Heat exchanger and refrigeration equipment

Abstract

The utility model provides a heat exchanger and refrigeration equipment. The heat exchanger comprises a heat exchange tube and a plurality of fins arranged at intervals in the first direction. An air channel is formed between every two adjacent fins, and the fins are arranged on the heat exchange tubes in a sleeving mode. The heat exchanger comprises a fin air cooling heat exchange module and a tube shell liquid cooling heat exchange module which are arranged in the first direction. The heat exchange tube comprises an air cooling heat exchange tube part and a liquid cooling heat exchange tube part which are arranged in the first direction, and the air cooling heat exchange tube part and the fins form a fin air cooling heat exchange module. The tube shell liquid cooling heat exchange module comprises a tube shell, a baffle plate and a liquid cooling heat exchange tube part, the liquid cooling heat exchange tube part and the baffle plate are both located in the tube shell, the tube shell and the baffle plate form a fluid channel, the liquid cooling heat exchange tube part is located in the fluid channel, and a fluid inlet and a fluid outlet which are both communicated with the fluid channel are formed in the tube shell. The heat exchanger can improve the heat exchange effect, and the problem that an existing fin air cooling heat exchanger is limited in supercooling degree and refrigerating capacity adjusting range is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger technical field, concretely relates to a heat exchanger and refrigeration plant. BACKGROUND

[0002] The condenser is one of the main heat exchange equipment of the refrigeration plant, and is an important component of the air conditioning system. Its function is to cool the high-temperature and high-pressure refrigerant vapor discharged by the compressor through the environmental medium (such as water or air, etc.), and condense it into saturated liquid and supercooled liquid. In some large refrigeration machines, in order to realize the supercooling degree of the refrigerant and thus increase the refrigerating capacity, a special supercooler is usually arranged to be used in cooperation with the condenser.

[0003] At present, the condenser components in the air conditioning field mostly adopt the air wind-cooled condensation heat exchange form of copper tube fin layout, which is easily affected by the working environment conditions (such as air humidity, temperature, thinness and air dust, etc.), resulting in the reduction of heat exchange capacity and heat exchange efficiency, and thus affecting the refrigeration effect of the air conditioner. At the same time, the condenser adopting the single air cooling form has limited adjustment range of supercooling degree, and the application range of the single condenser is relatively narrow, which may even result in the need to set different condensers to cope with different working conditions, thereby increasing the use cost.

[0004] The existing water-cooled and air-cooled dual cold heat exchanger and method based on micro-channel heat exchange structure can realize three cooling modes of separate water cooling, separate air cooling and water-cooled and air-cooled dual cold combined operation, and have the characteristics of low cost, high efficiency and multi-function. However, the water cooling and air cooling structures in the above scheme are both micro-channels, which have the problem of poor heat exchange effect. UTILITY MODEL CONTENTS

[0005] The first object of the utility model is to provide a heat exchanger which can improve the heat exchange effect and solve the problem of limited supercooling degree and refrigerating capacity adjustment range of the existing fin air-cooled heat exchanger.

[0006] The second object of the utility model is to provide a refrigeration plant with the above heat exchanger.

[0007] In order to realize the above first object, the utility model provides a heat exchanger, which comprises heat exchange pipes and multiple fins arranged along a first direction at intervals; an air passage is formed between two adjacent fins, and the fins are sleeved on the heat exchange pipes; the heat exchanger comprises fin air-cooled heat exchange modules and tube-shell liquid-cooled heat exchange modules arranged along the first direction; the heat exchange pipes comprise air-cooled heat exchange pipe parts and liquid-cooled heat exchange pipe parts arranged along the first direction, and the air-cooled heat exchange pipe parts and the fins form the fin air-cooled heat exchange modules; the tube-shell liquid-cooled heat exchange module comprises a tube shell, a baffle and a liquid-cooled heat exchange pipe part, the liquid-cooled heat exchange pipe part and the baffle are both located in the tube shell, the tube shell and the baffle form a fluid passage, the liquid-cooled heat exchange pipe part is located in the fluid passage, and the tube shell is provided with a fluid inlet and a fluid outlet which are both communicated with the fluid passage.

