CN105485992A - Air conditioning system and refrigerant shortage detecting method thereof - Google Patents
Air conditioning system and refrigerant shortage detecting method thereof Download PDFInfo
- Publication number
- CN105485992A CN105485992A CN201610012172.XA CN201610012172A CN105485992A CN 105485992 A CN105485992 A CN 105485992A CN 201610012172 A CN201610012172 A CN 201610012172A CN 105485992 A CN105485992 A CN 105485992A
- Authority
- CN
- China
- Prior art keywords
- superheat
- compressor
- air
- degree
- conditioning system
- 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.)
- Granted
Links
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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/24—Low amount of refrigerant in the system
-
- 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
- F25B2700/19—Pressures
- F25B2700/193—Pressures 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a refrigerant shortage detecting method of an air conditioning system. The refrigerant shortage detecting method comprises the steps of: detecting air return pressure of a compressor, and obtaining a corresponding evaporation saturation temperature according to the air return pressure of the compressor; obtaining an inlet superheat degree of a liquid storage tank, an air return superheat degree of the compressor and an exhaust superheat degree of the compressor; and judging that the air conditioning system generates the refrigerant shortage condition when the evaporation saturation temperature is lower than a preset value if the inlet superheat degree of the liquid storage tank is higher than and equal to a first preset superheat degree, the air return superheat degree of the compressor is higher than and equal to a second preset superheat degree and the exhaust superheat degree of the compressor is higher than and equal to a third preset superheat degree. The refrigerant shortage detecting method of the air conditioning system can timely and accurately detect if the air conditioning system is located in a refrigerant shortage state, can prompt users or maintainers to timely detect the system to replenish refrigerant, can bring convenience for the system to automatically adjust the refrigerant, and is low in detecting cost. The invention further discloses an air conditioning system.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of deficient refrigerant detection method of air-conditioning system and a kind of air-conditioning system.
Background technology
In business air conditioner or domestic air conditioning, for the problem that anti-locking system lacks refrigerant and cause cooling system heating effect bad, need for Operation system setting owes refrigerant signal testing function, like this by owing refrigerant signal detection, user or maintenance personal can be pointed out to carry out system overhaul to carry out filling refrigerant, also under some operating mode, the flow direction of refrigerant can be controlled by the combination of the valve body in regulating system stream, thus regulate the ability output effect of machine in cooling and warming.
And when at present deficient refrigerant signal detection being carried out to air-conditioning system, or detect accurately not prompt enough, or the checkout gear needing cost higher, therefore need to improve the deficient refrigerant detection technique of air-conditioning system.
Summary of the invention
The present invention is intended to solve one of technical problem in above-mentioned technology at least to a certain extent.For this reason, one object of the present invention is the deficient refrigerant detection method proposing a kind of detection with low cost air-conditioning system promptly and accurately.
Another object of the present invention is to propose a kind of air-conditioning system.
For achieving the above object, the deficient refrigerant detection method of a kind of air-conditioning system that one aspect of the present invention embodiment proposes, comprise the following steps: the back pressure detecting compressor in air-conditioning system, and obtain corresponding evaporation saturation temperature according to the back pressure of described compressor; Obtain the discharge superheat of the inlet superheat degree of fluid reservoir in described air-conditioning system, the return-air degree of superheat of described compressor and described compressor; When described evaporation saturation temperature is less than preset value, if the inlet superheat degree of described fluid reservoir is more than or equal to, first presets the degree of superheat, the return-air degree of superheat of described compressor is more than or equal to the second default degree of superheat and the discharge superheat of described compressor is more than or equal to the 3rd default degree of superheat, then judge that described air-conditioning system occurs to owe refrigerant situation.
