Magnetic refrigeration temperature control system

Abstract

The application discloses a magnetic refrigeration temperature control system, which has the characteristics of absorbing heat from the outside world during the demagnetization process of a magnetic refrigeration generator, and the magnetic refrigeration generator can absorb the heat of heat exchange medium flowing through the demagnetization refrigeration channel when the cooling pipeline and the load pipeline are connected, so as to reduce the temperature of the heat exchange medium, and the heat exchange medium can play a cooling effect after entering the load pipeline from the cooling pipeline. The magnetic refrigeration generator has the characteristics of releasing heat during the magnetization process, and the magnetic refrigeration generator can release heat to increase the temperature of heat exchange medium flowing through the magnetization heating channel when the heating pipeline and the load pipeline are connected, so that the heat exchange medium can play a heating effect after entering the load pipeline from the heating pipeline. The temperature switching is fast and stable, the heat exchange medium can be an environmentally friendly substance such as water, the system is green and environmentally friendly, does not need a compressor, has few moving parts, has no vibration and noise, and has low energy consumption.

Description

Technical Field

[0001] This invention relates to the field of semiconductor temperature control technology, and in particular to a magnetic refrigeration temperature control system. Background Technology

[0002] Currently, the refrigeration and heating systems of temperature control equipment used in the semiconductor field are basically based on vapor compression and expansion. This system requires a compressor, which is noisy and energy-intensive. The Carnot cycle efficiency is generally 20-40%. The refrigerant used in this process is mostly Freon, which damages the atmospheric ozone layer and exacerbates the greenhouse effect. Summary of the Invention

[0003] The purpose of this invention is to provide a magnetic refrigeration temperature control system that utilizes the heat released during magnetization and the heat absorbed during demagnetization of a magnetic refrigeration generator to cool and heat the load pipeline respectively. The temperature switching is rapid and stable, and the heat exchange medium can be environmentally friendly substances such as water. It is green and environmentally friendly, and does not require a compressor. It has fewer moving parts, no vibration or noise, high reliability, long service life, and is easy to maintain. Moreover, the theoretical efficiency of magnetic refrigeration can reach 60-70% of the Carnot cycle efficiency, and the energy consumption is low.

[0004] This invention discloses a magnetic refrigeration temperature control system, including a magnetic refrigeration generator, a load pipeline, a cooling pipeline, and a heating pipeline;

[0005] The magnetic refrigeration generator includes a demagnetizing refrigeration channel and a magnetizing heating channel;

[0006] The load pipeline is connected to the demagnetizing refrigeration channel and the magnetizing heating channel respectively through the parallel cooling pipeline and the heating pipeline;

[0007] When the magnetic refrigeration generator is in the demagnetization process, the cooling pipe is connected to the load pipe;

[0008] When the magnetic refrigeration generator is in the magnetization process, the heating pipe is connected to the load pipe.

[0009] The above implementation utilizes the characteristic that the magnetic refrigeration generator needs to absorb heat from the outside during the demagnetization process. When the cooling pipe and the load pipe are connected, the magnetic refrigeration generator can absorb the heat of the heat exchange medium flowing through the demagnetizing refrigeration channel, thereby reducing the temperature of the heat exchange medium. Thus, the heat exchange medium achieves a cooling effect after entering the load pipe from the cooling pipe. Conversely, utilizing the characteristic that the magnetic refrigeration generator needs to release heat during the magnetization process, when the heating pipe and the load pipe are connected, the magnetic refrigeration generator can release heat to raise the temperature of the heat exchange medium flowing through the magnetized heating channel. Thus, the heat exchange medium achieves a heating effect after entering the load pipe from the heating pipe. In this way, the heat released during magnetization and the heat absorbed during demagnetization are used to cool and heat the load pipe respectively. The temperature switching is rapid and stable. The heat exchange medium can be environmentally friendly, such as water. It is green and environmentally friendly, requires no compressor, has few moving parts, no vibration or noise, high reliability, long life, and is easy to maintain. Moreover, the theoretical efficiency of magnetic refrigeration can reach 60-70% of the Carnot cycle efficiency, resulting in low energy consumption.

[0010] In an optional embodiment, the magnetic refrigeration temperature control system further includes a magnetization auxiliary pipeline, the inlet end and outlet end of which are respectively connected to the heating pipeline at positions located upstream and downstream of the load pipeline.

[0011] When the magnetic refrigeration generator is in the magnetization process, the magnetization auxiliary pipeline and the load pipeline can be selectively connected to the heating pipeline.

[0012] In the above implementation, after the magnetic refrigeration generator demagnetizes and cools the load pipeline, it needs to be remagnetized to facilitate the next demagnetization process and cooling. In order to prevent the high-temperature heat exchange medium from entering the load pipeline and causing heating during the magnetization process, a magnetization auxiliary pipeline is connected to the heating pipeline at the upstream and downstream sides of the load pipeline. In this way, after the heat released during the magnetization process of the magnetic refrigeration generator heats the heat exchange medium, the heat exchange medium can pass through the magnetization auxiliary pipeline instead of the load pipeline, thereby avoiding affecting the temperature of the load pipeline.

[0013] In an optional embodiment, the heating pipeline includes a heating input pipe and a heating output pipe;

[0014] The inlet and outlet ends of the heating input tube are respectively connected to the outlet end of the magnetized heating channel and the inlet end of the load pipeline;

[0015] The inlet and outlet ends of the heating output tube are respectively connected to the outlet end of the load pipeline and the inlet end of the magnetized heating channel.

[0016] The inlet and outlet ends of the magnetization auxiliary pipeline are respectively connected to the heating input pipe and the heating output pipe;

[0017] When the magnetic refrigeration generator is in the magnetization process, the heating input pipe, the load pipe and the heating output pipe are connected, or the heating input pipe, the magnetization auxiliary pipe and the heating output pipe are connected.

[0018] In the above embodiment, the outlet end of the magnetized heating channel is connected to the inlet end of the load pipeline via a heating input pipe, and the outlet end of the load pipeline is connected to the inlet end of the magnetized heating channel via a heating output pipe. This allows the heat exchange medium to circulate within the magnetized heating channel, heating input pipe, load pipeline, and heating output pipe. Connecting a magnetization auxiliary pipe between the heating input pipe and the heating output pipe enables parallel connection between the magnetization auxiliary pipe and the load pipeline. This facilitates switching between the magnetization auxiliary pipe and the load pipeline, selectively controlling whether or not the load pipeline needs to be heated during the magnetization process of the magnetic refrigeration generator.

[0019] In an optional embodiment, the heating pipeline further includes a heat storage device, which is disposed on the heating pipeline at a position upstream of the inlet end or downstream of the outlet end of the magnetization auxiliary pipeline.

[0020] In the above-described embodiment, by installing a heat storage tank on the heating pipeline, when the magnetization auxiliary pipeline is connected to the heating pipeline, the heat generated by the magnetization of the magnetic refrigeration generator heats the heat exchange medium, and most of the heated heat exchange medium can be stored in the heat storage tank. Thus, when the load pipeline needs to be heated, the heat exchange medium in the heat storage tank participates in the heating cycle, which can reduce the energy consumption of the magnetic refrigeration generator and quickly heat the load pipeline, further improving the heating efficiency.

[0021] In an optional embodiment, the magnetic refrigeration temperature control system further includes a demagnetizing auxiliary pipeline, the inlet end and outlet end of which are respectively connected to the cooling pipeline at positions located upstream and downstream of the load pipeline.

[0022] When the magnetic refrigeration generator is in the demagnetization process, the demagnetization auxiliary pipeline and the load pipeline can be selectively connected to the cooling pipeline.

[0023] In the above embodiment, after the magnetic refrigeration generator magnetizes and heats the load pipeline, it needs to be demagnetized to facilitate cooling during the next magnetization process. To prevent the lower-temperature heat exchange medium from entering the load pipeline and causing cooling during the demagnetization process, a demagnetization auxiliary pipeline is connected to the cooling pipeline at the upstream and downstream sides of the load pipeline. In this way, after the magnetic refrigeration generator absorbs heat and cools the heat exchange medium during the demagnetization process, the heat exchange medium can pass through the demagnetization auxiliary pipeline instead of the load pipeline, thereby avoiding any impact on the temperature of the load pipeline.

[0024] In an optional embodiment, the heating pipeline includes a cooling input pipe and a cooling output pipe;

[0025] The inlet and outlet ends of the cooling input pipe are respectively connected to the outlet end of the demagnetizing refrigeration channel and the inlet end of the load pipeline;

[0026] The inlet and outlet ends of the cooling output pipe are respectively connected to the outlet end of the load pipe and the inlet end of the demagnetizing refrigeration channel.

[0027] The inlet and outlet ends of the demagnetizing auxiliary pipeline are respectively connected to the cooling output pipe and the cooling output pipe;

[0028] When the magnetic refrigeration generator is in the demagnetization process, the cooling input pipe, the load pipe, and the cooling output pipe are connected, or the cooling input pipe, the demagnetization auxiliary pipe, and the cooling output pipe are connected.

[0029] In the above embodiment, the outlet end of the demagnetizing refrigeration channel is connected to the inlet end of the load pipeline via a cooling input pipe, and the outlet end of the load pipeline is connected to the inlet end of the demagnetizing refrigeration channel via a cooling output pipe. This allows the heat exchange medium to circulate within the demagnetizing refrigeration channel, cooling input pipe, load pipeline, and cooling output pipe. Connecting the demagnetizing auxiliary pipe between the cooling input pipe and the cooling output pipe enables parallel connection between the demagnetizing auxiliary pipe and the load pipeline. This facilitates selective switching between the demagnetizing auxiliary pipe and the load pipeline with the cooling pipeline, allowing for selective cooling of the load pipeline during the demagnetization process of the magnetic refrigeration generator.

[0030] In an optional embodiment, the heating pipeline further includes a cold storage device, which is disposed on the cooling pipeline at a position upstream of the inlet end or downstream of the outlet end of the demagnetizing auxiliary pipeline.

[0031] In the above-described embodiment, by installing a cold storage tank on the cooling pipeline, when the demagnetizing auxiliary pipeline is connected to the cooling pipeline, the magnetic refrigeration generator absorbs heat to cool the heat exchange medium after demagnetization. The cooled heat exchange medium can then be mostly stored in the cold storage tank. When the load pipeline needs to be cooled, the heat exchange medium in the cold storage tank participates in the cooling cycle, which can reduce the energy consumption of the magnetic refrigeration generator and quickly cool the load pipeline, further improving the cooling efficiency.

[0032] In an optional implementation, the load conduit includes a load pipe, a load, and a temperature controller;

[0033] The load tube is connected to the demagnetizing refrigeration channel and the magnetizing heating channel respectively through the parallel cooling pipe and the heating pipe;

[0034] When the magnetic refrigeration generator is in the demagnetization process and the cooling pipe is connected to the load pipe, the temperature value of the heat exchange medium in the load pipe is the first temperature value.

[0035] When the magnetic refrigeration generator is in the magnetization process and the heating pipe is connected to the load pipe, the temperature value of the heat exchange medium in the load pipe is the second temperature value.

[0036] The load and the temperature controller are both connected to the load tube. The temperature controller is used to heat or cool the heat exchange medium so that the absolute value of the difference between the first temperature value and the first preset temperature is less than or equal to a preset absolute difference, and the absolute value of the difference between the second temperature value and the second preset temperature is less than or equal to a preset absolute difference.

[0037] The above-described embodiment uses a temperature controller to heat or cool the heat exchange medium in the load tube accordingly. This allows for precise fine-tuning of the temperature of the heat exchange medium until the heat exchange medium cooled or heated by the magnetic refrigeration generator is finely adjusted from its original first or second temperature value to a preset first or second temperature. This satisfies the high temperature precision requirements of loads such as semiconductors, thereby improving the overall temperature control accuracy of the magnetic refrigeration temperature control system.

[0038] In an optional implementation, the temperature controller is an electric heater.

[0039] The above implementation relies on an electric heater to heat the heat exchange medium, thereby ensuring that the temperature of the heat exchange medium in the load tube meets the requirements. This is because the electric heater mainly uses current and voltage as driving conditions. Changing the current and voltage can quickly adjust the heating power of the electric heater, thereby enabling quick and sensitive control of the temperature of the heat exchange medium in the load tube. The feedback speed is fast, which is more conducive to the precise adjustment of the temperature of the heat exchange medium in the load tube.

[0040] In an optional embodiment, the load line further includes a pump and / or a temperature sensing element, wherein the pump is used to drive the flow of the heat exchange medium, and the temperature sensing element is used to detect the real-time temperature of the heat exchange medium.

[0041] The above-described implementation uses a pump to drive the flow of the heat exchange medium, thereby increasing the flow rate of the heat exchange medium and improving circulation efficiency for better cooling or heating of the load. Furthermore, a temperature sensor detects the real-time temperature of the heat exchange medium, allowing for precise control of the thermostat's operating power based on the detection results. This achieves closed-loop feedback control, enabling precise micro-adjustment of the heat exchange medium temperature within the load tube. Attached Figure Description

[0042] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of the liquid circuit of the magnetic refrigeration temperature control system according to an embodiment of the present invention.

[0044] Icons: 10-Magnetic Refrigeration Generator; 20-Load Piping; 21-Load Piping; 22-Pump; 23-Heater; 24-Temperature Sensor; 25-Load; 30-Cooling Piping; 31-Cooling Input Piping; 32-Cooling Output Piping; 33-Cooler Storage Unit; 40-Heating Piping; 41-Heating Input Piping; 42-Heating Output Piping; 43-Cooler Storage Unit; 50-Magnetic Auxiliary Piping; 60-Demagnetizing Auxiliary Piping; 70-First Multi-Way Valve; 80-Second Multi-Way Valve; 90-Third Multi-Way Valve. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0047] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention 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 invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0049] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0050] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 invention based on the specific circumstances.

[0051] Currently, the refrigeration and heating systems of existing temperature control equipment are basically based on vapor compression and expansion. This system requires a compressor, which is noisy and energy-intensive. The Carnot cycle efficiency is generally 20-40%. The refrigerant used in this process is mostly Freon, which damages the atmospheric ozone layer and exacerbates the greenhouse effect.

[0052] To address this, the inventors employed a magnetic refrigeration system for heating or cooling. This is because magnetic refrigeration does not require the use of any environmentally harmful chemicals, a significant difference from traditional compressor refrigeration. Traditional methods rely on refrigerants to absorb and release heat, and these refrigerants often contain organic fluorides, ammonia, and hydrocarbons, which have environmental drawbacks such as ozone layer depletion, toxicity, leakage, flammability, and explosiveness. 2. High efficiency and energy saving. The magnetic refrigeration system achieves cooling through magnetic field changes, rather than mechanically compressing gas as in traditional methods. This means magnetic refrigeration can operate at very low temperatures and consumes less energy. The theoretical efficiency of magnetic refrigeration can reach 60-70% of the Carnot cycle efficiency, while gas compression refrigeration is generally 20-40%. In other words, under the same conditions, magnetic refrigeration consumes only about 50% of the power of traditional compression refrigeration. 3. Stable and reliable. Magnetic refrigeration does not require a gas compressor, has fewer moving parts, no vibration, zero noise, high reliability, long lifespan, and is easy to maintain.

[0053] The principle of magnetic refrigeration mainly utilizes the magnetothermal effect. To some extent, all magnetic materials heat up when placed in a magnetic field and cool down when the field is removed; this characteristic is called the "magnetothermal effect." Atoms store energy through their own vibrations; when an external magnetic field arranges the electrons in a metal in an ordered manner and prevents them from moving freely, the vibration of the metal atoms intensifies, and the temperature increases accordingly. Removing the magnetic field lowers the temperature. In short, when a solid magnetic material is magnetized by a magnetic field, the magnetic order of the system increases (magnetic entropy decreases), releasing heat; when it is demagnetized, the magnetic order decreases (magnetic entropy increases), and it absorbs heat from the outside. Magnetic refrigeration technology can replace compressors.

[0054] Based on the above principles, this invention proposes a magnetic refrigeration temperature control system. Some embodiments of this invention will be described in detail below with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0055] Combination Figure 1 The magnetic refrigeration temperature control system of this embodiment includes a magnetic refrigeration generator 10, a load pipeline 20, a cooling pipeline 30, and a heating pipeline 40; the magnetic refrigeration generator 10 includes a demagnetizing refrigeration channel and a magnetizing heating channel;

[0056] The load pipe 20 is connected to the demagnetizing refrigeration channel and the magnetizing heating channel via parallel cooling pipe 30 and heating pipe 40, respectively. That is, the cooling pipe 30 is connected to both ends of the demagnetizing refrigeration channel and both ends of the load pipe 20 to realize the series connection of the load pipe 20, the cooling pipe 30 and the demagnetizing refrigeration channel; the heating pipe 40 is connected to both ends of the magnetizing heating channel and both ends of the load pipe 20 to realize the series connection of the load pipe 20, the heating pipe 40 and the magnetizing heating channel.

[0057] When the magnetic refrigeration generator 10 is in the demagnetization process, the cooling pipe 30 is connected to the load pipe 20.

[0058] When the magnetic refrigeration generator 10 is in the magnetization process, the heating pipe 40 is connected to the load pipe 20.

[0059] Thus, due to the characteristic that the magnetic refrigeration generator 10 needs to absorb heat from the outside during the demagnetization process, when the cooling pipe 30 and the load pipe 20 are connected, the magnetic refrigeration generator 10 can absorb the heat of the heat exchange medium flowing through the demagnetization refrigeration channel, thereby reducing the temperature of the heat exchange medium. In this way, the heat exchange medium can achieve a cooling effect after entering the load pipe 20 from the cooling pipe 30. Furthermore, due to the characteristic that the magnetic refrigeration generator 10 needs to release heat during the magnetization process, when the heating pipe 40 and the load pipe 20 are connected, the magnetic refrigeration generator 10 can release heat to raise the temperature of the heat exchange medium flowing through the magnetized heating channel. In this way, the heat exchange medium can achieve a heating effect after entering the load pipe 20 from the heating pipe 40. In this way, the magnetic refrigeration generator 10 can be used to cool and heat the load pipeline 20 by releasing heat during magnetization and absorbing heat during demagnetization, respectively. The temperature switching is fast and stable. The heat exchange medium can be environmentally friendly substances such as water. It is green and environmentally friendly. Moreover, it does not require a compressor, has few moving parts, no vibration and noise, high reliability, long service life, and is easy to maintain. Furthermore, the theoretical efficiency of magnetic refrigeration can reach 60-70% of the Carnot cycle efficiency, and the energy consumption is low.

[0060] It should be noted that the magnetic refrigeration generator 10 has a heat exchange chamber inside, and both the demagnetizing refrigeration channel and the magnetizing heating channel are connected to the heat exchange chamber. The demagnetizing refrigeration channel and the magnetizing heating channel are selectively connected to each other, so as to utilize the two characteristics of the magnetic refrigeration generator 10 that can absorb and release heat, and cool or heat the heat exchange medium flowing through the magnetic refrigeration generator 10 as needed.

[0061] Specifically, the cooling pipe 30 includes a cooling input pipe 31 and a cooling output pipe 32; the inlet and outlet ends of the cooling input pipe 31 are respectively connected to the outlet end of the demagnetizing refrigeration channel and the inlet end of the load pipe 20; the inlet and outlet ends of the cooling output pipe 32 are respectively connected to the outlet end of the load pipe 20 and the inlet end of the demagnetizing refrigeration channel.

[0062] In this way, the outlet end of the demagnetizing refrigeration channel is connected to the inlet end of the load pipeline 20 through the cooling input pipe 31, and the outlet end of the load pipeline 20 is connected to the inlet end of the demagnetizing refrigeration channel through the cooling output pipe 32, thereby realizing the circulation of the heat exchange medium in the demagnetizing refrigeration channel, the cooling input pipe 31, the load pipeline 20 and the cooling output pipe 32.

[0063] The heating pipe 40 includes a heating input pipe 41 and a heating output pipe 42; the inlet end and outlet end of the heating input pipe 41 are respectively connected to the outlet end of the magnetized heating channel and the inlet end of the load pipe 20; the inlet end and outlet end of the heating output pipe 42 are respectively connected to the outlet end of the load pipe 20 and the inlet end of the magnetized heating channel.

[0064] In this way, the outlet end of the magnetized heating channel is connected to the inlet end of the load pipeline 20 through the heating input pipe 41, and the outlet end of the load pipeline 20 is connected to the inlet end of the magnetized heating channel through the heating output pipe 42, thereby realizing the circulation of the heat exchange medium in the magnetized heating channel, the heating input pipe 41, the load pipeline 20 and the heating output pipe 42.

[0065] Among them, the inlet end of the demagnetizing refrigeration channel is, for example, Figure 1 The C port shown in the diagram has the following outlet end: for example, Figure 1 Port B shown in the diagram, the inlet end of the magnetized heating channel is, for example, Figure 1 Port A shown in the diagram, the outlet end of the magnetized heating channel is, for example, Figure 1 Port D is shown in the diagram. It is understood that ports A, B, C, and D can each be opened and closed independently to facilitate selecting the appropriate port to open or close based on the demagnetization or magnetization of the magnetic refrigeration generator 10. For example, during demagnetization, port B is connected to the cooling input pipe 31, port C is connected to the cooling output pipe 32, port A is blocked from the heating output pipe 42, and port D is blocked from the heating input pipe 41. During magnetization, port A is connected to the heating output pipe 42, port D is connected to the heating input pipe 41, port B is blocked from the cooling input pipe 31, and port C is blocked from the cooling output pipe 32.

[0066] The load line 20 includes a load line 21, a load 25, and a thermostat. The load line 21 is connected to the demagnetizing refrigeration channel and the magnetizing heating channel via parallel cooling lines 30 and heating lines 40, respectively. Specifically, the inlet end of the load line 21 is connected to the outlet end of the heating input line 41 and the outlet end of the cooling input line 31, and the outlet end of the load line 21 is connected to the inlet end of the heating output line 42 and the inlet end of the cooling output line 32.

[0067] When the magnetic refrigeration generator 10 is in the demagnetization process, the cooling pipe 30 is connected to the load pipe 21, and the heat exchange medium in the load pipe 21 is at a first temperature value; when the magnetic refrigeration generator 10 is in the magnetization process, the heating pipe 40 is connected to the load pipe 21, and the heat exchange medium in the load pipe 21 is at a second temperature value. The first temperature value is less than the second temperature value. The first temperature value is the temperature of the heat exchange medium after it has absorbed heat through the magnetic refrigeration generator 10 for demagnetization, and the second temperature value is the temperature of the heat exchange medium.

[0068] The load 25 and the temperature controller are both located on the load tube 21. The temperature controller is used to cool the heat exchange medium so that the absolute value of the difference between the first temperature value and the first preset temperature is less than or equal to the preset absolute difference. Of course, the temperature controller can also be used to heat the heat exchange medium so that the absolute value of the difference between the second temperature value and the second preset temperature is less than or equal to the preset absolute difference, and the first preset temperature is less than the second preset temperature.

[0069] In this way, by setting a temperature controller to heat or cool the heat exchange medium in the load tube 21 accordingly, the temperature of the heat exchange medium can be precisely adjusted until the heat exchange medium cooled or heated by the magnetic refrigeration generator 10 is finely adjusted from the original first temperature value or second temperature value to a preset first or second preset temperature, thereby meeting the high temperature accuracy requirements of loads such as semiconductors 25, and improving the overall temperature control accuracy of the magnetic refrigeration temperature control system.

[0070] Optionally, the temperature of the heat exchange medium after demagnetization and cooling by the magnetic refrigeration generator 10 (first temperature value) is set to be lower than a first preset temperature, and the temperature of the heat exchange medium after magnetization and heating by the magnetic refrigeration generator 10 (second temperature value) is set to be lower than a second preset temperature. In this case, the temperature controller is selected as the electric heater 23 to heat the heat exchange medium. Thus, the electric heater 23 heats the heat exchange medium, thereby ensuring that the temperature of the heat exchange medium in the load tube 21 meets the requirements. This is because the electric heater 23 mainly uses current and voltage as driving conditions. Changing the current and voltage can quickly adjust the heating power of the electric heater 23, thereby enabling quick and sensitive control of the temperature of the heat exchange medium in the load tube 20. The feedback speed is fast, which is more conducive to the precise adjustment of the temperature of the heat exchange medium in the load tube 21.

[0071] Of course, the temperature of the heat exchange medium after being demagnetized and cooled by the magnetic refrigeration generator 10 (first temperature value) can also be set to be greater than a first preset temperature, and the temperature of the heat exchange medium after being magnetized and heated by the magnetic refrigeration generator 10 (second temperature value) can be greater than a second preset temperature. In this case, a thermostat such as a semiconductor refrigeration unit can be selected to cool the heat exchange medium. In this way, by relying on the refrigeration unit to cool the heat exchange medium, the temperature of the heat exchange medium in the load tube 21 can meet the requirements, and precise adjustment of the temperature of the heat exchange medium in the load tube 21 can also be achieved.

[0072] It is understandable that the temperature controller can also be a component that can both heat and cool, such as a semiconductor temperature controller, etc. It can activate the heating or cooling function according to the real-time temperature of the heat exchange medium in the load tube 21, as long as the temperature of the heat exchange medium in the load tube 21 can be maintained at the first preset temperature or the second preset temperature according to the heating or cooling requirements.

[0073] In addition, the load line 20 also includes a pump 22 and / or a temperature sensing element 24. The pump 22 drives the flow of the heat exchange medium, thereby increasing the flow rate of the heat exchange medium and thus improving the circulation efficiency for better cooling or heating of the load 25. The temperature sensing element 24 detects the real-time temperature of the heat exchange medium so as to accurately control the operating power of the temperature controller based on the detection results, thereby realizing closed-loop feedback control and precisely fine-tuning the temperature of the heat exchange medium in the load line 21.

[0074] In this embodiment, the magnetic refrigeration temperature control system further includes a magnetization auxiliary pipeline 50. The inlet and outlet ends of the magnetization auxiliary pipeline 50 are respectively connected to the heating pipeline 40 at positions upstream and downstream of the load pipeline 20, thus being connected in parallel with the load pipeline 20. When the magnetic refrigeration generator 10 is in the magnetization process, either the magnetization auxiliary pipeline 50 or the load pipeline 20 can be connected to the heating pipeline 40.

[0075] In this way, after the magnetic refrigeration generator 10 demagnetizes and cools the load pipe 20, it needs to be remagnetized to facilitate the next demagnetization process and cooling. In order to prevent the high-temperature heat exchange medium from entering the load pipe 20 and causing heating during the magnetization process, a magnetization auxiliary pipe 50 is connected to the heating pipe 40 at the upstream and downstream sides of the load pipe 20. In this way, after the heat released by the magnetic refrigeration generator 10 during the magnetization process heats the heat exchange medium, the heat exchange medium can pass through the magnetization auxiliary pipe 50 instead of the load pipe 20, thereby avoiding affecting the temperature of the load pipe 20.

[0076] Specifically, the inlet and outlet ends of the magnetization auxiliary pipeline 50 are connected to the heating input pipe 41 and the heating output pipe 42, respectively. When the magnetic refrigeration generator 10 is in the magnetization process, the heating input pipe 41, the load pipeline 20 and the heating output pipe 42 are connected; or, when the magnetic refrigeration generator 10 is in the magnetization process, the heating input pipe 41, the magnetization auxiliary pipeline 50 and the heating output pipe 42 are connected.

[0077] Thus, by connecting the magnetization auxiliary pipe 50 between the heating input pipe 41 and the heating output pipe 42, the magnetization auxiliary pipe 50 and the load pipe 20 are connected in parallel. This makes it easy to switch between the magnetization auxiliary pipe 50 and the load pipe 20 and connect them to the heating pipe 40, so as to selectively determine whether the load pipe 20 needs to be heated during the magnetization process of the magnetic refrigeration generator 10.

[0078] In addition, the heating pipe 40 also includes a heat storage tank 43, which is located on the heating pipe 40 upstream of the inlet end or downstream of the outlet end of the magnetization auxiliary pipe 50. Specifically, the heat storage tank 43 is located on the heating input pipe 41, and the inlet end of the magnetization auxiliary pipe 50 is connected to the heating input pipe 41 downstream of the heat storage tank 43. Alternatively, the heat storage tank 43 can be located on the heating output pipe 42, and the outlet end of the magnetization auxiliary pipe 50 is connected to the heating output pipe 42 upstream of the heat storage tank 43.

[0079] Thus, by installing a heat storage tank 43 on the heating pipe 40, when the magnetized auxiliary pipe 50 is connected to the heating pipe 40, the heat generated by the magnetization of the magnetic refrigeration generator 10 heats the heat exchange medium, and most of the heated heat exchange medium can be stored in the heat storage tank 43. In this way, when the load pipe 20 needs to be heated, the heat exchange medium in the heat storage tank participates in the heating cycle, which can reduce the energy consumption of the magnetic refrigeration generator 10, and at the same time quickly heat the load pipe 20, further improving the heating efficiency.

[0080] In this embodiment, the magnetic refrigeration temperature control system also includes a demagnetizing auxiliary pipeline 60. The inlet and outlet ends of the demagnetizing auxiliary pipeline 60 are respectively connected to the cooling pipeline 30 at the upstream and downstream sides of the load pipeline 20. When the magnetic refrigeration generator 10 is in the demagnetizing process, the demagnetizing auxiliary pipeline 60 and the load pipeline 20 can be selectively connected to the cooling pipeline 30.

[0081] In this way, after the magnetic refrigeration generator 10 magnetizes and heats the load pipe 20, it needs to be demagnetized to facilitate cooling during the next magnetization process. In order to prevent the low-temperature heat exchange medium from entering the load pipe 20 and causing cooling during the demagnetization process, a demagnetization auxiliary pipe 60 is connected to the cooling pipe 30 at the upstream and downstream sides of the load pipe 20. In this way, after the magnetic refrigeration generator 10 absorbs heat and cools the heat exchange medium during the demagnetization process, the heat exchange medium can pass through the demagnetization auxiliary pipe 60 instead of passing through the load pipe 20, thereby avoiding affecting the temperature of the load pipe 20.

[0082] Specifically, the inlet and outlet ends of the demagnetizing auxiliary pipeline 60 are connected to the cooling output pipe 32 and the cooling output pipe 32, respectively; when the magnetic refrigeration generator 10 is in the demagnetizing process, the cooling input pipe 31, the load pipeline 20 and the cooling output pipe 32 are connected; or, when the magnetic refrigeration generator 10 is in the demagnetizing process, the cooling input pipe 31, the demagnetizing auxiliary pipeline 60 and the cooling output pipe 32 are connected.

[0083] Thus, by connecting the outlet end of the demagnetizing refrigeration channel to the inlet end of the load pipeline 20 via the cooling input pipe 31, and connecting the outlet end of the load pipeline 20 to the inlet end of the demagnetizing refrigeration channel via the cooling output pipe 32, the heat exchange medium can circulate within the demagnetizing refrigeration channel, cooling input pipe 31, load pipeline 20, and cooling output pipe 32. Connecting the demagnetizing auxiliary pipe 60 between the cooling input pipe 31 and the cooling output pipe 32 enables parallel connection between the demagnetizing auxiliary pipe 60 and the load pipeline 20. This facilitates switching between the demagnetizing auxiliary pipe 60 and the load pipeline 20 and their connection to the cooling pipeline 30, allowing selective cooling of the load pipeline 20 during the demagnetization process of the magnetic refrigeration generator 10.

[0084] In an optional embodiment, the heating pipe 40 further includes a cold storage unit 33, which is disposed on the cooling pipe 30 upstream of the inlet end or downstream of the outlet end of the demagnetizing auxiliary pipe 60. Specifically, the cold storage unit 33 is disposed on the cooling input pipe 31, and the inlet end of the demagnetizing auxiliary pipe 60 is connected to the cooling input pipe 31 downstream of the cold storage unit 33. Alternatively, the cold storage unit 33 can be disposed on the cooling output pipe 32, and the outlet end of the demagnetizing auxiliary pipe 60 is connected to the cooling output pipe 32 upstream of the cold storage unit 33.

[0085] Thus, by installing a cold storage tank 33 on the cooling pipe 30, when the demagnetizing auxiliary pipe 60 is connected to the cooling pipe 30, after the magnetic refrigeration generator 10 demagnetizes and absorbs heat to cool the heat exchange medium, most of the cooled heat exchange medium can be stored in the cold storage tank 33. In this way, when the load pipe 20 needs to be cooled, the heat exchange medium in the cold storage tank participates in the cooling cycle, which can reduce the energy consumption of the magnetic refrigeration generator 10 and quickly cool the load pipe 20, further improving the cooling efficiency.

[0086] In order to enable the connection and selective conduction of the cooling input pipe 31 with the load pipe 21 or the demagnetizing auxiliary pipe 60, the magnetic refrigeration temperature control system also includes a first multi-way valve 70. The outlet end of the cooling input pipe 31 is connected to port a of the first multi-way valve 70, port b of the first multi-way valve 70 is connected to the inlet end of the demagnetizing auxiliary pipe 60, and port c of the first multi-way valve 70 is connected to the load pipe 21.

[0087] In order to enable the connection and selective conduction of the heating input pipe 41 with the load pipe 21 or the magnetization pipe, the magnetic refrigeration temperature control system also includes a second multi-way valve 80. The outlet end of the heating input pipe 41 is connected to port a of the second multi-way valve 80, port b of the second multi-way valve 80 is connected to the inlet end of the magnetization auxiliary pipe 50, and port c of the second multi-way valve 80 is connected to the load pipe 21.

[0088] It is understood that the load tube 21 has two inlet ends. One inlet end of the load tube 21 is connected to port c of the first multi-way valve 70, and the other inlet end of the load tube 21 is connected to port c of the second multi-way valve 80.

[0089] In order to enable the connection between the load tube 21 and the cooling output tube 32 or the heating output tube 42 and to select one of them for conduction, the magnetic refrigeration temperature control system also includes a third multi-way valve 90. The outlet end of the load tube 21 is connected to port c of the third multi-way valve 90, port b of the third multi-way valve 90 is connected to the inlet end of the cooling output tube 32, and port a of the third multi-way valve 90 is connected to the inlet end of the heating output tube 42.

[0090] Based on the above magnetic refrigeration temperature control system, the flow direction of the heat exchange medium includes the following stages:

[0091] During the demagnetizing refrigeration stage, ports B and C of the demagnetizing refrigeration channel are both open. Ports A and D of the magnetizing heating channel are both closed. Ports a and c of the first multi-way valve 70 are both open for conduction, while port b is closed. Port c of the second multi-way valve 80 is closed, and the states of ports a and b are not restricted. Ports b and c of the third multi-way valve 90 are both open for conduction, while port a is closed. At this time, the heat exchange medium in the heat exchange chamber is demagnetized by the magnetic refrigeration generator 10 and absorbs its own heat, and then cools down. It flows out from port B of the demagnetizing refrigeration channel into the cooling input pipe 31 and reaches the cold storage 33. Then it enters the load pipe 21 through ports a and c of the first multi-way valve 70. Then it flows through the heater 23 for heating by the pump 22 and then through the temperature detection element 24 to reach the load 25 to cool down the load 25. Then it enters the cooling output pipe 32 through ports c and b of the third multi-way valve 90. Finally, it returns to the heat exchange chamber through port C of the demagnetizing refrigeration channel, completing one cooling cycle for the load 25.

[0092] During the magnetization stage, ports A and D of the magnetization heating channel are both open. Ports B and C of the demagnetization cooling channel are both closed. The states of ports a, b, and c of the first multi-way valve 70 are not restricted. Ports b and a of the second multi-way valve 80 are both open, and port c is closed. The states of ports a, b, and c of the third multi-way valve 90 are not restricted. At this time, the magnetic refrigeration generator 10 magnetizes and releases heat. The heat exchange medium in the heat exchange chamber absorbs the heat released during the magnetization of the magnetic refrigeration generator 10 and rises in temperature. Then, it flows out through port D of the magnetization heating channel into the heating input pipe 41 and reaches the heat storage tank 43. Then, it enters the magnetization auxiliary channel through ports b and a of the second multi-way valve 80, and finally flows back into the heat exchange chamber through port A of the magnetization heating channel, realizing the demagnetization and remagnetization of the magnetic refrigeration generator 10 to facilitate the next cooling cycle of the load 25.

[0093] During the magnetization heating stage, ports A and D of the magnetization heating channel are both open. Ports B and C of the demagnetization cooling channel are both closed. Port C of the first multi-way valve 70 is closed, while the states of ports A and B are not restricted. Ports B and C of the second multi-way valve 80 are both open for conduction, while port A is closed. Ports C and A of the third multi-way valve 90 are both open for conduction, while port B is closed. At this time, the heat exchange medium in the heat exchange chamber absorbs the heat released when the magnetic refrigeration generator 10 is magnetized and rises in temperature. Then, it flows out through port D of the magnetized heating channel into the heating input pipe 41 to reach the heat storage tank 43. Then, it enters the load pipe 21 through ports b and c of the second multi-way valve 80. After being heated by the heater 23 through the action of the pump 22, it reaches the load 25 through the temperature detection element 24 to cool down the load 25. Then, it enters the heating output pipe 42 through ports c and a of the third multi-way valve 90. Finally, it returns to the heat exchange chamber through port A of the magnetized heating channel, completing one heating cycle for the load 25.

[0094] During the demagnetization stage, ports B and C of the demagnetizing refrigeration channel are both open. Ports B and C of the magnetizing heating channel are both closed. Ports a and b of the first multi-way valve 70 are both open for conduction, while port c is closed. The states of ports a, b, and c of the second multi-way valve 80 are not restricted. The states of ports a, b, and c of the third multi-way valve 90 are not restricted. At this time, the magnetic refrigeration generator 10 demagnetizes and absorbs heat. The heat of the heat exchange medium in the heat exchange chamber is absorbed by the magnetic refrigeration generator 10 and cooled down. Then, it flows out through port B of the demagnetizing refrigeration channel into the cooling input pipe 31 and reaches the cold storage 33. Then, it enters the demagnetizing auxiliary channel through ports a and b of the first multi-way valve 70, and finally flows back into the heat exchange chamber through port C of the demagnetizing refrigeration channel, realizing the remagnetization of the magnetic refrigeration generator 10 after magnetization, so as to facilitate the next heating cycle of the load 25.

[0095] Finally, it should be noted that in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0096] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A magnetic refrigeration temperature control system, characterized in that, It includes a magnetic refrigeration generator (10), a load pipeline (20), a cooling pipeline (30), and a heating pipeline (40). The magnetic refrigeration generator (10) includes a demagnetizing refrigeration channel and a magnetizing heating channel; The load pipeline (20) is connected to the demagnetizing refrigeration channel and the magnetizing heating channel respectively through the parallel cooling pipeline (30) and the heating pipeline (40); When the magnetic refrigeration generator (10) is in the demagnetization process, the cooling pipe (30) is connected to the load pipe (20); When the magnetic refrigeration generator (10) is in the magnetization process, the heating pipe (40) is connected to the load pipe (20); The load line (20) includes a load line (21), a load (25), and a temperature controller; The load tube (21) is connected to the demagnetizing refrigeration channel and the magnetizing heating channel respectively through the parallel cooling pipe (30) and the heating pipe (40); When the magnetic refrigeration generator (10) is in the demagnetization process and the cooling pipe (30) is connected to the load pipe (21), the temperature value of the heat exchange medium in the load pipe (21) is the first temperature value. When the magnetic refrigeration generator (10) is in the magnetization process and the heating pipe (40) is connected to the load pipe (21), the temperature value of the heat exchange medium in the load pipe (21) is the second temperature value. The load (25) and the temperature controller are both connected to the load tube (21). The temperature controller is used to heat or cool the heat exchange medium so that the absolute value of the difference between the first temperature value and the first preset temperature is less than or equal to the preset absolute difference, and the absolute value of the difference between the second temperature value and the second preset temperature is less than or equal to the preset absolute difference.

2. The magnetic refrigeration temperature control system according to claim 1, characterized in that, The magnetic refrigeration temperature control system also includes a magnetization auxiliary pipeline (50), the inlet end and outlet end of which are respectively connected to the heating pipeline (40) at the upstream and downstream sides of the load pipeline (20); When the magnetic refrigeration generator (10) is in the magnetization process, the magnetization auxiliary pipeline (50) and the load pipeline (20) may be connected to the heating pipeline (40) in one of them.

3. The magnetic refrigeration temperature control system according to claim 2, characterized in that, The heating pipe (40) includes a heating input pipe (41) and a heating output pipe (42). The inlet and outlet ends of the heating input pipe (41) are respectively connected to the outlet end of the magnetized heating channel and the inlet end of the load pipe (20); The inlet and outlet ends of the heating output tube (42) are respectively connected to the outlet end of the load pipeline (20) and the inlet end of the magnetized heating channel; The inlet and outlet ends of the magnetization auxiliary pipeline (50) are respectively connected to the heating input pipe (41) and the heating output pipe (42). When the magnetic refrigeration generator (10) is in the magnetization process, the heating input pipe (41), the load pipe (20) and the heating output pipe (42) are connected, or the heating input pipe (41), the magnetization auxiliary pipe (50) and the heating output pipe (42) are connected.

4. The magnetic refrigeration temperature control system according to claim 2, characterized in that, The heating pipeline (40) also includes a heat storage device (43), which is located on the heating pipeline (40) at a position upstream of the inlet end or downstream of the outlet end of the magnetization auxiliary pipeline (50).

5. The magnetic refrigeration temperature control system according to claim 1, characterized in that, The magnetic refrigeration temperature control system also includes a demagnetizing auxiliary pipeline (60), the inlet end and outlet end of which are respectively connected to the cooling pipeline (30) at the upstream and downstream sides of the load pipeline (20); When the magnetic cooling generator (10) is in the demagnetization process, the demagnetization auxiliary pipeline (60) and the load pipeline (20) may be connected to the cooling pipeline (30) in one of them.

6. The magnetic refrigeration temperature control system according to claim 5, characterized in that, The heating pipe (40) includes a cooling input pipe (31) and a cooling output pipe (32); The inlet and outlet ends of the cooling input pipe (31) are respectively connected to the outlet end of the demagnetizing refrigeration channel and the inlet end of the load pipe (20); The inlet and outlet ends of the cooling output pipe (32) are respectively connected to the outlet end of the load pipe (20) and the inlet end of the demagnetizing cooling channel; The inlet and outlet ends of the demagnetizing auxiliary pipeline (60) are respectively connected to the cooling input pipe (31) and the cooling output pipe (32). When the magnetic cooling generator (10) is in the demagnetization process, the cooling input pipe (31), the load pipe (20) and the cooling output pipe (32) are connected, or the cooling input pipe (31), the demagnetization auxiliary pipe (60) and the cooling output pipe (32) are connected.

7. The magnetic refrigeration temperature control system according to claim 5, characterized in that, The heating pipeline (40) also includes a cold storage device (33), which is located on the cooling pipeline (30) at a position upstream of the inlet end or downstream of the outlet end of the demagnetizing auxiliary pipeline (60).

8. The magnetic refrigeration temperature control system according to claim 1, characterized in that, The temperature controller is an electric heater (23).

9. The magnetic refrigeration temperature control system according to claim 1, characterized in that, The load line (20) also includes a pump (22) and / or a temperature sensor (24), the pump (22) being used to drive the flow of the heat exchange medium, and the temperature sensor (24) being used to detect the real-time temperature of the heat exchange medium.

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