JP4619322B2 - Heat pump water heater - Google Patents

Description

  The present invention relates to a heat pump water heater that heats and supplies hot water by heat exchange with a refrigerant circulating in a heat pump cycle, and in particular, an air conditioning function that performs indoor air conditioning by heat exchange between the refrigerant and room air, The present invention relates to a heat pump type hot water heater provided with a humidifying function for blowing high-humidity air into the room.

Conventionally, there is an air conditioner that can humidify a room in order to prevent indoor drying (humidity reduction) during heating operation. For example, there is an air conditioner in which moisture in the air is absorbed by an adsorbent such as zeolite, and humidified by heating the adsorbent as necessary. However, there is a problem that the humidification ability is limited by the moisture absorbed by the adsorbent, and a high humidification ability cannot be obtained when the moisture in the air is small.
On the other hand, in Patent Document 1, hot water heated to a high temperature by a water heater is supplied to an indoor air heat exchanger that performs heat exchange between indoor air and a refrigerant, thereby evaporating the hot water. It has been proposed to humidify. In this case, since sufficient moisture is supplied for humidification, high humidification ability can be obtained.
JP-A-9-26152

However, the configuration of the invention of Patent Document 1 requires a configuration for supplying hot water from the water heater to the indoor air heat exchanger, such as a pipe through which the hot water circulates and a transport pump for transporting the hot water. , There is a problem that the apparatus size is increased and a cost is increased. In particular, in a configuration in which water is supplied to the vicinity of the indoor air heat exchanger accommodated in an indoor unit provided in the room, a space for water to flow through the indoor unit is required. Will expand.
Accordingly, the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat pump type water heater capable of simplifying a configuration for using hot water of a water heater for humidification. It is in.

To achieve the above object, the present invention provides a water heat exchanger that exchanges heat between a refrigerant and water, an outdoor air heat exchanger that exchanges heat between the refrigerant and outdoor air, and the refrigerant. And an indoor air heat exchanger that performs a heat exchanger between the indoor air and the room air, and supply hot water after being heated by heat exchange with the refrigerant in the water heat exchanger A hot water storage unit that is applied to a heat pump type hot water heater and stores hot water after being heated by heat exchange with the refrigerant in the water heat exchanger, and hot water stored in the hot water storage unit A humidifying tank having an air reservoir for storing air in contact with the air, a wind guide path for guiding the air passing through the air reservoir of the humidifying tank to the vicinity of the indoor air heat exchanger, and the guide The indoor air heat exchanger for air through the wind path Configured as a heat pump water heater, characterized by comprising and a blowing means such as a blower fan for blowing in the vicinity.
In the heat pump type water heater configured as described above, the interior of the room is humidified by humid air supplied from the humidification tank to the vicinity of the indoor air heat exchanger, and therefore, the vicinity of the indoor air heat exchanger. The configuration can be simplified compared to the conventional device that supplies water up to the maximum, and the expansion of the device size can be suppressed. For example, high strength is not required for the air guide path that guides air instead of water.

  Furthermore, in order to simplify the configuration of the heat pump type hot water heater, it is desirable that the blowing means also serves as a function of blowing outdoor air to the outdoor air heat exchanger. That is, if the blower fan for outdoor air heat exchanger provided in a conventional general air conditioner is used as the blower means, it is not necessary to newly provide the blower means, and the present invention is realized with a simple configuration. can do. In this case, the air blowing means acts to supply air to the air guide path.

  Moreover, it is desirable that the air blowing means also has a function of blowing room air to the room air heat exchanger. That is, if the blower fan for indoor air heat exchanger provided in a conventional general air conditioner is used as the blower means, it is not necessary to newly provide the blower means, and the present invention is realized with a simple configuration. can do. In this case, the air blowing means acts to suck out air from the air guide path.

By the way, the hot water stored in the hot water storage section of the humidification tank naturally evaporates, and thus the humidity of the air stored in the air storage section increases. In order to further increase the humidity of the air, the humidification tank It is desirable to further provide atomization means for atomizing the water in the hot water storage section of the tank with ultrasonic waves. Thereby, the humidity of the air supplied to the vicinity of the indoor air heat exchanger via the air storage section can be sufficiently increased, and a high humidification capacity can be obtained.
Further, a configuration in which condensing superheating means for heating a part of the water in the hot water storage part of the humidifying tank by condensing can be considered. In this configuration, the humidity in the air reservoir can be sufficiently increased by heating the water in the hot water reservoir. In addition, since the entire water in the humidifying tank is not heated, only a part of the water is heated by condensing, so that the power consumption can be minimized.

According to the present invention, the interior of the room is humidified by humid air supplied from the humidification tank to the vicinity of the indoor air heat exchanger, so that the water is supplied to the vicinity of the indoor air heat exchanger. Thus, the configuration can be simplified and the increase in the size of the apparatus can be suppressed. For example, high strength is not required for the air guide path that guides air instead of water.
Further, by providing an atomizing means for atomizing the water in the storage section of the humidifying tank with ultrasonic waves, the water is supplied to the vicinity of the indoor air heat exchanger via the air storage section. The humidity of the air can be sufficiently increased, and a high humidification capacity can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings so that the present invention can be understood. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.
FIG. 1 is a schematic configuration diagram of a heat pump type hot water heater X according to the embodiment of the present invention.
As shown in FIG. 1, the heat pump water heater X includes a heat pump cycle 1 in which CO ₂ refrigerant is circulated (hereinafter referred to as “CO ₂ cycle 1”) and a heat pump cycle 2 in which R410A refrigerant is circulated (hereinafter referred to as “CO ₂ cycle 1”). "R410A cycle 2"), flowing water paths 30a-30d, hot water storage tank 31, circulation pump 34, water heat exchanger 32 common to the heat pump cycles 1 and 2, and outdoor air heat exchangers 13, 23 And a switching valve 41 to 45, a humidifying switching valve 46, and a humidifying device 50. The heat pump water heater X includes a CPU, a RAM, a ROM, and the like, and includes a control unit (not shown) that controls the heat pump water heater X in an integrated manner.

The water heat exchanger 32 includes a coolant circulating in the CO ₂ cycle 1 and the R410A cycle 2, water flowing on the flowing water path 30 b from the water supply port to the hot water supply port, or the flowing water path 30 a returning to the hot water storage tank 31. Heat exchange. Here, the flowing water path 30a is a flowing water path in which the hot water storage tank 31, the circulation pump 34, the switching valve 45, the water heat exchanger 32, the switching valve 43, and the hot water storage tank 31 are sequentially connected from the water supply port. . The flowing water path 30b is a flowing water path in which the switching valve 45, the water heat exchanger 32, the switching valve 43, the humidifying switching valve 46, and the hot water supply port are connected in order from the water supply port. The flowing water path 30c is a flow path of warm water from the hot water storage tank 31 through the switching valve 44 and the humidifying switching valve 46 to the hot water supply port, and the flow path 30d is the switching valve 44 from the water supply port. , A water flow path following the humidification switching valve 46 to the hot water supply port.

The outdoor air heat exchanger 13 performs heat exchange between the CO ₂ refrigerant circulated in the CO ₂ cycle 1 and outdoor air, and the outdoor air heat exchanger 23 is the R410A cycle 2 Heat exchange is performed between the R410A refrigerant circulated in the air and outdoor air. The outdoor air heat exchanger 13 and the outdoor air heat exchanger 23 are accommodated together with the hot water storage tank 31 and the humidifying device 50 in an outdoor unit (not shown) disposed outside the room.
In addition, outdoor blower fans 13a and 23a for blowing outdoor air to the outdoor air heat exchangers 13 and 23 are provided inside the outdoor unit (not shown). The outdoor fan 13a, 23a may be a common fan.

Hot water heated by heat exchange with the refrigerant in the water heat exchanger 32 is stored in an upper layer of the hot water storage tank 31, and water supplied from a water supply port is stored in a lower layer of the hot water storage tank 31.
In the heat pump type hot water heater X, each component is controlled by the control unit (not shown), so that water supplied from a water supply port flows on the water flow path 30a, and then the water heat exchanger Hot water storage operation that is heated by 32 and stored in the hot water storage tank 31 or water supplied from a water supply port is made to flow on the water flow path 30b and then heated by the water heat exchanger 32 to directly supply hot water from the hot water supply port. Instant hot water operation is performed.

For example, in the instantaneous hot water supply operation, the switching valves 43 and 45 are controlled by the control unit, so that water supplied from the water supply port circulates in the direction of the broken arrow along the water flow path 30b. . Thereby, the water supplied from the water supply port is heated by heat exchange with the refrigerant in the water heat exchanger 32 and then supplied from the hot water supply port.
However, a sufficient amount of heating by the water heat exchanger 32 cannot be obtained for a certain time after the instantaneous hot water supply operation is started. Therefore, for a certain period of time after the start of the instantaneous operation, the hot water stored in the hot water storage tank 31 is mixed with the water supplied from the water supply port through the flowing water path 30d through the flowing water path 30c and the switching valve 44. After the temperature is adjusted, the hot water supply port is supplied. Thereby, hot water can be instantaneously supplied from the hot water supply port.
Then, when it becomes possible to sufficiently heat the water supplied from the water supply port by the water heat exchanger 32, the water supply to the hot water storage tank 31 is stopped, and thereafter, the water heat is supplied from the water supply port. Instantaneous hot water supply is performed using a flowing water path 30b that passes through the exchanger 32 and continues to the hot water supply port. In addition, it is also possible to supply hot water as it is, without mixing the hot water stored in the hot water storage tank 31 with the water supplied from the water supply port.
On the other hand, in the hot water storage operation, when the circulation pump 34 is driven, water flows in the direction of the solid arrow along the flowing water path 30a, so that the hot water heated by the water heat exchanger 32 is It is stored in the hot water storage tank 31.

Next, the CO ₂ cycle 1 and the R410A cycle 2 will be described.
The CO ₂ cycle 1 has a circulation path 10 in which a compressor 11, the water heat exchanger 32, an expander 12, and the outdoor air heat exchanger 13 are connected in order.
In the circulation path 10, the compressor 11 is driven by the control unit (not shown), whereby CO ₂ refrigerant, which is an example of carbon dioxide refrigerant, is circulated in the direction of the arrow shown in the figure. Here, the CO ₂ refrigerant has characteristics different from those of the R410A refrigerant circulated in the R410A cycle 2, and can heat water to a high temperature (about 90 ° C.) as a characteristic of the refrigerant. Low. Therefore, the CO ₂ cycle 1 is mainly used for heating water in the hot water storage operation.
Specifically, the high-temperature and high-pressure CO ₂ refrigerant compressed and discharged by the compressor 11 is cooled by heat exchange with water flowing on the flowing water path 30a or 30b in the water heat exchanger 32. Thereafter, the expander 12 expands. Thereafter, the low-temperature and low-pressure CO ₂ refrigerant expanded in the expander 12 is heat-exchanged with the outdoor air in the outdoor air heat exchanger 13 to absorb heat and vaporize, and then flows into the compressor 11 again.
In the CO ₂ cycle 1, the CO ₂ refrigerant is circulated through the circulation path 10 as described above, so that water flowing in the direction of the arrow on the flowing water path 30 a or 30 b is transferred to the water heat exchanger 32. It is heated to about 90 ° C. by heat exchange with the CO ₂ refrigerant. In addition, since the flow direction of the CO ₂ refrigerant and water in the water heat exchanger 32 is opposite, heat exchange between the CO ₂ refrigerant and water is performed efficiently.
The hot water heated by the water heat exchanger 32 is controlled by the control unit (not shown) by the switching valve 43 or the humidifying switching valve 46, so that the hot water storage tank 31 and the hot water supply are heated. It is supplied to either the mouth or the humidifier 50.

On the other hand, the R410A cycle 2 has a circulation path 20 and a circulation path 40 through which R410A refrigerant, which is an example of an HFC refrigerant, is circulated. Here, the R410A refrigerant, the CO ₂ has a refrigerant different properties, but can only heat the water compared to the CO ₂ refrigerant to a low temperature (about 65 ° C.), since the energy consumption efficiency (COP) is high , Suitable for relatively low boiling temperature. Therefore, the R410A cycle 2 is mainly used for heating water in the instantaneous hot water supply operation. Other examples of the R410A refrigerant include R407C / E, R404A, R507A, and R134a. Further, the refrigerant used in the heat pump type hot water heater X is not limited to the carbon dioxide refrigerant and the HFC refrigerant, and two refrigerants having different characteristics such as heat exchange efficiency and energy consumption efficiency may be used.

