Defrosting device and air conditioner

Abstract

The utility model relates to the technical field of air conditioner defrosting, and discloses a defrosting device which comprises a heat dissipation device used for being arranged corresponding to an electric control board so as to dissipate heat of the electric control board; the heat absorption pipeline is arranged in the heat dissipation device, and the heat obtained by the heat dissipation device from the electric control board is absorbed by fluid filled in the heat absorption pipeline; the heat release pipeline communicates with the heat absorption pipeline to form a loop and is used for receiving fluid flowing out of the heat absorption pipeline; and one part of the heat release pipeline is used for being arranged corresponding to the outdoor heat exchanger, so that heat of the fluid is transferred to the outdoor heat exchanger, and the outdoor heat exchanger is defrosted. Therefore, the outdoor heat exchanger is defrosted by utilizing heat dissipation of the electric control board through the heat dissipation device, the heat absorption pipeline and the heat release pipeline, non-stop defrosting can be realized, the heating effect of the indoor side is not influenced, and the user experience is improved. The utility model further discloses the air conditioner.

Description

Technical Field

[0001] This application relates to the technical field of air conditioner defrosting, for example, to a defrosting device and an air conditioner. Background Art

[0002] When the air conditioner operates in heating mode, the outdoor unit will generate a relatively thick frost layer due to long-term refrigeration. The frost layer will affect the heat exchange of the outdoor heat exchanger, thereby reducing the capacity and energy efficiency of the air conditioning system.

[0003] Currently, the mainstream defrosting method of air conditioners is mainly defrosting by reversing the four-way valve. Among them, defrosting by reversing the four-way valve is to stop the machine and reverse the four-way valve to switch the indoor unit from the heating mode to the cooling mode. In this way, the outdoor unit of the air conditioner operates in the heating mode, and then melts the frost layer on the surface of the condenser.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] Defrosting by reversing the four-way valve is also called stop defrosting. This defrosting method will reduce the heating effect on the indoor side of the air conditioner and seriously affect the user experience.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0008] The embodiments of the present disclosure provide a defrosting device and an air conditioner to reduce the impact of air conditioner defrosting on the heating effect on the indoor side.

[0009] In some embodiments, the defrosting device includes: a heat dissipation device, which is arranged corresponding to the electronic control board to dissipate heat from the electronic control board; a heat absorption pipeline, which is arranged in the heat dissipation device and uses the fluid filled inside the heat absorption pipeline to absorb the heat obtained by the heat dissipation device from the electronic control board; a heat release pipeline, which is connected to the heat absorption pipeline to form a loop and is used to receive the fluid flowing out of the heat absorption pipeline; and a part of the heat release pipeline is arranged corresponding to the outdoor heat exchanger to transfer the heat of the fluid to the outdoor heat exchanger for defrosting the outdoor heat exchanger.

[0010] In some embodiments, the heat dissipation device includes: a heat dissipation plate with a receiving cavity formed inside, wherein the heat absorption pipeline is disposed in the receiving cavity; first through holes and second through holes are formed at positions on the wall surface of the heat dissipation plate corresponding to the receiving cavity, so that the liquid inlet end and the liquid outlet end of the heat absorption pipeline respectively pass through the first through hole and the second through hole and are communicated with the heat release pipeline to form a loop.

[0011] In some embodiments, the heat release pipeline includes: a defrosting pipeline disposed on the outer surface of the outdoor heat exchanger and communicated with the heat absorption pipeline to form a loop, so as to defrost the outdoor heat exchanger by using the heat of the fluid.

[0012] In some embodiments, the defrosting pipeline is wound around the outer surface of the outdoor heat exchanger for multiple turns.

