JP6248393B2 - Temperature control system - Google Patents

Description

  The present invention relates to a temperature control system.

  Conventionally, as a temperature control system, there is one provided with a heat medium circuit through which a heat medium flows, as described in JP 2009-139082 A (Patent Document 1). This heat medium circuit is provided with one outdoor heat exchanger, one compressor, one water heat exchanger, and one expansion mechanism.

  In the water heat exchanger, hot water is generated by heat exchange between the heat medium and water. By supplying this warm water to the secondary side heat exchange terminal via the thermal valve, the periphery of the secondary side heat exchange terminal can be heated.

JP 2009-139082 A

  By the way, in the said temperature control system, when the water heat exchanger is made into two or more and the change which connects a secondary side heat exchange terminal to each water heat exchanger is performed, the temperature around a certain secondary side heat exchange terminal is made high. In order to lower the ambient temperature of the other secondary side heat exchange terminal, the thermal valve connected to a certain secondary side heat exchange terminal is fully opened and the other secondary side heat exchange terminal is opened. Problems arise when the connected thermal valve is opened intermittently.

  That is, there is a problem that the temperature fluctuation of the secondary side heat exchange terminal becomes large due to intermittent flow of high-temperature hot water to the other secondary side heat exchange terminal.

  In addition, the hot water of high temperature intermittently flows in the other secondary side heat exchange terminals, and as a result of frequent start and stop of the compressor, there is a problem that the equipment efficiency is deteriorated.

  Then, the subject of this invention is providing the temperature control system which can improve apparatus efficiency while being able to reduce the temperature fluctuation of a secondary side heat exchange terminal.

In order to solve the above problems, the temperature control system of the present invention is:
An outdoor heat exchanger, a compressor, a plurality of water heat exchangers, and a heating medium circuit in which a plurality of expansion mechanisms are sequentially connected;
A plurality of secondary heat exchange terminals connected to the plurality of water heat exchangers;
A pump for sending hot water or cold water heat-exchanged with the heat medium passing through the water heat exchanger to the secondary heat exchange terminal;
A control device,
Based on the set temperature of each of the secondary side heat exchange terminals, the control device determines the size of one phase region of the heat medium in each of the water heat exchangers and 2 of the heat medium in each of the water heat exchangers. It is characterized by controlling the size of the phase range.

  According to the temperature control system having the above configuration, the heat medium exchanges heat with water in the water heat exchanger by flowing through the outdoor heat exchanger, the compressor, the water heat exchanger, and the expansion mechanism. At this time, the heat medium and water in the water heat exchanger are changed by changing the size of the one phase region of the heat medium in the water heat exchanger and the size of the two phase region of the heat medium in the water heat exchanger. The amount of heat exchange with can be changed to adjust the temperature of hot or cold water coming out of the water heat exchanger.

  Therefore, based on the set temperature of each secondary side heat exchange terminal, the control device determines the size of one phase region of the heat medium in each water heat exchanger and the two phases of the heat medium in each water heat exchanger. By controlling the size of the area, hot water or cold water corresponding to the set temperature of the secondary side heat exchange terminal can be supplied to the secondary side heat exchange terminal. As a result, the temperature fluctuation of the secondary side heat exchange terminal can be reduced.

  Moreover, since hot water or cold water according to the set temperature of the secondary side heat exchange terminal can be supplied to the secondary side heat exchange terminal, the start and stop of the compressor can be reduced, and the equipment efficiency can be improved. .

In the temperature control system of one embodiment,
The control device controls the size of two one-phase regions of the heat medium in each of the water heat exchangers and the size of one two-phase region of the heat medium in each of the water heat exchangers during heating operation. To do.

  According to the temperature control system of the above embodiment, during the heating operation, the heat medium discharged from the compressor undergoes heat exchange with water in the water heat exchanger and condenses. The condensed heat medium expands by the expansion mechanism, evaporates in the outdoor heat exchanger, absorbs heat from the outdoor heat source, and returns to the compressor. At this time, the water flowing through the water heat exchanger becomes warm water by heat exchange with the heat medium and flows toward the secondary heat exchanger.

  Thus, when the water in the water heat exchanger exchanges heat with the heat medium, the size of two one-phase regions of the heat medium in the water heat exchanger and one of the heat medium in the water heat exchanger By changing the size of the two-phase region, the amount of heat exchange between the water and the heat medium in the water heat exchanger can be changed, so the hot water coming out of the water heat exchanger deviates significantly from the set temperature of the secondary heat exchange terminal. Can be prevented.

In the temperature control system of one embodiment,
The control device controls the size of one phase region of the heat medium in each of the water heat exchangers and the size of one two phase region of the heat medium in each of the water heat exchangers during cooling operation. To do.

  According to the temperature control system of the above embodiment, during the cooling operation, the heat medium discharged from the compressor is heat-exchanged with the outdoor heat source in the outdoor heat exchanger and condensed. The condensed heat medium expands by the expansion mechanism, evaporates in the water heat exchanger, absorbs heat from the water in the water heat exchanger, and returns to the compressor. At this time, the water flowing through the water heat exchanger becomes cold water through heat exchange with the heat medium and flows toward the secondary heat exchanger.

  Thus, when the water in the water heat exchanger exchanges heat with the heat medium, the size of one phase region of the heat medium in the water heat exchanger and one of the heat medium in the water heat exchanger. By changing the size of the two-phase region, the amount of heat exchange between the water and the heat medium in the water heat exchanger can be changed, so the temperature of the cold water coming out of the water heat exchanger is It can be prevented from coming off greatly.

The temperature control system of one embodiment is
A two-phase region temperature detector for detecting the temperature of the two-phase region of the heat medium in the water heat exchanger is provided.

  According to the temperature control system of the above embodiment, the temperature of the two-phase region of the heat medium in the water heat exchanger can be detected using the two-phase region temperature detection unit. Therefore, the said control apparatus can control the magnitude | size of the two-phase area | region favorably based on the temperature of the two-phase area | region of the heat medium in a water heat exchanger.

In the temperature control system of one embodiment,
The two-phase region temperature detection unit is a pressure sensor connected to a portion near the water heat exchanger of the heat medium circuit.

