CN1158972A - Refrigerator system for use in shop - Google Patents
Refrigerator system for use in shop Download PDFInfo
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- CN1158972A CN1158972A CN 96102801 CN96102801A CN1158972A CN 1158972 A CN1158972 A CN 1158972A CN 96102801 CN96102801 CN 96102801 CN 96102801 A CN96102801 A CN 96102801A CN 1158972 A CN1158972 A CN 1158972A
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- shop
- screw compressor
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- chiller system
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/22—Refrigeration systems for supermarkets
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- Applications Or Details Of Rotary Compressors (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
Disclosed is a refrigerator system for stores, which can be operated with corresponding load capacity. The system can precisely control the cabinet temperature fluctuation to the minimum, reduce noise and space and is favorable in trial operation, maintenance and troubleshooting. A screw compressor without reciprocating motion is adopted. The compressor is arranged in a machine room, which controls the rotating speed through detecting operating suction pressure and changing converter frequency. Malfunction can be judged, for example, the temperature of the converter rises abnormally. The system can be switched over to a commercial power supply during malfunction. Pressure and temperature of every part reflecting the operation status as well as the reasons of abnormal stop are displayed through figures.
Description
The present invention relates to a kind of chiller system that is used for the shop; More particularly, relate to a kind of chiller system that when the showcase (refrigerator) of 5 to 7 low capacities is connected in a refrigerator, is suitable for, seen in convenience shop.
Cite an actual example, disclose at Japan Patent and to have described a system among the unsettled 60-175970, in this system, outdoor an Air-cooled Condenser part is housed, a compressor section is housed in indoor Machine Room, and control its capacity by changing compressor rotary speed, to suppress the reduction of its refrigeration output with a converter.
Many prior art chiller system all use a converter and one with reciprocating reciprocating compressor, but following problems is all arranged.
(1). because the torque of compressor often fluctuation inherently, so when it during with low-frequency operation, it is lost inertia force sometimes and causes stopping.And when it moved with high frequency, then it made compressor discharge the temperature anomaly ground rising of gas sometimes, or excessive stress is acted on the compressor interior dump valve and inlet valve.Therefore, it can not move with high accuracy in the range of capacity of broadness fully and critically;
(2) although. it is big that the high pressure of discharging from compressor is discharged gas pulsation, still further amplified this fluctuation when changing compressor rotary speed with converter sometimes.Therefore, when arranging refrigerant pipeline, there are many restrictions, in case in refrigerant pipeline, produce the mobile sound of refrigerant gas and the vibration of pipeline itself; With
(3) although. the vibration and noise of compressor itself is big, has further amplified this vibration and noise when changing its rotating speed with converter.Therefore, the Machine Room, in the installation in urban dwelling district, at the aspects such as operation at night, have many restrictions.
Therefore, the present invention's purpose is that this system can be equipped with a plurality of little refrigerated display cabinets by providing a chiller system that is used for the shop to solve the problems referred to above, for example during 5 to 7 showcases, operates according to the big load capacity of fluctuation; And can access energy-conservation effect; Can critically control to minimum to the temperature fluctuation in the cabinet; Can reduce noise and space; And help trial run, maintenance and handling failure.
In order to achieve the above object, a creative refrigerator that is used for the shop is to comprise: as a most important characteristic, and at least 3 or more a plurality of refrigerator, they are loaded in the shop and its in-cabinet temperature maintains about 2 ℃; The ingressive refrigerator-freezer of people, it is loaded on the shop backyard, and its in-cabinet temperature maintains about 5 ℃; A screw compressor and a driver that is used under convertor controls, driving it, it is loaded in the contiguous Machine Room, shop; A heat exchanger, it is loaded on the outside in shop; A pipe-line system that is used to constitute a refrigerant cycles, its constructive method are that each refrigerator, the ingressive refrigerator-freezer of people, screw compressor and outdoor heat converter are sequentially coupled together; A receiver is loaded on the downstream of the outdoor heat converter of refrigerant cycles; A liquid injecting tube is used for a discharge chambe of the inside of receiver or downstream and screw compressor is coupled together; A control valve for fluids is loaded on the liquid injecting tube, is used for controlling the liquid injection rate; A controller is used for correspondingly controlling its control valve with the screw compressor effluent air temp; With a switch valve, be loaded on each pipeline, be used for refrigerant is guided into each refrigerator.
Preferably, marketing activity was carried out in the shop in the time more than 2/3 in one day.
In addition, controller is preferably controlled control valve for fluids like this, so that the refrigerant degree of superheat in compressor downstream becomes constant.
One end of liquid injecting tube preferably opens wide, just one from a certain position in the circle bag (wrap) of screw compressor outlet, be communicated with discharge chambe.
Preferably, the width of refrigerator is 3 feet (1 yards), and 5 or a plurality of refrigerator are connected in a refrigerant cycles part.
Preferably, be used for that driver at drive compression machine under the convertor controls has definite converter fault and by power supply automatically being transferred to the device that is continued to move on the source power supply.
In addition, the driver of screw compressor preferably has a kind of like this device, and it removes to control rotating speed according to suction pressure, and removes to operate this screw compressor by adjusting this rotating speed.
Chiller system preferably has certain device, and it is used for operation conditions (pressure and temperature of each part, degree of superheat and rotating speed), the reason that stops and the reason that abends that numeral shows refrigerating system.
A kind of creative chiller system that is used for the shop comprises, at least 3 or 3 above refrigerators, and they are loaded in the shop, and its in-cabinet temperature maintains about 2 ℃; With an ingressive refrigerator-freezer of people, its in-cabinet temperature is kept about 5 ℃.This system as second feature, has a screw compressor, is loaded on to be arranged in the contiguous machine chamber of shop; A suction pressure detector is loaded on the suction side of screw compressor, is used for surveying the operation suction pressure; Be used to control the device of screw compressor rotating speed, its method is the frequency that changes converter according to the numerical value of suction pressure detector; A refrigerant cycles part is loaded on the outside in shop, comprises an Air-cooled Condenser, sequentially is connected in refrigerator, the ingressive refrigerator-freezer of people and screw compressor with pipeline; A receiver is loaded on the downstream of the Air-cooled Condenser of refrigerant cycles part; A liquid injecting tube is used for a discharge chambe of the inside of receiver or downstream and screw compressor is coupled together; A control valve for fluids is loaded on the liquid injecting tube, is used for controlling the liquid injection rate; Discharge the gas semiconductor thermometer for one, be used to detect the temperature that screw compressor is discharged gas; A high voltage detector is used to survey the screw compressor pressure of discharging side; Be used for controlling the device of control valve for fluids open angle according to the numerical value of discharging the gas semiconductor thermometer and the numerical value of high voltage detector; With some electromagnetic switch valves, be loaded on each pipeline, be used for refrigerant is directed to each refrigerator.
Preferably, the width of refrigerator is about 1 meter, and has 5 or 5 above refrigerators to be connected in the refrigerant cycles part.
Preferablely be, chiller system also comprises a kind of device, be used for determining the fault of converter, and when determining that with the device of this definite fault converter has broken down, be used for being continued operation on the source power supply by the screw compressor power supply automatically is connected to.
Preferablely be, chiller system has a kind of like this device, it with numeral show can represent at least operation conditions at the pressure and temperature of each part and the rotating speed of screw compressor; And the device that shows the stop reason and the reason that abends is arranged.
A kind of creationary chiller system that is used for the shop as the 3rd feature, comprises a refrigerator fuselage, is loaded in the Machine Room; A screw compressor, its rotating speed and liquid injection rate are subjected to a convertor controls; At least 3 or 3 above refrigerators; The ingressive refrigerator-freezer of people; A pipeline that cooling agent is directed to refrigerator; With a switch valve that can be connected in refrigerator pipeline.
According to the present invention as mentioned above, provide following operation:
(1) make torque ripple little owing to screw compressor being used for chiller system, so even with the low frequency operation, the screw compressor that also can not stop, even and with high-frequency operation, do not have problem yet.Therefore, it can stably control its capacity in the scope of broadness.In addition, it can critically move with high accuracy the big capacity of fluctuation range, and method is by detecting the operation suction pressure and change converter frequency, removing to control the rotating speed of screw compressor.In addition, because the little compressor of the original fluctuation of its torque is housed, and change rotating speed in the Machine Room of special use, so can reduce the vibration and the noise of whole chiller system with converter.Also have because the pulsation of the gases at high pressure of discharging from compressor is little, so the vibration of the mobile sound of the refrigerant gas that in refrigerant pipeline, produces and pipeline itself just can reduce, thereby the restriction during minimizing refrigerant pipeline layout.In addition, because injecting the amount of fluid of the discharge chambe of compressor is controlled by the temperature of discharge gas and the detection of pressure, and the position of injection refrigerant fluid is the discharge chambe place that is communicated with the screw compressor outlet, so can be when keeping the refrigeration capacity, obtain stable effluent air temp, and do not reduce soakage, and until higher frequency heat only from the refrigerant gas of compressor suction side;
(2) because chiller system is equipped with the device that is used to measure the converter fault, with the device that is used to continue to move, its method is when determining that with determinator converter has broken down, the screw compressor power supply is connected in source power supply, and when converter breaks down, power supply automatically is connected in source power supply, so though can not control temperature continuously, but can keep required minimum refrigeration operation, thereby can avoid the product that is stored in the showcase is exerted an adverse impact;
(3) be the operational mode of fixing because a kind of its frequency is provided in the driver of screw compressor, so with its running frequency is to compare with the operational mode that normal suction pressure becomes, just can easily carry out some maintenances, for example the variable expansion valve and the refrigerant etc. of packing between trial run period.
(4) because operation conditions is shown, so, can prevent fault by making regular check on chiller system in advance.In addition, because abend or the similar reason that stops to be shown,, for example confirm that whether suitable range of operation etc. so carry out the maintenance of chiller system easily.
Can be clear that characteristic of the present invention from following description and accompanying drawing, and other purposes, application and advantage thereof.
Fig. 1 is the top view that an embodiment according to a chiller system of inventing for shop applications illustrates whole configuration;
Fig. 2 is a side view that whole configuration is described according to one embodiment of the invention;
Fig. 3 is a calcspar that the refrigerant cycles part-structure is described according to one embodiment of the invention;
Fig. 4 is the flow chart of the operation summary of a suction pressure that is used to control the refrigerant cycles part according to one embodiment of the invention explanation;
Fig. 5 is one the calcspar of proceeding method of operating when converter breaks down is described according to one embodiment of the invention;
Fig. 6 is a side view that screw compressor ancillary equipment is described according to one embodiment of the invention;
Fig. 7 is a front view that the display pannel details is described according to one embodiment of the invention;
Fig. 8 is a sectional drawing, and the engagement state of screw compressor inside spin covering is described, and the relation between the position of spiral covering that is used to inject liquid refrigerant and hole.
Concepts more of the present invention can be made a summary as follows.
(1) adopts a kind of reciprocating screw compressor that do not have. Its driving method be by Detect the operation suction pressure and change converter frequency and control its rotating speed. It is loaded on one specially If the Machine Room in.
(2) correspondingly control liquid injection with screw compressor effluent air temp and force value Amount. Near the discharge chambe outlet of liquid refrigerant injection, at screw compressor Once the rotatablely moving of rotating screw covering during, interconnect once.
(3) creative this refrigerant system can be differentiated fault, for example the converter temperature The unusual rising, and when so a kind of fault takes place, can receive the power supply of screw compressor On the source power supply.
