CN1219670A - Heating control apparatus of air conditioner and method thereof - Google Patents

Heating control apparatus of air conditioner and method thereof Download PDF

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Publication number
CN1219670A
CN1219670A CN98123003A CN98123003A CN1219670A CN 1219670 A CN1219670 A CN 1219670A CN 98123003 A CN98123003 A CN 98123003A CN 98123003 A CN98123003 A CN 98123003A CN 1219670 A CN1219670 A CN 1219670A
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China
Prior art keywords
indoor unit
indoor
cold
obsolete
producing medium
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Pending
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CN98123003A
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Chinese (zh)
Inventor
具亨谟
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Samsung Electronics Co Ltd
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Samsung Electronics Co Ltd
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Publication of CN1219670A publication Critical patent/CN1219670A/en
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    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • 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
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • 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
    • F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
    • F25B2341/06—Details of flow restrictors or expansion valves
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2513—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21174—Temperatures of an evaporator of the refrigerant at the inlet of the evaporator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2117—Temperatures of an evaporator
    • F25B2700/21175—Temperatures of an evaporator of the refrigerant at the outlet of the evaporator

Abstract

A heating control apparatus of air conditioner, the air conditioner has multiple indoor units and outdoor units. The apparatus includes: multiple power transmission expansion valve for controlling the distribution of the refrigerant in the indoor unit based on the running condition in the indoor unit; a temperature detecting device for detecting the temperature at the inlet and outlet of the indoor heat exchanger of unused indoor unit during the heating process; a control device for controlling the power transmission expansion valve in the unused indoor unit when the temperature between the inlet and outlet of the unused indoor unit is exceeding a predetermined temperature difference to prevent the refrigerant left in the unused indoor unit. The thermal efficiency of the air conditioner is improved.

