Electric heater with flow diversion function and air conditioner indoor unit

Abstract

This invention belongs to the field of air conditioning and refrigeration technology, specifically relating to an electric heater with a flow-guiding function and an indoor air conditioning unit. In this invention, the bottom of the electric heating tube is lower than the bottom of the fins, and a flow-guiding inclined side is provided at the bottom of the fins, with the height of the inclined side near the electric heating tube being lower than the height away from the electric heating tube. This design allows condensate on the fins to be guided along the inclined side to the bottom of the electric heating tube. Then, the bottom of the electric heating tube is set at an incline relative to the horizontal plane; this design allows the condensate collected at the bottom of the electric heating tube to flow along the inclined direction of the bottom of the electric heating tube under the action of gravity and to flow out from the outlet. This invention, through the combined flow-guiding effect of the inclined side at the bottom of the fins and the inclined bottom of the electric heating tube, achieves the function of guiding condensate from the fins to the bottom of the electric heating tube, and then discharging it from the outlet at the bottom of the electric heating tube. This invention does not require additional components and has the advantages of simple structure and strong practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning and refrigeration, and in particular relates to an electric heater with a flow diversion function and an air conditioning indoor unit. Background Art

[0002] In order to meet the requirement of rapid heating when the air conditioner is in use, the existing air conditioner is generally equipped with an electric heater for auxiliary heating inside the air conditioner indoor unit. The electric heater includes an electric heating tube and fins. The fins are fixedly arranged on the outside of the electric heating tube. The fins have the function of increasing the heat dissipation area of ​​the electric heating tube and improving the heat exchange efficiency of the electric heating tube. However, since the distance between the evaporator and the electric heater inside the air conditioner indoor unit housing is relatively close, and the electric heater is located below the evaporator, the two overlap in the vertical direction. When there is condensed water on the evaporator, it will drip onto the electric heater and easily accumulate on the electric heater. If the condensed water is not discharged from the electric heater in time, a large number of bacteria will breed and affect the health of the user; if impurities are adsorbed on the condensed water, it will also affect the heating efficiency of the electric heater and increase the power consumption of the heating process of the air conditioner indoor unit. Summary of the invention

[0003] The technical problem to be solved by the present invention is: the present invention provides an electric heater with a diversion function which has a simple structure and can divert and discharge condensed water on the electric heater, and also provides an air conditioner indoor unit using the electric heater with a diversion function.

[0004] The technical solution adopted by the present invention to solve its technical problem is: the present invention provides an electric heater with a diversion function, including an electric heating tube and fins, the fins are fixedly arranged on the outer wall of the electric heating tube, and the bottom of the electric heating tube is inclined relative to the horizontal plane; the bottom of the electric heating tube is lower than the bottom of the fin, and a diversion bevel is arranged at the bottom of the fin, and the height of the diversion bevel close to the electric heating tube side is lower than the height away from the electric heating tube side.

[0005] Furthermore, the bottom of the electric heating tube is inclined with the left end being lower and the right end being higher, or with the left end being higher and the right end being lower.

[0006] Furthermore, the bottom of the electric heating tube is inclined with a high middle portion and low ends.

[0007] Furthermore, the bottom of the electric heating tube is in an inverted V shape.

[0008] Furthermore, the bottom ridges of the electric heating tube are chamfered.

[0009] The present invention also provides an air-conditioning indoor unit, including an air-conditioning indoor unit shell, an evaporator and a drainage structure, and also includes the electric heater with a flow diversion function as described above; the evaporator is located inside the air-conditioning indoor unit shell and is fixedly connected to the air-conditioning indoor unit shell; the electric heater with a flow diversion function is located inside the air-conditioning indoor unit shell and is fixedly connected to the air-conditioning indoor unit shell; the electric heater with a flow diversion function is located on the inner side of the evaporator; the drainage structure is fixedly arranged on the air-conditioning indoor unit shell, and the water outlet end at the bottom of the electric heating tube is connected to the drainage structure.

[0010] Furthermore: a left end mounting groove is arranged on the inner wall of the left end of the air conditioner indoor unit shell, and a right end mounting groove is arranged on the inner wall of the right end of the air conditioner indoor unit shell; the left end of the electric heating tube is installed in the left end mounting groove, and the right end of the electric heating tube is installed in the right end mounting groove.

[0011] Furthermore, when the bottom of the electric heating tube is in an inverted V shape, a left end water collecting tank is fixedly provided on the inner wall of the air-conditioning indoor unit casing at the left end of the electric heating tube; a right end water collecting tank is fixedly provided on the inner wall of the air-conditioning indoor unit casing at the right end of the electric heating tube; the left end water collecting tank and the right end water collecting tank are both connected to the drainage structure of the air-conditioning indoor unit; the upper ends of the left end water collecting tank and the right end water collecting tank are both open structures, the bottom of the left end of the electric heating tube is located above the left end water collecting tank, and the bottom of the right end of the electric heating tube is located above the right end water collecting tank.

[0012] Furthermore, the bottom of the fin located at the leftmost end of the electric heating tube is lower than the bottom of the electric heating tube and is tightly connected to the outer wall of the bottom of the electric heating tube; the bottom of the fin located at the rightmost end of the electric heating tube is lower than the bottom of the electric heating tube and is tightly connected to the outer wall of the bottom of the electric heating tube; the fin located at the leftmost end of the electric heating tube is located directly above the water collecting tank at the left end, and the fin located at the rightmost end of the electric heating tube is located directly above the water collecting tank at the right end.

[0013] Furthermore: a left end water stop baffle is fixedly provided on the outer wall of the left end of the electric heating tube, the bottom of the left end water stop baffle is lower than the bottom of the electric heating tube, and the bottom of the left end water stop baffle is tightly connected to the outer wall of the left end bottom of the electric heating tube; a right end water stop baffle is fixedly provided on the outer wall of the right end of the electric heating tube, the bottom of the right end water stop baffle is lower than the bottom of the electric heating tube, and the bottom of the right end water stop baffle is tightly connected to the outer wall of the right end bottom of the electric heating tube; the fin is located between the left end water stop baffle and the right end water stop baffle; the left end water stop baffle is located directly above the left end water collecting tank, and the right end water stop baffle is located directly above the right end water collecting tank.

[0014] The beneficial effects of the present invention are as follows: the present invention changes the structure of the electric heating tube and the fin so that the bottom of the electric heating tube is lower than the bottom of the fin, and a guide bevel is provided at the bottom of the fin, and the height of the guide bevel close to the electric heating tube is lower than the height away from the electric heating tube; such a design realizes the drainage of the condensed water on the fin to the bottom of the electric heating tube along the guide bevel. Then the bottom of the electric heating tube is set to be inclined relative to the horizontal plane; such a design realizes the function that the condensed water collected at the bottom of the electric heating tube flows along the inclined direction of the bottom of the electric heating tube under the action of gravity and flows out from the water outlet. The present invention realizes the function of guiding the condensed water from the fin to the bottom of the electric heating tube and then discharging it from the water outlet at the bottom of the electric heating tube through the joint diversion effect of the guide bevel at the bottom of the fin and the inclined setting of the bottom of the electric heating tube. The present invention does not require additional components and has the advantages of simple structure and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a first-person perspective schematic diagram of an electric heater with a diversion function installed behind an air conditioner indoor unit;

[0016] Figure 2 is a half-section view of an indoor unit of an air conditioner equipped with the electric heater with a flow guiding function of the first embodiment;

[0017] Figure 3 is a cross-sectional schematic diagram of an electric heater with a flow guiding function according to a first embodiment;

[0018] Figure 4 is a half-section view of an indoor unit of an air conditioner equipped with an electric heater having a flow guiding function according to a second embodiment of the present invention;

[0019] Figure 5 is a cross-sectional schematic diagram of an electric heater with a flow guiding function according to a second embodiment;

[0020] Figure 6 This is a second perspective schematic diagram of an electric heater with a diversion function installed behind an air conditioner indoor unit;

[0021] Figure 7 yes Figure 6 Explosion diagram of

[0022] Figure 8 It is a third-view schematic diagram of an electric heater with a diversion function installed behind an air conditioner indoor unit;

[0023] Fig. 9 yes Figure 8 Explosion diagram of

[0024] Fig.10 It is a schematic diagram of the structure of the fins located at the leftmost and rightmost ends of the electric heating tube.

[0025] Markings in the figure are: 1-electric heating tube, 2-fin, 3-air conditioner indoor unit housing, 4-evaporator, 5-left end water collecting tank, 6-right end water collecting tank, 7-left end mounting groove, 8-right end mounting groove, 9-guide bevel. DETAILED DESCRIPTION

[0026] The specific embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings, so as to have a further understanding of the concept of the present invention, the technical problems solved, the technical features constituting the technical solutions and the technical effects brought about. However, it should be noted that the description of these embodiments is illustrative and does not constitute a specific limitation of the present invention.

[0027] The present invention provides an electric heater with a flow guiding function, comprising an electric heating tube 1 and a fin 2, wherein the fin 2 is fixedly arranged on the outer wall of the electric heating tube 1; the bottom of the electric heating tube 1 is inclined relative to a horizontal plane; the bottom of the electric heating tube 1 is lower than the bottom of the fin 2, and a flow guiding bevel 9 is arranged at the bottom of the fin 2, and the height of the flow guiding bevel 9 close to the electric heating tube 1 is lower than the height away from the electric heating tube 1.

[0028] like Figure 3 As shown, a guiding bevel 9 is provided at the bottom of the fin 2, and the height of the guiding bevel 9 close to the electric heating tube 1 is lower than the height away from the electric heating tube 1. The guiding bevel 9 is provided to guide the condensed water on the fin 2 to the outer wall of the electric heating tube 1, and flow along the outer wall of the electric heating tube 1 to the bottom of the electric heating tube 1. The bottom of the electric heating tube 1 is inclined relative to the horizontal plane to guide the condensed water gathered at the bottom of the electric heating tube 1, so that the condensed water flows along the inclined direction of the bottom of the electric heating tube 1 and flows out from the water outlet. Specifically, in order to facilitate understanding of the flow process of water, the details are as follows: when there is condensed water on the fin 2, under the action of gravity, the water droplets will flow downward to the guide bevel 9. Since the height of the guide bevel 9 close to the electric heating tube 1 is lower than the height away from the electric heating tube 1, the water droplets will flow along the guide bevel 9 to the bottom of the electric heating tube 1. Further, since the bottom of the electric heating tube 1 is inclined with respect to the horizontal plane, under the action of gravity, the water droplets will flow out from the water outlet along the inclined direction of the bottom of the electric heating tube 1.

[0029] In the present invention, the shape of the guide bevel 9 is not limited, and it can be as follows Figure 3 The straight bevel shown can also be Figure 5 The curved bevel shown.

[0030] In the present invention, the tilted setting direction of the bottom of the electric heating tube 1 is not limited. The present invention provides three embodiments of the tilted setting of the bottom of the electric heating tube 1. In the first embodiment, the bottom of the electric heating tube 1 is tilted with the left end lower and the right end higher, that is, the height of the bottom of the electric heating tube 1 increases from left to right. In this embodiment, the condensed water flows out from the bottom of the left end of the electric heating tube 1.

[0031] In the second embodiment, the bottom of the electric heating tube 1 is inclined with the left end higher and the right end lower, that is, the height of the bottom of the electric heating tube 1 decreases from left to right. In this embodiment, condensed water flows out from the bottom of the right end of the electric heating tube 1.

[0032] In the third embodiment, the bottom of the electric heating tube 1 is high in the middle and inclined at both ends, that is, the bottom of the left half of the electric heating tube 1 rises from left to right; the bottom of the right half decreases from left to right. In this embodiment, condensed water flows out from the bottom of the left end and the bottom of the right end of the electric heating tube 1 at the same time.

[0033] The third embodiment is superior to the first and second embodiments. The third embodiment not only has the advantages of diverting water at both ends at the same time, a shorter movement path of condensed water along the bottom of the electric heating tube 1, and a faster diversion rate, but also has the advantages of less condensed water accumulation on one side and less risk of condensed water dripping when flowing to the left and right water outlets.

[0034] It should be understood by those skilled in the art that the bottom of the electric heating tube 1 can be inclined in an arc shape or in a straight line shape. Figure 1 As shown, in the embodiment of the present invention, the bottom of the electric heating tube 1 is inclined in a straight line. Compared with the straight line inclination, the arc-shaped inclination of the bottom of the electric heating tube 1 will increase the flow distance of the condensed water, affect the flow rate, and increase the risk of condensed water dripping along the bottom of the electric heating tube 1. Figure 1 As shown, the bottom of the electric heating tube 1 is preferably in an inverted V shape. The inverted V-shaped structure has the advantages of diverting water on both sides at the same time, fast diversion rate, and not easy to drip in the middle of diversion, compared with the above-mentioned inclination of the bottom of the left end and the high right end or the inclination of the left end and the bottom right end; compared with the arc-shaped inclination of the bottom of the electric heating tube 1, it has the advantage of a short distance for the condensed water to flow, and is the best implementation method.

[0035] Furthermore, in order to make the condensed water flow smoothly from the guiding bevel 9 to the bottom of the electric heating tube 1, the convex edges at the bottom of the electric heating tube 1 are chamfered, such as Figure 3 shown.

[0036] The present invention does not limit the type of the electric heating tube 1. The electric heating tube 1 can be Figure 3 The rectangular electric heating tube shown can also be Figure 5 The double electric heating tubes shown can also be of other types.

[0037] The present invention also provides an air conditioner indoor unit, such as Figure 2As shown, it includes an air-conditioning indoor unit casing 3, an evaporator 4 and a drainage structure, and also includes the electric heater with a diversion function as described above; the evaporator 4 is located inside the air-conditioning indoor unit casing 3 and is fixedly connected to the air-conditioning indoor unit casing 3; the electric heater with a diversion function is located inside the air-conditioning indoor unit casing 3 and is fixedly connected to the air-conditioning indoor unit casing 3; the electric heater with a diversion function is located on the inner side of the evaporator 4; the drainage structure is fixedly arranged on the air-conditioning indoor unit casing 3, and the water outlet end at the bottom of the electric heating tube 1 is connected to the drainage structure.

[0038] The above-mentioned water outlet end means that when the bottom of the electric heating tube 1 is inclined with the left end lower and the right end higher, the left end of the electric heating tube 1 is the water outlet end; when the bottom of the electric heating tube 1 is inclined with the left end higher and the right end lower, the right end of the electric heating tube 1 is the water outlet end; when the bottom of the electric heating tube 1 is inclined with the middle higher and the two ends lower, the left and right ends of the electric heating tube 1 are both water outlet ends.

[0039] When the condensed water on the evaporator 4 drops onto the electric heater with a diversion function, the condensed water will automatically flow to the water outlet at the bottom of the electric heating tube 1 through the joint diversion effect of the diversion bevel 9 at the bottom of the fin 2 and the bottom of the electric heating tube 1, and then flow into the drainage structure of the air-conditioning cabinet and be discharged through the drainage structure.

[0040] The present invention does not limit the way in which the electric heater with a flow-guiding function is fixedly connected to the air conditioner indoor unit housing 3, which may be a snap connection, a screw connection, etc. The location of the connection is also not limited, and may be set in the middle or at both ends of the electric heating tube 1. In the embodiment of the present invention, Figure 6 , 9 As shown, preferably, a left-end mounting groove 7 is provided on the inner wall of the left end of the air-conditioning indoor unit casing 3, and a right-end mounting groove 8 is provided on the inner wall of the right end of the air-conditioning indoor unit casing 3; the left end of the electric heating tube 1 is installed in the left-end mounting groove 7, and the right end of the electric heating tube 1 is installed in the right-end mounting groove 8.

[0041] As a preferred embodiment of the air conditioner indoor unit, Figure 1 , 6 As shown in Figures 1 and 8, the bottom of the electric heating tube 1 is in an inverted V shape, and a left-end water collecting tank 5 is fixedly provided on the inner wall of the air-conditioning indoor unit casing 3 at the left end of the electric heating tube 1; a right-end water collecting tank 6 is fixedly provided on the inner wall of the air-conditioning indoor unit casing 3 at the right end of the electric heating tube 1; the left-end water collecting tank 5 and the right-end water collecting tank 6 are both connected to the drainage structure of the air-conditioning indoor unit; the upper ends of the left-end water collecting tank 5 and the right-end water collecting tank 6 are both open structures, the bottom of the left end of the electric heating tube 1 is located above the left-end water collecting tank 5, and the bottom of the right end of the electric heating tube 1 is located above the right-end water collecting tank 6.

[0042] The bottom of the electric heating pipe 1 is in an inverted V shape, and the condensed water on the left side of the electric heater flows out from the bottom of the left end of the electric heating pipe 1, and then flows into the left end water collection tank 5; the condensed water on the right side of the electric heater flows out from the bottom of the right end of the electric heating water pipe 1, and then flows into the right end water collection tank 6. The left end water collection tank 5 and the right end water collection tank 6 are both connected to the drainage structure of the air conditioner indoor unit, thereby realizing the discharge of condensed water.

[0043] Furthermore, in order to facilitate the condensed water at the bottom of the electric heating tube 1 to flow smoothly into the left end water collecting tank 5 and the right end water collecting tank 6, the present invention also provides two diversion structures that can divert water flow into the left end water collecting tank 5 and the right end water collecting tank 6.

[0044] The first structure is: Fig.10 As shown, the bottom of the fin 2 at the far left end of the electric heating tube 1 is lower than the bottom of the electric heating tube 1 and is tightly connected to the outer wall of the bottom of the electric heating tube 1; the bottom of the fin 2 at the far right end of the electric heating tube 1 is lower than the bottom of the electric heating tube 1 and is tightly connected to the outer wall of the bottom of the electric heating tube 1; the fin 2 at the far left end of the electric heating tube 1 is directly above the left end water collection tank 5, and the fin 2 at the far right end of the electric heating tube 1 is directly above the right end water collection tank 6. Since the bottom of the fin 2 at the far left end is lower than the bottom of the electric heating tube 1 and is tightly connected to the outer wall of the bottom of the electric heating tube 1; when the condensed water flows to the far left end fin 2, it will be intercepted and cannot continue to flow along the bottom of the electric heating tube 1, and then flow into the left end water collection tank 5 along the far left end fin 2 under the action of gravity. The principle of the fin 2 at the far right end is the same as that of the fin 2 at the far left end, which will not be repeated here.

[0045] The second structure is: a left end water stop baffle is fixedly provided on the outer wall of the left end of the electric heating tube 1, the bottom of the left end water stop baffle is lower than the bottom of the electric heating tube 1, and the bottom of the left end water stop baffle is tightly connected to the outer wall of the left end bottom of the electric heating tube 1; a right end water stop baffle is fixedly provided on the outer wall of the right end of the electric heating tube 1, the bottom of the right end water stop baffle is lower than the bottom of the electric heating tube 1, and the bottom of the right end water stop baffle is tightly connected to the outer wall of the right end bottom of the electric heating tube 1; the fin 2 is located between the left end water stop baffle and the right end water stop baffle; the left end water stop baffle is located directly above the left end water collecting tank 5, and the right end water stop baffle is located directly above the right end water collecting tank 6. The left end water stop baffle has the same function and principle as the leftmost fin 2 in the first structure; since the bottom of the left end water stop baffle is lower than the bottom of the electric heating tube 1, and the bottom of the left end water stop baffle is tightly connected to the outer wall of the left end bottom of the electric heating tube 1, when the condensed water at the bottom of the electric heating tube 1 flows to the left end water stop baffle, the water flow will be intercepted by the left end water stop baffle and cannot continue to flow along the bottom of the electric heating tube 1, and then flow into the left end water collection tank 5 along the left end water stop baffle under the action of gravity. The right end water stop baffle has the same principle as the left end water stop baffle, which will not be repeated here.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric heater with a flow-guiding function, comprising an electric heating tube (1) and a fin (2), wherein the fin (2) is fixedly arranged on the outer wall of the electric heating tube (1), and is characterized in that: The bottom of the electric heating tube (1) is arranged at an inclination relative to a horizontal plane; the bottom of the electric heating tube (1) is lower than the bottom of the fin (2); a flow guiding bevel (9) is arranged at the bottom of the fin (2); the height of the flow guiding bevel (9) close to the electric heating tube (1) is lower than the height of the side away from the electric heating tube (1); The bottom of the electric heating tube (1) is inclined with the left end being lower and the right end being higher, or with the left end being higher and the right end being lower, or with the middle being higher and the two ends being lower; the convex edges of the bottom of the electric heating tube (1) are chamfered.

