Method and apparatus for cold distribution, refrigeration device and computer readable medium

Abstract

The application relates to a cold quantity distribution method and device, a refrigeration equipment and a computer readable medium. The method comprises the following steps: calculating the current refrigeration demand and freezing demand of the refrigeration equipment; determining a target cold quantity distribution strategy according to the refrigeration demand and the freezing demand; controlling the operation states of the refrigeration circuit and the freezing circuit respectively according to the target cold quantity distribution strategy, and controlling the on-off of the bypass pipeline according to the target cold quantity distribution strategy, so that the refrigeration evaporator in the refrigeration circuit is reused as an auxiliary condenser of the freezing circuit through the bypass pipeline, or the cold quantity of the freezing circuit is supplemented to the refrigeration circuit through the bypass pipeline, so that the cold quantity is distributed according to the actual demand of the refrigeration equipment. The application controls the operation states of the refrigeration circuit and the freezing circuit, and adjusts the on-off of the bypass pipeline between the two, so as to schedule the cross-circuit cold quantity, realize on-demand distribution of the cold quantity, and solve the technical problem that the cold quantity distribution of the existing refrigerator cannot adapt to the real-time demand of each temperature zone.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigerators, and in particular to a cold quantity distribution method and device, a refrigeration equipment and a computer readable medium. BACKGROUND

[0002] At present, as a common refrigeration storage device in family and commercial scenes, the temperature control precision and refrigeration energy efficiency of the multi-temperature zone (refrigeration, freezing, variable temperature room) of the refrigerator directly affect the storage quality of food and the use cost. In the existing refrigerator, whether it is a traditional single-cycle refrigeration system or a partially improved double-cycle system, there is a technical problem that the cold quantity distribution cannot adapt to the real-time demand of each temperature zone. Specifically, the traditional single-cycle refrigeration system only relies on a single compressor and a damper adjustment to realize multi-temperature zone temperature control. When running, the freezing room refrigeration will cause the refrigeration room to be excessively cooled, and when the refrigeration demand is high, it will cause the freezing room temperature to fluctuate greatly, and the temperature cross-talk problem is significant. Moreover, the single compressor cannot accurately output cold quantity according to the difference in heat load of different temperature zones, which is easy to produce redundant refrigeration and cause energy efficiency loss. For the refrigerator with a variable temperature room, the temperature adjustment range is limited by the single-cycle system. When starting the extreme working conditions such as the quick freezing mode, in order to ensure the cold quantity supply of the freezing room, the refrigeration of the refrigeration room is often forced to stop, which further reduces the flexibility of multi-temperature zone use. Even though the existing double-cycle system relieves the temperature cross-talk through independent circuits, the cold quantity distribution still adopts a fixed strategy and cannot dynamically schedule the refrigeration resources according to the real-time heat load changes of each temperature zone. For example, when the freezing room needs to be quickly cooled (such as quick freezing demand) or the refrigeration room needs high cold quantity (such as a large amount of food being put in), the system cannot flexibly adjust the cross-circuit cold quantity distribution, resulting in insufficient or excessive cold quantity in some temperature zones under extreme conditions. There are still problems of insufficient energy efficiency optimization and delayed temperature control response, which is difficult to meet the demand for high-precision temperature control and high energy efficiency of high-end household and commercial cold chain equipment.

[0003] At present, there is no effective solution to the technical problem that the cold quantity distribution of the existing refrigerator cannot adapt to the real-time demand of each temperature zone. SUMMARY

[0004] The present application provides a cold quantity distribution method, device, refrigeration equipment and computer readable medium to solve the technical problem that the existing refrigerator cannot adapt to the real-time demand of each temperature zone.

[0005] According to an aspect of the embodiments of the present application, the present application provides a cold quantity distribution method, applied to a refrigeration device equipped with a refrigeration circuit and a freezing circuit which are independent of each other, and a bypass pipeline is arranged between the refrigeration circuit and the freezing circuit, the method comprising: calculating a current refrigeration demand and a current freezing demand of the refrigeration device; determining a target cold quantity distribution strategy according to the refrigeration demand and the freezing demand; controlling the operating states of the refrigeration circuit and the freezing circuit according to the target cold quantity distribution strategy, and controlling the on-off of the bypass pipeline according to the target cold quantity distribution strategy, so as to reuse the refrigeration evaporator in the refrigeration circuit as an auxiliary condenser of the freezing circuit through the bypass pipeline, or to supplement the cold quantity of the freezing circuit to the refrigeration circuit through the bypass pipeline, so as to distribute the cold quantity according to the actual demand of the refrigeration device.

[0006] Optionally, the calculating of the current refrigeration demand of the refrigeration device comprises: obtaining an operating mode set by a target object for the refrigeration device; in a case where the operating mode is a refrigeration priority mode, setting a refrigeration demand index as a preset maximum value as the refrigeration demand; in a case where the operating mode is an automatic mode, obtaining a current temperature, a set temperature, a current temperature change rate of a refrigeration chamber of the refrigeration device, and a switching frequency of a refrigeration chamber door, wherein the refrigeration circuit is used to provide cold quantity for the refrigeration chamber; calculating a temperature difference between the current temperature and the set temperature; obtaining preset weights of the temperature difference, the current temperature change rate and the switching frequency respectively, and calculating a weighted sum of the temperature difference, the current temperature change rate and the switching frequency to obtain the refrigeration demand index as the refrigeration demand.

[0007] Optionally, the calculating of the current freezing demand of the refrigeration device comprises: obtaining an operating mode set by a target object for the refrigeration device; in a case where the operating mode is a quick freezing mode, setting a freezing demand index as a preset maximum value as the freezing demand; in a case where the operating mode is an automatic mode, obtaining a current temperature, a set temperature, a current temperature change rate of a freezing chamber of the refrigeration device, and a switching frequency of a freezing chamber door, wherein the freezing circuit is used to provide cold quantity for the freezing chamber; calculating a temperature difference between the current temperature and the set temperature; obtaining preset weights of the temperature difference, the current temperature change rate and the switching frequency respectively, and calculating a weighted sum of the temperature difference, the current temperature change rate and the switching frequency to obtain the freezing demand index as the freezing demand.

[0008] Optionally, determining the target cold energy distribution strategy according to the refrigeration demand and the freezing demand comprises: in a case where the freezing demand is greater than or equal to a first preset threshold, determining the target cold energy distribution strategy as a freezing cold energy priority strategy, wherein the first preset threshold is a threshold set for the freezing demand; in a case where the refrigeration demand is greater than or equal to a second preset threshold, determining the target cold energy distribution strategy as a refrigeration cold energy priority strategy, wherein the second preset threshold is a threshold set for the refrigeration demand; in a case where the freezing demand is less than the first preset threshold and the refrigeration demand is less than the second preset threshold, determining the target cold energy distribution strategy as a variable-temperature chamber auxiliary strategy.

[0009] Optionally, the refrigeration circuit comprises a refrigeration compressor, a refrigeration condenser, a refrigeration electronic expansion valve, and a refrigeration evaporator, and a flow path of the refrigerant in the refrigeration circuit is through the refrigeration compressor, the refrigeration condenser, the refrigeration electronic expansion valve, and the refrigeration evaporator back to the refrigeration compressor; the freezing circuit comprises a freezing compressor, a freezing condenser, a freezing electronic expansion valve, and a freezing evaporator, and a flow path of the refrigerant in the freezing circuit is through the freezing compressor, the freezing condenser, the freezing electronic expansion valve, and the freezing evaporator back to the freezing compressor; the bypass pipeline comprises a first pipeline and a second pipeline, an inlet of the first pipeline is connected with the freezing evaporator, an outlet of the first pipeline is connected with the refrigeration evaporator, an inlet of the second pipeline is connected with the refrigeration evaporator, and an outlet of the second pipeline is arranged on the freezing circuit.

[0010] Optionally, controlling the operating states of the refrigeration circuit and the freezing circuit according to the target cold energy distribution strategy and controlling the opening and closing of the bypass pipeline according to the target cold energy distribution strategy comprises: in a case where the freezing demand is greater than or equal to a first preset threshold, the target cold energy distribution strategy is determined as a freezing cold energy priority strategy, the freezing circuit is opened, and the refrigeration circuit is closed, wherein the first preset threshold is a threshold set for the freezing demand; the operating frequency of the freezing compressor is increased from an initial frequency to a first target frequency, and the opening degree of the freezing electronic expansion valve is increased from an initial opening degree to a first target opening degree; the first pipeline and the second pipeline are opened, so that part of the refrigerant flowing out of the freezing evaporator flows into the refrigeration evaporator through the first pipeline to dissipate heat, and then flows back to the freezing circuit through the second pipeline to circulate.

[0011] Optionally, the controlling the operating states of the refrigeration circuit and the freezing circuit according to the target cold quantity distribution strategy and controlling the opening and closing of the bypass pipeline according to the target cold quantity distribution strategy further comprises: in a case where the refrigeration demand quantity is greater than or equal to the second preset threshold value, the target cold quantity distribution strategy is determined to be a refrigeration cold quantity priority strategy, the refrigeration circuit and the freezing circuit are started, the second preset threshold value is a threshold value set for the refrigeration demand, the operating frequency of the refrigeration compressor is increased from the initial frequency to the second target frequency, the operating frequency of the freezing compressor is reduced from the initial frequency to the third target frequency, the opening degree of the refrigeration electronic expansion valve is increased from the initial opening degree to the second target opening degree, and is greater than the opening degree of the freezing electronic expansion valve, and the first pipeline is started to enable part of the refrigerant flowing out of the freezing evaporator to flow into the refrigeration circuit through the first pipeline for circulation.

[0012] Optionally, the controlling the operating states of the refrigeration circuit and the freezing circuit according to the target cold quantity distribution strategy further comprises: in a case where the freezing demand quantity is less than the first preset threshold value and the refrigeration demand quantity is less than the second preset threshold value, the target cold quantity distribution strategy is determined to be a variable-temperature room auxiliary strategy, the freezing demand quantity and the refrigeration demand quantity are compared, in a case where the freezing demand quantity is greater than the refrigeration demand quantity, the variable-temperature room is connected to the freezing circuit, the freezing air duct is started, and the refrigeration air duct is stopped, the freezing air duct is used to assist in increasing the cold quantity of the freezing circuit through the fan, in a case where the freezing demand quantity is less than the refrigeration demand quantity, the variable-temperature room is connected to the refrigeration circuit, the refrigeration air duct is started, and the freezing air duct is stopped, and the opening degree of the refrigeration electronic expansion valve is increased, and the refrigeration air duct is used to assist in increasing the cold quantity of the refrigeration circuit through the fan.

[0013] Optionally, the method further comprises: obtaining model input parameters, wherein the model input parameters at least include an environment temperature, a preset freezing door influence factor, and a freezing load, and further include a current temperature of the freezing chamber, a set temperature of the freezing chamber, a current temperature of the refrigeration chamber, and a set temperature of the refrigeration chamber; inputting the model input parameters into a target prediction model to predict the temperatures of the freezing chamber and the refrigeration chamber after a preset time by using the target prediction model; obtaining a first temperature prediction value of the freezing chamber and a second temperature prediction value of the refrigeration chamber output by the target prediction model after the preset time; in a case where either the first temperature prediction value or the second temperature prediction value does not reach the corresponding set temperature, optimizing the operating states of the refrigeration circuit, the freezing circuit, and the bypass pipeline until the first temperature prediction value and the second temperature prediction value both reach the corresponding set temperatures.

[0014] According to another aspect of the embodiments of the present application, the present application provides a cold quantity distribution device, comprising: a demand calculation module, configured to calculate current refrigeration demand and freezing demand of a refrigeration device; a strategy determination module, configured to determine a target cold quantity distribution strategy according to the refrigeration demand and the freezing demand; and a cold quantity distribution module, configured to control running states of a refrigeration loop and a freezing loop respectively according to the target cold quantity distribution strategy, and control opening and closing of a bypass pipeline according to the target cold quantity distribution strategy, so as to reuse a refrigeration evaporator in the refrigeration loop as an auxiliary condenser of the freezing loop through the bypass pipeline, or to supplement cold quantity of the freezing loop to the refrigeration loop through the bypass pipeline, so as to distribute cold quantity according to actual demand of the refrigeration device.

[0015] According to another aspect of the embodiments of the present application, the present application provides a refrigeration device, comprising a memory, a processor, a communication interface and a communication bus, the memory stores a computer program capable of running on the processor, the memory, the processor and the communication interface communicate through the communication bus, and the processor implements steps of the above method when executing the computer program.

[0016] According to another aspect of the embodiments of the present application, the present application further provides a computer readable medium having non-volatile program codes executable by a processor, the program codes causing the processor to execute the above method.

[0017] The above technical solutions provided by the embodiments of the present application have the following advantages compared with related art:

[0018] The present application provides a cold quantity distribution method, applied to a refrigeration device equipped with a refrigeration loop and a freezing loop independent of each other, and a bypass pipeline is arranged between the refrigeration loop and the freezing loop, the method comprising: calculating current refrigeration demand and freezing demand of the refrigeration device; determining a target cold quantity distribution strategy according to the refrigeration demand and the freezing demand; controlling running states of the refrigeration loop and the freezing loop respectively according to the target cold quantity distribution strategy, and controlling opening and closing of the bypass pipeline according to the target cold quantity distribution strategy, so as to reuse a refrigeration evaporator in the refrigeration loop as an auxiliary condenser of the freezing loop through the bypass pipeline, or to supplement cold quantity of the freezing loop to the refrigeration loop through the bypass pipeline, so as to distribute cold quantity according to actual demand of the refrigeration device. The present application first quantifies cold quantity demand of each temperature zone by calculating real-time refrigeration demand and freezing demand, then determines a targeted cold quantity distribution strategy according to the demand, and finally dispatches cross-loop cold quantity by controlling running states of the independent refrigeration loop and the freezing loop, and adjusting opening and closing of the bypass pipeline between the two, so as to realize on-demand distribution of cold quantity, avoid temperature cross-talk of a single-cycle system, break through the rigid limitation of cold quantity distribution of a traditional double-cycle system, and solve the technical problem that existing refrigerators cannot adapt to real-time demand of each temperature zone in cold quantity distribution. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated into and form a part of the specification, illustrate preferred embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the accompanying drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0021] Figure 1 An application system schematic diagram of an optional cold distribution method according to the embodiments of the present application is shown in FIG. 1.

[0022] Figure 2 A flowchart of an optional cold distribution method according to the embodiments of the present application is shown in FIG. 2.

[0023] Figure 3 An optional demand calculation schematic diagram according to the embodiments of the present application is shown in FIG. 3.

[0024] Figure 4 An optional strategy judgment schematic diagram according to the embodiments of the present application is shown in FIG. 4.

[0025] Figure 5 A block diagram of an optional cold distribution device according to the embodiments of the present application is shown in FIG. 5.

[0026] Figure 6 An optional refrigeration equipment structure schematic diagram according to the embodiments of the present application is shown in FIG. 6. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort fall within the scope of protection of the present application.

[0028] In the subsequent description, the suffixes such as "module", "part" or "unit" used to represent elements are only for the convenience of the description of the present application, and they do not have specific meanings. Therefore, "module" and "part" can be used interchangeably.

[0029] In order to solve the problems mentioned in the background art, according to an aspect of the embodiments of the present application, an embodiment of a cold distribution method is provided.

[0030] Optionally, the cold distribution method described above can be applied to the system as shown in Figure 1 The refrigeration circuit and the freezing circuit of the refrigeration device are shown in Figure 1 The refrigeration circuit includes a refrigeration compressor 1, a refrigeration condenser 2, a refrigeration electronic expansion valve 3, and a refrigeration evaporator 4. The flow path of the refrigerant in the refrigeration circuit is through the refrigeration compressor 1, the refrigeration condenser 2, the refrigeration electronic expansion valve 3, and the refrigeration evaporator 4, and back to the refrigeration compressor 1. Correspondingly, the freezing circuit includes a freezing compressor, a freezing condenser, a freezing electronic expansion valve, and a freezing evaporator. The flow path of the refrigerant in the freezing circuit is through the freezing compressor, the freezing condenser, the freezing electronic expansion valve, and the freezing evaporator, and back to the freezing compressor. A bypass pipeline is provided between the refrigeration circuit and the freezing circuit. The bypass pipeline includes a first pipeline and a second pipeline. The inlet of the first pipeline is connected to the freezing evaporator, the outlet of the first pipeline is connected to the refrigeration evaporator, the inlet of the second pipeline is connected to the refrigeration evaporator, and the outlet of the second pipeline is provided on the freezing circuit. The bypass pipeline can realize cold sharing between the refrigeration circuit and the freezing circuit.

[0031] A cold distribution method in an embodiment of the present application can be executed by a controller of the refrigeration device. As shown in Figure 2 The method can include the following steps:

[0032] Step S202, calculating the refrigeration demand and the freezing demand of the refrigeration device at present;

[0033] Step S204, determining a target cold distribution strategy according to the refrigeration demand and the freezing demand;

[0034] Step S206, controlling the operating states of the refrigeration circuit, the freezing circuit, and the bypass pipeline according to the target cold distribution strategy, so as to distribute the cold according to the actual demand of the refrigeration device.

[0035] In the embodiments of the present application, the refrigeration circuit refers to an independent refrigeration circuit in the refrigeration device for providing cold quantity for the refrigeration chamber, and at least includes a refrigeration compressor, a refrigeration condenser, a refrigeration electronic expansion valve (EEV), and a refrigeration evaporator. The refrigerant circulates in the circuit to realize heat exchange, thereby maintaining a set low temperature environment for the refrigeration chamber. The freezing circuit refers to an independent refrigeration circuit in the refrigeration device for providing cold quantity for the freezing chamber, and has a structure similar to the refrigeration circuit, including a freezing compressor, a freezing condenser, a freezing electronic expansion valve (EEV), and a freezing evaporator, which are used to maintain a low temperature for the freezing chamber, usually below 0℃. The bypass pipeline is an auxiliary pipeline connecting the refrigeration circuit and the freezing circuit, which is controlled by a solenoid valve to open and close, and is used to realize the cold quantity scheduling between the two circuits, and can make the refrigeration evaporator switchable to an auxiliary condenser or allow the freezing circuit to supplement cold quantity to the refrigeration circuit. The refrigeration demand quantity is a parameter quantifying the current demand degree of cold quantity for the refrigeration chamber, which is calculated based on the refrigeration chamber temperature deviation, temperature change trend, door opening and closing frequency and other factors. The larger the value, the higher the refrigeration demand. The freezing demand quantity is a parameter quantifying the current demand degree of cold quantity for the freezing chamber, and the calculation logic is similar to the refrigeration demand quantity, which is determined based on the temperature related parameters of the freezing chamber and the door opening and closing frequency. The target cold quantity distribution strategy is a cold quantity scheduling scheme determined according to the refrigeration demand quantity and the freezing demand quantity, including a freezing cold quantity priority strategy, a refrigeration cold quantity priority strategy, a variable temperature chamber auxiliary strategy, etc., which is used to guide the operation state control of each circuit and the bypass pipeline.

[0036] In the embodiments of the present application, the controller of the refrigeration device first starts the demand quantity calculation process, and real-time collects the current temperature of each temperature zone through the temperature sensors deployed in the refrigeration chamber and the freezing chamber, and retrieves the set temperature set by the user in advance, such as setting the refrigeration chamber to 4℃ and the freezing chamber to -25℃. At the same time, the opening and closing frequency of the refrigeration chamber door and the freezing chamber door is recorded through the door sensor (unit: times / hour), and the current temperature change rate of each temperature zone is calculated through the historical data of the temperature sensor (unit: ℃ / h, if the temperature shows a downward trend, it is negative, and if the temperature shows an upward trend, it is positive). The controller calculates the refrigeration demand quantity and the freezing demand quantity based on the above collected parameters, wherein the demand quantity is quantified in the form of demand index, and the value range of the demand index can be set to 0-100, 0 represents no cold quantity demand, and 100 represents maximum cold quantity demand, which can also be set according to actual needs. The calculation logic of the demand index is temperature deviation x weight 1 + temperature change rate x weight 2 + door opening and closing frequency x weight 3, and the weight 1, weight 2 and weight 3 can be calibrated by experiments to ensure that the influence of each factor on the demand is reasonable, and can also be set according to actual needs.

