CN108917282A - A kind of defrosting control device and method of refrigerating display case - Google Patents
A kind of defrosting control device and method of refrigerating display case Download PDFInfo
- Publication number
- CN108917282A CN108917282A CN201810483323.9A CN201810483323A CN108917282A CN 108917282 A CN108917282 A CN 108917282A CN 201810483323 A CN201810483323 A CN 201810483323A CN 108917282 A CN108917282 A CN 108917282A
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- Prior art keywords
- defrost
- temperature
- showcase
- air
- solenoid valve
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- 238000010257 thawing Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 3
- 238000009790 rate-determining step (RDS) Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000000052 comparative effect Effects 0.000 claims description 2
- 230000008020 evaporation Effects 0.000 claims 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- 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)
- Freezers Or Refrigerated Showcases (AREA)
Abstract
The present invention relates to refrigerating display case field, a kind of refrigerating display case defrosting control device and method are disclosed.The control device includes：At least two Temperature Humidity Sensors for calculating air humidity content, and then calculate frosting degree for obtaining the dry-bulb temperature and relative humidity of air in the forward and backward air duct of evaporator；Controller, for executing following steps：Judge whether the showcase enters the defrost stage and whether terminate defrost；It directly or indirectly controls corresponding solenoid valve or/and the corresponding defrost of other components execution if meeting defrost and starting perhaps termination condition or terminates defrost movement.Technical solution of the present invention can be according to the temperature and humidity situation of air, judge the practical frosting degree of evaporator, and then automatically adjust the defrost interval time of showcase, realize defrost according to actual needs, reduce unnecessary defrost number, to reduce the external heat of defrost introducing, reduces energy consumption and in-cabinet temperature fluctuation, be conducive to the fresh-keeping of food and guarantee the quality.
Description
Technical field
The present invention relates to field of refrigeration equipments, more specifically, it relates to a kind of refrigerating display case of retailing.
Background technique
For convenient for the fresh-keeping of cargo and displaying, refrigerating display case comes into being and has undergone years development.Currently, existing
The refrigerating display case of diversified forms, such as：Island showcase, vertical show case etc..Wherein, most refrigerating display cases are equal
For providing one convenient for client's viewing and the spacial flex of selection cargo, meanwhile, need to provide opposite constant temperature for cargo
Environment, so that it can save as permanent as possible.The isoperibol is usually the environment for being lower than environment temperature, it is therefore desirable to be matched
Cooling system is prepared to meet the needs of it is to low temperature environment.
In conventional refrigerating display case design, the saturation evaporating temperature of refrigerant is in 0 DEG C Dao -35 DEG C in evaporator
Range, since temperature is lower than zero degree, the moisture in air can condense on the coil pipe and fin of evaporator to be frosted, and is therefore influenced
Heat exchange is energy.To avoid heat exchange obstructing problem caused by frosting, at interval of certain time, needs to stop process of refrigerastion and execute
Defrost pattern.During defrosting, it will introducing outside heat, (hot outside, electric heater heating or compressor are discharged
Hot gas), so that the frost on evaporator is melted into water and flow out showcase, which results in the wastes of energy.In addition, defrosting process will also
The temperature that will lead to evaporator increases, and then the air themperature in the refrigerating display case to exchange heat with it is caused to increase, this meeting
There is negative effect to some cargos (such as food) required with higher constant temperature, for example reduces the quality or fresh-keeping of food
Phase.Therefore, under the premise of guaranteeing that showcase operates normally, the fewer defrosting number the better.In common controller of display cabinet,
What defrost frequency was typically manually set, and be usually to set according to summer operating mode, can not according to seasonal variations or
Ambient temperature and humidity automatic adjustment.When ambient temperature and humidity is lower, the water capacity of air is relatively low, and frosting degree is few, but cabinet is still
According to fixed frequency defrost, this results in unnecessary energy waste and in-cabinet temperature frequent fluctuation.
