Air supply device

Abstract

An air supply device comprises a shell, a volute tongue, a volute, a shaded pole motor and a wind wheel assembly driven by the shaded pole motor. The volute tongue and the volute are located in the shell, the shell, the volute tongue and the volute jointly form an air duct, the shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both communicated with the air duct; a filter screen is arranged at the air inlet; the wind wheel assembly is rotatably mounted in the air duct and is provided with a separation blade; a photoelectric sensor matched with the separation blade is arranged on the volute; the photoelectric sensor is arranged to detect the rotating speed of the wind wheel assembly through cooperation with the blocking piece.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and more specifically to an air supply device. Background Art

[0002] The air supply device usually has a filter at its air inlet to filter out foreign particles in the surrounding air and prevent foreign particles from entering the air supply device from the air inlet and causing adverse effects on the wind wheel assembly or other control modules. For example, foreign particles (dust) accumulate in the operating part of the motor or on the surface of the control circuit board, thereby causing the wind wheel assembly to operate poorly or the control circuit board to short-circuit.

[0003] After the air supply device has been running for a period of time, dust will accumulate on the surface of the filter, causing the filtering performance of the filter to deteriorate. Moreover, since the filter itself is clogged with dust, air cannot be smoothly introduced from the air inlet into the air supply device, thereby reducing the use effect of the entire air supply device.

[0004] Therefore, it is necessary to frequently check whether the filter is dusty and remind the user to clean the filter in time. However, the air supply device in the prior art cannot realize intelligent automatic real-time detection of the dust accumulation rate of the filter, so it cannot achieve the purpose of reminding the user to clean or replace the filter in time.

[0005] Therefore, the industry needs to provide an improved air supply device to overcome the above-mentioned defects of the prior art. Utility Model Content

[0006] The purpose of the utility model is to solve the above-mentioned problem and provide an air supply device.

[0007] In order to meet the purpose of the utility model, the utility model adopts the following technical solutions:

[0008] An air supply device, comprising:

[0009] An outer shell, a volute tongue and a volute, wherein the volute tongue and the volute are located inside the outer shell, and the outer shell, the volute tongue and the volute together constitute an air duct, the outer shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both connected to the air duct; the air inlet is provided with a filter;

[0010] A shaded-pole motor and a wind wheel assembly driven by the shaded-pole motor, wherein the wind wheel assembly is rotatably mounted on the air duct and has a baffle; a photoelectric sensor cooperating with the baffle is arranged on the volute; the photoelectric sensor is arranged to detect the rotation speed of the wind wheel assembly by cooperating with the baffle.

[0011] Preferably, the baffle extends outwardly along the radial direction of the wind wheel assembly, and the end of the baffle is arc-shaped.

[0012] Preferably, the wind wheel assembly comprises a wind wheel base and wind wheel blades arranged on the wind wheel base, and the radial outer end of the wind wheel base forms the baffle.

[0013] Preferably, a detection slot is provided on the photoelectric sensor; and the baffle is arranged to pass through the detection slot as the wind wheel blades rotate so that the photoelectric sensor detects the rotation speed of the wind wheel assembly.

[0014] Preferably, a relay and a control circuit board electrically connected to the relay are provided at the top of the wind wheel assembly, and the relay is electrically connected to the photoelectric sensor.

[0015] More preferably, it further comprises a base, and the shaded-pole motor, the wind wheel assembly, the volute and the volute tongue are all arranged on the base. Preferably, an air outlet grille is also arranged on the outer shell.

[0016] Preferably, the photoelectric sensor is configured to detect the rotational speed data of the wind wheel assembly, the control circuit board is configured to obtain the rotational speed data and determine the wind resistance state of the filter, and control the working state of the relay according to the wind resistance state.

[0017] Compared with the prior art, the beneficial technical effects of the utility model are as follows:

[0018] In the air supply device provided by the utility model, since the outer shell, the volute tongue and the volute together constitute the air duct, the outer shell is provided with an air inlet, and the air inlet is connected to the air duct; the air inlet is provided with a filter; the wind wheel assembly is rotatably mounted on the air duct, and the wind wheel assembly has a baffle; a photoelectric sensor cooperating with the baffle is arranged on the volute; when the wind wheel assembly rotates, it drives the baffle to rotate together, and the photoelectric sensor is arranged on the volute and remains stationary. When the baffle rotates, it frequently blocks the light path of the photoelectric sensor, thereby triggering the internal circuit of the photoelectric sensor, and then the speed of the wind wheel assembly can be measured by calculating the frequency of the blocking. Then, it can be judged whether the filter needs to be cleaned according to the speed. For example, when the speed is very low, the resistance of the wind wheel assembly when rotating is very large, and the resistance is caused by too much dust on the filter, which makes it impossible for external air to enter the air duct. At this time, the user can be reminded to clean or replace the filter.

[0019] Additional aspects and advantages of the present invention will be partially given in the following description, which will become apparent from the following description or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 This is a three-dimensional structural diagram of an air supply device according to an embodiment of the utility model.

[0022] Figure 2 for Figure 1 The three-dimensional structural exploded view of the air supply device shown.

[0023] Figure 3 for Figure 1 A three-dimensional structural diagram of the internal structure of the air supply device shown.

[0024] Figure 4 for Figure 1 A three-dimensional structural diagram of the air supply device shown from another angle.

[0025] Figure 5 for Figure 2 An enlarged structural view of part A of the air supply device is shown. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention and cannot be interpreted as limiting the present invention.

[0027] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say that an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may be intermediate elements. In addition, the "connection" or "coupling" used here may include wireless connection or wireless coupling. The term "and / or" used here includes all or any unit and all combinations of one or more associated listed items.

[0028] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0029] In one embodiment of the present invention, reference Figure 1-5 , an air supply device 100 is provided, comprising:

[0030] The outer shell 90, the volute tongue 50 and the volute 40, wherein the volute tongue 50 and the volute 40 are located in the outer shell 90. The outer shell 90, the volute tongue 50 and the volute 40 together constitute an air duct, the outer shell 90 is provided with an air inlet and an air outlet, the air inlet and the air outlet are both connected to the air duct; the air inlet is provided with a filter 60.

[0031] The housing 90 can be made of any suitable material, such as a plastic material. The housing 90 is a main component of the air supply device 100, and is used to install the remaining components mentioned above inside so as to form an integral structure. Two openings are formed at two different positions on the housing 90 to serve as an air inlet and an air outlet respectively. The air inlet is used to allow external air to flow into the air duct, and the air outlet is used to process the air in the air duct and then transmit it out again.

[0032] The volute tongue 50 and the volute case 40 both have specific structures. When they are arranged at different positions in the housing 90, they can shape the air entering the air duct through their specific external shapes, that is, they can change the direction, speed and other parameters of the air flowing in the air duct. Since the specific structure and material of the volute tongue and the volute case are not the main improvement points of the present invention, they will not be described in detail.

[0033] The air supply device 100 further includes a shaded pole motor 20 and a wind wheel assembly 30 driven by the shaded pole motor 20. The wind wheel assembly 30 is rotatably mounted on the air duct. The wind wheel assembly 30 has a group of blades. When the shaded pole motor 20 drives the wind wheel assembly 30, the blades begin to rotate in the air duct, so that the external air can be sucked into the air duct from the air inlet. During the rotation of the external air entering the air duct in the air duct, the air flow speed and direction are changed to a certain extent by the action of the volute tongue and the volute, and then flow out from the air outlet.

[0034] The filter 60 is arranged at the air inlet to filter the external air so as to filter out the suspended impurities in the air, ensure that the air entering the air duct is free of large particles of impurities, and further ensure that the wind wheel assembly 30 in the air duct can operate smoothly. After the air supply device 100 has been running for a period of time, there will be a lot of dust accumulated on the filter 60, and the dust accumulation will cause the filter 60 to be blocked over a large area, thus causing the air inlet to be blocked, thereby causing the entire air supply device to operate poorly. For this reason, it is necessary to be able to set the air supply device to remind the user to replace or clean the filter 60 at an appropriate time, which is achieved through the following structure.

[0035] Specifically, in one embodiment of the utility model, the wind wheel assembly 30 has a baffle 322; the volute 40 is provided with a photoelectric sensor 70 that cooperates with the baffle 322; the photoelectric sensor 70 is configured to detect the rotation speed of the wind wheel assembly 30 by cooperating with the baffle 322. When the baffle 322 rotates, it frequently blocks the light path of the photoelectric sensor 70, thereby triggering the circuit inside the photoelectric sensor 70, and then the rotation speed of the wind wheel assembly 30 can be measured by calculating the blocking frequency. Then, it can be determined whether the filter 60 needs to be cleaned according to the rotation speed. For example, when the rotation speed is very low, the resistance of the wind wheel assembly 30 when rotating is very large, and the resistance is generated because there is too much dust on the filter 60, resulting in the inability of external air to enter the air duct. At this time, the user can be reminded to clean or replace the filter.

[0036] Preferably, in one embodiment, the baffle 322 extends radially outwardly along the wind wheel assembly 30, and the end of the baffle 322 is arc-shaped. The baffle 322 extending radially outward can fully extend into the optical path range of the photoelectric sensor 70, so that the photoelectric sensor 70 can accurately detect the rotation speed of the wind wheel assembly 30. In addition, designing the end of the baffle 322 to be, for example, an arc shape can reduce the noise generated when the wind wheel assembly 30 rotates.

[0037] Further preferably, the wind wheel assembly 30 has a wind wheel base 31 and a wind wheel blade 32 disposed on the wind wheel base 31, and the radially outer end of the wind wheel base 31 forms the baffle 322. In addition, a detection slot 72 is provided on the photoelectric sensor 70; the baffle 322 is configured to pass through the detection slot 72 as the wind wheel blade 32 rotates so that the photoelectric sensor 70 detects the rotation speed of the wind wheel assembly 30. The detection slot 72 forms an optical path of the photoelectric sensor 70, and when the baffle 322 passes through the detection slot 72, the optical path is blocked, thereby triggering the internal circuit of the photoelectric sensor 70, so that the frequency of the baffle 322 passing through the detection slot 72 can be detected, and the rotation speed of the baffle 322 and the wind wheel assembly 30 can be further calculated.

[0038] In one embodiment, a relay 94 and a control circuit board 92 electrically connected to the relay 94 may be provided at the top of the wind wheel assembly 30, and the relay 94 is electrically connected to the photoelectric sensor 70. The relay 94 and the control circuit board 92 are used to analyze and calculate the data detected by the photoelectric sensor 70, and then determine the actual rotation speed of the wind wheel assembly 30. Accordingly, the photoelectric sensor 70 is configured to detect the rotation speed data of the wind wheel assembly 30, and the control circuit board 92 is configured to obtain the rotation speed data and determine the wind resistance state of the filter 60, and control the working state of the relay 94 according to the wind resistance state.

[0039] Preferably, the air supply device 100 further comprises a base 10, and the shaded-pole motor 20, the wind wheel assembly 30, the volute 40 and the volute tongue 50 are all arranged on the base 10. By setting in this way, the above components can be stably mounted on the housing 90, thereby ensuring the structural strength of the entire air supply device 100.

[0040] Optionally, an air outlet grille 70 may be provided on the housing 90 , and the air outlet grille 70 is provided at the air outlet so as to guide the air being sent out.

[0041] Those skilled in the art will appreciate that the various operations, methods, steps, measures, and schemes in the processes discussed in this application may be alternated, altered, combined, or deleted. Further, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted. Further, the steps, measures, and schemes in the prior art that are similar to those disclosed in this application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

[0042] The above description is only a partial implementation method of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An air supply device, characterized in that: include: An outer shell, a volute tongue and a volute, wherein the volute tongue and the volute are located inside the outer shell, and the outer shell, the volute tongue and the volute together constitute an air duct, the outer shell is provided with an air inlet and an air outlet, and the air inlet and the air outlet are both connected to the air duct; the air inlet is provided with a filter; A shaded-pole motor and a wind wheel assembly driven by the shaded-pole motor, wherein the wind wheel assembly is rotatably mounted on the air duct and has a baffle; a photoelectric sensor cooperating with the baffle is arranged on the volute; the photoelectric sensor is arranged to detect the rotation speed of the wind wheel assembly by cooperating with the baffle.

2. The air supply device according to claim 1, characterized in that: The baffle extends outwardly along the radial direction of the wind wheel assembly, and the end of the baffle is arc-shaped.

3. The air supply device according to claim 2, characterized in that: The wind wheel assembly comprises a wind wheel base and wind wheel blades arranged on the wind wheel base, and the radial outer end of the wind wheel base forms the baffle.

4. The air supply device according to claim 3, characterized in that: A detection slot is provided on the photoelectric sensor; the baffle is arranged to pass through the detection slot as the wind wheel blades rotate so that the photoelectric sensor detects the rotation speed of the wind wheel assembly.

5. The air supply device according to claim 4, characterized in that: A relay and a control circuit board electrically connected to the relay are arranged at the top of the wind wheel assembly, and the relay is electrically connected to the photoelectric sensor.

6. The air supply device according to claim 1, characterized in that: It also includes a base, and the shaded-pole motor, wind wheel assembly, volute and volute tongue are all arranged on the base.

7. The air supply device according to claim 1, characterized in that: An air outlet grille is also arranged on the shell.

8. The air supply device according to claim 5, characterized in that: The photoelectric sensor is configured to detect the rotation speed data of the wind wheel assembly, and the control circuit board is configured to obtain the rotation speed data and determine the wind resistance state of the filter, and control the working state of the relay according to the wind resistance state.

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