CN202902539U - Multi-split air conditioner system pressure parameter obtaining device - Google Patents
Multi-split air conditioner system pressure parameter obtaining device Download PDFInfo
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- CN202902539U CN202902539U CN 201220360575 CN201220360575U CN202902539U CN 202902539 U CN202902539 U CN 202902539U CN 201220360575 CN201220360575 CN 201220360575 CN 201220360575 U CN201220360575 U CN 201220360575U CN 202902539 U CN202902539 U CN 202902539U
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Abstract
The utility model discloses a multi-split air conditioner system pressure parameter obtaining device. The multi-split air conditioner system pressure parameter obtaining device comprises a temperature parameter measuring module, a saturation temperature parameter obtaining module and a pressure parameter obtaining module, wherein the temperature parameter measuring module is used for confirming the current operating state of a multi-split air conditioner system and measuring to obtain a corresponding temperature parameter under the current operating state, the saturation temperature parameter obtaining module is used for obtaining a saturation temperature parameter corresponding to the measured temperature parameter according to the measured temperature parameter and according to the corresponding relation between a preset saturation temperature parameter and a corresponding temperature parameter. The pressure parameter obtaining module is used for inquiring a pre-saved refrigerant physical property chart and obtaining a pressure parameter corresponding to the obtained saturation temperature parameter. By means of the multi-split air conditioner system pressure parameter obtaining device, the cost of the multi-split air conditioner system can be reduced.
Description
Technical field
The utility model relates to air conditioner controlling technology, relates in particular to a kind of device that obtains the multi-online air-conditioning system pressure parameter.
Background technology
Along with improving constantly of people's living standard, under inhabitation and office work environment, by device or the system of installing an air-conditioner, in order to promote the comfortableness of inhabitation and working environment, become the important selection that people improve the comfortableness demand.Wherein, the multi-gang air-conditioner technology since have control free, energy-efficient, be convenient to the advantage such as installation and maintenance, be an important directions of Air-conditioning Development.
Multi-online air-conditioning system generally comprises an off-premises station and one or more indoor set, in actual the use, can be according to the variation in outdoor environment temperature, air conditioning area and season, and actuating section or whole indoor sets.For example, when evening in winter, the late into the night and morning, start more indoor set and enter running status, and in the morning to the afternoon time period, can stop gradually the indoor set of some operations, because the load variations of multi-online air-conditioning system is larger, thereby, how ensureing the safe and reliable operation of multi-online air-conditioning system, avoid load variations to the impact of multi-online air-conditioning system, is a technical problem needing solution badly.
In the prior art, in order to ensure the safe and reliable operation of multi-online air-conditioning system, evaporating pressure parameter in the needs guarantee multi-online air-conditioning system and condensing pressure parameter (being referred to as pressure parameter) are in safe and reliable pressure limit, if the high pressure in the multi-online air-conditioning system is too high or too low, low pressure is too high or too low, to cause corresponding refrigerant too high or very few, thereby cause that press returns liquid, the problems such as system jams, like this, can be by detecting and obtain evaporating pressure and the condensing pressure in the multi-online air-conditioning system, understand the running status of indoor and outdoor machine, for the control multi-online air-conditioning system provides input parameter, regulate thereby carry out multi-online air-conditioning system by input parameter, guarantee that multi-online air-conditioning system moves in safe and reliable pressure limit.
The existing method of obtaining the multi-online air-conditioning system pressure parameter is on the suction and discharge pipeline that pressure sensor is arranged in multi-online air-conditioning system, to obtain pressure parameter.But the method need to increase the layout pressure sensor, so that the cost of multi-online air-conditioning system rises, thereby has reduced the market competitiveness of this multi-online air-conditioning system.
The utility model content
Embodiment of the present utility model provides a kind of device that obtains the multi-online air-conditioning system pressure parameter, reduces the multi-online air-conditioning system cost.
For achieving the above object, a kind of device that obtains the multi-online air-conditioning system pressure parameter that the utility model embodiment provides, this device comprises: temperature parameter measurement module, saturation temperature parameter acquisition module and pressure parameter acquisition module, wherein,
The temperature parameter measurement module, the current running status for determining multi-online air-conditioning system measures the relevant temperature parameter under this motion state;
The saturation temperature parameter acquisition module is used for by the saturation temperature parameter of in advance foundation and the corresponding relation of relevant temperature parameter, obtaining the saturation temperature parameter corresponding with this temperature parameter that measures according to the temperature parameter that measures;
The pressure parameter acquisition module is used for inquiring about pre-stored refrigerant physical property table, obtains the pressure parameter corresponding with resulting saturation temperature parameter.
Wherein, described device further comprises: the pressure parameter modular converter, be used for obtaining in advance pressure parameter and corresponding each temperature parameter under each running status of multi-online air-conditioning system, according to the pressure parameter that obtains, inquire about pre-stored refrigerant physical property table, obtain saturation temperature parameter corresponding to this pressure parameter; Corresponding relation building module is used for carrying out statistical analysis according to the saturation temperature parameter and each temperature parameter that obtain, sets up respectively the saturation temperature parameter obtained under each running status and the corresponding relation of relevant temperature parameter.
Described corresponding relation building module comprises: refrigeration pressure at expulsion saturation temperature parameter corresponding relation is set up unit, refrigeration pressure of inspiration(Pi) saturation temperature parameter corresponding relation and is set up the unit, heats pressure at expulsion saturation temperature parameter corresponding relation and set up the unit and heat pressure of inspiration(Pi) saturation temperature parameter corresponding relation and set up the unit, wherein
Refrigeration pressure at expulsion saturation temperature parameter corresponding relation is set up the unit, is used for according to outdoor heat converter liquid side temperature parameter and outdoor environment temperature parameter, sets up the corresponding relation with refrigeration pressure at expulsion saturation temperature parameter;
Refrigeration pressure of inspiration(Pi) saturation temperature parameter corresponding relation is set up the unit, is used for the minimum of a value parameter according to coiler temperature in the operation office for train receiving departure, sets up the corresponding relation with refrigeration pressure of inspiration(Pi) saturation temperature parameter;
Heat pressure at expulsion saturation temperature parameter corresponding relation and set up the unit, be used for the minimum of a value parameter of coiler temperature in the maximum parameter of maximum parameter, running indoor set leaving air temp according to coiler temperature in the operation office for train receiving departure and the operation office for train receiving departure, set up and the corresponding relation that heats pressure at expulsion saturation temperature parameter;
Heat pressure of inspiration(Pi) saturation temperature parameter corresponding relation and set up the unit, be used for according to outdoor heat converter liquid side temperature parameter, set up and the corresponding relation that heats pressure of inspiration(Pi) saturation temperature parameter.
Further comprise:
Saturation temperature parameter correcting module is used for according to the control implementation condition that sets in advance, and after the saturation temperature parameter that the saturation temperature parameter acquisition module is obtained is revised, exports the pressure parameter acquisition module to.
As seen from the above technical solution, a kind of device that obtains the multi-online air-conditioning system pressure parameter that the utility model embodiment provides, this device comprises: temperature parameter measurement module, saturation temperature parameter acquisition module and pressure parameter acquisition module, wherein, the temperature parameter measurement module, be used for determining the current running status of multi-online air-conditioning system, measure the relevant temperature parameter under this motion state; The saturation temperature parameter acquisition module is used for by the saturation temperature parameter of in advance foundation and the corresponding relation of relevant temperature parameter, obtaining the saturation temperature parameter corresponding with this temperature parameter that measures according to the temperature parameter that measures; The pressure parameter acquisition module is used for inquiring about pre-stored refrigerant physical property table, obtains the pressure parameter corresponding with resulting saturation temperature parameter.Like this, correspond to the saturation temperature parameter by the temperature parameter that will measure, by saturation temperature coaptation pressure parameter, need not in multi-online air-conditioning system, to arrange pressure sensor, thereby reduced the multi-online air-conditioning system cost again.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art.Apparently, the accompanying drawing in below describing only is embodiment more of the present utility model, for those of ordinary skills, can also obtain according to these accompanying drawing illustrated embodiments other embodiment and accompanying drawing thereof.
Fig. 1 is the outdoor unit structure schematic diagram in the multi-online air-conditioning system of the utility model embodiment.
Fig. 2 is the method flow schematic diagram that the utility model embodiment obtains the multi-online air-conditioning system pressure parameter.
Fig. 3 is the apparatus structure schematic diagram that the utility model embodiment obtains the multi-online air-conditioning system pressure parameter.
The specific embodiment
Below with reference to accompanying drawing the technical scheme of each embodiment of the utility model is carried out clear, complete description, obviously, described embodiment only is a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are resulting all other embodiment under the prerequisite of not making creative work, all belong to the scope that the utility model is protected.
The existing method of obtaining the multi-online air-conditioning system pressure parameter is on the suction and discharge pipeline that pressure sensor is arranged in multi-online air-conditioning system, to obtain corresponding pressure parameter, so that the cost of multi-online air-conditioning system rises.
Among the utility model embodiment, consider in the existing multi-online air-conditioning system, in order to monitor its running status, when obtaining corresponding pressure parameter by pressure sensor, also on each corresponding components and parts of multi-online air-conditioning system, be furnished with corresponding temperature sensor, in order to gather the temperature parameter of multi-online air-conditioning system, know the physical parameter of refrigerant in the multi-online air-conditioning system according to the temperature parameter that gathers, thereby obtain the regulating effect of multi-online air-conditioning system.And in the practical application, under identical working environment, the pressure parameter of multi-online air-conditioning system is impact and the control that is subjected to temperature parameter, it is the height that the height of multi-online air-conditioning system temperature parameter has determined pressure parameter, for example, when steam is in dynamic balance state, the temperature that has when being saturation state is saturation temperature, pressure corresponding to this saturation temperature is saturation pressure, the corresponding saturation pressure parameter of saturation temperature parameter, for various refrigerant, prior art has provided corresponding refrigerant physical property table, compare in order to the saturation pressure parameter value in the refrigerant physical property table under the pressure parameter value that will measure and this environment, thereby determine whether refrigerant is qualified.Thereby, among the utility model embodiment, consider if the corresponding temperature parameter of multi-online air-conditioning system can be mapped as the saturation temperature parameter of refrigerant, then can be according to pre-stored refrigerant physical property table, obtain the saturation pressure corresponding to saturation temperature of this mapping, like this, just can need not in multi-online air-conditioning system, to arrange pressure sensor.
Consider based on above-mentioned analysis, among the utility model embodiment, test by experiment in advance the pressure parameter and corresponding each temperature parameter that obtain multi-online air-conditioning system, according to the pressure parameter that obtains, inquire about pre-stored refrigerant physical property table, obtain saturation temperature corresponding to this pressure parameter that obtains, then, according to this saturation temperature and corresponding each temperature parameter of obtaining, carry out statistical analysis, set up the corresponding relation of this saturation temperature and relevant temperature parameter.Like this, in follow-up flow process, as long as by the existing temperature sensor that is arranged in the multi-online air-conditioning system, obtain corresponding temperature parameter, according to the corresponding relation of setting up in advance, calculate by temperature parameter, can obtain saturation temperature corresponding to this temperature parameter in the multi-online air-conditioning system, and according to refrigerant physical property table, inquiry obtains pressure parameter corresponding to this corresponding saturation temperature, thereby in subsequent treatment, can take the necessary measures, realize the control to pressure parameter, thereby need not in multi-online air-conditioning system, to arrange pressure sensor, and in the control that realizes without the basis of pressure sensor pressure parameter, finally when not affecting air-conditioning control, realize the reduction of multi-online air-conditioning system cost.
Fig. 1 is the outdoor unit structure schematic diagram in the multi-online air-conditioning system of the utility model embodiment.Referring to Fig. 1; this multi-online air-conditioning system comprises: the compressor 1 that the system dynamic source is provided; the heat exchanger 2 that heat exchange is used; the systemic circulation coolant quantity is regulated the electric expansion valve 3 of usefulness; the gas-liquid separator 4 of liquid storage function is provided during the system underrun; the filter 5 that impurity screening is used; mean allocation enters the refrigerant fluid diverter 6 of heat exchanger 2; be used for the detection tabs 7 that the in-house system commodity inspection is used; the high-low pressure bypass; the capillary 8 that cooperates magnetic valve to use; with electric-opening or close the magnetic valve 9 of refrigerant loop; be installed on the gas exhaust piping; prevent that system pressure is too high; the first pressure switch 10 and the second pressure switch 11 with the protection system reliability; be used for switching on or off the first stop valve 12 and second stop valve 13 in refrigerant loop; guarantee check valve 14 and cross valve 15 that refrigerant can only flow in a direction; wherein
Among the utility model embodiment, the running status of multi-online air-conditioning system comprises: refrigerating operaton state and heating operation state.
