CN111351308A

CN111351308A - Refrigeration equipment, control method and control device for defrosting refrigeration equipment and storage medium

Info

Publication number: CN111351308A
Application number: CN202010167133.3A
Authority: CN
Inventors: 王君
Original assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Priority date: 2020-03-11
Filing date: 2020-03-11
Publication date: 2020-06-30
Anticipated expiration: 2040-03-11
Also published as: CN111351308B

Abstract

The embodiment of the invention provides refrigeration equipment, a control method and a control device for defrosting the refrigeration equipment, and a storage medium, and belongs to the field of electrical appliances. The refrigeration equipment comprises a freezing chamber, wherein an evaporator for refrigerating, a compartment temperature sensor for detecting the compartment temperature in the freezing chamber and a defrosting temperature sensor for detecting the temperature of the evaporator are arranged in the freezing chamber, and the control method comprises the following steps: under the condition that the freezing chamber is in a refrigerating state, determining a first descending amplitude of the temperature of the freezing chamber within a preset time length; and under the condition that the first descending amplitude is smaller than a preset amplitude and the temperature of the evaporator is smaller than a preset temperature, performing instant defrosting operation on the evaporator. Through the technical scheme, when the evaporator is full of frost or frost is blocked, the evaporator can be defrosted in time, and the normal use of the refrigeration equipment is prevented from being influenced due to the fact that the evaporator is frosted in a large quantity.

Description

Refrigeration equipment, control method and control device for defrosting refrigeration equipment and storage medium

Technical Field

The invention relates to the field of electric appliances, in particular to a refrigeration device, a control method and a control device for defrosting the refrigeration device, and a storage medium.

Background

At present, the air-cooled refrigerator generally judges whether to defrost a freezing chamber according to the accumulated running time of a compressor. That is, when the accumulated operation time of the compressor reaches a predetermined defrosting period, the defrosting operation of the freezing chamber is started. However, when the air-cooled refrigerator is used in a severe environment, for example, a door of a freezer compartment is frequently opened or food with a high moisture content is placed in the freezer compartment, a large amount of moisture may enter the freezer compartment and frost may be formed on an evaporator. Therefore, when the accumulated running time of the compressor does not reach the preset defrosting period, the evaporator may be full of frost or even frost is blocked, so that the evaporator cannot be normally cooled, and the use of a user is seriously influenced.

Disclosure of Invention

To at least partially solve the above problems in the prior art, an object of an embodiment of the present invention is to provide a refrigeration apparatus, a control method and a control device for defrosting the refrigeration apparatus, and a storage medium.

In order to achieve the above object, in a first aspect of embodiments of the present invention, there is provided a control method for defrosting a refrigeration apparatus including a freezing chamber in which an evaporator for cooling, a compartment temperature sensor for detecting a compartment temperature in the freezing chamber, and a defrosting temperature sensor for detecting an evaporator temperature are provided, the control method comprising: under the condition that the freezing chamber is in a refrigerating state, determining a first descending amplitude of the temperature of the freezing chamber within a preset time length; and under the condition that the first descending amplitude is smaller than a preset amplitude and the temperature of the evaporator is smaller than a preset temperature, performing instant defrosting operation on the evaporator.

Optionally, the refrigeration apparatus further includes a compressor for refrigerating the freezing compartment, and the control method further includes: determining a second descending amplitude of the compartment temperature within a preset time length under the condition that the freezing compartment enters the refrigerating state again after the instant defrosting operation is executed; and under the condition that the second descending amplitude is greater than or equal to the preset amplitude, shortening the defrosting cycle of the refrigeration equipment by preset time; wherein the refrigeration apparatus performs a defrosting operation in a case where the operation time of the compressor reaches the defrosting cycle.

Optionally, the control method further includes: and executing fault alarm under the condition that the second descending amplitude is smaller than the preset amplitude.

Optionally, the control method further includes: determining whether the current defrosting cycle is an initial time length or not under the condition that the instant defrosting operation is not executed in the latest defrosting cycle; and under the condition that the defrosting period is not the initial time length, restoring the defrosting period to the initial time length or shortening the time length before the defrosting period for the last time.

Optionally, the control method further includes: acquiring the state of a door body of the freezing chamber; determining a first drop amplitude of the compartment temperature within a preset time period under the condition that the freezing compartment is in a refrigerating state, including: and under the condition that the freezing chamber is in a refrigerating state and the door body of the freezing chamber is in a closing state, determining a first descending amplitude of the compartment temperature within a preset time length.

