Defrosting device, air conditioner and defrosting method

Abstract

The present invention provides a defrosting device, an air conditioner and a defrosting method. The defrosting device is arranged adjacent to an outdoor heat exchanger, and includes a defrosting module and a supporting and protecting module. The defrosting module includes an ultra-black carbon aerogel unit and a light emitting unit. The light energy emitted by the light emitting unit directly irradiates the ultra-black carbon aerogel unit. The supporting and protecting module is arranged on one side of the defrosting module. The light energy of the light emitting unit is converted into heat energy by utilizing the light-to-heat conversion effect of the ultra-black carbon aerogel, thereby defrosting the outdoor heat exchanger, accelerating the evaporation rate of water generated by reverse cycle defrosting, and preventing it from flowing along the heat exchanger fins to the bottom of the heat exchanger to frost and freeze, thereby shortening the overall defrosting time and improving the defrosting effect of the outdoor unit.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a defrosting device, an air conditioner and a defrosting method. Background Art

[0002] When the air conditioner is running in heating mode, frost is easy to form on the windward side of the outdoor unit heat exchanger. Currently, defrosting is mainly carried out through reverse cycle, but defrosting relying solely on reverse cycle takes a long time and the defrosting is not thorough. Moreover, since the fins of the outdoor unit heat exchanger are installed vertically, the water after the frost on the upper part of the heat exchanger melts will flow down the fins of the heat exchanger and gather at the bottom of the heat exchanger, easily forming a thicker frost layer. At the same time, the outlet in the cooling mode is often located at the bottom, which makes it difficult to melt the frost layer at the bottom of the heat exchanger and there will be residual ice. As the air conditioner runs for an increasing amount of time, the frost or ice layer at the bottom of the heat exchanger will become thicker and thicker, causing the heating capacity to gradually decay, resulting in increased energy consumption, and seriously affecting the performance and reliability of the air conditioner. Summary of the invention

[0003] The problem solved by the invention is how to shorten the defrosting time of an outdoor unit and improve the defrosting effect of the outdoor unit.

[0004] In order to solve the above problems, the present invention provides a defrost device, which is arranged adjacent to the outdoor unit heat exchanger, and comprises a defrost module and a support and protection module. The defrost module comprises an ultra-black carbon aerogel unit and a light-emitting unit, and the light emitted by the light-emitting unit can directly irradiate the ultra-black carbon aerogel unit; the support and protection module is arranged on one side of the defrost module.

[0005] By utilizing the photothermal conversion effect of ultra-black carbon aerogel, a light-emitting unit is set to irradiate the ultra-black carbon aerogel. The ultra-black carbon aerogel converts light energy into heat energy through the photothermal conversion effect, thereby defrosting the outdoor unit heat exchanger. In order to further improve the defrosting effect, it can be used together with the reverse cycle, thereby accelerating the evaporation rate of water generated by the reverse cycle defrosting, preventing it from flowing along the heat exchanger fins to the bottom of the heat exchanger to frost and freeze, thereby shortening the overall defrosting time of the air conditioner outdoor unit and improving the defrosting effect of the outdoor unit.

[0006] Furthermore, the ultra-black carbon aerogel unit comprises an ultra-black carbon aerogel net and an ultra-black carbon aerogel skeleton, and the ultra-black carbon aerogel net is arranged on the ultra-black carbon aerogel skeleton.

[0007] Furthermore, the defrost module further comprises a limiting structure of the ultra-black carbon aerogel unit, and the limiting structure at least limits some degrees of freedom except for the ultra-black carbon aerogel unit being close to or away from the outdoor unit heat exchanger.

[0008] Furthermore, the light emitting unit is arranged on the supporting and protecting module.

[0009] Furthermore, the light intensity of the light emitting unit is adjustable.

[0010] By adjusting the light intensity of the light-emitting unit, the photothermal conversion effect of the ultra-black carbon aerogel unit can be adjusted

[0011] Furthermore, it also includes a driving module, which is connected to the defrost module and can drive the defrost module to be close to or away from the outdoor unit heat exchanger.

[0012] Furthermore, the driving module includes a motor, a driving gear, a main connecting rod, a main connecting rod limiting structure and a movable connecting rod; the main connecting rod is provided with a rack meshing with the driving gear, the main connecting rod is connected to the supporting and protecting module through the main connecting rod limiting structure, and the main connecting rod can slide along the main connecting rod limiting structure; one end of the movable connecting rod is connected to the main connecting rod, and the other end is connected to the ultra-black carbon aerogel unit.

[0013] Furthermore, the supporting and protecting module comprises an outer protecting bracket and an inner protecting bracket, the outer protecting bracket is fixedly connected to the inner protecting bracket, and the outer protecting bracket is fixedly connected to the outer casing of the outdoor unit.

[0014] The supporting protection module adopts a truss structure. The materials of the various rods constituting the truss structure can be the same or different. The size of each rod is easy to adjust, which can reduce the total weight and manufacturing cost of the truss structure while ensuring the use requirements.

[0015] Furthermore, when the outdoor unit of the air conditioner is installed, the heat exchanger of the outdoor unit is tilted toward the defrosting device at a predetermined angle θ.

[0016] Furthermore, the value range of the predetermined angle θ is: 2°≤θ≤5°.

[0017] The predetermined tilting angle ensures that part of the defrosted water can flow onto the ultra-black carbon aerogel unit 111, thereby evaporating this part of water through the photothermal effect, and preventing it from flowing to the bottom of the condenser to frost and freeze due to the low temperature, thereby affecting the heating effect of the air conditioner.

[0018] The present invention also provides an air conditioner, comprising the above-mentioned defrosting device.

[0019] The present invention also provides a defrosting method, comprising:

[0020] After the air conditioner enters the reverse cycle defrost mode, the continuous operation time Δt of the reverse cycle defrost mode is obtained;

[0021] When the continuous operation time Δt is greater than or equal to the first preset time Δt1, that is, Δt≥Δt1, the defrosting device starts to operate, so that the ultra-black carbon aerogel unit adheres to the surface of the outdoor unit heat exchanger;

[0022] After the exit conditions of the reverse cycle defrost mode are met, the air conditioner exits the reverse cycle defrost mode and the defrost device is turned off.

[0023] Furthermore, the continuous operation time of the reverse cycle defrost mode is used to obtain the external disk temperature T of the outdoor unit heat exchanger in real time. 外盘 , and according to the external disk temperature T 外盘 The temperature range determines the current I of the light-emitting unit.

[0024] Furthermore, determining the current I of the light-emitting unit specifically includes the following steps:

[0025] If the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit is the first preset current value I1;

[0026] If the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit is the second preset current value I2;

[0027] And the second preset current value I2 is greater than or equal to the first preset current value I1, that is, I2≥I1.

[0028] Furthermore, the exit condition is: in the reverse cycle defrosting period Δt 逆 within, that is, Δt≤Δt 逆 , outer disk temperature T 外盘 Greater than the first preset temperature T1, that is, T 外盘 >T1.

[0029] Furthermore, the exit condition is: the continuous operation time Δt reaches the reverse cycle defrosting cycle Δt 逆 , that is, Δt=Δt 逆 , outer disk temperature T 外盘 Less than or equal to the first preset temperature T1, that is, T 外盘 ≤T1.

[0030] Furthermore, shutting down the defrost device includes: after the air conditioner exits the reverse cycle defrost mode, after a second preset time Δt2 has passed, controlling the ultra-black carbon aerogel unit to return to an initial position.

[0031] Furthermore, the light emitting unit is turned off after a third preset time Δt3.

[0032] Furthermore, the method further includes: after the air conditioner exits the reverse cycle defrosting mode, obtaining the external disk temperature T in real time 外盘 , according to the continuous running time Δt and the external disk temperature T 外盘, adjust the power-on current I of the light-emitting unit in the next reverse cycle defrost cycle.

[0033] Further, adjusting the power-on current I of the light-emitting unit in the next reverse cycle defrosting cycle specifically includes:

[0034] In the reverse cycle defrosting cycle Δt 逆 within, that is, Δt≤Δt 逆 , outer disk temperature T 外盘 Greater than the first preset temperature T1, that is, T 外盘 >T1, the air conditioner exits the reverse cycle defrost mode;

[0035] When the next reverse cycle defrost cycle begins, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit in the next reverse cycle defrosting cycle is adjusted to: I=η·I1(0<η<1,I1≥I MIN ), when the current value decreases to I MIN After that, the value of the subsequent current no longer decreases, but increases with I MIN Keep running;

[0036] When the next reverse cycle defrost cycle begins, if the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit in the next reverse cycle defrosting cycle is adjusted to: I=ε·I2(0<ε<1,I2≥I MIN ), when the current value decreases to I MIN After that, the value of the subsequent current no longer decreases, but increases with I MIN Keep running.

[0037] Further, adjusting the power-on current I of the light-emitting unit in the next reverse cycle defrosting cycle specifically includes:

[0038] When the continuous running time Δt reaches the reverse cycle defrosting cycle Δt 逆 , that is, Δt=Δt 逆 , outer disk temperature T 外盘 Less than or equal to the first preset temperature T1, that is, T 外盘 ≤T1, the air conditioner exits the reverse cycle defrost mode;

[0039] When exiting the reverse cycle defrost mode, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, when the next reverse cycle defrost cycle starts, if the external disk temperature T 外盘Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit in the next reverse cycle defrosting cycle is adjusted to: I=α·I1(α>1,I1≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running;

[0040] When exiting the reverse cycle defrost mode, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, when the next reverse cycle defrost cycle begins, the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit in the next reverse cycle defrosting cycle is adjusted to I=γ·I2(γ>1,I2≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running;

[0041] When exiting the reverse cycle defrost mode, the outer disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, when the next reverse cycle defrost cycle begins, the outer disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit in the next reverse cycle defrosting cycle is adjusted to I=β·I2(β>γ>1,I2≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running.

[0042] Furthermore, after the air conditioner receives the shutdown command, all parameters are restored to the initial setting state, and then the defrost device is powered off, and the air conditioner is shut down normally.

[0043] Without affecting the original heating and cooling system of the air conditioner, an additional defrost device is used to assist defrosting, which not only solves the problem of serious accumulation of frost or ice at the bottom of the windward side of the outdoor unit heat exchanger without affecting the performance and reliability of the air conditioner, but also speeds up the defrosting process; at the same time, it also protects the staff and the outdoor unit heat exchanger, and the equipment is easy to disassemble and maintain, with a more ornamental appearance, which improves product comfort and added value. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0045] Figure 1 It is a front view of the defrosting device in Example 1;

[0046] Figure 2 is a top view of the defrosting device in Example 1;

[0047] Figure 3 It is a left side view of the defrosting device in Example 1;

[0048] Figure 4 The three-dimensional view of the defrosting device in Example 1 Figure 1 ;

[0049] Figure 5 The three-dimensional view of the defrosting device in Example 1 Figure 2 ;

[0050] Figure 6 It is a schematic diagram of the assembly of the defrost device and the outdoor unit in Example 1;

[0051] Figure 7 Schematic diagram of the defrosting method in Example 2;

[0052] Figure 8 Schematic diagram of the defrosting method in Example 3.

[0053] Description of reference numerals:

[0054] 100-defrosting device; 110-defrosting module; 111-ultra-black carbon aerogel unit; 1111-ultra-black carbon aerogel net; 1112-ultra-black carbon aerogel skeleton; 112-light-emitting unit; 113-limiting structure; 120-driving module; 121-driving gear; 122-main connecting rod; 1221-rack; 123-main connecting rod limiting structure; 124-movable connecting rod; 130-supporting and protecting module; 131-external protecting bracket; 132-internal protecting bracket; 200-outdoor unit; 210-outdoor unit heat exchanger; 220-housing. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0056] A brief description of the technical terms involved in this specific implementation is given below: When referring to the "upper", "lower", "left" and "right" of each structural member, it is based on the structural member being Figure 1 When describing the positional relationship of "up", "down", "left" and "right" for the arrangement of multiple structural parts, it is also defined by the device composed of multiple structural parts. Figure 1 The term "angle" involved in this specific embodiment, when the angle refers to the angle between two surfaces or two plates, without any separate explanation, the angle is the minimum positive angle formed by the intersection of two surfaces or two plates, that is, the value range of the angle is 0°-90°.

[0057] Ultra-black carbon aerogel integrates macropore, mesopore and micropore structures. The vertical macropore structure in ultra-black carbon aerogel is conducive to the transport of water vapor; the mesopore structure is conducive to the thermal insulation of the material; and the micropore structure can construct small-sized conductors, thereby producing a strong thermal electron effect. The disordered structure and small-sized conductor effect can cause a strong angle-independent, wide-band light absorption effect, and the small-sized conductor effect can cause strong thermal electron coupling, thereby enhancing the photocatalytic effect and ultimately improving the photothermal conversion efficiency.

[0058] The present invention utilizes the photothermal conversion effect of the ultra-black carbon gel material and sets a light-emitting unit so that the light-emitting unit irradiates the ultra-black carbon aerogel. The ultra-black carbon aerogel converts light energy into heat energy through the photothermal conversion effect, thereby defrosting the outdoor unit heat exchanger. In order to further improve the defrosting effect, it can be used in conjunction with a reverse cycle to accelerate the evaporation rate of water generated by the reverse cycle defrosting, and prevent it from flowing along the heat exchanger fins to the bottom of the heat exchanger to frost and freeze, thereby shortening the overall defrosting time of the air conditioner outdoor unit and improving the defrosting effect of the outdoor unit.

[0059] Example 1

[0060] A defrost device 100 is arranged adjacent to an outdoor unit heat exchanger 210, and includes a defrost module 110 and a support and protection module 130. The defrost module 110 includes an ultra-black carbon aerogel unit 111 and a light-emitting unit 112. The light energy emitted by the light-emitting unit 112 directly irradiates the ultra-black carbon aerogel unit 111. The support and protection module 130 is arranged on the outside of the defrost module 110 and is connected to the housing 220 of the outdoor unit 200, so as to support and protect the defrost module 110.

[0061] The ultra-black carbon aerogel unit 111 includes an ultra-black carbon aerogel net 1111 and an ultra-black carbon aerogel skeleton 1112 , and the ultra-black carbon aerogel net 1111 is disposed on the ultra-black carbon aerogel skeleton 1112 .

[0062] The light emitting unit 112 is disposed on the supporting and protecting module 130 .

[0063] The light intensity of the light emitting unit 112 is adjustable. Preferably, the light intensity of the light emitting unit 112 can be controlled by controlling the current of the light emitting unit 112 .

[0064] Preferably, the light emitting unit 112 is a light emitting array composed of a plurality of light emitting bodies.

[0065] The defrost module 110 further includes a limiting structure 113 of the ultra-black carbon aerogel unit 111 , and the limiting structure 113 at least limits some degrees of freedom except for the ultra-black carbon aerogel unit 111 approaching or moving away from the outdoor heat exchanger 210 .

[0066] The defrost device 100 further includes a driving module 120 , which is connected to the defrost module 110 and can drive the defrost module 110 to move closer to or farther away from the outdoor heat exchanger 210 .

[0067] The driving module 120 includes a motor (not shown in the figure), a driving gear 121, a main connecting rod 122, a main connecting rod limiting structure 123 and a movable connecting rod 124; the main connecting rod 122 is provided with a rack 1221 meshing with the driving gear 121, and the main connecting rod 122 is connected to the supporting and protecting module 130 through the main connecting rod limiting structure 123, and the main connecting rod 122 can slide along the main connecting rod limiting structure 123; one end of the movable connecting rod 124 is connected to the main connecting rod 122, and the other end is connected to the ultra-black carbon aerogel unit 111.

[0068] Preferably, the other end of the movable connecting rod 124 is connected to the ultra-black carbon aerogel skeleton 1112 ; the movable connecting rod 124 is rotatably connected to the main connecting rod 122 and the ultra-black carbon aerogel unit 111 .

[0069] The supporting and protecting module 130 may be a plate structure or a truss structure. In this embodiment, a truss structure is preferred. The materials of the various rods constituting the truss structure may be the same or different. The size of each rod is easily adjusted, which can reduce the total weight and manufacturing cost of the truss structure while ensuring the use requirements.

[0070] Preferably, the supporting and protecting module 130 includes an outer protecting support 131 and an inner protecting support 132 , the outer protecting support 131 is fixedly connected to the inner protecting support 132 , and the outer protecting support 131 is fixedly connected to the housing 220 of the outdoor unit.

[0071] Preferably, the outer protective bracket 131 is screwed to the housing 220 of the outdoor unit 200 .

[0072] Preferably, the inner protective bracket 132 is a hard component made of plastic or other materials; the light emitting unit 112 is arranged on the inner protective bracket 132 , and the main connecting rod limiting structure 123 is arranged on the outer protective bracket 131 .

[0073] like Figure 1-6 As shown, when defrosting is required, the light-emitting unit 112 is turned on to illuminate the ultra-black carbon aerogel unit 111. The ultra-black carbon aerogel unit 111 converts light energy into heat energy through the photothermal conversion effect. The motor of the driving module 120 drives the main connecting rod 122 to move to the left through the driving gear 121. Under the action of the movable connecting rod 124 and the limiting structure 113, the ultra-black carbon aerogel unit 111 gradually fits the surface of the outdoor heat exchanger 210. When defrosting is completed, the motor of the driving module 120 drives the main connecting rod 122 to move to the right through the driving gear 121. Under the action of the movable connecting rod 124 and the limiting structure 113, the ultra-black carbon aerogel unit 111 gradually moves away from the surface of the outdoor heat exchanger 210 until it returns to its initial position.

[0074] Preferably, when the air conditioner outdoor unit 200 is installed, the outdoor unit heat exchanger 210 is tilted at a certain angle θ (2°≤θ≤5°) toward the side of the defrost device 100 to ensure that a portion of the defrosted water can flow to the ultra-black carbon aerogel unit 111, thereby evaporating this portion of water through the photothermal effect, preventing it from flowing to the bottom of the condenser and frosting due to the low temperature, thereby affecting the heating effect of the air conditioner.

