JP6802972B2 - Hot air heater - Google Patents

Description

The present invention relates to a hot air heating device such as a fan control vector.

The applicant has previously proposed the one described in Patent Document 1 as an example of the fancon vector.
The fan control vector described in the same document includes a housing in which an air flow path from an air inlet to an air outlet is formed inside, a fan arranged in the housing, a heat exchanger for heating air, and a heat exchanger for heating air. It is equipped with a temperature sensor for detecting room temperature. By driving the fan, the indoor air is sucked into the air flow path from the suction port and heated by the heat exchanger, and this is blown out from the outlet as warm air. During the operation of such a fan control vector, the temperature detected by using the temperature sensor for detecting the room temperature is controlled so as to be a predetermined target temperature.

However, in the above-mentioned prior art, there is still room for improvement as described below.

That is, in order to properly operate the fan control vector, it is necessary to accurately detect the room temperature of the room to be heated by using the temperature sensor. On the other hand, in Patent Document 1, measures such as preventing the temperature sensor from receiving heat from the hot water pipe of the heat exchanger and providing an opening for releasing heat above the installation location of the temperature sensor are taken. However, no measures have been taken to actively cause the indoor air outside the housing to act on the temperature sensor.
Specifically, the temperature sensor is arranged in the housing so as to be located in front of the ventilation holes provided on the front panel of the housing. However, with only such a configuration, the action of the indoor air outside the housing passing through the ventilation holes and positively flowing into the installation location of the temperature sensor cannot be obtained. Therefore, the temperature detected by using the temperature sensor may not exactly match the actual room temperature, and it may be difficult to optimize the heating operation.
For example, if the fan control vector is installed in the corner of the room, or if there is an obstacle in front of the hot air outlet, the heat of the hot air tends to be trapped in the temperature sensor installation location in the housing. In this case, although the room temperature of the entire room is low, the temperature detected by the temperature sensor is higher. This will unreasonably stop the warm air blow. In addition, since the stored heat continues to stay at the location where the temperature sensor is installed, the start time of warm air blowing may be delayed. In particular, when the heat source unit for supplying hot water to the heat exchanger is shared with other hot water heating devices and a heat valve is used to switch the hot water supply to the heat exchanger on and off, heat is generated. Since it takes several minutes to close the valve, the hot water supply to the heat exchanger continues during that period. For this reason, heat is more likely to be trapped in the place where the temperature sensor is installed due to heat dissipation from the heat exchanger, and the above-mentioned problems become more prominent.

Japanese Unexamined Patent Publication No. 2016-95069

The present invention has been conceived under the above-mentioned circumstances, and hot air heating such as a fan control vector capable of improving the detection accuracy of room temperature and performing appropriate heating operation by a simple means. The challenge is to provide the equipment.

In order to solve the above problems, the following technical measures are taken in the present invention.

The hot air heating device provided by the present invention includes a housing in which an air flow path from an air suction port to an air outlet is formed inside, and a housing arranged in the housing and sucking indoor air into the suction port. A fan that enables the hot air blowing operation of sucking air into the air flow path and blowing out the air heated by the heating unit separately provided in the housing from the outlet, and the heating unit in the housing. and said spaced apart from the air flow path, and wherein the outside of the housing and the temperature sensor for room temperature detection is disposed at a location which communicates via a vent vacuum installation location is due to the fan of the temperature sensor A warm air heating device including a negative pressure communicating portion that communicates an installation location of the temperature sensor or a region near the installation location of the temperature sensor with a suction negative pressure generating region of the air flow path so as to be a region. In the housing, a partition wall portion that partitions the air flow path and another region adjacent thereto is provided in the width direction of the housing, and the temperature sensor is the partition wall in the width direction. The negative pressure communication portion is provided at a position opposite to the air flow path via the portion, and the negative pressure communication portion is connected to an opening provided through the partition wall portion and one end is connected to the opening. The other end includes a duct located at the installation location of the temperature sensor or a region in the vicinity thereof, and the housing includes a housing body having an open front portion and a front panel closing the front opening of the housing body. A standing wall portion extending from the installation location of the temperature sensor or a region in the vicinity thereof to the partition wall portion and provided on the housing main body so as to face the front panel, and the standing wall portion thereof. A concave portion that opens facing the wall portion and is provided on the inner surface side of the front panel so as to extend in the same direction as the upright wall portion is further provided, and the duct is an opening of the concave portion. It is characterized in that the front panel and the upright wall portion are combined so as to be closed by the upright wall portion .

According to such a configuration, the following effects can be obtained.
That is, when the fan is driven, the air at the location where the temperature sensor is installed is taken into the suction negative pressure generation region of the air flow path, and heat can be prevented from being trapped at the location where the temperature sensor is installed. .. In addition, indoor air can be positively flowed from the ventilation holes to the installation location of the temperature sensor in the housing. As a result, it is possible to prevent the temperature detected by using the temperature sensor from becoming higher than the actual room temperature, and to improve the detection accuracy of the room temperature. Therefore, it is possible to optimize the operation of the hot air heating device, or to realize an appropriate operating state close to this.
Further, according to such a configuration, it is possible to suppress an increase in manufacturing cost by setting the temperature sensor installation location as a negative pressure region by a simple configuration.
Further, according to such a configuration, a duct for setting the temperature sensor installation location as a negative pressure region can be rationally configured by using the front panel, which further suppresses an increase in manufacturing cost. preferable.

In the present invention, preferably, the temperature detected by the temperature sensor for detecting the room temperature is equal to or higher than a predetermined target temperature, so that the fan is in the heating operation during the period during which the heating operation is suspended. It is configured to drive intermittently or continuously at lower speeds.

According to such a configuration, even during the suspension period of the heating operation (during the suspension period of the warm air blowing operation), the temperature sensor installation location is set to a negative pressure to prevent heat from being trapped in the temperature sensor installation location. , And the inflow of indoor air to the installation location of the temperature sensor can be promoted. Therefore, it is possible to prevent a problem such as a delay in restarting the heating operation due to the detection error of the room temperature. Further, since the rotation speed of the fan is set to be lower than that during the heating operation, it is possible to save energy and to prevent the user from feeling uncomfortable as follows. That is, unlike the above configuration, if the fan is driven at a high rotation speed even though the heating operation is suspended, the amount of air blown from the outlet is large and the blowing noise at that time is also loud. Therefore, the user is likely to misunderstand that the heating operation is still being performed. On the other hand, according to the above configuration, it is possible to appropriately avoid such a situation.

In the present invention, preferably, the temperature sensor for detecting the room temperature is in the middle of the air flow path from the time when the indoor air flows into the housing through the ventilation hole to the time when the negative pressure communication portion is reached, or the air. It is provided so as to be located at a location facing the flow path.

Such a configuration is more preferable for improving the accuracy of room temperature detection.

Other features and advantages of the present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

It is a perspective view of the fan convector which is an example of the hot air heating apparatus which concerns on this invention. It is a schematic cross-sectional view of II-II of FIG. It is a perspective view of the main part in a state where the front panel of the fan control vector shown in FIG. 1 is removed. (A) is a front sectional view of a main part in a state where a front panel is assembled in the structure shown in FIG. 3, (b) is an IVb-IVb sectional view of (a), and (c) is a sectional view of the main part. It is sectional drawing of IVc-IVc of (a). It is a flowchart which shows an example of the operation control executed in the fan control vector shown in FIG. Another example of the fan control vector is shown, (a) is a perspective view of a main part with the front panel removed, and (b) is a cross-sectional view of the main part with the front panel attached.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

The fan control vector A shown in FIGS. 1 and 2 corresponds to an example of the hot air heating device according to the present invention, and includes a housing 1, a fan 2 arranged in the housing 1, and a heat exchanger 3. There is. Further, the temperature sensor 4 for detecting the room temperature shown in FIGS. 3 and 4 and the negative pressure communicating portion B shown in FIG. 4 are also provided.

