CN209512342U - It is low to follow a barrel oil return refrigeration system - Google Patents

Abstract

Low a barrel oil return refrigeration system is followed the utility model relates to a kind of, it is related to the technical field of refrigeration equipment, it includes that be sequentially communicated low follows bucket, fuel feed pump, refrigeration compressor and oil return pipe, further includes the flow container being sequentially communicated, liquid supply pipe, refrigeration compressor, refrigerator pipes, evaporator and liquid back pipe；Plate is installed on the fuel feed pump to change；The fuel feed pump is divided into two sections, and it is first to be in charge of that plate, which is arranged in, to change with low one followed between bucket section, is arranged in one section that plate changes between refrigeration compressor and is in charge of for second, and first is in charge of to be in charge of with second and is connected to；It is connected with third on the liquid supply pipe to be in charge of, the other end that third is in charge of is connected to plate and changes, and changes the 4th for being connected with and being in charge of with third and being connected in plate and is in charge of, the 4th other end being in charge of is connected to liquid supply pipe；Refrigerant and oil liquid carry out heat exchange in plate changes and cool down to realize to refrigerant.The utility model has is freezed refrigerant in advance, and the air in refrigerant is first made to carry out liquefied effect.

Description

It is low to follow a barrel oil return refrigeration system

Technical field

The utility model relates to the technical fields of refrigeration equipment, follow a barrel oil return refrigeration system more particularly, to one kind is low.

Background technique

Refrigeration equipment refers to and is mainly used for the equipment that food cold storage, freight all kinds refrigeration and the room air on hot summer days are adjusted. Mainly it is made of compressor, expansion valve, evaporator, condenser and pipeline.Compression refrigeration equipment can be divided by working principle, absorbed Refrigeration equipment, steam jet refrigeration equipment, heat pump refrigeration equipment and electrothermal refrigeration device etc..By the working cycles of equipment by object Body and surrounding heat remove, and cause and maintain certain low-temperature condition.Presently used refrigerant be mainly freon and Ammonia is used especially with freon most.

As shown in Figure 1, being connected with fuel feed pump 2 in the low downside for following bucket 1, the other end of fuel feed pump 2 is connected to refrigerant compression On machine 3, oil return pipe 4 is provided on refrigeration compressor 3, the other end of oil return pipe 4 is connected to low follow on bucket 1.Under flow container 5 Side is connected with liquid supply pipe 6, and the other end of liquid supply pipe 6 is connected on refrigeration compressor 3, there is refrigerator pipes 7 on refrigeration compressor 3, The other end of refrigerator pipes 7 is connected on evaporator 8, and liquid back pipe 9 is connected on evaporator 8, and one end of liquid back pipe 9 is connected to liquid On tank 5.Wherein, low follow is equipped with oil liquid in bucket 1, and refrigerant is housed in flow container 5.

When being freezed, the low oil liquid followed in bucket 1 is flowed out via fuel feed pump 2, is flowed in refrigeration compressor 3, for refrigeration Compressor 3 uses.Refrigerant in flow container 5 flows out in refrigeration compressor 3 via refrigerator pipes 7, and refrigerant is in refrigeration compressor 3 Middle pressurization vaporization, and a large amount of heat is released during refrigerant is in vaporization, form high pressure low temperature gas, high pressure low temperature gas Body is condensed in refrigeration compressor 3, is finally entered in evaporator 8 via refrigerator pipes 7, by evaporator 8 to ambient enviroment Cool down, after refrigerant completes the process of cooling in evaporator 8, flows back in flow container 5 and be depressured via liquid back pipe 9, from And complete refrigeration cycle.Wherein, refrigeration compressor 3 the oil liquid used via oil return pipe 4 flow back to it is low follow in bucket 1, to complete The recycling of oil liquid.

Prior art among the above has the following deficiencies: in actual oil circulation, generally can be in the refrigerant The medium for adding some carbon dioxide or nitrogen class is carried out in refrigerant from outflow again is back in flow container 5 in evaporator 8 Temperature when circulation, when the temperature of refrigerant is normal.For example, the temperature after refrigeration is 0 degree, temperature when without refrigeration It is 5 degree.But when refrigerant is in normal temperature, the media such as carbon dioxide or nitrogen are in gaseous state, are blended in refrigerant In, so that the unit liquid in refrigerant is also needed the gas compression in refrigerant in cooling into liquid, to need Want longer cooling time.

Utility model content

The purpose of the utility model is to provide it is a kind of it is low follow a barrel oil return refrigeration system, refrigerant compression can be entered in refrigerant Just freezed in advance to refrigerant before being freezed in machine, refrigerant is freezed in advance, first makes the air in refrigerant It liquefies, to reduce refrigeration compressor to the integrally cooling time of refrigerant.

The above-mentioned purpose of utility model of the utility model has the technical scheme that

One kind is low to follow a barrel oil return refrigeration system, and fuel feed pump is connected on the downside of bucket in low follow equipped with oil liquid, fuel feed pump The other end is connected on refrigeration compressor, and oil return pipe is provided on refrigeration compressor, and the other end of oil return pipe is connected to low follow On bucket；It is connected with liquid supply pipe on the downside of the flow container equipped with refrigerant, the other end of liquid supply pipe is connected on refrigeration compressor, There are refrigerator pipes on refrigeration compressor, the other end connection of refrigerator pipes on an evaporator, is connected with liquid back pipe on an evaporator, returns liquid One end of pipe is connected on flow container；

Plate is installed on the fuel feed pump to change；

The fuel feed pump is divided into two sections, and it is first to be in charge of that plate, which is arranged in, to change with low one followed between bucket section, and setting is changed in plate One section between refrigeration compressor is in charge of for second, and first is in charge of to be in charge of with second and is connected to；

It is connected with third on the liquid supply pipe to be in charge of, the other end that third is in charge of is connected to plate and changes, and changes connection in plate There is the be in charge of with third and be connected to the 4th to be in charge of, the 4th other end being in charge of is connected to liquid supply pipe；

Refrigerant and oil liquid carry out heat exchange in plate changes and cool down to realize to refrigerant.

By using above-mentioned technical proposal, when being freezed, the low oil liquid that follows in bucket flows into first and is in charge of, via the One is in charge of and flows into during plate changes, and oil liquid is heated in plate changes, so that the non-oil substances in oil liquid gasify during heating It is separated with oil liquid.After oil liquid completes heating, it is in charge of from second and flows into refrigeration compressor for refrigeration compressor use.Flow container In refrigerant flow into liquid supply pipe, and refrigerant carries out branch in liquid supply pipe, and is divided into Liang Tiaolu, a part of system Cryogen flows into refrigeration compressor along liquid supply pipe to cool down, and the refrigerant of another part is in charge of inflow plate via third and is changed In, cool down in plate changes, so that the gas liquefaction and refrigerant in refrigerant mix.Refrigerant completes cooling Afterwards, from the 4th be in charge of in flow back to the liquid in liquid supply pipe and mixed, to reduce the system of original normal temperature in liquid supply pipe The temperature of cryogen.In plate changes, it is identical as the heat that refrigerant is released that oil liquid heats absorbed temperature, so that during plate changes Heat balance.

To sum up, in the process of refrigeration, refrigerant and oil liquid carry out heat exchange to refrigeration compressor in plate changes, so that oil liquid Refrigerant supercooling is heated, and the refrigerant after supercooling is mixed with the refrigerant not being subcooled, reduces the whole temperature of refrigerant It spends, so that the media liquefaction such as carbon dioxide in refrigerant, reduces supercooling of the refrigerant of unit liquid in refrigeration compressor Time.

The utility model is further arranged to: the third be in charge of and the 4th be in charge of between balance pipe is installed.

By using above-mentioned technical proposal, when there are when pressure difference, balance can be passed through between first is in charge of and the 4th is in charge of Pipe carries out fluid infusion, allows third to be in charge of and is in charge of holding hydro-cushion with the 4th.

The utility model is further arranged to: the diameter of balance pipe be set smaller than third be in charge of be in charge of with the 4th it is straight Diameter.

By using above-mentioned technical proposal, prevents refrigerant to be directly over balance pipe and be in charge of inflow the 4th from third and be in charge of In, and appearance the case where changed without plate.

