A heat pump heat exchanger copper pipe cleaning device and heat exchanger

Abstract

The utility model discloses a kind of heat pump heat exchanger copper pipe cleaning devices and heat exchanger, it is related to air-conditioning heat exchanger technical field, especially it is related to air-conditioning heat exchanger cleaning technical field.A kind of heat pump heat exchanger copper pipe cleaning device, including I-shaped guide rail, pull rod and descaling branch, both sides of I-shaped guide rail are equipped with descaling branch connecting recess, the side end of descaling branch is equipped with the connecting portion of shape adaptation with descaling branch connecting recess, descaling branch is symmetrically arranged in the both sides of I-shaped guide rail by connecting portion.A kind of heat exchanger, including heat exchanger shell and U type copper pipe, the heat pump heat exchanger copper pipe cleaning device of using, I-shaped guide rail is arranged in the opening of U type copper pipe of heat exchanger, and descaling branch is sleeved on the straight pipe of U type copper pipe.The technical scheme of the utility model removes scale adhered to the surface of heat exchanger copper pipe by mechanical mode, without adding cleaning agent to soak copper pipe when descaling, can reduce or avoid the damage of cleaning agent to copper pipe oxide layer.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning heat exchanger technology, and more particularly to the field of air conditioning heat exchanger cleaning technology, specifically referring to a heat pump heat exchanger copper tube cleaning device and heat exchanger. Background Technology

[0002] The water-side heat exchanger is one of the main components of a heat pump, used for the heat exchange between the refrigerant and the circulating water at the indoor terminal. Due to the high temperature at the heat exchange copper tubes, a chemical reaction catalyzes precipitation in the water, making it easy for scale to form on the surface of the copper tubes in the shell-and-tube heat exchanger. Scale adheres to the surface of the copper tubes, affecting heat exchange efficiency and easily causing corrosion of the tube walls, requiring cleaning of the scale adhering to the surface.

[0003] In current applications, descaling often involves soaking and rinsing with weak acidic solvents such as acetic acid and citric acid. However, when using weak acid solutions to rinse scale, the copper tubes are inside the heat exchanger, making it impossible to visually observe the degree of reaction between the scale and the weak acid solvent. This lack of clear assessment of the cleaning results in incomplete reactions and inadequate cleaning. Furthermore, the scale adheres to the copper tubes, and the force of the water flow cannot completely remove it.

[0004] In addition, although weak acid solvents do not easily react with copper, they can damage the oxide layer on the surface of copper pipes. Once the oxide layer is damaged, the copper pipes are easily corroded, causing refrigerant leaks and water ingress into the refrigerant circuit, which in turn damages the equipment.

[0005] Therefore, there is a need for a heat exchanger copper tube cleaning device and a heat pump self-cleaning heat exchanger that can mechanically remove scale from heat exchanger copper tubes, replacing solvent soaking and rinsing, reducing or avoiding solvent damage to the copper tube oxide layer, while controlling the degree of scale removal. Utility Model Content

[0006] The main objective of this invention is to provide a heat pump heat exchanger copper tube cleaning device and heat exchanger to solve the problem that additional descaling agent is required when cleaning the copper tubes of a heat pump heat exchanger in the prior art.

[0007] To achieve the above objectives, this utility model provides a copper tube cleaning device for a heat pump heat exchanger, including an I-shaped guide rail and descaling components symmetrically arranged on both sides of the I-shaped guide rail. Each descaling component has the same structure, including a descaling support arm and a pull rod arranged on both sides of the descaling support arm. The I-shaped guide rail has descaling support arm connecting grooves on both sides, and one end of the descaling support arm has a connecting part that matches the shape of the descaling support arm connecting groove. The descaling support arm is installed on the I-shaped guide rail through the connecting part.

[0008] Each descaling component has a connecting part of the descaling arm and a pull rod through hole on one side of the connecting part. Of the two pull rods of each descaling component, one pull rod passes through the pull rod through hole of the connecting part of the descaling arm, and the other pull rod passes through the pull rod through hole on one side of the descaling arm relative to the connecting part. The pull rods are fixedly connected to the descaling arm, and the descaling arm is moved back and forth by traction pull rods.

[0009] Preferably, the groove connecting the descaling support arm is a dovetail groove.

[0010] Preferably, each descaling component is provided with several descaling arms, which are arranged along the length of the I-shaped guide rail, and the connecting parts of the multiple descaling arms are sequentially inserted into the descaling arm connecting groove.

[0011] Preferably, a pull ring is provided at the end of the multiple pull rods on the same side.

[0012] Preferably, the descaling arm is elongated.

[0013] Preferably, the descaling arm has several copper tube through holes arranged along its length.

[0014] Preferably, an annular cutting blade is provided on both the front and rear sides of the copper tube through hole.

[0015] To achieve the above objectives, this utility model also provides a heat exchanger, including a heat exchanger shell and a copper tube disposed inside the heat exchanger shell. The heat pump heat exchanger copper tube cleaning device is used, the copper tube is a U-shaped copper tube, an I-shaped guide rail is disposed inside the opening of the U-shaped copper tube of the heat exchanger, and a descaling support arm is sleeved on the straight tube of the U-shaped copper tube.

[0016] Preferably, the number of copper tube through holes on each descaling arm is the same as the number of U-shaped copper tubes, the copper tube through holes at corresponding positions of multiple descaling arms of each descaling component are collinear, and the straight tube of the U-shaped copper tube passes through all the collinear copper tube through holes at corresponding positions.

[0017] Preferably, the diameter of each annular cutting blade gradually decreases from the end closest to the descaling arm to the end furthest from the descaling arm, and the end of the annular cutting blade furthest from the descaling arm contacts the copper pipe.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] This invention uses a pull rod to pull each descaling arm to reciprocate along the length of the straight section of the copper pipe. The scale is peeled off by the ring-shaped cutting blade on the descaling arm, thus achieving mechanical descaling. When using the cleaning device provided by this invention to clean scale, there is no need to add descaling agent to soak and rinse the copper pipe, which can reduce or avoid the problem of solvent damaging the oxide layer of the copper pipe.

[0020] This invention can reflect the degree of scale removal on copper pipes by the smoothness of the reciprocating motion of the descaling arm pulled by the pull rod. At the same time, the cleaning device and heat exchanger provided by this invention adopt an integrated design. The descaling arm of the cleaning device is sleeved on the U-shaped copper tube, so that the heat exchanger has its own descaling function, making cleaning more convenient. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of a copper tube cleaning device for a heat pump heat exchanger.

[0023] Figure 2 for Figure 1 Front view.

[0024] Figure 3 for Figure 1 Rear view.

[0025] Figure 4 for Figure 1 Top view.

[0026] Figure 5 This is a schematic diagram of the installation of a copper tube cleaning device for a heat pump heat exchanger.

[0027] Figure 6 for Figure 5 A magnified view of the details in area A.

[0028] Figure 7 This is a schematic diagram of the heat exchanger.

[0029] Figure 8 This is a schematic diagram of the structure of a ring-shaped cutting blade.

[0030] The reference numerals in the above figures are as follows:

[0031] 1. I-shaped guide rail; 11. Descaling support arm connecting groove; 2. Descaling assembly; 21. Descaling support arm; 211. Connecting part; 212. Copper tube through hole; 213. Annular cutting blade; 214. Pull rod through hole; 22. Pull rod; 221. Pull ring; 3. Copper tube; 4. Heat exchanger shell. Detailed Implementation

[0032] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0033] Example 1

[0034] like Figures 1 to 4 The heat pump heat exchanger copper tube cleaning device shown includes an I-shaped guide rail 1 and descaling components 2 symmetrically arranged on both sides of the I-shaped guide rail 1. Each descaling component 2 has the same structure, including a descaling support arm 21 and pull rods 22 arranged on both sides of the descaling support arm 21. The I-shaped guide rail 1 has descaling support arm connecting grooves 11 on both sides. One end of the descaling support arm 21 has a connecting part 211 that matches the shape of the descaling support arm connecting groove 11. The descaling support arm 21 is installed on the I-shaped guide rail 1 through the connecting part 211. Each descaling component 2 is provided with multiple parallel descaling support arms 21. The connecting parts 211 of each descaling support arm 21 are sequentially inserted into the descaling support arm connecting grooves 11. Each cleaning device is provided with four pull rods 22, which are parallel to each other. Pull rings 221 are provided at the ends of the four pull rods on the same side. The pull rings 221 are used to pull the pull rods 22 to move. The descaling support arm connecting grooves 11 are preferably dovetail grooves.

[0035] Each descaling component 2 has a connecting portion 211 and a pull rod through hole 214 at one end of the descaling support arm 21 relative to the connecting portion 211. Of the two pull rods 22 in each descaling component 2, one pull rod 22 passes through the pull rod through hole 214 at the connecting portion 211 of each descaling support arm 21, and the other pull rod 22 passes through the pull rod through hole 214 at one end of the descaling support arm 21 relative to the connecting portion 211. The pull rod 22 is fixedly connected to the descaling support arm 21. By pulling the pull rod 22, the descaling support arm 21 is moved back and forth along the copper pipe 3 to be cleaned, cleaning the scale adhering to the outer wall of the copper pipe 3. The connecting portion 211 and the pull rod through hole 214 at one end of the descaling support arm 21 of each descaling component 2 are collinear. The end of the pull rod 22 without a pull ring 221 passes through all the collinear pull rod through holes 214 at the corresponding positions.

[0036] Specifically, such as Figure 2 and Figure 3 As shown, the descaling arm 21 is long and narrow.

[0037] Specifically, the descaling arm 21 has several copper tube through holes 212 along its length. The copper tube 3 to be descaled passes through the copper tube through holes 212, allowing the descaling arm 21 to be fitted onto the copper tube 3. The descaling arm 21 is fitted onto the straight section of the U-shaped copper tube. The descaling arm 21 is pulled back and forth on the copper tube 3 by the pull rod 22 to peel off the scale on the copper tube 3. The degree of scale cleaning is judged by the smoothness of the movement of the descaling arm 21 driven by the pull rod 22, thus realizing the judgment of the degree of scale cleaning of the copper tubes inside the heat exchanger.

[0038] Specifically, such as Figure 4 As shown, an annular cutting blade 213 is provided on both the front and rear sides of the copper pipe through hole 212, and the two annular cutting blades 213 are symmetrically arranged on both sides of the through hole. The annular cutting blades 213 are used to better remove the scale adhering to the copper pipe 3.

[0039] Example 2

[0040] like Figures 5 to 7 The heat exchanger shown includes a heat exchanger housing 4 and a copper tube 3 disposed inside the heat exchanger housing 4. Using the heat pump heat exchanger copper tube cleaning device described in Embodiment 1, the copper tube 3 of the heat exchanger is a U-shaped copper tube 3. An I-shaped guide rail 11 is disposed inside the opening of the U-shaped copper tube 3 of the heat exchanger, and a descaling support arm 21 is sleeved on the straight tube of the U-shaped copper tube 3. The straight tube of the U-shaped copper tube 3 passes through the copper tube through hole 212 of the descaling support arm 21.

[0041] Specifically, such as Figure 6 As shown, the number of copper tube through holes 212 of each descaling arm 21 is the same as the number of U-shaped copper tubes 3. The copper tube through holes 212 at corresponding positions of multiple descaling arms 21 of each descaling component 2 are collinear, which is equivalent to the collinearity of the copper tube through holes 212 at corresponding positions of multiple descaling arms 21 located on the same side of the I-shaped guide rail 1. The straight tube of the U-shaped copper tube 3 passes through all the collinear copper tube through holes 212 at corresponding positions.

[0042] Specifically, such as Figure 4 As shown, a ring-shaped cutting blade 213 is provided on both the front and rear sides of the copper tube through hole 212. Figure 8 As shown, a set of annular cutting blades 213 are symmetrically arranged on each copper pipe through hole 212. The diameter of each annular cutting blade 213 gradually decreases from the end (a) near the descaling arm 21 to the end (b) away from the descaling arm 21. The end (b) of the annular cutting blade 213 away from the descaling arm 21 is in contact with the copper pipe 3. Because the annular cutting blade 213 is in an inclined state and one end of the annular cutting blade 213 is in contact with the copper pipe 3, when the descaling arm 21 is pulled back and forth on the copper pipe 3, the annular cutting blade 213 can better and faster peel off the scale and other substances attached to the copper pipe 3.

[0043] Specifically, inside the heat exchanger housing 4, below the heat pump heat exchanger copper tube cleaning device, there is a removable scale collection box with an opening at the top. The detached scale falls into the collection box, facilitating subsequent scale cleaning.

[0044] The present invention provides a copper tube cleaning device for a heat pump heat exchanger, and the specific working state of the heat exchanger is as follows:

[0045] The I-shaped guide rail 1 of the heat pump heat exchanger copper tube cleaning device is installed inside the opening of the U-shaped copper tube 3. The descaling arm 21 of the heat pump heat exchanger copper tube cleaning device is sleeved on the straight tube of the U-shaped copper tube 3 through the copper tube through hole 212, making the heat exchanger a built-in copper tube cleaning device. When it is necessary to clean the scale on the outer side of the copper tube 3, the side plate of the heat exchanger is opened, and the pull rod 22 is pulled by the pull ring 221, which drives the descaling arm 21 to move back and forth on the copper tube 3. The annular cutting blade 213 on the copper tube through hole 212 peels off the scale attached to the copper tube 3 during the reciprocating movement of the descaling arm 21. As the scale is peeled off, the movement of the cleaning device on the copper tube 3 becomes smoother and smoother. When the movement of the cleaning device is almost unobstructed, the cleaning of the scale on the copper tube 3 is completed. The cleaning device can quickly clean the scale on the straight part of the U-shaped copper tube 3. For the scale on the curved part of the U-shaped copper tube 3, the side plate of the heat exchanger can be opened and the cleaning brush can be used for cleaning.

[0046] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A copper tube cleaning device for a heat pump heat exchanger, characterized in that, The device includes an I-shaped guide rail and descaling components symmetrically arranged on both sides of the I-shaped guide rail. Each descaling component has the same structure, including a descaling support arm and a pull rod arranged on both sides of the descaling support arm. The I-shaped guide rail has descaling support arm connecting grooves on both sides. One end of the descaling support arm has a connecting part that matches the shape of the descaling support arm connecting groove. The descaling support arm is installed on the I-shaped guide rail through the connecting part. Each descaling component has a connecting part of the descaling arm and a pull rod through hole on one side of the connecting part. Of the two pull rods of each descaling component, one pull rod passes through the pull rod through hole of the connecting part of the descaling arm, and the other pull rod passes through the pull rod through hole on one side of the descaling arm relative to the connecting part. The pull rods are fixedly connected to the descaling arm, and the descaling arm is moved back and forth by traction pull rods.

2. The heat pump heat exchanger copper tube cleaning device according to claim 1, characterized in that, The descaling support arm connecting groove is a dovetail groove.

3. The heat pump heat exchanger copper tube cleaning device according to claim 1, characterized in that, Each descaling component is equipped with several descaling arms, which are arranged along the length of the I-shaped guide rail. The connecting parts of the multiple descaling arms are sequentially inserted into the descaling arm connecting groove.

4. A heat pump heat exchanger copper tube cleaning device according to claim 1, characterized in that, A pull ring is provided at one end of the pull rod.

5. A heat pump heat exchanger copper tube cleaning device according to claim 1, characterized in that, The descaling arm is long and narrow.

6. A heat pump heat exchanger copper tube cleaning device according to claim 5, characterized in that, The descaling arm has several copper tube through holes arranged along its length.

7. A heat pump heat exchanger copper tube cleaning device according to claim 6, characterized in that, A ring-shaped cutting blade is provided on both the front and rear sides of the copper tube through hole.

8. A heat exchanger, comprising a heat exchanger shell and copper tubes disposed inside the heat exchanger shell, characterized in that, The heat pump heat exchanger copper tube cleaning device as described in claim 7 is used, wherein the copper tube is a U-shaped copper tube, an I-shaped guide rail is set inside the opening of the U-shaped copper tube of the heat exchanger, and a descaling support arm is sleeved on the straight tube of the U-shaped copper tube.

9. A heat exchanger according to claim 8, characterized in that, The number of copper tube through holes on each descaling arm is the same as the number of U-shaped copper tubes. The copper tube through holes at corresponding positions of multiple descaling arms of each descaling component are collinear, and the straight tube of the U-shaped copper tube passes through all the collinear copper tube through holes at corresponding positions.

10. A heat exchanger according to claim 9, characterized in that, The diameter of each annular cutting blade gradually decreases from the end closest to the descaling arm to the end furthest from the descaling arm, and the end of the annular cutting blade furthest from the descaling arm is in contact with the copper pipe.

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