A system and method for testing the action of a sudden jump temperature controller for a cabinet

Abstract

The present invention provides a system and method for testing the action of a sudden jump temperature controller for a cabinet, comprising a constant temperature and humidity environment test box, a measured thermostat, a sampling thermostat, a load, and an action relay; the measured thermostat and the sampling thermostat are both placed in the constant temperature and humidity environment test box; the measured thermostat is connected to the load, the load is connected to the action relay, and the action relay is connected in series with a first indicator light; the load is used to simulate the application environment in the cabinet; the sampling thermostat is connected in series with a second indicator light; the measured thermostat and the sampling thermostat are also connected to a temperature acquisition unit, and the temperature acquisition unit is connected to a host computer. The system and method for testing the action of a sudden jump temperature controller for a cabinet described in the present invention avoids the influence of heat generated by the current flowing through the metal sheet when the measured thermostat is connected to the load, and the sampling thermostat can also supplement the difference caused by the different material of the metal sheet and the ambient temperature, and more accurately reflects the action accuracy of the thermostat.

Description

Technical Field

[0001] The invention belongs to the field of actuation test of a sudden jump type temperature controller for a power distribution cabinet of a wind power generator set, and in particular relates to an actuation test system and method of a sudden jump type temperature controller for a cabinet. Background Art

[0002] With the continuous development of the wind power industry, the development of the wind turbine control system industry has developed along with the development of the wind power industry and the wind power equipment industry, and has increased rapidly. The reliability of wind turbine cabinets has received more and more attention, and its good design, reliable quality and superior performance have become the decisive factors to ensure the normal and stable operation of the unit. Among them, in the power electronics industry, most of the components in the cabinet are restricted by the use environment. Heating and heat dissipation in the cabinet are crucial. As a control element, the sudden jump temperature controller has the top priority in terms of action accuracy and setting value. The sudden jump temperature controller is a bimetallic thermostat with a shell, hereinafter referred to as the thermostat. This thermostat is a new product of bimetallic thermostat, mainly used as the control of the cabinet heater and cooling fan. It is usually used in series, which can effectively prevent over-temperature and low temperature alarms in the cabinet, and has a very wide range of uses. Its characteristic is that the temperature increase generates accumulated heat that is transferred to the bimetallic strip, and the contact is actuated through the mechanism, thereby achieving the purpose of controlling the circuit.

[0003] However, in application, the thermostat is used in series with the load (fan, heater). The accumulated heat can easily affect the action of the thermostat, causing it to deviate from the control design. In addition, the action error and hysteresis values ​​marked by the thermostat manufacturers on the market are inaccurate. It is necessary to invent a reasonable and accurate testing method to solve such problems. Summary of the invention

[0004] In view of this, the present invention aims to overcome the defects existing in the above-mentioned prior art and proposes an action test system and method for a sudden jump temperature controller for a cabinet.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A sudden jump temperature controller action test system for a cabinet includes a constant temperature and humidity environment test chamber, a tested temperature controller, a sampling temperature controller, a load, and an action relay;

[0007] The measured thermostat and the sampling thermostat are both placed in a constant temperature and humidity environment test box;

[0008] The temperature controller under test is connected to a load, the load is connected to an action relay, and the action relay is connected in series with a first indicator light; the load is used to simulate the application environment in the cabinet;

[0009] The sampling temperature controller is connected in series with a second indicator light;

[0010] The measured temperature controller and the sampling temperature controller are also connected to a temperature acquisition unit, and the temperature acquisition unit is connected to a host computer.

[0011] Furthermore, the temperature acquisition unit includes a first temperature sensor, a second temperature sensor, and a data acquisition recorder;

[0012] The first temperature sensor is arranged on the bimetallic strip of the measured thermostat, and the second temperature sensor is arranged on the bimetallic strip of the sampling thermostat;

[0013] The first temperature sensor and the second temperature sensor are connected to a data acquisition recorder, and the data acquisition recorder is connected to a host computer; the host computer is used to display and record temperature values.

[0014] Furthermore, the data acquisition recorder is also connected to an action relay.

[0015] Furthermore, the temperature range of the constant temperature and humidity environment test box is -70°C to 150°C.

[0016] Furthermore, the data acquisition recorder adopts but is not limited to the data acquisition recorder of model MX100.

[0017] A test method based on a sudden jump temperature controller action test system for a cabinet comprises the following steps:

[0018] S1. Connect the test circuit according to the circuit diagram;

[0019] S2. Place the measured thermostat and the sampling thermostat into a constant temperature and humidity environment test chamber;

[0020] S3. Adjust the load size;

[0021] S4. Adjust the temperature and humidity of the constant temperature and humidity environment test chamber;

[0022] S5. Turn on the power supply and record the temperature value and action status in real time through the host computer;

[0023] S6. Determine whether the next environmental test is needed. If necessary, return to step S4; otherwise, proceed to the next step.

[0024] S7. Determine the performance of the measured thermostat according to the temperature value of the measured thermostat at the time of operation.

[0025] Furthermore, the load size in step S3 is the rated load size of the measured thermostat.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] Two thermostats are used for testing. The tested thermostat is connected to the load to simulate the application environment in the cabinet, and the sampling thermostat is used to collect the action temperature value. This avoids the influence of heat generated by the current flowing through the metal sheet when the thermostat is connected to the load. At the same time, the sampling thermostat can supplement the difference caused by the different metal sheet material and ambient temperature, and more accurately reflect the action accuracy of the thermostat. It can also provide a reference for whether the setting value of the thermostat in actual application is reasonable, which is of great significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 A schematic diagram of the principle of a test system according to an embodiment of the present invention;

[0030] Figure 2 A schematic diagram of the circuit principle of the test system according to an embodiment of the present invention;

[0031] Figure 3 The figure is a principle block diagram of the test system described in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0036] A sudden jump temperature controller action test tool for a cabinet is composed of a constant temperature and humidity environment test box, a temperature controller to be tested, a sampling temperature controller, a load, an action relay, a thermocouple, a data acquisition recorder, and a host computer.

[0037] 1. Constant temperature and humidity environment test chamber: -70℃~150℃

[0038] 2. Thermostat: -40℃~60℃

[0039] 3. Load: 0~800W

[0040] 4. Action relay: 24V coil

[0041] 5. Thermocouple: K type

[0042] 6. Data acquisition recorder: MX100

[0043] like Figure 1-3 As shown, the test system is composed of two thermostats as a group. The tested thermostat is connected to the load, the load is connected to the action relay, and the contactor is connected in series with an indicator light. The sampling thermostat is directly connected to the indicator light. The first temperature sensor is arranged on the bimetallic strip of the tested thermostat, and the second temperature sensor is arranged on the bimetallic strip of the sampling thermostat. The sensor temperature and the action relay contact are displayed on the upper computer software via the data acquisition recorder, and the temperature value and action status can be recorded in real time.

[0044] Two thermostats are tested as a group. The tested thermostat and the sampling thermostat are placed in a constant temperature and humidity environment test chamber. The tested thermostat is connected to a load (the load size is the rated load of the tested thermostat). After the power is turned on, the load is energized, and the current flows through the normally closed contact of the tested thermostat, causing the contact to heat up and the bimetallic strip to be affected, while the sampling thermostat is not affected. The two sensors are connected to the data acquisition recorder respectively, and the action relay is used to feedback to record the temperature value of the thermostat at the time of action. This temperature is used as the performance judgment standard of the thermostat.

[0045] Two thermostats are used for testing. The tested thermostat is connected to the load to simulate the application environment in the cabinet, and the sampling thermostat is used to collect the action temperature value. This avoids the influence of heat generated by the current flowing through the metal sheet when the thermostat is connected to the load. At the same time, the sampling thermostat can supplement the difference caused by the different metal sheet material and ambient temperature, and more accurately reflect the action accuracy of the thermostat. It can also provide a reference for whether the setting value of the thermostat in actual application is reasonable, which is of great significance.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A sudden jump temperature controller action test system for a cabinet, characterized in that: Including constant temperature and humidity environment test chamber, tested thermostat, sampling thermostat, load, action relay; The measured thermostat and the sampling thermostat are both placed in a constant temperature and humidity environment test box; The temperature controller under test is connected to a load, the load is connected to an action relay, and the action relay is connected in series with a first indicator light; the load is used to simulate the application environment in the cabinet; The sampling temperature controller is connected in series with a second indicator light; The measured temperature controller and the sampling temperature controller are also connected to a temperature acquisition unit, and the temperature acquisition unit is connected to a host computer; The temperature acquisition unit includes a first temperature sensor, a second temperature sensor, and a data acquisition recorder; The first temperature sensor is arranged on the bimetallic strip of the measured thermostat, and the second temperature sensor is arranged on the bimetallic strip of the sampling thermostat; The first temperature sensor and the second temperature sensor are connected to a data acquisition recorder, and the data acquisition recorder is connected to a host computer; the host computer is used to display and record temperature values; The data acquisition recorder is also connected to an action relay; The temperature range of the constant temperature and humidity environment test box is -70°C to 150°C; The data acquisition recorder adopts but is not limited to the data acquisition recorder of model MX100.

2. A test method for a cabinet snap-type temperature controller action test system according to claim 1, characterized in that: The steps include: S1. Connect the test circuit according to the circuit diagram; S2. Place the measured thermostat and the sampling thermostat into a constant temperature and humidity environment test chamber; S3. Adjust the load size; S4. Adjust the temperature and humidity of the constant temperature and humidity environment test chamber; S5. Turn on the power supply and record the temperature value and action status in real time through the host computer; S6. Determine whether the next environmental test is required. If necessary, change back to step S4, otherwise proceed to the next step; S7. Determine the performance of the measured thermostat according to the temperature value of the measured thermostat at the time of operation.

3. The test method of the actuation test system of the sudden jump temperature controller for a cabinet according to claim 2, characterized in that: The load size in step S3 is the rated load size of the measured thermostat.

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