JPH0861743A - Air conditioner - Google Patents

Abstract

PURPOSE: To efficiently and economically air condition a wide main space and a small space which is merely temporarily used in a general household residence, etc. CONSTITUTION: A first refrigerating cycle is formed of a capacity variable type compressor 11 placed in an outdoor unit 1, a heat source side heat exchanger 13 and a first user side heat exchanger 21 placed in a first indoor unit (master unit) 2. The refrigerant circuit of a second indoor unit placed with a second user side heat exchanger 31 having smaller rated capacity than that of the exchanger 21 is so connected as to constitute a second refrigerating cycle by sharing at least the compressor 11 and the exchanger 13 of the first cycle. The maximum capacity exceeding the rated capacity of the compressor 11 is set to substantially the sum or less of the rated capacities of the exchanger 21 and the exchanger 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner used for air conditioning between a main space such as a living room in a general household and a small space such as a hallway, a corridor, a toilet or a bedroom. When using multiple indoor units in combination with one outdoor unit, by making the rated capacity of each indoor unit different, it is possible to efficiently perform air conditioning between the main space and a small space, which is economical. It is intended to improve convenience and comfort.

[0002]

2. Description of the Related Art Conventionally, in this type of air conditioner,
At present, each indoor unit is made up of a combination of those having the same capacity, or a combination of those having different capacities, and their capacity is 2 k.
Most of them use indoor units of W or higher.

[0003]

However, in the air conditioner having such a conventional structure, particularly in the combination of the indoor units, the minimum room for one indoor unit is about 4.5 tatami mats. Yes, it is uneconomical and not appropriate to air-condition a room smaller than this.

In addition to a large main space such as a living room such as a house for general households, a small space such as an entrance, a corridor, a toilet, a washroom or a changing room, a kitchen or a bedroom which is only temporarily used. Even if the air conditioning is flexible, it is effective to obtain comfortable living, but installing the air conditioner with the conventional structure as described above is not only convenient but also efficient. In addition, there was a problem that the air conditioning could not be done economically.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioner capable of efficiently and economically air-conditioning a wide main space and a small space that is only temporarily used in a residential home. To provide.

[0006]

To achieve the above object, the present invention comprises a refrigeration cycle using a variable capacity compressor, a heat source side heat exchanger, and a first utilization side heat exchanger. In the above air conditioner, a refrigerant circuit having a second usage-side heat exchanger having a rated capacity smaller than the rated capacity of the first usage-side heat exchanger is provided in at least the compressor and the heat-source-side heat in the refrigeration cycle. It is connected so as to form a refrigeration cycle in common with the exchanger, and the maximum capacity exceeding the rated capacity of the compressor is set to the rated capacity of the first usage-side heat exchanger and the rating of the second usage-side heat exchanger. It is configured so that it is less than or equal to the total sum of abilities.

[0007]

That is, the present invention is directed to a variable capacity compressor,
A second utilization-side heat exchanger having a rated capacity smaller than the rated capacity of the first utilization-side heat exchanger, while forming a refrigeration cycle using the heat source-side heat exchanger and the first utilization-side heat exchanger. Is connected to form a refrigeration cycle by sharing at least the compressor and the heat source side heat exchanger in the refrigeration cycle, and the maximum capacity exceeding the rated capacity of the compressor is set to the first utilization side heat. Since the rated capacity of the exchanger and the rated capacity of the second usage-side heat exchanger are set to be less than or equal to the total sum, the indoor unit (master unit) equipped with the first usage-side heat exchanger is installed in the living room. Installed in the main space such as the room and use the indoor unit (slave unit) equipped with the second heat exchanger on the use side only temporarily at the entrance, hallway, toilet, washroom, dressing room, kitchen, bedroom, etc. Install them in a small space and combine them to create a main space. After having performed the air conditioning of the scan, by performing air conditioning of small spaces, the pull-down characteristic of the slave unit is sufficiently secured, thereby air-conditioning the main space and a small space is efficiently and economically performed.

Further, since the operation switches of each indoor unit are collectively provided on the master unit having a large rated capacity, the operation command to the slave unit can be operated from the master unit, for example, from the main space. Before moving to a small space, it is possible to perform flexible air conditioning operation of the small space easily and improve convenience, which makes it possible to perform air conditioning in a small space efficiently and economically and improve comfort. Can be achieved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an air conditioner according to the present invention as a living room A which is a main space of a general household and a small space. This is an example of installation at entrance B.

As shown in FIG. 2, this air conditioner includes an outdoor unit 1 installed outdoors, a first indoor unit (master unit) 2 and a second indoor unit installed in a living room A and an entrance B in the room. The outdoor unit 1, the master unit 2 and the slave unit 3 are connected to each other via a distributor 4 by piping.

As shown in FIG. 3, the outdoor unit 1 includes a variable capacity compressor 11 and a four-way valve 12 for switching between cooling (solid arrow state) and heating (dotted arrow state). , A heat source side heat exchanger 13 and a control unit 15 are mounted, the main unit 2 is equipped with a first usage side heat exchanger 21 and a control unit 22, and the slave unit 3 is equipped with a second usage unit. A side heat exchanger 31 and a control unit 32 are mounted, and the respective control units 15, 22, 32 are connected by a signal line.

On the other hand, the distributor 4 includes a first decompression device 14 in the first utilization side heat exchanger 21 mounted on the base unit 2.
A first flow rate variable valve 41, which is an electromagnetic valve connected via a, and a second use side heat exchanger 31 mounted on the slave unit 3 are connected via a second pressure reducing device 14b. It is composed of a second variable flow valve 42 which is an electromagnetic valve.

The outdoor unit 1 and the main unit 2 constitute a first refrigeration cycle, and the compressor 11 and the heat source side heat exchanger 13 mounted on the outdoor unit 1 in the first refrigeration cycle Is connected to the refrigerant circuit of the slave unit 3 so as to form a second refrigeration cycle, and the rated capacity of the second usage-side heat exchanger 31 mounted on the slave unit 3 is It is set to ½ or less of the rated capacity of the first usage-side heat exchanger 21 mounted on the base unit 2.

For example, when the rated capacity of the first usage-side heat exchanger 21 is 2,500 kcal, the rated capacity of the second usage-side heat exchanger 31 is the same as that of the first usage-side heat exchanger 31. The rated capacity of the usage-side heat exchanger 21 is set to about 1,000 kcal, and the maximum capacity exceeding the rated capacity of the compressor 11 is the rating of the first usage-side heat exchanger 21. It has a configuration in which the capacity and the rated capacity of the second utilization side heat exchanger 31 are set to be substantially equal to or less than the total sum.

In addition, the control unit 22 of the master unit 2 is provided with the operation switches of the master unit 2 together with the operation switches of the slave unit 3, so that the outdoor unit 1 and the slave unit are operated by the master unit. It is possible to operate the operation command for.

That is, from the control unit 22 of the main unit 2 to the control unit 15 of the outdoor unit 1 according to the operation of the operation switches, ON / OFF of the compressor 11, the operating capacity, the four-way valve 1
The signal indicating the switching of 2 (cooling / heating) and the signal indicating the opening degree of the first flow rate variable valve 41 of the distributor 4 are transmitted. The control unit 15 of the outdoor unit 1 controls the compressor 11 based on the signal from the compressor 11.
The control of the driving capacity of the above and the opening degree control of the first flow rate variable valve 41 and the like are performed.

Further, the control unit 22 of the master unit 2 sends a signal to the control unit 32 of the slave unit 3 via a signal line, and controls the slave unit 3 by this signal, and at the same time, the outdoor unit 1 A signal is also sent to the control unit 15 of the
The degree of opening of the variable flow valve 42 is controlled.

According to the above construction, when only the master unit 2 installed in the living room A is operated, the first flow rate variable valve 41 connected to the master unit 2 is fully opened and the slave unit 3 is connected. The connected second flow rate variable valve 42 is fully closed, and the operating capacity of the compressor 11 mounted on the outdoor unit 1 is controlled based on the difference between the room temperature of the living room A and the set temperature of the master unit 2.

On the other hand, when only the slave unit 3 installed at the entrance B is operated, the first flow rate variable valve 41 is fully closed and the second flow rate variable valve 42 is fully opened, so that the front door is opened. B
The operating capacity of the compressor 11 mounted on the outdoor unit 1 is controlled on the basis of the difference between the room temperature and the set temperature of the slave unit 3.

When the master unit 2 and the slave unit 3 are simultaneously operated, the compressor 11 of the outdoor unit 1 has the total capacity of the master unit 2 and the slave unit 3. When the total capacity exceeds the maximum capacity of the compressor 11, the compressor 11 is operated at the maximum capacity, and
Depending on the exceeded capacity, the first and second variable flow valves 4
It is performed by controlling so as to narrow down 1, 42.

In this case, if the first and second variable flow valves 41 and 42 are simply open / close valves, and the operation of the slave unit 3 is stopped when the capacity exceeds the simultaneous operation, the overall construction is inexpensive. You can

By the way, in an air conditioner using such a variable capacity compressor, for example, an inverter type, the characteristics of the inverter can be utilized for its operation, and the maximum capacity is generally the rated capacity. Since it has increased from 1.2 times to 1.5 times, even if the parent machine operates at the rated capacity, the capacity of the child machine is sufficiently secured.

In the above embodiment, the outdoor unit 1
Although the parent device 2 and the child device 3 are connected to each other through the distributor 4 by pipes, as shown in FIG.
42 may be mounted, and the master unit 2 and the slave unit 3 may be directly connected to the outdoor unit 1 by piping.

Further, although the combination of the living room and the entrance has been described as an example of installing the master unit and the slave unit of the air conditioner of the present invention in a general household house, as another example, It can be used in a combination of a corridor, living room and toilet, living room and washroom, living room and dressing room, living room and kitchen, or living room and bedroom.

Further, as shown in FIG. 5, for example, one large living room A is divided by a partition wall W into a main space A1 and a small space A2, and the main space A1 and the small space A2 are divided into two spaces. If the slave unit 3 is installed in A2, the air conditioner of the present invention can be effectively used.

[0026]

As is apparent from the above description, the present invention constitutes a refrigeration cycle using a variable capacity compressor, a heat source side heat exchanger, a pressure reducing device, and a first utilization side heat exchanger. At the same time, at least the compressor and the heat source side heat exchanger in the refrigeration cycle share a refrigerant circuit having a second utilization side heat exchanger having a rated capacity smaller than that of the first utilization side heat exchanger. Connected so as to form a refrigeration cycle, and the maximum capacity exceeding the rated capacity of the compressor is less than or equal to the sum of the rated capacity of the first usage-side heat exchanger and the rated capacity of the second usage-side heat exchanger. Since it is set to
The indoor unit (parent unit) equipped with the user-side heat exchanger is installed in the main space such as the living room, and the indoor unit (child unit) equipped with the second user-side heat exchanger is installed in the entrance, hallway, and toilet. By installing and combining them in a small space such as a washroom, a dressing room, a kitchen, a bedroom, or the like which is temporarily used, it is possible to efficiently and economically air-condition the main space and the small space.

Further, after the main unit is air-conditioned in the main space and then the child unit is air-conditioned in a small space, a sufficient pull-down characteristic of the child unit can be ensured.

Further, by providing the operation switches of the respective indoor units collectively on the master unit having a large rated capacity, the operation command to the slave unit can be operated from the master unit, for example, from the main space. Before moving to a small space, the flexible air conditioning operation of the small space can be easily performed, and convenience is improved, whereby the small space can be efficiently and economically air-conditioned. It is possible to improve comfort.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an embodiment of an installation state of an air conditioner according to the present invention in a general household house.

FIG. 2 is an explanatory diagram showing a piping configuration of the air conditioner according to the present invention.

FIG. 3 is an explanatory view showing a refrigerant circuit of the air conditioner according to the present invention.

FIG. 4 is an explanatory view showing another piping configuration of the air conditioner according to the present invention.

FIG. 5 is a schematic explanatory view showing another installation state of the air conditioner according to the present invention in a general household house.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Outdoor unit, 11 ... Compressor, 12 ... Four-way valve, 13 ... Heat source side heat exchanger, 14a ... 1st decompression device, 14b ... 2nd decompression device , 15 ... control unit, 2 ... first indoor unit (parent device), 21 ... first heat exchanger on the use side, 22 ... control unit, 3 ... second indoor unit Machine (slave machine), 31 ... Second heat exchanger on the use side, 32 ... Control unit, 4 ... Distributor, 41 ... First flow rate variable valve, 42 ... Second Flow rate variable valve, A ... Main space (living room), B ... Small space (entrance).

Claims (3)

[Claims] 1. A variable capacity compressor, a heat source side heat exchanger,
An air conditioner that constitutes a refrigeration cycle using a first usage-side heat exchanger, and has a second usage-side heat exchanger having a rated capacity smaller than the rated capacity of the first usage-side heat exchanger. The refrigerant circuit is connected so that at least the compressor and the heat source side heat exchanger in the refrigeration cycle are shared so as to form a refrigeration cycle, and the maximum capacity exceeding the rated capacity of the compressor is the first utilization side heat exchange. An air conditioner characterized in that the rated capacity of the heat exchanger and the rated capacity of the second heat exchanger on the use side are set to be substantially equal to or less than the total sum. 2. The rated capacity of the second heat exchanger on the utilization side is set to the first value.
The air conditioner according to claim 1, wherein the rated capacity of the use side heat exchanger is less than or equal to 1/2. 3. The air conditioner according to claim 1, wherein the operating switches of each of the use side heat exchangers are provided so as to be aggregated in one having a larger rated capacity.