阅读说明：本技术 一种多能源互补的园区冷热联供装置及其控制系统 (Multi-energy complementary cold and heat combined supply device for park and control system thereof ) 是由 戴媛媛 田建艳 龙志强 张驰 冯锋 周峰 刘春升 卫忠华 张缠保 吕玉祥 于 2021-10-12 设计创作，主要内容包括：本发明涉及一种多能源互补的园区冷热联供装置及其控制系统,属于能源供给技术领域,解决了工业园区的仅用空气源热泵冷暖联耗电量大,大功率设备导致园区电压偏低、甚至影响园区各类设备的使用寿命,仅使用太阳能供暖技术有时无法满足供暖需求等技术问题。解决方案为：一种多能源互补的园区冷热联供装置,包括太阳能集热系统、空气源热泵机组、水源热泵机组、集热水箱和恒温水箱,通过和园区冷热用户端的连接形成七个回路,七个回路形成冬季供暖的四个模式和夏季制冷的两个模式。本发明利用太阳能、空气能等绿色能源对园区进行能源(暖、冷)供给,同时通过控制系统对其进行控制,最终实现能源安全、清洁、高效、低碳利用,全面提升能源品质。(The invention relates to a multi-energy complementary district cooling and heating combined supply device and a control system thereof, belongs to the technical field of energy supply, and solves the technical problems that the power consumption of an industrial park is large only by using an air source heat pump cooling and heating combined supply device, the park voltage is low due to high-power equipment, the service life of various equipment in the park is even influenced, and the heating requirement can not be met sometimes only by using a solar heating technology. The solution is as follows: the utility model provides a complementary cold and hot confession device of garden of multipotency source, includes solar energy collection system, air source heat pump set, water source heat pump set, hot water collecting tank and thermostatic water tank, forms seven return circuits through being connected with the cold and hot user side in garden, and seven return circuits form four modes of heating in winter and two modes of refrigeration in summer. According to the invention, green energy such as solar energy, air energy and the like is utilized to supply energy (warm energy and cold energy) to the park, and the park is controlled by the control system, so that safe, clean, efficient and low-carbon utilization of the energy is finally realized, and the energy quality is comprehensively improved.)

1. a complementary district of multipotency source is cold and hot to ally oneself with confession device which characterized in that includes: the system comprises a solar heat collecting system (1), an air source heat pump unit (2), a water source heat pump unit (3), a heat collecting water tank (4) and a constant temperature water tank (5);

the solar heat collection system (1) and the constant-temperature water tank (5) are connected through a first water inlet pipe (6-1) and a first water outlet pipe (6-2) to form a first loop, two ends of the first water inlet pipe (6-1) are respectively connected with a water outlet end of the solar heat collection system (1) and a water inlet end of the constant-temperature water tank (5), and two ends of the first water outlet pipe (6-2) are respectively connected with a water inlet end of the solar heat collection system (1) and a water outlet end of the constant-temperature water tank (5);

the solar heat collection system (1) and the heat collection water tank (4) are connected through a second water inlet pipe (6-3) and a second water outlet pipe (6-4) to form a second loop, two ends of the second water inlet pipe (6-3) are respectively connected with a water outlet end of the solar heat collection system (1) and a water inlet end of the heat collection water tank (4), two ends of the second water outlet pipe (6-4) are respectively connected with a water inlet end of the solar heat collection system (1) and a water outlet end of the heat collection water tank (4);

the air source heat pump unit (2) and the constant temperature water tank (5) are connected through a third water inlet pipe (6-5) and a third water outlet pipe (6-6) to form a third loop, two ends of the third water inlet pipe (6-5) are respectively connected with a water outlet end of the air source heat pump unit (2) and a water inlet end of the constant temperature water tank (5), two ends of the third water outlet pipe (6-6) are respectively connected with a water inlet end of the air source heat pump unit (2) and a water outlet end of the constant temperature water tank (5);

the air source heat pump unit (2) and the heat collection water tank (4) are connected through a fourth water inlet pipe (6-7) and a fourth water outlet pipe (6-8) to form a fourth loop, two ends of the fourth water inlet pipe (6-7) are respectively connected with a water outlet end of the air source heat pump unit (2) and a water inlet end of the heat collection water tank (4), two ends of the fourth water outlet pipe (6-8) are respectively connected with a water inlet end of the air source heat pump unit (2) and a water outlet end of the heat collection water tank (4);

the water source heat pump unit (3) and the constant temperature water tank (5) are connected through a fifth water inlet pipe (6-9) and a fifth water outlet pipe (6-10) to form a fifth loop, two ends of the fifth water inlet pipe (6-9) are respectively connected with a water outlet end of the water source heat pump unit (3) and a water inlet end of the constant temperature water tank (5), two ends of the fifth water outlet pipe (6-10) are respectively connected with a water inlet end of the water source heat pump unit (3) and a water outlet end of the constant temperature water tank (5);

