CN107477679A - A kind of indoor apparatus of air conditioner and air conditioner - Google Patents

Abstract

The present invention provides a kind of indoor apparatus of air conditioner and air conditioner, including evaporator and auxiliary heater, evaporator includes segmental arc, segmental arc is included therein on heart line, first end positioned at circumferential one end and the second end positioned at the circumferential other end, the tangent line of tangent line and process second end by the first end intersects at intersection point a and sandwiched forms angle C2, auxiliary heater includes the first auxiliary heater and the second auxiliary heater, on the cross section of the evaporator, described first, second auxiliary heater has geometric center respectively, two centers are connected to form two lines between intersection point respectively, if center angle C1 is formed between two lines, and have and meet following relationship between C1 and C2：C1/C2=0.17~0.45.By the present invention auxiliary heater can be made to be arranged on the appropriate position in evaporator air flow downstream, so as to farthest reduce the wind noise of indoor set and air-flow flow noise, improve the runnability of indoor apparatus of air conditioner or even air conditioner.

Description

Air conditioner indoor unit and air conditioner

technical field

The invention belongs to the technical field of air conditioners, and in particular relates to an air conditioner indoor unit and an air conditioner.

Background technique

At present, in order to heat the indoor unit in the existing air-conditioning indoor unit, an auxiliary heating device is used to auxiliary heat the indoor air in consideration of insufficient heating efficiency, so as to improve the indoor heating effect. However, due to the installation of the auxiliary heating device, the air intake airflow of the indoor unit will cause resistance and change the flow direction, which will cause airflow noise and reduce the sound quality of the whole machine, resulting in frequent noise, The sound quality of the air conditioner is poor, which affects the comfort of the indoor environment.

Because the air-conditioning indoor unit in the prior art has technical problems such as high noise and poor sound quality of the air conditioner due to the setting of the auxiliary heating device, the present invention researches and designs an air-conditioning indoor unit and an air conditioner.

Contents of the invention

Therefore, the technical problem to be solved by the present invention is to overcome the defect that the air-conditioning indoor unit in the prior art has relatively high noise due to the installation of the auxiliary heating device, so as to provide an air-conditioning indoor unit and an air conditioner.

The invention provides an air conditioner indoor unit, which includes an evaporator and an auxiliary heater, the cross section of the evaporator includes an arc section,

The arc segment includes, on its center line, a first end located at one circumferential end and a second end located at the other circumferential end, a tangent passing through the first end and a tangent passing through the second end intersect at an intersection point a and sandwiched to form an angle C2,

The auxiliary heater includes a first auxiliary heater and a second auxiliary heater, and on the cross section of the evaporator, the first auxiliary heater has a first geometric center, the second auxiliary heater There is a second geometric center, the first geometric center is connected to the intersection point to form a first connection line, and the second geometric center is connected to the intersection point a to form a second connection line, the first A central angle C1 is formed between the connecting line and the second connecting line, and the following relationship is satisfied between C1 and C2: C1/C2=0.17˜0.45.

Preferably, the value range of the angle C2 is 32.4°-42.4°.

Preferably, the central angle C1 ranges from 8.0° to 14.0°.

Preferably, the center o of the arc segment and the arc segment enclose a fan-shaped area, and the first auxiliary heater and the second auxiliary heater are both arranged in the fan-shaped area.

Preferably, the cross section of the evaporator further includes a first straight section and a second straight section, one end of the arc section is connected to the first straight section through a first end, and the other end is connected to the first straight section through a second end. the second straight paragraph;

The first straight section includes a long side and a short side, and a first centerline parallel to the long side, the first centerline is tangent to the centerline of the arc section at the first end; The two straight sections also include a long side and a short side, and a second centerline parallel to the long side, the second centerline is tangent to the centerline of the arcuate section at the second end.

Preferably, the angle C2 is an acute angle formed by the intersection of the extension line of the first midline of the first straight section and the extension line of the second midline of the second straight section.

Preferably, the value range of the angle C2 is 35.40°-39.40°.