Description

The heating control apparatus of air-conditioning and method thereof
The present invention relates to a kind of heat pump type multiple-unit air-conditioning (heat pump type multi-airconditioner) (hereinafter referred to as air-conditioning), has indoor unit more than two, be connected to an outdoor unit, be used for a plurality of rooms are carried out air conditioning, relate in particular to a kind of heating control apparatus and method thereof of air-conditioning, add thermal capacity by in the heating running, preventing that cold-producing medium from remaining in the obsolete indoor heat converter, improving.
In general, air-conditioning can constitute according to function or unit and classifies.According to its function, air-conditioning can be used for refrigeration, refrigeration and dehumidifying or refrigeration and heating.Constitute according to the unit, air-conditioning can be divided into two classes, i.e. monoblock type and split type.In integral air conditioner, refrigeration and heating function are by integrated, and air-conditioning quilt is installed in places such as window, and split-type air conditioner is designed to respectively at indoor placement refrigerating plant with at outdoor placement firing equipment and compressor.
The split-type air conditioner of this spline structure also comprises a kind of multi-type air conditioner, is designed to a plurality of indoor units are linked an outdoor unit, effectively a plurality of houses are freezed.
This multi-type air conditioner as shown in Figure 1, comprises a plurality of indoor units 10,11,12, is installed in indoor; With an outdoor unit 20, be installed in outdoor.They are all as a system, for the heating of needs or refrigerating operaton and be operated.
Outdoor unit 20 comprises compressor 30, is used for cold-producing medium is compressed into the gaseous refrigerant of HTHP; Main power delivery expansion valve 40 is used for controlling cold degree by the temperature of control from the gaseous refrigerant of compressor 30 dischargings in the refrigerating operaton process, the overheated degree of control in the heating running; Four way valve door 50 is used for the service condition (refrigeration or heating) according to air-conditioning, and conversion is in the flow direction of the high temperature and high pressure gaseous refrigerant of compressor compresses; Outdoor heat converter 60 is used at refrigerating operaton the high temperature and high pressure gaseous refrigerant that is compressed being condensed into the liquid refrigerant of normal temperature high voltage; Outdoor fan 61 is used for sucking from the external world air and is used for outdoor air is blown into outdoor heat converter 60, thereby realizes effective heat exchange; Each room A, the power delivery expansion valve 70,71 of B and C, 72, be used for closing or opening, with according to each indoor unit 10 by the control device (not shown), the distribution and the flow direction of 11,12 service condition control cold-producing medium are used for optionally these rooms being carried out air conditioning.At this moment, the liquid refrigerant of normal temperature high voltage is expanded to the cold-producing medium of the frosting of low-temp low-pressure.
Indoor unit 10,11,12 have indoor heat exchanger 80,81,82, are used for cold-producing medium when the frosting of low-temp low-pressure by room A, B, the power delivery expansion valve of C 70,71,72 o'clock is with its evaporation, so that become the low-temperature low-pressure refrigerant of complete gaseous state.Indoor unit also comprises indoor fan 90,91,92, is indoor heat converter 80,81, and space air is blown in 82 available heat exchange.
In the air-conditioning of this spline structure, if room A, B, the indoor unit 10,11,12 of C form the circulating ring of the cold-producing medium of refrigerating operaton along the solid arrow of Fig. 1 in refrigerating operaton, and wherein four way valve door 50 disconnects.
At first, if gaseous refrigerant from the HTHP of compressor at outdoor unit 20, import (induce) outdoor heat converter 60 by main power delivery expansion valve 40 and four way valve door 50, the gaseous refrigerant of HTHP forces heat exchange in outdoor heat converter 60 usefulness by the air that outdoor fan 61 blows, and is used for refrigeration and condensation.
Liquid refrigerant at the normal temperature high voltage of outdoor heat converter 60 condensations, according to indoor unit 10,11,12 service condition is assigned to indoor unit 10,11,12, then by room A, B, the power delivery expansion valve 70 of C, 71,72 import, and forbid that here cold-producing medium flows into any obsolete indoor unit.In power delivery expansion valve 70,71,72, liquid cold-producing medium is expanded to the cold-producing medium of the frosting of low-temp low-pressure, so that evaporation easily.
Then, the cold-producing medium of the frosting of low-temp low-pressure pass through a plurality of pipes, thereby be evaporated.At this moment, the cold-producing medium utilization is by indoor fan 90,91, and 92 air that blow are at indoor heat converter 80,81, and room air freezes at 82 places.Cooled air is discharged into indoor, to carry out refrigerating operaton.At indoor heat converter 80,81, the cold-producing medium of the gaseous state of the low-temp low-pressure of 82 refrigeration is imported into compressor 30 by four way valve door 50 simultaneously.Then, by the adiabatic compression of compressor 30, cold-producing medium is become the gaseous refrigerant of HTHP.
Cold-producing medium circulating ring for refrigerating operaton is repeated as mentioned above.At this moment, main power delivery expansion valve 40 is according to indoor unit 10,11, and 12 service condition is controlled overheated degree, and room A, B, the power delivery expansion valve 70 of C, 71,72 assignment system cryogens forbid that to the indoor unit of operation cold-producing medium flows into obsolete indoor unit.
On the other hand, if room A, B, the indoor unit 10,11,12 of C is in service in heating, and four way valve door 50 is connected, and forms the circulating ring of the cold-producing medium of refrigerating operaton along the arrow dotted line of Fig. 1.If gaseous refrigerant from the HTHP of compressor 30 at outdoor unit 20, by main power delivery expansion valve 40 and four way valve door 50, at indoor unit 10,11,12 import indoor heat converter 80,81,82, by indoor fan 90,91,92 air that blow are the cold-producing medium of normal temperature high voltage by the water of normal temperature or air heat exchange with the refrigeration.Then, the air of heating (hot-air) is at indoor unit 10,11, and 12 are discharged into indoorly, are used for the heating operation.
At indoor heat converter 80,81, the cold-producing medium of 82 liquefaction is according to the service condition of indoor unit, be assigned to indoor unit, import room A, B, the power delivery expansion valve 70,71,72 of C, power delivery expansion valve 70,71,72 forbid flow of refrigerant, so that it is expanded to the cold-producing medium of the frosting of low-temp low-pressure, so that evaporation and it is imported outdoor heat converter 60.
Correspondingly, the cold-producing medium of the frosting of low-temp low-pressure, air heat exchange and refrigeration that usefulness places the outdoor fan 61 of outdoor heat converter 60 to blow.By four way valve door 50, be imported into compressor 30, at the cold-producing medium of the gaseous state of the low-temp low-pressure of outdoor heat converter 60 refrigeration so that utilize adiabatic compression to become the gaseous refrigerant of HTHP.This cold-producing medium circulating ring is repeated as mentioned above.
At this moment, main power delivery expansion valve 40 is according to indoor unit 10,11, and 12 service condition was controlled cold degree, and room A, B, the power delivery expansion valve 70 of C, 71,72 assignment system cryogens forbid that to the indoor unit of operation cold-producing medium flows into obsolete indoor unit.
Yet, since in service in heating, the power delivery expansion valve 70,71 of obsolete indoor unit, 72 close, and cold-producing medium can be retained in the indoor heat converter 80,81 of obsolete indoor unit, 82, thereby make lack of refrigerant, reduced the efficient of heating operation.Thus, a problem of traditional multi-type air conditioner is, indoor unit 10,11, and 12 the thermal capacity that adds does not reach.
Even propose heating power transmission expansion valve, be installed in heat exchanger 80,81 respectively, 82 inlet, the use of many power delivery expansion valves has increased its manufacturing cost, has brought such as reducing competitiveness of product and reducing more problems in space owing to the installation of valve.
Proposing the present invention is in order to solve the above problems.An object of the present invention is to provide a kind of heating control apparatus and method thereof of air-conditioning, if confirm between the entrance and exit of each indoor heat converter, to occur surpassing predetermined temperature difference, then close one section predetermined amount of time of power delivery expansion valve, thereby in the heating running, by preventing that cold-producing medium from staying in the obsolete indoor heat converter, improved the thermal capacity that adds of air-conditioning.
In order to realize purpose of the present invention, a kind of heating control apparatus of air-conditioning is provided, this air-conditioning has a plurality of indoor units to link to each other with an outdoor unit, is used to heat a plurality of rooms, and this device comprises:
A plurality of power delivery expansion valves are used for the service condition according to indoor unit, the distribution of the cold-producing medium of control indoor unit;
Temperature detection device is used for surveying the temperature of entrance and exit of the indoor heat converter of obsolete indoor unit at the heating running;
Control device is used for controlling the power delivery expansion valve of obsolete indoor unit when the temperature difference between the entrance and exit of obsolete indoor unit surpasses predetermined temperature difference, stays in the obsolete indoor unit to prevent cold-producing medium.
A kind of method for heating and controlling of air-conditioning, this air-conditioning have a plurality of indoor units to link to each other with an outdoor unit, are used to heat a plurality of rooms, and this method may further comprise the steps:
Judge whether that these indoor units are in running status simultaneously;
When service condition was opened when the power delivery expansion valve of indoor unit of operation is according to indoor unit, control flowed into the amount of cold-producing medium of the indoor unit of operation;
If at back, indoor unit is not set in service condition simultaneously, judges with control device whether the temperature difference between the entrance and exit of indoor heat converter of obsolete indoor unit has surpassed predetermined temperature difference;
If the temperature difference between the entrance and exit of indoor heat converter has surpassed predetermined temperature difference, open by the power delivery expansion valve that makes obsolete indoor unit is predetermined, prevent that cold-producing medium from staying obsolete indoor heat converter; With
Passed through preset time if keep the power delivery expansion valve of obsolete indoor unit to open,, forbidden that cold-producing medium flows into obsolete indoor unit by turn-offing the power delivery expansion valve of obsolete indoor unit.
For complete understanding essence of the present invention and purpose, can reference should be made to the following detailed description taken in connection with the accompanying drawings, in the accompanying drawing:
Fig. 1 is the cold-producing medium circulating ring of traditional air-conditioning;
Fig. 2 is the cold-producing medium circulating ring according to air-conditioning of the present invention;
Fig. 3 is the block diagram of explanation according to the heating control apparatus of air-conditioning of the present invention;
Fig. 4 illustrates air-conditioning according to the present invention in the operating running status of heating; With
Fig. 5 a and 5b are the flow chart of explanation according to the method for heating and controlling of air-conditioning of the present invention.
With reference to the accompanying drawings, describe a preferred embodiment of the present invention in detail.Fig. 2 illustrates cold-producing medium circulation of the present invention.For the purpose of simplifying the description and explain that similar label is used to specify similar or equal parts and part with symbol, has omitted unnecessary quoting.
As shown in Figure 2, each room indoor unit 10,11,12 comprise: inlet temperature sensor 110 separately, 111,112, be used to survey indoor heat converter 80,81, the temperature of 82 inlet, in the heating running of air-conditioning, this temperature is according to importing indoor heat converter 80, the amount of 81,82 cold-producing medium and changing; Outlet temperature sensor 100,101,102 separately is used to survey indoor heat converter 80,81, the temperature of 82 outlet, this temperature is comply with indoor heat converter 80,81,82 the discharging cold-producing mediums amount and change.
As shown in Figure 3, electric supply installation 150 is predetermined DC voltage to the commercial ac power voltage transitions from the power supply of AC-powered end (not shown).Operation device 152 has comprised a plurality of function keys, be used for all operational modes (automatically, refrigeration, dehumidifying, blowing, heating etc.), be used for exhaust air rate (high wind, weak wind, gentle breeze etc.), the intended room temperature that is used to want is (hereinafter referred to as intended room temperature: Ts) and be used to import that operation of air conditioner begins or the operated key of stop signal.
Control device 154 is microcomputers, is used to the DC voltage initialization air-conditioning of self-power supply device 150, and controls the whole service of air-conditioning according to the run signal that operation device 152 is sent here.Control device 154 according to the temperature of surveying at its entrance and exit, is controlled room A in the heating running of air-conditioning, B, and the operation of the power delivery expansion valve of C is stayed obsolete indoor unit 80,81,82 to prevent cold-producing medium.
Room temperature sniffer 156 is surveyed the temperature (Tr) of the space air that sucks indoor unit 10,11,12, so that by adjusting to the room temperature (Ts) of being scheduled to operation device 152, carries out the refrigeration and the heating operation of air-conditioning.Inlet tube temperature detection device 158 comprises inlet temperature sensor 110,111,112, is used to survey indoor heat converter 80,81,82 inlet tube temperature is in the heating running, this temperature changes according to the amount of the cold-producing medium that imports indoor heat converter 80,81,82.
In addition, outlet temperature detection device 160 comprises outlet temperature sensor 100,101,102, be used to survey indoor heat converter 80,81,82 outlet temperature is in the heating running, this temperature is comply with indoor heat converter 80,81,82 the discharging cold-producing mediums amount and change.
The operation of air flow control device 162 control air flow motors 163, the direction of the air that the control vertically and flatly of this air flow motor 163 is discharged, so that by indoor heat converter 80,81, the air of 82 heat exchanges can be spread to whole room reposefully.
The operation of the control signal control compressor 30 of compressor drive apparatus 164 usefulness control device 154 (when described signal produces according to the room temperature of setting with operation device 152 (Ts) with by the difference between the room temperature of room temperature sniffer 156 detections).The control signal that outdoor fan motor drive unit 166 usefulness are sent here from control device 154 is controlled the speed of outdoor fan motor, be used for drive chamber's external fan 61 to blow the air in outdoor heat converter 60 heat exchanges, described signal is produced according to the difference between the room temperature (Tr) of predetermined room temperature (Ts) and detection.
Indoor fan motor drive unit 168 is used for from the speed of the control signal control indoor fan motor of controlling device 154, be used for drive chamber's internal fan 90,91,92 to blow at indoor heat converter 80,81, the air of 82 heat exchanges, described signal produces according to operation device 152 predefined air capacities.
Power delivery expansion valve drive unit 170 is used for from the control signal control power delivery expansion valve 70 of controlling device 154,71,72 operation, with according to indoor unit 10,11,12 service condition control imports indoor heat converter 80,81, the amount of 82 cold-producing medium, described service condition is set by operation device 152.
In addition, four way valve door drive 172 is used for from the operation of the control signal control four way valve door 50 of controlling device 154, and the service condition (refrigeration or heating) to set according to operation device 152 changes flowing of cold-producing medium.Display unit 174 illustrates the running status of air-conditioning, comprises the operation preference pattern (refrigeration, dehumidifying, blowing, heating etc. automatically) that operation device 152 is set.
Be described in detail the method for the heating control apparatus of this spline structure below.Fig. 5 a and 5b be explanation according to the running of the heating control apparatus of air-conditioning of the present invention and the flow chart of effect, wherein S represents each step.At first, when powering up to air-conditioning, the commercial ac voltage that electric supply installation 150 provides the Alternating Current Power Supply end is converted to and drives the required predetermined direct current voltage of air-conditioning, then it is outputed to corresponding driving circuit and control device 154.
At step S1, the DC voltage of exporting from electric supply installation 150 is received by control device 154, is used for the operation of initialization air-conditioning.At this moment, the user starts the operation of air-conditioning, for required operational mode is selected operated key, to set room temperature (Ts) and required air capacity, selects signal and operation commencing signal thereby send operation here from operation device 152.
At step S2, control device 154 judges whether that operation device 152 sends run signal here.If run signal is not sent (situation that is "No") here, air-conditioning keeps the operation holding state, carries out then reruning of step S2.
As the judged result of step S2, if operation device 152 is sent run signal (being the situation of "Yes") here, flow process walks to S3, and control device 154 judges whether that air-conditioning is set in the heating operation down therein.If under the heating operation (being the situation of "No"), flow process does not walk to step S31 for it, wherein realize the refrigeration and the dehumidifying operation of air-conditioning.Then, flow process is returned step S3, carries out then reruning of step S3.
Judged result as step S3, if air-conditioning is set in heating operation (being the situation of "Yes"), at step S4, control device 154 is given four way valve door drive 172 and power delivery expansion valve drive unit 170 four way valve door 50 and power delivery expansion valve 70 with the indoor unit of control operation with control signal, 71,72, so that carry out the heating operation of air-conditioning.
Thereby, four way valve door drive 172 and power delivery expansion valve drive unit 170 are closed four way valve door 50 and power delivery expansion valve 70 respectively, 71,72, thereby along the dotted arrow circulating refrigerant among Fig. 4, i.e. the indoor heat converter 80 of compressor 30 → main power delivery expansion valve 40 → four way valve door 50 → operation indoor unit, 81,82 → power delivery expansion valve 70,71,72 → outdoor heat converter, 60 → four way valve door, 50 → compressor 30.
Then, at step S5, control device 154 judges whether that intended room temperature (Ts) is higher than the room temperature (Tr) of detection.Do not survey room temperature (Tr) (being the situation of "No") if intended room temperature (Ts) is not higher than, air-conditioning keeps the operation holding state, carries out then reruning of step S5.
Judged result as step S5, if being higher than, intended room temperature (Ts) surveys room temperature (Tr) (being the situation of "Yes"), flow process walks to step S6, control device 154 is according to the difference between intended room temperature (Ts) and the detection room temperature (Tr), give compressor drive apparatus 164 and outdoor fan motor drive unit 166 with control signal, be used for after the speed of the running frequency of judging compressor 30 and outdoor fan 61, respectively drive compression machine 30 and outdoor fan 61.
Thereby compressor drive apparatus 164 is connected compressor according to the running frequency of the compressor of determining at control device 154, and outdoor fan motor drive unit 166 is connected outdoor fan 61 according to the speed of the outdoor fan of determining at control device 154 61 simultaneously.
At step S7, if inlet tube temperature detection device 158 is surveyed the indoor heat converter 80 of the indoor unit of operation, 81,82 inlet tube temperature (Tip) is heated by the operation circulation time of compressor 30 when cold-producing medium, control device 154 receives the analogue data of the inlet tube temperature of being surveyed by inlet tube temperature detection device 158 (Tip), to be converted into numerical data, to judge whether that inlet tube temperature (Tip) surpasses predetermined temperature (T1: preheat the pipe temperature, when heating the beginning of operation, discharge about 27 ℃ to prevent cold air).
As the judged result of step S7, if inlet tube temperature (Tip) does not surpass predetermined temperature (T1) (being the situation of "No"), confirm that then inlet tube temperature (Tip) is in the state of cold air in the drain chamber, carry out then reruning of step S7.Then, if if inlet tube temperature (Tip) surpasses predetermined temperature (T1) (being the situation of "Yes"), flow process walks to step S8, control device 154 is given indoor fan motor drive unit 168 with control signal, be used to drive the indoor fan 90,91,92 of the indoor unit of operation.
Correspondingly, indoor fan motor drive unit 168 is according to predetermined air mass flow, and the speed of control indoor fan motor is to connect the indoor fan 90,91,92 of the indoor unit that moves.
If the indoor fan of the indoor unit of operation 90,91,92 is connected, at step S9, import the indoor heat converter 80,81,82 of the indoor unit that moves by main power delivery expansion valve 40 and four way valve door 50 from the gaseous refrigerant of the HTHP of compressor 30 discharging of outdoor unit 20.Then, by indoor fan 90,91,92 air that blow are at indoor heat converter 80,81,82 cold water or air heat exchange by normal temperature.Because cold-producing medium becomes the liquid refrigerant of normal temperature high voltage, the air of heating enters indoor, thereby realizes the heating operation of the indoor unit of operation.
At indoor heat converter 80,81, the cold-producing medium of 82 liquefaction, according to indoor unit 10,11,12 service condition is distributed and importing room A B, the power delivery expansion valve 70,71,72 of C.Then, cold-producing medium loses pressure, is expanded to the cold-producing medium of the frosting of low-temp low-pressure, in order to evaporation, thereby is imported into outdoor heat converter 60.
Air heat exchange and refrigeration that the cold-producing medium of the frosting of low-temp low-pressure is blown by outdoor fan 61 at outdoor heat converter 60 import compressor 30 by four way valve door 50.Then, cold-producing medium utilizes adiabatic compression to become the gaseous refrigerant of HTHP at compressor 30, thereby forms the circulating ring of repetition along the dotted arrow among Fig. 2.At this moment, main power delivery expansion valve 40 is according to indoor unit 10,11,12 service condition, the indoor unit 10 of control operation, 11,12 cold excessively degree, and power delivery expansion valve 70,71,72 are assigned to the indoor unit of operation with cold-producing medium, forbid that perhaps cold-producing medium imports obsolete indoor unit.
In the heating running,, judge whether that three rooms are in running status simultaneously at step S10.If three rooms are not to be in running status (being the situation of "No") simultaneously, flow process walks to step S11, survey obsolete indoor heat converter 80 with inlet tube temperature detection device 158 and outlet temperature detection device 160,81, the temperature of 82 entrance and exit, thereby control device 154 calculates the temperature difference (Δ T) at the entrance and exit of the indoor heat converter 80,81,82 of obsolete indoor unit.
Correspondingly, at step S12, control device 154 judges whether that the temperature difference of calculating (Δ T) surpasses predetermined temperature (T2: cold-producing medium is retained in the state of temperature of indoor unit, about 3 ℃).If temperature difference (Δ T), is then confirmed cold-producing medium above predetermined temperature (T2) (being the situation of "No") and is not stayed in the indoor heat converter 80,81,82 of obsolete indoor unit.Thereby flow process walks to step S13, and control device 154 allows power delivery expansion valve drive unit 170 to turn-off the power delivery expansion valve 70,71,72 of obsolete indoor unit.
At step S14, judge whether to give control device 154 1 stop signals from operation device 152 because operated key turn-offs.If do not give control device 154 these stop signals (being the situation of "No"), flow process is returned step S10, carries out then reruning of step S10.
As the judged result of step S14, if input stop signal (being the situation of "Yes"), flow process walks to step S15, compressor 30, four way valve door 50, outdoor fan 61 and the indoor fan 90 of the indoor unit that control device 154 is out of service, 91,92, thus the heating of finishing air-conditioning moves.
On the other hand, as the judged result of step S10, if three rooms are in running status (being the situation of "Yes") simultaneously, flow process walks to step S20, surveys indoor heat converter 80,81 with inlet tube temperature detection device 158 and outlet temperature detection device 160, the temperature of 82 entrance and exit, thereby control device 154 room A, B, the power delivery expansion valve 70 of C, 71,72 controls flow into the amount of the cold-producing medium of each indoor unit 10,11,12.From the temperature of the gaseous refrigerant of compressor 30 discharging by control device 154 controls, to control cold degree.Then, flow process walks to step S14, carries out then reruning of step S14.
In addition, judged result as step S12, if temperature difference (Δ T) surpasses predetermined temperature (T2) (being the situation of "Yes"), the affirmation cold-producing medium is stayed the indoor heat converter 80 of obsolete indoor unit, 81, in 82, thereby flow process walks to step S21, and control device 154 allows power delivery expansion valve drive unit 170 to connect the power delivery expansion valve 70 of obsolete indoor unit, 71,72 (steps 100) as shown in Figure 4, thereby are removed the indoor heat converter 80 of staying obsolete indoor unit, cold-producing medium in 81,82.
Correspondingly, at step S22, control device 154 adds up to the power delivery expansion valve 70 of obsolete indoor unit, 71,72 keep the time of connection, time of judge adding up to whether surpassed the scheduled time (remove obsolete indoor unit time of cold-producing medium of reservation of heat exchanger, about 10 seconds), if preset time does not have to surpass (being the situation of "No"), flow process walks to step S21, continues aggregate power transmission expansion valve 70,71,72 keep the time of connection, carry out then reruning of step S21.
Judged result as step S22, if preset time has surpassed (being the situation of "Yes"), flow process walks to step S23, control device 154 allows power delivery expansion valve drive unit 170 to turn-off the power delivery expansion valve 70 of obsolete indoor unit, 71,72 (steps 100), flow process are returned step S11, carry out then reruning of step S11.
As mentioned above, the advantage of heating control apparatus of the present invention and method thereof is, if Indoor Thermal is handed over The temperature difference of parallel operation entrance and exit surpasses predetermined temperature difference, and the power delivery of obsolete indoor unit is swollen Swollen valve keeps connecting one period scheduled time, is retained in this indoor heat converter to prevent cold-producing medium, thereby Improved the efficiency of heating surface of air-conditioning.

Claims (5)

1. the heating control apparatus of an air-conditioning, this air-conditioning has a plurality of indoor units to link to each other with an outdoor unit, is used to heat a plurality of rooms, and this device comprises:
A plurality of power delivery expansion valves are used for the service condition according to indoor unit, control the distribution of the cold-producing medium of described indoor unit;
Temperature detection device is used for surveying the temperature of entrance and exit of the indoor heat converter of obsolete indoor unit at the heating running; With
Control device, be used for when the temperature difference between the entrance and exit of described obsolete indoor unit surpasses predetermined temperature difference, control the power delivery expansion valve of described obsolete indoor unit, stay in the described obsolete indoor unit to prevent described cold-producing medium.
2. device as claimed in claim 1, wherein said control device make that the described power delivery expansion valve of described obsolete indoor unit is predetermined to be opened, and stay described cold-producing medium in the described indoor heat converter with removal.
3. device as claimed in claim 1, wherein said control device make the described power delivery expansion valve of described obsolete indoor unit open one period scheduled time, stay described cold-producing medium in the described indoor heat converter with removal.
4. the method for heating and controlling of an air-conditioning, this air-conditioning has a plurality of indoor units to link to each other with an outdoor unit, is used to heat a plurality of rooms, and this method may further comprise the steps:
Judge whether that these indoor units are in running status simultaneously;
After service condition was opened when the power delivery expansion valve of indoor unit of operation is according to the indoor unit of described operation, control flowed into the amount of cold-producing medium of the indoor unit of described operation;
If at back, described indoor unit is not set in described while service condition, judges with described control device whether the temperature difference between the entrance and exit of indoor heat converter of obsolete indoor unit has surpassed predetermined temperature difference;
If the temperature difference between the entrance and exit of described indoor heat converter has surpassed predetermined temperature difference, power delivery expansion valve by making described obsolete indoor unit is predetermined to be opened, and prevents that described cold-producing medium from staying described obsolete indoor heat converter; With
Passed through preset time if keep the power delivery expansion valve of described obsolete indoor unit to open,, forbidden that described cold-producing medium flows into described obsolete indoor unit by turn-offing the power delivery expansion valve of described obsolete indoor unit.
5. method as claimed in claim 4, wherein said judgement running status comprises with the step of the air of regulating a plurality of rooms: described cold-producing medium is assigned to the indoor unit of described operation and utilizes the amount of the cold-producing medium that the power delivery expansion valve control of the indoor unit of described operation imports.
CN98123003A 1997-11-28 1998-11-27 Heating control apparatus of air conditioner and method thereof Pending CN1219670A (en)

Applications Claiming Priority (2)

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KR63928/97 1997-11-28
KR1019970063928A KR19990042964A (en) 1997-11-28 1997-11-28 Heating controller and method of air conditioner

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CN1219670A true CN1219670A (en) 1999-06-16

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Cited By (2)

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CN101889175A (en) * 2007-12-04 2010-11-17 庆东网络株式会社 Method for controlling heating system
CN104272033A (en) * 2011-11-30 2015-01-07 三星电子株式会社 Air conditioner

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KR101130810B1 (en) 2011-10-14 2012-03-28 주식회사 우아한형제들 System for providing of receiving alarm and method for the same
CN105318420B (en) * 2014-06-25 2018-06-05 广东美的暖通设备有限公司 The control method of air-conditioning system and air-conditioning system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101889175A (en) * 2007-12-04 2010-11-17 庆东网络株式会社 Method for controlling heating system
CN101889175B (en) * 2007-12-04 2014-04-30 庆东元株式会社 Method for controlling heating system
CN104272033A (en) * 2011-11-30 2015-01-07 三星电子株式会社 Air conditioner
CN104272033B (en) * 2011-11-30 2017-06-06 三星电子株式会社 Air-conditioning

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TW362147B (en) 1999-06-21
KR19990042964A (en) 1999-06-15

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