Small-pipe-diameter heat exchanger with centralized heat exchange in middle

Abstract

The utility model discloses a small pipe diameter heat exchanger with centralized heat exchange in the middle, which comprises a plurality of heat exchange fins and a heat exchange pipe coil, the transverse pipe part of the heat exchange pipe coil is clamped in corresponding through holes of all the heat exchange fins, a plurality of through holes are formed on the heat exchange fins, and all the through holes are vertically arranged in three groups; the heat exchange pipe coil is composed of a plurality of transverse pipe parts and a plurality of U-shaped bent pipe parts. The heat exchange pipe coil pipe comprises a middle coil pipe part, an upper coil pipe part and a lower coil pipe part, and the total length of a pipe body of the middle coil pipe part is larger than that of a pipe body of the upper coil pipe part or the lower coil pipe part. According to the heat exchanger, the heat exchange coefficient is increased, the size is reduced, the installed heat exchange fins can adopt three rows of through holes, the total coiling length is increased, the coiling amount is increased, the heat exchange effect and the heat exchange efficiency are greatly improved, the coiling amount of the middle coil pipe part is increased, and the heat exchanger can be used in equipment with large ventilation amount in the middle; the utilization rate of the heat exchanger is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchanger processing equipment technical field more specifically relates to a small pipe diameter heat exchanger of central concentrated heat exchange. BACKGROUND

[0002] Tube fin heat exchanger is one of the earliest and most successful discoveries in the process of improving tube heat exchanger. Tube fin heat exchanger has compact structure and excellent heat exchange performance, and is not only suitable for the flow of single-phase fluid, but also has great value for phase change heat exchange. Tube fin heat exchanger has a very wide range of applications, among which air conditioning and refrigeration engineering applications are the most widespread. Industry online data shows that the production of household air conditioners in 2021 was 154.3 million units, of which about 99% of the two devices used tube fin heat exchanger. Tube fin heat exchanger occupies an absolute application advantage in the field of air conditioning.

[0003] At present, tube fin heat exchanger has gradually realized the upgrading of fine diameter from "9.52mm-7mm-5mm". By reducing the diameter of copper pipe in tube fin heat exchanger, the consumption of copper and aluminum materials and the amount of refrigerant charging can be significantly reduced, thereby meeting the cost reduction needs of enterprises.

[0004] In the existing tube fin heat exchanger, the heat exchange pipe is generally a copper pipe, and the heat exchange fin is generally an aluminum fin. For the heat exchanger, the heat exchange inside the tube generally accounts for 40% of the heat exchange capacity, and the heat exchange outside the tube accounts for 60%. At the same time, the density and price of copper material are greater than those of aluminum material. However, the outer diameter of the heat exchange pipe in the existing heat exchanger is generally more than 5mm, and the use of copper material is still large. In addition, in terms of heat exchange performance, the heat exchange coefficient of thin tubes is greater than that of thick tubes. Therefore, under the condition of ensuring heat exchange effect, the use of thin tubes to make heat exchange pipes can reduce the use of copper material and manufacturing cost. However, there is no such structure at present.

[0005] At the same time, in some existing heat exchangers, the heat exchange pipes are uniformly arranged, and when they are installed in the equipment, the middle part has more air flow, which reduces the heat exchange capacity of the upper and lower parts and greatly reduces the utilization rate of the entire heat exchanger. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the defects of the prior art and provides a small pipe diameter heat exchanger with central concentrated heat exchange. The heat exchange pipe coil is made of thin copper pipe, which improves the heat exchange coefficient and reduces the volume. The heat exchange fins can be arranged in three rows of through holes, the heat exchange pipe coil can be wound in the three rows of through holes, the total length of the coil is increased, the winding amount is increased, the heat exchange effect and efficiency are greatly improved, and the utilization rate of the heat exchanger is further improved.

[0007] The technical problem is solved by the following scheme:

[0008] A small-diameter heat exchanger with central heat exchange, comprising a plurality of heat exchange fins and heat exchange tube coils, the transverse tube part of the heat exchange tube coil is clamped in the corresponding through hole of all heat exchange fins, a plurality of through holes are formed on the heat exchange fins, and all through holes are vertically arranged in three groups.

[0009] The heat exchange tube coil is composed of a plurality of transverse tube parts and a plurality of U-shaped bent tube parts.

[0010] The heat exchange tube coil comprises a middle tube coil part, an upper tube coil part and a lower tube coil part, and the total length of the tube body of the middle tube coil part is greater than the total length of the tube body of the upper tube coil part or the lower tube coil part.

