CN1131394C - Air conditioning system - Google Patents
Air conditioning system Download PDFInfo
- Publication number
- CN1131394C CN1131394C CN 97116219 CN97116219A CN1131394C CN 1131394 C CN1131394 C CN 1131394C CN 97116219 CN97116219 CN 97116219 CN 97116219 A CN97116219 A CN 97116219A CN 1131394 C CN1131394 C CN 1131394C
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- China
- Prior art keywords
- condensing unit
- compressor
- cooling device
- cooling
- liquid
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- Expired - Fee Related
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- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
An air conditioning system includes an outdoor condensing device for plural independent indoor cooling devices. The condensing device includes a fan-coil unit for controlling liquid cooling medium flow to the cooling device. The system adopts a normally open electromagnetic valve, when the power supply for the system is cut off, a liquid path will be advantageously opened to allow the system hold pressure balance before restart. A compressor has a hot gas feedback device. When the number of used cooling device is less than the capacity of the compressor, a part of the hot gas output from the compressor is fed to its inlet in order to effectively increase the load for the compressor. The liquid cooling medium is prevented to reach the compressor.
Description
Technical field
The present invention relates generally to air-conditioning, and more specifically but not exclusively, but relate to a kind of condensing unit of air-conditioning system of the cooling device that is used to have a plurality of independent operations.
Background technology
In typical application, condensing unit will be installed in the outside of building to be cooled, and cooling device can be arranged on various occasions to be cooled, for example room in room or apartment.This universal system provides several advantages, and main one is to share one or more compressors and condenser causes having saved raw material and reduced production cost owing to a plurality of cooling devices.In addition, only adopting an outdoor location is preferably from aesthetic saying, has simplified maintenance and may be because the regulation of shortage space or local government is required.Yet, since all indoor set seldom (even having) time in office be in user mode, this system requirements flows between outdoor location and indoor set to cold-producing medium and controls subtly, to guarantee reliable and safe operation.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of air-conditioning system that satisfies the condensing unit of these requirements and include this condensing unit
On the one hand, the invention provides a kind of condensing unit that is used to have the air-conditioning system of a plurality of cooling devices that can independently control, this condensing unit comprises:
One compressor is arranged to from described cooling device receiver gases refrigerant;
One condenser is used for the gas refrigeration medium by compressor compresses is condensed into the liquid refrigerating medium;
A plurality of liquid lines are used for selectively the liquid refrigerating medium being offered each described cooling device;
Each liquid line has normally open solenoid valve separately, and be used to control the liquid refrigerating medium and offer coupled cooling device, and
The electronic logic control device in response to the input signal from described cooling device, is used to control the operation of each normally open valve;
Wherein each described normally open valve is applicable to when this normally open valve is in nonexcited state, provides the liquid of opening to transmit by its pipe that links to each other.
On the other hand, the invention provides a kind of air-conditioning system that includes such condensing unit and a plurality of cooling devices that link to each other with this condensing unit.
According to the present invention, under the situation of interrupting this system's power supply, by means of normally open valve, the refrigerant path keeps opening to allow in this system by the pressure balance before heavily moving.Power supply can be turn-offed the power supply of system or is interrupted by cutting off the electricity supply by the user.In a preferred embodiment, each normally open valve is a normally open solenoid valve.Therefore may use element relatively cheap and that be easy to obtain.
Air-conditioning system in the routine of use normally closed solenoid valve in the liquid line of indoor unit is caught cooling medium when it is not worked.As a result, compressor the time is had to bear high discharge pressure in starting and is carried out work.Will shorten the life-span of compressor electric motor like this.Condensing unit of the present invention has overcome this problem with a kind of simple and high-efficiency method, and does not increase cost.
And according to the present invention, an electronic logic control device provides effectively and centralized Control from all electronic components, magnetic valve, compressor and the fan of a single circuit board to this system.This characteristic provides chance for saving the cost microminiaturization, and compares the reliability with raising with the controller of the prior art of being made up of electromechanical compo.As a preferable characteristic, this circuit board directly to controlled element, comprises indoor set, and fan provides electric energy, also can further reduce manufacturing cost thereby make required circuit reduce to minimum.
In a preferred embodiment, each compressor is assembled a device that is used to change its effective power.If the cooling device number that is used at any time for the load of being competent at of this compressor very little, then the liquid refrigerating medium may not can be fully evaporated in fan coil, thereby causes liquid to enter compressor and cause fault.Under opposite extreme situations, fan coil can take place freezing.When work the indoor set number seldom, when for example having only one, this problem can solve by presenting a part of hot gas from compressor outlet to its import.This hot feedback device preferably includes a normally closed solenoid valve.This normally closed solenoid valve also is the relatively cheap and element that is easy to obtain.
Description of drawings
With reference to the accompanying drawing detailed description of the preferred embodiment, others of the present invention, feature and advantage will become obviously by following, in the accompanying drawing:
Fig. 1 is the refrigerating circuit figure of an air-conditioning system;
Fig. 2 is the electronic circuitry of this air-conditioning system;
Fig. 3 is this electronically controlled functional-block diagram;
Fig. 4 is the input of this control logic of expression and the schematic diagram of output; And
Fig. 5 is a logical table.
The specific embodiment
Referring to accompanying drawing, Fig. 1 shows the primary element according to the refrigerating circuit of an air-conditioning system of one embodiment of the invention.This system comprises a plurality of indoor cooling devices, the fan coil device known to promptly in the prior art.In this embodiment, five fan coil devices (FCU1 to FCU5) are arranged.Each fan coil device comprises that the cooling-part and of a coiled pipe form is used for treating the blower fan of cooled air guiding by this coil pipe.
At work, the liquid refrigerating medium enters coil pipe, evaporates and forms gas, blows out or inhaled air provides the latent heat of evaporation and is cooled in this processing by blower fan.Because therefore the basic comprising of this fan coil device and be operating as commonly and well-known does not constitute a part of the present invention, and it is not further described.
This system also comprises an outdoor condensing unit, and its control refrigerant is that the liquid refrigerating medium is to reuse by flowing and will changing back from the hot gas that fan coil forms of each fan coil device.In this embodiment, these fan coil devices are divided into two groups, and these two groups are independently being linked to each other in the fluid loop.Form by three fan coil devices (FCU, FCU3, FCU5) for first group, form by two fan coil devices (FCU2 and FCU4) for second group.For each loop, the parts of condensing unit include a compressor, and this compressor has the outlet (13 or 14) that an import (11 or 12) and from coupled fan coil group of received hot gas is connected to the condenser coil (15 or 16) of condenser.Two condenser coils (15,16) of each refrigerating circuit are arranged in the same metal cooling structure and by a common blower fan (not shown) easily provides service.The outlet of each condenser coil (17 or 18) is used for the liquid refrigerating medium is offered the fan coil device of this group through being connected to each liquid line (21 to 23 or 24,25) at this by elementary (19) and secondary (20) expansion element that capillary constitutes.Whether each liquid refrigerating medium tube (21 to 25) comprises a normally open solenoid valve (LSA to LSE) that is configured, to require cooling to allow according to coupled fan coil device or to stop cold MEDIA FLOW to this fan coil device.
As an additional feature, each compressor comprises previous described hot gas feedback device.This device comprises that one is connected outlet of this compressor (COMP1 or COMP2) and the conduit between the import, and this conduit comprises one in this expansion element that is made of capillary (27 or 26); With one be used to control thermal current and cross the normally closed solenoid valve of this conduit (BS1 or BS2).
The electrical components that this system is all that is to say that liquid refrigerating medium control valve, hot gas feedback device control valve, compressor, condenser fan and indoor set blower fan are by a single electronic control circuit plate control that is loaded in the condensing unit.This control circuit produces output signal according to a logical function and based on the input signal that provides from the fan coil device, is used to control the work of each parts.Each input signal determines whether this described fan coil device requires cooling.
Fig. 2 shows the electronic circuitry of this system.When the user operated switch on the condensing unit, the terminal plate (32) on the control circuit board of this condensing unit (31) offered electric energy the blower fan of each fan coil device.This blower fan running continuously is turned off until this device.The needs that each device cools off are that the state by the inside temperature controller of the state of this switch and this device is determined.When requiring to cool off, the supply voltage that offers this device is returned to a signal terminal (S1 to S5) of this terminal plate at (mainsvoltage).The state of these five signal terminals is controlled at the operation of the logic circuit (33) on the plate (31).The logical process of these input signals cause produce be used for liquid pipe valve (LSA to LSE), compressor (COMP1, COMP2), the control signal of hot gas bypass valve (BS1, BS2) and compressor fan.These control signals are converted into supply voltage by relay (Fig. 2 does not mark) separately, and wherein these relays also are installed on the circuit board (33) easily.Therefore, as required, a plurality of be used to provide supply voltage fan motor (44) and flow valve (LSA to LSE, BS1, the lead-out terminals of solenoid BS2) are provided this circuit board.Under the situation of compressor, these lead-out terminals are in view of the much higher rated power of compressor electric motor and supply voltage is offered the drive coil of each power relay.
Fig. 3 is the block diagram of the element on this control circuit board of explanation.Supply voltage control signal (S1 to S5) is converted into low voltage digital signal in an optoisolator (51).This data signal is transfused to then to the control circuit that suitably is made of transistor logic.Being designed for this logic circuit of carrying out described function is that those skilled in the art can accomplish, does not therefore need to describe in further detail.At last, along with this logical process, this output signal, the low-voltage digital controlled signal is converted back to into power level in a relay assembly (53), and the lead-out terminal (34 to 43) that is used in this plate (31) provides required supply voltage control signal.
Fig. 4 is the schematic diagram of the logical relation between explanation input and the output control signal.Can understand this figure easily in conjunction with the logical table among Fig. 5.In logical table, and from the no cooling requirement of relevant " 0 " of the arbitrary input (S1-S5) of fan coil device indication, or because this device is turned off or because temperature has been lower than the temperature of being preset by temperature controller.On the other hand, " 1 " relevant with arbitrary input (S1-S5) indication is because this device is unlocked and temperature is higher than predeterminated level and need cool off.Now to liquid line valve control signal (LSA-LSE) and hot-gas bypass valve control signal (BS1 BS2) describes, and " OFF " expression valve is in nonexcited state, the situation at the liquid pipe valve of being be out and under the situation of bypass pipe valve for closing.Similarly, " ON " represents that this valve is in foment, it be exactly under liquid pipe valve situation for the pass under the situation of bypass pipe valve for opening.(C1, C2) with outdoor (condenser) blower motor control signal (OFM), " ON " and " OFF " has the logic implication of machine operation and shutoff respectively for compressor control signal.
At work, the one or more indoor sets in response to this group provide cooling.Compressor is unlocked.In this embodiment by two condenser coils shared condenser fan motor be activated, no matter provide cooling by arbitrary or a plurality of indoor set.The liquid line magnetic valve is operated to when the indoor set that links to each other and requires to cool off or (opening) closed when being unpowered in system, otherwise is opened (pass).
The state of each hot gas bypass valve is fixed against time in office in this group is just providing the quantity of the indoor set of cooling.When only having an indoor set just working in this group, compressor is excess load, thus this by-passing valve be opened (opening) thus the inlet that a hot gas is fed back to compressor with effectively in the load that increases it.In this embodiment, have only two work to load compressor (COMP1) satisfactorily in three indoor sets of first group, by-passing valve (BS1) is closed (pass) for normal compressor operating like this.Need not illustrate that when because all three indoor sets of first group and second group or two indoor sets are worked respectively when making the complete load of compressor, this by-passing valve also is closed.
Only for illustrative purposes one embodiment of the invention are had been described in detail, and those skilled in the art are appreciated that and do not exceed many remodeling of making of the present invention.Particularly, the actual quantity of indoor fan coil device is not critical for the principle of the invention.Similarly this system being divided into two or more parallel refrigerating circuits neither be essential.Yet using two such loops is preferably in the situation of one four, five or six cellular systems, uses two compressors and use to have to handle a compressor of the ability that whole indoor sets work simultaneously to compare, and has lower operating cost.These liquid pipe valves can be positioned at liquid line, comprise arbitrary position easily in the fan coil device.
The remodeling of described embodiment provides a condensing unit that is used to serve six fan coil devices.In this remodeling, two refrigerating circuits and the controller that links to each other are arranged, they are the same with appropriate section in first group of three wind face pipe units among the described embodiment.
Claims (17)
1. condensing unit that is used to have the air-conditioning system of a plurality of cooling devices that can independently control, it includes:
One compressor is arranged to from described cooling device receiver gases refrigerant;
One condenser is used for the gas refrigeration medium by compressor compresses is condensed into the liquid refrigerating medium;
A plurality of liquid lines are used for selectively the liquid refrigerating medium being offered each described cooling device;
Each liquid line have one separately be used to control the normally open valve that the liquid refrigerating medium is offered coupled cooling device; And
The electronic logic control device in response to the input signal that provides from described cooling device, is used to control the operation of each normally open valve;
Wherein each described first valve gear is applicable to when normally open valve is in nonexcited state, provides the liquid of opening by coupled liquid line to transmit.
2. according to the condensing unit of claim l, when also including the quantity that is used for when the cooling device that links that cooling is provided, a part of hot gas of compressor output is fed back to the device of the import of compressor less than a predetermined number.
3. according to the condensing unit of claim 2, wherein this feedback device comprises that an outlet with compressor is connected to the conduit of its import, and this conduit has the signal that is used to respond the electronic logic control device, and control is by the normally close valve of the air-flow of this conduit.
4. according to the condensing unit of claim 3, wherein normally close valve is applicable to when it is in a nonexcited state, prevents that gas from flowing through this conduit.
5. according to the condensing unit of claim 4, wherein normally close valve is a normally closed solenoid valve.
6. according to condensing unit any in the claim 2 to 5, the quantity of the condensing unit that wherein said and compressor link is that 2 and described predetermined number are 2.
7. according to the condensing unit of noting one in the claim 2 to 5, the quantity of the cooling device that wherein said and compressor link is that 3 and described predetermined number are 2.
8. according to condensing unit any in preceding claim, wherein normally open valve is a normally open solenoid valve.
9. according to condensing unit any in preceding claim, wherein said a plurality of liquid lines are split up into and are used to be connected to the array of respectively organizing cooling device, and separately a described compressor is provided for each cooling device.
L0. according to the condensing unit of claim 9, wherein said group number is 2.
11. according to the condensing unit of claim 10, wherein the cooling device number is 5, is split up into three cooling devices first group and has second group of two cooling devices.
12. according to the condensing unit of claim 10, wherein the cooling device number is 6, is split up into two groups that respectively have three cooling devices.
13. according to any one condensing unit in the claim 9 to 12, wherein separately a described condenser is provided for and respectively organizes cooling device.
14. according to the condensing unit of claim 13, the common air blower of these condensers shared wherein.
15. according to any one condensing unit in preceding claim, wherein said electronic logic control device comprises transistor-transistor logic circuit.
16., also include and be used to provide the device of electric energy to cooling device according to any one condensing unit in preceding claim.
17. air-conditioning system, include according to any one condensing unit in preceding claim and be connected to a plurality of cooling devices of this condensing unit, each cooling device comprise one can be by refrigerant cooling element and be used to the electronic logic control device to generate the device of a described input signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MYPI9603572 MY121902A (en) | 1996-08-28 | 1996-08-28 | Air conditioning system |
| MYPI9603572 | 1996-08-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1174962A CN1174962A (en) | 1998-03-04 |
| CN1131394C true CN1131394C (en) | 2003-12-17 |
Family
ID=19749752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97116219 Expired - Fee Related CN1131394C (en) | 1996-08-28 | 1997-08-28 | Air conditioning system |
Country Status (5)
| Country | Link |
|---|---|
| CN (1) | CN1131394C (en) |
| HK (1) | HK1005949A1 (en) |
| ID (1) | ID18146A (en) |
| MY (1) | MY121902A (en) |
| SG (1) | SG53032A1 (en) |
-
1996
- 1996-08-28 MY MYPI9603572 patent/MY121902A/en unknown
-
1997
- 1997-08-08 SG SG1997002877A patent/SG53032A1/en unknown
- 1997-08-28 ID IDP973001A patent/ID18146A/en unknown
- 1997-08-28 CN CN 97116219 patent/CN1131394C/en not_active Expired - Fee Related
-
1998
- 1998-06-10 HK HK98105110A patent/HK1005949A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HK1005949A1 (en) | 1999-02-05 |
| ID18146A (en) | 1998-03-05 |
| MY121902A (en) | 2006-03-31 |
| SG53032A1 (en) | 1998-09-28 |
| CN1174962A (en) | 1998-03-04 |
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Granted publication date: 20031217 Termination date: 20120828 |