JPS5924334B2 - air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner that combines an air conditioner such as a heat pump air conditioner that can heat a conditioned space with at least warm air, and a floor radiant heater such as an electric carpet. .

In particular, the present invention provides an air conditioner with high comfort, which is equipped with a controller that controls the air conditioner and the floor radiant heater, in order to eliminate the following disadvantages of the above-mentioned combination air conditioner. The purpose is to provide an air conditioner that achieves air conditioning. Conventionally, there have been individual heaters capable of hot air heating, such as heat pumps and floor radiant heaters.

Floor radiant heating provides an extremely comfortable feeling even when the floor temperature is kept low (for example, 30° C.). however,
For example, in the case of an electric heater such as a planar heating element such as an electric carpet, the power consumption is relatively small due to restrictions on indoor wiring, wiring equipment, etc., and therefore the heating capacity itself is small. Therefore, when the heating load is large, that is, when the outside air temperature is extremely low, the predetermined temperature may not be reached and a sufficient heating feeling may not be obtained. For this purpose, auxiliary heating is used, an example of which is hot air heating. If residents realize that floor radiant heating alone is not sufficient for heating, hot air heating will be added. Since this operation is all done manually by the resident, the following problems arise. First of all, it is up to the resident to decide which of the two types of heating to use preferentially, so it is not always the case that radiant heating, which is more energy efficient, is used preferentially, which may result in wasted energy consumption. There is. Second, even if radiant heating is used preferentially, when to use hot air heating in combination depends solely on the resident's intuition, which may lead to unnecessary combination use, resulting in wasted energy consumption. This may occur. Thirdly, in order to solve the second problem of unnecessary combined use, it is necessary to frequently turn on and off the hot air heating, which is extremely complicated to operate. Fourth, some air conditioners capable of hot air heating come with a thermostat, but using this thermostat seems to solve the second and third problems, but this is not true for radiant heating. Since radiant heating, which is highly energy efficient, is not necessarily used preferentially, problems similar to the first problem may occur. FIG. 1 is a schematic diagram of an embodiment of the present invention.

IA is the indoor unit of the heat pump air conditioner 1 as -V7U of the hot air heater, IB is the outdoor unit, IC is the power plug, and ID is the connecting member between the indoor and outdoor units IA and IB, which consists of piping, electric wires, etc. 2A is an electric carpet as an example of a floor radiant heater.

2B is its power plug.

A controller 3 has a function of controlling the heat pump air conditioner 1 according to at least the floor temperature of the electric carpet.

The controller 3 has the configuration shown in FIG. 2, for example. 300 is a DC power supply.

309 is a switch that turns on and off the power supply to the following circuits.

301 is a thermistor for detecting floor surface temperature, which is a temperature detecting element of the first thermostat and the second thermostat.

The first thermostat includes, in addition to the thermistor 301, a bridge composed of resistors 302, 303, and 304, a hysteresis circuit composed of a comparator 305, a resistor 306, and a diode 307, and a relay 308, and the detected temperature is θH> When the floor surface temperature reaches θH at θ, the output of the comparator 305 becomes “Hi” and the relay 308 is turned off. When the floor temperature drops to θM, the comparator 30
5 output becomes Lo″″ and the relay is turned on. In addition to the thermistor 301, the second thermostat includes a low resistance 302,
Bridge and comparator 31 composed of 311 and 312
3. It consists of a hysteresis circuit consisting of a resistor 314 and a diode 315, and a relay 316, and the detected temperature is θ. and θ
At L, θ. 〉θ1〉θ1. When the floor temperature reaches θH, relay 316 turns off, and when it reaches θL, relay 31 turns off.
6 turns on. Next, this operation will be explained with reference to the timing chart of FIG.

In Fig. 3, A indicates the floor surface temperature θ1, the condition of the electric carpet, and C indicates the condition of the heat pump air conditioner. Time tφ
Turn on switch 309.

Floor temperature θ. Then, relays 308 and 316 are both turned on, power is applied to heater 2H of electric carpet 2A, and floor heating is performed. At the same time, the relay 316 is turned on, so that the indoor fan motor 1A1 of the heat pump air conditioner 1 is energized, and the four-way valve 1B3 is energized via the heating side contact H of the cooling/heating changeover switch 1A2, so that the refrigeration cycle is changed to the heating cycle, and the relay 316 is turned on. The compressor motor 1B1 and the outdoor fan motor 1B2 are energized through the 316 contacts, and the heat pump air conditioner 1 starts heating operation and also starts hot air heating. In other words, when starting up, both types of heating are used and the speed is increased. If the floor surface temperature θ is in the state indicated by the broken line in Figure 3 A,
Even if θ<θH
If so, heating of both will start.

This is because at the moment the switch 309 is turned on, the inverted input voltage of the comparator 305 is zero, and the resistance value of the thermistor 30 is extremely large, that is, equivalently, θ becomes θ1. After a certain period of time has elapsed, the capacitor 310 completes charging, and the inverting input of the comparator 305 receives the floor surface temperature θ.
The voltage will be considerable. At time ti, the floor surface temperature θ is θ. When the temperature reaches , both relays 308 and 316 are turned off, and both radiant heating and hot air heating are stopped.

When the floor temperature decreases due to the stop and becomes θ<θM at time t2, the relay 308 is turned on and radiation heating starts again.
At time t3, θ>θo, and the switch is turned off again.

If the heating load is large, the room temperature and outside temperature will be low, and the amount of heat radiated from the floor will be large.

Such a case is shown after time t3. At time t4 θ〈
The temperature reaches θM, and radiant heating starts, but the floor surface temperature θ cannot be raised to θH using only the heater 2H, and on the contrary, it further decreases. When θ decreases to θL at time t6, the relay 316 is turned on, the hot air heating by the heat pump air conditioner 1 is resumed, the room temperature is raised thereby, the amount of heat radiated from the electric carpet 2A is reduced, and the floor surface temperature θ is decreased. Rise. At time t6, θ>θ. As a result, both heating systems stop. After t6, the above-described operation is repeated to perform heating. During cooling, only the heat pump air conditioner 1 performs cooling operation. If the switch 1A2 is set to the cooling side contact C, the compressor motor 1 of the outdoor unit 1B will be activated depending on whether the room thermostat 1A3 is turned on or off.
B1, the outdoor fan motor 1B2 is controlled to stop operating. According to the present invention, it is possible to perform heating that takes advantage of the characteristics of both hot air heaters and floor radiant heaters, such as the comfort of the former and the high performance of the latter, and also takes advantage of the energy saving properties of the radiant heater. heating can be done. The hot air heater is automatically controlled, eliminating various wastes seen in conventional systems. Particularly in warm air heaters that use heat pump air conditioners, the heating capacity is currently being improved by ignoring the balance of the cooling capacity. Since you only need to set the settings according to the cooling load, you only need a smaller capacity heat pump air conditioner compared to conventional ones, which will result in energy savings. In the embodiment shown in FIG. 2, the thermistor as a floor temperature detector is used as the first
Although the second thermostat and the second thermostat for hot air heating control are used in common, independent floor surface temperature detectors may be used for each thermostat.

Further, although the controller 3 is provided independently of the floor radiant heater 2A and the hot air heater 3, it may be attached to either one.

That is, for example, the first thermostat and the second thermostat may be attached to the radiant heater 2A, and only the relay 316 of the first thermostat may be provided in the indoor unit 1A of the hot air heater 1. Also, power plug 1C or 2
It is also possible to integrate B and provide a common power plug for the controller 3, or to share one of the plugs.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the air conditioner of the present invention, FIG. 2 is a circuit diagram of an embodiment of the controller in the same device, and FIG.
The figure is a timing chart of one embodiment of the present invention. 1... Heat pump air conditioner, 2A... Electric carpet, 3... Controller, 301... Thermistor, 30
8,316...Relay.

Claims (1)

[Claims] 1. An air conditioner capable of heating at least by hot air, a floor radiant heater, a thermostat that responds to the floor temperature during operation of the floor radiant heater, and an air conditioner that responds to the temperature of the floor during operation of the floor radiant heater; An air conditioner consisting of a controller that controls the machine.