JPH10205784A - Warm water-floor-heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the amount of heat dissipation to a floor surface substantially unchanged even at different fresh air temperature, and improve convenience by setting capability-setting means in the same state. SOLUTION: The present system includes an outdoor machine 1 including a heating heat exchanger 11 heated by a gas burner 100 and installed outside a house, an indoor machine 2 connected with the outdoor machine 1 through warm water pipings 101, 102, a floor heating panel 3 buried under a floor in a room, a first warm water circuit 51 where there are connected annularly the heating heat exchanger 11 and a circulation pump 12, a second warm water circuit 52 where an opening/closing valve 13 is disposed in the course thereof, and a third warm water circuit 53. Hereupon, a control circuit 400 determines (1600 to 3000kcal/h) in the case of mat single operation, an input of the gas burner 100 at each predetermined time is determined such that temperature of warm water detected by a low temperature water thermistor 402 may become set temperature (65 deg.C), and further determines opening/closing time of the opening/closing valve 13 based upon a mat speed number set by a remote controller 4 and fresh air temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water type heating apparatus for heating a floor with hot water.

[0002]

2. Description of the Related Art In a hot water floor heating system, a floor heating panel is usually buried below a floor surface, and heating is performed by supplying hot water heated by a heating means through a pipe. In such a hot water floor heating system, conventionally, in order to adjust the floor heating capacity, the heating amount of the heating means is controlled and set so that the temperature of the hot water supplied to the floor heating panel becomes a predetermined temperature. There is known an apparatus in which a control valve provided in a hot water circulation circuit is operated based on a floor heating amount (set by a user using a capability setting means) to control a heat release amount of a floor heating panel.

[0003]

Since the floor heating panel is buried below the floor, the heat radiated from the panel is radiated to other parts than the floor. For this reason, the amount of heat radiation from the floor heating panel to the floor surface varies depending on the difference in outside temperature.
The amount of heating to the floor is reduced.

Therefore, even if the ability setting means is set in the same state, there is a problem that the degree of warming of the floor surface varies depending on the day and the usability is poor. In addition, a temperature sensor is provided on the floor surface, and the heating amount of the heating source is controlled so that the floor surface temperature detected by the temperature sensor becomes the floor surface temperature corresponding to the heating capacity set by the capacity setting means. However, it is not practical because damages such as breakage of the temperature sensor and disconnection of the signal line occur.

[0005] An object of the present invention is to provide an easy-to-use, hot water type heating apparatus which can make the amount of heat released to the floor substantially constant even when the outside air temperature varies, by keeping the capacity setting means in the same state. It is in.

[0006]

In order to solve the above problems, the present invention employs the following constitution. (1) A hot water floor heating system is a hot water circuit formed by connecting a heat exchanger heated by a heating means, a circulation pump, a control valve, and a floor heating panel buried in the floor in a ring shape, Capacity setting means for setting a heating amount, hot water temperature detecting means for detecting a hot water temperature on the outlet side of the heat exchanger, outside air temperature detecting means for detecting an outside air temperature, and the hot water temperature becomes a predetermined temperature Control means for controlling the heating amount of the heating means as described above, operating the control valve based on the set floor heating amount and the outside air temperature, and controlling the heat radiation amount of the floor heating panel.

(2) The hot-water floor heating system has a first hot-water circuit in which a heat exchanger heated by a heating means and a circulating pump are connected in a ring, a control valve is provided in the middle, and is embedded in the floor. A second hot water circuit in which a hot water inlet side of the floor heating panel is connected to an outlet side of the circulating pump, and a hot water outlet side is connected to an inlet side of the circulating pump; and a capacity setting for a user to set a floor heating amount. Means, a hot water temperature detecting means for detecting a hot water temperature on the outlet side of the circulation pump, an outside air temperature detecting means for detecting an outside air temperature, and controlling a heating amount of the heating means so that the hot water temperature becomes a predetermined temperature. And control means for operating the control valve based on the set floor heating amount and the outside air temperature to control the heat release amount of the floor heating panel.

[0008] (3) The hot-water type floor heating system includes the above (1)
Or the configuration of (2), wherein the control valve is an opening / closing valve that stops circulation of hot water flowing through the hot water circuit or the second hot water circuit by closing the valve, and the control unit is configured to set floor heating. The heat release amount of the floor heating panel is controlled by changing a valve opening time ratio of the on-off valve based on the amount and the detected outside air temperature.

[0009]

[Action and effect of the invention]

(Claims 1 and 3) The heating means heats the heat exchanger,
The heated hot water is circulated in the hot water circuit by a circulation pump. The control means controls the heating amount of the heating means so that the temperature of the hot water at the outlet side of the heat exchanger becomes a predetermined temperature. The control means operates the control valve (or changes the opening time ratio of the on-off valve) based on the floor heating amount set by the user and the outside air temperature detected by the outside air temperature detecting means, thereby controlling the floor heating. Controls the amount of heat released from the panel.

The heating means heats the heat exchanger, and the heated hot water is circulated in the first hot water circuit by the circulation pump. The control means controls the heating amount of the heating means so that the temperature of the hot water on the outflow side of the heat exchanger becomes a predetermined temperature. In addition, a control valve is disposed in the circuit of the circulation pump, the outlet side of the circulation pump, the hot water inlet of the floor heating panel, the floor heating panel, the hot water outlet of the floor heating panel, the inflow side of the circulation pump, and the circulation pump. Hot water circulates through the hot water circuit. The control means operates the control valve (or changes the opening time ratio of the on-off valve) based on the floor heating amount set by the user and the outside air temperature detected by the outside air temperature detecting means, thereby controlling the floor heating. Controls the amount of heat released from the panel.

According to the above-described operations, even if the amount of heat radiation from the floor heating panel to an area other than the floor (for example, below the floor) changes due to a difference in outside air temperature, the amount of heat radiation from the floor heating panel to the floor is kept substantially constant. it can. That is, if the heating capacity set by the capacity setting means is the same, the amount of heat radiation from the floor heating panel to the floor can be made substantially constant regardless of the outside air temperature.

For this reason, even if the outside air temperature is low or high, the degree of warming of the floor surface is substantially the same, so that the setting of the capacity setting means is easy (useful). In addition, the user can intuitively (experience) know which state of the capacity setting means the floor temperature will be at an appropriate temperature (useful).

According to the third aspect of the present invention, an on-off valve for switching between opening and closing is used. Further, in the configuration of the first and second aspects, a type that can continuously change the opening degree can be used.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention (Claims 1 to 3)
Will be described with reference to FIG. FIG. 1 is a configuration diagram of a hot water heating type air conditioning system A. 1 is a gas burner 10
This is an outdoor unit that has a heat exchanger 11 for heating heated by 0 and is installed outdoors. Reference numeral 2 denotes an indoor unit that is disposed indoors, and includes hot water pipes 101 and 102, and a refrigerant pipe 241,
242 is connected to the outdoor unit 1. Reference numeral 3 denotes a floor heating panel having a heat-dissipating hot water pipe 31 and buried on the floor in the room. Reference numeral 4 denotes an infrared remote controller.

Reference numeral 51 denotes a heating heat exchanger 11 → hot water piping 5
11 → bypass pipe 510 → circulation pump 12 (constant rotation speed) → hot water pipe 512 → heating heat exchanger 11 is a first hot water circuit connected in a ring. The first hot water circuit 51
A combination of the second hot water circuit 52 and a second hot water circuit 52 described below corresponds to a hot water circuit of claim 1.

A hot water inlet side 311 of the floor heating panel 3 is connected to an outlet side 121 of the circulation pump 12 via a hot water pipe 521 provided with an on-off valve 13 (control valve) in the middle.
The hot water outlet side 312 of the floor heating panel 3 was connected to the inflow side 122 of the circulation pump 12 via a hot water pipe 522 provided with a pressure tank 15 (for buffering a water pressure change caused by the opening and closing of the on-off valve 13). This is the second hot water circuit.
The hot water flowing in the second hot water circuit 52 is the first hot water circuit 5.
The temperature rises due to the mixing of the high-temperature hot water flowing through 1.

Reference numeral 53 denotes a hot water inlet side 1 of the heat exchanger 16 for heating.
61 is connected to a hot water pipe 511 (outflow side 121 of the circulation pump 12) via a hot water pipe 101 provided with a variable flow rate valve 14, and a hot water outflow side 162 of the heating heat exchanger 16 is connected via a hot water pipe 102. This is a third hot water circuit connected to a substantially middle position of the hot water pipe 522. Reference numeral 20 denotes a refrigeration cycle.
The variable flow rate valve 14 has a structure in which the needle is driven by a stepping motor.

The refrigeration cycle 20 includes a refrigerant (Freon gas)
21 (compressed by inverter) → refrigerant pipe 211 → condenser 22 provided with radiating fan 26 → refrigerant pipe 221 → strainer 23 → capillary tube 2
4 → refrigerant pipe 241 → cooling heat exchanger 25 → refrigerant pipe 2
42 → the compressor 21 is connected in a ring shape. During the circulation, the refrigerant changes the state from the gas phase to the liquid phase in the condenser 22 to release heat, and the heat exchanger 25 for cooling changes the state in the liquid phase (mist) to absorb heat. Do.

The indoor unit 2 is provided with a heat exchanger 16 for heating and a heat exchanger 25 for cooling, and a convection fan 20 for sucking and blowing out (in a hot air or a cold air) indoor air.
0 is provided. The indoor air passes through the cooling heat exchanger 25 → the heating heat exchanger 16 → the convection fan 200 in this order.

The control circuit 400 receives signals from the following sensors for performing each operation. A high-temperature water thermistor 401 (disposed on the outlet side of the heating heat exchanger 11), a low-temperature water thermistor 402 (disposed on the outlet side of the circulation pump 12 in the hot water pipe 521 between the on-off valve 13), and a freeze monitoring thermistor 404 (Disposed in the cooling heat exchanger 25), the room temperature thermistor 405 and the humidity sensor 406 (the cooling heat exchanger 2).
5), a hot air thermistor 407 (disposed on the cold / hot air outlet side), and an outside air temperature thermistor 408.

In the hot water heating type air conditioning system having the above configuration, the control circuit 400 controls the indoor unit alone heating operation using only the indoor unit 2, the mat alone heating operation using only the floor heating panel 3, the floor heating panel 3 and the indoor unit 2. , A dry operation using only the indoor unit 2, a duet dry operation using the floor heating panel 3 and the indoor unit 2, and a cooling operation using the indoor unit 2 can be performed.

Next, the mat alone heating operation {above},
The indoor unit independent heating operation {above} and the duet heating operation {above} will be described.

[Mat Single Heating Operation] The mat single heating operation is an operation mode in which the room is heated only by the floor heating panel 3 as described above. When the mat alone is instructed by the remote controller 4 and the mat capacity (1st to 7th speed) is set, the control circuit 400 activates the circulation pump 12, the variable flow valve 14 is fully closed, and the shut-off valve 13 is open. The valve state and the gas burner 100 are set to the combustion state.

The relationship between the mat performance (first speed to seventh speed) set by the remote controller 4 and the mat surface temperature (target value) is as follows. 7th → 36 ° C, 4th → 31 ° C, 1st → 26 ° C

The control circuit 400 includes a low-temperature water thermistor 40
The temperature of the hot water detected in step 2 is a predetermined temperature (6 in this embodiment).
(5 ° C.) input of gas burner 100 (16
(8 steps from 00 kcal / h to 3000 kcal / h) at predetermined time intervals. Further, the control circuit 400 checks the outside air temperature detected by the outside air temperature thermistor 408 and the mat capacity set by the remote controller 4 against the data table shown in Table 1 to open (ON) the on-off valve 13: Close the valve (O
FF) Determine the time. The unit of time is “minute”.

[0026]

[Table 1]

In the hot water heating type air conditioning system A, in the mat independent heating operation, the control means includes a mat capacity (first speed to seventh speed) set by the remote controller 4 and an outside temperature thermistor 40.
8 is compared with the data table shown in Table 1, the opening (ON) time of the on-off valve 13: the closing (OFF) time is determined, and the heat release amount of the floor heating panel 3 is determined. Controlling. The ON / OFF control simplifies the control program.

With this configuration, depending on the difference in outside air temperature,
Even if the amount of heat radiation from the floor heating panel 3 to a place other than the floor surface, for example, under the floor, changes, the amount of heat radiation from the floor heating panel 3 to the floor surface can be made substantially constant. In other words, even if the outside air temperature is different due to the difference in the operation day or the operation time zone, the set mat capacity (1st speed to 7th speed)
If the speeds are the same, the amount of heat radiation (mat surface temperature) from the floor heating panel 3 to the floor can be made substantially constant.

For this reason, even when the outside air temperature is low or high, the degree of warming of the floor surface is substantially the same, so that the setting of the mat capacity is easy, and the hot water heating type air conditioning system A is easy to use (the mat alone). During heating operation). In addition, it is possible to intuitively (empirically) know how fast the mat capacity should be to make the floor temperature appropriate, and the hot water heating type air conditioning system A is easy to use.

[Indoor unit independent heating operation] The indoor unit independent heating operation is an operation mode in which the room is heated only by the indoor unit 2 as described above. When the target room temperature is set by the remote controller 4 and the indoor unit alone heating operation is instructed, the control circuit 4
At 00, the circulation pump 12 is operated, the on-off valve 13 is closed, the gas burner 100 is in the combustion state, and the variable flow rate valve 14 is fully opened.

The control circuit 400 determines the target hot water temperature based on the target room temperature set by the remote controller 4 and the detected room temperature detected by the room temperature thermistor 405 (58 ° C. to 85 ° C.).
Of the gas burner 100 (1600 kcal / h to 3000 kcal / h) such that the hot water temperature detected by the high-temperature water thermistor 401 becomes the target hot water temperature.
Eight steps). The convection fan 20 of the indoor unit 2
0 is controlled in eight steps corresponding to the input of the gas burner 100.

[Duet heating operation] The duet heating operation is an operation mode in which the room is heated by the floor heating panel 3 and the indoor unit 2 as described above. Set the target room temperature and mat capacity (1st to 7th speed) with the remote control 4,
Instructs duet heating operation.

The control circuit 400 brings the circulation pump 12 into the operating state, the on-off valve 13 into the open state, and the gas burner 100 into the combustion state. The control circuit 400 includes a high-temperature water thermistor 40
The input (1600 kcal / h to 3000 kcal / h) of the gas burner 100 is set so that the hot water temperature detected by the air conditioner 1 becomes the target hot water temperature (80 ° C.) during the duet heating operation.
h eight stages). The convection fan 2 of the indoor unit 2
00 is controlled in eight steps corresponding to the input of the gas burner 100.

As the control of the hot water to the indoor unit 2, the required amount of heat Q to be released into the room based on the target room temperature set by the remote controller 4 and the room temperature detected by the room temperature thermistor 405.
Is calculated, and the flow rate variable valve 14 is controlled so as to obtain a 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.

Even if the opening of the variable flow rate valve 14 is changed, the floor heating panel 3 (second hot water circuit 5
The flow rate of hot water flowing through 2) hardly changes. For example, in order to reduce the flow rate to the heating heat exchanger 16,
When the opening degree of 4 is narrowed, the flow rate flowing through the bypass pipe 510 increases, so the flow rate to the floor heating panel 3 (the flow rate flowing through the heating heat exchanger 16 + the flow rate flowing through the bypass pipe 17).
Hardly changes.

The amount of heat radiation Q in the heating heat exchanger 16 and the flow rate L of hot water flowing through the heating heat exchanger 16 are represented by the following equations. T _IN is the temperature of the hot water introduced into the heating heat exchanger 16, and T _out is the temperature of the hot water flowing _out of the heating heat exchanger 16.

Q = L × (T _IN −T _out ) Equation 1 L = Q / (T _IN −T _out ) Equation 2

Therefore, if the heat radiation amount Q is calculated and the temperature T _IN and the temperature T _out are detected, the flow rate L of the hot water can be calculated based on the equation (2). Control the valve 14.

The hot water heating type air conditioning system A controls the mat side in the duet heating operation as follows. As in the case of the above-described single-mat heating operation, the control unit performs the control based on the mat capacity set by the remote controller 4 and the outside air temperature detected by the outside air temperature thermistor 408 as shown in Table 1.
The opening / closing valve 13 is controlled by the opening (ON) time: closing (OFF) time shown in FIG.

As described above, since the amount of heat radiation from the floor heating panel 3 and the amount of heat radiation from the indoor unit 2 are controlled by the amount of hot water supplied, respectively, it is possible to individually control the amount of heat radiation during the date heating. it can.

When the room temperature detected by the room temperature thermistor 405 is lower than 20 ° C., the following rise correction control is performed. (Rise correction control) Regardless of the mat performance (1st to 7th speed) set by the remote controller 4, the performance is set to 7th speed. Then, every time 20 minutes elapse, the speed is reduced by one speed until the mat speed set by the remote controller 4 is reached, thereby improving the rise.

In each of the above operations, the gas burner 100
As for combustion control, the combustion fan 1
After performing the pre-purge at 10, the solenoid valves 107 and 108 and the proportional valve 104 are controlled in a predetermined sequence to supply fuel to the gas burner 100 and perform an ignition operation to generate a spark discharge to the ignition electrode 105, and perform a flame rod operation. 106
Detects the ignition, the combustion fan 110 and the proportional valve 10
4 to control the input of the gas burner 100.

At the end of the operation, the control circuit 400 keeps the circulation pump 12 in operation until two minutes have elapsed since the combustion of the gas burner 100 was stopped. Thus, overheating of the heating heat exchanger 11 is prevented, and the residual heat can be used effectively.

The present invention includes the following embodiments in addition to the above embodiment. a. As the heating means, another heating source (for example, an electric heater) may be used instead of the gas burner 100.
~ 3). b. In the above embodiment, the opening and closing valve 13 may use a flow control valve whose opening degree can be varied as the control valve (corresponding to claims 1 and 2).

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a hot water heating type air conditioning system according to an embodiment of the present invention.

[Explanation of symbols]

 A Hot Water Heating Air Conditioning System (Hot Water Floor Heating System) 3 Floor Heating Panel 4 Remote Control (Capacity Setting Means) 11 Heat Exchanger for Heating (Heat Exchanger) 12 Circulation Pump 13 Open / Close Valve (Control Valve) 15 Pressure Tank 51 1 hot water circuit 52 second hot water circuit 100 gas burner (heating means) 121 outflow side 122 inflow side 311 hot water inlet side 312 hot water outlet side 400 control means 401 high temperature water thermistor (hot water temperature detection means) 402 low temperature water thermistor (hot water temperature detection means) 408) Outside temperature thermistor (outside temperature detection means)

Claims (3)

[Claims] 1. A heating water circuit formed by connecting a heat exchanger heated by a heating means, a circulation pump, a control valve, and a floor heating panel buried in the floor in a ring, and a user sets a floor heating amount. Capacity setting means, a hot water temperature detecting means for detecting a hot water temperature on an outlet side of the heat exchanger, an outside air temperature detecting means for detecting an outside air temperature, and the heating means so that the hot water temperature becomes a predetermined temperature. And a control means for controlling the heating amount of the floor heating device and operating the control valve based on the set floor heating amount and the outside air temperature to control the heat release amount of the floor heating panel. 2. A first hot water circuit in which a heat exchanger heated by a heating means and a circulating pump are connected in a ring shape, and a control valve is provided on the way and a hot water inlet side of a floor heating panel embedded in the floor is provided. Connected to the outflow side of the circulation pump,
A second hot water circuit having a hot water outlet side connected to an inflow side of the circulation pump; a capacity setting means for allowing a user to set a floor heating amount; and a hot water temperature detection for detecting a hot water temperature on an outflow side of the circulation pump. Means, an outside air temperature detecting means for detecting an outside air temperature, and controlling a heating amount of the heating means so that the hot water temperature becomes a predetermined temperature, and the control based on a set floor heating amount and an outside air temperature. Control means for operating a valve to control a heat radiation amount of the floor heating panel. 3. The control valve is an open / close valve that stops circulation of hot water flowing through the hot water circuit or the second hot water circuit by closing the valve, and the control unit detects the set floor heating amount. The hot-water floor heating system according to claim 1 or 2, wherein the amount of heat released from the floor heating panel is controlled by changing a valve opening time ratio of the on-off valve based on an outside air temperature.