  According to the temperature control system of the above embodiment, since the pressure sensor is connected to a portion near the water heat exchanger of the heat medium circuit, the pressure of the heat medium in the water heat exchanger can be accurately detected. Can do. Therefore, the said control apparatus can detect the temperature of the two-phase area | region of the heat medium in a water heat exchanger correctly based on the pressure of the heat medium in a water heat exchanger.

In the temperature control system of one embodiment,
The two-phase region temperature detection unit is a two-phase region temperature sensor attached to the water heat exchanger.

  According to the temperature control system of the above embodiment, since the temperature sensor for the two-phase region is attached to the water heat exchanger, the temperature of the two-phase region of the heat medium in the water heat exchanger is accurately detected. be able to.

The temperature control system of one embodiment is
A first one-phase region temperature sensor for detecting the temperature of the one-phase region of the heat medium in the water heat exchanger during the heating operation;
In the heating operation, the control device is configured to change the water heat exchanger based on a temperature difference between the two-phase region of the heat medium in the water heat exchanger and the one-phase region of the heat medium in the water heat exchanger. Control the size of one phase region of the heating medium inside.

  According to the temperature control system of the above-described embodiment, the control device is configured such that, during heating operation, the temperature difference between the two-phase region of the heat medium in the water heat exchanger and the one-phase region of the heat medium in the water heat exchanger. Since the size of one phase region of the heat medium in the water heat exchanger is controlled based on the above, the reliability of this control can be enhanced.

The temperature control system of one embodiment is
A second temperature sensor for one phase region for detecting the temperature of the one phase region of the heat medium in the water heat exchanger during cooling operation;
In the cooling operation, the control device is configured to change the water heat exchanger based on a temperature difference between the two-phase region of the heat medium in the water heat exchanger and the one-phase region of the heat medium in the water heat exchanger. Control the size of one phase region of the heating medium inside.

  According to the temperature control system of the embodiment described above, the control device is configured such that, during cooling operation, the temperature difference between the two-phase region of the heat medium in the water heat exchanger and the one-phase region of the heat medium in the water heat exchanger. Since the size of one phase region of the heat medium in the water heat exchanger is controlled based on the above, the reliability of this control can be enhanced.

  The temperature control system of the present invention is based on the set temperature of each secondary heat exchange terminal, and the size of one phase region of the heat medium in each of the water heat exchangers and the heat medium in each of the water heat exchangers. By providing a control device that controls the size of the two-phase region, hot water or cold water corresponding to the set temperature of the secondary side heat exchange terminal can be supplied to the secondary side heat exchange terminal. Temperature fluctuation of the heat exchange terminal can be reduced.

  Moreover, since the secondary side heat exchange terminal can be supplied with hot water or cold water according to the set temperature, the repetition of thermo-off can be reduced and the equipment efficiency can be improved.

It is a schematic block diagram of the temperature control system of one Embodiment of this invention. It is a schematic diagram for demonstrating the operation | movement at the time of the heating operation of the said temperature control system. It is a schematic diagram for demonstrating the other operation | movement at the time of the heating operation of the said temperature control system. It is a schematic diagram for demonstrating the operation | movement at the time of the cooling operation of the said temperature control system. It is a schematic diagram for demonstrating the other operation | movement at the time of the cooling operation of the said temperature control system.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

  FIG. 1 is a diagram showing a schematic configuration of a temperature control system according to an embodiment of the present invention.

[Overall configuration of temperature control system]
The temperature control system includes an outdoor unit 100, first and second floor cooling / heating units 200, 300 connected to the outdoor unit 100, and first and second floors connected to the first floor cooling / heating unit 200. Floor heating and cooling panels 401 and 402, third and fourth floor cooling and heating panels 403 and 404 connected to the second floor cooling and heating unit 300, and an indoor heat exchanger 501 connected to the outdoor unit 100. Yes. In addition, the 1st-4th floor air conditioning panel 401-404 is an example of a secondary side heat exchange terminal.

[Configuration of outdoor unit 100]
The outdoor unit 100 includes a compressor 101, a four-way valve 102 having a first port 102a connected to the discharge side of the compressor 101, and an outdoor heat having one end connected to a second port 102b of the four-way valve 102. An exchanger 103, first to third electric expansion valves 104 to 106 having one end connected to the other end of the outdoor heat exchanger 103, and an accumulator 107 having one end connected to the suction side of the compressor 101. Have. The other end of the accumulator 107 is connected to the third port 102 c of the four-way valve 102. The first and second electric expansion valves 104 and 105 are an example of an expansion mechanism.

  Further, the outdoor unit 100 is a control for an outdoor unit that receives, for example, first to ninth temperature sensors 108 to 116 made of a thermistor and signals indicating temperatures detected by the first to ninth temperature sensors 108 to 116. Device 117. The outdoor unit control device 117 is an example of a control device.

  The first temperature sensor 108 is installed in the vicinity of the first electric expansion valve 104. The first temperature sensor 108 detects the temperature of the refrigerant between the first electric expansion valve 104 and a double-pipe hydrothermal exchanger 201 described later. More specifically, the first temperature sensor 108 detects the temperature of the refrigerant just before entering the first electric expansion valve 104 from the double-pipe hydrothermal exchanger 201 during the heating operation. The first temperature sensor 108 sends a signal indicating the temperature of the refrigerant to the outdoor unit control device 117. The first temperature sensor 108 is an example of a first one-phase temperature sensor, the double-pipe water heat exchanger 201 is an example of a water heat exchanger, and the refrigerant is an example of a heat medium. .

  The second temperature sensor 109 is installed in the vicinity of the second electric expansion valve 105. The second temperature sensor 109 detects the temperature of the refrigerant between the second electric expansion valve 105 and a double-pipe hydrothermal exchanger 301 described later. More specifically, the second temperature sensor 109 detects the temperature of the refrigerant just before exiting the double-pipe hydrothermal exchanger 301 and entering the second electric expansion valve 105 during heating operation. The second temperature sensor 109 sends a signal indicating the temperature of the refrigerant to the outdoor unit controller 117. The second temperature sensor 109 is an example of a first one-phase region temperature sensor, and the double-pipe water heat exchanger 301 is an example of a water heat exchanger.

  The third temperature sensor 110 detects the temperature of the refrigerant between the third electric expansion valve 106 and the indoor heat exchanger 501.

