JPH07151420A - Air conditioner with water heater - Google Patents

Abstract

PURPOSE:To provide an air conditioner with a water heater in which capacity of a condenser can be obtained even in an unbalanced state of a cooling load and a hot water supplying load at the time of cooling and hot water supplying, a refrigerant amount to be circulated in a refrigerating cycle can be regulated and a normal operation can be obtained and which has excellent reliability, comfortableness. CONSTITUTION:The air conditioner with a water heater comprises, an outdoor unit 9 having a compressor, an outdoor heat exchanger 14, etc., a hot water supplying unit 8 having a hot water supply heat exchanger 3, a hot water supply throttle unit 5 connected in parallel with the exchanger 14, etc., indoor units 1a, 1b having an indoor heat exchanger 6a, an air conditioning throttle unit 4a, etc., an operation detector 18a for detecting an operating state of the indoor unit, a room temperature detector 16a for detecting a room temperature, a room temperature setter 17a for setting a target room temperature value. The apparatus also comprises condenser judging means 19 for judging whether the exchanger 14 is operated as a condenser in addition to the exchanger 3 or not at the time of cooling and hot water supplying based on the detected data and rated capacity, etc., of the unit 6a.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention connects an outdoor unit with an indoor unit and a water heater to supply hot water by utilizing the condensation heat of a refrigeration cycle, such as exhaust heat during indoor cooling, in addition to air conditioning. The present invention relates to an air conditioning hot water supply device.

[0002]

2. Description of the Related Art Conventionally, as an efficient use of energy, an outdoor unit, an indoor unit for air conditioning, and a water heater are connected to supply hot water by utilizing the condensation heat of a refrigeration cycle such as cooling exhaust heat. Has been developed.

For example, as shown in FIG. 5, rooms 1a, 1
b are provided with indoor heat exchangers 2a and 2b for air conditioning, respectively, and hot water supply heat exchanger 3 is provided outside the rooms 1a and 1b for hot water supply. Indoor heat exchangers 2a, 2
b are connected to the air conditioning expansion devices 4a and 4b,
A hot water supply expansion device 5 is connected to the hot water supply heat exchanger 3. Indoor heat exchangers 2a, 2b, air conditioning expansion devices 4a, 4
b is an indoor unit 6a together with an indoor fan (not shown),
6b, and the hot water supply heat exchanger 3 and the hot water supply expansion device 5 form a hot water supply device 8 together with a hot water supply water amount adjusting mechanism 7 capable of adjusting the amount of hot water supply, a hot water storage tank (not shown), and the like.

On the other hand, an outdoor unit 9 for exchanging heat with the outside air is provided outside the room, and the outdoor unit 9 is provided with a compressor 10 for compressing a refrigerant. The hot water supply heat exchanger 3 is connected to the refrigerant outlet of the compressor 10 via a hot water supply solenoid valve 11, and the refrigerant flow passage is switched via an air conditioning solenoid valve 12 between cooling and heating. The valve 13 is connected, and the four-way valve 13 is also connected to the refrigerant inlet side of the compressor 10. An outdoor expansion device 15 is connected to the outdoor heat exchanger 14, and the four-way valve 13, the outdoor heat exchanger 14, the outdoor fan (not shown), and the like constitute the outdoor unit 9 together with the compressor 10. The four-way valve 13 is connected to the indoor heat exchangers 2a and 2b and the outdoor heat exchanger 14.

In such an air conditioning and hot water supply apparatus, the air conditioner solenoid valve 12 and the hot water supply solenoid valve 11 are mutually controlled during the cooling operation or the cooling hot water supply operation, and the outdoor heat exchanger 14 is controlled.
Alternatively, the hot water supply heat exchanger 3 acts as a condenser and the indoor heat exchangers 2a, 2b act as an evaporator.

That is, during the cooling operation, the gas refrigerant that has been compressed by the compressor 10 and has become high temperature and high pressure is cooled by the solenoid valve 1 for air conditioning.
2, the four-way valve 13 is introduced into the outdoor heat exchanger 14 (in this case, the air-conditioning solenoid valve 12 is in the open state and the hot-water supply solenoid valve 11 is in the closed state), and the heat is radiated to the outdoor atmosphere to cause the liquid refrigerant. Becomes

On the other hand, at the time of cooling hot water supply, the high temperature and high pressure gas refrigerant is introduced from the compressor 10 to the hot water supply heat exchanger 3 via the hot water supply solenoid valve 11 (in this case, the air conditioning solenoid valve 12). Is a closed state, and the hot water supply solenoid valve 11 is in an open state.) Heat is radiated to the hot water to become a liquid refrigerant.

In this way, the refrigerant in the liquid state is
In the former case, further through the outdoor expansion device 15, or in the latter case, through the hot water supply expansion device 5, and thereafter,
Both of the former and the latter are decompressed by the air conditioning expansion devices 4a and 4b to become a low-temperature and low-pressure two-phase state (mixed state of liquid and gas) refrigerant which is introduced into the indoor heat exchangers 2a and 2b and the room 1a,
The air in the chamber 1b absorbs heat, returns to the gas refrigerant, is sucked into the compressor 10 and is compressed again.

By repeating such an operation, the interior of the room 1a, 1b is cooled, or the room 1a,
It is possible to supply hot water by utilizing the cooling exhaust heat in the room of 1b.

The main difference between heating and cooling is that the four-way valve 13 is switched to reverse the flow direction of the refrigerant in the indoor units 6a, 6b and the outdoor unit 14, and in the heating and hot water supply operation. In addition, the air-conditioning solenoid valve 12 and the hot-water supply solenoid valve 11 are both in the open state, and other operation contents are basically the same as in the above case.

[0011]

However, in such a configuration, when the cooling hot water supply operation is unbalanced during cooling hot water supply operation, for example, a plurality of indoor units 6a, 6b such as a multi-air conditioner are connected. During operation, the hot water supply heat exchanger 3 functioning as a condenser lacks the capacity, and as a result, the discharge pressure of the compressor 10 rises abnormally, which impairs the reliability of the compressor 10. There was a problem.

Therefore, in order to deal with such a problem, the compressor 10 is stopped for the purpose of protecting the compressor 10, or the operating frequency of the compressor 10 is lowered without stopping and the low speed rotation is performed. A method of performing protection control such as performing the above was also considered. However, even when such a protection control is activated, there is a drawback in that the cooling capacity of the indoor heat exchangers 6a and 6b is lowered, the room temperature is raised, and the comfort is impaired.

On the other hand, in order to realize an air conditioning and hot water supply system in which a plurality of indoor units 6a and 6b are connected and which is capable of heating and hot water supply operation, the heating load and the water heater in the plurality of indoor units 6a and 6b in winter Since the hot water supply load at 8 must be covered at the same time, it is necessary to connect the outdoor heat exchanger 14 larger than the indoor heat exchangers 6a and 6b and the hot water supply heat exchanger 3.

In such an air conditioning hot water supply apparatus, it is set so that a predetermined capacity can be obtained during a cooling operation using the large outdoor heat exchanger 14 as a condenser and a heating hot water supply operation in which all the heat exchangers are operated. With respect to the amount of refrigerant, only the hot-water supply heat exchanger 3 smaller than the outdoor heat exchanger 14 is used as a condenser, and only one of the indoor units 6a and 6b is operated, so that there is an excessive amount of refrigerant during cooling hot-water supply operation. ,
As a result, there is a problem that normal operation cannot be performed due to an abnormal increase in the discharge pressure of the compressor 10.

In consideration of such problems of the conventional air conditioning and hot water supply apparatus, the present invention can secure the capacity of the condenser even when the cooling load and the hot water supply load are unbalanced during the cooling and hot water supply operation.
It is an object to provide an air conditioning hot water supply device that can maintain reliability and comfort.

It is another object of the present invention to provide an air conditioning and hot water supply device which can adjust the amount of refrigerant circulating in the refrigeration cycle during the cooling and hot water supply operation and can ensure normal operation.

[0017]

The present invention according to claim 1 provides an outdoor unit having a compressor and an outdoor heat exchanger, a water heater having a hot water heat exchanger substantially connected to the compressor, and an outdoor unit. An indoor unit having an indoor heat exchanger that is substantially connected to the heat exchanger and the hot water supply heat exchanger, and an outdoor unit in addition to the hot water supply heat exchanger depending on the air conditioning load on the indoor unit side during cooling and hot water supply operation. It is an air conditioning and hot water supply apparatus provided with a condenser judging means for judging whether or not to operate the heat exchanger as a condenser.

