Double-layer flow fan and automobile air conditioner
By employing backward-curved blades and an optimized volute outlet angle design in the dual-layer flow fan, the problems of high wind speed and poor wind speed uniformity have been solved, resulting in a more stable and quieter airflow and improved passenger comfort.
Patent Information
- Application Number
- CN202520275094.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-02-20
AI Technical Summary
Existing dual-layer flow fans have high outlet air velocity and poor air velocity uniformity, which affects passenger comfort.
The impeller assembly, featuring a backward-curved blade design, combined with the air outlet angle adjustment of the volute, creates upper and lower laminar flow spaces. The use of partition plates and guide plates optimizes airflow, reduces turbulence and noise, and improves wind speed uniformity.
The reduced outlet wind speed of the fan improved wind speed uniformity and enhanced passenger comfort.
Smart Images
Figure CN223952894U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile air conditioner, specifically relates to a double -deck flow fan and automobile air conditioner. BACKGROUND
[0002] The automobile air conditioner is used for adjusting and controlling the temperature, humidity, air cleanliness and air flow in the vehicle cabin in the best state to provide a good comfortable environment in the vehicle cabin and improve the comfort of the passengers. The heat pump technology is used to introduce the air outside the vehicle into the vehicle interior or circulate the air inside the vehicle to realize heating or cooling in the vehicle. The conventional air conditioner box can only realize the outside circulation or the inside circulation, which leads to high energy consumption and short driving range. To solve the problem of energy consumption, the double -deck flow automobile air conditioner is born.
[0003] The double -deck flow air conditioner is a kind of high -efficient energy -saving air conditioning system, compared with the traditional air conditioning system, the double -deck flow air conditioner system does not need to maintain the suitable indoor environment by a large amount of circulating air, but optimizes the air flow path, so that the air can flow better, and at the same time, a suitable amount of air is blown in a suitable position to achieve a more comfortable effect. The double -deck flow automobile air conditioner includes a volute, a impeller assembly located in the volute and a motor for driving the impeller assembly to rotate, wherein the impeller assembly includes an upper impeller and a lower impeller. The double -deck flow fan is used to separate the inside and outside air in winter, and to reduce the air exchange loss while defrosting with outside air, so as to achieve the effect of energy saving. Figure 1 As shown in the figure, the current double -deck flow fan uses the front -tilting blade 23', the air outlet angle θ' of the volute 10 (the included angle θ' of the center line of the volute air outlet inside 10a and the volute air outlet outside 10b to the impeller assembly) is generally small (about 30°-60°), so the outlet air speed is high, and the uniformity of the outlet air speed is poor, which leads to the increase of the outlet passage ventilation resistance, and affects the air volume and noise performance, and further affects the comfort of the passengers. UTILITY MODEL CONTENTS
[0004] In view of the problems in the prior art, the utility model aims at providing a double -deck flow fan and automobile air conditioner, which reduces the fan outlet air speed, improves the uniformity of the fan outlet air speed, and improves the comfort of the passengers.
[0005] The utility model discloses a double -deck flow fan, including volute and rotatablely located in the volute inside impeller subassembly, the volute inside still is equipped with the baffle, the baffle divides the volute into upper flow space and lower flow space, the impeller subassembly includes the upper impeller of upper flow space and the lower impeller of lower flow space, the upper impeller includes first hub rim and a plurality of first blades that are arranged in the circumference of first hub rim, the lower impeller includes second hub rim and a plurality of second blades that are arranged in the circumference of second hub rim, the first blade and the second blade are all backward inclined blade, the included angle that the outtake inboard of volute and the center point of the outtake of volute to the baffle forms is theta, satisfies: 70 DEG ≤ theta ≤ 180 DEG.
[0006] In some embodiments, the impeller subassembly further comprises a partition plate for separating the upper impeller and the lower impeller, and the partition plate is arranged on the inner side of the upper impeller.
[0007] In some embodiments, the impeller subassembly further comprises a guide plate for guiding flow, which is arranged on the inner side of the lower impeller, and the top end of the guide plate is lower than the top end of the upper impeller and higher than the bottom end of the partition plate.
[0008] In some embodiments, the partition plate is a revolved body structure in the shape of a horn, and the guide plate is a revolved body structure in the shape of a cone.
[0009] In some embodiments, the volute comprises an upper volute, a lower volute and a partition plate that are mutually coupled, the partition plate is located between the upper volute and the lower volute, the partition plate and the upper volute jointly form the upper flow space, and the partition plate and the lower volute jointly form the lower flow space.
[0010] In some embodiments, the upper volute comprises a first air inlet, and two ends of a first circulating air duct or a second circulating air duct are respectively communicated with the first air inlet and the upper flow space; the lower volute comprises a second air inlet, and two ends of the second circulating air duct or the first circulating air duct are respectively communicated with the second air inlet and the lower flow space.
[0011] In some embodiments, the first circulating air duct is an inner circulating air duct for introducing circulating air into the vehicle, and the second circulating air duct is an outer circulating air duct for introducing external fresh air.
[0012] In some embodiments, the first blades and the second blades are arranged in a staggered or non-staggered manner.
[0013] In some embodiments, further comprising a motor, and an output end of the motor is connected to the center of the guide plate.
[0014] The utility model embodiment further provides an automobile air conditioner, including the double -deck flow blower fan like above.
[0015] The double -deck flow blower fan and the automobile air conditioner have the following advantages.
[0016] By setting the blade of the impeller assembly as a backward inclined blade, the turbulence generated when the impeller operates is small, the airflow flows smoothly, and the air flow is more stable, the operation noise is small, the air outlet speed is reduced, and the air speed uniformity is improved. BRIEF DESCRIPTION OF DRAWINGS
[0017] Other features, objects and advantages of the utility model will become more apparent through reading the detailed description of the non - limiting embodiments with reference to the following drawings.
[0018] Figure 1 A top view of a double -deck flow blower fan in the prior art is shown;
[0019] Figure 2 A side view of the double -deck flow blower fan of an embodiment of the utility model is shown;
[0020] Figure 3 A top view of the double -deck flow blower fan of an embodiment of the utility model is shown;
[0021] Figure 4 A side view of the double -deck flow blower fan of another embodiment of the utility model is shown.
[0022] Reference signs:
[0023] 10 volute 22 lower impeller
[0024] 10a volute air outlet inner side 23' blade of impeller assembly in the prior art
[0025] 10b volute air outlet outer side 23 blade of impeller assembly in the embodiment
[0026] 11 upper volute 24 partition plate
[0027] 12 lower volute 25 guide plate
[0028] 13 isolation plate 1 first circulating air duct
[0029] 20 impeller assembly 2 second circulating air duct
[0030] 21 upper impeller DETAILED DESCRIPTION
[0031] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations can, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the inventive aspects of the example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the several views of the drawings and like reference numerals, reference characters, or reference symbols in different figures, indicate identical or similar elements, and thus description of the same will be simplified or omitted. In the description of the present disclosure, expressions such as "one implementation", "some implementations", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material, or characteristic is included in at least one implementation or example of the present disclosure. In addition, the expressions "in one implementation" or "in some implementations", which are used in describing the present disclosure, mean that a particular feature, structure, material, or characteristic are included in at least one implementation or example of the present disclosure. In addition, those skilled in the art can combine or classify the disclosed implementations and characteristics thereof in various ways. Further, those skilled in the art can perform further implementation of the present disclosure by combining or classifying the disclosed implementations and characteristics thereof in various ways. Further, those skilled in the art can perform further implementation of the present disclosure by combining or classifying the disclosed implementations and characteristics thereof in various ways.
[0032] In addition, the terms "first", "second", etc. are used merely as identifiers and are not intended to signify or imply relative importance or a number of indicated technical features. Thus, features defined with "first", "second", etc. can explicitly or implicitly include at least one of the features. In the present disclosure, the meaning of "plurality" is two or more, unless specifically limited otherwise.
[0033] It should be further understood that the terms "comprise", "comprising", "include", "including" mean the presence of the stated features, steps, operations, elements, components, items, kinds, and / or groups but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" as used herein are to be interpreted as inclusive or meaning any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". An exception to this definition will occur only when a combination of elements, functions, steps or acts are in some way inherently mutually exclusive.
