Condenser and air conditioner

Abstract

The present invention relates to the field of air conditioning, and in particular to a condenser and an air conditioner. The condenser of the present invention comprises: a shell, wherein the two ends of the shell along the first direction are respectively provided with a refrigerant inlet and a refrigerant outlet; a heat exchange device, which is arranged in the shell and comprises a heat exchange tube, wherein the heat exchange tube is used to pass a cooling medium; and a supercooling device, which is arranged in the shell and is located on a side of the heat exchange device close to the refrigerant outlet, and the supercooling device comprises a flash supercooling device and a baffle supercooling device, and the flash supercooling device and the baffle supercooling device are sequentially arranged along the direction from the refrigerant inlet to the refrigerant outlet. Based on this, the supercooling degree of the condenser can be effectively improved.

Description

Technical Field

[0001] The invention relates to the field of air conditioners, and in particular to a condenser and an air conditioner. Background Art

[0002] Setting a subcooling device in the condenser is an effective means to improve the performance of the air conditioning unit. The basic principle is: the saturated liquid refrigerant produced by condensation exchanges heat with the heat exchange tube (commonly known as the subcooling tube) again at the subcooling device, and the temperature of the liquid refrigerant is taken away by the cooling medium in the subcooling tube, thereby reducing the temperature of the refrigerant to reduce the enthalpy value before the refrigerant enters the evaporator, improve the energy efficiency ratio of the air conditioning system, and save energy. Among them, the temperature reduced by the refrigerant is called the subcooling degree.

[0003] Commonly used supercooling devices are classified into different types such as immersion type, baffle type and flash type. In the related art, immersion type, baffle type and flash type supercooling devices are generally used separately.

[0004] Among them, the immersion subcooling device reduces the refrigerant temperature by directly immersing the subcooling tube in the liquid refrigerant produced by condensation. However, since the subcooling tube is directly immersed in the refrigerant, there is no obvious flow of fluid outside the tube, resulting in poor heat exchange effect and low subcooling degree.

[0005] The baffled subcooling device adds baffles to the immersion subcooling device, and uses the baffles to enhance the turbulence intensity of the flow outside the subcooling tube to strengthen the non-phase change convection heat transfer. Although the baffled subcooling device can increase the velocity of the skimming flow outside the subcooling tube, in order to obtain a larger degree of subcooling, it will cause the fluid pressure drop to drop too much, and the refrigerant may flash. Among them, flash refers to the phenomenon that the liquid refrigerant turns into a gaseous refrigerant due to a sudden decrease in pressure.

[0006] The flash subcooling device allows the saturated refrigerant to flow through a cavity with a large cross-sectional area change, reducing the refrigerant pressure, causing part of the liquid refrigerant to evaporate into gas, and the temperature of the remaining liquid refrigerant to decrease. The gaseous refrigerant then exchanges heat with the subcooling pipe and condenses into a refrigerant with a lower temperature. The flash subcooling device can achieve a high degree of subcooling, but the structure of the flash subcooling device in the related technology is relatively complex and difficult to control, and when the flash pressure is too low, the gaseous refrigerant will no longer be able to condense.

[0007] It can be seen that the supercooling device in the related art is a single-type supercooling device, which has problems such as small supercooling degree and large pressure drop. Summary of the invention

[0008] A technical problem to be solved by the present invention is to improve the subcooling degree of the condenser.

[0009] In order to solve the above problems, the present invention provides a condenser, which comprises:

[0010] A shell, wherein two ends of the shell along a first direction are respectively provided with a refrigerant inlet and a refrigerant outlet;

[0011] a heat exchange device, disposed in the housing and comprising a heat exchange tube, wherein the heat exchange tube is used to pass a cooling medium; and

[0012] A subcooling device is arranged in the housing and located on a side of the heat exchange device close to the refrigerant outlet, and the subcooling device includes a flash subcooling device and a baffle subcooling device, and the flash subcooling device and the baffle subcooling device are arranged in sequence along the direction from the refrigerant inlet to the refrigerant outlet;

[0013] The refrigerant flowing into the shell from the refrigerant inlet flows through the heat exchange device, the flash subcooling device and the baffle subcooling device in sequence, and flows out from the refrigerant outlet.

[0014] In some embodiments, the flash subcooling device includes a flash orifice plate and a first subcooling tube. The flash orifice plate includes a plate body and a flash hole. The flash hole is arranged on the plate body, and the aperture decreases along the direction from the refrigerant inlet to the refrigerant outlet. The first subcooling tube is arranged on the side of the flash orifice plate close to the refrigerant outlet, and the first subcooling tube is used to pass the cooling medium.