The overall basic configuration of the fan control vector A is the same as that of Patent Document 1, and this point will be briefly described. That is, the housing 1 is composed of a combination of a front opening-shaped housing main body 1a and a front panel 1b that closes the front opening of the housing main body 1a, and the front panel 1b is the housing main body. It is removable to the part 1a. The front surface of the housing 1 is provided with an indoor air suction port 50, a warm air outlet 51 provided with a plurality of louvers 52, and a ventilation hole 10 for detecting room temperature, as shown in FIG. In addition, an air flow path 5 from the suction port 50 to the outlet 51 is formed in the housing 1.

The heat exchanger 3 and the fan 2 are arranged at intermediate positions in the air flow path 5. The heat exchanger 3 corresponds to an example of the "heating unit" in the present invention, and a fin tube type is used. Although not shown in the illustration, hot water heated by using a heat source machine is supplied to the heat exchanger 3, and the heat generation of the heat exchanger 3 is turned on / off by turning on / off the operation of the heat source machine. Alternatively, it is performed by opening and closing a valve such as a thermal valve attached to a hot water supply pipe connected to the heat exchanger 3. The fan 2 is driven and rotated by the motor M shown in FIG. 3, and the air sucked into the air flow path 5 from the suction port 50 is heated by passing through the heat exchanger 3 by the drive rotation of the fan 2. Moreover, this air is blown out as warm air from the outlet 51.

In FIGS. 3 and 4, the temperature sensor 4 for detecting the room temperature is, for example, a thermistor, and its wiring cord 40 is connected to a controller (not shown) that executes operation control of each part of the fan control vector A. The temperature sensor 4 is located at a position separated from the heat exchanger 3 and the air flow path 5, and is provided in the inner part of the ventilation hole 10 in the housing 1. More specifically, a plate-shaped sensor bracket portion 6 that stands up in the vertical height direction is provided at a portion of the housing main body portion 1a that faces the ventilation hole 10, and the temperature is provided on the front surface side thereof. The sensor 4 is attached. The sensor bracket portion 6 has a fixture 60 for fixing the temperature sensor 4 and a plurality of through holes 61. Further, the sensor bracket portion 6 is provided, for example, connected to both or one of the upper support plate portion 12 on which the motor M is mounted and the lower support plate portion 13 located below the upper support plate portion 12. The temperature sensor 4 is installed to some extent except that a ventilation hole 10 is provided in front of the temperature sensor 4 and a notched or non-notched opening 12a is provided in the upper support plate portion 12. It is said to be a spatial area with airtightness. The opening 12a provided in the upper support plate portion 12 is a portion where heat (high temperature air) in and around the installation location of the temperature sensor 4 can be released above the upper support plate portion 12. When the drive of the fan 2 is stopped, it plays a role of suppressing heat from being trapped in the installation location of the temperature sensor 4.

The negative pressure communication portion B shown in FIG. 4 attracts negative pressure from the air flow path 5 at or near the installation location of the temperature sensor 4 so that the installation location of the temperature sensor 4 becomes the negative pressure region when the fan 2 is driven. It is a part for communicating with the pressure generation region 5a. The suction negative pressure generation region 5a is a region of the air flow path 5 on the upstream side in the air flow direction with respect to the fan 2.

The negative pressure communication portion B is configured by combining an opening 14a provided in the partition wall portion 14 and a duct 7. More specifically, a partition wall portion 14 for partitioning between the installation area of the fan 2 (air flow path 5) and the installation area of the motor M is provided, and the partition wall portion 14 is provided. Is provided with an opening 14a penetrating in the left-right lateral width direction of the housing 1. The duct 7 is provided so that one end is connected to the opening 14a and the other end is located above or above the temperature sensor 4 to open. Therefore, when the fan 2 is driven and rotated, the suction negative pressure action of the fan 2 extends to the installation location of the temperature sensor 4 and the peripheral region thereof.

The duct 7 is composed of a combination of an upright wall portion 70 provided upright on the upper surface of the upper support plate portion 12 and a front panel 1b. The upright wall portion 70 is a portion that extends from a position above or above the mounting portion of the temperature sensor 4 to the partition wall portion 14 and is provided so as to face the front panel 1b. On the other hand, on the inner surface side of the front panel 1b, two upper and lower protrusions 71a and 71b are projected, and the inter-regional region between these protrusions 71a and 71b opens facing the upright wall 70. Moreover, it is a concave portion 72 extending in the same direction as the upright wall portion 70. In a state where the front panel 1b is attached to the housing body 1a, the opening of the concave portion 72 is closed by the upright wall portion 70, and a duct 7 having the concave portion 72 as an internal cavity is configured. There is.

Next, the operation of the fancon vector A described above will be described.

First, when the fan 2 is driven, the air at the location where the temperature sensor 4 is installed and its vicinity is sucked into the suction negative pressure generation region 5a of the air flow path 5 via the negative pressure communication portion B. Therefore, it is possible to prevent heat from being trapped in the place where the temperature sensor 4 is installed and the surrounding area. Further, the indoor air passes through the ventilation holes 10 and positively flows into the installation location of the temperature sensor 4. As a result, it is possible to prevent the detection temperature using the temperature sensor 4 from becoming higher than the actual room temperature, and to improve the detection accuracy of the room temperature. Therefore, it is possible to appropriately control the operation of the fan control vector A. In the present embodiment, as shown in FIG. 4B, the temperature sensor 4 follows the air flow path through which the indoor air passes through the ventilation holes 10 and flows into the housing 1 to reach the negative pressure communication portion B. It is provided so as to face it. Therefore, the degree to which the indoor air comes into direct contact with the temperature sensor 4 increases, and it is possible to detect the room temperature with higher accuracy and with good reactivity.

The fan control vector A is configured to execute the operation control as shown in the flowchart of FIG. 5, and this point will be described below.

First, when the fan control vector A is set to the operation on (power on) state, the room temperature is detected by using the temperature sensor 4 for detecting the room temperature, and if the detected temperature is less than the preset target temperature, The heating operation is started (S1: YES, S2: YES, S3). In this heating operation, the heat exchanger 3 is on (the hot water is supplied to the heat exchanger 3), the fan 2 is in the driving state, and the rotation speed of the fan 2 is the normal rotation speed set for the heating operation. Is.

Unlike the above, when the detection temperature using the temperature sensor 4 is originally equal to or higher than the target temperature when the operation is turned on, or when the detection temperature reaches the target temperature or higher as a result of the above-mentioned heating operation. The heating operation is put into hibernation (S2: NO, S4). The hibernation state of the heating operation is a state in which the heat exchanger 3 is off and the fan 2 is stopped. If the detected temperature drops below the target temperature during the suspension of the heating operation, the heating operation is restarted (S5: YES, S3).

On the other hand, if the detected temperature does not drop below the target temperature within the predetermined first time T1 (for example, 90 seconds), the fan 2 is driven at a low speed (S5: NO, S6: YES, S7). When the detection temperature drops below the target temperature due to the drive of the fan 2, the heating operation is restarted (S8: YES, S3), but unlike this, a predetermined second time T2 (for example, 60 seconds) If the detected temperature does not drop below the target temperature, the fan 2 is stopped (S8: NO, S9: YES, S4). Therefore, if the detected temperature does not drop below the target temperature during the suspension of the heating operation, the low-speed drive period of the fan 2 in the second time T2 and the stop of the fan 2 in the first time T1 The period is repeated, and if the detected temperature falls below the target temperature during this period, the heating operation is restarted.

As described above, if the fan 2 is rotated even though the heating operation is suspended, heat is prevented from being trapped in the installation location of the temperature sensor 4 even during this period, and the room temperature is detected. Can be done accurately. Therefore, in reality, even though the room temperature has dropped below the target temperature, it is possible to prevent problems such as delay in restarting the heating operation due to heat retention. Since the rotation speed of the fan 2 during the suspension of the heating operation is set to be low, it is possible to reduce the possibility that the user mistakenly thinks that the rotation of the fan 2 is the rotation during the heating operation. .. Further, if the fan 2 is driven at a low speed and intermittently, the energy saving effect can be enhanced.
While the heating operation is stopped, the fan 2 can be continuously driven instead of the intermittent drive as described above.

