Plate-fin type low-temperature cooler

Abstract

The plate-fin type low-temperature cooler comprises a left end socket and a right end socket which are arranged on the left side and the right side of a heat exchange core body respectively, and the left end socket and the right end socket are each of a box body structure arranged in the length direction of the heat exchange core body. The heat exchange core body comprises side plates arranged on the front side and the rear side of the heat exchange core body, a plurality of heat exchange partition plates which are vertically arranged and arranged in the length direction of the heat exchange core body are arranged between the side plates, and cold side sealing strips and hot side sealing strips are alternately arranged between the heat exchange partition plates. The cold side sealing strips are of a rectangular plate frame structure and attached to the edges of the heat exchange partition plates, channel notches are formed in the positions, corresponding to the left end socket and the right end socket, of the cold side sealing strips, and cold side channels are formed between the cold side sealing strips and the two adjacent heat exchange partition plates. The hot side sealing strips comprise two plate-shaped sealing strips located on the left sides and the right sides of the heat exchange partition plates, and hot side channels are formed between the hot side sealing strips and the two heat exchange partition plates adjacent to the hot side sealing strips. The heat exchanger has the advantages of uniform heat exchange of the heat exchange core body, high heat exchange efficiency, smaller occupied space and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerators, in particular to a plate-fin type low-temperature refrigerator. Background Art

[0002] A heat exchanger is a heat exchanger widely used in reverse Brayton refrigeration cycle cryogenic equipment. The pipes of traditional plate-fin heat exchangers are usually located in the middle of the head and the cross-section of the head is semicircular. Patent publication number CN209623442U discloses an integrated dual-channel printed circuit board type hydrogen filling machine pre-cooling heat exchanger. Since the pipes of the coolant inlet head and the coolant outlet head are both in the middle position, the channel resistance in the middle of the heat exchange core is relatively small, while the channel resistance at the top and bottom of the heat exchange core is relatively large. There are problems such as different channel resistances of the cold side channels on the heat exchange core, and the channel resistance in the cold side channel is large, the heat exchange of the heat exchange core is uneven, which affects the heat exchange efficiency, and occupies a large space. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a plate-fin type low-temperature cooler. The channel resistance of each cold side channel on the heat exchange core is the same, and the channel resistance in the cold side channel is small. The heat exchange core exchanges heat evenly, the heat exchange efficiency is high, and the space occupied is small, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a plate-fin type low-temperature cooler, comprising a left head and a right head respectively provided on the left and right sides of a heat exchange core, the left head being located above the left side of the heat exchange core, the right head being located below the right side of the heat exchange core, the left head and the right head being both box structures arranged along the length direction of the heat exchange core, and the left head and the right head being adapted to the length of the heat exchange core; a pipe 1 is provided at the center of one end face in the length direction of the left head, and a pipe 2 is provided at the center of one end face in the length direction of the right head; the heat exchange core comprises side panels provided on its front and rear sides, and the side panels are provided on the left and right sides. A plurality of heat exchange baffles are arranged vertically and along the length direction of the heat exchange core between the plates, and cold side seals and hot side seals are alternately arranged between the heat exchange baffles; the cold side seal is a rectangular plate frame structure and fits the edge of the heat exchange baffle, and channel notches are opened on the cold side seal at positions corresponding to the left head and the right head, and a cold side channel is formed between the cold side seal and the two adjacent heat exchange baffles; the hot side seal includes two plate-shaped seals arranged in the vertical direction, and the plate-shaped seals are arranged on the left and right sides of the heat exchange baffle, and a hot side channel is formed between the hot side seal and the two adjacent heat exchange baffles.

[0005] Furthermore, the front end faces of the left head and the right head are both square, the ends of the left head and the right head are both provided with rounded corners, and the radius of the rounded corners is between 0.5 and 1 times the side length of the square.

[0006] Furthermore, the hot side channels are each provided with hot side fins that are adapted to their size, and the hot side fins are all vertically arranged rectangular fins.

[0007] Furthermore, a cold side pipe port guide fin A and a cold side pipe port guide fin B are respectively provided at the positions corresponding to pipe 1 and pipe 2 in the cold side channel, and both the cold side pipe port guide fin A and the cold side pipe port guide fin B are rectangular fins arranged in the horizontal direction; guide holes are opened in the vertical direction on the upper edges of each horizontal plate surface of the cold side pipe port guide fin A and the cold side pipe port guide fin B, and the structure of the cold side pipe port guide fin B is the same as that of the cold side pipe port guide fin A; the cold side pipe port guide fin A is a right-angled trapezoidal structure that is wide at the top and narrow at the bottom, and its right side end is an inclined surface, and the cold side pipe port guide fin B is a right-angled trapezoidal structure that is narrow at the top and wide at the bottom, and its left side end is an inclined surface.

[0008] Furthermore, cold side fins are provided in the cold side channel between the cold side pipe port guide fins A and the cold side pipe port guide fins B, and the cold side fins are all vertically arranged zigzag staggered fins.

[0009] Furthermore, the ratio of the length L to the width W of the heat exchange core is in the range of 0.8 to 1.2.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: in the plate-fin type low-temperature cooler, pipe 1 and pipe 2 are respectively located at the center of one end face of the left head and the right head in the length direction, so that the cold fluid in the left head can flow evenly to each cold side channel, and the fluid flowing out of the cold side channel can flow out from the right head with equal resistance, ensuring that the channel resistance of each cold side channel on the heat exchange core is the same, the heat exchange of the heat exchange core is uniform, the heat exchange efficiency is high, and the space occupied is small; the cold fluid in the cold side channel is dispersed more evenly through the cold side pipe port guide fin A, the cold side fin and the cold side pipe port guide fin B, and the hot fluid in the hot side channel is evenly diverted through the hot side fins, so that the heat exchange of the heat exchange core is more uniform and the heat exchange efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the local structure of the heat exchange core of the utility model;

[0013] Figure 3 for Figure 2 Partial magnified image;

[0014] Figure 4 This is a schematic diagram of the right head structure of the utility model;

[0015] Figure 5 This is a schematic diagram of the hot side fin structure of the utility model;

[0016] Figure 6 This is a schematic diagram of the internal structure of the cold side channel of the utility model;

[0017] Figure 7 This is a schematic diagram of the structure of the guide fins inside the cold side channel of the utility model;

[0018] Figure 8 It is a structural schematic diagram of the guide fin A of the cold side pipe port of the utility model.

[0019] In the figure: 1. Left head; 2. Pipe connection 1; 3. Right head; 31. Chamfered corner; 4. Pipe connection 2; 5. Heat exchange core; 51. Side plate; 52. Heat exchange baffle; 53. Cold side seal; 54. Cold side channel; 55. Hot side seal; 56. Hot side channel; 6. Hot side fin; 7. Cold side pipe connection port guide fin A; 71. Diversion hole; 8. Cold side pipe connection port guide fin B; 9. Cold side fin. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0021] See also Figure 1-8 The utility model provides a technical solution: a plate-fin type low-temperature cooler, comprising a left head 1 and a right head 3 respectively arranged on the left and right sides of a heat exchange core 5, wherein the left head 1 is located above the left side of the heat exchange core 5, and the right head 3 is located below the right side of the heat exchange core 5, and both the left head 1 and the right head 3 are box structures arranged along the length direction of the heat exchange core 5, and the left head 1 and the right head 3 are adapted to the length of the heat exchange core 5; a pipe 2 is arranged at the center of one end face in the length direction of the left head 1, and a pipe 2 4 is arranged at the center of one end face in the length direction of the right head 3;

[0022] The heat exchange core 5 includes side plates 51 provided on the front and rear sides thereof, and a plurality of heat exchange baffles 52 are provided between the side plates 51 and arranged along the length direction of the heat exchange core 5, and cold side seals 53 and hot side seals 55 are alternately provided between the heat exchange baffles 52; the cold side seals 53 are rectangular plate frame structures and are fitted with the edges of the heat exchange baffles 52, and channel notches are provided on the cold side seals 53 at positions corresponding to the left head 1 and the right head 3, and a cold side channel 54 is formed between the cold side seals 53 and the two adjacent heat exchange baffles 52;

[0023] The cold side pipe port guide fin A7 and the cold side pipe port guide fin B8 are respectively arranged at the positions corresponding to the pipe 1 2 and the pipe 2 4 in the cold side channel 54. The cold side pipe port guide fin A7 and the cold side pipe port guide fin B8 are both rectangular fins arranged in the horizontal direction. The cold side pipe port guide fin A7 and the cold side pipe port guide fin B8 are each provided with a guide hole 71 in the vertical direction on each horizontal plate surface. 8 has the same structure as the cold side pipe port guide fin A7; the cold side pipe port guide fin A7 is a right-angled trapezoidal structure that is wide at the top and narrow at the bottom and its right side end is an inclined surface, and the cold side pipe port guide fin B8 is a right-angled trapezoidal structure that is narrow at the top and wide at the bottom and its left side end is an inclined surface; cold side fins 9 are provided in the cold side channel 54 between the cold side pipe port guide fins A7 and the cold side pipe port guide fins B8, and the cold side fins 9 are all vertically arranged zigzag staggered fins.

[0024] The hot side seal 55 includes two plate-like seals arranged in the vertical direction, and the plate-like seals are arranged on the left and right sides of the heat exchange baffle 52, and a hot side channel 56 is formed between the hot side seal 55 and the two adjacent heat exchange baffles 52; the hot side channels 56 are each provided with a hot side fin 6 that is adapted to its size, and the hot side fins 6 are all vertically arranged rectangular fins.

[0025] Working principle:

[0026] The cold fluid flows into the cold side channel 54 through the pipe 1 2 and the left end cap 1. The cold fluid in the cold side channel 54 flows along the width direction of the heat exchange core 5 and flows out from the pipe 2 4 through the right end cap 3. The hot fluid flows from the bottom end of the heat exchange core 5 along the hot side channel 56 toward the top end of the heat exchange core 5. The cold fluid and the hot fluid exchange heat through the heat exchange baffle 52, thereby achieving the purpose of reducing the hot fluid.

[0027] Since the pipe 1 2 and the pipe 2 4 are respectively located at the center of one end face of the left head 1 and the right head 3 in the length direction, that is, the pipe 1 2 transports the cold fluid into the left head 1 in a direction perpendicular to the cold side channel 54, so that the cold fluid in the left head 1 can flow evenly into each cold side channel 54, and the fluid in the cold side channel 54 flows into the right head 3 and flows toward the pipe 2 4 in a direction perpendicular to the cold side channel 54, so that the fluid flowing out of the cold side channel 54 can flow out from the right head 3 with equal resistance, ensuring that the channel resistance of each cold side channel 54 on the heat exchange core 5 is the same, the heat exchange of the heat exchange core 5 is uniform, and the heat exchange efficiency is high, and the air supply area of ​​the left head 1 and the air outlet area of ​​the right head 3 are respectively adapted to the channel inlet area and the channel outlet area of ​​the cold side channel 54, and occupy a small space;

[0028] The inlet and outlet ends of the cold side channel 54 are guided by the cold side pipe port guide fins A7 and the cold side pipe port guide fins B8, and the guide holes 71 opened on the cold side pipe port guide fins A7 and the cold side pipe port guide fins B8 are used to divert the cold fluid, and the fluid between the inlet and outlet ends of the cold side channel 54 is guided by the cold side fins 9, and the cold side fins 9 are vertically arranged zigzag staggered fins to reduce the flow resistance of the fluid; the cold side pipe port guide fins A7, the cold side fins 9 and the cold side pipe port guide fins B8 are used to make the cold fluid in the cold side channel 54 more evenly dispersed, and the channel resistance in the cold side channel 54 is small; the hot fluid in the hot side channel 56 is evenly diverted by the hot side fins 6, so that the heat exchange of the heat exchange core 5 is more uniform and the heat exchange efficiency is higher.

[0029] Furthermore, the front end faces of the left head 1 and the right head 3 are both square, and the ends of the left head 1 and the right head 3 are provided with chamfered corners 31, and the radius of the chamfered corners 31 is between 0.5 and 1 times the side length of the square; the special structure of the left head 1 and the right head 3 further reduces the resistance during fluid circulation and avoids eddy current losses.

[0030] Furthermore, the fin spacing of the hot side fins 6 is greater than 3 mm, the fin height is greater than 6 mm, and the fin height of the hot side fins 6 is preferably 9 mm; using hot side fins 6 with large spacing and large height can effectively reduce the defrosting interval.

[0031] Furthermore, the ratio of the length L and width W of the heat exchange core 5 is in the range of 0.8 to 1.2, and the ratio of the length L and width W of the heat exchange core 5 is preferably 1; this can effectively ensure the uniformity of the entire cross-section when the circulating air passes through the hot side channel 56 of the heat exchanger, thereby improving the heat exchange efficiency.

[0032] In the plate-fin type low-temperature cooler disclosed in the present embodiment, pipe 1 2 and pipe 2 4 are respectively located at the center of one end face of the left head 1 and the right head 3 in the length direction, so that the cold fluid in the left head 1 can flow evenly to each cold side channel 54, and the fluid flowing out of the cold side channel 54 can flow out from the right head 3 with equal resistance, ensuring that the channel resistance of each cold side channel 54 on the heat exchange core 5 is the same, the heat exchange of the heat exchange core 5 is uniform, the heat exchange efficiency is high, and the space occupied is small; the cold side pipe port guide fin A7, the cold side fin 9 and the cold side pipe port guide fin B8 are used to make the cold fluid in the cold side channel 54 more evenly dispersed, and the channel resistance in the cold side channel 54 is small; the hot fluid in the hot side channel 56 is evenly diverted by the hot side fin 6, so that the heat exchange of the heat exchange core 5 is more uniform and the heat exchange efficiency is higher.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plate-fin type low-temperature cooler, comprising a left head and a right head respectively provided on the left and right sides of a heat exchange core, characterized in that: The left end cap is located above the left side of the heat exchange core, and the right end cap is located below the right side of the heat exchange core. Both the left end cap and the right end cap are box structures arranged along the length direction of the heat exchange core, and the left end cap and the right end cap are adapted to the length of the heat exchange core; a pipe 1 is provided at the center of one end face in the length direction of the left end cap, and a pipe 2 is provided at the center of one end face in the length direction of the right end cap; the heat exchange core includes side panels arranged at its front and rear sides, and a plurality of heat exchange baffles arranged vertically and arranged along the length direction of the heat exchange core are provided between the side panels , cold side seals and hot side seals are alternately arranged between the heat exchange baffles; the cold side seal is a rectangular plate frame structure and is fitted with the edge of the heat exchange baffle, and channel gaps are opened on the cold side seal at the positions corresponding to the left head and the right head, and a cold side channel is formed between the cold side seal and the two adjacent heat exchange baffles; the hot side seal includes two plate-shaped seals arranged in the vertical direction, and the plate-shaped seals are arranged on the left and right sides of the heat exchange baffle, and a hot side channel is formed between the hot side seal and the two adjacent heat exchange baffles.

2. A plate-fin type cryogenic refrigerator according to claim 1, characterized in that: The front end faces of the left head and the right head are both square, and the ends of the left head and the right head are both provided with rounded corners, and the radius of the rounded corners is between 0.5 and 1 times the side length of the square.

3. A plate-fin type cryogenic refrigerator according to claim 1, characterized in that: The hot side channels are all provided with hot side fins that match the sizes of the hot side channels, and the hot side fins are all vertically arranged rectangular fins.

4. A plate-fin type cryogenic refrigerator according to claim 1, characterized in that: A cold side pipe port guide fin A and a cold side pipe port guide fin B are respectively provided at the positions corresponding to pipe 1 and pipe 2 in the cold side channel. Both the cold side pipe port guide fin A and the cold side pipe port guide fin B are rectangular fins arranged in the horizontal direction; guide holes are opened in the vertical direction on the upper edges of each horizontal plate surface of the cold side pipe port guide fin A and the cold side pipe port guide fin B, and the structure of the cold side pipe port guide fin B is the same as that of the cold side pipe port guide fin A; the cold side pipe port guide fin A is a right-angled trapezoidal structure that is wide at the top and narrow at the bottom, and its right side end is an inclined surface, and the cold side pipe port guide fin B is a right-angled trapezoidal structure that is narrow at the top and wide at the bottom, and its left side end is an inclined surface.

5. A plate-fin type cryogenic refrigerator according to claim 4, characterized in that: Cold side fins are provided in the cold side channel between the cold side pipe port guide fin A and the cold side pipe port guide fin B, and the cold side fins are all vertically arranged zigzag staggered fins.

6. A plate-fin type cryogenic refrigerator according to claim 1, characterized in that: The ratio of the length L to the width W of the heat exchange core is in the range of 0.8 to 1.2.

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