[0008] As can be seen from the above scheme, the heat exchanger of the utility model makes rational use of part of copper pipe of traditional condenser, the pipe passage is for refrigerant working medium, the shell passage adopts liquid cooling working medium such as water, oil, nanofluid, supercritical fluid, etc., this arrangement form connects the air-cooled heat exchange pipe part of the fin air-cooled heat exchange module and the liquid-cooled heat exchange pipe part of the tube-shell liquid-cooled heat exchange module, fully considers the layout of traditional condenser, adopts the way of fin air-cooling and tube-shell liquid-cooling combined heat dissipation, combines the advantages of air-cooling and liquid-cooling heat dissipation. In addition, the tube-shell heat exchange module using liquid cooling is added, which can improve the refrigerating capacity of the system by adjusting the supercooling degree, can realize three working modes of ordinary, super working condition and emergency, increase the application range and emergency capacity of the air conditioner, solve the problem of limited supercooling degree and refrigerating capacity adjustment range of the existing fin air-cooled heat exchanger. At the same time, the refrigerant leakage in the pipe passage will be protected by the shell passage, which improves the safety of use to a certain extent. In addition, the heat exchanger of the utility model can be applied to some extreme conditions of fin air-cooled failure, such as high altitude areas with thin air, condenser fin surface covered with dust and other large thermal resistance dirt, and vacuum experimental environment, etc., and can only start the tube-shell liquid-cooled heat dissipation, improve the application range of the condenser and the whole air conditioning system, and the ability to cope with emergency. In addition, the air-cooled and liquid-cooled combined condensing mode improves the matching and coupling potential of the air conditioning system with other systems to a certain extent, for example, it can be coupled with other energy storage and power generation cycles (such as preheating in supercritical carbon dioxide energy storage and power generation), and utilize low-temperature waste heat; it can also be coupled with the user's domestic water system, and utilize the heat of domestic water to absorb the heat of refrigerant to provide domestic hot water for users.

[0009] One preferred scheme is that the tube-shell liquid-cooled heat exchange module further comprises a spiral flow guide fin made of heat-conducting material; the spiral flow guide fin is arranged outside the liquid-cooled heat exchange pipe part and connected with the liquid-cooled heat exchange pipe part, and the spiral flow guide fin spirally extends along the outer peripheral wall of the heat exchange pipe.

[0010] Therefore, by adding the spiral flow guide fin on the liquid-cooled heat exchange pipe part, on the one hand, the outer heat exchange surface area of the pipe passage is increased, and on the other hand, the spiral flow guide fin can be combined with the baffle plate in the pipe passage and the tube shell to form a spiral flow channel, so that the cooling fluid in the shell passage spirally flows along the flow channel, effectively solving the problem of low flow rate caused by the stagnation of the fluid on the surface of the tube-shell heat exchanger, strengthening the secondary flow, promoting the uniform mixing of the upper and lower fluids, improving the heat exchange efficiency, and also increasing the heat exchange area, further improving the heat exchange effect, and solving the problem of easy stagnation of the fluid on the surface of the object and uneven flow of the fluid in the existing tube-shell heat exchanger.

[0011] A preferred scheme is that the number of baffle plates is multiple, the multiple baffle plates extend along a first direction and are arranged at intervals along a second direction intersecting the first direction; the two side walls of each baffle plate in a third direction are connected with the shell, among the two adjacent baffle plates, the first end of the first baffle plate is connected with the first side wall of the shell, the second end of the first baffle plate and the second side wall of the shell enclose a first communication port, the first end of the second baffle plate and the first side wall of the shell enclose a second communication port, and the second end of the second baffle plate is connected with the second side wall of the shell; the first direction, the second direction and the third direction are perpendicular to each other.

[0012] A further scheme is that the baffle plate has a first plate surface and a second plate surface oppositely arranged in the second direction, and at least one of the first plate surface and the second plate surface is an arc surface; when the first plate surface is an arc surface, the first plate surface is curved towards the second plate surface; and when the second plate surface is an arc surface, the second plate surface is curved towards the first plate surface.

[0013] As can be seen, the curved plate surface of the baffle plate can better cooperate with the spiral flow guide ribs to form a spiral flow channel.

[0014] A preferred scheme is that the shell liquid cooling heat exchange module further comprises a flow guide pipe and an air flow collecting device, the air inlet end of the flow guide pipe is in communication with the air outlet of the air flow collecting device, and the air outlet end of the flow guide pipe is in communication with the fluid passage.

[0015] As can be seen, when the shell heat exchange module is not running, i.e. when the liquid cooling working medium as the heat exchange medium is emptied, the temperature in the shell will rise due to the closure of the shell and the heat dissipation of the copper pipe, and by setting the flow guide pipe and the air flow collecting device, the air flow collecting device introduces the air flow into the fluid passage through the flow guide pipe, taking the heat in the shell out from the fluid outlet, preventing the shell heat exchange module from overheating.

[0016] A further scheme is that the air flow collecting device comprises a wind deflector and an air flow exciting device; the wind deflector is arranged at the air inlet side of the shell liquid cooling heat exchange module and outside the shell, the wind deflector gradually approaches the shell from an edge position to a middle position, the air outlet is located at the middle position, the edge position encloses an air inlet of the wind deflector, and the air flow exciting device is arranged at the air outlet.

[0017] As can be seen, the horn-shaped wind deflector can gather and introduce the air flow into the air outlet, and the wind gathering effect is better, thereby increasing the air volume entering the flow guide pipe from the air outlet.

[0018] Further, the fluid inlet is provided with an inlet valve, the inlet valve comprises a medium inlet and an airflow inlet, the medium inlet and the airflow inlet can be opened or closed independently, the medium inlet and the airflow inlet are communicated with the fluid channel, and the flow guide pipe is connected with the airflow inlet; and / or the fluid outlet is provided with an outlet valve, the outlet valve comprises a medium outlet and an airflow outlet, the medium outlet and the airflow outlet can be opened or closed independently, the medium outlet and the airflow outlet are communicated with the fluid channel, and the flow guide pipe is connected with the airflow outlet.

[0019] Therefore, only two through holes need to be opened on the pipe shell to ensure the sealing of the pipe shell.

[0020] Further, the heat exchanger has at least one of three working conditions of a normal working condition, an adjustable working condition and an emergency working condition; in the normal working condition, the heat exchange medium in the pipe shell liquid cooling heat exchange module is emptied, the medium inlet and the medium outlet are closed, the airflow inlet and the airflow outlet are opened, and the airflow collecting device introduces the airflow into the fluid channel through the flow guide pipe; in the adjustable working condition or the emergency working condition, the airflow inlet and the airflow outlet are closed, the medium inlet and the medium outlet are opened, and the heat exchange medium enters the fluid channel from the medium inlet.

[0021] One preferred scheme is that the flow guide pipe is provided with a one-way valve, the one-way valve is unidirectionally communicated from the air inlet end of the one-way valve to the air outlet end of the one-way valve.

[0022] Therefore, the arrangement of the one-way valve can ensure that the direction of the airflow is the direction of flowing through the air deflector, the flow guide pipe and the fluid channel in turn, and prevent backflow.

[0023] Further, the one-way valve is a Tesla valve.

[0024] Therefore, the valve has a simple structure, can be directly integrated with the flow guide pipe, and can realize unidirectional communication without switch control.

[0025] One preferred scheme is that the inlet end of the heat exchange pipe and the outlet end of the heat exchange pipe are located on the side of the pipe shell liquid cooling heat exchange module away from the fin air cooling heat exchange module.

[0026] Therefore, when the temperature of the refrigerant coming out of the compressor and entering the heat exchanger is too high, the refrigerant working medium can first pass through the pipe shell liquid cooling heat exchange module to reduce heat, maintain the stable operation temperature of the system, and the refrigerant working medium first passing through the pipe shell liquid cooling heat exchange module can improve the supercooling degree of the refrigerant working medium to meet the requirement of improving the refrigerating capacity.

[0027] One preferred scheme is that the heat exchange pipe comprises a plurality of straight pipe sections and a plurality of bent pipe sections, each straight pipe section extends along the first direction and is arranged along the second direction, and the end portions of adjacent two straight pipe sections are communicated through a bent pipe section.

[0028] A preferred scheme is that the number of heat exchange tubes is two or more, each heat exchange tube is arranged in parallel along the third direction; the tube shell comprises a middle partition plate, the middle partition plate separates the internal space of the tube shell into non-communicating chambers, the number of the chambers is the same as the number of the heat exchange tubes, and each chamber is provided with a baffle.

[0029] To achieve the above-mentioned second object, the utility model provides a refrigeration equipment, including above-mentioned heat exchanger. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is the structure diagram of the heat exchanger embodiment of the utility model.

[0031] Figure 2 It is the sectional view of the heat exchanger embodiment of the utility model.

[0032] Figure 3 It is the structure exploded view of the heat exchanger embodiment of the utility model.

[0033] Figure 4 It is the structure diagram of the helical flow guide fin in the heat exchanger embodiment of the utility model.

[0034] Figure 5 It is the sectional view of the tube shell liquid cooling heat exchange module in the heat exchanger embodiment of the utility model.

[0035] Figure 6 It is Figure 5 It is the local enlarged view of A in the middle.

[0036] Figure 7 It is the perspective view of the left side plate and the baffle in the heat exchanger embodiment of the utility model.

[0037] Figure 8 It is the right view of the left side plate and the baffle in the heat exchanger embodiment of the utility model.

[0038] Figure 9 It is the structure diagram of the Tesla valve in the heat exchanger embodiment of the utility model.

[0039] Figure 10 It is the structure diagram of the air flow collecting device in the heat exchanger embodiment of the utility model.

[0040] Figure 11 It is the structure diagram of the inlet valve, the Tesla valve, the flow guide pipe and the air flow collecting device in the heat exchanger embodiment of the utility model.

[0041] The utility model is further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way intended to limit the application, its application, or uses, of which?may have many variations. The application can be practiced in many different forms, including without limitation the embodiments disclosed herein, and is not limited to the embodiments set forth herein. These embodiments are described with the intent of providing those skilled in the art with a complete disclosure and description of the application, and certainly do not limit the scope of the application to the concepts presented in these embodiments. It is believed that the scope of the application encompasses many modifications and variations of the embodiments described herein.

[0043] The terms "first", "second", and similar terms in the present application do not denote any order, quantity, or importance, but are merely used to distinguish different parts. The terms "comprise", "comprising", and similar terms mean that the elements before the term encompass the elements listed after the term, and do not exclude the possibility of also encompassing other elements. The terms "up", "down", "left", "right", and the like are merely used to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0044] In the present application, when it is described that a specific device is located between a first device and a second device, there can be an intervening device between the specific device and the first device or the second device, or there can be no intervening device. When it is described that a specific device is connected to other devices, the specific device can be directly connected to the other devices without an intervening device, or it can not be directly connected to the other devices with an intervening device.

[0045] All terms used in the present application (including technical terms or scientific terms) have the same meaning as understood by those skilled in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formalized sense, unless specifically defined herein.

[0046] Techniques, methods, and equipment known to those skilled in the relevant art can not be discussed in detail, but in appropriate cases, the techniques, methods, and equipment should be considered as part of the specification.

[0047] The refrigeration device comprises a compressor, a fan, and a heat exchanger, the heat exchanger in the present embodiment is a condenser, the fan is arranged on one side of the condenser in the front-rear direction, the compressor is in communication with the heat exchanger and delivers refrigerant working medium to the heat exchanger. The refrigeration device further comprises a throttling valve and an evaporator, the evaporator, the condenser, and the compressor form a refrigerant circulation loop, and the throttling valve is located between the condenser and the evaporator.

[0048] Referring toFigures 1 to 3 The heat exchanger comprises two heat exchange pipes 1 and multiple fins 2 arranged along the left-right direction, an air passage 4 is formed between two adjacent fins 2, and the fins 2 are sleeved on the heat exchange pipes 1.

[0049] The heat exchanger comprises a finned air-cooled heat exchange module 10 and a tube-shell liquid-cooled heat exchange module 20 arranged along the left-right direction. The heat exchange pipe 1 is divided into an air-cooled heat exchange pipe part 11 and a liquid-cooled heat exchange pipe part 12 arranged along the left-right direction by the left side wall of the tube shell 21, and the air-cooled heat exchange pipe part 11 and the fin 2 form the finned air-cooled heat exchange module 10. The inlet end 13 of the heat exchange pipe 1 and the outlet end 14 of the heat exchange pipe 1 are both located on the side of the tube-shell liquid-cooled heat exchange module 20 away from the finned air-cooled heat exchange module 10.

[0050] The tube-shell liquid-cooled heat exchange module 20 comprises the tube shell 21, the baffle 22, the liquid-cooled heat exchange pipe part 12, the spiral flow guide rib 23, the flow guide pipe 24 and the air flow collecting device 3. The liquid-cooled heat exchange pipe part 12 and the baffle 22 are both located in the tube shell 21, the tube shell 21 and the baffle 22 form a fluid passage 25, the liquid cooling working medium can circulate in the fluid passage 25, and the liquid-cooled heat exchange pipe part 12 is located in the fluid passage 25. The fluid inlet 211 and the fluid outlet 212 are both arranged on the tube shell 21 and communicate with the fluid passage 25. The circulation mode of the liquid cooling working medium can be closed circulation or open circulation.

[0051] The heat exchange pipe 1 is composed of multiple straight pipe sections 15 and multiple bent pipe sections 16. Each straight pipe section 15 extends along the left-right direction and is arranged along the vertical direction. The end portions of two adjacent straight pipe sections 15 are connected by a bent pipe section 16.