[0015] In some embodiments, the flash aperture plate is configured as at least one of the following:

[0016] Maximum aperture of flash hole With minimum aperture The ratio is 2-8;

[0017] Maximum aperture of flash hole 4-10mm;

[0018] The thickness H of the plate is the maximum diameter of the flash hole 0.2-0.5 times;

[0019] At least two flash holes are provided on the plate body;

[0020] The board body is a straight board or a non-straight board.

[0021] In some embodiments, the plate body is a V-shaped plate.

[0022] In some embodiments, the plate body includes a first plate portion and a second plate portion, the first plate portion and the second plate portion are connected to form a V-shape, and an angle θ between the first plate portion and the second plate portion is 150°-175°.

[0023] In some embodiments, the outer diameter of the first subcooling tube is the same as that of the heat exchange tube, or the outer diameter of the first subcooling tube is smaller than the outer diameter of the heat exchange tube.

[0024] In some embodiments, the outer diameter of the first subcooling tube is 15-19 mm, and the outer diameter of the heat exchange tube is 19-30 mm.

[0025] In some embodiments, the baffled subcooling device includes a second subcooling tube and a plurality of baffles, the plurality of baffles are arranged at intervals along the length direction of the second subcooling tube, and two adjacent baffles are staggered in the first direction, the second subcooling tube passes through the plurality of baffles, and the second subcooling tube is used to pass a cooling medium.

[0026] In some embodiments, the outer diameter of the second subcooling tube is the same as the outer diameter of the first subcooling tube.

[0027] In some embodiments, the subcooling device also includes a baffle, which is arranged between the flash subcooling device and the refractory subcooling device, and the condenser has two flow ports located on both sides of the baffle along the length direction of the heat exchange tube, and the two flow ports connect the flash subcooling device and the refractory subcooling device.

[0028] In some embodiments, the two flow ports are arranged symmetrically about the refrigerant outlet.

[0029] In some embodiments, the two flow ports are located between the baffle and the first tube sheet and the second tube sheet of the condenser.

[0030] In some embodiments, in the first direction, the distance between the supercooling device and the refrigerant outlet is smaller than the distance between the supercooling device and the refrigerant inlet.

[0031] In some embodiments, the condenser is a horizontal condenser, and the first direction is a vertical direction.

[0032] The present invention also provides an air conditioner, which comprises the condenser of the present invention.

[0033] By arranging a composite subcooling device with upper flash subcooling and lower baffle subcooling in the condenser, the subcooling degree of the condenser can be effectively improved.

[0034] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] Figure 1 It is a longitudinal cross-sectional view of a condenser in some embodiments of the present invention.

[0037] Figure 2 for Figure 1 Longitudinal cross-sectional view of the flash hole plate.

[0038] Figure 3 for Figure 2 A top view of the flash aperture plate is shown.

[0039] Figure 4 1 is a top view of a flash hole plate in some other embodiments of the present invention.

[0040] Figure 5 1 is a longitudinal cross-sectional view of a flash hole plate in some other embodiments of the present invention.

[0041] In the figure:

[0042] 10. Condenser;

[0043] 1. Shell; 11. Shell; 12. First end cover; 13. Second end cover; 14. First chamber; 15. Second chamber; 16. Third chamber; 17. First cavity; 18. Second cavity; 1a. Cooling medium inlet; 1b. Cooling medium outlet; 1c. Refrigerant inlet; 1d. Refrigerant outlet;

[0044] 21. first tube sheet; 22. second tube sheet; 23. partition plate;

[0045] 3. Heat exchange device; 31. Heat exchange tube;

[0046] 4. Subcooling device; 4a. Flash subcooling device; 4b. Baffle subcooling device; 41. Flash hole plate; 411. Plate body; 412. Flash hole; 413. First plate portion; 414. Second plate portion; 42. First subcooling tube; 43. Baffle; 44. Second subcooling tube; 45. Baffle; 46. Flow port. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of the present invention.

[0048] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0049] In the description of the present invention, it should be understood that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0050] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0051] Figure 1-Figure 5 The structure of the condenser of the present invention is shown exemplarily.

[0052] The condenser is an important part of the air conditioner. When working, the refrigerant is compressed into high-temperature and high-pressure gas by the air conditioner's compressor and enters the condenser. The condenser uses air cooling or water cooling to cool the refrigerant and liquefy it. The liquefied refrigerant flows out of the condenser, passes through the throttle valve of the air conditioner, and enters the evaporator of the air conditioner to evaporate and cool, and then is sucked away by the compressor, completing a refrigeration cycle.

[0053] The heat exchange efficiency of the condenser directly affects the energy efficiency ratio of the air conditioning unit. How to improve the heat exchange efficiency of the condenser to improve the energy efficiency ratio of the air conditioning unit and save energy is an important issue.

[0054] Figure 1 A structure of a condenser is shown.

[0055] For the convenience of description, the relative arrangement direction of the refrigerant inlet 1c and the refrigerant outlet 1d is referred to as the first direction, the relative arrangement direction of the first tube sheet 21 and the second tube sheet 22 is referred to as the second direction, and the direction perpendicular to both the first direction and the second direction is referred to as the third direction. Generally, the first direction is perpendicular to the second direction. When the condenser is a horizontal condenser widely used in commercial air conditioners, etc., the first direction specifically refers to the up and down direction, which is also the height direction of the shell 1; the second direction specifically refers to the first horizontal direction, which is also the length direction of the shell 1, the heat exchange tube 31 and the supercooling tube; the third direction specifically refers to the second horizontal direction perpendicular to the height direction and the first horizontal direction, which is also the width direction of the shell 1. In addition, when the condenser is a horizontal condenser, the direction where the refrigerant inlet 1c is located is the top, and the direction where the refrigerant outlet 1d is located is the bottom.

[0056] Reference Figure 1 In some embodiments, the condenser 10 is a shell and tube condenser, which includes a shell 1, a first tube sheet 21, a second tube sheet 22, a partition 23 and a heat exchange device 3, etc.

[0057] The housing 1 includes a shell 11, a first end cover 12, a second end cover 13, etc. The first end cover 12 and the second end cover 13 are connected to the opposite ends of the shell 11, so that the shell 11, the first end cover 12 and the second end cover 13 together form a chamber inside the shell 1. Among them, when the condenser 10 is a horizontal condenser, the shell 11 is roughly arranged horizontally. For example, in some embodiments, the shell 11 is constructed as a rotating body structure such as a cylinder, which is hollow inside, open at both axial ends, and the center line of rotation is arranged horizontally. Specifically, Figure 1 The rotation centerline of the housing 11 extends in the left-right direction. The first end cover 12 and the second end cover 13 are connected to the open ends of the housing 11 to close the openings at both ends of the housing 11. Figure 1 In the embodiment, the first end cover 12 and the second end cover 13 are respectively connected to the right end and the left end of the housing 11. Moreover, the surfaces of the first end cover 12 and the second end cover 13 are convex arc-shaped.

[0058] The first tube sheet 21 and the second tube sheet 22 are disposed inside the shell 1 to separate the chamber inside the shell 1. Specifically, the first tube sheet 21 and the second tube sheet 22 are spaced apart along the second direction to separate the chamber into three parts, namely, the first chamber 14 located on the side of the first tube sheet 21 away from the second tube sheet 22, the second chamber 15 located on the side of the second tube sheet 22 away from the first tube sheet 21, and the third chamber 16 located between the first tube sheet 21 and the second tube sheet 22. More specifically, the first tube sheet 21 and the second tube sheet 22 are respectively disposed at both ends of the shell 11 along the second direction (at Figure 1 In this case, the first chamber 14 is located between the first tube sheet 21 and the first end cover 12, and is enclosed by the first tube sheet 21 and the first end cover 12. The second chamber 15 is located between the second tube sheet 22 and the second end cover 13, and is enclosed by the second tube sheet 22 and the second end cover 13. The third chamber 16 is located between the first tube sheet 21, the second tube sheet 22 and the shell 11, and is enclosed by the first tube sheet 21, the second tube sheet 22 and the shell 11.

[0059] The shell 1 is provided with a cooling medium inlet 1a, a cooling medium outlet 1b, a refrigerant inlet 1c and a refrigerant outlet 1d. The cooling medium inlet 1a and the cooling medium outlet 1b are arranged on the first end cover 12, connected to the first chamber 14, and are respectively used for the cooling medium (such as cooling water) to flow in and out. The refrigerant inlet 1c and the refrigerant outlet 1d are arranged at both ends of the shell 1 along the first direction, connected to the third chamber 16, and are respectively used for the refrigerant to flow in and out. Specifically, when the condenser 10 is a horizontal condenser, the cooling medium inlet 1a and the cooling medium outlet 1b are arranged on the first end cover 12 from bottom to top, and are respectively located on the lower side and the upper side of the rotation center line of the shell 1. The refrigerant inlet 1c and the refrigerant outlet 1d are respectively arranged at the top and the bottom of the shell 11, and are respectively located in the middle of the shell 11 along the second direction. The two are arranged vertically opposite to each other, so that the refrigerant can flow under the action of gravity.

[0060] The partition plate 23 is disposed in the first chamber 14 and partitions the first chamber 14. Specifically, Figure 1 As shown, in some embodiments, the partition 23 is obliquely disposed in the first chamber 14, and its two ends are respectively in contact with the first end cover 12 and the first tube sheet 21. In this way, the partition 23 divides the first chamber 14 into a first chamber 17 connected to the cooling medium inlet 1a and a second chamber 18 connected to the cooling medium outlet 1b, so that the condenser 10 has two tube passes. Figure 1 As shown, when the condenser 10 is a horizontal condenser, the first chamber 17 is located below the second chamber 18 , and the second chamber 18 is located above the first chamber 17 .

[0061] The heat exchange device 3 is arranged in the shell 1, and is used to perform heat exchange with the refrigerant entering the shell 1 from the refrigerant inlet 1c, so that the refrigerant condenses. Specifically, the heat exchange device 3 is arranged in the third chamber 16, and includes a heat exchange tube 31, and the heat exchange tube 31 is used to pass the cooling medium. The length direction of the heat exchange tube 31 is along the second direction, and the two ends pass through the first tube sheet 21 and the second tube sheet 22 respectively, and are connected with the first chamber 14 and the second chamber 15. In this way, the cooling medium flowing into the shell 1 from the cooling medium inlet 1a can flow into the heat exchange tube 31, and then can perform heat exchange at the heat exchange tube 31 with the gaseous refrigerant flowing in from the refrigerant inlet 1c and flowing through the outside of the heat exchange tube 31, so as to condense the gaseous refrigerant into liquid.

[0062] The number of heat exchange tubes 31 is not limited. For example, in some embodiments, the heat exchange device 3 includes multiple (in Figure 1 Specifically, there are 5 heat exchange tubes 31, and these multiple heat exchange tubes 31 are arranged at intervals along the first direction so that the heat exchange device 3 can more fully exchange heat with the gaseous refrigerant.

[0063] During operation, the cooling medium flows from the cooling medium inlet 1a into the first cavity 17, flows into the heat exchange tube 31 and the second chamber 15, then enters the second cavity 18, and finally flows out from the cooling medium outlet 1b. In this process, when flowing through the heat exchange tube 31, it exchanges heat with the gaseous refrigerant flowing into the shell 1 from the refrigerant inlet 1c, absorbs the heat of the gaseous refrigerant, and condenses the gaseous refrigerant into liquid refrigerant.

[0064] In order to improve the heat exchange efficiency of the condenser 10 and further reduce the temperature of the refrigerant, a supercooling device can be provided in the shell 1, and the supercooling device is used to further exchange heat with the refrigerant after heat exchange with the heat exchange device 3 to further reduce the temperature of the refrigerant.

[0065] However, as mentioned above, in the related art, the subcooling device is generally a single-type subcooling device, which only uses one of the immersion subcooling, baffle subcooling and flash subcooling methods to reduce the refrigerant temperature, and has problems such as low subcooling degree and large refrigerant pressure drop.

[0066] In view of the above situation, the present invention improves the structure of the subcooling device and transforms the subcooling device 4 into a composite subcooling device to increase the degree of subcooling and reduce the refrigerant pressure drop, thereby improving the heat exchange efficiency of the condenser 10, improving the energy efficiency ratio of the air conditioner, and saving energy.

[0067] Next, we will mainly combine Figure 1-5 The structure of the supercooling device in each embodiment of the present invention is described.

[0068] Reference Figure 1 In some embodiments, the subcooling device 4 is disposed in the housing 1 and is located on the side of the heat exchange device 3 close to the refrigerant outlet 1d, and the subcooling device 4 includes a flash subcooling device 4a and a baffle subcooling device 4b, and the flash subcooling device 4a and the baffle subcooling device 4b are arranged in sequence along the direction from the refrigerant inlet 1c to the refrigerant outlet 1d. Specifically, the subcooling device 4 is disposed in the third chamber 16, and when the condenser 10 is a horizontal condenser, the subcooling device 4 is located below the heat exchange device 3, and the flash subcooling device 4a and the baffle subcooling device 4b are arranged in sequence from top to bottom.

[0069] Based on the above arrangement, the supercooling device 4 becomes a composite supercooling device that combines a flash supercooling method with a baffle supercooling method, and it cools down the refrigerant by first flash supercooling and then baffle supercooling.

[0070] During operation, the refrigerant flowing into the housing 1 from the refrigerant inlet 1c flows through the heat exchange device 3, the flash subcooling device 4a and the baffle subcooling device 4b in sequence, and flows out from the refrigerant outlet 1d. Specifically, the superheated refrigerant enters the third chamber 16 from the refrigerant inlet 1c, first encounters the colder heat exchange tube 31 with the cooling medium passing through it, and condenses into a liquid with a higher temperature. Then, the saturated liquid refrigerant passes through the flash subcooling device 4a, and part of the liquid refrigerant first flashes into a gaseous refrigerant with a lower temperature, and then encounters cold and condenses into a liquid refrigerant, and flows to the baffle subcooling device 4b together with other liquid refrigerants that have not flashed, and is baffled and subcooled, so that the refrigerant temperature is further reduced, and then flows out from the refrigerant outlet 1d.

