CN117404865A

CN117404865A - Refrigeration equipment control method and device, electric equipment and storage medium

Info

Publication number: CN117404865A
Application number: CN202311325425.5A
Authority: CN
Inventors: 龙凌锋; 胡浩然; 梁喜芬; 刘向阳; 刘环宇
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2024-01-16

Abstract

The embodiment of the application relates to a refrigeration equipment control method, a refrigeration equipment control device, electric equipment and a storage medium, wherein the method comprises the following steps: collecting current refrigeration side temperature data and heat dissipation side temperature data of refrigeration equipment; determining whether the refrigeration equipment currently meets refrigeration efficiency optimization conditions or not based on the refrigeration side temperature data and the heat radiation side temperature data; if the refrigerating efficiency optimization condition is met, determining a target control object of the refrigerating equipment; and adjusting control parameters of the target control object based on the corresponding relation between the working state of the target control object and the refrigerating efficiency to adjust the working state of the target control object to a target state, wherein the target state of the target control object is used for improving the refrigerating efficiency of the refrigerating equipment. According to the embodiment of the application, the refrigerating efficiency of the refrigerating equipment is improved, the structural design difficulty is reduced, and the design and manufacturing cost of the refrigerating equipment is further reduced.

Description

Refrigeration equipment control method and device, electric equipment and storage medium

Technical Field

The present disclosure relates to the field of electric device control technologies, and in particular, to a method and an apparatus for controlling a refrigeration device, an electric device, and a computer readable storage medium.

Background

With the development of refrigeration technology, besides the scheme of using a refrigerant to perform refrigeration, a solid-state refrigerator such as a TEC refrigerating plate can be used, and the refrigerator performs refrigeration by controlling the magnitude of an input current. However, the refrigeration efficiency of the TEC refrigeration sheet is related to the temperature difference of the cold and hot surfaces, the input current is related to the magnitude of the input current and other parameters, namely the larger the temperature difference is, the lower the refrigeration efficiency is, the higher the input current is in a certain interval, the input current exceeds the interval, and the refrigeration efficiency is reduced.

In order to improve the refrigeration efficiency, a common solution is to adjust the heat dissipation structure to reduce the temperature difference between the cold and hot ends. However, these schemes have the problem that the control parameters cannot be actively changed to adjust the input power, the heat exchange power and the like, so that the refrigeration efficiency of the refrigerator cannot be further improved.

Disclosure of Invention

In view of the above, in order to solve some or all of the above technical problems, embodiments of the present application provide a method, an apparatus, an electric device, and a computer readable storage medium for controlling a refrigeration device.

In a first aspect, an embodiment of the present application provides a method for controlling a refrigeration device, including: collecting current refrigeration side temperature data and heat dissipation side temperature data of refrigeration equipment; determining whether the refrigeration equipment currently meets refrigeration efficiency optimization conditions or not based on the refrigeration side temperature data and the heat radiation side temperature data; if the refrigeration efficiency optimization condition is met, determining a target control object of the refrigeration equipment; and adjusting control parameters of the target control object based on the corresponding relation between the working state of the target control object and the refrigerating efficiency, so that the working state of the target control object is adjusted to be a target state, wherein the target state of the target control object is used for improving the refrigerating efficiency of the refrigerating equipment.

In one possible embodiment, the refrigeration appliance includes a chiller, the refrigeration side temperature data includes a first cold side temperature of the chiller, and the heat sink side temperature data includes a first hot side temperature of the chiller; and determining whether the refrigeration equipment currently meets refrigeration efficiency optimization conditions based on the refrigeration side temperature data and the heat radiation side temperature data, including: determining a first temperature difference between the first hot end temperature and the first cold end temperature, and a continuous working time of the refrigerator; determining the current defrosting interval time; determining whether the first cold end temperature is less than or equal to a preset defrosting temperature, whether the continuous working time exceeds a defrosting interval time, and whether the first temperature difference exceeds a maximum allowable temperature difference; if the temperature of the first cold end is smaller than or equal to the defrosting temperature, the continuous working time exceeds the defrosting interval time, the first temperature difference does not exceed the maximum allowable temperature difference, and it is determined that the refrigeration equipment currently meets the refrigeration efficiency optimization condition.

In one possible embodiment, determining a target control object of the refrigeration appliance includes: determining the input current of the refrigerator as a target control object; and adjusting control parameters of the target control object to adjust the working state of the target control object to the target state, including: cutting off the input current of the refrigerator to reduce the first temperature difference; in response to determining that the first temperature difference is less than or equal to a first preset temperature difference, controlling the refrigerator to operate at a rated reverse current to increase the first cold end temperature; and in response to the first cold end temperature reaching a preset defrosting exit temperature, cutting off rated reverse current, setting the continuous operation time as an initial value and recording the continuous operation time again.

In one possible embodiment, the refrigeration appliance further comprises a heat exchanger comprising a cold side heat exchanger and a hot side heat exchanger; and determining a target control object of the refrigeration equipment, comprising: determining a cold end heat exchanger and a hot end heat exchanger as target control objects; and adjusting control parameters of the target control object to adjust the working state of the target control object to the target state, including: controlling the cold side heat exchanger and the hot side heat exchanger to stop running in response to the fact that the refrigerator is currently running at the rated reverse current, or the current input current of the refrigerator is zero and the operation of the refrigerator is finished at the rated reverse current; and in response to the fact that the current input current of the refrigerator is zero and the refrigerator is not operated at the rated reverse current, controlling the cold-end heat exchanger to stop operation and controlling the hot-end heat exchanger to continue operation.

In one possible embodiment, after determining the first difference in the first hot side temperature and the first cold side temperature, the method further comprises: in response to determining that the first temperature difference is greater than or equal to a preset maximum allowable temperature difference, determining that the refrigeration equipment currently meets refrigeration efficiency optimization conditions; and determining a target control object of the refrigeration equipment, comprising: determining the input current of the refrigerator as a target control object; and adjusting control parameters of the target control object to adjust the working state of the target control object to the target state, including: cutting off the input current of the refrigerator to reduce the first temperature difference; and restoring the input current in response to the first temperature difference decreasing to a second preset temperature difference.

In one possible embodiment, determining the current defrosting interval time includes: determining the current humidity of a refrigerating space aimed by refrigerating equipment, and acquiring the preset reference humidity of the refrigerating space; determining a humidity difference between the current humidity and a preset reference humidity, and determining the current defrosting interval time reduction based on a corresponding relation between the humidity difference and the defrosting interval time increment; and determining the current defrosting interval time based on the preset initial defrosting interval time and the current defrosting interval time reduction.

In one possible embodiment, after determining whether the first cold end temperature is less than or equal to a preset defrost temperature and whether the continuous operation time exceeds a defrost interval, the method further comprises: if the continuous working time does not exceed the defrosting interval time, searching a target input current corresponding to the first temperature difference from a preset refrigeration efficiency table, wherein the target input current is the input current corresponding to the highest refrigeration efficiency of the refrigerator under the first temperature difference; determining the current refrigeration power of the refrigerator, and determining whether the current refrigeration power meets preset refrigeration power conditions; and if the refrigerating power condition is met, controlling the input current of the refrigerator to the target input current.

In one possible embodiment, after determining whether the current cooling power meets the preset cooling power condition, the method further includes: if the current refrigeration power does not meet the refrigeration power condition, searching a maximum effective input current corresponding to the first temperature difference from a refrigeration efficiency table, wherein the maximum effective input current is the maximum input current which enables the refrigeration efficiency of the refrigerator to be in a target refrigeration efficiency range; the input current of the refrigerator is adjusted to the maximum effective input current so as to increase the refrigeration power of the refrigerator.

In one possible embodiment, determining whether the current cooling power meets a preset cooling power condition includes: determining whether the current refrigeration power is greater than or equal to a preset heat leakage power and a minimum refrigeration power; and if the current refrigeration power is greater than or equal to the heat leakage power and the lowest refrigeration power, determining that the current refrigeration power meets the refrigeration power condition.

In one possible embodiment, the refrigeration appliance includes a heat exchanger including a warm side heat exchanger, and the heat sink side temperature data includes a second warm side temperature of the warm side heat exchanger; and determining whether the refrigeration equipment currently meets refrigeration efficiency optimization conditions based on the refrigeration side temperature data and the heat radiation side temperature data, including: collecting the ambient temperature of the space where the refrigeration equipment is located; determining an opening temperature of the hot side heat exchanger based on the ambient temperature; and in response to determining that the second hot end temperature exceeds the opening temperature, determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition.

In one possible embodiment, determining a target control object of the refrigeration appliance includes: determining a hot-end heat exchanger as a target control object; and adjusting control parameters of the target control object to adjust the working state of the target control object to the target state, including: and controlling the hot end heat exchanger to perform active heat exchange so as to reduce the temperature of the second hot end.

In one possible embodiment, determining the on-temperature of the hot side heat exchanger based on the ambient temperature comprises: determining a preset offset temperature corresponding to the ambient temperature; the sum of the ambient temperature and the offset temperature is determined as the on temperature of the hot side heat exchanger.

In one possible embodiment, the heat exchanger comprises a cold side heat exchanger and the refrigeration side temperature data comprises a second cold side temperature of the cold side heat exchanger; based on the refrigeration side temperature data and the heat dissipation side temperature data, determining whether the refrigeration equipment currently meets the refrigeration efficiency optimization condition, further comprises: collecting the space temperature of a refrigerating space aimed by refrigerating equipment; determining whether a second temperature difference between the space temperature and the second cold end temperature exceeds a third preset temperature difference; if the temperature difference exceeds the third preset temperature difference, determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition.

In one possible embodiment, determining a target control object of the refrigeration appliance includes: determining a cold end heat exchanger as a target control object; and adjusting control parameters of the target control object to adjust the working state of the target control object to the target state, including: determining the current target operating power of the cold-end heat exchanger based on the corresponding relation between the second temperature difference and the operating power of the cold-end heat exchanger; and adjusting the operating power of the cold-end heat exchanger to the target operating power.

In a second aspect, an embodiment of the present application provides a refrigeration apparatus control device, including: the acquisition module is used for acquiring the current refrigeration side temperature data and the heat dissipation side temperature data of the refrigeration equipment; the first determining module is used for determining whether the refrigeration equipment currently meets the refrigeration efficiency optimizing condition or not based on the refrigeration side temperature data and the heat radiation side temperature data; the second determining module is used for determining a target control object of the refrigeration equipment if the refrigeration efficiency optimizing condition is met; the first adjusting module is used for adjusting the control parameters of the target control object based on the corresponding relation between the working state of the target control object and the refrigerating efficiency, so that the working state of the target control object is adjusted to the target state, wherein the target state of the target control object is used for improving the refrigerating efficiency of the refrigerating equipment.

In a third aspect, an embodiment of the present application provides an electrical device, including: a memory for storing a computer program; a processor for executing a computer program stored in a memory, and when the computer program is executed, implementing a method according to any one of the embodiments of the refrigeration equipment control method of the first aspect of the present application; and the refrigeration equipment is used for receiving the control parameters output by the processor and adjusting the working state of the target control object to the target state.

In a fourth aspect, embodiments of the present application provide a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements a method as in any of the embodiments of the refrigeration appliance control method of the first aspect described above.

In a fifth aspect, embodiments of the present application provide a computer program comprising computer readable code which, when run on a device, causes a processor in the device to implement a method as in any of the embodiments of the refrigeration appliance control method of the first aspect described above.

According to the refrigeration equipment control method, the refrigeration equipment control device, the electric equipment and the computer readable storage medium, through collecting the refrigeration side temperature data and the heat dissipation side temperature data of the refrigeration equipment, when judging that the refrigeration equipment currently meets the refrigeration efficiency optimization condition based on the refrigeration side temperature data and the heat dissipation side temperature data, the control parameters of the target control object are adjusted based on the corresponding relation between the working state of the target control object and the refrigeration efficiency, so that the working state of the target control object is adjusted to the target state, and the refrigeration efficiency of the refrigeration equipment is improved. According to the embodiment of the application, the control parameters are adjusted in real time according to the current working state of the refrigeration equipment, so that the refrigeration efficiency is actively adjusted, the refrigeration equipment works in a target state with higher refrigeration efficiency, the refrigeration efficiency of the refrigeration equipment is improved to the greatest extent, and the influence of objective conditions such as the ambient temperature and the hardware structure of the refrigeration equipment on the refrigeration efficiency is reduced. In addition, the embodiment of the application does not need to adjust the heat dissipation structure, and reduces the structural design difficulty on the basis of improving the refrigeration efficiency, thereby further reducing the design and manufacturing cost of the refrigeration equipment.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which the figures of the drawings are not to be taken in a limiting sense, unless otherwise indicated.

Fig. 1 is a schematic flow chart of a control method of a refrigeration device according to an embodiment of the present application;

fig. 2 is a schematic flow chart of another control method of a refrigeration device according to an embodiment of the present application;

fig. 3 is a schematic flow chart of another control method of a refrigeration device according to an embodiment of the present application;

Fig. 4 is a schematic flow chart of another control method of a refrigeration device according to an embodiment of the present application;

fig. 5 is a schematic flow chart of another control method of a refrigeration device according to an embodiment of the present application;

fig. 6 is a schematic diagram of a correspondence relationship between an input current and refrigeration efficiency according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of a heat exchanger and a refrigerator according to an embodiment of the present disclosure;

fig. 8 is a schematic flow chart of another control method of a refrigeration device according to an embodiment of the present application;

fig. 9 is a schematic flow chart of another control method of a refrigeration device according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of a control device for a refrigeration apparatus according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of an electric device according to an embodiment of the present application.

Detailed Description

Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings, it being apparent that the described embodiments are some, but not all embodiments of the present application. It should be noted that: the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless it is specifically stated otherwise.

It will be appreciated by those skilled in the art that terms such as "first," "second," and the like in the embodiments of the present application are used merely to distinguish between different steps, devices, or modules, and do not represent any particular technical meaning or logical sequence therebetween.

It should also be understood that in this embodiment, "plurality" may refer to two or more, and "at least one" may refer to one, two or more.

It should also be appreciated that any component, data, or structure referred to in the embodiments of the present application may be generally understood as one or more without explicit limitation or the contrary in the context.

In addition, the term "and/or" in this application is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this application, the character "/" generally indicates that the associated object is an or relationship.

It should also be understood that the description of the embodiments herein emphasizes the differences between the embodiments, and that the same or similar features may be referred to each other, and for brevity, will not be described in detail.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the application, its application, or uses.

Techniques, circuits, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. For an understanding of the embodiments of the present application, the present application will be described in detail below with reference to the drawings in conjunction with the embodiments. It will be apparent that the embodiments described are some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to solve the technical problem that the prior art cannot actively adjust the control parameters of the refrigeration equipment to improve the refrigeration efficiency, the application provides a control method of the refrigeration equipment, which can enable the refrigeration equipment to work in a state with higher refrigeration efficiency.

Fig. 1 is a schematic flow chart of a control method of a refrigeration device according to an embodiment of the present application. The method can be applied to electric equipment with refrigeration functions such as a refrigerator, a freezer, an air conditioner and the like, and also can be applied to equipment which is in communication connection with the electric equipment with the refrigeration functions, such as one or more pieces of equipment such as a smart phone, a notebook computer, a desktop computer, a portable computer, a server and the like, and the equipment can execute the method and output control parameters to the refrigeration equipment in a wired or wireless transmission mode so as to adjust the working state of the refrigeration equipment. The main execution body of the method may be hardware or software. When the execution body is hardware, the execution body may be one or more of the devices. For example, a single device may perform the method, or multiple devices may cooperate with each other to perform the method. When the execution subject is software, the method may be implemented as a plurality of software or software modules, or may be implemented as a single software or software module. The present invention is not particularly limited herein.

As shown in fig. 1, the method specifically includes:

step 101, acquiring current refrigeration side temperature data and heat dissipation side temperature data of the refrigeration equipment.

The refrigerating equipment can be a single equipment or a module for refrigerating, which is arranged on some electric equipment. As an example, the refrigeration device may include a refrigerator, which may be a semiconductor refrigeration chiller (TEC), and a heat exchanger, which may include cold side loads, hot side loads, heat sinks, heat dissipation fans, and the like. The refrigeration side temperature data may include a cold side temperature of the refrigerator (e.g., a refrigeration side temperature of a TEC), a cold side heat exchanger temperature (e.g., a temperature on the cold side heat exchanger), etc.; the heat sink side temperature data may include a hot side temperature of the refrigerator (e.g., a heat generating side temperature on the TEC opposite the cooling side), a hot side heat exchanger temperature (e.g., a temperature on the heat sink), etc.

Step 102, determining whether the refrigeration equipment currently meets the refrigeration efficiency optimization condition or not based on the refrigeration side temperature data and the heat radiation side temperature data.

The refrigeration efficiency optimization condition is a condition for adjusting the working state of the refrigeration equipment to improve the refrigeration efficiency of the refrigeration equipment. As an example, the refrigeration side temperature data includes a cold side temperature of the refrigerator, and the heat dissipation side temperature data includes a hot side temperature of the refrigerator, and when a temperature difference between the hot side temperature and the cold side temperature is greater than a preset maximum allowable temperature difference, it is determined that the refrigeration efficiency optimization condition is met, and at this time, an input current of the refrigerator needs to be disconnected or a reverse current needs to be input to the refrigerator, so that the temperature difference is reduced. Or, the heat dissipation side temperature data may include the temperature on the heat sink of the hot end, and if the temperature is greater than a preset temperature threshold, it may be determined that the cooling efficiency optimization condition is met, and at this time, the power of the heat dissipation fan may be increased, so as to increase the heat dissipation speed.

And step 103, if the refrigeration efficiency optimization condition is met, determining a target control object of the refrigeration equipment.

In this embodiment, the type of the cooling efficiency optimization condition may be determined as the corresponding target control object. For example, when the temperature difference between the hot side temperature and the cold side temperature is greater than a preset maximum allowable temperature difference, determining the input current of the refrigerator as a target control object. For another example, when the temperature on the radiator is greater than a preset temperature threshold, it may be determined that the heat radiation fan is the target control object.

Step 104, adjusting the control parameters of the target control object based on the corresponding relation between the working state of the target control object and the refrigeration efficiency, so as to adjust the working state of the target control object to the target state.

Wherein, the target state of the target control object is used for improving the refrigeration efficiency of the refrigeration equipment. In general, a refrigerator included in the refrigeration device is a TEC, and a calculation formula of refrigeration efficiency of the TEC is cop=qc/Pin, where COP (Coefficient of Performance) indicates refrigeration efficiency, qc indicates refrigeration power, and Pin indicates input power.

In general, in the case of a fixed input current, the COP of the TEC is inversely related to the temperature difference at the cold and hot sides, i.e., the larger the temperature difference, the lower the COP. Therefore, in order to improve the refrigerating efficiency of the refrigerating apparatus, it is necessary to reduce the temperature difference between the cold side temperature and the hot side temperature of the refrigerator.

As an example, if the temperature difference between the hot side temperature and the cold side temperature is greater than the preset maximum allowable temperature difference, the input current is determined to be the target control object, and the input current may be cut off, or the reverse current may be input, so as to reduce the temperature difference between the cold side temperature and the hot side temperature of the refrigerator. For another example, if the temperature on the radiator is greater than the preset temperature threshold, the heat dissipation fan is determined to be a target control object, so that the driving power of the heat dissipation fan can be increased to increase the heat dissipation speed of the hot end of the refrigerator, and further the temperature difference between the cold end temperature and the hot end temperature of the refrigerator is reduced.

According to the refrigeration equipment control method, the refrigeration side temperature data and the heat dissipation side temperature data of the refrigeration equipment are collected, when the refrigeration equipment is judged to be in accordance with the refrigeration efficiency optimization condition currently based on the refrigeration side temperature data and the heat dissipation side temperature data, the control parameters of the target control object are adjusted based on the corresponding relation between the working state of the target control object and the refrigeration efficiency, and the working state of the target control object is adjusted to the target state, so that the refrigeration efficiency of the refrigeration equipment is improved. The method realizes the real-time adjustment of control parameters according to the current working state of the refrigeration equipment so as to actively adjust the refrigeration efficiency, so that the refrigeration equipment works in a target state with higher refrigeration efficiency, thereby improving the refrigeration efficiency of the refrigeration equipment to the maximum extent and reducing the influence of objective conditions such as the environmental temperature, the hardware structure and the like of the refrigeration equipment on the refrigeration efficiency. In addition, the method does not need to adjust the heat dissipation structure, and reduces the structural design difficulty on the basis of improving the refrigeration efficiency, thereby further reducing the design and manufacturing cost of the refrigeration equipment.

In some alternative implementations of the present embodiment, the refrigeration device includes a chiller, the refrigeration side temperature data includes a first cold side temperature of the chiller, and the heat sink side temperature data includes a first hot side temperature of the chiller.

The refrigerator can be a semiconductor refrigerating plate (TEC), which is also called a thermoelectric refrigerator. TEC is a special semiconductor whose carriers are also composed of holes and electrons. When a positive electric field is applied to the PN junction from the outside, P-type holes (polynomials) and N-type electrons (polynomials) are combined with at the nodule to release energy, so that a hot end, namely a heat radiating surface is formed; when a reverse electric field is applied to the PN junction from the outside, the P-type electrons (minority carriers) and the N-type holes (minority carriers) are peeled off from the nodes to absorb energy, and a cold end, namely a refrigeration surface, is formed. The first cold end temperature is the temperature collected from the refrigerating surface, and the first hot end temperature is the temperature collected from the radiating surface.

As shown in fig. 2, step 102 includes:

step 10201, determining a first temperature difference between the first hot side temperature and the first cold side temperature, and a continuous operation time of the refrigerator.

Wherein the continuous operation time is a time during which the refrigerator continuously performs the cooling operation.

Step 10202, determining the current defrosting interval.

The defrosting interval time is the interval time for performing two defrosting operations on the cold end of the refrigerator. Alternatively, the defrosting interval time may be a fixed time, for example, once daily defrosting operation is performed; the defrosting interval time may also be changed in real time, for example, an initial defrosting interval time is set, and the defrosting interval time is updated according to the humidity of the refrigerating space (the larger the humidity is, the shorter the defrosting interval time is) under the condition that the temperature of the first cold end is not reduced to the preset defrosting temperature.

Generally, after the cold end of the refrigerator refrigerates the refrigerating space, the cold end may frost along with the reduction of the temperature of the refrigerating space, and the frosting of the cold end may obstruct the heat exchange of the cold end, resulting in the rise of the first temperature difference, thereby reducing the refrigerating efficiency. Therefore, the refrigerator needs to be continuously operated for a certain period of time to perform a defrosting operation.

Step 10203, determining whether the first cold end temperature is less than or equal to a preset defrosting temperature and whether the continuous operation time exceeds a defrosting interval time.

Step 10204, if the first cold end temperature is less than or equal to the defrosting temperature and the continuous working time exceeds the defrosting interval time, determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition.

According to the embodiment, by determining the first temperature difference between the first hot end temperature and the first cold end temperature of the refrigerator and determining the defrosting interval time, when the first cold end temperature is smaller than or equal to the defrosting temperature and the continuous working time exceeds the defrosting interval time and the first temperature difference does not exceed the maximum allowable temperature difference, the condition of optimizing the refrigerating efficiency is met, the real-time monitoring of the frosting state of the cold end of the refrigerator is realized, and therefore defrosting operation of the cold end of the refrigerator is facilitated in time, and the refrigerating efficiency of the refrigerator is improved.

In some optional implementations of the present embodiment, as shown in fig. 2, the step 103 includes:

in step 10301, the input current of the refrigerator is determined as the target control object.

In the case that the input current does not exceed the maximum limiting current, generally, the magnitude of the input current is positively correlated with the refrigeration power of the refrigerator under a certain fixed temperature difference, that is, the larger the input current is, the higher the refrigeration power is, and correspondingly, the lower the cold end temperature of the refrigerator is.

Step 104 comprises:

in step 10401, the input current to the refrigerator is cut off to reduce the first temperature difference.

When the input current is 0, the refrigerator stops refrigerating, and the first temperature difference gradually decreases.

In step 10402, in response to determining that the first temperature difference is less than or equal to a first preset temperature difference, the refrigerator is controlled to operate at a rated reverse current to increase the first cold end temperature.

As an example, the first preset temperature difference may be 5 ℃. When the first temperature difference gradually decreases to be smaller than or equal to a first preset temperature difference, the input current can be set to be reverse, so that the cold end temperature of the refrigerator is rapidly increased, and the hot end temperature is rapidly decreased.

In step 10403, in response to the first cold end temperature reaching the preset defrost exit temperature, the rated reverse current is cut off, and the continuous operation time is set to an initial value and re-recorded.

As an example, the defrost exit temperature may be +5℃. When the cold end temperature of the refrigerator is increased to the defrosting exit temperature, the rated reverse current is cut off, namely the input current of the refrigerator is cut off again, and the defrosting operation is finished. Meanwhile, the continuous operation time may be set to an initial value (e.g., 0), and recording of the continuous operation time is restarted from the initial value, waiting for the next defrosting operation to be performed.

According to the embodiment, the input current is used as a target control object, when defrosting operation needs to be performed, the on-off state and the flow direction of the input current are controlled, so that the purpose of defrosting the cold end of the refrigerator is achieved, and the influence of cold end frosting on the refrigerating efficiency is reduced.

In some alternative implementations of the present embodiment, the refrigeration appliance further includes a heat exchanger including a cold side heat exchanger and a hot side heat exchanger. The cold-end heat exchanger can comprise a cold-end radiator, a cold-end fan and the like, and is used for absorbing heat of the refrigerating space so as to reduce the temperature of the refrigerating space; the hot side heat exchanger may include a hot side radiator, a hot side fan, etc. for radiating heat to the outside, so that the hot side temperature of the refrigerator is reduced.

Based on the corresponding embodiment of fig. 2, as shown in fig. 3, the step 103 includes:

step 10302, determining the cold side heat exchanger and the hot side heat exchanger as target control targets.

Based on this, step 104 comprises:

in step 10404, the cold side heat exchanger and the hot side heat exchanger are controlled to cease operation in response to the chiller currently operating at the rated reverse current, or the chiller currently operating at zero input current and ending at the rated reverse current.

When the refrigerator operates with rated reverse current, the cold end temperature of the refrigerator rises, the hot end temperature is reduced, the cold end heat exchanger stops operating, the heat exchange process between the cold end of the refrigerator and the cold end heat exchanger can be slowed down, the cold end temperature rise is facilitated, and the defrosting speed is improved; the hot end heat exchanger stops running, so that the heat exchange process of the hot end of the refrigerator can be slowed down, the hot end can be kept at a low temperature, and the temperature of the hot cold end is reduced after defrosting is finished.

When the input current of the refrigerator is zero and the operation is finished with rated reverse current, the cold end heat exchanger and the hot end heat exchanger stop operating, so that the temperature of the cold end heated by the refrigerator and the temperature of the cold end cooled by the refrigerator can be kept for a certain time, and the temperature of the cold end can be reduced spontaneously after defrosting is finished.

In step 10405, in response to the current input current of the refrigerator being zero and not operating at the rated reverse current, the cold side heat exchanger is controlled to stop operating and the hot side heat exchanger is controlled to continue operating.

When the input current is zero and the input current does not run at the rated reverse current, the current is cut off, but the rated reverse current is not started at the moment because the first temperature difference is not reduced to the first preset temperature difference. After the input current is cut off, the cold end temperature can be pulled up by the hot end, if the cold end heat exchanger is started at this time, the cold end heat loss can be caused, the process that the cold end temperature is pulled up by the hot end is slowed down, the process that the first temperature difference is reduced is also slowed down, the refrigeration efficiency is not beneficial to being improved, and therefore the cold end heat exchanger needs to be closed. The hot end heat exchanger continues to operate, so that the temperature of the hot end can be continuously reduced, and the speed of reducing the first temperature difference is increased.

According to the embodiment, whether the input current is cut off or not and whether the rated reverse current is finished or not are judged, and the running states of the cold-end heat exchanger and the hot-end heat exchanger are controlled, so that the temperature difference between the hot-end temperature and the cold-end temperature of the refrigerator is reduced as soon as possible, the refrigeration efficiency is further improved, and the power consumption of refrigeration equipment is reduced.

In some optional implementations of the present embodiment, as shown in fig. 4, after step 10201, the method further includes:

in step 10205, in response to determining that the first temperature difference is greater than or equal to a preset maximum allowable temperature difference, it is determined that the refrigeration appliance currently meets refrigeration efficiency optimization conditions.

Step 103 comprises:

step 10303, determining the input current of the refrigerator as the target control object.

Step 104 comprises:

in step 10406, the input current to the refrigerator is cut off to reduce the first temperature difference.

After the input current is cut off, the cold end of the refrigerator is not refrigerated, the hot end is not radiating, and the temperature of the cold end can be gradually increased by the hot end, so that the first temperature difference is reduced.

In step 10407, the input current is restored in response to the first temperature difference decreasing to a second preset temperature difference.

As an example, if the maximum allowable temperature difference is Δtmax, the second preset temperature difference may be 0.8 Δtmax, and when the first temperature difference is reduced to the second preset temperature difference, the current may be continuously input to the refrigerator, so that the refrigerator operates normally. And further continues to perform other steps of the method.

According to the embodiment, whether the temperature difference between the hot end temperature and the cold end temperature of the refrigerator exceeds the maximum allowable temperature difference is judged to control the on-off state of the input current, so that the refrigeration efficiency reduction caused by the overlarge temperature difference between the hot end temperature and the cold end temperature of the refrigerator can be effectively avoided, and the refrigeration effect of the refrigeration equipment is improved.

In some alternative implementations of the present embodiment, step 10202 may be performed as follows:

first, the current humidity of a refrigerating space aimed by the refrigerating equipment is determined, and the preset reference humidity of the refrigerating space is obtained.

The refrigerating space is a space for refrigerating equipment to refrigerate, such as a refrigerating chamber of a refrigerator. The preset reference humidity may be set manually in advance. The current humidity may be a real-time humidity read from a hygrometer in the refrigerated space, or may be a humidity obtained by calculating a plurality of humidity values read over a period of time (for example, by averaging a plurality of humidity values).

And then, determining a humidity difference between the current humidity and a preset reference humidity, and determining the current defrosting interval time reduction based on the corresponding relation between the humidity difference and the defrosting interval time increment.

Specifically, the correspondence between the humidity difference and the time increment of the defrosting interval can be represented by a table, a calculation formula, or the like. When expressed by a calculation formula, the current defrosting interval time reduction amount can be calculated using algorithms such as PID, PI, etc.

Taking the position PI algorithm as an example, the defrosting shortening time (i.e. the time shortened compared with the initial defrosting time) is calculated at the time t according to the following formula:

ΔR(t)＝Rv(t)-Rs (2)

wherein Rv (t) is current humidity, rs is preset reference humidity, deltaR (t) is humidity difference, kp is set proportionality coefficient, ti is integral time, and t_sr (t) is defrosting shortening time.

Taking the increment value of the moment t compared with the moment t-1, and performing digital discretization processing to obtain the following components:

the current defrosting interval time reduction is as follows:

t_sr(t)＝Δt_sr(t)+t_sr(t-1) (4)

and finally, determining the current defrosting interval time based on the preset initial defrosting interval time and the current defrosting interval time reduction.

Continuing the above example, subtracting the current defrosting interval time reduction amount on the basis of the initial defrosting interval time, namely the current defrosting interval time, wherein the specific formula is as follows:

t_smax＝t_smax(Original)-t_sr(t) (5)

t_smax is the current defrosting interval time, and t_ smax (Original) is the initial defrosting interval time.

According to the embodiment, the humidity of the refrigerating space is collected, the current defrosting interval time is determined according to the humidity value, the defrosting interval time can be automatically shortened when the humidity of the refrigerating space is high, the setting mode of the defrosting interval time is more accurate, and therefore the defrosting efficiency of the cold end of the refrigerator is improved.

In some alternative implementations of the present embodiment, as shown in fig. 5, after step 10203, the method further includes:

step 10206, if the continuous working time does not exceed the defrosting interval time, searching a target input current corresponding to the first temperature difference from a preset refrigeration efficiency table.

The target input current is the input current corresponding to the highest refrigeration efficiency of the refrigerator under the first temperature difference. As shown in fig. 6, the relationship between the input current Iin and the refrigeration efficiency COP when the first temperature difference is a fixed value is shown in the refrigeration efficiency table, and the refrigeration efficiency COP of the refrigerator is highest at the target input current Ip.

If the continuous operation time does not exceed the defrosting interval time, the defrosting operation on the cold end of the refrigerator is not needed at this time, so that the optimal input current of the refrigerator can be set.

Step 10207, determining the current cooling power of the refrigerator, and determining whether the current cooling power meets a preset cooling power condition.

The present cooling power can be determined according to the present input current, and the cooling power condition is a precondition for making the refrigerator work with the target input current. As an example, a refrigeration power threshold may be set, and if the current refrigeration power is smaller than the refrigeration power threshold, it indicates that the refrigeration power is within the allowable range, and the refrigeration efficiency is not reduced due to the excessive refrigeration power, at this time, it may be determined that the refrigeration power condition is met.

If the cooling power condition is met, the following step 10208 is performed.

In step 10208, the input current of the refrigerator is controlled to the target input current.

When the refrigerating power meets the refrigerating power condition, the optimal input current is the target input current, and the refrigerating efficiency of the refrigerator is highest at the moment.

Optionally, when the input current of the refrigerator exceeds the maximum allowable current and/or the input voltage of the refrigerator exceeds the maximum allowable voltage, the input current of the refrigerator may be cut off, and the steps included in the method are re-performed, so as to reset the input current and the input voltage.

According to the embodiment, the refrigerating power condition judgment is carried out on the refrigerating power of the refrigerator in the non-defrosting stage of the refrigerator, so that the refrigerator can work with the highest refrigerating efficiency, and the refrigerating effect of the refrigerating equipment is optimal.

In some alternative implementations of the present embodiment, as shown in fig. 5, after step 10207, if the cooling power condition is not met, the following step 10209 is performed:

step 10209, searching the maximum effective input current corresponding to the first temperature difference from the refrigeration efficiency table.

Wherein the maximum effective input current is a maximum input current that brings the refrigeration efficiency of the refrigerator within a target refrigeration efficiency range.

Specifically, when the cooling power does not meet the cooling power condition, it means that the cooling power at this time is too low or the heat leak power is too high, and it is necessary to increase the cooling power by increasing the input current. However, as shown in fig. 6, if the input current is too large, the cooling efficiency is lowered, and therefore, when the first temperature difference is a constant value, the optimum input current at that time can be found from the cooling efficiency table. The optimal input current is the maximum effective input current, which is preset current, so that the input current has higher refrigeration efficiency under the condition of not excessively high input current.

Step 10210, adjusting the input current of the refrigerator to the maximum effective input current to increase the refrigeration power of the refrigerator.

As shown in fig. 6, icmax is the maximum effective input current, and the refrigeration efficiency is high at this time, and the refrigeration power can also be increased.

By setting the maximum effective input current, the embodiment can increase the refrigeration power when the current refrigeration power does not meet the refrigeration power condition, and can maintain the refrigeration efficiency within an acceptable range, thereby being beneficial to improving the refrigeration effect of the refrigeration equipment.

In some alternative implementations of the present embodiment, step 10207 may be performed as follows:

First, it is determined whether the current cooling power is greater than or equal to a preset heat leakage power and minimum cooling power.

The heat leakage power can be obtained by actual measurement after the performance parameters of the refrigerating equipment (such as the maximum difference between the temperature control range of the refrigerating space and the working ring temperature) are determined.

In addition, in order to secure the basic cooling function of the refrigerator, the minimum cooling power Qmin may be set.

And then, if the current refrigeration power is larger than or equal to the heat leakage power and the lowest refrigeration power, determining that the current refrigeration power meets the refrigeration power condition.

In particular, in an ideal adiabatic system, the input current can be dynamically adjusted according to the above-mentioned first temperature difference of the refrigerator, so that it is always close to Ip, and the maximum refrigeration efficiency can be obtained. However, in a practical scenario, there is not a complete insulation system, and there is always a spontaneous heat transfer between the cold and hot ends, which is defined herein as heat leakage power Qz. Qz is positively correlated with the first temperature difference and negatively correlated with the thermal resistance between the hot and cold ends, and therefore, it is necessary to ensure that the cooling power corresponding to Ip is equal to or higher than Qz. When the current refrigeration power Qc is greater than or equal to Qz and Qmin, it can be determined that the refrigeration power condition is met, and at this time, the refrigerator can be controlled to operate at a current Ip corresponding to the maximum refrigeration efficiency COP.

The embodiment sets the refrigerating power condition by setting the heat leakage power and the lowest refrigerating power, can ensure the refrigerating capacity of the refrigerator during working, is beneficial to enabling the refrigerating efficiency of the refrigerator to be as high as possible, and further improves the refrigerating effect of the refrigerating equipment.

In some alternative implementations of the present embodiment, the refrigeration appliance includes a heat exchanger including a warm side heat exchanger, and the heat sink side temperature data includes a second warm side temperature of the warm side heat exchanger. The hot end heat exchanger is used for enabling the hot end of the refrigerator to exchange heat with the outside, so that the purpose of cooling the hot end of the refrigerator is achieved. The second hot side temperature may be a temperature collected by a temperature sensor disposed on the hot side heat exchanger. As shown in fig. 7, which shows a schematic diagram of the heat exchanger and the refrigerator, the hot side heat exchanger 702 contacts the hot side of the refrigerator 701 to diffuse heat generated from the hot side of the refrigerator to the outside. In general, the hot side heat exchanger includes a radiator 7021 and a hot side fan 7022, the radiator 7021 absorbs heat generated from the hot side of the refrigerator, and the hot side fan 7022 may flow air around the hot side heat exchanger to diffuse the heat to the outside.

As shown in fig. 8, step 102 includes:

step 10211, collecting the ambient temperature of the space in which the refrigeration equipment is located.

Wherein, the ambient temperature can be acquired by a temperature sensor arranged in the space where the refrigeration equipment is located. For example, when the refrigerating apparatus is provided on a refrigerator, a temperature sensor may be provided on a cabinet of the refrigerator for collecting an ambient temperature in a room in which the refrigerator is placed.

Step 10212, determining an on temperature of the hot side heat exchanger based on the ambient temperature.

The corresponding relationship between the ambient temperature and the opening temperature can be represented by a table, a calculation formula and the like. As an example, the ambient temperature may be divided into a plurality of intervals, and the same interval may correspond to the same on temperature. For example, the ambient temperature is in the range of 11 ℃ to 15 ℃, at which time the ambient temperature is conducive to heat dissipation, and the corresponding opening temperature may be 35 ℃; the ambient temperature is in the range of 16-20 ℃, at this time, the ambient temperature is unfavorable for heat dissipation, and the corresponding opening temperature can be reduced to 30 ℃.

In step 10213, in response to determining that the second hot side temperature exceeds the turn-on temperature, it is determined that the refrigeration appliance is currently in compliance with the refrigeration efficiency optimization condition.

When the temperature of the second hot end exceeds the opening temperature, the heat dissipation function of the hot end heat exchanger needs to be enhanced, at the moment, the refrigeration efficiency optimization condition is met, and the heat dissipation capacity is increased by means of the follow-up opening of the hot end fan and the like.

Optionally, if the second hot side temperature does not exceed the opening temperature, the active heat exchange function of the hot side heat exchanger (for example, the hot side fan is turned off) may be turned off, and the radiator is used to radiate heat.

According to the embodiment, the second hot end temperature and the ambient temperature of the hot end heat exchanger are collected, whether the cooling efficiency optimization condition is met or not is judged according to the ambient temperature, so that the heat dissipation capacity of the hot end heat exchanger can be adjusted dynamically, the hot end temperature of the refrigerator can be reduced when the ambient temperature is high, and the cooling efficiency of the refrigerator can be improved.

In some alternative implementations of the present embodiment, as shown in fig. 8, the step 103 includes:

step 10304, determining the hot side heat exchanger as a target control object.

Step 104 comprises:

in step 10408, the hot side heat exchanger is controlled to perform active heat exchange to reduce the temperature of the second hot side.

Optionally, the operating power of the hot side fan included in the hot side heat exchanger may be controlled by using a PI algorithm, a PID algorithm, or the like, so that the second hot side temperature is reduced to a target temperature, where the target temperature may be the above-mentioned opening temperature or other temperatures that are set.

According to the embodiment, the hot end heat exchanger is controlled to perform heat exchange under the condition that the temperature of the second hot end exceeds the opening temperature, so that the temperature of the hot end of the refrigerator can be timely reduced, the temperature difference between the cold end and the hot end of the refrigerator is reduced, and the refrigeration efficiency of the refrigerator is improved.

In some alternative implementations of the present embodiment, step 10212 may be performed as follows:

first, a preset offset temperature corresponding to the ambient temperature is determined.

As an example, let the ambient temperature be Te, if Te is less than or equal to Te1, the offset temperature t_offset is a;

if Te1 is less than Te and equal to Te2, the offset temperature T_offset is b;

if Te2 is less than Te and less than Te3, the offset temperature T_offset is c;

if Te > Te3, the offset temperature T_offset is d;

wherein Te1< Te2< Te3, a > b > c > d >0.

Then, the sum of the ambient temperature and the offset temperature is determined as the open temperature of the hot side heat exchanger.

I.e. the current on temperature is Te + T _ offset.

According to the embodiment, by setting the offset temperature corresponding to the ambient temperature, the opening temperature of the hot-end heat exchanger can be correspondingly set under different ambient temperatures, so that the hot-end heat exchanger can pertinently dissipate heat of the hot end of the refrigerator based on the ambient temperature, the refrigeration efficiency of the refrigerator is further improved, an active heat exchange function of the hot-end heat exchanger is not required to be continuously started, and the power consumption of refrigeration equipment is reduced.

In some alternative implementations of the present embodiment, the heat exchanger comprises a cold side heat exchanger and the refrigeration side temperature data comprises a second cold side temperature of the cold side heat exchanger. The cold end heat exchanger is used for enabling the cold end of the refrigerator to exchange heat with the refrigerating space, so that the purpose of cooling the refrigerating space is achieved. The second cold end temperature may be a temperature sensed by a temperature sensor disposed on the cold end heat exchanger. As shown in fig. 7, the cold side heat exchanger 703 contacts the cold side of the refrigerator 701 to absorb heat around the cold side heat exchanger, thereby cooling the refrigerating space. In general, the cold side heat exchanger 703 includes a heat absorber 7031 and a cold side fan 7032, where the heat absorber 7031 absorbs heat in the refrigeration space and the cold side fan 7032 can generate a flow of air around the cold side heat exchanger to facilitate reducing the ambient temperature.

