JP2005147527A - Air conditioning and hot water supplying system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the following problem: when adopting an electric heater or the like as an auxiliary heat source for instantaneous water heating, electric consumption is increased to increase running costs such as an electric bill. <P>SOLUTION: This air conditioning and hot water supplying system has: a heat pump type air conditioner wherein an indoor unit 6 and an outdoor unit 1 are connected by a refrigerant pipe; a hot water unit 12 having a cistern tank 41, a circulation pump 39, a refrigerant-circulation water heat exchanger 31 heat-exchanging hot water heating circulation water and a refrigerant from the the outdoor unit, and circulation flow passages 34, 37 through which the circulation water flows, and circularly supplying the hot water heating circulation water heated by the refrigerant-circulation water heat exchanger to a heating terminal such as a floor heating panel 8; a hot water supply apparatus 2 supplying hot water to a hot water supply faucet 16 through a hot water supplying pipe 17; and instantaneous water heating function part heating hot water of the hot water supplying pipe near the hot water supply faucet and keeping it warm by the hot water heating circulation water heated by the hot water unit during operation of the hot water unit. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an air conditioning and hot water supply system capable of performing air conditioning by an indoor unit, heating by a heating terminal such as a floor heating panel, and hot water supply.

In a conventional air conditioning and hot water supply system, an air conditioning system that performs air conditioning by an indoor unit or a heating terminal and a hot water supply system that supplies hot water from a water heater to a hot water tap are installed separately and are not associated with each other.
In a conventional hot water supply system, hot water is supplied from a water heater installed outdoors to a furniture with a faucet such as a wash basin or a kitchen sink through a long pipe, and this hot water is mixed with water from a water pipe. Then, the temperature reaches an appropriate temperature and is discharged from a hot water tap that is a hot and cold water mixing tap. However, when the hot water tap is closed for a long time, such as in the morning, cold water collected in a long pipe between the hot water heater and the hot water tap is initially opened. Is discharged from the hot water tap. For this reason, it was not possible to use hot water at an appropriate temperature immediately.

Therefore, for example, as described in Patent Document 1, an auxiliary heat source such as an electric heater is provided in the furniture with a faucet, the hot water supplied to the hot water tap is heated, and the hot water tap is opened to immediately reach an appropriate temperature. Some of them are configured to discharge hot water (that is, instant hot water).
However, if an electric heater or the like is employed as an auxiliary heat source for instant hot water, the amount of electricity consumed increases and running costs such as electricity charges increase. In addition, when installing a hot water unit that supplies circulating water for heating to a heating terminal such as a hot water floor heating panel in a furniture with a faucet, the electric heater for instant hot water and its electric wiring will be obstructed. Problems such as difficulty in installing the unit occur.
JP-A-5-203170

  The problem to be solved is that when an electric heater or the like is used as an auxiliary heat source for instant hot water, the amount of electricity consumed is increased, and the running cost such as the electricity bill is increased. In addition, an auxiliary heat source such as an electric heater is an obstacle to the installation of the hot water unit that supplies the circulating water for heating to the heating terminal.

  The air conditioning and hot water supply system according to claim 1 of the present application includes a heat pump type air conditioner in which an indoor unit (6) and an outdoor unit (1) are connected by a refrigerant pipe, a cistern tank (41), a circulation pump (39 ), A refrigerant-to-circulating water heat exchanger (31) for exchanging heat between the refrigerant from the outdoor unit of the heat pump type air conditioner and the circulating water for hot water heating, and the circulating flow path (34, 37) through which the circulating water flows A hot water unit (12) that circulates and supplies circulating water for hot water heating heated by the refrigerant to the circulating water heat exchanger to a heating terminal such as a floor heating panel (8), a hot water tap (16), etc. A hot water heater (2) that supplies hot water to the use part of the hot water through the hot water supply pipe (17), and circulating water for warm water heating heated by the hot water unit during operation of the hot water unit, in the vicinity of the use part Add hot water from the hot water supply piping. And an immediate hot water function part to keep warm.