[0071] In the above process, the flash subcooling device 4a performs subcooling heat exchange with the refrigerant before the baffle subcooling device 4b. The flow rate of the refrigerant flowing into the flash subcooling device 4 is relatively small, and the refrigerant pressure drop is relatively moderate, so that the gaseous refrigerant generated by the flash can be completely condensed, and the refrigerant pressure drop is relatively small.

[0072] At the same time, the baffle subcooling device 4b performs subcooling heat exchange with the refrigerant after the flash subcooling device 4a. Since the flow rate of the refrigerant has been reduced after passing through the flash subcooling device 4a, compared with the situation where the refrigerant does not pass through the flash subcooling device 4a but directly flows into the baffle subcooling device 4b, the flow rate of the refrigerant flowing through the baffle subcooling device 4b is lower, which is beneficial to reducing the refrigerant pressure drop, reducing energy loss, and preventing the refrigerant from flashing due to excessive pressure drop.

[0073] Moreover, the flash subcooling process is phase change heat transfer, and the baffle subcooling process is non-phase change heat transfer. Phase change heat transfer has a greater heat transfer intensity than non-phase change heat transfer. Therefore, the flash subcooling device 4a is arranged upstream of the baffle subcooling device 4b. The refrigerant can first reach a higher degree of subcooling in the flash subcooling device 4a, and then enter the baffle subcooling device 4b, so as to further improve the degree of subcooling through non-phase change convection heat transfer.

[0074] It can be seen that the subcooling device 4 is set as a composite subcooling device that first flashes and then baffles the subcooling, so that the subcooling device 4 can perform two-stage subcooling on the refrigerant, and can give full play to the characteristics of the flash subcooling method and the baffle subcooling method, and make the two complement each other, take advantage of their strengths and avoid their weaknesses, and achieve a more sufficient and efficient heat exchange process, while effectively improving the refrigerant supercooling degree, it also effectively reduces the refrigerant pressure drop. In this case, the supercooling effect of the subcooling device 4 is not just a simple superposition of the effects of the flash subcooling device 4a and the baffle subcooling device 4b, but is better than the effect of the simple superposition of the flash subcooling device 4a and the baffle subcooling device 4b.

[0075] Among them, refer to Figure 1In some embodiments, in the first direction, the distance between the supercooling device 4 and the refrigerant outlet 1d is smaller than the distance between the supercooling device 4 and the refrigerant inlet 1c. Specifically, when the condenser 10 is a horizontal condenser, the supercooling device 4 is located at the lower part of the shell 1. In this way, the supercooling device 4 can exchange heat with the refrigerant after the refrigerant and the heat exchange device 3 have fully exchanged heat, and the heat exchange effect is better.

[0076] Combined with Figure 1-3 In some embodiments, the flash subcooling device 4a includes a flash orifice plate 41 and a first subcooling tube 42. The flash orifice plate 41 includes a plate body 411 and a flash hole 412. The flash hole 412 is arranged on the plate body 411, and the aperture decreases along the direction from the refrigerant inlet 1c to the refrigerant outlet 1d. The first subcooling tube 42 is arranged on a side of the flash orifice plate 41 close to the refrigerant outlet 1d, and the first subcooling tube 42 is used to pass the cooling medium.

[0077] The flash hole 412 may be a tapered hole. The number of the first supercooling tubes 42 may be one, two or more. Figure 1 In the illustrated embodiment, the flash subcooling device 4 a includes two first subcooling tubes 42 .

[0078] Specifically, the flash orifice plate 41 is disposed on one side of the heat exchange device 3 close to the refrigerant outlet 1d, and its length direction is substantially along the second direction, and its two ends are respectively connected to the first tube sheet 21 and the second tube sheet 22, and supported by the first tube sheet 21 and the second tube sheet 22. The length direction of the first subcooling tube 42 is substantially along the second direction, and its two ends respectively pass through the first tube sheet 21 and the second tube sheet 22, and communicate with the first chamber 14 and the second chamber 15.

[0079] When the condenser 10 is a horizontal condenser, the length directions of the flash orifice plate 41 and the first subcooling tube 42 are substantially along the horizontal direction (in Figure 1 The heat exchange device 3, the flash orifice plate 41 and the first supercooling tube 42 are arranged in sequence from top to bottom.

[0080] Based on the above arrangement, the liquid refrigerant with a higher temperature obtained after passing through the heat exchange device 3 first flows to the flash hole plate 41, and then flows to the first supercooling tube 42 through the flash hole 412 on the flash hole plate 41. When flowing through the flash hole 412, since the aperture of the flash hole 412 gradually decreases, the cross-sectional area gradually decreases, and therefore, a pressure drop is generated, part of the liquid refrigerant flashes into a gaseous refrigerant with a lower temperature, and the temperature of the remaining liquid refrigerant also decreases, so that the refrigerant becomes a saturated gas-liquid two-phase refrigerant with a lower temperature. When flowing through the first supercooling tube 42, the gaseous refrigerant in the saturated gas-liquid two-phase refrigerant exchanges heat with the cooling medium in the first supercooling tube 42, condenses into a liquid refrigerant with a lower temperature, and flows to the folding supercooling device 4b together with the remaining liquid refrigerant after flashing.