In the circulation path 20, a compressor 21, a four-way valve 24, a switching valve 41, the water heat exchanger 32, a switching valve 42, an expander 22, the outdoor air heat exchanger 13 and the four-way valve 24 are sequentially connected. It is configured.
In the circulation path 20, the R410A refrigerant is circulated in the direction of the solid arrow shown in FIG. 1 by being driven by the compressor 21 under the control of the control unit (not shown). Specifically, the high-temperature and high-pressure R410A refrigerant compressed and discharged by the compressor 21 reaches the water heat exchanger 32 through the four-way valve 24 and the switching valve 41. The R410A refrigerant is cooled by heat exchange with water flowing on the flowing water path 30a or 30b in the water heat exchanger 32. Thereafter, the R410A refrigerant expands in the expander 22 via the switching valve 42. Then, the low-temperature and low-pressure R410A refrigerant expanded in the expander 22 is heat-exchanged with the outdoor air in the outdoor air heat exchanger 13 to absorb heat and vaporize, and then passes through the four-way valve 24 to the compressor 21 again. Inflow.
In the R410A cycle 2, as described above, the R410A refrigerant is circulated in the direction of the solid arrow in the circulation path 20, so that the water flowing in the direction of the arrow on the flowing water path 30a or 30b is transferred to the water heat exchanger 32. Is heated to about 65 ° C. by heat exchange with the R410A refrigerant. Since the flow direction of the R410A refrigerant and water in the water heat exchanger 32 is opposite, heat exchange between the R410A refrigerant and water is performed efficiently.
The hot water heated by the water heat exchanger 32 is controlled by the control unit (not shown) by the switching valve 43 or the humidifying switching valve 46, so that the hot water storage tank 31 and the hot water supply are heated. It is supplied to either the mouth or the humidifier 50.

On the other hand, the circulation path 40 includes the compressor 21, the four-way valve 24, the switching valve 41, the indoor air heat exchanger 4, the switching valve 42, the expander 22, the outdoor air heat exchanger 13, and the four-way. Valves 24 are connected in order.
Here, the indoor air heat exchanger 4 is accommodated in an indoor unit (not shown) of an air conditioner that cools and heats the room between the R410A refrigerant circulated in the circulation path 40 and room air. The room air is heated or cooled by performing heat exchange. That is, when the R410A refrigerant having a high temperature or a low temperature flows into the indoor air heat exchanger 4, an indoor heating operation or a cooling operation is realized. An indoor blower fan 4a for blowing indoor air to the indoor air heat exchanger 4 is provided inside the indoor unit (not shown).

Here, the heating operation and the cooling operation realized in the R410A cycle 2 of the heat pump type hot water heater X will be described.
(1) Heating operation When the user requests the heat pump water heater X to start a heating operation from an operation unit (not shown), in the heat pump water heater X, the control unit (not shown) The compressor 21 and the four-way valve 24 are controlled, and the circulation of the R410A refrigerant in the direction of the solid arrow in the circulation path 40 of the R410A cycle 2 is started. At this time, the illustrated solid line path is established inside the four-way valve 24.
As a result, the R410A refrigerant is circulated in the circulation path 40 in the direction of the solid arrow shown in the figure. Specifically, the high-temperature and high-pressure R410A refrigerant compressed and discharged by the compressor 21 reaches the indoor air heat exchanger 4 through the four-way valve 24 and the switching valve 41. The R410A refrigerant is cooled by heat exchange with indoor air in the indoor air heat exchanger 4. Thereafter, the R410A refrigerant expands in the expander 22 via the switching valve 42. The low-temperature and low-pressure R410A refrigerant expanded in the expander 22 is heat-exchanged with the outdoor air in the outdoor air heat exchanger 13 to absorb heat and vaporize, and then passes again through the four-way valve 24 to the compressor 21 again. Inflow.
In the R410A cycle 2, the R410A refrigerant is circulated in the direction of the solid arrow in the circulation path 40 as described above, whereby the indoor air is exchanged with the R410A refrigerant in the indoor air heat exchanger 4. Heated. That is, heating is realized by the heat pump type hot water heater X.

(2) Cooling operation On the other hand, when the user requests the heat pump water heater X to start the cooling operation from an operation unit (not shown), the heat pump water heater X has the control unit (not shown). ), The compressor 21 and the four-way valve 24 are controlled, and the circulation of the R410A refrigerant in the direction of the broken line arrow is started in the circulation path 40 of the R410A cycle 2. At this time, the illustrated broken line path is established inside the four-way valve 24.
Thereby, in the circulation path 40, the R410A refrigerant is circulated in the direction of the broken arrow shown in the figure. Specifically, the high-temperature and high-pressure R410A refrigerant compressed and discharged by the compressor 21 reaches the outdoor air heat exchanger 13 through the four-way valve 24. The R410A refrigerant is cooled by exchanging heat with outdoor air in the outdoor air heat exchanger 13. Thereafter, the R410A refrigerant expands in the expander 22. The low-temperature and low-pressure R410A refrigerant expanded in the expander 22 is subjected to heat exchange with the indoor air in the indoor air heat exchanger 4 via the switching valve 42, and absorbs and vaporizes. It flows into the compressor 21 again through the four-way valve 24.
Thus, in the R410A cycle 2, the R410A refrigerant is circulated in the direction of the broken line arrow in the circulation path 40 as described above, so that the indoor air is separated from the R410A refrigerant in the indoor air heat exchanger 4 with the R410A refrigerant. It is cooled by heat exchange. That is, cooling is realized by the heat pump type hot water heater X. At this time, in the heat pump type hot water heater X, the switching valves 41 and 42 are controlled by the control unit (not shown), thereby preventing the circulation of the R410A refrigerant in the circulation path 20. Therefore, even if the cooling operation is being executed by the R410A cycle 2, the hot water supply operation by the CO ₂ cycle 1 can be executed.

Hereinafter, the humidifier 50 will be described in detail.
As shown in FIG. 1, the humidifier 50 includes a humidifying tank 51 for storing hot water after being heated in the water heat exchanger 32, the inside of the humidifying tank 51, and the indoor air heat exchanger. A humidifying air pipe 52 (an example of a wind guide path) communicating with the indoor unit (not shown) of the air conditioner provided with 4 and the inside of the humidifying tank 51 via the humidifying air path 52 A humidifying fan 53 (an example of a blowing unit) for blowing air into the indoor unit (not shown), and a damper provided on the air flow path from the humidifying fan 53 into the humidifying tank 51 54 and a damper 55 provided on the air flow path from the humidifying tank 51 to the vicinity of the indoor air heat exchanger 4 of the indoor unit (not shown). As described above, the humidifier 50 is housed in the outdoor unit (not shown) together with the outdoor air heat exchangers 13 and 23, the outdoor blower fans 13a and 23a, the hot water storage tank 31, and the like.

The humidifying tank 51 includes a warm water reservoir 51a for storing warm water after being heated in the water heat exchanger 32, and an air reservoir 51b for storing air in contact with the warm water stored in the warm water reservoir 51a. have. The humidifying tank 51 is provided with a drain port (drain port) for discharging the warm water stored in the warm water storage part 51a to the outside.
One end of the humidifying blower pipe 52 is connected to the damper 55 and the other end is opened in the vicinity of the indoor air heat exchanger 4. The humidified blower pipe 52 is blown by the humidifying blower fan 53 and is humidified. The air that has passed through the air storage part 51 b of the industrial tank 51 is guided to the vicinity of the indoor air heat exchanger 4.
The damper 54 is opened by the pressure of the air flowing from the humidifying blower fan 53 into the humidifying tank 51, and the damper 55 is opened by the pressure of the air flowing from the humidifying tank 51 to the humidifying blower pipe 52. Open.

In the heat pump type water heater X, in response to a request for starting a humidifying operation from an operation unit (not shown), a humidifying operation is performed in which the humidifying device 50 is humidified by being controlled by the control unit (not shown). Is done. Further, the humidification operation may be automatically executed in order to maintain a preset humidity.
Hereinafter, the humidification operation performed by the control unit (not shown) in the heat pump type hot water heater X will be described.
First, in the humidification operation, the switching valve 43 is configured so that hot water heated by the water heat exchanger 32 by heat exchange with the CO ₂ refrigerant and the R410A refrigerant is supplied to the humidification tank 51. Further, the humidifying switching valve 46 is switched by the control unit (not shown), and warm water is supplied to the warm water storing unit 51a of the humidifying tank 51 and stored. At this time, the hot water supplied to the humidifying tank 51 is supplied from the water supply port by operating the CO ₂ cycle 1 or the R410A cycle 2 as in the hot water storage operation or the instantaneous hot water supply operation, for example. Hot water supplied directly through the water heat exchanger 32 or hot water supplied from the hot water storage tank 31. When a predetermined amount of hot water is stored in the humidifying tank 51, the supply of the hot water is stopped.

Next, when the humidification blower fan 53 starts to be driven by the control unit (not shown), the humidification device 50 blows air from the humidification blower fan 53 toward the humidification tank 51. . The humidifying fan 53 is rotationally driven by a motor (not shown).
When air is blown from the humidifying blower fan 53 toward the humidifying tank 51, the damper 54 is opened by the pressure of the air, and the air blown from the humidifying blower fan 53 is sent to the humidifying tank 51. Flows in.
When the air flows into the humidifying tank 51, the damper 55 is opened by the pressure of the air, so that the air flowing in from the damper 54 flows through the air storage part 51b to the humidified air. It flows into the pipe 52. At this time, the air that has flowed into the humidifying blast pipe 52 contains steam obtained by evaporating the hot water stored in the humidifying tank 51, and has increased humidity. It should be noted that the dampers 54 and 55 may be electric dampers whose opening and closing are controlled by the control unit (not shown) or the like. In this case, the dampers 54 and 55 are controlled to be opened by the control unit (not shown) at the start of the humidification operation.

  Thereafter, the high-humidity air that has flowed into the humidifying air blow pipe 52 flows into the indoor air heat exchanger 4 provided in the indoor unit (not shown) via the humidifying air blow pipe 52 and enters the room. Be blown. As described above, in the heat pump type hot water heater X, humidification of the room can be achieved by blowing high-humidity air into the room by the humidifier 50. Therefore, since it is not necessary to supply water to the indoor unit as in the prior art, the configuration of the heat pump type hot water heater X can be simplified. Moreover, since it is not necessary to supply water to the interior of the indoor unit (not shown), it is possible to suppress an increase in the size of the indoor unit (not shown).

By the way, the said humidification ventilation fan 53 may be the structure which serves as the said outdoor ventilation fans 13a and 23a provided in the said outdoor unit (not shown). That is, the blower fans 13a and 23a provided in a conventional outdoor unit (not shown) can be used as the humidifying blower fan 53 of the humidifying device 50. In this case, since it is not necessary to newly add the humidifying fan 53, it is possible to reduce the size and cost of the apparatus.
Further, in order to efficiently increase the humidity of the air stored in the air storage part 51b, atomization means (not shown) for atomizing the water in the hot water storage part 51a of the humidifying tank 51 with ultrasonic waves. ) Is desirable. Thereby, the humidity of the air supplied to the vicinity of the said indoor air heat exchanger 4 via the said air storage part 51b can fully be raised, and high humidification capability can be acquired.
Furthermore, the structure which further provides the condensing superheating means to heat a part of water in the said warm water storage part 51a of the said humidification tank 51 by condensing can be considered. In this configuration, the humidity in the air reservoir 51b can be sufficiently increased by heating the water in the hot water reservoir 51a. In addition, since the entire water in the humidifying tank 51 is not heated but only a part of the water is heated by condensing, power consumption can be minimized.

Although the said embodiment demonstrated the example in which the said humidification ventilation fan 53 was provided in the said humidification apparatus 50 accommodated in the said outdoor unit (not shown), the said humidification ventilation fan 53 is set to the said indoor unit ( It is also conceivable as another embodiment to provide in (not shown).
Specifically, when the humidifying blower fan 53 is driven to rotate, the humidifying blower fan 53 is controlled so that an air suction force acts in a direction from the outside of the humidifying tank 51 toward the humidifying blower pipe 52. What is necessary is just to arrange | position in the said indoor unit (not shown).
Thus, when the humidifying fan 53 is driven to rotate, the air suction force acts in the direction from the outside of the humidifying tank 51 toward the humidifying fan pipe 52, so that the dampers 54 and 55 are opened. Therefore, the air outside the humidifying tank 51 flows into the vicinity of the indoor air heat exchanger 4 via the air storage part 51b in the humidifying tank 51 and then blown into the room.
At this time, the humidifying blower fan 53 may also serve as an air blower indoor fan 4a provided in the indoor unit (not shown). That is, the indoor air blowing fan 4 a for air conditioning provided in a conventional indoor unit (not shown) can be used as the humidifying air blowing fan 53. In this case, since it is not necessary to newly add the humidifying fan 53, it is possible to reduce the size and cost of the apparatus.

Further, when the temperature of the hot water stored in the humidifying tank 51 is lowered and natural evaporation is difficult to occur, the humidifying capacity is reduced. Therefore, the hot water stored in the hot water storage unit 51a is stored in the humidifying tank 51. It is conceivable to provide a temperature detection sensor for detecting the temperature.
When the temperature detected by the temperature detection sensor becomes a predetermined temperature or lower during the humidification operation, the hot water in the hot water storage unit 51a is supplied to the humidification tank 51 on the condition. It is discharged by a drain outlet (not shown) provided and controlled by the control unit (not shown) so that high-temperature hot water is supplied again. Specifically, the humidifying tank 51 is directly supplied with hot water after being heated by the water heat exchanger 32 or is supplied with hot water stored in the hot water storage tank 31.
Thus, by maintaining the temperature of the hot water in the humidifying tank 51 higher than a predetermined temperature, it is possible to maintain a high humidifying capacity in the humidifying operation realized by the heat pump type hot water heater X.

The schematic block diagram of the heat pump type hot water heater which concerns on embodiment of this invention.

Explanation of symbols

1, 2 ... Heat pump cycle 4 ... Indoor air heat exchanger 4a ... Indoor blower fan (an example of blower means)
11, 21 ... Compressors 12, 22 ... Expanders 13, 23 ... Outdoor air heat exchangers 13a, 23a ... Outdoor fan (an example of a blowing means)
DESCRIPTION OF SYMBOLS 40 ... Circulation path | route 24 ... Four-way valve 30a-30d ... Flowing water path 31 ... Hot water storage tanks 41-45 ... Switching valve 46 ... Humidification switching valve 50 ... Humidifier 51 ... Humidification tank 51a ... Hot water storage part 51b ... Air storage part 52 ... Humidification ventilation pipe (air guide path)
53. Humidification blower fan (an example of blower means)
54, 55 ... damper

Claims (5)

A water heat exchanger for exchanging heat between the refrigerant and water, an outdoor air heat exchanger for exchanging heat between the refrigerant and outdoor air, and a heat exchanger between the refrigerant and indoor air. A heat pump water heater for supplying hot water after being heated by heat exchange with the refrigerant in the water heat exchanger, comprising a heat pump cycle having an indoor air heat exchanger to perform,
Humidification having a hot water storage part for storing hot water heated by heat exchange with the refrigerant in the water heat exchanger and an air storage part for storing air in contact with the hot water stored in the hot water storage part Tank, a wind guide path for guiding the air passing through the air storage part of the humidifying tank to the vicinity of the indoor air heat exchanger, and the indoor air heat exchanger through the wind guide path A heat pump type hot water heater, characterized by comprising air blowing means for blowing air in the vicinity.   The heat pump type hot water supply apparatus according to claim 1, wherein the air blowing means also has a function of blowing outdoor air to the outdoor air heat exchanger.   The heat pump type hot water heater according to claim 1, wherein the air blowing means also has a function for blowing indoor air to the indoor air heat exchanger.   The heat pump type hot water heater according to any one of claims 1 to 3, further comprising atomizing means for atomizing water in the hot water storage section of the humidifying tank with ultrasonic waves.   The heat pump type hot water heater according to any one of claims 1 to 4, further comprising condensing superheating means for heating a part of the water in the hot water storage section of the humidifying tank by condensing.

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