Compressor damping foot pad, compressor device and refrigeration equipment

Abstract

The invention provides a compressor vibration reduction foot pad, a compressor device and refrigeration equipment. The compressor vibration reduction foot pad comprises a control circuit, a foot pad tray and a piezoelectric plate device. The piezoelectric plate device is installed on the top of the foot pad tray and used for abutting against the bottom of the compressor. The control circuit is electrically connected with the piezoelectric plate device and used for controlling the inherent frequency of a piezoelectric plate in the piezoelectric plate device to be matched with the vibration frequency of the compressor. By means of the compressor damping foot pad, the damping performance can be improved, and meanwhile noise is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular, to a compressor damping foot pad, further relates to a compressor device applying the compressor damping foot pad, and further relates to a refrigeration equipment applying the compressor device. BACKGROUND

[0002] In an air conditioner outdoor unit, the compressor as the main moving component will produce vibration noise problems, the vibration noise will be transmitted to the entire outdoor unit structure along the pipeline and the shell, and when the frequency of the compressor operation approaches the pipeline modal frequency value, at this time, serious vibration noise problems will occur, and the vibration of the pipeline will cause certain deformation to the structure, reducing the reliability of the system, therefore, the control of the compressor pipeline vibration noise problem is essential.

[0003] In the prior art, the commonly used methods to reduce pipeline vibration noise include increasing the pipeline weight to reduce the pipeline modal frequency, so that the compressor excitation frequency and the pipeline resonance frequency are staggered to avoid resonance, increasing the weight can solve part of the vibration noise problem, but it may cause resonance of other pipeline frequencies, and the reliability is not high, and the effect is not obvious.

[0004] Another method is to add materials with damping properties to the pipeline, such as rubber blocks, damping blocks, polyurethane and other materials with high elasticity, to consume the vibration energy of the pipeline, but the damping rubber pad will be affected by various factors during long-term exposure to the environment (such as temperature, light, humidity, etc.), causing the elastic molecular chain to break, the cross-linking structure to be damaged, or the material to age, resulting in the damping rubber pad hardening, losing its damping effect, and losing its original elasticity and softness. Secondly, wrapping the compressor pipeline system with a layer of sound insulation cotton can effectively reduce high-frequency noise, but as the service life of the air conditioner increases, the noise reduction performance of the sound insulation cotton will gradually decrease, and the sound insulation cotton has little effect on reducing low-frequency noise.

[0005] In a conventional compressor foot pad, a heating element is arranged on the foot pad main body, and a piezoelectric energy harvester is installed on the compressor main body to supply power to the heating element when the compressor main body is working, so that the heating element can heat the foot pad main body, thereby softening the foot pad main body and reducing the hardness of the foot pad. During the transportation of the compressor, the electric energy captured by the piezoelectric energy harvester is less than the electric energy during the operation of the compressor, thereby limiting the softening of the foot pad main body, thereby ensuring the hardness of the foot pad. The compressor foot pad assembly can meet the vibration damping requirements during operation and transportation, and the vibration damping effect is ensured. However, this scheme also has the disadvantage of not obvious vibration damping effect.

[0006] Therefore, a more optimized compressor foot pad needs to be considered. SUMMARY

[0007] The first object of the present application is to provide a compressor damping foot pad which can improve damping performance while reducing noise.

[0008] The second object of the present application is to provide a compressor device which can improve damping performance while reducing noise.

[0009] The third object of the present application is to provide a refrigeration equipment which can improve damping performance while reducing noise.

[0010] In order to achieve the above-mentioned first object, the compressor damping foot pad provided by the present application comprises a control circuit, a foot pad tray and a piezoelectric sheet device; the piezoelectric sheet device is installed on the top of the foot pad tray and is used to abut against the bottom of the compressor; the control circuit is electrically connected with the piezoelectric sheet device and is used to control the natural frequency of the piezoelectric sheet in the piezoelectric sheet device to match the vibration frequency of the compressor.

[0011] As can be seen from the above scheme, the compressor damping foot pad of the present application is provided with a piezoelectric sheet device, which is installed on the foot pad tray and abuts against the bottom of the compressor, and a control circuit is used to control the natural frequency of the piezoelectric sheet in the piezoelectric sheet device to match the vibration frequency of the compressor, so that the piezoelectric sheet generates vibration, the vibration frequency of the compressor is the same as the natural frequency of the piezoelectric sheet, structural resonance is achieved, the piezoelectric sheet vibration utilizes the positive piezoelectric effect to generate electric charge inside the piezoelectric sheet, thereby achieving dissipation of vibration energy and achieving damping effect, improving damping performance and reducing noise generation.

[0012] In a further scheme, the compressor damping foot pad further comprises an isolation layer, which covers the top of the foot pad tray, and the piezoelectric sheet device is installed on the isolation layer.

[0013] As can be seen from the above scheme, by setting the isolation layer, the compressor can be prevented from directly contacting the foot pad tray, the friction of the foot pad tray during the vibration of the compressor is reduced, and the service life of the foot pad tray is improved.

[0014] In a further scheme, the isolation layer is provided with a groove matched with the shape of the bottom of the compressor, and the piezoelectric sheet device is installed in the groove.

[0015] As can be seen from the above scheme, the isolation layer is provided with a groove matched with the shape of the bottom of the compressor, and the piezoelectric sheet device is installed in the groove, so that the bottom of the compressor can better fit the piezoelectric sheet device, thereby improving the damping effect.

[0016] In a further scheme, the piezoelectric sheet device is provided with a piezoelectric sheet array, and the piezoelectric sheets in the piezoelectric sheet array are uniformly arranged in the groove.

[0017] As can be seen from the above scheme, the piezoelectric sheet device adopts the piezoelectric sheet array mode, which can better control the vibration of each region and improve the damping effect.

[0018] In a further aspect, the isolation layer is a metal isolation layer.

[0019] In a further aspect, the foot pad tray is made of rubber.

[0020] In a further aspect, the foot pad tray is made of rubber.

[0021] In a further aspect, the foot pad tray is made of rubber.

[0022] In a further aspect, the foot pad tray is made of rubber.

[0023] In a further aspect, the foot pad tray is made of rubber.

[0024] In a further aspect, the foot pad tray is made of rubber.

[0025] In a further aspect, the foot pad tray is made of rubber.

[0026] In a further aspect, the foot pad tray is made of rubber.

[0027] In a further aspect, the foot pad tray is made of rubber.

[0028] In a further aspect, the foot pad tray is made of rubber.

[0029] In a further aspect, the foot pad tray is made of rubber.

[0030] In a further aspect, the foot pad tray is made of rubber.

[0031] To achieve the second object of the present application, the compressor device provided by the present application comprises a compressor and a compressor damping foot pad, the compressor is installed on the compressor damping foot pad, the compressor damping foot pad uses the compressor damping foot pad described above; and a support is connected with the compressor.

[0032] To achieve the third object of the present application, the refrigeration equipment provided by the present application is provided with a compressor device, and the compressor device uses the compressor device described above. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 is the installation structure diagram of the compressor device in the refrigeration equipment embodiment of the present application.

[0034] Figure 2 is the structure perspective view of the compressor damping foot pad in the refrigeration equipment embodiment of the present application.

[0035] Figure 3 is the installation structure diagram of the foot pad tray and the support in the refrigeration equipment embodiment of the present application.

[0036] Figure 4 is Figure 1 is the enlarged view of A in FIG. 8.

[0037] Figure 5 is the structure sectional view of the compressor damping foot pad in the refrigeration equipment embodiment of the present application.

[0038] Figure 6 is the installation structure perspective view of the support and the air pressure cavity in the refrigeration equipment embodiment of the present application.

[0039] Figure 7 is the structure perspective view of the air pressure cavity in the refrigeration equipment embodiment of the present application.

[0040] Figure 8 is the structure view of the isolation layer in the refrigeration equipment embodiment of the present application.

[0041] Figure 9 is the installation structure diagram of the isolation layer and the piezoelectric sheet device in the refrigeration equipment embodiment of the present application.

[0042] The present application is further described below in combination with the drawings and embodiments. DETAILED DESCRIPTION

[0043] Various exemplary embodiments of the invention will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the invention or its application or use. The invention can be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the invention thorough and complete, and to fully express the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0044] The terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, without excluding the possibility of encompassing other elements. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0045] In this invention, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0046] All terms used in this invention (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having the meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0047] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0048] Refrigeration equipment example:

[0049] like Figure 1 As shown, in this embodiment, the refrigeration equipment is equipped with a compressor unit. The refrigeration equipment can be an air conditioner or a refrigerator, etc., which require refrigeration. In this embodiment, the refrigeration equipment is an air conditioner. The compressor unit includes a compressor vibration damping pad 1 and a compressor 2, with the compressor 2 mounted on the compressor vibration damping pad 1.

[0050] In this embodiment, referring to Figure 2 and Figure 3 , the compressor damping foot pad 1 comprises a control circuit (not shown), a foot pad tray 11, three or more than three support members 12 and a piezoelectric sheet device 13, the three or more than three support members 12 are evenly installed on the top of the foot pad tray 11 along the circumference of the foot pad tray 11, and the three or more than three support members 12 enclose a compressor accommodating position. The piezoelectric sheet device 13 is installed in the area of the foot pad tray 11 located in the compressor accommodating position, and the piezoelectric sheet device 13 is used to abut against the bottom of the compressor 2. The control circuit is electrically connected with the piezoelectric sheet device 13, and the control circuit is used to control the natural frequency of the piezoelectric sheet in the piezoelectric sheet device 13 to match the vibration frequency of the compressor 2. The foot pad tray 11 is made of rubber, and the damping effect can be improved by using rubber to make the foot pad tray 11. The number of support members 12 can be set according to the needs, and preferably, the number of support members 12 is three. The support member 12 is detachably connected with the outer side wall of the compressor 2. In this embodiment, a clamping groove 121 is arranged on the outer circumferential wall of the support member 12, referring to Figure 4 , and the outer side wall of the compressor 2 is provided with an ear part 21, and the ear part 21 is clamped in the clamping groove 121.

[0051] In this embodiment, referring to Figure 5 , the corresponding area of the foot pad tray 11 where the piezoelectric sheet device 13 is installed is provided with a refrigerant isolation layer 112, and the refrigerant isolation layer 112 is located inside the foot pad tray 11. By arranging the refrigerant isolation layer 112 inside the foot pad tray 11, the heat dissipation performance of the structure of the compressor 2 can be improved, and at the same time, the vibration attenuation performance of the bottom of the compressor 2 can also be improved. Preferably, the refrigerant in the refrigerant isolation layer 112 is a water-based antifreeze of ethylene glycol.

[0052] In this embodiment, referring to Figure 6 , a gas pressure cavity 113 is arranged at the connecting position of the foot pad tray 11 and the support member 12, the gas pressure cavity 113 is located inside the foot pad tray 11, and the gas pressure cavity 113 is arranged along the circumference of the support member 12. By arranging the gas pressure cavity 113 at the connecting position of the foot pad tray 11 and the support member 12, and by using the vibration attenuation characteristics of the gas pressure cavity 113, the vibration of the compressor 2 can be effectively reduced. When the vibration of the compressor 2 is transmitted to the gas pressure cavity 113 through the support member 12, due to the different vibration transmission characteristics of the gas and the foot pad tray 11, and due to the small density and low bulk modulus of the gas inside the gas pressure cavity 113, when the vibration energy of the compressor 2 is transmitted to the gas pressure cavity 113 through the rubber material, the gas pressure cavity 113 will be obviously deformed, thereby consuming part of the vibration energy, and effectively reducing the vibration. In this embodiment, referring to Figure 7 , the gas pressure cavity 113 is arranged in the shape of a truncated cone. The gas pressure cavity 113 is arranged in the shape of a truncated cone, which can optimize the structure of the gas pressure cavity 113 and improve the damping effect.