According to the second aspect of the present invention, there is provided an operation detector for detecting an operating state of the indoor unit, a room temperature detector for detecting a room temperature of a room in which the indoor unit is installed, and a room detector for the room in which the indoor unit is installed. It is equipped with a room temperature setting device that sets the target value of room temperature, and it is determined according to the air conditioning load on the indoor unit side that the detection result of the operation detector and the room temperature detected by the room temperature detector and the room temperature set by the room temperature setting device It is an air conditioning and hot water supply device that determines whether or not the outdoor heat exchanger in addition to the hot water supply heat exchanger acts as a condenser based on the target value and the capacity of the indoor unit.

According to the third aspect of the present invention, the condenser determining means controls the opening / closing control valve for causing the outdoor heat exchanger to act as a condenser in addition to the hot water supply heat exchanger during the cooling hot water supply operation. This is an air conditioning and hot water supply device.

According to a fourth aspect of the present invention, an outdoor unit having the compressor, the outdoor heat exchanger, and the outdoor expansion device, a water heater having a hot water heat exchanger substantially connected to the compressor, and an outdoor unit. An indoor unit having an indoor heat exchanger that is substantially connected to a heat exchanger and a hot water supply heat exchanger, a discharge refrigerant pressure of the compressor, or an abnormality detector that directly or indirectly detects the discharge refrigerant temperature, It is an air conditioning and hot water supply device provided with a refrigerant amount controller that controls so that a part of the refrigerant can be stored in the outdoor heat exchanger based on the result detected by the abnormality detector during the cooling hot water supply operation.

According to a fifth aspect of the present invention, in the above-described cooling hot water supply operation, at the time of starting after the cooling hot water supply operation is started or for a certain period of time after the refrigerant is stored in the outdoor heat exchanger, the amount of hot water supply is maintained at a certain value or more. It is an air conditioning hot water supply device provided with a hot water supply amount controller.

[0022]

In the present invention, the outdoor unit has the compressor and the outdoor heat exchanger, the hot water supply unit has the hot water supply heat exchanger substantially connected to the compressor, and the indoor unit has the outdoor heat exchanger and the hot water supply unit. It has an indoor heat exchanger that is substantially connected to the heat exchanger, and the condenser determination means determines the outdoor heat in addition to the hot water supply heat exchanger according to the air conditioning load on the indoor unit side during the cooling hot water supply operation. Determine whether to act the exchanger as a condenser. Then, for example, when it is determined that the outdoor heat exchanger also needs to act as the condenser, the hot water supply heat exchanger and the outdoor heat exchanger act in parallel as the condenser, so that the discharge refrigerant pressure of the compressor is reduced. The abnormal rise is avoided, and the protective device of the compressor does not operate frequently.

[0023]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of an air conditioning and hot water supply apparatus according to an embodiment of the present invention, and the configuration will be described with reference to the same figure. The same parts as those in FIG. 5 are designated by the same reference numerals.

That is, in FIG. 1, rooms 1a and 1b are
Are provided with indoor heat exchangers 2a and 2b for air conditioning, respectively, and a hot water supply heat exchanger 3 is provided outside the rooms 1a and 1b for hot water supply. Indoor heat exchangers 2a, 2b
Are connected to air conditioning expansion devices 4a and 4b, respectively, and hot water supply heat exchanger 3 is connected to hot water supply expansion device 5.
The indoor heat exchangers 2a and 2b and the air conditioning expansion devices 4a and 4b are indoor units 6a and 6b together with an indoor fan (not shown).
The hot-water supply heat exchanger 3 and the hot-water supply expansion device 5 constitute a hot-water supply device 8 together with a hot-water supply amount adjusting mechanism 7 capable of adjusting the amount of hot-water supply, a hot-water tank (not shown), and the like.

On the other hand, an outdoor unit 9 for exchanging heat with the outside air is provided outside the room, and the outdoor unit 9 is provided with a compressor 10 for compressing a refrigerant. A hot water supply heat exchanger 3 is connected to a refrigerant outlet of the compressor 10 via a hot water supply solenoid valve 11 as an opening / closing control valve of the present invention, and an air conditioning solenoid valve 12 as an opening / closing control valve of the present invention. The four-way valve 13 that switches the flow path of the refrigerant between the cooling time and the heating time is connected via the, and the four-way valve 13 is also connected to the refrigerant inlet side of the compressor 10. An outdoor expansion device 15 is connected to the outdoor heat exchanger 14, and the four-way valve 13 and the outdoor heat exchanger 1 are connected.
4, the outdoor fan (not shown) and the like constitute the outdoor unit 9 together with the compressor 10. The four-way valve 13 is connected to the indoor heat exchangers 2a and 2b and the outdoor heat exchanger 14.

Further, a copper pipe (here, the copper pipe is represented by a thick line in the drawing) is used for connecting the above-mentioned respective constituents, and in the refrigeration cycle thus constructed. A predetermined amount of refrigerant is sealed in and sealed in.

Here, the predetermined amount is the amount of refrigerant to be filled so that the two indoor units 6a and 6b can be operated simultaneously while using the water heater 8 when heating or supplying hot water. Although the above-mentioned configuration is the same as that of the conventional example (see FIG. 5), the specific configuration of this embodiment will be described below.

That is, the room 1a, 1b is provided with room temperature detectors 16a, 16b for detecting room temperature and room temperature setters 17a, 17b for setting a room temperature target value, respectively, and the room temperature detectors 16a, 16b and room temperature setter are provided. 17a, 17b
Is electrically connected to the condenser determination means 19 together with the operation detectors 18a and 18b for detecting whether the indoor units 6a and 6b are in operation or stopped (hereinafter, the electrical circuit connection state is shown in the drawings. Represented by the dotted line above).

Further, the condenser determination means 19 is electrically connected to the air conditioning solenoid valve 12 and the hot water supply solenoid valve 11 in an electric circuit.

On the refrigerant outlet side of the compressor 10, there is provided a discharge pressure detector 20 as an abnormality detector of the present invention for detecting the discharge refrigerant pressure. This discharge pressure detector 20
Is electrically connected to a refrigerant amount regulator 21 by means of an electric circuit. The refrigerant amount regulator 21 includes an air conditioning solenoid valve 12 and a hot water supply solenoid valve 1.
1. The outdoor expansion device 15 and the startup hot water supply water amount controller 22 are electrically connected. The hot water supply amount controller 22 at startup is electrically connected to the hot water supply amount adjusting mechanism 7.

A hot water supply temperature detector 23 for detecting the hot water supply temperature is provided on the water outlet side of the hot water supply heat exchanger 3 so that the hot water supply temperature detected by the hot water supply temperature detector 23 becomes a set hot water supply temperature. A hot water supply amount controller 24 for operating the hot water supply amount adjusting mechanism 7 is provided.

The condenser determining means 19 is used for the room 1 detected by the room temperature detectors 16a and 16b during the cooling hot water supply operation.
a and 1b, and room temperature setting devices 17a and 17
Room temperature target value set in b, operation detectors 18a, 18b
It is determined whether or not the outdoor heat exchanger 14 in addition to the hot water supply heat exchanger 3 needs to act as a condenser based on the detection data such as the state (operation or stop) of the indoor units 6a and 6b detected by Judgment, and according to the judgment result, solenoid valve for air conditioning 1
Controls the open / closed state of 2.

On the other hand, the refrigerant amount controller 21 controls the air-conditioning solenoid valve 12 when the discharge pressure of the compressor 10 detected by the discharge pressure detector 20 during the cooling hot water supply operation exceeds the set discharge pressure.
Is opened for a predetermined time to store a part of the refrigerant in the outdoor heat exchanger 14.

The startup hot water supply water amount controller 22 keeps the hot water supply water amount constant for a certain period of time after starting the cooling hot water supply operation or after storing a part of the refrigerant in the outdoor heat exchanger 14 by the refrigerant amount controller 21. The hot water supply amount adjusting mechanism 7 is controlled and operated so as to maintain the value or more.

Next, the operation of this embodiment will be described with reference to FIGS.

First, during the cooling hot water supply operation, the two indoor units 6
This is an operation in the case where the capacity is insufficient only with the hot water supply heat exchanger 3 as the condenser when a and 6b are simultaneously operated.

That is, in order to perform the cooling hot water supply operation, the hot water supply solenoid valve 11 is in the "open" state and the air conditioning solenoid valve 12 is in the open state.
Is in the "closed" state, the four-way valve 13 is set so that the refrigerant inlet of the compressor 10 is connected to the indoor heat exchangers 2a, 2b, and the air conditioning throttle valves 4a, 4b of the indoor unit are both in the "open" state. Is set to a predetermined opening. Then, only the hot water supply heat exchanger 3 is caused to act as a condenser, and the cooling hot water supply operation is started.

The condenser determining means 19 is for the indoor units 6a, 6
The approximate air conditioning load at b is calculated at predetermined time intervals, for example as follows.

Air conditioning load of each indoor unit = (room temperature-room temperature target value) x indoor unit rated capacity x operating state coefficient Here, the operating state coefficient is the operation detector 18 for each indoor unit 6a, 6b.
It is set to 1 when the driving states detected by a and 18b are "driving", and set to 0 when it is "stopped".

Next, each indoor unit 6a calculated as described above,
The air conditioning load in 6b is summed up to make the total air conditioning load. If the condenser determination unit 19 determines that the total air conditioning load calculated in this way is equal to or greater than the preset total air conditioning load upper limit value, the hot water supply solenoid valve 11 and the air conditioning solenoid valve 1 are determined.
Issue a control instruction to put both 2 into the "open" state,
The hot water supply heat exchanger 3 and the outdoor heat exchanger 14 are operated in parallel as a condenser to increase the capacity of the condenser. The flow of the refrigerant in this case is shown in FIG.

If the condenser determination means 19 determines that the preset total air conditioning load is less than or equal to the total air conditioning load upper limit value, the hot water supply solenoid valve 11 is in the "open" state and the air conditioning solenoid valve 12 is in the open state. Issue a control instruction to "close" the
Only the hot water supply heat exchanger 3 acts as a condenser. The flow of the refrigerant in this case is shown by an arrow B in FIG.

In this way, for example, the indoor units 6a, 6
Even when two b are operated at the same time to increase the cooling load and become unbalanced with the hot water supply load, in addition to the hot water supply heat exchanger 3, the outdoor heat exchanger 14 acts as a condenser in parallel. As a result, the capacity required as a condenser is secured.

As a result, an abnormal increase in the discharge pressure of the compressor 10 can be prevented, the reliability of the compressor 10 can be ensured, and it is not necessary to activate the protection control such as lowering the operating frequency of the compressor 10. For example, the room temperature of the rooms 1a and 1b can be maintained at the room temperature target value while the hot water is supplied by utilizing the exhaust heat from the cooling, so that the comfort can be maintained.

Next, regarding the same embodiment, in the case of the refrigerating cycle when only one of the two indoor units 6a and 6b is operated during the cooling hot water supply operation, the state that the amount of refrigerant is too large occurs. The operation will be described with reference to FIG. Here, FIG. 4 is an explanatory diagram showing the flow of the refrigerant by an arrow C in the case where an excessive refrigerant state occurs during the cooling hot water supply operation.

That is, in order to perform the cooling hot water supply operation, the hot water supply solenoid valve 11 is in the "open" state and the air conditioning solenoid valve 12 is in the open state.
Is in the "closed" state, and the four-way valve 13 is set so that the refrigerant inlet of the compressor 10 is connected to the indoor heat exchangers 2a and 2b, and unlike the conditions of the above description of operation, air conditioning of one of the indoor units is performed. The throttle valve 4a for use is set to a predetermined opening in the "open" state,
The other air conditioning throttle valve 4b is set to the "closed" state. Then, only the hot water supply heat exchanger 3 is made to act as a condenser, and the cooling hot water supply operation is activated so that only the indoor unit 6a operates.

In this way, when the cooling hot water supply operation is started, the startup hot water supply water amount controller 22 has a built-in timer function to introduce hot water supply to the hot water supply heat exchanger 3 for a predetermined time or more. Operate the hot water supply amount adjustment mechanism 7,
Since the hot-water supply heat exchanger 3 is supplied with hot-water supply at a constant flow rate or more, a certain amount or more of heat-exchange capacity of the hot-water supply heat exchanger 3 is secured, and a rapid increase in discharge pressure is avoided.

However, when an excessive refrigerant state occurs in the refrigeration cycle, the discharge pressure of the compressor 10 rises. The discharge pressure detector 20 detects the increase in the discharge pressure.

When the discharge pressure thus detected is equal to or higher than the set pressure, the refrigerant amount adjuster 21 causes the outdoor expansion device 1 to operate.
After performing the "fully closed" operation of 5, the air conditioning solenoid valve 12 is kept in the "opened" state for a predetermined time to store a part of the refrigerant inside the outdoor outdoor heat exchanger 14.

