JP2003322363A - Air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner securing comfort regarding air conditioning by enhancing the efficiency of heat transfer regardless of the magnitude and difference of load conditions, while being unaffected by structures, layout and the like in a room to be air-conditioned. <P>SOLUTION: For the air conditioner having a heat-pump type refrigerating cycle circuit K, its indoor equipment comprises a first indoor unit 2A to be installed at a high position indoors, and a second indoor unit 2B to be disposed at a low position indoors. The first indoor unit provides a forced convection type heat exchange action to a first indoor heat exchanger 10. The second indoor unit has on its front side a radiation panel 13 for radiating indoors the heat emitted from a second indoor heat exchanger 12, and has an air passage 17 which admits indoor air for heat exchange with the indoor heat exchangers and causes the air to circulate indoors through natural convection. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner including an outdoor unit and an indoor unit, and more particularly to improvement of the indoor unit.

[0002]

2. Description of the Related Art As an air conditioner, a separation type air conditioner composed of an outdoor unit and an indoor unit is often used. In particular, the indoor unit is attached to an indoor high place such as the upper wall surface or ceiling surface of the room to be conditioned, and houses the indoor heat exchanger and the blower therein. The refrigerant is guided to the indoor heat exchanger, and the blower is driven to allow the indoor air to flow through the indoor heat exchanger to exchange heat with the refrigerant. The heat exchange air is blown into the room again,
Heating operation or cooling operation is performed.

In this way, the warm air is blown from a high place in the room during the heating operation, but in order to blow the warm air uniformly to all floors in the room, it is necessary to set a large air volume. In addition, not only is the blower increased in size, but also blown noise is increased. Further, if the amount of air blown is limited to reduce air blow noise, it becomes impossible to sufficiently warm the entire floor surface. In particular, when there is a sofa or a table in the room, warm air does not reach the leeward side of these, or it becomes difficult to warm up because of the delay. Furthermore, regardless of the amount of air blown, since the air is warm, it easily accumulates in high places near the ceiling, and it is extremely difficult to heat the room to a substantially uniform temperature.

[0004]

In order to solve such a problem, an electric carpet, an electric heat source wall panel, a hot water heat source wall panel, etc. are often used in combination with the above-mentioned air conditioner. . However, even if the above-mentioned electric carpet is used, it is not possible to uniformly heat the entire room, and the electricity bill is increased more than the combined effect thereof. And of course, the air conditioner and electric carpet must be operated and controlled separately,
It will be troublesome.

In the electric heat source wall surface panel, the electricity consumption is extremely large, and the electricity bill is higher than that of the electric carpet. The hot water heat source wall panel requires a hot water generator such as kerosene or gas, which causes a problem that the cost for purchasing the device is high and the durability is low. Also, a so-called hot water type panel convector (convection type heater) that uses both an air conditioner and a heat exchange unit for hot water.
May be used. In this device, the temperature of the panel convector is lowered.

Therefore, although it is necessary to increase the heat dissipation area of the panel convector, there is a risk of conflicting with the restriction of the installation space in the room, and the heat exchange unit becomes large in size, leading to an increase in cost. The present invention has been made in view of the above circumstances, and its purpose is to be affected by the structure and layout of the room to be conditioned, regardless of the size of load conditions and the difference of load conditions. The present invention aims to provide an air conditioner that improves heat exchange efficiency and secures air-conditioning comfort without using the air conditioner.

[0007]

In order to solve the above problems and achieve the object, the present invention provides an outdoor unit including a compressor, an outdoor heat exchanger, an expansion device and a switching valve, and an indoor heat exchanger. An air conditioner comprising a heat pump type refrigeration cycle circuit that is composed of an indoor unit provided with the indoor unit and the outdoor unit connected via a refrigerant pipe or the like and is capable of switching between heating operation and cooling operation. The indoor unit is connected to a first indoor unit that is mounted at an indoor high place such as an upper part of a wall surface or a ceiling in the room, and is connected to the first indoor unit via a refrigerant pipe or the like, and is on or near the indoor floor surface. And a second indoor unit arranged at a low place in the room, wherein the first indoor unit is a forced convection type that sucks indoor air, conducts it to an indoor heat exchanger, exchanges heat, and then blows it out indoors again. The second indoor unit has a heat exchange function of Equipped with a radiation plate that radiates the heat generated from the heat exchanger to the room, it also has a ventilation path that takes in indoor air inside and exchanges heat with the indoor heat exchanger, and naturally circulates the heat-exchanged air indoors. .

Further, the refrigeration cycle circuit guides the refrigerant compressed by the compressor of the outdoor unit to the indoor heat exchangers of the first indoor unit and the second indoor unit to condense the refrigerant, and then the first indoor unit And the second indoor unit perform heating function. further,
The refrigeration cycle circuit guides the refrigerant compressed by the compressor of the outdoor unit to only the indoor heat exchanger of the first indoor unit to evaporate it, and performs the cooling function only by the first indoor unit.

Further, the refrigeration cycle circuit guides the refrigerant compressed by the compressor of the outdoor unit to the indoor heat exchanger of the second indoor unit to condense it, and further transfers the refrigerant to the indoor heat of the first indoor unit. Dehumidifying action that leads to the exchanger to evaporate. Further, the refrigeration cycle circuit is a check valve for circulating / stopping the flow of the refrigerant to the second indoor heat exchanger when the heating operation is switched to the cooling operation or when the cooling operation is switched to the heating operation. Equipped with. Further, the outdoor unit includes a power supply device that variably controls the frequency with an inverter, and the compressor is driven by the power supply device. Further, the second indoor unit was equipped with a humidifying dish for storing warm water for humidification. Further, each of the plurality of air-conditioned rooms is provided with at least the second indoor unit.

Further, an auxiliary heat exchanger is provided in parallel with the first and second indoor heat exchangers, and this auxiliary heat exchanger is
It is immersed in warm water in a warm water tank, and a warm water circulation circuit that circulates warm water through this warm water tank and a warm water pipe is configured.
The hot water circulation circuit is provided with a hot water type auxiliary indoor unit arranged indoors. By providing such means,
Heat exchange efficiency is improved and air conditioning comfort is ensured regardless of the load conditions, the difference in load conditions, and the influence of the structure and layout of the air-conditioned room.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Note that FIG. 1 is a diagram schematically showing the overall configuration of an air conditioner installed in a house, and FIG.
Showing the configuration of the indoor unit of FIG. 3, FIG. 3 is a diagram schematically showing the configuration of the air conditioner and the refrigeration cycle circuit, FIG. 4 is a layout diagram of a house equipped with the air conditioner, and FIG. 5 is a refrigerant of the air conditioner. It is a figure explaining a system and a hot water system.

The overall structure of the air conditioner of FIG. 1 will be described. This air conditioner is an outdoor unit 1 installed outdoors.
And an indoor unit 2 that is installed in the air-conditioned room and is connected via a refrigerant pipe and electric wiring. The indoor unit 2 includes a first indoor unit 2A attached to an indoor high place that is an upper portion of the wall surface 3a in the room, and a second indoor unit 2B that is disposed at an indoor low place that is a lower portion of the wall surface 3a. . The first indoor unit 2A and the second indoor unit 2B are connected via a refrigerant pipe, electric wiring, and the like.

The first indoor unit 2A may be a ceiling-embedded type that is mounted on the ceiling.
The indoor unit 2B may be a floor-standing type that is directly placed on the floor surface 3b. Next, the details of the outdoor unit 1 and the indoor unit 2 will be described with reference to FIG. The outdoor unit 1 includes a compressor 5 and a four-way switching valve 6 inside the main body 4.
And an outdoor heat exchanger 7 and an electronic automatic expansion valve (hereinafter referred to as an expansion valve) 8 that is an expansion device, and these components are connected to each other via a refrigerant pipe P.

Further, an outdoor blower is housed inside the outdoor unit main body 4 so as to face the outdoor heat exchanger 7, and a suction port for introducing and guiding outside air is opened on the back side of the outdoor unit main body, and the main body is on the front side. A blow-out opening for guiding blow-out from the inside to the outside is opened. The first indoor unit 2A (not shown above) includes the first indoor heat exchanger 10 inside the main body 9 thereof, and each of the compressors 5 in the outdoor unit main body 4 and the like. The components and the refrigerant pipe P are connected as described later.

An indoor blower is housed so as to face the first indoor heat exchanger 10, an intake port for introducing and guiding indoor air is opened on the front surface of the indoor unit main body, and blown into the room from the inside of the main body at the lower front surface. An outlet is provided for guidance. (that's all,
The second indoor unit 2B has a second indoor heat exchanger 12 housed inside a main body 11 thereof, as shown in FIG. This second indoor heat exchanger 12 is
Each component in the outdoor unit 1 and the first indoor unit 2
It is connected to the first indoor heat exchanger 10 in A via a refrigerant pipe P as described later.

The entire front surface of the main body 11 is composed of a radiation plate 13 which is made of a material having a very good heat transfer coefficient. The second indoor heat exchanger 12 is arranged in contact with the inner surface of the radiation plate 13. The radiation plate 1
For example, a towel rack 14 is attached to the front surface of the sheet 3 directly or through a necessary attachment tool. The towel rack 14 can be literally hung on the towel T, or can be hung on clothes or the like.

Inside air circulation ports 15 and 16 in which grills are fitted are opened on the bottom surface and the top surface of the main body 11, respectively. In particular, the inside air circulation port 15 on the bottom surface side needs to have a certain gap with the floor surface 3b. The presence of the inside air circulation ports 15 and 16 forms the ventilation passage 17 in the main body 11 through which the indoor air flows. Further, a humidifying dish 18 is provided on the upper surface of the main body 11 in parallel with the inside air circulation port 16. Water is stored in the humidifying dish 18 in the dry season such as winter, and heated by the heating action described later,
And can be evaporated.

Next, referring again to FIG. 3, the refrigeration cycle circuit K, which is a piping system, will be described. One port of the four-way switching valve 6 is connected to the refrigerant pipe P connected to the discharge part a of the compressor 5. The other port of the four-way switching valve 6 is connected to the outdoor heat exchanger 7 via the refrigerant pipe P. Further, the other port of the four-way switching valve 6 has a refrigerant pipe P.
The refrigerant pipe P which is communicated with the suction part b of the compressor 5 via the and is connected to the remaining port is extended to the second indoor unit 2B. The refrigerant pipe P connecting the outdoor heat exchanger 7 and the expansion valve 8 is the first in the first indoor unit 2A.
To the indoor heat exchanger 10.

On the other hand, the second indoor heat exchanger 12 in the second indoor unit 2A has a parallel circuit 22 of the on-off valve 20 and the auxiliary capillary 21 and the first check valve 23 at one end thereof.
Are connected in series. Further, a second check valve 24 whose check direction is opposite to that of the first check valve 23 is connected to the other end of the second indoor heat exchanger 12. Refrigerant pipe P connecting one end of the first and second check valves 23, 24
And the refrigerant pipe P extending from the port of the four-way switching valve 6 is connected to this confluence point. In addition, a refrigerant pipe P communicating with the first indoor heat exchanger 10 is connected between the parallel circuit 22 and the first check valve 23.

Next, the arrangement of air conditioners for the house layout shown in FIG. 4 will be described. The second indoor unit 2B is provided in each of the Japanese-style room R1 and the Western-style room R2 adjacent to it.
Are placed. In the so-called living room R3, the first indoor unit 2
A and the second indoor unit 2B are arranged. The outdoor unit 1 is arranged outdoors, and is connected to each of the indoor units 2A and 2B via a refrigerant pipe P or the like.

In the washroom S1 and the toilet S2,
A warm water type auxiliary indoor unit 26 is arranged. The related configuration of the hot water type auxiliary indoor unit 26 and the refrigeration cycle circuit K is as shown in FIG. Here, one outdoor heat exchanger 2A is provided for the outdoor unit 1, a plurality of second indoor heat exchangers 2B are connected in parallel, and a heat pump type refrigeration cycle circuit K is configured. It Further, an auxiliary heat exchanger 27 is connected in parallel with the second indoor heat exchanger 2B, and this auxiliary heat exchanger 27 is housed in a hot water tank 28. A pump 29 that circulates the hot water in the hot water tank and a hot water circulation circuit 30 that connects the hot water type auxiliary indoor unit 26 via a hot water pipe N are connected to the hot water tank 28. A heat exchange unit U is constructed.

Next, the operation of the air conditioner thus constructed will be described. When the heating operation mode is selected from the remote control panel (not shown), the compressor 5 shown in FIG. 3 is driven, and the compressed high-temperature and high-pressure refrigerant gas flows through the four-way switching valve 6 as shown by the solid line arrow in FIG. Guided to the indoor unit 2B. Then, it is guided to the second indoor heat exchanger 12 via the second check valve 24, condensed and liquefied, and the heat of condensation is released.

The radiant plate 13 is heated by the condensation heat released from the second indoor heat exchanger 12, and the radiant heat is radiated into the room from this radiant plate. That is, a heating effect for a low indoor area can be obtained. Further, by hanging the towel T or the like on the towel rack 14, the towel rack 14 receives the radiant heat and is quickly dried. Further, the cold air floating on the floor surface 3b naturally becomes the second indoor unit 2
From the inside air circulation port 15 opening at the bottom of the main body 11 of B, the main body 1
1 and is guided along the ventilation path 17. On the way, the second indoor heat exchanger 12 is contacted and heated, and changes into warm air and rises from the inside air circulation port 16 on the upper surface of the main body 11 into the room.

Always the inside air circulation ports 15 and 16 and the ventilation passage 1
7 is present and the condensation heat is always dissipated from the second indoor heat exchanger 12, so that the ventilation passage 1 in the second indoor unit 2B is
The natural convection circulation action that warm air circulates in 7 can be obtained. On the other hand, the refrigerant discharged from the second indoor heat exchanger 12 is still a gas refrigerant, and exits from the second indoor unit 2B via the opening / closing valve 20 of the parallel circuit 22 to the first indoor unit 2A. Be guided. In the first heat exchanger 10, the refrigerant further condenses to release heat of condensation.

Simultaneously with the start of the heating operation, the blower housed in the first indoor unit 2A is being driven, and the indoor air is supplied to the main body 9
It is sucked in and is guided to the first indoor heat exchanger 10 to exchange heat. The room air changes into warm air and is blown out from the outlet. The warm air blown from here is blown toward the floor surface 3b, and the warm air rarely accumulates near the ceiling. In this way, in the first indoor unit 2A, the heating action is performed by forcibly circulating the indoor air.

Moreover, since a part of the warm air that circulates by natural convection is sucked into the first indoor unit 2A via the second indoor unit 2B, the load condition in the first indoor unit is the normal second. It is alleviated compared to an air conditioner that does not have an indoor unit. All the refrigerant is condensed and liquefied in the state where it is led out from the first indoor heat exchanger 10, and is led into the outdoor unit 1. Here, the expansion valve 8 adiabatically expands, the outdoor heat exchanger 7 evaporates, and the four-way switching valve 6 sucks and compresses the compressor 5. Then, the above refrigeration cycle is repeated.

The auxiliary heat exchanger 2 described above with reference to FIG.
7 heats the hot water in the hot water tank 28, and the hot water is controlled to maintain a predetermined temperature. By driving the pump 29, hot water of a predetermined temperature circulates in the hot water circulation circuit 30,
As described in FIG. 4, the toilet S1 and the toilet S2 are heated. The hot water in the humidifying dish 18 is heated by the heat released from the second indoor heat exchanger 12 and evaporated. Therefore, an increase in indoor humidity can be obtained, which helps prevent dryness.

When the cooling operation mode is selected, the four-way switching valve 6 switches and the high-temperature and high-pressure refrigerant gas discharged from the compressor 1 is guided to the outdoor heat exchanger 7 as shown by the broken line arrow in FIG. The gas refrigerant is condensed and liquefied in the outdoor heat exchanger 7, and further guided to the expansion valve 8 to be adiabatically expanded. Then, it exits from the outdoor unit 1 and is guided to the first indoor unit 2A, where it is evaporated in the first indoor heat exchanger 10. A blower driven at the same time draws indoor air into the main body 9 to generate the first indoor heat exchanger 10
To heat exchange. The room air turns into cold air and is blown out into the room to perform a cooling function.

The evaporative refrigerant derived from the first indoor heat exchanger 10 is once introduced to the second indoor unit 2B. By setting the orientations of the parallel circuit 22 and the first check valve 23 provided at one end of the second indoor heat exchanger 12 and the orientation of the second check valve 24 provided at the other end, the evaporative refrigerant Is the second indoor unit 2B without flowing through the second indoor heat exchanger 12.
And is guided to the outdoor unit 1. Then, the evaporated refrigerant is sucked into the compressor 5 through the four-way switching valve 6 in the outdoor unit 1 and compressed again. The refrigerant gas whose temperature and pressure have been increased repeats the above refrigeration cycle.

After all, if the heating operation is selected, the heating operation is performed in both the first indoor unit 2A and the second indoor unit 2B, whereas if the cooling operation is selected, the first indoor unit is selected. Two
The cooling function is performed only by A, and the refrigerant is not guided to the second indoor unit 2B, so that the cooling function is not performed. For example, when the dehumidifying operation is selected during the rainy season, the refrigerant gas discharged from the compressor 5 is guided to the second indoor heat exchanger 12 and condensed and liquefied as in the heating operation. Radiation plate 13 for heat of condensation
The heat is transferred to the room to be released as radiant heat, and the room air guided through the air passage 17 is heated and circulated in a natural convection manner.

When switching to this dehumidifying operation mode, the on-off valve 20 forming the parallel circuit 22 in the second indoor unit 2B.
Is closed. Therefore, the refrigerant discharged from the second indoor heat exchanger 12 is guided to the auxiliary capillary 21 and adiabatically expanded. Then, based on the orientation settings of the first check valve 23 and the second check valve 24, the second check valve 23 exits from the second indoor unit 2B and is guided to the first indoor unit 2A. In the first indoor heat exchanger 10, the refrigerant evaporates and changes the indoor air into cold air.

Therefore, cold air is blown from the first indoor unit 2A, and warm air is generated in the second indoor unit 2B by radiant heat and internal air convection circulation, so that there is little change in the room temperature as a whole, and the drying action accompanying the evaporation of the refrigerant. The dehumidifying operation is performed by. Since such an air conditioner is used, it is possible to reliably increase the floor surface temperature due to radiant heat from the second indoor unit 2B and natural convection, particularly during heating operation, and further, the first indoor unit. Since warm air is blown out by 2A, the average temperature in the room can be controlled and a comfortable heating effect can be realized.

Further, since the high temperature (about 70 to 90 ° C.) refrigerant discharged from the compressor 5 is guided to the second indoor unit 2B, a sufficient amount of radiant heat can be released from the radiant plate 13 and the indoor You can obtain comfortable heat by obtaining heat from natural convection of air. In particular, the second indoor unit 2B arranged at a low place in the room warms the cold air staying in every corner of the room and directly heats it against the floor surface. As a result, the comfort of the entire room is improved compared to an air conditioner equipped with the indoor unit only at high indoor locations.

First indoor unit 2A and second indoor unit 2B
Can be installed at any location, so the temperature environment inside the room can be optimally set. In particular, since the second indoor unit 2B is arranged at a low place in the room, it can be effectively used regardless of the location such as the lower part of the window. The first indoor unit 2A and the second indoor unit 2B have an independent relationship with each other, and the first indoor unit 2
A can be combined with many second indoor units 2B and vice versa. Of course, since the first indoor unit 2A can be used alone, it is possible to construct a large number of air conditioning systems with a small number of models, and it is easy to support a wide range.

The outdoor unit 1 is provided with a power supply device 40 for variably controlling the frequency by an inverter. The power supply device 40 and the compressor 5 are electrically connected to each other to control the inverter capacity of the compressor. The air conditioning function of the capacity ratio control is realized. Then, by controlling the amount of air blown by the blower in the first indoor unit 2A, both room temperature control and capacity control ratio control can be realized at the same time, and the high heating capacity operation mainly due to forced convection and the high efficiency mainly due to radiation / natural convection. Comfort Heating can be used together. Furthermore, multi-room heating in which one air conditioner is combined with a plurality of second indoor units 2B can be realized, and hot water can be easily supplied to many places via the hot water heat exchange unit U. The arrangement of the hot water pipe is more advantageous than the arrangement of the refrigerant pipe in terms of workability and cost, and more demand is expected.

[0036]

As described above, according to the present invention, irrespective of the load condition and the difference in load condition, and without being affected by the structure or layout of the air-conditioned room,
It has the effect of improving heat exchange efficiency and ensuring air-conditioning comfort.

[Brief description of drawings]

FIG. 1 is a diagram schematically showing an overall configuration of an air conditioner attached to a house according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a second indoor unit according to the same embodiment.

FIG. 3 is a diagram schematically showing an overall configuration and a piping configuration of the air conditioner according to the same embodiment.

FIG. 4 is a layout diagram of a house including an air conditioner and a heat exchange unit for hot water according to the same embodiment.

FIG. 5 is a diagram illustrating a refrigerant system and a hot water system of the air conditioner according to the embodiment.

[Explanation of symbols] 5 ... Compressor, 7 ... Outdoor heat exchanger, 8 ... expansion valve, 6 ... four-way switching valve, 1 ... Outdoor unit, 2A ... the first indoor unit, 2B ... second indoor unit, 10 ... a first indoor heat exchanger, 12 ... A second indoor heat exchanger, 13 ... Radiant plate, 17 ... Ventilation passage, 40 ... power supply, 18 ... Humidification dish, 27 ... Auxiliary heat exchanger, 28 ... warm water tank, 30 ... Warm water circulation circuit, 26 ... Hot water type auxiliary indoor unit.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F25B 13/00 104 F25B 13/00 104 351 351 (72) Inventor Noboru Kumagaya 336 Tatehara, Fuji City, Shizuoka Prefecture Toshiba Fterms in Carrier Co., Ltd. (reference) 3L050 BC10 3L055 AA01 CA06 3L092 AA02 AA03 BA13 BA14 BA27 GA01 GA09 GA10 HA01 HA02 HA04 TA13 TA20 UA21 UA25 VA04 WA01

Claims (9)

[Claims] 1. An outdoor unit having a compressor, an outdoor heat exchanger, an expansion device and a switching valve, and an indoor unit having an indoor heat exchanger. The indoor unit and the outdoor unit are connected to each other through a refrigerant pipe or the like. In an air conditioner equipped with a heat pump type refrigeration cycle circuit capable of switching between heating operation and cooling operation, the indoor unit is installed at an indoor high place such as an upper wall or ceiling of the room. Of the indoor unit and a second indoor unit which is connected to the first indoor unit via a refrigerant pipe or the like and is arranged at a low indoor location such as on the indoor floor surface or near the floor surface. The indoor unit has a forced convection type heat exchange action that sucks indoor air, conducts it to the indoor heat exchanger, exchanges heat, and then blows it out into the room again. With a radiant plate that radiates the heat generated from the exchanger to the room An air conditioner comprising a ventilation path for taking in indoor air inside, exchanging heat with the indoor heat exchanger, and naturally circulating the heat-exchanged air indoors. 2. The refrigeration cycle circuit guides the refrigerant compressed by the compressor of the outdoor unit to each indoor heat exchanger of the first indoor unit and the second indoor unit to condense the refrigerant.
The air conditioner according to claim 1, wherein the first indoor unit and the second indoor unit perform a heating function. 3. The refrigeration cycle circuit guides the refrigerant compressed by the compressor of the outdoor unit to only the indoor heat exchanger of the first indoor unit to evaporate the refrigerant, and performs the cooling operation only by the first indoor unit. The air conditioner according to claim 1, wherein the air conditioner is formed. 4. The refrigeration cycle circuit guides the refrigerant compressed by the compressor of the outdoor unit to the indoor heat exchanger of the second indoor unit to condense it, and further the refrigerant cools the indoor heat of the first indoor unit. The air conditioner according to claim 1, wherein the air conditioner has a dehumidifying action of guiding the vapor to a exchanger and evaporating it. 5. The refrigeration cycle circuit, for switching the flow of the refrigerant to the second indoor heat exchanger with the switching from the heating operation to the cooling operation or from the cooling operation to the heating operation. The air conditioner according to claim 1, further comprising a check valve. 6. The air conditioner according to claim 1, wherein the outdoor unit includes a power supply device that variably controls the frequency with an inverter, and the compressor is driven by the power supply device. 7. The air conditioner according to claim 1, wherein the second indoor unit is provided with a humidifying tray for storing hot water for humidification. 8. The air conditioner according to claim 1, wherein each of the plurality of air-conditioned rooms is provided with at least a second indoor unit. 9. An auxiliary heat exchanger is provided in parallel with the first and second indoor heat exchangers, the auxiliary heat exchanger being immersed in hot water in a hot water tank and connected to the hot water tank. The air conditioner according to claim 1, wherein a hot water circulation circuit for circulating hot water through the hot water pipe is configured, and the hot water circulation circuit is provided with a hot water type auxiliary indoor unit arranged indoors.