KR102135670B1 - An Apparatus for Controlling an Operation of a Refrigerating Vehicle Based on Detecting a Temperature and a Pressure and the Method for the Same - Google Patents

Abstract

The present invention relates to an operation control device and a method for operating a refrigeration vehicle based on temperature and pressure detection, and specifically, a refrigeration based on temperature and pressure detection to improve refrigeration efficiency by operating a condenser and an evaporator by independent driving motors. Vehicle operation control device relates to a method. A device for controlling operation of a refrigeration vehicle based on temperature and pressure detection and a method thereof include a first control unit 113 for controlling the operation of the condenser 11; A second control unit 133 that regulates the operation of the evaporator 13; A sensor module 14 for processing state information of a refrigerant flowing into or out of the expansion valve 12; And a main control module 15 that regulates the overall operation based on the information processed by the sensor module 14, wherein the condenser 11 and the evaporator 13 are common parameters transmitted from the sensor module 14 Based on the temperature and pressure detection, characterized in that it operates independently of the operation control device of the refrigeration vehicle.

Description

An Apparatus for Controlling an Operation of a Refrigerating Vehicle Based on Detecting a Temperature and a Pressure and the Method for the Same}

The present invention relates to an operation control device and a method for operating a refrigeration vehicle based on temperature and pressure detection, and specifically, a refrigeration based on temperature and pressure detection to improve refrigeration efficiency by operating a condenser and an evaporator by independent driving motors. Vehicle operation control device relates to a method.

For the efficient operation of the refrigeration or refrigeration system for a refrigeration truck, it is necessary to properly adjust the operating level of the condenser, expansion valve and evaporator according to the power supply method, the thermal insulation structure of the truck and the condition of the refrigeration space. For example, it is advantageous that the power for the operation of the refrigeration system is supplied by an independent battery module such that the vehicle remains frozen while stationary. In addition, since different external environments may be affected at different locations in the freezing space, it is necessary to have an insulating structure that minimizes the influence of the external environment. In addition, it is necessary to precisely control the flow of the refrigerant to maintain a predetermined temperature range in an environment in which the temperature is changed, and for this, an electronic control valve may be used. WO 2002/14724 discloses an electric switching valve that can be applied to a refrigeration or cooling system according to the high performance of a refrigerator. In addition, Patent Publication No. 10-2005-0099799 discloses a control method of an electromagnetic expansion valve in a refrigeration cycle that determines a change value of the opening degree of an electromagnetic expansion valve in consideration of both the suction superheat of the compressor and the discharge temperature of the compressor. The operation of the condenser and the evaporator can be controlled in conjunction with the expansion valve, with the control of the expansion valve for rapid response to temperature changes in the freezing space. However, when the operation is performed in relation to each other as described above, the occurrence of the effect according to the operation may be delayed, and accordingly, the time to quickly recover to a predetermined temperature range of the freezing space may be delayed. It is therefore advantageous to detect the condition of the refrigerant in the refrigeration space or in a defined area and based thereon to independently drive the condenser, expansion valve and evaporator for the operation of the refrigeration system. However, the prior art does not disclose such a technique.

The present invention is intended to solve the problems of the prior art and has the following objects.

Prior art 1: WO 2002/14724 (Saginomiya Seisakusho, Ltd. released on February 21, 2002) Electric solenoid valve and refrigeration cycle device for freezer and refrigerator Prior Art 2: Patent Publication No. 10-2005-0099799 (LG Electronics Co., Ltd., published on October 17, 2005) Electronic expansion valve control method of refrigeration cycle device

An object of the present invention is the operation of a refrigeration vehicle based on temperature and pressure detection to improve the refrigeration efficiency by independently controlling the operation of the condenser, expansion valve and evaporator by detecting the condition of the refrigeration space and the condition of the refrigerant in a predetermined section. It is to provide a control device and method.

According to a preferred embodiment of the present invention, a device for controlling operation of a refrigeration vehicle based on temperature and pressure detection and a method thereof include a first control unit for controlling operation of a condenser; A second control unit that regulates the operation of the evaporator; A sensor module that processes status information of a refrigerant flowing into or out of the expansion valve; And a main control module that regulates the overall operation based on the information processed by the sensor module, and the condenser and evaporator are operated independently based on common parameters transmitted from the sensor module.

According to another suitable embodiment of the invention, the common parameter is the flow rate, and the operation of the circulation fan is respectively controlled by the first control unit and the second control unit.

According to another suitable embodiment of the invention, selecting a common parameter that controls the operation of the condenser, expansion valve and evaporator; Detecting state information of the condenser and the evaporator, and obtaining information of common parameters; Operating a fan of the condenser and evaporator based on the detected state information and information of the obtained common parameters; And adjusting the flow of the expansion valve, wherein the fans of the condenser and the evaporator are independently operated, and the flow of the expansion valve is controlled by adjusting the diameter of the circular cross-sectional area.

The operation control device of the refrigeration vehicle based on temperature and pressure detection according to the present invention enables refrigeration efficiency to be improved by allowing the condenser, expansion valve, and evaporator to operate independently based on common parameters. In addition, the control method according to the present invention can quickly respond to the temperature change of the freezing space by independently setting the operating conditions of the evaporator according to the state of the freezing space.

1 shows an embodiment of an operation control device for a refrigeration vehicle based on temperature and pressure detection according to the present invention.
Figure 2 shows an embodiment of a process in which the operation of the condenser is independently adjusted in the operation control device of a refrigeration vehicle according to the present invention.
Figure 3 shows an embodiment of the flow control structure of the electromagnetic expansion valve in the operation control device of a refrigeration vehicle according to the present invention.
Figure 4 shows an embodiment of a process in which the operation of the evaporator is controlled in the operation control device of a refrigeration vehicle according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the embodiments presented in the accompanying drawings, but the embodiments are intended for a clear understanding of the present invention and the present invention is not limited thereto. In the following description, components having the same reference numerals in different drawings have similar functions, and are not described repeatedly unless necessary for understanding of the invention, and well-known components are briefly described or omitted, but the present invention It should not be understood as being excluded from the embodiment.

1 shows an embodiment of an operation control device for a refrigeration vehicle based on temperature and pressure detection according to the present invention.

Referring to FIG. 1, an operation control device of a refrigeration vehicle that controls a refrigeration state of a refrigeration space of a refrigeration tower vehicle includes a first control unit 113 that controls operation of the condenser 11; A second control unit 133 that regulates the operation of the evaporator 13; A sensor module 14 for processing state information of a refrigerant flowing into or out of the expansion valve 12; And a main control module 15 that regulates the overall operation based on the information processed by the sensor module 14, wherein the condenser 11 and the evaporator 13 are common parameters transmitted from the sensor module 14 It works independently on the basis of.

The operation control device of a refrigeration vehicle may be applied to a refrigeration vehicle, a refrigeration truck, or a similar refrigeration system, but is not limited thereto, and may be applied to various refrigeration or refrigeration systems. The refrigeration system is based on heat exchange due to liquefaction and vaporization of the refrigerant, and the temperature of the freezing space can be appropriately adjusted by appropriately controlling the flow and phase change of the refrigerant.

As the refrigerant flows into the condenser 11 and the refrigerant flows through the induction pipe, the refrigerant can be cooled to be in a high pressure liquid state and heat exchanged during the condensation process. The condenser fan 111 can be operated so that heat exchange is efficiently performed, and the operation of the condenser fan 111 can be controlled by the first control unit 113. The condenser fan 111 may have a function of adjusting the air circulation speed around the condenser, and operation may be adjusted based on information transmitted from the first state detection unit CP1 that detects the state of the refrigerant. Specifically, the amount, temperature, or pressure of the refrigerant flowing into the condenser 11 or discharged from the condenser 11 may be detected and transmitted to the sensor module 14 by the first state detection unit CP1. The sensor module 14 may extract information necessary for the operation of the condenser fan 111 from the transmitted detection information and transmit it to the first control unit 113, and the first control unit 113 is based on the transmitted information The operation level of the first driving motor 112 may be adjusted to control the operation of the condenser fan 111. Thus, the circulation of the refrigerant is efficiently made by operating based on the state information of the refrigerant in the operating state of the condenser fan 111.

The refrigerant condensed in the condenser 11 may be transferred to the expansion valve 12, and the expansion valve 12 may be, for example, a temperature-sensitive method or an electronic type, and preferably an electronic expansion valve. In addition, the flow rate is adjusted in the expansion valve 12 so that the refrigerant supplied to the evaporator 13 is vaporized to cool the cooling space. The state of the refrigerant flowing into the evaporator 13 may be detected by the second state detection unit CP2, and the detected information may be transmitted to the sensor module 14 for processing. As the internal air of the freezing space is circulated, the internal temperature of the freezing space may be controlled, and a circulation fan 131 operated by the circulation motor 132 may be installed for air circulation in the freezing space. Whether the circulation fan 131 is operated may be controlled by the second control unit 133, and the operation of the circulation fan 131 may be adjusted based on the state of the refrigerant flowing in or the state of the freezing space. The state of the refrigerant flowing into the evaporator 13 may be, for example, temperature, pressure or flow rate, and the detected state of the refrigerant may be transmitted to the sensor module 14. In addition, the sensor module 14 may extract information from the operation of the circulation fan 131 and transmit it to the second control unit 133. The second control unit 133 may control the operation of the circulation fan 131 by adjusting the operation level of the circulation motor 132 based on the transmitted information. The circulation fan 131 may be operated independently of the operation of the condenser fan 111, and each operation may be controlled by the first control unit 113 and the second control unit 133. The information detected by the condenser 11, the expansion valve 12 and the evaporator 13 may be transmitted to the sensor module 14, and the sensor module 14 transmits the detected information to the first control unit 113 and 2 can be transmitted to the control unit 133, and the operating levels of the condenser fan 111 and the circulation fan 131, respectively, can be determined based on the transmitted information. In addition, information detected by the sensor module 14 may be transmitted to the main control module 15. The main control module 15 generates the first operation data 161 to determine the operation level of the condenser fan 111 and the second operation data 162 to determine the operation level of the circulation fan 131, respectively. It can be transmitted to the control unit 113 and the second control unit 133. In addition, an operation factor extraction unit 141 is installed in the sensor module 14 to extract information about common parameters that determine the operating levels of the condenser fan 111, the circulation fan 131, and the expansion valve 12. have. For example, the common parameter may be the flow rate of the refrigerant, and the flow of the refrigerant in the condenser 11, the expansion valve 12, and the evaporator 13 is detected, respectively, and the first control unit 113 and the second control unit (133). In this predetermined section, the flow rate of the refrigerant becomes a common parameter, and operations of the condenser 11, the expansion valve 12, and the evaporator 13 may be related to each other. And the flow rate of the refrigerant may be the same or different from the condenser 11, the expansion valve 12 and the evaporator 13, and the condenser fan 111 and the circulation fan 131 in the condenser 11 and the evaporator 13 By controlling the operation, the refrigerant is guided to the evaporator 13 under a predetermined condition so that the cooling space is efficiently cooled. Specifically, by adjusting the operating levels of the condenser fan 11 and the circulation fan 131 according to the flow rate of the refrigerant, the refrigerant flows into the evaporator 13 under predetermined temperature and pressure conditions, and is circulated in the cooling space.

Adjustment of the operating level of the condenser fan 111, the circulation fan 131 and the flow level of the expansion valve 12 can be made based on various common parameters and is not limited to the practice presented.

Figure 2 shows an embodiment of a process in which the operation of the condenser is independently adjusted in the operation control device of a refrigeration vehicle according to the present invention.

Referring to Figure 2, the refrigerant compressed in the compressor can be guided to the condenser 11 through the inlet conduit 211, condensed and cooled inside the condenser 11 to the expansion valve through the discharge conduit 212 Can be induced. First and second temperature sensors CS1 and CS2 are respectively installed in the inlet conduit 211 and the outlet conduit 212 to measure the temperature of the refrigerant that is introduced and discharged. In addition, a contact detection unit 22 for detecting the surface condition of the evaporator 11 may be installed, and a refrigerant flow line inside the evaporator 11 or an external temperature or pressure adjacent thereto may be detected by the contact detection unit 22. It can be sent to the detection processing module 24. The touch detection unit 22 may generate an operation start signal to start the operation of the condenser fan 111. For example, when the external temperature of the condenser detected in the contact detection unit 22 reaches a predetermined level, an operation start signal may be transmitted to the detection processing module 24. In addition, when the level is below a certain level, the stop signal may be transmitted to the detection processing module 24. If necessary, the flow rate of the refrigerant flowing into the evaporator 11 can be detected by the flow rate detection unit 23 and transmitted to the detection processing module 24. The detection processing module 24 may transmit a flow rate change or an external temperature change to the first control unit 113. The first control unit 113 may determine the operating level of the first drive motor 112 based on the transmitted information or the operating time of the condenser fan 111. By efficiently operating the condenser fan 111 as described above, power consumption according to the operation of the compressor and the evaporator is reduced, and a response to a temperature change is quickly achieved.

Figure 3 shows an embodiment of the flow control structure of the electromagnetic expansion valve in the operation control device of a refrigeration vehicle according to the present invention.

3, the expansion valve 12 may be an electronic expansion valve, for example, the expansion valve 12 may include a valve body 31; An adjustment motor comprising stators 321a and 321b and rotors 331a and 331b disposed inside the valve body 31; A rotation control unit 35 for adjusting the rotation angle of the adjustment motor; And an adjustment shaft 341 connected to the adjustment motor. And it may include a valve 34 for adjusting the flow level by the control shaft 341. The refrigerant may be flowed through the refrigerant path CP, and the flow level of the refrigerant path CP may be controlled by the regulating motor. The amount of refrigerant flowing through the refrigerant path CP may be detected by the flow sensor FS and transmitted to the sensor module described in FIG. 1. The amount of refrigerant flowing through the refrigerant path CP may be achieved by adjusting the diameter of the circular cross-sectional area of the refrigerant path CP. Specifically, the amount of the refrigerant flowing through the refrigerant path CP may be made in such a way that the diameter of the valve 34 is adjusted from the outside to the inside, so that the amount of the refrigerant can be precisely controlled. The amount of refrigerant supplied from the expansion valve 12 to the evaporator can be adjusted in various ways and is not limited to the presented embodiment.

Figure 4 shows an embodiment of a process in which the operation of the evaporator is controlled in the operation control device of a refrigeration vehicle according to the present invention.

Referring to FIG. 4, the refrigerant may be vaporized by flowing into the evaporator through the refrigerant line CL, and a flow rate sensor FS may be installed in the refrigerant line CL to detect the amount of refrigerant flowing into the evaporator. have. The refrigerant may be vaporized inside the evaporator, and a circulation fan may be disposed inside the evaporator. For example, the evaporator is a case 41 having a rectangular box shape or a similar shape as a whole; A working body 43 formed inside the case 41; A circulation outlet 42 formed above the working body 43; And a circulation inlet 44 formed under the working body 43. A refrigerant induction pipe and a circulation fan may be disposed inside the working body 43, and the first, second and third detection sensors DS1 and DS2 are respectively located on the surface of the working body 43, the circulation outlet 42, and the freezing space, respectively. , DS3) may be installed, and temperature or pressure may be detected by the first, second, and third detection sensors DS1, DS2, and DS3. For example, the temperature of the working body 43 may be detected by the first detection sensor DS1, and the circulation fan may be basically adjusted based on the temperature of the working body 43. Temperature and pressure may be detected by the second and third detection sensors DS2 and DS3. Information detected by the first, second and third detection sensors DS1, DS2, and DS3 may be transmitted to the temperature/pressure processing module 46. The temperature/pressure processing module 46 may periodically acquire detection information, and operate the fan driving module 47 based on the obtained information. The circulation fan can be operated by the fan drive module 47, and the operation level of the circulation fan can be basically determined based on the surface temperature of the operation body 43. In addition, the operating time of the circulation fan may be operated based on the temperature change and pressure change detected by the second and third detection sensors DS2 and DS3. For example, the operation of the circulation fan may be started when the temperature detected by the first detection sensor DS1 reaches a predetermined range. Thereafter, the operation level may be determined according to the temperature and pressure change detected by the second or third detection sensor DS2 or DS3, and may be operated in a feedback method in which the operation level decreases as the pressure and temperature change decreases. Also, the first detection sensor DS1 may generate an operation start signal or an operation stop signal, like the touch detection sensor described in FIG. 2. Various locations of temperature or pressure can be detected and transmitted to the temperature/pressure processing module 46 and are not limited to the presented embodiment.

As described above, the condenser fan and the circulation fan can be operated independently according to respective temperature or pressure conditions, and the operating range can be set based on the flow level of the refrigerant. The method for controlling the refrigeration state of the refrigeration truck according to the present invention as described above includes: selecting a common parameter for controlling the operation of a condenser, an expansion valve, and an evaporator; Detecting state information of the condenser and the evaporator, and obtaining information of common parameters; Operating a fan of the condenser and evaporator based on the detected state information and information of the obtained common parameters; And adjusting the flow of the expansion valve, wherein the fans of the condenser and the evaporator are independently operated, and the flow of the expansion valve is controlled by adjusting the diameter of the circular cross-sectional area. The common parameter can be the amount of flow of refrigerant, and the amount of flow of refrigerant can be measured in a certain section. For example, the flow amount of the refrigerant may be measured in a condenser, an evaporator, and an expansion valve, and a refrigeration level in a freezing space according to the flow amount of the refrigerant may be predetermined. In addition, the condenser fan and the circulating fan can be operated independently in the condenser and the evaporator so that the refrigerant flows in a predetermined temperature range in the flow detection section. The temperature control of the refrigerant and thus the refrigeration control of the refrigeration space can be achieved in various ways and is not limited to the presented embodiments.

The operation control device of the refrigeration vehicle based on temperature and pressure detection according to the present invention enables refrigeration efficiency to be improved by allowing the condenser, expansion valve, and evaporator to operate independently based on common parameters. In addition, the control method according to the present invention can quickly respond to the temperature change of the freezing space by independently setting the operating conditions of the evaporator according to the state of the freezing space.

The present invention has been described in detail with reference to the presented embodiments, but those skilled in the art will be able to make various modifications and modified inventions without departing from the technical spirit of the present invention with reference to the presented embodiments. . The present invention is not limited by such modified and modified inventions, but is limited by the appended claims.

11: Condenser 12: Expansion valve
13: evaporator 14: sensor module
15: main control module 22: contact detection unit
23: flow detection unit 24: detection processing module
31: valve body 34: valve
35: rotation control unit 41: case
42: circulation outlet 43: working body
44: circulation inlet 46: temperature/pressure treatment module
47: fan drive module 111: condenser fan
112: first drive motor 113: first control unit
131: circulation fan 132: circulation motor
133: second control unit 141: operating factor extraction unit
161: first operation data 162: second operation data
211: inlet conduit 212: outlet conduit
321a, 321b: stator 331a, 331b: rotor
341: Adjustable shaft CL: refrigerant line
CP: refrigerant path CP1: first condition detection unit
CP2: 2nd status detection unit CS1, CS2: 1st, 2nd temperature sensor
DS1, DS2, DS3: 1, 2, 3 detection sensors
FS: flow sensor

Claims (3)

In the operation control device of a refrigeration vehicle for adjusting the refrigeration state of the freezing space of the refrigeration tower vehicle,
A first control unit 113 that controls the operation of the condenser 11;
A second control unit 133 that regulates the operation of the evaporator 13;
A sensor module 14 for processing state information of a refrigerant flowing into or out of the expansion valve 12; And
It includes a main control module 15 for adjusting the overall operation based on the information processed by the sensor module 14,
The condenser 11 and evaporator 13 are operated independently based on common parameters transmitted from the sensor module 14,
The common parameter is a flow rate, and the temperature and pressure detection-based refrigeration vehicle characterized in that the operation of the circulation fans 111 and 131 is controlled by the first control unit 113 and the second control unit 133, respectively. Operation control device. delete In the method of controlling the frozen state of the frozen top car,
Selecting common parameters that control the operation of the condenser, expansion valve and evaporator;
Detecting state information of the condenser and the evaporator, and obtaining information of common parameters;
Operating a fan of the condenser and evaporator based on the detected state information and information of the obtained common parameters; And
Adjusting the flow of the expansion valve,
The condenser and the fan of the evaporator is independently controlled operation, the flow of the expansion valve is controlled by controlling the frozen state, characterized in that by adjusting the diameter of the circular cross-sectional area.

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