According to the deficient refrigerant detection method of the air-conditioning system of the embodiment of the present invention, first by detecting the back pressure of compressor to obtain corresponding evaporation saturation temperature, and obtain the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and the discharge superheat of compressor, then when evaporating saturation temperature and being less than preset value, to the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and the discharge superheat of compressor judge, if the inlet superheat degree of fluid reservoir is more than or equal to first preset the degree of superheat, the return-air degree of superheat of compressor is more than or equal to second and presets the degree of superheat, and the discharge superheat of compressor is more than or equal to the 3rd default degree of superheat, then judge that air-conditioning system occurs to owe refrigerant situation, thus automatically can detect that air-conditioning system is current timely and accurately and whether be in deficient refrigerant state, not only reminding user or maintenance personal can carry out system overhaul in time with coolant adding, system can also be facilitated automatically to carry out refrigerant adjustment, and testing cost is cheap, bring convenience to user.
According to one embodiment of present invention, the inlet superheat degree of described fluid reservoir is obtained according to following formula:
ACSH＝T6-Te，
Wherein, ACSH is the inlet superheat degree of described fluid reservoir, and T6 is the inlet temperature of described fluid reservoir, and Te is described evaporation saturation temperature.
According to one embodiment of present invention, the return-air degree of superheat of described compressor is obtained according to following formula:
SSH＝T7-Te，
Wherein, SSH is the return-air degree of superheat of described compressor, and T7 is the suction temperature of described compressor, and Te is described evaporation saturation temperature.
According to one embodiment of present invention, the discharge superheat of described compressor is obtained according to following formula:
DSH＝T71-Tc，
Wherein, DSH is the discharge superheat of described compressor, and T71 is the delivery temperature of described compressor, and Tc is exhaust saturation temperature corresponding to the pressure at expulsion of described compressor.
In an embodiment of the present invention, described air-conditioning system test running in a chiller mode.
For achieving the above object, a kind of air-conditioning system that the present invention's another aspect embodiment proposes, comprising: compressor, cross valve, the first port of described cross valve is connected with the exhaust outlet of compressor, outdoor heat exchanger, one end of described outdoor heat exchanger is connected with the second port of described cross valve, choke valve, one end of described choke valve is connected with the other end of described outdoor heat exchanger, indoor heat exchanger, one end of described indoor heat exchanger is connected with the other end of described choke valve, and the other end of described indoor heat exchanger is connected with the 3rd port of described cross valve, fluid reservoir, the entrance of described fluid reservoir is connected with the 4th port of described cross valve, and the outlet of described fluid reservoir is connected with the gas returning port of described compressor, control module, described control module is by detecting the back pressure of described compressor to obtain corresponding evaporation saturation temperature, and obtain the inlet superheat degree of described fluid reservoir, the return-air degree of superheat of described compressor and the discharge superheat of described compressor, and when described evaporation saturation temperature is less than preset value, if the inlet superheat degree of described fluid reservoir is more than or equal to first preset the degree of superheat, the return-air degree of superheat of described compressor is more than or equal to second and presets the degree of superheat, and the discharge superheat of described compressor is more than or equal to the 3rd default degree of superheat, described control module then judges that described air-conditioning system occurs to owe refrigerant situation.
According to the air-conditioning system of the embodiment of the present invention, control module is by detecting the back pressure of compressor to obtain corresponding evaporation saturation temperature, and obtain the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and the discharge superheat of compressor, then when evaporating saturation temperature and being less than preset value, control module is to the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and the discharge superheat of compressor judge, if the inlet superheat degree of fluid reservoir is more than or equal to first preset the degree of superheat, the return-air degree of superheat of compressor is more than or equal to second and presets the degree of superheat, and the discharge superheat of compressor is more than or equal to the 3rd default degree of superheat, then judge that air-conditioning system occurs to owe refrigerant situation, thus automatically can detect currently whether be in deficient refrigerant state timely and accurately, not only reminding user or maintenance personal can carry out system overhaul in time with coolant adding, system can also be facilitated automatically to carry out refrigerant adjustment, and testing cost is cheap, bring convenience to user.
According to one embodiment of present invention, described control module obtains the inlet superheat degree of described fluid reservoir according to following formula:
ACSH＝T6-Te，
Wherein, ACSH is the inlet superheat degree of described fluid reservoir, and T6 is the inlet temperature of described fluid reservoir, and Te is described evaporation saturation temperature.
According to one embodiment of present invention, described control module obtains the return-air degree of superheat of described compressor according to following formula:
SSH＝T7-Te，
Wherein, SSH is the return-air degree of superheat of described compressor, and T7 is the suction temperature of described compressor, and Te is described evaporation saturation temperature.
According to one embodiment of present invention, described control module obtains the discharge superheat of described compressor according to following formula:
DSH＝T71-Tc，
Wherein, DSH is the discharge superheat of described compressor, and T71 is the delivery temperature of described compressor, and Tc is exhaust saturation temperature corresponding to the pressure at expulsion of described compressor.
In an embodiment of the present invention, described air-conditioning system test running in a chiller mode.
Accompanying drawing explanation
Fig. 1 is the structural representation of air-conditioning system according to an embodiment of the invention; And
Fig. 2 is the flow chart of the deficient refrigerant detection method of air-conditioning system according to the embodiment of the present invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Deficient refrigerant detection method and the air-conditioning system of the air-conditioning system proposed according to the embodiment of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the structural representation of air-conditioning system according to an embodiment of the invention.As shown in Figure 1, this air-conditioning system comprises compressor 1, cross valve ST, outdoor heat exchanger 2, choke valve 3, indoor heat exchanger 4, fluid reservoir 5 and control module 6.
Wherein, first port of cross valve ST is connected with the exhaust outlet of compressor 1, one end of outdoor heat exchanger 2 is connected with second port of cross valve ST, one end of choke valve 3 is connected with the other end of outdoor heat exchanger 2, one end of indoor heat exchanger 4 is connected with the other end of choke valve 3, the other end of indoor heat exchanger 4 is connected with the 3rd port of cross valve ST, the entrance of fluid reservoir 5 is connected with the 4th port of cross valve ST, the outlet of fluid reservoir 5 is connected with the gas returning port of compressor 1, control module 6 is by detecting the back pressure of compressor 1 to obtain corresponding evaporation saturation temperature Te, and obtain the inlet superheat degree of fluid reservoir 5, the return-air degree of superheat of compressor 1 and the discharge superheat of compressor 1, and when evaporating saturation temperature Te and being less than preset value, if the inlet superheat degree of fluid reservoir 5 is more than or equal to first preset the degree of superheat, the return-air degree of superheat of compressor 1 is more than or equal to second and presets the degree of superheat, and the discharge superheat of compressor 1 is more than or equal to the 3rd default degree of superheat, control module 6 judges that air-conditioning system occurs to owe refrigerant situation.
As shown in Figure 1, in cooling mode, compressor 1 pressure high temperature hot gas is out by becoming high pressure Normal Atmospheric Temperature Liquid after outdoor heat exchanger 2 condensation, high pressure Normal Atmospheric Temperature Liquid becomes low-pressure low-temperature gas-liquid mixture after choke valve 3 such as electric expansion valve throttling, low-pressure low-temperature gas-liquid mixture becomes low-pressure low-temperature gas after absorbing heat through indoor heat exchanger 4, and then carrying out gas-liquid separation by fluid reservoir 5, the gas of final low-pressure low-temperature returns the gas returning port of compressor 1.And in a heating mode, outdoor heat exchanger 2 is evaporimeter, indoor heat exchanger 4 is condenser, and being commutated by cross valve ST makes overall path direction contrary.
In an embodiment of the present invention, it should be noted that, in order to ensure the accuracy that deficient refrigerant detects, needing the time of air-conditioning system outside the special runnings such as non-defrosting oil return operation to carry out judgement and detecting.Specifically, the back pressure of compressor is detected by back pressure sensor LP, wherein, back pressure sensor LP can be arranged on the porch of fluid reservoir 5, the evaporation saturation temperature Te that control module 6 is corresponding under obtaining back pressure, and the pressure at expulsion of compressor 1 is detected by the back pressure transducer HP being arranged on compressor 1 exhaust outlet, the exhaust saturation temperature Tc that control module 6 is corresponding under obtaining pressure at expulsion, then the temperature sensor by being arranged on fluid reservoir 5 porch detects the inlet temperature T6 of fluid reservoir, detect fluid reservoir by the temperature sensor be arranged between the outlet of fluid reservoir 5 and the gas returning port of compressor 1 and export suction temperature T7 into compressor, the delivery temperature T71 of compressor is detected by the temperature sensor being arranged on exhaust outlet of compressor, thus the inlet superheat degree ACSH of fluid reservoir can be calculated, the return-air degree of superheat SSH of compressor and the discharge superheat DSH of compressor.