As shown in fig. 9, step 102 further includes:

step 10213, collecting the space temperature of the refrigerating space aimed by the refrigerating equipment.

Wherein the space temperature may be a temperature collected by a temperature sensor provided in the cooling space.

Step 10214, determining whether the second temperature difference between the space temperature and the second cold end temperature exceeds a third preset temperature difference.

Step 10215, if the third preset temperature difference is exceeded, determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition.

When the second temperature difference exceeds a third preset temperature difference, namely, a larger temperature difference exists between the temperature in the refrigerating space and the temperature of the cold-end heat exchanger, the heat absorption capacity of the cold-end heat exchanger needs to be enhanced at the moment, the temperature in the refrigerating space is reduced as soon as possible, the refrigerating efficiency optimization condition is met, and the heat absorption capacity is increased by means of subsequent opening of the cold-end fan and the like.

Optionally, if the second temperature difference does not exceed the third preset temperature difference, the temperature difference between the temperature in the refrigeration space and the temperature of the cold-end heat exchanger is smaller, or the temperature difference is not present, or the temperature difference is negative, at this time, the active heat exchange function of the cold-end heat exchanger (for example, the cold-end fan is turned off), and the heat absorber is used for heat exchange.

According to the embodiment, whether the refrigerating efficiency optimization condition is met or not is determined according to the comparison result by comparing the second temperature difference with the third preset temperature difference, the heat absorption capacity of the cold-end heat exchanger is dynamically adjusted, the heat exchange capacity between the cold-end of the refrigerator and the cold-end heat exchanger is further improved when the temperature of a refrigerating space is higher, the phenomenon that the temperature of the cold-end of the refrigerator is too low due to untimely heat exchange and the frosting risk caused by the too low temperature is avoided, and the refrigerating efficiency of the refrigerator is further improved.

In some optional implementations of the present embodiment, as shown in fig. 9, the step 103 includes:

step 10305, determining the cold side heat exchanger as the target control object.

Step 104 comprises:

in step 10409, a current target operating power of the cold side heat exchanger is determined based on the correspondence between the second temperature difference and the operating power of the cold side heat exchanger.

The operation power of the cold-end heat exchanger, that is, the power consumed by the cold-end heat exchanger when performing active heat exchange, may be, for example, the operation power of the cold-end fan.

The correspondence between the second temperature difference and the operating power of the cold-side heat exchanger can be represented by a table, a calculation formula, or the like.

As an example, the third preset temperature difference may have a plurality of values, and the plurality of values may determine a plurality of temperature intervals, where each temperature interval corresponds to one operating power.

And setting the space temperature of the refrigerating space as Tb, the temperature of the second cold end as T_qcool, and the third preset temperature difference comprises Tx1 and Tx2.

If Tb-T_qcool is more than or equal to Tx1, the target running power is P1;

if Tx1 is more than Tb-T_qcool is more than or equal to Tx2, the target running power is P2;

if Tx2 > Tb-T_qcool > 0, the target running power is P3;

wherein Tx1 > Tx2 > 0, P1 > P2 > P3.

Step 10410, adjusting the operating power of the cold side heat exchanger to a target operating power.

Since the cold-end heat exchanger performs active heat exchange through the cold-end blower, the operating power of the cold-end heat exchanger can be adjusted by adjusting the duty ratios of the driving signals respectively corresponding to P1, P2 and P3.

Alternatively, if Tb-T_qcool is less than or equal to 0, the active heat exchange function of the cold side heat exchanger may be turned off.

According to the embodiment, the target operation power of the cold-end heat exchanger is determined according to the real-time second temperature difference by setting the corresponding relation between the second temperature difference and the operation power of the cold-end heat exchanger, so that the heat exchange capacity of the cold-end heat exchanger is adjusted in a targeted manner, the temperature of a refrigerating space and the cold-end temperature of a refrigerator are maintained within a smaller temperature difference range, the phenomenon that the temperature of the cold end of the refrigerator is too low due to untimely heat exchange and the frosting risk caused by the too low temperature are avoided, and further the refrigerating efficiency of the refrigerator is improved.

Optionally, when the ambient temperature of the refrigeration device is low, so that refrigeration of the refrigeration space is not needed, that is, when the input current of the refrigerator is turned off, the active heat exchange function of the cold-end heat exchanger (for example, the cold-end fan is turned off), so that the cold end of the refrigerator keeps a low temperature, and the refrigeration power of the refrigerator is reduced when the refrigeration function is turned on again. Meanwhile, if the active heat exchange function of the hot side heat exchanger is in an on state (for example, the hot side fan is in an on state), the active heat exchange function of the hot side heat exchanger may be turned off for a period of time (for example, 2 minutes). And the unstable temperature of the refrigerating space caused by the fact that the cold end temperature is pulled up by the hot end due to the active heat exchange function of immediately closing the heat exchanger is avoided.

Fig. 10 is a schematic structural diagram of a control device for a refrigeration apparatus according to an embodiment of the present application. The method specifically comprises the following steps: the acquisition module 1001 is configured to acquire current refrigeration side temperature data and heat dissipation side temperature data of the refrigeration device; a first determining module 1002, configured to determine, based on the refrigeration side temperature data and the heat dissipation side temperature data, whether the refrigeration device currently meets a refrigeration efficiency optimization condition; a second determining module 1003, configured to determine a target control object of the refrigeration equipment if the refrigeration efficiency optimization condition is met; the first adjusting module 1004 is configured to adjust a control parameter of the target control object based on a correspondence between an operating state of the target control object and a cooling efficiency, so that the operating state of the target control object is adjusted to a target state, where the target state of the target control object is used to improve the cooling efficiency of the cooling device.

In one possible embodiment, the refrigeration appliance includes a chiller, the refrigeration side temperature data includes a first cold side temperature of the chiller, and the heat sink side temperature data includes a first hot side temperature of the chiller; the first determining module 1002 includes: the first determining unit is used for determining a first temperature difference between the first hot end temperature and the first cold end temperature and continuous working time of the refrigerator; the second determining unit is used for determining the current defrosting interval time; the third determining unit is used for determining whether the temperature of the first cold end is smaller than or equal to a preset defrosting temperature, whether the continuous working time exceeds the defrosting interval time and whether the first temperature difference exceeds the maximum allowable temperature difference; and the fourth determining unit is used for determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition if the temperature of the first cold end is smaller than or equal to the defrosting temperature, the continuous working time exceeds the defrosting interval time, and the first temperature difference does not exceed the maximum allowable temperature difference.

In one possible implementation, the second determining module 1003 includes: a fifth determining unit for determining an input current of the refrigerator as a target control object; the first adjustment module 1004 includes: a first cut-off unit for cutting off an input current of the refrigerator to reduce a first temperature difference; the first control unit is used for controlling the refrigerator to operate at rated reverse current so as to increase the temperature of the first cold end in response to the fact that the first temperature difference is smaller than or equal to a first preset temperature difference; and the second cutting-off unit is used for cutting off rated reverse current in response to the fact that the temperature of the first cold end reaches the preset defrosting exit temperature, setting the continuous working time as an initial value and recording the continuous working time again.

In one possible embodiment, the refrigeration appliance further comprises a heat exchanger comprising a cold side heat exchanger and a hot side heat exchanger; the second determining module 1003 includes: a sixth determining unit, configured to determine the cold-side heat exchanger and the hot-side heat exchanger as target control objects; the first adjustment module 1004 includes: the second control unit is used for controlling the cold-end heat exchanger and the hot-end heat exchanger to stop running in response to the fact that the refrigerator is currently running at rated reverse current or the current input current of the refrigerator is zero and the operation of the refrigerator is finished at rated reverse current; and the third control unit is used for controlling the cold-end heat exchanger to stop running and controlling the hot-end heat exchanger to continue running in response to the fact that the current input current of the refrigerator is zero and the refrigerator does not run at the rated reverse current.

In one possible embodiment, the apparatus further comprises: the third determining module is used for determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition in response to determining that the first temperature difference is larger than or equal to a preset maximum allowable temperature difference; the second determining module 1003 includes: a seventh determining unit configured to determine an input current of the refrigerator as a target control object; the first adjustment module 1004 includes: a third cutoff unit for cutting off an input current of the refrigerator to reduce the first temperature difference; and the recovery unit is used for responding to the first temperature difference to be reduced to a second preset temperature difference and recovering the input current.

In one possible embodiment, the second determining unit includes: the first determining subunit is used for determining the current humidity of the refrigerating space aimed by the refrigerating equipment and acquiring the preset reference humidity of the refrigerating space; the second determining subunit is used for determining the humidity difference between the current humidity and the preset reference humidity and determining the current defrosting interval time reduction based on the corresponding relation between the humidity difference and the defrosting interval time increment; and a third determining subunit, configured to determine a current defrosting interval time based on the preset initial defrosting interval time and the current defrosting interval time reduction amount.

In one possible embodiment, the apparatus further comprises: the first searching module is used for searching a target input current corresponding to a first temperature difference from a preset refrigeration efficiency table if the continuous working time does not exceed the defrosting interval time, wherein the target input current is the input current corresponding to the highest refrigeration efficiency of the refrigerator under the first temperature difference; a fourth determining module, configured to determine a current refrigeration power of the refrigerator, and determine whether the current refrigeration power meets a preset refrigeration power condition; and the control module is used for controlling the input current of the refrigerator to the target input current if the refrigerating power condition is met.

In one possible embodiment, the apparatus further comprises: the second searching module is used for searching the maximum effective input current corresponding to the first temperature difference from the refrigerating efficiency table if the current refrigerating power does not accord with the refrigerating power condition, wherein the maximum effective input current is the maximum input current which enables the refrigerating efficiency of the refrigerator to be in the target refrigerating efficiency range; and the second adjusting module is used for adjusting the input current of the refrigerator to the maximum effective input current so as to increase the refrigeration power of the refrigerator.

In one possible implementation, the fourth determining module includes: an eighth determining unit for determining whether the current cooling power is greater than or equal to a preset heat leakage power and a minimum cooling power; and the ninth determining unit is used for determining that the current refrigeration power meets the refrigeration power condition if the current refrigeration power is larger than or equal to the heat leakage power and the lowest refrigeration power.

In one possible embodiment, the refrigeration appliance includes a heat exchanger including a warm side heat exchanger, and the heat sink side temperature data includes a second warm side temperature of the warm side heat exchanger; the first determining module 1002 includes: the first acquisition unit is used for acquiring the ambient temperature of the space where the refrigeration equipment is located; a tenth determining unit for determining an opening temperature of the hot side heat exchanger based on the ambient temperature; and the eleventh determining unit is used for determining that the refrigeration equipment currently meets the refrigeration efficiency optimizing condition in response to determining that the temperature of the second hot end exceeds the opening temperature.

In one possible implementation, the second determining module 1003 includes: a twelfth determining unit for determining the hot side heat exchanger as a target control object; the first adjustment module 1004 includes: and the fourth control unit is used for controlling the hot end heat exchanger to perform active heat exchange so as to reduce the temperature of the second hot end.

In one possible embodiment, the tenth determining unit includes: a fourth determining subunit, configured to determine a preset offset temperature corresponding to the ambient temperature; and a fifth determining subunit for determining the sum of the ambient temperature and the offset temperature as the opening temperature of the hot-side heat exchanger.

In one possible embodiment, the heat exchanger comprises a cold side heat exchanger and the refrigeration side temperature data comprises a second cold side temperature of the cold side heat exchanger; the first determination module 1002 further includes: the second acquisition unit is used for acquiring the space temperature of the refrigerating space aimed by the refrigerating equipment; a thirteenth determining unit, configured to determine whether a second temperature difference between the space temperature and the second cold end temperature exceeds a third preset temperature difference; and the fourteenth determining unit is used for determining that the refrigeration equipment currently meets the refrigeration efficiency optimizing condition if the third preset temperature difference is exceeded.

In one possible implementation, the second determining module 1003 includes: a fifteenth determining unit for determining the cold-end heat exchanger as a target control object; the first adjustment module 1004 includes: a sixteenth determining unit, configured to determine a current target operating power of the cold-side heat exchanger based on a correspondence between the second temperature difference and the operating power of the cold-side heat exchanger; and the adjusting unit is used for adjusting the operating power of the cold-end heat exchanger to the target operating power.

The refrigeration device control apparatus provided in this embodiment may be a refrigeration device control apparatus as shown in fig. 10, and may perform all the steps of the above refrigeration device control methods, so as to achieve the technical effects of the above refrigeration device control methods, and specific reference is made to the above related description, which is omitted herein for brevity.

Fig. 11 is a schematic structural diagram of an electric device according to an embodiment of the present application, where the electric device may be various devices with a refrigeration function, such as a refrigerator, a freezer, an air conditioner, and the like. The powered device 1100 shown in fig. 11 includes: at least one processor 1101, memory 1102, a refrigeration device 1104, and other user interface 1103. The various components in powered device 1100 are coupled together by bus system 1105. It is appreciated that bus system 1105 is used to implement the connected communications between these components. The bus system 1105 includes a power bus, a control bus, and a status signal bus in addition to a data bus. But for clarity of illustration, the various buses are labeled as bus system 1105 in fig. 11.

The refrigeration device 1104 may include a refrigerator, a heat exchanger, and the like, among others. The cooling device 1104 may receive various control instructions from the bus system 1105 sent by the processor 1101 to control a refrigerator, a heat exchanger, or the like to perform cooling operations.

The user interface 1103 may include a display, keyboard, or pointing device (e.g., mouse, trackball, touch pad, or touch screen, among others).

It is to be appreciated that memory 1102 in embodiments of the present application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The nonvolatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable EPROM (EEPROM), or a flash Memory. The volatile memory may be random access memory (Random Access Memory, RAM) which acts as an external cache. By way of example, and not limitation, many forms of RAM are available, such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (Double Data Rate SDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), and Direct memory bus RAM (DRRAM). The memory 1102 described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some implementations, the memory 1102 stores the following elements, executable units or data structures, or a subset thereof, or an extended set thereof: an operating system 11021 and application programs 11022.

The operating system 11021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application programs 11022 include various application programs such as a Media Player (Media Player), a Browser (Browser), and the like for realizing various application services. A program for implementing the method of the embodiment of the present application may be included in the application program 11022.

In this embodiment, by calling a program or an instruction stored in the memory 1102, specifically, a program or an instruction stored in the application 11022, the processor 1101 is configured to execute the method steps provided by the method embodiments, for example, including: collecting current refrigeration side temperature data and heat dissipation side temperature data of refrigeration equipment; determining whether the refrigeration equipment currently meets refrigeration efficiency optimization conditions or not based on the refrigeration side temperature data and the heat radiation side temperature data; if the refrigeration efficiency optimization condition is met, determining a target control object of the refrigeration equipment; and adjusting control parameters of the target control object based on the corresponding relation between the working state of the target control object and the refrigerating efficiency, so that the working state of the target control object is adjusted to be a target state, wherein the target state of the target control object is used for improving the refrigerating efficiency of the refrigerating equipment.

The method disclosed in the embodiments of the present application may be applied to the processor 1101 or implemented by the processor 1101. The processor 1101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuitry in hardware in the processor 1101 or instructions in software. The processor 1101 described above may be a general purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be embodied directly in hardware, in a decoded processor, or in a combination of hardware and software elements in a decoded processor. The software elements may be located in a random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 1102, and the processor 1101 reads information in the memory 1102 and performs the steps of the method in combination with its hardware.

It is to be understood that the embodiments described herein may be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For a hardware implementation, the processing units may be implemented within one or more application specific integrated circuits (Application Specific Integrated Circuits, ASIC), digital signal processors (Digital Signal Processing, DSP), digital signal processing devices (dspev, DSPD), programmable logic devices (Programmable Logic Device, PLD), field programmable gate arrays (Field-Programmable Gate Array, FPGA), general purpose processors, controllers, microcontrollers, microprocessors, other electronic units configured to perform the above-described functions of the application, or a combination thereof.

For a software implementation, the techniques described herein may be implemented by means of units that perform the functions described herein. The software codes may be stored in a memory and executed by a processor. The memory may be implemented within the processor or external to the processor.

The electric device provided in this embodiment may be an electric device as shown in fig. 8, and all the steps of the above-described control method of each refrigeration device may be executed, so as to achieve the technical effects of the above-described control method of each refrigeration device, and specific reference is made to the above-described related description, which is omitted herein for brevity.

The embodiment of the application also provides a storage medium (computer readable storage medium). The storage medium here stores one or more programs. Wherein the storage medium may comprise volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid state disk; the memory may also comprise a combination of the above types of memories.

When one or more programs in the storage medium are executable by one or more processors, the refrigeration equipment control method executed on the consumer side is realized.

The above processor is configured to execute a program stored in the memory, so as to implement the following steps of the refrigeration equipment control method executed on the consumer side: collecting current refrigeration side temperature data and heat dissipation side temperature data of refrigeration equipment; determining whether the refrigeration equipment currently meets refrigeration efficiency optimization conditions or not based on the refrigeration side temperature data and the heat radiation side temperature data; if the refrigeration efficiency optimization condition is met, determining a target control object of the refrigeration equipment; and adjusting control parameters of the target control object based on the corresponding relation between the working state of the target control object and the refrigerating efficiency, so that the working state of the target control object is adjusted to be a target state, wherein the target state of the target control object is used for improving the refrigerating efficiency of the refrigerating equipment.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of function in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different circuitry for each particular application, but such implementation should not be considered to be beyond the scope of this application.

The steps of a circuit or algorithm described in connection with the embodiments disclosed herein may be embodied in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," "including," and "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and/or groups thereof. The circuit steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be appreciated that additional or alternative steps may be used.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of controlling a refrigeration appliance, the method comprising:

collecting current refrigeration side temperature data and heat dissipation side temperature data of refrigeration equipment;

determining whether the refrigeration equipment currently meets refrigeration efficiency optimization conditions or not based on the refrigeration side temperature data and the heat radiation side temperature data;

if the refrigerating efficiency optimization condition is met, determining a target control object of the refrigerating equipment;

and adjusting control parameters of the target control object based on the corresponding relation between the working state of the target control object and the refrigerating efficiency to adjust the working state of the target control object to a target state, wherein the target state of the target control object is used for improving the refrigerating efficiency of the refrigerating equipment.

2. The method of claim 1, wherein the refrigeration appliance comprises a chiller, the refrigeration side temperature data comprises a first cold side temperature of the chiller, and the heat sink side temperature data comprises a first hot side temperature of the chiller; and

the determining whether the refrigeration equipment currently meets the refrigeration efficiency optimization condition based on the refrigeration side temperature data and the heat radiation side temperature data comprises the following steps:

determining a first temperature difference between the first hot end temperature and the first cold end temperature, and a continuous working time of the refrigerator;

determining the current defrosting interval time;

determining whether the first cold end temperature is less than or equal to a preset defrosting temperature, whether the continuous working time exceeds the defrosting interval time, and whether the first temperature difference exceeds a maximum allowable temperature difference;

if the first cold end temperature is smaller than or equal to the defrosting temperature, the continuous working time exceeds the defrosting interval time, the first temperature difference does not exceed the maximum allowable temperature difference, and it is determined that the refrigeration equipment currently meets the refrigeration efficiency optimization condition.

3. The method of claim 2, wherein the determining the target control object of the refrigeration appliance comprises:

Determining the input current of the refrigerator as the target control object; and

the adjusting the control parameter of the target control object to adjust the working state of the target control object to a target state includes:

switching off the input current of the refrigerator to reduce the first temperature difference;

controlling the refrigerator to operate at rated reverse current to increase the first cold end temperature in response to determining that the first temperature difference is less than or equal to a first preset temperature difference;

and responding to the first cold end temperature reaching a preset defrosting exit temperature, cutting off the rated reverse current, setting the continuous working time as an initial value and recording the continuous working time again.

4. The method of claim 3, wherein the refrigeration unit further comprises a heat exchanger comprising a cold side heat exchanger and a hot side heat exchanger; and

the determining the target control object of the refrigeration equipment comprises the following steps:

determining the cold-end heat exchanger and the hot-end heat exchanger as the target control objects; and

Controlling the cold side heat exchanger and the hot side heat exchanger to stop running in response to the refrigerator currently running at the rated reverse current or the refrigerator currently inputting current being zero and ending running at the rated reverse current;

and controlling the cold end heat exchanger to stop running and controlling the hot end heat exchanger to continue running in response to the fact that the current input current of the refrigerator is zero and the refrigerator does not run at the rated reverse current.

5. The method of claim 2, wherein after said determining the first difference in the first hot side temperature and the first cold side temperature, the method further comprises:

in response to determining that the first temperature difference is greater than or equal to a preset maximum allowable temperature difference, determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition; and

And restoring the input current in response to the first temperature difference decreasing to a second preset temperature difference.

6. The method of claim 2, wherein the determining the current defrosting interval time comprises:

determining the current humidity of a refrigerating space aimed by the refrigerating equipment, and acquiring the preset reference humidity of the refrigerating space;

determining a humidity difference between the current humidity and the preset reference humidity, and determining a current defrosting interval time reduction based on a corresponding relation between the humidity difference and a defrosting interval time increment;

and determining the current defrosting interval time based on the preset initial defrosting interval time and the current defrosting interval time reduction.

7. The method of claim 2, wherein after said determining whether said first cold end temperature is less than or equal to a preset defrost temperature and said continuous operation time exceeds said defrost interval time, said method further comprises:

if the continuous working time does not exceed the defrosting interval time, searching a target input current corresponding to the first temperature difference from a preset refrigeration efficiency table, wherein the target input current is the input current corresponding to the highest refrigeration efficiency of the refrigerator under the first temperature difference;

Determining the current refrigeration power of the refrigerator, and determining whether the current refrigeration power meets preset refrigeration power conditions;

and if the refrigerating power condition is met, controlling the input current of the refrigerator to the target input current.

8. The method of claim 7, wherein after said determining whether the current cooling power meets a preset cooling power condition, the method further comprises:

if the current refrigeration power does not meet the refrigeration power condition, searching the maximum effective input current corresponding to the first temperature difference from the refrigeration efficiency table, wherein the maximum effective input current is the maximum input current which enables the refrigeration efficiency of the refrigerator to be in a target refrigeration efficiency range;

and adjusting the input current of the refrigerator to the maximum effective input current so as to increase the refrigeration power of the refrigerator.

9. The method of claim 7, wherein determining whether the current cooling power meets a preset cooling power condition comprises:

determining whether the current refrigeration power is greater than or equal to a preset heat leakage power and a minimum refrigeration power;

And if the current refrigeration power is larger than or equal to the heat leakage power and the lowest refrigeration power, determining that the current refrigeration power meets the refrigeration power condition.

10. The method of any of claims 1-9, wherein the refrigeration appliance comprises a heat exchanger, the heat exchanger comprising a warm side heat exchanger, the heat sink side temperature data comprising a second warm side temperature of the warm side heat exchanger; and

collecting the ambient temperature of the space in which the refrigeration equipment is located;

determining an opening temperature of the hot side heat exchanger based on the ambient temperature;

and in response to determining that the second hot side temperature exceeds the starting temperature, determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition.

11. The method of claim 10, wherein the determining the target control object of the refrigeration appliance comprises:

determining the hot-end heat exchanger as the target control object; and

And controlling the hot end heat exchanger to perform active heat exchange so as to reduce the temperature of the second hot end.

12. The method of claim 10, wherein the determining the on-temperature of the hot side heat exchanger based on the ambient temperature comprises:

determining a preset offset temperature corresponding to the ambient temperature;

and determining the sum of the ambient temperature and the offset temperature as the opening temperature of the hot-end heat exchanger.

13. The method of claim 10 wherein the heat exchanger comprises a cold side heat exchanger and the refrigeration side temperature data comprises a second cold side temperature of the cold side heat exchanger;

the determining whether the refrigeration equipment currently meets the refrigeration efficiency optimization condition based on the refrigeration side temperature data and the heat radiation side temperature data further comprises:

collecting the space temperature of a refrigerating space aimed by the refrigerating equipment;

determining whether a second temperature difference between the space temperature and the second cold end temperature exceeds a third preset temperature difference;

and if the third preset temperature difference is exceeded, determining that the refrigeration equipment currently meets the refrigeration efficiency optimization condition.

14. The method of claim 13, wherein the determining the target control object of the refrigeration appliance comprises:

Determining the cold-end heat exchanger as the target control object; and

determining the current target operating power of the cold-end heat exchanger based on the corresponding relation between the second temperature difference and the operating power of the cold-end heat exchanger;

and adjusting the operating power of the cold-end heat exchanger to the target operating power.

15. A refrigeration appliance control apparatus, the apparatus comprising:

the acquisition module is used for acquiring the current refrigeration side temperature data and the heat dissipation side temperature data of the refrigeration equipment;

the first determining module is used for determining whether the refrigeration equipment currently meets the refrigeration efficiency optimizing condition or not based on the refrigeration side temperature data and the heat radiation side temperature data;

the second determining module is used for determining a target control object of the refrigeration equipment if the refrigeration efficiency optimization condition is met;

the first adjusting module is used for adjusting the control parameters of the target control object based on the corresponding relation between the working state of the target control object and the refrigerating efficiency, so that the working state of the target control object is adjusted to the target state, wherein the target state of the target control object is used for improving the refrigerating efficiency of the refrigerating equipment.

16. A powered device, comprising:

a memory for storing a computer program;

a processor for executing a computer program stored in said memory, and which, when executed, implements the method of any of the preceding claims 1-14;

and the refrigeration equipment is used for receiving the control parameters output by the processor and adjusting the working state of the target control object to the target state.

17. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of any of the preceding claims 1-14.