Hot water and hot air PTC heater

Abstract

The utility model discloses a hot water and hot air PTC (Positive Temperature Coefficient) heater, which belongs to the field of heating electric appliances, solves the problem that a gap possibly exists between a PTC component and a hot water bracket during welding, and adopts the technical scheme that the hot water and hot air PTC heater mainly comprises a PTC shell and a hot water bracket, the PTC shell and the hot water bracket are of an integrally formed structure, and a water pipe is arranged in the hot water bracket. A PTC heating body is arranged in the PTC shell, and the outer surface of the PTC shell is connected with a hot air piece. The water heater is mainly used for eliminating the gap between the PTC assembly and the hot water support, and the water heating efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of heating appliances, in particular to a hot water and hot air PTC heater. Background Art

[0002] PTC heaters are generally composed of PTC ceramic heating elements and aluminum tubes. This type of PTC heater has the advantages of low thermal resistance and high heat exchange efficiency. It is an automatic constant temperature, energy-saving electric heater. The outstanding feature lies in safety performance. For example, when the fan fails and stops, the power of the PTC heater will automatically drop sharply due to insufficient heat dissipation. At this time, the surface temperature of the PTC heater is maintained at around the Curie temperature (generally around 250°C), so as not to produce the "reddening" phenomenon on the surface of electric heating tube heaters, thereby avoiding safety hazards such as burns and fires. Therefore, it is more and more widely used and can be used in air conditioners, hot air curtains, dehumidifiers, dryers, clothes dryers, heaters, bathroom heaters, cars and other equipment that need to provide warm air.

[0003] For example, in the prior art CN219856729U, a heater core for a new energy vehicle is disclosed, comprising an inlet confluence chamber 3, an outlet confluence chamber 7 and a parallel flow tube 4, a water inlet 2 arranged in the inlet confluence chamber 3, a water outlet 1 arranged in the outlet confluence chamber 7, the water inlet 2 is communicated with the inside of the inlet confluence chamber 3, the water outlet 1 is communicated with the inside of the outlet confluence chamber 7, the parallel flow tube 4 is arranged between the inlet confluence chamber 3 and the outlet confluence chamber 7, and the two ends of the parallel flow tube 4 extend into the inlet confluence chamber 3 and the outlet confluence chamber 7 respectively. The water inlet confluence chamber 3 and the water outlet confluence chamber 7 are connected internally, the parallel flow tube 4 is a hollow flat structure in the middle, a heat dissipation strip 6 is arranged on the surface of one side of the parallel flow tube 4, and a PTC heating tube 5 is arranged on the surface of the other side of the parallel flow tube 4. The heat dissipation strip 6 and the PTC heating tube 5 are closely attached to the parallel flow tube 4, so that the heat dissipation strip 6 can dissipate the heat in the parallel flow tube 4 into the air, and the PTC heating tube 5 can heat the liquid inside the parallel flow tube 4. The parallel flow tube 4, the PTC heating strip 5 and the heat dissipation strip 6 constitute a heat transfer component. In order to fix the PTC heating strip 5 to the other side of the parallel flow tube 4, welding is generally used. Not only is the production and processing time cycle long, the processing difficulty is high, and the cost is increased, but there may be a gap between the PTC heating strip 5 and the parallel flow tube 4 after welding. The heat generated by the PTC heating strip 5 cannot be efficiently transferred to the parallel flow tube 4, resulting in a decrease in the efficiency of heating water, affecting the user experience. Utility Model Content

[0004] The purpose to be achieved by the utility model is to provide a hot water hot air PTC heater, solve the problem of possible gaps in the welding between the PTC component and the hot water bracket, eliminate the gaps between the PTC component and the hot water bracket, and improve the efficiency of heating water.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a hot water hot air PTC heater, comprising a PTC shell and a hot water bracket, the PTC shell and the hot water bracket are an integrally formed structure, a water pipe is arranged in the hot water bracket, a PTC heating body is arranged in the PTC shell, and a hot air component is connected to the outer surface of the PTC shell.

[0006] After adopting the above technical solution, the utility model has the following advantages:

[0007] Changing the welding connection between the PTC housing and the hot water bracket to an integrated structure shortens the production cycle, reduces production costs, directly eliminates the gap between the PTC housing and the hot water bracket, improves the efficiency of heating water, and makes the production process more environmentally friendly and safer. After the PTC housing and the hot water bracket adopt an integrated structure, the overall structural strength is improved and the service life can be extended. Since the PTC housing and the hot water bracket are an integrated structure, they can also efficiently heat the nearby air while heating the water. In addition, when the PTC housing is overheated, the hot air component can also play a certain role in heat dissipation, which can protect the safety of the corresponding parts.

[0008] Furthermore, the PTC housing includes a side plate parallel to the hot water support and a connection portion connected between the long sides of the side plate and the hot water support, the side plate and the hot water support form a receiving cavity for receiving the PTC heating body, and the PTC heating body is deformed by the connection portion, so that the side plate is close to the hot water support and the PTC heating body is clamped and fixed. The above technical solution makes the method of fixing the PTC heating body simpler, convenient to operate, and easy to implement, and the contact area between the PTC heating body and the PTC housing is large, and the heating efficiency is high.

[0009] Furthermore, the hot water support is provided with a mounting hole, and the water pipe is inserted and fixed in the mounting hole. The above technical solution can shorten the single step time and improve the production efficiency.

[0010] Furthermore, two mounting holes are arranged in parallel and penetrate through both ends of the hot water bracket along the length direction of the hot water bracket. The water pipe is a U-shaped pipe. The straight section of the water pipe is inserted into the mounting hole and fixed. By adopting the above-mentioned technical scheme, the water in the water pipe is heated in two stages with a fast heating speed, thereby ensuring that the water temperature is more constant when the water comes out, and the water temperature will not be insufficient due to the excessively fast water flow rate in the water pipe.

[0011] Furthermore, after the water pipe is inserted into the mounting hole, the expansion deformation of the straight end of the water pipe and the interference fit with the mounting hole are used to achieve fixation. Compared with using in-mold forming or welding technology to fix the water pipe, the above-mentioned technical solution saves processing costs and time, and increases the contact area between the water pipe and the mounting hole, which can heat the water in the water pipe better and faster.

[0012] Furthermore, a temperature measuring hole is provided in the hot water support, and a fuse and / or a thermostat is provided in the temperature measuring hole. By adopting the aforementioned technical solution, the setting of the fuse can prevent dry boiling without water, and can protect other components after the thermostat fails. The setting of the thermostat can sense the water temperature in the water pipe in real time, and disconnect in time when the temperature reaches the target temperature.

[0013] Furthermore, the temperature measuring hole is located between the straight sections of the water pipe. By adopting the above-mentioned technical solution, since the straight sections of the water pipe belong to the area with higher temperature in the hot water support, the timeliness of the action of the fuse and / or thermostat can be ensured, thereby improving safety.

[0014] Furthermore, one end of the temperature measuring hole is closed and the other end is open and located on the end face of the hot water bracket. The opening of the temperature measuring hole is sealed by injecting glue. The above-mentioned technical solution is adopted to facilitate the processing of the hot water bracket, reduce manufacturing costs, ensure product quality, and facilitate the installation of fuses and / or thermostats.

[0015] Furthermore, the opening of the temperature measuring hole faces the curved section of the water pipe. By adopting the aforementioned technical solution, the wires of the fuse and / or the thermostat can avoid the inlet and outlet of the water pipe, thereby preventing water leakage at the inlet and outlet of the water pipe from causing a short circuit in the wires of the fuse and / or the thermostat.

[0016] Furthermore, the hot air element is a mesh structure, and adopts the above-mentioned technical solution, which can provide a larger contact area per unit volume to transfer heat to the air, so that the blown air can be heated better and faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The utility model is further described below in conjunction with the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of a hot water and hot air PTC heater in Embodiment 1 of the present utility model;

[0019] Figure 2 This is a cross-sectional view (front view) of a hot water and hot air PTC heater at a temperature measuring hole in Embodiment 1 of the present utility model;

[0020] Figure 3 This is a cross-sectional view (top view) of a hot water and hot air PTC heater at a temperature measuring hole in Example 1 of the utility model;

[0021] Figure 4This is a right side view of a hot water and hot air PTC heater in Embodiment 1 of the present utility model;

[0022] Figure 5 This is a cross-sectional view (top view) of a hot water and hot air PTC heater at a temperature measuring hole in Embodiment 2 of the present utility model;

[0023] Figure 6 This is a cross-sectional view (front view) of a hot water and hot air PTC heater at a temperature measuring hole in Example 2 of the utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0025] The terms "first", "second", etc. (if any) in the specification and claims of the present utility model are used to distinguish similar objects, rather than to describe a specific order or sequence. Even if "second" is used to distinguish a certain technical feature, it does not necessarily mean that it has "first". It should be understood that in the present utility model, "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. It should be understood that in the present utility model, "multiple" refers to two or more. "And / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, X and / or Y can represent: X exists alone, X and Y exist at the same time, and Y exists alone. The character " / " generally indicates that the related objects before and after are in an "or" relationship. "Contains X, Y and Z", "Contains X, Y, Z" means that X, Y, and Z are all included, "Contains X, Y or Z" means that one of X, Y, and Z is included, and "Contains X, Y and / or Z" means that any one, any two, or three of X, Y, and Z are included.