  The air conditioning and hot water supply system according to claim 2 is the air conditioning and hot water supply system according to claim 1, wherein the immediate hot water function section includes an immediate hot water heat exchanger (42) provided in a cistern tank of the hot water unit, and A hot water flow path (51) for returning hot water flowing through a hot water supply pipe near the use section to the hot water supply pipe again through the hot water heat exchanger and a direct hot water supply bypassing the hot water heat exchanger. Channel (52), channel switching means (54) for switching the flow of hot water from the water heater to the channel for immediate hot water (51) or directly to the channel for hot water supply, and switching control of the channel switching means And a control means (56).

  The air conditioning and hot water supply system according to claim 3 is the air conditioning and hot water supply system according to claim 1, wherein the immediate hot water function unit is branched from the circulation flow path (73) downstream of the refrigerant versus circulating water heat exchanger. A hot water heat exchanging part (71b) for exchanging heat with hot water of the hot water supply pipe in the middle of the branch, and a circulation flow path upstream of the refrigerant-to-circulating water heat exchanger ( 74) a hot water heating channel (71) that joins the intermediate portion of the hot water, a hot water heating channel control valve (76) that controls the flow of the hot water heating channel, and the hot water heating flow. A temperature sensor (TH5) for detecting the temperature of hot water in the hot water supply pipe heated and maintained by the circulating water of the passage, and at the time of immediate hot water, the heating flow path control valve for immediate hot water is based on the detected temperature of the temperature sensor. It is characterized by comprising control means for controlling.

  The air conditioning and hot water supply system according to claim 4 is characterized in that, in the air conditioning and hot water supply system according to claim 1, the hot water unit is built in furniture with a faucet such as a wash basin (7) or a kitchen sink.

  The air conditioning and hot water supply system according to claim 5 is the air conditioning and hot water supply system according to any one of claims 1 to 4, wherein a cooling switch for instructing a cooling operation by the indoor unit, an immediate hot water switch (61), and the cooling When the cooling operation is instructed from the switch, the outdoor unit is set to a cooling operation mode, and when the immediate hot water switch is turned ON, the control unit is configured to set the outdoor unit to a heating operation mode, When both the cooling operation instruction from the cooling switch and the immediate hot water switch are turned on, the outdoor unit is set to the cooling operation mode or the heating operation mode according to the operation of the switch on the side operated first. It is characterized by that.

  According to the present invention, since hot water is heated with the refrigerant from the heat pump type outdoor unit at the time of instant hot water, it is possible to reduce the running cost such as the electric bill as compared with the heating of the electric heater or the like. it can. Moreover, since a refrigerant-to-circulating water heat exchanger that supplies warm circulating water to a heating terminal such as a floor heating panel is used, it is easy to install a hot water unit equipped with a refrigerant-to-circulating water heat exchanger. Can be secured.

  In addition, since it has a control means for operating the flow path switching mechanism to switch from the immediate hot water flow path directly to the hot water supply flow path, the heat of the circulating water for heating is In contrast, it is possible to prevent the heat on the hot water supply side from being absorbed on the circulating water side for heating. As a result, heating and hot water supply can be performed efficiently.

  And since the hot water heating flow path control valve is controlled according to the water temperature of the hot water flow path heated by the circulating water, the circulating water for heating flows unnecessarily in the heating flow path for the hot water. This can be prevented. Therefore, it is not necessary to operate the outdoor unit continuously for a long time, and the power cost can be reduced.

  In addition, since it is not necessary to install a heat source for instant hot water other than the hot water unit (for example, an auxiliary heat source such as an electric boiler), the hot water unit can be easily built into furniture with a faucet such as a wash basin or kitchen sink. can do.

  Further, if the operation mode of the outdoor unit is frequently switched, it may cause a failure of the outdoor unit. However, in the cooling and heating hot water supply system according to claim 5, both the instruction of the cooling operation of the cooling switch and the ON of the immediate hot water switch are performed. If the outdoor unit is in the cooling operation mode or heating operation mode according to the operation of the switch on the side operated earlier, the outdoor unit will fail as much as possible by frequently switching the operation mode. Can be prevented. For example, even when the immediate hot water switch is turned on in the cooling operation mode, the operation mode is not switched to frequently and the operation mode can be prevented from being frequently switched.

  In the air conditioning and hot water supply system, heat exchange with the refrigerant from the heat pump type outdoor unit is aimed at reducing the running cost such as electricity bill and facilitating the installation of the hot water unit that supplies the circulating water for heating to the heating terminal. The circulating water heated by the water was realized by heating the hot water in the pipe between the hot water supply unit and the utilization part such as a hot water tap. Moreover, when the hot water supply from the hot water heater is started, the flow path switching means is actuated so that the flow from the hot water heater to the hot water tap is changed from the flow path for the hot water via the hot water heat exchanger. By bypassing the heat exchanger, the hot water from the water heater can be switched to the direct hot water flow path that flows directly to the hot water tap, so the hot water is absorbed by the hot water side after the hot water is supplied from the water heater This can be prevented as much as possible. In addition, the flow of circulating water in the hot water heating channel that heats the hot water channel from the water heater to the hot water tap is appropriately controlled by the control valve according to the water temperature of the hot water channel heated by the circulating water. Thus, the running cost can be reduced without wastefully heating the hot water in the pipe between the water heater and the hot water tap.

  Next, a first embodiment of an air conditioning and hot water supply system according to the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram of an air-conditioning / heating system according to an embodiment of the present invention. FIG. 2 is a schematic circuit diagram of the air conditioning and hot water supply system of FIG. FIG. 3 is an input / output diagram of the control device. FIG. 4 is a flowchart of the operation of instant hot water. 5A and 5B are refrigerant circuit diagrams of the outdoor unit, in which FIG. 5A is a diagram in a state in a heating operation mode, and FIG. 5B is a diagram in a state in a cooling operation mode. In FIG. 3, only main components of the input / output of the control device are shown, and other various components are also connected to the control device.

  First, the overall configuration will be described with reference to FIG. In FIG. 1, an outdoor unit 1 and a water heater 2 are installed outdoors, while an indoor unit 6 for air conditioning, a wash basin 7 as a faucet, a hot water floor heating panel 8 as a heating terminal, a main remote controller 9 and A floor heating controller 11 is installed indoors. The outdoor unit 1 and the indoor unit 6 are connected by a refrigerant pipe and constitute a heat pump type air conditioner. Then, the refrigerant from the outdoor unit 1 is discharged to the indoor unit 6 and the hot water unit 12 in the wash basin 7 and returns to the outdoor unit 1 again and circulates. The refrigerant from the outdoor unit 1 heats the circulating water for heating in the hot water unit 12 so that the heated circulating water appropriately flows into the floor heating panel 8 and reaches the room temperature set by the floor heating controller 11. The floor is heated.

  In addition, a hot water supply pipe 17 and a water pipe 18 from the water heater 2 are connected to the hot water tap 16 of the wash basin 7 serving as a utilization section. The hot-water tap 16 has a built-in thermo valve, and hot water is supplied to a temperature set by the user by appropriately mixing hot water from the water heater 2 and water from the water pipe 18. In the state where the hot water tap 16 is closed for a long time, the hot water in the hot water supply pipe 17 dissipates heat and the temperature decreases, and the water discharged from the hot water tap 16 when the hot water tap 16 is opened. The temperature is lower than the optimum temperature. Therefore, when the hot-water tap 16 is opened, the water heated and kept with the circulating water of the hot water unit 12 is supplied to the hot-water tap 16, and water at an appropriate temperature is discharged almost immediately.

Next, a more specific configuration will be described.
The heat pump type outdoor unit 1 includes the refrigeration cycle illustrated in FIG. 5, and can be switched between the heating operation mode of FIG. 5A and the cooling operation mode of FIG. 5B. In the heating operation mode of FIG. 5A, the compressor 21 compresses a gaseous refrigerant (for example, R410A, R22, CO _2, etc.) to generate a high-temperature refrigerant, and this refrigerant is passed through the four-way switching valve 22. Through the first refrigerant port 23, and returns to the second refrigerant port 24 after going around the indoor unit 6 and the hot water unit 12. The refrigerant that has returned to the second refrigerant port 24 flows into an electromagnetic expansion valve 26 that serves as a decompression device. Then, the refrigerant that has expanded at the expansion valve 26 and has reached a low temperature flows into the refrigerant-to-air heat exchanger 27. In the heat exchanger 27, the refrigerant is warmed by exchanging heat with the outside air. The refrigerant whose temperature has risen returns to the compressor 21 via the four-way switching valve 22. In this way, in the heating operation mode, the outdoor unit 1 can supply a high-temperature refrigerant to the indoor unit 6 and the hot water unit 12.

  On the other hand, in the cooling operation mode of FIG. 5B, the four-way switching valve 22 is switched, and the gaseous refrigerant discharged from the compressor 21 flows into the heat exchanger 27 through the four-way switching valve 22. In the heat exchanger 27, the refrigerant is cooled by exchanging heat with the outside air and flows into the expansion valve 26. And the refrigerant | coolant which expand | swelled with the expansion valve 26 and became low temperature discharges outside from the 2nd refrigerant | coolant port 24, and returns to the 1st refrigerant | coolant port 23 after visiting the indoor unit 6. FIG. The refrigerant that has returned to the first refrigerant port 23 returns to the compressor 21 via the four-way switching valve 22. In this way, in the cooling operation mode, the outdoor unit 1 can supply a low-temperature refrigerant to the indoor unit 6 and the like. And the outdoor unit 1 switches the four-way switching valve 22 which is a refrigerant | coolant flow path switching mechanism, and the refrigerant | coolant from the compressor 21 is a heating terminal, such as the hot water unit 12, the expansion valve 26, and the heat exchanger 27 in order. The heating operation mode that flows and returns to the compressor 21 again, and the refrigerant from the compressor 21 flows in the order of the air conditioning terminals such as the heat exchanger 27, the expansion valve 26, and the indoor unit 6 and returns to the compressor 21 again. It can be switched to the cooling operation mode that comes.

  The indoor unit 6 and the hot water unit 12 are connected in parallel to the refrigerant ports 23 and 24 of the outdoor unit 1. The hot water unit 12 is provided with a refrigerant-to-circulatory water heat exchanger 31 and the refrigerant from the outdoor unit 1 flows. The thermistor TH1, which is a temperature sensor, detects the temperature of the refrigerant. Moreover, the circulating water for heating heated by the heat exchange with a refrigerant | coolant flows through the refrigerant | coolant versus circulating water heat exchanger 31. FIG. And in the hot water unit 12, the circulating water from the refrigerant | coolant versus circulating water heat exchanger 31 flows, and the outgoing channel 34 by which the water outlet 33 for heating terminals is provided in the edge part, and the heating terminal in the edge part A return flow path 37 through which circulating water to the refrigerant-to-circulation water heat exchanger 31 flows, and a bypass flow path 38 that connects the forward flow path 34 and the return flow path 37. A circulation pump 39 for circulating the circulating water is provided. The forward flow path 34 and the return flow path 37 constitute a circulation flow path. The forward flow path 34 and the return flow path 37 are provided with thermistors TH2 and TH3, respectively. Further, a cistern tank 41 which is a so-called expansion tank is provided in the return flow path 37. A heating tank 42 is built in the cistern tank 41, and the circulating water in the cistern tank 41 heats and keeps the water in the heating tank 42 by heat exchange. The heating tank 42 functions as a heat exchanger for instant hot water.

  Each end of the piping of the floor heating panel 8 is connected to the water outlet 33 and the water return port 36 of the hot water unit 12, and the circulating water from the water outlet 33 is circulated through the floor heating panel 8 and then the water return port 36. Come back to. The piping connecting the floor heating panel 8 and the hot water unit 12 is provided with a thermal valve 46, and the thermal valve 46 controls the flow of circulating water in the floor heating panel 8 on and off. The water outlet 33 and the water return port 36 of the hot water unit 12 are closed with a plug or the like when the floor heating panel 8 is not connected.

  In the middle of the piping of the hot water supply pipe 17, both ends of an immediate hot water flow path 51 for diverting the flow from the water heater 2 to the hot water tap 16 to the heating tank 42 are connected. The immediate hot water flow channel 51 includes an outward flow channel 51 a from the hot water supply pipe 17 to the heating tank 42 and a return flow channel 51 b from the heating tank 42 to the hot water supply pipe 17. In the hot water supply pipe 17, the pipe between the connection portion of the forward flow path 51 a and the connection portion of the return flow path 51 b is a direct hot water supply flow path 52. A hot water supply channel switching valve 54 is provided as a channel switching means for switching between the channel 51 side and the direct hot water supply channel 52 side. The hot water supply channel switching valve 54 is constituted by an electric on-off valve. In addition, a thermistor TH4 is provided immediately upstream of the direct hot water supply passage 52, and detects the temperature of the water flowing into the immediate hot water passage 51.

  And the control apparatus 56 which is a control means of an air-conditioning / hot-water supply system is comprised by the microcomputer. Various electric parts are connected to the control device 56. As shown in FIG. 3, the main electric remote controller 9, the floor heating controller 11 and the outdoor unit 1 are connected so that input / output is possible as main electric parts. Has been. Further, various thermistors TH1 to TH4, which are temperature sensors, are connected to the input side of the control device 56, and the thermal valve 46, the hot water supply channel switching valve 54, the circulation pump 39, and the like are connected to the output side. The control device 56 has a built-in timer, which can measure elapsed time and the like, and stores a control program. Further, various setting values are set in the control device 56 in advance.

The air conditioning and hot water supply system of the embodiment configured as described above can perform operations of floor heating, instant hot water and air conditioning of indoor units. Each operation will be described below.
First, the operation of floor heating will be described.
By operating the floor heating switch 58 of the main remote controller 9, a floor heating start / stop signal is output from the main remote controller 9 to the control device 56. Further, the temperature of the circulating water supplied to the floor heating panel 8 is set by the main remote controller 9. When the floor heating operation signal is output from the main remote controller 9 to the control device 56, the control device 56 instructs the outdoor unit 1 to perform the heating operation. Then, the outdoor unit 1 enters the heating operation mode illustrated in FIG. 5A and the compressor 21 is operated to discharge a high-temperature refrigerant to the refrigerant-to-circulating water heat exchanger 31. In the refrigerant-to-circulated water heat exchanger 31, the circulating water is heated by heat exchange with the refrigerant. Further, the circulation pump 39 is activated by the operation signal from the control device 56, and the heated circulating water circulates through the outgoing flow path 34, the floor heating panel 8 and the return flow path 37. In this manner, the floor heating operation is performed by circulating the heated circulating water to the floor heating panel 8. At this time, the control device 56 controls the operation output of the outdoor unit 1 so that the detected temperature of the thermistor TH2 becomes a set temperature (for example, 40 to 60 ° C.) set in the main remote controller 9.

  Then, the floor heating controller 11 compares the room temperature detected by the built-in room temperature sensor with the set room temperature set in the floor heating controller 11, and according to the temperature difference, the ON- An ON-OFF cycle variable signal for changing the OFF cycle is output to the control device 56. In response to this signal, the controller 56 opens and closes the thermal valve 46 to control the circulating water to the floor heating panel 8 so that the room temperature becomes the set room temperature.

Next, the operation of instant hot water will be described based on the flowchart of FIG.
In step 1, when the immediate hot water switch 61 of the main remote control 9 is turned on, an immediate hot water operation signal is output from the main remote control 9 to the control device 56. In step 2, when the control device 56 receives the immediate hot water operation signal, it outputs a close signal to the hot water supply channel switching valve 54, an operation signal to the circulation pump 39, and instructs the outdoor unit 1 to perform a heating operation. Then, the outdoor unit 1 enters the heating operation mode illustrated in FIG. 5A and the compressor 21 is operated to discharge a high-temperature refrigerant to the refrigerant-to-circulating water heat exchanger 31. In the refrigerant-to-circulated water heat exchanger 31, the circulating water is heated by heat exchange with the refrigerant. In addition, the circulation pump 39 is activated by the operation signal from the control device 56, and the heated circulating water flows in the forward flow path 34 and the floor heating panel 8 (or when the thermal valve 46 is closed, the bypass flow. Circulate the path 38) and the return channel 37. At this time, the heated circulating water flows to the cistern tank 41 provided in the return flow path 37, and the water in the heating tank 42 disposed in the cistern tank 41 is heated and kept warm by this circulating water. Further, the control device 56 controls the operation output of the outdoor unit 1 so that the detected temperature of the thermistor TH2 or the thermistor TH3 becomes a preset temperature.

  In step 3, when the user operates the hot water tap 16 to supply hot water, the hot water supply channel switching valve 54 is closed, so that the hot and warm water in the heating tank 42 reaches the hot water tap 16. The hot water and the water from the water pipe 18 are mixed, and the set warm water is discharged almost immediately.

  As time passes, the cooled water in the hot water supply pipe 17 flows to the hot water tap 16 through the heating tank 42, and the hot water from the water heater 2 reaches the thermistor TH4. In step 4, the controller 56 determines whether or not the detected temperature of the thermistor TH4 has reached a preset switching set temperature. If it is determined that the detected temperature has reached the switching set temperature, in step 5, the hot water supply An open signal is output to the water channel switching valve 54 to switch the flow from the hot water heater 2 directly from the hot water flow channel 51 to the hot water flow channel 52. Thereafter, hot water from the water heater 2 is supplied to the hot water tap 16.

Next, the air conditioning operation of the indoor unit will be described.
When the indoor unit 6 is operated during the floor heating operation and the immediate hot water operation, warm air can be blown out from the indoor unit 6 and heated. Further, when the cooling switch (not shown) of the indoor unit 6 is operated and the indoor unit 6 instructs the outdoor unit 1 to enter the cooling operation mode, the outdoor unit 1 enters the cooling mode, and the low temperature from the outdoor unit 1 is reduced. The refrigerant circulates in the indoor unit 6. And it can cool by blowing cold air from the indoor unit 6. However, since the outdoor unit 1 can only have one of the cooling operation mode and the heating operation mode, the floor heating operation, the hot water operation, and the heating operation by the indoor unit 6 can be performed simultaneously. The operation, the hot water operation, and the cooling operation by the indoor unit 6 cannot be performed at the same time. Therefore, the microcomputer in the outdoor unit 1 serving as the control means operates in the direction of the cooling operation mode instruction from the cooling switch of the indoor unit 6 or the instruction of the heating operation mode from the control device 56, whichever is output first. Operates according to mode.

In this way, when the immediate hot water switch 61 is turned on, the control device 56 serving as a control means puts the outdoor unit 1 into the heating operation mode, and directs the flow from the hot water heater 2 directly from the hot water supply flow path 52. When the detected temperature of the thermistor TH4, which is a temperature sensor for detecting the temperature of the water flowing directly into the hot water supply passage 52 and the means for switching to the passage 51, reaches the switching set temperature, the flow from the hot water heater 2 is immediately passed from the hot water supply passage 51. Means for switching directly to the hot water supply passage 52 is provided.
Thus, the control device 56 as the control means, the microcomputer in the outdoor unit 1 and the like include means for executing each process corresponding to each process to be executed, in addition to the above means.

  Next, Example 2 of the air conditioning and hot water supply system in the present invention will be described with reference to FIG. FIG. 6 is a schematic circuit diagram of an air conditioning and hot water supply system according to a second embodiment. In the description of the second embodiment, components corresponding to those of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 6 is a diagram corresponding to FIG. 2 of the first embodiment. In the second embodiment, the heating tank 42, the hot water flow channel 51, the hot water supply channel switching valve 54, and the thermistor TH4 of the first embodiment are not provided. Instead, the refrigerant-to-circulatory water heat exchanger 31 and the floor heating are used. A heating channel 71 for hot water is branched from a circulation channel that circulates between the panel 8. That is, the forward flow path 71a of the heating channel 71 for the hot water is branched from the intermediate portion of the forward flow path 73 from the refrigerant to circulating water heat exchanger 31 to the floor heating panel 8, and the other end of the forward flow path 71a. The section is connected to the end of an instant hot water heat exchanging portion 71b for exchanging heat with the water in the hot water supply pipe 17 forming the hot water supply passage, and is immediately connected to the other end of the instant hot water heat exchanging portion 71b. A return channel 71c of the hot water heating channel 71 is connected. The other end of the return flow path 71c is connected to an intermediate portion of the return flow path 74 from the floor heating panel 8 to the refrigerant-to-circulation water heat exchanger 31. Accordingly, the circulating water from the refrigerant-to-circulated water heat exchanger 31 flows into the forward flow path 71a of the immediate hot water heating path 71 via the forward flow path 73, and the hot water supply pipe 17 in the immediate hot water heat exchanger 71b. After exchanging heat with the hot water, the refrigerant flows through the return flow path 71 c of the immediate hot water heating flow path 71 and returns to the refrigerant-to-circulation water heat exchanger 31 via the return flow path 74. This flow is controlled by a control valve 76 provided in the forward flow path 71a. Further, a thermistor TH5 for detecting the temperature of the water in the hot water supply pipe 17 in the immediate hot water heat exchanging portion 71b is provided.

  The thermistor TH5 is connected to the input side of the control device 56, and the control valve 76 is connected to the output side of the control device 56. When the hot water switch 61 is turned on, the circulating water is heated by heat exchange with the refrigerant from the outdoor unit 1 in the refrigerant-to-circulated water heat exchanger 31 as in the first embodiment. Further, an opening signal is output from the control device 56 to the control valve 76, and the control valve 76 is opened. Accordingly, the circulating water heated by the refrigerant-to-circulating water heat exchanger 31 is circulated by the circulation pump 39 through the forward flow paths 73 and 71a, the hot water heat exchanger 71b, and the return flow paths 71c and 74. Then, the circulating water in the hot water heat exchanger 71b heats and keeps the water in the hot water supply pipe 17 up to, for example, about 50 ° C. The temperature of water in the hot water supply pipe 17 in the hot water heat exchanging portion 71b is detected by the thermistor TH5, and when the detected temperature reaches a preset hot water heating stop set temperature, for example, the aforementioned 50 ° C., the control device 56 closes the control valve 76 and stops the circulation pump 39. When the control valve 76 is closed, the immediate hot water heat exchanging portion 71b gradually radiates natural heat, so that the controller 56 opens the control valve 76 and circulates every predetermined time (for example, one hour). The pump 39 is operated to heat and heat the water in the hot water supply pipe 17. Further, instead of heating every predetermined time, when the temperature detected by the thermistor TH5 reaches the set temperature for starting the hot water heating (for example, about 30 ° C. lower than the aforementioned about 50 ° C.), the control device 56 opens the control valve 76. At the same time, the circulation pump 39 can be operated.

  The instant hot water switch 61 can be turned on manually, but depending on the timer setting, the required time zone (for example, from 6 am to 9 am and from 5 pm to 10 pm) It is also possible to make the instant hot water function work. In this way, usability can be improved.

  As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various change is performed within the range of the summary of this invention described in the claim. It is possible. Examples of modifications of the present invention are illustrated below.

(1) If a control means can control the various components of an air-conditioning / hot-water supply system, it can also be comprised with the control apparatus 56 single-piece | unit of the hot water unit 12, and the outdoor unit 1, the indoor unit 6, It is also possible to configure so that the control device 56 interlocks with the microcomputer provided in the main remote controller 9, the floor heating controller 11, the floor heating panel 8, and the like.
(2) The hot water supply channel switching valve 54 of the first embodiment may be an electric on-off valve, or may be configured by a three-way switching valve, a thermal valve, or the like.
(3) The indoor unit 6 is not necessarily provided.
(4) The heating terminal may be other than the floor heating panel 8, for example, a heat panel or a warm air device.
(5) The arrangement position of the thermistors TH1 to TH5 can be changed as appropriate.
(6) In the second embodiment, as in the first embodiment, the thermistor TH4 is provided in the hot water supply pipe 17, the temperature of the water in the hot water supply pipe 17 to the immediate hot water heat exchanging portion 71b is detected, and this detected temperature is set. It is also possible to control the air conditioning and hot water supply system based on this.
(7) Without providing the thermistor TH5 for detecting the temperature of the water in the hot water supply pipe 17 in the hot water heat exchange section 71b, the thermistors TH2 and 3 allow the water in the hot water supply pipe 17 in the hot water heat exchange section 71b to be used. It is also possible to detect and estimate the temperature. That is, when the cooled circulating water from the immediate hot water heat exchanging portion 71b flows into the return flow path 74 and the forward flow path 73, the detection temperature of the thermistors TH2 and 3 fluctuates. Due to the fluctuation, the temperature of the water in the hot water supply pipe 17 in the hot water heat exchanging portion 71b can be estimated, and the time for flowing the circulating water for heating to the hot water heat exchanging portion 71b can be determined.

  By circulating and heating the hot water between the water heater and the hot water tap with the circulating water heated by the refrigerant from the outdoor unit, the hot water can be used at an appropriate temperature as soon as the hot water tap is opened. Water can be used for heating terminals such as floor heating panels. Therefore, the present invention can be applied to uses such as furniture with a faucet such as a wash basin and a kitchen sink, where it is necessary to immediately use hot water at an appropriate temperature when the hot water tap is opened. In particular, it is most suitable for applications that require heating such as floor heating and air conditioning by indoor units together with such instant hot water.

