JP2008309432A - Heat source machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat source machine having the small volume, installable in the vicinity of a radiator, easy in installation, and capable of realizing high energy-saving performance. <P>SOLUTION: This heat source machine has an internal heating medium pipe having a first radiator connecting plug on one end and having a second radiator connecting plug on the other end, a heat exchanger arranged between the first radiator connecting plug and the second radiator connecting plug of the internal heating medium pipe, a circulating pump, a heating medium injection port, a plate-like expansion tank, a heating heater arranged outside the heat exchanger, and a control device having a commercial power source connecting terminal and controlling the heating heater and the circulating pump. The heat source machine is characterized by arranging at least a part of the first radiator connecting plug and the second radiator connecting plug, the internal heating medium pipe, the heat exchanger, the circulating pump, the heating medium injection port, the plate-like expansion tank, the heating heater and the control device in a plane in a covering case. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat source machine that is preferably used in a floor heating system. More specifically, the present invention relates to a heat source device that is easy to install and can realize high energy saving.

  Conventionally, various heating technologies have been proposed and put into practical use for the purpose of improving the comfort of living spaces in structures such as cold seasons in cold regions and houses in cold regions. Most of them are floor heating systems that are placed on the floor of the living space. As an example of the floor heating system, a foamed synthetic resin plate or a wooden plate is used as a base, and a heat medium pipe is embedded in a groove carved on one surface thereof, and these surfaces are made of aluminum. The thing provided with the heat radiator of the structure coat | covered with flexible thin plates, such as foil, is mentioned. In this system, the floor surface is warmed by the heat medium flowing through the heat medium pipe disposed in the radiator of the floor heating system, and the room is heated by the radiant heat from the floor surface.

  Conventional floor heating systems include a hot water type floor heating system that uses water as a heat medium, and a heat source device is installed outdoors and a heat source device is installed indoors. The heat source machine includes a combustion type using gas and kerosene and an electric type, and the specifications of the heat source machine are sufficient so that the entire heating area can be sufficiently heated by one heat source machine and a plurality of radiators. Is decided.

As a conventional heat source machine, for example, in Patent Document 1, a side wall of a main body has a forward header and a return header for pipe connection with a plurality of indoor radiators, and a return tank from the return header via a return pipe. Connected to the return tank and a partition plate having a lattice, and a rectifying plate is provided in the inside of the cistern. A switching valve is provided between each outgoing pipe of the outgoing header, and a branch pipe led out from a hot water lower outlet for taking out low-temperature water is provided at the lower part of the cistern, and one of the branch pipes leads out the low-temperature water, Connected to the low temperature circulation pump, connected to the outgoing pipe through the switching valve, the other side of the branch pipe connected to the heat exchanger side becomes high temperature water, and connected to the switching valve through the high temperature circulation pump Shi And the heat source equipment hot water heating apparatus configured to be coupled to 往管 is disclosed.
Japanese Patent Laid-Open No. 4-86455

However, the conventional hot water type floor heating system has the following problems.
Conventional hot water floor heating systems in which a heat source device is installed outdoors generally include a heat source device having a combustion heating device using gas or kerosene. This hot water type floor heating system requires large-scale piping work including outdoor piping because the heat source unit is separated from the radiator. This piping work is troublesome, increases costs, and has a problem of leakage due to construction quality. Also, in terms of thermal efficiency, piping is routed outdoors, so there is a problem that heat dissipation loss from the piping tends to be large, and because heat source equipment is installed outdoors, there is a problem that exhaust heat loss also increases. . Therefore, the heating output of the heat source machine requires an output that is far greater than the amount of heat radiated by the radiator during operation (for example, about 1.3 to 2 times the amount of heat radiated by the radiator). It was done. Furthermore, since the piping between the heat source unit and the radiator is long, the pressure loss that the heat medium receives in the piping is large, so the circulation pump used to circulate the heat medium in the piping uses a pump with a high head Was. The circulation pump with a high head was large and consumed much power. Furthermore, since the amount of heat medium retained in the entire hot water floor heating system increases because the piping between the heat source unit and the radiator is long, a large amount of heat is required to heat the heat medium. There is also a problem that the piping length to the heating location is likely to be uneven, the flow rate of the heat medium necessary for each heating location cannot be secured, and the heating performance is not achieved. Furthermore, when determining the heating output of the heat source device and the head of the circulation pump, etc., the heating load at the heating location and the heat medium are received by piping for each site where the hot water floor heating system is installed. Complicated calculations such as calculation of pressure loss, calculation of heat dissipation loss in heat source equipment and piping, selection of installation location of heat source equipment, design work requiring specialized knowledge such as piping design had to be done . Moreover, since this heat source machine is large-sized, the installation location is limited.

  On the other hand, a conventional hot water floor heating system in which a heat source device is installed indoors generally includes a heat source device having an electric heating device for safety and miniaturization of the heat source device. This hot water type floor heating system has less heat radiation loss than a hot water type floor heating system in which a heat source device is installed outdoors, and does not require large-scale piping work. However, since the heat source machine is downsized, the floor heating area that can be handled by a single heat source machine is limited, and thus the design is limited. In addition, if there are multiple radiators, the problem is that the calculation and design that must be performed before the installation work becomes complicated at each site where the hot water floor heating system is installed, the installation work is troublesome, Due to the allocation of the radiator, the piping length to the heating location tends to be uneven, and the flow rate of the heat medium for each radiator is likely to change. Furthermore, even if the heat source machine is downsized compared to a hot water floor heating system in which a heat source machine is installed outdoors, the installation location of the heat source machine is also limited to some extent.

  Therefore, an object of the present invention is to provide a heat source device that has a small volume, can be installed in the vicinity of a radiator, is easy to install, and can realize high energy saving.

  The present invention will be described below. In order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are appended in parentheses, but the present invention is not limited to the illustrated embodiment.

  The present invention includes an internal heat medium pipe (7) having a first radiator connection plug (13a) at one end and a second radiator connection plug (13b) at the other end, and the internal heat medium pipe. A heat exchanger (5a), a circulation pump (4), a heat medium inlet (19, 19), and a flat expansion tank provided between the first radiator connection plug and the second radiator connection plug (18), a heat source provided with a heater (5b) provided in contact with the heat exchanger, and a control device (16) having a commercial power connection terminal (14) and controlling the heater and the circulation pump At least part of the first radiator connection plug and the second radiator connection plug, the internal heat medium pipe, the heat exchanger, the circulation pump, the heat medium inlet, and the flat expansion tank A heater, a control device, and an outer case (1 ) Characterized in that it is arranged in a plane in a heat source unit (1).

  Here, the “first radiator connection plug” and the “second radiator connection plug” are plugs that connect the internal heat medium pipe provided in the heat source device and the heat medium pipe provided in the heat radiator. The “first radiator connection plug” is a supply port for supplying the heat medium heated through the heat exchanger included in the heat source unit from the heat source unit to the radiator. The “second radiator connection plug” is a return port through which the heat medium radiated in the heat medium pipe provided in the radiator returns from the radiator to the heat source device. A “heat exchanger” is a device that transfers heat from a heater to a heat medium. The “circulation pump” is a pump for circulating a heat medium in the floor heating system. The “heat medium inlet” is a spout for injecting a heat medium into the floor heating system when the floor heating system is installed. The “expansion tank” is a container having a space that can absorb the increase when the volume of the heat medium increases due to a temperature change. The “heater heater” is an apparatus provided for heating the heat medium, and is not particularly limited as long as it can heat the heat medium. The “control device” is a device that controls the heater and the circulation pump in accordance with the amount and temperature of the heat medium so that the indoor temperature becomes a set temperature. The “exterior case” is a case that covers each member constituting the heat source device. When the heat source device is installed substantially parallel to the floor surface when the floor heating system is installed, the upper surface of the heat source device and the upper surface of the radiator Are arranged on substantially the same plane, the thickness of the outer case is approximately the same as that of the radiator (about 12 mm). However, the circulation pump housing portion may be configured to protrude downward from the floor. “Arranged in a plane” means that the members constituting the heat source apparatus are arranged side by side on substantially the same plane. That is, it means that the components are arranged so as not to overlap when viewed in plan.

  In the said invention, it is preferable that a control apparatus (16) has a heat medium sensor (11).

  Here, the “heat medium sensor” is a sensor that senses the amount of the heat medium in the internal heat medium pipe and the temperature of the heat medium, and can sense the amount of the heat medium and the temperature of the heat medium. If there is no particular limitation. Among the heat medium sensors used in the present invention, as a sensor for detecting the amount of the heat medium, for example, one that detects the amount of the heat medium using a float or the amount of the heat medium is detected by measuring electric resistance. The thing etc. can be mentioned. Moreover, a thermistor etc. can be mentioned as a sensor which detects the temperature of a heat medium.

  In the said invention, it is preferable that a control apparatus (16) has an overheat prevention sensor (12).

  Here, the “overheat prevention sensor” is a sensor for preventing abnormal overheating of the heat medium. Examples of the overheat prevention sensor used in the present invention include a commercially available thermostat.

  According to the present invention, it is possible to reduce the thickness of the heat source device by downsizing each member constituting the heat source device and arranging the members on a flat surface. By setting it as this structure, it can install on a floor surface flush with a heat radiator, or can be affixed on a wall surface in the shape of a panel. Therefore, according to this invention, the heat source machine which can be arrange | positioned easily, without taking a place in living space, and can implement | achieve high energy saving property can be provided.

  Further, the control device provided in the heat source device includes the heat medium sensor, so that the heat medium can be prevented from being aired.

  Moreover, the control apparatus with which a heat source machine is equipped has an overheat prevention sensor, Therefore The abnormal overheating of a heat medium can be prevented.

  Such an operation and gain of the present invention will be made clear from the best mode for carrying out the invention described below.

  Hereinafter, the present invention will be described based on the embodiments shown in the drawings. However, what is described below is an example of the embodiments of the present invention, and the present invention is not limited to the following descriptions as long as the gist thereof is not exceeded. It is not a thing.

  Fig.1 (a) is a figure which shows schematically the example of a form of the heat-source equipment concerning this invention. FIG. 1B is a diagram schematically showing a cross section taken along line yy ′ shown in FIG. FIG. 2 is a diagram schematically showing an installation mode example of a heat source device and a radiator according to the present invention. FIG. 2A is a top view of the heat source device and the heat radiator according to the present invention, and shows the main constituent members so that they can be seen through for easy understanding. FIG. 2B is a diagram schematically showing a cross section taken along line xx ′ shown in FIG. In FIG. 2B, the vertical direction of the paper is the vertical direction at the time of installation. 2, components having the same configuration as in FIG. 1 are denoted by the same reference numerals as those used in FIG. 1, and description thereof is omitted as appropriate. FIG. 3 is a diagram schematically showing a control circuit example of a control device provided in the heat source apparatus according to the present invention. 3, components having the same configurations as those in FIGS. 1 and 2 are denoted by the same reference numerals as those used in FIGS. 1 and 2, and description thereof will be omitted as appropriate. FIG. 4 is a diagram schematically showing an example of how the heat source apparatus according to the present invention is used. 4, components having the same configuration as in FIG. 2 are denoted by the same reference numerals as those used in FIG. 2, and description thereof is omitted as appropriate. FIG. 5 is a diagram schematically showing another usage example of the heat source apparatus according to the present invention. 5, components having the same configuration as in FIGS. 2 and 4 are denoted by the same reference numerals as those used in FIGS. 2 and 4, and description thereof will be omitted as appropriate. FIG. 6 is a diagram schematically illustrating a configuration example of a conventional hot water floor heating system. 6A shows a hot water type floor heating system in which the heat source machine is installed outdoors, and FIG. 6B shows a hot water type floor heating system in which the heat source machine is installed indoors. In FIGS. 1-6, in order to prevent a figure from becoming complicated, the code | symbol is abbreviate | omitted suitably and shown.

  As shown in FIG. 1A, a heat source device 1 according to the present invention (hereinafter simply referred to as “heat source device 1”) has a first radiator connection plug 13a (hereinafter referred to as “supply port 13a”) at one end. And an internal heat medium pipe 7 having a second radiator connecting plug 13b (hereinafter referred to as “return port 13b”) at the other end. Further, between the supply port 13a and the return port 13b of the internal heat medium pipe 7, a heat exchanger 5a, a circulation pump 4, heat medium injection ports 19 and 19, and an expansion tank 18 are provided. A copper pipe is used for the heat exchanger 5a, and a heater 5b is disposed on the outer peripheral surface side thereof. Further, the heat source device 1 includes a control device 16, which has a commercial power connection terminal 14, and includes a heater 5 b and a circulation pump 4, a heat medium sensor 11, an overheat prevention sensor 12, and Control is performed by the control board 15. The internal heat medium pipe 7, the heat exchanger 5 a, the circulation pump 4, the heat medium inlets 19 and 19, the expansion tank 18, the heater 5 b, and the control device 16 are accommodated by being arranged in a plane in the outer case 17. Then, on one surface of the outer case 17, the heat medium enters and exits from the supply port 13a and the return port 13b.

  As shown in FIG. 2, the heat source device 1 is connected to the radiator 2 and used as the floor heating system 10. The radiator 2 is disposed in the vicinity of the heat source unit 1 and includes a heat medium pipe 3 through which a heat medium flows. The floor heating system 10 is placed on the base plywood 8 laid on the joists 9, and the floor heating system 10 is covered with the floor finishing material 6. At this time, since each member constituting the heat source device 1 is downsized, the thickness of the outer case 17 is approximately the same as that of the radiator (about 12 mm), and the floor heating system 10 is installed. Sometimes, the upper surface of the heat source device 1 and the upper surface of the radiator 2 are arranged on substantially the same plane. However, when the circulation pump 4 is thicker than the radiator 2, as shown in FIG.2 (b), it becomes the structure by which the circulation pump 4 accommodation part protruded under the floor.

  During operation of the floor heating system 10, the heat medium is supplied from the supply port 13 a to the radiator 2 (heat medium pipe 3) by the force of the circulation pump 4. The heat medium dissipates heat while flowing through the heat medium pipe 3 to warm the floor finish 6. Further, the heat transferred from the heat medium pipe 3 to the floor finishing material 6 is transmitted to the upper surface (floor surface) of the floor finishing material 6, and the room is heated by radiant heat from the heat. As described above, the heat medium is radiated by the radiator 2, so that the temperature of the heat medium is lowered when returning to the heat source unit 1 compared to when the heat medium is sent from the heat source unit 1. The heat medium radiated by the radiator 2 and the temperature is lowered returns to the heat source unit 1 (internal heat medium pipe 7) from the return port 13b, and heat exchange with the heat exchanger 5a heated by the heater 5b is performed in a predetermined manner. The temperature is raised. Then, the heated heat medium is again sent out from the supply port 13 a to the radiator 2 by the force of the circulation pump 4.

  The control of the circulation pump 4 and the heater 5b during operation of the floor heating system 10 is performed by the control device 16. The control device 16 includes a control board 15, a heat medium sensor 11, and an overheat prevention sensor 12. The control board 15 includes an operation panel 32 (see FIGS. 4 and 5), the heat medium sensor 11, And the control circuit for receiving the signal from the overheat prevention sensor 12 and controlling the circulation pump 4 and the heater 5b safely is incorporated.

  The specification of each member which comprises the heat source machine 1 is described in detail below.

  As the circulation pump 4, a pump having a head of 1.0 to 1.1 times the pressure loss experienced by the heat medium in the heat medium pipe 3 during operation of the floor heating system 10 is used. The circulation pump 4 can be directly driven by a commercial power supply of AC 100V or AC 200V. Furthermore, in order to suppress the thickness of the heat source unit 1 as much as possible, a specification with an outer dimension as small as possible is preferable, and a particularly thin one is more preferable.

  For the heat exchanger 5a, a copper tube having a high thermal conductivity is used from the viewpoint of reducing the thickness of the heat source unit 1 and increasing the heat exchange rate. The inner diameter of the heat exchanger 5a is preferably about 5 mm to 6 mm, and the outer diameter is preferably about 7 mm to 8 mm. The heat exchanger 5a is accommodated in the outer case 17 in a bent state, and the bending radius is preferably 5 times or more the outer diameter. The total length of the heat exchanger 5a is determined from the design value of the heat exchange capacity. For example, when the surface temperature of the heat exchanger 5a is 90 ° C. and the flow rate of the heat medium flowing through the floor heating system 10 is 1 L / min, the temperature of the heat medium returning from the radiator 2 to the heat source unit 1 is 46. The tube length at which the temperature of the heat medium supplied from the heat source device 1 to the radiator 2 becomes 60 ° C. can be calculated from the heat transfer amount and the required heat exchange amount. At both ends of the heat exchanger 5a, the inlet side of the heat medium is connected to the expansion tank 18 side, and the outlet side of the heat medium is connected to the circulation pump 4 side. At this time, if necessary, a member such as a bamboo shoot joint is used.

  As shown in FIG. 1B, a heater (carbon planar heater) 5b is disposed on the outer peripheral surface side of the heat exchanger 5a via an insulating coating material 5d. As an example of a specific structure of the heater 5b, as shown in FIG. 1 (b), an insulating coating material 5d is coated on the surface of the heat exchanger 5a to prevent a short circuit, and the outer peripheral surface side thereof. The carbon paste is applied to the heated portion with a uniform thickness. The insulating coating material 5d may be a chemically stable material such as metal oxide or glass. The heating location is within the tube length obtained by the above calculation performed to determine the total length of the heat exchanger 5a. The specification of the carbon paste is determined with a heating capacity of about 1000 W to 1500 W as a guide. Furthermore, power supply terminals 5c and 5c for applying an alternating current are provided at both ends of the carbon paste to be the heater 5b. The power supply terminals 5c and 5c are connected to the output terminal of the control board 15, and are heated.

  As the internal heat medium pipe 7, a copper pipe, a resin pipe, or a rubber pipe is used. In the present invention, since the heat source unit 1 is installed at the heating location, the heating efficiency is better when the heat of the heat medium flowing through the heat source unit 1 (internal heat medium pipe 7) is also transmitted to the floor surface. As the internal heat medium pipe 7, it is preferable to use a copper pipe or the like from the viewpoint of thermal conductivity, and heating efficiency can be improved. Further, by using the heat exchanger 5a and the internal heat medium pipe 7 as copper pipes, both members can be manufactured as one member.

The expansion tank 18 is a container having a space capable of absorbing the increase when the volume of the heat medium increases due to a temperature change, and has an electric corrosion resistance and a resistance to withstand the environment during operation of the floor heating system 10. It has durability. Further, in order to reduce the thickness of the heat source device 1, it is preferable to use a copper plate having a thickness of about 1 mm from the viewpoint of suppressing the thickness as much as possible. At this time, the external dimensions of the expansion tank 18 are about 8 mm to 10 mm in thickness, and the vertical and horizontal dimensions are the amount of heat medium retained in the entire floor heating system 10, the expansion rate of the heat medium, the initial filling pressure, and the maximum in the system. Calculated from the required tank capacity calculated from the pressure.
An air chamber is provided in the expansion tank 18, and the air chamber has a structure in which an air bag made of a chemically stable elastic rubber system excellent in chemical resistance and heat resistance is packed in the expansion tank 18. It has become. This makes it possible to achieve long-term stability, simplification, and cost reduction of the structure.
The place filled with the air chamber and the heat medium is separated by a partition made of a copper plate, and the partition is provided with a plurality of holes or slits so that the expanded heat medium can freely enter and exit.
Further, connection ports 20a and 20b are provided at both ends of the expansion tank 18, the connection port 20a is connected to the heat exchanger 5a side, and the connection port 20b is connected to the radiator 2 (heat medium pipe 3). ) Side. In FIG. 1 (a), the connection ports 20a and 20b and the heat medium injection ports 19 and 19 are illustrated as a single unit, but these may be integrated or separated. .

  The heat medium inlets 19 are openings for injecting the heat medium into the heat medium pipe 3 and the like when the floor heating system 10 is installed. As described above, the heat medium inlets 19 and 19 may be installed as plugs integrated with the expansion tank connection ports 20a and 20b, or may be installed in a separate structure. It is preferable that a valve structure capable of preventing the back flow of the heat medium after completion of the heat medium injection is added to the heat medium inlets 19 and 19.

  The heat medium sensor 11 is a sensor that detects the amount of the heat medium in the internal heat medium pipe 7 and the temperature of the heat medium. As the sensor for detecting the amount of the heat medium among the heat medium sensors 11, a sensor for detecting the presence or absence of the heat medium in the internal heat medium pipe 7 using a float is used. Moreover, a thermistor etc. can be mentioned as a sensor which detects the temperature of a thermal medium. By adopting such a configuration, the design and circuit can be simplified.

  The overheat prevention sensor 12 is a sensor that detects and controls the temperature of the heat medium in the internal heat medium pipe 7. As the overheat prevention sensor 12, for example, a commercially available thermostat having an opening operation temperature of 90 ° C. and a closing temperature of 80 ° C. or less can be used.

As shown in FIG. 3, the control board 15 includes the circulation pump 4 and the heating by a heat medium sensor circuit 27 that opens and closes by a signal from the heat medium sensor 11 and an overheat prevention sensor circuit 28 that opens and closes by a signal from the overheat prevention sensor 12. A control circuit for safely controlling the heater 5b is incorporated. Further, the control board 15 is provided with a commercial power supply connection terminal 14 (hereinafter simply referred to as “terminal 14”) for connection with a commercial power supply of AC100V or AC200V, and the circulation pump is immediately input by inputting a voltage. 4 and the heater 5b can be controlled.
When AC100V or AC200V is connected to the terminal 14 of the control board 15, the signal divided by the resistor 21 and the resistor 22 is sent to the gate of the triac 25 via the heat medium sensor circuit 27 and the overheat prevention sensor circuit 28. Further, it is input to the gate of the triac 26 through the heat medium sensor circuit 27, the triacs 25 and 26 are turned on, and the circulation pump 4 and the heater 5b start operating. When there is no heat medium in the internal heat medium pipe 7, the heat medium sensor circuit 27 is opened and the gate signals to the triacs 25 and 26 are cut off, so that the circulation pump 4 and the heater 5b are stopped. If the overheat prevention sensor 12 is activated for some reason when the heat medium is full in the internal heat medium pipe 7 and the circulation pump 4 and the heater 5b are operating, the overheat prevention sensor circuit 28 is opened. Then, the heater 5b is stopped. At this time, the circulation pump 4 does not stop.

  As the triac 25, a triac having a withstand voltage of 400 V or more and a control current of 10 A or more is preferable. The triac 26 is preferably a triac having a withstand voltage of 400 V or more and a control current of 0.5 A or more.

  In a conventional hot water type floor heating system (hereinafter referred to as “conventional floor heating system”), as shown in FIG. 6A, the installation location of the heat source device 51 is outdoor, and the radiators 2a and 2b. There is a floor heating system 50 in which the installation locations are indoors, and a floor heating system 60 in which the installation locations of the heat source device 61 and the radiators 2c and 2d are both indoors, as shown in FIG. 6B. In the floor heating system 50, one heat source unit 51 installed outdoors and a plurality of radiators 2a, 2b installed indoors supply a heat medium from the heat source unit 51 to the radiators 2a, 2b. It is connected by a hot water return pipe 52 and a hot water return pipe 53 for returning the heat medium from the radiators 2a and 2b to the heat source unit 51. In the floor heating system 60, a single heat source unit 61 installed indoors and a plurality of radiators 2c and 2d supply hot water piping 62 for supplying a heat medium from the heat source unit 61 to the radiators 2c and 2d. And a hot water return pipe 63 that returns the heat medium from the radiators 2 c and 2 d to the heat source unit 61. In the floor heating system 50 and the floor heating system 60, two radiators are exemplified. However, as the heating area increases, the number of radiators increases accordingly.

  When installing the floor heating system 50, first, the installation location of the heat source device 51 is selected, and the design of the hot water return pipe 52 and the hot water return pipe 53 (hereinafter also referred to as “pipe 52, 53”). Etc. need to be done. Moreover, in the floor heating system 50, since the heat source unit 51 is installed outdoors and the radiators 2a and 2b are installed indoors, the pipes 52 and 53 are long and winding. For this reason, the design and piping work of the pipes 52 and 53 are large and complicated, which takes time and costs. If there is a problem in the design or the like, and there is a problem that the heat medium does not flow or heating is not possible, it is necessary to redesign, and this work is also large. Furthermore, there exists a problem that there exists a risk of a water leak on construction quality because it becomes the structure where the piping 52 and 53 becomes long and winding. Further, the allocation of the radiators 2a and 2b tends to make the piping length from the heat source unit 51 to the radiators 2a and 2b non-uniform, and the flow rate of the heat medium between the radiator 2a and the radiator 2b tends to change. is there.

  Moreover, in the floor heating system 50, since the heat-source equipment 51 is installed outdoors, a waste heat loss is large. Furthermore, since the pipes 52 and 53 are routed outdoors, the heat dissipation loss from the pipes 52 and 53 tends to increase. Furthermore, since the pipes 52 and 53 become longer, the amount of heat medium (system water amount) held in the floor heating system 50 as a whole increases, and the amount of heat medium that must be heated to heat the room increases. Requires heat. For these reasons, the output of the heating device provided in the heat source device 51 is much larger than the amount of heat radiated by the radiators 2a and 2b during operation (for example, the heat radiated by the radiators 2a and 2b). About 1.3 to 2 times the amount of heat generated).

  In addition, since the pipes 52 and 53 between the heat source device 51 and the radiators 2a and 2b have a long and winding structure, the pressure loss that the heat medium receives in the pipes 52 and 53 increases, and the circulation provided in the heat source device 51 is provided. The pump must have a high head. A pump having a high head is large and consumes a large amount of power.

  When determining the specifications of the heat source device 51, it is necessary to determine the specifications of the heating device, the specifications of the circulation pump, and the like. It is determined by performing complex calculations such as calculation of pressure loss, calculation of heat dissipation loss in heat source equipment and piping, and calculation of the amount of retained heat medium in the entire system.

  In the floor heating system 60, since the heat source unit 61 is installed indoors and the radiators 2c and 2d are also installed indoors, compared to the floor heating system 50, complicated piping design and large-scale piping work are not required. Less heat loss. However, similarly to the floor heating system 50, the floor heating system 60 also heats the heat medium necessary for heating the entire heating area by the single heat source unit 61, to the plurality of radiators 2c and 2d. It is premised on circulation. Therefore, if the area of the heating location is large (the number of radiators is large), there arises a problem that calculation and design that must be performed before installation becomes complicated, and that piping becomes complicated. In addition, there is a problem that the pipe length from the heat source device 61 to the radiators 2c and 2d is likely to be uneven due to the allocation of the radiators 2c and 2d, and the flow rate of the heat medium between the radiator 2c and the radiator 2d is easily changed. . Furthermore, since the heat source device 61 is installed indoors, it is necessary to reduce the size of the heat source device 61, and there is a limit to the heating area that can be handled by one heat source device 61.

  On the other hand, as described above, the heat source unit 1 may be installed in the vicinity of the radiator 2, so that the pipe (hereinafter referred to as “connection pipe”) between the heat source unit 1 and the radiator 2 may be used. ) Is extremely shorter than the pipes 52 and 53 and the pipes 62 and 63 of the floor heating system 50 and the floor heating system 60. Therefore, it is not necessary to calculate the heat dissipation loss in the connection pipe and the pressure loss that the heat medium receives in the connection pipe. That is, when installing the heat source machine 1, the complicated calculation and design according to the heating location as mentioned above are not required.

  Further, since the connecting pipes of the floor heating system 10 are extremely short compared to the pipes 52 and 53 and the pipes 62 and 63 provided in the floor heating system 50 and the floor heating system 60, the floor heating system 50 and the floor heating system are also provided. Compared to 60, the amount of heat required to heat the heat medium may be small because the heat dissipation loss in the piping is small and the amount of heat medium retained in the entire floor heating system 10 is small. Specifically, the heating output of the heat source unit 1 may be 1.3 times or less with respect to the heat radiation amount in the radiator 2 during operation. However, in order to sufficiently raise the temperature of the radiator, it is preferable that the heating output of the heat source unit 1 is 1.0 times or more of the heat radiation amount in the radiator 2 during operation. Thus, since the heat source machine 1 has lower performance requirements for the heating device than the heat source machine 51 and the heat source machine 61, the heating device 5 can be downsized.

  In addition, since the connecting pipes of the floor heating system 10 are extremely short compared to the pipes 52 and 53 and the pipes 62 and 63 provided in the floor heating system 50 and the floor heating system 60, the floor heating system 10 has a heat medium. Since the pressure loss received by the connection pipe is reduced, the required performance for the circulation pump 4 is also lower than that of the circulation pump provided in the heat source device 51 and the heat source device 61. Specifically, in the heat source device 1, the head of the circulation pump 4 may be 1.1 times or less than the pressure loss experienced by the heat medium in the heat medium pipe 3 during operation. However, in order to sufficiently circulate the heat medium, it is preferable that the head of the circulation pump 4 is 1.0 times or more the pressure loss experienced by the heat medium in the heat medium pipe 3 during operation. Thus, in the heat source machine 1, since the required performance with respect to a circulation pump is low compared with the heat source machine 51 and the heat source machine 61, the circulation pump 4 can be reduced in size.

  Furthermore, since the amount of heat medium held by the entire floor heating system 10 is smaller than that of the floor heating system 50 and the floor heating system 60, the expansion tank 18 provided with the heat source unit 1 can also be reduced in size.

  As described above, in the heat source machine 1, the required specifications for the members provided in the heat source machine 1 are lower than those of the heat source machine 51 and the heat source machine 61, so the heat source machine 1 is smaller than the heat source machine 51, 61. Can be By setting it as this form, it is also possible to store the heat-source equipment 1 in the place etc. which install a dummy at the time of floor heating system 10 installation, and it is easy to install the several heat-source equipment 1 in one heating location. Therefore, when installing the floor heating system 10 in a place where the heating load is large (the heating area is large), instead of increasing the number of radiators and adjusting the specifications of the heat source machine to the heating point as in the past, Accordingly, it is only necessary to determine the number of floor heating systems 10 to be installed. Therefore, the floor heating system 10 including the heat source device 1 has fewer restrictions on the installation place and the like than the floor heating system 50 and the floor heating system 60, and can easily cope with any heating place.

  As explained so far, the floor heating system 10 including the heat source device 1 is easy to install and can realize high energy saving performance. In addition, since installation is easy, when installing a radiator in a room of about 10 tatami mats, installation work that required 3 to 5 days can be completed in about 4 to 5 hours. Therefore, it is easy to install on existing properties. Furthermore, since the heat source unit 1 is operated using electric energy, in addition to a commercial power source, a hot water type using various energy forms such as wind power, wave power, solar light, fuel cell, gas micro turbine, and thermal power generation. A floor heating system can be constructed. In addition, as shown in FIG. 2 (a), the heat source unit 1 is reduced in size as compared with the heat source unit 51 and the heat source unit 61, so that in the floor heating system 10, the upper surface of the heat source unit 1 and the radiator 2. It is possible to arrange them on the substantially same plane, and it is possible to obtain a benefit such that the room in which the floor heating system 10 is installed can be used widely, and the appearance is excellent.

  In the heat source machine of the present invention, the internal heat medium pipe is not particularly limited as long as it can withstand the environment during operation of the heat source machine. Specific examples of the internal heat medium pipe include a resin pipe such as a polyethylene pipe and a metal pipe such as a copper pipe and an aluminum pipe. However, in the present invention, since the heat source unit is installed at the heating location, the heating efficiency is better when the heat of the heat medium flowing in the heat source unit (internal heat medium pipe) is also transmitted to the floor surface. Therefore, from the viewpoint of improving the heat conduction efficiency, it is preferable to use a copper tube having good heat conductivity.

  In the heat source apparatus of the present invention, the heat exchanger is not particularly limited as long as it can transmit an appropriate amount of heat to the heat medium. However, from the viewpoint of reducing the thickness of the heat source device and increasing the heat exchange rate, it is preferable to use a copper tube having a high thermal conductivity with an inner diameter of 5 mm to 6 mm and an outer diameter of about 7 mm to 8 mm.

  In the heat source apparatus of the present invention, the heater is not particularly limited as long as it can transmit an appropriate amount of heat to the heat exchanger. Specific examples of the heater include a nichrome wire heater and a carbon sheet heater. However, in order to reduce the thickness of the heat source device, a carbon planar heater is preferable from the viewpoint of suppressing the thickness as much as possible and further improving the heating efficiency.

  In the heat source unit of the present invention, the circulation pump has a head that is 1.1 times or less the pressure loss experienced by the heat medium in the heat medium pipe during operation of the floor heating system, Any form is acceptable as long as it can withstand the environment. However, in order to sufficiently circulate the heat medium, it is preferable that the head of the circulation pump is 1.0 times or more the pressure loss experienced by the heat medium in the heat medium pipe during operation of the floor heating system. In addition, a light weight that can be directly driven by a commercial power supply of AC100V or AC200V is preferable. Further, from the viewpoint of minimizing the thickness of the heat source device, a specification with a small external dimension is preferable, and a thin one is particularly preferable. .

  In the heat source apparatus of the present invention, the expansion tank is a container having a space capable of absorbing the increase when the volume of the heat medium increases due to a temperature change, and can withstand the environment during operation of the floor heating system. As long as it has electric corrosion resistance and durability, the form is not particularly limited. However, in order to reduce the size of the heat source device, it is preferable to use, for example, a copper plate having a thickness of about 1 mm from the viewpoint of suppressing the thickness as much as possible. At this time, the external dimensions of the expansion tank are about 8 mm to 10 mm in thickness, and the vertical and horizontal dimensions are based on the amount of heat medium retained in the entire floor heating system, the expansion rate of the heat medium, the initial filling pressure, and the maximum pressure in the system. Obtain from the calculated required tank capacity.

  In the floor heating system of the present invention, the heat medium sensor is not particularly limited as long as it can detect the amount of the heat medium in the internal heat medium pipe and the temperature of the heat medium. As a heat medium sensor that can be used in the present invention, for example, a sensor that detects the presence or absence of a heat medium in the internal heat medium pipe by measuring the electric resistance of the heat medium, or a sensor in the internal heat medium pipe that uses a float Examples include a sensor that detects the presence or absence of a heat medium. However, from the viewpoint of simplifying the design, a sensor using a float sensor with a simple circuit is preferable. Moreover, a thermistor etc. can be mentioned as a sensor which detects the temperature of a thermal medium.

  Below, the usage pattern of the heat-source equipment 1 is demonstrated using FIG.4 and FIG.5.

  FIG. 4 schematically shows an example in which a floor heating system 10 including one heat source device 1 and one radiator 2 is used. As shown in FIG. 4, the floor heating system 10 is used by being connected to a commercial power supply 34 via a switch 31 and a leakage breaker 33. The switch 31 is connected to the operation panel 32 via the communication line 35 and can be opened / closed (ON / OFF) intermittently by operating the operation panel 32.

  FIG. 5 schematically shows another embodiment in which the floor heating systems 10, 10,... Are used in a plurality of heating locations. As shown in FIG. 5, when floor heating systems 10,... Are used in a heating area having a large area, the number of floor heating systems 10 corresponding to the area is installed. The floor heating systems 10, 10,... Are electrically connected in parallel at each heating location (the heating location (1) and the heating location (2)), and the floor heating systems 10, 10,. It is used by being connected to a commercial power source 34 via an earth leakage breaker 33.

  The commercial power supply 34 that can be used in the present invention may be either AC100V or AC200V. The switch 31 that can be used in the present invention may be either a mechanical contact system or a semiconductor system. The operation panel 32 that can be used in the present invention is not particularly limited as long as it has room temperature setting and room temperature detection functions and can control the switch 31 according to the room temperature. The control capacities of the earth leakage breaker 33, the switch 31, and the operation panel 32 are determined by the total number of floor heating systems 10 connected after the switch 31.

  In the description so far, the form in which the heat source device 1 and the radiator 2 are arranged on the same plane (floor surface) has been described, but the present invention is not limited to such a form. In this invention, the form which installs a heat radiator on a floor surface and fixes a heat-source machine to a wall surface, for example is also considered. Moreover, although the description so far demonstrated the form with which the one heat radiator 2 is provided with respect to one heat source machine 1, this invention is not limited to this form. Within the range that can be handled by the capability of the heat source unit 1, the number of radiators can be two or more.

  FIG. 7 is a flowchart showing a simplified installation method of the floor heating system including the heat source device according to the present invention.

  As shown in FIG. 7, the installation method of the floor heating system 10 includes a radiator laying step (step S71), a pipe connection step (step S72), a water injection step (step S73), a power input step (step S74), and air venting. A process (process S75) and a temperature rising confirmation process (process S76) are provided. Hereinafter, the installation method of the floor heating system 10 will be specifically described with reference to FIGS. 1, 2, and 7.

<Heat radiator laying step S71>
Step S <b> 71 is a step of installing the radiator 2 and the heat source device 1 on the base plywood 8. At this time, when the circulation pump 4 is thicker than the radiator 2, the base plywood 8 and the joists 9 on which the circulation pump 4 housing portion of the heat source device 1 is placed need to be drilled in advance.

<Piping connection process S72>
Step S <b> 72 is a step of connecting the heat source device 1 and the radiator 2. Specifically, piping like the conventional floor heating system is not necessary, and it is only necessary to connect the internal heat medium pipe 7 and the heat medium pipe 3 through the supply port 13a and the return port 13b.

<Water injection process S73>
Step S73 is a step of injecting a heat medium from the heat medium injection port 19 provided in the heat source device 1. Two heat medium inlets 19 are provided. By opening both the heat medium inlets 19 and 19 and injecting the heat medium from one side, air or the like in the pipe can be pushed out from the other side. After heat medium injection, check for heat medium leakage.

<Power input step S74>
Step S74 is a step of inputting commercial power to the heat source device 1. The commercial power supply may be either AC100V or AC200V.

<Air bleeding process S75>
Step S75 is a step of removing residual air in the piping of the floor heating system 10. The heat medium is completely applied to the heat medium pipe 3, the internal heat medium pipe 7, the circulation pump 4, etc., and air is vented. Check that there is no leakage of the heat medium again after air bleeding is complete.

<Temperature confirmation step S76>
Step S76 is a step of confirming whether the floor heating system 10 can be normally operated. Operate the heat source machine and check the rise of the temperature of the heat medium. At this time, check whether the heat medium leaks and the switches operate normally.

  When installing in an existing house or the like, it is difficult for the customer to live in the place where the floor heating system is planned to be installed from the start to the completion of the installation of the floor heating system. In the conventional floor heating system, when installing a radiator in a room of about 10 tatami mats as the installation period, it took 3 to 5 days, so when installing the floor heating system in an existing property, it is long. There were times when it interfered with the customer's daily life. However, the floor heating system provided with the heat source apparatus according to the present invention is easy to install, and the steps S71 to S76 can be completed in 4 hours to 5 hours. Therefore, according to the floor heating system provided with the heat source apparatus of the present invention, installation to an existing property is also very effective.

  Although the present invention has been described with reference to the most practical and preferred embodiments at the present time, the present invention is not limited to the embodiments disclosed herein. The invention can be changed as appropriate without departing from the spirit or idea of the invention that can be read from the claims and the entire specification, and a heat source apparatus with such a change is also included in the technical scope of the present invention. Must be understood as.

(A) is a figure which shows roughly the example of the form of the heat-source equipment concerning this invention. (B) is a figure which shows roughly the cross section in yy 'shown to (a). It is a figure showing roughly an example of composition of a floor heating system provided with a heat source machine concerning the present invention. (A) is a top view of a floor heating system, (b) is a figure which shows roughly the cross section in xx 'shown to (a). It is a figure which shows roughly the example of a control circuit of the control apparatus with which the heat-source equipment concerning this invention is equipped. It is a figure which shows roughly the usage type example of the heat-source equipment concerning this invention. It is a figure which shows roughly the example of another usage pattern of the heat-source equipment concerning this invention. It is a figure which shows roughly the structural example of the conventional warm water type floor heating system. (A) shows the hot water type floor heating system in which the heat source machine is installed outdoors, and (b) shows the hot water type floor heating system in which the heat source machine is installed indoors. It is a flowchart which simplifies and shows the installation method of the floor heating system provided with the heat-source equipment concerning this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat source machine 2, 2a, 2b, 2c, 2d Radiator 3 Heat medium pipe 4 Circulation pump 5 Heating device 5a Heat exchanger 5b Heater 5c Power supply terminal 5d Insulation coating material 6 Floor finish material 7 Internal heat medium piping 8 Ground plywood 9 joist 10 floor heating system 11 heat medium sensor 12 overheat prevention sensor 13a first radiator connection plug (supply port)
13b Second radiator connection plug (return port)
14 Commercial power supply connection terminal 15 Control board 16 Control device 17 Exterior case 18 Expansion tank 19 Heating medium inlets 20a, 20b Connection ports 21, 22, 23 Resistors 24 Capacitors 25, 26 Triac 27 Heating medium sensor circuit 28 Overheat prevention sensor circuit 31 Switch 32 Operation panel 33 Earth leakage breaker 34 Commercial power supply 35 Communication line 50 Conventional floor heating system 51 Heat source machine 52 Hot water return pipe 53 Hot water return pipe 60 Conventional floor heating system 61 Heat source machine 62 Hot water return pipe 63 Hot water return pipe

Claims (3)

An internal heat medium pipe having a first radiator connection plug at one end and a second radiator connection plug at the other end;
A heat exchanger provided between the first radiator connection plug and the second radiator connection plug of the internal heat medium pipe, a circulation pump, a heat medium inlet, and a flat expansion tank;
A heater provided in contact with the heat exchanger;
A control device that has a commercial power connection terminal and controls the heater and the circulation pump;
A heat source machine comprising:
At least a part of the first radiator connection plug and the second radiator connection plug, the internal heat medium pipe, the heat exchanger, the circulation pump, the heat medium inlet, and the flat plate shape. An expansion tank, the heater, and the control device are arranged in a plane in an outer case, and the heat source machine. The heat source apparatus according to claim 1, wherein the control device includes a heat medium sensor. The heat source device according to claim 1, wherein the control device includes an overheat prevention sensor.

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