A performance test device for a food refrigerator

Abstract

The invention discloses a performance testing device for a food refrigerator, which comprises a box body, a top cover of the box body, an air handling unit, an air supply main pipe, an air mixing device, and an air supply orifice plate and a return air orifice plate arranged in parallel in the box body. The air orifice plate and the return air orifice divide the box into three areas, which are the air supply static pressure space and the return air static pressure space on both sides, and the test environment room in the middle; the air handling unit is located in the return air static pressure space Among them, the air handling unit communicates with the air supply static pressure space through the air supply main pipe, and the air mixing device is arranged in the air supply main pipe pipeline. The present invention adopts the way of parallel air supply to improve the airflow organization, which can ensure the uniformity and stability of the air flow and temperature and humidity in the test room during the test, can truly simulate the normal working environment of the food freezer, and ensure that the temperature, humidity and wind speed distribution in the test room reach JB / T ? 7244-1994 "Food Freezer" series standard requirements.

Description

technical field [0001] The invention belongs to the field of building environment and equipment engineering, and relates to a performance testing device for a food refrigerator. Background technique [0002] The food freezer test room device is widely used in the test of the freezing capacity, cooling speed, power consumption and other performance of the food freezer. The test room is required to be able to truly simulate the temperature, humidity and airflow organization of the actual use environment of the food freezer, so as to conduct various performance tests of the food freezer, and to monitor and analyze the temperature parameters in the food freezer in real time. The closer the test room can simulate the test temperature, humidity and airflow distribution to the actual use environment of the freezer, the more accurate the test results will be. [0003] Utility model patent CN201555720U A performance test room system for refrigerators and freezers. The test room is d...

AI Technical Summary

Problems solved by technology

[0004] The utility model patent CN201555720U uses a static pressure plate to solve the problem of uneven temperature and humidity of the air supply and air distribution in the existing test room to a certain extent, but it does not structurally improve the overall distribution of the air flow in the test environment

[0006] Utility model patent CN201944954U, the invention adopts the air supply and return form of side air supply and bottom air return. The air enters the environmental test chamber through the air supply orifices on both sides and then mixes with each other, which makes the air flow in local areas disordered, and the air flow cannot be guaranteed. The temperature and humidity and the stability of the airflow organization also have the problem of uneven airflow, which reduces the uniformity and stability of the airflow temperature, humidity and airflow organization in the test environment, and affects the test accuracy. At the same time, the airflow organization between the test environments is also It can't meet the requirements of JB / T7244-1994 "Food Refrigerator" series standards for airflow direction

[0008] Invention patent CN102434952A is suitable for solving the uniformity of air supply in a large area, large space, and high-precision environment. Because the size of the food freezer laboratory system is relatively small, and the space and area are relatively small, the above invention patent is not suitable for food freezer experiments. chamber system; secondly, the above-mentioned invention patent does not carry out quantitative calculations on the static plenum, and to meet the requirements of uniformity and accuracy, a larger static plenum is required, which is the result of the above-mentioned invention and the food refrigerator laboratory system Different places; secondly, each hole on the orifice plate of the above-mentioned invention patent is fixed with a conical boss. Compared with the food refrigerator laboratory system, the accuracy requirements are not high and considering the flow resistance, the conical boss is not required.

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