Water chilling unit and starting control method and device of water chilling unit

Abstract

The invention discloses a water chilling unit and a starting control method and device of the water chilling unit. The starting control device comprises a first temperature sensor arranged at the position of a chilled water outlet of an evaporator of the water chilling unit and used for detecting the temperature of the chilled water outlet, a second temperature sensor arranged at the position of acooling water outlet of the condenser of the water chilling unit and used for detecting the temperature of the cooling water outlet, and a controller connected with the first temperature sensor and the second temperature sensor, connected with an electronic expansion valve and a compressor of the water chilling unit and used for adjusting the opening degree of the electronic expansion valve to reach the preset time and then controlling starting of the compressor. By the adoption of the water chilling unit and the starting control method and device of the water chilling unit, the problem thatdue to the fact the compressor is started when the water chilling unit is in a temperature difference treatment state, high-temperature protection of a frequency converter or a motor is caused is avoided, and it is ensured that the unit can be started normally under the condition that the temperature of chilled water is higher than the temperature of cooling water in high-temperature weather.

Description

technical field

[0001] The invention relates to the technical field of detection, in particular to a water chiller and its start-up control method and device. Background technique

[0002] Chillers are currently widely used in all walks of life and are a commonly used refrigeration equipment. When the temperature difference in the installation environment of each component of the unit is not large, the chiller can start and work normally. However, when the weather is hot in summer, the outdoor temperature can reach 40°C. In some places of use (such as gymnasiums, etc.), the end of the large-scale chiller is directly installed on the translucent ceiling, and the chiller freezes when it is shut down under the sun. The return water temperature will be very high, which is almost equal to the ambient temperature of 40°C. At this time, the cooling water flow path is arranged in a place not exposed to direct sunlight, and the water temperature is only about 27°C. In this case, wh...

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