Compressor control method and device and refrigerating unit

Abstract

The invention discloses a control method and device of a compressor and a refrigerating unit. The control method comprises the steps that whether the refrigerating unit meets the starting condition or not is judged, the refrigerating unit comprises multiple refrigerating systems, the starting condition comprises that at least one of the multiple refrigerating systems meets the refrigerating condition, and each refrigerating system comprises a compressor; and under the condition that the starting condition is met, one or more of a plurality of compressors of the multi-path refrigerating system is / are controlled to be started. Therefore, the redundancy of the refrigerating unit is improved.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and more specifically, to a control method and control device for a compressor and a refrigeration unit. Background Art

[0002] For a single compressor, when the compressor fails, the refrigeration unit will be completely paralyzed with no redundancy.

[0003] Therefore, how to improve the redundancy of refrigeration units has become a technical problem that needs to be solved in this field. Summary of the invention

[0004] In view of this, the present application proposes a control method and a control device for a compressor and a refrigeration unit to improve the redundancy of the refrigeration unit.

[0005] In a first aspect, an embodiment of the present application provides a method for controlling a compressor, the method comprising: determining whether a refrigeration unit meets a start-up condition, wherein the refrigeration unit comprises a multi-way refrigeration system, the start-up condition comprising at least one of the multi-way refrigeration systems meeting a refrigeration condition, and each refrigeration system comprises a compressor; and when the start-up condition is met, controlling one or more of the multiple compressors of the multi-way refrigeration system to start.

[0006] Optionally, the controlling of starting one or more of the multiple compressors of the multi-way refrigeration system includes: when one of the multi-way refrigeration systems meets the refrigeration condition, controlling the compressor included in the one to start; and / or, when multiple of the multi-way refrigeration systems meet the refrigeration condition, controlling one or more of the multiple compressors included in the multiple to start based on the heating value of the components to be refrigerated and / or the current operating status of the refrigeration unit.

[0007] Optionally, based on the heating value of the component to be refrigerated and / or the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start, including: when the heating value is less than a first preset heating value, one of the multiple compressors included in the multiple units is controlled to start; and / or when the heating value is greater than or equal to a second preset heating value, based on the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start, wherein the first preset heating value is less than the second preset heating value; and / or, when the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start.

[0008] Optionally, when the heating value is less than a first preset heating value, one of the multiple compressors included in the multiple ones is controlled to start, including: when the current operating state of the refrigeration unit is not a multi-system operating state, based on the respective working hours of multiple of the multiple compressors included in the multiple ones, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current operating state of the refrigeration unit is a multi-system operating state, based on the current compressor working mode, one of the multiple compressors included in the multiple ones is controlled to start or maintain the currently running compressor to continue running.

[0009] Optionally, when the heating value is greater than or equal to the second preset heating value, based on the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, including: when the current operating state of the refrigeration unit is not a multi-system operating state, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current operating state of the refrigeration unit is a multi-system operating state, multiple of the multiple compressors included in the multiple ones are controlled to start; preferably, when the current operating state of the refrigeration unit is not a multi-system operating state, one of the multiple compressors included in the multiple ones is controlled to start, including: determining which compressor to start based on the respective working hours of multiple of the multiple compressors included in the multiple ones; preferably, when the current operating state of the refrigeration unit is a multi-system operating state, multiple of the multiple compressors included in the multiple ones are controlled to start, including: when the speed of the currently started compressor reaches its maximum speed, starting the next compressor.

[0010] Optionally, when the calorific value is greater than or equal to the first calorific value and less than the second calorific value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, including: when the current compressor working mode is a single mode and the current operating state of the refrigeration unit is not a multi-system operating state, based on the respective working hours of the multiple compressors included in the multiple ones, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current compressor working mode is a single mode and the current operating state of the refrigeration unit is not a multi-system operating state, When the state is a multi-system operation state, the currently running compressor is maintained to continue operating or one of the multiple compressors included in the multiple compressors is controlled to start based on the respective working hours of the multiple compressors included in the multiple compressors; and / or, when the current compressor working mode is a multi-mode and the current operating state of the refrigeration unit is not a multi-system operation state, one of the multiple compressors included in the multiple compressors is controlled to start; and / or, when the current compressor working mode is a multi-mode and the current operating state of the refrigeration unit is a multi-system operation state, multiple compressors included in the multiple compressors are controlled to start.

[0011] In a second aspect, an embodiment of the present application also provides a control device for a compressor, which includes: a start-up condition judgment module, used to judge whether the refrigeration unit meets the start-up condition, wherein the refrigeration unit includes a multi-way refrigeration system, and the start-up condition includes that at least one of the multi-way refrigeration systems meets the refrigeration condition, and each refrigeration system includes a compressor; and a compressor start-up module, used to control one or more of the multiple compressors of the multi-way refrigeration system to start when the start-up condition is met.

[0012] Optionally, the compressor start-up module controls the start-up of one or more of the multiple compressors of the multi-way refrigeration system, including: when one of the multi-way refrigeration systems meets the refrigeration condition, controlling the start-up of the compressor included in the one; and / or, when multiple of the multi-way refrigeration systems meet the refrigeration condition, controlling the start-up of one or more of the multiple compressors included in the multiple refrigeration systems based on the heating value of the components to be refrigerated and / or the current operating status of the refrigeration unit.

[0013] Optionally, based on the heating value of the component to be refrigerated and / or the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start, including: when the heating value is less than a first preset heating value, one of the multiple compressors included in the multiple units is controlled to start; and / or, when the heating value is greater than or equal to a second preset heating value, based on the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start, wherein the first preset heating value is less than the second preset heating value; and / or, when the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start.

[0014] Optionally, when the heating value is less than a first preset heating value, one of the multiple compressors included in the multiple ones is controlled to start, including: when the current operating state of the refrigeration unit is not a multi-system operating state, based on the respective working hours of multiple of the multiple compressors included in the multiple ones, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current operating state of the refrigeration unit is a multi-system operating state, based on the current compressor working mode, one of the multiple compressors included in the multiple ones is controlled to start or maintain the currently running compressor to continue running.

[0015] Optionally, when the heating value is greater than or equal to the second preset heating value, based on the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, including: when the current operating state of the refrigeration unit is not a multi-system operating state, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current operating state of the refrigeration unit is a multi-system operating state, multiple of the multiple compressors included in the multiple ones are controlled to start; preferably, when the current operating state of the refrigeration unit is not a multi-system operating state, one of the multiple compressors included in the multiple ones is controlled to start, including: determining which compressor to start based on the respective working hours of multiple of the multiple compressors included in the multiple ones; preferably, when the current operating state of the refrigeration unit is a multi-system operating state, multiple of the multiple compressors included in the multiple ones are controlled to start, including: when the speed of the currently started compressor reaches its maximum speed, starting the next compressor.

[0016] Optionally, when the calorific value is greater than or equal to the first calorific value and less than the second calorific value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, including: when the current compressor working mode is a single mode and the current operating state of the refrigeration unit is not a multi-system operating state, based on the respective working hours of the multiple compressors included in the multiple ones, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current compressor working mode is a single mode and the current operating state of the refrigeration unit is not a multi-system operating state, When the state is a multi-system operation state, the currently running compressor is maintained to continue operating or one of the multiple compressors included in the multiple compressors is controlled to start based on the respective working hours of the multiple compressors included in the multiple compressors; and / or, when the current compressor working mode is a multi-mode and the current operating state of the refrigeration unit is not a multi-system operation state, one of the multiple compressors included in the multiple compressors is controlled to start; and / or, when the current compressor working mode is a multi-mode and the current operating state of the refrigeration unit is a multi-system operation state, multiple compressors included in the multiple compressors are controlled to start.

[0017] In a third aspect, an embodiment of the present application further provides a refrigeration unit, which includes a multi-way refrigeration system, each of which includes a compressor, and multiple compressors of the multi-way refrigeration system are controlled based on the above-mentioned control method.

[0018] According to the technical solution of the present application, it is determined whether the starting conditions are met, and the starting conditions are that at least one of the multi-way refrigeration systems meets the refrigeration conditions. When the starting conditions are met, one or more of the multiple compressors of the multi-way refrigeration system are controlled to start. In this way, a multi-way refrigeration system is set up, and multiple compressors are controlled according to the situation when refrigeration is performed. Even if a single compressor fails, it will not cause the entire refrigeration unit to be completely paralyzed, thereby improving the redundancy of the refrigeration unit.

[0019] Other features and advantages of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of the present application are used to provide a further understanding of the present application, and the schematic implementation modes and descriptions of the present application are used to explain the present application. In the accompanying drawings:

[0021] Figure 1 is a flow chart of a method for controlling a compressor according to a preferred embodiment of the present application;

[0022] Figure 2 A logic diagram of a compressor control method according to a preferred embodiment of the present application;

[0023] Figure 3 is a schematic diagram of a refrigeration unit according to a preferred embodiment of the present application; and

[0024] Figure 4 It is a structural block diagram of a compressor control device according to a preferred embodiment of the present application. DETAILED DESCRIPTION

[0025] The technical solution of the present application will be described in detail below with reference to the accompanying drawings and in combination with the implementation modes.

[0026] In a first aspect, an embodiment of the present application provides a method for controlling a compressor.

[0027] Figure 1 FIG. 1 is a flow chart of a method for controlling a compressor according to a preferred embodiment of the present application. Figure 1 As shown, the control method includes the following contents.

[0028] In step S10, it is determined whether the refrigeration unit meets the start-up conditions, wherein the start-up conditions include that at least one of the multi-way refrigeration systems meets the refrigeration conditions, and each refrigeration system includes a compressor. If the start-up conditions are met, step S11 is executed; if not, step S12 is executed.

[0029] Optionally, in the implementation manner of the present application, for any refrigeration system, it is possible to determine whether the refrigeration system meets the refrigeration conditions by determining whether all components included in the refrigeration system are fault-free. For example, the refrigeration system includes a fan, a sensor, a compressor, an electronic expansion valve, a water pump, etc., and it is possible to determine whether the refrigeration system meets the refrigeration conditions by determining whether all of these are fault-free.

[0030] Optionally, in the embodiment of the present application, when the startup condition is not met, step S10 may be executed to continue to determine whether the refrigeration unit meets the startup condition.

[0031] In step S11 , one or more compressors of the multi-path refrigeration system are controlled to start.

[0032] In step S12, the current operating state of the refrigeration unit is set to a shutdown state.

[0033] Optionally, in the embodiment of the present application, controlling the start-up of one or more compressors of the multi-path refrigeration system may include the following contents.

[0034] When one of the multi-way refrigeration systems meets the refrigeration condition, the compressor included in the one is controlled to start. In other words, when one of the multi-way refrigeration systems meets the refrigeration condition, the compressor included in the one of the multi-way refrigeration systems that meets the refrigeration condition is controlled to start.

[0035] And / or, when multiple refrigeration systems in a multi-way refrigeration system meet the refrigeration conditions, based on the heat generation of the components to be refrigerated and / or the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple refrigeration systems are controlled to start. It should be noted that the multiple refrigeration systems described here refer to multiple refrigeration systems in a multi-way refrigeration system that meet the refrigeration conditions. For example, there are 5-way refrigeration systems, of which 3-way refrigeration systems meet the start-up conditions, and the multiple refrigeration systems refer to the 3-way refrigeration systems that meet the refrigeration conditions.

[0036] Optionally, in an embodiment of the present application, based on the heating value of the component to be refrigerated and / or the current operating state of the refrigeration unit, controlling one or more of the multiple compressors included in the multiple to start may include the following contents.

[0037] When the heat output is less than the first preset heat output, one of the multiple compressors included in the multiple compressors is controlled to start. For example, it can be determined according to the working time of the compressor which one of the multiple compressors included in the multiple compressors is started. Specifically, it can be controlled to start the compressor with the shortest working time among the multiple compressors included in the multiple compressors.

[0038] And / or, when the heating value is greater than or equal to the second preset heating value, based on the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, wherein the first preset heating value is less than the second preset heating value. In addition, when the heating value is greater than or equal to the second preset heating value, the current compressor operation mode can also be set to a multiple mode.

[0039] Optionally, when the current operating state of the refrigeration unit is not a multi-system operating state, one of the plurality of compressors included in the plurality is controlled.

[0040] Optionally, when the current operating state of the refrigeration unit is a multi-system operating state, multiple compressors included in the multiple ones are controlled to start. Specifically, multiple compressors can be selected from the multiple compressors included in the multiple ones, and the specific selection strategy can be determined according to the specific situation. For example, the selection can be made based on the working time of the compressor. Specifically, multiple compressors with shorter working time among the multiple compressors included in the multiple ones are selected to start. In addition, the number of compressors controlled to start can be determined according to the specific situation.

[0041] And / or, when the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start.

[0042] Optionally, in an embodiment of the present application, when the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor operating mode and the current operating status of the refrigeration unit, controlling one or more of the multiple compressors included in the multiple compressors to start may include the following contents.

[0043] When the current compressor operation mode is a single mode and the current operation state of the refrigeration unit is not a multi-system operation state, one of the multiple compressors included in the multiple compressors is controlled to start based on the respective operation time of the multiple compressors included in the multiple compressors. Specifically, it can be determined which one is controlled to start according to the operation time. For example, the compressor with the shortest operation time is controlled to start.

[0044] And / or, when the current compressor operating mode is a single mode and the current operating state of the refrigeration unit is a multi-system operating state, the currently running compressor is maintained to continue operating or one of the multiple compressors included in the multiple compressors is controlled to start based on the respective working hours of the multiple compressors included in the multiple compressors.

[0045] And / or, when the current compressor operation mode is a multi-mode and the current operation state of the refrigeration unit is not a multi-system operation state, one of the multiple compressors included in the multiple modes is controlled to start. Specifically, it can be determined which one is controlled to start according to the operation time. For example, the compressor with the shortest operation time is controlled to start.

[0046] And / or, when the current compressor operating mode is a multi-mode and the current operating state of the refrigeration unit is a multi-system operating state, control multiple of the multiple compressors included in the multiple to start. Among them, multi-mode means setting two or more compressors to work. For example, multi-mode can be a dual mode, a triple mode, a quad mode, and so on. In addition, in an embodiment of the present application, the current compressor operating mode is the operating mode of the set compressor, and has nothing to do with how many compressors are currently running. In addition, in an embodiment of the present application, when judging which mode the current compressor operating mode is, it can be possible to set parameters that can characterize the current compressor operating mode and make a judgment based on the set parameters.

[0047] In the embodiment of the present application, the number of compressors controlled to be started is determined based on the number of compressors represented in the multi-mode. In the case where the number of compressors included in the multi-mode is greater than the number of compressors that need to be started, it can be determined which compressors are controlled to be started according to the specific situation. For example, it can be determined according to the working time that which compressors are controlled to be started. Specifically, the compressors with shorter working time are started.

[0048] Optionally, in an embodiment of the present application, when the heating value is less than a first preset heating value, controlling one of the plurality of compressors included in the plurality to start may include the following contents.

[0049] When the current operation state of the refrigeration unit is not a multi-system operation state, one of the multiple compressors included in the multiple compressors is controlled to start based on the respective working hours of the multiple compressors included in the multiple compressors. For example, the compressor with the shortest working time is controlled to start.

[0050] And / or, when the current operating state of the refrigeration unit is a multi-system operating state, based on the current compressor operating mode, one of the multiple compressors included in the multiple ones is controlled to start or the currently running compressor is maintained to continue to operate. Specifically, when the current compressor operating mode is a single mode, the currently running compressor is maintained to continue to operate. When the current compressor operating mode is a multi-mode, one of the multiple compressors included in the multiple ones is controlled to start.

[0051] Optionally, in an embodiment of the present application, when the heating value is greater than or equal to a second preset heating value, based on the current operating state of the refrigeration unit, controlling one or more of the multiple compressors included in the multiple to start may include the following contents.

[0052] When the current operation state of the refrigeration unit is not a multi-system operation state, one of the plurality of compressors included in the plurality of compressors is controlled to start.

[0053] And / or, when the current operating state of the refrigeration unit is a multi-system operating state, control multiple of the multiple compressors included in the multiple compressors to start. The multi-system operating state means that two or more refrigeration systems are set to work. For example, the multi-system operating state may be a dual-system operating state, a triple-system operating state, a quad-system operating state, and the like. In addition, in the embodiment of the present application, the current operating state of the refrigeration unit is the operating state of the set refrigeration unit, and has nothing to do with which refrigeration systems are currently running. In addition, in the embodiment of the present application, when judging what state the current operating state of the refrigeration unit is, it may be possible to set parameters that can characterize the current operating state, and make a judgment based on the set parameters.

[0054] Optionally, in the embodiment of the present application, when the current operating state of the refrigeration unit is not a multi-system operating state, controlling one of the multiple compressors included in the multiple to start may include: determining which compressor to start based on the respective working hours of the multiple compressors included in the multiple. For example, controlling the compressor with the shortest working time to start.

[0055] Optionally, in an embodiment of the present application, when the current operating state of the refrigeration unit is a multi-system operating state, controlling the startup of multiple compressors included in the multiple compressors may include: when the speed of the currently started compressor reaches its maximum speed, starting the next compressor. In addition, in an embodiment of the present application, when the current operating state of the refrigeration unit is a multi-system operating state, controlling the startup of multiple compressors included in the multiple compressors may also include starting multiple compressors included in the multiple compressors in sequence. For example, the startup sequence may be determined based on the working time of the compressor. The startup sequence is determined based on the working time of each of the multiple compressors included in the multiple compressors. Specifically, the multiple compressors included in the multiple compressors are sorted from short to long according to the working time, and are started according to the sorted order.

[0056] In the implementation manner of the present application, the startup of the compressor is controlled according to the working hours of the compressor, so that the running time of the compressor can be balanced and controlled, and the problem of inconsistent life caused by inconsistent working hours of the compressor can be solved, which is beneficial to subsequent maintenance work.

[0057] Optionally, in the embodiment of the present application, the first preset heating value and the second preset heating value can be determined according to the specific situation, as long as they can meet the technical concept of the technical solution provided in the embodiment of the present application. For example, the first preset heating value can be 18KW; the second preset heating value can be 19.5KW.

[0058] Figure 2 It is a logic diagram of a compressor control method according to a preferred embodiment of the present application. Figure 3 FIG. 1 is a schematic diagram of a refrigeration unit according to a preferred embodiment of the present application. Figure 3 As shown, in the embodiment of the present application, the refrigeration unit includes two refrigeration systems, which are respectively recorded as the first refrigeration system and the second refrigeration system; each refrigeration system includes a compressor, the first refrigeration system includes the first compressor, and the second refrigeration system includes the second compressor; each refrigeration system forms a refrigeration cycle, and the component to be refrigerated is the battery pack. Each refrigeration system couples its refrigerant pipeline with the coolant pipeline of the battery pack through a cooler to achieve heat exchange for the battery pack. In this embodiment, the multi-mode is a dual-mode, and the multi-system operation state is a dual-system operation state.

[0059] Combine the following Figure 2 The control method of the compressor provided in the embodiment of the present application is exemplarily introduced.

[0060] In step S20, it is determined whether the refrigeration unit meets the start-up conditions. If yes, step S21 is executed; if no, step S22 is executed. Figure 3In this embodiment, the start-up condition includes that the first refrigeration system and / or the second refrigeration system meet the refrigeration condition. As long as one of the two refrigeration systems meets the refrigeration condition, it can be considered that the refrigeration unit meets the start-up condition; if neither of the two refrigeration systems meets the refrigeration condition, the refrigeration unit does not meet the start-up condition.

[0061] In step S21, it is determined whether the first refrigeration system does not meet the refrigeration condition or the second refrigeration system does not meet the refrigeration condition. If yes, step S24 is executed; if no, step S26 is executed.

[0062] In step S22, the control stops the first compressor and the second compressor.

[0063] In step S23, the current operating state of the refrigeration unit is set to the shutdown state. When the refrigeration unit does not meet the startup conditions, the compressors in the two-way refrigeration system are stopped, and the current operating state of the refrigeration unit is set to the shutdown state.

[0064] In step S24, if the first refrigeration system does not meet the refrigeration conditions, the second compressor included in the second refrigeration system is turned on, and the working time of the second compressor is started, and T2 starts counting. If the second refrigeration system does not meet the refrigeration conditions, the first compressor included in the first refrigeration system is turned on, and the working time of the first compressor is started, and T1 starts counting. If only one of the refrigeration systems can be allowed to operate normally, the corresponding compressor starts working, and the corresponding compressor working time timer starts counting. At this time, the refrigeration unit is in a single system operation state.

[0065] In step S25, the current operating state of the refrigeration unit is set to a single system operating state.

[0066] In step S26, it is determined whether the heat generated by the battery pack is less than 18KW. If so, step S27 is executed; if not, step S33 is executed.

[0067] In step S27, it is determined whether the current operating state of the refrigeration unit is not a dual-system operating state. If so, step S28 is executed; if not, step S30 is executed.

[0068] In step S28, if the working time of the first compressor is greater than the working time of the second compressor, the second compressor is turned on; if the working time of the second compressor is greater than the working time of the first compressor, the first compressor is turned on.

[0069] In step S29, the current operating state of the refrigeration unit is set to the dual-system operating state. By setting the current operating state of the refrigeration system to the dual-system operating state, frequent start and stop of the compressor can be avoided.

[0070] In step S30, it is determined whether the current compressor operation mode is the dual mode. If so, step S31 is executed; if not, step S40 is executed. By determining whether the current compressor operation mode is the dual mode, frequent start and stop of the compressor can be avoided.

[0071] In step S31, the current compressor operation mode is set to single mode.

[0072] In step S32, if the working time of the first compressor is greater than the working time of the second compressor, the second compressor is turned on; if the working time of the second compressor is greater than the working time of the first compressor, the first compressor is turned on.

[0073] In step S33, it is determined whether the heat generated by the battery pack is greater than or equal to 19.5 KW. If not, step S34 is executed; if yes, step S35 is executed.

[0074] In step S34, it is determined whether the current compressor operation mode is the dual mode. If so, step S36 is executed; if not, step S27 is executed.

[0075] In step S35, the current compressor operation mode is set to dual mode.

[0076] In step S36, it is determined whether the current operating state of the refrigeration unit is not a dual-system operating state. If so, step S37 is executed; if not, step S39 is executed.

[0077] In step S37, it is determined which compressor to start based on the working time of the compressors. Specifically, if the working time of the first compressor is greater than that of the second compressor, the second compressor is started; if the working time of the second compressor is greater than that of the first compressor, the first compressor is started. It should be noted that, if the judgment in step S36 is yes, only one compressor needs to be started, and which compressor to start is determined based on the working time.

[0078] In step S38, the current operating state of the refrigeration unit is set to the dual-system operating state. By setting the current operating state of the refrigeration unit to the dual-system operating state, frequent starting and stopping of the compressor can be avoided.

[0079] In step S39, when the speed of the compressor that is turned on first reaches its maximum speed, the other compressor is turned on. It should be noted that if the judgment in step S36 is no, both compressors need to be turned on. The order of turning on the compressors can be determined according to the working time.

[0080] In step S40 , the current compressor operation is maintained.

[0081] In the implementation mode of the present application, if both refrigeration systems can operate normally (that is, both refrigeration systems meet the refrigeration conditions), it is determined whether to operate one compressor or two compressors according to the heat generation of the battery pack. Specifically, when the heat generation of the battery pack is less than 18KW, the current compressor working mode is set to single mode; when the heat generation of the battery pack is greater than or equal to 19.5KW, the current compressor working mode is set to dual mode; when the heat generation of the battery pack is greater than or equal to 18KW and less than 19.5KW, according to the current compressor working mode, control to start one compressor or two compressors. The hysteresis loop method is used here to prevent the compressor from starting and stopping frequently.

[0082] When the heat generated by the battery pack is less than 18KW, if the operating state of the refrigeration unit is a shutdown state or a single-system operating state, then it is determined which compressor to turn on according to the working time of the compressor, and the current operating state of the refrigeration unit is switched to a dual-system operating state; if the operating state of the refrigeration unit is a dual-system operating state, then it is determined whether the current compressor working mode is a dual mode. If so, it is switched to a single mode, and it is determined which compressor to turn on according to the working time.

[0083] When the heat generated by the battery pack is greater than or equal to 19.5KW, control to turn on one compressor or two compressors. When the current operating state of the refrigeration unit is not a dual-system operating state, control to turn on one compressor. When the current operating state of the refrigeration unit is a dual-system operating state, one compressor cannot meet the cooling needs of the battery pack, and two compressors need to be turned on. Specifically, first determine which compressor to turn on first based on the working time, and when the speed of the compressor that has been turned on reaches its maximum speed, turn on the other compressor.

[0084] In the implementation of the present application, a two-way refrigeration system is set up, and the problem of the entire refrigeration unit not working when a single compressor fails is solved by balanced control of the dual compressors. In addition, in the process of balanced control of the dual compressors, the compressor work is reasonably distributed according to the historical working hours and the heat generation of the battery pack, which solves the problem of inconsistent life caused by inconsistent working hours of the dual compressors, thereby achieving the purpose of increasing reliability and extending service life. The technical solution provided by the implementation method of the present application can increase redundancy, extend service life, and improve system reliability.

[0085] In a second aspect, an embodiment of the present application provides a control device for a compressor.

[0086] Figure 4 FIG. 1 is a structural block diagram of a compressor control device according to a preferred embodiment of the present application. Figure 4As shown, the control device includes a start-up condition judgment module 1 and a compressor start-up module 2. The start-up condition judgment module 1 is used to judge whether the refrigeration unit meets the start-up condition, wherein the refrigeration unit includes a multi-way refrigeration system, and the start-up condition includes that at least one of the multi-way refrigeration systems meets the refrigeration condition, and each refrigeration system includes a compressor. The compressor start-up module 2 is used to control one or more of the multiple compressors of the multi-way refrigeration system to start when the start-up condition is met.

[0087] Optionally, in an embodiment of the present application, the compressor start-up module controls the start-up of one or more of the multiple compressors of the multi-way refrigeration system, including: when one of the multi-way refrigeration systems meets the refrigeration conditions, controlling the start-up of the compressor included in the one; and / or when multiple of the multi-way refrigeration systems meet the refrigeration conditions, based on the heating value of the components to be refrigerated and / or the current operating status of the refrigeration unit, controlling the start-up of one or more of the multiple compressors included in the multiple refrigeration systems.

[0088] Optionally, in an embodiment of the present application, based on the heating value of the component to be refrigerated and / or the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start, including: when the heating value is less than a first preset heating value, one of the multiple compressors included in the multiple units is controlled to start; and / or, when the heating value is greater than or equal to a second preset heating value, based on the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start, wherein the first preset heating value is less than the second preset heating value; and / or, when the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple units are controlled to start.

[0089] Optionally, in an embodiment of the present application, when the heating value is less than a first preset heating value, one of the multiple compressors included in the multiple ones is controlled to start, including: when the current operating state of the refrigeration unit is not a multi-system operating state, based on the respective working hours of multiple of the multiple compressors included in the multiple ones, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current operating state of the refrigeration unit is a multi-system operating state, based on the current compressor working mode, one of the multiple compressors included in the multiple ones is controlled to start or maintain the currently running compressor to continue running.

[0090] Optionally, in an embodiment of the present application, when the heating value is greater than or equal to the second preset heating value, based on the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, including: when the current operating state of the refrigeration unit is not a multi-system operating state, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current operating state of the refrigeration unit is a multi-system operating state, multiple of the multiple compressors included in the multiple ones are controlled to start; preferably, when the current operating state of the refrigeration unit is not a multi-system operating state, one of the multiple compressors included in the multiple ones is controlled to start, including: determining which compressor to start based on the respective working hours of the multiple compressors included in the multiple ones; preferably, when the current operating state of the refrigeration unit is a multi-system operating state, multiple of the multiple compressors included in the multiple ones are controlled to start, including: when the speed of the currently started compressor reaches its maximum speed, starting the next compressor.

