Defrosting control device and method and air conditioning unit

Abstract

The invention discloses a defrosting control device and method and an air conditioning unit. The defrosting control method comprises the steps that adjacent modules enter defrosting in a staggered mode; the temperature of the environment where the module entering defrosting is located is obtained; and the adjacent non-defrosting modules carry out temperature compensation on the adjacent non-defrosting modules according to the environment temperature, defrosting parameters are dynamically adjusted, defrosting judgment is carried out again according to the adjusted defrosting parameters, and the defrosting entering time of the adjacent non-defrosting modules is prolonged. In this way, the multiple modules of the unit coordinate with one another, the influence of the environment temperature on defrosting is reduced, defrosting is prevented from entering the unit in advance, the defrosting frequency is effectively reduced, the defrosting energy efficiency is improved, and the unit operation cost is reduced.

Description

Technical Field

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

[0002] Under low-temperature conditions, frost on the evaporator surface of a multi-module air conditioner significantly reduces heat exchange efficiency. Therefore, defrosting is necessary—periodically removing the frost from the evaporator surface to ensure efficient operation. The defrost process typically involves switching the system to cooling mode, using high-temperature refrigerant or hot air to heat the evaporator surface, melting the frost and discharging it.

[0003] Currently, mainstream traditional defrost technologies mainly use two control methods: time control method (defrost is triggered according to a fixed cycle) or temperature difference control method (based on the temperature difference between the evaporator and the ambient temperature). However, the judgment logic of traditional defrost technology is single: the time control method is prone to unnecessary defrost operations due to changes in environmental conditions, and the temperature difference control method is sensitive to sensor accuracy and prone to misjudgment. Both will lead to multiple starts of the unit for defrost, reduced defrost energy efficiency, and increased unit operating costs. Summary of the Invention

[0004] The present invention provides a defrost control device, method and air-conditioning unit, which are used to solve the problem that the defrost method in the prior art leads to an increase in the number of defrost times and a decrease in the defrost energy efficiency.

[0005] The technical solution of the present invention is a defrost control method, comprising:

[0006] Adjacent modules are misaligned and enter defrosting;

[0007] Obtaining the ambient temperature of the module entering defrosting;

[0008] The adjacent non-defrosting modules perform temperature compensation on themselves according to the ambient temperature, dynamically adjust defrosting parameters, and re-determine defrosting according to the adjusted defrosting parameters, thereby extending the defrosting time of the adjacent non-defrosting modules.

[0009] Further, including:

[0010] Obtain the placement and wind direction of the modules in the unit;

[0011] The adjacent non-defrosted modules located upwind of the module that is undergoing defrosting are defrosted earlier than the adjacent non-defrosted modules located downwind of the module that is undergoing defrosting.

[0012] Further, including:

[0013] Obtaining a temperature difference ∆T between an ambient temperature T1 of the module after defrosting and an ambient temperature T2 during defrosting;

[0014] The non-defrosted modules adjacent to the module entering defrost perform temperature compensation on themselves according to the temperature difference ∆T and dynamically adjust the defrost parameters.

[0015] Furthermore, the defrost parameters include a defrost interval time;

[0016] Adjusted defrost interval time ;

[0017] Among them, tb is the defrost interval time before adjustment, and x is the adjustment coefficient.

[0018] Furthermore, the defrost parameters also include defrost temperature;

[0019] Adjusted defrost temperature ;

[0020] Where, Tb is the defrost temperature before adjustment, and y is the adjustment coefficient.

[0021] Further, including:

[0022] Other non-defrosted modules spaced apart from the module entering defrost enter defrost earlier than non-defrosted modules adjacent to the module entering defrost.

[0023] Further, it includes: when the module enters defrosting, the defrosting information of the module entering defrosting is sent to the adjacent non-defrosting modules, and the adjacent non-defrosting modules do not enter defrosting within the defrosting time of the module entering defrosting.

