CN201583040U

CN201583040U - Refrigerating unit using high-efficiency oil-return flooded evaporator

Info

Publication number: CN201583040U
Application number: CN2009202717530U
Authority: CN
Inventors: 孔维利
Original assignee: TONGFANG ARTIFICIAL ENVIRONMENT CO Ltd
Current assignee: TONGFANG ARTIFICIAL ENVIRONMENT CO Ltd; Tsinghua Tongfang Artificial Environment Co Ltd
Priority date: 2009-11-19
Filing date: 2009-11-19
Publication date: 2010-09-15
Anticipated expiration: 2019-11-19

Abstract

The utility model provides a refrigerating unit using a high-efficiency oil-return flooded evaporator and relates to the technical field of air-conditioner refrigeration. The refrigerating unit comprises a refrigerating unit loop formed by connecting a compressor, a condenser, an expansion valve and an evaporator. An electromagnetic valve and an ejector are connected between an exhaust port and an air suction port of the compressor in parallel; and an oil-return ejection port of the ejector is connected with an oil-return port of the evaporator. The refrigerating unit has the structural characteristics that the oil-return port of the evaporator is connected to a high liquid level position and a low liquid level position of the liquid level of a refrigerant in a cavity of the evaporator respectively by an upper cavity channel and a lower cavity channel. Vertical guide rails are arranged outside the outlet of the upper cavity channel and the outlet of the lower cavity channel; the guide rails are provided with baffle plates that are slidingly connected with the guide rails and are provided with long oval holes; and the top ends of the baffle plates are connected with floating balls. Compared with the prior art, the refrigerating unit can realize the high-efficiency and stable oil return under different conditions and can keep the higher refrigerating efficiency.

Description

Use the refrigeration unit of efficient oil return flooded evaporator

Technical field

The utility model relates to the air conditioner refrigerating technical field, particularly uses the refrigeration unit of efficient oil return flooded evaporator.

Background technology

The flooded evaporator refrigeration unit is subjected to user's favor deeply owing to advantages such as cleaning are convenient in its coefficient of performance of refrigerating height, the low water route that reaches of operating cost.But, cause the not market acquisition extensive use at home of this series products because there are technological difficulties in this product aspect the oil return control.

In the prior art, generally adopt the direct injection of oily liq after utilization " injector " concentrates the part of evaporimeter " oil content high liquid " or with other method to return compressor (because cold-producing medium and the decision of refrigerator oil character at the oil return measure of flooded evaporator, during the evaporimeter operate as normal, higher " the fluid mixing material " of oil content swims in liquid level top in the evaporimeter).The advantage of this method is that system can both stablize oil return under various operating conditions.But be generally high temperature, the gases at high pressure that compressor is discharged owing to be used for the power source of " injector ", in injection low pressure, when the low temperature oily liq enters compressor, for making unit when the operation of sub-load or some special operation conditions, the device spill port that avoids evaporating produces " suction phenomenon ", and " spill port " position is all lower in the evaporimeter.Like this, " by injection " returns " oily liq " oil content instability of compressor in the evaporimeter, has lower " fluid mixing material " quilt " injection returns " compressor of oil content, and the reduction of refrigeration unit operational efficiency, coefficient of refrigerating performance are descended.

Summary of the invention

In order to overcome the deficiency that above-mentioned prior art exists, the purpose of this utility model provides a kind of refrigeration unit of using efficient oil return flooded evaporator.It can realize the oil return of efficient stable under different operating modes, and keeps the higher refrigerating efficiency of unit.

In order to reach the foregoing invention purpose, the technical solution of the utility model realizes as follows:

Use the refrigeration unit of efficient oil return flooded evaporator, it comprises by compressor, condenser, expansion valve and evaporimeter and connects to form the refrigeration unit loop successively.Be connected in parallel between the row of compressor, the air entry magnetic valve and injector, the oil return ejecting port of injector links to each other with the oil return opening of evaporimeter.Its design feature is that the oil return opening of described evaporimeter is connected to the high liquid level and the low liquid level place of evaporimeter cavity inner refrigerant liquid level respectively through upper and lower two chamber passages.The outside of epicoele channel outlet and cavity of resorption channel outlet is provided with vertical guide rail, and guide rail is provided with it and is slidingly connected, has the baffle plate of oval slotted hole, and the top of baffle plate connects ball float.

The utility model is owing to having adopted said structure, with cold-producing medium liquid level position automatic shutter epicoele channel outlet or cavity of resorption channel outlet.Make unit when any operating mode is moved, utilize the higher fluid mixing material of oil content to swim in the characteristics on cold-producing medium top, it is returned compressor by " injection principle " injection, make the flooded evaporator refrigeration unit can both be efficiently when the operation of any operating mode, reliable oil return, and make refrigeration unit have higher running efficiency.

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model evaporation structure schematic diagram;

Fig. 3 is that the F of Fig. 2 is to enlarged diagram.

The specific embodiment

Referring to Fig. 1 to Fig. 3, the utility model comprises by compressor 4, condenser 5, expansion valve 6 and evaporimeter 3 and connects to form the refrigeration unit loop successively.Be connected in parallel between the row of compressor 4, the air entry magnetic valve 1 and injector 7, the oil return ejecting port of injector 7 links to each other with the oil return opening of evaporimeter 3.The oil return opening of evaporimeter 3 is connected to the high liquid level and the low liquid level place of evaporimeter 3 cavity inner refrigerant liquid levels respectively through upper and lower two chamber passages.Epicoele channel outlet A is provided with vertical guide rail 2 with the outside of cavity of resorption channel outlet B, and guide rail 2 is provided with it and is slidingly connected, has the baffle plate 9 of oval slotted hole 9.1, and the top of baffle plate 9 connects ball float 8.

During the refrigeration unit operation, the controller function magnetic valve 1 of refrigeration unit is opened, and the high temperature and high pressure gas by compressor 4 is discharged carries out " injection " oil return by 7 pairs of evaporimeter 3 oil return openings of injector, makes the oil in the evaporimeter 3 return compressor 4.The oil return process is divided into two kinds:

1, when the refrigeration unit oepration at full load, evaporimeter 3 inner refrigerant liquid levels are higher, and a large amount of higher fluid mixing materials of oil content swim in epicoele channel outlet A place.The ball float 8 drive baffle plates 9 that swim on the cold-producing medium liquid level move upward along guide rail 2, by the slotted hole on the baffle plate 9 9.1 epicoele channel outlet A are opened, and cavity of resorption channel outlet B closes.At this moment, the fluid mixing material at epicoele channel outlet A place is returned compressor 4 by injection.

2, when unit operation at part load or variable parameter operation, evaporimeter 3 inner refrigerant liquid levels are lower, and a large amount of higher fluid mixing materials of oil content swim in cavity of resorption channel outlet B place.The ball float 8 drive baffle plates 9 that swim on the cold-producing medium liquid level move down along guide rail 2, by the slotted hole on the baffle plate 9 9.1 cavity of resorption channel outlet B are opened, and epicoele channel outlet A closes.Like this, the fluid mixing material at cavity of resorption channel outlet B place is returned compressor 4 by injection.

Claims

1. use the refrigeration unit of efficient oil return flooded evaporator, it comprises by compressor (4), condenser (5), expansion valve (6) and evaporimeter (3) connect to form the refrigeration unit loop successively, the row of compressor (4), magnetic valve (1) and injector (7) are connected in parallel between the air entry, the oil return ejecting port of injector (7) links to each other with the oil return opening of evaporimeter (3), it is characterized in that, the oil return opening of described evaporimeter (3) passes through respectively, two chamber passages are connected to the high liquid level and the low liquid level place of evaporimeter (3) cavity inner refrigerant liquid level down, the outside of epicoele channel outlet (A) and cavity of resorption channel outlet (B) is provided with vertical guide rail (2), guide rail (2) is provided with it and is slidingly connected, the baffle plate (9) that has oval slotted hole (9.1), the top of baffle plate (9) connects ball float (8).