Tubular heat source and heat uniformizing device
By designing a tubular heat source, using the phase transition conversion of the structure of the first copper tube around the second copper tube and the working medium, the shortcomings of the traditional heat source when providing highly uniform heating are solved, and the high measurement of the thermal expansion coefficient of the solid material is achieved accuracy.
Patent Information
- Application Number
- CN202323418377.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-14
AI Technical Summary
When traditional long-tube adjustable constant temperature heat sources provide highly uniform heating, it is difficult to meet the heat source requirements with a high aspect ratio, resulting in limited accuracy in measuring the thermal expansion coefficient of solid materials.
A tubular heat source is designed to surround the second copper tube through the first copper tube, and the phase transformation of the working medium is used to ensure the balanced transmission of heat. The specific structure includes a cylinder structure, a heating unit and a working medium.
The uniform heating of the solid sample to be tested in a slender rod is achieved, the accuracy of the measurement of the thermal expansion coefficient is improved, and the uniform heat transfer is ensured through the design of the copper tube and the phase transformation conversion of the working medium.
Smart Images
Figure CN222438621U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of detection technology, in particular to a tubular heat source and a heat uniforming device. Background Art
[0002] In the measurement of the thermal expansion coefficient of solid materials, a constant temperature heat source with a high aspect ratio is required to uniformly heat the thin and long rod-shaped solid sample to be tested, so as to accurately determine the linear expansion coefficient of the solid material under the action of temperature. The traditional long tube type adjustable constant temperature heat source tightly wraps the electric heating wire on the outer wall of the copper tube, or deposits a conductive film on the copper or other metal tubes with good thermal conductivity coated with an insulating dielectric layer for heating, and obtains the required constant temperature tubular heat source through the high thermal conductivity of the metal plate. However, due to the limited thermal conductivity of metal, it is difficult to achieve the requirement when a long tube diameter ratio heat source is required to have high uniformity. Utility Model Content
[0003] The embodiment of the utility model provides a tubular heat source and a heat uniforming device, wherein a first copper tube surrounds a second copper tube, and the fourth surface of the second copper tube is used to transfer heat to the outside, and combined with the phase change conversion of the working medium, the balance of heat provision can be ensured.
[0004] In a first aspect, an embodiment of the utility model provides a tubular heat source, including a column structure, a heating unit and a working medium;
[0005] The column structure includes a copper tube, a bottom plate and a cover plate; the copper tube includes a first copper tube and a second copper tube, the first copper tube and the second copper tube are both located on one side of the bottom plate, and the first copper tube surrounds the second copper tube, and the diameter of the first copper tube is greater than the diameter of the second copper tube; the cover plate is located on a side of the copper tube away from the bottom plate, the first end of the cover plate is connected to the first copper tube, and the second end of the cover plate is connected to the second copper tube;
[0006] The first copper tube includes a first side surface and a second side surface, and the first side surface is located on a side of the second side surface away from the second copper tube; the second copper tube includes a third side surface and a fourth side surface, and the third side surface is located on a side of the fourth side surface close to the first copper tube; the bottom plate includes a first bottom surface and a second bottom surface, and the first bottom surface is located on a side of the second bottom surface away from the cover plate; the cover plate includes a first cover plate surface and a second cover plate surface, and the first cover plate surface is located on a side of the second cover plate surface close to the bottom plate;
[0007] The inner cavity of the column structure includes the second side surface, the third side surface, a portion of the second bottom surface and the first cover surface;
[0008] The heating unit is located on a side of the first side away from the second side, and the heating unit is close to the bottom plate; the working medium is located in the inner cavity of the column structure, and the working medium includes a liquid working medium and / or a gaseous working medium and / or a gas-liquid mixed working medium;
[0009] The tubular heat source transfers heat to the outside through the fourth side.
