CN1576730A - Multi-unit type air conditioning equipment and control method thereof - Google Patents
Multi-unit type air conditioning equipment and control method thereof Download PDFInfo
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- CN1576730A CN1576730A CNA2003101179720A CN200310117972A CN1576730A CN 1576730 A CN1576730 A CN 1576730A CN A2003101179720 A CNA2003101179720 A CN A2003101179720A CN 200310117972 A CN200310117972 A CN 200310117972A CN 1576730 A CN1576730 A CN 1576730A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005057 refrigeration Methods 0.000 claims abstract description 71
- 239000003507 refrigerant Substances 0.000 claims abstract description 50
- 238000010438 heat treatment Methods 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 description 11
- 239000007788 liquid Substances 0.000 description 7
- 210000004055 fourth ventricle Anatomy 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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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
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/26—Disposition of valves, e.g. of on-off valves or flow control valves of fluid flow reversing valves
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2507—Flow-diverting valves
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a multi-unit air-conditioning equipment comprising one or two outdoor units and a plurality of indoor units executing refrigeration operation and heating operation simultaneously and a method of controlling multi-unit air-conditioning equipments, wherein adequate refrigerant is supplied to indoor units under refrigeration mode so that refrigeration capacity of the indoor units under refrigeration mode is reinforced. An electric expansion valve is provided with a mutual pipeline through which refrigerant flows into the outdoor heat exchanger from the indoor heat exchanger to control the quantity of refrigerant flowing into the heat exchangers of the indoor units under refrigeration mode from the heat exchangers of the indoor units under heating mode. Meanwhile, the opening ratio of the electric expansion valve is controlled according to outdoor air temperature during simultaneous execution of refrigeration operation and heating operation. Therefore, though the outdoor air temperature changes or the refrigerant pipeline between the outdoor unit and the indoor units is longer, adequate refrigerant is supplied to the indoor units under refrigeration mode so that refrigeration capacity of the indoor units under refrigeration mode is reinforced.
Description
Cross
The application requires the priority of korean patent application No.2003-42327, and application No.2003-42327 submitted in Korea S Department of Intellectual Property on June 27th, 2003, and its disclosure content is included as reference herein fully.
Technical field
Present invention relates in general to a kind of multiple-unit formula air-conditioning equipment, relate in particular to this multiple-unit formula air-conditioning equipment, this air-conditioning equipment is provided with one or more outdoor units and two or more indoor units and this air-conditioning equipment and so operates, be that each indoor unit is operated under refrigeration and heating mode simultaneously, the invention still further relates to the method for control multiple-unit formula air-conditioning equipment.
Background technology
Disclosed a kind of multiple-unit formula air-conditioning equipment in Japanese publication No.6-317360, this air-conditioning equipment is so operated, and promptly its each indoor unit is carried out refrigeration and heating mode simultaneously.
As shown in Figure 1, this multiple-unit formula air-conditioning equipment comprises outdoor unit 1, the first indoor unit 6a, the second indoor unit 6b, the first branch units 20a and the second branch units 20b.Outdoor unit 1 has positive displacement compressor 2, cross valve 3, outdoor electric expansion valve 5, and outdoor heat converter 4.The first indoor unit 6a has indoor electric expansion valve 7a and indoor heat converter 8a.The second indoor unit 6b is provided with indoor electric expansion valve 7b and indoor heat converter 8b.In addition, the first branch units 20a has electric dump valve 21a and electric inlet valve 22a, and the second branch units 20b has electric dump valve 21b and electric inlet valve 22b.
The operation of this multiple-unit formula air-conditioning equipment is as follows.Referring to Fig. 1, when the first indoor unit 6a in operation under the heating mode and the second indoor unit 6b when under refrigeration mode, operating, and the high-pressure refrigerant that be used for heat room air that supply with from compressor 2 is passed in the indoor heat converter 8a of operation heating mode under and mobile at liquid line 9 by indoor electric expansion valve 7a by high-pressure air pipe 17.Liquid refrigerant is at the part A separated into two parts.That is, some liquid refrigerants flow into the indoor heat converter 8b that operates under refrigeration mode, and remaining cold-producing medium flows to outdoor heat converter 4.For the liquid refrigerant of appropriate amount being supplied with the indoor heat converter 8b that operates under refrigeration mode, need pressure controling chamber's dispatch from foreign news agency expansion valve 5 according to liquid line 9 in part A.
In this traditional multiple-unit formula air-conditioning equipment shown in Figure 1, when the refrigerant pipe that outdoor unit 1 is connected to the first and second indoor unit 6a and 6b is longer, remaining refrigerant amount increases in liquid line 9, has therefore reduced the refrigerant amount that flows into the second indoor unit 6b that operates under refrigeration mode relatively.In addition, when the ambient temperature of outdoor unit 1 was relatively low, the pressure of outdoor unit 1 was lower, and therefore, a large amount of cold-producing mediums flows to outdoor unit 1, and flowed into the refrigerant amount minimizing of the second indoor unit 6b that operates under refrigeration mode thus.Similarly, when the cold-producing medium that does not have q.s flow to the second indoor unit 6b that operates under refrigeration mode, the cooling capacity of the second indoor unit 6b or cooling capacity (cooling capacity) worsened.
Moreover as shown in Figure 1, outdoor electric expansion valve 5 is controlled, flows to the second indoor unit 6b that operates after being passed in the first indoor unit 6a that operates heating mode under with the liquid refrigerant that allows appropriate amount under refrigeration mode.Yet, traditional multiple-unit formula air-conditioning equipment has following problem, promptly, consider the outdoor heat converter 4 that is used as evaporimeter owing to use the degree of superheat of outdoor electric expansion valve 5, must control room dispatch from foreign news agency expansion valve 5 open ratio, the cold-producing medium of therefore supplying with the second indoor unit 6b appropriate amount of operating equably under refrigeration mode is difficult.
Summary of the invention
Correspondingly, an aspect of of the present present invention provides the method for a kind of multiple-unit formula air-conditioning equipment and this air-conditioning equipment of control, when each indoor unit when operation and air-conditioning equipment are mainly carried out heating mode and operated under refrigeration and heating mode simultaneously, this air-conditioning equipment allows the cold-producing medium of q.s to supply with the indoor unit of operating under refrigeration mode, thus, strengthen the cooling capacity of the indoor unit of under refrigeration mode, operating.
The present invention's ground others and/or advantage propose part in the following description, and part is apparent owing to describe, or are understood by practice of the present invention.
In order to realize above-mentioned and/or others of the present invention, a kind of multiple-unit formula air-conditioning equipment is provided, comprise outdoor unit, a plurality of indoor units, and mode switch element.Described outdoor unit comprises compressor, cross valve, outdoor electric expansion valve, and outdoor heat converter.In the described indoor unit each comprises indoor electric expansion valve and indoor heat converter.Described mode switch element comprises directional control valve, and described directional control valve is used to change the flow direction of cold-producing medium, thereby cold-producing medium flows to compressor from each or each from indoor heat converter that compressor flows to the indoor heat converter; And the electric expansion valve, the outlet side that described electric expansion valve is installed in as the indoor heat converter of condenser flows to as the indoor heat converter of evaporimeter and the refrigerant amount of compressor from the indoor heat converter as condenser with control.
The electric expansion valve of described mode switch element is installed on the common pipe of a plurality of refrigerant pipe joints that stretch out from the outlet side as the indoor heat converter of condenser.
Described mode switch element also comprises flow control valve, described flow control valve be connected with the electric expansion valve of mode switch element in case with the electric expansion valve of mode switch element in parallel.
In order to realize above-mentioned and/or others of the present invention, a kind of multiple-unit formula air-conditioning equipment is provided, comprise outdoor unit, a plurality of indoor units, mode switch element, outdoor air temperature sensor and control module.Described outdoor unit comprises compressor, cross valve, outdoor electric expansion valve, and outdoor heat converter.In the described indoor unit each comprises indoor electric expansion valve and indoor heat converter.Described mode switch element comprises directional control valve, and described directional control valve is used to change the flow direction of cold-producing medium, thereby cold-producing medium flows to compressor from each or each from indoor heat converter that compressor flows to the indoor heat converter; And the electric expansion valve, the outlet side that described electric expansion valve is installed in as the indoor heat converter of condenser flows to as the indoor heat converter of evaporimeter and the refrigerant amount of compressor from the indoor heat converter as condenser with control.Outdoor air temperature sensor is arranged in the outdoor unit to survey outside air temperature.Described control module is according to the ratio of opening of the electric expansion valve of the output valve control model switch unit of outdoor air temperature sensor, carries out refrigeration and heating mode operating period simultaneously when air-conditioning equipment thus and controls the refrigerant amount that flows to the indoor unit of operating under heating mode from the indoor unit of operating under refrigeration mode when mainly carrying out the heating mode operation.
Described control module is opened in 15% to 25% the scope that ratio is controlled at electric expansion valve full open position the electric expansion valve of mode switch element.
When outside air temperature is low described control module further reduce mode switch element the electric expansion valve open ratio, increase the refrigerant amount that flows to the indoor unit of under refrigeration mode, operating from the indoor unit of under heating mode, operating thus.
Described mode switch element also comprises flow control valve, described flow control valve is connected with the electric expansion valve of mode switch element so that in parallel with the electric expansion valve of mode switch element, and when air-conditioning equipment carry out simultaneously refrigeration and heating mode operating period when mainly carrying out heating mode and operating described control module close flow control valve.
In the described indoor unit each also comprise survey in the indoor heat converter each entrance side and the inlet temperature sensor and the outlet temperature sensor of outlet side temperature, and control module is according to the ratio of opening based on the electric expansion valve of the further control model switch unit of degree of superheat of the output valve of the inlet temperature sensor of the indoor unit of operating under refrigeration mode and outlet temperature sensor output.
Description of drawings
Describe preferred embodiment in conjunction with the drawings in detail, above-mentioned and others of the present invention and advantage become apparent and be readily appreciated that, wherein:
Fig. 1 is the refrigerant lines figure that describes traditional multiple-unit formula air-conditioning equipment;
Fig. 2 is the refrigerant lines figure according to the multiple-unit formula air-conditioning equipment of the embodiment of the invention;
Fig. 3 is the flow chart of the method for control multiple-unit formula air-conditioning equipment when air-conditioning equipment is carried out refrigeration and heating mode operation simultaneously;
Fig. 4 is the curve map of refrigerating capacity that is described in the indoor unit of refrigeration mode operation, the function of opening ratio of the electric expansion valve of the mode switch element that this curve map is controlled under specific indoor and outdoors temperature as multiple-unit formula air-conditioning equipment shown in Figure 2; And
Fig. 5 is the curve map of refrigerating capacity that is described in the indoor unit of refrigeration mode operation, and this curve map is as the function of opening ratio at the electric expansion valve that is different from the mode switch element of controlling under the indoor and outdoors temperature shown in Figure 4.
The specific embodiment
Introduce the preferred embodiments of the present invention now in detail, its example is wherein represented components identical with identical label as shown in drawings in full.
Fig. 2 is the refrigerant lines figure according to the multiple-unit formula air-conditioning equipment of the embodiment of the invention.As shown in Figure 2, according to embodiments of the invention, multiple-unit formula air-conditioning equipment comprises an outdoor unit 100, first to fourth indoor unit 200a, 200b, 200c and 200d, and mode switch element 300.Mode switch element 300 is installed on the refrigerant pipe between outdoor unit 100 and indoor unit 200a, 200b, 200c and the 200d.
Among indoor unit 200a, 200b, 200c and the 200d each comprises indoor heat converter 201a, 201b, 201c and 201d, indoor electric expansion valve 202a, 202b, 202c and 202d, be used for sensing indoor heat converter 201a, 201b, 201c and 201d each entrance side and inlet temperature sensor 203a, 203b, 203c and 203d and outlet temperature sensor 204a, 204b, 204c and the 204d of the temperature of outlet side.
Mode switch element 300 comprises High-pressure air valve 301a, 301b, 301c and 301d, low pressure gas valve 302a, 302b, 302c and 302d and electric expansion valve 303.Among High-pressure air valve 301a, 301b, 301c and the 301d each is arranged on the high-pressure air pipe (HPP) between among outdoor unit 100 and indoor unit 200a, 200b, 200c and the 200d each.Among low pressure gas valve 302a, 302b, 302c and the 302d each is arranged on the low pressure tracheae (LPP) between among outdoor unit 100 and indoor unit 200a, 200b, 200c and the 200d each.Electric expansion valve 303 is arranged on the common pipe between indoor unit 200a, 200b, 200c and 200d and the outdoor unit 100.In this case, High-pressure air valve 301a, 301b, 301c and 301d and low pressure gas valve 302a, 302b, 302c and 302d are as the refrigerant flow direction control valve, changing the flow direction of cold-producing medium, thereby cold-producing medium flow to compressor 103a and 103b from each or each from indoor heat converter 201a, 201b, 201c and 201d that compressor 103a and 103b flow to indoor heat converter 201a, 201b, 201c and the 201d.
One end of the cross valve 104 of outdoor unit 100 is connected on High-pressure air valve 301a, 301b, 301c and the 301d of mode switch element 300 by HPP.And the acescent 107 of outdoor unit 100 is connected on low pressure gas valve 302a, 302b, 302c and the 302d of mode switch element 300 by LPP.
In addition, return duct (RP) is arranged between outdoor heat converter 101a and 101b and the mode switch element 300.Outdoor electric expansion valve 102 is installed in the precalculated position of RP.Flow or flow control valve 102 ' are arranged on the RP in parallel with outdoor electric expansion valve 102.
RP is connected on outlet EP1, EP2, EP3 and the EP4 of indoor heat converter 201a, 201b, 201c and 201d.The junction of the electric expansion valve 303 of mode switch element 300 between RP and outlet EP1, EP2, EP3 and EP4.According to the present invention, except outdoor electric expansion valve 102, the electric expansion valve 303 of mode switch element 300 is installed in the meet of the cold-producing medium of indoor heat converter 201a, 201b, 201c and 201d supply from indoor unit 200a, 200b, 200c and 200d, even can prevent also when RP is longer that thus cold-producing medium from remaining in the refrigerant pipe, this structure is different from traditional mode of control room dispatch from foreign news agency expansion valve.
In addition, flow control valve 303 ' is connected in parallel with electric expansion valve 303.Open by control flow control valve 303 ' and electric expansion valve 303 that ratio controls flow to outdoor heat converter 101a and 101b and the refrigerant amount of the indoor heat converter 201a of the first indoor unit 200a that operates under refrigeration mode.
Compressor 103a and 103b, cross valve 104, outdoor electric expansion valve 102, the electric expansion valve 303 of mode switch element 300, the flow control valve 303 ' of mode switch element 300, High-pressure air valve 301a, 301b, 301c and 301d, and low pressure gas valve 302a, 302b, 302c and 302d are controlled by the outdoor control unit (not shown).Simultaneously, each among indoor electric expansion valve 202a, 202b, 202c and the 202d is controlled by the indoor control unit (not shown).
The process of carrying out refrigeration mode operation and heating mode operation when this air-conditioning equipment is mainly carried out the heating mode operation simultaneously will be described below.
As shown in Figure 2, when the first indoor unit 200a under refrigeration mode, operate and other indoor unit (promptly, second to the fourth ventricle unit 200b, 200c and 200d) when under heating mode, operating, under heating mode, operate second to the fourth ventricle low pressure gas valve 302b, 302c and the 302d of unit 200b, 200c and 200d be closed, and the low pressure gas valve 302a of the first indoor unit 200a that operates under refrigeration mode opens.On the other hand, the High-pressure air valve 301a of the first indoor unit 200a that operates under refrigeration mode is closed, and under heating mode, operate second to the fourth ventricle High-pressure air valve 301b, 301c and the 301d of unit 200b, 200c and 200d be opened.
The high-temperature high-pressure gas refrigerant that compresses in compressor 103a and 103b flows to indoor heat converter 201b, 201c and 201d as condenser subsequently by HPP and High-pressure air valve 301b, 301c and 301d, to carry out heat exchanging process.The cold-producing medium of supplying with from indoor heat converter 201b, 201c and 201d flows to electric expansion valve 303 by outlet EP2, EP3 and the EP4 of indoor heat converter 201b, 201c and 201d.At this moment, the electric expansion valve 303 by control model switch unit 300 opens that ratio controls flow to outdoor heat converter 101a and 101b or the refrigerant amount of the indoor heat converter 201a of the first indoor unit 200a that operates under refrigeration mode.
Promptly, when the flow control valve 303 ' of mode switch element 300 be closed and suitably control electric expansion valve 303 open ratio the time, under heating mode, operate second to the fourth ventricle unit 200b, 200c and heat exchanger 201b, the 201c of 200d and the cold-producing medium that 201d supplies with flow to outdoor heat converter 101a and 101b.Simultaneously, the cold-producing medium of appropriate amount flows to indoor heat converter 201a as the indoor unit 200a of evaporimeter by pipe EP1, and carries out heat exchanging process.The cold-producing medium of supplying with from indoor heat converter 201a flows to acescent 107 by LPP.By this way, an indoor unit is operated under refrigeration mode, and three indoor units are operated under heating mode.
To describe below and ought under refrigeration mode, operate and three indoor unit is operated the electric expansion valve of time control molding formula switch unit under heating mode methods of opening ratio by an indoor unit.
Fig. 3 is when the multiple-unit formula apparatus of air conditioning shown in Figure 2 is carried out refrigeration and heating mode operation simultaneously, the flow chart of the method for the control apparatus of air conditioning.As shown in Figure 3, survey outside air temperature in operation 100 by the outdoor air temperature sensor 108 of outdoor unit 100.
The ratio of opening of the electric expansion valve 303 of mode switch element 300 is controlled according to the outside air temperature that outdoor air temperature sensor 108 detects.Specifically, at first, in operation 110, outside air temperature and preset reference temperature compare, to determine whether outside air temperature is lower than preset reference temperature.
After outside air temperature and preset reference temperature compare, calculate the difference of outside air temperature and preset reference temperature.According to the difference of outside air temperature and preset reference temperature, control the ratio of opening of electric expansion valve 303.Generally when outside air temperature is low, the refrigerant amount that flows to outdoor heat converter 101a and 101b increases, but the refrigerant amount that flows to the indoor heat converter 201a of the indoor unit 200a that operates under refrigeration mode is less than needed quantity, thereby, the cooling capacity of indoor unit 200a is worsened.In this case, close at operation 120 electric expansion valves 303, to reduce the ratio of opening of electric expansion valve 303, thereby the refrigerant amount that flows to outdoor heat converter 101a and 101b reduces, and increases the refrigerant amount of the indoor heat converter 201a that flows to the indoor unit 200a that operates under refrigeration mode simultaneously.
Simultaneously, when outside air temperature is higher, the refrigerant amount that flows to outdoor heat converter 101a and 101b reduces, and the refrigerant amount that flows to the indoor heat converter 201a of the indoor unit 200a that operates simultaneously under refrigeration mode surpasses requirement, thereby the cooling capacity of indoor unit 200a is worsened.In this case, open to increase the ratio of opening of electric expansion valve 303 at operation 130 electric expansion valves 303, thereby increase the refrigerant amount that flows to outdoor heat converter 101a and 101b, reduce the refrigerant amount of the indoor heat converter 201a that flows to the indoor unit 200a that under refrigeration mode, operates simultaneously.
In this case, the electric expansion valve 303 by a step definition mode switch unit 300 opens ratio.That is, the whole step had for 2001 steps, that is, open ratio and going on foot the 0 scope inner control to the step 2000.In the step 0, electric expansion valve 303 cuts out fully.In the step 2000, electric expansion valve 303 is opened fully.According to embodiments of the invention, preferably open ratio, i.e. scopes to the step 500 at the electric expansion valve 303 of 15% to 25% scope inner control mode switch element 300 of electric expansion valve 303 full open position in the step 300 according to outside air temperature.
In operation 140, after the electric expansion valve 303 of initial or preliminary control model switch unit 300, inlet temperature sensor 203a and outlet temperature sensor 204a survey the entrance and exit temperature of the indoor heat converter 201a of the indoor unit 200a that operates under refrigeration mode, inlet temperature sensor 203a and outlet temperature sensor 204a survey the entrance and exit temperature of indoor heat converter 201a.
The ratio of opening of the electric expansion valve 303 of mode switch element 300 is controlled according to the entrance and exit temperature that detects.The process of opening ratio of control electric expansion valve 303 is as follows.At first, the difference between the entrance and exit temperature that step 150 calculating detects, i.e. degree of superheat (inlet temperature one outlet temperature).
After having calculated degree of superheat, the electric expansion valve 303 of secondary control model switch unit 300 open ratio.That is, in operation 160, control module will compare in operation 150 degrees of superheat of calculating and default degree of superheat, with the degree of superheat of determining whether degree of superheat equals to preset.When determining that in operation 160 degrees of superheat equal default degree of superheat, the refrigerant amount of indoor heat converter 201a that flows to the indoor unit 200a that operates under refrigeration mode is suitable.In this case, at the electric expansion valve 303 of operation 180 control module control model switch units 300, thereby electric expansion valve 303 keeps the default ratio of opening.Thus, the refrigerant amount that flows to the indoor heat converter 201a of the first indoor unit 200a that operates under refrigeration mode keeps identical.
Simultaneously, when determining that in operation 160 degrees of superheat are higher than default degree of superheat, the refrigerant amount of indoor heat converter 201a that flows to the indoor unit 200a that operates under refrigeration mode is too much.In this case, at the ratio of opening of the electric expansion valve 303 of operating 170 control module control model switch units 300, open ratio thereby reduce.Thus, the refrigerant amount that flows to the indoor heat converter 201a of the indoor unit 200a that operates under refrigeration mode reduces.
In addition, when determining that in operation 160 degrees of superheat are lower than default degree of superheat, a large amount of cold-producing mediums must flow to the indoor heat converter 201a of the first indoor unit 200a that operates under refrigeration mode.In this case, at the ratio of opening of the electric expansion valve 303 of operating 190 control module control model switch units 300, open ratio thereby increase.Thus, flow to the refrigerant amount increase of the indoor heat converter 201a of the first indoor unit 200a that under refrigeration mode, operates.
According to the present invention, the ratio of opening of the electric expansion valve of mode switch element is controlled in 15% to 25% the scope of electric expansion valve full open position according to outside air temperature.In this case, when at as shown in Figure 4 indoor air temperature be 21 ℃ of (dry-bulb temperature)/15 ℃ (wet-bulb temperature) and outside air temperature be under-5 ℃ the situation or as shown in Figure 5 indoor air temperature be 27 ℃ of (dry-bulb temperature)/19 ℃ (wet-bulb temperature) and outside air temperature be under-5 ℃ the situation control electric expansion valve open ratio the time, the cooling capacity of the indoor unit of operating under refrigeration mode or cooling capacity (coolingcapacity) have increased by 116%.On the contrary, in the correlation technique of opening ratio of control room dispatch from foreign news agency expansion valve, with the situation of the same terms as mentioned above under the cooling capacity of the indoor unit under refrigeration mode, operated only be 14% to 40%.In correlation technique, although increased outside air temperature, the maximum one of the indoor unit of operating under refrigeration mode approximately is 77%.Therefore, compare with traditional method, when opening in 15% to 25% the scope of ratio in electric expansion valve 303 full open position of the electric expansion valve 303 of control model switch unit 300, in the time of promptly in step 300 to step 500 scope, advantage of the present invention is that the cooling capacity of the indoor unit operated under refrigeration mode significantly increases.
Can obviously find out from top explanation, the invention provides a kind of multiple-unit formula air-conditioning equipment, this multiple-unit formula air-conditioning equipment so designs, be that the electric expansion valve is installed in cold-producing medium flows to outdoor heat converter from indoor heat converter common pipe, flow to the refrigerant amount of the indoor heat exchanger of the indoor unit of under refrigeration mode, operating from the indoor heat converter of the indoor unit under heating mode, operated with control, and so design, promptly when carrying out refrigeration and heating mode operation simultaneously, this apparatus of air conditioning controls the ratio of opening of electric expansion valve according to outdoor temperature, although the refrigerant pipe between outside air temperature variation or outdoor unit and the indoor unit is longer thus, but supply with the cold-producing medium of the indoor unit appropriate amount of under refrigeration mode, operating, thus, the cooling capacity of the indoor unit that enhancing is operated under refrigeration mode, thereby, allow optimum operation.
Although illustrate and described the preferred embodiments of the present invention, but do not departing from principle of the present invention and spirit, under the situation of claim and its doctrine of equivalents institute restricted portion, can make modification to this embodiment, this is conspicuous to those skilled in the art.
Claims (16)
1. multiple-unit formula air-conditioning equipment comprises:
Outdoor unit, described outdoor unit comprises compressor, cross valve, outdoor electric expansion valve, and outdoor heat converter;
A plurality of indoor units, each in the described indoor unit comprises indoor electric expansion valve and indoor heat converter; And
Mode switch element, described mode switch element comprises:
Directional control valve, described directional control valve is used to change the flow direction of cold-producing medium, thus cold-producing medium flows to compressor from each or each from indoor heat converter that compressor flows to the indoor heat converter; And
The outlet side that electric expansion valve, described electric expansion valve are installed in as the indoor heat converter of condenser flows to as the indoor heat converter of evaporimeter and the refrigerant amount of compressor from the indoor heat converter as condenser with control.
2. multiple-unit formula air-conditioning equipment according to claim 1, the electric expansion valve of wherein said mode switch element are installed on the common pipe of the extended a plurality of refrigerant pipe joints of outlet side of the indoor heat converter that is used as condenser.
3. multiple-unit formula air-conditioning equipment according to claim 1, wherein said mode switch element also comprises flow control valve, described flow control valve is connected so that in parallel with the electric expansion valve of mode switch element with the electric expansion valve of mode switch element.
4. multiple-unit formula air-conditioning equipment comprises:
Outdoor unit, described outdoor unit comprises compressor, cross valve, outdoor electric expansion valve, and outdoor heat converter;
A plurality of indoor units, each in the described indoor unit comprises indoor electric expansion valve and indoor heat converter;
Mode switch element, described mode switch element comprises:
Directional control valve, described directional control valve is used to change the flow direction of cold-producing medium, thus cold-producing medium flows to compressor from each or each from indoor heat converter that compressor flows to the indoor heat converter; And
The outlet side that electric expansion valve, described electric expansion valve are installed in as the indoor heat converter of condenser flows to as the indoor heat converter of evaporimeter and the refrigerant amount of compressor from the indoor heat converter as condenser with control;
Be arranged in the outdoor unit to survey the outdoor air temperature sensor of outside air temperature;
Control module, described control module is according to the ratio of opening of the electric expansion valve of the output valve control model switch unit of outdoor air temperature sensor, carries out refrigeration and heating mode operating period simultaneously when air-conditioning equipment thus and controls the refrigerant amount that flows to the indoor unit of operating under heating mode from the indoor unit of operating under refrigeration mode when mainly carrying out the heating mode operation.
5. multiple-unit formula air-conditioning equipment according to claim 4, wherein said control module is opened in 15% to 25% the scope that ratio is controlled at electric expansion valve full open position the electric expansion valve of mode switch element.
6. multiple-unit formula air-conditioning equipment according to claim 4, wherein when outside air temperature is low described control module further reduce mode switch element the electric expansion valve open ratio, increase the refrigerant amount that flows to the indoor unit of under refrigeration mode, operating from the indoor unit of under heating mode, operating thus.
7. multiple-unit formula air-conditioning equipment according to claim 4, wherein said mode switch element also comprises flow control valve, described flow control valve is connected in parallel with the electric expansion valve of mode switch element, and when air-conditioning equipment carry out simultaneously refrigeration and heating mode operating period when mainly carrying out heating mode and operating described control module close flow control valve.
8. multiple-unit formula air-conditioning equipment according to claim 4, in the wherein said indoor unit each also comprise survey in the indoor heat converter each entrance side and the inlet temperature sensor and the outlet temperature sensor of outlet side temperature, and control module is according to the ratio of opening based on the electric expansion valve of the further control model switch unit of degree of superheat of the output valve of the inlet temperature sensor of the indoor unit of operating under refrigeration mode and outlet temperature sensor output.
9. method of controlling multiple-unit formula air-conditioning equipment, described multiple-unit formula air-conditioning equipment comprises:
Outdoor unit, described outdoor unit comprises compressor, cross valve, outdoor electric expansion valve, outdoor heat converter, and outdoor air temperature sensor;
A plurality of indoor units, each in the described indoor unit comprises indoor electric expansion valve and indoor heat converter;
Mode switch element, described mode switch element comprises:
Directional control valve, described directional control valve is used to change the flow direction of cold-producing medium, thus cold-producing medium flows to compressor from each or each from indoor heat converter that compressor flows to the indoor heat converter; And
The outlet side that electric expansion valve, described electric expansion valve are installed in as the indoor heat converter of condenser flows to as the indoor heat converter of evaporimeter and the refrigerant amount of compressor from the indoor heat converter as condenser with control; And
Control module, described control module control compressor, cross valve, directional control valve, and the electric expansion valve of mode switch element, multiple-unit formula air-conditioning equipment is so operated, and promptly indoor unit is operated under refrigeration mode and heating mode simultaneously, and described method comprises:
Carry out refrigeration and heating mode operating period simultaneously when air-conditioning equipment and survey outside air temperature by outdoor air temperature sensor when mainly carrying out heating mode and operating; And
The outside air temperature that detects and preset reference temperature are compared with the ratio of opening according to the electric expansion valve of outside air temperature that detects and the difference control model switch unit between the preset reference temperature.
10. method according to claim 9, wherein the electric expansion valve of mode switch element opens in 15% to 25% the scope that ratio is controlled in electric expansion valve full open position.
11. method according to claim 9, the wherein corresponding level of difference between outside air temperature that ratio is reduced to and detects and the preset reference temperature of opening of the electric expansion valve of mode switch element when the outside air temperature that detects is higher than the preset reference temperature.
12. method according to claim 9, wherein when the outside air temperature that detects is lower than the preset reference temperature electric expansion valve of mode switch element open the corresponding predeterminated level of difference between outside air temperature that ratio is increased to and detects and the preset reference temperature.
13. a method of controlling multiple-unit formula air-conditioning equipment, described multiple-unit formula air-conditioning equipment comprises:
Outdoor unit, described outdoor unit comprises compressor, cross valve, outdoor electric expansion valve, outdoor heat converter, and outdoor air temperature sensor;
A plurality of indoor units, each in the described indoor unit comprises indoor electric expansion valve and indoor heat converter;
Mode switch element, described mode switch element comprises:
Directional control valve, described directional control valve is used to change the flow direction of cold-producing medium, thus cold-producing medium flows to compressor from each or each from indoor heat converter that compressor flows to the indoor heat converter; And
The outlet side that electric expansion valve, described electric expansion valve are installed in as the indoor heat converter of condenser flows to as the indoor heat converter of evaporimeter and the refrigerant amount of compressor from the indoor heat converter as condenser with control; And
Control module, described control module control compressor, cross valve, directional control valve, and the electric expansion valve of mode switch element, multiple-unit formula air-conditioning equipment is so operated, and promptly indoor unit is operated under refrigeration mode and heating mode simultaneously, and described method comprises:
Survey outside air temperature by outdoor air temperature sensor;
The ratio of opening according to the electric expansion valve of the preliminary control model switch unit of the outside air temperature that detects;
Inlet temperature sensor and outlet temperature sensor by the indoor unit of operating under refrigeration mode are surveyed the entrance side of the indoor unit of operating and the temperature of outlet side under refrigeration mode; And
The ratio of opening based on the electric expansion valve of the temperature secondary control model switch unit of the entrance side of the indoor unit of under refrigeration mode, operating that detects and outlet side.
14. method according to claim 13, wherein when ratio is opened in preliminary control, the opening in 15% to 25% the scope that ratio is controlled in electric expansion valve full open position of the electric expansion valve of mode switch element.
15. method according to claim 13 is wherein carried out the preliminary control of opening ratio when outside air temperature is lower than the preset reference temperature.
16. method according to claim 13, wherein open in the ratio in secondary control, the ratio of opening of the electric expansion valve of mode switch element increases gradually when the entrance side temperature is higher than the outlet side temperature, corresponding with the entrance side and the temperature gap between the outlet side of the indoor heat converter of the indoor unit of under refrigeration mode, operating, and the ratio of opening of the electric expansion valve of mode switch element reduces gradually when the entrance side temperature is lower than the outlet side temperature, and is corresponding with the entrance side and the temperature gap between the outlet side of the indoor heat converter of the indoor unit of operating under refrigeration mode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020030042327A KR100903148B1 (en) | 2003-06-27 | 2003-06-27 | Multi-chamber type air conditioner and control method thereof |
| KR200342327 | 2003-06-27 |
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| Publication Number | Publication Date |
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| CN1576730A true CN1576730A (en) | 2005-02-09 |
| CN100520226C CN100520226C (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003101179720A Expired - Fee Related CN100520226C (en) | 2003-06-27 | 2003-11-26 | Multi-unit type air conditioning equipment and control method thereof |
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| Country | Link |
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| KR (1) | KR100903148B1 (en) |
| CN (1) | CN100520226C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900678B (en) * | 2005-07-22 | 2010-08-18 | 三星电子株式会社 | Air conditioner inspection method |
| CN101449117B (en) * | 2006-05-26 | 2010-10-20 | 大金工业株式会社 | Freezing device |
| CN101571327B (en) * | 2009-06-05 | 2013-07-17 | 江苏春兰空调设备有限公司 | Control method of multi-connected heat pump air-conditioning unit parallelly connected by outdoor units |
| CN104748428A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN105180497A (en) * | 2008-10-29 | 2015-12-23 | 三菱电机株式会社 | Air conditioning device |
| CN110736270A (en) * | 2019-10-29 | 2020-01-31 | 珠海格力电器股份有限公司 | Opening degree control method and device of electronic expansion valve |
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| KR100728223B1 (en) * | 2005-02-02 | 2007-06-14 | 엘지전자 주식회사 | Apparatus for controlling refrigerant volume of separating type air conditioner |
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| KR100860035B1 (en) * | 2007-01-19 | 2008-09-25 | 엘지전자 주식회사 | Air-conditioning system and controlling method for the same |
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| KR101633793B1 (en) | 2009-05-01 | 2016-06-27 | 엘지전자 주식회사 | A Control method of an air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3356485B2 (en) * | 1993-05-07 | 2002-12-16 | 松下冷機株式会社 | Multi-room air conditioner |
| JPH11142016A (en) | 1997-11-06 | 1999-05-28 | Fujitsu General Ltd | Multi-chamber type air conditioning apparatus |
| JP2002089996A (en) * | 2000-09-20 | 2002-03-27 | Fujitsu General Ltd | Multi-chamber type air conditioner |
-
2003
- 2003-06-27 KR KR1020030042327A patent/KR100903148B1/en active IP Right Grant
- 2003-11-26 CN CNB2003101179720A patent/CN100520226C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900678B (en) * | 2005-07-22 | 2010-08-18 | 三星电子株式会社 | Air conditioner inspection method |
| CN101449117B (en) * | 2006-05-26 | 2010-10-20 | 大金工业株式会社 | Freezing device |
| CN105180497A (en) * | 2008-10-29 | 2015-12-23 | 三菱电机株式会社 | Air conditioning device |
| CN105180497B (en) * | 2008-10-29 | 2017-12-26 | 三菱电机株式会社 | Conditioner |
| CN101571327B (en) * | 2009-06-05 | 2013-07-17 | 江苏春兰空调设备有限公司 | Control method of multi-connected heat pump air-conditioning unit parallelly connected by outdoor units |
| CN104748428A (en) * | 2015-03-31 | 2015-07-01 | 广东美的暖通设备有限公司 | Multi-split system |
| CN110736270A (en) * | 2019-10-29 | 2020-01-31 | 珠海格力电器股份有限公司 | Opening degree control method and device of electronic expansion valve |
| CN110736270B (en) * | 2019-10-29 | 2020-11-03 | 珠海格力电器股份有限公司 | Opening degree control method and device of electronic expansion valve |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050002962A (en) | 2005-01-10 |
| CN100520226C (en) | 2009-07-29 |
| KR100903148B1 (en) | 2009-06-16 |
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