JP3934644B2 - Refrigeration cycle performance inspection system - Google Patents

Description

  The present invention relates to a performance inspection device for a refrigeration cycle for inspecting the performance of a heat exchanger and an expansion device constituting the refrigeration cycle, and more particularly, to a refrigeration cycle having a capacity of several watts (w). The present invention relates to a performance inspection apparatus for a refrigeration cycle in which the performance of a small-capacity heat exchanger and a micro-orifice can be measured.

  In general, a refrigeration cycle used for an air conditioner, a refrigerator, or the like includes a heat exchanger having a compressor, a condenser, and an evaporator, and an expansion device having an orifice and the like. Through a closed circuit.

  Here, the compressor compresses the refrigerant into a high-temperature and high-pressure gaseous state, and the condenser condenses the high-temperature and high-pressure gaseous refrigerant sent from the compressor into a high-temperature and high-pressure liquid refrigerant. Furthermore, the high-temperature and high-pressure liquid refrigerant condensed in the condenser is squeezed and expanded through an expansion device to become a low-temperature and low-pressure liquid refrigerant, and the evaporator evaporates the low-temperature and low-pressure liquid refrigerant that has passed through the expansion device. The refrigerant is in the gaseous state.

  For this reason, the refrigerant circulating along the refrigerant pipe releases heat while being condensed in the condenser, and absorbs the surrounding heat while being evaporated in the evaporator, and the evaporator performs a cooling action. .

  Then, before the components of these refrigeration cycles are attached to an air conditioner or a refrigerator, the performance is measured to check for abnormalities.

  Here, the inspection device for inspecting the performance of the heat exchanger and the expansion device includes a normal compressor and a refrigerant pipe to which the compressor is connected, and a condenser whose performance is to be measured in the middle of the refrigerant pipe. And an evaporator and an expansion device are attached. A cooling fluid is provided outside the condenser and the evaporator to exchange heat with the refrigerant in the condenser and the evaporator, and refrigerant pipes and outlets on the inlet side of the respective condenser, evaporator and expansion device A sensor for measuring the temperature and pressure of the refrigerant is attached to the refrigerant pipe on the side.

  For this reason, if the compressor is operated in this state, the refrigerant compressed by the compressor circulates through each component while sequentially passing through the condenser, the expansion device, and the evaporator along the refrigerant pipe. The refrigerant passing through the evaporator exchanges heat with the cooling fluid provided outside. At this time, the temperature and pressure changes at the inlet and outlet of the condenser, the evaporator and the expansion device, and the refrigerant flow rate in the refrigerant pipe are measured. Thus, the performance of each component is measured.

  In addition, since the refrigeration cycle used in conventional air conditioners and refrigerators is provided in at least several kilowatts (kw) class, an apparatus for inspecting the performance of the components of these refrigeration cycles is equipped with such several kilowatts (kw). ) Class of refrigeration cycle, so that it can be applied to the performance inspection of heat exchangers and expansion devices, the compressor provided in the inspection device is also once according to the performance of such refrigeration cycle It is provided to compress a large amount of refrigerant.

  However, recently, as a micro-orifice is used as a small-capacity heat exchanger and expansion device, research on a refrigeration cycle having a capacity of several watts (w) is being actively conducted. Such a several watt (w) class refrigeration cycle is expected to be remarkable in the future development of ultra-small capacity compressors. However, the development of performance inspection devices that can efficiently measure the performance of expansion devices such as micro-orifices and small-capacity heat exchangers used in such small-capacity refrigeration cycles has not yet been made. is there.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a refrigeration cycle in which the performance of a small-capacity heat exchanger and a micro-orifice employed in a small-capacity refrigeration cycle can be efficiently measured. It is to provide a performance inspection device.

  In order to achieve this object, the performance inspection device for a refrigeration cycle according to the present invention is provided so that a condenser, an expansion device, and an evaporator to be measured can be sequentially attached, and a refrigerant pipe having both ends opened, A refrigerant heating device that is provided at one end of the refrigerant pipe on the condenser side and that heats the refrigerant and sends the refrigerant to the other end side of the refrigerant pipe; and the heat exchange with the refrigerant in the condenser and the evaporator A cooling fluid provided outside the condenser and the evaporator, a flow rate measuring device provided to measure the flow rate of the refrigerant on the refrigerant pipe, and a temperature and pressure change of the refrigerant by each measurement object are measured. And a temperature and pressure measuring device provided to measure the performance of the condenser, the expansion device and the evaporator.

  The expansion device includes a micro-orifice, and the refrigerant pipe between the refrigerant heating device and the micro-orifice is at least provided to filter impurities contained in the refrigerant and prevent the micro-orifice from being blocked. One filter is provided.

  Further, the filter includes a first filter provided between the condenser and the micro-orifice, and a second filter provided between the refrigerant heating device and the condenser. .

  Further, the first filter is provided to filter impurities smaller than the second filter.

  Furthermore, in the refrigerant pipe between the refrigerant heating device and the condenser, the temperature and pressure of the refrigerant heated by the hot water method and sent to the condenser are matched with the preset inlet conditions of the condenser. A first heater for adjusting the temperature of the refrigerant, and the expansion device includes a micro-orifice, and the refrigerant pipe between the micro-orifice and the evaporator has a temperature and a pressure of the refrigerant sent to the evaporator. A first pressure control valve for adjusting in accordance with a preset inlet condition of the evaporator is provided.

  Further, the refrigerant heating device is connected to one end of the refrigerant pipe and includes a refrigerant tank in which a refrigerant is placed, a water tank provided to surround the refrigerant tank and into which water is placed, and the water tank. And an electric heater provided outside the water tank for heating.

  Furthermore, the refrigerant heating device is provided to control the temperature of the refrigerant through a PID controller.

  Furthermore, an inlet for injecting the refrigerant into the refrigerant tank is provided on one side of the refrigerant tank.

  Furthermore, the first heater includes a water tank that is provided to surround the refrigerant pipe and into which water is placed, and an electric heater that is provided outside the water tank to heat the water tank. Features.

  Further, the first heater is provided to control the temperature of the refrigerant through a PID controller.

  Further, the temperature and pressure measurement device includes a temperature measurement sensor and a pressure measurement sensor provided in the refrigerant pipe on the inlet side and the outlet side of each measurement object.

  Further, the temperature and pressure measuring device further includes a temperature measuring instrument for sensing a temperature change of the cooling fluid.

  Further, the flow rate measuring device includes a refrigerant flow meter provided in the refrigerant pipe opposite to the refrigerant heating device, and a refrigerant flow meter in which the temperature and pressure of the refrigerant sent to the refrigerant flow meter are set in advance. A second heater and a second pressure control valve provided in the refrigerant pipe between the refrigerant flow meter and the evaporator are provided to be adjusted according to conditions.

  Furthermore, the second heater is provided to surround the refrigerant pipe, and includes a water tank into which water is placed, and an electric heater provided outside the water tank to heat the water tank. It is provided to heat the refrigerant by a method.

  Further, the second heater is provided to control the temperature of the refrigerant through a PID controller.

  Furthermore, a relief valve is provided in the middle of the refrigerant pipe to allow the refrigerant to flow out to the outside when the pressure of the refrigerant rises above a set value.

  Further, each of the measurement objects is a refrigeration cycle component provided with a capacity of several watts (w).

  Furthermore, the flow rate of the refrigerant on the refrigerant pipe is not more than several grams (g) per second.

  Further, the diameter of the micro-orifice is tens of micrometers (μm) or less.

  In order to achieve the above object, a performance inspection device for a refrigeration cycle according to the present invention is provided with a condenser pipe, an expansion device and an evaporator to be measured in order, and a refrigerant pipe having both ends opened, Measures the flow rate of the refrigerant on the refrigerant pipe, the refrigerant heating means for heating the refrigerant by the hot water method and sending it to one end side of the refrigerant pipe, the heat exchange means for exchanging heat with the refrigerant in the condenser and the evaporator A flow rate measuring means provided to measure the temperature and pressure change of the refrigerant by each measurement object, and the performance of the condenser, the expansion device and the evaporator is provided. It is provided for measurement.

  Further, the performance inspection device for the refrigeration cycle includes an auxiliary refrigerant heating means for adjusting a temperature and a pressure of the refrigerant sent to the condenser in accordance with a preset inlet condition of the condenser, and an evaporator. Pressure adjusting means for adjusting the temperature and pressure of the refrigerant to be sent in accordance with preset inlet conditions of the evaporator is provided.

  Further, the refrigeration cycle performance inspection apparatus further includes a temperature change sensing means for sensing a temperature change of the cooling fluid in the condenser and the evaporator.

  Further, the refrigeration cycle performance inspection apparatus further includes a temperature and pressure adjusting means for adjusting the temperature and pressure of the refrigerant sent to the flow rate measuring means in accordance with preset requirements of the flow rate measuring means. It is provided.

  The refrigeration cycle performance measuring apparatus according to the present invention includes a heating device for heating a refrigerant by a hot water method and a filter for preventing a micro-orifice clogging phenomenon. There is an advantage that the performance of the heat exchanger and the micro-orifice can be measured efficiently.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  The refrigeration cycle performance inspection apparatus according to the present invention is provided to measure the performance of a condenser, an evaporator and an expansion device employed in a several watt (w) class refrigeration cycle, and is shown in FIG. As described above, the condenser 1, the evaporator 3 and the micro-orifice 2 as the expansion device to be measured are provided so as to be attached midway, and the refrigerant pipe 10 having both ends opened is provided. At this time, the measurement objects 1, 2, and 3 are sequentially connected to the condenser 1, the micro-orifice 2, and the evaporator 3 from the one end side to the other end side of the refrigerant pipe 10 in the same manner as when actually attached to the refrigeration cycle. Is arranged.

  Inside the refrigerant pipe 10, the refrigerant flows so as to pass through the measurement objects 1, 2, and 3 in order. Here, the flow rate of the refrigerant is several grams (g) or less per minute when considering the capacity of the refrigeration cycle to which each measurement object 1, 2, 3 is actually applied. Each of the measuring objects 1, 2, and 3 is designed to have a small capacity so that it can be applied to such a small-capacity refrigeration cycle. In particular, the micro-orifice 2 used as an expansion device has several tens of micrometers. It is provided with a diameter of (μm).

  Moreover, the refrigerant | coolant heating apparatus 20 which enables a refrigerant | coolant to flow along the said refrigerant | coolant piping 10 is provided in the end of the refrigerant | coolant piping 10 by the side of the said condenser 1 by heating a refrigerant | coolant by a hot water bath system. Such a mechanism of the refrigerant heating device 20 has a minute flow rate by heating the refrigerant by a hot water bath method using water, because the compressor currently developed cannot control the flow of the refrigerant with such a fine flow rate. This is to make it possible to control the refrigerant more efficiently.

  The refrigerant heating device 20 is connected to one end of the refrigerant pipe 10 and is provided with a refrigerant tank 21 provided to contain the refrigerant therein, and a water tank 22 provided to surround the refrigerant tank 21 and into which water is contained. The electric heater 23 is provided outside the water tank 22 so that the water in the water tank 22 can be heated. For this reason, if the water tank 22 is heated via the electric heater 23, the refrigerant in the refrigerant tank 21 is heated while the temperature of the water in the water tank 22 rises, and the refrigerant formed by the pressure formed by the heating of the refrigerant. The refrigerant in the tank 21 goes to the refrigerant pipe 10. For reference, the unexplained reference numeral 24 is an inlet for injecting the refrigerant into the refrigerant tank 21.

  The refrigerant heating device 20 is provided to control the temperature of the refrigerant through a normal PID controller 30. The PID controller 30 is a proportional plus integral plus derivative (PID) control type temperature control device. Then, by continuously feeding back the temperature of the refrigerant in the refrigerant tank 21 and controlling the temperature of the electric heater 23, the refrigerant in the refrigerant tank 21 is automatically made to reach a preset temperature.

  The refrigerant sent to the refrigerant pipe 10 via the refrigerant heating device 20 passes through the condenser 1, the micro orifice 2 and the evaporator 3 in order, and then passes through the refrigerant pipe 10 on the side opposite to the refrigerant heating device 20. Although it flows out outside, the cooling fluids 40 and 50 are provided outside the condenser 1 and the evaporator 3 so as to exchange heat with the refrigerant passing through the condenser 1 and the evaporator 3. For this reason, the refrigerant flowing along the refrigerant pipe 10 is subjected to heat exchange with the cooling fluid 40 in the condenser 1 to be condensed, and then expanded through the micro-orifice 2, and further to the cooling fluid 50 in the evaporator 3. While evaporating while performing heat exchange, the performance of each of the measurement objects 1, 2, and 3 is measured by measuring the temperature and pressure changes of the refrigerant and the flow rate of the refrigerant flowing along the refrigerant pipe 10 in this process. Is done.

More specifically, the refrigerant pipe 10 is provided with a temperature and pressure measuring device for measuring the temperature and pressure change of the refrigerant that is changed through each of the measurement objects 1, 2, and 3. This temperature and pressure measuring device includes a temperature measuring sensor T and a pressure measuring sensor P provided in the refrigerant pipes 10 on the inlet side and the outlet side of the respective measuring objects 1, 2 and 3. For this reason, the temperature and pressure changes of the refrigerant changed by the respective measurement objects 1, 2, and 3 are measured by the respective measurement objects 1, 2, and 3 measured through the respective temperature measurement sensors T and P. Measurement is possible by comparing the temperature and pressure at the outlet side with the temperature and pressure at the inlet side.
The cooling fluids 40 and 50 pass through the outside of the evaporator 3 and the first cooling fluid 40 provided to exchange heat with the refrigerant in the condenser 1 through the outside of the condenser 1. And a second cooling fluid 50 provided to exchange heat with the refrigerant in the evaporator 3.

  In addition, the pipes of the cooling fluids 40 and 50 have temperatures for measuring the temperatures of the cooling fluids 40 and 50 before passing through the condenser 1 and the evaporator 3 and after passing through the condenser 1 and the evaporator 3. A temperature measuring instrument having a measuring sensor T ′ and a cooling fluid flow meter F ′ provided to measure the flow rates of the cooling fluids 40, 50 is provided, the temperature and pressure measuring device being such a temperature measuring device. It further comprises an instrument. Such a temperature measuring instrument measures the temperature changes of the cooling fluids 40 and 50 when the changes in the temperature and pressure of the refrigerant that has passed through the condenser 1 and the evaporator 3 are slight, whereby the condenser 1 and the evaporator 3 are measured. This is provided to make it possible to estimate the heat exchange amount of the refrigerant. Further, the refrigerant pipe 10 is provided with a flow rate measuring device having a refrigerant flow meter F so as to measure the flow rate of the refrigerant flowing along the refrigerant pipe 10.

  On the other hand, since the micro orifice 2 provided with a diameter of several tens of micrometers (μm) or less is highly likely to be blocked, the refrigerant pipe 10 between the refrigerant heating device 20 and the micro orifice 2 is included in the refrigerant. Filters 61 and 62 are provided for filtering the impurities present to prevent the micro orifice 2 from being blocked.

  These filters 61 and 62 are provided as a main filter between the condenser 1 and the micro-orifice 2, a first filter that filters impurities contained in the refrigerant immediately in front of the micro-orifice 2, and an auxiliary filter A second filter 62 is provided between the refrigerant heating device 20 and the condenser 1 and first filters the impurities contained in the refrigerant prior to the first filter 61.

  At this time, only one of the filters 61 and 62 may be provided, and the second filter 62 provided to primarily filter impurities may be provided so that larger impurities than the first filter 61 can be filtered. Thus, the impurities contained in the refrigerant may be sequentially filtered according to the size through the respective filters 61 and 62.

  Further, since the capacities of the condenser 1 and the evaporator 3 are determined according to the capacity of the refrigeration cycle to which the condenser 1 and the evaporator 3 are applied at the time of designing, the inlets of the condenser 1 and the evaporator 3 are used. The refrigerant sent to the side needs to be adjusted to a temperature and pressure state suitable for the inlet conditions of the condenser 1 and the evaporator 3 set in advance before flowing into the condenser 1 and the evaporator 3, respectively. Based on the above, the pressure of the refrigerant that has passed through the condenser 1 and the evaporator 3 and the degree of temperature change are measured.

  Accordingly, the refrigerant pipe 10 between the refrigerant heating device 20 and the condenser 1 is provided with a refrigerant in order to adjust the temperature and pressure of the refrigerant sent to the condenser 1 to meet the preset inlet conditions of the condenser 1. The first heater 70 is provided for heating the hot water by a hot water bath method, and the refrigerant pipe 10 between the micro orifice 2 and the evaporator 3 is provided with the evaporator 3 in which the temperature and pressure of the refrigerant sent to the evaporator 3 are set in advance. A first pressure regulating valve 80 is provided for adjusting to meet the inlet conditions.

  The first heater 70 is provided so as to surround the refrigerant pipe 10, and includes a water tank 71 into which water is placed and an electric heater 72 provided outside the water tank 71 to heat the water tank. The first heater 70 is provided to heat the refrigerant by a hot water method similar to the refrigerant heating device 20, but this can accurately adjust the temperature and pressure of the fine flow rate refrigerant to control the inlet condition of the condenser 1. This is because the first heater 70 is provided so as to heat the refrigerant through the control of the PID controller 30 of the same type as the refrigerant heating device 20.

  The first pressure regulating valve 80 is mounted between the micro-orifice 2 and the evaporator 3 so that the micro-orifice 2 provided as an expansion device is not a variable type but a fixed type. The first heater 70 and the first pressure regulating valve 80 are provided on the inlet side of each of the condenser 1 and the evaporator 3. By satisfying the refrigerant temperature and pressure conditions, simultaneous measurement of the condenser 1 and the evaporator 3 becomes possible.

  In this embodiment, the refrigerant flow meter F is attached to the refrigerant pipe 10 on the side opposite to the refrigerant heating device 20 and is provided to measure the flow rate of the refrigerant flowing into the gas state. In order to accurately measure the flow rate of the refrigerant with the refrigerant flow meter F, the temperature and pressure of the refrigerant sent to the refrigerant flow meter F are determined within a preset range according to the characteristics of the refrigerant flow meter F. For this purpose, the flow rate measuring device is provided between the refrigerant flow meter F and the evaporator 3 so as to adjust the temperature and pressure of the refrigerant sent to the refrigerant flow meter F in accordance with preset conditions of the refrigerant flow meter F. The second heater 90 and the second pressure regulating valve 100 are further provided. At this time, the second heater 90 includes a refrigerant tank 91 and an electric heater 92 provided in the same type as the first heater 70 and heats the refrigerant by a hot water bath method. At this time, the refrigerant heater 20 and the first heater 70 are heated. The refrigerant is heated by the same control as the PID controller 30 that controls the above.

  Preferably, a relief valve 110 is provided on one side of the refrigerant pipe 10 to prevent a safety accident by causing the refrigerant to flow out of the refrigerant pipe 10 when the pressure of the refrigerant rises above a set value. More preferably, the relief valve 110 is provided between the refrigerant heating device 20 and the first heater 70 so that the refrigerant that has passed through the refrigerant heating device 20 can flow out to the outside before being further heated by the first heater 70. Is provided.

  Hereinafter, the operation and effect of the refrigeration cycle performance inspection apparatus according to the present invention having such a configuration will be described in detail.

  In the middle of the refrigerant pipe 10 in the performance inspection apparatus for the refrigeration cycle in which the condenser 1, the micro-orifice 2 and the evaporator 3 to be measured are designed according to the capacity of the refrigeration cycle to be applied. If the refrigerant | coolant injected into the refrigerant | coolant tank 21 of the refrigerant | coolant heating apparatus 20 in this state is heated by a hot water bath method in this state, the refrigerant | coolant in the refrigerant | coolant tank 21 will be the refrigerating cycle to which each measuring object 1,2,3 is applied. The refrigerant is supplied to the refrigerant pipe 10 side in accordance with the flow rate.

  The refrigerant first passes through the first heater 70 and is sent to the condenser 1 in a state in which the temperature and pressure thereof are adjusted to meet a preset inlet condition of the condenser 1. The refrigerant sent to the condenser 1 is condensed while exchanging heat with the first cooling fluid 40, further expanded through the micro orifice 2, and then the temperature and pressure are preliminarily adjusted by the first pressure control valve 80. It is sent to the evaporator 3 in a state adjusted to meet the set inlet condition of the evaporator 3. The refrigerant sent to the evaporator 3 is evaporated while exchanging heat with the second cooling fluid 50 in the evaporator 3, and the temperature and pressure of the refrigerant are passed through the second pressure control valve 100 and the second heater 90. After being sent to the refrigerant flow meter F in a state adjusted to meet a preset condition of the refrigerant flow meter F, it is discharged to the outside of the refrigerant pipe 10.

  At this time, the performance of each measurement object 1, 2, 3 is that the refrigerant measured by the temperature measurement sensor T and the pressure measurement sensor P provided on the inlet side and the outlet side of each measurement object 1, 2, 3 By measuring the temperature and pressure values and the flow rate value of the refrigerant measured by the refrigerant flow meter F, and comparing these measured values with the design values of the respective measurement objects 1, 2, 3, each measurement object 1, 2 , 3 are evaluated.

  Further, in the process of measuring the performance of each of these measurement objects 1, 2, 3, the micro-orifice 2 provided at a diameter of several tens of micrometers (μm) is included in the refrigerant sent from the condenser 1. Since the irregular materials are filtered through the first filter 61 and the second filter 62, the clogging phenomenon is prevented, and the refrigerant heating device 20 and the heaters 70 and 90 perform refrigerant temperature control by the PID controller 30. In addition to being able to do this automatically, it is possible to safely adjust the temperature of a refrigerant with a slight crime flow rate to a desired temperature.

It is a whole block diagram of the performance inspection apparatus of the refrigerating cycle by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Condenser 2 Micro orifice 3 Evaporator 10 Refrigerant piping 20 Refrigerant heating device 21 Refrigerant tank 22 Water tank 23 Electric heater 24 Inlet 30 PID controller 40, 50 Cooling fluid 61, 62 Filter 70 First heater 71 Water tank 72 Electric heater 80 First pressure regulating valve 90 First heater 91 Refrigerant tank 92 Electric heater 100 Second pressure regulating valve 110 Relief valve F, F ′ Refrigerant flow meter P Pressure measuring sensor T, T ′ Temperature measuring sensor

Claims (21)

A refrigerant pipe which is provided so that a condenser, an expansion device and an evaporator to be measured can be sequentially attached in the middle, and both ends are opened;
A refrigerant heating device that is provided at one end of the refrigerant pipe on the condenser side and heats the refrigerant and sends it to the other end side of the refrigerant pipe;
A cooling fluid provided respectively outside the condenser and the evaporator to exchange heat with the refrigerant in the condenser and the evaporator;
A flow rate measuring device provided to measure the flow rate of the refrigerant on the refrigerant pipe;
A temperature and pressure measuring device provided to measure the temperature and pressure change of the refrigerant according to each of the measurement objects; and a small capacity heat exchanger comprising :
A refrigeration cycle performance inspection device provided to measure the performance of the condenser, expansion device, and evaporator, which is a refrigeration cycle component having a capacity of several watts (w), which is a measurement target . The expansion device comprises a micro-orifice;
The refrigerant pipe between the refrigerant heating device and the micro-orifice is provided with at least one filter for filtering impurities contained in the refrigerant to prevent clogging of the micro-orifice. The performance inspection device for a refrigeration cycle according to claim 1. The filter is
A first filter provided between the condenser and the micro-orifice;
The refrigeration cycle performance inspection apparatus according to claim 2, further comprising a second filter provided between the refrigerant heating device and the condenser.     The refrigeration cycle performance inspection apparatus according to claim 3, wherein the first filter is provided to filter impurities smaller than the second filter. In the refrigerant pipe between the refrigerant heating device and the condenser, the temperature and pressure of the refrigerant heated by a hot water method and sent to the condenser are adjusted in accordance with preset inlet conditions of the condenser. A first heater is provided to
The expansion device comprises a micro-orifice;
The refrigerant pipe between the micro-orifice and the evaporator has a first pressure adjustment for adjusting the temperature and pressure of the refrigerant sent to the evaporator according to preset inlet conditions of the evaporator. The refrigeration cycle performance inspection apparatus according to claim 1, wherein a valve is provided. The refrigerant heating device includes:
A refrigerant tank connected to one end of the refrigerant pipe and into which a refrigerant is placed;
A water tank provided to surround the refrigerant tank and into which water is placed;
The refrigeration cycle performance inspection apparatus according to claim 1, further comprising: an electric heater provided outside the water tank to heat the water tank.   The performance inspection device for a refrigeration cycle according to claim 1, wherein the refrigerant heating device is provided to control the temperature of the refrigerant through a PID controller.   The refrigeration cycle performance inspection apparatus according to claim 6, wherein an inlet for injecting the refrigerant into the refrigerant tank is provided on one side of the refrigerant tank. The first heater is
A water tank which is provided to surround the refrigerant pipe and into which water is placed;
The refrigeration cycle performance inspection apparatus according to claim 5, further comprising an electric heater provided outside the water tank to heat the water tank.   The refrigeration cycle performance inspection apparatus according to claim 5, wherein the first heater is provided to control the temperature of the refrigerant through a PID controller. The temperature and pressure measuring device is:
A temperature measurement sensor provided in the refrigerant pipe on the inlet side and outlet side of each measurement object;
The refrigeration cycle performance inspection apparatus according to claim 1, further comprising a pressure measurement sensor.   The refrigeration cycle performance inspection apparatus according to claim 11, wherein the temperature and pressure measurement device further includes a temperature measurement instrument for sensing a temperature change of the cooling fluid. The flow rate measuring device includes:
A refrigerant flow meter provided in the refrigerant pipe opposite to the refrigerant heating device;
A second heater provided in the refrigerant pipe between the refrigerant flow meter and the evaporator so as to adjust the temperature and pressure of the refrigerant sent to the refrigerant flow meter in accordance with preset conditions of the refrigerant flow meter. The refrigeration cycle performance measuring apparatus according to claim 1, further comprising: and a second pressure regulating valve. The second heater is
A water tank which is provided to surround the refrigerant pipe and into which water is placed;
An electric heater provided outside the water tank to heat the water tank,
The refrigeration cycle performance inspection apparatus according to claim 13, which is provided to heat the refrigerant by a hot water method.   The refrigeration cycle performance inspection apparatus according to claim 13, wherein the second heater is provided to control the temperature of the refrigerant through a PID controller.   The performance inspection of the refrigeration cycle according to claim 1, wherein a relief valve is provided in the middle of the refrigerant pipe to allow the refrigerant to flow outside when the pressure of the refrigerant rises above a set value. apparatus.   The performance inspection device for a refrigeration cycle according to claim 1, wherein the flow rate of the refrigerant on the refrigerant pipe is several grams (g) or less per minute.   3. The refrigeration cycle performance inspection apparatus according to claim 2, wherein the diameter of the micro-orifice is several tens of micrometers (μm) or less.   The refrigeration cycle performance inspection apparatus according to claim 1, wherein the refrigerant heating device is provided to heat the refrigerant by a hot water method.   The refrigeration cycle performance inspection device according to claim 2, wherein the at least one filter prevents impurities from being blocked by filtering impurities contained in the refrigerant.   The refrigeration cycle performance inspection apparatus according to claim 1, wherein both ends of the refrigerant pipe are open.

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