KR20160039548A - Hot water supply heating device - Google Patents

Abstract

The present invention provides a technique for suppressing an occurrence of a situation where a heat storage capability and a heating capability are insufficient. In case where a control device (8) operates a compressor (12) and a second pump (64) to simultaneously perform a heat storage operation for storing heat in a tank (62) and a heating operation for operating a first pump (54) to heat an indoor space by a heating terminal (56), a first simultaneous operation of heat storage and heating is performed to operate a switching valve (70) to prevent a heat medium in a first heat medium circulation passage (50) from flowing in a bypath passage (58) to prevent operation of a burner (52) if an indoor temperature is higher than or equal to a heating configuration temperature, and a second simultaneous operation of heat storage and heating is performed to operate the switching valve (70) to allow the heat medium to flow in the bypath passage (58) to operate the burner (52) if the indoor temperature is lower than the heating configuration temperature.

Description

{HOT WATER SUPPLY HEATING DEVICE}

The present invention relates to a hot water heating apparatus.

Patent Document 1 discloses a heat pump that includes a compressor that pressurizes a refrigerant, a heat exchanger that condenses the refrigerant by heat exchange with the heat, a decompression mechanism that decompresses the refrigerant, and an evaporator that evaporates the refrigerant, A heating means for heating the room, a tank for storing the heat of the fruit, a supply means for supplying the hot water to the hot water use portion by using the heat accumulated in the tank, a flow rate of the heat supplied to the heating terminal, There is disclosed a hot water heating apparatus having an adjusting means for adjusting the ratio of the flow rate of the fruit. The hot water heating apparatus drives the heat pump and simultaneously supplies the heat of the heat to both the heating terminal and the tank so as to simultaneously perform heat storage and heating by the heating terminal.

Patent Document 1: JP-A-2010-196950

In the hot water heating apparatus of Patent Document 1, the heat storage ability and the heating ability are determined depending on the capability of the heat pump. However, in the hot-water supply heating apparatus disclosed in Patent Document 1, there is a possibility that a situation in which the heat storage ability and the heating ability are insufficient may occur when the operation is performed simultaneously with heat storage and heating in a severe period, for example.

The present specification provides a technique capable of suppressing occurrence of a situation in which the heat storage ability and the heating ability are insufficient.

The hot water heating apparatus disclosed in this specification includes a compressor for pressurizing a refrigerant, a first heat exchanger for condensing the refrigerant by heat exchange between the first heat and the second heat exchanger, a second heat exchanger for condensing the refrigerant by heat exchange between the second heat, A heat pump including a decompression mechanism that decompresses the refrigerant and an evaporator that evaporates the refrigerant; a heating terminal that heats the room using the heat of the first fruit; and a second heat exchanger that circulates the first fruit between the first heat exchanger and the heating terminal A first pump for circulating a first fruit in a heating circulation path, a heat source for heating a first fruit circulating in the heating circulation path, and a circulation path connecting the upstream side and the downstream side of the first heat exchanger among the heating circulation paths A first bypass passage for bypassing the first heat exchanger and a second bypass passage for bypassing the first bypass passage and the first bypass passage, A tank for storing heat, a supplying means for supplying hot water to the hot water using portion by using the heat accumulated in the tank, and a circulating means for circulating the second fruit between the second heat exchanger and the tank A tank circulation path, a second pump circulating a second fruit in the tank circulation path, and a control device. In the case where the control device simultaneously executes the heat accumulating operation for accumulating heat in the tank by operating the heat pump and operating the second pump and the heating operation for heating the room by the heating terminal by operating the first pump, In the first case in which the temperature of the indoor heat exchanger is not lower than the specific limit value, the switching means is operated in a state in which the first heat in the heating circuit does not flow in the bypass furnace, , The switching means is caused to perform the second operation in which the first heat source in the heating circulation path flows through the bypass path to operate the heat source.

In the above hot water heating apparatus, when the heat storage operation into the tank and the heating operation are performed simultaneously, the second case in which the indoor temperature is lower than the specific limit value is lower than the first case in which the indoor temperature is higher than the specific limit value The required heating capacity is high. In such a second case, if the heat storage ability and the heating ability are provided only by the heat pump, there is a possibility that the heat storage ability and the heating ability are insufficient. In this regard, the hot water heating apparatus performs the second operation in the second case. By performing the second operation, the heat of the first heat supplied to the heating terminal can be supplied by the heat source, and all the heat of the heat pump can be supplied into the tank. Particularly, when the fuel is combusted, the heating ability of the heat source (i.e., the heating amount per unit time) is higher than that of the heat pump. As a result, it is easy to secure sufficient heat storage ability and heating ability compared to a situation in which the heat storage ability and the heating ability must be procured only by the heat pump. Therefore, in the second case where the heating capacity required in the above-described hot water heating apparatus is higher than that in the first case, it is possible to suppress occurrence of a situation in which the necessary heat storage ability and heating capacity are insufficient.

1 is a diagram schematically showing a configuration of a hot water heating system 2;
2 is a diagram schematically showing a state of heat storage-only operation in the hot water heating system 2;
Fig. 3 is a diagram schematically showing the state of the first heating alone (i.e., heating alone operation when the room temperature is equal to or higher than the set heating temperature) in the hot water heating system 2. Fig.
Fig. 4 is a diagram schematically showing the state of the second heating alone (i.e., heating alone operation when the indoor temperature is lower than the set heating temperature) in the hot water heating system 2. Fig.
5 is a diagram schematically showing the state of the first heat accumulation heating simultaneous operation in the hot water heating system 2 (that is, the simultaneous heat accumulation heating operation when the indoor temperature is equal to or higher than the set heating temperature).
6 is a diagram schematically showing the state of the second heat accumulation heating simultaneous operation in the hot water heating system 2 (that is, the simultaneous heat accumulation heating operation when the indoor temperature is lower than the set heating temperature).
7 is a flowchart showing the regenerative heating control process executed by the control device 8. Fig.

The main features of the embodiments described below are listed and recorded. In addition, the technical elements described below are independent technical elements and exert their technical usefulness individually or in various combinations, and are not limited to combinations of the claims described in the application.

(Feature 1)

It is preferable that the control device is configured so that the number of revolutions per unit time of the first pump when performing the first operation is smaller than the number of revolutions per unit time of the first pump when performing the second operation.

As described above, the first case, in which the first operation is executed, has a low heating capacity required. Therefore, by reducing the number of revolutions per unit time of the first pump when the first operation is executed, the amount of heat per unit time (i.e., the heating capacity by the heating terminal) applied to the first fruit in the first heat exchanger And the amount of heat per unit time applied to the second fruit in the second heat exchanger can be increased. The amount of heat accumulated in the tank can be sufficiently secured when the first operation is performed. In the second case of performing the second operation, the required heating capability is high. As described above, when the second operation is performed, the switching means is operated so that the first heat in the heating circulation path flows through the bypass path, and the heat pump, the heat source, the first pump and the second pump are operated. That is, the heat of the refrigerant can be given only to the second heat. As a result, even when the second operation is performed, the amount of heat accumulated in the tank can be sufficiently secured.

(Feature 2)

The control device does not perform the heat accumulation operation but operates the heat pump and operates the first pump so as to perform the heating operation for heating the room by the heating terminal alone, In the third case, the switching means is switched to a state in which the first fruit in the heating circuit does not flow through the bypass furnace to perform the third operation in which the heat source is not operated. In the fourth case in which the indoor temperature is lower than the specific threshold value, It is preferable to perform the fourth operation in which the first heat source in the heating circulation path does not flow through the bypass furnace to operate the heat source.

According to this configuration, when the heating operation is performed alone, the fourth case in which the indoor temperature is lower than the specific limit value is higher than the third case in which the indoor temperature is higher than the specific threshold value . In such a fourth case, if the heat pump is supplied only by the heat pump, there is a possibility that the heating capacity is insufficient. In this regard, according to the above configuration, the hot water heating apparatus executes the fourth operation in the fourth case. By performing the fourth operation, heat of the first heat supplied to the first heating terminal can be supplied by both the heat pump and the heat source. In other words, it is easy to secure a sufficient heating capacity as compared with a case in which the heating capacity must be procured only by the heat pump. Therefore, in the fourth case where the heating capacity required in the above hot water heating apparatus is higher than that in the third case, it is possible to suppress occurrence of a situation in which the required heating capacity is insufficient.

(Feature 3)

An indoor air heat exchanger in which the heat pump condenses the refrigerant by heat exchange with the room air, a flow rate of the refrigerant supplied to the indoor air heat exchanger, and a flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger And the control device is configured so that the ratio of the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger in the case where the heat accumulation operation and the heating operation are simultaneously performed as in the first case and the second case It is preferable to operate the adjusting means such that the ratio of the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger when the heating operation is performed alone as in the third and fourth cases.

As described above, the first case and the second case are cases of heating the room and increasing the amount of heat in the tank. According to the above arrangement, in such a case, it is possible to supply the refrigerant at a larger flow rate to the first heat exchanger and the second heat exchanger at a larger flow rate than the flow rate of the refrigerant supplied to the indoor air heat exchanger. That is, the heat of the refrigerant can be supplied to the tank more than the third and fourth cases in which the amount of heat in the tank need not be increased. Therefore, according to this configuration, it is possible to adequately heat the room while appropriately performing heat storage in the tank.

(Example)

(System configuration: Fig. 1)

1, the hot water heating system 2 of the present embodiment includes a heat pump air conditioner 4, a floor heating device 6, a hot water supply device 7, and a control device 8 .

The heat pump air conditioner 4 performs heat absorption from outdoor air and heat radiation to indoor air using a refrigerant (for example, HFC refrigerant such as R32 or R410 or CO ₂ refrigerant such as R744). The heat pump air conditioner 4 includes a compressor 12, a flow control valve 14, a heat exchanger 16, a first expansion valve 18, an outdoor air heat exchanger 20, An indoor air heat exchanger 26, a second fan 28, a second expansion valve 30, and a refrigerant circulation path 32. The indoor heat exchanger 26,

The compressor 12 compresses the refrigerant in the gas phase and sends it out. The flow regulating valve 14 has three ports e, f and g, and it is possible to supply the gaseous refrigerant supplied from the compressor 12 to the port e to the ports f and g. The flow regulating valve 14 controls the flow rate of the refrigerant flowing from the port e to the port f (that is, the refrigerant supplied to the heat exchanger 16) and the refrigerant flowing from the port e to the port g The refrigerant supplied to the compressor 26) can be adjusted. The heat exchanger 16 exchanges heat between the heat passing through the first heat transfer path 50 and the refrigerant passing through the heat transfer path 32, And the refrigerant passing through the refrigerant circulation path (32). The first expansion valve 18 adiabatically expands and decompresses the refrigerant in the liquid phase state. The outdoor air heat exchanger (20) performs heat exchange between the outdoor air blown by the first fan (22) and the refrigerant. The outdoor air heat exchanger (20) and the first fan (22) are disposed outdoors. In the vicinity of the first fan (22), an outside temperature thermistor (40) for detecting the outside temperature is provided.

The indoor air heat exchanger (26) performs heat exchange between the indoor air blown by the second fan (28) and the refrigerant. The indoor air heat exchanger 26 and the second fan 28 are indoor and are disposed at higher positions in the room than the heating terminal 56 (i.e., the floor heating terminal) described later. In the vicinity of the second fan (28), there is provided an indoor temperature thermistor (42) for detecting the indoor temperature. The second expansion valve (30) adiabatically expands and decompresses the liquid refrigerant.

The refrigerant circulation path 32 is connected to the refrigerant circulation path 32. The refrigerant circulation path 32 includes a compressor 12, a flow rate regulating valve 14, a heat exchanger 16, a first expansion valve 18, an outdoor air heat exchanger 20, The heat exchanger (26) and the second expansion valve (30).

