CN105526773B - The control device and control method of cold room - Google Patents
The control device and control method of cold room Download PDFInfo
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- CN105526773B CN105526773B CN201510675616.3A CN201510675616A CN105526773B CN 105526773 B CN105526773 B CN 105526773B CN 201510675616 A CN201510675616 A CN 201510675616A CN 105526773 B CN105526773 B CN 105526773B
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- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000003507 refrigerant Substances 0.000 claims description 40
- 238000001816 cooling Methods 0.000 claims description 23
- 239000007788 liquid Substances 0.000 claims description 23
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000010257 thawing Methods 0.000 abstract description 22
- 238000001704 evaporation Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 230000008020 evaporation Effects 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000010025 steaming Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Freezers Or Refrigerated Showcases (AREA)
- Defrosting Systems (AREA)
Abstract
The present invention provides the control device and control method of cold room, it is when constant temperature is cooled down with PID control carries out storehouse temperature constant control and can remain storehouse temperature constant, and interfere the growth of the frost in evaporator, the frequency that can must not reduce without defrosting extends defrost cycle time.Alternately be repeated in storehouse temperature constant control by the heat supply time as defined in expansion valve valve opening come as heat supply state heat supply process and the thermal cut-out time as defined in expansion valve valve closing become into the thermal cut-out process of thermal cut-out state.
Description
Technical field
The present invention relates in the cold room of the refrigerated show cabinet, the refrigeration sales counter that are set to shop etc. etc., inhibit the steaming of cold room
The upper frost for sending out device can prevent the control device and control method of the cold room of cooling capacity reduction.
Background technology
In the shop of supermarket, convenience store etc., use for the reach in freezer for the state display goods for freezing or refrigerating
The sales counter of platform, refrigeration sales counter etc..
As shown in Figure 1, this sales counter 30 has the display rack 32 for display goods, the outlet air to display rack blowing cold air
Mouthfuls 34 and the air with sucking display rack and the suction inlet 36 for making the fan 38 that the air of sucking recycles in sales counter 30.
In addition, in sales counter 30, general freeze cycle is used, has been had：Piping 12 is flowed for refrigerant；Expansion
Valve 14, the liquid refrigerating for being arranged in piping 12 and the liquid refrigerant after being condensed by the condenser being made to become low-temp low-pressure
Agent；And evaporator 16, it is gone forward side by side come the heat of the air of absorption cycle for gas by making the state of refrigerant change from liquid
Row cooling.
In addition, this sales counter is in the case where being arranged at shop, although it is not shown, but having compressor and condenser
Refrigerator be arranged at outside room, the case where state being connect with a refrigerator with multiple sales counters uses, is more, wherein above-mentioned
Gas refrigerant that compressor compresses come out from evaporator simultaneously becomes the gas refrigerant of high temperature and pressure, and above-mentioned condenser makes
The gas refrigerant for the high temperature and pressure that heat is discharged from compressor discharges and becomes liquid refrigerant.But it is cold there is also one
Jelly machine only connects a sales counter come the case where use.
Refrigerator is placed separately without equal sales counter and is referred to as separately installed sales counter.On the other hand, also have compressor,
The sales counter that refrigerator part is integrated as condenser, this sales counter are referred to as shape sales counter built in refrigerator or built-in shape cabinet
Platform.
The cold room of sales counter 30 etc. has control device 22, and illumination, the wind that sales counter has are controlled by control device 22
Fan 38, Defrost heater 24, anti-dew heater, expansion valve 14 (temperature control valve (TCV)) etc..
It is used as using the mechanical expansion valve for automatically regulating the degree of superheat by the pressure inside temperature sensing tube and piping
In the case of the expansion valve 14 of sales counter 30, the solenoid valve of liquid is supplied in front (freezing pusher side) setting of expansion valve 14, by
Control device 22 controls the solenoid valve to switch heat supply, thermal cut-out, and adjusts storehouse temperature.
In addition, also there is the cold room constituted as follows, that is, the valve opening of control expansion valve 14 is arranged in control device 22
Valve opening control output unit, and use the durable solenoid valve of height, electric expansion valve as expansion valve 14, is controlled by control device 22
The valve opening of expansion valve 14 processed.
Also there is following cold room, that is, using high durable solenoid valve, composition of the electric expansion valve as expansion valve 14
In the case of, also in the front of expansion valve 14 (freezing pusher side) setting supply liquid solenoid valve, is controlled and supplied by control device 22
Switch heat supply, thermal cut-out with solenoid valve to liquid, and on one side by supplying the temperature tune for cutting off control and carrying out storehouse temperature
Section uses control device 22 to pass through the expansion valve 14 in the adjusting heat supply such as degree of superheat control, storehouse temperature constant control on one side
Valve opening.But in the case where expansion valve 14 is using high durable solenoid valve, electric expansion valve with valve closing function, make
Expansion valve 14 plays the effect of supply liquid solenoid valve, and it is more to omit the case where supplying liquid solenoid valve.
As the degree of superheat detection unit for detecting the degree of superheat in evaporator 16, control device 22 has detection evaporation
Refrigeration in the inlet piping temperature sensor 18 of the temperature of refrigerant in the entrance side of device and the outlet side of detection evaporator
The outlet piping temperature sensor 20 of the temperature of agent, also, as the storehouse temperature detection unit for detecting storehouse temperature, control
Device 22 processed has the sucking of the air outlet temperature sensor 40 of the temperature of detection air port 34 and the temperature of detection suction inlet 36
Mouth temperature sensor 42.
In addition, control device 22 is both configured to using the air outlet temperature detected by air outlet temperature sensor 40
Suction inlet temperature both sides with being detected by suction inlet temperature sensor 42, are considered as storehouse temperature by their medium temperature,
Alternatively, can also be configured to the temperature sensor using only either side, and the temperature detected by the temperature sensor is added
It has gone up the value after compensation and has been considered as storehouse temperature.
Also, the temperature sensor of either side, the temperature that will be detected by air outlet temperature sensor can also be used only
Degree is used as storehouse temperature, or using the temperature detected by suction inlet temperature sensor as storehouse temperature.Only make such
In the case of obtaining storehouse temperature with the temperature sensor of either side, need not have air outlet temperature sensor and sucking
Mouth temperature sensor both sides, and only have the temperature sensor of the side used.
In the sales counter 30 constituted in this way, using will to evaporator 16 flow into refrigerant heat supply state and do not flow into refrigeration
ON/OFF control that the thermal cut-out state of agent switches to control, as disclosed in patent document 1,2 etc., by by control device
The valve opening of 22 variable expansion valves 14 makes the changes in flow rate of refrigerant, the method to control cooling capacity, to carry out cabinet
The adjusting of the storehouse temperature of platform 30.
The cooling control method of adjusting as the valve opening for carrying out expansion valve 14, there is known controlled based on the degree of superheat
Method (degree of superheat control), the method (storehouse temperature constant control) that is controlled based on storehouse temperature.
In addition, degree of superheat control, storehouse temperature constant control are controlled by the PID for being installed on the microcomputer of control device 22
System carries out.This PID control has position type PID control and velocity profile PID control, but in the present specification to velocity profile PID
The case where control, illustrates.
In degree of superheat control, the valve of variable expansion valve 14 is opened in such a way that the degree of superheat is close to defined degree of superheat setting value
Degree.
When carrying out degree of superheat control by velocity profile PID control, feelings of the proportional components in degree of superheat reduction of output are controlled
(variable quantity of the degree of superheat is negative) is the output for reducing valve opening under condition, in the increased (variation of the degree of superheat of the degree of superheat
Amount is just) it is the output for increasing valve opening.
The degree of superheat has used from the temperature (reflux piping temperature) of the refrigerant in the outlet side of evaporator 16 and has subtracted steaming
The value for sending out the temperature (evaporating temperature) of the refrigerant in the entrance side of device 16, for example, being configured to through 22 basis of control device
The evaporating temperature detected by inlet piping temperature sensor 18 and the reflux detected by outlet piping temperature sensor 20 are matched
Tube temperature degree calculates.
In addition, being configured to replace inlet piping temperature sensor 18, has the pressure of the refrigerant in detection piping 12
Low pressure in the case of capable of detecting low pressure, can be also converted into saturation by the pressure sensor (not shown) of power
The value of temperature will subtract evaporation as evaporating temperature from the reflux piping temperature detected by outlet piping temperature sensor 20
The value of temperature is as the degree of superheat.
In addition, in storehouse temperature constant control, the tune in such a way that storehouse temperature is close to defined storehouse temperature setting value
Save the valve opening of expansion valve 14.
In the case where storehouse temperature constant control is also carried out by velocity profile PID control, identically as degree of superheat control, control
The proportional components of system output are (variable quantity of storehouse temperature is negative) reduction valve opening in the case where storehouse temperature is reduced, and
(variable quantity of storehouse temperature is just) increases the output of valve opening in the case of storehouse temperature is increased.
In addition, control mode used to control the device is used as citation 1 using electric expansion valve, high durable electricity
The PID control of magnet valve, however without using electric expansion valve, high durable solenoid valve, it is installed on and has used the cold of mechanical expansion valve
But in the control device in library, ON/OFF is carried out with solenoid valve by the supply liquid of the upstream side to being installed on mechanical expansion valve
To adjust storehouse temperature.
Patent document 1：Tekiaki 59-185948 bulletins
Patent document 2：Special open 2008-209016 bulletins
However, cooling there are two the stage in the library of sales counter 30, one is the situation of the first cooling for starting sales counter, defrosting
After the case where beginning to cool etc., be cooled to storehouse temperature setting value from the state warmed up than storehouse temperature setting value in library
(pull-down) cooling is pulled down, the other is the constant temperature that storehouse temperature is maintained to defined temperature cools down.
The sales counter 30 for being especially disposed on shop etc. carries out constant temperature cooling in a long time.At this point, refrigerant flows into evaporation
Device 16, evaporator 16 become 0 DEG C hereinafter, so adhering to the moisture etc. in air in evaporator 16, to generate frost.
Lead to the reduction of cooling capacity if bloom is attached to evaporator 16, moreover, such frost continued propagation, final to steam
Sending out device 16 becomes not ventable state, cannot carry out the cooling in library, storehouse temperature is caused to rise.Upper frost serious situation
Under, also having must stop cooling down, and take out the commodity for being displayed in sales counter, carry out the operation that removal manually is attached to the frost of evaporator 16
The case where.
Therefore, have the Defrost heater 24 for removing the frost generated in evaporator 16, regularly connect the defrosting and add
The power supply of hot device 24 is defrosted (defrost) to melt frost.Such defrosting is known as heater defrosting.
On the other hand, in the relatively high sales counter of set temperature in evaporator 16 not with Defrost heater 24, not to steaming
It sends out device 16 and flows into refrigerant defrosted (defrost).Such defrosting is known as aperiodic defrosting.
By the thermal cut-out state switching for the state that refrigerant flows into the heat supply state of evaporator 16 and refrigerant does not flow into
In the ON/OFF control that controls, storehouse temperature is controlled by flowing into refrigerant/not flowing into, so storehouse temperature and ON points
It is accordingly changed with the amount of the difference (differential) of OFF points.
On the other hand, as the control of citation 1, PID control is carried out to expansion valve to adjust the side of storehouse temperature
In formula, 2 values of more than ON/OFF control, and also control is intermediate valve opening, so can reduce compared with ON/OFF control
The variation of storehouse temperature.
However, not becoming the state for not flowing into refrigerant, so without the effect of aperiodic defrost, cause to contribute to steaming
Send out the upper frost of device 1.
Therefore, in carrying out mode of the PID control to adjust storehouse temperature to expansion valve, it has to the time defrosted
It is short to be spaced (defrost cycle time), it has to which the frequency to defrost is got higher.If identical time when with ON/OFF control
In the case that interval is defrosted, it is contemplated that evaporator 16 becomes not ventable state, and it is bad to be absorbed in cooling.Moreover, super
In the case of the sales counter utilized in the shop of city, convenience store etc., if sales counter is absorbed in cooling bad and becomes in the business hours
Larger problem.
Invention content
In the present invention, in view of such present situation, carried out in library with PID control it is intended that providing when constant temperature is cooled down
Temperature constant control and storehouse temperature can be remained it is constant, and interfere in evaporator frost growth, can reduce not
The frequency without defrosting is obtained, the control device and control method of the cold room of defrost cycle time are extended.
The control device and control method of the cold room of the present invention are to use high durable solenoid valve, electronics as expansion valve
Expansion valve controls its valve opening with control device.
Specifically, the control device of the cold room of the present invention, is the piping at least flowed with refrigerant, is arranged upper
It states and is piped the expansion valve of liquid refrigerant that is upper and making the liquid refrigerant being condensed by the condenser become low-temp low-pressure, makes refrigeration
The state of agent from liquid change for gas to the air of absorption cycle heat come in the cold room of the evaporator cooled down, for controlling
Make the control device of the valve opening of above-mentioned expansion valve, which is characterized in that
Defined heat supply time that above-mentioned control device flows refrigerant in above-mentioned evaporator and refrigerant be not upper
Stating the defined thermal cut-out time flowed in evaporator is stored,
It is alternately repeated in storehouse temperature constant control by the above-mentioned expansion valve valve opening above-mentioned heat supply time and is become
The heat supply process of heat supply state and fervent by the above-mentioned expansion valve valve closing above-mentioned thermal cut-out time and as thermal cut-out state
Disconnected process.
At this point it is possible to being configured to above-mentioned control device stores the preset switching determination time,
From the beginning of cooling by the case of the above-mentioned switching determination time, being determined as the upper frost amount of above-mentioned evaporator more than rule
The above-mentioned heat supply time for being stored in above-mentioned control device and above-mentioned thermal cut-out time are changed to defined value by fixed threshold value,
It is preferred that compared with by before the above-mentioned switching determination time, the thermal cut-out time after the above-mentioned switching determination time
Ratio relative to the heat supply time is big.
In addition, the control method of the cold room of the present invention is the piping at least flowed with refrigerant, is arranged and matches above-mentioned
Become the expansion valve of the liquid refrigerant of low-temp low-pressure on pipe and by the liquid refrigerant being condensed by the condenser, make refrigerant
State from liquid change for gas to the air of absorption cycle heat come in the cold room of the evaporator cooled down, for controlling
State the control method of the valve opening of expansion valve, which is characterized in that
It is alternately repeated in storehouse temperature constant control and forms the heat supply time as defined in above-mentioned expansion valve valve opening
Become thermal cut-out state for the heat supply process of heat supply state and by the thermal cut-out time as defined in above-mentioned expansion valve valve closing
Thermal cut-out process.
At this point, can be from the beginning of cooling by the case of the preset switching determination time, being determined as above-mentioned evaporation
The upper frost amount of device is more than defined threshold value, by the above-mentioned heat supply time for being stored in above-mentioned control device and above-mentioned thermal cut-out time
It is changed to defined value.
Additionally, it is preferred that compared with by before the above-mentioned switching determination time, the thermal cut-out after the above-mentioned switching determination time
Time is big relative to the ratio of heat supply time.
According to the present invention, forcibly thermal cut-out is being carried out in storehouse temperature constant control, so as to inhibit to evaporation
Storehouse temperature is steadily maintained by storehouse temperature constant control, and can extend defrosting cycle by the upper frost of device, even if
In the case that identical time interval is defrosted when with ON/OFF control, cooling caused by frost will not be absorbed in not
It is good, it is capable of providing the high cold room of reliability.
Description of the drawings
Fig. 1 is the schematic structural diagram of the construction of the sales counter for illustrating to have control device.
Fig. 2 is the schematic structural diagram of the structure of the control device for illustrating the present embodiment.
Fig. 3 is the flow chart of the flow for illustrating the control of the thermal cut-out in the control device of the present embodiment.
In figure：12-pipings, 14-expansion valves, 16-evaporators, 18-inlet piping temperature sensors, 20-outlets are matched
Pipe temperature sensor, 22-control devices, 24-Defrost heaters, 30-sales counters, 32-display racks, 34-air outlets, 36-
Suction inlet, 38-suction fans, 40-air outlet temperature sensors, 42-suction inlet temperature sensors, 50-microcomputers,
52-power input terminals, 54-temperature sensor inputs, 56-control output ends, 58-communication terminals, 60-is aobvious
Show unit.
Specific implementation mode
Hereinafter, being based on attached drawing, embodiments of the present invention (embodiment) are illustrated in more details.
In addition, the composition of the sales counter 30 for having control device 22 in the present embodiment is and above-mentioned previous 30 base of sales counter
This identical composition.
Fig. 2 is the schematic structural diagram of the composition of the control device 22 for illustrating the present embodiment.
Control device 22 has the microcomputer 50 of calculation process for carrying out PID control etc., acts electric power for receiving
Power input terminal 52, for the temperature sensor inputs from 18,20,40,42 input temp signal of each temperature sensor
Son 54 and for expansion valve 14, fan 38, Defrost heater 24, illumination output control signal control output end 56.
In addition, for example can also have communication terminal 58 and display unit 60, wherein the communication terminal 58 for carry out with
It is uniformly controlled the communication of the host control device (not shown) of multiple sales counters 30, refrigerator etc., the display unit 60 is for showing
The state etc. of the temperature, expansion valve 14 that are detected by each temperature sensor 18,20,40,42.
The control device 22 of the present embodiment is configured to control expansion by storehouse temperature constant control when constant temperature is cooled down
Valve 14, and be alternately repeated in storehouse temperature constant control by expansion valve 14 open as defined in the heat supply time form
Become the heat of thermal cut-out state for the heat supply process of heat supply state and by the thermal cut-out time of 14 closed rule of expansion valve
Cut off operation.
In addition, in order to be set as thermal cut-out state by control device 22, the valve opening of expansion valve 14 is set as 0% and is closed
Valve, or using in the case of the not expansion valve of valve closing, it can also be other than the not expansion valve of valve closing, such as liquid will be supplied
The valve for the capableing of valve closing setting (not shown) of solenoid valve etc. is carried out in piping 12, the valve that this is capable of to valve closing by control device 22
Valve closing is to be set as thermal cut-out state.
In this way, by the way that heat supply process and thermal cut-out process are alternately repeated in storehouse temperature constant control, from
And storehouse temperature can be steadily maintained, and defrosting cycle can be extended, when with ON/OFF control between the identical time
In the case of being defrosted, it is bad that cooling caused by frost will not be absorbed in.In addition, in this specification, it will be alternately anti-
Heat supply process is carried out again and the time of thermal cut-out process is known as the defrosting cycle time.
In addition, as be described hereinafter, can also be inferred as by rule based on the upper white trend according to the type of sales counter 30 or size etc.
The fixed switching determination time, then upper frost amount was more than defined threshold value, heat supply time and thermal cut-out time was changed to defined
Value.
In addition, in the present embodiment, infers that the upper frost of evaporator 16 is measured according to the time is switched and determined, however can also constitute
Upper frost amount for evaporator 16 is the optical sensor such as using optical sensor or digital camera to the surface of evaporator 16
State is monitored that, for example, it is also possible in order to detect the air quantity by evaporator 16, setting air quantity passes before and after evaporator 16
Sensor, in the case where the air quantity by evaporator 16 is less than regulation airflow value, the upper frost amount for being inferred as evaporator 16 is more than rule
Fixed threshold value.
In addition, the degree of superheat of evaporator 16 is nearly constant in storehouse temperature constant control, so can also be configured to monitor
The degree of superheat of evaporator 16, in the case where the degree of superheat is less than the regulation degree of superheat, the upper frost amount for being inferred as evaporator 16 is more than rule
Fixed threshold value.
Hereinafter, being based on flow chart shown in Fig. 3, the thermal cut-out control of the control device 22 of the present embodiment is illustrated.
In the present embodiment, if the beginning of cooling of sales counter 30 executes thermal cut-out at a prescribed interval by control device 22
It controls (S10).
First, it is determined that control device 22 is in degree of superheat control or in storehouse temperature constant control (S20).Moreover,
In the case of being judged as YES in degree of superheat control, directly terminate thermal cut-out control (S110).
On the other hand, in the case where being judged as YES in storehouse temperature constant control, judge whether to pass through from the beginning of cooling
After preset switching determination time A (S30), heat supply time and thermal cut-out time are set according to by the time.
Without time A is switched and determined, the heat supply time is set as setting value b, the thermal cut-out time sets
It is set to setting value c (S40).
On the other hand, in the case where have passed through switching determination time A, the heat supply time is set as setting value d, earnestly
The disconnected time is set as setting value e (S50).
In addition, being switched and determined time A is the first half in order to judge defrosting cycle and later half and the setting value used, it can
It, can be in defrosting cycle with for according to the preset defrosting cycle time such as the type of sales counter 30 or size, such as half
It is suitably changed in time.
In addition, the setting value c and setting value e as the thermal cut-out time are preferably the degree that storehouse temperature less rises
The short time.
On the other hand, as the setting value b of heat supply time and setting value d, in order to cooling in library, preferably time ratio is set
Definite value c and setting value e long.
In addition, having compared with the first half of defrosting cycle, it is easy in the later half of defrosting cycle white on evaporator 16
Trend.It is therefore preferable that the later half of defrosting cycle was set as compared with the first half of defrosting cycle relative to the heat supply time
The ratio of thermal cut-out time is big.
Specifically, it is preferable that by being set as constant as the setting value c and setting value e of thermal cut-out time, for heat supply
Setting value d is set as shorter than setting value b by the time, or on the contrary, by the setting value b and setting value d as the heat supply time
It is set as constant, longer than setting value c is set as by setting value e for the thermal cut-out time.
Next, it is determined whether for (S60) in heat supply.In the case where being judged as YES in heat supply, judge whether through
Overheat service time (S70).Without the heat supply time, directly terminate thermal cut-out control (S110).
On the other hand, right by control device 22 by 14 valve closing of expansion valve in the case where have passed through the heat supply time
10 thermal cut-out of cooling device (S80) terminates thermal cut-out control (S110).
In S60, in the case of being judged as YES in thermal cut-out, judge whether by thermal cut-out time (S90).Without overheat
In the case of break time, directly terminate thermal cut-out control (S110).
On the other hand, in the case of have passed through the thermal cut-out time, by control device 22 by 14 valve opening of expansion valve, to cold
But 10 heat supply of device (S100) terminates thermal cut-out control (S110).
In this way, in storehouse temperature constant control, with defined heat supply time, thermal cut-out time-switching heat supply state
With thermal cut-out state, so as to obtain defrost effect in thermal cut-out, thus interfere evaporator 16 in frost growth, can
Extend the defrosting cycle time.
In addition, in heat supply by storehouse temperature constant control the storehouse temperature of sales counter remain it is constant, moreover, even if
Short time is set as thermal cut-out state, and storehouse temperature also less rises, so library in the action of the control device 22 of the present embodiment
Interior temperature is stably kept.
In addition, in the present embodiment, since above-mentioned reason changes heat supply in the first half and later half of defrosting cycle
Thermal cut-out time time, however may be thermal cut-out time identical heat supply time always.
Alternatively, it is also possible to be not only be arranged one be switched and determined the time and the two of the first half of defrosting cycle and later half
Stage switches, but multiple switching determination times are arranged, and defrosting cycle is got more carefully, when different heat supplies are set separately
Between the thermal cut-out time.
A preferred embodiment of the present invention is this concludes the description of, however the invention is not limited thereto, in above-described embodiment, as
One example of cold room is illustrated using the multistage sales counter for being set to shop etc., however for example, it is also possible to is suitable for
Flat shape sales counter, prefabricated cold room, prefabricated freezer etc. make various changes in the range of not departing from the purpose of the present invention.
Claims (6)
1. a kind of control device of cold room is in the cold room at least with piping, expansion valve and evaporator for controlling
Make the control device of the valve opening of above-mentioned expansion valve, wherein there is refrigerant flowing, above-mentioned expansion valve to be arranged in above-mentioned piping
In above-mentioned piping, and make the liquid refrigerant after being condensed by the condenser as the liquid refrigerant of low-temp low-pressure, above-mentioned evaporator
By making the state of refrigerant change as gas come the heat of the air of absorption cycle and be cooled down, the control of the cold room from liquid
Device processed is characterized in that,
Defined heat supply time that above-mentioned control device flows refrigerant in above-mentioned evaporator and refrigerant be not above-mentioned
The defined thermal cut-out time flowed in evaporator is stored,
It is alternately repeated in storehouse temperature constant control by the above-mentioned expansion valve valve opening above-mentioned heat supply time and is supplied as heat
Heat supply process to state and the thermal cut-out work by the above-mentioned expansion valve valve closing above-mentioned thermal cut-out time and as thermal cut-out state
Sequence.
2. the control device of cold room according to claim 1, which is characterized in that
It is configured to, above-mentioned control device stores the preset switching determination time,
From the beginning of cooling by the case of the above-mentioned switching determination time, being determined as the upper frost amount of above-mentioned evaporator more than defined
The above-mentioned heat supply time for being stored in above-mentioned control device and above-mentioned thermal cut-out time are changed to defined value by threshold value.
3. the control device of cold room according to claim 2, which is characterized in that
Compared with by before the above-mentioned switching determination time, the thermal cut-out time is relative to heat confession after the above-mentioned switching determination time
It is big to the ratio of time.
4. a kind of control method of cold room is in the cold room at least with piping, expansion valve and evaporator for controlling
Make the control method of the valve opening of above-mentioned expansion valve, wherein there is refrigerant flowing, above-mentioned expansion valve to be arranged in above-mentioned piping
In above-mentioned piping, and make the liquid refrigerant after being condensed by the condenser as the liquid refrigerant of low-temp low-pressure, above-mentioned evaporator
By making the state of refrigerant change as gas come the heat of the air of absorption cycle and be cooled down, the control of the cold room from liquid
Method processed is characterized in that,
The defined heat supply time and refrigerant flowed in above-mentioned evaporator to refrigerant are not flowed in above-mentioned evaporator
The defined thermal cut-out time stored,
It is alternately repeated in storehouse temperature constant control by the above-mentioned expansion valve valve opening above-mentioned heat supply time and is supplied as heat
Heat supply process to state and the thermal cut-out work by the above-mentioned expansion valve valve closing above-mentioned thermal cut-out time and as thermal cut-out state
Sequence.
5. the control method of cold room according to claim 4, which is characterized in that
It is more than from the beginning of cooling by the case of the preset switching determination time, being determined as the upper frost amount of above-mentioned evaporator
The above-mentioned heat supply time for being stored in control device and above-mentioned thermal cut-out time are changed to defined value by defined threshold value.
6. the control method of cold room according to claim 5, which is characterized in that
Compared with by before the above-mentioned switching determination time, the thermal cut-out time is relative to heat confession after the above-mentioned switching determination time
It is big to the ratio of time.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014-214557 | 2014-10-21 | ||
| JP2014214557A JP6180396B2 (en) | 2014-10-21 | 2014-10-21 | Control device and control method for refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105526773A CN105526773A (en) | 2016-04-27 |
| CN105526773B true CN105526773B (en) | 2018-07-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510675616.3A Active CN105526773B (en) | 2014-10-21 | 2015-10-19 | The control device and control method of cold room |
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| CN103596783A (en) * | 2011-06-10 | 2014-02-19 | Lg电子株式会社 | Air conditioner in electric vehicle |
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| GB2167543B (en) * | 1984-11-26 | 1988-09-21 | Sanden Corp | Refrigerated display cabinet |
| JPH01131879A (en) * | 1987-11-17 | 1989-05-24 | Sanyo Electric Co Ltd | Refrigerator |
| US5046324A (en) * | 1990-06-20 | 1991-09-10 | Sanyo Electric Co., Ltd. | Defrosting controller for refrigeration systems |
| US5924297A (en) * | 1997-11-03 | 1999-07-20 | Hussmann Corporation | Refrigerated merchandiser with modular evaporator coils and "no defrost" product area |
| JP4935411B2 (en) * | 2007-02-21 | 2012-05-23 | 富士電機株式会社 | Cooling system |
| CN203385256U (en) * | 2013-06-17 | 2014-01-08 | 南京天加空调设备有限公司 | Multi-split air conditioner parallel connection module system for defrosting without shutdown |
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| CN105526773A (en) | 2016-04-27 |
| JP2016080305A (en) | 2016-05-16 |
| JP6180396B2 (en) | 2017-08-16 |
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