[0013] In some embodiments, the heat release pipeline further includes: a liquid outlet pipeline connected between the liquid outlet end of the heat absorption pipeline and the liquid inlet end of the defrosting pipeline; a liquid return pipeline connected between the liquid outlet end of the defrosting pipeline and the liquid inlet end of the heat absorption pipeline; wherein, the defrosting pipeline includes multiple defrosting branches, the liquid inlet ends of the multiple defrosting branches are connected to the liquid outlet end of the liquid outlet pipeline through a first valve body, and the diameter of each defrosting branch is smaller than the diameter of the liquid outlet pipeline; the liquid outlet ends of the multiple defrosting branches are connected to the liquid inlet end of the liquid return pipeline through a second valve body, and the diameter of each defrosting branch is smaller than the diameter of the liquid return pipeline.

[0014] In some embodiments, the defrosting device further includes: a heat storage tank connected between the liquid outlet end of the heat absorption pipeline and the liquid inlet end of the heat release pipeline, for receiving and storing the fluid flowing out of the heat absorption pipeline.

[0015] In some embodiments, the defrosting device further includes: an electric heating part disposed in the heat storage tank, for heating the fluid in the heat storage tank.

[0016] In some embodiments, the defrosting device further includes: a on-off valve connected between the liquid outlet end of the heat absorption pipeline and the liquid inlet end of the heat release pipeline, which can be controlled to open or close to control the flow of the fluid between the heat absorption pipeline and the heat release pipeline.

[0017] In some embodiments, when the outdoor ambient temperature is greater than or equal to the first temperature threshold and the temperature of the fluid in the heat absorption pipeline is greater than or equal to the second temperature threshold, the on-off valve is in an open state, so that the heat absorption pipeline and the heat release pipeline are in a connected state; when the temperature of the fluid in the heat absorption pipeline is less than the second temperature threshold, the on-off valve is in a closed state, so that the heat absorption pipeline and the heat release pipeline are in a disconnected state.

[0018] In some embodiments, the defrosting device further includes: a circulation pump connected to the heat absorption pipeline or the heat release pipeline, which can be controlled to open or close, for providing power for the circulation of the fluid.

[0019] In some embodiments, the air conditioner includes the aforementioned defrosting device.

[0020] The defrosting device and the air conditioner provided by the embodiments of the present disclosure can achieve the following technical effects:

[0021] While the heat dissipation device dissipates heat from the electronic control board, the heat absorption pipeline arranged in the heat dissipation device is used to obtain the heat dissipated by the electronic control board, thereby obtaining a high-temperature fluid. The heat release pipeline is connected to the heat absorption pipeline to form a loop. The high-temperature fluid enters the heat release pipeline and transfers heat to the outdoor heat exchanger through the part corresponding to the outdoor heat exchanger in the heat release pipeline, thereby defrosting the outdoor heat exchanger. In this way, through the heat dissipation device, the heat absorption pipeline and the heat release pipeline, the outdoor heat exchanger is defrosted by using the heat dissipation of the electronic control board, and defrosting without stopping the machine can be achieved. Furthermore, the heating effect on the indoor side will not be affected, and the user experience is improved.

[0022] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present application. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a proportional limitation, and among them:

[0024] Figure 1 is a schematic structural diagram of a defrosting device provided by an embodiment of the present disclosure;

[0025] Figure 2 is a schematic connection diagram of a heat exchange device, a heat absorption pipeline and a heat release pipeline provided by an embodiment of the present disclosure;

[0026] Figure 3 is a schematic structural diagram of another defrosting device provided by an embodiment of the present disclosure;

[0027] Figure 4 is a schematic structural diagram of another defrosting device provided by an embodiment of the present disclosure;

[0028] Figure 5 is a schematic connection diagram of another heat exchange device, a heat absorption pipeline and a heat release pipeline provided by an embodiment of the present disclosure;

[0029] Figure 6 is a schematic diagram of an air conditioner provided by an embodiment of the present disclosure.

[0030] Reference Signs:

[0031] 1. Defrosting device; 10. Heat dissipation device; 11. Heat dissipation plate; 12. Accommodating cavity; 13. First through hole; 14. Second through hole; 15. Fins; 20. Heat absorption pipeline; 30. Heat release pipeline; 31. Defrosting pipeline; 311. Defrosting branch; 32. Liquid return pipeline; 33. Liquid outlet pipeline; 34. First valve body; 35. Second valve body; 40. Heat storage tank; 41. Liquid inlet of the heat storage tank; 42. Liquid outlet of the heat storage tank; 50. Electric heating part; 60. On-off valve; 70. Circulation pump;

[0032] 2. Electric control board;

[0033] 3. Outdoor heat exchanger;

[0034] 4. Air conditioner. Specific embodiments

[0035] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The attached drawings are for reference and illustration only, and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to provide a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner.

[0036] In the embodiments of the present disclosure, the terms "first", "second", etc. in the description and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0037] In the embodiments of the present disclosure, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their embodiments, and are not used to limit that the indicated devices, elements or components must have a specific orientation, or be constructed and operated in a specific orientation. And, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0038] In addition, the terms "arranged", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, components, or parts. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0039] Unless otherwise specified, the term "plurality" means two or more.

[0040] In the embodiments of the present disclosure, the character " / " indicates an "or" relationship between the preceding and following objects. For example, A / B means: A or B.

[0041] The term "and / or" is an associative relationship describing an object, indicating that there can be three relationships. For example, A and / or B means: A or B, or, A and B.

[0042] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0043] Combined with Figure 1 As shown, the embodiments of the present disclosure provide a defrosting device 1, including: a heat dissipation device 10, a heat absorption pipeline 20, and a heat release pipeline 30. The heat dissipation device 10 is arranged corresponding to the electronic control board 2. When the electronic control board 2 operates, the heat generated by it is dissipated to the outside through the heat dissipation device 10. The heat absorption pipeline 20 is arranged in the heat dissipation device 10, and a fluid is filled in the heat absorption pipeline 20. The fluid in the heat absorption pipeline 20 absorbs the heat obtained by the heat dissipation device 10 from the electronic control board 2 and becomes a high-temperature fluid. The heat release pipeline 30 is connected to the heat absorption pipeline 20 to form a loop to receive the high-temperature fluid flowing out of the heat absorption pipeline 20. At the same time, a part of the heat release pipeline 30 is arranged corresponding to the outdoor heat exchanger 3, and the heat of the high-temperature fluid can be transferred to the outdoor heat exchanger 3, so as to defrost the outdoor heat exchanger 3. The fluid after heat release returns to the heat absorption pipeline 20 to absorb the heat dissipated by the electronic control board 2 again. In this way, the heat dissipation of the electronic control board 2 can be continuously absorbed in a cycle.

[0044] By using the defrosting device 1 provided in the embodiments of the present disclosure, while the heat dissipation device 10 dissipates heat from the electronic control board 2, the heat absorption pipeline 20 arranged in the heat dissipation device 10 is used to obtain the heat dissipated by the electronic control board 2, thereby obtaining a high-temperature fluid. The heat release pipeline 30 is communicated with the heat absorption pipeline 20 to form a loop. The high-temperature fluid enters the heat release pipeline 30, and transfers the heat to the outdoor heat exchanger 3 through the part of the heat release pipeline 30 corresponding to the outdoor heat exchanger 3, thereby defrosting the outdoor heat exchanger 3. In this way, through the heat dissipation device 10, the heat absorption pipeline 20 and the heat release pipeline 30, the heat dissipation of the electronic control board 2 is used to defrost the outdoor heat exchanger 3, so that defrosting can be achieved without stopping the machine, and thus the heating effect on the indoor side will not be affected, improving the user experience.

[0045] In addition, the heat dissipation of the electronic control board 2 is effectively utilized, saving energy and being environmentally friendly.

[0046] Combined with Figure 1 and Figure 2 As shown, the heat dissipation device 10 includes: a heat dissipation plate 11. An accommodation cavity 12 is arranged inside the heat dissipation plate 11, and the heat absorption pipeline 20 is arranged in the accommodation cavity 12. A first through hole 13 and a second through hole 14 are arranged on one side wall of the heat dissipation plate 11, and the first through hole 13 and the second through hole 14 correspond to and communicate with the accommodation cavity 12. In this way, the liquid outlet end of the heat absorption pipeline 20 can pass through the first through hole 13 and be connected to the liquid inlet end of the heat release pipeline 30, and the liquid inlet end of the heat absorption pipeline 20 can pass through the second through hole 14 and be connected to the liquid outlet end of the heat release pipeline 30, thereby enabling the heat absorption pipeline 20 to be communicated with the heat release pipeline 30 to form a loop.

[0047] Optionally, fins 15 are arranged at the bottom of the heat dissipation plate 11 to increase the heat dissipation area and improve the heat dissipation effect.

[0048] Combined with Figure 1 As shown, the heat release pipeline 30 includes: a defrosting pipeline 31. The defrosting pipeline 31 is arranged on the outer surface of the outdoor heat exchanger 3, and both ends of the defrosting pipeline 31 are respectively connected to the liquid inlet end and the liquid outlet end of the heat absorption pipeline 30 and form a loop for fluid circulation. The high-temperature fluid in the defrosting pipeline 31 transfers the heat to the outer surface of the outdoor heat exchanger 3, thereby defrosting the outdoor heat exchanger 3.

[0049] Optionally, the heat release pipeline 30 further includes: a liquid outlet pipeline 33 and a liquid return pipeline 32. The liquid inlet end of the liquid outlet pipeline 33 (i.e., the liquid inlet end of the heat release pipeline 30) is communicated with the liquid outlet end of the heat absorption pipeline 20, and the liquid outlet end of the liquid outlet pipeline 33 is communicated with the liquid inlet end of the defrosting pipeline 31. The liquid inlet end of the liquid return pipeline 32 is communicated with the liquid outlet end of the defrosting pipeline 31, and the liquid outlet end of the liquid return pipeline 32 (i.e., the liquid outlet end of the heat release pipeline 30) is communicated with the liquid inlet end of the heat absorption pipeline 20, for transporting the low-temperature fluid formed after heat exchange with the outdoor heat exchanger 3 into the heat absorption pipeline 20 to re-absorb the heat dissipated by the electronic control board 2. Wherein, the diameter of the defrosting pipeline 31 is smaller than the diameter of the liquid outlet pipeline 33 and smaller than the diameter of the liquid return pipeline 32. In this way, the defrosting pipeline 31 with a small diameter is arranged on the outer surface of the outdoor heat exchanger 3, which will not block too much surface area of the outdoor heat exchanger 3, thereby reducing the influence on the heat exchange between the outdoor heat exchanger 3 and the outdoor environment.

[0050] Optionally, referring again to Figure 1 , the defrosting pipeline 31 is wound around the outer surface of the outdoor heat exchanger 3 for multiple turns. In this way, the defrosting pipeline 31 is arranged around the outdoor heat exchanger 3 to improve the defrosting efficiency.

[0051] Optionally, there is a set distance L between the multiple turns wound by the defrosting pipeline 31. In this way, it can not only make the temperature on the outer surface of the outdoor heat exchanger relatively uniform, make full use of the heat of each turn of the defrosting pipeline 31, but also avoid the concentrated shielding of the outer surface of the outdoor heat exchanger 3 by the defrosting pipeline 31, thereby reducing the influence on the heat exchange between the outdoor heat exchanger 3 and the outdoor environment.

[0052] Optionally, as shown in combination with Figure 3 , the defrosting pipeline 31 further includes multiple defrosting branches 311. The liquid inlet ends of the multiple defrosting branches 311 are communicated with the liquid outlet end of the liquid outlet pipeline 33 through a first valve body 34. In this way, the multiple defrosting branches 311 are equivalent to liquid separation branches for separating the liquid of the liquid outlet pipeline 33. Accordingly, the diameters of the multiple defrosting branches 311 are all smaller than the diameter of the liquid outlet pipeline 33. Correspondingly, the liquid outlet ends of the multiple defrosting branches 311 are communicated with the liquid inlet end of the liquid return pipeline 32 through a second valve body 35. In this way, the liquid return pipeline 32 is a summary of the fluids of the multiple defrosting branches 311. Therefore, the diameter of the liquid return pipeline 32 is larger than the diameter of each defrosting branch 311.

[0053] Optionally, there is a set distance L between two adjacent defrosting branches 311 among the multiple defrosting branches 311. In this way, it can not only make the temperature on the outer surface of the outdoor heat exchanger relatively uniform, make full use of the heat of the multiple defrosting branches 311, but also avoid the concentrated shielding of the outer surface of the outdoor heat exchanger 3 by the multiple defrosting branches 311, thereby reducing the influence on the heat exchange between the outdoor heat exchanger 3 and the outdoor environment.

[0054] As shown in combination with Figure 4 andFigure 5 As shown, the defrosting device 1 further includes a heat storage tank 40. A liquid inlet 41 and a liquid outlet 42 are provided on the wall of the heat storage tank 40. The liquid inlet 41 of the heat storage tank 40 is communicated with the liquid outlet end of the heat absorption pipeline 20, and the liquid outlet 42 is communicated with the liquid inlet end of the heat release pipeline 30 (that is, the liquid inlet end of the defrosting pipeline 31; when the heat release pipeline 30 includes a liquid outlet pipeline 33, the liquid inlet end of the heat release pipeline 30 is the liquid inlet end of the liquid outlet pipeline 33). The high-temperature fluid flowing out of the heat absorption pipeline 20 enters the heat storage tank 40 for storage. On the one hand, the heat storage tank 40 can store more fluid and can provide sufficient high-temperature fluid for defrosting the outdoor heat exchanger 3. On the other hand, the heat storage tank 40 can prevent the heat loss of the fluid to ensure the temperature required for defrosting the outdoor heat exchanger 3.

[0055] Optionally, the liquid outlet 42 is arranged at the bottom of the heat storage tank 40 to facilitate the outflow of the high-temperature fluid.

[0056] Optionally, the defrosting device 1 further includes an electric heating part 50. The electric heating part 50 is arranged in the heat storage tank 40 and is used to heat the fluid in the heat storage tank 40 to ensure that the temperature of the fluid meets the defrosting requirements.

[0057] Optionally, the electric heating part 50 is communicatively connected to the controller and can be controlled by the controller to be turned on or off. In this way, the electric heating part 50 can be selectively controlled to be turned on under necessary circumstances to save energy.

[0058] Optionally, the electric heating part 50 is an electric heating rod, an electric heating wire, etc.

[0059] Optionally, referring again to Figures 1 to 5 , the defrosting device 1 further includes a on-off valve 60. The inlet of the on-off valve 60 is communicated with the liquid outlet end of the heat absorption pipeline 20, and the outlet of the on-off valve 60 is communicated with the liquid inlet end of the heat release pipeline 30 (that is, the liquid inlet end of the defrosting pipeline 31; when the heat release pipeline 30 includes a liquid outlet pipeline 33, the liquid inlet end of the heat release pipeline 30 is the liquid inlet end of the liquid outlet pipeline 33). The on-off valve 60 is communicatively connected to the controller and can thus be controlled to be opened or closed to control the circulating flow of the fluid between the heat absorption pipeline 20 and the heat release pipeline 30. In this way, the timing of using the fluid to defrost the outdoor heat exchanger 3 can be controlled to save energy.

[0060] When the heat storage tank 40 is connected between the liquid outlet end of the heat absorption pipeline 20 and the liquid inlet end of the heat release pipeline 30, the on-off valve 60 is connected between the liquid outlet 42 of the heat storage tank 40 and the liquid inlet end of the heat release pipeline 30, that is, the inlet of the on-off valve 60 is communicated with the liquid outlet 42 of the heat storage tank 40. In this way, when the on-off valve 60 is controlled to be in the closed state, the high-temperature fluid is stored in the heat storage tank 40. When the on-off valve 60 is controlled to be in the open state, the high-temperature fluid enters the defrosting pipeline 31.

[0061] Optionally, referring again to Figure 2 and Figure 5 , the defrosting device 1 further includes: a circulation pump 70. The circulation pump 70 is connected to the heat absorption pipeline 20 or the heat release pipeline 30. The circulation pump 70 is communicatively connected to the controller and can be controlled to be turned on or off. When the circulation pump 70 is controlled to be in the on state, the circulation pump 70 provides power for the circulation of the fluid in the heat absorption pipeline 20 and the heat release pipeline 30 to improve the heat absorption and release efficiency, and thus improve the defrosting efficiency.

[0062] When the air conditioner operates, the fluid in the heat absorption pipeline 20 is continuously heated and raised in temperature by the heat dissipated by the electronic control board 2 and becomes a high-temperature fluid. When the air conditioner operates in the heating mode, the outdoor ambient temperature Tao is obtained by setting an outdoor temperature sensor or through a cloud server.

[0063] When Tao≥T1, the temperature T of the fluid in the heat absorption pipeline 20 is obtained by a temperature sensor provided on the outer wall of the heat absorption pipeline 20 x (If the defrosting device 1 includes a heat storage tank 40, the temperature T of the fluid in the heat storage tank 40 is obtained by a temperature sensor provided in the heat storage tank 40 c ). When the fluid temperature T x (or T c ) rises to the second temperature threshold T2, that is, T x ≥T2 (or T c ≥T2), the controller controls the outdoor fan speed to decrease and controls the on-off valve 60 to open, so that the high-temperature fluid enters the defrosting pipeline 31, and the outer surface of the outdoor heat exchanger 3 is defrosted by using the high-temperature fluid. The fluid that becomes low-temperature after heat release returns to the heat absorption pipeline 20 and is continuously heated again. When the fluid temperature T x (or T c ) drops below the point temperature threshold T3, that is, T x <T3 (or T c <T3), the controller controls the on-off valve 60 to close, and at the same time, controls the outdoor fan speed to recover.

[0064] When Tao<T1, the control of the on-off valve 60 and the switch of the outdoor fan is the same as above and will not be elaborated here. At the same time, when controlling the on-off valve 60 to open, the electric heating part 50 is also controlled to open. In this way, when the outdoor ambient temperature is relatively low, the electric heating part 50 is controlled to participate in fluid heating so that the fluid temperature meets the defrosting requirements.

[0065] Optionally, T1 is the first temperature threshold, T2 is the second temperature threshold, and T3 is the third temperature threshold. Optionally, the value of T1 is 3°C.

[0066] Combined with Figure 6As shown in the figure, an embodiment of the present disclosure further provides an air conditioner 4, which includes the defrosting device 1 described above. The heat dissipation device 10 of the defrosting device 1 is arranged below the electronic control board 2 to dissipate heat from the electronic control board 2. A part of the heat release pipeline 30 is wound around the outer surface of the outdoor heat exchanger 3, that is, the defrosting pipeline 31 is wound around the outer surface of the outdoor heat exchanger 3.

[0067] By using the air conditioner 4 provided by the embodiment of the present disclosure and the defrosting device 1, while the heat dissipation device 10 dissipates heat from the electronic control board 2, the heat absorption pipeline 20 arranged in the heat dissipation device 10 is also used to obtain the heat dissipated by the electronic control board 2, so as to obtain a high-temperature fluid. The heat release pipeline 30 is connected to the heat absorption pipeline 20 to form a loop. The high-temperature fluid enters the heat release pipeline 30, and the heat is transferred to the outdoor heat exchanger 3 through the part of the heat release pipeline 30 corresponding to the outdoor heat exchanger 3, so as to defrost the outdoor heat exchanger 3. In this way, through the heat dissipation device 10, the heat absorption pipeline 20 and the heat release pipeline 30, the defrosting of the outdoor heat exchanger 3 is carried out by using the heat dissipation of the electronic control board 2, and the defrosting without stopping the machine can be realized, and further the heating effect on the indoor side will not be affected, improving the user experience.

[0068] The above description and the drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, the individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A defrosting device, characterized in that: include: A heat dissipation device, which is arranged corresponding to the electric control board to dissipate heat from the electric control board; The heat absorbing pipeline is arranged in the heat dissipating device and uses the fluid filled in the heat absorbing pipeline to absorb the heat obtained by the heat dissipating device from the electric control board; The heat release pipeline is connected with the heat absorption pipeline to form a loop for receiving the fluid flowing out of the heat absorption pipeline; and a part of the heat release pipeline is used to be set corresponding to the outdoor heat exchanger to transfer the heat of the fluid to the outdoor heat exchanger to defrost the outdoor heat exchanger.

2. The defrosting device according to claim 1, characterized in that: The heat sink includes: The heat dissipation plate has a receiving cavity inside, wherein the heat absorption pipeline is arranged in the receiving cavity; The wall of the heat sink and the position corresponding to the accommodating cavity are provided with a first through hole and a second through hole, so that the liquid inlet and the liquid outlet of the heat absorption pipeline pass through the first through hole and the second through hole respectively and connect with the heat release pipeline to form a loop.

3. The defrosting device according to claim 1, characterized in that: The heat release pipeline includes: The defrost pipeline is arranged on the outer surface of the outdoor heat exchanger and is connected with the heat absorption pipeline to form a loop, so as to use the heat of the fluid to defrost the outdoor heat exchanger.

4. The defrosting device according to claim 3, characterized in that: The defrost pipeline is wound around the outer surface of the outdoor heat exchanger multiple times.

5. The defrosting device according to claim 3, characterized in that: The heat release pipeline also includes: The liquid outlet pipeline is connected between the liquid outlet end of the heat absorption pipeline and the liquid inlet end of the defrost pipeline; The liquid return pipeline is connected between the liquid outlet of the defrost pipeline and the liquid inlet of the heat absorption pipeline; The defrost pipeline includes a plurality of defrost branches, the liquid inlet ends of the plurality of defrost branches are connected to the liquid outlet end of the liquid outlet pipeline through the first valve body, and the diameter of each defrost branch is smaller than the diameter of the liquid outlet pipeline; The liquid outlet ends of the plurality of defrost branches are connected to the liquid inlet end of the liquid return pipeline through the second valve body, and the diameter of each defrost branch is smaller than the diameter of the liquid return pipeline.

6. The defrosting device according to any one of claims 1 to 5, characterized in that: Also includes: The heat storage tank is connected between the liquid outlet end of the heat absorption pipeline and the liquid inlet end of the heat release pipeline, and is used to receive and store the fluid flowing out of the heat absorption pipeline.

7. The defrosting device according to claim 6, characterized in that: Also includes: The electric heating unit is arranged in the heat storage tank and is used for heating the fluid in the heat storage tank.

8. The defrosting device according to any one of claims 1 to 5, characterized in that: Also includes: The on-off valve is connected between the liquid outlet of the heat absorption pipeline and the liquid inlet of the heat release pipeline, and can be controlled to open or close to control the flow of fluid between the heat absorption pipeline and the heat release pipeline.

9. The defrosting device according to claim 8, characterized in that: When the outdoor ambient temperature is greater than or equal to the first temperature threshold, and the temperature of the fluid in the heat absorption pipeline is greater than or equal to the second temperature threshold, the on-off valve is in an open state, so that the heat absorption pipeline and the heat release pipeline are in a connected state; When the temperature of the fluid in the heat absorption pipeline is lower than the third temperature threshold, the on-off valve is in a closed state, so that the heat absorption pipeline and the heat release pipeline are in a disconnected state.

10. The defrosting device according to any one of claims 1 to 5, characterized in that: Also includes: The circulation pump is connected to the heat absorption pipeline or the heat release pipeline and can be opened or closed under control to provide power for the circulation of the fluid.

11. An air conditioner, characterized in that: The invention comprises a defrosting device as claimed in any one of claims 1 to 10.

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