[0011] The upper tube coil part and the lower tube coil part are the same structure, and each comprises an oblique bending tube part and an S-shaped bending tube part extending in the vertical direction.

[0012] The oblique bending tube part of the upper tube coil part extends from the topmost through hole of the front row to the topmost through hole of the middle row, the feed end of the oblique bending tube part extends out of the leftmost heat exchange fin, the S-shaped bending tube part is arranged in the upper part of the middle row, and the discharge end of the oblique bending tube part of the upper tube coil part is connected with or formed with the feed port at the top of the S-shaped bending tube part.

[0013] The oblique bending tube part of the lower tube coil part extends from the bottommost through hole of the front row to the bottommost through hole of the middle row, the discharge end of the oblique bending tube part extends out of the leftmost heat exchange fin, the S-shaped bending tube part is arranged in the lower part of the middle row, and the feed end of the oblique bending tube part of the lower tube coil part is connected with or formed with the discharge port at the bottom of the S-shaped bending tube part.

[0014] The discharge port at the bottom of the S-shaped bending tube part of the upper tube coil part is connected with or formed with the feed port at the top of the middle tube coil part, and the discharge port at the bottom of the middle tube coil part is connected with or formed with the feed port at the top of the S-shaped bending tube part of the lower tube coil part.

[0015] The middle tube coil part comprises a plurality of middle S-shaped bending tube parts, the topmost middle S-shaped bending tube part extends obliquely from the corresponding through hole of the rear row to the corresponding through hole of the middle row, and then extends obliquely from the corresponding through hole of the middle row to the corresponding through hole of the front row, the lower middle S-shaped bending tube part extends obliquely from the corresponding through hole of the front row to the corresponding through hole of the middle row, and then extends obliquely from the corresponding through hole of the middle row to the corresponding through hole of the rear row, the feed end of the lower middle S-shaped bending tube part is connected with or formed with the discharge end of the upper middle S-shaped bending tube part, and the upper and lower middle S-shaped bending tube parts are arranged in a staggered manner.

[0016] All the middle S-shaped bent pipe sections are sequentially arranged in this way, the feed inlet of the topmost middle S-shaped bent pipe section is communicated with or formed together with the outlet of the bottom S-shaped bent pipe section of the upper coil pipe section, and the outlet of the bottommost middle S-shaped bent pipe section is communicated with or formed together with the feed inlet of the top S-shaped bent pipe section of the lower coil pipe section.

[0017] The left support connecting frame and the right support connecting frame are inserted and installed at the left end and the right end of the heat exchange pipe coil, the end of the transverse pipe section of the heat exchange pipe coil is clamped on the inner side wall of the corresponding through hole on the vertical plate of the corresponding left support connecting frame or right support connecting frame, and the U-shaped bent pipe section of the heat exchange pipe coil extends out of the outer side of the vertical plate of the left support connecting frame or the right support connecting frame.

[0018] The upper part and the lower part of the left side wall of the left support connecting frame are both fixedly connected with bent plates through bolts, the pipe body at the feed end of the oblique bent pipe section of the upper coil pipe section is fixed on the upper bent plate, and the pipe body at the outlet end of the oblique bent pipe section of the lower coil pipe section is bent upwards and fixed on the lower bent plate.

[0019] The heat exchange pipe coil is a pipe body with a pipe diameter of 4mm to 4.9mm

[0020] The heat exchange pipe coil is a copper pipe, and the heat exchange fin is an aluminum fin.

[0021] The heat exchange pipe coil is a copper pipe, and the heat exchange fin is an aluminum fin.

[0022] Compared with the prior art, the heat exchange pipe coil is made of a 4mm thin copper pipe, so that the heat exchange coefficient is improved, the volume is reduced, the heat exchange fin installed can be provided with three rows of through holes, the heat exchange pipe coil can be wound in the three rows of through holes, the total length of winding is increased, the winding amount is increased, and the heat exchange effect and the heat exchange efficiency are greatly improved, that is, the total length of winding of the heat exchange pipe coil is increased without changing the volume, and the heat exchange amount is improved.

[0023] Secondly, the middle coil section is wound along the three rows of through holes, so that the winding amount of the middle part is increased, the heat exchange amount of the middle part is improved, the use in the equipment with large ventilation volume can be met, and the heat exchange amount and the utilization rate of the heat exchanger are improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a simple schematic diagram of the winding mode of the heat exchange coil of the existing heat exchanger;

[0025] Figure 2 is a local structure schematic diagram of the utility model;

[0026] Figure 3 is Figure 2 is a local structure schematic diagram of the angle change.

