A formaldehyde purification system

Abstract

The present invention discloses a formaldehyde purification system, comprising a first mechanism and a second mechanism. The first mechanism is provided with a formaldehyde purification membrane, and the second mechanism is spaced apart from the first mechanism. One end of the formaldehyde purification membrane extends from the first mechanism and is connected to the second mechanism, so that a filter membrane segment is deployed between the first and second mechanisms. When the second mechanism is in a second state, the filter membrane segment between the first and second mechanisms moves toward the second mechanism and is fixed to the second mechanism. The remaining formaldehyde purification membrane on the first mechanism then deploys between the first and second mechanisms to form a new filter membrane segment. Compared with existing technical solutions, the formaldehyde purification system of the present invention can more quickly replace failed formaldehyde purification membranes, reduce the number of times the air conditioner needs to be disassembled and assembled to replace filters, and improve the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a formaldehyde purification system. Background Art

[0002] Air conditioner, also known as air conditioner, is a device used to change the air temperature in a designated area (usually a closed space).

[0003] Formaldehyde is a flammable, colorless gas with a pungent odor. If the human body is exposed to an environment with excessive formaldehyde content for a long time, it will cause serious harm to the body.

[0004] To reduce formaldehyde levels in indoor environments, most existing air conditioners have been equipped with formaldehyde removal devices. However, since formaldehyde removal devices remove formaldehyde through filtration, when the filter element in the formaldehyde removal device fails, it needs to be replaced promptly, resulting in frequent disassembly and installation of the air conditioner, affecting the user experience. Summary of the Invention

[0005] The main purpose of the present invention is to provide a formaldehyde purification system, which aims to solve the technical problem that the filter elements in the formaldehyde purification device of the air conditioner in the prior art are easy to fail and need to be replaced frequently.

[0006] To achieve the above objectives, the present invention provides a formaldehyde purification system, comprising:

[0007] A first mechanism, wherein a formaldehyde purification membrane is provided on the first mechanism; and

[0008] A second mechanism is arranged opposite to and spaced from the first mechanism, wherein one end of the formaldehyde purification membrane extends from the first mechanism along a first direction and is connected to the second mechanism, so that an expanded filter membrane section is provided between the first mechanism and the second mechanism;

[0009] The second mechanism is configured to have a first state and a second state that are switchable with each other, and when the second mechanism is in the first state, the filter membrane segment between the first mechanism and the second mechanism is stationary;

[0010] When the second mechanism is in the second state, the filter membrane segment between the first mechanism and the second mechanism moves toward the second mechanism and is fixed on the second mechanism, and the remaining formaldehyde purification membrane on the first mechanism is then unfolded between the first mechanism and the second mechanism to form a new filter membrane segment.

[0011] In some embodiments of the present invention, the first mechanism is a first axial member that can rotate around its own central axis. The formaldehyde purification membrane is wound around the central axis of the first axial member, and one end of the formaldehyde purification membrane far from the central axis of the first axial member extends along the first direction and is connected to the second mechanism.

[0012] In some embodiments of the present invention, the second mechanism includes:

[0013] A second axial member that can rotate around its own central axis, and one end of the formaldehyde purification membrane is connected to the second axial member;

[0014] A driving motor connected to the second axial member, and the driving motor is used to drive the second axial member to rotate around its central axis so that the second axial member can gradually wind the formaldehyde purification membrane around the second axial member.

[0015] In some embodiments of the present invention, the length of the formaldehyde purification membrane is greater than the distance between the first mechanism and the second mechanism.

[0016] In some embodiments of the present invention, the formaldehyde purification membrane includes:

[0017] A membrane body;

[0018] A formaldehyde adsorption layer provided on the surface of the membrane body;

[0019] Ventilation holes that penetrate the membrane body and the formaldehyde adsorption layer along the second direction.

[0020] In some embodiments of the present invention, the formaldehyde adsorption layer is formed by coating a photocatalyst formaldehyde adsorbent on the surface of the membrane body.

[0021] In some embodiments of the present invention, the formaldehyde purification system further includes a first formaldehyde detection sensor and a control module. The first formaldehyde detection sensor is used to be arranged at the indoor air inlet of the air conditioner indoor unit. The control module is respectively connected to the first formaldehyde detection sensor and the second mechanism, and the control module is used to control the second mechanism to switch between the first state and the second state according to the detection result of the first formaldehyde detection sensor.

[0022] In some embodiments of the present invention, the formaldehyde purification system further includes a second formaldehyde detection sensor, which is used to be arranged at the air outlet of the air conditioner indoor unit. The second formaldehyde sensor is located on one side of the formaldehyde purification membrane facing away from the indoor air outlet. The second formaldehyde sensor is connected to the control module, and the control module is used to control the switching of the second mechanism between the first state and the second state according to the detection results of the first formaldehyde detection sensor and the second formaldehyde detection sensor.

[0023] In some embodiments of the present invention, the formaldehyde purification system further includes an indicator, which is used to be arranged outside the air conditioner indoor unit. The indicator is connected to the control module, and the control module is used to control the indicator to display the formaldehyde detection result of the first formaldehyde detection sensor.

[0024] In some embodiments of the present invention, the indicator is an electrochromic film, which is used to be arranged on the outer panel of the air conditioner indoor unit. The control module is used to control the electrochromic film to display different colors according to the formaldehyde detection result of the first formaldehyde detection sensor.

[0025] A formaldehyde purification system provided by the present invention is provided with a formaldehyde purification membrane on a first mechanism, so that there is a filter membrane section in the unfolded state between the first mechanism and a second mechanism, which is used to adsorb and purify formaldehyde in the gas at the air outlet. When the part of the formaldehyde purification membrane between the first mechanism and the second mechanism fails due to long-term adsorption of formaldehyde, the second mechanism switches to the second state, so that the old filter membrane section is transferred to the second mechanism. Along with the transfer of the formaldehyde adsorption membrane of this part, a new formaldehyde adsorption membrane moves to unfold between the first mechanism and the second mechanism to form a new filter membrane section for adsorbing and purifying formaldehyde, thereby realizing the rapid replacement of the failed formaldehyde purification membrane. Compared with the prior art solutions, the formaldehyde purification system of the present invention can replace the failed formaldehyde purification membrane relatively quickly, reduce the number of times of disassembling and assembling the air conditioner due to the need to replace the filter element, and improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of a specific application of the formaldehyde purification system of the present invention on an air conditioner indoor unit;

[0028] Figure 2 This is a schematic structural diagram of an embodiment of the formaldehyde purification system of the present invention.

[0029] Reference numerals: 100, the first mechanism; 101, the formaldehyde purification membrane; 200, the second mechanism; 201, the driving motor; 202, the second axial member; 300, the air conditioner indoor unit; 301, the indoor air outlet; 302, the outer panel; 303, the air deflector; 400, the indicating member. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0031] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0032] In the present invention, unless otherwise clearly defined and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes the A solution, the B solution, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0034] As shown Figure 1 in the figure, the present application provides a formaldehyde purification system, which is arranged at the indoor air outlet 301 of the air conditioner indoor unit 300. The formaldehyde purification system includes a first mechanism 100 and a second mechanism 200. A formaldehyde purification membrane 101 is arranged on the first mechanism 100. The second mechanism 200 is arranged opposite to the first mechanism 100. One end of the formaldehyde purification membrane 101 extends from the first mechanism 100 along the first direction and is connected to the second mechanism 200. The formaldehyde purification membrane 101 is in an unfolded state between the first mechanism 100 and the second mechanism 200, that is, the filter membrane section. The second mechanism 200 has a first state and a second state that can be switched with each other. When the second mechanism 200 is in the first state, the first mechanism 100, the formaldehyde purification membrane 101 and the second mechanism 200 are all in a static state. When the second mechanism 200 is in the second state, the second mechanism 200 moves to drive the formaldehyde purification membrane 101 to gradually transfer to the second mechanism 200 along the first direction, that is, the old filter membrane section moves towards the second mechanism 200 and is fixed on the second mechanism 200, and the remaining formaldehyde purification membrane 101 on the first mechanism 100 is unfolded between the first mechanism 100 and the second mechanism 200 to form a new filter membrane section

[0035] It should be noted that both the first mechanism 100 and the second mechanism 200 are arranged at the indoor air outlet 301 of the air conditioner indoor unit 300, and the first mechanism 100 and the second mechanism 200 are respectively arranged at both ends of the indoor air outlet 301 of the air conditioner indoor unit 300, so that the formaldehyde adsorption membrane unfolded between the first mechanism 100 and the second mechanism 200 covers the indoor air outlet 301 of the air conditioner indoor unit 300, so as to adsorb formaldehyde in the air flow flowing out of the air outlet of the air conditioner indoor unit 300 by the formaldehyde adsorption membrane

[0036] Wherein, the first direction is the direction from the first mechanism 100 to the second mechanism 200

[0037] The first mechanism 100 and the second mechanism 200 are arranged between the indoor air outlet 301 and the air deflector 303 of the air conditioner indoor unit 300

[0038] It can be understood that when the second mechanism 200 is in the first state, the first mechanism 100, the formaldehyde purification membrane 101 and the second mechanism 200 are all in a static state, then the part of the formaldehyde purification membrane 101 located between the first mechanism 100 and the second mechanism 200 remains stationary, and adsorbs formaldehyde in the air flow at the air outlet of the air conditioner

[0039] It can be understood that a formaldehyde purification membrane 101 is provided on the first mechanism 100, and the formaldehyde purification membrane 101 is in an unfolded state between the first mechanism 100 and the second mechanism 200, and is used for adsorbing and purifying formaldehyde in the gas at the air outlet. And there is enough length so that after a part of the formaldehyde purification membrane 101 fails, the other part can be used for adsorption. When the part of the formaldehyde purification membrane 101 between the first mechanism 100 and the second mechanism 200 fails due to long-term adsorption of formaldehyde, the second mechanism 200 switches to the second state, so that this part of the formaldehyde adsorption membrane is transferred to the second mechanism 200. As this part of the formaldehyde adsorption membrane is transferred, a new formaldehyde adsorption membrane moves between the first mechanism 100 and the second mechanism 200 to adsorb and purify formaldehyde, so as to quickly replace the failed formaldehyde purification membrane 101. Compared with the prior art solution, the formaldehyde purification system of the present invention can replace the failed formaldehyde purification membrane 101 relatively quickly, reduce the number of times of disassembling and assembling the air conditioner due to the need to replace the filter element, and improve the user experience.

[0040] Based on the above technical solution, the embodiments that those skilled in the art can further adopt are that the first mechanism 100 is a first axial member that can rotate around its own central axis, and the formaldehyde purification membrane 101 is wound around the central axis of the first axial member, and one end of the formaldehyde purification membrane 101 far from the central axis of the first axial member extends along the first direction and is connected to the second mechanism 200.

[0041] It can be understood that the formaldehyde purification membrane 101 with a preset length is wound around the first axial member, and the end of the outermost layer of the formaldehyde purification membrane 101 wound around the first axial member extends towards the second mechanism 200 and is connected to the second mechanism 200. When the second mechanism 200 switches to the second state, it drives the formaldehyde purification membrane 101 to move towards the second mechanism 200, and the first axial member rotates in cooperation to complete the transfer of the formaldehyde purification membrane 101.

[0042] Specifically, the first axial member is rotationally connected to the air conditioner indoor unit 300, and the formaldehyde purification membrane 101 is driven by the second mechanism 200 to move towards the second mechanism 200, and the first axial member rotates in cooperation to transfer the formaldehyde purification membrane 101 to the second mechanism 200.

[0043] In some embodiments, the first mechanism 100 further includes a driving device, and the driving device is connected to the first axial member and is used for driving the first axial member to rotate. When the formaldehyde purification membrane 101 is transferred to the second mechanism 200, the driving device drives the first axial member to rotate in cooperation with the second mechanism 200. When it is necessary to transfer the formaldehyde purification membrane 101 from the second mechanism 200 to the first mechanism 100, the driving device drives the first axial member to rotate in the reverse direction, so that the formaldehyde purification membrane 101 on the second mechanism 200 is transferred to the first axial member.

[0044] Based on the above technical solution, the implementation manners that those skilled in the art can further adopt are that the second mechanism 200 includes a second axial member 202 and a driving motor 201. The second axial member 202 can rotate around its own central axis. One end of the formaldehyde purification membrane 101 is connected to the second axial member 202. The driving motor 201 is connected to the second axial member 202, and the driving motor 201 is used to drive the second axial member 202 to rotate around its central axis, so that the second axial member 202 can drive the formaldehyde purification membrane 101 to gradually wind around the second axial member 202.

