Vibration-based Defrosting Device, Defrosting Method and Heat Pump System

Abstract

The present invention belongs to the technical field of heat pumps, and discloses a vibration-based defrosting device, a defrosting method and a heat pump system. The vibration-based defrosting device includes a connection box and a vibration generating unit. The connection box includes a box cover and a box body. The box cover is snap-connected to the box body to form a receiving cavity. The box cover and / or the box body can be connected to the outdoor unit heat exchanger of the heat pump unit. The side of the box body facing away from the receiving cavity is used to fit against the fins of the outdoor unit heat exchanger. The vibration generating unit is arranged in the receiving cavity and connected to the box body. The vibration-based defrosting device can achieve the defrosting effect by vibration, with high defrosting efficiency, low defrosting energy consumption and can reduce the interference to the operation of the heat pump unit during the defrosting process.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pumps, and in particular to a vibration-based defrosting device, a defrosting method, and a heat pump system. Background Art

[0002] As an efficient heating and cooling device, the heat pump unit is gradually being used. During heating in winter, frost is likely to form on the fins of the outdoor heat exchanger of the heat pump unit. After frosting, the heat resistance of the fins will increase, reducing the heat exchange efficiency of the outdoor heat exchanger, and thus leading to a decline in the performance of the heat pump unit and an increase in energy consumption.

[0003] Existing fin defrosting methods include hot gas bypass defrosting and reverse cycle defrosting, etc., which have problems such as long defrosting time, high energy consumption, and affecting the stability of indoor temperature. Moreover, the reverse cycle has a greater impact on the heat pump unit, affecting the service life of the heat pump unit.

[0004] Therefore, there is an urgent need to propose a vibration-based defrosting device, a defrosting method, and a heat pump system to solve the above technical problems. Summary of the Invention

[0005] The first object of the present invention is to provide a vibration-based defrosting device, which can achieve the defrosting effect through vibration.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The vibration-based defrosting device includes:

[0008] A connection box, which includes a box cover and a box body. The box cover is snap-connected to the box body to form a receiving cavity. The box cover and / or the box body can be connected to the outdoor heat exchanger of the heat pump unit, and the side of the box body facing away from the receiving cavity is used to fit against the fins of the outdoor heat exchanger;

[0009] A vibration generating unit, which is arranged in the receiving cavity and connected to the box body.

[0010] Optionally, the vibration directions emitted by the vibration generating unit include a first vibration direction and a second vibration direction. Both the first vibration direction and the second vibration direction are parallel to a reference plane, which is configured to be perpendicular to the side wall of the fin. The first vibration direction is opposite to the second vibration direction, and both the first vibration direction and the second vibration direction are configured not to be parallel to the side wall of the fin.

[0011] Optionally, the vibration directions emitted by the vibration generating unit further include a third vibration direction and a fourth vibration direction. Both the third vibration direction and the fourth vibration direction are parallel to the reference plane. The third vibration direction is opposite to the fourth vibration direction, and both the third vibration direction and the fourth vibration direction are configured not to be parallel to the side wall of the fin. The third vibration direction is not parallel to the first vibration direction.

[0012] Optionally, the number of vibration generating units is plural.

[0013] Optionally, at least one of the plural vibration generating units is a first vibration generating unit, and the rest are second vibration generating units. The first vibration generating units and the second vibration generating units are alternately arranged. The vibration wave emitted by the first vibration generating unit along the first vibration direction is a first vibration wave, the vibration wave emitted by the first vibration generating unit along the third vibration direction is a second vibration wave, the vibration wave emitted by the second vibration generating unit along the first vibration direction is a third vibration wave, and the vibration wave emitted by the second vibration generating unit along the third vibration direction is a fourth vibration wave.

[0014] The first vibration wave emitted by the first vibration generating unit overlaps with the third vibration wave emitted by the second vibration generating unit adjacent to and on one side of the first vibration generating unit.

[0015] And / or, the second vibration wave emitted by the first vibration generating unit overlaps with the fourth vibration wave emitted by the second vibration generating unit adjacent to and on the other side of the first vibration generating unit.

[0016] Optionally, the plural vibration generating units are uniformly distributed on the surface of the box body facing away from the accommodation cavity.

[0017] Optionally, the number of fins is plural. The plural fins are arranged in sequence in the same direction, and one side of the box body facing away from the accommodation cavity can be attached to each fin.

[0018] Optionally, the first orthographic projection of the plural fins on the box body is a first orthographic projection, and the second orthographic projection of the plural vibration generating units on the box body is a second orthographic projection. The first orthographic projection is located within the second orthographic projection.

[0019] The second object of the present invention is to provide a defrosting method. This defrosting method can not only remove the dew and frost layers on the outdoor unit heat exchanger, but also reduce the energy consumption during dewing.

[0020] To achieve this object, the present invention adopts the following technical solutions:

[0021] A defrosting method, using the above-mentioned vibration-based defrosting device. The defrosting method includes the following steps:

[0022] Judge whether the outdoor unit heat exchanger is dew-covered and judge whether the outdoor unit heat exchanger is frosted.

[0023] If the outdoor unit heat exchanger is dew-covered, the vibration generating unit starts the first vibration mode with a vibration frequency of f1.

[0024] If the outdoor unit heat exchanger is frosted, the vibration generating unit starts the second vibration mode with a vibration frequency of f2, where .

[0025] The third object of the present invention is to provide a heat pump system, which can remove the frost layer on the fins of the outdoor unit heat exchanger of the heat pump system by vibration, with high defrosting efficiency, low defrosting energy consumption and can reduce the interference to the operation of the heat pump unit during the defrosting process.

[0026] To achieve this object, the present invention adopts the following technical solutions:

[0027] The heat pump system includes the vibration-based defrosting device described above, or includes the defrosting method described above.

[0028] Advantages of the present invention:

[0029] The vibration-based defrosting device provided by the present invention includes a connection box and a vibration generating unit. Among them, the lid of the connection box is snap-connected to the box body to form a receiving cavity, and the vibration generating unit is arranged in the receiving cavity and connected to the box body. Thus, the connection box and the vibration generating unit form an integral body. The lid and / or the box body are connected to the outdoor unit heat exchanger of the heat pump unit, and the side of the box body facing away from the receiving cavity is attached to the fins of the outdoor unit heat exchanger. Furthermore, the vibration generated by the vibration generating unit can be transmitted to the fins through the box body, causing the fins to vibrate so that the frost layer on the fins falls off, achieving the defrosting effect. The vibration-based defrosting device can achieve the defrosting effect through vibration, with high defrosting efficiency, low defrosting energy consumption and can reduce the interference to the operation of the heat pump unit during the defrosting process. Description of the Drawings

[0030] Figure 1 is the first schematic structural diagram of the heat pump unit provided by the present invention;

[0031] Figure 2 is the second schematic structural diagram of the heat pump unit provided by the present invention;

[0032] Figure 3 is the schematic structural diagram of the vibration-based defrosting device provided by the present invention;

[0033] Figure 4 is the layout schematic diagram of multiple vibration generating units provided by the present invention;

[0034] Figure 5 is the perspective view of the outdoor unit heat exchanger provided by the present invention;

[0035] Figure 6 is the first schematic diagram of the heat pump system provided by the present invention;

[0036] Figure 7 is the second schematic diagram of the heat pump system provided by the present invention;

[0037] Figure 8It is a flowchart of the defrosting method provided by the present invention.

[0038] In the figure:

[0039] D1, the first vibration direction; D2, the second vibration direction; D3, the third vibration direction; D4, the fourth vibration direction;

[0040] 100, connection box; 110, box cover; 111, connection ear; 120, box body; 130, filler; 200, heat pump unit; 210, outdoor heat exchanger; 211, fin; 212, heat exchange tube; 213, end plate; 220, four-way valve; 230, compressor; 240, throttle valve; 250, indoor heat exchanger; 260, fan; 300, vibration generating unit; 310, first vibration generating unit; 311, first vibration wave; 312, second vibration wave; 320, second vibration generating unit; 321, third vibration wave; 322, fourth vibration wave; 400, controller; 500, detection unit; 510, temperature and humidity sensor; 520, infrared thermal imager; 530, pressure sensor; 540, differential pressure sensor; 550, stress sensor. Specific embodiments

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the sake of description, only the parts related to the present invention rather than all the structures are shown in the drawings.

[0042] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it 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 communication inside two elements or the interaction relationship between two elements. 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.

[0043] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0044] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0045] This embodiment provides a vibration-based defrosting device, which is mainly applied to the outdoor unit of a heat pump unit. The vibration-based defrosting device can achieve the defrosting effect through vibration.

[0046] The above-mentioned heat pump unit is applicable to common heat pump units in the art. Exemplarily, as Figure 1 、 Figure 2 and Figure 7 shown, the heat pump unit 200 includes a compressor 230, a four-way valve 220, an indoor heat exchanger 250, a throttle valve 240, an outdoor heat exchanger 210, and a fan 260. The outdoor heat exchanger 210 is applicable to common finned heat exchangers in the art. As Figure 3 and Figure 5 shown, the outdoor heat exchanger 210 includes fins 211, heat exchange tubes 212, and two end plates 213. The number of fins 211 is multiple. For example, the number of fins 211 is thirty, forty, or fifty, etc. The multiple fins 211 are arranged in sequence in the same direction. The two end plates 213 are respectively located on the sides of the two outermost fins 211 among the multiple fins 211 that face away from each other. The heat exchange tubes 212 pass through the multiple fins 211 in sequence.

[0047] As Figures 1 to 3 shown, the vibration-based defrosting device includes a connection box 100 and a vibration generating unit 300. Among them, the connection box 100 includes a box cover 110 and a box body 120. The box cover 110 is snap-connected to the box body 120 to form a receiving cavity. The box cover 110 and / or the box body 120 can be connected to the outdoor heat exchanger 210 of the heat pump unit 200, and the side of the box body 120 facing away from the receiving cavity is used to fit with the fins 211 of the outdoor heat exchanger 210. The vibration generating unit 300 is arranged in the receiving cavity and is connected to the box body 120. Exemplarily, the vibration generating unit 300 can be a linear motor, an electrodynamic exciter, or an electromagnetic exciter, etc.

[0048] The vibration energy generated by the vibration generating unit 300 of the vibration-based defrosting device is transmitted to the fin 211 through the box body 120, causing the fin 211 to vibrate. The vibration directly acts on the frost layer through the fin 211, so that the frost layer on the fin 211 falls off, achieving the defrosting effect. The vibration of the vibration-based defrosting device can directly act on the frost layer, achieving a rapid defrosting effect.

[0049] Compared with the traditional hot gas bypass defrosting and reverse cycle defrosting, the vibration-based defrosting device does not need to consume a large amount of energy to melt the frost layer, greatly reducing the energy consumption required for defrosting.

[0050] The vibration-based defrosting device does not need to change the operation mode of the heat pump unit 200, and can defrost on the basis of not affecting the normal operation of the heat pump unit 200, reducing the interference with the operation of the heat pump unit 200 and improving the stability and reliability of the heat pump unit 200.

[0051] The vibration-based defrosting device only needs to connect the box cover 110 and / or the box body 120 to the outdoor heat exchanger 210 of the heat pump unit 200, and attach the side of the box body 120 facing away from the accommodation cavity to the fin 211 of the outdoor heat exchanger 210, and can be compatible with various existing forms of heat pump units 200 without large-scale modification of the heat pump unit 200.

[0052] When dew or dirt such as dust accumulates on the fin 211, the vibration generating unit 300 can also be started to make the fin 211 vibrate, so that the dew and / or dirt on the fin 211 fall off, achieving the effects of dew removal, frost prevention and dust removal; after the dirt on the fin 211 falls off during dust removal, the dirt can be blown away by the fan 260, thereby achieving the effect of improving the heat exchange efficiency of the outdoor heat exchanger 210.

[0053] Since the heat exchange tube 212 of the outdoor heat exchanger 210 passes through the fin 211, when the fin 211 vibrates, the fin 211 drives the heat exchange tube 212 to vibrate together. Furthermore, the dirt on the inner wall of the heat exchange tube 212 can fall off and flow to the filter (not shown in the figure) of the heat pump unit 200 along with the working medium flowing in the heat exchange tube 212 and be filtered out. It can also make the impurities deposited in the heat exchange tube 212 float up and flow to the filter of the heat pump unit 200 along with the working medium flowing in the heat exchange tube 212 and be filtered out, achieving the effect of vibration descaling and extending the service life of the heat pump unit 200.

[0054] In this embodiment, the vibration-based defrosting device is located at the top of the fin 211. Connecting ears 111 are respectively provided on both sides of the box cover 110, and each connecting ear 111 is respectively connected to a corresponding end plate 213 by screws. Of course, in another embodiment, the vibration-based defrosting device can also be located on the side wall or at the bottom of the fin 211. In still another embodiment, the box body 120 is connected to the end plate 213, or both the box cover 110 and the box body 120 are connected to the end plate 213.

[0055] Optionally, the vibration generating unit 300 and the box body 120 can be fixedly connected or detachably connected.

[0056] Optionally, as Figure 3 shown, the vibration-based defrosting device further includes a filler 130, and the filler 130 is filled in the accommodation cavity to make the connection box 100 form a vibration integral body, improving the vibration transmission effect. Exemplarily, the filler 130 can be polyurethane or the like.

[0057] Optionally, as Figure 4 shown, the vibration directions emitted by the vibration generating unit 300 include a first vibration direction D1 and a second vibration direction D2. Both the first vibration direction D1 and the second vibration direction D2 are parallel to a reference plane (not shown in the figure). The reference plane is configured to be perpendicular to the side wall of the fin 211. The first vibration direction D1 is opposite to the second vibration direction D2, and both the first vibration direction D1 and the second vibration direction D2 are configured to be not parallel to the side wall of the fin 211. Furthermore, the vibration waves emitted by the vibration generating unit 300 along the first vibration direction D1 and the second vibration direction D2 can cause the fin 211 to vibrate in a direction perpendicular to the side wall of the fin 211, which is beneficial to rapid defrosting and can avoid the remaining frost layer on the fin 211, improving the defrosting effect. In this embodiment, the reference plane is parallel to the surface of the box body 120 facing the fin 211.

[0058] Furthermore, the vibration directions emitted by the vibration generating unit 300 further include a third vibration direction D3 and a fourth vibration direction D4. Both the third vibration direction D3 and the fourth vibration direction D4 are parallel to the reference plane. The third vibration direction D3 is opposite to the fourth vibration direction D4, and both the third vibration direction D3 and the fourth vibration direction D4 are configured to be not parallel to the side wall of the fin 211. The third vibration direction D3 is not parallel to the first vibration direction D1, that is, the vibration generating unit 300 can emit vibration waves not only along the first vibration direction D1 and the second vibration direction D2, but also along the third vibration direction D3 and the fourth vibration direction D4, which can not only increase the vibration amplitude of the fin 211, but also make the frost layer on the fin 211 fall off rapidly under the action of alternating stress, further improving the defrosting effect.

[0059] It should be noted that the vibration generating unit 300 can be an x-axis motor, and the x-axis motor can generate vibrations in three axial directions of the x-axis, y-axis, and z-axis; the vibration generating unit can also be two z-axis motors, and the z-axis motor can generate vibrations in one axial direction of the z-axis. Therefore, the two z-axis motors can be connected, and the vibration directions of the two z-axis motors are not parallel.

[0060] Optionally, the number of the vibration generating units 300 is multiple to increase the vibration amplitude of the fins 211 and improve the defrosting effect. Exemplarily, the number of the vibration generating units 300 can be two, eight, ten, etc.

[0061] Furthermore, as Figure 3 shown, one side of the box body 120 facing away from the accommodation cavity can be attached to each fin 211, so that the vibration generated by the vibration generating unit 300 is transmitted to each fin 211 through the box body 120, enabling each fin 211 to vibrate and achieving the effect of vibration defrosting.

[0062] Even further, as Figure 5 shown, the orthographic projection of the multiple fins 211 on the box body 120 is the first orthographic projection, and the orthographic projection of the multiple vibration generating units 300 on the box body 120 is the second orthographic projection. The first orthographic projection is located within the second orthographic projection, so that the multiple vibration generating units can cover the multiple fins 211, which can not only improve the vibration defrosting effect but also improve the uniformity of vibration defrosting.

[0063] In this embodiment, the positive and negative poles of the multiple vibration generating units 300 are connected in parallel. When a certain one of the multiple vibration generating units 300 is damaged, the remaining vibration generating units 300 can still vibrate for defrosting, improving the reliability of the operation of the defrosting device based on vibration.

[0064] Optionally, as Figure 4 shown, at least one of the multiple vibration generating units 300 is a first vibration generating unit 310, and the rest are second vibration generating units 320. The first vibration generating unit 310 and the second vibration generating units 320 are alternately arranged along the distribution direction of the multiple fins 211. The vibration wave emitted by the first vibration generating unit 310 along the first vibration direction D1 is the first vibration wave 311, and the vibration wave emitted by the first vibration generating unit 310 along the third vibration direction D3 is the second vibration wave 312. The vibration wave emitted by the second vibration generating unit 320 along the first vibration direction D1 is the third vibration wave 321, and the vibration wave emitted by the second vibration generating unit 320 along the third vibration direction D3 is the fourth vibration wave 322; the first vibration wave 311 emitted by the first vibration generating unit 310 overlaps with the third vibration wave 321 emitted by the second vibration generating unit 320 adjacent to and on one side of the first vibration generating unit 310. Exemplarily, as Figure 4As shown in the figure, the first vibration wave 311 emitted by a first vibration generating unit 310 overlaps with the third vibration wave 321 emitted by a second vibration generating unit 320 located at the lower right side of the first vibration generating unit 310, so that the first vibration wave 311 and the third vibration wave 321 can be superimposed, thereby amplifying the vibration to increase the vibration amplitude of the fin 211; the second vibration wave 312 emitted by the first vibration generating unit 310 overlaps with the fourth vibration wave 322 emitted by a second vibration generating unit 320 adjacent to the first vibration generating unit 310 and located on the other side of the first vibration generating unit 310. Exemplarily, as Figure 4 shown in the figure, the second vibration wave 312 emitted by a first vibration generating unit 310 overlaps with the fourth vibration wave 322 emitted by a second vibration generating unit 320 located at the lower left side of the first vibration generating unit 310, so that the second vibration wave 312 and the fourth vibration wave 322 can be superimposed, thereby amplifying the vibration to increase the vibration amplitude of the fin 211 and improving the defrosting effect.

[0065] In other embodiments, it is also possible that only the first vibration wave 311 and the third vibration wave 321 overlap, or only the second vibration wave 312 and the fourth vibration wave 322 overlap, which can be determined according to actual application requirements.

[0066] In this embodiment, there are eight first vibration generating units 310 and nine second vibration generating units 320. The eight first vibration generating units 310 and the nine second vibration generating units 320 are alternately arranged along the distribution direction of the plurality of fins 211, and each adjacent first vibration generating unit 310 and a second vibration generating unit 320 are substantially in a herringbone shape. Of course, in other embodiments, the number of the first vibration generating units 310 and the second vibration generating units 320 can also be one, two, five or twelve, etc., and the first vibration generating units 310 and the second vibration generating units 320 can also be alternately arranged along the first vibration direction D1, the third vibration direction D3 or other directions.

[0067] Optionally, as Figure 6 shown in the figure, the defrosting device based on vibration further includes a detection unit 500 and a controller 400 (such as a microprocessor or a single-chip microcomputer, etc.). The detection unit 500 is used to detect the environmental parameters of the environment where the outdoor unit heat exchanger 210 is located and the operating parameters of the heat pump unit 200. The detection unit 500, the vibration generating unit 300 and the heat pump unit 200 are all signal-connected to the controller 400. The controller 400 is used to receive the parameter signals obtained by the detection unit 500, process the above parameter signals, and control the start and stop, vibration frequency, vibration amplitude and vibration duration of the vibration generating unit 300 according to the processing results. In addition, the controller 400 can also control whether the heat pump unit 200 starts the defrosting mode according to the processing results.

[0068] It should be noted that the methods for the above controller 400 to control the start / stop, vibration frequency, vibration amplitude, and vibration duration of the vibration generating unit 300, and the method for the controller 400 to control whether to start the defrosting mode of the heat pump unit 200 are all prior arts and will not be elaborated here.

[0069] Furthermore, as Figure 7 shown, the detection unit 500 includes a temperature and humidity sensor 510, an infrared thermal imager 520, a pressure sensor 530, a differential pressure sensor 540, and a stress sensor 550. The vibration generating unit 300, the temperature and humidity sensor 510, the infrared thermal imager 520, the pressure sensor 530, the differential pressure sensor 540, and the stress sensor 550 are all signal-connected to the controller 400.

[0070] Even further, the temperature and humidity sensor 510 is installed on the air inlet side of the outdoor unit heat exchanger 210 for detecting the ambient temperature T and ambient humidity RH of the environment where the outdoor unit heat exchanger 210 is located. The infrared thermal imager 520 is installed in the lower area below the air inlet side of the outdoor unit heat exchanger 210 so that the infrared thermal imager 520 can cover the lower half area of the outdoor unit heat exchanger 210 for detecting the surface temperature distribution of the lower half of the outdoor unit heat exchanger 210 . The pressure sensor 530 is installed on the suction pipeline of the compressor 230 for detecting the air pressure P in the suction pipeline of the compressor 230. The differential pressure sensor 540 is installed across the air inlet side and the air outlet side of the outdoor unit heat exchanger 210. It is preferably ensured that the distance between the two measuring points is the same as the thickness of the fin 211 evaporator to improve the measurement accuracy. The differential pressure sensor 540 is used for detecting the air pressure difference between the air inlet side and the air outlet side of the outdoor unit heat exchanger 210 . The stress sensor 550 is installed on the heat exchange tube 212 for detecting the stress of the heat exchange tube 212.

[0071] This embodiment also provides a defrosting method. This defrosting method can not only remove the dew on the outdoor unit heat exchanger 210 to play a role in preventing the outdoor unit heat exchanger 210 from frosting, but also reduce the energy consumption of the vibration generating unit 300 during dew removal. In addition, this defrosting method can also remove the frost layer on the outdoor unit heat exchanger 210 to avoid increasing the internal resistance of the outdoor unit heat exchanger 210.

[0072] As Figure 8 shown, the defrosting method includes the following steps: determining whether the outdoor unit heat exchanger 210 is dew-covered and determining whether the outdoor unit heat exchanger 210 is frosted; if the outdoor unit heat exchanger 210 is dew-covered, the vibration generating unit 300 starts the first vibration mode with a vibration frequency of f1; if the outdoor unit heat exchanger 210 is frosted, the vibration generating unit 300 starts the second vibration mode with a vibration frequency of f2, where 。

[0073] In this defrosting method, it is determined whether the outdoor unit heat exchanger 210 is dew - condensed. If the outdoor unit heat exchanger 210 is dew - condensed, the vibration generating unit 300 starts the first vibration mode to vibrate the fins 211 of the outdoor unit heat exchanger 210, and the dew drops on the fins 211 and the heat exchange tubes 212 of the outdoor unit heat exchanger 210 fall off along with the vibration, achieving the effect of dew removal, and further achieving the effect of preventing the outdoor unit heat exchanger 210 from frosting.

[0074] This defrosting method also determines whether the outdoor unit heat exchanger 210 is frosted. If the outdoor unit heat exchanger 210 is frosted, the vibration generating unit 300 starts the second vibration mode to vibrate the fins 211 of the outdoor unit heat exchanger 210, and the frost layer on the fins 211 and the heat exchange tubes 212 of the outdoor unit heat exchanger 210 falls off along with the vibration, achieving the effect of defrosting.

[0075] In addition, compared with dew drops, the adhesion of the frost layer is greater. Therefore, the vibration frequency f2 when the vibration generating unit 300 starts the second vibration mode is greater than the vibration frequency f1 of the first vibration mode, so that the frost layer on the fins 211 and the heat exchange tubes 212 can fall off smoothly, not only achieving the effect of efficient defrosting, but also reducing the energy consumption during dew removal.

[0076] It should be noted that the specific values of the above - mentioned f1 and f2 can be determined according to the actual operating conditions and usage requirements. For example, f1 can be 20%, 30% or 40%, etc. Generally, f1 being 20% - 40% can be applicable to most operating conditions. f2 can be 60%, 80% or 90%, etc. Generally, f2 being 60% - 90% can be applicable to most operating conditions.

[0077] Optionally, the method for determining whether the outdoor unit heat exchanger 210 is dew - condensed includes: monitoring the ambient temperature T and the ambient humidity RH of the environment where the outdoor unit heat exchanger 210 is located; if ,and ,it is determined that the outdoor unit heat exchanger 210 is dew - condensed. When the ambient temperature is relatively low and the ambient humidity is relatively high, the probability of dew condensation on the fins 211 and the heat exchange tubes 212 is relatively high. Therefore, by using the ambient temperature and the ambient humidity to determine whether the outdoor unit heat exchanger 210 is dew - condensed, the accuracy of the determination is improved, the misjudgment probability is reduced, and further the effect of preventing the outdoor unit heat exchanger 210 from frosting can be improved.

[0078] It should be noted that the specific values of the above - mentioned T1 and RH1 can be determined according to the actual operating conditions and usage requirements. For example, T1 can be 3°C or 5°C, etc., and RH1 can be 60% or 70%, etc.

[0079] In other embodiments, other methods may also be used to determine whether the outdoor unit heat exchanger 210 is dew - forming. For example, it can be determined by monitoring whether the outdoor unit heat exchanger 210 is dew - forming through a camera, etc.

[0080] Optionally, the method for determining whether the outdoor unit heat exchanger 210 is frosting includes: monitoring the surface temperature distribution of the outdoor unit heat exchanger 210 and the air pressure difference between the air inlet side and the air outlet side of the outdoor unit heat exchanger 210 ; if , or , then it is determined that the outdoor unit heat exchanger 210 is frosting. First, when several of the multiple fins 211 are frosted, the temperature difference between the frosted fins 211 and the unfrosted fins 211 on the surface is relatively large (i.e., is relatively large). Therefore, when , it can be determined that the outdoor unit heat exchanger 210 is frosting. Second, when several of the multiple fins 211 are frosted, the air pressure difference between the air inlet side and the air outlet side of the outdoor unit heat exchanger 210 is relatively large. Therefore, when , it can be determined that the outdoor unit heat exchanger 210 is frosting. Third, when either of the two conditions of and is met, it is determined that the outdoor unit heat exchanger 210 is frosting, which can significantly reduce the probability of misjudgment and improve the reliability of defrosting.

[0081] It should be noted that the specific values of the above and can be determined according to the actual operating conditions and usage requirements. For example, can be 4°C or 6°C, etc., can be 10 Pa or 12 Pa, etc.

[0082] In other embodiments, other methods may also be used to determine whether the outdoor unit heat exchanger 210 is frosting. For example, it can be determined by monitoring whether the outdoor unit heat exchanger 210 is frosting through a camera, etc.

[0083] Furthermore, the method for determining whether the outdoor unit heat exchanger 210 is frosting further includes: is the surface temperature distribution at the bottom or the lower half of the outdoor unit heat exchanger 210. Since the frost on the outdoor unit heat exchanger 210 is formed by the solidification of dew, and under the action of gravity, the dew drops at the top and the upper half of the outdoor unit heat exchanger 210 will flow downward. Therefore, the dew is likely to accumulate in the bottom and lower half regions of the outdoor unit heat exchanger 210, and the probability of condensing into frost in the bottom and lower half regions of the outdoor unit heat exchanger 210 is greater. Therefore, taking the surface temperature distribution at the bottom or the lower half of the outdoor unit heat exchanger 210 as It can improve the accuracy of judgment, reduce the probability of misjudgment, and thus improve the reliability of defrosting.

[0084] Optionally, the defrosting method further includes the following steps: after the vibration generating unit 300 starts the first vibration mode, it determines whether the outdoor unit heat exchanger 210 is frosted. If it is determined that the outdoor unit heat exchanger 210 is frosted, the vibration generating unit 300 changes from the first vibration mode to the second vibration mode. That is to say, after the vibration generating unit 300 starts the first vibration mode, if it is monitored that the outdoor unit heat exchanger 210 is frosted, the vibration generating unit 300 increases the vibration frequency from f1 to f2, so that the vibration frequencies of the fins 211 and the heat exchange tubes 212 increase, and the frost layer on the fins 211 and the heat exchange tubes 212 can fall off smoothly. This method realizes dynamically monitoring whether the outdoor unit heat exchanger 210 is frosted during the dew removal process and can defrost in time.

[0085] In this embodiment, after the vibration generating unit 300 starts the first vibration mode, it continuously determines whether the outdoor unit heat exchanger 210 is frosted to improve the defrosting effect. Of course, in other embodiments, it may also be that after the vibration generating unit 300 starts the first vibration mode, it intermittently determines whether the outdoor unit heat exchanger 210 is frosted, that is, determines whether the outdoor unit heat exchanger 210 is frosted every other certain time period.

[0086] In this embodiment, after the vibration generating unit 300 starts the first vibration mode, the method for determining whether the outdoor unit heat exchanger 210 is frosted is: monitoring the surface temperature distribution of the outdoor unit heat exchanger 210 and the wind pressure difference between the inlet side and the outlet side of the outdoor unit heat exchanger 210 ; if or , it is determined that the outdoor unit heat exchanger 210 is frosted.

[0087] Optionally, the defrosting method further includes the following steps: determining whether the frost layer thickness h on the outdoor unit heat exchanger 210 and the preset thickness h1 satisfy ; if it is satisfied and the vibration generating unit 300 has not started, the vibration generating unit 300 starts the third vibration mode, and the heat pump unit 200 starts the defrosting mode; if it is satisfied when the vibration generating unit 300 is in the second vibration mode, that is, after the vibration generating unit 300 starts the second vibration mode, it is monitored that , the vibration generating unit 300 changes from the second vibration mode to the third vibration mode, and the heat pump unit 200 starts the defrosting mode. When When it is, it indicates that the frost layer thickness on the outdoor unit heat exchanger 210 is relatively thick. At this time, if defrosting is only carried out by vibration, the defrosting effect is not good. On the one hand, it is easy to have the problem of residual frost layer on the surface of the outdoor unit heat exchanger 210, and on the other hand, the defrosting speed is relatively slow. Therefore, when When it is, the vibration generating unit 300 starts the third vibration mode and starts the defrosting mode of the heat pump unit 200 to achieve a double defrosting effect, solve the problem of residual frost layer on the surface of the outdoor unit heat exchanger 210, improve the defrosting speed at the same time, and reduce the adverse impact caused by the relatively thick frost layer on the heat pump unit 200. In addition, this defrosting method judges whether the conditions are met at two nodes, namely when the vibration generating unit 300 is not started and after the vibration generating unit 300 starts the second vibration mode , which improves the reliability and timeliness of removing relatively thick frost layers.

[0088] In this embodiment, after the vibration generating unit 300 starts the second vibration mode, it continuously judges whether the conditions are met to further improve the reliability and timeliness of removing relatively thick frost layers. Of course, in other embodiments, it can also be that after the vibration generating unit 300 starts the second vibration mode, it intermittently judges whether the conditions are met , that is, it judges whether the conditions are met once every certain time interval .

[0089] It should be noted that the specific value of h1 above can be determined according to the actual use conditions and requirements. For example, h1 can be 1.5 mm or 2.2 mm, etc.

[0090] It should also be noted that the magnitude relationship between the vibration frequency f3 of the third vibration mode and the vibration frequency f2 of the second vibration mode can be determined according to the actual working conditions and requirements, that is, f3 can be greater than, less than or equal to f2.

[0091] It should also be noted that the defrosting mode of the heat pump unit 200 above is a common defrosting mode in the art. Exemplarily, the defrosting mode of the heat pump unit 200 can be a reverse cycle defrosting mode. When the heat pump unit 200 starts the reverse cycle defrosting mode, such as Figure 7As shown, the four-way valve 220 in the heat pump unit 200 changes its direction, and the flow direction of the refrigerant is changed by the four-way valve 220, so that the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 230 enters the heat exchange tube 212 of the outdoor unit heat exchanger 210. The high-temperature and high-pressure gaseous refrigerant releases heat in the heat exchange tube 212 to melt the frost layer on the fin 211 and the heat exchange tube 212. After defrosting, the refrigerant passes through the expansion valve and then enters the indoor unit heat exchanger 250, thus completing a reverse cycle defrosting cycle. When the frost layer on the fin 211 and the heat exchange tube 212 melts, the four-way valve 220 changes its direction again to resume the heating mode. The defrosting mode of the heat pump unit 200 can also be the electric heating defrosting mode. When the heat pump unit 200 starts the electric heating defrosting mode, the heating element (such as a heating rod or a heating wire) arranged near the fin 211 and / or the heat exchange tube 212 is powered on, and the heating element emits heat to melt the frost layer on the fin 211 and the heat exchange tube 212. When the frost layer on the fin 211 and the heat exchange tube 212 melts, the heating element is powered off. Other defrosting modes of the heat pump unit 200 are not listed one by one here.

[0092] Further, the method for determining whether the frost layer thickness h on the outdoor unit heat exchanger 210 and the preset thickness h1 satisfy includes: monitoring the surface temperature distribution of the outdoor unit heat exchanger 210 and the air pressure difference between the air inlet side and the air outlet side of the outdoor unit heat exchanger 210 ; if and , it is determined that h and h1 satisfy . When frost forms on the outdoor unit heat exchanger 210, and will both increase with the increase of the frost layer thickness. Therefore, when and , it can be determined that the frost layer thickness h on the outdoor unit heat exchanger 210 is above the preset thickness h1. This judgment method is relatively simple and can quickly determine whether is satisfied, thereby shortening the response time for the heat pump unit 200 to start the defrosting mode and the response time for the vibration generating unit 300 to start the third vibration mode. In addition, this method requires both and to be satisfied to determine , improving the accuracy of judging the frost layer thickness and thus avoiding the problem of the heat pump unit 200 misstarting the defrosting mode. Since when the heat pump unit 200 starts the defrosting mode, there are problems such as increased energy consumption, reduced indoor temperature stability, and a large impact on the heat pump unit 200. Therefore, in practical applications, the heat pump unit 200 should be started in the defrosting mode as little as possible and avoided. The above method determines whether and are satisfied by two conditions to determine whether The method avoids the problem of the heat pump unit 200 accidentally starting the defrosting mode, thereby reducing energy consumption, improving the indoor temperature stability, and reducing the impact on the heat pump unit 200.

[0093] It should be noted that the above and specific values can be determined according to the actual operating conditions and usage requirements. For example, it can be 7 °C or 10 °C, etc., and it can be 30 Pa or 35 Pa, etc.

[0094] In other embodiments, it is also possible to determine whether the frost layer thickness h on the outdoor unit heat exchanger 210 and the preset thickness h1 satisfy , for example, by finding the position on the outdoor unit heat exchanger 210 where a relatively thick frost layer is likely to occur (such as the bottom area of the fin 211, etc.) according to experiments or experience, installing a through-beam sensor at this position, and the positions corresponding to the transmitter and receiver of the through-beam sensor are the positions when the frost layer thickness reaches h1. When the receiver cannot receive the light beam emitted by the transmitter, it can be determined that the frost layer thickness h has reached h1, that is, it satisfies .

[0095] Furthermore, the method for determining whether the frost layer thickness h on the outdoor unit heat exchanger 210 and the preset thickness h1 satisfy also includes: first determining the and size relationship. When , then determining the and size relationship. This method divides the determination of whether the frost layer thickness satisfies into two steps. The first step is to first determine the and size relationship. When , it can be preliminarily determined that the frost layer thickness satisfies . At this time, the second step of determination is carried out, that is, determining the and size relationship, and using the and size relationship as the basis for verifying whether the judgment result of the first step is correct. If , it is determined that the judgment result of the first step is correct, that is, the frost layer thickness satisfies . If , it is determined that the judgment result of the first step is incorrect, that is, the frost layer thickness does not satisfy . This method further simplifies the steps for determining the frost layer thickness. Specifically, in the first step of determination, if , there is no need to determine and The size relationship can directly determine that the frost layer thickness does not meet .

[0096] In another embodiment, it is also possible to first judge and The size relationship of, when , then judge and The size relationship of, that is, in the first step, first judge and The size relationship of, when , it can be preliminarily determined that the frost layer thickness meets . At this time, perform the second step of judgment, that is, judge and The size relationship of, and use and The size relationship of as the basis for verifying whether the result of the first step of judgment is correct. If , then it is determined that the judgment result of the first step is correct. If , then it is determined that the judgment result of the first step is incorrect. In the first step of judgment, if , then there is no need to judge and The size relationship of directly determines that the frost layer thickness does not meet .

[0097] In practical applications, multiple and the corresponding data of the frost layer thickness, as well as multiple and the corresponding data of the frost layer thickness can be obtained according to multiple tests. For example, When, the corresponding frost layer thickness is 1.2 mm, When, the corresponding frost layer thickness is 1.5 mm, When, the corresponding frost layer thickness is 1.3 mm, When, the corresponding frost layer thickness is 1.6 mm, etc. Furthermore, when detecting the actual value and the actual value, the frost layer thickness value corresponding to the value and the frost layer thickness value corresponding to the value can be quickly obtained, and this method can further simplify the steps of judging the frost layer thickness.

[0098] Optionally, such as Figure 8As shown, the defrosting method further includes the following steps: After starting the monitoring, first determine whether the outdoor unit heat exchanger 210 is dew condensation. If it is determined that the outdoor unit heat exchanger 210 has no dew condensation (hereinafter referred to as zero-level risk), the monitoring is directly ended. After a certain period of time, determine again whether the outdoor unit heat exchanger 210 is dew condensation. If it is determined that the outdoor unit heat exchanger 210 is dew condensation, start to determine the risk level. If it is determined that the outdoor unit heat exchanger 210 is not frosted, that is, the outdoor unit heat exchanger 210 only has dew condensation and no frost (hereinafter referred to as first-level risk), the vibration generating unit 300 starts the first vibration mode. If it is determined that the outdoor unit heat exchanger 210 is frosted (hereinafter referred to as second-level risk), the vibration generating unit 300 starts the second vibration mode. If it is determined that the thickness of the frost layer on the outdoor unit heat exchanger 210 meets (hereinafter referred to as third-level risk), the vibration generating unit 300 starts the third vibration mode, and the heat pump unit 200 starts the defrosting mode. This method shortens the response time of the defrosting operation when the outdoor unit heat exchanger 210 is in the second-level risk and the third-level risk, achieving a more rapid and effective defrosting effect. When the outdoor unit heat exchanger 210 is in the zero-level risk, the monitoring is directly ended, simplifying the monitoring steps and saving energy consumption. In addition, in this embodiment, after it is determined that the outdoor unit heat exchanger 210 is in the first-level risk, continuous monitoring is still carried out to determine whether the outdoor unit heat exchanger 210 changes from the first-level risk to the second-level risk or the third-level risk. When it changes to the second-level risk or the third-level risk, the corresponding defrosting mode is started to achieve a timely and efficient defrosting effect.

