CN210569393U - Water chilling unit - Google Patents
Water chilling unit Download PDFInfo
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- CN210569393U CN210569393U CN201920945477.5U CN201920945477U CN210569393U CN 210569393 U CN210569393 U CN 210569393U CN 201920945477 U CN201920945477 U CN 201920945477U CN 210569393 U CN210569393 U CN 210569393U
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Abstract
The utility model discloses a water chilling unit, which comprises a compressor, a water pump and a; a condenser having a condensation inlet and a condensation outlet, the condensation inlet being connected to the exhaust port of the high-stage compression chamber; a cooling water flow path; the evaporator is provided with an evaporation inlet and an evaporation outlet, and the evaporation outlet is connected with the air inlet of the primary compression cavity; a chilled water flow path; a gas-liquid separator having a gas-liquid inlet, a first outlet, a second outlet, and a third water flow path, wherein the cooling water flows through the gas-liquid separator. The utility model discloses a water chilling unit, through setting up third water flow path at vapour and liquid separator, wherein the cooling water that flows is arranged in cooling to the refrigerant in the vapour and liquid separator, increases the super-cooled rate before the refrigerant gets into the evaporimeter, improves unit mass refrigerant refrigerating output, reduces the flash gas of refrigerant before getting into the evaporimeter.
Description
Technical Field
The utility model belongs to heat pump system, specifically speaking relates to a cooling water set.
Background
Two-stage compression refrigeration cycles have found wide application in some refrigeration compressors. The existing heat pump system adopts a mode of middle air supplement, specifically, liquid from a condenser is subjected to gas-liquid separation, and the separated gas directly enters a high-pressure cavity of a compressor as middle air supplement; the separated liquid enters an evaporator to be evaporated, cold energy is absorbed, and low-pressure steam from the evaporator enters a low-pressure cavity of the compressor. Because the supercooling degree of the liquid refrigerant from the gas-liquid separator is very low, the front liquid refrigerant before entering the evaporator is vaporized, so that the unit refrigerating capacity is reduced, and the expansion valve cannot work normally.
Disclosure of Invention
The utility model discloses liquid refrigerant super-cooled rate to that gas-liquid separator came out among the prior art is very little, leads to the anterior liquid state refrigerant that divides before the entering evaporimeter to take place the vaporization, makes the technical problem that unit refrigerating output descends, the expansion valve can not normally work, has provided a cooling water set, can solve above-mentioned problem.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:
a chiller, comprising: the compressor comprises a primary compression cavity and a high-stage compression cavity, wherein the air inlet of the high-stage compression cavity is connected with the air outlet of the primary compression cavity; a condenser having a condensation inlet and a condensation outlet, the condensation inlet being connected to the exhaust port of the high-stage compression chamber; a cooling water flow path in which cooling water flows through the condenser; an evaporator having an evaporation inlet and an evaporation outlet, the evaporation outlet being connected to the air inlet of the primary compression chamber; a chilled water flow path in which chilled water flows through the evaporator; the gas-liquid separator is provided with a gas-liquid inlet, a first outlet and a second outlet, the gas-liquid inlet is connected with the condensation outlet, the first outlet is connected with the air supplementing port of the high-stage compression cavity, and the second outlet is connected with the evaporation inlet; a third water flow path in which the cooling water flows through the gas-liquid separator.
Furthermore, the third water flow path comprises a water taking end and a water discharging end, the water taking end is connected with a water source, a water pump is arranged in the third water flow path, and one of the water discharging end is connected with a water discharging pipe.
Further, the water source is a water well, a water tank or a tap water pipeline.
Further, when the water source is a water tank, the water tank is provided with a water intake, the water discharge end is connected with a water return tank through a water discharge pipe, and the water return tank is provided with a water discharge port.
Further, the third water flow path is provided with: a first temperature sensor for detecting the water level of the water inlet end of the third water flow path;
the gas-liquid separator is provided with a second temperature sensor used for detecting the temperature of the refrigerant in the gas-liquid separator, and the controller controls the water pump to be started according to the temperature values detected by the first temperature sensor and the second temperature sensor.
Furthermore, the other path of the drainage end is connected with the water inlet end of the cooling water path through a water replenishing pipe, and a first electromagnetic valve is arranged in the water replenishing pipe.
Further, a second electromagnetic valve is arranged in the water discharge pipe.
Furthermore, a first-stage throttling element is arranged between the condenser and the gas-liquid separator.
Further, a secondary throttling element is arranged between the gas-liquid separator and the evaporator.
Further, the compressor is a centrifugal compressor unit, a screw compressor unit or a scroll compressor unit.