[0045] It can be understood that under the drive of the driving motor 201, the second mechanism 200 switches to the second state, that is, the driving motor 201 drives the second axial member 202 to rotate. Since one end of the formaldehyde purification membrane 101 is connected to the second axial member 202, as the second axial member 202 rotates, the formaldehyde purification membrane 101 gradually winds onto the second axial member 202. That is, by controlling the driving time of the driving motor 201, the length of the formaldehyde purification membrane 101 wound around the second axial member 202 can be controlled. For example, the length of the formaldehyde purification membrane 101 between the first axial member and the second axial member 202 is 20 cm, the circumference of the second axial member 202 is 4 cm, the speed of the driving motor 201 driving the second axial member 202 to rotate is 2 cm / s, and the driving motor 201 is controlled to drive the second axial member 202 to move for 10 s. The formaldehyde purification membrane 101 unfolded between the first axial member and the second axial member 202 is transferred onto the second axial member 202, and the formaldehyde purification membrane 101 on the first axial member then extends and unfolds between the first axial member and the second axial member 202.

[0046] In some embodiments, the first axial member is arranged in parallel with the second axial member 202. The first axial member and the second axial member 202 can be arranged at intervals along the length direction of the air outlet of the air conditioner indoor unit 300. Or the first axial member and the second axial member 202 can be arranged at intervals along the width direction of the air outlet of the air conditioner indoor unit 300.

[0047] In some embodiments, the length of the formaldehyde purification membrane 101 is greater than the distance between the first axial member and the second axial member 202. For example, the distance between the first axial member and the second axial member 202 is 20 cm, and the preset length of the formaldehyde purification membrane 101 arranged on the first axial member is 100 cm.

[0048] In some embodiments, the first axial member is detachably connected to the air conditioner indoor unit 300, which is convenient for updating the formaldehyde purification membrane 101 by replacing the entire first axial member.

[0049] In some embodiments, both the first axial member and the second axial member 202 are detachably connected to the air conditioner indoor unit 300, so that the formaldehyde purification membrane 101 can be replaced by replacing the first axial member or the second axial member 202 separately or simultaneously.

[0050] Based on the above technical solutions, further implementation manners that those skilled in the art can adopt are that the formaldehyde purification membrane 101 includes a membrane body, a formaldehyde adsorption layer, and ventilation holes. The formaldehyde adsorption layer is disposed on the surface of the membrane body. The ventilation holes penetrate through the membrane body and the formaldehyde adsorption layer along the second direction.

[0051] It should be noted that the second direction is the thickness direction of the membrane body and the formaldehyde adsorption layer, and the ventilation holes penetrate through the membrane body and the formaldehyde adsorption layer along their thickness direction.

[0052] In some embodiments, the ventilation holes are set as diamond-shaped holes. Since the ventilation holes on the formaldehyde purification membrane 101 are diamond-shaped holes, that is, a hollow shape with low wind resistance, they can have a turbulent flow effect on the air at the air outlet, which is beneficial to reducing the wind feeling, avoiding the direct blowing of the air from the air outlet to people, and having a gentle wind effect.

[0053] In some embodiments, the formaldehyde adsorption layer is formed by coating a photocatalyst formaldehyde adsorbent on the surface of the membrane body. The photocatalyst formaldehyde adsorbent can be coated only on the windward side of the membrane body. The photocatalyst formaldehyde adsorbent can also be coated on both the windward side and the leeward side of the membrane body. The photocatalyst formaldehyde adsorbent can be sprayed on the surface of the membrane body to form an air catalyst coating to continuously remove formaldehyde.

[0054] As Figure 2 shown, based on the above technical solutions, further implementation manners that those skilled in the art can adopt are that the formaldehyde purification system further includes a first formaldehyde detection sensor and a control module. The first formaldehyde detection sensor is disposed at the indoor air inlet of the air conditioner indoor unit 300. The control module is respectively connected to the first formaldehyde detection sensor and the second mechanism 200. The control module is used to control the state of the second mechanism 200 according to the detection result of the first formaldehyde detection sensor.

[0055] It should be noted that the first formaldehyde detection sensor is used to detect the formaldehyde concentration at the indoor air inlet and feedback the detected formaldehyde concentration data to the control module. The control module controls the second mechanism 200 to switch between the first state and the second state according to the formaldehyde concentration data fed back by the first formaldehyde detection sensor.

[0056] In some embodiments, when the air conditioner starts to operate, the first formaldehyde detection sensor detects the intake air at the indoor air inlet, and the detected formaldehyde concentration is denoted as K1; after the air conditioner has been running for a period of time, the first formaldehyde detection sensor detects the intake air at the indoor air inlet, and the detected formaldehyde concentration is denoted as K2; if K2 is less than K1, it is determined that the formaldehyde purification membrane 101 between the first mechanism 100 and the second mechanism 200 has not failed; if K2 = K1, it is determined that the formaldehyde purification membrane 101 between the first mechanism 100 and the second mechanism 200 has failed, and the control module controls the second mechanism 200 to switch to the second state, and updates the formaldehyde purification membrane 101 between the first mechanism 100 and the second mechanism 200.

[0057] Based on the above technical solution, further implementation manners that those skilled in the art can adopt are that the formaldehyde purification system further includes a second formaldehyde detection sensor. The second formaldehyde detection sensor is disposed at the air outlet of the indoor unit 300 of the air conditioner. The second formaldehyde sensor is located on the side of the formaldehyde purification membrane 101 away from the indoor unit 300 of the air conditioner. The second formaldehyde sensor is connected to the control module, and the control module is used to control the state of the second mechanism 200 according to the detection results of the first formaldehyde detection sensor and the second formaldehyde detection sensor.

[0058] In some embodiments, when the air conditioner is running or starting up, the formaldehyde concentration detected by the first formaldehyde detection sensor is denoted as K1, and the formaldehyde concentration detected by the second formaldehyde detection sensor is denoted as K2. When K2 = K1, it is controlled to determine that the formaldehyde adsorption membrane between the first mechanism 100 and the second mechanism 200 has failed, and the control module controls the second mechanism 200 to switch to the second state, and updates the failed formaldehyde adsorption membrane between the first mechanism 100 and the second mechanism 200.

[0059] Based on the above technical solution, further implementation manners that those skilled in the art can adopt are that the formaldehyde purification system further includes an indicator 400. The indicator 400 is disposed outside the indoor unit 300 of the air conditioner. The indicator 400 is connected to the control module, and the control module is used to control the indicator 400 to display the formaldehyde detection result of the first formaldehyde detection sensor.

[0060] It should be noted that according to the formaldehyde detection result of the first formaldehyde detection sensor, the indicator 400 is controlled to display different pictures or colors or values, so that by controlling the indicator 400 to display formaldehyde detection information through the control module, the user can be helped to have an intuitive understanding of the formaldehyde concentration in the living environment in a timely manner.

[0061] In some embodiments, the control module is used to control the indicator 400 to display the formaldehyde detection result of the second formaldehyde detection sensor.

[0062] In some embodiments, the indicator 400 is an electrochromic film, which is disposed on the outer panel 302 of the air conditioner indoor unit 300, and the control module controls the electrochromic film to display different colors according to the formaldehyde detection result of the first formaldehyde detection sensor.

[0063] In some embodiments, a preset formaldehyde concentration threshold M is set in the control module. The formaldehyde concentration M1 detected by the first formaldehyde detection sensor in real time. When M1 is greater than M, the control module controls the electrochromic film to display red; when M1 is equal to M, the control module controls the electrochromic film to display green; when M1 is less than M, the control module controls the electrochromic film to display green.

[0064] Specifically, the electrochromic film is directly bonded to the outer panel 302 of the air conditioner indoor unit 300. The electrochromic film disposed on the outer panel 302 can be in various shapes such as rectangular, circular or annular.

[0065] Specifically, the control module controls the display color of the electrochromic film by controlling the magnitude of the driving current of the electrochromic film. The greater the driving current of the electrochromic film, the deeper the extension of the electrochromic film.

[0066] In some embodiments, the electrochromic film can also adjust the display color according to the cooling temperature or heating temperature of the air conditioner. The control module adjusts the color of the electrochromic film according to the cooling or heating temperature of the air conditioner.