Preferably, the long side length L1 of the first straight section ranges from 115 to 135 mm; and/or, the long side length L2 of the second straight section ranges from 80 to 100 mm.

Preferably, the auxiliary heater is an electric heater.

The present invention also provides an air conditioner: it comprises the aforementioned air conditioner indoor unit.

An air conditioner indoor unit and an air conditioner provided by the present invention have the following beneficial effects:

In the air-conditioning indoor unit and the air conditioner of the present invention, the center included angle C1 and the angle C2 of the arc section formed between the intersection point forming the angle and the geometric center line of the two auxiliary heaters, and the center included angle C1 and the angle C2 satisfy The relationship of C1/C2=0.17～0.45 enables the auxiliary heater to be installed at an appropriate position downstream of the airflow of the evaporator, thereby minimizing the air outlet noise and air flow noise of the indoor unit, and improving the performance of the air conditioner indoor unit. and even the performance of the air conditioner.

Description of drawings

Fig. 1 is a schematic diagram of the internal sectional structure of the air conditioner indoor unit of the present invention;

Fig. 2 is a schematic structural diagram of the cooperation of the evaporator and the auxiliary heater in the air-conditioning indoor unit of the present invention;

Fig. 3 is a schematic internal sectional view of a section along the horizontal direction in Fig. 2;

Fig. 4 is a simplified schematic diagram of Fig. 3 including only the evaporator and the auxiliary heater.

The reference signs in the figure represent:

1. Air intake panel; 2. Evaporator; 21. First straight section; 210. First centerline; 22. Second straight section; 220. Second centerline; 23. Arc section; 230. Centerline; 231. 232, the second end; 3, the cross-flow fan blade; 4, the volute tongue; 5, the air duct; 6, the auxiliary heater; 61, the first auxiliary heater; 62, the second auxiliary heater.

detailed description

As shown in Figures 1-3, the present invention provides an air conditioner indoor unit, including an evaporator 2 and an auxiliary heater 6, the cross section of the evaporator 2 includes a curved arc section 23,

The arc segment 23 includes a first end 231 located at one end of the circumferential direction and a second end 232 located at the other end of the circumferential direction on its central line 230, passing through the tangent of the first end 231 and passing through the second end. The tangent of the end 232 intersects at the intersection point a and is sandwiched to form an angle C2 (the center line is an arc that is concentric with the radial inner side and the radial outer side of the arc segment, and the radius of the center line =(radius of the radially outer side+radius of the radially inner side)/2, along the radial direction, the distance from a point on the center line to the radially outer side of the arc segment and to the radially inner side of the arc segment sides are equally spaced),

The auxiliary heater 6 includes a first auxiliary heater 61 and a second auxiliary heater 62. On the cross section of the evaporator 2, the first auxiliary heater 61 has a first geometric center, the second auxiliary heater 62 The auxiliary heater 62 has a second geometric center, the first geometric center is connected to the intersection point a to form a first connection line, and the second geometric center is connected to the intersection point to form a second connection line. A central angle C1 is formed between the first connecting line and the second connecting line, and the relationship between C1 and C2 satisfies the following relationship: C1/C2=0.17˜0.45.

Through the center angle C1 and the angle C2 of the arc segment formed between the intersection point a and the geometric centers of the two auxiliary heaters respectively, and the angle C1 and the angle C2 satisfy the relationship of C1/C2=0.17～0.45, Among them, C1/C2<1 means that the two auxiliary heaters are located inside the arc section of the evaporator, and C1/C2=0.17～0.45 means that the two auxiliary heaters are relative to the arc sections on both sides. Closer to each other, that is, the first auxiliary heater and the second auxiliary heater are very close together, that is, the distance between the two is relatively small, so that the flow of air flow through the gap between the two is relatively small , which effectively reduces the air flow noise and damping noise caused by back and forth collisions when the air flow passes through the gap between the two auxiliary heaters. On the other hand, C1/C2 cannot be made too small or even close to zero, so that It is impossible to make the opposite sides of the two auxiliary heaters play the role of heating, and if the distance is too small, the air flow will generate a particularly large flow resistance when passing through it, resulting in backflow and noise. Therefore, the auxiliary heater can be used It is arranged at an appropriate position downstream of the air flow of the evaporator, so as to minimize the air outlet noise and air flow noise of the indoor unit, and improve the operating performance of the air conditioner indoor unit and even the air conditioner.

The purpose of the present invention is to study the relationship between an evaporator and electric auxiliary heat, so as to reduce the noise of the air conditioner and improve the user comfort.

The present invention relates to an air conditioner, comprising an evaporator 2, a cross-flow vane 3, an air duct 5, and a volute tongue 4. The air duct 5 is located between the evaporator 2 and the cross-flow vane 3, as shown in FIG. 1 . The wind enters from the air inlet panel 1, passes through the cross-flow fan blades 3, and comes out from the air outlet of the air duct 5. There is a certain loss between the air inlet and outlet. The present invention achieves the purpose of reducing the noise of the air conditioner and improving the comfort of the user by adjusting the relationship between the evaporator and the electric auxiliary heat when the air inlet and outlet are constant.

In Figure 3-4, the evaporator is composed of two straight sections and an arc section. The diameter of the center line of the arc section is D, and the diameter of the arc section is related to the angle C2 of the evaporator. When the center of the circle is fixed , the larger the angle C2 is, the larger the diameter is. The angle C2 of the evaporator refers to the acute angle between the two straight sections of the evaporator, ranging from 32.4° to 42.4°;

The included angle C1 of the electric auxiliary heating center refers to the included angle between the two electric auxiliary heating geometric centers and the intersection point a of the evaporator respectively, and the range is 8.0°～14.0°;

In the case of a certain amount of air inlet and outlet, a reasonable selection of the installation angle and position of the electric auxiliary heating and the diameter of the arc section of the evaporator can reduce the wind resistance, reduce the noise of the air conditioner, and improve the sound quality of the air conditioner. Experimental verification shows that choosing the relationship between the evaporator and electric auxiliary heating within the above range can greatly improve the noise of the air conditioner and ensure the improvement of the sound quality of the air conditioner.

Preferably, the value range of the angle C2 is 32.4°-42.4°. This is the preferred value range of the arc section angle C2 in the evaporator of the present invention. When the length of the evaporator (the length refers to the length of the evaporator as shown in Figure 2) is certain, the size of the evaporator is selected in the above range , the experiment shows that this choice is easy to shape, and the evaporation area is larger, and the air conditioning performance is better. The noise of the air conditioner is greatly improved to ensure that the sound quality of the air conditioner is improved, but the air volume is not reduced.

Preferably, the central angle C1 ranges from 8.0° to 14.0°. This is the preferred value range of the angle between the intersection point a of the arc segment in the evaporator of the present invention and the line between the geometric centers of the two auxiliary heaters, so that the two heaters can be guaranteed to be located in the arc of the evaporator. Appropriate position in the area enclosed by the two segments, especially the distance between the two themselves should not be too far, effectively avoiding the excessive distance between the two and causing back and forth collisions when the airflow flows through the gap between the two auxiliary heaters The air flow noise and damping noise are generated, so that the heating efficiency is ensured while the noise is reduced to the greatest extent, and the comfort level required by the user is improved.

Preferably, the center o of the arc section 23 and the arc section enclose a fan-shaped area, and the first auxiliary heater 61 and the second auxiliary heater 62 are both arranged in the fan-shaped area. In this way, the airflow after the heat exchange of the bent arc section evaporator can be heated by the auxiliary heater, thereby improving the heating efficiency and preventing the situation that there is little or no airflow.

Preferably, both the first auxiliary heater and the second auxiliary heater are regular-shaped structures, and both the first and second auxiliary heaters are preferably rectangular parallelepiped structures as shown in Figures 1-3. The cross-sectional shape is rectangular. On the cross-section of the evaporator 2, the geometric center of the first auxiliary heater is located at the geometric center of the rectangle as shown in the figure, and the geometric center of the second auxiliary heater is located at the geometric center of the rectangle as shown in the figure. The geometric center of the rectangle.

In Figure 3, the evaporator is composed of two straight sections and an arc section. The centerline diameter of the arc section is D, and the diameter of the arc section is related to the angle C2 of the evaporator. When the center of the circle is fixed, the angle The larger the C2, the larger the diameter, ranging from 139 to 149mm.

Preferably, the evaporator 2 further includes a first straight section 21 and a second straight section 22, the arc section 23 is connected to the first straight section 21 through a first end 231, and connected to the first straight section 23 through a second end 232. said second straight section 22;

The first straight section 21 includes a long side and a short side, and a first centerline 210 parallel to the long side, the first centerline 210 and the centerline 230 of the arc section 23 are at the first end 231 Tangent (the first centerline 210 refers to the centerline between the two long sides of the first straight section 21, that is, the distance between the centerline and the two long sides is equal, as shown in Figure 4); the second straight section 22 Also comprise long side and short side, and the second center line 220 parallel with long side, described second center line 220 and the center line 230 of described arc section 23 are tangent at described second end 232 places (the second center line 220 refers to the midline between the two long sides of the second straight section 22, that is, the distance between the midline and the two long sides is equal, as shown in FIG. 4).

This is a preferred and specific structural form of the three-section structure of the present invention (comprising an arc section and two straight sections connected to it respectively), the first straight section is connected to the arc section, and the junction is just right. At the first end position, and at the first end position, the first straight section is tangent to the arcuate section, which can effectively prevent the formation of an inflection point between the straight section and the arcuate section, so that resistance will be generated when the airflow flows through, thereby Reduce the resistance generated when the airflow flows through the evaporator, reduce energy loss, and improve heat exchange efficiency; similarly, connect the second straight section with the arc section, and the junction is just at the second end position, and At the second end position, the first straight section is tangent to the arc section, which can effectively prevent the formation of an inflection point between the straight section and the arc section, so that resistance will be generated when the airflow flows through, thereby reducing the airflow when it flows through the evaporator. The generated resistance reduces energy loss and improves heat transfer efficiency.

Preferably, the angle C2 is an acute angle (preferably 35.40°-39.40°) formed by the intersection of the first midline extension of the first straight section and the second midline extension of the second straight section. This is the preferred form and positional relationship of angle C2 of the present invention. Angle C2 is the included angle of the tangent extension line of two tangent points (first end 231 and second end 232), and the first straight section before is located at the tangent extension line. The second straight section is located on the extension line of another tangent line and coincides with it, which can ensure the smooth transition of the three-section structure between the arc section and the straight section, forming a streamlined shape and reducing airflow resistance, reduce energy loss, and improve the heat transfer efficiency of the evaporator.

Preferably, the long side length L1 of the first straight section 21 ranges from 115 to 135 mm; and/or, the long side length L2 of the second straight section 22 ranges from 80 to 100 mm. This is the preferred value range of the two-section straight section length L1L2 in the evaporator of the three-stage structure of the present invention. and 3 (the length perpendicular to the direction of the paper) under certain conditions, select the size of the evaporator within the above range, the experiment shows that such selection is easy to shape, and the evaporation area is larger, and the air conditioning performance is better. The noise of the air conditioner is greatly improved to ensure that the sound quality of the air conditioner is improved, but the air volume is not reduced.

Preferably, the auxiliary heater is an electric heater. This is the preferred type and structural form of the auxiliary heater in the air-conditioning indoor unit of the present invention, which can be convenient and fast by means of electric heating, has obvious heating effect, and improves user comfort.

