WO2014137060A1 - Appareil pour détecter le moment pour dégivrer un échangeur de chaleur à évaporation sur la base d'une mesure de flux d'air de dérivation et procédé pour commander son fonctionnement - Google Patents

Appareil pour détecter le moment pour dégivrer un échangeur de chaleur à évaporation sur la base d'une mesure de flux d'air de dérivation et procédé pour commander son fonctionnement Download PDF

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Publication number
WO2014137060A1
WO2014137060A1 PCT/KR2013/011235 KR2013011235W WO2014137060A1 WO 2014137060 A1 WO2014137060 A1 WO 2014137060A1 KR 2013011235 W KR2013011235 W KR 2013011235W WO 2014137060 A1 WO2014137060 A1 WO 2014137060A1
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Prior art keywords
flow rate
heat exchanger
defrost
defrosting
defrosting operation
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PCT/KR2013/011235
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English (en)
Korean (ko)
Inventor
최득남
김경우
성효원
임현
김진수
Original Assignee
주식회사 두텍
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Publication of WO2014137060A1 publication Critical patent/WO2014137060A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F17/00—Removing ice or water from heat-exchange apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/002—Defroster control
    • F25D21/006—Defroster control with electronic control circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels

Definitions

  • the present invention relates to a defrosting time detection device and an operation control method of the evaporative heat exchanger by measuring the bypass air flow, and more specifically, to measure the internal air flow of the main cover of the forced-air evaporative heat exchanger through a bypass path
  • the bypass air can detect the start and end of the defrosting operation more accurately without malfunction and perform efficient defrosting operation.
  • the present invention relates to an apparatus for detecting defrost time of an evaporative heat exchanger by flow measurement and a method of controlling the same.
  • the refrigeration and freezing cycle of the air conditioner includes a compressor for compressing a refrigerant at high temperature and high pressure, a condensation heat exchanger and a condenser fan for condensing the compressed high temperature and high pressure refrigerant to a liquid phase, and a refrigerant of the condensed liquid phase.
  • An expansion valve which expands and converts into a two-phase refrigerant in liquid and gaseous phase, and an evaporation heat exchanger and an evaporation fan that evaporate and evaporate the two-phase refrigerant expanded at low pressure with air.
  • the evaporative heat exchanger which cools the storage space through this cycle, has a relatively low surface temperature compared to the temperature of the storage space, which causes the surface of the evaporative heat exchanger to condense moisture condensed from air in the storage space, which is relatively hot. Is deposited.
  • the frost deposited on the surface of the evaporation heat exchanger becomes thicker and thicker with time, resulting in excessive heat consumption of the cold air passing through the evaporation heat exchanger, resulting in excessive power consumption.
  • a defrost heater is installed inside an evaporation heat exchanger, and a defrosting operation is performed to remove frost deposited on the evaporation heat exchanger by driving the defrost heater every predetermined time, or during normal operation of the refrigerant at a predetermined time.
  • the defrosting operation was performed to reverse the flow of.
  • Republic of Korea Patent No. 10-0674180 registered on January 18, 2007, name: wind pressure defrosting detection device of the evaporation heat exchanger for air conditioning equipment
  • the load of the fan of the forced air type evaporative heat exchanger detects this Is provided with a differential pressure operation switch for operating a defrosting operation
  • a technique related to a wind pressure defrosting time detection device of an evaporative heat exchanger for a heating and cooling device which is provided with a heating heater to prevent a malfunction of the differential pressure operation switch due to a low temperature. It is.
  • the differential pressure operation switch is operated to perform defrosting operation.
  • the frost deposited on the forced air evaporative heat exchanger can be removed, thereby maximizing the thermal efficiency of the forced air evaporative heat exchanger and preventing overload of the fan to prevent component damage.
  • the structure is simple and precisely detects the defrosting operation point without detection error, greatly reducing the power consumption, greatly improving the cooling efficiency, and easily adjusting the detection accuracy according to the frost deposition amount. do.
  • a communication tube connecting the inside and the outside of the evaporative heat exchanger is installed, and a connecting tube connected to the communicating tube is installed to form a detection unit.
  • the detector detects the defrosting operation time by using the suction force generated by Bernoulli's theorem generated in the connecting pipe.
  • the technical problem to be solved by the present invention is to measure the air flow and the rate of change of the inside of the body cover of the forced blow type evaporative heat exchanger caused by the evaporation fan through a bypass path, the outside air temperature and outlet of the forced blow type evaporative heat exchanger By detecting the start and end points of the defrosting operation by combining the temperature measurement results, to provide a defrosting time detection device and an operation control method of the evaporative heat exchanger by bypass air flow measurement which can efficiently control the defrosting operation without malfunction. It is.
  • the bypass pipe is installed in communication with the interior of the body cover surrounding the evaporation heat exchanger Selection of the flow rate detection unit for detecting the flow rate according to the air flow generated inside the main body cover of the evaporative heat exchanger through the bypass pipe, the digital input unit for receiving the command to allow or stop the defrosting from the external device or the user, and the average value measurement mode.
  • the flow rate detected by the defrost operation requirements and flow rate detection unit set by the user through a key operation unit, a key operation unit and a digital input unit supporting a interface between the user and the control unit with a plurality of keys for adjusting the set value required for defrost operation Start / end time of defrosting operation and alarm output by value change
  • the control unit for controlling the operation of the refrigerator and the overall operation of the defrosting point detecting device, and the flow detection unit according to the control signal of the control unit.
  • a memory unit for storing the average value and the user parameter for the flow rate change in the normal operation state measured in the and generates a relay drive signal for transmitting the valve control signal at the start / end of the defrost operation and alarm output output from the control unit Defrosting time detection device of the evaporative heat exchanger by a bypass air flow measurement comprising a relay drive.
  • the apparatus of the present invention may be implemented by further comprising a temperature detector installed in the periphery of the evaporative heat exchanger and the evaporator of the evaporative heat exchanger respectively to measure the ambient temperature of the evaporative heat exchanger and the evaporator temperature of the evaporative heat exchanger, respectively.
  • the apparatus of the present invention may further include a display unit for displaying the flow rate change amount, the operation state of the refrigerator and the operation state of the defrost point detection device according to the display control signal output from the control unit.
  • the controller is configured to set the amount of change in the flow rate measured and calculated by the flow rate detector in a state where the ambient temperature measured by the temperature detector and the evaporator heat exchanger evaporator temperature conditions are satisfied. And defrosting operation and alarm output control in comparison with the alarm setting reference value, respectively.
  • control unit measures the flow rate through the flow rate detection unit according to the user's key operation in the standby operation state, calculates an average value of the rate of change of the flow rate inside the body cover of the evaporative heat exchanger, and stores it in the memory unit. Or a flow rate change rate pre-stored in the memory unit as an average value.
  • the control unit, the defrosting permission digital input (ID1) of the digital input unit is in the on state and the defrost prohibition digital input (ID2) off state
  • the defrosting allowable temperature (Amb.T) measured value of the temperature detector is If the measured value is less than the reference value and the defrosting temperature (Eva.T) measured value is less than the defrosting temperature reference value
  • the flow rate change amount measured and calculated by the flow rate detection unit is compared with the preset defrosting operation reference value and is higher than the preset defrosting operation reference value. It is characterized by controlling the defrosting operation when high.
  • the control unit compares the calculated flow rate change amount again with the alarm setting reference value to set the alarm It is characterized by controlling defrosting operation and alarm output at the same time when it is higher than the set reference value.
  • the flow rate detection unit is formed on one side of the body cover of the at least one air inlet and air outlet, the body of the evaporation heat exchanger is formed with a flow path for the inflow or outflow of the outside air is built in the flow detection sensor on the passage. It consists of a bypass pipe connector for communicating the inside and the outside of the evaporative heat exchanger, and a flexible pipe whose both ends are opened and air or fluid can move along the inside of the pipe, and one open end is connected to the bypass pipe connector and the air inlet port. Or it is provided with a bypass pipe connected to the open end of the other side to the outlet, characterized in that configured to measure the flow rate for the flow of air inlet or outlet through the air inlet and outlet.
  • the display unit the flow rate display unit for digitally displaying the flow rate detection value detected by the flow rate detection unit, and the operating state of the refrigerator and the operation state of the defrosting point detection device according to the display control signal output from the control unit Characterized in that it comprises a LED driving unit for generating a LED driving signal for displaying.
  • the controller is characterized in that for calculating the rate of change of the flow rate inside the body cover of the evaporative heat exchanger by measuring the flow of air flowing in the bypass pipe through the flow rate detection unit for a specified delay time.
  • the bypass pipe capable of measuring the change in the internal air flow of the body cover of the evaporative heat exchanger on the body side of the body cover of the forced blow type evaporative heat exchanger having an evaporation fan.
  • the defrosting operation control method of the forced blow type evaporative heat exchanger having a flow rate detection unit installed therein and measuring a change in flow rate according to the flow of air caused inside the main body cover of the evaporative heat exchanger through a bypass pipe.
  • the third step (c1) the defrosting operation requirements set by the user while controlling the defrosting operation when the flow rate change rate is higher than the defrosting operation reference value and lower than the alarm output reference value as a result of the determination in the second step
  • the defrosting operation control step in parallel with the operation (B) for monitoring whether or not the change is made, or (c2) when the flow rate change rate is higher than the alarm output reference value as a result of the determination in the second step, the user simultaneously controls the defrosting operation and the alarm output.
  • the defrosting operation and the alarm output control step in parallel with the operation (B) for monitoring whether or not the set defrosting operation requirement is changed.
  • the flow rate change rate calculating step of the first step is performed for a specified delay time, characterized in that the flow rate change rate inside the body cover of the evaporative heat exchanger is calculated by the flow rate measured during the delay time.
  • the defrosting permit digital input (ID1) of the digital input unit is on, the defrost prohibition digital input (ID2) is off, and the defrosting allowable temperature of the temperature detector ( Amb.T) Detects when the measured value is below the defrosting temperature reference value and the defrosting temperature (Eva.T) measurement value is below the defrosting temperature reference value as the defrosting operation requirement.
  • the flow rate change amount is higher than the preset defrosting operation reference value
  • the calculated flow rate change amount is compared with a preset defrosting operation reference value.
  • the calculated flow rate change amount is compared with the alarm setting reference value again to determine the flow rate change amount.
  • it detects by defrost operation and alarm output control condition for controlling defrost operation and alarm output at the same time.
  • the flow rate change amount of the evaporation heat exchanger is calculated through a bypass pipe installed to communicate with the inside of the body cover of the evaporation heat exchanger, and the rate of change of the flow rate and the ambient temperature and the evaporator heat exchanger evaporator temperature measurement results are combined one.
  • the detection apparatus of the defrosting operation start point, the defrosting operation, and the end of the defrosting operation can be detected and the operation control can be performed. Therefore, the defrosting operation start point and the end point can be accurately detected without malfunction and the defrosting operation can be efficiently controlled. There is an advantage.
  • FIG. 1 is a block diagram illustrating the overall configuration of an apparatus for detecting a defrost time of an evaporative heat exchanger by measuring a bypass air flow according to an embodiment of the present invention.
  • Figure 2 is an overall schematic and principal part enlarged cross-sectional view of the defrosting point detection apparatus of the evaporative heat exchanger by the bypass air flow measurement according to an embodiment of the present invention
  • Figure 3 is an evaporative heat exchanger by the bypass air flow measurement according to the present invention It is a schematic diagram for explaining the operation principle of the defrost point detection apparatus of.
  • 4 to 6 are operational flowcharts illustrating a method of controlling defrosting operation of an evaporative heat exchanger by measuring a bypass air flow according to another embodiment of the present invention.
  • FIG. 7 is an average value of the flow rate change rate illustrated to explain the operation of controlling the defrosting operation and the alarm output according to the flow rate change rate calculated through the flow rate measurement in the defrost point detection device of the evaporative heat exchanger by the bypass air flow measurement according to the present invention , A defrosting operation reference value and an alarm setting reference value, and corresponding delay time timings.
  • bypass path referred to herein refers to a path that does not directly pass through the fan coil of the evaporative heat exchanger, and in the following, defrosting allowable temperature (Amb.T) and defrosting prohibited temperature (Eva).
  • Amb.T defrosting allowable temperature
  • Eva defrosting prohibited temperature
  • FIG. 1 is a block diagram illustrating the overall configuration of a defrosting point detection apparatus of an evaporative heat exchanger by measuring the bypass air flow according to an embodiment of the present invention
  • Figure 2 is a bypass air flow according to an embodiment of the present invention
  • Fig. 3 is a schematic diagram and an enlarged cross-sectional view illustrating the state in which the bypass pipe and the flow rate detection unit are installed on one side of the main cover of the evaporative heat exchanger in the defrost point detection device of the evaporative heat exchanger by measurement
  • FIG. Reference is an example for explaining the air flow measurement operation through.
  • the apparatus for detecting the defrosting time of the evaporative heat exchanger by measuring the bypass air flow is a forced air type evaporative heat exchanger 10 through the bypass pipe 112.
  • Flow detection unit 110 for detecting the flow rate of the air flowing inside the main body cover 11 of the temperature, temperature detection unit 120 for detecting the ambient temperature and evaporator heat exchanger evaporator temperature, key operation unit 130 for the user interface, external device Or a digital input unit 131 capable of receiving a command to allow or stop defrosting from the user, a controller 140 for controlling the entire system of the operation of the refrigerator and a defrost point detection device, and an average value and a user parameter of the flow rate change in a steady state.
  • Memory unit 150 to store, the relay drive unit 160 for transmitting the defrost start end signal according to the operation mode of the freezer, the flow rate change and the operation of the freezer And defrost is configured to include a display unit 170 for displaying an operating state of the point detecting device.
  • the forced air type evaporative heat exchanger 10 is configured to cover the evaporator body as a whole by the body cover 11 and to force the internal air to be discharged to the outside by the evaporation fan 12.
  • the flow rate detection unit 110 is provided with an air inlet 110a and an air outlet 110b having an air inlet passage (not shown in the drawing) therein, and are connected to the air inlet 110a and the air outlet 110b.
  • a flow rate detection sensor (not shown in the figure) is built in the passage to detect a flow rate according to the flow of air generated inside the body cover 11 of the evaporative heat exchanger 10 through the bypass pipe 112. It is configured to be.
  • the flow rate detection unit 110 is configured such that air flowing into the air inlet 110a from the outside may be discharged to the bypass pipe 112 through the air outlet 110b or a flow in the opposite direction may be formed.
  • the flow rate of the air flowing through the air inlet 110a and the outlet 110b is configured to be measured by a sensor embedded in the passage and displayed through the flow rate display unit 171.
  • the bypass pipe connector 111 is installed on one side of the body cover 11 of the evaporation heat exchanger 10 to communicate the inside and the outside of the evaporation heat exchanger 10.
  • the bypass pipe connector 111 and the bypass pipe 112 are frost deposited on the evaporation heat exchanger 10
  • the outside air is evaporated heat when the inflow of air through the heat exchange fin of the evaporation heat exchanger 10 is not smooth. The flow flowing into the body cover 11 of the exchanger 10 will increase.
  • the bypass pipe 112 extends from the evaporative heat exchanger 10 body cover 11 to the outside of the evaporative heat exchanger 10, as illustrated in FIG. It may be extended.
  • bypass pipe 112 is installed in the rear surface of the main body cover 11 in the figure which illustrates this apparatus, it may be formed in a side or lower part, of course.
  • the bypass pipe 112 is formed of a flexible pipe in which both ends are opened and air or fluid can move along the inside of the pipe, and one open end is connected to the bypass pipe connector 111, and an air outlet of the flow rate detection unit 110 is provided. The open end of the other side is connected to 110b.
  • FIG. 3 is a schematic diagram illustrating the operation principle of the defrosting point detection apparatus of the evaporative heat exchanger by the bypass air flow measurement according to the present invention, forced ventilation type evaporative heat is installed evaporation fan 12 in the configuration as shown in FIG.
  • the drawings illustrate the flow rate change of the air flowing in the bypass pipe.
  • the interior of the model kit 113 is shown.
  • the model fan 113b installed in the operating model the outside air is normally introduced into the interior of the model kit 113 through a plurality of through holes 113a formed at the rear side of the model kit 113, so that the front of the model kit 113 is closed. Normal discharge to the open side ends occurs. Therefore, in the state in which the normal operation of the forced blow type evaporative heat exchanger 10 is maintained, the flow of air introduced into the model kit 113 through the bypass pipe connector 111 and the bypass pipe 112 maintains a certain amount. Will be done.
  • the bypass pipe 112 and the bypass pipe connector The flow of air introduced into the body cover 11 through the 111 will increase, and the flow rate detection unit 110 can measure and detect such a flow rate or a change amount of the flow rate.
  • the temperature detector 120 is preferably composed of at least two temperature sensors for measuring the defrosting allowable temperature (Amb.T) and the defrosting prohibited temperature (Eva.T), respectively, of which the defrosting allowable temperature (Amb.T)
  • the temperature sensor for measuring the temperature is installed inside the body cover 11 of the evaporation heat exchanger 10, the temperature sensor for measuring the defrost prohibition temperature (Eva.T) is respectively installed in the evaporator of the evaporation heat exchanger (10) evaporative heat It is configured to measure the ambient temperature around the exchanger and the evaporator temperature of the evaporative heat exchanger, respectively.
  • the installation position of the temperature sensor for measuring the ambient temperature is enough to detect the temperature inside the evaporation heat exchanger 10, but is preferably provided between the heat exchange fins installed in the evaporation heat exchanger (10).
  • the key manipulation unit 130 includes a plurality of keys for selecting a mean value measuring mode or adjusting a set value required for defrosting operation to support an interface between the user and the control unit.
  • the key control unit 130 may be provided with one or more keys for setting whether to use the defrost allowable temperature Amb.T and the defrost inhibited temperature Eva.T, which are output values of the temperature sensors of the temperature detector 120.
  • the control unit 140 may subsequently set the defrost allowable temperature (Amb.T) and the defrost inhibited temperature (Eva.T) measured values measured by the respective temperature sensors.
  • the temperature reference is compared with each other.
  • the digital input unit 131 supports an interface for receiving a command to allow or stop defrosting from an external device or a user, and is configured to enable a digital input ID1 for defrosting permission and a digital input ID2 for prohibiting defrosting. do.
  • the control unit 140 is a means for controlling the operation of the refrigerator and the overall operation of the defrost point detection device, and measures the flow rate of the bypass pipe 112 through the flow rate detection unit 110 in an operation standby state and then operates a user's key. By checking the state, the flow rate measurement and the rate of change of the flow rate of the evaporative heat exchanger during the specified delay time are calculated and stored in the memory unit 150 as an average value or the flow rate change rate previously stored in the memory unit 150 as an average value and then set by the user. Digital input conditions and temperature conditions (defrost operation requirements) are monitored (B: see FIG. 4).
  • the control unit 140 monitors the defrosting permission digital input ID1 on and defrost prohibition digital input ID2 off of the digital input unit 131 and the defrosting allowable temperature Amb.T of the key operation unit 130 through such monitoring. And defrosting temperature (Eva.T) setting status, the defrosting allowable temperature (Amb.T) measurement value and the defrosting inhibiting temperature (Eva.T) measurement value of each preset defrosting temperature Compared with the reference value and the defrosting temperature reference value, it detects that the measured defrosting allowable temperature (Amb.T) is less than the defrosting allowable temperature reference value and the defrosting temperature (Eva.T) measured value is less than the defrosting temperature reference value.
  • the controller 140 turns off the alarm LED and the defrost LED of the display unit 170 and returns to the initial stage, and the defrosting operation set by the user is required.
  • the flow rate is measured through the flow rate detecting unit 110 to calculate the flow rate change rate, and whether the calculated flow rate change rate is higher than the preset defrosting operation reference value and above the preset alarm setting reference value. It determines whether it is high, and selectively performs a defrosting operation (refer FIG. 5), or a process operation which performs control of defrosting operation (refer FIG. 5) and an alarm output (refer FIG. 6) according to the result.
  • the control unit 140 having such a function may be configured as an internal block or a program module having a process having the same function to execute the above operation. At this time, the control unit 140 is configured to measure the flow rate flowing in the bypass pipe 112 through the flow rate detection unit 110 continuously for a specified delay time in order to prevent the error is configured to calculate the rate of change of the flow rate of the evaporative heat exchanger.
  • the memory unit 150 may store an average value of the flow rate change amount of the steady state calculated and transmitted by the controller 140, and may store a plurality of parameters by user setting.
  • the parameter may include a defrosting permission temperature reference value for defrosting permission (for example, a temperature value within the range of -5 ° C to 5-10 ° C) and a defrosting temperature reference value for defrosting prohibition (for example, 0.0 ° C to 30.0).
  • the driving reference value and the alarm setting reference values may be set as illustrated in the graph of FIG. 7.
  • the relay driver 160 generates a relay driving signal for transmitting a defrosting operation start / end signal output from the controller 140.
  • the display unit 170 includes a flow rate display unit 171 for digitally displaying the flow rate detection value detected by the flow rate detection unit, and an LED for displaying the operation state of the refrigerator and the operation state of the defrost point detection device according to the display control signal output from the control unit.
  • the LED driver 172 generates a driving signal. For example, it may include a defrost LED, an alarm LED, and the like.
  • FIG. 4 to 6 are operation flowcharts illustrating an operation control method of a defrosting point detection device by measuring a bypass flow rate of an evaporative heat exchanger for a cooling apparatus according to another embodiment of the present invention
  • FIG. 7 is a bypass according to the present invention.
  • a bypass pipe is installed to communicate with the inside of the main body cover of the evaporative heat exchanger, and the evaporation heat exchanger in which the flow rate detection unit 110 is connected to the bypass pipe 112.
  • the defrosting operation control method performed by the control operation of the control unit 140 in (a) calculates the flow rate change rate of the evaporative heat exchanger in the operation standby state and stores it as an average value, or after designating the prestored flow rate change rate as an average value (B) the first step (B) of monitoring whether the digital input condition and the temperature condition (defrost operation requirement) set by the user are satisfied, and (b) if the defrost operation requirement by the user setting is satisfied.
  • the second step (S131, S132, S151), (c) to determine the case where the rate of change of quantity is higher than the alarm output reference value, respectively (c)
  • the digital input condition and the temperature condition set by the user according to the determination result of the second step (defrost A third step (S133-S147, S152-S166) for selectively performing defrosting operation control, or defrosting operation control and alarm output control while performing operation (B) of monitoring whether the driving requirement) is satisfied.
  • the defrosting operation is performed while the digital input condition and temperature condition set by the user Defrost operation control steps (c1; S131-S147) in parallel with the operation (B) for monitoring whether the condition is satisfied, or as a result of the determination, when the flow rate change rate is higher than the alarm output reference value, the user sets the alarm output while executing the alarm output.
  • the first step (a) is a step of measuring the flow rate of the flow through the bypass pipe 112 through the flow rate detection unit 110 in the standby operation state (S101), checking the user's key operation state (S102), setting the average value If the mode is not selected (NO branch of S102), the flow rate change rate pre-stored in the memory unit 150 is designated as an average value (S103).
  • the flow rate for the specified delay time Measuring and calculating the flow rate change rate of the evaporative heat exchanger (S121-S124), storing the calculated flow rate change rate as an average value in the memory unit 150 (S125), after calculating the flow rate change rate by measuring the flow rate again the user
  • Monitoring whether the set digital input condition and temperature condition (defrost operation requirement) are detected (B; S101-S112), and turning off both the alarm LED and the defrost LED if the defrost operation requirement is not detected (S113). It is configured to include).
  • the monitoring step (B) is the on state of the defrost permission digital input ID1 of the digital input unit 131 and the off state of the defrost prohibition digital input ID2, the defrost allowable temperature Amb.T of the key operation unit 130 and Step (S105-S107, S109, S110, S112) of checking whether the defrost inhibited temperature (Eva.T) is set or not, and in this monitoring step, the defrosting permission digital input (ID1) is on and defrost is prohibited. Measuring the defrosting allowable temperature (Amb.T) of the temperature detector 120 while the digital input (ID2) is off and the defrosting allowable temperature (Amb.T) and the defrosting prohibited temperature (Eva.T) are set to use both.
  • Defrosting temperature (Eva.T) measured value compared with each preset defrosting temperature reference value (eg 15 °C) and defrosting temperature reference value (eg 20 °C).
  • the measured value is below the defrosting permit temperature standard and the defrosting temperature (Eva.T) measured value is based Defrost operation requirement of less than the value is detected.
  • the second step (b) is performed when the defrosting operation requirement set by the user is detected by performing the monitoring step (B).
  • the step (S131) of calculating the flow rate change rate by measuring the flow rate is performed. The change rate is compared with each of the preset defrosting operation threshold and alarm setting reference value, respectively to determine when the calculated flow rate of change is higher than the defrosting operation threshold and lower than the alarm output threshold, and when the calculated flow rate of change is higher than the alarm setting threshold. Steps S132 and S151 are performed.
  • Defrost operation control step (c1) of the third step (c), by checking the defrost output ON (ON) / OFF (OFF) state to determine whether or not currently in defrost operation (S133), whether the defrost operation If it is determined that the defrosting operation is not currently in operation (YES branch of S133), the defrosting output on delay time (T1) of operating the counter (S134), blinking the defrost LED (S135), the defrosting output on delay time (T1) has elapsed ( For example, a step (S136) of waiting for T1 60sec), and at the same time, monitoring whether the defrosting operation requirements (digital input condition and temperature condition) set by the user are changed (B; S101-S112).
  • the bypass pipe 112 is installed to communicate with the inside of the main body cover 11 of the evaporative heat exchanger 10 so that the flow rate flowing into the main body cover of the evaporative heat exchanger 10 may be increased.
  • the flow rate detection unit 110 is connected in communication with the bypass pipe connecting portion 111 and the bypass pipe 112, and the defrost allowable temperature (Amb) of the temperature detector 120 is provided.
  • the temperature sensor for the measurement is installed around the evaporation heat exchanger 10 and the temperature sensor for the defrost inhibited temperature (Eva.T) measurement is installed in the evaporator of the evaporation heat exchanger (10).
  • the control unit 140 measures the flow rate of the flow through the bypass pipe 112 through the flow rate detection unit 110 in the operation standby state as illustrated in FIG.
  • the state is checked (S102) to confirm whether the average value setting mode is selected.
  • the average value setting mode is selected (YES branch of S102)
  • the flow rate measurement and the rate of change of the flow rate of the evaporative heat exchanger are calculated during the specified delay time (S121-S124), and the average value setting mode is stored in the memory unit 150 (S125). If is not selected (NO branch in S102), the flow rate change rate previously stored in the memory unit 150 is designated as an average value (S103), and then the flow rate is measured again (S105).
  • the controller 140 checks whether the digital input condition set by the user, that is, whether the defrosting permission input ID1 is on and the defrost prohibition input ID2 is off, respectively (S105 and S106).
  • one temperature condition i.e., whether to use the defrosting allowable temperature (Amb.T) is checked (S107), and the defrosting allowable temperature (Amb.T) is set to use (YES branch of S107) around the evaporative heat exchanger 10
  • it is set to check whether the setting state (S110) to use the defrost prohibition temperature (Eva.T) (YES branch of S110) through the temperature sensor installed in the evaporator of the evaporation heat exchanger 10 defrost prohibition temperature (Eva.T
  • the control unit 140 turns off the alarm LED and the defrost LED of the display unit 170 (S113) and returns to the initial stage (A), and the defrosting operation requirement set by the user (defrost permit digital input).
  • ID1 Measured value of defrost allowable temperature (Amb.T) with ON state, defrost prohibited digital input (ID2) off state, defrost allowable temperature (Amb.T) and defrost inhibited temperature (Eva.T) set to use all
  • the control unit 140 displays the flow rate detecting unit (as illustrated in FIG. 5). 110 to measure the flow rate (S131) to calculate the flow rate change rate and the calculated flow rate In operation S132, the change rate is higher than a predetermined defrosting operation reference value.
  • the control unit 140 turns off both the alarm LED and the defrost LED of the display unit 170 again (S113) and returns to the initial stage (A).
  • the defrost output is checked to determine whether or not the defrosting operation is being performed or not (S133) and the calculation as illustrated in FIG. It is determined whether the rate of change of the flow rate is higher than the preset alarm setting reference value (S151).
  • defrosting operation (S133) as a result of the defrosting operation (YES branch of S133) after the defrost output on delay time (T1) counter operation (S134) and then defrost LED on (S135) defrost output on delay time elapsed While waiting (S136) and monitoring whether the digital input condition and the temperature condition set by the user are detected (B; S101-S112) simultaneously (S137) while measuring the flow rate measurement (S138) and calculated therefrom It is determined whether the flow rate change rate is lowered below the defrosting operation reference value (S139).
  • the alarm LED and the defrost LED of the display unit 170 are turned off (S113), and the process returns to the initial stage (A).
  • the defrost output on delay time T1 elapses (YES branch of S136) when the flow rate of change is higher than the defrosting operation threshold (YES branch of S139)
  • the defrost output and defrost LED are turned on (S140) and the defrost output on holding time (T2)
  • the counter is operated (S141) and waits for the defrost output on holding time to elapse (S142), and in this standby state, the corresponding time is elapsed (YES branch of S142) or the defrosting operation is determined (S133).
  • the flow rate measurement is measured again (S143). Subsequently, the controller 140 measures the flow rate (S143), calculates a flow rate change rate, and determines whether the calculated flow rate change rate is higher than a predetermined defrosting operation reference value (S144), and the calculated flow rate change rate is higher than the defrosting operation reference value.
  • step S151 of determining whether the calculated flow rate change rate is higher than or equal to a preset alarm setting reference value when the flow rate change rate is less than the preset alarm setting reference value (NO branch of S151), measuring flow rate (S131). Returning to, the flow rate change rate is calculated, and the flow rate change rate is re-entered at step S132 to determine whether the calculated flow rate change rate is higher than or equal to a predetermined defrosting operation reference value. On the other hand, if the flow rate of change is higher than the preset alarm set reference value (YES branch of S151), the alarm output is checked to determine whether or not the current alarm output is present (S152), and if the flow rate is not currently being output (YES branch of S152).
  • the controller 140 measures the flow rate (S162), calculates a flow rate change rate, and determines whether the calculated flow rate change rate is higher than a preset alarm setting reference value (S163), and the calculated flow rate change rate is higher than the alarm setting reference value. In case of (YES branch of S163), the process returns to the initial stage (A) .In contrast, when the calculated flow rate of change is less than the alarm setting reference value (NO branch of S163), the alarm output and the alarm LED are both turned off (S164) and the alarm is returned.
  • the output off holding time T5 is operated (S165) to wait for the specified off holding time to elapse (S166), and when the alarm output off holding time has elapsed (YES branch of S166), the process returns to the initial stage A.
  • the flow rate through the bypass path for a specified delay time and the flow rate through the evaporation heat exchanger and The change amount is calculated, and the flow rate change is detected to increase by more than a reference value, and it is possible to accurately calculate the time point at which frost occurs by combining with the temperature condition around the evaporator heat exchanger and the evaporator heat exchanger temperature condition.
  • the malfunction of the defrosting operation can be reduced, and thus the defrosting operation can be efficiently performed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Defrosting Systems (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

La présente invention porte sur un appareil pour détecter le moment pour dégivrer un échangeur de chaleur à évaporation sur la base d'une mesure de flux d'air de dérivation, et sur un procédé pour commander ses opérations. La présente invention a pour objet un appareil pour détecter le moment pour dégivrer un échangeur de chaleur à évaporation sur la base d'une mesure de flux d'air de dérivation, l'appareil comprenant : une unité de détection de débit servant à détecter le débit résultant d'un flux d'air créé à l'intérieur d'un couvercle de corps de l'échangeur de chaleur à évaporation au moyen d'une tuyauterie de dérivation ; une unité d'entrée numérique capable de recevoir une instruction pour autoriser ou arrêter le dégivrage ; une unité de manipulation de clavier qui supporte une interface pour régler des ajustements de valeur nécessaires pour une opération de dégivrage ou un mode de mesure de valeur moyenne ; une unité de commande destinée à commander l'opération de dégivrage, une commande de sortie d'alarme et une opération d'affichage d'état de fonctionnement, sur la base d'une condition nécessaire d'opération de dégivrage fixée par l'utilisateur, et un taux de variation de débit mesuré par l'unité de détection de débit ; une unité de mémoire destinée à stocker une valeur moyenne concernant l'amplitude de variation de débit et un paramètre d'utilisateur ; et une unité d'entraînement à relais destinée à transmettre un signal de commande de soupape de l'unité de commande ; et un procédé pour commander le fonctionnement de l'appareil de telle sorte que l'opération de dégivrage peut être commandée efficacement sans opérations erronées.
PCT/KR2013/011235 2013-03-04 2013-12-05 Appareil pour détecter le moment pour dégivrer un échangeur de chaleur à évaporation sur la base d'une mesure de flux d'air de dérivation et procédé pour commander son fonctionnement WO2014137060A1 (fr)

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KR20130022910 2013-03-04

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109612027A (zh) * 2018-12-18 2019-04-12 天津大学 一种基于显微摄像分析空气源热泵结霜的方法及控制系统
WO2019164084A1 (fr) * 2018-02-23 2019-08-29 엘지전자 주식회사 Réfrigérateur
WO2019172497A1 (fr) * 2018-03-08 2019-09-12 엘지전자 주식회사 Réfrigérateur
KR20190112464A (ko) * 2018-03-26 2019-10-07 엘지전자 주식회사 냉장고 및 그 제어방법
CN111801539A (zh) * 2018-03-08 2020-10-20 Lg电子株式会社 冰箱及其控制方法
US20210010738A1 (en) * 2018-03-26 2021-01-14 Lg Electronics Inc. Refrigerator and method for controlling same
CN113739460A (zh) * 2021-08-26 2021-12-03 珠海格力电器股份有限公司 蒸发器除霜处理方法、装置及热泵设备

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100674180B1 (ko) * 2006-06-01 2007-01-24 양승덕 냉난방장치용 증발열교환기의 풍압제상시점검출장치
JP2008051361A (ja) * 2006-08-23 2008-03-06 Matsushita Electric Ind Co Ltd ヒートポンプ式給湯機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100674180B1 (ko) * 2006-06-01 2007-01-24 양승덕 냉난방장치용 증발열교환기의 풍압제상시점검출장치
JP2008051361A (ja) * 2006-08-23 2008-03-06 Matsushita Electric Ind Co Ltd ヒートポンプ式給湯機

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019164084A1 (fr) * 2018-02-23 2019-08-29 엘지전자 주식회사 Réfrigérateur
KR20190101669A (ko) * 2018-02-23 2019-09-02 엘지전자 주식회사 냉장고
KR102627972B1 (ko) 2018-02-23 2024-01-23 엘지전자 주식회사 냉장고
CN111771092A (zh) * 2018-02-23 2020-10-13 Lg电子株式会社 冰箱
US20200370815A1 (en) * 2018-02-23 2020-11-26 Lg Electronics Inc. Refrigerator
CN111771092B (zh) * 2018-02-23 2022-04-15 Lg电子株式会社 冰箱
US20210055034A1 (en) * 2018-03-08 2021-02-25 Lg Electronics Inc. Refrigerator and controlling method the same
WO2019172497A1 (fr) * 2018-03-08 2019-09-12 엘지전자 주식회사 Réfrigérateur
CN111801539A (zh) * 2018-03-08 2020-10-20 Lg电子株式会社 冰箱及其控制方法
US11530866B2 (en) 2018-03-08 2022-12-20 Lg Electronics Inc. Refrigerator
CN111801539B (zh) * 2018-03-08 2022-04-26 Lg电子株式会社 冰箱及其控制方法
US20210025639A1 (en) * 2018-03-26 2021-01-28 Lg Electronics Inc. Refrigerator and method for controlling the same
US20210010738A1 (en) * 2018-03-26 2021-01-14 Lg Electronics Inc. Refrigerator and method for controlling same
CN111886462B (zh) * 2018-03-26 2022-05-03 Lg电子株式会社 冰箱及其控制方法
CN111886462A (zh) * 2018-03-26 2020-11-03 Lg电子株式会社 冰箱及其控制方法
KR102604129B1 (ko) 2018-03-26 2023-11-20 엘지전자 주식회사 냉장고 및 그 제어방법
US11867448B2 (en) 2018-03-26 2024-01-09 Lg Electronics Inc. Refrigerator and method for controlling the same
KR20190112464A (ko) * 2018-03-26 2019-10-07 엘지전자 주식회사 냉장고 및 그 제어방법
CN109612027A (zh) * 2018-12-18 2019-04-12 天津大学 一种基于显微摄像分析空气源热泵结霜的方法及控制系统
CN109612027B (zh) * 2018-12-18 2023-10-27 天津大学 一种基于显微摄像分析空气源热泵结霜的方法及控制系统
CN113739460A (zh) * 2021-08-26 2021-12-03 珠海格力电器股份有限公司 蒸发器除霜处理方法、装置及热泵设备
CN113739460B (zh) * 2021-08-26 2022-06-07 珠海格力电器股份有限公司 蒸发器除霜处理方法、装置及热泵设备

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