CN211233473U - Air-cooled perennial refrigerating unit - Google Patents
Air-cooled perennial refrigerating unit Download PDFInfo
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- CN211233473U CN211233473U CN201922413121.XU CN201922413121U CN211233473U CN 211233473 U CN211233473 U CN 211233473U CN 201922413121 U CN201922413121 U CN 201922413121U CN 211233473 U CN211233473 U CN 211233473U
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- 230000005494 condensation Effects 0.000 claims abstract description 15
- 238000009833 condensation Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 5
- 239000003507 refrigerant Substances 0.000 abstract description 7
- 230000008676 import Effects 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model belongs to the technical field of refrigeration equipment, in particular to an air-cooled perennial refrigeration unit, which comprises a heat exchange loop and a condensation pressure control loop; the heat exchange loop comprises a compressor (1), a condenser (2), a one-way valve (3), a liquid storage device (4), an expansion valve (5), an evaporator (6), a gas-liquid separator (7), a condensation pressure control loop comprises an electromagnetic valve (10) and a condensation pressure control valve (11) which are connected in series through a pipeline, one end of the electromagnetic valve (10) is connected with a B interface of the condensation pressure control valve (11) through a pipeline, the other end of the electromagnetic valve (10) is located at an exhaust port of the compressor (1) through a pipeline and is connected with the exhaust port of the compressor (1), and a C interface and an R interface of the condensation pressure control valve (11) are connected in series between the condenser (2). The utility model discloses increase condensing pressure control circuit in refrigerating unit, when condensing pressure is lower, export partial refrigerant from condenser import bypass to the condenser, reach control condensing pressure's purpose.
Description
Technical Field
The utility model belongs to the technical field of refrigeration plant, specifically an air-cooled perennial refrigerating unit.
Background
The condensing pressure depends on the temperature and flow rate of the cooling medium, the condensing area, the type of the condenser, and so on. Too high or too low a condensing pressure can adversely affect the refrigeration system. For a common refrigerating unit, the unit can stably operate within a certain pressure range due to a small temperature variation range of a cooling medium, but for a perennial refrigerating unit, the temperature variation range of the cooling medium is large due to season change, and particularly in winter, the condensing pressure of the unit is too low to work normally.
At present, the air-cooled type perennial refrigerating unit mostly adopts the change of air quantity (flow of cooling medium) to achieve the purpose of controlling condensation pressure. The general unit uses many speed fans, stops through opening of control fan wind speed and fan and realizes, nevertheless because the characteristic of fan self, the amount of wind of low-speed wind can not infinitely reduce, and when ambient temperature was very low, the amount of wind was still very big, and it is frequent that the fan stops to appear opening, causes the system unstability, has also shortened the life of fan simultaneously. The air quantity is also adjusted by the frequency conversion fan, the adjusting range is large, the requirement can be basically met, but the mode is complex to control, the cost is high, and the air quantity can not be used in a large range.
Based on the above situation, the control system adopting the multi-speed fan is optimized, so that the unit can stably run in a low-temperature environment.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at the not enough of prior art, provide an air-cooled perennial refrigerating unit, this application increases condensation pressure control circuit in refrigerating unit, and the condensation pressure control valve can be under the lower condition of condensation pressure, with partial refrigerant from condenser import bypass to condenser export to reach the purpose of control condensation pressure.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an air-cooled perennial refrigerating unit comprises a heat exchange loop and a condensing pressure control loop,
the heat exchange loop comprises a compressor, a condenser, a one-way valve, a liquid storage device, an expansion valve, an evaporator and a gas-liquid separator which are sequentially connected in series through a pipeline, wherein an exhaust port of the compressor is connected with an inlet end of the condenser, an outlet end of the gas-liquid separator is connected with an air suction port of the compressor, an outdoor fan is arranged on one side of the condenser, and an indoor fan is arranged on one side of the evaporator;
the condensing pressure control loop comprises an electromagnetic valve and a condensing pressure control valve which are connected in series through a pipeline, one end of the electromagnetic valve is connected with a B interface of the condensing pressure control valve through a pipeline, the other end of the electromagnetic valve is connected with an exhaust port of the compressor through a pipeline, and a C interface and an R interface of the condensing pressure control valve are connected between the condenser and the one-way valve in series.
Furthermore, the outdoor fan adopts a double-speed fan.
The utility model has the advantages that:
the application optimizes the original method for controlling the condensing pressure by adopting the multi-speed fan, a condensing pressure control loop is added in the refrigerating unit, and a condensing pressure control valve can bypass part of the refrigerant from the inlet of the condenser to the outlet of the condenser under the condition of lower condensing pressure, thereby achieving the purpose of controlling the condensing pressure.
The condensing pressure control valve is controlled mechanically, and the original control of the unit is not required to be changed; in addition, the pressure of the condensing pressure control valve can be set, and different refrigerants or different pressures can be set; in addition, a loop of the condensing pressure control valve is connected with an electromagnetic valve in series, and a coil of the electromagnetic valve is connected to a normally-open point of the low-speed wind alternating current contactor, so that the valve only acts when the ambient temperature is low, and the stability of the system is ensured.
Drawings
FIG. 1 is a block diagram schematically illustrating the structure of the closed state of the solenoid valve according to the present invention in the embodiment;
FIG. 2 is a block diagram schematically illustrating the open state of the solenoid valve according to the present invention in the embodiment;
FIG. 3 is a block diagram of the circuit connection between the electromagnetic valve and the low-speed wind AC contactor in the embodiment.
Reference numbers in the figures: 1-a compressor, 2-a condenser, 3-a one-way valve, 4-a liquid storage device, 5-an expansion valve, 6-an evaporator, 7-a gas-liquid separator, 8-an outdoor fan and 9-an indoor fan; 10-electromagnetic valve, 11-condensing pressure control valve, 12-low speed wind AC contactor.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in fig. 1, the utility model discloses an air-cooled perennial refrigerating unit, which comprises a heat exchange loop and a condensation pressure control loop. The heat exchange loop comprises a compressor 1, a condenser 2, a one-way valve 3, a liquid storage device 4, an expansion valve 5, an evaporator 6 and a gas-liquid separator 7 which are sequentially connected in series through pipelines, wherein an exhaust port of the compressor 1 is connected with an inlet end of the condenser 2, an outlet end of the gas-liquid separator 7 is connected with an air suction port of the compressor 1, an outdoor fan 8 is arranged on one side of the condenser 2, the outdoor fan 8 adopts a double-speed fan, and an indoor fan 9 is arranged on one side of the evaporator 6; the condensing pressure control loop comprises an electromagnetic valve 10 and a condensing pressure control valve 11 which are connected in series through a pipeline, one end of the electromagnetic valve 10 is connected to a port B of the condensing pressure control valve 11 through a pipeline, the other end of the electromagnetic valve 10 is connected to an exhaust port of the compressor 1 through a pipeline, a port C and a port R of the condensing pressure control valve 11 are connected in series between the condenser 2 and the check valve 3, and as shown in fig. 2, a coil of the electromagnetic valve 10 is connected to a normally-open point of a low-speed wind alternating current contactor 12 of the outdoor fan 8.
The working principle is as follows:
as shown in fig. 1, when the outdoor environment temperature is high, the outdoor fan is operated at high speed, the electromagnetic valve is closed, and the refrigerant flow direction is: compressor → condenser → interface of the condensing pressure control valve C → interface of the condensing pressure control valve R → one-way valve → accumulator → expansion valve → evaporator → gas-liquid separator → compressor;
as shown in fig. 2, when the outdoor ambient temperature is low, the outdoor fan operates at a low speed, the solenoid valve is opened, and the refrigerant flow direction is: compressor → condenser + solenoid valve → B + C interface of the condensing pressure control valve → interface of the condensing pressure control valve R → one-way valve → accumulator → expansion valve → evaporator → gas-liquid separator → compressor, the refrigerant flow rate of the B interface of the condensing pressure control valve → R interface of the condensing pressure control valve is adjusted according to the condensing pressure, when the condensing pressure is high, the flow rate of the B interface of the condensing pressure control valve → R of the condensing pressure control valve is reduced, and when the condensing pressure is low, the flow rate of the B interface of the condensing pressure control valve → R of the condensing pressure control valve is increased.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent replacements made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (2)
1. An air-cooled perennial refrigerating unit is characterized in that: comprises a heat exchange loop and a condensing pressure control loop;
the heat exchange loop comprises a compressor (1), a condenser (2), a one-way valve (3), a liquid storage device (4), an expansion valve (5), an evaporator (6) and a gas-liquid separator (7) which are sequentially connected in series through pipelines, wherein an exhaust port of the compressor (1) is connected with an inlet end of the condenser (2), an outlet end of the gas-liquid separator (7) is connected with an air suction port of the compressor (1), an outdoor fan (8) is arranged on one side of the condenser (2), and an indoor fan (9) is arranged on one side of the evaporator (6);
the condensation pressure control loop comprises an electromagnetic valve (10) and a condensation pressure control valve (11) which are connected in series through a pipeline, one end of the electromagnetic valve (10) is connected with a B interface of the condensation pressure control valve (11) through a pipeline, the other end of the electromagnetic valve (10) is connected with an exhaust port of the compressor (1) through a pipeline, and a C interface and an R interface of the condensation pressure control valve (11) are connected in series between the condenser (2) and the one-way valve (3).
2. The air-cooled perennial refrigeration unit of claim 1, wherein: the outdoor fan (8) adopts a double-speed fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922413121.XU CN211233473U (en) | 2019-12-29 | 2019-12-29 | Air-cooled perennial refrigerating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922413121.XU CN211233473U (en) | 2019-12-29 | 2019-12-29 | Air-cooled perennial refrigerating unit |
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| Publication Number | Publication Date |
|---|---|
| CN211233473U true CN211233473U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922413121.XU Active CN211233473U (en) | 2019-12-29 | 2019-12-29 | Air-cooled perennial refrigerating unit |
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| Country | Link |
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| CN (1) | CN211233473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377998A (en) * | 2020-11-04 | 2021-02-19 | 同济大学 | All-condition heat pump heat recovery type fresh air fan with multiple reheating modes |
-
2019
- 2019-12-29 CN CN201922413121.XU patent/CN211233473U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377998A (en) * | 2020-11-04 | 2021-02-19 | 同济大学 | All-condition heat pump heat recovery type fresh air fan with multiple reheating modes |
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No.958, Ming'an Road, Huangdao District, Qingdao City, Shandong Province 266490 Patentee after: Qingdao Aolikai Energy Co.,Ltd. Address before: No.958, Ming'an Road, Huangdao District, Qingdao City, Shandong Province 266490 Patentee before: QINGDAO ALKKT CENTRAL AIR CONDITIONER CO.,LTD. |
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| CP03 | Change of name, title or address |