JPH0632911U - Heating system - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a heating device that supplies a substantially constant heat medium such as hot water to each heating radiator regardless of changes in heating load. A boiler 2 installed in a casing 1 and a circulation circuit 4 in which a heat medium heated by the boiler 2 is circulated to a plurality of radiators 7 via open / close valves 6 respectively. In the provided heating device, pressure sensors 9 are provided on both the suction side and the discharge side of the circulation pump 3, and the rotation control of the circulation pump 3 is controlled so that the pressure difference between the pressure sensors 9 becomes constant. This is a configuration including the device 10.
Therefore, it is possible to always supply a substantially constant heat medium to each radiator 7 regardless of the fluctuation of the heating load.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heating device for heating with a heat medium such as hot water obtained by a heat medium heating combustion device.

[0002]

[Prior art]

 Conventionally, a heating device for heating with a heat medium such as hot water obtained in a boiler including a heat medium heating combustion device and a heat exchange device is configured as shown in FIG. 3, for example. In the figure, 1 is a casing, 2 is a boiler arranged in the casing 1, 3 is a circulation pump, and 4 is a circulation circuit.

Reference numerals 5 and 5 are headers installed outside the housing, and a plurality of radiators 7 and 7 such as floor heating panels are arranged in parallel between the headers 5 and 5 via a plurality of open / close valves 6 and 6. Piping is connected. Reference numeral 8 is a closed expansion tank provided at the return portion of the circulation circuit 4, whereby the circulation circuit 4 is kept in a closed state.

A heat medium such as hot water heated in the boiler 2 is circulated in the radiators 7 and 7 in the circulation circuit 4, where the indoor air is heated and then returned to the boiler 2 to be heated again. In addition, the on-off valves 6 and 6 are opened and closed according to the temperature of the room in which the heat sinks 7 and 7 are installed, and the heating amount of the boiler 2 is adjusted accordingly, so that an appropriate heating capacity is obtained. There is.

[0005]

[Problems to be solved by the device]

 However, in the heating device described above, the total flow rate of the circulating heat medium is constant even if the heating capacity of the boiler 2 changes as the opening / closing valves 6 and 6 are opened / closed. There was a problem that the flow velocity in the radiator changed greatly and noise was generated near the upper limit of heating capacity. In addition, near the lower limit of the heating capacity, the flow velocity through the radiator was too high, and there were problems such as the erosion of the pipe wall and the formation of holes, and the heating capacity was unstable.

The present invention has been made in view of the above facts, and provides a heating device capable of always supplying a substantially constant heat medium to each radiator regardless of the fluctuation of the heating load. Has an aim.

[0007]

[Means for Solving the Problems]

 The present invention is a heating device for heating with a heat medium such as hot water obtained from a boiler.In this system, pressure sensors are provided on both the suction side and the discharge side of the circulation pump of the circulation circuit. This is a configuration including a control device that controls the rotation of the circulation pump so that the pressure becomes constant.

[0008]

[Action]

 As a result, when the heating load increases, the rotation speed of the heat medium circulation pump increases, increasing the total flow rate of the circulation circuit, and when the heating load decreases, the rotation speed decreases and the total flow rate of the circulation circuit decreases. By limiting the flow rate to each radiator, the flow rate to each radiator is kept almost constant and the heat radiation is stabilized.

Further, since the flow velocity of each radiator is substantially constant, erosion and perforation of the pipe wall are prevented.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, 1 is a casing, 2 is a boiler arranged in the casing 1, 3 is a circulation pump, and 4 is a circulation circuit. Reference numerals 5 and 5 are headers arranged outside the housing. Between the headers 5 and 5, a plurality of radiators 7 and 7 such as floor heating panels are connected in parallel via a plurality of open / close valves 6 and 6. Has been. Reference numeral 8 is a closed expansion tank provided at the return portion of the circulation circuit 4, whereby the circulation circuit 4 is kept in a closed state.

Reference numerals 9 and 9 are pressure sensors provided on both the suction side and the discharge side of the circulation pump 3 of the circulation circuit 4 in the housing for detecting static pressure. , Is connected to a control device 10 that controls the rotation of the circulation pump. The control device 10 controls the rotation speed of the circulation pump 3 to change the discharge amount of the heat medium by detecting the differential pressure by the pressure sensors 9 and 9, as shown in FIG.

That is, when the on-off valves 6 and 6 are opened and the heating load increases, the differential pressure detected by the pressure sensors 9 and 9 becomes smaller than a predetermined value, so that the control device 10 controls the rotation speed of the circulation pump 3. It is increased to increase the discharge amount of the circulation pump 3. On the contrary, when the on-off valves 6 and 6 are closed and the heating load becomes small, the differential pressure detected by the pressure sensors 9 and 9 becomes larger than a predetermined value, so that the control device 10 reduces the rotation speed of the circulation pump 3. The discharge amount of the circulation pump 3 is reduced. Therefore, it is possible to always supply a substantially constant heat medium to each radiator 7 regardless of the fluctuation of the heating device.

[0013]

[Effect of device]

 According to the heating device of the present invention, by providing the control circuit for controlling the rotation of the circulation pump so that the differential pressure between the discharge side and the suction side of the circulation pump becomes constant, the heating load of the heating heat sink is increased. When the heating medium circulation pump increases, the number of rotations of the heat medium circulation pump increases to increase the discharge amount, and when the heating load decreases, the number of rotations decreases and the discharge amount is limited, thereby reducing the flow rate to each radiator. Ideal heating can be achieved by making the heat radiation stable and almost constant.

Further, since the flow velocity flowing through the radiator is also substantially constant, there is an effect that erosion and perforation of the pipe wall can be prevented.

Further, as in the above-described embodiment, by using the closed circulation circuit having the closed expansion tank, the evaporation of the heat medium is reduced and the invasion of dust can be prevented.

[Brief description of drawings]

FIG. 1 is a system diagram of a heating device showing an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of a control device that controls the rotation of a circulation pump.

FIG. 3 is a system diagram of a heating device showing a conventional example.

[Explanation of symbols]

 2 Boiler (combustion device for heating heat medium) 3 Circulation pump 4 Circulation circuit 6 Open / close valve 7 Radiator 9 Pressure sensor 10 Control device

Claims (1)

[Scope of utility model registration request] 1. A combustion device for heating a heat medium installed in a housing, and a heat medium heated by the combustion device for heating a heat medium are distributed to a plurality of radiators via an on-off valve in a heat medium circulation pump. In a heating device having a circulating circulation circuit, pressure sensors are provided on both the suction side and the discharge side of the circulation pump of the circulation circuit, and the circulation pump is arranged so that the pressure difference between these pressure sensors becomes constant. A heating device comprising a control device for controlling rotation of the heating device.