JPH04217720A - Air-heater - Google Patents

Abstract

PURPOSE:To avoid wasteful energy consumption by preventing heat-inertia mode operation from being performed even if heat-inertia operation mode is instructed when operation start-up time has been set. CONSTITUTION:A control circuit 6 includes an instantaneous warm-air switch 64 and a timer switch 65 by which operation start-up time is set. When the instantaneous warm-air switch 84 is manipulated, heat-inertia operation mode is instructed, in which a convection fan 3 is stopped and a gas burner 51 is put in operation. The control circuit 6 prevents heat-inertia mode operation from being performed even if the instantaneous warm-air switch 64 is manipulated when a timer switch 65 has been operated to set operation start-up time. Therefore, wasteful energy consumption till operation start-up time can be avoided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device capable of operating with residual heat.

0002

2. Description of the Related Art Conventionally, for example, when an instant hot air switch is operated, hot water in a hot water circuit is heated by a heating means of an outdoor unit and a heat exchanger, and this hot water is circulated by a circulation pump. Equipped with a preheat operation mode that preheats the hot water in the hot water circuit without dissipating heat in the indoor unit heat exchanger by stopping the operation of the indoor unit's convection fan, and when the heating switch is operated, the convection fan is activated. A heating device has been proposed that instantly blows out high-temperature air when the heating starts. Moreover, in many heating devices in recent years, by operating a timer switch and setting an operation start time, the heating device starts operation before the set time.

0003

[Problems to be Solved by the Invention] However, in conventional heating devices, regardless of whether or not the operation start time is set by operating the timer switch,
When the instantaneous hot air switch is operated, operation in the above-mentioned residual heat operation mode is started.

[0004] Generally, when an operation start time is set, it is sufficient to start operation at that time, so until then, there is no need to wastefully heat the hot water with the combustion heat of the burner.
Activates the circulation pump. For this reason, when the operation start time is set, there is a problem in that energy is wasted if the operation is performed in the residual heat operation mode.

An object of the present invention is to provide a heating device that does not perform preheating operation in the preheating operation mode even if the preheating operation mode is instructed when the operation start time is set, thereby eliminating wasteful use of energy. do.

[0006]

[Means for Solving the Problems] The present invention includes a blower casing for sending air into a room, a convection fan inside the blower casing, and a convection fan that generates an air flow toward the room.
A heating means for heating the air flowing in the blower casing, and a control means for controlling operation and stoppage of the convection fan and the heating means, and the control means controls the convection fan by operating the convection fan and the heating means. an instruction means for instructing a preheating operation mode in which the heating means is stopped and the heating means is activated; and a time setting means for setting an operation start time when the time setting means is operated. , adopted technical means to prohibit operation in the residual heat operation mode.

[0007]

[Operation] The present invention prevents operation in the preheat operation mode even if the operation instruction means is operated to instruct the preheat operation mode when the operation start time of the heating device is set by operating the time setting means. do not. Moreover, if the operation start time is set during the preheating operation, the preheating operation will be stopped. Therefore, the operation of the heating means remains stopped, and energy is not wasted.

[0008]

According to the present invention, energy saving can be achieved by prohibiting operation in the residual heat operation mode once the operation start time is set.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The heating device of the present invention will be explained based on the embodiments shown in FIGS. 1 to 3. 1 to 3 are the first embodiment of the present invention.
An example is shown. FIG. 1 is a block diagram showing a control circuit of a heating and cooling device, and FIG. 2 is a schematic diagram showing the heating and cooling device.

The air conditioning system 1 includes a blower casing 2, a convection fan 3, a refrigeration cycle 4, a hot water heating device 5, and a control circuit 6, which are connected to an indoor unit 7 located indoors and an outdoor unit 8 located outdoors. It is divided into.

The blower casing 2 is provided in the indoor unit 7, and has an inlet 21 at one end for sucking indoor air into the interior, and an outlet 22 at the other end for blowing out conditioned air into the room.

The convection fan 3 is provided inside the blower casing 2, and when energized, generates an air flow inside the blower casing 2 toward the room. The amount of air blown by the convection fan 3 can be switched between strong wind, weak wind, and breeze.

The refrigeration cycle 4 is well known and is composed of a refrigerant compressor 41, a refrigerant condenser 42, a refrigerant evaporator 43, and a refrigerant pipe 44 connecting these in an annular manner. When driven by an electric motor (not shown), the refrigerant compressor 41 compresses and discharges the refrigerant sucked into the refrigerant compressor 41 . The refrigerant condenser 42 condenses the refrigerant by exchanging heat between the refrigerant that has flowed in and the air blown by the fan 45. The refrigerant evaporator 43 evaporates the refrigerant by exchanging heat between the refrigerant that has flowed in and the air flowing inside the blower casing 2, and also cools and dehumidifies the air.

The hot water heating device 5 is a heating means of the present invention, and includes a gas burner 51, a combustion fan 52, an outdoor unit heat exchanger 53, a gas supply path 54, an indoor unit heat exchanger 55,
It is composed of a circulation pump 56 and a hot water circuit 57 that connects these pumps in a ring.

The gas burner 51 burns a mixture of fuel gas supplied from the gas supply path 54 and combustion air blown by the combustion fan 52. The outdoor unit side heat exchanger 53 heats the hot water by exchanging heat between the combustion heat of the gas burner 51 and the hot water flowing inside. The gas supply path 54 includes a switching section (not shown) that switches the combustion state of the gas burner 51 from a strong combustion state to a weak combustion state in several stages. Further, the amount of air blown by the combustion fan 52 is also changed depending on the combustion state of the gas burner 51.

The indoor unit heat exchanger 55 heats the air by exchanging heat between the inflowing hot water and the air flowing inside the blower casing 2. The circulation pump 56 generates a circulating flow within the hot water circuit 57 when energized.

The control circuit 6 includes a main switch 61, a cooling switch 62, a heating switch 63, and an instant hot air switch 6.
4. It has a timer switch 65, an intelligent timer circuit 66, a water temperature sensor 67, etc. This control circuit 6 reads the outputs of a main switch 61, a cooling switch 62, a heating switch 63, an instant hot air switch 64, a timer switch 65, and a water temperature sensor 67, and controls the convection fan 3, combustion fan 52, and circulation pump 56. In addition to controlling energization and de-energization, the gas burner 5
1 combustion control is performed. The control circuit 6 also controls the momentary hot air switch 6 while the intelligent timer circuit 66 is in operation.
4 is operated, the output of the instant hot air switch 64 is not read.

The main switch 61 controls the operation and stopping of the air conditioning system 1 when manually operated. When manually operated, the cooling switch 62 instructs the control circuit 6 to perform cooling operation in a cooling operation mode in which the electric motor that drives the convection fan 3 and the refrigerant compressor 41 is energized to cool the room, and to stop the cooling operation. do. When manually operated, the heating switch 63 instructs the gas burner 51 to perform a combustion operation, the convection fan 3 and the circulation pump 56 to energize the heating operation mode to heat the room, and to stop the heating operation.

The instantaneous hot air switch 64 is an instruction means of the present invention, and when manually operated, causes the gas burner 51 to perform a combustion operation, energizes the circulation pump 56, stops energizing the convection fan 3, and supplies hot water. This command instructs preheat operation using preheat operation mode, which preheats water, and stops preheat operation.

The timer switch 65 is a time setting means of the present invention, and is used to manually set the start time of the cooling operation mode or the heating operation mode. The intelligent timer circuit 66 is built into the control circuit 6, and the temperature of the indoor air is set to the room temperature at the start time of the cooling operation mode or the heating operation mode, and the convection is started a predetermined time (for example, 30 minutes) before the operation start time. fan 3,
Gas burner 51, combustion fan 52, and circulation pump 5
This is a circuit that operates air conditioning equipment such as No. 6. Water temperature sensor 6
7 detects the temperature of the hot water in the hot water circuit 57, converts the detected value into an electrical signal, and sends it to the control circuit 6.

FIG. 3 is an operational flowchart showing the control of the control circuit 6 in this embodiment in the preheating operation mode and in the timer setting. First, it is determined whether a driving start time has been set (step S1). When the operation start time is not set (N), it is determined whether the preheat operation mode is instructed (step S2). When preheat operation mode is not instructed (N), control of preheat operation mode and timer set is ended.

In step S2, when the preheat operation mode is instructed (Y), the circulation pump 56 is energized (
Step S3). Then, the temperature of the hot water is a first predetermined temperature (
For example, determine whether the temperature has dropped below 55℃ (
Step S4). When the temperature of the hot water has not decreased below the first predetermined temperature (N), it is determined whether the heating operation mode is instructed (step S5). When the heating operation mode is not instructed (N), control in step S4 is performed.

[0023] In step S4, the temperature of the hot water reaches the first level.
When the temperature has decreased below the predetermined temperature (Y), the gas burner 51
is weakly combusted (step S6). Then, it is determined whether the temperature of the hot water has risen to a second predetermined temperature (for example, 65° C.) or higher (step S7). When the temperature of the hot water has not risen above the second predetermined temperature (N), it is determined whether the heating operation mode is instructed (step S8). When heating operation mode is not instructed (N), step S
7 control is performed.

[0024] In step S7, the temperature of the hot water reaches a second level.
When the temperature has risen above a predetermined temperature (Y), the gas burner 51
combustion is stopped (step S9), and it is determined whether the heating operation mode is instructed (step S10). When heating operation mode is not instructed (N), step S
4 control is performed.

[0025] In steps S5, S8, and S10, when the heating operation mode is instructed (Y), the convection fan 3
Electricity is applied and heating operation is controlled (step S11).

When the operation start time is set (Y) in step S1, it is determined whether the time is a predetermined time before the operation start time (step S12). When the time is not a predetermined time before the operation start time (N), step S
12 controls are performed.

In step S12, at a time (Y) which is a predetermined time before the operation start time, the circulation pump 56 is energized, the gas burner 51 is combusted, and the convection fan 3 is energized to control the heating operation (step S13).

A method of controlling the heating and cooling system 1 during the residual heat operation mode and when setting the timer will be explained with reference to FIGS. 1 and 2.

When the main switch 61 is turned on, the control circuit 6, the air conditioning appliance, and a power source (not shown) are connected, and the air conditioning system 1 is started. At this time, when the instant hot air switch 64 is turned on, the circulation pump 56 is energized by the control circuit 6. At this time, the control circuit 6 reads the temperature of hot water in the hot water circuit 57 detected by the water temperature sensor 67, and energizes the combustion fan 52 when the temperature of the hot water has decreased to a first predetermined temperature or less. Then, the gas burner 51 starts combustion.

[0030] Therefore, the hot water flowing in the outdoor unit side heat exchanger 53 is heated by the combustion heat generated by the combustion of the gas burner 51, and becomes high-temperature hot water. This high-temperature hot water flows into the indoor unit-side heat exchanger 55 through the piping of the hot water circuit 57 due to the pumping force of the circulation pump 56 .

At this time, since the convection fan 3 is not energized, the heat exchanger 55 on the indoor unit side does not radiate heat, so the hot water is returned to the heat exchanger 53 on the outdoor unit side while maintaining its temperature and is recycled again. heated. By repeating this operation, the hot water is preheated.

During this preheating operation, since heat is not radiated by the indoor unit heat exchanger 55 as described above, the combustion state of the gas burner 51 is controlled so that the temperature of the hot water does not rise above the second predetermined temperature. By operating in a weak combustion state, the combustion amount of the gas burner 51 is regulated, and when the temperature of hot water rises to a second predetermined temperature or higher, the combustion of the gas burner 51 is controlled to be stopped.

When the heating switch 63 is turned on, the convection fan 3 is energized by the control circuit 6, and the cold indoor air sucked into the ventilation casing 2 by the operation of the convection fan 3 is transferred to the indoor unit side. The retained heat of the preheated hot water flowing in the heat exchanger 55 is taken away, and the air instantly becomes high temperature, which is blown into the room from the air outlet 22. With this instant warm air function, it is possible to instantly heat the room. In addition, when the instantaneous hot air starts, the air flow rate of the convection fan 3 is set to a slight breeze for a predetermined period of time (for example, 2 minutes) by the operation of the control circuit 6, thereby further increasing the temperature of the hot air blown from the air outlet 22. You can also do it. Further, this instant warm air function is automatically canceled when a set time (for example, 12 hours) has elapsed after the preheat operation mode was instructed.

At this time, when the timer switch 65 is operated to set the operation start time of the air conditioning system 1, the intelligent timer circuit 66 starts operating, and the convection fan 3 and the combustion The energization of the fan 52 and the circulation pump 56 is stopped, the combustion of the gas burner 51 is stopped, and the preheating operation is interrupted.

Note that the intelligent timer circuit 66
Even if the user operates the instant hot air switch 64 to instruct the preheating operation mode during operation, the control circuit 6 does not read the instruction signal and therefore does not perform the preheating operation. Further, if the timer switch 65 is operated during the preheating operation, the preheating operation is stopped. Therefore, the heating operation remains suspended and energy such as electricity and fuel gas is not wasted.

As described above, in this embodiment, when the timer switch 65 is operated to set the operation start time, the preheating operation is prohibited, so that energy saving can be achieved.

(Modification) In this embodiment, the intelligent timer circuit is controlled to operate when the timer switch is operated, but the heating operation may be controlled to start at the operation start time when the timer switch is operated. . In this example, a combination of a gas burner and an outdoor unit heat exchanger was used as a heating means, but an electric heater that consumes electricity to generate heat, a burner that burns liquid fuel, and an outdoor unit heat exchanger were used in combination. It's okay.

In this embodiment, even if the preheat operation mode is instructed when the operation start time is set, the control circuit does not read this instruction signal to avoid preheat operation, but even if the instruction signal is read, the preheat operation mode is avoided. Control may be performed so that the residual heat operation does not start. Alternatively, the air flowing inside the blower casing may be directly heated by a heating means such as a burner or an electric heater.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control device for a heating and cooling device according to the present invention.

FIG. 2 is a schematic diagram showing a heating and cooling device of the present invention.

FIG. 3 is an operation flowchart showing the operation of the control circuit of the first embodiment in the preheating operation mode and when setting the timer.

[Explanation of symbols]

1　Heating and cooling equipment (heating equipment) 2　Blower casing 3 Convection fan 5 Hot water heating device (heating means) 6 Control circuit (control means)

Claims (1)

[Claims] Claim 1: (a) a blower casing for blowing air into a room; (b) a convection fan in the blower casing that generates an air flow toward the room; (c) air flowing inside the blower casing. (d) a control means for controlling activation and deactivation of the convection fan and the heating means, and the control means, when operated, controls the operation of the convection fan. an instruction means for instructing a preheat operation mode in which the heating means is stopped and the heating means is activated, and a time setting means for setting an operation start time by operating the time setting means, and when the time setting means is operated, the preheat operation mode is activated. A heating device characterized by prohibiting operation depending on the operation mode.