[0024] The present invention also provides a defrost control device, comprising:

[0025] Temperature sensing module, which is used to obtain the ambient temperature of all modules;

[0026] A control module is used to control the adjacent modules to stagger and enter defrost, and the non-defrosted modules adjacent to the modules entering defrost perform temperature compensation on themselves according to the ambient temperature, dynamically adjust the defrost parameters, and re-determine the defrost according to the adjusted defrost parameters, thereby extending the defrost time of the adjacent non-defrosted modules.

[0027] Furthermore, the defrost control device further includes:

[0028] a sending module, configured to send defrost information of the module that has entered defrost mode to adjacent modules that have not yet entered defrost mode;

[0029] An acquisition module is used to obtain the placement position of the module;

[0030] A wind direction detection module is used to detect wind direction, and the wind direction detection module and the acquisition module are both connected to the control module.

[0031] The present invention further provides an air-conditioning unit comprising a plurality of modules, wherein the air-conditioning unit comprises the above-mentioned defrost control device.

[0032] Compared with the prior art, the present invention has at least the following beneficial effects:

[0033] The present invention increases the ambient temperature of the surrounding module by entering the defrosting module, thereby causing the adjacent non-defrosting module to perform temperature compensation on itself, dynamically adjust the defrosting parameters, and re-determine the defrosting according to the adjusted defrosting parameters, thereby extending the defrosting time of the adjacent non-defrosting modules, thereby coordinating the multiple modules of the unit with each other, reducing the impact of the ambient temperature on defrosting, avoiding premature defrosting, effectively reducing the number of defrosting times, improving the defrosting energy efficiency, and reducing the operating costs of the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this invention belongs. The terms used in the specification of the application are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the accompanying drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of the present invention and the accompanying drawings are used to distinguish different objects, not to describe a specific order.

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 This is a first defrost flow chart of the defrost control method proposed by the present invention;

[0037] Figure 2 This is a second defrost flow chart of the defrost control method proposed by the present invention;

[0038] Figure 3 This is a schematic diagram of a first arrangement of multiple modules proposed by the present invention;

[0039] Figure 4 This is a schematic diagram of a second arrangement of multiple modules proposed by the present invention;

[0040] Figure 5 This is a module block diagram of the defrost control device proposed in the present invention.

[0041] Reference numerals:

[0042] 10. Temperature sensing module;

[0043] 20. Control module;

[0044] 30. Send module;

[0045] 40. Get the module;

[0046] 50. Wind direction detection module. DETAILED DESCRIPTION

[0047] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain the present invention and are not intended to limit the present invention. Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described features. In addition, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly stated. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0048] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0049] Among them, the current mainstream traditional defrost technology mainly adopts two control methods: time control method (defrost is triggered according to a fixed cycle) or temperature difference control method (based on the temperature difference between the evaporator and the ambient temperature). However, the judgment logic of traditional defrost technology is single: the time control method is prone to unnecessary defrost operations due to changes in environmental conditions, and the temperature difference control method is sensitive to sensor accuracy and is prone to misjudgment. Both will lead to multiple starts of unit defrost, thereby increasing the number of defrost times, reducing defrost energy efficiency, and increasing unit operating costs.

[0050] Therefore, in some embodiments, in order to reduce the number of defrosting times of the unit, improve the defrosting energy efficiency, and reduce the operating cost of the unit, refer to the attached Figure 1 , the present invention proposes a defrost control method, comprising:

[0051] Adjacent modules are misaligned and enter defrosting;

[0052] Obtaining the ambient temperature of the module entering defrosting;

[0053] The adjacent non-defrosting modules perform temperature compensation on themselves according to the ambient temperature, dynamically adjust defrosting parameters, and re-determine defrosting according to the adjusted defrosting parameters, thereby extending the defrosting time of the adjacent non-defrosting modules.

[0054] It should be noted that the conditions for the module to enter defrost mode in this embodiment are: when ambient temperature X ≤ ambient temperature < ambient temperature Y, and the accumulated heating operation time ≥ the preset defrost interval; or when ambient temperature X ≤ ambient temperature < ambient temperature Y, and the defrost temperature difference ≥ ΔT1 (a settable defrost temperature difference) is detected for one consecutive minute, or other defrost conditions are not limited here. Furthermore, the modular defrosting mode proposed in this embodiment includes reverse cooling defrost, hot gas bypass defrost, thermal storage defrost, electrically assisted defrost, and other defrost methods, which are not limited here.