FIG. 1 is a schematic diagram of an air-conditioning / heating system according to an embodiment of the present invention. FIG. 2 is a schematic circuit diagram of the air conditioning and hot water supply system of FIG. FIG. 3 is an input / output diagram of the control device. FIG. 4 is a flowchart of the operation of instant hot water. 5A and 5B are refrigerant circuit diagrams of the outdoor unit, in which FIG. 5A is a diagram in a state in a heating operation mode, and FIG. 5B is a diagram in a state in a cooling operation mode. FIG. 6 is a schematic circuit diagram of an air conditioning and hot water supply system according to a second embodiment.

Explanation of symbols

TH5 thermistor (temperature sensor)
1 Outdoor unit 2 Water heater 6 Indoor unit 7 Wash-stand (furniture with faucet)
8 Floor heating panel (heating terminal)
12 Hot water unit 16 Hot water tap (use part)
17 Piping for hot water supply 31 Refrigerant to circulating water heat exchanger 34 Outward flow path (circulation flow path)
37 Return channel (circulation channel)
39 Circulating pump 41 Sisturn tank 42 Heating tank (heat exchanger for instant hot water)
51 Flow path for hot water 52 Direct hot water flow path 54 Hot water supply water path switching valve (flow path switching means)
56 Control device (control means)
61 Immediate hot water switch 71 Heating flow path for immediate hot water 71b Heat exchange section for immediate hot water 73 Outward flow path (circulation flow path)
74 Return channel (circulation channel)
76 Control valve (heating flow control valve for hot water)

Claims (5)

A heat pump type air conditioner in which an indoor unit and an outdoor unit are connected by a refrigerant pipe;
A cistern tank, a circulation pump, a refrigerant-to-circulation water heat exchanger for exchanging heat between the refrigerant from the outdoor unit of the heat pump type air conditioner and the circulating water for hot water heating, and a circulation channel through which the circulating water flows, A hot water unit that circulates and supplies circulating water for hot water heating heated by the refrigerant to the circulating water heat exchanger to a heating terminal such as a floor heating panel;
A water heater that supplies hot water to a use section such as a hot water tap through a hot water supply pipe;
An immediate hot water function unit that heats and keeps hot water in a hot water supply pipe of the hot water heater near the use unit by circulating water for hot water heating heated by the hot water unit during operation of the hot water unit; A featured heating / cooling hot water system. The immediate hot water functioning unit is again connected to the hot water heat exchanger provided in the cistern tank of the hot water unit and hot water flowing through the hot water supply pipe near the utilization unit via the immediate hot water heat exchanger. A flow path for hot water returning to the hot water supply pipe, a direct hot water flow path that bypasses the heat exchanger for immediate hot water, and a flow of hot water from the water heater to the flow path for immediate hot water or directly to the hot water flow path 2. The heating / cooling hot water supply system according to claim 1, comprising a flow path switching means for switching and a control means for switching and controlling the flow path switching means. The hot water function section is provided by branching from a circulation flow path downstream from the refrigerant to the circulating water heat exchanger, and heat for the hot water that exchanges heat with hot water in the hot water supply pipe in the middle of the branch. And a hot water heating channel that joins an intermediate portion of the circulation channel upstream from the refrigerant-to-circulation water heat exchanger, and an immediate hot water control channel that controls the flow of the hot water heating channel. Based on the temperature sensor for detecting the temperature of the hot water in the hot water supply pipe heated and kept warm by the circulating water in the heating channel for the hot water, and the temperature sensor at the time of the hot water The heating / cooling hot water supply system according to claim 1, further comprising control means for controlling the heating flow path control valve for the hot water. The heating and cooling water supply system according to claim 1, wherein the hot water unit is built in furniture with a faucet such as a wash basin or a kitchen sink. When the cooling operation for instructing the cooling operation by the indoor unit, the immediate hot water switch, and the cooling operation from the cooling switch are instructed, the outdoor unit is set to the cooling operation mode, and the immediate hot water switch is turned on, Control means for setting the outdoor unit to a heating operation mode,
When both the cooling operation instruction from the cooling switch and the immediate hot water switch are turned on, the control means sets the outdoor unit in the cooling operation mode or according to the operation of the switch on the side operated first. The heating / cooling hot water supply system according to any one of claims 1 to 4, wherein the heating operation mode is set.

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