JP3170749B2 - Hot water heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating apparatus comprising an outdoor unit and an indoor unit, for transporting hot water heated by the outdoor unit to the indoor unit for heating.

[0002]

2. Description of the Related Art FIG. 4 is a schematic diagram of a hot water heating apparatus, and FIG. 5 is a block diagram of a main part thereof. In the figure, reference numeral 1 denotes an outdoor unit, in which a combustion unit 2 including a vaporizer, a vaporization heater, a combustion fan, a fuel pump, and the like, and a combustion unit 2 are provided.
A heat receiving heat exchanger 3 that is provided above and warms the circulated hot water, a cis tank 4 that stores the warmed hot water, a circulation pump 5 that conveys and circulates the hot water in the cis tank 4 to an indoor unit described below, A water temperature sensor 6 provided between the heat exchanger 3 and the cis tank 4 for detecting the temperature of the warm water heated by the heat exchanger 3 for heat reception, and an outdoor unit-side control unit 7 for controlling the operation of the outdoor unit 1 It has.

An indoor unit 8 has an operation / display unit 9 having an operation switch 9a, a room temperature setting unit 9b for setting a desired room temperature, and a room temperature display unit (not shown) for displaying the room temperature. Inside, a heat-dissipating heat exchanger 10 for warming the air by the heat of the hot water conveyed from the outdoor unit 1, a blower fan 11 for sending the warmed air into the room, and an indoor sensor 12 for detecting the temperature of the room, A water temperature sensor 13 provided at the hot water inlet of the heat radiating heat exchanger 10 for detecting the temperature of the hot water conveyed from the outdoor unit 1, and an electric type provided at the hot water outlet of the heat radiating heat exchanger 10 for opening and closing the hot water outlet. Opening / closing valve 14 and the indoor unit-side control unit 1 for controlling the operation of the indoor unit 8
5 is provided. The outdoor unit 1 and the indoor unit 8 are connected by a hot water pipe 16 through which hot water circulates, and the outdoor unit-side control unit 7 and the indoor unit-side control unit 15 are electrically connected by a signal line.

In the hot water heating apparatus thus configured, a desired room temperature is set by the room temperature setting section 9b of the operation / display section 9 of the indoor unit 8, and when the operation switch 9a is turned on, the room of the indoor unit 8 is turned on. The unit-side control unit 15 sends an ON signal of the operation switch 9a to the outdoor unit-side control unit 7 of the outdoor unit 1,
The outdoor unit-side control unit 7 starts energization of the vaporization heater to preheat the vaporizer of the combustion unit 2. Next, when the temperature of the vaporizer of the combustion unit 2 reaches a predetermined temperature, that is, when the preheating is completed, the fuel pump of the combustion unit 2 is driven to start combustion, and heats the heat receiving heat exchanger 3. . And
The operation of the circulation pump 5 and the blower fan 11 of the indoor unit 8 is started, and the hot water passing through the heat-receiving heat exchanger 3 is warmed by the heat-receiving heat exchanger 3 by the circulation pump 5, and the hot water piping is passed through the cis tank 4. From 16, it is conveyed to the indoor unit 8. The transferred hot water is supplied to the heat exchanger 10 for radiating heat of the indoor unit 8.
The heat exchanges with the air in the indoor unit 8 by the hot water piping 16.
It is further transported to the outdoor unit 1. Then, the warmed air in the indoor unit 8 is sent into the room by the blower fan 11. This is repeated to warm the room to the set room temperature based on the room temperature detected by the room sensor 12. When the room reaches the set room temperature, the indoor unit-side control unit 15
Further, the outdoor unit-side control unit 7 reduces the air volume of the blower fan 11 and the combustion amount of the combustion unit 2, and thereafter controls the blower fan 11 and the combustion unit 2 so that the set room temperature is maintained.

During heating, the amount of combustion in the combustion section 2 of the outdoor unit 1 is controlled based on the temperature of the hot water from the heat receiving heat exchanger 3 detected by the water temperature sensor 6.
1 is controlled based on the temperature of the hot water from the outdoor unit 1 detected by the water temperature sensor 13. In addition, on-off valve 1
4 is controlled based on the room temperature detected by the room temperature sensor 12.

[0006]

In the conventional hot water heating apparatus as described above, the cold air in the indoor unit 8 is blown by the blowing fan 1.
Operation switch 9 so that it is not sent out into the room by
Even if a is turned on, the operation of the circulation pump 5 and the blower fan 11 is not started, and the combustion section 2 does not start combustion until its vaporizer reaches a predetermined temperature and completes preheating. However, it takes a long time to complete the preheating of the vaporizer, it takes time to obtain the temperature of the hot water required for heating, and there is a problem that the heating to the set room temperature in the room is delayed.

Therefore, in order to solve the above-mentioned problem, the carburetor of the combustion section 2 is preheated even when the operation of the apparatus in which the operation switch 9a is in the OFF state is performed, so that the combustion can be started. (Operation switch 9a is ON)
To reduce the time from start of combustion to
Such a hot water heating device is disclosed in JP-A-6-2950. However, when the hot water temperature corresponding to the outdoor temperature is lower than a predetermined temperature, for example, 0 ° C., during operation stop, the hot water heating device disclosed in the above publication performs energization of the vaporization heater to vaporize. Since it is necessary to preheat the vessel and keep it in a state where combustion can be started immediately, for example, even if heating is not performed for several days, the evaporator is preheated during that time, wasting electricity There was a risk that it would be uneconomical to consume too much.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide an economical hot water heating apparatus capable of improving quick heating and convenience. It is.

[0009]

A hot water heating apparatus according to the present invention comprises an operation switch, operation / display means having a room temperature setting section and a room temperature display section, a heat exchanger for heat radiation, a blower fan,
An indoor unit having room temperature detecting means, and an indoor unit-side control means for controlling these operations, a heat receiving heat exchanger, a combustion means for heating the heat receiving heat exchanger, and hot water heated by the heat receiving heat exchanger An outdoor unit having a water temperature detecting means for detecting temperature, a circulating pump for circulating hot water, and an outdoor unit-side control means for controlling the operation thereof and electrically connected to the indoor unit-side control means; A hot water pipe for connecting the air conditioner and the outdoor unit, and the operation / display means includes an indoor unit for heating the room to a desired indoor temperature set by the room temperature setting unit so as to have a temperature lower than that in the normal heating operation. And a warming operation switch for warming the outdoor unit is provided .
The room is kept at a predetermined low heating temperature without displaying the temperature.
The warming operation of the indoor unit and the outdoor unit is performed as described above.

[0010]

