Clean fresh air heater

Abstract

The invention discloses a clean fresh air heater. The clean fresh air heater comprises a ceramic substrate and a heating assembly used for heating the ceramic substrate. The ceramic substrate comprises a substrate body, a plurality of heat conduction ventilation pipes arranged perpendicular to the plane of the substrate body and a ceramic cover plate arranged on the sides, away from the substrate body, of the heat conduction ventilation pipes. The heating assembly comprises a heating resistor arranged in the ceramic substrate, and the heating resistor is contained in a space area formed by the substrate body, the heat conduction ventilation pipe and the ceramic cover plate. According to the clean fresh air heater, the heating efficiency is guaranteed, the use safety of the clean fresh air heater is improved, the electric leakage risk is avoided, and the safety performance is improved. The clean fresh air heater is suitable for scenes with cleaning requirements such as semiconductors, photovoltaics, solar energy, medical equipment, optics and detection instruments, and the application range is wide.

Description

Technical Field

[0001] The invention relates to the technical field of heating ventilators, and in particular to a clean fresh air heater. Background Art

[0002] The heating and ventilation device in the prior art includes a metal air duct and a heater fixed in the metal air duct. The heating resistor in the heater is pre-placed in the metal air duct, and the metal air duct is filled with quartz sand as a heat-conducting and insulating medium. The defects of the heating and ventilation device in the prior art include: the metal layer on the surface of the heater oxidizes and produces metal dust when heated; the heater has a risk of breakdown and leakage; the surface temperature of the heater is high, and there is a risk of high-temperature burns. Therefore, it is very necessary to provide a clean, safe, and better-performing clean fresh air heater. Summary of the invention

[0003] The object of the present invention is to solve the above-mentioned problem and provide a clean fresh air heater, which generates no dust, is easy to clean, has high safety and good performance.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows:

[0005] A clean fresh air heater comprises a ceramic substrate and a heating component for heating the ceramic substrate; the ceramic substrate comprises a substrate body, a plurality of heat-conducting ventilation ducts arranged perpendicular to the plane of the substrate body, and a ceramic cover plate arranged on the side of the heat-conducting ventilation ducts away from the substrate body; the heating component comprises a heating resistor arranged inside the ceramic substrate, and the heating resistor is accommodated in a space area formed by the substrate body, the heat-conducting ventilation ducts and the ceramic cover plate.

[0006] Optionally, a first hole connected to the heat-conducting ventilation pipe is provided on the substrate body, and a second hole connected to the heat-conducting ventilation pipe is provided on the ceramic cover plate, and the first hole, the heat-conducting ventilation pipe and the second hole are connected to form a ventilation duct; adjacent heat-conducting ventilation pipes are spaced apart to form grooves, and the heating resistor is embedded in the grooves.

[0007] Optionally, the heating resistor includes a plurality of heating resistor units arranged along the rows or columns of the heat-conducting ventilation ducts, and the heating resistor units are arranged along the outer circumference of the entire row or column of the heat-conducting ventilation ducts; the connecting end of the heating resistor unit protrudes from the ceramic substrate; the heating assembly also includes a heating electrode externally arranged on the ceramic substrate and connected to the connecting end.

[0008] Optionally, the connection end includes a first connection end and a second connection end, the first connection end and the second connection end are arranged on the same side of the ceramic substrate, and the heating electrode includes a first heating electrode and a second heating electrode respectively connected to the first connection end and the second connection end.

[0009] Optionally, an arc-shaped curved portion that cooperates with the outer wall of the heat-conducting ventilation duct is provided on a region where the heating resistor unit corresponds to the outer wall of the heat-conducting ventilation duct.

[0010] Optionally, an insulating shell is provided on the ceramic substrate, and the heating electrode is accommodated in the insulating shell.

[0011] Optionally, an insulating heat-insulating pad is provided between the insulating shell and the ceramic substrate, and the connecting end passes through the insulating heat-insulating pad and is connected to the heating electrode.

[0012] Optionally, the clean fresh air heater further includes a plurality of over-temperature protection switches arranged on the ceramic substrate, and the over-temperature protection switches are used to detect the heating temperature of the ceramic substrate.

[0013] Optionally, the ceramic cover plate is detachably connected to the substrate body.

[0014] Optionally, the ceramic substrate includes one of a zirconia ceramic substrate, an alumina ceramic substrate, a zirconia-based composite ceramic substrate or an alumina-based composite ceramic substrate.

[0015] The beneficial effects produced by the present invention include at least:

[0016] The clean fresh air heater described in the present invention includes a ceramic substrate. The ceramic substrate is clean, does not generate dust during use, is easy to clean, and is not easy to deform compared to the metal heating tube in the prior art, thereby ensuring the overall structural stability of the clean fresh air heater. The heating resistor is built into the ceramic substrate. When the heating resistor heats the ceramic substrate as a whole, the ceramic substrate has insulation performance, thereby ensuring the heating efficiency and improving the safety of the clean fresh air heater. The heating resistor is encapsulated in the ceramic substrate. The ceramic substrate itself has thermal conductivity and insulation performance, thereby avoiding the risk of leakage and improving safety performance. The clean fresh air heater described in the present invention is suitable for use in semiconductors, photovoltaics, solar energy, medical equipment, optics, testing instruments and other scenarios with cleanliness requirements, and has a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the clean fresh air heater of the present invention.

[0018] Figure 2 It is a schematic diagram of the explosion of the clean fresh air heater of the present invention.

[0019] Figure 3 Schematic diagram of the distribution of heat conduction ventilation pipes.

[0020] Figure 4 A schematic diagram of the structure of the heating component.

[0021] Among them, 1-ceramic substrate, 11-substrate body, 12-heat-conducting ventilation duct, 13-ceramic cover plate, 131-second hole, 14-groove, 2-heating component, 21-heating resistor, 211-heating resistor unit, 2111-arc-shaped bending portion, 212-connecting end, 2121-first connecting end, 2122-second connecting end, 213-heating electrode, 2131-first heating electrode, 2132-second heating electrode, 3-insulating shell, 4-insulating thermal insulation pad. DETAILED DESCRIPTION

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in the present invention. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0024] In the description of the present invention, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] Example:

[0026] A clean fresh air heater, see Figure 1 and Figure 2 As shown, it includes a ceramic substrate 1 and a heating component 2 for heating the ceramic substrate 1; the ceramic substrate 1 includes a substrate body 11, a plurality of heat-conducting ventilation pipes 12 arranged perpendicular to the plane of the substrate body 11, and a ceramic cover plate 13 arranged on the side of the heat-conducting ventilation pipes 12 away from the substrate body 11; the heating component 2 includes a heating resistor 21 arranged inside the ceramic substrate 1, and the heating resistor 21 is accommodated in the space area formed by the substrate body 11, the heat-conducting ventilation pipes 12 and the ceramic cover plate 13.

[0027] When in use, the first hole, the heat-conducting ventilation pipe 12 and the second hole 131 are connected to form a ventilation duct. The heating resistor 21 generates heat to heat the ceramic substrate 1. Air is supplied from one side of the ceramic substrate 1, passes through the ventilation duct, and is heated and discharged from the other side of the ceramic substrate 1 to heat the usage scene.

[0028] The clean fresh air heater described in the present invention includes a ceramic substrate 1. The ceramic substrate 1 is clean, does not generate dust during use, is easy to clean, and is not easy to deform compared to the metal heating tube in the prior art, thereby ensuring the overall structural stability of the clean fresh air heater. The heating resistor 21 is arranged in the ceramic substrate 1. When the heating resistor 21 heats the ceramic substrate 1 as a whole, the ceramic substrate 1 has insulation performance, ensures the heating efficiency, and improves the safety of the clean fresh air heater. The heating resistor 21 is encapsulated in the ceramic substrate 1. The ceramic substrate 1 itself has thermal conductivity and insulation properties, thereby avoiding the risk of leakage and improving safety performance.

[0029] The clean fresh air heater of the present invention is suitable for use in semiconductors, photovoltaics, solar energy, medical equipment, optics, testing instruments and other cleanliness-required scenarios, and has a wide range of applications. In some embodiments, the clean fresh air heater of the present invention can be directly set between the ventilation ducts or at the air outlet of the use scenario; in other embodiments, the clean fresh air heater of the present invention can be directly installed at the outlet of the dry coil. The heating component 2 is encapsulated in the ceramic substrate 1, and the ceramic substrate 1 itself has thermal conductivity and insulation properties, which avoids the risk of leakage and improves safety performance.

[0030] Optionally, the number of the ceramic substrates 1 is at least 1; when the clean fresh air heater includes at least 2 ceramic substrates 1, the ceramic substrates 1 are arranged in parallel, and the ventilation ducts between the ceramic substrates 1 are interconnected. It is understandable that the specific number of the ceramic substrates 1 can be specifically set according to actual usage.

[0031] The substrate body 11 is provided with a first hole connected to the heat-conducting ventilation pipe 12, and the ceramic cover plate 13 is provided with a second hole 131 connected to the heat-conducting ventilation pipe 12. The first hole, the heat-conducting ventilation pipe 12 and the second hole 131 are connected to form a ventilation duct; see Figure 3 As shown, adjacent heat-conducting ventilation pipes 12 are spaced apart to form grooves 14, and the heating resistor 21 is embedded in the grooves 14. The number of heat-conducting ventilation pipes 12, the aperture size, and the gap size between the heat-conducting ventilation pipes 12 can be specifically set according to actual needs such as actual fresh air ventilation volume and pressure difference.

[0032] See also Figure 4 As shown, the heating resistor 21 includes a plurality of heating resistor units 211 arranged in rows or columns along which the heat-conducting ventilation pipes 12 are arranged. The heating resistor units 211 are arranged along the outer periphery of the entire row or column of the heat-conducting ventilation pipes 12, that is, the entire row or column of the heat-conducting ventilation pipes 12 are arranged in an area surrounded by a path around the heating resistor units 211; the connecting end 212 of the heating resistor unit 211 is arranged to protrude from the ceramic substrate 1; the heating component 2 also includes a heating electrode 213 externally arranged on the ceramic substrate 1 and connected to the connecting end 212.

[0033] Optionally, the connection end 212 includes a first connection end 2121 and a second connection end 2122, and the first connection end 2121 and the second connection end 2122 are arranged on the same side of the ceramic substrate 1, and the heating electrode 213 includes a first heating electrode 2131 and a second heating electrode 2132 connected to the first connection end 2121 and the second connection end 2122, respectively. The first connection end 2121 and the second connection end 2122 are arranged on the same side of the ceramic substrate 1, so that the first heating electrode 2131 and the second heating electrode 2132 connected to the first connection end 2121 and the second connection end 2122 are also arranged on the same side of the ceramic substrate 1, which improves the integration of the heating electrode 213 and the connection end 212, facilitates wiring, and reduces the overall volume of the heater. Optionally, the heating electrode 213 is arranged in parallel with the direction of the rows in which the heat-conducting ventilation pipes 12 are arranged or in parallel with the direction of the columns in which the heat-conducting ventilation pipes 12 are arranged. For example, in some embodiments, when the heating resistor unit 211 is arranged along the direction of the row arranged with the heat-conducting ventilation pipe 12, the heating electrode 213 is arranged along the direction of the column arranged with the heat-conducting ventilation pipe 12; in other embodiments, the heating resistor unit 211 is arranged in parallel with the direction of the column arranged with the heat-conducting ventilation pipe 12, and the heating electrode 213 is arranged in parallel with the direction of the row arranged with the heat-conducting ventilation pipe 12.

[0034] The area corresponding to the heating resistor unit 211 and the outer wall of the heat-conducting ventilation pipe 12 is provided with an arc-shaped curved portion 2111 that cooperates with the outer wall of the heat-conducting ventilation pipe 12. The arrangement of the arc-shaped curved portion 2111 increases the contact area between the heating resistor unit 211 and the heat-conducting ventilation pipe 12, and improves the heating and heat-conducting efficiency of the heating resistor 21. At the same time, the arrangement of the arc-shaped curved portion 2111 enables the heating resistor unit 211 to be arranged around the outer periphery of the heat-conducting ventilation pipe 12, and the heat-conducting ventilation pipe 12 plays a positioning role for the heating resistor 21, and improves the installation stability of the heating resistor 21.

[0035] See also Figure 1 and Figure 2 As shown, an insulating housing 3 is provided on the ceramic substrate 1, and the heating electrode 213 is accommodated in the insulating housing 3. The insulating housing 3 accommodates the heating electrode 213 therein, thereby avoiding the potential safety hazard caused by leakage of the heating electrode 213 during use. In some embodiments, the insulating housing 3 includes a housing body arranged close to the ceramic substrate 1 and an insulating cover plate arranged on a side of the housing body away from the ceramic substrate 1. Optionally, the housing body and the insulating cover plate are integrally formed, or the insulating cover plate is detachably connected to the housing body.

[0036] An insulating heat-insulating pad 4 is provided between the insulating shell 3 and the ceramic substrate 1, the connecting end 212 passes through the insulating heat-insulating pad 4 and is connected to the heating electrode 213, and the insulating heat-insulating pad 4 is provided with a third hole for the connecting end 212 to pass through, and the heating electrode 213 is accommodated in the space formed by the insulating shell 3 and the insulating heat-insulating pad 4. The provision of the insulating heat-insulating pad 4 prevents the heat of the ceramic substrate 1 from being dissipated into the insulating shell 3, avoids the influence of the temperature rise on the heating electrode 213, and further improves the safety performance of the clean fresh air heater of the present invention.

[0037] The clean fresh air heater also includes a plurality of over-temperature protection switches arranged on the ceramic substrate 1, and the over-temperature protection switch is used to detect the heating temperature of the ceramic substrate 1. When in use, when the over-temperature protection switch detects that the heating temperature of the ceramic substrate 1 is higher than the preset heating temperature value, the over-temperature protection switch will trip, cut off the power supply of the heater, stop heating, and connect the power supply to continue heating after the heating temperature of the ceramic substrate 1 is lower than or equal to the preset heating temperature. The setting of the over-temperature protection switch monitors and adjusts the heating temperature of the ceramic substrate 1 in real time, so that the heating temperature position of the ceramic substrate 1 is within the preset heating temperature, ensuring that the temperature of the ceramic substrate 1 does not exceed the set temperature, thereby ensuring that the temperature of the clean fresh air heater is maintained within a stable range, avoiding safety hazards caused by overheating. Optionally, the value of the preset heating temperature of the clean fresh air heater can be set according to specific usage requirements. For example, when the clean fresh air heater is used in an environment where the human body can touch it, when the temperature requirement in the clean room is 22±2°C, the preset heating temperature is 30±2°C; this can prevent the ceramic substrate 1 from heating up too high and scalding the user, thereby improving the safety performance of the clean fresh air heater and improving the user's experience.

[0038] Optionally, the ceramic cover plate 13 is detachably connected to the substrate body 11 to facilitate the disassembly and cleaning of the clean fresh air heater. Optionally, the ceramic cover plate 13 is detachably connected to the substrate body 11 by a fastener, and the fastener includes a screw or a locking structure; in other embodiments, the ceramic cover plate 13 is connected to the substrate body 11 by a snap-fit ​​structure, and the ceramic cover plate 13 is detachably connected to the substrate body 11 by the snap-fit ​​structure.

[0039] The ceramic substrate 1 includes one of a zirconia ceramic substrate 1 , an alumina ceramic substrate 1 , a zirconia-based composite ceramic substrate 1 or an alumina-based composite ceramic substrate 1 .

[0040] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above embodiments only express the preferred implementation modes of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A clean fresh air heater, characterized in that: It includes a ceramic substrate and a heating component for heating the ceramic substrate; the ceramic substrate includes a substrate body, a plurality of heat-conducting ventilation ducts arranged perpendicular to the plane of the substrate body, and a ceramic cover plate arranged on the side of the heat-conducting ventilation ducts away from the substrate body; the heating component includes a heating resistor arranged inside the ceramic substrate, and the heating resistor is accommodated in a space area formed by the substrate body, the heat-conducting ventilation ducts and the ceramic cover plate.

2. The clean fresh air heater according to claim 1, characterized in that: The substrate body is provided with a first hole connected to the heat-conducting ventilation pipe, and the ceramic cover plate is provided with a second hole connected to the heat-conducting ventilation pipe. The first hole, the heat-conducting ventilation pipe and the second hole are connected to form a ventilation duct; adjacent heat-conducting ventilation pipes are spaced apart to form grooves, and the heating resistor is embedded in the grooves.

3. The clean fresh air heater according to claim 1, characterized in that: The heating resistor includes a plurality of heating resistor units arranged in rows or columns along which the heat-conducting ventilation pipes are arranged, and the heating resistor units are arranged along the outer circumference of the entire row or column of the heat-conducting ventilation pipes; the connecting end of the heating resistor unit protrudes from the ceramic substrate; the heating component also includes a heating electrode externally arranged on the ceramic substrate and connected to the connecting end.

4. The clean fresh air heater according to claim 3 is characterized in that: The connection end includes a first connection end and a second connection end, the first connection end and the second connection end are arranged on the same side of the ceramic substrate, and the heating electrode includes a first heating electrode and a second heating electrode respectively connected to the first connection end and the second connection end.

5. The clean fresh air heater according to claim 3, characterized in that: An arc-shaped curved portion that cooperates with the outer wall of the heat-conducting ventilation pipe is provided on the area corresponding to the heating resistor unit and the outer wall of the heat-conducting ventilation pipe.

6. The clean fresh air heater according to claim 3, characterized in that: An insulating shell is arranged on the ceramic substrate, and the heating electrode is accommodated in the insulating shell.

7. The clean fresh air heater according to claim 6, characterized in that: An insulating heat-insulating pad is arranged between the insulating shell and the ceramic substrate, and the connecting end passes through the insulating heat-insulating pad and is connected to the heating electrode.

8. The clean fresh air heater according to claim 1, characterized in that: The clean fresh air heater also includes a plurality of over-temperature protection switches arranged on the ceramic substrate, and the over-temperature protection switches are used to detect the heating temperature of the ceramic substrate.

9. The clean fresh air heater according to claim 1, characterized in that: The ceramic cover plate is detachably connected to the substrate body.

10. The clean fresh air heater according to claim 1, characterized in that: The ceramic substrate includes one of a zirconia ceramic substrate, an alumina ceramic substrate, a zirconia-based composite ceramic substrate or an alumina-based composite ceramic substrate.

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