JP2003194347A - Multifunctional hot water system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize a multifunctional hot water feeding system enabling efficiency improvement in a hot water means by providing a flow control means for varying the flow to circulate through the primary side hot water circuit in response to radiation of the heater. <P>SOLUTION: The system has a primary side hot water circuit 30 for circulating hot water out of a hot water reservoir 12 through a heat exchanger 31, a secondary side hot water circuit 40 for circulating the secondary side fluid out of the exchanger 31 through a floor heater 50, and a heating controller 22 for controlling the flows of hot water circulating in the circuits 30, 40 and of the secondary side fluid. A first water temperature sensor 41 is provided for sensing the temperature T1 of the secondary side fluid to flow in the heater 50, and the controller 22 makes the flow in the circuit 30 vary in response to the temperature T1 sensed by the sensor 41. In this way, efficiency in the hot water feeding means is improved. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifunctional hot water supply apparatus having a heater for hot water supply as well as hot water supply using hot water in a hot water storage tank for storing hot water heated by hot water supply means. In particular, it relates to a flow rate control for circulating hot water in the hot water storage tank when the heater is operating.

[0002]

2. Description of the Related Art Conventionally, as a multifunctional water heater of this type,
For example, as shown in FIG. 8, hot water supply means 100 such as a water heater.
In a hot water supply apparatus having a hot water storage tank 110 that stores hot water heated by the hot water supply pipe 130, hot water stored in the hot water storage tank 110 is provided with a hot and cold water mixing valve 120.
The hot water of the hot water in the hot water storage tank 110 is used to heat the hot water in the hot water storage tank 110, and the heater 14 such as a floor heater or a bathroom heater is used.
There is one that is distributed to 0 for use in heating.

In this apparatus, the heating heat exchanger 150 for circulating the hot water in the hot water storage tank 110 to the primary side to exchange heat with the secondary side fluid and the hot water in the hot water storage tank 110 for the heating heat exchanger 1
A primary side hot water circuit 170 having a first circulation pump 160 that circulates 50, a heater 140 that circulates the secondary fluid and is used for heating, and a second circulation that circulates the secondary fluid to the heater 140. And a secondary side hot water circuit 190 having a pump 180.

The heater 14 of the secondary side hot water circuit 190
When 0 is operated, the first circulation pump 160 and the second circulation pump 180 are controlled to operate so that the heat quantity of the hot water in the hot water storage tank 110 is exchanged with the secondary side fluid by the heater 140. It is configured to dissipate heat.

Then, due to the heat dissipation of the heater 140,
The amount of heat of the hot water returning to the hot water storage tank 110 of the primary side hot water circuit 170 decreases. The hot water supply means 100 detects the decrease in the amount of heat and operates the hot water supply means 100 to control the hot water in the hot water storage tank 110 to maintain a predetermined hot water temperature.

[0006]

According to the multifunctional water heater having the above-mentioned structure, for example, the heater 1 of the secondary side hot water circuit 190 is provided.
When at least two or more 40 are provided, the first circulation pump 160 and the second circulation pump 180 are generally configured to operate at a flow rate that is acceptable for the number of installed heaters 140. is there.

However, when the number of heaters 140 operating or the amount of heat released from the heater 140 is small, the heat quantity of the secondary fluid circulating in the secondary side hot water circuit 190 is reduced. Therefore, even in the hot water on the heat supply side, the degree of decrease in the hot water returning to the hot water storage tank 110 that has passed through the heating heat exchanger 150 is small. By the way, the primary side hot water circuit 1
Since the flow rate of 70 is a flow rate that allows the number of heaters 140 to be installed, as described above, the flow rate is generally high, and relatively high temperature hot water with a slight decrease in water temperature is stored in the hot water storage tank 11
It is driven to return to 0.

As described above, the hot water storage tank 1 stores the relatively high temperature hot water.
For example, when the hot water supply means 100 is a heat pump type water heater, the hot water supply means for boiling water in the operation of the hot water supply means 110 for adjusting the temperature in accordance with the decrease in the water temperature in the hot water storage tank 110. There is a problem that the operation efficiency of the means 110 is repeatedly operated for a long time in a temperature zone where the operation efficiency is not preferable.

Therefore, the object of the present invention is made in view of the above point, and the hot water supply means is provided by providing the flow rate control means for varying the flow rate of circulating the primary side hot water circuit according to the heat radiation of the heater. It is to provide a multi-function hot water supply device capable of improving the efficiency of.

[0010]

In order to achieve the above object, the technical means described in claims 1 to 9 is adopted. That is, in the invention according to claim 1, a hot water storage tank (1) for storing hot water heated by the hot water supply means (11).
2) and a heating heat exchanger (31) for circulating the hot water in the hot water storage tank (12) to the primary side and exchanging heat with the secondary side fluid, and heating the hot water in the hot water storage tank (12). Heat exchanger (3
Primary side hot water circuit (30) that circulates to 1) and heaters (50, 60) that are used for heating by circulating a secondary side fluid.
And a secondary-side hot water circuit (40) for circulating the secondary-side fluid in the heating heat exchanger (31) to the heater (50, 60).
And the primary side hot water circuit (30) and the secondary side hot water circuit (4
0) is a multifunctional hot water supply device comprising: hot water circulated in 0) and a flow rate control means (22) for controlling the flow rate of the secondary fluid, wherein the water temperature of the secondary fluid to be circulated in the heater (50, 60) ( A first water temperature detection means (41) for detecting T1) is provided, and the flow rate control means (22) is a heater (50, 60).
When the engine is operated, the flow rate of hot water circulating in the primary-side hot water circuit (30) is varied according to the water temperature (T1) of the secondary-side fluid detected by the first water-temperature detecting means (41). The feature is that it is controlled as follows.

According to the invention described in claim 1, for example, 2
When a plurality of heaters (50, 60) of the secondary hot water circuit (40) are installed, when the number of heaters (50, 60) in operation or the amount of heat released by the heaters (50, 60) is small. Two
The amount of heat of the secondary fluid circulating in the secondary hot water circuit (40) is reduced. In such a case, the primary side hot water circuit (3
When the flow rate on the 0) side is large, the water temperature of the warm water that passes through the heating heat exchanger (31) and returns to the inside of the hot water storage tank (12) is a slightly lowered relatively high temperature hot water.

Therefore, in the present invention, the water temperature (T1) of the secondary fluid detected by the first water temperature detecting means (41).
By controlling the flow rate of the hot water circulating in the primary side hot water circuit (30) in accordance with the above, the number of operating heaters (50, 60), that is, the heaters (50,
When the heat radiation amount of 60) is small, for example, when the water temperature (T1) of the secondary side fluid is high, the flow rate circulating in the primary side hot water circuit (30) is reduced and returned to the hot water storage tank (12). The water temperature of hot water is lowered.

In a heat pump type water heater using, for example, a CO ₂ refrigerant as the hot water supply means (11), the operating efficiency is good when the water temperature of 40 to 60 ° C. is heated. In particular, the efficiency becomes poorer as the temperature rises above 60 ° C. Therefore, the operating efficiency can be improved by controlling the water temperature of the hot water returned to the hot water storage tank (12) to be lowered.

According to the second aspect of the invention, the hot water supply means (1
Hot water storage tank (12) for storing hot water heated by 1)
And a heating heat exchanger (31) for circulating the hot water in the hot water storage tank (12) to the primary side and exchanging heat with the secondary side fluid. Exchanger (31)
The secondary side in the heat exchanger (31) for heating has a primary side hot water circuit (30) circulated in the room and a heater (50, 60) for circulating the secondary side fluid for heating purposes. A secondary side hot water circuit (40) for circulating fluid to the heater (50, 60),
Primary-side hot water circuit (30) and secondary-side hot water circuit (40)
A multi-function water heater comprising: hot water circulated in the air and a flow rate control means (22) for controlling the flow rates of the secondary fluid,
A first water temperature detecting means (41) for detecting the water temperature (T1) of the secondary side fluid flowing through the heater (50, 60), and the water temperature of the secondary side fluid flowing through the heater (50, 60) ( T
Second water temperature detection means (44) for detecting 2) is provided, and the flow rate control means (22) is configured to operate the first water temperature detection means (41) and the first water temperature detection means (41) when the heaters (50, 60) are operated. Control is performed so that the flow rate of hot water circulating in the primary-side hot water circuit (30) is variable according to the water temperature (T1, T2) of each secondary-side fluid detected by the 2-water temperature detecting means (44). It is characterized by that.

According to the second aspect of the present invention, when a plurality of heaters (50, 60) for the secondary side hot water circuit (40) are installed, the heaters (50, 60) are The water temperature (T) of the secondary side fluid returned to the heating heat exchanger (31) in accordance with the number of operating units, that is, the heat radiation amount of the heaters (50, 60).
2) is different.

Therefore, according to the present invention, the primary side hot water is generated in accordance with the water temperature (T1, T2) of each secondary side fluid detected by the first water temperature detecting means (41) and the second water temperature detecting means (44). By controlling the flow rate of the hot water circulating in the circuit (30) so as to be variable, the water temperature (T1, T2) of each of the secondary side fluids can be used, for example, the secondary side of the heating heat exchanger (31). The amount of heat received by the hot water circuit (40) is obtained. When the amount of heat received is large, the primary side hot water circuit (3
The flow rate of warm water in 0) may be large, and the flow rate may be small when the amount of heat received is small.

Further, by accurately grasping the change in the amount of heat received by the secondary side hot water circuit (40), the hot water storage tank (12) is controlled so that the flow rate of hot water returning to the hot water storage tank (12) and the water temperature can be kept to the necessary minimum. Since the amount of heat of the hot water in () can be used, it is possible to improve the operation efficiency with higher accuracy than the first aspect with respect to the hot water supply means (11).

According to the invention of claim 3, the hot water supply means (1
Hot water storage tank (12) for storing hot water heated by 1)
And a heating heat exchanger (31) for circulating the hot water in the hot water storage tank (12) to the primary side and exchanging heat with the secondary side fluid. Exchanger (31)
The secondary side in the heat exchanger (31) for heating has a primary side hot water circuit (30) circulated in the room and a heater (50, 60) for circulating the secondary side fluid for heating purposes. A secondary side hot water circuit (40) for circulating fluid to the heater (50, 60),
Primary-side hot water circuit (30) and secondary-side hot water circuit (40)
A multi-function water heater comprising: hot water circulated in the air and a flow rate control means (22) for controlling the flow rates of the secondary fluid,
A first water temperature detecting means (41) for detecting the water temperature (T1) of the secondary fluid flowing through the heater (50, 60) and the flow rate of the secondary fluid flowing through the heater (50, 60). And a flow rate control means (45) for controlling the flow rate of the secondary side fluid detected by the first water temperature detection means (41) when the heater (50, 60) is operated. It is characterized in that the flow rate of the hot water circulating in the primary side hot water circuit (30) is controlled to be variable in accordance with the water temperature (T1) and the flow rate detected by the flow rate detecting means (45).

According to the third aspect of the present invention, as the heater (50, 60) used for heating, for example, a floor heater is a secondary side fluid that passes through the floor panel in the temperature control thereof. Is controlled to open and close. Therefore, the flow rate circulating in the secondary side hot water circuit (40) changes.

Therefore, in the present invention, the water temperature (T1) of the secondary fluid detected by the first water temperature detecting means (41).
And the water temperature (T1) of the secondary side fluid is controlled by controlling the flow rate of the hot water circulating in the primary side hot water circuit (30) according to the flow rate detected by the flow rate detecting means (45). And the amount of heat received by the secondary side hot water circuit (40) of the heating heat exchanger (31) described in claim 2 can be obtained from the flow rate circulating in the secondary side circuit (40).
Therefore, the same effect as that of claim 2 is achieved.

According to the fourth aspect of the present invention, the flow rate control means (22), when the water temperature (T1) of the secondary fluid detected by the first water temperature detection means (41) exceeds a predetermined temperature, The hot water circulating in the primary side hot water circuit (30) is controlled so as to be stopped.

According to the fourth aspect of the present invention, as a heater (50, 60) for heating purposes, for example, a floor heater or the like has an optimum inlet water temperature of the floor heater of about 60 ° C. There is. Therefore, in the present invention, the water temperature (T
1) exceeds a predetermined temperature, the primary side hot water circuit (3
By controlling so that the hot water circulating in 0) is stopped, for example, if the predetermined water temperature is 60 ° C., the heating feeling of floor heating in a comfortable temperature range that avoids the excessively high temperature range exceeding 60 ° C. Is obtained.

Further, by controlling the temperature of the water temperature (T1) of the secondary fluid so as to fall below a predetermined temperature, the hot water storage tank (1
2) Since hot water returning to the inside can be suppressed, the operation efficiency of the hot water supply means (11) can be improved.

In the invention of claim 5, the primary side hot water circuit (30) is provided with a circulation pump (32) for circulating the hot water in the hot water storage tank (12), and the flow rate control means (22).
Is characterized by controlling the rotation speed of the circulation pump (32) to be variable. According to the invention described in claim 5, as the circulation pump (32), for example, a DC brushless motor, the voltage applied to the motor is controlled, and the rotation speed of the circulation pump (32) is controlled to be variable. This makes it possible to change the flow rate of the warm water returned to the hot water storage tank (12).

According to the sixth aspect of the invention, the primary side hot water circuit (30) is provided with a flow rate adjusting valve (34) for adjusting the flow rate of the hot water in the hot water storage tank (12), and the flow rate controlling means ( Two
2) is characterized in that the flow rate of the flow rate control valve (34) is controlled to be variable.

According to the sixth aspect of the invention, the circulation pump described in the fifth aspect is provided by providing the flow rate control valve (34) and controlling the flow rate of the flow rate control valve (34) to be variable. The flow rate control valve (3
It can be changed by 4).

According to the seventh aspect of the invention, the flow rate control means (22) causes the hot water in the hot water tank (12) to have a predetermined flow rate for a predetermined time when the heater (50, 60) is operated. It is characterized by controlling to circulate in.

According to the seventh aspect of the present invention, when the amount of heat received in the secondary side circuit (40) is obtained, for example, at the start of operation, when the amount of heat received is larger, circulation is performed at a predetermined flow rate. By controlling to the heater (5
(0, 60) improves the rising characteristics.

In the invention described in claim 8, the heater (5
0, 60) is provided with a second water temperature detection means (44) for detecting the water temperature (T2) of the secondary side fluid, and the secondary water temperature detection means (44) detects the secondary temperature for a predetermined time. It is characterized in that it ends when the water temperature (T2) of the side fluid exceeds a predetermined temperature.

According to the invention described in claim 8, as described above, by detecting the water temperature (T2) of the secondary side fluid,
The amount of heat received in the secondary circuit (40) is obtained. Therefore,
Since the water temperature (T2) rises when the amount of heat received decreases, the predetermined time is ended when the temperature reaches the predetermined temperature, so that the rising characteristics of the heater (50, 60) can be improved when the amount of heat received is large. .

In the invention described in claim 9, the predetermined flow rate is
It is characterized in that the heat exchange efficiency of the heating heat exchanger (31) is the maximum flow rate.

According to the ninth aspect of the invention, for example, the heat exchange efficiency characteristic of the heating heat exchanger (31) is set in advance and the heat exchange efficiency according to the amount of heat received in the secondary side circuit (40). By controlling the high flow rate of the heater (50, 6
It is possible to improve the rising characteristics of (0) and improve the operating efficiency of the hot water supply means (11).

The reference numerals in parentheses attached to the above-mentioned respective means show the corresponding relationship with the concrete means described in the embodiments to be described later.

[0034]

BEST MODE FOR CARRYING OUT THE INVENTION (First Embodiment) A multi-function water heater according to the first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 1 is a schematic diagram showing a schematic configuration of a multifunctional water heater.

As shown in FIG. 1, the multi-function water heater comprises a hot water storage type water heater 10, a primary side hot water circuit 20, a secondary side hot water circuit 30, a floor heater 40, a bathroom heater 50 and the like. There is.

The hot water storage type water heater 10 has a C
A heat pump hot water supply apparatus 11 for heating tap water to hot water (hereinafter referred to as hot water) at a high temperature (for example, 80 to 90 ° C.) by compressing a compressor (not shown) using O ₂ refrigerant, and this heat pump hot water supply apparatus 11 A hot water storage tank 12 for storing the hot water heated by the hot water supply system, a hot water supply pipe 13 for guiding the stored hot water to a hot water supply target, a hot water supply control device 20 for controlling the heat pump hot water supply device 11, and the like.

The hot water storage tank 12 is connected to an inlet pipe 14a which is connected to the heat pump type hot water supply device 11 at the upper side, and a discharge pipe 14b which is connected to the heat pump type hot water supply device 11 at the lower side.
It is connected to the. As a result, the hot water in the hot water storage tank 12 is discharged into the outlet pipe 14b, the heat pump hot water supply device 11, and the introduction pipe 1.
4a and the hot water storage tank 12 are sequentially circulated by a hot water supply pump (not shown) to store high-temperature hot water in the hot water storage tank 12.

An outlet 12a for discharging hot water stored therein is provided above the hot water storage tank 12 and connected to the upstream end of the hot water supply pipe 13, and an inlet 12b is provided below.
The upstream end is connected to tap water and is connected to a water supply pipe 15 for guiding the tap water to the hot water storage tank 12. As a result, when the stored hot water is supplied to the hot water supply target, tap water is supplied from the water supply pipe 15.

The hot water supply pipe 13 is a pipe for mixing hot water stored in the hot water storage tank 12 with tap water to obtain an appropriate temperature, and for guiding the hot water having an appropriate temperature to a hot water supply target such as a kitchen, a washroom, a bathroom and a bathtub. is there.

Further, the hot water supply pipe 13 is provided with a hot and cold water mixing valve 16 for mixing the stored hot water and tap water, one of which is connected to the water supply pipe 15 to which tap water is supplied.
b, and the other end is connected to the outlet 12b,
By adjusting the opening area ratio based on the temperature information of the temperature of the tap water and the temperature of the hot water, the mixing ratio of the hot water flowing out from the hot water tank 12 and the tap water led from the water supply pipe 15 is adjusted. The adjusted hot water is circulated through the hot water supply pipe 13.

The hot water supply controller 20 operates signals from the operation panel 21, detection signals from the sensors (not shown) provided in the heat pump hot water supply device 11 and the hot water tank 12, and the operation of the heater described later. A drive unit (not shown) provided in the heat pump hot water supply apparatus 11 is controlled by inputting a signal or the like to control the hot and cold water mixing valve 16 and the like.

The primary side hot water circuit 30 uses the hot water in the hot water storage tank 12 to supply the heat quantity of the hot water to the heaters 50 and 60 which will be described later, and the heat exchanger 31 for heating.
And hot water in the hot water storage tank 12 is circulated from the outlet 12a to the heat exchanger 31 for heating, so that the inlet 12 of the hot water storage tank 12 is
It is composed of a first circulation pump 32 that circulates so as to return to b and a circulating water passage 33 that connects these in a ring shape.

The heating heat exchanger 31 has a hot water storage tank 1 on the primary side.
It is a counter-flow water-water heat exchanger formed so that the hot water in 2 is circulated and the secondary fluid receives the heat quantity of the hot water of the primary side.

The first circulation pump 32 is a pump in which a motor portion (not shown) is formed by DC brushless, the number of rotations of which can be switched in a plurality of stages, and is controlled by the heating control device 22 which is a flow rate control means described later. .

The secondary side hot water circuit 40 includes the heat exchanger 3 for heating.
The heat quantity of the secondary fluid received from the plurality of heaters 50,
60 is a hot water circuit that is circulated in parallel with 60, the heating heat exchanger 31, and a first water temperature sensor 4 that is a first water temperature detecting means.
The first and second circulation pumps 42, the heaters 50 and 60, and the circulating water passage 43 are included.

The first water temperature sensor 41 is used for the heat exchanger 3 for heating.
It is installed on the outlet side of 1 and exchanges heat with the hot water on the primary side.
It is a sensor that detects the water temperature T1 of the secondary fluid.

The second circulation pump 42 is a pump which circulates the secondary side fluid from the heating heat exchanger 31 to the heaters 50 and 60 to circulate in the circulating water passage 43. In this second circulation pump 42, a flow rate for heating is set when the three heaters 50 and 60 are simultaneously used.

Here, the heaters 50 and 60 of the present embodiment.
50 is a floor heater and 60 is a bathroom heater. The floor heater 50 is a heater that warms the floor by circulating a secondary side fluid through a pipe 51 a in the floor panel 51.
1, a floor warm water temperature sensor 52 that detects the outlet water temperature of the floor panel 51, a thermal valve 53 that opens and closes the circulation of the secondary side fluid that flows through the pipe 51a, and a floor warming control device 23.

The floor heating control device 23 inputs the operation signal from the floor heating operation panel 24 and the detection signal from the floor warm water temperature sensor 52 to control the thermal valve 53. The floor heater 50 is installed on the floor of a washroom or a changing room, for example, and is used for heating.

The bathroom heater 60 blows warm air into the bathroom to heat it, and the radiator 61, the blower 62, and the suction temperature sensor 6 for detecting the temperature of the suction air.
3, the opening / closing valve 64 for opening and closing the circulation of the secondary side fluid flowing through the radiator 61, and the bathroom control device 25.

The bathroom control device 25 controls the blower 62 and the opening / closing valve 64 by inputting the operation signal from the operation panel 26 and the detection signal from the suction temperature sensor 63.

In the floor heating control device 23 and the bathroom control device 25, among the operation signals from the floor heating operation panel 24 and the operation panel 26, the operation signal is input to the heating control device 22 which is a flow rate control means described later. Is configured.

Here, the heating control device 22 which is the flow rate control means has a primary side hot water circuit 30 and a secondary side hot water circuit 30.
A control device for controlling the flow rates of the hot water and the secondary fluid that circulate in the inside, and receives the operation signals from the heaters 50 and 60 and the detection signal from the first water temperature sensor 41 to connect the first circulation pump 32 and The second circulation pump 42 is controlled. The operation signals from the heaters 50 and 60 are configured to be input from the heating control device 22 to the hot water supply control device 20.

Next, the operation of the multifunctional hot water supply device having the above-described structure will be described with reference to the control processing of the heating control device 22 which is the flow rate control means, with reference to FIGS. In FIG. 2, the heating control device 22 includes a first circulation pump 32 and a second circulation pump 42.
FIG. 3 is a flowchart for controlling the thermal valve 52 by the floor heating control device 23.

First, as shown in FIGS. 2 and 3, when an operation switch (not shown) in the floor heating operation panel 24 is turned on, the operation is started (steps 200 and 30).
0). Then, in step 210, it is determined whether or not the operation switch is ON, and in step 220, the thermal valve 52 is opened, and in one step 310, it is determined whether or not the operation signal of the heater 50 is ON. , The ON signal is input, the second circulation pump 42 is operated in step 320 and the first circulation pump 32 is operated in step 330.

As a result, the hot water in the hot water storage tank 12 circulates in the primary side hot water circuit 30 and the secondary side hot water circuit 4
The secondary fluid in 0 circulates in the floor panel 51. Then, the secondary fluid is received by the heat exchange of the heating heat exchanger 31 and radiated to the floor panel 51, whereby the floor panel 51 is heated.
Is warmed up.

Then, in the floor heater 50, the floor panel 5 detected by the floor warm water temperature sensor 52 in the next step 230.
It is determined whether the outlet water temperature T _{F of} 1 has reached the set temperature, and the secondary side fluid is circulated until it reaches the set temperature.

When the outlet water temperature T _F reaches the set temperature, the thermal valve 52 is closed in the next step 240. Then, in the next step 250, when the outlet water temperature T _F + α falls below the set temperature, the process returns to step 220 and the control for opening the thermal valve 52 is executed to control the temperature of the floor panel 51. When the operation switch is turned off, the operation switch is turned off in step 210 and the thermal valve 52 is closed in step 240.

By the way, the secondary fluid flowing in the floor panel 51 is heated by the heat exchanger 3 for heating according to the heat radiation amount of the floor panel.
It is configured to receive heat from No. 1 and to be circulated so as not to exceed the water temperature (for example, around 60 ° C.) in a temperature zone that is optimum for floor heating. That is, in step 330, the flow rate circulating in the primary side hot water circuit 30 is varied according to the outlet water temperature T1 of the heating heat exchanger 31 detected by the first water temperature sensor 41.

Incidentally, in the present embodiment, as shown in the characteristic b of FIG. 4 regarding the relationship between the water temperature T1 and the flow rate, the flow rate is decreased when the water temperature is high and the flow rate is changed according to the water temperature T1. The circulation pump 32 is controlled.

This is because the water temperature T1 is changed to a higher value especially when the heat radiation amount of the floor panel 51 is reduced. At such a time, the flow rate on the primary side hot water circuit 30 side is decreased, The temperature of the hot water returning to the hot water storage tank 12 is lowered. As a result, the temperature of the hot water returning to the inside of the hot water storage tank 12 can be lowered compared to the case where the flow rate of the characteristic B shown in FIG. 4 is constant.

Incidentally, when the flow rate is constant, in general, the heaters 50, 60 are generally set in order to increase the flow rate in order to set the flow rate tolerable even when a plurality of heaters 50, 60 are used at the same time. When the number of operating vehicles decreases, or when the heating load decreases and the amount of heat received by the secondary side hot water circuit 40 decreases, the water temperature of the hot water returning to the hot water tank 12 on the primary side hot water circuit 30 side decreases. Is small.

Therefore, hot water having a water temperature slightly lower than the hot water discharge temperature is introduced into the hot water storage tank 12 from the lower side to the upper side. When the heat pump type hot water supply device 11 controlled by the hot water supply control device 20 that sucks in and controls the temperature is operated, the operating temperature becomes poor because the water temperature on the suction side is high.

Therefore, in the present invention, the temperature of the hot water returned to the hot water storage tank 12 is lowered by varying the flow rate according to the water temperature T1.

In the present embodiment, the next step 34
In step 0 and step 360, the water temperature T1 is controlled so as not to exceed the water temperature in the temperature zone that is optimum for floor heating (for example, around 60 ° C.).

Specifically, in step 340, it is determined whether the water temperature T1 exceeds the first predetermined temperature (eg, 65 ° C.), and when it exceeds the first predetermined temperature (eg, 65 ° C.),
In step 350, the first circulation pump 32 is stopped to stop the circulation of hot water on the primary side hot water circuit 30 side. As a result, the temperature of the secondary fluid circulating in the secondary hot water circuit 40 does not exceed the first predetermined temperature (for example, 65 ° C.).

Then, when the water temperature T1 has dropped, it is judged in step 360 whether or not it has become equal to or lower than the second predetermined value (for example, 55 ° C.), and the second predetermined value (for example, 55 ° C.).
When it becomes the following, at step 330, the first circulation pump 32 is operated and is operated at a flow rate according to the water temperature T1. As a result, the water temperature T1 is controlled to fall within the range of the second predetermined value to the first predetermined value. The water temperature T1 within this range is set to an optimum temperature especially in floor heating because it does not become too hot.

The operation of the bathroom heater 60 is such that the opening / closing valve 64 and the blower 62 are controlled by the bathroom controller 25, which is controlled based on the flow chart shown in FIG. Briefly, it starts when an operation switch (not shown) in the operation panel 26 is turned on (step 2).
00). Then, in step 210, the operation switch is turned on.
It is determined whether or not the opening / closing valve 64 is opened in step 220a, and the blower 62 is operated in step 220b.

As a result, the secondary fluid is circulated through the radiator 61, the air in the bathroom is heated, and the bathroom is heated.
Then, in the next step 230a, the suction temperature sensor 63
The blower 62 is operated until it determines whether the suction temperature T _H detected thereby reaches the set temperature or not and reaches the set temperature.

When the suction temperature T _H reaches the set temperature, the blower 62 is stopped in the next step 240a. Then, in the next step 250a, the suction temperature T _H +
When α falls below the set temperature, the process returns to step 220b and the control for operating the blower 62 is executed to control the temperature in the bathroom. The operation switch is OF
When F is operated, the operation switch OF is turned off in step 210.
When the F operation is determined, the blower 62 is stopped at step 240a, and the opening / closing valve 64 is closed at step 240b.

According to the multi-function hot water supply device having the above-described structure, the flow rate of the hot water circulating in the primary side hot water circuit 30 is changed according to the water temperature T1 of the secondary side fluid detected by the first water temperature sensor 41. By controlling the first circulation pump 32 so as to be variable, when the number of operating heaters 50, 60 is small, that is, when the heat radiation amount of the heaters 50, 60 is small, the water temperature T1 of the secondary fluid is The higher the temperature is, the lower is the flow rate of the primary side hot water circuit, and the lower is the temperature of the hot water returned to the hot water storage tank 12.

As a result, for example, CO
_In the heat pump type hot water supply device 11 using _two refrigerants, the operation efficiency is good when the water temperature of 40 to 60 ° C. is heated. In particular, the efficiency becomes poorer as the temperature rises above 60 ° C. Therefore, by controlling the temperature of the hot water returning to the hot water storage tank 12 to be lowered, the operating efficiency of the heat pump hot water supply device 11 that sucks from below the hot water storage tank 12 and operates to control the temperature of the hot water in the hot water storage tank 12 Can be improved.

Further, when the floor heater 50 is used as the heater 50, when the water temperature T1 of the secondary side fluid exceeds a predetermined temperature (here, 65 ° C.), the inside of the primary side hot water circuit 30 By controlling so that the hot water circulating in the room is stopped, it is possible to obtain a heating feeling of floor heating in a comfortable temperature zone that avoids a temperature zone that is too hot exceeding 65 ° C.

(Second Embodiment) When a plurality of heaters 50, 60 of the secondary side hot water circuit 40 are installed, the heater 5
The water temperature of the secondary side fluid returning to the heating heat exchanger 31 varies depending on the number of operating units 0 and 60, that is, the amount of heat released from the heaters 50 and 60.

Therefore, in the present embodiment, as shown in FIG. 6, the heat exchanger 31 for heating is provided downstream of the second circulation pump 42.
The second water temperature sensor 44 which is the second water temperature detecting means for detecting the water temperature T2 of the secondary side fluid is provided. The detection signal detected by the second water temperature sensor 44 is input to the heating control device 22.

By providing the second water temperature sensor 44, the water temperature T1 on the outlet side of the heating heat exchanger 31 and the heating heat exchanger 31 are provided.
By detecting the water temperature T2 on the inlet side of, the amount of heat received by the secondary side hot water circuit 40 can be easily obtained.

Therefore, in the first embodiment, the flow rate having the characteristics shown in FIG. 4 is set, but the present invention is not limited to this, and the water temperature of the warm water to be returned to the hot water storage tank 12 is set in accordance with the heat receiving amount and the water temperature T1. The flow rate of the primary side circuit 30 may be controlled so as to be lower than the temperature of the water discharged from the hot water storage tank 12.

Particularly, when the amount of heat received is small, the water temperature of the warm water returned to the hot water storage tank 12 can be lowered by reducing the flow rate, and even when the amount of heat received is large, there is a predetermined temperature difference and the required minimum The flow rate may be increased to the limit.

As a result, for example, the heating heat exchanger 31
It is also possible to set the flow rate so that the heat exchange efficiency is high. In addition, the flow rate may be increased in accordance with the water temperature T1 during a predetermined time immediately after the start of operation of the heaters 50 and 60, which receives a large amount of heat. This improves the rising characteristics of the heaters 50 and 60.

Further, by accurately grasping the change in the amount of heat received by the secondary side hot water circuit 40, the heat quantity of the hot water in the hot water storage tank 12 is controlled so as to minimize the flow rate and the water temperature of the hot water returned to the hot water storage tank 12. Therefore, the heat quantity of the hot water in the hot water storage tank 12 can be effectively used.

When the heaters 50 and 60 are the floor heaters 50, the temperature control of the heaters 50 and 60 is controlled so as to open and close the secondary fluid passing through the floor panel 51. The flow rate circulating in the secondary side hot water circuit 40 changes. Therefore, as shown in FIG. 6, a flow rate detecting means 45 for detecting the flow rate circulating in the secondary side hot water circuit 40 may be provided. As a result, the amount of heat received by the secondary-side hot water circuit 40 can be obtained in the same manner as described above, and the same effect can be obtained.

(Other Embodiments) In the above embodiment, 1
The flow rate of circulation in the secondary hot water circuit 30 was controlled by the first circulation pump 32 having the DC brushless motor unit.
As shown in FIG. 7, a flow rate adjusting valve 34 for adjusting the flow rate may be provided in the primary side hot water circuit 30, and the flow rate adjusting valve 34 may be controlled by the heating control device 22. According to this, the first circulation pump 32 may be an induction motor.

The voltage applied to the motor section of the first circulation pump 32 may be controlled to be varied so that the rotation speed of the motor section can be varied.

In the above embodiment, the heater 60 is described as the bathroom heater 60, but it may be a bathroom dryer for drying the bathroom. In addition, bathroom dryer is bathroom heater 50
Unlike the above, introducing outside air can accelerate the drying in the bathroom.

Further, in the above embodiments, the heaters 50, 6
I configured three 0s, but no matter how many.

Further, in the above embodiment, the heat pump type hot water supply apparatus 11 using a CO ₂ refrigerant was described as the hot water supply means for heating the hot water, but the present invention is not limited to this, and a water heater using solar heat, gas or liquid fuel or It is applied to water heaters. Alternatively, tap water or the like may be introduced and heated in the hot water storage tank 12 by an electric heater or the like to be stored as hot water.

Further, in the above embodiment, each real value is an example and can be set appropriately.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a schematic configuration of a multifunctional water heater according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a control process of a heating control device 22 which is a flow rate control means in the first embodiment of the present invention.

FIG. 3 is a floor warming control device 2 according to the first embodiment of the present invention.
It is a flow chart which shows control processing of No. 3.

FIG. 4 is a characteristic diagram showing a relationship between a flow rate circulating in the primary side hot water circuit 30 and a water temperature T1 in the first embodiment of the present invention.

FIG. 5 is a bathroom control device 2 according to the first embodiment of the present invention.
6 is a flowchart showing a control process of No. 5.

FIG. 6 is a schematic diagram showing a schematic configuration of a multifunctional water heater according to a second embodiment of the present invention.

FIG. 7 is a schematic diagram showing a schematic configuration of a multifunctional water heater according to another embodiment.

FIG. 8 is a schematic diagram showing a schematic configuration of a multi-functional water heater according to a conventional technique.

[Explanation of symbols]

11 ... Heat pump type hot water supply device (hot water supply means) 12 ... Hot water storage tank 22 ... Heating control device (flow rate control means) 30 ... Primary side hot water circuit 31 ... Heat exchanger for heating 32 ... 1st circulation pump (circulation pump) 34 ... Flow control valve 40 ... Secondary side hot water circuit 41 ... First water temperature sensor (first water temperature detecting means) 44 ... Second water temperature sensor (second water temperature detecting means) 45 ... Flow rate detecting means 50 ... Floor heater (heater) 60 ... Bathroom heater (heater) T1 ... water temperature T2 ... water temperature

Claims (9)

[Claims] 1. A hot water storage tank (12) for storing hot water heated by a hot water supply means (11), and heating for circulating hot water in the hot water storage tank (12) to a primary side to exchange heat with a secondary side fluid. A heat exchanger (31) is provided, and hot water in the hot water storage tank (12) is heated by the heat exchanger (3) for heating.
In the heating heat exchanger (31), there are a primary side hot water circuit (30) circulating in 1) and a heater (50, 60) for circulating the secondary side fluid for heating purposes. A secondary side hot water circuit (40) for circulating the secondary side fluid to the heater (50, 60), and a primary side hot water circuit (30) and a secondary side hot water circuit (40). A multifunctional hot water supply device comprising: hot water and a flow rate control means (22) for controlling a flow rate of the secondary fluid, wherein the water temperature (T1) of the secondary fluid to be circulated in the heater (50, 60). A first water temperature detecting means (41) for detecting the temperature is provided, and the flow rate control means (22) is detected by the first water temperature detecting means (41) when the heater (50, 60) is operated. The primary side hot water circuit according to the water temperature (T1) of the discharged secondary side fluid. Multifunctional water heater and controls as hot water flow rate is variable circulating in 30). 2. A hot water storage tank (12) for storing hot water heated by a hot water supply means (11), and heating for circulating hot water in the hot water storage tank (12) to a primary side for heat exchange with a secondary side fluid. A heat exchanger (31) is provided, and hot water in the hot water storage tank (12) is heated by the heat exchanger (3) for heating.
In the heating heat exchanger (31), there are a primary side hot water circuit (30) circulating in 1) and a heater (50, 60) for circulating the secondary side fluid for heating purposes. A secondary side hot water circuit (40) for circulating the secondary side fluid to the heater (50, 60), and a primary side hot water circuit (30) and a secondary side hot water circuit (40). A multifunctional hot water supply device comprising: hot water and a flow rate control means (22) for controlling a flow rate of the secondary side fluid, wherein the water temperature (T1) of the secondary side fluid is passed through the heater (50, 60). First water temperature detecting means (41) for detecting water
And a second water temperature detecting means (4) for detecting the water temperature (T2) of the secondary fluid that has flowed through the heater (50, 60).
4) is provided, the flow rate control means (22), when operating the heater (50, 60), the first water temperature detection means (41) and the second water temperature detection means (4).
4) The primary side hot water circuit (30) according to the water temperature (T1, T2) of each of the secondary side fluids detected by
A multi-function water heater characterized by controlling the flow rate of hot water circulating in the inside. 3. A hot water storage tank (12) for storing hot water heated by a hot water supply means (11), and heating for circulating hot water in the hot water storage tank (12) to a primary side for heat exchange with a secondary side fluid. A heat exchanger (31) is provided, and hot water in the hot water storage tank (12) is heated by the heat exchanger (3) for heating.
In the heating heat exchanger (31), there are a primary side hot water circuit (30) circulating in 1) and a heater (50, 60) for circulating the secondary side fluid for heating purposes. A secondary side hot water circuit (40) for circulating the secondary side fluid to the heater (50, 60), and a primary side hot water circuit (30) and a secondary side hot water circuit (40). A multifunctional hot water supply device comprising: hot water and a flow rate control means (22) for controlling a flow rate of the secondary fluid, wherein the water temperature (T1) of the secondary fluid to be circulated in the heater (50, 60). First water temperature detecting means (41) for detecting water
And a flow rate detecting means (45) for detecting a flow rate of the secondary fluid flowing through the heater (50, 60), and the flow rate controlling means (45) includes the heater (50,
60) is operated, the first water temperature detecting means (4)
1) Water temperature of the secondary fluid detected by (1)
And a multi-function hot water supply device, wherein the flow rate of hot water circulating in the primary side hot water circuit (30) is controlled to be variable according to the flow rate detected by the flow rate detecting means (45). 4. The flow control means (22) comprises the first
When the water temperature (T1) of the secondary fluid detected by the water temperature detecting means (41) exceeds a predetermined temperature, the hot water circulating in the primary hot water circuit (30) is controlled to be stopped. Claim 1 thru | or Claim 3 characterized by the above-mentioned.
The multi-function water heater according to any one of 1. 5. A circulation pump (32) for circulating hot water in the hot water storage tank (12) in the primary side hot water circuit (30).
5. The multi-flow control device according to claim 1, wherein the flow rate control means (22) controls the rotation speed of the circulation pump (32) to be variable. Functional water heater. 6. The primary side hot water circuit (30) is provided with a flow rate control valve (34) for controlling the flow rate of hot water in the hot water tank (12), and the flow rate control means (22) is The multi-function water heater according to any one of claims 1 to 4, wherein the flow rate of the flow rate control valve (34) is controlled to be variable. 7. The flow rate control means (22) circulates the hot water in the hot water storage tank (12) at a predetermined flow rate for a predetermined time when the heater (50, 60) is operated. 7. The control according to claim 1, wherein
The multi-function water heater according to any one of 1. 8. A second water temperature detecting means (44) for detecting a water temperature (T2) of the secondary fluid flowing through the heater (50, 60) is provided, and the predetermined time is the second water temperature detecting means (44). The multi-function water heater according to claim 7, wherein when the water temperature (T2) of the secondary fluid detected by the water temperature detecting means (44) exceeds a predetermined temperature, the operation is ended. 9. The multi-function water heater according to claim 7, wherein the predetermined flow rate is a flow rate at which the heat exchange efficiency of the heating heat exchanger (31) is maximum.