[0081] Among them, although the flash orifice plate 41 can also be replaced by other structures such as a nozzle, the advantage of using the flash orifice plate 41 is that the structure is simpler and the control is more convenient. The flash pressure of the refrigerant can be easily controlled without the cooperation of special structures such as an electronic expansion valve or a float valve.

[0082] Reference Figure 2 and Figure 3 In some embodiments, the maximum aperture of the flash hole 412 is With minimum aperture The ratio is 2-8. The maximum aperture of the flash hole 412 The specific value can be determined according to the heat exchange amount of the condenser 10.

[0083] Continue to refer to Figure 3 In some embodiments, the number of the flash hole 412 is one, and the central axis is aligned with the central axis of the refrigerant inlet 1c and the refrigerant outlet 1d in the second direction. However, the arrangement of the flash hole 412 is not limited to this. For example, as a variation, Figure 4 As shown, the number of flash holes 412 may also be at least two. Figure 4 When at least two flash holes 412 are provided on the plate body 411 , the at least two flash holes 412 may be arranged at intervals along a third direction, that is, arranged at intervals along a width direction of the plate body 411 .

[0084] Reference Figure 2 and Figure 3 In some embodiments, the thickness H of the plate 411 is equal to the maximum aperture of the flash hole 412. At the same time, combined with Figure 1 and Figure 3 , the length L of the plate body 411 is equal to the distance between the first tube sheet 21 and the second tube sheet 22.

[0085] The plate body 411 may be a straight plate (eg Figure 2 As shown), or the plate body 411 may also be a non-straight plate to enhance the guiding effect on the liquid refrigerant. Figure 5 In some embodiments, the plate body 411 is a V-shaped plate, which includes a first plate portion 413 and a second plate portion 414 , and the first plate portion 413 and the second plate portion 414 are bent relative to each other and connected in a V shape. At this time, the flash hole 412 can be arranged at the bend of the plate body 411 .

[0086] The V-shaped plate 411 can guide the liquid refrigerant falling from the heat exchange device 3 to converge at the flash hole 412, thereby facilitating the improvement of the flash efficiency and the improvement of the flash subcooling degree.

[0087] The angle θ between the first plate portion 413 and the second plate portion 414 may be 150°-175°.

[0088] In addition, refer to Figure 1 In some embodiments, the baffled supercooling device 4b includes a second supercooling tube 44 and a plurality of baffles 45. The plurality of baffles 45 are arranged at intervals along the length direction of the second supercooling tube 44, and two adjacent baffles 45 are arranged alternately in the first direction. The second supercooling tube 44 passes through the plurality of baffles 45, and the second supercooling tube 44 is used to pass the cooling medium.

[0089] Specifically, refer to Figure 1 The length direction of the second subcooling tube 44 is along the second direction, and the two ends thereof pass through the first tube sheet 21 and the second tube sheet 22 respectively, and are connected with the first chamber 14 and the second chamber 15. A plurality of baffles 45 are supported between the two ends of the second subcooling tube 44 at intervals from each other. In other words, the baffles 45 are provided with through holes, and the second subcooling tube 44 passes through the through holes of each baffle 45. Two adjacent baffles 45 are staggered in the first direction, or in other words, the projections of two adjacent baffles 45 in the second direction partially overlap.

[0090] When the condenser 10 is a horizontal condenser, the length direction of the second subcooling tube 44 is along the horizontal direction (in Figure 1 The baffles 45 are arranged in a vertically staggered manner with respect to each other.

[0091] The number of the second subcooling tubes 44 may be one, two or more. Figure 1 In the illustrated embodiment, the number of the second subcooling tubes 44 is three.

[0092] Based on the above arrangement, a baffle channel is formed between the multiple baffles 45, so that the disturbance of the refrigerant is increased when it flows through the second subcooling tube 44, thereby effectively strengthening the non-phase change heat transfer process between the liquid refrigerant flowing out of the flash subcooling device 4a and the second subcooling tube 44, so that the temperature of the liquid refrigerant is further reduced, thereby effectively improving the subcooling degree of the condenser 10.

[0093] Continue to refer to Figure 1 In some embodiments, the subcooling device 4 further includes a baffle 43. The baffle 43 is disposed between the flash subcooling device 4a and the baffle subcooling device 4b, and the condenser 10 has two flow openings 46 located on both sides of the baffle 43 along the length direction of the heat exchange tube 31, and the two flow openings 46 communicate with the flash subcooling device 4a and the baffle subcooling device 4b.

