Foot pad, compressor, air conditioner and active control method

Abstract

The invention discloses a foot pad, a compressor, an air conditioner and an active control method, the foot pad comprises a flexible support body, an electromagnet and a permanent magnet, the electromagnet and the permanent magnet are arranged on the flexible support body, the electromagnet and the permanent magnet are oppositely arranged up and down, and when the electromagnet is electrified, the magnetism of the electromagnet and the permanent magnet is in a mutual exclusion relationship. By arranging the electromagnet and the permanent magnet, when the electromagnet is not powered on, the electromagnet is non-magnetic, the electromagnet makes contact with the permanent magnet due to the fact that the flexible supporting body is soft, and the weight pressure borne by the foot pad enables the electromagnet to make contact with the permanent magnet, so that the rigidity requirement of the foot pad is met; therefore, the requirement for flexibility of the foot pad is met, and the problem that noise is too large when equipment runs is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a foot pad, a compressor, an air conditioner and an active control method. Background Art

[0002] With the development of the economy and the improvement of the quality of life, consumers have higher and higher requirements for the quality of indoor air-conditioning noise. However, the outdoor unit of the air conditioner will produce abnormal noise under certain working conditions. This noise has the characteristics of low frequency and high intensity, which will seriously affect the user's experience and physical and mental health. Through the experience and noise experimental testing of the abnormal noise of the outdoor unit of the air conditioner, it was found that the abnormal noise on the back of the outdoor unit is the most obvious. This noise fluctuates at a lower frequency in terms of hearing. Compared with the regular noise of the outdoor unit of the air conditioner, the intensity variation range of the abnormal noise is larger and the frequency of change is lower. It is easier to be captured by the human ear and cause discomfort to the user.

[0003] By analyzing a large amount of noise data from air conditioner outdoor units, it was found that reducing the noise of the compressor can significantly improve the hearing of abnormal noise, or even completely eliminate it. In the optimization plan proposed for compressor noise, reducing the stiffness of the compressor foot pad can significantly reduce abnormal noise, and the hearing is no longer unacceptable. However, although reducing the stiffness of the foot pad ensures the sound quality of the outdoor unit, it cannot guarantee the stiffness requirements during transportation, which may cause large deformation and damage to the pipeline, collision damage to the pipeline, and even compressor collision with sheet metal parts, causing deformation of sheet metal parts.

[0004] The Chinese patent with publication number CN 113565735A proposes a vibration-damping pad for a compressor, in which the pad material can change from a glassy state to a highly elastic state as the temperature changes. Therefore, the stiffness of the pad can be changed in real time through temperature control to ensure the stability of compression. However, the temperature variation range of the material is limited, and only a heating device is provided inside the pad. If the external unit is in a high temperature environment, the temperature regulation system will fail. The Chinese patent with publication number CN 110986188A proposes a variable stiffness pad, which is composed of a spring filled with a magnetorheological elastomer and a permanent magnet. The stiffness of the spring is controlled in real time by arranging a demagnetization system on the surface of the permanent magnet. This solution can ensure both the stiffness of the pad during transportation and the flexibility of the pad during operation of the external unit. However, the process of this solution is relatively complicated and the assembly is difficult. Summary of the invention

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a foot pad, a compressor, an air conditioner and an active control method, which aim to ensure the stiffness requirements of the foot pad during transportation while avoiding the problem of excessive noise during equipment operation.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a foot pad, comprising:

[0008] A flexible support body;

[0009] An electromagnet, disposed on the flexible support;

[0010] A permanent magnet is disposed on the flexible support body;

[0011] The electromagnet and the permanent magnet are arranged vertically opposite to each other. When the electromagnet is energized, the magnetism of the electromagnet and the permanent magnet are in a mutually repulsive relationship.

[0012] Furthermore, it also includes an elastic support member, which is arranged on the flexible support body. When the electromagnet is not energized, the elastic support member is compressed, and the electromagnet is in magnetic attraction contact with the permanent magnet.

[0013] Furthermore, the flexible support body is provided with an installation cavity, the elastic support member is arranged in the installation cavity, the electromagnet is connected to the top wall of the installation cavity, and the permanent magnet is connected to the bottom wall of the installation cavity, or the electromagnet is connected to the bottom wall of the installation cavity, and the permanent magnet is connected to the top wall of the installation cavity.

[0014] Furthermore, a side opening communicating with the installation cavity is provided on a side surface of the flexible support body.

[0015] Furthermore, a pressure sensor is provided on the permanent magnet, and the contact state between the electromagnet and the permanent magnet is determined by the pressure sensor.

[0016] Furthermore, the electromagnet includes a metal coil and a metal cylinder, and the metal coil is wound around the surface of the metal cylinder.

[0017] Furthermore, a groove is provided on the upper surface of the permanent magnet, and when the electromagnet is not energized, one end of the metal cylinder is embedded in the groove.

[0018] In a second aspect, the present invention further provides a compressor, comprising the above-mentioned foot pad.

[0019] In a third aspect, the present invention further provides an air conditioner, comprising the above-mentioned compressor.

[0020] In a fourth aspect, the present invention further provides an active control method of a foot pad, comprising:

[0021] During the operation of the equipment, the status of the pressure sensor of the equipment's foot pad is monitored in real time;

[0022] When the pressure sensor of the foot pad detects that the electromagnet is in contact with the permanent magnet, the current of the electromagnet is increased so that the electromagnet and the permanent magnet remain separated from each other in a mutually exclusive relationship.

[0023] Compared with the prior art, the present invention has the following beneficial effects: a foot pad, comprising a flexible support body, an electromagnet and a permanent magnet, wherein the electromagnet and the permanent magnet are arranged on the flexible support body, and the electromagnet and the permanent magnet are arranged relatively up and down, and when the electromagnet is energized, the magnetism of the electromagnet and the permanent magnet are in a mutually exclusive relationship. By setting the electromagnet and the permanent magnet, when the electromagnet is not energized, the electromagnet is non-magnetic, and because the flexible support body is soft, the weight pressure borne by the foot pad causes the electromagnet and the permanent magnet to contact, thereby ensuring the rigidity requirement of the foot pad, and when the electromagnet is energized and the current of the electromagnet increases to a certain extent, the electromagnet is separated from the permanent magnet, thereby ensuring the flexibility requirement of the foot pad and avoiding the problem of excessive noise when the equipment is running.

[0024] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following preferred embodiments are specifically cited and described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the structure of a foot pad provided by a specific embodiment of the present invention;

[0027] Figure 2 A cross-sectional view of a foot pad provided in a specific embodiment of the present invention;

[0028] Figure 3 A schematic structural diagram of a foot pad provided by a specific embodiment of the present invention from another perspective;

[0029] Figure 4 A schematic diagram of the structure of a compressor provided by a specific embodiment of the present invention;

[0030] Figure 5 A schematic structural diagram of a compressor from another perspective provided by a specific embodiment of the present invention;

[0031] Figure 6 The present invention provides a flowchart of an active control method of a foot pad according to a specific embodiment of the present invention.

[0032] Reference numerals

[0033] 1. Foot pad; 11. Flexible support body; 111. Installation cavity; 112. Side opening; 12. Electromagnet; 121. Metal cylinder; 122. Metal coil; 13. Permanent magnet; 131. Pressure sensor; 14. Elastic support member;

[0034] 2. Compressor;

[0035] 3. Anchor bolts. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0042] The foot pad of the present invention can be applied to fields such as air-conditioning compressors or air source heat pumps, and a specific description will be given below using the application in an air-conditioning compressor as an example.

[0043] See also Figures 1 to 5 An embodiment of the present invention provides a foot pad 1, including a flexible support body 11, an electromagnet 12 and a permanent magnet 13. The electromagnet 12 and the permanent magnet 13 are arranged on the flexible support body 11, and the electromagnet 12 and the permanent magnet 13 are arranged relatively to each other up and down. When the electromagnet 12 is energized, the magnetism of the electromagnet 12 and the permanent magnet 13 are in a mutually repulsive relationship.

