CN201463446U - Auto-cascade double-temperature refrigerator - Google Patents
Auto-cascade double-temperature refrigerator Download PDFInfo
- Publication number
- CN201463446U CN201463446U CN2009200911682U CN200920091168U CN201463446U CN 201463446 U CN201463446 U CN 201463446U CN 2009200911682 U CN2009200911682 U CN 2009200911682U CN 200920091168 U CN200920091168 U CN 200920091168U CN 201463446 U CN201463446 U CN 201463446U
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- evaporator
- temperature
- condenser
- refrigerator
- compressor
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Abstract
The utility model discloses an auto-cascade double-temperature refrigerator, comprising a compressor (21), a condensation evaporator (23), a cold room evaporator (34) and an electric control device (36), wherein, the condensation evaporator (23) is provided with a low pressure inlet (22C); a bypass pipeline (35) is arranged between the refrigerant pipeline in front of the inlet of the cold room evaporator (34) and the low pressure inlet (22C) of the condensation evaporator; and the bypass pipeline (35) is provided with an electromagnetic valve (33) which is connected with an electric control device. When the temperature of a refrigerating chamber is higher but the temperature of the cold room reaches the lower limit value, the electromagnetic valve is opened to reduce refrigerant flow passing through the cold room evaporator, so that the temperatures of two chambers of the refrigerator are both within preset ranges, thus avoiding the problem caused by mismatched temperature of two chambers.
Description
Technical field
The utility model relates to a kind of from the overlapping two-storage temperature refrigerator.
Background technology
The major control mode of two-storage temperature refrigerator has single control and two kinds of two controls at present.For the single control of two temperature refrigerator, refrigerating chamber and refrigerating chamber refrigerating capacity are to carry out nature by the size of each flash-pot to distribute, this has just caused refrigerating chamber and the area matched situation of difficult of freezer evaporator, the start-stop of compressor is controlled by refrigerating chamber only simultaneously, and refrigerating chamber and freezing chamber evaporator area are generally 25 ℃ of designs down in a certain specific environment temperature, therefore freezer temperature control is not accurate enough, the refrigerating chamber surfusion may appear when hot environment, when low temperature environment, the refrigerating chamber superheating phenomenon may occur, be difficult to satisfy wide climatic environment.
The refrigerating chamber of double temperature double control refrigerator and the temperature of refrigerating chamber are independently controlled by temperature controller respectively, overcome the shortcoming that the single control of two temperature refrigerator is difficult for coupling preferably.But in actual production and using, this double temperature double control mode is all controlled compressor because of freezing, two temperature controllers of refrigeration, sometimes a temperature controller just shuts down, another requires start again at once, increase because of the refrigeration system lack of equilibrium causes compressor start power, start difficulty and thermal protector action etc., influence the service life of compressor and annex thereof, frequently open, shut down, therefore power consumption also increase; In addition, the evaporating temperature that refrigerating chamber is low excessively also causes goods drying loss increase in the refrigerating chamber.
In order to solve the problems referred to above that traditional two-storage temperature refrigerator exists, as shown in Figure 1, one-level fractional condensation after having occurred in recent years improving is used for two-storage temperature refrigerator from the overlapping circulation, this refrigerator comprises compressor 1 and condenser/evaporator 8, and condenser/evaporator 8 is provided with high pressure import and export 8A, 8B and low pressure import and export 8C, 8D.The exhaust outlet of compressor 1 is communicated with condenser 2 and gas-liquid separator 3 successively by refrigerant line, and the bottom of gas-liquid separator 3 is communicated with first device for drying and filtering 4, first throttle device 5 and refrigerator evaporator 7 successively by refrigerant line; The top of gas-liquid separator 3 is connected with the high-pressure inlet 8A of condenser/evaporator 8 by refrigerant line, the high-pressure outlet 8B of condenser/evaporator 8 is communicated with successively by refrigerant line and is provided with second device for drying and filtering 9, second throttling arrangement 10 and freezer evaporator 11, the outlet of the outlet of freezer evaporator 11, refrigerator evaporator 7 is connected by the low pressure inlet 8C of threeway mixed node 12 with condenser/evaporator 8, and the low tension outlet of condenser/evaporator 8 is connected by the air entry of refrigerant line with compressor 1.In refrigerating chamber and refrigerating chamber, be equipped with temperature sensor 13, described temperature sensor 13 and an electric control gear 14 signal communication, electric control gear 14 is electrically connected with compressor 1.The flow direction of this refrigerator refrigerant is: mixed refrigerant stream overcompression machine 1, condenser 2, isolate through gas-liquid separator 3 and to be rich in low boiling point refrigerant stream and to be rich in higher boiling cold-producing medium stream, be rich in higher boiling cold-producing medium (liquid phase refrigerant in the gas-liquid separator 3) and flow through device for drying and filtering 4, throttling arrangement 5, hide chamber evaporimeter 7 and be mixed into condenser/evaporator low pressure inlet 8C with being rich in low boiling point refrigerant stream again, flow back to compressor 1 at last and form the circulation of higher boiling cold-producing medium; Be rich in low boiling point refrigerant (vapor phase refrigerant in the gas-liquid separator 3) and flow through second device for drying and filtering 9, second throttling arrangement 10, freezer evaporator 11 and be mixed into the low pressure inlet 8C of condenser/evaporator 8 and finally be back to compressor 1 with being rich in higher boiling cold-producing medium stream again, form the low boiling point refrigerant circulation.
But for such one from the overlapping two-storage temperature refrigerator; because the influence of factors such as separating effect; can not accurately calculate from what condenser/evaporator was separated and be rich in height; design parameters such as the flow of lower boiling two strands of cold-producing mediums stream and proportioning; the variation of operating mode simultaneously can have a significant impact two strands of refrigerant flows after separating and proportioning; so only rely on design to refrigerator evaporator area and freezer evaporator area; use the independent temperature control of refrigerating chamber to be difficult to realize the coupling of two room temperature degree; start compressor in the time of can occurring two room temperature degree equally and do not match the refrigeration system lack of equilibrium that is caused and cause compressor start power to increase; start problems such as difficulty and thermal protector action; influence the service life of compressor and annex thereof, high frequent is opened; shutting down has also increased power consumption.
The utility model content
The purpose of this utility model be to provide a kind of can change the refrigerating chamber refrigerant flow from the overlapping two-storage temperature refrigerator, the temperature of two chambers of this refrigerator is coupling more more.
For achieving the above object, of the present utility model from the overlapping two-storage temperature refrigerator, comprise compressor, condenser/evaporator and electric control gear, condenser/evaporator is provided with high pressure import and export and low pressure import and export; The exhaust outlet of compressor is communicated with condenser and gas-liquid separator successively by refrigerant line, and the bottom of gas-liquid separator is communicated with first device for drying and filtering, first throttle device and refrigerator evaporator successively by refrigerant line; The top of gas-liquid separator is connected with the high-pressure inlet of condenser/evaporator by refrigerant line, the high-pressure outlet of condenser/evaporator is communicated with successively by refrigerant line and is provided with second device for drying and filtering, second throttling arrangement and freezer evaporator, the outlet of freezer evaporator, the outlet of refrigerator evaporator is connected with the low pressure inlet of condenser/evaporator by the threeway mixed node, the low tension outlet of condenser/evaporator is connected with the air entry of compressor by refrigerant line, in refrigerating chamber and refrigerating chamber, be equipped with temperature sensor, a described temperature sensor and an electric control gear signal communication, electric control gear is electrically connected with compressor, it is characterized in that: be provided with bypass line between the refrigerant line before the refrigerator evaporator inlet and the low pressure inlet of condenser/evaporator, bypass line is provided with magnetic valve, and magnetic valve is connected with electric control gear.
As a kind of improvement of the present utility model, the refrigerant line before the compressor air suction mouth is provided with reservoir.
Of the present utility model have following advantage from the overlapping two-storage temperature refrigerator:
1. the setting of bypass line and magnetic valve, making can be controlled by the refrigerant flow of refrigerator evaporator, when the higher but temperature of refrigerating chamber of freezer temperature has reached lower limit, can opens solenoid valve to reduce refrigerant flow by refrigerator evaporator, thereby temperature of refrigerating chamber no longer descends or slightly rise when making freezer temperature continue to descend, the temperature regime that so just makes two chambers of refrigerator all within the scope of setting, the variety of issue of having avoided two room temperature degree in the past not match and caused.
2. having more than needed may appear in condenser/evaporator low temperature side cold in the magnetic valve unlatching process, may make the cold-producing medium that enters compressor be in the two-phase state like this, causes occurring the liquid hit phenomenon damage equipment.Refrigerant line before the compressor air suction mouth is provided with reservoir, has avoided liquid phase refrigerant to enter compressor, thereby has avoided liquid hit phenomenon.
Description of drawings
Fig. 1 is existing structural representation from the overlapping two-storage temperature refrigerator;
Fig. 2 is the structural representation from the overlapping two-storage temperature refrigerator of the present utility model;
Fig. 3 is the temperature-controlled process schematic diagram from the overlapping two-storage temperature refrigerator of the present utility model.
The specific embodiment
As shown in Figure 2, of the present utility model from the overlapping two-storage temperature refrigerator, comprise compressor 21 and condenser/evaporator 22, condenser/evaporator 22 is provided with high-pressure inlet 22A, high-pressure outlet 22B and low pressure inlet 22C, low tension outlet 22D; The exhaust outlet 21A of compressor 21 is communicated with condenser 23 and gas-liquid separator 24 successively by refrigerant line, and the bottom of gas-liquid separator 24 is communicated with first device for drying and filtering 25, first throttle device 26 successively by refrigerant line and is located at refrigerator evaporator 34 in the refrigerating chamber 37; The top of gas-liquid separator 24 is connected with the high-pressure inlet 22A of condenser/evaporator 22 by refrigerant line, the high-pressure outlet 22B of condenser/evaporator 22 is communicated with successively by refrigerant line and is provided with second device for drying and filtering 28, second throttling arrangement 29 and be located at freezer evaporator 30 in the refrigerating chamber 38, the outlet of freezer evaporator 30, the outlet of refrigerator evaporator 27 is connected by the low pressure inlet 22C of threeway mixed node 31 with condenser/evaporator 22, the low tension outlet 22D of condenser/evaporator 22 is connected with the air entry 21B of compressor 21 by refrigerant line, in refrigerating chamber 37 and refrigerating chamber 38, be equipped with temperature sensor 39, described temperature sensor 39 and an electric control gear 36 signal communication, electric control gear 36 is electrically connected with compressor 21, be provided with bypass line 35 between the refrigerant line before the refrigerator evaporator 34 and the low pressure inlet 22C of condenser/evaporator 22, bypass line 35 is provided with magnetic valve 33; Electric control gear 36 is electrically connected with magnetic valve 33. and be provided with reservoir 32. wherein on the refrigerant line before compressor 21 air entry 21B, first, second throttling arrangement 26,29 can be a capillary, also can be throttling devices such as choke valve.
As Fig. 3 and shown in Figure 2, the temperature-controlled process from the overlapping two-storage temperature refrigerator of the present utility model is:
Store the ceiling temperature T of refrigerating chamber in the described electric control gear 36
bWith lower limit temperature T
aAnd the ceiling temperature T of refrigerating chamber
dWith lower limit temperature T
cRefrigerator is opened back electric control gear 36 control compressors 21 and is brought into operation, and refrigerating chamber 37 is lowered the temperature but do not reduced to refrigerating chamber lower limit temperature T as yet
aAnd refrigerating chamber 38 is lowered the temperature but is not reduced to refrigerating chamber lower limit temperature T as yet
c, electric control gear 36 control this moment magnetic valves 33 cut out, compressor 21 continuous services.This moment, the circulation of system refrigerant was first kind of cyclic process: mixed refrigerant stream overcompression machine 21, condenser 23, isolate through gas-liquid separator 24 and to be rich in low boiling point refrigerant stream and to be rich in higher boiling cold-producing medium stream, be rich in higher boiling cold-producing medium stream (liquid state) flow through first device for drying and filtering 25, first throttle device 26, refrigerator evaporator 34 again be rich in low boiling point refrigerant and flow in threeway mixed node 31 places and mix, enter condenser/evaporator 22 then, form the circulation of higher boiling cold-producing medium thereby finally be back to compressor 21; Be rich in low boiling point refrigerant stream through second device for drying and filtering 28, second throttling arrangement 29, freezer evaporator 30 again be rich in the higher boiling cold-producing medium and flow in threeway mixed node 31 places and mix, enter condenser/evaporator 22 then, form the low boiling point refrigerant circulation thereby finally be back to compressor 21.
The first kind situation of compressor 21 continuous services after a period of time is if refrigerating chamber 37 is cooled to refrigerating chamber lower limit temperature T
a, refrigerating chamber 38 temperature also do not drop to refrigerating chamber lower limit temperature T
c, this moment, electric control gear 36 control magnetic valves 33 were opened, and compressor 21 continues operation; As freezer temperature T
2Reduce to refrigerating chamber lower limit temperature T
cThe time electric control gear 36 control compressors 21 shut down.This moment, the circulation of system refrigerant was second kind of cyclic process: mixed refrigerant stream overcompression machine 21, condenser 23, isolate through gas-liquid separator 24 and to be rich in low boiling point refrigerant stream (gaseous state) and to be rich in higher boiling cold-producing medium stream (liquid state): be rich in higher boiling cold-producing medium stream through 25, No. 1 capillary 5 of first device for drying and filtering after the branch two-way, one the tunnel flow through hide chamber evaporimeter 7 again be rich in low boiling point refrigerant stream and be mixed into condenser/evaporator 8, another road directly enters condenser/evaporator, forms the circulation of higher boiling cold-producing medium; Be rich in low boiling point refrigerant and flow through 9, No. 2 capillaries 10 of No. 2 devices for drying and filtering, freezer evaporator 11 is mixed into condenser/evaporator 8 with being rich in higher boiling cold-producing medium stream again, forms the low boiling point refrigerant circulation.Because magnetic valve 6 is opened, be rich in the flow through part that is by-pass out behind the high temperature level capillary-compensated of higher boiling cold-producing medium and directly enter condenser/evaporator, the refrigerant flow of refrigerator evaporator so on the one hand can reduce to flow through, make temperature of refrigerating chamber that certain rise be arranged, and remain on a certain temperature value between the upper and lower limit temperature, the part of refrigerant that is bypassed on the other hand in the condenser/evaporator can increase the heat exchange amount of condenser/evaporator, thereby increases the refrigerating capacity of low temperature level.So, compressor continues operation, and temperature of refrigerating chamber remains between the refrigerating chamber upper and lower limit temperature, compressor shutdown when freezer temperature is reduced to the refrigerating chamber lower limit temperature, and circulation stops.
If the second kind situation of compressor 21 continuous services after a period of time is the temperature T of refrigerating chamber 37
1Descend but do not reduce to refrigerating chamber lower limit temperature T as yet
a, and refrigerating chamber 38 temperature T
2Reduced to refrigerating chamber lower limit temperature T
c, this moment magnetic valve 33 close, compressor 21 opens, as temperature of refrigerating chamber T
1Reduce to refrigerating chamber lower limit temperature T
aThe time compressor 21 shut down.Before magnetic valve 33 cut out 21 shutdown of back compressor, the cyclic process of the cold-producing medium of system was with first kind of cyclic process.
If compressor 21 continuous services the third situation after a period of time is temperature of refrigerating chamber T
1Reduce to refrigerating chamber lower limit temperature T
aThe time freezer temperature T
2Just reduce to refrigerating chamber lower limit temperature T
c, this moment, electric control gear 36 control compressors 21 were shut down.
After compressor 21 was shut down, temperature of refrigerating chamber T1 surpassed its ceiling temperature T
bOr freezer temperature T
2Surpass its ceiling temperature T
dThe time, electric control gear 36 control compressors 21 restart.
Of the present utility model simple in structure from the overlapping two-storage temperature refrigerator, easy to use, its temperature-controlled process step is simple, and compressor 21 is opened all temps situation of back refrigerating chamber 37, refrigerating chamber 38 all to the control corresponding method should be arranged.When refrigerating chamber 37 temperature reach lower limit and refrigerating chamber 38 temperature when still higher, existing temperature-controlled process from the overlapping two-storage temperature refrigerator starts because of high frequent can appear in the temperature that can't mate two chambers, the phenomenon that stops, of the present utility modelly then can pass through opens solenoid valve 33 from overlapping two-storage temperature refrigerator and corresponding temperature-controlled process, thereby reduce the refrigerating capacity that reduces refrigerator evaporator 34 by the refrigerant flow of refrigerator evaporator 34, the temperature of refrigerating chamber 37 can be not low excessively when refrigerating chamber 38 continues cooling like this, so just make the temperature regime of two chambers of refrigerator can both reach the temperature requirement of setting, the variety of issue of having avoided two room temperature degree not match and bring.
Claims (2)
1. one kind from the overlapping two-storage temperature refrigerator, comprises compressor (21), condenser/evaporator (23) and electric control gear (36), and condenser/evaporator (22) is provided with high pressure import and export (22A), (22B) and low pressure import and export (22C), (22D); The exhaust outlet of compressor (21A) is communicated with condenser (23) and gas-liquid separator (24) successively by refrigerant line, and the bottom of gas-liquid separator (24) is communicated with first device for drying and filtering (25), first throttle device (26) and refrigerator evaporator (34) successively by refrigerant line; The top of gas-liquid separator (24) is connected with the high-pressure inlet (22A) of condenser/evaporator by refrigerant line, the high-pressure outlet of condenser/evaporator (22B) is communicated with successively by refrigerant line and is provided with second device for drying and filtering (28), second throttling arrangement (29) and freezer evaporator (30), the outlet of freezer evaporator (30), the outlet of refrigerator evaporator (34) is connected with the low pressure inlet (22C) of condenser/evaporator by threeway mixed node (31), the low tension outlet of condenser/evaporator (22D) is connected with the air entry (21B) of compressor by refrigerant line, in refrigerating chamber (37) and refrigerating chamber (38), be equipped with temperature sensor (39), described temperature sensor (39) and an electric control gear (36) signal communication, electric control gear (36) is electrically connected with compressor (21), it is characterized in that: be provided with bypass line (35) between the refrigerant line before refrigerator evaporator (34) inlet and the low pressure inlet (22C) of condenser/evaporator, bypass line (35) is provided with magnetic valve (33), and magnetic valve (33) is connected with electric control gear (36).
2. according to claim 1 from the overlapping two-storage temperature refrigerator, it is characterized in that: the preceding refrigerant line of compressor air suction mouth (21B) is provided with reservoir (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200911682U CN201463446U (en) | 2009-06-29 | 2009-06-29 | Auto-cascade double-temperature refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200911682U CN201463446U (en) | 2009-06-29 | 2009-06-29 | Auto-cascade double-temperature refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201463446U true CN201463446U (en) | 2010-05-12 |
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ID=42390797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200911682U Expired - Fee Related CN201463446U (en) | 2009-06-29 | 2009-06-29 | Auto-cascade double-temperature refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201463446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852503A (en) * | 2010-05-31 | 2010-10-06 | 西安交通大学 | Multi-temperature refrigerator |
-
2009
- 2009-06-29 CN CN2009200911682U patent/CN201463446U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852503A (en) * | 2010-05-31 | 2010-10-06 | 西安交通大学 | Multi-temperature refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100512 Termination date: 20150629 |
|
| EXPY | Termination of patent right or utility model |