阅读说明：本技术 电加热器、空调器和家用电器 (Electric heater, air conditioner and household appliance ) 是由 吴斌 苏琪婷 乐志凯 邓智 杨辉煌 于 2021-07-22 设计创作，主要内容包括：本发明提供一种电加热器、空调器和家用电器,电加热器包括发热芯、加热管、散热器和密封件,加热管中空且两端均具有端口,发热芯插入加热管内且发热芯的接电端伸出端口外,散热器连接在加热管外,密封件封堵端口；PTC加热器还包括集气气囊,集气气囊设置在加热管外,集气气囊与加热管连通并构成密封空间。空调器和家用电器内设有电加热器。本发明利用与加热管连通的集气气囊解决加热管内高压问题,防止高压使铝管形成不可复原的膨胀缝隙,保证内部气流空间的密封性,防止水汽进入,避免短路击穿损坏加热管。(The invention provides an electric heater, an air conditioner and a household appliance, wherein the electric heater comprises a heating core, a heating pipe, a radiator and a sealing element, the heating pipe is hollow, two ends of the heating pipe are respectively provided with a port, the heating core is inserted into the heating pipe, an electric connection end of the heating core extends out of the port, the radiator is connected outside the heating pipe, and the sealing element seals the port; the PTC heater also comprises a gas collecting air bag which is arranged outside the heating pipe and communicated with the heating pipe to form a sealed space. Electric heaters are arranged in the air conditioner and the household appliance. The invention solves the problem of high pressure in the heating pipe by using the gas collecting air bag communicated with the heating pipe, prevents the high pressure from forming an unrecoverable expansion gap on the aluminum pipe, ensures the sealing property of the internal airflow space, prevents water vapor from entering, and avoids short circuit breakdown and damage to the heating pipe.)

1. The electric heater comprises a heating core, a heating pipe, a radiator and a sealing piece, wherein the heating pipe is hollow, two ends of the heating pipe are respectively provided with a port, the heating core is inserted into the heating pipe, an electric connection end of the heating core extends out of the port, the radiator is connected outside the heating pipe, and the sealing piece blocks the port;

the method is characterized in that:

the heater also comprises a gas collection air bag which is arranged outside the heating pipe, and the gas collection air bag is communicated with the heating pipe to form a sealed space.

2. The electric heater of claim 1, wherein:

the gas collection air bag is communicated with the end part of the heating pipe in the length direction.

3. The electric heater of claim 2, wherein:

the gas collecting air bag is connected to the sealing piece.

4. An electric heater as claimed in claim 2 or 3, wherein:

the gas collection air bag is communicated with one end of the heating pipe, which is far away from the electric connection end in the length direction.

5. An electric heater as claimed in claim 2 or 3, wherein:

the peripheral wall of the heating pipe and the heating core form an airflow gap, and the communication position of the gas collection air bag and the heating pipe is opposite to the airflow gap.

6. The electric heater of claim 5, wherein:

and a communication gap is formed between the end part of the heating pipe in the length direction and the sealing element, and the airflow gap is communicated with the communication gap.

7. An electric heater as claimed in any one of claims 1 to 3, wherein:

the gas collection air bag is tubular, and the extending end part of the gas collection air bag is communicated with the heating pipe.

8. An electric heater as claimed in any one of claims 1 to 3, wherein:

the gas collection air bag is made of flexible materials and/or elastic materials.

9. An electric heater as claimed in any one of claims 1 to 3, wherein:

the gas collection air bag is made of rubber materials or silica gel materials.

10. An air conditioner, characterized in that: an electric heater comprising any one of the preceding claims 1 to 9.

11. A household appliance, characterized in that: an electric heater comprising any one of the preceding claims 1 to 9.

Technical Field

The invention relates to the technical field of electric heating devices, in particular to an electric heater, an air conditioner and a household appliance.

Background

An electric heater is provided in an air conditioner or some household appliances for heating. The existing PTC electric heater comprises a heating core, a hollow aluminum tube and a radiator, wherein the heating core comprises a positive electrode plate, a negative electrode plate, a ceramic plate arranged between the positive electrode plate and the negative electrode plate and insulating paper wrapping the peripheries of the positive electrode plate, the negative electrode plate and the ceramic plate, the heating core which is extended into a long shape is inserted into the aluminum tube from an aluminum tube port, electric connection ends connected with the positive electrode plate and the negative electrode plate on the heating core are exposed, the radiator comprises aluminum strips and a plurality of radiating fins arranged between the two aluminum strips, and the aluminum strips are tightly attached to the outer wall surface of the aluminum tube.

When the PTC electric heaters are heated at high temperature, gas in the aluminum pipe is discharged due to high pressure, and when the PTC electric heaters stop working and return to normal temperature, external water vapor is sucked into the pipe by negative pressure, therefore, some PTC electric heaters are provided with sealing elements made of rubber or silica gel materials, and the sealing elements plug the end opening of the aluminum pipe to seal the aluminum pipe.

However, when the PTC electric heater works, high pressure is formed in the sealed aluminum tube, an unrecoverable expansion gap is formed in the aluminum tube, so that the internal structure of the aluminum tube is peeled and loosened, foreign matters are generated due to ceramic wafer breakage, the aluminum tube is damaged due to short circuit breakdown, and external water vapor enters to form accumulated water to further cause short circuit breakdown.

Disclosure of Invention

The first purpose of the invention is to provide an electric heater which effectively solves the problems of high-pressure expansion and water inflow of a heating pipe.

A second object of the present invention is to provide an air conditioner which effectively solves the problems of high-pressure expansion and water inflow of a heating pipe of an electric heater.

A third object of the present invention is to provide a household appliance which effectively solves the problems of high-pressure expansion and water inflow of a heating tube of an electric heater.

The electric heater provided by the first purpose of the invention comprises a heating core, a heating pipe, a radiator and a sealing element, wherein the heating pipe is hollow, two ends of the heating pipe are respectively provided with a port, the heating core is inserted into the heating pipe, the electric connection end of the heating core extends out of the port, the radiator is connected outside the heating pipe, and the port is plugged by the sealing element; the PTC heater also comprises a gas collecting air bag which is arranged outside the heating pipe and communicated with the heating pipe to form a sealed space.

According to the scheme, the gas collecting air bag is additionally arranged, the gas collecting air bag is communicated with the heating pipe to form a sealed space, when the electric heater works to generate high temperature and generate high air pressure in the heating pipe, high-pressure gas is transferred into the low-pressure gas collecting air bag, and the gas enters the gas collecting air bag to expand or elastically expand the gas collecting air bag until the pressure balance between the gas collecting air bag and the heating pipe is achieved; when the electric heater stops working and recovers to normal temperature or low temperature, negative pressure is formed in the heating pipe, high-pressure gas in the gas collection air bag is sucked out of the heating pipe, and the gas collection air bag retracts. This setting can prevent that high pressure from making the aluminum pipe form the not recoverable expansion gap, guarantees the leakproofness in inside air current space, prevents that steam from getting into, avoids the short circuit to puncture and damages the heating pipe.

The further proposal is that the gas collecting air bag is communicated with the end part of the heating pipe in the length direction.

It can be seen from above that, the gas collection gasbag communicates the tip on the length direction of heating pipe and does benefit to production and processing, avoids establishing the opening in addition to the heating pipe and connects and improve sealed effect, communicates along the air current passageway extending direction and makes to switch on more reliably between gas collection gasbag and the heating pipe. In addition, the end part in the length direction is far away from the electric heating heat source, the gas collection air bag can be prevented from being aged at an accelerated speed, the pressure difference between the gas collection air bag and the heating pipe can be further improved, the pressure storage capacity of the gas collection air bag is favorably improved, in addition, the gas collection air bag is arranged at the position far away from the electric heating heat source, the obvious temperature difference can be formed more favorably, the temperature difference is larger, the pressure difference is larger, and the effect is better in the played buffering.

In a further proposal, the gas collecting air bag is connected with the sealing element.

From top to bottom, this setting is convenient for process and installation, and guarantees the leakproofness.

The gas collecting air bag is communicated with the end part of the heating pipe far away from the electric connection end in the length direction.

From top to bottom, avoid the power connection end functional area that staggers, do benefit to the installation and avoid during operation mutual interference.

The further proposal is that an airflow gap is formed between the peripheral wall of the heating tube and the heating core, and the communication part of the gas collecting air bag and the heating tube is opposite to the airflow gap.

Therefore, the arrangement can improve the communication effect of the heating pipe and the gas collecting air bag and ensure that gas is transferred.

Further scheme is, form the intercommunication clearance between the tip on the length direction of heating pipe and the sealing member, air current clearance and intercommunication clearance intercommunication.

Therefore, the arrangement enhances the connectivity of the space in the heating pipe and the air flow, the internal space is effectively communicated with the air collecting air bag, and the formation of local high pressure is avoided.

The further proposal is that the gas-collecting air bag is tubular, and the extending end part of the gas-collecting air bag is communicated with the heating pipe.

It is thus clear that this setting is convenient to carry out limited space layout installation and fixed inside the air conditioner, and elongated structure accords with the rectangular structural feature of electrical heating, and the production and processing of being convenient for does benefit to packing transportation and protection.

In a further proposal, the gas-collecting air bag is made of flexible material and/or elastic material.

In another further scheme, the gas collection air bag is made of a rubber material or a silica gel material.

From the above, the gas collection gasbag is used on the electric heater and needs to buffer high pressure, so the above arrangement can improve the performance of the gas collection gasbag and prolong the service life of the gas collection gasbag.

The air conditioner provided by the second object of the invention comprises the electric heater.

A third object of the present invention is to provide a household appliance comprising the electric heater described above.

Drawings

Fig. 1 is a sectional view of an embodiment of an electric heater of the present invention.

Fig. 2 is a cross-sectional view of an embodiment of the electric heater of the present invention in an extended direction.

Fig. 3 is a first partial cross-sectional view of an embodiment of an electric heater of the present invention.

Fig. 4 is a second partial sectional view of an electric heater embodiment of the present invention.

Detailed Description

Referring to fig. 1, the electric heater of the present embodiment includes a heat generating core 1, a heating pipe 2, a radiator 3, a metal terminal 4, a first sealing member 51, a second sealing member 52, a third sealing member 53, and a gas collecting pipe 6, wherein the first sealing member 51 and the second sealing member 52 are sealing members of the present invention, and the gas collecting pipe 6 is a gas collecting air bag of the present invention.

Referring to fig. 1 and 2, the x-axis direction is the length direction of the heating core 1 and the heating pipe 2, and the heating core 1 includes a plurality of ceramic sheets 11 arranged along the x-axis direction, two electrode plates 12 extending along the x-axis direction and disposed at two opposite sides of the plurality of ceramic sheets 11, and insulating paper 13 wrapping the outer peripheries of the electrode plates 12 and the ceramic sheets 11.

Referring to fig. 1 to 4, the heating tube 2 is a hollow aluminum tube with a rectangular cross section, the heating tube 2 has a first port 208 and a second port 209 at two ends in the length direction, and the first port 208 and the second port 209 are both ports of the present invention. The heating core 1 is inserted into the heating tube 2 from the first port 208, the electric connection end 18 of the heating core 1 extends out of the first port 208 from the first port 208, and the parts of the two electrode plates 12 located at the electric connection end 18 are respectively connected with the two metal terminals 4.

The first sealing element 51, the second sealing element 52 and the third sealing element 53 are all made of rubber materials with poor high temperature resistance and hydrophilicity, a gap space 200 is formed between the heating core 1 and the inner wall of the heating tube 2, the gap space 200 is communicated to the first port 208 and the second port 209, the first sealing element 51 blocks the first port 208, the second sealing element 52 blocks the second port 209, and the third sealing element 53 blocks the end of the electric connection end 18. In this embodiment, the second sealing member 52 is inserted into the second port 209 of the heating tube 2.

Referring to fig. 1 and 2, the two radiators 3 are respectively and fixedly connected to two opposite sides of the heating pipe 2, the radiators 3 include two aluminum strips 32 and a wave-shaped heat sink 31 disposed between the two aluminum strips 32, and the surfaces of the aluminum strips 32 are connected to the surface of the heating pipe 2.

Referring to fig. 3 and 4, the gap space 200 includes an air flow gap 201 formed in the outer periphery of the heat generating core 1 and a communication gap 202 formed between the end portion of the heat generating core 1 in the length direction and the second seal member 52, the communication gap 202 communicating with the air flow gap 201.

Referring to fig. 1 and 4, the gas collecting tube 6 is made of high temperature resistant rubber material, the gas collecting tube 6 has flexibility and elasticity, and the gas collecting tube 6 can be expanded in an internal high pressure state and can be contracted to the original size after being depressurized. The gas collecting pipe 6 is elongated, in this embodiment, the length of the gas collecting pipe 6 is about 1/4 of the length of the heating pipe 2, and the inner diameter of the gas collecting pipe 6 is phi 6. The extended end of the gas collector 6, which is fixed to the second seal 52 and passes through the second seal 52 so that the inner space of the gas collector 6 communicates with the interspace 200 of the heating tube 2 and forms a sealed space, has a single gas flow inlet 61, and the gas collector 6 is arranged outside the heating tube 2. In addition, the airflow inlet 61 faces the airflow gap 201. When the electric heater works to generate high temperature and generate high air pressure in the heating pipe 2, high-pressure air can be transferred into the low-pressure air collecting pipe 6, and the air enters the air collecting pipe 6 to expand and elastically expand until pressure balance is achieved between the air collecting pipe 6 and the heating pipe 2. When the electric heater stops working and recovers to normal temperature or low temperature, negative pressure is formed in the heating pipe 2, high-pressure gas in the gas collecting pipe 6 is sucked out of the heating pipe 2, and the gas collecting pipe 6 retracts. The invention can prevent the heating pipe 2 from forming an unrecoverable expansion gap under high pressure, ensure the sealing property of the internal airflow space, prevent water vapor from entering, and avoid short circuit breakdown and damage to the heating pipe 2.

In other embodiments, the gas collection bladder has other contours, such as a spherical shape.

In other embodiments, the gas collecting air bag is communicated with one end of the heating pipe, at which the electric connection end of the heating core is positioned, in the length direction.

In other embodiments, the gas collecting air bag is communicated with the middle part of the heating pipe except two ends of the length of the heating pipe, a communication hole communicated to the air flow gap is additionally arranged on the side wall of the heating pipe which is not connected with the radiator, and the gas collecting air bag is communicated with the inside of the heating pipe through the communication hole.

In other embodiments, the gas collection bladder is made of a silicone material.

In other embodiments, the gas collection bladder is made of a flexible but inelastic material that inflates when inflated and deflates when deflated.

In other embodiments, the number of gas collecting bladders is two or more.

In other embodiments, the first seal for sealing the heating tube port and the third seal for sealing the end of the heat generating core are provided as an integral sealing sleeve.

In other embodiments, the gas collecting air bag is provided with a hard connecting end, and after the connecting end is fixedly connected with the heating pipe, the sealing element blocks the rest exposed position of the port.

From top to bottom, because the gas collection gasbag sets up in the outside of heating pipe, shape, profile, size and the material of gas collection gasbag can be selected and confirm according to exhaust demand, high temperature resistant demand, air conditioner or domestic appliance internally mounted space demand, therefore have fine suitability and go to satisfy different occasion electric heater's user demand. In addition, when the gas collecting air bag is arranged at the end part of the heating pipe, the gas collecting air bag can be fixed on the sealing element firstly, and then the sealing element and the gas collecting air bag are fixed on the heating pipe together, so that the manufacturing and assembling difficulty is reduced.

The air conditioner and the household appliance provided by the invention are internally provided with the electric heater provided by the invention.

Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.