[0055] The distance between adjacent modules is preferably 5 cm to 25 cm. Of course, this distance can be selected to a lower or higher value based on actual conditions and is not limited here. Furthermore, the staggered defrosting of adjacent modules proposed in this embodiment means that if one module enters defrosting, then until the module entering defrosting has not completed defrosting, the remaining modules adjacent to the module entering defrosting will not defrost. Only after the module entering defrosting has completed defrosting can the adjacent modules enter defrosting according to the defrosting conditions, thereby staggering the defrosting times.

[0056] For easier understanding, please refer to the attached Figure 3 In this embodiment, three adjacent modules are used as an example, and the three modules are module A, module B and module C from left to right.

[0057] In this way, when the unit needs to defrost and module B meets the defrost conditions first, module B will enter the defrost state first (equivalent to turning on defrost, the same throughout the text). Since modules A and C are adjacent to module B, modules A and C will not defrost at this time; and since module B is defrosting, the ambient temperature around module B will increase due to the defrosting of module B, resulting in the frosting conditions of adjacent modules A and C being affected, that is, modules A and C will melt part of the frost due to the increase in ambient temperature. Therefore, the adjacent modules A and C will perform temperature compensation on themselves according to the increased ambient temperature and dynamically adjust the defrost parameters so that the adjacent modules A and C will re-determine the defrost according to the adjusted defrost parameters, thereby extending the defrost time of modules A and C and avoiding premature defrosting, thereby effectively reducing the number of defrosts of the unit and improving the defrost energy efficiency.

[0058] If module B has completed defrosting and exited the defrost state, but module A passes the defrost determination first, i.e., module A enters the defrost state, while module C has not yet entered the defrost state, then module A's defrosting will affect the frost condition of the adjacent module B. That is, module B will partially melt due to the increased ambient temperature, causing module B to perform temperature compensation based on the increased ambient temperature and dynamically adjust its defrost parameters so that the adjacent module B will re-determine the defrost according to the adjusted defrost parameters, extending the defrost time for module B. Of course, since module C and module A are not adjacent, if module C passes the defrost determination during module A's defrost process, it can also enter the defrost state, i.e., modules A and C can defrost together. Subsequent judgments are made according to the above steps to coordinate the multiple modules of the unit, resolve the impact of ambient temperature on defrost, avoid premature defrost entry, effectively reduce the number of defrosts, improve defrost energy efficiency, and reduce unit operating costs.

[0059] Therefore, the present invention increases the ambient temperature around the module entering the defrost mode, thereby causing the adjacent non-defrosted modules to perform temperature compensation on themselves, dynamically adjust the defrost parameters, and re-determine the defrost according to the adjusted defrost parameters, thereby extending the defrost time of the adjacent non-defrosted modules, thereby coordinating the multiple modules of the unit with each other, reducing the impact of the ambient temperature on the defrost, avoiding premature defrost, effectively reducing the number of defrost times, improving the defrost energy efficiency, and reducing the operating costs of the unit.

[0060] In other embodiments, if modules A, B, and C meet the defrosting conditions at the same time, module B in the middle should be defrosted first according to the placement position, because when module B is defrosted, the ambient temperature around it will increase, thereby causing modules A and C to melt some frost.

[0061] In a further embodiment, referring to the attached Figure 2 , defrost control methods include:

[0062] Obtain the placement and wind direction of the modules in the unit;

[0063] The adjacent non-defrosted modules located upwind of the module that is undergoing defrosting are made to undergo defrosting earlier than the adjacent non-defrosted modules located downwind of the module that is undergoing defrosting.

[0064] For ease of understanding, this embodiment uses three adjacent modules, A, B, and C, as an example. The modules within the unit should be arranged in a pre-defined arrangement based on the total number of modules, such as in one or more rows. If the units are already positioned on-site, the order in which they enter defrost can be adjusted based on actual site conditions to improve defrost efficiency.

[0065] Specifically, if module B enters the defrost state and it is detected that the wind direction of the unit is from module A to module C, then at this time module C will be affected by the defrost temperature of module B more than module A, that is, module C will defrost more than module A. In this way, modules A and C will compensate themselves for the temperature according to the increased ambient temperature and dynamically adjust the defrost parameters so that the adjacent modules A and C will re-determine the defrost according to the adjusted defrost parameters, resulting in the extended defrost time of module A being shorter than the extended defrost time of module C, that is, under the same conditions, module A will enter the defrost state before module C; on the contrary, if it is detected that the wind direction of the unit is from module C to module A, then under the same conditions, module C will enter the defrost state before module A; of course, if it is detected that the wind direction of the unit is perpendicular to the arrangement direction of modules A, module B and module C, then modules A and module C are affected approximately equally, and at this time they enter the defrost state according to whether the module's own defrost conditions are met.

[0066] Therefore, this embodiment can reasonably adjust the position of the module in the unit, and then utilize the changes in ambient temperature and wind direction of other modules during the defrosting process, perform its own temperature compensation by receiving defrosting information from adjacent modules, dynamically adjust defrosting parameters, and then re-determine defrosting based on the adjusted defrosting parameters, thereby adjusting the defrosting time and sequence of adjacent undefrosted modules to avoid entering defrosting in advance, thereby effectively reducing the number of defrosting times of the unit and improving defrosting energy efficiency.

[0067] Among them, refer to the attached Figure 2 , defrost control methods include:

[0068] Real-time acquisition of the temperature difference ∆T between the ambient temperature T1 of the module after defrosting and the ambient temperature T2 during defrosting;

[0069] The non-defrosted modules adjacent to the module entering defrost perform temperature compensation on themselves according to the temperature difference ∆T and dynamically adjust the defrost parameters.

[0070] It should be noted that ∆T=T1-T2.

[0071] In this way, when a module enters the defrost state, the ambient temperature around the module entering the defrost state will increase, and then the temperature difference ∆T between the defrost module during and after defrosting will be obtained. Then, the adjacent non-defrosted modules will be temperature compensated according to the temperature difference ∆T, and the defrost parameters will be dynamically adjusted. The defrost determination will be re-performed based on the adjusted defrost parameters, extending the defrost time of the adjacent non-defrosted modules. In this way, the multiple modules of the unit can be coordinated with each other, reducing the impact of the ambient temperature on defrosting, avoiding premature defrosting, effectively reducing the number of defrosts, improving defrost energy efficiency, and reducing the operating costs of the unit.

[0072] Specifically, the defrost parameters include the defrost interval time;

[0073] Adjusted defrost interval time ;

[0074] Wherein, tb is the defrost interval time before adjustment, which is equivalent to the initial set defrost interval time or the defrost interval time after the most recent adjustment; x is the adjustment coefficient.

[0075] It should be noted that the value of the adjustment coefficient x can be defined according to the performance of different units and scenarios. Of course, the corresponding defrost-related conditions that are greatly affected by the ambient temperature (including defrost temperature, etc.) can also be adjusted accordingly.

[0076] In this way, when a module enters the defrost state, the ambient temperature around the module entering the defrost state will increase, and then the temperature difference ∆T between the defrost module during and after the defrost is obtained. Then, the adjacent non-defrosted modules will be temperature compensated according to the temperature difference ∆T, and the defrost interval will be dynamically adjusted. The defrost determination will be re-performed based on the adjusted defrost interval, and the defrost entry time of the adjacent non-defrosted modules will be extended. In this way, the multiple modules of the unit can be coordinated with each other, the impact of the ambient temperature on the defrost is reduced, and premature defrost is avoided. The number of defrosts is effectively reduced, the defrost energy efficiency is improved, and the operating cost of the unit is reduced.

[0077] Furthermore, the defrost parameters also include defrost temperature;

[0078] Adjusted defrost temperature ;

[0079] Wherein, Tb is the defrost temperature before adjustment, which is equivalent to the initial set defrost temperature or the defrost temperature after the most recent adjustment; y is the adjustment coefficient.

[0080] It should be noted that the value of the adjustment coefficient x can be defined according to the performance and scenarios of different units, and each module has a set defrost temperature. When the module reaches or exceeds the defrost temperature, it will enter the defrost state.

[0081] In this way, when a module enters the defrost state, the ambient temperature around the module entering the defrost state will increase. Then, the temperature difference ∆T between the defrost module during and after defrosting and the defrost temperature difference ∆T1 of the defrost module are obtained (where Tc is the ambient temperature and Td is the set defrost temperature). As the ambient temperature rises, the value of ∆T1 will also increase, affecting the judgment of normal defrost conditions of the unit. Therefore, the adjacent non-defrosted modules need to perform temperature compensation based on the temperature difference ∆T and dynamically adjust the defrost temperature to reduce the defrost temperature difference ∆T1. Defrost determination is then re-performed based on the adjusted defrost temperature and defrost interval (if the adjusted defrost temperature and defrost interval are simultaneously met, defrost is initiated, the same applies throughout the text). The defrost entry time of adjacent non-defrosted modules is extended, thereby achieving mutual coordination between multiple modules of the unit, reducing the impact of ambient temperature on defrost, avoiding premature defrost entry, effectively reducing the number of defrosts, improving defrost energy efficiency, and reducing unit operating costs.

[0082] Of course, if the undefrosted module adjacent to the last module entering defrost meets the adjusted defrost interval time and defrost temperature requirements at the same time, and the last module entering defrost has finished defrosting, the adjacent undefrosted module will enter defrost.

[0083] In some embodiments, the defrost control method includes:

[0084] Other non-defrosted modules spaced apart from the module entering defrost enter defrost earlier than non-defrosted modules adjacent to the module entering defrost.

[0085] It is understandable that, affected by the module entering defrost, the ambient temperature around the module entering defrost will increase due to the influence of modular frost, causing the adjacent non-defrosted module to melt part of the frost due to the increase in ambient temperature, and then the adjacent non-defrosted module will perform temperature compensation on itself according to the increased ambient temperature, and dynamically adjust the defrost temperature and defrost interval time, so that the adjacent non-defrosted module will re-determine the defrost according to the adjusted defrost temperature and defrost interval time, and extend the defrost time of the adjacent non-defrosted module; at the same time, other non-defrosted modules that are not adjacent to the module entering defrost (equivalent to other non-defrosted modules set at intervals from the module entering defrost) are not affected by or are less affected by the ambient temperature around the module entering defrost. In this way, under the same conditions, the non-defrosted module set at intervals from the module entering defrost enters defrost earlier than the non-defrosted module adjacent to the module entering defrost.

[0086] In some embodiments, in order to effectively reduce the number of defrost times of the unit and improve the defrost energy efficiency, the defrost control method includes: when the module enters defrost, the defrost information of the module entering defrost (including defrost status and defrost progress, etc., the same throughout) will be sent to the adjacent non-defrosted module, and the adjacent non-defrosted module will not enter defrost within the defrost time of the module entering defrost.

[0087] In this way, when a module enters the defrost stage, the adjacent non-defrosted modules will control themselves not to enter the defrost stage after receiving the corresponding defrost information, because the module entering the defrost stage will cause the ambient temperature around it to rise, thereby causing the adjacent non-defrosted modules to shed part of the frost. Then the adjacent non-defrosted modules will perform temperature compensation on themselves according to the increased ambient temperature, dynamically adjust the defrost parameters, and then re-determine the defrost according to the adjusted defrost parameters, so that the defrost time of the adjacent non-defrosted modules will be extended, avoiding premature defrosting, thereby effectively reducing the number of defrost times of the unit and improving the defrost energy efficiency.

[0088] Of course, in other embodiments, such as Figure 4 As shown, there can also be two rows of module groups, each row of module groups consists of four adjacent modules, namely module A, module B, module C, module D, module E, module F, module G and module H;

[0089] In this way, when the unit needs to defrost and module B meets the defrost conditions first, module B will enter the defrost state first, and the other modules will not enter the defrost state. When module B defrosts, the ambient temperature around it will increase, affecting the frost conditions of adjacent modules A, C, and F. That is, modules A, C, and F will partially melt due to the increased ambient temperature. If the wind direction at this time is from module A to module D, module C will melt the most frost. Under the same conditions, the frost melted by modules A and F will be approximately equal. Then, modules A, C, and F will perform temperature compensation based on the increased ambient temperature and dynamically adjust the defrost temperature and defrost interval. Modules A, C, and F will then re-determine the defrost state based on the adjusted defrost temperature and defrost interval, extending the defrost entry time of modules A, C, and F. Under the same conditions, the extended defrost entry time of modules is, from largest to smallest, module C > module A = module F.

[0090] Of course, if two non-adjacent modules (for example, module B and module G) meet the defrosting conditions, modules B and module G can be defrosted at the same time, while the other modules will not enter the defrosting state. When modules B and module G defrost, the ambient temperature around them will increase, which will affect the frost conditions of the adjacent modules A, module C, module F and module H. That is, modules A, module C, module F and module H will partially melt due to the increase in ambient temperature. If the wind direction at this time is from module A to module D, module C will melt the most frost, followed by module F, then module H, and finally module A (the order of modules F and module H can be adjusted according to actual conditions). (The modules A, C, F, and H are replaced) and then module A, module C, module F, and module H perform temperature compensation on themselves according to the increased ambient temperature, dynamically adjust the defrost temperature and defrost interval, and then re-determine the defrost based on the adjusted defrost temperature and defrost interval, extending the defrost entry time of modules A, module C, module F, and module H, and extending the defrost entry time of the corresponding modules. At this time, under the same conditions, the extended defrost entry time of the corresponding modules is module C>module F>module H>module A or module C>module H>module F>module A. Corresponding changes can be made according to the actual heat generation and distance, which are not limited here.

[0091] In some embodiments, as Figure 5 As shown, the present invention also provides a defrost control device, comprising:

[0092] The temperature sensing module 10 is used to obtain the ambient temperature of all modules;

[0093] The control module 20 is used to control the adjacent modules to enter the defrost state in a staggered manner. The non-defrosted modules adjacent to the modules entering the defrost state perform temperature compensation on themselves according to the ambient temperature, dynamically adjust the defrost parameters, and re-determine the defrost state based on the adjusted defrost parameters, thereby extending the defrost time of the adjacent non-defrosted modules.

[0094] It is understandable that the control module 20 can generate a dynamic defrost priority sequence for all modules in real time according to the dynamically adjusted defrost parameters, and then trigger the defrost of the designated modules according to the priority sequence.

[0095] Therefore, this embodiment increases the ambient temperature around the module entering the defrost mode, thereby causing the adjacent non-defrosted modules to perform temperature compensation on themselves, dynamically adjust the defrost parameters, and re-determine the defrost according to the adjusted defrost parameters, thereby extending the defrost time of the adjacent non-defrosted modules. This allows the multiple modules of the unit to coordinate with each other, reduces the impact of the ambient temperature on the defrost, avoids entering the defrost mode prematurely, effectively reduces the number of defrost times, improves the defrost energy efficiency, and reduces the operating costs of the unit.

[0096] Of course, in other embodiments, the present invention also provides a defrost control device, including:

[0097] a memory configured to store instructions;

[0098] The processor is coupled to the memory, and is configured to execute the above-mentioned defrost control method based on instructions stored in the memory.

[0099] In some embodiments, as Figure 5 As shown, the defrost control device also includes:

[0100] a sending module 30 for sending defrost information of the module that has entered defrost mode to adjacent modules that have not yet entered defrost mode;

[0101] An acquisition module 40 is used to obtain the placement position of the module;

[0102] A wind direction detection module 50 is used to detect wind direction. Both the wind direction detection module 50 and the acquisition module 40 are connected to the control module 20 .

[0103] In this way, this embodiment can reasonably adjust the position of the module in the unit, and then utilize the changes in ambient temperature and wind direction of other modules during the defrosting process, perform its own temperature compensation by receiving defrosting information from adjacent modules, dynamically adjust the defrosting temperature and defrosting interval time, and then re-determine the defrosting based on the adjusted defrosting temperature and defrosting interval time, thereby adjusting the defrosting time and sequence of the adjacent undefrosted modules to avoid entering defrosting in advance, thereby effectively reducing the number of defrosting times of the unit and improving the defrosting energy efficiency.

[0104] In some embodiments, the present invention further provides an air-conditioning unit comprising a plurality of modules, wherein the air-conditioning unit comprises the above-mentioned defrost control device.

[0105] In this way, this embodiment can reasonably adjust the position of the module in the air-conditioning unit, and then utilize the change in ambient temperature of other modules during the defrosting process, that is, the influence of wind direction, to perform its own temperature compensation by receiving the defrosting information of the adjacent modules, dynamically adjust the defrosting temperature and defrosting interval time, and then re-determine the defrosting according to the adjusted defrosting temperature and defrosting interval time, so as to adjust the defrosting time and sequence of the adjacent non-defrosted modules to avoid entering defrosting in advance, thereby effectively reducing the number of defrosting times of the unit and improving the defrosting energy efficiency.

[0106] It is understandable that if the multiple modules of the air-conditioning unit do not define the discharge positions, this defrost control method can also be used to delay the defrost time by taking advantage of the heat generated by the frost in adjacent modules and the influence of wind direction.

[0107] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned specific embodiments, or to make equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the present invention specification and drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A defrost control method, characterized in that: include: Adjacent modules are misaligned and enter defrosting; Obtaining the ambient temperature of the module entering defrosting; The adjacent non-defrosting modules perform temperature compensation on themselves according to the ambient temperature, dynamically adjust defrosting parameters, and re-determine defrosting according to the adjusted defrosting parameters, thereby extending the defrosting time of the adjacent non-defrosting modules.

2. The defrost control method according to claim 1, characterized in that: include: Obtain the placement and wind direction of the modules in the unit; The adjacent non-defrosted modules located upwind of the module that is undergoing defrosting are defrosted earlier than the adjacent non-defrosted modules located downwind of the module that is undergoing defrosting.

3. The defrost control method according to claim 1 or 2, characterized in that: include: Obtaining a temperature difference ∆T between an ambient temperature T1 of the module after defrosting and an ambient temperature T2 during defrosting; The non-defrosted modules adjacent to the module entering defrost perform temperature compensation on themselves according to the temperature difference ∆T and dynamically adjust the defrost parameters.

4. The defrost control method according to claim 3, characterized in that: The defrost parameters include the defrost interval time; Adjusted defrost interval time ; Among them, tb is the defrost interval time before adjustment, and x is the adjustment coefficient.

5. The defrost control method according to claim 4, characterized in that: The defrost parameters also include defrost temperature; Adjusted defrost temperature ; Where, Tb is the defrost temperature before adjustment, and y is the adjustment coefficient.

6. The defrost control method according to claim 1, characterized in that: include: Other non-defrosted modules spaced apart from the module entering defrost enter defrost earlier than non-defrosted modules adjacent to the module entering defrost.

7. The defrost control method according to claim 1, characterized in that: include: When the module enters defrosting, the defrosting information of the module entering defrosting will be sent to the adjacent non-defrosting modules, and the adjacent non-defrosting modules will not enter defrosting within the defrosting time of the module entering defrosting.

8. A defrost control device, characterized in that: include: Temperature sensing module, which is used to obtain the ambient temperature of all modules; A control module is used to control the adjacent modules to stagger and enter defrost, and the non-defrosted modules adjacent to the modules entering defrost perform temperature compensation on themselves according to the ambient temperature, dynamically adjust the defrost parameters, and re-determine the defrost according to the adjusted defrost parameters, thereby extending the defrost time of the adjacent non-defrosted modules.

9. The defrost control device according to claim 8, characterized in that: The defrost control device also includes: a sending module, configured to send defrost information of the module that has entered defrost mode to adjacent modules that have not yet entered defrost mode; An acquisition module is used to obtain the placement position of the module; A wind direction detection module is used to detect wind direction, and the wind direction detection module and the acquisition module are both connected to the control module.

10. An air conditioning unit comprising a plurality of modules, characterized in that: The air-conditioning unit includes the defrost control device according to claim 8 or 9.

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