JP3166359B2 - Heat utilization equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat utilization device such as a hot water supply device in a residential building central used for an apartment house or the like.

[0002]

2. Description of the Related Art FIG. 10 shows an example of a conventional hot water supply device for a residential building central.

FIG. 10 shows a heating medium which is circulated to each dwelling unit as a heat source and exchanges heat with the heating medium in each dwelling unit to obtain hot water. A heat medium outlet pipe 2 is piped toward each floor of the building and each dwelling unit, and a heat medium return pipe 3 connected at an end of the heat medium outlet pipe 2 is piped to form a heat medium residence building circulation path 4. And this heat medium residence building circulation path 4
Is provided with a heat medium circulation pump 5.

[0004] Reference numerals 6 and 6 'denote hot water supply units in each dwelling unit, which include a heat supply heat exchanger 7 and hot and cold water mixing taps 8, 8'.
One end of the primary flow path 7 a of the hot water supply heat exchanger 7 is connected to the heat medium outlet pipe 2, and the other end is connected to the heat medium return pipe 3.
In addition, the secondary flow path 7 having a heat exchange relationship with the primary flow path 7a.
One end of b is connected to a water supply pipe 9a, and the other end is connected to hot and cold water mixing taps 8, 8 'via a hot water supply pipe 10.

[0005] In the hot water supply apparatus of the above living building central, high-temperature hot water (70-85 ° C) is produced by the heating medium heater 1 and circulated by the heating medium circulating pump 5 to each dwelling unit of the whole living building. The heat exchange between the heat medium and the feed water is used for hot water supply. This type of hot water supply system is configured so that the high-temperature and high-pressure heat medium circulating through the entire living building (the higher the building floor of the living building is, the higher the pressure is) is not connected to the hot water outlet in each dwelling unit. It is especially effective in high-rise apartment buildings because it is safe at times.

However, when the hot water supply pipe 10 is long, it takes a long time to open the hot and cold water mixing taps 8 and 8 'and start to supply hot water from the hot water outlets 8a and 8a'. This is inconvenient and wastes such as discarding water that has stayed in the hot water supply pipe 10 during the stop of hot water supply and has been cooled by heat radiation.

FIG. 11 shows a conventional example of a hot water supply apparatus for obtaining quick hot water. FIG. 11 shows a hot water supply pipe 13 on the outlet side of a heat exchanger 12 heated by a combustion device 11.
4 ', and a return pipe 15, an electric motor driven circulation pump 16, a temperature detector 17, a fuel supply valve 18, and a control device 19.

When the temperature detector 17 detects a decrease in the temperature of the hot water in the hot water supply pipe 13, the hot water supply apparatus operates the circulating pump 16 driven by the electric motor via the control device 19 and heats the fuel by the combustion device 11. The temperature of the hot water is raised.

[0009]

However, in the above-described configuration in which the conventional combustion apparatus is provided in each door, there is a problem in terms of safety in a high-rise apartment house. In a configuration in which a conventional electric motor driven circulation pump is added to each dwelling unit, there is a problem that noise and electricity generated by the operation of the electric motor are added to increase the running cost, and in particular, each dwelling unit in each dwelling unit 6, The above-mentioned noise problem is large in an apartment house where many 6's are installed close to each other.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a heat utilization device having a quick hot water property and a low initial and running cost as a hot water supply device for a residential building central or the like.

[0011]

According to the present invention, in order to achieve the above object, a heat medium introduction passage communicating with a heat medium supply pipe, a heat exchange section and a heat medium outflow passage communicating with a heat medium return pipe are sequentially connected. A heating medium circulation path is provided, and a heating medium driving flow path in which a flow path switching unit provided in the heating medium introduction passage, a heating medium driving unit of a circulation pump using the heating medium as a driving source, and a flow distribution unit are sequentially connected. In parallel with the heat exchange unit, one end on the outlet side of the flow distribution unit is connected to the heat medium outflow passage, and the other end on the exit side of the flow distribution unit is connected between the flow switching unit and the heat exchange unit. Is connected to the heat medium introduction passage.

In addition, there is provided a flow distribution control device for controlling the flow rate of the heat medium flowing to the heat exchange section in the flow distribution section according to the temperature detected by the temperature detection section provided on the outlet side of the secondary flow path of the heat exchange section. It has a configuration.

A drive flow control unit for varying the flow rate of the heat medium to the heat medium drive unit; a calorie measurement unit provided in the heat medium circulation path;
A drive flow control device that controls the drive flow control unit based on the detection signal of the calorie measuring unit is provided.

[0014] Further, a drive flow control section for varying the flow rate of the heat medium to the heat medium drive section, and a drive flow control section and a flow rate distribution section are controlled by a detection signal of a heat quantity measurement section provided in the heat medium circulation path. The configuration is such that a heat medium control device is provided.

A flow distribution control device for controlling a flow rate of a heat medium flowing to the heat exchange section in the flow distribution section in accordance with a temperature detected by a temperature detection section provided on the outlet side of the secondary flow path of the heat exchange section;
A configuration in which a drive flow rate control unit that varies a flow rate of a heat medium to the heat medium drive unit and a drive flow rate control device that controls the drive flow rate control unit based on a detection signal of a calorific value measurement unit provided in the heat medium circulation path are provided. And

A heating medium introduction passage communicating with the heating medium outlet pipe;
A heat medium circulation path in which a heat medium outflow passage communicating with a heat exchange section and a heat medium return pipe is sequentially connected; a heat medium drive flow path having a heat medium drive section of a circulation pump driven by a heat medium; A heating flow control unit configured to vary a flow rate of the heat medium to the exchange unit; a temperature detection unit provided on an outlet side of a secondary flow path of the heat exchange unit; and a calorie measurement unit provided in the heat medium circulation path. When the temperature difference between the heat medium inlet and the heat medium outlet of the calorie measuring unit becomes less than or equal to a predetermined value while the heat medium is flowing to the heat medium driving unit, the set value of the temperature detecting unit is increased to control the heating flow rate. A heat medium control device for controlling the section is provided.

A heat medium introduction passage communicating with the heat medium outlet pipe;
A heat medium circulation path in which a heat medium outflow passage communicating with a heat exchange section and a heat medium return pipe is sequentially connected; a heat medium drive flow path having a heat medium drive section of a circulation pump driven by a heat medium; A drive flow control unit that varies a heat medium flow rate to the medium drive unit, a heating flow control unit that varies a heat medium flow rate to the heat exchange unit, and a heat flow control unit that is provided at an outlet side of a secondary flow path of the heat exchange unit. Temperature detector, and a calorie measuring unit provided in the heat medium circulation path, and when the temperature difference between the heat medium inlet and the outlet of the calorie measuring unit becomes less than or equal to a predetermined value when the heat medium flows to the heat medium driving unit. A configuration is provided in which a heat medium flow control device that increases the heat medium flow rate to the heat medium drive unit and increases the set value of the temperature detection unit is provided.

[0018]

According to the first aspect of the present invention, when the circulation pump is operated, the flow of the heat medium is switched to the heat medium drive flow path side by the flow path switching section so that the total flow rate of the heat medium can be changed. It supplies to the drive unit to secure the drive power, and also supplies a part of the heat medium after driving the circulating pump to the heat exchange unit to prevent excessive temperature rise of the fluid in the secondary flow path and achieve stable heating. Things.

According to the second aspect of the present invention, when the circulation pump is operated, the entire flow rate of the heat medium is supplied to the heat medium drive section of the circulation pump to secure the driving power, and the heat medium of the heat medium after driving the circulation pump is driven. The amount of supply to the exchange section is controlled according to the temperature of the fluid outlet side of the secondary flow path of the heat exchange section, so that more stable heating is achieved.

According to a third aspect of the present invention, the fluid in the secondary flow path is circulated by operating the circulation pump with the heat medium, and the heat flow in the heat exchange section is caused by a decrease in the flow rate of the fluid in the secondary flow path or an increase in temperature. When the amount of exchange becomes small and the calorie measurement accuracy of the calorie measurement unit decreases, the drive flow control unit is operated by the drive flow control unit to increase the heat medium flow rate to the heat medium drive unit, and the secondary side flow The flow rate of the road is increased, and the heat load in the heat exchange unit is increased to ensure the accuracy of the calorimetric measurement by the calorimetric unit.

According to a fourth aspect of the present invention, when the amount of heat exchange in the heat exchanging unit during driving of the circulation pump becomes small and the accuracy of measuring the amount of heat used in the calorific value measuring unit decreases, the amount of heat exchange in the heat exchanging unit is reduced. The heat flow control unit and the flow rate distribution unit are operated by the heat medium control device so as to increase the flow rate of the heat medium, thereby stabilizing the calorific value measurement accuracy.

In the present invention, the supply amount of the heat medium to the heat exchange section after driving the circulation pump is controlled according to the fluid outlet side temperature of the secondary flow path of the heat exchange section, and furthermore, the circulation pump is driven. When the amount of heat exchange in the heat exchange unit becomes very small and the accuracy of measuring the amount of heat used in the calorie measurement unit decreases, the drive flow rate is controlled by the heat medium control unit to increase the amount of heat exchange in the heat exchange unit. By operating the unit and stably heating the fluid in the secondary flow path, the flow rate of the heat medium is increased to stabilize the calorimetric measurement accuracy.

According to a sixth aspect of the present invention, the circulation pump is operated with the heat medium to circulate the fluid in the secondary flow path, and the heat in the heat exchange section is reduced due to a decrease in the flow rate in the secondary flow path or an increase in the inflow temperature. When the exchange amount is reduced and the temperature difference between the heat medium inlet and outlet in the calorimeter is reduced and the calorimetric accuracy is degraded,
While increasing the fluid outlet temperature set point of the secondary flow path,
The heating flow rate control unit increases the flow rate of the heat medium to the heat exchange unit so as to have the increased set value, and stabilizes the calorific value measurement accuracy by increasing the heat exchange amount.

According to a seventh aspect of the present invention, the circulation pump is operated with the heat medium to circulate the fluid in the secondary flow path, and the heat in the heat exchange section is reduced due to a decrease in the flow rate in the secondary flow path or an increase in the inflow temperature. When the exchange amount is reduced and the temperature difference between the heat medium inlet and outlet in the calorimeter is reduced and the calorimetric accuracy is degraded,
Increase the flow rate of the heat medium to the heat medium drive unit to increase the flow rate of the secondary flow path, and further increase the set value of the fluid outlet temperature of the secondary flow path so that the set value becomes the increased set value. The heating fluid control unit increases the flow rate of the heat medium to the heat exchange unit, and further stabilizes the calorie measurement accuracy by further increasing the heat exchange amount.

[0025]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In addition,
The same reference numerals as those in the conventional example denote the same members and have the same functions, and a detailed description thereof will be omitted.

FIG. 1 shows a first embodiment of the present invention.
Reference numeral 1 denotes a heat medium introduction passage whose one end communicates with the heat medium supply pipe 2 and the other end communicates with the primary flow path 22a of the heat exchange section 22. A heat medium outflow passage communicating with the primary side flow passage 22a of the heat exchange unit 22 is a heat medium circulation passage in which the heat medium introduction passage 21, the heat exchange unit 22, and the heat medium outflow passage 23 are sequentially connected. Reference numeral 25 denotes a flow path switching unit provided in the heat medium introduction passage 21. The inlet side communicates with the heat medium outward pipe 2 and one end on the outlet side communicates with the heat exchange unit 22 and the other end on the outlet side connects with the heat medium driving unit 26. Communicate with Reference numeral 27 denotes a flow distribution unit provided on the outlet side of the heat medium drive unit 26, and reference numeral 28 denotes a heat medium drive flow path in which the flow path switching unit 25, the heat medium drive unit 26, and the flow distribution unit 27 are sequentially connected. One end on the outlet side of the flow distribution unit 27 is connected to the heat medium outflow passage 23, and the heat medium drive flow path 28 is provided in parallel with the heat exchange unit 22. The other end on the exit side of the flow distribution unit 27 is connected to the heat medium It is connected between the flow switching unit 25 and the heat exchange unit 22 of the introduction passage 21. Reference numeral 29 denotes a circulating pump that uses a heat medium as a drive source and is configured by connecting the heat medium drive unit 26 and the pump unit 30. The discharge side of the pump unit 30 is connected to the inlet side of the secondary flow path 22 b of the heat exchange unit 22. It is connected. 31 and 31 ′ are hot and cold water mixing taps, and hot water supply connection ports 31 a, 31 a ′, water supply connection ports 31 b,
31b 'and tap holes 31c, 31c'.
And the hot and cold water mixing taps 31 and 31 ′ are
a, 31a 'are connected to the outlet side of the secondary flow path 22b by the hot water supply pipe 32. Reference numeral 33 denotes a water supply pipe, which is connected to the water supply connection ports 31b, 31b 'and the inlet side of the secondary flow path 22b. Numeral 34 denotes a hot water supply return pipe connected to the inlet side of the secondary flow path 22b through the end of the hot water supply pipe 32 and the suction side of the pump section 30, and the pump section 30 and the secondary flow path 22
b, a hot water circulation path 35 which is annularly connected by the hot water supply pipe 32 and the hot water return pipe 34 is formed. 36 is a water supply pipe 33
This is a check valve for preventing the supply of water from the water through the pump section 30 to the hot water supply return pipe 34.

Next, the circulation pump 29 will be described with reference to FIG. 37 is a drive impeller provided in the heat medium drive unit 26,
Reference numeral 38 denotes a pump impeller provided in the pump unit 30. 39
Is a cylindrical drive-side magnet integrally attached to the drive impeller 37 via a holder 40, and 41 is provided at a position facing the drive-side magnet 39 and is integrally attached to the pump impeller 38. Pump side magnet,
42 is a drive side magnet 39 and a pump side magnet 41
Between the heat medium drive unit 26 and the pump unit 30 in an airtight manner. Reference numeral 43 denotes a drive rotation shaft that makes the drive impeller 37 rotatable. One end is supported by a bearing 44 provided in a concave portion of the partition wall 42, and the other end is supported by a bearing 46 provided in a drive side casing 45. Reference numeral 47 denotes a pump rotating shaft that makes the pump impeller 38 rotatable. One end of the pump rotating shaft is supported by a bearing 48 provided in a concave portion of the partition wall 42, and the other end is supported by a bearing 50 provided in a pump-side casing 49.

The drive impeller 37 and the pump impeller 38 are connected by a magnetic force by a drive-side magnet 39 and a pump-side magnet 41 so that power can be transmitted.

Reference numerals 51 and 52 denote a driving heat medium inlet and a driving heat medium outlet provided on the inlet side and the outlet side of the heat medium driving section 26, respectively. 53 and 54 are a pump inlet and a pump outlet provided on the inlet side and the outlet side of the pump unit 30. 5
Reference numeral 5 denotes an ejection hole on the upstream side of the driving impeller 37.

Next, the operation of this embodiment will be described. First, a description will be given of a case where the hot and cold water mixing taps 31, 31 'are closed and hot water is not used. When the temperature of the hot water in the hot water circulation path 35 is low, the flow path switching unit 25 is switched to the heat medium drive flow path 28 side to be opened, and the heat medium flowing through the heat medium outlet pipe 2 is turned off as shown by a white arrow in FIG. The liquid is guided to the heat medium introduction passage 21, and flows into the heat medium drive unit 26 of the circulation pump 29 through the flow path switching unit 25 as indicated by the solid arrow. The heat medium that has flowed into the heat medium drive unit 26 is ejected toward the drive impeller 37 through the ejection holes 55 to rotate the drive impeller 37 and to drive the drive medium outlet 5
It flows out from 2. Due to the rotation of the drive impeller 37, the pump impeller 38 connected by the drive side magnet 39 and the pump side magnet 41 by the attraction of the magnet rotates. The rotation of the pump impeller 38 causes the hot water circulation path 35 to rotate.
The hot and cold water circulates through the pump section 30 as indicated by the thick solid line arrow.

On the other hand, the heat medium that has exited the heat medium driving unit 26 enters the flow distribution unit 27, and a part of the heat medium is supplied to the heat exchange unit 2 at a preset flow rate so as not to overheat the fluid in the secondary flow path 22b.
2 flows into the primary side flow path 22a and the remainder flows out directly to the heat medium outflow passage 23. The heat medium that has flowed into the primary flow path 22a of the heat exchange section 22 exchanges heat with the hot water that has flowed into the secondary flow path 22b of the heat exchange section 22 through the pump section 30,
The hot water is heated and heated to enter the heat medium outlet passage 23 and join the heat medium directly entering from the flow distribution unit 27 to form the heat medium return pipe 3.
Leaked to

In this way, the hot water in the hot water circulation path 35 is heated and kept warm by the hot water keeping operation for the next hot water supply use.

Next, a case where the hot and cold water mixing taps 31 and 31 'are opened to use hot water will be described. At the time of hot water supply, the flow path switching unit 25 is switched to the primary flow path 22a side of the heat exchange unit 22 to be opened, and the heat medium flows into the heat medium circulation path 24 passing through the heat exchange unit 22 as indicated by the dashed arrow. . At this time, since the heat medium does not flow into the heat medium drive unit 26, the pump unit 30 does not operate, and the circulation of the hot water in the hot water circulation path 35 is stopped.

On the other hand, water is supplied from the water supply pipe 33 to the secondary flow path 22b of the heat exchange section 22 together with the opening of the hot and cold water mixing taps 31, 31 ', and is heated by the heat medium flowing through the primary flow path 22a to become hot water. Hot water mixer tap 31, 3 through outgoing pipe 32
1 'to the hot water supply connection ports 31a, 31a'.

Immediately after the hot water mixing taps 31 and 31 'are opened, the hot water secured in the hot water supply pipe 32 is discharged from the hot water outlets 31c and 31c' by the hot water warming operation described above, and thereafter the hot water is supplied by opening. The heated hot water then taps.

As described above, the hot water can be readily discharged without waiting time immediately after opening, and the convenience is improved. The same applies to the case where hot water of an arbitrary temperature is discharged from tap holes 31c, 31c 'by adding water from the water supply connection ports 31b, 31b'.

As described above, since the heat medium that constantly circulates through the heat medium return pipe 2 and the heat medium return pipe 3 is used as the drive source of the circulation pump 29, the electricity cost in the case of the conventional electric motor drive is unnecessary, and low running is achieved. Economical improvement can be achieved by increasing costs, and noise can be reduced by eliminating the noise generated by the operation of the electric motor. It is especially effective for

Further, when the circulating pump 29 is operated, the entire amount of the heat medium that has entered each dwelling unit through the heat medium introduction passage 21 can be supplied to the heat medium drive unit 26 without being separately diverted. The flow rate of the heat medium can be minimized to only the necessary flow rate, and when using heat such as hot water supply, the flow path of the heat medium is switched to stop the supply to the heat medium drive unit 26. There is no increase in the flow rate of the heat medium to each dwelling unit due to simultaneous use. For this reason, the load on the heat medium circulation pump (not shown) that constantly circulates the heat medium to the house building can be reduced, and the cost of the house building equipment can be prevented, and the equipment can be provided at a lower cost.

In addition, since the heat medium after driving the circulation pump 29 is diverted and part of the heat medium is used for heating the fluid in the secondary flow path 22b, the balance between the driving force and the heating amount can be easily designed, so that an inexpensive system can be used. Can be supplied, and excessive heating of the secondary fluid can be prevented, thereby improving reliability.

Next, a second embodiment of the present invention will be described with reference to FIG. The same members and the same functions as those of the first embodiment of the present invention shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

Reference numeral 56 denotes a temperature detection unit provided on the outlet side of the secondary flow path 22b of the heat exchange unit 22, and reference numeral 57 denotes a flow distribution unit provided on the downstream side of the heat medium driving unit 26. One end on the outlet side of the flow distribution unit 57 is connected to the heat medium outlet passage 23, and the other end on the outlet side is connected between the flow switching unit 25 and the heat exchange unit 22 of the heat medium introduction passage 21.

Reference numeral 58 denotes a flow rate distribution control device for controlling the flow rate of the heat medium flowing to the heat exchange section 22 in the flow rate distribution section 57 in accordance with the temperature detected by the temperature detection section 56. The temperature detector 56 and the flow distributor 57 are electrically connected via a flow distribution controller 58.

Next, the operation of this embodiment will be described when the hot and cold water mixing taps 31 and 31 'are closed and hot water is not used.

When the temperature of the hot water in the hot water circulation path 35 is low,
The flow path switching unit 25 is switched to the heat medium drive flow path 28 side and opened,
The heat medium flowing through the heat medium outlet pipe 2 is guided to the heat medium introduction passage 21, and flows into the heat medium drive unit 26 of the circulation pump 29 through the flow path switching unit 25 as indicated by a solid line arrow. The pump unit 30 is operated in the same manner as in the embodiment. By the operation of the pump section 30, the hot water in the hot water circulation path 35 circulates as shown by the thick solid line arrow, and in the heat exchange section 22, heat exchanges with the heat medium diverted by the flow distribution section 57 to increase the temperature. You. The temperature of the hot water that has been heated and exited the secondary flow path 22 b of the heat exchange unit 22 is detected by the temperature detection unit 56.

First, when the temperature detected by the temperature detecting section 56 is higher than a predetermined value, the distribution amount of the heat medium in the flow distribution section 57 is changed by the flow distribution control device 58, and the flow rate of the heat medium to the heat exchange section 22 is changed. Reduce.

As the flow rate of the heat medium to the heat exchange section 22 decreases, the heating capacity decreases, and the temperature of the hot water at the outlet side of the secondary flow path 22b decreases to reach a predetermined value.

Next, when the temperature detected by the temperature detecting section 56 is lower than the predetermined value, the flow rate distribution control device 58 increases the flow rate of the heat medium to the heat exchange section 22 in the flow rate distribution section 57. As the flow rate of the heat medium to the heat exchange section 22 increases, the heating capacity increases, and the temperature of the hot water at the outlet side of the secondary flow path 22b rises to reach a predetermined value.

As described above, the hot water keeping operation is performed in preparation for the hot water supply, the hot water in the hot water circulation path 35 is heated and kept at a predetermined value, and the next time the hot water is used, the hot water mixing taps 31 and 31 'are turned on. Immediate hot-water property that hot water flows out at a stable temperature immediately after opening is ensured.

When the hot and cold water mixing taps 31 and 31 'are opened and hot water is used, the operation is the same as that of the first aspect of the present invention, and the description is omitted.

As described above, since the heat medium that constantly circulates in the house is used as the drive source of the circulation pump 29, the electricity cost generated when the conventional electric motor is driven is not required, and the running cost can be reduced and the economy can be improved. The noise generated by the motor is eliminated and noise can be reduced, improving comfort. Furthermore, when the circulating pump 29 is operated, the entire amount of the heat medium flowing into each dwelling unit is applied to the heating medium drive unit 26, thereby minimizing the flow rate of the heat medium to each dwelling unit when the circulating pump 29 is operated, and also supplying hot water. A heat medium circulating pump (not shown) that prevents the simultaneous use of the heat medium drive when the heat is used, prevents the flow of the heat medium to each housing unit from increasing, and constantly circulates the heat medium to the house. Therefore, it is possible to prevent an increase in the cost of the house building equipment, and to provide a heat utilization device at a lower cost.

In addition, since the temperature of the fluid flowing through the secondary flow path is stably heated to an appropriate value, comfort and reliability are improved, and an increase in heat radiation loss due to unnecessary temperature rise can be prevented. Energy and low running cost are improved.

Next, a third embodiment of the present invention will be described with reference to FIG. The same members and the same functions as those of the first embodiment of the present invention shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

Reference numeral 59 denotes a calorie measuring unit provided in the heat medium circulation path 24, which measures a temperature difference between an inlet temperature detecting unit 60 provided in the heat medium introducing passage 21 and an outlet temperature detecting unit 61 provided in the heat medium outflow passage 23. The differential temperature detecting unit 62 to be detected, the heat medium flow detecting unit 63 provided in the heat medium outflow passage 23, and the heat amount connected to the differential temperature detecting unit 62 and the heat medium flow detecting unit 63 and used by the product of the differential temperature and the heat medium flow amount And a calorific value calculation unit 64 for calculating.

Numeral 65 denotes a drive flow rate control section for varying the flow rate of the heat medium to the heat medium drive section 26.
6, provided in the heat medium drive flow path 28 to which the flow distribution sections 27 are sequentially connected.

Reference numeral 66 denotes a drive flow rate control device electrically connected to the heat quantity measurement section 59 and the drive flow rate control section 65.
And the flow rate of the heat medium is varied.

Next, the operation of this embodiment will be described when the hot and cold water mixing taps 31, 31 'are closed and hot water is not used.

When the temperature of the hot water in the hot water circulation path 35 is low,
The flow path switching unit 25 is switched to the heat medium drive flow path 28 side and opened,
The heat medium flowing through the heat medium outlet pipe 2 is guided to the heat medium introduction passage 21 and flows into the heat medium drive section 26 of the circulation pump 29 through the flow path switching section 25 as shown by a solid line arrow. The pump unit 30 is operated in the same manner as in the embodiment of item 1. By the operation of the pump unit 30, the hot water in the hot water circulation path 35 circulates as shown by the thick solid line arrow, and in the heat exchange unit 22, heat exchanges with the heat medium diverted by the flow distribution unit 27 to increase the temperature. You.

The heat medium that has flowed into the heat medium drive unit 26 and operated the pump unit 30 enters the flow distribution unit 27, a part of which flows to the heat exchange unit 22 as described above, and the rest directly flows out of the heat medium. While entering the passage 23, it merges with the heat medium exiting the heat exchange section 22 and flows out to the heat medium return pipe 3.

In this way, the hot water in the hot water circulation path 35 is heated and kept warm so that hot water can be obtained immediately after opening when the next hot water supply is used. By the way, since the heat of the heat medium is slightly used during the hot water keeping operation, the calorie measuring unit 59 is used.
In the temperature difference between the heat medium inlet temperature detected by the inlet temperature detector 60 and the heat medium outlet temperature detected by the outlet temperature detector 61, the temperature difference detector 62 detects the temperature difference.
The product of the heat medium flow rate detected in step 3 and the above-mentioned temperature difference is calculated by the calorific value calculation unit 64 to calculate the amount of used heat. However,
For example, when the flow resistance of the hot water circulation path 35 is increased due to a long pipe length of the hot water circulation path 35 due to a difference in installation conditions, the amount of hot water circulation by the pump unit 30 decreases, The heat exchange capacity of the exchange unit 22 is reduced, and the difference in the amount of heat exchange heat reduces the temperature difference detected by the temperature difference detection unit 62, thereby deteriorating the measurement accuracy and making it impossible to calculate an accurate heat use amount. As described above, when the calorie measuring unit 59 cannot calculate an accurate calorific value, the driving flow controller 65 controls the driving flow controller 65 based on the detection signal of the calorie measuring unit 59 to supply the heat medium to the heating medium driver 26. Vary the flow rate. Figure 5 is a pump unit flow rate Q through the pump unit 30 as characteristic driving heat medium flow rate Q _d flowing through the heat medium driving unit 26 shows a time flow path specifications fixing the pump side of the circulation pump 29 is increased
_It has the property that _p increases.

In the case of the circulating pump 29 having this characteristic, if the calorie measuring section 59 cannot calculate an accurate calorific value,
The drive flow control device 66 controls the drive flow control unit 65 so as to increase the flow rate of the heat medium to the heat medium drive unit 26 based on the detection signal of the heat amount measurement unit 59.

Due to the increase in the flow rate of the driving heat medium, the circulation amount of hot water flowing through the pump section 30 increases, the heat exchange flow rate in the heat exchange section 22 increases, and the temperature difference detected by the temperature difference detection section 62 increases. An accurate calorific value can be calculated.

In this way, the hot water keeping operation can be continued while maintaining the calorie measurement accuracy. In addition, hot and cold mixing tap 31,
When the hot water supply is used by opening 31 ′, the calorie measuring operation of the calorie measuring unit 59 is the same as that in the above-mentioned hot water warming operation, and the other is the same as the operation in claim 1 of the present invention, so the description is omitted. .

As described above, since the heat medium that constantly circulates in the house is used as the drive source of the circulation pump 29, the electricity cost generated when the conventional electric motor is driven becomes unnecessary, and the running cost can be reduced and the economy can be improved. The noise generated by the motor is eliminated and noise can be reduced, improving comfort.

In addition, since the flow rate of the driving heat medium can be varied to maintain the measurement accuracy of the amount of heat used, the reliability of the apparatus can be improved, and a wide variety of design conditions for the hot water circulation path can be achieved. The degree can be improved.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The same members and the same functions as those of the first embodiment of the present invention shown in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted.

Reference numeral 59 denotes a calorific value measuring section provided in the heat medium circulation path 24, and detects a temperature difference between an inlet temperature detecting section 60 provided in the heat medium introducing passage 21 and an outlet temperature detecting section 61 provided in the heat medium outflow path 23. The temperature difference detecting portion 62 to be detected, the heat medium flow detecting portion 63 provided in the heat medium outflow passage 23, and the temperature difference detecting portion 62 is connected to the heat medium flow detecting portion 63 and used by the product of the detected temperature difference and the heat medium flow amount. A calorific value calculating unit 64 for calculating the calorific value.

Reference numeral 65 denotes a drive flow rate control section for varying the flow rate of the heat medium to the heat medium drive section 26. The flow path switching section 25 and the heat medium drive section 2
6, provided in the heat medium drive flow path 28 to which the flow distribution sections 27 are sequentially connected.

Reference numeral 67 denotes a calorie measuring unit 59 and a driving flow control unit 6
5 is a heat medium control device electrically connected to the flow rate distribution unit 27 and controls the drive flow rate control unit 65 and the flow rate distribution unit 27 according to the detection signal of the heat quantity measurement unit 59 to vary the flow rate of the heat medium.

Next, the operation of this embodiment will be described when the hot and cold water mixing taps 31 and 31 'are closed and hot water is not used. When the temperature of the hot water in the hot water circulation path 35 (for example, the temperature on the inlet side of the pump section 30) is low, the flow path switching section 25 is switched to the heat medium drive flow path 28 side and opened to flow through the heat medium outlet pipe 2. The heat medium is guided to the heat medium introduction passage 21 as shown by a white arrow in FIG. 6, and flows into the heat medium drive unit 26 of the circulation pump 29 through the flow path switching unit 25 as shown by the solid arrow. The heat medium flowing into the heat medium driving unit 26 performs the same operation as in the embodiment of the first aspect of the present invention, and flows through the pump unit 30 into the secondary flow path 22b of the heat exchange unit 22. Then, the hot water is heated and heated to enter the heat medium outlet passage 23 and merge with the heat medium directly entering from the flow distribution part 27 to flow out to the heat medium return pipe 3.

By such a hot water warming operation for preparing hot water immediately after opening when the next hot water supply is used, the hot water in the hot water circulation path 35 is stably heated without excessively increasing the required temperature. maintain.

When the temperature of the hot water in the hot water circulation path 35 (for example, the inlet temperature of the pump section 30) rises, the hot water keeping operation is stopped. During the hot water keeping operation, if the amount of circulating hot water decreases, or if the heat exchange capacity of the heat exchange unit 22 decreases, the difference in the amount of heat exchange reduces the temperature difference detection unit 62.
If the temperature difference detected by the sensor becomes small, the measurement accuracy will deteriorate,
It becomes impossible to calculate the exact amount of heat used. In order to prevent such a case where the calorie measuring unit 59 cannot calculate an accurate calorific value, the heat medium control unit 66 controls the drive flow controller 65 based on the detection signal of the calorie measuring unit 59 to control the heat amount. The flow rate of the heat medium to the medium drive unit 26 is changed, and the flow rate distribution unit 27 is controlled to control the flow rate of the fluid in the secondary flow path 22b due to the excessive flow rate of the heat medium flowing into the primary flow path 22a of the heat exchange unit 22. Prevent excessive heating. When the temperature difference detected by the temperature difference detection unit 62 decreases, the heat medium control unit 67 controls the drive flow rate control unit 65 so that the heat amount measurement unit 59 increases the flow rate of the heat medium to the heat medium drive unit 26. .

Due to the increase in the flow rate of the driving heat medium, the amount of hot water circulating through the pump section 30 of the circulation pump 29 increases, the amount of heat exchange heat in the heat exchange section 22 increases, and the temperature difference detected by the temperature difference detection section 62 increases. Is increased, and the measurement accuracy is recovered, so that an accurate calorific value can be calculated.

At the same time, the flow rate distribution unit 27 controls the flow rate of the heat medium to the heat exchange unit 22 by the heat medium control unit 66 so as to match the increase in the amount of heat exchange heat due to the increase in the flow rate of the drive heat medium. The fluid of 22b is stably heated.

As described above, while maintaining the calorific value measurement accuracy, stable heating is performed and instant hot water retention is performed. In addition, hot and cold mixing tap 3
When the hot water supply is used by opening 1, 31 ', the calorie measuring unit 59
The calorie measurement operation is the same as in the above hot water warming operation,
The other operations are the same as those of the first aspect of the present invention, and the description is omitted.

As described above, when the measurement accuracy of the calorie measuring unit 59 deteriorates due to the decrease in calorific value, the flow rate of the heat medium to the heat medium driving unit 26 is increased to increase the flow rate of the circulating pump 29, thereby keeping the hot water warm. Since the operation can be continued, the reliability of the calorimetric measurement accuracy can be improved, and the workability can be improved by expanding the applicable working conditions of the system.

Next, a fifth embodiment of the present invention will be described with reference to FIG. It should be noted that claim 1 of the present invention shown in FIG.
The same reference numerals are given to the same members and the same functions as those of the embodiment, and the detailed description is omitted.

Reference numeral 68 denotes a temperature detection unit provided on the outlet side of the secondary flow path 22b of the heat exchange unit 22, and reference numeral 69 denotes a flow distribution unit provided on the downstream side of the heating medium drive unit 26. One end on the outlet side of the flow distribution unit 69 is connected to the heat medium outlet passage 23, and the other end on the outlet side is connected to the flow switching unit 25 of the heat medium introduction passage 21 and the heat exchange unit 2.
Connected between the two.

Numeral 70 is a flow distribution control device for controlling the flow rate of the heat medium flowing to the heat exchange section 22 in the flow distribution section 69 in accordance with the temperature detected by the temperature detection section 68. The temperature detection section 68 and the flow distribution section 69 They are electrically connected via a distribution control device 70.

Reference numeral 71 denotes a calorie measuring unit 59 and a driving flow control unit 6
The drive flow control device 65 is electrically connected to the control unit 5, and the drive flow control unit 65 variably controls the flow rate of the heat medium flowing to the heat medium drive unit 26 based on the detection signal of the heat amount measurement unit 59.

Next, the operation of this embodiment will be described when the hot and cold water mixing taps 31, 31 'are closed and hot water is not used.

When the temperature of hot water in the hot water circulation path 35 (for example, the inlet side temperature of the pump section 30) is low, the flow path switching section 2
5 is switched and opened to the heat medium drive flow path 28 side, the heat medium flowing through the heat medium outlet pipe 2 is guided to the heat medium introduction path 21, and passes through the flow path switching section 25 as indicated by the solid line arrow, and the circulation pump 29 is opened. The pump unit 30 is caused to flow into the heat medium driving unit 26 and the pump unit 30 is operated in the same manner as in the embodiment of the first embodiment. By the operation of the pump unit 30, the hot water in the hot water circulation path 35 circulates as shown by the thick solid line arrow, and exchanges heat with the heat medium diverted by the flow distribution unit 69 in the heat exchange unit 22 to be heated and heated. You. The temperature of the hot water that has been heated and exited the secondary flow path 22b of the heat exchange unit 22 is detected by the temperature detection unit 68.

First, when the temperature detected by the temperature detecting section 68 is higher than a predetermined value, the flow rate distribution control device 70 changes the amount of the heat medium distributed in the flow rate distribution section 69 to change the flow rate of the heat medium to the heat exchange section 22. Reduce.

As the flow rate of the heat medium to the heat exchange section 22 decreases, the heating capacity decreases, and the temperature of the hot water at the outlet side of the secondary flow path 22b decreases to reach a predetermined value.

Next, when the temperature detected by the temperature detecting section 68 is lower than the predetermined value, the flow distribution control device 70 increases the flow rate of the heat medium to the heat exchange section 22 in the flow distribution section 69. As the flow rate of the heat medium to the heat exchange section 22 increases, the heating capacity increases, and the temperature of the hot water at the outlet side of the secondary flow path 22b rises to reach a predetermined value.

As described above, the hot water keeping operation is performed in preparation for the hot water supply, and the hot water in the hot water circulation path 35 is heated and kept at a predetermined value. When the next hot water supply is used, the hot water mixing taps 31 and 31 'are turned on. Immediate hot-water property that hot water flows out at a stable temperature immediately after opening is ensured.

When the temperature of the hot water (for example, the inlet temperature of the pump section 30) in the hot water circulation path 35 rises, the hot water keeping operation is stopped.

However, when the accuracy of the calorific value measurement by the calorie measuring unit 59 is deteriorated by the miniaturization of the heat exchange heat amount of the heat exchanging unit 22 in the hot water keeping operation, for example, the instant hot water circulation path 35
When the flow resistance of the hot water circulation path 35 is large due to a difference in installation conditions such as a long pipe flow, the pump section 30
The heat exchange part 22
In this case, the heat exchange capacity is reduced, and the calorific value measurement accuracy is degraded due to the miniaturization of the heat exchange heat amount, so that accurate heat amount cannot be calculated.

Therefore, in the case where the accuracy of the calorific value measurement is deteriorated, the drive flow control device is configured to increase the flow rate of the heat medium to the heat medium drive unit 26 by the detection signal of the calorie measuring unit 59 in order to prevent the accuracy deterioration. 71 controls the drive flow rate control unit 65.

Due to the increase in the flow rate of the driving heat medium, the amount of circulation of hot water flowing through the pump section 30 increases, the amount of heat exchange heat in the heat exchange section 22 increases, and the temperature difference in the temperature difference detection section 62 increases. A large amount of heat can be calculated. In addition, even when the flow rate of the driving heat medium increases, the flow distribution control device 70 controls the flow distribution section 69 such that the outlet hot water temperature of the secondary flow path 22b detected by the temperature detection section 68 becomes a predetermined value.

In this way, even when the heat exchange heat quantity decreases, the hot water keeping operation can be performed while maintaining the calorie measurement accuracy while keeping the hot water temperature in the secondary flow path at a predetermined value.

When the hot and cold water mixing taps 31 and 31 'are opened to use hot water, the description is omitted because it is the same as in the first embodiment of the present invention.

As described above, even when the calorific value measurement accuracy deteriorates, the heat exchange amount is increased to secure the calorific value measurement accuracy.
The instantaneous hot water keeping operation of stable predetermined constant temperature heating can be realized, the comfort can be improved by the constant temperature, the reliability of the calorie measurement accuracy can be improved, and the workability can be improved by expanding the applicable working conditions of the system.

In addition, the heating can be stably performed at the optimally set temperature regardless of the flow rate of the secondary flow path 22b in the circulation pump 29, the heat radiation loss in the hot water circulation path 35 can be minimized, and the energy saving can be improved. The running cost can be reduced.

Next, a sixth embodiment of the present invention will be described with reference to FIG. The same members and the same functions as those of the first embodiment of the present invention shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

Reference numeral 72 denotes a circulation pump 29 driven by a heat medium.
A heat medium drive flow path having a heat medium drive section 26, a heating flow rate control section 73 for varying the flow rate of the heat medium to the primary flow path 22a of the heat exchange section 22, and a secondary flow path 74 of the heat exchange section 22 This is a temperature detection unit provided on the exit side of the path 22b.

Reference numeral 75 denotes a heating flow controller which raises the set value when the temperature difference between the heat medium inlet and the heat medium outlet of the calorie measuring section 59 becomes smaller than a predetermined value while the heat medium is flowing to the heat medium driving section 26. 73 is a heat medium control device that controls the heat amount measurement unit 5
9. The heating flow controller 73 and the temperature detector 74 are electrically connected to the heat medium controller 75.

Next, the operation of this embodiment will be described when the hot and cold water mixing taps 31 and 31 'are closed and hot water is not used.

When the temperature of hot water in the hot water circulation path 35 (for example, the inlet temperature of the pump section 30) is low, the flow path switching section 25
Is switched to the heat medium drive channel 72 side, and the circulation pump 29 is opened.
And the pump unit 30 is operated. By the operation of the pump section 30, the hot water in the hot water circulation path 35 circulates as shown by the thick solid line arrow, and the heat exchange section 22 sets the flow rate by the heating flow rate control section 73 and exchanges heat with the inflowing heating medium to heat. Perform the hot water warming operation to raise the temperature. The temperature of the hot water that has been heated and exited the heat exchange unit 22 is determined by the temperature detection unit 74.
It is detected by.

The amount of heat used to heat and raise the temperature of the hot water in the hot water circulation path 35 is calculated by a heat amount measurement section 59 provided in the heat medium circulation path 24.

Here, when the accuracy of the calorimetric measurement by the calorimetric measuring section 59 is sufficiently ensured and the detected temperature of the temperature detecting section 74 is not at the set value, the heating medium control device 75 performs the heating. Activate the flow control unit 73 and set the heat exchange unit 2
The flow rate of the heat medium to 2 is varied.

That is, when the temperature detected by the temperature detecting section 74 is higher than the set value, the flow rate of the heat medium to the heat exchanging section 22 is reduced.
When the temperature detected by the temperature detection unit 74 is lower than the set value, the flow rate of the heat medium to the heat exchange unit 22 is increased to adjust the temperature of the hot water at the outlet side of the secondary flow path 22b to the set value.

However, when the accuracy of the calorific value measurement by the calorie measuring unit 59 is deteriorated, that is, when the heat flow resistance of the hot water circulation path is large due to a difference in construction conditions and the like, the amount of hot water circulation is reduced, and the heating water is used for heating. If the difference in temperature between the heat medium inlet and heat medium outlet is small due to the small amount of heat and the detection accuracy is degraded,
When the temperature difference between the heat medium inlet and the heat medium outlet falls below a predetermined value in order to prevent accuracy deterioration beforehand, the heat medium control device 75 raises the set value and operates the heating flow rate control unit 73 to operate the heat exchange unit 2.
The flow rate of the heat medium to 2 is varied, and the temperature is increased by heating so that the set value is increased.

As described above, by raising the set temperature on the outlet side of the secondary flow path 22b, the amount of heat required for heating and raising the temperature is increased, and the accuracy of the calorimetric measurement by the calorimetric unit 59 is ensured.
Note that the operation of increasing the set value can be sequentially repeated until the calorific value measurement accuracy is secured.

When the temperature of the hot water in the hot water circulation path 35 (for example, the inlet temperature of the pump section 30) rises as described above, the hot water keeping operation is stopped.

When the hot and cold water mixing taps 31 and 31 'are opened to use hot water, the description is omitted because it is the same as in the first embodiment of the present invention.

As described above, when the calorific value measurement accuracy deteriorates, the hot water heating temperature of the secondary flow path is raised to realize the hot water keeping operation with the calorific value measurement accuracy, and the reliability of the calorie measurement accuracy is improved. The improvement of the workability can be achieved by the improvement and the expansion of the work conditions applicable to the system.

In addition, since the calorific value measurement accuracy is ensured by changing the set value for heating and raising the temperature, the system configuration can be simplified and an inexpensive system can be provided.

Next, a seventh embodiment of the present invention will be described with reference to FIG. The same members and the same functions as those of the first embodiment of the present invention shown in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted.

Reference numeral 76 denotes a circulating pump 29 driven by a heat medium.
A heat medium drive channel having a heat medium drive section 26; 77, a drive flow rate control section for varying the heat medium flow rate to the heat medium drive section 26;
Is a heating flow controller that varies the flow rate of the heat medium to the primary flow path 22a of the heat exchange section 22, and 79 is a temperature detection section provided on the outlet side of the secondary flow path 22b of the heat exchange section 22. When the temperature difference between the heat medium inlet and the heat medium outlet of the calorie measuring unit 59 becomes smaller than a predetermined value when the heat medium flows into the heat medium drive unit 26, the flow rate of the heat medium to the heat medium drive unit 26 increases and the detection temperature 80 A heat medium flow control device for increasing the set value,
9. The drive flow control unit 77, the heating flow control unit 78, and the temperature detection unit 79 are electrically connected to the heat medium flow control device 79.

Next, the operation of this embodiment will be described when the hot and cold water mixing taps 31 and 31 'are closed and hot water is not used.

When the temperature of the hot water in the hot water circulation path 35 (for example, the temperature on the inlet side of the pump section 30) is low, the flow path switching section 2
5 is switched to the heat medium drive flow path 76 side, and the circulation pump 2 is opened.
The pump unit 30 is operated by flowing into the heat medium driving unit 26 of No. 9.

By the operation of the pump section 30, the hot water in the hot water circulation path 35 circulates as shown by the thick solid line arrow, and the heat exchange section 22 sets the flow rate by the heating flow rate control section 78 and exchanges heat with the flowing heat medium. Then, a hot water keeping operation of heating and raising the temperature is performed. The temperature of the hot water that has been heated and exited the heat exchange unit 22 is detected by the temperature detection unit 79.

The amount of heat used to heat and raise the temperature of the hot water in the hot water circulation path 35 is calculated by a heat amount measurement section 59 provided in the heat medium circulation path 24.

Here, if the accuracy of the calorimetric measurement by the calorimetric measuring section 59 is sufficiently ensured and the temperature detected by the temperature detecting section 79 is lower than the set value, the heating medium flow controller 8
0, the heating flow control unit 78 is operated, and the heat exchange unit 22 is operated.
To change the flow rate of the heat medium.

That is, when the temperature detected by the temperature detecting section 79 is higher than the set value, the flow rate of the heat medium to the heat exchanging section 22 is reduced.
When the temperature detected by the temperature detection unit 79 is lower than the set value, the flow rate of the heat medium to the heat exchange unit 22 is increased to adjust the temperature of the hot water at the outlet side of the secondary flow path 22b to the set value.

However, when the accuracy of the calorific value measurement by the calorie measuring unit 59 deteriorates, that is, when the hot water circulation path 35 has a large water flow resistance due to a difference in construction conditions or the like and the amount of hot water circulation decreases, or when the system operating conditions When the hot water temperature (for example, the inlet side temperature of the pump unit 30) is high due to the difference in the temperature, etc., the amount of heat used for heating and heating is very small, so the temperature difference between the inlet and outlet of the heating medium is small, and this temperature difference The detection accuracy of is deteriorated.

Therefore, in order to prevent this deterioration in accuracy,
When the detected temperature difference between the heat medium inlet and the heat medium outlet becomes equal to or less than a predetermined value, the drive flow control unit 77 is operated by the heat medium flow control device 80 to increase the heat medium flow to the heat medium drive unit 26, and the pump unit 30, the amount of hot water circulated in the hot water circulation path 35 is increased, and the set value of the temperature detection section 79 is further increased, and the heating medium flow control section 78 is operated by the heating medium flow control device 80 to supply heat to the heat exchange section 22. The heating medium is heated and heated so that the flow rate of the heating medium is varied and the set value is increased.

As described above, by increasing the circulation amount of the hot water flowing through the secondary flow path 22b and increasing the heating temperature, the amount of heat required for heating and raising the temperature is increased. Ensure more secure.

The operation of increasing the flow rate of the heat medium to the heat medium drive unit 26 and the operation of increasing the set value of the temperature rise can be sequentially repeated until the accuracy of measuring the amount of heat is secured.

As described above, when the temperature of the hot water (for example, the temperature on the inlet side of the pump section 30) in the hot water circulation path 35 rises, the hot water keeping operation is stopped.

When the hot and cold water mixing taps 31 and 31 'are opened to use hot water, the description is omitted because it is the same as in the first embodiment of the present invention.

As described above, since the heat medium that constantly circulates in the house is used as the drive source of the circulation pump 29, the electricity cost generated when the conventional electric motor is driven becomes unnecessary, and the running cost can be reduced and the economy can be improved. The noise generated by the motor is eliminated and noise can be reduced, improving comfort.

Further, when the calorie measurement accuracy is deteriorated, the hot water circulating amount and the hot water heating temperature of the secondary flow path are increased to realize a hot water warming operation in which the calorie measurement accuracy is further ensured. It is possible to improve the reliability of the measurement accuracy and the workability by expanding the applicable operating conditions of the system, and to improve the practicality by expanding the operating conditions under which the system can operate.

[0124]

As described above, the heat utilization device of the present invention has the following effects. (1) A heat medium driving flow path in which a flow path switching unit, a heat medium driving unit of a circulation pump using a heat medium as a driving source, and a flow distribution unit are sequentially connected to a heat medium circulation path having a heat exchange unit. However, since one end on the outlet side of the flow distribution unit is connected to the outlet side of the heat medium circulation path, and the other end on the outlet side is connected to the inlet side of the heat exchange unit, the use of a heat medium as a drive source lowers the flow rate. The economy can be improved by lowering running costs, and the comfort can be improved by lowering noise. (2) The cost of the housing building can be reduced by reducing the load on the heat medium circulation pump in the house. (3) The cost of the apparatus is reduced and the reliability is improved by facilitating the balance design between the driving force of the circulation pump and the heating amount of the heat exchange section. (4) Since the flow rate distribution control device that controls the flow rate of the heat medium diverted to the heat exchange section according to the fluid temperature at the outlet side of the secondary flow path of the heat exchange section is provided, the secondary flow path is provided. In addition to improving the comfort and reliability by stably heating the fluid to an appropriate value as required, energy saving and low running cost can be improved by suppressing heat dissipation loss. (5) Since the drive flow rate control device that controls the drive flow rate control section based on the detection signal of the heat quantity measurement section provided in the heat medium circulation path is provided, the flow rate of the drive heat medium is made variable, and the measurement accuracy of the used heat quantity is adjusted. , The reliability of the device can be improved. (6) Since the heat flow control unit and the heat flow control unit that controls the flow rate distribution unit based on the detection signal of the heat flow measurement unit provided in the heat transfer circuit are provided, the heat flow measurement accuracy and reliability are improved, and construction conditions are improved. The workability can be improved by enlarging the size. (7) A temperature detection unit on the outlet side of the secondary flow path, a flow distribution control device that varies the flow rate of the heat medium to the heat exchange unit in accordance with the detected temperature by the flow distribution unit, a drive flow control unit, and a calorie measurement It is configured to have a drive flow rate control device that controls the drive flow rate control unit by the detection signal of the unit, so the comfort is improved by constant temperature heating by the flow distribution control of the heat medium, and the heat flow measurement accuracy is improved by the drive flow rate control by the detection signal. The workability can be improved by improving the reliability and expanding the work conditions. (8) The temperature difference between the heating flow rate control unit that varies the flow rate of the heat medium to the heat exchange unit, the temperature detection unit on the outlet side of the secondary flow path, and the temperature difference between the heat quantity measurement unit when the heat medium flows to the heat medium drive unit is predetermined. When the temperature falls below the value, the heating medium control device that controls the heating flow rate control unit by increasing the setting value of the temperature detection unit is provided.By changing the heating setting value, the accuracy of heat quantity measurement is improved and the construction conditions are expanded. Can improve workability. Further, the system can be simplified by improving the calorimetric measurement accuracy, and the initial cost can be reduced. (9) The temperature difference between the heating flow rate control section that varies the flow rate of the heat medium to the heat exchange section, the temperature detection section on the outlet side of the secondary flow path, and the temperature difference between the heat quantity measurement section when the heat medium flows to the heat medium drive section is predetermined. When the heat medium flow rate becomes equal to or less than the value, the heat medium flow rate to the heat medium drive unit is increased and the heat medium flow rate control device that raises the set value of the temperature detection unit is provided. In addition, it is possible to further improve the calorie measurement accuracy and the workability by expanding the work conditions. (10) The practicality can be improved by expanding the operable operating conditions of the system in order to cope with maintaining the accuracy at both the heat medium flow rate and the heating set value.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a heat utilization apparatus according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a circulation pump in the apparatus.

FIG. 3 is a system configuration diagram of a heat utilization apparatus according to a second embodiment of the present invention.

FIG. 4 is a system configuration diagram of a heat utilization device according to a third embodiment of the present invention.

FIG. 5 is a characteristic diagram of a circulation pump in the apparatus.

FIG. 6 is a system configuration diagram of a heat utilization device according to a fourth embodiment of the present invention.

FIG. 7 is a system configuration diagram of a heat utilization device according to a fifth embodiment of the present invention.

FIG. 8 is a system configuration diagram of a heat utilization device according to a sixth embodiment of the present invention.

FIG. 9 is a system configuration diagram of a heat utilization device according to a seventh embodiment of the present invention.

FIG. 10 is a system configuration diagram of a conventional water heater.

FIG. 11 is a configuration diagram of a conventional hot water supply system of a hot water supply device.

[Explanation of symbols]

 2 Heat medium outlet pipe 3 Heat medium return pipe 21 Heat medium introduction passage 22 Heat exchange part 23 Heat medium outflow passage 24 Heat medium circulation path 25 Flow path switching part 26 Heat medium drive part 27 Flow distribution part 28 Heat medium drive flow path 29 Circulation pump 30 Pump unit 31, 31 'Hot water mixer tap 32 Hot water supply pipe 34 Hot water supply return pipe 35 Hot water circulation path 56 Temperature detection unit 58 Flow distribution control unit 59 Heat quantity measurement unit 65 Drive flow control unit 66 Drive flow control unit 67 Heat Medium control unit 73, 78 Heating flow control unit 75 Heat medium control device 80 Heat medium flow control device

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24D 17/00

Claims (7)

(57) [Claims] 1. A heat medium circulation path in which a heat medium introduction passage communicating with a heat medium inflow pipe, a heat exchange section and a heat medium outflow passage communicating with a heat medium return pipe are sequentially connected, and the heat medium introduction passage is provided in the heat medium introduction passage. A heat medium drive flow path in which a flow path switching unit provided, a heat medium drive unit of a circulation pump using the heat medium as a drive source, and a flow distribution unit are sequentially connected is arranged in parallel with the heat exchange unit, and an outlet of the flow distribution unit A heat utilization device having one end connected to the heat medium outlet passage and the other end on the outlet side of the flow distribution unit connected to a heat medium introduction passage between the flow path switching unit and the heat exchange unit. 2. A flow distribution control device for controlling a flow rate of a heat medium flowing to a heat exchange unit in a flow distribution unit according to a temperature detected by a temperature detection unit provided on an outlet side of a secondary flow path of the heat exchange unit. The heat utilization device according to claim 1. 3. A drive flow control unit for varying the flow rate of the heat medium to the heat medium drive unit, a heat amount measurement unit provided in the heat medium circulation path, and the drive flow control unit is controlled by a detection signal of the heat amount measurement unit. The heat utilization device according to claim 1, further comprising a drive flow control device. 4. A heat flow control section for varying the flow rate of the heat medium to the heat medium drive section, and a heat control section for controlling the drive flow rate control section and the flow rate distribution section based on a detection signal of a heat quantity measurement section provided in the heat medium circulation path. The heat utilization device according to claim 1, further comprising a medium control device. 5. A flow distribution control device for controlling a flow rate of a heat medium flowing to a heat exchange unit in a flow distribution unit according to a temperature detected by a temperature detection unit provided on a secondary flow path outlet side of a heat exchange unit; 2. A drive flow control unit for varying a flow rate of the heat medium to the medium drive unit, and a drive flow control device for controlling the drive flow control unit based on a detection signal of a calorie measurement unit provided in the heat medium circulation path. Heat utilization equipment. 6. A heat medium circulation path in which a heat medium introduction passage communicating with the heat medium supply pipe, a heat exchange section and a heat medium outflow path communicated with the heat medium return pipe are sequentially connected, and circulation using the heat medium as a drive source. A heat medium drive flow path having a heat medium drive section of a pump, a heating flow rate control section for varying a flow rate of the heat medium to the heat exchange section, and a temperature provided on an outlet side of a secondary flow path of the heat exchange section. A detecting unit, having a calorie measuring unit provided in the heat medium circulating path, wherein a temperature difference between a heat medium inlet and an outlet of the calorific value measuring unit when the heat medium flows to the heat medium driving unit is equal to or less than a predetermined value. A heat utilization device provided with a heat medium control device that controls the heating flow rate control unit by increasing a set value of the temperature detection unit when the temperature becomes low. 7. A heat medium circulation path in which a heat medium introduction passage communicating with the heat medium supply pipe, a heat exchange section and a heat medium outflow passage communicated with the heat medium return pipe are sequentially connected, and circulation using the heat medium as a drive source. A heat medium drive channel having a heat medium drive section of a pump; a drive flow rate control section for varying a heat medium flow rate to the heat medium drive section; and a heating flow rate control section for varying a heat medium flow rate to the heat exchange section. A heat detecting unit provided on the outlet side of the secondary flow path of the heat exchange unit, and a calorific value measuring unit provided on the heat medium circulating path, wherein the heat amount is supplied when the heat medium flows to the heat medium driving unit. A heat utilization device provided with a heat medium flow control device that increases a heat medium flow rate to a heat medium drive unit and increases a set value of a temperature detection unit when a temperature difference between a heat medium inlet and an outlet of a measurement unit becomes equal to or less than a predetermined value. .