JPH0571770A - Multiroom heating and cooling apparatus - Google Patents

Abstract

PURPOSE:To increase a difference in level between indoor machines by providing a control device which increases resistance of the flow valve of the indoor machine in a position where resistance owing to the liquid weight of a refrigerant is low. CONSTITUTION:At a point of time when the temperature of the outlet pipings of heat-exchangers 12a and 12b on the utilization side is increased during the initial stage of the starting of heating, a flow valve 13a installed to an indoor machine 16a located in an upper part where resistance is low starts closing operation earlier than a flow valve 13b installed to an indoor machine 16b situated to a lower part by means of controlling devices 22a and 22b. Since resistance of the flow valve 13a installed to the indoor machine 16a arranged to an upper part is increased and balanced with resistance owing to a liquid refrigerant weight by means of which the interior of a multiliquid pipe is pushed up, this constitution enables circulation of a refrigerant to the indoor machine 16b arranged to the lower part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating / cooling device separated into a heat source side refrigerant cycle and a use side refrigerant cycle.

[0002]

2. Description of the Related Art Heretofore, a refrigerant cycle of a cooling and heating apparatus which is divided into a heat source side refrigerant cycle and a use side refrigerant cycle is shown in JP-A-62-238952, and is constructed as shown in FIG. In FIG. 7, 1 is a compressor, 2 is a heat source side four-way valve, 3 is a heat source side heat exchanger, 4 is a pressure reducing device, and 5 is a first auxiliary heat exchanger, which are connected in an annular shape to form a heat source side refrigerant. Forming cycle 6. A second auxiliary heat exchanger 7 is integrally formed so as to exchange heat with the first auxiliary heat exchanger 5.

Reference numeral 8 is a refrigerant transfer device for sending out a refrigerant, 9 is a use side four-way valve, 10 is a gas-liquid mixer, and a heat source side refrigerant cycle 6, a refrigerant transfer device 8, a use side four-way valve 9 and a gas-liquid mixer. 10 is housed in the outdoor unit 11.

12a and 12b are heat exchangers on the use side, 13
a and 13b are flow valves, and these are indoor units 16a and 16b.
It is stored in. The indoor units 16a and 16b include the small liquid side connection pipe i, the small liquid side branch pipes d1 and d2, and the multiple liquid side branch pipes e1 and e.
2 and the multi-liquid side connection pipe j are connected to the outdoor unit 11.

The second auxiliary heat exchanger 7, the use side four-way valve 9, the gas-liquid mixer 10, the refrigerant transfer device 8, the use side heat exchangers 12a and 12b, the small liquid side connecting pipe i, and the small liquid side branch pipe. d
1, d2, the multi-liquid side branch pipes e1, e2, and the multi-liquid side connecting pipe j are connected in a ring shape to form a utilization side refrigerant cycle 17.

Further, 18a and 18b are cooling / warming operation command detecting means, and 21a and 21b are flow rate valve driving means, which are housed in the control devices 22a and 22b.

The operation of the cooling and heating apparatus configured as described above will be described. First, consider the case of cooling operation. When the cooling / warming operation command detecting means 18a, 18b detect the cooling operation command, the control devices 22a, 22b use the flow valve driving means 21a, 21b to set the flow valves 13a, 13b to a predetermined opening degree.

The refrigerant cycle during the cooling operation is indicated by a solid arrow in the figure. In the heat source side refrigerant cycle 6, the high-temperature high-pressure gas from the compressor 1 passes through the four-way valve 2 and radiates heat in the heat source side heat exchanger 3 to be condensed and liquefied to be decompressed in the decompression device 4 and evaporated in the first auxiliary heat exchanger 5. And passes through the heat source side four-way valve 2 and circulates to the compressor 1.

At this time, the second auxiliary heat exchanger 7 and the first auxiliary heat exchanger 5 of the use side refrigerant cycle 17 exchange heat, the gas refrigerant of the use side refrigerant cycle 17 is cooled and liquefied, and the use side four-way valve. 9, the gas is passed through the gas-liquid mixer 10, and is sent to the refrigerant transfer device 8. By this refrigerant transfer device 8, the flow valve 13a is passed through the use-side four-way valve 9, the multi-liquid side connecting pipe j, the multi-liquid side branch pipes e1 and e2. , 13b and the flow rate is adjusted by the use side heat exchanger 12
a, 12b to be cooled and endothermic vaporized, gasified and passed through the small liquid side branch pipes d1 and d2 and the small liquid side connecting pipe i
It will be circulated to the auxiliary heat exchanger 7.

Next, consider the heating operation. When the heating / warming operation command is detected by the cooling / heating operation command detecting means 18a, 18b, the control devices 22a, 22b cause the flow valve driving means 21 to operate.
The flow valves 13a and 13b are set to a predetermined opening by using a and 21b.

The refrigerant cycle during the heating operation is indicated by the broken line arrow in the figure. In the heat source side refrigerant cycle 6, the high temperature and high pressure refrigerant from the compressor 1 passes from the heat source side four-way valve 2 to the first auxiliary heat exchanger 5
Sent to and condensed to liquefy, and decompressed with decompression device 5,
The heat is absorbed and evaporated in the heat source side heat exchanger 3, and circulates to the compressor 1 through the heat source side four-way valve 2.

At this time, the second auxiliary heat exchanger 7 and the first auxiliary heat exchanger 5 of the use side refrigerant cycle 17 exchange heat, the liquid refrigerant in the use side refrigerant cycle 17 is heated and gasified, and the small amount side It passes through the connecting pipe i and the small liquid side branch pipes d1 and d2 and is sent to the use side heat exchangers 12a and 12b to be heated and radiated to radiate heat, and the flow rate is adjusted by the flow valves 13a and 13b, and the multi-liquid side branch pipes e1 and
e2, the multi-liquid side connection pipe j is sent from the gas-liquid mixer 10 to the refrigerant transfer device 8 through the use side four-way valve 9 and circulated to the second auxiliary heat exchanger 7.

[0013]

However, in the above-mentioned configuration, since the liquid refrigerant is accumulated in the lower indoor unit and the small liquid side branch pipe and the multiple liquid side branch pipe at the beginning of heating, the refrigerant transfer device is When circulating the liquid refrigerant, the resistance due to the weight of the liquid refrigerant pushing up the inside of the multi-liquid pipe becomes large.

Therefore, when the height difference between the indoor units exceeds a certain value, the refrigerant circulates only in the upper indoor unit having a small resistance, and does not circulate in the lower indoor unit, resulting in poor refrigerant circulation. Then, there was a problem that the operation of the system became impossible.

In view of the above problems, it is an object of the present invention to improve the high head performance of a system by balancing resistance using a flow valve.

[0016]

In order to solve the above problems, an air conditioner according to the present invention is provided with an outlet pipe temperature sensor for detecting the outlet pipe temperature of a heat exchanger on the use side during heating and a heat exchange on the use side during heating. Inlet pipe temperature sensor for detecting the inlet pipe temperature of the heater, cooling / warming operation command detecting means for detecting an instruction for cooling operation or heating operation, operation amount determining means for determining the operation amount of the flow valve, and driving the flow valve When the flow valve drive means and the heating / cooling operation command detection means detect a heating operation command at the time of heating start, the flow valve drive means drives the flow valve to a predetermined opening and the system starts the heating operation. When the pipe temperature detected by the outlet pipe temperature sensor reaches a predetermined temperature, the pipe temperature detected by the outlet pipe temperature sensor and the pipe temperature detected by the inlet pipe temperature sensor by the operation amount determining means. If the difference in pipe temperature is larger than a specified value, the operation amount to open the flow valve is determined, and if the difference in pipe temperature is smaller than the specified value, the operation amount to close the flow valve is determined. It is provided with a control device for driving the operated amount by the flow valve driving means.

Further, an outlet pipe temperature sensor for detecting the outlet pipe temperature of the use side heat exchanger during heating, an inlet pipe temperature sensor for detecting the inlet pipe temperature of the use side heat exchanger during heating, and a cooling operation or a heating operation. Cooling / warming operation command detecting means for detecting the command, operation amount determining means for determining the operation amount of the flow valve, flow valve driving means for driving the flow valve, and start detection for detecting the start of the compressor and the refrigerant transfer device. Means, and when the heating / cooling operation command detection means detects a heating operation command when the heating is started, the flow valve is set to a predetermined opening, and when the start detection means detects the start of the compressor and the refrigerant transfer device, the flow valve is set. Is opened by the flow valve driving means until the pipe temperature detected by the pipe temperature sensor reaches the predetermined temperature, and the outlet pipe temperature of the usage-side heat exchanger reaches the predetermined temperature. Then, when the difference between the pipe temperature detected by the outlet pipe temperature sensor and the pipe temperature detected by the inlet pipe temperature sensor by the operation amount determining means is larger than a predetermined value, the operation amount for opening the flow valve is set. When the difference between the pipe temperatures is smaller than a predetermined value, the operation amount for closing the flow valve is determined, and the flow valve drive means drives the determined operation amount.

[0018]

According to the present invention, when the temperature of the outlet pipe of the heat exchanger on the use side rises in the initial stage of heating operation, the indoor unit having the lower flow resistance valve installed in the upper indoor unit having a smaller resistance is provided. Since the closing operation starts earlier than the flow valve installed in the unit, the resistance of the flow valve installed in the indoor unit in the upper part increases and balances with the resistance due to the weight of the liquid refrigerant pushing up the multi-liquid pipe, so it is in the lower part. The refrigerant can also be circulated to the indoor unit.

Further, the resistance of the flow valve can be reduced by opening the flow valve by a predetermined value at regular time intervals until the outlet pipe temperature of the use side heat exchanger rises to a predetermined temperature at the beginning of heating. Since the speed can be improved, even if there is a large difference in height between the indoor units, the refrigerant can be quickly circulated to the indoor units located below.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A multi-room air conditioner according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a refrigerant cycle of a multi-room cooling and heating apparatus according to an embodiment of the present invention. In FIG. 1, the same components as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. 14a and 14b are outlet pipe temperature sensors for detecting the outlet pipe temperature of the use side heat exchangers 12a and 12b during heating. Reference numerals 15a and 15b are inlet pipe temperature sensors for detecting the inlet pipe temperature of the use side heat exchangers 12a and 12b during heating. 20a and 20b are flow valves 13
It is an operation amount determining means for determining the operation amounts of a and 13b.

When the heating / cooling operation command detecting means 18a, 18b detect a heating operation command at the time of starting the heating, the flow valves 13a, 22a, 22b are opened to a predetermined opening degree using the flow valve driving means 21a, 21b. 13b is driven, the system starts heating operation, and the use side heat exchanger 12 detected by the outlet pipe temperature sensors 14a and 14b
When the outlet pipe temperature of a, 12b reaches a predetermined temperature, the operation amount determining means 20a, 20b causes the outlet pipe temperature sensor 14 to operate.
When the difference between the pipe temperature detected by a and 14b and the pipe temperature detected by the inlet pipe temperature sensors 15a and 15b is larger than a predetermined value, the flow valves 13a and 13b.
Is determined, and when the difference in pipe temperature is smaller than a predetermined value, the operation amount for closing the flow valves 13a, 13b is determined, and the determined operation amount is determined by the flow valve driving means 21a, 21b. It is a control device driven by using.

With respect to the present embodiment configured as described above, the operation of the control devices 22a and 22b of the present embodiment will be described with reference to the characteristic diagram of FIG. 2 and the flow chart of FIG. Only explain.

FIG. 2 shows the relationship between the elapsed time of heating operation, the values of the outlet pipe temperature sensors 14a and 14b, and the openings of the flow valves 13a and 13b. In FIG. 2, the outlet pipe temperature rises with the passage of time, and the rise in the outlet pipe temperature of the use side heat exchanger 12b of the indoor unit 16b located in the lower portion of the use side heat exchanger 12a of the indoor unit 16a located in the upper portion. It shows that it is slower than the rise of the outlet pipe temperature.

Further, the indoor unit 16 which has detected the heating operation command
The flow valves 13a and 13b of the indoor units 16a and 16b are set to predetermined values, and the flow valve 13a of the indoor unit 16a located at the upper position first starts the closing operation with the passage of time, and then the flow valve of the indoor unit 16b located at the lower position. 13b indicates that the closing operation is started first.

In FIG. 3, STEP 1 is a determination routine of the cooling operation command / heating operation command, which is performed by the cooling / heating operation detecting means 18a, 18b. When the command is detected, the flow valves 13a and 13b are set to a predetermined initial opening. If it is a heating operation command, the process proceeds to STEP 2, and if it is a cooling operation command, the process proceeds to a cooling routine.

STEP 2 is a routine for judging whether the outlet pipe temperature has reached a predetermined value. If the outlet pipe temperature has not reached the predetermined value, STEP 2 is looped, and if the outlet pipe temperature reaches the predetermined value, STEP 3 Move to.

STEP 3 is a routine for determining the operation amounts of the flow valves 13a, 13b, and operation amount determining means 20a, 20
b. As shown in FIG. 2, the indoor units 16a and 16b that have detected the heating operation command at time A are the flow valves 13a and 13b.
Is set to a predetermined opening X, and the outlet pipe temperature has not reached the predetermined value T until time B, so STEP2 is looped and the flow valves 13a and 13b are maintained at the initial opening.

From time B to time C, the outlet pipe temperature of the use side heat exchanger 12a of the indoor unit 16a has reached the predetermined value T, so the operation amount of the flow valve 13a is determined, but the indoor unit 16b is determined.
Since the outlet piping temperature of the use side heat exchanger 12b of 1 has not reached the predetermined value T, the flow valve 13b loops STEP2 and is maintained at the initial opening, and after the time C, the flow valves 13a, 1
The movement amount of 3b is determined. Further, at the time of starting the heating, since the difference between the outlet pipe temperature and the inlet pipe temperature of the use side heat exchangers 12a and 12b is smaller than a predetermined value, the flow rate valves 13a and 13b.
Is determined and the process proceeds to STEP4.

In STEP 4, the determined flow valve 13
According to the operation amount for closing a and 13b, the flow valve 13a,
13b is operated.

As a result, the flow valve 13a of the indoor unit 12a in the position where the resistance due to the liquid weight of the refrigerant is small starts the closing operation before the flow valve 13b of the indoor unit 12b in the position where the resistance due to the liquid weight of the refrigerant is large. Will be done.

In this way, the resistance of the flow rate valve 13a of the indoor unit 16a located at a position where the resistance of liquid due to the liquid weight of the refrigerant is small is increased, so that the resistance to the indoor unit 16b located at a position where the resistance of liquid weight of the refrigerant is large is increased. Therefore, the refrigerant can be circulated to the indoor unit 12b at the position where the resistance due to the liquid weight of the refrigerant is large, and the user side refrigerant cycle can be formed to perform heating.

Next, the second embodiment will be described. In FIG. 4, 14a and 14b are outlet pipe temperature sensors for detecting the outlet pipe temperature of the use side heat exchangers 12a and 12b during heating. Reference numerals 15a and 15b are inlet pipe temperature sensors for detecting the inlet pipe temperature of the use side heat exchangers 12a and 12b during heating. 20a and 20b are flow valves 13a and 13
It is a motion amount determining means for determining the motion amount of b.

When the heating / warming operation command detecting means 18a, 18b detect the heating operation command at the time of starting the heating, the flow valves 13a, 22a, 22b are set to predetermined opening degrees by using the flow valve driving means 21a, 21b. 13b is driven, and when the activation detection means 19a, 19b detect activation of the compressor 1 and the refrigerant transfer device 8, until the outlet pipe temperature detected by the outlet pipe temperature sensor 14a, 14b reaches a predetermined temperature, the flow valve The outlet pipe temperature sensor 1 is operated by opening 13a and 13b at predetermined time intervals by a predetermined operation amount.
Use side heat exchangers 12a and 12b detected by 4a and 14b
When the outlet pipe temperature of the device reaches the predetermined temperature, the operation amount determining means 20a, 20b causes the pipe temperature detected by the outlet pipe temperature sensors 14a, 14b and the inlet pipe temperature sensor 15 to be detected.
When the difference between the pipe temperature detected by a and 15b is larger than a predetermined value, the operation amount for opening the flow valves 13a and 13b is determined. When the difference between the pipe temperatures is smaller than the predetermined value, the flow valve is opened. The operation amount for closing 13a, 13b is determined, and the determined operation amount is used as the flow valve driving means 21a, 2
It is a control device driven by using 1b.