Like this, control module 6 can obtain the inlet superheat degree of fluid reservoir according to following formula: ACSH=T6-Te, wherein, ACSH is the inlet superheat degree of described fluid reservoir, and T6 is the inlet temperature of described fluid reservoir, and Te is described evaporation saturation temperature.Further, control module 6 can obtain the return-air degree of superheat of described compressor according to following formula: SSH=T7-Te, and wherein, SSH is the return-air degree of superheat of described compressor, and T7 is the suction temperature of described compressor, and Te is described evaporation saturation temperature.And control module 6 can obtain the discharge superheat of described compressor according to following formula: DSH=T71-Tc, wherein, DSH is the discharge superheat of described compressor, and T71 is the delivery temperature of described compressor, and Tc is exhaust saturation temperature corresponding to the pressure at expulsion of described compressor.
Therefore, in an embodiment of the present invention, control module 6 is by judging promptly and accurately to detect whether air-conditioning system deficient refrigerant situation occurs to the evaporation saturation temperature Te of correspondence, inlet superheat degree ACSH, the return-air degree of superheat SSH of compressor of fluid reservoir and the discharge superheat DSH of compressor under back pressure, thus can reminding user or maintenance personal overhaul to fill refrigerant to system in time, solve the problem that air-conditioning system detects deficient refrigerant signal automatically, and can facilitate that system regulates automatically, remote monitoring and maintenance etc.
According to one embodiment of present invention, when detecting air-conditioning system and whether owing refrigerant, air-conditioning system is test running in a chiller mode, namely say, air-conditioning system is under test running in a chiller mode, when evaporating saturation temperature Te and being less than preset value A value, prove that air-conditioning system low pressure is too low, air-conditioning system takes out refrigerant difficulty, now the inlet superheat degree ACSH of fluid reservoir can be very large, such as be greater than first and preset degree of superheat B value, if the return-air degree of superheat SSH of compressor is also very large simultaneously, such as be greater than second and preset degree of superheat C value, then demonstrate in fluid reservoir be empty or in fluid reservoir refrigerant little.If the pressure at expulsion of compressor is low in this case, but delivery temperature is relatively high, the discharge superheat DSH namely showing as compressor is also very large, such as, be greater than the 3rd and preset degree of superheat D value, under then can judging the state that whole air-conditioning system is in deficient refrigerant thus.
In an embodiment of the present invention, air-conditioning system can be domestic air conditioner, also can be the commercial use air conditioners such as multiple on-line system.
In sum, according to the air-conditioning system of the embodiment of the present invention, control module is by detecting the back pressure of compressor to obtain corresponding evaporation saturation temperature, and obtain the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and the discharge superheat of compressor, then when evaporating saturation temperature and being less than preset value, control module is to the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and the discharge superheat of compressor judge, if the inlet superheat degree of fluid reservoir is more than or equal to first preset the degree of superheat, the return-air degree of superheat of compressor is more than or equal to second and presets the degree of superheat, and the discharge superheat of compressor is more than or equal to the 3rd default degree of superheat, then judge that air-conditioning system occurs to owe refrigerant situation, thus automatically can detect currently whether be in deficient refrigerant state timely and accurately, not only reminding user or maintenance personal can carry out system overhaul in time with coolant adding, system can also be facilitated automatically to carry out refrigerant adjustment, and testing cost is cheap, bring convenience to user.
Fig. 2 is the flow chart of the deficient refrigerant detection method of air-conditioning system according to the embodiment of the present invention.As shown in Figure 2, the deficient refrigerant detection method of this air-conditioning system comprises the following steps:
S1, detects the back pressure of compressor in air-conditioning system, and obtains corresponding evaporation saturation temperature Te according to the back pressure of compressor.
