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Supply and return water temperature difference control system

A technology for supply and return water temperature difference and control system, which is applied in heating and ventilation control system, heating and ventilation safety system, space heating and ventilation control input, etc. It can solve problems such as excessive energy supply and difficulty in meeting comfort requirements, etc. To achieve the effect of increasing the temperature difference between supply and return water and avoiding the temperature difference between supply and return water being too large or too small

Active Publication Date: 2019-02-19
XINZHI ENERGY SYST CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a supply and return water temperature difference control system, which is used to solve the lag in adjusting the water supply flow according to the temperature difference, which is easy to cause excessive energy supply or difficult to meet the comfort requirements, and it is difficult to achieve effective control of the supply and return water temperature difference The problem

Method used

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  • Supply and return water temperature difference control system
  • Supply and return water temperature difference control system
  • Supply and return water temperature difference control system

Examples

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Embodiment 1

[0019] like figure 1 As shown, this embodiment provides a temperature difference control system for supply and return water, which is applied to large air-conditioning systems. The large air-conditioning system is composed of chillers and distributed in multiple partitions (that is, branch cooling areas, in figure 1 There are m partitions in the system), each partition covers multiple rooms or multiple sub-areas (for example, a larger area in a large shopping mall, factory, etc. includes multiple sub-areas), each room or each sub-area At least one air conditioner is installed inside. In the following description, a room is used as an example for illustration. According to different actual application scenarios, sub-areas may also be used instead of the room in this embodiment. The cold water unit is used to output cold water to each air conditioner, and the water output of the chiller unit is controlled by the total frequency conversion pump P101, and then the cooling capacit...

Embodiment 2

[0052] This embodiment provides a temperature difference control system for supply and return water. In this embodiment, the same parts as in Embodiment 1 are assigned the same reference numerals and their descriptions are omitted.

[0053] like figure 2 As shown, in this embodiment, the supply and return water temperature difference control system includes: multiple temperature control systems (not shown), gain characteristic average calculator H, temperature difference controller F, gain controller G, and water supply frequency converter Q .

[0054] like Figure 4 As shown, the difference between this embodiment and Embodiment 1 is that the temperature control system in this embodiment includes: a gain self-tuner E, a gain calculator O, and a temperature controller P.

[0055] Regarding the above gain self-tuner E, the actual room temperature T and the preset room temperature Tsp are respectively used as the input of the gain self-tuner E, and the gain characteristic val...

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Abstract

The invention discloses a control system for temperature difference of supply and return water, relates to the technical field of air conditioners, and is used for solving the problem that energy oversupply is liable to occur, comfort requirements are hard to meet, or temperature difference of supply and return water is hard to effectively control due to the fact that supply water flow adjustment according to temperature difference is delayed. The control system for temperature difference of supply and return water comprises a temperature difference controller, a plurality of temperature control systems, a gain characteristic average computer and a gain controller, wherein the difference of supply water temperature and return water temperature is adopted as a measurement value of the temperature difference controller; the temperature control systems are used for controlling the room temperature; gain characteristic values of the temperature control systems are adopted as input of the gain characteristic average computer; gain characteristic average values are adopted as output of the gain characteristic average computer; output of the temperature difference controller is adopted as a set value of the gain controller; and output of the gain characteristic average computer is adopted as a measurement value of the gain controller. The control system for temperature difference of supply and return water is used for central air conditioning systems.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a temperature difference control system for supply and return water. Background technique [0002] The existing air-conditioning temperature control system can adjust the room temperature by changing the wind speed gear. For example, the fan coil thermostat product control mode mostly adjusts the wind speed according to the temperature deviation between the actual room temperature and the room set temperature, and uses low speed for small temperature deviations. Windshield, medium temperature deviation adopts medium speed windshield, high temperature deviation adopts high speed windshield. [0003] The existing air-conditioning temperature control system also has a type that can continuously adjust the wind speed or water supply volume, which can continuously adjust the fan speed or water supply volume according to the room temperature to achieve temperature control. PID...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/83
CPCF24F11/30F24F11/62F24F11/64F24F11/83F24F2110/00F24F2140/20
Inventor 杜建波张宝山王欢王玉亮王志明
Owner XINZHI ENERGY SYST CONTROL
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