CN110425807A - A kind of apparatus for removing refrigerator frost and refrigerator defrosting method - Google Patents
A kind of apparatus for removing refrigerator frost and refrigerator defrosting method Download PDFInfo
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- CN110425807A CN110425807A CN201910735499.3A CN201910735499A CN110425807A CN 110425807 A CN110425807 A CN 110425807A CN 201910735499 A CN201910735499 A CN 201910735499A CN 110425807 A CN110425807 A CN 110425807A
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- interface
- refrigerator
- temperature
- way valve
- evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/004—Control mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Defrosting Systems (AREA)
Abstract
The present invention provides a kind of apparatus for removing refrigerator frost and refrigerator defrosting method, which includes: four-way valve and controller；First interface on four-way valve is connected with the exhaust outlet of compressor in refrigerator；Second interface on four-way valve is connected with the evaporator in refrigerator；Third interface on four-way valve is connected with the condenser in refrigerator；The 4th interface on four-way valve is connected with the air entry of compressor；Condenser is connected with evaporator；Controller, for the defrost demand control four-way valve events according to refrigerator, when refrigerator is without defrost demand, make that first interface is connected with third interface and second interface is connected with the 4th interface, when refrigerator has defrost demand, make that first interface is connected with second interface and third interface is connected with the 4th interface.This programme can be improved the efficiency that defrost is carried out to wind cooling refrigerator.
Description
Technical field
The present invention relates to field of home appliance technology, in particular to a kind of apparatus for removing refrigerator frost and refrigerator defrosting method.
Background technique
Wind cooling refrigerator is a kind of refrigerator of cold air forced circulation, forced flow under the action of fan of the air in refrigerator,
So that uniformity of temperature profile and cooling velocity is very fast in refrigerator.Wind cooling refrigerator after a certain time of operation, evaporates in wind cooling refrigerator
The surface meeting frosting of device, the frost of evaporator surface is such as disposed not in time and will will affect the refrigeration effect of wind cooling refrigerator, thus
It needs to carry out defrost to wind cooling refrigerator in time, to remove the frosting of evaporator surface.
Currently, in order to carry out defrost to wind cooling refrigerator need that electric heating tube is being arranged close to the position of evaporator external,
Meeting radiations heat energy after electric heating tube is powered, and then defrost is carried out to evaporator using the heat that electric heating tube is radiated.
For the method for carrying out defrost to wind cooling refrigerator at present, since the position close to evaporator surface is arranged in electric heating tube
It sets, but electric heating tube can not be uniformly distributed relative to evaporator, causes the defrost speed of evaporator surface different zones different, change
The slow region of frost needs the long period that could complete defrost, so as to cause wind cooling refrigerator is carried out the efficiency of defrost compared with
It is low.
Summary of the invention
The embodiment of the invention provides a kind of apparatus for removing refrigerator frost and refrigerator defrosting method, can be improved to wind cooling refrigerator into
The efficiency of row defrost.
In a first aspect, the embodiment of the invention provides a kind of apparatus for removing refrigerator frost, comprising: four-way valve and controller；
First interface on the four-way valve is connected with the exhaust outlet of compressor in refrigerator；
Second interface on the four-way valve is connected with the evaporator in the refrigerator；
Third interface on the four-way valve is connected with the condenser in the refrigerator；
The 4th interface on the four-way valve is connected with the air entry of the compressor；
The condenser is connected with the evaporator；
The controller, for four-way valve events described in the defrost demand control according to the refrigerator, the refrigerator without
When defrost demand, make the first interface and the third interface be connected and the second interface and the fourth interface be connected
It is logical, when the refrigerator has defrost demand, the first interface is made to be connected with the second interface and the third interface
It is connected with the 4th interface.
Optionally, which further comprises: the first temperature sensor；
First temperature sensor, for temperature indoor between refrigerator described in real-time detection, and will be detected
First temperature value is sent to the controller；
The controller is further used for being passed through according to first temperature value from first temperature sensor
Following formula calculates accumulative cooling capacity, and determines the refrigerator when the calculated accumulative cooling capacity is less than preset critical cooling capacity
With defrost demand；
Q=c ρ V ∫ (Tt-T0)dt
Wherein, the specific heat capacity of the c characterization air, the ρ characterize atmospheric density, and the V characterizes the compartment of the refrigerator
Volume, the TtCharacterize first temperature value that first temperature sensor is detected in time t, the T0Characterization is used
The targeted operating temperature value of the preset refrigerator in family, the Q characterize the accumulative cooling capacity.
Optionally, which further comprises: second temperature sensor and third temperature sensor；
The second temperature sensor, for detecting the temperature of the evaporator surface, and the second temperature that will test
Value is sent to the controller；
The third temperature sensor, for detecting the temperature for flowing out the refrigerant of the evaporator, and will test
Three temperature are sent to the controller；
The controller is further used for making the first interface be connected with the second interface in the control four-way valve
Connect and after the third interface is connected with the 4th interface, judge the third temperature value and the second temperature value it
Whether difference is less than preset temperature difference threshold value, if the difference of the third temperature value and the second temperature value is less than the temperature difference
Threshold value, then controlling the four-way valve makes the first interface and the third interface be connected and the second interface and described the
Four interfaces are connected.
Optionally,
The controller is further used for after determining that the refrigerator has defrost demand, whether detects the refrigerator
Be in standby, the four-way valve events controlled when determining that the refrigerator is in standby, make the first interface with
The second interface is connected and the third interface is connected with the 4th interface.
Optionally, which further comprises: capillary, first filter and the second filter；
One end of the first filter is connected with the condenser, the other end of the first filter and the hair
One end of tubule is connected；
One end of second filter is connected with the other end of the capillary, the other end of second filter
It is connected with the evaporator.
Second aspect, the embodiment of the invention also provides a kind of based on any one of above-mentioned first aspect or first aspect
The refrigerator defrosting method of possible the provided apparatus for removing refrigerator frost of implementation, this method comprises:
Detect whether the refrigerator has defrost demand using the controller；
If the refrigerator controls the four-way valve events, connects the first interface with the third without defrost demand
Mouth is connected and the second interface and the fourth interface are connected；
If the refrigerator has defrost demand, the four-way valve events are controlled, the first interface and described second are made
Interface is connected and the third interface is connected with the 4th interface.
Optionally, described to utilize the controller when the apparatus for removing refrigerator frost includes first temperature sensor
Detect whether the refrigerator has defrost demand, comprising:
Using indoor temperature between refrigerator described in the first temperature sensor real-time detection, the first temperature value is obtained；
Calculate accumulative cooling capacity according to the following formula using the controller, wherein the formula includes:
Q=c ρ V ∫ (Tt-T0)dt
Wherein, the specific heat capacity of the c characterization air, the ρ characterize atmospheric density, and the V characterizes the compartment of the refrigerator
Volume, the TtCharacterize first temperature value that first temperature sensor is detected in time t, the T0Characterization is used
The targeted operating temperature value of the preset refrigerator in family, the Q characterize the accumulative cooling capacity；
Judge whether the accumulative cooling capacity is less than preset critical cooling capacity using the controller, if the accumulative cooling capacity is small
In the critical cooling capacity, it is determined that the refrigerator has defrost demand.
Optionally, when the apparatus for removing refrigerator frost includes the second temperature sensor and the third temperature sensor
When, in the control four-way valve events, the first interface is made to be connected with the second interface and the third interface
After being connected with the 4th interface, further comprise:
The temperature of the evaporator surface is detected using the second temperature sensor, obtains second temperature value；
The temperature that the refrigerant of the evaporator is flowed out using third temperature sensor detection, obtains third temperature value；
Judge whether the third temperature value and the difference of the second temperature value are less than preset temperature using the controller
It spends poor threshold value and controls described four if the difference of the third temperature value and the second temperature value is less than the temperature difference threshold value
Port valve movement, make the first interface and the third interface be connected and the second interface and the fourth interface be connected
It is logical.
Optionally, in the control four-way valve events, make the first interface be connected with the second interface and
Before the third interface is connected with the 4th interface, further comprise:
It detects whether the refrigerator is in standby using the controller, is determining that the refrigerator is in standby
After control the four-way valve events, so that the first interface is connected with the second interface and the third interface and described the
Four interfaces are connected.
Optionally, when the apparatus for removing refrigerator frost includes capillary, first filter and the second filter,
In the control four-way valve events, the first interface and the third interface is made to be connected and described second
After interface is connected with the 4th interface, further comprise:
The refrigerant in the condenser is set to pass sequentially through the first filter, the capillary and second filter
Into the evaporator；
In the control four-way valve events, the first interface is made to be connected with the second interface and the third
After interface is connected with the 4th interface, further comprise:
The refrigerant in the evaporator is set to pass sequentially through second filter, the capillary and the first filter
Into the condenser.
As shown from the above technical solution, when refrigerator is without defrost demand, controller makes the first interface in four-way valve and
Three interfaces are connected, and second interface is made to be connected with the 4th interface, successively lead to from the refrigerant that exhaust outlet of compressor exports at this time
It crosses after four-way valve, condenser, evaporator, four-way valve and returns to compressor from the air entry of compressor, evaporator heat absorption at this time is ice
The compartment of case freezes, and refrigerator is in normal refrigerating state.When refrigerator has defrost demand, controller makes first in four-way valve
Interface is connected with second interface, and third interface is made to be connected with the 4th interface, exports at this time from exhaust outlet of compressor cold
Matchmaker passes sequentially through and returns to compressor from the air entry of compressor after four-way valve, evaporator, condenser, four-way valve, at this time evaporator
Heat release, so as to melt the frost on evaporator.It can be seen that making the height of compressor output when refrigerator has defrost demand
Warm refrigerant enters evaporator heat release, since high temperature refrigerant is evenly distributed inside evaporator, it is ensured that evaporator surface is different
Region all has faster defrost speed, so as within a short period of time that the frostization of evaporator surface is complete, and then raising pair
The efficiency of wind cooling refrigerator progress defrost.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of schematic diagram of apparatus for removing refrigerator frost provided by one embodiment of the present invention；
Fig. 2 is the schematic diagram of another apparatus for removing refrigerator frost provided by one embodiment of the present invention；
Fig. 3 is a kind of schematic diagram of refrigeration for refrigerator state refrigerant flow direction provided by one embodiment of the present invention；
Fig. 4 is a kind of schematic diagram of refrigerator defrost state refrigerant flow direction provided by one embodiment of the present invention；
Fig. 5 is a kind of flow chart of refrigerator defrosting method provided by one embodiment of the present invention；
Fig. 6 is a kind of flow chart of refrigerator defrost demand estimation method provided by one embodiment of the present invention；
Fig. 7 is the flow chart of judgment method whether a kind of refrigerator defrost provided by one embodiment of the present invention is completed.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments, based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
As shown in Figure 1, the embodiment of the invention provides a kind of apparatus for removing refrigerator frost, the apparatus may include: four-way valve 10
With controller 20；
The refrigerator includes compressor 30, condenser 40 and evaporator 50, wherein condenser 40 is connected with evaporator 50
It connects；
First interface 101 on four-way valve 10 is connected with the exhaust outlet 301 of compressor 30；
Second interface 102 on four-way valve 10 is connected with condenser 10；
Third interface 103 on four-way valve 10 is connected with the air entry 302 of compressor 30；
Controller 20 can be acted according to the defrost demand control four-way valve 10 of refrigerator, and is made when refrigerator is without defrost demand
One interface 101 is connected with third interface 103, and second interface 102 is made to be connected with the 4th interface 104, has in refrigerator and changes
So that first interface 101 is connected when white demand with second interface 102, and third interface 103 is made to be connected with the 4th interface 104.
Apparatus for removing refrigerator frost provided in an embodiment of the present invention, controller can control four-way according to the defrost demand of refrigerator
Valve is acted accordingly.When refrigerator is without defrost demand, controller makes the first interface in four-way valve be connected with third interface
It is logical, and second interface is made to be connected with the 4th interface, four-way valve, cold is passed sequentially through from the refrigerant of exhaust outlet of compressor output at this time
Compressor is returned to from the air entry of compressor after condenser, evaporator, four-way valve, evaporator heat absorption at this time is the compartment system of refrigerator
Cold, refrigerator is in normal refrigerating state.When refrigerator has defrost demand, controller makes the first interface in four-way valve and second
Interface is connected, and third interface is made to be connected with the 4th interface, passes sequentially through at this time from the refrigerant that exhaust outlet of compressor exports
Compressor is returned to from the air entry of compressor after four-way valve, evaporator, condenser, four-way valve, at this time evaporator heat release, so as to
To melt the frost on evaporator.It can be seen that the high temperature refrigerant for exporting compressor enters steaming when refrigerator has defrost demand
Send out device heat release, since high temperature refrigerant is evenly distributed inside evaporator, it is ensured that evaporator surface different zones all have compared with
Fast defrost speed so as within a short period of time that the frostization of evaporator surface is complete, and then improved and is carried out to wind cooling refrigerator
The efficiency of defrost.
Optionally, on the basis of apparatus for removing refrigerator frost shown in Fig. 1, as shown in Fig. 2, the apparatus for removing refrigerator frost can be into one
Step includes: first filter 60, capillary 70 and the second filter 80；
One end of first filter 60 is connected with condenser 40, the other end of first filter 60 and the one of capillary 70
End is connected；
One end of second filter 80 is connected with the other end of capillary 70, the other end of the second filter 80 and evaporation
Device 50 is connected.
In embodiments of the present invention, the refrigerant when refrigerator normally freezes in condenser can enter evaporation by capillary
Device, and the refrigerant when carrying out defrost to refrigerator in evaporator can enter in condenser by capillary, in order to avoid in refrigerant
Solid impurity block capillary, first filter is connected between capillary and condenser, while in capillary and evaporator
Between connect the second filter, so that first filter can be filtered the refrigerant for entering capillary from condenser, and
Tow filtrator can be filtered the refrigerant for entering capillary from evaporator, guarantee that capillary will not block, to protect
Card refrigerator can normally freeze and defrost.
Below with reference to apparatus for removing refrigerator frost shown in Fig. 2, the defrost process of normal process of refrigerastion and refrigerator to refrigerator
It is illustrated respectively.
As shown in figure 3, when refrigerator is without defrost demand, four-way valve 10 under the control of controller 20, first interface 101 with
Third interface 103 is connected, and second interface 102 is connected with the 4th interface 104, and refrigerator is in normal refrigeration or standby shape at this time
State.
If refrigerator is in standby, refrigerant does not flow.
If refrigerator is in normal refrigerating state, refrigerant will be flowed according to direction shown in arrow in Fig. 3.Specifically, cold
Matchmaker is discharged after the compression of compressor 30 from exhaust outlet 301, and refrigerant enters four-way valve 10, Zhi Houleng by first interface 101 later
Matchmaker enters condenser 40 after the discharge of the third interface 103 of four-way valve 10, and refrigerant successively passes through after the discharge of condenser 40 later
First filter 60, capillary 70 and the second filter 80 and enter evaporator 50, refrigerant passes through the after the heat absorption of evaporator 50
Two interfaces 102 enter four-way valve 10, and refrigerant returns to after the discharge of the 4th interface 104 of four-way valve 10 from air entry 302 later
Compressor 30.
When refrigerator is in normal refrigerating state, the refrigerant being discharged from compressor 30 successively passes through four-way valve 10, condenser
40, compressor 30 is returned to after first filter 60, capillary 70, the second filter 80, evaporator 50 and four-way valve 10, at this time
Refrigerant absorbs heat in evaporator 50, reduces by 50 peripheral temperature of evaporator, is the different compartment refrigeration of refrigerator.
As shown in figure 4, when refrigerator have defrost demand when, four-way valve 10 under the control of controller 20, second interface 101
It is connected with second interface 102, third interface 103 is connected with the 4th interface 104, and refrigerator is in defrost state, refrigerant at this time
It will be flowed according to direction shown in arrow in Fig. 4.Specifically, refrigerant is discharged after the compression of compressor 30 from exhaust outlet 301, later
Refrigerant enters four-way valve 10 by first interface 101, and refrigerant enters evaporation after the exclusion of the second interface 102 of four-way valve 10 later
Device 50, refrigerant successively enter cold by the second filter 80, capillary 70 and first filter 60 after 50 heat release of evaporator
Condenser 40, refrigerant enters four-way valve 10 by third interface 103 after the discharge of condenser 40 later, and refrigerant is from four-way valve 10 later
The 4th interface 104 discharge after from air entry 302 return to compressor 30.
When refrigerator is in defrost state, the refrigerant being discharged from compressor 30 successively passes through four-way valve 10, evaporator 50, the
Compressor 30 is returned to after tow filtrator 80, capillary 70, first filter 60, condenser 40 and four-way valve 10, at this time refrigerant
In 50 heat release of evaporator, the temperature of 50 shell of evaporator is promoted, and then melts the frost on evaporator 50.
It should be noted that in apparatus for removing refrigerator frost shown in Fig. 1 to Fig. 4, except logical between four-way valve 10 and controller 20
It crosses cable or data line is connected outside, be connected by being used for transmission the pipeline of refrigerant between other connected components.
It is further to note that including relay in four-way valve 10, controller 20 can be real by control relay
The opening and closing of existing four-way valve 10.Specifically, when refrigerator is in normal refrigeration or standby mode, controller 20 is not to relay
Device is powered, and the sliding block in four-way valve 10 is not by the attraction of relay, and four-way valve 10 is in close state at this time, first interface
101 are connected with third interface 103, and second interface 102 is connected with the 4th interface 104.When refrigerator is in defrost state, control
Device 20 processed is powered to relay, the sliding block in four-way valve 10 by relay attraction and be subjected to displacement, at this time at four-way valve 10
In open state, first interface 101 is connected with second interface 102, and third interface 103 is connected with the 4th interface 104.
Optionally, on the basis of apparatus for removing refrigerator frost shown in Fig. 1, which can further include
One temperature sensor, the first temperature sensor can be with the temperature in real-time detection refrigerator compartment, and the first temperature that will test
Value is sent to controller 20, and then controller 20 can determine refrigerator according to the first temperature value from the first temperature sensor
Whether there is defrost demand.
Specifically, controller 20, can be by as follows after receiving the first temperature value from the first temperature sensor
Formula determines whether refrigerator has defrost demand according to calculated accumulative cooling capacity to calculate accumulative cooling capacity.Wherein, it is used for
Calculate the formula of accumulative cooling capacity are as follows:
Q=c ρ V ∫ (Tt-T0)dt
In above-mentioned formula, c characterizes the specific heat capacity of air, and ρ characterizes atmospheric density, and V characterizes the volume of the compartment of refrigerator, Tt
Characterize the first temperature value that the first temperature sensor is detected in time t, T0Characterize the target operation temperature of the refrigerator of user preset
Angle value, Q characterize accumulative cooling capacity.
It is preset to judge whether the calculated accumulative cooling capacity of institute is less than after calculating accumulative cooling capacity for controller 20
Critical cooling capacity, if calculated accumulative cooling capacity is less than critical cooling capacity, it is determined that refrigerator has defrost demand, otherwise determines refrigerator
Without defrost demand.
In embodiments of the present invention, by the temperature in first sensor real-time detection refrigerator compartment, controller is each
It is secondary receive the first temperature value detected by first sensor after, accumulative cooling capacity is calculated according to the first temperature value, due to evaporation
Temperature after device frosting in refrigerator compartment will be lower than target temperature set by user, so calculated accumulative cooling capacity is negative value,
After accumulative cooling capacity is less than preset critical cooling capacity, illustrate that the frost tied on evaporator has reached a certain amount of, in turn
Determine that refrigerator has defrost demand.
In embodiments of the present invention, accumulative cooling capacity is calculated by the temperature in real-time detection refrigerator compartment, according to accumulative
Cooling capacity determines the amount of frosting on evaporator, and then determines whether refrigerator has defrost demand, guarantees accurately to judge ice
Whether case has defrost demand, and then can carry out defrost processing to refrigerator in time when refrigerator needs defrost, it can guarantees
Refrigerator can be run according to target temperature set by user, and can be caused to avoid defrost processing is carried out in no defrost demand
Energy waste.
Optionally, on the basis of apparatus for removing refrigerator frost shown in Fig. 1, which can further include
Two temperature sensors and third temperature sensor, second temperature sensor can detecte the temperature on 50 surface of evaporator and obtain
Two temperature values, third temperature sensor can detecte the temperature of the refrigerant of outflow evaporator 50 and obtain third temperature value, in turn
Controller 20 can be according to the second temperature value that second temperature sensor detects and third temperature that 3rd sensor detects
Value come determine 50 surface of evaporator frost whether changed.
Specifically, controller 20 makes that first interface 101 is connected with second interface 102 and third connects in control four-way valve 10
Mouthfuls 103 are connected with the 4th interface 104, start to after the progress defrost processing of evaporator 50, when controller 20 comes from receiving
After the second temperature value of second temperature sensor and third temperature from third temperature sensor, controller 20 be may determine that
Whether the difference of third temperature value and second temperature value is less than preset temperature difference threshold value, if third temperature value and second temperature value
Difference be greater than or equal to temperature difference threshold value, it is determined that defrost does not complete also, and four-way valve 10 remains at current state, if the
The difference of three temperature values and second temperature value is less than temperature difference threshold value, it is determined that defrost has been completed, and controller 20 controls four-way valve
10 movements, so that the first interface 101 in four-way valve 10 is connected with third interface 103 and second interface 102 and the 4th interface
104 are connected, so that refrigerator be made to return to the working condition normally freezed.
It in embodiments of the present invention, can by detecting the temperature of the temperature of evaporator surface and the refrigerant of outflow evaporator
To determine evaporator whether still in the state largely absorbed heat, if evaporator still in the state largely absorbed heat, illustrates to evaporate
The frost on device surface has been changed not yet, instead if the frost of evaporator surface has been changed, the temperature and outflow of evaporator surface
The temperature of the refrigerant of evaporator answers approximation, so as to accurately judge whether defrost has been completed, and then in determinization
Restore refrigerator to normal refrigeration work state after the completion of frost, prevents from storing article in refrigerator compartment due to being in for a long time
Higher temperature and go bad.
Optionally, on the basis of apparatus for removing refrigerator frost shown in Fig. 1, controller 20 determine refrigerator have defrost demand it
Afterwards, it can further detect whether refrigerator is in standby, then control four-way valve 10 after determining that refrigerator is in standby
Movement makes the first interface 101 on four-way valve 10 be connected with second interface 102 and 104 phase of third interface 103 and the 4th interface
Connection starts to carry out defrost to refrigerator.If refrigerator is in normal refrigerating state, it may wait for refrigerator and enter after standby mode again
Start to carry out defrost to refrigerator.
In embodiments of the present invention, when controller determine refrigerator have defrost demand after, controller can wait refrigerator into
Start to control four-way valve events again after entering standby mode, so that refrigerator enters defrost state, when being in standby due to refrigerator
Refrigerant remains static, and so that refrigerant reverse flow is can reduce the impact that compressor is subject at this time, and can not influence ice
Defrost is completed between case under the premise of room temperature, guarantees that the storage temperature in refrigerator compartment will not be increased excessively.
As shown in figure 5, one embodiment of the invention provides one kind based on above-mentioned the provided refrigerator of any one embodiment
The refrigerator defrosting method of defrosting device, this method may include steps of:
Step 501: whether there is defrost demand using controller detection refrigerator, if so, executing step 502, otherwise hold
Row step 503；
Step 502: controlling four-way valve events using controller, first interface is made to be connected with third interface and second interface
It is connected with the 4th interface, and terminates current process；
Step 503: controlling four-way valve events using controller, first interface is made to be connected with second interface and third interface
It is connected with the 4th interface.
In embodiments of the present invention, the opening and closing of four-way valve be can control using controller, to realize refrigerant just
To flowing or reverse flow, makes refrigerant reverse flow so as to control four-way valve when with defrost demand, reach defrost
Purpose, and four-way valve is controlled in no defrost demand makes refrigerant forward flow, so that refrigerator is in normal refrigeration work state.By
In by refrigerant, the frost of evaporator surface is melted in heat release inside evaporator so that evaporator surface different location all have compared with
Fast defrost speed improves the efficiency that defrost is carried out to refrigerator so as to the time needed for shortening defrost.
Optionally, on the basis of refrigerator defrosting method shown in Fig. 5, when the refrigerator defrost that the refrigerator defrosting method is based on
When device includes the first temperature sensor, as shown in fig. 6, step 501 determines whether refrigerator there is defrost demand can pass through
Following steps are realized:
Step 601: using indoor temperature between the first temperature sensor real-time detection refrigerator, obtaining the first temperature value；
Step 602: calculating accumulative cooling capacity using controller；
Specifically, accumulative cooling capacity is calculated by following formula using controller:
Q=c ρ V ∫ (Tt-T0)dt
Wherein, c characterizes the specific heat capacity of air, and ρ characterizes atmospheric density, and V characterizes the volume of the compartment of refrigerator, TtCharacterization first
The first temperature value that temperature sensor is detected in time t, T0Characterize the targeted operating temperature value of the refrigerator of user preset, Q table
Levy accumulative cooling capacity；
Step 603: judging whether accumulative cooling capacity is less than preset critical cooling capacity using controller, if so, executing step
604, it is no to then follow the steps 605；
Step 604: determining that refrigerator has defrost demand, and terminate current process；
Step 605: determining refrigerator without defrost demand.
In embodiments of the present invention, it using the temperature in the first temperature sensor real-time detection refrigerator compartment, and then utilizes
Controller calculates accumulative cooling capacity according to the first temperature value that the first temperature sensor detects, according to calculated accumulative cooling capacity
It determines whether refrigerator has defrost demand, accumulative cooling capacity is determined based on the variation of refrigerator compartment temperature, then according to accumulative
Cooling capacity determines whether evaporator has caused refrigerator compartment temperature relatively low for a long time due to frosting, so as to accurately determine
Whether refrigerator has defrost demand.
Optionally, on the basis of refrigerator defrosting method shown in Fig. 5, when the refrigerator being based on when the refrigerator defrosting method
When white device includes the first temperature sensor and second temperature sensor, after step 502 starts to carry out defrost to refrigerator,
It may determine that whether refrigerator defrost is completed, and then so that refrigerator is returned to normal refrigeration work state after the completion of defrost.Such as Fig. 7 institute
Show, the method for judging whether defrost is completed may include steps of:
Step 701: using the temperature of second temperature sensor detection evaporator surface, obtaining second temperature value；
Step 702: detecting the temperature of the refrigerant of outflow evaporator using third temperature sensor, obtain third temperature value；
Step 703: judging whether the difference of third temperature value and second temperature value is less than preset temperature difference using controller
Threshold value, if so, step 704 is executed, it is no to then follow the steps 701；
Step 704: control four-way valve events make first interface be connected with third interface and second interface and the 4th interface
It is connected.
In embodiments of the present invention, using the temperature of second temperature sensor detection evaporator surface, third temperature is utilized
The temperature of the refrigerant of sensor detection outflow evaporator, and then the second temperature value that is detected according to second temperature sensor and the
The third temperature value that three-temperature sensor detects can determine the whether still a large amount of heat absorptions of evaporator, if evaporator is still largely inhaled
Heat illustrates that the frost of evaporator surface has been changed not yet, and the frost of evaporator surface has been illustrated if evaporator does not absorb heat largely
Through having changed, thus after starting to carry out refrigerator defrost can accurate judgement defrost whether completed, and then make refrigerator as early as possible
Restore to normal refrigeration work state, guarantees the freshness of article in refrigerator.
Optionally, on the basis of refrigerator defrosting method shown in Fig. 5, after step 502 starts to carry out defrost to refrigerator,
It can use whether controller detection refrigerator is in standby first, controlled after determining that refrigerator has been in standby
Four-way valve events, make that first interface is connected with second interface and third interface is connected with the 4th interface, to start to carry out
Defrost processing, refrigerant remains static when being in standby due to refrigerator, and refrigerant reverse flow is made to can reduce pressure at this time
The impact that contracting machine is subject to, and defrost can be completed under the premise of not influencing temperature in refrigerator compartment, guarantee in refrigerator compartment
Storage temperature will not be increased excessively.
Optionally, on the basis of refrigerator defrosting method shown in Fig. 5, when the refrigerator defrost that the refrigerator defrosting method is based on
When device includes capillary, first filter and the second filter as shown in Figure 2, step 502 controls four-way valve events and opens
When beginning defrost, the refrigerant in condenser can be made to pass sequentially through first filter, capillary and the second filter and enter evaporator,
And step 503 control four-way valve is when terminating defrost, can make the refrigerant in evaporator pass sequentially through the second filter, capillary and
First filter enters condenser, when refrigerant forward flow and reverse flow enter capillary before have filter to refrigerant into
Row filtering, it is possible to prevente effectively from capillary is blocked.
In conclusion at least having such as described in the apparatus for removing refrigerator frost of each embodiment offer of the present invention and refrigerator defrost
It is lower the utility model has the advantages that
1, in embodiments of the present invention, when refrigerator is without defrost demand, controller makes the first interface in four-way valve and
Three interfaces are connected, and second interface is made to be connected with the 4th interface, successively lead to from the refrigerant that exhaust outlet of compressor exports at this time
It crosses after four-way valve, condenser, evaporator, four-way valve and returns to compressor from the air entry of compressor, evaporator heat absorption at this time is ice
The compartment of case freezes, and refrigerator is in normal refrigerating state.When refrigerator has defrost demand, controller makes first in four-way valve
Interface is connected with second interface, and third interface is made to be connected with the 4th interface, exports at this time from exhaust outlet of compressor cold
Matchmaker passes sequentially through and returns to compressor from the air entry of compressor after four-way valve, evaporator, condenser, four-way valve, at this time evaporator
Heat release, so as to melt the frost on evaporator.It can be seen that making the height of compressor output when refrigerator has defrost demand
Warm refrigerant enters evaporator heat release, since high temperature refrigerant is evenly distributed inside evaporator, it is ensured that evaporator surface is different
Region all has faster defrost speed, so as within a short period of time that the frostization of evaporator surface is complete, and then raising pair
The efficiency of wind cooling refrigerator progress defrost.
2, in embodiments of the present invention, the refrigerant when refrigerator normally freezes in condenser can enter evaporation by capillary
Device, and the refrigerant when carrying out defrost to refrigerator in evaporator can enter in condenser by capillary, in order to avoid in refrigerant
Solid impurity block capillary, first filter is connected between capillary and condenser, while in capillary and evaporator
Between connect the second filter, so that first filter can be filtered the refrigerant for entering capillary from condenser, and
Tow filtrator can be filtered the refrigerant for entering capillary from evaporator, guarantee that capillary will not block, to protect
Card refrigerator can normally freeze and defrost.
3, accumulative cooling capacity in embodiments of the present invention, is calculated by the temperature in real-time detection refrigerator compartment, according to tired
Cooling capacity is counted to determine the amount of frosting on evaporator, and then determines whether refrigerator has defrost demand, guarantees accurately to judge
Whether refrigerator has defrost demand, and then can carry out defrost processing to refrigerator in time when refrigerator needs defrost, it can protects
Card refrigerator can be run according to target temperature set by user, and can be led to avoid defrost processing is carried out in no defrost demand
The energy waste of cause.
4, in embodiments of the present invention, by detecting the temperature of the temperature of evaporator surface and the refrigerant of outflow evaporator,
Evaporator can be determined whether still in the state largely absorbed heat, if evaporator still in the state largely absorbed heat, illustrates to steam
The frost on hair device surface has been changed not yet, instead if the frost of evaporator surface has been changed, the temperature and stream of evaporator surface
The temperature of the refrigerant of evaporator answers approximation out, so as to accurately judge whether defrost has been completed, and then in determination
Restore refrigerator to normal refrigeration work state after the completion of defrost, prevents in refrigerator compartment storage article due at for a long time
Go bad in higher temperature.
5, in embodiments of the present invention, after controller determines that refrigerator has defrost demand, controller can wait refrigerator
Start to control four-way valve events again after into standby mode, so that refrigerator enters defrost state, since refrigerator is in standby
When refrigerant remain static, so that refrigerant reverse flow is can reduce the impact that compressor is subject at this time, and can not influence
Defrost is completed in refrigerator compartment under the premise of temperature, guarantees that the storage temperature in refrigerator compartment will not be increased excessively.
It should be noted that, in this document, such as first and second etc relational terms are used merely to an entity
Or operation is distinguished with another entity or operation, is existed without necessarily requiring or implying between these entities or operation
Any actual relationship or order.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-
It is exclusive to include, so that the process, method, article or equipment for including a series of elements not only includes those elements,
It but also including other elements that are not explicitly listed, or further include solid by this process, method, article or equipment
Some elements.In the absence of more restrictions, the element limited by sentence " including one ", is not arranged
Except there is also other identical factors in the process, method, article or apparatus that includes the element.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can store in computer-readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
In the various media that can store program code such as disk.
Finally, it should be noted that the foregoing is merely presently preferred embodiments of the present invention, it is merely to illustrate skill of the invention
Art scheme, is not intended to limit the scope of the present invention.Any modification for being made all within the spirits and principles of the present invention,
Equivalent replacement, improvement etc., are included within the scope of protection of the present invention.
Claims (10)
1. a kind of apparatus for removing refrigerator frost characterized by comprising four-way valve and controller；
First interface on the four-way valve is connected with the exhaust outlet of compressor in refrigerator；
Second interface on the four-way valve is connected with the evaporator in the refrigerator；
Third interface on the four-way valve is connected with the condenser in the refrigerator；
The 4th interface on the four-way valve is connected with the air entry of the compressor；
The condenser is connected with the evaporator；
The controller, for four-way valve events described in the defrost demand control according to the refrigerator, in the refrigerator without defrost
When demand, make that the first interface and the third interface are connected and the second interface and the fourth interface are connected,
When the refrigerator has defrost demand, the first interface is made to be connected with the second interface and the third interface and institute
The 4th interface is stated to be connected.
2. the apparatus according to claim 1, which is characterized in that further comprise: the first temperature sensor；
First temperature sensor, for temperature indoor between refrigerator described in real-time detection, and by detected first
Temperature value is sent to the controller；
The controller is further used for according to first temperature value from first temperature sensor, by as follows
Formula calculates accumulative cooling capacity, and determines that the refrigerator has when the calculated accumulative cooling capacity is less than preset critical cooling capacity
Defrost demand；
Q=c ρ V ∫ (Tt-T0)dt
Wherein, the specific heat capacity of the c characterization air, the ρ characterize atmospheric density, and the V characterizes the appearance of the compartment of the refrigerator
Product, the TtCharacterize first temperature value that first temperature sensor is detected in time t, the T0It is pre- to characterize user
If the refrigerator targeted operating temperature value, the Q characterizes the accumulative cooling capacity.
3. the apparatus according to claim 1, which is characterized in that further comprise: second temperature sensor and third temperature
Sensor；
The second temperature sensor, for detecting the temperature of the evaporator surface, and the second temperature value hair that will test
Give the controller；
The third temperature sensor, for detecting the temperature for flowing out the refrigerant of the evaporator, and the third temperature that will test
Degree is sent to the controller；
The controller, be further used for control the four-way valve make the first interface be connected with the second interface and
After the third interface is connected with the 4th interface, judge that the difference of the third temperature value and the second temperature value is
It is no to be less than preset temperature difference threshold value, if the difference of the third temperature value and the second temperature value is less than the temperature difference threshold
Value, then controlling the four-way valve makes the first interface and the third interface be connected and the second interface and the described 4th
Interface is connected.
4. the apparatus according to claim 1, which is characterized in that
The controller is further used for after determining that the refrigerator has defrost demand, detects whether the refrigerator is in
Standby mode controls the four-way valve events when determining that the refrigerator is in standby, make the first interface with it is described
Second interface is connected and the third interface is connected with the 4th interface.
5. according to claim 1 to any device in 4, which is characterized in that further comprise: capillary, the first filtering
Device and the second filter；
One end of the first filter is connected with the condenser, the other end of the first filter and the capillary
One end be connected；
One end of second filter is connected with the other end of the capillary, the other end of second filter and institute
Evaporator is stated to be connected.
6. a kind of refrigerator defrosting method based on the apparatus for removing refrigerator frost any in claim 1 to 5, which is characterized in that packet
It includes:
Detect whether the refrigerator has defrost demand using the controller；
If the refrigerator controls the four-way valve events, makes the first interface and the third interface phase without defrost demand
It is connected to and the second interface and the fourth interface is connected；
If the refrigerator has defrost demand, the four-way valve events are controlled, the first interface and the second interface are made
It is connected and the third interface is connected with the 4th interface.
7. according to the method described in claim 6, it is characterized in that, when the apparatus for removing refrigerator frost includes that first temperature passes
It is described to detect whether the refrigerator has defrost demand using the controller when sensor, comprising:
Using indoor temperature between refrigerator described in the first temperature sensor real-time detection, the first temperature value is obtained；
Calculate accumulative cooling capacity according to the following formula using the controller, wherein the formula includes:
Q=c ρ V ∫ (Tt-T0)dt
Wherein, the specific heat capacity of the c characterization air, the ρ characterize atmospheric density, and the V characterizes the appearance of the compartment of the refrigerator
Product, the TtCharacterize first temperature value that first temperature sensor is detected in time t, the T0It is pre- to characterize user
If the refrigerator targeted operating temperature value, the Q characterizes the accumulative cooling capacity；
Judge whether the accumulative cooling capacity is less than preset critical cooling capacity using the controller, if the accumulative cooling capacity is less than institute
State critical cooling capacity, it is determined that the refrigerator has defrost demand.
8. according to the method described in claim 6, it is characterized in that, when the apparatus for removing refrigerator frost includes that the second temperature passes
When sensor and the third temperature sensor, in the control four-way valve events, make the first interface and described second
After interface is connected and the third interface is connected with the 4th interface, further comprise:
The temperature of the evaporator surface is detected using the second temperature sensor, obtains second temperature value；
The temperature that the refrigerant of the evaporator is flowed out using third temperature sensor detection, obtains third temperature value；
Judge whether the third temperature value and the difference of the second temperature value are less than preset temperature difference using the controller
Threshold value controls the four-way valve if the difference of the third temperature value and the second temperature value is less than the temperature difference threshold value
Movement, makes that the first interface and the third interface are connected and the second interface and the fourth interface are connected.
9. according to the method described in claim 6, it is characterized in that, making described first in the control four-way valve events
Before interface is connected with the second interface and the third interface is connected with the 4th interface, further comprise:
It detects whether the refrigerator is in standby using the controller, is controlled after determining that the refrigerator is in standby
The four-way valve events are made, make that the first interface is connected with the second interface and the third interface connects with the described 4th
Mouth is connected.
10. according to the method any in claim 6 to 9, which is characterized in that when the apparatus for removing refrigerator frost includes capillary
When pipe, first filter and the second filter,
In the control four-way valve events, the first interface and the third interface is made to be connected and the second interface
After being connected with the 4th interface, further comprise:
Make the refrigerant in the condenser pass sequentially through the first filter, the capillary and second filter to enter
The evaporator；
In the control four-way valve events, the first interface is made to be connected with the second interface and the third interface
After being connected with the 4th interface, further comprise:
Make the refrigerant in the evaporator pass sequentially through second filter, the capillary and the first filter to enter
The condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735499.3A CN110425807A (en) | 2019-08-09 | 2019-08-09 | A kind of apparatus for removing refrigerator frost and refrigerator defrosting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735499.3A CN110425807A (en) | 2019-08-09 | 2019-08-09 | A kind of apparatus for removing refrigerator frost and refrigerator defrosting method |
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| Publication Number | Publication Date |
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| CN110425807A true CN110425807A (en) | 2019-11-08 |
Family
ID=68413683
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910735499.3A Withdrawn CN110425807A (en) | 2019-08-09 | 2019-08-09 | A kind of apparatus for removing refrigerator frost and refrigerator defrosting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111947377A (en) * | 2020-08-19 | 2020-11-17 | 珠海格力电器股份有限公司 | Diversified refrigeration equipment and control method and device thereof |
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| CN2497245Y (en) * | 2001-08-15 | 2002-06-26 | 广东科龙电器股份有限公司 | Hot-gas defrosting refrigerator |
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