[0099] Further, after the vibration generating unit 300 starts the third vibration mode and the heat pump unit 200 starts the defrosting mode, determine whether the defrosting mode of the heat pump unit 200 is completed. When the defrosting mode of the heat pump unit 200 is completed, the vibration generating unit 300 stops vibrating and re-determines whether the outdoor unit heat exchanger 210 is dew condensation to achieve the effect of reducing energy consumption.

[0100] It should be noted that the method for determining whether the defrosting mode of the heat pump unit 200 is completed is the prior art in this field. Exemplarily, after the defrosting mode of the heat pump unit 200 is started for a preset duration, it can be determined that the defrosting mode of the heat pump unit 200 is completed.

[0101] Optionally, the defrosting method further includes the following steps: Determine whether there is dirt on the outdoor unit heat exchanger 210. If there is dirt on the outdoor unit heat exchanger 210, the vibration generating unit 300 starts the fourth vibration mode. The vibration generating unit 300 emits vibrations to vibrate the fin 211, and the fin 211 drives the heat exchange tube 212 to vibrate together, causing the dirt on the fin 211 and / or the heat exchange tube 212 to fall off, achieving a descaling effect.

[0102] Further, the method for determining whether there is dirt on the outdoor unit heat exchanger 210 includes: monitoring the air pressure difference between the air inlet side and the air outlet side of the outdoor unit heat exchanger 210 , if , it is determined that there is dirt on the outdoor unit heat exchanger 210. When there is dirt (such as dust, etc.) on the fins 211, the air pressure difference between the air inlet side and the air outlet side of the outdoor unit heat exchanger 210 will increase. Therefore, by monitoring , when , it can be determined that there is dirt on the fins 211 of the outdoor unit heat exchanger 210. At this time, the vibration generating unit 300 starts the fourth vibration mode to vibrate the fins 211, so that the dirt on the fins 211 falls off. After the dirt falls off from the fins 211, it is blown away by the blower 260 adjacent to the outdoor unit heat exchanger 210 (as shown in Figure 7 ), thereby realizing efficient dirt removal of the fins 211 and achieving the effect of improving the heat exchange efficiency of the outdoor unit heat exchanger 210.

[0103] It should be noted that the specific value of the above can be determined according to the actual use conditions and usage requirements. For example, can be 40 Pa or 42 Pa, etc.

[0104] Further, the method for determining whether there is dirt on the outdoor unit heat exchanger 210 includes: monitoring the air pressure P in the suction pipe of the compressor 230 of the heat pump unit 200. If , it is determined that there is dirt on the outdoor unit heat exchanger 210. When there are deposited impurities in the heat exchange tube 212 or scale forms on the inner wall of the heat exchange tube 212 (hereinafter referred to as dirt in the heat exchange tube 212), the resistance of the refrigerant flowing in the heat exchange tube 212 increases, which will cause the air pressure P in the suction pipe of the compressor 230 of the heat pump unit 200 to rise. Therefore, by monitoring P, when , it can be determined that there is dirt in the heat exchange tube 212 of the outdoor unit heat exchanger 210. At this time, the vibration generating unit 300 starts the fourth vibration mode to vibrate the fins 211, and the fins 211 drive the heat exchange tube 212 to vibrate together, so that the dirt on the inner wall of the heat exchange tube 212 falls off and the dirt deposited in the heat exchange tube 212 floats up. The dirt flows along with the refrigerant in the heat exchange tube 212 until it reaches the filter of the heat pump unit 200 and is filtered out, thereby realizing efficient dirt removal of the heat exchange tube 212 and achieving the effect of extending the service life of the heat pump unit 200.

[0105] It should be noted that the specific value of the above P1 can be determined according to the actual use conditions and usage requirements. For example, P1 can be 33 Pa or 36 Pa, etc.

[0106] In this embodiment, by monitoring and P simultaneously, when Or When, the fourth vibration mode of the vibration generating unit 300 is activated, that is, when there is dirt on either the fin 211 or the heat exchange tube 212, the fourth vibration mode of the vibration generating unit 300 is activated, which can improve the descaling effect. Of course, in other embodiments, it is also possible to only detect One of and P, which can be determined according to actual usage requirements.

[0107] In this embodiment, the magnitude relationship between the vibration frequency f4 of the fourth vibration mode and f1, f2, and f3 is not limited and can be determined according to actual application requirements.

[0108] In other embodiments, it is also possible to judge whether there is dirt on the fin 211 by other means. For example, visually observe whether there is dirt on the fin 211 by manual inspection. In other embodiments, it is also possible to judge whether there is dirt in the heat exchange tube 212 by other means. For example, monitor the pressure difference between the inlet and outlet of the heat exchange tube 212. When the pressure difference between the inlet and outlet of the heat exchange tube 212 reaches a preset pressure difference value, it can be determined that there is dirt in the heat exchange tube 212.

[0109] It should be noted that when the vibration generating element activates the first vibration mode, the second vibration mode, or the third vibration mode, the fin 211 and the heat exchange tube 212 vibrate together. At this time, the dirt on the fin 211 and the heat exchange tube 212 can also fall off, that is, there is also a certain descaling effect at this time.

[0110] Optionally, the defrosting method further includes the following steps: after the vibration generating unit 300 is activated (activating the first vibration mode, the second vibration mode, the third vibration mode, or the fourth vibration mode), monitor the stress value F of the heat exchange tube 212 of the outdoor unit heat exchanger 210; if , then reduce the vibration frequency of the vibration generating unit 300. If the stress value F of the heat exchange tube 212 is too large, the heat exchange tube 212 is likely to crack due to excessive stress. Therefore, after the vibration generating unit 300 is activated, monitor the F value. When When, regardless of which vibration mode the vibration generating unit 300 is in, the vibration frequency of the vibration generating unit 300 should be reduced to reduce the stress value of the heat exchange tube 212 and avoid the problem of the heat exchange tube 212 cracking, providing a guarantee for the normal operation of the heat pump unit 200.

[0111] It should be noted that the specific value of the above F1 can be determined according to actual usage conditions and requirements. For example, F1 can be 50 N / m 2 Or 60 N / m 2 Etc.

[0112] Optionally, the defrosting method also includes the following steps: dynamically adjusting the power of the vibration generating unit 300 according to historical operating parameters (such as historical frosting frequency, historical defrosting effect or defrosting energy consumption per unit time, etc.), for example, increasing the power of the vibration generating unit 300 by 10% in colder areas, etc., so as to achieve the effect of reducing energy consumption on the basis of efficient defrosting, dew removal and descaling.

[0113] In the defrosting method provided in this embodiment, the vibration energy emitted by the vibration generating unit 300 directly acts on dewdrops, frost layer and dirt, so that the dewdrops, frost layer and dirt can fall off quickly, thereby improving the efficiency of dew removal, defrosting and descaling. Compared with the traditional defrosting mode of the heat pump unit 200, the defrosting method can defrost by vibration, does not need to consume a lot of heat to melt the frost layer, and reduces the energy consumption in the defrosting process. The defrosting method combines multiple judgment modes. When the outdoor unit heat exchanger 210 is in zero-level risk, first-level risk, second-level risk, third-level risk and needs to be descaled, it corresponds to the non-vibration mode, which can be automatically adjusted according to the actual situation, achieving intelligent dew removal, defrosting and descaling effects, and also greatly reducing the frequency of the heat pump unit 200 starting the defrosting mode, which plays a role in reducing defrosting energy consumption, improving indoor temperature stability and reducing the impact on the heat pump unit 200.

[0114] This embodiment also provides a heat pump system, which includes a heat pump unit 200 and the above-mentioned vibration-based defrosting device, which removes frost, dew and dirt on the fins 211 of the outdoor heat exchanger 210 of the heat pump unit 200 by vibration, has high efficiency, low energy consumption and can reduce interference with the operation of the heat pump unit 200.

[0115] In another embodiment, the heat pump system adopts the above-mentioned defrosting method, and can perform dew removal, defrosting and descaling in a targeted manner according to actual conditions, thereby realizing intelligent dew removal, defrosting and descaling, which can not only improve efficiency and reduce energy consumption, but also greatly reduce the number of times the heat pump unit 200 starts the defrost mode, thereby playing a role in reducing defrosting energy consumption, improving indoor temperature stability and reducing the impact on the heat pump unit 200.

[0116] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vibration-based defrosting device, characterized in that, Comprising: a connection box (100), the connection box (100) comprising a box cover (110) and a box body (120), the box cover (110) being snap-connected to the box body (120) to form a receiving cavity, the box cover (110) and / or the box body (120) being connected to an outdoor heat exchanger (210) of a heat pump unit (200), and a side of the box body (120) facing away from the receiving cavity being adapted to be in contact with fins (211) of the outdoor heat exchanger (210); a vibration generating unit (300), the vibration generating unit (300) being disposed in the receiving cavity and connected to the box body (120); the vibration directions emitted by the vibration generating unit (300) include a first vibration direction (D1) and a second vibration direction (D2), both the first vibration direction (D1) and the second vibration direction (D2) being parallel to a reference plane, the reference plane being configured to be perpendicular to the side wall of the fin (211), the first vibration direction (D1) being opposite to the second vibration direction (D2), and both the first vibration direction (D1) and the second vibration direction (D2) being configured not to be parallel to the side wall of the fin (211); the vibration directions emitted by the vibration generating unit (300) further include a third vibration direction (D3) and a fourth vibration direction (D4), both the third vibration direction (D3) and the fourth vibration direction (D4) being parallel to the reference plane, the third vibration direction (D3) being opposite to the fourth vibration direction (D4), and both the third vibration direction (D3) and the fourth vibration direction (D4) being configured not to be parallel to the side wall of the fin (211), and the third vibration direction (D3) not being parallel to the first vibration direction (D1); the number of the vibration generating units (300) is multiple; at least one of the multiple vibration generating units (300) is a first vibration generating unit (310), and the rest are second vibration generating units (320), the first vibration generating units (310) and the second vibration generating units (320) being alternately arranged, a vibration wave emitted by the first vibration generating unit (310) along the first vibration direction (D1) being a first vibration wave (311), a vibration wave emitted by the first vibration generating unit (310) along the third vibration direction (D3) being a second vibration wave (312), a vibration wave emitted by the second vibration generating unit (320) along the first vibration direction (D1) being a third vibration wave (321), and a vibration wave emitted by the second vibration generating unit (320) along the third vibration direction (D3) being a fourth vibration wave (322); the first vibration wave (311) emitted by the first vibration generating unit (310) overlaps with the third vibration wave (321) emitted by the second vibration generating unit (320) adjacent to and on one side of the first vibration generating unit (310); And / or, the second vibration wave (312) emitted by the first vibration generating unit (310) overlaps with the fourth vibration wave (322) emitted by the second vibration generating unit (320) that is adjacent to the first vibration generating unit (310) and is located on the other side of the first vibration generating unit (310).

2. The vibration-based defrosting device according to claim 1, wherein The number of the fins (211) is multiple, and the multiple fins (211) are arranged in sequence in the same direction. One side of the box body (120) facing away from the accommodation cavity can be attached to each fin (211).

3. The vibration-based defrosting device according to claim 2, wherein, The orthographic projection of the multiple fins (211) on the box body (120) is a first orthographic projection, and the orthographic projection of the multiple vibration generating units (300) on the box body (120) is a second orthographic projection. The first orthographic projection is located within the second orthographic projection.

4. Defrosting method, characterized in that, Using the vibration-based defrosting device according to any one of claims 1-3, the defrosting method includes the following steps: Judge whether the outdoor unit heat exchanger (210) is dew condensation, and judge whether the outdoor unit heat exchanger (210) is frosting; If the outdoor unit heat exchanger (210) is dew condensation, the vibration generating unit (300) starts the first vibration mode with a vibration frequency of f1; If the outdoor unit heat exchanger (210) is frosted, the vibration generating unit (300) starts the second vibration mode with a vibration frequency of f2, where, .

5. A heat pump system, characterized in that, Including the vibration-based defrosting device according to any one of claims 1-3.

6. A heat pump system, characterized in that, The heat pump system uses the defrosting method according to claim 4 for defrosting.

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