[0094] Specifically, Figure 1As shown, a gap is provided between the two ends of the baffle 43 and the first tube sheet 21 and the second tube sheet 22, so that two flow openings 46 connecting the flash subcooling device 4a and the baffle subcooling device 4b are formed between the baffle 43 and the first tube sheet 21 and the second tube sheet 22. At this time, the two flow openings 46 are located between the baffle 43 and the first tube sheet 21 and the second tube sheet 22.

[0095] Based on the above configuration, the baffle 43 divides the supercooling device 4 into a flash supercooling zone corresponding to the flash supercooling device 4a and a baffle supercooling zone corresponding to the baffle supercooling device 4b, and enables the flash supercooling zone and the baffle supercooling zone to communicate through two flow ports 46. In this way, the liquid refrigerant obtained after flowing through the flash supercooling zone needs to be diverted from the two flow ports 46 on both sides of the baffle 43 and flow into the baffle supercooling zone. Compared with the case of entering the baffle supercooling zone from one side, the flow rate of the refrigerant can be further reduced, thereby further reducing the refrigerant pressure drop, reducing energy loss, and reducing the risk of refrigerant flash due to excessive pressure drop.

[0096] Among them, refer to Figure 1 In some embodiments, the two flow openings 46 are symmetrically arranged about the refrigerant outlet 1d. In this way, the refrigerant flowing into the baffled subcooling zone from both sides has a more consistent speed and flow rate, which is conducive to achieving a more sufficient baffle heat exchange process and a better baffled subcooling effect.

[0097] Continue to refer to Figure 1 When the two flow ports 46 are arranged symmetrically about the refrigerant outlet 1d, the baffles 45 can be divided into two groups and symmetrically arranged on both sides of the refrigerant outlet 1d to achieve a more balanced baffle heat exchange process on both sides.

[0098] Based on the aforementioned flash orifice plate 41, the first subcooling tube 42, the partition plate 43, the second subcooling tube 44 and the baffle plate 45, the working process of the condenser 10 can be as follows:

[0099] The superheated gaseous refrigerant from the compressor enters the shell 1 from the refrigerant inlet 1c, encounters the colder heat exchange tube 31, exchanges heat with the cooling medium in the heat exchange tube 31, and condenses into a liquid refrigerant with a higher temperature. The liquid refrigerant passes through the flash hole plate 41 and flashes into a gaseous refrigerant and a liquid refrigerant with a lower temperature at the flash hole 412. When the gaseous refrigerant flows through the first supercooling tube 42, it further exchanges heat with the cooling medium in the first supercooling tube 42, condenses into a liquid refrigerant, and merges with the remaining liquid refrigerant after the flash, and together they are diverted from the flow ports 46 on both sides of the partition 43 to the baffle subcooling device 4b, where the baffle 45 increases its speed across the tube bundle, strengthens the non-phase change heat transfer process between the liquid refrigerant and the second supercooling tube 44, further reduces the temperature of the liquid refrigerant, and finally flows out from the refrigerant outlet 1d.

[0100] In the above-mentioned embodiments, the subcooling tubes (including the first subcooling tube 42 and the second subcooling tube 44) and the heat exchange tubes 31 are essentially condensing tubes, and the outer diameters of the two tubes may be the same or different.

[0101] When the outer diameters of the subcooling tube and the heat exchange tube 31 are the same, assembly is convenient. In this case, a condenser tube with the same outer diameter can be used as the subcooling tube and the heat exchange tube 31. During assembly, there is no need to distinguish between the subcooling tube and the heat exchange tube 31, which can avoid misassembly and make the assembly process simpler and more convenient.

[0102] When the outer diameters of the subcooling tube and the heat exchange tube 31 are different, it is beneficial to further improve the subcooling degree of the condenser 10. For example, in some embodiments, the outer diameter of the subcooling tube is smaller than the outer diameter of the heat exchange tube 31. Specifically, in some embodiments, the outer diameters of the first subcooling tube 42 and the second subcooling tube 44 are the same, which is 15-19 mm, while the outer diameter of the heat exchange tube 31 is 19-30 mm. The outer diameter of the heat exchange tube 31 is larger than the outer diameters of the first subcooling tube 42 and the second subcooling tube 44.

[0103] Setting the outer diameter of the subcooling tube to be smaller than the outer diameter of the heat exchange tube 31 is beneficial to speeding up the flow rate of the cooling medium therein and arranging more and denser subcooling tubes in the same space, thereby improving the subcooling heat exchange effect and increasing the subcooling degree.

[0104] At the same time, the second subcooling tube 44 and the first subcooling tube 42 have the same outer diameter, so there is no need to distinguish between the two during the assembly process, which is also helpful to reduce the difficulty of assembly and improve assembly efficiency.

[0105] The above description is only an exemplary embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A condenser (10), characterized in that: include: A shell (1), wherein two ends of the shell (1) along a first direction are respectively provided with a refrigerant inlet (1c) and a refrigerant outlet (1d); A heat exchange device (3) is arranged in the housing (1) and comprises a heat exchange tube (31), wherein the heat exchange tube (31) is used to pass a cooling medium; and A supercooling device (4) is arranged in the housing (1) and is located on a side of the heat exchange device (3) close to the refrigerant outlet (1d), and the supercooling device (4) comprises a flash supercooling device (4a) and a baffle supercooling device (4b), and the flash supercooling device (4a) and the baffle supercooling device (4b) are arranged in sequence along a direction from the refrigerant inlet (1c) to the refrigerant outlet (1d); The refrigerant flowing into the shell (1) from the refrigerant inlet (1c) flows through the heat exchange device (3), the flash subcooling device (4a) and the baffle subcooling device (4b) in sequence, and flows out from the refrigerant outlet (1d).

2. The condenser (10) according to claim 1, characterized in that: The flash subcooling device (4a) comprises a flash orifice plate (41) and a first subcooling tube (42); the flash orifice plate (41) comprises a plate body (411) and a flash orifice (412); the flash orifice (412) is arranged on the plate body (411), and the aperture of the flash orifice (412) decreases along the direction from the refrigerant inlet (1c) to the refrigerant outlet (1d); the first subcooling tube (42) is arranged on a side of the flash orifice plate (41) close to the refrigerant outlet (1d); and the first subcooling tube (42) is used for passing the cooling medium.

3. The condenser (10) according to claim 2, characterized in that: The flash hole plate (41) is constructed as at least one of the following: The maximum aperture of the flash hole (412) With minimum aperture The ratio is 2-8; The maximum aperture of the flash hole (412) 4-10mm; The thickness H of the plate body (411) is equal to the maximum aperture of the flash hole (412). 0.2-0.5 times; The plate body (411) is provided with at least two flash holes (412); The plate body (411) is a straight plate or a non-straight plate.

4. The condenser (10) according to claim 2, characterized in that: The plate body (411) is a V-shaped plate.

5. The condenser (10) according to claim 4, characterized in that: The plate body (411) comprises a first plate portion (413) and a second plate portion (414), wherein the first plate portion (413) and the second plate portion (414) are connected to form a V shape, and an angle θ between the first plate portion (413) and the second plate portion (414) is 150°-175°.

6. The condenser (10) according to claim 2, characterized in that: The first subcooling tube (42) has the same outer diameter as the heat exchange tube (31), or the outer diameter of the first subcooling tube (42) is smaller than the outer diameter of the heat exchange tube (31).

7. The condenser (10) according to claim 6, characterized in that: The outer diameter of the first subcooling tube (42) is 15-19 mm, and the outer diameter of the heat exchange tube (31) is 19-30 mm.

8. The condenser (10) according to claim 1, characterized in that: The baffle subcooling device (4b) comprises a second subcooling tube (44) and a plurality of baffles (45), wherein the plurality of baffles (45) are arranged at intervals along the length direction of the second subcooling tube (44), and two adjacent baffles (45) are arranged alternately in the first direction, the second subcooling tube (44) passes through the plurality of baffles (45), and the second subcooling tube (44) is used to pass the cooling medium.

9. The condenser (10) according to claim 8, characterized in that: The outer diameter of the second subcooling tube (44) is the same as the outer diameter of the first subcooling tube (42).

10. The condenser (10) according to any one of claims 1 to 9, characterized in that: The subcooling device (4) further comprises a baffle (43), wherein the baffle (43) is arranged between the flash subcooling device (4a) and the baffle subcooling device (4b), and the condenser (10) has two flow openings (46) located on both sides of the baffle (43) along the length direction of the heat exchange tube (31), and the two flow openings (46) are connected to the flash subcooling device (4a) and the baffle subcooling device (4b).

11. The condenser (10) according to claim 10, characterized in that: The two flow openings (46) are arranged symmetrically with respect to the refrigerant outlet (1d).

12. The condenser (10) according to claim 10, characterized in that: The two flow ports (46) are located between the baffle (43) and the first tube sheet (21) and the second tube sheet (22) of the condenser (10); the first tube sheet (21) and the second tube sheet (22) are arranged inside the shell (1) and are spaced apart along a second direction perpendicular to the first direction, so as to separate the chambers inside the shell (1).

13. The condenser (10) according to claim 1, characterized in that: In the first direction, the distance between the supercooling device (4) and the refrigerant outlet (1d) is smaller than the distance between the supercooling device (4) and the refrigerant inlet (1c).

14. The condenser (10) according to claim 1, characterized in that The condenser (10) is a horizontal condenser, and the first direction is a vertical direction.

15. An air conditioner, characterized in that: It comprises a condenser (10) as claimed in any one of claims 1 to 14.

Images