CN110081655B

CN110081655B - Refrigeration equipment and evaporator anti-frosting method

Info

Publication number: CN110081655B
Application number: CN201910272889.1A
Authority: CN
Inventors: 邓冰; 晏康福; 覃元成; 陈星�; 宋志红
Original assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Current assignee: Hisense Ronshen Guangdong Refrigerator Co Ltd
Priority date: 2019-04-04
Filing date: 2019-04-04
Publication date: 2021-03-23
Anticipated expiration: 2039-04-04
Also published as: CN110081655A

Abstract

The application discloses refrigeration equipment and an evaporator frosting prevention method, relates to the field of refrigeration, and is used for preventing an evaporator from frosting when a door body is not closed for a long time. Refrigeration plant, including compressor, evaporimeter, heater, walk-in, freezer, air door and controller, the evaporimeter is used for the freezer refrigeration, through the air door intercommunication between walk-in and the freezer, the controller is used for: when a preset condition is met, acquiring the temperature of the refrigerating chamber and the temperature of the freezing chamber, wherein the meeting of the preset condition comprises that the continuous operation of the compressor is longer than a first preset time; and if the temperature of the freezing chamber is less than a first threshold value, the temperature of the refrigerating chamber is greater than a second threshold value, and the air door is opened for a time greater than a second preset time, starting the heater to heat so as to overheat and defrost the evaporator, wherein the first threshold value is less than the shutdown temperature of the coldest set gear of the freezing chamber, and the second threshold value is greater than the set startup temperature of the refrigerating chamber. The embodiment of the application is applied to refrigeration equipment to prevent the evaporator from frosting.

Description

Refrigeration equipment and evaporator anti-frosting method

Technical Field

The application relates to the field of refrigeration, in particular to a refrigeration device and an evaporator anti-frosting method.

Background

When a certain compartment door body of refrigeration equipment such as a refrigerator is not closed for a long time and cold leakage occurs, the temperature of the compartment gradually rises, the temperatures of other compartments are influenced, an evaporator is frosted, and abnormal refrigeration is caused.

For example, in the prior art, the freezing chamber is refrigerated by the evaporator of the refrigeration equipment, then the cold air in the freezing chamber is blown into the refrigerating chamber through air circulation to refrigerate the refrigerating chamber, if a door body of the refrigerating chamber is not closed for a long time, the temperature of the refrigerating chamber cannot reach the set temperature all the time, so that the compressor continuously refrigerates, the temperature of the freezing chamber is low, and frost and even ice are formed on the evaporator, and the ice is difficult to clean.

Disclosure of Invention

The embodiment of the application provides a refrigeration device and an evaporator frosting prevention method, which are used for preventing the evaporator from frosting when a door body is not closed for a long time.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

in a first aspect, an embodiment of the present application provides a refrigeration device, including compressor, evaporimeter, heater, walk-in, freezer, air door and controller, the evaporimeter is used for right the freezer refrigeration, the walk-in with pass through between the freezer the air door intercommunication, the controller is used for:

when a preset condition is met, acquiring the temperature of the refrigerating chamber and the temperature of the freezing chamber, wherein the meeting of the preset condition comprises that the compressor continuously operates for more than a first preset time;

if the temperature of the freezing chamber is smaller than a first threshold value, the temperature of the refrigerating chamber is larger than a second threshold value, and the air door is opened for a second preset time, the heater is started to heat the evaporator to perform over-temperature defrosting, wherein the first threshold value is smaller than the shutdown temperature of the coldest set gear of the freezing chamber, and the second threshold value is larger than the set startup temperature of the refrigerating chamber.

In a second aspect, an embodiment of the present application provides an evaporator anti-frosting method applied to the refrigeration equipment according to the first aspect, where the evaporator anti-frosting method includes:

when preset conditions are met, acquiring the temperature of a refrigerating chamber and the temperature of a freezing chamber, wherein the preset conditions are met, and the condition that the compressor continuously operates for more than a first preset time is included;

if the temperature of the freezing chamber is smaller than a first threshold value, the temperature of the refrigerating chamber is larger than a second threshold value, and the air door is opened for a second preset time, the heater is started to heat so as to perform over-temperature defrosting on the evaporator, wherein the first threshold value is smaller than the shutdown temperature of the coldest set gear of the freezing chamber, and the second threshold value is larger than the set startup temperature of the refrigerating chamber.

In a third aspect, there is provided a computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computer, cause the computer to perform the evaporator anti-frost method of the second aspect.

In a fourth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the evaporator anti-frosting method according to the second aspect.

In a fifth aspect, there is provided a refrigeration apparatus comprising: the evaporator anti-frosting method comprises a processor and a memory, wherein the memory is used for storing programs, and the processor calls the programs stored in the memory to execute the evaporator anti-frosting method in the second aspect.

According to the refrigeration equipment and the evaporator anti-frosting method provided by the embodiment of the application, when the preset conditions are met, the temperature of the refrigerating chamber and the temperature of the freezing chamber are obtained, wherein the preset conditions are met, and the condition that the compressor continuously operates for more than a first preset time is included; and if the temperature of the freezing chamber is less than a first threshold value, the temperature of the refrigerating chamber is greater than a second threshold value, and the air door is opened for a time greater than a second preset time, starting the heater to heat so as to overheat and defrost the evaporator, wherein the first threshold value is less than the shutdown temperature of the coldest set gear of the freezing chamber, and the second threshold value is greater than the set startup temperature of the refrigerating chamber. The refrigerating chamber door body can be determined to be opened for a long time in the mode, so that the evaporator is subjected to overtemperature defrosting through the heater, and the evaporator is prevented from frosting when the door body is not closed for a long time.

Drawings

Fig. 1 is a schematic perspective view of a refrigeration apparatus provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a refrigeration apparatus provided in an embodiment of the present application;

fig. 3 is a schematic view of an air-cooling cycle of a refrigeration apparatus provided by an embodiment of the present application;

fig. 4 is a schematic flow chart of a control of refrigeration by a refrigeration device according to an embodiment of the present application;

FIG. 5 is a first schematic flow chart of an evaporator anti-frosting method provided by an embodiment of the present application;

fig. 6 is a second schematic flow chart of an evaporator anti-frosting method according to an embodiment of the present disclosure.

Detailed Description

The embodiment of the application provides a refrigerating device which can be a refrigerating device such as a freezer, a refrigerator and a freezer. The embodiment of the present application is described by taking a refrigerator as an example and is not intended to be limiting.

Fig. 1 is a perspective view of a refrigeration device. The refrigeration apparatus of the present embodiment has an approximately rectangular parallelepiped shape. The external appearance of the refrigerating apparatus is defined by a storage compartment 100 defining a storage space and a plurality of door bodies 200 provided in the storage compartment 100. The storage compartment 100, also referred to as a compartment, may be vertically partitioned into a lower freezer compartment 100A and an upper refrigerator compartment 100B.

As shown in fig. 2, the refrigerating apparatus further includes: a compressor 11, a condenser 12, a dry filter 13, a capillary tube 14, an evaporator 15, a fan 16, and a heater 17.

The gaseous refrigerant is compressed by the compressor 11 and condensed into a liquid state in the condenser 12, and releases heat. After the dry filter 13 filters impurities in the refrigerant, the refrigerant is vaporized into a gaseous state in the evaporator 15 through the capillary tube 14 while absorbing heat, and finally returns to the compressor 11. The fan 16 may facilitate heat exchange between the evaporator 15 and the compartment of the refrigeration appliance. When the compressor is not operated, the heater 17 may heat the evaporator 15 to defrost the evaporator 15.

As shown in fig. 3, which is a schematic diagram of an air-cooling cycle of a refrigeration appliance, the refrigeration appliance further includes a damper 18 and a controller (not shown). The evaporator and the fan 16 are generally arranged at the back of the freezing chamber, the refrigerating chamber is communicated with the freezing chamber through the air door 18, and the controller controls the fan 16 to operate to blow cold air in the freezing chamber into the refrigerating chamber through the air door 18 so as to refrigerate the refrigerating chamber.

Fig. 4 is a schematic flow chart of a control method for a refrigeration apparatus.

When cooling is requested for the refrigerating compartment, steps S401 and S403 are performed, and steps S402 and S404 are performed when cooling is requested to stop for the refrigerating compartment. When the cooling of the freezing compartment is requested, step S403 is performed, and when the cooling of the freezing compartment is requested to be stopped, step S404 is performed.

S401, opening a damper.

S402, closing the air door.

And S403, starting the compressor and starting the fan.

And S404, stopping the compressor and stopping the fan.

That is, when the compressor is started, the fan is started and the air door is closed, the freezing chamber is independently refrigerated; when the compressor is started, the fan is started, and the air door is opened, the refrigerating chamber and the freezing chamber are refrigerated together.

When the opening angle of the refrigeration door is smaller and does not exceed the door opening threshold angle, the controller detects the door opening and closing, judges that the door is closed, and does not give an alarm. At the moment, the cold leakage occurs in the refrigerating chamber, the temperature of the refrigerating chamber is increased and refrigeration is required, so that the compressor is started, the fan is started, and the air door is opened. Along with the extension of the refrigerating time, more and more outside high-temperature and high-humidity gas enters the refrigerating air duct for circulation, the evaporator is frosted at an accelerated speed and blocks an air return opening at the back of the evaporator, so that air cannot be supplied to the refrigerating chamber, the temperature of the refrigerating chamber is continuously increased, and the temperature of the refrigerating chamber is continuously reduced. Once the frost layer on the evaporator becomes thick and gradually becomes solid ice, the air return opening is completely blocked, the solid ice is difficult to melt even the evaporator is heated, and finally the situations that the refrigerating chamber is not refrigerated, the freezing chamber is supercooled, food in the refrigerating chamber is deteriorated, and the compressor is not stopped or even damaged occur.

The embodiment of the application provides an evaporator anti-frosting method, which can be executed by a controller and comprises the following steps:

and S501, acquiring the temperature of the refrigerating chamber and the temperature of the freezing chamber when preset conditions are met.

Wherein, the satisfaction of the preset condition includes that the compressor continuously operates for more than a first preset time. The compressor can enter into overtemperature defrosting only under the condition that the continuous running time of the compressor is longer than the first preset time, and frequent defrosting can be avoided.

Optionally, before the compressor continuously operates for more than the first preset time, satisfying the preset condition may further include: and powering on the refrigeration equipment for more than a third preset time. Namely, after the refrigeration equipment is electrified for more than the third preset time, the compressor is judged to continuously run for more than the first preset time. The third preset time needs to be selected properly, and if the third preset time is too short, the temperature of each room of the refrigeration equipment does not reach a steady state, so that misjudgment is easy to occur; if it is too large, the frost layer on the evaporator may be frozen and the frost may not be dissolved in time. Illustratively, the third predetermined time may be 1 hour to 3 hours.

And S502, if the temperature of the freezing chamber is less than a first threshold value, the temperature of the refrigerating chamber is greater than a second threshold value, and the air door is opened for more than a second preset time, starting the heater to heat so as to overheat and defrost the evaporator.

Wherein the first threshold is less than the shutdown temperature of the coldest set gear of the freezing chamber. The second threshold is greater than the preset starting temperature of the refrigerating chamber.

The stop temperature of the coldest set gear of the freezing chamber refers to the temperature in the freezing chamber which triggers the compressor to stop when the freezing chamber is at the coldest set gear. When the freezing chamber is in the coldest set gear, the compressor is triggered to stop after the temperature in the freezing chamber is detected to be less than or equal to the stop temperature of the coldest set gear of the freezing chamber.

It should be noted that the first threshold is smaller than the shutdown temperature of the coldest set gear of the freezing chamber, but not the first threshold is smaller than the set shutdown temperature value of the freezing chamber, because the set shutdown temperature value of the freezing chamber is associated with the set gear, when the set gear of the freezing chamber is increased, the corresponding set shutdown temperature value of the freezing chamber is also increased, but the current temperature in the freezing chamber does not change very quickly, and there is a possibility that the set shutdown temperature value of the freezing chamber is higher than the current temperature in the freezing chamber, so that a misjudgment occurs. For example, the first threshold may be 1-3 ℃ less than the shutdown temperature of the coldest set gear of the freezer compartment.

The temperature of freezer is less than first threshold value, the temperature of walk-in is greater than the second threshold value to the air door is opened and is greater than the second and predetermine the time, and on the one hand, the air door is opened and is lasted the refrigeration to the walk-in through the forced air cooling circulation after a period of time, but the walk-in temperature is still on the high side, and on the other hand, because the compressor continues the operation and leads to the freezer temperature on the low side, synthesizes and sees that the walk-in door body. Illustratively, the second preset time may be 20 minutes to 60 minutes. The second threshold value is 1-3 ℃ higher than the set starting temperature of the refrigerating chamber.

Optionally, as shown in fig. 6, the method may further include:

and S503, if the overtemperature defrosting frequency is larger than or equal to a third threshold value, prompting warning information.

When a certain compartment door body of refrigeration equipment such as a refrigerator is not closed for a long time and cold leakage occurs, the temperature of the compartment gradually rises, the temperatures of other compartments are influenced, and abnormal refrigeration occurs.

Generally, the state of a door body is detected by installing a mechanical door switch or a magnetic induction door switch in the prior art, and when the door body is not closed for a certain time, a control unit sends alarm information to remind a user of closing the door in time.

However, some refrigeration equipment cannot give an alarm when the door switch is not provided, or the door switch is damaged, or the installation position of the door switch is deviated, or the opening angle of the door body is small and exceeds the detection precision of the door switch.

This application can set up the count value to overtemperature defrosting, when carrying out overtemperature defrosting at every turn, just increases this count value, when overtemperature defrosting number of times is greater than or equal to the third threshold value, can confirm that the refrigeration state of refrigerator has appeared unusually, suggestion alarm information. And the count value may be cleared in preparation for the next round of detection. Illustratively, the third threshold value may take a value of 3 to 5.

Further, if the alarm release button is pressed or the door body is opened and closed, the alarm information is cleared.

Embodiments of the present application provide a computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computer, cause the computer to perform an evaporator anti-frost method as described in fig. 5-6.

Embodiments of the present application provide a computer program product containing instructions that, when executed on a computer, cause the computer to perform an evaporator anti-frost method as described in fig. 5-6.

An embodiment of the present application provides a refrigeration apparatus, including: a processor and a memory, the memory for storing a program, the processor calling the program stored in the memory to perform the evaporator anti-frosting method as described in fig. 5-6.

As the refrigeration apparatus, the computer-readable storage medium, and the computer program product in the embodiments of the present application may be applied to the above method for preventing frosting of the evaporator, so that the technical effects obtained by the method may also refer to the above method embodiments, and the embodiments of the present application are not described herein again.

The above units may be individually configured processors, or may be implemented by being integrated into one of the processors of the controller, or may be stored in a memory of the controller in the form of program codes, and the functions of the above units may be called and executed by one of the processors of the controller. The processor described herein may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement embodiments of the present Application.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

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 units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

Claims

1. The utility model provides a refrigeration plant, includes compressor, evaporimeter, heater, walk-in, freezer, air door and controller, the evaporimeter is used for right the freezer refrigeration, the walk-in with pass through between the freezer the air door intercommunication when satisfying preset condition, acquires the temperature of walk-in with the temperature of freezer, satisfy preset condition and include compressor continuous operation is greater than first preset time, its characterized in that, the controller is used for:

and if the temperature of the freezing chamber is less than a first threshold value, the temperature of the refrigerating chamber is greater than a second threshold value, and the air door is opened for a second preset time, the heater is started to heat the evaporator to perform over-temperature defrosting, wherein the first threshold value is less than the shutdown temperature of the coldest set gear of the freezing chamber, and the second threshold value is greater than the set startup temperature of the refrigerating chamber.

2. The refrigeration apparatus as set forth in claim 1 wherein the satisfaction of the preset condition further comprises, before the compressor continues to operate for more than a first preset time:

and the refrigeration equipment is electrified for more than a third preset time.

3. The refrigeration appliance of claim 1 wherein the controller is further configured to:

and if the overtemperature defrosting times are larger than or equal to a third threshold value, prompting an alarm message.

4. An evaporator anti-frosting method applied to a refrigeration apparatus according to any one of claims 1 to 3, the evaporator anti-frosting method comprising:

5. The evaporator anti-frosting method according to claim 4, wherein the meeting the preset condition further comprises, before the compressor continuously operates for more than a first preset time:

6. The evaporator anti-frosting method according to claim 4, further comprising:

7. A computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a computer, cause the computer to perform the evaporator anti-frost method of any of claims 4-6.

8. A computer program product containing instructions which, when run on a computer, cause the computer to perform the evaporator anti-frost method of any of claims 4-6.

9. A refrigeration apparatus, comprising: a processor and a memory, the memory for storing a program, the processor calling the program stored in the memory to perform the evaporator anti-frosting method according to any one of claims 4 to 6.