CN202947376U - High-efficient heat exchanger for low-temperature dichlorodifluoromethane unit - Google Patents
High-efficient heat exchanger for low-temperature dichlorodifluoromethane unit Download PDFInfo
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- CN202947376U CN202947376U CN 201220672774 CN201220672774U CN202947376U CN 202947376 U CN202947376 U CN 202947376U CN 201220672774 CN201220672774 CN 201220672774 CN 201220672774 U CN201220672774 U CN 201220672774U CN 202947376 U CN202947376 U CN 202947376U
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Abstract
The utility model discloses a high-efficient heat exchanger for a low-temperature dichlorodifluoromethane unit. The low-temperature dichlorodifluoromethane unit comprises a compressor. The high-efficient heat exchanger for the low-temperature dichlorodifluoromethane unit comprises a gas-liquid separator, an evaporator, an air pipe and a liquid pipe. The gas-liquid separator is located above the evaporator; at the same time, at one side of the gas-liquid separator, the upper end of the liquid pipe is communicated with the gas-liquid separator and the lower end of the liquid pipe is communicated with an inlet of the evaporator; and at the other side of the gas-liquid separator, the upper end of the air pipe is communicated with the gas-liquid separator and the lower end of the air pipe is communicated with an outlet of the evaporator. After the high-efficient heat exchanger is optimized, the potential-energy difference determined by the height difference between the gas-liquid separator and the evaporator is larger than the flow resistance of a refrigerating fluid evaporation loop. The gas-liquid separator comprises a liquid level meter and an oil return device; and one end of the oil return device extends a position below the liquid surface of the gas-liquid separator, and the other end of the oil return device is connected with the compressor. The high-efficient heat exchanger for the low-temperature dichlorodifluoromethane unit, disclosed by the utility model, has the advantages of small energy dissipation and high heat exchange efficiency, and having the capability of improving the refrigerating capacity.
Description
Technical field
The utility model relates to technical field of refrigerating devices, especially relates to a kind of freon low temperature unit efficient heat exchanger.
Background technology
The energy-conservation research of refrigerating plant mainly concentrates on 4 visual plants in system: compressor, two devices (evaporimeter, condenser) and throttle mechanism.Wherein, in two devices, the performance of evaporimeter improves particularly important.
At present, when refrigeration unit is moved under worst cold case, because the change along with temperature of the solubility of cold-producing medium and refrigeration oil changes, even be provided with oil eliminator on compressor exhaust pipe, refrigeration oil still can be carried under one's arms into evaporimeter in running, and the refrigeration oil viscosity increase that enters evaporimeter is not easy cooled dose and takes back compressor, thereby has reduced the heat exchange efficiency of refrigeration system.And, separate out along with the variation of cold-producing medium phase has refrigeration oil in evaporimeter, and the refrigeration oil of separating out easily forms one deck oil film in heat exchanger tube, and then increase the thermal resistance of heat exchanger tube.Simultaneously, needs for oil return, when the cold-producing medium that is in the gas-liquid mixed attitude flows in evaporator tube, must keep certain oil return speed, and to keep certain speed, have to again limit an appropriate flow area, this has increased the tube side pressure loss to a certain extent, has reduced heat transfer temperature difference.
And, cold-producing medium after the expansion valve throttling is in the gas-liquid two-phase admixture, enter the unfavorable phenomenon that is prone to the cold-producing medium maldistribution of first pass after evaporimeter, make the interior no liquid of some pipe or liquid seldom, thereby make these pipes lose the effect of evaporation and heat-exchange, affected the performance of heat-exchanging tube bundle whole efficiency.
Summary of the invention
The purpose of this invention is to provide a kind of freon low temperature unit efficient heat exchanger, it has the less characteristics of energy consumption.Further, it is high that it has a heat exchange efficiency, can improve refrigerating capacity, and the characteristics of environmental protection comparatively.
The technical solution adopted in the present invention is: freon low temperature unit efficient heat exchanger, this freon low temperature unit comprises compressor, this freon low temperature unit comprises gas-liquid separation device, evaporimeter, tracheae and liquid pipe with efficient heat exchanger, described gas-liquid separation device is positioned at the top of evaporimeter, simultaneously, in a side of this gas-liquid separation device, the upper end of this liquid pipe is communicated with this gas-liquid separation device, the lower end is communicated with the import of evaporimeter; At the opposite side of this gas-liquid separation device, the upper end of this tracheae is communicated with this gas-liquid separation device, the lower end is communicated with the outlet of this evaporimeter.
The poor flow resistance greater than the cold-producing medium evaporation circuit of the determined potential energy of difference in height between described gas-liquid separation device and this evaporimeter.
Described gas-liquid separation device includes liquid level gauge and oil return apparatus.
One end of described oil return apparatus puts under the liquid level of this gas-liquid separation device, and the other end is connected with compressor.
Described evaporimeter is the dry type shell and tube evaporator.
The advantage that compared to the prior art the present invention has is: 1, freon low temperature unit of the present invention with efficient heat exchanger by evaporimeter being arranged in the below of gas-liquid separation device, overcome the flow of refrigerant resistance in whole loop by the poor pressure that forms of the refrigerant density between gas-liquid separation device and evaporimeter, make cold-producing medium Natural Circulation between evaporimeter and gas-liquid separation device, thereby energy consumption is less.2, freon low temperature unit of the present invention is controlled the liquid supply rate that enters evaporimeter according to gas-liquid separation device with efficient heat exchanger, make the cold-producing medium in evaporimeter be in soaking state fully, avoided the problem of evaporimeter separatory inequality, increased the utilization rate of evaporator tube inwall heat exchange area, increase the evaporation boiling heat transfer coefficient, improved the COP of system.3, this gas-liquid separation device provides sufficient gas, liquid separation condition, even tracheae has a large amount of secondary liquid to enter, compressor still can suck dry saturated steam, has effectively controlled the compressor liquid hammer, thereby has improved operational efficiency and the compressor reliability of freon low temperature unit.4, an end of this oil return apparatus stretches under the interior liquid level of gas-liquid separation device, the refrigeration oil that on the cold-producing medium liquid level, concentration is higher is utilized the ejector action of highly pressurised liquid the refrigeration oil injection is returned compressor, can reduce the oil film thermal resistance on heat exchange pipe of evaporator, improve widely the utilization rate of heat transfer property and the evaporation tube of evaporimeter.5, be provided with liquid level gauge in this gas-liquid separation device, be used for making the liquid level constant of gas-liquid separation device, avoid compressor Wet Compression or evaporation efficiency to reduce.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples:
Fig. 1 is the front view of embodiments of the invention;
Fig. 2 is the left view of Fig. 1.
In figure: 1, gas-liquid separation device; 2, oil return apparatus; 3, liquid level gauge; 4, tracheae; 5, evaporimeter; 6, liquid pipe.
The specific embodiment
Embodiment, see illustrated in figures 1 and 2: freon low temperature unit efficient heat exchanger, this freon low temperature unit comprises compressor.This freon low temperature unit comprises gas-liquid separation device 1, evaporimeter 5, tracheae 4 and liquid pipe 6 with efficient heat exchanger.Concrete, described gas-liquid separation device 1 is positioned at the top of evaporimeter 5.Simultaneously, in a side of this gas-liquid separation device 1, the upper end of this liquid pipe 6 is communicated with this gas-liquid separation device 1, the lower end is communicated with the import of evaporimeter 5; At the opposite side of this gas-liquid separation device 1, the upper end of this tracheae 4 is communicated with this gas-liquid separation device 1, the lower end is communicated with the outlet of this evaporimeter 5.Like this, the cold-producing medium that flows into from condenser enters gas-liquid separation device 1, keep certain liquid column hydrostatic pressure in this gas-liquid separation device 1, then cold-producing medium enters the heat of the interior absorption refrigerating medium of evaporimeter 5 and constantly evaporates gasification through liquid pipe 6 under Action of Gravity Field, causes the cold-producing medium of these evaporimeter 5 import and exports to produce density contrast.This density contrast produces a pressure reduction, turn back to and carry out gas-liquid separation in gas-liquid separation device 1 thereby promote cold-producing medium, and the refrigerant gas after separating enters compressor compresses, the separated circulation again of getting off of liquid.
Optimize:
The poor flow resistance greater than the cold-producing medium evaporation circuit of the determined potential energy of difference in height between this gas-liquid separation device 1 and this evaporimeter 5.Like this, guaranteed the mobile smooth and easy of cold-producing medium.
For guaranteeing the constant of gas-liquid separation device 1 liquid level, this gas-liquid separation device 1 includes liquid level gauge 3 and oil return apparatus 2.Like this, operator or PLC can adjust liquid level according to the variation of load, control the refrigerant amount that enters evaporimeter 5.
One end of this oil return apparatus 2 puts under the liquid level of this gas-liquid separation device 1, and the other end is connected with compressor.Like this, utilize the ejector action of highly pressurised liquid that the refrigeration oil injection is returned compressor, solve the oil return problem of low temperature machine set compressor.
Under worst cold case, the intraductal heat transfer coefficient of refrigerating medium is lower than the outer heat transfer coefficient of pipe.For strengthening heat-transfer effect, refrigerating medium should be arranged on pipe outer mobile, cold-producing medium flows in pipe, therefore the preferential dry type shell and tube evaporator that adopts of this evaporimeter 5.
The above is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present invention.
Claims (5)
1. freon low temperature unit efficient heat exchanger, this freon low temperature unit comprises compressor, this freon low temperature unit comprises gas-liquid separation device (1), evaporimeter (5), tracheae (4) and liquid pipe (6) with efficient heat exchanger, it is characterized in that: described gas-liquid separation device (1) is positioned at the top of evaporimeter (5), simultaneously, in a side of this gas-liquid separation device (1), the upper end of this liquid pipe (6) is communicated with this gas-liquid separation device (1), the lower end is communicated with the import of evaporimeter (5); Opposite side in this gas-liquid separation device (1), the upper end of this tracheae (4) is communicated with this gas-liquid separation device (1), the lower end is communicated with the outlet of this evaporimeter (5).
2. freon low temperature unit efficient heat exchanger according to claim 1, is characterized in that: the poor flow resistance greater than the cold-producing medium evaporation circuit of the determined potential energy of difference in height between described gas-liquid separation device (1) and this evaporimeter (5).
3. freon low temperature unit efficient heat exchanger according to claim 1, it is characterized in that: described gas-liquid separation device (1) includes liquid level gauge (3) and oil return apparatus (2).
4. freon low temperature unit efficient heat exchanger according to claim 1, it is characterized in that: an end of described oil return apparatus (2) puts under the liquid level of this gas-liquid separation device (1), and the other end is connected with compressor.
5. the described freon low temperature of any one unit efficient heat exchanger according to claim 1 to 4, it is characterized in that: described evaporimeter (5) is the dry type shell and tube evaporator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220672774 CN202947376U (en) | 2012-12-07 | 2012-12-07 | High-efficient heat exchanger for low-temperature dichlorodifluoromethane unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220672774 CN202947376U (en) | 2012-12-07 | 2012-12-07 | High-efficient heat exchanger for low-temperature dichlorodifluoromethane unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202947376U true CN202947376U (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220672774 Withdrawn - After Issue CN202947376U (en) | 2012-12-07 | 2012-12-07 | High-efficient heat exchanger for low-temperature dichlorodifluoromethane unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202947376U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851833A (en) * | 2012-12-07 | 2014-06-11 | 昆山台佳机电有限公司 | High-efficiency heat exchanger for freon low-temperature unit |
| CN104315763A (en) * | 2014-09-26 | 2015-01-28 | 烟台冰轮股份有限公司 | Liquid recoverer device for direct-expansion full-liquid cooling blower |
-
2012
- 2012-12-07 CN CN 201220672774 patent/CN202947376U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851833A (en) * | 2012-12-07 | 2014-06-11 | 昆山台佳机电有限公司 | High-efficiency heat exchanger for freon low-temperature unit |
| CN104315763A (en) * | 2014-09-26 | 2015-01-28 | 烟台冰轮股份有限公司 | Liquid recoverer device for direct-expansion full-liquid cooling blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130522 Effective date of abandoning: 20160413 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |