JP3425287B2 - Control device for combined 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 heats a room by forming a hot water circulation circuit for circulating hot water heated by one heating source between a floor heating panel and an indoor unit at different temperatures. The present invention relates to a controller for a combined hot water heating system.

[0002]

2. Description of the Related Art Hot water heated by a burner or the like is circulated to an indoor unit, and hot water of different temperature is circulated not only to the indoor unit but also to a floor heating panel installed on the floor of the room. There is a combined hot water heating system with a hot water circulation circuit. In such a combined hot water heating system, in order to control the heating capacity of the indoor unit, the necessary amount of heat to be dissipated in the indoor unit is calculated based on the temperature difference between the set temperature and the indoor temperature, and the indoor unit performs heating operation alone. in case of,
In the case of combined operation in which the combustion amount of a burner or the like that heats hot water is controlled according to the required heat amount and the heat is released in the indoor unit, while heating operation by the floor heating panel is performed simultaneously with the operation of the indoor unit. , The heating amount of the heating source is adjusted so that the temperature of the hot water heated by the heating source such as a burner becomes a constant temperature, and the flow rate of the hot water passing through the indoor unit is controlled according to the required heat amount. The required amount of heat is released.

On the other hand, in order to adjust the heating capacity of the floor heating panel, the floor heating control valve provided in the hot water circulation circuit to the floor heating panel is circulated by varying the open rate according to the set heating capacity. The hot water flow rate is adjusted to control the floor temperature. Here, the temperature of hot water supplied to the floor heating panel is set lower than the temperature of hot water supplied to the indoor unit. As described above, in the combined hot water heating system that circulates hot water to the indoor unit and the floor heating panel, respectively, in order to perform stable heating in a steady state during the combined operation of operating the floor heating panel and the indoor unit at the same time,
The heat radiation amounts of the indoor unit and floor heating panel and the capacity of the burner as a heating source are designed respectively. Specifically, even for appliances that can perform combined heating, there are cases where both the indoor unit and the floor heating panel are installed, and there are cases where only the indoor unit is installed.At this time, the outdoor unit is installed according to the respective installation conditions. If it is attempted to change the capacity of the heating source provided, the manufacturing cost and the man-hours for management increase, so a common outdoor unit is generally used. The maximum capacity of the heating source of the outdoor unit may be the capacity that adds the maximum required amount of heat in the floor heating panel and the maximum required amount of heat in the indoor unit, but if such an ability is designed, the heating source becomes larger. Not only does it require a large installation space, but also the manufacturing cost rises, which imposes a heavy burden on the user who installs only the indoor unit as described above. Therefore, the maximum capacity of the heating source is set to the capacity capable of performing stable heating in a steady state (state after rising) during combined operation.

[0004]

However, when the indoor unit and the floor heating panel are required to have the maximum heating capacities at the beginning of the heating operation in which the room temperature is low, the hot water supply flow rate to the floor heating panel is reduced. Since the open rate of the floor heating control valve to be adjusted is large and the open state of the floor heating control valve is continuous, the hot water supply flow rate to the floor heating panel is increased. At this time, the opening of the variable flow valve that adjusts the flow rate of hot water to the indoor unit is large, but since the supply amount of hot water to the floor heating panel is large, the flow rate of hot water that is actually supplied to the indoor unit is large. Can not do it. Moreover, since the amount of heat radiation from the floor heating panel is large, the temperature of the hot water supplied to the indoor unit cannot be raised to a predetermined high temperature. For this reason,
There is a problem that the indoor air is not sufficiently heated by the indoor unit and it takes time to raise the room temperature.

In order to avoid such a situation, when the heating operation is started only by the indoor unit without supplying hot water to the floor heating panel, a large amount of high-temperature hot water is supplied to the indoor unit so that the heating capacity of the indoor unit is high. Can be fully exerted,
Since the floor heating panel is not operated at all, there is still room for the heating capacity of the burner of the heating source (ability to perform stable heating in a steady state during combined operation), and the entire heating system However, it is not possible to maximize the heating capacity, and as a result, the room temperature cannot be raised quickly despite the heating capacity.

The present invention is a combined hot water heating system provided with a hot water circulation circuit for supplying hot water heated by one heating source to an indoor unit and a floor heating panel at different temperatures. The purpose is to quickly raise.

[0007]

According to a first aspect of the present invention, there is provided a floor heating panel and an indoor heater, each of which uses hot water as a heat source for heating the room, and a heat exchange for heating including a heating source. A hot water circulation circuit is formed so as to supply hot water heated by a heater to the indoor heater and the floor heating panel, and the hot water circulation circuit has a variable flow rate for adjusting the flow rate of hot water supplied to the indoor heater. In a control device of a combined hot water heating system in which a valve is provided and a pump circulates hot water in the hot water circulation circuit, a room temperature setting device for setting a target temperature in the room, and a room temperature sensor for detecting the room temperature in the room. A high temperature water temperature sensor for detecting the temperature of the hot water heated by the heating heat exchanger, and a heating amount of the heating source so that the temperature detected by the high temperature water temperature sensor becomes a constant temperature. Heating source control means for controlling, an outflow hot water temperature sensor for detecting an outflow hot water temperature passing through the indoor heater, at least the preset temperature of the room temperature setting device, and the indoor temperature and the outflow hot water detected by the room temperature sensor A flow rate variable valve control means for controlling the flow rate variable valve based on the outflow hot water temperature of a temperature sensor, a hot water supply control mechanism for controlling a hot water supply amount to the floor heating panel, the indoor heater and the floor heating. A technical means is provided with hot water supply flow rate limiting means for limiting the hot water supply flow rate to the floor heating panel by the hot water supply control mechanism at the initial stage of the combined operation of supplying hot water to the panels together.

With the above configuration, the hot water supply flow rate to the floor heating panel is limited by the hot water supply control mechanism at the beginning of the combined operation in which hot water is supplied to both the indoor heater and the floor heating panel. As a result, the amount of heat supplied to the floor heating panel in the amount of heat of the hot water heated by the heating source is reduced, and the amount of heat supplied to the indoor heater effective to raise the room temperature is secured. Therefore, a large amount of hot water heated to a constant temperature by the heating source can be supplied to the indoor heater, and the indoor heater can release a sufficient amount of heat. At this time, since the hot water is supplied to the floor heating panel even though its flow rate is limited, the floor surface temperature can be raised by the supplied hot water and the floor heating panel can also heat the room. You can

Since the heating capacity of the heating source supplies heat to the floor heating panel in addition to the required amount of heat of the indoor heater, compared to the case where only the indoor heater is operated for heating. Therefore, a large amount of heat is generated, and the heating capacity of the heating source can be fully exerted. Therefore, the heating capacity of the heating source can be fully utilized to heat the room air by the room heater and the floor heating panel to quickly raise the room temperature.

According to a second aspect of the present invention, in the first aspect, the hot water supply control mechanism limits the flow rate of the first open / close valve and the second open / close valve provided in the hot water supply circuit to the floor heating panel. And a bypass pipe provided in a hot water supply circuit to the floor heating panel so as to bypass the first opening / closing valve, and the hot water supply flow rate limiting means is provided with the first pipe at the initial stage of the combined operation. The technical means is to close the on-off valve to limit the hot water supply flow rate.

According to a third aspect of the present invention, in the first aspect, the hot water supply control mechanism is a flow rate control valve, and the hot water supply flow rate limiting means limits the opening degree of the flow rate control valve at the initial stage of the combined operation to supply hot water. Limiting the flow rate is a technical means.

[0012] In claim 4, in claims 1 to 3,
The flow rate variable valve control means calculates the necessary heat quantity to be released by the indoor heater based on the temperature difference between the set temperature and the room temperature, and the necessary heat quantity calculation means. Flow rate calculating means for calculating a flow rate to be adjusted by the flow rate variable valve from the required heat quantity and the outflow hot water temperature of the indoor heater detected by the outflow hot water temperature sensor, the outflow hot water temperature of the indoor heater and the Flow rate-outflow temperature characteristic storage based on flow rate-outflow temperature characteristic storage means that stores in advance a plurality of relative relationship characteristics for each indoor temperature with respect to the flow rate of hot water passing through the indoor heater Outflow temperature determining means for determining the outflow warm water temperature based on the relative relationship characteristic of the means, and based on the outflow warm water temperature determined by the outflow temperature determining means. The technical means that controls driving the variable flow rate valve.

With the above structure, according to the present invention, the necessary heat quantity to be radiated by the indoor unit is calculated according to the set temperature and the indoor temperature, and the calculated necessary heat quantity and the detected hot water temperature of the indoor heater are detected. From this, the flow rate to be adjusted by the flow rate variable valve is calculated. Further, the outflow hot water temperature corresponding to the calculated flow rate is obtained based on the relative relationship characteristic between the outflow hot water temperature of the indoor heater and the hot water flow rate passing through the indoor heater at the room temperature at that time. The variable flow rate valve is controlled to adjust the hot water flow rate to the temperature.

Since the amount of heat radiated by the indoor heater is determined by the temperature and flow rate of the hot water lowered in the indoor heater, the amount of heat corresponding to the required amount of heat is radiated by the indoor heater by the above control. Therefore, an appropriate amount of heat according to the indoor temperature is surely radiated by the indoor heater, and accurate heating can be performed. Further, if the temperature of the hot water heated by the heating source is detected by the temperature sensor, it is possible to reliably manage the heat radiation amount in the indoor heater by the above control, so there is no need to provide a flow sensor to detect the flow rate of the hot water to the indoor heater. Even with this, accurate heating can be performed.

According to a fifth aspect, in the first to third aspects,
The flow rate variable valve control means calculates the necessary heat quantity to be released by the indoor heater based on the temperature difference between the set temperature and the room temperature, and the necessary heat quantity calculation means. Flow rate calculating means for calculating a flow rate to be adjusted by the flow rate variable valve from the required heat amount and the outflow hot water temperature of the indoor heating device detected by the outflow hot water temperature sensor, and the hot water flow rate passing through the indoor heating device is detected. The technical means is to drive and control the flow rate variable valve based on the calculated flow rate calculated by the flow rate calculation means.

With the above construction, according to the third aspect, the necessary heat quantity to be radiated by the indoor unit is calculated according to the set temperature and the indoor temperature, and the heat quantity released by the indoor heater is lower than the hot water by the indoor heater. Since it is determined from the calculated temperature and its flow rate, the flow rate variable valve calculates the flow rate from the calculated required heat quantity and the detected hot water temperature of the indoor heater,
The flow rate variable valve is drive-controlled based on this calculated flow rate,
The hot water flow rate is adjusted. Therefore, if the temperature of the hot water heated by the heating source is detected, an appropriate amount of heat according to the indoor temperature is surely radiated by the indoor heater, and accurate heating can be performed. Moreover, since the amount of heat radiation in the indoor heater can be reliably managed by the above control, accurate heating can be performed.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Next, the present invention will be described based on the following examples. FIG. 1 shows an embodiment of a hot water heating type air conditioner system according to the present invention. In FIG. 1, 1
Is an outdoor unit that has a heating source and a cooling source and is installed outdoors, 2
Is an indoor unit (maximum heat dissipation 30
00 kcal), which is connected to the outdoor unit 1 through a hot water pipe and a cooling pipe, and 3 is a floor heating panel (maximum heat radiation 1
500 kcal) and is connected to the outdoor unit 1 by a hot water pipe. The outdoor unit 1, the indoor unit 2, the floor heating panel 3, the hot water pipe, and the cooling pipe make the hot water circuit 1 for heating.
0 and the refrigeration cycle 20 are formed respectively.

In the outdoor unit 1, as a structure of the hot water circuit 10, a heating heat exchanger 11, a circulation pump 12 driven at a constant rotation, a floor warm / hot water supply control mechanism 13, and a needle are driven by a stepping motor to flow. Flow rate control valve 1
4. The pressure tank 15 is provided and the gas burner 100 as a heating source is provided. Refrigeration cycle 2
The configuration of 0 is a compressor 2 that is driven by a motor controlled by an inverter and compresses Freon gas that is a refrigerant.
1, a condenser 22, a strainer 23, and a capillary tube 24 are provided, and the condenser 22 is provided with a heat radiation fan 26.

The floor warm / hot water supply control mechanism 13 is shown in FIG.
As shown in, the first thermal valve 13 that is the first on-off valve provided in the floor heating hot water circuit 10a directed to the floor heating panel 3.
a, a bypass 10b connected in parallel to the floor heating hot water circuit 10a so as to bypass the thermal valve 13a, and a second thermal valve 1 which is a second opening / closing valve provided in the bypass 10b.
3b and an orifice 13c that limits the flow rate. Here, each of the thermal valves 13a and 13b controls opening and closing by the heat of an electric heater or the like, and although opening and closing takes time, when the circulation of hot water is stopped, the hot water circulation circuit is reliably operated by a large operating force. It can be closed. The first and second on-off valves may be electromagnetic valves and motor valves.

The indoor unit 2 is provided with a heating heat exchanger 16 as a component of the hot water circuit 10, and a cooling heat exchanger 25 as a component of the refrigeration cycle 20.
Convection fan 2 that circulates indoor air for 6, 25
00 is provided to cool the indoor air to the heat exchanger 25 for cooling.
→ Pass through the heat exchanger 16 for heating in this order, and send it out to the room again.

In the outdoor unit 1, the indoor unit 2 and the floor heating panel 3, in the hot water circuit 10, the discharge side of the circulation pump 12 is connected to the inflow side of the heating heat exchanger 11, and the outflow side of the heating heat exchanger 11 is connected. Is connected to the inflow side of the heating heat exchanger 16 of the indoor unit 2 via the variable flow rate valve 14. The hot water pipe is branched between the inflow side of the heating heat exchanger 11 and the discharge side of the circulation pump 12, and the branched hot water pipe is connected to the inflow side of the floor heating panel 3 via the floor warm / hot water supply control mechanism 13. It is connected. The hot water pipe on the outflow side of the heating heat exchanger 16 and the hot water pipe on the outflow side of the floor heating panel 3 join together and are connected to the suction side of the circulation pump 12 via the pressure tank 15.

The hot water pipe branches off on the outflow side of the heating heat exchanger 11, bypasses the indoor unit 2 and the floor heating panel 3, and a small amount of hot water flows from the heating heat exchanger 11 to the circulation pump 12. It is a bypass pipe 17 for direct return, and the outflow side of the bypass pipe 17 is connected to the suction side of the circulation pump 12 and joins with the outflow side of the pressure tank 15.

In the hot water circuit 10 having the above structure, the circulation pump 12 is mainly operated to operate mainly.
In the circulation circuit of the heat exchanger 11 for heating → the variable flow valve 14 → the heat exchanger 16 for heating → the pressure tank 15 → the circulation pump 12, the high temperature water in the heat exchanger 11 for heating heated to high temperature by the burner 100 A circulation pump 12 → floor warm and hot water supply control mechanism 13 → floor heating panel 3 → pressure tank 15 → is formed while forming a circulating circuit for high temperature water.
The circulation circuit of the circulation pump 12 forms a low temperature water circulation circuit for circulating the low temperature water returned to the circulation pump 12.

The burner 100 (maximum heat capacity of 4000 k
The high-temperature water in the heating heat exchanger 11 heated by cal) circulates in the circulation circuit of the circulation pump 12 → the heating heat exchanger 11 → the bypass pipe 17 → the circulation pump 12 and circulates to the floor heating panel 3. Heat the hot water in the low-temperature water circulation circuit.

On the other hand, in the refrigeration cycle 20, the CFC refrigerant circulates through the refrigerant compressor 21 → condenser 22 → strainer 23 → capillary tube 24 → cooling heat exchanger 25 → refrigerant compressor 21, and the refrigerant is circulated during the circulation. Is in the vapor phase in the condenser 22 →
The state of the liquid phase is changed to release heat, and the heat exchanger 25 for cooling changes the state of the liquid phase (fog) to the vapor phase to absorb heat and cool the indoor air.

The control device 400 controls various operations by a microcomputer according to the remote controller 4 operated by the user. The main unit 401 is provided in the outdoor unit 1, but the indoor unit 2 is A receiving unit for receiving an infrared operation signal of the remote controller 4, a detecting unit for detecting various sensors provided in the indoor unit 2, a driving unit for driving the convection fan 200, and these indoor units 2 A communication unit that communicates control signals between each unit and the main unit of the outdoor unit 1 is provided.

Further, in the main part, the operation of the compressor 21 of the refrigeration cycle 20 in the cooling operation and the dehumidifying operation is performed separately from the microcomputer for the main operation including the heating operation such as the combustion control of the burner 100 using gas as fuel. A cooling microcomputer for controlling is separately provided.

In addition, the control device 400 is provided between the hot water thermistor 401 on the outflow side of the heating heat exchanger 11, the discharge side of the circulation pump 12 and the floor warm / hot water supply control mechanism 13 in order to perform various controls. Low temperature water thermistor 402, indoor unit 2
The indoor hot water thermistor 4 is provided on the outflow side of the heating heat exchanger 16 of
03, indoor freezing thermistor 40 in heat exchanger 25 for cooling
4. The room temperature thermistor 405 and the humidity sensor 406 are provided in the indoor unit 2.

In the hot water heating type air conditioner system having the above structure, the controller 400 controls the single heating operation by the indoor unit 2 only, the floor single operation by the floor heating panel 3 only, and the duet heating by the floor heating panel 3 and the indoor unit 2. The operation, the dry operation using only the indoor unit 2, the duet dry operation using the floor heating panel 3 and the indoor unit 2, and the cooling operation using the indoor unit 2 are controlled. Here, the independent heating operation using only the indoor unit 2, the floor independent operation using only the floor heating panel 3, and the duet heating operation using the floor heating panel 3 and the indoor unit 2 will be described below.

[Independent Heating Operation] In the independent heating operation, the room is heated only by the indoor unit 2. In the independent heating operation, the circulation pump 12 is started in response to the ON operation of the heating operation of the remote controller 4, the combustion of the burner 100 is started, and the flow rate variable valve 14 is fully opened to make the remote controller 4 operate.
The target hot water temperature is set between 58 ° C. and 85 ° C. based on the target indoor temperature Ts set by the room temperature Tr and the indoor temperature Tr detected by the room temperature thermistor 405.
The combustion amount of the burner 100 is controlled so that the hot water temperature detected by 1 becomes the target hot water temperature. Further, the convection fan 200 of the indoor unit 2 is controlled in eight stages in proportion to the combustion amount of the burner 100. At this time, the thermal valves 13a and 13b of the floor warm / hot water supply control mechanism 13 of the low temperature water circulation circuit are closed.