[0044] The flexible support body 11 is made of rubber, silicone or TPE material, and has good flexibility and recovery. Considering the cost and manufacturing aspects, the flexible support body 11 is made of an integrated manufacturing method. The permanent magnet 13 is made of neodymium iron boron material, and the shape can be cylindrical, square or triangular, etc.

[0045] Through the above structure, when the electromagnet 12 is not energized, the electromagnet 12 is non-magnetic, and due to the flexible characteristics of the flexible support body 11, the weight of the compressor 2 will compress the flexible support body 11, thereby causing the electromagnet 12 and the permanent magnet 13 to be in magnetic contact. Since both the electromagnet 12 and the permanent magnet 13 are rigid, after contact, the rigidity of the foot pad 1 is ensured, meeting the rigidity requirements of the air conditioner for the foot pad 1 during transportation and installation. When the electromagnet 12 is energized and the current increases to a certain level, the electromagnet 12 and the permanent magnet 13 are separated due to magnetic repulsion, so that the foot pad 1 restores its soft characteristics, meeting the air conditioner's requirements for the flexibility of the foot pad 1 during operation, and avoiding the problem of excessive noise during operation of the air conditioner.

[0046] It should be noted that the mutual repulsion relationship between the magnetism of the electromagnet 12 and the permanent magnet 13 can be achieved by controlling the direction of the current in the electromagnet 12 to ensure that the electromagnet 12 and the permanent magnet are in a relationship of having the same poles relative to each other, thereby ensuring mutual repulsion. In addition, the control of the current magnitude and polarity of the electromagnet 12 can be achieved through a control circuit or a controller, and the specific control principle belongs to the prior art and will not be described in detail here.

[0047] See also Figures 1 to 3 The foot pad 1 further includes an elastic support member 14 , which is disposed on the flexible support body 11 . When the electromagnet 12 is not energized, the elastic support member 14 is compressed, and the electromagnet 12 is in magnetic attraction contact with the permanent magnet 13 .

[0048] The elastic support member 14 is in the form of a compression spring, and the material is high-strength stainless steel. When the electromagnet 12 is not energized, the electromagnet 12 is non-magnetic, the elastic support member 14 is compressed, and the electromagnet 12 and the permanent magnet 13 are in contact with each other through magnetic attraction. In this state, the foot pad 1 has a high degree of stability and a strong load-bearing capacity. When it is necessary to change the softness of the foot pad 1 or to perform vibration buffering, the electromagnet 12 is energized, and the electromagnetic force generated is in a mutually exclusive relationship with the permanent magnet 13. The electromagnetic force and the permanent magnet 13 are in a separated state, and the overall stiffness of the foot pad 1 is reduced, which improves the flexibility of the foot pad 1, meets the flexibility requirements of the air conditioner during operation, and avoids the problem of excessive noise when the air conditioner is running.

[0049] See also Figure 2 The flexible support body 11 is provided with an installation cavity 111, the elastic support member 14 is arranged in the installation cavity 111, the electromagnet 12 is connected to the top wall of the installation cavity 111, and the permanent magnet 13 is connected to the bottom wall of the installation cavity 111, or the electromagnet 12 is connected to the bottom wall of the installation cavity 111, and the permanent magnet 13 is connected to the top wall of the installation cavity 111.

[0050] By setting the installation groove, there is no need to set up additional components to fix the electromagnet 12 and the permanent magnet, which saves installation space, avoids displacement or loosening during use, and can avoid the influence of the outside world on the magnetism of the permanent magnet, thereby improving the overall stability and durability of the foot pad 1.

[0051] Specifically, the electromagnet 12 includes a metal coil 122 and a metal cylinder 121. The metal coil 122 is wound around the surface of the metal cylinder 121, and the metal coil 122 is composed of a current-carrying wire. In this embodiment, a mounting groove is provided at the center of the top wall of the mounting cavity 111 and the bottom wall of the mounting cavity 111. The metal cylinder 121 of the electromagnet 12 is fixedly mounted in the mounting groove of the top wall of the mounting cavity 111, and the permanent magnet 13 is fixedly mounted in the mounting groove of the bottom wall of the mounting cavity 111. The fixing method may be bonding or clamping.

[0052] The elastic support member 14 is axially arranged and located on the periphery of the metal coil 122 and the permanent magnet 13. When the electromagnet 12 is not energized, the electromagnet 12 is non-magnetic, and due to the flexible characteristics of the flexible support body 11, the weight of the compressor 2 will compress the flexible support body 11, and then the elastic support member 14 is axially compressed. At this time, the upper end of the elastic support member 14 abuts against the top wall of the installation cavity 111, and the lower end of the elastic support member 14 abuts against the bottom wall of the installation cavity 111. The elastic support member 14 provides auxiliary supporting force, and at the same time, the electromagnet 12 and the permanent magnet 13 are magnetically attracted to each other. Since the electromagnet 12 and the permanent magnet 13 are both rigid, after contact, the rigidity of the foot pad 1 is ensured, which meets the rigidity requirements of the foot pad 1 during transportation and installation of the air conditioner. When the electromagnet 12 is energized and the current increases to a certain level, the electromagnet 12 and the permanent magnet 13 are separated due to magnetic repulsion, so that the foot pad 1 regains its softness, meeting the flexibility requirement of the foot pad 1 during the operation of the air conditioner and avoiding the problem of excessive noise during the operation of the air conditioner.

[0053] In one embodiment, a groove (not shown) is provided on the upper surface of the permanent magnet 13, and one end of the metal cylinder 121 is embedded in the groove when the electromagnet 12 is not energized. Such a design can enhance the support capability of the foot pad 1 against the lateral vibration of the compressor 2.

[0054] In order to improve the stability and reliability of the installation of the elastic support member 14, bosses are provided on the top wall of the installation cavity 111 and the bottom wall of the installation cavity 111, an upper annular groove is formed between the boss of the top wall of the installation cavity 111 and the side wall of the installation cavity 111, and a lower annular groove is formed between the boss of the bottom wall of the installation cavity 111 and the side wall of the installation cavity 111, the upper end of the elastic support member 14 is embedded and installed in the upper annular groove, and the lower end of the elastic support member 14 is embedded and installed in the lower annular groove. With such a design, the upper annular groove and the lower annular groove can limit the two ends of the elastic support member 14, avoiding the problem of lateral displacement of the elastic support member 14 when it is compressed.

[0055] See also Figure 3 The side of the flexible support body 11 is provided with a side opening 112 which is connected with the installation cavity 111. Such a design facilitates the installation of components such as the electromagnet 12, the permanent magnet 13 and the elastic support member 14 in the installation cavity 111, thereby improving the feasibility and convenience of installation.

[0056] See also Figure 1 A pressure sensor 131 is provided on the permanent magnet 13, and the contact state between the electromagnet 12 and the permanent magnet 13 is determined by the pressure sensor 131, so that the current in the metal coil 122 of the electromagnet 12 can be adjusted according to actual conditions.

[0057] When the air conditioner is started, the current in the metal coil 122 of the electromagnet 12 of each foot pad 1 is gradually increased, and the contact relationship between the metal cylinder 121 and the permanent magnet is determined by the pressure sensor 131 on the surface of the permanent magnet. When the pressure sensor 131 can detect the pressure value, it indicates that the metal cylinder 121 is in contact with the permanent magnet, and the current of the metal coil 122 needs to be further increased. When the pressure sensor 131 cannot detect the pressure value, it indicates that the metal cylinder 121 is separated from the permanent magnet. At this time, the current of the metal coil 122 is stabilized at the current value, thereby ensuring the flexibility of the foot pad 1 during the operation of the air conditioner and avoiding the problem of excessive noise during the operation of the air conditioner.

[0058] See also Figures 4 to 5 The embodiment of the present invention further provides a compressor 2, comprising the above-mentioned foot pad 1.

[0059] In actual applications, a plurality of foot pads 1 are generally provided at the bottom of the main body of the compressor 2. Due to the eccentric characteristics of the compressor 2, the currents of the plurality of foot pads 1 are different. However, the electromagnet 12 of each foot pad 1 can be controlled by the current of the metal coil 122 to be in a state just away from the permanent magnet, thereby achieving the purpose of making the compression amount of each foot pad 1 the same, and further increasing the stability of the operation of the compressor 2.

