JPH02259348A - Air conditioner - Google Patents

Abstract

PURPOSE:To maintain a comfort level as good as that of the normal heating mode operation with simple procedures by automatically lowering the set temperature by a predetermined amount at the time of switching from the normal air heating mode operation to the radiation heating mode operation. CONSTITUTION:When the space heating solely by an air heating means 1A is selected with a mode selection means 5, a control device 8 causes a normal air heating to be performed through controlling the operation of the air heating means 1A in accordance with the deviation determined by a first comparator means 6 between the room temperature signal from the room temperature sensing means 2 and the set temperature dictated by a setting means 3. On the other hand, when the heating mode by both the radiation heating means 1B and air heating means 1A is selected, the set temperature dictated by the setting means 3 is automatically lowered by a setting changing means 4 by a predetermined amount, which is compared in a second comparator means 4 with the room temperature detected by the room temperature sensing means to determine the deviation between them. The operation of the air heating means 1A is controlled based on the deviation so determined. Thus, a comfort level as good as the normal heating mode operation can be maintained with simple procedures.

Description

[Detailed description of the invention] [Purpose of the invention] (Industrial application field) The present invention relates to an air conditioner.

(Prior art) Conventionally, for example, a radiant heat exchanger is included in a refrigeration cycle,
In an air conditioner that circulates refrigerant to perform radiant heating, it is possible to selectively switch between operation of only the indoor heat exchanger and combined operation of the radiant heat exchanger and indoor heat exchanger, or One operation prioritizes air heating from the indoor heat exchanger side by forcing ventilation into the indoor heat exchanger, and the other operation prioritizes radiant heating from the radiant heat exchanger side by suppressing ventilation to the indoor heat exchanger. I'm trying to switch, but
In either case, compressor operation control is performed by comparing the difference between the set temperature set by the user and the room temperature measured by a temperature sensor. If you raise the set temperature under this kind of control, the room temperature will rise correspondingly, but at the same time the relative humidity will drop, and in some cases,
When the heating was operated for a long time while sleeping, etc., people sometimes felt thirsty and felt uncomfortable due to dryness.

Therefore, users can switch from heating operation using only an indoor heat exchanger to heating operation using both an indoor heat exchanger and a radiant heat exchanger, or switch from an operation that prioritizes air heating using the indoor heat exchanger to a heating operation that uses radiant heat exchanger. Every time I switched to a system that prioritizes radiant heating, I had to change the set temperature and the air volume of the indoor fan.

(Problems to be Solved by the Invention) As described above, in conventional air conditioners, during heating operation, the relative humidity decreases as the room temperature rises, so when operating for a long time, thirst and There was a problem of feeling uncomfortable due to dry air.

The present invention eliminates these conventional drawbacks, and in addition to normal heating operation, it is simple to operate and maintains the same comfort as normal heating operation, and even when operating for a long time, it does not cause problems due to thirst. To provide an air conditioner that can perform heating operation with less discomfort.

[Structure of the invention]

(Means for solving b1M!!) In order to achieve the above object, the air conditioner of the first invention includes an air heating means that heats the indoor air by raising the temperature of the indoor air, and a heating unit that uses radiant heat to heat the room. A mode selection means for selecting a first mode in which heating is performed using only the radiant heating means and the air heating means, and a second mode in which heating is performed by the air heating means and the radiant heating means; and a room temperature detection means for detecting the indoor temperature using an indoor temperature sensor. a temperature setting means for setting a set temperature; a first comparison means for outputting a comparison signal comparing the difference between the indoor temperature detected by the room temperature detection means and the set temperature set in the temperature setting means; a setting changing means for lowering the set temperature set by the means by a predetermined value; and a second comparison for comparing the difference between the indoor temperature detected by the room temperature detecting means and the set temperature changed by the setting changing means and outputting a comparison signal. and controlling the operation of the air heating means based on a comparison signal outputted by the first comparison means when the first mode is selected by the mode selection means, and by the second comparison means when the second mode is selected. and a control means for controlling the operation of the air heating means based on the output comparison signal.

The air conditioner of the second invention includes a compressor, a radiant heat exchanger,
A refrigeration cycle in which an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger are sequentially connected by refrigerant piping, an indoor fan that ventilates the indoor heat exchanger, and an air heating mode that forcibly ventilates the indoor heat exchanger. , mode selection means for selecting a radiant heating mode that suppresses ventilation to the indoor heat exchanger; room temperature detection means for detecting indoor temperature with an indoor temperature sensor;
a temperature setting means for setting a set temperature; a first comparison means for outputting a comparison signal comparing the difference between the room temperature detected by the room temperature detection means and the set temperature set by the temperature setting means; and the temperature setting. a setting changing means for lowering the set temperature set by the means by a predetermined amount; and a second unit for outputting a comparison signal comparing the difference between the indoor temperature detected by the room temperature detecting means and the set temperature changed by the setting changing means. a comparison means; when the air heating mode is selected by the mode selection means, the pressure Set is controlled based on the comparison signal output by the first comparison means; when the radiant heating mode is selected, the pressure Set is controlled; and a control means for controlling the compressor based on the comparison signals output by the two comparison means.

(Function) In the configuration of the first invention, when heating using only the air heating means is selected, the operation of the air heating means is normally controlled so that the indoor temperature detected by the temperature sensor becomes the set temperature. control the operation of the air heating means so that when heating by the radiant heating means and the air heating means is selected, the indoor temperature is automatically lowered by a predetermined value from the set temperature; By doing so, it becomes possible to perform heating while maintaining the same level of comfort as in normal heating operation and keeping the relative humidity high.

In the configuration of the second invention, when the air heating mode in which the air is forced to follow the indoor heat exchanger is selected, the heat exchange action is hardly performed on the radiant heat exchanger side, but is performed on the indoor heat exchanger side. , in the control, pressure is applied so that the indoor temperature detected by the temperature sensor becomes the set temperature.
By controlling this, heating similar to normal air heating is possible.

In addition, when the radiant heating mode that suppresses ventilation to the indoor heat exchanger is selected, only heat exchange by natural convection is performed on the indoor heat exchanger side, and most of the heat exchange action is performed on the radiant heat exchanger side. Therefore, by controlling the pressure machine so that the temperature automatically reaches the set temperature,
There is heating that maintains the same level of comfort as regular air heating while keeping relative humidity high.

(hereinafter referred to as Keishiro) (Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the basic configuration of the first invention.

In the figure, the air heating means IA increases the indoor air temperature to perform heating.

The radiant heating means IB heats the room by radiating heat.

Room temperature detection means 2 detects the indoor temperature using an indoor temperature sensor.

The temperature setting means 3 sets a set temperature.

The setting change means 4 outputs a set temperature signal which is the set temperature set by the temperature setting means 3 lowered by a predetermined value. The mode selection hand f'ff15 selects a first mode in which heating is performed only by the air heating means IA, and a second mode in which heating is performed by the air heating means IA and the radiant heating means IB.

The first comparison means 6 outputs a comparison signal that compares the difference between the room temperature detected by the room temperature detection means 2 and the set temperature set by the temperature setting means 3.

The second comparison means 7 outputs a comparison signal that compares the difference between the room temperature detected by the room temperature detection means 2 and the set temperature changed by the setting change means 4.

The control means 8 controls the operation of the air heating means IA based on the comparison signal output by the first comparison means 6 when the first mode is selected by the mode selection means 5, and when the second mode is selected. controls the operation of the air heating means IA based on the comparison signal output from the second comparison means 7.

That is, in the embodiment of the present invention, the mode selection means 5 selects the first
When a mode is selected, a control signal is output from the mode selection means 5 to the control means 8, and heating is performed only by the air heating means.

The control means 8 to which the control signal is input compares the room temperature detected by the room temperature detection 2 and the set temperature set by the temperature setting means 3, and controls the operation of the air heating means IA.

Next, when the second operation mode is selected by the mode selection means 5, a control signal is outputted from the mode selection means 5 to the control means 8, and the heating is performed by the air heating means IA and the radiant heating means IB. do. The control means 8 to which the control signal has been input compares the difference between the room temperature detected by the room temperature detection means 2 and the set temperature lowered by a predetermined value by the setting change means 4.
It is designed to control the operation of the air heating means.

Next, an air conditioner capable of cooling and heating will be described as an embodiment of the present invention.

FIG. 2 is a refrigeration cycle system diagram of an embodiment of the first invention.

In the figure, an indoor unit 20 and an outdoor unit 30 are connected via connection piping to form a refrigerant circulation path.

Among these, the indoor unit 20 includes an indoor heat exchanger 21, a cross-flow fan 22 that sends air into the indoor heat exchanger 21, a three-way valve 24 that switches the refrigerant path, and a radiation heat exchanger 23. The refrigerant can be flowed only through the indoor heat exchanger 21 or can be flowed through both the indoor heat exchanger 21 and the radiant heat exchanger 23. The outdoor unit 30 also includes an outdoor heat exchanger 31, a propeller fan 33 that sends air to the outdoor heat exchanger 31, and a compressor 32.
, a four-way valve 34 that switches the refrigerant path depending on whether the operation is cooling or heating, a refrigerant control expansion valve 35, and a two-way valve 38.

FIG. 3 is a partially cutaway perspective view of the indoor unit 20 of this air conditioner, and FIGS. 4(a) and 4(b) show the indoor unit 20 in heating operation, and
FIG. 3 is an explanatory diagram showing the flow of air during cooling operation. Here, the indoor unit 20 has a suction grill 51 at the lower front.
, each having a blowout creel 52 on the upper surface, and further,
An air filter 53 and a galvanometric fan 22 driven by a fan motor 28 are provided inside the suction grill 51. Further, an indoor heat exchanger 2'1 is provided inside the indoor unit 20, and a radiant heat exchanger 23 is provided on the front panel of the indoor unit 20. Further, an indoor temperature sensor for detecting the indoor temperature is attached to the back of the galvanometric fan 22. Further, a display section 27 is provided on the upper surface of the unit.

FIG. 5 is a block diagram showing the configuration of a portion particularly related to the first invention of the control section that controls this air conditioner.

In the figure, a control unit 57 includes a microcomputer, and an operation on/off switch 59 provided on a remote control device (not shown).
Signals from the cold/warm selector switch 56, the sleep mode switch 58, which is a mode selection means for switching between the first and second modes, and the temperature setting section 26 are input, and the signals are detected by the indoor temperature sensor 25 provided in the indoor unit. A signal is input.

In addition, in response to these inputs to the control unit 57, the display unit 2
7, fan motor 28, four-way valve 34, three-way valve motor 1
4a, a control switch 55 provided between the AC power source 54 and the compressor 33 is controlled.

FIG. 6 is a control flowchart of the control section 57 in the first invention configuration.

Hereinafter, the operation of the embodiment of the first invention will be explained together with this flowchart.

First, in step 110, it is determined whether the operation switch 59 is on or off. If it is determined that it is on, the process proceeds to step 111, where it is determined whether the cooling/heating changeover switch 56 is outputting a cooling operation command or a heating operation command. to decide.

Here, if it is determined that it is a heating operation command, step 112
Proceeding to step 113, the controller 57 switches the four-way valve 34 to the side opposite to that shown in FIG.
The set temperature TS is read, the process proceeds to step 114, the indoor temperature Ta is read in response to the detection signal from the indoor temperature sensor 25, and the process proceeds to step 115, where it is determined whether the sleep mode switch 58 is on or off.

If it is determined that the sleep mode switch is off, the control device 57 outputs a normal heating operation command, and step 121
The process proceeds to step 122, where the indoor fan motor is driven, the indoor fan is activated, and the process proceeds to step 122, where the three-way valve motor 2 is activated.
4a (FIG. 5) to switch the three-way valve 24 to the side shown in FIG.

The process then proceeds to step 123, where the set temperature TS is compared with the temperature Ta detected by the indoor temperature sensor, and if the detected temperature Ta is lower than the set temperature Ts, the process proceeds to step 124, where the control device 57 turns on the control switch 55. state, and the compressor 33 is driven. Thereby, the compressor 33 circulates the refrigerant in the direction shown by the dashed arrow.

At this time, in the indoor unit 20, the indoor heat exchanger 2
Since the refrigerant flows through 1 and this causes vertical tightening, Fig. 4 (a)
), the suction grill 5 is
The air sucked in from the indoor heat exchanger 21 absorbs the heat and is blown out from the suction grill 52 as warm air.

As a result, the room is heated with warm air. As a result of such operation, the room temperature rises, and if the temperature detected by the indoor temperature sensor 25 exceeds the set temperature, the control device 57 switches the control switch 5
5 is turned off to stop the compressor 33. Further, when the room temperature has fallen to a certain degree, the control device 57 turns on the control switch 55 to restart the heating operation.

Next, when it is determined in step 115 that the sleep mode switch 58 has been turned on and a sleep operation command has been output, the process proceeds to step 116, where the control unit 57 causes the fan to rotate at a lower speed than when heating using only the indoor heat exchanger. (Including shutdown or repeated shutdowns) Here, the indoor fan air volume is lower than when heating using only the indoor heat exchanger.
This is because the radiant heat exchanger and the indoor heat exchanger are connected during the same cycle, so when the radiant heat exchanger is used, it is necessary to maintain the radiant heat exchanger at a high temperature. Thereafter, the process proceeds to step 117, where the three-way valve motor 24a (FIG. 5) is driven to switch the three-way valve 24 to the side opposite to that shown in FIG.

Then, proceeding to step 118, the control unit 3f57 compares the changed temperature Tz, which is the set temperature Ts lowered by a predetermined value, with the indoor temperature Ta, and similarly to the comparison control between the set temperature Ta and the indoor temperature Ta, the control unit 3f57 determines that the changed temperature Tz is the indoor temperature. If it is lower than Ta, the process proceeds to step 119, and the control device 57 switches the control switch 55
is turned on to drive the compressor 33. Thereby, the compressor 33 circulates the refrigerant in the direction shown by the dashed arrow. At this time, in the indoor unit 20, the refrigerant flows through both the indoor heat exchanger 21 and the radiant heat exchanger 23, and since both of them operate as condensers, as shown in FIG. 4(a), The air sucked from the suction grille 51 by the cross-flow fan 22 absorbs heat from the indoor heat exchanger 21 and is blown out from the suction grille 52 as warm air. Further, the radiant heat exchanger 23 emits radiant heat. In this way, the room can be heated using both warm air and radiant heat. As a result of this operation, the room temperature rises, and if the temperature detected by the indoor temperature sensor 25 exceeds the changed temperature TZ, the control device 1f57 or the control switch 55 is turned off to stop the compressor 33.

Further, when the hot air has decreased to a certain extent, the control device 57 turns on the operation switch 55 to restart the heating operation.

Next, in step 110, the operation switch is turned on, and the process proceeds to step 111. When it is determined that the cooling/heating changeover switch 56 has output a cooling operation command, the control device 57 turns on the three-way valve 24 and the four-way valve 34, as shown in FIG. By switching to the side shown in , the refrigerant is circulated through the compressor 33 in the direction shown by the solid arrow. At this time, although the refrigerant flows into the indoor heat exchanger 21 of the indoor unit 20 and operates as an evaporator, the refrigerant does not flow into the radiant heat exchanger 23.

Therefore, as shown in FIG. 4(b), the air sucked in from the suction grill 51 by the galvanometric fan 22 has its heat removed by the indoor heat exchanger 21 and is blown out from the suction grill 52 as cold air. As a result, when the room temperature decreases and the temperature detected by the indoor temperature sensor 25 falls below the set temperature, the control device 57 turns off the control switch 55 and stops the compressor 33.

Further, when the room temperature rises to a certain degree, the control device 57 or the operation switch 55 is turned on to restart the cooling operation.

Note that it is desirable to install a heat insulating material (not shown) between the indoor heat exchanger 21 and the radiant heat exchanger 23 so that the radiant heat exchanger does not exchange heat with the air blown by the cross-flow fan. .

In this embodiment configured as described above, if the low limit mode switch is turned off, normal heating operation can be performed quickly until the set temperature is reached without allowing the refrigerant to flow to the radiant heat exchanger.

In addition, by turning on the sleep mode switch and circulating the refrigerant through the radiant heat exchanger to heat the room with radiant heat and controlling the temperature to a predetermined reduction from the set temperature, as shown in Figure 7, - Because of this effect, it is possible to maintain the same level of comfort as in normal heating operation even with a difference in indoor air temperature, and as shown in Figure 8, since the temperature is kept low, the relative humidity can be maintained high.

Therefore, in this mode, the thirst caused by heating is eliminated, and Ando operation suitable for long-time driving and sleeping is possible.

In addition, from the state in which the heating operation is performed using only the air heating means in the first mode so that the indoor temperature becomes the same as the set temperature,
When the mode selection means switches to the second mode in which the air heating means and the radiant heating means are operated together, the temperature is automatically reduced by a predetermined value from the set temperature in the first mode, taking into account the radiant effect of the radiant heating means. The temperature was changed to the set temperature, and the rotation of the indoor fan became low due to the rotation in the first mode, so the user finally switched from operation of only the air heating means to combined operation of the air heating means and the radiant heating means. There is no need to change the set temperature or the air volume of the indoor fan, which simplifies operation.

Further, since this air conditioner is of a floor-standing type, if the sleep mode is set to a mode such as the second mode in which the set temperature is automatically switched, comfortable and sound sleep operation is possible, especially when going to bed.

It should be noted that it is not necessarily necessary to use a refrigeration cycle for the air heating means and the radiant heating means as in this embodiment. Instead, a heating device such as a kerosene fan heater or an electric fan heater may be used as the air heating means and separated from the radiant heating means. The same effect can be obtained by controlling the heating operation.

Similarly, as the radiant heating means, an electric heater attached to the back of the panel may be used.

In addition, in this embodiment, the first and second modes were immediately switched by turning on and off the cheap mode switch, but as shown in FIG. 9, when the sleep mode switch is on, the mode is switched to the first mode (air heating means only). However, the mode selection means may be configured to switch to the second mode after a certain period of time (for example, one hour) after the sleep mode switch is turned on. It is a block diagram.

In the figure, room temperature detection means 2 detects the indoor temperature using an indoor temperature sensor.

The temperature setting means 3 sets a set temperature.

The setting changing means 4 outputs a membrane chamber temperature signal obtained by lowering the set temperature set by the temperature setting means 3 by a predetermined value M.

The mode selection means 5 selects an air heating mode for forcing ventilation to the indoor heat exchanger and a radiant heating mode for suppressing ventilation to the indoor heat exchanger.

The first comparison means 6 outputs a comparison signal that compares the difference between the room temperature detected by the room temperature detection means 2 and the set temperature set by the temperature setting means 3.

The second comparing means 7 outputs a ratio U signal which compares the difference between the room temperature detected by the room temperature detecting means 2 and the set temperature changed by the setting changing means 4.

When the air heating mode is selected by the mode selection means 5, the control means 8 rotates the indoor fan and controls the compressor based on the comparison signal output from the first comparator P16, and the radiant heating mode is selected. , the second comparison means 7
The pressure all is controlled based on the ratio a signal outputted by.

That is, in the embodiment of the second invention, when the air heating mode is selected by the mode selection means 5, a control signal is output from the mode selection means 5 to the control means 8, and the control means 8 to which the control signal is input is The compressor is controlled by rotating the indoor fan and comparing the room temperature detected by the room temperature detection 2 with the set temperature set by the temperature setting means 3.

Next, the mode selection means 5 selects the radiant heating mode i! ! When selected, from the mode selection means 5? The l111tllll signal is output to the control means 8, and the control means 8 to which the control signal is input stops or slows down the indoor fan and sets the room temperature detected by the room temperature detection means 2 and the set temperature lowered by a predetermined value by the setting change means 4. The compressor is controlled by comparing the difference between the two.

Next, an air conditioner using the present invention will be explained.

FIG. 11 is a refrigeration cycle system diagram of an embodiment of the second invention.

In the figure, an indoor unit 20 and an outdoor unit 30 are connected via connecting pipes to form a refrigerant circulation path.

Of these, the indoor unit 20 includes an indoor heat exchanger 21, a cross-flow fan 22 that sends air to the indoor heat exchanger 21, and a radiant heat exchanger 23.
It is arranged so that there is no heat exchange with the second blower. Further, the outdoor unit 3o includes an outdoor heat exchanger 31, a propeller fan 33 that sends air to the outdoor heat exchanger 31, a compressor 32, and a refrigerant control expansion valve 35.

The external structure of the indoor unit 20 in this embodiment is the same as that shown in FIG. 3 with the three-way valve 24 removed, and that shown in FIGS. 4(a) and 4(b).

FIG. 12 is a block diagram showing the configuration of a portion particularly related to the second invention of the control section that controls this air conditioner.

In the figure, a control unit 57 includes a microcomputer, and an operation on/off switch 59 provided on a remote control device (not shown).
Signals from a sleep mode switch 58, which is a mode selection means for switching between air heating mode and radiant heating mode, and temperature setting section 26 are input, and a detection signal is input from an indoor temperature sensor 25 provided in the indoor unit. Also,
In response to these inputs to the control section 57, the control switch 55 provided between the display section 27, the fan motor 28, the AC power source 54, and the compressor 33 is controlled.

FIG. 13 is a control flowchart of the control section 57 in the configuration of the second invention.

Hereinafter, the operation of the embodiment of the second invention will be explained using this flowchart.

First, in step 110, it is determined whether the operation switch 59 is on or off, and if it is determined to be on, the process proceeds to step 113, where the set temperature TS is read, and the process proceeds to step 114, where the detection signal from the indoor temperature sensor 25 is received. Indoor temperature Ta
is read and the process proceeds to step 115, where it is determined whether the sleep mode switch 58 is on or off.

If it is determined that the sleep mode switch is off, the control device 57 outputs a normal heating operation command, and step 121
Proceeding to step 123, the indoor fan motor is driven and the indoor fan is activated.Proceeding to step 123, the set temperature Ts is compared with the temperature Ta detected by the indoor temperature sensor, and when the detected temperature Ta is lower than the set temperature Ts. The process proceeds to step 124, where the control device 57 turns on the control switch 55 to drive the compressor 33, which causes the compressor 33 to circulate the refrigerant in the direction indicated by the dashed arrow. At this time, in the indoor unit 20, since the refrigerant flows vertically to the indoor heat exchanger 21, as shown in FIG. 21 and is blown out from the suction grill 52 as warm air.

At this time, the refrigerant also flows into the radiant heat exchanger and it operates as an AA device, but since the galvanic fan is driven to ventilate the indoor heat exchanger, the heat exchanger action is performed on the indoor heat exchanger side, so the heat exchange The ratio of the amount is largely due to radiation, and there is almost no radiation effect on the radiant heat exchanger side.

That is, in a steady state (a state in which the galvanometric fan is being driven), the temperature of the radiant heat exchanger 23 does not rise to a value that provides a sufficient radiation effect.

As a result, the room is heated with warm air.

If the room temperature rises due to such operation and the temperature detected by the indoor temperature sensor 25 exceeds the set temperature, the control device 57
turns off the control switch 55 and turns off the compressor 33.
to stop. Further, when the room temperature has fallen to a certain degree, the controller 57 or the control switch 55 is turned on to restart the heating operation.

Next, when it is determined in step 115 that the sleep mode switch 58 has been turned on and a sleep operation command has been output, the process proceeds to step 116, where the control unit 57 sets the fan at a lower rotation speed than when heating using only the indoor heat exchanger (operation (including repeated shutdowns or shutdowns), the indoor fan air volume is lower than when heating using only the indoor heat exchanger.
This is because the radiant heat exchanger and the indoor heat exchanger are connected during the same cycle, so when the radiant heat exchanger is used, it is necessary to maintain the radiant heat exchanger at a high temperature. After this, the process proceeds to step 118, and the control device 57 compares the set temperature Ts, the changed temperature Tz lowered by a predetermined neighbor, and the indoor temperature Ta, and performs the changed temperature similar to the comparison control of the construction temperature Ta and the indoor temperature yITa. If 'rZ is lower than the room temperature Ta, step 119
Then, the control device 57 turns on the control switch 55 and drives the compressor 33. As a result, the compressor 33 cools down in the direction indicated by the dashed arrow! Circulate lX. At this time, in the indoor unit 20, the refrigerant flows to the indoor heat exchanger 21 and the radiant heat exchanger 23, and since the cross-flow fan 22 has a low rotation speed, the indoor heat The heat exchange action by the exchanger 21 is hardly performed, and the radiant heat exchanger 23 emits radiant heat. As a result, the room is heated with priority given to the Ili radiation effect.

)! ! When the room temperature rises due to the rotation and the temperature detected by the indoor temperature sensor 25 exceeds the change temperature Tz, the control device 57 turns off the flil control switch 55 and stops the compressor 33. Further, when the temperature drops to a certain degree, the control device 57 turns on the operation switch 55 to restart the heating operation.

In this embodiment configured as described above, when the sleep mode switch is turned on, priority is given to air heating by the indoor heat exchanger, so that normal heating operation is possible, which quickly reaches the set temperature.

In addition, when the sleep mode switch is on, the cross-flow fan is rotated at a low speed, giving priority to radiant heating using the radiant heat exchanger, heating the room with W#A heat, and lowering the temperature by a predetermined value from the set temperature. By controlling this, as shown in Figure 7, it is possible to maintain the same level of comfort as the heating operation at Uradome, even though the indoor air temperature is lowered due to the radiation effect.
As shown in Figure 8, by keeping the temperature low, the relative humidity can be kept high.

Therefore, in this mode, the thirst caused by heating is eliminated, and it is possible to drive for long periods of time and sleep comfortably while sleeping.

In addition, the mode selection means can rotate the cross-current fan in the air heating mode, give priority to heating by the indoor heat exchanger, and operate the heating operation so that the indoor temperature is the same as the set temperature. When switched to the radiant heating mode that prioritizes radiant heating using the radiant heat exchanger that suppresses the flow to the indoor heat exchanger at low rotation speeds,
The set temperature is automatically changed from the set temperature in air heating mode to a predetermined lower temperature in consideration of radiation effects, and the rotation speed of the indoor fan is lowered when in air heating mode. When switching from air heating and cooling operation to radiant heating operation, the same level of comfort can be obtained without changing the set temperature and the air volume of the indoor fan, and the operation can be simplified.

Furthermore, since this air 118I device is a floor-standing type, if it is set to a low printing mode that automatically switches the set temperature, such as a radiant heating mode, it is possible to have a comfortable and restful night's sleep, especially when sleeping.

In addition, in this embodiment, the air heating mode and the radiant heating mode were instantly switched by turning on and off the sleep mode switch, but as shown in Fig. 14, when the sleep mode switch was turned on, the air heating mode (indoor fan was turned on) ), and the mode selection means may be configured to switch to radiant heating mode (turning off the indoor fan) after a certain period of time (for example, one hour) after the sleep mode switch is turned on.

(L', work margin) (Effects of the invention) According to the first and second inventions, when switching from normal air heating operation to radiant heating operation, the set temperature is automatically lowered by a predetermined value and operation is performed. In addition to being simple, it maintains the same level of comfort as normal heating operation, and there is less discomfort due to thirst even when the relative humidity is kept high while sleeping or when heating is performed for a long time. Heating operation is possible.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of the first invention,
FIG. 2 is a refrigeration cycle system diagram in an embodiment of the present invention.
FIG. 3 is a partially cutaway perspective view of the indoor unit of the air conditioner according to the embodiment of the present invention. FIG. 4(a) is an explanatory diagram showing the flow of air when the indoor unit is operated for heating. FIG. 4(b) is an explanatory diagram showing the flow of air when the indoor unit is operated for cooling, and FIG. 5 is an explanatory diagram showing the air flow in the embodiment of the first invention. Of these, FIG. 6 is a block diagram showing the configuration of parts particularly related to the present invention, and FIG. 7 is a control flowchart in the same embodiment, and FIG. 7 is a block diagram showing the configuration of parts particularly related to the present invention.
Figure 8 is a graph showing the relationship between room temperature and relative temperature; Figure 9 is a graph showing the relationship between two temperatures. Figure 9 shows air heating means and radiant heating means in the embodiment of the first invention Figure 10 is a time chart showing the on/off status and set temperature of each.
FIG. 11 is a block diagram of a refrigeration cycle system diagram in an embodiment of the second invention; FIG. 12 is a control unit for controlling an air conditioner in an embodiment of the second invention. Of these, FIG. 13 is a block diagram showing the configuration of parts particularly related to the present invention, and FIG. 14 is a flowchart of control in the same embodiment. FIG. This is a time chart showing the on/off state of the indoor fan in response to mode switching and the set temperature. IA: Air heating means, IB: Radiant heating means 2.
... Room temperature measuring means, 3... Temperature setting means, 4... Setting changing means, 5... Mode selection means, 6... First comparison means, 7... Second comparison means, 8. ...control means,

Claims (2)

[Claims] (1) (a) Air heating means for heating the indoor air by raising the temperature of the air; (b) radiant heating means for heating using radiant heat; (c) a first mode of only the air heating means; and heating means; mode selection means for selecting a second mode of heating by the radiant heating means; (d) room temperature detection means for detecting indoor temperature with an indoor temperature sensor; and (e) temperature setting means for setting a set temperature. and (f) a first comparing means for outputting a comparison signal comparing the difference between the room temperature detected by the room temperature detection means and the set temperature set by the temperature setting means; and (g) by the temperature setting means. (h) a setting changing device for lowering the set temperature by a predetermined value; and (h) a device for outputting a comparison signal comparing the difference between the indoor temperature detected by the room temperature detecting device and the setting temperature changed by the setting changing device. two comparison means; (i) when the first mode is selected by the mode selection means, the operation of the air heating means is controlled based on the comparison signal output by the first comparison means, and the second mode is selected; and control means for controlling the operation of the air heating means based on the comparison signal output by the second comparison means when the second comparison means (2) (a) A refrigeration cycle in which a compressor, a radiant heat exchanger, an indoor heat exchanger, an expansion valve, and an indoor heat exchanger are sequentially connected by refrigerant piping; (b) an indoor fan that ventilates the indoor heat exchanger; c) mode selection means for selecting an air heating mode for forcing ventilation to the indoor heat exchanger and a radiant heating mode for suppressing ventilation to the indoor heat exchanger; and (d) detecting the indoor temperature with an indoor temperature sensor. (e) a setting means for setting a set temperature; and (f) a comparison signal that compares the difference between the room temperature detected by the room temperature detection means and the set temperature set by the temperature setting means. (g) setting changing means for lowering the set temperature set by the temperature setting means by a predetermined value; and (h) changing the indoor temperature detected by the temperature setting means and the setting changing means. (i) when the air heating mode is selected by the mode selection means, a comparison signal outputted by the first comparison means; and control means for controlling the compressor based on the comparison signal output by the second comparison means when the radiant heating mode is selected.