Evaporation core

Abstract

The utility model relates to the field of defrosting of refrigeration equipment, in particular to an evaporation core. The evaporation core body is used for solving the problem that an existing evaporation core body is large in wind resistance. The evaporation core body comprises an evaporation pipe, a heating rod and heat dissipation fins arranged in parallel at intervals, each heat dissipation fin is correspondingly provided with multiple rows of through holes, the arrangement direction of each row of through holes is parallel to the airflow direction, the through holes comprise pipe passing holes allowing the evaporation pipe to penetrate through and rod passing holes allowing the heating rod to penetrate through, and the heat dissipation fins are arranged in the pipe passing holes. The evaporation pipes are sequentially connected in series to form a refrigerant flow channel, and an air passing channel is formed between every two adjacent rows of evaporation pipes. And the heating rods in the same row as the evaporation pipes do not influence the air passing of the air passing channel. In this way, the air resistance generated when the evaporation fan blows air is reduced, and the defrosting efficiency of the evaporation core is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the defrosting field of refrigeration equipment, concretely relates to an evaporation core body. BACKGROUND

[0002] The evaporator is a core component of the refrigeration and refrigeration machine, and its main function is to convert the low-temperature and low-pressure refrigerant liquid into high-temperature and low-pressure refrigerant gas, so as to realize the heat exchange function in the refrigeration process. The evaporator usually comprises an evaporation core body, the evaporation core body comprises evaporation pipes and a plurality of parallel and spaced heat dissipation fins, the heat dissipation fins are provided with pipe passing holes, the evaporation pipes pass through the pipe passing holes and the evaporation pipes are sequentially connected to form a refrigerant flow channel. When the evaporation core body works, its working principle is evaporation heat absorption, so that the surface temperature of the evaporation pipe is too low, thereby forming a frost layer on the surface, which will cause damage to the refrigeration and refrigeration machine over a long period of time, therefore, a hot gas defrosting device is usually configured for the evaporation core body.

[0003] The existing hot gas defrosting device usually has two kinds, one is to compress the refrigerant by using the compressor, the internal temperature and pressure of the refrigerant will increase rapidly after being compressed, the high-temperature and high-pressure refrigerant is directly delivered into the evaporation pipe through the pipeline, and the high-temperature characteristic of the refrigerant compressed by the compressor is used to achieve the purpose of defrosting the evaporation core body. However, this defrosting system has problems of low defrosting efficiency and long time, and part of the temperature of the high-temperature refrigerant compressed by the compressor is lost in the pipeline before entering the evaporation pipe, and at the same time, when the environmental temperature is relatively low, the temperature of the refrigerant compressed by the compressor is relatively low, so it is difficult to quickly and effectively complete the defrosting requirement. The other is to use a heating rod for defrosting, the Chinese utility model patent with the authorization announcement number CN201731687U discloses a composite evaporator for low-temperature experimental equipment, the evaporation core body of the evaporator comprises a heating rod, evaporation pipes and heat dissipation fins, the heat dissipation fins are provided with two rows of perforations along the airflow direction, the two rows of perforations are arranged in a staggered manner, the perforations comprise pipe passing holes for the evaporation pipes to pass through and rod passing holes for the heating rod to pass through, when the evaporation core body is used, the airflow needs to bypass the evaporation pipes or the heating rod arranged in the two rows of perforations respectively, so that the airflow path is a curved path, the flow resistance is large, which is not conducive to air outlet and affects the defrosting effect of the evaporation core body. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing an evaporation core body to solve the problem of large air resistance of the existing evaporation core body.

[0005] The evaporation core body of the utility model adopts the following technical scheme:

[0006] An evaporation core comprises evaporation pipes, heating rods and parallel and spaced heat dissipation fins, each heat dissipation fin is provided with perforations in correspondence, the perforations are arranged in multiple rows and the arrangement direction of each row of perforations is parallel to the airflow direction, the perforations comprise tube passing holes for the evaporation pipes to pass through and rod passing holes for the heating rods to pass through, each evaporation pipe is sequentially connected to form a refrigerant flow channel, and an air passing channel is formed between two adjacent rows of evaporation pipes.

[0007] Further, the heat dissipation fins are arranged in parallelogram shape, and the perforations are arranged in array on the heat dissipation fins.

[0008] Further, the rod passing holes are located at edges of the perforation array.

[0009] Further, the rod passing holes are arranged at each edge of the perforation array.

[0010] Further, the number of rod passing holes at the edge on the air outlet side of the perforation array is greater than that at the edge on the air inlet side.

[0011] Further, the rod passing holes at the edge on the air outlet side are distributed at positions close to both ends and close to the middle of the edge, and the rod passing holes at the edge on the air inlet side are distributed at positions close to both ends of the edge.

[0012] Further, the rod passing holes close to both ends of the edge on the air inlet side correspond to the rod passing holes close to both ends of the edge on the air outlet side.

[0013] Further, the width direction of the heat dissipation fin is consistent with the airflow direction, and the rod passing holes at the edges of both ends of the length direction of the heat dissipation fin are located at the middle position.

[0014] The utility model discloses a kind of element change type technical schemes, heating rod and evaporation pipe are installed in same row, and arrangement direction is parallel to airflow direction. Form air passing channel between two adjacent rows of evaporation pipes, and the heating rod in the same row with evaporation pipe will not affect the air passing of air passing channel. In this way, the air resistance when evaporative fan blows is reduced, and the efficiency of defrosting to evaporation core is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of refrigeration system of freezer and refrigerator;

[0016] Figure 2 It is a three-dimensional structural schematic diagram of the utility model a kind of evaporation core;

[0017] Figure 3 It is Figure 2 front view;

[0018] Figure 4 It is Figure 2 right view;

[0019] Figure 5 Structure diagram of setting over-rod hole and over-pipe hole on the heat dissipation fin.

[0020] In the figure: 1, compressor; 2, normally closed electromagnetic valve; 3, normally open electromagnetic valve; 4, heating rod; 5, condensing core; 6, power module; 7, evaporating core; 71, evaporating pipe; 8, condensing fan; 9, evaporating fan; 10, ambient temperature sensor; 11, heat dissipation fin; 111, over-rod hole; 112, over-pipe hole; 12, refrigeration cycle pipeline, 13, defrosting cycle pipeline. DETAILED DESCRIPTION

[0021] The utility model discloses in view of above-mentioned technical problem and proposes a kind of element change type technical scheme, the core idea of the utility model is: heating rod is installed in the same row with evaporating pipe and the arrangement direction of each row perforation is parallel with airflow direction.Form overwind passage between adjacent two rows of evaporating pipe, heating rod in the same row with evaporating pipe does not affect the overwind of overwind passage, in this way, reduce the air resistance when evaporating fan blows, improve the efficiency of defrosting to evaporating core.

[0022] In view of the above concept, the evaporating core 7 of the utility model includes the evaporating pipe 71, the heating rod 4 and the heat dissipation fin 11 arranged in parallel and spaced apart as shown in Figure 2 、 Figure 3 The heating rod 4 of the embodiment is a resistance heating rod, and the resistance heating rod is connected with the power module 6. The heat dissipation fin 11 is provided with a plurality of rows of perforations, and the arrangement direction of each row of perforations is parallel to the airflow direction. The perforations include the over-pipe hole 112 for the evaporating pipe 71 to pass through and the over-rod hole 111 for the heating rod 4 to pass through as shown in Figure 5 The evaporating pipe 71 is fitted in the over-pipe hole 112, and the end portion of the evaporating pipe 71 is connected in series to form a refrigerant flow passage through a U-shaped connecting pipe. The heating rod 4 is fitted in the over-rod hole 111. The overwind passage is formed between the adjacent two rows of evaporating pipes 71. Compared with the low-temperature experimental equipment composite evaporator in the background art, the heating rod 4 and the evaporating pipe 71 of the embodiment are installed in the same row, and the arrangement direction of each row of perforations is parallel to the airflow direction. The heating rod 4 in the same row with the evaporating pipe 71 does not affect the overwind of the overwind passage. In this way, the air resistance when the evaporating fan 9 blows is reduced, and the efficiency of defrosting to the evaporating core 7 is improved.