  The fourth temperature sensor 111 detects the temperature of the refrigerant between the fourth port 102d of the four-way valve 102 and the indoor heat exchanger 501.

  The fifth temperature sensor 112 is installed in the vicinity of the merging / dividing part 120. The fifth temperature sensor 112 detects the temperature of the refrigerant between the merging / dividing unit 120 and the double-pipe water heat exchanger 301. More specifically, the fifth temperature sensor 112 detects the temperature of the refrigerant immediately after passing through the merging / dividing unit 120 during the cooling operation, and sends a signal indicating this temperature to the outdoor unit controller 117. The fifth temperature sensor 112 is an example of a second one-phase region temperature sensor.

  The sixth temperature sensor 113 is installed in the vicinity of the merging / dividing part 120. The sixth temperature sensor 113 detects the temperature of the refrigerant between the merging / dividing unit 120 and the double-pipe water heat exchanger 201. More specifically, the sixth temperature sensor 113 detects the temperature of the refrigerant immediately after passing through the merging / dividing unit 120 during the cooling operation, and sends a signal indicating this temperature to the outdoor unit controller 117. The sixth temperature sensor 113 is an example of a second one-phase region temperature sensor.

  The seventh temperature sensor 114 detects the temperature of the refrigerant between the compressor 101 and the first port 102a of the four-way valve 102.

  The eighth temperature sensor 115 is attached to the outdoor heat exchanger 103 in order to detect the temperature of the refrigerant in the outdoor heat exchanger 103.

  The ninth temperature sensor 116 is disposed in the vicinity of the outdoor heat exchanger 103 in order to detect the outside air temperature.

  The outdoor unit control device 117 controls the compressor 101 via an inverter (not shown). The outdoor unit control device 117 includes first to third valve opening degree adjustment units 117a to 117c configured by software.

  In addition, the outdoor unit control device 117 is used in the double-pipe water heat exchangers 201 and 301 based on the refrigerant pressure in the double-pipe water heat exchangers 201 and 301 during heating operation and cooling operation. The temperature of the two-phase region of the refrigerant is detected.

  In addition, the outdoor unit control device 117 includes a double pipe type water heat exchanger 201, 301 based on the temperature of the refrigerant just before entering the first and second electric expansion valves 104, 105 during the heating operation. The temperature of one phase region of the refrigerant is detected.

  In addition, the outdoor unit control device 117 is configured so that the one-phase region of the refrigerant in the double-pipe hydrothermal exchangers 201 and 301 is based on the temperature of the refrigerant immediately after passing through the merging / dividing unit 120 during the cooling operation. Detect the temperature.

  The first valve opening degree adjustment unit 117a controls the size of the one-phase region and the two-phase region of the refrigerant in the double-pipe hydrothermal exchanger 201, so that the first and second floor cooling / heating panels 401 are provided. , 402 is adjusted based on the set temperature of the first electric expansion valve 104.

  The second valve opening adjustment unit 117b controls the size of the one-phase region and the two-phase region of the refrigerant in the double-pipe hydrothermal exchanger 301, so that the third and fourth floor cooling / heating panels 403 are provided. , 404, etc., the opening degree of the second electric expansion valve 105 is adjusted.

  The third valve opening degree adjusting unit 117c controls the size of the one-phase region and the two-phase region of the refrigerant in the indoor heat exchanger 501, so that the second electric expansion valve 105 is based on the indoor set temperature. Adjust the opening.

  Here, the “one-phase region” refers to a heated gas region in which the refrigerant is a superheated gas or a supercooled liquid region in which the refrigerant is a supercooled liquid. The “two-phase region” is a saturation region where the refrigerant is in a gas-liquid two-phase state in which the gas phase and the liquid phase are mixed.

  The outdoor heat exchanger 103, the compressor 101, the double-pipe water heat exchangers 201 and 301, and the first and second electric expansion valves 104 and 105 are connected in order, and each of them is one of the refrigerant circuit 601. Parts. The refrigerant circuit 601 is an example of a heat medium circuit.

  Although not shown, an outdoor fan is disposed in the vicinity of the outdoor heat exchanger 103.

[Configuration of the first floor cooling and heating unit 200]
The first floor cooling / heating unit 200 includes a double-pipe water heat exchanger 201, an expansion tank 202, a circulation pump 203, a forward header 204, and a return header 205. The circulation pump 203 is an example of a pump.

  The double pipe type water heat exchanger 201 functions as a condenser or an evaporator of the refrigerant circuit 601. The double-pipe water heat exchanger 201 is provided with a flow path through which refrigerant from the outdoor unit 100 flows and a flow path through which return water from the first and second floor cooling / heating panels 401 and 402 flows. Yes. Thereby, the refrigerant from the outdoor unit 100 and the return water from the second floor cooling / heating panels 401 and 402 can exchange heat with each other.

  The expansion tank 202 is provided with a positive / negative pressure valve, and hot water or cold water from the double-pipe hydrothermal exchanger 201 is accumulated therein. Further, a water supply port 202a is provided in the upper part of the expansion tank 202, and water is replenished into the expansion tank 202 from the water supply port 202a when necessary.

  The circulation pump 203 is connected to the expansion tank 202 on the suction side and connected to the forward header 204 on the discharge side. As a result, the circulation pump 203 can send hot water or cold water heat-exchanged with the refrigerant passing through the double-pipe water heat exchanger 201 to the first and second floor cooling and heating panels 401 and 402. Yes.

  One end of the first to fourth thermal valves 206 to 209 and one end of the drain plug 210 are connected to the forward header 204. Water inlets of the first and second floor cooling / heating panels 401 and 402 are connected to the other ends of the first and second thermal valves 206 and 207, respectively.

  The return header 205 is connected to water outlets of the first and second floor cooling / heating panels 401 and 402. Thereby, the hot water or cold water of the 1st, 2nd floor air conditioning panel 401,402 returns to the 1st floor air conditioning unit 200, and water can circulate through the water circuit 211 now.

  The first floor cooling / heating unit 200 includes, for example, first and second water temperature sensors 212, 213 made of a thermistor, a first refrigerant temperature sensor 214 made of, for example, a thermistor, a pressure sensor 215, and a floor cooling / heating unit. Control device 216. The first refrigerant temperature sensor 214 is an example of a first one-phase temperature sensor. Moreover, the pressure sensor 215 is an example of a two-phase region temperature detection unit, and is also an example of a pressure sensor.

  The first water temperature sensor 212 detects the temperature of hot water or cold water flowing from the double-pipe water heat exchanger 201 toward the first and second floor cooling / heating panels 401 and 402.

  The second water temperature sensor 213 detects the temperature of hot water or cold water flowing from the first and second floor cooling / heating panels 401 and 402 toward the double-pipe water heat exchanger 201.

  The first refrigerant temperature sensor 214 is installed in the vicinity of the double-pipe water heat exchanger 201. The first refrigerant temperature sensor 214 detects the refrigerant temperature between the first electric expansion valve 104 and the double-pipe water heat exchanger 201. More specifically, the first refrigerant temperature sensor 214 detects the temperature of the refrigerant immediately after coming out of the double-pipe water heat exchanger 201 during the heating operation.

  The pressure sensor 215 is connected to a portion in the vicinity of the double-pipe hydrothermal exchanger 201 of the heat medium circuit 601. The pressure sensor 215 detects the pressure of the refrigerant between the fourth port 102d of the four-way valve 102 and the double-pipe hydrothermal exchanger 201, and sends a signal indicating this pressure to the floor cooling / heating unit controller 216. Send it out.

  The floor cooling / heating unit control device 216 obtains the pressure of the refrigerant in the double-pipe hydrothermal exchanger 201 based on the signal from the pressure sensor 215, and uses the signal indicating the pressure of the refrigerant as the outdoor unit control device. To 100. The floor cooling / heating unit control device 216 also sends a signal indicating the set temperature of the first and second floor cooling / heating panels 401, 402 to the outdoor unit control device 100. The floor cooling / heating unit control device 216 is based on the set temperature of the first and second floor cooling / heating panels 401, 402, the temperature of hot water or cold water detected by the first and second water temperature sensors 212, 213, and the like. The circulation pump 203 and the first to fourth thermal valves 206 to 209 are controlled.

  The first floor cooling / heating unit 200 is attached to the double-pipe water heat exchanger 201 and includes second and third refrigerant temperature sensors 217 and 218 made of, for example, a thermistor. The second refrigerant temperature sensor 217 is opposed to the substantially central portion of the double-pipe hydrothermal exchanger 201 in the refrigerant flow direction. On the other hand, the third refrigerant temperature sensor 218 faces one end of the double-pipe hydrothermal exchanger 201 in the refrigerant flow direction. The second and third refrigerant temperature sensors 217 and 218 are an example of a two-phase region temperature detection unit and an example of a two-phase region temperature sensor.

[Configuration of second floor cooling / heating unit 300]
The second floor cooling / heating unit 300 includes a double-pipe water heat exchanger 301, an expansion tank 302, a circulation pump 303, a forward header 304, and a return header 305. The circulation pump 303 is an example of a pump.

  The double pipe type water heat exchanger 301 functions as a condenser or an evaporator of the refrigerant circuit 601. The double pipe type water heat exchanger 301 is provided with a flow path through which refrigerant from the outdoor unit 100 flows and a flow path through which return water from the third and fourth floor cooling / heating panels 403 and 404 flows. Yes. Thereby, the refrigerant from the outdoor unit 100 and the return water from the second floor cooling / heating panels 403 and 404 can exchange heat with each other.

  The expansion tank 302 is provided with a positive / negative pressure valve, and hot water or cold water from the double-pipe hydrothermal exchanger 301 is accumulated therein. In addition, a water supply port 302a is provided in the upper part of the expansion tank 302, and water is replenished into the expansion tank 302 from the water supply port 202a when necessary.

  The circulation pump 303 has a suction side connected to the expansion tank 302 and a discharge side connected to the forward header 304. As a result, the circulation pump 303 can send hot water or cold water heat-exchanged with the refrigerant passing through the double-pipe water heat exchanger 301 to the third and fourth floor cooling / heating panels 403 and 404. Yes.

  One end of the first to fourth thermal valves 306 to 309 and one end of the second drain plug 310 are connected to the forward header 304. Water inlets of the third and fourth floor cooling / heating panels 403 and 404 are connected to the other ends of the first and second thermal valves 306 and 307, respectively.

  The return header 305 is connected to the water outlets of the third and fourth floor cooling / heating panels 403 and 404. As a result, the hot water or cold water of the third and fourth floor cooling / heating panels 403, 404 returns to the second floor cooling / heating unit 300 so that water can circulate through the water circuit 311.

  The second floor cooling / heating unit 300 includes, for example, first and second water temperature sensors 312, 313 made of a thermistor, a first refrigerant temperature sensor 314 made of, for example, a thermistor, a first pressure sensor 315, And a floor cooling / heating unit control device 316. The first refrigerant temperature sensor 314 is an example of a first one-phase temperature sensor. The pressure sensor 315 is an example of a two-phase region temperature detection unit, and is also an example of a pressure sensor.

  The first water temperature sensor 312 detects the temperature of hot water or cold water flowing from the double-pipe water heat exchanger 301 toward the third and fourth floor cooling / heating panels 403 and 404.

  The second water temperature sensor 313 detects the temperature of hot water or cold water flowing from the third and fourth floor cooling / heating panels 403 and 404 toward the double-pipe water heat exchanger 301.

  The first refrigerant temperature sensor 314 is installed in the vicinity of the double pipe type water heat exchanger 301. The first refrigerant temperature sensor 314 detects the temperature of the refrigerant between the second electric expansion valve 105 and the double pipe water heat exchanger 301. More specifically, the first refrigerant temperature sensor 314 detects the temperature of the refrigerant immediately after coming out of the double-pipe water heat exchanger 301 during the heating operation.

  The pressure sensor 315 is connected to a portion in the vicinity of the double-pipe hydrothermal exchanger 301 of the heat medium circuit 601. The pressure sensor 315 detects the refrigerant pressure between the fourth port 102d of the four-way valve 102 and the double-pipe hydrothermal exchanger 301, and sends a signal indicating this pressure to the floor cooling / heating unit controller 316. Send it out.

  The floor cooling / heating unit control device 316 obtains the pressure of the refrigerant in the double-pipe hydrothermal exchanger 301 based on the signal from the pressure sensor 315, and uses the signal indicating the pressure of the refrigerant as the outdoor unit control device. To 100. The floor cooling / heating unit control device 316 also sends signals indicating the set temperatures of the third and fourth floor cooling / heating panels 403, 404 to the outdoor unit control device 100. The floor cooling / heating unit control device 316 is based on the set temperature of the third and fourth floor cooling / heating panels 403, 404, the temperature of hot water or cold water detected by the first and second water temperature sensors 312, 313, and the like. The circulation pump 303 and the first to fourth thermal valves 306 to 309 are controlled.

  The second floor cooling / heating unit 300 is attached to the double-pipe hydrothermal exchanger 301 and has second and third refrigerant temperature sensors 317 and 318 made of, for example, thermistors. The second refrigerant temperature sensor 317 is opposed to a substantially central portion of the double pipe type water heat exchanger 301 in the refrigerant flow direction. On the other hand, the third refrigerant temperature sensor 318 is opposed to one end of the double-pipe hydrothermal exchanger 301 in the refrigerant flow direction. The second and third refrigerant temperature sensors 317 and 318 are an example of a two-phase region temperature detection unit and an example of a two-phase region temperature sensor.

[Configuration of the first to fourth floor cooling and heating panels 401 to 404]
The first to fourth floor cooling / heating panels 401 to 404 have first to fourth water circulation pipes 411 to 414 formed in a meandering shape. In the first and second water circulation pipes 411 and 412, hot water or cold water from the double-pipe hydrothermal exchanger 201 flows. On the other hand, in the third and fourth water circulation pipes 413 and 414, hot water or cold water from the double-pipe water heat exchanger 301 flows.

[Configuration of indoor heat exchanger 501]
The indoor heat exchanger 501 has one end connected to the third electric expansion valve 106 and the other end connected to the fourth port 102 d of the four-way valve 102. In order to detect the temperature of the refrigerant in the indoor heat exchanger 501, a first temperature sensor 502 made of, for example, a thermistor is attached to the indoor heat exchanger 501. Further, a second temperature sensor 503 made of, for example, a thermistor is disposed in the vicinity of the indoor heat exchanger 501 in order to detect the room temperature.

  Although not shown, an indoor fan is disposed in the vicinity of the indoor heat exchanger 501.

[Heating operation of temperature control system]
In the temperature control system, during heating operation, the refrigerant discharged from the compressor 101 passes through the first and fourth ports 102a and 102d of the four-way valve 102, and a part thereof is a double-pipe water heat exchanger. The other part flows into the double pipe type water heat exchanger 301. Then, the refrigerant condensed by heat exchange with water in the double-pipe water heat exchangers 201 and 301 expands by the first and second electric expansion valves 104 and 105 and evaporates in the outdoor heat exchanger 103. After absorbing heat from outdoor air, the air passes through the second and third ports 102b and 102c of the four-way valve 102 and the accumulator 107 and returns to the compressor 101. At this time, the water flowing through the double-pipe water heat exchangers 201 and 301 becomes hot water by heat exchange with the refrigerant and flows toward the first to fourth floor cooling and heating panels 401 to 404.

  During such heating operation, the outdoor unit control device 117 has two one-phase regions (supercooled liquid region and superheated gas region) of the refrigerant in the double-pipe hydrothermal exchangers 201 and 301, and two The size of one two-phase region (saturation region) of the refrigerant in the double pipe type water heat exchangers 201 and 301 is controlled. At this time, the outdoor unit control device 117 includes two phases of the heat medium in the double pipe water heat exchangers 201 and 301 and one phase of the heat medium in the double pipe water heat exchangers 201 and 301. Based on the temperature difference from the zone (supercooled liquid zone), the size of the one-phase zone is controlled. That is, the control of the size of the one-phase region is performed based on a so-called supercooling degree.

For example, as shown in FIG. 2, when the set temperature of the first and third floor cooling and heating panels 401 and 403 is 50 ° C., and the set temperature of the second and fourth floor cooling and heating panels 402 and 404 is 45 ° C. The outdoor unit control device 117 is configured so that the supercooled liquid region and the superheated gas in the double pipe water heat exchangers 201 and 301 are increased so that the heat transfer efficiency of the double pipe water heat exchangers 201 and 301 is increased. The size of the area and the size of the saturation area of the refrigerant in the double-pipe water heat exchangers 201 and 301 are controlled. At this time, the water of the return water temperatures A ₁ and B ₁ (temperature of water entering the double-pipe water heat exchangers 201 and 301) exchanges heat with the refrigerant in the double-pipe water heat exchangers 201 and 301. The first and second valve opening degree adjustment units 117a and 117b are arranged so that the outgoing water temperatures A ₂ and B ₂ (the temperature of the hot water discharged from the double-pipe water heat exchangers 201 and 301) are 50 ° C. 1, the opening degree of the second electric expansion valves 104 and 105 is adjusted.

  Here, increasing the heat transfer efficiency of the double pipe water heat exchangers 201 and 301 is the same as increasing the saturation region of the refrigerant in the double pipe water heat exchangers 201 and 301. . For this reason, the size of the saturation region of the refrigerant in the double tube water heat exchanger 301 is substantially the same as the size of the saturation region of the refrigerant in the double tube water heat exchanger 201.

For example, as shown in FIG. 3, the setting temperature of the first floor cooling / heating panel 401 is 50 ° C., the setting temperature of the second floor cooling / heating panel 402 is 45 ° C., and the setting of the third floor cooling / heating panel 403 is performed. When the temperature is 40 ° C. and the set temperature of the fourth floor cooling / heating panel 404 is 30 ° C., the outdoor unit controller 117 is configured so that the heat transfer efficiency of the double-pipe water heat exchanger 201 is increased. The size of the supercooled liquid region and superheated gas region in the double tube water heat exchanger 201 and the size of the refrigerant saturation region in the double tube water heat exchanger 201 are controlled. In addition, the outdoor unit control device 117 is configured to increase the size of the supercooled liquid region and the superheated gas region in the double-pipe water heat exchanger 301 so that the heat transfer efficiency of the double-pipe type water heat exchanger 301 is reduced. And the size of the saturation region of the refrigerant in the double-pipe water heat exchanger 301 are controlled. At this time, the water of the return water temperatures A ₁ and B ₁ exchanges heat with the refrigerant in the double-pipe water heat exchangers 201 and 301, the outgoing water temperature A ₂ becomes 50 ° C., and the outgoing water temperature B ₂ becomes 40 The first and second valve opening degree adjustment units 117a and 117b adjust the opening degree of the first and second electric expansion valves 104 and 105 so that the temperature becomes 0 ° C. Thereby, compared with the quantity of the refrigerant | coolant which flows in in the double pipe type water heat exchanger 201, the quantity of the refrigerant | coolant which flows in in the double pipe type water heat exchanger 301 becomes small.

  Here, reducing the heat transfer efficiency of the double pipe water heat exchanger 301 is the same as reducing the saturation region of the refrigerant in the double pipe water heat exchanger 301. For this reason, the size of the saturation region of the refrigerant in the double-pipe water heat exchanger 301 is smaller than the size of the saturation region of the refrigerant in the double-pipe water heat exchanger 201.

  In addition, the adjustment of the opening degree of the first and second electric expansion valves 104 and 105 by the first and second valve opening degree adjustment units 117a and 117b is, for example, an excess of the double pipe type water heat exchanger 201. The process is started by setting the target value of the supercooling degree of the double-pipe hydrothermal exchanger 301 to be larger than the target value of the cooling degree.

  Thus, when the water in the double pipe water heat exchanger 201, 301 exchanges heat with the refrigerant, the size of the supercooled liquid area and the superheated gas area in the double pipe water heat exchanger 201, Since the amount of heat exchange between the water and the refrigerant in the double tube water heat exchangers 201 and 301 can be changed by changing the size of the saturation region of the refrigerant in the double tube water heat exchanger 201, It can prevent that the temperature of the warm water which comes out from the tubular water heat exchangers 201 and 301 largely deviates from the set temperature of the first to fourth floor cooling / heating panels 401 to 404. As a result, temperature fluctuations of the first to fourth floor cooling / heating panels 401 to 404 can be reduced.

  Moreover, since it can prevent that the temperature of the warm water which comes out of the said double tube type water heat exchanger 201,301 deviates largely from the setting temperature of the 1st-4th floor cooling-heating panel 401-404, it is 1st, 1st. Even if the second thermal valves 206 and 207 and the first and second thermal valves 306 and 307 are opened intermittently, the start and stop of the compressor 101 can be reduced. As a result, the device efficiency of the temperature control system can be improved.

  It is not preferable to perform the control during the heating operation as described above on the indoor heat exchanger 501. This is because the above control kills a part of the capacity of the double-pipe water heat exchanger 301.

  Moreover, even if it does not perform the said control, if it is the indoor heat exchanger 501, indoor temperature can be lowered | hung by reducing the rotation speed of an indoor fan.

  Therefore, the above control is irrelevant to the control of the indoor heat exchanger 501, and even a person skilled in the art cannot easily conceive from the control of the indoor heat exchanger 501.

  Further, since the pressure sensors 215 and 315 are connected to the portion of the heat medium circuit 601 in the vicinity of the double-pipe water heat exchangers 201 and 301, the heat in the double-pipe water heat exchangers 201 and 301 is connected. The pressure of the medium can be accurately detected. Therefore, the outdoor unit controller 117 uses the heat medium in the double pipe water heat exchangers 201 and 301 based on the pressure of the heat medium in the double pipe water heat exchangers 201 and 301 during the heating operation. The temperature in the two-phase region can be accurately detected. Therefore, the outdoor unit control device 117 has a very good size of the two-phase region based on the temperature of the two-phase region of the heat medium in the double-pipe hydrothermal exchangers 201 and 301 during the heating operation. Can be controlled.

  In addition, the outdoor unit control device 117 is configured so that the two-phase region of the heat medium in the double-pipe water heat exchangers 201 and 301 and the heat in the double-pipe water heat exchangers 201 and 301 during heating operation. Since the size of the one-phase region of the heat medium in the double-pipe hydrothermal exchangers 201 and 301 is controlled based on the temperature difference from the one-phase region of the medium, the reliability of this control can be improved. .

[Cooling operation of temperature control system]
In the temperature control system, during cooling operation, the refrigerant discharged from the compressor 101 passes through the first and second ports 102a and 102b of the four-way valve 102, and the outdoor heat exchanger 103 and the outdoor air and heat It is exchanged and condensed. The condensed refrigerant is expanded by the first and second electric expansion valves 104 and 105, evaporated in the double pipe water heat exchanger 201, and from the water in the double pipe water heat exchanger 201. After absorbing the heat, it passes through the third and fourth ports 102 c and 102 d of the four-way valve 102 and the accumulator 107 and returns to the compressor 101. At this time, the water flowing in the double-pipe water heat exchanger 201 becomes cold water by heat exchange with the refrigerant and flows toward the first to fourth floor cooling / heating panels 401 to 404.

  During such cooling operation, the outdoor unit control device 117 determines the size of one phase region (superheated gas region) of the refrigerant in the double-pipe water heat exchangers 201 and 301, and the double-pipe type water heat. The size of one two-phase region (saturation region) of the refrigerant in the exchangers 201 and 301 is controlled. At this time, the outdoor unit control device 117 includes two phases of the heat medium in the double pipe water heat exchangers 201 and 301 and one phase of the heat medium in the double pipe water heat exchangers 201 and 301. The size of the one phase region is controlled based on the temperature difference from the region. That is, the control of the size of the one-phase region is performed based on the so-called superheat degree.

For example, as shown in FIG. 4, when the set temperature of the first and third floor cooling and heating panels 401 and 403 is 10 ° C., and the set temperature of the second and fourth floor cooling and heating panels 402 and 404 is 15 ° C. The outdoor unit control device 117 has a size of the superheated gas region in the double pipe water heat exchangers 201 and 301 so that the heat transfer efficiency of the double pipe water heat exchangers 201 and 301 is increased. The size of the saturation region of the refrigerant in the double-pipe water heat exchangers 201 and 301 is controlled. At this time, the water of the return water temperatures A ₁ and B ₁ (temperature of water entering the double-pipe water heat exchangers 201 and 301) exchanges heat with the refrigerant in the double-pipe water heat exchangers 201 and 301. The first and second valve opening degree adjustment units 117a and 117b are arranged so that the outgoing water temperatures A ₂ and B ₂ (the temperature of the hot water discharged from the double-pipe water heat exchangers 201 and 301) are 10 ° C. 1, the opening degree of the second electric expansion valves 104 and 105 is adjusted.

  Here, increasing the heat transfer efficiency of the double pipe water heat exchangers 201 and 301 is the same as increasing the saturation region of the refrigerant in the double pipe water heat exchangers 201 and 301. . For this reason, the size of the saturation region of the refrigerant in the double tube water heat exchanger 301 is substantially the same as the size of the saturation region of the refrigerant in the double tube water heat exchanger 201.

For example, as shown in FIG. 5, the setting temperature of the first floor cooling / heating panel 401 is 10 ° C., the setting temperature of the second floor cooling / heating panel 402 is 15 ° C., and the setting of the third floor cooling / heating panel 403 is performed. When the temperature is 10 ° C. and the set temperature of the fourth floor cooling / heating panel 404 is 18 ° C., the outdoor unit controller 117 is configured so that the heat transfer efficiency of the double-pipe water heat exchanger 201 is increased. The size of the supercooled liquid region and superheated gas region in the double tube water heat exchanger 201 and the size of the refrigerant saturation region in the double tube water heat exchanger 201 are controlled. In addition, the outdoor unit control device 117 is configured so that the size of the superheated gas region in the double pipe water heat exchanger 301 and the double pipe are reduced so that the heat transfer efficiency of the double pipe water heat exchanger 301 is reduced. The size of the saturation region of the refrigerant in the water heater 301 is controlled. At this time, the water of the return water temperatures A ₁ and B ₁ exchanges heat with the refrigerant in the double-pipe water heat exchangers 201 and 301, the outgoing water temperature A ₂ becomes 10 ° C., and the outgoing water temperature B ₂ is 15 The first and second valve opening degree adjustment units 117a and 117b adjust the opening degree of the first and second electric expansion valves 104 and 105 so that the temperature becomes 0 ° C. Thereby, compared with the quantity of the refrigerant | coolant which flows in in the double pipe type water heat exchanger 201, the quantity of the refrigerant | coolant which flows in in the double pipe type water heat exchanger 301 becomes small.

  Here, reducing the heat transfer efficiency of the double pipe water heat exchanger 301 is the same as reducing the saturation region of the refrigerant in the double pipe water heat exchanger 301. For this reason, the size of the saturation region of the refrigerant in the double-pipe water heat exchanger 301 is smaller than the size of the saturation region of the refrigerant in the double-pipe water heat exchanger 201.

  Moreover, the adjustment of the opening degree of the first and second electric expansion valves 104 and 105 by the first and second valve opening degree adjustment units 117a and 117b is, for example, overheating of the double-pipe water heat exchanger 201. This is started by setting the target value of the superheat degree of the double-pipe water heat exchanger 301 to be larger than the target value of the degree.

  As described above, when the water in the double pipe water heat exchangers 201 and 301 exchanges heat with the refrigerant, the size of one superheated gas region of the refrigerant in the double pipe water heat exchangers 201 and 301 The amount of heat exchange between water and refrigerant in the double pipe water heat exchangers 201 and 301 is changed by changing the size of one saturation region of the refrigerant in the double pipe water heat exchangers 201 and 301. Since it can do, it can prevent that the temperature of the cold water which comes out of the double pipe type water heat exchanger 201,301 deviates largely from the setting temperature of the 1st-4th floor cooling / heating panels 401-404. As a result, temperature fluctuations of the first to fourth floor cooling / heating panels 401 to 404 can be reduced.

  Moreover, since it can prevent that the temperature of the cold water which comes out of the said double pipe type water heat exchanger 201,301 remove | deviates greatly from the setting temperature of the 1st-4th floor air conditioning panel 401-404, it is the 1st, 1st. Even if the second thermal valves 206 and 207 and the first and second thermal valves 306 and 307 are opened intermittently, the start and stop of the compressor 101 can be reduced. As a result, the device efficiency of the temperature control system can be improved.

  It is not preferable to perform the control during the cooling operation as described above on the indoor heat exchanger 501. This is because the above control kills a part of the capacity of the double-pipe water heat exchanger 301.

  Moreover, even if it does not perform the said control, if it is the indoor heat exchanger 501, indoor temperature can be lowered | hung by reducing the rotation speed of an indoor fan.

  In addition, when the above control is performed by the indoor heat exchanger 501, condensation occurs near the indoor heat exchanger 501, and the wind of the indoor fan blows the condensation into the room.

  Therefore, the above control is irrelevant to the control of the indoor heat exchanger 501, and even a person skilled in the art cannot easily conceive from the control of the indoor heat exchanger 501.

  Further, since the pressure sensors 215 and 315 are connected to the portion of the heat medium circuit 601 in the vicinity of the double-pipe water heat exchangers 201 and 301, the heat in the double-pipe water heat exchangers 201 and 301 is connected. The pressure of the medium can be accurately detected. Therefore, the outdoor unit controller 117 uses the heat medium in the double pipe water heat exchangers 201 and 301 based on the pressure of the heat medium in the double pipe water heat exchangers 201 and 301 during the cooling operation. The temperature in the two-phase region can be accurately detected. Therefore, the control unit 117 for the outdoor unit has a very good size of the two-phase area based on the temperature of the two-phase area of the heat medium in the double-pipe water heat exchangers 201 and 301 during the cooling operation. Can be controlled.

  In addition, the outdoor unit control device 117 is configured so that the two-phase region of the heat medium in the double pipe water heat exchangers 201 and 301 and the heat in the double pipe water heat exchangers 201 and 301 during the cooling operation. Since the size of the one phase region of the heat medium in the water heat exchanger is controlled based on the temperature difference from the one phase region of the medium, the reliability of this control can be improved.

  In the above embodiment, the temperature control system can perform heating and cooling with the first to fourth floor cooling / heating panels 401 to 404, but heating and cooling with the first to fourth floor cooling / heating panels 401 to 404 are possible. It is also possible to perform only one of the above.

  In the above embodiment, the first to third valve opening degree adjustment units 117a and 117b are configured by software, but may be configured by hardware such as a switch, a timer, a comparator, and an amplifier.

  In the above embodiment, the first and second floor cooling / heating units 200 and 300 have the double-pipe water heat exchangers 201 and 301 as an example of the water heat exchanger. You may have a vessel as an example of a water heat exchanger.

  In the above embodiment, a pressure switch may be provided instead of the pressure sensors 215 and 315.

  In the above embodiment, the circulation pumps 203 and 303 may continuously flow hot water or cold water to the first to fourth floor cooling and heating panels 401 to 404, or may flow intermittently.

  In the above embodiment, the discharge amount of the circulation pump 203 may be the same as the discharge amount of the circulation pump 303, or may be different from the discharge amount of the circulation pump 303.

  In the above embodiment, the first and second electric expansion valves 104 and 105 are provided in the refrigerant circuit 601, but a capillary tube as an example of an expansion mechanism may be provided.

  In the above embodiment, at least one of the first to fourth floor cooling / heating panels 401 to 404 is a ceiling cooling / heating panel, ceiling cooling panel, ceiling heating panel, wall cooling / heating panel, wall cooling panel, wall heating panel, or Alternatively, it may be replaced with an indoor installation type radiator.

  In the above embodiment, the temperature of the two-phase region of the heat medium in the double-pipe water heat exchangers 201 and 301 is detected using the pressure sensors 215 and 315 during heating operation and cooling operation. The temperature of the two-phase region of the heat medium in the double-pipe water heat exchangers 201 and 301 may be detected using the second and third refrigerant temperature sensors 217, 218, 317, and 318. .

  In the above embodiment, during the heating operation, the first and second temperature sensors 108 and 109 are used to detect the temperature of one phase region of the heat medium in the double-pipe hydrothermal exchangers 201 and 301. However, you may make it detect the temperature of the 1 phase area | region of the heat medium in the double pipe | tube type water heat exchangers 201 and 301 using the 1st refrigerant | coolant temperature sensor 214,314.

  Although specific embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the present invention. For example, what combined the said embodiment and the above-mentioned modification suitably is good also as one Embodiment of this invention.

DESCRIPTION OF SYMBOLS 101 Compressor 103 Outdoor heat exchanger 104 1st electric expansion valve 105 2nd electric expansion valve 108 1st temperature sensor 109 2nd temperature sensor 112 5th temperature sensor 113 6th temperature sensor 117 For outdoor units Control device 201, 301 Double pipe type water heat exchanger 203, 303 Circulation pump 214, 314 First refrigerant temperature sensor 215, 315 Pressure sensor 217, 317 Second refrigerant temperature sensor 218, 318 Third refrigerant temperature sensor 401 First floor cooling / heating panel 402 Second floor cooling / heating panel 403 Third floor cooling / heating panel 404 Fourth floor cooling / heating panel 601 Refrigerant circuit

Claims (8)

A heat medium circuit (601) in which an outdoor heat exchanger (103), a compressor (101), a plurality of water heat exchangers (201, 301), and a plurality of expansion mechanisms (104, 105) are sequentially connected;
A plurality of temperature control panels (401, 402, 403, 404) connected to each of the plurality of water heat exchangers (201, 301);
A pump (203, 303) for sending hot water or cold water heat-exchanged with the heat medium passing through the water heat exchanger (201, 301) to the temperature control panel (401, 402, 403, 404);
A control device (117),
The control device (117) is based on a difference in set temperature between the plurality of temperature control panels (401, 402, 403, 404) connected to each of the plurality of water heat exchangers (201, 301). Thus, the size of the one-phase region of the heat medium in each of the water heat exchangers (201, 301) and the size of the two-phase region of the heat medium in each of the water heat exchangers (201, 301) are controlled. A temperature control system characterized by that. In the temperature control system according to claim 1,
During the heating operation, the control device (117) is configured such that the size of the two one-phase regions of the heat medium in each of the water heat exchangers (201, 301) and the amount of heat in each of the water heat exchangers (201, 301). A temperature control system that controls the size of one two-phase region of the heat medium. In the temperature control system according to claim 1 or 2,
During the cooling operation, the control device (117) is configured such that the size of one phase region of the heat medium in each of the water heat exchangers (201, 301) and the size of each of the water heat exchangers (201, 301). A temperature control system that controls the size of one two-phase region of the heat medium. In the temperature control system as described in any one of Claim 1 to 3,
It comprises a two-phase region temperature detector (215, 217, 218, 315, 317, 318) for detecting the temperature of the two-phase region of the heat medium in the water heat exchanger (201, 301). Temperature control system. In the temperature control system according to claim 4,
The two-phase region temperature detection unit (215, 315) is a pressure sensor (215, 315) connected to a portion in the vicinity of the water heat exchanger (201, 301) of the heating medium circuit (601). Characteristic temperature control system. In the temperature control system according to claim 4,
The two-phase region temperature detector (217, 218, 317, 318) is a two-phase region temperature sensor (217, 218, 317, 318) attached to the water heat exchanger (201, 301). Temperature control system characterized by In the temperature control system according to any one of claims 4 to 6,
A first one-phase region temperature sensor (108, 109, 214, 314) for detecting the temperature of the one-phase region of the heat medium in the water heat exchanger (201, 301) during the heating operation;
During the heating operation, the control device (117) includes a two-phase region of the heat medium in the water heat exchanger (201, 301) and a one-phase region of the heat medium in the water heat exchanger (201, 301). The temperature control system is characterized in that the size of one phase region of the heat medium in the water heat exchanger (201, 301) is controlled based on the temperature difference between the water heat exchanger (201, 301). In the temperature control system according to any one of claims 4 to 6,
A second one-phase region temperature sensor (112, 113) for detecting the temperature of the one-phase region of the heat medium in the water heat exchanger (201, 301) during the cooling operation;
During the cooling operation, the control device (117) includes a two-phase region of the heat medium in the water heat exchanger (201, 301) and a one-phase region of the heat medium in the water heat exchanger (201, 301). The temperature control system is characterized in that the size of one phase region of the heat medium in the water heat exchanger (201, 301) is controlled based on the temperature difference between the water heat exchanger (201, 301).

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