Heat exchanger and heat pump unit

Abstract

The present invention discloses a heat exchanger and a heat pump unit. Among them, the heat exchanger includes: a communicating water pipe, which is internally communicated with the heat exchanger; a scale inhibitor device, which is connected to the communicating water pipe, and at least part of the scale inhibitor device is located inside the communicating water pipe, and the scale inhibitor device is used to add a scale inhibitor to the water in the communicating water pipe. The heat exchanger and the heat pump unit provided by the present invention effectively solve the problem that the heat exchanger in the prior art is prone to scale formation.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange equipment, and more particularly, to a heat exchanger and a heat pump unit. Background Art

[0002] Air-cooled cold and hot water products and air source heat pump products are widely used in places for heating and hot water supply. With the increasing heating demand in the north, the water supply temperature of the heat pump is getting higher and higher. The high water temperature will accelerate the scaling of the shell-and-tube heat exchanger on the water side. Scaling leads to poor heat exchange of the shell-and-tube heat exchanger, resulting in high-pressure operation or protection of the system, affecting the normal operation of the system. At the same time, the heat exchange becomes worse and the energy consumption increases. Scaling will also cause blockage of the heat exchanger and accelerate the corrosion of the shell-and-tube heat exchanger.

[0003] In summary, the heat exchanger in the prior art is prone to scaling, resulting in a series of problems. Summary of the Invention

[0004] An embodiment of the present invention provides a heat exchanger and a heat pump unit to solve the problem that the heat exchanger in the prior art is prone to scaling.

[0005] To achieve the above object, the present invention provides a heat exchanger, including: a connecting water pipe, which is connected to the inside of the heat exchanger; a scale inhibitor device, which is connected to the connecting water pipe, at least part of the scale inhibitor device is located inside the connecting water pipe, and the scale inhibitor device is used to add a scale inhibitor to the water in the connecting water pipe.

[0006] Further, the scale inhibitor device includes: a mounting joint, which is fixedly connected to the pipe wall of the connecting water pipe, the mounting joint has a mounting through hole, one end of the mounting through hole is located outside the connecting water pipe, and the other end of the mounting through hole is located inside the connecting water pipe; a scale inhibitor box, which is detachably arranged in the mounting through hole, at least part of the scale inhibitor box is located inside the connecting water pipe, and a scale inhibitor is arranged inside the scale inhibitor box; a flow through hole communicating with the inside of the scale inhibitor box is arranged on the scale inhibitor box, and the water inside the connecting water pipe can flow into contact with the scale inhibitor through the flow through hole.

[0007] Further, a raised mounting step is formed on the inner wall of the mounting through hole, a limiting convex edge is formed on the outer surface of the scale inhibitor box, the limiting convex edge abuts against the mounting step, and the scale inhibitor box is connected to the mounting through hole in a limited way through the cooperation of the limiting convex edge and the mounting step.

[0008] Further, the mounting through hole includes a connected first hole section and a second hole section, the inner diameter of the second hole section is smaller than that of the first hole section, a mounting step is formed at the connection of the first hole section and the second hole section, and the second hole section is located on the side of the first hole section facing the inside of the connecting water pipe.

[0009] Further, the outer diameter of the scale inhibitor cartridge is smaller than the inner diameter of the second hole section; the outer diameter of the limiting convex edge is larger than the inner diameter of the second hole section and smaller than the inner diameter of the first hole section.

[0010] Further, the scale inhibitor device further includes a plug component. The installation through hole has a thread, and the plug component can be threadedly connected into the installation through hole. The plug component is used to block the installation through hole. The plug component is located at the end of the installation through hole and abuts against the limiting convex edge, and the plug component can pre-tighten the limiting convex edge.

[0011] Further, the scale inhibitor device further includes a plug component. The plug component is detachably connected to the installation joint and is used to block the installation through hole.

[0012] Further, the installation through hole has a thread, and the plug component can be threadedly connected into the installation through hole.

[0013] Further, there are at least two connecting water pipes. The heat exchanger further includes a water system cleaning device. The water system cleaning device is internally connected to the heat exchanger through two installation joints. A cleaning circulation water path is formed among the interior of the heat exchanger, the scale inhibitor device, and the water system cleaning device.

[0014] Further, the connecting water pipe is the inlet water pipe or the outlet water pipe of the heat exchanger.

[0015] Further, the heat exchanger is a shell-and-tube heat exchanger. The heat exchanger includes a shell side and a tube side. The shell side is for heat exchange on the water side, and the tube side is for heat exchange of the refrigerant. The connecting water pipe is connected to the shell side.

[0016] According to another aspect of the present invention, a heat pump unit is provided, including the above-mentioned heat exchanger.

[0017] External water flows into the interior of the heat exchanger through the connecting water pipe. When the water enters, it will first pass through the scale inhibitor device. The scale inhibitor in the scale inhibitor device contacts the water and releases scale inhibition factors. The scale inhibition factors carry a large number of weakly charged groups, which can produce a weak electric interference effect with cations such as copper ions, iron ions, magnesium ions, and calcium ions, and anions such as carbonate ions, bicarbonate ions, and sulfate ions in the water, and can quickly inactivate the scale-forming factors in the water. Adding the scale inhibitor to the water by the scale inhibitor device can effectively slow down the scaling inside the heat exchanger, reduce the poor heat transfer caused by the scaling of the heat exchanger, maintain the normal operation of the system, and reduce energy consumption at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view schematic diagram of the heat exchanger according to the embodiment of the present invention;

[0019] Figure 2 is the bottom view schematic diagram of the heat exchanger according to the embodiment of the present invention;

[0020] Figure 3 is Figure 2Schematic cross-sectional view of the heat exchanger along line B-B;

[0021] Figure 4 is Figure 1 Exploded structural schematic diagram of the connecting water pipe and the scale inhibitor device of the heat exchanger;

[0022] Figure 5 is Figure 4 Connectivity schematic diagram of the water system cleaning equipment of the heat exchanger. Specific embodiments

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but it is not intended to limit the present invention.

[0024] See Figures 1 to 5 As shown, according to an embodiment of the present invention, a heat exchanger is provided. The heat exchanger includes a connecting water pipe 10 and a scale inhibitor device 20. The connecting water pipe 10 is in communication with the interior of the heat exchanger; the scale inhibitor device 20 is connected to the connecting water pipe 10, and at least a part of the scale inhibitor device 20 is located inside the connecting water pipe 10. The scale inhibitor device 20 is used to add a scale inhibitor to the water in the connecting water pipe 10.

[0025] External water flows into the interior of the heat exchanger through the connecting water pipe. When the water enters, it will first pass through the scale inhibitor device. The scale inhibitor in the scale inhibitor device 20 comes into contact with the water and releases scale inhibition factors. The scale inhibition factors carry a large number of weakly charged groups, which can interact with cations such as copper ions, iron ions, magnesium ions, and calcium ions in the water, as well as anions such as carbonate ions, bicarbonate ions, and sulfate ions, to produce a weak electric interference effect, which can quickly inactivate the scale-forming factors in the water. Adding a scale inhibitor to the water by the scale inhibitor device 20 can effectively slow down the scaling inside the heat exchanger, reduce the poor heat transfer caused by scaling of the heat exchanger, maintain the normal operation of the system, and at the same time reduce energy consumption.

[0026] Preferably, see Figure 3 and Figure 4, the scale inhibitor device 20 includes an installation joint 21 and a scale inhibitor cartridge 22. The installation joint 21 is fixedly connected to the pipe wall of the communicating water pipe 10. The installation joint 21 has an installation through hole 211. One end of the installation through hole 211 is located outside the communicating water pipe 10, and the other end of the installation through hole 211 is located inside the communicating water pipe 10. The scale inhibitor cartridge 22 is detachably arranged in the installation through hole 211. At least part of the scale inhibitor cartridge 22 is located inside the communicating water pipe 10. A scale inhibitor 30 is arranged inside the scale inhibitor cartridge 22. A flow through hole 221 communicating with the inside of the scale inhibitor cartridge 22 is arranged on the scale inhibitor cartridge 22. The water inside the communicating water pipe 10 can flow into contact with the scale inhibitor through the flow through hole 221. After the water enters the communicating water pipe 10, the water enters the inside of the scale inhibitor cartridge 22 through the flow through hole 221 and contacts the scale inhibitor 30, and then the water carrying the scale inhibition factor flows out from the flow through hole 221 and enters the inside of the heat exchanger. The function of the installation joint 21 is to facilitate the installation and disassembly of the scale inhibitor cartridge 22 and replace it after the scale inhibitor is consumed.

[0027] Preferably, a raised installation step 212 is formed on the inner wall of the installation through hole 211, and a limiting convex edge 222 is formed on the outer surface of the scale inhibitor cartridge 22. The limiting convex edge 222 abuts against the installation step 212, and the scale inhibitor cartridge 22 is connected in the installation through hole 211 in a limited way through the cooperation of the limiting convex edge 222 and the installation step 212. For specific cooperation, see Figure 3 , when installing the scale inhibitor cartridge 22, insert the scale inhibitor cartridge 22 into the installation through hole 211. After the limiting convex edge 222 abuts against the installation step 212, the positioning is completed. The limiting convex edge 222 can be the structure of the scale inhibitor cartridge 22 itself or a separate structure welded to the scale inhibitor cartridge 22.

[0028] The installation through hole 211 includes a connected first hole section 211a and a second hole section 211b. The inner diameter of the second hole section 211b is smaller than that of the first hole section 211a. An installation step 212 is formed at the connection of the first hole section 211a and the second hole section 211b. The second hole section 211b is located on the side of the first hole section 211a facing the inside of the communicating water pipe 10. In this embodiment, the installation through hole 211 is composed of the first hole section 211a and the second hole section 211b, and the structure directly forming the installation step 212 makes the processing simpler. The scale inhibitor cartridge 22 enters the second hole section 211b after entering from the first hole section 211a.

[0029] The outer diameter of the scale inhibitor cartridge 22 is smaller than the inner diameter of the second hole section 211b; the outer diameter of the limiting convex edge 222 is larger than the inner diameter of the second hole section 211b, and the outer diameter of the limiting convex edge 222 is smaller than the inner diameter of the first hole section 211a. In this embodiment, the scale inhibitor cartridge 22 is in the shape shown in the figure, and is integrally cylindrical. The shape of the scale inhibitor cartridge 22 can be other shapes in other embodiments, such as trapezoidal columnar, triangular columnar, etc. The flow through holes 221 on the scale inhibitor cartridge 22 are multiple and are evenly distributed on the main body wall of the scale inhibitor cartridge 22. The size of the scale inhibitor 30 accommodated inside the scale inhibitor cartridge 22 is larger than the aperture of the flow through holes 221.

[0030] When installing the scale inhibitor cartridge 22, it is directly passed through the second hole section 211b, and the part of the scale inhibitor 30 that enters directly enters the inside of the connecting water pipe 10. Then the limiting convex edge 222 is stuck on the installation step 212, so that the scale inhibitor cartridge 22 is in a predetermined position. The positioning is completed by the gravity of the scale inhibitor cartridge 22, without the need for other matching structures, which is simple to manufacture and has a lower cost.

[0031] The scale inhibitor device 20 further includes a plug member 23. The installation through hole 211 has a thread, and the plug member 23 can be threadedly connected inside the installation through hole 211. The plug member 23 is used to block the installation through hole 211. The plug member 23 is located at the end of the installation through hole and abuts against the limiting convex edge 222. The plug member 23 can pre-tighten the limiting convex edge 222. The above-mentioned thread is provided on the entire first hole section or part of the first hole section. When the scale inhibitor is consumed, the plug member 23 is unscrewed, the scale inhibitor cartridge is taken out, refilled with the scale inhibitor and then put into the installation through hole 211, and then the plug member 23 is tightened. The plug member 23 can also abut against and pre-tighten the limiting convex edge 222, so that the limiting convex edge 222 can be stuck on the installation step 212, so that the scale inhibitor cartridge 22 is kept stable and will not be displaced by the impact of the water flow.

[0032] In this embodiment, the connecting water pipe 10 is the inlet water pipe or the outlet water pipe of the heat exchanger. That is to say, the scale inhibitor cartridge 22 can be installed either on the inlet water pipe of the heat exchanger or on the outlet water pipe of the heat exchanger, and all installations can be selected. A water flow switch can also be installed on the outlet water pipe of the heat exchanger as required, and the water flow switch replaces the above-mentioned plug member 23. That is to say, the plug member 23 only needs to select a structural member that realizes the functions of blocking and disassembly and assembly, such as a water flow switch, etc.

[0033] Specifically, the heat exchanger in this embodiment is a shell-and-tube heat exchanger. The heat exchanger includes a shell side and a tube side. The shell side is for water-side heat exchange, and the tube side is for refrigerant heat exchange. The connecting water pipe 10 is communicated with the shell side.

[0034] See Figure 5, there are at least two connecting water pipes 10. The heat exchanger further includes a water system cleaning device 40. The water system cleaning device 40 is internally connected to the heat exchanger through two mounting joints 21. A cleaning circulating water path is formed among the interior of the heat exchanger, the scale inhibitor device 20, and the water system cleaning device 40. When it is necessary to clean the shell-and-tube heat exchanger of the unit in engineering, the plug components 23 at the water inlet pipe and the water outlet pipe are unscrewed, and the water system cleaning device 40 is connected to the mounting joint 21. The water system cleaning device 40 generally consists of a circulating pump, a cleaning water tank, and relevant connecting pipes. During cleaning, a certain proportion of cleaning agent and water are added to the cleaning water tank and circulated through the circulating pump, so as to clean the shell-and-tube heat exchanger. The function of efficient cleaning is realized, and the disassembly and assembly from the engineering water path are avoided, solving the problem that the shell-and-tube heat exchanger is inconvenient to clean in engineering in the prior art.

[0035] The present invention also provides an embodiment of a heat pump unit, and the heat pump unit includes the heat exchanger of the above embodiment.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless otherwise clearly specified in the context, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] It should be noted that the terms "first", "second", etc. in the description, claims, and drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0038] Of course, the above are the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art in the technical field, without departing from the basic principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A heat exchanger, characterized in that, Comprising: A connecting water pipe (10), which is internally connected to the heat exchanger; A scale inhibitor device (20), which is connected to the connecting water pipe (10), at least part of the scale inhibitor device (20) is located inside the connecting water pipe (10), and the scale inhibitor device (20) is used to add a scale inhibitor to the water in the connecting water pipe (10); The scale inhibitor device (20) includes: An installation joint (21), fixedly connected to the pipe wall of the connecting water pipe (10), the installation joint (21) has an installation through hole (211), one end of the installation through hole (211) is located outside the connecting water pipe (10), and the other end of the installation through hole (211) is located inside the connecting water pipe (10); A scale inhibitor cartridge (22), detachably arranged in the installation through hole (211), at least part of the scale inhibitor cartridge (22) is located inside the connecting water pipe (10), and a scale inhibitor is arranged inside the scale inhibitor cartridge (22); a flow through hole (221) communicating with the inside of the scale inhibitor cartridge (22) is arranged on the scale inhibitor cartridge (22), and the water inside the connecting water pipe (10) can flow into contact with the scale inhibitor through the flow through hole (221); A raised installation step (212) is formed on the inner wall of the installation through hole (211), a limiting convex edge (222) is formed on the outer surface of the scale inhibitor cartridge (22), the limiting convex edge (222) abuts against the installation step (212), and the scale inhibitor cartridge (22) is limited and connected in the installation through hole (211) through the cooperation of the limiting convex edge (222) and the installation step (212).

2. The heat exchanger according to claim 1, wherein, The installation through hole (211) includes a connected first hole section (211a) and a second hole section (211b), the inner diameter of the second hole section (211b) is smaller than the inner diameter of the first hole section (211a), the connection between the first hole section (211a) and the second hole section (211b) forms the installation step (212), and the second hole section (211b) is located on the side of the first hole section (211a) facing the inside of the connecting water pipe (10).

3. The heat exchanger according to claim 2, wherein, The outer diameter of the scale inhibitor cartridge (22) is smaller than the inner diameter of the second hole section (211b); the outer diameter of the limiting convex edge (222) is larger than the inner diameter of the second hole section (211b), and the outer diameter of the limiting convex edge (222) is smaller than the inner diameter of the first hole section (211a).

4. The heat exchanger according to claim 1, characterized in that, The scale inhibitor device (20) further includes a plug member (23), the installation through hole (211) has a thread, the plug member (23) can be threadedly connected in the installation through hole (211), the plug member (23) is used to block the installation through hole (211), the plug member (23) is located at the end of the installation through hole (211) and abuts against the limiting convex edge (222), and the plug member (23) can pre-tighten the limiting convex edge (222).

5. The heat exchanger according to claim 1, characterized in that, The scale inhibitor device (20) further includes a plug member (23), which is detachably connected to the installation joint (21), and the plug member (23) is used to block the installation through hole (211).

6. The heat exchanger according to claim 5, wherein, The installation through hole (211) has threads, and the plug member (23) can be threadedly connected into the installation through hole (211).

7. The heat exchanger according to claim 1, characterized in that, There are at least two of the connecting water pipes (10). The heat exchanger further includes a water system cleaning device (40), and the water system cleaning device (40) is internally connected to the heat exchanger through two of the installation joints (21). A cleaning circulation water path is formed among the interior of the heat exchanger, the scale inhibitor device (20), and the water system cleaning device (40).

8. The heat exchanger according to claim 1, characterized in that, The connecting water pipe (10) is the water inlet pipe or the water outlet pipe of the heat exchanger.

9. The heat exchanger according to claim 1 or 8, characterized in that, The heat exchanger is a shell-and-tube heat exchanger, which includes a shell side and a tube side. The shell side is for heat exchange on the water side, and the tube side is for heat exchange of the refrigerant. The connecting water pipe (10) is connected to the shell side.

10. A heat pump unit, characterized in that, A heat exchanger according to any one of claims 1 to 9 is included.

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