[0010] Optionally, an extension length of the first copper tube along a first direction is greater than an extension length of the second copper tube along the first direction;
[0011] An angle exists between the extension direction of the cover plate and the second direction;
[0012] The first direction is the extending direction of the copper tube, and the second direction is perpendicular to the first direction.
[0013] Optionally, an angle between an extension direction of the cover plate and the second direction is 45°.
[0014] Optionally, the diameter of the second copper tube is D1, and the extension length of the second copper tube is L1, wherein L1 / D1≥20.
[0015] Optionally, the tubular heat source further includes at least one temperature acquisition unit, wherein the temperature acquisition unit is located on a side of the first side away from the second side, and the temperature acquisition unit is away from the bottom plate.
[0016] Optionally, the tubular heat source further comprises a heat-insulating layer, wherein the heat-insulating layer comprises a first heat-insulating section and a second heat-insulating section connected to each other;
[0017] The first heat-insulating sub-portion is located on a side of the first side surface away from the second side surface, the second heat-insulating sub-portion is located on a side of the first bottom surface away from the second bottom surface, and the first heat-insulating sub-portion covers the heating unit.
[0018] Optionally, the tubular heat source further includes an exhaust pipe, wherein the exhaust pipe is located on the cover plate and passes through the cover plate.
[0019] Optionally, the tubular heat source further includes a triangular valve, and the triangular valve is located at the exhaust port.
[0020] Optionally, the heating unit includes an electric heater.
[0021] An embodiment of the utility model provides a uniform heat device, comprising any tubular heat source described in the first aspect.
[0022] The embodiment of the utility model provides a tubular heat source, which includes a column structure, a heating unit and a working medium, and its main structure includes a copper tube, a bottom plate and a cover plate, and the copper tube includes a first copper tube and a second copper tube, and the first copper tube, the second copper tube, the bottom plate and the cover plate enclose a closed space as the inner cavity of the main structure in the tubular heat source. Specifically, it includes the second side of the first copper tube, the third side of the second copper tube, part of the second bottom surface of the bottom plate and the first cover plate surface of the cover plate. Further, the working medium is placed in the inner cavity, and the working medium includes a liquid working medium and / or a gaseous working medium and / or a gas-liquid mixed working medium, and a heating unit is also arranged around the cavity near the bottom of the first side. Based on different states, the state of the working medium is adjusted to different states and releases or absorbs different degrees of heat. The fourth surface of the second copper tube is used to transfer heat to the outside, and combined with the phase change conversion of the working medium, the balance of heat provision can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0024] Figure 1 It is a schematic diagram of the structure of a tubular heat source provided by an embodiment of the utility model;
[0025] Figure 2 yes Figure 1 A cross-sectional view along the section line A-A';
[0026] Figure 3 yes Figure 1 Another cross-sectional view along the section line AA';
[0027] Figure 4 It is a schematic structural diagram of another tubular heat source provided by an embodiment of the utility model;
[0028] Figure 5 yes Figure 4 A cross-sectional view along the section line BB';
[0029] Figure 6 It is a top view schematic diagram of a tubular heat source provided by an embodiment of the utility model;
[0030] Figure 7 It is a structural schematic diagram of a heat uniforming device provided in an embodiment of the utility model. DETAILED DESCRIPTION
[0031] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a system, product or device containing a series of units is not necessarily limited to those steps or units clearly listed, but may include other units that are not clearly listed or inherent to these products or devices.