Summary of the invention
It is an object of that present invention to provide a kind of refrigerating display case defrosting control devices of on-demand defrost.
The object of the invention, which also resides in, provides a kind of refrigerating display case defrosting control method of on-demand defrost.
According to an aspect of the present invention, a kind of refrigerating display case control device is provided comprising：Controller, for holding
Row following steps：Judge whether the showcase meets defrost and start or termination condition；If meeting defrost starts or terminates item
Part, controls corresponding solenoid valve or/and other components execute corresponding beginning defrost or terminate defrost movement；Temperature and humidity sensing
Device for obtaining the dry-bulb temperature of air, relative humidity in the forward and backward air duct of evaporator, and then calculates air humidity content and calculates
Evaporimeter frosting amount.
According to another aspect of the present invention, a kind of refrigerating display case defrosting control method is also provided, it is characterised in that：
It includes：S100, acquisition step obtain monitoring parameters.S200 calculates step, is calculated according to acquisition parameter other
Parameter.Monitoring parameters or the indirect parameter by being calculated are compared by S300, comparison step with preset value.S400, control
Step processed acts based on comparative result directly or indirectly to control the execution defrost of the related elements in the system, including (but
It is not limited to) close liquid supply electromagnetic valve.S500, judgment step judge whether to meet defrost termination condition.S600, rate-determining steps, when
When meeting defrost termination condition, the related elements executive termination defrost movement in the system is directly or indirectly controlled, including
(but being not limited to) opens liquid supply electromagnetic valve, restarts refrigeration cycle.
【Detailed description of the invention】
Fig. 1 is the refrigerating display case defrosting control device schematic diagram with one embodiment of the invention
Fig. 2 is the refrigerating display case defrosting control method schematic diagram with one embodiment of the invention
Component and label list
| 10 | Defrosting control device |
| 11 | Controller |
| 12 | Temperature Humidity Sensor |
| 20 | Solenoid valve |
【Specific embodiment】
Attached drawing 1 shows a kind of refrigerating display case defrosting control device 10 comprising controller 11, for executing following steps：
Judge the showcase whether meet defrost start termination condition；If meeting condition, control corresponding solenoid valve 20 or/and
Other components execute corresponding defrost start termination movement；Two Temperature Humidity Sensors 12, it is forward and backward to be separately mounted to evaporator
Air duct in, for obtaining the temperature and humidity parameter (dry-bulb temperature and relative humidity) of air.
Specifically, as shown in Fig. 2, controller 10 acquires air in the forward and backward air duct of evaporator when refrigeration cycle starts
Dry-bulb temperature and relative humidity Tin、RHin、Tout、RHout, and then look-up table is calculated or used according to air physical property formula
Find the water capacity D of airin、Dout.Frosting degree in unit time on evaporator is equal to the moisture in air after evaporator
Reduction amount.If the accumulative frosting degree by the interval time DT between the air quantity V of evaporator, defrost twice, in the DT time
It is represented by (Din-Dout) and V product integral, be represented by with formula
For purposes of illustration only, relevant parameter when indicating experiment condition with subscript ' below.
When refrigerating display case is developed, generally all needs to test by experiment and determine defrost interval time DT.Therefore, for one
A given showcase, frosting degree F ' when experiment condition can be calculated according to surveyed parameter, as the default of controller
Value, actual condition need to only calculate F when running, and relatively with preset value, as F > F ', that is, illustrate that practical frosting degree reaches
To the state for needing defrost, then it should start defrost, controller directly or indirectly closes the feed flow of refrigerant pipe road at this time
Solenoid valve, into defrost pattern.
After defrost starts, controller calculates the defrost duration automatically, when the defrost duration be greater than preset value when or
A certain defrost final temperature (such as：The dry-bulb temperature of air after evaporator) be greater than preset value when, defrost terminate, open refrigerant
Liquid supply electromagnetic valve on pipeline, restarts refrigeration cycle.
According to the Method And Principle of the invention, correlation formula can be with conversion process, used judge index when practical application
It is also possible to by fortran or simplifies obtained other direct or indirect parameters.Such as：It is considered that when showcase operation
The air quantity approximation of blower is constant, then formula F > F ' can simplify and be expressed as from calculationization
In conclusion using the defrosting control device, it can be according to the judgement evaporator of the temperature and humidity situation intelligence of ambient enviroment
How much is frosting degree, to dynamically adjust defrost interval time according to actual needs, it is (outstanding to reduce defrost number on the whole
It is in spring and autumn and winter), and then reduce the external heat of defrost introducing, reduce annual energy consumption；Decreasing simultaneously
Temperature fluctuation in showcase caused by frost is conducive to the fresh-keeping of food and guarantees the quality.
Example above primarily illustrates the principle of refrigerating display case defrosting control device and defrosting control method of the invention.
Although only some of embodiments of the present invention are described, those of ordinary skill in the art are it is to be appreciated that originally
Invention can implemented without departing from its spirit in range in many other form.Therefore, the example shown and embodiment party
Formula is considered as illustrative and not restrictive, is not departing from the spirit and scope of the present invention as defined in appended claims
In the case where, the present invention may cover various modification and replacement.
Claims (6)
1. a kind of refrigerating display case defrosting control device, which is characterized in that including：
Controller, for executing following steps：
Judge that the showcase enters or exits the defrost stage, and
If the showcase enters the defrost stage, the related elements execution defrost directly or indirectly controlled in the system is dynamic
Make, including（But it is not limited to）Close solenoid valve；If the showcase meets defrost termination condition, institute is directly or indirectly controlled
The related elements executive termination defrost movement in system is stated, including（But it is not limited to）Open solenoid valve.
2. refrigerating display case defrosting control device according to claim 1, it is characterised in that：Described device further includes：Extremely
Few two Temperature Humidity Sensors are mounted in the air duct before and after the showcase evaporator, for detecting the dry of air in air duct
Ball temperature and relative humidity.
3. a kind of refrigerating display case defrosting control method, which includes at least evaporator, evaporation fan and is mounted on feed flow
Solenoid valve on pipeline, which is characterized in that including：
Judge that the showcase enters or exits the defrost stage, and
If the showcase enters the defrost stage, the related elements execution defrost directly or indirectly controlled in the system is dynamic
Make, including（But it is not limited to）Close solenoid valve；If the showcase meets defrost termination condition, institute is directly or indirectly controlled
The related elements executive termination defrost movement in system is stated, including（But it is not limited to）Open solenoid valve；Specific steps include：
S100, acquisition step obtain monitoring parameters；
S200 calculates step, calculates other parameters according to parameter is obtained；
Monitoring parameters or the parameter by being calculated are compared by S300, comparison step with preset value；
S400, rate-determining steps execute defrost based on comparative result directly or indirectly to control the related elements in the system
Movement, including（But it is not limited to）Close solenoid valve；
S500, judgment step judge whether to meet defrost termination condition；
S600, rate-determining steps, when meeting defrost termination condition, the related elements directly or indirectly controlled in the system are held
Row terminates defrost movement, including（But it is not limited to）Solenoid valve is opened, refrigeration cycle is restarted.
4. defrosting control method according to claim 3, which is characterized in that the monitoring parameters include air dry-bulb temperature
And relative humidity；According to the air dry-bulb temperature and relative humidity, it can be deduced that the water capacity of air, and then extrapolate evaporation
The frosting degree of device or the parameter of indirect reaction frosting degree；When the parameter is higher than preset threshold section, controller executes defrost
Movement, into the defrost stage.
5. defrosting control method according to claim 3, which is characterized in that defrost termination condition includes time termination and temperature
Degree terminates, and meets either condition and terminates defrost；Time termination refers to during defrost, big when the defrost duration of detection
When being equal to the preset time, defrost is terminated；Temperature termination is to preset during defrost when the monitoring temperature is more than or equal to
When value, defrost is terminated.
6. according to right want 5 described in temperature termination condition, which is characterized in that the monitoring temperature can be air duct after evaporator
The dry-bulb temperature that middle Temperature Humidity Sensor is monitored is also possible to the evaporator somewhere monitored by other temperature sensor
Surface temperature or air themperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810483323.9A CN108917282A (en) | 2018-05-18 | 2018-05-18 | A kind of defrosting control device and method of refrigerating display case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810483323.9A CN108917282A (en) | 2018-05-18 | 2018-05-18 | A kind of defrosting control device and method of refrigerating display case |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108917282A true CN108917282A (en) | 2018-11-30 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810483323.9A Pending CN108917282A (en) | 2018-05-18 | 2018-05-18 | A kind of defrosting control device and method of refrigerating display case |
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| Country | Link |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425807A (en) * | 2019-08-09 | 2019-11-08 | 四川虹美智能科技有限公司 | A kind of apparatus for removing refrigerator frost and refrigerator defrosting method |
| CN111365930A (en) * | 2020-03-23 | 2020-07-03 | 海信（山东）冰箱有限公司 | Refrigerator and defrosting method thereof |
| CN111879052A (en) * | 2020-07-09 | 2020-11-03 | 合肥美的智能科技有限公司 | Dew removing method, control device, container, electronic device and readable storage medium |
| CN112066623A (en) * | 2020-08-27 | 2020-12-11 | 西安交通大学 | Heating power variable defrosting device of air-cooled refrigerator and control method |
| CN112378132A (en) * | 2020-11-03 | 2021-02-19 | 珠海格力电器股份有限公司 | Defrosting control device and method of air conditioner and air conditioner |
| CN114216213A (en) * | 2021-12-10 | 2022-03-22 | 珠海格力电器股份有限公司 | Defrosting control method of air conditioner and air conditioner |
| CN115325754A (en) * | 2022-08-10 | 2022-11-11 | 珠海格力电器股份有限公司 | Defrosting control method and system for refrigeration house |
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| CN110425807A (en) * | 2019-08-09 | 2019-11-08 | 四川虹美智能科技有限公司 | A kind of apparatus for removing refrigerator frost and refrigerator defrosting method |
| CN111365930A (en) * | 2020-03-23 | 2020-07-03 | 海信（山东）冰箱有限公司 | Refrigerator and defrosting method thereof |
| CN111879052A (en) * | 2020-07-09 | 2020-11-03 | 合肥美的智能科技有限公司 | Dew removing method, control device, container, electronic device and readable storage medium |
| CN112066623A (en) * | 2020-08-27 | 2020-12-11 | 西安交通大学 | Heating power variable defrosting device of air-cooled refrigerator and control method |
| CN112066623B (en) * | 2020-08-27 | 2021-07-27 | 西安交通大学 | Heating power variable defrosting device of air-cooled refrigerator and control method |
| CN112378132A (en) * | 2020-11-03 | 2021-02-19 | 珠海格力电器股份有限公司 | Defrosting control device and method of air conditioner and air conditioner |
| CN112378132B (en) * | 2020-11-03 | 2021-09-14 | 珠海格力电器股份有限公司 | Defrosting control device and method of air conditioner and air conditioner |
| CN114216213A (en) * | 2021-12-10 | 2022-03-22 | 珠海格力电器股份有限公司 | Defrosting control method of air conditioner and air conditioner |
| CN114216213B (en) * | 2021-12-10 | 2022-11-11 | 珠海格力电器股份有限公司 | Defrosting control method of air conditioner and air conditioner |
| CN115325754A (en) * | 2022-08-10 | 2022-11-11 | 珠海格力电器股份有限公司 | Defrosting control method and system for refrigeration house |
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