CN106813322B - A kind of air conditioning pressure protection system and air conditioner refrigerating, heating pressure protection method - Google Patents
A kind of air conditioning pressure protection system and air conditioner refrigerating, heating pressure protection method Download PDFInfo
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- CN106813322B CN106813322B CN201510851380.4A CN201510851380A CN106813322B CN 106813322 B CN106813322 B CN 106813322B CN 201510851380 A CN201510851380 A CN 201510851380A CN 106813322 B CN106813322 B CN 106813322B
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/32—Refrigerant piping for connecting the separate outdoor units to indoor units
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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
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air conditioning pressure protection system and air conditioner refrigeratings, heating pressure protection method, and system includes compressor, outdoor unit heat exchanger, indoor set heat exchanger；Outdoor unit electric expansion valve is installed in the liquid pipe of outdoor unit heat exchanger, electronic expansion valve of indoor unit is installed in the liquid pipe of machine heat exchanger indoors；First temp, sensor of outdoor unit, the second temp, sensor of outdoor unit are installed on outdoor unit heat exchanger coil pipe, the first indoor machine temperature sensor is installed in the liquid pipe of machine heat exchanger indoors, the second indoor machine temperature sensor is installed on the tracheae of machine heat exchanger indoors.Air conditioning pressure protection system of the invention and air conditioner refrigerating, heating pressure protection method; the temperature simulation system pressure obtained by temperature sensor; and by reducing compressor frequency and increasing electronic expansion valve opening come regulating system pressure; to in air conditioner refrigerating and heating operations; so that system pressure is in normal range (NR), high voltage/low voltage failure is avoided the occurrence of.
Description
Technical field
The invention belongs to air-conditioning technical fields, specifically, being to be related to a kind of air conditioning pressure protection system, air conditioner refrigerating pressure
It tries hard to keep maintaining method, air-conditioning heating pressure protection method.
Background technique
Air-conditioner outdoor unit installation environment is more severe, and in summer high temperature weather and cold season in winter, outdoor unit is often produced
Raw high pressure or low voltage failure, cause system pressure not normal.
Summary of the invention
The present invention provides a kind of air conditioning pressure protection system and air conditioner refrigeratings, heating pressure protection method, so that being
System pressure is in normal range (NR).
It is achieved in order to solve the above technical problems, the present invention adopts the following technical solutions:
A kind of air conditioning pressure protection system, including compressor, outdoor unit heat exchanger, indoor set heat exchanger, the gas of compressor
Pipe is connect with the tracheae of outdoor unit heat exchanger, and the liquid pipe of outdoor unit heat exchanger is connect with the liquid pipe of machine heat exchanger indoors, indoor
The tracheae of machine heat exchanger and another tracheae of compressor connect；Outdoor electromechanics is installed in the liquid pipe of the outdoor unit heat exchanger
Sub- expansion valve is equipped with electronic expansion valve of indoor unit in the liquid pipe of the indoor set heat exchanger；In outdoor unit heat exchanger coil pipe
On the first temp, sensor of outdoor unit, the second temp, sensor of outdoor unit are installed, installed in the liquid pipe of machine heat exchanger indoors
There is the first indoor machine temperature sensor, the second indoor machine temperature sensor is installed on the tracheae of machine heat exchanger indoors.
Further, after first temp, sensor of outdoor unit is mounted on first hair fastener pipe of outdoor unit heat exchanger out
Elbow on；Second temp, sensor of outdoor unit is mounted on the liquid separation branch pipe of outdoor unit heat exchanger liquid pipe.
A kind of air conditioner refrigerating pressure protection method, including outdoor unit heat exchanger guard method and air conditioner refrigerating when air conditioner refrigerating
When indoor set heat exchanger guard method:
Outdoor unit heat exchanger guard method includes: when the air conditioner refrigerating
Obtain outdoor unit heat exchanger coil temperature；
Judge whether the coil temperature is more than or equal to refrigeration upper limit value；
If so, reducing compressor operation frequency；
Indoor set heat exchanger guard method includes: when the air conditioner refrigerating
Obtain indoor set heat exchanger liquid pipe temperature；
Judge whether the liquid pipe temperature is less than or equal to the lower limit value that freezes；
If so, increasing electronic expansion valve of indoor unit aperture.
Further, while the increase electronic expansion valve of indoor unit aperture, the method also includes: reduce pressure
Contracting machine operating frequency.
Further, the acquisition outdoor unit heat exchanger coil temperature specifically includes: obtaining outdoor unit heat exchanger first
Root hair fastener pipe come out after elbow on temperature.
Preferably, the refrigeration upper limit value is 57 DEG C, and the refrigeration lower limit value is -6 DEG C.
A kind of air-conditioning heating pressure protection method, including indoor set heat exchanger guard method and air-conditioning heating when air-conditioning heating
When outdoor unit heat exchanger guard method:
Indoor set heat exchanger guard method includes: when the air-conditioning heating
Obtain indoor set heat exchanger tracheae temperature；
Judge whether the tracheae temperature is more than or equal to heating upper limit value；
If so, reducing compressor operation frequency；
Outdoor unit heat exchanger guard method includes: when the air-conditioning heating
Obtain outdoor unit heat exchanger coil temperature；
Judge whether the coil temperature is less than or equal to heat lower limit value；
If so, increasing outdoor unit electronic expansion valve opening.
Further, while the increase electronic expansion valve of indoor unit aperture, the method also includes: reduce pressure
Contracting machine operating frequency.
Further, the acquisition outdoor unit heat exchanger coil temperature specifically includes: obtaining outdoor unit heat exchanger liquid pipe
Liquid separation branch pipe on temperature.
Preferably, the heating upper limit value is 60 DEG C, and the heating lower limit value is -20 DEG C.
Compared with prior art, the advantages and positive effects of the present invention are: air conditioning pressure of the invention protection system and
Air conditioner refrigerating, heating pressure protection method, the temperature simulation system pressure obtained by temperature sensor, and by reducing compression
Unit frequency and increase electronic expansion valve opening carry out regulating system pressure, thus in air conditioner refrigerating and heating operations, so that system
Pressure is in normal range (NR), avoids the occurrence of high voltage/low voltage failure.
After a specific embodiment of the invention is read in conjunction with the figure, the other features and advantages of the invention will become more clear
Chu.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of air conditioning pressure protection system proposed by the invention；
Outdoor unit heat exchanger protection side when Fig. 2 is the air conditioner refrigerating of air conditioner refrigerating pressure protection method proposed by the invention
The flow chart of method；
Indoor set heat exchanger protection side when Fig. 3 is the air conditioner refrigerating of air conditioner refrigerating pressure protection method proposed by the invention
The flow chart of method；
Indoor set heat exchanger protection side when Fig. 4 is the air-conditioning heating of air-conditioning heating pressure protection method proposed by the invention
The flow chart of method；
Outdoor unit heat exchanger protection side when Fig. 5 is the air-conditioning heating of air-conditioning heating pressure protection method proposed by the invention
The flow chart of method.
Appended drawing reference:
1, compressor；2, four-way valve；3, outdoor unit heat exchanger；4, the first temp, sensor of outdoor unit；5, the second outdoor unit
Temperature sensor；6, outdoor unit electric expansion valve；7, electronic expansion valve of indoor unit；8, the first indoor machine temperature sensor；9,
Two indoor machine temperature sensors；10, indoor set heat exchanger；11, gas-liquid separator.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to drawings and examples,
Invention is further described in detail.
The air conditioning pressure of the present embodiment protects system, mainly includes compressor 1, outdoor unit heat exchanger 3, indoor set heat exchanger
10, gas-liquid separator 11, four-way valve 2 etc., it is shown in Figure 1, the tracheae of compressor 1 (tracheae is exhaust pipe in process of refrigerastion,
The tracheae is air intake duct in heating operations) it is connect by four-way valve 2 with the tracheae of outdoor unit heat exchanger 3, outdoor unit heat exchanger 3
Liquid pipe is connect with the liquid pipe of machine heat exchanger 10 indoors, and the tracheae of indoor set heat exchanger 10 passes through four-way valve 2 and gas-liquid separator
(tracheae is air intake duct to another tracheae of 11 connections, gas-liquid separator 11 and compressor 1 in process of refrigerastion, should in heating operations
Tracheae is exhaust pipe) connection.
Outdoor unit electric expansion valve 6 is installed in the liquid pipe of outdoor unit heat exchanger 3, indoors the liquid pipe of machine heat exchanger 10
On electronic expansion valve of indoor unit 7 is installed.
There are two sensors for installation on 3 coil pipe of outdoor unit heat exchanger: outside the first temp, sensor of outdoor unit 4, second Room
Machine temperature sensor 5.After first temp, sensor of outdoor unit 4 is specifically mounted on 3 first hair fastener pipes of outdoor unit heat exchanger out
Elbow on；Second temp, sensor of outdoor unit 5 is mounted on the liquid separation branch pipe of 3 liquid pipe of outdoor unit heat exchanger.
First indoor machine temperature sensor 8 is installed indoors, indoors machine heat exchanger 10 in the liquid pipe of machine heat exchanger 10
Tracheae on the second indoor machine temperature sensor 9 is installed.
Air conditioner refrigerating process: the high pressure gaseous refrigerant that compressor 1 is discharged passes through four-way valve 2(d-c) it is transmitted to outdoor
Machine heat exchanger 3(is condenser at this time) it is condensed, condensed liquid refrigerants passes through outdoor unit electric expansion valve 6, indoor unit
It is evaporator that electric expansion valve 7 is transmitted to indoor set heat exchanger 10(at this time), pass through four-way valve 2(e-s after being evaporated) transmission
To gas-liquid separator 11, compressor 1 is flowed back to by gas-liquid separator 11.
In process of refrigerastion, the first temp, sensor of outdoor unit 4 obtains the coil temperature of outdoor unit heat exchanger 3, and transmits
To air-conditioner controller, air-conditioner controller compares the size of coil temperature and upper limit value of freezing, if coil temperature is more than or equal to system
Cold upper limit value (for example, refrigeration upper limit value is 57 DEG C), illustrates that the condensing pressure of outdoor unit heat exchanger 3 has reached the upper limit value (example
Such as, upper limit value 3.5MPa), then air-conditioner controller reduces compressor operation frequency, so that system pressure reduces, guarantees system pressure
Power is in normal range (NR).
In process of refrigerastion, the first indoor machine temperature sensor 8 obtains the liquid pipe temperature of indoor set heat exchanger 10, and transmits
To air-conditioner controller, the size of air-conditioning air conditioner comparison liquid tube temperature degree and refrigeration lower limit value, if liquid pipe temperature is less than or equal to system
Cold lower limit value (for example, refrigeration lower limit value is -6 DEG C), illustrates that the evaporating pressure of indoor set heat exchanger 10 has reached lower limit value (example
Such as, lower limit value 0.5MPa), then the aperture of air-conditioner controller control electronic expansion valve of indoor unit 7 increases (at the same time it can also drop
Low compressor operating frequency) so that system pressure increases, to guarantee that system pressure is in normal range (NR).
Air-conditioning heating process: the high pressure gaseous refrigerant that compressor 1 is discharged passes through four-way valve 2(d-e) it is transmitted to interior
Machine heat exchanger 10(is condenser at this time) it is condensed, condensed liquid refrigerants passes through electronic expansion valve of indoor unit 7, outdoor unit
It is evaporator that electric expansion valve 6 is transmitted to outdoor unit heat exchanger 3(at this time), pass through four-way valve 2(c-s after being evaporated) be transmitted to
Gas-liquid separator 11 flows back to compressor 1 by gas-liquid separator 11.
In heating operations, the second indoor machine temperature sensor 9 obtains the tracheae temperature of indoor set heat exchanger 3, and transmits
To air-conditioner controller, air-conditioner controller compares tracheae temperature and heats the size of upper limit value, if tracheae temperature is more than or equal to system
Hot upper limit value (for example, heating upper limit value is 60 DEG C), illustrates that the condensing pressure of indoor set heat exchanger 3 has reached the upper limit value (example
Such as, upper limit value 3.7MPa), then air-conditioner controller reduces compressor operation frequency, so that system pressure reduces, guarantees system pressure
Power is in normal range (NR).
In heating operations, the second temp, sensor of outdoor unit 5 obtains the coil temperature of outdoor unit heat exchanger 3, and transmits
To air-conditioner controller, air-conditioner controller compares coil temperature and heats the size of lower limit value, if coil temperature is less than or equal to system
Hot lower limit value (for example, heating lower limit value is -20 DEG C), illustrates that the evaporating pressure of outdoor unit heat exchanger 3 has reached lower limit value (example
Such as, lower limit value 0.3MPa), then the aperture of air-conditioner controller control electronic expansion valve of indoor unit 7 increases (at the same time it can also drop
Low compressor operating frequency) so that system pressure increases, to guarantee that system pressure is in normal range (NR).
