CN2750229Y

CN2750229Y - Air-conditioning system self-adapting apparatus

Info

Publication number: CN2750229Y
Application number: CNU2004200626017U
Authority: CN
Inventors: 李苏; 李春光; 吴松
Original assignee: LOTUS AC (JIANGSU) CO Ltd
Current assignee: LOTUS AC (JIANGSU) CO Ltd
Priority date: 2004-07-12
Filing date: 2004-07-12
Publication date: 2006-01-04
Anticipated expiration: 2014-07-12

Abstract

The utility model discloses an air-conditioning system self-adapting device. In the utility model, a variable working condition bypass electromagnetic valve, a bypass capillary pipe, a bypass one-way valve and a pressure detecting switch are added from a high pressure exhaust pipe to the front part and the rear part of a throttling capillary pipe in the originally conventional air-conditioning refrigeration system. A bypass valve is controlled to be opened through detecting the pressure in the system; therefore, when the air-conditioning refrigeration system exceeds the working condition, the purpose of the stable operation of the air-conditioning refrigeration system can be achieved.

Description

The air-conditioning system self-reacting device

Affiliated technical field

The utility model relates to air-conditioning refrigeration system, especially a kind of super operating mode air-conditioning refrigeration system.

Background technology

Along with the raising day by day of air-conditioning popularization degree, increasing people will be in different regions, and different weathers are enjoyed the high-quality living environment that air-conditioning brings to them under the varying environment.This just requires the suitable region of air-conditioning wider, and the operating mode scope is bigger.People also improve constantly the requirement of product quality simultaneously, except the Energy Efficiency Ratio that requires unit, the stability of unit, the requirement of reliability are also being improved constantly, even requiring unit under superhigh temperature ultralow temperature, also can normally move, still do not having super operating mode refrigeration system at present and occur.Annotate: GB regulation air-conditioner outdoor unit standard operation operating mode is T _{Dry bulb}=35 ℃, T _{Wet bulb}=24 ℃; Indoor set standard operation operating mode is T _{Dry bulb}=27 ℃, T _{Wet bulb}=19 ℃; Refrigeration worst hot case off-premises station is T _{Dry bulb}=43 ℃, T _{Wet bulb}=25 ℃, indoor set is T _{Dry bulb}=32 ℃, T _{Wet bulb}=23 ℃; Heating ultralow temperature operating mode off-premises station is T _{Dry bulb}=-7 ℃, T _{Wet bulb}=-8 ℃, indoor set is T _{Dry bulb}=20 ℃; As not improved, high pressure is too high in the time of can causing the high temperature refrigeration when super operating mode is moved for conventional refrigeration system, excessive discharge temperature, and the compressor high temperature protection is shut down, and unit can't normally move, and also can cause the compressor operating life-span to reduce; Low pressure is low excessively during low-temperature heating, the oil return difficulty, thus cause low-voltage variation, or compressor burns out etc. because of oil starvation.

Summary of the invention

In order to overcome the shortcoming of present conventional air-conditioning refrigeration system, the utility model provides a kind of air-conditioning system variable working condition self-checking device, and this device is cheap, can make refrigeration system at super operating mode scope (T after installing additional _{Outdoor dry bulb}=20-53 ℃) interior stable operation.

The technical scheme that the utility model is dealt with problems is: this air-conditioning system self-reacting device, it comprises compressor, the condenser that is connected with the compressor high-pressure exhaust pipe by four-way change-over valve and pipeline and heat capillary, refrigerating capillary, the refrigeration check valve, evaporimeter, and the routine that vapour liquid separator is formed is freezed, heat the loop, heating capillary, the two ends of refrigerating capillary are connected in parallel to the bypass capillary that is in series and connects by the bypass check valve, to the high-pressure exhaust pipe between the cross valve, high-voltage switch gear is housed at compressor, from high-pressure exhaust pipe to the pipeline device between bypass capillary of compressor bypass solenoid valve is arranged, to the pipeline between the vapour liquid separator, low tension switch is housed at evaporimeter.

Good effect of the present invention is: this scheme can play the purpose of high pressure unloading, can play the effect that super operating mode operation is regulated again, no matter be system high pressure off-load bypass promptly, or low-temperature heating bypass, all can realize, and it is not very greatly that the Energy Efficiency Ratio after the bypass changes, delivery temperature also has certain decline, suction temperature descends during refrigeration, can reach the effect of hot-gas bypass when heating, and has both improved evaporating temperature, accelerated oil return speed again, so this scheme all can be taken into account cooling and warming, has guaranteed the operation of unit in ultralow superelevation operating mode scope, and can guarantee the operational factor point of compressor, unit durability is improved greatly than conventional unit, guaranteed the stable operation of unit under the super large operating mode, and unit eer decline is little, can effectively improve the unit operation life-span.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further described:

Accompanying drawing is a schematic diagram of the present utility model.

Among the figure: 1, compressor 2, condenser 3, evaporimeter 4, heat capillary 5, refrigerating capillary 6, heat check valve 7, cross valve 8, vapour liquid separator 9, bypass solenoid valve 10,11 bypass capillaries 12, bypass check valve 13, high-voltage switch gear 14, low tension switch.

With reference to accompanying drawing, the utility model is except the compressor (1) of conventional refrigeration system, condenser (2), evaporimeter (3), heat capillary (4), refrigerating capillary (5), heat check valve (6), cross valve (7), outside steam flow separator (8) critical piece, heating capillary (4), the two ends of refrigerating capillary (5) are by bypass check valve (12) bypass capillary in parallel (10), (11), to the high pressure gas pipeline between the cross valve, high-voltage switch gear is housed at compressor (1), from the high-pressure exhaust pipe of compressor (1) to bypass capillary (10), bypass solenoid valve (9) is housed on the pipeline (11), to the pipeline between the vapour liquid separator, low tension switch (14) is housed at evaporimeter (3).

Its operation principle is: when system is in super operating mode scope, high and low voltage switch in the system (13), (14) are detected its corresponding pressure automatically, bypass solenoid valve (9) was opened when pressure surpassed default value, closed when varying to another setting value, and system regulates, the purpose of balance thereby reach.Superhigh temperature operation when refrigeration, high pressure rises, when being raised to setting value, pressure switch (13) closure, bypass solenoid valve (9) is opened, a part of exhaust of compressor without condenser (2) through bypass capillary (10), bypass check valve (12), bypass to evaporimeter (3) mixes the cooling evaporation with refrigeration working medium after the throttling, get back to compressor (1), reduced suction temperature on the one hand, on the other hand because the effective capacity of compressor reduces high drops, drop to setting value, pressure switch (13) disconnects, bypass solenoid valve (9) coil losing electricity, solenoid closure, finish a make and break period, thus the self balancing purpose of the system that reaches.

Ultralow temperature operation when heating, low drops, when reducing to setting value, pressure switch (14) closure, bypass solenoid valve (9) is opened, a part of exhaust of compressor without evaporimeter (3) through bypass capillary (11), bypass check valve (12), bypass to evaporimeter (3) mixes with the lower temperature refrigeration working medium after the throttling, has improved throttle temperature when flowing through evaporimeter, has reduced the frosting degree, improved suction temperature on the one hand, owing to the high pressure bypass, low pressure rises, and is raised to setting value on the other hand, pressure is opened (14) and is disconnected, bypass solenoid valve (9) coil losing electricity, solenoid closure, thereby the self balancing purpose of the system that reaches.

During the less air-conditioner bypass of refrigerating capacity, can control its flow by bypass capillary.

Claims

1, a kind of air-conditioning system self-reacting device, it comprises compressor (1), the condenser (2) that is connected with the compressor high-pressure exhaust pipe by cross valve (7) and pipeline and heat capillary (4), refrigerating capillary (5), refrigeration check valve (6), evaporimeter (3), the routine refrigeration that vapour liquid separator (8) is formed, heat the loop, it is characterized in that heating capillary (4), the two ends of refrigerating capillary (5) are connected in parallel to the bypass capillary (10) that is in series and connects by bypass check valve (12), (11), to the high pressure gas pipeline between the four-way change-over valve (7), high-voltage switch gear (13) is housed at compressor (1), from the high-pressure exhaust pipe of compressor (1) to bypass capillary (10), bypass solenoid valve (9) is housed on the pipeline (11), to the pipeline between the vapour liquid separator (8), low tension switch (14) is housed at evaporimeter (3).