JPS63113239A - Air conditioner - Google Patents

Abstract

PURPOSE:To make it possible to improve pleasantness very much by providing means to conduct hot wind, radiation room heating by operating a fan in the room during room heating operation and means to conduct radiation room heating with the indoor fan stopped to reduce the capability of a compressor. CONSTITUTION:An indoor unit B is constituted with having an indoor fan 18, a heat radiation panel 31 which is in the state of exposure in the room, and a radiation heat exchanger 16 mounted on the heat radiation panel 31. During room heating operation means to conduct hot wind, radiation room heating with the indoor fan 18 operated, and means to conduct radiation room heating with the indoor fan 18 stopped to reduce compression capability during this radiation room heating to lower than the compression capability during the hot wind, radiation room heating are provided. Accordingly it is possible to use suitably either hot wind room heating or radiation room heating and exploit fully the functions of the hot wind room eating and radiation room heating. The pleasantness can be thereby improved very much.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a heat bomb type air conditioner that enables heating operation.

(Prior Art) Some air conditioners are equipped with a heat pump type refrigeration cycle as shown in FIG. 10, and are capable of not only cooling operation but also heating operation.

In FIG. 10, 1 is a compressor, and this compressor 1 has a four-way valve 2. Outdoor heat exchanger 3. Pressure reducing device such as an expansion valve4. The indoor heat exchanger 5 and the like are successively connected to form a heat pump type refrigeration cycle. An outdoor fan 6 is arranged near the outdoor heat exchanger 3, and an indoor fan 7 is arranged near the indoor heat exchanger 5.

That is, during cooling operation, the refrigerant flows in the direction of the solid arrow shown in the figure to form a cooling cycle, and the outdoor heat exchanger 3 is converted into a condenser,
The indoor heat exchanger 5 acts as an evaporator. Then, indoor air is circulated through the indoor heat exchanger 5 by operating the indoor fan 7, and cool air is blown into the room.

During heating operation, the four-way valve 2 is switched to flow the refrigerant in the direction of the broken line arrow in the figure to form a heating cycle, and the indoor heat exchanger 5 acts as a condenser and the outdoor heat exchanger 3 acts as an evaporator. Then, by operating the indoor fan 1, indoor air is circulated through the indoor heat exchanger 5, and IJI is blown into the room.

By the way, such a heating operation using hot air is excellent in warming the entire room, but on the other hand, it has drawbacks such as giving the human body a draft feeling (uncomfortable feeling of being hit by the wind). Another drawback is that the heating sensation is weaker than, for example, a kerosene heater, which can quickly warm cold hands and feet.

So, normal temperature! In addition to heating, there are some that use radiant heating. In this system, a heat radiation panel is installed on the front of the indoor unit, and a refrigerant pipe is attached to the back side of the heat radiation panel, and the heat of the high-temperature refrigerant flowing through the refrigerant pipe is radiated into the room via the heat radiation panel. It provides special heating effects not found in hot air heating, such as being able to quickly warm hands and feet held up to the radiant panel.

However, in this case, the actual situation was that warm air heating and radiant heating were not properly differentiated, and each function could not be fully demonstrated, and there was room for improvement in terms of comfort. .

(Problems to be solved by the invention) This invention was made in view of the above circumstances.
The purpose of this is to enable appropriate use of hot air heating and radiant heating, and to make full use of the functions of hot air heating and radiant heating, thereby significantly improving comfort. Our goal is to provide an air conditioner that makes it possible.

[Structure of the invention] (Means for solving problems) Compressor, four-way valve, outdoor heat exchanger, pressure reducing device.

It has a heat pump type refrigeration cycle in which an indoor heat exchanger, a radiant heat exchanger, etc. are sequentially connected, and a heat radiant panel that has the above-mentioned in-seedling heat exchanger, radiant heat exchanger, and indoor fan, and is exposed indoors. , an indoor unit having a radiant heat exchanger attached to the heat radiant panel; a means for turning on the indoor fan to perform hot air/radiant heating during heating operation; and a means for turning off the indoor fan during heating operation. and a means for reducing the capacity of the compressor during this radiant heating compared to during JJ heating.

(Function) During heating operation, warm air/radiant heating is performed by turning on the indoor fan. On the other hand, during heating operation, radiant heating is performed by turning off the indoor fan. During this radiant heating, the capacity of the compressor is lower than during hot air/radiant heating, taking into account that the heat radiation capacity of the thermal radiant panel is small.

<Jiura Example> Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

In FIG. 3, 11 is a variable capacity compressor, and this compressor 11 has a four-way valve 12. Outdoor heat exchanger 13. A pressure reducing device such as an expansion valve 14. v internal heat exchanger 15. The radiant heat exchanger 16 and the like are successively connected to form a heat pump type refrigeration cycle. That is, during cooling operation, the refrigerant flows in the direction of the solid arrow shown in the figure to form a cooling cycle, and the outdoor heat exchanger 13
condenser, indoor heat exchanger 15 and II radiant heat exchanger 16
together act as an evaporator. Four-way valve 1 during heating operation
2, the refrigerant flows in the direction of the dashed arrow in the figure to form a heating cycle, and the radiant heat exchanger 16 and the indoor heat exchanger 15 both act as a condenser, and the outdoor heat exchanger 13 acts as an evaporator.

Therefore, an outdoor fan 17 is disposed near the outdoor heat exchanger 13, and these outdoor heat exchangers 13. Outdoor fan 17.
Compressor 11. Four-way valve 12. An outdoor unit A is configured by the expansion valve 14 and the like. Further, an indoor fan 18 is disposed near the indoor heat exchanger 15, and the indoor heat exchanger 1
A heat exchanger temperature sensor 21 is attached to the indoor heat exchanger 15.5. Indoor fan18. Radiant heat exchanger 16. The indoor unit B is constituted by the heat exchanger temperature sensor 21 and the like.

On the other hand, as shown in FIGS. 1 and 2, the indoor unit B has a metal heat radiation panel 31 on the front surface exposed indoors, which also serves as an air intake port.

It has an air outlet 32 at the bottom. Thus, in the campus unit B, a ventilation path 34 is formed by the heat insulating material 33 from the heat radiation panel 31 to the air outlet 32. In the ventilation path 34, an indoor heat exchanger (air fin tube type) 15 is arranged near the heat radiation panel 31. Further, in the ventilation path 34, an indoor fan 18 is disposed between the indoor heat exchanger 15 and the air outlet 32. A radiant heat exchanger (refrigerant pipe) 16 and a panel temperature sensor 35 are attached to the back side of the heat radiation panel 31. Note that 36 is a drain receiver.

Further, a remote control operation section 36 is led out from the lower part of the indoor unit B, and the operation section 36 is provided with a cooling/heating changeover switch 37 and a heating mode changeover switch 38. Here, the heating mode changeover switch 38 is set to a ``fan panel'' mode that executes both humidity III heating and radiant heating, and an automatic mode that automatically switches between warm air heating and radiant heating. It has various setting positions for the "panel" mode for executing the mode tJJ@.Although not shown, the operation operation section 36 is also provided with an operation start switch and a temperature setting knob.

FIG. 4 shows the control circuit.

40 is a commercial AC N source, and a control section 42 is connected to this power source 40 via a transformer 41. This control unit 42 consists of a microcomputer, its peripheral circuits, etc.
It performs overall control of the air conditioner, and has an indoor temperature sensor 43, a heat exchanger temperature sensor 21, a panel temperature sensor 35, an indoor fan motor power source 44, and a relay 45 on the outside.
．． 46, 47, power supply section 48, etc. are connected.

Thus, the indoor fan motor 18M is connected to the 'I11 source 40 through the contacts of the relay 45, the contacts of the relay 4G, and the indoor fan motor power supply section 44 in series.

Here, the indoor fan motor power supply section 44 controls the normal and applied voltages to the indoor fan motor 18M from the control section 42.
It is controlled according to the commands of

Furthermore, the four-way valve 12 is connected to the power supply 40 through the contacts of a relay 45, a contact of a relay 46, and a contact of a relay 47 in series.
is connected. Further, a power supply section 48 is connected to the power supply 40 through a contact point of a relay 45 and a contact point of a relay 46 in series. And the contact of relay 45 to electric 111fi40.

The outdoor fan motor 17M is connected through the contacts of the relay 46 and the power supply unit 48 in series. Here, power supply section 4
8 has a built-in inverter circuit and is connected to the control section 42 via a serial signal line 49, rectifying the output of the power supply 40 and converting it into a three-phase signal with a frequency and voltage according to commands from the control section 42. It converts it into AC and supplies it to the compressor motor 1M. Further, the power supply section 48 is
It has a function of controlling energization to the outdoor fan motor 17M according to commands from the control unit 42.

Next, the operation of the above configuration will be explained with reference to FIG. 5.

Turn on heating with the cooling/heating selector switch 37 of the operation unit 36.

In addition to setting the mode, heating mode selector switch 3
Step 8 sets the fan/panel mode.

Furthermore, a desired indoor temperature is set using the operation operation section 36, and an operation for starting operation is performed. Then, the relay 45°46,
47 are all excited, and the indoor fan motor power supply section 44 and the power supply section 48 are driven.