FIG. 1 is a block diagram of a main part of an embodiment of the present invention. The same parts as those in the conventional example described with reference to FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof will be omitted. In the drawing, reference numeral 9c denotes a warming operation switch provided on the operation / display unit 9 of the indoor unit 8 of the hot water heating apparatus in FIG. 4, and in this embodiment, the warming operation switch 9c in FIGS. When turned on, the outdoor unit 1 and the indoor unit 8 operate the room by setting the room temperature setting unit 9 b of the operation / display unit 9.
A warming operation is performed so that a person who is at a lower temperature than during the normal heating operation in which heating is performed so as to reach a desired indoor temperature set by the user does not feel cold (hereinafter, referred to as a low heating temperature), When the operation switch 9a is turned on during the warming operation, the operation of the outdoor unit 1 and the indoor unit 8 is automatically switched from the warming operation to the normal heating operation to heat the room to a desired indoor temperature. It is. The low heating temperature during the warming operation is a predetermined temperature, but is preferably in the range of 5 ° C to 15 ° C, more preferably in the range of 8 ° C to 12 ° C, and still more preferably 10 ° C.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, when a desired indoor temperature is set by the room temperature setting unit 9b of the operation / display unit 9 of the indoor unit 8 and the operation switch 9a is turned on (step 21), the indoor unit-side control unit 15 of the indoor unit 8 sets the outdoor unit. A warming operation release signal and an ON signal of the operation switch 9a, which will be described later, are sent to the outdoor unit-side control unit 7 of the unit 1 (steps 22 and 23), and whether a desired indoor temperature (set room temperature T) is set or not. Confirm (step 24). At this time, if the desired room temperature is not set, the preset room temperature is set as the set room temperature T (step 25). Next, the indoor unit-side control unit 15 compares the detected room temperature T1 detected by the room temperature sensor 12 with the set room temperature T (step 26), and when the detected room temperature T1 is lower than the set room temperature T, the outdoor unit 1 of the outdoor unit 1 A normal heating operation signal of the apparatus is sent to the control unit 7 and the blower fan 11 is operated (step 27). Upon receiving the normal heating operation signal, the outdoor unit-side control section 7 starts energization of the vaporization heater of the combustion section 2 to preheat the vaporizer, starts the operation of the combustion section 2 and operates the circulation pump 5 (step). 27). Then, the hot water warmed by the heat receiving heat exchanger 3 is conveyed to the indoor unit 8 from the hot water pipe 16 by the circulation pump 5, and
The heat is exchanged with the air in the indoor unit 8 by the heat exchanger 10 for heat radiation of the indoor unit 8. The air warmed by the heat exchange is sent into the room by the blower fan 11. Such normal heating operation is performed until the detected room temperature T1 is equal to or higher than the set room temperature T, and the room is heated to a desired room temperature (steps 26 and 27). During the normal heating operation, the room temperature is displayed on the room temperature display section of the operation / display section 9.

Next, when the detected room temperature T1 is equal to or higher than the set room temperature T, the outdoor unit-side control unit 7 and the indoor unit-side control unit 1 thereafter maintain the room at the set room temperature T.
5 controls the combustion unit 2 and the like, such as reducing the combustion amount of the combustion unit 2 and the air volume of the blower fan 11, or temporarily stopping the operation of the combustion unit 2, the circulation pump 5 and the blower fan 11 (step 28). The normal heating operation is performed until the operation switch 9a is turned off (steps 29 and 26).
…). When the operation switch 9a is turned off, the outdoor unit-side control unit 7 and the indoor unit-side control unit 15 stop all operations of the combustion unit 2 and the like and end the operation of the normal heating (step 30).

On the other hand, when the operation switch 9a is turned off and the warming operation switch 9c is turned on (step 31), the indoor unit-side control unit 15 of the indoor unit 8 sends a warm-up signal to the outdoor unit-side control unit 7 of the outdoor unit 1. ON of the mining operation switch 9c
A signal is sent (step 32), and a predetermined room temperature t which is a predetermined low heating temperature (for example, 10 ° C.) and the room temperature sensor 12
Is compared with the detected room temperature T1 (step 3).
3) When the detected room temperature T1 is lower than the predetermined room temperature t, a warming operation signal of the device is sent to the outdoor unit control unit 7 of the outdoor unit 1 and the blower fan 11 is operated. When receiving the warming operation signal, the outdoor unit-side control section 7 starts energization of the vaporization heater of the combustion section 2 to preheat the vaporizer,
The operation of the combustion unit 2 is started and the circulation pump 5 is operated (step 34). Then, the warm water slightly warmed by the heat receiving heat exchanger 3 slightly warmed by the heat of the vaporizing heater of the combustion unit 2 is heated by the circulation pump 5 to the hot water piping 1.
6, the heat is transferred to the indoor unit 8, and some heat of the hot water is exchanged with the air of the indoor unit 8 by the heat exchanger 10 for heat radiation of the indoor unit 8. The slightly warmed air is sent into the room by the blower fan 11. That is, even during the preheating of the carburetor of the combustion unit 2, the air in the indoor unit 8 is slightly warmed by the slight heat stored in the circulating hot water. Such a warming operation is performed until the detected room temperature T1 is equal to or higher than the predetermined room temperature t (steps 33 and 3).
4). During the warming operation, the room temperature is not displayed on the room temperature display section of the operation / display section 9 to distinguish it from the normal heating operation.

Next, when the detected room temperature T1 is equal to or higher than the predetermined room temperature t, the outdoor unit-side control unit 7 and the indoor unit-side control unit are thereafter controlled so that the room is maintained at the predetermined room temperature t which is a low heating temperature. Reference numeral 15 controls the combustion unit 2 and the like, such as reducing the combustion amount of the combustion unit 2 and the air volume of the blower fan 11, or temporarily stopping the operation of the combustion unit 2, the circulation pump 5, and the blower fan 11 (step 36). The warming operation is performed until the warming operation switch 9c is turned off (steps 38, 33,...). Then, when the warming operation switch 9c is turned off, the outdoor unit-side control unit 7 and the indoor unit-side control unit 15 stop all operations of the combustion unit 2 and the like and end the warming operation (step 39).

During the warming operation, the indoor unit side control unit 15
Is always in a state of waiting for the ON signal of the operation switch 9a (steps 35 and 37), and the operation switch 9a is ON.
As shown in FIG. 3, the warming operation of the device is canceled, that is, the warming operation switch 9c is forcibly turned off to switch to the normal heating operation, and the outdoor unit-side control unit 7 and the indoor unit-side control unit The normal heating operation described above is performed by step 15 (steps 22, 23,...). At this time, the combustion unit 2, the circulation pump 5, and the blower fan 11 have already been operated by the warming operation, and the room is at a low heating temperature or a room temperature close to the low heating temperature. Normal heating is started immediately without waiting for preheating of the vaporizer of the section 2 or the like.

As described above, the warming operation switch 9c for warming the outdoor unit 1 and the indoor unit 8 is provided so that the temperature of the room becomes lower than that during the normal heating operation, and the operation switch 9a is operated during the warming operation. When turned on, the warming operation switch 9c is forcibly turned off.
Then, the warming operation is automatically switched to the normal heating operation. Therefore, when the operation is switched to the normal heating operation, the combustion unit 2, the circulation pump 5, and the blowing fan 1
1 has already been operated, and especially the carburetor of the combustion section 2 has already been preheated, so that the normal heating operation can be performed quickly without waiting for the completion of preheating. This makes it possible to obtain a hot water heating device that is quick and convenient. During the warming operation, the warm water is circulated even during preheating of the carburetor of the combustion unit 2 to use a little heat of the warm water to warm the air in the indoor unit 8 and send the air into the room. Since the room can be kept at a low heating temperature, the room does not need to be kept in a cold state forever, and quick heating can be improved. Furthermore, since the apparatus is operated when needed, wasteful power is not consumed, and a hot water heating apparatus can be obtained economically.

In the above-described embodiment, the case where the indoor temperature during the warming operation is a predetermined low heating temperature and a predetermined room temperature t (10 ° C.) has been described as an example. The low heating temperature may be arbitrarily set within the range of the low heating temperature, for example, 5 ° C. to 15 ° C. by the room temperature setting unit 9b.

In the above embodiment, the case where the outdoor unit 1 and the indoor unit 8 are operated during the warming operation has been described as an example. However, when the warming operation switch 9c is turned on, the indoor unit 8 is operated. Blower fan 11
Only the stoppage may be stopped, and the air warmed by the conveyed warm water and the heat radiating heat exchanger 10 of the indoor unit 8 may be sent out to the room by natural convection of the air.

Further, in the above-described embodiment, the case where the warming operation switch 9c for performing the warming operation is provided separately from the operation switch 9a for performing the normal heating operation has been described. The normal heating operation and the warming operation may be performed by only one switch, for example, the operation switch 9a. The operation switching lever is also omitted, and the operation switch 9 is operated.
The two operations may be switched by changing the number of times of operation a, and the corresponding operation may be performed.

[0020]

As described above, the hot water heating apparatus according to the present invention comprises an operation switch, operation / display means having a room temperature setting section and a room temperature display section, a heat exchanger for radiating heat, a blower fan, a room temperature detecting means, and the like. Indoor unit having an indoor unit-side control means for controlling the operation of the heat exchanger, a heat receiving heat exchanger, a combustion means for heating the heat receiving heat exchanger, and a water temperature detection for detecting the temperature of the hot water heated by the heat receiving heat exchanger Means, a circulating pump for circulating hot water, and an outdoor unit having an outdoor unit-side control means electrically controlling the operation thereof and electrically connected to the indoor unit-side control means, and connecting the indoor unit and the outdoor unit with hot water circulating. And a warm water pipe for warming the indoor unit and the outdoor unit so that the operation / display unit has a temperature lower than that in the normal heating operation in which the room is heated to a desired room temperature set by the room temperature setting unit. The warming operation switch for operating provided during warming operation, the indoor temperature in the room display unit
The room temperature reaches a predetermined low heating temperature without displaying the degree
An indoor unit and outdoor unit in <br/> to drive warming as hot water heat is circulated to the preheating period of the combustion unit can also be effectively utilized Rutotomoni, indoor promptly cold
Can be felt to a lesser degree, allowing the device
Convenience can be improved. Also, let me show the room temperature
To facilitate differentiation from normal heating operation
Room temperature, even though the equipment is running
Misunderstanding and misunderstanding with normal heating operation
A hot water heating system with good convenience
Obtainable.

[Brief description of the drawings]

FIG. 1 is a block diagram of a main part of an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment of the present invention.

FIG. 3 is a time chart showing the operation of the embodiment of the present invention.

FIG. 4 is a schematic diagram of a hot water heating device.

FIG. 5 is a block diagram of a main part of a conventional hot water heating device.

[Explanation of symbols]

1 outdoor unit, 2 combustion unit, 3 heat exchanger for heat reception, 5 circulation pump, 6,13 water temperature sensor, 7 outdoor unit side control unit,
8 indoor unit, 9 operation / display unit, 9a operation switch,
9b room temperature setting part, 9c warming operation switch,
10 heat exchanger for heat radiation, 11 blower fan, 12 room temperature sensor, 15 indoor unit side control unit, 16 hot water piping.

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-7-35355 (JP, A) JP-A-7-55166 (JP, A) JP-A 9-145069 (JP, A) (58) Field (Int. Cl. ⁷ , DB name) F24D 3/00

Claims (1)

(57) [Claims] 1. An indoor unit having an operation switch, operation / display means having a room temperature setting section and a room temperature display section, a heat exchanger for radiating heat, a blower fan, a room temperature detecting means, and an indoor unit-side control means for controlling these operations. And a heat exchanger for heat reception, a combustion means for heating the heat exchanger for heat reception, a water temperature detection means for detecting the temperature of hot water heated by the heat exchanger for heat reception, a circulation pump for circulating hot water, and An outdoor unit having an outdoor unit-side control means electrically controlling the operation of the indoor unit-side control means, and a hot water pipe for circulating hot water and connecting the indoor unit and the outdoor unit, The operation / display unit is configured to perform a warming operation of the indoor unit and the outdoor unit such that the indoor unit and the outdoor unit are operated at a temperature lower than that in the normal heating operation of heating the room to a desired indoor temperature set by the room temperature setting unit. The timing operation switch is provided, c
During the warming operation, the room temperature is displayed on the room temperature display.
Without lowering the room to a predetermined low heating temperature
A hot water heating apparatus characterized in that the indoor unit and the outdoor unit perform a warming operation .