CN210128538U

CN210128538U - High-performance heat exchanger with defrosting mechanism

Info

Publication number: CN210128538U
Application number: CN201920566750.3U
Authority: CN
Inventors: 杨久旺; 张小平; 吴凯; 潘镔镔
Original assignee: Zhejiang Star Polytron Technologies Inc
Current assignee: Zhejiang Star Polytron Technologies Inc
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-03-06
Anticipated expiration: 2029-04-24

Abstract

The high-performance heat exchanger with the defrosting mechanism comprises a shell of the heat exchanger, an evaporator assembly, a flow dividing valve group, a defrosting coil pipe, a throttling assembly and a heat return assembly, wherein the shell comprises a bottom plate, two ends of the bottom plate are fixedly connected with side frames, the side frames comprise rectangular supporting plates, a flow guide bevel edge is formed on the front side of each supporting plate, flanges are formed on the peripheries of the flow guide bevel edge and the supporting plates, a fan installation frame is fixedly connected onto the bottom plate, two sides of the fan installation frame are fixed on the supporting plates of the side frames, a plurality of ventilation holes are formed in the fan installation frame, and a fan opposite to the ventilation holes is fixed on the; the front side of fan installation frame is equipped with the evaporimeter subassembly, and the evaporimeter subassembly is fixed on the bottom plate through a plurality of installing supports, and the installing support comprises vertical support and the horizontal stand of fixing on the bottom plate. The high-performance heat exchanger is a high-integration refrigeration modular device consisting of a throttling device and an evaporator, and occupies small internal space of the cold chain transport vehicle.

Description

High-performance heat exchanger with defrosting mechanism

The technical field is as follows:

the utility model relates to a technical field of cold chain transportation refrigeration plant, more specifically say and relate to high performance heat exchanger that area changes white mechanism.

Background art:

cold chain logistics generally refers to a system project for producing, storing, transporting and selling refrigerated and frozen foods, and ensuring the quality of the foods and reducing the loss of the foods under a specified low-temperature environment in all links before consumption. The cold chain transport vehicle is an important storage and transport device in cold chain logistics, the cold chain transport vehicle needs to be provided with refrigeration equipment for keeping cold storage, the refrigeration equipment comprises a compressor, a condenser, a throttling device and an evaporator, the refrigeration equipment formed by the compressor, the condenser, the throttling device, the evaporator and the like is large in size, the space on the cold chain transport vehicle is limited, and a high-integration-level modularized refrigeration module structure is urgently needed to replace the large refrigeration equipment structure so as to improve the loading capacity of the cold chain transport vehicle.

The utility model has the following contents:

the utility model aims at providing a be not enough to prior art, and provide the high performance heat exchanger of area defrosting mechanism, its high performance heat exchanger is the refrigeration modularization equipment of the high integration that throttling arrangement and evaporimeter are constituteed, and it is little to occupy the inner space of cold chain transport vechicle to have the function of defrosting for the evaporimeter.

The high-performance heat exchanger with the defrosting mechanism comprises a shell of the heat exchanger, an evaporator assembly, a flow dividing valve group, a defrosting coil pipe, a throttling assembly and a heat return assembly, wherein the shell comprises a bottom plate, two ends of the bottom plate are fixedly connected with side frames, the side frames comprise rectangular supporting plates, a flow guide bevel edge is formed on the front side of each supporting plate, flanges are formed on the peripheries of the flow guide bevel edge and the supporting plates, a fan installation frame is fixedly connected onto the bottom plate, two sides of the fan installation frame are fixed on the supporting plates of the side frames, a plurality of ventilation holes are formed in the fan installation frame, and a fan opposite to the ventilation holes is fixed on the; the front side of the fan installation frame is provided with an evaporator assembly, the evaporator assembly is fixed on the bottom plate through a plurality of installation supports, each installation support consists of a vertical support and a horizontal support, the vertical support is fixed on the bottom plate and is positioned on the front side of the evaporator assembly, the front end of the horizontal support is fixed at the upper end of the vertical support, and the rear end of the horizontal support is fixed on the fan installation frame; the defrosting coil is abutted against the upper end face of the evaporator assembly and consists of a plurality of continuous, forward and reverse bent and alternated tube bodies, and the defrosting coil is fixed on the horizontal support through a pipe clamp;

the evaporator component consists of a plurality of heat exchange fins and heat exchange metal tubes, the heat exchange fins are inserted and sleeved on the heat exchange metal tubes, the heat exchange metal tubes are formed by a plurality of continuous heat exchange fins, the heat exchanger comprises a shell, a heat exchange metal pipe body, a connecting pipe group, a shunt valve group, a connecting pipe and a connecting pipe group, wherein the heat exchange metal pipe body is formed by alternately bending forward and backward, two sides of the heat exchange metal pipe body are inserted in supporting plates of side frames, two ends of the heat exchange metal pipe body are inserted in the side frames on one side of the shell and are connected with the shunt valve group through the connecting pipe group, the shunt valve group is fixed in the side frames, the connecting pipe group comprises a connecting pipe and a connecting pipe, the shunt valve group comprises a shunt valve seat and a shunt valve seat, a first joint and a second joint are formed on the shunt valve seat, the first joint is fixedly connected with the shunt joint, the connecting pipe and the connecting pipe are inserted and fixed on the shunt joint; a branch pipe joint communicated with the second channel is formed on the branch joint, one end of the defrosting coil pipe penetrates through the supporting plate on one side of the bottom plate and is fixedly connected with the branch pipe joint on the branch joint, and the other end of the defrosting coil pipe penetrates through the supporting plate on the other side of the bottom plate and is inserted on the turned edge and is formed with a defrosting coil pipe joint with an external thread;

a heat exchange medium inlet pipe is fixedly connected to the bottom plate on the rear side of the fan mounting frame through a pipe clamp, one end of the heat exchange medium inlet pipe penetrates through the support plate on one side of the bottom plate to be inserted into the turned edge and is formed with a heat exchange inlet pipe joint with an external thread, and the other end of the heat exchange medium inlet pipe penetrates through the support plate on the other side of the bottom plate to be formed with a heat exchange outlet pipe joint; the throttling component is a spiral capillary tube, one end of the capillary tube is fixed on the shunt valve seat and communicated with the second channel, the other end of the capillary tube is fixedly connected with a capillary tube joint, and the capillary tube joint is connected with a heat exchange outlet tube joint on a heat exchange medium inlet tube through a tube fitting; a heat return assembly is arranged on the heat exchange medium inlet pipe;

the heat regeneration assembly comprises an outer sleeve, the outer sleeve is inserted and sleeved on the heat exchange medium inlet pipe, two ends of the outer sleeve are provided with necking mouths, and the necking mouths of the outer sleeve are fixed on the outer wall of the heat exchange medium inlet pipe; the two ends of the outer sleeve are respectively and fixedly connected with a regenerative inlet pipe and a regenerative outlet pipe, the regenerative inlet pipe penetrates through a supporting plate on one side of the bottom plate and is fixedly connected to a second joint of the flow dividing valve group, and a channel communicated with the first channel is formed in the second joint of the flow dividing valve group; the backheating outlet pipe penetrates through the supporting plate on the other side of the bottom plate to be inserted on the turned edge and is formed with a backheating outlet pipe joint with external threads.

Preferably, side panels are fixedly connected to the side frames at both sides of the housing.

Preferably, a plurality of hanging holes are formed in flanges of side frames on two sides of the shell, and each hanging hole is composed of a circular insertion hole and a strip-shaped insertion groove.

Preferably, the upper side of the defrosting coil pipe is provided with a cover plate, two sides of the cover plate are fixed on the side frame, the front side of the cover plate is formed with an inclined guide plate, and two sides of the guide plate are fixed on a flanging of a guide bevel edge.

Preferably, a spiral corrugated pipe is formed on the heat exchange medium inlet pipe body on the inner side of the outer sleeve on the heat recovery assembly.

Preferably, the fan mounting frame is provided with at least three ventilation holes, and the ventilation holes are uniformly distributed on the fan mounting frame.

The beneficial effects of the utility model reside in that:

1. the high-performance heat exchanger adopted by the refrigeration system is a high-integration refrigeration modular device consisting of a throttling device and an evaporator, occupies small internal space of a cold chain transport vehicle, and has a function of defrosting the evaporator.

2. The heat exchanger adopted by the device also has a heat return function, so that the utilization rate of resources is improved.

Description of the drawings:

fig. 1 is a schematic three-dimensional structure of the present invention;

FIG. 2 is a schematic perspective view of the cover plate and the sideless plate of the present invention;

fig. 3 is a schematic perspective view of another angle of the cover plate and the sideless panel of the present invention;

FIG. 4 is a schematic view of the structure of the side-free panel and the cover plate of the present invention;

FIG. 5 is a left side view schematic diagram of the structure of the cover plate and the sideless panel of the present invention;

FIG. 6 is a schematic diagram of the structure of the cover plate without side plate in right view;

fig. 7 is a schematic sectional view of the heat recovery assembly of the present invention.

In the figure: 10. a housing; 11. a base plate; 12. a side frame; 121. a support plate; 1211. a flow guiding bevel edge; 122. flanging; 1221. hanging holes; 13. a fan mounting frame; 131. a vent hole; 14. mounting a bracket; 141. a vertical support; 142. a horizontal support; 15. a cover plate; 151. a baffle; 16. a side panel;

20. an evaporator assembly; 21. heat exchange fins; 22. a heat exchange metal tube; 30. a connecting pipe group; 31. connecting the inlet pipe; 32. connecting an outlet pipe; 40. a flow dividing valve block; 41. a tap joint; 411. a pipe dividing joint; 42. a diverter valve seat; 421. a first joint; 422. a second joint; a. a first channel; b. a second channel; 50. defrosting coil pipes; 51. a defrosting coil joint; 60. a throttle assembly; 61. a capillary joint; 62. a pipe fitting; 70. a heat exchange medium inlet pipe; 71. a heat exchange outlet pipe joint; 72. a heat exchange inlet pipe joint; 73. a bellows; 80. a heat regenerative assembly; 81. an outer sleeve; 82. backheating the inlet pipe; 83. a heat regenerative pipe is arranged; 831. and a heat return pipe joint.

The specific implementation mode is as follows:

example (b): as shown in fig. 1 to 7, the high performance heat exchanger with a defrosting mechanism includes a housing 10 of the heat exchanger, an evaporator assembly 20, a flow dividing valve assembly 40, a defrosting coil 50, a throttling assembly 60 and a heat return assembly 80, the housing 10 includes a bottom plate 11, two ends of the bottom plate 11 are fixedly connected with side frames 12, the side frames 12 include rectangular support plates 121, a flow guiding bevel 1211 is formed at the front side of the support plate 121, flanges 122 are formed at the peripheries of the flow guiding bevel 1211 and the support plate 121, a fan mounting frame 13 is fixedly connected to the bottom plate 11, two sides of the fan mounting frame 13 are fixed on the support plates 121 of the side frames 12, a plurality of ventilation holes 131 are formed on the fan mounting frame 13, and a fan opposite to the ventilation holes 131 is fixed on the rear end surface; the evaporator assembly 20 is arranged on the front side of the fan mounting frame 13, the evaporator assembly 20 is fixed on the bottom plate 11 through a plurality of mounting brackets 14, each mounting bracket 14 consists of a vertical bracket 141 and a horizontal bracket 142 which are fixed on the bottom plate 11, the vertical bracket 141 is positioned on the front side of the evaporator assembly 20, the front end of the horizontal bracket 142 is fixed at the upper end of the vertical bracket 141, and the rear end of the horizontal bracket 142 is fixed on the fan mounting frame 13; the defrosting coil 50 is abutted against the upper end face of the evaporator assembly 20, the defrosting coil 50 is composed of a plurality of continuous U-shaped pipe bodies which are bent forwards and backwards alternately, and the defrosting coil 50 is fixed on the horizontal support 142 through a pipe clamp;

the evaporator assembly 20 comprises a plurality of heat exchange fins 21 and heat exchange metal tubes 22, the heat exchange fins 21 are inserted and sleeved on the heat exchange metal tubes 22, the heat exchange metal tubes 22 comprise a plurality of continuous U-shaped tube bodies which are bent alternately in a positive and negative direction, two sides of the tube bodies of the heat exchange metal tubes 22 are inserted and sleeved on the support plates 121 of the side frame 12, two ends of the tube bodies of the heat exchange metal tubes 22 are inserted and arranged in the side frame 12 on one side of the shell 10 and are connected with the flow dividing valve group 40 through the connecting tube group 30, the flow dividing valve group 40 is fixed in the side frame 12, the connecting tube group 30 comprises a connecting inlet tube 31 and a connecting outlet tube 32, the flow dividing valve group 40 comprises a flow dividing valve seat 42, a first joint 421 and a second joint 422 are formed on the flow dividing valve seat 42, a flow dividing joint 41 is fixedly connected on the first joint 421, the connecting inlet tube 31 and the connecting outlet tube 32 are inserted and fixed on the flow dividing joint 41, a, the connection inlet pipe 31 is communicated with the second channel b, and the connection outlet pipe 32 is communicated with the first channel a; a branch pipe joint 411 communicated with the second channel b is formed on the flow dividing joint 41, one end of the defrosting coil 50 passes through the support plate 121 on one side of the bottom plate 11 and is fixedly connected with the branch pipe joint 411 on the flow dividing joint 41, and the other end of the defrosting coil 50 passes through the support plate 121 on the other side of the bottom plate 11 and is inserted into the flanging 122 and is formed with a defrosting coil joint 51 with an external thread;

a heat exchange medium inlet pipe 70 is fixedly connected to the bottom plate 11 on the rear side of the fan mounting frame 13 through a pipe clamp, one end of the heat exchange medium inlet pipe 70 penetrates through the support plate 121 on one side of the bottom plate 11 to be inserted into the flange 122 and is formed with a heat exchange inlet pipe joint 72 with an external thread, and the other end of the heat exchange medium inlet pipe 70 penetrates through the support plate 121 on the other side of the bottom plate 11 to be formed with a heat exchange outlet pipe joint 71; the throttling component 60 is a spiral capillary tube, one end of the capillary tube is fixed on the shunt valve seat 42 and communicated with the second channel b, the other end of the capillary tube is fixedly connected with a capillary tube joint 61, and the capillary tube joint 61 is connected with a heat exchange outlet tube joint 71 on a heat exchange medium inlet tube 70 through a tube fitting 62; a heat return assembly 80 is arranged on the heat exchange medium inlet pipe 70;

the heat recovery assembly 80 comprises an outer sleeve 81, the outer sleeve 81 is inserted and sleeved on the heat exchange medium inlet pipe 70, two ends of the outer sleeve 81 are formed with necking mouths, and the necking mouths of the outer sleeve 81 are fixed on the outer wall of the heat exchange medium inlet pipe 70; the two ends of the outer sleeve 81 are respectively and fixedly connected with a heat return inlet pipe 82 and a heat return outlet pipe 83, the heat return inlet pipe 82 penetrates through the supporting plate 121 on one side of the bottom plate 11 and is fixedly connected to the second joint 422 of the flow dividing valve group 40, and a channel communicated with the first channel a is formed in the second joint 422 of the flow dividing valve group 40; the regenerative outlet pipe 83 passes through the support plate 121 on the other side of the bottom plate 11 and is inserted into the flange 122, and a regenerative outlet pipe joint 831 with an external thread is formed.

Preferably, side panels 16 are fixedly connected to the side frames 12 on both sides of the housing 10.

Preferably, a plurality of hanging holes 1221 are formed on the flanges 122 of the side frames 12 on both sides of the housing 10, and the hanging holes 1221 are formed by circular insertion holes and strip-shaped insertion slots.

Preferably, a cover plate 15 is disposed on the upper side of the defrosting coil 50, two sides of the cover plate 15 are fixed to the side frames 12, an inclined guide plate 151 is formed on the front side of the cover plate 15, and two sides of the guide plate 151 are fixed to the flanges 122 of the guide inclined sides 1211.

Preferably, a spiral corrugated pipe 73 is formed on the body of the heat exchange medium inlet pipe 70 inside the outer sleeve 81 on the heat recovery assembly 80.

Preferably, at least three ventilation holes 131 are formed in the fan mounting frame 13, and the ventilation holes 131 are uniformly distributed in the fan mounting frame 13.

The working principle is as follows: the utility model relates to a high performance heat exchanger with defrosting mechanism, the evaporator component 20, the flow dividing valve group 40, the defrosting coil pipe 50, the throttling component 60 and the heat return component 80 are integrated in the shell 10 as a highly integrated refrigeration module structure, and the throttling mechanism and the evaporator are integrated in the refrigeration module structure;

the heat exchange medium inlet pipe 70 on the refrigeration module structure can be connected with a condenser on the outer side of the cold chain transport vehicle through a connecting pipe; the defrosting coil 50 can be connected with a compressor on the outer side of the cold chain transport vehicle through a connecting pipe, an electromagnetic valve is arranged on the connecting pipe between the defrosting coil and the compressor, and the compressor is connected with the condenser through the connecting pipe; meanwhile, a regenerative outlet pipe 83 on the regenerative assembly 80 can be connected with the compressor through a connecting pipe; the modular structure can form two loops with a compressor and a condenser, one loop is a refrigeration loop: compressor → condenser → heat exchange medium inlet pipe 70 → throttling assembly 60 → evaporator assembly 20 → heat recovery assembly 80 → compressor 1; the other path is a defrosting loop: compressor → defrosting coil 50 → evaporator assembly 20 → regenerator assembly 80 → compressor 1; the refrigeration module has a defrosting function and a heat regeneration function;

the heat recovery function of the heat recovery assembly 80 is provided, so that heat exchange between a low-temperature low-pressure gas refrigerant from the evaporator assembly 20 and a low-temperature high-pressure liquid from the condenser is realized through a structure formed by the heat exchange medium inlet pipe 70 and the heat recovery assembly 80, the temperature of the liquid refrigerant is reduced, the supercooling degree is increased, gasification in the throttling assembly 60 is avoided, and the refrigerating capacity of the subsequent evaporator assembly 20 can be improved; the temperature of the gas refrigerant is increased, the suction temperature of the compressor is increased, the ineffective overheating is reduced, and the working condition of the compressor is improved;

and when the operating temperature of evaporimeter subassembly 20 was below 0 degree, often can frost on the heat transfer fin 21 on the evaporimeter subassembly 20, lead to the heat transfer effect variation between heat transfer fin 21 and the air, under this kind of situation, can open the solenoid valve, the medium that the compressor exit end flows can directly get into in the coil pipe 50 that defrosts, and the coil pipe 50 that defrosts absorbs heat and realizes the defrosting for heat transfer fin 21.

The examples are intended to be illustrative, but not limiting, of the invention. The embodiments can be modified by those skilled in the art without departing from the spirit and scope of the present invention, and therefore, the scope of the present invention should be determined by the appended claims.

Claims

1. High performance heat exchanger of mechanism changes in area, including casing (10), evaporimeter subassembly (20), flow divider group (40), the coil pipe that changes frost (50), throttle subassembly (60) and backheat subassembly (80) of heat exchanger, its characterized in that: the fan mounting structure comprises a shell (10) and a fan mounting frame, wherein the shell (10) comprises a bottom plate (11), two ends of the bottom plate (11) are fixedly connected with side frames (12), each side frame (12) comprises a rectangular supporting plate (121), a flow guide bevel edge (1211) is formed on the front side of each supporting plate (121), flanges (122) are formed on the peripheries of the flow guide bevel edge (1211) and the supporting plate (121), the bottom plate (11) is fixedly connected with the fan mounting frame (13), two sides of the fan mounting frame (13) are fixed on the supporting plates (121) of the side frames (12), a plurality of ventilation holes (131) are formed in the fan mounting frame (13), and a fan opposite to the ventilation holes (131) is; the front side of the fan mounting frame (13) is provided with an evaporator assembly (20), the evaporator assembly (20) is fixed on the bottom plate (11) through a plurality of mounting brackets (14), each mounting bracket (14) consists of a vertical bracket (141) and a horizontal bracket (142) which are fixed on the bottom plate (11), the vertical bracket (141) is positioned on the front side of the evaporator assembly (20), the front end of the horizontal bracket (142) is fixed at the upper end of the vertical bracket (141), and the rear end of the horizontal bracket (142) is fixed on the fan mounting frame (13); the defrosting coil (50) is abutted against the upper end face of the evaporator assembly (20), the defrosting coil (50) consists of a plurality of continuous U-shaped pipe bodies which are bent forwards and backwards alternately, and the defrosting coil (50) is fixed on the horizontal support (142) through a pipe clamp;

the evaporator assembly (20) consists of a plurality of heat exchange fins (21) and heat exchange metal tubes (22), the heat exchange fins (21) are inserted on the heat exchange metal tubes (22), the heat exchange metal tubes (22) consist of a plurality of continuous U-shaped tube bodies which are bent alternately in the positive and negative directions, two sides of the tube bodies of the heat exchange metal tubes (22) are inserted on support plates (121) of side frames (12), two ends of the tube bodies of the heat exchange metal tubes (22) are inserted in the side frames (12) on one side of the shell (10) and are connected with a shunt valve group (40) through a connecting tube group (30), the shunt valve group (40) is fixed in the side frames (12), the connecting tube group (30) consists of a connecting inlet tube (31) and a connecting outlet tube (32), the shunt valve group (40) comprises a shunt valve seat (42), a first joint (421) and a second joint (422) are formed on the shunt valve seat (42), and a shunt joint (41) is fixedly connected on the first joint (421), the connection inlet pipe (31) and the connection outlet pipe (32) are inserted and fixed on the shunt joint (41), a first channel (a) and a second channel (b) which are not communicated with each other are formed in the shunt joint (41) and the shunt valve seat (42), the connection inlet pipe (31) is communicated with the second channel (b), and the connection outlet pipe (32) is communicated with the first channel (a); a branch pipe joint (411) communicated with the second channel (b) is formed on the flow dividing joint (41), one end of the defrosting coil pipe (50) penetrates through a support plate (121) on one side of the bottom plate (11) and is fixedly connected with the branch pipe joint (411) on the flow dividing joint (41), the other end of the defrosting coil pipe (50) penetrates through the support plate (121) on the other side of the bottom plate (11) and is inserted into the flanging (122) and a defrosting coil pipe joint (51) with an external thread is formed;

a heat exchange medium inlet pipe (70) is fixedly connected to the bottom plate (11) on the rear side of the fan mounting frame (13) through a pipe clamp, one end of the heat exchange medium inlet pipe (70) penetrates through a support plate (121) on one side of the bottom plate (11) to be inserted into the flange (122) and is formed with a heat exchange inlet pipe joint (72) with an external thread, and the other end of the heat exchange medium inlet pipe (70) penetrates through a support plate (121) on the other side of the bottom plate (11) to be formed with a heat exchange outlet pipe joint (71); the throttling component (60) is a spiral capillary tube, one end of the capillary tube is fixed on the shunt valve seat (42) and communicated with the second channel (b), the other end of the capillary tube is fixedly connected with a capillary tube joint (61), and the capillary tube joint (61) is connected with a heat exchange outlet tube joint (71) on the heat exchange medium inlet tube (70) through a tube fitting (62); a heat return assembly (80) is arranged on the heat exchange medium inlet pipe (70);

the heat regeneration assembly (80) comprises an outer sleeve (81), the outer sleeve (81) is inserted and sleeved on the heat exchange medium inlet pipe (70), two ends of the outer sleeve (81) are provided with necking mouths, and the necking mouths of the outer sleeve (81) are fixed on the outer wall of the heat exchange medium inlet pipe (70); the two ends of the outer sleeve (81) are respectively and fixedly connected with a heat return inlet pipe (82) and a heat return outlet pipe (83), the heat return inlet pipe (82) penetrates through a supporting plate (121) on one side of the bottom plate (11) and is fixedly connected to a second connector (422) of the flow dividing valve group (40), and a channel communicated with the first channel (a) is formed in the second connector (422) of the flow dividing valve group (40); the heat return pipe (83) penetrates through the supporting plate (121) on the other side of the bottom plate (11) and is inserted into the flanging (122) and is formed with a heat return pipe joint (831) with an external thread.

2. The high performance heat exchanger with defrosting mechanism of claim 1, characterized in that: side panels (16) are fixedly connected to the side frames (12) on the two sides of the shell (10).

3. The high-performance heat exchanger with the defrosting mechanism according to claim 2, wherein: a plurality of hanging holes (1221) are formed in the flanges (122) of the side frames (12) on the two sides of the shell (10), and each hanging hole (1221) consists of a circular insertion hole and a strip-shaped insertion groove.

4. The high performance heat exchanger with defrosting mechanism of claim 1, characterized in that: the defrosting device is characterized in that a cover plate (15) is arranged on the upper side of the defrosting coil (50), two sides of the cover plate (15) are fixed on the side frame (12), an inclined guide plate (151) is formed on the front side of the cover plate (15), and two sides of the guide plate (151) are fixed on a flanging (122) of a guide inclined edge (1211).

5. The high performance heat exchanger with defrosting mechanism of claim 1, characterized in that: and a spiral corrugated pipe (73) is formed on the pipe body of the heat exchange medium inlet pipe (70) at the inner side of the outer sleeve (81) on the heat recovery assembly (80).

6. The high performance heat exchanger with defrosting mechanism of claim 1, characterized in that: the fan installation frame (13) is provided with at least three ventilation holes (131), and the ventilation holes (131) are uniformly distributed on the fan installation frame (13).