[0026] The following specific embodiments are used to describe the technical solution of the utility model in detail. The following specific embodiments can be combined or replaced with each other according to actual conditions, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0027] Embodiment 1:

[0028] like Figures 1 to 4As shown, this embodiment provides a hot water hot air PTC heater, including a PTC shell 1 and a hot water bracket 2, wherein the PTC shell 1 and the hot water bracket 2 are an integrally formed structure, a water pipe 3 is provided in the hot water bracket 2, a PTC heating body 4 is provided in the PTC shell 1, and a hot air component 5 is connected to the outer surface of the PTC shell 1. The welding connection between the PTC shell 1 and the hot water bracket 2 is changed to an integrally formed structure, which shortens the production cycle, reduces the production cost, directly eliminates the gap between the PTC shell 1 and the hot water bracket 2, improves the efficiency of heating water, and makes the production process more environmentally friendly and safe. After the PTC shell 1 and the hot water bracket 2 adopt an integrally formed structure, the overall structural strength is improved, the service life can be extended, and the nearby air can be efficiently heated while heating water, and when the PTC shell 1 is overheated, the hot air component 5 can also play a certain heat dissipation role, which can protect the safety of the corresponding components.

[0029] Specifically, during production, the PTC housing 1 and the hot water support 2 are made into an integral structure by using a technique such as die casting or mold casting, and then the PTC heating element 4 is installed in the PTC housing 1, and then the hot air component 5 is welded to the outer surface of the PTC housing 1, and finally the water pipe 3 is installed in the hot water support 2, or the water pipe 3 can be first installed in the hot water support 2, and then the hot air component 5 is welded to the outer surface of the PTC housing 1. During operation, after the PTC heating element 4 generates heat, since the PTC housing 1 and the hot water support 2 are an integral structure, the PTC housing 1 and the hot water support as a whole can directly transfer heat to the hot air component 5, which is beneficial for the hot air component 5 to heat the air, and because the PTC housing 1 and the hot water support 2 are an integral structure, the heat can also be directly transferred to the water in the water pipe 3.

[0030] In order to make the method of fixing the PTC heating body 4 simpler, convenient to operate, easy to implement, and make the contact area between the PTC heating body 4 and the PTC housing 1 larger and the heating efficiency higher, the PTC housing 1 can be designed to include a side plate 101 parallel to the hot water bracket 2 and a connecting portion 102 connected between the two long sides of the side plate 101 and the hot water bracket 2, the side plate 101 and the hot water bracket 2 form a receiving cavity 103 for receiving the PTC heating body 4, and the PTC heating body 4 is deformed through the connecting portion 102, so that the side plate 101 is close to the hot water bracket 2 and then clamps the PTC heating body 4 to fix it. By squeezing the side plate 101, the connecting portion 102 is deformed, resulting in a reduction in the space of the receiving cavity 103, so that the PTC heating body 4 can be fixed. In this way, when the PTC heating body is working, the heat can be directly conducted to the hot water bracket 2 through the PTC housing 1 by heat conduction, and the heating efficiency will not be low due to the large amount of air in the receiving cavity 103, and it plays a fixing role to ensure the stability of the transportation process and the working process. In addition to the method of fixing the PTC heater 4 by physical deformation of the connection portion 102 , the PTC heater 4 may also be fixed by filling the PTC housing 1 with glue that is resistant to high temperatures and has a high thermal conductivity.

[0031] Specifically, the connection portion 102 is deformed by curling and folding inward, and the PTC heater 4 is squeezed therein, so as to fix the PTC heater 4. At the same time, the air in the PTC housing 1 is reduced, which is conducive to improving the heating efficiency. It is understandable that the connection portion 102 can also be deformed by curling and folding outward to avoid squeezing the PTC heater 4 during the deformation process.

[0032] Furthermore, in order to fix the water pipe 3, a mounting hole 6 can be provided in the hot water bracket 2, and the mounting hole 6 is used for inserting and fixing the water pipe 3. The insertion and fixing method can shorten the single step time, speed up production efficiency, and can observe whether the water pipe 3 has quality problems such as cracks during installation, which can avoid certain losses and reduce the occurrence of the entire workpiece being scrapped due to water pipe quality problems after installation.

[0033] Furthermore, in order to facilitate the insertion of the water pipe 3, it can be designed that two mounting holes 6 are arranged in parallel and penetrate the two ends of the hot water bracket 2 along the length direction of the hot water bracket 2. The water pipe 3 is a U-shaped pipe, and the straight section of the water pipe 3 is inserted into the mounting hole 6 for installation and fixation. Due to the space limitations of the specific scene, in the hot water bracket 2 of fixed length, the water in the water pipe 3 is heated in two stages to ensure that the water temperature when the water is discharged is more constant, and the water temperature will not be insufficient due to the excessively fast water flow rate in the water pipe 3.

[0034] Furthermore, in order to fix the water pipe 3, after the water pipe 3 is inserted into the mounting hole 6, the expansion deformation of the straight end of the water pipe 3 and the interference fit with the mounting hole 6 can achieve fixation, and the traditional connection method is simple to operate, which is not only more environmentally friendly and safe, but also saves processing costs and time, and increases the contact area between the water pipe 3 and the mounting hole 6, which can better heat the water in the water pipe 3. It is understandable that it is also feasible to fix the water pipe 3 and the hot water bracket 2 by common methods such as furnace brazing.

[0035] Specifically, the interference fit can also be assembled by heat-fitting, and the hot water bracket 2 is heated. When the expansion amount of the mounting hole 6 reaches the requirement, that is, when the water pipe 3 can be installed in the mounting hole 6, the water pipe 3 is immediately inserted into the mounting hole 6, and the installation is completed after the hot water bracket 2 is cooled. It can be understood that the heating method can be heating by an inductive heater, heating by an electric furnace, or heating by an oil bath.

[0036] Furthermore, in order to accurately control the water temperature of the water pipe, a temperature measuring hole 9 can be provided in the hot water support 2, and a thermostat 8 can be provided in the temperature measuring hole 9. By adopting the above technical solution, the temperature in the water pipe 3 can be controlled, and when the temperature reaches the target temperature, it can be timely tripped to stop the PTC heating body from heating. In order to prevent dry burning without water, a fuse 7 can be provided in the temperature measuring hole 9. When the temperature of the hot water support 2 is excessive, the fuse 7 will melt and stop the PTC heating body 4 from heating. The fuse 7 and the thermostat 8 can also be installed together and connected in series to provide double protection.

[0037] Furthermore, in order to improve the safety of temperature sensing, the temperature measuring hole 9 is located between the straight sections of the water pipe 3. Since the temperature between the straight sections of the water pipe 3 belongs to a higher area, the timeliness of the action of the fuse and / or thermostat can be ensured, thereby improving safety.

[0038] Further, in order to facilitate the installation of the thermostat 8 and / or the fuse 7, one end of the temperature measuring hole 9 is closed, the other end is open and located on the end face of the hot water support 2, and the opening of the temperature measuring hole 9 is sealed by injecting glue. The temperature measuring hole 9 can be formed with the hot water support 2 by using a mold, or it can be formed by processing after the hot water support 2 is formed. Since one end of the temperature measuring hole 9 is closed, when installing the thermostat 8 and / or the fuse 7, the thermostat 8 and / or the fuse 7 can be prevented from falling out from the other side, and it is convenient to process the hot water support 2, reduce the manufacturing cost, and ensure the product quality. It is understandable that a metal cover can also be used for sealing. A waterproof sealing ring is provided at the matching part of the metal cover and the temperature measuring hole 9, and the wires of the thermostat 8 and / or the fuse 7 pass through the holes punched on the metal cover. The holes of the metal cover are then sealed by injecting glue to ensure the sealing. The use of a metal cover for sealing can facilitate the subsequent maintenance and convenient opening of the temperature measuring hole 9. In particular, after the fuse 7 is blown, the entire workpiece cannot work, so the use of a metal cover can facilitate maintenance.

[0039] Furthermore, in order to extend the life of the thermostat 8 and / or the fuse 7 and reduce the occurrence of short-circuit accidents, the opening of the temperature measuring hole 9 faces the curved section of the water pipe 3, which can prevent water leakage at the inlet and outlet of the water pipe 3 from causing a short circuit in the fuse 7 and / or the thermostat 8 wires.

[0040] Furthermore, in order to improve the efficiency of hot air, the hot air component 5 is a mesh structure, and the aforementioned technical solution can provide a larger contact area to transfer heat to the air, so that the blown air is better heated. The structure of the hot air component 5 is a heat conduction plate arranged crosswise between the upper and lower cover plates, and ventilation holes are formed between the heat conduction plates. The heat can be quickly transferred to the air by capillary action. It can be understood that the hot air component 5 can be square, round or oval fins; and the arrangement of the fins can be sequential or staggered.

[0041] The hot air element 5 can be fixed on the outer surface of the PTC housing away from the hot water support, that is, the hot air element 5 and the hot water support 2 are respectively located on both sides of the PTC heating body 4, so that the heating effect is relatively uniform and the thermal energy utilization rate is high. The hot air element can also be distributed on the side plate and the connecting part according to actual needs. The direction of air flow in the hot air element 5 can be perpendicular to or parallel to the straight section of the water pipe, can also be inclined relative to the straight section of the water pipe, and can also be designed to be curved.

[0042] Embodiment 2:

[0043] like Figure 5 and Figure 6 As shown, in this embodiment, four mounting holes 6 are arranged in parallel and penetrate the two ends of the hot water support 2 along the width direction of the hot water support 2. The water pipe 3 adopts a serpentine structure, specifically composed of two U-shaped pipes, and connected at adjacent U-shaped pipes. The connection is welded with an arc-shaped water pipe. The straight section of the water pipe 3 is inserted into the mounting hole 6 for installation and fixation. The above-mentioned technical solution is adopted to provide four-stage heating for the water in the water pipe 3, ensuring that the water flow with a lower temperature reaches the expected water temperature faster after four-stage heating, and the water temperature of the outlet water will not reach the expected temperature due to the excessively fast water flow rate in the water pipe 3 or the low inlet water temperature. It can be understood that the connection method of the two U-shaped pipes and the arc-shaped water pipe can also be sealed and connected using other common methods. When the inlet water temperature is low and the space is limited in the specific scene, the water in the water pipe 3 is heated in four stages in the hot water support 2 of a fixed length, ensuring that the water temperature of the outlet water quickly reaches the expected set water temperature.

[0044] In addition to the above-mentioned preferred embodiments, the present invention also has other implementations. For example, the water pipe 3 includes three straight line segments or five straight line segments, etc. As long as they are based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection requested by the present invention.

Claims

1. A hot water hot air PTC heater, comprising a PTC housing and a hot water bracket, characterized in that: The PTC shell and the hot water support are an integrally formed structure. A water pipe is arranged in the hot water support, a PTC heating body is arranged in the PTC shell, and a hot air component is connected to the outer surface of the PTC shell.

2. A hot water hot air PTC heater according to claim 1, characterized in that: The PTC shell includes a side plate parallel to the hot water bracket and a connecting portion connected between the long sides of the side plate and the hot water bracket. The side plate and the hot water bracket form a accommodating cavity for accommodating the PTC heating body. The PTC heating body is deformed by the connecting portion, so that the side plate is close to the hot water bracket and the PTC heating body is clamped and fixed.

3. The hot water hot air PTC heater according to claim 1, characterized in that: The hot water bracket is provided with a mounting hole, and the water supply pipe is inserted and fixed in the mounting hole.

4. The hot water hot air PTC heater according to claim 3, characterized in that: Two mounting holes are arranged in parallel and penetrate through both ends of the hot water bracket along the length direction of the hot water bracket. The water pipe is a U-shaped pipe, and the straight section of the water pipe is inserted into the mounting hole for installation and fixation.

5. The hot water hot air PTC heater according to claim 4, characterized in that: After the water pipe is inserted into the installation hole, the straight section of the water pipe is expanded and deformed to achieve interference fit with the installation hole to achieve fixation.

6. The hot water hot air PTC heater according to claim 4, characterized in that: The hot water support is provided with a temperature measuring hole, and a fuse and / or a temperature controller is provided in the temperature measuring hole.

7. The hot water hot air PTC heater according to claim 6, characterized in that: The temperature measuring holes are located between the straight sections of the water pipe.

8. The hot water hot air PTC heater according to claim 6, characterized in that: One end of the temperature measuring hole is closed, the other end is open and is located on the end surface of the hot water support, and the opening of the temperature measuring hole is sealed by glue injection or by a metal cover.

9. The hot water hot air PTC heater according to claim 8, characterized in that: The opening of the temperature measuring hole faces the curved section of the water pipe.

10. The hot water hot air PTC heater according to claim 1, characterized in that: The hot air component is a mesh structure.

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