[0034] To solve the problems in the prior art, the embodiment of the utility model provides a double-layer flow fan. As shown in the drawings, Figure 2 and Figure 3As shown, the double-layer flow fan includes a volute 10 and an impeller assembly 20 rotatably arranged inside the volute 10. The interior of the volute 10 is separated into an upper flow space and a lower flow space. The impeller assembly 20 includes an upper impeller 21 located in the upper flow space and a lower impeller 22 located in the lower flow space. The upper impeller 21 is located in the upper flow space, and the lower impeller 22 is located in the lower flow space. First circulating air (for example, external fresh air) is circulated by the upper impeller 21, and second circulating air (for example, in-vehicle circulating air) is circulated by the lower impeller 22, thereby achieving double-layer flow. The upper impeller 21 includes a first hub rim and a plurality of first blades arranged circumferentially along the first hub rim. The lower impeller 22 includes a second hub rim and a plurality of second blades arranged circumferentially along the second hub rim. The first blades and the second blades are both backward inclined blades 23. An included angle θ formed between the inner side 10a of the air outlet of the volute 10 and a line connecting the outer side 10b of the air outlet of the volute 10 to the center point of the impeller assembly 20 satisfies 70°≤θ≤180°.
[0035] It should be noted here that blade forward inclination refers to the bending direction of the blade being consistent with the direction of air flow rotation. After the air flow enters the blade, it flows along the bending direction of the blade leading edge. Blade backward inclination refers to the bending direction of the blade being opposite to the direction of air flow rotation. After the air flow enters the blade, it flows along the bending direction of the blade trailing edge. In the technical solution of the present application, by arranging the blades of the impeller assembly as backward inclined blades, the turbulence generated by the operation of the impeller can be reduced, the air flow can flow smoothly, the air flow can be more stable, the operation noise can be reduced, the air outlet air speed can be reduced, and the air speed uniformity can be improved. The air volume of the backward inclined blade is smaller than that of the forward inclined blade. Therefore, by increasing the air outlet angle of the volute, the backward inclined blade can be arranged correspondingly to reduce the air volume of the air outlet, thereby improving the comfort of passengers in the vehicle.
[0036] Further, as shown in Figure 2 The impeller assembly 20 further includes a partition plate 24 for separating the upper impeller 21 and the lower impeller 22. The partition plate 24 is arranged on the inner side of the upper impeller 21. In this embodiment, the partition plate 24 is a horn-shaped rotary body structure.
[0037] Further, the impeller assembly 20 further includes a guide plate 25 for guiding the flow. The guide plate 25 is arranged on the inner side of the lower impeller 22. In this embodiment, the guide plate 25 is a conical rotary body structure, and the top end of the guide plate 25 is lower than the top end of the upper impeller 21 and higher than the bottom end of the partition plate 24. The guide plate 25 and the partition plate 24 are coaxially arranged. Specifically, the outer wall of the guide plate 25 is an arc surface structure, so that the circulating air flows smoothly between the guide plate 25 and the partition plate 24 without turbulence.
[0038] Further, in some embodiments, the volute 10 comprises an upper volute 11, a lower volute 12 and a partition plate 13, the partition plate 13 is located between the upper volute 11 and the lower volute 12, the partition plate 13 and the upper volute 11 enclose an upper flow space, and the partition plate 13 and the lower volute 12 enclose a lower flow space. The upper flow space and the lower flow space are not connected, so that the upper impeller 21 and the lower impeller 22 do not have wind leakage problem when operating.
[0039] Further, as shown in Figure 2 and Figure 4 , the upper volute 11 comprises a first air inlet, the lower volute 12 comprises a second air inlet, and two ends of one of the first circulating air duct 1 or the second circulating air duct 2 are respectively connected to the first air inlet and the upper flow space, and two ends of the other of the second circulating air duct 2 or the first circulating air duct 1 are respectively connected to the second air inlet and the lower flow space. In this embodiment, the first air inlet of the upper volute 11 and the second air inlet of the lower volute 12 are both arranged at the top of the volute 10, that is, the double-layer flow fan is a single-side air inlet.
[0040] As shown in Figure 4 , in another embodiment, the first air inlet of the upper volute 11 is arranged at the top of the volute 10, and the second air inlet of the lower volute 12 is arranged at the bottom of the volute 10, that is, the first air inlet of the upper volute 11 and the second air inlet of the lower volute 12 are arranged at two sides of the volute 10, and the double-layer flow fan is a double-side air inlet. In actual application, the double-layer flow fan can be reasonably arranged as a double-side air inlet or a single-side air inlet, and the specific arrangement position of the air inlet on the volute 10 is not limited here.
[0041] The first circulating air duct 1 is an internal circulating air duct for introducing internal circulating air, and the second circulating air duct 2 is an external circulating air duct for introducing external fresh air. In this embodiment, two ends of the first circulating air duct 1 are respectively connected to the second air inlet and the lower flow space, and two ends of the second circulating air duct 2 are respectively connected to the first air inlet and the upper flow space. When the internal circulating air passes through the second air inlet, is deflected at the bottom of the lower impeller 22 through the first circulating air duct 1, and then enters the lower flow space, the internal circulating air is driven to blow to the face or the feet of the passenger by the rotation of the lower impeller 22 for heating. When the external fresh air passes through the first air inlet, enters the upper flow space through the second circulating air duct 2, and then is driven to blow to the window by the rotation of the upper impeller 21 for defrosting.
[0042] Further, in a preferred embodiment, the first blades of the upper impeller 21 and the second blades of the lower impeller 22 are arranged in a staggered or non-staggered manner. Preferably, the staggered arrangement of the first blades and the second blades can reduce the noise when the impeller assembly 20 rotates.
[0043] Further, the double-layer flow fan further comprises a motor 30, an output end of the motor 30 is connected with the center of the guide plate 25, and the motor 30 can drive the impeller assembly 20 to rotate.
[0044] Further, the embodiment further provides an automobile air conditioner, which comprises the double-layer flow fan as described above, and the automobile air conditioner can achieve all the technical effects of the double-layer flow fan, which will not be repeated here.
[0045] To sum up, the double-layer flow fan and the automobile air conditioner have the following advantages:
[0046] By setting the blades of the impeller assembly as backward inclined blades, the turbulence generated when the impeller rotates is small, the airflow flows smoothly, the air flow is more stable, the operation noise is small, the air outlet speed is reduced, and the air speed uniformity is improved.
[0047] The above is a further detailed description of the utility model in combination with the specific preferred embodiment, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can be made, which should be regarded as falling within the protection scope of the utility model.
Claims
1. A double-layer flow fan, comprising a volute and an impeller assembly rotatably disposed inside the volute, the interior of the volute being divided into an upper laminar flow space and a lower laminar flow space, the impeller assembly comprising an upper impeller located in the upper laminar flow space and a lower impeller located in the lower laminar flow space, characterized in that, The upper impeller includes a first hub flange and a plurality of first blades arranged circumferentially along the first hub flange; the lower impeller includes a second hub flange and a plurality of second blades arranged circumferentially along the second hub flange; both the first blades and the second blades are backward-curved blades, and the angle formed by the line connecting the inner side of the air outlet of the volute and the outer side of the air outlet of the volute to the center point of the impeller is θ, which satisfies: 70°≤θ≤180°.
2. The dual-layer flow fan according to claim 1, characterized in that, The impeller assembly further includes a partition plate for separating the upper impeller and the lower impeller, the partition plate being disposed on the inner side of the upper impeller.
3. The dual-layer flow fan according to claim 2, characterized in that, The impeller assembly also includes a guide plate for guiding flow, disposed inside the lower impeller, with the top of the guide plate lower than the top of the upper impeller and higher than the bottom of the partition plate.
4. The dual-layer flow fan according to claim 3, characterized in that, The partition plate is a funnel-shaped rotating structure, and the guide plate is a cone-shaped rotating structure.
5. The dual-layer flow fan according to claim 1, characterized in that, The volute includes an upper volute, a lower volute, and a partition plate that interlock with each other. The partition plate is located between the upper volute and the lower volute. The partition plate and the upper volute together form the upper laminar flow space, and the partition plate and the lower volute together form the lower laminar flow space.
6. The dual-layer flow fan according to claim 5, characterized in that, The upper volute includes a first air inlet, and the two ends of a first circulating air duct or a second circulating air duct are respectively connected to the first air inlet and the upper laminar flow space; the lower volute includes a second air inlet, and the two ends of the second circulating air duct or the first circulating air duct are respectively connected to the second air inlet and the lower laminar flow space.
7. The dual-layer flow fan according to claim 6, characterized in that, The first circulating air duct is an internal circulating air duct that introduces recirculated air into the vehicle, and the second circulating air duct is an external circulating air duct that introduces fresh air from outside.
8. The dual-layer flow fan according to claim 1, characterized in that, The first blade and the second blade are either misaligned or not misaligned.
9. The dual-layer flow fan according to claim 3, characterized in that, It also includes a motor, the output end of which is connected to the center of the guide plate.
10. An automotive air conditioner, characterized in that, Including the dual-layer flow fan as described in any one of claims 1 to 9.