Thermoelectric power generation device

Abstract

The thermoelectric power generation device is assembled with an oil tank flange of a lubricating oil system matched with a compressor and comprises a flange plate, a plurality of heat conduction copper pipes are arranged on one side of the flange plate, a power generation assembly and a fan assembly are arranged on the other side of the flange plate, the heat conduction copper pipes are inserted into an oil tank, and the power generation assembly and the fan assembly are arranged outside the oil tank. The power generation assembly comprises a heat conduction block arranged on the flange plate, a plurality of temperature difference power generation pieces arranged on the heat conduction block and a heat dissipation block covering the temperature difference power generation pieces, the temperature difference power generation pieces are connected with the fan assembly, and the temperature difference between high-temperature oil in the oil tank and the outside of the oil tank drives the power generation assembly to generate power to drive the fan assembly to work. Cold air is continuously sucked, and the oil temperature in the oil tank is reduced. The oil tank waste heat recovery device is simple in structure, waste heat of the oil tank can be recovered through the temperature difference between the working oil temperature and the environment temperature, oil liquid is prevented from being oxidized, and application of novel energy is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to compressor technical field, and specifically relates to a thermoelectric power generation device. BACKGROUND

[0002] In the lubricating oil system matched with the electric drive compressor unit, the temperature control of the ISO VG46 lubricating oil excessively depends on the cooling performance of the heat exchanger. The oil tank is used for providing lubricating oil for lubricating and cooling the compressor bearing, the compressor gear pair and the motor bearing, and the temperature of the lubricating oil in the oil tank is kept at about 70 DEG C during normal operation of the unit. The design performance of the existing heat exchanger is low, and the lubricating oil at high temperature can cause a series of hazards such as reduction of smooth oil film strength, acceleration of mechanical wear, poor sealing performance, generation of carbide and sludge, acceleration of oil oxidation and oil quality deterioration, so that the process requirements cannot be met, and more energy or equipment is needed, thereby increasing the production cost. If the design of the heat exchanger is too conservative, the equipment selection specification is increased, more installation and maintenance space is occupied, and unnecessary investment and maintenance cost is increased. SUMMARY

[0003] In order to make up for the deficiency of the prior art, the utility model provides a thermoelectric power generation device to solve the problem of overheating of the oil liquid in the oil tank of the lubricating oil system of the centrifugal compressor during operation.

[0004] The thermoelectric power generation device is assembled with the oil tank flange of the lubricating oil system matched with the compressor, and comprises a flange plate, a plurality of heat-conducting copper pipes are arranged on one side of the flange plate, a power generation assembly and a fan assembly are arranged on the other side of the flange plate, the heat-conducting copper pipes are inserted into the oil tank, and the power generation assembly and the fan assembly are arranged outside the oil tank. The power generation assembly comprises a heat-conducting block arranged on the flange plate, a plurality of thermoelectric power generation sheets arranged on the heat-conducting block and a heat dissipation block covering the thermoelectric power generation sheets, the thermoelectric power generation sheets are connected with the fan assembly through wires, the high-temperature oil liquid in the oil tank and the temperature difference outside the oil tank drive the power generation assembly to generate electricity and drive the fan assembly to work, cold air is continuously sucked, and the oil temperature in the oil tank is reduced.

[0005] Further, a plurality of heat-conducting copper pipes are circumferentially arranged on the flange plate, one end of the heat-conducting copper pipe is fixed with the flange plate, and a plurality of heat-conducting copper pipes are cooperatively bound through connecting pieces.

[0006] Further, the fan assembly comprises a hollow protective cover and a fan, and the fan is fixed on the protective cover through an outer ventilation cover and an inner ventilation cover.

[0007] Further, one end of the protective cover covers the power generation assembly and is fixed with the flange plate, and the other end is provided with an outer ventilation cover; a plurality of ventilation grooves are arranged on the end of the protective cover close to the flange plate.

[0008] Furthermore, a plurality of the ventilation slots are circumferentially and axially arranged on the protective cover, and the ventilation slots are long slots.

[0009] Furthermore, a plurality of heat dissipation holes are provided on the heat dissipation block.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] (1) The present application has a simple structure and does not rely too much on the use of an oil-cooled heat exchanger to increase the design cost of the piping system and the investment in site space. It only needs to rely on environmental conditions and utilize semiconductor thermoelectric power generation chips to work. It is small in size, easy to arrange, and easy to maintain, saving electricity resources and labor maintenance costs.

[0012] (2) The temperature difference between the working oil temperature and the ambient temperature can be used to recover the waste heat in the oil tank and prevent the oil from being oxidized. This is a new type of energy application. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is an internal cross-sectional view of the utility model;

[0015] Figure 3 This is the separation diagram of the utility model (excluding the protective cover);

[0016] Figure 4 This is an internal cross-sectional view of the utility model (excluding the protective cover).

[0017] In the figure: 1- flange, 2- heat-conducting copper tube, 3- power generation component, 31- heat-conducting block, 32- temperature difference power generation sheet, 33- heat dissipation block, 4- fan assembly, 41- protective cover, 42- fan, 43- outer ventilation cover, 44- inner ventilation cover, 5- connector. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the present invention is further described below with reference to the accompanying drawings.

[0019] like Figures 1-4The embodiment shown is a thermoelectric power generation device, which is assembled with the oil tank flange of the lubricating oil system of the compressor, including a flange plate 1 fixed to the flange pipe mouth of the oil tank, a plurality of heat-conducting copper tubes 2 are arranged on one side of the flange plate 1, and a power generation component 3 and a fan component 4 are arranged on the other side. The heat-conducting copper tubes 2 are inserted into the oil tank, and the power generation component 3 and the fan component 4 are placed outside the oil tank; the power generation component 3 includes a heat-conducting block 31 arranged on the flange plate 1, a plurality of thermoelectric power generation sheets 32 arranged on the heat-conducting block 31, and a heat dissipation block 33 covering the thermoelectric power generation sheets 32, and a plurality of heat dissipation holes are arranged on the heat dissipation block 33; the wires of the plurality of thermoelectric power generation sheets 32 are connected in series and laid flat on the heat dissipation block 33, and the series-connected thermoelectric power generation sheets 32 are connected to the wires of the fan component 4. The temperature difference between the high-temperature oil in the oil tank and the outside of the oil tank drives the power generation component 3 to generate electricity and drive the fan component 4 to work, continuously inhaling cold air to reduce the oil temperature in the oil tank. Specifically, a plurality of heat-conducting copper tubes 2 are arranged circumferentially on the flange 1 , one end of the heat-conducting copper tube 2 is fixed to the flange 1 , and the plurality of heat-conducting copper tubes 2 are bundled together by a connector 5 .

[0020] In the present application, the fan assembly 4 includes a hollow protective cover 41 and a fan 42. The fan 42 is fixed to the protective cover 41 through an outer ventilation cover 43 and an inner ventilation cover 44. One end of the protective cover 41 covers the power generation assembly 3 and is fixed to the flange 1, and the other end is provided with an outer ventilation cover 43. The end of the protective cover 41 close to the flange 1 is provided with a plurality of ventilation slots 11. The plurality of ventilation slots 11 are circumferentially and axially arranged on the protective cover 41, and the ventilation slots 11 are long slots. In this embodiment, the protective cover 41 includes an integrally arranged cover tube 1 411 and a cover tube 2 412. The inner diameter of the cover tube 1 411 is larger than the inner diameter of the cover tube 2 412. The cover tube 1 411 and the cover tube 2 412 are coaxially arranged. Therefore, a retaining ring 413 is formed at the connection between the cover tube 1 411 and the cover tube 2 412. The inner ventilation cover 44 is fixed to the retaining ring 413. The inner ventilation cover 44 is arranged at the end of the cover tube 1 411 away from the cover tube 2 412. The ventilation slots 11 are circumferentially arranged on the annular sidewall of the second cover tube 412. The flange 1 and the flange pipe opening of the oil tank, the flange 1 and the protective cover 41 and other components are connected by fasteners, which are fastening screws or fastening bolts.

[0021] It can be understood that the power generation component 3 is an electric drive module, the fan component 4 is a refrigeration module, the hot end of the temperature difference power generation plate 32 is fixed to the heat conduction block 31, and the cold end is close to the heat dissipation block 33, that is, the heat conduction copper tube 2 at the hot end is immersed in the oil through the flange pipe mouth of the oil tank, and the electric drive fan 42 is arranged at the cold end to inhale air and dissipate heat through the ventilation slot 11.

[0022] The lubricating oil in the compressor forms an oil film on the bearing pads and meshing tooth surfaces, ensuring adequate lubrication between the relatively moving parts. It also removes heat and metal particles generated by friction between the moving parts. The oil then returns to the oil tank through the return line, where it settles and dissipates heat before being pumped out again by the oil pump to enter a new oil cycle. After the compressor returns to a tank temperature of approximately 70°C, the heat-conducting copper tube 2 is immersed in the tank to absorb heat, forming a high-temperature end that mates with the hot end of the thermoelectric generator 32. The other end of the thermoelectric generator 32 is exposed to the air (room temperature is approximately 25°C) as the cold end. Utilizing the Seebeck effect, the heat-conducting copper tube 2 is embedded in the tank to absorb heat, serving as the hot end. The electricity generated by the semiconductor thermoelectric generator 32, consisting of multiple PN junctions connected in series, drives the fan 42 for air cooling. In this embodiment, the specific model of the thermoelectric chip is preferably SP1848-27145 150 degrees 40*40mm high thermal conductivity thermoelectric power generation chip, which can drive the fan in the refrigeration module with a voltage of 3V~5V and a power of 450W~830W within the temperature difference range of 30℃ to 50℃.

[0023] This application utilizes the temperature difference between the oil in the tank and the ambient temperature to generate electricity and provide fan cooling. This cooling module utilizes the temperature difference between the working oil temperature inside the tank and the ambient temperature outside the tank to recover waste heat from the tank. A heat-conducting copper tube 2 and a flange 1 form an immersed heat-conducting core. This core (heat-conducting copper tube 2) is isolated from the hot oil. When replacing it, there's no need to drain the oil in the tank; simply remove the heat-conducting core and replace it with a new one, making maintenance easy.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A thermoelectric power generation device, assembled with the oil tank flange of the lubricating oil system of the compressor, characterized in that: The invention comprises a flange (1), a plurality of heat-conducting copper tubes (2) are arranged on one side of the flange (1), and a power generation assembly (3) and a fan assembly (4) are arranged on the other side. The heat-conducting copper tubes (2) are plugged into the oil tank, and the power generation assembly (3) and the fan assembly (4) are placed outside the oil tank. The power generation assembly (3) comprises a heat-conducting block (31) arranged on the flange (1), a plurality of temperature difference power generation sheets (32) arranged on the heat-conducting block (31), and a heat dissipation block (33) covering the temperature difference power generation sheets (32). The temperature difference power generation sheets (32) are connected to the fan assembly (4) by wires. The temperature difference between the high-temperature oil in the oil tank and the outside of the oil tank drives the power generation assembly (3) to generate electricity and drive the fan assembly (4) to work, continuously inhaling cold air and reducing the oil temperature in the oil tank.

2. A thermoelectric power generation device according to claim 1, characterized in that: The plurality of heat-conducting copper tubes (2) are circumferentially arranged on the flange (1), one end of the heat-conducting copper tube (2) is fixed to the flange (1), and the plurality of heat-conducting copper tubes (2) are bundled together via a connector (5).

3. The thermoelectric power generation device according to claim 1, characterized in that: The fan assembly (4) comprises a hollow protective cover (41) and a fan (42), wherein the fan (42) is fixed to the protective cover (41) via an outer ventilation cover (43) and an inner ventilation cover (44).

4. The thermoelectric power generation device according to claim 3, characterized in that: One end of the protective cover (41) is provided with a power generation assembly (3) and is fixedly coupled with the flange (1), and the other end is provided with an external ventilation cover (43); a plurality of ventilation slots (11) are provided at one end of the protective cover (41) adjacent to the flange (1).

5. The thermoelectric power generation device according to claim 4, characterized in that: A plurality of ventilation slots (11) are circumferentially and axially arranged on the protective cover (41), and the ventilation slots (11) are long slots.

6. A thermoelectric power generation device according to any one of claims 1 to 5, characterized in that: A plurality of heat dissipation holes are provided on the heat dissipation block (33).

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