Compared with the prior art, the utility model discloses an advantage is with positive effect: the utility model discloses a water chilling unit, through setting up third water flow path at vapour and liquid separator, wherein the cooling water that flows is arranged in cooling to the refrigerant in the vapour and liquid separator, increases the super-cooled rate before the refrigerant gets into the evaporimeter, improves unit mass refrigerant refrigerating output, reduces the flash gas of refrigerant before getting into the evaporimeter.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of an embodiment of a water chiller according to the present invention;
FIG. 2 is a p-h diagram of the chiller of FIG. 1;
fig. 3 is a partial view of the chiller of fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely 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" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In a first embodiment, the present invention provides a water chilling unit, as shown in fig. 1, including: the compressor 11 comprises a primary compression cavity 110 and a high-stage compression cavity 111, wherein an air inlet of the high-stage compression cavity 111 is connected with an air outlet of the primary compression cavity; the condenser 12 has a condensation inlet 121 and a condensation outlet 122, the condensation inlet 121 is connected with the exhaust port 112 of the high-stage compression chamber 111; cooling water flows through the cooling water flow path 13, wherein the cooling water is used for cooling a refrigerant in the condenser 12 when flowing through the condenser 12, the evaporator 14 is provided with an evaporation inlet and an evaporation outlet, and the evaporation outlet is connected with an air inlet of the primary compression cavity; the refrigerating water flow path, wherein the refrigerating water flows through the evaporator 14, the refrigerant in the evaporator 14 takes away the heat of the water in the refrigerating water flow path 15 to form low-temperature refrigerating water, and the refrigerating water circulates to cool the indoor; the gas-liquid separator 16 has a gas-liquid inlet 161, a first outlet 162, and a second outlet 163, the gas-liquid inlet 161 being connected to the condensation outlet 122, the first outlet 162 being connected to the gas supply port 113 of the high-stage compression chamber, the second outlet 163 being connected to the evaporation inlet; the cooling water in the third water flow path 17 flows through the gas-liquid separator 16, and the cooling water in the third water flow path 17 is used for cooling the refrigerant in the gas-liquid separator during the circulation process. The working principle of the water chilling unit is as follows: the low-pressure vapor generated in the evaporator 14 is first sucked into the primary compression chamber 110 by the compressor 11, the primary compression chamber 110 compresses the vapor to an intermediate pressure, and the vapor is merged with the gas separated from the gas-liquid separator 16 (commonly called economizer) and then enters the high-stage compression chamber 111, and is further compressed to a condensing pressurepk, then enters the condenser 12 to be condensed into liquid and is releasedThe cooling water flow path 13 is connected to the cooling water tank, circulates, and condenses and absorbs heat from the refrigerant in the condenser. The refrigerant from the condenser 12 enters a gas-liquid separator 16 to be separated into gas and liquid. The separated gas is taken as intermediate make-up gas and directly merged with the exhaust gas of the primary compression cavity 110 of the compressor 11 to enter a high-stage compression cavity 111; the liquid refrigerant that vapour and liquid separator 16 separated gets into and evaporates in the evaporimeter 14, prepares cold volume, and the liquid refrigerant temperature that vapour and liquid separator 16 came out is higher, if directly get into the evaporation heat absorption of evaporimeter 14, will lead to getting into flash distillation before the evaporimeter because the subcooling degree is not enough, reduces the refrigeration capacity, the utility model discloses a cooling water set, through setting up third water route 17, wherein the cooling water that flows is arranged in the refrigerant cooling to vapour and liquid separator 16, increases the subcooling degree before the refrigerant gets into evaporimeter 14, improves unit quality refrigerant refrigerating capacity, reduces the flash gas of refrigerant before getting into the evaporimeter, and the low pressure steam that evaporimeter 14 came out is inhaled by compressor 11's elementary compression chamber 110 after the superheated gas mixture that heat absorption passageway of heat exchanger converges.
As shown in fig. 2, which is a p-h diagram (pressure-enthalpy diagram) of the water chilling unit according to the present embodiment, 1 '-2' represents a compression process of the primary compression chamber 110, 2 '-10-3 represents a process in which the discharge gas 2' of the primary compression chamber 110 and the intermediate make-up gas 10 are mixed into a 3-point state, 3-4 represents a compression process in the high-stage compression chamber 111, 4-6 represents cooling in the condenser 12, condensation and supercooling, 6-7, which represents a throttling process through the primary throttling element 16, after which the refrigerant is subjected to gas-liquid separation, the refrigerant at point 7 is separated into saturated gas at point 10, the separated liquid is supercooled to point 8 ' through the heat exchanger 13, 8 ' -9 ' represents a throttling process through the secondary throttling element 17, and 9 ' -1 ' represents a superheating process after mixing with superheated gas in the heat release passage 132 after evaporation and refrigeration in the evaporator 15.
As a preferred embodiment, as shown in fig. 1 and 3, the third water flow path 17 includes a water intake end 171 and a water discharge end, the water intake end 171 is connected to a water source, a water pump 173 is disposed in the third water flow path 17, and one of the water discharge ends is connected to a water discharge pipe 174. After the cooling water in the third water flow path 17 absorbs heat in the gas-liquid separator 16, the temperature rises, and a drain pipe 174 can be provided to provide domestic hot water for users, so that on one hand, water resources are saved, on the other hand, energy consumption is saved, and hot water resources are fully utilized.
Wherein, the water source can be a well, a water tank or a tap water pipeline. In commercial use, a water well can be arranged for taking water, or a water tank for storing water is arranged, a water replenishing port is required to be arranged in the water tank, water is replenished when the water quantity is insufficient, or tap water in a tap water pipeline can be directly used.
Since the service time and the usage amount of the domestic water are not fixed, the water return tank 18 is preferably provided in the embodiment, the water discharge end is connected with the water return tank 18 through the water discharge pipe 174, the water return tank can store the inexhaustible warm water to ensure that a user can take the water at any time, and the water return tank 18 is provided with a water discharge port to discharge the redundant water in order to prevent overflow.
The third water flow path 17 is further provided with a first temperature sensor 175 for detecting the water temperature at the water inlet end of the third water flow path 17, the gas-liquid separator 16 is provided with a second temperature sensor 19 for detecting the temperature of the refrigerant in the gas-liquid separator, and the controller controls the water pump 173 to be turned on according to the temperature values detected by the first temperature sensor 175 and the second temperature sensor 19. The water pump 173 is controlled to be turned on only when the temperature of the cooling water in the third water flow path 17 is lower than the temperature of the water in the gas-liquid separator 16, and is not turned on otherwise. The controller is a master control module of the water chilling unit.
The third water flow path 17 is further provided with a third temperature sensor 178 for detecting the temperature of the water flowing out of the gas-liquid separator 16, the cooling water flow path 13 is provided with a fourth temperature sensor (not shown) for detecting the temperature of the cooling inlet water, the other of the water discharge ends is connected to the water inlet end of the cooling water flow path 13 through a water replenishing pipe 176, and the water replenishing pipe 176 is provided with a first electromagnetic valve 177. The third temperature sensor 178 and the fourth temperature sensor are respectively connected to the controller, and when the temperature of the water flowing out of the gas-liquid separator 16 is lower than the temperature of the cooling inlet water, the first electromagnetic valve 177 is controlled to open, so that the water flowing out of the gas-liquid separator in the third water flow path 17 enters the cooling water flow path 13 for condensing the refrigerant in the condenser 12. The cold energy of the water in the third water flow path 17 can be fully utilized, and the energy consumption is saved.
In order to reduce the temperature of the refrigerant by allowing all of the low-temperature water in the third water flow path 17 to enter the cooling water flow path 13 when the temperature of the water flowing out of the vapor-liquid separator 16 is lower than the temperature of the cooling inlet water, the drain pipe 174 is provided with a second solenoid valve 179, and when the first solenoid valve 177 is opened, the second solenoid valve 179 is closed to prevent the cooling water from being discharged through the drain pipe.
A first-stage throttling element 20 is arranged between the condenser 12 and the gas-liquid separator 16 and plays a role in throttling and depressurizing the refrigerant. The high pressure liquid refrigerant from the condenser 12 is throttled by the first stage throttling element 20, the pressure of the refrigerant is reduced to the intermediate pressure pm, the refrigerant is throttled by the first stage throttling element 20, the primary pressure reduction can be carried out on the refrigerant, the gas-liquid separation of the later stage is facilitated, and the refrigerant enters the later stage refrigerant, at the moment, the refrigerant comprises the liquid refrigerant and the gaseous refrigerant which is not fully liquefied in the condenser 12, and part of the liquid refrigerant is gasified when passing through the first stage throttling element 20, the mixed refrigerant enters the gas-liquid separator 16 to carry out the gas-liquid separation, and the separated gaseous refrigerant is still in the intermediate pressure state due to the pressure, so that the separated gaseous refrigerant directly enters the high-stage compression cavity through the gas supplementing port 113 to be compressed, and the part of the refrigerant is not compressed by the primary compression cavity 110 and directly enters the high-stage compression cavity 111 as the intermediate gas supplementing, thereby reducing, and the unit refrigerating capacity is improved, so that the efficiency of the unit is improved by about 7 percent.
As a preferred embodiment, the primary throttling element 20 may be implemented by an electronic expansion valve, and the adjustment of the opening degree of the primary throttling element 20 is implemented to adjust the temperature and pressure of the refrigerant entering the gas-liquid separator 16.
In order to adjust and control the refrigerant amount entering the evaporator 14 to adapt to the change of the refrigeration load and prevent the liquid impact phenomenon of the compressor, a secondary throttling element 21 is arranged between the gas-liquid separator 16 and the evaporator 14. The liquid refrigerant separated by the gas-liquid separator 16 passes through the secondary throttling element 21 to be throttled to the evaporation pressure p0, and then enters the evaporator 14 to be evaporated to prepare cold.
The cooling water in the third water flow path 17 can increase the supercooling degree of the refrigerant before entering the secondary throttling element 21, improve the refrigerating capacity of the refrigerant in unit mass and reduce the existence of flash evaporation gas before the secondary throttling element 21.
In order to facilitate the adjustment of the pressure of the refrigerant, the second-stage throttling element 21 may also be implemented by an electronic expansion valve in this embodiment, and the adjustment of the temperature and the pressure of the refrigerant entering the evaporator 14 is implemented by adjusting the opening degree of the second-stage throttling element 21.
The compressor 11 of the present embodiment has a two-stage compression function, and may be a centrifugal compressor unit, a screw compressor unit, or a scroll compressor unit.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.
Claims (10)
1. A chiller, comprising:
the compressor comprises a primary compression cavity and a high-stage compression cavity, wherein the air inlet of the high-stage compression cavity is connected with the air outlet of the primary compression cavity;
a condenser having a condensation inlet and a condensation outlet, the condensation inlet being connected to the exhaust port of the high-stage compression chamber;
a cooling water flow path in which cooling water flows through the condenser;
an evaporator having an evaporation inlet and an evaporation outlet, the evaporation outlet being connected to the air inlet of the primary compression chamber;
a chilled water flow path in which chilled water flows through the evaporator;
the gas-liquid separator is provided with a gas-liquid inlet, a first outlet and a second outlet, the gas-liquid inlet is connected with the condensation outlet, the first outlet is connected with the air supplementing port of the high-stage compression cavity, and the second outlet is connected with the evaporation inlet;
a third water flow path in which the cooling water flows through the gas-liquid separator.
2. The water chilling unit according to claim 1, wherein the third water flow path includes a water intake end and a water discharge end, the water intake end is connected to a water source, a water pump is disposed in the third water flow path, and one of the water discharge ends is connected to a water discharge pipe.
3. The water chilling unit according to claim 2, wherein the water source is a well, tank or tap water pipe.
4. The chiller according to claim 3 wherein when said water source is a water tank, said water tank has a water intake, said water discharge end is connected to a water return tank by a water discharge pipe, said water return tank having a water discharge port.
5. The water chilling unit according to claim 2, wherein the third water flow path further has disposed therein: a first temperature sensor for detecting the water level of the water inlet end of the third water flow path;
the gas-liquid separator is provided with a second temperature sensor used for detecting the temperature of the refrigerant in the gas-liquid separator, and the controller controls the water pump to be started according to the temperature values detected by the first temperature sensor and the second temperature sensor.
6. The water chilling unit according to claim 2, wherein the other of the water discharge ends is connected to the water inlet end of the cooling water flow path through a water replenishing pipe, and a first electromagnetic valve is disposed in the water replenishing pipe.
7. The chiller according to claim 2 wherein a second solenoid valve is disposed in said drain pipe.
8. The chiller according to any of claims 1-7, wherein a primary throttling element is disposed between the condenser and the gas-liquid separator.
9. The chiller according to claim 8, wherein a secondary throttling element is disposed between said gas-liquid separator and said evaporator.
10. The chiller according to any of claims 1-7, wherein the compressor is a centrifugal compressor unit, a screw compressor unit, or a scroll compressor unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920945477.5U CN210569393U (en) | 2019-06-22 | 2019-06-22 | Water chilling unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920945477.5U CN210569393U (en) | 2019-06-22 | 2019-06-22 | Water chilling unit |
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| CN210569393U true CN210569393U (en) | 2020-05-19 |
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| CN201920945477.5U Active CN210569393U (en) | 2019-06-22 | 2019-06-22 | Water chilling unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115388587A (en) * | 2022-08-26 | 2022-11-25 | 青岛海尔中央空调有限公司 | Method and device for controlling water chilling unit, water chilling unit and storage medium |
-
2019
- 2019-06-22 CN CN201920945477.5U patent/CN210569393U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115388587A (en) * | 2022-08-26 | 2022-11-25 | 青岛海尔中央空调有限公司 | Method and device for controlling water chilling unit, water chilling unit and storage medium |
| CN115388587B (en) * | 2022-08-26 | 2024-02-23 | 青岛海尔中央空调有限公司 | Method and device for controlling water chiller, water chiller and storage medium |
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