CN216347136U - Fixed-frequency water chiller - Google Patents
Fixed-frequency water chiller Download PDFInfo
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- CN216347136U CN216347136U CN202120393487.XU CN202120393487U CN216347136U CN 216347136 U CN216347136 U CN 216347136U CN 202120393487 U CN202120393487 U CN 202120393487U CN 216347136 U CN216347136 U CN 216347136U
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Abstract
The utility model discloses a fixed-frequency water cooler, which comprises a water tank, an evaporator, a compressor, an expansion valve and an electromagnetic valve, wherein the expansion valve is used for reducing pressure and temperature through the expansion valve, and then the expansion valve enters the evaporator to absorb heat to form high-temperature gas, so that the water in the evaporator is cooled; when the water temperature of the cooling water is higher than the preset cooling water temperature, closing the electromagnetic valve, enabling the gaseous condensing agent to sequentially enter the compressor and the expansion valve to form low-pressure low-temperature liquid, and then returning the low-pressure low-temperature liquid to the evaporator for cooling; therefore, the compressor is not stopped, the response speed of the water cooler is improved, and the refrigeration effect of the water cooler can be improved at low production cost.
Description
Technical Field
The utility model relates to the technical field of water coolers, in particular to a fixed-frequency water cooler.
Background
The working systems of an injection molding machine, a die casting machine and a high-speed forming machine comprise a hydraulic system, a servo system and the like, cooling oil is pumped into the hydraulic system from an oil pool in the existing equipment to cool the hydraulic system, after cooling is completed, the cooling oil enters a water cooling machine to carry out heat exchange cooling, the cooling oil after cooling is completed returns to the oil pool again, and the hydraulic system is pumped into the oil pool again to be cooled, and circulation is formed.
The existing water chiller uses a compressor and a condensing agent, when the water temperature of cooling water is reduced to a preset temperature, the compressor stops working to stop heat exchange, after the heat exchange is stopped, the water temperature of the cooling water starts to rise gradually, and when the water temperature is higher than the preset temperature, the compressor starts working to exchange heat; in order to avoid damage to the compressor after frequent start and stop, the compressor is provided with start and stop time, and meanwhile, due to continuous supply of hot water, the temperature rise speed of cooling water is high, so that when the compressor is restarted after the start and stop time, the temperature of the cooling water is far higher than the preset temperature, and the cooling effect of the water cooler is poor.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving at least one of the problems of the prior art. The utility model provides a fixed-frequency water cooler which comprises a water tank, an evaporator, at least two compressors, an expansion valve and at least two electromagnetic valves, wherein a cold water inlet of the water tank is communicated with a cold water outlet of the evaporator, a suction inlet of the compressors is communicated with a condensing agent outlet of the evaporator, an inlet of the expansion valve is communicated with a discharge outlet of the compressors, an outlet of the expansion valve is communicated with the condensing agent inlet of the evaporator, inlets of the electromagnetic valves are communicated with a pipeline between the suction inlet of the compressors and the condensing agent outlet of the evaporator through pipelines, and an outlet of the electromagnetic valve is communicated with a pipeline between the discharge outlet of the compressors and the condensing agent inlet of the evaporator through pipelines.
According to some embodiments of the utility model, further comprising a heat exchanger, a refrigerant inlet of the heat exchanger being in communication with a discharge of the compressor via a conduit; the inlet of the expansion valve is communicated with the condensing agent outlet of the heat exchanger through a pipeline, and the outlet of the expansion valve is communicated with the condensing agent inlet of the evaporator.
According to some embodiments of the utility model, a subcooler is arranged between the expansion valve and the heat exchanger, a water inlet of the subcooler is communicated with the water tank, and a water outlet of the subcooler is communicated with a hot water inlet of the evaporator; and a condensing agent inlet of the subcooler is communicated with a condensing agent outlet of the heat exchanger, and a condensing agent outlet of the subcooler is communicated with an inlet of the expansion valve.
According to some embodiments of the utility model, a filter is disposed between the expansion valve and the subcooler.
According to some embodiments of the utility model, at least two of the solenoid valves are used.
According to some embodiments of the utility model, the water outlet of the water tank is connected to a water pump through a pipeline.
The fixed-frequency water chiller according to the embodiment of the utility model at least has the following beneficial effects:
the condensing agent forms high-pressure liquid in the compressor, the high-pressure liquid is decompressed and cooled through the expansion valve, then the high-temperature liquid enters the evaporator to absorb heat to form high-temperature gas, so that water in the evaporator is cooled, when the temperature of cooling water is lower than the preset cooling water temperature, the electromagnetic valve is opened, the gaseous condensing agent does not enter the compressor and enters the evaporator again, the evaporator stops cooling, and the compressor keeps idling; when the water temperature of the cooling water is higher than the preset cooling water temperature, closing the electromagnetic valve, enabling the gaseous condensing agent to sequentially enter the compressor and the expansion valve to form low-pressure low-temperature liquid, and then returning the low-pressure low-temperature liquid to the evaporator for cooling; therefore, the compressor is not stopped, the response speed of the water cooler is improved, and the refrigeration effect of the water cooler can be improved at low production cost.
Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a partial schematic view of the first embodiment of the present invention;
FIG. 3 is a partial schematic view of the second embodiment of the present invention;
FIG. 4 is a system diagram according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
Referring to fig. 1 to 3, a fixed-frequency water chiller includes a water tank 100, an evaporator 200, a compressor 300, an expansion valve 400, and solenoid valves 500, wherein a cold water inlet of the water tank 100 is communicated with a cold water outlet of the evaporator 200, a suction port of the compressor 300 is communicated with a refrigerant outlet of the evaporator 200, an inlet of the expansion valve 400 is communicated with a discharge port of the compressor 300, an outlet of the expansion valve 400 is communicated with a refrigerant inlet of the evaporator 200, at least two solenoid valves 500 are used, an inlet of the solenoid valve 500 is communicated with a pipeline between a suction port of the compressor 300 and the refrigerant outlet of the evaporator 200 through a pipeline, and an outlet of the solenoid valve 500 is communicated with a pipeline between the discharge port of the compressor 300 and the refrigerant inlet of the evaporator 200 through a pipeline.
Referring to fig. 4, the condensing agent forms a high-pressure liquid state in the compressor 300, is depressurized and cooled by the expansion valve 400, and then enters the evaporator 200 to absorb heat to form high-temperature gas, so as to cool the water in the evaporator 200, and the cooling water after cooling and cooling is continuously supplemented to cause the cooling water to be heated up immediately after being cooled to a preset cooling water temperature, so that the electromagnetic valve 500 is opened again after the water temperature of the cooling water is lower than a certain preset temperature, for example, the preset water temperature of the cooling water is 15 ℃, and when the water temperature of the cooling water is reduced to 14.5 ℃, the electromagnetic valve 500 is triggered to be opened, so that the gaseous condensing agent does not enter the compressor 300, but enters the evaporator 200 again, the evaporator 200 stops cooling, and the compressor 300 keeps idling; when the temperature of the cooling water is higher than the preset cooling water temperature, the electromagnetic valve 500 is closed, so that the gaseous refrigerant sequentially enters the compressor 300 and the expansion valve 400 to form low-pressure low-temperature liquid, and then returns to the evaporator 200 for cooling; thereby realizing that the compressor 300 does not stop, improving the response speed of the water chiller, and improving the refrigeration effect of the water chiller at low production cost.
In this embodiment, the number of the solenoid valves 500 is at least two, and the refrigerant is controlled in a stepwise manner by gradually opening or closing the two control solenoid valves 500, so as to improve the stability of the water chiller.
The heat exchanger 600 is also included, and a refrigerant inlet of the heat exchanger 600 is communicated with a discharge port of the compressor 300 through a pipeline; an inlet of the expansion valve 400 is communicated with a refrigerant outlet of the heat exchanger 600 through a pipe, and an outlet of the expansion valve 400 is communicated with a refrigerant inlet of the evaporator 200.
When the high-pressure and high-temperature liquid condensing agent is cooled and depressurized through the expansion valve 400, a flash phenomenon occurs, so that the condensing agent forms a gas-liquid mixed state, and the cooling effect is influenced, therefore, a subcooler 700 is arranged between the expansion valve 400 and the heat exchanger 600, the high-pressure and high-temperature liquid condensing agent is cooled in advance through the subcooler 700, the content of a gaseous condensing agent after the liquid condensing agent passes through the expansion valve 400 is reduced, and the cooling effect is improved; wherein the water inlet of the subcooler 700 is communicated with the water tank 100, and the water outlet of the subcooler 700 is communicated with the hot water inlet of the evaporator 200; a condensing agent inlet of the subcooler 700 is communicated with a condensing agent outlet of the heat exchanger 600, and a condensing agent outlet of the subcooler 700 is communicated with an inlet of the expansion valve 400.
A filter 800 is arranged between the expansion valve 400 and the subcooler 700; the water outlet of the water tank 100 is connected with a water pump 900 through a pipeline, and the cold water in the water tank is pumped to the cooling system through the water pump.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (6)
1. A fixed-frequency water chiller comprises a water tank (100), an evaporator (200), a compressor (300) and an expansion valve (400), a cold water inlet of the water tank (100) is communicated with a cold water outlet of the evaporator (200), the suction inlet of the compressor (300) is communicated with the refrigerant outlet of the evaporator (200), an inlet of the expansion valve (400) communicates with a discharge port of the compressor (300), an outlet of the expansion valve (400) is communicated with a refrigerant inlet of the evaporator (200), characterized in that the evaporator also comprises an electromagnetic valve (500), the electromagnetic valve (500) is used for communicating and blocking a pipeline between a suction inlet of the compressor (300) and a condensing agent outlet of the evaporator (200), the outlet of the electromagnetic valve (500) is communicated with a pipeline between the discharge port of the compressor (300) and the condensing agent inlet of the evaporator (200) through a pipeline.
2. The fixed-frequency water chiller according to claim 1, further comprising a heat exchanger (600), wherein a refrigerant inlet of the heat exchanger (600) is communicated with a discharge port of the compressor (300) through a pipeline; an inlet of the expansion valve (400) is communicated with a condensing agent outlet of the heat exchanger (600) through a pipeline, and an outlet of the expansion valve (400) is communicated with a condensing agent inlet of the evaporator (200).
3. The fixed-frequency water chiller according to claim 2, wherein a subcooler (700) is arranged between the expansion valve (400) and the heat exchanger (600), a water inlet of the subcooler (700) is communicated with the water tank (100), and a water outlet of the subcooler (700) is communicated with a hot water inlet of the evaporator (200); and a condensing agent inlet of the subcooler (700) is communicated with a condensing agent outlet of the heat exchanger (600), and a condensing agent outlet of the subcooler (700) is communicated with an inlet of the expansion valve (400).
4. A fixed frequency water chiller as claimed in claim 3 wherein a filter (800) is provided between the expansion valve (400) and the subcooler (700).
5. The fixed-frequency water chiller according to claim 1 wherein at least two solenoid valves (500) are used.
6. The fixed-frequency water chiller according to claim 1, wherein a water outlet of the water tank (100) is connected with a water pump (900) through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120393487.XU CN216347136U (en) | 2021-02-22 | 2021-02-22 | Fixed-frequency water chiller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120393487.XU CN216347136U (en) | 2021-02-22 | 2021-02-22 | Fixed-frequency water chiller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216347136U true CN216347136U (en) | 2022-04-19 |
Family
ID=81128110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120393487.XU Active CN216347136U (en) | 2021-02-22 | 2021-02-22 | Fixed-frequency water chiller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216347136U (en) |
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2021
- 2021-02-22 CN CN202120393487.XU patent/CN216347136U/en active Active
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