected with the cooling heat exchange pipe group 19. The first gas outlet side plate 154 is in closed connection with the flash chamber 11. That is, the first gas outlet side plate 154 is in sealed connection with the end surface of the groove-shaped chamber 112 of the flash chamber 11. In this way, the first gas outlet side plate 154 forms the side wall of the gas outlet chamber 15 and also forms the end surface wall of the flash chamber 11, thereby making the structure of the flasher simple and reducing the weight.

[0071] The top end of the gas outlet chamber 15 is provided with the gas outlet pipe 16. The gaseous refrigerant separated from the liquid refrigerant returns to the air supplement port of the compressor through the gas outlet pipe 16.

[0072]

[0073] ​The mixed-state refrigerant is separated by large space gravity separation, collision separation and filter screen adsorption separation in the flash chamber 11. The separated liquid-state refrigerant L is collected at the bottom of the flash chamber 11 and enters the next stage throttling device through the first liquid outlet pipe 14. The separated gas-state refrigerant G is collected at the top of the flash chamber 11 and then enters the gas collection chamber 13, the cooling heat exchange pipe group 19 and the gas outlet chamber 15. Finally, the gas-state refrigerant G enters the air supplement port of the compressor through the gas outlet pipe 16.

[0074] As shown in the figure, the cooling heat exchange pipe group 19 connects the gas collection chamber 13 and the gas outlet chamber 15, forming an integrated refrigerant gas channel. All the separated gas-state refrigerant enters the gas collection chamber 13 and then enters the gas outlet chamber 15 through the cooling heat exchange pipe group 19. Finally, the gas-state refrigerant enters the compressor through the gas outlet pipe 16, realizing intermediate air supplement. Figure 5

[0075] The inner cavity of the condenser shell 20 can be divided into a superheating zone, a condensing zone and a subcooling zone from top to bottom according to different heat exchange phase changes. The high-temperature and high-pressure gas-state superheated refrigerant entering from the top of the condenser directly enters the flash chamber 11 of the flash evaporator 10 to avoid directly washing the condensing heat exchange pipe 22. The gas-state refrigerant is folded to both sides in the flash chamber 11 and then sequentially passes through the cooling heat exchange pipe group 19, the condensing heat exchange pipe 22 and the subcooling pipe for heat exchange. Since there is a certain temperature difference between the cooling heat exchange pipe group 19 and the inner space of the condenser shell, the superheat degree of the gas-state refrigerant in the superheating zone of the condenser is greatly reduced, ensuring that the gas-state refrigerant from the superheating zone to the condensing zone reaches a saturated state, and ensuring the high efficiency of the condensing zone heat exchange. At the same time, the heat exchange of the mixed-state refrigerant in the cooling heat exchange pipe group 19 due to the temperature difference is further separated or evaporated, improving the dryness of the gas-state refrigerant and avoiding the phenomenon of liquid suction when supplementing air to the compressor.

[0076] Finally, it should be noted that the above examples are used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application.​

Claims

1. A condenser, characterized in that: include: A condenser shell (20) having a refrigerant inlet and a refrigerant outlet; A condensation heat exchange tube (22) is arranged in the condenser shell (20), and a refrigerant enters the condenser shell (20) from the refrigerant inlet to be condensed through the condensation heat exchange tube (22) and flows out through the refrigerant outlet; A flasher (10) is arranged in the condenser shell (20) and located above the condensing heat exchange tube (22), the flasher (10) comprising a flash chamber (11) and a cooling heat exchange tube group (19), the flash chamber (11) having a liquid inlet, a liquid outlet and an air outlet, the liquid inlet of the flash chamber (11) being connected to the refrigerant outlet so that the refrigerant is separated into gas and liquid in the flash chamber (11), and the cooling heat exchange tube group (19) being connected to the air outlet of the flash chamber (11).

2. The condenser according to claim 1, characterized in that The cooling heat exchange tube group (19) is arranged on the lower side of the flash chamber (11).

3. The condenser according to claim 2, characterized in that The cooling heat exchange tube group (19) includes one heat exchange tube or a plurality of heat exchange tubes arranged side by side.

4. The condenser according to claim 1, characterized in that The flash cavity (11) comprises a groove-shaped cavity (112), and the side wall of the groove-shaped cavity (112) is arranged at an inclination.

5. The condenser according to claim 4, characterized in that The cooling heat exchange tube group (19) comprises two cooling heat exchange subgroups respectively arranged on the outside of the side walls of the groove-shaped cavity (112).

6. The condenser according to claim 1, characterized in that The flash cavity (11) comprises a top wall (111), the top wall (111) comprising a main body section and end sections respectively arranged on both sides of the main body section, the end sections being arranged obliquely relative to the main body section.

7. The condenser according to claim 1, characterized in that The flasher (10) further comprises an air collecting chamber (13), wherein the air collecting chamber (13) is connected to the flash chamber (11) and the cooling heat exchange tube group (19), and the gaseous refrigerant separated by flashing enters the flash chamber (11) into the air collecting chamber (13), and then enters the cooling heat exchange tube group (19) from the air collecting chamber (13).

8. The condenser according to claim 7, characterized in that The flasher (10) further comprises a gas collecting baffle plate arranged in the gas collecting cavity (13).

9. The condenser according to claim 1, characterized in that The flasher (10) further comprises an air outlet cavity (15), wherein the air outlet cavity (15) is connected to the cooling heat exchange tube group (19), and the gaseous refrigerant separated by flashing passes through the cooling heat exchange tube group (19) and then enters the air outlet cavity (15).

10. The condenser according to claim 9, characterized in that The flasher (10) further comprises an air outlet baffle disposed in the air outlet cavity (15).

11. The condenser according to claim 1, characterized in that The flasher (10) further comprises an air collecting chamber (13) and an air outlet chamber (15) arranged at both ends of the flash chamber (11); the air collecting chamber (13) comprises an air collecting port communicating with the air outlet of the flash chamber (11) and a first heat exchange pipe connection port communicating with the cooling heat exchange pipe group (19); and the air outlet chamber (15) comprises a second heat exchange pipe connection port communicating with the cooling heat exchange pipe group (19).

12. The condenser according to claim 1, characterized in that The flash device (10) further comprises a liquid baffle (12) arranged in the flash chamber (11).

13. A refrigeration system, characterized in that: The invention comprises a compressor, an evaporator and a condenser as claimed in any one of claims 1 to 12, wherein the exhaust port of the compressor is connected to the refrigerant inlet of the condenser shell, the air outlet of the flash chamber (11) is connected to the air supply port of the compressor, and the liquid outlet of the flash chamber (11) is connected to the evaporator.

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