[0037] In the embodiments of the present application, the controller has a built-in demand threshold judgment rule, and the freezing demand quantity and the refrigeration demand quantity are substituted into the demand threshold judgment rule, so that the suitable target cold quantity distribution strategy can be determined according to the demand threshold judgment rule. The controller sends control instructions to the execution components of each circuit according to the determined target strategy, thereby controlling the cold quantity.

[0038] Through steps S202 to S206, the application first quantifies the cold quantity demand of each temperature zone by calculating the refrigeration and freezing real-time demand, then determines the targeted cold quantity distribution strategy according to the demand, and finally dispatches the cross-loop cold quantity by controlling the running state of the independent refrigeration loop and freezing loop and adjusting the on-off of the bypass pipeline, so as to realize the on-demand distribution of cold quantity, avoid the temperature cross-talk of the single-loop system, break through the rigid limitation of the cold quantity distribution of the traditional double-loop system, and solve the technical problem that the existing refrigerator cannot adapt to the real-time demand of each temperature zone in the cold quantity distribution.

[0039] As shown in Figure 3 The application can comprehensively calculate the refrigeration demand and the freezing demand according to the temperature data detected by the temperature sensor, the door switch frequency and the user-set mode. The calculation of the refrigeration demand and the freezing demand is described below.

[0040] In an optional embodiment, calculating the current refrigeration demand of the refrigeration device includes:

[0041] Step 1, obtaining the running mode of the refrigeration device set by the target object;

[0042] Step 2a, in the case that the running mode is the refrigeration priority mode, setting the refrigeration demand index as a preset maximum value as the refrigeration demand;

[0043] Step 2b, in the case that the running mode is the automatic mode, obtaining the current temperature, the set temperature, the current temperature change rate of the refrigeration chamber of the refrigeration device and the opening and closing frequency of the refrigeration chamber door, wherein the refrigeration loop is used to provide cold quantity for the refrigeration chamber;

[0044] Step 3, calculating the temperature difference between the current temperature and the set temperature;

[0045] Step 4, obtaining the preset weight of the temperature difference, the current temperature change rate and the opening and closing frequency respectively, and calculating the weighted sum of the temperature difference, the current temperature change rate and the opening and closing frequency to obtain the refrigeration demand index as the refrigeration demand.

[0046] In the embodiment of the application, the refrigeration priority mode is a user-set running mode of the refrigeration device, which is suitable for the scene that the refrigeration chamber needs rapid cooling or maintains high refrigeration demand. At this time, the system prioritizes the supply of cold quantity for the refrigeration chamber and sets the refrigeration demand to the highest level. The automatic mode is the default running mode of the refrigeration device. The system does not need user intervention and automatically calculates the refrigeration demand according to the actual working condition of the refrigeration chamber to dynamically adjust the cold quantity supply and balance the temperature control accuracy and energy efficiency. The refrigeration demand index is a core parameter for quantifying the cold quantity demand of the refrigeration chamber, with a value range of 0-100. The higher the index, the more urgent the demand for cold quantity of the refrigeration chamber, which is one of the key bases for determining the cold quantity distribution strategy.

[0047] In the embodiments of the present application, the man-machine interface of the refrigeration equipment, such as the control panel, the mobile phone APP, etc., supports the user to set the operation mode, including the refrigeration priority mode, the quick freezing mode, the automatic mode, the energy saving mode, etc. The controller determines the current operation mode by reading the instructions of the man-machine interaction module. When the controller identifies that the operation mode is the refrigeration priority mode, the refrigeration demand index is directly set to the preset maximum value, and this is used as the refrigeration demand. Since the core demand of the refrigeration priority mode is to preferentially guarantee the cold capacity of the refrigeration chamber, at this time, there is no need to calculate the working condition parameters complicatedly, and directly setting the highest demand can ensure that the system inclines the cold capacity resources to the refrigeration chamber, such as increasing the refrigeration compressor frequency, increasing the refrigeration EEV opening degree, and sharing the cold capacity of the freezing circuit to the refrigeration circuit, etc., to quickly respond to the high cold capacity demand of the refrigeration chamber. When the operation mode is the automatic mode, the refrigeration demand is obtained through multi-parameter acquisition and weighted calculation. Specifically, the controller acquires the current temperature of the refrigeration chamber, the set temperature of the refrigeration chamber, the current temperature change rate of the refrigeration chamber, and the refrigeration chamber door opening and closing frequency through the built-in sensors and storage modules of the equipment. The time range for calculating the temperature change rate and the door opening and closing frequency can be set according to actual needs. The temperature difference between the current temperature and the set temperature is calculated, which directly reflects the cold capacity gap of the refrigeration chamber. The larger the temperature difference, the farther the current temperature of the refrigeration chamber deviates from the set value, and the more cold capacity needs to be supplemented. The controller has a pre-set weight calibrated by experiments, for example, since the temperature difference is the core factor of the cold capacity demand, the weight is the highest, and therefore the temperature difference weight can be set to 0.5; since the change rate reflects the demand trend, such as the temperature rising fast, the cold capacity needs to be increased in advance, and therefore the current temperature change rate weight can be set to 0.3; since the heat load introduced by the door opening and closing directly increases the cold capacity demand, the weight is the second, and therefore the door opening and closing frequency weight can be set to 0.2. The weighted sum of the temperature difference, the current temperature change rate, and the door opening and closing frequency is calculated, and then the result of the weighted sum is normalized, that is, the calculated value is mapped to the range of 0-100. The normalized refrigeration demand index is the final refrigeration demand.

[0048] The present application directly sets the highest demand for the refrigeration priority mode, quickly responds to the emergency refrigeration demand of the user, improves the user experience, and balances the influence of each factor through the pre-set weight in the automatic mode, thereby avoiding the demand misjudgment caused by a single parameter.

[0049] In an optional embodiment, calculating the current freezing demand of the refrigeration equipment includes:

[0050] Step 1, obtaining the operation mode set by the target object to the refrigeration equipment;

[0051] Step 2a, in the case that the operation mode is the quick freezing mode, setting the freezing demand index to the preset maximum value as the freezing demand;

[0052] Step 2b, in the case of the running mode being an automatic mode, acquiring a current temperature, a set temperature, a current temperature change rate of a freezing chamber of the refrigeration equipment, and an opening and closing frequency of a freezing chamber door, wherein the freezing circuit is used to provide cold energy to the freezing chamber;

[0053] Step 3, calculating a temperature difference between the current temperature and the set temperature;

[0054] Step 4, acquiring preset weights of the temperature difference, the current temperature change rate, and the opening and closing frequency respectively, and calculating a weighted sum of the temperature difference, the current temperature change rate, and the opening and closing frequency to obtain a freezing demand index as the freezing demand.

[0055] In the embodiments of the present application, the quick-freezing mode is a user-set running mode of the refrigeration equipment, which is suitable for a scenario in which the freezing chamber needs to be quickly cooled to a temperature of-18℃ or lower to freeze food materials, at this time, the system needs to preferentially guarantee the maximum cold energy supply of the freezing chamber, and the freezing demand is set to the highest level. The automatic mode is a default running mode of the refrigeration equipment, the system does not need user intervention, and automatically calculates the freezing demand according to the actual working condition of the freezing chamber, dynamically adjusts the cold energy supply, and balances the temperature control precision and energy efficiency. The freezing demand index is a core parameter for quantifying the cold energy demand of the freezing chamber, the value range is 0-100, the higher the index, the more urgent the demand for cold energy of the freezing chamber, and it is one of the key bases for determining the cold energy distribution strategy.

[0056] In the embodiments of the present application, the man-machine interface of the refrigeration equipment, such as the control panel, the mobile phone APP, etc., supports the user to set the operation mode, including the refrigeration priority mode, the quick freezing mode, the automatic mode, the energy saving mode, etc. The controller determines the current operation mode by reading the instructions of the man-machine interaction module. When the controller identifies that the operation mode is the quick freezing mode, the freezing demand index is directly set to the preset maximum value, and the freezing demand is taken as the freezing demand. Since the core goal of the quick freezing mode is to quickly freeze food, the maximum cooling capacity needs to be provided by the freezing chamber in a short time, at this time, there is no need to calculate complex working condition parameters, and setting the highest demand can force the system to tilt the cooling capacity resources to the freezing chamber, such as increasing the frequency of the freezing compressor, increasing the opening degree of the freezing EEV, and converting the refrigeration evaporator into a condenser through the bypass pipeline to improve the heat dissipation effect of the refrigerant of the freezing circuit, and to ensure the quick freezing effect. When the operation mode is the automatic mode, the freezing demand needs to be calculated through multi-parameter acquisition and weighted calculation. Specifically, the controller acquires the current temperature of the freezing chamber, the set temperature of the freezing chamber, the current temperature change rate of the freezing chamber, and the freezing chamber door opening and closing frequency through the built-in sensors and storage modules of the equipment. The time range for calculating the temperature change rate and the door opening and closing frequency can be set according to actual needs. The temperature difference between the current temperature and the set temperature is calculated, which directly reflects the cooling capacity gap of the freezing chamber. The larger the temperature difference, the farther the current temperature of the freezing chamber deviates from the set value, and the more cooling capacity needs to be supplemented. The controller has a preset weight calibrated by experiments, for example, since the temperature difference is the core factor of cooling demand, the weight is the highest, and therefore the temperature difference weight can be set to 0.5; since the change rate reflects the demand trend, such as the temperature rising fast, the cooling capacity needs to be increased in advance, and therefore the current temperature change rate weight can be set to 0.3; since the heat load introduced by the door opening and closing directly increases the cooling demand, the weight is the second, and therefore the door opening and closing frequency weight can be set to 0.2. The weighted sum of the temperature difference, the current temperature change rate and the door opening and closing frequency is calculated, and the result of the weighted sum is normalized, that is, the calculated value is mapped to the range of 0-100. The normalized freezing demand index is the final freezing demand.

[0057] The present application directly sets the highest demand for the quick freezing mode, quickly responds to the emergency freezing demand of the user, improves the user experience, and balances the influence of each factor through the preset weight in the automatic mode to avoid demand misjudgment caused by a single parameter.

