阅读说明：本技术 一种高效泵组系统 (High-efficient pump package system ) 是由 施勇 董雪峰 程涛 于 2021-09-14 设计创作，主要内容包括：本发明提供的高效泵组系统由泵组的每一泵(11、12、13、14)的流量根据工况需求的流量按照特定方式配置,且所述中央单元采用特定的工作程序选择所述泵(11、12、13、14)的组合工作方式,即,不同的工况流量选择对应的配泵模式,从而使得所述泵组总是工作在各泵的高效区(80％-120％Q)的范围内,达到循环水泵机组的节能效果。(The high-efficiency pump set system provided by the invention is characterized in that the flow of each pump (11, 12, 13, 14) of the pump set is configured according to the flow required by working conditions in a specific mode, and the central unit selects the combined working mode of the pumps (11, 12, 13, 14) by adopting a specific working program, namely, the corresponding pump distribution mode is selected according to the flow of different working conditions, so that the pump set always works in the range of the high-efficiency area (80-120% Q) of each pump, and the energy-saving effect of a circulating water pump set is achieved.)

1. A high efficiency pump package system, comprising:

a first detection unit (31) connected to the central air conditioning unit (10), said detection unit being intended to detect the instantaneous flow demand Qi of said central air conditioning unit (10);

a pump group connected with the power device, the pump group comprises a first pump (11) with rated flow rate Q1, a second pump (12) with rated flow rate Q2, a third pump (13) with rated flow rate Q3 and a fourth pump (14) with rated flow rate Q4, wherein each pump is connected in parallel, and an output pipeline (111) of the first pump (11), an output pipeline (121) of the second pump (12), an output pipeline (131) of the third pump (13) and an output pipeline (141) of the first pump (14) are connected with a total pipeline (101) which is connected with a central air conditioning unit (10) with working condition flow rate ranging from Qn to Qm, wherein the rated flow rate of each pump is selected as follows:

Q1<Q2<Q3<Q4；

1.8Q1<Q3<2.2Q1；

0.8Qn<Q1<1.2Qn；

0.8Qm<Q2+Q3+Q4<1.2Qm,

and

a central control unit (30), said central control unit (30) being connected to said detection unit (31) and to a first pump (11), a second pump (12), a third pump (13) and a fourth pump (14) of said pump group, respectively, and operating according to said demanded flow Qi detected by said detection unit (31) in the following manner:

。

2. a high efficiency pump group system according to claim 1, characterized in that a second unit (32) is provided in the main line (101) for detecting the fluid pressure P1 in the main line (101), and the detected signal of the pressure P1 is inputted to the central processing unit (30).

3. A high efficiency pump package system as set forth in claim 1 wherein Q2 is 1.5Q 1.

4. A high efficiency pump package system as set forth in claim 1 wherein Q3 is 2.0Q 1.

5. A high efficiency pump package system as set forth in claim 1 wherein Q4 is 3.0Q 1.

6. An efficient pump group system according to claim 1, characterized in that the central processing unit (30) employs a Program Logic Controller (PLC).

7. A high efficiency pump group system according to claim 1, characterized in that the first detection unit (31) uses an electromagnetic flow meter.

8. A high efficiency pump group system according to claim 1, characterized in that the second detection unit (32) employs a pressure sensor.

9. A high efficiency pump group system according to claim 1, characterized in that the central processing unit (30) controls the operation of the motor of each pump (11, 12, 13, 14) of the pump group by means of an actuator (21, 22, 23, 24). A first support layer (1039) having increased strength is provided on the connection end (103).

10. A high efficiency pump package system as set forth in claim 1 wherein said actuator is a backpack transducer.

11. A high efficiency pump group system according to claim 1, characterized in that each pump (11, 12, 13, 14) of the pump group is provided with a backpack frequency converter.

Technical Field

The present invention relates to a cooling water circulation system, and more particularly, to a system capable of circulating a pump unit.

Background

Need be equipped with water circulating system in warm logical system, in order to adapt to the warm logical system to the requirement of high-efficient transport medium, the water circulating system scheme on the existing market mainly adopts the technical scheme of traditional pump + variable frequency control cabinet + traditional wafer formula check valve + Y type filter + butterfly valve, but current unit operating efficiency is low, and it is great to adopt this kind of traditional wafer formula check valve + Y type filter + butterfly valve hydraulic loss, and the inclined to one side operating mode is serious during the field usage, leads to the operating efficiency low. In refrigeration or various air conditioning systems, a large amount of fluid input and output is required, so the working efficiency of the pump directly affects the energy saving efficiency of the whole refrigeration system.

To provide for the operating efficiency of the pumping system, chinese patent application publication No. CN101389866A discloses an industrial process efficiency method and system, and in particular, to a method and system for improving the efficiency and performance of any industrial process when the load is handling the maximum capacity or when the maximum capacity is less than. The system incorporates a plurality of motor driven pumps of the same or similar capacity to move liquid, slurry, gas and other fluids or fluid-like materials at or near equal reduced speeds or similar reduced speeds in place of the less efficient pumping arrangements of the original/conventional design, thereby providing the optimum or same flow capacity relative to the operating flow capacity of the original pumping arrangement. According to the method and system of the present invention, substantial energy savings can be realized. Furthermore, the method and system may act in response to the load signal or some other reference from which the load may be inferred, whereby a greater degree of energy savings may be achieved accordingly. The present invention is directed to methods and systems for improving the overall operational performance and movement of fluids in, for example, HVAC systems, paper processing, water and/or sewage treatment plants, or any other system that incorporates fluid pumping.

However, the ability and method of the above-described system does not guarantee that the pump will operate efficiently over a wide range of application conditions (requirements).

Although a pump group working system for providing fluid input by adopting a plurality of pumps to work in parallel is also available, the working condition requirement of large flow is mainly met, but how to improve the working efficiency of the pump group by selecting the high-efficiency area range and high-efficiency matching of the pumps working in the pump group is not considered, so that the purpose of energy conservation is achieved, and the problem which needs to be solved urgently is solved.

Disclosure of Invention

The invention aims to provide an efficient pump set system which can be used under the working condition requirement of a central air-conditioning system in a wide flow range so as to ensure the efficient operation of the system.

In order to achieve the above object of the present invention, there is provided a high efficiency pump set system including:

a first detection unit (31) connected to the central air conditioning unit (10), said detection unit being intended to detect the instantaneous flow demand Qi of said central air conditioning unit (10);

a pump group connected with the power device, the pump group comprises a first pump (11) with rated flow rate Q1, a second pump (12) with rated flow rate Q2, a third pump (13) with rated flow rate Q3 and a fourth pump (14) with rated flow rate Q4, wherein each pump is connected in parallel, and an output pipeline (111) of the first pump (11), an output pipeline (121) of the second pump (12), an output pipeline (131) of the third pump (13) and an output pipeline (141) of the first pump (14) are connected with a total pipeline (101) which is connected with a central air conditioning unit (10) with working condition flow rate ranging from Qn to Qm, wherein the rated flow rate of each pump is selected as follows:

Q1<Q2<Q3<Q4；

1.8Q1<Q3<2.2Q1；

0.8Qn<Q1<1.2Qn；

0.8Qm<Q2+Q3+Q4<1.2Qm,

and

a central control unit (30), said central control unit (30) being connected to said detection unit (31) and to a first pump (11), a second pump (12), a third pump (13) and a fourth pump (14) of said pump group, respectively, and operating according to said demanded flow Qi detected by said detection unit (31) in the following manner:

further, a second unit (32) is provided on the main pipe (101) for detecting a fluid pressure P1 in the main pipe (101), and a signal of the detected pressure P1 is inputted to the central processing unit (30).

Further, Q2 ═ 1.5Q 1;

further, Q3 ═ 2.0Q 1;

further, Q4-3.0Q 1

Further, the central processing unit (30) employs a Program Logic Controller (PLC).

Further, the first detection unit (31) adopts an electromagnetic flow meter.

Further, the second detection unit (31) employs a pressure sensor.

Further, the central processing unit (30) controls the operation of the motor of each pump (11, 12, 13, 14) of the pump group by means of an actuator (21, 22, 23, 24). A first support layer (1039) having increased strength is provided on the connection end (103).

Further, the actuating mechanism adopts a backpack type frequency converter.

Furthermore, each pump (11, 12, 13, 14) of the pump group is provided with a backpack frequency converter.

According to the efficient pump set system provided by the invention, the flow of each pump (11, 12, 13, 14) of the pump set is configured according to the flow required by working conditions in a specific mode, and the central unit selects the combined working mode of the pumps (11, 12, 13, 14) by adopting a specific working program, namely the number and/or the combined mode of the pumps are selected according to the flow of different working conditions, so that the pump set always works in the range of an efficient area (80% -120% Q) of each pump, and the energy-saving effect of a central air conditioning unit is achieved.

Drawings

Figure 1 is a schematic diagram of the efficient operation of the pump unit according to the invention.

Fig. 2 is a block diagram of a high-efficiency pump group system provided by the present invention.

Fig. 3 is an electrical control diagram of an example of an efficient pump group system provided by the present invention.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, the principle of efficient matching of a water pump of an efficient pump set system provided by the invention is as follows: according to the flowmeter of the first detection unit 31 arranged on the water outlet main pipe of the central air-conditioning unit, the required flow Qi (circulating water supply flow) of the central air-conditioning unit can be detected in real time. By setting the rated flow and the high-efficiency area range (0.8-1.2) of each water pump, the central processing unit 30 can realize automatic high-efficiency matching of the water pumps according to different required flows Qi, so that each water pump or combination (seven pump combined operation modes of the following tables 1 and 2) which is scheduled to operate can operate in the high-efficiency area (the rated flow is 0.8-1.2) in the flow section of the whole required flow Qi.

Referring to fig. 2, the high efficiency pump set system provided by the present invention includes a first detection unit (31), a pump set (100), a central control unit (30), a second detection unit (31), and a central processing unit (30). A second unit (32) is provided on the main line (101) for detecting a fluid pressure P1 in the main line (101), and a signal of the detected pressure P1 is inputted to the central processing unit (30). The unit has the control function of constant pressure difference (constant pressure difference of a water distributor and a water collector), and can automatically control the number and the rotating speed of the water pumps according to the actual cold water load of the system, thereby ensuring the most unfavorable cold water requirement of the system. When the cold water load is reduced, the differential pressure value is increased and is higher than the set target differential pressure, and the unit is decelerated; when the cold water load is increased, the differential pressure value is reduced, and when the differential pressure value is lower than the set target differential pressure, the unit is accelerated. The system carries out combination optimization on the water pump according to the detected real-time flow, and further realizes efficient matching of the pump set. FIG. 3 is an electrical control diagram of a specific embodiment.

A first detection unit (31) is connected to the central air conditioning unit 10, said first detection unit (31) being adapted to detect an instantaneous flow demand Qi of said central air conditioning unit 10. The pump group (100) comprises a first pump (11) with rated flow rate Q1, a second pump (12) with rated flow rate Q2, a third pump (13) with rated flow rate Q3 and a fourth pump (14) with rated flow rate Q4, wherein each pump is connected in parallel, and an output pipeline (111) of the first pump (11), an output pipeline (121) of the second pump (12), an output pipeline (131) of the third pump (13) and an output pipeline (141) of the first pump (14) are connected with a total pipeline (101) which is connected with a central air conditioning unit (10) with working condition flow rate ranging from Qn to Qm, wherein the rated flow rate of each pump (11, 12, 13, 14) is selected as follows:

Q1<Q2<Q3<Q4；

1.8Q1<Q3<2.2Q1；

0.8Qn<Q1<1.2Qn；

0.8Qm<Q2+Q3+Q4<1.2Qm,

the central control unit (30) is connected to the first detection unit (31) and the first pump (11), the second pump (12), the third pump (13) and the fourth pump (14) of the pump set, respectively, and operates according to the required flow Qi detected by the first detection unit (31) in the following manner as shown in table 1:

TABLE 1

In the present embodiment, Q2 ═ 1.5Q 1; q3 ═ 2.0Q 1; q4 ═ 3.0Q 1. The central processing unit (30) employs a Program Logic Controller (PLC). The first detection unit (31) adopts an electromagnetic flowmeter. The second detection unit (31) employs a pressure sensor. The central processing unit (30) controls the operation of the motor of each pump (11, 12, 13, 14) of the pump group by means of an actuator (21, 22, 23, 24) which uses a backpack-type frequency converter to control the opening and closing operation of each pump (11, 12, 13, 14). Each pump (11, 12, 13, 14) of the pump group is provided with a backpack frequency converter.

In table 1, there are multiple pump allocation combinations for the same flow rate, the cpu 30 may prioritize the flow rate according to the lowest energy consumption principle, and after the priority (1, 2, 3 … … 14) is determined, the flow rate Qi is compared one by one according to the actual demand flow rate and the priority, and the appropriate pump allocation combination in table 1 is selected, so that the unit may operate efficiently. Of course, once the water pump of the preferred pump combination fails, the system will automatically switch to the next best pump.

Example 1

In order to facilitate the understanding of the invention, the pump unit according to the invention is described below by way of a specific example.

In this embodiment, the demanded flow Qn of the central air conditioning unit 10 is 100m3/h, and Qm is 780m 3/h. Thus, the nominal flow rates of the 4 pumps selected were:

the first pump 11 (pump 1) was 100m3/h, the second pump 12 (pump 2) was 150m3/h, the third pump 13 (pump 3) was 200m3/h, and the fourth pump 14 (pump 1) was 300m 3/h. The high-efficiency range of each pump is adjusted to 80-120% of the rated flow through a variable frequency motor. Thus, according to the above-described operating program mode of Table 1, the following efficient matching of Table 2 can be obtained:

TABLE 2

Thus, the operation of the cpu 30 is as follows:

TABLE 3

According to the efficient pump set system, the flow of each pump (11, 12, 13, 14) of the pump set is configured according to the flow required by working conditions in a specific mode, and the central unit selects the combined working mode of the pumps (11, 12, 13, 14) by adopting a specific working program, namely the number of the pumps and/or the combined mode are selected according to the flow of different working conditions, so that the pump set always works in the range of an efficient area (80% -120% Q) of each pump, and the energy-saving effect is achieved.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.