Power supply control method of refrigeration equipment and refrigeration equipment

Abstract

The invention discloses refrigeration equipment and a power supply control method thereof. The refrigeration equipment comprises a compressor, a first energy storage power supply, a second energy storage power supply, a switch module and a controller. The compressor is used for refrigeration. The first energy storage power supply is used for storing and releasing electric energy. The second energy storage power supply is used for storing and releasing electric energy. The switch module is electrically connected with the first energy storage power supply, the second energy storage power supply and the controller. The power supply control method comprises the steps that in response to a starting instruction for a compressor, a switch module is controlled to execute switching, so that a first energy storage power source and a second energy storage power source are connected in parallel to jointly provide starting current for the compressor; and after it is detected that the compressor is started successfully, the switch module is controlled to disconnect the parallel connection of the first energy storage power source and the second energy storage power source, and one of the first energy storage power source and the second energy storage power source is controlled to independently supply power to the compressor.

Description

Technical Field

[0001] This application relates to the field of control technology for refrigeration equipment, and more particularly to a power supply control method for refrigeration equipment and refrigeration equipment. Background Technology

[0002] With the rapid development of cold chain logistics, pharmaceutical storage, and the food industry, the reliable operation of refrigeration equipment (such as freezers, medical refrigerators, and cold chain transport devices) has become crucial. As the core of refrigeration equipment, compressors and other motor-driven loads have extremely high requirements for power supply continuity. Power outages can cause compressors to stop and restart, severely damaging the motor structure and shortening the equipment's lifespan. To ensure uninterrupted operation, uninterruptible power supplies (UPS) are widely used in refrigeration equipment to ensure that the compressor continues to run during mains power outages, maintaining the low temperature inside the refrigeration equipment and preventing the spoilage of stored items (such as medicines, vaccines, and food).

[0003] Currently, when the mains power fails, the compressor is usually started directly by a single energy storage power source. However, the compressor requires a starting current several times its rated current (i.e., "inrush current") at the moment of startup. This large current discharge is significantly damaging to the battery, especially lead-acid or lithium batteries. With frequent start-stop cycles or after the energy storage power source ages, the compressor may fail to start due to insufficient instantaneous output capacity of a single battery pack, causing the refrigeration equipment to lose temperature. Summary of the Invention

[0004] Based on the above problems, this application proposes a power supply control method for refrigeration equipment and refrigeration equipment.

[0005] In a first aspect, this application provides a power supply control method, wherein the refrigeration equipment includes a compressor, a first energy storage power supply, a second energy storage power supply, a switching module, and a controller. The compressor is used for refrigeration. The first energy storage power supply is used for storing and releasing electrical energy. The second energy storage power supply is used for storing and releasing electrical energy. The switching module is electrically connected to the first energy storage power supply, the second energy storage power supply, and the controller. The power supply control method includes: In response to a start command for the compressor, the switching module is controlled to switch, connecting the first energy storage power supply and the second energy storage power supply in parallel to jointly provide starting current for the compressor; and After detecting that the compressor has started successfully, the switch module is controlled to disconnect the parallel connection between the first energy storage power supply and the second energy storage power supply, and one of the first energy storage power supply and the second energy storage power supply is controlled to supply power to the compressor alone.

[0006] In some embodiments, the switching module includes a switching switch, a first switch, and a second switch. The switching switch is connected between the first energy storage power source and the second energy storage power source. The first switch is connected between the positive terminal of the first energy storage power source and the power input terminal of the compressor. The second switch is connected between the positive terminal of the second energy storage power source and the power input terminal of the compressor. Controlling the switching module to perform a switching operation, so that the first energy storage power source and the second energy storage power source are connected in parallel, includes: The switching switch is controlled to switch the conducting contacts, connecting the positive terminal of the first energy storage power source to the positive terminal of the second energy storage power source; Control the first switch to close, so as to connect the positive terminal of the first energy storage power source to the compressor; and The second switch is closed to establish an electrical connection between the positive terminal of the second energy storage power source and the compressor.

[0007] In some embodiments, controlling the switching module to disconnect the parallel connection between the first energy storage power supply and the second energy storage power supply, and controlling one of the first energy storage power supply and the second energy storage power supply to supply power to the compressor separately, includes: Control the switching switch to disconnect the electrical connection between the first energy storage power source and the second energy storage power source; The first switch is turned off, thereby cutting off the electrical connection between the positive terminal of the first energy storage power source and the compressor; and The second switch is kept closed, so that the positive terminal of the second energy storage power source is electrically connected to the compressor.

[0008] In some embodiments, the power supply control method further includes: when the second energy storage power supply is supplying power to the compressor alone, if the power of the second energy storage power supply is lower than a first threshold, switching to the first energy storage power supply supplying power to the compressor alone.

[0009] In some embodiments, after switching to the first energy storage power source supplying power to the compressor alone, the method further includes: charging the second energy storage power source until the charge of the second energy storage power source reaches a second threshold, wherein the second threshold is higher than the first threshold.

[0010] In some embodiments, the power supply control method further includes: detecting the power supply status of the mains power; and, when the mains power supply status is off, sending the start command.

[0011] In some embodiments, after controlling one of the first energy storage power source and the second energy storage power source to supply power to the compressor separately, the power supply control method further includes: When the mains power supply is in the power supply state, control the mains power supply to supply power to the compressor, and stop the second energy storage power supply to supply power to the compressor.

[0012] In some embodiments, the power supply control method further includes: The mains power is controlled to charge the first energy storage power source and / or the second energy storage power source.

[0013] In some embodiments, before controlling the mains power to charge the first energy storage power source and / or the second energy storage power source, the power supply control method further includes: The system controls the energy source with higher power to supply power to the energy source with lower power until the difference between the power of the first energy source and the power of the second energy source is within a preset power difference range.

[0014] Secondly, this application also provides a refrigeration device, which includes a compressor, a first energy storage power supply, a second energy storage power supply, a switch module, and a controller. The compressor is used for refrigeration. The first energy storage power supply is used for storing and releasing electrical energy. The second energy storage power supply is used for storing and releasing electrical energy. The switch module is electrically connected to both the first and second energy storage power supplies. The controller is electrically connected to the switch module and is configured to execute the power supply control method described in any of the above embodiments.

[0015] The power supply control method and refrigeration equipment disclosed in this application utilize a switching module to perform a switching action when the compressor is started, connecting the first and second energy storage power supplies in parallel to jointly provide the starting current for the compressor. This distributes the high current load during compressor startup across the two energy storage power supplies, halving the current surge that would otherwise be borne by a single power supply, mitigating damage from high current, and extending the lifespan of each power supply. Simultaneously, the parallel connection enhances the overall output capacity, ensuring that the starting current requirement is met even when the performance of a single energy storage power supply deteriorates. This improves the compressor's startup success rate under conditions such as aging energy storage power supplies or low temperatures, preventing temperature loss in the refrigeration equipment.

[0016] Additional aspects and advantages of embodiments of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of this application. Attached Figure Description

[0017] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, wherein: Figure 1 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 2 This is a schematic diagram of the structure of a refrigeration device according to certain embodiments of this application; Figure 3 This is another structural schematic diagram of a refrigeration device according to certain embodiments of this application; Figure 4 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 5 This is a schematic diagram of the structure of a refrigeration device according to certain embodiments of this application; Figure 6 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 7 This is a schematic diagram of the structure of a refrigeration device according to certain embodiments of this application; Figure 8 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 9 This is a schematic diagram of the structure of a refrigeration device according to certain embodiments of this application; Figure 10 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 11 This is a schematic diagram of the structure of a refrigeration device according to certain embodiments of this application; Figure 12 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 13 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 14 This is a schematic diagram of the structure of a refrigeration device according to certain embodiments of this application; Figure 15 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 16 This is a schematic diagram of the structure of a refrigeration device according to certain embodiments of this application; Figure 17 This is a flowchart illustrating the power supply control method for a refrigeration device according to certain embodiments of this application; Figure 18 This is a schematic diagram of the structure of a refrigeration device according to certain embodiments of this application.

[0018] Explanation of key component symbols: Refrigeration equipment 100, compressor 10, first energy storage power supply 21, second energy storage power supply 23, switch module 30, switching switch 31, first switch K1, second switch K2, controller 40, charging module 50, mains power 60, mains power detection module 70, mains power supply circuit 80. Detailed Implementation

[0019] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0020] With the rapid development of cold chain logistics, pharmaceutical storage, and the food industry, the reliable operation of refrigeration equipment (such as freezers, medical refrigerators, and cold chain transport devices) has become crucial. As the core of refrigeration equipment, compressors and other motor-driven loads have extremely high requirements for power supply continuity. Power outages can cause compressors to stop and restart, severely damaging the motor structure and shortening the equipment's lifespan. To ensure uninterrupted operation, uninterruptible power supplies (UPS) are widely used in refrigeration equipment to ensure that the compressor continues to run during mains power outages, maintaining the low temperature inside the refrigeration equipment and preventing the spoilage of stored items (such as medicines, vaccines, and food).

[0021] Currently, when the mains power fails, the compressor is usually started directly by a single energy storage power source. However, the compressor requires a starting current several times its rated current (i.e., "inrush current") at startup. This high-current discharge significantly damages the battery, especially lead-acid or lithium batteries. With frequent start-stop cycles or aging of the energy storage power source, the compressor may fail to start due to insufficient instantaneous output capacity of a single battery pack, causing the refrigeration equipment to lose temperature. To address this issue, this application provides a power supply control method for refrigeration equipment (…). Figure 1 (as shown) and refrigeration equipment 100 ( Figure 10 (As shown).

[0022] Please see Figures 1 to 3 In a first aspect, this application provides a power supply control method for a refrigeration device 100, which includes a compressor 10, a first energy storage power supply 21, a second energy storage power supply 23, a switch module 30, and a controller 40. The compressor 10 is used for refrigeration. The first energy storage power supply 21 is used for storing and releasing electrical energy. The second energy storage power supply 23 is used for storing and releasing electrical energy. The switch module 30 is electrically connected to the first energy storage power supply 21, the second energy storage power supply 23, and the controller 40. The power supply control method includes: 03: In response to the start command for compressor 10, the control switch module 30 performs a switching operation, connecting the first energy storage power supply 21 and the second energy storage power supply 23 in parallel to jointly provide starting current for compressor 10; and 04: After detecting that the compressor 10 has started successfully, the control switch module 30 disconnects the parallel connection between the first energy storage power supply 21 and the second energy storage power supply 23, and controls one of the first energy storage power supply 21 and the second energy storage power supply 23 to supply power to the compressor 10 separately.

[0023] Correspondingly, the power supply control method can be applied to the refrigeration equipment 100 provided in the second aspect of this application. Specifically, the refrigeration equipment 100 includes a compressor 10, a first energy storage power supply 21, a second energy storage power supply 23, a switch module 30, and a controller 40. The compressor 10 is used for refrigeration. The first energy storage power supply 21 is used for storing and releasing electrical energy. The second energy storage power supply 23 is used for storing and releasing electrical energy. The switch module 30 is electrically connected to the first energy storage power supply 21, the second energy storage power supply 23, and the controller 40. The switch module 30 is configured to connect or disconnect the electrical connection between the first energy storage power supply 21 and the second energy storage power supply 23, connect or disconnect the electrical connection between the first energy storage power supply 21 and the compressor 10, and connect or disconnect the electrical connection between the second energy storage power supply 23 and the compressor 10. The controller 40 is electrically connected to the switch module 30 and is configured to perform the following actions in response to a start command for the compressor 10: controlling the switch module 30 to switch the first energy storage power supply 21 and the second energy storage power supply 23 in parallel to provide a starting current for the compressor 10; and, after detecting that the compressor 10 has started successfully, controlling the switch module 30 to disconnect the parallel connection between the first energy storage power supply 21 and the second energy storage power supply 23 and controlling one of the first energy storage power supply 21 and the second energy storage power supply 23 to supply power to the compressor 10 separately.

[0024] Compressor 10 is the refrigeration component in refrigeration equipment 100, and is typically a rotary or reciprocating electric compressor. The internal motor of compressor 10 is an inductive load, and it generates a starting current several times the rated current at startup, which places high demands on the instantaneous power output capability of the power supply. Compressor 10 can be encapsulated in the refrigeration circuit of refrigeration equipment 100, and the starting and stopping of compressor 10 are controlled by controller 40 according to temperature settings or power supply commands.

[0025] The first energy storage power source 21 and the second energy storage power source 23 are independent and detachable battery modules, such as lead-acid battery modules, lithium-ion battery modules (e.g., lithium iron phosphate battery modules), or supercapacitor modules, used to provide emergency power when the external mains power 60 is interrupted. Both the first energy storage power source 21 and the second energy storage power source 23 can discharge externally or be charged by an external charging structure to replenish their energy.

[0026] The switching module 30 is the actuator for switching power paths. The switching module 30 can control the on / off state of at least three current paths: one is a path connecting the positive terminal of the first energy storage power source 21 and the positive terminal of the second energy storage power source 23 (for parallel connection); the second is a path connecting the positive terminal of the first energy storage power source 21 and the power supply input terminal of the compressor 10; and the third is a path connecting the positive terminal of the second energy storage power source 23 and the power supply input terminal of the compressor 10. The switching module 30 can be composed of discrete devices (such as electromagnetic relays, contactors) or semiconductor switches (such as power MOSFETs, IGBTs and their drive circuits). The switching module 30 receives control signals from the controller 40 and changes the opening / closing state of its internal contacts by energizing / de-energizing the coil (relay scheme) or by changing the gate / base level (semiconductor scheme).