2. The electric heater with flow-conducting function according to claim 1, characterized in that: The bottom of the electric heating tube (1) is high in the middle and low at both ends, and is inclined; the bottom of the electric heating tube (1) is in an inverted V shape.

3. An air conditioner indoor unit, comprising an air conditioner indoor unit housing (3), an evaporator (4) and a drainage structure, characterized in that: It also includes the electric heater with a flow guiding function as claimed in claim 1 or 2; the evaporator (4) is located inside the air-conditioning indoor unit housing (3) and is fixedly connected to the air-conditioning indoor unit housing (3); the electric heater with a flow guiding function is located inside the air-conditioning indoor unit housing (3) and is fixedly connected to the air-conditioning indoor unit housing (3); the electric heater with a flow guiding function is located on the inner side of the evaporator (4); the drainage structure is fixedly arranged on the air-conditioning indoor unit housing (3), and the water outlet end at the bottom of the electric heating pipe (1) is connected to the drainage structure.

4. The air conditioner indoor unit according to claim 3, characterized in that: A left-end mounting groove (7) is provided on the inner wall of the left end of the air-conditioning indoor unit housing (3), and a right-end mounting groove (8) is provided on the inner wall of the right end of the air-conditioning indoor unit housing (3); the left end of the electric heating tube (1) is mounted in the left-end mounting groove (7), and the right end of the electric heating tube (1) is mounted in the right-end mounting groove (8).

5. The air conditioner indoor unit according to claim 3, characterized in that: When the bottom of the electric heating tube (1) is in an inverted V shape, a left-end water collecting trough (5) is fixedly arranged on the inner side wall of the air-conditioning indoor unit housing (3) at the left end of the electric heating tube (1); a right-end water collecting trough (6) is fixedly arranged on the inner side wall of the air-conditioning indoor unit housing (3) at the right end of the electric heating tube (1); the left-end water collecting trough (5) and the right-end water collecting trough (6) are both connected to the drainage structure of the air-conditioning indoor unit; the upper ends of the left-end water collecting trough (5) and the right-end water collecting trough (6) are both open structures, the bottom of the left end of the electric heating tube (1) is located above the left-end water collecting trough (5), and the bottom of the right end of the electric heating tube (1) is located above the right-end water collecting trough (6).

6. The air conditioner indoor unit according to claim 5, characterized in that: The bottom of the fin (2) located at the leftmost end of the electric heating tube (1) is lower than the bottom of the electric heating tube (1) and is tightly connected to the outer wall of the bottom of the electric heating tube (1); the bottom of the fin (2) located at the rightmost end of the electric heating tube (1) is lower than the bottom of the electric heating tube (1) and is tightly connected to the outer wall of the bottom of the electric heating tube (1); the fin (2) located at the leftmost end of the electric heating tube (1) is located directly above the water collecting tank (5) at the left end, and the fin (2) located at the rightmost end of the electric heating tube (1) is located directly above the water collecting tank (6) at the right end.

7. The air conditioner indoor unit according to claim 5, characterized in that: A left end water stop baffle is fixedly arranged on the outer wall of the left end of the electric heating tube (1), the bottom of the left end water stop baffle is lower than the bottom of the electric heating tube (1), and the bottom of the left end water stop baffle is tightly connected to the outer wall of the left end bottom of the electric heating tube (1); a right end water stop baffle is fixedly arranged on the outer wall of the right end of the electric heating tube (1), the bottom of the right end water stop baffle is lower than the bottom of the electric heating tube (1), and the bottom of the right end water stop baffle is tightly connected to the outer wall of the right end bottom of the electric heating tube (1); the fin (2) is located between the left end water stop baffle and the right end water stop baffle; the left end water stop baffle is located directly above the left end water collecting tank (5), and the right end water stop baffle is located directly above the right end water collecting tank (6).

Images