In other words, the compressor 11. Outdoor fan 17. indoor fan 18
are activated, and the four-way valve 12 is switched.

Therefore, a heating cycle is formed and the indoor heat exchanger 1
5 and a radiant heat exchanger 16 act as a condenser. Then, when the indoor fan 18 is turned on, indoor air is sucked into the indoor unit B through the gap between the heat radiation panels 31, which absorbs heat from the indoor heat exchanger 15 and rises in temperature, turning into warm air and blowing the air. It is blown into the room from the outlet 32.

In addition, the heat radiation amount of the indoor heat exchanger 15 is 3000 to 4500.
Kcal/h Pi! degree. At the same time, the heat of the high-temperature refrigerant passing through the radiant heat exchanger 16 is transmitted to the thermal radiant panel 31, and is radiated from the thermal radiant panel 31 into the room. In addition, the heat radiation amount of the indoor heat exchanger 15 is 3000 to 4500 Kc.
al /h, and the heat radiation amount of the thermal radiation panel 31 is 500 ~
It is about 1200Kcal/h.

In this way, by performing hot spring heating and tIA radiant heating at the same time, it is possible to efficiently heat the entire room, and moreover, it is possible to quickly warm the hands and feet held over the heat radiant panel 31 in the same way as with an oil stove. . This is ideal for cold winter mornings and evenings.

Then, during this warm air/radiation time, the control unit 42 takes in the temperature detected by the indoor temperature sensor 43, and the output frequency of the inverter circuit of the power supply unit 48 (hereinafter referred to as (referred to as the operating frequency), thereby controlling the capacity of compression t11.

In this case, the difference between the detected temperature and the set temperature is made proportional to the operating frequency. That is, if the difference between the detected temperature and the set temperature is large, control is performed to increase the operating frequency. If the difference between the detected temperature and the set temperature is small, control is performed to lower the operating frequency. As a result, the condensing temperature (compressor discharge gas pressure) changes as shown in FIG. At this time, the condensing temperature is detected by the heat exchanger temperature sensor 21, and the condensing temperature is measured to prevent the compressor 11 from malfunctioning if it becomes too high, or to prevent the feeling of heating from becoming too low. ℃〜
The operating frequency r! should be within the range of 60℃! l Make adjustments. Furthermore, the heat exchanger temperature sensor 21 is connected to the indoor fan 18.
It is also used for automatic speed switching: low speed when the heat exchanger temperature is low, and high speed when the heat exchanger temperature is high.

On the other hand, the cooling/heating changeover switch 37 of the operating unit 36 is used to set the ``heating'' mode, the heating mode changeover switch 38 is used to set the ``panel'' mode, and the operation is started. Then, all of the relays 45, 46 and 47 are excited, and the power supply unit 48 is driven. In addition,
(Indoor) 7 The monitor power supply section 44 is not driven. In other words, the compressor 11. and the outdoor fan 17 are activated, and the four-way valve 12 is switched. Therefore, a heating cycle is formed, and the indoor heat exchanger 15 and the radiant heat exchanger 16 act as condensers. However, since the indoor fan 18 is in the off state, the air 1111 is not blown out, and the heat from the heat radiation panel 31 is not blown out. Only heat radiation takes place.

During this radiant heating, considering that the heat radiation capacity of the thermal radiation panel 31 is small, the operating frequency is lowered to about 30 to 40 To, and the capacity of the compressor 11 is reduced. This prevents wasteful consumption of power. At the same time, the control unit 42
The temperature detected by the panel temperature sensor 35 is taken in, and the operating frequency is controlled so that the detected temperature is constant at a set value (40 to 60° C.). When the value exceeds the set value, control shifts to on/off operation of the compressor 11 in order to protect the compression R11.

However, at the start of radiant heating, the control unit 42 controls the operating frequency to be higher than normal so that the m degree of the heat radiant panel 31 quickly reaches the set value. For example, if the set value is 60°C, the operating frequency is increased until the temperature detected by the panel temperature sensor 35 is close to the set value, for example 50°C. However, even if the operating frequency is too high, the compressor 11
The operating frequency is selected to be between 60 and 80 Hz since this only reduces the efficiency of the energy generated.

This radiant heating can not only quickly warm the hands and feet, but also has a gentle 81 room that does not cause any draft or noise to the human body, making it ideal for sleeping at night or working at a desk (or studying for entrance exams).

Moreover, this 1lii tA ffJ rfJ is extremely economical because it reduces the operating frequency of the compressor 11 to prevent unnecessary power consumption as described above.

Further, when the heating mode selector switch 38 is set to the ``auto'' mode, the control unit 42 switches between the hot air/radiant heating operation and the radiant heating operation according to the elapsed time of a timer, or according to the indoor temperature sensor. Depending on the difference between the detected temperature 43 and the set humidity, for example, when the indoor temperature reaches the set temperature, only radiant heating is used, and when the indoor temperature is below the set temperature, the heating is automatically switched to warm air/radiant heating.

In addition, in the above embodiment, the case where the indoor unit B is a wall-mounted type is explained, but the same can be implemented in the case where the indoor unit B is a floor-standing type as shown in FIGS. 6 to 9. .

6 to 9, the indoor unit B has a metal heat radiation panel 51 and an operation control section 52 on the front, an air suction port 53 on the lower front, air suction ports 54 on the lower sides of both sides, and an air inlet on the top. It has an air outlet 55. Therefore, in the indoor unit B, the air suction ports 53, 54
．． A ventilation path 57 is formed from the air outlet 54 to the air outlet 55 by the heat insulating material 5G. The indoor heat exchanger 15 is arranged in the ventilation path 57 so as to face the heat radiation panel 51 at a distance. Further, in the ventilation passage 57, an indoor fan 18 is disposed between the indoor heat exchanger 15 and the air outlet 55.

Then, the radiant heat exchanger 16 and the panel temperature sensor 35 are attached to the back side of the thermal radiation panel 51. Furthermore, 58
59 is a drain receiver, and 59 is an electric circuit box.

In this case, the same ladder function is performed, except that room air is sucked in from the bottom and warm air is blown out from the top.

In addition, in the above embodiment, when starting radiant heating, the operating frequency was raised higher than usual until the temperature detected by the panel temperature sensor 35 reached a value slightly lower than the set value, but the discharge cold ts concentration of the compressor 11 was increased. A temperature sensor may be provided to detect the temperature, and the operating frequency may be increased until the detected temperature reaches a predetermined value.

Further, in the above embodiment, only the radiation of heating heat was explained, but the radiation of cooling heat is also possible.

[Effect of the invention] As described above, according to the present invention, there is provided a compressor.

Four-way valve, outdoor heat exchanger, pressure reducing device, indoor heat exchanger.

It has a heat pump type refrigeration cycle formed by sequentially communicating a radiant heat exchanger, the downward heat exchanger, an IR heat exchanger, and an indoor fan, and a heat radiant panel exposed indoors, and the heat an indoor unit comprising a radiant heat exchanger attached to a radiant panel; means for turning on the indoor fan to perform 41 radiant heating during heating operation;
A means for turning off the fan in the seedling to perform radiant heating, and a means for reducing the capacity of the compressor during radiant heating than during hot air/radiant heating are provided, so that both room heating and radiant heating can be achieved. It is possible to provide an air conditioner that makes it possible to appropriately use the 1m @ chamber and the radiation@ chamber functions, respectively, and thereby significantly improve comfort.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the internal configuration of an indoor unit in an embodiment of the present invention, Fig. 2 is an external perspective view of the embodiment, and Fig. 3 is a diagram showing the configuration of a refrigeration cycle in the embodiment.
FIG. 4 is a diagram showing the configuration of a control circuit in the same embodiment, FIG. 5 is a diagram for explaining the operation of the same embodiment, and FIG. 6 is an external perspective view of an indoor unit in another embodiment of the present invention. , Figure 7 is a side view of the interior of Figure 6, Figure 8 is a view of the interior of Figure 6 viewed from above, Figure 9 is a front view of the interior of Figure 6, FIG. 10 is a diagram showing the configuration of a refrigeration cycle in a conventional air conditioner. B...Indoor unit, 11...Variable capacity compression, 1
5... Indoor heat exchanger, 16... Radiant heat exchanger, 18
...Indoor fan, 31...Heat radiation panel, 42...
・Control unit. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 4 Figure 5

Claims (2)

[Claims] (1) A heat pump refrigeration cycle consisting of a compressor, a four-way valve, an outdoor heat exchanger, a pressure reducing device, an indoor heat exchanger, a radiant heat exchanger, etc. connected in sequence, the indoor heat exchanger, the radiant heat exchanger, and the indoor An indoor unit having a fan and a heat radiant panel exposed indoors, and a radiant heat exchanger attached to the heat radiant panel; and during heating operation, the indoor fan is turned on to provide hot air and radiant heating means for performing radiant heating by turning off the indoor fan during heating operation, and means for reducing the capacity of the compressor during radiant heating compared to during hot air/radiant heating. An air conditioner characterized by: (2) The air conditioner according to claim 1, wherein the capacity of the compressor is increased when radiant heating is started.