[0027] The controller 40 is the core component for controlling the power supply in the refrigeration equipment 100. The controller 40 can be a microcontroller (MCU) or a programmable logic controller (PLC). The controller 40 connects to the switch module 30, compressor 10, and mains power detection module 70 (described below) via its input / output (I / O) ports, analog-to-digital converter (ADC) ports, etc. The controller 40 has embedded program logic, enabling it to receive status information from various devices (such as the status of the mains power 60, the voltage / power of the energy storage power supply, the current of the compressor 10, etc.), and perform calculations and judgments according to a preset logic algorithm (i.e., the power supply control method described in this application), ultimately generating and outputting command signals to control the operation of the switch module 30. The controller 40 can be integrated into the refrigeration equipment 100 as a main control board.

[0028] During operation, when the controller 40 determines that the compressor 10 needs to be started by the energy storage power supply (e.g., when the mains power 60 is cut off), it generates a start command and immediately sends a first control signal to the switch module 30, simultaneously connecting the first energy storage power supply 21 and the second energy storage power supply 23, as well as connecting them to the compressor 10. At this time, the two energy storage power supplies are in parallel, with equal output voltages, jointly providing the starting current to the compressor 10. Because parallel connection reduces the equivalent internal resistance and increases the total output capacity, it can cope with the starting surge current and avoid overloading of a single energy storage power supply. Once the compressor 10 starts smoothly and enters the stable operation phase (detected by a current sensor as the operating current drops to the rated range), the controller 40 executes a second control signal, first commanding the switch module 30 to disconnect the parallel connection between the two energy storage power supplies, and then disconnecting the electrical connection between one of the energy storage power supplies and the compressor 10, while maintaining the electrical connection between the other energy storage power supply and the compressor 10. In this way, the refrigeration equipment 100 can transition from a dual-energy storage power supply parallel start mode to a single energy storage power supply continuous power supply operation mode.

[0029] The power supply control method and refrigeration equipment 100 of this application, when starting the compressor 10, utilize the switching module 30 to perform a switching action, connecting the first energy storage power supply 21 and the second energy storage power supply 23 in parallel to jointly provide starting current for the compressor 10. This distributes the high current load during the compressor 10 startup phase to the two energy storage power supplies, halving the current surge that would otherwise be borne by a single energy storage power supply, mitigating damage from high current, and extending the service life of each energy storage power supply. Simultaneously, the parallel connection enhances the overall output capacity, ensuring that the starting current requirement can be met even when the performance of a single energy storage power supply deteriorates. This improves the startup success rate of the compressor 10 under conditions such as energy storage power supply aging or low temperature, preventing the refrigeration equipment 100 from losing temperature.

[0030] Please see Figure 4 and Figure 5 Specifically, in some embodiments, the switching module 30 includes a switching switch 31, a first switch K1, and a second switch K2. The switching switch 31 is connected between the first energy storage power supply 21 and the second energy storage power supply 23. The first switch K1 is connected between the positive terminal of the first energy storage power supply 21 and the power supply input terminal of the compressor 10. The second switch K2 is connected between the positive terminal of the second energy storage power supply 23 and the power supply input terminal of the compressor 10. 03: Controlling the switching module 30 to perform switching, so that the first energy storage power supply 21 and the second energy storage power supply 23 are connected in parallel, includes: 031: Control switch 31 to switch the conducting contact, connecting the positive terminal of the first energy storage power supply 21 to the positive terminal of the second energy storage power supply 23; 033: Control the first switch K1 to close, so that the electrical connection between the positive terminal of the first energy storage power supply 21 and the compressor 10 is established; and 035: Control the second switch K2 to close so that the electrical connection between the positive terminal of the second energy storage power supply 23 and the compressor 10 is made.

[0031] Correspondingly, in the refrigeration equipment 100, the switch module 30 includes a switching switch 31, a first switch K1, and a second switch K2. The switching switch 31 is connected between the first energy storage power supply 21 and the second energy storage power supply 23. The first switch K1 is connected between the positive terminal of the first energy storage power supply 21 and the power supply input terminal of the compressor 10. The second switch K2 is connected between the positive terminal of the second energy storage power supply 23 and the power supply input terminal of the compressor 10. The controller 40 is configured to: control the switching switch 31 to switch the conducting contact to connect the positive terminal of the first energy storage power supply 21 and the positive terminal of the second energy storage power supply 23; control the first switch K1 to close so that the electrical connection between the positive terminal of the first energy storage power supply 21 and the compressor 10 is connected; and control the second switch K2 to close so that the electrical connection between the positive terminal of the second energy storage power supply 23 and the compressor 10 is connected.

[0032] The switching switch 31 is a device in the switching module 30 that enables the electrical connection or disconnection between the positive terminals of the two energy storage power sources. The switching switch 31 includes multiple contacts. One contact is electrically connected to the positive terminal of the first energy storage power source 21 via a wire, busbar, or PCB trace, and another contact is electrically connected to the positive terminal of the second energy storage power source 23 via a wire, busbar, or PCB trace. When the first energy storage power source 21 and the second energy storage power source 23 need to be connected in parallel, the controller 40 sends a control command to the switching switch 31 to change the conduction relationship of its internal contacts, so that current can flow between the positive terminals of the two energy storage power sources, thereby making the voltages of the two energy storage power sources equal and forming a parallel connection, such as... Figure 5 As shown in bold lines. In this embodiment, the switching switch 31 can be an electromagnetic relay / contaminator, or a power MOSFET or IGBT with sufficient current capacity.

[0033] The first switch K1 is a switching device that allows electrical energy from the first energy storage power source 21 to be supplied to the compressor 10. The first switch K1 is connected in series between the positive terminal of the first energy storage power source 21 and the power input terminal of the compressor 10. The second switch K2 is a switching device that allows electrical energy from the second energy storage power source 23 to be supplied to the compressor 10. The second switch K2 is connected in series between the positive terminal of the second energy storage power source 23 and the power input terminal of the compressor 10. The first switch K1 and the second switch K2 each independently control the on / off state of a power supply path. The switching switch 31 establishes a parallel connection between the two energy storage power sources, while the first switch K1 and the second switch K2 establish a power supply relationship between the energy storage power sources and the load (compressor 10), making the power supply control logic clear and enabling complex switching sequences. The first switch K1 and the second switch K2 can also be relays or semiconductor switches.

[0034] In the steps of controlling the switching contact of switch 31, controlling the first switch K1 to close, and controlling the second switch K2 to close, the controller 40 outputs three independent control signals to drive switch 31, the first switch K1, and the second switch K2, respectively. These three control signals can be issued simultaneously or sequentially within a very short time interval (for example, first to switch 31, then to the first switch K1, and finally to the second switch K2). After switch 31, the first switch K1, and the second switch K2 respond to these three control signals, the positive terminals of the first energy storage power source 21 and the second energy storage power source 23 are directly connected (in parallel). Simultaneously, these two parallel positive terminals are connected to the same positive power supply terminal of the compressor 10 through the closed first switch K1 and the second switch K2, respectively. Thus, the two energy storage power sources, connected in parallel, together constitute the power supply for the compressor 10.

[0035] During operation, when the controller 40 determines that the compressor 10 needs to be started, the controller 40 first issues commands to the switching switch 31, the first switch K1, and the second switch K2. Switch 31 switches its conducting contact, short-circuiting the positive terminal of the first energy storage power source 21 with the positive terminal of the second energy storage power source 23. If there is an initial voltage difference between the two, a transient equalization current will be immediately generated until the voltages are equal. Subsequently, or simultaneously, the first switch K1 and the second switch K2 close. At this time, the electrical energy at the parallel positive terminal flows to the compressor 10 through the two parallel paths of the first switch K1 and the second switch K2. Because both paths are conducting simultaneously, the total circuit impedance is reduced, ensuring high current output capability. Thus, the compressor 10 is driven by two parallel energy storage power sources.

[0036] The power supply control method and refrigeration equipment 100 of this application embodiment are implemented by setting a switch module 30 including a switching switch 31, a first switch K1 and a second switch K2, and controlling the switching switch 31 to conduct the positive terminals of the two energy storage power sources, while closing the first switch K1 and the second switch K2. In this way, the positive terminals of the first energy storage power source 21 and the second energy storage power source 23 are physically connected in parallel by the switching switch 31, and the parallel electrical energy is led to the compressor 10 by the first switch K1 and the second switch K2. Thus, the first energy storage power source 21 and the second energy storage power source 23 are connected in parallel to jointly supply power to the compressor 10.

[0037] Please see Figure 6 and Figure 7 Specifically, in some embodiments, 04: the control switch module 30 disconnects the parallel connection between the first energy storage power supply 21 and the second energy storage power supply 23, and controls one of the first energy storage power supply 21 and the second energy storage power supply 23 to supply power to the compressor 10 separately, including: 041: Control switch 31 to disconnect the electrical connection between the first energy storage power supply 21 and the second energy storage power supply 23; 043: Control the first switch K1 to open, thereby cutting off the electrical conduction between the positive terminal of the first energy storage power supply 21 and the compressor 10; and 045: Control the second switch K2 to remain closed, so that the positive terminal of the second energy storage power supply 23 is electrically connected to the compressor 10.

[0038] Correspondingly, in the refrigeration equipment 100, the controller 40 is also configured to: control the switching switch 31 to disconnect the electrical connection between the first energy storage power supply 21 and the second energy storage power supply 23; control the first switch K1 to open, so that the electrical connection between the positive terminal of the first energy storage power supply 21 and the compressor 10 is cut off; and control the second switch K2 to remain closed, so that the electrical connection between the positive terminal of the second energy storage power supply 23 and the compressor 10 is maintained.

[0039] The purpose of controlling the switching switch 31 to disconnect the electrical connection between the first energy storage power source 21 and the second energy storage power source 23 is to electrically decouple the parallel connection between the two energy storage power sources. During the compressor 10 startup phase, the contacts or channels of the switching switch 31 are in the first state. In this state, the positive terminals of the first energy storage power source 21 and the second energy storage power source 23 are directly short-circuited, and the voltages of the first and second energy storage power sources are the same. When the controller 40 issues a disconnection command, the connection between the positive terminals of the first and second energy storage power sources 21 and 23 is severed, and the positive terminals of the first and second energy storage power sources 21 and 23 become two independent electrical nodes, whose voltages can vary independently depending on their internal states or load conditions.

[0040] The first switch K1 is connected in series between the first energy storage power source 21 and the compressor 10. The controller 40 controls the first switch K1 to open, that is, cuts off the path for the first energy storage power source 21 to supply current to the compressor 10, causing the first energy storage power source 21 to exit the power supply state. Meanwhile, the controller 40 controls the second switch K2 to remain closed, ensuring that the power supply path between the second energy storage power source 23 and the compressor 10 remains unobstructed. In other embodiments, if the first energy storage power source 21 is selected to supply power alone, the operation logic is symmetrical, becoming controlling the second switch K2 to open and controlling the first switch K1 to remain closed.

[0041] Please combine Figure 6 and Figure 7 Looking at the bolded part, after compressor 10 completes startup ( Figure 6 As shown), the controller 40 first drives the switching switch 31 to perform a switching operation, causing its internal contacts to separate or the channel to close, physically disconnecting the positive terminal of the first energy storage power source 21 from the positive terminal of the second energy storage power source 23. After a short delay, the controller 40 then drives the first switch K1 to open, and the first energy storage power source 21 is completely disconnected from the entire power supply circuit. Figure 7 (As shown). Throughout the process, the second switch K2 remains closed, so the voltage of the compressor 10 is always maintained by the second energy storage power source 23, the power supply is never interrupted, and the compressor 10 continues to operate smoothly.

[0042] The power supply control method and refrigeration equipment 100 of this application, after the compressor 10 starts successfully, sequentially control the switching switch 31 to perform a switching action to disengage the parallel connection, then open the first switch K1 to cut off one power supply, while keeping the second switch K2 closed to maintain the other power supply. In this way, electrical isolation between the two energy storage power sources is first achieved, and then the power supply responsibility is transferred to a single circuit. This ensures that the power supply to the compressor 10 is continuous and uninterrupted during the switch from the parallel high-current power supply mode to the single-circuit continuous power supply mode, and that the operation is undisturbed. This timing control logic avoids circulating currents, arcing, or momentary power outages that may occur during the switching process, improving the safety and reliability of the entire power supply switching process.

[0043] Please see Figure 8 and Figure 9 In some embodiments, the power supply control method further includes: 05: When the second energy storage power source 23 supplies power to the compressor 10 alone, if the power of the second energy storage power source 23 is lower than the first threshold, the power supply to the compressor 10 is switched to be supplied by the first energy storage power source 21 alone.

[0044] Correspondingly, in the refrigeration equipment 100, the controller 40 is also configured to: when the second energy storage power supply 23 supplies power to the compressor 10 alone, if the power of the second energy storage power supply 23 is lower than the first threshold, then switch to the first energy storage power supply 21 supplying power to the compressor 10 alone.