[0052] The two heat exchange pipes 1 are arranged in parallel along the front-rear direction. The tube shell 21 comprises an outer shell 213 and a vertical partition plate 214. The outer shell 213 is in the shape of a cuboid and comprises an upper wall plate 2131, a lower wall plate 2132, a left wall plate 2133, a right wall plate 2134, a front wall plate 2135 and a rear wall plate 2136. The upper and lower edges of the partition plate 214 are connected to the upper wall plate 2131 and the lower wall plate 2132, respectively, and the left and right edges of the partition plate 214 are connected to the left wall plate 2133 and the right wall plate 2134, respectively. The partition plate 214 divides the internal space of the tube shell 21 into two non-communicating chambers 210 arranged in front and back. The heat exchange pipe 1 corresponds to the chamber 210 one by one, and each chamber 210 is provided with a baffle 22.

[0053] Referring to Figures 2 to 6Spiral flow guide fin 23 is made of heat-conducting material, and is arranged outside and connected with liquid-cooled heat exchange pipe part 12. Spiral flow guide fin 23 extends along the outer peripheral wall of heat exchange pipe 1 in a spiral manner. Optionally, spiral flow guide fin 23 is sleeved outside liquid-cooled heat exchange pipe part 12, or spiral flow guide fin 23 can be in an integrated structure with liquid-cooled heat exchange pipe part 12. By adding spiral flow guide fin 23 on liquid-cooled heat exchange pipe part 12, on one hand, the outer heat exchange surface area of the tube pass is increased, and on the other hand, spiral flow guide fin 23 can be combined with baffle plate 22 and tube shell 21 in the tube pass to form a spiral flow channel, so that the cooling fluid in the shell pass flows spirally along the flow channel, effectively solving the problem of low flow rate caused by the stagnation of fluid on the surface of the tube in the tube-shell heat exchanger, strengthening the secondary flow, promoting the uniform mixing of the upper and lower fluids, improving the heat exchange efficiency, and at the same time, increasing the heat exchange area, further improving the heat exchange effect, and solving the problems of easy stagnation of fluid on the surface of the object and uneven flow of fluid in the existing tube-shell heat exchanger.

[0054] Referring to Figure 2 , Figures 6 to 8 The number of baffle plates 22 is multiple, and the multiple baffle plates 22 are arranged in the left-right direction and spaced apart in the vertical direction. The two side walls of each baffle plate 22 in the front-rear direction are connected with tube shell 21. Among the two adjacent baffle plates 22, one is a first baffle plate 22, and the other is a second baffle plate 22. The first end of the first baffle plate 22 is connected with the first side wall of tube shell 21, and the second end of the first baffle plate 22 and the second side wall of tube shell 21 form a first communication port. The first end of the second baffle plate 22 and the first side wall of tube shell 21 form a second communication port, and the second end of the second baffle plate 22 is connected with the second side wall of tube shell 21. Along the vertical direction, the first baffle plate 22 and the second baffle plate 22 are arranged alternately. The first side wall is located on left wall plate 2133, and the second side wall is located on right wall plate 2134.

[0055] Baffle plate 22 has first plate face 221 and second plate face 222 arranged opposite in the vertical direction. At least one of first plate face 221 and second plate face 222 is an arc surface. In this embodiment, first plate face 221 and second plate face 222 are both arc surfaces, and first plate face 221 is curved towards second plate face 222, and second plate face 222 is curved towards first plate face 221.

[0056] Referring to Figure 2 , Figure 3 and Figures 9 to 11The air inlet end 241 of the flow guide pipe 24 is communicated with the air outlet 312 of the air flow collecting device 3, and the air outlet end of the flow guide pipe 24 is communicated with the fluid channel 25. When the tube-shell heat exchange module is not running, i.e. when the liquid cooling working medium as the heat exchange medium is emptied, the temperature in the shell will rise due to the heat dissipation of the copper pipe as the heat exchange pipe 1 and the closure of the tube-shell 21. By arranging the flow guide pipe 24 and the air flow collecting device 3, the air flow collecting device 3 can introduce the air flow into the fluid channel 25 through the flow guide pipe 24, so as to take out the heat in the shell from the fluid outlet 212 and prevent the tube-shell heat exchange module from overheating.

[0057] The flow guide pipe 24 is provided with a one-way valve 241, which is one-way communicated from the air inlet end 242 to the air outlet end 243. Preferably, the one-way valve 241 is a Tesla valve. The arrangement of the one-way valve 241 can ensure that the direction of the air flow is sequentially through the air deflector 31, the flow guide pipe 24 and the fluid channel 25, so as to prevent reverse flow.

[0058] The air flow collecting device 3 includes an air deflector 31 and an air flow exciting device 32. The air deflector 31 is arranged at the air inlet side of the tube-shell liquid cooling heat exchange module 20 and located outside the tube-shell 21. The air deflector 31 gradually approaches the tube-shell 21 from the edge position to the middle position. The air outlet 312 is located at the middle position, and the edge position surrounds the air inlet 311 of the air deflector 31. The air flow exciting device 32 is arranged at the air outlet 312. The air flow exciting device 32 in the embodiment is a suction fan. The air inlet side of the tube-shell liquid cooling heat exchange module 20 is also the air inlet side of the fin air cooling heat exchange module 10 and the heat exchanger.

[0059] The fluid inlet 211 is provided with an inlet valve 215 including a medium inlet 2151 and an air flow inlet 2152, which can be opened or closed separately. The medium inlet 2151 and the air flow inlet 2152 are both communicated with the fluid channel 25, and the flow guide pipe 24 is connected with the air flow inlet 2152. The fluid outlet 212 is provided with an outlet valve 216 including a medium outlet 2161 and an air flow outlet 2162, which can be opened or closed separately. The medium outlet 2161 and the air flow outlet 2162 are both communicated with the fluid channel 25, and the flow guide pipe 24 is connected with the air flow outlet 2162.

[0060] The heat exchanger has at least one of the three working conditions of normal operation, adjustable operation and emergency operation. The heat exchanger in the embodiment can execute the above three working conditions.

[0061] In the normal operating condition, the heat exchange medium in the tube-shell liquid cooling heat exchange module 20 is emptied, the medium inlet 2151 and the medium outlet 2161 are closed, the air inlet 2152 and the air outlet 2162 are opened, and the air suction fan is started to introduce the air flow into the fluid passage 25 through the guide pipe 24. The high-temperature gaseous refrigerant working medium from the compressor enters the liquid cooling heat exchange pipe part 12 of the tube-shell liquid cooling heat exchange module 20 through the inlet end 13 of the heat exchange pipe 1, transfers part of the heat to the shell side of the tube-shell liquid cooling heat exchange module 20, then flows into the air cooling heat exchange pipe part 11 of the fin air cooling heat exchange module 10, and then enters the liquid cooling heat exchange pipe part 12 of the tube-shell liquid cooling heat exchange module 20 again after part of the heat is dissipated through the fin 2 by cooperating with the fan of the refrigeration equipment, and so on, until the refrigerant working medium flows out of the outlet end 14 of the heat exchange pipe 1 and enters the throttling valve. At the same time, after the air flow is introduced into the fluid passage 25 by the air suction fan through the guide pipe 24, the air flow carries away the excess heat along the flow channel formed by the spiral guide ribs 23, and the hot air is discharged from the air outlet 2162 to prevent the heat from accumulating in the shell side of the sealed space and affecting the heat exchange efficiency.

[0062] In the adjustable operating condition, the air inlet 2152, the air outlet 2162 and the air suction fan are closed, the medium inlet 2151 and the medium outlet 2161 are opened, and the heat exchange medium enters the fluid passage 25 from the medium inlet 2151. The high-temperature gaseous refrigerant working medium from the compressor enters the liquid cooling heat exchange pipe part 12 of the tube-shell liquid cooling heat exchange module 20 through the inlet end 13 of the heat exchange pipe 1, transfers part of the heat to the shell side of the tube-shell liquid cooling heat exchange module 20, then flows into the air cooling heat exchange pipe part 11 of the fin air cooling heat exchange module 10, and then enters the liquid cooling heat exchange pipe part 12 of the tube-shell liquid cooling heat exchange module 20 again after part of the heat is dissipated through the fin 2 by cooperating with the fan, and so on, until the refrigerant working medium flows out of the outlet end 14 of the heat exchange pipe 1 and enters the throttling valve. At the same time, the liquid heat exchange working medium enters the shell side through the medium inlet 2151 and flows along the fluid passage 25 formed by the baffle 22, carrying away the excess heat on the surface of the spiral guide rib 23 and the heat exchange pipe 1. In the process of liquid flow, the liquid is folded and diverted multiple times by the baffle 22, and finally flows out of the medium outlet 2161.

[0063] In the emergency working condition, the air inlet 2152, the air outlet 2162 and the air suction fan are closed, the medium inlet 2151 and the medium outlet 2161 are opened, and the heat exchange medium enters the fluid channel 25 from the medium inlet 2151. The high-temperature gaseous refrigerant working medium from the compressor enters the liquid cooling heat exchange pipe part 12 of the tube-shell liquid cooling heat exchange module 20 from the inlet end 13 of the heat exchange pipe 1, and a part of heat is transferred to the shell side of the tube-shell liquid cooling heat exchange module 20. In the emergency working condition, the fin air cooling heat exchange module 10 is invalid, the refrigerant working medium flows through the fin air cooling heat exchange module 10 and is blocked, the refrigerant working medium has poor heat exchange effect in the area of the fin air cooling heat exchange module 10, and then enters the liquid cooling heat exchange pipe part 12 of the tube-shell liquid cooling heat exchange module 20, and so on, until the refrigerant working medium flows out of the outlet end 14 of the heat exchange pipe 1 and enters the throttling valve. At the same time, the liquid heat exchange working medium enters the shell side along the fluid channel 25 formed by the baffle 22 through the medium inlet 2151, and carries away the excess heat of the spiral guide ribs 23 and the surface of the heat exchange pipe 1. In the liquid flow process, the liquid is folded and turned by the baffle 22 for many times, and finally flows out of the medium outlet 2161.

[0064] As can be seen from the above, the heat exchanger of the utility model reasonably utilizes part of the copper pipe of the traditional condenser, the pipe side is for the refrigerant working medium, and the shell side adopts liquid cooling working medium, such as water, oil, nanofluid, supercritical fluid and the like. This arrangement form connects the air cooling heat exchange pipe part of the fin air cooling heat exchange module and the liquid cooling heat exchange pipe part of the tube-shell liquid cooling heat exchange module, fully considers the layout of the traditional condenser, adopts the air cooling and tube-shell liquid cooling combined heat dissipation mode, and combines the advantages of air cooling and liquid cooling heat dissipation. In addition, the tube-shell heat exchange module adopting liquid cooling is added, the system refrigerating capacity can be improved by adjusting the supercooling degree, three working modes of normal, super working condition and emergency can be realized, the application range and emergency capacity of the air conditioner are increased, the problem that the supercooling degree and refrigerating capacity adjusting range of the existing fin air cooling heat exchanger is limited is solved. At the same time, the refrigerant leakage in the pipe side can be protected by the shell side, and the safety in use is improved to a certain extent. In addition, the heat exchanger of the utility model can be applied to some extreme conditions in which the fin air cooling is invalid, such as the highland area with thin air, the large thermal resistance dirt such as dust covering the surface of the condenser fin, and the vacuum experimental environment, and the like, and the tube-shell liquid cooling heat dissipation can be started only, and the application range of the condenser and the whole air conditioning system and the ability to cope with emergency situations are improved. In addition, the condensing mode combining air cooling and liquid cooling improves the matching and coupling potential of the air conditioning system and other systems to a certain extent, for example, can be coupled with other energy storage and power generation cycles (such as preheating in the supercritical carbon dioxide energy storage and power generation), and utilizes low-temperature waste heat; and can be coupled with the user's domestic water system, absorbs the heat of the refrigerant by using domestic water, and provides domestic hot water for the user.

[0065] In other embodiments, the number of heat exchange tubes can also be one or more than two, when the number of heat exchange tubes is more than two, each heat exchange tube is arranged in parallel along the front-rear direction, the number of chambers inside the shell is the same as the number of heat exchange tubes, the heat exchange tubes correspond to the chambers one by one, and each chamber is provided with a baffle. The type, arrangement, shape, size, etc. of the fins in the fin air-cooling heat exchange module can be changed as needed. The type, spiral angle, pitch, etc. of the spiral guide ribs can be changed as needed. The above changes can also achieve the purpose of the present application.

[0066] Finally, it needs to be emphasized that the above is only the preferred embodiment of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A heat exchanger, characterized by The heat exchange tube and a plurality of fins arranged along a first direction; An air passage is formed between two adjacent fins, and the fins are sleeved on the heat exchange tube; The heat exchanger comprises fin air-cooled heat exchange modules and tube-shell liquid-cooled heat exchange modules arranged along the first direction; The heat exchange tube comprises air-cooled heat exchange tube sections and liquid-cooled heat exchange tube sections arranged along the first direction, and the air-cooled heat exchange tube sections and the fins form the fin air-cooled heat exchange modules; The tube-shell liquid-cooled heat exchange module comprises a tube shell, a baffle and the liquid-cooled heat exchange tube sections, the liquid-cooled heat exchange tube sections and the baffle are located in the tube shell, the tube shell and the baffle form a fluid passage, the liquid-cooled heat exchange tube sections are located in the fluid passage, and the tube shell is provided with a fluid inlet and a fluid outlet which are in communication with the fluid passage.

2. The heat exchanger according to claim 1, wherein: The tube-shell liquid-cooled heat exchange module further comprises a spiral flow guide fin made of a heat-conductive material; The spiral flow guide fin is arranged outside the liquid-cooled heat exchange tube sections and connected with the liquid-cooled heat exchange tube sections, and the spiral flow guide fin spirally extends along the outer circumferential wall of the heat exchange tube.

3. The heat exchanger according to claim 1, wherein: The number of baffles is plural, and the plural baffles are arranged along the first direction and along a second direction intersecting the first direction; The two side walls of each baffle in a third direction are connected with the tube shell, in two adjacent baffles, a first end of a first baffle is connected with a first side wall of the tube shell, a second end of the first baffle and a second side wall of the tube shell form a first communication port, a first end of a second baffle and the first side wall of the tube shell form a second communication port, and a second end of the second baffle is connected with the second side wall of the tube shell; The first direction, the second direction and the third direction are perpendicular to each other.

4. The heat exchanger according to claim 3, wherein: The baffle has a first plate surface and a second plate surface oppositely arranged in the second direction, and at least one of the first plate surface and the second plate surface is an arc surface; When the first plate surface is an arc surface, the first plate surface is curved towards the second plate surface; When the second plate surface is an arc surface, the second plate surface is curved towards the first plate surface.

5. The heat exchanger according to any one of claims 1 to 4, wherein: The tube-shell liquid-cooled heat exchange module further comprises a flow guide pipe and an air flow collecting device, an air inlet end of the flow guide pipe is in communication with an air outlet of the air flow collecting device, and an air outlet end of the flow guide pipe is in communication with the fluid passage.

6. The heat exchanger according to claim 5, wherein: The air flow collecting device comprises a baffle and an air flow exciting device; The baffle is arranged on the air inlet side of the tube-shell liquid-cooled heat exchange module and located outside the tube shell, the baffle gradually approaches the tube shell from an edge position to a middle position, the air outlet is located at the middle position, and the edge position forms an air inlet of the baffle; The air flow exciting device is arranged at the air outlet. ​ 7. The heat exchanger of claim 5, wherein: an inlet valve is arranged at the fluid inlet, the inlet valve comprising a medium inlet and an airflow inlet, the medium inlet and the airflow inlet being independently openable or closable, the medium inlet and the airflow inlet being in communication with the fluid passage, the flow guide being connected to the airflow inlet; and / or an outlet valve is arranged at the fluid outlet, the outlet valve comprising a medium outlet and an airflow outlet, the medium outlet and the airflow outlet being independently openable or closable, the medium outlet and the airflow outlet being in communication with the fluid passage, the flow guide being connected to the airflow outlet.

8. The heat exchanger of claim 7, wherein: the heat exchanger has at least one of a normal operating condition, an adjustable operating condition, and an emergency condition; in the normal operating condition, the heat exchange medium in the tube-shell liquid cooling heat exchange module is emptied, the medium inlet and the medium outlet are closed, the airflow inlet and the airflow outlet are opened, and the airflow collecting device introduces airflow into the fluid passage through the flow guide; in the adjustable operating condition or the emergency condition, the airflow inlet and the airflow outlet are closed, the medium inlet and the medium outlet are opened, and the heat exchange medium enters the fluid passage from the medium inlet.

9. The heat exchanger of claim 5, wherein: a one-way valve is arranged on the flow guide, the one-way valve being unidirectional from an air inlet end of the one-way valve to an air outlet end of the one-way valve.

10. The heat exchanger of claim 9, wherein: the one-way valve is a Tesla valve.

11. The heat exchanger of any one of claims 1 to 4, wherein: the inlet end of the heat exchange tube and the outlet end of the heat exchange tube are both located on a side of the tube-shell liquid cooling heat exchange module that is away from the finned air cooling heat exchange module.

12. The heat exchanger of any one of claims 1 to 4, wherein: the heat exchange tube comprises a plurality of straight tube segments and a plurality of elbow tube segments, each straight tube segment extends along the first direction and is arranged along a second direction, and the end portions of two adjacent straight tube segments are connected by an elbow tube segment.

13. The heat exchanger of any one of claims 1 to 4, wherein: the number of heat exchange tubes is two or more, and each heat exchange tube is arranged in parallel along a third direction; the tube shell comprises a middle partition plate, the middle partition plate divides the internal space of the tube shell into non-communicating chambers, the number of chambers is the same as the number of heat exchange tubes, and each chamber is provided with a baffle plate.

14. A refrigeration appliance characterised in that, The heat exchanger as claimed in any one of claims 1 to 13.

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