CN215216749U - Defrosting system with multiple evaporators connected in parallel - Google Patents
Defrosting system with multiple evaporators connected in parallel Download PDFInfo
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- CN215216749U CN215216749U CN202120833801.1U CN202120833801U CN215216749U CN 215216749 U CN215216749 U CN 215216749U CN 202120833801 U CN202120833801 U CN 202120833801U CN 215216749 U CN215216749 U CN 215216749U
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Abstract
The application discloses a defrosting system with a plurality of evaporators connected in parallel, which comprises n evaporators, wherein n is more than or equal to 3; n evaporators are arranged in parallel; the input end of each evaporator is respectively connected with a first input pipe and a second input pipe, and the output end of each evaporator is respectively connected with a first output pipe and a second output pipe; each first input pipe is connected to the liquid outlet end of the gas-liquid separator through a liquid pump, and a first electromagnetic valve is arranged on each first input pipe; each first output pipe is uniformly connected to the input end of the gas-liquid separator, and a second electromagnetic valve is arranged on each first output pipe; each second input pipe is uniformly connected to a main pipeline conveying pipe between the high-pressure liquid reservoir and the gas-liquid separator, and each second input pipe is provided with a third electromagnetic valve; and each second output pipe is uniformly connected with the main pipeline conveying pipe through a check valve, and a fourth electromagnetic valve is arranged on each second output pipe. The energy-saving defrosting device has the advantages of low energy consumption, high defrosting efficiency and capability of realizing maximum utilization of energy.
Description
Technical Field
The application relates to the technical field of defrosting, in particular to a defrosting system with multiple evaporators connected in parallel.
Background
With the increase of the state of technology, frozen foods are widely appearing in people's lives, wherein a refrigeration system plays an important role. In the operation process of the refrigeration system, the frosting phenomenon appears on the surface of the evaporator, the occurrence of the frost layer seriously affects the heat transfer capacity of the evaporator, the refrigeration efficiency of the system is greatly reduced, and in this case, the defrosting treatment is needed. At present, the following 5 common defrosting modes are compressed air defrosting, manual defrosting, water defrosting, hot air defrosting and electric heating defrosting respectively.
The defrosting process is relatively power-consuming and the device is relatively expensive. Manual frost sweeping is a direct defrosting mode, labor cost is paid, heating and cooling capacity of defrosting personnel is increased, and efficiency is low. The defrosting method has the advantages that the defrosting method can only be used for defrosting of the air cooler, is generally combined with hot air defrosting, is only suitable for the conditions that the frosting speed of the air cooler is low and a frost layer is thin when the defrosting method is used alone, and is limited in application range, large in power consumption and water consumption and high in defrosting cost. Hot gas defrosting, the system is complicated, and when the operation is not proper, the system can be failed. In practical use, the refrigeration system for hot gas defrosting has some problems to be solved urgently, and particularly, no clear determination about the flow rate and flow rate of hot ammonia and reasonable defrosting time exists. The electric heating defrosting has the maximum energy consumption and low efficiency. Through analysis, the existing refrigeration system still has defects in overcoming energy consumption, efficiency and reasonable utilization of resources.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application aims to provide a defrosting system with multiple parallel evaporators, which has low energy consumption and high defrosting efficiency, improves the efficiency and the device performance of a refrigeration system, and realizes the maximum utilization of energy.
To achieve the above technical objects, the present application provides
The defrosting system with a plurality of evaporators connected in parallel comprises n evaporators, wherein n is more than or equal to 3;
the n evaporators are arranged in parallel;
the input end of each evaporator is respectively connected with a first input pipe and a second input pipe, and the output end of each evaporator is respectively connected with a first output pipe and a second output pipe;
each first input pipe is connected to the liquid outlet end of the gas-liquid separator through a liquid pump, and a first electromagnetic valve is arranged on each first input pipe;
each first output pipe is uniformly connected to the input end of the gas-liquid separator, and a second electromagnetic valve is arranged on each first output pipe;
each second input pipe is connected to a main pipeline conveying pipe between a high-pressure liquid storage device and the gas-liquid separator in a unified mode and used for conveying unthrottled refrigerant liquid from the high-pressure liquid storage device, and each second input pipe is provided with a third electromagnetic valve;
each second output pipe is uniformly connected to the main pipeline conveying pipe between the high-pressure liquid storage device and the gas-liquid separator through a check valve and used for mixing the supercooled refrigerant liquid with the main pipeline saturated refrigerant liquid, and a fourth electromagnetic valve is arranged on each second output pipe.
Further, each second input pipe is uniformly connected to the main pipeline conveying pipe at a position close to the drying filter.
Further, each second input pipe is connected to a position, close to the gas-liquid separator, on the main pipeline conveying pipe through a check valve in a unified mode.
Further, the number of the evaporators is specifically 4.
Further, the refrigerant liquid stored in the high-pressure liquid storage device is liquid medium.
According to the technical scheme, at least 3 evaporators which are connected in parallel are arranged, wherein the input end of each evaporator is connected with a first input pipe and a second input pipe respectively, and the output end of each evaporator is connected with a first output pipe and a second output pipe respectively; each first input pipe is communicated with the liquid outlet end of the gas-liquid separator through a liquid pump, and a first electromagnetic valve is arranged on each first input pipe; each first output pipe is communicated with the input end of the gas-liquid separator in a unified mode, and each first output pipe is provided with a second electromagnetic valve; each second input pipe is communicated with the output end of the drying filter in a unified mode, and each second input pipe is provided with a third electromagnetic valve; each second input pipe is communicated with the output end of the drying filter through a check valve in a unified mode, and a fourth electromagnetic valve is arranged on each second output pipe. With this design, even if a certain evaporator is defrosted, no shutdown is required.
For example, when the frost thickness of the 1 st evaporator reaches a set value, the 1 st evaporator stops the cooling mode and switches to the defrosting mode. The 2 nd evaporator … … continues the cooling mode, and during specific work, the first electromagnetic valve and the second electromagnetic valve of the 1 st evaporator are closed, the third electromagnetic valve and the fourth electromagnetic valve are opened, the respective first electromagnetic valve and the respective second electromagnetic valve of the nth evaporator of the 2 nd evaporator … … are opened, and the respective third electromagnetic valve and the respective fourth electromagnetic valve are closed; the un-throttled refrigerant liquid from the high-pressure liquid storage device enters the 1 st evaporator through the third electromagnetic valve of the 1 st evaporator, the cold energy of the frost layer of the 1 st evaporator is absorbed, the 1 st evaporator is defrosted and simultaneously is supercooled, and the supercooled refrigerant is mixed with the main path saturated liquid refrigerant after the fourth electromagnetic valve and the check valve of the 1 st evaporator, so that the main path liquid refrigerant is supercooled, and the refrigerating capacity is improved. When the defrosting of the 1 st evaporator is finished, the 1 st evaporator reenters the refrigeration mode, at the moment, the first electromagnetic valve and the second electromagnetic valve of the 1 st evaporator are opened, the third electromagnetic valve and the fourth electromagnetic valve are closed, and the electromagnetic valve switches of other evaporators are unchanged.
The whole has the following beneficial effects:
the defrosting control system can achieve alternate defrosting of a plurality of evaporators, reasonably control a frost layer, and keep the frostless or frostless state of all the evaporators, so that the refrigeration system does not stop working. Under the condition that the evaporator meets the heat exchange quantity of the system, at least one more evaporator is used as a standby machine for defrosting, and refrigeration and defrosting are alternately operated, so that defrosting can be realized, the heat exchange quantity of the system can not be influenced, the defrosting efficiency is high, safety and reliability are realized, additional energy is not consumed, and the operation feasibility is high.
And 2, the refrigerant liquid absorbs the cold energy of the frost layer while defrosting, and then returns to the other evaporator, so that the cold energy of the frost layer is reasonably utilized, the refrigeration efficiency of the evaporator receiving the defrosted refrigerant liquid is improved, the maximum utilization of energy is realized, the energy-saving effect is obvious, and the economic benefit is high.
3, the opening and closing of the electromagnetic valves are controlled to realize that a plurality of evaporators can continuously defrost while refrigerating, so that the operation of the evaporators is kept at a certain controllable value, and the temperature and the humidity of the room environment are ensured to be constant.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic diagram of a multiple evaporator parallel defrost system provided herein;
in the figure: 1. a compressor; 2. a condenser; 3. a high pressure reservoir; 4. drying the filter; 5. a throttle valve; 6. a gas-liquid splitter; 7. a liquid pump; 8. an evaporator; 91. a first solenoid valve; 92. a second solenoid valve; 93. a third electromagnetic valve; 94. a fourth solenoid valve; 95. a non-return valve; 101. a first input pipe; 102. a first output pipe; 201. a second input pipe; 202. a second output pipe.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without any creative effort belong to the protection scope of the embodiments in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
The embodiment of the application discloses a defrosting system with multiple evaporators connected in parallel.
Referring to fig. 1, an embodiment of a multiple evaporator parallel defrosting system provided in an embodiment of the present application includes:
The refrigeration working process of the system of the application is as follows:
during refrigeration, the first electromagnetic valve 91 and the second electromagnetic valve 92 of the 1 st evaporator 8 to the nth evaporator 8 are opened, the third electromagnetic valve 93 and the fourth electromagnetic valve 94 are closed, the liquid pump 7 is opened, all the evaporators 8 operate simultaneously, refrigerant liquid at the bottom of the gas-liquid separator is respectively conveyed into all the evaporators 8 to be evaporated under the action of the liquid pump 7, the evaporated two-phase refrigerant returns to the gas-liquid separator, gas and liquid are separated in the separator, the gas is sucked away by the compressor 1, and the liquid sinks under the action of gravity to prepare for the next circulation.
The defrosting operation process of the system comprises the following steps:
when it is determined by the related imaging technique or the like that the thickness of the 1 st evaporator 8 reaches the set value, the 1 st evaporator 8 stops the cooling mode and shifts to the defrosting mode. The 2 nd evaporator 8 … … continues the cooling mode, and during specific operation, the first solenoid valve 91 and the second solenoid valve 92 of the 1 st evaporator 8 are closed, the third solenoid valve 93 and the fourth solenoid valve 94 are opened, the first solenoid valve 91 and the second solenoid valve 92 of the 2 nd evaporator 8 … … of the nth evaporator are opened, and the third solenoid valve 93 and the fourth solenoid valve 94 are closed; the refrigerant liquid which is not throttled from the high-pressure liquid storage device 3 enters the 1 st evaporator 8 through the third electromagnetic valve 93 of the 1 st evaporator 8, absorbs the cold energy of the frost layer of the 1 st evaporator 8, defrosts the 1 st evaporator 8 and simultaneously self-supercools the 1 st evaporator 8, and the supercooled refrigerant is mixed with the main path saturated liquid refrigerant after the fourth electromagnetic valve 94 and the check valve 95 of the 1 st evaporator 8, so that the main path liquid refrigerant is supercooled, and the refrigerating capacity is improved. It should be noted that, the 1 st station, the 2 nd station, etc. referred to in this application may be sorted according to a certain sorting rule, and are not limited.
When the defrosting of the 1 st evaporator 8 is finished, the 1 st evaporator 8 enters the cooling mode again, at this time, the first electromagnetic valve 91 and the second electromagnetic valve 92 of the 1 st evaporator 8 are opened, the third electromagnetic valve 93 and the fourth electromagnetic valve 94 are closed, and the electromagnetic valve switches of the other evaporators 8 are not changed.
At a certain moment, if the frost thickness of the other evaporator 8 reaches a specified value, for example, the 2 nd evaporator 8 has a refrigeration mode converted to a defrosting mode, and during specific operation, the first electromagnetic valve 91 and the second electromagnetic valve 92 of the 2 nd evaporator 8 are closed, the third electromagnetic valve 93 and the fourth electromagnetic valve 94 are opened, the first electromagnetic valve 91 and the second electromagnetic valve 92 of the other evaporator are opened, and the third electromagnetic valve 93 and the fourth electromagnetic valve 94 are closed; the refrigerant liquid which is not throttled from the high-pressure liquid storage device 3 enters the 2 nd evaporator 8 through the third electromagnetic valve 93 of the 2 nd evaporator 8, absorbs the cold energy of the frost layer of the 2 nd evaporator 8, defrosts the 2 nd evaporator 8 and simultaneously supercools the refrigerant, and the supercooled refrigerant is mixed with the main path saturated liquid refrigerant after the fourth electromagnetic valve 94 and the check valve 95 of the 2 nd evaporator 8, so that the main path liquid refrigerant is supercooled, and the refrigerating capacity is improved.
Other situations can be analogized based on the embodiment, and are not described in detail.
The system has the following beneficial effects:
1, can realize that many evaporimeters 8 defrost in turn, the reasonable frost layer of controlling keeps all evaporimeters 8 frostless or the state of few frost for refrigerating system does not shut down work. Under the condition that the evaporator 8 meets the heat exchange capacity of the system, at least one more evaporator 8 is used as a standby machine for defrosting, and refrigeration and defrosting are alternately operated, so that defrosting can be realized, the heat exchange capacity of the system can not be influenced, the defrosting efficiency is high, safety and reliability are realized, additional energy is not consumed, and the operation feasibility is high.
And 2, the refrigerant liquid absorbs the cold energy of the frost layer while defrosting, and then returns to the other evaporator 8, so that the cold energy of the frost layer is reasonably utilized, the refrigeration efficiency of the evaporator 8 receiving the defrosted refrigerant liquid is improved, the maximum utilization of energy is realized, the energy-saving effect is obvious, and the economic benefit is high.
3, the opening and closing of the electromagnetic valves are controlled to realize that a plurality of evaporators 8 can continuously defrost while refrigerating, so that the operation of the evaporators 8 is kept at a certain controllable value, and the temperature and the humidity of the room environment are ensured to be constant.
The above is a first embodiment of the multiple evaporator 8 parallel defrosting system provided in the embodiment of the present application, and the following is a second embodiment of the multiple evaporator 8 parallel defrosting system provided in the embodiment of the present application, specifically referring to fig. 1.
The scheme based on the first embodiment is as follows:
further, each second input pipe 201 may be specifically connected to the main conveying pipe at a position close to the dry filter 4. Each second input pipe 201 may be connected to the main pipe at a position close to the gas-liquid separator through a check valve. So that the second input line 201 carries un-throttled refrigerant liquid from the high pressure accumulator 3 and the second output line 202 carries back subcooled refrigerant liquid that mixes with the main path saturated liquid refrigerant.
Further, in a specific application, the number of the evaporators 8 may preferably be 4, and may be appropriately changed according to actual needs without limitation.
Further, the refrigerant liquid stored in the high-pressure liquid storage device 3 is liquid medium (high-pressure saturated liquid), the liquid medium is adopted for defrosting, the temperature of the used liquid medium is moderate, and the performance of the evaporator 8 can be prevented from being influenced.
While the multiple evaporator parallel defrosting system provided by the present application has been described in detail, those skilled in the art will appreciate that the present disclosure is not limited thereto, and that the present disclosure can be modified in various embodiments and applications.
Claims (5)
1. The defrosting system with the multiple evaporators connected in parallel is characterized by comprising n evaporators, wherein n is more than or equal to 3;
the n evaporators are arranged in parallel;
the input end of each evaporator is respectively connected with a first input pipe and a second input pipe, and the output end of each evaporator is respectively connected with a first output pipe and a second output pipe;
each first input pipe is connected to the liquid outlet end of the gas-liquid separator through a liquid pump, and a first electromagnetic valve is arranged on each first input pipe;
each first output pipe is uniformly connected to the input end of the gas-liquid separator, and a second electromagnetic valve is arranged on each first output pipe;
each second input pipe is connected to a main pipeline conveying pipe between a high-pressure liquid storage device and the gas-liquid separator in a unified mode and used for conveying unthrottled refrigerant liquid from the high-pressure liquid storage device, and each second input pipe is provided with a third electromagnetic valve;
each second output pipe is uniformly connected to the main pipeline conveying pipe between the high-pressure liquid storage device and the gas-liquid separator through a check valve and used for mixing the supercooled refrigerant liquid with the main pipeline saturated refrigerant liquid, and a fourth electromagnetic valve is arranged on each second output pipe.
2. The multiple evaporator parallel defrost system of claim 1 wherein each of said second input lines is connected in common to a main transfer line adjacent a dry filter.
3. The multiple evaporator parallel defrost system of claim 1 wherein each of said second input lines is connected in common to a main transport line through a check valve at a location adjacent to said gas-liquid separator.
4. The multiple evaporator parallel defrost system of claim 1 wherein said number of evaporators is specifically 4.
5. The multiple evaporator parallel defrost system of claim 1 wherein the refrigerant liquid stored in said high pressure accumulator is a liquid medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120833801.1U CN215216749U (en) | 2021-04-22 | 2021-04-22 | Defrosting system with multiple evaporators connected in parallel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120833801.1U CN215216749U (en) | 2021-04-22 | 2021-04-22 | Defrosting system with multiple evaporators connected in parallel |
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| Publication Number | Publication Date |
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| CN215216749U true CN215216749U (en) | 2021-12-17 |
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| CN202120833801.1U Active CN215216749U (en) | 2021-04-22 | 2021-04-22 | Defrosting system with multiple evaporators connected in parallel |
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- 2021-04-22 CN CN202120833801.1U patent/CN215216749U/en active Active
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