The operation of the control devices 22a and 22b of the present embodiment configured as described above will be described with reference to the characteristic diagram of FIG. 5 and the flowchart of FIG.

FIG. 5 shows the relationship between the elapsed time of heating operation, the values of the outlet pipe temperature sensors 14a and 14b, and the openings of the flow valves 13a and 13b. In FIG. 5, the outlet pipe temperature rises with the passage of time, and the rise in the outlet pipe temperature of the use side heat exchanger 12b of the indoor unit 16b located in the lower portion of the use side heat exchanger 12a of the indoor unit 16a located in the upper portion. It shows that it is slower than the rise of the outlet pipe temperature.

Further, the indoor unit 16 which has detected the heating operation command
The flow valves 13a and 13b of a and 16b are set to predetermined values, and the compressor 1 and the refrigerant transfer device 8 are set by the start detection means.
When the start-up of the indoor unit 16a, 16b is detected,
a and 13b are opened by a predetermined value at regular time intervals, and the flow valve 13a of the indoor unit 16a located at the upper position with the passage of time.
First starts the closing operation, and then the indoor unit 16 located at the bottom
It indicates that the flow valve 13b of b has started the closing operation first.

In FIG. 6, STEP 1 is a determination routine for the cooling operation command / heating operation command, which is performed by the cooling / heating operation detecting means 18a, 18b. When the command is detected, the flow valves 13a and 13b are set to a predetermined initial opening. If it is a heating operation command, the process proceeds to STEP 2, and if it is a cooling operation command, the process proceeds to a cooling routine.

Step 2 is a routine for judging whether the compressor 1 and the refrigerant transfer device 8 are activated. If not activated, loops STEP 2 to continue activation determination, and if activation is detected, shifts to STEP 3. Also, STEP
Step 2 is performed by the activation detection means.

STEP 3 is a routine for judging whether the outlet pipe temperature has reached the predetermined value. If the outlet pipe temperature has not reached the predetermined value, the flow valve 13a,
13b is opened by a predetermined operation amount, and when the outlet pipe temperature reaches a predetermined value, the process proceeds to STEP4.

Further, in STEP 4, the flow valves 13a, 13
In the routine for determining the movement amount of b, the movement amount determining means 20
a, 20b.

As shown in FIG. 5, the indoor units 16a and 16b, which have detected the heating operation command at the time D, have the flow valves 13a and 13b.
When b is set to a predetermined opening X and the activation of the compressor and the refrigerant transfer device is detected at time E, the use side heat exchangers 12a and 12b are detected.
Since the outlet pipe temperature of has not reached the predetermined value T, STE
P2 is looped to open the flow valves 13a and 13b by a predetermined operation amount at regular intervals.

From time F to time G, the outlet pipe temperature of the use side heat exchanger 12a of the indoor unit 16a has reached the predetermined value T, so the operation amount of the flow valve 13a is determined, but the indoor unit 16b is determined.
Since the outlet pipe temperature of the use side heat exchanger 12b does not reach the predetermined value T, the flow valve 13b loops STEP2 and opens for a predetermined operation amount at regular time intervals, and after time G, the flow valve 13a, 13b Determine the amount of movement.

When the heating is started, the difference between the outlet pipe temperature and the inlet pipe temperature is smaller than the predetermined value, so the flow valve 13
The operation amount for closing a and 13b is determined, and STEP 5
Move to.

In STEP 5, the determined flow valve 13
According to the operation amount for closing a and 13b, the flow valve 13a,
13b is operated.

As a result, the flow rate valve 13a,
The flow valve 1 of the indoor unit 12a at the position where the resistance due to 13b is reduced and the resistance due to the liquid weight of the refrigerant is small
3a will start the closing operation prior to the flow valve 13b of the indoor unit 12b at the position where the resistance due to the liquid weight of the refrigerant is large.

In this way, the resistance of the flow valve 13a of the indoor unit 12a at the position where the resistance due to the liquid weight of the refrigerant is small becomes large, so that the resistance to the indoor unit 12b at the position where the resistance due to the liquid weight of the refrigerant is large. Is balanced, and the refrigerant can be circulated to the indoor unit 12b at a position where the resistance due to the liquid weight of the refrigerant is large.

Further, the circulation speed of the refrigerant is improved, and the heating side refrigerant cycle 17 can be formed in a short time so that the comfort can be obtained in a short time.

[0049]

As described above, in the multi-room cooling and heating apparatus of the present invention, the outlet pipe temperature sensor for detecting the outlet pipe temperature of the utilization side heat exchanger during heating, and the inlet pipe temperature of the utilization side heat exchanger during heating. An inlet pipe temperature sensor for detecting the cooling / heating operation command detecting means for detecting an instruction for cooling operation or heating operation, an operation amount determining means for determining the operation amount of the flow valve, a flow valve driving means for driving the flow valve, and a heating device. When the cooling / warming operation command detecting means detects the heating operation command at the time of startup, the flow valve drive means drives the flow valve to a predetermined opening, and the system starts the heating operation and the outlet pipe temperature sensor detects it. When the pipe temperature reaches a predetermined temperature, the difference between the pipe temperature detected by the outlet pipe temperature sensor and the pipe temperature detected by the inlet pipe temperature sensor by the operation amount determining means is a predetermined value. If the difference is larger than the specified value, the operation amount to open the flow valve is determined.If the difference in pipe temperature is smaller than the specified value, the operation amount to close the flow valve is determined, and the determined operation amount is driven by the flow valve. The control device is driven by the means.

Therefore, the resistance of the flow valve of the indoor unit located at the position where the resistance of the refrigerant is small becomes large, so that the resistance of the indoor unit at the position where the resistance of the refrigerant is large is balanced. The refrigerant circulation can be obtained even in the indoor unit located at a position where the resistance of the refrigerant is large due to the liquid weight, the system stop can be prevented, and the height difference between the indoor unit and the indoor unit can be further increased.

Further, an outlet pipe temperature sensor for detecting the outlet pipe temperature of the utilization side heat exchanger during heating, an inlet pipe temperature sensor for detecting the inlet pipe temperature of the utilization side heat exchanger during heating, and a cooling operation or a heating operation. The cooling / warming operation command detecting means, the operation amount determining means for determining the operation amount of the flow valve, the flow valve driving means for driving the flow valve, the start of the compressor and the refrigerant transfer device are detected, When the startup detection means and the heating / cooling operation command detection means detect the heating operation command when the heating is started, the flow valve is set to a predetermined opening, and when the startup detection means detects the startup of the compressor and the refrigerant transfer device, The flow valve driving means opens a predetermined amount at regular intervals until the pipe temperature detected by the pipe temperature sensor reaches the predetermined temperature. If the difference between the pipe temperature detected by the outlet pipe temperature sensor and the pipe temperature detected by the inlet pipe temperature sensor by the operation amount determining means is larger than a predetermined value, the operation amount for opening the flow valve. Decide
When the difference between the pipe temperatures is smaller than a predetermined value, a control device for determining an operation amount for closing the flow valve and driving the determined operation amount by the flow valve driving means is provided.

Therefore, the resistance of the flow valve of the indoor unit located at the position where the resistance of the refrigerant is small becomes large, and the resistance of the indoor unit at the position where the resistance of the refrigerant is large is balanced. , Refrigerant circulation can be obtained even to the indoor unit in the position where the resistance of the refrigerant is large due to the liquid weight, and the circulation speed of the refrigerant is improved so that the user side refrigerant cycle can be formed in a short time and the system stop can be prevented and the comfort in a short time. And the effect of increasing the height difference between the indoor units can be obtained.

[Brief description of drawings]

FIG. 1 is a refrigerant cycle diagram of an air conditioner according to a first embodiment of the present invention.

FIG. 2 is a characteristic diagram showing a correlation between an elapsed time, an outlet pipe temperature, and a flow valve opening degree in the cooling and heating apparatus of the same embodiment.

FIG. 3 is a flowchart of the cooling and heating device of the same embodiment.

FIG. 4 is a refrigerant cycle diagram of an air conditioner according to a second embodiment of the present invention.

FIG. 5 is a characteristic diagram showing a correlation between an elapsed time, an outlet pipe temperature, and a flow valve opening degree in the cooling and heating apparatus of the same embodiment.

FIG. 6 is a flowchart of the cooling and heating device of the same embodiment.

FIG. 7 is a refrigerant cycle diagram of a conventional cooling and heating device.

[Explanation of symbols]

 1 Compressor 2 Heat Source Side Four Way Valve 3 Heat Source Side Heat Exchanger 4 Pressure Reduction Device 5 First Auxiliary Heat Exchanger 6 Heat Source Side Refrigerant Cycle 7 Second Auxiliary Heat Exchanger 8 Refrigerant Transfer Device 9 Use Side Four Way Valve 12a, 12b Use Side Heat Exchanger 13a, 13b Flow valve 14a, 14b Outlet piping temperature sensor 15a, 15b Inlet piping temperature sensor 17 User side refrigerant cycle 18a, 18b Cooling / warming operation command detecting means 19a, 19b Startup detecting means 20a, 20b Operating amount determining means 21a, 21b Flow valve driving means 22a, 22b Control device

Claims (2)

[Claims] 1. A heat source side refrigerant cycle in which a compressor, a heat source side four-way valve, a heat source side heat exchanger, a pressure reducing device and a first auxiliary heat exchanger are connected in an annular shape, and the first auxiliary heat exchanger is integrated. A second auxiliary heat exchanger that forms and exchanges heat, a use-side four-way valve, a refrigerant transfer device, a flow valve that adjusts the refrigerant flow rate, and a use-side heat exchanger, and a use-side refrigerant cycle; An outlet pipe temperature sensor that detects the outlet pipe temperature of the use-side heat exchanger, an inlet pipe temperature sensor that detects the inlet pipe temperature of the use-side heat exchanger during heating, and a cooling and heating that detects an instruction for cooling operation or heating operation. When a command for heating operation is detected by the operation command detection unit, the operation amount determination unit that determines the operation amount of the flow valve, the flow valve drive unit that drives the flow valve, and the cooling / heating operation command detection unit at the time of heating startup. Flow valve drive When the flow valve is driven to a predetermined opening set in advance using a means, the system starts heating operation and the pipe temperature detected by the outlet pipe temperature sensor reaches a predetermined temperature, the operation amount determination means causes When the difference between the pipe temperature detected by the outlet pipe temperature sensor and the pipe temperature detected by the inlet pipe temperature sensor is larger than a predetermined value, the operation amount for opening the flow valve is determined, and the pipe temperature Is smaller than a predetermined value, a multi-chamber cooling / heating device configured by a control device that determines an operation amount for closing the flow valve and drives the determined operation amount using the flow valve driving means. .. 2. A heat source side refrigerant cycle in which a compressor, a heat source side four-way valve, a heat source side heat exchanger, a pressure reducing device, and a first auxiliary heat exchanger are connected annularly, and the first auxiliary heat exchanger is integrated. A second auxiliary heat exchanger that forms and exchanges heat, a use-side four-way valve, a refrigerant transfer device, a flow valve that adjusts the refrigerant flow rate, and a use-side heat exchanger, and a use-side refrigerant cycle; An outlet pipe temperature sensor that detects the outlet pipe temperature of the use-side heat exchanger, an inlet pipe temperature sensor that detects the inlet pipe temperature of the use-side heat exchanger during heating, and a cooling and heating that detects an instruction for cooling operation or heating operation. An operation command detection unit, an operation amount determination unit that determines an operation amount of the flow valve, a flow valve drive unit that drives the flow valve, a start detection unit that detects the start of the compressor and the refrigerant transfer device, The above-mentioned cooling / heating operation life when heating is started When the command for heating operation is detected by the command detecting means, the flow valve is set to a predetermined opening degree, and when the start detecting means detects the start of the compressor and the refrigerant transfer device, the flow valve is connected to the pipe. A predetermined amount is opened at regular intervals by the flow valve driving means until the pipe temperature detected by the temperature sensor reaches a predetermined temperature,
When the outlet pipe temperature of the utilization side heat exchanger reaches a predetermined temperature, the difference between the pipe temperature detected by the outlet pipe temperature sensor by the operation amount determining means and the pipe temperature detected by the inlet pipe temperature sensor is If the difference is greater than a predetermined value, the operation amount for opening the flow valve is determined, and if the difference in pipe temperature is less than the predetermined value, the operation amount for closing the flow valve is determined, and the determined operation is determined. A multi-chamber cooling and heating device configured by a control device that drives an amount by the flow valve driving means.