CN106402998A - Electric heater - Google Patents

Abstract

The invention relates to the field of home appliances, and discloses an electric heater, wherein the electric heater comprises a shell (10) and an oil heating device (20) arranged in the shell (10), the shell There is an air flow channel between the body (10) and the oil heating device (20), the upper part of the housing (10) is provided with an air outlet (11), and the lower part of the housing (10) is provided with an inlet The air outlet (12), the flow area of the air inlet (12) is larger than the flow area of the air outlet (11). The air undergoes heat exchange around the heating device and is heated up to form a good air flow through the air inlet and outlet. By making the flow area of the air inlet smaller than the flow area of the air outlet, the air can stay in the shell for a longer time to obtain more heat, so that it can provide better heating performance to the surrounding when it is discharged, and the ambient temperature can be rapidly increased. rise.

Description

electric heater

technical field

The present invention relates to the field of household appliances, in particular to an electric heater.

Background technique

Existing electric heaters usually use heat sinks to supply heat to the surrounding environment through thermal radiation, but this way of heating the surrounding environment is relatively slow, and it takes a long time for users to feel warm.

Therefore, existing electric heaters have the problem of slow heating.

Contents of the invention

The object of the present invention is to provide an electric heater for rapid heating, so that the user can quickly obtain a warm feeling.

In order to achieve the above object, the present invention provides an electric heater, wherein the electric heater includes a casing and an oil heating device arranged in the casing, and the gap between the casing and the oil heating device is An air flow passage is provided, an air outlet is provided on the upper part of the casing, and an air inlet is arranged on the lower part of the casing, and the flow area of the air inlet is larger than the flow area of the air outlet.

Preferably, the ratio of the flow area of the air inlet to the flow area of the air outlet is 5:4 to 5:3.

Preferably, the ratio of the flow area of the air inlet to the flow area of the air outlet is 10:7 to 10:6.1.

Preferably, the air inlet and the air outlet are disposed on opposite sides of the casing along a height direction.

Preferably, the air inlet includes a plurality of first through holes disposed at the bottom of the housing, and the flow area of the air inlet is the sum of the flow areas of the plurality of first through holes; and/or, The air outlet includes a plurality of second through holes arranged on the top of the housing, and the flow area of the air outlet is the sum of the flow areas of the plurality of second through holes.

Preferably, the first through holes are elongated, a plurality of the first through holes are arranged in parallel and arranged at equal intervals along the length direction of the housing, and/or the second through holes are elongated The plurality of second through holes are arranged in parallel and arranged at equal intervals along the length direction of the housing.

Preferably, the size of the first through hole is the same as that of the second through hole, or the flow area of the first through hole is larger than the flow area of the second through hole.

Preferably, the air inlet and the air outlet are arranged oppositely along the height direction of the casing.

Preferably, the housing includes a base plate and a cover installed on the base plate, the oil heating device is installed on the base plate, the air inlet is set on the base plate, and the air outlet is set on the base plate the top of the cover.

Preferably, the electric heater includes rollers arranged on the lower side of the bottom plate.

Preferably, the cover body includes side walls extending along the length direction of the oil heating device and arranged on both sides of the oil heating device, at least one of the side walls is inclined inwardly relative to the bottom plate.

Preferably, the side wall includes a first side wall and a second side wall, and the first side wall and the second side wall are both inclined inwardly relative to the bottom plate, and the inclination of the first side wall is greater than According to the degree of inclination of the second side wall, a drying portion is provided on the outer side of the first side wall.

Preferably, an auxiliary heating device is provided in the housing.

Preferably, the auxiliary heating device includes a heat dissipation aluminum sheet and a heating element installed on the heat dissipation aluminum sheet.

Preferably, the oil heating device includes a heat sink filled with heat conduction oil and a heating element arranged in the heat sink.

Through the above technical solution, the air undergoes heat exchange around the oil heating device and rises when heated, so that a good air flow is formed through the air inlet and the air outlet, so that the cold air enters the housing from the air inlet to perform heat exchange and heat up. The air is exhausted from the air outlet to supply heat to the surrounding environment. By making the flow area of the air inlet smaller than the flow area of the air outlet, the air can stay in the shell for a longer time to obtain more heat, so that it can provide better heating performance to the surrounding when it is discharged, and the ambient temperature can be rapidly increased. rise.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, together with the following specific embodiments, are used to explain the present invention, but do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a schematic structural view illustrating an embodiment of an electric heater of the present invention, wherein a part of the internal structure of the housing is shown in a partially cut-away manner;

FIG. 2 is a side plan view of FIG. 1 .

Explanation of reference signs

10-housing, 11-air outlet, 11a-second through hole, 12-air inlet, 13-bottom plate, 14-cover body, 14a-first side wall, 14b-second side wall, 20-oil heater Device, 30-roller, 40-drying part.

detailed description

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

In the present invention, in the case of no contrary description, the used orientation words such as "up, down, left and right" usually refer to the up, down, left and right shown in the accompanying drawings; "inside and outside" Refers to the inside and outside of the outline of each part itself.

The present invention provides an electric heater, wherein the electric heater includes a casing 10 and an oil heating device 20 arranged in the casing 10 , the connection between the casing 10 and the oil heating device 20 There is an air flow channel between them, the upper part of the housing 10 is provided with an air outlet 11 , and the lower part of the housing 10 is provided with an air inlet 12 , the flow area of the air inlet 12 is larger than the flow area of the air outlet 11 .

Using the electric heater of the present invention, the air undergoes heat exchange around the oil heating device 20 and is heated up, resulting in a pressure difference between upper and lower air in the air flow channel, thereby forming a good air flow through the air inlet 12 and the air outlet 11, That is to say, cold air enters the housing 10 from the air inlet 12 to perform heat exchange and heat up, and the heated air is discharged from the air outlet 11 to supply heat to the surrounding environment. This heating method is different from ordinary radiation heat dissipation, but the hot air is directly discharged into the ambient air, the user's heating feeling is more gentle, and the heating is faster. By making the flow area of the air inlet 12 smaller than the flow area of the air outlet 11, the air can stay in the housing 10 for a longer time to obtain more heat, thereby providing better heating performance to the surrounding when it is discharged. The ambient temperature rises rapidly.

Wherein, the flow area of the air inlet 12 and the flow area of the air outlet 11 can be set accordingly according to the needs, so as to take into account the sufficient heat exchange and rapid discharge of the air in the housing 10 to quickly supply heat, thereby obtaining good heat dissipation Effect. Preferably, the ratio of the flow area of the air inlet 12 to the flow area of the air outlet 11 is 5:4 to 5:3. More preferably, the ratio of the flow area of the air inlet 12 to the flow area of the air outlet 11 is 10:7 to 10:6.1. By reasonably setting the ratio of the flow area of the air inlet 12 to the flow area of the air outlet 11 , a better heating effect can be obtained. The effects of the preferred embodiments of the present invention are illustrated below by way of examples.

Example

The electric heater with the structure shown in Figure 1 and Figure 2, wherein the power of the oil heating device 20 is 2200W, the ratio of the cross-sectional area (i.e. the flow area) of the air inlet 12 to the cross-sectional area (i.e. the flow area) of the air outlet 11 is n, and detects the air outlet velocity v1 of the air outlet 11 after the boot is stable.

The test results of the examples are shown in Table 1.

Table 1

no 5:4 10:7 10:6.5 10:6.1 5:3 v1(m/s) 0.45 0.75 1.0 1.05 0.87

It can be seen from Table 1 that by setting the ratio of the flow area of the air inlet 12 to the flow area of the air outlet 11 within the above-mentioned preferred range, the electric heater of the present invention has a faster air outlet speed and can rapidly improve Indoor temperature, with good heat dissipation efficiency.

In addition, preferably, the air inlet 12 and the air outlet 11 may be arranged on opposite sides of the housing 10 along the height direction, so as to form a convection effect and further improve the air outlet speed and heat dissipation effect. In order to evenly heat the air entering from the air inlet 12, the air inlet 12 may include a plurality of first through holes arranged at the bottom of the housing 10, and the flow area of the air inlet 12 is equal to that of the plurality of first through holes. The sum of the flow areas of the through holes. In addition, for uniform heat dissipation, the air outlet 11 may include a plurality of second through holes 11a arranged on the top of the housing 10, and the flow area of the air outlet 11 is equal to that of the plurality of second through holes 11a. The sum of the circulation area. Of course, the present invention does not exclude the form of an integral opening of the air inlet 12 and/or the air outlet 11 .

More preferably, the first through holes can be elongated, and a plurality of the first through holes are arranged in parallel and arranged at equal intervals along the length direction of the housing 10 to provide more space along the length direction of the housing 10. Even air intake. Similarly, as shown in FIG. 2, the second through holes 11a may also be elongated, and a plurality of the second through holes 11a are arranged in parallel and arranged at equal intervals along the length direction of the housing 10, so as to The length direction of the housing 10 provides a more uniform air outlet. Wherein, it can be understood that the length direction of the housing 10 corresponds to the length direction of the oil heating device 20 inside the housing 10 , that is, the length direction of the heating part of the oil heating device 20 .

Wherein, the size of the first through hole and the second through hole 11a can be the same, so in order to realize the ratio of the above flow cross section, only the number of the first through hole and the second through hole 11a needs to be set. Optionally, the size of the first through hole and the second through hole 11a can be different, for example, the flow area of the first through hole can be greater than the flow area of the second through hole 11a (for example, the flow area of the first through hole The ratio of the flow area to the second through hole 11a may be 5:4 to 5:3), so the number of the first through hole and the number of the second through hole 11a may be the same. Of course, it is also possible that the size of the first through hole is smaller than the size of the second through hole 11a, as long as the above-mentioned ratio of the flow area of the air inlet 12 to the flow area of the air outlet 11 is satisfied.

According to the form of the housing 10 , the air inlet 12 and the air outlet 11 can be arranged at corresponding structures of the housing 10 . For example, as shown in Figures 1 and 2, the housing 10 may include a base plate 13 and a cover 14 mounted on the base plate 13, the oil heating device 20 is mounted on the base plate 13, and the The air outlet 12 is arranged on the bottom plate 13 , and the air outlet 11 is arranged on the top of the cover 14 . Thus, the air can enter from the bottom of the housing 10 and exit from the top to pass through the entire height of the oil heating device 20 and fully exchange heat with the oil heating device 20 . Wherein, the top of the cover body 14 includes the top surface of the cover body 14 and the area near the top surface of the side surface of the cover body 14 . In the case that the air outlet 11 is arranged on the side of the cover 14 near the top surface, the air will enter from the bottom of the housing 10, rise up and be blocked by the top surface of the cover 14 and turn, and then pass through the air outlet. 11 discharge. In order to avoid the energy loss caused by such turning, preferably, as mentioned above, the air outlet 11 can be arranged on the top surface of the cover body 14 to form a convection effect and ensure the air outlet speed. More preferably, the air inlet 12 and the air outlet 11 are disposed opposite to each other along the height direction of the housing 10 , so as to further ensure the smooth flow of air in the housing 10 .

In addition, in order to provide portability, the electric heater may be provided in a movable form. For this purpose, as shown in FIG. 1 , the electric heater may include rollers 30 disposed on the lower side of the bottom plate 13 .

In addition, preferably, the cover body includes side walls extending along the length direction of the oil heating device 20 and arranged on both sides of the oil heating device 20 , at least one of the side walls is opposite to the bottom plate 13 Slope the setting inwards. In this way, the air can be gathered during the process of rising from the air inlet 12 to the air outlet 11 in the housing 10 , so that the air can be discharged from the air outlet 11 with accelerated pressure, further improving the heating effect. Specifically, the side walls include a first side wall 14a and a second side wall 14b, wherein the first side wall 14a and the second side wall 14b can both be set to be inclined inwardly relative to the bottom plate 13 (that is, upward from the bottom plate 13 Inwardly inclined), it is also possible to make one of the first side wall 14a and the second side wall 14b inwardly inclined relative to the bottom plate 13, while the other remains vertical. Preferably, as shown in FIG. 1, both the first side wall 14a and the second side wall 14b are inclined inwardly relative to the bottom plate 13, and the degree of inclination of the first side wall 14a is greater than that of the second side wall. The degree of inclination of the wall 14b, the outer side of the first side wall 14a is provided with a drying portion 40 (for example, in the form of a handle or a boss). Wherein, the inclination of the first side wall 14a is relatively large, which provides a favorable installation space for setting the drying part 40, and the second side wall 14b is set to incline inwards, which can avoid when the electric heater is close to a vertical object (such as a wall, Cabinet) is placed in direct contact with the vertical object to affect heat dissipation and wear.

In addition, in the present invention, the heating device 20 may include a heat sink filled with heat conducting oil and a heating element arranged in the heat sink. Wherein, the electric heater may also include a power supply part (such as a line, etc.) that provides electric energy to the heating element, and the external power supply part of the power supply part may extend from the through hole on the casing 10 to the outside of the casing 10 .