The utility model is further arranged to: described low to follow being internally provided with for bucket and first be in charge of middle oil liquid stream for adjusting The ball-cock assembly of amount is fixedly connected with oil guide pipe on the low inner wall for following bucket, and oil guide pipe is in charge of with first to be connected to；

The ball-cock assembly includes being fixedly connected on the low support followed on barrel inner wall, hinged hinge bar on the support, fixation The floating ball being connected on the hinge bar other end, the follower lever being hinged on hinge bar and the cunning being hinged on the follower lever other end Plate, slide plate lid are located at the nozzle of oil guide pipe.

By using above-mentioned technical proposal, when in use, floating ball is followed low with the low height for following liquid level in bucket to change Position in bucket, and floating ball is when moving, and hinge bar can move together with floating ball, so that hinge bar rotates, and Hinge bar drives follower lever movement, follower lever can be made to pull slide plate, to change the face that slide plate lid is located on oil guide pipe Product can change the amount that oil liquid enters in oil guide pipe, adjust the first flow for being in charge of middle oil liquid.

The utility model is further arranged to: the two sides of the slide plate are respectively arranged with baffle, and baffle is vertical with slide plate solid Surely it links together, and the position of two baffle arrangements is located at the two sides of follower lever, when slide plate is arranged on oil guide pipe, baffle It is contacted with the outer wall of oil guide pipe.

By using above-mentioned technical proposal, when slide plate is caught in oil guide pipe, certain rotation can occur for slide plate, can just make It obtains slide plate to slide into oil guide pipe, the two sides in slide plate is provided with the baffle contacted with Oil Guide pipe outer wall, allow baffle to slide plate Rotation limited, anti-baffle plate because rotation and there is a situation where detents with oil guide pipe, to effectively prevent floating ball Detent.

The utility model is further arranged to: the oil guide pipe is set as square tube.

By using above-mentioned technical proposal, baffle is fit together with oil guide pipe, baffle is allowed to connect with oil guide pipe Touching more closely, can preferably anti-limited slip plate occur with the case where oil guide pipe detent.

The utility model is further arranged to: it is respectively fixedly connected on two baffles there are two U-shaped board, U-shaped board Both ends are fixed together with two baffles respectively.

By using above-mentioned technical proposal, so that a ring is integrally formed in two baffles and two U-shaped boards, by Oil Guide pipe sleeve Firmly.When at the one side edge of skateboarding to oil guide pipe, a U-shaped board is contacted with oil guide pipe, sliding from oil guide pipe to slide plate Under limited, anti-limited slip plate is slided from oil guide pipe.Slide plate is limited by the way that two U-shaped boards are arranged, what can be imitated is anti- Limited slip plate is slided from oil guide pipe.

The utility model is further arranged to: the support and the low connection followed between barrel inner wall are set as detachably connecting It connects.

By using above-mentioned technical proposal, staff is removed support from the low inner wall for following bucket, thus Ball-cock assembly is replaced.

The utility model is further arranged to: the low bucket that follows is internally provided with two mounting plates, and support setting exists It is bonded between two mounting plates and with two mounting plates, is equipped on mounting plate and support and is fixedly connected with support with mounting plate Installation bolt together.

By using above-mentioned technical proposal, staff can realize the peace to support by the adjusting to installation bolt It fills and removes, so that staff be facilitated to load and unload ball-cock assembly.

The utility model is further arranged to: the caulking groove for support insertion, caulking groove are offered on the low inner wall for following bucket It is arranged between two mounting plates.

By using above-mentioned technical proposal, when being mounted on support between two mounting plates, support is embedded in caulking groove, is made The rotation for obtaining support is limited by caulking groove, to prevent support from rotating.Staff can also be equipped with two on a mounting board A installation bolt prevents support from rotating.

In conclusion the advantageous effects of the utility model are as follows:

1. being changed by arranging plate, in the process of refrigeration, refrigerant and oil liquid carry out hot friendship to refrigeration compressor in plate changes It changes, so that oil liquid heating refrigerant supercooling, and the refrigerant after supercooling is mixed with the refrigerant not being subcooled, reduces refrigeration The bulk temperature of agent, so that the media liquefaction such as carbon dioxide in refrigerant, reduces the refrigerant of unit liquid in refrigerant compression Cool time is crossed in machine；

2. allowing third to be in charge of by setting balance pipe and being in charge of holding hydro-cushion with the 4th；

3. can effectively prevent floating ball detent by setting ball-cock assembly.

Detailed description of the invention

Fig. 1 is the low schematic diagram for following barrel oil return system in the prior art；

Fig. 2 follows a barrel schematic diagram for oil return refrigeration system to be low in the present embodiment；

Fig. 3 is that plate changes that connection first is in charge of, second is in charge of, third is in charge of and the 4th signal being in charge of in the present embodiment Figure；

Fig. 4 is the low schematic diagram for following setting ball-cock assembly in bucket in the present embodiment；

Fig. 5 is the schematic diagram of ball-cock assembly in the present embodiment；

Fig. 6 is support in the present embodiment and the low structural schematic diagram followed when bucket is connect.

In figure, 1, low follow bucket；2, fuel feed pump；201, first is in charge of；202, second is in charge of；3, refrigeration compressor；4, oil return Pipe；5, flow container；6, liquid supply pipe；7, refrigerator pipes；8, evaporator；9, liquid back pipe；10, plate changes；11, third is in charge of；12, the 4th point Pipe；13, balance pipe；14, ball-cock assembly；141, support；142, hinge bar；143, floating ball；144, follower lever；145, slide plate；146, Baffle；147, U-shaped board；148, mounting plate；149, bolt is installed；15, oil guide pipe；16, caulking groove.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

Referring to Fig. 2, Fig. 3, a barrel oil return refrigeration system is followed for one kind disclosed by the utility model is low, in the low downside for following bucket 1 It is connected with fuel feed pump 2, the other end of fuel feed pump 2 is connected on refrigeration compressor 3, is provided with oil return pipe on refrigeration compressor 3 4, the other end of oil return pipe 4 is connected to low follow on bucket 1.It is connected with liquid supply pipe 6 in the downside of flow container 5, the other end of liquid supply pipe 6 connects It connecing on refrigeration compressor 3, there is refrigerator pipes 7 on refrigeration compressor 3, the other end of refrigerator pipes 7 is connected on evaporator 8, Liquid back pipe 9 is connected on evaporator 8, one end of liquid back pipe 9 is connected on flow container 5.Wherein, low to follow in bucket 1 equipped with oil liquid, flow container Refrigerant is housed in 5.

In order to be freezed in advance to refrigerant, plate is installed on fuel feed pump 2 and changes 10.(plate changes 10, is also plate-type heat-exchange Device, plate heat exchanger are a series of a kind of high-performance heat exchangers as made of sheet metal closed assemblies with certain corrugated shape.It is various Thin rectangular shape channel is formed between plate, and heat exchange is carried out by plate.Plate heat exchanger is liquid-liquid, the liquid-hot friendship of vapour progress The ideal equipment changed.It is high with heat exchange efficiency, heat loss is small, advantages of compact and light structure, occupied area is small, is widely used, uses The features such as service life is long.)

It is two sections that fuel feed pump 2, which is divided to, be arranged in plate change 10 and low one followed between bucket 1 section be first to be in charge of 201, be arranged in plate One section changed between 10 and refrigeration compressor 3 is second to be in charge of 202, and first, which is in charge of 201, is in charge of 202 with second and is connected to.It is low to follow bucket 1 In oil liquid flow into and first be in charge of in 201, be in charge of 201 inflow plates via first and change in 10, oil liquid is changed in 10 in plate and is heated, It is separated so that the non-oil substances in oil liquid gasify during heating with oil liquid.After oil liquid completes heating, from second point Pipe 202 is flowed into refrigeration compressor 3 and is used for refrigeration compressor 3.

It is connected with third on liquid supply pipe 6 and is in charge of 11, the other end that third is in charge of 11 is connected to plate and changes on 10, changes 10 in plate On be connected with third be in charge of 11 be connected to the 4th be in charge of 12, the 4th other end for being in charge of 12 is connected to liquid supply pipe 6.In flow container 5 Refrigerant flow into liquid supply pipe 6, and refrigerant carries out branch in liquid supply pipe 6, and is divided into Liang Tiaolu, a part of system Cryogen flows into refrigeration compressor 3 along liquid supply pipe 6 to cool down, and the refrigerant of another part is in charge of 11 inflow plates via third It changes in 10, changes in 10 and cool down in plate, so that the gas liquefaction and refrigerant in refrigerant mix.Refrigerant is complete After cooling, be in charge of the liquid flowed back in liquid supply pipe 6 in 12 from the 4th and mixed, thus reduce in liquid supply pipe 6 it is original just The temperature of the refrigerant of normal temperature.

Wherein, it is changed in 10 in plate, the absorbed temperature of oil liquid heating is identical as the heat that refrigerant is released, so that plate Change the heat balance in 10.

To sum up, in the process of refrigeration, refrigerant and oil liquid change in plate and carry out heat exchange in 10 refrigeration compressor 3, so that Oil liquid heats refrigerant supercooling, and the refrigerant after supercooling is mixed with the refrigerant not being subcooled, reduces the whole of refrigerant Temperature, so that the media liquefaction such as carbon dioxide in refrigerant, reduces the refrigerant of unit liquid in refrigeration compressor 3 Cross cool time.

In order to allow third be in charge of 11 and the 4th be in charge of pressure balance in 12, be not in refrigerant adverse current the case where, Third is in charge of 11 and the 4th and is in charge of between 12 and is equipped with balance pipe 13, is in charge of 201 and the 4th and is in charge of between 12 and there is pressure when first When poor, fluid infusion can be carried out by balance pipe 13, allow third to be in charge of 11 and the 4th and be in charge of 12 holding hydro-cushions.Wherein, it will put down Weighing apparatus pipe 13 diameter be set smaller than third be in charge of 11 and the 4th be in charge of 12 diameter, prevent refrigerant to be directly over balance pipe 13 Appearance the case where being in charge of 11 inflows the 4th from third to be in charge of in 12, and changing 10 without plate.

In conjunction with Fig. 3, Fig. 4, being internally provided with for adjusting the first floating ball for being in charge of oil liquid flow in 201 of bucket 1 is followed low Valve 14, is fixedly connected with oil guide pipe 15 on the low inner wall for following bucket 1, and oil guide pipe 15 is in charge of 201 with first and is connected to.It is floating by being arranged Ball valve 14 is adjusted to be in charge of the oil liquid in 201 to entrance first.

In conjunction with Fig. 4, Fig. 5, ball-cock assembly 14 includes being fixedly connected on the low support 141 followed on 1 inner wall of bucket, being hinged on support Hinge bar 142 on 141, the floating ball 143 being fixedly connected on 142 other end of hinge bar, be hinged on it is driven on hinge bar 142 Bar 144 and the slide plate 145 being hinged on 144 other end of follower lever, the lid of slide plate 145 are located at the nozzle of oil guide pipe 15.

When in use, floating ball 143 changes with the low height for following liquid level in bucket 1 in the low position followed in bucket 1, Er Qiefu When moving, hinge bar 142 can move together ball 143 with floating ball 143, so that hinge bar 142 rotates, and hinge bar 142 drive follower lever 144 to move, and follower lever 144 can be made to pull slide plate 145, so that changing the lid of slide plate 145 is located at Oil Guide Area on pipe 15 can change the amount that oil liquid enters in oil guide pipe 15, adjust the first flow for being in charge of oil liquid in 201.

In prolonged use, floating ball 143 is constantly moved in low follow in bucket 1.But slide plate is driven in floating ball 143 145 on oil guide pipe 15 when moving, and since the motion range of floating ball 143 is bigger, the edge of slide plate 145 may be made to slide into In oil guide pipe 15, lead to oil guide pipe 15 and slide plate 145 to the movement detent of floating ball 143, slide plate 145 is caused to carry out oil guide pipe 15 It blocks, allows and low follow the oil liquid in bucket 1 and can not be flowed out from oil guide pipe 15.

It is respectively arranged with baffle 146 in the two sides of slide plate 145, baffle 146 is vertical with slide plate 145 to be fixed together, And the position of two baffles 146 arrangement is located at the two sides of follower lever 144, when slide plate 145 is arranged on oil guide pipe 15, baffle 146 contact with the outer wall of oil guide pipe 15.When slide plate 145 is caught in oil guide pipe 15, certain rotation can occur for slide plate 145, Slide plate 145 can be made to slide into oil guide pipe 15, by being provided with the baffle contacted with 15 outer wall of oil guide pipe in the two sides of slide plate 145 146, allow baffle 146 to limit the rotation of slide plate 145, with oil guide pipe 15 detent occurs for anti-baffle plate 146 because of rotation The case where, to effectively prevent 143 detent of floating ball.

It, being capable of better anti-limited slip plate 145 and oil guide pipe 15 in order to allow baffle 146 to contact more closely with oil guide pipe 15 The case where detent, occurs, and sets square tube for oil guide pipe 15, baffle 146 is fit together with oil guide pipe 15.

Floating ball 143 is when pulling slide plate 145, once the motion range of floating ball 143 is larger, may allow slide plate 145 It is slided from oil guide pipe 15, so as to cause that can not be adjusted in the flow or oil pressure being in charge of first in 201, in order to prevent The case where slide plate 145 is slided from oil guide pipe 15 appearance is respectively fixedly connected with there are two U-shaped board 147, U on two baffles 146 The both ends of template 147 are fixed together with two baffles 146 respectively, so that two baffles 146 and two U-shaped boards 147 are whole Body forms a ring, and oil guide pipe 15 is entangled.When at the one side edge that slide plate 145 moves to oil guide pipe 15, a U-shaped board 147 contact with oil guide pipe 15, slide and limit from oil guide pipe 15 to slide plate 145, and anti-limited slip plate 145 is sliding from oil guide pipe 15 Under.Slide plate 145 is limited by the way that two U-shaped boards 147 are arranged, the anti-limited slip plate 145 that can be imitated is slided from oil guide pipe 15.

After a protracted use, ball-cock assembly 14 is whole contacts with lubricating oil for a long time, whole to ball-cock assembly 14 may make At corrosion, although ball-cock assembly 14 is coated with protective layer on the whole, with the increase for using the time, protective layer may result in Failure is corroded thus whole to ball-cock assembly 14, is caused to damage to ball-cock assembly 14 is whole, is made ball-cock assembly 14 accurately right It is adjusted into the oil liquid in oil guide pipe 15.In order to allow ball-cock assembly 14 to be conveniently replaceable, by support 141 and it is low follow 1 inner wall of bucket it Between connection be set as being detachably connected, staff will be removed on inner wall that support 141 is in charge of 201 from first, To be replaced to ball-cock assembly 14.

Specifically, in conjunction with Fig. 5, Fig. 6, two mounting plates 148 are internally provided in the low bucket 1 that follows, and support 141 is set It sets between two mounting plates 148 and is bonded with two mounting plates 148, is equipped on mounting plate 148 and support 141 by support The 141 installation bolts 149 being fixed together with mounting plate 148, staff can pass through the adjusting to installation bolt 149 It realizes the installation to support 141 and removes, so that staff be facilitated to load and unload ball-cock assembly 14.

Support 141 is installed bolt 149 between two mounting plates 148 and is rotated for axis in order to prevent, leads to slide plate Deviation occurs for 145 position, and the caulking groove 16 being embedded in for support 141 is offered on the low inner wall for following bucket 1, and caulking groove 16 is arranged two Between a mounting plate 148, when support 141 to be mounted between two mounting plates 148, support 141 is embedded in caulking groove 16, so that The rotation of support 141 is limited by caulking groove 16, to prevent support 141 from rotating.Staff can also be on mounting plate 148 Bolt 149 is installed to prevent support 141 from rotating there are two wearing.

In order to allow floating ball 143 to be easier to drive skateboarding, several through-holes are offered, on hinge bar 142 to reduce The weight of hinge bar 142 allows floating ball 143 to be easier that hinge bar 142 is driven to move when floating, and slides so as to be easier to drive Plate movement.

The implementation principle of the present embodiment are as follows: in the process of refrigeration, refrigerant and oil liquid change in 10 refrigeration compressor 3 in plate Heat exchange is carried out, so that oil liquid heating refrigerant supercooling, and the refrigerant after supercooling is mixed with the refrigerant not being subcooled, The bulk temperature of refrigerant is reduced, so that the media liquefaction such as carbon dioxide in refrigerant, the refrigerant for reducing unit liquid exist Cool time is crossed in refrigeration compressor 3.

The embodiment of present embodiment is the preferred embodiment of the utility model, and not limitation is originally practical new according to this The protection scope of type, therefore: the equivalence changes that all structures, shape, principle according to the utility model are done should all be covered by practical Within novel protection scope.

Claims (10)

1. one kind is low to follow a barrel oil return refrigeration system, fuel feed pump (2), fuel feeding are connected in low follow on the downside of bucket (1) equipped with oil liquid The other end of pipe (2) is connected on refrigeration compressor (3), is provided on refrigeration compressor (3) oil return pipe (4), oil return pipe (4) The other end be connected to low follow on bucket (1)；Liquid supply pipe (6), liquid supply pipe are connected on the downside of the flow container (5) equipped with refrigerant (6) the other end is connected on refrigeration compressor (3), is had on refrigeration compressor (3) refrigerator pipes (7), refrigerator pipes (7) it is another End is connected on evaporator (8), is connected on evaporator (8) liquid back pipe (9), one end of liquid back pipe (9) is connected to flow container (5) On；

It is characterized by: being equipped with plate on the fuel feed pump (2) changes (10)；

The fuel feed pump (2) is divided into two sections, and setting changes (10) and low one section followed between bucket (1) in plate and is in charge of (201) for first, One section changed between (10) and refrigeration compressor (3) in plate is arranged to be in charge of (202) for second, first is in charge of (201) and second point Manage (202) connection；

Third being connected on the liquid supply pipe (6) to be in charge of (11), the other end that third is in charge of (11) is connected to plate and changes on (10), Plate, which changes to be connected on (10), to be in charge of the (11) are connected to the 4th with third and is in charge of (12), and the 4th other end for being in charge of (12) is connected to confession Liquid pipe (6)；

Refrigerant and oil liquid change in (10) in plate carries out heat exchange to which realization cools down to refrigerant.

2. one kind according to claim 1 is low to follow a barrel oil return refrigeration system, it is characterised in that: the third be in charge of (11) and 4th is in charge of between (12) and is equipped with balance pipe (13).

3. one kind according to claim 2 is low to follow a barrel oil return refrigeration system, it is characterised in that: the diameter of balance pipe (13) is set It is set to and is less than third and is in charge of (11) and the 4th and is in charge of the diameter of (12).

4. one kind according to claim 3 is low to follow a barrel oil return refrigeration system, it is characterised in that: described low to follow the interior of bucket (1) Portion is provided with for adjusting the first ball-cock assembly (14) for being in charge of oil liquid flow in (201), fixed on the low inner wall for following bucket (1) to connect It is connected to oil guide pipe (15), oil guide pipe (15) is in charge of (201) with first and is connected to；

The ball-cock assembly (14) includes being fixedly connected on the low support (141) followed on bucket (1) inner wall, being hinged on support (141) Hinge bar (142), be fixedly connected on hinge bar (142) other end floating ball (143), be hinged on hinge bar (142) Follower lever (144) and the slide plate (145) being hinged on follower lever (144) other end, slide plate (145) lid are located at oil guide pipe (15) Nozzle at.

5. one kind according to claim 4 is low to follow a barrel oil return refrigeration system, it is characterised in that: the two of the slide plate (145) Side is respectively arranged with baffle (146), and baffle (146) is vertical with slide plate (145) to be fixed together, and two baffles (146) position arranged is located at the two sides of follower lever (144), when slide plate (145) is arranged on oil guide pipe (15), baffle (146) It is contacted with the outer wall of oil guide pipe (15).

6. one kind according to claim 5 is low to follow a barrel oil return refrigeration system, it is characterised in that: oil guide pipe (15) setting For square tube.

7. one kind according to claim 6 is low to follow a barrel oil return refrigeration system, it is characterised in that: two baffles (146) On be respectively fixedly connected with there are two U-shaped board (147), the both ends of U-shaped board (147) are fixedly connected on two baffles (146) respectively Together.

8. one kind according to claim 7 is low to follow a barrel oil return refrigeration system, it is characterised in that: the support (141) with it is low The connection followed between bucket (1) inner wall is set as being detachably connected.

9. one kind according to claim 8 is low to follow a barrel oil return refrigeration system, it is characterised in that: the low bucket (1) that follows is internal Setting there are two mounting plate (148), and support (141) be arranged between two mounting plates (148) and with two mounting plates (148) it is bonded, is equipped on mounting plate (148) and support (141) and is fixedly connected on support (141) and mounting plate (148) Installation bolt (149) together.

10. one kind according to claim 9 is low to follow a barrel oil return refrigeration system, it is characterised in that: described low to follow the interior of bucket (1) The caulking groove (16) for support (141) insertion is offered on wall, caulking groove (16) is arranged between two mounting plates (148).