[0045] When the second energy storage power source 23 supplies power to the compressor 10 alone, the first switch K1 is in the open state, and the second switch K2 remains closed. That is, as Figure 7 As shown, electrical energy flows from the positive terminal of the second energy storage power source 23, passes through the closed second switch K2, flows to the compressor 10, then flows back to the common ground wire, and finally returns to the negative terminal of the second energy storage power source 23, forming a complete independent power supply circuit. In this state, the first energy storage power source 21 is not connected in parallel with the second energy storage power source 23, nor is it connected to the compressor 10; it is in a standby or reserve state.

[0046] The charge level of the second energy storage power source 23 is a parameter characterizing its remaining usable energy, which is typically estimated by monitoring the terminal voltage and current of the second energy storage power source 23 and combining this with its internal resistance. In some embodiments, the terminal voltage of the second energy storage power source 23 can be directly used as an approximate representation of the charge level (or state of charge, SOC), and when the voltage drops to a certain set value, the charge level is considered insufficient. In other embodiments, the controller 40 can be integrated with or connected to an external battery management unit (BMS) to obtain more accurate remaining charge information.

[0047] The first threshold is a preset power threshold used to trigger a switching action. The first threshold is typically higher than the discharge cutoff voltage of the second energy storage power source 23 to ensure that the second energy storage power source 23 still has sufficient power margin when switching occurs, preventing damage due to complete over-discharge. The specific value of the first threshold can be set according to the type of the second energy storage power source 23 (such as lead-acid battery or lithium battery), its chemical characteristics, the ambient temperature, and the range safety margin requirements of the refrigeration equipment 100. It can be set before leaving the factory or can be changed by the user after leaving the factory.

[0048] The controller 40 periodically or in real-time acquires the power information of the second energy storage power source 23 and compares it with a first threshold stored internally in the controller 40. When the comparison result indicates that the power of the second energy storage power source 23 is lower than the first threshold, the controller 40 will execute the subsequent switching process, that is, switch to the first energy storage power source 21 supplying power to the compressor 10 alone, such as... Figure 9 As shown in bold, the controller 40 sends a new control command to the switch module 30. In one embodiment, the controller 40 first controls the second switch K2 to open, and then immediately controls the first switch K1 to close. In another embodiment, before the second switch K2 opens, the controller 40 first controls the first switch K1 to close, allowing the first energy storage power supply 21 to connect in advance and establish an electrical connection with the compressor 10, and then disconnects the second switch K2. This achieves a smoother power transfer and avoids the compressor 10 from shutting down due to a momentary power outage. Regardless of the method used, the final result is: the first switch K1 is closed, the second switch K2 is open, and the first energy storage power supply 21 supplies power to the compressor 10 alone.

[0049] During operation, when the refrigeration equipment 100 is running in a mode solely powered by the second energy storage power source 23 ( Figure 7 As shown), the controller 40 continuously monitors the power level of the second energy storage power source 23. Once the power level of the second energy storage power source 23 drops below a first threshold, the controller 40 immediately initiates a switching mechanism, controlling the first switch K1 and the second switch K2 to change their on / off states. This seamlessly switches the path of the compressor 10 current from flowing through the second energy storage power source 23 and the second switch K2 to flowing through the first energy storage power source 21 and the first switch K1. Figure 9 As shown. After the switch is completed, the second energy storage power supply 23 is disconnected from the power supply state, the first energy storage power supply 21 takes over its work, the compressor 10 continues to run, and the operating time of the refrigeration equipment 100 is extended.

[0050] The power supply control method and refrigeration equipment 100 of this application monitor the power level of the second energy storage power source 23, which is supplied independently, and automatically switch to the first energy storage power source 21 when the power level falls below a first threshold. This achieves real-time monitoring and intelligent management of the power status of the energy storage power sources. When the power level of the second energy storage power source 23 is about to run out, the backup first energy storage power source 21 is automatically activated to take over the power supply, thereby preventing deep damage or failure of a single energy storage power source due to over-discharge and extending its service life. Simultaneously, this intelligent switching mechanism seamlessly extends the total operating time of the refrigeration equipment 100 in the event of a mains power outage, improving the continuous cold preservation capability of the refrigeration equipment 100.

[0051] Please see Figure 10 and Figure 11 In some embodiments, after switching to sole power supply for compressor 10 from the first energy storage power source 21, the method further includes: 06: Charge the second energy storage power source 23 until the power of the second energy storage power source 23 reaches the second threshold, which is higher than the first threshold.

[0052] Correspondingly, the refrigeration equipment 100 also includes a charging module 50; the controller 40 is further configured to: after switching to the first energy storage power supply 21 to supply power to the compressor 10 alone, control the charging module 50 to charge the second energy storage power supply 23 until the power of the second energy storage power supply 23 reaches a second threshold, the second threshold being higher than the first threshold.

[0053] After switching to sole power supply for compressor 10 from the first energy storage power source 21, the power supply responsibility has been transferred. The first energy storage power source 21 is now supplying power to compressor 10 through the closed first switch K1. Figure 9 As shown. The second energy storage power source 23 has been disconnected from the power supply circuit and is in a low state of idleness, standby, and power consumption below the first threshold. This state allows for energy replenishment of the second energy storage power source 23 without affecting the operation of the compressor 10.

[0054] The charging module 50 is responsible for converting external electrical energy (which can be restored AC power 60 or an independent charging power source) into a form of electrical energy suitable for charging the energy storage power source. The charging module 50 can be a standalone AC-DC charger or integrated into the controller 40 or the main power board. The charging module 50 has basic charging control functions such as constant current and constant voltage, and can receive instructions from the controller 40 to start, stop, or adjust charging parameters. The ports of the charging module 50 are connected to the positive and negative terminals of the second energy storage power source 23 via wires. In a more integrated system, the charging module 50 may selectively charge the first energy storage power source 21 and the second energy storage power source 23.

[0055] When the system is powered solely by the first energy storage power source 21 and the second energy storage power source 23 is in low-battery standby mode, the controller 40 sends a start signal to the charging module 50 and may set charging parameters (such as the charging current). The charging module 50 then begins operation, obtaining energy from an external power source and injecting current into the second energy storage power source 23 in a controlled manner, gradually increasing its voltage and charge. This operation is performed in the background and does not affect the normal power supply of the compressor 10 from the first energy storage power source 21 in the foreground.

[0056] The second threshold is a preset target power level higher than the first threshold. It indicates that the energy storage power source is fully charged and ready to be put into operation at any time. The second threshold is much higher than the first threshold; for example, the first threshold may correspond to 20% of the State of Charge (SOC), while the second threshold may correspond to 80% or 90% of the SOC. Setting a second threshold instead of charging to 100% is to extend the lifespan of the energy storage power source (avoiding long-term full-charge storage).

[0057] During charging, the controller 40 (or the management chip within the charging module 50) continuously monitors the power level (or terminal voltage) of the second energy storage power source 23. When the monitored power level equals or exceeds a preset second threshold, the charging completion condition is met. At this time, the controller 40 sends a command to the charging module 50 to stop charging, or the charging module 50 automatically switches to trickle / float charging maintenance mode. The second energy storage power source 23 then enters a "high power standby" state, and its power level is sufficient to support its immediate use when needed (e.g., when the power level of the first energy storage power source 21 is also below the first threshold, or when the refrigeration equipment 100 needs to be restarted in parallel).

[0058] In practice, after the power supply switch from the second energy storage power source 23 to the first energy storage power source 21 is completed, the controller 40 immediately detects external conditions (e.g., whether the mains power 60 has been restored). If charging conditions are met (e.g., the mains power 60 has been restored, or the refrigeration equipment 100 is equipped with an independent charging power source), the controller 40 starts the charging module 50 and controls the charging module 50 to charge the second energy storage power source 23. The controller 40 continuously obtains power feedback from the second energy storage power source 23, and stops charging when the power reaches a second threshold. At this time, the refrigeration equipment 100 has a first energy storage power source 21 that is supplying power and continuously consuming power, and a second energy storage power source 23 that has been charged to a high level and is ready for use, thus preparing for subsequent continuous operation or a possible new round of switching.

[0059] The power supply control method and refrigeration equipment 100 of this application, after switching to power supply from the first energy storage power supply 21, immediately charge the second energy storage power supply 23 that has just been disconnected from the power supply until the power of the second energy storage power supply 23 reaches a higher second threshold. In this way, a rapid energy replenishment mechanism is established for the backup power supply that has consumed power, so that it can be restored to a high power standby state in the shortest possible time, thereby ensuring that the refrigeration equipment 100 always has at least one set of energy storage power supply with sufficient power that can be put into operation at any time.

[0060] Please see Figure 2 and Figure 12 In some embodiments, the power supply control method further includes: 01: Detect the power supply status of 60V AC mains; and, 02: When the mains power supply status is off, send a start command.

[0061] Correspondingly, the refrigeration equipment 100 also includes a mains power detection module 70; the controller 40 is further configured to: control the mains power detection module 70 to detect the power supply status of the mains power 60; and, when the mains power 60 is in a power outage state, send a start command.

[0062] Detecting the power supply status of the mains power supply 60 is the initialization and continuous monitoring step of the power supply control method. Mains power 60, i.e., the AC power supply provided by the public power grid, is usually the preferred and primary energy source for the refrigeration equipment 100 under normal operating conditions. The power supply status of mains power 60 mainly refers to whether mains power 60 is properly connected and can provide the required voltage and frequency to the refrigeration equipment 100. In practical applications, a "power outage" state may manifest in various forms of faults, such as zero voltage, voltage below the normal operating range (undervoltage), voltage above the normal operating range (overvoltage), or abnormal frequency. Detecting this state is the direct basis for the refrigeration equipment 100 to determine whether it needs to activate the backup energy storage power supply.

[0063] The mains power detection module 70 is used to detect the status of the mains power 60. The mains power detection module 70 typically includes a voltage sampling circuit, a signal conditioning circuit, and isolation and conversion circuits. The voltage sampling circuit obtains a low-voltage signal proportional to the mains power 60 voltage from the mains power 60 input line; the signal conditioning circuit (such as filtering and amplification) processes this signal to make it suitable for the controller 40 to read; the isolation circuit (such as an optocoupler) is used to electrically isolate the high-voltage mains power 60 side from the low-voltage side of the controller 40 to ensure safety. The output of the mains power detection module 70 is typically a digital level signal (e.g., high level indicates normal mains power 60, low level indicates power failure) or an analog signal (e.g., DC voltage representing the effective value of the mains power 60 voltage), directly connected to the general purpose input / output (GPIO) port or analog-to-digital converter (ADC) port of the controller 40.

[0064] The controller 40 is configured to control the mains power detection module 70 to detect the power supply status of the mains power 60. Specifically, the controller 40 can passively read the signal output by the mains power detection module 70, or actively control the detection process, for example, by sending a sampling start signal to the mains power detection module 70, or periodically reading the values ​​of its ADC channel. The controller 40 can acquire the data output by the mains power detection module 70 according to a preset sampling frequency (e.g., several times per second) to determine the power supply status of the mains power 60, and send a start command when the mains power 60 is de-energized.

[0065] In operation, after the refrigeration unit 100 is powered on, the mains power detection module 70 begins continuous operation, and the controller 40 synchronously and periodically reads the data output by the mains power detection module 70. When the mains power 60 is normal, the controller 40 maintains the current state and may control the compressor 10 to run directly on the mains power 60. Once a fault occurs in the mains power 60, causing a change in the output signal of the mains power detection module 70, the controller 40 can immediately detect this change in the next sampling cycle. After confirming a valid power failure event, the controller 40 generates and issues a start command. This start command is transmitted to the switching module 30, the compressor 10 drive logic, and other parts, thereby initiating the aforementioned backup power supply process.

[0066] The power supply control method and refrigeration equipment 100 of this application detect the power supply status of the mains power 60 and automatically send a start command when the status is "power outage". Thus, the presence or absence of mains power 60 is used as a criterion for triggering the operation of the energy storage power supply, thereby achieving automatic switching from mains power 60 to energy storage power supply. No user intervention is required; the refrigeration equipment 100 can automatically activate its emergency plan the instant the mains power 60 is interrupted, avoiding start-up delays caused by the failure of personnel to intervene in a timely manner and ensuring that the items inside the refrigeration equipment 100 do not deteriorate due to temperature loss.

[0067] Please see Figure 13 and Figure 14 In some embodiments, after controlling one of the first energy storage power source 21 and the second energy storage power source 23 to supply power to the compressor 10 separately, the power supply control method further includes: 07: When the mains power 60 is in the power supply state, control the mains power 60 to supply power to the compressor 10, and stop one of the first energy storage power supply 21 and the second energy storage power supply 23 from supplying power to the compressor 10.

[0068] Correspondingly, the refrigeration equipment 100 also includes a mains power supply circuit 80; the controller 40 is further configured to: when the mains power supply 60 is in the power supply state, control the mains power 60 to supply power to the compressor 10 through the mains power supply circuit 80, and stop one of the first energy storage power supply 21 and the second energy storage power supply 23 from supplying power to the compressor 10.

[0069] After controlling one of the first energy storage power source 21 and the second energy storage power source 23 to supply power to the compressor 10 alone, the power supply of the refrigeration equipment 100 is in emergency power supply mode. The operation of the compressor 10 depends entirely on the energy storage power source (if it is the second energy storage power source 23), and the mains power 60 is in a state of absence or unavailable. The controller 40 continuously monitors the status of the mains power 60 and waits for the mains power 60 to be restored.

[0070] The mains power supply circuit 80 is the circuit structure that implements the path control of the mains power 60. In some embodiments, the mains power supply circuit 80 includes an AC contactor, the coil of which is controlled by the controller 40 through a drive circuit. When the controller 40 needs to connect the mains power 60, it supplies power to the coil of the contactor, causing its main contacts to close and leading the mains power 60 to the compressor 10.

[0071] When the controller 40 determines, based on the data detected by the mains power detection module 70, that the mains power 60 voltage has recovered and stabilized within the normal range, the controller 40 can then determine that the refrigeration equipment 100 can switch back from the emergency power supply mode to the economical and stable mains power 60 power supply mode. The controller 40 typically sets a brief confirmation delay or filtering judgment to avoid frequent switching due to the instantaneous recovery and instability of the mains power 60.

[0072] Specifically, the controller 40 issues a control command, activating the mains power supply circuit 80, allowing the mains power 60 to directly drive the compressor 10's motor. At this time, the compressor 10's operating characteristics (such as start-up and operation) are directly supported by the mains power 60, ensuring the compressor 10's performance and stability. Before switching back to the mains power 60, the compressor 10 is powered by a storage power source (e.g., the second storage power source 23). To completely transfer power supply responsibility to the mains power 60 and prevent conflicts between the mains power 60 and the storage power source, the storage power source must be disconnected simultaneously with or before the mains power 60 is activated. The controller 40 sends a disconnect command to the corresponding switch (e.g., the second switch K2) to stop the second storage power source 23 from supplying power, completely disconnecting it from the power supply circuit. Figure 14 As shown.

[0073] Please combine Figure 7 and Figure 14In specific operation, when the second energy storage power source 23 supplies power to the compressor 10 alone, the controller 40 continuously receives signals from the mains power detection module 70. Once the signal indicates that the mains power 60 has been restored, the controller 40 initiates the switchback process. First, the controller 40 controls the second switch K2 to open, cutting off the power supply to the second energy storage power source 23. Next, the controller 40 drives the mains power supply circuit 80 to conduct, allowing the mains power 60 to supply power to the compressor 10. At this point, the compressor 10 has successfully switched from being powered by the energy storage power source to being powered by the mains power 60. The second energy storage power source 23 then enters a charging or standby state.

[0074] The power supply control method and refrigeration equipment 100 of this application, when the mains power 60 is restored, control the mains power 60 to supply power to the compressor 10 and stop the first energy storage power supply 21 or the second energy storage power supply 23. In this way, the power supply mode is automatically switched from the energy storage power supply to the mains power 60. This allows the refrigeration equipment 100 to give priority to the use of the more economical, stable and unlimited capacity energy of the mains power 60 when it is available, thereby saving the energy of the energy storage power supply and freeing the energy storage power supply from the load of continuous power supply, so that the energy storage power supply can be charged or rested for maintenance.

[0075] Please see Figure 15 and Figure 16 In some embodiments, the power supply control method further includes: 09: Control the mains power 60 to charge the first energy storage power source 21 and / or the second energy storage power source 23.

[0076] Correspondingly, in the refrigeration equipment 100, the controller 40 is also configured to: after controlling the mains power 60 to supply power to the compressor 10, control the mains power 60 to charge the first energy storage power supply 21 and / or the second energy storage power supply 23.

[0077] After the mains power 60 supplies power to the compressor 10, the power supply task for the compressor 10 is now undertaken by the mains power 60. The mains power 60 provides a stable and sufficient supply of energy, and its operating cost is usually lower than the recycling cost of the energy storage power source. This allows the refrigeration equipment 100 to make full use of the surplus capacity of the mains power 60 and perform maintenance operations on the energy storage power source, i.e., charging, without affecting the refrigeration function.

[0078] The controller 40 controls the mains power 60 to charge the first energy storage power source 21 and / or the second energy storage power source 23. "And / or" means that the controller 40 can decide which one or more energy storage power sources to charge based on a preset strategy. In some embodiments, the controller prioritizes charging the energy storage power source with lower power to balance the two. In other embodiments, both energy storage power sources are charged simultaneously to restore overall backup capacity as quickly as possible. In still other embodiments, the controller intelligently selects the charging target based on load history and prediction. Controlling the charging includes one of the following: the controller 40 issues a charging start command, manages the charging process, etc., which may include setting a charging mode (constant current, constant voltage), monitoring the charging status, and executing stop or protection actions when charging is complete or abnormal.

[0079] The power supply control method and refrigeration equipment 100 of this application embodiment, after switching back to the mains power 60, control the mains power 60 to charge the first energy storage power supply 21 and / or the second energy storage power supply 23. In this way, by utilizing the resources of the mains power 60, the energy storage power supply that has consumed power in performing backup tasks is replenished in a timely manner, ensuring that the energy storage power supply is fully charged in a timely manner and always in a standby state, so as to make sufficient preparations for the next mains power 60 interruption and improve the reliability of the power supply of the refrigeration equipment 100.

[0080] Please see Figure 17 and Figure 18 In some embodiments, before controlling the mains power 60 to charge the first energy storage power source 21 and / or the second energy storage power source 23, the power supply control method further includes: 08: Control the higher power level of the first energy storage power source 21 and the second energy storage power source 23 to supply power to the lower power level until the difference between the power level of the first energy storage power source 21 and the power level of the second energy storage power source 23 is within a preset power difference range.

[0081] Correspondingly, in the refrigeration equipment 100, the controller 40 is also configured to: before controlling the mains power 60 to charge the first energy storage power supply 21 and / or the second energy storage power supply 23, control the higher power supply of the first energy storage power supply 21 and the second energy storage power supply 23 to supply power to the lower power supply, until the difference between the power of the first energy storage power supply 21 and the power of the second energy storage power supply 23 is within a preset range.

[0082] Before the mains power 60 charges the first energy storage power supply 21 and / or the second energy storage power supply 23, the mains power 60 has restored and taken over the power supply to the compressor 10, and the energy storage power supplies are all in a standby state disconnected from the power supply circuit.

[0083] The energy storage power source with the higher charge level in the first energy storage power source 21 and the second energy storage power source 23 supplies power to the energy storage power source with the lower charge level, that is, energy is transferred from the energy storage power source with a higher state of charge to the energy storage power source with a lower state of charge. The controller 40 controls the switching switch 31 so that the two energy storage power sources can form a temporary series connection, in which electrical energy flows from the high potential end to the low potential end.

[0084] The "preset range" is a very small value representing the upper limit of the allowable difference in charge between two energy storage sources. This preset range can be set according to the total capacity of the energy storage sources, the accuracy and efficiency of the balancing circuit, for example, 3% or 5% of the total capacity. After initiating balancing, the controller 40 continuously compares the charge difference between the two energy storage sources. Once the difference decreases to within the preset range, the balancing target is considered to have been achieved, and the controller 40 terminates the current balancing operation, disconnecting or closing the temporary energy transfer path. This ensures that the initial charge levels of the two energy storage sources are highly consistent when entering the subsequent charging phase.

[0085] In actual operation, before the controller 40 is ready to start charging, it first reads the power information of the first energy storage power source 21 and the second energy storage power source 23 (which can be obtained through voltage sampling or BMS communication). By comparison, the controller 40 identifies the one with the higher power and the one with the lower power. Then, the controller 40 operates the switching module 30 to establish a controlled discharge circuit between the two energy storage power sources. In this circuit, the energy storage power source with the higher power serves as a temporary power source, "charging" or injecting energy into the energy storage power source with the lower power. The controller 40 monitors the power changes of both in real time. As energy is transferred, the power of the lower energy source increases, and the power of the higher energy source decreases, and the difference between the two continuously narrows. When the controller 40 determines that the difference has entered a preset range, it issues a command to stop the balancing operation (such as disconnecting the switching switch 31). At this point, the two energy storage power sources are in a basically balanced state. Subsequently, the controller 40 will enter the process of charging the energy storage power sources from the mains power 60, providing efficient and synchronous power replenishment to the first energy storage power source 21 and the second energy storage power source 23.

[0086] The power supply control method and refrigeration equipment 100 of this application, before controlling the mains power 60 to charge the energy storage power, first control the energy storage power with higher power to supply power to the energy storage power with lower power until the power difference between the two is within a preset range. In this way, before the external mains power 60 starts charging, an active energy balancing is performed between the energy storage power internally, so that the state of charge (SOC) of the two energy storage power is consistent at the starting point of charging. This can effectively prevent the performance shortcomings of a single energy storage power source from limiting the overall performance of the entire energy storage power system due to the imbalance of long-term cyclic use, thereby improving the overall efficiency and consistency of subsequent external charging, helping to delay the overall performance degradation of the energy storage power, and extending the comprehensive service life of the entire energy storage power system.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0088] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the function involved, as will be understood by those skilled in the art to which embodiments of this application pertain.

[0089] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable storage medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, a computer-readable storage medium can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable storage media can even be paper or other suitable media on which programs can be printed, since programs can be obtained electronically, for example, by optically scanning the paper or other media, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0090] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0091] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium. When executed, the program includes one or a combination of the steps of the method embodiments. Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. The storage medium mentioned above can be a read-only memory, a disk, or an optical disk, etc.

[0092] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A power supply control method for a refrigeration device, characterized in that, The refrigeration equipment includes a compressor, a controller, a first energy storage power supply, a second energy storage power supply, and a switch module. The compressor is used for refrigeration, the first energy storage power supply is used for storing and releasing electrical energy, the second energy storage power supply is used for storing and releasing electrical energy, and the switch module is electrically connected to the first energy storage power supply, the second energy storage power supply, and the controller. The power supply control method includes: In response to a start command for the compressor, the switching module is controlled to switch, so that the first energy storage power supply and the second energy storage power supply are connected in parallel to jointly provide start-up current for the compressor; and After detecting that the compressor has started successfully, the switch module is controlled to disconnect the parallel connection between the first energy storage power supply and the second energy storage power supply, and one of the first energy storage power supply and the second energy storage power supply is controlled to supply power to the compressor alone.

2. The power supply control method according to claim 1, characterized in that, The switching module includes a switching switch, a first switch, and a second switch. The switching switch is connected between the first energy storage power source and the second energy storage power source. The first switch is connected between the positive terminal of the first energy storage power source and the power input terminal of the compressor. The second switch is connected between the positive terminal of the second energy storage power source and the power input terminal of the compressor. The control of the switching module to perform switching, so that the first energy storage power supply and the second energy storage power supply are connected in parallel, includes: The switching switch is controlled to switch the conducting contacts, connecting the positive terminal of the first energy storage power source to the positive terminal of the second energy storage power source; Control the first switch to close, so as to connect the positive terminal of the first energy storage power source to the compressor; and The second switch is closed to establish an electrical connection between the positive terminal of the second energy storage power source and the compressor.

3. The power supply control method according to claim 2, characterized in that, The control of the switching module to disconnect the parallel connection between the first energy storage power supply and the second energy storage power supply, and to control one of the first energy storage power supply and the second energy storage power supply to supply power to the compressor separately, includes: Control the switching switch to disconnect the electrical connection between the first energy storage power source and the second energy storage power source; The first switch is turned off, thereby cutting off the electrical connection between the positive terminal of the first energy storage power source and the compressor; and The second switch is kept closed, so that the positive terminal of the second energy storage power source is electrically connected to the compressor.

4. The power supply control method according to any one of claims 1 to 3, characterized in that, Also includes: When the second energy storage power source supplies power to the compressor alone, if the power of the second energy storage power source is lower than the first threshold, the power supply to the compressor is switched to be supplied by the first energy storage power source alone.

5. The power supply control method according to claim 4, characterized in that, After switching to the compressor being powered solely by the first energy storage power source, the following is also included: The second energy storage power source is charged until the power of the second energy storage power source reaches a second threshold, which is higher than the first threshold.

6. The power supply control method according to claim 1, characterized in that, Also includes: Detect the status of mains power supply; and When the mains power supply is interrupted, the start command is sent.

7. The power supply control method according to claim 6, characterized in that, After controlling one of the first energy storage power source and the second energy storage power source to supply power to the compressor separately, the power supply control method further includes: When the mains power supply is in the power supply state, the mains power supply is controlled to supply power to the compressor, and the first energy storage power supply and the second energy storage power supply are stopped from supplying power to the compressor.

8. The power supply control method according to claim 7, characterized in that, Also includes: The mains power is controlled to charge the first energy storage power source and / or the second energy storage power source.

9. The power supply control method according to claim 8, characterized in that, Before controlling the mains power to charge the first energy storage power source and / or the second energy storage power source, the power supply control method further includes: The system controls the energy source with higher power to supply power to the energy source with lower power until the difference between the power of the first energy source and the power of the second energy source is within a preset power difference range.

10. A refrigeration device, characterized in that, The refrigeration equipment includes: Compressor, used for refrigeration; The first energy storage power source is used to store and release electrical energy; The second energy storage power source is used to store and release electrical energy; A switching module, electrically connected to the first energy storage power supply, the second energy storage power supply, and the compressor, is configured to turn on or off the first energy storage power supply and the second energy storage power supply, turn on or off the first energy storage power supply and the compressor, and turn on or off the second energy storage power supply and the compressor; and The controller is electrically connected to the switching module and is configured to perform the power supply control method of any one of claims 1 to 9.

Images