CN108181124B - Air conditioning unit joint debugging tool system and control method thereof - Google Patents
Air conditioning unit joint debugging tool system and control method thereof Download PDFInfo
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- CN108181124B CN108181124B CN201810094111.1A CN201810094111A CN108181124B CN 108181124 B CN108181124 B CN 108181124B CN 201810094111 A CN201810094111 A CN 201810094111A CN 108181124 B CN108181124 B CN 108181124B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention relates to an air conditioning unit joint debugging tool system and a control method thereof, wherein the system comprises an indoor unit (21), an oil separator (2), a heat exchanger (3), a first liquid storage tank (4), a second liquid storage tank (8), a refrigerant pump (10) and a condenser (7), and the indoor unit (21), the oil separator (2), the heat exchanger (3) and the first liquid storage tank (4) are sequentially connected through pipelines to form an indoor circulation loop; the condenser (7), the second liquid storage tank (8) and the refrigerant pump (10) are sequentially connected through pipelines to form an outdoor circulation loop. According to the invention, the indoor and outdoor independent operation mode and the indoor and outdoor connection operation mode can be switched according to the outdoor environment temperature and the indoor heat load requirement, so that the lubricating oil return of the compressor is stable in the process of regulating and measuring the operation of the air conditioning unit, and the stability and reliability of the air conditioning unit after leaving the factory are improved.
Description
Technical Field
The invention relates to the field of air conditioning unit testing, in particular to an air conditioning unit joint debugging tool system and a control method thereof.
Background
At present, after the assembly of the indoor unit units is completed, part or all of the units can be extracted in a production joint debugging link, and the units are connected with an outdoor condenser and are operated and debugged, so that possible operation risks and assembly problems of the indoor air conditioner units can be identified. The joint debugging system adopted in the current air conditioner production line is shown in figure 1.
The application scheme of the joint debugging system shown in fig. 1 has the following problems: because the debugging position of the indoor unit 21 is located in the production line, for a large-scale air conditioning unit, the volume of the matched condenser 7 is larger, and because the interior space of a factory building and the heat dissipation environment are limited, the condenser 7 required by the joint debugging system is often placed on a roof, so that the connecting pipeline of the whole joint debugging system is longer. After the indoor unit 21 and the outdoor unit are connected through the quick connector, in the process of adjusting and measuring operation, the lubricating oil of the compressor in the indoor unit 21 is brought out by the refrigerant and then needs to pass through a longer pipeline to return to the compressor. Therefore, the oil return of the compressor is unstable in the joint debugging process, the compressor lubricating oil of the air conditioning unit after debugging is increased or decreased, and the stability and reliability of the air conditioning unit after leaving the factory are poor for the oil shortage unit.
Disclosure of Invention
The invention aims to solve the technical problem of providing an air conditioning unit joint debugging tool system aiming at the defects in the prior art.
The technical scheme adopted for solving the technical problems is as follows: constructing an air conditioning unit joint debugging tool system, which comprises an indoor unit 21, an oil separator 2, a heat exchanger 3, a first liquid storage tank 4, a second liquid storage tank 8, a refrigerant pump 10 and a condenser 7; the indoor unit 21, the oil separator 2, the heat exchanger 3 and the first liquid storage tank 4 are sequentially connected through pipelines to form an indoor circulation loop; the condenser 7, the second liquid storage tank 8, the refrigerant pump 10 and the heat exchanger 3 are sequentially connected through pipelines to form an outdoor circulation loop.
In the air conditioning unit joint debugging tool system, the refrigerant pump 10 provides power for the outdoor circulation loop, and under the action of the refrigerant pump 10, the refrigerant in the outdoor refrigeration circulation loop flows through the heat exchanger 3 to exchange heat with the refrigerant in the indoor circulation loop; the heat exchanger 3 comprises one of a plate heat exchanger, a shell and tube heat exchanger and an evaporative cooling heat exchanger.
In the air conditioning unit joint debugging tool system, the air conditioning unit joint debugging tool system further comprises a first control valve 9, a second control valve 13, a first pressure sensor 18, a second pressure sensor 19, a third pressure sensor 17 and a temperature sensor 16; the second liquid storage tank 8 is connected with the refrigerant pump 10 through the first control valve 9 and the first pressure sensor 18, the refrigerant pump 10 is connected with the heat exchanger 3 through the second pressure sensor 19, and the condenser 7 is connected with the heat exchanger 3 through the second control valve 13, the third pressure sensor 17 and the temperature sensor 16.
In the air conditioning unit joint adjustment tooling system, the air conditioning unit joint adjustment tooling system further comprises a first quick connector 22 and a second quick connector 23; the first liquid storage tank 4 is connected with an inlet pipe of the indoor unit through the first quick connector 22, and an outlet pipe of the indoor unit is connected with the oil separator 2 through the second quick connector 23.
In the air conditioning unit joint adjustment tooling system, the air conditioning unit joint adjustment tooling system further comprises a third control valve 11 and a fourth control valve 15, the first quick connector 22 is connected with the first liquid storage tank 4 through the third control valve 11, and the heat exchanger 3 is connected with the oil separator 2 through the fourth control valve 15.
In the air conditioning unit joint debugging tool system, the air conditioning unit joint debugging tool system further comprises a fifth control valve 12 and a sixth control valve 14, the second liquid storage tank 8 is connected with the first quick connector 22 through the fifth control valve 12, and the oil separator 2 is connected with the condenser 7 through the sixth control valve 14.
In the air conditioning unit joint debugging tool system of the present invention, the first control valve 9, the second control valve 13, the third control valve 11, the fourth control valve 15, the fifth control valve 12 and the sixth control valve 14 comprise one of electromagnetic valves and ball valves.
The invention also provides a control method of the air conditioning unit joint debugging tool system, which comprises the following steps:
step one, nominal refrigerating capacity Q and outdoor environment temperature T of an air conditioning unit are measured according to indoor regulation out Initially selecting mode 1; the mode 1 is an indoor and outdoor independent operation mode of the system when the first, second, third and fourth control valves 9, 13, 11, 15 are all opened and the fifth and sixth control valves 12, 14 are all closed;
step two, when Q is more than or equal to Q S And T is out ≥T s When the mode 2 is started; q (Q) S For presetting the nominal refrigerating capacity of the indoor air conditioning unit, ts is the indoor environment temperature, and mode 2 is the indoor and outdoor connection operation mode of the system when the first control valve, the second control valve 13, the third control valve 11 and the fourth control valve 15 are all closed, and the fifth control valve 12 and the sixth control valve 14 are all opened.
The control method of the air conditioning unit joint debugging tool system further comprises the following steps:
step three, in the mode 1, the refrigerant pump runs for a period of time t1 at the rotating speed of 100% after being started;
step four, calculating the superheat degree T1 of the outdoor side of the heat exchanger 3 according to the test values of the temperature sensor 16 and the third pressure sensor 17, and setting the target superheat degree as T2;
fifthly, when T1 is more than T2, detecting the rotating speed of the current refrigerant pump, and if the rotating speed is less than 100%, increasing the rotating speed; if the rotating speed is equal to 100%, switching the system to enter the mode 2; when t1=t2, then maintaining the mode 1 operation; when T1 < T2, the rotational speed is reduced.
The air conditioning unit joint debugging tool system and the control method thereof have the following beneficial effects: according to the invention, the indoor and outdoor independent regulation and measurement operation modes and the indoor and outdoor connection regulation and measurement operation modes can be switched according to the outdoor environment temperature and the indoor heat load requirement; in addition, the length of the oil return pipeline of the air conditioning unit joint debugging tool system is shortened by optimizing the indoor and outdoor circulation loops, so that the lubricating oil return of the compressor is stable in the debugging operation process of the air conditioning unit, and the stability and reliability of the air conditioning unit after leaving the factory are improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic block diagram of a prior art air conditioning unit joint debugging system;
FIG. 2 is a schematic block diagram of a first embodiment of an air conditioning unit joint debugging tooling system of the present invention;
FIG. 3 is a schematic block diagram of a second embodiment of an air conditioning unit joint debugging tooling system of the present invention;
fig. 4 is a logic flow diagram of a control method of the air conditioning unit joint debugging tooling system in fig. 2.
Detailed Description
As shown in fig. 2, in a schematic block diagram of a first embodiment of an air conditioning unit joint debugging tool system according to the present invention, the air conditioning unit joint debugging tool system includes an indoor unit 21, an oil separator 2, a heat exchanger 3, a first liquid storage tank 4, a second liquid storage tank 8, a refrigerant pump 10, and a condenser 7, and it is understood that the indoor unit 21 includes a throttle valve 5, an evaporator 6, and a compressor 1.
It can be understood that the indoor unit 21, the oil separator 2, the heat exchanger 3 and the first liquid storage tank 4 are sequentially connected through pipelines to form an indoor circulation loop; the condenser 7, the second liquid storage tank 8 and the refrigerant pump 10 are sequentially connected through pipelines to form an outdoor circulation loop. The indoor and outdoor circulation loops exchange heat through the heat exchanger 3, namely the refrigerant pump 10 provides power for the outdoor circulation loop, and under the action of the refrigerant pump 10, the refrigerant in the outdoor refrigeration circulation loop flows through the heat exchanger 3 to exchange heat with the refrigerant in the indoor circulation loop.
It will be appreciated that the heat exchanger 3 comprises one of a plate heat exchanger, a shell and tube heat exchanger, an evaporative cooling heat exchanger.
It can be understood that the air conditioning unit joint adjustment tooling system further comprises a first control valve 9, a second control valve 13, a third control valve 11, a fourth control valve 15, a fifth control valve 12, a sixth control valve 14, a first quick connector 22, a second quick connector 23, a first pressure sensor 18, a second pressure sensor 19, a third pressure sensor 17 and a temperature sensor 16; the second liquid storage tank 8 is connected with the refrigerant pump 10 through the first control valve 9 and the first pressure sensor 18, the refrigerant pump 10 is connected with the heat exchanger 3 through the second pressure sensor 19, and the condenser 7 is connected with the heat exchanger 3 through the second control valve 13, the third pressure sensor 17 and the temperature sensor 16; the throttle valve 5 is connected with the first liquid storage tank 4 through a first quick connector 22, and the compressor 1 is connected with the oil separator 2 through a second quick connector 23; the first quick connector 22 is connected with the first liquid storage tank 4 through the third control valve 11, and the heat exchanger 3 is connected with the oil separator 2 through the fourth control valve 15; the second liquid storage tank 8 is connected with the first quick connector 22 through the fifth control valve 12, and the oil separator 2 is connected with the condenser 7 through the sixth control valve 14.
It is understood that the refrigerant in the indoor and outdoor circulation circuits in the present invention may be R22/R410A/R134A/R407C or the like.
It will be appreciated that in the schematic block diagram of the first embodiment of the air conditioning unit joint debugging tool system shown in fig. 2, the joint debugging tool 20 is connected to the condenser 7 through a copper pipe.
It will be appreciated that the first control valve 9, the second control valve 13, the third control valve 11, the fourth control valve 15, the fifth control valve 12 and the sixth control valve 14 comprise one of solenoid valves, ball valves.
In the schematic block diagram of the first embodiment of the air conditioning unit joint debugging tool system of the present invention shown in fig. 2, the first control valve 9, the second control valve 13, the third control valve 11, the fourth control valve 15, the fifth control valve 12 and the sixth control valve 14 are electromagnetic valves. When the first control valve 9, the second control valve 13, the third control valve 11 and the fourth control valve 15 are all opened and the fifth control valve 12 and the sixth control valve 14 are all closed, the air conditioning unit joint adjustment tooling system is in an indoor and outdoor independent operation mode, and the indoor circulation loop transmits indoor heat to the outdoor circulation loop through the heat exchanger 3. After being discharged through the compressor 1, the refrigerant in the indoor circulation loop passes through the oil separator 2 and then enters the heat exchanger 3 to transfer heat to the refrigerant outside the room, the cooled refrigerant enters the first liquid storage tank 4, passes through the throttle valve 5 and then enters the evaporator 6 to absorb heat, and finally enters the compressor 1 to complete indoor circulation. For the outdoor circulation loop, the refrigerant in the outdoor circulation loop absorbs the heat of the refrigerant at the inner side of the room through the heat exchanger 3 to become high-temperature gas, then enters the condenser 7 to dissipate heat, and the cooled refrigerant enters the second liquid storage tank 8 and then enters the heat exchanger 3 through the refrigerant pump 10 to complete the whole outdoor circulation.
It will be appreciated that when the first control valve 9, the second control valve 13, the third control valve 11, and the fourth control valve 15 are all closed, and the fifth control valve 12 and the sixth control valve 14 are all opened, the air conditioning unit joint adjustment tool system is in the indoor and outdoor connection operation mode, as shown in the schematic block diagram of the second embodiment of the air conditioning unit joint adjustment tool system in fig. 3, at this time, the refrigerant passes through the compressor 1, the oil separator 2, is cooled by the condenser 7, enters the second liquid storage tank 8, is changed into a low-temperature and low-pressure state by the throttle valve 5, absorbs heat by the evaporator 6, and finally enters the compressor 1 to complete circulation. At this time, the whole circulation system is consistent with the circulation path of the original joint debugging system.
It can be appreciated that the two modes of operation can be controlled and switched according to the outdoor ambient temperature and the indoor circulation loop thermal load demand: when the outdoor environment temperature is lower, the air conditioning unit joint debugging tool system operates according to an indoor and outdoor independent operation mode, the refrigerant of the outdoor circulation loop can fully dissipate heat through the condenser 7, then the heat in the indoor circulation loop is absorbed through the heat exchanger 3, the rotating speed of the refrigerant pump 10 is regulated through the superheat degree of the outlet of the heat exchanger 3, and the flow of the outdoor system is determined; when the outdoor environment temperature is higher, the condenser 7 is switched to an indoor and outdoor connection operation mode when the heat exchange is insufficient.
As shown in fig. 4, the control method of the air conditioning unit joint debugging tool system of the invention comprises the following steps: step one, according to the nominal refrigerating capacity Q of the indoor regulating and measuring unit and the outdoor environment temperature T out Initially selecting mode 1; mode 1 is an indoor and outdoor independent operation mode.
Step two, when Q is more than or equal to Q S And T is out ≥T s When the mode 2 is started; q (Q) S For presetting the nominal refrigerating capacity of the indoor air conditioning unit, T s For presetting outdoor environment temperature, mode 2 is indoor and outdoor connection operation mode.
It will be appreciated that Q S T is as follows s Can be set according to the condenser 7 actually provided.
In order to save more energy and improve the stability of the air conditioning unit joint debugging tool system, the method further comprises the following steps:
in mode 1, the refrigerant pump 10 is operated at 100% rotational speed for a period of time t1 after start-up.
And step four, calculating the superheat degree T1 of the outdoor side of the heat exchanger 3 according to the test values of the temperature sensor 16 and the third pressure sensor 17, and setting the target superheat degree as T2.
Step five, when T1 is more than T2, detecting the rotation speed of the current refrigerant pump 10, and if the current rotation speed is less than 100%, increasing the rotation speed; if the current rotating speed is equal to 100%, switching to enter a mode 2;
when t1=t2, then the current mode 1 operation is maintained;
when T1 < T2, the rotational speed of the refrigerant pump 10 is reduced.
According to the invention, the indoor and outdoor independent operation mode and the indoor and outdoor connection operation mode can be switched according to the outdoor environment temperature and the indoor heat load requirement, so that the lubricating oil return of the compressor in the indoor unit is stable in the process of regulating and measuring operation of the air conditioning unit, and the stability and reliability of the air conditioning unit after leaving the factory are improved.
It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (5)
1. The combined adjustment tooling system of the air conditioning unit is characterized by comprising an indoor unit (21), an oil separator (2), a heat exchanger (3), a first liquid storage tank (4), a second liquid storage tank (8), a refrigerant pump (10) and a condenser (7); the indoor unit (21), the oil separator (2), the heat exchanger (3) and the first liquid storage tank (4) are sequentially connected through pipelines to form an indoor circulation loop; the condenser (7), the second liquid storage tank (8), the refrigerant pump (10) and the heat exchanger (3) are sequentially connected through pipelines to form an outdoor circulation loop;
the refrigerant pump (10) provides power for the outdoor circulation loop, and under the action of the refrigerant pump (10), the refrigerant in the outdoor circulation loop flows through the heat exchanger (3) to exchange heat with the refrigerant in the indoor circulation loop;
the device also comprises a first control valve (9), a second control valve (13), a first pressure sensor (18), a second pressure sensor (19), a third pressure sensor (17) and a temperature sensor (16); the second liquid storage tank (8) is connected with the refrigerant pump (10) through the first control valve (9) and the first pressure sensor (18), the refrigerant pump (10) is connected with the heat exchanger (3) through the second pressure sensor (19), and the condenser (7) is connected with the heat exchanger (3) through the second control valve (13), the third pressure sensor (17) and the temperature sensor (16);
the device also comprises a first quick connector (22) and a second quick connector (23); the first liquid storage tank (4) is connected with an inlet pipe of the indoor unit through the first quick connector (22), and an outlet pipe of the indoor unit is connected with the oil separator (2) through the second quick connector (23);
the system further comprises a third control valve (11) and a fourth control valve (15), wherein the first quick connector (22) is connected with the first liquid storage tank (4) through the third control valve (11), and the heat exchanger (3) is connected with the oil separator (2) through the fourth control valve (15);
the system further comprises a fifth control valve (12) and a sixth control valve (14), wherein the second liquid storage tank (8) is connected with the first quick connector (22) through the fifth control valve (12), and the oil separator (2) is connected with the condenser (7) through the sixth control valve (14).
2. The air conditioning unit joint debugging tool system according to claim 1, wherein the heat exchanger (3) comprises one of a plate heat exchanger, a shell and tube heat exchanger and an evaporative cooling heat exchanger.
3. The air conditioning unit joint debugging tool system according to claim 1, wherein the first control valve (9), the second control valve (13), the third control valve (11), the fourth control valve (15), the fifth control valve (12) and the sixth control valve (14) comprise one of electromagnetic valves and ball valves.
4. A control method of the air conditioning unit joint debugging tool system as set forth in claim 3, comprising the steps of:
step one, nominal refrigerating capacity Q and outdoor environment temperature T of an air conditioning unit are measured according to indoor regulation out Initially selecting a mode I; the first mode is an indoor and outdoor independent operation mode of the system when the first control valve (9), the second control valve (13), the third control valve (11) and the fourth control valve (15) are all opened, and the fifth control valve (12) and the sixth control valve (14) are all closed;
step two, when Q is more than or equal to Q S And T is out ≥T s When the second mode is started; q (Q) S For presetting the nominal refrigerating capacity of the indoor air conditioning unit, T s For presetting outdoor environment temperature, mode two is when first control valve (9), second control valve (13), third control valve (11), fourth control valve (15) all close, and fifth control valve (12) and sixth control valve (14) are all open indoor outer connection running mode of system.
5. The method for controlling a joint debugging tool system of an air conditioning unit according to claim 4, further comprising the steps of,
step three, in the mode one, the refrigerant pump (10) is operated for a period of time t1 at a rotating speed of 100% after being started;
step four, calculating the superheat degree T1 of the outdoor side of the heat exchanger (3) according to the test values of the temperature sensor (16) and the third pressure sensor (17), and setting the target superheat degree as T2;
step five, when T1 is more than T2, detecting the rotating speed of the current refrigerant pump (10), and if the rotating speed is less than 100%, increasing the rotating speed; if the rotating speed is equal to 100%, switching the system to enter the second mode; when t1=t2, then maintaining the mode one operation; when T1 < T2, the rotational speed is reduced.
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