CN1952531B - Overcooling device for central air conditioner - Google Patents
Overcooling device for central air conditioner Download PDFInfo
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- CN1952531B CN1952531B CN200510015465A CN200510015465A CN1952531B CN 1952531 B CN1952531 B CN 1952531B CN 200510015465 A CN200510015465 A CN 200510015465A CN 200510015465 A CN200510015465 A CN 200510015465A CN 1952531 B CN1952531 B CN 1952531B
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- pipe arrangement
- refrigerant
- subcooler
- compressor
- supercooling
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Abstract
The invention relates to a supercooling device of central air-conditioner, belonging to air-conditioner adjusting technological area, solving superheating of compressor by cool medium flowing into compressor in conventional supercooling device. The technological scheme of problem comprises supercooling device which decreases the temperature of cool medium as heat energy is exchanged with cool medium of inside heat exchanger from outside heat exchanger; recycling pipe, by which drainage port of the supercooling device is connected with cool medium pipe at the inputting side of fluid storage tank; superheating pipe, by which partial cool medium flowing along recycling pipe is transmitted to the cool medium pipe at the drainage side of compressor; and the channel set at the joint position between recycling and superheating pipes, which is controlled by temperature sensor so that the cool medium drained from supercooling device flows to the valve of recycling or superheating pipe. When thetemperature of cool medium drained from supercooling device is higher than the appropriate temperature range, the cool medium from supercooling device is transmitted to the drainage side of compressor so as to prevent high-temperature cool medium entering into compressor.
Description
Technical field
The invention belongs to the air-conditioning technique field, the apparatus for supercooling that relates to central air-conditioning, when the refrigerant temperature of subcooler discharge is higher than the proper temperature scope,, prevent that high temperature refrigerant from flowing into compressor the refrigerant of subcooler discharge, the discharge side that compressor is delivered on the side.
Background technology
Fig. 6 is the conventional art central air-conditioning block diagram that comprises off-premises station.
Traditional central air-conditioning is made of the off-premises station more than and several indoor sets, and off-premises station links to each other by coolant piping with indoor set.
Here, the central air-conditioning off-premises station of conventional art includes and only extract the fluid reservoir 1 that gas coolant is discharged from the refrigerant of indoor set supply; Suck the gas coolant that fluid reservoir 1 is discharged, it is carried out compressor for compressing 2; Be connected with compressor 2, select the four-way valve 3 of the path of compression refrigerant; Allow the refrigerant of four-way valve 3 supply and the outdoor heat converter 4 that outdoor air carries out heat exchange.
In addition, in outdoor heat converter 4, carry out the refrigerant of heat exchange, be fed to by coolant piping in the indoor heat converter (figure slightly) of indoor set, between outdoor heat converter 4 and indoor heat converter, be provided with apparatus for supercooling 5.
When central air-conditioning carried out work with refrigeration mode, 5 pairs of refrigerants that flow to indoor heat converter of apparatus for supercooling cooled off, and raise the efficiency.
Here, the structure to apparatus for supercooling describes.
As shown in Figure 7, apparatus for supercooling 5 comprises refrigerant that outdoor heat converter 4 is discharged, the water conservancy diversion main pipe arrangement 6 to indoor heat converter, encircle the peripheral subcooler 7 of a part of main pipe arrangement 6, the other pipe 8 of providing and delivering of heat exchanger side master pipe arrangement 6-1 and subcooler 7 in the junction chamber, be arranged on the other expansion valve 9 of providing and delivering and managing on 8, allowing the other liquid coolant that send of main pipe arrangement 6-1 expand, connect the dispatch pipe arrangement 8-1 of subcooler 7 and fluid reservoir 1 entrance side.
The refrigerant that is condensed when flowing through outdoor heat converter 4 flows through subcooler 7, moves to indoor heat converter.In the liquid refrigerants that indoor heat converter moves a part, expand cooling subcooler 7 inside by the expansion valve 9 that is located on the other pipe 8 of providing and delivering.And the liquid coolant and the main pipe arrangement 6 that expand carry out heat exchange, allow the liquid coolant that flows through main pipe arrangement 6 inside obtain cooling.
Here, the expansion refrigerant of subcooler 7 inside behind side delivery pipe 8-1 inflow fluid reservoir 1, flows to compressor 2.
When reason owing to initial driving of central air-conditioning or external condition etc., when the refrigerant temperature of inflow apparatus for supercooling 5 is higher than proper temperature, apparatus for supercooling 5 not only can not cool stream to the liquid coolant of indoor heat converter, and flow through the refrigerant temperature that subcooler 7 flows into fluid reservoirs 1 can be than higher.
But in the conventional art, when the refrigerant temperature that flows through apparatus for supercooling 5 inflow fluid reservoirs 1 was too high, high temperature refrigerant superheat state occurred by compressor 2, might cause the damage of compressor 2.
Summary of the invention
The present invention is the invention that proposes in order to solve the problems referred to above that exist in the known conventional art, its objective is the apparatus for supercooling that a kind of central air-conditioning is provided, when the refrigerant temperature of subcooler discharge is higher than the proper temperature scope, the refrigerant of subcooler discharge, the discharge side that compressor is delivered on the side, prevent that high temperature refrigerant from flowing into compressor.
For the attainment of one's purpose, solve the problem that exists in the known conventional art, the technical scheme that the apparatus for supercooling of central air-conditioning of the present invention is taked includes: carry out heat exchange with the refrigerant that flows to the indoor heat converter side from outdoor heat converter, reduce the subcooler of refrigerant temperature; Connect the discharge oral-lateral of subcooler and the recovery pipe arrangement of fluid reservoir input side coolant piping; It is characterized in that also including:, the overheated pipe arrangement that compressor is discharged the side coolant piping is delivered on a part of refrigerant side from along reclaiming the mobile refrigerant of pipe arrangement; Be arranged on subcooler and discharge the coupling part that side reclaims pipe arrangement and overheated pipe arrangement, by the path of detected temperatures sensor control conversion refrigerant, the refrigerant that allows subcooler discharge flows to the valve that reclaims pipe arrangement or overheated pipe arrangement.
In order to achieve the above object, the apparatus for supercooling of central air-conditioning of the present invention is characterized in that: comprise with the refrigerant that flows to the indoor heat converter side from outdoor heat converter and carry out heat exchange, reduce the subcooler of refrigerant temperature; Connect the discharge oral-lateral of subcooler and the recovery pipe arrangement of fluid reservoir input side coolant piping; Connect the discharge side of subcooler and the overheated pipe arrangement that compressor is discharged the side coolant piping; Be separately positioned on and reclaim on pipe arrangement or the overheated pipe arrangement, control the valve that the path that reclaims pipe arrangement or overheated pipe arrangement is opened and closed by the detected temperatures sensor.
Advantage and good effect: the apparatus for supercooling of central air-conditioning of the present invention, when the refrigerant temperature of subcooler discharge is higher than the proper temperature scope, the refrigerant that can discharge subcooler, the discharge side that compressor is delivered on the side have prevented that high temperature refrigerant from flowing into compressor and making compressor take place overheated and damage and simple in structure being convenient to implemented.
Description of drawings
Fig. 1 is the central air-conditioning schematic diagram of the present invention the 1st embodiment.
Fig. 2 is the 1st an embodiment central air-conditioning block diagram of the present invention.
Fig. 3 is in the off-premises station of the present invention the 1st embodiment, when apparatus for supercooling is in normal temperature range, and refrigerant flow path schematic diagram.
Fig. 4 is in the off-premises station of the present invention the 1st embodiment, when apparatus for supercooling is in the overtemperature scope, and refrigerant flow path schematic diagram.
Fig. 5 is the central air-conditioning block diagram of the present invention the 2nd embodiment.
Fig. 6 is the block diagram of conventional art central air-conditioning off-premises station.
Fig. 7 is the block diagram of conventional art apparatus for supercooling.
The explanation of accompanying drawing critical piece:
11,12,13,14: indoor set 21,22: off-premises station
51: indoor heat converter 54: indoor electromagnetic expanding valve
61: fluid reservoir 62: variable speed compressor
63: constant speed compressor 64: separator
65: four-way valve 66: capillary
70: outdoor heat converter 74: outdoor electromagnetic expanding valve
80: apparatus for supercooling 82: subcooler
84: the other pipe 85 of providing and delivering: check valve
86: electromagnetic expanding valve 87: reclaim pipe arrangement
88: overheated pipe arrangement 89: valve
101,102,103,104,105,106: temperature sensor
110: drier 188: overheated pipe arrangement
189: valve
The specific embodiment
Below, with reference to accompanying drawing, most preferred embodiment of the present invention is elaborated.
Fig. 1 is the central air-conditioning schematic diagram of the present invention the 1st embodiment.Fig. 2 is the 1st an embodiment central air-conditioning block diagram of the present invention.Fig. 3 is in the off-premises station of the present invention the 1st embodiment, when apparatus for supercooling is in normal temperature range, and refrigerant flow path schematic diagram.Fig. 4 is in the off-premises station of the present invention the 1st embodiment, when apparatus for supercooling is in the overtemperature scope, and refrigerant flow path schematic diagram.
As shown in Figure 1, 2, central air-conditioning of the present invention is made of the off- premises station 21,22 that is arranged on many indoor indoor sets of building 11,12,13,14 and be connected with indoor set 11,12,13,14. Indoor set 11,12,13,14 is connected by coolant piping 30,40 with off-premises station 21,22.Carry out work during a certain at least needs in indoor set 11,12,13,14 of off-premises station 21,22.The refrigeration of indoor set 11,12,13,14, to heat the power increase big more, and the working quantity of off- premises station 21,22 and the compressor operating quantity that is arranged in the off- premises station 21,22 increase.
Here, indoor set 11,12,13,14 comprises the indoor heat converter 51 that allows refrigerant and room air carry out heat exchange, near the indoor blower 52 that be arranged on the indoor heat converter 51, allows room air circulate, when freezing, the indoor expansion valve 54 that allows the refrigerant that flow to indoor heat converter 51 expand.
As shown in Figure 2, the fluid reservoir 61 that off- premises station 21,22 comprises from the refrigerant of indoor set supply, only extracts gas coolant, discharges, suck gaseous coolant that fluid reservoir 61 extracts, it is carried out compressor for compressing 62,63, be connected, select the four-way valve 65 of the path of compression refrigerant with compressor 62,63, allow the refrigerant of four-way valve 65 supplies and the outdoor heat converter 70 that outdoor air carries out heat exchange.
Here, compressor 62,63 is by the variable speed compressor 62 that can change compression horsepower, and constant speed compressor 63 formations certain to the compression horsepower of refrigerant.Connect on the pipe arrangement of compressor 62,63 and four-way valve 65, be provided with separator 64, separator 64 is connected the suction side of compressor 62,63.
Particularly, separator 64 is isolated lubricating oil from the refrigerant that compressor 62,63 is discharged, and separated lubricating oil is supplied in the compressor 62,63, allows the Machinery Ministry of compressor 62,63 keep certain lubricants capacity.Separator 64 is connected by capillary 66 with the suction side pipe arrangement of compressor 62,63, and lubricating oil flows by capillary 66.
In addition, at the refrigerant water conservancy diversion that outdoor heat converter 70 is discharged to the coolant piping of indoor heat converter 51, be provided with the electromagnetic expanding valve 74 that when heating, allows refrigerant expand, and the refrigerant when freezing, to flowing to indoor heat converter 51, the apparatus for supercooling 80 that cools off.
Here, outdoor electromagnetic expanding valve 74 time is opened to greatest extent in refrigeration, allows refrigerant, the state flow mistake not expand of outdoor heat converter condensation; When heating, open by certain openness, allow the refrigerant of condensation in the indoor heat converter 51, between inflow outdoor heat exchanger 70, be inflated into the liquid of spray regime.
In addition, apparatus for supercooling 80 includes: the subcooler 82 of encircling coolant piping 30 parts; Penetrate cooler 82, be connected the coolant piping 30 that is connected with indoor heat converter ", in the refrigerant that is flowing in coolant piping 30 inside, the other other pipe 84 of providing and delivering of delivering to subcooler 82 inside of a part of refrigerant; Be arranged on the electromagnetic expanding valve 86 on the other pipe 84 of providing and delivering; The recovery pipe arrangement 87 that connects subcooler 82 and fluid reservoir 61 input side coolant pipings 61 '; Connect to reclaim pipe arrangement 87 and compressor 62,63 is discharged side lines 62 " overheated pipe arrangement 88; Be arranged on and reclaim pipe arrangement 87 and the position that overheated pipe arrangement 88 is connected, press the refrigerant temperature that subcooler 82 is discharged, the flow direction of refrigerant is transformed into the valve 89. that reclaims pipe arrangement 87 or overheated pipe arrangement 88
Here, the inside of subcooler 82 is formed with the space.Coolant piping 30 penetrates cooler 82.The refrigerant that flows along coolant piping 30 when air-conditioning freezes operation, carries out heat exchange with the refrigerant of subcooler 82 inside, and its temperature is reduced.
For this reason, 86 pairs of electromagnetic expanding valves are managed 84 refrigerants that flow to subcooler 82 by the side delivery and are expanded, and make it to be transformed into the low-temp low-pressure liquid coolant of spray regime.The refrigerant that expands is filled in the inside of subcooler 82, carries out heat exchange with the refrigerant that flows along coolant piping 30.
For to the refrigerant of apparatus for supercooling 80 suction/discharges, carry out temperature detection, discharge side coolant piping 30 at subcooler 82 " and the other pipe 84 of providing and delivering in be arranged on the other pipe 86 of providing and delivering that electromagnetic expanding valve 86 is discharged sides " and reclaim on the pipe arrangement 87 ' that is arranged in the pipe arrangement 87 between subcooler 82 and the valve 89, be provided with the temperature sensor 101,102,103 that refrigerant temperature is measured.
Meanwhile, on the discharge side coolant piping of compressor 62,63, be provided with the temperature sensor 104,105 that refrigerant temperature that compressor 62,63 is discharged detects.On the input side coolant piping of fluid reservoir 61, be provided with the temperature sensor 106 that the refrigerant temperature that flows into fluid reservoir 61 is detected.
Here, the temperature that valve 89 is measured according to temperature sensor 103, the refrigerant flow direction of selecting subcooler 82 to discharge.
That is, the refrigerant temperature that subcooler 82 is discharged, when being in the normal temperature range, the valve 89 open coolant paths that are connected with recovery pipe arrangement 87 cut off the path that is connected with overheated pipe arrangement 88.When the refrigerant temperature of subcooler 82 discharges exceeded normal temperature range, valve 89 cut off and reclaims the path between the pipe arrangement 87, the path between opening and the overheated pipe arrangement 88 in order to prevent the damage of compressor 62,63.
Here, on overheated pipe arrangement 88, be provided with check valve 85.Check valve 85 prevents that the refrigerant that compressor 62,63 is discharged from flowing backwards to subcooler 82 sides.
At coolant piping 30 " on, be provided with and remove coolant piping 30 " drier 110 of inner moisture.Flow through the refrigerant of drier 110, at coolant piping 30 " in given by the side, to indoor heat converter 51 side flow.
Below, with reference to Fig. 3, Fig. 4 the operation principle of off-premises station apparatus for supercooling of the present invention is elaborated.
At first, the central air-conditioning situation of carrying out refrigerating operaton when the refrigerant of apparatus for supercooling 80 is in normal temperature range describes.The refrigerant that compressor 62,63 is discharged flows through four-way valve 65, inflow outdoor heat exchanger 70, is condensed.In outdoor heat converter 70, obtain the refrigerant of condensation, flow to apparatus for supercooling 80.
Here, when central air-conditioning carries out refrigerating operaton, obtain the refrigerant of condensation in outdoor heat converter 70, its temperature is low more, and the efficient of refrigerating circuit is high more.Therefore, apparatus for supercooling 80 cooled off it before the refrigerant of condensation flows into indoor set 11.
Flow through in the refrigerant of subcooler 82, part refrigerant is at coolant piping 30 " in obtain shunting; under electromagnetic expanding valve 86 effects that are arranged at the other pipe 84 of providing and delivering, be inflated into the low-temp low-pressure liquid refrigerants, the liquid refrigerants that is inflated is filled in the inside of subcooler 82.
Be filled in the refrigerant of subcooler 82 inside, with the refrigerant that flows along the coolant piping 30 that penetrates cooler 82 inside, carry out heat exchange, reduce the refrigerant temperature that is in condensing state of coolant piping 30 inside.
In addition, be arranged on the temperature sensor 101,102,103 of apparatus for supercooling 80, refrigerant temperature to apparatus for supercooling 80 inside carries out perception. in each temperature sensor, be arranged on subcooler 82 and reclaim the refrigerant temperature that the temperature sensor 103 on the pipe arrangement 87 ' is measured, when being in the normal temperature range, the refrigerant that valve 89 allows subcooler 82 discharge flows to fluid reservoir 61.
Flow into the refrigerant in the fluid reservoir 61, flow to compressor 62,63, carry out flow process repeatedly.
Next, as shown in Figure 4, when central air-conditioning is in superheat state at the refrigerant of apparatus for supercooling 80, carry out under the situation of refrigerating operaton, situation when being in normal temperature range is compared, except that the action of valve 89 there are differences, the flow process of other workflows when being in normal temperature range was identical.
That is, when the temperature that temperature sensor 103 is measured exceeds normal temperature range, the path between valve 89 cut-outs and the fluid reservoir 61, the path between connection and the overheated pipe arrangement 88 makes refrigerant flow to overheated pipe arrangement 88.
Flow to the refrigerant of overheated pipe arrangement 88, flow to the discharge side line 62 of compressor 62,63 " after, flow through four-way valve 65, flow to outdoor heat converter 70 once more.
Here, if overheated refrigerant flows into fluid reservoir 61, then fluid reservoir 61 and the compressor 62,63 that is connected with fluid reservoir 61 under the influence of overheated refrigerant, be in superheat state.And compressor 62,63 is when being in superheat state, the structural member of its compression refrigerant owing to hot sticky temperature when high the phenomenon of bonding produce damage.
In addition, when the path of overheated refrigerant was communicated with certain hour with indoor heat converter 70, under the effect of the electromagnetic expanding valve 86 of apparatus for supercooling 80, the temperature of subcooler 82 descended gradually.When the refrigerant temperature of subcooler 82 discharges fell back in the normal temperature range, valve 89 cut off the path that is connected with overheated pipe arrangement 88, opened and reclaim the path that pipe arrangement 87 is connected.
Fig. 5 is the central air-conditioning block diagram of the present invention the 2nd embodiment.
As shown in Figure 5, the 2nd embodiment of the present invention compares with the 1st embodiment, overheated pipe arrangement with reclaim pipe arrangement and be not connected, directly with the subcooler connection outside identical with the 1st embodiment.
Here, overheated pipe arrangement 188 directly is connected with the discharge side of subcooler 82; On overheated pipe arrangement 188, be provided with the valve 189 that the control refrigerant flows separately.
When the refrigerant temperature of subcooler 82 discharges was in the normal range (NR), the valve 189 that is arranged on overheated pipe arrangement 188 was in closed condition, was in open state and be arranged on the valve 89 that reclaims on the pipe arrangement 87.
When the refrigerant temperature of subcooler 82 discharges exceeded normal range (NR), the valve 189 that is arranged on overheated pipe arrangement 188 was in open state, was in closed condition and be arranged on the valve 89 that reclaims on the pipe arrangement 87.
The 2nd embodiment course of work is identical with the 1st embodiment, therefore omits its detailed description.
Claims (4)
1. the apparatus for supercooling of a central air-conditioning includes: carry out heat exchange with the refrigerant that flows to the indoor heat converter side from outdoor heat converter, reduce the subcooler of refrigerant temperature; Connect the discharge oral-lateral of subcooler and the recovery pipe arrangement of fluid reservoir input side coolant piping; It is characterized in that: also include: from along reclaiming the mobile refrigerant of pipe arrangement, the other overheated pipe arrangement of delivering to compressor discharge side coolant piping of a part of refrigerant; Be arranged on the connecting portion that reclaims pipe arrangement and overheated pipe arrangement, by the path of temperature sensor control conversion refrigerant, the refrigerant that allows subcooler discharge flows to the valve that reclaims pipe arrangement or overheated pipe arrangement.
2. the apparatus for supercooling of central air-conditioning according to claim 1 is characterized in that: on the discharge oral-lateral of subcooler, be provided with the temperature sensor that the refrigerant temperature that flows to the recovery pipe arrangement is detected; The temperature that above-mentioned valve detects according to temperature sensor, switched path.
3. the apparatus for supercooling of central air-conditioning according to claim 1 and 2 is characterized in that: on the above-mentioned overheated pipe arrangement, also be provided with the check valve that prevents coolant backflow.
4. the apparatus for supercooling of a central air-conditioning, it is characterized in that: it includes: carry out heat exchange with the refrigerant that flows to the indoor heat converter side from outdoor heat converter, reduce the subcooler of refrigerant temperature; Connect the discharge oral-lateral of subcooler and the recovery pipe arrangement of fluid reservoir input side coolant piping; Connect the discharge oral-lateral of subcooler and the overheated pipe arrangement that compressor is discharged the side coolant piping; Be separately positioned on above-mentioned recovery pipe arrangement or the overheated pipe arrangement, control the valve that the path that reclaims pipe arrangement or overheated pipe arrangement is opened and closed by temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510015465A CN1952531B (en) | 2005-10-17 | 2005-10-17 | Overcooling device for central air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510015465A CN1952531B (en) | 2005-10-17 | 2005-10-17 | Overcooling device for central air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1952531A CN1952531A (en) | 2007-04-25 |
| CN1952531B true CN1952531B (en) | 2010-05-12 |
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ID=38058989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200510015465A Expired - Fee Related CN1952531B (en) | 2005-10-17 | 2005-10-17 | Overcooling device for central air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1952531B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110131917A (en) * | 2019-04-19 | 2019-08-16 | 三菱重工海尔(青岛)空调机有限公司 | A kind of air-conditioning with long-time frost-free or holding heating operation defrosting |
| CN112475599A (en) * | 2020-11-17 | 2021-03-12 | 莫祖龙 | Auxiliary gas injection device for laser processing |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502029A (en) * | 2001-02-05 | 2004-06-02 | �Ѻ͵繤��ʽ���� | Duplex-type heat exchanger and refrigeration system equipped with said heat exchanger |
-
2005
- 2005-10-17 CN CN200510015465A patent/CN1952531B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502029A (en) * | 2001-02-05 | 2004-06-02 | �Ѻ͵繤��ʽ���� | Duplex-type heat exchanger and refrigeration system equipped with said heat exchanger |
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| Publication number | Publication date |
|---|---|
| CN1952531A (en) | 2007-04-25 |
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Granted publication date: 20100512 Termination date: 20111017 |