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Condenser energy-saving refrigeration automatic control method and system

An automatic control system and condenser technology, applied in the direction of evaporator/condenser, refrigerator, refrigeration components, etc., can solve the problems of reducing condensation capacity, reducing fan operating frequency, reducing the number of fans turned on by the condenser, and achieving smooth operation. , the best energy-saving effect

Active Publication Date: 2016-06-01
上海爱控自动化设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, if an air-cooled condenser operates at an ambient temperature of 30°C, according to the commonly considered condenser heat transfer temperature difference of 8°C, that is, the condensing pressure control target is 38°C, and its condensing capacity reaches 50kw. If the current condensing load reaches 50kw, then the condensing The condenser runs at full load; if the current condensing load drops to 25kw, according to the conventional method, the condenser will reduce the condensing capacity (such as reducing the number of condenser fans or reducing the operating frequency of the fans), so that the condensing pressure is controlled at 38°C, so there is no maximum Make full use of the condensing capacity of the condenser

Method used

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  • Condenser energy-saving refrigeration automatic control method and system
  • Condenser energy-saving refrigeration automatic control method and system

Examples

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Embodiment 1

[0044] The invention provides an automatic control method for energy-saving refrigeration of a condenser, such as figure 1 As shown, it includes the following steps:

[0045] (1) Measure the temperature T1 of the condensing medium at the inlet of the condensing medium of the current condenser and the current condensing pressure T. The condensing capacity of the current condenser is defined as C, and the condensing capacity C when the condenser is opened to the maximum is set to 100%, and the condenser is closed When the condensation capacity C is set to 0%;

[0046] (2) According to the current condenser condensing capacity and the current condensing load, set the condenser heat transfer temperature difference as T2, the condensing pressure control target T0=T1+T2, stipulate that T2 has a minimum value of T2min, and the initial value of T2 is T2min ;

[0047] (3) According to the relationship between the current condensing pressure T and the target control T0, control C or T...

Embodiment 2

[0056] The present invention also provides a condenser energy-saving refrigeration automatic control system, the control system is connected with the condenser, such as figure 2 As shown, the system includes a temperature measurement unit 1, a calculation processing unit 2, an output control unit 3, and a condenser heat exchange target setting unit 4, and a temperature measurement unit 1, a condenser heat exchange target setting unit 4, and an output control unit 3 are respectively connected with computing processing unit 2, wherein

[0057] The temperature measurement unit 1 includes a condensation medium temperature measurement module 11 and a current condensation pressure temperature measurement module 12. The condensation medium temperature measurement module 11 is used to measure the temperature T1 of the medium at the entrance of the condenser, and the current condensation pressure temperature measurement module 12 is used to measure condensation. The current condensing...

Embodiment 3

[0072] A central air conditioner that uses air as the condensing medium. The condenser has multiple condensing units. Here, the condensing unit can be a fan. Initially set the heat exchange temperature difference T2min of the condenser, and control the condensing output capacity C of the condenser to make the current of the condenser Condensing pressure T=T0, condenser condensing pressure control target T0=T1+T2, T1 is the temperature value at the air inlet of the central air conditioner condenser.

[0073] The output capacity of the condenser is C, the size of C changes the size of the current condensing pressure T of the condenser, and the value range of C is 0-100%; T2 has a minimum value T2min.

[0074] The ambient temperature of the central air conditioner changes with time, and the temperature T1 at the inlet of the condensing medium also changes with the change of the ambient temperature;

[0075] When T>T0, give priority to increasing the condensing output capacity C o...

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Abstract

The invention provides an automatic control method for energy-saving refrigeration of a condenser. The method includes the specific steps: measuring temperature T1 and current condensing pressure T (the temperature represents saturation temperature during refrigerant condensation under corresponding pressure) of a condensation medium at a condensation medium inlet of a current condenser, and defining condensation capacity of the current condenser as C; according to the condensation capacity of the current condenser and weight of a current condensation load, setting a condenser condensation and heat transfer temperature difference control objective as T2 and a condensing pressure control objective T0=T1+T2, wherein T2 has a minimum value T2min, and an initial value of T2 is T2min; according to relation between the current condensing pressure T and the target control objective T0, controlling C or T2 under the condition that T0 is as small as possible until T=T0. By the control method for dynamic automatic regulation of the condensing pressure of the condenser, a system can work smoothly on the premise of achieving optimal condensing effect, so that the whole refrigeration system achieves the optimal energy-saving effect.

Description

technical field [0001] The invention relates to the technical field of condensers, in particular to a method for automatically controlling the condensing pressure of a condenser. Background technique [0002] When designing a cold storage, the condition for selecting the condenser type is to configure it according to the maximum condensation requirement of the system in the worst environment, and the condensing pressure control target is usually set according to this condition. For example, if the hottest temperature in summer in a certain area is 35°C, then the condenser, especially the air-cooled condenser, should be considered to have a condensation pressure of around 42°C when selecting the model (considering the heat transfer temperature difference of the condenser at 8°C), and the actual system input The condensing pressure is usually set to this value (the condensing target under the worst conditions) when using it. However, the ambient temperature is different in dif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B39/04F25B49/00
Inventor 刘海永胡献
Owner 上海爱控自动化设备有限公司