[0067] In some embodiments, the indicator 400 is a display screen, which is disposed on the outer panel 302 of the air conditioner indoor unit 300, and the control module controls the display screen to display the detected formaldehyde concentration value in real time.

[0068] According to the above embodiments, those skilled in the art can specifically apply any one or more of the above embodiments to the corresponding air conditioner devices.

[0069] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A formaldehyde purification system, used to be installed at the indoor air outlet of an air conditioner indoor unit, characterized in that: include: a first mechanism, wherein a formaldehyde purification membrane is provided on the first mechanism; as well as A second mechanism is arranged opposite to and spaced from the first mechanism, wherein one end of the formaldehyde purification membrane extends from the first mechanism along a first direction and is connected to the second mechanism, so that an expanded filter membrane section is provided between the first mechanism and the second mechanism; The second mechanism is configured to have a first state and a second state that are switchable with each other, and when the second mechanism is in the first state, the filter membrane segment between the first mechanism and the second mechanism is stationary; When the second mechanism is in the second state, the filter membrane segment between the first mechanism and the second mechanism moves toward the second mechanism and is fixed on the second mechanism, and the remaining formaldehyde purification membrane on the first mechanism then unfolds between the first mechanism and the second mechanism to form a new filter membrane segment; The formaldehyde purification membrane includes: a membrane body, a formaldehyde adsorption layer and ventilation holes, wherein the formaldehyde adsorption layer is arranged on the surface of the membrane body; the ventilation holes penetrate the membrane body and the formaldehyde adsorption layer along the second direction; and the ventilation holes are diamond-shaped holes.

2. The formaldehyde purification system according to claim 1, characterized in that: The first mechanism is a first axial member that can rotate around its own central axis. The formaldehyde purification membrane is wound around the central axis of the first axial member. One end of the formaldehyde purification membrane away from the central axis of the first axial member extends along the first direction and is connected to the second mechanism.

3. The formaldehyde purification system according to claim 2, characterized in that: The second mechanism includes: a second axial member, the second axial member being rotatable about its own central axis, one end of the formaldehyde purification membrane being connected to the second axial member; A drive motor is connected to the second axial member, and is used to drive the second axial member to rotate around its central axis, so that the second axial member drives the formaldehyde purification membrane to gradually wind around the second axial member.

4. The formaldehyde purification system according to claim 1, characterized in that: The length of the formaldehyde purification membrane is greater than the distance between the first structure and the second structure.

5. The formaldehyde purification system according to claim 1, characterized in that: The formaldehyde adsorption layer is formed by coating a photocatalyst formaldehyde adsorbent on the surface of the film body.

6. The formaldehyde purification system according to claim 1, characterized in that: The formaldehyde purification system also includes a first formaldehyde detection sensor and a control module. The first formaldehyde detection sensor is used to be set at the indoor air inlet of the air conditioner indoor unit. The control module is connected to the first formaldehyde detection sensor and the second mechanism respectively. The control module is used to control the second mechanism to switch between the first state and the second state according to the detection result of the first formaldehyde detection sensor.

7. The formaldehyde purification system according to claim 6, characterized in that: The formaldehyde purification system also includes a second formaldehyde detection sensor, which is used to be set at the air outlet of the air conditioner indoor unit. The second formaldehyde detection sensor is located on the side of the formaldehyde purification membrane facing away from the indoor air outlet. The second formaldehyde detection sensor is connected to the control module, and the control module is used to control the second mechanism to switch between the first state and the second state according to the detection results of the first formaldehyde detection sensor and the detection results of the second formaldehyde detection sensor.

8. The formaldehyde purification system according to claim 6 or 7, characterized in that: The formaldehyde purification system further includes an indicator, which is arranged outside the air conditioner indoor unit and is connected to the control module. The control module is used to control the indicator to display the formaldehyde detection result of the first formaldehyde detection sensor.

9. The formaldehyde purification system according to claim 8, characterized in that: The indicator is an electrochromic film, which is used to be arranged on the outer panel of the air conditioner indoor unit. The control module is used to control the electrochromic film to display different colors according to the formaldehyde detection result of the first formaldehyde detection sensor.

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