Vortex parallel unit with low cost

Abstract

The utility model discloses a low-cost vortex parallel-connection unit which comprises a compressor unit, a condenser, an evaporator, an economizer and a liquid storage device, and the liquid storage device comprises a plurality of liquid storage units which are connected with one another, and the volume of each liquid storage unit is smaller than a set value. The volume of equipment can be effectively reduced, the flexibility and the applicability of a system can be improved, the volume of a single liquid storage unit is set to be smaller than a set value (such as 30L) under the condition that the performance and safety requirements are met, filing, safety valve installation and regular verification and inspection are not needed, the cost of design, production, reporting and the like is reduced, and the cost is reduced. Compared with an original liquid storage device needing to be recorded, the cost is reduced by about 40%.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration systems, and in particular relates to a low-cost scroll parallel unit. Background Art

[0002] First, in traditional scroll parallel units, the compressor is generally fixed above a horizontal liquid receiver with a volume greater than 30L. This liquid receiver is a pressure vessel that needs to be registered. It must be equipped with a safety valve and calibrated regularly. The inspection process is complicated and costly.

[0003] Secondly, the scroll parallel unit uses a jet reheat compressor. For traditional units, each compressor includes a set of economizer components. The two-head and three-head parallel units require two and three sets of economizer components respectively. Each set of economizer components includes: control computer board, economizer electronic expansion valve, liquid intake solenoid valve economizer, inlet temperature sensor, economizer outlet temperature sensor, exhaust temperature sensor, jet solenoid valve and other components, which are complex to control and costly.

[0004] Therefore, in order to reduce the cost of the vortex parallel unit, the present utility model is proposed. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a low-cost vortex parallel unit.

[0006] To achieve the above purpose, the technical solution of the utility model is:

[0007] A low-cost scroll parallel unit comprises a compressor unit, a condenser, an evaporator, an economizer and a liquid storage device. The liquid storage device comprises a plurality of interconnected liquid storage units with a volume smaller than a set value.

[0008] Furthermore, the volumes of the liquid storage units are the same or different.

[0009] Furthermore, the liquid storage units are connected in series or in parallel.

[0010] Furthermore, the liquid storage units are connected in parallel with each other, and the inlet and / or outlet of each liquid storage unit is provided with a solenoid valve for controlling the opening and closing of the liquid storage unit.

[0011] Furthermore, the low-cost vortex parallel unit also includes: a controller for controlling the opening and closing of the solenoid valve.

[0012] Furthermore,

[0013] The compressor unit comprises a plurality of jet reheat compressors connected in parallel, wherein the suction port, the jet port and the exhaust port of each jet reheat compressor are respectively connected to the first ends of the suction main pipe, the jet main pipe and the exhaust main pipe through branch pipes;

[0014] The inlet of the condenser is connected to the second end of the exhaust main pipe, and the outlet is connected to the main inlet of the economizer through a liquid supply branch, and the liquid reservoir is arranged on the liquid supply branch;

[0015] The inlet of the evaporator is connected to the main outlet of the economizer through a liquid outlet branch, and the outlet is connected to the second end of the suction main pipe;

[0016] The auxiliary road inlet of the economizer is connected to the liquid outlet branch through a liquid intake branch, and the auxiliary road outlet is connected to the second end of the jet main pipe.

[0017] Furthermore, the liquid intake branch is provided with a liquid intake solenoid valve and an electronic expansion valve, and a jet solenoid valve is provided between the jet port of each jet reheat increasing compressor and the jet main pipe.

[0018] Furthermore, the liquid intake branch is provided with a jet inlet temperature sensor, the jet pipe of the economizer is provided with a jet outlet temperature sensor, and the exhaust main pipe is provided with an exhaust temperature sensor.

[0019] Furthermore, an oil separator is provided between the exhaust main pipe and the condenser.

[0020] Furthermore, a gas-liquid separator is provided between the air intake main pipe and the evaporator.

[0021] After adopting the above technical solution, the low-cost vortex parallel unit provided by the utility model has the following beneficial effects compared with the prior art.

[0022] 1. The low-cost vortex parallel unit provided by the utility model is uniquely designed, and its liquid storage device includes multiple liquid storage units with a volume smaller than a set value. This design can effectively reduce the size of the equipment and improve the flexibility and applicability of the system. While meeting performance and safety requirements, the volume of a single liquid storage unit is set to be smaller than a set value (such as 30L). There is no need to file a record, install a safety valve, and perform regular calibration and inspection, thereby reducing the costs of design, production, and filing. Compared with the original liquid storage device that needs to be filed, the cost is reduced by about 40%.

[0023] 2. The low-cost vortex parallel unit provided by the utility model can have different liquid storage units of the same or different volumes, connected in series or in parallel, and the opening and closing of the liquid storage units are controlled by setting electromagnetic valves. The unit is also equipped with a controller for controlling the opening and closing of the electromagnetic valves, thereby realizing intelligent control of the system. The opening and closing of each liquid storage unit can be controlled according to the startup and operation conditions of the equipment, reducing the operating cost and further enhancing the control performance and stability of the system.

[0024] 3. The low-cost vortex parallel unit provided by the utility model adopts multiple jet reheat compressors connected in parallel, which are connected to the suction main pipe, the jet main pipe and the exhaust main pipe through branch pipes. This design can improve the efficiency and working stability of the system. The connection method between the condenser, evaporator, economizer and other components has also been carefully designed, making the entire system run more smoothly and efficiently, and multiple sets of jet reheat compressors in parallel use a set of economizer components. Compared with the original set of economizer components used by each unit, the cost is reduced by about 50% to 66%, and the operation and control are simple.

[0025] In general, this low-cost scroll parallel unit is not only innovative and flexible in design, but also can provide efficient and stable cooling effect in actual operation. Its intelligent control system and multiple safety devices make the unit more reliable and controllable, able to meet the cooling needs in different scenarios, and has broad application prospects and market potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work. In the accompanying drawings:

[0027] Figure 1 It is a schematic diagram of the low-cost vortex parallel unit of the utility model.

[0028] In the figure: 1. compressor unit; 101. jet reheat compressor; 1011. exhaust port; 1012. air intake port; 1013. jet port; 2. condenser; 3. evaporator; 4. economizer; 5. liquid taking solenoid valve; 6. electronic expansion valve; 7. jet solenoid valve; 8. jet inlet temperature sensor; 9. jet outlet temperature sensor; 10. oil separator; 11. liquid storage tank; 1101. liquid storage unit; 12. sight glass; 13. exhaust temperature sensor; 14. gas-liquid separator; 15. filter; 16. fan; 100. exhaust main pipe; 200. air intake main pipe; 300. jet main pipe; 400. liquid outlet branch; 500. liquid taking branch; 600. liquid supply branch.

[0029] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "plurality" means two or more, unless otherwise clearly and specifically defined.

[0034] [Example 1]

[0035] The accumulator 11 is an important component of the compressor, which plays the role of storage, gas-liquid separation, filtration, silencing and refrigerant buffering. The refrigerant coming out of the condenser 2 will have liquid refrigerant entering the accumulator 11, and then the liquid refrigerant enters the economizer 4 or the evaporator 3. The function of the accumulator 11 is to effectively dissipate heat from the condenser 2. If there is no accumulator 11, a small part of the condenser 2 will be used as the accumulator 11, and the occupied part will have no heat dissipation effect; when the refrigeration load is small, the flow rate of the refrigeration system is reduced, and the accumulator 11 can store excess refrigerant to avoid excessive high pressure in the system. In traditional scroll parallel units, the compressor is fixed on a horizontal accumulator 11 with a volume greater than 30L. This accumulator 11 is a pressure vessel that needs to be registered, and a safety valve must be installed and calibrated regularly.

[0036] In order to reduce the cost of the vortex parallel unit, such as Figure 1As shown, the utility model provides a low-cost scroll parallel unit, which mainly includes a compressor unit 1, a condenser 2, an evaporator 3, an economizer 4, and a liquid reservoir 11. The liquid reservoir 11 includes a plurality of interconnected liquid storage units 1101 with a volume less than a set value.

[0037] Among them, the set value is preferably 30L, and two or more liquid storage units 1101 can be selected to match different working conditions according to actual conditions.

[0038] The utility model divides the liquid storage tank 11 into a plurality of liquid storage units 1101 with a volume smaller than a set value. Since the volume of each liquid storage unit 1101 is smaller than the set value, especially smaller than the filing threshold of 30L, filing is exempted, which can reduce the cost of design, production, filing, maintenance, etc., and effectively reduce costs.

[0039] In a preferred embodiment, the volumes of the plurality of liquid storage units 1101 are the same or different, so that a modular combination can be performed by setting liquid storage units 1101 of different specifications to achieve various total volumes. Liquid storage devices 11 of more specifications can be obtained without using more production equipment, thereby greatly reducing production costs, facilitating production and increasing user selectivity.

[0040] Furthermore, the arrangement of multiple liquid storage units 1101 makes the shape of the liquid reservoir 11 more flexible. During construction, multiple relatively small liquid storage units 1101 can pass through smaller doors, and space can be reasonably utilized through proper placement to reduce space waste.

[0041] Furthermore, multiple liquid storage units 1101 are connected in series or in parallel. Especially when the liquid storage units 1101 are connected in parallel, one or more liquid storage units 1101 can be flexibly selected to be turned on according to the operating conditions of the unit by setting switches, so that the operating efficiency of the unit is higher and energy saving effect is achieved.

[0042] In a preferred embodiment, the liquid storage units 1101 are connected in parallel with each other, and the inlet and / or outlet of each liquid storage unit 1101 is provided with a solenoid valve for controlling the opening and closing of the liquid storage unit 1101. In this way, the opening and closing of each liquid storage unit 1101 can be controlled according to the startup status and operation status of the equipment, thereby reducing the operating cost and further enhancing the control performance and stability of the system.

[0043] Furthermore, the liquid storage units 1101 are connected in parallel to increase the safety redundancy of the unit. For example, when a liquid storage unit 1101 fails, the solenoid valve corresponding to the liquid storage unit 1101 can be closed, and the unit can be operated using the normally functioning liquid storage unit 1101, thereby improving the operating stability of the entire unit and facilitating the individual repair of the failed unit.

[0044] In a preferred embodiment, a controller is provided in the unit to control the opening and closing of the solenoid valve and thus control the opening and closing of each liquid storage unit 1101, thereby reducing manual control and improving the convenience and automation of the unit. More preferably, a detection module may be provided near each liquid storage unit 1101, and if an operating failure such as blockage or abnormal pressure is detected in the liquid storage unit 1101, the controller automatically closes the liquid storage unit 1101 and issues a fault prompt to the user.

[0045] [Example 2]

[0046] On the basis of the above-mentioned embodiments, this embodiment provides a specific principle and structure of a low-cost vortex parallel unit.

[0047] Specifically, the compressor unit 1 includes a plurality of jet reheat compressors 101 connected in parallel, the suction port 1012, the jet port 1013 and the exhaust port 1011 of each jet reheat compressor 101 are respectively connected to the first ends of the suction main pipe 200, the jet main pipe 300 and the exhaust main pipe 100 through branch pipes, the inlet of the condenser 2 is connected to the second end of the exhaust main pipe 100, the outlet is connected to the main inlet of the economizer 4 through the liquid supply branch 600, the liquid storage tank 11 is arranged on the liquid supply branch 600, the inlet of the evaporator 3 is connected to the main outlet of the economizer 4 through the liquid outlet branch 400, the outlet is connected to the second end of the suction main pipe 200, the auxiliary inlet of the economizer 4 is connected to the liquid outlet branch 400 through the liquid intake branch 500, and the auxiliary outlet is connected to the second end of the jet main pipe 300.

[0048] Furthermore, the liquid intake branch 500 is provided with a liquid intake solenoid valve 5 and an electronic expansion valve 6 , and a jet solenoid valve 7 is provided between the jet port 1013 of each jet reheat compressor 101 and the jet main pipe 300 .

[0049] Furthermore, the high-temperature, high-pressure refrigerant gas discharged from each jet reheat compressor 101 enters the condenser 2 through the exhaust main pipe 100, becomes a high-pressure liquid after heat exchange with the heat-carrying medium, and is divided into two paths after passing through the liquid storage tank 11, wherein the liquid refrigerant in the main path directly enters the economizer 4, and the liquid refrigerant in the auxiliary path first passes through the liquid extraction solenoid valve 5, and then passes through the electronic expansion valve 6 for throttling and pressure reduction, and then becomes a gas-liquid mixture, and then enters the economizer 4. The refrigerants in the main path and the auxiliary path produce heat exchange in the economizer 4, and the refrigerant liquid in the auxiliary path absorbs heat and becomes gas, which is then sucked into the jet port 1013 of the jet reheat compressor 101, which plays a role in cooling the compressor motor, and the refrigerant in the main path releases heat and becomes a supercooled liquid, which enters the evaporator 3 after throttling and pressure reduction by the expansion valve of the evaporator 3.

[0050] In the evaporator 3, the refrigerant in the main circuit absorbs heat from the low-temperature environment and becomes a low-pressure gas, which is then sucked into each jet reheat compressor 101 through the suction port 1012 after passing through the suction manifold 200. The refrigerants in the main circuit and the auxiliary circuit are mixed in the working chamber of the jet reheat compressor 101, and then further compressed and discharged.

[0051] In a preferred embodiment, a liquid intake solenoid valve 5 is provided in the liquid intake branch 500 to prevent the jet reheat compressor 101 from reversing at the moment of shutdown and liquid from entering the compressor, causing liquid compression; it can also reduce the clearance volume of the jet reheat compressor 101 and improve its volumetric efficiency.

[0052] In a preferred embodiment, a jet inlet temperature sensor is provided on the liquid intake branch 500, a jet outlet temperature sensor 9 is provided on the jet pipe of the economizer 4, and an exhaust temperature sensor 13 is provided on the exhaust main pipe 100. The electronic expansion valve 6 adjusts the opening according to the superheat of the jet inlet temperature sensor 8 and the jet outlet temperature sensor 9 of the economizer 4. When the system detects that the exhaust temperature exceeds the standard, the electronic expansion valve 6 will no longer be adjusted according to the superheat, but will be fully opened to spray liquid to cool the motor of the jet enthalpy increase compressor 101 until the exhaust temperature meets the requirements, and then control is performed according to the superheat.

[0053] Furthermore, an oil separator 10 is provided between the exhaust main pipe 100 and the condenser 2 to separate the lubricating oil in the high-pressure gas discharged from the jet reheat compressor 101 to ensure safe and efficient operation of the device; a gas-liquid separator 14 is provided between the intake main pipe 200 and the evaporator 3 to separate the flash gas generated after throttling to prevent it from entering the evaporator 3 and causing damage to the evaporator 3.

[0054] In a preferred embodiment, a sight glass 12 is provided on the liquid outlet branch 400 for observing the condition of the heat carrier medium and the water content in the heat carrier medium.

[0055] The working principle of the low-cost vortex parallel unit in this embodiment is as follows:

[0056] When the unit is started, the jet solenoid valve 7 opens synchronously with the corresponding jet reheat compressor 101, the liquid extraction solenoid valve 5 opens, and the electronic expansion valve 6 adjusts its opening according to the superheat of the jet inlet temperature sensor 8 and the jet outlet temperature sensor 9 of the economizer 4.

[0057] When the jet reheat compressor 101 is shut down for capacity adjustment, the corresponding jet solenoid valve 7 is closed, and the jet solenoid valve 7 corresponding to the jet reheat compressor 101 that is not shut down remains open.

[0058] When the exhaust temperature sensor 13 detects that the exhaust temperature is out of range, the electronic expansion valve 6 is fully opened to cool the jet reheat compressor 101. When the exhaust temperature sensor 13 detects that the exhaust temperature reaches a reasonable range, the electronic expansion valve 6 performs normal superheat control.

[0059] When the unit reaches the set temperature and all the jet heat increasing compressors 101 are stopped or shut down, the jet solenoid valve 7 and the liquid taking solenoid valve 5 are closed.

[0060] In general, the low-cost scroll parallel unit provided by the utility model is not only innovative and flexible in design, but also can provide efficient and stable refrigeration effect in actual operation. Its intelligent control system and multiple safety devices make the unit more reliable and controllable, can meet the refrigeration needs in different scenarios, and has broad application prospects and market potential.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0062] The above is only a preferred embodiment of the present invention, and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the present invention.

Claims

1. A low-cost scroll parallel unit, comprising a compressor unit (1), a condenser (2), an evaporator (3), an economizer (4), and a liquid storage device (11), characterized in that: The liquid storage device (11) comprises a plurality of interconnected liquid storage units (1101) each having a volume smaller than a set value.

2. The low-cost vortex parallel unit according to claim 1, characterized in that: The volumes of the liquid storage units (1101) are the same or different.

3. The low-cost vortex parallel unit according to claim 1 or 2, characterized in that: The liquid storage units (1101) are connected in series or in parallel.

4. The low-cost vortex parallel unit according to claim 3, characterized in that: The liquid storage units (1101) are connected in parallel with each other, and the inlet and / or outlet of each liquid storage unit is provided with a solenoid valve for controlling the opening and closing of the liquid storage unit (1101).

5. The low-cost vortex parallel unit according to claim 4, characterized in that: Also includes: A controller is used to control the opening and closing of the solenoid valve.

6. The low-cost vortex parallel unit according to claim 1, characterized in that: The compressor unit comprises a plurality of jet reheat compressors (101) connected in parallel with each other, wherein the air intake (1012), the air jet (1013) and the air discharge (1011) of each jet reheat compressor (101) are respectively connected to the first end of the air intake main pipe (200), the air jet main pipe (300) and the air discharge main pipe (100) through branch pipes; The inlet of the condenser (2) is connected to the second end of the exhaust main pipe (100), and the outlet is connected to the main inlet of the economizer (4) via a liquid supply branch (600), and the liquid storage device (11) is arranged on the liquid supply branch (600); The inlet of the evaporator (3) is connected to the main outlet of the economizer (4) via a liquid outlet branch (400), and the outlet is connected to the second end of the air intake main pipe (200); The auxiliary road inlet of the economizer (4) is connected to the liquid outlet branch (400) via a liquid intake branch (500), and the auxiliary road outlet is connected to the second end of the jet main pipe (300).

7. The low-cost vortex parallel unit according to claim 6, characterized in that: The liquid intake branch (500) is provided with a liquid intake solenoid valve (5) and an electronic expansion valve (6), and a jet solenoid valve (7) is provided between the jet port (1013) of each jet enthalpy increase compressor (101) and the jet main pipe (300).

8. The low-cost vortex parallel unit according to claim 6, characterized in that: The liquid intake branch (500) is provided with an air jet inlet temperature sensor (8), the air jet pipe of the economizer (4) is provided with an air jet outlet temperature sensor (9), and the exhaust main pipe (100) is provided with an exhaust gas temperature sensor (13).

9. The low-cost vortex parallel unit according to claim 6, characterized in that: An oil separator (10) is provided between the exhaust manifold (100) and the condenser (2).

10. The low-cost vortex parallel unit according to claim 6, characterized in that: A gas-liquid separator (14) is provided between the air intake main pipe (200) and the evaporator (3).

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