A new energy automobile uses scroll compressor heat recovery device

Abstract

The utility model provides a kind of scroll compressor heat recovery device for new energy vehicle, including scroll compressor body, the cover of sleeve set on the cylinder cover of scroll compressor body, the closed heat exchange cavity is formed between the cover and cylinder cover, cooling liquid inlet and cooling liquid outlet are equipped on the cover, cooling liquid flows to heat exchange cavity inside by cooling liquid inlet, and after heat exchange with cylinder cover in heat exchange cavity, it flows out by cooling liquid outlet;Several radiating fins are equipped in the heat exchange cavity between the cover and cylinder cover, and one end of the radiating fin is connected with the outer wall surface of cylinder cover.The utility model can solve the problems of uneven flow, low local heat exchange efficiency, relatively high flow resistance and other problems in flow channel, and ultimately realize more efficient, lower energy consumption or more reliable heat exchange process.

Description

Technical Field

[0001] This utility model relates to the field of scroll compressor technology, and in particular to a heat recovery device for a scroll compressor used in new energy vehicles. Background Technology

[0002] Scroll compressors, as a type of high-efficiency and reliable positive displacement compressor, are widely used in refrigeration, air conditioning, heat pumps, and process gas compression due to their compact structure, stable operation, low noise, and high efficiency. Their core working principle involves a pair of meshing scrolls (one fixed, one eccentrically rotating) forming a series of constantly changing gas chambers within the cylinder, thereby achieving gas intake, compression, and discharge. However, like other mechanical compressors, scroll compressors inevitably generate a significant amount of heat during operation. This includes adiabatic heating during gas compression, friction, and mechanical losses. To maintain long-term effective operation, traditional scroll compressor designs typically employ natural or air-cooled cooling. While these methods ensure normal operation under design conditions and prevent performance degradation or mechanical damage (such as seal failure, bearing burnout, and cylinder deformation) due to overheating, current cooling methods focus more on effectively dissipating the generated heat into the environment, neglecting the significant energy value inherent in this dissipated heat itself.

[0003] In today's context of energy conservation and environmental protection, the large amount of heat directly emitted into the environment constitutes a serious waste of energy. Especially for refrigeration, air conditioning, and heat pump systems, scroll compressors, as their core power components, can significantly improve the energy efficiency ratio of the entire system if the heat they generate can be effectively recovered and utilized. This would greatly reduce operating costs and make a positive contribution to carbon emission reduction.

[0004] Currently, heat recovery technologies for scroll compressors on the market are not yet mature or have certain limitations. Existing heat recovery methods are often complex in design, costly, and inefficient, making it difficult to match the compact and efficient characteristics of scroll compressors. In particular, how to achieve efficient and economical heat recovery without affecting the original structure, reliability, and operating efficiency of scroll compressors remains a technical problem that urgently needs to be solved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this utility model provides a heat recovery device for a scroll compressor used in new energy vehicles. By installing a cover on the cylinder head of the scroll compressor and placing flowing coolant inside the cover, the coolant carries away the heat from the cylinder head, achieving the effect of cooling the compressor. At the same time, the energy of the coolant after heat exchange is recovered and utilized, realizing energy recovery and utilization, energy saving, emission reduction, and environmental protection.

[0006] This utility model achieves the above-mentioned technical objectives through the following technical means.

[0007] A heat recovery device for a scroll compressor used in new energy vehicles includes a scroll compressor body and a cover fitted onto the cylinder head of the scroll compressor body. A sealed heat exchange cavity is formed between the cover and the cylinder head. The cover has a coolant inlet and a coolant outlet. Coolant flows into the heat exchange cavity through the coolant inlet, exchanges heat with the cylinder head in the heat exchange cavity, and then flows out through the coolant outlet. A plurality of heat dissipation fins are provided in the heat exchange cavity between the cover and the cylinder head, and one end of each heat dissipation fin is connected to the outer wall of the cylinder head.

[0008] Furthermore, the heat dissipation fins are sheet-like and made of thermally conductive material; the plurality of heat dissipation fins are parallel to each other, and the sheet-like surface of the heat dissipation fins is perpendicular to the central axis of the coolant inlet.

[0009] Furthermore, a few turbulence plates are provided in the heat exchange cavity between the sleeve cover and the cylinder head. The turbulence plates are connected to the inner wall surface of the sleeve cover and are sheet-shaped. Several turbulence plates and heat dissipation fins are distributed alternately in the heat exchange cavity to form a labyrinthine heat exchange channel.

[0010] Furthermore, the baffles are parallel to each other, and the sheet-like surfaces of the baffles are perpendicular to the central axis of the coolant inlet.

[0011] Furthermore, the spacing between adjacent heat dissipation fins is equal to the spacing between adjacent spoilers, and the heights of the heat dissipation fins and spoilers are equal.

[0012] Furthermore, the height of the heat dissipation fins and / or spoilers is between one-quarter and one-third of the height of the cavity between the cover and the cylinder head.

[0013] Furthermore, the cross-sectional thickness of the spoiler and heat dissipation fins is gradually varying.

[0014] Furthermore, the cross-sectional thickness of a single spoiler gradually expands downwards from the root, while the cross-sectional thickness of a single heat dissipation fin gradually shrinks upwards from the root, resulting in a gradually changing vertical flow path in the labyrinthine heat exchange channel.

[0015] Furthermore, each individual spoiler has several protrusions spaced apart on its top, and the cylinder head surface corresponding to the protrusions has grooves. The grooves correspond one-to-one with the protrusions, and the protrusions are used to generate turbulence near the grooves.

[0016] A scroll compressor for new energy vehicles includes a scroll compressor heat recovery device.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The heat recovery device for a scroll compressor used in new energy vehicles described in this utility model, by setting a sleeve on the cylinder head of the scroll compressor and placing flowing coolant inside the sleeve, pumps the coolant with a lower temperature into the inlet, fully absorbs the heat generated by the cylinder head inside the sleeve, and finally the coolant with a higher temperature flows out from the outlet, thus achieving a continuous and stable heat dissipation effect, keeping the cylinder head of the compressor always within a suitable operating temperature range, and utilizing the coolant with a higher temperature as needed, achieving the dual effects of energy saving and emission reduction and energy recovery. It not only optimizes the thermal management performance of the scroll compressor, but also improves the energy utilization efficiency.

[0019] 2. The heat recovery device for a scroll compressor used in new energy vehicles described in this utility model, by setting heat dissipation fins on the outer surface of the compressor cylinder head, can transfer the heat inside the cylinder head to the outside through the heat dissipation fins. With a larger contact area, the heat transfer is faster and more complete, which not only improves the heat dissipation efficiency, but also ensures the uniformity and stability of cooling. Even when the scroll compressor is operating under high load, the temperature of the cylinder head can be effectively controlled within a safe and ideal range, avoiding performance degradation, component damage or machine damage caused by overheating.

[0020] 3. The heat recovery device for a scroll compressor used in new energy vehicles described in this utility model, by setting a baffle inside the cover and utilizing the baffle in conjunction with the heat dissipation fins on the cylinder head in an intermittent manner, forms a labyrinthine heat exchange channel. This allows the coolant to travel a longer distance through the labyrinthine heat exchange channel, further extending the contact time between the coolant and the cylinder head, which is conducive to the full transfer of heat. At the same time, this tortuous channel also allows the coolant to frequently change direction and accelerate and decelerate during operation, which induces or enhances the turbulence of the coolant. Turbulence has a higher convective heat transfer coefficient than laminar flow, enabling better heat exchange and thus more quickly removing heat from the scroll compressor. This not only effectively reduces the temperature of the compressor but also improves the efficiency of heat recovery and utilization.

[0021] 4. The heat recovery device for a scroll compressor used in new energy vehicles described in this utility model has a cross-sectional thickness that gradually expands downward from the root of a single baffle, while the cross-sectional thickness of a single heat dissipation fin gradually decreases upward from the root. In the labyrinthine heat exchange channels formed by these components, the vertical flow channels are gradually changing, while the horizontal flow channels are gentle. This can solve problems such as uneven flow, low local heat exchange efficiency, and relatively high flow resistance in the flow channels, ultimately achieving a higher efficiency, lower energy consumption, or more reliable heat exchange process.

[0022] 5. The heat recovery device for a scroll compressor used in new energy vehicles described in this utility model features several protrusions spaced at the top of a single spoiler, while the cylinder head surface corresponding to the protrusions has grooves. When fluid flows through the protrusions, it generates local acceleration, vortices, and secondary flow, enhancing the fluid's scouring of the high-temperature wall surface. When the flow field near the grooves is disturbed, the thermal boundary layer is thinned, significantly improving the local heat transfer coefficient. Furthermore, the matching of the protrusions and grooves forms a "protrusion-driven + groove-captured" flow field. The protrusions guide the mainstream fluid to the groove region, forcing the fluid to directly impact the high-temperature surface at the bottom of the groove. The grooves extend the fluid residence time, improving heat extraction efficiency. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are some embodiments of this utility model. For those skilled in the art, it is obvious that other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 An exploded view of the scroll compressor heat recovery device described in this utility model.

[0025] Figure 2 This is a schematic diagram of the assembly of the scroll compressor heat recovery device described in this utility model.

[0026] Figure 3 This is a schematic diagram of the cover of the scroll compressor heat recovery device described in this utility model.

[0027] Figure 4 This is a cross-sectional view of the scroll compressor heat recovery device described in this utility model.

[0028] Figure 5 This is a schematic diagram of the labyrinth heat exchange channel in Example 1.

[0029] Figure 6 This is a schematic diagram of the labyrinth heat exchange channel in Example 2.

[0030] Figure 7 This is a schematic diagram of the labyrinth heat exchange channel in Example 3.

[0031] In the picture:

[0032] 1-Cylinder cover; 2-Radiator fins; 3-Cylinder head; 4-Stationary scroll plate; 5-Moving scroll plate; 6-Spoiler; 6-1-Protrusion; 7-Coolant inlet; 7-1-Groove; 8-Coolant outlet; 9-Exhaust port. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Example 1

[0037] like Figure 1 , Figure 2 and Figure 3 As shown in Embodiment 1 of this utility model, the heat recovery device for a scroll compressor includes a cover 1 and a scroll compressor body. The cover 1 is fitted onto the cylinder head 3 of the scroll compressor. The scroll compressor body mainly includes a moving scroll plate 5, a stationary scroll plate 3, and a cylinder head 3. The scroll compressor body is a relatively mature existing technology and will not be described in detail here. The cylinder head 3 is provided with an exhaust port 9 for exhausting the scroll compressor body. A heat exchange cavity is provided between the cover 1 fitted onto the cylinder head 3 and the cylinder head 3. As can be seen in the figure, a heat exchange cavity is formed between the outer side of the cylinder head 3 and the inner side of the cover 1, and coolant flows through the cavity. At the same time, a sealing gasket is provided between the cylinder head 3 and the cover 1 to prevent coolant leakage.

[0038] The sleeve cover 1 is provided with a coolant inlet 7 and a coolant outlet 8. The coolant inlet 7 is connected to the pump via a pipe, and the coolant outlet 8 carries the cooled liquid after heat exchange. This cooled liquid can be used to preheat equipment or, after heat exchange through a heat exchanger, becomes a low-temperature coolant before flowing back into the pump inlet. The lower-temperature coolant is pumped through the coolant inlet 7 into the cavity between the sleeve cover 1 and the cylinder head 3, where it exchanges heat with the cylinder head 3 of the scroll compressor. The higher-temperature coolant after heat exchange then flows out from the coolant outlet 8. Generally, the coolant inlet 7 is positioned higher than the coolant outlet 8, which helps reduce the energy consumption of pumping the low-temperature coolant.

[0039] In order to better transfer the heat generated by the scroll compressor to the outside, several sheet-like heat dissipation fins 2 are provided on the outer top wall of the cylinder head 3 of the scroll compressor. The several sheet-like heat dissipation fins 2 are arranged parallel to each other, which is conducive to the uniform transfer and dissipation of heat. In order to ensure the long-term working effect of the heat dissipation fins 2, the heat dissipation fins 2 can be fixedly installed on the top of the cylinder head 3.

[0040] In order to ensure that the coolant is distributed as evenly as possible in the cavity between the cover 1 and the cylinder head 3, the plate-shaped surface of the heat dissipation fin 2 is arranged facing the coolant inlet 7 of the cover 1, and preferably the plate-shaped surface of the heat dissipation fin 2 is arranged perpendicular to the central axis of the coolant inlet 7.

[0041] Preferably, the heat dissipation fins 2 are made of a material with good thermal conductivity, so as to conduct heat on the cylinder head 3 more quickly and exchange heat with the coolant.

[0042] To enhance the heat exchange efficiency of the coolant, several sheet-like baffles 6 are arranged parallel to each other on the inner wall of the top wall of the cover 1, which facilitates more uniform distribution and flow of the coolant within the cavity. To further improve the effectiveness of the baffles 6, the sheet-like surfaces of the baffles 6 are perpendicular to the central axis of the coolant inlet 7. The baffles 6 and the heat dissipation fins 2 are staggered vertically, forming a labyrinthine heat exchange channel between them.

[0043] like Figure 4As shown, in order to guide the flow path of the coolant and enhance the cooling heat exchange effect, the height of several sheet-like structures of the heat dissipation fins 2 is set to be the same size, and their height is set to be between one-quarter and one-third of the height of the cavity between the cover 1 and the cylinder head 3. Their length is set according to the specific situation of the cylinder head 3. When the cylinder head is long, the length of the heat dissipation fins 2 is appropriately increased, and when the cylinder head 3 is short, the length of the heat dissipation fins 2 is appropriately shortened. The spacing between several heat dissipation fins 2 is set to be equal. Similarly, the height of several sheet-like structures of the baffles 6 is set to be the same size, and their height is set to be between one-quarter and one-third of the height of the cavity between the cover 1 and the cylinder head 3. Their length is set according to the length of the cylinder head 3. The spacing between the baffles 6 is set to be equal.

[0044] like Figure 5 As shown, in order to allow for better heat exchange of the coolant within the cavity, the spacing between the heat dissipation fins 2 and the spacing between the baffles 6 are set to be equal, and the heights of the heat dissipation fins 2 and the baffles 6 are also set to be equal. During installation, the heat dissipation fins 2 and the baffles 6 are evenly spaced and staggered. At this point, within the cavity between the cover 1 and the cylinder head 3, the heat dissipation fins 2 and the baffles 6 form the only flow channel for the coolant. This flow channel is a labyrinthine heat exchange channel, as shown... Figure 5 The middle arrow indicates the direction. When the low-temperature coolant flows in from the coolant inlet 7, the coolant will exchange heat along the labyrinthine heat exchange channel. At the bend, turbulence will be formed, which will make the coolant generate efficient agitation and mixing, thereby enhancing the heat transfer effect. Finally, the high-temperature coolant after heat exchange will be discharged through the coolant outlet for heat recovery and utilization.

[0045] Example 2, based on Example 1, such as Figure 6As shown, the cross-sectional thickness of a single baffle 6 gradually expands downwards from its root, while the cross-sectional thickness of a single heat dissipation fin 2 gradually contracts upwards from its root. This creates a labyrinthine heat exchange channel where the vertical flow path is gradually changing, while the horizontal flow path is gently sloping. This addresses issues such as uneven flow, low local heat transfer efficiency, and relatively high flow resistance, ultimately achieving a more efficient, lower energy consumption, or more reliable heat exchange process. The downward expansion of the baffle 6's root effectively creates more space at the root of the baffle 6 on its windward side, guiding the mainstream fluid more smoothly into the narrow area at the fin root and flushing out the original dead zone. The upward contraction of the heat dissipation fin 2's root reduces the space at the root of the fin on its leeward side, forcing the fluid to flow closer to the surface of the fin 2, also reducing the dead zone in this area. This combination significantly improves the overall flow channel, especially the flow field coverage in the fin root region, reducing the dead zone area and increasing the effective utilization rate of the heat exchange surface. The expansion and contraction design alters the rate of change of the flow channel cross-section, generating stronger velocity and pressure gradients at the root regions of the heat dissipation fins 2 or the baffles 6. The expansion of the baffles 6 may produce slight acceleration and changes in flow direction, while the contraction of the heat dissipation fins 2 may produce slight deceleration or flow direction adjustment. These changes enhance the shearing effect of the fluid on the wall, promoting the development, separation, and reattachment of the boundary layer, or generating local secondary flows, thereby more effectively disturbing and thinning the thermal boundary layer and improving the local heat transfer coefficient.

[0046] Example 3, based on Example 1 or Example 2, such as Figure 7 As shown, a single spoiler 6 has several protrusions 6-1 spaced apart on its top, and the cylinder head 3 surface corresponding to the protrusions 6-1 has grooves 3-1, with each groove 3-1 corresponding to a protrusion 6-1. The surface of the cylinder head 3 is a high-temperature area, and the grooves 3-1 located on the surface of the cylinder head 3 can increase the heat transfer area. The protrusions 6-1 can generate turbulence near the grooves 3-1. In embodiment 3, the protrusions 6-1 are small turbulence structures that can directly disrupt the boundary layer. When the fluid flows through the protrusions 6-1, local acceleration, vortices, and secondary flows are generated, enhancing the scouring of the high-temperature wall surface by the fluid. When the flow field near the grooves 3-1 is disturbed, the thermal boundary layer is thinned, significantly improving the local heat transfer coefficient. In addition, the matching of the protrusions 6-1 and the grooves 3-1 forms a "protrusion-driven + groove-captured" flow field. The protrusions 6-1 guide the mainstream fluid to the groove 3-1 area, forcing the fluid to directly impact the high-temperature surface at the bottom of the groove. The grooves 3-1 extend the fluid residence time, improving the heat extraction efficiency.

[0047] A scroll compressor for new energy vehicles includes the scroll compressor heat recovery device described in Example 1, Example 2, or Example 3.

[0048] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0049] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent embodiments or modifications made without departing from the spirit of the present utility model should be included within the scope of protection of the present utility model.

Claims

1. A scroll compressor heat recovery device for a new energy vehicle, characterized by, The system includes a scroll compressor body and a cover (1) fitted onto the cylinder head (3) of the scroll compressor body. A closed heat exchange cavity is formed between the cover (1) and the cylinder head (3). The cover (1) is provided with a coolant inlet (7) and a coolant outlet (8). The coolant flows into the heat exchange cavity through the coolant inlet (7), exchanges heat with the cylinder head (3) in the heat exchange cavity, and then flows out through the coolant outlet (8). A number of heat dissipation fins (2) are provided in the heat exchange cavity between the cover (1) and the cylinder head (3). One end of the heat dissipation fin (2) is connected to the outer wall of the cylinder head (3).

2. The heat recovery device for a scroll compressor used in new energy vehicles according to claim 1, characterized in that, The heat dissipation fins (2) are sheet-shaped and made of thermally conductive material; the plurality of heat dissipation fins (2) are parallel to each other, and the sheet-shaped surface of the heat dissipation fins (2) is perpendicular to the central axis of the coolant inlet (7).

3. The heat recovery device for a scroll compressor used in new energy vehicles according to claim 1, characterized in that, The heat exchange cavity between the cover (1) and the cylinder head (3) is provided with several turbulence plates (6), which are connected to the inner wall of the cover (1) and are sheet-shaped. Several turbulence plates (6) and heat dissipation fins (2) are staggered in the heat exchange cavity to form a labyrinth heat exchange channel.

4. The heat recovery device for a scroll compressor used in new energy vehicles according to claim 3, characterized in that, The turbulence plates (6) are parallel to each other, and the sheet-like surface of the turbulence plates (6) is perpendicular to the central axis of the coolant inlet (7).

5. The heat recovery device for a scroll compressor used in new energy vehicles according to claim 3, characterized in that, The spacing between adjacent heat dissipation fins (2) is equal to the spacing between adjacent baffles (6), and the heights of the heat dissipation fins (2) and baffles (6) are equal.

6. The heat recovery device for a scroll compressor used in new energy vehicles according to claim 3, characterized in that, The height of the heat dissipation fins (2) and / or the spoiler (6) is between one-quarter and one-third of the height of the cavity between the cover (1) and the cylinder head (3).

7. The heat recovery device for a scroll compressor used in new energy vehicles according to claim 3, characterized in that, The cross-sectional thickness of the spoiler (6) and the heat dissipation fin (2) is gradually changing.

8. The heat recovery device for a scroll compressor used in new energy vehicles according to claim 7, characterized in that, The cross-sectional thickness of a single baffle (6) gradually expands downward from the root, and the cross-sectional thickness of a single heat dissipation fin (2) gradually shrinks upward from the root, forming a labyrinthine heat exchange channel with a gradually changing vertical flow channel.

9. The heat recovery device for a scroll compressor used in new energy vehicles according to claim 3, characterized in that, A number of protrusions (6-1) are spaced apart on the top of a single spoiler (6). The cylinder head (3) surface corresponding to the protrusions (6-1) is provided with grooves (3-1). The grooves (3-1) correspond one-to-one with the protrusions (6-1). The protrusions (6-1) are used to generate turbulence near the grooves (3-1).

10. A scroll compressor for new energy vehicles, characterized in that, The heat recovery device for a scroll compressor as described in any one of claims 1-9.

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