JPS5921472B2 - air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner capable of heating with at least warm air, such as a heat pump air conditioner or an oil hot air fan, and which has a variable heating capacity, and a floor space such as an electric carpet. Regarding an air conditioner combined with a surface radiant heater, an object of the present invention is to obtain an air conditioner that eliminates the drawbacks of conventional devices described below and realizes highly comfortable heating.

Conventional floor radiant heaters include electric carpets that use planar heating elements, and hot water floor heaters that obtain hot water using a heater and circulate this hot water over the floor. Sufficient and highly comfortable heating can be obtained even at low temperatures.

However, the energy source of this type of floor radiant heater is mainly electricity, and due to restrictions such as indoor wiring current capacity and wiring equipment current capacity, its power consumption is small, and its heating capacity is also relatively small. . For this reason, when the heating load is large, the floor surface temperature does not reach a predetermined temperature and a sufficient feeling of heating cannot be obtained. In such cases, it is necessary to use some kind of auxiliary heat source, one example of which is hot air heating. If residents realize that floor radiant heating alone is insufficient, hot air heating can be added. Alternatively, hot air heating is always used in conjunction with floor radiant heating, regardless of whether the heating capacity is sufficient or insufficient. In the former case, the hot air heating is controlled by the resident;
If you want to provide economical heating while maintaining comfort,
Frequent hot air heating control is required, which is complicated, and may sometimes result in unnecessary simultaneous use. In the latter case, the radiant floor heating and hot air heating operate completely independently, which may unnecessarily raise the room temperature and waste energy consumption. The present invention provides an air conditioner that eliminates the drawbacks of the conventional example described above, such as the complexity of operation and wasteful energy consumption.

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention. Reference numeral 1 indicates a so-called FF warm air fan using oil or gas as an energy source, as an example of an air conditioner capable of hot air heating.

Other examples of the FF warm air fan 1 include a heat pump air conditioner. 2 is an electric carpet as an example of a floor radiant heater.

Other examples of the electric carpet 2 include hot water floor heaters using oil, gas, or electricity as an energy source, and hot water floor heaters using solar heat as a main heat source. 3 is a controller that controls the FF warm air fan 1 according to the floor temperature of the electric carpet 2.

In order to simplify the following explanation, it is assumed that the heating capacity of the FF warm air fan 1 can be adjusted to two levels: Hi/Lo. The controller 3 has a configuration as shown in FIG. 2, for example.
30 is a thermistor as a means for detecting the floor surface temperature of the electric carpet 2; 31 is a thermostat that turns on and off a relay 31R that controls the operation of the electric carpet 2 according to the output of the thermistor 30; Thermostat 32R is a capacity setting device that determines the heating capacity of the FF warm air fan 1.
A relay controlled by the output of controls the operation stop of the FF hot air fan 1.

32P is a relay controlled by the second output of the thermostat 32, and operates as a means for controlling the heating capacity of the FF hot air fan 1 by controlling the solenoid valve 1A as a means for controlling the heating capacity of the FF warm air fan 1. do.

4 is a commercial power source.

FIG. 3 shows a specific example of a circuit with the configuration shown in FIG. 2. 30
A is a resistor, which is connected in series with the thermistor 30, and divides the power supply Vcc of the DC power supply 33 into VT.

VT increases as the floor surface temperature TF detected by the thermistor 30 decreases. VT is input to the first thermostat 31. The first thermostat 31 connects Vcc to the resistor 31.
Using the voltage VT2 divided by A and 31B as a non-inverting input,
The operational amplifiers 31C and VT2, each having VT as an inverting input, are composed of a resistor 31D and a diode 31E connected in series to form a hysteresis circuit for lowering the output of the operational amplifier 31C to VTl when it is LO. The output of the thermostat 31 is the same as the output of the operational amplifier 31C, and if the output power of the operational amplifier 31C is 1, the relay 31R is turned off and the LO
Then relay 31R turns on. Here, VTlkuVT!
, and each voltage corresponds to the floor surface temperature T, 〉T, respectively. The thermostat 32 has two sets of the same circuit configuration as the thermostat 31, one of which has resistors 32A and 32B.
, 32D1 operational amplifier 32C1 diode 32E, and relay 32R is turned on and off by the output of operational amplifier 32C.

When the output of the operational amplifier 32C is Hi, the non-inverting input voltage is a voltage VT3 corresponding to the floor temperature T3, and when it is LO, the non-inverting input voltage is a voltage VT1 corresponding to the floor temperature T1. Here, T3 is T, and T is T3. Others are resistors 32F, 32G,
It is composed of a 32i1 operational amplifier 32H1 and a diode 32j, and a relay 32P is turned on and off by the operational amplifier 32H output. The inverting input of the operational amplifier 32H is VT, and the non-inverting input is VT4, which corresponds to the floor temperature T4 when the operational amplifier 32H output is Hi, and VTl when the operational amplifier 32H output is LO. Here, T4 minus T3. 34 momentarily changes to V when the switch 35 is turned on to start heating.
This is a capacitor for raising T to Vcc and providing a low cross signal to the thermostats 31 and 32.

Next, the operation of the circuit shown in FIG. 3 will be explained with reference to the timing chart shown in FIG. 4.

In Figure 4, A is the floor temperature, and A is the output of the operational amplifier 31.
C is on/off of relay 31R, 2 is the output of operational amplifier 32C, E is on/off of relay 32R, 2 is operational amplifier 3
The output of 2H, 卺 indicates the on/off of the relay 32P, and 图 indicates the heating capacity of the FF warm air fan 1. Heating starts at time tφ.
Since the floor surface temperature TF is TF<T1, VT>1, the output of the operational amplifier 31C becomes LO, the relay 31R is turned on, and the electric carpet 2 is operated. Immediately after the start, T=
Since it is Cc, VT>VT3 and VT>VT4,
The outputs of both the operational amplifiers 32C and 32H become LO, the relays 32R and 32P are both turned on, and the FF hot air fan is operated at heating capacity Hi.The floor surface temperature TF rises due to the operation of the electric carpet 2 and the FF hot air fan 1, and at time t1 DeT
, then VT<VTl and the operational amplifier 31C
, 32C, 32H become Hi, and relay 31R
, 32R, and 32P are all turned off, and both the electric carpet 2 and the FF warm air fan 1 are stopped. As a result, the floor surface temperature TF decreases, and when it reaches T2 at time T2, VT>
VT, and the output of operational amplifier 31C becomes LO,
Relay 31R is turned on and electric carpet 2 is operated.
When the load is light, only the electric carpet 2 is used to control the floor surface temperature TF.
increases, and at time T3, TF reaches T1 again, and the electric carpet 2 stops. Thereafter, when the load is light, a substantially constant floor temperature can be maintained by simply stopping the operation of the electric carpet 2. However, when the load is heavy, for example, even if the electric carpet 2 is operated at time T4, the floor sensitivity TF does not increase and continues to decrease. At time T5, TF is T3
When it reaches VT>VT3, the output of the operational amplifier 32C becomes LO, the relay 32R is turned on, and the FF warm air fan 1 operates. In this case, the relay 32P is not turned on, so the operation is performed at a small capacity LO. As a result, TF rises (dotted line in Figure 4), and when it reaches T1, both the electric carpet 2 and the FF warm air fan 1 stop. If the load is heavy, use FF warm air fan 1.
Even in LO operation, if the floor surface temperature does not rise due to the rise in room temperature, that is, it will decrease, and when it reaches T at time T6, VT>VT, and the output of operational amplifier 32H will also become LO. , relay 32P turns on, solenoid valve 1A
is turned on, and the heating capacity of the FF warm air fan 1 becomes high capacity Hl. As a result, the room temperature rises, the amount of heat dissipated from the floor decreases, the floor temperature rises, and when TF reaches T1 at time T7, both the electric carpet 2 and the FF hot air fan stop. According to the embodiment described above, the electric carpet 2 and the FF warm air fan 1 can be controlled fully automatically, and the complexity of operation as in the conventional example can be eliminated.

Furthermore, the floor surface temperature can be kept approximately constant, providing a comfortable feeling of heating. Since the capacity of the FF warm air fan 1 is controlled so that the floor surface temperature is constant, energy consumption can be used effectively. When heating starts up, floor radiant heating and hot air heating are used together, so the startup speed is fast. When the load is relatively small, only radiant heating is used, and only when the capacity is insufficient, hot air heating is added, and the heating capacity is gradually increased starting from the lowest, resulting in extremely high energy usage efficiency.
In the above explanation, the heating capacity is set to Hi/L as a warm air heater.
Although the description has been made using an FF hot air fan that can be switched to O, it may be one that can be changed continuously.O Of course, it is not necessary to use an FF hot air fan as long as it is a hot air heater.

Although the controller 3 is provided independently of the electric carpet 2 and the FF warm air fan, it may be attached to either one. That is,
For example, something like storing it inside the casing of FF warm air fan 1.
This type of modification is easy to make. The thermistor 30, thermostat 31, relay 31R, etc. as floor temperature controllers of the electric carpet 2 are dedicated to the electric carpet 2, and separately, a second thermistor may be used as a floor temperature detector. good. Modifications such as those described above are possible without departing from the scope of the invention. As is clear from the above description, according to the present invention, the floor surface temperature of the floor radiant heater is detected and the hot air heating capacity is automatically controlled accordingly. Wasted energy consumption due to the use of necessary hot air heating can be eliminated, and since radiant heating is preferentially used, an extremely comfortable heating feeling can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram of an air conditioner according to an embodiment of the present invention, FIG. 2 is a system diagram of a controller of an air conditioner according to the present invention, and FIG. 3 is a specific diagram of the controller shown in FIG. Circuit diagram, Figure 4 is the 3rd
FIG. 3 is a timing chart diagram for explaining the operation of the circuit shown in the figure. 1...FF warm air machine, 2...Electric carpet, 3...Controller, 1A...Solenoid valve for controlling the heating capacity of FF hot air machine, 30 ...Thermistor for floor temperature detection, 32...Thermostat for FF warm air machine control, 32R...Relay for FF hot air machine operation control, 32P... ...Relay for controlling the heating capacity of the FF warm air machine.

Claims (1)

[Claims] 1. An air conditioner that is capable of heating at least by hot air and whose heating capacity is variable, a floor radiant heater, a capacity setting device that determines the heating capacity according to the output of the floor temperature detection means, and said capacity. An air conditioner comprising: a controller comprising means for controlling the heating capacity of the air conditioner according to the output of the setting device.