[0023] In the embodiment, as shown in Figure 4 、 Figure 5As shown, the heat dissipation fins 11 are arranged in parallelogram shape, and the perforations are arranged in array on the heat dissipation fins 11. The arrayed perforations facilitate the arrangement of the evaporation pipes 71 and the heating rods 4, and also help to improve the defrosting effect. In addition, in other embodiments, the perforations can also be arranged without array, i.e. the distance between the rows and the distance between the columns of the perforations are not the same. The heat dissipation fins 11 of the present embodiment are arranged in non-right-angle parallelogram shape, and the arrayed perforations are also arranged in parallelogram shape which is adapted to the shape of the heat dissipation fins, so as to make the best use of the space of the heat dissipation fins 11. In addition, in other embodiments, the heat dissipation fins 11 can also be arranged in square or rectangular shape, and of course, the perforations are also adapted to the heat dissipation fins 11, i.e. arranged in square or rectangular array. It is easily conceivable that in another embodiment, the heat dissipation fins can also be arranged in trapezoidal shape, and the perforations can also be arranged in trapezoidal array. Of course, in these embodiments, it is necessary to ensure that the arrangement direction of each row of perforations is parallel to the airflow direction.

[0024] In the present embodiment, the rod passing holes 111 are located at the edges of the perforation array. The edges of the evaporation pipes 71 are prone to frost, and therefore, arranging the rod passing holes 111 at the edges of the perforation array can ensure the defrosting effect on the evaporation core 7. In addition, in other embodiments, the rod passing holes can also be located at the middle part or the part near the middle of the perforation array.

[0025] In the present embodiment, the rod passing holes 111 are arranged at the edges of the perforation array. As shown, Figure 4 Figure 5 In the present embodiment, the rod passing holes 111 are arranged at the upper side, the lower side, the left side and the right side edges of the perforation array, and the rod passing holes 111 arranged at the four edges ensure the defrosting effect on the evaporation core 7. In addition, in other embodiments, the rod passing holes can also be arranged only at the single side edge, the double side edges or the three side edges of the perforation array.

[0026] In the present embodiment, the number of rod passing holes 111 at the edge of the perforation array on the air outlet side is greater than the number of rod passing holes 111 at the edge of the perforation array on the air inlet side. When the evaporation fan 9 is working, the heat of the heating rod 4 at the edge on the air inlet side can be blown out along the air passing channel, and of course, the heat decreases along the air passing channel, and the heat at the edge on the air outlet side is very small, and therefore, more rod passing holes 111 are arranged at the air outlet edge of the perforation array to install more heating rods 4, so as to ensure the defrosting effect on the evaporation core 7 at the air outlet edge. In addition, in other embodiments, the number of rod passing holes at the edge of the perforation array on the air outlet side can also be less than or equal to the number of rod passing holes at the edge of the perforation array on the air inlet side.

[0027] ​In the present embodiment, the overbar holes 111 at the edge on the air outlet side are distributed near both ends and near the middle of the edge, and the overbar holes 111 at the edge on the air inlet side are distributed near both ends of the edge. As shown in Figs. 8 and 9, two overbar holes 111 are provided at the edge on the air inlet side (i.e. the left side of the perforated array) and are located near both ends of the edge; three overbar holes 111 are provided at the edge on the air outlet side (i.e. the right side of the perforated array) and are located near both ends and near the middle of the edge. The edge on the air outlet side is prone to frost formation, and the overbar holes 111 near both ends and near the middle of the edge on the air outlet side can uniformly defrost the evaporating tubes 71 according to their arrangement. In addition, in other embodiments, the number and position of overbar holes at the edge on the air outlet or air inlet side can be set as required. Figure 4 、 Figure 5 As shown in Figs. 8 and 9, two overbar holes 111 are provided at the edge on the air inlet side (i.e. the left side of the perforated array) and are located near both ends of the edge; three overbar holes 111 are provided at the edge on the air outlet side (i.e. the right side of the perforated array) and are located near both ends and near the middle of the edge. The edge on the air outlet side is prone to frost formation, and the overbar holes 111 near both ends and near the middle of the edge on the air outlet side can uniformly defrost the evaporating tubes 71 according to their arrangement. In addition, in other embodiments, the number and position of overbar holes at the edge on the air outlet or air inlet side can be set as required.

[0028] In the present embodiment, the overbar holes 111 near both ends of the edge on the air inlet side correspond to the overbar holes 111 near both ends of the edge on the air outlet side. In addition, in other embodiments, the overbar holes near both ends of the edge on the air inlet side can also be staggered with the overbar holes near both ends of the edge on the air outlet side.

[0029] In the present embodiment, the width direction of the heat dissipation fin 11 is consistent with the airflow direction, and the overbar holes 111 at the edges of both ends of the length direction of the heat dissipation fin 11 are located at the middle position. In this way, the airflow of the evaporating fan 9 can be blown out along the width direction of the heat dissipation fin 11, and the left and right sides of the heat dissipation fin 11 in the width direction are not blocked, thereby improving the defrosting efficiency of the evaporating core 7. In addition, in other embodiments, the length direction of the heat dissipation fin can also be consistent with the airflow direction, as long as the effective defrosting of the evaporating core is ensured. The overbar holes 111 located at the middle position of the edges of both ends of the length direction of the heat dissipation fin 11 can defrost the evaporating tubes 71 on both sides. In addition, in other embodiments, the overbar holes at the edges of both ends of the length direction of the heat dissipation fin 11 can also be located at the edge or near the edge.

[0030] The evaporating core 7 of the utility model is usually applied to the refrigeration system of a freezing and refrigerating machine, and the refrigeration system of the freezing and refrigerating machine comprises Figure 1The compressor 1 and the refrigeration cycle pipeline 12 connected with the compressor are shown, and the condenser and the evaporator are sequentially connected along the flow path of the refrigerant. The condenser comprises a condensing core 5 and a condensing fan 8, and the evaporator comprises an evaporating core 7 and an evaporating fan 9. In use, the refrigerant is compressed into high-temperature and high-pressure gas in the compressor 1, and then enters the condensing core 5 through the pipeline for cooling and liquefaction. The liquefied refrigerant is then reduced in pressure and temperature through an expansion valve or a throttling device, and then enters the evaporating core 7 for evaporation and heat absorption process, and then the refrigerant is transported to the compressor 1 through the refrigeration cycle pipeline to start the next refrigeration cycle. An ambient temperature sensor is also provided in the refrigeration system for monitoring the temperature of the surrounding environment. The evaporating core is the same as the above-mentioned evaporating core 7, and thus will not be described here.

[0031] In Figure 1 In the embodiment shown, the defrosting cycle pipeline 13 is also connected in parallel with the condenser on the refrigeration cycle pipeline 12 to input the high-temperature and high-pressure refrigerant compressed by the compressor 1 into the evaporating pipe 71, and the control valves are respectively connected in series on the two parallel branches. The normally open electromagnetic valve 3 is provided on the side of the refrigeration cycle pipeline 12 close to the condenser, and the normally closed electromagnetic valve 2 is provided on the defrosting cycle pipeline 13. The refrigeration system further comprises a control system, which is in control connection with the control valves and the heating rod 4. When defrosting is needed, the power module 6 of the heating rod 4 and the normally closed electromagnetic valve 2 can be opened by the control system, so that the heating rod can defrost the evaporating core 7, and the defrosting cycle pipeline 13 can also input the high-temperature refrigerant compressed by the compressor 1 into the evaporating pipe 71, further improving the defrosting efficiency.

[0032] The above is only a preferred embodiment of the present application, and is not used to limit the present application. The patent protection scope of the present application is subject to the claims, and any equivalent structural changes made according to the content of the specification and drawings of the present application should also be included in the protection scope of the present application.

Claims

1. An evaporation cartridge, characterized by: The heat dissipation fin is arranged in parallelogram, and the perforations are arranged in array on the heat dissipation fin.

2. The evaporation cartridge according to claim 1, characterized in that: The over-rod hole is located at the edge of the perforation array.

3. The evaporation cartridge according to claim 2, characterized in that: Each edge of the perforation array is provided with an over-rod hole.

4. The evaporation cartridge according to claim 3, characterized in that: The number of over-rod holes at the edge on the air outlet side is more than that at the edge on the air inlet side.

5. The evaporation cartridge according to claim 4, characterized by: The over-rod holes at the edge on the air outlet side are distributed near the two ends and near the middle of the edge, and the over-rod holes at the edge on the air inlet side are distributed near the two ends of the edge.

6. The evaporation cartridge according to claim 5, characterized by: The over-rod holes near the two ends of the edge on the air inlet side correspond to the over-rod holes near the two ends of the edge on the air outlet side.

7. The evaporation cartridge according to claim 6, characterized by: The width direction of the heat dissipation fin is consistent with the air flow direction, and the over-rod holes at the two end edges of the length direction are located in the middle position.

8. The evaporation cartridge according to claim 4, characterized by: ​

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