[0091] Optionally, in an embodiment of the present application, when the heat value is greater than or equal to the first heat value and less than the second heat value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, including: when the current compressor working mode is a single mode and the current operating state of the refrigeration unit is not a multi-system operating state, based on the respective working hours of multiple of the multiple compressors included in the multiple ones, one of the multiple compressors included in the multiple ones is controlled to start; and / or, when the current compressor working mode is a single mode and the current operating state of the refrigeration unit is not a multi-system operating state, When the operating state is a multi-system operating state, the currently running compressor is maintained to continue operating or one of the multiple compressors included in the multiple compressors is controlled to start based on the respective working hours of the multiple compressors included in the multiple compressors; and / or, when the current compressor operating mode is a multi-mode and the current operating state of the refrigeration unit is not a multi-system operating state, one of the multiple compressors included in the multiple compressors is controlled to start; and / or, when the current compressor operating mode is a multi-mode and the current operating state of the refrigeration unit is a multi-system operating state, multiple compressors included in the multiple compressors are controlled to start.

[0092] The specific working principle and benefits of the compressor control device provided in the embodiment of the present application are similar to the specific working principle and benefits of the compressor control method provided in the embodiment of the present application, and will not be repeated here.

[0093] In a third aspect, an embodiment of the present application provides a refrigeration unit, which includes a multi-way refrigeration system, each of which includes a compressor, and multiple compressors of the multi-way refrigeration system are controlled based on the control method described in the above embodiment.

[0094] The preferred embodiments of the present application are described in detail above; however, the present application is not limited to the specific details in the above embodiments. Within the technical concept of the present application, a variety of simple modifications can be made to the technical solution of the present application, and these simple modifications all fall within the protection scope of the present application.

[0095] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not further describe various possible combinations.

[0096] In addition, the various implementation modes of the present application may be arbitrarily combined, and as long as they do not violate the concept of the present application, they should also be regarded as the contents disclosed in the present application.

Claims

1. A method for controlling a compressor, characterized in that: The control method includes: Determining whether the refrigeration unit meets a start-up condition, wherein the refrigeration unit includes a multi-way refrigeration system, the start-up condition includes that at least one of the multi-way refrigeration systems meets a refrigeration condition, and each refrigeration system includes a compressor; and When the start-up condition is met, one or more compressors of the multi-path refrigeration system are controlled to start.

2. The control method according to claim 1, characterized in that: The controlling one or more of the compressors of the multi-circuit refrigeration system to start up comprises: When one of the multi-circuit refrigeration systems meets the refrigeration condition, controlling the compressor included in the one to start; and / or When multiple units in the multi-channel refrigeration system meet the refrigeration conditions, one or more of the multiple compressors included in the multiple units are controlled to start based on the heating value of the components to be refrigerated and / or the current operating status of the refrigeration unit.

3. The control method according to claim 2, characterized in that: Based on the heat generation of the component to be refrigerated and / or the current operating state of the refrigeration unit, one or more of the plurality of compressors included in the plurality of components are controlled to start, including: When the heating value is less than a first preset heating value, controlling one of the plurality of compressors included in the plurality to start; and / or In the case where the heating value is greater than or equal to a second preset heating value, based on the current operating state of the refrigeration unit, controlling one or more of the plurality of compressors included in the plurality to start, wherein the first preset heating value is less than the second preset heating value; and / or When the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start.

4. The control method according to claim 3, characterized in that: When the heating value is less than the first preset heating value, controlling one of the plurality of compressors included in the plurality to start, comprising: When the current operating state of the refrigeration unit is not a multi-system operating state, based on the respective working hours of multiple compressors included in the multiple compressors, controlling one of the multiple compressors included in the multiple compressors to start; and / or When the current operating state of the refrigeration unit is a multi-system operating state, based on the current compressor working mode, one of the multiple compressors included in the multiple systems is controlled to start or maintain the currently running compressor to continue running.

5. The control method according to claim 3, characterized in that: When the heating value is greater than or equal to a second preset heating value, based on the current operating state of the refrigeration unit, controlling one or more of the plurality of compressors included in the plurality to start, comprises: When the current operating state of the refrigeration unit is not a multi-system operating state, controlling one of the plurality of compressors included in the plurality of compressors to start; and / or When the current operation state of the refrigeration unit is a multi-system operation state, controlling multiple compressors included in the multiple compressors to start; Preferably, when the current operation state of the refrigeration unit is not a multi-system operation state, controlling one of the multiple compressors included in the multiple to start up comprises: determining which compressor to start up based on the respective working hours of the multiple compressors included in the multiple; Preferably, when the current operating state of the refrigeration unit is a multi-system operating state, controlling multiple compressors included in the multiple systems to start includes: when the speed of the currently started compressor reaches its maximum speed, starting the next compressor.

6. The control method according to claim 3, characterized in that: When the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, including: When the current compressor operation mode is a single mode and the current operation state of the refrigeration unit is not a multi-system operation state, based on the respective operation durations of the multiple compressors included in the multiple compressors, controlling one of the multiple compressors included in the multiple compressors to start; and / or When the current compressor operation mode is a single mode and the current operation state of the refrigeration unit is a multi-system operation state, maintaining the currently running compressor to continue to operate or controlling one of the multiple compressors included in the multiple compressors to start based on the respective operation durations of the multiple compressors included in the multiple compressors; and / or When the current compressor operation mode is a multi-mode and the current operation state of the refrigeration unit is not a multi-system operation state, controlling one of the multiple compressors included in the multiple to start; and / or When the current compressor operation mode is a multi-mode and the current operation state of the refrigeration unit is a multi-system operation state, multiple compressors included in the multiple modes are controlled to start.

7. A compressor control device, characterized in that: The control device comprises: a start-up condition judgment module, used to judge whether the refrigeration unit meets the start-up condition, wherein the refrigeration unit includes a multi-way refrigeration system, the start-up condition includes that at least one of the multi-way refrigeration systems meets the refrigeration condition, and each refrigeration system includes a compressor; and The compressor starting module is used to control one or more compressors of the multi-channel refrigeration system to start when the starting conditions are met.

8. The control device according to claim 7, characterized in that: The compressor start-up module controls one or more of the multiple compressors of the multi-path refrigeration system to start up, including: When one of the multi-circuit refrigeration systems meets the refrigeration condition, controlling the compressor included in the one to start; and / or When multiple units in the multi-channel refrigeration system meet the refrigeration conditions, one or more of the multiple compressors included in the multiple units are controlled to start based on the heating value of the components to be refrigerated and / or the current operating status of the refrigeration unit.

9. The control device according to claim 8, characterized in that: Based on the heat generation of the component to be refrigerated and / or the current operating state of the refrigeration unit, one or more of the plurality of compressors included in the plurality of components are controlled to start, including: When the heating value is less than a first preset heating value, controlling one of the plurality of compressors included in the plurality to start; and / or In the case where the heating value is greater than or equal to a second preset heating value, based on the current operating state of the refrigeration unit, controlling one or more of the plurality of compressors included in the plurality to start, wherein the first preset heating value is less than the second preset heating value; and / or When the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start.

10. The control device according to claim 9, characterized in that: When the heating value is less than the first preset heating value, controlling one of the plurality of compressors included in the plurality to start, comprising: When the current operating state of the refrigeration unit is not a multi-system operating state, based on the respective working hours of multiple compressors included in the multiple compressors, controlling one of the multiple compressors included in the multiple compressors to start; and / or When the current operating state of the refrigeration unit is a multi-system operating state, based on the current compressor working mode, one of the multiple compressors included in the multiple systems is controlled to start or maintain the currently running compressor to continue running.

11. The control device according to claim 9, characterized in that: When the heating value is greater than or equal to a second preset heating value, based on the current operating state of the refrigeration unit, controlling one or more of the plurality of compressors included in the plurality to start, comprises: When the current operating state of the refrigeration unit is not a multi-system operating state, controlling one of the plurality of compressors included in the plurality of compressors to start; and / or When the current operation state of the refrigeration unit is a multi-system operation state, controlling multiple compressors included in the multiple compressors to start; Preferably, when the current operation state of the refrigeration unit is not a multi-system operation state, controlling one of the multiple compressors included in the multiple to start up comprises: determining which compressor to start up based on the respective working hours of the multiple compressors included in the multiple; Preferably, when the current operating state of the refrigeration unit is a multi-system operating state, controlling multiple compressors included in the multiple systems to start includes: when the speed of the currently started compressor reaches its maximum speed, starting the next compressor.

12. The control device according to claim 9, characterized in that: When the heating value is greater than or equal to the first heating value and less than the second heating value, based on the current compressor working mode and the current operating state of the refrigeration unit, one or more of the multiple compressors included in the multiple ones are controlled to start, including: When the current compressor operation mode is a single mode and the current operation state of the refrigeration unit is not a multi-system operation state, based on the respective operation durations of the multiple compressors included in the multiple compressors, controlling one of the multiple compressors included in the multiple compressors to start; and / or When the current compressor operation mode is a single mode and the current operation state of the refrigeration unit is a multi-system operation state, maintaining the currently running compressor to continue to operate or controlling one of the multiple compressors included in the multiple compressors to start based on the respective operation durations of the multiple compressors included in the multiple compressors; and / or When the current compressor operation mode is a multi-mode and the current operation state of the refrigeration unit is not a multi-system operation state, controlling one of the multiple compressors included in the multiple to start; and / or When the current compressor operation mode is a multi-mode and the current operation state of the refrigeration unit is a multi-system operation state, multiple compressors included in the multiple modes are controlled to start.

13. A refrigeration unit, characterized in that: The refrigeration unit comprises a multi-way refrigeration system, each of which comprises a compressor, and a plurality of compressors of the multi-way refrigeration system are controlled based on the control method described in any one of claims 1 to 6.

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