JP2013117347A - Hot water storage type heat source machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage type heat source machine that can maintain temperature stratification in a hot water storage facility while maintaining a relatively simple configuration.SOLUTION: A hot water storage facility includes: first and second hot water storing units V1 and V2 for storing hot water; a high temperature hot water storing unit V3 connected with the first and second hot water storing units V1 and V2 at an upper side thereof and capable of storing high temperature hot water where a first hot water circulation channel R1 is arranged so that the hot water has flowed from a lower portion of the first hot water storing unit V1 returns to the hot water storing facility via the high temperature hot water storing unit V3, and a second hot water circulation channel R2 is arranged so that the hot water sent from the high temperature hot water storing unit V3 returns to the second water storing unit V2 via a lower portion of the hot water storing unit V2.

Description

  The present invention includes a first hot water circulation path that circulates hot water stored in a hot water storage facility in a state in which heat of the heat source unit can be recovered and returns the hot water to the hot water storage facility, and consumes hot water stored in the hot water storage facility as heat. The present invention relates to a hot water storage type heat source device including a second hot water circulation path that circulates heat to a terminal in a state where heat can be freely supplied and returns the heat to the hot water storage facility.

2. Description of the Related Art In recent years, a hot water storage tank for storing hot water heated and heated by using heat generated by a gas engine or solar heat collected by a solar panel as a heat source is provided, and hot water stored in the hot water tank is supplied with water or heated. 2. Description of the Related Art A hot water storage type heat source device that is configured to be supplied as a heat consuming terminal such as a device is known. In the hot water storage tank of the hot water storage heat source machine, the upper part of the hot water storage tank is used to increase the heat recovery efficiency by heat exchange from heat sources such as gas engines and solar panels, or to supply hot water to heat-consuming terminals that require high temperatures. Hot water is stored in a temperature stratified state where the temperature is high and the bottom is low.
Here, in the hot water storage tank of a general hot water storage type heat source machine, the hot water at the top of the hot water storage tank is led to the heat consuming terminal, and the heat consuming terminal dissipates heat by heat exchange with the heat medium, resulting in a low temperature. The low-temperature hot water is configured to be guided to the lower part of the hot water storage tank.
In such a configuration, when the heating load in the heat consuming terminal is small, the heat dissipation amount of the hot water in the heat consuming terminal is small, and the hot water is led to the lower part of the hot water tank in a relatively high temperature state. The temperature stratification in the tank may collapse.
Therefore, even in the above case, it is possible to maintain the temperature stratification of the hot water tank. Among hot waters having a plurality of branch inflow portions in a state along the vertical direction of the hot water tank and circulating through the heat consuming terminal, There is a hot water storage type heat source machine configured to flow from the upper branch inflow part (see Patent Document 1).
Moreover, the 1st flow path which guides the hot water after flowing through a heat consumption terminal to the upper side of a hot water tank, the 2nd flow path which guides to the lower side of a hot water tank, and the hot water after flowing through a heat consumption terminal Among them, there is a hot water storage type heat source device including switching means for guiding hot water with low temperature to the first flow path and guiding hot water with high temperature to the second flow path, and control means for controlling switching by the switching means ( (See Patent Document 2).
In addition, as other hot water storage type heat source machines, the temperature of the hot water when returning the hot water circulating through the heat consuming terminals to the hot water tank, and the temperature of the hot water tank, along the vertical direction of the hot water tank There are known temperature sensors that measure the distribution state, and configured to return hot water to the hot water tank based on the measurement results of these temperature sensors (see Patent Document 3).

JP 2001-304688 A JP 2003-121001 A JP 2007-271163 A

  However, in the prior art, when maintaining temperature stratification in a hot water tank, as disclosed in Patent Documents 1 to 3, it is necessary to employ a relatively complicated flow path configuration. In some cases, as disclosed in Patent Documents 2 and 3, as a configuration for switching the state of hot water flowing through a complicated flow path, a switching unit, a temperature sensor, a control unit, and the like are also required. Was more complicated.

  This invention is made | formed in view of the above-mentioned subject, The objective is to provide the hot water storage type heat source machine which can maintain the temperature stratification in a hot water storage equipment, maintaining a comparatively simple structure. .

To achieve the above object, the hot water storage type heat source machine of the present invention is
A first hot water circulation path is provided that circulates hot water stored in the hot water storage facility in a state in which the heat of the heat source unit can be recovered and returned to the hot water storage facility, and the hot water stored in the hot water storage facility is heated to the heat consuming terminal. A hot water storage type heat source machine having a second hot water circulation path that circulates in a freely available state and returns to the hot water storage facility,
The hot water storage facility has a first hot water storage portion and a second hot water storage portion for storing the hot water, and communicates the first hot water storage portion and the second hot water storage portion on the upper side thereof to store hot hot water. With possible hot and cold water storage,
The first hot water circulation path is disposed so as to return the hot water sent from the lower part of the first hot water storage part to the high temperature hot water hot water storage part;
The second hot water circulation path is arranged to return the hot water sent from the high temperature hot water hot water storage section to the second hot water storage section via a lower portion of the second hot water storage section.

According to the above characteristic configuration, the hot water supplying heat to the heat consuming terminal is circulated through the second hot water circulation path and stored in the second hot water storage section, and the hot water recovered from the heat source device is the first hot water. The hot water is circulated through the circulation path and stored in the first hot water storage section.
Thus, even when the heat demand at the heat consuming terminal is small and the temperature of the hot water flowing back through the heat consuming terminal in the second hot water circulation path is relatively high, Since it flows into 2 hot water storage parts, it can prevent that hot hot water flows into a 1st hot water storage part, and can maintain a stratified hot water in a 1st hot water storage part.
As a result, according to the present invention, as in the prior art, it is relatively simple to provide the first hot water storage section and the second hot water storage section without providing a complicated piping configuration, switching means, temperature sensor, control means and the like. With the configuration, it is possible to realize a hot water storage type heat source machine that can maintain a stratified hot water in a hot water storage facility.

Further features of the hot water storage type heat source machine of the present invention are as follows:
The hot water storage facility consists of a single hot water tank,
A partition that extends upward from the lower end of the internal space of the single hot water tank and separates the lower side of the internal space into one side portion and the other side portion,
The one side portion is configured as the first hot water storage portion, and the other side portion is configured as the second hot water storage portion,
The upper portion of the single hot water storage tank on the upper side of the internal space is the high temperature hot water hot water storage section.

According to the above characteristic configuration, the first hot water storage unit and the second hot water storage unit are provided on the lower side of the internal space by the simple configuration of including the partition wall extending upward from the lower side portion of the internal space of the single hot water tank. Can be realized. For example, the material of the said partition is made into the partition with low heat conductivity, and can suppress the heat conduction between the hot water stored in a 1st hot water storage part, and the hot water stored in a 2nd hot water storage part. As a result, even if relatively hot water flows into the lower side of the second hot water storage section and the second hot water storage section becomes hot, conduction of the heat to the first hot water storage section can be suppressed, and the first hot water storage section Can maintain stratified hot water.
Moreover, since the high temperature hot water hot water storage part is provided in the upper side part of the internal space of a single hot water tank, the hot water stored in both the first hot water storage part and the second hot water storage part, It can lead to the high temperature hot water hot water storage part. As a result, hot water from both the first hot water storage unit and the second hot water storage unit is guided from the high temperature hot water hot water storage unit to the heat consuming terminal.
As described above, the first hot water storage unit, the second hot water storage unit, and the high-temperature hot water hot water storage are provided in the single hot water storage tank by a relatively simple configuration in which one partition wall is provided inside the single hot water storage tank. All of the parts can be provided, and the configuration can be simplified.

Further features of the hot water storage type heat source machine of the present invention are as follows:
The hot water storage facility consists of a single hot water tank,
A partition that extends in the vertical direction from the lower end to the upper end of the internal space of the single hot water tank, and separates the internal space into one side portion and the other side portion,
The one side portion is the first hot water storage portion, and the other side portion is the second hot water storage portion.
In the above-described characteristic configuration, the high-temperature hot water storage hot water storage section can be configured, for example, as a connection channel that connects the first hot water storage section and the second hot water storage section outside the hot water storage tank.

  According to the above characteristic configuration, the first hot water storage section and the second hot water storage section can be realized by a relatively simple configuration in which a partition wall is provided in the internal space of a single hot water storage tank. For example, the material of the said partition is made into the partition with low heat conductivity, and can suppress the heat conduction between the hot water stored in a 1st hot water storage part, and the hot water stored in a 2nd hot water storage part. As a result, even if relatively hot water flows into the lower side of the second hot water storage section and the second hot water storage section becomes hot, conduction of the heat to the first hot water storage section can be suppressed, and the first hot water storage section Can maintain stratified hot water.

  As described above, the invention according to the present application can maintain a stratified hot water while maintaining a relatively simple configuration. Below, the structure which can improve thermal efficiency further in the state which maintains the stratified hot water in this way is demonstrated.

Further features of the hot water storage type heat source machine of the present invention are as follows:
In the second hot water circulation path, a first recirculation state in which hot water after flowing through the heat consuming terminal is returned to a lower part of the first hot water storage part and a second return state to the lower part of the second hot water storage part is provided. A switching means for switching between the two reflux states is provided, and a first hot water temperature measuring means for measuring the temperature of the hot water after flowing through the heat consuming terminal is provided,
When the hot water temperature measured by the first hot water temperature measuring means is equal to or higher than the first stratified hot water storage threshold, the switching means switches to the second reflux state, and when the hot water temperature is lower than the first stratified hot water storage threshold, the switching is performed. The means is provided with control means for performing switching control to the first reflux state.

According to the above characteristic configuration, when the hot water after circulating through the second hot water circulation path and flowing through the heat consuming terminal is equal to or higher than the first stratified hot water storage threshold (for example, 30 ° C.), that is, the hot water is relatively hot. In this case, as the second reflux state, the high-temperature hot water is guided to the second hot water storage section, and the stratified hot water storage in the first hot water storage section is maintained.
On the other hand, when the hot water after circulating through the second hot water circulation path and flowing through the heat consuming terminal is less than the first stratified hot water storage threshold, that is, when the hot water is relatively low temperature, the low temperature is set as the first reflux state. The hot water is guided to the first hot water storage section. Even in this case, since the hot water introduced is relatively low in temperature, the stratified hot water can be maintained in the first hot water storage section.

Further features of the hot water storage type heat source machine of the present invention are as follows:
A second hot water temperature measuring means for measuring the temperature of the hot water in the hot water storage hot water storage section of the hot water storage facility is provided;
The switching means has the first reflux state, the second reflux state, and the hot water after flowing through the heat consuming terminal, a lower part of the first hot water storage part and a lower part of the second hot water storage part. It is configured to be able to switch between the third reflux state to be returned to both,
The control means is configured such that the hot water temperature measured by the first hot water temperature measuring means is less than the first stratified hot water storage threshold, and the hot water temperature measured by the second hot water temperature measuring means is the second stratified hot water temperature. If it is less than the threshold, the switching means is controlled to the third reflux state.

From the viewpoint of heat recovery, the hot water storage tank is preferably stratified hot water in the entire hot water stored therein, that is, in both the first hot water storage section and the second hot water storage section.
However, as shown in the above characteristic configuration, when the hot water temperature measured by the first hot water temperature measuring means continues to be lower than the first stratified hot water storage threshold, that is, the hot water circulating through the second hot water circulation path is In the case where the state of sufficiently supplying heat to the heat consuming terminal and refluxing at a relatively low temperature continues, the switching means switches to the first circulation state, and the relatively low temperature hot water continues to be stored in the first hot water storage section. When it is, only the lower side of the 1st hot water storage part may become comparatively low temperature, and the lower side of the 2nd hot water storage tank may be in the state which is not so low temperature.
Here, whether or not it is in this state is a case where heat is continuously consumed in the heat consuming terminal, so that the temperature on the upper side of the hot water tank is relatively low, Whether or not it is in a state can be determined.
Therefore, in the above characteristic configuration, when the hot water returned from the second hot water circulation path is at a relatively low temperature (less than the first stratification threshold), the temperature of the hot water in the hot hot water storage section of the hot water storage facility, that is, hot water storage When the temperature of the hot water stored in the upper part of the tank is relatively low (less than the second stratified hot water threshold of about 50 ° C.), the lower part of the first hot water storage part is set as the third reflux state. And low temperature hot water are supplied to both of the lower side portions of the second hot water storage section to promote stratification of both the first hot water storage section and the second hot water storage section. Thereby, the whole hot water storage tank can be brought close to the state of the stratified hot water.

Further features of the hot water storage type heat source machine of the present invention are as follows:
The first hot water circulation path is configured to circulate hot water sent from the lower side of the second hot water storage section.

  According to the above characteristic configuration, the first hot water circulation path is configured to be able to circulate hot water sent from the lower side of the second hot water storage section. For example, the temperature of the lower part of the second hot water storage section is relatively low. When the temperature is low, the hot water taken out from both the first hot water storage section and the second hot water storage section is guided to the first hot water circulation path, and the heat of the heat source machine can be recovered well.

It is a hot water storage type heat source machine in which the 1st hot water storage part and the 2nd hot water storage part are connected inside the hot water storage tank, and is a schematic structure figure showing the 2nd recirculation state. It is a hot water storage type heat source machine with which the 1st hot water storage part and the 2nd hot water storage part are connected inside the hot water storage tank, and it is a schematic structure figure showing the 1st recirculation state. It is a figure which shows another embodiment of the hot water storage tank in case the 1st hot water storage part and the 2nd hot water storage part are communicating outside the hot water storage tank. It is a figure which shows another embodiment of the hot water storage tank in case the 1st hot water storage part and the 2nd hot water storage part are communicating outside the hot water storage tank. It is a figure which shows another embodiment of a partition. It is a figure which shows another embodiment of a partition.

  The hot water storage type heat source device 100 of the present invention can maintain temperature stratification in a hot water storage facility for storing hot water while maintaining a relatively simple configuration. Hereinafter, the configuration will be described with reference to the drawings.

  As shown in FIG. 1, the hot water storage type heat source device 100 of the present invention generates hot water stored in a single hot water storage tank 10 (an example of hot water storage facility) and generates heat generated by an engine 20 (an example of a heat source device). A first hot water circulation path R1 that circulates in a recoverable state and returns to the hot water storage tank 10 is provided, and hot water stored in the hot water storage tank 10 is circulated in a state in which heat can be supplied to the heat consuming terminal 31 in a hot water storage tank. A second hot water circulation path R2 that returns to 10 is provided.

[Configuration related to the first hot water circulation path]
The first hot water circulation path R1 collects heat generated in the engine 20, but first, a configuration related to the generation of heat in the engine 20 will be described in order to explain the configuration.
The engine 20 is provided with a jacket water circulation path R3 that circulates jacket water that cools the cylinder head 21 and the like, and a second pump 24 that pumps jacket water through the jacket water circulation path R3. The jacket water circulation path R3 is disposed in a state in which jacket water flows through the cylinder head 21 of the engine 20 and the exhaust gas heat exchanger 23 provided in the exhaust gas path 22 of the engine 20 in the order described.

  The engine 20 is configured to drive a power generation device 25, and an inverter 26 for grid connection is provided on the output side of the power generation device 25. The inverter 26 uses the output power of the power generation device 25 for commercial use. The electric power supplied from the electric power system 27 is configured to be converted into the same voltage and the same frequency. The commercial power system 27 is, for example, a single-phase three-wire system 100/200 V, and is electrically connected to a power consumption terminal 29 such as a television, a refrigerator, a washing machine, etc. via a commercial power supply line 28.

The power supplied to the commercial power supply line 28 is controlled so that the generated power generated by the power generation device 25 does not reversely flow by the inverter 26, and the surplus power of the generated power Instead of this, it is configured to be supplied to the electric heater 14 to be recovered.
The electric heater 14 includes a plurality of electric heaters, and is provided so as to be able to heat the jacket water circulating through the jacket water circulation path R3.
That is, the jacket water flowing through the jacket water circulation path R <b> 3 can recover heat by the cylinder head 21, the exhaust gas heat exchanger 23, and the electric heater 14 of the engine 20.

The first hot water circulation path R1 is provided with a first pump 11 that pumps hot water into the first hot water circulation path R1 and is heated by the cylinder head 21, the exhaust gas heat exchanger 23, and the electric heater 14 of the engine 20. A first heat exchanger 12 is provided for exchanging heat between the jacket water from which the water has been collected and the hot water flowing through the first hot water circulation path R1.
That is, the first hot water circulation path R1 is configured to recover the heat of the jacket water by the first heat exchanger 12 with the hot water to be circulated, recover the heat generated in the engine 20, and store the hot water recovered from the heat as hot water. It is provided to store hot water in the tank 10.
The first hot water circulation path R1 is configured such that when hot water in the hot water storage tank 10 is used for hot water supply or the like, water supply corresponding to the used hot water can be replenished at any time.

[Configuration related to the second hot water circulation path]
The second hot water circulation path R2 is configured to be able to supply heat to the heat consuming terminals 31 such as a floor heating device and a bathroom heating device using hot water stored in the hot water storage tank 10, and a part of the circulating hot water. Can be supplied for hot water supply.
When the description is added, the second hot water circulation path R2 includes a third pump 33 that pumps hot water into the second hot water circulation path R2, an auxiliary heat source device 30 that heats the hot water and the heat consumption terminal 31, and a heat medium. The second heat exchanger 32 that exchanges heat between the heat medium in the heat medium circulation path R4 that circulates and the hot water is provided in the order of description in the circulation direction of the hot water. That is, the hot water circulating through the second hot water circulation path R <b> 2 supplies heat to the heat consuming terminal 31 in a form in which heat is supplied to the heat medium by the second heat exchanger 32.
The hot water supplied for hot water supply can be heated by the auxiliary heat source unit 30 and can be mixed with hot water at a relatively low temperature from the outside, and adjusted to the required temperature. , To be supplied.

  As described above, the hot water circulated through the second hot water circulation path R2 has a relatively high temperature even after heat exchange with the heat medium in the second heat exchanger 32 when the amount of heat consumed in the heat consuming terminal 31 is small. When the hot water is returned to the hot water tank 10 as described above, the temperature stratification of the hot water tank 10 is broken. In order to avoid such a situation, in the present invention, the hot water tank 10 is configured as follows.

[Configuration related to hot water storage tanks]
In the present embodiment, the hot water storage facility is configured by a single hot water storage tank 10.
The single hot water tank 10 extends upward from the lower end portion of the internal space V, and the lower side of the internal space V is laterally (ie, horizontal), one side portion and the other side portion. The separating partition 10a is provided, and the one side portion functions as the first hot water storage portion V1, and the other side portion functions as the second hot water storage portion V2.

The partition wall 10a can be integrally formed with the outer wall 10b of the hot water tank 10 using a technique such as blow molding. By constituting the material of the partition wall 10a with a material having relatively low thermal conductivity, heat conduction between the first hot water storage portion V1 and the second hot water storage portion V2 is suppressed.
In addition, the upper end of the partition wall 10a extends to a substantially central portion in the vertical direction of the hot water storage tank 10, and the first hot water storage part V1 and the second hot water storage part V2 communicate with each other above the upper end. That is, the upper part of the internal space V of the hot water tank 10 is configured as a high temperature hot water hot water storage part V3.
As described above, by providing the partition wall 10a in the hot water storage tank 10, the first hot water storage part V1, the second hot water storage part V2, and the high temperature hot water hot water storage part V3 are provided in the internal space V of the single hot water storage tank 10. The configuration is simplified.

And 1st hot water circulation path R1 is provided so that the hot water sent from the downward part of 1st hot water storage part V1 can be returned to high temperature hot water hot water storage part V3, and 2nd hot water circulation path R2 is high temperature. The hot water sent from the hot water storage part V3 is provided so as to return to the lower part of the second hot water storage part V2.
As a result, even when the relatively hot water is returned in the second hot water circulation path R2, the hot water is stored in the second hot water storage part V2, so that temperature stratification in the first hot water storage part V1 is achieved. Maintained.

  As can be seen from FIG. 1 and the like, the return portion of the first hot water circulation path R1 to the high temperature hot water storage section V3 and the delivery section from the high temperature hot water storage section V3 of the second hot water circulation path R2 have a common flow. It is a road.

  The above is the configuration of the hot water storage type heat source device 100 for maintaining temperature stratification. Hereinafter, the configuration for further improving the heat storage efficiency will be described with reference to FIGS. 1 and 2.

The hot water circulating in the second hot water circulation path R2 is stored in the hot water temperature when returning to the second hot water storage section V2 through the second hot water circulation path R2 and in the high temperature hot water hot water storage section V3 of the hot water storage tank 10. Depending on the temperature of the hot water, the first hot water storage section V1 can be returned.
In other words, in the second hot water circulation path R2, a first temperature sensor S1 (first hot water temperature measurement) that measures the temperature of hot water when returning to the second hot water storage section V2 through the second hot water circulation path R2. And a second temperature sensor S2 (an example of a second hot water temperature measuring means) that measures the temperature of the hot water stored in the high temperature hot water storage section V3 of the hot water storage tank 10. And the control apparatus 40 (an example of a control means) which acquires those measurement results regularly is provided.

Further, the second hot water circulation path R2 includes a second reflux state (state shown in FIG. 1) in which the return destination of the hot water flowing through the second heat exchanger 32 is the second hot water storage section V2, and a communication channel. A three-way valve 34 (an example of a switching unit) that switches between a first recirculation state (the state shown in FIG. 2) that is the first hot water storage portion V1 via R5 is provided.
In addition, the communication flow path R5 is located downstream of the second heat exchanger 32 in the second hot water circulation path R2 and upstream of the second hot water storage section V2, and between the first hot water storage section V1 of the first hot water circulation path R1. A downstream side is provided so as to communicate with an upstream side portion of the first heat exchanger 12.

When the temperature measured by the first temperature sensor S1 is equal to or higher than the first stratified hot water storage threshold (for example, 30 ° C.), the control device 40 determines the temperature of the hot water returned in the second hot water circulation path R2. When the temperature is relatively high, the three-way valve 34 is switched so as to be in the second reflux state. In the second recirculation state, the relatively hot water is led to the second hot water storage section V2, thereby preventing the relatively hot water from being guided to the first hot water storage section V1, and the first hot water storage section. Temperature stratification is maintained at V1.
On the other hand, when the temperature measured by the first temperature sensor S1 is less than the first stratified hot water storage threshold, that is, the temperature of the hot water returned by the second hot water circulation path R2 is relatively low. In some cases, the three-way valve 34 is switched so as to be in the first reflux state. In the first recirculation state, the hot water from the second hot water circulation path R2 is returned to the first hot water storage portion V1, but the temperature of the hot water is relatively low. V1 temperature stratification is maintained.

  In addition, even if the hot water storage apparatus demonstrated so far is a different body from the hot water storage type heat source apparatus 100 of this invention, it functions effectively by itself.

[Another embodiment]
(1) From the viewpoint of heat recovery, the hot water storage tank 10 is maintained in temperature stratification in the entire hot water stored therein, that is, in both the first hot water storage portion V1 and the second hot water storage portion V2. Is preferred.
Here, as in the above embodiment, when the hot water circulating through the second hot water circulation path R2 is returned at a relatively low temperature, the first circulating state (state shown in FIG. 2) for guiding the hot water to the first hot water storage section V1; In such a configuration, when the first circulation state continues for a long time, the lower side of the first hot water storage section V1 may be at a low temperature, and the lower side of the second hot water storage section V2 may not be at a low temperature. The stratification may not be maintained.
Whether this state is present or not is the case where heat is continuously consumed by the heat consuming terminal 31, and therefore the temperature above the hot water tank 10 (the temperature of the high temperature hot water hot water storage section V3) is relatively low. Therefore, it can be determined whether or not it is in that state.
Therefore, even when the temperature of the hot water returned in the second hot water circulation path R2 is relatively low, if the temperature of the upper part of the hot water tank 10 is relatively low, the low temperature hot water is used as the first hot water storage. It leads to both the part V1 and the 2nd hot water storage part V2, and aims at the stratification of the hot water storage tank 10 whole.
Specifically, in the embodiment, the three-way valve 34 (an example of the switching unit) includes a first reflux state (state shown in FIG. 2), a second reflux state (state shown in FIG. 1), And the 3rd recirculation state which returns hot water after flowing through heat consumption terminal 31 to both the lower part of the 1st hot water storage part V1 and the lower part of the 2nd hot water storage part V2 is constituted so that switching is possible. And the 2nd temperature sensor S2 (an example of a 2nd hot-water temperature measurement means) which measures the temperature of the high temperature hot-water storage part V3 is provided.
Even when the temperature measured by the first temperature sensor S1 is less than the first stratified hot water storage threshold (for example, 30 ° C.), the temperature measured by the second temperature sensor S2 is When the temperature is lower than the two-stratified hot water storage threshold (for example, 50 ° C.), the three-way valve 34 is controlled so as to be in the third reflux state.

(2) The partition wall 10a, as shown in FIG. 3, separates not only the lower side of the internal space V of the single hot water tank 10 but also the entire internal space V into one side portion and the other side portion, One side may be disposed as the first hot water storage section V1, and the other side may be disposed as the second hot water storage section V2.
In this case, the high-temperature hot-water storage part V3 can be constituted by a connection channel 50 that connects the first hot-water storage part V1 and the second hot-water storage part V2 outside the hot-water storage tank 10.

(3) As shown in FIG. 4, the hot water storage facility has a first hot water storage tank 51 in which the entire internal space V is the first hot water storage section V1, and a second hot water storage section V2 in which all of the internal space V is the second hot water storage section V2. Two hot water storage tanks 52 may be used.
In this case, the high-temperature hot water storage section V3 is configured by a connection channel 50 that connects the first hot water storage tank 51 and the second hot water storage tank 52 outside the first hot water storage tank 51 and the second hot water storage tank 52. Can do.

(4) In the above-described embodiment, the partition wall 10a has been described as extending from the lower end to the substantially central portion in the vertical direction of the hot water tank 10. However, the partition wall 10a suppresses heat exchange between the one side portion and the other side portion on the lower side of the hot water tank 10, and at the upper side portion thereof exhibits a function of allowing heat transfer. As long as it is provided in, it may be arranged in any way.
For example, as shown in FIG. 5, the partition wall 10 a extends to the upper side in the vertical direction of the hot water tank 10, and is arranged so that the portion excluding the upper end side end portion is separated into one side portion and the other side portion. You may set up.
Moreover, as shown in FIG. 6, the partition wall 10 a is arranged from the lower end to the upper end in the vertical direction of the hot water tank 10, and a large number (or singular number) is provided in the upper portion. The opening 53 may be provided.

(5) About the volume of the 1st hot water storage part V1 and the 2nd hot water storage part V2, it shall be able to set suitably according to the utilization condition etc. of the heat consumption terminal 31 of each spot.
Specifically, among the hot water returned from the heat consuming terminal 31, the volume of the second hot water storage section V2 is increased as the proportion of hot water having a relatively high temperature (for example, a temperature higher than 30 ° C.) is increased. It can set so that the volume of the hot water storage part V1 may be made small.

(6) In the above embodiment, the hot water led to the first hot water circulation path R1 is configured to be sent from the first hot water storage section V1. However, when predetermined conditions are satisfied, the hot water of the second hot water storage section V2 may be supplied together with the hot water of the first hot water storage section V1.
If a description is added, when the temperature of the hot water of the lower side of the 2nd hot water storage part V2 is low, even if it circulates the hot water stored in the said 2nd hot water storage part V2 to the 1st hot water circulation path R1, it is jacket water. Therefore, the jacket water can be recovered well.
Accordingly, the third temperature sensor S3 that measures the temperature on the lower side of the second hot water storage section V2 is provided, and the control device 40 is configured so that when the temperature of the third temperature sensor S3 is lower than a predetermined temperature (for example, 30 ° C.) You may comprise so that the hot water stored in the 2 hot water storage part V2 may control the opening state of the three-way valve 34 so that the hot water stored in the 2 hot water storage part V2 may be guide | induced to 1st hot water circulation path R1 via the communication flow path R5.
Thereby, hot water can be supplied to 1st hot water circulation path R1 from both the 1st hot water storage part V1 and the 2nd hot water storage part V2.

(7) In the above embodiment, the engine 20 has been described as an example of the heat source device. However, the heat source device may be any device that generates heat and can use the heat as a heat source. For example, a fuel cell, a solar panel, etc. can be used suitably.

  While maintaining the relatively simple configuration of the present invention, it can be effectively used as a hot water storage type heat source machine capable of maintaining temperature stratification in the hot water storage facility.

10: Hot water tank 10a: Bulkhead 20: Engine (an example of a heat source machine)
31: Heat consumption terminal 34: Three-way valve (an example of switching means)
40: Control device 50: Connection channel 51: First hot water tank 52: Second hot water tank 100: Hot water storage type heat source machine R1: First hot water circuit R2: Second hot water circuit R5: Communication channel S1: First Temperature sensor S2: 2nd temperature sensor S3: 3rd temperature sensor V: Internal space V1: 1st hot water storage part V2: 2nd hot water storage part V3: High temperature hot water storage hot water part

Claims (6)

A first hot water circulation path is provided that circulates hot water stored in the hot water storage facility in a state in which the heat of the heat source unit can be recovered and returned to the hot water storage facility, and the hot water stored in the hot water storage facility is heated to the heat consuming terminal. In a hot water storage type heat source machine provided with a second hot water circulation path that circulates in a freely available state and returns to the hot water storage facility,
The hot water storage facility has a first hot water storage portion and a second hot water storage portion for storing the hot water, and communicates the first hot water storage portion and the second hot water storage portion on the upper side thereof to store hot hot water. With possible hot and cold water storage,
The first hot water circulation path is disposed so as to return the hot water sent from the lower part of the first hot water storage part to the high temperature hot water hot water storage part;
A hot water storage type heat source device in which the second hot water circulation path is arranged to return the hot water sent from the high temperature hot water hot water storage part to the second hot water storage part via a lower part of the second hot water storage part. . The hot water storage facility consists of a single hot water tank,
A partition that extends upward from the lower end of the internal space of the single hot water tank and separates the lower side of the internal space into one side portion and the other side portion,
The one side portion is configured as the first hot water storage portion, and the other side portion is configured as the second hot water storage portion,
The hot water storage type heat source device according to claim 1, wherein an upper side portion of the single hot water storage tank on the upper side of the internal space is the high temperature hot water storage hot water storage section. The hot water storage facility consists of a single hot water tank,
A partition that extends in the vertical direction from the lower end to the upper end of the internal space of the single hot water tank, and separates the internal space into one side portion and the other side portion,
2. The hot water storage type heat source device according to claim 1, wherein the one side portion is the first hot water storage portion, and the other side portion is the second hot water storage portion. In the second hot water circulation path, a first recirculation state in which hot water after flowing through the heat consuming terminal is returned to a lower part of the first hot water storage part and a second return state to the lower part of the second hot water storage part is provided. A switching means for switching between the two reflux states is provided, and a first hot water temperature measuring means for measuring the temperature of the hot water after flowing through the heat consuming terminal is provided,
When the hot water temperature measured by the first hot water temperature measuring means is equal to or higher than the first stratified hot water storage threshold, the switching means switches to the second reflux state, and when the hot water temperature is lower than the first stratified hot water storage threshold, the switching is performed. The hot water storage type heat source machine according to any one of claims 1 to 3, further comprising control means for performing switching control to the first reflux state by means. A second hot water temperature measuring means for measuring the temperature of the hot water in the hot water storage hot water storage section of the hot water storage facility is provided;
The switching means has the first reflux state, the second reflux state, and the hot water after flowing through the heat consuming terminal, a lower part of the first hot water storage part and a lower part of the second hot water storage part. It is configured to be able to switch between the third reflux state to be returned to both,
The control means is configured such that the hot water temperature measured by the first hot water temperature measuring means is less than the first stratified hot water storage threshold, and the hot water temperature measured by the second hot water temperature measuring means is the second stratified hot water temperature. The hot water storage type heat source device according to claim 4, wherein the switching unit is controlled to the third reflux state when the value is less than the threshold value.   The hot water storage-type heat source device according to any one of claims 1 to 5, wherein the first hot water circulation path is configured to be able to circulate hot water sent from a lower side of the second hot water storage section.

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