WO2018076543A1

WO2018076543A1 - Oil heater

Info

Publication number: WO2018076543A1
Application number: PCT/CN2016/113777
Authority: WO
Inventors: 岳宝; 王文鹏; 陈小潭; 周伟平; 杜文波
Original assignee: 广东美的环境电器制造有限公司; 美的集团股份有限公司
Priority date: 2016-10-28
Filing date: 2016-12-30
Publication date: 2018-05-03
Also published as: KR20190011315A; EP3460343A4; EP3460343A1; JP2019531451A

Abstract

An oil heater (100), comprising: two oil pipes (1) arranged at intervals vertically; and multiple cooling fins (2), both ends of the cooling fins (2) being provided on the two oil pipes (1), separately. An oil way channel in communication with the two oil pipes (1) is provided in each cooling fin (2). An air cavity (21) spaced apart from the oil way channel is provided on at least one side edge of each cooling fin (2). Each air cavity (21) is provided with a top air outlet (210). An air inlet (211) is provided on each side wall of opposite side walls of the air cavity (21) on a length direction parallel to the oil pipes (1). Each air inlet (211) is provided with an air guide plate (212) for introducing the air into the air cavity (21).

Description

Oil heater

Technical field

The invention relates to the technical field of living appliances, in particular to an oil heater.

Background technique

The current working principle of the oil heater is to use an electric heating rod to heat the heat transfer oil in the metal cavity, and then the high temperature heat transfer oil transfers heat to the ambient air through the metal cavity and the heat sink on the cavity to achieve the purpose of heating the user. . Generally, the higher the temperature of the metal cavity and the heat sink, the more favorable it is to dissipate heat to the ambient air.

In the related art, the edge of the heat sink of the oil heater generally leaves a very thin air chamber, and a through hole is designed at a certain distance on the air chamber, and the air enters the air chamber through the through hole, due to the air The thermal conductivity is much lower than that of metal (usually stainless steel), so the oil heater in the related art can achieve the purpose of isolating a part of the heat at the edge of the heat sink. However, the oil heaters rely solely on the air insulation design of the air chamber, and cannot sufficiently cool the edges of the heat sink, and there is a danger of burns during the use of the user.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, the present invention provides an oil heater, which can increase the heat dissipation area of the edge of the heat sink, increase the flow intensity of the air on the inner surface of the heat sink and the air on the outer surface, reduce the temperature of the edge of the heat sink, and enhance the heat dissipation of the heat sink. Ability to avoid the risk of burns during the use of the oil heater.

An oil heater according to an embodiment of the present invention includes: two oil pipes, the two oil pipes are spaced apart in an up-and-down direction; a plurality of heat sinks, two ends of each of the heat sinks are respectively disposed on the two In the oil pipe, each of the fins is provided with an oil passage communicating with the two oil pipes, and at least one side edge of each of the fins is provided with an air chamber spaced apart from the oil passage. Each of the air chambers is provided with a top air outlet, and each of the opposite side walls of the air chamber is provided with an air inlet in a direction parallel to the length of the oil pipe, each of the An air deflector for introducing air into the air chamber is provided at the air inlet.

An oil heater according to an embodiment of the present invention is provided with an air chamber having an air inlet and a top air outlet at an edge of the heat sink, and a wind deflector is disposed at the air inlet. Thereby increasing the heat dissipation area of the edge of the heat sink, increasing the flow intensity of the air on the inner surface of the heat sink and the air on the outer surface, reducing the temperature of the edge of the heat sink, enhancing the heat dissipation capability of the heat sink, and avoiding the user in the process of using the oil heater Risk of being burnt.

Preferably, the oil heater further comprises a bimetal temperature control element for detecting a temperature of the heat transfer oil, when the heat transfer oil Turn off the power when the temperature reaches the temperature set by the user.

According to some embodiments of the present invention, each of the opposite side walls of the air chamber is provided with a plurality of the air inlets spaced apart in the up and down direction.

Optionally, the free end of each of the air deflectors extends into the air chamber.

Optionally, the free end of each of the air deflectors is located outside of the air chamber.

Optionally, a free end of each of the air deflectors on one of the side walls of each of the air chambers projects into the air chamber, on the other side wall of each of the air chambers The free end of each of the air deflectors is located outside of the air chamber.

Specifically, a portion of the air deflector located on an outdoor side of the air chamber has an extension length that does not exceed 1/2 of a distance between two adjacent air chambers.

Further, a plurality of the air deflectors located on the same side wall are disposed in parallel.

Further, the angle between each of the air deflectors and the vertical plane ranges from 5° to 15°.

Optionally, a plurality of air inlets on opposite side walls of each of the air chambers are disposed one to one in a direction parallel to the length of the oil tube.

Optionally, the air inlets on opposite side walls of each of the air chambers are staggered in the up and down direction.

According to some embodiments of the invention, the air chambers are provided on both side edges of each of the fins.

DRAWINGS

1 is a front elevational view of an oil heater according to an embodiment of the present invention;

2 is a schematic cross-sectional view showing the structure of a heat sink according to an embodiment of the present invention;

3 is a schematic cross-sectional view showing the structure of a heat sink according to other embodiments of the present invention;

Figure 4 is a cross-sectional view, taken along line A-A, of the embodiment of the air chamber of the oil heater of Figure 1;

Figure 5 is a cross-sectional view, taken along line A-A, of another embodiment of the air chamber of the oil heater of Figure 1;

Figure 6 is a partial enlarged view of a portion A in Figure 2;

Figure 7 is a partial enlarged view of a portion B of Figure 3;

Figure 8 is a partial enlarged view of a portion C of Figure 4;

Figure 9 is a partial enlarged view of a portion D in Figure 5;

Fig. 10 is a graph showing a comparison of temperature distribution curves of fins and fins of the related art according to an embodiment of the present invention.

Reference mark:

Oil heater heater 100;

Oil pipe 1; heat sink 2; air chamber 21; top air outlet 210; air inlet 211;

Air deflector 212.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "length", "upper", "lower", "vertical", "horizontal", "top", "inside", "outside", etc. indicate the orientation or The positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the present invention and the simplified description, and is not intended to indicate or imply that the device or component referred to has a specific orientation, and is constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

An oil heater 100 according to an embodiment of the present invention will now be described with reference to Figs. The arrows in Figs. 2 to 5 refer to the flow direction of the cold air in the up and down direction.

As shown in FIGS. 1-9, an oil heater 100 according to an embodiment of the present invention includes two oil pipes 1 and a plurality of fins 2.

The two oil pipes 1 are spaced apart in the up and down direction. Two ends of each fin 2 are respectively disposed on two oil pipes 1, and each fin 2 is provided with an oil passage (not shown) communicating with the two oil pipes 1, that is, two oil pipes 1 The oil passages 20 of the plurality of fins 2 communicate to form an oil circulation circuit. At least one side edge of each fin 2 is provided with an air chamber 21 spaced apart from the oil passage, and each air chamber 21 is provided with a top air outlet 210, in the longitudinal direction parallel to the oil pipe 1, the air chamber Each of the opposite side walls of the 21 is provided with an air inlet 211, and each of the air inlets 211 is provided with a wind deflector 212 for introducing air into the air chamber 21.

It can be understood that the oil heater 100 further includes a heating rod disposed in the oil pipe 1 located below to heat the heat transfer oil in the oil pipe 1. Preferably, the oil heater 100 is equipped with a bimetal temperature control element, and when the temperature of the heat transfer oil reaches a temperature set by the user, the temperature control element automatically disconnects the power source. Thereby, the safety and reliability of the oil heater 100 is improved.

When the oil heater 100 is turned on, the heat transfer oil in the lower oil pipe 1 is heated by the heating rod, and then the high temperature heat transfer oil rises through the oil passage in the plurality of fins 2 to the oil pipe 1 located above. Forming oil circulation, oil The heater 100 radiates the heat of the heat transfer oil through the surfaces of the two oil pipes 1 and the peripheral wall of the heat sink 2, thereby heating the surrounding space environment, and the air-cooled heat transfer oil is lowered into the oil pipe 1 located below and heated by the heating rod. Start a new cycle.

The cold air outside the oil heater 100 enters the interior of the air chamber 21 through the air deflector 212 at the air inlet 211 of the air chamber 21, and flows out through the top air outlet 210, that is, the heat sink 2 An air flow passage is formed in the air chamber 21 at the edge, and the edge of the fin 2 is dissipated during the flow of the air, thereby lowering the temperature of the edge of the fin 2.

It should be noted that since each of the opposite side walls of the air chamber 21 is provided with an air inlet 211, the air chambers 21 on the same side of the adjacent two fins 2 are not in contact with each other. An air flow path is formed between the adjacent two fins 2. Thereby, the horizontal cold air outside the oil heater 100 is facilitated to enter the high temperature region of the oil passage portion between the adjacent fins 2 of the oil heater 100 through the air flow passage, and adjacent to the heat sink Circulating flow between 2 to exchange heat. Thereby, the contact between the cold air in the horizontal direction and the edge of the heat sink 2 is increased, the flow intensity of the air on the outer surface of the heat sink 2 and the heat dissipation effect on the edge of the heat sink 2 are improved, thereby lowering the temperature of the edge of the heat sink 2, and avoiding The user is in danger of being burnt during the use of the oil heater 100.

It is to be noted that, in the description of the present invention, the "high temperature zone" merely indicates that the temperature of the region of the heat sink 2 where the oil passage is disposed is higher than the temperature of the region of the heat sink 2 where the air chamber 21 is provided, and not Refers to the specific temperature value. The oil heater 100 according to an embodiment of the present invention is provided with an air chamber 21 at the edge of the heat sink 2, and the heat sink 2 of the oil heater 100 of the embodiment of the present invention is compared with the oil heater of the related art. The air gap of the edge is enlarged, so that the heat dissipation area at the edge of the heat sink 2 can be increased, the heat dissipation at the edge of the heat sink 2 is facilitated, and the temperature at the edge of the heat sink 2 is lowered.

The inventors have found through a large number of experiments that, as shown in FIG. 10, in the oil heater 100 of the present invention, increasing the arrangement of the air inlet 211 of the air deflector 212 is advantageous for lowering the temperature of the edge of the heat sink 2. Compared with the oil heater in the related art, the temperature of the edge of the fin 2 of the oil heater 100 of the present invention is lowered from the original temperature exceeding the standard to the safety requirement range, and the temperature drop range can be more than 20%, and the heat dissipation is performed. The overall heat dissipation power of the sheet 2 is slightly increased by 1%.

The oil heater 100 according to an embodiment of the present invention is provided with an air chamber 21 having an air inlet 211 and a top air outlet 210 at the edge of the heat sink 2, and a wind deflector 212 is disposed at the air inlet 211. Thereby, the heat dissipation area of the edge of the heat sink 2 is increased, the flow intensity of the air of the inner surface of the heat sink 2 and the air of the outer surface is increased, the temperature of the edge of the heat sink 2 is lowered, the heat dissipation capability of the heat sink 2 is enhanced, and the user is prevented from using the oil There is a risk of burns during the heater 100 process.

According to some embodiments of the present invention, each of the opposite side walls of the air chamber 21 is provided with a plurality of air inlets 211 spaced apart in the up and down direction. It can be seen that the interval distribution of the plurality of air inlets 211 in the up and down direction also causes the air deflectors 212 at the plurality of air inlets 211 to be spaced apart in the up and down direction so as to be on the same side wall of the air chamber 21. An air inlet 211 of a louver structure is formed. In the up and down direction, cold air outside the oil heater 100 is on the air deflector 212 The flow of the air is introduced into the interior of the air chamber 21 through the plurality of air inlets 211, so that the flow of the external cold air into the air chamber 21 can be increased, and the flow of the air on the inner surface of the heat sink 2 can be increased. The strength increases the cooling rate at the edge of the fin 2 . On the other hand, the plurality of air inlets 211 form a louver structure and have a turbulence function, which can cause air to be disturbed at the air inlet 211, destroying the air boundary layer at the air inlet 211, thereby improving the vicinity of the air inlet 211. The air convection heat exchange efficiency improves the heat dissipation capability of the heat sink 2, and at the same time helps to cool the edge of the heat sink 2. It can be understood that the wind deflector 212 also has a certain guiding effect on the cold air in the horizontal direction because the wind deflector 212 has a certain inclination in the up and down direction. It should be noted here that the horizontal direction refers to the direction perpendicular to the paper surface in FIGS. 2 to 5.

As shown in Figures 2 and 6, in accordance with some embodiments of the present invention, the free end of each air deflector 212 extends into the air chamber 21. Therefore, the air deflector 212 not only guides the cold air outside the air chamber 21, but also ensures that the user does not encounter sharp edges and corners, avoids the risk of the user being scratched, and improves the oil heater. 100 safety and reliability.

As shown in FIGS. 3 and 7, in accordance with further embodiments of the present invention, the free end of each air deflector 212 is located outside of the air chamber 21. Therefore, the flow guiding effect of the air deflector 212 on the external cold air can be further improved, the flow area of the cold air in the air chamber 21 can be ensured, and the flow area of the cold air in the air chamber 21 can be prevented from being reduced. The large resistance is increased, the flow intensity of the air on the inner surface of the air chamber 21 is increased, and the cooling speed of the edge of the heat sink 2 is increased.

The inventors have found through experiments that when the extension of the portion of the air deflector 212 outside the air chamber 21 does not exceed half the distance between the adjacent two air chambers 21, the air deflector 212 is at the air inlet 211. The effect of cold air disturbance is most obvious. Therefore, in some preferred examples of the present invention, the portion of the wind deflector 212 located outside the air chamber 21 does not extend more than half the distance between the adjacent two air chambers 21.

As shown in FIGS. 5 and 9, in accordance with still further embodiments of the present invention, the free end of each of the air deflectors 212 on one of the side walls of each of the air chambers 21 extends into the air chamber 21, each The free ends of each of the air deflectors 212 on the other side wall of the air chamber 21 are located outside the air chamber 21. Therefore, the flow guiding effect of the air deflector 212 on the outside air can be further improved, the air turbulence effect of the air deflector 212 on the air at the air inlet 211 can be increased, the air convection heat exchange efficiency near the air inlet 211 can be improved, and heat dissipation can be improved. The heat dissipation capability of the sheet 2 is advantageous for cooling the edges of the heat sink 2.

Further, a plurality of air deflectors 212 on the same side wall are disposed in parallel. It can be seen that the plurality of air deflectors 212 on the same side wall have the same angle with the vertical plane. Therefore, the structure of the oil heater 100 is simple and convenient to manufacture. At the same time, it can also ensure that the air damper 212 on the same side wall has the same turbulence effect on the air at the different air inlets 211, and the flow of cold air entering the air chamber 21 through the different air inlets 211 is the same, avoiding The cold air is subjected to a large resistance during the flow in the air chamber 21, thereby ensuring the flow intensity of the air on the inner surface of the air chamber 21, which is advantageous for cooling the edge of the fin 2. It should be noted here that the vertical direction refers to the up and down direction of the oil heater 100.

The inventors have found through experiments that when the angle between each of the wind deflectors 212 and the vertical plane is between 5° and 15°, the deflector 212 has the most significant effect on the external cold air. Therefore, in a preferred example of the invention, the angle between each of the wind deflectors 212 and the vertical plane ranges from 5° to 15°.

Alternatively, as shown in FIGS. 2 and 3, the plurality of intake ports 211 on the opposite side walls of each of the air chambers 21 are disposed one by one in a direction parallel to the longitudinal direction of the oil pipe 1. Therefore, the structure of the oil heater 100 is simple and convenient to manufacture.

Alternatively, as shown in FIGS. 4 and 5, the air inlets 211 on the opposite side walls of each of the air chambers 21 are alternately arranged in the up and down direction. It can be seen that the air inlets 211 of the louver structure on the opposite side walls of each air chamber 21 are asymmetrically distributed in the up and down direction, thereby preventing the cold air flowing in the air chamber 21 from entering the louver structure. At the port 211, a large resistance is obtained due to a decrease in the air flow area, which ensures the flow intensity of the air on the inner surface of the fin 2, which is advantageous for cooling the edge of the fin 2. It can be understood that the extending direction of the free end of the air deflector 212 on the opposite side walls of each air chamber 21 can be set according to actual conditions, for example, the wind deflector 212 on the opposite side walls of each air chamber 21 The free end can extend into the air chamber 21 at the same time or at the same time outside the air chamber 21. Or the free end of the air deflector 212 on one of the side walls of each air chamber 21 projects into the air chamber 21, and the free end of the air deflector 212 on the other side wall is located outside the air chamber 21. .

According to some embodiments of the invention, the air chambers 21 are provided on both side edges of each of the fins 2. Therefore, the heat dissipation area of the heat sink 2 can be further increased, and the heat dissipation capability of the heat sink 2 can be enhanced.

The structure of the oil heater 100 according to an embodiment of the present invention will be described in detail below with reference to Figs. 1, 5 and 9. It should be noted that the following description is merely exemplary, and it is obvious that those skilled in the art can combine or replace or modify some of the technical solutions or some technical features after reading the following technical solutions of the present invention. It falls within the scope of protection required by the present invention.

As shown in FIGS. 1, 5 and 9, an oil heater 100 according to an embodiment of the present invention includes two oil pipes 1 and a plurality of fins 2.

The two oil pipes 1 are spaced apart in the up and down direction. Two ends of each fin 2 are respectively disposed on two oil pipes 1, and each fin 2 is provided with an oil passage communicating with two oil pipes 1, and both sides of each fin 2 are provided with oil. The air passages 21 are spaced apart from each other.

Each of the air chambers 21 is provided with a top air outlet 210, and in each of the opposite side walls of the air chamber 21, seven of them are spaced apart in the up and down direction in the longitudinal direction parallel to the oil pipe 1. The gas port 211 is disposed, and the air inlets 211 on the opposite side walls are staggered in the up and down direction.

Each air inlet 211 is provided with a wind deflector 212, and each air deflector 212 has an angle of 10° with the vertical plane. The free end of each of the air deflectors 212 on one of the side walls of each of the air chambers 21 extends into the air chamber 21, and each of the air deflectors 212 on the other side wall of each of the air chambers 21 The free end of the air chamber 21 is located outside the air chamber 21, and the portion of the air deflector 212 located outside the air chamber 21 does not extend more than half the distance between the adjacent two air chambers 21.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

An oil heater, characterized in that it comprises:

Two oil pipes, the two oil pipes are spaced apart in the up and down direction;

a plurality of fins, two ends of each of the fins are respectively disposed on the two oil pipes, and each of the fins is provided with an oil passage communicating with the two oil pipes, each of the heat dissipation At least one side edge of the sheet is provided with an air chamber spaced apart from the oil passage, each of the air chambers being provided with a top air outlet, the air chamber being parallel to the length of the oil pipe Each of the opposite side walls is provided with an air inlet, and each of the air inlets is provided with a wind deflector for introducing air into the air chamber.
The oil heater according to claim 1, further comprising a bimetal temperature control element for detecting a temperature of the heat transfer oil, wherein the power source is turned off when the temperature of the heat transfer oil reaches a temperature set by a user.
The oil heater according to any one of claims 1 to 2, wherein each of the opposite side walls of the air chamber is provided with a plurality of spaced apart portions in the up and down direction. Said air inlet.
The oil heater according to claim 3, wherein a free end of each of said air deflectors projects into said air chamber.
The oil heater according to claim 3, wherein a free end of each of said air deflectors is located outside said air chamber.
The oil heater according to claim 3, wherein a free end of each of said air deflectors on one of said side walls of said air chamber projects into said air chamber, each The free ends of each of the air deflectors on the other side wall of the air chamber are located outside of the air chamber.
The oil heater according to any one of claims 4 to 5, wherein a portion of the wind deflector located on an outdoor side of the air chamber has an extension length not exceeding two adjacent air 1/2 of the chamber distance.
The oil heater according to claim 3, wherein a plurality of said air deflectors on the same side wall are disposed in parallel.
The oil heater according to claim 3, wherein an angle between each of the wind deflectors and the vertical plane ranges from 5° to 15°.
The oil heater according to any one of claims 3-9, wherein a plurality of air inlets on opposite side walls of each of said air chambers are parallel to a length of said oil pipe One by one set up.
The oil heater according to any one of claims 3 to 9, characterized in that the air inlets on the opposite side walls of each of the air chambers are staggered in the up and down direction.
The oil heater according to any one of claims 1 to 11, characterized in that the air chamber is provided at both side edges of each of the fins.