Evaporating pressure parameter and condensing pressure parameter are respectively the pressure parameter of compressor 1 suction and discharge side, comprise pressure at expulsion parameter and pressure of inspiration(Pi) parameter, the corresponding pressure at expulsion saturation temperature parameter of difference and pressure of inspiration(Pi) saturation temperature parameter, wherein, the pressure at expulsion parameter comprises refrigeration pressure at expulsion parameter P
dAnd heat pressure at expulsion parameter P '
d, the pressure of inspiration(Pi) parameter comprises refrigeration pressure of inspiration(Pi) parameter P
sAnd heat pressure of inspiration(Pi) parameter P '
s, accordingly, pressure at expulsion saturation temperature parameter comprises refrigeration pressure at expulsion saturation temperature parameter T
1And heat pressure at expulsion saturation temperature parameter T '
1, pressure of inspiration(Pi) saturation temperature parameter comprises refrigeration pressure of inspiration(Pi) saturation temperature parameter T
2And heat pressure of inspiration(Pi) saturation temperature parameter T '
2
Fig. 2 is the method flow schematic diagram that the utility model embodiment obtains the multi-online air-conditioning system pressure parameter.Referring to Fig. 2, this flow process comprises:
In this step, as previously mentioned, the running status of multi-online air-conditioning system comprises: refrigerating operaton state and heating operation state.Wherein,
Pressure parameter under the refrigerating operaton state comprises: refrigeration pressure at expulsion parameter and refrigeration pressure of inspiration(Pi) parameter; Wherein, refrigeration pressure at expulsion parameter P
dCorresponding saturation temperature is refrigeration pressure at expulsion saturation temperature parameter T
1, refrigeration pressure of inspiration(Pi) parameter P
sCorresponding saturation temperature is refrigeration pressure of inspiration(Pi) saturation temperature parameter T
2
Pressure parameter under the heating operation state comprises: heat the pressure at expulsion parameter and heat the pressure of inspiration(Pi) parameter.Wherein, heat pressure at expulsion parameter P '
dCorresponding saturation temperature is for heating pressure at expulsion saturation temperature parameter T '
1, heat pressure of inspiration(Pi) parameter P '
sCorresponding saturation temperature is for heating pressure of inspiration(Pi) saturation temperature parameter T '
2
Among the utility model embodiment, for the refrigerating operaton state, in each temperature parameter, except outdoor heat converter liquid side temperature, outside the interior coiler temperature of outdoor environment temperature and operation office for train receiving departure, other temperature parameter all is the off-premises station internal component, in the kind of refrigeration cycle process, because outdoor heat converter liquid side temperature and outdoor environment temperature cause, thereby, in order to reduce the task amount of statistical analysis, consideration is with its coefficient by way of compensation, with outdoor heat converter liquid side temperature, the coiler temperature is mapped as respectively the pressure at expulsion saturation temperature parameter corresponding with pressure at expulsion in outdoor environment temperature and the operation office for train receiving departure, and, the pressure of inspiration(Pi) saturation temperature parameter corresponding with pressure of inspiration(Pi), and set up the corresponding relation of Suck and exhaust pressure saturation temperature parameter and pressure parameter.
Like this, under the refrigerating operaton state, temperature parameter comprises: the minimum of a value parameter of coiler temperature in outdoor heat converter liquid side temperature parameter, outdoor environment temperature and the operation office for train receiving departure.If current running status is the refrigerating operaton state, the relevant temperature parameter under this motion state is respectively the minimum of a value parameter of coiler temperature in outdoor heat converter liquid side temperature parameter, outdoor environment temperature parameter and the operation office for train receiving departure.Wherein, outdoor heat converter liquid side temperature parameter and outdoor environment temperature parameter and refrigeration pressure at expulsion saturation temperature parameter correlation, the minimum of a value parameter of coiler temperature and refrigeration pressure of inspiration(Pi) saturation temperature parameter correlation in the operation office for train receiving departure.
For the heating operation state, in each temperature parameter, similar with aforementioned analysis, consider that temperature parameter comprises: the maximum parameter of the maximum parameter of coiler temperature, running indoor set leaving air temp, minimum of a value parameter and the outdoor heat converter liquid side temperature parameter of the interior coiler temperature of operation office for train receiving departure in the operation office for train receiving departure.Like this, if current running status is the heating operation state, the relevant temperature parameter under this motion state is respectively the maximum parameter of coiler temperature in the operation office for train receiving departure, the maximum parameter of running indoor set leaving air temp, minimum of a value parameter and the outdoor heat converter liquid side temperature parameter of the interior coiler temperature of operation office for train receiving departure.Wherein, in the operation office for train receiving departure in the maximum parameter of the maximum parameter of coiler temperature, running indoor set leaving air temp, the operation office for train receiving departure minimum of a value parameter of coiler temperature with heat pressure at expulsion saturation temperature parameter correlation, outdoor heat converter liquid side temperature parameter with heat pressure of inspiration(Pi) saturation temperature parameter correlation.
Relevant temperature parameter under this motion state measures by the respective temperature sensor of arranging.
In the practical application, the current running status determining multi-online air-conditioning system measures before the relevant temperature parameter under this motion state, and the method can further include:
Step 200a obtains pressure parameter and corresponding each temperature parameter under each running status of multi-online air-conditioning system in advance, according to the pressure parameter that obtains, inquires about pre-stored refrigerant physical property table, obtains saturation temperature parameter corresponding to this pressure parameter;
In this step, before pressure parameter under obtaining each running status of multi-online air-conditioning system and corresponding each temperature parameter, on the corresponding components and parts of multi-online air-conditioning system, arrange corresponding temperature sensor and pressure sensor, then, multi-online air-conditioning system is moved in the refrigerating operaton state, regulate multi-online air-conditioning system, make it be in different cryogenic temperature ranks, in different cryogenic temperature ranks, obtain temperature parameter by temperature sensor respectively, obtain corresponding pressure parameter by pressure sensor; Then, multi-online air-conditioning system is switched to the heating operation state, regulate multi-online air-conditioning system, make it be in the different temperature ranks that heat, different heating in the temperature rank, obtain temperature parameter by temperature sensor respectively, obtain corresponding pressure parameter by pressure sensor.
Among the utility model embodiment, about refrigerant physical property table, specifically can referring to the correlation technique document, not repeat them here.
Step 200b according to the saturation temperature parameter of obtaining and each temperature parameter, carries out statistical analysis, sets up respectively the saturation temperature parameter obtained under each running status and the corresponding relation of relevant temperature parameter;
In this step, with each temperature parameter that obtains under the saturation temperature parameter of obtaining under the same running status and this running status, by statistical analysis, set up the corresponding relation of this saturation temperature parameter and relevant temperature parameter, each temperature parameter that is about to measure is mapped as saturation temperature parameter corresponding to pressure parameter that measures.
Among the utility model embodiment, saturation temperature parameter under the refrigerating operaton state and the corresponding relation of relevant temperature parameter comprise: the corresponding relation figure of the mapping table of saturation temperature parameter and relevant temperature parameter, saturation temperature parameter and relevant temperature parameter and, the approximate formula of saturation temperature parameter and relevant temperature parameter etc.Certainly, in the practical application, also can adopt alternate manner to represent the corresponding relation of saturation temperature parameter and relevant temperature parameter, for example, adopt the mode of Excel.
Wherein, the approximate formula of saturation temperature parameter and relevant temperature parameter can comprise again: the approximate formula of outdoor heat converter liquid side temperature parameter and outdoor environment temperature parameter and refrigeration pressure at expulsion saturation temperature parameter, and, the approximate formula of the minimum of a value parameter of coiler temperature and refrigeration pressure of inspiration(Pi) saturation temperature parameter in the operation office for train receiving departure.Among the utility model embodiment, preferably, under the refrigerating operaton state (cross valve 15 among Fig. 1 is in closed condition), pass through the statistical analysis to each temperature parameter that obtains, the saturation temperature parameter that obtains and the approximate formula of relevant temperature parameter are:
T
1=T
e+a
1-0.05x(T
a-35)+b （1）
T
2=T
1-min-c
1 （2）
In the formula,
a
1For the cold-patch of crossing under the refrigerating operaton state is repaid coefficient;
B is the refrigerant penalty coefficient under the refrigerating operaton state;
c
1Be the pressure loss penalty coefficient under the refrigerating operaton state or overheated penalty coefficient;
T
eBe outdoor heat converter liquid side temperature parameter;
T
aBe the outdoor environment temperature parameter;
T
1-minMinimum of a value parameter for coiler temperature in the operation office for train receiving departure under the refrigerating operaton state;
T
1Be refrigeration pressure at expulsion saturation temperature parameter, T
1〉=0;
T
2Be refrigeration pressure of inspiration(Pi) saturation temperature parameter.
Wherein, a
1, b, c
1Can obtain by experiment, relevant with the multi-online air-conditioning system running status, under same running status, can think to be a constant; T
a, T
e, T
1-minCan obtain by temperature sensor.
The approximate formula of saturation temperature parameter and relevant temperature parameter comprises: the maximum parameter of the maximum parameter of coiler temperature, running indoor set leaving air temp and the minimum of a value parameter and the approximate formula that heats pressure at expulsion saturation temperature parameter of the interior coiler temperature of operation office for train receiving departure in the operation office for train receiving departure, and, outdoor heat converter liquid side temperature parameter and the approximate formula that heats pressure of inspiration(Pi) saturation temperature parameter.
Under the heating operation state (cross valve 15 among Fig. 1 is in conducting state), pass through the statistical analysis to each temperature parameter that obtains, the saturation temperature parameter that obtains and the approximate formula of relevant temperature parameter are:
T′
1=Max(T′
1_max+a
2，T
o_max+d，T
1_min_off) （3）
T′
2=T
e-c
2 （4）
In the formula,
a
2For the cold-patch of crossing under the heating operation state is repaid coefficient;
c
2Be the pressure loss penalty coefficient under the heating operation state;
D is the heat transfer temperature difference penalty coefficient under the heating operation state;
T '
1_maxMaximum parameter for coiler temperature in the operation office for train receiving departure under the heating operation state;
T
O_maxMaximum parameter for the running indoor set leaving air temp under the heating operation state;
T
1_min_offMinimum of a value parameter for coiler temperature in the operation office for train receiving departure under the heating operation state;
T '
1For heating pressure at expulsion saturation temperature parameter;
T '
2For heating pressure of inspiration(Pi) saturation temperature parameter.
Wherein, with aforementioned similar, a
2, c
2, d can obtain by experiment, is a constant; T '
1_max, T
O_maxAnd T
1_min_offCan obtain by temperature sensor.
Institute's step 201 that it should be noted that and step 202 needs are carried out once, and the corresponding relation of foundation goes for each multi-online air-conditioning system under the corresponding running status, and need not all to carry out when obtaining the multi-online air-conditioning system pressure parameter at every turn.
Step 202 according to the temperature parameter that measures, by the saturation temperature parameter of in advance foundation and the corresponding relation of relevant temperature parameter, obtains the saturation temperature parameter corresponding with this temperature parameter that measures;
In this step, according to the saturation temperature parameter of obtaining under each running status of setting up and the corresponding relation of relevant temperature parameter, inquiry obtains the saturation temperature parameter corresponding with the temperature parameter that measures, for example, the above-mentioned computing formula of temperature parameter substitution (1)～(4) that will obtain by temperature sensor, be mapped as Suck and exhaust pressure saturation temperature corresponding to Suck and exhaust pressure, specifically
If be the refrigerating operaton state, the saturation temperature parameter comprises refrigeration pressure at expulsion saturation temperature parameter T
1And refrigeration pressure of inspiration(Pi) saturation temperature parameter T
2, wherein,
In outdoor heat converter liquid side temperature parameter, outdoor environment temperature parameter substitution formula (1), pressure at expulsion saturation temperature parameter can obtain freezing;
In the minimum of a value parameter substitution formula (2) with coiler temperature in the operation office for train receiving departure, pressure of inspiration(Pi) saturation temperature parameter can obtain freezing.
If be the refrigerating operaton state, the saturation temperature parameter comprises and heats pressure at expulsion saturation temperature parameter T '
1And heat pressure of inspiration(Pi) saturation temperature parameter T '
2, wherein,
In the minimum of a value parameter substitution formula (3) with coiler temperature in the maximum parameter of the maximum parameter of coiler temperature in the operation office for train receiving departure, running indoor set leaving air temp, the operation office for train receiving departure, can obtain heating pressure at expulsion saturation temperature parameter;
In outdoor heat converter liquid side temperature parameter substitution formula (4), can obtain heating pressure of inspiration(Pi) saturation temperature parameter.
Step 203 is inquired about pre-stored refrigerant physical property table, obtains the pressure parameter corresponding with resulting saturation temperature parameter.
In this step, after calculating saturation temperature parameter corresponding to temperature parameter, corresponding relation according to pressure parameter and saturation temperature parameter in the refrigerant physical property table, the pressure parameter in the corresponding refrigerant physical property of the saturation temperature parameter table that calculates is obtained in inquiry, thereby in the control of follow-up realization to pressure.Namely obtain Suck and exhaust pressure saturation temperature parameter by computing formula, according to Suck and exhaust pressure saturation temperature parameter, the refrigerant physical property table that inquiry is obtained in advance can obtain corresponding Suck and exhaust pressure parameter.
In the practical application, when if the control of multi-online air-conditioning system stable operation is moved with pressure switch, for example, setting according to multi-online air-conditioning system, after arriving certain exhaust pressure value, control is moved with pressure switch, so that multi-online air-conditioning system can carry out FREQUENCY CONTROL according to exhaust pressure value, to satisfy system's control.That is to say, if control is moved with pressure switch, belong to system's astable operation state, system's actual exhaust air pressure is higher, and be based on the Systems balanth running status by the pressure at expulsion that above-mentioned formula to calculating goes out, therefore, when being in the astable operation state in system, need to revise the pressure at expulsion parameter.Like this, for the exhaust pressure value deviation that prevents from calculating the exhaust pressure value that obtains and system's reality larger, according to the control implementation condition, calculate the pressure at expulsion modification of the parameters, thereby, preferably, after obtaining saturation temperature corresponding to this temperature parameter that measures, before pre-stored refrigerant physical property table, the method can further include:
According to the control implementation condition that sets in advance, the saturation temperature parameter that measures is revised.
In this step, the control implementation condition can be set according to the working control demand of multi-online air-conditioning system.
Correction formula is as follows:
T=T
1+ Δ T, or
T′=T′
1+ΔT
ΔT=58-T
on
In the formula,
T, T ' are revised saturation temperature parameter;
Δ T is for revising temperature, Δ T≤10;
T
OnPressure at expulsion saturation temperature when moving (from closing to conducting) for control with pressure switch.
Like this, according to revised saturation temperature, the refrigerant physical property table that inquiry is obtained in advance can obtain the real-time ventilation pressure parameter value in the system, thereby according to the pressure at expulsion parameter value, regulates the refrigerant influx of indoor set, can implement to control more accurately.
By as seen above-mentioned, the utility model embodiment obtains the method for multi-online air-conditioning system pressure parameter, by refrigerant physical property table, obtain the saturation temperature parameter corresponding to pressure parameter of measurement, and set up in advance corresponding relation with the relevant temperature parameter according to this saturation temperature parameter, when needs obtain the multi-online air-conditioning system pressure parameter, measure the relevant temperature parameter, and according to the corresponding relation of setting up in advance, the relevant temperature parameter that measures is corresponded to the saturation temperature parameter, thereby by inquiry refrigerant physical property table, obtain pressure parameter corresponding to saturation temperature parameter that this measures.Like this, correspond to the saturation temperature parameter by the temperature parameter that will measure, again by saturation temperature coaptation pressure, to realize the control to pressure, need not in multi-online air-conditioning system, to arrange pressure sensor, reduced the multi-online air-conditioning system cost; Further, by the most basic in the multi-online air-conditioning system, temperature parameter comes controlled pressure the most intuitively, from user perspective, more meets the requirement of air conditioning comfortableness.
Fig. 3 is the apparatus structure schematic diagram that the utility model embodiment obtains the multi-online air-conditioning system pressure parameter.Referring to Fig. 3, this device comprises: temperature parameter measurement module, saturation temperature parameter acquisition module and pressure parameter acquisition module, wherein,
The temperature parameter measurement module, the current running status for determining multi-online air-conditioning system measures the relevant temperature parameter under this motion state;
The saturation temperature parameter acquisition module is used for by the saturation temperature parameter of in advance foundation and the corresponding relation of relevant temperature parameter, obtaining saturation temperature parameter corresponding to this temperature parameter that measures according to the temperature parameter that measures;
The pressure parameter acquisition module is used for inquiring about pre-stored refrigerant physical property table, obtains pressure parameter corresponding to saturation temperature parameter that this measures.
Preferably, this device may further include:
The pressure parameter modular converter, be used for obtaining in advance pressure parameter and corresponding each temperature parameter under each running status of multi-online air-conditioning system, according to the pressure parameter that obtains, inquire about pre-stored refrigerant physical property table, obtain saturation temperature parameter corresponding to this pressure parameter;
Corresponding relation building module is used for carrying out statistical analysis according to the saturation temperature parameter and each temperature parameter that obtain, sets up respectively the saturation temperature parameter obtained under each running status and the corresponding relation of relevant temperature parameter;
Among the utility model embodiment, corresponding relation building module comprises: refrigeration pressure at expulsion saturation temperature parameter corresponding relation is set up unit, refrigeration pressure of inspiration(Pi) saturation temperature parameter corresponding relation and is set up the unit, heats pressure at expulsion saturation temperature parameter corresponding relation and set up the unit and heat pressure of inspiration(Pi) saturation temperature parameter corresponding relation and set up the unit (not shown), wherein
Refrigeration pressure at expulsion saturation temperature parameter corresponding relation is set up the unit, is used for according to outdoor heat converter liquid side temperature parameter and outdoor environment temperature parameter, sets up the corresponding relation with refrigeration pressure at expulsion saturation temperature parameter;
Refrigeration pressure of inspiration(Pi) saturation temperature parameter corresponding relation is set up the unit, is used for the minimum of a value parameter according to coiler temperature in the operation office for train receiving departure, sets up the corresponding relation with refrigeration pressure of inspiration(Pi) saturation temperature parameter;
Heat pressure at expulsion saturation temperature parameter corresponding relation and set up the unit, be used for the minimum of a value parameter of coiler temperature in the maximum parameter of maximum parameter, running indoor set leaving air temp according to coiler temperature in the operation office for train receiving departure and the operation office for train receiving departure, set up and the corresponding relation that heats pressure at expulsion saturation temperature parameter;
Heat pressure of inspiration(Pi) saturation temperature parameter corresponding relation and set up the unit, be used for according to outdoor heat converter liquid side temperature parameter, set up and the corresponding relation that heats pressure of inspiration(Pi) saturation temperature parameter.
Preferably, this device can further include:
Saturation temperature parameter correcting module is used for according to the control implementation condition that sets in advance, and after the saturation temperature parameter that the saturation temperature parameter acquisition module is obtained is revised, exports the pressure parameter acquisition module to.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technologies thereof, then the utility model also comprises these changes and modification interior.
Claims (4)
1. a device that obtains the multi-online air-conditioning system pressure parameter is characterized in that, this device comprises: temperature parameter measurement module, saturation temperature parameter acquisition module and pressure parameter acquisition module, wherein,
The temperature parameter measurement module, the current running status for determining multi-online air-conditioning system measures the relevant temperature parameter under this running status;
The saturation temperature parameter acquisition module is used for by the saturation temperature parameter of in advance foundation and the corresponding relation of relevant temperature parameter, obtaining the saturation temperature parameter corresponding with this temperature parameter that measures according to the temperature parameter that measures;
The pressure parameter acquisition module is used for inquiring about pre-stored refrigerant physical property table, obtains the pressure parameter corresponding with resulting saturation temperature parameter.