Based on the design of above-mentioned air conditioning pressure protection system, the present embodiment also proposed a kind of air conditioner refrigerating pressure protection side
Method is mainly used in during air conditioner refrigerating, including outdoor unit heat exchanger guard method and room when air conditioner refrigerating when air conditioner refrigerating
Interior machine heat exchanger guard method.
Shown in Figure 2, outdoor unit heat exchanger guard method includes the following steps: when air conditioner refrigerating
Step S11: outdoor unit heat exchanger coil temperature is obtained.
Outdoor unit heat exchanger coil temperature is obtained by the first temp, sensor of outdoor unit, is to obtain outdoor specifically
First hair fastener pipe of machine heat exchanger come out after elbow on temperature.
Step S12: judge whether coil temperature is more than or equal to refrigeration upper limit value.
If it is, entering step S13.
In the present embodiment, refrigeration upper limit value is 57 DEG C.
Step S13: compressor operation frequency is reduced.
When outdoor unit heat exchanger coil temperature is more than or equal to 57 DEG C of upper limit value of refrigeration, illustrate the condensation of outdoor unit heat exchanger
Pressure has reached the upper limit value 3.5MPa, and condensing pressure is excessively high, i.e., system pressure is excessively high, needs to reduce compressor operation frequency
It reduces system pressure and avoids the occurrence of high voltage fault so that system pressure be made to be in normal range (NR).
Shown in Figure 3, indoor set heat exchanger guard method includes the following steps: when air conditioner refrigerating
Step S21: indoor set heat exchanger liquid pipe temperature is obtained.
The liquid pipe temperature of indoor set heat exchanger is obtained by the first indoor machine temperature sensor.
Step S22: judge whether the liquid pipe temperature is less than or equal to the lower limit value that freezes.
If so, entering step S23.
In the present embodiment, refrigeration lower limit value is -6 DEG C.
Step S23: increase electronic expansion valve of indoor unit aperture.
When indoor set heat exchanger liquid pipe temperature is less than or equal to -6 DEG C of lower limit value of refrigeration, illustrate the evaporation of indoor set heat exchanger
Pressure has reached lower limit value 0.5MPa, and evaporating pressure is too low, i.e., system pressure is too low, needs to increase electronic expansion valve of indoor unit
Aperture carry out lifting system pressure, so that system pressure be made to be in normal range (NR), avoid the occurrence of low voltage failure.
While increasing electronic expansion valve of indoor unit aperture, compressor operation frequency can also be reduced, so that system pressure
Overcome and is promoted to normal range (NR) fastly.
The air conditioner refrigerating pressure protection method of the present embodiment, the temperature simulation system pressure obtained by two temperature sensors
Power, to guarantee that system pressure is in normal range (NR) during air conditioner refrigerating, avoid the occurrence of high voltage/low voltage failure.
Based on the design of above-mentioned air conditioning pressure protection system, the present embodiment also proposed a kind of air-conditioning heating pressure protection side
Method is mainly used in during air-conditioning heating, including indoor set heat exchanger guard method and room when air-conditioning heating when air-conditioning heating
Outer machine heat exchanger guard method.
Shown in Figure 4, indoor set heat exchanger guard method includes the following steps: when air-conditioning heating
Step S31: indoor set heat exchanger tracheae temperature is obtained.
The tracheae temperature of indoor set heat exchanger is obtained by the second indoor machine temperature sensor.
Step S32: judge whether tracheae temperature is more than or equal to heating upper limit value.
If so, entering step S33.
In the present embodiment, heating upper limit value is 60 DEG C.
Step S33: compressor operation frequency is reduced.
When indoor set heat exchanger tracheae temperature is more than or equal to 60 DEG C of upper limit value of heating, illustrate the condensation of indoor set heat exchanger
Pressure has reached the upper limit value 3.7MPa, and condensing pressure is excessively high, i.e., system pressure is excessively high, needs to reduce compressor operation frequency
It reduces system pressure and avoids the occurrence of high voltage fault so that system pressure be made to be in normal range (NR).
Shown in Figure 5, outdoor unit heat exchanger guard method includes the following steps: when air-conditioning heating
Step S41: outdoor unit heat exchanger coil temperature is obtained.
Outdoor unit heat exchanger coil temperature is obtained by the second temp, sensor of outdoor unit, is to obtain outdoor specifically
The temperature of the liquid separation branch pipe of machine heat exchanger liquid pipe.
Step S42: judge whether the coil temperature is less than or equal to heat lower limit value.
If so, entering step S43.
In the present embodiment, heating lower limit value is -20 DEG C.
Step S43: increase outdoor unit electronic expansion valve opening.
When it is -20 DEG C that outdoor unit heat exchanger coil temperature, which is less than or equal to heating lower limit value, illustrate outdoor unit heat exchanger
Evaporating pressure has reached lower limit value 0.3MPa, and evaporating pressure is too low, i.e., system pressure is too low, and it is swollen to need to increase outdoor unit electronics
The aperture of swollen valve carrys out lifting system pressure, so that system pressure be made to be in normal range (NR), avoids the occurrence of low voltage failure.
While increasing outdoor unit electronic expansion valve opening, compressor operation frequency can also be reduced, so that system pressure
Overcome fast improve to normal range (NR).
The air-conditioning heating pressure protection method of the present embodiment, the temperature simulation system pressure obtained by two temperature sensors
Power, to guarantee that system pressure is in normal range (NR) during air-conditioning heating, avoid the occurrence of high voltage/low voltage failure.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited；Although referring to aforementioned reality
Applying example, invention is explained in detail, for those of ordinary skill in the art, still can be to aforementioned implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these are modified or replace
It changes, the spirit and scope for claimed technical solution of the invention that it does not separate the essence of the corresponding technical solution.
Claims (10)
1. a kind of air conditioner refrigerating pressure protection method of air conditioning pressure protection system, it is characterised in that: the air conditioning pressure protection
System includes compressor, outdoor unit heat exchanger, indoor set heat exchanger, and the tracheae of compressor and the tracheae of outdoor unit heat exchanger connect
It connects, the liquid pipe of outdoor unit heat exchanger is connect with the liquid pipe of machine heat exchanger indoors, the tracheae of indoor set heat exchanger and compressor
Another tracheae connection；Outdoor unit electric expansion valve is installed in the liquid pipe of the outdoor unit heat exchanger, is changed in the indoor unit
Electronic expansion valve of indoor unit is installed in the liquid pipe of hot device；First outdoor unit temperature biography is installed on outdoor unit heat exchanger coil pipe
Sensor, the second temp, sensor of outdoor unit are equipped with the first indoor machine temperature sensor in the liquid pipe of machine heat exchanger indoors,
Second indoor machine temperature sensor is installed on the tracheae of indoor set heat exchanger；
Outdoor unit heat exchanger guard method and room when air conditioner refrigerating when the air conditioner refrigerating pressure protection method includes air conditioner refrigerating
Interior machine heat exchanger guard method:
Outdoor unit heat exchanger guard method includes: when the air conditioner refrigerating
Obtain outdoor unit heat exchanger coil temperature；
Judge whether the coil temperature is more than or equal to refrigeration upper limit value；
If so, reducing compressor operation frequency；
Indoor set heat exchanger guard method includes: when the air conditioner refrigerating
Obtain indoor set heat exchanger liquid pipe temperature；
Judge whether the liquid pipe temperature is less than or equal to the lower limit value that freezes；
If so, increasing electronic expansion valve of indoor unit aperture.
2. air conditioner refrigerating pressure protection method according to claim 1, it is characterised in that: the first outdoor unit temperature passes
Sensor is mounted on the elbow after first hair fastener pipe of outdoor unit heat exchanger comes out；The second temp, sensor of outdoor unit installation
On the liquid separation branch pipe of outdoor unit heat exchanger liquid pipe.
3. air conditioner refrigerating pressure protection method according to claim 1, it is characterised in that: in the increase indoor unit electronics
While expansion valve opening, the method also includes:
Reduce compressor operation frequency.
4. air conditioner refrigerating pressure protection method according to claim 1, it is characterised in that: the acquisition outdoor unit heat exchanger
Coil temperature specifically includes:
Obtain the temperature on the elbow after first hair fastener pipe of outdoor unit heat exchanger comes out.
5. air conditioner refrigerating pressure protection method according to claim 1, it is characterised in that: the refrigeration upper limit value is 57
DEG C, the refrigeration lower limit value is -6 DEG C.
6. a kind of air-conditioning heating pressure protection method of air conditioning pressure protection system, it is characterised in that: the air conditioning pressure protection
System includes compressor, outdoor unit heat exchanger, indoor set heat exchanger, and the tracheae of compressor and the tracheae of outdoor unit heat exchanger connect
It connects, the liquid pipe of outdoor unit heat exchanger is connect with the liquid pipe of machine heat exchanger indoors, the tracheae of indoor set heat exchanger and compressor
Another tracheae connection；Outdoor unit electric expansion valve is installed in the liquid pipe of the outdoor unit heat exchanger, is changed in the indoor unit
Electronic expansion valve of indoor unit is installed in the liquid pipe of hot device；First outdoor unit temperature biography is installed on outdoor unit heat exchanger coil pipe
Sensor, the second temp, sensor of outdoor unit are equipped with the first indoor machine temperature sensor in the liquid pipe of machine heat exchanger indoors,
Second indoor machine temperature sensor is installed on the tracheae of indoor set heat exchanger；
Indoor set heat exchanger guard method and room when air-conditioning heating when the air-conditioning heating pressure protection method includes air-conditioning heating
Outer machine heat exchanger guard method:
Indoor set heat exchanger guard method includes: when the air-conditioning heating
Obtain indoor set heat exchanger tracheae temperature；
Judge whether the tracheae temperature is more than or equal to heating upper limit value；
If so, reducing compressor operation frequency；
Outdoor unit heat exchanger guard method includes: when the air-conditioning heating
Obtain outdoor unit heat exchanger coil temperature；
Judge whether the coil temperature is less than or equal to heat lower limit value；
If so, increasing outdoor unit electronic expansion valve opening.
7. air-conditioning heating pressure protection method according to claim 6, it is characterised in that: the first outdoor unit temperature passes
Sensor is mounted on the elbow after first hair fastener pipe of outdoor unit heat exchanger comes out；The second temp, sensor of outdoor unit installation
On the liquid separation branch pipe of outdoor unit heat exchanger liquid pipe.
8. air-conditioning heating pressure protection method according to claim 6, it is characterised in that: in the increase outdoor unit electronics
While expansion valve opening, the method also includes:
Reduce compressor operation frequency.
9. air-conditioning heating pressure protection method according to claim 6, it is characterised in that: the acquisition outdoor unit heat exchanger
Coil temperature specifically includes:
Obtain the temperature on the liquid separation branch pipe of outdoor unit heat exchanger liquid pipe.
10. air-conditioning heating pressure protection method according to claim 6, it is characterised in that: the heating upper limit value is 60
DEG C, the heating lower limit value is -20 DEG C.
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| CN201510851380.4A CN106813322B (en) | 2015-11-30 | 2015-11-30 | A kind of air conditioning pressure protection system and air conditioner refrigerating, heating pressure protection method |
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| CN201510851380.4A CN106813322B (en) | 2015-11-30 | 2015-11-30 | A kind of air conditioning pressure protection system and air conditioner refrigerating, heating pressure protection method |
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| CN101978227A (en) * | 2008-03-24 | 2011-02-16 | 大金工业株式会社 | Refrigeration apparatus |
| CN102901293A (en) * | 2012-11-09 | 2013-01-30 | 四川长虹空调有限公司 | Air conditioner for precisely regulating electronic expansion valve and control method thereof |
| CN105091440A (en) * | 2014-05-20 | 2015-11-25 | Tcl空调器(中山)有限公司 | Control method and device of electronic expansion valve |
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| JPH02171562A (en) * | 1988-12-26 | 1990-07-03 | Toshiba Corp | Freezing cycle device |
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|---|---|---|---|---|
| CN1455186A (en) * | 2002-05-01 | 2003-11-12 | 三星电子株式会社 | Air conditioner and method for detecting refrigrant leakage |
| CN101978227A (en) * | 2008-03-24 | 2011-02-16 | 大金工业株式会社 | Refrigeration apparatus |
| CN102901293A (en) * | 2012-11-09 | 2013-01-30 | 四川长虹空调有限公司 | Air conditioner for precisely regulating electronic expansion valve and control method thereof |
| CN105091440A (en) * | 2014-05-20 | 2015-11-25 | Tcl空调器(中山)有限公司 | Control method and device of electronic expansion valve |
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