Waste heat recovery device of air compressor

Abstract

The utility model belongs to the technical field of air compressor equipment, and particularly relates to an air compressor waste heat recovery device which comprises a water tank, a water injection pipe is arranged at the top of the water tank, and a water drainage pipe is arranged at the bottom of the water tank. The gas guide pipe is arranged in the water tank in a coil shape; the first three-way valve is arranged at an air inlet of the air guide pipe; the second three-way valve is arranged at an air outlet of the air guide pipe; one end of the backflow air pipe is connected with the second three-way valve, and the other end is connected with the air inlet of the air guide pipe; the heat-conducting fin group is arranged on the air guide pipe and is distributed along the length direction of the air guide pipe; wherein a temperature sensor is arranged at the air outlet of the air guide pipe, the heat conduction fin set is composed of a plurality of heat conduction fins, and compared with the prior art, the air compressor waste heat recovery device can effectively improve the heat exchange efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compressor equipment, and in particular relates to a waste heat recovery device for an air compressor. Background Art

[0002] An air compressor is a mechanical device used to compress air into high-pressure gas to meet the demand for compressed air in various industrial and commercial applications. They are widely used in various fields such as manufacturing, construction sites, chemical plants, and the energy industry. Air compressors generate heat during operation, so effective measures need to be taken to manage the generated heat. For example, a waste heat recovery structure for an air compressor disclosed in the patent with application number CN202221483668.2 includes an air compressor body, a heat dissipation hole is provided on one side of the air compressor body, and the heat dissipation hole is provided in plurality, a hollow shell is fixedly connected to one side of the air compressor body, and the hollow shell is located on one side of the heat dissipation hole, a support plate is provided on the lower side of the hollow shell, and the support plate is fixedly connected to the air compressor body, a water storage tank is fixedly connected to the upper side of the support plate, a heat conduction pipe is provided inside the water storage tank, and the heat conduction pipe is fixedly connected to the hollow shell, and the heat conduction pipe is provided in plurality;

[0003] During use, the existing air compressor waste heat recovery device has low heat exchange efficiency and still leaves a large amount of heat that is not fully utilized, so it is necessary to make improvements. Utility Model Content

[0004] The purpose of the utility model is to provide an air compressor waste heat recovery device in view of the above-mentioned existing technical problems, so as to improve the heat exchange efficiency of the air compressor waste heat recovery device.

[0005] In view of this, the utility model provides an air compressor waste heat recovery device, comprising:

[0006] A water tank, wherein a water filling pipe is arranged at the top of the water tank, and a drainage pipe is arranged at the bottom of the water tank;

[0007] An air guide pipe, the air guide pipe is arranged in the water tank in a coil shape;

[0008] Also includes:

[0009] A first three-way valve, wherein the first three-way valve is arranged at the air inlet of the air guide pipe;

[0010] a second three-way valve, wherein the second three-way valve is arranged at the air outlet of the air guide pipe;

[0011] A return air pipe, one end of which is connected to the second three-way valve, and the other end of which is connected to the air inlet of the air guide pipe;

[0012] A heat-conducting fin group, wherein the heat-conducting fin group is arranged on the air duct and distributed along the length direction of the air duct;

[0013] Wherein, a temperature sensor is arranged at the air outlet of the air guide pipe, and the heat-conducting fin group is composed of a plurality of heat-conducting fins.

[0014] In the present technical solution, through the setting of the second three-way valve, the airflow carrying the waste heat of the air compressor passes through the air duct and exchanges heat with the water in the water tank and then flows to the air outlet of the air duct. The temperature sensor monitors the temperature of the airflow that has undergone heat exchange. When the air flow temperature is still high, the second three-way valve connects the air outlet of the air duct with the return air duct so that part of the airflow returns to the air inlet of the air duct, thereby improving the waste heat utilization efficiency. At the same time, the heat-conducting fin group can effectively improve the heat exchange efficiency between the air flow in the air duct and the water in the water tank, thereby further making full use of the waste heat of the air compressor. Moreover, through the control of the first three-way valve, the user can change the waste heat utilization method as needed. The waste heat of the air compressor can be directly discharged to other devices through the first three-way valve without passing through the air duct.

[0015] In the above technical solution, further, it also includes:

[0016] A steam pressure relief valve, which is arranged above the water tank and communicated with the interior of the water tank;

[0017] A pressure sensor is arranged in the water tank.

[0018] In the above technical solution, further, the heat conducting fins also include:

[0019] A fin body, wherein the cross section of the fin body is n-shaped, and the surface of the fin body is in a broken line shape;

[0020] Wherein, the inner end of the fin body extends to the inside of the air duct.

[0021] In the above technical solution, further, it also includes:

[0022] The filter pipe section is arranged on the drain pipe and is used for filtering the water discharged from the water tank.

[0023] In the above technical solution, further, the filtering pipe section also includes:

[0024] A first baffle plate, wherein the first baffle plate is arranged in the filter tube section, and a plurality of first water holes are arranged at the edge of the first baffle plate;

[0025] A second baffle plate, wherein the second baffle plate is arranged on the outer side of the first baffle plate, and a second water hole is arranged at the center of the second baffle plate;

[0026] A filter screen plate, wherein the filter screen plate is arranged on the outer side of the second baffle plate;

[0027] The filter medium is filled and arranged between the first baffle plate, the second baffle plate and the filter mesh plate.

[0028] The beneficial effects of the utility model are:

[0029] 1. The second three-way valve and the return air pipe are used to improve the utilization efficiency of the air compressor waste heat. At the same time, the heat-conducting fin group can effectively improve the heat exchange efficiency between the air flow in the air pipe and the water in the water tank, thereby further making full use of the waste heat of the air compressor;

[0030] 2. The heat exchange efficiency between the waste heat of the air compressor and water can be effectively improved by setting the heat-conducting fin group;

[0031] 3. The setting of the filter pipe section can effectively filter out impurities such as scale contained in the water, making it convenient for the water in the water tank to be directly discharged for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 It is a schematic structural diagram of a specific implementation method of the utility model.

[0034] Figure 2 It is a side view structural schematic diagram of the utility model.

[0035] Figure 3 It is a schematic diagram of the cross-sectional structure of the water tank of the utility model.

[0036] Figure 4 This is a schematic diagram of the structure of the heat-conducting fin group of the utility model.

[0037] Figure 5 This is a schematic diagram of the structure of the filter pipe section of the utility model.

[0038] The symbols in the figure are:

[0039] 1. Water tank; 2. Water filling pipe; 3. Drain pipe; 4. Air duct; 5. First three-way valve; 6. Second three-way valve; 7. Return air duct; 8. Heat transfer fin group; 9. Heat transfer fin; 90. Fin body; 10. Steam pressure relief valve; 11. Filter pipe section; 12. First baffle plate; 13. First water hole; 14. Second baffle plate; 15. Second water hole; 16. Filter screen; 17. Filter medium. DETAILED DESCRIPTION

[0040] 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 of 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.

[0041] In the description of the present application, 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. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0042] Embodiment 1:

[0043] The embodiment of the present application provides an air compressor waste heat recovery device, comprising: a water tank 1, a water injection pipe 2 is arranged at the top of the water tank 1, a drainage pipe 3 is arranged at the bottom of the water tank 1; an air guide pipe 4, the air guide pipe 4 is arranged in the water tank 1 in a coil shape;

[0044] It also includes: a first three-way valve 5, which is arranged at the air inlet of the air duct 4; a second three-way valve 6, which is arranged at the air outlet of the air duct 4; a return air duct 7, one end of the return air duct 7 is connected to the second three-way valve 6, and the other end is connected to the air inlet of the air duct 4; a group of heat-conducting fins 9 8, which are arranged on the air duct 4 and distributed along the length direction of the air duct 4;

[0045] Wherein, a temperature sensor is arranged at the air outlet of the air guide pipe 4, and the heat conducting fin group 9 8 is composed of a plurality of heat conducting fin groups 9 8.

[0046] Moreover, the air inlet of the air duct 4 is connected to the heat exhaust of the air compressor through the first three-way valve 5. The first three-way valve 5 and the second three-way valve 6 can be electrically controlled valves and are electrically connected to the control unit of the air compressor. The temperature sensor is also electrically connected to the control unit of the air compressor. The return air pipe 7 can also be connected to the second three-way valve 6 at one end, and the other end extends to the water tank 1 and is also distributed in a coil shape, and finally extends to the outside of the water tank 1 to discharge gas. Electrically controlled valves are installed on the drain pipe 3 and the water injection pipe 2.

[0047] In this embodiment, through the setting of the second three-way valve 6, the airflow carrying the waste heat of the air compressor passes through the air duct 4 to exchange heat with the water in the water tank 1 and then flows to the air outlet of the air duct 4. The temperature sensor monitors the temperature of the airflow that has undergone heat exchange. When the air flow temperature is still high, the second three-way valve 6 connects the air outlet of the air duct 4 with the return air duct 7 so that part of the airflow returns to the air inlet of the air duct 4, thereby improving the waste heat utilization efficiency. At the same time, the heat-conducting fins 9 group 8 can effectively improve the heat exchange efficiency between the air flow in the air duct 4 and the water in the water tank 1, thereby further making full use of the waste heat of the air compressor. By controlling the first three-way valve 5, the user can change the waste heat utilization method according to needs. The waste heat of the air compressor can be directly discharged to other devices through the first three-way valve 5 without passing through the air duct 4.

[0048] Embodiment 2:

[0049] The present embodiment provides an air compressor waste heat recovery device, which, in addition to the technical solutions of the above embodiments, also has the following technical features, including: a steam pressure relief valve 10, which is arranged above the water tank 1 and connected to the inside of the water tank 1; a pressure sensor, which is arranged in the water tank 1.

[0050] Moreover, the steam pressure relief valve 10 can be a conventional manual valve or a conventional electrically controlled valve electrically connected to the air compressor control unit, the pressure sensor is electrically connected to the air compressor control unit, and the steam pressure relief valve 10 can be connected to a conventional steam generator.

[0051] In this embodiment, when the water in the water tank 1 is heated, the water generates steam as the temperature rises, and the pressure sensor senses the pressure change in the water tank 1. The user can manually open the steam pressure relief valve 10 to discharge the steam according to the pressure feedback. The discharged steam acts on the steam generator to generate electricity. The steam pressure relief valve 10 can also automatically discharge steam after the pressure in the water tank 1 reaches a set value. Compared with the prior art, the utility model can further utilize the waste heat of the air compressor to generate electricity, thereby improving the utilization effect of the waste heat of the air compressor.

[0052] Embodiment 3:

[0053] This embodiment provides an air compressor waste heat recovery device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: the heat-conducting fin 9 also includes: a fin body 90, the cross section of the fin body 90 is n-shaped, and the surface of the fin body 90 is in a broken line shape;

[0054] The inner end of the fin body 90 extends to the inside of the air duct 4 .

[0055] In this embodiment, the provision of the heat-conducting fins 9 can effectively increase the heat exchange area between water and the waste heat of the air compressor, thereby effectively improving the heat exchange efficiency between the waste heat of the air compressor and water, so that the heat carried in the air flow can be quickly and fully transferred to the water in the water tank 1, and the inner end of the fin body 90 extends to the interior of the air guide pipe 4, which can further accelerate the transfer of heat in the air flow to the water, further improving the heat exchange efficiency between the waste heat and water.

[0056] Embodiment 4:

[0057] This embodiment provides an air compressor waste heat recovery device, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and also includes: a filter pipe section 11, which is arranged on the drain pipe 3 to filter the water discharged from the water tank 1.

[0058] The filter pipe section 11 also includes: a first baffle plate 12, which is arranged in the filter pipe section 11, and a plurality of first water holes 13 are arranged at the edge of the first baffle plate 12; a second baffle plate 14, which is arranged on the outside of the first baffle plate 12, and a second water hole 15 is arranged at the center of the second baffle plate 14; a filter mesh plate 16, which is arranged on the outside of the second baffle plate 14; and a filter medium 17, which is filled and arranged between the first baffle plate 12, the second baffle plate and the filter mesh plate 16.

[0059] Moreover, the filter medium 17 can be a conventional water filter medium 17 such as filter sand, filter cotton, etc.

[0060] In this embodiment, when the drain pipe 3 is draining water, the water in the water tank 1 enters the filter pipe section 11. When the water moves to the first baffle plate 12, it is blocked and enters between the second baffle plate 14 and the first baffle plate 12 through a plurality of first water holes 13. During the flow of water here, the water is filtered once by the filter medium 17. Then the water moves to the second water hole 15 and flows through the second water hole 15 to between the second baffle plate 14 and the filter mesh plate 16. When the water flows here, it is filtered for the second time by the filter medium 17. Finally, the water flows out of the filter pipe section 11 through the filter mesh plate 16 and is discharged. Compared with the prior art, the utility model improves the effective filtering stroke of water by setting the first baffle plate 12 and the second baffle plate 14, and filters the water multiple times, thereby improving the filtering effect of water, so that the water in the water tank 1 can be directly discharged and used.

[0061] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. An air compressor waste heat recovery device, comprising: A water tank (1), wherein a water injection pipe (2) is arranged at the top of the water tank (1), and a drainage pipe (3) is arranged at the bottom of the water tank (1); An air guide pipe (4), the air guide pipe (4) being arranged in a coil shape inside the water tank (1); It is characterized by further comprising: a first three-way valve (5), the first three-way valve (5) being arranged at the air inlet of the air guide pipe (4); a second three-way valve (6), the second three-way valve (6) being arranged at the air outlet of the air guide pipe (4); A return air pipe (7), one end of the return air pipe (7) being connected to the second three-way valve (6), and the other end of the return air pipe (7) being connected to the air inlet of the air guide pipe (4); A heat-conducting fin group (8), wherein the heat-conducting fin group (8) is arranged on the air guide pipe (4) and distributed along the length direction of the air guide pipe (4); Wherein, a temperature sensor is provided at the air outlet of the air guide pipe (4), and the heat conducting fin group (8) is composed of a plurality of heat conducting fins (9).

2. The air compressor waste heat recovery device according to claim 1, characterized in that: Also includes: a steam pressure relief valve (10), the steam pressure relief valve (10) being arranged above the water tank (1) and being in communication with the interior of the water tank (1); A pressure sensor, wherein the pressure sensor is arranged in the water tank (1).

3. The air compressor waste heat recovery device according to claim 2, characterized in that: The heat conducting fin (9) further comprises: A fin body (90), wherein the cross section of the fin body (90) is n-shaped, and the surface of the fin body (90) is in a broken line shape; Wherein, the inner end of the fin body (90) extends to the interior of the air guide tube (4).

4. The air compressor waste heat recovery device according to claim 3, characterized in that: Also includes: A filter pipe section (11), wherein the filter pipe section (11) is arranged on the drainage pipe (3) and is used for filtering water discharged from the water tank (1).

5. The air compressor waste heat recovery device according to claim 4, characterized in that: The filtering pipe section (11) further comprises: A first baffle plate (12), the first baffle plate (12) being arranged in the filter pipe section (11), and a plurality of first water holes (13) being arranged at the edge of the first baffle plate (12); a second baffle plate (14), the second baffle plate (14) being arranged outside the first baffle plate (12), and a second water passage hole (15) being arranged at the center of the second baffle plate (14); A filter screen plate (16), wherein the filter screen plate (16) is arranged on the outside of the second baffle plate (14); A filter medium (17) is filled and arranged between the first baffle plate (12), the second baffle plate and the filter mesh plate (16).

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