CN216667871U

CN216667871U - Energy-saving and protecting device of central air-conditioning water system

Info

Publication number: CN216667871U
Application number: CN202123014840.8U
Authority: CN
Inventors: 莫晓君
Original assignee: Hubei Unknown Information Technology Co ltd
Current assignee: Hubei Unknown Information Technology Co ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-06-03
Anticipated expiration: 2031-12-03

Abstract

The utility model discloses an energy-saving and protecting device of a central air-conditioning water system, which is particularly used for realizing the energy saving and the protection of the system by adding a buffer pipeline at the circulating side of chilled water. The refrigerated water on the water supply side of the machine room host machine is conveyed to a user water delivery variable frequency pump and a buffer pipeline through a water supply pipeline, the backwater of the refrigerated water on the user side returns to a backwater pipeline through a water collector, and the buffer pipeline is connected to the side of the water collector. When the temperature of water in the pipeline reaches a certain condition, the equipment in the machine room stops working, the water delivery variable frequency pump of a user continues working at the moment, the equipment on the user side can continue to work normally through the water amount in the bypass branch pipe, and the restart time of the main engine in the machine room is delayed. Otherwise, the time of shutdown of the machine room host is delayed by utilizing the water quantity in the buffer pipeline. According to the utility model, the cycle of frequent switching is increased by the machine room main machine, the service life of the machine room main machine is further prolonged, the energy-saving effect is realized, and the cost is very low.

Description

Energy-saving and protecting device of central air-conditioning water system

Technical Field

The utility model belongs to the technical field of central air-conditioning water systems, and particularly relates to an energy-saving and protecting device of a central air-conditioning water system.

Background

The principle of the buffer water tank is a water energy storage technology of the air-conditioning system, the running water quantity in the small air-conditioning system is increased, and the problems of load fluctuation and frequent starting of a host caused by too small system requirements can be effectively solved, so that the purposes of prolonging the service life of equipment and saving energy and electricity are achieved. In a central air-conditioning system without using a buffer water tank, when the circulating water volume in a loop is low, the water temperature bottom line is reached within a short time after a host is started, and the host stops working; then, the water temperature reaches the starting condition of the main machine again in a short time, and the main machine starts to start again. Frequent starting of the host greatly reduces the service life of the host and wastes a large amount of electric energy.

The buffer water tank in the general air conditioning system is a separate purchasing accessory, and the cost of the component is separately paid out. Meanwhile, the factors such as installation direction, height and the like need to be considered during installation. If any of the above conditions is not satisfied, the effect is not good or the cost is increased.

SUMMERY OF THE UTILITY MODEL

In view of the above features and problems, there is provided an energy saving and protecting apparatus for a water system of a central air conditioner, which solves the problems of price and installation faced in the background above.

In order to achieve the purpose, the utility model provides the following technical scheme:

a buffer pipeline is added at the chilled water side, the machine room host equipment comprises a machine room host, a chilled water pump and a cooling water pump, and the buffer pipeline comprises a user water delivery variable frequency pump, a water collector, a water separator, a bypass branch pipe, a terminal equipment side water supply and return pipeline, a valve and a controller. The water supply side of the host is connected with a user water delivery variable frequency pump and a buffer pipeline through a pipeline valve, the user water delivery variable frequency pump is connected with a water separator through the pipeline valve,

preferably, check valves and stop valves are added for the inlet and outlet of each device, so as to prevent the reverse water supply of the water system, avoid the impact and facilitate the maintenance and overhaul of the device.

Preferably, the user water delivery variable frequency pump is a constant differential pressure variable frequency pump, and the differential pressure value is taken from a pressure sensor which is the most unfavorable point at the farthest user side in the water path.

Preferably, the chilled water on the water supply side of the machine room main machine is conveyed to a user water conveying variable frequency pump and a buffer pipeline through a water supply pipeline, and the user water conveying variable frequency pump outputs air-conditioning chilled water to be conveyed to the user side through a water separator.

Preferably, the return water of the chilled water at the user side returns to the return water pipeline through a water collector, and the side of the water collector is simultaneously connected with a bypass branch pipe for buffering. Preferably, the working frequency of the user water delivery variable-frequency pump is adjusted through the frequency converter, so that the rotating speed and the flow output by the water pump are adjusted, and the water quantity requirement of a user terminal is matched. One end of the buffer pipeline is taken from a water supply pipeline between the host and the user water delivery variable frequency pump, the other end of the buffer pipeline is connected to the water collector, and through actual measurement and installation, the water supply and return water of the air conditioner in the buffer pipeline are guaranteed to be fully mixed so as to fulfill the aim of buffer adjustment.

Preferably, the chilled water backwater returns to the machine room main machine through the chilled water pump to perform cold and heat exchange, so that the heat exchange process of the chilled water loop is completed.

Preferably, when the machine room host machine normally works, the buffer pipeline can serve as a buffer water tank, the water quantity in the buffer water tank can slow down the process that the water quantity in the machine room host machine pipeline reaches the set temperature, the host machine startup time is prolonged, and the machine room host machine shutdown time is delayed.

Preferably, when the water temperature in the pipeline reaches a set condition, the machine room main machine and the chilled water pump stop working, the user water delivery variable frequency pump continues working at the moment, water supply buffering is carried out through residual water in the circulating water separator, the user side pipeline, the water collector and the bypass branch pipe, normal work of equipment on the user side can be guaranteed, and the restart time of the machine room main machine is delayed.

Through the device, the service life of the machine room host is further prolonged, the energy-saving effect is realized, and the cost is reduced.

Advantageous effects

Utilize above-mentioned device to set up the buffer pipe way, can go in the integrated system pipeline of buffer tank, through suitable calculation and installation, can guarantee that buffer tank obtains satisfying in the aspect of volumetric capacity, heat preservation effect, pressure-bearing nature, exhaust effect and heat exchange efficiency etc.. According to the utility model, on the premise of ensuring the buffering effect, the buffering water tank is changed into the buffering pipeline integrated in the pipeline, so that the installation position of the original buffering water tank is saved, the installation size of the whole system is reduced, the material and construction costs are saved, the service life of the machine room host is further prolonged, and the energy-saving effect is realized.

Drawings

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

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the embodiment provides a secondary water pumping system of an air-conditioning water system, which includes a water supply main pipe 1, a water supply main pipe 2, a bypass branch pipe, a water collector and a water separator; the input end of the main pipe 1 is connected with the output end of the main machine equipment of the machine room, and the output end of the main pipe 1 is divided into two paths through tapping equipment to be connected with the main pipe 2 and the bypass branch pipe respectively; equipment such as a delivery pump, a gate valve, a check valve and the like is arranged between the main pipe 2 and the water separator; the tail end of the bypass branch pipe is connected with an input port of the water collector.

When the machine room unit equipment works, the chilled water is output from the machine room equipment in summer and is output along the water supply main pipe 1 to be conveyed to the terminal equipment. After passing through the water supply main pipe 1, the chilled water flows to the water supply main pipe 2 and the bypass branch pipes, wherein the diameter of the water supply main pipe 2 is large, so most chilled water flows to equipment such as a delivery pump at the front end of the water separator through the water supply main pipe 2, is pressurized by the equipment such as the delivery pump and then is sent to the water separator, the water separator regulates the pressure of the chilled water and then conveys pipelines of terminal equipment at all levels, and the chilled water is returned by the water collector and is sent to equipment in a machine room in a centralized manner. And part of the chilled water flows back to the water collector through the bypass branch pipe and is conveyed back to the machine room equipment, so that closed loop circulation inside the pipeline is completed. The water collector, the water distributor, the terminal equipment, the water supply main pipe 1 and the bypass branch pipe jointly form a buffer pipeline, and residual water can still maintain the continuous operation of rear-end equipment on the premise of ensuring that the machine room equipment is not frequently stopped.

When the machine room unit equipment is temporarily stopped, the chilled water cannot be continuously output from the machine room equipment in summer, and the chilled water can still flow along the water supply main pipe 2 and is output through the water distributor to the direction of the terminal equipment under the action of equipment such as a conveying pump at the front end of the water distributor. After passing through the terminal equipment, the chilled water flows back to the water collector, and flows to the water main 2 through the bypass branch pipe. The water flow direction in the water collector, the water distributor, the terminal equipment and the water supply main pipe 2 is the same as the flow direction of the machine room unit equipment during working, and the water flow direction in the bypass branch pipe is opposite to the flow direction formed by the machine room unit equipment during working. The water collector, the water separator, the terminal equipment, the water supply main pipe 2 and the bypass branch pipe jointly form a buffer pipeline, and residual water can still maintain the continuous operation of the rear-end equipment on the premise of ensuring that the machine room equipment is not started frequently.

Through the regulation, utilize about buffer pipeline, furthest's reduction computer lab host computer equipment frequently opens and stops, accomplishes the effect of adjusting the water supply, finally compares prior art and has energy-conserving effect, and power consumption is few relatively, solves among the prior art that power consumption is big, extravagant serious, not energy-conserving problem, has reduced the frequent number of times that opens and stops of unit simultaneously, has prolonged the life of computer lab host computer.

Preferably, in order to improve the utilization rate and ensure the buffering effect, the inlet of the bypass branch pipe should be selected as large as possible to be installed on the side of the water main close to the host device, i.e. the length ratio of the water main 1 to the water main 2 is as large as possible.

Preferably, in order to improve the utilization rate and ensure the buffering effect, each end user loop should adjust the pressure of the branch pipe through the water collecting and distributing device, and the water pressure passing through the final fan coil device is ensured to meet the rated requirement.

Preferably, in order to improve the utilization rate and ensure the buffering effect, a pressure sensor is arranged in the most unfavorable loop to collect pressure signals, adjust the pressure and drive a delivery pump, wherein the delivery pump is a variable frequency pump.

Preferably, in order to improve the utilization rate and ensure the buffering effect, the lift of the delivery pump can ensure that the fan coil of the worst loop and the longest loop can normally work.

Claims

1. An energy-saving and protecting device of a central air-conditioning water system is characterized in that a buffer pipeline is added at a chilled water side, a machine room host device comprises a machine room host, a chilled water pump and a cooling water pump, and the buffer pipeline comprises a user water delivery variable-frequency pump, a water collector, a water separator, a bypass branch pipe, a terminal device side water supply and return pipeline, a valve and a controller; the water supply side of the host is connected with a user water delivery variable frequency pump and a buffer pipeline through a pipeline valve, and the user water delivery variable frequency pump is connected with a water separator through the pipeline valve.

2. The energy-saving and protecting device of a water system of a central air-conditioner according to claim 1, wherein the return chilled water of the user side is returned to the return line through a water collector, and a buffer line is connected to the water collector side.

3. The energy-saving and protecting device of a central air-conditioning water system of claim 1, characterized in that when the machine room host machine is working normally, the buffer pipeline and the water collector can function as a buffer tank, wherein the water amount can slow down the process that the water amount in the machine room host machine pipeline reaches the set temperature, prolong the startup time of the host machine and delay the shutdown time of the machine room host machine.

4. The energy-saving and protection device of a water system of a central air conditioner according to claim 1, characterized in that the user water delivery variable frequency pump is a constant pressure difference variable frequency pump, and the pressure difference value is a pressure sensor at the farthest user side and the most unfavorable point in the water path.

5. The energy-saving and protecting device of a water system of a central air conditioner as claimed in claim 1, wherein the chilled water of the water supply side of the main unit of the machine room is delivered to the user water delivery variable frequency pump and the buffer pipeline through the water supply pipeline, and the chilled water of the air conditioner is delivered from the user water delivery variable frequency pump to the user side through the water separator.

6. The energy-saving and protecting device of the water system of the central air conditioner as claimed in claim 3, wherein the working frequency of the user water delivery variable frequency pump is adjusted by the frequency converter, so as to adjust the rotating speed and flow rate output by the water pump to match the water demand of the user terminal; one end of the buffer pipeline is taken from a water supply pipeline between the host and the user water delivery variable frequency pump, the other end of the buffer pipeline is connected to the water collector, and through actual measurement and installation, the water supply and return water of the air conditioner in the buffer pipeline are guaranteed to be fully mixed so as to fulfill the aim of buffer adjustment.

7. The energy-saving and protecting device of a central air-conditioning water system as claimed in claim 3, wherein when the water temperature in the pipeline reaches a set condition, the main machine of the machine room and the chilled water pump stop working, at this time, the user water-delivery variable frequency pump continues working, and the user side equipment is ensured to continue working normally by circulating the residual water in the water separator, the user side pipeline, the water collector and the buffer pipeline, and the restart time of the main machine of the machine room is delayed.

8. An energy-saving and protecting apparatus for water system of central air conditioner according to claim 1, characterized in that check valves and stop valves are added to each of the equipment inlet and outlet for preventing the water system from being supplied with reverse water to avoid shock and facilitate the maintenance and repair of the equipment.

9. The energy-saving and protecting device of the water system of the central air conditioner as claimed in claim 1, wherein the return chilled water is returned to the main machine of the machine room through a chilled water pump for cold and heat exchange to complete the heat exchange process of the chilled water loop.