CN101419014A - Automatic control device for non-frost cold storage - Google Patents
Automatic control device for non-frost cold storage Download PDFInfo
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- CN101419014A CN101419014A CNA2008102380832A CN200810238083A CN101419014A CN 101419014 A CN101419014 A CN 101419014A CN A2008102380832 A CNA2008102380832 A CN A2008102380832A CN 200810238083 A CN200810238083 A CN 200810238083A CN 101419014 A CN101419014 A CN 101419014A
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- temperature
- air
- storehouse
- cooler
- refrigeration machine
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- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention discloses a frostless cool house automatic control device, which comprises a cool house temperature sensor for measuring the temperature of the cool house, a frost temperature sensor for measuring the temperature of frost on the surface of an evaporator of an air cooler, a cool house temperature secondary instrument for setting temperature bound of the cool house, a frost temperature secondary instrument for setting temperature bound of the frost, the air cooler arranged in the cool house, a refrigerator arranged outside of the cool house and a control circuit for controlling the operation of the air cooler and the refrigerator. The control device utilizes the combination of the cool house temperature and the frost temperature to control corresponding refrigeration equipment and make the refrigeration equipment operate high-efficiently without frost, and the temperature of the cool house is automatically maintained within the required temperature range. The control device has the advantages of delicate and simple structure of circuits, strong operability and low failure rate.
Description
Technical field
The present invention relates to a kind of automatic control device for non-frost cold storage.
Background technology
Present freezer Artificial Control and automatically control all be difficult to guarantee the long-pending frost operation of evaporimeter in the freezer, add heating power and carry out defrost for making the scientific and reasonable evaporating temperature of freezer evaporimeter maintenance, generally all adopting.Though this mode can reduce because of the phenomenon that the long-pending frost of evaporimeter causes refrigerating efficiency to reduce and refrigeration machine generation liquid hammer damages, temperature fluctuation in storehouse is very big and power consumption is serious.Some utilize the Cold Storage Control device avoid the control circuit complexity of the long-pending frost of evaporimeter, many with element, fault rate is higher, has also influenced the normal operation of freezer.
Summary of the invention
For solving the problem that exists in the above Cold Storage Control device, the invention provides a kind of automatic control device for non-frost cold storage, the technical scheme that it adopted is:
This control device comprise the storehouse temperature sensor of measuring the storehouse temperature, the white temperature sensor of measuring air-cooler evaporator surface frost temperature, the storehouse temperature secondary meter of setting storehouse temperature bound temperature, the white temperature bound temperature of setting white temperature secondary meter, be located at the air-cooler in the storehouse, the control circuit of being located at the refrigeration machine outside the storehouse and controlling air-cooler and refrigeration machine work, when the Ku Wen of storehouse temperature sensor mensuration reaches the ceiling temperature of storehouse temperature secondary meter setting, the entry into service of control circuit control air-cooler, this moment, in halted state, the air-cooler evaporimeter began defrost as if refrigeration machine; If refrigeration machine then descends the storehouse temperature by air-cooler cooling in the storehouse at running cooling state; When the Ku Wen of storehouse temperature sensor mensuration reached the lower limit temperature of storehouse temperature secondary meter setting, control circuit control air-cooler and refrigeration machine all shut down; When the white temperature of white temperature sensor mensuration reaches the ceiling temperature of white temperature secondary meter setting, the entry into service of control circuit control refrigeration machine, this moment if air-cooler in halted state, control circuit control refrigeration machine shuts down, not to the air-cooler cooling, this moment, under operating condition, the running of control circuit control refrigeration machine descended the storehouse temperature by air-cooler cooling in the storehouse as if air-cooler; When the white temperature of measuring when white temperature sensor reaches the lower limit temperature that white temperature secondary meter sets, though air-cooler whether in operating condition, control circuit control refrigeration machine shuts down, not to the air-cooler cooling.
The ceiling temperature of the warm secondary meter of frost is set at 0.5-5 ℃, and the lower limit temperature of its setting is than low 8-15 ℃ of storehouse temperature secondary meter lower limit temperature.
This control device utilizes the combination of temperature and Ku Nei air-cooler evaporator surface frost temperature in the storehouse that corresponding refrigeration plant is controlled, make it frostless efficient operation, the freezer automatic constant is in the temperature range that requires, according to the temperature of freezer and frosting, long-pending white situation, refrigeration machine and air-cooler are kept synchronously and the difference running status by storehouse temperature, the white temperature of evaporator surface and correspondent control circuits combination control, prevented the problem of the long-pending frost of air-cooler evaporator surface effectively, system is moved under thin white or frostless state.
This control device circuit structure exquisiteness is simple, workable, fault rate is low, cold storage cooling device is moved under the thin white and frostless state of air-cooler evaporimeter, the maximum refrigeration performance of performance refrigerating plant makes freezer have the characteristics of low energy consumption and safe and reliable operation.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is the circuit diagram of one embodiment of the invention.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1, this device comprises storehouse temperature sensor, storehouse temperature secondary meter, control circuit and the air-cooler that connects successively, comprises the white temperature sensor, white temperature secondary meter, control circuit and the refrigeration machine that connect successively simultaneously.When storehouse temperature sensor temperature-sensitive reached the ceiling temperature of its secondary meter setting, correspondent control circuits made the air-cooler entry into service in the storehouse, and this moment, the air-cooler evaporimeter began defrost if refrigeration machine is the state of shutting down; If refrigeration machine then begins cooling at running cooling state in the storehouse.When storehouse temperature sensor temperature-sensitive reached the lowest temperature that secondary meter sets, control circuit also shut down the refrigeration machine that shuts down of the air-cooler in the storehouse.The air-cooler evaporator surface temperature that records when white temperature sensor is higher than the ceiling temperature that its secondary meter is set, and correspondent control circuits makes the refrigeration machine entry into service.If air-cooler is in halted state at this moment, control circuit does not turn round refrigeration machine and also not to the air-cooler cooling, has prevented that air-cooler is under the state that shuts down, because of cooling causes evaporimeter frosting.Prevented that also the cold-producing medium evaporation in the evaporimeter is incomplete, caused refrigeration machine liquid hammer fault.If air-cooler is under operating condition at this moment, refrigeration machine turns round and by air-cooler cooling in the storehouse storehouse temperature is descended; When the temperature that records when white temperature sensor is lower than the lowest temperature of its secondary meter, illustrate that the evaporator surface frosting is serious, no matter whether air-cooler is in operating condition, correspondent control circuits all can make refrigeration machine shut down and cooling, can effectively prevent the long-pending frost of air-cooler evaporator surface too much.
According to the antistaling process requirement, set the control range of storehouse temperature secondary meter.The ceiling temperature of the warm secondary meter of frost is set at 0.5-5 ℃, and the lower limit temperature of its setting is than low 8-15 ℃ of storehouse temperature secondary meter lower limit temperature.
The course of work of an embodiment as shown in Figure 2:
1, automatic control process
General supply DK1 closure; meter switch DK2 closure; the bound of adjusting storehouse temperature secondary meter TK1 and white temperature secondary meter TK2 is in claimed range; open protection switch DK5, the DK6 of autocontrol switch SK1, SK4 and equipment such as refrigeration machine ZLD, air-cooler LFD; open gauge tap DK3 at last, cold storage cooling device promptly enters automatic running status.
When the temperature that records when the storehouse temperature sensor is higher than the temperature upper limit that secondary meter sets, among the temperature secondary meter TK1 of storehouse, go up to connect, intermediate relay ZJ adhesive successively, the ZJ1-3 closing of contact, phase line protector XBQ work, set when requiring if three phase mains has the phase failure and phase sequence not to meet, XBQ1-1 disconnects; If three phase mains does not have the phase failure and phase sequence and meets and set when requiring XBQ1-1 closure, air-cooler A.C. contactor 1C adhesive, the 1C1-3 closing of contact, air-cooler entry into service; If refrigeration machine is not during cooling, the air-cooler evaporimeter is in defrost hydrofuge state, as if refrigeration machine cooling this moment, then the air-cooler evaporimeter is in cooling state in the storehouse, therefore Ku Wen constantly drops to temperature that the storehouse temperature sensor records and is lower than under the temperature secondary meter design temperature of storehouse and prescribes a time limit, among the TK1, go up to disconnect, ZJ, ZJ1-3, XBQ1-1,1C, 1C1-3 disconnect successively, air-cooler LFD shuts down.Ku Wen stops to descend and ging up gradually.
When the storehouse temperature sensor records its temperature once more and is higher than the temperature upper limit of secondary meter TK1, repeat said process.
In the time of with storehouse temperature sensor thermometric, the temperature that air-cooler evaporator surface frost temperature sensor records is if be higher than going up in limited time of its secondary meter setting, among the warm secondary meter TK2 of frost, go up to connect, if not adhesive of air-cooler A.C. contactor 1C this moment, 1C4 is then obstructed, among the TK2, go up inoperatively, refrigeration machine does not turn round not to air-cooler evaporimeter cooling yet, device surface frosting and long-pending frost avoid evaporating.If the 1C4 of 1C adhesive this moment connects, and temperature limit switch low XWKD, pressure controller KP and comprehensive protection device ZB be when being in normal condition, refrigeration machine A.C. contactor 2C adhesive.The 2C1-3 closure, refrigeration machine ZLD entry into service, immediately to air-cooler evaporimeter cooling, white gentle storehouse temperature all descends gradually.
The temperature that records when white temperature sensor is lower than that its secondary meter TK2 sets, and following among the TK2, go up and disconnect, 2C, 2C1-3 disconnect successively in limited time, and refrigeration machine ZLD shuts down and cooling, and white gentle storehouse temperature all stops to descend.If when this moment, evaporator surface had white air-cooler to turn round, then show defrost and hydrofuge state.The lower limit of TK2 is provided with proper, the serious long-pending frost in the device surface that can avoid evaporating, and guarantee timely defrost.
Be higher than going up in limited time of its secondary meter TK2 when white temperature sensor records once more, among the TK2, go up and connect, repeat said process.When the air-cooler evaporator surface has frost, its surface frost temperature is below 0 ℃, when the upper limit of TK2 is set in more than 0 ℃, can guarantee that the air-cooler evaporimeter has under the situation of frost, refrigeration machine is not worked, and prescribes a time limit on Ku Wen reaches, and the running of air-cooler can melt the frost layer under the situation that does not add heat, when the rising of frost temperature reaches more than 0 ℃, begin kind of refrigeration cycle again.
2, the manual process of control device
This self-con-tained unit design is useful on the manual control program of maintenance and commissioning device.
Under above-mentioned automatic control state, close autocontrol switch SK1 SK4 and open air-cooler hand switch SK2,1C adhesive, 1C1-3 closure, air-cooler running.Open refrigeration machine hand switch SK3,2C adhesive, 2C1-3 closure, refrigeration machine running.
3, holding circuit
(1), the phase line protector when the phase failure, phase shortage and phase sequence change, XBQ1-1 disconnects, not adhesives such as 1C, 2C, air-cooler and refrigeration machine are not all worked.
(2), pressure controller KP disconnects under refrigeration machine pressure superelevation and low excessively state, not adhesive of 2C, refrigeration machine does not turn round.
(3), the low XWKD of temperature limit switch is the second protection to temperature of ice house, if when TK1 TK2 breaks down, when the storehouse temperature is lower than the XWKD setting value excessively, the XWKD disconnection, not adhesive of 2C, refrigeration machine does not move, and prevents that the storehouse temperature is low excessively, freezing repertory.
Claims (2)
1, a kind of automatic control device for non-frost cold storage, comprise the storehouse temperature sensor of measuring the storehouse temperature, the white temperature sensor of measuring air-cooler evaporator surface frost temperature, the storehouse temperature secondary meter of setting storehouse temperature bound temperature, the white temperature bound temperature of setting white temperature secondary meter, be located at the air-cooler in the storehouse, the control circuit of being located at the refrigeration machine outside the storehouse and controlling air-cooler and refrigeration machine work, it is characterized in that:
When the Ku Wen of storehouse temperature sensor mensuration reaches the ceiling temperature of storehouse temperature secondary meter setting, the entry into service of control circuit control air-cooler, this moment if refrigeration machine in halted state, the air-cooler evaporimeter begins defrost, if refrigeration machine then descends the storehouse temperature by air-cooler cooling in the storehouse at running cooling state;
When the Ku Wen of storehouse temperature sensor mensuration reached the lower limit temperature of storehouse temperature secondary meter setting, control circuit control air-cooler and refrigeration machine all shut down;
When the white temperature of white temperature sensor mensuration reaches the ceiling temperature of white temperature secondary meter setting, the entry into service of control circuit control refrigeration machine, this moment if air-cooler in halted state, control circuit control refrigeration machine shuts down, not to the air-cooler cooling, this moment, under operating condition, the running of control circuit control refrigeration machine descended the storehouse temperature by air-cooler cooling in the storehouse as if air-cooler;
When the white temperature of measuring when white temperature sensor reaches the lower limit temperature that white temperature secondary meter sets, though air-cooler whether in operating condition, control circuit control refrigeration machine shuts down, not to the air-cooler cooling.
2, a kind of automatic control device for non-frost cold storage according to claim 1 is characterized in that: the ceiling temperature of white temperature secondary meter is set at 0.5-5 ℃, and the lower limit temperature of its setting is than low 8-15 ℃ of storehouse temperature secondary meter lower limit temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810238083A CN100592012C (en) | 2008-12-08 | 2008-12-08 | Frostless refrigerator automatic control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810238083A CN100592012C (en) | 2008-12-08 | 2008-12-08 | Frostless refrigerator automatic control device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101419014A true CN101419014A (en) | 2009-04-29 |
| CN100592012C CN100592012C (en) | 2010-02-24 |
Family
ID=40629924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810238083A Expired - Fee Related CN100592012C (en) | 2008-12-08 | 2008-12-08 | Frostless refrigerator automatic control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100592012C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759251A (en) * | 2012-07-18 | 2012-10-31 | 广东志高空调有限公司 | Freezing and refrigerating storage/box with cloud function |
| CN109059392A (en) * | 2014-02-28 | 2018-12-21 | 株式会社电装 | Temperature adjustment stowage arrangement |
-
2008
- 2008-12-08 CN CN200810238083A patent/CN100592012C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102759251A (en) * | 2012-07-18 | 2012-10-31 | 广东志高空调有限公司 | Freezing and refrigerating storage/box with cloud function |
| CN102759251B (en) * | 2012-07-18 | 2015-08-19 | 广东志高空调有限公司 | A kind of freezer/case of band cloud function |
| CN109059392A (en) * | 2014-02-28 | 2018-12-21 | 株式会社电装 | Temperature adjustment stowage arrangement |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100592012C (en) | 2010-02-24 |
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Granted publication date: 20100224 Termination date: 20131208 |