CN215176350U - High-temperature water chilling unit - Google Patents
High-temperature water chilling unit Download PDFInfo
- Publication number
- CN215176350U CN215176350U CN202120762826.7U CN202120762826U CN215176350U CN 215176350 U CN215176350 U CN 215176350U CN 202120762826 U CN202120762826 U CN 202120762826U CN 215176350 U CN215176350 U CN 215176350U
- Authority
- CN
- China
- Prior art keywords
- compressor
- temperature
- outlet
- expansion valve
- evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a high-temperature water chilling unit, which comprises a compressor, a condenser communicated with the air outlet of the compressor, a first electronic expansion valve communicated with the outlet of the condenser, an evaporator communicated with the outlet of the first electronic expansion valve, and a gas-liquid separator communicated with the refrigerant outlet of the evaporator, wherein the outlet of the gas-liquid separator is communicated with the air inlet of the compressor; the first electronic expansion valve and the evaporator are connected in parallel with a refrigeration bypass, a first temperature detection unit is arranged on an air outlet pipeline of the compressor, and a second temperature detection unit is arranged on an air inlet pipeline of the compressor. The utility model discloses an increase the refrigeration bypass in the refrigeration cycle, reduce the exhaust temperature of compressor, avoid refrigerating system's hydrojet too much or too little, prevent that the compressor liquid from hitting and can avoid exhaust temperature too high, improved the reliability and the stability of system.
Description
Technical Field
The utility model relates to a refrigeration plant, in particular to high temperature cooling water set.
Background
When the water chilling unit operates under the working condition of high water outlet temperature, the exhaust temperature is high due to the large degree of superheat of returned air, and the exhaust temperature protection is easy to occur. The exhaust temperature increases and the performance of the lubricant also decreases, affecting the reliability and stability of the system. Meanwhile, frequent exhaust temperature protection can cause large temperature fluctuation of the circulating fluid system, and normal use of users is affected.
In order to ensure the normal operation of the refrigeration system, a liquid spraying system is usually added in the refrigeration circuit, refrigerant liquid is throttled and depressurized and then is directly sprayed to a suction end, and the suction temperature of the compressor is reduced to reduce the discharge temperature. Ideally, the refrigerant mixed by the refrigerant after throttling and depressurizing the sprayed liquid and the superheated refrigerant at the outlet of the evaporator is in a saturated state, but the liquid spraying amount of the system is difficult to control in the actual operation process. Excessive liquid spraying amount can cause the liquid impact of the compressor, the compressor is easy to damage due to long-term hydraulic compression, the rising speed of the exhaust temperature can only be delayed if the liquid spraying amount is too small, and the problems of reliability and stability cannot be well solved.
SUMMERY OF THE UTILITY MODEL
Utility model purpose: the utility model provides a high temperature cooling water set, this cooling water set effective control refrigerant's hydrojet volume avoids too much or too little of hydrojet in the refrigeration cycle, prevents that the compressor liquid from hitting, avoids exhaust temperature too high, has improved the reliability and the stability of system.
The technical scheme is as follows: the utility model discloses a high temperature cooling water set, including the compressor, with the condenser of the gas outlet intercommunication of compressor, with the first electronic expansion valve of condenser export intercommunication, with the evaporimeter of the export intercommunication of first electronic expansion valve, with the vapour and liquid separator of the refrigerant export intercommunication of evaporimeter, the export of vapour and liquid separator is communicated with the air inlet of compressor; the first electronic expansion valve and the evaporator are connected in parallel with a refrigeration bypass, a first temperature detection unit is arranged on an air outlet pipeline of the compressor, and a second temperature detection unit is arranged on an air inlet pipeline of the compressor.
As an optimized mode of the present invention, the refrigeration bypass comprises a communication between an inlet of the first electronic expansion valve and a first pipeline of a refrigerant outlet of the evaporator and a second electronic expansion valve disposed on the first pipeline.
As a preferred mode of the present invention, the outlet of the condenser is provided with a dry filter.
As an optimized mode of the utility model, be provided with pressure sensor on the intake pipeline of compressor.
As an optimized mode of the present invention, a third temperature detecting unit is disposed on the water outlet pipeline of the evaporator.
As an optimized mode of the utility model, the water inlet of the evaporator is communicated with the water outlet of the water tank, and a water pump is arranged between the water inlet of the water tank and the evaporator.
As a preferred mode of the present invention, the condenser includes an air-cooled heat exchanger, a fan, and a motor.
As an optimized mode of the present invention, the first temperature detecting unit and the second temperature detecting unit are temperature sensors.
As an optimized mode of the present invention, the second electronic expansion valve is electrically connected to the first temperature detecting unit, the second temperature detecting unit and the pressure sensor.
As an optimized mode of the present invention, the first electronic expansion valve is electrically connected to the third temperature detecting unit.
Has the advantages that: (1) the high-temperature water chilling unit of the utility model reduces the exhaust temperature of the compressor by adding the refrigeration bypass in the refrigeration cycle; (2) the utility model discloses a refrigeration bypass is drawn forth in the export of condenser directly, through vapour and liquid separator mixed refrigerant to according to the compressor exhaust temperature that detects, the temperature of breathing in, suction pressure, the liquid jet volume of control avoids refrigerating system's hydrojet too much or too little, when preventing that the compressor liquid from hitting, avoids exhaust temperature too high, has improved the reliability and the stability of system.
Drawings
Fig. 1 is a system diagram of a high-temperature water chiller according to embodiment 1.
Detailed Description
Example 1: as shown in fig. 1, the high temperature water chilling unit of the present invention includes a compressor 1, a condenser 2, a first electronic expansion valve 3, an evaporator 4 and a gas-liquid separator 5. An air outlet of the compressor 1 is communicated with a condenser 2, an outlet of the condenser 2 is communicated with a first electronic expansion valve 3, an outlet of the first electronic expansion valve 3 is communicated with a refrigerant inlet of an evaporator 4, a refrigerant outlet of the evaporator 4 is communicated with a gas-liquid separator 5, and an outlet of the gas-liquid separator 5 is communicated with an air inlet of the compressor 1; the condenser 2 comprises an air-cooled heat exchanger, a fan and a motor 14; the air outlet pipeline of the compressor 1 is provided with a first temperature detection unit 6, the air inlet pipeline of the compressor 1 is provided with a second temperature detection unit 7, in this embodiment, the first temperature detection unit 6 and the second temperature detection unit 7 are both temperature sensors, and the air inlet pipeline of the compressor 1 is further provided with a pressure sensor 10.
The first electronic expansion valve 3 and the evaporator 4 are connected in parallel to form a refrigeration bypass 100, the refrigeration bypass 100 includes a first pipeline 101 for communicating an inlet of the first electronic expansion valve 3 with a refrigerant outlet of the evaporator 4, and the first pipeline 101 is provided with a second electronic expansion valve 8. Further, the outlet of the condenser 2 is provided with a dry filter 9. As shown in fig. 1, the refrigerant inlet of the first pipe 101 and the inlet of the first electronic expansion valve 3 are both in communication with the outlet of the dry filter 9.
The evaporator 4 further includes a circulation loop for circulating fluid such as chilled water, a water tank 12 and a water pump 13 are disposed at a water inlet of the evaporator 14, the water inlet of the evaporator 4 is communicated with a water outlet of the water tank 12, the water pump 13 is disposed between the water outlet of the water tank 12 and the water inlet of the evaporator 4, a third temperature detection unit 11 is disposed on a water outlet pipeline of the evaporator 4, and in this embodiment, the third temperature detection unit 11 is a temperature sensor.
In this embodiment, the opening ratio of the first electronic expansion valve 3 to the second electronic expansion valve 8 is adjustable. The first electronic expansion valve 3 is electrically connected to the third temperature detection unit 11, and adjusts the opening ratio according to the temperature of the circulating fluid detected by the third temperature sensor 11. The second electronic expansion valve 8 is electrically connected to the first temperature detection means 6, the second temperature detection means 7, and the pressure sensor 10, and the second electronic expansion valve 8 controls opening and closing according to the intake air temperature of the compressor 1 detected by the second temperature detection means 7 and the intake air pressure of the compressor 1 detected by the pressure sensor 10, and controls the opening ratio according to the exhaust air temperature of the compressor 1 detected by the first temperature detection means 6.
The working principle is as follows: the compressor 1 discharges high-temperature and high-pressure refrigerant, the refrigerant enters the condenser 2, the refrigerant is subjected to heat exchange with ambient air in the condenser 2 to be condensed into high-pressure liquid, the liquid discharged from the condenser 2 enters the evaporator 4 after being throttled and depressurized by the first electronic expansion valve 3, the refrigerant is subjected to heat exchange with circulating fluid in the evaporator 4 to be evaporated, and the evaporated gaseous refrigerant returns to the compressor 1 to complete the refrigeration cycle.
And calculating the suction superheat degree according to the suction temperature of the compressor 1 detected by the second temperature detection unit 7 and the suction pressure of the compressor 1 detected by the pressure sensor 10, when the suction superheat degree is higher than a set value, opening the second electronic expansion valve 8, throttling and depressurizing the refrigerant liquid of the refrigeration bypass 100 by the second electronic expansion valve 8, fully mixing the refrigerant liquid with the refrigerant at the outlet of the evaporator 4 in the gas-liquid separator 5, reducing the temperature, returning the cooled refrigerant gas to the suction end of the compressor 1, and continuously circulating. The second electronic expansion valve 8 adjusts the opening ratio according to the exhaust temperature of the compressor 1 detected by the first temperature detection unit 6, and when the temperature is high, the opening of the second electronic expansion valve 8 is adjusted to be large, otherwise, the opening is adjusted to be small. When the suction superheat is lower than the set value, the second electronic expansion valve 8 is closed.
Claims (10)
1. A high-temperature water chilling unit comprises a compressor (1), a condenser (2) communicated with an air outlet of the compressor (1), a first electronic expansion valve (3) communicated with an outlet of the condenser (2), an evaporator (4) communicated with an outlet of the first electronic expansion valve (3), and a gas-liquid separator (5) communicated with a refrigerant outlet of the evaporator (4), wherein an outlet of the gas-liquid separator (5) is communicated with an air inlet of the compressor (1); the refrigeration system is characterized in that the first electronic expansion valve (3) and the evaporator (4) are connected in parallel with a refrigeration bypass (100), a first temperature detection unit (6) is arranged on an air outlet pipeline of the compressor (1), and a second temperature detection unit (7) is arranged on an air inlet pipeline of the compressor (1).
2. A high temperature water chilling unit according to claim 1, wherein the refrigeration bypass (100) comprises a first line (101) communicating the inlet of the first electronic expansion valve (3) with the refrigerant outlet of the evaporator (4) and a second electronic expansion valve (8) provided on the first line (101).
3. A high temperature water chilling unit according to claim 1, characterized in that the outlet of the condenser (2) is provided with a dry filter (9).
4. A high-temperature water chilling unit according to claim 2, characterized in that a pressure sensor (10) is arranged on the air inlet pipeline of the compressor (1).
5. A high-temperature water chilling unit according to claim 1, characterized in that a third temperature detection unit (11) is arranged on the water outlet pipeline of the evaporator (4).
6. A high-temperature water chilling unit according to claim 5, characterized in that the water inlet of the evaporator (4) is communicated with the water outlet of the water tank (12), and a water pump (13) is arranged between the water tank (12) and the water inlet of the evaporator (4).
7. A high temperature chiller according to claim 1 wherein the condenser (2) comprises an air cooled heat exchanger, a fan and an electric motor (14).
8. A high temperature water chilling unit according to claim 1, wherein the first temperature detection unit (6) and the second temperature detection unit (7) are temperature sensors.
9. A high-temperature water chilling unit according to claim 4, characterized in that the second electronic expansion valve (8) is electrically connected with the first temperature detection unit (6), the second temperature detection unit (7) and the pressure sensor (10).
10. A high-temperature water chilling unit according to claim 5, wherein the first electronic expansion valve (3) is electrically connected with a third temperature detection unit (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120762826.7U CN215176350U (en) | 2021-04-14 | 2021-04-14 | High-temperature water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120762826.7U CN215176350U (en) | 2021-04-14 | 2021-04-14 | High-temperature water chilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215176350U true CN215176350U (en) | 2021-12-14 |
Family
ID=79357265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120762826.7U Active CN215176350U (en) | 2021-04-14 | 2021-04-14 | High-temperature water chilling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215176350U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117450716A (en) * | 2023-12-21 | 2024-01-26 | 江苏鹏江电子科技有限公司 | Liquid cooling source equipment capable of circulating cooling liquid |
-
2021
- 2021-04-14 CN CN202120762826.7U patent/CN215176350U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117450716A (en) * | 2023-12-21 | 2024-01-26 | 江苏鹏江电子科技有限公司 | Liquid cooling source equipment capable of circulating cooling liquid |
| CN117450716B (en) * | 2023-12-21 | 2024-03-12 | 江苏鹏江电子科技有限公司 | Liquid cooling source equipment capable of circulating cooling liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN200996753Y (en) | Refrigerating system of intermediate air-compensating compressor with economizer | |
| CN205939467U (en) | Multi -split air conditioning system | |
| CN109099610B (en) | Air-supplementing enthalpy-increasing refrigerating system, air conditioner and air conditioner control method | |
| CN2814269Y (en) | Refrigerating system capable of ejecting scavenge return | |
| KR100795568B1 (en) | Apparatus for exchaging heat using electronic expansion valve, external unit using electronic expansion valve and system for multi air-conditioner | |
| CN107238180B (en) | Air quantity control method and system of air-cooled water chilling unit | |
| EP4033179A1 (en) | Non-stop defrosting multi-connected hot water system and control method thereof | |
| CN103759449B (en) | The two-stage steam compression type circulatory system of dual jet synergy | |
| CN105004088A (en) | Cascaded water chilling unit for dual purposes of intermediate temperature and low temperature | |
| EP3762664A1 (en) | Cascade system for use in economizer compressor and related methods | |
| CN215176350U (en) | High-temperature water chilling unit | |
| CN114353383B (en) | Air source heat pump unit control method and air source heat pump unit | |
| CN112113364A (en) | Water chilling unit and control method | |
| CN216644600U (en) | Constant temperature water chilling unit | |
| CN110671834A (en) | Heat pump system and defrosting method thereof | |
| CN215765972U (en) | Refrigerating system and condensing unit | |
| CN115183517A (en) | Cascade hot fluorine defrosting type freezing and hot water dual supply unit | |
| CN211854312U (en) | High-efficient evaporation cooling formula cooling water set | |
| CN210463646U (en) | Heat pump system | |
| CN210951938U (en) | Water chilling unit | |
| CN219624277U (en) | Novel jet enthalpy-increasing compressor economizer assembly | |
| CN104279789B (en) | A kind of trilogy supply air-conditioning system | |
| CN112277988A (en) | Air conditioning unit for railway vehicle and control method | |
| CN111928506A (en) | Cooling device and control method | |
| CN201983539U (en) | Low-temperature water chilling unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |