CN210663548U

CN210663548U - Comprehensive intelligent defrosting device for refrigeration house

Info

Publication number: CN210663548U
Application number: CN201921797890.8U
Authority: CN
Inventors: 李苏
Original assignee: Jiangsu Elite Heating And Cooling Equipment Engineering Co Ltd
Current assignee: Jiangsu Elite Heating And Cooling Equipment Engineering Co Ltd
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-06-02
Anticipated expiration: 2029-10-24

Abstract

The utility model provides a comprehensive intelligent defrosting device for a refrigeration house, which comprises a cold air blower in the refrigeration house, and a blower, a refrigerant liquid inlet pipe, a refrigerant air return pipe and a fin heat exchanger which are arranged on the cold air blower; an air return temperature sensor and an air return pressure sensor are arranged on a refrigerant air return pipe of the air cooler; air pressure difference switches are arranged at the front air inlet and the rear air outlet of the finned heat exchanger; a humidity sensor is arranged in the refrigeration house; a defrosting heating wire is arranged below the fin heat exchanger; the defrosting heating wire is connected with the comprehensive controller through the defrosting heating wire switch. The utility model discloses reach the frost and then change, the rationality purpose of frost cycle and time is not changed and changes to the frost, has realized intelligent defrosting operation, shortens the time of changing the frost greatly, reduces the power consumption of changing the frost, has the effect of energy saving and emission reduction and low carbon environmental protection.

Description

Comprehensive intelligent defrosting device for refrigeration house

Technical Field

The utility model relates to a frost field of changing of freezer, concretely relates to synthesize intelligent freezer and change white device.

Background

At present, a defrosting mode of a refrigeration house is defrosting at fixed time and fixed period, namely a defrosting period and defrosting time are set for an air cooler of the refrigeration house, when the defrosting period is reached, a system enters a defrosting mode, the defrosting time is calculated, the defrosting time is up and meets defrosting conditions, and the air cooler is just exited, so that the defrosting mode is single or insufficient, no matter whether a heat exchanger of the air cooler has frost or frost, defrosting is achieved when the set period is reached, the air cooler is heated to exit the set temperature or the defrosting time is exited when the set temperature is reached, the defrosting time is longer, the power consumption is higher, the condition of defrosting without frost can be caused in some states, and the refrigeration house defrosting is a heating process, the refrigeration house is cooling equipment, so that the energy consumption waste is serious in a simple defrosting mode.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a synthesize intelligent freezer defrosting device. The utility model provides a simple singleness of present conventional defrosting mode, erroneous judgement, can not rely on the manual work according to humidity in the storehouse and air-cooler condition adjustment correction, the problem of consuming time power according to actual parameter automatic adjustment in the storehouse, change the frost cycle and change the frost time, the utility model discloses use the back, change the frost and can realize accurate intellectuality, according to the automatic accurate condition of judging the frosting of acquisition parameter, according to change the frost cycle and change the frost time with change next frost cycle of frost time automatic adjustment, reach and have the frost then change, the rationality purpose of frost cycle and time is not changed and changes the frost, has realized intelligent defrosting operation, shortens the time of changing the frost greatly, reduces the power consumption of changing the frost, has energy saving and emission reduction and low carbon environmental protection's effect.

For realizing the technical purpose, the technical proposal of the utility model is that: a comprehensive intelligent defrosting device for a refrigeration house comprises a cold fan in the refrigeration house, and a fan, a refrigerant liquid inlet pipe, a refrigerant gas return pipe and a fin heat exchanger which are arranged on the cold fan;

an air return temperature sensor and an air return pressure sensor are arranged on a refrigerant air return pipe of the air cooler and are used for measuring air suction pressure and air suction temperature; air pressure difference switches are arranged at the front air inlet and the rear air outlet of the fin heat exchanger and are used for measuring the front air pressure and the rear air pressure of the fin heat exchanger; a humidity sensor is arranged in the cold storage and used for measuring the humidity in the cold storage; a defrosting heating wire is arranged below the fin heat exchanger; set up comprehensive control ware, return air temperature sensor, return air pressure sensor, wind pressure difference switch, humidity transducer pass through the signal line connection comprehensive control ware, the defrosting heater strip is connected through setting up defrosting heater strip switch comprehensive control ware for according to suction pressure, the temperature of breathing in, around the fin heat exchanger wind pressure, the interior humidity data of storehouse, the control defrosting heater strip switch, further control defrosting time and the cycle of defrosting.

Further, the integrated controller adopts a PLC module with the model number of s 7-200.

Further, an analog quantity input module is arranged to be connected with the PLC module; the air return temperature sensor, the air return pressure sensor and the humidity sensor are connected with the PLC module through an analog quantity input module, and the air pressure difference switch is connected with an input/output interface of the PLC module as a switching value.

Further, the analog input module adopts an analog input module with the model of EM AR 04.

Furthermore, the return air temperature sensor adopts a thermistor type temperature sensor, the return air pressure sensor adopts one of a semiconductor piezoresistor type air inlet pressure sensor or a capacitance type air inlet pressure sensor, and the humidity sensor adopts one of a humidity-sensitive resistor type humidity sensor or a humidity-sensitive capacitance type humidity sensor.

The beneficial effects of the utility model reside in that:

the utility model provides a simple singleness of present conventional defrosting mode, erroneous judgement, can not rely on the manual work according to humidity in the storehouse and air-cooler condition adjustment correction, the problem of consuming time power according to actual parameter automatic adjustment in the storehouse, change the frost cycle and change the frost time, the utility model discloses use the back, change the frost and can realize accurate intellectuality, according to the automatic accurate condition of judging the frosting of acquisition parameter, according to change the frost cycle and change the frost time with change next frost cycle of frost time automatic adjustment, reach and have the frost then change, the rationality purpose of frost cycle and time is not changed and changes the frost, has realized intelligent defrosting operation, shortens the time of changing the frost greatly, reduces the power consumption of changing the frost, has energy saving and emission reduction and low carbon environmental protection's effect.

Drawings

Fig. 1 is a schematic view of the main structure of the present invention in fig. 1;

fig. 2 is a top view of the present invention;

fig. 3 is a side view of the present invention;

fig. 4 is a schematic view of the modular principle of the present invention;

FIG. 5 is a schematic wiring diagram of the wind pressure difference switch of the present invention;

fig. 6 is a wiring diagram of the return air temperature sensor, the return air pressure sensor and the humidity sensor of the present invention.

In the figure: 1. an air cooler; 2. a wind pressure difference switch; 3. a signal line; 4. a comprehensive controller; 5. a fan; 6. a humidity sensor; 7. defrosting heating wires; 8. a refrigerant inlet pipe; 9. a refrigerant return pipe; 10. a finned heat exchanger; 11. a return air pressure sensor; 12. return air temperature sensor.

Detailed Description

The technical solution of the present invention will be clearly and completely described below.

A comprehensive intelligent refrigerator defrosting device is shown in figures 1-3 and comprises a cold air blower 1 in a refrigerator, and a blower 5, a refrigerant liquid inlet pipe 8, a refrigerant air return pipe 9 and a fin heat exchanger 10 which are arranged on the cold air blower;

an air return temperature sensor 12 and an air return pressure sensor 11 are arranged on a refrigerant air return pipe of the air cooler and used for measuring air suction pressure and air suction temperature; air pressure difference switches 2 are arranged at the front air inlet and the rear air outlet of the fin heat exchanger and are used for measuring the front air pressure and the rear air pressure of the fin heat exchanger; a humidity sensor 6 is arranged in the cold storage and used for measuring the humidity in the cold storage; a defrosting heating wire 7 is arranged below the fin heat exchanger; as shown in fig. 3 and 4, set up comprehensive control ware 4, return air temperature sensor, return air pressure sensor, wind pressure difference switch, humidity transducer pass through signal line 3 and connect comprehensive control ware, the heating wire that defrosts is connected through setting up defrosting heating wire switch comprehensive control ware for according to suction pressure, the temperature of breathing in, wind pressure around the fin heat exchanger, the interior humidity data of storehouse, control defrosting heating wire switch, further control defrosting time and defrosting cycle. The integrated controller judges the frosting degree of the evaporator through a control logic and a pressure difference switch of the air outlet, judges whether the system is in a reliable operation range according to the change of the evaporation pressure of the return air pressure and the return air temperature value, and judges whether the temperature in the warehouse is suitable for defrosting operation according to the detection of the temperature sensor in the warehouse. The three conditions are the basis for judging whether defrosting can be carried out.

Further, as shown in fig. 6, an analog input module is arranged to be connected to the PLC module; the return air temperature sensor t1, the return air pressure sensor t2 and the humidity sensor t3 are connected with the PLC module through an analog input module, as shown in fig. 5, the wind pressure difference switch K1 is connected with an input/output interface of the PLC module as a switching value.

Further, as shown in fig. 6, the analog input module is an analog input module with a model of EM AR 04.

The utility model discloses an implement the step as follows:

when the air cooler starts refrigeration, the refrigeration house starts to cool, air passes through the finned heat exchanger and forms pressure at an inlet pipe opening and an outlet pipe opening of the air pressure difference switch, the air pressure difference switch is opened at the moment, a defrosting signal is not transmitted to the integrated controller, when the finned heat exchanger frosts to a certain degree, the air quantity passing through the finned heat exchanger is gradually reduced, when the air pressure difference switch is lowered to a set value of the air pressure difference switch, the contact of the air pressure difference switch is disconnected, a switch signal is output to the controller, and meanwhile, the controller detects that the temperature of a refrigerant return air pipe also reaches the set value of defrosting, and the refrigerant return air.

It should be noted that, at this time, if dust or foreign matter is adsorbed, a misjudgment is generated, so the return air temperature and pressure of the system and the humidity in the warehouse are also collected, the defrosting mode is entered only when the defrosting conditions are all met, and when the temperature of the fin heat exchanger reaches a defrosting exit set value, defrosting is stopped, and a defrosting cycle is completed.

If the defrosting time is too short or too long, the setting of the defrosting period is unreasonable, the integrated controller analyzes and corrects the collected data, and the defrosting period is automatically adjusted, so that the defrosting state is reached and the defrosting time is reasonably distributed when defrosting is carried out next time. Specifically, the integrated controller memorizes the air suction pressure, the air suction temperature, the defrosting period, the defrosting time, the front and rear air pressure of the finned heat exchanger, the humidity in the refrigerator and the like during defrosting in the previous time, if the deviation exists with the set parameters of the controller, the next defrosting period and time are automatically adjusted, for example, during defrosting in the previous time, the air pressure difference is small, the defrosting time is short, the air suction pressure and the air suction temperature are higher, the next defrosting automatically increases the defrosting period time and the defrosting time, otherwise, the defrosting period is automatically reduced, and the specifically increasing and reducing time is related to the actual acquisition parameters.

The utility model discloses change the frost and gather the signal and pass through the sensor and give comprehensive controller, comprehensive controller carries out analysis processes and memory through the programming procedure, establishes logical relation, has memory, analysis, correction function, and automatic correction is gone up to the data of the frost of the previous time, makes the next frost process of changing more reasonable.

For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. A comprehensive intelligent defrosting device for a refrigeration house comprises a cold fan in the refrigeration house, and a fan, a refrigerant liquid inlet pipe, a refrigerant gas return pipe and a fin heat exchanger which are arranged on the cold fan; the method is characterized in that: an air return temperature sensor and an air return pressure sensor are arranged on a refrigerant air return pipe of the air cooler and are used for measuring air suction pressure and air suction temperature; air pressure difference switches are arranged at the front air inlet and the rear air outlet of the fin heat exchanger and are used for measuring the front air pressure and the rear air pressure of the fin heat exchanger; a humidity sensor is arranged in the cold storage and used for measuring the humidity in the cold storage; a defrosting heating wire is arranged below the fin heat exchanger; set up comprehensive control ware, return air temperature sensor, return air pressure sensor, wind pressure difference switch, humidity transducer pass through the signal line connection comprehensive control ware, the defrosting heater strip is connected through setting up defrosting heater strip switch comprehensive control ware for according to suction pressure, the temperature of breathing in, around the fin heat exchanger wind pressure, the interior humidity data of storehouse, the control defrosting heater strip switch, further control defrosting time and the cycle of defrosting.

2. The comprehensive intelligent refrigeration house defrosting device according to claim 1, wherein the comprehensive controller adopts a PLC module with the model number of s 7-200.

3. The comprehensive intelligent refrigeration house defrosting device according to claim 2, characterized in that an analog input module is arranged to be connected with the PLC module; the air return temperature sensor, the air return pressure sensor and the humidity sensor are connected with the PLC module through an analog quantity input module, and the air pressure difference switch is connected with an input/output interface of the PLC module as a switching value.

4. The comprehensive intelligent refrigeration house defrosting device according to claim 3, wherein the analog input module is an analog input module with the model number of EM AR 04.

5. The comprehensive intelligent refrigeration house defrosting device according to claim 4, wherein the return air temperature sensor is a thermistor type temperature sensor, the return air pressure sensor is a semiconductor piezoresistor type air inlet pressure sensor or a capacitor type air inlet pressure sensor, and the humidity sensor is a humidity-sensitive resistor type humidity sensor or a humidity-sensitive capacitor type humidity sensor.