JP6336800B2 - Method and apparatus for calculating the amount of production heat during heating operation of an air heat source heat pump - Google Patents

Description

  The present invention relates to a calculation method and a calculation device for the amount of production heat during heating operation of an air heat source heat pump.

  As a building air conditioning system, an air heat source heat pump using air as a heat source is widely used. In recent years, there has been an increasing demand for evaluation of the air conditioning capacity of an air conditioning system in a building that is in operation, and various proposals have been made regarding methods for measuring the air conditioning capacity of an air conditioning system. In relation to this, Patent Document 1 describes the temperatures of the suction air sucked into the outdoor unit and the blown air discharged from the outdoor unit through heat exchange with the refrigerant compressed or expanded in the outdoor unit. A measurement system is disclosed that calculates the air conditioning capacity at the time of cooling and heating based on the difference in enthalpy calculated based on the air state of each air consisting of the information on the humidity and the humidity and the air volume of the fan of the outdoor unit.

JP 2010-38487 A JP 2007-309628 A JP 2008-249258 A JP 2011-214736 A

  In the above-described conventional technology, a temperature and humidity meter is installed in the vicinity of the suction port for the suction air and the discharge port for the blow-out air in the outdoor unit, and the temperature and humidity of the suction air and the blow-out air are detected. By the way, when the air heat source heat pump is heated, the air sucked into the outdoor unit from the outside is cooled and dehumidified by heat exchange with the refrigerant and then released from the outdoor unit. Therefore, the relative humidity of the blown air is often close to 100%, and the temperature / humidity meter installed at the blowout air outlet of the outdoor unit may condense or freeze. On the other hand, thermohygrometers often have a structure in which a polymer film for detecting humidity is exposed, and there is a risk of malfunction due to condensation or icing.

  On the other hand, a thermometer generally has a thermistor for detecting temperature coated with a fluororesin or the like, and can be said to have a structure that is less likely to fail than a thermohygrometer. However, when calculating the production heat quantity of the air heat source heat pump based on the temperature difference between the intake air sucked into the outdoor unit and the blown air released from the outdoor unit after exchanging heat with the refrigerant in the heat exchanger, the latent heat The amount of production heat cannot be calculated in consideration of the change. Therefore, at the time of heating operation of the air heat source heat pump, there is a concern that the calculation accuracy of the production heat quantity deteriorates.

  This invention is made in view of the said subject, Comprising: The objective is providing the technique which can calculate manufacturing calorie | heat amount accurately, suppressing failure of sensors, also at the time of the heating operation of an air heat source heat pump. It is in.

In order to solve the above-described problems, a method for calculating the amount of production heat or a calculation device thereof according to the present invention includes a suction air temperature, a blown air temperature, a temperature around an outdoor unit, and a blowout measured simultaneously. The absolute humidity of the intake air and the absolute humidity of the blown air are determined based on the temperature and relative humidity of the air surrounding the outdoor unit at a predetermined outdoor unit peripheral part away from the mouth and the suction port. The greatest feature is to determine whether to calculate the production heat quantity based on either the temperature difference or the enthalpy difference of the blown air.

  More specifically, the present invention relates to an outdoor unit having a heat exchanger and a fan, and an indoor unit that supplies air conditioned by the outdoor unit to a room of a building during heating operation. A calculation method executed by a computer for calculating the amount of heat, which is measured at the same time, the temperature of the intake air sucked into the outdoor unit from the inlet of the outdoor unit, and heat exchange with the refrigerant in the heat exchanger The temperature of the blown air discharged to the outside from the blowout port of the outdoor unit after performing the operation, and the vicinity of the outdoor unit around the outdoor unit and in a predetermined outdoor unit peripheral part away from the blowout port and the suction port Acquire measurement data relating to the temperature and relative humidity of the air, and obtain the absolute humidity of the intake air and the absolute humidity of the blown air based on the acquired measurement data Based on the magnitude relationship between the absolute humidity of the intake air and the absolute humidity of the blown air determined in the absolute humidity acquisition step and the absolute humidity of the blown air, the temperature difference and the enthalpy difference between the intake air and the blown air A determination step of determining any one as a calculation parameter for calculating the production heat amount, and a production heat amount calculation step of calculating the production heat amount based on the calculation parameter determined in the determination step and the air volume of the fan. Including.

  According to the present invention, the blowout port and the suction port of the outdoor unit, particularly the blowout port where the relative humidity is very high and the cold air is released during heating operation, is more resistant to dew condensation, icing, and the like than the thermometer. However, since it is not necessary to install a low temperature and humidity meter, it is possible to calculate the production heat amount of the air heat source heat pump while suppressing failure of the sensors.

  In the present invention, the absolute humidity of the intake air and the absolute value of the blown air based on the temperature of the intake air, the temperature of the blown air measured at the same time, the temperature of the outdoor unit surrounding air in the periphery of the outdoor unit, and the relative humidity are measured. Since the humidity is determined and either the temperature difference or the enthalpy difference between the intake air and the blown air is selected based on the magnitude relationship, it is determined as a calculation parameter for calculating the production heat quantity. In the case where the intake air does not undergo a latent heat change during heat exchange, the temperature difference is determined as a calculation parameter. On the other hand, in the case of a latent heat change, the enthalpy difference can be determined as a calculation parameter. In the former situation, the temperatures of the intake air and the blow-out air can be directly detected by a thermometer that has better responsiveness than a thermohygrometer. Therefore, the air based on the detected value of such a thermometer By calculating the manufacturing heat quantity of the heat source heat pump, the calculation accuracy can be increased. On the other hand, in the latter situation, the calculation accuracy can be ensured by calculating the production heat quantity of the air heat source heat pump based on the change in the enthalpy of air. In this case, the measured values of the temperature and relative humidity of the outdoor unit ambient air are used to calculate the production heat quantity, but the outdoor unit peripheral part away from the outlet and the suction port in the outdoor unit is originally It can be said that the rapid thermal environment hardly changes. Therefore, for example, it becomes difficult to be affected by responsiveness when measuring the temperature and relative humidity of the air around the outdoor unit with a thermohygrometer, and it is possible to suppress a decrease in measurement accuracy.

  Here, when the absolute humidity of the blown air is equal to or higher than the absolute humidity of the suction air, a temperature difference between the blown air and the suction air is determined as the calculation parameter, and the absolute humidity of the blown air is set to be equal to that of the suction air. When the humidity is lower than the absolute humidity, an enthalpy difference between the blown air and the intake air may be determined as the calculation parameter. According to this, since the calculation parameter can be determined according to whether or not the intake air that exchanges heat with the refrigerant in the heat exchanger of the outdoor unit involves a change in latent heat, the production heat quantity of the air heat source heat pump is accurately calculated. be able to.

  In the present invention, in the absolute humidity acquisition step, the absolute humidity obtained based on the measured temperature and relative humidity of the ambient air around the outdoor unit is acquired as the absolute humidity of the intake air, and the blowout The absolute humidity of the blown air may be acquired based on the relative humidity of the blown air acquired on the assumption that the relative humidity of the air is a predetermined specified value and the measured temperature of the blown air. Good.

  Further, the temperatures of the suction air and the blowout air are measured by thermometers installed in the vicinity of the suction port and the blowout port, respectively, and a cover member that covers the sensor portion is attached to the thermometer, The cover member may be formed with an opening window for guiding air to the sensor unit. The temperature and relative humidity of the ambient air around the outdoor unit are measured by a thermohygrometer installed around the outdoor unit, and the thermohygrometer is provided with a cover member that covers the sensor unit, An opening window for guiding air to the sensor unit may be formed in the cover member. By adopting such a structure, it is possible to guide the air to the sensor unit through the opening window while suppressing direct sunlight and rain / snow from directly hitting the sensor unit by the cover member, thereby suppressing the failure of the sensor unit. However, it is possible to improve the measurement accuracy.

  The production heat quantity calculation device according to the present invention is an air heat source heat pump comprising: an outdoor unit having a heat exchanger and a fan; and an indoor unit that supplies air conditioned by the outdoor unit to a room of a building. A calculation device for calculating the amount of production heat during heating operation, the temperature of the intake air sucked into the outdoor unit from the inlet of the outdoor unit measured at the same time, and the refrigerant and heat in the heat exchanger After the replacement, the temperature of the blown air discharged to the outside from the blowout port of the outdoor unit, and the outdoor unit in the vicinity of the outdoor unit and at a predetermined outdoor unit peripheral part away from the blowout port and the suction port Absolute humidity that obtains measurement data related to ambient air temperature and relative humidity, and calculates absolute humidity of the intake air and absolute humidity of the blown air based on the obtained measurement data Based on the magnitude relationship between the absolute humidity of the intake air and the absolute humidity of the blown air obtained by the obtaining unit and the absolute humidity acquisition unit, any of the temperature difference and enthalpy difference of the intake air and the blown air Is determined as a calculation parameter for calculating the production heat amount, and a production heat amount calculation unit that calculates the production heat amount based on the calculation parameter determined by the determination unit and the air volume of the fan.

  The means for solving the problems in the present invention can be combined as much as possible.

  ADVANTAGE OF THE INVENTION According to this invention, even at the time of heating operation of an air heat source heat pump, the technique which can calculate a manufacturing calorie | heat amount accurately can be provided, suppressing failure of sensors.

Drawing 1 is a schematic structure figure of an air heat source heat pump concerning an embodiment. FIG. 2 is a hardware configuration diagram of a production heat quantity calculation device that calculates the production heat quantity of the air source heat pump according to the embodiment. FIG. 3 is a diagram illustrating an arrangement state of various sensors installed around the outdoor unit according to the embodiment. FIG. 4 is a diagram illustrating a detailed structure of the first thermometer, the second thermometer, and the temperature / humidity meter according to the embodiment. FIG. 5 is a diagram illustrating a state in which data measured and collected by various measuring devices is taken into the heat quantity calculation apparatus 10 via a portable recording medium. FIG. 6 is a diagram showing a calculation flow for calculating the amount of production heat during the heating operation of the air heat source heat pump. FIG. 7 is a diagram illustrating each functional unit of the information processing apparatus in the manufacturing calorie calculation apparatus. FIG. 8 is an air line diagram for explaining a calculation flow of the production heat quantity.

  Hereinafter, embodiments of the present invention will be exemplarily described in detail with reference to the drawings. Note that the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are intended to limit the technical scope of the invention to those unless otherwise specified. is not.

  FIG. 1 shows a schematic configuration of an air heat source heat pump 1 in the present embodiment. The air heat source heat pump includes an outdoor unit 2 and an indoor unit 3 (in FIG. 1, four indoor units 3a to 3d are collectively referred to as an indoor unit 3) for air conditioning the room 4a of the building 4. Prepare. The air heat source heat pump shown in FIG. 1 mainly circulates the refrigerant via the circulation path 9 between the outdoor unit 2 and the outdoor unit 2 arranged outside the building 4, for example, on the rooftop floor. It is comprised from the indoor unit 3 which air-conditions air conditioning with respect to the indoor 4a.

  Inside the outdoor unit 2, a compressor 21, a fan 22, and a heat exchanger 23 are provided. During cooling, the refrigerant is compressed by the compressor 21 and condensed in the heat exchanger 23 (expansion by an expansion valve during heating). Evaporation in the heat exchanger 23 is performed, and heat exchange with the outside air is performed on the refrigerant by the rotation of the fan 22. At this time, the air sucked into the outdoor unit 2 from the outside by the rotation of the fan 22, specifically, the place where heat exchange with the refrigerant compressed and expanded by the compressor 21 is referred to as “suction air”. The air that is exchanged with the refrigerant and discharged from the outdoor unit 2 will be referred to as “blowing air”.

  On the side of the outdoor unit 2, a suction port 24 for taking in the intake air into the outdoor unit 2 is provided. In addition, an outlet 25 is provided above the outdoor unit 2 for discharging the air after heat exchange with the refrigerant in the heat exchanger 23 from the outdoor unit 2. In FIG. 1, the flow of the suction air and the blown air is indicated by arrows, that is, the suction air flows into the inside from the suction port 24 of the outdoor unit 2 by the rotation of the fan 22, and the blown air from the blowout port 25 of the outdoor unit 2. Is released.

  In the air heat source heat pump 1 configured as described above, the outdoor unit 2 and the indoor unit 3 are controlled by an air conditioning control unit (not shown), and various air conditionings are performed in the indoor 4a. In addition, although detailed description of the specific air-conditioning control itself by the air heat source heat pump 1 is omitted, various conventional air-conditioning controls can be applied.

FIG. 2 is a hardware configuration diagram of the production heat quantity calculation device 10 that calculates the production heat quantity of the air heat source heat pump 1. The production calorie calculation device 10 is constituted by, for example, a general-purpose computer, and includes an information processing device 11 having a CPU 11a as a central processing unit and a memory 11b as a storage device, an input device 12 including a keyboard and a mouse, a display, and the like. A display device 13, a communication interface 14, a portable recording medium driving device 15 and the like are provided. The input device 12 receives information input and various setting operations. The CPU 11a executes various programs stored in the memory 11b, and calculates the production heat quantity of the air heat source heat pump 1. The portable recording medium driving device 15 drives a portable recording medium such as a flash memory card, and reads data recorded on the portable recording medium. The data read by the portable recording medium driving device 15 is output to the CPU 11a. In addition, you may comprise the manufacturing calorie | heat amount calculation apparatus 10 with a tablet terminal and a portable terminal. The computer, tablet terminal, and portable terminal only accept information and display the calculation result, and the amount of heat produced by the air heat source heat pump 1 on the computer, tablet terminal, and server connected to the portable terminal via the network. May be calculated. In this case, the calculation result of the manufacturing heat quantity may be transmitted to a computer, a tablet terminal, a portable terminal, etc. connected via a network.

  When calculating the amount of production heat in the air heat source heat pump 1, the air state of the intake air and the blown air is measured over a predetermined measurement period by various sensors installed around the outdoor unit 2. The measurement data collected in this way is transferred to the production heat quantity calculation device 10 and is subjected to various arithmetic processes by the information processing apparatus 11, whereby the production heat quantity of the air heat source heat pump 1 is calculated. Note that the measurement period for measuring the air state of the intake air and the blown air is not particularly limited, but may be, for example, several weeks.

  Next, with reference to FIG. 3, the arrangement | positioning condition of the various sensors installed in the periphery of the outdoor unit 2 is demonstrated. In the outdoor unit 2, a first thermometer 5 and a second thermometer 6 are installed at a position P1 near the suction port 24 and a position P2 near the blowout port 25, respectively. The first thermometer 5 is a sensor for detecting the temperature of the intake air, which is installed on a path when the intake air flows into the outdoor unit 2 through the intake port 24. Further, the second thermometer 6 is a sensor for detecting the temperature of the blown air, which is installed on a path when the blown air is discharged from the outdoor unit 2 to the outside through the blowout port 25.

  In FIG. 3, reference numeral 30 denotes a gantry on which the outdoor unit 2 is placed, and reference numeral 31 denotes a gantry foundation that supports the gantry 30. The gantry foundation 31 is made of, for example, concrete, and is provided with a pair at a predetermined interval. The gantry 30 and the outdoor unit 2 are supported by the pair of gantry foundations 31. A thermohygrometer 7 is installed between the pair of gantry bases 31, that is, in a lower space of the outdoor unit 2 (hereinafter referred to as “outdoor unit peripheral part”) P <b> 3. The outdoor unit peripheral part P3 in which the temperature / humidity meter 7 is installed is around the outdoor unit 2 and is relatively distant from the blowout port 25 and the suction port 24. The term “separated” from the blowout port 25 (suction port 24) here refers to the path of air discharged from the outdoor unit 2 (flowing into the outdoor unit 2) through the blowout port 25 (suction port 24). This means that the thermo-hygrometer 7 is not arranged. It can be said that the lower space of the outdoor unit 2 in which the thermohygrometer 7 is installed is a shaded and well-ventilated space. The thermohygrometer 7 is a sensor that detects the temperature and humidity of air (hereinafter referred to as “outdoor unit ambient air”) in the outdoor unit peripheral part P3 that is well-ventilated in the shade.

  FIG. 4 is a diagram illustrating a detailed structure of the first thermometer 5, the second thermometer 6, and the temperature and humidity meter 7 according to the embodiment. The first thermometer 5, the second thermometer 6 and the thermohygrometer 7 have a data logger 101, a sensor unit 102, a cable 103 connecting the data logger 101 and the sensor unit 102, a cover member 104, and the like. . The data logger 101 is a recorder (recording device) that stores various data measured and collected by the sensor unit 102. The data logger 101 includes a liquid crystal display unit, a control unit for controlling the overall operation of the instrument, a communication interface, a portable recording medium driving device, a battery, and the like. The portable recording medium driving device can drive a portable recording medium such as a flash memory card. In the present embodiment, the first thermometer 5 and the second thermometer 6 have the same structure, and a thermistor is employed for the sensor unit 102, and this thermistor is coated with a fluororesin or the like. On the other hand, the sensor unit 102 in the thermohygrometer 7 has a thermistor for detecting the temperature of the air and a polymer film for detecting the humidity of the air, and this polymer film is exposed to the outside. It has a structure. The first thermometer 5 and the second thermometer 6 are more responsive than the thermohygrometer 7.

The cover member 104 is a cylindrical body that houses the sensor unit 102, and a hole for inserting the sensor unit 102 and the cable 103 is formed in one end surface. The sensor unit 102 and the cable 103 are inserted through the holes formed in the end surface of the cover member 104, so that the sensor unit 102 is accommodated in the accommodation space formed in the cover member 104. Further, an opening window (opening) 104 a is formed on the side surface of the cover member 104, and this opening window 1
The air can be guided to the sensor unit 102 through 04a. According to the cover member 104 configured as described above, it is possible to suppress direct sunlight and rain / snow from directly hitting the sensor unit 102 of each sensor such as the first thermometer 5, the second thermometer 6, and the temperature and humidity meter 7. However, since the air can be guided to the sensor unit 102, the measurement accuracy can be increased.

  Furthermore, an ammeter 8 that measures the current value of the fan current supplied to drive the fan 22 that forms the flow of the intake air and the blown air is installed inside the outdoor unit 2 in the air heat source heat pump 1. (See FIG. 1). As the fan ammeter 8, for example, a clamp ammeter can be used. The fan ammeter 8 includes a data logger that records measurement data. The data logger of the fan ammeter 8 is provided with a portable recording medium driving device for driving a portable recording medium such as a flash memory card, and the collected measurement data is stored in a portable recording medium (for example, a flash memory card). ) Can be recorded.

  Here, reference numeral 40 shown in FIG. 1 is a power supply line connected from the power panel 41 to the outdoor unit 2. The power panel 41 is provided with a wattmeter 42 that measures the power supplied to the outdoor unit 2 through the power supply line 41. As the wattmeter 42, for example, a clamp-type wattmeter may be used. The wattmeter 42 includes a data logger that records measurement data. The data logger includes a portable recording medium driving device that drives a portable recording medium such as a flash memory card. The measurement data measured and collected by the wattmeter 42 can be recorded on a portable recording medium (for example, a flash memory card). Note that the wattmeter 42 may be installed inside the outdoor unit 2, and the power supplied to the compressor 21 may be measured by the wattmeter 42.

  In the present embodiment, as shown in FIG. 5, the various measuring devices described above, specifically, the first thermometer 5, the second thermometer 6, the temperature and humidity meter 7, and the fan ammeter over a certain period of time. 8. Data measured / collected by the wattmeter 42 is taken into the heat quantity calculation device 10 via a portable recording medium such as a flash memory card (symbol FM in the figure), and the measurement data taken into the production heat quantity calculation device 10 Is used to calculate the production heat quantity of the air heat source heat pump 1. By the way, a method is known in which the difference between the enthalpies of the intake air and the blown air in the outdoor unit of the air conditioning system is calculated, and the air conditioning capability of the system is obtained based on the difference between the enthalpies. However, when the air heat source heat pump 1 is heated, the intake air sucked into the outdoor unit 2 is cooled and dehumidified by heat exchange with the refrigerant and then released from the outdoor unit 2, so that the relative humidity of the blown air is Often close to 100%. On the other hand, a thermohygrometer has a polymer film for detecting humidity exposed to the outside as described above, and cannot be said to be a structure that is strong against dew condensation or icing. Therefore, if a temperature / humidity meter is installed at the outlet 25 of the outdoor unit 2 to measure the temperature and humidity of the blown air, the temperature / humidity meter may break down due to condensation, especially in the winter, due to icing or the like. . In other words, during the heating operation of the air heat source heat pump, it can be said that a major problem is how to prevent the failure of the sensor installed in the vicinity of the outlet 25 of the outdoor unit 2.

  In this respect, the thermometer has a thermistor coated with a fluororesin as described above, and can be said to have a structure that is more resistant to condensation and icing than a thermohygrometer. However, when calculating the production heat quantity of the air heat source heat pump 1 based on the temperature difference between the intake air sucked into the outdoor unit 2 and the blown air released from the outdoor unit 2 after exchanging heat with the refrigerant, latent heat is calculated. Since it cannot be taken into consideration, there is a concern that the calculation accuracy of the production heat quantity may be deteriorated depending on the operation state of the air heat source heat pump 1.

Therefore, in the present embodiment, the absolute humidity of the intake air and the blown air based on the measurement data obtained by the first thermometer 5, the second thermometer 6, and the temperature / humidity meter 7 installed around the outdoor unit 2. Determining the absolute humidity, and determining whether the production heat quantity in the air heat source heat pump 1 should be calculated based on the temperature difference or enthalpy difference between the intake air and the blown air based on the magnitude relationship of the absolute humidity of each air It was.

  FIG. 6 is a diagram showing a calculation flow for calculating the amount of production heat during the heating operation of the air heat source heat pump 1. The calculation flow shown in FIG. 6 can be performed by using a computer related to the information processing apparatus 11 of the manufacturing heat quantity calculation device 10. For example, the CPU 11a executes a manufacturing heat quantity calculation program stored in the memory 11b. Each processing is realized. FIG. 7 is a diagram illustrating each functional unit of the information processing apparatus 11 in the production heat quantity calculation apparatus 10. Each function part shown in FIG. 7 is implement | achieved by the said manufacture calorie | heat amount calculation program which CPU11a performs. The information processing apparatus 11 mainly includes an absolute humidity acquisition unit 111, a determination unit 112, an air volume acquisition unit 113, a production heat quantity calculation unit 114, and the like. The functions of these functional units will be described later. The calculation result of the production heat quantity in the air heat source heat pump 1 can be displayed on the display device 13 or output by printing. In executing the calculation flow shown in FIG. 6, the first thermometer 5, the second thermometer 6, the temperature / humidity meter 7, the fan ammeter 8, and the wattmeter 42 measured and collected during a predetermined measurement period. Measurement data, that is, the intake air temperature Ta, the blown air temperature Tb, the outdoor unit ambient air temperature Tc and the relative humidity RHc, the fan current value for driving the fan 22 in the outdoor unit 2, and the compressor 21 are supplied. Measurement data relating to driving power is transferred to the manufacturing calorific value calculation device 10 via a portable recording medium such as a flash memory card (FM), and stored in the memory 11b.

In calculating the amount of heat produced during heating operation of the air heat source heat pump 1, first, the absolute humidity acquisition unit 111 of the information processing device 11 performs the absolute humidity AHa [g / kg (DA)] of the intake air and the absolute humidity of the blown air. AHb [g / kg (DA)] is obtained (step S01). Here, the absolute humidity of each air can be obtained by the air diagram shown in FIG. 8 or a known arithmetic expression based on the dry bulb temperature [° C. (DB)] and the relative humidity [% RH]. The horizontal axis of the air diagram shown in FIG. 8 is the dry bulb temperature, and the vertical axis is the absolute humidity. In the present embodiment, a map as shown in an air diagram shown in FIG. 8 is stored in the memory 11b. This map stores correlations such as air dry bulb temperature, absolute temperature, relative humidity, and specific enthalpy as shown in FIG. The “air diagram” in the following description can also be read as a map stored in the memory 11b of the information processing apparatus 11. Here, as described above, the sensors installed in the vicinity position P1 of the inlet port 24 of the outdoor unit 2 and the vicinity position P2 of the outlet port 25 are thermometers. Therefore, in the present embodiment, the map (air diagram) shown in FIG. 8 shows the dry bulb temperature Tc [° C. (DB)] and the relative humidity RHc of the ambient air around the outdoor unit measured by the thermohygrometer 7 or a known one. The absolute humidity AHc of the outdoor unit ambient air is obtained based on these values, and the absolute humidity AHc of the outdoor unit ambient air is obtained as the absolute humidity AHa of the intake air. That is, the absolute humidity acquisition unit 111 of the information processing apparatus 11 acquires the absolute humidity AHa of the intake air as the same value as the absolute humidity AHc of the obtained outdoor unit ambient air.

On the other hand, the absolute humidity acquisition unit 111 of the information processing apparatus 11 calculates the absolute humidity AHb [g / kg (DA)] of the blown air as follows. That is, the absolute humidity acquisition unit 111 of the information processing apparatus 11 assumes that the relative humidity RHb of the blown air is a predetermined specified value, here 96 [% RH], and the relative humidity of the blown air obtained in this way. From the RHb and the dry air temperature Tb [° C. (DB)] of the blown air measured by the second thermometer 6, the absolute humidity AHb [g / kg (DA)] of the blown air is obtained. More specifically, the relative humidity RHb (assumed value: 96 [% RH]) of the blown air and the dry bulb temperature Tb are substituted into the map (air diagram) shown in FIG. The absolute humidity AHb [g / kg (DA)] of the blown air is calculated.

Next, the determination unit 112 of the information processing device 11 compares the magnitude relationship between the absolute humidity AHa of the intake air and the absolute humidity AHb of the blown air, and manufactures the air heat source heat pump 1 during the heating operation based on the magnitude relationship. A calculation parameter for calculating the amount of heat (the amount of heat absorbed by the outdoor unit 2) is determined (step S02). The amount of heat produced during the heating operation of the air heat source heat pump 1 is calculated by adding the energy consumption (driving power) of the outdoor unit 2 to the heat absorption amount of the outdoor unit 2.

  In FIG. 8, when the dry bulb temperature Tb of the blown air is Tb1, the corresponding absolute humidity AHb is shown as AHb1, and when the dry bulb temperature Tb of the blown air is Tb2, the corresponding absolute humidity AHb is shown as AHb2. Yes. In the example shown in FIG. 8, the value of absolute humidity AHb1 can be read as a value higher than AHa, and the value of AHb2 can be read as a value lower than AHa. Here, when the absolute humidity AHb of the blown air is equal to or higher than the absolute humidity AHa of the intake air as in AHb1 shown in FIG. 8, there is a change in latent heat when the intake air exchanges heat with the refrigerant in the heat exchanger 23. It can be judged that there is no. That is, it can be determined that the amount of heat absorbed in the outdoor unit 2 is only due to a change in the sensible heat of the air. Therefore, when the absolute humidity AHb of the blown air is equal to or higher than the absolute humidity AHa of the intake air, the determination unit 112 of the information processing apparatus 11 includes, among the two parameters, the temperature difference and the enthalpy difference between the intake air and the blown air. The temperature difference of each air is determined as a calculation parameter as a calculation parameter for calculating the amount of production heat at the time of heating operation of the air heat source heat pump 1.

On the other hand, when the absolute humidity AHb of the blown air is lower than the absolute humidity AHa of the intake air, for example, AHb2 shown in FIG. 8, the latent heat changes when the intake air exchanges heat with the refrigerant in the heat exchanger 23. Can be judged. That is, it can be determined that the heat absorption amount in the outdoor unit 2 is based on a change in total heat (sensible heat + latent heat), and it is necessary to calculate the production heat amount in consideration of the latent heat change. Therefore, in this case, the determination unit 112 of the information processing apparatus 11 calculates the amount of production heat during the heating operation of the air heat source heat pump 1 out of the two parameters of the temperature difference and the enthalpy difference between the intake air and the blown air. As a parameter, the enthalpy difference of each air is determined as a calculation parameter.

  Next, the air volume acquisition unit 113 of the information processing apparatus 11 obtains the air volume M of the fan 22 based on the measurement data relating to the fan current value measured by the fan ammeter 8 (step S03). The relationship between the air volume M and the fan current value can be obtained as follows. That is, for example, when the fan ammeter 8 is installed or removed, the current value of the fan 22 and the wind speed are simultaneously measured while intentionally changing the output of the fan 22 by changing the set temperature on the indoor 4a side. The relative relationship between the current value of the fan 22 and the wind speed is obtained. In this way, the air volume M of the fan 22 can be obtained through the wind speed using the current value of the fan 22 as an explanatory variable. In addition, you may measure the wind speed itself of the fan 22 using an anemometer etc., for example. However, the method by which the air volume acquisition unit 113 obtains the air volume M of the fan 22 is not limited to the above example, and various methods can be used.

  Next, the manufacturing heat quantity calculation unit 114 of the information processing apparatus 11 is based on the calculation parameters determined by the determination unit 112 in step S02 and the air volume M of the fan 22 obtained by the air volume acquisition unit 113 in step S03. The production heat quantity Q of 1 is calculated (step S04). In step S02, when the temperature difference between the intake air and the blown air is determined as a calculation parameter for calculating the production heat quantity Q, the production heat quantity Q is calculated based on the following equation (1).

Q = M × cp × (Ta−Tb) + E (1)
Where, Q: production heat quantity [kW], cp: constant pressure specific heat [kJ / kg / K], M: fan air volume (mass flow rate of air) [kg / s], Ta: dry bulb temperature of intake air [° C. (DB)], Tb: dry bulb temperature of blown air [° C. (DB)], E: energy consumption [kW]. The energy consumption E is the outdoor unit 2
And can be acquired based on the measurement data measured and collected by the wattmeter 42. The production heat quantity Q during the heating operation of the air heat source heat pump 1 is calculated by adding the energy consumption amount E of the outdoor unit 2 to the heat absorption amount of the outdoor unit 2, and in the equation (1), M × cp × (Ta The term −Tb) corresponds to the amount of heat absorbed by the outdoor unit 2. Further, the values acquired by the absolute humidity acquisition unit 111 in step S01 can be used as the dry bulb temperature Ta of the intake air and the dry bulb temperature Tb of the blown air.

  On the other hand, when the enthalpy difference between the intake air and the blown air is determined as a calculation parameter for calculating the production heat quantity Q in the above-described step S02, it is based on the following formulas (2) to (4) instead of the formula (1). The production heat quantity Q is calculated.

Ha = f (Ta, AHa) (2)
Hb = f (Tb, AHb) (3)
Q = M × (Ha−Hb) + E (4)
Where Ha: specific enthalpy of intake air [kJ / kg (DA)], Hb: specific enthalpy of blown air [kJ / kg (DA)], AHa: absolute humidity of intake air [g / kg (DA)] , AHb: absolute humidity [g / kg (DA)] of the blown air.

  The specific enthalpy Ha of the intake air can be obtained based on the dry-bulb temperature Ta and the absolute humidity AHa of the intake air based on a map (air diagram) shown in FIG. 8 and a known arithmetic expression. Similarly, the specific enthalpy Hb of the blown air can be obtained based on the map (air diagram) shown in FIG. 8 or a known arithmetic expression based on the dry bulb temperature Tb and the absolute humidity AHb of the blown air. Note that the values acquired by the absolute humidity acquisition unit 111 in step S01 can be used as the dry bulb temperatures Ta and Tb and the absolute humidity AHa and AHb of each air. By performing the processes of the above steps, the production heat quantity of the air heat source heat pump 1 can be calculated. Note that steps 01, 02, and 04 in the calculation flow shown in FIG. 6 correspond to an absolute humidity acquisition step, a determination step, and a manufacturing heat amount calculation step in the present invention, respectively.

  As described above, according to the calculation method of the production heat quantity according to the present embodiment, the detection result of the state of each air around the outdoor unit 2 by the first thermometer 5, the second thermometer 6 and the temperature and humidity meter 7. Based on the above, the absolute humidity of each of the intake air and the blow-out air is derived. And based on the magnitude relationship between the absolute humidity in the intake air and the blown air, the production heat quantity of the air heat source heat pump 1 (the heat absorption quantity of the outdoor unit 2) is based on either the temperature difference or the enthalpy difference between the intake air and the blown air. Decided whether to calculate. More specifically, when the absolute humidity of the blown air is equal to or higher than the absolute humidity of the intake air, it is considered that the intake air does not change latent heat when exchanging heat with the refrigerant, so the temperature difference between the intake air and the blown air. And the production heat quantity of the air source heat pump 1 is calculated based on the air flow rate. At that time, the temperature of each air is measured by the first thermometer 5 and the second thermometer 6 which are superior in responsiveness compared to the thermo-hygrometer 7, and therefore based on the detection result of such a thermometer. By calculating the production heat quantity of the air heat source heat pump 1, the production heat quantity can be calculated with high accuracy.

On the other hand, when the absolute humidity of the blown air is lower than the absolute humidity of the intake air, the intake air is considered to be accompanied by a latent heat change when exchanging heat with the refrigerant. The production heat quantity of the air heat source heat pump 1 is calculated based on the air flow rate. Thus, when the latent heat changes when the air sucked into the outdoor unit 2 exchanges heat with the refrigerant, by calculating the production heat quantity of the air heat source heat pump 1 based on the change in the enthalpy of the air, The calculation accuracy can be secured. In this case, the amount of production heat is calculated using the absolute humidity obtained from the temperature Tc and the relative humidity RHc of the outdoor unit ambient air detected by the thermohygrometer 7, but the thermohygrometer 7 It is installed around the machine 2 in a shaded and well-ventilated place. By installing the thermohygrometer 7 in such a place where the thermal environment is unlikely to change suddenly, it can be made less susceptible to the responsiveness when measuring the temperature and humidity of the air. It can suppress that the measurement precision of the temperature / humidity by 7 deteriorates.

  Further, according to the present embodiment, the air outlet 25 and the air inlet 24 of the outdoor unit 2, particularly the air outlet 25 where the humidity is very high and cool air is released during the heating operation, is condensed, frozen, or the like. Since the manufacturing heat quantity of the air heat source heat pump 1 can be calculated without installing a weak temperature / humidity meter, it is possible to suppress the failure of sensors during measurement. That is, according to the present embodiment, the amount of heat produced by the air heat source heat pump 1 can be calculated easily and accurately while suppressing failure of the sensors even during the heating operation.

  In addition, as shown in FIG. 4, in the present embodiment, the sensor unit 102 is attached to the first thermometer 5, the second thermometer 6, and the temperature / humidity meter 7 that are used for measuring the production heat quantity of the air heat source heat pump 1. A cover member 104 for covering is attached, and an opening window 104 a is formed in the cover member 104. By adopting such a structure, it is possible to guide air to the sensor unit 102 through the opening window 104a while suppressing direct sunlight and rain / snow from directly hitting the sensor unit 102 by the cover member 104. Thereby, the measurement accuracy can be improved while suppressing the failure of the sensor unit 102.

In Step 01 of the production heat quantity calculation flow shown in FIG. 6, 96 [% RH] is adopted as the specified value when assuming the relative humidity RHb of the blown air, but this value is changed. It doesn't matter. The value when assuming the relative humidity RHb of the blown air can be determined based on empirical rules based on the results of various tests and experiments. In the above embodiment, the first thermometer 5, the second thermometer 6, the temperature / humidity meter 7, the fan ammeter 8, and the power panel 41 installed around the outdoor unit 2 over a predetermined measurement period. The production heat quantity of the air heat source heat pump 1 is calculated after the fact based on the data collected using the wattmeter 42 installed in the above. However, each measurement device is permanently installed, and the production heat quantity of the air heat source heat pump 1 is calculated in real time. It may be calculated. However, according to the method for measuring and calculating the amount of production heat according to the present embodiment, it is not necessary to permanently install each sensor in the outdoor unit 2, which contributes to a reduction in the installation cost of each sensor, and each sensor. There is an advantage that deterioration risk and failure risk can be reduced.

  The program that causes the information processing apparatus 11 (computer) to execute each process related to the method for calculating the production heat quantity in the air heat source heat pump 1 described above may be encoded and stored in the storage area of the computer-readable medium. good. In this case, a program for realizing the function can be provided to a computer or a computer incorporated in a machine or apparatus via the computer-readable medium. A computer or a computer incorporated in a machine or apparatus can realize its functions by reading a program from a storage area of a computer-readable medium and executing the program.

  A computer-readable medium stores information such as programs and data by electrical, magnetic, optical, chemical, physical, or mechanical action and holds the information in a state that can be read by a computer. A recording medium. Examples of such recording media that can be removed from the computer include a flexible disk, a magneto-optical disk, a CD-ROM, a CD-R / W, a DVD, a DAT, an 8 mm tape, and a memory card. In addition, there are a hard disk, a ROM, and the like as a recording medium fixed to the computer.

  Various modifications may be made to the above-described embodiment without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 ... Air heat source heat pump 2 ... Outdoor unit 3 ... Indoor unit 4 ... Building 5 ... 1st thermometer 6 ... 2nd thermometer 7 ... Temperature / humidity meter 8・ ・ ・ Fan ammeter 9 ・ ・ ・ Circuit path 10 ・ ・ ・ Production calorie calculation device 11 ・ ・ ・ Information processing device 21 ・ ・ ・ Compressor 22 ... Fan 23 ... Heat exchanger 24 ... Suction port 25 ... outlet

Claims (5)

An air heat source heat pump comprising: an outdoor unit having a heat exchanger and a fan; and an indoor unit that supplies air conditioned by heat exchange with a refrigerant circulated between the outdoor unit and the indoor unit. A calculation method executed by a computer that calculates the amount of heat produced during heating operation,
Measured at the same time, the temperature of the intake air sucked into the outdoor unit from the inlet of the outdoor unit, and the heat exchange with the refrigerant in the heat exchanger, and then discharged to the outside from the outlet of the outdoor unit Measurement data relating to the temperature of the outdoor air and the temperature and relative humidity of the ambient air around the outdoor unit at a predetermined outdoor unit peripheral part away from the outlet and the suction port, Based on the acquired measurement data, an absolute humidity acquisition step for obtaining the absolute humidity of the intake air and the absolute humidity of the blown air;
When the absolute humidity of the blown air obtained in the absolute humidity acquisition step is equal to or higher than the absolute humidity of the suction air, the temperature difference between the blown air and the suction air is used as a calculation parameter for calculating the production heat quantity. A determination step of determining , when the absolute humidity of the blown air is lower than the absolute humidity of the intake air, a enthalpy difference between the blown air and the intake air as a calculation parameter for calculating the production heat quantity ; ,
A production heat quantity calculation step for calculating the production heat quantity based on the calculation parameter determined in the determination step and the air volume of the fan;
A method for calculating the amount of production heat.   An air heat source heat pump comprising: an outdoor unit having a heat exchanger and a fan; and an indoor unit that supplies air conditioned by heat exchange with a refrigerant circulated between the outdoor unit and the indoor unit. A calculation method executed by a computer that calculates the amount of heat produced during heating operation,
  Measured at the same time, the temperature of the intake air sucked into the outdoor unit from the inlet of the outdoor unit, and the heat exchange with the refrigerant in the heat exchanger, and then discharged to the outside from the outlet of the outdoor unit Measurement data relating to the temperature of the outdoor air and the temperature and relative humidity of the air surrounding the outdoor unit in the vicinity of the outdoor unit and away from the outlet and the suction port and in the shaded and well-ventilated outdoor unit And based on the acquired measurement data, an absolute humidity acquisition step for obtaining the absolute humidity of the intake air and the absolute humidity of the blown air;
  The absolute humidity of the intake air obtained in the absolute humidity acquisition step
A determination step of determining any one of a temperature difference and an enthalpy difference between the intake air and the blown air as a calculation parameter for calculating the production heat quantity based on a magnitude relationship with humidity;
  A production heat quantity calculation step for calculating the production heat quantity based on the calculation parameter determined in the determination step and the air volume of the fan;
  A method for calculating the amount of production heat. In the absolute humidity acquisition step, the absolute humidity obtained based on the measured temperature and relative humidity of the ambient air around the outdoor unit is acquired as the absolute humidity of the intake air, and the relative humidity of the blown air is determined in advance. Obtaining the absolute humidity of the blown air based on the relative humidity of the blown air obtained on the assumption that the prescribed value is obtained and the measured temperature of the blown air;
The method for calculating the amount of production heat according to claim 1 or 2. An air heat source heat pump comprising: an outdoor unit having a heat exchanger and a fan; and an indoor unit that supplies air conditioned by heat exchange with a refrigerant circulated between the outdoor unit and the indoor unit. A calculation device for calculating the amount of heat produced during heating operation,
Measured at the same time, the temperature of the intake air sucked into the outdoor unit from the inlet of the outdoor unit, and the heat exchange with the refrigerant in the heat exchanger, and then discharged to the outside from the outlet of the outdoor unit Measurement data relating to the temperature of the outdoor air and the temperature and relative humidity of the ambient air around the outdoor unit at a predetermined outdoor unit peripheral part away from the outlet and the suction port, An absolute humidity acquisition unit for obtaining the absolute humidity of the intake air and the absolute humidity of the blown air based on the acquired measurement data;
When the absolute humidity of the blown air obtained by the absolute humidity acquisition unit is equal to or higher than the absolute humidity of the suction air, the temperature difference between the blown air and the suction air is used as a calculation parameter for calculating the production heat quantity. A determination unit that determines , when the absolute humidity of the blown air is lower than the absolute humidity of the intake air, the enthalpy difference between the blown air and the intake air as a calculation parameter for calculating the production heat ;
A production heat quantity calculation unit that calculates the production heat quantity based on the calculation parameter determined by the determination unit and the air volume of the fan;
A calorific value calculation device comprising:   An air heat source heat pump comprising: an outdoor unit having a heat exchanger and a fan; and an indoor unit that supplies air conditioned by heat exchange with a refrigerant circulated between the outdoor unit and the indoor unit. A calculation device for calculating the amount of heat produced during heating operation,
  Measured at the same time, the temperature of the intake air sucked into the outdoor unit from the inlet of the outdoor unit, and the heat exchange with the refrigerant in the heat exchanger, and then discharged to the outside from the outlet of the outdoor unit Measurement data relating to the temperature of the outdoor air and the temperature and relative humidity of the air surrounding the outdoor unit in the vicinity of the outdoor unit and away from the outlet and the suction port and in the shaded and well-ventilated outdoor unit And obtaining an absolute humidity of the intake air and an absolute humidity of the blown air based on the acquired measurement data,
  Based on the magnitude relationship between the absolute humidity of the intake air and the absolute humidity of the blown air obtained by the absolute humidity acquisition unit, any one of the temperature difference and the enthalpy difference of the intake air and the blown air is calculated as the production heat quantity. A determination unit that determines a calculation parameter for calculating
  A production heat quantity calculation unit that calculates the production heat quantity based on the calculation parameter determined by the determination unit and the air volume of the fan;
  A calorific value calculation device comprising:

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