CN1084181C - Method for controlling temperature inner show cabinet - Google Patents
Method for controlling temperature inner show cabinet Download PDFInfo
- Publication number
- CN1084181C CN1084181C CN 94119964 CN94119964A CN1084181C CN 1084181 C CN1084181 C CN 1084181C CN 94119964 CN94119964 CN 94119964 CN 94119964 A CN94119964 A CN 94119964A CN 1084181 C CN1084181 C CN 1084181C
- Authority
- CN
- China
- Prior art keywords
- temperature
- magnetic valve
- time
- temperature detection
- cabinet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The present invention relates to a method for controlling temperature in a showcase, which has the purpose that even if a temperature detecting sensor is abnormal, a refrigerant electromagnetic valve can still be switched on and off according to the state before the temperature detecting sensor is abnormal, so that the temperature in a showcase is controlled to approach to specified temperature. In the method, the latest switching time interval of the refrigerant electromagnetic valve during normal operation is stored; when the temperature detecting sensor is abnormal, the refrigerant electromagnetic valve is switched on and off according to the stored switching time interval to control the temperature in a freezing and refrigerating showcase.
Description
The present invention relates to a kind of method for controlling temperature inner show cabinet, specifically, relate to temperature data, open and close the refrigerant magnetic valve that is arranged in the refrigerating circulation system, the in-cabinet temperature of freezing and refrigeration showcase is controlled at method in the prescribed limit according to the output of at least one temperature detection sensor.
The general control freezing and refrigeration showcase in-cabinet temperature method within the specific limits that adopts is, by the measured temperature data of the temperature detection sensor that is arranged on the showcase assigned position and the relation of predefined reference temperature(TR) data, open and close the refrigerant magnetic valve of being located in the refrigerating circulation system.
Temperature data according to temperature detection sensor output comes method of temperature in the switch board like this, take place unusual in order to tackle temperature detection sensor, fault such as broken string for example need be provided with the standby mode of forcing to open and close the refrigerant magnetic valve at certain time intervals.
Existing standby mode owing to for example carry out refrigerant valve opening solenoid 3 minutes, close this duty cycle control in 7 minutes, so become temperature independently, is supercooled state in the cabinet sometimes, is sometimes and owes cold state.For example, higher cold excessively of in-cabinet temperatures such as vegetables and fruits showcase with regard to some, and freeze in-cabinet temperature such as product showcase lower just seem cold inadequately.
In addition, in the freezing and refrigeration showcase progress control method of Te Kaiping 5-272853 communique record, except that above-mentioned standby mode, also store cooler from cooling off the time that finishes to reach later set point of temperature, promptly cool off running time, even when temperature detection sensor is unusual, also can cool off operation according to the time of above-mentioned storage, in-cabinet temperature was a set point of temperature after feasible cooling finished.Even can this situation, reach in-cabinet temperature after the set point of temperature and still control basically and regulate, thereby often cause the aforementioned cold inadequately situation of cold-peace of crossing by the temperature band by the duty cycle of above-mentioned standby mode.
Therefore, the object of the present invention is to provide a kind of method for controlling temperature inner show cabinet, even temperature detection sensor takes place unusual, also can carry out the switching of refrigerant magnetic valve according to unusual state before being about to take place, in-cabinet temperature is controlled in the temperature range near set point of temperature.
In order to achieve the above object, method for controlling temperature inner show cabinet of the present invention, be a kind of by temperature data according to temperature detection sensor, the refrigerant magnetic valve in the refrigerating circulation system is located in switching, controls the method that reaches set point of temperature in the showcase cabinet, it is characterized in that, the up-to-date make-and-break time interval of described refrigerant magnetic valve during the storage normal operation, when described temperature detection sensor was unusual, the make-and-break time interval according to described storage opened and closed described refrigerant magnetic valve.
When being provided with a plurality of temperature detection sensor, the up-to-date make-and-break time of described refrigerant magnetic valve at interval when it is characterized in that storing normal operation, when any one is unusual in described a plurality of temperature detection sensor, promptly disconnect this abnormal temperature detecting sensor, temperature data according to other normal temperature detecting sensor, open and close described refrigerant magnetic valve, store the up-to-date make-and-break time of described refrigerant magnetic valve simultaneously at interval, when whole described temperature detection sensors are unusual, make-and-break time interval according to described storage opens and closes described refrigerant magnetic valve.
That is to say, the present invention is not storage cool time in memory circuit, but storage usually the opening of refrigerant magnetic valve during running, turn-off time (actual in-cabinet temperature trend approach gradually with cabinet in set temperature value be more or less the same in the service time and the turn-off time of 5 ℃ of refrigerant magnetic valves, when not containing when defrosting and cooling), tackle fault, the storage data all adopt frequent data updated, and when the temperature detection sensor fault, actual cancellation defrosting (though timer makes defrosting beginning, instantaneous recovery when sensor fault).
According to above-mentioned formation, take place when unusual at temperature detection sensor, carry out the transition to the duty cycle control that opens and closes the refrigerant magnetic valve by the make-and-break time of state before the unusual generation at interval, thereby can control, can suppress in-cabinet temperature and be changed to bottom line according to the showcase state of this moment.
And, be provided with under the situation of a plurality of temperature detection sensors, when leaving the normal temperature detecting sensor, disconnect unusual temperature detection sensor takes place, temperature data according to normal temperature detection sensor is controlled, when whole temperature detection sensors take place when unusual, because as hereinbefore, being controlled according to the data before the unusual generation, is set point of temperature so can control in-cabinet temperature.
Below the embodiment shown in reference to the accompanying drawings illustrates the present invention in more detail.
Fig. 1 is the flow chart of expression the inventive method one embodiment.
Fig. 2 is the in-cabinet temperature variation diagram when using temperature of the present invention to control.
Fig. 3 is the in-cabinet temperature variation diagram when using existing control method to control.
Fig. 4 is the block diagram of expression control part basic comprising.
The control flow of the inventive method at first is described according to Fig. 1.Check at step S1 whether temperature detection sensor is normal at first, temperature detection sensor just often, the detected in-cabinet temperature of step S2 C.T detecting sensor and in advance the input setting value, when in-cabinet temperature is lower than setting value, promptly enter step S3, keep freeze cycle refrigerant magnetic valve off state.This state is that in-cabinet temperature is in below the setting value, the state that need not to cool off.
Judge that in step 2 in-cabinet temperature is when setting value is above, at step S4 the service time (ON time) and turn-off time (OFF time) of refrigerant magnetic valve is set at predefined initial value, open the refrigerant magnetic valve at step S5, make in the cabinet to begin to cool down, promptly begin to blow out cold wind.The opening state of this refrigerant magnetic valve lasts till the ON time that sets through step S6 always.Next, check again at step S7 whether temperature detection sensor is normal, temperature detection sensor just often, in detected in-cabinet temperature of step S8 C.T detecting sensor and setting value, repeating step S6, S7, S8 up to in-cabinet temperature below setting value.
Judge that at step S8 in-cabinet temperature below setting value, promptly turn-offs the refrigerant magnetic valve at step S9.The off state of this refrigerant magnetic valve lasts till at step S10 always and is judged as through OFF time of setting, and continues until till in-cabinet temperature surpasses setting value at step S11.
Then, open the time (i.e. the ON time of this circulating cooling agent magnetic valve) of playing between turn-offing among the step S9 at step S12 storage refrigerant magnetic valve from above-mentioned steps S5, and from above-mentioned steps S9, turn-off the refrigerant magnetic valve and play the time (i.e. the OFF time of this circulating cooling agent magnetic valve) that breaks away among the step S11 between the off state, the value that step of updating S4 sets, or the value of last cycle sets.
Thus, the circulation that the refrigerant magnetic valve opens and closes finishes, and sets new ON time and OFF time simultaneously, gets back to step S5 again, opens the refrigerant magnetic valve once more.An ensuing circulation repeats above-mentioned steps S5-S12 then according to the ON time and the OFF time of being upgraded by latest data, after this just constantly as required, Yi Bian upgrade ON time and OFF time, Yi Bian carry out the switching circulation of refrigerant magnetic valve.
Judge that at abovementioned steps S1 temperature detection sensor proceeds to step S13 when unusual.This step S13 is used for cautiously checking repeatedly the unusual of temperature detection sensor, thus carry out 3 this inspections, and all judge for three times when temperature detection sensor is unusual, just proceed to step S14.
Step S14 is the step of carrying out when being provided with a plurality of temperature detection sensor, when leaving normal temperature detection sensor, just enter step S15, disconnect unusual temperature detection sensor takes place, temperature control is switched to normal temperature detection sensor, return abovementioned steps S2, repeat abovementioned steps S2-S12.
When only being provided with a temperature detection sensor, or step S14 judges when not having other normal temperature detection sensors, just enters step S16.This step S16 progressively gets off from the step S1 of normal operation before beginning, the ON time of refrigerant magnetic valve and OFF time data in the time of can't obtaining normal operation, thereby control with predefined initial value ON time and OFF time.Promptly transfer to for example respectively to open and close the duty cycle control of refrigerant magnetic valve in 90 seconds at interval.
In addition, abovementioned steps S7 judges when temperature detection sensor is unusual that just enter into step S17, S13 is identical with abovementioned steps, repeats the abnormal examination of temperature detection sensor, enters step S18 then.
Step S18 is identical step of carrying out when being provided with a plurality of temperature detection sensor with abovementioned steps S14, when leaving normal temperature detection sensor, just enter step S19, disconnect unusual temperature detection sensor takes place, temperature control is switched to normal temperature detection sensor, return abovementioned steps S8.
When only being provided with a temperature detection sensor, or when not having other normal temperature detection sensors, just enter step S20.At this step S20, transfer to the duty cycle that opens and closes the refrigerant magnetic valve according to ON time of the refrigerant magnetic valve of abovementioned steps S12 storage and OFF time and control.But in initial circulation, from step S7 branch transition, when progressively proceeding to step S20, owing to do not pass through step S12, still initial value ON time and the OFF time of being set by abovementioned steps S4 is carried out duty cycle control.
And, at abovementioned steps S12, when improper running, for example, external cause and defrost operation exceed design temperature more than 5 ℃ the time because making in-cabinet temperature rise to, avoid carrying out the renewal of refrigerant magnetic valve ON time and OFF time.Equally, when stop signal is forced in input, also to avoid upgrading ON time and OFF time.
By this control, can accomplish that the unusual front and back of temperature detection sensor almost do not have variations in temperature as shown in Figure 2.And set 3 minutes ON time in the existing standby mode for, during 7 minutes OFF time, temperature detection sensor just occurring as shown in Figure 3 unusual back in-cabinet temperature takes place changes and increases, and cools off not good enough situation.
In addition, Fig. 2 and Fig. 3 are to be 0.0 ℃ with regard to design temperature in the cabinet together, allow that the temperature difference is 0.5 ℃, and the showcase surrounding environment is under the situation of 26 ℃ of temperature, humidity 70%, measure in-cabinet temperature and change the result who draws.
Shown in Fig. 4 is the major part with control part of 2 temperature detection sensors.The central arithmetic processing apparatus (CPU) 11 of setting various programs such as above-mentioned control operation is connected with: in-cabinet temperature sensor 12 and cold wind temperature sensor 13 these two temperature detection sensors; The configuration part 14 of in-cabinet temperature; The temperature adjustment output control part 15 of open and close controlling refrigerant magnetic valve; The temperature adjustment output time operational part 16 of computing temperature adjustment output control part temperature adjustment output time; Refrigerant magnetic valve ON time that storage temperature adjustment output time operational part 16 is calculated and the memory 17 of OFF time.Be provided with in the CPU11 and judge the unusual sensor abnormality detection unit 18 of temperature detection sensor.And this CPU11 also is connected with defrosting configuration part 19 and the defrosting output control part 20 that resets that resets respectively.
CPU11 is when normal operation, the temperature data that obtains according to above-mentioned in-cabinet temperature sensor 12 and cold wind temperature sensor 13, and the reference temperature(TR) data of in-cabinet temperature configuration part 14 settings, to the switching signal of temperature adjustment output control part 15 output refrigerant magnetic valves, temperature adjustment output control part 15 opens and closes the refrigerant magnetic valve according to this switching signal.Simultaneously, temperature adjustment output time operational part 16 is calculated the switching sigtnal interval that exports temperature adjustment output control part 15 to, i.e. ON time and OFF time, by CPU11 input store 17, store up-to-date ON time and OFF time.
Sensor abnormality detection unit 18 is judged when some generations are unusual in in-cabinet temperature sensor 12 and the cold wind temperature sensor 13 in the running, CPU11 just disconnects this abnormality sensor, only, export the switching signal of refrigerant magnetic valve according to the temperature data of normal temperature detection sensor.
All take place when unusual at two temperature detection sensors, CPU11 just carries out duty cycle control according to the ON time and the OFF time of storage in the memory 11, to 15 outputs and this ON time and corresponding switching signals of OFF time of temperature adjustment output control part.
In addition, the rigging position of temperature detection sensor and quantity can suitably be set according to shape, the structure of showcase, and freeze cycle also can still adopt this used system of class freezing and refrigeration showcase in the past.
In sum, in-cabinet temperature control method of the present invention is by the record of claim 1, the up-to-date make-and-break time of refrigerant magnetic valve at interval during the storage normal operation, when temperature detection sensor is unusual, just manage make-and-break time interval according to described storage, open and close the refrigerant magnetic valve, also has record by claim 2, the up-to-date make-and-break time of refrigerant magnetic valve at interval during the storage normal operation, some when unusual in a plurality of temperature detection sensors, just disconnect the temperature detection sensor of this abnormality, temperature data according to other normal temperature detecting sensor, open and close described refrigerant magnetic valve, and the up-to-date make-and-break time interval of storing described refrigerant magnetic valve, and when whole described temperature detection sensors are unusual, manage make-and-break time interval according to described storage, open and close described refrigerant magnetic valve, so even temperature detection sensor takes place unusually, still can be according to the refrigerant magnetic valve ON time and the OFF time of state before the unusual generation, carry out duty cycle control, carry out with showcase state at that time and cool off operation accordingly, thereby can guarantee for a long time that in-cabinet temperature is near set point of temperature.Therefore, can prevent that the commodity in the showcase from damaging.
Claims (1)
1. method for controlling temperature inner show cabinet, temperature data according to a plurality of temperature detection sensors, the refrigerant magnetic valve in the refrigerating circulation system is located in switching, control in the showcase cabinet and reach set point of temperature, it is characterized in that, the up-to-date make-and-break time interval of described refrigerant magnetic valve during the storage normal operation, when any one is unusual in described a plurality of temperature detection sensors, promptly disconnect the temperature detection sensor of this abnormality, temperature data according to other normal temperature detecting sensor, open and close described refrigerant magnetic valve, store the up-to-date make-and-break time of described refrigerant magnetic valve simultaneously at interval, when whole described temperature detection sensors were unusual, the make-and-break time interval according to described storage opened and closed described refrigerant magnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94119964 CN1084181C (en) | 1994-12-27 | 1994-12-27 | Method for controlling temperature inner show cabinet |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP348485/93 | 1993-12-27 | ||
| CN 94119964 CN1084181C (en) | 1994-12-27 | 1994-12-27 | Method for controlling temperature inner show cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1107321A CN1107321A (en) | 1995-08-30 |
| CN1084181C true CN1084181C (en) | 2002-05-08 |
Family
ID=5039426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94119964 Expired - Lifetime CN1084181C (en) | 1994-12-27 | 1994-12-27 | Method for controlling temperature inner show cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1084181C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344088A (en) * | 2013-07-12 | 2013-10-09 | 合肥华凌股份有限公司 | Refrigerating device |
| CN106642883B (en) * | 2016-11-23 | 2019-05-03 | 青岛海尔股份有限公司 | Refrigerator and its refrigerating method |
| CN106610172B (en) * | 2016-11-23 | 2019-04-02 | 青岛海尔股份有限公司 | Refrigerator and its refrigerating method |
-
1994
- 1994-12-27 CN CN 94119964 patent/CN1084181C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1107321A (en) | 1995-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4993233A (en) | Demand defrost controller for refrigerated display cases | |
| KR100740051B1 (en) | Method and apparatus for refrigeration system control having electronic evaporator pressure regulators | |
| US8700444B2 (en) | System for monitoring optimal equipment operating parameters | |
| US7716936B2 (en) | Method and apparatus for affecting defrost operations for a refrigeration system | |
| US8806879B2 (en) | Method of analysing a refrigeration system and a method of controlling a refrigeration system | |
| JPH09217974A (en) | Cooler for showcase | |
| CN1084181C (en) | Method for controlling temperature inner show cabinet | |
| JPH1078281A (en) | Controlling method of internal temperature of refrigerator | |
| JP2004309130A (en) | Showcase cooling device | |
| EP2623903A1 (en) | Energy-saving system for showcase, refrigerator and freezer | |
| JP3666174B2 (en) | Showcase cooling system | |
| JP4030237B2 (en) | Case cooling system failure cause estimation device | |
| CN112665241A (en) | Frosting detection structure, condensing unit and defrosting method thereof | |
| JP2964928B2 (en) | Container refrigeration equipment | |
| JP4236371B2 (en) | Control device for refrigeration equipment | |
| JPH11211308A (en) | Control method of electric refrigerator | |
| KR100627582B1 (en) | Control method for showcase | |
| CN115406151B (en) | Instantaneous freezing control method, device and system for freezing chamber of refrigerator and refrigerator | |
| KR100207288B1 (en) | Auto-temperature control device and its method | |
| JP2000020866A (en) | Device for managing operating state of equipment | |
| JPH0252975A (en) | Cooling operation system of commodity refrigerating case | |
| CN1110675C (en) | Frost-removing method for goods show cabinet | |
| JPS63254370A (en) | Refrigerator | |
| KR970008180B1 (en) | Showcase | |
| JP2003194451A (en) | Operation control method for showcase |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CI01 | Correction of invention patent gazette |
Correction item: Priority Correct: 1993.12.27 Priority number 348485/93 Number: 19 Volume: 18 |
|
| CI03 | Correction of invention patent |
Correction item: Priority Correct: Priority day 1993.12.27 Priority number 348485/93 Number: 19 Page: The title page Volume: 18 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: PRIORITY TO: DATE OF PRIORITY 93.12.27 NUMBER OF PRIORITY 348485/93 |
|
| ERR | Gazette correction |
Free format text: CORRECT: PRIORITY; DATE OF PRIORITY 93.12.27 NUMBER OF PRIORITY 348485/93 |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141227 Granted publication date: 20020508 |