[0075] The defrost device of the present invention does not change the existing structure of the outdoor unit of the air conditioner, and is simple to operate, has good stability, high reliability, and is easy to install. It has low subsequent maintenance costs, but can significantly shorten the defrost time of the air conditioner and improve the defrost effect. The defrost device can also prevent the heat exchanger from being damaged by external forces and protect workers from injury.

[0076] Example 2

[0077] The defrost device in Example 1 can be used to defrost the outdoor unit heat exchanger alone, but in order to shorten the defrost time and improve the defrost effect, it is used in combination with reverse cycle defrost to achieve a better defrost effect. This embodiment specifically describes the defrost method using the two defrost methods in combination.

[0078] See also Figure 7 The process diagram of the defrosting method shown is a defrosting method, which comprises the following steps:

[0079] Step Z100, after the air conditioner enters the reverse cycle defrost mode, the continuous operation time Δt of the reverse cycle defrost mode is obtained;

[0080] The reverse cycle defrost mode means that when the air conditioner meets the defrost conditions, the compressor stops running, the four-way valve is reversed, the compressor restarts, and the air conditioner enters the reverse cycle defrost mode.

[0081] Step Z200 , when the continuous operation time Δt is greater than or equal to the first preset time Δt1, that is, Δt≥Δt1, the defrosting device 100 starts to operate, so that the ultra-black carbon aerogel unit 111 adheres to the surface of the outdoor unit heat exchanger 210 .

[0082] The value range of the first preset time Δt1 is 5s≤Δt1≤10s, and preferably, Δt1 is 8s.

[0083] Step Z300: If the first exit condition or the second exit condition of the reverse cycle defrost mode is met, the air conditioner exits the reverse cycle defrost mode and the defrost device 100 is turned off.

[0084] The first exit condition is: in the reverse cycle defrosting cycle Δt 逆 within, that is, Δt≤Δt 逆 , outer disk temperature T 外盘 Greater than the first preset temperature T1, that is, T 外盘 >T1;

[0085] The second exit condition is: the continuous operation time Δt reaches the reverse cycle defrosting cycle Δt 逆 , that is, Δt=Δt 逆 , outer disk temperature T 外盘 Less than or equal to the first preset temperature T1, that is, T 外盘 ≤T1.

[0086] Reverse cycle defrost cycle Δt 逆 It is the maximum cycle of the built-in reverse cycle defrost of the air conditioner. It is an existing parameter in the air conditioner control logic and may be different for different air conditioners.

[0087] The defrosting device 100 is turned off including: after the air conditioner exits the reverse cycle defrosting mode, after a second preset time Δt2, the ultra-black carbon aerogel unit 111 is controlled to return to the initial position, and the light emitting unit 112 is turned off after a third preset time Δt3.

[0088] The value range of the second preset time Δt2 is 3s≤Δt2≤6s, and preferably, Δt1 is 5s.

[0089] The value range of the third preset time Δt3 is 5s≤Δt3≤15s. Preferably, Δt1 is 10s.

[0090] The defrosting device 100 is closed with a delayed shutdown, thereby ensuring that the water on the ultra-black carbon aerogel unit 111 is completely evaporated, ensuring the defrosting effect, and extending the service life of the device.

[0091] Step Z400: After the air conditioner receives the shutdown command, all parameters are restored to the initial setting state, and then the defrost device 100 is powered off, and the air conditioner is shut down normally.

[0092] Example 3

[0093] The defrosting method in this embodiment is different from the defrosting method in Embodiment 2 in that: the current of the light emitting unit 112 can be adjusted according to the actual defrosting situation.

[0094] See also Figure 8 The process diagram of the defrosting method shown is a defrosting method, which comprises the following steps:

[0095] Step S100, after the air conditioner enters the reverse cycle defrost mode, the continuous operation time Δt of the reverse cycle defrost mode is obtained;

[0096] The reverse cycle defrost mode means that when the air conditioner meets the defrost conditions, the compressor stops running, the four-way valve is reversed, the compressor restarts, and the air conditioner enters the reverse cycle defrost mode.

[0097] Step S200: When the continuous operation time Δt is greater than or equal to the first preset time Δt1, that is, Δt≥Δt1, the defrosting device 100 starts to operate, so that the ultra-black carbon aerogel unit 111 is attached to the surface of the outdoor heat exchanger 210, and the external disk temperature T of the outdoor heat exchanger 210 is obtained in real time. 外盘 .

[0098] The value range of the first preset time Δt1 is 5s≤Δt1≤10s, and preferably, Δt1 is 8s.

[0099] Step S300: According to the external disk temperature T 外盘 The temperature range determines the current of the light emitting unit 112.

[0100] If the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit 112 is the first preset current value I1; if the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit 112 is the second preset current value I2; and the second preset current value I2 is greater than or equal to the first preset current value I1, that is, I2≥I1;

[0101] The first preset temperature T1 and the second preset temperature T2 are finally determined through experiments.

[0102] The lower the temperature of the outer disk, the greater the current flowing through the light-emitting unit, and thus the greater the light intensity shining on the ultra-black carbon aerogel unit 111, and the more heat energy converted from light to heat of the ultra-black carbon aerogel unit 111, thereby accelerating the melting of the frost layer and the evaporation of the water after melting.

[0103] Step S400: If the first exit condition or the second exit condition of the reverse cycle defrost mode is met, the air conditioner exits the reverse cycle defrost mode, and the defrost device 100 is closed with a delayed shutdown.

[0104] The first exit condition is: in the reverse cycle defrosting cycle Δt 逆 within, that is, Δt≤Δt 逆 , outer disk temperature T 外盘 Greater than the first preset temperature T1, that is, T 外盘 >T1;

[0105] The second exit condition is: the continuous operation time Δt reaches the reverse cycle defrosting cycle Δt 逆 , that is, Δt=Δt 逆 , outer disk temperature T 外盘 Less than or equal to the first preset temperature T1, that is, T 外盘 ≤T1.

[0106] Reverse cycle defrost cycle Δt 逆 It is the maximum cycle of the built-in reverse cycle defrost of the air conditioner. It is an existing parameter in the air conditioner control logic and may be different for different air conditioners.

[0107] The delayed shutdown of the defrost device 100 includes: after the air conditioner exits the reverse cycle defrost mode, after a second preset time Δt2, the ultra-black carbon aerogel unit 111 is controlled to return to the initial position, and the light-emitting unit 112 is turned off after a third preset time Δt3.

[0108] The value range of the second preset time Δt2 is 3s≤Δt2≤6s, and preferably, Δt1 is 5s.

[0109] The value range of the third preset time Δt3 is 5s≤Δt3≤15s. Preferably, Δt1 is 10s.

[0110] The defrosting device 100 is closed with a delayed shutdown, thereby ensuring that the water on the ultra-black carbon aerogel unit 111 is completely evaporated, ensuring the defrosting effect, and extending the service life of the device.

[0111] Step S500: After the air conditioner exits the reverse cycle defrosting mode, the external disk temperature T is obtained in real time. 外盘 , according to the continuous running time Δt and the external disk temperature T 外盘 , adjust the power-on current I of the light-emitting unit 112 in the next reverse cycle defrost cycle.

[0112] When the air conditioner meets the first exit condition and exits the reverse cycle defrost mode:

[0113] When the next reverse cycle defrost cycle begins, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T外盘 ≤T1, the current of the light-emitting unit 112 in the next reverse cycle defrosting cycle is adjusted to: I=η·I1(0<η<1, I1≥I MIN ), when the current value decreases to I MIN After that, the value of the subsequent current no longer decreases, but increases with I MIN Keep running;

[0114] When the next reverse cycle defrost cycle begins, if the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit 112 in the next reverse cycle defrosting cycle is adjusted to: I=ε·I2(0<ε<1, I2≥I MIN ), when the current value decreases to I MIN After that, the value of the subsequent current no longer decreases, but increases with I MIN Keep running;

[0115] That is, under the premise of meeting the current defrosting requirements, the energy consumption of the light emitting unit 112 is reduced.

[0116] When the air conditioner meets the second exit condition and exits the reverse cycle defrost mode:

[0117] When exiting the reverse cycle defrost mode, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, when the next reverse cycle defrost cycle starts, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit 112 in the next reverse cycle defrosting cycle is adjusted to: I=α·I1(α>1,I1≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running;

[0118] When exiting the reverse cycle defrost mode, the outer disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, when the next reverse cycle defrost cycle starts, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit 112 in the next reverse cycle defrosting cycle is adjusted to: I=α·I1(α>1,I1≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with IMAX Keep running;

[0119] When exiting the reverse cycle defrost mode, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, when the next reverse cycle defrost cycle begins, the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light emitting unit 112 in the next reverse cycle defrosting cycle is adjusted to I=γ·I2(γ>1,I2≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running;

[0120] When exiting the reverse cycle defrost mode, the outer disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, when the next reverse cycle defrost cycle begins, the outer disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit 112 in the next reverse cycle defrosting cycle is adjusted to I=β·I2(β>γ>1,I2≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running.

[0121] That is, the lower the temperature of the outer disk, the faster the current value of the light-emitting unit increases, making the light-to-heat conversion effect of the ultra-black carbon aerogel unit stronger, the faster the evaporation of defrosting melt water, and the shorter the defrosting time;

[0122] Current parameter I MIN , I1, I2, I MAX The final values ​​of adjustment parameters η, α, ε, β, and γ are determined through experiments.

[0123] Step S600: After the air conditioner receives the shutdown command, all parameters are restored to the initial setting state, and then the defrost device 100 is powered off, and the air conditioner is shut down normally.

[0124] Of course, those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the control device through a computer, and the program can be stored in a computer-readable storage medium. When the program is executed, it may include the processes of the above-mentioned method embodiments, wherein the storage medium may be a memory, a disk, an optical disk, etc.

[0125] Example 4

[0126] The present invention also provides an air conditioner, comprising the above-mentioned defrosting device.

[0127] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0128] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0129] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A defrosting device, characterized in that: The defrost device is arranged adjacent to the outdoor unit heat exchanger (210), and comprises a defrost module (110) and a support and protection module (130); the defrost module (110) comprises an ultra-black carbon aerogel unit (111) and a light-emitting unit (112); light energy emitted by the light-emitting unit (112) can directly irradiate the ultra-black carbon aerogel unit (111); and the support and protection module (130) is arranged on one side of the defrost module (110); The ultra-black carbon aerogel unit (111) comprises an ultra-black carbon aerogel net (1111) and an ultra-black carbon aerogel skeleton (1112), wherein the ultra-black carbon aerogel net (1111) is arranged on the ultra-black carbon aerogel skeleton (1112).

2. A defrosting device according to claim 1, characterized in that: The defrost module (110) further comprises a limiting structure (113) of the ultra-black carbon aerogel unit (111), wherein the limiting structure (113) at least limits some degrees of freedom other than the ultra-black carbon aerogel unit (111) being close to or away from the outdoor unit heat exchanger (210).

3. A defrosting device according to claim 1, characterized in that: The light emitting unit (112) is arranged on the supporting and protecting module (130).

4. The defrosting device according to claim 1, characterized in that: The light intensity of the light emitting unit (112) is adjustable.

5. The defrosting device according to claim 1, characterized in that: It also includes a driving module (120), wherein the driving module (120) is connected to the defrost module (110) and can drive the defrost module (110) to move closer to or farther away from the outdoor unit heat exchanger (210).

6. A defrosting device according to claim 5, characterized in that: The driving module (120) comprises a motor, a driving gear (121), a main connecting rod (122), a main connecting rod limiting structure (123) and a movable connecting rod (124); a rack (1221) meshing with the driving gear (121) is provided on the main connecting rod (122); the main connecting rod (122) is connected to the supporting and protecting module (130) via the main connecting rod limiting structure (123); and the main connecting rod (122) can slide along the main connecting rod limiting structure (123); One end of the movable connecting rod (124) is connected to the main connecting rod (122), and the other end is connected to the ultra-black carbon aerogel unit (111).

7. The defrosting device according to claim 1, characterized in that: The support and protection module (130) comprises an outer protection bracket (131) and an inner protection bracket (132); the outer protection bracket (131) is fixedly connected to the inner protection bracket (132); and the outer protection bracket (131) is fixedly connected to the housing (220) of the outdoor unit.

8. The defrosting device according to claim 1, characterized in that: When the air conditioner outdoor unit (200) is installed, the outdoor unit heat exchanger (210) is tilted toward the defrosting device (100) at a predetermined angle θ.

9. A defrosting device according to claim 8, characterized in that: The value range of the predetermined angle θ is: 2°≤θ≤5°.

10. An air conditioner, characterized in that: It comprises the defrosting device described in any one of claims 1 to 9.

11. A defrosting method, characterized in that: Applied to the air conditioner according to claim 10, the defrosting method comprises: After the air conditioner enters the reverse cycle defrost mode, the continuous operation time Δt of the reverse cycle defrost mode is obtained; When the continuous operation time Δt is greater than or equal to the first preset time Δt1, that is, Δt≥Δt1, the defrosting device (100) starts to operate, so that the ultra-black carbon aerogel unit (111) adheres to the surface of the outdoor unit heat exchanger (210); After the exit condition of the reverse cycle defrost mode is met, the air conditioner exits the reverse cycle defrost mode and the defrost device (100) is turned off.

12. A defrosting method according to claim 11, characterized in that: The continuous operation time of the reverse cycle defrosting mode, and the real-time acquisition of the external disk temperature T of the outdoor unit heat exchanger (210) 外盘 , and according to the external disk temperature T 外盘 The temperature range determines the current I of the light emitting unit (112).

13. A defrosting method according to claim 12, characterized in that: Determining the current I of the light-emitting unit (112) specifically includes the following steps: If the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit (112) is a first preset current value I1; If the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit (112) is a second preset current value I2; And the second preset current value I2 is greater than or equal to the first preset current value I1, that is, I2≥I1.

14. The defrosting method according to claim 11, characterized in that: The exit condition is: in the reverse cycle defrosting cycle Δt 逆 within, that is, Δt≤Δt 逆 , outer disk temperature T 外盘 Greater than the first preset temperature T1, that is, T 外盘 >T1.

15. The defrosting method according to claim 11, characterized in that: The exit condition is: the continuous operation time Δt reaches the reverse cycle defrosting cycle Δt 逆 , that is, Δt=Δt 逆 , external disk temperature T 外盘 Less than or equal to the first preset temperature T1, that is, T 外盘 ≤T1.

16. The defrosting method according to claim 11, characterized in that: The defrosting device (100) is turned off, comprising: after the air conditioner exits the reverse cycle defrosting mode, after a second preset time Δt2 has passed, controlling the ultra-black carbon aerogel unit (111) to return to an initial position.

17. A defrosting method according to claim 16, characterized in that: The light emitting unit (112) is further turned off after a third preset time Δt3.

18. The defrosting method according to claim 11, characterized in that: Also includes: After the air conditioner exits the reverse cycle defrost mode, the external disk temperature T is obtained in real time. 外盘 , according to the continuous running time Δt and the external disk temperature T 外盘 , adjust the power-on current I of the light-emitting unit (112) in the next reverse cycle defrosting cycle.

19. A defrosting method according to claim 18, characterized in that: Adjusting the current I of the light-emitting unit (112) in the next reverse cycle defrosting cycle specifically includes: In the reverse cycle defrosting cycle Δt 逆 within, that is, Δt≤Δt 逆 , outer disk temperature T 外盘 Greater than the first preset temperature T1, that is, T 外盘 >T1, the air conditioner exits the reverse cycle defrost mode; When the next reverse cycle defrost cycle begins, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit (112) in the next reverse cycle defrosting cycle is adjusted to: I=η·I1(0<η<1, I1≥I MIN ), when the current value decreases to I MIN After that, the value of the subsequent current no longer decreases, but increases with I MIN Keep running; When the next reverse cycle defrost cycle begins, if the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit (112) in the next reverse cycle defrosting cycle is adjusted to: I=ε·I2(0<ε<1, I2≥I MIN ), when the current value decreases to I MIN After that, the value of the subsequent current no longer decreases, but increases with I MIN Keep running.

20. The defrosting method according to claim 18, characterized in that: Adjusting the current I of the light-emitting unit (112) in the next reverse cycle defrosting cycle specifically includes: When the continuous running time Δt reaches the reverse cycle defrosting cycle Δt 逆 , that is, Δt=Δt 逆 , outer disk temperature T 外盘 Less than or equal to the first preset temperature T1, that is, T 外盘 ≤T1, the air conditioner exits the reverse cycle defrost mode; When exiting the reverse cycle defrost mode, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, when the next reverse cycle defrost cycle starts, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, the current of the light-emitting unit (112) in the next reverse cycle defrosting cycle is adjusted to: I = α·I1 (α>1, I1≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running; When exiting the reverse cycle defrost mode, if the external disk temperature T 外盘 Less than or equal to the first preset temperature T1 and greater than or equal to the second preset temperature T2, that is, T2≤T 外盘 ≤T1, when the next reverse cycle defrost cycle begins, the external disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light emitting unit (112) in the next reverse cycle defrosting cycle is adjusted to I=γ·I2(γ>1,I2≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running; When exiting the reverse cycle defrost mode, the outer disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, when the next reverse cycle defrost cycle begins, the outer disk temperature T 外盘 is lower than the second preset temperature T2, that is, T 外盘 <T2, the current of the light-emitting unit (112) in the next reverse cycle defrosting cycle is adjusted to I=β·I2(β>γ>1, I2≤I MAX ), when the current value increases to I MAX After that, the value of the subsequent current no longer increases, but increases with I MAX Keep running.

21. The defrosting method according to claim 11, characterized in that: It also includes that after the air conditioner receives the shutdown command, all parameters are restored to the initial setting state, and then the defrosting device (100) is powered off, and the air conditioner is shut down normally.

Images