2. device according to claim 1 is characterized in that, further comprises:
The pressure parameter modular converter, be used for obtaining in advance pressure parameter and corresponding each temperature parameter under each running status of multi-online air-conditioning system, according to the pressure parameter that obtains, inquire about pre-stored refrigerant physical property table, obtain saturation temperature parameter corresponding to this pressure parameter;
Corresponding relation building module is used for carrying out statistical analysis according to the saturation temperature parameter and each temperature parameter that obtain, sets up respectively the saturation temperature parameter obtained under each running status and the corresponding relation of relevant temperature parameter.
3. device according to claim 2, it is characterized in that, described corresponding relation building module comprises: refrigeration pressure at expulsion saturation temperature parameter corresponding relation is set up unit, refrigeration pressure of inspiration(Pi) saturation temperature parameter corresponding relation and is set up the unit, heats pressure at expulsion saturation temperature parameter corresponding relation and set up the unit and heat pressure of inspiration(Pi) saturation temperature parameter corresponding relation and set up the unit, wherein
Refrigeration pressure at expulsion saturation temperature parameter corresponding relation is set up the unit, is used for according to outdoor heat converter liquid side temperature parameter and outdoor environment temperature parameter, sets up the corresponding relation with refrigeration pressure at expulsion saturation temperature parameter;
Refrigeration pressure of inspiration(Pi) saturation temperature parameter corresponding relation is set up the unit, is used for the minimum of a value parameter according to coiler temperature in the operation office for train receiving departure, sets up the corresponding relation with refrigeration pressure of inspiration(Pi) saturation temperature parameter;
Heat pressure at expulsion saturation temperature parameter corresponding relation and set up the unit, be used for the minimum of a value parameter of coiler temperature in the maximum parameter of maximum parameter, running indoor set leaving air temp according to coiler temperature in the operation office for train receiving departure and the operation office for train receiving departure, set up and the corresponding relation that heats pressure at expulsion saturation temperature parameter;
Heat pressure of inspiration(Pi) saturation temperature parameter corresponding relation and set up the unit, be used for according to outdoor heat converter liquid side temperature parameter, set up and the corresponding relation that heats pressure of inspiration(Pi) saturation temperature parameter.
4. according to claim 2 or 3 described devices, it is characterized in that, further comprise:
Saturation temperature parameter correcting module is used for according to the control implementation condition that sets in advance, and after the saturation temperature parameter that the saturation temperature parameter acquisition module is obtained is revised, exports the pressure parameter acquisition module to.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778006A (en) * | 2012-07-24 | 2012-11-14 | 青岛海信日立空调系统有限公司 | Method and device for acquiring pressure parameter of multi-connected air-conditioning system |
| CN106247676A (en) * | 2016-08-16 | 2016-12-21 | 广东美的暖通设备有限公司 | The control method of air-conditioner, control device and air-conditioner |
| CN110146318A (en) * | 2019-05-28 | 2019-08-20 | 格力电器（武汉）有限公司 | Solve the low method of air-conditioning entropy detection pressure testing power |
| CN110207332A (en) * | 2019-06-11 | 2019-09-06 | 珠海格力电器股份有限公司 | The pressure detection method and air conditioner of air conditioner |
| CN110332742A (en) * | 2019-07-08 | 2019-10-15 | 广东Tcl智能暖通设备有限公司 | Hot water apparatus and heat pump system control method, heat pump system control device |
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2012
- 2012-07-24 CN CN 201220360575 patent/CN202902539U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778006A (en) * | 2012-07-24 | 2012-11-14 | 青岛海信日立空调系统有限公司 | Method and device for acquiring pressure parameter of multi-connected air-conditioning system |
| CN106247676A (en) * | 2016-08-16 | 2016-12-21 | 广东美的暖通设备有限公司 | The control method of air-conditioner, control device and air-conditioner |
| CN106247676B (en) * | 2016-08-16 | 2019-03-29 | 广东美的暖通设备有限公司 | Control method, control device and the air conditioner of air conditioner |
| CN110146318A (en) * | 2019-05-28 | 2019-08-20 | 格力电器（武汉）有限公司 | Solve the low method of air-conditioning entropy detection pressure testing power |
| CN110207332A (en) * | 2019-06-11 | 2019-09-06 | 珠海格力电器股份有限公司 | The pressure detection method and air conditioner of air conditioner |
| CN110332742A (en) * | 2019-07-08 | 2019-10-15 | 广东Tcl智能暖通设备有限公司 | Hot water apparatus and heat pump system control method, heat pump system control device |
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