CN103388890A - Electric heating device and air conditioner - Google Patents
Electric heating device and air conditioner Download PDFInfo
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- CN103388890A CN103388890A CN2012101462189A CN201210146218A CN103388890A CN 103388890 A CN103388890 A CN 103388890A CN 2012101462189 A CN2012101462189 A CN 2012101462189A CN 201210146218 A CN201210146218 A CN 201210146218A CN 103388890 A CN103388890 A CN 103388890A
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Abstract
The invention provides an electric heating device. A radiating fin component comprises a flow-inlet surface adjacent to a connecting surface; and the flow-inlet surface of the radiating fin component is an inclined surface and is intersected with the central line of a heating pipe to form an inclined angle. The invention also provides an air conditioner. The electric heating device is positioned beside a bending position of an evaporator and is arranged in an air-inlet area of a ventilating device. Therefore, the structure of the radiating fin of the electric heating device is improved, the resistance of the electric heating device to air flow is reduced, the interference noise of the electric heating device to the air conditioner is reduced, meanwhile, rotary noise between a cross-flow blade of the ventilating device and the electric heating device is reduced, the total heating noise of the air conditioner is reduced by about 2dB (A), the noise performance of the air conditioner is improved, and the tone quality of the air conditioner during running is improved.
Description
Technical field
The present invention relates to the refrigeration and air-conditioning technical field, particularly relate to a kind of electric heater unit and air-conditioner.
Background technology
When heat pump air conditioner moves under heating condition, thereby by heat exchanger and extraneous heat exchange, reach purpose to the indoor environment heat supply, when outdoor temperature was low, the reduction of heat exchange efficiency of heat exchanger, had influence on the heating capacity of air conditioner room unit.Usually,, in order to improve the heating effect of air-conditioner when the low temperature, set up a kind of PTC electric heater unit in air-conditioner, because its side reaction coefficient is high, withstand voltage properties is high, and ageing-resistant performance is high, is widely used at present in the domestic air conditioning air conditioner indoor machine.Due to the narrow space that electric heater unit be used for to be installed in air-conditioned wind tunnel, electric heater unit causes air-flow velocity and temperature distributing disproportionation and produces noise as duct resistance parts.Specifically, as Fig. 2,3,4, existing electric heater unit 10 includes heat-generating pipe 101, cooling fin part 102 and stiffener 103, stiffener 103 is positioned at the outside of cooling fin part 102, the transverse shape of fin 102 is rectangle, and the indoor apparatus of air conditioner use is many folding evaporimeters 20, therefore cooling fin part 102 enter going out plane of flow and must having larger angle of plane of flow and many folding evaporimeters 20, the fin that is air-flow and electric heater unit exists the angle of attack that becomes a mandarin, cause gas-flow resistance to increase, the pneumatic noise that heat transfer effect is not good and generation is larger.What produce when the PTC electric heater unit is opened in addition heats noise, causes that air-conditioner noise under heating condition of electrified heating device is large and tonequality is poor.
That is to say, the heating capacity of heat pump air conditioner when outdoor temperature is low is not good, in order to improve the heating effect of air-conditioner when the low temperature, set up electric heater unit in air-conditioner, but the unlatching of electric heater unit can increase the noise that heats of air-conditioner, having affected the noiseproof feature of complete machine, is the key factor that reduces the air conditioner heat-production noise so improve heat radiating fin structure and the installation site of electric heater unit.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of electric heater unit, good effect of heat exchange, and the noise in the time of can reducing the air-conditioner operation, tonequality improves.
In addition, another technical problem to be solved by this invention is to provide a kind of air-conditioner, the good effect of heat exchange of its electric heater unit, and the reducing noise during operation, tonequality improves.
The present invention is achieved through the following technical solutions:
Electric heater unit, include heat-generating pipe and cooling fin part, and the medial surface of described cooling fin part is joint face, with the lateral wall of heat-generating pipe, is connected; Wherein, cooling fin part includes the enter stream interface adjacent with joint face; The stream interface that enters of cooling fin part is inclined-plane, with the crossing oblique angle that is of the center line of heat-generating pipe.
Further, the cross section of described electric heater unit is the flechette-type structure, that is: cooling fin part includes the first fin unit and the second fin unit, lays respectively at the both sides of heat-generating pipe; The cross section of described the first fin unit and the second fin unit is quadrangle, has the fillet that overlaps with the outer side edges in the cross section of heat-generating pipe, and the angle of become a mandarin limit and the heat-generating pipe adjacent with fillet is θ, and θ is less than 90 °.
Air-conditioner, include evaporimeter, ventilation unit and above-mentioned electric heater unit; Described evaporimeter is many folding evaporimeters, and described electric heater unit is positioned at the bending position side of evaporimeter; Described electric heater unit is arranged in ventilation unit air intake zone.
Beneficial effect of the present invention is as follows:
Electric heater unit of the present invention, because cooling fin part includes the enter stream interface adjacent with joint face; The stream interface that enters of cooling fin part is inclined-plane, with the crossing oblique angle that is of the center line of heat-generating pipe.Air-conditioner of the present invention, electric heater unit are positioned at the bending position side of evaporimeter; Described electric heater unit is arranged on ventilation unit air intake zone.Therefore, improved the heat radiating fin structure of electric heater unit, reduced the resistance of electric heater unit to air-flow, reduced its interference noise to air-conditioner, the through-flow fan blade of ventilation unit and the rotational noise between electric heater unit have been reduced simultaneously, air conditioner heat-production noise total value reduces 2dB (A) left and right, has improved the noiseproof feature of air-conditioner, and has improved the tonequality when air-conditioner moves.
Description of drawings
Fig. 1 is the overall structure schematic diagram of electric heater unit of the present invention;
Fig. 2 is the vertical section structure schematic diagram of the electric heater unit of prior art;
Fig. 3 is the cross-sectional configuration schematic diagram of the electric heater unit of prior art;
Fig. 4 is the installation site schematic diagram of prior art electric heater unit in air-conditioner;
Fig. 5 is the cross-sectional configuration schematic diagram of electric heater unit of the present invention;
Fig. 6 is the stiffener structural representation of electric heater unit of the present invention;
Fig. 7 is the installation site cross-sectional configuration schematic diagram of electric heater unit of the present invention in air-conditioner;
Fig. 8 is heat-generating pipe cross-sectional configuration schematic diagram of the present invention;
Fig. 9 is another kind of heat-generating pipe cross-sectional configuration schematic diagram of the present invention;
Figure 10 is the cross-sectional view of the another kind of embodiment of electric heater unit of the present invention.
Description of reference numerals:
10, electric heater unit, 20, evaporimeter, 101, heat-generating pipe, 102, cooling fin part, 103, stiffener, 104, support, 105, the insulation fixed mount, 106, thermal fuse-link, 107, temperature limiter, 108, high temperature wire.
The specific embodiment
In order to solve the problems of the prior art, the present invention proposes a kind of electric heater unit, as shown in Figure 5, include heat-generating pipe 101 and cooling fin part 102, the medial surface of described cooling fin part 102 is joint face, with the lateral wall of heat-generating pipe 101, is connected; Wherein, cooling fin part 102 includes the enter stream interface adjacent with joint face; The stream interface that enters of cooling fin part 102 is inclined-plane, with the crossing oblique angle that is of the center line of heat-generating pipe 101.
Further, the cross section of described electric heater unit is the flechette-type structure, that is: cooling fin part 102 includes the first fin unit and the second fin unit, lays respectively at the both sides of heat-generating pipe 101; The cross section of described the first fin unit and the second fin unit is quadrangle, has the fillet that is connected with the outer side edges in the cross section of heat-generating pipe 101, and the angle of become a mandarin limit and the heat-generating pipe adjacent with fillet is θ, and θ is less than 90 °.
Described heat-generating pipe 101 is the heating aluminum pipe.
As Fig. 7, four limits in the cross section of described the first fin unit are respectively become a mandarin limit C1, the first outer side edges E1 and first of the first fillet, first and go out to flow limit C2, first becomes a mandarin, and to go out to flow limit C2 adjacent with the first fillet respectively for limit C1 and first, and the first outer side edges E1 connects respectively the first limit C1 and first that becomes a mandarin and goes out to flow the outer end points of limit C2; Four limits in the cross section of described the second fin unit are respectively become a mandarin limit D1, the second outer side edges E2 and second of the second fillet, second and go out to flow limit D2, second becomes a mandarin, and to go out to flow limit D2 adjacent with the second fillet respectively for limit D1 and second, and the second outer side edges E2 connects respectively the second limit D1 and second that becomes a mandarin and goes out to flow the outer end points of limit D2.
The first angle theta 1 of center line that becomes a mandarin limit C1 and heating aluminum pipe, scope is 1≤85 ° of 5 °≤θ.
The second angle theta 2 of center line that becomes a mandarin limit D1 and heating aluminum pipe, scope is 2≤85 ° of 5 °≤θ.
First becomes a mandarin, and angle theta 3 scopes that limit C1 and first goes out to flow limit C2 are, 3≤60 ° of 0 °≤θ.
Second becomes a mandarin, and angle theta 4 scopes that limit D1 and second goes out to flow limit D2 are, 4≤60 ° of 0 °≤θ.
As shown in Figure 1, electric heater unit also comprises: be positioned at heat-generating pipe 101 and cooling fin part 102 left parts support 104, be positioned at insulation fixed mount 105 and the high temperature wire 108 of heat-generating pipe 101 and cooling fin part 102 right parts; High temperature wire 108 and heat-generating pipe 101 electrical connections.
Electric heater unit also comprises: be arranged on thermal fuse-link 106 and temperature limiter 107 in insulation fixed mount 105, thermal fuse-link 106 and temperature limiter 107 electrical connections are between high temperature wire 108 and heat-generating pipe 101.
As shown in Figure 6, the lateral surface of described cooling fin part 102 is provided with stiffener 103, is provided with a plurality of air vents on stiffener 103.
The present invention also proposes a kind of air-conditioner,, as Fig. 7, is the cross-sectional configuration schematic diagram of evaporimeter 20, ventilation unit 30 and electric heater unit 10, includes evaporimeter 20, ventilation unit 30 and above-mentioned electric heater unit 10; Described evaporimeter 20 is many folding evaporimeters, and described electric heater unit 10 is positioned at the bending position side of evaporimeter 20; Described electric heater unit 10 is arranged in ventilation unit 30 air intake zones.
For controlling interference noise, evaporimeter 20 need maintain a certain distance with electric heater unit 10, the first distance that becomes a mandarin limit C1 of the first inner side edge A of evaporimeter and electric heater unit 10 is L1, the second distance that becomes a mandarin limit D1 of the second inner side edge B of evaporimeter 20 and electric heater unit 10 is L2, and the ratio of L1 and L2 and through-flow fan blade exradius R is 0.05～0.4.
Simultaneously, for reducing the rotational noise between through-flow fan blade and electric heater unit, the first angle that goes out to flow between the tangent line that limit C2 and second goes out to flow limit D2 and through-flow fan blade cylindrical camber line the near distance spot need be as far as possible little, when the rotation of assurance through-flow fan blade is neighbouring by electric heater unit, the milder transition of air flow energy, cause rotational noise in order to avoid larger pressure fluctuation occurs.That is, the first angle that goes out to flow between the tangent line that limit C2 and second goes out to flow limit D2 and through-flow fan blade cylindrical camber line the near distance spot is 0 °～30 °.
Also need maintain a certain distance L3 between electric heater unit 10 and through-flow fan blade, distance L 3 between electric heater unit 10 and through-flow fan blade is not less than the minimum clearance between snail tongue and through-flow fan blade and spiral case and through-flow fan blade, makes electric heater unit not become main rotational noise source.
Embodiment one:
The embodiment accompanying drawings is as follows:
As shown in Figure 5, the fin cross-sectional design of electric heater unit becomes arrow type cross section, and wherein the fin cross section is to be the quadrangle of θ with heating aluminum pipe angle.
The first angle theta 1 of center line that becomes a mandarin limit C1 and heating aluminum pipe, θ 1 is 60 °.
The second angle theta 2 of center line that becomes a mandarin limit D1 and heating aluminum pipe, θ 2 is 60 °.
First becomes a mandarin, and angle theta 3 that limit C1 and first goes out to flow limit C2 is 10 °.
Second becomes a mandarin, and angle theta 4 that limit D1 and second goes out to flow limit D2 is 10 °.
As shown in Figure 7, fin first the become a mandarin angle of the second inner side edge B of limit D1 and hair device 20 of the angle and second of the first inner side edge A of limit C1 and evaporimeter that becomes a mandarin is 7 °, make the air-flow that is flowed out by evaporimeter with less angle of attack process electric heater unit, thereby reduce the resistance of electric heater unit to air-flow, reduce the interference noise of electric heater unit.Evaporimeter and electric heater unit maintain a certain distance, and the ratio of L1 and L2 and through-flow fan blade exradius R is 0.12.
simultaneously, for reducing the rotational noise between through-flow fan blade and electric heater unit, angle between the tangent line of the limit C2 of electric heater unit and limit D2 and its nearest through-flow fan blade cylindrical camber line is as far as possible little, near the milder transition of air flow energy when the rotation of assurance fan blade is by electric heater unit, cause rotational noise in order to avoid larger pressure fluctuation occurs, also need maintain a certain distance L3 between electric heater unit and through-flow fan blade, wherein L3 should be not less than the minimum clearance between indoor apparatus of air conditioner snail tongue and through-flow fan blade and spiral case and through-flow fan blade, make electric heater unit not become main rotational noise source.
