Dual-cold-source three-pipe-system air conditioner system

Abstract

The invention discloses a dual-cold-source three-pipe-system air conditioner system. The dual-cold-source three-pipe-system air conditioner system comprises an air conditioner terminal and a cold source system, wherein the cold source system comprises a high-temperature cold source and a low-temperature cold source; the outlet of the high-temperature cold source and the outlet of the low-temperature cold source are separately connected with a water supply pipe with a low-temperature water segregator, and the outlet of the water supply pipe is connected with the cold source inlet of the air conditioner terminal; the cold source outlet of a fan coil in the air conditioner terminal is connected with the inlet of the low-temperature cold source through a low-temperature water return pipe; a branch with a valve is arranged between the low-temperature water return pipe and the high-temperature water return pipe; the other cold source outlets of the air conditioner terminal are connected with the inlet of the high-temperature cold source through the high-temperature water return pipe; and the outlet of the high-temperature cold-source is also connected with the inlet of the low-temperature cold source. By adopting the dual-cold-source three-pipe-system air conditioner system, under the precondition that the total volume of the whole air conditioner water chilling unit is unchanged, the ratio of load borne by a high-temperature unit is improved to the greatest extent through reasonably allocating the ratios of the air conditioner load borne by the high-temperature unit and a low-temperature unit, so that the energy consumption of the cooling load of the whole air conditioner system is greatly lowered, and the air conditioner system is an energy-saving-type air conditioner system.

Description

technical field

[0001] The invention belongs to the technical field of central air-conditioning design, and specifically designs an air-conditioning system with two cold sources and three pipes. Background technique

[0002] The central air-conditioning system can be divided into a two-pipe system and a four-pipe system according to the arrangement of the hot and cold pipes. The so-called two-pipe system refers to a system in which the cold and heat sources use the same set of water supply and return pipes to provide cold water or hot water for the coil of the terminal device. The so-called four-pipe system means that the cold and heat sources respectively pass through their respective water supply and return pipes, and the system that provides air-conditioning cold water and hot water for the cold coil and hot coil of the terminal device is called a four-pipe system. There are four delivery pipes in the system. road.

[0003] The characteristics of the two-pipe system are...

Examples

Embodiment 1

[0063] Example 1: Dual cold sources in parallel with three control primary pump air-conditioning water system

[0064] Such as image 3 As shown in the figure, the air-conditioning cold source of the air-conditioning water system with two parallel cooling sources and three-pipe primary pumps is composed of a high-temperature cooling source and a low-temperature cooling source, and the high-temperature cooling source and the low-temperature cooling source are connected in parallel; the high-temperature cooling source and the low-temperature cooling source The sources are all cooled by cooling towers; the cooling water at the outlet of the cooling towers passes through the first cooling water pump CWPI and the second cooling water pump CWPII to provide cooling capacity for the high temperature cold source and the low temperature cold source respectively.

[0065]The supply water temperature of the high-temperature cold source is 10-16°C, the return water temperature is 15-21°C, ...

Embodiment 2

[0083] Example 2: Two-cooler parallel connection three-control two-stage pump air-conditioning water system

[0084] Such as Figure 4 As shown, different from Embodiment 1, in this system, a secondary pump system is adopted, and the chilled water secondary pump unit PII is arranged on the water supply pipe SP;

[0085] A differential pressure sensor PS for detecting the pressure difference between the water supply and return pipes is also provided, and the connection mode and working principle of the differential pressure sensor PS are the same as in Embodiment 1;

[0086] Between the water supply pipe SP and the high-temperature return pipe HRP or the low-temperature return pipe CRP, there is a second bypass pipe BPII with an electric control valve ECV and a second valve group, and the second bypass pipe BPII passes through the branch circuit and the high-temperature return pipe respectively. HRP is connected to the low temperature return pipe CRP, the fourth high temperatu...

technical field

[0001] The invention belongs to the technical field of central air-conditioning design, and specifically designs an air-conditioning system with two cold sources and three pipes. Background technique

[0002] The central air-conditioning system can be divided into a two-pipe system and a four-pipe system according to the arrangement of the hot and cold pipes. The so-called two-pipe system refers to a system in which the cold and heat sources use the same set of water supply and return pipes to provide cold water or hot water for the coil of the terminal device. The so-called four-pipe system means that the cold and heat sources respectively pass through their respective water supply and return pipes, and the system that provides air-conditioning cold water and hot water for the cold coil and hot coil of the terminal device is called a four-pipe system. There are four delivery pipes in the system. road.

[0003] The characteristics of the two-pipe system are...

Examples

Embodiment 1

[0063] Example 1: Dual cold sources in parallel with three control primary pump air-conditioning water system

[0064] Such as image 3 As shown in the figure, the air-conditioning cold source of the air-conditioning water system with two parallel cooling sources and three-pipe primary pumps is composed of a high-temperature cooling source and a low-temperature cooling source, and the high-temperature cooling source and the low-temperature cooling source are connected in parallel; the high-temperature cooling source and the low-temperature cooling source The sources are all cooled by cooling towers; the cooling water at the outlet of the cooling towers passes through the first cooling water pump CWPI and the second cooling water pump CWPII to provide cooling capacity for the high temperature cold source and the low temperature cold source respectively.

[0065]The supply water temperature of the high-temperature cold source is 10-16°C, the return water temperature is 15-21°C, ...

Embodiment 2

[0083] Example 2: Two-cooler parallel connection three-control two-stage pump air-conditioning water system

[0084] Such as Figure 4 As shown, different from Embodiment 1, in this system, a secondary pump system is adopted, and the chilled water secondary pump unit PII is arranged on the water supply pipe SP;

[0085] A differential pressure sensor PS for detecting the pressure difference between the water supply and return pipes is also provided, and the connection mode and working principle of the differential pressure sensor PS are the same as in Embodiment 1;

[0086] Between the water supply pipe SP and the high-temperature return pipe HRP or the low-temperature return pipe CRP, there is a second bypass pipe BPII with an electric control valve ECV and a second valve group, and the second bypass pipe BPII passes through the branch circuit and the high-temperature return pipe respectively. HRP is connected to the low temperature return pipe CRP, the fourth high temperatu...

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