CN203489551U - Air-conditioning system - Google Patents
Air-conditioning system Download PDFInfo
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- CN203489551U CN203489551U CN201320551608.4U CN201320551608U CN203489551U CN 203489551 U CN203489551 U CN 203489551U CN 201320551608 U CN201320551608 U CN 201320551608U CN 203489551 U CN203489551 U CN 203489551U
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Abstract
The utility model provides an air-conditioning system. The air-conditioning system comprises a compressor, a condenser, a throttling device, an evaporator, a gas-liquid separator and a thermal expansion valve, wherein the compressor, the condenser, the throttling device, the evaporator and the gas-liquid separator are connected in sequence to form a circulation loop; a temperature wrap of the thermal expansion valve is arranged on a surface of a liquid supply pipeline between the throttling device and the condenser; the inlet of the thermal expansion valve is communicated with an exhaust pipe of the compressor; the outlet of the thermal expansion valve is communicated with the inlet of the gas-liquid separator, an air suction end of the compressor or the inlet end of the evaporator; when the difference between the pressure of the temperature wrap and the evaporation pressure is greater than a spring tightening force of the thermal expansion valve, the thermal expansion valve is opened. The air-conditioning system prevents damage from too low evaporation pressure and too high condensation pressure to parts of the system (the evaporator and the compressor), improves evaporation pressure and temperature, prevents the evaporator from frosting, lowers the condensing temperature, guarantees reliable operation of a machine set at a high temperature, and achieves low noise and continuous operation when the thermal expansion valve is opened.
Description
Technical field
The utility model relates to refrigerating field, particularly relates to a kind of hypotony that avoids evaporating, the too high air-conditioning system of condensing pressure.
Background technology
Common air-conditioning device is in the market when cryogenic refrigeration moves, because the low condensing pressure of environment temperature is low, after causing throttling, refrigerant temperature is very low, there is the even icing phenomenon of frosting in evaporimeter, often adopt following two kinds of modes to process evaporimeter frosting phenomenon, the one, after evaporimeter frosting, stop compressor, the shortcoming of this kind of mode is that compressor shutdown affects refrigeration; The 2nd, open bypass, unit need increase pressure sensor and gather pressure signal, when evaporating pressure is too low, when switch bypass pressure oscillation large, unfavorable to refrigeration system, open discontinuously, and noise is large.
When environment temperature is high, during system condensing excess Temperature, system exhaust pressure, compression ratio can surpass compressor setting, cause wasted work increase seriously can make compressor occur built-in protection or compressor damage.
Utility model content
The purpose of this utility model is to provide a kind of air-conditioning system, improves evaporating pressure, temperature, and device frosting avoids evaporating; Reduce condensation temperature, guarantee at high temperature reliability service of unit.For achieving the above object, the technical solution of the utility model is as follows:
An air-conditioning system, comprises compressor, condenser, throttling arrangement, evaporimeter, vapour liquid separator and heating power expansion valve;
Described compressor, condenser, throttling arrangement, evaporimeter and vapour liquid separator are in turn connected to form closed circuit;
The temperature-sensitive bag of described heating power expansion valve is arranged on the liquid feeding pipeline surface between described throttling arrangement and described condenser;
The entrance of described heating power expansion valve is communicated with the blast pipe of described compressor, and the outlet of described heating power expansion valve is communicated with the arrival end of described vapour liquid separator or is communicated with the suction end of described compressor or is communicated with the arrival end of described evaporimeter;
When the difference of described sense bulb pressure and evaporating pressure is greater than the tight power of spring of described heating power expansion valve, described heating power expansion valve is opened.
More preferably, described heating power expansion valve is outer balanced type heating power expansion valve;
The pressure-equalizing pipe of described heating power expansion valve is communicated with the arrival end of described vapour liquid separator or is communicated with the suction end of described compressor;
The outlet of described heating power expansion valve is communicated with the arrival end of described vapour liquid separator or is communicated with the suction end of described compressor or is communicated with the arrival end of described evaporimeter.
More preferably, the quiet degree of superheat of the thermal expansion of described heating power expansion valve is 35 ℃-50 ℃.
More preferably, described throttling arrangement is electric expansion valve or capillary.
The beneficial effects of the utility model are:
Air-conditioning system of the present utility model, the hypotony that avoids evaporating, the too high damage to system parts (evaporimeter and compressor) of condensing pressure; Improve evaporating pressure, temperature, device frosting avoids evaporating; Reduce condensation temperature, guarantee at high temperature reliability service of unit, when heating power expansion valve is opened, noise is little and continuous.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of air-conditioning system one embodiment of the present utility model;
Fig. 2 is the schematic diagram of another embodiment of air-conditioning system of the present utility model;
Wherein,
1 compressor; 2 condensers; 3 temperature-sensitive bags; 4 throttling arrangements; 5 evaporimeters; 6 vapour liquid separators; 7 heating power expansion valves; 8 pressure-equalizing pipes.
The specific embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, air-conditioning system of the present utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Referring to Fig. 1 and Fig. 2, air-conditioning system one embodiment of the present utility model comprises compressor 1, condenser 2, throttling arrangement 4, evaporimeter 5 and vapour liquid separator 6, compressor 1, condenser 2, throttling arrangement 4, evaporimeter 5 and vapour liquid separator 6 are in turn connected to form closed circuit, and throttling arrangement 4 is electric expansion valve or capillary.
Air-conditioning system also comprises heating power expansion valve 7, the temperature-sensitive bag 3 of heating power expansion valve 7 is arranged on the liquid feeding pipeline surface between throttling arrangement 4 and condenser 2, the entrance of heating power expansion valve 7 is communicated with the blast pipe of compressor 1, and the outlet of heating power expansion valve 7 is communicated with the arrival end of vapour liquid separator 6 or is communicated with the suction end of compressor 1 or the arrival end of connection evaporimeter 5.
When the difference of sense bulb pressure and evaporating pressure is greater than the tight power of spring of heating power expansion valve 7, heating power expansion valve 7 is opened.
More preferably, as a kind of embodiment, as shown in Figure 1, heating power expansion valve 7 is outer balanced type heating power expansion valve, the pressure-equalizing pipe 8 of heating power expansion valve 7 is communicated with the arrival end of vapour liquid separator 6 or is communicated with the suction end of compressor 1, and the outlet of heating power expansion valve 7 is communicated with the arrival end of vapour liquid separator 6 or is communicated with the suction end of compressor 1 or the arrival end of connection evaporimeter 5.In Fig. 1 and Fig. 2, the pressure-equalizing pipe 8 of heating power expansion valve 7 is all communicated with the arrival end of vapour liquid separator 6, the difference of Fig. 1 and Fig. 2 is the outlet connected mode of heating power expansion valve 7, wherein, in Fig. 1, the outlet of heating power expansion valve 7 is communicated with the arrival end of vapour liquid separator 6, and in Fig. 2, the outlet of heating power expansion valve 7 is communicated with the arrival end of evaporimeter 5.
Select outer balanced type heating power expansion valve, the inlet pipe of heating power expansion valve 7 is connected to the blast pipe of compressor 1, heating power expansion valve 7 go out pipe and pressure-equalizing pipe 8 is connected to low-pressure side (air entry of vapour liquid separator import or compressor), the outlet that temperature-sensitive bag 3 is pricked at condenser 2, when condensing pressure is too high or evaporating pressure is too low, heating power expansion valve 7 can be opened gradually, and high pressure refrigerant gas is let out in low pressure line.
The open degree of heating power expansion valve 7 is felt the impact of bulb pressure and two parameters of pressure-equalizing pipe 8 pressure of living in (evaporating pressure), when the tight power of sense bulb pressure-evaporating pressure > thermal expansion valve spring, thermal expansion can be opened, high pressure gas is known from experience and from the blast pipe of compressor 1, is flow to vapour liquid separator 6, and the temperature that temperature-sensitive bag detects is higher, evaporating pressure when lower heating power expansion valve 7 open degree larger.Wherein, heating power expansion valve temperature sensing bag pressure power is the upward pressure of thermal expansion valve film, refrigerant pressure corresponding to temperature that temperature-sensitive bag detects.
When environment temperature lower than 20 ℃, indoor temperature compared with little (the minimum wind shelves of air-conditioner of the indoor set air quantity of low (generally lower than 21 ℃), air-conditioner, or air channel is the longest) time, evaporating pressure can reduce, sense bulb pressure-evaporating pressure > heating power expansion valve initial tension of spring, thermal expansion can be opened, make evaporating pressure increase, final unit can be a stable state operation, evaporimeter can be because of the too low frosting of temperature, icing effect refrigeration, and pressure oscillation that heating power expansion valve can easily not cause as magnetic valve start-stop is large, noise is large.
When unit operation is during at worst hot case (environment temperature is greater than 48 ℃), the temperature at heating power expansion valve place can be lower 5 ℃-10 ℃ than the condensation temperature of system, condensation temperature is greater than certain value, and (compressor specifications have explanation, compressor operating maximum pressure or condensation temperature) time, when sense bulb pressure-evaporating pressure > heating power expansion valve initial tension of spring, thermal expansion can be opened, high pressure gas is known from experience to be flow to vapour liquid separator 6 from the blast pipe of compressor 1, system exhaust pressure (condensation temperature) declines, thereby guarantees that unit normally moves.
Heating power expansion valve plays throttling release effect in refrigeration system, and heating power expansion valve is mainly comprised of temperature-sensitive bag, capillary, diaphragm, valve seat, drive link (thimble), needle and governor motion etc.It has formed a confined space (gas tank) between temperature-sensitive bag, capillary and diaphragm, as induction mechanism.In temperature-sensitive bag, be filled with low-boiling point liquid (as R12 or R22 etc.) or fill appropriate active carbon and carbon dioxide, nitrogen etc.The wrapping of temperature-sensitive bag, on condensator outlet pipeline, in order to respond to condensator outlet temperature, carrys out the aperture of variable expansion valve according to overtemperature (condensator outlet temperature-evaporating temperature).Effect capillaceous is that the pressure in temperature-sensitive bag is delivered to diaphragm upper space.Diaphragm produces strain under upper pressure effect, and temperature-sensitive signal is passed to thimble with the open degree of control valve.Heating power expansion valve is divided into two kinds of inner equilibrium formula and outer balanced types by the condition of using.When the flow resistance hour of cold-producing medium in evaporimeter, should select inner equilibrium formula, when resistance is large, maybe, when adopting knockout dosing, should adopt outer balanced type.Outside in balanced type heating power expansion valve, pressure-equalizing pipe is communicated to diaphragm lower space, when the pressure in pressure-equalizing pipe (evaporating pressure) is more than or equal to diaphragm upper pressure with the tight power sum of thermal expansion valve spring, diaphragm does not produce strain, the valve closing of heating power expansion valve.When the tight power sum of the pressure in pressure-equalizing pipe and thermal expansion valve spring is less than diaphragm upper pressure, diaphragm produces strain, the valve opening of heating power expansion valve.
In each embodiment, use above thermal expansion occasion and general different; thermal expansion spring force (degree of superheat) need reset; the quiet degree of superheat of thermal expansion is set to 35 ℃-50 ℃; under peak load operating mode, regulate the unit thermal expansion number of turns to guarantee that pressure at expulsion can not surpass the pressure setting of compressor (when pressure at expulsion is during over compressor setting; heating power expansion valve can first be opened); when pressure surpasses compressor setting, heating power expansion valve is opened pressure is let out in low pressure, and protection pressure at expulsion is in setting.Wherein, the quiet degree of superheat of thermal expansion is that heating power expansion valve is controlled target, the i.e. temperature at temperature-sensitive bag place and the difference of evaporating temperature.
The air-conditioning system of above embodiment, the hypotony that avoids evaporating, the too high damage to system parts (evaporimeter and compressor) of condensing pressure; Improve evaporating pressure, temperature, device frosting avoids evaporating; Reduce condensation temperature, guarantee at high temperature reliability service of unit, when heating power expansion valve is opened, noise is little and continuous.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model the scope of the claims.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (4)
1. an air-conditioning system, comprises compressor, condenser, throttling arrangement, evaporimeter and vapour liquid separator, it is characterized in that:
Also comprise heating power expansion valve;
Described compressor, condenser, throttling arrangement, evaporimeter and vapour liquid separator are in turn connected to form closed circuit;
The temperature-sensitive bag of described heating power expansion valve is arranged on the liquid feeding pipeline surface between described throttling arrangement and described condenser;
The entrance of described heating power expansion valve is communicated with the blast pipe of described compressor, and the outlet of described heating power expansion valve is communicated with the arrival end of described vapour liquid separator or is communicated with the suction end of described compressor or is communicated with the arrival end of described evaporimeter;
When the difference of described sense bulb pressure and evaporating pressure is greater than the tight power of spring of described heating power expansion valve, described heating power expansion valve is opened.
2. air-conditioning system according to claim 1, is characterized in that:
Described heating power expansion valve is outer balanced type heating power expansion valve;
The pressure-equalizing pipe of described heating power expansion valve is communicated with the arrival end of described vapour liquid separator or is communicated with the suction end of described compressor;
The outlet of described heating power expansion valve is communicated with the arrival end of described vapour liquid separator or is communicated with the suction end of described compressor or is communicated with the arrival end of described evaporimeter.
3. air-conditioning system according to claim 1 and 2, is characterized in that:
The quiet degree of superheat of thermal expansion of described heating power expansion valve is 35 ℃-50 ℃.
4. air-conditioning system according to claim 3, is characterized in that:
Described throttling arrangement is electric expansion valve or capillary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551608.4U CN203489551U (en) | 2013-09-05 | 2013-09-05 | Air-conditioning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320551608.4U CN203489551U (en) | 2013-09-05 | 2013-09-05 | Air-conditioning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203489551U true CN203489551U (en) | 2014-03-19 |
Family
ID=50260377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320551608.4U Withdrawn - After Issue CN203489551U (en) | 2013-09-05 | 2013-09-05 | Air-conditioning system |
Country Status (1)
| Country | Link |
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| CN (1) | CN203489551U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422209A (en) * | 2013-09-05 | 2015-03-18 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN106440565A (en) * | 2016-11-24 | 2017-02-22 | 海信科龙电器股份有限公司 | Throttling assembly for air conditioner and air conditioner |
| CN109416208A (en) * | 2016-06-30 | 2019-03-01 | 大金工业株式会社 | Refrigerating plant |
| CN111023423A (en) * | 2019-12-27 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Control method and device for electronic expansion valve of air conditioner, medium and air conditioner |
-
2013
- 2013-09-05 CN CN201320551608.4U patent/CN203489551U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104422209A (en) * | 2013-09-05 | 2015-03-18 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN104422209B (en) * | 2013-09-05 | 2016-08-10 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN109416208A (en) * | 2016-06-30 | 2019-03-01 | 大金工业株式会社 | Refrigerating plant |
| CN109416208B (en) * | 2016-06-30 | 2021-02-09 | 大金工业株式会社 | Refrigerating device |
| CN106440565A (en) * | 2016-11-24 | 2017-02-22 | 海信科龙电器股份有限公司 | Throttling assembly for air conditioner and air conditioner |
| CN111023423A (en) * | 2019-12-27 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Control method and device for electronic expansion valve of air conditioner, medium and air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140319 Effective date of abandoning: 20160810 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20140319 Effective date of abandoning: 20160810 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |