CN211146996U

CN211146996U - Multi-connected fan control system

Info

Publication number: CN211146996U
Application number: CN201922360488.XU
Authority: CN
Inventors: 桑青山
Original assignee: Guangzhou Maorun Laboratory Equipment Technology Co ltd
Current assignee: Guangzhou Maorun Laboratory Equipment Technology Co ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-07-31
Anticipated expiration: 2029-12-25

Abstract

The utility model discloses a many fan control system that ally oneself with relates to control system technical field, for solving the current not high problem of many fan control system reliability that ally oneself with. A four-way valve is arranged in the control system, a first oil separator and a first compressor are sequentially arranged on one side of the four-way valve, and the first oil separator is connected with the four-way valve through a first return pipe; the other side of the four-way valve is connected with a second heat exchanger through a return pipe III, and a second oil separator and a second compressor are sequentially arranged above the second heat exchanger; a first heat exchanger is connected below the four-way valve through a return pipe IV, a liquid storage tank is connected above the four-way valve through a return pipe II, first oil conveying pipes are arranged below the first heat exchanger and the second heat exchanger, a pressure reduction fine copper pipe and an oil return pipe are sequentially connected to one side of each first oil conveying pipe, and the oil return pipes are connected to corresponding compressors; one side of first heat exchanger and second heat exchanger all is provided with the defeated oil pipe of second, and the defeated oil pipe's of second one end and return oil pipe and be connected.

Description

Multi-connected fan control system

Technical Field

The utility model relates to a control system technical field specifically is a many fan control system that ally oneself with.

Background

In building and building, the fan is widely used. The traditional experiment building usually adopts a large fan to provide air volume for the whole experiment building, all control operations of the large fan can be completed by a controller, the application of the multi-split air conditioner is more and more extensive at present, the sales proportion of the multi-split air conditioner is more and more large in the central air conditioner, the multi-split air conditioner unit is an outdoor unit which can be connected with a plurality of indoor units, and the number of the indoor units is 1-32. The refrigerating system is a ring pipe network system composed of refrigerating compressor, electronic expansion valve, other valve bodies and serial pipelines, and can timely meet the indoor cold and heat load requirements by controlling the refrigerant circulation amount of the compressor and the refrigerant flow entering each indoor heat exchanger. The multi-connected air conditioning unit has the advantages of energy conservation, intelligent adjustment, accurate temperature control and the like, and each indoor unit can be independently adjusted, so that the requirements of different spaces and different air conditioning loads can be met.

The existing multi-connected fan control system has low reliability; therefore, the existing requirements are not met, and a multi-connected fan control system is provided for the existing requirements.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a many fan control system that ally oneself with to the current problem that many fan control system reliability is not high that proposes in solving above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a four-way valve is arranged in the multi-connected fan control system, a first oil separator and a first compressor are sequentially arranged on one side of the four-way valve, and the first oil separator is connected with the four-way valve through a first return pipe; the other side of the four-way valve is connected with a second heat exchanger through a return pipe III, and a second oil separator and a second compressor are sequentially arranged above the second heat exchanger; a first heat exchanger is connected below the four-way valve through a return pipe IV, a liquid storage tank is connected above the four-way valve through a return pipe II, first oil conveying pipes are arranged below the first heat exchanger and the second heat exchanger, a pressure reduction fine copper pipe and an oil return pipe are sequentially connected to one side of each first oil conveying pipe, and the oil return pipes are connected to corresponding compressors; a second oil conveying pipe is arranged on one side of each of the first heat exchanger and the second heat exchanger, and one end of each second oil conveying pipe is connected with the oil return pipe; the four-way valve is internally provided with a fixture block, the number of the heaters is three, and the three heaters are all electrically connected with the temperature controller.

Preferably, an oil return valve is arranged inside the oil return pipe.

Preferably, an electronic expansion valve is arranged inside the second oil delivery pipe.

Preferably, the temperature controller is a TC100 temperature controller.

Preferably, the first compressor and the second compressor are both electrically connected with the P L C control unit.

Preferably, the P L C control unit is electrically connected to the electronic expansion valve, the oil return valve and the temperature controller, respectively.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses a setting of first defeated oil pipe and the defeated oil pipe of second makes whole control system have many and returns oil pipe way, is convenient for quick flow back to the inside of compressor with fluid, through electronic expansion valve's setting to can reduce the quantity of choke valve, reduce control system's cost, it is convenient simple more to let control.

2. Through setting up temperature controller and heater in the inside of cross valve, can heat fluid to accelerate the speed of backward flow through the setting of first compressor and second compressor, when first compressor received and closed instruction or system was in the little load running state, can start the second compressor and carry out no oily low frequency operation, thereby avoids the phenomenon of oil return difficulty or frequent oil return to appear in the system.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the internal structure of the four-way valve of the present invention;

FIG. 3 is a schematic diagram of a control system of the present invention;

in the figure, the multi-split air blower control system comprises a multi-split air blower control system 1, a first compressor 2, a second compressor 3, an oil return pipe 4, a four-way valve 5, a four-way valve 501, a fixture block 502, a temperature controller 503, a heater 6, a second oil delivery pipe 7, a second oil separator 8, a first oil separator 9, a P L C control unit 10, a liquid storage tank 11, a pressure reduction fine copper pipe 12, an oil return valve 13, an electronic expansion valve 14, a first heat exchanger 15, a second heat exchanger 16, a first oil delivery pipe 17, a first return pipe 18, a second return pipe 19, a third return pipe 20 and a fourth return pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, the present invention provides an embodiment: a multi-connected fan control system comprises a multi-connected fan control system 1, a four-way valve 5 is arranged in the multi-connected fan control system 1, a first oil separator 8 is arranged on one side of the four-way valve 5, a first compressor 2 is arranged on one side of the first oil separator 8, the first oil separator 8 is fixedly connected with the four-way valve 5 through a first return pipe 17, a second heat exchanger 15 is arranged on the other side of the four-way valve 5, the second heat exchanger 15 is fixedly connected with the four-way valve 5 through a third return pipe 19, a second oil separator 7 is arranged above the second heat exchanger 15, a second compressor 3 is arranged on one side of the second oil separator 7, a first heat exchanger 14 is arranged below the four-way valve 5, the first heat exchanger 14 is fixedly connected with the four-way valve 5 through a fourth return pipe 20, a liquid storage tank 10 is arranged above the four-, first defeated oil pipe 16 all is provided with in the below of first heat exchanger 14 and second heat exchanger 15, one side of first defeated oil pipe 16 is provided with step-down copper tubule 11, the effect of throttle step-down and regulation flow has been played, one side of step-down copper tubule 11 is provided with back oil pipe 4, and return oil pipe 4's one end respectively with

first compressor

2 and 3 fixed connection of second compressor, one side of first heat exchanger 14 and second heat exchanger 15 all is provided with defeated oil pipe 6 of second, and the one end of defeated oil pipe 6 of second and return oil pipe 4 fixed connection, the inside of four-way valve 5 is provided with fixture block 501, the top of fixture block 501 is provided with heater 503, and heater 503 is provided with threely, three heater 503 all with temperature controller 502 electric connection.

Further, an oil return valve 12 is arranged inside the oil return pipe 4, and the oil return valve 12 is used for controlling the flow and the rest of oil in the oil return pipe 4 and has a sealing function when being closed.

Further, the electronic expansion valve 13 is provided inside the second oil delivery pipe 6, and the electronic expansion valve 13 has a throttling function, so that the cost of the control system can be reduced.

Further, the thermostat 502 is a type TC100 thermostat 502.

Further, the first compressor 2 and the second compressor 3 are both electrically connected to the P L C control unit 9 for controlling the opening and closing of the first compressor 2 and the second compressor 3.

Further, the P L C control unit 9 is electrically connected to the electronic expansion valve 13, the oil return valve 12, and the thermostat 502, respectively, and is configured to control opening and closing of the electronic expansion valve 13, the oil return valve 12, and the thermostat 502.

The working principle is as follows: when in use, the oil-liquid mixture flows out from the interior of the compressor, and the oil liquid enters the heat exchanger for heat exchange under the action of the oil separator, when the oil liquid flows to the decompression copper tube 11 through the first oil pipeline 16 and then flows back to the interior of the compressor through the oil return valve 12, when the flow of the pressure reduction copper tube 11 is low, the electronic expansion valve 13 is opened to switch the oil in the first oil delivery pipe 16 to the second oil delivery pipe 6 in a grading way and return the oil to the inside of the compressor, the temperature controller 502 and the heater 503 are provided in the four-way valve 5 to heat the oil, thereby increasing the speed of the backflow, by the arrangement of the first compressor 2 and the second compressor 3, when the first compressor 2 receives a turn-off command or the system is in a low load operation state, the second compressor 3 can be started to operate without oil at low frequency, so that the phenomenon of difficult or frequent oil return of the system is avoided.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a many fan control system that ally oneself with which characterized in that: a four-way valve (5) is arranged in the multi-connected fan control system (1), a first oil separator (8) and a first compressor (2) are sequentially arranged on one side of the four-way valve (5), and the first oil separator (8) is connected with the four-way valve (5) through a first return pipe (17); the other side of the four-way valve (5) is connected with a second heat exchanger (15) through a return pipe III (19), and a second oil separator (7) and a second compressor (3) are sequentially arranged above the second heat exchanger (15); a first heat exchanger (14) is connected below the four-way valve (5) through a return pipe four (20), a liquid storage tank (10) is connected above the four-way valve (5) through a return pipe two (18), first oil conveying pipes (16) are arranged below the first heat exchanger (14) and the second heat exchanger (15), a pressure reduction fine copper pipe (11) and an oil return pipe (4) are sequentially connected to one side of each first oil conveying pipe (16), and the oil return pipe (4) is connected to a corresponding compressor; one side of each of the first heat exchanger (14) and the second heat exchanger (15) is provided with a second oil conveying pipe (6), and one end of each second oil conveying pipe (6) is connected with the oil return pipe (4); a fixture block (501) is arranged in the four-way valve (5), three heaters (503) are arranged above the fixture block (501), and the three heaters (503) are electrically connected with the temperature controller (502).

2. The multi-split fan control system as claimed in claim 1, wherein: an oil return valve (12) is arranged in the oil return pipe (4).

3. The multi-split fan control system as claimed in claim 1, wherein: and an electronic expansion valve (13) is arranged inside the second oil delivery pipe (6).

4. The multi-split fan control system as claimed in claim 1, wherein: the temperature controller (502) adopts a temperature controller (502) with the model number of TC 100.

5. A multi-split fan control system as claimed in claim 1, wherein the first compressor (2) and the second compressor (3) are electrically connected to a P L C control unit (9).

6. The multi-split fan control system as claimed in claim 5, wherein the P L C control unit (9) is electrically connected with the electronic expansion valve (13), the oil return valve (12) and the temperature controller (502), respectively.