According to one embodiment of present invention, the back pressure of compressor is detected by back pressure sensor LP, wherein, back pressure sensor LP can be arranged on the porch of fluid reservoir, the evaporation saturation temperature Te that the back pressure like this by detecting compressor is corresponding under can obtaining back pressure.
S2, obtains the discharge superheat of the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and compressor in air-conditioning system.
Wherein, by being arranged on the back pressure transducer HP of exhaust outlet of compressor to detect the pressure at expulsion of compressor, thus exhaust saturation temperature Tc corresponding under acquisition pressure at expulsion, and the inlet temperature T6 of fluid reservoir is detected by the temperature sensor being arranged on fluid reservoir porch, and detect fluid reservoir by the temperature sensor be arranged between the outlet of fluid reservoir and the gas returning port of compressor and export suction temperature T7 into compressor, the delivery temperature T71 of compressor is detected by the temperature sensor being arranged on exhaust outlet of compressor.Like this, the inlet superheat degree of fluid reservoir can be obtained according to following formula: ACSH=T6-Te, wherein, ACSH is the inlet superheat degree of described fluid reservoir, and T6 is the inlet temperature of described fluid reservoir, and Te is described evaporation saturation temperature.And can obtain the return-air degree of superheat of described compressor according to following formula: SSH=T7-Te, wherein, SSH is the return-air degree of superheat of described compressor, and T7 is the suction temperature of described compressor, and Te is described evaporation saturation temperature.And the discharge superheat of described compressor can be obtained according to following formula: DSH=T71-Tc, wherein, DSH is the discharge superheat of described compressor, and T71 is the delivery temperature of described compressor, and Tc is exhaust saturation temperature corresponding to the pressure at expulsion of described compressor.
S3, when evaporating saturation temperature and being less than preset value, if the inlet superheat degree of fluid reservoir is more than or equal to, first presets the degree of superheat, the return-air degree of superheat of compressor is more than or equal to the second default degree of superheat and the discharge superheat of compressor is more than or equal to the 3rd default degree of superheat, then judge that air-conditioning system occurs to owe refrigerant situation.
According to one embodiment of present invention, when detecting air-conditioning system and whether owing refrigerant, air-conditioning system is test running in a chiller mode, namely say, air-conditioning system is under test running in a chiller mode, when evaporating saturation temperature Te and being less than preset value A value, prove that air-conditioning system low pressure is too low, air-conditioning system takes out refrigerant difficulty, now the inlet superheat degree ACSH of fluid reservoir can be very large, such as be greater than first and preset degree of superheat B value, if the return-air degree of superheat SSH of compressor is also very large simultaneously, such as be greater than second and preset degree of superheat C value, then demonstrate in fluid reservoir be empty or in fluid reservoir refrigerant little.If the pressure at expulsion of compressor is low in this case, but delivery temperature is relatively high, the discharge superheat DSH namely showing as compressor is also very large, such as, be greater than the 3rd and preset degree of superheat D value, under then can judging the state that whole air-conditioning system is in deficient refrigerant thus.
According to the deficient refrigerant detection method of the air-conditioning system of the embodiment of the present invention, first by detecting the back pressure of compressor to obtain corresponding evaporation saturation temperature, and obtain the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and the discharge superheat of compressor, then when evaporating saturation temperature and being less than preset value, to the inlet superheat degree of fluid reservoir, the return-air degree of superheat of compressor and the discharge superheat of compressor judge, if the inlet superheat degree of fluid reservoir is more than or equal to first preset the degree of superheat, the return-air degree of superheat of compressor is more than or equal to second and presets the degree of superheat, and the discharge superheat of compressor is more than or equal to the 3rd default degree of superheat, then judge that air-conditioning system occurs to owe refrigerant situation, thus automatically can detect that air-conditioning system is current timely and accurately and whether be in deficient refrigerant state, not only reminding user or maintenance personal can carry out system overhaul in time with coolant adding, system can also be facilitated automatically to carry out refrigerant adjustment, and testing cost is cheap, bring convenience to user.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. a deficient refrigerant detection method for air-conditioning system, is characterized in that, comprise the following steps:
Detect the back pressure of compressor in air-conditioning system, and obtain corresponding evaporation saturation temperature according to the back pressure of described compressor;
Obtain the discharge superheat of the inlet superheat degree of fluid reservoir in described air-conditioning system, the return-air degree of superheat of described compressor and described compressor;
When described evaporation saturation temperature is less than preset value, if the inlet superheat degree of described fluid reservoir is more than or equal to, first presets the degree of superheat, the return-air degree of superheat of described compressor is more than or equal to the second default degree of superheat and the discharge superheat of described compressor is more than or equal to the 3rd default degree of superheat, then judge that described air-conditioning system occurs to owe refrigerant situation.
2. the deficient refrigerant detection method of air-conditioning system according to claim 1, is characterized in that, obtains the inlet superheat degree of described fluid reservoir according to following formula:
ACSH＝T6-Te，
Wherein, ACSH is the inlet superheat degree of described fluid reservoir, and T6 is the inlet temperature of described fluid reservoir, and Te is described evaporation saturation temperature.
3. the deficient refrigerant detection method of air-conditioning system according to claim 1, is characterized in that, obtains the return-air degree of superheat of described compressor according to following formula:
SSH＝T7-Te，
Wherein, SSH is the return-air degree of superheat of described compressor, and T7 is the suction temperature of described compressor, and Te is described evaporation saturation temperature.
4. the deficient refrigerant detection method of air-conditioning system according to claim 1, is characterized in that, obtain the discharge superheat of described compressor according to following formula:
DSH＝T71-Tc，
Wherein, DSH is the discharge superheat of described compressor, and T71 is the delivery temperature of described compressor, and Tc is exhaust saturation temperature corresponding to the pressure at expulsion of described compressor.
5. the deficient refrigerant detection method of the air-conditioning system according to any one of claim 1-4, is characterized in that, the test running in a chiller mode of described air-conditioning system.
6. an air-conditioning system, is characterized in that, comprising:
Compressor;
Cross valve, the first port of described cross valve is connected with the exhaust outlet of compressor;
Outdoor heat exchanger, one end of described outdoor heat exchanger is connected with the second port of described cross valve;
Choke valve, one end of described choke valve is connected with the other end of described outdoor heat exchanger;
Indoor heat exchanger, one end of described indoor heat exchanger is connected with the other end of described choke valve, and the other end of described indoor heat exchanger is connected with the 3rd port of described cross valve;
Fluid reservoir, the entrance of described fluid reservoir is connected with the 4th port of described cross valve, and the outlet of described fluid reservoir is connected with the gas returning port of described compressor;
Control module, described control module is by detecting the back pressure of described compressor to obtain corresponding evaporation saturation temperature, and obtain the inlet superheat degree of described fluid reservoir, the return-air degree of superheat of described compressor and the discharge superheat of described compressor, and when described evaporation saturation temperature is less than preset value, if the inlet superheat degree of described fluid reservoir is more than or equal to first preset the degree of superheat, the return-air degree of superheat of described compressor is more than or equal to second and presets the degree of superheat, and the discharge superheat of described compressor is more than or equal to the 3rd default degree of superheat, described control module then judges that described air-conditioning system occurs to owe refrigerant situation.
7. air-conditioning system according to claim 6, is characterized in that, described control module obtains the inlet superheat degree of described fluid reservoir according to following formula:
ACSH＝T6-Te，
Wherein, ACSH is the inlet superheat degree of described fluid reservoir, and T6 is the inlet temperature of described fluid reservoir, and Te is described evaporation saturation temperature.
8. air-conditioning system according to claim 6, is characterized in that, described control module obtains the return-air degree of superheat of described compressor according to following formula:
SSH＝T7-Te，
Wherein, SSH is the return-air degree of superheat of described compressor, and T7 is the suction temperature of described compressor, and Te is described evaporation saturation temperature.
9. air-conditioning system according to claim 6, is characterized in that, described control module obtains the discharge superheat of described compressor according to following formula:
DSH＝T71-Tc，
Wherein, DSH is the discharge superheat of described compressor, and T71 is the delivery temperature of described compressor, and Tc is exhaust saturation temperature corresponding to the pressure at expulsion of described compressor.
10. the air-conditioning system according to any one of claim 6-9, is characterized in that, the test running in a chiller mode of described air-conditioning system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610012172.XA CN105485992B (en) | 2016-01-06 | 2016-01-06 | Air-conditioning system and its deficient refrigerant detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610012172.XA CN105485992B (en) | 2016-01-06 | 2016-01-06 | Air-conditioning system and its deficient refrigerant detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105485992A true CN105485992A (en) | 2016-04-13 |
| CN105485992B CN105485992B (en) | 2018-09-07 |
Family
ID=55673137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610012172.XA Active CN105485992B (en) | 2016-01-06 | 2016-01-06 | Air-conditioning system and its deficient refrigerant detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105485992B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106545973A (en) * | 2016-11-29 | 2017-03-29 | 广东美的暖通设备有限公司 | Multiple on-line system and its coolant quantity decision method |
| CN106765973A (en) * | 2017-01-03 | 2017-05-31 | 青岛海尔空调器有限总公司 | The control method and air-conditioning of a kind of lack of fluorine of air-conditioners detection |
| EP3396262A4 (en) * | 2016-11-17 | 2018-11-21 | GD Midea Heating & Ventilating Equipment Co., Ltd. | Anti-slugging control method and control apparatus for air-conditioning system, and air-conditioning system |
| CN108895733A (en) * | 2018-09-19 | 2018-11-27 | 广东美的暖通设备有限公司 | A kind of method and device of coolant injection |
| CN109708271A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method and its device of outer machine system in parallel |
| CN109708272A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method of the electric expansion valve of outer machine in parallel |
| CN112856716A (en) * | 2021-01-15 | 2021-05-28 | 广东美的暖通设备有限公司 | Air conditioning system and refrigerant state detection method and device thereof |
| CN114484919A (en) * | 2022-02-25 | 2022-05-13 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
| CN114963528A (en) * | 2021-06-29 | 2022-08-30 | 青岛海尔新能源电器有限公司 | Refrigerant detection method, device, equipment and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6330802B1 (en) * | 2000-02-22 | 2001-12-18 | Behr Climate Systems, Inc. | Refrigerant loss detection |
| CN201122034Y (en) * | 2007-11-28 | 2008-09-24 | 海尔集团公司 | Air conditioner circulating load control device and multi-gang air conditioner circulating load control device |
| JP2009192090A (en) * | 2008-02-12 | 2009-08-27 | Denso Corp | Refrigerating cycle device |
| CN102348940A (en) * | 2009-03-19 | 2012-02-08 | 大金工业株式会社 | Air conditioning device |
| CN103791588A (en) * | 2014-01-21 | 2014-05-14 | 宁波奥克斯电气有限公司 | Control method for solving problem of shortage of refrigerants of multi-link air conditioning unit |
| CN104676845A (en) * | 2015-03-26 | 2015-06-03 | 广东美的暖通设备有限公司 | Multi-split system and control method thereof |
-
2016
- 2016-01-06 CN CN201610012172.XA patent/CN105485992B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6330802B1 (en) * | 2000-02-22 | 2001-12-18 | Behr Climate Systems, Inc. | Refrigerant loss detection |
| CN201122034Y (en) * | 2007-11-28 | 2008-09-24 | 海尔集团公司 | Air conditioner circulating load control device and multi-gang air conditioner circulating load control device |
| JP2009192090A (en) * | 2008-02-12 | 2009-08-27 | Denso Corp | Refrigerating cycle device |
| CN102348940A (en) * | 2009-03-19 | 2012-02-08 | 大金工业株式会社 | Air conditioning device |
| CN103791588A (en) * | 2014-01-21 | 2014-05-14 | 宁波奥克斯电气有限公司 | Control method for solving problem of shortage of refrigerants of multi-link air conditioning unit |
| CN104676845A (en) * | 2015-03-26 | 2015-06-03 | 广东美的暖通设备有限公司 | Multi-split system and control method thereof |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3396262A4 (en) * | 2016-11-17 | 2018-11-21 | GD Midea Heating & Ventilating Equipment Co., Ltd. | Anti-slugging control method and control apparatus for air-conditioning system, and air-conditioning system |
| CN106545973B (en) * | 2016-11-29 | 2019-07-26 | 广东美的暖通设备有限公司 | Multi-line system and its coolant quantity determination method |
| CN106545973A (en) * | 2016-11-29 | 2017-03-29 | 广东美的暖通设备有限公司 | Multiple on-line system and its coolant quantity decision method |
| CN106765973A (en) * | 2017-01-03 | 2017-05-31 | 青岛海尔空调器有限总公司 | The control method and air-conditioning of a kind of lack of fluorine of air-conditioners detection |
| CN106765973B (en) * | 2017-01-03 | 2020-06-30 | 青岛海尔空调器有限总公司 | Control method for fluorine deficiency detection of air conditioner and air conditioner |
| CN108895733A (en) * | 2018-09-19 | 2018-11-27 | 广东美的暖通设备有限公司 | A kind of method and device of coolant injection |
| CN108895733B (en) * | 2018-09-19 | 2021-05-25 | 广东美的暖通设备有限公司 | Refrigerant filling method and device |
| CN109708272A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method of the electric expansion valve of outer machine in parallel |
| CN109708271A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | The control method and its device of outer machine system in parallel |
| CN112856716A (en) * | 2021-01-15 | 2021-05-28 | 广东美的暖通设备有限公司 | Air conditioning system and refrigerant state detection method and device thereof |
| CN114963528A (en) * | 2021-06-29 | 2022-08-30 | 青岛海尔新能源电器有限公司 | Refrigerant detection method, device, equipment and storage medium |
| CN114963528B (en) * | 2021-06-29 | 2023-08-18 | 青岛海尔新能源电器有限公司 | Refrigerant detection method, device, equipment and storage medium |
| CN114484919A (en) * | 2022-02-25 | 2022-05-13 | 珠海格力电器股份有限公司 | Air conditioning system and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105485992B (en) | 2018-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105485992A (en) | Air conditioning system and refrigerant shortage detecting method thereof | |
| EP3545241B1 (en) | A method for handling fault mitigation in a vapour compression system | |
| CN104819595B (en) | refrigeration system, control method and device and air conditioner | |
| US20090095000A1 (en) | Air conditioner | |
| CN112050299B (en) | Air conditioner | |
| CN105066539A (en) | Multiple-on-line system and electronic expansion valve control method thereof | |
| US20170328604A1 (en) | A method for operating a vapour compression system with a receiver | |
| CN104964343A (en) | Device and method for improving running reliability of compressor | |
| CN105674638A (en) | Gas-liquid separator, air-conditioning system and control method for preventing liquid returning of compressor | |
| JPH03186170A (en) | Refrigerating machine and refrigerant amount indicating method in refrigerating machine | |
| CN102365507B (en) | Refrigerator | |
| US20090260376A1 (en) | Air conditioner | |
| CN104048366A (en) | Air conditioner, outdoor unit of air conditioner, heating air supplementing method and refrigeration air supplementing method | |
| CN105299841A (en) | Multi-split air conditioning system and fault detection method of heat exchange valve bodies of outdoor heat exchanger of multi-split air conditioning system | |
| CN107044692B (en) | Multi-split air conditioning system and defrosting control method and device thereof | |
| CN102345949A (en) | Refrigerant flow regulating system of multi-connected air-conditioning heat exchanger and regulating method thereof | |
| WO2023051831A1 (en) | Air conditioner | |
| CN109579344A (en) | A kind of air-conditioning system and its control method that can prevent compressor liquid hammer | |
| CN103900300B (en) | Air-conditioner and control method thereof | |
| CN105299840A (en) | Multi-connected air conditioner system and fault detecting method of bypass valve of multi-connected air conditioner system | |
| CN110529974B (en) | Refrigerant leakage detection method and device for air conditioner and air conditioner | |
| CN101086359A (en) | Air conditioner and control method thereof | |
| JPH06201234A (en) | Air-conditioner | |
| JP7150135B2 (en) | refrigeration cycle equipment | |
| CN205718026U (en) | For the refrigeration system of refrigerator and the refrigerator with it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |