Heating device

Abstract

The heating device comprises a base, a driving mechanism and a first heating mechanism, the base comprises a fixed part and a movable part, and the fixed part is used for being connected with a liquid storage device; the first heating mechanism is arranged between the fixed part and the movable part, and the driving mechanism can drive the first heating mechanism to be switched between a first position and a second position; the driving mechanism comprises a shape memory alloy spring and a bias part, the shape memory alloy spring and the bias part are both arranged between the fixed part and the movable part, the shape memory alloy spring is configured to serve as a second heating mechanism, and the bias part is configured to bias the shape memory alloy spring from the first state to the second state. According to the heating device disclosed by the invention, through the synergistic effect of the shape memory alloy spring and the bias part, the expansion and contraction of the heating device in the working state are realized, and the adaptability requirement on the working space is reduced. The shape memory alloy spring integrates the heating function and the driving function, and efficient, compact and intelligent self-adaptive heating can be achieved.

Description

Technical Field

[0001] This application relates to the field of heating device technology, and more specifically, to a heating device. Background Technology

[0002] In hydraulic lubrication systems, the viscosity of the oil is crucial for normal system operation. When the oil temperature is too low, the viscosity is too high, which can lead to: difficulty in pumping oil, cavitation, and pump damage; high system starting pressure and high energy consumption; poor fluidity and sluggish actuator operation.

[0003] In existing technologies, fluid storage tanks typically use heaters of fixed dimensions, such as flange heating tubes or immersion heating rods. These traditional solutions have the following drawbacks: limited functionality, usually only providing heating, with on / off control relying on an independent temperature control system, resulting in a complex overall structure; low energy efficiency, as the heating length cannot be adaptively adjusted to the working space; and large size, as the fixed heating length requires sufficient space for heater replacement, and the rigid structure makes it difficult to achieve optimal layout in space-constrained, irregular liquid storage devices, easily leading to uneven temperature fields and localized overheating.

[0004] Therefore, how to adjust the heating length to broaden the application range of the heating device has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the purpose of this application is to disclose a heating device that adjusts the heating length to broaden the applicability of the heating device.

[0006] To achieve the aforementioned objective, this application provides the following technical solution:

[0007] A heating device includes a base, a driving mechanism, and a first heating mechanism. The base includes a fixed part and a movable part, which are disposed opposite to each other. The fixed part is used to connect to a liquid storage device.

[0008] The first heating mechanism is disposed between the fixed part and the movable part, and the driving mechanism can drive the first heating mechanism to switch between a first position and a second position; in the first position, the first heating mechanism has a first heating length, and in the second position, the first heating mechanism has a second heating length, the second heating length being greater than the first heating length;

[0009] The driving mechanism includes a shape memory alloy spring and a biasing member. Both the shape memory alloy spring and the biasing member are disposed between the fixed part and the movable part. The shape memory alloy spring is configured as a second heating mechanism, and the biasing member is configured to bias the shape memory alloy spring from a first state to a second state.

[0010] Optionally, in the above heating device, when the shape memory alloy spring is heated to a temperature higher than the end temperature of the austenitic phase transformation, it exhibits its high-temperature memory shape. The shape memory alloy spring has a first length. When the temperature of the shape memory alloy spring is cooled to a temperature lower than the end temperature of the martensitic phase transformation, it recovers to a second length under the action of the biasing element. The second length is less than the first length.

[0011] Optionally, in the above heating device, the first heating mechanism includes at least one heating component, the heating component includes a first heating element and a second heating element, the first end of the first heating element is connected to the fixed part, the first end of the second heating element is connected to the movable part, and the second end of the second heating element is slidably disposed inside the first heating element.

[0012] Optionally, in the above heating device, a guide structure is provided between the first heating element and the second heating element so that the first heating element can move along the axial direction of the second heating element.

[0013] Optionally, in the above heating device, the guiding structure includes a guide groove and a guide protrusion. The guide groove is disposed on one of the first heating element and the second heating element, and the guide groove extends along the axial direction of the heating element. The guide protrusion is disposed on the other element and cooperates with the guide groove.

[0014] Optionally, in the above-described heating device, the heating components include a plurality of components spaced circumferentially along the fixed portion.

[0015] Optionally, in the above heating device, the biasing element is a biasing spring, which is coaxially arranged with the shape memory alloy spring.

[0016] Optionally, in the above-described heating device, the fixing part is detachably connected to the liquid storage device.

[0017] Optionally, in the above heating device, the heating device includes a control mechanism disposed on the fixing part. The control mechanism includes a drive circuit and a control module. The drive circuit is connected to the shape memory alloy spring and the first heating mechanism respectively. The control module is communicatively connected to the drive circuit and is used to control the drive circuit to supply power to the shape memory alloy spring and the first heating mechanism.

[0018] Optionally, in the above heating device, the housing of the control mechanism is a metal housing, and the housing is constructed as a heat-conducting wall.

[0019] As can be seen from the above scheme, the heating device disclosed in this application uses a shape memory alloy spring as the second heating mechanism and also as the driving mechanism for extending the first heating mechanism, reducing mechanical connection points and improving the reliability and stability of the system. The shape memory alloy spring integrates heating and driving functions, and can complete the functions of heating and changing the heating length and heating area of ​​the first heating mechanism with a single energization, so as to achieve efficient, compact, and intelligent adaptive heating. It is suitable for fields such as smart home appliances, medical liquid storage devices, and industrial instruments with dual requirements for space and heating performance. The setting of the bias component can ensure that the shape memory alloy spring returns to its initial position after cooling, ensuring the reliability of each working cycle. Using a shape memory alloy spring as the driving mechanism is noiseless and wear-free, which can extend its service life. The heating device is retractable, which can reduce the space requirements for replacing the heating device and help to form a more uniform temperature field in the fluid, reducing the occurrence of local overheating. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the heating device disclosed in the embodiments of this application. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the heating device disclosed in the embodiments of this application. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of the structure of the heating device disclosed in the embodiments of this application. Figure 3 ;

[0024] Figure 4 for Figure 3 Sectional view of AA;

[0025] Figure 5 This is a schematic diagram of the structure of the heating device disclosed in the embodiments of this application. Figure 4 ;

[0026] Figure 6 for Figure 5 A magnified view of part B in the image;

[0027] Figure 7 This is a schematic diagram showing the heating device disclosed in the embodiments of this application in its initial state and extended state.

[0028] Among them, 100 is the base, 110 is the fixed part, and 120 is the movable part;

[0029] 200 is the control mechanism;

[0030] 300 is the drive mechanism, 310 is the shape memory alloy spring, and 320 is the biasing component;

[0031] 400 is the first heating mechanism, 410 is the heating assembly, 411 is the first heating element, and 412 is the second heating element. Detailed Implementation

[0032] The core of this application is to disclose a heating device that adjusts the heating length to broaden the applicability of the heating device.

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] like Figure 1 and Figure 3 As shown in the figure, this application discloses a heating device, including a base 100, a drive mechanism 300, and a first heating mechanism 400. The base 100 includes a fixed part 110 and a movable part 120, which are arranged opposite to each other, and preferably parallel to each other. The fixed part 110 is used to connect to a liquid storage device, specifically, it is detachably connected to the liquid storage device, such as... Figure 2 As shown, the liquid storage device includes, but is not limited to, oil tanks, storage tanks, etc., to fix the entire heating device on the liquid storage device containing the medium to be heated.

[0035] like Figure 5 As shown, the first heating mechanism 400 is disposed between the fixed part 110 and the movable part 120. The driving mechanism 300 can drive the first heating mechanism 400 to switch between a first position and a second position. In the first position, the first heating mechanism 400 has a first heating length. In the second position, the first heating mechanism 400 has a second heating length. The second heating length is greater than the first heating length. That is, under the drive of the driving mechanism 300, the length and heating area of ​​the first heating mechanism 400 will change.

[0036] The drive mechanism 300 includes a shape memory alloy spring 310 and a biasing member 320, both disposed between the fixed portion 110 and the movable portion 120. The shape memory alloy spring 310 is configured as a second heating mechanism, and the biasing member 320 is configured to bias the shape memory alloy spring 310 from a first state to a second state. The biasing member 320 biases the spring. In the initial state, the biasing member 320 is in a pre-compressed state to provide auxiliary restoring force when the shape memory alloy spring 310 cools and contracts, ensuring that it can stably return to its initial compressed state.

[0037] In practical use, the fixing part 110 is installed in a liquid storage device containing the medium to be heated. At this time, both the shape memory alloy spring 310 and the first heating mechanism 400 are de-energized. When it is necessary to heat the medium, the first heating mechanism 400 is energized, and the shape memory alloy spring 310 is heated. At this time, the shape memory alloy spring 310 generates Joule heat. The shape memory alloy spring 310 acts as a second heating mechanism, working together with the first heating mechanism 400 to heat the medium to be heated.

[0038] When the heating temperature of the shape memory alloy spring 310 reaches the austenitic phase initiation temperature, the spring transforms from martensite to austenite. This transformation continues until the temperature reaches the austenitic phase termination temperature, at which point the spring returns to its high-temperature memory shape. It should be noted that the memory shape of the shape memory alloy spring 310 is its maximum elongation state; in other words, the memory shape is the unwinding state of a helical structure.

[0039] During the transformation of the shape memory alloy spring 310 from martensite to austenite, the spring is in an uncoiled state, and the biasing element 320 is in a stretched state. This drives the first heating mechanism 400 to switch from a first position to a second position, meaning the length of the first heating mechanism 400 increases, thus increasing the overall length of the heating device and the heating area in contact with the medium to be heated, to accommodate the volume of the medium in the working device. When the medium to be heated reaches the preset temperature, the power to the shape memory alloy spring 310 and the first heating mechanism 400 is cut off. The spring 310 begins to cool, and its stiffness and restoring force decrease. Under the action of the biasing element 320, the spring 310 is compressed, causing the first heating mechanism 400 to shorten. The spring 310 returns to its initial state, and the overall length of the heating device shortens. Specifically, as shown... Figure 7As shown in the figure, the upper figure is the initial state, that is, the shape memory alloy spring 310 is in the martensitic phase, and the lower figure is the shape memory alloy spring 310 in the austenitic phase. It can be seen from the figure that the heating device is shorter in the initial state.

[0040] The heating device disclosed in this application uses a shape memory alloy spring 310 as a second heating mechanism, which works in conjunction with the first heating mechanism 400 to extend and retract the heating device during operation, reducing the adaptability requirements for the working space. The shape memory alloy spring 310 can be flexibly energized according to the volume of the medium to be heated. The shape memory alloy spring 310 and the biasing component 320 work together to drive the first heating mechanism 400 to switch between a first position and a second position, thereby changing the heating length and heating area of ​​the first heating mechanism 400. The combined action of the shape memory alloy spring 310 and the biasing component 320 makes the entire heating device extendable and retractable, reducing the space requirements for changing the heating device in the oil storage tank. Simultaneously, the extendable and retractable heating device allows for more uniform heating of the medium. By integrating heating and driving functions into a single component, the shape memory alloy spring 310, the overall system architecture is simplified. By changing the state of the shape memory alloy spring 310 through energization to adaptively adjust the heating length, the heater can achieve optimal layout in irregular liquid storage devices with limited space.

[0041] The heating device disclosed in this application uses a shape memory alloy spring 310 as a second heating mechanism and simultaneously as a driving mechanism for extending the first heating mechanism 400. This reduces mechanical connection points and improves the reliability and stability of the system. The shape memory alloy spring 310 integrates heating and driving functions, and with a single energization, it can complete the functions of heating and changing the heating length and heating area of ​​the first heating mechanism 400 to achieve efficient, compact, and intelligent adaptive heating. It is suitable for fields such as smart home appliances, medical liquid storage devices, and industrial instruments that have dual requirements for space and heating performance. The biasing component 320 ensures that the shape memory alloy spring 310 returns to its initial position after cooling, ensuring the reliability of each working cycle. Using the shape memory alloy spring 310 as a driving mechanism results in no noise and no wear, extending its service life. The heating device is extendable, reducing the space requirements for replacing the heating device and helping to form a more uniform temperature field in the fluid, reducing the occurrence of local overheating. Through the synergistic action of the shape memory alloy spring and the biasing component, the heating device can extend and retract during operation, reducing the adaptability requirements for the working space.

[0042] The heating device disclosed in this application, when the heating temperature of the shape memory alloy spring 310 is higher than the austenitic phase transformation end temperature, has a first length in its memory shape when in a free state. When the heating temperature is lower than the martensitic phase transformation end temperature, the shape memory alloy spring 310 can be biased to a second length by the biasing member 320. The second length can be smaller than the first length, that is, the memory shape of the shape memory alloy spring 310 is in its maximum extended state. By heating the shape memory alloy spring 310, when the heating temperature reaches the austenitic phase transformation start temperature of the shape memory alloy spring 310, the shape memory alloy spring 310 begins to elongate, simultaneously causing the first heating mechanism 400 to elongate, thereby changing the heating length and heating area of ​​the first heating mechanism 400. After the heating process is completed, the power to the shape memory alloy spring 310 is turned off, and the shape memory alloy spring 310 begins to cool, its stiffness and restoring force decreasing. At this time, the stretched bias member 320 releases its stored potential energy, generates a restoring force, pulls the movable part 120 back, and compresses the shape memory alloy spring 310 until the bias member 320 returns to its initial compressed state.

[0043] In some specific embodiments, such as Figure 5 and Figure 6 As shown, the first heating mechanism 400 includes at least one heating assembly 410. The heating assembly 410 includes a first heating element 411 and a second heating element 412. The first end of the first heating element 411 is connected to the fixed part 110, and the first end of the second heating element 412 is connected to the movable part 120. The second end of the second heating element 412 is slidably disposed inside the first heating element 411. When the shape memory alloy spring 310 is energized and heated, when the austenitic phase transformation start temperature of the shape memory alloy spring 310 is reached, the shape memory alloy spring 310 begins to elongate. Since the shape memory alloy spring 310 is connected to the movable part 120, the elongation of the shape memory alloy spring 310 drives the movable part 120 to move, thereby causing the second heating element 412 connected to the movable part 120 to slide relative to the first heating element 411, making the length of the second heating element 412 longer. This increases the heating area between the second heating element 412 and the medium to be heated, which helps to form a more uniform temperature field in the fluid and reduces the occurrence of local overheating.

[0044] In order to enable the second heating element 412 to move along the axial direction of the first heating element 411 without rotating during the movement, in some specific embodiments, a guide structure is provided between the first heating element 411 and the second heating element 412.

[0045] In some specific embodiments, the guiding structure includes a guide groove and a guide protrusion. The guide groove is disposed on one of the first heating element 411 and the second heating element 412, and the guide protrusion is disposed on the other. The guide groove extends axially along the heating element, and the guide protrusion cooperates with the guide groove. For example, an axially extending guide groove is provided on the inner wall of the second heating element 412, and a guide protrusion that cooperates with the guide groove is provided on the inner wall of the first heating element 411.

[0046] In some other specific embodiments, the cross-sectional shape of the first heating element 411 and the second heating element 412 can be a non-circular cross-section, such as a rectangle or pentagon, and the two shapes are matched to prevent relative rotation between them.

[0047] To provide a more uniform temperature field, the heating assembly 410 includes a plurality of components spaced apart circumferentially along the fixing portion 110. Preferably, the heating assemblies 410 are evenly arranged circumferentially along the fixing portion 110. In some specific embodiments, such as Figure 4 and Figure 5 As shown, the heating assembly 410 includes four circumferentially spaced components arranged along the fixing part 110. The number shown in the figure is only an example, and the specific number can be adjusted according to actual needs.

[0048] In some specific embodiments, the fixing part 110 is detachably connected to the liquid storage device, specifically through a flange connection or a threaded connection. The specific connection method can be determined according to the actual situation.

[0049] In some specific embodiments, the heating device includes a control mechanism 200, which includes a drive circuit and a control module. The drive circuit is connected to both the shape memory alloy spring 310 and the first heating mechanism 400. The control module is communicatively connected to the drive circuit and is used to control the drive circuit to supply power to the shape memory alloy spring 310 and the first heating mechanism 400. The control mechanism 200 is configured to control the drive circuit to change the energized and de-energized states of the shape memory alloy spring 310 and the first heating mechanism 400.

[0050] In some specific embodiments, the housing of the control mechanism 200 is a metal housing, which is constructed as a heat-conducting wall to transfer the heat generated inside to the external liquid for heating the medium to be heated. For example, the housing may be made of aluminum alloy or copper.

[0051] It should be noted that the control module is electrically connected to the drive circuit. The control module is configured to receive external trigger signals (e.g., instructions from a host computer or manual switch signals) and control the drive circuit to output drive current to the shape memory alloy spring 310 or the first heating mechanism 400 according to the trigger signal. The control module can also receive feedback signals from the temperature sensor in the medium to be heated for closed-loop temperature control.

[0052] The heating device disclosed in this application uses a shape memory alloy spring 310 made of a Ni-Ti based alloy with a phase transformation temperature of 50°C-80°C. The first heating element 411 and the second heating element 412 are preferably made of stainless steel or aluminum alloy with good thermal conductivity. When heating oil, to ensure the quality of the oil, the power density is usually set to 0.7 W / cm³. 2 The biasing component 320 is made of heat-resistant ordinary stainless steel spring. Its stiffness coefficient needs to be precisely designed based on the driving force of the shape memory alloy spring 310 and the system friction force to ensure reliable reset and without affecting normal elongation.

[0053] It should be noted that the various embodiments described in this specification are the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other.

[0054] The terminology used in the above embodiments is for the purpose of describing specific embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context clearly indicates otherwise. It should also be understood that in the embodiments of this application, "one or more" refers to one, two, or more; "and / or" describes the relationship between related objects, indicating that three relationships may exist; for example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0055] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0056] The "multiple" mentioned in the embodiments of this application refers to two or more. It should be noted that in the description of the embodiments of this application, terms such as "first" and "second" are used only for the purpose of distinguishing descriptions and should not be construed as indicating or implying relative importance, nor should they be construed as indicating or implying order.

[0057] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A heating device, characterized in that, It includes a base (100), a drive mechanism (300), and a first heating mechanism (400). The base (100) includes a fixed part (110) and a movable part (120). The fixed part (110) and the movable part (120) are arranged opposite to each other. The fixed part (110) is used to connect to the liquid storage device. The first heating mechanism (400) is disposed between the fixed part (110) and the movable part (120), and the driving mechanism (300) can drive the first heating mechanism (400) to switch between a first position and a second position; in the first position, the first heating mechanism (400) has a first heating length, and in the second position, the first heating mechanism (400) has a second heating length, the second heating length being greater than the first heating length; The drive mechanism (300) includes a shape memory alloy spring (310) and a biasing member (320). The shape memory alloy spring (310) and the biasing member (320) are both disposed between the fixed part (110) and the movable part (120). The shape memory alloy spring (310) is configured as a second heating mechanism, and the biasing member (320) is configured to bias the shape memory alloy spring (310) from a first state to a second state.

2. The heating device as described in claim 1, characterized in that, When the shape memory alloy spring (310) is heated to a temperature higher than the end temperature of the austenitic phase transformation, it exhibits its high-temperature memory shape. The shape memory alloy spring (310) has a first length. When the temperature of the shape memory alloy spring (310) is cooled to a temperature lower than the end temperature of the martensitic phase transformation, it recovers to a second length under the action of the biasing member (320). The second length is less than the first length.

3. The heating device as described in claim 1, characterized in that, The first heating mechanism (400) includes at least one heating component (410), the heating component (410) includes a first heating element (411) and a second heating element (412), the first end of the first heating element (411) is connected to the fixed part (110), the first end of the second heating element (412) is connected to the movable part (120), and the second end of the second heating element (412) is slidably disposed inside the first heating element (411).

4. The heating device as described in claim 3, characterized in that, A guide structure is provided between the first heating element (411) and the second heating element (412) so that the first heating element (411) can move along the axial direction of the second heating element (412).

5. The heating device as described in claim 4, characterized in that, The guiding structure includes a guide groove and a guide protrusion. The guide groove is disposed on one of the first heating element (411) and the second heating element (412) and extends along the axial direction of the heating element. The guide protrusion is disposed on the other and cooperates with the guide groove.

6. The heating device as described in claim 3, characterized in that, The heating assembly (410) includes a plurality of components spaced circumferentially along the fixing portion (110).

7. The heating device as described in claim 4, characterized in that, The biasing component (320) is a biasing spring, which is coaxially arranged with the shape memory alloy spring (310).

8. The heating device according to any one of claims 1-7, characterized in that, The fixing part (110) is detachably connected to the liquid storage device.

9. The heating device as described in claim 8, characterized in that, The heating device includes a control mechanism (200), which is disposed on the fixing part (110). The control mechanism (200) includes a drive circuit and a control module. The drive circuit is connected to the shape memory alloy spring (310) and the first heating mechanism (400) respectively. The control module is communicatively connected to the drive circuit and is used to control the drive circuit to supply power to the shape memory alloy spring (310) and the first heating mechanism (400).

10. The heating device as described in claim 9, characterized in that, The housing of the control mechanism (200) is a metal housing, which is constructed as a heat-conducting wall.

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