CN215809493U - Multi-evaporator refrigeration system for defrosting by using condensed liquid - Google Patents
Multi-evaporator refrigeration system for defrosting by using condensed liquid Download PDFInfo
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- CN215809493U CN215809493U CN202023055158.9U CN202023055158U CN215809493U CN 215809493 U CN215809493 U CN 215809493U CN 202023055158 U CN202023055158 U CN 202023055158U CN 215809493 U CN215809493 U CN 215809493U
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Abstract
The utility model discloses a multi-evaporator refrigeration system for defrosting by using condensate, which comprises a compressor (1), a condenser (2), a plurality of evaporators (3, 4 and 5), a refrigerant pump (6), a liquid supply one-way valve (7), throttling devices (31, 41 and 51) corresponding to the evaporators (3, 4 and 5), liquid supply electromagnetic valves (32, 42 and 52), defrosting liquid supply valves (33, 43 and 53), air return electromagnetic valves (34, 44 and 54), defrosting liquid return valves (35, 45 and 55) and liquid return one-way valves (36, 46 and 56), wherein the number of the throttling devices is equal to that of the evaporators; the utility model can utilize the condensed refrigerant liquid to defrost the evaporator (3) which needs defrosting, and simultaneously, because the defrosting heat release increases the supercooling degree of the refrigerant liquid, the operation efficiency of the system can be improved by supplying the part of liquid to other evaporators (4, 5) for refrigeration work again.
Description
Technical Field
The utility model relates to the technical field of refrigeration, in particular to a multi-evaporator refrigeration system for defrosting by using condensate.
Background
The application field of the refrigerating system is extremely wide, when the temperature of an evaporator of the refrigerating system is lower than zero, the surface of the evaporator is easy to frost, so that the heat exchange efficiency of the evaporator and the operation energy efficiency of the refrigerating system are greatly reduced, and the evaporator frosting phenomenon is very common in the application of a refrigeration house, a refrigerator, a low-temperature air source heat pump and the like. In order to remove the frost layer on the surface of the evaporator, various methods such as hot defrosting, electric defrosting, water defrosting and the like can be adopted, but all have certain limitations.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a multiple evaporator refrigeration system using condensed liquid for defrosting, which uses condensed refrigerant liquid for defrosting, does not require external energy, can overcome the disadvantage of severe fluctuation of space temperature caused by thermal defrosting, and simultaneously, fully uses the refrigerant liquid for supercooling to improve the operation efficiency of the system.
Therefore, the utility model provides a multi-evaporator refrigeration system for defrosting by using condensed liquid, which comprises a compressor, a condenser, a plurality of evaporators, a refrigerant pump, a liquid supply one-way valve, throttling devices, a liquid supply electromagnetic valve, an air return electromagnetic valve, a defrosting liquid supply valve, a defrosting liquid return valve and a liquid return one-way valve, wherein the number of the throttling devices corresponds to that of the evaporators;
the outlet of the compressor is connected with the inlet of the condenser, and the inlet of the compressor is connected with the outlets of the air return electromagnetic valves;
the inlet of the evaporator is respectively connected with the outlet of the throttling device and the outlet of the defrosting liquid supply valve, and the outlet of the evaporator is respectively connected with the inlet of the air return electromagnetic valve and the inlet of the defrosting liquid return valve;
the outlet of the condenser is divided into two paths, one path is connected with the inlet of the refrigerant pump, and the other path is connected with the inlet of the liquid supply one-way valve;
the inlet of the liquid supply one-way valve is connected with the outlet of the condenser, the outlet of the liquid supply one-way valve is simultaneously connected with the inlet of the liquid supply electromagnetic valve and the outlet of the liquid return one-way valve, and the liquid supply one-way valve is used for preventing the refrigerant liquid after defrosting from reentering the inlet of the refrigerant pump;
the inlet of the liquid supply electromagnetic valve is connected with the outlet of the liquid supply one-way valve, and the outlet of the liquid supply electromagnetic valve is connected with the inlet of the throttling device;
the inlet of the throttling device is connected with the outlet of the liquid supply electromagnetic valve, and the outlet of the throttling device is connected with the inlet of the evaporator;
the inlet of the air return electromagnetic valve is connected with the outlet of the evaporator, and the outlet of the air return electromagnetic valve is connected with the inlet of the compressor;
the inlet of the defrosting liquid supply valve is connected with the outlet of the refrigerant pump, and the outlet of the defrosting liquid supply valve is connected with the inlet of the evaporator;
the inlet of the defrosting liquid return valve is connected with the outlet of the evaporator, and the outlet of the defrosting liquid return valve is connected with the inlet of the liquid return one-way valve;
the inlet of the liquid return one-way valve is connected with the defrosting liquid return valve, the outlet of the liquid return one-way valve is connected with the outlet of the liquid supply one-way valve, and the liquid return one-way valve is used for preventing the refrigerant at the outlet of the condenser from flowing backwards into the air suction port of the compressor through the defrosting liquid return valve.
The working process of the whole system comprises the following steps:
(1) defrosting-free mode
At the moment, all evaporators do not need defrosting, the defrosting liquid supply valve, the defrosting liquid return valve and the refrigerant pump are all closed, the liquid supply electromagnetic valve and the air return electromagnetic valve of the corresponding working evaporator are opened, the compressor normally operates, and the refrigerant is sent into the working evaporator for refrigeration;
(2) defrosting mode
When one evaporator needs defrosting, the corresponding defrosting liquid supply valve and defrosting liquid return valve are opened, the liquid supply electromagnetic valve and air return electromagnetic valve are closed, the liquid supply electromagnetic valves and air return electromagnetic valves of other evaporators which work normally are opened, the defrosting liquid supply valve and defrosting liquid return valve are closed, the refrigerant pump is opened, the compressor operates normally, liquid in the rear part of the condenser is sent into the evaporator needing defrosting to release heat and defrost, and cooled refrigerant liquid is sent into the evaporator which works normally to be refrigerated after passing through the defrosting one-way valve.
According to the utility model, the refrigerant condensate is adopted to defrost the evaporator to be defrosted, and the cooling effect of defrosting on the refrigerant liquid is fully utilized, so that the overall refrigeration efficiency is improved, and the influence on the temperature of a refrigeration space during defrosting is reduced.
Drawings
FIG. 1 is a schematic diagram of a multiple evaporator refrigeration system utilizing condensate defrosting in accordance with the present invention;
in the figure, 1 is a compressor, 2 is a condenser, 3, 4 and 5 are evaporators, 6 is a refrigerant pump, 7 is a liquid supply one-way valve, 31, 41 and 51 are throttling devices, 32, 42 and 52 are liquid supply electromagnetic valves, 33, 43 and 53 are defrosting liquid supply valves, 34, 44 and 54 are air return electromagnetic valves, 35, 45 and 55 are defrosting liquid return valves, and 36, 46 and 56 are liquid return one-way valves.
Detailed Description
In order that those skilled in the art will better understand the technical solution of the present invention, the following detailed description of the present invention is provided in conjunction with the accompanying drawings and embodiments.
Referring to fig. 1, the present invention provides a multiple evaporator refrigeration system using condensate defrosting, comprising a compressor (1), a condenser (2), evaporators (3, 4, 5), a refrigerant pump (6), a liquid supply check valve (7), and throttling devices (31, 41, 51) corresponding to the number of the evaporators (3, 4, 5), liquid supply solenoid valves (32, 42, 52), defrosting liquid supply valves (33, 43, 53), air return solenoid valves (34, 44, 54), defrosting liquid return valves (35, 45, 55) and liquid return check valves (36, 46, 56); the embodiment takes three independent evaporators (3, 4, 5) as an example, but the actual application is not limited to the number;
the outlet of the compressor (1) is connected with the inlet of the condenser (2), and the inlet of the compressor (1) is connected with the outlets of the air return electromagnetic valves (34, 44 and 54);
inlets of the evaporators (3, 4 and 5) are respectively connected with outlets of the throttling devices (31, 41 and 51) and outlets of the defrosting liquid supply valves (33, 43 and 53), and outlets of the evaporators (3, 4 and 5) are respectively connected with inlets of the air return electromagnetic valves (34, 44 and 54) and inlets of the defrosting liquid return valves (35, 45 and 55);
the outlet of the condenser (2) is divided into two paths, one path is connected with the inlet of a refrigerant pump (6), and the other path is connected with the inlet of a liquid supply one-way valve (7);
the inlet of the liquid supply one-way valve (7) is connected with the outlet of the condenser (2), and the outlet of the liquid supply one-way valve is simultaneously connected with the inlets of the liquid supply electromagnetic valves (32, 42, 52) and the outlets of the liquid return one-way valves (36, 46, 56);
the inlet of the liquid supply electromagnetic valve (32, 42, 52) is connected with the outlet of the liquid supply one-way valve (7), and the outlet of the liquid supply electromagnetic valve is connected with the inlet of the throttling device (31, 41, 51);
the inlets of the throttling devices (31, 41, 51) are connected with the outlets of the liquid supply electromagnetic valves (32, 42, 52), and the outlets of the throttling devices are connected with the inlets of the evaporators (3, 4, 5);
the inlet of the air return electromagnetic valve (34, 44, 54) is connected with the outlet of the evaporator (3, 4, 5), and the outlet of the air return electromagnetic valve is connected with the inlet of the compressor (1);
the defrosting liquid supply valve (33, 43, 53) is connected with the outlet of the refrigerant pump (6) at the inlet and is connected with the inlet of the evaporator (3, 4, 5) at the outlet;
the defrosting liquid return valve (35, 45, 55) is connected with the outlet of the evaporator (3, 4, 5) at the inlet and is connected with the inlet of the liquid return one-way valve (36, 46, 56) at the outlet;
the inlets of the liquid return check valves (36, 46 and 56) are connected with defrosting liquid return valves (35, 45 and 55), and the outlets of the liquid return check valves are connected with the outlet of the liquid supply check valve (7).
The working process of the whole system comprises the following steps:
(1) defrosting-free mode
At the moment, all evaporators (3, 4 and 5) do not need defrosting, the defrosting liquid supply valves (33, 43 and 53), the defrosting liquid return valves (35, 45 and 55) and the refrigerant pump (6) are all closed, the liquid supply electromagnetic valves (32, 42 and 52) and the air return electromagnetic valves (34, 44 and 54) of the corresponding working evaporators (3, 4 and 5) are opened, the compressor (1) normally operates, and the refrigerant is sent to the working evaporators (3, 4 and 5) for refrigeration;
(2) defrosting mode
When a certain evaporator needs defrosting, taking the evaporator (3) as an example, the corresponding defrosting liquid supply valve (33) and defrosting liquid return valve (35) are opened, the liquid supply electromagnetic valve (32) and air return electromagnetic valve (34) are closed, the liquid supply electromagnetic valves (42, 52) and air return electromagnetic valves (44, 54) of other evaporators (4, 5) which normally work are opened, the defrosting liquid supply valves (43, 53) and defrosting liquid return valves (45, 55) are closed, the refrigerant pump (6) is opened, the compressor (1) normally works, at the moment, liquid in the rear part of the condenser (2) is sent into the evaporator (3) which needs defrosting to release heat and defrost, and cooled refrigerant liquid is sent into the evaporators (4, 5) which normally work after passing through the defrosting one-way valve (36) to be refrigerated.
According to the utility model, the refrigerant condensate is adopted to defrost the evaporator to be defrosted, and the cooling effect of defrosting on the refrigerant liquid is fully utilized, so that the overall refrigeration efficiency is improved, and the influence on the temperature of a refrigeration space during defrosting is reduced.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A multi-evaporator refrigeration system for defrosting by using condensate is characterized by comprising a compressor (1), a condenser (2), a plurality of evaporators (3, 4 and 5), a refrigerant pump (6), liquid supply one-way valves (7), throttling devices (31, 41 and 51) corresponding to the number of the evaporators (3, 4 and 5), liquid supply electromagnetic valves (32, 42 and 52), defrosting liquid supply valves (33, 43 and 53), air return electromagnetic valves (34, 44 and 54), defrosting liquid return valves (35, 45 and 55) and liquid return one-way valves (36, 46 and 56);
inlets of the evaporators (3, 4 and 5) are respectively connected with outlets of the throttling devices (31, 41 and 51) and outlets of the defrosting liquid supply valves (33, 43 and 53), and outlets of the evaporators (3, 4 and 5) are respectively connected with inlets of the air return electromagnetic valves (34, 44 and 54) and inlets of the defrosting liquid return valves (35, 45 and 55);
the outlet of the condenser (2) is divided into two paths, one path is connected with the inlet of a refrigerant pump (6), and the other path is connected with the inlet of a liquid supply one-way valve (7);
the inlet of the liquid supply one-way valve (7) is connected with the outlet of the condenser (2), and the outlet of the liquid supply one-way valve is simultaneously connected with the inlets of the liquid supply electromagnetic valves (32, 42, 52) and the outlets of the liquid return one-way valves (36, 46, 56);
the defrosting liquid supply valve (33, 43, 53) is connected with the outlet of the refrigerant pump (6) at the inlet and is connected with the inlet of the evaporator (3, 4, 5) at the outlet;
the defrosting liquid return valve (35, 45, 55) is connected with the outlet of the evaporator (3, 4, 5) at the inlet and is connected with the inlet of the liquid return one-way valve (36, 46, 56) at the outlet;
the inlets of the liquid return check valves (36, 46 and 56) are connected with defrosting liquid return valves (35, 45 and 55), and the outlets of the liquid return check valves are connected with the outlet of the liquid supply check valve (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023055158.9U CN215809493U (en) | 2020-12-16 | 2020-12-16 | Multi-evaporator refrigeration system for defrosting by using condensed liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023055158.9U CN215809493U (en) | 2020-12-16 | 2020-12-16 | Multi-evaporator refrigeration system for defrosting by using condensed liquid |
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| Publication Number | Publication Date |
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| CN215809493U true CN215809493U (en) | 2022-02-11 |
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| CN202023055158.9U Active CN215809493U (en) | 2020-12-16 | 2020-12-16 | Multi-evaporator refrigeration system for defrosting by using condensed liquid |
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| CN (1) | CN215809493U (en) |
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