Heating device

Abstract

[Solution] The present disclosure provides a heating device including a housing with an electric heating tube installed therein, an air inlet and an air outlet installed at opposite ends of the housing, at least one shielding plate installed inside the housing along a direction from the air inlet to the air outlet, the area of ​​the shielding plate being smaller than the cross-sectional area of ​​the housing, and the first of the shielding plates installed facing the air inlet. According to this disclosure, the flow of fluid inside the heating device can be effectively controlled, the heat exchange efficiency of the heating device is relatively high, temperature detection is more accurate, energy consumption is significantly reduced, false alarms are reduced, and the service life of the heating device is extended.

Description

[Technical Field]

[0001] The present application relates to the technical field of heating devices, and more particularly to a heating device for an adsorption dryer. [Background technology]

[0002] The heating device is an important component of the adsorption dryer. The heating device regenerates the adsorbent in the adsorption dryer, and the regenerated adsorbent can re-adsorb the saturated compressed gas transported by the front-end air compressor. This cycle of adsorbent regeneration reduces usage costs and produces compressed gas with a low dew point.

[0003] Conventional heating devices have many problems, such as uneven temperature when the airflow passes through the heating chamber, which can easily cause dead zones to form, preventing the temperature sensor from detecting the highest temperature in the heating chamber and causing the heating device to burn out; or the temperature sensor may continuously detect the temperature in the airflow accumulation area, triggering a temperature alarm and shutting down the equipment, but the temperature at the outlet of the heating device may not actually reach the temperature set by the adsorbent regeneration program in the adsorption dryer. Summary of the Invention [Problem to be solved by the invention]

[0004] In light of this, the present application aims to provide a heating device that provides a solution to one or more of the above-mentioned problems. [Means for solving the problem]

[0005] A heating device according to an embodiment of the present application includes a housing, an electric heating tube installed inside the housing, an air inlet and an air outlet installed at opposite ends of the housing, and at least one shielding plate installed inside the housing along a direction from the air inlet to the air outlet, the area of ​​the shielding plate being smaller than the cross-sectional area of ​​the housing, and the first of the shielding plates installed facing the air inlet.

[0006] In some embodiments, the shielding plate has an arcuate shape, and the area of ​​the arcuate shape is greater than the area of ​​half a circle with the same radius. Further, the shielding plate further has an air hole.

[0007] In some embodiments, the shielding plates are arranged sequentially along the longitudinal direction within the housing, and the arcuate directions of adjacent shielding plates are opposite to each other.

[0008] In some embodiments, at least one tie rod is installed inside the housing, and the shield plate is penetrated by the tie rod.

[0009] In some embodiments, when there are multiple tie rods, the multiple tie rods are installed in parallel, the shielding plate has corresponding tie rod holes, and the shielding plate is penetrated by the multiple tie rods through the tie rod holes.

[0010] In some embodiments, the number of tie rod holes is three, and the three tie rod holes are arranged in a triangular configuration.

[0011] In some embodiments, a fixed plate is disposed within the housing, and the tie rod is mounted within the housing by the fixed plate.

[0012] In some embodiments, a thermocouple temperature rod is horizontally installed inside the housing, and one end of the thermocouple temperature rod is electrically connected to a mechanical overheat protection switch.

[0013] In some embodiments, the thermocouple temperature rod is located within a sealed temperature control tube, the temperature control tube passes through the center of the shield plate, and the other end of the thermocouple temperature rod extends to the center of the housing between two adjacent shield plates.

[0014] In some embodiments, a temperature sensor is installed vertically at the tip of the air outlet, and the temperature sensor is connected to a controller that can warn of overheating and shut down the air conditioner.

[0015] (Effect of the invention) By rationally configuring the structure and layout of the shielding plate and rationally arranging the position of the temperature measuring device, the flow of fluid inside the heating device can be effectively controlled, the heat exchange efficiency of the heating device is relatively high, the temperature detection is more accurate, energy consumption is significantly reduced, false alarms are reduced, the service life of the heating device is extended, the pressure drop of the heating device is relatively low, the airflow is smooth, and the working efficiency of the heating device is greatly improved.

[0016] Additional aspects and advantages of the present application will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the present application. [Brief explanation of the drawings]

[0017] [Figure 1] 1 is a schematic diagram of a horizontal cross-sectional structure of a heating device provided by the present application; [Figure 2] 1 is a schematic diagram of a longitudinal cross-sectional structure of a heating device provided by the present application; [Figure 3] 1 is a structural schematic diagram of a shielding plate in a heating device provided by the present application; [Figure 4] 1 is a structural schematic diagram of a fixed plate in a heating device provided by the present application; DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to these.

[0019] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description is merely exemplary of embodiments and should not be considered limiting. It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art can certainly realize many other equivalent forms of the present application, which, since they have the characteristics set forth in the claims, are included in the scope of protection limited thereby.

[0020] The drawings, which are incorporated into and constitute a part of the specification, illustrate embodiments of the present application and, together with the general description of the present application given above and the detailed description of the embodiments given below, are intended to explain the principles of the present application.

[0021] Furthermore, the terms "first," "second," etc. in the specification and claims of this application and in the above drawings are intended to distinguish between similar objects and are not necessarily intended to describe a particular order or priority.

[0022] In the description of this application, unless otherwise clearly specified and limited, terms such as "attached," "coupled," "connected," "welded," and "fixed" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, or integration, a mechanical connection, an electrical connection, mutual communication, direct connection, indirect connection via an intermediate medium, internal communication between two elements, or an interactive relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in the present application according to specific circumstances.

[0023] In the description of this application, the orientations or positional relationships indicated by terms such as "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of simplifying the description and explanation of this application. They do not indicate or imply that the designated device or element must necessarily have a specific orientation or be configured or operated in a specific orientation, and should not be understood as a limitation on this application.

[0024] Furthermore, in this description, the terms "comprises" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units need not be limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to the process, method, product or device.

[0025] The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals throughout indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and are intended to help interpret the present application, but should not be understood as limitations on the present application.

[0026] 1 and 2, a heating device according to an embodiment of the present invention includes a housing 12. An air inlet 121 and an air outlet 122 are respectively installed at opposite ends of the housing, and preferably, the air inlet 121 and the air outlet 122 are located on the same side of the housing. An electric heating pipe 6 is installed within the housing 12, and the electric heating pipe 6 is installed to extend along the longitudinal direction of the housing 12.

[0027] Furthermore, at least one shielding plate 5 is installed inside the housing 12 along the direction from the air inlet 121 to the air outlet 122, and specifically, 304 stainless steel is used as the material for the shielding plate 5.

[0028] Furthermore, the area of ​​each of the shielding plates 5 is smaller than the cross-sectional area of ​​the housing 12, which is advantageous for forming an air flow channel within the housing 12, and the air flow entering from the air intake port 121 passes between each of the shielding plates 5 and the inner wall of the housing 12, improving the heat exchange effect.

[0029] In some alternative embodiments, when there are multiple shielding plates 5 in the housing 12, the first of the multiple shielding plates 5 is installed facing the air inlet 121. When the high-speed, high-pressure airflow entering through the air inlet 121 impacts the wall of the housing 12 and the shielding plates 5, the airflow changes direction, the flow velocity is reduced to a certain extent, and after rebounding, the airflow tends to move away from the wall, which is more effectively controlled and guided by the subsequent shielding plates 5, thereby significantly improving the heat exchange efficiency between the fluid and the heating device.

[0030] When the cross section of the housing 12 is circular, different shapes of the shielding plates have different flow areas, and the optimum flow rate can be achieved by the different flow areas. In some alternative embodiments, the shielding plates 5 are arcuate, and the area of ​​the arcuate shape is greater than the area of ​​a half circle of the same radius. More preferably, the area of ​​the arcuate shape is three-quarters the area of ​​a circle of the same radius.

[0031] In some alternative embodiments, the arcuate arcs of the shielding plates 5 are offset from each other along the horizontal extension direction of the electric heating tube 6, and are regularly and alternately distributed inside the housing 12. Preferably, the arcuate arcs of adjacent shielding plates 5 are opposite to each other, that is, when the arc of one shielding plate 5 faces upward, the arcs of one or two adjacent shielding plates 5 face downward, and the pitches remain the same. In this way, the multiple shielding plates 5 are sequentially and symmetrically arranged up and down with respect to the central axis of the housing 12, which can effectively guide the fluid flowing inside the chamber of the heating device.

[0032] As can be seen from the simulation of the temperature field, if the pressure loss is too large, the airflow distribution is uneven, or the temperature is locally too high, dead zones are likely to appear, while if the pressure loss is too low or the airflow speed is too fast, the heat exchange effect will be poor and the operating temperature and heat exchange efficiency of the heating device will not be achieved. It is preferable that the pressure loss is 15 to 30 mbar.

[0033] In this embodiment, the number and position of the shielding plates 5 can effectively guide the flow of fluid inside the heating device, and efficiently exchange heat with the electric heating pipes 6 in the heating device. By changing the number and length of the electric heating pipes 6 and the number of the shielding plates 5, the adaptability of the heating device to the needs of operating conditions can be improved, and the working efficiency of the heating device can be further improved. Optionally, the number of the electric heating pipes 6 is 3 to 40, the length is 1 to 2 meters, and the number of the shielding plates 5 is 5 to 10.

[0034] According to the needs of the operating conditions, in a specific embodiment of the present application, the power of the heating device reaches 90 kW, 30 electric heating tubes 6 are adopted, each electric heating tube 6 has a length of 1.5 meters, and the number of the shielding plates 5 is set to 7.

[0035] According to the operating needs, in one specific embodiment of the present application, the power of the heating device reaches 115 kW, 36 electric heating tubes 6 are adopted, each electric heating tube 6 has a length of 1.7 meters, and the number of shielding plates 5 is set to 8.

[0036] In some alternative embodiments, at least one tie rod 8 is provided inside the housing 12 to fix the shielding plate 5 inside the housing 12, and the tie rod 8 is connected to the housing 1 2, and the shielding plate 5 is passed through by the tie rod 8.

[0037] Furthermore, the housing 12 further includes a fixing plate 9 therein, and the fixing plate is fixed to the housing 12. 1 2, and the fixing plate 9 is attached to the housing 1 2 are mutually perpendicular to the longitudinal direction of the housing 12, the fixed plate 9 adopts a circular structure, the dimensions of the fixed plate 9 remain consistent with the cross section of the housing 12, and the tie rod 8 is connected to it. Specifically, the fixed plate 9 is connected to the tie rod 8 by spot welding. In this way, the position of the tie rod 8 is fixed by the fixed plate 9, and the tie rod 8 will not rotate within the housing 12.

[0038] In some preferred embodiments, the number of the fixed plates 9 may be one or more, and the fixed plates 9 are installed at positions where the pressure drop inside the housing is minimum.

[0039] Referring to a specific embodiment shown in FIG. 3, the shielding plate 5 is provided with a temperature measuring hole 53 and a tie rod hole 52, the shielding plate 5 is penetrated by the tie rod 8 through the tie rod hole 52, and the temperature measuring hole 53 is for installing a temperature measuring device.

[0040] In this embodiment, the number of the tie rods 8 may be multiple, and the multiple tie rods 8 may be installed in parallel within the housing 12. Specifically, in this embodiment, three tie rods 8 may be used, and therefore, three tie rod holes 52 may be installed at any positions on the shielding plate 5.

[0041] In one embodiment, the three tie rod holes 52 are arranged in a stable triangular shape, and the three tie rods 8 pass through the tie rod holes 52 installed in the shielding plate 5, thereby fixing the position of the shielding plate 5 by the tie rods 8.

[0042] In some alternative embodiments, the shielding plate 5 is further provided with a plurality of air holes 51, which increase the airflow permeability of the shielding plate 5 and eliminate local turbulence formed behind the shielding plate 5, thereby solving the problem of heat accumulation in dead zones and the problem of overheating failure of the heating device. Through calculation and practice, it is found that there are no dead zones where temperature accumulates and no high-temperature areas in the heating chamber that reach 600°C or higher, so the heating device is not burned out and the service life of the heating device is greatly improved.

[0043] Specifically, in one embodiment, one temperature measurement hole 53 is provided at the center of the circular structure of the shielding plate 5, and three tie rod holes 52 are provided at three positions on the left, middle and right of the shielding plate 5, respectively, and the plurality of air holes 51 are uniformly distributed on the shielding plate 5, and the transmittance of the air holes 51 on the shielding plate 5 is 80%, where the transmittance is the ratio of the area of ​​the air holes 51 to the area of ​​the shielding plate 5. Here, when the airflow flows from the air inlet 121 to the air outlet 122 in the housing 12, the speed rate passing through each area formed between the two shielding plates 5 is equal and does not exceed the maximum design flow velocity.

[0044] In some alternative embodiments, a hollow temperature control tube 7 is installed in the center of the housing 12, and a thermocouple temperature rod 71 is built into it, and one end of the thermocouple temperature rod 71 is electrically connected to, for example, a mechanical overheat protection switch, and the temperature control tube 7 and the thermocouple temperature rod 71 therein can pass through the temperature measurement hole 53 in the center of the shielding plate 5.

[0045] Preferably, the other end of the thermocouple temperature rod 71 is extended and installed between two adjacent shielding plates 5 located in the middle of the housing 12, thereby simultaneously avoiding the distance between the thermocouple temperature rod 71 and the shielding plates 5 and the electric heating tube 6 being too close, reducing the influence of heat radiation from the shielding plates 5 and the electric heating tube 6 on the thermocouple temperature rod 71, and combining conventional temperature control logic to better monitor the temperature inside the housing 12 of the heating device, thereby accurately controlling the running of the heating device.

[0046] The position of the thermocouple temperature rod 71 is determined based on the temperature field distribution obtained by combining the control logic and calculations of the heating device, ensuring that the heating device can run normally, and that the temperature of the heating device itself and the temperature of the heated fluid are both within a reasonable range. When the limit temperature, for example, 400°C, is reached, the heating device will be shut down by the mechanical overheat protection switch electrically connected to the thermocouple temperature rod 71.

[0047] From the temperature field distribution results obtained by analysis and calculation, it can be seen that the temperature distribution in the cross section at the bottom of the outlet 122 of the heating device is not uniform, and the temperature difference can reach more than 100 degrees Celsius. If the temperature sensor is placed in a low-temperature area, the measured fluid temperature will be too low, and considering the continuous heating of the heating device, there will be a risk of incineration. On the other hand, if the temperature sensor is placed in a high-temperature area, the measured fluid temperature will be too high, and the air at the outlet 122 will not be able to meet the heating needs.

[0048] In some alternative embodiments, the temperature sensor is installed vertically at the tip of the outlet 122, effectively reducing the influence of high and low temperature areas on the temperature measurement. The temperature sensor is connected to a controller in an electrical control panel. In one specific embodiment, when the pressure loss is set to 30 mbar, the controller's program is designed to issue an alarm if the outlet 122's protection temperature reaches 240°C and shut down if it reaches 250°C. By setting these parameters, the heating device can achieve optimal heat exchange efficiency and an optimal operating safe temperature range. The temperature sensor is preferably a resistive temperature sensor, and its model number is PT1000.

[0049] In the present specification, by rationally configuring the structure and layout of the shielding plate and rationally arranging the position of the temperature measuring device, the flow of fluid inside the heating device can be effectively controlled, the heat exchange efficiency of the heating device is relatively high, the temperature detection is more accurate, the energy consumption is significantly reduced, the false alarms are reduced, and the service life of the heating device is extended. The pressure drop of the heating device is relatively low, the airflow is smooth, and the working efficiency of the heating device is greatly improved.

[0050] Furthermore, when references are made in this specification to "one embodiment," "another embodiment," "an embodiment," etc., it is intended that the specific feature, structure, or characteristic described in connection with this embodiment is included in at least one of the embodiments generally described herein. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when describing a specific feature, structure, or characteristic in connection with any embodiment, it is intended to assert that achieving such feature, structure, or characteristic in connection with other embodiments is also within the scope of the present invention.

[0051] In the above embodiments, emphasis is placed on the description of each embodiment, and for parts not described in detail in one embodiment, reference can be made to the relevant descriptions of other embodiments.

[0052] The above description is merely a preferred embodiment of the present invention, and is not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. [Explanation of symbols]

[0053] 1 Chamber cover 2 Wiring chamber protective mask 3 Heat dissipation area 4 Tube sheet flange 5 Shielding plate 51 Air vent 52 tie rod hole 53 Temperature measurement hole 6 Electric heating tube 7 Temperature Control Tube 71 Thermocouple Temperature Rod 8 tie rods 9 Fixed plate 10 Power cable inlet 11 Temperature control cable inlet 12 Housing 121 Air supply port 122 Air outlet

Claims

1. 1. A heating device including a housing having an electric heating tube disposed therein, An air inlet and an air outlet are respectively installed at opposite ends of the housing, and at least one shielding plate is installed inside the housing along a direction from the air inlet to the air outlet, the area of ​​the shielding plate being smaller than the cross-sectional area of ​​the housing, and the first of the shielding plates is installed facing the air inlet. A heating device characterized by:

2. The shielding plate is arc-shaped, and the area of ​​the arc is greater than the area of ​​half a circle with the same radius, and the shielding plate is further provided with an air hole.

2. The heating device according to claim 1.

3. The plurality of shielding plates are sequentially arranged in the housing along the longitudinal direction, and the directions of the arcuate arcs of adjacent shielding plates are opposite to each other.

3. The heating device according to claim 2.

4. At least one tie rod is installed inside the housing, and the shielding plate is penetrated by the tie rod.

3. The heating device according to claim 1 or 2.

5. When the number of tie rods is multiple, the tie rods are installed in parallel, and the shielding plate has corresponding tie rod holes, through which the tie rods pass.

5. The heating device according to claim 4.

6. The number of the tie rod holes is three, and the three tie rod holes are arranged in a triangular shape.

5. The heating device according to claim 4.

7. A fixing plate is installed inside the housing, and the tie rod is installed inside the housing by the fixing plate.

5. The heating device according to claim 4.

8. A thermocouple temperature rod is horizontally installed inside the housing, and one end of the thermocouple temperature rod is electrically connected to a mechanical overheat protection switch; 3. The heating device according to claim 1 or 2.

9. The thermocouple temperature rod is located within a sealed temperature control tube, the temperature control tube passes through the center of the shielding plate, and the other end of the thermocouple temperature rod extends to a position between two adjacent shielding plates in the middle of the housing.

9. The heating device according to claim 8.

10. A temperature sensor is installed vertically at the tip of the air outlet, and the temperature sensor is connected to a controller that can issue an overheat warning and shut down the air conditioner.

3. The heating device according to claim 1 or 2.

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