Further, at this time, the hot water supply amount controller 22 at startup
Resets the built-in timer and operates the hot water supply amount adjusting mechanism 7 again so that the hot water supply water having a constant flow rate or more is introduced into the hot water supply heat exchanger 3 for a predetermined time. Therefore, since hot water of a fixed flow rate or more is introduced into the hot water supply heat exchanger 3 again, a certain amount or more of heat exchange capacity of the hot water supply heat exchanger 3 is secured, and a rapid increase in the discharge pressure is avoided, and it becomes unnecessary. Refrigerant storage in the outdoor heat exchanger 14 is not executed, and it is possible to prevent the refrigerant from being excessively stored in the outdoor heat exchanger 14 and circulating in the refrigeration cycle from becoming too small.

When the amount of refrigerant is properly adjusted in this way,
The discharge pressure detected by the discharge pressure detector 20 will not exceed the set pressure, and the hot water supply temperature detected by the hot water supply temperature detector 23 will be the set hot water supply after a certain time set by the hot water supply amount controller 22 at startup has elapsed. The hot water supply amount controller 24 operates the hot water supply amount adjusting mechanism 7 so as to match the temperature.

Further, from the above, the refrigerant amount adjuster 21 and the hot water supply amount controller 22 at startup adjust the amount of refrigerant even when the cooling hot water supply operation is started and the amount of refrigerant is too high to normally operate the air conditioning and hot water supply device. Can drive

As described above, the refrigerant amount controller 21, the hot water supply amount controller 22 at startup, and the like adjust the amount of refrigerant so that an appropriate amount of refrigerant circulates in the refrigeration cycle when the cooling hot water supply operation is started, Even when the hot water supply heat exchanger is smaller than the outdoor heat exchanger, the excessive refrigerant state is avoided and the discharge pressure does not rise abnormally. In addition, the outdoor heat exchanger does not excessively store the refrigerant and the amount of the refrigerant circulating in the refrigeration cycle does not become too small. Therefore, normal operation can be performed without lowering the cooling capacity and the hot water supply capacity.

The air conditioning and water heater of the present invention according to claim 1 is
In the above embodiment, the air conditioning hot water supply device capable of both cooling and heating has been described, but the present invention is not limited to this.For example, the indoor unit does not include a four-way valve etc. Even if an unbalanced condition with the hot water supply load occurs, the outdoor heat exchanger in addition to the hot water heat exchanger acts as a condenser in parallel to ensure the necessary capacity as a condenser. Any equipment may be used as long as it is a water heater.

Further, in the above embodiment, when the discharge pressure of the compressor 10 detected by the discharge pressure detector 20 during the cooling hot water supply operation exceeds the set discharge pressure, the air conditioning solenoid valve 12 is opened for a predetermined time. The case where a part of the refrigerant is stored in the outdoor heat exchanger 14 has been described, but the present invention is not limited to this, and for example, an abnormality detector that can detect the discharge refrigerant temperature instead of the discharge pressure of the compressor is provided. Of course, the open / close state of the air conditioning solenoid valve may be controlled based on the detection data of the abnormality detector so as to store a part of the refrigerant inside the outdoor heat exchanger.

Further, the abnormality detector may be provided, for example, on the refrigerant outlet side of the compressor. In short, as long as it is possible to determine an abnormal state of the refrigeration cycle, what kind of place and where It may be provided by the method.

Further, in the above embodiment, the discharge pressure detector 20 for detecting the discharge pressure of the compressor 10 is the compressor 1
The case where the pressure of the discharged refrigerant is directly detected, which is provided on the refrigerant outlet side of 0, has been described, but the invention is not limited to this.
In short, it may be provided at any place by any method as long as it can determine the abnormal state of the refrigeration cycle.

Further, the on-off control valve of the present invention, like the hot water supply solenoid valve 11 and the air conditioning solenoid valve 12 in the above embodiment,
The case of using the electromagnetic on-off valve has been described, but the invention is not limited to this. In short, any type can be used as long as it can control the opening and closing and can control the flow of the refrigerant. Of course, it may be an intermediate open / closed state other than the above.

Further, in the above embodiment, the air conditioning throttle device 4
a, 4b, hot water supply expansion device 5, outdoor expansion device 15,
The components of the refrigeration cycle such as the hot water supply solenoid valve 11, the air conditioning solenoid valve 12, and the four-way valve 13 have been described in the case of being mounted at the positions shown in FIG. 1, but the invention is not limited to this. For example, they can be installed anywhere.

[0060]

As is apparent from the above description, the present invention can secure the capacity of the condenser even when the cooling load and the hot water supply load are unbalanced during the cooling and hot water supply operation, and is more reliable than the conventional one. It has the advantage that it can maintain sex and comfort.

Further, the present invention has an advantage that the amount of the refrigerant circulating in the refrigeration cycle can be adjusted during the cooling and hot water supply operation, and the normal operation can be ensured.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an air conditioning hot water supply device according to an embodiment of the present invention.

FIG. 2 is an explanatory view for showing the flow of the refrigerant in the case where both the hot water supply solenoid valve and the air conditioning solenoid valve are in the “open” state in the embodiment.

FIG. 3 is an explanatory diagram showing the flow of the refrigerant when the hot water supply solenoid valve is in the “open” state and the air conditioning solenoid valve is in the “closed” state in the embodiment.

FIG. 4 relates to the same embodiment, in the case where the hot water supply solenoid valve is set to the “open” state, the air conditioning solenoid valve is set to the “closed” state, and the air conditioning throttle valve 4b is set to the “closed” state. Explanatory diagram to show the flow

FIG. 5 is a configuration diagram of a conventional air conditioning hot water supply device.

[Explanation of symbols]

 1a, 1b Room 2a, 2b Indoor heat exchanger 3 Hot water supply heat exchanger 4a, 4b Air conditioning expansion device 5 Hot water supply expansion device 6a, 6b Indoor unit 7 Hot water supply amount adjusting mechanism 8 Hot water supply device 9 Outdoor unit 10 Compressor 11 For hot water supply Solenoid valve 12 Air-conditioning solenoid valve 13 Four-way valve 14 Outdoor heat exchanger 15 Outdoor throttling device 16a, 16b Room temperature detector 17a, 17b Room temperature setting device 18a, 18b Operation detector 19 Condenser judgment means 20 Discharge pressure detector 21 Refrigerant Volume controller 22 Hot water supply amount controller at startup 23 Hot water temperature detector 24 Hot water supply amount controller

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Yoshida 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (5)

[Claims] 1. An outdoor unit having a compressor and an outdoor heat exchanger, a water heater having a hot water supply heat exchanger substantially connected to the compressor, the outdoor heat exchanger and the hot water heat exchanger. An indoor unit having an indoor heat exchanger substantially connected,
During the cooling hot water supply operation, a condenser determination means for determining whether or not the outdoor heat exchanger in addition to the hot water supply heat exchanger acts as a condenser is provided according to the air conditioning load on the indoor unit side. An air conditioning hot water supply device characterized by the above. 2. An operation detector for detecting the operating state of the indoor unit, a room temperature detector for detecting the room temperature of the room in which the indoor unit is installed, and a target value of the room temperature of the room in which the indoor unit is installed. A room temperature setting device for setting and determining according to the air conditioning load on the indoor unit side means that the detection result of the operation detector, the room temperature detected by the room temperature detector, and the room temperature set by the room temperature setting device. 2. It is determined whether or not to operate the outdoor heat exchanger as a condenser in addition to the hot water heat exchanger based on a target value and the capacity of the indoor unit. Air conditioner hot water supply device. 3. The condenser determination means controls an opening / closing control valve for causing the outdoor heat exchanger to act as a condenser in addition to the hot water supply heat exchanger during the cooling hot water supply operation. The air conditioning and hot water supply device according to claim 1 or 2. 4. An outdoor unit having a compressor, an outdoor heat exchanger, and an outdoor expansion device, a water heater having a hot water heat exchanger substantially connected to the compressor, the outdoor heat exchanger, and the outdoor heat exchanger. An indoor unit having an indoor heat exchanger that is substantially connected to a hot water heat exchanger, an abnormality detector that directly or indirectly detects the discharge refrigerant pressure or the discharge refrigerant temperature of the compressor, and a cooling hot water supply operation In this case, the air conditioning and hot water supply device is provided with a refrigerant amount controller that controls so that a part of the refrigerant can be stored in the outdoor heat exchanger based on the result detected by the abnormality detector. 5. A hot water supply amount controller at startup for maintaining the hot water supply amount at a constant value or more for a fixed time after the cooling hot water supply operation is started or after the refrigerant is stored in the outdoor heat exchanger during the cooling hot water supply operation. The air conditioning and hot water supply device according to claim 4, wherein