CN202066256U

CN202066256U - Air-cooled air conditioning system

Info

Publication number: CN202066256U
Application number: CN2010206671863U
Authority: CN
Inventors: 刘清泉; 陈良锐
Original assignee: Guangdong Midea Refrigeration Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2010-12-20
Filing date: 2010-12-20
Publication date: 2011-12-07
Anticipated expiration: 2020-12-20

Abstract

The utility model relates to an air-cooled air conditioning system which comprises a compressor, a condenser and a second evaporator. The exhaust outlet of the compressor is connected with the air inlet of the condenser; the exhaust outlet of the second evaporator is connected with the suction opening of the compressor; the air-cooled air conditioning system is characterized in that the air-cooled air conditioning system also comprises a first evaporator, a first throttle mechanism, a first electromagnetic valve, a second throttle mechanism and a second electromagnetic valve, wherein the first evaporator is connected with the second evaporator in series; the first throttle mechanism and the first electromagnetic valve which are connected in parallel are connected between the condenser and the first evaporator; and the second throttle mechanism and the second electromagnetic valve which are connected in parallel are connected between the first evaporator and the second evaporator. The air-cooled air conditioning system not only can achieve the optimal refrigeration and dehumidification effects, but also ensures that system components are less, the structure is simpler, and the cost is low.

Description

A kind of air-cooled air-conditioning system

Technical field

The utility model relates to a kind of air-cooled air-conditioning system, and particularly a kind of air-cooled air-conditioning system with double evaporators unit belongs to the improvement technology of air-cooled air-conditioning system.

Background technology

At present, commercially available air-cooled air-conditioning system all is equipped with single evaporator, its operation principle as shown in Figure 1, when refrigeration work, compressor 1 sucks low pressure, the low-temperature refrigerant steam of flash-pot 6 and keeps low pressure, low-temperature condition in the evaporimeter 6, creates the condition that evaporimeter 6 inner refrigerants seethe with excitement under low pressure, cryogenic conditions; The refrigerant vapour that sucks compressor 1 is through overcompression, and the vaporized refrigerant that produces high pressure-temperature also enters condenser 2, and heat is emitted in the medium cooling that is cooled under the constant situation of pressure, and temperature reduces, and permanent set becomes liquid refrigerant to discharge from condenser 2; The liquid refrigerant of high pressure is transformed into the liquid refrigerant under the low-temp low-pressure and enters evaporimeter 6 through the throttling step-down of throttle mechanism 3; Cold-producing medium is under the constant situation of pressure in evaporimeter 6, absorbs the heat of cooling medium and vaporizes, and the steam that is transformed into low-pressure low-temperature is discharged and siphoned away by compressor 1, so constantly circulation.

In recent years, there is producer to apply for some double evaporators patents, as publication number is the double evaporators air source heat pump system of (CN101487639), in traditional single evaporator systems, increased a heat exchanger, heat or during refrigeration work in system, utilize this heat exchanger of solenoid control in parallel, make this heat exchanger remain cooling condition with evaporimeter or condenser; Simultaneously, this patent is subjected to the limitation of its structure, principle, particularly for SPLIT AIR-CONDITIONING SYSTEM, it is indoor, need increase by one again on the basis of two present coolant connecting tubes between the off-premises station, the overall structure more complicated that causes system, not only bring inconvenience to installation and maintenance, cost also increases thereupon.

Summary of the invention

The purpose of this utility model is to consider the problems referred to above and a kind of refrigeration and better, simple in structure, the with low cost air-cooled air-conditioning system of effect on moisture extraction is provided.

The technical solution of the utility model is: a kind of air-cooled air-conditioning system, comprise compressor, the condenser and second evaporimeter, wherein the air inlet of the exhaust outlet of compressor and condenser links together, the exhaust outlet of second evaporimeter and the air entry of compressor link together, it is characterized in that also comprising first evaporimeter, first throttle mechanism, first magnetic valve, second throttle mechanism and second magnetic valve, wherein first evaporimeter and second evaporimeter are for being connected in series, between condenser and first evaporimeter, be connected with the first throttle mechanism in parallel and first magnetic valve, between first evaporimeter and second evaporimeter, be connected with second throttle mechanism in parallel and second magnetic valve.

The utility model adopts the structure with the newly-increased original evaporator series of evaporimeter and system, realized promptly that by two magnetic valves and two expansion valves double evaporators freezes simultaneously, or one evaporimeter heat, another evaporimeter refrigeration, reached optimum refrigeration and effect on moisture extraction, simultaneously, compared with prior art, still adopt two traditional coolant connecting tubes to connect, make system unit still less, structure is simpler, and is with low cost.

Description of drawings

Fig. 1 is existing single evaporator air-conditioning system schematic diagram;

Fig. 2 is a systematic schematic diagram of the present utility model;

Fig. 3 is that the utility model is realized the systematic schematic diagram that double evaporators freezes simultaneously;

Fig. 4 is that the utility model realizes that first evaporimeter heats, the systematic schematic diagram of second evaporimeter refrigeration.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As Fig. 2 institute, the air-cooled air-conditioning system of the utility model, comprise compressor 1, condenser 2, first throttle mechanism 3, first magnetic valve 4, first evaporimeter 5, second evaporimeter 6, second throttle mechanism 7 and second magnetic valve 8, wherein the air inlet of the exhaust outlet of compressor 1 and condenser 2 links together, the air entry of the exhaust outlet of second evaporimeter 6 and compressor 1 links together, first evaporimeter 5 and second evaporimeter 6 are for being connected in series, between condenser 2 and first evaporimeter 5, be connected with the first throttle mechanism 3 in parallel and first magnetic valve 4, between first evaporimeter 5 and second evaporimeter 6, be connected with second throttle mechanism 7 in parallel and second magnetic valve 8.

In the present embodiment, first evaporimeter 5 and two evaporimeters 6 place a same indoor set and a shared ducting system, the heat exchange area of first evaporimeter 5 is less than second evaporimeter 6 and be in before the position of second evaporimeter 6 in the air channel, and condenser 2 places in the off-premises station.

The air-cooled air-conditioning system of the utility model, can realize following two kinds of mode of operations: double evaporators freezes simultaneously, or first evaporimeter heats, second evaporimeter refrigeration, and its concrete operation principle is as follows:

One, double evaporators freezes simultaneously:

As shown in Figure 3, described first magnetic valve 4 cuts out, second magnetic valve 8 is opened, then

first evaporimeter

5 and 6 series connection of second evaporimeter, compressor 1 sucks low pressure, the low-temperature refrigerant steam that produces in first evaporimeter 5 and second evaporimeter 6, keep the low-pressure state in first evaporimeter 5 and second evaporimeter 6, created the condition that first evaporimeter 5 and second evaporimeter, 6 inner refrigerants seethe with excitement at low temperatures; The steam that sucks compressor 1 is through overcompression, and pressure and temperature all raises, and has created the condition that cold-producing medium can liquefy at normal temperatures; After the refrigerant vapour of high pressure-temperature enters condenser 2, the medium cooling is cooled under the constant situation of pressure, emit heat, temperature reduces, and permanent set becomes liquid to discharge from condenser 2, high pressure refrigerant liquid is through the 3 throttling step-downs of first throttle mechanism, cause the vaporization of part refrigerant liquid, absorb the latent heat of vaporization, make the also corresponding reduction of temperature of itself, become the moist steam under the low-temp low-pressure, enter first evaporimeter 5 and second evaporimeter 6 successively; Refrigerant liquid is under the constant situation of pressure in first evaporimeter 5 and second evaporimeter 6, absorbs the heat of the medium that is cooled and vaporizes, and the low-pressure low-temperature steam of formation is siphoned away by compressor 1 again, so constantly circulation.

In described first and second evaporimeter while process of refrigerastion, compared with prior art, because evaporimeter becomes two by one, increased heat exchange area greatly, made wind pushing temperature low, refrigeration is better.

Two, first evaporimeter heats, second evaporimeter refrigeration:

As shown in Figure 4, described first magnetic valve 4 is opened, second magnetic valve 8 cuts out, then first evaporimeter 5 and condenser 2 series connection, compressor 1 sucks low pressure, the low-temperature refrigerant steam that produces in second evaporimeter 6, keep the low-pressure state in second evaporimeter 6, created the condition that second evaporimeter, 6 inner refrigerants seethe with excitement at low temperatures; The steam that sucks compressor 1 is through overcompression, and pressure and temperature all raises, and has created the condition that cold-producing medium can liquefy at normal temperatures; After the refrigerant vapour of high pressure-temperature enters the condenser 2 and first evaporimeter 5 successively, the medium cooling is cooled under the constant situation of pressure, emit heat, temperature reduces, and permanent set becomes liquid to discharge from first evaporimeter 5, high pressure refrigerant liquid is through the 7 throttling step-downs of second throttle mechanism, cause the vaporization of part refrigerant liquid, absorb the latent heat of vaporization, make the also corresponding reduction of temperature of itself, become the moist steam under the low-temp low-pressure, enter second evaporimeter 6; Refrigerant liquid is under the constant situation of pressure in second evaporimeter 6, absorbs the heat of the medium that is cooled and vaporizes, and the low-pressure low-temperature steam of formation is siphoned away by compressor 1 again, so constantly circulation.

Described first evaporimeter heats, the second evaporimeter process of refrigerastion, second evaporimeter 6 of flowing through again after first evaporimeter 5 suitably heats up room air freezes, on the one hand the dehumidification rate during refrigerated dehumidification is better simultaneously than double evaporators, can prevent that on the other hand indoor temperature from reducing the sense of discomfort that causes indoor occupant too much.

Claims

1. air-cooled air-conditioning system, comprise compressor (1), condenser (2) and second evaporimeter (6), wherein the air inlet of the exhaust outlet of compressor (1) and condenser (2) links together, the air entry of the exhaust outlet of second evaporimeter (6) and compressor (1) links together, it is characterized in that also comprising first evaporimeter (5), first throttle mechanism (3), first magnetic valve (4), second throttle mechanism (7) and second magnetic valve (8), wherein first evaporimeter (5) and second evaporimeter (6) are for being connected in series, between condenser (2) and first evaporimeter (5), be connected with first throttle mechanism (3) in parallel and first magnetic valve (4), between first evaporimeter (5) and second evaporimeter (6), be connected with second throttle mechanism (7) in parallel and second magnetic valve (8).