CN107314499A - A kind of air-conditioning heating low tension switch protects control method - Google Patents
A kind of air-conditioning heating low tension switch protects control method Download PDFInfo
- Publication number
- CN107314499A CN107314499A CN201710388593.7A CN201710388593A CN107314499A CN 107314499 A CN107314499 A CN 107314499A CN 201710388593 A CN201710388593 A CN 201710388593A CN 107314499 A CN107314499 A CN 107314499A
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- Prior art keywords
- air
- tension switch
- low tension
- conditioning
- temperature
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Classifications
-
- 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
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
-
- 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
- F25B2700/2117—Temperatures of an evaporator
Landscapes
- Air Conditioning Control Device (AREA)
Abstract
Control method is protected the present invention relates to a kind of air-conditioning heating low tension switch; under air-conditioning heating pattern; by the outlet temperature for detecting outdoor heat exchanger; and for different outlet temperatures; using different low-voltage variation control methods; this method can accurately and timely judge the action of low tension switch, and make do not fail to report, do not report by mistake and the report that is not delayed low tension switch protection, so as to extend the service life of air-conditioning.
Description
Technical field
The present invention relates to field of air conditioning, and in particular to a kind of air-conditioning heating low tension switch protects control method.
Background technology
Air-conditioning is in heating process, and by outdoor heat exchanger and outdoor air heat exchange occurs for refrigerant, from outdoor
Air absorbs heat and evaporated, and the refrigerant compression of low-temp low-pressure into the refrigerant vapour of HTHP, is entered to enter the room by compressor
Inside heat exchanger heat release, releases heat come heating indoor air by indoor heat converter, people is enjoyed pleasant ring
Border.But, air-conditioning is under low-temperature heating pattern, and low pressure is relatively low, and low-voltage variation failure, therefore, prior art easily occurs in air-conditioning
In disclose the control method that low tension switch in a heating mode disconnects protection, i.e. heating mode compressor start or defrosting after make
After thermocompressor starts, in compressor operating 5~10 minutes, shielding low-voltage protection is that low tension switch does not work, this method
Although can effectively control low tension switch to disconnect realizing low-voltage variation in a heating mode, there is following defect：Low
When temperature is heated, the non-leakage of unit lacks fluorine, and low tension switch disconnects, report low tension switch protection, i.e., the problem of easily reporting by mistake；Work as height
When temperature is heated, unit leakage lacks fluorine, needs during compressor operating 5~10 minutes that just report low tension switch disconnects protection, low tension switch
Protection is not in time.
After heating compressor start after heating mode compressor start or defrosting in the prior art, also using by defrosting
The temperature value of temperature sensor disconnects the judgement of protection as low tension switch, i.e., when the sensor temperature that defrosts is higher than some value,
Compressor start was run in 5~10 minutes, and low tension switch disconnects, and reported low-voltage variation；It is less than some value in defrosting sensor temperature
When, direct shielding low-voltage switch protection, although this method also can effectively protect compressor in a heating mode, there is also
Following defect：During low-temperature heating, when the temperature of defrosting temperature sensor is less than a certain value, unit leakage lacks fluorine, low tension switch
Disconnect, but do not report low-voltage variation, i.e., the problem of easily failing to report；When high temperature is heated, unit leakage lacks fluorine, but needs compression
When machine is run 5 to 10 minutes, low tension switch is just reported to disconnect protection, i.e. low tension switch protection not in time, accordingly, it would be desirable to air-conditioning system
Low tension switch protection control method is controlled further to improve under heat pattern.
The content of the invention
The technical problems to be solved by the invention are in a heating mode can be accurate there is provided a kind of air-conditioning for prior art
Really judge the action of low tension switch in time, make and do not fail to report, do not report by mistake and the low tension switch for the report that is not delayed protects control method.
The present invention solve the technical scheme that is used of above-mentioned technical problem for：A kind of air-conditioning heating low tension switch protection control
Method, the air-conditioning includes opening provided with low pressure at indoor heat exchanger, outdoor heat exchanger and compressor, the air entry of the compressor
Close, it is characterised in that：The control method comprises the following steps：
S1：The air-conditioning enters heating mode, compressor operating, and the compressor operating time, which is less than or equal to first, to be preset
Time t1, shielding low-voltage switch protection；
S2：Compressor is continued to run with, while detecting the outlet temperature T of outdoor heat exchanger1, and by the outlet of outdoor heat exchanger
Temperature T1With the first preset temperature Ts1It is compared, if T1>Ts1When, perform step S3；If T1≤Ts1When, perform step S5；
S3：Whether detection low tension switch disconnects, and performs next step；
S4：If low tension switch disconnects, low tension switch failure is reported, air-conditioner set locking, air-conditioning is shut down；Otherwise, air-conditioning is normal
Operation；
S5：Detect exhaust outlet of compressor temperature T3, the temperature T of indoor heat exchanger inner disc2And indoor environment temperature T4, and
By the exhaust outlet of compressor temperature T detected3With the temperature T of indoor heat exchanger inner disc2Difference DELTA T=T3-T2It is default with second
Temperature Ts2It is compared, and whether the detection duration reaches the second preset time t2；Indoor environment temperature T will be detected4With
The temperature T of indoor heat exchanger inner disc2It is compared, while judging whether low tension switch disconnects, and performs next step；
S6：If Δ T>Ts2, and the duration is more than or equal to t2；T2>T4And low tension switch disconnects, then low tension switch protection is reported,
Now air-conditioner set is locked, and does not allow air-conditioning to start shooting；Otherwise, when low tension switch is closed, air-conditioning is normally run.
Preferably, in step s 4, air-conditioner set is locked, and after air-conditioning is shut down, air-conditioning is started shooting, while detection the 3rd is preset
Time t3Inside whether there are three air-conditioner set lockings, if occurring, do not allow starting of air conditioner to run, otherwise, return performs step
Rapid S4.
Preferably, the first preset temperature Ts1For -12 DEG C, the first preset time t1Span is in 3min~4min.
Preferably, the second preset temperature Ts2Span in 40 DEG C~50 DEG C, the second preset time t2Span
In 40s~50s.
Further preferably, the 3rd preset time t3Span in 50min~70min.
Further preferably, the first preset time t1For 4 minutes.
Further preferably, the second preset temperature Ts2For 45 DEG C, the second preset time t2For 45s.
Further preferably, the 3rd preset time t3For 60min.
Compared with prior art, the advantage of the invention is that：Under air-conditioning heating pattern, by detecting outdoor heat exchanger
Outlet temperature, and for the difference of outlet temperature, using different low-voltage variation control methods, can accurately and timely judge low
The action compressed switch, and the protection for the low tension switch do not failed to report accurately and timely, and do not reported by mistake is made, so as to extend the use of air-conditioning
Life-span.
Brief description of the drawings
Fig. 1 is the air-conditioning system figure of the embodiment of the present invention；
Fig. 2 is the control flow chart that heating mode low tension switch of the present invention is protected.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing embodiment.
It is the preferred embodiments of the present invention as shown in Figure 1 to Figure 2, is the system diagram of the present embodiment air-conditioning as shown in Figure 1, should
Air-conditioning includes outdoor heat exchanger 2, indoor heat exchanger 1, four-way valve 3, compressor 4, electric expansion valve 5 and filter 6, wherein,
Low tension switch 41 is provided with the air entry of compressor 4, the exhaust ports of compressor 4 are provided with exhaust gas temperature sensor 42, and interior is changed
Environment temperature sensor 12 and inner disc temperature sensor 11 are provided with hot device 1, inner disc temperature sensor 11, which is disposed in the interior, to be changed
On the inner disc of hot device, the bottom of outdoor heat exchanger is provided with defrosting temperature sensor 21, the outlet for detecting outdoor heat exchanger 2
The temperature at place.
Fig. 2 show the control flow chart of air-conditioning heating low tension switch protection, and the control method comprises the following steps：
S1：The air-conditioning enters heating mode, compressor operating, and the compressor operating time, which is less than or equal to first, to be preset
Time t1, shielding low-voltage switch protection；Wherein, the first preset time t1Span is preferred in 3min~4min, the present embodiment
t1=4min；
S2：Compressor is continued to run with, while detecting the outlet temperature T of outdoor heat exchanger1, and by the outlet of outdoor heat exchanger
Temperature T1With the first preset temperature Ts1It is compared, if T1>Ts1When, perform step S3；If T1≤Ts1When, perform step S5；Its
In, the first preset temperature Ts1For -12 DEG C；
S3：Whether detection low tension switch disconnects, and performs next step；
S4：If low tension switch disconnects, low tension switch failure is reported, air-conditioner set locking, air-conditioning is shut down；, will after air-conditioning is shut down
Air-conditioning is started shooting operation again, while detecting the 3rd preset time t3Inside whether there are three air-conditioner set lockings, if occurring, no
Starting of air conditioner is allowed to run；Wherein, the 3rd preset time t3Span is in 50min~70min, the present embodiment, preferably t3=
60min, i.e., occur 3 locking air-conditioner sets in 60min, do not allow for starting of air conditioner operation；It is empty if low tension switch is closed
Levelling often operation；
S5：Detect exhaust outlet of compressor temperature T3, the temperature T of indoor heat exchanger inner disc2And indoor environment temperature T4, and
By the exhaust outlet of compressor temperature T detected3With the temperature T of indoor heat exchanger inner disc2Difference DELTA T=T3-T2It is default with second
Temperature Ts2It is compared, and whether the detection duration reaches the second preset time t2；Indoor environment temperature T will be detected4With
The temperature T of indoor heat exchanger inner disc2It is compared, while judging whether low tension switch disconnects, and performs next step；Wherein,
Two preset temperature Ts2Span in 40 DEG C~50 DEG C, the second preset time t2Span in 40s~50s, this implementation
In example, preferably Ts2=45 DEG C, t2=45s；
S6：If Δ T>Ts2, and the duration is more than or equal to t2；T2>T4And low tension switch 41 disconnects, then low tension switch is reported to protect
Shield, now air-conditioner set locking, does not allow air-conditioning to start shooting；Otherwise, when low tension switch 41 is closed, air-conditioning is normally run；Wherein,
Two preset time ts2Span in 40s~50s, the present embodiment, preferably t2=45s.
Specifically, when carrying out heating mode when air-conditioning carries out heating mode or after air-conditioner defrosting, compressor start, pressure
When contracting machine 4 continued to run with the time less than or equal to 4 minutes, then shielding low-voltage switch protection, i.e. low tension switch 41 do not work；Compression
Machine is continued to run with, and the temperature T that outdoor heat exchanger is exported is detected by the temperature sensor 21 that defrosts1, and going out outdoor heat exchanger
Mouth temperature T1With the first preset temperature Ts1=-12 DEG C are compared；
When detecting T1>At -12 DEG C, whether detection low tension switch 41 disconnects, if low tension switch 41 is closed, air-conditioning is just
Often operation；If detecting report low tension switch 41 to disconnect, low tension switch failure is reported, air-conditioning is shut down, and air-conditioning is started shooting again,
Continue to run with, while whether detection occurred 3 low tension switches 41 in 60 minutes and disconnects, air-conditioner set lock condition, if gone out
It is existing, then judge that air-conditioner set leakage lacks fluorine, then do not allow starting of air conditioner to start shooting；If occurring without 3 unit lockings, low pressure is reported
Switch fault；Using this control method, it is only necessary to fluorine can be lacked to the leakage of the unit of air-conditioning within 4 minutes and make reflection, well
The problem of solving low tension switch protection not in time, can better meet the demand of user.