Preferably, an auxiliary heating device may be provided in the housing 10 to assist in heating. Wherein, the auxiliary heating device may be a device that heats up faster than the oil heating device 20, such as a serial aluminum heating device. Specifically, the auxiliary heating device may include a heat dissipation aluminum sheet and a heating element installed on the heat dissipation aluminum sheet. Wherein, the series aluminum heating device may include a plurality of heat dissipation aluminum sheets connected side by side in series, and there may be multiple heating elements installed on the heat dissipation aluminum sheets in a direct contact manner (for example, by riveting). Thus, when the electric heater is turned on, the auxiliary heating device and the oil heating device 20 can be heated at the same time, so that at the initial stage of turning on the electric heater, the series aluminum heating device with rapid heat generation and heat conduction is mainly used for rapid heating, so that consumption The patient will soon be able to get a warm feeling.

The preferred embodiment of the present invention has been described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the specific details of the above embodiment, within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, These simple modifications all belong to the protection scope of the present invention.

In addition, it should be noted that the various specific technical features described in the above specific implementation manners may be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, various possible combinations are not further described in the present invention.

In addition, various combinations of different embodiments of the present invention can also be combined arbitrarily, as long as they do not violate the idea of the present invention, they should also be regarded as the disclosed content of the present invention.

Claims (15)

1. a kind of electric heater is it is characterised in that described electric heater includes housing (10) and the oil being arranged in described housing (10) Spit of fland heater (20), has air flow passage between described housing (10) and described oil Heater heater (20), described shell The top of body (10) is provided with air outlet (11), and the bottom of described housing (10) is provided with air inlet (12), described air inlet (12) circulation area is more than the circulation area of described air outlet (11).

2. electric heater according to claim 1 is it is characterised in that the circulation area of described air inlet (12) and described air-out The ratio of the circulation area of mouth (11) is 5：4 to 5：3.

3. electric heater according to claim 2 is it is characterised in that the circulation area of described air inlet (12) and described air-out The ratio of the circulation area of mouth (11) is 10：7 to 10：6.1.

4. electric heater according to claim 1 is it is characterised in that described air inlet (12) and described air outlet (11) are arranged The side relative along short transverse in described housing (10).

5. the electric heater according to any one in claim 1-4 is it is characterised in that described air inlet (12) includes setting In multiple first through holes of the bottom of described housing (10), the circulation area of described air inlet (12) is multiple described first through holes Circulation area summation；And/or, described air outlet (11) includes being arranged on multiple the of the top of described housing (10) Two through holes (11a), the circulation area of described air outlet (11) is the summation of the circulation area of multiple described second through holes (11a).

6. electric heater according to claim 5 it is characterised in that described first through hole be strip, multiple described first Through hole be arranged in parallel and the length direction along described housing (10) arranges at equal intervals, and/or, described second through hole (11a) For strip, multiple described second through holes (11a) be arranged in parallel and the length direction along described housing (10) arranges at equal intervals.

7. electric heater according to claim 5 is it is characterised in that the size of described first through hole and the second through hole (11a) Unanimously, or described first through hole circulation area be more than described second through hole (11a) circulation area.

8. the electric heater according to any one in claim 1-4 is it is characterised in that described air inlet (12) and air outlet (11) along described housing (10) short transverse just to setting.

9. the electric heater according to any one in claim 1-4 is it is characterised in that described housing (10) includes base plate (13) and the cover body (14) that is arranged on described base plate (13), described oil Heater heater (20) is arranged on described base plate (13) On, described air inlet (12) is arranged on described base plate (13), and described air outlet (11) is arranged on the top of described cover body (14).

10. electric heater according to claim 9 is it is characterised in that described electric heater includes being arranged on described base plate (13) The roller (30) of downside.

11. electric heaters according to claim 9 are it is characterised in that described cover body is included along described oil Heater heater (20) length direction extends and is arranged on the side wall of described oil Heater heater (20) both sides, and at least one described side wall is relatively Slope inwardly in described base plate (13) and arrange.

12. electric heaters according to claim 11 are it is characterised in that described side wall includes the first side wall (14a) and second Side wall (14b), described the first side wall (14a) and second sidewall (14b) slope inwardly both with respect to described base plate (13) and arrange, institute The inclined degree stating the first side wall (14a) is more than the inclined degree of described second sidewall (14b), described the first side wall (14a) Outside is provided with dry in the sun portion (40).

13. electric heaters according to any one in claim 1-4 are it is characterised in that be provided with described shell (10) Assisted heating device.

14. electric heaters according to claim 13 are it is characterised in that described assisted heating device includes radiating aluminium sheet and peace It is loaded on the heat generating member of described radiating aluminium sheet.

15. electric heaters according to any one in claim 1-4 are it is characterised in that described oil Heater heater (20) Including the fin being filled with conduction oil and the heating member being arranged in described fin.