Optionally, the refrigeration apparatus further includes a compressor for refrigerating the freezing chamber, a freezing fan is disposed in the freezing chamber, and the control method further includes: and under the condition that the compressor and the freezing fan are both detected to be in the running state, determining that the freezing chamber is in the refrigerating state.

Optionally, the immediate defrost operation comprises: starting a heating device arranged on the evaporator; and controlling the heating device to be turned off in a case where the evaporator temperature is higher than a defrost exit temperature.

In a second aspect of an embodiment of the present invention, there is provided a control device for defrosting a refrigeration appliance, the control device including: the defrosting control method for the refrigeration equipment comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the control method for defrosting of the refrigeration equipment.

In a third aspect of embodiments of the present invention, there is provided a refrigeration apparatus including a freezing chamber in which an evaporator for cooling, a compartment temperature sensor for detecting a compartment temperature in the freezing chamber, and a defrost temperature sensor for detecting an evaporator temperature are provided, the refrigeration apparatus further including: the defrosting device is used for defrosting the evaporator; and the control device for defrosting the refrigeration equipment.

In a fourth aspect of embodiments of the present invention, there is provided a machine-readable storage medium having stored thereon instructions for enabling a processor to execute the above-described control method for defrosting a refrigeration appliance when the instructions are executed by the processor.

In the technical scheme, the frosting condition of the evaporator can be determined and whether the evaporator is full or blocked by frost or not can be determined by detecting the temperature descending amplitude of the freezing chamber within the preset time, so that when the evaporator is full or blocked by frost, the evaporator can be timely defrosted, and the normal use of the refrigeration equipment is prevented from being influenced by the large amount of frosting of the evaporator.

Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:

fig. 1 is a flowchart illustrating a control method for defrosting a refrigeration apparatus according to an embodiment of the present invention;

FIG. 2 illustrates a flow chart of a control method for defrosting a refrigeration unit according to an alternative embodiment of the present invention;

FIG. 3 is a flow chart illustrating a control method for defrosting a refrigeration apparatus according to an embodiment of the present invention; and

fig. 4 is a block diagram schematically illustrating a refrigeration apparatus according to an embodiment of the present invention.

Description of the reference numerals

10-compartment room temperature sensor 20 defrosting temperature sensor

30 defroster 40 control device

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not be within the protection scope of the present invention.

Fig. 1 is a flowchart illustrating a control method for defrosting a refrigeration apparatus according to an embodiment of the present invention. As shown in fig. 1, the embodiment of the invention provides a control method for defrosting a refrigeration device. The refrigerating apparatus may include a freezing chamber, and an evaporator for refrigerating, a compartment temperature sensor for detecting a compartment temperature in the freezing chamber, and a defrost temperature sensor for detecting a temperature of the evaporator may be provided in the freezing chamber. The control method for defrosting the refrigeration equipment can comprise the following steps:

in step S11, in a case where the freezing compartment is in a cooling state, a first decrease range of the compartment temperature of the freezing compartment within a preset time period is determined.

In step S12, in the case that the first falling amplitude is smaller than the preset amplitude and the evaporator temperature is smaller than the preset temperature, an instant defrosting operation is performed on the evaporator.

So, through detecting the temperature decline range of freezer in predetermineeing the duration, can confirm the condition of frosting of evaporimeter and confirm whether full frost or frost stifled takes place for the evaporimeter to when full frost or frost stifled takes place for the evaporimeter, can in time defrost the evaporimeter, avoid influencing refrigeration plant's normal use because the evaporimeter frosts in a large number.

In particular, the refrigeration device may be a refrigerator or freezer or the like. The refrigerating apparatus may include compartments for storing food items, such as a freezing compartment and/or a refrigerating compartment. The refrigerating chamber can be internally provided with an evaporator for refrigeration, and the evaporator, a compressor and other devices jointly form a refrigerating system of the refrigerating equipment. During operation of the refrigeration system, the evaporator absorbs heat from within the freezer compartment, thereby reducing the temperature within the freezer compartment. Because the surface of the evaporator is prone to frost formation, the evaporator needs to be defrosted to avoid the normal use of the refrigeration equipment being affected by the large amount of frost formation of the evaporator. In the present embodiment, two temperature sensors, i.e., a compartment temperature sensor and a defrosting temperature sensor, may be provided in the freezing chamber. Among them, the compartment temperature sensor is used to detect the temperature of the internal space of the freezing compartment (i.e., the compartment temperature), and the defrost temperature sensor is used to detect the temperature of the evaporator (i.e., the evaporator temperature). In the working process of the refrigeration equipment, under the condition that the compressor and the freezing fan in the freezing chamber are both detected to be in the running state, the freezing chamber can be determined to be in the refrigerating state. The control means for defrosting the refrigerating apparatus may detect the compartment temperature of the freezing compartment and the evaporator temperature in a refrigerating state, and determine a decreasing magnitude (i.e., a first decreasing magnitude) of the compartment temperature of the freezing compartment within a preset time period. If the evaporator temperature is lower than the preset temperature (for example, -10 ℃) and the first drop amplitude is lower than the preset amplitude, the evaporator functions normally, but the heat exchange between the evaporator and the gas in the freezing chamber is affected due to the full frost or frost blockage of the evaporator, so that the refrigerating capacity of the evaporator is reduced, and therefore, the evaporator needs to be immediately defrosted (namely, immediately defrosted) to ensure the normal use of the evaporator. If the temperature of the evaporator is greater than or equal to the preset temperature, the fact that the evaporator is not cooled or the refrigeration function of the evaporator is abnormal due to faults is indicated, and the frosting condition of the surface of the evaporator cannot be judged according to the first descending amplitude. If the first drop amplitude is greater than or equal to the preset amplitude, it indicates that the current refrigerating capacity of the evaporator can meet the refrigerating requirement of the freezing chamber, and therefore, the defrosting operation is not required. Wherein, the selection range of the preset duration can be 5min to 10min, and the selection range of the descending amplitude can be 1 ℃ to 3 ℃. And the specific values of the preset duration and the descending amplitude can be determined according to the ambient temperature around the refrigeration equipment. For example, an ambient temperature sensor for detecting the ambient temperature around the refrigeration equipment may be disposed on the refrigeration equipment, and when a change in the ambient temperature is detected, the preset duration and/or the reduction range may be increased or decreased according to the change in the ambient temperature.

The refrigeration equipment can perform defrosting operation on the evaporator through the freezing fan and the heating device. For example, when the evaporator in the freezing chamber needs to be defrosted, the control device can turn off the compressor and turn on the freezing fan to take away the cold on the surface of the evaporator in a blowing manner. After the freezing fan is started for a designated time, the control device closes the freezing fan and starts a heating device on the evaporator so as to defrost the evaporator in a heating mode. The defrosting temperature sensor in the freezing chamber may detect the evaporator temperature, and the control means controls the heating means to stop heating in a case where it is determined that the evaporator temperature reaches a predetermined defrosting exit temperature (e.g., 5 deg.c), thereby ending the entire defrosting process. In this embodiment, when it is determined that the instant defrosting operation is required, the step of turning on the freezing fan may be omitted, and the heating device may be directly turned on to defrost, so as to increase the defrosting speed.

Fig. 2 is a flow chart illustrating a control method for defrosting a refrigeration apparatus according to an alternative embodiment of the present invention. As shown in fig. 2, in an alternative embodiment of the present invention, the control method for defrosting a refrigeration apparatus may further include:

and step S13, determining a second drop amplitude of the compartment temperature of the freezing compartment within a preset time period in case that the freezing compartment re-enters the cooling state after the instant defrosting operation is performed.

And step S14, in case that the second falling amplitude is greater than or equal to the preset amplitude, shortening the defrosting cycle of the refrigeration equipment by a preset time.

Specifically, the refrigeration apparatus may have a preset defrost cycle (e.g., 15 hours), and perform a defrost operation on the evaporator whenever the operation time of the compressor reaches the defrost cycle. Therefore, the evaporator can be prevented from being full of frost or frost blockage by periodically executing defrosting operation on the evaporator. In the present embodiment, after the instant defrosting operation is performed on the evaporator, in a case where the freezing chamber enters the cooling state again, a decrease range of the compartment temperature of the freezing chamber within the preset time period (i.e., a second decrease range) may be determined again, and in a case where the second decrease range is greater than or equal to the preset range, it indicates that the evaporator recovers the normal cooling capacity after the instant defrosting operation, so it may be determined that the first decrease range is smaller than the preset range due to a large amount of frost formation of the evaporator. Because the normal use of the evaporator is affected by frosting when the preset defrosting period is not reached, the defrosting period of the refrigeration equipment can be shortened by a preset time (for example, 3 hours), so that the defrosting period is more consistent with the current working scene of the refrigeration equipment. After the defrosting period is shortened for multiple times (for example, 3 times), the instant defrosting operation still needs to be executed when the defrosting period is not reached, which indicates that the refrigeration equipment is in failure and prompts a user to perform maintenance. In addition, after the instant defrosting operation is performed on the evaporator, under the condition that the freezing chamber enters the refrigeration state again, if the second descending amplitude is detected to be smaller than the preset amplitude, it is indicated that the instant defrosting operation does not enable the evaporator to recover the normal refrigeration capacity, and therefore a fault alarm needs to be performed to prompt a user to perform maintenance.

Further, if the refrigeration device does not perform the instant defrosting operation in the last defrosting cycle, that is, the refrigeration device does not perform the instant defrosting operation between two adjacent defrosting operations according to the defrosting cycle, it indicates that the evaporator is not full of frost or blocked of frost in the defrosting cycle, at this time, it may be determined whether the current defrosting cycle of the refrigeration device is the initial duration (for example, 15 hours), and if the current defrosting cycle is not the initial duration, the defrosting cycle is restored to the initial duration or the duration before the last defrosting cycle is shortened (that is, increased by 3 hours). It can be understood that, since the instant defrosting operation is generally caused by a short-term behavior that the door is frequently opened for a period of time or food with high moisture content is temporarily put into the freezing chamber, after the influence caused by the behavior is eliminated, the evaporator is periodically defrosted in the initial defrosting cycle, so that the occurrence of full frost or frost blockage can be avoided. Therefore, if the instant defrosting operation is not performed by the refrigeration equipment in the last defrosting cycle, the defrosting cycle can be prolonged or restored to the initial time directly, so as to avoid frequent defrosting of the refrigeration equipment, and save electric energy.

In an alternative embodiment of the present invention, the step S11 may include: and under the condition that the freezing chamber is in a refrigerating state and a door body of the freezing chamber is in a closing state, determining a first descending amplitude of the temperature of the freezing chamber within a preset time length. Specifically, the refrigeration equipment can further comprise a door state sensor, and the door state sensor can detect the door state of the freezing chamber. In order to avoid that the first descending amplitude is smaller than the preset amplitude due to the fact that the freezing chamber is in the door opening state, and the instant defrosting operation is triggered by mistake, the door body state of the freezing chamber can be determined before the first descending amplitude is detected, and if the door body is in the opening state, the descending amplitude of the temperature of the compartment of the freezing chamber within the preset time length is not detected.

Fig. 3 is a flowchart illustrating a control method for defrosting a refrigeration apparatus according to an embodiment of the present invention. As shown in fig. 3, in an embodiment of the present invention, the refrigeration apparatus may detect a falling range of the compartment temperature of the freezing compartment within a preset time period and an evaporator temperature in a case where the freezing door is closed and the compressor is in an operating state, and determine whether the freezing fan is operated according to a feedback signal of the freezing fan in the freezing compartment. When the falling amplitude of the temperature of the compartment of the freezing chamber in the preset time period is detected to be not equal to the preset amplitude, and the normal operation of the freezing fan and the condition that the temperature of the evaporator is lower than the preset temperature are determined, the evaporator of the freezing chamber is considered to be full of frost or frost blocked, so that a defrosting heating wire on the evaporator can be started to defrost the evaporator of the freezing chamber. After defrosting is finished, the compressor can be started again for refrigeration. And when the door body of the freezing chamber is closed and the compressor is in the running state, the falling amplitude of the temperature of the freezing chamber in the preset time length can be detected again. If the descending amplitude reaches the preset amplitude, the fact that the evaporator is frosted and blocked is confirmed, so that the preset defrosting period can be reduced by N hours (for example, 3 hours) on the basis of the current time length; if the descending amplitude still does not reach the preset amplitude, the refrigeration of the refrigeration equipment is abnormal due to other reasons, so that the refrigeration equipment can be prompted to have a refrigeration fault through a display screen and other devices so as to remind a user to overhaul. The refrigeration equipment can detect whether the evaporator is full of frost in real time based on the conditions, and if the evaporator is not full of frost in one defrosting period, namely, the instant defrosting operation is not carried out, the defrosting period is recovered to the initial time length.

Therefore, under the condition that the evaporator is full of frost or frost is blocked in advance due to the fact that the door body of the freezing chamber is opened frequently or food with high moisture content is placed in the freezing chamber, the evaporator can be defrosted in time, and the evaporator cannot be full of frost or frost blocked before defrosting according to the current defrosting cycle next time is ensured as much as possible, so that normal operation of the refrigeration equipment is guaranteed.

Embodiments of the present invention also provide a control device for defrosting a refrigeration apparatus, which may include: the control method for defrosting the refrigeration equipment comprises a memory, a processor and a computer program which is stored in the memory and can run on the processor, wherein the processor executes the computer program to realize the control method for defrosting the refrigeration equipment. The control device may be a processor, a microcontroller, a main control board, or the like.

Fig. 4 is a block diagram schematically illustrating a refrigeration apparatus according to an embodiment of the present invention. As shown in fig. 4, the embodiment of the present invention also provides a refrigerating apparatus, which may include a freezing chamber, in which an evaporator (not shown) for refrigerating, a compartment temperature sensor 10 for detecting a compartment temperature in the freezing chamber, and a defrost temperature sensor 20 for detecting an evaporator temperature may be disposed. The refrigeration device may further comprise a defrosting device 30 and a control device 40, the defrosting device 30 being used for defrosting the evaporator, the defrosting device may comprise a freezing fan and/or a heating device, etc. The control device 40 is electrically connected to the compartment temperature sensor 10, the defrosting temperature sensor 20 and the defrosting device 30, and is used for implementing the control method for defrosting the refrigeration equipment. Wherein, the refrigeration equipment can be a refrigerator or an ice chest and the like.

Embodiments also provide a machine-readable storage medium having stored thereon instructions for enabling a processor to execute the above-described control method for defrosting a refrigeration appliance when executed by the processor.

While the invention has been described in detail with reference to the drawings, the invention is not limited to the details of the embodiments, and various simple modifications can be made within the technical spirit of the embodiments of the invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention will not be described separately for the various possible combinations.

Those skilled in the art will appreciate that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes instructions for causing a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the idea of the embodiments of the present invention.

Claims

1. A control method for defrosting of refrigeration equipment is characterized in that the refrigeration equipment comprises a freezing chamber, an evaporator for refrigerating, a compartment temperature sensor for detecting the compartment temperature in the freezing chamber and a defrosting temperature sensor for detecting the temperature of the evaporator are arranged in the freezing chamber, and the control method comprises the following steps:

under the condition that the freezing chamber is in a refrigerating state, determining a first descending amplitude of the temperature of the freezing chamber within a preset time length; and

and under the condition that the first descending amplitude is smaller than a preset amplitude and the temperature of the evaporator is smaller than a preset temperature, performing instant defrosting operation on the evaporator.

2. The control method according to claim 1, wherein the refrigerating apparatus further includes a compressor for refrigerating the freezing compartment, the control method further comprising:

determining a second descending amplitude of the compartment temperature within a preset time length under the condition that the freezing compartment enters the refrigerating state again after the instant defrosting operation is executed; and

when the second descending amplitude is larger than or equal to the preset amplitude, shortening the defrosting period of the refrigeration equipment by preset time;

wherein the refrigeration apparatus performs a defrosting operation in a case where the operation time of the compressor reaches the defrosting cycle.

3. The control method according to claim 2, characterized by further comprising:

and executing fault alarm under the condition that the second descending amplitude is smaller than the preset amplitude.

4. The control method according to claim 2, characterized by further comprising:

determining whether the current defrosting cycle is an initial time length or not under the condition that the instant defrosting operation is not executed in the latest defrosting cycle; and

and under the condition that the defrosting period is not the initial time length, restoring the defrosting period to the initial time length or shortening the time length before the defrosting period for the last time.

5. The control method according to claim 1, characterized by further comprising:

acquiring the state of a door body of the freezing chamber;

determining a first drop amplitude of the compartment temperature within a preset time period under the condition that the freezing compartment is in a refrigerating state, including: and under the condition that the freezing chamber is in a refrigerating state and the door body of the freezing chamber is in a closing state, determining a first descending amplitude of the compartment temperature within a preset time length.

6. The control method according to claim 1, wherein the refrigeration apparatus further includes a compressor for refrigerating the freezing chamber, a freezing fan is provided in the freezing chamber, and the control method further includes:

and under the condition that the compressor and the freezing fan are both detected to be in the running state, determining that the freezing chamber is in the refrigerating state.

7. The control method of claim 1, wherein the immediate defrost operation comprises:

starting a heating device arranged on the evaporator; and

controlling the heating device to be turned off in a case where the evaporator temperature is higher than a defrost exit temperature.

8. A control for defrosting a refrigeration appliance, the control comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor executing the computer program to implement the control method for defrosting a refrigeration device according to any one of claims 1 to 7.

9. The utility model provides a refrigeration plant, its characterized in that, refrigeration plant includes the freezer, be equipped with in the freezer and be used for cryogenic evaporimeter, be used for detecting the room temperature sensor of room temperature in the freezer and be used for detecting the defrosting temperature sensor of evaporimeter temperature, refrigeration plant still includes:

the defrosting device is used for defrosting the evaporator; and

a control for defrosting a refrigeration unit as set forth in claim 8.

10. A machine-readable storage medium having stored thereon instructions for enabling a processor to execute the control method for defrosting a refrigeration appliance according to any one of claims 1 to 7 when the instructions are executed by the processor.