As the warm T for detecting outdoor heat exchanger outlet1At≤- 12 DEG C, exhaust outlet of compressor temperature T is detected3, indoor heat exchange
The temperature T of device inner disc2And indoor environment temperature T4, and by the exhaust outlet of compressor temperature T detected3In indoor heat exchanger
The temperature T of disk2Difference DELTA T=T3-T2With the second preset temperature Ts2It is compared, and indoor environment temperature T will be detected4With
The temperature T of indoor heat exchanger inner disc2It is compared, and judges whether low tension switch disconnects, when detects Δ T>45 DEG C, and continue
Time 45s；T2>T4And low tension switch disconnects, three conditions are met simultaneously when, then low tension switch protection is reported, air-conditioner set is locked just
Starting of air conditioner is not allowed to run；Otherwise, when low tension switch is closed, air-conditioning is normally run, using the control method, in low-temperature heating
Under pattern, if the non-leakage of air-conditioner set lacks fluorine, Δ T value is smaller, is unsatisfactory for reporting the condition of low tension switch protection, will not
Report low-voltage variation, the problem of solving wrong report；When leakage is more than 30%~40%, Δ T value can report low pressure to protect than larger
Shield, solves and uses defrosting temperature sensor temperature value low, and unit leakage lacks fluorine, and report low tension switch disconnects, but does not report guarantor
The problem of shield, i.e., the action of low tension switch, and the accurately and timely protection of report low tension switch, solution can be judged exactly using this method
Determined fail to report, report by mistake and not as good as Times the problem of, the service life of air-conditioning is extended, the need for better meeting user.
Claims (8)
1. a kind of air-conditioning heating low tension switch protects control method, the air-conditioning includes indoor heat exchanger, outdoor heat exchanger and pressure
Low tension switch is provided with contracting machine, the air entry of the compressor, it is characterised in that：The control method comprises the following steps：
S1：The air-conditioning enters heating mode, and compressor operating, the compressor operating time is less than or equal to the first preset time
t1, shielding low-voltage switch protection；
S2：Compressor is continued to run with, while detecting the outlet temperature T of outdoor heat exchanger1, and by the outlet temperature of outdoor heat exchanger
T1With the first preset temperature Ts1It is compared, if T1>Ts1When, perform step S3；If T1≤Ts1When, perform step S5；
S3：Whether detection low tension switch disconnects, and performs next step；
S4：If low tension switch disconnects, low tension switch failure is reported, air-conditioner set locking, air-conditioning is shut down；Otherwise, air-conditioning is normally run；
S5：Detect exhaust outlet of compressor temperature T3, the temperature T of indoor heat exchanger inner disc2And indoor environment temperature T4, and will inspection
The exhaust outlet of compressor temperature T measured3With the temperature T of indoor heat exchanger inner disc2Difference DELTA T=T3-T2With the second preset temperature
Ts2It is compared, and whether the detection duration reaches the second preset time t2；Indoor environment temperature T will be detected4With interior
The temperature T of heat exchanger inner disc2It is compared, while judging whether low tension switch disconnects, and performs next step；
S6：If Δ T>Ts2, and the duration is more than or equal to t2；T2>T4And low tension switch disconnects, then low tension switch protection is reported, now
Air-conditioner set is locked, and does not allow air-conditioning to start shooting；Otherwise, when low tension switch is closed, air-conditioning is normally run.
2. air-conditioning heating low tension switch according to claim 1 protects control method, it is characterised in that：In step s 4,
Air-conditioner set is locked, and after air-conditioning is shut down, air-conditioning is started shooting, while detecting the 3rd preset time t3Inside whether there are No. three air conditioners
Group locking, if occurring, does not allow starting of air conditioner to run, otherwise, returns and performs step S4.
3. air-conditioning heating low tension switch according to claim 1 protects control method, it is characterised in that：First preset temperature
Ts1For -12 DEG C, the first preset time t1Span is in 3min~4min.
4. air-conditioning heating low tension switch according to claim 1 protects control method, it is characterised in that：Second preset temperature
Ts2Span in 40 DEG C~50 DEG C, the second preset time t2Span in 40s~50s.
5. air-conditioning heating low tension switch according to claim 2 protects control method, it is characterised in that：3rd preset time
t3Span in 50min~70min.
6. air-conditioning heating low tension switch according to claim 3 protects control method, it is characterised in that：First preset time
t1For 4min.
7. air-conditioning heating low tension switch according to claim 4 protects control method, it is characterised in that：Second preset temperature
Ts2For 45 DEG C, the second preset time t2For 45s.
8. air-conditioning heating low tension switch according to claim 5 protects control method, it is characterised in that：3rd preset time
t3For 60min.
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| CN201710388593.7A CN107314499B (en) | 2017-05-27 | 2017-05-27 | A kind of air-conditioning heating low tension switch protection control method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084421A (en) * | 2018-08-03 | 2018-12-25 | 广东美的暖通设备有限公司 | Control method, control device and the air conditioner of air conditioner |
| CN109357356A (en) * | 2018-09-11 | 2019-02-19 | 珠海格力电器股份有限公司 | Fault processing method and device and household appliance |
| CN109455057A (en) * | 2018-10-22 | 2019-03-12 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN109612022A (en) * | 2018-11-28 | 2019-04-12 | 宁波奥克斯电气股份有限公司 | A kind of control method for preventing air-conditioning from blocking up valve operation |
| CN110006132A (en) * | 2019-04-16 | 2019-07-12 | 珠海格力电器股份有限公司 | Unit fault processing method, device and unit |
| CN110562006A (en) * | 2019-08-30 | 2019-12-13 | 广东志高暖通设备股份有限公司 | Low-voltage protection method and device, computer equipment and storage medium |
| CN111121227A (en) * | 2019-12-30 | 2020-05-08 | 宁波奥克斯电气股份有限公司 | Fault detection method and device under low-voltage pressure switch protection mode and air conditioner |
| CN111623472A (en) * | 2020-05-09 | 2020-09-04 | 青岛海尔空调电子有限公司 | Air conditioner and method for preventing low-voltage fault thereof |
| CN113551378A (en) * | 2020-04-26 | 2021-10-26 | 青岛海尔空调电子有限公司 | Control method, system and device for preventing low-voltage fault during low-temperature heating starting of air conditioner |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109084421A (en) * | 2018-08-03 | 2018-12-25 | 广东美的暖通设备有限公司 | Control method, control device and the air conditioner of air conditioner |
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| CN109357356A (en) * | 2018-09-11 | 2019-02-19 | 珠海格力电器股份有限公司 | Fault processing method and device and household appliance |
| CN109455057B (en) * | 2018-10-22 | 2020-04-28 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN109455057A (en) * | 2018-10-22 | 2019-03-12 | 珠海格力电器股份有限公司 | Air conditioner control method and device, storage medium and air conditioner |
| CN109612022A (en) * | 2018-11-28 | 2019-04-12 | 宁波奥克斯电气股份有限公司 | A kind of control method for preventing air-conditioning from blocking up valve operation |
| CN110006132B (en) * | 2019-04-16 | 2020-01-07 | 珠海格力电器股份有限公司 | Unit fault processing method, device and unit |
| CN110006132A (en) * | 2019-04-16 | 2019-07-12 | 珠海格力电器股份有限公司 | Unit fault processing method, device and unit |
| CN110562006A (en) * | 2019-08-30 | 2019-12-13 | 广东志高暖通设备股份有限公司 | Low-voltage protection method and device, computer equipment and storage medium |
| CN111121227A (en) * | 2019-12-30 | 2020-05-08 | 宁波奥克斯电气股份有限公司 | Fault detection method and device under low-voltage pressure switch protection mode and air conditioner |
| CN111121227B (en) * | 2019-12-30 | 2022-03-18 | 宁波奥克斯电气股份有限公司 | Fault detection method and device under low-voltage pressure switch protection mode and air conditioner |
| CN113551378A (en) * | 2020-04-26 | 2021-10-26 | 青岛海尔空调电子有限公司 | Control method, system and device for preventing low-voltage fault during low-temperature heating starting of air conditioner |
| CN111623472A (en) * | 2020-05-09 | 2020-09-04 | 青岛海尔空调电子有限公司 | Air conditioner and method for preventing low-voltage fault thereof |
| CN111623472B (en) * | 2020-05-09 | 2023-12-26 | 青岛海尔空调电子有限公司 | Air conditioner and method for preventing low-voltage faults thereof |
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