Zero-carbon-emission and high-efficiency rotary compression type cartridge heat pump device

Abstract

The invention provides a rotary compression type clamping elastic heat pump device with zero carbon emission and high efficiency. The rotary compression type clamping elastic heat pump device comprises an end face cam assembly, a push rod assembly, a heat exchange sleeve, shape memory alloy and a fixing support. Rotation motion is converted into continuous reciprocating linear motion through an end face cam structure, motion pause or direction reversal is not needed, and therefore the shape memory alloy is efficiently driven to complete the compression heat release and rebound heat absorption process, traditional carbon-containing liquid phase change materials are replaced, and zero carbon emission is achieved. Meanwhile, a plurality of heat exchange assemblies (including push rod assemblies, heat exchange sleeves and shape memory alloys) are uniformly arranged on the cam, so that constant or approximately constant load torque can be kept, the energy conversion efficiency is further improved, and the system energy consumption is reduced.

Description

Technical Field

[0001] This patent proposes a zero-carbon emission and high-efficiency rotary compression cartridge heat pump device, belonging to the field of heat pump equipment, aiming to improve the heating efficiency and system stability on the basis of zero-carbon emission. Background Art

[0002] A heat pump is a device that can be driven by electricity and is used to transfer heat between different heat sources. The current global energy consumption of heat pumps has reached more than 20%. However, the current vapor compression cycle heat pump system relies on hydrofluorocarbons, whose greenhouse effect far exceeds that of carbon dioxide, and its leakage is expected to account for more than 11% of the global CO2 equivalent emissions by 2050. But currently, there is a lack of heat carriers with low greenhouse effects. Therefore, it is urgent to develop new green heat pump technologies to meet the needs of future low-carbon development.

[0003] The cartridge heat pump is based on the cartridge effect of shape memory alloys (SMAs), uses mechanical stress to induce the austenite-martensite phase transformation, and realizes heat regulation through the release or absorption of latent heat. According to the different types of stress, this technology can be divided into uniaxial stress (piezocaloric), torsional stress (twistocaloric), bending stress (flexocaloric), and hydrostatic pressure (piezocaloric) modes. Among them, the cartridge heat pump system based on a compressed thin-walled tube has attracted much attention due to its good fatigue resistance, high energy efficiency ratio, and large temperature span.

[0004] However, the current compressed thin-walled tube system mainly relies on high-thrust linear reciprocating drive methods, such as screw or hydraulic drive, which require frequent start-stop or forward-reverse rotation of the rotary motor, resulting in a reduction in energy utilization efficiency and restricting its commercial application. Therefore, optimizing the cartridge heat pump device and improving the energy efficiency ratio are the key directions for future research. Summary of the Invention

[0005] The purpose of this invention patent is to provide a zero-carbon emission and high-efficiency rotary compression cartridge heat pump device aiming at the deficiencies of the prior art, which can efficiently convert rotary motion into reciprocating linear motion and improve the energy utilization efficiency of the heat pump device.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A zero-carbon-emission and high-efficiency rotary compression cartridge heat pump device, comprising an end face cam assembly 1, a push rod assembly 2, a heat exchange sleeve 3, a shape memory alloy 4 and a fixed bracket 5, characterized in that the end face contour end of the end face cam assembly 1 is connected to the push rod ends of at least three or more uniformly distributed push rod assemblies 2, realizing the conversion of stable and efficient rotary motion into reciprocating linear motion. The push rod assembly 2 is in sealed dynamic connection with the heat exchange sleeve 3. One end of the push rod assembly 2 is connected to the shape memory alloy 4, and the heat exchange sleeve 3 and the shape memory alloy 4 are concentrically connected 8. The end face cam assembly 1, the push rod assembly 2, the heat exchange sleeve 3 and the shape memory alloy 4 are all connected to the fixed bracket 5.

[0008] One end of the end face cam assembly 1 is connected to a high-torque rotary power source, such as a high-torque motor or a combination of a common motor and a high-ratio reduction gearbox.

[0009] One end of the heat exchange sleeve 3 is connected to a fluid circulation system, which is connected to an endothermic fluid during the compression process and is used to absorb the heat released during the compression of the shape memory alloy; while during the release process, it is connected to a cold-absorbing fluid and is used to absorb the cold released during the release of the shape memory alloy.

[0010] The end face cam assembly 1 includes an end face cam 11 and a radial thrust combined bearing (12), and the end face cam 11 and the radial thrust combined bearing (12) are concentrically connected.

[0011] The design of the end face contour of the end face cam 11 determines the magnitude of the compression amount and the time ratio of the compression process, compression hold, release process and release hold.

[0012] The push rod assembly 2 includes a cam push rod 21 and a linear bearing 22, and the cam push rod 21 and the linear bearing 22 are concentrically connected.

[0013] The heat exchange sleeve 3 includes a heat exchange tube 31, a sealing gland 32, an elastic sealing ring 33 and a heat exchange fluid inlet and outlet 34. The heat exchange tube 31 is respectively connected to the sealing gland 32 and the elastic sealing ring 33, and both ends of the heat exchange tube 31 are connected to the heat exchange fluid inlet and outlet 34.

[0014] The shape memory alloy 4 has the function of a solid heat agent, and its temperature rises and releases heat when compressed, while its temperature drops and absorbs heat when rebounding.

[0015] The fixed bracket 5 includes a cam support 51, a push rod support 52, a heat exchange tube support 53 and a connecting rod 54. The cam support 51, the push rod support 52 and the heat exchange tube support 53 are all adjustably connected to the connecting rod 54.

[0016] The beneficial effects of the present invention:

[0017] ① This device uses shape memory alloy as the heating material, replacing the traditional carbon-based liquid phase change material, effectively avoiding greenhouse gas emissions, meeting the strategic goals of "carbon peak" and "carbon neutrality", and meeting the requirements of environmental protection.

[0018] ② An end face cam mechanism is adopted to achieve seamless conversion between rotational motion and reciprocating linear motion, driving the periodic compression heat release and rebound heat absorption of the shape memory alloy, significantly enhancing the stability and efficiency of the heat cycle process.

[0019] ③ Through the uniform distribution of multiple heat exchange components (including the push rod assembly, heat exchange sleeve, and shape memory alloy), a constant or stable load torque is maintained, thereby further enhancing the energy conversion efficiency and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 It is a schematic structural diagram of a zero-carbon emission, high-efficiency rotary compression type cartridge heat pump device provided by an embodiment of the present invention.

[0022] Figure 2 It is a schematic structural diagram of an end face cam assembly of a zero-carbon emission, high-efficiency rotary compression type cartridge heat pump device provided by an embodiment of the present invention.

[0023] Figure 3 It is a schematic structural diagram of a push rod assembly of a zero-carbon emission, high-efficiency rotary compression type cartridge heat pump device provided by an embodiment of the present invention.

[0024] Figure 4 It is a schematic structural diagram of a heat exchange sleeve of a zero-carbon emission, high-efficiency rotary compression type cartridge heat pump device provided by an embodiment of the present invention.

[0025] In the above figures: end face cam assembly 1, end face cam 11, radial thrust combined bearing 12, push rod assembly 2, cam push rod 21, linear bearing 22, heat exchange sleeve 3, heat exchange tube 31, sealing gland 32, elastic sealing ring 33, heat exchange fluid inlet and outlet 34, shape memory alloy 4, fixed bracket 5, cam support 51, push rod support 52, heat exchange tube support 53, and connecting rod 54.

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Detailed Embodiments

[0027] Embodiment: As Figure 1 shown, a zero-carbon emission, high-efficiency rotary compression cartridge heat pump device includes an end face cam assembly 1, a push rod assembly 2, a heat exchange sleeve 3, a shape memory alloy 4, and a fixed bracket 5.

[0028] The end face contour end of the end face cam assembly 1 is connected to the push rod ends of at least three or more uniformly distributed push rod assemblies 2, realizing the conversion of stable and efficient rotary motion into reciprocating linear motion. For example, when the end face contour satisfies the sine law, the load torque of a single cam push rod 21 can be expressed as follows:

[0029]

[0030] The value of the load torque varies between 0 and 2A.

[0031] When there are three uniformly distributed cam push rods 21, the load torque can be expressed as follows:

[0032]

[0033] The value of the load torque remains constant at 3A.

[0034] The push rod assembly 2 is in sealed dynamic connection with the heat exchange sleeve 3. One end of the push rod assembly 2 is connected to the shape memory alloy 4. The heat exchange sleeve 3 and the shape memory alloy 4 are concentrically connected 8. The end face cam assembly 1, the push rod assembly 2, the heat exchange sleeve 3, and the shape memory alloy 4 are all connected to the fixed bracket 5.

[0035] One end of the end face cam assembly 1 is connected to a high-torque rotary power source, such as a high-torque motor or a combination of a common motor and a high-ratio reduction gearbox.

[0036] One end of the heat exchange sleeve 3 is connected to a fluid circulation system, which is connected to an endothermic fluid during the compression process and is used to absorb the heat released during the compression process of the shape memory alloy; while during the release process, it is connected to a cold-absorbing fluid and is used to absorb the cold released during the release process of the shape memory alloy.

[0037] As Figure 2As shown, the end face cam assembly 1 includes an end face cam 11 and a radial thrust combined bearing (12), and the end face cam 11 and the radial thrust combined bearing (12) are concentrically connected.

[0038] The design of the end face contour of the end face cam 11 determines the magnitude of the compression amount and the time ratio of the compression process, compression hold, release process, and release hold, and its contour curve is constructed according to the sine law and the trapezoidal law.

[0039] As Figure 3 shown, the push rod assembly 2 includes a cam push rod 21 and a linear bearing 22, and the cam push rod 21 and the linear bearing 22 are concentrically connected.

[0040] As Figure 4 shown, the heat exchange sleeve 3 includes a heat exchange tube 31, a sealing gland 32, an elastic sealing ring 33, and a heat exchange fluid inlet and outlet 34. The heat exchange tube 31 is respectively connected to the sealing gland 32 and the elastic sealing ring 33, and both ends of the heat exchange tube 31 are connected to the heat exchange fluid inlet and outlet 34; the heat exchange fluid enters and exits the heat exchange tube 31 through the heat exchange fluid inlet and outlet 34 to achieve heat exchange; by pressing the elastic sealing ring 33 with the sealing gland 32, a sealed dynamic connection between the cam push rod 21 and the heat exchange sleeve 3 is realized, and on the basis of ensuring the relative movement between the two, it is ensured that the heat exchange fluid in the heat exchange sleeve 3 does not leak.

[0041] The shape memory alloy 4 has the function of a solid heat generating agent, such as a cylindrical nickel-titanium alloy (NiTi) material, which will release heat when compressed and absorb heat when rebounding.

[0042] As Figure 1 shown, the fixed bracket 5 includes a cam support 51, a push rod support 52, a heat exchange tube support 53, and a connecting rod 54. The cam support 51, the push rod support 52, and the heat exchange tube support 53 are all adjustably connected to the connecting rod 54, and the distances between the cam support 51, the push rod support 52, and the heat exchange tube support 53 can be adjusted according to actual application requirements.

Claims

1. A zero-carbon emission and high-efficiency rotary compression cartridge heat pump device, comprising an end face cam assembly (1), a push rod assembly (2), a heat exchange sleeve (3), a shape memory alloy (4), and a fixed bracket (5). Its characteristics are that the end face contour end of the end face cam assembly (1) is connected to the push rod ends of at least three evenly distributed push rod assemblies (2), realizing the conversion of stable and efficient rotary motion into reciprocating linear motion. The push rod assembly (2) is in sealed movable connection with the heat exchange sleeve (3). One end of the push rod assembly (2) is connected to the shape memory alloy (4). The heat exchange sleeve (3) and the shape memory alloy (4) are concentrically connected (8). The end face cam assembly (1), the push rod assembly (2), the heat exchange sleeve (3), and the shape memory alloy (4) are all connected to the fixed bracket (5); One end of the end face cam assembly (1) is connected to a high-torque rotary power source; One end of the heat exchange sleeve (3) is connected to a fluid circulation system.

2. The zero-carbon emission and high-efficiency rotary compression cartridge heat pump device according to claim 1, characterized in that The end face cam assembly (1) includes an end face cam (11) and a radial thrust combined bearing (12), and the end face cam (11) and the radial thrust combined bearing (12) are concentrically connected.

3. The zero-carbon emission and high-efficiency rotary compression cartridge heat pump device according to claim 2, characterized in that The design of the end face contour of the end face cam (11) determines the magnitude of the compression amount and the time ratio of the compression process, compression holding, release process, and release holding.

4. The zero-carbon-emission, high-efficiency rotary compression cartridge heat pump device according to claim 1, characterized in that The push rod assembly (2) includes a cam push rod (21) and a linear bearing (22), and the cam push rod (21) and the linear bearing (22) are concentrically connected.

5. The zero-carbon emission, high-efficiency rotary compression cartridge heat pump device according to claim 1, characterized in that The heat exchange sleeve (3) includes a heat exchange tube (31), a sealing gland (32), an elastic sealing ring (33), and a heat exchange fluid inlet and outlet (34). The heat exchange tube (31) is respectively connected to the sealing gland (32) and the elastic sealing ring (33), and both ends of the heat exchange tube (31) are connected to the heat exchange fluid inlet and outlet (34).

6. The zero-carbon emission and high-efficiency rotary compression cartridge heat pump device according to claim 1, characterized in that The shape memory alloy (4) has the function of a solid heat agent. When compressed, its temperature rises and releases heat, and when it rebounds, its temperature drops and absorbs heat, such as nickel-titanium alloy (NiTi).

7. The zero-carbon emission and high-efficiency rotary compression cartridge heat pump device according to claim 1, characterized in that The fixed bracket (5) includes a cam support (51), a push rod support (52), a heat exchange tube support (53), and a connecting rod (54). The cam support (51), the push rod support (52), and the heat exchange tube support (53) are all adjustably connected to the connecting rod (54).

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