CN111336706B - Large and small compressor combined mixed working medium refrigerating system and control method thereof - Google Patents
Large and small compressor combined mixed working medium refrigerating system and control method thereof Download PDFInfo
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- CN111336706B CN111336706B CN202010146476.1A CN202010146476A CN111336706B CN 111336706 B CN111336706 B CN 111336706B CN 202010146476 A CN202010146476 A CN 202010146476A CN 111336706 B CN111336706 B CN 111336706B
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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
- F25B6/00—Compression machines, plants or systems, with several condenser circuits
- F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
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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
- F25B31/00—Compressor arrangements
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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
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a mixed working medium refrigerating system with a large compressor and a small compressor combined, and relates to the technical field of refrigerating equipment. The invention includes a refrigeration unit; the refrigerating unit comprises a compressor A and a compressor B which are connected in parallel; two ends of the compressor A are respectively connected with an electromagnetic valve c and an electromagnetic valve d; two ends of the compressor B are respectively connected with an electromagnetic valve a and an electromagnetic valve B; the power of compressor a and compressor B are of unequal magnitude. According to the invention, by utilizing the two compressors A and B with different powers, the control system is switched and started according to the temperature in the box, the low-power compressor is used for maintaining the temperature, the noise and the energy consumption are effectively reduced, the temperature in the box can be quickly reduced through the high-power compressor, the refrigeration effect is ensured, and the overall energy-saving and environment-friendly performance is effectively improved.
Description
Technical Field
The invention belongs to the technical field of refrigeration equipment, and particularly relates to a large and small compressor combined mixed working medium refrigeration system and a control method thereof.
Background
Old-fashioned refrigeration systems can currently cool the interior of the cabinet by up to-152 ℃, but also have certain drawbacks such as:
1. the system has high power and displacement requirements for the compressor, and typically a very high power and displacement compressor, such as SC18MLX, is required to bring the refrigeration system to the desired temperature.
2. At present, the power and the discharge capacity of the variable frequency compressor produced by each compressor manufacturer are generally lower, so that the variable frequency compressor cannot be selected by the old mixed working medium refrigerating system.
3. Because the system needs to use a high-power fixed-frequency compressor, the noise and power consumption of the product during refrigeration are higher, and the system is not beneficial to energy conservation and environmental protection.
Therefore, improvement of the existing mixed working medium refrigeration system is urgently needed to improve the efficiency of the refrigeration system and improve the overall energy-saving and environment-friendly performance.
Disclosure of Invention
The invention aims to provide a mixed working medium refrigerating system with a large compressor and a small compressor combined and a control method thereof.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a mixed working medium refrigerating system with a large compressor and a small compressor combined and a control method thereof, which comprises a refrigerating unit; the refrigerating unit comprises a compressor A and a compressor B which are connected in parallel; two ends of the compressor A are respectively connected with an electromagnetic valve c and an electromagnetic valve d; and two ends of the compressor B are respectively connected with an electromagnetic valve a and an electromagnetic valve B.
Further, the power of the compressor A and the compressor B are different in size.
A control method of a mixed working medium refrigerating system with a large compressor and a small compressor comprises the following steps:
the method comprises the following steps: setting a target temperature in the tank as T, a current temperature in the tank as T, a temperature upper return difference as X1, a temperature lower return difference as X2, a compressor starting temperature threshold as X3, a compressor A starting delay time as B1 and a compressor B starting delay time as B2; wherein X3 is greater than X1 and X2;
step two: detecting and acquiring a current temperature value t in the box, wherein the detection frequency is once per second;
step three: calculating the sum of the current temperature T in the box and a compressor starting temperature threshold value X3, and if T is more than T + X3, executing a fourth step; if not, executing the step six;
step four: closing the solenoid valve a and the solenoid valve B, switching on the solenoid valve c and the solenoid valve d, and starting the compressor A after waiting for the time B1;
step five; repeatedly executing the step three; if T is more than T + X3, the compressor A is continuously operated; if not, closing the compressor A and executing the step six;
step six: calculating the difference between the current temperature T in the box and the return difference X2 under the temperature, and if T is more than T-X2, executing a seventh step;
step seven: switching on the solenoid valve a and the solenoid valve B, closing the solenoid valve c and the solenoid valve d, and starting the compressor B after waiting for B2 time;
step eight: calculating the sum of the current temperature T in the tank and the return difference X1 in the temperature, and if T is less than T + X1, continuously operating the compressor B; if not, the compressor B is closed, and the step three is returned.
The invention has the following beneficial effects:
1. according to the invention, the two compressors A and B with different powers are used, and the compressor A or the compressor B can be switched to use according to the temperature in the refrigerator, so that the effect similar to that of a variable frequency compressor is realized.
2. Because the two fixed-frequency compressors are used, the invention is not limited by the difficulty in making large power of the existing variable-frequency compressor, and does not need to use a frequency converter, so that the comprehensive power consumption is more advantageous than that of the variable-frequency compressor.
3. According to the invention, the compressor A or the compressor B is switched to be used according to the condition of the temperature in the refrigerator, the low-power compressor is used for maintaining the temperature, the noise and the energy consumption are effectively reduced, the temperature in the refrigerator can be quickly reduced through the high-power compressor, and the refrigeration effect is ensured; thereby effectively improving the overall energy-saving and environment-friendly performance.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a mixed refrigerant refrigerating system with a combination of a large compressor and a small compressor according to the present invention;
FIG. 2 is a flow chart of a control method of a large and small compressor combined mixed working medium refrigerating system according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1 a-compressor A, 1B-compressor B, 2-condenser, 3-oil separator, 4-drying filter, 5-dephlegmator, 6-filter, 7-capillary tube a, 8-double-pipe heat exchanger, 9-solenoid valve e, 10-capillary tube B, 11-evaporator, 12-gas storage tank, 13-solenoid valve f, 14-capillary tube c, 15-pressure protector, 16-solenoid valve a, 17-solenoid valve B, 18-solenoid valve c, 19-solenoid valve d.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Referring to fig. 1, the present invention is a mixed working medium refrigeration system with a combination of a large compressor and a small compressor, including a refrigeration unit, a condenser 2, an oil separator 3, a dry filter 4, a dephlegmator 5, a filter 6, a capillary tube a7, a double pipe heat exchanger 8, a solenoid valve e9, a capillary tube b10, an evaporator 11, a gas storage tank 12, a solenoid valve f13, a capillary tube c14, a pressure protector 15, a solenoid valve a16, a solenoid valve b17, a solenoid valve c18, and a solenoid valve d 19;
the refrigerating unit comprises a compressor A1a and a compressor B1B which are connected in parallel; two ends of the compressor A1a are respectively connected with an electromagnetic valve c18 and an electromagnetic valve d 19; the two ends of the compressor B1B are respectively connected with a solenoid valve a16 and a solenoid valve B17, and the power of the compressor A1a is different from that of the compressor B1B.
As shown in fig. 2, a control method for a mixed working medium refrigerating system with a combination of a large compressor and a small compressor comprises the following steps:
the method comprises the following steps: setting a target temperature in the tank as T, a current temperature in the tank as T, a temperature upper return difference as X1, a temperature lower return difference as X2, a compressor starting temperature threshold as X3, a compressor A1a starting delay time as B1 and a compressor B1B starting delay time as B2; wherein X3 is greater than X1 and X2; the specific values of X1, X2, and X3 may be set differently according to the volume, power, and refrigeration system of the product.
Step two: detecting and acquiring a current temperature value t in the refrigeration equipment box, wherein the detection frequency is once per second, namely temperature data t is acquired once per second;
step three: calculating the sum of the current temperature T in the box and a compressor starting temperature threshold value X3, and if T is more than T + X3, executing a fourth step; if not, executing the step six;
step four: closing the electromagnetic valve a16 and the electromagnetic valve B17, and switching on the electromagnetic valve c18 and the electromagnetic valve d19, and starting the compressor A1a after waiting for B1 time;
step five; repeatedly executing the step three; if T > T + X3, the compressor A1a continues to operate; if not, closing the compressor A1a and executing the step six;
step six: calculating the difference between the current temperature T in the box and the return difference X2 under the temperature, and executing a seventh step when T is more than T-X2;
step seven: solenoid valve a16 and solenoid valve B17 are switched on, solenoid valve c18 and solenoid valve d19 are closed, and after waiting for B2 time, compressor B1B is started;
step eight: calculating the sum of the current temperature T in the tank and the return difference X1 in the temperature, and if T is less than T + X1, continuously operating the compressor B1B; if not, the compressor B1B is closed, the step three is returned, and the steps are executed in sequence in a circulating way.
Through using compressor A and compressor B that two power size are inequality to according to the condition of incasement temperature, switching control compressor A or compressor B open and stop, realize similar inverter compressor's effect, do not receive present inverter compressor power and be difficult to do big restriction, and need not use the converter, the inverter compressor is more advantageous than in the comprehensive consumption.
According to system control, the low-power compressor is used for maintaining the temperature, noise and energy consumption are effectively reduced, the temperature in the refrigerator can be quickly reduced through the high-power compressor, the refrigeration effect is guaranteed, and therefore the overall energy-saving and environment-friendly performance of the refrigeration equipment is effectively improved.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (2)
1. A control method for a mixed working medium refrigerating system combining a large compressor and a small compressor comprises a refrigerating unit, wherein the refrigerating unit comprises: a compressor A (1a) and a compressor B (1B) which are connected in parallel with each other, and a condenser, an oil separator, a drying filter, a dephlegmator, a filter, a capillary tube a, a double pipe heat exchanger, a solenoid valve e, a capillary tube B, an evaporator, a gas storage tank, a solenoid valve f, a capillary tube c, a pressure protector, a solenoid valve a (16), a solenoid valve B (17), a solenoid valve c (18) and a solenoid valve d (19);
two ends of the compressor A (1a) are respectively connected with an electromagnetic valve c (18) and an electromagnetic valve d (19); two ends of the compressor B (1B) are respectively connected with an electromagnetic valve a (16) and an electromagnetic valve B (17);
the method is characterized by comprising the following steps:
the method comprises the following steps: setting a target temperature in the tank as T, a current temperature in the tank as T, a temperature upper return difference as X1, a temperature lower return difference as X2, a compressor starting temperature threshold as X3, a starting delay time of a compressor A (1a) as B1 and a starting delay time of a compressor B (1B) as B2; wherein X3 is greater than X1 and X2; wherein the tank is a tank which is cooled by a refrigeration system;
step two: detecting and acquiring a current temperature value t in the box, wherein the detection frequency is once per second;
step three: calculating the sum of the current temperature T in the box and a compressor starting temperature threshold value X3, and if T is more than T + X3, executing a fourth step; if not, executing the step six;
step four: closing the electromagnetic valve a (16) and the electromagnetic valve B (17), and switching on the electromagnetic valve c (18) and the electromagnetic valve d (19), starting the compressor A (1a) after waiting for the time B1;
step five; repeatedly executing the step three; if T > T + X3, compressor A (1a) continues to run; if not, closing the compressor A (1a) and executing the step six;
step six: calculating the difference between the current temperature T in the box and the return difference X2 under the temperature, and if T is more than T-X2, executing a seventh step;
step seven: the electromagnetic valve a (16) and the electromagnetic valve B (17) are switched on, the electromagnetic valve c (18) and the electromagnetic valve d (19) are closed, and the compressor B (1B) is started after waiting for the time B2;
step eight: calculating the sum of the current temperature T in the tank and the return difference X1 in the temperature, and if T is less than T + X1, continuously operating the compressor B (1B); if not, the compressor B (1B) is closed, and the step three is returned to.
2. The control method of the refrigerant system with the mixed working medium of the large and small compressors as claimed in claim 1, wherein the power of the compressor A (1a) and the power of the compressor B (1B) are different.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010146476.1A CN111336706B (en) | 2020-03-05 | 2020-03-05 | Large and small compressor combined mixed working medium refrigerating system and control method thereof |
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| CN202010146476.1A CN111336706B (en) | 2020-03-05 | 2020-03-05 | Large and small compressor combined mixed working medium refrigerating system and control method thereof |
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| CN111336706B true CN111336706B (en) | 2021-09-14 |
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| CN113108510A (en) * | 2021-05-06 | 2021-07-13 | 无锡冠亚恒温制冷技术有限公司 | Double-threshold return difference control method for refrigeration electromagnetic valve |
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| CN203274341U (en) * | 2013-04-15 | 2013-11-06 | 广州威德玛环境仪器有限公司 | Multi-compressor parallel connection adjusting power energy-saving cold air bellow |
| CN104061707B (en) * | 2014-06-26 | 2017-07-18 | 浙江瑞能通信科技股份有限公司 | Intelligent multi-source refrigeration system and intelligent multi-source refrigeration control method |
| DE102015112439A1 (en) * | 2015-07-29 | 2017-02-02 | Bitzer Kühlmaschinenbau Gmbh | refrigeration plant |
| US20170241690A1 (en) * | 2016-02-19 | 2017-08-24 | Emerson Climate Technologies, Inc. | Compressor Capacity Modulation System For Multiple Compressors |
| JP6846685B2 (en) * | 2017-07-05 | 2021-03-24 | パナソニックＩｐマネジメント株式会社 | Air conditioner |
| CN110486966A (en) * | 2019-08-20 | 2019-11-22 | 珠海凌达压缩机有限公司 | A kind of air-conditioning system and its control method |
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Effective date of registration: 20220322 Address after: No.1862, Zishi Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: ZHONGKE MEILING CRYOGENICS Co.,Ltd. Patentee after: Anhui tuoxing Technology Co., Ltd Address before: No.1862, Zishi Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee before: ZHONGKE MEILING CRYOGENICS Co.,Ltd. |
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