JPS6318126B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating calorimetry system. In recent years, as a form of residential building heating system, there is a system that supplies hot water from one hot water device to many households and obtains hot air from the heating device, or radiator, at each consumer home to perform the necessary room heating. It is recommended from the viewpoint of economic efficiency as a facility and the structure of the building.

Consumers perform the required heating by switching the amount of heat from the heating device as needed, but the amount of heat in this type of heating system is determined by the flow rate of hot water measured by a hot water meter connected to the hot water circuit. , is calculated by an arithmetic circuit based on the difference between the hot water output temperature and the hot water return temperature. However, this method of measuring calorific value has a limit on the flow meter, so as the hot water flow rate is reduced, the error increases, resulting in high accuracy. The disadvantage is that the measurable range is narrow and the flow rate range is limited. In particular, when a plurality of heat loads (radiators, water heaters, etc.) with significantly different amounts of heat consumption are connected to the same hot water circuit, the error in the amount of heat becomes large for a small heat load. Such an error in measuring the amount of heat results in unfair billing for consumers.

On the other hand, since the hot water circuit is a closed system, the circulating hot water becomes contaminated due to a large amount of heat load, which causes malfunction or failure of the hot water meter.

In the hot water circuit of conventional heating systems, elements such as resistance temperature detectors or thermistors are used to measure the outgoing and returning temperatures of hot water, but hot water piping systems are usually stored centrally on the floor or wall. Therefore, even if these elements were to be arranged for each consumer, the space required as a whole would be too large to be ignored.

The present invention was made in consideration of the drawbacks of the heating system of the above-mentioned form, and the resistance value is proportional or inversely proportional to the heat radiation amount in conjunction with the heat radiation amount adjustment operation of the radiator whose heat radiation amount is variable. It is characterized by providing a variable resistor to generate a voltage proportional to the amount of heat radiation, converting this voltage into a frequency, and displaying the integrated value. By extracting the amount of heat dissipation in the form of voltage in this way, there is no calorific value measurement error due to the size of the heat load or hot water flow rate, and it is possible to always measure heat loads with high accuracy over a wide range of heat loads, thereby improving fairness for consumers. At the same time, the number of problems caused by not using a hot water meter will be drastically reduced.

The present invention will be carried out below with reference to the accompanying drawings.

FIG. 1 shows an embodiment of the calorimetry system (constant current type) according to the present invention.

An example will be described in which heat is supplied to three radiators 1, 2, and 3 by hot water circulating through one hot water circuit (not shown). Heat radiator 1 uses a three-stage heat radiation amount switching method of strong, medium, and weak; radiator 2 uses a two-stage heat radiation amount switching method between strong and weak; and radiator 3 uses a heat radiation amount continuous switching method. A switching resistor is provided having an electrical resistance value proportional to .
That is, for radiator 1, "strong", "medium",
"Weak", the resistance value R ₁₁ is proportional to the amount of heat dissipation,
R ₁₂ , R ₁₃ and a switching resistor 4 having a resistance value of 0 for "off" are provided, and for the heat sink 2,
Resistance value proportional to heat radiation amount corresponding to "strong" or "weak"
A switching resistor 5 having R ₂₁ , R ₂₂ and a resistance value 0 for "off" is provided, and for the heat sink 3, a variable resistor 6 having a variable resistance value R ₃ proportional to each selected amount of heat radiation is provided. will be provided. The switching switch SW ₁ of the switching resistor 4 is interlocked with the heat radiation amount switching knob T ₁ of the radiator 1, and the switching switch SW 1 of the switching resistor 5 is
SW ₂ is configured to work in conjunction with the heat radiation amount switching knob T ₂ of the heat radiator 2, and the slider SW ₃ of the variable resistor 6 is configured to work in conjunction with the heat radiation amount adjustment knob T ₃ of the heat radiator 3.

Each switching resistor 4, 5, 6 is connected in series and connected to a constant current circuit 7. The voltage appearing across the constant current circuit 7 is supplied to a voltage-frequency conversion circuit 8, which generates a frequency proportional to the input voltage.
The integration indicator 9 is configured to operate based on this frequency. The constant current circuit 7, the voltage-frequency conversion circuit 8, and the integration display 9 constitute a heating meter (the part surrounded by a broken line).

Next, the operation of this calorimetric system will be explained.

When a direct current _I0 is passed from the constant current circuit 7 of the heating meter to the series circuit of resistors 4, 5, and 6 corresponding to each radiator, the resistance value of each resistor becomes a value proportional to the selected amount of heat radiation. Therefore, the voltage generated across each resistor has a value proportional to the amount of heat dissipation. In other words, if heatsink 1 is used at "medium", V ₁ = R ₁₂ I ₀ becomes a voltage proportional to the amount of heat dissipated at "medium", and if heatsink 2 is used at "high" Then, V ₂ = R ₂₁ I ₀ becomes a voltage proportional to the amount of heat radiation of "strong", and if the heat sink 3 is used with the adjustment knob T ₃ set to the position shown in the figure, then V ₃ = Let R ₃ I ₀ be the voltage proportional to the amount of heat radiation at that time. Therefore, the sum of the voltages of each of these heat sinks, V=V ₁ +V ₂ +V ₃ , is proportional to the total amount of heat radiation. This voltage V is converted into a frequency (number of pulses) by a voltage-to-frequency conversion circuit 8, and the output thereof drives an integration display 9 to display an integrated amount. This display is an integrated value of the amount of heat dissipated, and since it operates with a voltage proportional to the amount of heat dissipated, whether small or large, there is no room for measurement error, and accurate calorific value measurement over a wide range is possible.

FIG. 2 shows another embodiment using a constant voltage method,
The same reference numerals as in FIG. 1 indicate the same components.

The difference from FIG. 1 is that the resistance values R ₁₁ ′, R ₁₂ ′,
R ₁₃ ′; R ₂₁ ′, R ₂₂ ′; R ₃ ′ are the corresponding heat sinks 1, 2,
The electrical resistance value is inversely proportional to the amount of heat dissipated in 3, and a constant voltage circuit 10 is used in place of the constant current circuit 7, and each resistor 4, 5, 6 is connected in parallel to the constant voltage circuit 10. It is a point. However, constant voltage circuit 1
0 is the resistance installed in each resistor and heating meter
Add a constant voltage V ₀ to R 0 and R ₀ .

Next, to explain the operation, when a constant voltage V ₀ is applied from the constant voltage circuit 10 of the heating meter to each resistor and the resistor R ₀ , the resistor 4 receives a current I ₁ =V ₀ /R ₁₂ '+R ₀ ≒ V ₀ /R ₁₂ ′ flows, and the current I ₂ =V ₀ /R ₂₁ ′+R ₀ flows through resistor 5.
≒ V ₀ /R ₂₁ ′ flows, and the current I ₃ =V ₀ /R ₃ ′+R ₀ flows through resistor 6.
≒ V ₀ /R ₃ ′ flows. However, R ₀ is selected to be sufficiently smaller than each resistance value of each resistor. The total current I = I ₁ + I ₂ + I ₃ flowing through each resistor flows through the resistor R ₀ and the voltage V
= R ₀ I, and since this voltage V is proportional to the heat radiation amount of all heatsinks, this voltage V is applied to the voltage-frequency conversion circuit 8 to convert it into a frequency, and as in the embodiment shown in FIG. The cumulative value of the amount of heat is displayed on the cumulative display 9.

In the present invention, in connection with the heat radiation amount switching operation of each radiator, an electric resistance proportional or inversely proportional to the heat radiation amount is selected, a voltage proportional to each heat radiation amount is generated, and the total heat radiation amount is extracted in the form of a voltage. Furthermore, the amount of heat is integrated and displayed by converting it into a frequency. Since the amount of heat dissipated is taken out in the form of voltage in this way, there is no error or malfunction associated with the use of heat meters as in the past, and customers are therefore able to bear the fair burden of charges. The operation is easy, the structure is simplified, and the price can be reduced.

[Brief explanation of the drawing]

FIG. 1 of the accompanying drawings is a circuit diagram of one embodiment of the calorimetry system according to the present invention, and FIG. 2 is a circuit diagram of another embodiment of the same measurement system. 1, 2, 3... Heat sink, 4, 5... Switching resistor, 6... Variable resistor, 7... Constant current circuit, 8...
...Voltage-frequency conversion circuit, 9... Integration display, 1
0... Constant voltage circuit, R ₀ ; R ₁₁ , R ₁₂ , R ₁₃ ; R ₂₁ ,
_R22 ; _R3 ...Resistance.

Claims (1)

[Claims] 1. A resistor whose resistance value changes in proportion or inverse proportion to the heat radiation amount in conjunction with the heat radiation amount adjustment operation of a heat radiator with variable heat radiation amount, and a circuit that generates a frequency related to the voltage or current generated by the resistor. and a display device that displays the integrated frequency, and causes the resistor to generate a voltage or current proportional to the amount of heat radiated by the radiator, and supplies this voltage or current to the frequency generation circuit. Heat metering system for heating.