The floor heating device 6 performs heat dissipation (so-called floor heating) into room air using a heat (e.g., water, antifreeze, etc.). The floor heating device 6 includes a heat exchanger 16, a first heat transfer path 50, a burner 52, a first pump 54, a heating terminal 56, a bypass path 58 And a switching valve 70 are provided. The first fruit circulation path 50 circulates the fruit between the heat exchanger 16, the burner 52 and the heating terminal 56. The burner 52 heats the heat passing through the first heat transfer path 50 by using the combustion heat generated by burning fuel such as gas. The burner 52 is located at a position downstream of the first heat transfer passage 50 and downstream of the heat exchanger 16 and is capable of heating the heat passing through a portion on the upstream side of the heating terminal 56. [ The first pump (54) circulates the fruit in the first fruit circulation path (50). The heating terminal 56 dissipates the heat of the heat to the room air. The heating terminal 56 is a floor heating terminal disposed on the floor of the room. The heating terminal 56 is provided on the downstream side of the first heat exchanger 50 and the burner 52 in the first heat transfer path 50. As a result, the heating terminal 56 is supplied with the heat after being heated by the heat exchanger 16 and the burner 52. The heat exchanger (16) is provided on a portion of the first heat transfer path (50) upstream of the heating terminal (56). The heat exchanger (16) is supplied with low temperature heat after being discharged to the heating terminal (56). The bypass path 58 has an upstream end connected between the downstream side of the heat exchanger 16 and the upstream side of the burner 52 in the first heat transfer path 50 and the downstream end, Is connected between the heating terminal 56 in the first heat exchanger 50 and the downstream side of the first pump 54 and the upstream side of the heat exchanger 16. The switching valve 70 is fitted to the connecting portion between the upstream end of the bypass path 58 and the first heat transfer path 50. The switching valve 70 has three ports h, i and j. The switching valve 70 is opened when the heat in the first heat transfer path 50 is supplied to the heat exchanger 16 and the heat exchanger 16 is in a state in which it does not pass through the bypass path 58 And a state in which the heat passes through the bypass path 58 and is not supplied to the heat exchanger 16 (i.e., the state in which the port i and the port j communicate).

The hot water supply device 7 heats the water in the tank 62 using heat of a heat (e.g., water, antifreeze, etc.) and supplies the hot water stored in the tank 62 to the hot water supply point. The water heater 7 is provided with a second heat transfer path 60, a tank 62, a tank thermistor 63, a second pump 64, a hot water supply pipe 66 and a water introduction pipe 68 . The second heat transfer path (60) circulates the heat between the heat exchanger (16) and the tank (62). The tank 62 stores the water used in the water heater 7. The tank 62 is of a closed type, and is covered on the outside by a heat insulating material. The tank 62 is provided with a second heat transfer path 60. The heat in the tank 62 is heated by performing heat exchange between the heat in the second heat transfer path 60 passing through the tank 62 and the water in the tank 62. The second pump (64) circulates the fruit in the second fruit circulation path (60). The hot water supply pipe 66 has an upstream end connected to the upper portion of the tank 62. The downstream end side of the hot water supply pipe 66 is disposed at a location where hot water is used. The hot water supply pipe 66 supplies the hot water in the tank 62 to the hot water utilization site in accordance with the operation of the user (for example, the operation of opening the karan (faucet)). The upstream end of the water introduction pipe 68 is connected to a water supply (not shown), and the downstream end is connected to the lower portion of the tank 62. When the hot water in the tank 62 is supplied to the hot water utilization site from the hot water supply pipe 66, the water introduction pipe 68 introduces the same amount of water as the amount of hot water supplied to the hot water utilization site into the tank 62 from the tap water . As a result, water is stored in the tank 62 up to full capacity at all times. The tank thermistor 63 detects the temperature of the water in the tank 62.

The control device 8 includes a CPU, a ROM, and a RAM. Various operating programs are stored in the ROM. Various signals input to the control device 8 and various data generated in the course of executing processing by the CPU are temporarily stored in the RAM. In the control device 8, the CPU controls the operation of the components of the heat pump air conditioner 4, the floor heating device 6, and the hot water supply device 7 based on the information stored in the ROM or the RAM. A remote control (not shown) is connected to the control device 8. [ The remote control is provided with a switch for the user to operate the hot water supply heating system 2 and a liquid crystal display for indicating the operation state of the hot water supply heating system 2 to the user. The user can instruct the start and end of heating through the remote controller. In addition, the user can set the heating set temperature through the remote controller.

[Operation of the hot water heating system 2]

Next, the operation of the hot water heating system 2 will be described. The hot water supply heating system 2 is a system in which hot water supply operation, thermal storage alone operation, heating alone operation (i.e., the first heating operation alone, the second heating operation alone) and the simultaneous operation of thermal storage and heating (i.e., Heating simultaneous operation) can be executed.

(Hot water operation)

The hot water supply system (2) starts the hot water supply operation when the user opens the car or the hot water supply to the bathtub. The water supply to the bathtub may be initiated by the user pressing the water supply start switch of the remote controller or may be initiated by the user on the basis of the water supply supply completion time set on the remote controller have. The hot water supply operation can be executed in parallel with the thermal storage single operation, the heating single operation, and the storage heat simultaneous operation described later. In the hot water supply operation, the hot water heating system 2 supplies the hot water in the tank 62 to the hot water use place through the hot water supply pipe 66.

(Heat storage single operation; Fig. 2)

When no heating is instructed from the user and a request for storing heat to the tank 62 occurs, the hot water heating system 2 executes the heat storage single operation. The heat storage request is generated when, for example, the amount of heat in the tank 62 is reduced as a result of executing the hot water supply operation. Specifically, the heat storage request occurs when the temperature detected by the tank thermistor 63 becomes lower than a predetermined heat storage start temperature. In the heat storage single operation, the water in the tank 62 is boiled up to a predetermined heat storage termination temperature and stored in the tank 62. 2, the controller 8 controls the flow rate regulating valve 14 such that the total flow rate of the refrigerant supplied to the port e is supplied to the port f and the refrigerant is not supplied to the port g, (That is, port e and port f communicate with each other, and port e and port g do not communicate). In addition, the control device 8 drives the first fan 22 and the compressor 12 as well. In addition, the control device 8 drives the second pump 64.

The gaseous refrigerant which is pressurized by the compressor 12 to a high temperature and a high pressure is sent to the heat exchanger 16 through the flow rate regulating valve 14 (port f). The refrigerant in the gaseous state at high temperature and high pressure is cooled by heat exchange with the heat in the second heat transfer path (60) in the heat exchanger (16), and is condensed into a liquid state. The refrigerant in the liquid state in the heat exchanger (16) is sent to the first expansion valve (18). The refrigerant in the liquid state, which is decompressed in the first expansion valve (18) and brought to a low temperature and a low pressure, is sent to the outdoor air heat exchanger (20). The low-temperature and low-pressure liquid refrigerant is heated by the outdoor air heat exchanger (20) by heat exchange with the outdoor air and evaporates to become a vapor state. The refrigerant in the gaseous state is returned to the compressor (12).

Further, the second pump 64 is driven to circulate the heat in the second heat transfer path 60. The high-temperature heat heated by the heat exchange with the high-temperature and high-pressure refrigerant in the heat exchanger 16 passes through the inside of the tank 62. The hot fruit is cooled by passing heat through the tank 62 while passing through the tank 62. As a result, the water in the tank 62 is heated by the heat of the fruit. The low-temperature heat after passing through the tank 62 is supplied to the heat exchanger 16 and is again heated by heat exchange with the refrigerant.

The hot water heating system 2 can heat the hot water in the tank 62 by circulating the refrigerant and the heat in the cycle as described above. When the temperature detected by the tank thermistor 63 reaches a predetermined heat storage termination temperature after the heat storage single operation is started, the control device 8 terminates the heat storage single operation.

(Heating single operation)

In the case where heating is instructed by the user and a request to store heat in the tank 62 is not generated, the hot water heating system 2 executes heating alone operation. At this time, the hot water heating system 2 determines whether or not the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts set by the remote controller, and the room temperature is lower than the set heating temperature Ts, And the heating operation is performed. Hereinafter, the contents of the two heating-only operations (the first heating-only operation and the second heating-only operation) will be described.

(First heating single operation; Fig. 3)

When the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts when the hot water heating system 2 performs heating alone operation, the hot water heating system 2 performs the first heating single operation do. When the room temperature is equal to or higher than the heating set temperature Ts, the required heating capability is lower than when the room temperature is lower than the set heating temperature Ts. 3, in the first heating alone operation, the control device 8 controls the flow rate regulating valve 14 such that a part of the refrigerant supplied to the port e is supplied to the port g, and the other part is opened (I.e., port e and port f, port e and port g communicate with each other). At this time, the control device 8 adjusts the opening degree of the flow regulating valve 14 so that the flow rate of the refrigerant supplied to the port f and the flow rate of the refrigerant supplied to the port g become substantially equal (i.e., f = g). The control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. [ At this time, the control device 8 sets the number of revolutions per unit time of the compressor 12 to a relatively small number of revolutions (R1). The control device 8 controls the switching valve 70 such that the heat in the first heat transfer path 50 is supplied to the heat exchanger 16 and does not pass through the bypass path 58 And the port i communicate with each other). Further, the control device 8 drives the first pump 54. At this time, the control device 8 sets the number of revolutions per unit time of the first pump 54 to a relatively large number of revolutions R3. In addition, in the first heating alone operation, the control device 8 does not drive the burner 52. [

A part of the gaseous refrigerant which is pressurized by the compressor 12 and has a high temperature and a high pressure is sent to the indoor air heat exchanger 26 through the flow rate regulating valve 14 (port g). The refrigerant in the gaseous state at high temperature and high pressure is cooled by heat exchange with room air in the indoor air heat exchanger 26, and is condensed to be in a liquid state. The refrigerant in the liquid state in the indoor air heat exchanger (26) is sent to the second expansion valve (30). The refrigerant in the liquid state, which is reduced in pressure by the second expansion valve (30) to a low temperature and a low pressure, joins with the low-temperature low-pressure liquid refrigerant sent from the first expansion valve (18) and sent to the outdoor air heat exchanger (20). The low-temperature, low-pressure liquid refrigerant is heated by the heat exchange with the outdoor air in the outdoor air heat exchanger (20), evaporates, and becomes a vapor state. The refrigerant in the gaseous state is returned to the compressor (12).

On the other hand, another part of the gaseous refrigerant which is pressurized by the compressor 12 and has a high temperature and a high pressure is sent to the heat exchanger 16 through the flow regulating valve 14 (port f). The refrigerant in the gaseous state at high temperature and high pressure is cooled by heat exchange with the heat in the heat exchanger 16 and condensed to be in a liquid state. The refrigerant in the liquid state in the heat exchanger (16) is sent to the first expansion valve (18). The refrigerant in the liquid state, which is reduced in pressure by the first expansion valve (18) to a low temperature and a low pressure, merges with the low-temperature low-pressure liquid refrigerant sent from the second expansion valve (30) and sent to the outdoor air heat exchanger (20). Since the flow of the refrigerant thereafter is as described above, the detailed description is omitted.

Further, the first pump 54 is driven to circulate the fruit in the first fruit circulation path (50). The high-temperature heat heated by heat exchange with the high-temperature high-pressure refrigerant in the heat exchanger 16 is sent to the heating terminal 56 via the switching valve 70. The high-temperature fruit is cooled by radiating heat from the heating terminal 56 to the room. The low-temperature heat after passing through the heating terminal 56 is supplied to the heat exchanger 16 through the first pump 54 and is heated again by heat exchange with the refrigerant.

In the first heating alone operation, the hot water heating system 2 circulates the refrigerant and the heat in the cycle as described above, thereby radiating indoor air to both the room air heat exchanger 26 and the heating terminal 56 to heat the room have.

(Second heating single operation: Fig. 4)

When the room temperature detected by the room temperature thermistor 42 is lower than the heating set temperature Ts when the hot water heating system 2 performs heating alone operation, the hot water heating system 2 performs the second heating alone operation . When the room temperature is lower than the set temperature Ts, the required heating capability is higher than when the room temperature is equal to or higher than the set temperature Ts. 4, the controller 8 adjusts the flow rate regulating valve 14 and the switching valve 70 to the same opening degree as in the case of the first heating single operation even in the second heating single operation. The control device 8 also drives the first fan 22, the second fan 28 and the first pump 54 (the number of revolutions R3) under the same conditions as in the case of the first heating alone operation. In the second heating alone operation, the controller 8 sets the number of revolutions per unit time of the compressor 12 to the number of revolutions (R2) larger than the number of revolutions R1 and drives the compressor 12 . Further, in the second heating alone operation, the control device 8 drives the burner 52.

The circulation cycle of the refrigerant and the heat in the second heating single operation is basically the same as the circulation cycle of the refrigerant and the heat in the first heating single operation. However, in the second heating alone operation, the burner 52 is driven so that the high-temperature heat heated by the heat exchange with the high-temperature and high-pressure refrigerant in the heat exchanger 16 is the heat of combustion of the fuel in the burner 52 Which is further heated by the heat to become a higher-temperature fruit. That is, in the second heating alone operation, the high-temperature heat heated in both the heat exchanger 16 and the burner 52 is supplied to the heating terminal 56. Since the number of revolutions per unit time R2 of the compressor 12 is larger than the number of revolutions per unit time R1 of the compressor 12 during the first heating operation alone, The temperature of the refrigerant in the first heating operation is higher than that in the first heating operation alone. As a result, the heating capacity by the indoor air heat exchanger 26 and the heating terminal 56 is higher than during the first heating alone operation.

(Simultaneous heating and heating operation)

When the heating is instructed by the user and a request to store heat into the tank 62 is issued, the hot water heating system 2 executes the operation of heat accumulation heating simultaneously. At this time, the hot water heating system 2 determines whether or not the indoor temperature detected by the indoor temperature thermistor 42 is equal to or higher than the heating set temperature Ts set by the remote control, and whether the indoor temperature is lower than the heating set temperature Ts, And simultaneously performs the regenerative heating operation. Hereinafter, the contents of the two simultaneous heat and heat heating simultaneous operation (simultaneous first heat accumulation heating operation and second accumulator heating simultaneous operation) will be described.

(Simultaneous operation of first heat accumulation heating; FIG. 5)

When the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts in the case where the hot water heating system 2 performs simultaneous thermal and heating operation, the hot water heating system 2 performs the simultaneous heating / . When the room temperature is equal to or higher than the heating set temperature Ts, the heat storage ability and the heating ability required are lower than when the room temperature is lower than the heating set temperature Ts. 5, the control device 8 controls the flow rate regulating valve 14 such that a part of the refrigerant supplied to the port e is supplied to the port g and the other part is supplied to the port f (That is, port e and port f, port e and port g communicate with each other). At this time, the control device 8 adjusts the opening degree of the flow regulating valve 14 so that the flow rate of the refrigerant supplied to the port f becomes larger than the flow rate of the refrigerant supplied to the port g (i.e., f> g). The control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. [ At this time, the controller 8 sets the number of revolutions per unit time of the compressor 12 to the number of revolutions (R2) greater than the number of revolutions R1. The control device 8 controls the switching valve 70 such that the heat in the first heat transfer path 50 is supplied to the heat exchanger 16 and the heat exchanger 16 does not pass through the bypass path 58 h and port i communicate with each other). Further, the control device 8 drives the first pump 54 and the second pump 64. At this time, the control device 8 sets the number of revolutions per unit time of the first pump 54 to the number of revolutions R4 that is smaller than the number of revolutions R3. The number of revolutions per unit time of the second pump 64 is set to a predetermined value. Further, in the first simultaneous heat accumulation heating operation, the control device 8 does not drive the burner 52.

Since the movement of the refrigerant by the compressor 12 is the same as that in the first and second heating single operation (see Figs. 3 and 4), detailed description thereof will be omitted. Since the number of revolutions per unit time (R2) of the compressor (12) is larger than the number of revolutions (R1) in the first heating operation even in the first simultaneous heat accumulation heating operation, The temperature of the high-pressure refrigerant becomes higher than that in the first heating alone operation. In the first simultaneous heating / heating operation, the opening degree of the flow regulating valve 14 is adjusted so that the flow rate of the refrigerant supplied to the port f becomes larger than the flow rate of the refrigerant supplied to the port g (f> g). As a result, more and more high-temperature and high-pressure refrigerant is supplied to the heat exchanger 16. As a result, in the heat exchanger 16, the high-temperature, high-pressure refrigerant can perform more heat exchange with the heat in the second heat transfer path 60.

The operation of the first pump 54 is similar to that of the first and second heating operations (see FIGS. 3 and 4), and therefore detailed description thereof will be omitted. However, in the first simultaneous heat accumulation heating operation, the number of revolutions per unit time R4 of the first pump 54 is less than the case of the first and second heating alone (the number of revolutions R3). Therefore, in the heat exchanger 16, the amount of heat per unit time applied to the heat in the first heat transfer path 50 from the refrigerant is smaller than that in the first and second heating alone operations. As a result, in the heat exchanger 16, much heat is applied from the refrigerant to the heat in the second heat transfer path 60.

Since the movement of the fruit by the driving of the second pump 64 is the same as that in the case of the heat storage single operation (Fig. 2), detailed description is omitted.

In the first simultaneous heat accumulation and heating operation, the hot water heating system 2 circulates the refrigerant and the heat in the cycle as described above, thereby radiating heat to indoor air from both the indoor air heat exchanger 26 and the heating terminal 56, And the hot water can be stored in the tank 62. Further, When the temperature detected by the tank thermistor 63 reaches a predetermined heat storage termination temperature after the first regenerative heating simultaneous operation is started, the control device 8 terminates the first heat accumulation heating simultaneous operation. At this point, when the heating operation instruction is continuously executed (when the end of heating is not instructed by the user), the control device 8 continues the first heat accumulation heating operation Heating alone operation is executed.

(Second simultaneous heating and heating operation; FIG. 6)

When the room temperature detected by the room temperature thermistor 42 is lower than the heating set temperature Ts in the case where the hot water heating system 2 performs the simultaneous thermal storage and heating operation, Run the operation. When the room temperature is lower than the heating set temperature Ts, the required heat storage ability and heating ability are higher than when the room temperature is equal to or higher than the heating set temperature Ts. 6, the opening degree of the flow rate regulating valve 14 is adjusted so that the flow rate of the refrigerant supplied to the port f becomes larger than the flow rate of the refrigerant supplied to the port g in the second simultaneous heat accumulation heating operation (that is, f > g). The control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. [ The controller 8 sets the number of revolutions per unit time of the compressor 12 to the number of revolutions R2 that is larger than the number of revolutions R1 in the second simultaneous heat accumulation heating operation. The control device 8 controls the switching valve 70 to switch the state in which the heat in the first heat transfer path 50 is not supplied to the heat exchanger 16 through the bypass path 58 And the port j communicate with each other). Further, the control device 8 drives the first pump 54 and the second pump 64. The control device 8 sets the number of revolutions per unit time of the first pump 54 to the number of revolutions R3 that is larger than the number of revolutions R4 during the first regenerative heating operation. The number of revolutions per unit time of the second pump 64 is set to a predetermined value. In addition, in the second simultaneous heating / heating operation, the control device 8 drives the burner 52.

The movement of the refrigerant by the drive of the compressor 12 is the same as that in the first simultaneous heat accumulation and heating operation (see Fig. 5), and thus the detailed description is omitted. Further, since the number of revolutions per unit time (R2) of the compressor (12) is larger than the number of revolutions (R1) in the first heating operation alone even in the second simultaneous heat accumulation heating operation, The temperature of the refrigerant in the first heating operation is higher than that in the first heating operation. The opening degree of the flow rate regulating valve 14 is adjusted so that the flow rate of the refrigerant supplied to the port f becomes larger than the flow rate of the refrigerant supplied to the port g during the second simultaneous heat accumulation heating operation (f> g). As a result, more and more high-temperature and high-pressure refrigerant is supplied to the heat exchanger 16. As a result, in the heat exchanger 16, the high-temperature and high-pressure refrigerant can perform more heat exchange between the heat in the first heat transfer path 50 and the heat in the second heat transfer path 60.

The first pump 54 is driven so that the heat in the first heat transfer path 50 is not supplied to the heat exchanger 16 but flows through the bypass path 58 to the burner 52 and the heating terminal 56 ). ≪ / RTI > However, in the second simultaneous heat accumulation heating operation, the burner 52 is driven so that the heat of the circulating heat in the path is sufficiently heated by the heat of combustion of the fuel in the burner 52, and the high temperature heat is produced. In the second simultaneous heat accumulation heating operation, high temperature heat heated by the burner (52) is supplied to the heating terminal (56). The heat of combustion of the burner 52 is higher than that of the refrigerant passing through the heat exchanger 16 (that is, the heating amount per unit time is large). As a result, the heating performance by the heating terminal 56 is higher than during the simultaneous operation of the first heat accumulation and heating.

Since the movement of the fruit by the driving of the second pump 64 is the same as that in the case of the heat storage single operation (Fig. 2), detailed description is omitted. However, in the second heat accumulation heating operation, since the heat in the first heat transfer path (50) is not supplied to the heat exchange unit (16), the heat of the refrigerant in the heat transfer heat exchanger (16) And the like. As a result, the heat storage ability is higher than that at the time of simultaneous operation of the first thermal storage and heating.

In the second simultaneous heat accumulation and heating operation, the hot water heating system 2 circulates the refrigerant and the heat in the cycle as described above, thereby radiating heat to the indoor air from both the indoor air heat exchanger 26 and the heating terminal 56, And the hot water can be stored in the tank 62. Further, When the temperature detected by the tank thermistor 63 reaches a predetermined heat storage termination temperature after the start of the second heat accumulation heating simultaneous operation, the control device 8 terminates the second heat accumulation heating simultaneous operation. At this time, when the heating operation instruction is continuously executed (when the end of heating is not instructed by the user), the control device 8 continues to the second heating Performs single operation.

(Heat storage heating control process; Fig. 7)

Whether or not each of the heating alone operation and the simultaneous heat and heat heating operation described with reference to Figs. 3 to 6 when the heating is instructed by the user is executed is determined by the heat accumulation heating control processing (Fig. 7 ). Hereinafter, the contents of the heat accumulation heating control process executed by the control device 8 will be described.

When the heating is instructed by the user, the control device 8 starts the accumulative heating control process of Fig. When the regenerative heating control process is started, the control device 8 determines whether or not the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts.

If the room temperature is equal to or higher than the heating set temperature Ts, the control device 8 determines YES in S10 and proceeds to S12. In the present embodiment, the case of YES in S10 is a case where the room temperature has reached the heating set temperature required by the user and a high heating capacity is not required. On the other hand, if the room temperature is lower than the heating set temperature Ts, the control device 8 determines NO at S10 and proceeds to S22. In the present embodiment, the case of NO in S10 is a case where the room temperature does not reach the heating set temperature required by the user and a high heating capacity is required.

In S12, the control device 8 determines whether the temperature of the water in the tank 62 detected by the tank thermistor 63 (hereinafter sometimes referred to as tank temperature) is lower than a predetermined heat accumulation start temperature.

If the tank temperature is lower than the heat accumulation start temperature at the time point S12, the control device 8 determines YES in S12 and proceeds to S16. The case of YES in S12 is a case where a heat storage request to the tank 62 is generated. In this case, at S16, the control device 8 executes the first heat accumulation heating simultaneous operation (see Fig. 5). In the case where the simultaneous first heat accumulation heating simultaneous operation is executed at the time of S16, the first accumulative heating simultaneous operation is continued. The details of the first heat accumulation heating simultaneous operation are as described above with reference to FIG. 5, and therefore, detailed description thereof will be omitted. When the first regenerative heating simultaneous operation is started in S16, the control device 8 returns to S10.

When the tank temperature is equal to or higher than the heat accumulation start temperature at the time point S12, the control device 8 determines NO in S12 and proceeds to S14. In S14, the controller 8 determines whether or not the tank temperature is equal to or higher than a predetermined heat storage termination temperature.

If the tank temperature is lower than the heat storage termination temperature at the time of S14, the control device 8 determines NO in S14 and proceeds to S16. The case of NO in S14 means that the tank temperature has not reached the heat storage termination temperature at the time of S14 (i.e., the boiling is not completed). In this case, the control device 8 executes the first heat accumulation heating simultaneous operation (see Fig. 5) in S16. In the case where the simultaneous first heat accumulation heating simultaneous operation is executed at the time of S16, the first accumulative heating simultaneous operation is continued. Thereafter, the control device 8 returns to S10.

On the other hand, when the tank temperature is equal to or higher than the heat accumulation start temperature at the time of S14 (i.e., the boiling has already been completed and the heat storage request has not occurred), the control device 8 determines YES in S14 and proceeds to S18 do. In S18, the control device 8 executes the first heating single operation (see Fig. 3). When the first heating single operation is already executed at the time of S18, the first heating single operation is continued. Since the contents of the first heating single operation are as described above with reference to Fig. 3, detailed description thereof will be omitted. When the first heating single operation is started in S18, the control device 8 returns to S10.

In S22, the control device 8 performs the same determination as that in S12. If YES in S22, the control device 8 proceeds to S26 and executes the second heat accumulation heating simultaneous operation (see Fig. 6). If the second regenerative heating simultaneous operation is already executed at the time of S26, the second regenerative heating simultaneous operation is continued. The details of the second heat accumulation and heating operation are as described above with reference to FIG. 6, and a detailed description thereof will be omitted. When the second accumulator heating simultaneous operation is started in S26, the control device 8 returns to S10.

On the other hand, if NO in S22, the process proceeds to S24, and the control device 8 performs the same determination as that of S14. If NO in S24, the control device 8 proceeds to S26 to execute the second heat accumulation heating simultaneous operation (see Fig. 6). When the control device 8 starts the second accumulator heating simultaneous operation in S26, the control device 8 returns to S10. On the other hand, if YES in S24, the control device 8 proceeds to S28 to execute the second heating single operation. When the control unit 8 starts the second heating single operation in S28, the control unit 8 returns to S10.

The control device 8 repeatedly executes the above-described regenerative heating control process (S10 to S28) until a stop of heating is instructed from the user. When the stop of the heating is instructed from the user, the control device 8 ends the heat accumulation heating control process.

The configuration and operation of the hot water heating system 2 of the present embodiment have been described above. 7, when the room temperature detected by the room temperature thermistor 42 is lower than the heating set temperature Ts (NO in step S10 of Fig. 7), the hot water heating system 2 of this embodiment, , YES in S22), the second simultaneous heating and heating operation (see Fig. 6) is executed. When the second heat accumulation heating simultaneous operation must be executed, the required heating capability is higher than when the first heat accumulation heating simultaneous operation must be executed (YES in S10 and YES in S12). The hot water heating system 2 of this embodiment can heat the heat of the heat supplied to the heating terminal 56 by the combustion heat of the burner 52 by executing the second heat accumulation heating simultaneous operation in this case, The heat for heating the water in the heat exchanger 16 can be supplied by the heat applied from the refrigerant. Generally, the heating capability (that is, the heating amount per unit time) of the burner 52 for burning the fuel is higher than the heating ability by heat exchange with the refrigerant in the heat exchanger 16. [ Therefore, it is easy to secure a sufficient heat storage ability and a heating capacity in comparison with a situation in which the heat storage ability and the heating ability must be procured only by the capacity of the compressor (12). Therefore, in the hot water heating system 2 of the present embodiment, when the heat storage heating operation is to be executed, it is possible to suppress the occurrence of situations in which the required heat storage ability and heating capacity are insufficient when the required heating capacity is high .

In the above embodiment, the number of revolutions per unit time R4 of the first pump 54 when performing the first regenerative heating simultaneous operation (see Fig. 5) is executed in the second regenerative heating simultaneous operation (see Fig. 6) Is smaller than the number of revolutions per unit time R3 of the first pump 54 in the case (R4 < R3). Accordingly, when performing the first heat accumulation heating simultaneous operation in which the high heating ability is not required, a lot of heat is applied from the refrigerant to the heat in the second heat transfer path (60) in the heat exchanger (16). As a result, the heat storage in the tank 62 can be properly performed.

7, when the room temperature detected by the room temperature thermistor 42 is lower than the heating set temperature Ts (step S10 in Fig. 7), the hot water heating system 2 of the present embodiment, NO, NO in S22, and YES in S24), the second heating single operation (see FIG. 4) is executed. When the second heating alone operation must be executed, the required heating capability is higher than when the first heating alone operation must be executed (YES in S10, NO in S12, and YES in S14). In the hot water heating system 2 of this embodiment, by performing the second heating alone operation in this case, the heat of the heat supplied to the heating terminal 56 is transferred to the heat of the burner 52 and the heat of the heat exchanger 16 And can be supplied by both of the heat applied from the refrigerant. In other words, it is easy to secure a sufficient heating capacity as compared with a case in which the heating capacity must be procured only by the heat applied from the refrigerant. Therefore, in the hot water heating system 2 of the present embodiment, when heating alone operation is to be executed, it is possible to suppress occurrence of a situation in which the required heating capacity is insufficient when the required heating capacity is high.

The hot water heating system 2 of the present embodiment can perform heating (air heating) by the indoor air heat exchanger 26 in addition to heating (floor heating) by the heating terminal 56 during heating operation (See Figs. 3 to 6). According to the hot water heating system 2 of the present embodiment, by using floor heating and air heating in combination, the interior can be heated more comfortably.

In the hot water heating system 2 of this embodiment, when the simultaneous operation of regenerative heating and heating is performed, the flow regulating valve 14 is opened so that the flow rate of the refrigerant supplied to the port f becomes larger than the flow rate of the refrigerant supplied to the port g (I.e., f > g, see Figs. 5 and 6). Accordingly, in the hot water heating system 2 of the present embodiment, when the simultaneous heat storage and heating operation is carried out, the high-temperature and high-pressure refrigerant compressed by the compressor 12 can be supplied by the heat exchanger 16 in a large amount. The heat of the refrigerant can be supplied by the tank 62 more than in the case of performing heating alone operation. Therefore, according to this configuration, when the simultaneous operation of heat storage and heating is performed, the indoor space can be appropriately heated while appropriately increasing the amount of heat in the tank 62. [

Here, the correspondence between the description of the embodiments and the description of the claims will be described. The hot water heating system 2 is an example of the &quot; heat pump system &quot;. The heat pump air conditioner 4 is an example of a &quot; heat pump &quot;. The heat exchanger 16 is an example of the "first heat exchanger" and the "second heat exchanger". The first expansion valve (18) and the second expansion valve (30) are examples of &quot; pressure reducing mechanism &quot;. The outdoor air heat exchanger 20 is an example of an &quot; evaporator &quot;. The heating terminal 56 is an example of a &quot; heating terminal &quot;. The first fruit circulation path (50) and the fruits circulating inside the first fruit circulation path (50) are examples of "heating circulation path" and "first fruit", respectively. The second fruit circulation path 60 and the fruits circulating inside the second fruit circulation path 60 are examples of "tank circulation path" and "second fruit", respectively. The burner 52 is an example of a &quot; heat source unit &quot;. The switching valve 70 is an example of &quot; switching means &quot;. The hot water supply pipe 66 is an example of the "supply means". The flow rate adjusting valve 14 is an example of &quot; adjusting means &quot;. YES in S10 of Fig. 7 and YES in S12 is an example of the &quot; first case &quot;, and the first heat accumulation heating simultaneous operation (Fig. 5) is an example of the &quot; first operation &quot;. NO in S10 of Fig. 7 and YES in S22 is an example of the &quot; second case &quot;, and the second simultaneous heating and heating simultaneous operation (Fig. 6) is an example of the &quot; second operation &quot;. YES in S10 of Fig. 7, NO in S12 and YES in S14 are examples of the &quot; third case &quot;, and the first heating single operation (Fig. 3) is an example of the &quot; third operation &quot;. NO in S10 of Fig. 7, NO in S22 and YES in S24 are examples of the &quot; fourth case &quot;, and the second heating single operation (Fig. 4) is an example of the &quot; fourth operation &quot;.

Although the embodiments have been described in detail above, they are merely illustrative and do not limit the claims. The techniques described in the claims include various modifications and changes to the specific examples described above.

(Modified Example 1)

In the above embodiment, the second heat transfer path (60) of the water heater (7) circulates the heat in the tank (62) and the heat exchanger (16). The present invention is not limited to this and the second heat transfer path 60 may directly draw out the water in the tank 62 and send it out to the heat exchanger 16 to perform heat exchange with the refrigerant in the heat exchanger 16 The hot water heated by the heat exchange with the refrigerant may be returned to the tank 62. [

(Modified example 2)

In the above embodiment, the heat exchanger 16 performs heat exchange between the heat passing through the first heat transfer path 50 and the refrigerant passing through the heat transfer path 32, and the second heat transfer path 60) and the refrigerant passing through the refrigerant circulation path (32). A heat exchanger for exchanging heat between the refrigerant passing through the first refrigerant circulation path 50 and the refrigerant passing through the refrigerant circulation path 32 and the second refrigerant passing through the second heat transfer path 60, And a heat exchanger for exchanging heat between the refrigerant passing through the refrigerant circulation path (32) may be provided separately.

The technical elements described in this specification or the drawings are intended to exhibit technical usefulness alone or in various combinations and are not limited to combinations of claims described in the application. The technology described in the present specification or drawings can achieve a plurality of objectives at the same time, and achieving one of the objectives itself has technological usefulness.

2: Hot water heating system 4: Heat pump air conditioner
6: Floor heating device 7: Water heater
8: Control device 12: Compressor
14: Flow regulating valve 16: Fruit heat exchanger
18: first expansion valve 20: outdoor air heat exchanger
22: first fan 26: indoor air heat exchanger
28: second fan 30: second expansion valve
32: Refrigerant circulation pathway 40: Outside temperature thermistor
42: room temperature thermistor 50:
52: burner 54: first pump
56: Heating terminal 58: Bypass
60: Second Fruit circulation path 62: Tank
63: tank thermistor 64: second pump
66: hot water supply pipe 68: water introduction pipe
70: Switching valve

Claims (4)

A first heat exchanger for condensing the refrigerant by heat exchange between the first heat and the second heat, a second heat exchanger for condensing the refrigerant by heat exchange between the second heat and the refrigerant, a decompression mechanism for decompressing the refrigerant, A heat pump having an evaporator for evaporating the refrigerant,
A heating terminal for heating the room using the heat of the first fruit;
A heating circulation path for circulating the first fruit between the first heat exchanger and the heating terminal,
A first pump for circulating the first fruit in the heating circulation path,
A heat source for heating the first fruit circulating in the heating circulation path,
A bypass path connecting the upstream side and the downstream side of the first heat exchanger and bypassing the first heat exchanger,
Switching means for switching between a state in which the first fruit in the heating circulation path flows through the bypass path and a state in which the first fruit in the heating circulation path does not flow in the bypass path,
A tank for accumulating heat,
A supply means for supplying the hot water to the hot water utilization site using the heat accumulated in the tank,
A tank circulation path for circulating a second fruit between the second heat exchanger and the tank,
A second pump for circulating a second fruit in the tank circulation path,
A control device,
The control device includes:
In the case where the heat storage operation for storing heat in the tank by operating the heat pump and the operation of the second pump and the heating operation for heating the room by the heating terminal by operating the first pump are simultaneously executed,
In the first case in which the indoor temperature is not lower than the specific limit value, the switching means performs the first operation in which the first heat in the heating circulation path does not flow through the bypass path and the heat source is not operated,
And the second operation in which the switching means is operated in a state in which the first fruit in the heating circulation path flows through the bypass path and the heat source is operated in the second case in which the indoor temperature is lower than the specific limit value.
The method according to claim 1,
The control device includes:
Wherein the number of revolutions per unit time of the first pump when the first operation is executed is made smaller than the number of revolutions per unit time of the first pump when the second operation is executed.
The method according to claim 1 or 2,
The control device includes:
In the case where the heating operation is not performed but the heating pump is operated and the first pump is operated to heat the room by the heating terminal alone,
In the third case in which the indoor temperature is higher than or equal to a certain threshold value, the switching means is operated in a state in which the first heat in the heating circuit does not flow through the bypass furnace,
And a fourth operation in which the switching means is operated in a state in which the first heat in the heating circuit does not flow through the bypass furnace to operate the heat source when the temperature of the room is lower than a certain limit value, .
The method of claim 3,
The heat pump,
An indoor air heat exchanger for condensing the refrigerant by heat exchange with indoor air,
Further comprising adjusting means capable of adjusting the ratio of the flow rate of the refrigerant supplied to the indoor air heat exchanger and the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger,
The control device includes:
The ratio of the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger in the case where the heat accumulation operation and the heating operation are simultaneously performed as in the first case and the second case is the same as the third and fourth cases, Wherein the control means operates the adjusting means so that the ratio of the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger when the refrigerant is solely performed is greater than the ratio of the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger.

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