CN211823306U - Indirect cooling system utilizing condensation heat for defrosting - Google Patents
Indirect cooling system utilizing condensation heat for defrosting Download PDFInfo
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- CN211823306U CN211823306U CN201922397623.8U CN201922397623U CN211823306U CN 211823306 U CN211823306 U CN 211823306U CN 201922397623 U CN201922397623 U CN 201922397623U CN 211823306 U CN211823306 U CN 211823306U
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- electromagnetic valve
- refrigerant
- air cooler
- secondary refrigerant
- cooler
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Abstract
The utility model discloses an utilize indirect cooling system of condensation heat defrosting. The utility model discloses utilize the secondary refrigerant to retrieve refrigerating system heat of condensation and be used for the defrosting process, the evaporimeter adopts parallelly connected, during the defrosting, the secondary refrigerant who accomplishes the heat transfer with the evaporimeter flows through the cooler and gets into the secondary refrigerant pump with after the heat transfer is accomplished to gas in the cold space, the secondary refrigerant passes through opening and close of solenoid valve in the control pipeline and gets into the condenser after the pressurization, later the secondary refrigerant flows through the air-cooler and accomplishes the defrosting process, air-cooler of defrosting process carries out the defrosting, another air-cooler continues to refrigerate, thereby guarantee the stability of the refrigerating capacity that entire system's provided, the temperature fluctuation between the cold has been reduced.
Description
Technical Field
The utility model relates to an indirect refrigerating system's heat recovery and air-cooler defrosting are the improvement to indirect refrigerating system.
Background
When the traditional air cooler is used for refrigerating, the surface temperature of the fan coil is reduced. When water vapor in the air is more, the water vapor can frost on the surface of the coil pipe of the air cooler, so that the heat transfer resistance of the fan is increased, and the performance of the fan is deteriorated. Meanwhile, the air flow of the air cooler is blocked, the heat productivity of the motor is increased, and the heat load of the refrigeration house is further increased. Therefore, how to effectively defrost is an important problem to be solved urgently.
The indirect refrigeration system has wide application prospect due to the advantages of reducing the filling of the refrigerant, being capable of conveying the secondary refrigerant in a long distance and the like. However, the system efficiency is low due to the two heat transfer temperature differences, so that the heat in the system needs to be recycled to improve the system efficiency.
In view of the foregoing, there is a need for an indirect refrigeration system with good defrosting effect and simple defrosting control, which can recover the heat in the system to improve the system efficiency.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the utility model provides a new indirect cooling system who utilizes the heat of condensation to defrost, reasonable in design is simple, has reduced defrosting process system refrigerating output and has undulant, has reduced the storehouse temperature and has undulant, has improved indirect refrigerating system's efficiency.
In order to achieve the above purpose, the utility model adopts the following technical means:
the utility model relates to an utilize indirect cooling system of condensation heat defrosting, constitute by refrigerant system and secondary refrigerant system, the refrigerant system includes air-cooler one 1, air-cooler two 2, compressor 3, condenser 4, reservoir 5, choke valve 6, air-cooler one 1 and air-cooler two 2 are parallelly connected, the refrigerant export of parallelly connected air-cooler one 1 and air-cooler two 2 links to each other with compressor 3 induction port, compressor 3 gas vent links to each other with condenser 4 refrigerant import, condenser 4 refrigerant export and reservoir 5 access connection, reservoir 5 export and choke valve 6 access connection, choke valve 6 export divides into two routes, link to each other with air-cooler one 1 refrigerant inlet pipeline through solenoid valve one 7, another link to each other with air-cooler 2 refrigerant inlet pipeline through solenoid valve two 8;
the secondary refrigerant system comprises a cooler 9 and a secondary refrigerant pump 10, secondary refrigerant is cooled by a first air cooler 1 and a second air cooler 2 and then flows into the cooler 9 in a converging manner, an outlet of the cooler 9 is connected with an inlet of the secondary refrigerant pump 10, an outlet of the secondary refrigerant pump 10 is divided into three paths, and one path is connected with a secondary refrigerant inlet of the first air cooler 1 through a fourth electromagnetic valve 12; one path of flow passes through the electromagnetic valve III 11 and is connected with a secondary refrigerant inlet of the air cooler II 2; one path of the refrigerant enters the inlet of the condenser secondary refrigerant through a fifth electromagnetic valve 13 and is divided into two paths through the outlet of the condenser secondary refrigerant, one path of the refrigerant is connected with an outlet pipeline of a fourth electromagnetic valve 12 through a sixth electromagnetic valve 14, and the other path of the refrigerant is connected with an outlet pipeline of a third electromagnetic valve 11 through a seventh electromagnetic valve 15;
inlets of the first electromagnetic valve 7 and the second electromagnetic valve 8 are connected with an outlet pipeline of the throttle valve 6, and outlets of the first electromagnetic valve 7 and the second electromagnetic valve 8 are respectively connected with a refrigerant inlet pipeline of the first air cooler 1 and a refrigerant inlet pipeline of the second air cooler 2; inlets of the electromagnetic valve III 11, the electromagnetic valve IV 12 and the electromagnetic valve V13 are connected with an outlet pipeline of the coolant pump, and outlets of the electromagnetic valve III 11, the electromagnetic valve IV 12 and the electromagnetic valve V13 are sequentially connected with a coolant inlet pipeline of the air cooler II 2, the air cooler I1 and the condenser 4; inlets of the six solenoid valves 14 and the seven solenoid valves 15 are connected with a secondary refrigerant outlet pipeline of the condenser 4, and outlets of the six solenoid valves 14 and the seven solenoid valves 15 are sequentially connected with outlet pipelines of the four solenoid valves 12 and the three solenoid valves 11.
The utility model has the advantages that:
1. the defrosting pipeline is simple and easy to control by slightly changing the traditional indirect refrigeration system.
2. In the refrigerant system, the air cooler adopts a parallel alternative defrosting mode, so that the change of the refrigerating capacity of the system in the defrosting process is reduced, and the temperature fluctuation of a cold space is reduced.
3. The condensation heat is recovered for defrosting, and the efficiency of the indirect refrigeration system is improved.
Drawings
FIG. 1 is a schematic flow diagram of an indirect cooling system using heat of condensation to defrost;
Detailed Description
The present invention will be described in further detail with reference to the following detailed description.
Referring to fig. 1, the refrigerating system comprises a refrigerant system and a secondary refrigerant system, wherein the refrigerant system comprises a first air cooler 1, a second air cooler 2, a compressor 3, a condenser 4, a liquid accumulator 5 and a throttle valve 6, the first air cooler 1 is connected with the second air cooler 2 in parallel, refrigerant outlets of the first air cooler 1 and the second air cooler 2 in parallel are connected with an air suction port of the compressor 3, an air outlet of the compressor 3 is connected with a refrigerant inlet of the condenser 4, a refrigerant outlet of the condenser 4 is connected with an inlet of the liquid accumulator 5, an outlet of the liquid accumulator 5 is connected with an inlet of the throttle valve 6, outlets of the throttle valve 6 are divided into two paths, one path is connected with a refrigerant inlet pipeline of the first air cooler 1 through a first electromagnetic valve 7;
the secondary refrigerant system comprises a cooler 9 and a secondary refrigerant pump 10, secondary refrigerant is cooled by a first air cooler 1 and a second air cooler 2 and then flows into the cooler 9 in a converging manner, an outlet of the cooler 9 is connected with an inlet of the secondary refrigerant pump 10, an outlet of the secondary refrigerant pump 10 is divided into three paths, and one path is connected with a secondary refrigerant inlet of the first air cooler 1 through a fourth electromagnetic valve 12; one path of flow passes through the electromagnetic valve III 11 and is connected with a secondary refrigerant inlet of the air cooler II 2; one path of the refrigerant enters the inlet of the condenser secondary refrigerant through a fifth electromagnetic valve 13 and is divided into two paths through the outlet of the condenser secondary refrigerant, one path of the refrigerant is connected with an outlet pipeline of a fourth electromagnetic valve 12 through a sixth electromagnetic valve 14, and the other path of the refrigerant is connected with an outlet pipeline of a third electromagnetic valve 11 through a seventh electromagnetic valve 15; inlets of the first electromagnetic valve 7 and the second electromagnetic valve 8 are connected with an outlet pipeline of the throttle valve 6, and outlets of the first electromagnetic valve 7 and the second electromagnetic valve 8 are respectively connected with a refrigerant inlet pipeline of the first air cooler 1 and a refrigerant inlet pipeline of the second air cooler 2; inlets of the electromagnetic valve III 11, the electromagnetic valve IV 12 and the electromagnetic valve V13 are connected with an outlet pipeline of the coolant pump, and outlets of the electromagnetic valve III 11, the electromagnetic valve IV 12 and the electromagnetic valve V13 are sequentially connected with a coolant inlet pipeline of the air cooler II 2, the air cooler I1 and the condenser 4; inlets of the six solenoid valves 14 and the seven solenoid valves 15 are connected with a secondary refrigerant outlet pipeline of the condenser 4, and outlets of the six solenoid valves 14 and the seven solenoid valves 15 are sequentially connected with outlet pipelines of the four solenoid valves 12 and the three solenoid valves 11.
In the defrosting-free system cycle, a first electromagnetic valve 7 and a second electromagnetic valve 8 of a refrigerant system are opened, the refrigerant is compressed by a compressor 3, heated and pressurized, then enters a condenser 4 to emit heat to finish the condensation process, high-temperature and high-pressure refrigerant gas out of the condenser sequentially flows through a liquid storage device 5 and a throttle valve 6, the throttled refrigerant enters an air cooler 1 and an air cooler 2 in two paths in a gas-liquid two-phase state to exchange heat with secondary refrigerant to finish the refrigeration process, and then the refrigerant is sucked by the compressor again to finish the refrigeration cycle. And in the secondary refrigerant system, the electromagnetic valve five 13 is closed, the electromagnetic valve three 11 and the electromagnetic valve four 12 are opened, secondary refrigerant flows into the cooler 9 after being cooled by the air cooler I1 and the air cooler II 2 to complete cooling of a used cold space, and then is pressurized by the secondary refrigerant pump 9 and then flows into the air cooler I1 and the air cooler II 2 again in two paths to be cooled.
When the system defrosts, an alternate defrosting mode is adopted, when the air cooler I1 defrosts, the electromagnetic valve I7 is closed, the electromagnetic valve II 8 is opened, and all the gas-liquid two-phase refrigerant which is discharged from the throttle valve 6 enters the air cooler II 2 to be evaporated so as to finish cooling the secondary refrigerant; the secondary refrigerant is cooled by the second air cooler 2, flows into the cooler 9 to complete cooling of the cold space, flows into the secondary refrigerant pump 9, at the moment, the third electromagnetic valve 11, the fifth electromagnetic valve 13 and the sixth electromagnetic valve 14 are opened, the fourth electromagnetic valve 12 and the seventh electromagnetic valve 15 are closed, the secondary refrigerant flows out of the secondary refrigerant pump 9 and is divided into two paths, one path flows into the condenser 4 through the fifth electromagnetic valve 13 to absorb condensation heat and then enters the first air cooler 1 through the sixth electromagnetic valve 14 to be defrosted, the other path flows into the second air cooler 2 through the third electromagnetic valve 11 to be cooled, and then the two paths of secondary refrigerant are converged and flow into the cooler 9 to complete cooling of the cold space. When the air cooler 2 is defrosted, the first electromagnetic valve 7, the fourth electromagnetic valve 12, the fifth electromagnetic valve 13 and the seventh electromagnetic valve 15 are opened, the second electromagnetic valve 8, the third electromagnetic valve 11 and the sixth electromagnetic valve 14 are closed, the secondary refrigerant flows out of the secondary refrigerant pump 10 and is divided into two paths, one path of secondary refrigerant flows into the condenser 4 through the fifth electromagnetic valve 13 to absorb condensation heat and then flows into the second air cooler 2 through the seventh electromagnetic valve 15 to be defrosted, the other path of secondary refrigerant flows into the first air cooler 1 through the fourth electromagnetic valve 12 to be refrigerated, and then the two paths of secondary refrigerant are converged and flow into the cooler 9. Although the defrosted secondary refrigerant and the secondary refrigerant cooled by the air cooler are converged to consume part of cold energy for cooling a cold space, the cooling effect can be controlled by adjusting the flow of the secondary refrigerant by a pump in the secondary refrigerant system, and the condensation heat of the refrigeration system is recovered by alternately defrosting in the defrosting process, so that the refrigerating capacity of the system is not greatly reduced in defrosting, the system is stable, simple and strong in operability, and the like, and the loss of the part of cold energy can be accepted.
While the present invention has been described above with reference to the accompanying drawings, it is not limited to the above specific embodiments, which are illustrative only and not restrictive. The change under the flow of the utility model is within the protection of the utility model.
Claims (1)
1. An indirect cooling system for defrosting by utilizing condensation heat is characterized by consisting of a refrigerant system and a secondary refrigerant system, the refrigerant system comprises a first air cooler (1), a second air cooler (2), a compressor (3), a condenser (4), a liquid storage device (5) and a throttle valve (6), wherein the first air cooler (1) and the second air cooler (2) are connected in parallel, the refrigerant outlets of a first air cooler (1) and a second air cooler (2) which are connected in parallel are connected with an air suction port of a compressor (3), an air exhaust port of the compressor (3) is connected with a refrigerant inlet of a condenser (4), a refrigerant outlet of the condenser (4) is connected with an inlet of a liquid storage device (5), an outlet of the liquid storage device (5) is connected with an inlet of a throttle valve (6), an outlet of the throttle valve (6) is divided into two paths, one path is connected with a refrigerant inlet pipeline of the first air cooler (1) through a first electromagnetic valve (7), and the other path is connected with a refrigerant inlet pipeline of the second air cooler (2) through a;
the secondary refrigerant system comprises a cooler (9) and a secondary refrigerant pump (10), secondary refrigerant is cooled by a first air cooler (1) and a second air cooler (2) and then flows into the cooler (9), the outlet of the cooler (9) is connected with the inlet of the secondary refrigerant pump (10), the outlet of the secondary refrigerant pump (10) is divided into three paths, and one path is connected with the secondary refrigerant inlet of the first air cooler (1) through a fourth electromagnetic valve (12); one path of flow passes through the electromagnetic valve III (11) and is connected with a secondary refrigerant inlet of the air cooler II (2); one path of the refrigerant enters the inlet of the condenser secondary refrigerant through a fifth electromagnetic valve (13), and is divided into two paths through the outlet of the condenser secondary refrigerant, wherein one path of the refrigerant is connected with the outlet pipeline of a fourth electromagnetic valve (12) through a sixth electromagnetic valve (14), and the other path of the refrigerant is connected with the outlet pipeline of a third electromagnetic valve (11) through a seventh electromagnetic valve (15);
inlets of the first electromagnetic valve (7) and the second electromagnetic valve (8) are connected with an outlet pipeline of the throttle valve (6), and outlets of the first electromagnetic valve (7) and the second electromagnetic valve (8) are respectively connected with refrigerant inlet pipelines of the first air cooler (1) and the second air cooler (2); inlets of a third electromagnetic valve (11), a fourth electromagnetic valve (12) and a fifth electromagnetic valve (13) are connected with an outlet pipeline of the coolant pump, and outlets of the third electromagnetic valve (11), the fourth electromagnetic valve (12) and the fifth electromagnetic valve (13) are sequentially connected with a second air cooler (2), a first air cooler (1) and a coolant inlet pipeline of the condenser (4); inlets of the six solenoid valves (14) and the seven solenoid valves (15) are connected with a secondary refrigerant outlet pipeline of the condenser (4), and outlets of the six solenoid valves (14) and the seven solenoid valves (15) are sequentially connected with outlet pipelines of the four solenoid valves (12) and the three solenoid valves (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922397623.8U CN211823306U (en) | 2019-12-27 | 2019-12-27 | Indirect cooling system utilizing condensation heat for defrosting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922397623.8U CN211823306U (en) | 2019-12-27 | 2019-12-27 | Indirect cooling system utilizing condensation heat for defrosting |
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| CN211823306U true CN211823306U (en) | 2020-10-30 |
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| CN201922397623.8U Expired - Fee Related CN211823306U (en) | 2019-12-27 | 2019-12-27 | Indirect cooling system utilizing condensation heat for defrosting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111059809A (en) * | 2019-12-27 | 2020-04-24 | 天津商业大学 | Indirect cooling system utilizing condensation heat for defrosting |
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2019
- 2019-12-27 CN CN201922397623.8U patent/CN211823306U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111059809A (en) * | 2019-12-27 | 2020-04-24 | 天津商业大学 | Indirect cooling system utilizing condensation heat for defrosting |
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Granted publication date: 20201030 Termination date: 20211227 |