CN109059372B - Control method of water chilling unit - Google Patents
Control method of water chilling unit Download PDFInfo
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- CN109059372B CN109059372B CN201810884115.XA CN201810884115A CN109059372B CN 109059372 B CN109059372 B CN 109059372B CN 201810884115 A CN201810884115 A CN 201810884115A CN 109059372 B CN109059372 B CN 109059372B
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- water
- microprocessor
- temperature
- temperature value
- chiller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
Abstract
The invention relates to a control method of a water chilling unit, wherein the water chilling unit comprises a microprocessor, a startup and shutdown button, a display screen, a temperature sensor, a key module, an alarm and a plurality of water chilling units, and the control method of the water chilling unit comprises the following steps: step one, setting a target temperature value SV and a return difference temperature value of an environment, and marking water coolers as a # 1 water cooler, a # 2 water cooler and a # … n water cooler; step two, starting the water chiller one by one until the water chiller is in a refrigeration transition state; step three, when the temperature of the environment is less than or equal to a target temperature value SV-return difference temperature value, recording that the started water coolers are 1# water coolers-m # water coolers, and then controlling the water coolers to stop; step four, when the temperature of the environment reaches a target temperature value SV + return difference temperature value, the microprocessor controls the water chiller recorded in the step three to start refrigeration; and jumping to the third step when the temperature reaches the target temperature value SV-return difference temperature value again. The water chilling unit has high operation efficiency.
Description
Technical Field
The invention relates to the field of water coolers, in particular to a control method of a water chiller.
Background
The water cooler is a water cooling device, and is a cooling water device capable of providing constant temperature, constant flow and constant pressure. In general industrial production, a plurality of water coolers are generally required to be equipped for environmental cooling, the plurality of water coolers form a water chiller, at present, when the water chiller works, each independent water cooler always keeps a full-load working state, the power consumption of the water chiller cannot be changed according to the temperature value of the environment, the power consumption of the water chiller cannot be optimized with minimum electric energy consumption, and the operation efficiency of the water chiller is low.
Disclosure of Invention
Therefore, in order to solve the above problems, the present invention provides a control method for a chiller with high operation efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme: a control method of a water chilling unit comprises the following steps:
firstly, a worker sets a target temperature value SV and a return difference temperature value of an environment through a key module in advance, and a microprocessor automatically marks that the water coolers are a 1# water cooler, a 2# water cooler and a 3# water cooler … n # water cooler;
step two, after a startup button is pressed to start up, the 1# water chiller is started, after the 1# water chiller is started, a time delay t1s is carried out, the temperature sensor collects and stores a current temperature PV1, and then a time delay t2s is carried out, a temperature PV2 is collected and stored, the microprocessor judges the temperatures PV2 and PV1, if the temperature PV2 is smaller than the PV1, the microprocessor judges that the water chiller is in a refrigeration transition state, and the water chiller only adopts the 1# water chiller to refrigerate; if the temperature PV2 is greater than or equal to PV1, the microprocessor controls the 2# water chiller to start; after the 2# water chiller is started, a temperature PV3 is collected and stored after time delay t2s, the microprocessor judges the temperatures PV3 and PV2, if the temperature PV3 is smaller than PV2, the microprocessor judges that the water chiller is in a refrigeration transition state, and the water chiller only adopts a 1# water chiller and a 2# water chiller for refrigeration; if the temperature PV3 is greater than or equal to PV2, the microprocessor controls the 3# water chiller to start; repeating the steps until the water chilling unit is in a refrigeration state;
step three, when the temperature sensor detects that the temperature of the environment is less than or equal to a target temperature value SV-return difference temperature value of the set environment, the microprocessor records that the water coolers started at the moment are 1# water coolers-m # water coolers, m is more than or equal to 1 and less than or equal to n, and then the microprocessor controls the water coolers to stop;
step four, when the temperature sensor detects that the environment temperature reaches a target temperature value SV + return difference temperature value of the set environment, the microprocessor controls the 1# water chiller-m # water chiller recorded in the step three to start refrigeration; and when the temperature sensor of the control device detects that the environment temperature reaches the target temperature value SV-return difference temperature value of the set environment again, jumping back to the third step.
Further, in the process of executing any step from the second step to the fourth step, if the water chiller which is in starting operation or is recorded by the microprocessor in the third step has a fault, the microprocessor controls the fault water chiller to stop, and the microprocessor controls the alarm to give an alarm; if the water cooler with the fault is not the water cooler which is in operation or recorded by the microprocessor in the step three, the microprocessor controls the alarm to give an alarm.
Furthermore, in the process of executing any step from the first step to the fourth step, when the power on/off button is pressed to power off, each water chiller is powered off.
By adopting the technical scheme, the invention has the beneficial effects that: the user can input the target temperature value and the return difference temperature value of the environment through the key module, the water chilling unit controls the number of the water chilling units which are switched into the work through detecting the environment temperature, when the number of the water chilling units which are switched into the work is not enough to achieve the effect of enabling the environment to be refrigerated, the number of the water chilling units which are switched into the work is increased, and the number of the water chilling units which are switched into the work is maintained until the number of the water chilling units which are switched into the work is enough to achieve the effect of enabling the environment to be refrigerated. The refrigerating effect of the water chilling unit enables the environment temperature to be maintained between a target temperature value-return difference temperature value and a target temperature value + return difference temperature value.
Drawings
Fig. 1 is a schematic structural diagram of a water chiller according to an embodiment of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1, the present embodiment provides a control method of a water chiller, the water chiller includes a microprocessor 1, a power on/off button 2, a display screen 3, a temperature sensor 4, a key module 5, an alarm 6, and a plurality of identical water chillers 7, the power on/off button 2, the display screen 3, the temperature sensor 4, the key module 5, and the alarm 6 are respectively electrically connected to the microprocessor 1, a control system of each water chiller 7 is respectively electrically connected to the microprocessor 1, the microprocessor 1 controls each water chiller 7 to start, stop, and detect a fault of the water chiller, the microprocessor 1 employs an AT89C51 single chip microcomputer, each circuit component and each circuit module are known in the prior art,
the control method of the water chilling unit comprises the following steps:
firstly, a worker sets a target temperature value SV and a return difference temperature value of an environment through a key module 5 in advance, and a microprocessor 1 automatically marks that all water coolers are a 1# water cooler, a 2# water cooler and a 3# water cooler … n # water cooler;
step two, after a startup and shutdown button is pressed to start up the water chiller 2, the 1# water chiller is started, after the 1# water chiller is started, a temperature sensor is delayed for t1s to collect and store a current temperature PV1, and then a temperature PV2 is collected and stored after the t2s is delayed, the microprocessor 1 judges the temperatures PV2 and PV1, if the temperature PV2 is smaller than the PV1, the microprocessor 1 judges that the water chiller is in a refrigeration transition state, and the water chiller only adopts the 1# water chiller to refrigerate; if the temperature PV2 is greater than or equal to PV1, the microprocessor 1 controls the 2# water chiller to start; after the 2# water chiller is started, delaying t2s, collecting and storing a temperature PV3, judging the sizes of the temperatures PV3 and PV2 by the microprocessor 1, and if the temperature PV3 is smaller than PV2, judging that the water chiller is in a refrigeration transition state by the microprocessor 1, wherein the water chiller only adopts a 1# water chiller and a 2# water chiller for refrigeration; if the temperature PV3 is greater than or equal to PV2, the microprocessor 1 controls the 3# water chiller to start; repeating the steps until the water chilling unit is in a refrigeration state;
step three, when the temperature sensor 4 detects that the temperature of the environment is less than or equal to a target temperature value SV-return difference temperature value of the set environment, the microprocessor 1 records that the water coolers started at the moment are 1# water coolers-m # water coolers, m is more than or equal to 1 and less than or equal to n, and then the microprocessor 1 controls the water coolers 7 to stop;
step four, when the temperature sensor 4 detects that the environment temperature reaches a target temperature value SV + return difference temperature value of the set environment, the microprocessor 1 controls the 1# water chiller-m # water chiller recorded in the step three to start refrigeration; and when the temperature sensor 4 of the control device detects that the environment temperature reaches the target temperature value SV-return difference temperature value of the set environment again, jumping back to the third step.
In the process of executing any step from the second step to the fourth step, if the water chiller which is started to operate or recorded by the microprocessor 1 in the third step has a fault, the microprocessor 1 controls the water chiller 7 with the fault to stop, and the microprocessor 1 controls the alarm 6 to give an alarm to inform a worker to maintain; if the failed water chiller is not the water chiller 7 which is running or recorded by the microprocessor in the step three, the microprocessor 1 controls the alarm 6 to give an alarm.
In the process of executing any step from the first step to the fourth step, when the power-on/off button is pressed to power off the water chiller 2, each water chiller 7 is powered off. The refrigerating effect of the water chilling unit enables the environment temperature to be maintained between a target temperature value-return difference temperature value and a target temperature value + return difference temperature value.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. A control method of a water chilling unit comprises a microprocessor, a startup and shutdown button, a display screen, a temperature sensor, a key module, an alarm and a plurality of identical water chilling units, wherein the startup and shutdown button, the display screen, the temperature sensor, the key module, the alarm and the water chilling units are respectively and electrically connected with the microprocessor, and the control method of the water chilling unit is characterized by comprising the following steps:
firstly, a worker sets a target temperature value SV and a return difference temperature value of an environment through a key module in advance, and a microprocessor automatically marks that the water coolers are a 1# water cooler, a 2# water cooler and a 3# water cooler … n # water cooler;
step two, after a startup button is pressed to start up, the 1# water chiller is started, after the 1# water chiller is started, a time delay t1s is carried out, the temperature sensor collects and stores a current temperature PV1, and then a time delay t2s is carried out, a temperature PV2 is collected and stored, the microprocessor judges the temperatures PV2 and PV1, if the temperature PV2 is smaller than the PV1, the microprocessor judges that the water chiller is in a refrigeration transition state, and the water chiller only adopts the 1# water chiller to refrigerate; if the temperature PV2 is greater than or equal to PV1, the microprocessor controls the 2# water chiller to start; after the 2# water chiller is started, a temperature PV3 is collected and stored after time delay t2s, the microprocessor judges the temperatures PV3 and PV2, if the temperature PV3 is smaller than PV2, the microprocessor judges that the water chiller is in a refrigeration transition state, and the water chiller only adopts a 1# water chiller and a 2# water chiller for refrigeration; if the temperature PV3 is greater than or equal to PV2, the microprocessor controls the 3# water chiller to start; repeating the steps until the water chilling unit is in a refrigeration state;
step three, when the temperature sensor detects that the temperature of the environment is less than or equal to a target temperature value SV-return difference temperature value of the set environment, the microprocessor records that the water coolers started at the moment are 1# water coolers-m # water coolers, m is more than or equal to 1 and less than or equal to n, and then the microprocessor controls the water coolers to stop;
step four, when the temperature sensor detects that the environment temperature reaches a target temperature value SV + return difference temperature value of the set environment, the microprocessor controls the 1# water chiller-m # water chiller recorded in the step three to start refrigeration; and when the temperature sensor of the control device detects that the environment temperature reaches the target temperature value SV-return difference temperature value of the set environment again, jumping back to the third step.
2. The control method of the water chilling unit according to claim 1, wherein: in the process of executing any step from the second step to the fourth step, if the water chiller which is started to run or recorded by the microprocessor in the third step is in fault, the microprocessor controls the fault water chiller to stop, and the microprocessor controls the alarm to give an alarm; if the water cooler with the fault is not the water cooler which is in operation or recorded by the microprocessor in the step three, the microprocessor controls the alarm to give an alarm.
3. The control method of the water chilling unit according to claim 1 or 2, characterized in that: and in the process of executing any step from the first step to the fourth step, when a power-on/off button is pressed to power off, all the water coolers are powered off.
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| CN201810884115.XA CN109059372B (en) | 2018-08-06 | 2018-08-06 | Control method of water chilling unit |
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| CN109059372B true CN109059372B (en) | 2021-05-07 |
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| CN113639493B (en) * | 2021-08-13 | 2023-04-14 | 广东纽恩泰新能源科技发展有限公司 | Module control method of low-temperature air source heat pump system |
| CN114279075B (en) * | 2021-12-29 | 2023-02-10 | 博锐尚格科技股份有限公司 | Cold station startup control method and device |
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| CN106196783A (en) * | 2016-06-28 | 2016-12-07 | 青岛海尔空调电子有限公司 | The control method of a kind of module unit, control device and module unit |
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| KR100750765B1 (en) * | 2003-03-28 | 2007-08-20 | 도시바 캐리어 가부시키 가이샤 | Air conditioner |
| CN1226586C (en) * | 2003-08-22 | 2005-11-09 | 烟台荏原空调设备有限公司 | Method and device for controlling running number of connected low temperature water suppliers |
| CN102455093B (en) * | 2011-08-17 | 2013-08-28 | 李先安 | Energy efficiency controlling method for refrigerating system |
| CN103968478B (en) * | 2013-02-01 | 2018-02-23 | Lg电子株式会社 | Cooling system and its control method |
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| CN207162996U (en) * | 2017-08-02 | 2018-03-30 | 景蓓蓓 | A kind of water chilling unit system |
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| CN106196783A (en) * | 2016-06-28 | 2016-12-07 | 青岛海尔空调电子有限公司 | The control method of a kind of module unit, control device and module unit |
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