(4) provide a kind of when fixed rotating speed, the pattern of operate compressor; And
(5) rotating speed of the pressure of each part and temperature and screw compressor is as fortune at least Row situation and adopt numeral to show, and in addition, also why display operation stops Reason and the reason that abends.
Specify a preferred embodiment of the present invention below with reference to the accompanying drawings.
Fig. 1 is the top view of the whole configuration of a chiller system of the present invention that is used for the shop, and Fig. 2 is its side view, and Fig. 3 is the calcspar from control relation explanation refrigerant cycles part-structure.
Commodity are stored in 6 refrigerators 2, and these cabinets are loaded in the shop 1,1 meter the width of having an appointment.In-cabinet temperature maintains about 2 ℃.
Backyard in the shop is equipped with an ingressive refrigerator-freezer 3 of people, and the people can enter into wherein, and commodity also can be stored in wherein, and about in-cabinet temperature maintains ℃.Should be pointed out that from the efficient aspect and it seems, need to connect at least 3 or 3 above refrigerators 2, also need in one day and operate chiller system in the time more than 2/3, so that carry out marketing activity in (for example, 7A.M to 23P.M) during this period of time.In contiguous Machine Room 4, shop a spiral refrigerator 100 that a screw compressor 10 is housed has been installed, He Yitai is used for the driver 200 of drive compression machine under convertor controls.An Air-cooled Condenser 20 is housed in the outside in shop.Attempt is by installing its torque little screw compressor 10 that just fluctuateed originally in Machine Room 4, reduce the noise of directive outside and help safeguarding.Refrigerant cycles partly comprises refrigerator 2,3, one accumulators 60 of the ingressive refrigerator-freezer of people, and screw compressor 10, Air-cooled Condenser 20 and a receiver 30 of installing in the downstream of Air-cooled Condenser 20, they sequentially are connected to each other.The inside of receiver 30 or downstream are connected in a discharge chambe (not shown) of screw compressor 10 by a fluid injector 85.A control valve for fluids 80 and an electromagnetic control valve 70 that is used for controlling the amount of fluid of injecting screw compressor 10 is housed, when screw compressor 10 is shut down or when power supply was cut off, valve 70 was closed on liquid injection-tube 85.
Pressing the chiller system and the refrigerant cycles part of arranging as mentioned above, the low temperature and pressure refrigerant gas of evaporation in refrigerator 2 and the ingressive refrigerator-freezer 3 of people, flow through the accumulator 60 that is loaded in the Machine Room 4, and be compressed into high pressure refrigerant gas by screw compressor 10.Because it is little at this moment to pulse from the gases at high pressure of screw compressor 10 discharges, so can reduce the mobile sound of the refrigerant gas of generation in the pipeline and the vibration of pipeline itself.With the Air-cooled Condenser 20 that be contained in outside shops refrigerant gas be condensed into refrigerant liquid, and it temporarily existed in receiver 30 thereafter.Then, by refrigerant liquid pipeline 33 and the expansion valve 36 that flows through electromagnetic switch valve 35, refrigerator 2 and the people ingressive refrigerator-freezer 3 of refrigerant liquid supply, thereby form a circulatory system, and produce cold air as evaporimeter.
Below with reference to flow chart shown in Figure 4, illustrate to be used for the operation summary of the suction pressure of refrigerant cycles part in the control chart 3.When the capacity constant of compressor with when the required load of evaporimeter becomes big, that is, when the temperature of refrigerator 2 and the ingressive refrigerator-freezer 3 of people rose, then the suction pressure during compressor operating increased.And when they by sub-cooled, and load is when diminishing, then the suction pressure step-down.Therefore, might carry out a kind of capacity controlled operation, by this operation, can correspondingly change the cooling capacity of refrigerator with load, method is by detecting the rotating speed that suction pressure changes compressor.
In step 401, in the controller 201 of operation suction pressure input that detects by a suction pressure detector 91.At this, it and a set pressure value (Psb) that is provided with are in advance compared, and in step 403, it has a poor (scope of (△ Ps) of the set pressure that can allow.When it during greater than them, that is, when it is in (A) district of this scope, just the instruction of a running frequency is outputed in the converter 202, so that improve this running frequency in step 405.Should be pointed out that and the upper limit of frequency is arranged to 80Hz in step 404 and 406.Then, converter 202 produces a power supply that has by the frequency of controller 201 indications, and it is supplied with screw compressor 10, controlling it, thereby reaches the purpose that improves rotating speed.
And when it during less than the force value that presets (Psb), that is, and when it is in (C) district, in contrast, just in step 409 reduction running frequency.Should be pointed out that in step 408 and 406 lower-frequency limit is placed 20Hz.When operation suction pressure when being in the scope that can allow, that is, when (B) distinguishes, just keep at this moment frequency in step 406.Set pressure value (Psb) that sets in advance and set pressure poor (△ Ps) automatically change, method is the temperature that detects in the shop that refrigerator 2 and the ingressive refrigerator-freezer 3 of people are housed, with the temperature of the outside shops that Air-cooled Condenser 20 is housed, so that all realize stable and operation efficiently in the whole year of environmental change.
The following describes the control of the effluent air temp of refrigerant cycles part among Fig. 3.Comprise oil because have the refrigerator of screw compressor 10 in the discharge side, thus must be superheated to certain degree to it, to keep oil viscosity.If discharge pressure is constant, then only need control to discharge the temperature of gas.Yet, because discharge pressure changes along with operation suction pressure, running frequency and outside air temperature, thus must control to this temperature low as far as possible, and do not want overheated too much.Then, controller 201 calculates the degree of superheat of refrigerant, and this depends on a kind of by the relation of discharging between effluent air temp that gas semiconductor thermometer (hygrosensor) surveyed and the pressure of being surveyed by high voltage detector 92.Correspondingly change the open angle of control valve for fluids 80 with degree of superheat, inject the liquid refrigerant quantity (liquid injection rate) of screw compressor 10 with control.When refrigerant by overheated when too many, the temperature of discharging gas just is lowered by increasing the liquid injection rate, and is controlled to a suitable temperature, and does not reduce its refrigeration output.Except specific CFC, it can also use CFC 22, and needn't use special CFC.
Fig. 8 is the location drawing in a spiral covering hole of using about injecting fluid refrigerant in screw compressor 10, there is a hole 141a who is used for injecting fluid refrigerant to be loaded on a minute surface 115 among the figure, its installation site is that within the first lap that fixedly spiral covering 110 winding initiating terminals are counted (line angle degree term is within 2 π with edging up) arranged, fixedly near spiral covering 110 neighboring.Another hole 141b that is used for injecting fluid refrigerant also is loaded on this minute surface, and its position is near an inner rim of fixing spiral covering 110, promptly advances 2 π from hole 141a.By the hole of above-mentioned position is provided, liquid refrigerant is injected 121a chamber and 121b thorax, all thoraxes are communicated with once with a tap 102 during a circular motion of spiral path parts 111.It can avoid the excessive liquid compression of refrigerant, thereby avoids the reduction of refrigeration capacity.
In addition, might prevent from the moisture compression or produce to report to the police, method is according to a kind of relation between sucking by the suction gas temperature that sucks 93 detections of gas semiconductor thermometer and by the operation that same way as detects, to calculate concerning the suction gas superheat degree of determining thus.
Though when the type of refrigerant is determined, can according to the degree of superheat of determining to discharge side and suction side as mentioned above by pressure and temperature, yet if the type difference of refrigerant, what under identical temperature and pressure, its degree of superheat would be also different.For this cause, just the eigenvalue of several refrigerant is imported in the controller 201 in advance so that can enough setting devices that resembles external switch and so on select this value, thereby even when refrigerant type not simultaneously, also can calculate correct degree of superheat.Therefore, even work as refrigerant type not simultaneously, also can control degree of superheat exactly.
Below with reference to Fig. 5, a kind ofly when having fault, converter also can continue method of operating even illustrate.
When converter 202 just often, electromagnetic contactor 203 and 204 is switched on, and electric power supplies with a motor that is used for screw compressor 10, thereby controls it.As can be known, when converter 202 itself when controller 201 sends an abnormal signal, for example when the temperature anomaly of converter 202 raises, send an operating instruction though perhaps work as controller 201 to converter 202, but when a current detector that is loaded on converter 202 secondary sides can not detect electric current, a fault just took place in converter 202.Subsequently, electromagnetic contactor 203 and 204 is disconnected, and electromagnetic contactor 205 is switched on, so that source power supply is directly supplied with the motor of screw compressor 10.As a result, though can not control operation, can keep operation at least.
Fig. 6 illustrates the ancillary equipment of screw compressor 10 in the compressor assembly 100, it is equipped with a digital display floater 207 on an electric component box (driver) 200, controller 201 is housed, converter 202 in case, electromagnetic contactor 203,204 and 205 and current detector 206.
Fig. 7 illustrates the details of digital display floater 207, and code 208 and data 209 wherein are provided, as digital display items; Options button 210 also is housed, is used to select display items.Show operation conditions (each force value of set pressure, discharge pressure and suction pressure by handling options button 210 by data 209 numerals, each temperature value of temperature and outdoor temperature in effluent air temp, suction gas temperature, the shop, discharge each degree of superheat value of gas refrigerant and suction gas refrigerant, running frequency value and running current value etc.).When a certain unusual condition took place, unusual lamp 211 brightened.Display can show the code of an explanation stop reason, and when it is stopped singularly, has the function that keeps operation conditions, is which protective device is operated so that allow to determine when being stopped under the operation of operation conditions at protective device.
As mentioned above, even when a plurality of small-sized refrigerator display cases are mounted, with when showcase and reserve temperature that some were connected, for instance, when the commodity that displayed owing to shop reconstruction or change altered a great deal, chiller system of the present invention also can correspondingly be moved with load capacity.It can also reach the effect of energy savings, because its suction pressure is constant in the always annual maintenance of refrigerator run duration.In addition, it can control to the temperature fluctuation in the statement cabinet minimum continuously, state that therefore the reserve temperature in the cabinet is stable, and the commodity of being preserved can keep fresh.Moreover it can realize reducing noise and reducing the space, because its torque little screw compressor that just fluctuateed originally is installed in the Machine Room.It also helps trial run, keeps in repair handling failure and demonstration operation conditions.
Though described a preferred embodiment of the present invention, the professional and technical personnel can do some changes to it in the concept and range of the present invention described in the following claims.
Claims (13)
1. chiller system that is used for the shop comprises:
At least 3 or more a plurality of refrigerator, they are loaded in the described shop, and its in-cabinet temperature remains on about 2 ℃;
The ingressive refrigerator-freezer of people, it is loaded on the backyard in described shop, and its in-cabinet temperature remains on about 5 ℃;
A screw compressor and a driver that is used under convertor controls, driving it, they are loaded on one and are arranged in the contiguous Machine Room, described shop;
A heat exchanger is loaded on the outside in described shop;
A pipeline that is used to constitute a refrigerant cycles, its constructive method are sequentially to connect described refrigerator, the ingressive refrigerator-freezer of described people, described screw compressor and described outdoor heat converter;
A receiver is loaded on the downstream of the described outdoor heat converter of described refrigerant cycles;
A liquid injection-tube is used for the discharge chambe of the inside of described receiver or a downstream and a described screw compressor is coupled together;
A flow control valve is contained on the described liquid injection-tube, is used to control the liquid injection volume;
A controller is used for correspondingly controlling described control valve with the effluent air temp of described screw compressor; And
A switch valve is loaded on each pipeline, is used for refrigerant is introduced each refrigerator.
2. the chiller system that is used for the shop according to claim 1, the merchandise sales activity in wherein said shop was carried out in the time more than 2/3 in one day.
3. the chiller system that is used for the shop according to claim 1, wherein said controller is controlled described flow control valve, so that the degree of superheat of the refrigerant in described compressor downstream becomes constant.
4. the chiller system that is used for the shop according to claim 1, an end of wherein said liquid injection-tube is opened, so that a certain position in a circle of a covering is connected with a compression chamber from a tap of described screw compressor.
5. the chiller system that is used for the shop according to claim 1, the width of wherein said refrigerator are 3 feet (1 yards), and have 5 or more a plurality of refrigerator to be connected in a refrigerant cycles part.
6. the chiller system that is used for the shop according to claim 1, wherein be used under convertor controls, driving the driver of described compressor, the device of determining described converter fault is arranged, and continued operation in a source power supply by automatically transferring.
7. the chiller system that is used for the shop according to claim 1, the described driver of wherein said screw compressor has the device of correspondingly controlling its rotating speed with suction pressure, and has by adjusting the device that rotating speed removes to operate described screw compressor.
8. the chiller system that is used for the shop according to claim 1, useful numeral shows the device of described chiller system operation conditions (each pressure, temperature, degree of superheat and rotating speed), stop reason and the reason that abends.
9. a chiller system that is used for the shop comprises at least 3 or more a plurality of refrigerator, and they are loaded in the shop, and its in-cabinet temperature remains on about 2 ℃, and comprises an ingressive refrigerator-freezer of people, and its in-cabinet temperature remains on about 5 ℃;
The described chiller system that is used for the shop also comprises:
A screw compressor is loaded on one and is arranged in the contiguous Machine Room, described shop;
A suction pressure detector is loaded on the suction side of described screw compressor, is used for surveying the operation suction pressure;
Be used to control the device of described screw compressor rotating speed, method is the frequency that changes converter according to described suction pressure probe value;
A refrigerant cycles part is loaded on outside shops, comprises an Air-cooled Condenser, and it sequentially is connected in described refrigerator, the ingressive refrigerator-freezer of described people and described screw compressor with a pipeline;
A receiver is loaded on the downstream of the described Air-cooled Condenser of described refrigerant cycles part;
A liquid injection-tube is used for the compression stroke of the inside of described receiver or downstream and described screw compressor is coupled together;
A flow control valve is contained on the described liquid injection-tube, is used to control the liquid injection volume;
A semiconductor thermometer of discharging gas is used to detect the temperature that described screw compressor is discharged gas;
A high voltage detector is used to detect the pressure of discharging the described screw compressor of side;
Be used for controlling the device of described flow control valve open angle according to the numerical value of described discharge gas semiconductor thermometer and described high voltage detector; And
Some electromagnetic switch valves are loaded on each pipeline, are used for refrigerant is directed to each refrigerator.
10. the chiller system that is used for the shop according to claim 9, the width of wherein said refrigerator is about 1 meter, and has 5 or more a plurality of refrigerator to be connected in described refrigerant cycles part.
11. the chiller system that is used for the shop according to claim 9, also comprise the fault and the device that is used to continue to operate that are used for determining described converter, its method is when the device of described definite fault determines that a fault has taken place described converter, and the power supply of described screw compressor is automatically transferred in a source power supply.
12. the chiller system that is used for the shop according to claim 9, have with numeral and show the temperature and the device of pressure and described screw compressor rotating speed at least, and the device that shows the stop reason and the reason that abends is arranged as each part of operation conditions.
13. a chiller system that is used for the shop comprises:
A refrigerator main body is loaded in the Machine Room;
A screw compressor, its rotating speed and liquid injection volume are by a convertor controls;
At least 3 or more a plurality of refrigerator;
The ingressive refrigerator-freezer of people;
A pipeline that is used for refrigerant is introduced described refrigerator; And
The switch valve that can be connected in described refrigerator described pipe-line system.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP71104/95 | 1995-03-29 | ||
| JP71104/1995 | 1995-03-29 | ||
| JP07110495A JP3186499B2 (en) | 1995-03-29 | 1995-03-29 | Store refrigeration equipment |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021406537A Division CN100429465C (en) | 1995-03-29 | 1996-03-29 | Refrigerator system for store |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1158972A true CN1158972A (en) | 1997-09-10 |
| CN1113202C CN1113202C (en) | 2003-07-02 |
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ID=13450919
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96102801 Expired - Fee Related CN1113202C (en) | 1995-03-29 | 1996-03-29 | Refrigerator system for use in shop |
| CNB021406537A Expired - Fee Related CN100429465C (en) | 1995-03-29 | 1996-03-29 | Refrigerator system for store |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021406537A Expired - Fee Related CN100429465C (en) | 1995-03-29 | 1996-03-29 | Refrigerator system for store |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3186499B2 (en) |
| CN (2) | CN1113202C (en) |
| TW (1) | TW312743B (en) |
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| JP3668842B2 (en) | 2001-02-27 | 2005-07-06 | 株式会社日立製作所 | Refrigeration equipment |
| JP4693502B2 (en) * | 2005-05-30 | 2011-06-01 | 株式会社ラックランド | Operation control system for refrigeration equipment |
| JP4624223B2 (en) * | 2005-09-20 | 2011-02-02 | 三洋電機株式会社 | Refrigeration system |
| JP2008136329A (en) * | 2006-11-29 | 2008-06-12 | Hitachi Appliances Inc | Refrigeration system |
| CN101413748A (en) * | 2007-10-17 | 2009-04-22 | 开利公司 | Complete machine show cabinet system |
| JP5999501B2 (en) * | 2012-11-30 | 2016-09-28 | パナソニックＩｐマネジメント株式会社 | Refrigeration equipment |
| US10240840B2 (en) | 2016-12-22 | 2019-03-26 | Emerson Climate Technologies, Inc. | Scroll unloading detection system |
| JP7386018B2 (en) * | 2019-09-09 | 2023-11-24 | ホシザキ株式会社 | cooling storage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60223966A (en) * | 1984-04-20 | 1985-11-08 | 三菱電機株式会社 | Refrigerator |
| JPS62116862A (en) * | 1985-11-15 | 1987-05-28 | 三菱電機株式会社 | Refrigerator |
| JPH0360396A (en) * | 1989-07-28 | 1991-03-15 | Toshiba Corp | Refrigerator unit |
| JPH03129255A (en) * | 1989-10-13 | 1991-06-03 | Hitachi Ltd | Freezer |
| JP3173843B2 (en) * | 1992-02-24 | 2001-06-04 | 東芝キヤリア株式会社 | Store system equipment |
| JP2533732B2 (en) * | 1993-07-19 | 1996-09-11 | 株式会社日立製作所 | Refrigeration equipment using scroll fluid machinery |
-
1995
- 1995-03-29 JP JP07110495A patent/JP3186499B2/en not_active Expired - Fee Related
-
1996
- 1996-03-26 TW TW85103630A patent/TW312743B/zh not_active IP Right Cessation
- 1996-03-29 CN CN 96102801 patent/CN1113202C/en not_active Expired - Fee Related
- 1996-03-29 CN CNB021406537A patent/CN100429465C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3186499B2 (en) | 2001-07-11 |
| TW312743B (en) | 1997-08-11 |
| CN1113202C (en) | 2003-07-02 |
| JPH08271063A (en) | 1996-10-18 |
| CN1445497A (en) | 2003-10-01 |
| CN100429465C (en) | 2008-10-29 |
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Granted publication date: 20030702 Termination date: 20140329 |