CN216924585U - Water chilling unit - Google Patents
Water chilling unit Download PDFInfo
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- CN216924585U CN216924585U CN202122178621.7U CN202122178621U CN216924585U CN 216924585 U CN216924585 U CN 216924585U CN 202122178621 U CN202122178621 U CN 202122178621U CN 216924585 U CN216924585 U CN 216924585U
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- refrigerant pipeline
- compressor
- refrigerant
- condenser
- water chilling
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The utility model belongs to the technical field of air conditioner heat exchange, and particularly provides a water chilling unit. The utility model aims to solve the problems of low energy efficiency, complex pipeline switching, low system reliability and the like of the existing water chilling unit. For the purpose, the water chilling unit comprises a compressor, a condenser, a first throttling device, a flash evaporation barrel, a second throttling device and an evaporator, wherein the compressor is connected with the condenser through a first refrigerant pipeline; the condenser is connected with the flash evaporation barrel through a second refrigerant pipeline, and the first throttling device is arranged on the second refrigerant pipeline; the flash barrel is connected with the evaporator through a third refrigerant pipeline, and the second throttling device is arranged on the third refrigerant pipeline; the evaporator is connected with the compressor through a fourth refrigerant pipeline. The flash evaporation barrel is applied to a refrigerant system of the air conditioner, gas-liquid bidirectional circulation can be achieved, and the compressor can be supplemented with air in the refrigeration process of the air conditioner, so that the working efficiency of the air conditioner is improved.
Description
Technical Field
The utility model belongs to the technical field of air conditioner heat exchange, and particularly provides a water chilling unit.
Background
Most of the existing market central air conditioning units are conventional water chilling units, cooling tower cooling circulating water is additionally arranged, the pipeline connection is complex, and the unit energy efficiency is low; lubricating oil is mostly used in the existing water chilling unit, the lubricating oil and a refrigerant are mixed together to circulate in a system and flow through a heat exchanger, a layer of oil film is formed in a heat exchange tube, the energy efficiency of the system is influenced, and the longer the service time is, the greater the performance attenuation is. Therefore, energy conservation and environmental protection are development trends of air conditioning systems, most of the existing markets are conventional screw machines and common centrifuges, and the existing screw water chilling units are low in energy efficiency and do not meet the national carbon neutralization energy-saving requirements; the common centrifugal machine is mostly applied to items with large cooling capacity requirements, is not suitable for small cooling capacity machine types, is high in cost for common water-cooling magnetic suspension external cooling tower type water chilling units, and needs to provide a machine room independently to occupy space. In addition, in the refrigeration process of the air conditioner, in order to improve the working efficiency of the air conditioner, air needs to be supplied to a compressor of the air conditioner, and the traditional water chilling unit is complex in pipeline switching and low in system reliability.
Accordingly, there is a need in the art for a chiller unit that solves the problems of low energy efficiency, complex pipeline switching, low system reliability, non-compliance with energy conservation standards, and unsuitability for small chiller models, resulting in high cost, large footprint, and the like.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, namely to solve the problems that the existing water chilling unit is low in energy efficiency, complex in pipeline switching, low in system reliability, not suitable for a small-sized cold machine type without meeting an energy-saving standard, high in cost, large in occupied space and the like, the utility model provides a water chilling unit which comprises a compressor, a condenser, a first throttling device, a flash evaporation barrel, a second throttling device and an evaporator, wherein the compressor is connected with the condenser through a first refrigerant pipeline; the condenser is connected with the flash evaporation barrel through a second refrigerant pipeline, and the first throttling device is arranged on the second refrigerant pipeline; the flash barrel is connected with the evaporator through a third refrigerant pipeline, and the second throttling device is arranged on the third refrigerant pipeline; the evaporator is connected with the compressor through a fourth refrigerant pipeline.
In a preferred technical scheme of the water chilling unit, a check valve is further arranged on the first refrigerant pipeline, the water chilling unit further comprises a fifth refrigerant pipeline, one end of the fifth refrigerant pipeline is arranged between the check valve and the condenser, the other end of the fifth refrigerant pipeline is communicated with a barrel of the evaporator, and a load balancing valve is further arranged on the fifth refrigerant pipeline.
In the preferable technical scheme of the water chilling unit, the water chilling unit further comprises a sixth refrigerant pipeline, one end of the sixth refrigerant pipeline is connected to the upper portion of the flash evaporation barrel, and the other end of the sixth refrigerant pipeline is connected to the air inlet of the compressor.
In the preferred technical scheme of the water chilling unit, the water chilling unit further comprises a seventh refrigerant pipeline, one end of the seventh refrigerant pipeline is connected to the bottom of the flash evaporation barrel, the other end of the seventh refrigerant pipeline is connected to a motor cooling system of the compressor, and a refrigerant pump is further arranged on the seventh refrigerant pipeline.
In the preferred technical scheme of the water chilling unit, the water chilling unit further comprises an eighth refrigerant pipeline, one end of the eighth refrigerant pipeline is connected to the seventh refrigerant pipeline between the refrigerant pump and the motor cooling system of the compressor, the other end of the eighth refrigerant pipeline is connected to the flash barrel, and the eighth refrigerant pipeline is further provided with a pressure regulating valve.
In a preferred technical solution of the above water chilling unit, the compressor is a magnetic levitation compressor.
In the preferable technical scheme of the water chilling unit, the condenser is an evaporative condenser.
In a preferred embodiment of the water chilling unit, the first throttling device and the second throttling device are electronic expansion valves.
In the preferable technical scheme of the water chilling unit, the flash evaporation barrel and the evaporator are also provided with liquid level meters.
In the preferred technical scheme of the water chilling unit, ball valves are further arranged between the condenser and the first throttling device, between the flash barrel and the refrigerant pump, between the flash barrel and the second throttling device, and between the second throttling device and the evaporator; butterfly valves are arranged between the condenser and the compressor and on the fourth refrigerant pipeline; and a safety valve is also arranged between the condenser and the compressor.
The technical scheme of the utility model provides a water chilling unit, which comprises a compressor, a condenser, a first throttling device, a flash evaporation barrel, a second throttling device and an evaporator, wherein the compressor is connected with the condenser through a first refrigerant pipeline; the condenser is connected with the flash evaporation barrel through a second refrigerant pipeline, and the first throttling device is arranged on the second refrigerant pipeline; the flash barrel is connected with the evaporator through a third refrigerant pipeline, and the second throttling device is arranged on the third refrigerant pipeline; the evaporator is connected with the compressor through a fourth refrigerant pipeline.
By the arrangement mode, the refrigerating capacity and the energy efficiency of the water chilling unit are improved, the flash evaporation barrel is applied to a refrigerant system of the air conditioner, gas-liquid bidirectional circulation can be achieved, the compressor can be replenished with air in the refrigerating process of the air conditioner, the working efficiency of the air conditioner is improved, and the problems that the traditional water chilling unit is complex in pipeline switching and low in system reliability are solved.
Drawings
The water chiller of the present invention is described below with reference to the accompanying drawings. In the drawings:
fig. 1 is a schematic view of a connection relationship of a water chiller according to the present invention.
List of reference numerals:
1-condenser, 111-fan, 112-water replenishing pump, 113-water tank, 2-compressor, 21-air inlet, 3-flash barrel, 4-evaporator, 41-water outlet, 42-water inlet, 5-first throttling device, 6-second throttling device, 7-first refrigerant pipeline, 71-one-way valve, 8-second refrigerant pipeline, 9-third refrigerant pipeline, 10-fourth refrigerant pipeline, 11-butterfly valve, 12-fifth refrigerant pipeline, 121-load balancing valve, 13-sixth refrigerant pipeline, 14-seventh refrigerant pipeline, 141-refrigerant pump, 15-eighth refrigerant pipeline, 151-pressure regulating valve, 16-liquid level meter, 17-safety valve, 18-ball valve and 19-angle valve.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, although the description has been made with the first and second throttle valves of the evaporative water chiller, it is obvious that the present invention may employ the first and second speed control valves as long as the speed control valves can adjust and control the size of the openings in the valves to directly restrict the flow of the fluid therethrough to achieve the throttling effect.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. 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.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, the water chiller of the present invention is described.
As shown in fig. 1, in order to solve the problems that the existing water chilling unit has low energy efficiency, complicated pipeline switching, low system reliability, no energy-saving standard, high cost, large occupied space and the like, and is not suitable for small-capacity machines, the water chilling unit of the utility model comprises a compressor 2, a condenser 1, a first throttling device 5, a flash evaporation barrel 3, a second throttling device 6 and an evaporator 4, wherein the compressor 2 is connected with the condenser 1 through a first refrigerant pipeline 7; the condenser 1 is connected with the flash evaporation barrel 3 through a second refrigerant pipeline 8, and the first throttling device 5 is arranged on the second refrigerant pipeline 8; the flash barrel 3 is connected with the evaporator 4 through a third refrigerant pipeline 9, and the second throttling device 6 is arranged on the third refrigerant pipeline 9; the evaporator 4 is connected to the compressor 2 via a fourth refrigerant line 10.
When the refrigeration operation is started, the compressor 2 sucks low-temperature and low-pressure refrigerant gas from the evaporator 4, the refrigerant is compressed into high-temperature and high-pressure gaseous refrigerant by the compressor 2, the high-temperature and high-pressure gaseous refrigerant is discharged from the exhaust port, then enters the condenser 1 through the first refrigerant pipeline 7, heat is taken away through the condenser 1, and meanwhile, the gaseous refrigerant is condensed by the condenser 1 and is changed into high-temperature and high-pressure refrigerant liquid after being condensed. After passing through the second refrigerant pipeline 8 and the first throttling device 5, the high-temperature high-pressure refrigerant liquid becomes medium-temperature medium-pressure supercooled refrigerant liquid, then enters the flash evaporation barrel 3, flows through the second throttling device 6 on the third refrigerant pipeline 9 from the bottom of the flash evaporation barrel 3 to become low-temperature low-pressure refrigerant liquid, finally enters the evaporator 4 to absorb the heat of chilled water, and the evaporated refrigerant gas is sucked into the compressor 2 through the fourth refrigerant pipeline 10 to complete a refrigeration main cycle. In addition, a water replenishing pump 112, a fan 111 and a water tank 113 are arranged in the condenser 1, the water replenishing pump 112 and the fan 111 can be set to be variable frequency or fixed frequency, and the rotating speed of the water replenishing pump 112 and the rotating speed of the fan 111 are adjusted by detecting the temperature in the evaporation cold water tank in the operation process.
The water chiller of the present invention is described in detail below with further reference to fig. 1.
As shown in fig. 1, in one possible embodiment, a check valve 71 is further disposed on the first refrigerant pipeline 7, the chiller further includes a fifth refrigerant pipeline 12, one end of the fifth refrigerant pipeline 12 is disposed between the check valve 71 and the condenser 1, the other end of the fifth refrigerant pipeline 12 is communicated with the cylinder of the evaporator 4, and a load balance valve 121 is further disposed on the fifth refrigerant pipeline 12. Preferably, in a possible embodiment, the water chilling unit further includes a sixth refrigerant pipeline 13, and one end of the sixth refrigerant pipeline 13 is connected to the upper portion of the flash tank 3, and the other end is connected to the air inlet 21 of the compressor 2.
A check valve 71 is further disposed on the first refrigerant pipeline 7 to ensure that the refrigerant flows into the first refrigerant pipeline 7 after passing through the compressor 2, and circularly flows back to the condenser 1. The fifth refrigerant pipeline 12 is provided with a load balance valve 121, and when the compressor 2 is just started or stopped or when the compressor 2 runs at a low load, the load balance valve 121 is opened to play a role in overload protection for the compressor 2. And because the inside of the flash evaporation barrel 3 is in a state of medium temperature and medium pressure, the top of the flash evaporation barrel 3 is in a gas state, and the lower part of the flash evaporation barrel 3 is in a liquid state, so that the gas at the top of the flash evaporation barrel 3 can better enter the compressor 2 and pass through the gas inlet and air supplement port, a sixth refrigerant pipeline 13 is connected between the upper part of the flash evaporation barrel 3 and the gas inlet 21 of the compressor 2, and the part of the gas refrigerant flows out from the sixth refrigerant pipeline 13 at the upper part of the flash evaporation barrel 3 and enters the gas inlet 21 of the compressor 2 through the sixth refrigerant pipeline 13 to complete the air supplement circulation. The arrangement mode increases the circulation quantity of the refrigerant, and can increase the refrigerating capacity of the unit and improve the energy efficiency of the system.
As shown in fig. 1, in a possible embodiment, the water chilling unit further includes a seventh refrigerant pipeline 14, one end of the seventh refrigerant pipeline 14 is connected to the bottom of the flash tank 3, the other end of the seventh refrigerant pipeline 14 is connected to the motor cooling system of the compressor 2, and a refrigerant pump 141 is further disposed on the seventh refrigerant pipeline 14. Preferably, in a possible embodiment, the water chilling unit further includes an eighth refrigerant pipeline 15, one end of the eighth refrigerant pipeline 15 is connected to the seventh refrigerant pipeline 14 between the refrigerant pump 141 and the motor cooling system of the compressor 2, the other end of the eighth refrigerant pipeline 15 is connected to the flash tank 3, and the eighth refrigerant pipeline 15 is further provided with a pressure regulating valve 151.
In order to cool the motor of the compressor 2, a seventh refrigerant pipeline 14 is arranged on the water chilling unit, one end of the seventh refrigerant pipeline 14 is connected to the bottom of the flash evaporation barrel 3, the other end of the seventh refrigerant pipeline is connected with the motor cooling system of the compressor 2, and when the liquid refrigerant flows out of the bottom of the flash evaporation barrel 3 and then passes through a refrigerant pump 141 arranged on the seventh refrigerant pipeline 14, the effect of cooling the motor of the compressor 2 can be achieved. By this control, it is ensured that the refrigerant pump 141 operates, the compressor 2 is turned off, and the refrigerant pump 141 is turned off during the start-up of the compressor 2. Because the inside of the motor cooling hole of the compressor 2 is provided with an electromagnetic valve (not shown) of the compressor 2, the compressor 2 is controlled by the manufacturer independently (the temperature of the motor is more than 44 ℃ and is less than 42 ℃). When the refrigerant pump 141 is operated, in order to prevent the refrigerant pump 141 from being damaged due to rotation blockage, the eighth refrigerant pipeline 15 is introduced, the eighth refrigerant pipeline 15 is further provided with a pressure regulating valve 151, and when the temperature of the motor of the compressor 2 is low and the cooling electromagnetic valve is in a closed state, the pressure is released through the pressure regulating valve 151.
Preferably, in another possible embodiment, the compressor 2 is a magnetic levitation compressor and the condenser 1 is an evaporative condenser 1. The first throttle 5 and the second throttle 6 are electronic expansion valves. Liquid level meters 16 are also arranged on the flash barrel 3 and the evaporator 4. Preferably, in another possible embodiment, ball valves 18 are further arranged between the condenser 1 and the first throttling device 5, between the flash drum 3 and the refrigerant pump 141, between the flash drum 3 and the second throttling device 6, and between the second throttling device 6 and the evaporator 4; a butterfly valve 11 is arranged between the condenser 1 and the compressor 2 and on the fourth refrigerant pipeline 10; a safety valve 17 is also provided between the condenser 1 and the compressor 2.
The magnetic suspension compressor has the advantages that the starting current is small, the field wiring is convenient, the compressor 2 adopts stepless variable frequency regulation and is combined with an excellent control program, the temperature measurement control precision of a user can be greatly improved, in addition, compared with the same refrigeration capacity, the efficiency of the unit is the highest, the whole system is oil-free, the whole system is used for a long time, and the performance attenuation of the whole machine is negligible. The evaporative condenser 1 is selected, so that the main machine condenser 1 and an external cooling tower part can be omitted, the occupied area of the whole machine is reduced, part of the cost of the whole machine can be reduced, and the initial investment of customers is reduced. In addition, ball valves 18 are arranged between the condenser 1 and the first throttling device 5, between the flash drum 3 and the refrigerant pump 141, between the flash drum 3 and the second throttling device 6, and between the second throttling device 6 and the evaporator 4; a butterfly valve 11 is also arranged between the condenser 1 and the compressor 2 and on the fourth refrigerant pipeline 10; a safety valve 17 is also provided between the condenser 1 and the compressor 2 to ensure smooth circulation of the refrigerant through the respective lines.
In conclusion, the arrangement mode of the utility model improves the refrigerating capacity and energy efficiency of the water chilling unit, the flash evaporation barrel is applied to the refrigerant system of the air conditioner, the gas-liquid bidirectional circulation can be realized, and the compressor can be supplemented with air in the refrigerating process of the air conditioner, so that the working efficiency of the air conditioner is improved, and the problems of complex pipeline switching and low system reliability of the traditional water chilling unit are solved.
It should be noted that the above-mentioned embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art can modify the above-mentioned structure so that the present invention can be applied to more specific application scenarios without departing from the principle of the present invention.
For example, in an alternative embodiment, the pressure regulating valve 151 may be configured to be opened and closed by a spring, or may be configured as an electrically controlled type pressure relief valve such as a solenoid valve or an electrically operated valve as long as the opening and closing of the pressure relief valve can be ensured for a fixed pressure value, without departing from the principle of the present invention, and therefore, the present invention is within the protection scope of the present invention.
For example, in another alternative embodiment, the refrigerant pump inlet is connected to the flash tank 3, or connected to the bottom of the evaporator 4, as long as the refrigerant can flow into each pipeline smoothly, without departing from the principle of the present invention, and therefore, the present invention is within the protection scope.
For example, in another alternative embodiment, the compressor 2 may be a scroll compressor, a rotor compressor, a screw compressor or a piston compressor, as long as the refrigerant flow manner satisfies the variable refrigerant flow and the customized refrigerant flow, which do not depart from the principle of the present invention and thus fall within the protection scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.
Claims (10)
1. A water chilling unit is characterized by comprising a compressor, a condenser, a first throttling device, a flash evaporation barrel, a second throttling device and an evaporator,
the compressor is connected with the condenser through a first refrigerant pipeline;
the condenser is connected with the flash evaporation barrel through a second refrigerant pipeline, and the first throttling device is arranged on the second refrigerant pipeline;
the flash barrel is connected with the evaporator through a third refrigerant pipeline, and the second throttling device is arranged on the third refrigerant pipeline;
the evaporator is connected with the compressor through a fourth refrigerant pipeline.
2. The water chilling unit according to claim 1, wherein a check valve is further disposed on the first refrigerant pipeline, the water chilling unit further comprises a fifth refrigerant pipeline, one end of the fifth refrigerant pipeline is disposed between the check valve and the condenser, the other end of the fifth refrigerant pipeline is communicated with a barrel of the evaporator, and a load balancing valve is further disposed on the fifth refrigerant pipeline.
3. The water chilling unit according to claim 1, further comprising a sixth refrigerant pipeline, wherein one end of the sixth refrigerant pipeline is connected to the upper portion of the flash drum, and the other end of the sixth refrigerant pipeline is connected to an air inlet of the compressor.
4. The water chilling unit according to claim 1, further comprising a seventh refrigerant pipeline, wherein one end of the seventh refrigerant pipeline is connected to the bottom of the flash evaporation barrel, the other end of the seventh refrigerant pipeline is connected to a motor cooling system of the compressor, and a refrigerant pump is further disposed on the seventh refrigerant pipeline.
5. The water chilling unit according to claim 4, further comprising an eighth refrigerant pipeline, wherein one end of the eighth refrigerant pipeline is connected to the seventh refrigerant pipeline between the refrigerant pump and the motor cooling system of the compressor, the other end of the eighth refrigerant pipeline is connected to the flash drum, and a pressure regulating valve is further disposed on the eighth refrigerant pipeline.
6. The chiller according to claim 1 wherein said compressor is a magnetic levitation compressor.
7. The chiller according to claim 1 wherein said condenser is an evaporative condenser.
8. The chiller according to claim 1 wherein said first throttling means and said second throttling means are electronic expansion valves.
9. The chiller according to claim 1, wherein level gauges are further provided on said flash tank and said evaporator.
10. The water chilling unit according to claim 4, wherein ball valves are further disposed between the condenser and the first throttling device, between the flash tank and the refrigerant pump, between the flash tank and the second throttling device, and between the second throttling device and the evaporator; butterfly valves are arranged between the condenser and the compressor and on the fourth refrigerant pipeline;
and a safety valve is also arranged between the condenser and the compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122178621.7U CN216924585U (en) | 2021-09-09 | 2021-09-09 | Water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122178621.7U CN216924585U (en) | 2021-09-09 | 2021-09-09 | Water chilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216924585U true CN216924585U (en) | 2022-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122178621.7U Active CN216924585U (en) | 2021-09-09 | 2021-09-09 | Water chilling unit |
Country Status (1)
| Country | Link |
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| CN (1) | CN216924585U (en) |
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2021
- 2021-09-09 CN CN202122178621.7U patent/CN216924585U/en active Active
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