JP2000274703A - Heat source unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain further simplification of the structure of the apparatus and higher versatility of the apparatus while accurately preventing a failure of an excessive rise in the radiation temperature of a low temperature radiator in a parallel connection of the low temperature radiator and a high temperature radiator. SOLUTION: A setting means 44 is provided to determine the connection state of radiators a low temperature radiator single connection in which a low temperature radiator 3 along is connected or a low/high radiator parallel connection in which the low temperature radiator 3 and a high temperature radiator 4 are connected in parallel. A switching means 45 is provided and according to the setting by the setting means 44, in the low temperature radiator single connection, the temperature ta of a feed heating medium Wa is shifted to a preset low temperature taL whole the supply flow rate of the heating medium for the low temperature radiator 3 is shifted to a preset large flow rate. On the other hand, in the low/high temperature radiator parallel connection, the supply flow rate of the heating medium for the low temperature radiator 3 is shifted to a preset small flow rate while the temperature ta of the feed heating medium Wa is shifted to a high temperature taH.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat source device for supplying a heat medium to be circulated to a radiator for heating or the like.

[0002]

Conventionally, in this type of heat source device, a low-temperature radiator and a high-temperature radiator are connected in parallel, whereas a low-temperature heat medium supplied to the low-temperature radiator and a high-temperature radiator supplied to the high-temperature radiator are connected. Enables simultaneous feeding with heat medium (that is, parallel simultaneous feeding of two-temperature heat medium), so that even in parallel operation of low-temperature radiator and high-temperature radiator, the radiation temperature of low-temperature radiator can be adjusted appropriately. In some cases, the heat radiation temperature of the low-temperature radiator is prevented from becoming excessively high by keeping the temperature at a low temperature.

[0003] Separately, a heat medium having the same temperature is distributed and supplied to a low-temperature radiator and a high-temperature radiator connected in parallel, and the high-temperature radiator is stopped and the low-temperature radiator is operated. In the low-temperature side alone operation, the temperature of the heat transfer medium is set to low temperature.On the other hand, in the high-temperature side alone operation in which the low-temperature radiator is stopped and the high-temperature radiator is operating, and both radiators operate. In the parallel operation in the state, the temperature of the heat transfer medium is set to a high temperature. On the other hand, for the low-temperature radiator, the flow rate of the heat medium supply to the low-temperature radiator is automatically determined based on the detection of the heat radiation temperature by the sensor. Controls to maintain the heat radiation temperature at the set temperature by adjusting, thereby preventing the heat radiation temperature of the low temperature heat radiator from becoming excessively high in the parallel operation of supplying the high temperature heat medium to both radiators. Some (for example, See JP -126,479).

[0004]

However, in the former conventional apparatus, the simultaneous generation of the low-temperature heating medium and the high-temperature heating medium is complicated, but the apparatus configuration is complicated and the apparatus cost is considerably high. is there.

On the other hand, in the latter conventional device, the low-temperature heat medium and the high-temperature heat medium are alternately fed, so that simultaneous generation of the low-temperature heat medium and the high-temperature heat medium is not required. In order to perform the heat medium flow control based on the detection, and to determine whether each of the low-temperature radiator and the high-temperature radiator is in the operating state, and to perform switching control for automatically switching the temperature of the transmission heat medium, The addition of the configuration necessary for performing these controls also causes a problem that the apparatus cost is high.

[0006] Further, in any conventional apparatus,
If the user does not need to connect a high-temperature radiator but only needs to connect a low-temperature radiator, the above-mentioned simultaneous generation function of the low-temperature heat medium and high-temperature heat medium and the operation state determination of the radiator The automatic switching function of the temperature of the heat medium based on the above-mentioned method becomes a completely excessive function, resulting in waste of cost. In this respect, there is a problem that versatility in various use forms is also lacking.

[0007] In view of this situation, the main problems of the present invention are:
Further simplification of the device configuration and improvement of the versatility of the device while reliably preventing the problem of excessively high heat radiation temperature of the low-temperature radiator in parallel connection of the low-temperature radiator and the high-temperature radiator The point is to make it possible.

[0008]

According to the first aspect of the present invention, in a heat source device for supplying a heat medium to be circulated to a radiator, a connection state of the radiator is a low temperature in which only a low temperature radiator is connected. Setting means for setting whether to connect the heater alone or to connect the low-temperature radiator in parallel with the high-temperature radiator in parallel. When the temperature is set to a preset low temperature, the heat medium supply flow rate to the low-temperature radiator is set to a preset large flow rate, and when the setting by this setting means is a parallel connection of the low- and high-temperature devices, Switching means is provided for setting the temperature of the medium to a preset high temperature and setting the flow rate of the heat medium supplied to the low-temperature radiator to a preset small flow rate.

In other words, according to this configuration, the low-temperature radiator alone is connected (including a case where a plurality of low-temperature radiators are connected in parallel), and a low-temperature heat medium is supplied. In the parallel connection of the radiator and the high-temperature radiator, the low-temperature radiator is connected in parallel. In both the connection mode of the single-unit connection and the parallel connection of the low-temperature and high-temperature units, the operation of the connected low-temperature radiator can surely prevent the heat radiation temperature from becoming excessively high. The heat radiation temperature of the radiator can always be kept at an appropriate temperature.

In the low-temperature and high-temperature radiator parallel connection in which the low-temperature radiator and the high-temperature radiator are connected in parallel, a high-temperature radiator can be secured at a high radiator temperature by supplying a high-temperature heat medium. With the operation of the connected high-temperature radiator,
The high-temperature heat dissipation function can always be fully utilized.

In addition to the above-described high function, the low-temperature heat medium and the high-temperature heat medium are alternately fed, and the temperature of the heat medium to be fed is adjusted according to the setting by the setting means. And, by switching the heating medium supply flow rate to the low-temperature radiator to a preset temperature and flow rate, since it corresponds to each of the low-temperature device alone connection and the low- and high-temperature device parallel connection,
Compared to the former conventional device described above, the simultaneous generation of the low-temperature heat medium and the high-temperature heat medium can be unnecessary, and based on the heat radiation temperature detection for the low-temperature radiator compared to the latter conventional device described above. The configuration of the apparatus can be greatly simplified as compared with these conventional apparatuses in that the heat medium flow rate control and the automatic switching control of the heat medium temperature based on the operation state determination of the radiator can be omitted.

That is, the simplification of the device configuration allows
In addition to greatly reducing equipment costs, it is possible to cope with a case where only a low-temperature radiator connection is required as a user's request without causing excessive useless excess functions. Heat source device.

[2] According to the second aspect of the invention, the first aspect
In order to carry out the invention according to the first aspect, the switching means is connected to the low-temperature radiator by changing the ratio of the heat medium supply time to the heat medium supply stop time in the intermittent supply of the heat medium to the low-temperature radiator. The configuration is such that the flow rate of the heat medium supplied to the low-temperature radiator at the time of (1) is switched to the flow rate of the heat medium supplied to the low-temperature radiator at the time of the parallel connection of the low-temperature and high-temperature devices.

That is, according to this configuration, the ratio of the heat medium supply stop time to the heat medium supply time is increased by limiting the heat medium supply flow rate to the low temperature radiator to a small flow rate in the low temperature and high temperature device parallel connection. Since the average flow rate of the heat medium supplied to the low-temperature radiator is reduced, the large instantaneous flow rate in the parallel connection of the low- and high-temperature apparatuses during the heat medium supply period is the same as that of the low-temperature apparatus alone.

[0015] Therefore, compared with the flow rate limiting mode in which the flow rate of the heat medium supplied to the low-temperature radiator is constantly reduced by the throttle, the low- and high-temperature radiator parallel that limits the heat medium supply rate to the low-temperature radiator to a small flow rate is adopted. In connection, the distribution of the heat medium to each part of the low-temperature radiator can be kept as good as possible, and the low-temperature radiator can exhibit a high heat radiation function (particularly uniform heat radiation). This is particularly effective when the device has a large heat radiation area.

[3] In the invention according to claim 3, claim 1
Or, when implementing the invention according to the second aspect, when the setting by the setting means is the low-temperature device single connection, the heat medium supply flow rate to the low-temperature radiator is a flow rate candidate preset for the single connection. Adjust the flow rate selected according to the user's specification from among the above, and, when the setting by the setting means is a low-high temperature device parallel connection, the heat medium supply flow rate to the low-temperature radiator is preset for parallel connection. The flow rate is adjusted to a flow rate selected from the flow rate candidates according to the user's specification.

That is, according to this configuration, in order to set the flow rate of the heat medium supplied to the low-temperature radiator to a predetermined large flow rate in the single connection of the low-temperature apparatus, the flow rate of the heat medium supplied to the low-temperature radiator is changed to the value for the single connection. Since the flow rate is selected according to the user's specification from the preset flow rate candidates, the flow rate of the heat medium supplied to the low-temperature radiator in the low-temperature and high-temperature device parallel connection is similarly set to a predetermined small flow rate. Since the flow rate of the heat medium supplied to the low-temperature radiator is set to a flow rate selected according to the user's specification from the flow rate candidates preset for parallel connection, the low-temperature device alone connection and the low-high temperature device In any of the parallel connection types, the heat medium supply flow rate to the low-temperature radiator is changed stepwise according to the user's specification, and the heat output of the low-temperature radiator is desired by changing the flow rate. Can be changed stepwise, in this respect, it is possible to obtain a higher functionality.

In this configuration, by providing a difference between the flow rate selected from the flow rate candidates for the single connection and the flow rate selected from the flow rate candidates for the parallel connection, the parallel connection of the low-temperature and high-temperature devices is achieved. The operation of the low-temperature radiator in this case prevents the disadvantage that the heat radiation temperature becomes excessively high.However, the flow rate candidate for the single connection and the flow rate candidate for the parallel connection overlap in their flow ranges. The flow rate selected from the flow rate candidates for single connection by the user in the low temperature unit single connection may be the same as the user's specification from the flow rate candidates for the parallel connection in the low temperature / high temperature unit parallel connection. It is only necessary to make the flow rate greater than the flow rate selected for

[4] In the invention according to claim 4, claim 1
In order to implement the invention according to any one of the above-mentioned items 3, a floor heating device is connected as the low-temperature radiator.

In other words, according to the first aspect of the present invention, the operation of the low-temperature radiator can be performed in both the low-temperature unit independent connection and the low-high-temperature unit parallel connection, while having a very simple device configuration. A configuration in which a floor heating device is connected as a low-temperature radiator as described above, since it is possible to reliably prevent a problem that the heat radiation temperature becomes excessively high, and to always maintain a proper heat radiation temperature of the low-temperature radiator. By doing so, it is possible to inexpensively construct floor heating equipment that is excellent not only in safety against low-temperature burns and the like but also in comfort.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a hot water type heat source device having a hot water supply function, and 1 denotes a heat exchanger for heating circulating hot water Wa, which is heated by a heat exchanger 1 for circulating hot water.
By supplying a to the radiators 3 and 4 through the circulation forward path 2,
The heat of the supply hot water Wa is radiated in the radiators 3 and 4 for the purpose of heating or the like, and the radiated temperature-reduced hot water Wa sent from the radiators 3 and 4 is passed through the circulation return path 5 to the heat exchanger 1 for circulating hot water. Return to and heat again.

The radiators 3 and 4 are connected, for example, by connecting only the low-temperature radiator 3 such as a floor heater or the like (including a case where a plurality of low-temperature radiators 3 are connected in parallel), and One of the low- and high-temperature radiator parallel connections in which the low-temperature radiator 3 and the high-temperature radiator 4 such as a bathroom dryer are connected in parallel can be selected.

Reference numeral 6 denotes a circulating hot water gas burner for heating the circulating hot water Wa in the process of passing through the heat exchanger 1, reference numeral 7 denotes a supply path of the fuel gas G to the circulating hot water gas burner 6, and reference numeral 8 denotes a circulating hot water gas burner 6. A gas valve for interrupting the supply of fuel gas, 9 is a gas amount adjusting valve for adjusting the amount of fuel gas supplied to the gas burner 6 for circulating hot water, and 10 is a gas burner 6 for circulating hot water.
Is a flame rod for detecting the ignition of the circulating hot water gas burner 6.

Numeral 12 is a circulation pump, 13 is a bypass for ensuring the minimum circulation amount of the circulating hot water Wa, 14 is a makeup water tank also serving as an expansion tank, 15 is a makeup water channel for the makeup water tank 14, and 16 is a makeup water valve. Reference numeral 17 denotes a temperature sensor for detecting the temperature ta of the heated hot water Wa sent from the heat exchanger 1 for circulating hot water.

On the other hand, reference numeral 18 denotes a heat exchanger for supplying hot water. The heat exchanger 18 for supplying hot water supplies water Wb from the water supply passage 19.
Is heated to generate hot water, and this hot water Wb is sent through a hot water supply path 20 to a hot water tap 21 such as a kitchen or a bathroom.

Reference numeral 22 denotes a hot water supply gas burner for heating the supply water Wb from the water supply passage 19 in the process of passing through the heat exchanger 18.
Reference numeral 3 denotes a supply path of the fuel gas G to the hot water supply gas burner 22, 24 denotes a gas valve for interrupting the supply of the fuel gas to the hot water supply gas burner 22, and 25 denotes a gas amount adjustment for adjusting a fuel gas supply amount to the hot water supply gas burner 22. A valve 26 is a spark plug for the hot water supply gas burner 22, a reference numeral 27 is a frame rod for detecting ignition of the hot water supply gas burner 22,
28 is a main supply path of the fuel gas G to both burners 6 and 22; 29 is a gas safety valve interposed in the main supply path 28;
0 is a common combustion air supply fan for both burners 6,22.

Numeral 31 denotes a water supply filter, numeral 32 denotes a water governor for keeping the water supply pressure to the hot water supply heat exchanger 18 at an appropriate pressure, and numeral 33 denotes a water supply amount to the hot water supply heat exchanger 18 (in other words, a water supply amount).
Is a temperature sensor for detecting the temperature tb of the hot water Wb delivered from the hot water supply heat exchanger 18, and 3
5 is an overpressure relief valve.

Numeral 36 denotes a controller built in the heat source device body 37 together with each of the heat exchangers 1 and 18, while numeral 38 denotes a low-temperature side operating device attached to the low-temperature radiator 3. Operation switch 39 of radiator 3 and output adjuster 4
Further, reference numeral 41 denotes a high-temperature operation device attached to the high-temperature radiator 4, and includes an operation switch 42 of the high-temperature radiator 4 and an output adjuster 43.

The controller 36 is provided with setting means 44 for setting whether the connection state of the radiator is the low-temperature unit alone connection or the low-temperature unit parallel connection by a predetermined manual operation such as insertion and removal of a dedicated pin by the equipment installer. In the case where the setting by the setting means 44 is a single connection of the low-temperature radiator, when the operation switch 39 of the low-temperature radiator 3 is turned ON, the controller 36
When the operation switch 39 of the low-temperature radiator 3 is turned off, the circulating hot water gas burner 6 is extinguished and the circulating pump 12 is activated. Then, the fan 30 is stopped to end the hot water circulation operation.

On the other hand, when the setting by the setting means 44 is parallel connection of the low and high temperature devices, the controller 36 sets the operation switch 39 of the low temperature radiator 3 to the operation switch 42 of the high temperature radiator 4 to O.
When the N operation is performed, the circulation pump 12 and the fan 30 are activated, and the circulation hot water gas burner 6 is ignited to start the hot water circulation operation. The operation switch 39 of the low-temperature radiator 3 and the operation switch 42 of the high-temperature radiator 4 are operated. When both are turned off, the circulating hot water gas burner 6 is extinguished, the circulating pump 12 and the fan 30 are stopped, and the circulating hot water operation is terminated.

Regardless of the setting by the setting means 44, the controller 36 sets the fan 30 when the hot water tap 21 is opened and the water flow is detected by the water flow rate sensor 33 to detect the water flow. Is started and the hot-water supply gas burner 22 is ignited to start the hot-water supply operation. During the hot-water supply operation, the gas amount adjusting valve 25 is adjusted based on the hot-water temperature tb detected by the temperature sensor 34 so that the hot-water supply heat exchanger 18 The hot water supply gas burner 22 is extinguished when the hot water tap 21 is closed and the water flow detection is detected by the water amount sensor 33, and then the hot water supply gas burner 22 is extinguished. At the same time, the fan 30 is stopped to end the hot water supply operation.

Further, in accordance with the setting by the setting means 44, the controller 36 stores the temperature ta of the hot water Wa to be supplied to the connection radiators 3 and 4 (that is, the heat medium supplied to the radiator).
As shown in FIG. 2, when the setting by the setting unit 44 is the low-temperature unit alone connection, the switching unit 45 is provided with the gas amount adjusting valve 9 based on the detection temperature ta of the temperature sensor 17. To adjust the temperature ta of the supply hot water Wa to a preset low temperature taL (for example, 6
0 ° C.), and when the setting by the setting means 44 is the parallel connection of the low and high temperature devices, the gas amount adjusting valve 9 is adjusted based on the detected temperature ta of the temperature sensor 17 to send. A “high-temperature feed mode” is performed in which the temperature ta of the hot water Wa is set to a preset high temperature taH (for example, 80 ° C.).

In addition to the temperature switching, the switching means 45 is provided with a thermal valve 46 built in the apparatus body 37 of the heat source device.
Changing the ratio between the open time of the heat operated valve 46 (hot water supply time) and the closed time of the heat operated valve 46 (hot water supply stop time) by repeatedly intermittently supplying hot water to the low-temperature radiator 3 by opening and closing In the case where the setting by the setting means 44 is the low temperature device single connection, the hot water supply amount to the connected low temperature radiator 3 is set to a preset large flow rate, while the setting by the setting means 44 is the low and high temperature device parallel connection. In the case of (1), the supply amount of the hot water to the connected low-temperature radiator 3 is set to a predetermined small flow rate, and by switching the flow rate, the low-temperature radiator in the parallel connection of the low-temperature high-temperature radiator that supplies the hot water Wa of the high temperature taH is provided. 3
In the operation of, the heat radiation temperature of the low-temperature radiator 3 is prevented from becoming excessively high.

Specifically, in order to perform the flow rate switching, the output adjuster 40 of the low-temperature operation device 38 is of an operation type in which the user can switch and designate a desired heat radiation output in nine steps. The switching unit 45 changes the opening time and the closing time of the thermal valve 46 in accordance with the designation by the output adjuster 40, as shown in FIG.
In the case where the setting by 4 is the low-temperature unit single connection (low-temperature feeding mode), the time candidate of the left orchid in the figure preset in each of the nine designated stages for the single connection (in other words, the single connection) Among the flow rate candidates that are set in advance for
The opening time and closing time of the thermal valve 46 to be adopted are selected according to the designated stage by the output adjuster 40.

When the setting by the setting means 44 is the parallel connection of the low- and high-temperature devices (high-temperature feed mode), the time indicated by the right or left in the figure is preset for each of the nine designated stages for the parallel connection. From the candidates (in other words, the flow rate candidates preset for parallel connection), the thermal valve 46 to be adopted
The open time and the close time are selected according to the designated stage by the output adjuster 40, thereby limiting the amount of hot water supplied to the low-temperature radiator 3 when the low-temperature and high-temperature devices are connected in parallel to a smaller amount than when the low-temperature device is connected alone. However, in either case,
The heat radiation output of the low-temperature radiator 3 can be changed in nine steps according to the user's request by designating with the output adjuster 40.

The high-temperature radiator 4 has a built-in thermal valve that adjusts the flow rate of hot water supplied to itself. The heat output of the high-temperature radiator 4 is changed by changing it according to the designation by the tool 43.

[Another Embodiment] The low-temperature radiator 3 may be of any use, such as a floor heating device or a bed or a chair having a heating function. It may be of any use, such as a fan convector or a sauna device.

In each of the above-described embodiments, an example is shown in which hot water is used as the heating medium Wa. However, the heating medium Wa for the radiators 3 and 4 is not limited to hot water, but may be steam or various aqueous solutions. (Brine).

In each of the above-described embodiments, an example in which the ratio of the heat medium supply time to the heat medium supply stop time is changed in the intermittent repetition of the heat medium supply to change the heat medium supply flow rate to the low-temperature radiator 3 is described. However, depending on the case, a form in which the flow rate of the heat medium supplied to the low-temperature radiator 3 is changed by restricting by a valve may be adopted.

The setting means 44 for setting whether the connection state of the radiator is the low-temperature unit alone connection or the low-temperature high-temperature unit parallel connection is provided by a method of changing the setting by inserting and removing a pin, and by operating a changeover switch. Various setting operation formats including a configuration switching format can be adopted.

[Brief description of the drawings]

FIG. 1 is a structural diagram of a heat source device.

FIG. 2 is a flowchart of mode selection.

FIG. 3 is a table showing a setting example of a heating medium supply time and a stop time.

[Explanation of symbols]

 Reference Signs List 3 low-temperature radiator 4 high-temperature radiator 38 low-temperature side operation device 44 setting means 45 switching means ta Temperature of supply heat medium Wa heat medium

Claims (4)

[Claims] A heat source device for supplying a heat medium to be circulated to a radiator, wherein the radiator is connected to a low-temperature radiator alone connected to only a low-temperature radiator or to a low-temperature radiator and a high-temperature radiator. Is set in parallel to connect the low- and high-temperature units in parallel. When the setting by the setting unit is the low-temperature unit alone connection,
The temperature of the heat transfer medium is set to a predetermined low temperature, and the flow rate of the heat medium supplied to the low-temperature radiator is set to a predetermined large flow rate. In some cases, the heat source device is provided with switching means for setting the temperature of the heat transfer medium to a preset high temperature and setting the flow rate of the heat medium supplied to the low-temperature radiator to a preset small flow rate. 2. The method according to claim 1, wherein the switching unit changes the ratio between the heating medium supply time and the heating medium supply stop time in the repetition of intermittent supply of the heating medium to the low-temperature radiator. 2. The heat source device according to claim 1, wherein a switching is performed between a heat medium supply flow rate to the radiator and a heat medium supply flow rate to the low temperature radiator when the low and high temperature radiator is connected in parallel. 3. The method according to claim 1, wherein the setting unit sets the switching unit to a low-temperature unit single connection.
The heating medium supply flow rate to the low-temperature radiator is adjusted to a flow rate selected according to the user's specification from flow rate candidates preset for single connection, and the setting by the setting means is performed by the low- and high-temperature device parallel connection. In the case of (1), the flow rate of the heat medium supplied to the low-temperature radiator is adjusted to a flow rate selected according to a user's designation from flow rate candidates preset for parallel connection.
Or the heat source device according to 2. 4. The heat source device according to claim 1, wherein a floor heating device is connected as the low-temperature radiator.