[0053] In addition,Figure 6 And Figure 7 It can be known that the foot pad tray 11 is further provided with an inflation hole 114 located at the bottom of the foot pad tray 11, and the inflation hole 114 is in communication with the air pressure cavity 113. By arranging the inflation hole 114, the air pressure cavity 113 can be inflated to ensure sufficient gas in the air pressure cavity 113.

[0054] By Figure 2 It can also be known that the compressor damping foot pad 1 further comprises an isolation layer 14 covering the top of the foot pad tray 11, and the piezoelectric sheet device 13 is installed on the isolation layer 14. In the embodiment, the isolation layer 14 is a metal isolation layer, which can be made of copper, aluminum or alloy, and preferably made of aluminum. By arranging the isolation layer 14, the compressor 2 can be prevented from directly contacting the foot pad tray 11, the friction of the foot pad tray 11 caused by the vibration of the compressor 2 can be reduced, the service life of the foot pad tray 11 can be improved, and the installation carrier for the piezoelectric sheet device 13 can also be provided.

[0055] Referring to Figure 8 And Figure 9 The isolation layer 14 is provided with a groove 141 matched with the shape of the bottom of the compressor 2, and the piezoelectric sheet device 13 is installed in the groove 141. In the embodiment, the groove 141 is formed by the isolation layer 14 being concave towards the foot pad tray 11, and the foot pad tray 11 is provided with a receiving groove 111 matched with the groove 141 for accommodating the groove 141 area of the isolation layer 14. The isolation layer 14 is provided with the groove 141 matched with the shape of the bottom of the compressor 2, and the piezoelectric sheet device 13 is installed in the groove 141, so that the bottom of the compressor 2 can better fit the piezoelectric sheet device 13, and the damping effect can be improved.

[0056] In the embodiment, referring to Figure 9 The piezoelectric sheet device 13 is provided with a piezoelectric sheet array, and the piezoelectric sheets in the piezoelectric sheet array are uniformly arranged in the groove 141. The piezoelectric sheet device 13 adopts the piezoelectric sheet array, which can better control the vibration of each area and improve the damping effect. In the embodiment, the working principle of the piezoelectric sheet is based on the positive piezoelectric effect and the inverse piezoelectric effect. When mechanical stress acts on the piezoelectric sheet, electric charge is generated (positive piezoelectric effect), and vice versa, when an electric field is applied to the piezoelectric sheet, mechanical deformation is generated (inverse piezoelectric effect). The piezoelectric sheet converts the mechanical energy generated by vibration into electrical energy by using the positive piezoelectric effect of the material itself, and dissipates it in the internal circuit to achieve the purpose of damping. The piezoelectric sheet has a capacitor and an inductor inside, when external vibration energy acts on the piezoelectric sheet, electromagnetic oscillation will occur in the circuit to generate a resonant current in the circuit, so as to convert the mechanical energy of vibration into electrical energy for dissipation. The natural frequency of the piezoelectric sheet has the following relationship with its inductance and capacitance: Wherein, L is inductance, Cp is inherent capacitance of piezoelectric sheet.When compressor 2 starts, vibration frequency signal of compressor 2 is transmitted to control circuit by piezoelectric sheet device 13, control circuit changes inherent frequency of piezoelectric sheet structure by regulating piezoelectric sheet inductance parameter through electric signal, changes inductance parameter of piezoelectric sheet by applying electric field to piezoelectric sheet, and then changes inherent frequency of structure, so that piezoelectric sheet generates corresponding deformation.When inherent frequency of piezoelectric sheet structure is consistent with vibration frequency of compressor 2, at this time, piezoelectric sheet plays the most dissipation effect on vibration energy of compressor 2.

[0057] Compressor vibration damping foot pad 1 of the embodiment is used, first, the inductance parameter of piezoelectric sheet and the corresponding inherent frequency relationship are input into control circuit.When compressor 2 works, vibration energy and vibration signal are transmitted to piezoelectric sheet device 13, internal electromagnetic oscillation is caused by vibration of piezoelectric sheet device 13, current is generated in circuit, and vibration signal transmission is realized by transmitting electric energy and vibration signal to control circuit through electric lead.The vibration signal of piezoelectric sheet device 13 is received by control circuit, vibration frequency of compressor 2 is perceived, and signal control of inductance parameter of each piezoelectric sheet is realized to piezoelectric sheet device 13, so that the inherent frequency of each piezoelectric sheet is changed, vibration energy dissipation maximization is realized, and negative feedback regulation of compressor vibration is realized.

[0058] From the above, the compressor vibration damping foot pad 1 of the application is provided with piezoelectric sheet device 13, piezoelectric sheet device 13 is installed in the area where foot pad tray 11 is located in compressor containing position, and is in abutment with the bottom of compressor 2, and the inherent frequency of piezoelectric sheet in piezoelectric sheet device 13 is controlled by control circuit to match the vibration frequency of compressor 2, so that piezoelectric sheet generates vibration, vibration frequency of compressor 2 is the same as inherent frequency of piezoelectric sheet, structural resonance is realized, piezoelectric sheet vibration utilizes positive piezoelectric effect to generate electric charge in piezoelectric sheet, so as to realize dissipation of vibration energy, and realize damping effect, improve damping performance, and reduce noise generation.

[0059] It should be noted that the above is only the preferred embodiment of the application, but the design concept of the application is not limited to this, and any non-essential modification of the application made by using this concept also falls within the protection scope of the application.

Claims

1. A compressor vibration damping pad, characterized in that: Includes control circuitry, foot pads, and piezoelectric devices; The piezoelectric device is mounted on top of the foot pad tray and is used to abut against the bottom of the compressor; The control circuit is electrically connected to the piezoelectric element device, and the control circuit is used to control the natural frequency of the piezoelectric element in the piezoelectric element device to match the vibration frequency of the compressor.

2. The compressor vibration damping pad according to claim 1, characterized in that: The compressor vibration damping foot pad also includes an isolation layer that covers the top of the foot pad tray, and the piezoelectric device is mounted on the isolation layer.

3. The compressor vibration damping pad according to claim 2, characterized in that: The isolation layer is provided with a groove that matches the shape of the bottom of the compressor, and the piezoelectric device is installed in the groove.

4. The compressor vibration damping pad according to claim 3, characterized in that: The piezoelectric device is provided with a piezoelectric sheet array, in which the piezoelectric sheets are evenly arranged in the groove.

5. The compressor vibration damping pad according to claim 2, characterized in that: The isolation layer is a metal isolation layer.

6. The compressor vibration damping pad according to any one of claims 1 to 5, characterized in that: A coolant isolation layer is provided in the corresponding area of ​​the foot pad tray where the piezoelectric device is installed, and the coolant isolation layer is located inside the foot pad tray.

7. The compressor vibration damping pad according to any one of claims 1 to 5, characterized in that: The foot pad tray is made of rubber.

8. The compressor vibration damping pad according to any one of claims 1 to 5, characterized in that: The compressor vibration damping foot pad also includes three or more support members, which are evenly installed on the top of the foot pad tray along the circumference of the foot pad tray. The three or more support members form a compressor receiving position, and the piezoelectric device is installed on the foot pad tray in the area of ​​the compressor receiving position.

9. The compressor vibration damping pad according to claim 8, characterized in that: An air pressure chamber is provided at the connection position between the foot pad tray and the support member. The air pressure chamber is located inside the foot pad tray and is arranged along the circumference of the support member.

10. The compressor vibration damping pad according to claim 9, characterized in that: The air pressure chamber is arranged in a frustum shape.

11. The compressor vibration damping pad according to claim 9, characterized in that: The foot pad tray is also provided with an inflation hole, which is connected to the air pressure chamber.

12. A compressor assembly, comprising a compressor and compressor vibration damping pads, wherein the compressor is mounted on the compressor vibration damping pads, characterized in that: The compressor vibration damping pad is the compressor vibration damping pad described in any one of claims 1 to 11.

13. A refrigeration device, comprising a compressor unit, characterized in that: The compressor device described in claim 12 is the same as the compressor device described in claim 12.

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