[0060] See also Figure 4 In order to facilitate the fixing of the entire foot pad 1, a mounting hole is opened at the bottom center of the flexible support body 11, so that the entire foot pad 1 can be fixed by using anchor bolts 3.

[0061] It should be noted that, except for the above-mentioned foot pad 1, the remaining structures of the compressor 2 can be the same as those in the prior art, and the remaining structures will not be described in detail here.

[0062] The embodiment of the present invention further provides an air conditioner, comprising the above-mentioned compressor 2. Except for the above-mentioned compressor 2, the remaining structures of the air conditioner can be the same as those in the prior art, and the remaining structures will not be described in detail here.

[0063] See also Figure 6 , an embodiment of the present invention further provides an active control method of a foot pad, comprising the following steps: S10-S20.

[0064] S10. During the operation of the device, the status of the pressure sensor 131 of the foot pad 1 of the device is monitored in real time.

[0065] S20, when the pressure sensor 131 of the foot pad 1 detects that the electromagnet 12 is in contact with the permanent magnet 13, the current of the electromagnet 12 is increased so that the electromagnet 12 and the permanent magnet 13 remain separated from each other in a mutually exclusive relationship.

[0066] For steps S10-S20, during the operation of the air conditioner, the state of the pressure sensor 131 of each foot pad 1 needs to be detected in real time. When the pressure sensor 131 detects that the metal cylinder 121 is in contact with the permanent magnet, the current of the metal coil 122 is increased to ensure that the metal cylinder 121 is separated from the permanent magnet 13, thereby maintaining the flexibility of the foot pad 1 of the compressor 2 and the stability of the compressor 2, reducing the noise of the compressor 2, and preventing abnormal noise from being generated.

[0067] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A foot pad, characterized in that: include: A flexible support body; An electromagnet, disposed on the flexible support; A permanent magnet is disposed on the flexible support body; The electromagnet and the permanent magnet are arranged vertically opposite to each other. When the electromagnet is energized, the magnetism of the electromagnet and the permanent magnet are in a mutually repulsive relationship.

2. A foot pad according to claim 1, characterized in that: It also includes an elastic support member, which is arranged on the flexible support body. When the electromagnet is not energized, the elastic support member is compressed, and the electromagnet is in magnetic attraction and adsorption contact with the permanent magnet.

3. A foot pad according to claim 2, characterized in that: The flexible support body is provided with an installation cavity, the elastic support member is arranged in the installation cavity, the electromagnet is connected to the top wall of the installation cavity, the permanent magnet is connected to the bottom wall of the installation cavity, or the electromagnet is connected to the bottom wall of the installation cavity, and the permanent magnet is connected to the top wall of the installation cavity.

4. A foot pad according to claim 3, characterized in that: A side opening which is in communication with the installation cavity is provided on the side surface of the flexible support body.

5. The foot pad according to claim 1, characterized in that: A pressure sensor is provided on the permanent magnet, and the contact state between the electromagnet and the permanent magnet is determined by the pressure sensor.

6. The foot pad according to claim 1, characterized in that: The electromagnet comprises a metal coil and a metal cylinder, wherein the metal coil is wound around the surface of the metal cylinder.

7. A foot pad according to claim 6, characterized in that: A groove is provided on the upper surface of the permanent magnet, and when the electromagnet is not energized, one end of the metal cylinder is embedded in the groove.

8. A compressor, characterized in that: The invention comprises a foot pad as described in any one of claims 1 to 7.

9. An air conditioner, characterized in that: Comprising the compressor as claimed in claim 8.

10. An active control method for a foot pad, characterized in that: include: During the operation of the equipment, the status of the pressure sensor of the equipment's foot pad is monitored in real time; When the pressure sensor of the foot pad detects that the electromagnet is in contact with the permanent magnet, the current of the electromagnet is increased so that the electromagnet and the permanent magnet remain separated from each other in a mutually exclusive relationship.

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