The present invention also provides an air conditioner, which includes the aforementioned air conditioner indoor unit. By including the aforementioned air-conditioning indoor unit, by arranging the two auxiliary heaters at the downstream position of the evaporator, and making the center angle C1 formed between the intersection point a and the line connecting the geometric centers of the two auxiliary heaters and the angle of the arc segment C2, and the center angle C1 and angle C2 satisfy the relationship of C1/C2=0.17～0.45, C1/C2<1 means that both auxiliary heaters are located inside the arc section of the evaporator, C1/C2 =0.17～0.45 means that the two auxiliary heaters are closer to each other relative to the arc sections on both sides, that is, the first auxiliary heater and the second auxiliary heater are very close, that is, the distance between the two The distance between the two auxiliary heaters is relatively small, so that the air flow through the gap between the two is relatively small, which effectively reduces the back and forth collision of the air flow through the gap between the two auxiliary heaters, resulting in air flow noise and damping noise. On the other hand, C1/C2 cannot be made too small or even close to zero, so that the opposite sides of the two auxiliary heaters cannot be heated, and the distance between them is too small to cause the airflow to flow through it. The particularly large flow resistance causes backflow and noise. Therefore, in summary, the auxiliary heater can be installed at an appropriate position downstream of the evaporator airflow, thereby minimizing the air outlet noise and air flow noise of the indoor unit. Improve the operating performance of air-conditioning indoor units and even air conditioners.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range. The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made, these improvements and modifications It should also be regarded as the protection scope of the present invention.

Claims (10)

1. An air-conditioning indoor unit, characterized in that it includes an evaporator (2) and an auxiliary heater (6), the cross section of the evaporator (2) includes an arc section (23), Described arc section (23) comprises on its central line (230), the first end (231) that is positioned at one circumferential end and the second end (232) that is positioned at circumferential other end, passes through described first end ( 231) and the tangent passing through the second end (232) intersect at the intersection point a and form an angle C2 between them, The auxiliary heater (6) includes a first auxiliary heater (61) and a second auxiliary heater (62), and on the cross section of the evaporator (2), the first auxiliary heater ( 61) has a first geometric center, the second auxiliary heater (62) has a second geometric center, the first geometric center is connected with the intersection a to form a first connection line, and the second geometric center It is connected with the intersection point to form a second connection line, and a central angle C1 is formed between the first connection line and the second connection line, and the following relationship is satisfied between C1 and C2: C1/ C2=0.17～0.45. 2. The air conditioner indoor unit according to claim 1, characterized in that: the angle C2 ranges from 32.4° to 42.4°. 3 . The air conditioner indoor unit according to claim 1 , wherein the value range of the central angle C1 is 8.0°˜14.0°. 4. The air-conditioning indoor unit according to any one of claims 1-3, characterized in that: the center o of the arc section (23) and the arc section enclose a fan-shaped area, and the first Both the auxiliary heater (61) and the second auxiliary heater (62) are arranged in the fan-shaped area. 5. The air-conditioning indoor unit according to any one of claims 1-4, characterized in that: the cross section of the evaporator further includes a first straight section (21) and a second straight section (22), the The arc segment (23) is connected to the first straight segment (21) through the first end, and connected to the second straight segment (22) through the second end; The first straight section (21) includes a long side and a short side, and a first center line (210) parallel to the long side, and the first center line (210) is connected to the center line of the arc section (23) ( 230) is tangent at the first end (231); the second straight section (22) also includes a long side and a short side, and a second midline (220) parallel to the long side, the second midline (220) is tangent to the centerline (230) of said arc segment (23) at said second end (232). 6. The air-conditioning indoor unit according to claim 5, characterized in that: the angle C2 is the extension line of the first centerline (210) of the first straight section and the extension line of the second straight section An acute included angle formed by the intersection of the extended lines of the second central line (220). 7. The air conditioner indoor unit according to claim 6, wherein the value range of the angle C2 is 35.40°-39.40°. 8. The air-conditioning indoor unit according to any one of claims 6-7, characterized in that: the long side length L1 of the first straight section (21) ranges from 115 to 135 mm; and/or, the second The long side length L2 of the second straight section (22) ranges from 80 to 100mm. 9. The air conditioner indoor unit according to any one of claims 1-8, wherein the auxiliary heater is an electric heater. 10. An air conditioner, characterized in that it comprises the air conditioner indoor unit according to any one of claims 1-9.