Noise reduction type air purifier

Abstract

The utility model relates to the technical field of air purification, and discloses a noise reduction type air purifier which comprises a shell, a noise reduction device and a noise reduction device. The filter element filtering device and the discharge filtering device are sequentially arranged in the airflow channel, and the filter element filtering device is arranged on the upstream of the discharge filtering device; the filter element filtering device comprises a primary-effect filter element, and the resistance of the primary-effect filter element at the wind speed of 2 m / s is smaller than or equal to 30 Pa; the discharge filtering device comprises a discharge device and a medium-efficiency filter element, and the resistance of the medium-efficiency filter element at the wind speed of 2 m / s is smaller than or equal to 60 Pa; according to the noise reduction type air purifier, the filter element filtering device and the discharge filtering device are connected in series in the airflow channel, so that the overall filtering effect can be guaranteed, and due to the fact that the wind resistance of the primary-efficiency filter element and the wind resistance of the intermediate-efficiency filter element are low, the overall filtering resistance is reduced, and the noise problem of the air purifier is solved.

Description

Technical Field

[0001] This utility model relates to the field of air purification technology, specifically to a noise-reducing air purifier. Background Technology

[0002] Existing air purifiers often generate considerable noise during normal operation. This is because air purifiers need to provide a large volume of clean air, which often results in high filtration resistance and thus, significant noise. Utility Model Content

[0003] In view of this, the present invention provides a noise-reducing air purifier to solve the problem of excessive noise in existing air purifiers.

[0004] In a first aspect, this utility model provides a noise-reducing air purifier, comprising:

[0005] A housing having an airflow channel within it;

[0006] A filter element filtration device and a discharge filtration device are sequentially arranged in the airflow channel, with the filter element filtration device located upstream of the discharge filtration device.

[0007] The filter element filtration device includes a pre-filter element, and the resistance of the pre-filter element at a wind speed of 2m / s is ≤30 Pa.

[0008] The discharge filtration device includes a discharge device and a medium-efficiency filter element, wherein the resistance of the medium-efficiency filter element is ≤60 Pa at a wind speed of 2 m / s.

[0009] The noise-reducing air purifier provided by this utility model connects the filter element and the discharge filter element in series in the airflow channel, thereby ensuring the overall filtration effect. Since the wind resistance of the pre-filter and the medium-efficiency filter element is low, the overall filtration resistance is reduced, thus improving the noise problem of the air purifier.

[0010] Optionally, the discharge device includes a metal orifice plate and a discharge needle, the metal orifice plate having a plurality of openings, and the discharge needle pointing perpendicularly to the openings of the metal orifice plate.

[0011] With the above setup, the particulate matter in the airflow becomes charged after passing through the metal perforated plate and discharge needle, which facilitates the subsequent adsorption of the charged particulate matter by the medium-efficiency filter element.

[0012] Optionally, the discharge needle is provided in a one-to-one correspondence with the opening.

[0013] The above settings enable the particles in the airflow passing through the openings to become more charged, ensuring that the charged particles are subsequently adsorbed.

[0014] Optionally, the opening includes: a round hole, a square hole, and / or a perforated hole.

[0015] Optionally, the aperture ratio of the metal perforated plate is between 50% and 95%.

[0016] The above settings ensure smooth airflow and prevent openings from increasing airflow resistance.

[0017] Optionally, the discharge needle is fixed on a printed circuit board strip.

[0018] The above settings facilitate the supply of electrical energy to the discharge needle.

[0019] Optionally, the primary filter element comprises: non-woven fabric, metal mesh, and / or glass fiber.

[0020] Optionally, the medium-efficiency filter element includes: an upstream metal mesh, a downstream metal mesh, and a central material sandwiched between the upstream metal mesh and the downstream metal mesh.

[0021] Optionally, the central material includes: nanofibers and / or meltblown fabric.

[0022] Optionally, the medium-efficiency filter element has a resistance of 5-20 Pa at an air velocity of 5.33 cm / s.

[0023] The above settings can further improve the noise problem of air purifiers. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a front view of a noise-reducing air purifier according to an embodiment of the present utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Housing; 2. Primary filter element; 3. Metal perforated plate; 4. Discharge needle; 5. Secondary filter element; 6. Upstream metal mesh; 7. Downstream metal mesh; 8. Core material. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0029] like Figure 1 As shown, this is a specific implementation of the noise-reducing air purifier provided in this embodiment, including: a housing 1, the housing 1 having an airflow channel, and a filter element and a discharge filter being sequentially arranged in the airflow channel, the filter element being arranged upstream of the discharge filter; that is, during the filtration process, the airflow passes through the filter element and the discharge filter sequentially in the airflow channel of the housing 1.

[0030] The filter element filtration device includes a primary filter element 2, the primary filter element 2 having a resistance ≤30 Pa at a wind speed of 2 m / s; the discharge filtration device includes a discharge device and a medium-efficiency filter element 5, the medium-efficiency filter element 5 having a resistance ≤60 Pa at a wind speed of 2 m / s.

[0031] The noise-reducing air purifier provided by this utility model connects the filter element and the discharge filter element in series in the airflow channel, thereby ensuring the overall filtration effect. Since the wind resistance of the pre-filter and the medium-efficiency filter element is low, the overall filtration resistance is reduced, thus improving the noise problem of the air purifier.

[0032] Specifically, the original filter element inside the housing was a HEPA filter element. Existing HEPA filters have a resistance >100Pa at a wind speed of 2m / s. This embodiment removes the original filter element and sequentially installs a pre-filter and a discharge filter device in the airflow channel of the housing. The pre-filter intercepts large particles in the airflow, while the discharge device in the discharge filter charges the particles. The medium-efficiency filter element in the discharge filter device further blocks the charged particles, thus ensuring effective filtration. This arrangement reduces the wind resistance of the pre-filter and the medium-efficiency filter element in the discharge filter device, thereby reducing operational wind resistance and noise.

[0033] The noise-reducing air purifier provided in this embodiment has a resistance of 43 Pa at a wind speed of 1.5 m / s. Compared to the original filter element before the improvement, which had a resistance of 192 Pa at a wind speed of 1.5 m / s, the resistance of this embodiment has decreased from 192 Pa to 43 Pa, a resistance reduction of 78%, and the filtration efficiency has increased from 95% to 99%.

[0034] The noise-reducing air purifier provided in this embodiment, when tested at an ambient noise level of 30 decibels and a wind speed of 1.5 m / s, can reduce noise by 3.5 dB compared to the original filter.

[0035] like Figure 1 As shown, in this embodiment, the discharge device includes a metal perforated plate 3 and a discharge needle 4. The metal perforated plate 3 has a plurality of openings, and the discharge needle 4 is perpendicularly pointed to the openings of the metal perforated plate 3. With the above arrangement, the particulate matter in the airflow becomes charged after passing through the metal perforated plate 3 and the discharge needle 4, thereby facilitating the subsequent adsorption of the charged particulate matter by the medium-efficiency filter element 5.

[0036] It should be noted that the above description of the discharge device is not limiting, and in some alternative embodiments, discharge devices with other structures may also be used.

[0037] like Figure 1 As shown, in this embodiment, the discharge needle 4 is configured in a one-to-one correspondence with the opening. This configuration allows the particles in the airflow passing through the opening to become more charged, ensuring subsequent adsorption of these charged particles. Specifically, the discharge needle 4 charges the passing particles by ionizing surrounding air ions. Of course, the above description is not limiting; in some alternative embodiments, the discharge needle and opening may not be configured in a one-to-one correspondence.

[0038] like Figure 1 As shown, in this embodiment, the opening includes: a round hole, a square hole, and / or a perforated hole. Therefore, this embodiment does not limit the specific structure of the opening.

[0039] like Figure 1 As shown, in this embodiment, the aperture ratio on the metal perforated plate 3 is between 50% and 95%. This setting ensures uniform charge distribution without excessively increasing resistance. Of course, the above description is not limiting; in some alternative embodiments, the aperture ratio of the metal perforated plate can also be other values.

[0040] like Figure 1 As shown, in this embodiment, the discharge needle 4 is fixed to the printed circuit board strip. This arrangement facilitates the supply of power to the discharge needle 4. Specifically, the discharge needle 4 can be made of various metal materials. The discharge needle 4 can be fixed to the printed circuit board strip by soldering, with each discharge needle 4 corresponding one-to-one with an opening in each metal via plate 3, and pointing perpendicularly to the geometric center of the opening. Of course, the above description is not limiting. In some alternative embodiments, the discharge needle can also be fixed to other support structures and then connected to a power source using wires.

[0041] like Figure 1As shown, in this embodiment, the pre-filter 2 can be made of non-woven fabric, metal mesh, glass fiber, etc., which can intercept large particles and reduce clogging of subsequent filtration components. Of course, the above description is not limiting. In some alternative embodiments, the pre-filter can also be made of other materials with a resistance ≤30 Pa at a wind speed of 2 m / s.

[0042] like Figure 1 As shown, in this embodiment, the medium-efficiency filter element 5 includes: an upstream metal mesh 6, a downstream metal mesh 7, and a central material 8 sandwiched between the upstream metal mesh 6 and the downstream metal mesh 7. The upstream metal mesh 6 is connected to the positive terminal of the power supply and is spaced 1-3 cm apart from the central material 8. The downstream metal mesh 7 is grounded and is in contact with the central material 8. The electric field formed between the two metal meshes polarizes the central material 8. The central material 8 includes: nanofibers, meltblown fabric, etc. Of course, the above description is not limiting. In some alternative embodiments, the central material can also be other materials with a resistance ≤60 Pa at a wind speed of 2 m / s.

[0043] Furthermore, in some specific embodiments, the resistance of the medium-efficiency filter element 5 is 5-20 Pa at an air velocity of 5.33 cm / s, and the resistance of the pleated device is ≤60 Pa at an air velocity of 2 m / s. Through these settings, the noise problem of the air purifier can be further improved.

[0044] This embodiment combines a pre-filter 2 and a medium-efficiency filter 5 in series with polarized discharge to reduce system resistance by 5%-10% while maintaining filtration efficiency. This reduces the purifier's rotational speed and consequently lowers noise. In other words, the noise-reducing air purifier provided in this embodiment saves energy due to reduced wind resistance and lower fan speed.

[0045] Working principle:

[0046] Particulate matter enters the airflow channel of the housing 1 with the airflow. The particulate matter first passes through the primary filter element 2, which intercepts large-sized particulate matter. The remaining particulate matter is charged in the discharge area and then attracted by the opposite charge on the filter screen in the polarization area, thus being captured on the polarization filter screen.

[0047] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A noise-reducing air purifier, characterized in that, include: A housing (1) having an airflow channel inside; A filter element filtration device and a discharge filtration device are sequentially arranged in the airflow channel, with the filter element filtration device located upstream of the discharge filtration device. The filter element filtration device includes a primary filter element (2), and the resistance of the primary filter element (2) at a wind speed of 2m / s is ≤30Pa; The discharge filtration device includes a discharge device and a medium-efficiency filter element (5), wherein the resistance of the medium-efficiency filter element (5) is ≤60Pa at a wind speed of 2m / s.

2. The noise-reducing air purifier according to claim 1, characterized in that, The discharge device includes a metal perforated plate (3) and a discharge needle (4). The metal perforated plate (3) has several openings, and the discharge needle (4) is perpendicular to the openings of the metal perforated plate (3).

3. The noise-reducing air purifier according to claim 2, characterized in that, The discharge needle (4) is set in a one-to-one correspondence with the opening.

4. The noise-reducing air purifier according to claim 2, characterized in that, The opening includes: round hole, square hole and / or flower hole.

5. The noise-reducing air purifier according to claim 2, characterized in that, The perforation rate on the metal perforated plate (3) is between 50% and 95%.

6. The noise-reducing air purifier according to claim 2, characterized in that, The discharge needle (4) is fixed on the printed circuit board strip.

7. The noise-reducing air purifier according to claim 1, characterized in that, The primary filter element (2) comprises: non-woven fabric, metal mesh and / or glass fiber.

8. The noise-reducing air purifier according to claim 1, characterized in that, The medium-efficiency filter element (5) includes: an upstream metal mesh (6), a downstream metal mesh (7), and a central material (8) sandwiched between the upstream metal mesh (6) and the downstream metal mesh (7).

9. The noise-reducing air purifier according to claim 8, characterized in that, The central material (8) includes: nanofibers and / or meltblown fabric.

10. The noise-reducing air purifier according to any one of claims 1-9, characterized in that, The medium-efficiency filter element (5) has a resistance of 5-20 Pa at a wind speed of 5.33 cm / s.

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