FIG. 6 shows another embodiment of the fancon vector . In the figure, elements that are the same as or similar to those of the embodiment are designated by the same reference numerals as those of the embodiment, and duplicate description will be omitted.

In the embodiment shown in FIG. 6, the sensor bracket portion 6 is provided with an opening 66 facing the temperature sensor 4, and the opening 66 and the opening 14a of the partition wall portion 14 are connected via a hose 7A. It is connected. In the present embodiment, the negative pressure communication portion B is configured by using the hose 7A. Even with such a configuration, it is possible to obtain the same operation as that of the above-described embodiment. In the present embodiment, since the temperature sensor 4 is provided in the middle of the air flow path through which the room air passes through the ventilation hole 10 and reaches the hose 7A, the room air can easily come into direct contact with the temperature sensor 4. It is possible to detect room temperature with high accuracy and with good reactivity.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the hot air heating device according to the present invention can be variously redesigned within the scope intended by the present invention.

The hot air heating device according to the present invention is not limited to the fan control vector. As the "heating unit" in the present invention, for example, a burner or an electric heater can be used instead of the heat exchanger. Therefore, it can be configured as a gas hot air heating device, an oil hot air heating device, or an electric heater type hot air heating device.

A fan control vector (temperature sensor)
B Negative pressure communication part 1 Housing 14 Partition wall part 14a Opening 2 Fan 3 Heat exchanger (heating part)
4 Temperature sensor (for room temperature detection)
5 Air flow path 5a Suction negative pressure generation region (of the air flow path)
50 Suction port 51 Blowout port 7 Duct 7A Hose

Claims (3)

A housing that internally forms an air flow path from the air inlet to the air outlet,
It is possible to perform a warm air blowing operation that is arranged in the housing and sucks indoor air from the suction port into the air flow path and blows out air heated by a heating unit separately provided in the housing from the blowing port. With fans
A temperature sensor for detecting room temperature, which is arranged in the housing at a location that is separated from the heating portion and the air flow path and communicates with the outside of the housing through a ventilation hole.
The As setting locations of the temperature sensor is a negative pressure region by the fan, the negative pressure communication passage portion which communicates locations or communication with the suction negative pressure generating region of the airflow path near region of the temperature sensor,
It is a hot air heating device equipped with
In the housing, a partition wall portion for partitioning the air flow path and another region adjacent thereto is provided in the width direction of the housing.
The temperature sensor is provided at a position opposite to the air flow path via the partition wall portion in the lateral width direction.
The negative pressure communication portion includes an opening provided through the partition wall portion and a duct having one end connected to the opening and the other end located at the installation location of the temperature sensor or a region in the vicinity thereof. With,
The housing is configured by combining a housing body having an open front portion and a front panel that closes the front opening of the housing body.
An upright wall portion that extends from the installation location of the temperature sensor or a region near the temperature sensor to the partition wall portion and is provided on the housing body so as to face the front panel.
A concave portion that opens facing the upright wall portion and is provided on the inner surface side of the front panel so as to extend in the same direction as the upright wall portion.
Is further equipped with
The duct is a hot air heating device, characterized in that the front panel and the upright wall portion are combined so that the opening portion of the concave portion is closed by the upright wall portion . The hot air heating device according to claim 1.
When the temperature detected by the temperature sensor for detecting the room temperature is equal to or higher than a predetermined target temperature, the fan is intermittently operated at a lower rotation speed than during the heating operation during the period during which the heating operation is suspended. A hot air heater that is configured to be driven in a targeted or continuous manner. The hot air heating device according to claim 1 or 2.
The temperature sensor for detecting the room temperature is located in the middle of the air flow path from when the indoor air flows into the housing through the ventilation hole to when it reaches the negative pressure communication portion, or at a position facing the air flow path. A hot air heater that is installed so that it is located .

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