JPS61182563A - Measuring equipment of heat quantity - Google Patents

Abstract

PURPOSE:To compensate an error generated during the stop of a device to be measured to measure a heat quantity correctly by detecting the heat quantity from the temperature and flow rate of a heating medium flowing in and out to/from the device to be measured and compensating the heat quantity by a detecting signal of the transfer state of the heating medium. CONSTITUTION:The heating medium is sent to the device 1 to be measured at its heat quantity such as an air conditioner by a transfer machine 3, its inlet and outlet temperatures are detected by detectors 4, 5 and its flow rate is detected by a detector 6. The ON/OFF of the transfer machine 3 is detected by a detector 7. In a heat quan tity measuring equipment 10, a temperature difference DELTAt is outputted by a subtractor 11 and the heat quantity C is outputted on the basis of the temperature difference DELTAt and the flow rate Q by a multiplier 12. Then, the operating state of the transfer machine 3 is generated as a compensating signal R, the heat quantity C is compensated by the signal R in the multiplier 13 and operated 15. Since the heat quantity QXDELTAt is multiplied by '1' during the operation of the transfer machine 3 and multiplied by '0' during the stop of the transfer machine 3 to compensate the heating quantity, the error during the stop equipment to be measured is erased to calculate the corrected heat quantity, the heat quantity can be measured highly accurately.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a calorimetry device for measuring the amount of heat of a device that involves heat generation or heat absorption using a heat medium, and particularly relates to The present invention relates to a calorimetry device that can improve measurement accuracy even when the device is started and stopped.

(Technical background of the invention and its problems) As a conventional calorimetry device, there is a device that generates or absorbs heat using a heat medium sent by a transfer device (hereinafter referred to as “
The temperature of the heat medium at the entrance and exit of the device under test is detected by a temperature detector, and the temperature difference of the heat medium at the entrance and exit of the device under test is determined from this detected temperature. There is a method of measuring the amount of heat of the device to be measured by multiplying it by the flow rate of the heat medium.

However, in this type of calorimetry device, when the device to be measured starts and stops, even though the amount of heat is zero when the main body is stopped, the measurement error of the heat M measurement device etc. or a negative slight calorimetric value may occur. Particularly when the device to be measured is stopped for a long time, the calorific value integration has the drawback that a slight positive or negative calorific value due to the measurement error cannot be ignored, resulting in poor calorific value measurement accuracy.

(Object of the Invention) The present invention has been made in order to eliminate the drawbacks of the prior art as described above, and an object of the present invention is to provide a calorimeter measuring device that has a simple configuration and can accurately improve the accuracy of measuring calorific value. purpose.

(Summary of the Invention) In order to achieve the above object, the present invention detects the operation and stop state of a transfer machine for sending a heat medium by an operation detection means, and operates the transfer machine by a correction signal generation means based on this detection signal. A signal of "1" is output when the device is in operation, and a signal of 11011 is output when the device is stopped, and this output signal is multiplied by (temperature difference x flow rate) by the calculation means to calculate the amount of heat in the device to be measured.

(Embodiment of the Invention) Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3.

Figure 1 is a diagram showing the configuration of the calorimeter.
is the device to be measured such as an air conditioner, 2 is the piping, and 3 is the pump.
The transfer device 3 is a transfer device such as a blower, and the heat medium for heat exchange sent out by the transfer device 3 is supplied to the device to be measured 1 via piping 2 . The piping 2 connected to the inlet/outlet of the device to be measured l is provided with a temperature detector 4 such as a thermocouple for detecting the temperature of the heat medium at the inlet, and a temperature detector 5 such as a thermocouple for detecting the temperature of the heat medium at the outlet. , a flow rate detector 6 such as an electromagnetic flowmeter that detects the flow rate of the heat medium is provided. Furthermore, transfer machine 3
An operation detection means 7 consisting of a semiconductor element, a relay, etc. is connected to detect the operation and stop state and output an on/off signal. and temperature detectors 4, 5. Each detection signal from the flow rate detector 6 and the operation detection means 7 is given to the calorimeter main body lO.

The calorimeter main body 10 is configured to have the following functions. That is, the subtracting means 11 calculates a temperature difference signal Δt between the inlet temperature signal t1 detected by the temperature sensor 4 and the outlet temperature signal t2 detected by the temperature sensor 5, and provides it to the multiplier 12. The flow rate signal Q detected by the device 6 is inputted, and the flow rate signal Q is multiplied by the temperature difference signal Δt to obtain a heat quantity signal C, which is then supplied to the multiplier 13. Further, when the output signal of the operation detection means 7 is sent to the correction signal generation means 14, the correction signal generation means 14 outputs a correction value of +8119 when the transfer 4i13 is in operation, and a correction of 0 when the transfer 4i13 is stopped. The multiplication means 1 outputs the signal R.
Give to 3. The multiplication means 13 multiplies the input heat amount signal C and the correction signal R to obtain a corrected heat amount signal σ, and calculates the corrected heat amount signal σ.
Give to 5. On the other hand, when the ON output signal of the motion detection means 7 is given to the pulse generation means 1G, the pulse generation means 1B generates a constant time width (for example, 1
A pulse signal (seconds) is generated and applied to the integrating means 17. The integrating means 17 integrates the number of input pulses to integrate the operating time T of the transfer machine 3, in order to consider whether or not the device to be measured l was continuously operating during the measurement time To. It is given to the calculation means 15. In the operator stage 15, the instantaneous value 15+ of the corrected heat amount and the integrated value 152 of the corrected heat amount at the measurement time T0 are integrated and obtained from the corrected heat amount signal σ, and the integrated value 152/operating time T or the integrated value 152/
An average value 153 of the corrected heat amount is calculated from the measurement time To, and the calculation result is provided to an output device such as a CRT.

FIG. 2 shows an example of a circuit in which the device shown in FIG. 1 is constructed using a microcomputer. That is, the calorimeter main body 10 includes an input/output interface, a control section,
It is composed of a microcomputer equipped with a central processing unit (CPU) having an arithmetic section and a storage section, and a relay is used as the operation detection means 7, and this relay
It is connected in series to a switch 20 for turning on and off the power supplied to the power source. Furthermore, the final calculation result of the calorific value measuring device main body 10 (i.e., the instantaneous value of corrected calorific value 15+, u
Output device 21 that outputs calculated value 152 and average value 153)
For example, the magnetic disk 211. magnetic tape 21
2. A printer 213, a CRT 214, etc. are provided. The analog signal outputs of the temperature detectors 4 and 5 and the flow rate detector 6 are converted into digital signals by an input interface in the microcomputer, and then given to the CPU, and the switch 20 turns on the power to the transfer machine 3. During this time, the relay 7 is energized and its contacts are turned on, and this on signal is given to the CPU via the input interface. Then, based on these input signals, the CPU calculates the temperature difference Δt and the amount of heat ΔtXQ according to a pre-stored program.

The corrected heat amount C, and average value 15
3 are sequentially computed, and the computed results are given to the output device 21 via the output interface, and the output device 21
allows you to store and display calculation results.

FIG. 3 is an explanatory diagram of the operation of the calorimeter shown in FIG. 1. First, when power is applied to the calorimeter main body 10 and a start switch (not shown) is turned on (step 30
), the temperature at the entrance and exit of the heat medium is detected by the temperature detector 4.5, and the temperature detection signals 1+, 1;! is read into the subtraction means 11, and the temperature difference Δt (=t
+-t2) is calculated (step 31) 0 Next, the flow rate of the heat medium is detected by the flow rate detector 6, and the flow rate signal Q is read into the multiplication means 12 (step 32). The amount of heat C (=ΔtXQ) is calculated (step 33). Furthermore, when the output signal of the operation detection means 7 is returned to the correction signal generation means 14, the correction signal generation means 14 takes a step to determine whether the heat medium transfer device 3 is in operation (ON) or stopped (OFF). 34), outputs a correction signal R of 1llll when it is in operation (on) and 0' when it is stopped (off) and gives it to the multiplier 13.Then, the multiplier 13 calculates the corrected heat amount (=CXR). To find it, when the correction signal R is 1, CX4.Correction signal R
When is O, perform the cxo operation (step 35.3
8) Also, the output of the motion detection means 7 is also given to the pulse generation means 16, and this pulse generation means I
B determines whether the heat medium transfer device 3 is in operation (on) or stopped (off) (step 37), and whether it is in operation (
When it is on (on), a pulse signal at 1 second intervals is emitted and given to the integration means 17 (step 38), and when it is stopped (off), the generation of pulse No. 13 at 1 second intervals, for example, is stopped. (Step 39). Then, the number of input pulses is counted by the integrating means 17, and the operating time T of the transfer machine 3 during the 4111 fixed time T is integrated, and the calculating means 15
given to. The calculation means 15 calculates the instantaneous value 15 of the corrected heat amount based on the corrected heat amount signal C given from the multiplication means 13.
1. and the integrated value 152 of the corrected heat amount at the measurement time To
In addition to calculating and finding the integrated value 152/operating time T,
Alternatively, the average value 153 of the corrected heat amount is calculated from the integrated value 15 pieces/measurement time To (step 40), and the calculation result is given to the output device 21 (step 41). , the integrated value or the average value is recorded on the magnetic disk 211. The measurement operation is completed by recording on the magnetic tape 212 or the like or displaying on the printer 2h, CRT 21J, etc. (step 42).

Therefore, in this embodiment, the corrected heat amount σ is obtained by multiplying the heat amount C obtained by multiplying the temperature difference Δt and the flow rate Q by °゛1°゛ when the transfer machine 3 is in operation, and by O゛ when it is stopped. Therefore, in calorific value measurement over a long period of time, even if the device under test is stopped for a long time, the measured calorific value during the stopped period becomes zero and the measurement error is eliminated, which improves the measurement accuracy during the entire measurement time.
As a result, it is possible to improve the accuracy of calorific value analysis, and to easily and accurately measure calorific value, thereby saving labor in calorific value measurement.

Further, in the above embodiment, since the calorimeter main body 10 is configured using a microcomputer, it is possible to simplify the circuit configuration and downsize the device. Note that the calorimeter main body 10 may be configured with electronic circuits instead of using a microcomputer, and each of the means 11 to 17 shown in FIG. 1 may be configured with an electronic circuit.

(Effects of the Invention) As explained above, according to the calorimetry device of the present invention,
Since the configuration is configured to calculate the corrected thermal welfare by multiplying the amount of heat C obtained by multiplying the temperature difference Δt by the flow rate Q by "1°" when the transfer machine is in operation and by "0°" when the transfer machine is stopped, That is, errors in calorific value measurement while the device to be measured is stopped can be eliminated, and therefore, measurement accuracy over the entire measurement time can be significantly improved with a simple circuit configuration.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a calorimeter measuring device showing an embodiment of the present invention, FIG. 2 is a circuit configuration diagram in which the calorimeter main body of FIG. 1 is configured with a microcomputer, and FIG. It is a flowchart for explaining the operation of the figure. - 1...Device to be measured, 3...Transfer machine. 4.5...Temperature detector, 6...Meteor detector. 7...Operation detection means, 10...Calorimeter main body. 11.d'B means, 12.13...multiplying means. 14... Correction signal generating means, 15... Calculating means. 16... Pulse generating means, 17... Integrating means. 21...Output device.

Claims (1)

[Claims] 1. Temperature difference Δ of the heating medium at the entrance and exit of a device that involves heat generation or heat absorption using a heating medium sent by a transfer device
In a calorific value measurement device that measures the amount of heat C of the device by determining t and multiplying this temperature difference Δt by the flow rate Q of the heat medium,
an operation detection means for detecting the operation and stop state of the transfer machine; and a correction signal generation that outputs a signal of "1" when the transfer machine is in operation and "0" when the transfer machine is stopped based on the output signal of the operation detection means. A calorific value measuring device comprising: means for calculating the amount of heat of the device; and calculating means for multiplying the amount of heat C by the output signal of the correction signal generating means to calculate the amount of heat of the device. 2. The means for determining the temperature difference Δt and multiplying the temperature difference Δt by the flow rate Q of the heat medium, the correction signal generating means, and the calculation means are configured by a microcomputer. Calorimetry device as described.