CN113834281A

CN113834281A - Defrosting control method and device and refrigerator

Info

Publication number: CN113834281A
Application number: CN202111124410.3A
Authority: CN
Inventors: 黄扬杰; 李琦; 辛海亚; 陈艳君
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2021-12-24

Abstract

The invention discloses a defrosting control method and device and a refrigerator. Wherein, the method comprises the following steps: in the defrosting process, the temperatures of at least two random position points on an evaporator are obtained within a preset time; calculating an average value of the temperatures of the at least two random position points; and if the average value is greater than the preset temperature, the defrosting is stopped. According to the invention, through collecting random single-point temperature on the evaporator in the defrosting process, a representative temperature sample is formed in the preset time, the average value of the evaporator temperature in the preset time is calculated, and the average value is compared with the preset defrosting quitting temperature, so that whether the defrosting quitting condition is met or not is judged, the defrosting quitting is controlled, the defrosting condition of the whole defrosting layer of the evaporator can be effectively observed, the defrosting quitting is reasonably controlled, and the problem that the defrosting layer on the evaporator has residues in the defrosting process in the prior art is solved.

Description

Defrosting control method and device and refrigerator

Technical Field

The invention relates to the technical field of defrosting, in particular to a defrosting control method and device and a refrigerator.

Background

In the operation process of the air-cooled refrigerator, the air-cooled refrigerator can be defrosted periodically, and most of the existing defrosting technologies are that a defrosting temperature sensor is arranged at a certain fixed position of an evaporator so as to control the start and the end of defrosting. However, since only a single point of temperature value can be detected, there may be a case where frost is not completely removed from other locations, which may affect the cooling efficiency.

Other defrosting schemes are available, for example, in which the temperature and humidity around the evaporator are detected by temperature and humidity sensors, and the detected values are compared with preset values to control the on/off of the defrosting heater. However, this method can only detect a small range of temperature and humidity values, and when the detected value reaches a preset value, there is still a high probability that a residual frost layer is left on the evaporator. In another example, the frost layer thickness on the evaporator is detected by infrared rays, and the on-off of the defrosting heater is inferred. However, in this method, since there may be reflection of infrared rays on the frost layer, the thickness of the frost layer cannot be measured accurately, and thus, a significant error is generated.

Aiming at the problem that the frost layer on the evaporator is remained during defrosting in the prior art, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the invention provides a defrosting control method and device and a refrigerator, which at least solve the problem that a frost layer on an evaporator is remained during defrosting in the prior art.

In order to solve the technical problem, an embodiment of the present invention provides a defrosting control method, including: in the defrosting process, the temperatures of at least two random position points on an evaporator are obtained within a preset time; calculating an average value of the temperatures of the at least two random position points; and if the average value is greater than the preset temperature, the defrosting is stopped.

Optionally, acquiring the temperatures of at least two random points on the evaporator within a preset time includes: determining a random location point on the evaporator; collecting the temperature of the random position points; and after the time interval is set, determining a new random position point again, collecting the temperature of the new random position point, and circulating the steps until the preset time is reached.

Optionally, determining a random location point on the evaporator comprises: abstracting the area where the evaporator is located into a three-dimensional space, and determining the coordinate range of the evaporator according to the boundary position of the evaporator; and randomly determining a coordinate in the coordinate range of the evaporator as the random position point.

Optionally, acquiring the temperature of the random position point includes: and acquiring the temperature of the random position point by using an infrared temperature sensor, wherein the infrared temperature sensor is separated from the evaporator by a preset distance.

Optionally, the infrared temperature sensor is mounted on a surface of the side of the refrigeration mask facing the evaporator.

Optionally, after calculating an average value of the temperatures of the at least two random position points, the method further includes: if the average value is less than or equal to the preset temperature, after a time interval is set, returning to the step of acquiring the temperatures of at least two random position points on the evaporator within the preset time so as to judge whether defrosting is quitted again.

An embodiment of the present invention further provides a defrosting control device, including: the defrosting control device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the temperatures of at least two random position points on an evaporator within preset time in the defrosting process; the calculation module is used for calculating the average value of the temperatures of the at least two random position points; and the control module is used for exiting defrosting if the average value is greater than the preset temperature.

An embodiment of the present invention further provides a refrigerator, including: the embodiment of the invention provides a defrosting control device.

An embodiment of the present invention further provides a computer device, including: the device comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment of the invention.

Embodiments of the present invention also provide a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method according to the embodiments of the present invention.

By applying the technical scheme of the invention, a representative temperature sample is formed in the preset time by collecting the random single-point temperature on the evaporator in the defrosting process, the average value of the evaporator temperature in the preset time is calculated, and the average value is compared with the preset defrosting exit temperature to judge whether the defrosting exit condition is met, so that the defrosting exit is controlled, the integral defrosting condition of the evaporator can be effectively observed, the defrosting exit is reasonably controlled, and the problem that the defrosting layer on the evaporator has residues in the defrosting process in the prior art is solved.

Drawings

Fig. 1 is a flowchart of a defrosting control method according to an embodiment of the present invention;

FIG. 2 is a schematic three-dimensional space diagram of an evaporator area provided by an embodiment of the invention;

FIG. 3 is a flow chart of defrosting control provided in the second embodiment of the present invention;

fig. 4 is a block diagram of a defrosting control device according to a third embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "comprises" and "comprising," and any variations thereof, in the description and claims of this invention and the accompanying drawings are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.

Example one

Fig. 1 is a flowchart of a defrosting control method according to an embodiment of the present invention, and as shown in fig. 1, the method includes the following steps:

s101, acquiring the temperatures of at least two random positions on an evaporator within preset time in the defrosting process.

S102, calculating the average value of the temperatures of at least two random position points.

And S103, if the average value is greater than the preset temperature, the defrosting is stopped.

The temperatures of at least two random position points in the preset time are equivalent to the temperature acquired instantaneously for many times in a period of time to form a representative temperature set, and according to the principle of statistical equal-probability sampling, the temperatures are randomly extracted to any position at any time, so that the probability that each point is acquired is equal, at the moment, the sample formed by the temperature set can accurately deduce the integral temperature characteristic of the evaporator in the period of time, and the problem that the temperature cannot be acquired at all the positions of the evaporator in continuous time at the same time is solved.

The random location point is any single point randomly selected on the evaporator. The preset time is preset sample collecting time, the preset time can be set according to the actual condition of the refrigerator, and defrosting time and preset time of different refrigerators are different. Illustratively, the preset time ranges from 5s to 10s to ensure a sufficient number of samples during defrosting.

The average value of the temperatures of at least two random position points in the preset time can reflect the overall temperature condition of the evaporator in the preset time. The preset temperature is a preset defrosting exiting temperature threshold, the average value is greater than the preset temperature, the defrosting exiting condition is met, and defrosting can be finished.

According to the defrosting control method, through the collection of random single-point temperature on the evaporator in the defrosting process, a representative temperature sample is formed within the preset time, the average value of the evaporator temperature within the preset time is calculated, the average value is compared with the preset defrosting exiting temperature, and whether the defrosting exiting condition is met is judged, so that the defrosting exiting is controlled, the integral defrosting condition of the evaporator can be effectively observed, the defrosting exiting is reasonably controlled, and the problem that the defrosting layer on the evaporator is residual in the defrosting process in the prior art is solved.

It should be noted that, after entering defrosting, the above steps may be executed from a specified time to determine whether defrosting may exit, so as to avoid wasting processing resources by executing the above steps just after starting defrosting. For example, the temperature of at least two random points on the evaporator is acquired after 10 minutes of defrosting.

In one embodiment, acquiring the temperature of at least two random locations on the evaporator over a preset time comprises: determining a random location point on the evaporator; collecting the temperature of random position points; and after the time interval is set, determining a new random position point again, collecting the temperature of the new random position point, and circulating the steps until the preset time is reached.

Wherein the set time interval is the time interval for collecting the single-point temperature of the evaporator. The shorter the set time interval is, the more frequent the sampling is, the more the sampling times in the fixed time period are, the larger the sample size is, the better the overall inference effect is, but the too short set time interval may cause the sampling to lose the meaning of the sampling too frequently, and the acquisition cost is increased, so the set time interval needs to be set according to the actual situation. Specifically, the set time interval can be set according to the actual condition of the refrigerator, the set time intervals of the refrigerators of different models are different, and specific values need to be verified and obtained in the design stage of the refrigerator. For example, for a certain refrigerator, the value of the set time interval may range from 0.1s to 0.2 s.

According to the embodiment, the temperature is collected for multiple times according to the set time interval within the preset time, and only the temperature of a random single point is collected each time, so that the temperature sample capable of representing the overall temperature condition of the evaporator is obtained, and the defrosting is guaranteed to be withdrawn accurately.

In one embodiment, determining random location points on the evaporator comprises: abstracting an area where the evaporator is located into a three-dimensional space, and determining a coordinate range of the evaporator according to the boundary position of the evaporator; within the coordinate range of the evaporator, a coordinate is randomly determined as a random location point. The method and the device determine the coordinate range of the evaporator based on the establishment of the three-dimensional space, so that the position points are randomly selected based on the coordinate range, the single-point temperature is sampled and collected, and the reliable temperature sample is simply and conveniently obtained.

As shown in fig. 2, an XYZ three-dimensional coordinate system is established for the area where the evaporator is located, assuming that one corner of the evaporator is used as an origin, the maximum value (Xmax, Ymax, Zmax) of coordinates in three dimensions is obtained according to the boundary position of the evaporator, and the evaporator is abstracted into a rectangular parallelepiped as shown in fig. 2, and at this time, any position on the evaporator corresponds to a unique three-dimensional coordinate value (X, Y, Z) one to one. Any point on the evaporator can be indicated by the coordinate value of the position of the point. In practical applications, the origin may be set according to the calculation requirement, for example, the evaporator center may also be set as the origin.

In one embodiment, collecting the temperature at random location points comprises: and acquiring the temperature of the random position point by using an infrared temperature sensor, wherein the infrared temperature sensor is separated from the evaporator by a preset distance. The preset distance is a distance threshold that ensures that the temperature of any point on the evaporator can be collected. By arranging the single-point infrared temperature sensor, the temperature of any random position point on the evaporator can be collected conveniently and quickly at any instant.

Preferably, the infrared temperature sensor is mounted on a surface of the side of the refrigeration mask facing the evaporator. Regarding the angle of the ice side cross section, the freezing face mask, the evaporator and the inner container are sequentially arranged, the evaporator is attached to the inner container, the freezing face mask and the evaporator are at a certain distance, the infrared temperature sensor is arranged on the surface of one side of the freezing face mask facing the evaporator, and the temperature of any position point on the evaporator can be smoothly collected on the basis of not adding extra devices.

In one embodiment, after calculating the average value of the temperatures of at least two random position points, the method further comprises: if the average value is less than or equal to the preset temperature, after the time interval is set, returning to the step of acquiring the temperatures of at least two random position points on the evaporator within the preset time so as to judge whether defrosting exits again. If the average value is less than or equal to the preset temperature, the defrosting exit condition is not met, the temperature needs to be continuously collected for judgment, the defrosting exit can be effectively and accurately controlled through circulation control, and no residue is left after defrosting.

The prior art generally arranges a defrosting temperature sensor to detect the temperature of a fixed part, which leads to the failure of representing the overall condition of the evaporator. In the defrosting process, the temperature of the fixed part rises steadily, and the fundamental reason is that the acquired temperature value can only represent the temperature of one point detected by the fixed part, so that the overall temperature condition of the evaporator cannot be really inferred.

The embodiment of the invention is provided with the infrared temperature sensor, only the temperature of a single point is collected each time, and the temperature of any position point on the evaporator is randomly collected in the preset time to obtain a temperature sample so as to represent the integral temperature condition of the evaporator. In the defrosting process, the temperature collected by the infrared temperature sensor can be obviously fluctuated to a large extent at first, then the amplitude is gradually reduced, and gradually tends to a stable curve in the temperature rising process, so that the condition that the evaporator is defrosted everywhere can be obviously explained, and the defrosting exit condition is met.

Example two

The above-mentioned defrosting control method is described below with reference to a specific embodiment, however, it should be noted that the specific embodiment is only for better describing the present application and is not to be construed as a limitation to the present application. The same or corresponding terms as those of the above-described embodiments are explained, and the description of the present embodiment is omitted.

The area where the refrigerator evaporator is located is abstracted into a three-dimensional space, any point on the evaporator is designated by a coordinate value of the position where the evaporator is located, and the temperature of any point on the evaporator is randomly acquired through the infrared temperature sensor. By collecting the temperature of any single point on the evaporator in the defrosting process of the refrigerator, a representative temperature sample is formed in a given time period delta t (equivalent to the preset time), the average value of the temperature of the evaporator in the delta t is calculated and compared with a given defrosting exit temperature (equivalent to the preset temperature), whether a defrosting exit condition is met or not is judged, and defrosting exit is controlled.

According to a simple random sampling method of statistics, a system is used for obtaining a random number to generate a three-dimensional coordinate (Xt, Yt, Zt), and the value range of the random number is Xt belonging to [0, Xmax ], Yt belonging to [0, Ymax ], Zt belonging to [0, Zmax ].

As shown in fig. 3, after the defrosting is started, the method for controlling the temperature collection procedure and the defrosting exit procedure during the defrosting includes the following steps:

and S301, starting defrosting.

S302, given a starting time t0, when the time t reaches t0, the execution of the present flow is started.

S303, acquiring random number coordinates (Xt, Yt, Zt).

S304, acquiring the single-point temperature Tt of the evaporator position corresponding to the coordinates (Xt, Yt, Zt).

S305, determine whether Δ t is reached (i.e. determine whether t >. DELTA.t is satisfied), if yes, proceed to S306, if no, proceed to S309.

And S306, calculating the sample temperature mean value Ta in the period of [ t-delta t, t ].

S307, whether Ta > T is established or not is judged, if yes, the process proceeds to S308, and if not, the process proceeds to S309. T corresponds to the above-mentioned preset temperature.

And S308, ending the defrosting.

And S309, after the interval of tv time, returning to S303 to obtain the random number coordinate again, namely continuing defrosting, and continuously collecting the temperature of the position corresponding to the random number coordinate after the interval of tv time until Ta > T is met. tv corresponds to the above-mentioned set time interval.

That is, the temperature at random position points is collected once every tv interval, and at any time point t (t > Δ t needs to be satisfied), the temperature value sampled in the time period [ t- Δ t, t ] is used as a temperature sample, and the average value of the temperature samples is calculated.

The embodiment can effectively observe the defrosting condition of the whole frost layer of the evaporator, reasonably control the quitting of defrosting, and solve the problem that the frost layer on the evaporator is remained during defrosting in the prior art.

EXAMPLE III

Based on the same inventive concept, the present embodiment provides a defrosting control device, which can be used to implement the defrosting control method described in the above embodiments. The apparatus may be implemented by software and/or hardware.

Fig. 4 is a block diagram of a defrosting control apparatus according to a third embodiment of the present invention, and as shown in fig. 4, the apparatus includes:

an obtaining module 41, configured to obtain temperatures of at least two random location points on the evaporator within a preset time in a defrosting process;

a calculation module 42 for calculating an average of the temperatures of the at least two random location points;

and the control module 43 is configured to exit defrosting if the average value is greater than the preset temperature.

Optionally, the obtaining module 41 includes:

a determination unit for determining a random location point on the evaporator;

the acquisition unit is used for acquiring the temperature of the random position point;

and the processing unit is used for determining a new random position point again after a time interval is set, collecting the temperature of the new random position point, and circulating the steps until the preset time is reached.

Optionally, the determining unit is specifically configured to: abstracting the area where the evaporator is located into a three-dimensional space, and determining the coordinate range of the evaporator according to the boundary position of the evaporator; and randomly determining a coordinate in the coordinate range of the evaporator as the random position point.

Optionally, the collecting unit is specifically configured to: and acquiring the temperature of the random position point by using an infrared temperature sensor, wherein the infrared temperature sensor is separated from the evaporator by a preset distance.

Optionally, the control module 43 is further configured to: if the average value is less than or equal to the preset temperature, after a time interval is set, returning to the step of acquiring the temperatures of at least two random position points on the evaporator within the preset time so as to judge whether defrosting is quitted again.

The device can execute the method provided by the embodiment of the invention, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiment of the present invention.

Example four

The embodiment provides a refrigerator, including: the defrosting control device of the above embodiment.

EXAMPLE five

The present embodiment provides a computer device, including: the system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the method of the embodiment.

EXAMPLE six

The present embodiment provides a non-transitory computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of the above-described embodiment.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A defrosting control method is characterized by comprising the following steps:

in the defrosting process, the temperatures of at least two random position points on an evaporator are obtained within a preset time;

calculating an average value of the temperatures of the at least two random position points;

and if the average value is greater than the preset temperature, the defrosting is stopped.

2. The method of claim 1, wherein obtaining the temperature of at least two random locations on the evaporator over a predetermined time period comprises:

determining a random location point on the evaporator;

collecting the temperature of the random position points;

and after the time interval is set, determining a new random position point again, collecting the temperature of the new random position point, and circulating the steps until the preset time is reached.

3. The method of claim 2, wherein determining a random location point on the evaporator comprises:

abstracting the area where the evaporator is located into a three-dimensional space, and determining the coordinate range of the evaporator according to the boundary position of the evaporator;

and randomly determining a coordinate in the coordinate range of the evaporator as the random position point.

4. The method of claim 2, wherein collecting the temperature of the random location point comprises:

and acquiring the temperature of the random position point by using an infrared temperature sensor, wherein the infrared temperature sensor is separated from the evaporator by a preset distance.

5. The method of claim 4, wherein the infrared temperature sensor is mounted on a surface of a side of the refrigeration mask facing the evaporator.

6. The method according to any one of claims 1 to 5, further comprising, after calculating the average of the temperatures of the at least two random location points:

if the average value is less than or equal to the preset temperature, after a time interval is set, returning to the step of acquiring the temperatures of at least two random position points on the evaporator within the preset time so as to judge whether defrosting is quitted again.

7. A defrosting control apparatus characterized by comprising:

the defrosting control device comprises an acquisition module, a control module and a control module, wherein the acquisition module is used for acquiring the temperatures of at least two random position points on an evaporator within preset time in the defrosting process;

the calculation module is used for calculating the average value of the temperatures of the at least two random position points;

and the control module is used for exiting defrosting if the average value is greater than the preset temperature.

8. A refrigerator, characterized by comprising: the defrosting control unit of claim 7.

9. A computer device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 6 when executing the computer program.

10. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method of any of claims 1 to 6.