CN217685941U - Double-working-condition water chilling unit - Google Patents
Double-working-condition water chilling unit Download PDFInfo
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- CN217685941U CN217685941U CN202221672163.0U CN202221672163U CN217685941U CN 217685941 U CN217685941 U CN 217685941U CN 202221672163 U CN202221672163 U CN 202221672163U CN 217685941 U CN217685941 U CN 217685941U
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Abstract
The utility model relates to a refrigeration machine technical field, the first compressor gas vent and the second compressor induction port of the duplex condition cooling water set of this application are connected by first exhaust pipe assembly, and the second compressor gas vent is connected through second exhaust pipe assembly and condenser, are connected with first evaporimeter and second evaporimeter respectively behind the condenser. And throttle valves are respectively arranged between the condenser and the first evaporator and between the condenser and the second evaporator. The back of the first evaporator is connected with a first compressor air suction port through a first air suction pipeline component, and the back of the second evaporator is connected with a second compressor air suction port through a second air suction pipeline component; a bypass pipeline component is arranged between the first suction pipeline component and the first exhaust pipeline component. The utility model provides a cooling water set can combine actual dehumidification and refrigerated demand and the duplex mode operation, provides the refrigerated water of different temperatures, and then improves whole air conditioning system's efficiency, reduces the working costs.
Description
Technical Field
The application relates to the technical field of refrigeration machinery, which is applied to the field of central air conditioners, in particular to a double-working-condition water chilling unit.
Background
In the water chilling unit, the outlet temperature of chilled water provided by the existing unit is 7 ℃ of standard temperature, and the chilled water with the standard temperature of 7 ℃ is introduced to the terminal equipment to cool or dehumidify each room. In the actual use process, different rooms are frequently encountered to have different dehumidification and cooling requirements. For a water chilling unit, the lower the outlet water temperature of the provided chilled water is, the lower the refrigeration energy efficiency of the unit is; conversely, the higher the temperature of the chilled water supplied to the terminals, the higher the refrigeration efficiency of the unit. If the tail end is uniformly provided with the chilled water with the standard temperature of 7 ℃, the economical efficiency is relatively low in the actual operation process, particularly under the working condition that only the temperature reduction requirement exists.
Disclosure of Invention
The water chilling unit has the technical problem that refrigeration energy efficiency is low in the prior art, so that the water chilling unit has at least three working modes, and can provide chilled water with standard temperature, high-temperature chilled water with slightly higher temperature and the chilled water with the standard temperature and the high-temperature chilled water simultaneously according to engineering practical conditions, so that the energy efficiency of the whole air conditioning system is improved, and the operation cost is reduced.
A double-working-condition water chilling unit comprises a compressor, a condenser, a throttle valve and an evaporator which are sequentially connected to form a circulation loop, wherein the compressor comprises a first compressor and a second compressor, and an exhaust port of the first compressor is connected with an air suction port of the second compressor through a first exhaust pipeline component; the exhaust port of the second compressor is connected with the condenser through a second exhaust pipeline component, and the condenser is respectively connected with the first evaporator and the second evaporator through a first liquid pipeline component and a second liquid pipeline component; the first liquid pipeline component comprises a connecting pipeline and a first throttling valve arranged in the connecting pipeline, and the second liquid pipeline component comprises a connecting pipeline and a second throttling valve arranged in the connecting pipeline; the first evaporator is connected with a first compressor air suction port through a first air suction pipeline component, and the second evaporator is connected with a second compressor air suction port through a second air suction pipeline component; and a bypass pipeline assembly is additionally arranged between the first air suction pipeline assembly and the first exhaust pipeline assembly, and comprises a connecting pipeline and a control valve arranged in the connecting pipeline.
Furthermore, the communication position of the bypass pipeline assembly and the first air suction pipeline assembly is a first connection point, the communication position of the bypass pipeline assembly and the first exhaust pipeline assembly is a second connection point, and the first exhaust pipeline assembly comprises a connection pipeline and a first check valve arranged in the connection pipeline and located between the first compressor exhaust port and the second connection point.
Further, the second exhaust duct assembly includes a connecting duct and a second check valve disposed in the connecting duct.
Further, an oil separator is arranged in the connecting pipeline of the second exhaust pipeline assembly.
Furthermore, the condenser is connected with the drying filter and then respectively connected with the first evaporator and the second evaporator.
Further, the first compressor is selected from a screw compressor or a magnetically levitated compressor.
Further, the first compressor is replaced by a fan or a fluorine pump.
Further, the second compressor 2 is selected from a screw compressor or a magnetic levitation compressor.
Further, the condenser is selected from a water-cooled condenser, an evaporative condenser or an air-cooled condenser; or the first evaporator and the second evaporator are selected from a flooded evaporator, a falling film evaporator.
Further, the first throttle valve and the second throttle valve are selected from an electronic expansion valve, an electric butterfly valve, an electric ball valve or a hole plate type throttling device.
The technical scheme has the following advantages or beneficial effects: the utility model provides a cooling water set combines the practical application condition to be the duplex condition operation, can provide the refrigerated water of two kinds of outlet water temperatures, under the great condition of room dehumidification demand, provides the refrigerated water of standard temperature for the end only, is used as dehumidification and cooling. The high-temperature refrigeration water supply device can simultaneously provide refrigeration water with standard temperature and high-temperature refrigeration water with higher temperature under the condition that the room dehumidification demand is not large, a coil connected with the high-temperature refrigeration water is placed in front and used as a precooling coil, and a coil connected with the refrigeration water with the standard temperature is placed in back and used for dehumidification and re-cooling. Under the condition that the room does not need dehumidification, the tail end is only connected with high-temperature chilled water to cool the room. The air conditioning system has the advantages that chilled water with different temperatures can be provided for each room according to actual requirements, the energy efficiency of the whole air conditioning system is improved, and the operation cost is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious to a person skilled in the art that other figures can also be obtained from the provided figures without inventive effort.
Fig. 1 shows a schematic structural diagram and a first operating mode of a dual-operating-condition water chiller according to an embodiment of the present invention.
Fig. 2 shows a schematic structural diagram of another dual-condition chiller and a second operating mode according to an embodiment of the present application.
Fig. 3 shows a schematic structural diagram of another dual-condition chiller and a third operating mode according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application are clearly and completely described below with reference to the drawings of the present application. It is obvious that the described embodiments are only a few embodiments of the present application, which are intended to explain the inventive concept. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second", etc. used in the description are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. The term "plurality" means two or more unless specifically limited otherwise.
Unless expressly stated or limited otherwise, the terms "connected," "connected," and the like as used in the description are to be construed broadly, and for example, as meaning a fixed connection, a removable connection, or an integral part; can be mechanical connection and electrical connection; may be directly connected, or indirectly connected through an intermediate; either as communication within the two elements or as an interactive relationship of the two elements. Specific meanings of the above terms in the examples can be understood by those of ordinary skill in the art according to specific situations.
Reference throughout this specification to "one particular embodiment" or "an example" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Referring to fig. 1, a specific embodiment of the present application provides a dual-working condition water chilling unit, which includes a first compressor 1 and a second compressor 2, and a discharge port of the first compressor 1 and a suction port of the second compressor 2 are connected by a first discharge pipeline assembly 9. The exhaust port of the second compressor 2 is connected with the condenser 3 through a second exhaust pipeline component 10, and the rear part of the condenser 3 is respectively connected with the first evaporator 4 and the second evaporator 5. The condenser 3 and the first evaporator 4 are communicated by a first liquid pipeline assembly 6, and the first liquid pipeline assembly 6 comprises a connecting pipeline and a first throttle valve 6a arranged in the connecting pipeline. The condenser 3 and the second evaporator 5 are communicated by a second liquid pipeline assembly 7, and the second liquid pipeline assembly 7 comprises a connecting pipeline and a second throttle valve 7a arranged in the connecting pipeline. The first evaporator 4 is connected with the first compressor 1 through a first air suction pipeline component 11, and the second evaporator 5 is connected with the second compressor 2 through a second air suction pipeline component 12. A bypass pipeline assembly 8 is additionally arranged between the first air suction pipeline assembly 11 and the first exhaust pipeline assembly 9, the bypass pipeline assembly 8 comprises a connecting pipeline and a control valve 8a arranged in the connecting pipeline, a first connecting point 82 is arranged at the communication position of the bypass pipeline assembly 8 and the first air suction pipeline assembly 11, and a second connecting point 83 is arranged at the communication position of the bypass pipeline assembly 8 and the first exhaust pipeline assembly 9.
Preferably, the first discharge line assembly 9 comprises a connecting line and a first check valve 9a disposed in the connecting line, the first check valve 9a being located between the discharge port of the first compressor 1 and the second connection point 83; the second exhaust line assembly 10 includes a connecting line and a second check valve 10a disposed in the connecting line.
Preferably, the dual-working-condition water chilling unit of the present application may further include some configurations, for example, an oil separator is disposed in the connection pipeline of the second exhaust pipeline assembly 10; the condenser 3 is connected to the dry filter and then to the first evaporator 4 and the second evaporator 5, respectively.
The first compressor 1 may be selected from compressors of different forms, and may also be a fan or a fluorine pump, the compressor form preferably being a screw compressor or a magnetic levitation compressor. The second compressor 2 may be selected from compressors of different forms, preferably screw compressors or magnetically levitated compressors. The condenser 3 may be a water-cooled condenser, an evaporative condenser, or an air-cooled condenser. The first evaporator 4 and the second evaporator 5 may be flooded evaporators, falling film evaporators, or other types of evaporators. The first throttle valve 6a and the second throttle valve 7a may be electronic expansion valves, or may also be electric butterfly valves or electric ball valves, or may also be orifice plates or other forms of throttling devices.
Referring to fig. 1, 2 and 3, another embodiment of the present application provides three operating modes of a dual-condition chiller. Working mode 1: the first evaporator 4 and the second evaporator 5 both provide chilled water at a standard temperature; the working mode 2 is as follows: the first evaporator 4 and the second evaporator 5 both provide high-temperature chilled water; working mode 3: the first evaporator 4 supplies chilled water of a standard temperature and the second evaporator 5 supplies chilled water of a high temperature.
Referring to fig. 1, the dual-condition water chilling unit operates according to the operating mode 1, the first evaporator 4 and the second evaporator 5 both provide chilled water at a standard temperature, the first compressor 1 is closed, the second compressor 2 is opened, the first throttle valve 6a, the second throttle valve 7a and the control valve 8a are all in an open state, wherein the first throttle valve 6a and the second throttle valve 7a automatically adjust the opening according to the outlet water temperature of the chilled water of the respective corresponding evaporator. At this time, the energy efficiency of the water chiller in this embodiment is comparable to that of a general water chiller that supplies chilled water at a standard temperature of 7 ℃.
Operation mode 1 refrigerant flow path: the low-temperature and low-pressure gas refrigerant from the first evaporator 4 passes through the first suction pipe assembly 11, the bypass pipe assembly 8 and the low-temperature and low-pressure gas refrigerant from the second evaporator 5 passing through the second suction pipe assembly 12 to be mixed, enters the second compressor 2, is compressed into high-temperature and high-pressure gas refrigerant, and then enters the condenser 3. The refrigerant is condensed into high-pressure liquid refrigerant in the condenser 3 and then divided into two paths, one path enters the first liquid pipeline assembly 6, is throttled by the first throttling valve 6a and then becomes low-temperature and low-pressure gas-liquid mixed refrigerant, and enters the shell layer of the first evaporator 4, wherein the liquid refrigerant absorbs the heat of the chilled water in the pipeline layer of the first evaporator 4 and is evaporated into gas refrigerant, meanwhile, the temperature of the chilled water in the pipeline layer is reduced, the outlet water temperature of the chilled water is controlled to be about 7 ℃ by controlling the opening degree of the first throttling valve 6a, the chilled water at 7 ℃ is provided for the tail end of an air conditioner, the evaporated gas refrigerant enters the first air suction pipeline assembly 11, at the moment, the first compressor 1 is in a closed state, the control valve 8a is in an open state, and the gas refrigerant coming out of the first air suction pipeline assembly 11 enters the bypass pipeline assembly 8. The other path of liquid refrigerant from the condenser enters a second liquid pipeline component 7, is throttled by a second throttle valve 7a and then becomes a low-temperature and low-pressure gas-liquid mixed refrigerant, and enters a shell layer of the second evaporator 5, wherein the liquid refrigerant absorbs the heat of the chilled water in the pipe layer of the second evaporator 5 and is evaporated into a gas refrigerant, meanwhile, the temperature of the chilled water in the pipe layer is reduced, the outlet water temperature of the chilled water is controlled to be about 7 ℃ by controlling the opening degree of the second throttle valve 7a, the chilled water at 7 ℃ is provided for the tail end of the air conditioner, the evaporated gas refrigerant enters a second suction pipeline component 12, is finally mixed with the gas refrigerant coming out of a bypass pipeline component 8, enters a second compressor 2 and is compressed into a high-temperature and high-pressure gas refrigerant again, and the cycle is repeated.
Referring to fig. 2, the dual-condition chiller operates according to the operating mode 2, the first evaporator 4 and the second evaporator 5 both provide high-temperature chilled water, the first compressor 1 is closed, the second compressor 2 is opened, and the first throttle valve 6a, the second throttle valve 7a and the control valve 8a are all in an open state, wherein the first throttle valve 6a and the second throttle valve 7a automatically adjust the opening according to the chilled water outlet temperature of the respective corresponding evaporator.
Referring to fig. 3, the dual-condition chiller operates according to the operating mode 3, the first evaporator 4 provides chilled water at a standard temperature, the second evaporator 5 provides high-temperature chilled water, the first compressor 1 is started, the second compressor 2 is started, the first throttle valve 6a and the second throttle valve 7a are both in an open state, the control valve 8a is closed, and the first throttle valve 6a and the second throttle valve 7a automatically adjust the opening according to the outlet water temperature of the chilled water corresponding to the respective evaporators.
While embodiments of the present application have been illustrated and described above, it should be understood that they have been presented by way of example only, and not limitation. Without departing from the spirit and scope of this application, there are also various changes and modifications that fall within the scope of the claimed application.
Claims (10)
1. The utility model provides a duplex condition cooling water set, is including connecting gradually compressor, condenser, choke valve and the evaporimeter that forms circulation circuit, its characterized in that: the compressor comprises a first compressor and a second compressor, and an exhaust port of the first compressor is connected with a suction port of the second compressor through a first exhaust pipeline component; the exhaust port of the second compressor is connected with the condenser through a second exhaust pipeline component, and the condenser is respectively connected with the first evaporator and the second evaporator through a first liquid pipeline component and a second liquid pipeline component; the first liquid pipeline component comprises a connecting pipeline and a first throttling valve arranged in the connecting pipeline, and the second liquid pipeline component comprises a connecting pipeline and a second throttling valve arranged in the connecting pipeline; the first evaporator is connected with a first compressor air suction port through a first air suction pipeline component, and the second evaporator is connected with a second compressor air suction port through a second air suction pipeline component; and a bypass pipeline assembly is additionally arranged between the first air suction pipeline assembly and the first exhaust pipeline assembly, and comprises a connecting pipeline and a control valve arranged in the connecting pipeline.
2. The dual-working-condition water chilling unit according to claim 1, wherein: the bypass pipeline assembly is communicated with the first air suction pipeline assembly to form a first connection point, the bypass pipeline assembly is communicated with the first exhaust pipeline assembly to form a second connection point, and the first exhaust pipeline assembly comprises a connection pipeline and a first check valve arranged in the connection pipeline and located between a first compressor exhaust port and the second connection point.
3. The dual-working-condition water chilling unit according to claim 1, wherein: the second exhaust pipeline assembly comprises a connecting pipeline and a second check valve arranged in the connecting pipeline.
4. The dual-operating-condition water chilling unit according to claim 1, wherein: an oil separator is arranged in the connecting pipeline of the second exhaust pipeline assembly.
5. The dual-operating-condition water chilling unit according to claim 1, wherein: the condenser is connected with the drying filter and then respectively connected with the first evaporator and the second evaporator.
6. The dual-working-condition water chilling unit according to claim 1, wherein: the first compressor is selected from a screw compressor or a magnetic levitation compressor.
7. The dual-operating-condition water chilling unit according to claim 1, wherein: the first compressor is replaced by a fan or a fluorine pump.
8. The dual-working-condition water chilling unit according to claim 1, wherein: the second compressor 2 is selected from a screw compressor or a magnetic levitation compressor.
9. The dual-working-condition water chilling unit according to claim 1, wherein: the condenser is selected from a water-cooled condenser, an evaporative condenser or an air-cooled condenser; or the first evaporator and the second evaporator are selected from a flooded evaporator, a falling film evaporator.
10. The dual-working-condition water chilling unit according to claim 1, wherein: the first throttle valve and the second throttle valve are selected from an electronic expansion valve, an electric butterfly valve, an electric ball valve or a hole plate type throttling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221672163.0U CN217685941U (en) | 2022-07-01 | 2022-07-01 | Double-working-condition water chilling unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221672163.0U CN217685941U (en) | 2022-07-01 | 2022-07-01 | Double-working-condition water chilling unit |
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| CN217685941U true CN217685941U (en) | 2022-10-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115143658A (en) * | 2022-07-01 | 2022-10-04 | 浙江国祥股份有限公司 | Double-working-condition water chilling unit and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115143658A (en) * | 2022-07-01 | 2022-10-04 | 浙江国祥股份有限公司 | Double-working-condition water chilling unit and control method thereof |
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