[0033] Figure 1 This is a schematic diagram of the structure of a tubular heat source provided by an embodiment of the utility model. Figure 2 yes Figure 1 A cross-sectional view along the section line A-A', Figure 3 yes Figure 1 Another cross-sectional view along the section line A-A', refer to Figures 1 to 3As shown, the embodiment of the utility model provides a tubular heat source 10, which includes a column structure 100, a heating unit 200 and a working medium 300; the column structure 100 includes a copper tube 110, a bottom plate 120 and a cover plate 130; the copper tube 110 includes a first copper tube 111 and a second copper tube 112, the first copper tube 111 and the second copper tube 112 are both located on one side of the bottom plate 120, and the first copper tube 111 surrounds the second copper tube 112, and the diameter of the first copper tube 111 is larger than that of the second copper tube 112. The cover plate 130 is located on a side of the copper tube 110 away from the bottom plate 120, the first end 131 of the cover plate 130 is connected to the first copper tube 111, and the second end 132 of the cover plate 130 is connected to the second copper tube 112; the first copper tube 111 includes a first side 111a and a second side 111b, and the first side 111a is located on a side of the second side 111b away from the second copper tube 1112; the second copper tube 112 includes a third side 112a and a fourth side 112b , the third side surface 112a is located on the side of the fourth side surface 112b close to the first copper tube 111; the bottom plate 120 includes a first bottom surface 120a and a second bottom surface 120b, the first bottom surface 120a is located on the side of the second bottom surface 120b away from the cover plate 130; the cover plate 130 includes a first cover plate surface 130a and a second cover plate surface 130b, the first cover plate surface 130a is located on the side of the second cover plate surface 130b close to the bottom plate 120; the inner cavity of the column structure 110 includes the second side surface 110b, The third side surface 112a, part of the second bottom surface 120b and the first cover surface 130a; the heating unit 200 is located on the side of the first side surface 111a away from the second side surface 111b, and the heating unit 200 is close to the bottom plate 120; the working medium 300 is located in the inner cavity of the column structure 100, and the working medium 300 includes a liquid working medium and / or a gaseous working medium and / or a gas-liquid mixed working medium; the tubular heat source 10 transfers heat to the outside (not specifically shown in the figure) through the fourth side surface 112b.
[0034] Specifically, refer to Figure 1 and Figure 2 As shown, the tubular heat source 10 provided in the embodiment of the utility model includes a columnar structure 100, and a working medium 300 is placed in the cavity formed by the columnar structure 100. The working medium 300 in the cavity will produce corresponding gas phase conversion, that is, heat is generated through phase change latent heat, and the heat is released at the release point, thereby ensuring the heat supply of the heat source.
[0035] Specifically, the column structure 100 includes a copper tube 110, referring to Figure 1 and Figure 2As shown, the copper tube 110 includes a first copper tube 111 and a second copper tube 112, and the diameter of the first copper tube 111 is larger than the diameter of the second copper tube 112, and the first copper tube 111 surrounds the second copper tube 112, which can be understood as the first copper tube 111 is sleeved outside the second copper tube 112. It should be noted that Figure 1 In order to clearly observe the overall structure, the thickness of the copper tube 110 is not shown. Based on the thickness of the copper tube 110 and the corresponding surfaces of different copper tubes 110, reference can be made to Figure 2 For further information, refer to Figure 2 As shown, the first copper tube 111 includes a first side surface 111a and a second side surface 111b, the first side surface 111a is located on a side of the second side surface 111b away from the second copper tube 1112, and the second copper tube 112 includes a third side surface 112a and a fourth side surface 112b, the third side surface 112a is located on a side of the fourth side surface 112b close to the first copper tube 111. The second side surface 111b of the first copper tube 111 and the third side surface 112a of the second copper tube 112 are opposite and not fitted, that is, there is a certain space between the second side surface 111b and the third side surface 112a.
[0036] For further reference, Figure 1 and Figure 2 As shown, the column structure 100 further includes a bottom plate 120 and a cover plate 130. The first copper tube 111 and the second copper tube 112 are both located on one side of the bottom plate 120. The bottom plate 120 is equivalent to a support seat, which is used to support the first copper tube 111 and the second copper tube 112. The cover plate 130 is located on the side of the copper tube 110 away from the bottom plate 120, and the first end 131 of the cover plate 130 is connected to the first copper tube 111, and the second end 132 of the cover plate 130 is connected to the second copper tube 112. The cover plate 130 is equivalent to a capping structure. The space between the second side surface 111b and the third side surface 112a has the bottom plate 120 and the top plate 130, thereby forming a closed space, which is the inner cavity of the column structure 110.
[0037] Furthermore, the bottom plate 120 and the cover plate 130 can both be made of copper, and can be connected to the copper tube 110 by metal welding. Optionally, the first copper tube 111 and the second copper tube 112 can be made of red copper, and the bottom plate 120 and the cover plate 130 can also be made of red copper. Based on the specific material, the adaptability can be adjusted according to actual needs, and the embodiment of the utility model does not specifically limit this. Furthermore, the setting of the cover plate 130 is diverse, refer to Figure 2 As shown, a circular cover plate 130 may be used to seal and connect the first copper tube 111 and the second copper tube 112. Figure 3As shown, the cover plate 130 may be a part of the second copper tube 112 , and the second copper tube 112 is bent toward one side of the first copper tube 111 until it fits with the first copper tube 111 .
[0038] Specifically, the bottom plate 120 includes a first bottom surface 120a and a second bottom surface 120b, and the first bottom surface 120a is located on the side of the second bottom surface 120b away from the cover plate 130; the cover plate 130 includes a first cover plate surface 130a and a second cover plate surface 130b, and the first cover plate surface 130a is located on the side of the second cover plate surface 130b close to the bottom plate 120. For the inner cavity of the column structure 110, it is a closed space surrounded by the second side surface 110b, the third side surface 112a, part of the second bottom surface 120b and the first cover plate surface 130a. The working medium 300 included in the tubular heat source 10 is placed in the inner cavity, and the working medium 300 includes a liquid working medium and / or a gaseous working medium and / or a gas-liquid mixed working medium, that is, it includes a variety of different states. Furthermore, the tubular heat source 10 further includes a heating unit 200, and the heating unit 200 is located on the side of the first side 111a away from the second side 111b, and the heating unit 200 is close to the bottom plate 120, which can be understood as the heating unit 200 being closer to the bottom of the tubular heat source 10. Specifically, the liquid working medium in the inner cavity is heated by the heat generated by the heating unit 200, and the liquid working medium evaporates into a gaseous working medium by absorbing the latent heat of phase change, carrying a large amount of heat and diffusing at a high speed to the entire inner cavity, and the gaseous working medium condenses into a liquid state when encountering the low-temperature surface of the inner cavity, releasing a large amount of latent heat of phase change and then condensing into a liquid state, and then continuously flows back to the bottom of the inner cavity under the action of gravity. This heat transfer mainly relies on the vapor-liquid phase change of the working medium 300, and the thermal resistance is very small, so it has a high thermal conductivity and can quickly transfer heat to the entire area of the inner cavity.
[0039] Optionally, the heating unit 200 includes an electric heater.
[0040] Specifically, the heating unit 200 may be an electric heater, and the electric heater is connected to a controller, and the heating temperature of the heating unit 200 may be controlled by the controller according to demand. Furthermore, the number of the heating units 200 may be diverse, and the embodiment of the utility model does not specifically limit this.
[0041] Furthermore, the tubular heat source 10 can transfer heat to the outside (not specifically shown in the figure) through the fourth side surface 112b. Since the heat provided in the overall working state is balanced, the surface heat source provided on the fourth side surface 112b is balanced. The fourth side surface 112b is also nearly a cylindrical annular surface. The space provided by the fourth side surface 112b can be used to place an object to be measured (not specifically shown in the figure), and then measure the thermal expansion coefficient of the object to be measured, and the accuracy of the measurement is higher.
[0042] In summary, the embodiment of the utility model provides a tubular heat source, wherein the second side of the first copper tube, the third side of the second copper tube, part of the second bottom surface of the bottom plate and the first cover plate surface of the cover plate form an inner cavity of a columnar structure, and the working medium is placed in the inner cavity. The working medium includes a liquid working medium and / or a gaseous working medium and / or a gas-liquid mixed working medium, and a heating unit is arranged around the cavity near the bottom of the first side. Based on different states, the state of the working medium is adjusted to different states and releases or absorbs different degrees of heat. The fourth surface of the second copper tube is used to transfer heat to the outside, and combined with the phase change conversion of the working medium, the balance of heat provision can be ensured.
[0043] Continue to refer Figures 1 to 3 As shown, the extension length of the first copper tube 111 along the first direction X is greater than the extension length of the second copper tube 112 along the first direction X; the extension of the cover plate 130 forms an angle with the second direction Y; the first direction X is the extension direction of the copper tube 110, and the second direction Y is perpendicular to the first direction X.
[0044] Specifically, refer to Figure 2 and Figure 3 As shown, along the first direction X, the extension length of the first copper tube 111 is greater than the extension length of the second copper tube 112. Since the fourth side surface 112b of the second copper tube 112 is used for heat dissipation, the copper tube increases the length of the first copper tube 111 and decreases the length of the second copper tube 112, thereby avoiding unnecessary heat loss. It can be understood that the overall structure of the tubular heat source 10 can be expressed as the length of the inner copper tube is less than the length of the outer copper tube, and the inner side surface of the inner copper tube is used for heat dissipation. Adjusting the length of the outer copper tube slightly larger can reduce the heat loss of the inner surface of the inner copper tube at the cover plate.
[0045] For further reference, Figure 3 As shown, when the cover plate 130 and the second copper tube 112 are an integral structure, the cover plate 130 is formed by bending a portion of the second copper tube 112 , which causes the length of the second copper tube 112 to be shorter than that of the first copper tube 111 .
[0046] Furthermore, when the length of the first copper tube 111 is longer than the length of the second copper tube 112, there will be a certain angle between the extension direction of the cover plate 130 connecting the first copper tube 111 and the second copper tube 112 and the horizontal direction, such as Figure 3 As shown, Figure 3 The extension of the cover plate 130 forms an angle with the second direction Y, which can facilitate the connection between the first copper tube 111, the second copper tube 112 and the cover plate 130, that is, facilitate the sealing of the inner cavity.
[0047] The included angle between the extension direction of the cover plate 130 and the second direction Y is 45°.
[0048] Optional, reference Figure 3 As shown, the extension direction of the cover plate 130 can form an angle of 45° with the second direction Y. At this angle, the overall structure of the tubular heat source 10 is more regular.
[0049] Specifically, when the cover plate 130 and the second copper tube 112 are an integral structure, if the angle c is too large, while ensuring connection with the first copper tube 111, the larger the area of the second copper tube 112 that is bent to form the cover plate 130, the smaller the reserved area of the fourth side 112b will be, and the volume of the inner cavity will also be reduced, which will affect the tubular heat source 10 providing heat to the outside. If the angle c is too small, it proves that the greater the degree of bending of the second copper tube 112, the greater the process difficulty of metal bending and deformation, and the volume of the inner cavity will also be reduced. Therefore, an angle of 45° is selected as a moderate angle to ensure heat balance without adding additional process difficulty.
[0050] Continue to refer Figure 3 As shown, the diameter of the second copper tube 112 is D1, and the extension length of the second copper tube 112 is L1, wherein L1 / D1≥20.
[0051] Specifically, refer to Figure 3 As shown, the ratio of the extension length L1 of the second copper tube 112 to the diameter D1 of the second copper tube 112 is greater than 20, that is, the tubular heat source 10 provided in the embodiment of the utility model has a relatively high aspect ratio and can be used to measure the thermal expansion coefficient of a slender rod-shaped object to be tested.
[0052] Continue to refer Figures 1 to 3 As shown, the tubular heat source 10 further includes at least one temperature acquisition unit 400 . The temperature acquisition unit 400 is located on a side of the first side surface 111 a away from the second side surface 111 b , and the temperature acquisition unit 400 is away from the bottom plate 120 .
[0053] For further reference, Figures 1 to 3 As shown, the tubular heat source 10 also includes a temperature sensor 400, which can obtain the current temperature state of the tubular heat source 10 in real time. Among them, the temperature sensor 400 can be connected to the controller (specifically shown in the figure) for communication. The embodiment of the utility model does not make specific limitations on this based on the specific connection method, and the embodiment of the utility model does not make specific limitations on this based on the type of controller. Specifically, the temperature sensor 400 transmits the acquired temperature information to the controller, and the controller can adjust the temperature of the heating structure 200 according to the current temperature state and the required temperature state, so as to better control the tubular heat source 10 at the required temperature point and improve the working efficiency of the tubular heat source 10.
[0054] Figure 4 is a schematic diagram of the structure of another tubular heat source provided by an embodiment of the utility model. Figure 5 yes Figure 4 A cross-sectional view along the section line BB', Figure 6 is a top view schematic diagram of a tubular heat source provided by an embodiment of the utility model, referring to Figures 4 to 6 As shown, the tubular heat source 10 also includes an insulation layer 500, which includes a first insulation section 510 and a second insulation section 520 that are interconnected; the first insulation section 510 is located on a side of the first side 111a away from the second side 111b, and the second insulation section 520 is located on a side of the first bottom surface 120a away from the second bottom surface 120b, and the first insulation section 510 covers the heating unit 200.
[0055] Among them, reference Figures 4 to 6 As shown, the tubular heat source 10 further includes a heat preservation layer 500, which covers the bottom plate 120 and the outside of the first copper tube 111, thereby reducing unnecessary heat loss of the tubular heat source 10 and ensuring that the fourth side 112b has good isothermal properties.
[0056] Specifically, refer to Figure 4 and Figure 5 As shown, the thermal insulation layer 500 includes a first thermal insulation section 510 and a second thermal insulation section 520 connected to each other, wherein the first thermal insulation section 510 is located on the side of the first side 111a away from the second side 111b, which can prevent heat from being released and flowing out from the first side 111a. The second thermal insulation section 520 is located on the side of the first bottom surface 120a away from the second bottom surface 120b, which can prevent heat from being released and flowing out from the bottom plate 120. It should be explained that the thermal insulation layer 500 is shown in two sections to reflect the different positions covered by the thermal insulation layer 500.
[0057] Continue to refer Figures 1 to 6 As shown, the tubular heat source 10 further includes an exhaust pipe 600 , which is located on the cover plate 130 and penetrates the cover plate 130 .
[0058] Specifically, refer to Figures 1 to 6 As shown, the tubular heat source 10 includes an exhaust pipe 600, the working medium 300 is placed in the inner cavity through the exhaust pipe 600, and the gas of the non-liquid working medium and the gaseous working medium in the inner cavity can be discharged through the exhaust pipe 600. When ensuring that only the working medium exists in the inner cavity, the exhaust pipe 600 is closed to ensure the closed state of the inner cavity.
[0059] Exemplarily, the following methods can be used to seal the exhaust pipe 600: The first method is a vacuum pump method: the inner cavity is evacuated with a vacuum pump. Optionally, the tubular heat source 10 further includes a triangular valve (not specifically shown in the figure), which is located at the exhaust pipe 600. The vacuum pump can be used to evacuate the gas pressure in the inner cavity to 10 -3After pa, add an appropriate amount of liquid working fluid through the three-way angle valve. After the filling is completed, use sealing pliers and brazing to seal the exhaust pipe 600. At this time, there are only liquid and gaseous working fluids in the inner cavity. The second method is the heating self-draining method: use a syringe to inject an appropriate amount of liquid working fluid from the exhaust pipe 600 into the inner cavity. The inner cavity is a state where liquid, gas and air coexist. The column structure 100 is heated from the bottom plate 120, and the liquid working fluid is gasified and discharged from the exhaust pipe 600 together with the air in the cavity. This process does not require a vacuum pump and is simple and easy. If deionized water is used as the liquid working fluid, the loss of liquid working fluid can be ignored.
[0060] Based on the same concept, the embodiment of the utility model also provides a uniform heat device. Figure 7 is a schematic diagram of a heat distribution device provided in an embodiment of the present utility model, and the heat distribution device includes any tubular heat source provided in the above embodiments. Figure 7 The uniform heating device 1 includes a tubular heat source 10. Therefore, the uniform heating device 1 also has the beneficial effects of the tubular heat source 10 in the above embodiment. The similarities can be understood by referring to the above explanation of the tubular heat source 10, which will not be repeated below.
[0061] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims
1. A tubular heat source, characterized in that: It includes a column structure, a heating unit and a working medium; The column structure includes a copper tube, a bottom plate and a cover plate; the copper tube includes a first copper tube and a second copper tube, the first copper tube and the second copper tube are both located on one side of the bottom plate, and the first copper tube surrounds the second copper tube, and the diameter of the first copper tube is greater than the diameter of the second copper tube; the cover plate is located on a side of the copper tube away from the bottom plate, the first end of the cover plate is connected to the first copper tube, and the second end of the cover plate is connected to the second copper tube; The first copper tube includes a first side surface and a second side surface, and the first side surface is located on a side of the second side surface away from the second copper tube; the second copper tube includes a third side surface and a fourth side surface, and the third side surface is located on a side of the fourth side surface close to the first copper tube; the bottom plate includes a first bottom surface and a second bottom surface, and the first bottom surface is located on a side of the second bottom surface away from the cover plate; the cover plate includes a first cover plate surface and a second cover plate surface, and the first cover plate surface is located on a side of the second cover plate surface close to the bottom plate; The inner cavity of the column structure includes the second side surface, the third side surface, a portion of the second bottom surface and the first cover surface; The heating unit is located on a side of the first side away from the second side, and the heating unit is close to the bottom plate; the working medium is located in the inner cavity of the column structure, and the working medium includes a liquid working medium and / or a gaseous working medium and / or a gas-liquid mixed working medium; The tubular heat source transfers heat to the outside through the fourth side.
2. The tubular heat source according to claim 1, characterized in that: An extension length of the first copper tube along a first direction is greater than an extension length of the second copper tube along the first direction; An angle exists between the extension direction of the cover plate and the second direction; The first direction is the extending direction of the copper tube, and the second direction is perpendicular to the first direction.
3. The tubular heat source according to claim 2, characterized in that: The included angle between the extension direction of the cover plate and the second direction is 45°.
4. The tubular heat source according to claim 1, characterized in that: The diameter of the second copper tube is D1, and the extension length of the second copper tube is L1, wherein L1 / D1≥20.
5. The tubular heat source according to claim 1, characterized in that: The tubular heat source further includes at least one temperature acquisition unit, wherein the temperature acquisition unit is located on a side of the first side away from the second side, and the temperature acquisition unit is away from the bottom plate.
6. The tubular heat source according to claim 1, characterized in that: The tubular heat source further comprises a heat preservation layer, wherein the heat preservation layer comprises a first heat preservation subsection and a second heat preservation subsection connected to each other; The first heat-insulating sub-portion is located on a side of the first side surface away from the second side surface, the second heat-insulating sub-portion is located on a side of the first bottom surface away from the second bottom surface, and the first heat-insulating sub-portion covers the heating unit.
7. The tubular heat source according to claim 1, characterized in that: The tubular heat source further includes an exhaust pipe, which is located on the cover plate and penetrates through the cover plate.
8. The tubular heat source according to claim 7, characterized in that: The tubular heat source further includes a triangular valve, which is located at the exhaust pipe.
9. The tubular heat source according to claim 1, characterized in that: The heating unit includes an electric heater.
10. A uniform heating device, characterized in that: It comprises the tubular heat source described in any one of claims 1 to 9.