the water source heat pump unit (3) and the heat collection water tank (4) are connected through a sixth water inlet pipe (6-11) and a sixth water outlet pipe (6-12) to form a sixth loop, two ends of the sixth water inlet pipe (6-11) are respectively connected with the water outlet end of the water source heat pump unit (3) and the water inlet end of the heat collection water tank (4), and two ends of the sixth water outlet pipe (6-12) are respectively connected with the water inlet end of the water source heat pump unit (3) and the water outlet end of the heat collection water tank (4);

the constant-temperature water tank (5) and the cold and hot user side of the park are connected through a seventh water inlet pipe (6-13) and a seventh water outlet pipe (6-14) to form a seventh loop, two ends of the seventh water inlet pipe (6-13) are respectively connected with a water outlet end of the constant-temperature water tank (5) and a water inlet end of the cold and hot user side of the park (7), and two ends of the seventh water outlet pipe (6-14) are respectively connected with a water inlet end of the constant-temperature water tank (5) and a water outlet end of the cold and hot user side of the park (7).

2. The combined cooling and heating installation for a complementary campus of claim 1, further comprising: the solar heat collection system (1) comprises a plurality of groups of heat collection modules connected in parallel, and the heat collection modules are formed by connecting four groups of heat collection plates (1-1) in series.

3. The combined cooling and heating installation for a complementary campus of claim 1, further comprising: the air source heat pump units (2) are connected in parallel by a plurality of groups of air source heat pumps.

4. The combined cooling and heating installation for a complementary campus of claim 1, further comprising: and the first water outlet pipe (6-2), the second water outlet pipe (6-4), the third water outlet pipe (6-6), the fifth water outlet pipe (6-10), the sixth water inlet pipe (6-11), the sixth water outlet pipe (6-12) and the seventh water inlet pipe (6-13) are all provided with a water circulating pump (8).

5. The combined cooling and heating installation for a complementary campus of claim 4, further comprising: the seventh water inlet pipe (6-13) is provided with an adjusting valve (9); the first water inlet pipe (6-1), the first water outlet pipe (6-2), the second water inlet pipe (6-3), the second water outlet pipe (6-4), the third water inlet pipe (6-5), the third water outlet pipe (6-6), the fourth water inlet pipe (6-7) and the fourth water outlet pipe (6-8) are all provided with electric ball valves (10).

6. The combined cooling and heating installation for a complementary campus of claim 5, further comprising: the cold and hot combined supply device further comprises a water treatment silicon crystal tank (11), and the water treatment silicon crystal tank (11) is connected with the heat collection water tank (4) and the constant temperature water tank (5) through connecting water pipes (12) respectively.

7. The combined cooling and heating installation for a complementary campus of claim 6, further comprising: and valves (13) are arranged on the water inlet end and the water outlet end of the solar heat collection system (1), the water inlet end and the water outlet end of the water circulating pump (8), the water inlet end and the water outlet end of the water treatment silicon crystal tank (11) and the connecting water pipe (12).

8. The control system of a multi-energy complementary district combined heat and cold supply device according to claim 1, wherein: the system comprises a PLC control module, a temperature acquisition module, a flow acquisition module, an execution module and an upper computer control system;

the temperature acquisition module comprises a solar heat collection system temperature sensor, an air source heat pump unit water outlet temperature sensor, a heat collection water tank temperature sensor, a constant temperature water tank temperature sensor and a park cold and hot user side water supply and return temperature sensor, the signal output end of the temperature acquisition module is respectively connected with the signal input end of the PLC control module, and the temperature acquisition module transmits acquired temperature information to the PLC control module for data processing;

the flow acquisition module comprises a plurality of groups of flow sensors arranged on each pipeline, the signal output end of the flow acquisition module is connected with the signal input end of the PLC control module, and the flow acquisition module transmits the acquired water flow information in each pipeline to the PLC control module for data processing;

the execution module comprises a water circulating pump (8), an electric ball valve (10) and a regulating valve (9), the input end of the execution module is connected with the signal output end of the PLC control module, the PLC control module collects the switching information of the execution module, and the execution module receives the execution signal sent by the PLC control module and carries out starting, stopping and switching instructions;

and the PLC control module is electrically connected with the upper computer control system.

Technical Field

The invention belongs to the technical field of energy supply, and particularly relates to a multi-energy complementary district cold and hot combined supply device and a control system thereof.

Background

Energy is an important pillar for social and economic development progress, and the problems of environmental pollution and unbalanced energy supply and demand are continuously aggravated while the energy demand is increased day by day. At present, the state of energy management of a park mainly reflects that the traditional energy is the main energy, the clean energy is low in proportion, the energy consumption is large, and the environmental pressure is large. The strategy for solving the current situation is to optimize the energy structure, improve the proportion of clean energy, realize comprehensive energy supervision and control, and efficiently and accurately regulate and control energy in real time. Therefore, the application of a wider clean energy consumption mode, a more efficient energy comprehensive utilization method and a more optimized energy system regulation and control means is more urgent.

Solar heating technology is developing rapidly, and this technique can effectively realize that the energy is low carbon nature for the garden, and when solar radiation intensity is high, solar energy can provide the heat source that satisfies the temperature requirement for the user, however when solar radiation intensity is low and night, then can't provide sufficient heat energy for the user. The air source heat pump cooling and heating combined supply system gradually becomes an important mode for comfortable heating in winter and cooling in summer in south in recent years, has the outstanding technical characteristics of energy conservation and comfort, but for an industrial park, excessive high-power electric appliances are added in a power utilization peak time period, high-price electricity is required to be used, the voltage is low, and the service life of various equipment in the park is even influenced.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a park cold and hot combined supply device with complementary multiple energy sources and a control system thereof, and solves the technical problems of insufficient output power in rainy days and nights for solar heating, large power consumption and influence on stable power consumption in air source heat pump cold and hot combined supply, and the like.

In order to solve the problems, the technical scheme of the invention is as follows: a multi-energy complementary district combined cooling and heating supply device, wherein: the method comprises the following steps: the system comprises a solar heat collecting system, an air source heat pump unit, a water source heat pump unit, a heat collecting water tank and a constant temperature water tank;

the solar energy heat collection system is connected with the constant temperature water tank through a first water inlet pipe and a first water outlet pipe to form a first loop, two ends of the first water inlet pipe are respectively connected with a water outlet end of the solar energy heat collection system and a water inlet end of the constant temperature water tank, and two ends of the first water outlet pipe are respectively connected with a water inlet end of the solar energy heat collection system and a water outlet end of the constant temperature water tank;

the solar heat collection system and the heat collection water tank are connected through a second water inlet pipe and a second water outlet pipe to form a second loop, two ends of the second water inlet pipe are respectively connected with a water outlet end of the solar heat collection system and a water inlet end of the heat collection water tank, and two ends of the second water outlet pipe are respectively connected with a water inlet end of the solar heat collection system and a water outlet end of the heat collection water tank;

the air source heat pump unit and the constant temperature water tank are connected through a third water inlet pipe and a third water outlet pipe to form a third loop, two ends of the third water inlet pipe are respectively connected with a water outlet end of the air source heat pump unit and a water inlet end of the constant temperature water tank, and two ends of the third water outlet pipe are respectively connected with a water inlet end of the air source heat pump unit and a water outlet end of the constant temperature water tank;

the air source heat pump unit and the heat collection water tank are connected through a fourth water inlet pipe and a fourth water outlet pipe to form a fourth loop, two ends of the fourth water inlet pipe are respectively connected with a water outlet end of the air source heat pump unit and a water inlet end of the heat collection water tank, and two ends of the fourth water outlet pipe are respectively connected with a water inlet end of the air source heat pump unit and a water outlet end of the heat collection water tank;

the water source heat pump unit and the constant temperature water tank are connected through a fifth water inlet pipe and a fifth water outlet pipe to form a fifth loop, two ends of the fifth water inlet pipe are respectively connected with a water outlet end of the water source heat pump unit and a water inlet end of the constant temperature water tank, and two ends of the fifth water outlet pipe are respectively connected with a water inlet end of the water source heat pump unit and a water outlet end of the constant temperature water tank;

the water source heat pump unit and the heat collection water tank are connected through a sixth water inlet pipe and a sixth water outlet pipe to form a sixth loop, two ends of the sixth water inlet pipe are respectively connected with the water outlet end of the water source heat pump unit and the water inlet end of the heat collection water tank, and two ends of the sixth water outlet pipe are respectively connected with the water inlet end of the water source heat pump unit and the water outlet end of the heat collection water tank;

and the constant-temperature water tank and the cold and hot user end of the park are connected through a seventh water inlet pipe and a seventh water outlet pipe to form a seventh loop, two ends of the seventh water inlet pipe are respectively connected with the water outlet end of the constant-temperature water tank and the water inlet end of the cold and hot user end of the park, and two ends of the seventh water outlet pipe are respectively connected with the water inlet end of the constant-temperature water tank and the water outlet end of the cold and hot user end of the park.

Furthermore, the solar heat collection system comprises a plurality of groups of heat collection modules connected in parallel, and the heat collection modules are formed by connecting four groups of heat collection plates in series.

Further, the air source heat pump units are connected in parallel by a plurality of groups of air source heat pumps.

Furthermore, the first water outlet pipe, the second water outlet pipe, the third water outlet pipe, the fifth water outlet pipe, the sixth water inlet pipe, the sixth water outlet pipe and the seventh water inlet pipe are all provided with a water circulating pump.

Furthermore, a regulating valve is arranged on the seventh water inlet pipe; and the first water inlet pipe, the first water outlet pipe, the second water inlet pipe, the second water outlet pipe, the third water inlet pipe, the third water outlet pipe, the fourth water inlet pipe and the fourth water outlet pipe are all provided with electric ball valves.

Further, the cold and hot combined supply device further comprises a water treatment silicon crystal tank, and the water treatment silicon crystal tank is connected with the heat collection water tank and the constant temperature water tank through connecting water pipes respectively.

Furthermore, valves are arranged on the water inlet end and the water outlet end of the solar heat collecting system, the water inlet end and the water outlet end of the water circulating pump, the water inlet end and the water outlet end of the water treatment silicon crystal tank and the connecting water pipe.

A control system of a multi-energy complementary park combined cooling and heating device comprises a PLC control module, a temperature acquisition module, a flow acquisition module, an execution module and an upper computer control system;

the temperature acquisition module comprises a solar heat collection system temperature sensor, an air source heat pump unit water outlet temperature sensor, a heat collection water tank temperature sensor, a constant temperature water tank temperature sensor and a park cold and hot user side water supply and return temperature sensor, the signal output end of the temperature acquisition module is respectively connected with the signal input end of the PLC control module, and the temperature acquisition module transmits acquired temperature information to the PLC control module for data processing;

the flow acquisition module comprises a plurality of groups of flow sensors arranged on each pipeline, the signal output end of the flow acquisition module is connected with the signal input end of the PLC control module, and the flow acquisition module transmits the acquired water flow information in each pipeline to the PLC control module for data processing;

the execution module comprises a water circulating pump, an electric ball valve and an adjusting valve, the input end of the execution module is connected with the signal output end of the PLC control module, the PLC control module collects the switching information of the execution module, and the execution module receives the execution signal sent by the PLC control module and carries out starting, stopping and switching instructions;

and the PLC control module is electrically connected with the upper computer control system.

Compared with the prior art, the invention has the following working process and beneficial effects:

the invention adopts the connection among a solar heat collecting system, an air source heat pump unit, a water source heat pump unit, a heat collecting water tank, a constant temperature water tank and a cold and hot user end of a park to form seven loops, and the on-off of the seven loops realizes four modes of heating in winter and two modes of refrigerating in summer according to actual conditions:

heating in winter in one mode: when a temperature sensor of the solar heat collection system detects that the water outlet temperature of the solar heat collection system is higher than the set water inlet temperature of the garden heat user side, a signal is transmitted to a PLC control module, the PLC control module controls a water circulating pump, an adjusting valve and an electric ball valve on a first water inlet pipe, a first water outlet pipe and a seventh water inlet pipe to be opened, hot water in the solar heat collection system directly enters the constant-temperature water tank and then enters the garden heat user side for heating;

heating in winter in two modes: the combination of the second loop, the fifth loop, the sixth loop and the seventh loop is a winter heating mode, namely a solar heat collection system, a heat collection water tank, a water source heat pump, a constant temperature water tank and a park heat user side, when the solar irradiation intensity is low, a temperature sensor of the solar heat collection system detects that the outlet water temperature of the solar heat collection system cannot reach the set outlet water temperature, signals are transmitted to a PLC control module, the PLC control module controls a water circulating pump, an adjusting valve, an electric ball valve and a water source heat pump unit on a second water inlet pipe, a second water outlet pipe, a fifth water outlet pipe, a sixth water outlet pipe and a seventh water inlet pipe to be all opened, the outlet water of the solar heat collection system enters the heat collection water tank, the water source heat pump unit exchanges heat between the heat collection water tank and the constant temperature water tank according to the high energy efficiency ratio characteristic of the water source heat pump unit, and quickly transfers the heat in the heat collection water tank to the constant temperature water tank to realize secondary heating, the other side of the constant-temperature water tank is connected with a park heat user end, and after the heat of water in the heat collection water tank is absorbed, the water circulating pump on the second water outlet pipe sends the water to the solar heat collection system for heating again;

winter heating three modes: the combination of the third loop and the seventh loop is a winter heating mode, namely an air source heat pump unit, a constant temperature water tank and a park heat user side, when no solar radiation exists or solar energy output is insufficient, the air source heat pump unit starts to work, if an outlet water temperature sensor of the air source heat pump unit detects that the outlet water temperature of the air source heat pump unit can reach a set temperature value, a signal is transmitted to a PLC control module, the PLC control module controls a water circulating pump, a regulating valve, an electric ball valve and the air source heat pump unit on a third water inlet pipe, a third water outlet pipe and a seventh water inlet pipe to be started, hot water heated in the air source heat pump unit directly enters the constant temperature water tank and then enters the park heat user side for heating;

heating in winter in four modes: the combination of the fourth loop, the fifth loop, the sixth loop and the seventh loop is a four-mode heating mode in winter, namely an air source heat pump unit, a heat collection water tank, a water source heat pump, a constant temperature water tank and a park hot user end, when no solar radiation exists and a water outlet temperature sensor of the air source heat pump unit detects that the water outlet temperature of the air source heat pump unit cannot reach a set temperature, signals are transmitted to a PLC control module, the PLC control module controls a fourth water inlet pipe, a fourth water outlet pipe, a fifth water outlet pipe, a sixth water outlet pipe, a water circulating pump, a regulating valve, an electric ball valve, the water source heat pump unit and the air source heat pump unit on the seventh water inlet pipe to be started, the water of the air source heat pump unit enters the heat collection water tank, the water source heat pump unit exchanges heat between the heat collection water tank and the constant temperature water tank by virtue of the high energy efficiency ratio characteristic, and quickly transfers the heat of the water in the heat collection water tank to the constant temperature water tank to realize secondary heating, the other side of the constant-temperature water tank is connected with a park heat user end, and after the heat of water in the heat collection water tank is absorbed, the water circulating pump on the fourth water outlet pipe sends water to the air source heat pump unit for heating.

The air source heat pump unit is a cold source during refrigeration in summer:

summer refrigeration mode: the combination of the third loop and the seventh loop is a summer refrigeration mode, namely an air source heat pump unit, a constant temperature water tank and a park cold user end, when an outlet water temperature sensor of the air source heat pump unit detects that the outlet water temperature of the air source heat pump unit is lower than the inlet water temperature of the set park cold user end, a signal is transmitted to a PLC control module, the PLC control module controls a water circulating pump, a regulating valve, an electric ball valve and the air source heat pump unit on a third inlet water pipe, a third inlet water pipe and a seventh inlet water pipe to be started, cold water in the air source heat pump unit directly enters the constant temperature water tank and then enters the park cold user end for refrigeration;

a summer refrigeration mode II: the combination of the fourth loop, the fifth loop, the sixth loop and the seventh loop is a summer refrigeration two-mode, namely an air source heat pump unit, a heat collection water tank, a water source heat pump, a constant temperature water tank and a garden cold user end, when an outlet water temperature sensor of the air source heat pump unit detects that the outlet water temperature of the air source heat pump unit is higher than the inlet water temperature of a set cold user, a signal is transmitted to a PLC control module, the PLC control module controls a fourth water inlet pipe, a fourth water outlet pipe, a fifth water outlet pipe, a sixth water outlet pipe, a water circulating pump, a regulating valve, an electric ball valve, the water source heat pump unit and the air source heat pump unit on the seventh water inlet pipe to be opened, the outlet water of the air source heat pump unit enters the heat collection water tank, the water source heat pump unit exchanges heat with the heat collection water tank and the constant temperature water tank by the high energy efficiency ratio characteristic of the water source heat pump unit, and rapidly carries out secondary cooling on the water in the constant temperature water tank, the other side of the constant-temperature water tank is connected with a garden cold user end, after water in the heat collection water tank is heated, the water circulating pump on the fourth water outlet pipe sends the water to the air source heat pump unit for refrigeration.

According to the invention, green energy such as solar energy and air energy is utilized to supply energy (warm energy and cold energy) to a park, and the park is controlled by the control system, so that efficient complementation of different energy sources under different climatic conditions and time periods is realized, the solar energy output during the daytime reduces the power consumption of the air source heat pump, the air source heat pump output at night and in rainy days makes up for the defect of insufficient solar energy output, the safe, clean, efficient and low-carbon utilization of the energy is finally realized, and the energy quality is comprehensively improved.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a winter heating mode according to the present invention;

FIG. 3 is a schematic diagram of a winter heating mode according to the present invention;

FIG. 4 is a schematic structural diagram of a three-mode heating mode in winter and a one-mode cooling mode in summer according to the present invention;

FIG. 5 is a schematic structural diagram of a four-mode heating mode in winter and a two-mode cooling mode in summer according to the present invention;

fig. 6 is a flowchart of the operation of the control system of the present invention.

Detailed Description

The invention is described in further detail below with reference to the figures and examples.

A multi-energy complementary combined heat and cold supplier for a campus as shown in figures 1 to 6 wherein: the method comprises the following steps: the system comprises a solar heat collecting system 1, an air source heat pump unit 2, a water source heat pump unit 3, a heat collecting water tank 4 and a constant temperature water tank 5; solar energy collection system 1, air source heat pump set 2 heat water, and water source heat pump set 3 is used for carrying out the secondary heating to the water that does not reach the temperature requirement, and solar energy collection system 1, air source heat pump set 2, water source heat pump set 3, hot-water collecting tank 4, thermostatic water tank 5 and district cold and hot user end 7 are connected between each and are formed seven return circuits, and seven return circuits communicate each other and form four modes of heating in winter and two refrigerated modes in summer, solar energy collection system 1 and air source heat pump set 2 work under different working pattern in order to satisfy user's cold and hot demand, and the working pattern is adjusted by control system according to climatic conditions and service conditions in real time. .

A first loop: the solar heat collection system 1 and the constant temperature water tank 5 are connected through a first water inlet pipe 6-1 and a first water outlet pipe 6-2 to form a first loop, two ends of the first water inlet pipe 6-1 are respectively connected with a water outlet end of the solar heat collection system 1 and a water inlet end of the constant temperature water tank 5, and two ends of the first water outlet pipe 6-2 are respectively connected with a water inlet end of the solar heat collection system 1 and a water outlet end of the constant temperature water tank 5;

a second circuit: the solar heat collection system 1 and the heat collection water tank 4 are connected through a second water inlet pipe 6-3 and a second water outlet pipe 6-4 to form a second loop, two ends of the second water inlet pipe 6-3 are respectively connected with a water outlet end of the solar heat collection system 1 and a water inlet end of the heat collection water tank 4, and two ends of the second water outlet pipe 6-4 are respectively connected with a water inlet end of the solar heat collection system 1 and a water outlet end of the heat collection water tank 4;

a third loop: the air source heat pump unit 2 and the constant temperature water tank 5 are connected through a third water inlet pipe 6-5 and a third water outlet pipe 6-6 to form a third loop, two ends of the third water inlet pipe 6-5 are respectively connected with a water outlet end of the air source heat pump unit 2 and a water inlet end of the constant temperature water tank 5, and two ends of the third water outlet pipe 6-6 are respectively connected with a water inlet end of the air source heat pump unit 2 and a water outlet end of the constant temperature water tank 5;

a fourth circuit: the air source heat pump unit 2 and the heat collection water tank 4 are connected through a fourth water inlet pipe 6-7 and a fourth water outlet pipe 6-8 to form a fourth loop, two ends of the fourth water inlet pipe 6-7 are respectively connected with a water outlet end of the air source heat pump unit 2 and a water inlet end of the heat collection water tank 4, and two ends of the fourth water outlet pipe 6-8 are respectively connected with a water inlet end of the air source heat pump unit 2 and a water outlet end of the heat collection water tank 4;

a fifth loop: the water source heat pump unit 3 and the constant temperature water tank 5 are connected through a fifth water inlet pipe 6-9 and a fifth water outlet pipe 6-10 to form a fifth loop, two ends of the fifth water inlet pipe 6-9 are respectively connected with a water outlet end of the water source heat pump unit 3 and a water inlet end of the constant temperature water tank 5, and two ends of the fifth water outlet pipe 6-10 are respectively connected with a water inlet end of the water source heat pump unit 3 and a water outlet end of the constant temperature water tank 5;

a sixth circuit: the water source heat pump unit 3 and the heat collection water tank 4 are connected through a sixth water inlet pipe 6-11 and a sixth water outlet pipe 6-12 to form a sixth loop, two ends of the sixth water inlet pipe 6-11 are respectively connected with the water outlet end of the water source heat pump unit 3 and the water inlet end of the heat collection water tank 4, and two ends of the sixth water outlet pipe 6-12 are respectively connected with the water inlet end of the water source heat pump unit 3 and the water outlet end of the heat collection water tank 4;

a seventh circuit: the constant-temperature water tank 5 and the park cold and hot user side 7 are connected through seventh water inlet pipes 6-13 and seventh water outlet pipes 6-14 to form a seventh loop, two ends of the seventh water inlet pipes 6-13 are respectively connected with a water outlet end of the constant-temperature water tank 5 and a water inlet end of the park cold and hot user side 7, and two ends of the seventh water outlet pipes 6-14 are respectively connected with a water inlet end of the constant-temperature water tank 5 and a water outlet end of the park cold and hot user side 7. The water inlet ends of the same equipment in different loops can be the same port or different ports, and the water outlet ends can be the same port or different ports, as shown in fig. 1.

Further, the solar heat collecting system 1 comprises a plurality of groups of heat collecting modules connected in parallel, and the heat collecting modules are formed by connecting four groups of heat collecting plates 1-1 in series.

Further, the air source heat pump unit 2 is formed by connecting a plurality of groups of air source heat pumps in parallel.

Further, the first water outlet pipe 6-2, the second water outlet pipe 6-4, the third water outlet pipe 6-6, the fifth water outlet pipe 6-10, the sixth water inlet pipe 6-11, the sixth water outlet pipe 6-12 and the seventh water inlet pipe 6-13 are all provided with a water circulating pump 8.

Furthermore, a regulating valve 9 is arranged on the seventh water inlet pipe 6-13; the first water inlet pipe 6-1, the first water outlet pipe 6-2, the second water inlet pipe 6-3, the second water outlet pipe 6-4, the third water inlet pipe 6-5, the third water outlet pipe 6-6, the fourth water inlet pipe 6-7 and the fourth water outlet pipe 6-8 are all provided with electric ball valves 10. The regulating valve 9 and the electric ball valve 10 respectively control the flow and the on-off of the pipeline.

Further, the cold and hot combined supply device further comprises a water treatment silicon crystal tank 11, and the water treatment silicon crystal tank 11 is connected with the heat collection water tank 4 and the constant temperature water tank 5 through a connecting water pipe 12 respectively. The water entering the heat collecting water tank 4 and the constant temperature water tank 5 is treated and softened by the water treatment silicon crystal tank 11, calcium and magnesium ions in the water can be removed, and scaling and corrosion of pipelines are effectively prevented.

Further, valves 13 are arranged on the water inlet end and the water outlet end of the solar heat collecting system 1, the water inlet end and the water outlet end of the water circulating pump 8, the water inlet end and the water outlet end of the water treatment silicon crystal tank 11 and the connecting water pipe 12. The valve 13 is a manual valve, which is opened in the daily use process and closed when the equipment and the pipe network are overhauled.

When the water outlet temperature of the solar heat collection system 1 meets the water inlet requirement of a user side, the first loop and the seventh loop form a winter heating mode, namely a solar heat collection system-a constant temperature water tank-a garden heat user side;

when the sun irradiates, but the ambient temperature is low, and the water outlet temperature of the solar heat collecting system 1 does not meet the water inlet requirement of a user side, the second loop, the fifth loop, the sixth loop and the seventh loop form a winter heating mode, namely a solar heat collecting system, a heat collecting water tank, a water source heat pump, a constant temperature water tank and a park heat user side;

when no solar irradiation exists or the solar output is insufficient, but the outlet water temperature of the air source heat pump unit meets the water inlet requirement of a user side, the third loop and the seventh loop form a winter heating three mode, namely an air source heat pump unit, a constant temperature water tank and a park heat user side;

when no solar radiation exists and the outlet water temperature of the air source heat pump unit does not meet the water inlet requirement of a user side, the fourth loop, the fifth loop, the sixth loop and the seventh loop form a winter heating mode, namely an air source heat pump unit, a heat collecting water tank, a water source heat pump, a constant temperature water tank and a park heat user side;

when the air source heat pump unit is a cold source, and when the outlet water temperature of the air source heat pump unit meets the conditions, the combination of the third loop and the seventh loop is a summer refrigeration mode, namely the air source heat pump unit, a constant temperature water tank and a park refrigeration user end;

when the outlet water temperature of the air source heat pump unit does not meet the condition, the combination of the fourth loop, the fifth loop, the sixth loop and the seventh loop is a summer refrigeration two mode, namely an air source heat pump unit, a heat collecting water tank, a water source heat pump, a constant temperature water tank and a park cold user end.

A control system of a multi-energy complementary park combined cooling and heating device comprises a PLC control module, a temperature acquisition module, a flow acquisition module, an execution module and an upper computer control system;

the temperature acquisition module comprises a solar heat collection system temperature sensor, an air source heat pump unit water outlet temperature sensor, a heat collection water tank temperature sensor, a constant temperature water tank temperature sensor and a park cold and hot user side water supply and return temperature sensor, the signal output end of the temperature acquisition module is respectively connected with the signal input end of the PLC control module, and the temperature acquisition module transmits acquired temperature information to the PLC control module for data processing; the solar heat collection system temperature sensor is used for detecting the water outlet temperature of the solar heat collection system 1, the air source heat pump unit water outlet temperature sensor is used for detecting the water outlet temperature of the air source heat pump unit 2, the heat collection water tank temperature sensor is used for detecting the temperature of water in the heat collection water tank 4, the constant temperature water tank temperature sensor is used for detecting the temperature of water in the constant temperature water tank 6, and the park cold and hot user side water supply and return temperature sensor is used for detecting the temperature condition of water at the park cold and hot user side.

The flow acquisition module comprises a plurality of groups of flow sensors arranged on each pipeline, the signal output end of the flow acquisition module is connected with the signal input end of the PLC control module, the flow acquisition module transmits the acquired water flow information in each pipeline to the PLC control module for data processing, and the heat generated and consumed by the system is calculated;

the execution module comprises a water circulating pump 8, an electric ball valve 10 and a regulating valve 9, the input end of the execution module is connected with the signal output end of the PLC control module, the PLC control module collects the switching information of the execution module, and the execution module receives the execution signal sent by the PLC control module and carries out starting, stopping and switching instructions;

and the PLC control module is electrically connected with the upper computer control system. The upper computer control system realizes the man-machine interaction function of the combined cooling and heating device, and an administrator can check the real-time running state of the system, make a control strategy, manually control the system, check historical curves of all variables and export a running report of the system in the upper computer system.

The switching of four heating modes in winter is automatically started under the control of the PLC control module according to the collection of the temperature collection module on each temperature, and the temperature of the solar heat collection system 1 is T₁The temperature of the heat collecting water tank is T₂The temperature of the constant-temperature water tank is T₃The outlet water temperature of the air source heat pump unit is T₄The set value of each temperature condition is C_i。

Heating in winter in one mode: when the measured value of the temperature sensor of the solar heat collection system is higher than the set inlet water temperature of the park heat user side, the PLC control module controls the water circulating pump 8, the regulating valve 9 and the electric ball valve 10 on the first water inlet pipe 6-1, the first water outlet pipe 6-2 and the seventh water inlet pipe 6-13 to be opened, so that hot water in the solar heat collection system 1 directly enters the constant temperature water tank 5 and then enters the park heat user side for heating; starting conditions are as follows: t is₁>C₁&(T₁-T₃)>C₂&T₃<C₃(ii) a Stopping conditions are as follows: (T)₁-T₃)<C₄；

Heating in winter in two modes: when the measured value of the temperature sensor of the solar heat collection system is lower than the set outlet water temperature, the PLC control module controls the second water inlet pipe 6-3, the second water outlet pipe 6-4, the fifth water outlet pipe 6-10, the sixth water outlet pipe 6-12, the water circulating pump 8, the regulating valve 9, the electric ball valve 10 and the water source heat pump unit 3 on the seventh water inlet pipe 6-13 to be opened, the outlet water of the solar heat collection system 1 enters the heat collection water tank, the water source heat pump unit 3 carries out heat exchange in the heat collection water tank 4 and the constant temperature water tank 5 according to the high energy efficiency ratio characteristic, the heat of the water in the heat collection water tank 4 is quickly transferred into the constant temperature water tank 5 to realize secondary heating, the other side of the constant temperature water tank 5 is connected with a park heat user end, after the heat of the water in the heat collection water tank 4 is absorbed, a water circulating pump on the second water outlet pipe 6-4 sends water to the solar heat collecting system for heating; starting conditions are as follows: c₈<T₁<C₉&(T₁-T₂)>C₁₀(ii) a Stopping conditions are as follows: (T)₁-T₂)<C₁₁；

Winter heating three modes: when the measured value of the temperature sensor of the outlet water of the air source heat pump unit reaches the set temperature value, the PLC is used for controlling the temperature of the outlet waterThe control module controls a water circulating pump 8, a regulating valve 9, an electric ball valve 10 and an air source heat pump unit 2 on a third water inlet pipe 6-5, a third water outlet pipe 6-6 and a seventh water inlet pipe 6-13 to be started, hot water heated in the air source heat pump unit 2 directly enters a constant temperature water tank 5, and then enters a park heat user side for heating; starting conditions are as follows: t is₁<C₅&T₃<C₆(ii) a Stopping conditions are as follows: t is₃>C₇；

Heating in winter in four modes: when the measured value of the temperature sensor of the outlet water of the air source heat pump unit is lower than the set temperature value, the PLC control module controls the fourth water inlet pipe 6-7, the fourth water outlet pipe 6-8, the fifth water outlet pipe 6-10, the sixth water outlet pipe 6-12, the water circulating pump 8 on the seventh water inlet pipe 6-13, the regulating valve 9, the electric ball valve 10, the water source heat pump unit 3 and the air source heat pump unit 2 to be opened, the outlet water of the air source heat pump unit 2 enters the heat collecting water tank 4, the water source heat pump unit 3 carries out heat exchange in the heat collection water tank 4 and the constant temperature water tank 5 according to the high energy efficiency ratio characteristic, the heat of the water in the heat collection water tank 4 is quickly transferred into the constant temperature water tank 5 to realize secondary heating, the other side of the constant temperature water tank 5 is connected with a park heat user end, after the heat of the water in the heat collection water tank 4 is absorbed, a water circulating pump 8 on a fourth water outlet pipe 6-8 sends water to the air source heat pump unit 2 for heating; starting conditions are as follows: t is₁<C₁₂&T₂>C₁₃(ii) a Stopping conditions are as follows: t is₂<C₁₄&T₃>C₁₅。

The temperature condition set values in the winter heating mode setting of a park are as follows:

C₁＝55℃；C₂＝15℃；C₃＝60℃；C₄＝5℃；C₅＝50℃；C₆＝42℃；C₇＝50℃；C₈＝32℃；C₉＝50℃；

C₁₀＝10℃；C₁₁＝5℃；C₁₂＝28℃；C₁₃＝17℃；C₁₄＝48℃；C₁₅＝13℃

the switching of the two modes of refrigeration in summer is controlled by the PLC according to the collection of the temperature collection module to each temperatureThe module is controlled to be automatically opened, and the temperature of the solar heat collecting system 1 is T₁The temperature of the heat collecting water tank is T₂The temperature of the constant-temperature water tank is T₃The outlet water temperature of the air source heat pump unit is T₄Each temperature condition set value is K_i。

Summer refrigeration mode: when the measured value of the air source heat pump unit water outlet temperature sensor is lower than the set water inlet temperature of the garden cold user end, the PLC control module controls the water circulating pump 8, the regulating valve 9, the electric ball valve 10 and the air source heat pump unit 2 on the third water inlet pipe 6-5, the third water outlet pipe 6-6 and the seventh water inlet pipe 6-13 to be opened, so that cold water in the air source heat pump unit 2 directly enters the constant temperature water tank 5 and then enters the garden cold user end for refrigeration; starting conditions are as follows: t is₄<K₁&T₃>K₂(ii) a Stopping conditions are as follows: (T)₃-T₄)<K₃；

A summer refrigeration mode II: when the measured value of the outlet water temperature sensor of the air source heat pump unit is higher than the set inlet water temperature of the cold user, the PLC control module controls the fourth water inlet pipe 6-7, the fourth water outlet pipe 6-8, the fifth water outlet pipe 6-10, the sixth water outlet pipe 6-12, the water circulating pump 8 on the seventh water inlet pipe 6-13, the regulating valve 9, the electric ball valve 10, the water source heat pump unit and the air source heat pump unit 2 to be opened, the water outlet of the air source heat pump unit 2 enters the heat collecting water tank 4, the water source heat pump unit 3 is characterized in that heat exchange is carried out between the heat collection water tank 4 and the constant temperature water tank 5 according to the high energy efficiency ratio, the water in the constant temperature water tank 5 is rapidly cooled for the second time, the other side of the constant temperature water tank 5 is connected with a garden cold user end, after the water in the heat collection water tank 4 is heated, a water circulating pump 8 on a fourth water outlet pipe 6-8 sends water to the air source heat pump unit 2 for refrigeration; starting conditions are as follows: k₁<T₄<K₄&T₂<K₅(ii) a Stopping conditions are as follows: t is₃<K₆。

The temperature condition set values in the summer refrigeration mode setting of a park are as follows:

K₁＝20℃；K₂＝27℃；K₃＝3℃；K₄＝28℃；K₅＝30℃；K₆＝20℃。