Gas cooler of air compressor

Abstract

The utility model discloses an air compressor gas cooler which comprises an integrally formed cooler body, the cooler body comprises a front end plate, a rear end plate and heat exchange fins, the rear end plate is also used as a crankcase end cover, and the heat exchange fins are arranged between the front end plate and the rear end plate. An air inlet hole and an air outlet hole which penetrate through the front end plate and the rear end plate are formed in the cooler body, a compressed airflow channel penetrating through the heat exchange fins is further formed in the cooler body, and the compressed airflow channel communicates with the air inlet hole and the air outlet hole. And at least part of the compressed gas channel adopts frustum structures which are communicated with one another. The cooler main body is integrally formed, the rear end plate is also used as a crankcase end cover, the design is simplified, one plate has multiple purposes, the structure is compact, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of air compressors, in particular to a gas cooler for an air compressor. Background Art

[0002] The air compressor generates a large amount of heat during the air compression process, which increases the temperature of the discharged gas. In particular, in a multi-stage air compressor, excessively high air temperature between stages will make it difficult for the gas to be compressed. Specifically, during the first-stage compression process, the low-pressure cylinder piston directly contacts and rubs against the inner wall of the piston cylinder body to generate a large amount of heat, which increases the temperature of the first-stage compressed air. The high-temperature first-stage compressed air directly enters the high-pressure chamber through the cylinder head vent for secondary compression. The high temperature causes the first-stage compressed air to expand in volume. The cylinder head is cooled by an external fan, which makes it difficult for the air to be compressed during the secondary compression, and it is impossible to effectively cool the first-stage compressed gas. In order to solve the above problems, Chinese patent document CN214366591U discloses a cooler for an oil-free air compressor and an oil-free air compressor, which includes a cooling box, an air inlet and an air outlet are formed on the cooling box, and part of the side wall of the cooling box is composed of a cooling chip, and an air channel is formed in the cooling chip, and the air channel is connected to the air inlet and the air outlet; the air inlet is connected to the low-pressure exhaust port, and the air outlet is connected to the high-pressure air inlet. In the above structure, the air inlet is connected to the low-pressure exhaust port, and the air outlet is connected to the high-pressure air inlet. The gas discharged from the low-pressure exhaust port after the first-stage compression enters from the air inlet, passes through the air channel in the cooling chip, and is discharged from the air outlet to enter the high-pressure air inlet of the high-pressure compression chamber. The cooling chip cools and exchanges heat for the first-stage compressed gas passing through the air channel, which has a cooling effect on the first-stage compressed gas, which is beneficial for the subsequent second-stage compression. Although the above cooler structure can have a cooling effect on the first-stage compressed gas, the applicant has found that the above cooler structure can be further optimized and obtain positive effects. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an air compressor gas cooler, including an integrally formed cooler body, the cooler body including a front end plate, a rear end plate also serving as a crankcase end cover, and heat exchange fins between the front end plate and the rear end plate; the cooler body is formed with an air inlet and an air outlet penetrating the front end plate and the rear end plate, the air inlet is connected to the low-pressure exhaust port, and the air outlet is connected to the high-pressure air inlet; the cooler body is also formed with a compressed air flow channel penetrating the heat exchange fin, the compressed air flow channel is connected to the air inlet and the air outlet; the compressed gas channel at least partially adopts an interconnected frustum structure. The cooler body is integrally formed, and the rear end plate is also used as the crankcase end cover, which simplifies the design, uses one plate for multiple purposes, makes the structure compact, and reduces the cost; at the same time, the compressed gas channel is set as an interconnected frustum structure, which increases the heat exchange area and improves the heat exchange efficiency compared with the existing straight-cylinder structure. At the same time, in the integrally formed manufacturing, the frustum structure is more conducive to demolding and convenient manufacturing.

[0004] In one embodiment, a first mounting hole and a second mounting hole are also formed on the cooler body, and the compressed air flow channel is divided into three parts, respectively connecting the air inlet hole and the first mounting hole, the first mounting hole and the second mounting hole, and the second mounting hole and the air outlet hole.

[0005] In one embodiment, the compressed air flow channel between the air inlet and the first mounting hole and the compressed air flow channel between the second mounting hole and the air outlet are arranged close to the front end plate, and the compressed air flow channel between the first mounting hole and the second mounting hole is arranged close to the rear end plate. By refining the direction of the compressed air flow channel, it is close to a U-shaped design, but this structure increases the length of the compressed air flow channel and improves the heat exchange effect.

[0006] In one embodiment, the upper end surface and the lower end surface of each heat exchange fin form a rib structure, which increases the heat exchange area and improves the heat exchange efficiency compared with the plate heat exchange fin.

[0007] In one embodiment, the rib structures between two adjacent heat exchange fins are arranged in a staggered manner, so as to effectively utilize the heat exchange space, increase the heat exchange area as much as possible, and improve the heat exchange efficiency.

[0008] In one embodiment, the upper end surface and / or the lower end surface of each heat exchange fin is arranged to be inclined from inside to outside. This structure makes the air flow channel between the heat exchange fins present an eight-shaped arrangement, increases the heat exchange area, and further improves the heat exchange efficiency; at the same time, this structure facilitates dust discharge to the outside and prevents dust from accumulating inside.

[0009] In one embodiment, mesh ribs are formed on the end surface of the rear end plate close to the crankcase. By providing the mesh ribs, a spoiler and silencer structure is formed, thereby reducing the noise output of the air compressor.

[0010] In one embodiment, the mesh ribs include scattering mesh ribs and connecting mesh ribs connecting the scattering mesh ribs. Further, by constructing the scattering mesh ribs and connecting mesh ribs, a structural design of the mesh ribs and mesh grooves between the mesh ribs is formed, which further improves the effect of achieving spoiler silencing. Furthermore, the mesh ribs can also play a role in increasing the strength of the rear end plate.

[0011] In one embodiment, a reinforcing rib is formed on the end surface of the rear end plate away from the crankcase. By providing the reinforcing rib, the strength of the rear end plate is increased.

[0012] In one embodiment, a mesh cover is provided on the front end plate; preferably, a cooling fan is provided on the rear end plate; preferably, a cylinder head cooling channel is formed on the cooler body near the cylinder head; preferably, a wire harness crossbeam is formed on the cylinder head cooling channel. By forming a cylinder head cooling channel, part of the wind from the cooling fan is blown to the cylinder head, which can play a role in reducing the temperature of the cylinder head. By providing a wire harness crossbeam, the wire harness of the cooling fan can be arranged along the wire harness crossbeam and then led out of the cooler. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the following is a brief introduction to the drawings required for use in the specific implementation modes. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0014] Figure 1 It is a structural schematic diagram of an air compressor gas cooler of the utility model;

[0015] Figure 2 It is a schematic diagram of the installation structure of the air compressor gas cooler of the utility model;

[0016] Figure 3 It is a cross-sectional structural schematic diagram of an air compressor gas cooler (with wiring harness) of the utility model;

[0017] Figure 4 yes Figure 3 Schematic diagram of the structure in the middle AA direction (without cooling fan);

[0018] Figure 5 It is a structural schematic diagram of the air compressor gas cooler of the utility model in the direction from the rear end plate to the front end plate;

[0019] The reference numerals in the figure are as follows: 1-front end plate; 2-rear end plate; 3-heat exchange fins; 4-air inlet; 5-air outlet; 6-compressed air flow channel; 7-first mounting hole; 8-second mounting hole; 9-barbed rib structure; 10-grid rib; 11-scattering grid rib; 12-connecting grid rib; 13-reinforcement rib; 14-mesh cover; 15-cooling fan; 16-cylinder head cooling channel; 17-wiring harness crossbeam; 18-air duct sealing port; 19-crankcase; 20-wiring harness. DETAILED DESCRIPTION

[0020] The following is a clear and complete description of the contents of the utility model in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, but not all of the embodiments. The embodiments in the utility model and other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Example 1

[0025] like Figure 1-5As shown, the present embodiment discloses an air compressor gas cooler, which includes an integrally formed cooler body, such as an integral high-pressure casting, the cooler body includes a front end plate 1, a rear end plate 2 which also serves as an end cover of a crankcase 19, and heat exchange fins 3 between the front end plate 1 and the rear end plate 2. The structure of the heat exchange fins is not specifically limited. In the present embodiment, the heat exchange fins 3 are a structure group arranged up and down and left and right, that is, a plurality of heat exchange fins 3 are arranged between the front end plate 1 and the rear end plate 2; an air inlet 4 and an air outlet 5 which penetrate the front end plate 1 and the rear end plate 2 are formed on the cooler body, and the air inlet 4 and the air outlet 5 which penetrate the front end plate 1 and the rear end plate 2 are formed on the cooler body. Hole 4 is connected to the low-pressure exhaust port, which is the exhaust port of the first-stage compressed air after being compressed by the low-pressure cylinder. The air outlet hole 5 is connected to the high-pressure air inlet, which refers to the air inlet of the high-pressure cylinder. The cooler body is also formed with a compressed air flow channel 6 that runs through the heat exchange fins 3. The compressed air flow channel 6 connects the air inlet hole 4 and the air outlet hole 5, that is, the air that has undergone the first-stage compression passes through the low-pressure exhaust port, the air inlet hole 4, the compressed air flow channel, the air outlet hole 5, and the high-pressure air inlet, and then enters the high-pressure cylinder for secondary compression or higher-level compression. After the air passes through the heat exchange of the heat exchange fins 3, it enters the high-pressure cylinder. The side wall of the air inlet hole 4, the side wall of the air outlet hole 5, and the side wall of the compressed air flow channel 6 are integrally formed with the cooler body. The compressed gas channel 6 at least partially adopts a mutually connected frustum structure.

[0026] Specifically, the cooler body is preferably close to a square shape, the air inlet 4 and the air outlet 5 are located at the upper position of the cooler body, a low-pressure exhaust port and a high-pressure air inlet are formed on the crankcase, and the port positions of the low-pressure exhaust port and the high-pressure air inlet are formed with internal threads; a first mounting hole 7 and a second mounting hole 8 are also formed on the cooler body, and correspondingly, a threaded hole is formed on the crankcase, and the first mounting hole 7 and the second mounting hole 8 are formed at the lower position of the cooler body; in the above structure, the compressed air flow channel 6 is divided into three parts, which respectively connect the air inlet 4 and the first mounting hole 7, the first mounting hole 7 and the second mounting hole 8, and the second mounting hole 8 and the air outlet 5.

[0027] In one embodiment, the compressed air flow channel between the air inlet 4 and the first mounting hole 7 and the compressed air flow channel between the second mounting hole 8 and the air outlet 5 are arranged close to the front end plate 1, and the compressed air flow channel between the first mounting hole 7 and the second mounting hole 8 is arranged close to the rear end plate 2. In the above structure, each part of the compressed air flow channel adopts a double-cone structure with small heads connected. With this structure, it is convenient to disassemble the mold during one-piece molding, and at the same time, it can also increase the heat exchange area of ​​the compressed air flow channel. Specifically, after each part of the compressed air flow channel is manufactured, openings will be formed at both ends, namely the airway sealing port 18 in the figure. When in use, it needs to be sealed, specifically, by a plug sealing process.

[0028] In one embodiment, the upper and lower end surfaces of each heat exchange fin 3 form a rib structure 9, and the structure of the rib structure 9 is not specifically limited, as long as it is a convex structure. Preferably, the rib structure 9 between two adjacent heat exchange fins 3 is staggered. More preferably, Figure 4 As shown, the upper end surface and / or the lower end surface of each heat exchange fin 3 is arranged to be inclined from the inside to the outside, so that the gap between two adjacent heat exchange fins 3 is arranged to be expanded.

[0029] In one embodiment, a mesh rib 10 is formed on the end face of the rear end plate close to the crankcase. The structure of the mesh rib 10 is not specifically limited. Specifically, Figure 5 As shown, the mesh ribs 10 include scattering mesh ribs 11 and connecting mesh ribs 12 connecting the scattering mesh ribs 11. The structure of the connecting mesh ribs 12 is not specifically limited. Figure 5 As shown, the connecting grid ribs 12 are preferably circular structures with two circles; the connection points or center points of the scattering grid ribs 11 can be expanded to form a sheet. A plurality of grid groove structures are formed between the scattering grid ribs 11 and the connecting grid ribs 12, and the grid groove structures are not limited to chicken legs and can be surrounded by the two.

[0030] In one embodiment, reinforcing ribs 13 are formed on the end surface of the rear end plate away from the crankcase. The structure of the reinforcing ribs 13 is not specifically limited. Of course, a grid groove structure can also be formed between the reinforcing ribs. The grid groove structure can also play a role in disturbing and silencing the airflow of the cooling fan.

[0031] The front end plate 1 forms an opening, and the opening is covered by the mesh cover 14; a cooling fan 15 is installed on the rear end plate 2, and the specific installation method is not specifically limited. For example, a mounting hole is set and fixed with fixing bolts; a cylinder head cooling channel 16 is formed on the cooler body near the cylinder head, specifically, the cylinder head cooling channel 16 is formed between the air inlet 4 and the air outlet 5; a wiring harness crossbeam 17 is formed on the cylinder head cooling channel 16, specifically formed between the front end plate 1 and the rear end plate 2, and an opening is formed thereon, and an opening is formed on the front end plate 1, so that the wiring harness 20 of the cooling fan can bypass the opening and be led out of the cooler.

[0032] The cooler is installed as follows: the cooler is fixed to the end of the crankcase 19 by a hollow bolt or a breather bolt.

[0033] The use process of the utility model is as follows:

[0034] After the air compressor is installed, it is started, and the first-stage compressed gas in the low-pressure cylinder enters the high-pressure cylinder through the low-pressure exhaust port, the vent bolt, the air inlet, the compressed air flow channel (including the first mounting hole, the second mounting hole and / or the vent bolt), the air outlet, the vent bolt, and the high-pressure air inlet. During this process, the cooling fan continuously blows air for heat exchange and cooling.

[0035] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An air compressor gas cooler, characterized in that: It comprises an integrally formed cooler body, the cooler body comprising a front end plate, a rear end plate which also serves as a crankcase end cover, and heat exchange fins between the front end plate and the rear end plate; an air inlet and an air outlet which pass through the front end plate and the rear end plate are formed on the cooler body, the air inlet is connected to the low-pressure exhaust port, and the air outlet is connected to the high-pressure air inlet; a compressed air flow channel which passes through the heat exchange fins is also formed on the cooler body, the compressed air flow channel is connected to the air inlet and the air outlet; the compressed air flow channel at least partially adopts a mutually connected frustum structure.

2. The air compressor gas cooler according to claim 1, characterized in that: A first mounting hole and a second mounting hole are also formed on the cooler body, and the compressed air flow channel is divided into three parts, which respectively connect the air inlet hole and the first mounting hole, the first mounting hole and the second mounting hole, and the second mounting hole and the air outlet hole.

3. The air compressor gas cooler according to claim 2, characterized in that: The compressed air flow channel between the air inlet hole and the first mounting hole and the compressed air flow channel between the second mounting hole and the air outlet hole are arranged close to the front end plate, and the compressed air flow channel between the first mounting hole and the second mounting hole is arranged close to the rear end plate.

4. The air compressor gas cooler according to any one of claims 1 to 3, characterized in that: The upper end surface and the lower end surface of each heat exchange fin form a rib structure.

5. The air compressor gas cooler according to claim 4, characterized in that: The rib structures between two adjacent heat exchange fins are arranged in a staggered manner.

6. The air compressor gas cooler according to any one of claims 1 to 3, characterized in that: The upper end surface and / or the lower end surface of each heat exchange fin is arranged to be inclined from inside to outside.

7. The air compressor gas cooler according to claim 1, characterized in that: Grid ribs are formed on the end surface of the rear end plate close to the crankcase.

8. The air compressor gas cooler according to claim 7, characterized in that: The grid ribs include scattering grid ribs and connecting grid ribs connecting the scattering grid ribs.

9. The air compressor gas cooler according to claim 1, characterized in that: A reinforcing rib is formed on the end surface of the rear end plate away from the crankcase.

10. The air compressor gas cooler according to claim 1, characterized in that The front end plate is provided with a mesh cover; preferably, the rear end plate is provided with a cooling fan; preferably, a cylinder head cooling channel is formed on the cooler body at a position close to the cylinder head; preferably, a wiring harness crossbeam is formed on the cylinder head cooling channel.

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