CN203478668U - Device for controlling liquid supply amount of flooded type screw unit - Google Patents
Device for controlling liquid supply amount of flooded type screw unit Download PDFInfo
- Publication number
- CN203478668U CN203478668U CN201320593226.8U CN201320593226U CN203478668U CN 203478668 U CN203478668 U CN 203478668U CN 201320593226 U CN201320593226 U CN 201320593226U CN 203478668 U CN203478668 U CN 203478668U
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- unit
- temperature sensor
- liquid supply
- flooded
- screw unit
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Abstract
The utility model discloses a device for controlling the liquid supply amount of a flooded type screw unit. The device comprises pressure sensors and a temperature sensor, wherein the pressure sensors and the temperature sensor are in signal communication with a PLC. The pressure sensors are arranged on a condenser and a flooded type evaporator respectively. The temperature sensor is arranged on a connecting pipeline of a compressor. The device for controlling the liquid supply amount of the flooded type screw unit is simple in structure and gentler and more flexible in the working condition switching process, damage to the unit caused by the working condition change is reduced, and the service life of the unit is prolonged. Adjustment can be well conducted when the unit is in a running area outside the design, and the unit is protected as much as possible. Particularly, the unit where the working condition changes greatly can be better adjusted. The device has good practicability.
Description
Technical field
The utility model belongs to air-conditioning technical field, is specifically related to a kind of control device of liquid supply rate of flooded screw unit.
Background technology
Flooded screw unit, the loop being formed by connecting by pipeline by compressor, condenser, electric expansion valve and flooded evaporator forms, in existing this flooded screw unit, its liquid supply rate does not have corresponding control device, can not meet user demand.
Utility model content
Goal of the invention: for the deficiencies in the prior art, the purpose of this utility model is to provide a kind of control device of liquid supply rate of flooded screw unit, realizes the effective control to liquid supply rate, meets user demand.
Technical scheme: for achieving the above object, the technical solution adopted in the utility model is as follows:
A control device for the liquid supply rate of flooded screw unit, comprises the pressure sensor and the temperature sensor that all carry out signal and communication with PLC; Described pressure sensor all has setting on condenser and flooded evaporator; Described temperature sensor is located on compressor connecting line.
Described pressure sensor comprises inspiratory pressure sensor and back pressure transducer; Wherein, inspiratory pressure sensor is located on flooded evaporator, and back pressure transducer is located on condenser.
Described temperature sensor comprises suction temperature sensor and exhaust gas temperature sensor; Wherein, suction temperature sensor is located on the connecting line between compressor and flooded evaporator, and exhaust gas temperature sensor is located on the connecting line between compressor and condenser.
Beneficial effect: compared with prior art, the control device of the liquid supply rate of flooded screw unit of the present utility model, simple in structure, softer, sensitiveer when switching operating mode, reduce and change the injury of operating mode to unit, extend unit durability; Unit in design outside operation area time also can well regulate, the protection unit of maximum possible; Particularly for the violent unit of working conditions change, there is better regulating action; There is good practicality.
Accompanying drawing explanation
Fig. 1 is the structural representation of control device of the liquid supply rate of flooded screw unit.
The specific embodiment
Below in conjunction with accompanying drawing, further illustrate the utility model.
As shown in Figure 1, the control device of the liquid supply rate of flooded screw unit, this flooded screw unit, the loop being formed by connecting by pipeline by compressor 7, condenser 8, electric expansion valve 9 and flooded evaporator 6 forms.This control device comprises pressure sensor and the temperature sensor that all carries out signal and communication with PLC1; Pressure sensor comprises inspiratory pressure sensor 2 and back pressure transducer 5; Wherein, inspiratory pressure sensor 2 is located on flooded evaporator 6, and back pressure transducer 5 is located on condenser 8.Temperature sensor comprises suction temperature sensor 3 and exhaust gas temperature sensor 4; Wherein, suction temperature sensor 3 is located on the connecting line between compressor 7 and flooded evaporator 6, and exhaust gas temperature sensor 4 is located on the connecting line between compressor 7 and condenser 8.
The control device of the liquid supply rate of flooded screw unit, refrigerant is entered by compressor 7 air entries, after compressor compression, from exhaust outlet, discharges and enters electric expansion valve via heat exchanger.After electric expansion valve, again circulate entering compressor air suction mouth.The size of liquid supply rate determines by the aperture of expansion valve, and it is more that expansion valve is opened the refrigerant passing through more greatly.
The control device of the liquid supply rate of flooded screw unit of the present utility model, simple in structure, softer, sensitiveer when switching operating mode, reduce and change the injury of operating mode to unit, extend unit durability; Unit in design outside operation area time also can well regulate, the protection unit of maximum possible; Particularly for the violent unit of working conditions change, there is better regulating action; There is good practicality.
Claims (3)
1. a control device for the liquid supply rate of flooded screw unit, is characterized in that: comprise all and PLC(1) carry out pressure sensor and the temperature sensor of signal and communication; Described pressure sensor all has setting on condenser (8) and flooded evaporator (6); Described temperature sensor is located on compressor (7) connecting line.
2. the control device of the liquid supply rate of flooded screw unit according to claim 1, is characterized in that: described pressure sensor comprises inspiratory pressure sensor (2) and back pressure transducer (5); Wherein, it is upper that inspiratory pressure sensor (2) is located at flooded evaporator (6), and back pressure transducer (5) is located on condenser (8).
3. the control device of the liquid supply rate of flooded screw unit according to claim 2, is characterized in that: described temperature sensor comprises suction temperature sensor (3) and exhaust gas temperature sensor (4); Wherein, suction temperature sensor (3) is located on the connecting line between compressor (7) and flooded evaporator (6), and exhaust gas temperature sensor (4) is located on the connecting line between compressor (7) and condenser (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320593226.8U CN203478668U (en) | 2013-09-25 | 2013-09-25 | Device for controlling liquid supply amount of flooded type screw unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320593226.8U CN203478668U (en) | 2013-09-25 | 2013-09-25 | Device for controlling liquid supply amount of flooded type screw unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203478668U true CN203478668U (en) | 2014-03-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320593226.8U Expired - Lifetime CN203478668U (en) | 2013-09-25 | 2013-09-25 | Device for controlling liquid supply amount of flooded type screw unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203478668U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707049A (en) * | 2020-06-09 | 2020-09-25 | 西安交通大学 | Refrigerant mass flow control system and method for pump barrel liquid supply refrigeration system |
-
2013
- 2013-09-25 CN CN201320593226.8U patent/CN203478668U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111707049A (en) * | 2020-06-09 | 2020-09-25 | 西安交通大学 | Refrigerant mass flow control system and method for pump barrel liquid supply refrigeration system |
| CN111707049B (en) * | 2020-06-09 | 2021-04-20 | 西安交通大学 | Refrigerant mass flow control system and method for pump barrel liquid supply refrigeration system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |