KR960005775B1 - Room heating device - Google Patents

Abstract

The hot-water type heating apparatus includes a ventilation casing(1), a convection fan(3), an indoor heat exchanger(51), a bottom heater(52), a heating means(6), a switching means(55), a detecting means(74), and a control means(7). The apparatus can prevent the excessive temperature rise of the indoor heat exchanger when supplying hot water to the indoor heat exchanger and the bottom heater.

Description

Hot Water Heating

1 is a block diagram showing a control unit of an air conditioner applied as a hot water heater of the present invention.

2 is a schematic view showing the overall structure of the air conditioner.

3 is an explanatory diagram showing an area for a set temperature.

4 is a time chart showing the control of the convection fan during the heating operation of the control circuit.

5 is a time chart showing a first operation of a control circuit.

6 is a time chart showing the control of the convection fan during the heating operation of the control circuit.

7 is a time chart showing a second operation of the control circuit.

8 is a time chart showing the second operation of the control circuit.

9 is a flowchart showing the control of the convection fan at the start of heating operation by the control circuit.

10 is a flowchart showing the control of the convection fan in the heating operation control by the control circuit.

* Explanation of symbols for main parts of the drawings

1: Air Conditioning Device (Hot Water Heating System) 2: Blowing Casing

3: convection fan 5: hot water circuit

6: gas butter (heating means) 7: control circuit (control means)

51: indoor heat exchanger 52: floor heater

74: room temperature sensor (detection means)

The present invention relates to a hot water heater for performing indoor heating and floor heating by hot water.

BACKGROUND ART Conventionally, a hot water heating apparatus is known in which hot water heated by combustion heat of a burner is supplied to an indoor heat exchanger or a floor heater of an indoor heater to perform a warm air alone operation only for indoor heating or simultaneous operation of indoor heating and floor heating. In such a hot water heating device, when the indoor temperature rises above a predetermined value, for example, the set temperature, the intermittent operation is repeated to turn the convection fan on and off to maintain the indoor temperature at the set temperature.

By the way, in the conventional hot water heater, the combustion of the burner is stopped at the same time as when the convection fan is turned on during the hot air alone operation or slightly before the off of the convection fan. Since the burner is combusted to supply hot water, the hot water is supplied to the floor heater and the indoor heat exchanger, and thus the indoor temperature is easily increased by the heat dissipation of the floor heating or the heat dissipation of the indoor heat exchanger.

Therefore, during simultaneous operation, if the convection fan is turned on and off at the same interval as the hot air single operation, the temperature of the indoor heat exchanger is further increased, and the temperature sensor installed near the indoor heat exchanger cannot detect the correct temperature. There was a problem.

It is an object of the present invention to provide a hot water heater that prevents excessive temperature rise of an indoor heat exchanger when hot water is supplied to both sides of an indoor heat exchanger and a floor heater.

In order to achieve the above object, according to the present invention, the blowing casing for blowing the air toward the interior, the convection fan for generating an air flow toward the interior in the blowing casing, flowing the inside of the blowing casing by hot water When the air is heated, the indoor heat exchanger for heating the room, the floor heater for heating the floor by hot water, the heating means for heating the hot water, and the first hot water supply passage for flowing the hot water heated by the heating means only to the indoor heat exchanger. And a technical means having switching means for switching a second hot water supply path for flowing hot water heated by the heating means to both the indoor heat exchanger and the floor heater.

In addition, the present invention includes a detecting means for detecting an indoor temperature in the vicinity of the indoor heat exchanger, and when the indoor temperature detected by the detecting means rises above a predetermined temperature, the heating means is switched to the first hot water supply passage. And performing a first operation of repeating on / off of the convection fan, and when switching to the second hot water supply path, operating the heating means according to the operation of the floor heater, and the convection fan in the first operation. Technical means including a control means for performing a second operation of repeating the on / off of the convection fan in a second on time longer than the first on time is employed.

According to the present invention, the heating means and convection when the indoor temperature is higher than the predetermined temperature is switched to the first hot water supply path by the switching means, that is, when the hot water heated by the heating means is supplied only to the indoor heat exchanger. The fan maintains the temperature of the indoor heat exchanger at a predetermined temperature by performing the first operation of repeating on and off. In addition, when the room temperature rises above the predetermined temperature, when the switching means is switched to the second hot water supply path, that is, when hot water heated by the heating means is supplied to both sides of the indoor heat exchanger and the floor heater, the heating means is bottomed. While operating in accordance with the operation of the heater, the convection fan performs the second operation of turning on and off at a second temperature longer than the first temperature of the convection fan in the first operation, thereby causing the floor heater to heat during the second operation. Even if the heating means is turned on to supply hot water to the hot water, the temperature of the indoor heat exchanger is greatly increased. For this reason, the temperature of the ambient temperature of the room temperature detection means arranged near the indoor heat exchanger becomes closer to the room temperature, and the reliability of the detected value of the room temperature becomes high.

Hereinafter, the hot water heater of the present invention will be described based on the embodiment shown in FIGS. 1 to 3.

1 is a block diagram showing a control unit of an air conditioner applied as a hot water heater of the present invention, and FIG. 2 is a view showing the overall structure of the air conditioner.

The air conditioner (1) includes a blow casing (2), a convection fan (3), a heating device (4), a hot water circuit (5), a gas burner (6), and a control circuit (7). The elements are divided into an indoor unit 8 arranged indoors and an outdoor unit 9 arranged outdoors.

The blow casing 2 is installed in the indoor unit 8, and has an inlet 21 for sucking the indoor air at one end and a blower outlet 22 for exhausting the air flow into the room at the other end. ), A movable louver 23 driven by a stepping motor (not shown) is freely rotated.

The convection fan 3 is installed in the blow casing 2 and, when turned on, generates an air flow toward the inside of the blow casing 2. The air flow rate of the convection fan 3 is automatically controlled by the control circuit 7, and thus the air flow rate (fan speed) such as super breeze (10 speed), breeze (9 speed), promise (8 speed), etc. ) Is switched.

The cooling device 4 has a well-known configuration, and is composed of a refrigerant compressor 41, a refrigerant condenser 42, a refrigerant evaporator 43, and a refrigerant pipe 44 connecting them in an annular manner.

The refrigerant compressor 41 is installed in the outdoor unit 9, and the rotation speed varies depending on the frequency. The refrigerant compressor 41 discharges the refrigerant sucked and compressed from the refrigerant evaporator 43 toward the refrigerant condenser 42.

The refrigerant condenser 41 is installed in the outdoor unit 9 to exchange the refrigerant introduced therein with the outside air blown by the electric fan 45 to condense the refrigerant.

The refrigerant condenser 43 is installed in the blow casing 2 to heat-exchange the refrigerant introduced therein and the indoor air sucked by the convection fan 3 to evaporate the refrigerant to perform indoor cooling.

The hot water circuit 5 is mainly composed of an indoor heat exchanger 51 and a floor heater 52, an outdoor heat exchanger 53, a circulation pump 54, a solenoid valve 55, and a hot water pipe 56 connecting them. ) And the like.

The indoor heat exchanger 51 is installed downstream of the refrigerant evaporator 43 in the blow casing 2, so that some fins are connected to the fins of the refrigerant evaporator 43. The indoor heat exchanger 51 heats the indoor air by heat-exchanging the indoor air sucked by the hot water and the convection fan 3 to perform indoor heating. In addition, the indoor heat exchanger 51 constitutes a hot water type indoor heater with the blowing casing 2 and the convection fan 3.

The floor heater 52 is installed in the bypass bureau 57 branching between the heat exchanger 51 and the external heat exchanger 53 between the indoor heat exchanger 51 and the circulation pump 54, The floor heater 52 performs floor heating while heating the mat by hot water in a hot water mat installed on the floor of a room or a hot water panel assembled in the floor.

The outdoor heat exchanger 53 is installed in the outdoor unit 9 to heat the hot water flowing through the heat of combustion generated by the combustion of the gas burner 6 and the hot water flowing therein.

The circulation pump 54 is installed in the outdoor unit 9 to generate a circulation flow of hot water in the hot water circuit 5 so that the hot water heated by the outdoor heat exchanger 53 is transferred to the indoor heat exchanger 51 and the floor heater 52. Will be supplied.

As the switching means of the present invention, the solenoid valve 55 opens the bypass pipe 57 when it is installed in the outdoor unit 9, but closes the bypass pipe 57 when it is turned off. When the solenoid valve 55 is off, it forms the 1st hot water supply path (solid arrow of FIG. 2) which supplies the hot water heated by the outdoor heat exchanger 53 only to the indoor heat exchanger 51. FIG.

In addition, when the solenoid valve 55 is turned on, the second hot water supply path (2 dashed line in FIG. 2) supplies hot water heated by the outdoor heat exchanger 53 to both sides of the indoor heat exchanger 51 and the floor heater 52. Arrow).

The gas burner 6 is a heating means of the present invention, and is a mixed air in which the fuel gas supplied from the gas supply passage 61 and the combustion air blown by the combustion fan 62 are mixed in the air purifier 9. Will burn. In addition, the gas burner 6 is operated with the combustion capacity at the rated capacity as the blowing amount of the combustion fan 62 and the opening degree of the proportional valve 64 are changed.

In addition, the gas supply passage 61 changes the opening degree of the gas supply passage 61 to the gas burner 6 according to the solenoid valve 63 which opens the valve when it is turned on and closes the valve when turned off and the amount of energization. The proportional valve 64 which adjusts the supply amount of combustion gas is provided.

As the blowing amount of the combustion fan 62 is controlled by the control circuit 7, the amount of air (fan speed) is automatically switched, such as a breeze, a weak wind, a middle wind, and a strong wind.

The control circuit 7 is a control means of the present invention, the operation switch 71, the mode switching switch 72, the floor heating switch 73, the room temperature sensor 74, the room temperature setter 75 and the water temperature sensor 76 According to the output of the convection fan (3), refrigerant compressor (41), electric fan (45), net mixing pump (54), solenoid valve (55), combustion fan (62), solenoid valve (63) and proportional valve The amount of energization of 64 is controlled.

The operation switch 71 is a start switch of the air conditioner 1, and when it is turned on, the power switch (not shown) connects each electric mechanism of the air conditioner 1 to each other.

Mode switching switch 72 is a switch for switching the air conditioning mode of the room, when the operation of any one of the cooling operation (72a), heating operation (72b) and dry operation (72c) is selected to instruct the operation by the air conditioning mode Done.

When the floor heating switch 73 is off, the solenoid valve 55 is turned off to switch to the first hot water supply path, while when the floor heating switch 73 is turned on, the solenoid valve 55 is turned on to be switched to the second hot water supply path.

The room temperature sensor 74 is a detection means of the present invention, which is installed near the refrigerant evaporator, detects the temperature of indoor air sucked in the blowing casing 2, changes the detected value into an electrical signal, and applies it to the control circuit 7. do.

The room temperature setter 75 sets the temperature of the indoor air and converts the set value into an electric signal, which is popular with the control circuit 7. The water temperature sensor 76 detects the hot water temperature in the hot water circuit 5 and changes the detected value into an electric signal to apply it to the control circuit 7.

The control circuit 7 is, for example, shown in FIG. 3 by the temperature difference between the room temperature detected by the room temperature sensor 74 at the start of heating operation and the set temperature Ts set by the room temperature setter 75. The heating operation is started by determining the area and setting the initial operation code (see Table 1) based on the area.

In addition, the control circuit 7 changes the rank of the operation code to zero when the room temperature is maintained in the region k or the region j during the heating operation and the region does not change for a predetermined time.

In this case, the floor heating switch 73 is turned off, and as shown in the fourth time chart, the operation code becomes 0 (combustion static value of the gas burner 6) and the convection fan 3 is operated at 10 speeds (sec. Breeze) for 1 minute and then stopped.

Then, 3 minutes after the operation code becomes 0, the operation code is forcibly set to 1 (combustion gas of the gas burner 6), and after 40 seconds, the convection fan 3 is operated to operate the state for 2 minutes. It will continue for 20 seconds.

Then, after the time chart of FIG. 4 is finished, control is later determined by what area the room temperature is.

Specifically, in the case where the indoor temperature is less than the area j, the operation returns to normal operation, whereas in the case of the area j, the control shown in the above-described time chart of FIG. 4 is repeated.

In the case where the room temperature is the area k, as shown in the time chart of FIG. 5, the operation code is zero and the convection fan 3 is operated at 10 speeds for 1 minute and then stopped.

Then, 8 minutes after the operation code becomes 0, the operation code is forced to 1, and after 40 seconds, the convection fan 3 is operated to continue the state for 2 minutes and 20 seconds.

In addition, even if the operation is performed four times continuously, if the room temperature is in the region k, the operation code is set to zero until the region j is entered and the convection fan 3 is operated at 10 speeds for one minute. It will turn off for 40 minutes and on for 3 minutes and 20 seconds.

In addition, when the floor heating switch 73 is turned on when the operation code becomes 0 as described above during the heating operation, the control circuit 7 has the operation code 0 (gas burner) as shown in the time chart of FIG. (6) is operated according to the operating state of the floor heater 52) and at the same time the convection fan 3 is operated at 9 speeds (breeze) for 1 minute and then stopped. Then, for example, four minutes after the operation code becomes zero, the convection fan 3 is operated at nine speeds for four minutes.

In addition, when the indoor temperature is maintained in the region j after the end of the time chart of FIG. 6, the convection fan 3 is subjected to nine speeds until the room temperature leaves the region j as shown in the time chart of FIG. 4 minutes on and 4 minutes off are repeated.

If the room temperature is maintained within the area k after the end of the time chart of FIG. 6, the convection fan 3 is subjected to nine speeds until the room temperature leaves the area k as shown in the time chart of FIG. 10 minutes off and 4 minutes on. When the indoor temperature is a region smaller than the region j, the normal operation is returned.

TABLE 1

Further, the control circuit 7 lowers the operation code by one rank when the area of the indoor temperature is shifted in the upward direction, while increasing the operation code by one rank when the area of the indoor temperature is shifted in the downward direction (proportional control). ). If the room temperature is maintained within the timer time shown in Table 2 in the same area, the operation code is changed as shown in Table 2 (integral control). The timer may be freely changed when the air conditioner 1 is provided.

TABLE 2

9 is a flowchart showing the control of the convection fan 3 at the start of heating operation by the control circuit 7.

First, it is judged whether or not the heating operation 72b in the mode switching switch 72 is turned on first (step S1). If the determination result of step S1 is no, the control of step S1 is performed. If the determination result of step S1 is YES, the room temperature Ti and the set temperature Ts are read and the room temperature is read. The area (see FIG. 3) is determined from the temperature difference between the set temperature and the set temperature (step S3). The initial operation code (see Table 1) is set based on the determined area, and the initial operation code is set. It turns on to fan speed (1 speed-8 speed) according to (step S5).

Then, it is determined whether or not the predetermined time has elapsed (step S6).

If the determination result of step S6 is "no", then control of step S6 is performed, while if the determination result of step S6 is "yes", it transfers to heating operation control (step S7).

10 is a flowchart showing the control of the convection fan 3 during the heating operation control by the control circuit 7.

First, it is judged whether or not the heating operation 72b in the changeover switch 72 is turned off (step S11).

If the determination result of step S11 is YES, then control of step S1 is performed. If the determination result of step S11 is NO, the indoor temperature Ti and the set temperature Ts are read (step S12). ), The proportional control routine or the integral control routine is executed from the temperature difference between the room temperature and the set temperature (step S13), and the operation code (see Table 1 and Table 2) determined by the proportional control routine or the integral control routine is set. (Step S14).

Then, it is judged whether or not the operation code is set to 0 (step S15).

If the result of the determination in step S15 is NO, then control of step S11 is performed. If the result of the determination in step S15 is YES, it is determined whether the floor heating switch 73 is turned on (step S15). S16).

If the result of the determination in step S16 is no, the first operation control routine (see time charts in FIGS. 4 and 5) during the warm air alone operation only for indoor heating is performed (step S17). Control is performed.

In addition, when the determination result of step S16 is YES, after performing the 2nd operation control routine (refer to the time chart of FIG. 6, FIG. 7, and FIG. 8) at the same time of indoor heating and floor heating ( Step S18) and control of step S11 are performed.

Next, the operation | movement at the time of the heating operation of the said air conditioning apparatus 1 is demonstrated based on FIG.

When the heating operation 72b is turned on by the mode changeover switch 72, the circulation pump 54 is turned on to generate purified water of hot water in the hot water circuit 5. Then, the combustion fan 62, the solenoid valve 63, and the proportional valve 64 are turned on. Then, fuel gas is supplied to the gas burner 6 through the gas supply path 61, and combustion air is also supplied to the gas burner by the rotation of the combustion fan 62.

At this time, when ignition is performed by an ignition device (not shown), combustion is started in the gas burner 6. For this reason, hot water flowing in the outdoor heat exchanger 53 is heated by the combustion heat generated by the gas burner 6 by combustion. The heated hot water is supplied to the indoor heat exchanger 51 or the floor heater 52 by the delivery pressure of the circulation pump 54.

[First run]

When the floor heating switch 73 is turned off, the solenoid valve 55 is also turned off, so the bypass pipe 57 is closed and switched to the first hot water supply path as indicated by the solid line in FIG. Therefore, hot water heated by the outdoor heat exchanger 53 is supplied only to the indoor heat exchanger 51.

On the other hand, the convection fan 3 determines an area (see FIG. 3) from the temperature difference between the room temperature detected by the room temperature sensor 74 and the set temperature set by the room temperature setter 75 and based on the determined area. According to the initial operation code (refer to Table 1), it is turned on by the fan speed (speed 1-8) (control at the start of heating operation).

For this reason, the indoor air blown by the convection fan 3 is heated in the indoor heat exchanger 51 so that only warm air heating is performed by the discharge rim from the blowout port 22.

Here, when the timer time shown in Table 2 elapses while the room temperature rises above the set temperature, that is, the area is within (j, k), the operation code is set to zero by proportional control and integral control.

At this time, the room temperature rises above the set temperature, as shown in the time chart of FIG. 4 for the purpose of indicating that the detected value of the room temperature sensor 74 installed near the room heat exchanger 51 indicates a temperature close to room temperature. The fan speed (wind volume) of the convection fan 3 is switched from 8 speeds to 10 speeds, for example. Then, 1 minute after the operation code is set to 0, the convection fan 3 is turned off.

Then, 3 minutes after the operation code is set to 1, the area (see FIG. 3) is determined from the temperature difference between the room temperature and the set temperature set by the room temperature setter 75, and the determined area is less than (j). Next, control at the start of heating operation is performed.

In the case where the determined area is (k), since the room temperature is still significantly higher than the set temperature, the operation code is forcibly set to 0 as shown in the time chart of FIG. The fan speed is switched from 8 speed to 10 speed, for example, and the convection fan 3 is turned on one minute after the operation code is set to zero.

Then, 8 minutes after the operation code is set to 0, the operation code is forcibly set to 1, and 40 seconds after the operation code is set to 1, the fan speed of the convection fan 3 is set to 8 speeds, for example. Will be turned on.

Therefore, the excessive rise of the temperature of the indoor heat exchanger 51 during the heating operation can be prevented by repeating the above first operation until the region enters (j).

[Second operation]

On the contrary, when the floor heating switch 73 is turned on, the solenoid valve 55 is also turned on so that the bypass pipe 57 is opened and switched to the second hot water supply path as shown by the broken line in FIG. . For this reason, the hot water heated by the outdoor heat exchanger 53 is supplied to the indoor heat exchanger 51 and the floor heater 52.

Here, when the timer time shown in Table 2 has elapsed while the indoor temperature rises above the set temperature, that is, the area is maintained within (j, k), the operation code is set to zero by proportional control and integral control.

At this time, as shown in the time chart of FIG. 6, the fan speed (air volume) of the convection fan 3 is switched from 8 speeds to 9 speeds, for example. Then, 1 minute after the operation code is set to 0, the convection fan 3 is turned off.

Then, 4 minutes after the operation code is set to 0, the fan speed of the convection fan 3 is turned on at 9 speeds, for example.

Then, 8 minutes after the operation code is set to 0, an area (see FIG. 3) is determined from the temperature difference between the room temperature and the set temperature set by the room temperature setter 75, and the determined area is less than (i). Next, control at the start of heating operation is performed.

In the case where the determined region is (j), since the room temperature is still higher than the set temperature, the convection fan 3 is turned off 4 minutes after turning off the convection fan 3 as shown in the time chart of FIG. Will turn the fan speed to 9 speed.

Therefore, the excessive rise of the temperature of the indoor heat exchanger 51 at the time of heating operation can be prevented by repeating the second operation until it leaves the area j.

As described above, in the air conditioner 1 of the present embodiment, when the floor heating switch 73 is turned on, the first temperature time of the convection fan 3 when the floor heating switch 73 is turned off (this In the embodiment, the second operation is repeated by repeating the second operation of turning on / off the convection fan 3 for a second on time longer than 3 minutes and 20 seconds (on in this embodiment, for 4 minutes). It is possible to accurately detect the detected value of the room temperature sensor 74 because it is possible to suppress the rise of the temperature of the temperature of the indoor heat exchanger 51 even when the gas burner 6 is burning to supply hot water to the floor heater 52 in the middle. Will be.

In the present embodiment, in the air conditioner 1, the convection fan 3 at the first operation is lower than the fan speed (10 speed in this embodiment) at the fan speed of the convection fan 3 at the second operation. In this embodiment, by increasing the speed 9, the room temperature sensor 74 provided near the indoor heat exchanger 51 can bring the ambient temperature closer to the room temperature, thereby increasing the reliability of the detected value of the room temperature. In addition, by increasing the off time of the convection fan 3 of the second time than the first off time of the convection fan 3 of the first operation, an increase in the room temperature can be suppressed during simultaneous operation of the warm air heating and the floor heating. Can be.

[Modification]

In this embodiment, the hot water is heated by the heat of combustion of the gas burner 6, but the hot water may be heated by the heat of combustion of the burner which burns the liquid fuel and the heat of the electric heater, and the operation of the internal combustion engine using the cooling water of the internal combustion engine. You may heat hot water by the heat which generate | occur | produces.

In addition, the present invention provides a floor heater when hot water is supplied to both sides of the indoor heat exchanger and the floor heater by extending the second temperature of the convection fan during the second operation than the first temperature of the convection fan during the first operation. Even if the heating means is operated to supply hot water, the temperature of the indoor heat exchanger can be suppressed from being raised higher than the room temperature. For this reason, since the temperature around the room temperature detection means can be made closer to the room temperature, the reliability of the detected value of the room temperature detection means is increased.

Claims (1)

(a) a blowing casing (2) for blowing air toward the interior, (b) a convection fan (3) for generating an air flow toward the interior in the blowing casing (2), and (c) hot water An indoor heat exchanger (51) for heating room air by heating the air flowing in the blowing casing (2), (d) a floor heater (52) for heating the floor with hot water, and (e) for heating hot water (1) a first hot water supply path for flowing hot water heated by the heating means (6) only to the indoor heat exchanger (51) and hot water heated by the heating means (6). Switching means (55) for switching the second hot water supply passage that flows to both sides of the indoor heat exchanger (51) and the floor heater (52), and (g) an indoor temperature in the vicinity of the indoor heat exchanger (51). And a first detecting means (74) for detecting, when the room temperature detected by the detecting means (74) is higher than a predetermined temperature, the first When switching to the water supply passage, the first operation of turning on and off the heating means 6 and the convection fan 3 is repeated. When switching to the second hot water supply passage, the heating means 6 ) Is operated according to the operation of the floor heater 52, and the on and off of the convection fan 3 is turned on at a second on time longer than the first on time of the convection fan 3 in the first operation. Hot water heating device, characterized in that it comprises a control means (7) for performing a second repeated operation.