JP2014103782A - Heat source machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat source machine capable of ensuring an electric supply when a power failure occurs without need for a backup power supply.SOLUTION: The heat source machine 10, having a connection terminal 45 connected with a commercial power supply 11 and operating motor-driven apparatuses 15, 23, 27, 29, 32, 33, 34, 35, 36, 37, 38, 39, 40, 42 by power supply through the connection terminal 45, includes a connection terminal 47 connected with an external power supply 46 separate from the commercial power supply 11 and, when the commercial power supply 11 has a power failure, ensures a power supply path from the external power supply 46 to the motor-driven apparatuses 15, 23, 27, 29, 32, 33, 34, 35, 36, 37, 38, 39, 40, 42 through the connection terminal 47.

Description

The present invention relates to a heat source machine that operates an electric device by electric power supplied from a commercial power source.

The heat source machine is supplied with electric power from a commercial power source and operates an electric device such as a pump or a temperature sensor to supply hot water.
And there exists a heat source machine provided with the backup power supply (battery) so that an electric equipment can be operated at the time of a power failure, and the specific example is described in patent documents 1 and 2. The backup power source is charged with power from a commercial power source, and supplies power to the electric device during a power failure.

Japanese Utility Model Publication No. 6-14855 JP-A-8-226145

However, if a backup power source is added to the heat source unit, the manufacturing cost of the entire heat source unit increases, which is not economical.
This invention is made | formed in view of this situation, and it aims at providing the heat source machine which ensures the power supply at the time of a power failure, without providing backup power supply.

A heat source apparatus according to the present invention that meets the above object has a connection terminal A connected to a commercial power source, and is a heat source machine that operates an electric device by supplying power via the connection terminal A. A connection terminal B connected to the external power source is provided, and a power supply path from the external power source to the electric device is secured via the connection terminal B when the commercial power source is out of power.

In the heat source apparatus according to the present invention, the power source determination means for detecting a power supply state of the commercial power supply, and a switching means for connecting any one of the connection terminals A and B to the electric device, the switching means includes the It is preferable to switch the connection source to the electric equipment from the connection terminal A to the connection terminal B by detecting a power failure of the commercial power supply by the power supply determination unit.

In the heat source apparatus according to the present invention, it is preferable that the heat source apparatus further includes voltage switching means for adjusting the power from the external power source to a predetermined voltage.

In the heat source apparatus according to the present invention, it is preferable to limit the electric devices that operate when electric power is supplied from the external power source.

In the heat source apparatus according to the present invention, it is preferable that the connection terminal B is connected to the external power source when the commercial power source is in a power failure state.

In the heat source apparatus according to the present invention, it is preferable that the connection terminal B is always connected to the external power source.

The heat source device according to the present invention includes a connection terminal B connected to an external power source different from the commercial power source, and ensures a power supply path from the external power source to the electric device via the connection terminal B when the commercial power source is out of power. . Therefore, the commercial power supply can secure a power supply during a power failure without providing a backup power supply in the heat source device. In particular, in recent years, facilities capable of supplying electric power to electric devices such as solar power generation and large-capacity storage battery systems have become widespread in ordinary households. For example, these facilities should be adopted as external power sources. Can do.

The heat source apparatus according to the present invention includes a power supply determination unit that detects a power supply state of a commercial power source, and a switching unit that connects one of the connection terminals A and B to the electric device, and the power supply determination unit performs a power failure of the commercial power source. By detecting, when the switching means switches the connection source to the electric device from the connection terminal A to the connection terminal B, the power supply source can be reliably set to the external power source by the start of the power failure of the commercial power source.

When the heat source apparatus according to the present invention further includes voltage switching means for adjusting the power from the external power source to a predetermined voltage, an external power source having a voltage different from the voltage of the commercial power source can be employed as the power supply source.

In the heat source device according to the present invention, when the electric device to be operated is limited when electric power is supplied from the external power source, the device can be easily restored after the commercial power source is restored by protecting the minimum device during a power failure. It is possible to Furthermore, power consumption when using an external power source can be suppressed, and the operating time can be lengthened.

In the heat source device according to the present invention, when the connection of the connection terminal B to the external power source is performed when the commercial power source is in a power failure state, the power of the external power source can be supplied to the heat source device at a desired timing during the power failure. Accordingly, it is possible to preferentially supply power output from the external power source to devices other than the heat source device.

In the heat source machine according to the present invention, when the connection terminal B is always connected to an external power source, the power of the external power source can be supplied to the heat source machine immediately after the occurrence of a power failure.

It is a block diagram which shows the electrical connection of the heat-source equipment which concerns on one embodiment of this invention. It is explanatory drawing of the heat source machine.

Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIG. 1, a water heater (an example of a heat source machine) 10 according to an embodiment of the present invention has a connection terminal 45 (connection terminal A) connected to a commercial power supply 11. Electric power is supplied by supplying electric power from the commercial power supply 11 to supply hot water. Details will be described below.

As shown in FIG. 2, the water heater 10 includes a hot water storage tank 12 for storing hot water, and a heat pump 14 connected to the hot water storage tank 12 via a boiling circuit 13. The boiling circuit 13 that connects the lower and upper parts of the hot water storage tank 12 via the heat pump 14 is provided with a circulation pump 15 that acquires water from the lower part of the hot water storage tank 12 and sends it to the heat pump 14.
The heat pump 14 includes a heat exchanger 17, an expansion valve 18, a heat exchanger 19, and a compressor 20 connected by a heat medium circulation circuit 16 to constitute a heat pump cycle. The heat exchanger 17 is connected to the boiling circuit 13 to exchange heat between water flowing through the boiling circuit 13 and the heat medium circulating in the heat medium circulation circuit 16, and the heat exchanger 19 is exchanged between the outside air and the heat medium circulation circuit 16. The heat medium that circulates is exchanged.
The heat medium circulating in the heat medium circuit 16 condenses when passing through the heat exchanger 17 and heats the water flowing through the boiling circuit 13, then expands through the expansion valve 18, and then heat exchange After evaporating in the vessel 19 and absorbing heat from the outside air, the pressure is raised by the compressor 20 and then sent to the heat exchanger 17.

The water discharged from the lower part of the hot water storage tank 12 passes through the heat exchanger 17 and is heated, and then flows into the hot water storage tank 12 from the upper part of the hot water storage tank 12. The hot water storage tank 12 has a water supply pipe 21 connected to the lower portion thereof, and water is supplied into the hot water storage tank 12 from the water supply pipe 21. Accordingly, the hot water storage tank 12 stores hot water in the upper part and stores water in the lower part, and the hot water in the hot water storage tank 12 is connected to the hot water supply pipe 22 connected to the upper part of the hot water storage tank 12. Supplied.

A temperature sensor 23 for measuring the temperature of the hot water in the upper part of the hot water storage tank 12 is attached to the hot water storage tank 12, and the temperature of the hot water sent from the hot water storage tank 12 to the hot water supply pipe 22 is measured by this temperature sensor 23.
A propeller fan 24 that promotes heat exchange of the heat exchanger 19 is provided in the vicinity of the heat exchanger 19, and the boiling circuit 13 includes temperature sensors 25 on the upstream side and the downstream side of the heat exchanger 17, respectively. And a temperature sensor 26 is provided. In addition, a heater 27 for preventing freezing, a pressure reducing valve 28 for adjusting water pressure, and a temperature sensor 29 for measuring the water temperature in the water supply pipe 21 are attached to the water supply pipe 21.

The hot water supply pipe 22 is branched into two, one forms a flow path for sending hot water in the upper part of the hot water storage tank 12 to a kitchen, a washroom, etc., and the other hot water in the upper part of the hot water storage tank 12 to the bathtub 31 via the bathtub circuit 30. Is formed.
One side of the hot water supply pipe 22 branched is provided with a mixing valve 32 to which the water supply pipe 21 is connected. The mixing valve 32 mixes the water in the water supply pipe 21 with the hot water from the hot water storage tank 12, thereby Adjust the temperature. A temperature sensor 33 for measuring the temperature of the hot water whose temperature has been adjusted by the mixing valve 32 is provided on the downstream side of the mixing valve 32 of the hot water supply pipe 22.

On the other side where the hot water supply pipe 22 is branched, a mixing valve 34 to which the water supply pipe 21 is connected and a temperature sensor 35 for measuring the temperature of the hot water that has passed through the mixing valve 34 are provided. The hot water discharged from the hot water storage tank 12 is sent to the bathtub 31 through the bathtub circuit 30 after the water in the water supply pipe 21 is added by the mixing valve 34 and the temperature is adjusted.
As shown in FIG. 1, the mixing valves 32 and 34 are connected to a control circuit 37 to which an operation panel 36 is connected together with the temperature sensors 23, 29, 33 and 35, the circulation pump 15 and the heater 27. The operation panel 36 is provided with operation buttons, and the user can input the temperature of hot water supplied to the kitchen, the washroom, etc. (hereinafter also referred to as “hot water supply temperature”) and the hot water of the bathtub 31 by an input operation from the operation panel 36. The tension temperature (hereinafter, also simply referred to as “hot water temperature”) can be set.

The control circuit 37 determines the mixing ratio of hot water and water in the mixing valve 32 based on the measured temperatures of the temperature sensors 23 and 29 so that hot water at the set hot water supply temperature is sent out from the mixing valve 32.
Then, the control circuit 37 determines the mixing ratio of hot water and water in the mixing valve 34 based on the measured temperatures of the temperature sensors 23 and 29 so that hot water at the set hot water temperature is sent out from the mixing valve 34. To.
In addition, a freezing prevention heater 38 is attached to the hot water supply pipe 22 on the downstream side of the mixing valve 32 and the temperature sensor 33.

As shown in FIG. 2, the bathtub circuit 30 includes a circulation pump 39 that takes out hot water from the bathtub 31, a temperature sensor 40 that measures the temperature of hot water taken out from the bathtub 31, and hot water from the bathtub 31 and the hot water storage tank 12. A heat exchanger 41 for exchanging heat of the hot water is attached. The hot water in the bathtub 31 flows into the bathtub circuit 30 by the operation of the circulation pump 39 and returns to the bathtub 31 through the heat exchanger 41.
The heat exchanger 41 and the hot water storage tank 12 are connected via a reheating circuit 43 to which a circulation pump 42 is attached, and the hot water in the upper part of the hot water storage tank 12 is sent to the reheating circuit 43 by the operation of the circulation pump 42. It returns to the hot water storage tank 12 via the heat exchanger 41.

When the operation panel 36 is operated to start the chasing operation, the control circuit 37 transmits a command signal to the circulation pumps 39 and 42 to start the operation, and circulates the hot water in the bathtub 31 in the bathtub circuit 30. The hot water in the hot water storage tank 12 is circulated in the reheating circuit 43. The hot water in the bathtub 31 that circulates in the bathtub circuit 30 returns to the bathtub 31 after being heated by the hot water in the hot water storage tank 12 that circulates in the reheating circuit 43 when passing through the heat exchanger 41. Temperature rises.

In the present embodiment, the hot water storage tank 12, the circulation pumps 15, 39, 42, the temperature sensors 23, 29, 33, 35, 40, the heaters 27, 38, the pressure reducing valve 28 and the heat exchanger 41 are accommodated in the housing 44. Has been. Both the heaters 27 and 38 are disposed in the housing 44 at positions that are easily affected by the outside air temperature near the outside of the housing 44.
The control circuit 37 operates the heaters 27 and 38 and operates the circulation pumps 15, 39 and 42 to prevent freezing when the outside air temperature measured by a temperature sensor (not shown) is equal to or lower than a predetermined temperature. Here, the heaters 27 and 38 and the circulation pumps 15, 39 and 42 may be operated at predetermined time intervals or may be continuously operated. Further, a heater may be provided in addition to the heaters 27 and 38 to prevent freezing of other portions.
The heater 38, the circulation pumps 39 and 42, and the temperature sensor 40 are connected to a control circuit 37 as shown in FIG.

In the present embodiment, the circulation pumps 15, 39, 42, the expansion valve 18, the compressor 20, the temperature sensors 23, 25, 26, 29, 33, 35, 40, the propeller fan 24, the heaters 27, 38, and the mixing valve 32. , 34 and the operation panel 36 are electric devices that are operated by supplying power from the commercial power supply 11.
The commercial power supply 11 is 200 VAC, and the water heater 10 includes a connection terminal 45 connected to the commercial power supply 11 and a connection terminal 47 (connection terminal B) connected to an external power supply 46 different from the commercial power supply 11. I have. In the present embodiment, the connection terminal 45 is connected to the commercial power supply 11 via the distribution board, and the connection terminal 47 is connected to the external power supply 46 via the distribution board. However, the present invention is not limited to this. Absent.

While the commercial power source 11 is energized, the connection terminal 45 is connected to the control circuit 37 via a power feeding determination unit 48 that detects the energized state of the commercial power source 11, a switching unit 49 that switches a power supply source, and an AC / DC converter 50. Are electrically connected.
AC200V power supplied from the commercial power supply 11 is converted into direct current by the AC / DC converter 50, then supplied to the control circuit 37, and after voltage adjustment or the like, is supplied to the electric device.

While the commercial power source 11 is energized, the AC 200 V power is directly supplied from the commercial power source 11 to the heat pump 14 via the connection terminal 45. Since the compressor 20 included in the heat pump 14 operates at AC 200V, such a design is made, but the present invention is not limited to this. The expansion valve 18, the propeller fan 24, and the temperature sensors 25 and 26, which are other electric devices included in the heat pump 14, are generally DC specifications, and therefore are converted from AC to DC in a power circuit (not shown) of the heat pump 14. The adjusted electric power is supplied to the expansion valve 18, the propeller fan 24, and the temperature sensors 25 and 26.

The switching means 49 mainly comprises a switch, and electrically connects either the connection terminal 45 or the connection terminal 47 to the electric device according to the power supply state of the commercial power supply 11.
The power supply determination unit 48 is, for example, a current detector, and determines whether the commercial power supply 11 is energized or is in a power failure.
When the power supply determination unit 48 detects a power failure of the commercial power supply 11, the switching unit 49 disconnects the connection terminal 45 and the electric device and electrically connects the connection terminal 47 to the electric device (except for the electric device of the heat pump 14). To the power supply path from the external power supply 46 to the electric device (excluding the electric device of the heat pump 14).

While the commercial power supply 11 is being supplied with power from the external power supply 46 due to a power failure, of the electric equipment connected to the control circuit 37, the electric equipment excluding the circulation pumps 15, 39, 42 and the heaters 27, 38, and the heat pump 14 Electric power is not supplied to all the electric devices included in, and these electric devices do not operate.
On the other hand, while power is supplied from the external power source 46, the circulation pumps 15, 39, 42 and the heaters 27, 38 for preventing freezing can be supplied with power, and the circulation pumps 15, 39, 42, and heaters can be supplied. 27 and 38 are ready for operation.

Accordingly, when power is supplied from the external power source 46, the water heater 10 restricts the electric devices to operate, for example, does not boil hot water in the hot water storage tank 12, but only performs a freeze prevention operation, etc. It will drive while suppressing the function. For this reason, during the power failure of the commercial power supply 11, it is possible to protect only a minimum amount of equipment and maintain a state in which the hot water supply operation can be started early after power is restored.
When the power supply determination unit 48 detects that the commercial power supply 11 has been turned off, the switching unit 49 disconnects the connection terminal 47 from the electric device, the control circuit 37, and the AC / DC converter 50. Thus, the connection terminal 45 is electrically connected to the electric device, the control circuit 37 and the AC / DC converter 50 so that the electric power is supplied from the commercial power supply 11 to the electric device.

Here, the external power source 46 is a storage battery system or a private generator, and in this embodiment, AC 100V power can be supplied and the connection terminal 47 is connected to the external power source 46. For this reason, in the present embodiment, a voltage switching unit 51 is provided between the connection terminal 47 and the switching unit 49 to adjust AC100V power from an external power source to AC200V (predetermined voltage).
In addition, when an external power supply that outputs DC power (for example, a DC12V or DC24V external power supply) is used instead of an AC output external power supply, the power from the external power supply can be added by adding a DC / AC converter. Thus, the electric device can be made operable.

In the present embodiment, when the commercial power supply 11 is energized, the connection terminal 47 is not physically connected to the external power supply 46, and when the commercial power supply 11 is in a power failure state, the connection terminal 47 is physically connected to the external power supply 46. To connect to. By doing in this way, the user can determine by operation whether the preferential supply destination of the electric power output from the external power supply 46 is the water heater 10 or a device other than the water heater 10. .
Alternatively, the connection terminal 47 may always be physically connected to the external power supply 46. In this case, a power failure of the commercial power supply 11 is detected, and the switching means 49 electrically connects the electric device and the external power supply 46. By doing so, the electric power from the external power supply 46 is automatically supplied to the water heater 10.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and all changes in conditions and the like that do not depart from the gist are within the scope of the present invention.
For example, the hot water heater may be heated by a gas burner, an oil burner, a heater, solar heat, or the like instead of the heat pump, or may not have a hot water storage tank.
And a heat source machine is not limited to a hot water supply machine, What is necessary is just an apparatus provided with an electric equipment, and supplying heat to the exterior, for example, the apparatus which supplies the heated heat medium to a floor heating panel may be sufficient as it. .
Furthermore, power may be supplied to the operation panel while power is supplied from the external power source.

DESCRIPTION OF SYMBOLS 10: Hot water supply machine, 11: Commercial power supply, 12: Hot water storage tank, 13: Boiling circuit, 14: Heat pump, 15: Circulation pump, 16: Heat medium circulation circuit, 17: Heat exchanger, 18: Expansion valve, 19: Heat exchanger, 20: compressor, 21: water supply pipe, 22: hot water supply pipe, 23: temperature sensor, 24: propeller fan, 25, 26: temperature sensor, 27: heater, 28: pressure reducing valve, 29: temperature sensor, 30: bathtub circuit, 31: bathtub, 32: mixing valve, 33: temperature sensor, 34: mixing valve, 35: temperature sensor, 36: operation panel, 37: control circuit, 38: heater, 39: circulation pump, 40: Temperature sensor, 41: heat exchanger, 42: circulation pump, 43: tracking circuit, 44: housing, 45: connection terminal, 46: external power supply, 47: connection terminal, 48: power supply determination means, 49: switching means, 50: AC / DC converter 51: voltage switching means

Claims (6)

In a heat source machine having a connection terminal A connected to a commercial power source and operating an electric device by supplying power via the connection terminal A,
A connection terminal B connected to an external power source different from the commercial power source is provided, and a power supply path from the external power source to the electric device is secured via the connection terminal B when the commercial power source is out of power. Heat source machine. The heat source apparatus according to claim 1, further comprising: a power supply determination unit that detects a power supply state of the commercial power supply; and a switching unit that connects any one of the connection terminals A and B to the electric device. The heat source machine, wherein the power supply determination unit detects a power failure of the commercial power supply, and switches the connection source to the electric device from the connection terminal A to the connection terminal B. The heat source machine according to claim 1, further comprising voltage switching means for adjusting electric power from the external power source to a predetermined voltage. The heat source machine according to any one of claims 1 to 3, wherein when the electric power is supplied from the external power source, the electric device that operates is limited. 5. The heat source machine according to claim 1, wherein the connection terminal B is connected to the external power source when the commercial power source is in a power failure state. 6. The heat source machine according to any one of claims 1 to 4, wherein the connection terminal B is always connected to the external power source.

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