Freezing dryer frequency conversion controller

Abstract

The utility model belongs to the technical field of frequency conversion control, and particularly discloses a refrigeration dryer frequency conversion controller which comprises an ST control chip, a panel communication module, a switching power supply module, a low-voltage power supply module, an output relay and a control output module. The switching power supply module and the low-voltage power supply module are connected with the power supply control end of the ST control chip, and the signal output end of the ST control chip is connected with the output relay and the control output module. The operating speed of the compressor is controlled through the variable-frequency controller, so that energy can be reasonably utilized, and the compressor of the variable-frequency refrigeration dryer does not need to be frequently turned on and turned off. The variable-frequency controller of the refrigeration dryer can keep the compressor of the refrigeration dryer in a stable running state all the time, vibration during starting and closing is reduced, and therefore noise is reduced. The refrigerating capacity of the refrigeration dryer is controlled by controlling the running speed of the compressor, so that temperature control fluctuation caused by excessive temperature is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency conversion control, in particular to a frequency conversion controller for a cold dryer. Background Art

[0002] A refrigerated dryer, short for a refrigerated dryer, utilizes new technology and is an air processing component in pneumatic systems. It utilizes a refrigerant to exchange heat with compressed air, reducing the compressed air temperature to a dew point between 2°C and 10°C. With the continuous development of the refrigerated dryer industry, more and more companies are entering the air compressor industry, attracting a growing number of people and leading to the emergence of many companies.

[0003] Most of the cold dryer controllers on the market are fixed-frequency drives, which have high energy consumption, loud noise and inaccurate control. Utility Model Content

[0004] The purpose of the present invention is to provide a variable frequency controller for a cold dryer to solve the problems mentioned in the above background technology that most cold dryer controllers on the market are fixed frequency driven, have high energy consumption, loud noise and inaccurate control.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a variable frequency controller for a cold dryer, comprising:

[0006] ST control chip, panel communication module, switching power supply module, low-voltage power supply module, output relay and control output module;

[0007] Among them, the panel communication module is connected to the communication end of the ST control chip, the switching power supply module and the low-voltage power supply module are connected to the power control end of the ST control chip, and the signal output end of the ST control chip is connected to the output relay and the control output module.

[0008] Preferably, two control output modules are provided.

[0009] Preferably, the low-voltage power supply module is a power supply module with a sampling function.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] Energy saving. By controlling the operating speed of the compressor through a frequency conversion controller, energy can be used rationally. The compressor of the variable frequency refrigerated dryer does not need to be frequently turned on and off, and the compressor always maintains a stable working environment, thereby reducing energy use and achieving energy saving effects of more than 30%.

[0012] Low noise. The variable frequency controller of the cold dryer can keep the compressor of the cold dryer in a stable operating state, reducing the vibration during startup and shutdown, thereby reducing noise.

[0013] High temperature control accuracy. The inverter controller of the cold dryer controls the cooling capacity of the cold dryer by controlling the operating speed of the compressor. It can effectively meet the control requirements in a timely manner and brake and run slowly when the set temperature is about to be reached. This will prevent the temperature from overshooting and causing temperature fluctuations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the circuit schematic diagram of the utility model;

[0015] Figure 2 This is the circuit schematic diagram of the ST control chip of the utility model;

[0016] Figure 3 This is the circuit schematic diagram of the panel communication module of the utility model;

[0017] Figure 4 This is a circuit diagram of the switching power supply module of the utility model;

[0018] Figure 5 This is a circuit diagram of the low-voltage power supply module of the utility model;

[0019] Figure 6 This is the circuit schematic diagram of the output relay of the utility model;

[0020] Figure 7 This is the circuit principle diagram of the control output module of the utility model. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] Example 1:

[0024] See also Figure 1-7The utility model provides a technical solution: a frequency conversion controller for a cold dryer, characterized in that it includes: an ST control chip, a panel communication module, a switching power supply module, a low-voltage power supply module, an output relay and a control output module;

[0025] The panel communication module is connected to the communication terminal of the ST control chip, the switching power supply module and the low-voltage power supply module are connected to the power control terminal of the ST control chip, and the signal output terminal of the ST control chip is connected to the output relay and the control output module. Two control output modules are provided. The low-voltage power supply module is a power supply module with a sampling function.

[0026] This solution is applicable to refrigerated dryers with a capacity of less than 2P. The input voltage is 220V, the bus voltage is 300V+, and the external isolation voltage is used.

[0027] The temperature sensor is pre-connected to the ST control chip, and the temperature range that needs to be heated is set in the ST control chip. Based on the temperature sensor's temperature detection of the working area, the temperature detection value is output to the ST control chip, and the ST control chip compares the detected temperature value with the pre-set temperature range for judgment.

[0028] This controller (provided circuit) obtains real-time condensing temperature and dew point temperature through temperature sensor sampling, and then combines the output of two temperature control control output modules (the output of the module is frequency-controlled) and the output of the output relay (the relay controls the fan, and when the condensing temperature is high, the fan is used to blow air to cool the condenser). The control module then controls the movement of the compressor to achieve the purpose of cooling.

[0029] Based on two control output modules, the operating frequency of the cold dryer is controlled to control the speed increase or deceleration of the cold dryer, thereby achieving temperature control. Based on this, the fan is controlled through the output relay to assist in cooling.

[0030] Real-time monitoring and real-time temperature changes are used to control the compressor's adaptive adjustable output, which is also called variable frequency output.

[0031] The main purpose of the cold dryer is to reduce the gas temperature to a stable dew point temperature and reduce the humidity while cooling, and supply the treated gas to equipment that requires stable dry gas.

[0032] Figure 1 This is the circuit diagram decomposed from the overall circuit diagram, where:

[0033] The ST control chip features anti-interference capabilities due to its design features. The panel communication module connects to the panel in real time, without delay and with strong anti-interference capabilities. The switching power supply module ensures stable voltage output. The low-voltage power supply module features a sampling function, ensuring stable voltage output with minimal fluctuation. The output relays are delay-free, anti-interference, and offer high power. The control output module offers low latency and strong anti-interference capabilities.

[0034] The circuit composition of ST control chip, panel communication module, switching power supply module, low voltage power supply module, output relay and control output module is specifically referenced. Figure 1-7 As shown, no further description is given here.

[0035] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A frequency conversion controller for a cold dryer, characterized in that: include: ST control chip, panel communication module, switching power supply module, low-voltage power supply module, output relay and control output module; Among them, the panel communication module is connected to the communication end of the ST control chip, the switching power supply module and the low-voltage power supply module are connected to the power control end of the ST control chip, and the signal output end of the ST control chip is connected to the output relay and the control output module.

2. The frequency conversion controller for a cold dryer according to claim 1, characterized in that: There are two control output modules.

3. The frequency conversion controller for a cold dryer according to claim 1, characterized in that: The low-voltage power supply module is a power supply module with a sampling function.

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