KR200435221Y1 - Digital multi pressure switch for controlling refrigerator - Google Patents

Abstract

Disclosed is a digital multiple pressure switch capable of measuring and simultaneously processing a refrigerant pressure of a refrigerating device to control the operation of a refrigerating device, to generate an alarm, and to control a cooling fan. To this end, there is provided a digital multiple pressure switch for controlling a refrigerating appliance, which is directly attached to the main body housing and has two or more connection ports incorporating a pressure sensor, a signal processing unit, a control unit, and an information display unit, and a main unit embedded in the main body housing. . By measuring the refrigerant pressure of the refrigerating device digitally with a pressure sensor, the accuracy, reliability and reproducibility of the measurement results are secured. And the main component is formed in one digital multi-pressure switch, by controlling the operation of two or more freezer units refrigeration machine operation, generating an alarm, and controlling the cooling fan by one digital multi-pressure switch at the same time, the structure Has the effect of simple and economical and user convenience.

Pressure switch, digital pressure switch, refrigeration machine pressure control switch, oil pressure control switch, cooling fan control switch

Description

DIGITAL MULTI PRESSURE SWITCH FOR CONTROLLING REFRIGERATOR}

1 is a front view of a digital multiple pressure switch according to an embodiment of the present invention

2 is a side view of a digital multiple pressure switch according to an embodiment of the present invention

3 is a system configuration diagram of a digital multiple pressure switch according to an embodiment of the present invention

* Explanation of symbols for the main parts of the drawings

10: connection port 15; Pressure sensor

20: input means 30: main body

32: signal processor 34: controller

36: information display section 38: power storage section

The present invention relates to a digital pressure switch capable of measuring the refrigerant pressure of the refrigeration machine to perform the operation control and alarm output of the refrigeration machine and the control of the cooling fan. Specifically, the refrigerant pressure of the refrigeration machine is measured by a pressure sensor. The digital processing ensures the accuracy, reliability and reproducibility of the measurement results. By measuring the refrigerant pressure of two or more refrigeration units, the operation control of the refrigerator, alarm output and control of the cooling fan can be performed simultaneously with one digital multi-pressure switch. The present invention relates to a digital multiple pressure switch for controlling a refrigeration machine with improved economy and convenience.

In general, a refrigerating device includes an ejector for compressing and discharging a refrigerant at a high pressure, a condenser for cooling and condensing the discharged high temperature and high pressure refrigerant with a cooling fan, and expanding the condensed refrigerant with an expansion valve to store the refrigerant at a low temperature and low pressure. Evaporator and other accessories for evaporating and circulating the low temperature low pressure refrigerant back to the compressor.

A means for mechanically measuring the refrigerant pressure and a pressure gauge indicating the refrigerant pressure by rotating the needle are formed between the refrigerant discharge port of the compressor of the refrigerator and the condenser, that is, the high pressure portion, and the abnormal high pressure of the high pressure portion based on the measured refrigerant pressure. A control alarm switch and a pressure switch for controlling the operation of the cooling fan are formed. Separately, a means and a pressure gauge for mechanically measuring the refrigerant pressure are formed between the evaporator and the refrigerant inlet of the compressor, that is, the low pressure portion, and a pressure switch for controlling the operation of the refrigerator based on the measured refrigerant pressure. In addition, the oil conveying path selectively provided according to the refrigerating machine is also provided with means for measuring the oil pressure mechanically, an abnormal pressure control alarm switch, and a pressure gauge indicating the measured oil pressure.

The conventional refrigerant pressure measuring means mechanically measures the refrigerant pressure and the oil pressure using bellows and bimetal, and indicates the measurement result by indicating the scale by mechanically rotating the needle in the pressure gauge, There is a problem that reliability and reproducibility are lowered.

In addition, by operating the limit switch by the deviation caused by the contraction and expansion of the bellows, the brondon tube, the refrigeration machine is operated, the spring tension is changed by the movement of the scale of the display window, the stop of the freezer at the pressure switch, and switching the cooling fan In this case, an error occurs between the reference value of the refrigerant pressure and the measurement value of the refrigerant pressure due to the repeated mechanical operation of the pressure switch, which leads to an error in the operation and shutdown of the refrigerator, and at the same time, it is easy to damage the refrigerator. have.

In particular, the conventional refrigerant pressure measuring system has a refrigerant pressure measuring means, a pressure gauge and a pressure switch separately formed in the high pressure portion, the low pressure portion, and the optional oil transfer path of the refrigerating machine, and the overall system structure is complicated and the equipment cost is excessively required. There is a problem that the operation is very inconvenient.

In order to solve these problems, Korean Utility Model Publication No. 0390963 (August 28, 2005) discloses a device for measuring the pressure of the refrigerant of the refrigerating device with a sensor and controlling the speed of the cooling fan based on the measurement result. A refrigeration apparatus is disclosed.

However, such a conventional refrigeration unit is a method of controlling the speed of the cooling fan in proportion to the refrigerant pressure measured by using an expensive inverter (off-the-shelf inverter), which is cumbersome to install, requires a high level of operating technology, and is difficult to install in a small shop. There is a problem of economic burden.

In addition, since only very limited information is provided on the display window providing information to the user, there is a problem in that the pressure of the refrigerant cannot be seen at a glance. That is, only the rotation speed of the fan motor, that is, the frequency is displayed on the display window, and when it is desired to check the pressure of the refrigerant, it is difficult to enter the setting mode and check the respective selected pressures. Therefore, the amount of information provided at one time is limited, there is a problem that can not effectively grasp the state of the refrigerator to cope with.

In addition, in this case, the frequency is reduced from 60 Hz to 50 Hz in order to reduce the noise, but the noise is reduced, but because the heat loss is reduced, the cooling function of the refrigerant is deteriorated. In addition, there is a lack of a function of converting the refrigerant pressure measured in the refrigerating unit or converting the temperature of the refrigerant in response to the unit converted pressure, so that an advanced technician must receive repetitive technical guidance. There is a problem that is very troublesome and inconvenient.

Therefore, the object of the present invention is to measure the refrigerant pressure, oil pressure and water pressure of the refrigerating machine by the pressure sensor to digital processing, and to control the operation of the refrigerating machine by simultaneously processing the measurement results in one digital multiple device, In addition to controlling the fan, it is to provide a digital multiple pressure switch for controlling the refrigeration machine to generate an alarm when an abnormal condition occurs.

In order to achieve the above object of the present invention, a digital multiple pressure switch for controlling a refrigerator according to an embodiment of the present invention is a) two or more connection ports built-in pressure sensor, directly attached to the main body housing; And b) a signal processor for amplifying the pressure information of the refrigerating device transmitted from the pressure sensor into an electrical signal and converting the pressure information into a digital signal. Based on the digital signal transmitted from the signal processor, the operation control of the refrigeration machine, the operation control of the cooling fan, and the generation of an alarm are performed, and unit pressure conversion of the pressure measured by the user in a pressure unit arbitrarily selected by the user is performed. A control unit for converting a temperature of a refrigerant corresponding to the unit-converted pressure according to a type of refrigerant used in the refrigerator; And a main body formed in the front side of the main body housing and having an information display unit which is connected to the control unit to indicate operation information of the refrigerating machine, pressure information of the refrigerant, an operating state of the cooling fan, and whether alarm output is provided. Contains wealth.

The main body unit includes a power storage unit for storing the power required to measure the pressure of the refrigerant before the power is applied. In addition, a plurality of connection ports may be formed in the main body housing to simultaneously measure refrigerant pressures of two or more refrigerators, and the controller may digitally adjust the operation control of the refrigerator, the alarm output, and the operating conditions of the cooling fan. It is configured to be. In addition, the main body housing may further include input means for arbitrarily selecting the type of refrigerant and the application unit of the refrigerant pressure of the refrigerating device, and inputting operation, alarm, and operating conditions of the cooling fan.

The digital multi-pressure switch for controlling a refrigeration machine is configured to measure the refrigerant pressure of the freezer by a pressure sensor, while ensuring accuracy, reliability, and reproducibility of the measurement results, and the main components are formed in one digital multi-pressure switch. By measuring the refrigerant pressures of two or more refrigeration units, the functions such as control of the refrigeration unit, alarm generation, and control of the cooling fan can be simultaneously performed with a single digital multi-pressure switch. This is improved.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

1 is a front view of a digital multiple pressure switch according to an embodiment of the present invention, FIG. 2 is a side view of a digital multiple pressure switch according to an embodiment of the present invention, and FIG. The system configuration of the digital multiple pressure switch according to an embodiment is shown.

1 to 3, first, the connection port 10 is formed in the main body housing, the pressure sensor 15 is located inside the connection port. The connection port 10 can be used by fastening a plurality of the main body housing as necessary, it is very excellent in expandability. The connection port 10 is connected to the capillary for pressure measurement installed in the refrigerant transport path, the oil transport path of the refrigerator.

Specifically, a capillary tube is connected between the high pressure connection port 10 for measuring the refrigerant pressure between the refrigerant discharge port and the condenser of the compressor, which is the high pressure portion of the refrigerant transfer path of the refrigerator. In addition, a capillary tube is installed in the low pressure connection port 10 for measuring the low pressure refrigerant pressure between the evaporator, which is the low pressure portion of the refrigerant transport path of the refrigerator, and the refrigerant intake port of the compressor. Separately, the capillary tube is connected to the connection port 10 for measuring pressure in an oil or water transfer path selectively provided according to the refrigerator.

The pressure sensor 15 is built in the connection port 10 installed in the medium pressure refrigerant transfer path, the oil or water transfer path when the high-pressure, low-pressure, two-stage compressor of the refrigerator is used. Because of the ease of installation, it does not take up much volume.

At least one connection port including pressure sensors respectively formed at the high pressure portion and the low pressure portion of the refrigerant transport path of the refrigerating device is formed in the main body housing. It is preferable that a plurality of connection ports 10 are formed in the main body housing so as to simultaneously measure the refrigerant pressures of two or more refrigerators using a digital multiple pressure switch for controlling one refrigerator. The connection port 10 as described above is preferably formed in the lower and rear of the main body housing, as shown in Figure 2 for flexibility of installation and user convenience.

 As described above, the signal processor 32 digitally processes the refrigerant pressure transmitted from the pressure sensor 15 installed in the refrigerant transport path of the refrigerator, and controls the operation of the refrigerator according to the result and outputs an alarm. The main body unit 30 includes a control unit 34 for controlling the operation of the cooling fan and an information display unit 36 connected to the control unit 34 to indicate pressure information of the refrigerant and an operating state of the cooling fan. It is built.

In addition, the main body 30 is provided with a signal processor 32 for amplifying an electrical signal of the pressure information of the refrigerant transmitted from the pressure sensor 15 installed in the refrigerant transport path of the refrigerator and converting the signal into a digital signal.

The signal processor 32 is configured to amplify the electrical signal of the pressure information for the refrigerant or oil transmitted from the pressure sensor 15, and to convert the electrical signal of the amplified pressure information into a signal capable of digital processing.

On the basis of the digital signal of the pressure information transmitted from the signal processor 32, a control unit 34 for controlling the operation control of the refrigerator, the alarm output, the operation of the cooling fan is formed. The controller 34 is configured to digitally control the operation control of the refrigeration machine, the alarm output, the operating conditions of the cooling fan.

In addition, the control unit 34 converts the refrigerant pressure measured by the pressure sensor 15 of the refrigerator unit into a pressure unit arbitrarily selected by the user, and converts the unit pressure according to the type of refrigerant used in the refrigerator unit. It is configured to automatically convert the temperature of the refrigerant corresponding to the.

For example, pressure units such as kgf / cm2, Bar, MPa, and mmhg may be arbitrarily selected to represent the refrigerant pressure measured by the pressure sensor 15, and any specific pressure unit may be automatically selected. The control unit 34 is configured to change and use in units.

On the other hand, each refrigerant has a unique temperature distribution characteristic corresponding to the pressure distribution for each type.

For example, when a certain kind of low pressure refrigerant is at a pressure of 3.5 kgf / cm2, the (R-22 Freon refrigerant) exhibits a temperature of -3.2 ° C, and the high pressure refrigerant is 15.5 kgf / cm2. In the pressure state, the refrigerant exhibits a temperature of 50.2 ° C.

Accordingly, the controller 34 selects the type of the refrigerant charged in the refrigerating device and automatically converts the temperature of the refrigerant based on the selected type of refrigerant and the measured pressure of the refrigerant and displays the information on the information display unit 36. Is composed.

To this end, an input means 20 is formed in the main body housing for arbitrarily selecting the application unit of the refrigerating device, the refrigerant type and the refrigerant pressure, and inputting the operation control of the refrigerating device, the alarm output, and the operating conditions of the cooling fan.

As described above, the input means 20 formed on the front surface of the main body housing and input to the controller 34 may be configured in the form of a button. The user can arbitrarily select the refrigeration machine, the type of refrigerant and the application unit of the refrigerant pressure by operating the buttons and the input unit 20 as described above, and input the operation control of the refrigeration device, the alarm output and the operation condition of the cooling fan. .

In connection with the control unit 34, an information display unit 36 for displaying various types of information such as refrigerant pressure information, operation control information, alarm output information, cooling fan operation state, and the like is formed on the front surface of the main body housing.

The information display unit 36 may provide various types of refrigerant such as refrigerant pressure information, operation control information, operating state of the cooling fan, an application unit of a randomly selected refrigerant, a type of refrigerant and a refrigerant pressure, and operating conditions of the input cooling fan. Present information to the user.

The information display unit 12 is preferable to use a high brightness liquid crystal display (LCD) in terms of providing a variety of information to the user clearly.

In addition, a power storage unit 38 may be additionally formed to store power required to measure and display the pressure of the refrigerant before power is applied to the main body unit 30. The power storage unit 38 is used to measure the pressure of the refrigerant in the non-powered state, mainly the test pressure of the refrigerant before the digital multiple pressure switch is formed in the refrigerator or before the power is applied to the digital multiple pressure switch. It is used to test specific working conditions of the refrigerant pressure measurement such as, or to check the state of the digital multiple pressure switch.

As described above, the digital multi-pressure switch for controlling a refrigerating device has a simple structure since the terminal of the pressure sensor is directly connected to the connection port of the main housing, and the signal processing unit, the control unit and the information display unit, which are main components, are formed together in the main housing. Cost is reduced and user's operation is easy.

Referring specifically to the operation of the digital multiple pressure switch for controlling the refrigerator according to the present invention with reference to one embodiment, first, the user is installed by connecting the digital multiple pressure switch for controlling the refrigerator. That is, the capillary hoses are connected to the connection port of the main housing of the digital multi-pressure switch for controlling the freezer, and the capillary hose is connected to the refrigerant transfer path and the oil transfer path of the freezer.

In addition, if there are two or more freezing devices to be measured and a plurality of connecting ports are formed in the main body housing of the digital multiple pressure switch for controlling the freezing device, the two freezing devices are connected to the pressure sensor at the connection port of the digital multiple pressure switch. Refrigerant pressure and oil pressure can be measured.

 When the test of the digital multiple pressure switch as described above is completed, power is supplied to the digital multiple pressure switch, and a specific working condition of the refrigerant pressure measurement is set by operating a button which is an input means.

Referring to FIG. 1, a button is set to set a mode of a coolant type, and a type of coolant represented by, for example, 12, 23, 23, 502, 134A, 404, 407, and 410 described at the left end of the information display unit is selected. To set the refrigerant type.

When measuring the refrigerant pressure of two refrigerators using one digital multi-pressure switch, operate the button to set the refrigerator mode and set the refrigeration which is the measurement target of No. 1 and No. 2 described on the right side of the refrigerant type. The refrigeration apparatus to be measured is set by selecting and fixing the apparatus.

Then, the pressure unit is set by operating the button again, and setting the pressure unit by selecting and fixing the type of pressure units of kgf / cm 2, Bar, MPa and mmhg described at the right end of the information display unit.

The measured refrigerant pressure in the high and low pressure portions of the refrigerant transfer path and the oil pressure in the oil transfer path are numerically displayed on the information display so that the user can select the refrigerant pressure and the oil pressure, the type of refrigerant set, and the measured pressure of the refrigerant. Based on the information, the control unit can grasp information including the temperature of the coolant at a glance in a high brightness display window. In addition, by operating a button as necessary, the refrigerating device and the pressure unit to be measured can be reset to continue the measurement of the refrigerant pressure and the oil pressure.

Based on the refrigerant pressure, the oil pressure and the temperature of the refrigerant displayed on the information display unit as described above, the operating conditions of the refrigerating device are input by a button operation. The operation control, alarm output, and cooling fan of the refrigeration machine are operated according to the input operation conditions, thereby preventing the operation and stop error of the freezer and the damage of the freezer. In addition, the alarm and control output of each measurement connection port can be displayed at the bottom of the display window such as LOW, HIGH, MID, FAN1, FAN2, OIL, WET to check the operation status and abnormality of the refrigerator.

In addition, an interface unit may be added to the main body unit 30 so that the operation state of the device may be checked at a remote place, and monitoring and control may be performed using a terminal such as a computer at a remote place.

The digital multiple pressure switch for controlling a refrigerator according to the present invention can secure the accuracy, reliability, and reproducibility of a measurement result by measuring the refrigerant pressure of the refrigerator by a pressure sensor.

And without using an inverter, the main components are integrally formed in one digital multi-pressure switch, so that the structure is simple, equipment cost is reduced, and user convenience is improved.

In addition, by measuring the refrigerant pressure of two or more refrigeration equipment, the operation control of the refrigeration equipment, alarm output, and the control of the cooling fan are simultaneously carried out with a single digital multi-pressure switch, which has the effect of improving economic efficiency and user convenience. .

Furthermore, the unit of the measured refrigerant pressure may be converted into a unit of pressure arbitrarily selected by the user, and the temperature of the refrigerant corresponding to the type and pressure of the refrigerant may be automatically converted and provided to the user. On the basis of this, the freezer can be efficiently controlled.

In the above described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the present invention described in the utility model registration claims below It will be appreciated that it can be changed.

Claims (5)

a) two or more connection ports with a built-in pressure sensor attached directly to the body housing; And b) a signal processor for amplifying the pressure information of the refrigerating apparatus transmitted from the pressure sensor into an electrical signal and converting the pressure information into a digital signal; Perform operation control of the refrigeration machine, operation control of the cooling fan, and alarm generation based on the digital signal transmitted from the signal processor, and convert unit pressure measured in the freezer into a pressure unit selected by the user; A controller converting a temperature of a refrigerant corresponding to the unit-converted pressure according to a type of refrigerant used in the refrigerator; And Is formed in the front portion of the main body housing, in conjunction with the control unit has an information display unit indicating operation information of the refrigerator, pressure information of the refrigerant, operating state of the cooling fan, alarm output,  Refrigeration apparatus control digital multiple pressure switch comprising a main body portion embedded in the main body housing. The digital multiple pressure switch for controlling a refrigerator according to claim 1, wherein the main body includes a power storage unit capable of storing power required to measure and display the pressure of the refrigerant before power is applied. The method of claim 1, wherein the two or more connection ports simultaneously measure the refrigerant pressure on different refrigerant transport paths of one or two refrigerators, and the main body is remotely located on different refrigerant transport paths of the measured refrigerator. Refrigeration apparatus control digital multiple pressure switch further comprises an interface unit to check the operating state of the refrigeration apparatus based on the refrigerant pressure. The digital multiple pressure switch for controlling a refrigerator according to claim 1, wherein the connection port is formed at a lower part, a rear part, or a lower part and a rear part of the main body housing. The method of claim 1, wherein the control unit digitally controls low pressure, high pressure, hydraulic pressure, water pressure, medium pressure, etc. of the refrigerator, alarm output, and operation of a cooling fan, and measures the refrigerant type of the refrigerator and Refrigerating device control digital multiple pressure switch characterized in that for converting the refrigerant pressure in a unit selected by the user to display the evaporation temperature and the condensation temperature of the refrigerant through the information display unit including a high brightness display device.

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