CN114046591A - Control method for household water machine - Google Patents
Control method for household water machine Download PDFInfo
- Publication number
- CN114046591A CN114046591A CN202111453493.0A CN202111453493A CN114046591A CN 114046591 A CN114046591 A CN 114046591A CN 202111453493 A CN202111453493 A CN 202111453493A CN 114046591 A CN114046591 A CN 114046591A
- Authority
- CN
- China
- Prior art keywords
- temperature
- water
- heat exchanger
- side heat
- condition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007710 freezing Methods 0.000 claims abstract description 20
- 239000003507 refrigerant Substances 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims description 13
- 230000002528 anti-freeze Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 238000005057 refrigeration Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention relates To a control method of a household water machine, which comprises the steps of detecting the refrigerant pressure Pc of an air side heat exchanger, the refrigerant pressure Pd of a water side heat exchanger, the water inlet temperature Ti and the water outlet temperature To of the water side heat exchanger, the coil temperature Tp of the air side heat exchanger, the anti-freezing temperature Tf of the water side heat exchanger and the ambient temperature Th; and when the following two conditions are simultaneously met and the time lasts for 1 minute, judging that the four-way valve is abnormal in reversing: condition a: Tc-Th > T1; condition B: Td-Ti < T2; condition C: Tp-Th > T3; condition D: To-Ti < T4; condition E: to < T5, or Tf < T5; then, an alarm is sent out or the machine is stopped, so that the damage of the machine set is avoided.
Description
Technical Field
The invention relates to a control method of an air conditioner, in particular to a control method of a central air conditioner, and specifically relates to a control method of a household water machine.
Background
The household water machine is one of central air conditioners, and more families use the household water machine as ground heating for heat supply. The household water machine runs a refrigeration mode in summer and runs a heating mode in winter to provide heat, and the conversion between the refrigeration mode and the heating mode is realized through a four-way reversing valve. When the heating mode is operated, the unit firstly operates the cooling mode for a period of time and then is switched to the heating mode. If the four-way reversing valve fails to turn, the unit cannot be normally switched to the heating mode. At the moment, the household water machine continues to operate in a refrigeration mode, the household water machine is easily damaged, the service life is shortened, and if the water side heat exchanger is frozen, the whole machine set is scrapped.
At present, no effective control method for the heating mode of the household water machine exists, and development is urgently needed.
Disclosure of Invention
The invention aims to provide a control method of a household water machine, aiming at the problems in the use of the household water machine at present, which can find the problems of reversing failure of a four-way valve and the like in time and adopt alarming or other measures to ensure the normal operation of a unit.
The technical scheme of the invention is as follows:
a control method of a household water machine comprises the following steps:
1) starting the unit, running a heating mode, and starting timing an operating Time; turning to the next step after S1; wherein, S1 is the set time;
2) and (3) detection: the method comprises the following steps of (1) controlling the air side heat exchanger To have a refrigerant pressure Pc, the water side heat exchanger To have a refrigerant pressure Pd, the water inlet temperature Ti and the water outlet temperature To of the water side heat exchanger, the air side heat exchanger To have a coil pipe temperature Tp, the water side heat exchanger To have an anti-freezing temperature Tf and an ambient temperature Th;
3) if the following two conditions are met simultaneously and the duration is 1 minute, turning to the step 4); otherwise, turning to step 7);
condition a: Tc-Th > T1;
condition B: Td-Ti < T2;
condition C: Tp-Th > T3;
condition D: To-Ti < T4;
condition E: to < T5, or Tf < T5;
wherein Tc is the saturation temperature corresponding to Pc; td is the saturation temperature corresponding to Pd; t1, T2, T3, T4 and T5 are all set temperatures;
4) the compressor is stopped, and the count N is increased by 1; clearing the Time; wherein the count N is initially zero;
5) if N is greater than 5, turning to step 6); otherwise, after 5 minutes, turning to the step 1);
6) the unit is shut down and locked, and a fault alarm is given;
7) the unit keeps running in the original state;
8) if the Time is more than 30 minutes, clearing N; otherwise, keeping the current N;
9) go to step 2).
Further, in step 2), if the temperature sensor fails, the following operations are performed:
i) if the inlet water temperature sensor fails, the inlet water temperature = outlet water temperature-T6; if the water outlet temperature sensor also has a fault, the water inlet temperature = the anti-freezing temperature-T6, and the water outlet temperature = the anti-freezing temperature; wherein T6 is a set temperature, and T6 is more than 0 and less than or equal to 5 ℃;
ii) if the water outlet temperature sensor fails, the water outlet temperature = water inlet temperature + T7; if the water inlet temperature sensor also has a fault, the water inlet temperature = the anti-freezing temperature-T6, and the water outlet temperature = the anti-freezing temperature; wherein T7 is a set temperature, and T7 is more than 0 and less than or equal to 5 ℃;
iii) if the antifreeze temperature sensor fails, then the antifreeze temperature = the effluent temperature; if the water outlet temperature sensor also has a fault, the anti-freezing temperature = the water inlet temperature;
iv) if the ring temperature sensor fails, the unit displays the corresponding sensor failure and operates, and the ring temperature = T8; wherein T8 is a set temperature, and T8 is more than-10 and less than or equal to 10 ℃;
v) if the coil temperature sensor fails, the unit reports the coil temperature sensor failure and the unit is shut down.
The invention has the beneficial effects that:
the invention has reasonable design and convenient control, can judge whether the four-way valve successfully commutates in time by detecting the parameters of the refrigerant pressure of the air side heat exchanger and the like in the heating mode, and ensures the normal operation of the household water machine by measures of alarming prompt, direct shutdown and the like.
Detailed Description
The present invention will be further described with reference to the following examples.
A household water machine comprises an air side heat exchanger and a water side heat exchanger. Pressure sensors are respectively arranged on the air side heat exchanger and the water side heat exchanger, and can detect corresponding refrigerant pressure. Still be equipped with temperature sensor on this wind side heat exchanger's the coil pipe, can detect the coil pipe temperature. The water side heat exchanger is a shell and tube heat exchanger, and a water channel port in the water side heat exchanger are respectively provided with a temperature sensor, so that the anti-freezing temperature, the water inlet temperature and the water outlet temperature can be detected.
The invention discloses a control method of a household water machine, which comprises the following steps:
1) starting the unit, running a heating mode, and starting timing an operating Time; turning to the next step after S1; wherein, S1 is the set time; preferably, the S1 is 1-10 Min;
2) and (3) detection: the method comprises the following steps of (1) controlling the air side heat exchanger To have a refrigerant pressure Pc, the water side heat exchanger To have a refrigerant pressure Pd, the water inlet temperature Ti and the water outlet temperature To of the water side heat exchanger, the air side heat exchanger To have a coil pipe temperature Tp, the water side heat exchanger To have an anti-freezing temperature Tf and an ambient temperature Th;
3) if the following two conditions are met simultaneously and the duration is 1 minute, turning to the step 4); otherwise, turning to step 7);
condition a: Tc-Th > T1;
condition B: Td-Ti < T2;
condition C: Tp-Th > T3;
condition D: To-Ti < T4;
condition E: to < T5, or Tf < T5;
wherein Tc is the saturation temperature corresponding to Pc; td is the saturation temperature corresponding to Pd; t1, T2, T3, T4 and T5 are all set temperatures; preferably, T1, T2, T3 and T4 are all preset to 0 ℃; t5 is preset to 1 ℃;
4) the compressor is stopped, and the count N is increased by 1; clearing the Time; wherein the count N is initially zero;
5) if N is greater than 5, turning to step 6); otherwise, after 5 minutes, turning to the step 1);
6) the unit is shut down and locked, and a fault alarm is given;
7) the unit keeps running in the original state;
8) if the Time is more than 30 minutes, clearing N; otherwise, keeping the current N;
9) go to step 2).
In order to improve the stability of the unit operation, when the step 2) is operated, if a temperature sensor fails, the following operations may be performed:
i) if the inlet water temperature sensor fails, the inlet water temperature = outlet water temperature-T6; if the water outlet temperature sensor also has a fault, the water inlet temperature = the anti-freezing temperature-T6, and the water outlet temperature = the anti-freezing temperature; wherein T6 is more than 0 and less than or equal to 5 ℃;
ii) if the water outlet temperature sensor fails, the water outlet temperature = water inlet temperature + T7; if the water inlet temperature sensor also has a fault, the water inlet temperature = the anti-freezing temperature-T6, and the water outlet temperature = the anti-freezing temperature; t7 is more than 0 and less than or equal to 5 ℃;
iii) if the antifreeze temperature sensor fails, then the antifreeze temperature = the effluent temperature; if the water outlet temperature sensor also has a fault, the anti-freezing temperature = the water inlet temperature;
iv) if the ring temperature sensor fails, the unit displays the corresponding sensor failure and continues to operate, and the ring temperature = T8, and-10 < T8 is less than or equal to 10 ℃;
v) if the coil temperature sensor fails, the unit reports the failure of the coil temperature sensor, and the unit can not carry out heating operation, and the control program stops.
The invention can detect the parameters of the refrigerant pressure of the wind side heat exchanger and the like through the related sensors of the unit in the heating mode, judge whether the four-way valve is successfully reversed or not in time through condition judgment, and ensure the normal operation of the household water machine through measures such as alarm prompt or direct shutdown and the like.
The parts not involved in the present invention are the same as or can be implemented using the prior art.
Claims (2)
1. A control method of a household water machine is characterized by comprising the following steps:
1) starting the unit, running a heating mode, and starting timing an operating Time; turning to the next step after S1; wherein, S1 is the set time;
2) and (3) detection: the method comprises the following steps of (1) controlling the air side heat exchanger To have a refrigerant pressure Pc, the water side heat exchanger To have a refrigerant pressure Pd, the water inlet temperature Ti and the water outlet temperature To of the water side heat exchanger, the air side heat exchanger To have a coil pipe temperature Tp, the water side heat exchanger To have an anti-freezing temperature Tf and an ambient temperature Th;
3) if the following two conditions are met simultaneously and the duration is 1 minute, turning to the step 4); otherwise, turning to step 7);
condition a: Tc-Th > T1;
condition B: Td-Ti < T2;
condition C: Tp-Th > T3;
condition D: To-Ti < T4;
condition E: to < T5, or Tf < T5;
wherein Tc is the saturation temperature corresponding to Pc; td is the saturation temperature corresponding to Pd; t1, T2, T3, T4 and T5 are all set temperatures;
4) the compressor is stopped, and the count N is increased by 1; clearing the Time; wherein the count N is initially zero;
5) if N is greater than 5, turning to step 6); otherwise, after 5 minutes, turning to the step 1);
6) the unit is shut down and locked, and a fault alarm is given;
7) the unit keeps running in the original state;
8) if the Time is more than 30 minutes, clearing N; otherwise, keeping the current N;
9) go to step 2).
2. The household water machine control method as claimed in claim 1, wherein in step 2), if the temperature sensor fails, the following operations are performed:
i) if the inlet water temperature sensor fails, the inlet water temperature = outlet water temperature-T6; if the water outlet temperature sensor also has a fault, the water inlet temperature = the anti-freezing temperature-T6, and the water outlet temperature = the anti-freezing temperature; wherein T6 is a set temperature, and T6 is more than 0 and less than or equal to 5 ℃;
ii) if the water outlet temperature sensor fails, the water outlet temperature = water inlet temperature + T7; if the water inlet temperature sensor also has a fault, the water inlet temperature = the anti-freezing temperature-T6, and the water outlet temperature = the anti-freezing temperature; wherein T7 is a set temperature, and T7 is more than 0 and less than or equal to 5 ℃;
iii) if the antifreeze temperature sensor fails, then the antifreeze temperature = the effluent temperature; if the water outlet temperature sensor also has a fault, the anti-freezing temperature = the water inlet temperature;
iv) if the ring temperature sensor fails, the unit displays the corresponding sensor failure and operates, and the ring temperature = T8; wherein T8 is a set temperature, and T8 is more than-10 and less than or equal to 10 ℃;
v) if the coil temperature sensor fails, the unit reports the coil temperature sensor failure and the unit is shut down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111453493.0A CN114046591A (en) | 2021-12-01 | 2021-12-01 | Control method for household water machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111453493.0A CN114046591A (en) | 2021-12-01 | 2021-12-01 | Control method for household water machine |
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| CN114046591A true CN114046591A (en) | 2022-02-15 |
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|---|---|---|---|
| CN202111453493.0A Pending CN114046591A (en) | 2021-12-01 | 2021-12-01 | Control method for household water machine |
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| CN112393463A (en) * | 2020-11-18 | 2021-02-23 | 广东纽恩泰新能源科技发展有限公司 | Self-adaptive adjustment method for temperature probe fault of air source heat pump system |
| CN112728978A (en) * | 2020-12-31 | 2021-04-30 | 浙江中广电器股份有限公司 | Air conditioning system with plate heat exchanger and anti-freezing control method thereof |
| CN113623706A (en) * | 2020-05-09 | 2021-11-09 | 艾默生环境优化技术(苏州)有限公司 | Anti-freezing protection method, anti-freezing protection system and water system heat pump unit |
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2021
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Application publication date: 20220215 |
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