[0027] Figure 4 This is a partial schematic diagram of the winding method of the heat exchanger tube coil of this utility model;

[0028] Figure 5 This is a partial structural diagram of the heat exchanger coil;

[0029] Figure 6 yes Figure 5 A schematic diagram of the local structure at a different angle;

[0030] Figure 7 This is a partial structural diagram of the area between adjacent heat exchange fins;

[0031] Figure 8 This is a front view of the present invention;

[0032] Figure 9 This is a comparison chart of test data between this utility model and existing heat exchangers under the same operating conditions. Detailed implementation method:

[0033] For example, see below. Figures 2 to 9 As shown, a small-diameter heat exchanger with centralized heat exchange in the middle includes multiple heat exchange fins 10 and heat exchange tube coils 20. The transverse tube portion of the heat exchange tube coil 20 is inserted into the corresponding through holes of all the heat exchange fins 10. Multiple through holes are formed on the heat exchange fins 10. All through holes are arranged vertically in three groups. The distance between any two adjacent through holes in each row is equal. All through holes in the front row are aligned with all through holes in the rear row. The through holes in the middle row are lower than the horizontal position of the corresponding through holes in the front or rear row. The distance they are lowered is half the distance between two adjacent through holes, that is, the three rows of through holes are staggered.

[0034] The heat exchanger coil 20 consists of multiple horizontal tube sections and multiple U-shaped bends.

[0035] The heat exchanger coil 20 includes a middle coil section 21, an upper coil section 22, and a lower coil section 23. The total length of the tube body of the middle coil section 21 is greater than the total length of the tube body of the upper coil section 22 or the lower coil section 23.

[0036] Furthermore, the upper coil section 22 and the lower coil section 23 have the same structure, each including an obliquely bent tube section 221 (a tube body extending obliquely and bent) and a vertically extending S-shaped bent tube section 222 (a tube body extending in an S-shape).

[0037] The oblique bent pipe section 221 of the upper coil section 22 extends from the topmost through hole of the front row to the topmost through hole of the middle row, the feed end of the oblique bent pipe section 221 extends out of the leftmost heat exchange fin 10, the S-shaped bent pipe section 222 is arranged in the upper part of the middle row, the discharge end of the oblique bent pipe section 221 of the upper coil section 22 is connected with or formed with the feed port at the top of the S-shaped bent pipe section 222;

[0038] The oblique bent pipe section 221 of the lower coil section 23 extends from the bottommost through hole of the front row to the bottommost through hole of the middle row, the discharge end of the oblique bent pipe section 221 extends out of the leftmost heat exchange fin 10, the S-shaped bent pipe section 222 is arranged in the lower part of the middle row, the feed end of the oblique bent pipe section 221 of the lower coil section 23 is connected with or formed with the discharge port at the bottom of the S-shaped bent pipe section 222;

[0039] The discharge port at the bottom of the S-shaped bent pipe section 222 of the upper coil section 22 is connected with or formed with the feed port at the top of the middle coil section 21, the discharge port at the bottom of the middle coil section 21 is connected with or formed with the feed port at the top of the S-shaped bent pipe section 222 of the lower coil section 23.

[0040] The middle coil section 21 comprises a plurality of middle S-shaped bent pipe sections 211 (pipe bodies extending in S-shaped bent manner), the topmost middle S-shaped bent pipe section 211 extends obliquely forward and downward from the corresponding through hole of the rear row to the corresponding through hole of the middle row, and then extends obliquely forward and downward to the corresponding through hole of the front row, the lower middle S-shaped bent pipe section 211 extends obliquely backward and downward from the corresponding through hole of the front row to the corresponding through hole of the middle row, and then extends obliquely backward and downward to the corresponding through hole of the rear row, the feed end of the lower middle S-shaped bent pipe section 211 is connected with or formed with the discharge end of the upper middle S-shaped bent pipe section 211, and the two are arranged in staggered manner.

[0041] All the middle S-shaped bent pipe sections 211 are arranged in this manner, the feed port of the topmost middle S-shaped bent pipe section 211 is connected with or formed with the discharge port at the bottom of the S-shaped bent pipe section 222 of the upper coil section 22, and the discharge port of the bottommost middle S-shaped bent pipe section 211 is connected with or formed with the feed port at the top of the S-shaped bent pipe section 222 of the lower coil section 23.

[0042] Further, the oblique bent pipe section 221 and the S-shaped bent pipe section 222 of the upper coil section 22 and the lower coil section 23 are each composed of a plurality of transverse pipe sections and a plurality of U-shaped bent pipe sections, the two ends of each U-shaped bent pipe section are welded or formed on the corresponding end of two transverse pipe sections;

[0043] Further, the middle S-shaped bent pipe part 211 is also composed of a plurality of transverse pipe parts and a plurality of U-shaped bent pipe parts, and the two ends of the U-shaped bent pipe part are welded or formed on the corresponding one end of the two transverse pipe parts.

[0044] Further, the sleeve part 11 extending leftward or rightward is formed on the inner side wall of the through hole of the heat exchange fin 10, and the transverse pipe part is clamped on the inner side wall of the corresponding sleeve part 11, and the outer side wall is tightly attached to the inner side wall of the corresponding sleeve part 11.

[0045] In each of the adjacent two heat exchange fins 10, the right end of the sleeve part 11 of the left heat exchange fin 10 is pressed against the left end surface of the adjacent right heat exchange fin 10, or the left end surface of the sleeve part 11 of the right heat exchange fin 10 is pressed against the right end surface of the left heat exchange fin 10 (in this embodiment, the left end surface of the sleeve part 11 of the right heat exchange fin 10 is pressed against the right end surface of the left heat exchange fin 10).

[0046] Further, the left support connecting frame 30 and the right support connecting frame 40 are inserted and installed at the left end and the right end of the heat exchange pipe coil 20, the end of the transverse pipe part of the heat exchange pipe coil 20 is clamped on the inner side wall of the corresponding through hole of the vertical plate of the corresponding left support connecting frame 30 or right support connecting frame 40, and the U-shaped bent pipe part of the heat exchange pipe coil 20 extends out of the outer side of the vertical plate of the left support connecting frame 30 or right support connecting frame 40.

[0047] Further, the upper part and the lower part of the left side wall of the left support connecting frame 30 are both fixedly connected with the bent plate 1 through bolts, the pipe body at the feed end of the obliquely bent pipe part 221 of the upper coil part 22 extends out of the outer wall surface of the vertical plate of the left support connecting frame 30 and is fixed on the upper bent plate 1, and the pipe body at the discharge end of the obliquely bent pipe part 221 of the lower coil part 23 extends out of the outer wall surface of the vertical plate of the left support connecting frame 30, is bent upward, and is fixed on the lower bent plate 1.

[0048] The heat exchange pipe coil 20 is made of a pipe body with an outer diameter of 4mm to 4.9mm, and the pipe diameter of the heat exchange pipe coil 20 used in this embodiment is 4mm.

[0049] The heat exchange pipe coil 20 is a copper pipe, and the heat exchange fin 10 is an aluminum fin.

[0050] In the embodiment, the heat exchange pipe coil 20 adopts a copper pipe with a diameter of 4 mm, so that the amount of copper used is lower than that of the existing heat exchange pipe coil with a diameter of 5 mm in the same length, the manufacturing cost is reduced, the heat exchange coefficient is improved by adopting the copper pipe with a diameter of 4 mm to make the heat exchange pipe coil 20, and the volume is reduced, so that the heat exchange fin 10 can be installed in three rows of through holes, the heat exchange pipe coil 20 can be wound in the three rows of through holes, the total length of the winding is increased, the winding amount is increased, and the heat exchange effect and the heat exchange efficiency are greatly improved, that is, the total length of the heat exchange pipe coil winding 20 is increased without changing the volume, and the heat exchange amount is improved.

[0051] At the same time, the middle coil part 21 is wound along the three rows of through holes, so that the winding amount of the middle part is increased, the heat exchange amount of the middle part is improved, and the heat exchange amount and the utilization rate of the heat exchanger can meet the use in the equipment with large ventilation amount in the middle part.

[0052] As shown in Figure 8 , the detection data of the heat exchanger made of the copper pipe with a diameter of 5 mm and with the same size as shown in Figure 1 , it can be seen that the heat exchange amount of the embodiment is improved compared with the existing heat exchanger.

[0053] Finally, the above embodiments are only used to illustrate the present application, and are not limited to the present application. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, therefore all equivalent technical solutions also belong to the scope of the present application, and the patent protection scope of the present application should be limited by the claims.

Claims

1. A small-diameter heat exchanger with mid-central heat exchange, comprising a plurality of heat exchange fins (10) and heat exchange tube coils (20), the transverse tube portions of the heat exchange tube coils (20) being clamped in corresponding through holes of all the heat exchange fins (10), characterized in that: The heat exchange fin (10) is formed with multiple through holes, all of which are vertically arranged in three groups; The heat exchange pipe coil (20) is composed of multiple horizontal pipe sections and multiple U-shaped bent pipe sections; The heat exchange pipe coil (20) comprises a middle pipe coil section (21), an upper pipe coil section (22) and a lower pipe coil section (23), and the total length of the pipe body of the middle pipe coil section (21) is greater than the total length of the pipe body of the upper pipe coil section (22) or the lower pipe coil section (23).

2. A medium central recuperation small diameter heat exchanger according to claim 1, characterized in that: The upper pipe coil section (22) and the lower pipe coil section (23) are identical in structure and each comprises a diagonal bent pipe section (221) and an S-shaped vertically extending bent pipe section (222); The diagonal bent pipe section (221) of the upper pipe coil section (22) extends from the topmost through hole of the front row to the topmost through hole of the middle row, the feeding end of the diagonal bent pipe section (221) extends out of the leftmost heat exchange fin (10), the S-shaped bent pipe section (222) is arranged in the upper part of the middle row, and the discharging end of the diagonal bent pipe section (221) of the upper pipe coil section (22) is connected with or formed with the feeding port at the top of the S-shaped bent pipe section (222); The diagonal bent pipe section (221) of the lower pipe coil section (23) extends from the bottommost through hole of the front row to the bottommost through hole of the middle row, the discharging end of the diagonal bent pipe section (221) extends out of the leftmost heat exchange fin (10), the S-shaped bent pipe section (222) is arranged in the lower part of the middle row, and the feeding end of the diagonal bent pipe section (221) of the lower pipe coil section (23) is connected with or formed with the discharging port at the bottom of the S-shaped bent pipe section (222); The discharging port at the bottom of the S-shaped bent pipe section (222) of the upper pipe coil section (22) is connected with or formed with the feeding port at the top of the middle pipe coil section (21), and the discharging port at the bottom of the middle pipe coil section (21) is connected with or formed with the feeding port at the top of the S-shaped bent pipe section (222) of the lower pipe coil section (23).

3. A medium central recuperation small diameter heat exchanger according to claim 2, characterized in that: The middle pipe coil section (21) comprises multiple middle S-shaped bent pipe sections (211), the topmost middle S-shaped bent pipe section (211) extends obliquely forward and downward from the corresponding through hole of the rear row to the corresponding through hole of the middle row, and then extends obliquely forward and downward to the corresponding through hole of the front row, the lower middle S-shaped bent pipe section (211) extends obliquely rearward and downward from the corresponding through hole of the front row to the corresponding through hole of the middle row, and then extends obliquely rearward and downward to the corresponding through hole of the rear row, the feeding end of the lower middle S-shaped bent pipe section (211) is connected with or formed with the discharging end of the upper middle S-shaped bent pipe section (211), and the two are arranged in a staggered manner. All the middle S-shaped bent pipe sections (211) are sequentially arranged in this way, the feed inlet of the topmost middle S-shaped bent pipe section (211) is communicated with or formed together with the discharge outlet of the bottom S-shaped bent pipe section (222) of the upper coil pipe section (22), and the discharge outlet of the bottommost middle S-shaped bent pipe section (211) is communicated with or formed together with the feed inlet of the top S-shaped bent pipe section (222) of the lower coil pipe section (23).

4. A medium central recuperation small diameter heat exchanger according to claim 3, characterized in that: The oblique bent pipe sections (221) and the S-shaped bent pipe sections (222) of the upper coil pipe section (22) and the lower coil pipe section (23) are each composed of a plurality of transverse pipe sections and a plurality of U-shaped bent pipe sections. The middle S-shaped bent pipe sections (211) are also each composed of a plurality of transverse pipe sections and a plurality of U-shaped bent pipe sections.

5. A medium scale heat exchanger with small tube diameter according to claim 1, characterized in that: A sleeve part (11) extending horizontally to the left or to the right is formed on the inner side wall of the through hole of the heat exchange fin (10), the transverse pipe section is clamped on the inner side wall of the corresponding sleeve part (11), and the outer side wall is tightly attached to the inner side wall of the corresponding sleeve part (11); In every two adjacent heat exchange fins (10), the right end of the sleeve part (11) of the left heat exchange fin (10) is pressed against the left end surface of the adjacent right heat exchange fin (10), or the left end surface of the sleeve part (11) of the right heat exchange fin (10) is pressed against the right end surface of the left heat exchange fin (10).

6. A medium scale heat exchanger with small tube diameter according to claim 1, characterized in that: The heat exchange pipe coil (20) is made of a pipe body with a pipe diameter of 4 mm to 4.9 mm.

7. A medium scale heat exchanger with small tube diameter according to claim 1, characterized in that: The heat exchange pipe coil (20) is a copper pipe, and the heat exchange fin (10) is an aluminum fin.

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