The heat radiating fin structure of this electric heater unit has reduced the resistance of electric heater unit to air-flow, make electric heater unit heat exchange more fully, thereby reduced the interference noise of electric heater unit to air-flow under the heating condition, guaranteed that simultaneously the rotational noise between through-flow fan blade and electric heater unit is little, to complete machine to heat influence of noise less, improved the noiseproof feature that heats of air-conditioner.
electric heater unit structural change of the present invention the transverse shape of original electric heater unit, make rectangular cross section into the flechette-type cross section, wherein the fin cross section is the quadrangle that is with heating aluminum pipe angle, the limit C1 and D1 is designed to respectively to go out to flow limit A with evaporimeter and B has less angle of becoming a mandarin in fin cross section, thereby make air-flow without the angle of attack enter electric heater unit, reduce gas-flow resistance, and the less angle of maintenance between the tangent line of electrical heating limit C2 and limit D2 and its nearest through-flow fan blade cylindrical camber line, near the milder transition of air flow energy while making the fan blade rotation by electric heater unit, the relative installation of while optimal design electric heater unit and air-conditioner, improve the air conditioner heat-production noiseproof feature.
The heat radiating fin structure of this electric heater unit has reduced the resistance of electric heater unit to air-flow, make electric heater unit heat exchange more fully, thereby reduced the interference noise of electric heater unit to air-flow under the heating condition, guaranteed that simultaneously the rotational noise between through-flow fan blade and electric heater unit is little, to complete machine to heat influence of noise less, improved the noiseproof feature that heats of air-conditioner.
By experiment, obtain following result:
Air-conditioner is installed the experimental data contrast of two kinds of electric heater units
Therefore, the heat radiating fin structure of electric heater unit of the present invention, reduced the resistance of electric heater unit to air-flow, reduced its interference noise to air-conditioner, reduced simultaneously the rotational noise between through-flow fan blade and electric heater unit, air conditioner heat-production noise total value reduces 2dB (A) left and right, has improved the noiseproof feature of air-conditioner.
Embodiment two:
The present embodiment and embodiment one difference be, the first angle theta 1 that becomes a mandarin limit C1 and the center line of heating aluminum pipe, and θ 1 is 50 °.
The second angle theta 2 of center line that becomes a mandarin limit D1 and heating aluminum pipe, θ 2 is 70 °.
First becomes a mandarin, and angle theta 3 that limit C1 and first goes out to flow limit C2 is 8 °.
Second becomes a mandarin, and angle theta 4 that limit D1 and second goes out to flow limit D2 is 5 °.
As shown in Figure 7, fin first the become a mandarin angle of the second inner side edge B of limit D1 and hair device 20 of the angle and second of the first inner side edge A of limit C1 and evaporimeter that becomes a mandarin is 15 °, make the air-flow that is flowed out by evaporimeter with less angle of attack process electric heater unit, thereby reduce the resistance of electric heater unit to air-flow, reduce the interference noise of electric heater unit.Evaporimeter and electric heater unit maintain a certain distance, and the ratio of L1 and L2 and through-flow fan blade exradius R is 0.32.
As shown in Figure 8, Figure 9, male type or inner concave shape structure are adopted in the two ends of described heat-generating pipe 101.
As Figure 10, in order to increase radiating effect, electric heater unit includes heat-generating pipe 101 and cooling fin part 102, has cancelled the stiffener of the lateral surface of cooling fin part.
The above embodiment has only expressed several embodiment of the present invention, it describes comparatively concrete and detailed, therefore but can not be interpreted as the restriction to the scope of the claims of the present invention, electric heater unit heat radiating fin structure described in the invention and with the position relationship of air-conditioner, include but not limited to technical scheme described above.Should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (17)
1. electric heater unit, include heat-generating pipe and cooling fin part, and the medial surface of described cooling fin part is joint face, with the lateral wall of heat-generating pipe, is connected; It is characterized in that, cooling fin part includes the enter stream interface adjacent with joint face; The stream interface that enters of cooling fin part is inclined-plane, with the crossing oblique angle that is of the center line of heat-generating pipe.
2. electric heater unit according to claim 1, is characterized in that, the cross section of described electric heater unit is the flechette-type structure, that is: cooling fin part includes the first fin unit and the second fin unit, lays respectively at the both sides of heat-generating pipe; The cross section of described the first fin unit and the second fin unit is quadrangle, has the fillet that is connected with the outer side edges in the cross section of heat-generating pipe, and the angle of become a mandarin limit and the heat-generating pipe adjacent with fillet is θ, and θ is less than 90 °.
3. electric heater unit according to claim 1, is characterized in that, described heat-generating pipe is the heating aluminum pipe.
4. electric heater unit according to claim 2, it is characterized in that, four limits in the cross section of described the first fin unit are respectively become a mandarin limit C1, the first outer side edges E1 and first of the first fillet, first and go out to flow limit C2, first becomes a mandarin, and to go out to flow limit C2 adjacent with the first fillet respectively for limit C1 and first, and the first outer side edges E1 connects respectively the first limit C1 and first that becomes a mandarin and goes out to flow the outer end points of limit C2; Four limits in the cross section of described the second fin unit are respectively become a mandarin limit D1, the second outer side edges E2 and second of the second fillet, second and go out to flow limit D2, second becomes a mandarin, and to go out to flow limit D2 adjacent with the second fillet respectively for limit D1 and second, and the second outer side edges E2 connects respectively the second limit D1 and second that becomes a mandarin and goes out to flow the outer end points of limit D2.
5. electric heater unit according to claim 4, is characterized in that, the described first angle theta 1 of center line that becomes a mandarin limit C1 and heating aluminum pipe, and scope is 1≤85 ° of 5 °≤θ.
6. electric heater unit according to claim 4, is characterized in that, the described second angle theta 2 of center line that becomes a mandarin limit D1 and heating aluminum pipe, and scope is 2≤85 ° of 5 °≤θ.
7. electric heater unit according to claim 4, is characterized in that, described first becomes a mandarin, and angle theta 3 scopes that limit C1 and first goes out to flow limit C2 are, 3≤60 ° of 0 °≤θ.
8. electric heater unit according to claim 4, is characterized in that, described second becomes a mandarin, and angle theta 4 scopes that limit D1 and second goes out to flow limit D2 are, 4≤60 ° of 0 °≤θ.
9. electric heater unit according to claim 4, is characterized in that, also comprises: be positioned at heat-generating pipe and cooling fin part left part support, be positioned at insulation fixed mount and the high temperature wire of heat-generating pipe and cooling fin part right part; High temperature wire and heat-generating pipe electrical connection.
10. electric heater unit according to claim 9, is characterized in that, also comprises: be arranged on thermal fuse-link and temperature limiter in the insulation fixed mount, thermal fuse-link and temperature limiter electrical connection are between high temperature wire and heat-generating pipe.
11. electric heater unit according to claim 4, is characterized in that, the lateral surface of described cooling fin part is provided with stiffener, is provided with a plurality of air vents on stiffener.
12. air-conditioner, is characterized in that, includes evaporimeter, ventilation unit and electric heater unit as described in any one in claim 4 to 11; Described evaporimeter is many folding evaporimeters, and described electric heater unit is positioned at the bending position side of evaporimeter; Described electric heater unit is arranged in ventilation unit air intake zone.
13. air-conditioner according to claim 12, is characterized in that, described ventilation unit includes through-flow fan blade and spiral case, and the sidepiece of described spiral case is provided with the snail tongue.
14. air-conditioner according to claim 13, is characterized in that, described evaporimeter has the first inner side edge A, and the angular range of the first inner side edge A of become a mandarin limit C1 and the evaporimeter of the first fin unit is 0 °～50 °; Evaporimeter has the second inner side edge B, and the angular range of become a mandarin limit D1 and the evaporimeter 20 second inner side edge B of the second fin unit is 0 °～50 °.
15. air-conditioner according to claim 13, it is characterized in that, the first distance that becomes a mandarin limit C1 of the first inner side edge A of described evaporimeter and electric heater unit is L1, the second distance that becomes a mandarin limit D1 of the second inner side edge B of evaporimeter and electric heater unit is L2, and the ratio of L1 and L2 and through-flow fan blade exradius R is 0.05～0.4.
16. air-conditioner according to claim 13, is characterized in that, the described first angle that goes out to flow between the tangent line that limit C2 and second goes out to flow limit D2 and through-flow fan blade cylindrical camber line the near distance spot is 0 °～30 °.
17. air-conditioner according to claim 13, is characterized in that, the distance L 3 between described electric heater unit and through-flow fan blade is not less than the minimum clearance between snail tongue and through-flow fan blade and spiral case and through-flow fan blade.
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| CN201210146218.9A CN103388890B (en) | 2012-05-11 | 2012-05-11 | Electric heater unit and air-conditioner |
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| CN201210146218.9A CN103388890B (en) | 2012-05-11 | 2012-05-11 | Electric heater unit and air-conditioner |
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| CN103388890B CN103388890B (en) | 2016-12-14 |
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