[Floor alone operation] In the floor alone operation, heating operation is performed only by the floor heating panel 3. In the floor alone operation, the floor heating hot dash operation is performed according to the ON operation of the floor heating operation of the remote controller 4. Hereinafter, description will be made with reference to FIG. In the floor heating hot dash operation, first, the convection fan 200 of the indoor unit 2 is driven for a fixed time (several tens of seconds) by a slight breeze (step 101), thereby convection the indoor air. Then, the room temperature Tr is detected by the room temperature thermistor 405 provided in the indoor unit 2 (step 1
02).

The floor temperature is estimated by this detection, and each thermal valve 13 of the floor warm / hot water supply control mechanism 13 is estimated based on the temperature.
A floor heating hot dash time tp (20 minutes to 3 hours) for continuously opening a and 13b is calculated (step 10).
3). The floor heating hot dash time tp is calculated to be short when the detected room temperature Tr is high and to be long as the detected room temperature Tr is low.

In the floor heating hot dash operation, the drive of the circulation pump 12 is started and the combustion of the burner 100 is started. During the floor heating hot dash time tp, the thermal valves 13a and 13b are opened, and the combustion fan 101 and the proportional valve 104 are controlled so that the temperature detected by the high temperature water thermistor 401 becomes 80 ° C (step 10).
4). As a result, the hot water heated to 80 ° C. by the burner 100 continuously passes through the floor heating panel 3 for the floor heating hot dash time tp immediately after the start of operation and radiates heat. Ability can be secured,
The indoor temperature rise is improved.

After the floor heating hot dash time tp elapses (YES in step 105), the opening time and the cutoff of the first thermal valve 13a are shut off according to the floor heating level set by the remote controller 4 out of seven stages. The ratio with respect to time is determined, and the first thermal valve 13a is controlled to open / close at the determined ratio (step 106). At this time, the second thermal valve 13b is closed. Also, the combustion amount of the burner 100 is
The temperature detected by the low temperature water thermistor 402 is 60.
It is controlled so that it becomes ℃.

The ratio of the opening time to the shut-off time of the first thermal valve 13a is such that the opening time in a cycle of 20 minutes is 20 minutes at the maximum floor heating level, 3 minutes at the minimum floor heating level, and in that period. Underfloor heating level from 3 minutes to 2
The time between 0 minutes is set respectively. In the case of the floor heating alone operation, the variable flow valve 14 is closed.

[Duet heating operation (combined heating operation)]
In the duet heating operation, the indoor unit 2 and the floor heating panel 3 heat the room. In the duet heating operation, when the floor heating panel 3 is subjected to the floor heating hot dash operation in the case of the floor independent operation described above, the flow rate of hot water supplied to the heating heat exchanger 16 effective for raising the room temperature is increased. Figure 4
As shown in, the floor warm / hot water supply control mechanism 13 limits the hot water flow rate to the floor heating panel 3 as follows.

When the duet heating operation is instructed by the remote controller 4, the first thermal valve 13a is closed and the second thermal valve 1 is closed.
Only 3b is opened (the upper limit of the heat radiation amount in the floor heating panel 3 at this time is 1000 kcal) (step 111), the circulation pump 12 is operated, and the combustion of the gas burner 100 is started (step 112). Until a predetermined time (for example, 20 to 30 minutes) elapses (step 1
(NO in 13), and the supply of hot water to the heating heat exchanger 16 is prioritized. When a predetermined time has elapsed after the start of operation (YES in step 113), the second thermal valve 13b
Is closed (step 114), and thereafter the first thermal valve 13a is closed.
Opening / closing control is performed by (at this time, the maximum heat radiation amount can be output) (step 115). In this way, the amount of hot water supplied to the floor heating panel 3 (which is not very effective for raising the room temperature) is reduced, and the amount of hot water supplied to the indoor unit 2 is increased accordingly. Therefore, the heat radiation amount of the heating heat exchanger 16 is set to the maximum heat radiation amount (3000 kcal).
Can be output, and the rise of room temperature can be accelerated in the early stage of operation.

To control the combustion amount after the burner 100 is ignited, the high temperature water thermistor 401 provided on the outflow side of the heating heat exchanger 11 detects the high temperature water temperature, and normally the temperature is raised to 80 ° C. The combustion amount of the burner 100 is feedback-controlled so that

However, in the control of the hot water flow rate L to the heating heat exchanger 16 by the variable flow rate valve 14 described below,
When the flow rate is limited and the heat radiation amount in the heating heat exchanger 16 is reduced, the floor heating panel 3 is bypassed via the bypass 17.
In order to prevent the flow rate of the hot water supplied to the floor heating panel 3 from increasing and the temperature of the hot water supplied to the floor heating panel 3 from becoming too high, the following control is performed as shown in FIG.

That is, in controlling the gas burner 100,
Normally, based on the temperature detected by the high temperature water thermistor 401,
The blower 101 and the proportional valve 104 are controlled so that the detected temperature becomes 80 ° C. (step 201), and the control of this step 201 is such that the hot water temperature of the low temperature water circulation circuit detected by the low temperature water thermistor 402 is 60 ° C. or lower. In the case of, it continues (NO in step 202).

However, if the hot water temperature of the low temperature water circulation circuit detected by the low temperature water thermistor 402 exceeds 60 ° C. (eg, in step 202, when the heating load is lowered due to a change in the set temperature or a change in the outside air temperature). YES), the combustion amount of the gas burner 100 is limited so that the temperature detected by the low temperature water thermistor 402 becomes 60 ° C., and the blower 101 and the proportional valve 104 are controlled (step 20).
3).

The control in step 203 is continued until, for example, the next change in the set temperature occurs (step 2
(NO in 04), if the set temperature is changed (YES in step 204), step 2 is executed again.
01, the temperature control of 80 ° C. is performed by the detection of the normal high temperature water thermistor 401.

As the hot water control for the indoor unit 2, the necessary heat quantity Q to be released into the room is calculated based on the set temperature Ts of the remote controller 4 and the indoor temperature Tr detected by the room temperature thermistor 405 provided in the indoor unit 2. Then, the flow rate variable valve 14 is controlled so that the hot water flow rate L such that the required heat quantity Q is radiated by the heating heat exchanger 16 of the indoor unit 2 is obtained.

The amount of heat radiated in the heating heat exchanger 16 depends on the temperature difference between the inflow hot water temperature Tin flowing into the heating heat exchanger 16 and the outflow hot water temperature Tout flowing out from the heating heat exchanger 16, and From the hot water flow rate L flowing through the heat exchanger 16, Q = L * (Tin-Tout) ... Equation 1 is obtained. Therefore, the hot water flow rate L is determined by L = Q / (Tin-Tout) ... Equation 2. Therefore, when the required heat quantity Q is calculated, if the inflow warm water temperature Tin and the outflow warm water temperature Tout are detected, the warm water flow rate L can be calculated by the above equation 2, and the calculated warm water flow rate L can be obtained. The variable flow valve 14 may be controlled.

However, in this embodiment, since the flow rate sensor for detecting the flow rate circulating through the heating heat exchanger 16 of the indoor unit 2 is not provided, the flow rate variable valve based on the flow rate calculated by the above equation (2). I can't control 14. Therefore, in practice, the variable flow valve 14 is controlled as follows.

Hot water temperature Tin flowing into the heat exchanger 16 for heating
Is constant, for example, if the indoor temperature Tr1 is the same, the outflow hot water temperature Tout1 is expressed as Tout1 = F1 (L) ... Equation 3 as a function F1 that changes according to the hot water flow rate L. Similarly, for different indoor temperatures Trn, Toutn = Fn (L) ...

Therefore, when the inflow hot water temperature Tin to the heating heat exchanger 16 is constant, the hot water flow rate L at a certain room temperature Tr is expressed as an inverse function of the outflow hot water temperature Tout n. That is, if the indoor temperature Tr and the outflow hot water temperature Tout are detected, the hot water flow rate L can be obtained.

In this embodiment, the temperature Tin of the hot water flowing into the heat exchanger 16 for heating is controlled to a constant temperature of 80 ° C.
For each room temperature Tr, the relationship between the outflow hot water temperature Tout and the hot water flow rate L is stored in advance in the storage means in the microcomputer as data, the room temperature Tr is detected, and the outflow hot water at the detected room temperature Tr is detected. The flow rate variable valve 14 is controlled so that the temperature Tout becomes a temperature corresponding to the hot water flow rate L of the above-described equation 2. The hot water temperature Tin flowing into the heating heat exchanger 16 is detected by the high temperature water thermistor 401, and the outflow hot water temperature Tout is detected by the indoor hot water thermistor 403 of the indoor unit 2.

FIG. 6 shows an example of the relationship between the hot water flow rate L and the outflow hot water temperature Tout relating to the detected room temperature Tr as the stored data. As is clear from the figure, when the indoor temperature Tr is specified, the outflow hot water temperature Tout corresponding to the hot water flow rate L is determined, so the flow rate variable valve 14 is set so that the outflow hot water temperature Tout corresponding to the hot water flow rate L is detected. You can see that it should be adjusted.

Although FIG. 6 shows an example of the case where the hot water temperature Tin flowing into the heating heat exchanger 16 is a constant temperature of 80 ° C., in Step 203 of the control of the gas burner 100 described above, the low temperature is set. When controlling the temperature detected by the water thermistor 402 to be 60 ° C.
However, the relationship between the hot water flow rate L and the outflow hot water temperature Tout relating to the detected room temperature Tr shown in FIG. 6 cannot be used as it is.

Therefore, corresponding to the case where the control of step 203 is performed, further, in the case where the hot water temperature Tin flowing into the heating heat exchanger 16 is not 80.degree. It may be provided as data for storing the relationship between L and the outflow warm water temperature Tout. Further, as is clear from FIG. 6, since each stored data has a curved shape in which the respective characteristics are approximate, only the data under some limited conditions are stored and other data are stored. Under a condition, a flow rate value obtained by performing a calculation process based on a characteristic under a certain condition may be used.

By the control operation described above, the flow rate to the heating heat exchanger 16 can be controlled without providing the flow rate sensor, and the heat radiation amount in the heating heat exchanger 16 of the indoor unit 2 can be accurately controlled. Even if the floor heating panel 3 performs heating at the same time and the flow rate to the heating heat exchanger 16 is not stable, more accurate heating operation can be performed.

In each of the above operations, the burner 10
As the combustion control of 0, the pre-purge is performed by the combustion fan 101 according to the ON operation of each operation, and then the solenoid valves 102, 103 and the proportional valve 104 are controlled in a predetermined sequence to supply the fuel to the burner 100. Then, ignition control is performed to generate a spark discharge at the ignition electrode 105 and start combustion.
After detection of ignition by the flame rod 106, the combustion fan 101 and the proportional valve 104 are controlled to control the combustion amount of the burner 100. After the operation is completed, the burner 100
By stopping the operation of the circulation pump 12 two minutes after the combustion is stopped, the heating operation can be smoothly stopped by utilizing the residual heat.

Inverter control for driving the compressor 21 is performed by the compressor 2 during the cooling operation and each dry operation.
The rotational speed of 1 is controlled.

By performing the above control, even when the flow rate of the heating heat exchanger 16 is limited and the hot water temperature of the low temperature water circulation circuit supplied to the floor heating panel 3 rises,
It is possible to stabilize the temperature of hot water supplied to the floor heating pulse 3 and perform stable temperature management. Further, since the heating amount of the gas burner 100 is limited by performing the above control, the flow rate of the heating heat exchanger 16 is not overly limited, and a sufficient flow rate of hot water is supplied to the heating heat exchanger 16. Since it can be supplied, the heat radiation characteristic in the heating heat exchanger 16 is stabilized, and the temperature control is appropriately performed.

FIG. 7 shows a second embodiment of the present invention. In the second embodiment, a flow rate sensor 18 for detecting the flow rate of hot water supplied to the heating heat exchanger 16 is provided in the hot water circuit from the variable flow rate valve 14 to the heating heat exchanger 16.
As a result, the flow rate detected by the flow rate sensor 18 is set to the flow rate calculated by Equation 2 in the above embodiment,
It is only necessary to control the variable flow valve 14. Therefore, the hot water flow rate L and the outflow hot water temperature T related to the detected room temperature Tr
It is not necessary to memorize the relation with out, and highly accurate heat quantity control can be performed.

In the above embodiment, the floor warming valve is shown as the shutoff valve, and the opening ratio is controlled by changing the duty ratio of ON and OFF. However, the flow rate is adjusted by adjusting the opening. A proportional valve (flow rate control valve) that can be used may be used to control the opening ratio by changing the energizing current. In this case, a large amount of hot water heated to a constant temperature is supplied to the indoor heater 2 by limiting the opening of the flow control valve at the initial stage of the combined operation and limiting the flow rate of hot water supplied to the floor heating panel 3. Therefore, the indoor heater can release a sufficient amount of heat. In the above embodiment, the heating capacity is adjusted by controlling the combustion amount of the burner during the heating only operation, but the heating capacity is controlled by keeping the temperature of the hot water constant and controlling the circulation flow rate by the pump. May be adjusted. Although the burner is shown as the heating source in the above embodiment, an electric heater may be used.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a hot water air conditioner system showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram showing a floor warm / hot water supply control mechanism in the hot water circuit according to the embodiment of the present invention.

FIG. 3 is a flow chart for explaining a control operation in a floor single operation according to the embodiment of the present invention.

FIG. 4 is a flow chart for explaining a control operation in a duet heating operation in the example of the present invention.

FIG. 5 is a flowchart for explaining the control operation of the gas burner in the duet heating operation in the embodiment of the present invention.

FIG. 6 is an example of a characteristic diagram showing a relationship between a hot water flow rate at each room temperature and an outflow hot water temperature of a heating heat exchanger for explaining control characteristics of a duet heating operation in an example of the present invention.

FIG. 7 is a schematic configuration diagram of a hot water air conditioner system showing a second embodiment of the present invention.

[Explanation of symbols]

2 Indoor unit (indoor heater) 3 Floor heating panel 4 Remote control (room temperature setting device) 10 Hot water circuit (hot water circulation circuit) 10a Bypass 11 Heating heat exchanger 12 Circulation pump 13 Floor warm / hot water supply control mechanism 13a First heat Valve (first opening / closing valve) 13b Second thermal valve (second opening / closing valve) 13c Orifice 14 Flow rate variable valve 18 Flow rate sensor 100 Burner (heating source) 200 Convection fan (blower) 400 Controller (combined hot water heating system) Control device,
Heating source control means, variable flow valve control means, hot water supply flow rate limiting means, required heat amount calculation means, flow rate calculation means, flow rate vs. outflow temperature characteristic storage means, outflow temperature determination means) 401 High temperature water thermistor (high temperature water temperature sensor) 403 Indoor hot water thermistor (outflow hot water temperature sensor) 405 Room temperature thermistor (room temperature sensor)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-7-103495 (JP, A) JP-A-6-58560 (JP, A) JP-A-63-143432 (JP, A) 6210 (JP, U) Actually open 1-160220 (JP, U) Actually open 62-43212 (JP, U) Actually open 57-36504 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24D 3/00

Claims (5)

(57) [Claims] 1. A floor heating panel and a room heater, each of which uses hot water as a heat source, are provided to heat a room, and the hot water heated by a heating heat exchanger having a heat source is supplied to the room heater and the room heater. A hot water circulation circuit is formed so as to be supplied to the floor heating panel, a variable flow valve for adjusting the flow rate of hot water supplied to the indoor heater is provided in the hot water circulation circuit, and hot water is supplied to the hot water circulation circuit by a pump. In a controller of a combined hot water heating system to circulate, a room temperature setting device for setting a target temperature in the room, a room temperature sensor for detecting an indoor temperature in the room, and hot water heated by the heat exchanger for heating. A high temperature water temperature sensor for detecting a temperature; a heating source control means for controlling a heating amount of the heating source so that a detection temperature of the high temperature water temperature sensor becomes a constant temperature; An outflow hot water temperature sensor for detecting the outflow hot water temperature passing through the heater; and based on at least the preset temperature of the room temperature setting device, the room temperature detected by the room temperature sensor, and the outflow hot water temperature of the outflow hot water temperature sensor. Flow rate variable valve control means for controlling the flow rate variable valve, a hot water supply control mechanism for controlling the amount of hot water supply to the floor heating panel, a combined operation initial stage for supplying hot water to both the indoor heater and the floor heating panel The hot water supply flow rate limiting means for limiting the hot water supply flow rate to the floor heating panel by the hot water supply control mechanism. 2. The hot water supply control mechanism includes a first opening / closing valve provided in a hot water supply circuit for the floor heating panel, a second opening / closing valve, and an orifice for restricting a flow rate. And a bypass pipe provided in a hot water supply circuit to the floor heating panel so as to bypass the valve, and the hot water supply flow rate limiting means closes the first opening / closing valve at the initial stage of the combined operation to control the hot water supply flow rate. The control device for the combined hot water heating system according to claim 1, wherein the control device is limited. 3. The hot water supply control mechanism is a flow rate control valve, and the hot water supply flow rate limiting means limits the opening degree of the flow rate control valve at the initial stage of the composite operation to limit the hot water supply flow rate. The control device for the combined hot water heating system according to claim 1. 4. The required flow rate calculation means for calculating the required heat quantity to be released by the indoor heater based on the temperature difference between the set temperature and the indoor temperature, the flow rate variable valve control means, and the required heat quantity calculation. Flow rate calculating means for calculating a flow rate to be adjusted by the flow rate variable valve from the required heat amount calculated by the means and the outflow hot water temperature of the indoor heater detected by the outflow hot water temperature sensor; Flow rate vs. outflow temperature characteristic storage means that stores in advance a plurality of relative relationship characteristics for each indoor temperature between the outflow hot water temperature and the hot water flow rate that passes through the indoor heater, and the flow rate from the indoor temperature and the flow rate of the flow rate calculation means. Outflow temperature determining means for determining the outflow hot water temperature based on the relative relationship characteristic of the outflow temperature characteristic storage means, and the outflow determined by the outflow temperature determining means. Control device for a composite hot water heating system according to any one of claims 1 to 3, characterized in that the drive control of the variable flow valve based on the water temperature. 5. The necessary flow rate valve control means calculates a required heat quantity to be released by the indoor heater based on a temperature difference between the set temperature and the indoor temperature, and a required heat quantity calculation. Flow rate calculating means for calculating a flow rate to be adjusted by the flow rate variable valve from the required heat amount calculated by the means and the outflow hot water temperature of the indoor heater detected by the outflow hot water temperature sensor; 4. A composite flow sensor according to claim 1, further comprising: a flow rate sensor for detecting the flow rate of hot water, which controls the flow rate variable valve based on the calculated flow rate calculated by the flow rate calculation means. Controller for hot water heating system.