Control method and device for multi-union-type cold and hot water unit and multi-union-type cold and hot water unit

A technology of cold and hot water units and control methods, which is applied to refrigerators, refrigeration components, compressors, etc., and can solve problems such as the inability of the system to operate efficiently and energy-saving, and the inability to realize joint control of indoor units and outdoor units

CN110779232AActive Publication Date: 2020-02-11ZHUHAI GREE REFRIGERATION TECH CENT OF ENERGY SAVING & ENVIRONMENTAL PROTECTION
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-02-11

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Abstract

The invention relates to a control method and device for a multi-union-type cold and hot water unit and the multi-union-type cold and hot water unit. The method comprises the steps that operation parameters of an indoor unit are acquired; a target value of outdoor water temperature output is determined; the temperature changing amount of the outdoor unit is calculated, and the ratio of loads of the indoor unit and the outdoor unit is determined; and the target value is corrected according to the temperature changing amount and the ratio of the loads of the indoor unit and the outdoor unit. According to the technical scheme provided by the invention, the operation parameters of the indoor unit are acquired, and the target value of outdoor water temperature output is determined according tothe operation parameters; the target value is corrected according to the outdoor unit temperature changing amount and the ratio of the loads of the indoor unit and the outdoor unit, so that union control of the indoor unit and the outdoor unit is realized; the operation state of the indoor unit is considered, and the target value of the outdoor water temperature output is also taken into consideration; an optimum control state with comfort and energy-saving performance is reached; and the whole system is operated in a high-efficient and energy-saving manner.
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Description

technical field

[0001] The invention relates to the technical field of air conditioning control, in particular to a control method and device of a multi-connected hot and cold water unit and the multi-connected hot and cold water unit. Background technique

[0002] The multi-connected hot and cold water unit, that is, the host machine first takes chilled water or hot water, and then transports it to the air conditioner at the end for the user to adjust the air through the pipeline (for the structural diagram of the multi-connected hot and cold water unit, see figure 1 shown). Compared with the multi-connected fluorine system, the multi-connected hot and cold water units have control delays due to the fact that there are many terminals connected to the main engine and heat exchange is performed by water.

[0003] The outdoor unit is connected to multiple indoor units through the waterway. Since the group control design is required, and the indoor unit directly controls the o...

Examples

Embodiment Construction

[0055] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0056] figure 2 It is a flow chart of a control method of a multi-connected chiller and hot water unit shown according to an exemplary embodiment, as shown in figure 2 As shown, the method includes:

[0057] Step S11, obtaining the operating parameters of the indoor unit;

[0058] Step S12. Determine the target value of the water temperature output of the outdoor unit according to the opera...