[0058] In an optional embodiment, determining the target cooling capacity distribution strategy according to the refrigeration demand and the freezing demand includes:

[0059] In the case that the freezing demand is greater than or equal to a first preset threshold, the target cooling capacity distribution strategy is determined as the freezing cooling capacity priority strategy, wherein the first preset threshold is a threshold set for the freezing demand;

[0060] In a case where the refrigeration demand is greater than or equal to a second preset threshold, the target cold quantity distribution strategy is determined as a refrigeration cold quantity priority strategy, wherein the second preset threshold is a threshold set for the refrigeration demand;

[0061] In a case where the freezing demand is less than the first preset threshold and the refrigeration demand is less than the second preset threshold, the target cold quantity distribution strategy is determined as a variable temperature chamber auxiliary strategy.

[0062] In the embodiments of the present application, the first preset threshold is a judgment threshold set for the freezing demand, and has a value range of 0-100, such as 80, for triggering the freezing cold quantity priority strategy. When the freezing demand is greater than or equal to the first preset threshold, it indicates that there is a high cold quantity demand in the freezing chamber, and the freezing cold quantity supply needs to be prioritized. The second preset threshold is a judgment threshold set for the refrigeration demand, and has a value range of 0-100, such as 70, for triggering the refrigeration cold quantity priority strategy. When the refrigeration demand is greater than or equal to the second preset threshold, it indicates that there is a high cold quantity demand in the refrigeration chamber, and the refrigeration cold quantity supply needs to be prioritized. The core of the freezing cold quantity priority strategy is to prioritize the cold quantity demand of the freezing chamber, and to supply cold quantity resources to the freezing chamber by closing the refrigeration circuit, increasing the freezing circuit load, and opening the bypass pipeline. The core of the refrigeration cold quantity priority strategy is to prioritize the cold quantity demand of the refrigeration chamber, and to ensure the cold quantity supply of the refrigeration chamber by increasing the refrigeration circuit load, reducing the freezing circuit basic load, and opening the bypass pipeline to supplement the cold quantity. The variable temperature chamber auxiliary strategy is suitable for the normal scene where the freezing demand and the refrigeration demand are both less than the corresponding threshold. By connecting the variable temperature chamber to the temperature zone circuit with higher demand, the variable temperature chamber auxiliary strategy can assist in temperature control of the temperature zone and balance the system load.

[0063] In the embodiments of the present application, as shown in FIG. 1, Figure 4 As shown in FIG. 1, the controller can determine the most suitable operation mode of the refrigeration equipment according to the refrigeration demand index, the freezing demand index, i.e., the refrigeration demand and the freezing demand, and then determine the best target cold quantity distribution strategy under the corresponding operation mode. Specifically, the target cold quantity distribution strategy can be determined according to the variable temperature demand identifier. The variable temperature demand identifier includes -1, representing high freezing demand, 0, representing normal demand, and 1, representing high refrigeration demand. In a case where the freezing demand is greater than or equal to the first preset threshold, it is determined that the most suitable operation mode of the refrigeration equipment is the quick freezing mode, and therefore the variable temperature demand identifier is output as -1, and the target cold quantity distribution strategy is determined as the freezing cold quantity priority strategy. In a case where the refrigeration demand is greater than or equal to the second preset threshold, it is determined that the most suitable operation mode of the refrigeration equipment is the refrigeration priority mode, and therefore the variable temperature demand identifier is output as 1, and the target cold quantity distribution strategy is determined as the refrigeration cold quantity priority strategy. In a case where the freezing demand is less than the first preset threshold and the refrigeration demand is less than the second preset threshold, it is determined that the most suitable operation mode of the refrigeration equipment is the normal mode, i.e., the refrigeration circuit and the freezing circuit operate independently, and therefore the variable temperature demand identifier is output as 0, and the target cold quantity distribution strategy is determined as the variable temperature chamber auxiliary strategy.

[0064] In an optional embodiment, the refrigeration circuit comprises a refrigeration compressor, a refrigeration condenser, a refrigeration electronic expansion valve, a refrigeration evaporator, and a refrigerant flows through the refrigeration circuit in a path from the refrigeration compressor, the refrigeration condenser, the refrigeration electronic expansion valve, the refrigeration evaporator, and back to the refrigeration compressor; the freezing circuit comprises a freezing compressor, a freezing condenser, a freezing electronic expansion valve, a freezing evaporator, and a refrigerant flows through the freezing circuit in a path from the freezing compressor, the freezing condenser, the freezing electronic expansion valve, the freezing evaporator, and back to the freezing compressor; the bypass circuit comprises a first pipe and a second pipe, an inlet of the first pipe is connected with the freezing evaporator, an outlet of the first pipe is connected with the refrigeration evaporator, an inlet of the second pipe is connected with the refrigeration evaporator, and an outlet of the second pipe is arranged on the freezing circuit.

[0065] In the embodiments of the present application, the refrigeration compressor is the power core of the refrigeration circuit, used to compress the low-temperature and low-pressure gaseous refrigerant flowing out of the refrigeration evaporator into high-temperature and high-pressure gaseous refrigerant, to provide power for the refrigeration circuit. The refrigeration condenser is a heat dissipation component of the refrigeration circuit, used to cool the high-temperature and high-pressure gaseous refrigerant discharged by the refrigeration compressor into normal-temperature and high-pressure liquid refrigerant, and dissipate heat through air or water. The refrigeration electronic expansion valve is a flow control component of the refrigeration circuit, which controls the flow of liquid refrigerant flowing into the refrigeration evaporator by adjusting the valve opening, and further adjusts the cold output of the refrigeration circuit. The larger the opening, the greater the flow, and the higher the cold output. The refrigeration evaporator is a heat absorption component of the refrigeration circuit, used to evaporate the low-temperature and low-pressure liquid refrigerant flowing out of the refrigeration electronic expansion valve into low-temperature and low-pressure gaseous refrigerant, and absorb the heat of the refrigeration chamber during the process, to achieve refrigeration chamber cooling. The first pipeline is a component of the bypass pipeline, the inlet is connected with the freezer evaporator, and the outlet is connected with the refrigeration evaporator, used to transport part of the refrigerant flowing out of the freezer evaporator to the refrigeration evaporator. In the quick freezing mode, the refrigerant enters the refrigeration evaporator to dissipate heat through the first pipeline. The second pipeline is a component of the bypass pipeline, the inlet is connected with the refrigeration evaporator, and the outlet is arranged on the freezer circuit, such as before the inlet of the freezer compressor, used to return the refrigerant flowing out of the refrigeration evaporator to the freezer circuit, to complete the cross-circuit circulation. The refrigerant of the refrigeration circuit can use environmentally friendly refrigerant R600a, which has the characteristics of low GWP value and high refrigeration efficiency. The refrigerant of the refrigeration circuit circulates along the fixed path of refrigeration compressor→refrigeration condenser→refrigeration electronic expansion valve (EEV)→refrigeration evaporator→refrigeration compressor, to achieve refrigeration chamber cooling. Specifically, the refrigeration compressor compresses the low-temperature and low-pressure gaseous R600a flowing out of the refrigeration evaporator into high-temperature and high-pressure gaseous R600a, the high-temperature and high-pressure gaseous R600a flows into the refrigeration condenser, and is cooled into normal-temperature and high-pressure liquid R600a under the heat dissipation of the fan, the normal-temperature and high-pressure liquid R600a flows into the refrigeration electronic expansion valve, and is throttled and decompressed by the valve opening to become low-temperature and low-pressure liquid R600a, the low-temperature and low-pressure liquid R600a flows into the refrigeration evaporator, absorbs the heat of the refrigeration chamber, and evaporates into low-temperature and low-pressure gaseous R600a, the low-temperature and low-pressure gaseous R600a returns to the refrigeration compressor, to complete a cycle and continuously supply cold to the refrigeration chamber.

[0066] In the embodiments of the present application, the structure of the freezer circuit is symmetrical to that of the refrigeration circuit, and the freezer circuit can also use R600a as the refrigerant, and the flow path is similar to that of the refrigeration circuit, which will not be described here.

[0067] In the present application, the refrigeration and freezer circuits are completely independent, that is, each has a dedicated compressor, EEV, evaporator, etc., which completely eliminates the temperature cross-talk of the traditional single-circuit system from the hardware, and provides the possibility for independent and precise temperature control of multiple temperature zones. At the same time, the design of the bypass pipeline breaks through the limitation of the isolated circuit of the traditional double-circuit system, so that the cold can be flexibly dispatched between the two circuits.

[0068] The refrigeration cold quantity priority strategy, the freezing cold quantity priority strategy and the auxiliary strategy of the variable temperature chamber are described below respectively.

[0069] In an optional embodiment, the operating states of the refrigeration circuit and the freezing circuit are controlled according to the target cold quantity distribution strategy respectively, and the opening and closing of the bypass pipeline is controlled according to the target cold quantity distribution strategy, which comprises:

[0070] Step 1, in the case that the target cold quantity distribution strategy is the freezing cold quantity priority strategy based on the freezing demand quantity being greater than or equal to a first preset threshold, the freezing circuit is started and the refrigeration circuit is stopped, wherein the first preset threshold is a threshold set for the freezing demand;

[0071] Step 2, the operating frequency of the freezing compressor is increased from an initial frequency to a first target frequency, and the opening degree of the freezing electronic expansion valve is increased from an initial opening degree to a first target opening degree;

[0072] Step 3, the first pipeline and the second pipeline are started, so that part of the refrigerant flowing out of the freezing evaporator flows into the refrigeration evaporator through the first pipeline to dissipate heat, and then flows back to the freezing circuit through the second pipeline to circulate.

[0073] In the embodiment of the application, the first preset threshold is a judgment threshold set for the freezing demand quantity, and the value range is 0-100, such as 80, which is used to trigger the freezing cold quantity priority strategy. When the freezing demand quantity is greater than or equal to the first preset threshold, it indicates that there is a high cold quantity demand in the freezing chamber, and the freezing cold quantity supply needs to be prioritized. The core of the freezing cold quantity priority strategy is to prioritize the cold quantity demand of the freezing chamber, and the cold quantity resources are concentrated to supply the freezing chamber by closing the refrigeration circuit, increasing the load of the freezing circuit, starting the bypass pipeline and the like. The initial frequency is the default operating frequency of the freezing compressor in the normal mode, at which time the freezing circuit outputs the basic cold quantity to maintain the normal temperature of the freezing chamber. The first target frequency is the target operating frequency of the freezing compressor under the freezing cold quantity priority strategy, which can be the maximum frequency, at which time the freezing compressor runs at full load and outputs the maximum cold quantity. The initial opening degree is the default opening degree of the freezing electronic expansion valve in the normal mode, and the default opening degree ranges from 30% to 50%, at which time the refrigerant flow is adapted to the basic cold quantity demand. The first target opening degree is the target opening degree of the freezing electronic expansion valve under the freezing cold quantity priority strategy, such as 70%, at which time the refrigerant flow is increased to adapt to the cold quantity output demand of the freezing compressor running at full load.

[0074] In the embodiment of the present application, when the controller determines that the target strategy is the refrigeration cold quantity priority strategy, a stop command is sent to the refrigeration compressor to stop the operation of the refrigeration compressor and no longer consume electric energy to generate refrigeration cold quantity, and an opening degree adjustment to 0% command is sent to the refrigeration electronic expansion valve to make the refrigeration circuit not flow through, so as to ensure that the refrigerant coming out of the freezing evaporator only flows through the first pipeline, passes through the refrigeration evaporator, and then returns to the freezing circuit through the second pipeline to participate in circulation. At the same time, the controller also sends a start command to the refrigeration compressor and sends an opening and opening degree adjustment command to the refrigeration electronic expansion valve to ensure that the refrigeration circuit flows through. The controller gradually increases the operating frequency of the refrigeration compressor from the initial frequency to the first target frequency, such as the maximum frequency, through the variable frequency drive module, and maintains the maximum frequency when the frequency reaches the maximum frequency. At this time, the refrigeration compressor is in full load output, and the refrigerant compression efficiency is the highest, so as to provide the maximum cold quantity for the freezing chamber. The controller synchronously adjusts the opening degree of the refrigeration electronic expansion valve from the initial opening degree to the first target opening degree to ensure that the refrigerant flow rate matches the compressor frequency, and maintains the first target opening degree when the opening degree reaches the first target opening degree. At this time, the refrigerant flow rate flowing into the freezing evaporator increases to ensure that the freezing evaporator can generate more cold quantity. The controller sends an opening command to the electromagnetic valve controlling the first pipeline and the electromagnetic valve controlling the second pipeline to make the refrigerant of the freezing circuit flow through the refrigeration evaporator, and utilize the refrigeration evaporator to assist heat dissipation, so as to further improve the refrigeration cold quantity output. At this time, the cross-circuit circulation path of part of the refrigerant is: the refrigeration compressor→the refrigeration condenser→the refrigeration electronic expansion valve→the refrigeration evaporator→the first pipeline→the refrigeration evaporator→the second pipeline→the refrigeration compressor. Due to the increase of the opening degree of the refrigeration electronic expansion valve, the over liquid volume of the refrigerant in the refrigeration evaporator increases, and the refrigerant is not completely evaporated in the refrigeration evaporator, and flows out in a medium temperature and medium pressure gas-liquid two-phase state (the pressure is about 0.5 MPa, and the temperature is about 5℃, and the low temperature and low pressure gas state in the conventional mode). The gas-liquid two-phase state refrigerant flows into the refrigeration evaporator through the first pipeline. At this time, the air temperature around the refrigeration evaporator (because the refrigeration compressor is turned off, the temperature of the refrigeration chamber slowly rises, but is still lower than 5℃, such as 3℃) is lower than the saturation temperature (5℃) of the refrigerant, the refrigerant is condensed and heat is released in the refrigeration evaporator, and the heat is transferred to the air in the refrigeration chamber. The condensed refrigerant returns to the refrigeration compressor inlet through the second pipeline, reenters the refrigeration circuit, and completes the cross-circuit process of the refrigeration circuit refrigerant→the refrigeration evaporator heat dissipation→the return to the refrigeration circuit. In the process, the refrigeration evaporator becomes a condenser for assisting the refrigeration circuit in heat dissipation, improves the refrigeration capacity in the refrigeration chamber, and also avoids the overcooling of the refrigeration chamber.

[0075] In the embodiment of the present application, when the refrigeration evaporator becomes a condenser, the passage from the refrigeration evaporator to the refrigeration compressor can be closed to avoid the return of liquid refrigerant to the refrigeration compressor and cause damage to the refrigeration compressor.

[0076] The application utilizes the heat dissipation capacity of the refrigeration evaporator, reuses the refrigeration evaporator as an auxiliary condenser through a bypass pipeline, and indirectly improves the refrigeration efficiency without additional heat dissipation components.

[0077] In an optional embodiment, the on-off of the bypass pipeline is controlled according to the target cold quantity distribution strategy, and the operation state of the refrigeration circuit and the freezing circuit is controlled according to the target cold quantity distribution strategy, and the on-off of the bypass pipeline according to the target cold quantity distribution strategy further comprises:

[0078] Step 1, in the case that the target cold quantity distribution strategy is the refrigeration cold quantity priority strategy based on the refrigeration demand being greater than or equal to a second preset threshold, the refrigeration circuit and the freezing circuit are started, wherein the second preset threshold is a threshold set for the refrigeration demand;

[0079] Step 2, the operating frequency of the refrigeration compressor is increased from the initial frequency to the second target frequency, the operating frequency of the freezing compressor is reduced from the initial frequency to the third target frequency, the opening degree of the refrigeration electronic expansion valve is increased from the initial opening degree to the second target opening degree, and is greater than the opening degree of the freezing electronic expansion valve;

[0080] Step 3, the first pipeline is started, and part of the refrigerant flowing out of the freezing evaporator flows into the refrigeration circuit through the first pipeline for circulation.

[0081] In the embodiment of the application, the second preset threshold is a judgment threshold set for the refrigeration demand, and the value range is 0-100, such as 70, which is used to trigger the refrigeration cold quantity priority strategy. When the refrigeration demand is greater than or equal to the second preset threshold, it indicates that there is a high cold quantity demand in the refrigeration chamber, and the refrigeration cold quantity supply needs to be prioritized. The core of the refrigeration cold quantity priority strategy is to prioritize the refrigeration chamber cold quantity demand, and to ensure the refrigeration chamber cold quantity supply through the ways of increasing the refrigeration circuit load, reducing the freezing circuit basic load, and starting the bypass pipeline to supplement the cold quantity. The second target frequency is the target operating frequency of the refrigeration compressor under the refrigeration cold quantity priority strategy, at this time the refrigeration compressor is close to full load or full load operation, and outputs the maximum refrigeration cold quantity. The third target frequency is the target operating frequency of the freezing compressor under the refrigeration cold quantity priority strategy, at this time the freezing compressor is running at a reduced frequency, and only outputs the basic cold quantity to maintain the normal temperature of the freezing chamber. The second target opening degree is the target opening degree of the refrigeration electronic expansion valve under the refrigeration cold quantity priority strategy, at this time the refrigerant flow is increased to adapt to the cold quantity output demand of the high frequency operation of the refrigeration compressor.

[0082] In the embodiments of the present application, when the controller determines that the target strategy is the refrigeration cold quantity priority strategy, a frequency reduction instruction is sent to the refrigeration compressor, and an open and maintain small opening degree instruction is sent to the refrigeration electronic expansion valve, so as to ensure that the refrigeration circuit does not stop running, but only outputs basic cold quantity. At the same time, the controller also sends a start instruction to the refrigeration compressor and an open and adjust opening degree instruction to the refrigeration electronic expansion valve, so as to ensure that the refrigeration circuit flows. The controller gradually increases the operating frequency of the refrigeration compressor from the initial frequency to the second target frequency through the variable frequency drive module, and maintains the second target frequency when the frequency reaches the second target frequency, so as to increase the cold quantity provided for the refrigeration chamber. The controller synchronously adjusts the opening degree of the refrigeration electronic expansion valve from the initial opening degree to the second target opening degree, so as to ensure that the refrigerant flow matches the compressor frequency, and maintains the second target opening degree when the opening degree reaches the second target opening degree, so that the refrigerant flow into the refrigeration evaporator increases, and the refrigeration evaporator can generate more cold quantity. The controller also sends an open instruction to the electromagnetic valve controlling the first pipeline and a close instruction to the electromagnetic valve controlling the second pipeline, so that part of the refrigerant of the refrigeration circuit flows into the refrigeration circuit to participate in the refrigerant circulation of the refrigeration circuit and supplement the refrigeration cold quantity. At this time, the flow path of the part of the refrigerant of the refrigeration circuit is: the refrigeration evaporator→the first pipeline→the refrigeration evaporator→the refrigeration compressor→the refrigeration condenser→the refrigeration electronic expansion valve→the refrigeration evaporator. The low-temperature and low-pressure gaseous refrigerant flowing out of the refrigeration evaporator flows into the refrigeration evaporator through the first pipeline, mixes with the refrigerant of the refrigeration circuit, and absorbs the heat of the refrigeration chamber together, and the low-temperature characteristics of the refrigeration refrigerant can further reduce the temperature of the refrigeration evaporator and improve the heat absorption efficiency of the refrigeration evaporator, so as to increase the cold quantity output of the refrigeration circuit.

[0083] The present application uses the surplus cold quantity of the refrigeration circuit to supplement the refrigeration cold quantity through the bypass pipeline, without additional consumption of electric energy to generate cold quantity, and improves the overall energy efficiency of the system.

[0084] In the embodiments of the present application, during the execution of the refrigeration cold quantity priority strategy and the refrigeration cold quantity priority strategy, the pressure difference between the two sides of the evaporator can be detected before the first pipeline and / or the second pipeline is opened. If the pressure difference is greater than a threshold value, the opening is delayed. Specifically:

[0085] Step 1, when the first pipeline and / or the second pipeline needs to be opened to realize the cold quantity scheduling between the refrigeration circuit and the refrigeration circuit, the current pressure value of the refrigeration evaporator and the current pressure value of the refrigeration evaporator are obtained.

[0086] Step 2, the pressure difference between the current pressure value of the refrigeration evaporator and the current pressure value of the refrigeration evaporator is calculated.

[0087] Step 3, compare the pressure difference with a preset pressure threshold value.

[0088] Step 4a, if the pressure difference is greater than the preset pressure threshold, delaying opening the first pipeline and / or the second pipeline, and continuously monitoring the pressure difference;

[0089] Step 4b, if the pressure difference is less than or equal to the preset pressure threshold, opening the first pipeline and / or the second pipeline to allow refrigerant to flow between the refrigeration circuit and the freezing circuit through the bypass pipeline.

[0090] The application prevents the opening of the bypass pipeline when the pressure difference between the refrigeration evaporator and the freezing evaporator is too large, which causes the refrigerant flow rate to suddenly increase, the pipeline to vibrate, or the compressor to be liquid-impinged, thereby protecting the core components of the equipment.

[0091] In the embodiment of the application, when the refrigeration evaporator is used as a condenser, an overheating protection mechanism can also be added, that is, a temperature threshold is set, and when the temperature of the refrigeration evaporator is greater than the temperature threshold, the overheating protection is triggered, and the frequency of the compressor is reduced. Specifically:

[0092] Step 1, a temperature threshold is set for the refrigeration evaporator in advance, and the temperature threshold is based on the material temperature resistance of the refrigeration evaporator and the safe operation condition of the refrigerator system;

[0093] Step 2, the current temperature value of the refrigeration evaporator is collected in real time by a temperature detection component;

[0094] Step 3, comparing the collected current temperature value of the refrigeration evaporator with the preset temperature threshold;

[0095] Step 4a, if the current temperature value of the refrigeration evaporator is greater than the preset temperature threshold, it is determined that the refrigeration evaporator is in an overheating state, the overheating protection mechanism is triggered, and the operating frequency of the compressor is controlled to be reduced from the current frequency to a target protection frequency;

[0096] Step 4b, if the current temperature value of the refrigeration evaporator is less than or equal to the preset temperature threshold, the current operating frequency of the compressor is maintained, and the refrigeration evaporator operates normally.

[0097] By setting a temperature threshold for the refrigeration evaporator and monitoring the temperature in real time, the application can trigger the overheating protection and reduce the corresponding compressor frequency in time when the temperature of the refrigeration evaporator exceeds the threshold, which not only avoids damage to the refrigeration evaporator due to overheating, but also prevents the compressor from running at a high load for a long time to aggravate energy consumption or cause faults.

[0098] In an optional embodiment, controlling the operating states of the refrigeration circuit and the freezing circuit according to the target cold quantity distribution strategy further includes:

[0099] Step 1, in the case that the target cold quantity distribution strategy is determined as the variable temperature room auxiliary strategy based on the fact that the freezing demand is less than a first preset threshold and the refrigeration demand is less than a second preset threshold, comparing the freezing demand and the refrigeration demand;

[0100] Step 2a, in the case that the freezing demand is greater than the refrigeration demand, connecting the variable temperature room to the freezing loop and opening the freezing air duct and closing the refrigeration air duct, wherein the freezing air duct is used to assist in increasing the cold quantity of the freezing loop through the air fan;

[0101] Step 2b, in the case that the freezing demand is less than the refrigeration demand, connecting the variable temperature room to the refrigeration loop, opening the refrigeration air duct, closing the freezing air duct, and increasing the opening degree of the refrigeration electronic expansion valve, wherein the refrigeration air duct is used to assist in increasing the cold quantity of the refrigeration loop through the air fan.

[0102] In the embodiments of the present application, the variable temperature room is a temperature zone in the refrigeration equipment that can flexibly adjust the temperature range, which can be connected to the refrigeration loop or the freezing loop through air door switching, has no independent refrigeration loop, and relies on the cold quantity supply of the connected loop. The variable temperature room auxiliary strategy is applicable to the conventional scene in which the freezing demand and the refrigeration demand are both lower than the corresponding threshold, and the auxiliary strategy balances the system load by connecting the variable temperature room to the loop of the temperature zone with higher demand to assist the temperature control of the temperature zone. The freezing air duct is an air duct connecting the freezing loop and the variable temperature room, has an air fan built-in, and is used to deliver the cold quantity of the freezing loop to the variable temperature room. The refrigeration air duct is an air duct connecting the refrigeration loop and the variable temperature room, has an air fan built-in, and is used to deliver the cold quantity of the refrigeration loop to the variable temperature room.

[0103] In the embodiments of the present application, when the controller determines that the target cold quantity distribution strategy is the variable temperature room auxiliary strategy, first, the demand comparison is performed to determine the connection direction of the variable temperature room. The controller retrieves the freezing demand and the refrigeration demand, and if the freezing demand > the refrigeration demand, it is determined that the variable temperature room is connected to the freezing loop to assist the temperature control of the freezing room, at this time, the controller can send an opening instruction to the air door of the freezing air duct and a closing instruction to the air door of the refrigeration air duct, and after the freezing air duct is opened, the cold quantity of the freezing loop can be delivered to the variable temperature room through the air duct fan. If the freezing demand < the refrigeration demand, it is determined that the variable temperature room is connected to the refrigeration loop to assist the temperature control of the refrigeration room, at this time, the controller can send an opening instruction to the air door of the refrigeration air duct and a closing instruction to the air door of the freezing air duct, and after the refrigeration air duct is opened, the cold quantity of the refrigeration loop can be delivered to the variable temperature room through the air duct fan.

[0104] In the embodiments of the present application, if the freezing demand is equal to the refrigeration demand, no adjustment is performed.

[0105] The present application allows the variable temperature room to assist the temperature zone with higher demand, maximizes the auxiliary value of the variable temperature room, and reduces the loop load of the temperature zone with higher demand.

[0106] In an optional embodiment, the method further comprises:

[0107] Step 1, obtaining model input parameters, wherein the model input parameters at least include environmental temperature, preset freezing door influence factor and freezing load, and further include current temperature of the freezing chamber, set temperature of the freezing chamber, current temperature of the refrigeration chamber and set temperature of the refrigeration chamber;

[0108] Step 2, inputting the model input parameters into the target prediction model to predict the temperatures of the freezing chamber and the refrigeration chamber after a preset time by using the target prediction model;

[0109] Step 3, obtaining the first temperature prediction value of the freezing chamber and the second temperature prediction value of the refrigeration chamber output by the target prediction model after a preset time;

[0110] Step 4, in the case that either the first temperature prediction value or the second temperature prediction value does not reach the corresponding set temperature, optimizing the operation states of the refrigeration circuit, the freezing circuit and the bypass pipeline until the first temperature prediction value and the second temperature prediction value both reach the corresponding set temperatures.

[0111] In the embodiments of the present application, the model input parameters are multi-dimensional working condition parameters input into the target prediction model, used to represent the current and environmental influence factors of the refrigeration equipment, and are basic data for temperature prediction, at least including environmental temperature, preset freezing door influence factor, freezing load, and current temperature and set temperature of each temperature zone. The preset freezing door influence factor is a coefficient for quantifying the influence degree of the freezing chamber door opening and closing on the freezing chamber temperature, with a value range of 0-1, which can be set by experiment calibration or according to actual requirements, for example, if the door opening and closing causes the temperature to rise by 0.5℃ for 1 time, the influence factor is set to 0.5, which is used to correct the heat load disturbance caused by the door opening and closing. The freezing load is the total mass (unit: kg) of the stored objects in the freezing chamber, and the greater the load, the more cold energy is required to maintain or reduce the temperature, which is a key load parameter for temperature prediction. The target prediction model is a temperature prediction model trained based on historical working condition data, which can output temperature prediction values of each temperature zone after a preset time (such as 1 minute, 10 minutes) according to the input parameters, to realize demand prediction and advance control.

[0112] In the embodiments of the present application, the controller collects or retrieves multi-dimensional model input parameters through the sensor module, storage module and man-machine interaction module of the refrigeration equipment, and inputs the target prediction model to start the temperature prediction process. The model first normalizes the input parameters, then maps the features through the activation function of the hidden layer, and finally outputs the first temperature prediction value of the freezing chamber and the second temperature prediction value of the refrigerating chamber after a preset time. The controller compares the first and second temperature prediction values with the corresponding set temperatures respectively to determine whether the prediction values meet the set temperatures, i.e., whether the prediction meets the standard, and if not, the running state is optimized until the prediction values all meet the standard. For example, the current temperature of the freezing chamber is -10℃, the set temperature is -25℃, the current temperature of the refrigerating chamber is 6℃, and the set temperature is 4℃. The input environment temperature is 30℃, the freezing door influence factor is 0.4, and the freezing load is 3.5kg. The output system running temperature prediction value is that after 1 minute, the freezing chamber is -12.5℃ and the refrigerating chamber is 5.2℃; after 10 minutes, the freezing chamber is -23.5℃ and the refrigerating chamber is 4.5℃. After the system runs for 10 minutes, neither the refrigerating chamber nor the freezing chamber meets the set value, at which time the system optimizes the running: the freezing compressor frequency is increased from 70% to 85% to accelerate cooling, the freezing EEV opening degree is increased from 50% to 65% to increase the flow, and the electromagnetic valve is opened to split 25% of the refrigerant to the refrigerating evaporator. After the system responds for 1 minute, the freezing chamber temperature is -12.1℃ and the refrigerating chamber temperature is 5.2℃, which indicates that the freezing prediction is higher than expected and the refrigerating prediction meets the expectation, indicating that this running scheme is feasible for the refrigerating chamber but not for the freezing chamber, so the temperature prediction is re-performed, the freezing compressor frequency is continuously increased to 90%, the freezing EEV opening degree is increased to 70% to match the compressor flow, and the electromagnetic valve splits 30% of the refrigerant to prevent the compressor from overheating, and after 1 minute of re-prediction, the running scheme is re-adjusted until it meets the prediction value, and the current running scheme is executed to meet the set value.

[0113] The present application realizes on-demand refrigeration capacity supplement through temperature prediction and iterative optimization.

[0114] The application provides a cold quantity distribution method applied to a refrigeration device provided with a refrigeration circuit and a freezing circuit independent of each other, and a bypass pipeline is arranged between the refrigeration circuit and the freezing circuit, and the method comprises the following steps: calculating a current refrigeration demand and a freezing demand of the refrigeration device; determining a target cold quantity distribution strategy according to the refrigeration demand and the freezing demand; controlling the operation states of the refrigeration circuit and the freezing circuit according to the target cold quantity distribution strategy, and controlling the on-off of the bypass pipeline according to the target cold quantity distribution strategy, so as to reuse the refrigeration evaporator in the refrigeration circuit as an auxiliary condenser of the freezing circuit through the bypass pipeline, or to supplement the cold quantity of the freezing circuit to the refrigeration circuit through the bypass pipeline, so as to distribute the cold quantity according to the actual demand of the refrigeration device. The application quantifies the cold quantity demands of each temperature zone by calculating the real-time refrigeration demand and freezing demand, then determines a targeted cold quantity distribution strategy according to the demands, and finally controls the operation states of the independent refrigeration circuit and freezing circuit, and adjusts the on-off of the bypass pipeline between the two, so as to dispatch the cross-circuit cold quantity, realize the on-demand distribution of the cold quantity, avoid the temperature cross talk of the single-cycle system, break through the rigid limitation of the cold quantity distribution of the traditional double-cycle system, and solve the technical problem that the cold quantity distribution of the existing refrigerator cannot adapt to the real-time demands of each temperature zone.

[0115] According to another aspect of the embodiments of the application, as shown in Figure 5 a cold quantity distribution device is provided, comprising:

[0116] a demand calculation module 501 configured to calculate a current refrigeration demand and a freezing demand of the refrigeration device;

[0117] a strategy determination module 503 configured to determine a target cold quantity distribution strategy according to the refrigeration demand and the freezing demand;

[0118] a cold quantity distribution module 505 configured to control the operation states of the refrigeration circuit, the freezing circuit and the bypass pipeline according to the target cold quantity distribution strategy, so as to distribute the cold quantity according to the actual demand of the refrigeration device.

[0119] It should be noted that the demand calculation module 501 in the embodiment can be configured to execute step S202 in the embodiments of the application, the strategy determination module 503 in the embodiment can be configured to execute step S204 in the embodiments of the application, and the cold quantity distribution module 505 in the embodiment can be configured to execute step S206 in the embodiments of the application.

[0120] It should be noted that the above modules and the examples and application scenarios realized by the corresponding steps are the same, but are not limited to the contents disclosed in the above embodiments.

[0121] Optionally, the demand calculation module is specifically configured to: obtain an operation mode set by the target object for the refrigeration equipment; in a case where the operation mode is a refrigeration priority mode, set the refrigeration demand index as a preset maximum value as the refrigeration demand; in a case where the operation mode is an automatic mode, obtain a current temperature, a set temperature, a current temperature change rate of a refrigeration chamber of the refrigeration equipment, and a switching frequency of a refrigeration chamber door, wherein the refrigeration circuit is configured to provide cold energy to the refrigeration chamber; calculate a temperature difference between the current temperature and the set temperature; obtain preset weights of the temperature difference, the current temperature change rate, and the switching frequency respectively, and calculate a weighted sum of the temperature difference, the current temperature change rate, and the switching frequency to obtain the refrigeration demand index as the refrigeration demand.

[0122] Optionally, the demand calculation module is specifically configured to: obtain an operation mode set by the target object for the refrigeration equipment; in a case where the operation mode is a refrigeration priority mode, set the refrigeration demand index as a preset maximum value as the refrigeration demand; in a case where the operation mode is an automatic mode, obtain a current temperature, a set temperature, a current temperature change rate of a refrigeration chamber of the refrigeration equipment, and a switching frequency of a refrigeration chamber door, wherein the refrigeration circuit is configured to provide cold energy to the refrigeration chamber; calculate a temperature difference between the current temperature and the set temperature; obtain preset weights of the temperature difference, the current temperature change rate, and the switching frequency respectively, and calculate a weighted sum of the temperature difference, the current temperature change rate, and the switching frequency to obtain the refrigeration demand index as the refrigeration demand.

[0123] Optionally, the strategy determination module is specifically configured to: in a case where the refrigeration demand is greater than or equal to a first preset threshold, determine the target cold energy distribution strategy as a refrigeration cold energy priority strategy, wherein the first preset threshold is a threshold set for the refrigeration demand; in a case where the refrigeration demand is greater than or equal to a second preset threshold, determine the target cold energy distribution strategy as a refrigeration cold energy priority strategy, wherein the second preset threshold is a threshold set for the refrigeration demand; in a case where the refrigeration demand is less than the first preset threshold and the refrigeration demand is less than the second preset threshold, determine the target cold energy distribution strategy as a variable-temperature chamber auxiliary strategy.

[0124] Optionally, the refrigeration circuit includes a refrigeration compressor, a refrigeration condenser, a refrigeration electronic expansion valve, and a refrigeration evaporator, and a flow path of the refrigerant in the refrigeration circuit is from the refrigeration compressor, the refrigeration condenser, the refrigeration electronic expansion valve, the refrigeration evaporator, and back to the refrigeration compressor; the freezing circuit includes a freezing compressor, a freezing condenser, a freezing electronic expansion valve, and a freezing evaporator, and a flow path of the refrigerant in the freezing circuit is from the freezing compressor, the freezing condenser, the freezing electronic expansion valve, the freezing evaporator, and back to the freezing compressor; the bypass pipeline includes a first pipeline and a second pipeline, an inlet of the first pipeline is connected with the freezing evaporator, an outlet of the first pipeline is connected with the refrigeration evaporator, an inlet of the second pipeline is connected with the refrigeration evaporator, and an outlet of the second pipeline is arranged on the freezing circuit.

[0125] Optionally, the cold amount distribution module is specifically configured to: in a case where the target cold amount distribution strategy is determined to be the freezing cold amount priority strategy based on the freezing demand amount being greater than or equal to a first preset threshold, the first preset threshold being a threshold set for the freezing demand, starting the freezing circuit and stopping the refrigeration circuit; increasing the operating frequency of the freezing compressor from an initial frequency to a first target frequency and increasing the opening degree of the freezing electronic expansion valve from an initial opening degree to a first target opening degree; starting the first pipeline and the second pipeline, so that part of the refrigerant flowing out of the freezing evaporator flows into the refrigeration evaporator through the first pipeline to dissipate heat, and then flows back to the freezing circuit through the second pipeline to circulate.

[0126] Optionally, the cold amount distribution module is further configured to: in a case where the target cold amount distribution strategy is determined to be the refrigeration cold amount priority strategy based on the refrigeration demand amount being greater than or equal to a second preset threshold, the second preset threshold being a threshold set for the refrigeration demand, starting the refrigeration circuit and the freezing circuit; increasing the operating frequency of the refrigeration compressor from an initial frequency to a second target frequency, decreasing the operating frequency of the freezing compressor from an initial frequency to a third target frequency, and increasing the opening degree of the refrigeration electronic expansion valve from an initial opening degree to a second target opening degree, which is greater than the opening degree of the freezing electronic expansion valve; and starting the first pipeline, so that part of the refrigerant flowing out of the freezing evaporator flows into the refrigeration circuit through the first pipeline to circulate.

[0127] Optionally, the cold amount distribution module is further configured to: in a case where the target cold amount distribution strategy is determined to be the variable-temperature room auxiliary strategy based on the freezing demand amount being less than the first preset threshold and the refrigeration demand amount being less than the second preset threshold, comparing the freezing demand amount and the refrigeration demand amount; in a case where the freezing demand amount is greater than the refrigeration demand amount, connecting the variable-temperature room to the freezing circuit and starting the freezing air duct and stopping the refrigeration air duct, the freezing air duct being configured to assist in increasing the cold amount of the freezing circuit through the fan; and in a case where the freezing demand amount is less than the refrigeration demand amount, connecting the variable-temperature room to the refrigeration circuit, starting the refrigeration air duct and stopping the freezing air duct, and increasing the opening degree of the refrigeration electronic expansion valve, the refrigeration air duct being configured to assist in increasing the cold amount of the refrigeration circuit through the fan.

[0128] Optionally, the cold quantity distribution module further comprises an optimization module, specifically configured to: acquire model input parameters, wherein the model input parameters at least include an ambient temperature, a preset freezing door influence factor, and a freezing load, and further include a current temperature of the freezing chamber, a set temperature of the freezing chamber, a current temperature of the refrigerating chamber, and a set temperature of the refrigerating chamber; input the model input parameters into a target prediction model to predict the temperatures of the freezing chamber and the refrigerating chamber after a preset time by using the target prediction model; acquire a first temperature prediction value of the freezing chamber and a second temperature prediction value of the refrigerating chamber output by the target prediction model after the preset time; and optimize the operating states of the refrigerating circuit, the freezing circuit, and the bypass pipeline until the first temperature prediction value and the second temperature prediction value both reach the corresponding set temperatures, in a case where either the first temperature prediction value or the second temperature prediction value does not reach the corresponding set temperature.

[0129] According to another aspect of the embodiments of the present application, the present application provides an electronic device, as shown in the accompanying drawings, comprising a memory 601, a processor 603, a communication interface 605, and a communication bus 607, wherein the memory 601 stores a computer program executable on the processor 603, the memory 601 and the processor 603 communicate through the communication interface 605 and the communication bus 607, and the processor 603 implements the steps of the above method when executing the computer program. Figure 6

[0130] The memory and the processor in the above electronic device communicate through the communication bus and the communication interface. The communication bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The communication bus can be divided into an address bus, a data bus, a control bus, etc.

[0131] The memory can include a Random Access Memory (RAM) and can also include a non-volatile memory, such as at least one disk memory. Optionally, the memory can also be at least one storage device located away from the aforementioned processor.

[0132] ​The processor described above can be a general processor, including a central processing unit (CPU), a network processor (NP), etc.; can also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component.

[0133] According to another aspect of the embodiments of the present application, a computer program product or computer program is also provided, which includes computer instructions stored in a computer readable storage medium. A processor of a computer device reads the computer instructions from the computer readable storage medium, and the processor executes the computer instructions, so that the computer device executes the steps of any of the above embodiments.

[0134] Optionally, in the embodiments of the present application, the computer readable medium is configured to store program codes for the processor to execute the following steps:

[0135] determining a current refrigeration demand and a current freezing demand of the refrigeration device;

[0136] determining a target cold distribution strategy according to the refrigeration demand and the freezing demand;

[0137] controlling the operating states of the refrigeration circuit, the freezing circuit and the bypass pipeline according to the target cold distribution strategy, so as to distribute the cold according to the actual demands of the refrigeration device.

[0138] Optionally, the specific examples in the embodiments of the present application can refer to the examples described in the above embodiments, and the embodiments of the present application will not be described here again.

[0139] In the implementation of the embodiments of the present application, the above various embodiments can be referred to, and the corresponding technical effects are achieved.

[0140] It can be understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing units can be implemented within one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSP Devices), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), general purpose processors, controllers, micro-controllers, microprocessors, other electronic units designed to perform the functions described herein, or a combination thereof.

[0141] For software implementation, the techniques described herein can be implemented with a processing unit that executes software routines or functions to perform the techniques described herein. The software code can be stored in a memory and executed by a processor. The memory can be implemented within the processor or external to the processor.

[0142] Those of ordinary skill in the art can understand that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether the functions are performed in hardware or software depends on the specific application and design constraints of the technical solutions. Those of ordinary skill in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0143] Those of ordinary skill in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described system, device and unit can refer to the corresponding processes in the foregoing method embodiments, which will not be described here.

[0144] In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method can be implemented by other ways. For example, the apparatus embodiments described above are only schematic, and the division of the modules is only a logical function division, and there can be another division in actual implementation, for example, a plurality of modules or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0145] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e. may be located in one place, or may be distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment scheme.

[0146] In addition, the functional units in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit.

[0147] If the functions are realized in the form of software function units and sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solutions of the embodiments of the present application can be embodied in the form of software products, and the computer software products are stored in a storage medium, including a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk, and various program codes that can be stored in the medium. It should be noted that in this paper, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such processes, methods, articles or devices. Without more limitations, the elements defined by the statement "including a" do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0148] The above is only a specific embodiment of the present application, so that those skilled in the art can understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A cold energy distribution method, applied to refrigeration equipment equipped with independent refrigeration and freezing circuits, characterized in that, A bypass pipe is provided between the refrigeration circuit and the freezing circuit, and the method includes: Calculate the current refrigeration and freezing requirements of the refrigeration equipment; Determine the target cold storage allocation strategy based on the refrigeration demand and the freezing demand; The operating status of the refrigeration circuit and the freezing circuit are controlled according to the target cold capacity allocation strategy, and the bypass pipe is controlled according to the target cold capacity allocation strategy, so that the refrigeration evaporator in the refrigeration circuit can be reused as an auxiliary condenser in the freezing circuit through the bypass pipe, or the cold capacity of the freezing circuit can be supplemented to the refrigeration circuit through the bypass pipe, so as to allocate the cold capacity according to the actual needs of the refrigeration equipment. The refrigeration circuit includes a refrigeration compressor, a refrigeration condenser, a refrigeration electronic expansion valve, and a refrigeration evaporator. The refrigerant in the refrigeration circuit flows through the refrigeration compressor, the refrigeration condenser, the refrigeration electronic expansion valve, and the refrigeration evaporator before returning to the refrigeration compressor. The refrigeration circuit includes a refrigeration compressor, a refrigeration condenser, a refrigeration electronic expansion valve, and a refrigeration evaporator. The refrigerant in the refrigeration circuit flows through the refrigeration compressor, the refrigeration condenser, the refrigeration electronic expansion valve, and the refrigeration evaporator before returning to the refrigeration compressor. The bypass pipeline includes a first pipeline and a second pipeline. The inlet of the first pipeline is connected to the outlet of the refrigeration evaporator, and the outlet of the first pipeline is connected to the outlet of the refrigeration evaporator. The inlet of the second pipeline is connected to the inlet of the refrigeration evaporator, and the outlet of the second pipeline is located on the refrigeration circuit. The step of controlling the opening and closing of the bypass pipe according to the target cooling capacity distribution strategy, so as to reuse the refrigeration evaporator in the refrigeration circuit as an auxiliary condenser in the freezing circuit through the bypass pipe, includes: opening the first pipe and the second pipe, so that part of the refrigerant flowing out from the freezing evaporator flows into the refrigeration evaporator through the first pipe to dissipate heat, and then returns to the freezing circuit through the second pipe for circulation; The step of controlling the opening and closing of the bypass pipe according to the target cooling capacity distribution strategy, so that the cooling capacity of the refrigeration circuit is supplemented to the refrigeration circuit through the bypass pipe, includes: opening the first pipe, so that a portion of the refrigerant flowing out of the refrigeration evaporator flows into the refrigeration circuit through the first pipe for circulation.

2. The method according to claim 1, characterized in that, The calculation of the current refrigeration demand of the refrigeration equipment includes: Obtain the operating mode set by the target object for the refrigeration equipment; When the operating mode is refrigeration priority mode, the refrigeration demand index is set to a preset maximum value as the refrigeration demand. When the operating mode is automatic, the current temperature, set temperature, current temperature change rate, and opening and closing frequency of the refrigerator compartment of the refrigeration equipment are acquired, wherein the refrigeration circuit is used to provide cooling capacity to the refrigerator compartment; Calculate the temperature difference between the current temperature and the set temperature; Obtain the preset weights of the temperature difference, the current temperature change rate, and the switching frequency, and calculate the weighted sum of the temperature difference, the current temperature change rate, and the switching frequency to obtain the refrigeration demand index as the refrigeration demand quantity.

3. The method according to claim 1, characterized in that, The calculation of the current freezing demand of the refrigeration equipment includes: Obtain the operating mode set by the target object for the refrigeration equipment; When the operating mode is quick-freeze mode, the freezing demand index is set to a preset maximum value as the freezing demand amount; When the operating mode is automatic, the current temperature, set temperature, current temperature change rate, and opening and closing frequency of the freezer compartment of the refrigeration equipment are acquired, wherein the refrigeration circuit is used to provide cooling capacity to the freezer compartment; Calculate the temperature difference between the current temperature and the set temperature; Obtain the preset weights of the temperature difference, the current temperature change rate, and the switching frequency, and calculate the weighted sum of the temperature difference, the current temperature change rate, and the switching frequency to obtain the freezing demand index as the freezing demand quantity.

4. The method according to claim 1, characterized in that, Before opening the first and second pipes to allow a portion of the refrigerant flowing from the refrigeration evaporator to flow through the first pipe into the refrigerator evaporator for heat dissipation, and then return to the refrigeration circuit through the second pipe for circulation, the method further includes: If the target cold capacity allocation strategy is determined to be a freezing cold capacity priority strategy based on the freezing demand being greater than or equal to a first preset threshold, the freezing circuit is turned on and the refrigeration circuit is turned off. The first preset threshold is a threshold set for the freezing demand. The operating frequency of the refrigeration compressor is increased from the initial frequency to the first target frequency, and the opening degree of the refrigeration electronic expansion valve is increased from the initial opening degree to the first target opening degree.

5. The method according to claim 1, characterized in that, Before opening the first pipeline to allow a portion of the refrigerant flowing from the refrigeration evaporator to circulate through the first pipeline into the refrigeration circuit, the method further includes: If the target cold energy allocation strategy is determined to be a cold energy priority strategy based on the cold energy demand being greater than or equal to a second preset threshold, the cold energy circuit and the freezing circuit are activated, wherein the second preset threshold is a threshold set for the cold energy demand. The operating frequency of the refrigeration compressor is increased from the initial frequency to the second target frequency, and the operating frequency of the refrigeration compressor is decreased from the initial frequency to the third target frequency. The opening degree of the refrigeration electronic expansion valve is increased from the initial opening degree to the second target opening degree, and is greater than the opening degree of the refrigeration electronic expansion valve. The first pipeline is opened, allowing a portion of the refrigerant flowing from the refrigeration evaporator to circulate through the first pipeline into the refrigeration circuit.

6. The method according to claim 1, characterized in that, The step of controlling the operating status of the refrigeration circuit and the freezing circuit according to the target cooling capacity allocation strategy also includes: If the target cold energy allocation strategy is determined to be a variable temperature room auxiliary strategy based on the fact that the freezing demand is less than a first preset threshold and the refrigeration demand is less than a second preset threshold, then the size of the freezing demand and the refrigeration demand are compared. When the freezing demand exceeds the refrigeration demand, the variable temperature compartment is connected to the freezing circuit, and the freezing air duct is turned on while the refrigeration air duct is turned off. The freezing air duct is used to increase the cooling capacity of the freezing circuit with the assistance of a fan. When the freezing demand is less than the refrigeration demand, the variable temperature compartment is connected to the refrigeration circuit, the refrigeration air duct is opened, the freezing air duct is closed, and the opening of the refrigeration electronic expansion valve is increased. The refrigeration air duct is used to increase the cooling capacity of the refrigeration circuit with the assistance of a fan.

7. The method according to any one of claims 1 to 6, characterized in that, The method further includes: Obtain model input parameters, wherein the model input parameters include at least ambient temperature, preset freezer door influence factor and freezer load, and also include the current temperature of the freezer compartment, the set temperature of the freezer compartment, the current temperature of the refrigerator compartment and the set temperature of the refrigerator compartment; The model input parameters are input into the target prediction model to predict the temperature of the freezer and the refrigerator after a preset time. Obtain the first predicted temperature value of the freezer compartment and the second predicted temperature value of the refrigerator compartment after the preset time, as output by the target prediction model; If either the first temperature prediction or the second temperature prediction fails to reach the corresponding set temperature, the operating status of the refrigeration circuit, the freezing circuit, and the bypass pipeline is optimized until both the first temperature prediction and the second temperature prediction reach the corresponding set temperature.

8. A cooling capacity distribution device for implementing the cooling capacity distribution method as described in any one of claims 1-7, characterized in that, include: The demand calculation module is used to calculate the current refrigeration and freezing demand of the refrigeration equipment. The strategy determination module is used to determine a target cold capacity allocation strategy based on the refrigeration demand and the freezing demand; The cold capacity distribution module is used to control the operating status of the refrigeration circuit and the freezing circuit according to the target cold capacity distribution strategy, and to control the opening and closing of the bypass pipe according to the target cold capacity distribution strategy, so as to reuse the refrigeration evaporator in the refrigeration circuit as an auxiliary condenser in the freezing circuit through the bypass pipe, or to supplement the cold capacity of the freezing circuit to the refrigeration circuit through the bypass pipe, so as to distribute the cold capacity according to the actual needs of the refrigeration equipment.

9. A refrigeration device, comprising a memory, a processor, a communication interface, and a communication bus, wherein the memory stores a computer program executable on the processor, and the memory and the processor communicate via the communication bus and the communication interface, characterized in that... When the processor executes the computer program, it implements the cooling capacity distribution method according to any one of claims 1 to 7.

10. A computer-readable medium having processor-executable non-volatile program code, characterized in that, The program code causes the processor to execute the cooling capacity distribution method according to any one of claims 1 to 7.

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