JP2017194237A - Hybrid type hot air heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hybrid type hot air heater capable of suppressing an increase in heating cost while sufficiently securing a heating output by heating means.SOLUTION: In operation control means provided in a hybrid type hot air heater, when a target heating output of heating means H is equal to or less than a predetermined middle heating output between the lowest heating output and the highest heating output, an electric type heating part He does not operate, and the heating means H is operated in a state in which a combustion type heating part Hf operates so as to exert a predetermined combustion heating output between the lowest combustion heating output and the highest combustion heating output. When the target heating output of the heating means H is larger than the middle heating output, the combustion type heating part Hf operates so as to exert the maximum combustion heating output, and the heating means H is operated in a state in which the electric type heating part He operates so as to exert a predetermined electric heating output between the lowest electric heating output and the highest electric heating output.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a burner that burns fuel gas, and a combustion heating fan that takes in air in the space to be heated, mixes the introduced air and the combustion gas in the burner, and blows it out to the space to be heated. An air heating fan that takes in air in the space to be heated and blows the air that has been taken in to the space to be heated, and air that is ventilated by the air heating fan The present invention relates to a hybrid hot-air heater provided with heating means having an electric heating unit having an electric heater for heating the air.

  Patent Document 1 describes a hybrid hot air heater having a combustion heating unit and an electric heating unit. In this hybrid hot air heater, the combustion heating unit is always operated during heating operation, and the electric heating unit is configured to operate only during rising heating. That is, in the hybrid hot air heater described in Patent Document 1, both the combustion heating unit and the electric heating unit operate during rising heating, and only the combustion heating unit operates during other heating.

Comparing the heating cost by the combustion heating unit and the heating cost by the electric heating unit, due to the difference in energy unit price, the heating cost by the electric heating unit is, for example, heating by the combustion heating unit when city gas is used as fuel. Compared to the cost, the cost for obtaining the same amount of heat is about 2.5 times higher.
Therefore, in the hybrid hot air heater described in Patent Document 1, the timing of operating the electric heating unit that increases the heating cost is limited to a short time only during the start-up heating. The energy cost for heating can be suppressed as compared with the case of operating even when not heating.

JP-A-5-0334010

As in the hybrid hot air heater described in Patent Document 1, when the timing at which the electric heating unit operates is limited to a short time only during rising heating, when the heating load such as midwinter is high, heating is performed. There is a possibility that the heating output by the means is insufficient and the temperature of the space to be heated cannot be maintained at the target temperature.
However, when the electric heating unit is always operated during the heating operation, there is a problem that the heating cost increases as described above.

  This invention is made | formed in view of said subject, The objective is to provide the hybrid type hot air heater which can suppress the raise in heating cost, ensuring sufficient heating output by a heating means. is there.

In order to achieve the above object, the characteristic configuration of the hybrid hot air heater according to the present invention includes a burner that burns fuel gas, the air in the space to be heated, and the introduced air and the combustion gas of the burner. Combustion-type heating unit having a combustion-type heating blower that mixes and blows out into the heating target space, and takes in the air in the heating target space and blows out the introduced air into the heating target space A heating means having an electric heating unit having an electric heating fan that ventilates air, and an electric heater that heats the air ventilated by the electric heating fan, and
Temperature measuring means for measuring the temperature of the space to be heated, and
A hybrid hot air heater provided with an operation control means for controlling operation,
The operation control unit is configured to control the heating based on a temperature difference between the air temperature measured by the temperature measuring unit and the target temperature so that the air temperature measured by the temperature measuring unit becomes a predetermined target temperature. Performing an output determination process for determining a target heating output of the means between a minimum heating output and a maximum heating output, and operating the heating means to exert the target heating output determined in the output determination process,
The operation control means in the output determination process,
When the target heating output of the heating means is equal to or lower than a predetermined midway heating output between the lowest heating output and the highest heating output, the electric heating unit does not operate and the combustion heating unit is the lowest Operating the heating means in a state of operating to exert a predetermined combustion heating output between the combustion heating output and the maximum combustion heating output;
When the target heating output of the heating means is larger than the midway heating output, the combustion heating unit operates to exhibit the maximum combustion heating output, and the electric heating unit has a minimum electric heating output and a maximum The heating means is operated in a state of operating so as to exhibit a predetermined electric heating output between the electric heating output.

According to the above characteristic configuration, when the target heating output of the heating means is between the minimum heating output and the predetermined midway heating output, only the combustion heating unit operates, so that an increase in heating cost can be suppressed. On the other hand, when the target heating output of the heating means is between the predetermined intermediate heating output and the maximum heating output, both the combustion heating unit and the electric heating unit operate, so the heating output by the heating unit Can be secured sufficiently.
Further, when increasing the target heating output of the heating means, the combustion heating output of the combustion heating unit is preferentially increased until the target heating output becomes the above-mentioned midway heating output, and the target heating output is larger than the above-mentioned midway heating output. Then, the electric heating output of the electric heating unit is increased. On the other hand, when the target heating output of the heating means is reduced, the electric heating output of the electric heating unit is preferentially decreased until the target heating output becomes the midway heating output, and the target heating output is reduced to the midway heating. When the output is lower than the output, the combustion heating output of the combustion heating unit is reduced. In other words, when the target heating output of the heating means is increased, the combustion heating output of the combustion heating section is prioritized and increased, and when the target heating output of the heating means is decreased, the electric heating output of the electric heating section is prioritized and decreased. The combustion heating unit and the electric heating unit are operated so that
Therefore, it is possible to provide a hybrid hot air heater that can suppress an increase in heating cost while sufficiently ensuring heating output by the heating means.

  Another characteristic configuration of the hybrid hot air heater according to the present invention is that the operation control unit is configured to have a predetermined electric heating suppression condition when the electric heating output of the electric heating unit is suppressed in the output determination process. Is satisfied, the electric heating output of the electric heating unit is determined by setting the maximum output at the time of suppression below the maximum electric heating output as an upper limit.

  According to the above characteristic configuration, when a predetermined electric heating suppression condition is satisfied, the electric heating output of the electric heating unit is set to an upper limit at a predetermined maximum output during suppression that is less than the maximum electric heating output. That is, the electric heating output of the electric heating unit is suppressed and the heating cost is also suppressed.

  According to still another feature of the hybrid hot air heater according to the present invention, the operation control means is configured to control the air measurement temperature measured by the temperature measuring means at the start of operation or during operation of the heating means in the output determination process. If the temperature is equal to or higher than the set temperature, it is determined that the electric heating suppression condition is satisfied.

  According to the above characteristic configuration, when the temperature of the air measured by the temperature measurement means is equal to or higher than the set temperature at the start of operation or during operation of the heating means, the electric heating output of the electric heating unit is less than the maximum electric heating output. The maximum output at a predetermined suppression is set as the upper limit. In other words, if the temperature of the air measured by the temperature measuring means is high, such as when the temperature of the air is higher than the set temperature, the heating output by the heating means will not be insufficient even if the output of the electric heating unit is small. The effect of reducing the heating cost by reducing the output of the heating unit can be obtained.

  Still another characteristic configuration of the hybrid hot air heater according to the present invention is that the maximum output during suppression is smaller as the temperature of the air measured by the temperature measuring unit is higher when the heating unit starts operating or during operation. The point is set to the value.

The higher the temperature of the air measured by the temperature measuring means, the smaller the heating output required for the heating means. In this feature configuration, the higher the temperature of the air measured by the temperature measuring means, the higher the output of the electric heating unit. Set (maximum output during suppression) to a small value. As a result, the effect of reducing the heating cost by reducing the output of the electric heating unit can be greatly obtained.

  According to still another feature of the hybrid hot air heater according to the present invention, the operation control means is configured to control the air measurement temperature measured by the temperature measuring means at the start of operation or during operation of the heating means in the output determination process. If the temperature difference between the temperature and the target temperature is equal to or less than the set temperature difference, it is determined that the electric heating suppression condition is satisfied.

  According to the above characteristic configuration, when the temperature difference between the air temperature measured by the temperature measurement means and the target temperature is equal to or less than the set temperature difference at the start or during the operation of the heating means, the electric heating output of the electric heating unit The upper limit is the maximum output at the time of a predetermined suppression that is less than the maximum electric heating output. That is, if the temperature difference between the temperature of the air measured by the temperature measuring means and the target temperature is high, such as the temperature difference being equal to or less than the set temperature difference, the heating output by the heating means can be reduced even if the output of the electric heating unit is small. Since there is no shortage, the effect of reducing the heating cost by reducing the output of the electric heating unit can be obtained.

  Still another characteristic configuration of the hybrid hot air heater according to the present invention is that the temperature difference between the temperature of the air measured by the temperature measuring unit and the target temperature is smaller when the heating unit starts operating or during operation. The maximum output during suppression is set to a small value.

The smaller the temperature difference between the air temperature measured by the temperature measuring means and the target temperature, the smaller the heating output required for the heating means.
Therefore, in this characteristic configuration, the maximum output (maximum output during suppression) of the electric heating unit is set to a smaller value as the temperature difference between the temperature of the air measured by the temperature measuring unit and the target temperature is smaller. As a result, the effect of reducing the heating cost by reducing the output of the electric heating unit can be greatly obtained.

Still another characteristic configuration of the hybrid hot air heater according to the present invention includes a suppression instruction receiving unit that receives an instruction to suppress the electric heating output of the electric heating unit from a user,
In the output determination process, the operation control unit is configured such that the electric heating suppression condition is satisfied when the suppression instruction receiving unit receives an instruction to suppress the electric heating output of the electric heating unit from a user. It is in the point to judge.

  According to the above characteristic configuration, when an instruction for suppressing the electric heating output of the electric heating unit is received from the user, the electric heating output of the electric heating unit is a predetermined suppression less than the maximum electric heating output. Maximum output is the upper limit.

It is a perspective view which shows the external appearance of a hybrid type hot air heater. It is a vertical right side view of a hybrid type hot air heater. It is a vertical front view of a hybrid type hot air heater. It is a figure which shows the operation part of a hybrid type hot air heater. It is a block diagram which shows the control structure of a hybrid type hot air heater. It is a flowchart explaining the driving | operation with the hybrid type heating of 1st Embodiment. It is a flowchart explaining the driving | operation with the hybrid heating of 2nd Embodiment. It is a flowchart explaining the driving | operation with the hybrid heating of 3rd Embodiment.

<First Embodiment>
Hereinafter, based on a drawing, a hybrid type warm air heater concerning a 1st embodiment of the present invention is explained.
FIG. 1 is a perspective view showing an appearance of a hybrid hot air heater, FIG. 2 is a vertical right side view of the hybrid hot air heater, and FIG. 3 is a vertical front view of the hybrid hot air heater. . FIG. 4 is a diagram showing an operation unit of the hybrid hot air heater, and FIG. 5 is a block diagram showing a control configuration of the hybrid hot air heater. As shown in the figure, the hybrid hot air heater is a gas burner 1 that burns fuel gas (an example of a burner), takes in air in the space to be heated, and mixes the taken-in air with the combustion gas in the gas burner 1. Combustion-type heating unit Hf provided with combustion-type heating blower 2 that ventilates air to be blown into the heating target space, takes air in the heating target space, and blows air so that the taken-in air is blown out to the heating target space An electric heating unit He provided with an electric heating fan 3 for heating and a sheathed heater 4 (an example of an electric heater) for heating the air ventilated by the electric heating fan 3, and an operation control unit for controlling operation 5 (an example of an operation control unit), and an operation unit 6 that transmits various control information to the operation control unit 5.

  In this embodiment, the sheathed heater 4 is disposed in a ventilation region that is ventilated by the ventilation action of the combustion heating blower 2, and is shared by the combustion heating blower 2 and the electric heating blower 3. 7 is provided.

Hereinafter, description is added about each part of a hybrid type hot air heater. In the following description, in explaining the shape of each member, the positional relationship of each member, etc. using the left, right, front, back, and top and bottom directions, the left, right, front, back, and top and bottom directions are shown in FIGS. It demonstrates as a direction corresponding to each member in each figure.
As shown in FIGS. 1 to 3, in the main body case 10 provided with the air inlet 8 and the hot air outlet 9, the hot air whose upstream side communicates with the air inlet 8 and whose downstream side communicates with the hot air outlet 9. A ventilation path 11 is provided, and a combustion unit U including a gas burner 1 is disposed in the warm air ventilation path 11 so that the combustion gas can be blown out to the warm air ventilation path 11. The main body case 10 is formed in a thin shape with a dimension in the front-rear direction smaller than the dimension in the left-right direction, the hot air outlet 9 is provided in the lower front portion of the main body case 10, and the air inlet 8 is formed in the main body case 10. It is provided at a position above the upper edge of the hot air outlet 9 in the height direction on the rear surface. The air inlet 24 is provided with an air filter 24 for capturing dust.

  The combustion unit U includes a gas burner 1 and a combustion chamber 12 for burning fuel gas ejected from a flame hole 1 h of the gas burner 1. The gas burner 1 is of a Bunsen combustion type, and a gas nozzle 1n that ejects fuel gas supplied through the fuel supply passage 15 is ejected, and fuel gas is ejected from the gas nozzle 1n, and at the same time, suction is accompanied by the ejection of the fuel gas. It is configured to include a mixing pipe 1p to which combustion air is supplied, a gas burner body 1m having a plurality of flame holes 1h for ejecting the air-fuel mixture supplied from the mixing pipe 1p, and the like. The gas burner main body 1m is formed in a long and narrow shape in the left-right direction, and is connected in a communicating state above the mixing pipe 1p so that the air-fuel mixture is supplied from the mixing pipe 1p to the internal space. A plurality of flame holes 1h are formed in a row along the left-right direction on the upper surface portion of 1 m.

  In this embodiment, the combustion chamber 12 includes a lower combustion chamber 12A having a lower air intake 13A on the lower side and a lower combustion gas outlet 14A on the upper side, an upper air intake 13B on the lower side, and An upper combustion chamber 12B provided with an upper combustion gas outlet 14B above is provided side by side in the vertical direction with the lower combustion gas outlet 14A facing the upper combustion chamber 12B. Then, in the lower combustion chamber 12A, the fuel gas ejected from the flame hole 1h of the gas burner 1 is primarily burned by the secondary combustion air introduced from the lower air inlet 13A, and in the upper combustion chamber 12B, the lower gas is used. The unburned fuel gas introduced together with the combustion gas from the combustion gas outlet 14A is subjected to secondary combustion with the secondary combustion air introduced from the upper stage air intake 13B. It is configured as a staged combustion type.

  The upper combustion chamber forming body 16 that forms the upper combustion chamber 12B in the inside is configured as a box having a thin shape in which the dimension in the front-rear direction is smaller than the dimension in the left-right direction, and a rectangular cross-sectional shape that is long in the left-right direction. In the lower part of the rear surface, there is provided an elongated communication opening 17 that is elongated in the left-right direction and facing rearward, and in the upper surface part, an elongated upper combustion gas outlet 14B that is elongated in the left-right direction is provided. The bottom of the upper combustion chamber forming body 16 has a vertical cross-sectional shape when viewed in the left-right direction, and is configured to have a generally V-shaped bowl shape.

  The lower combustion chamber forming body 18 that forms the lower combustion chamber 12 </ b> A inside has an elongated shape that is the same as the upper combustion chamber forming body 16 in the left-right direction and smaller in dimension and height in the front-rear direction than the upper combustion chamber forming body 16. A rectangular (long in the left-right direction) gas burner insertion hole 19 into which the gas burner body 1m of the gas burner 1 is inserted into the lower surface portion of the lower combustion chamber forming body 18; Elongated (long in the left-right direction) lower air inlets 13A positioned in the front and rear of the gas burner insertion hole 19 are provided, and the upper (longer in the left-right direction) lower-stage combustion gas blowing is provided on the upper surface. An outlet 14A is provided. The gas burner 1 is supported by the lower combustion chamber forming body 18 in a state where the gas burner main body 1m is inserted into the gas burner insertion hole 19 in a posture in which the arrangement direction of the flame holes 1h is along the left-right direction.

  Inside the upper combustion chamber forming body 16, the lower combustion chamber forming body 18 that supports the gas burner 1 and is positioned slightly above the communication opening 17 and approximately in the center in the front-rear direction has a longitudinal direction thereof. The upper combustion chamber forming body 16 is arranged in a posture along the longitudinal direction. A region extending forward, upward, and rearward of the lower combustion chamber forming body 18 inside the upper combustion chamber forming body 16 is defined as an upper combustion chamber 12B, and the inner surface of the front wall portion of the upper combustion chamber forming body 16 and the lower combustion chamber. An elongated (long in the left-right direction) opening formed at the lower end edge of the front wall portion of the forming body 18, and the inner surface of the rear wall portion of the upper combustion chamber forming body 16 and the rear of the lower combustion chamber forming body 18 Each elongated (long in the left-right direction) opening formed at the lower edge of the wall portion is used as the upper air inlet 13B.

  The combustion unit U configured as described above is disposed inside the main body case 10 with the communication opening 17 facing the lower middle portion of the intake port 8 in the vertical direction. In the main body case 10, a ventilation path forming body 20 that forms a warm air ventilation path 11 extends forward from the upper edge of the intake port 8 so as to cover the upper side of the combustion unit U, bends downward, and further burns. It extends downward in a state of covering the front of the unit U, and is provided in a form that continues to the upper edge of the hot air outlet 9. Then, the warm air ventilation path 11 is partitioned by the ventilation path forming body 20 so as to extend forward in the upper direction of the combustion unit U and bend downward, and further extend downward in the forward direction of the combustion unit U.

  Further, the flow dividing plate 21 having a mountain-like vertical cross-sectional shape when viewed in the left-right direction divides the warm air ventilation path 11 between the combustion unit U and the ventilation path forming body 20 into two in the vertical direction. The main body case 10 is provided in a state where the main body case 10 is positioned.

  The common blower 7 is configured by a cross flow fan including a blade body 7f that sucks and blows air in a direction orthogonal to the rotation axis, and a fan drive motor 7m that rotates the blade body 7f with the rotation axis. Has been. In the main body case 10, a fan case 22 that accommodates the blade body 7 f of the blower 7 is provided across the lower end edge of the air inlet 8 and the lower end edge of the hot air outlet 9. The fan case 22 has an elongated bowl shape whose longitudinal cross-sectional shape when viewed in the left-right direction is substantially semicircular, and is provided with a plate-like edge portion 22e extending radially outward on the rear side thereof.

  With such a fan case 22 in a posture in which the longitudinal direction is along the left-right direction, the lower end portion of the ventilation path forming body 20 and the lower end portion of the upper combustion chamber forming body 16 are directed with its opening portion obliquely upward and forward. The rear end edge (the end edge of the plate-like edge portion 22e) is connected to the lower end edge of the intake port 8 and the front end edge is connected to the warm air outlet 9 in a posture opposed to the obliquely downward and rearward opening formed by The lower end edge of the main body case 10 is provided in a connected state. The intake port 8 is connected to the lower combustion chamber 12 </ b> A and the upper stage by the rear-side backward plate-like part of the bowl-shaped bottom part of the upper combustion chamber forming body 16 and the plate-like edge part 22 e on the rear side of the fan case 22. A bypass air passage 23 that bypasses the combustion chamber 12B and communicates with the hot air passage 11 is configured.

  The blade body 7f of the common blower 7 is rotatably supported in a state where the rotation axis is positioned in the fan case 22 along the left-right direction. Then, by rotating and driving the blade body 7f by the fan driving motor 7m, the suction action of the shared blower 7 acts on the downstream side of the warm air ventilation path 11 and also acts on the bypass air path 23. It is configured.

  The sheathed heater 4 is bent into a U-shape in which two linear portions 4p are provided in parallel, and the U-shaped sheathed heater 4 follows the longitudinal direction of each linear portion 4p in the left-right direction. In such a posture, the air is disposed in the air flow area between the rear wall portion of the upper combustion chamber forming body 16 and the rear wall portion of the lower combustion chamber forming body 18 in the upper combustion chamber 12B.

Next, a combustion mode of the two-stage combustion type gas burner 1 and a hot air generation mode by the gas burner 1 will be described.
By operating the common blower 7, the suction air acts on the intake port 8 and the upper combustion gas outlet 14B through the warm air passage 11, and the upper combustion gas outlet 14B, the upper combustion chamber 12B, and the upper air inlet. 13B and the suction opening 8 through the communication opening 17, and the upper combustion gas outlet 14B, the upper combustion chamber 12B, the lower combustion gas outlet 14A, the lower combustion chamber 12A, and the lower air inlet The suction action is applied to the intake port 8 through 13 </ b> A and the communication opening 17, and the suction action is performed to the intake port 8 through the bypass air passage 23. Then, the air taken in from the intake port 8 is directly introduced into the upstream end of the warm air ventilation path 11, and is also introduced into the lower combustion chamber 12 </ b> A from the lower air intake 13 </ b> A via the communication opening 17. While being introduced as secondary combustion air, it is introduced as secondary combustion air from the upper stage air intake 13B into the upper stage combustion chamber 12B, and further passes through the bypass air passage 23 and passes through the lower stage combustion chamber 12A and the upper stage. It bypasses the combustion chamber 12B and is introduced into the hot air ventilation path 11.

  The air-fuel mixture ejected from the plurality of flame holes 1h of the gas burner 1 undergoes primary combustion in the lower combustion chamber 12 by the secondary combustion air introduced from the lower air inlet 13A, thereby forming a primary flame Fa. Further, the combustion gas from the primary combustion and the unburned fuel gas in the primary combustion are blown into the upper combustion chamber 12B from the lower combustion gas outlet 14A, and the unburned fuel in the upper combustion chamber 12B. The gas undergoes secondary combustion by the secondary combustion air introduced from the upper air intake port 13B, thereby forming a secondary flame Fb. Then, the combustion gas due to the primary combustion and the combustion gas due to the secondary combustion are blown out from the upper stage combustion gas outlet 14B to the warm air ventilation path 11 and introduced directly from the intake port 8 to the upstream end of the warm air ventilation path 11. The warm air is mixed with the air to generate hot air, and the warm air passes through the warm air ventilation path 11. The air directly taken in from the intake port 8 through the bypass air path 23 is mixed in the middle of the warm air blowing outlet 9. It is blown out of the main body case 10.

  Further, by operating the sheathed heater 4, the air flowing through the upper combustion chamber 12B is heated. That is, the inside of the upper combustion chamber 12B is a ventilation region that is ventilated by the ventilation action of the common blower 7 as the combustion heating blower 2, and the sheathed heater 4 is arranged in such a ventilation region.

Next, the form of warm air generated by the sheathed heater 4 will be described.
By operating the common blower 7, the suction action is applied to the intake port 8 and the upper combustion gas outlet 14 </ b> B through the hot air ventilation path 11 in the same manner as described above for the generation mode of the hot air by the gas burner 1. The upper stage combustion gas outlet 14B, the upper stage combustion chamber 12B, the upper stage air intake 13B, and the communication opening 17 are sucked into the intake port 8, and the upper stage combustion gas outlet 14B, the upper stage combustion chamber. 12B, the lower combustion gas outlet 14A, the lower combustion chamber 12A, the lower air inlet 13A, and the communication opening 17 are sucked into the intake port 8 and sucked into the intake port 8 through the bypass air passage 23. Works.
Then, the air taken in from the intake port 8 is introduced into the upper combustion chamber 12B from the upper air intake port 13B through the communication opening 17 and heated by the sheathed heater 4, and then the lower combustion is performed. The air mixed with the air blown from the gas outlet 14A, blown from the upper combustion gas outlet 14B to the hot air ventilation path 11, and directly introduced from the intake port 8 to the upstream end of the hot air ventilation path 11; The hot air is mixed and generated, and the hot air passes through the hot air ventilation passage 11 and the air taken directly from the intake port 8 through the bypass air passage 23 is mixed along the way, while the hot air blow-out port 9 is used for mixing. 10 is blown out.

  As shown in FIG. 2, a room temperature sensor 25 (an example of a temperature measuring unit of the present invention) that detects the temperature of air sucked from the air inlet 8 as a room temperature is provided in the main body case 10. In order to prevent overheating of the hybrid warm air heater, a ventilation path temperature sensor 26 is provided on the outer surface of the ventilation path forming body 20 so that the temperature in the warm air ventilation path 11 can be detected. A thermal fuse 27 is provided so that it can be heated by heat transfer. As shown in FIG. 3, a flame sensor 28 that detects a flame (primary flame Fa) formed by the gas burner 1 is provided.

  Further, as shown in FIG. 3, the fuel supply passage 15 has a fuel intermittent valve 29 for intermittently supplying the fuel gas to the gas burner 1, and a fuel adjustment for adjusting the supply amount of the fuel gas to the gas burner 1. A valve 30 is provided. Incidentally, the fuel intermittent valve 29 is configured by an electromagnetic valve, and the fuel adjustment valve 30 is configured by a proportional electromagnetic valve. An igniter 31 for igniting the gas burner 1 is provided in the upper vicinity of the gas burner main body 1m of the gas burner 1.

  As shown in FIG. 1, the operation part 6 is provided in the upper surface of the main body case 10, and as shown in FIG. 4, the operation part 6 is commanded to start and stop the operation of the hybrid hot air heater. The main operation switch 41, a good night timer switch 42 that sets a good night timer operation that stops operation when the stop time condition is satisfied, and a good morning timer switch 43 that sets a good morning timer operation that starts operation when the start time condition is satisfied The electric heater operation switch 44 for instructing the start and stop of heating by the electric heating unit He (hereinafter sometimes referred to as “electric heating operation”), and the heater output that is the output of the sheathed heater 4 in a plurality of stages (this implementation) In the form, the heater output changeover switch 45 that can be set in two steps (strong and weak), the target temperature of the heating operation, the sleep timer Good night timer time for executing operation, temperature / time setting switch 46 for setting time interval until the start of good morning timer operation, and hybrid for simultaneously operating both the combustion heating unit Hf and the electric heating unit He The hybrid switch 47 that permits the operation of the heating system, the eco switch (an example of the suppression instruction receiving means of the present invention) 48 that receives an instruction to suppress the electric heating output of the electric heating unit He from the user, and the like are provided.

  Further, the operation unit 6 is lit during operation of the hybrid hot air heater, a sleep timer lamp 52 that is lit during the setting of the sleep timer operation, and lit during the setting of the good morning timer operation. Good morning timer lamp 53, heater operation lamp 54 that is turned on during the electric heating operation, heater output lamp 55 that displays the heater output set by heater output changeover switch 45, and temperature / time setting switch 46 The temperature / time display unit 56 for displaying the set temperature and time, the hybrid lamp 57 that is turned on when the hybrid heating operation is permitted, and the eco switch 48 that is turned on. An eco lamp 58 and the like are provided.

  The user can set the target temperature of the heating operation by pressing and operating the temperature / time setting switch 46. For example, the user can set the temperature from 12 ° C. to 26 ° C. as the target temperature in increments of 1 ° C. In addition, the user can set “L (low)” as a setting state corresponding to a setting temperature lower than 12 ° C., and “H (high)” as a setting state corresponding to a setting temperature higher than 26 ° C. Can be set. For example, when “L (low)” is set, the target temperature for heating operation is a low temperature such as 10 ° C., and when “H (high)” is set, the target temperature for heating operation is 40 ° C. It becomes high temperature.

Next, the control operation of the operation control unit 5 will be described.
As shown in FIG. 5, the operation control unit 5 includes a main operation switch 41, a good night timer switch 42, a good morning timer switch 43, an electric heater operation switch 44, a heater output changeover switch 45, a temperature / time setting switch 46, a hybrid switch. 47, command information from various switches such as the eco switch 48, and detection information of various sensors such as the room temperature sensor 25, the ventilation path temperature sensor 26, and the flame sensor 28 are input.

  Based on the command information from the various switches and the detection information of the various sensors, the operation control unit 5 includes the sheathed heater 4, the igniter 31, the fan driving motor 7m, the fuel intermittent valve 29, the fuel adjustment valve 30, and the like. Various devices, operation lamp 51, good night timer lamp 52, good morning timer lamp 53, heater operation lamp 54 and heater output lamp 55, various lamps such as hybrid lamp 57, eco lamp 58, and operation of temperature / time display unit 56, etc. By controlling, it is configured to control the operation of the hybrid hot air heater.

Specifically, the operation control unit 5 includes a gas combustion type heating operation by operating the combustion type heating unit Hf, an electric type heating operation by operating the electric type heating unit He, the combustion type heating unit Hf, and the electric type. Various operations such as hybrid heating operation that allows simultaneous operation of the heating unit He, good night timer operation that stops operation when the stop time condition is satisfied, and good morning timer operation that starts operation when the start time condition is satisfied Alternatively, it is configured to be executable.
Further, the operation control unit 5 stops the combustion of the gas burner 1 when the time for continuously burning the gas burner 1 reaches a predetermined allowable continuous combustion operation time in each of the good night timer operation and the good morning timer operation. It is configured. Incidentally, the allowable continuous combustion operation time is set to an upper limit time during which the combustion heating unit Hf can be operated safely and safely without ventilating the space to be heated. In this embodiment, for example, the allowable continuous combustion operation time is set to 60 minutes.

  Hereinafter, each operation of the combustion heating operation, the electric heating operation, and the hybrid heating operation will be described.

[Combustion heating operation]
When the start of operation is commanded by the main operation switch 41, the operation control unit 5 operates the fan driving motor 7m, opens the fuel intermittent valve 29 and the fuel adjustment valve 30, and sets the igniter 31. By performing the ignition process to be operated and burning the gas burner 1, a gas combustion heating operation in which hot air generated by the combustion gas of the gas burner 1 is blown into the room is started, and the operation lamp 51 is turned on.
The operation control unit 5 adjusts the opening of the fuel adjustment valve 30 so that the temperature detected by the room temperature sensor 25 becomes the target temperature set by the temperature / time setting switch 46 during execution of the gas combustion heating operation. Then, the combustion control for adjusting the combustion amount of the gas burner 1 is executed.

When the main operation switch 41 is pushed again and the operation stop command is issued during execution of the gas combustion heating operation, the operation control unit 5 closes the fuel intermittent valve 29 and the fuel adjustment valve 30 and A fire extinguishing process for stopping the driving motor 7m is executed to extinguish the gas burner 1, thereby stopping the gas combustion heating operation and turning off the operation lamp 51.
In addition, the operation control unit 5 activates the forgetting-to-extinguish timer with the start of the gas-fired heating operation, and when the forgetting-off timer expires, executes the fire extinguishing process and stops the gas-combusting heating operation. . The forgetting-off timer can be set to 3 hours, 5 hours, or 8 hours by the temperature / time setting switch 46.
The operation control unit 5 determines that the temperature detected by the ventilation path temperature sensor 26 is equal to or higher than a preset temperature for preventing overheating during the gas combustion heating operation, or the flame sensor 28 causes the gas burner 1 to disappear. Is detected, the fire extinguishing process is executed to stop the gas combustion heating operation.

[Electric heating operation]
When the start of the electric heating operation is instructed by the electric heater operation switch 44, the operation control unit 5 starts the electric heating operation by operating the fan driving motor 7m and the sheathed heater 4, and the heater operation. The lamp 54 is turned on.
Further, when the heater output changeover switch 45 is repeatedly pressed, the operation control unit 5 responds to weak heater output as the heater output changeover switch 45 is pressed from the state where all the heater output lamps 55 are turned off. The control state of the heater output lamp 55 is sequentially changed to a state where the heater output lamp 55 is turned on, a state where the heater output lamp 55 corresponding to a strong heater output is turned on, and a state where all the heater output lamps 55 are turned off.

Then, the operation control unit 5 sets the target temperature set by the temperature / time setting switch 46 in the state where all the heater output lamps 55 are turned off during execution of the electric heating operation. By performing the heater output control for adjusting the output of the sheathed heater 4 so as to reach the temperature, the electric heating operation is executed in the temperature adjustment mode.
In addition, when the heater output lamp 55 corresponding to one of the weak and strong heater outputs is lit during the execution of the electric heating operation, the operation control unit 5 sets the lit heater output lamp 55 to the lit heater output lamp 55. By executing the heater output control for operating the sheathed heater 4 with the corresponding heater output, the electric heating operation is executed in the constant output mode.

When the electric heater operation switch 44 is pushed again during the execution of the electric heating operation in the temperature adjustment mode or the constant output mode and the stop of the electric heating operation is instructed, the operation control unit 5 The operation of the fan driving motor 7m is stopped, and the electric heating operation is stopped.
Further, the operation control unit 5 activates the forgetting-off prevention timer with the start of the electric heating operation. When the forgetting-off prevention timer expires, the operation control unit 5 stops the operation of the sheathed heater 4 and the fan driving motor 7m. Stop electric heating operation.
The operation control unit 5 stops the operation of the sheathed heater 4 and the fan driving motor 7m when the detected temperature of the ventilation path temperature sensor 26 becomes equal to or higher than the set temperature for overheating prevention during the electric heating operation. Stop electric heating operation.

That is, the operation control unit 5 uses the temperature adjustment mode in which the output of the sheathed heater 4 is adjusted so that the detected temperature of the room temperature sensor 25 that detects the room temperature becomes the target temperature, or the sheathed heater 4 is heated as the heater. In other words, it is configured so that it can be operated alternatively in a constant output mode in which it is operated with the heater output set by the output changeover switch 45.
The heater output changeover switch 45 is configured so that the heater output can be set in a plurality of stages (in this embodiment, two stages of strong and weak).

[Hybrid heating operation]
The operation control unit 5 starts the hybrid heating operation when the main operation switch 41 instructs to start the operation in a state where the hybrid switch 47 is turned on and the operation of the hybrid heating is permitted. At this time, the operation control unit 5 operates the fan drive motor 7m, opens the fuel on / off valve 29 and the fuel adjustment valve 30, and executes an ignition process for operating the igniter 31 to perform the gas burner. By burning 1, a gas combustion heating operation in which warm air generated by the combustion gas of the gas burner 1 is blown into the room is started, and the operation lamp 51 is turned on. In addition, the operation control unit 5 activates the sheathed heater 4 to start the electric heating operation and turns on the heater operation lamp 54.

  In the hybrid heating using the combustion heating unit Hf and the electric heating unit He in combination, the operation control unit 5 measures the room temperature sensor 25 so that the temperature of the air measured by the room temperature sensor 25 becomes a predetermined target temperature. Based on the temperature difference between the air temperature and the target temperature, an output determination process for determining the target heating output of the heating means H from between the minimum heating output and the maximum heating output is performed, and the target heating output determined in the output determination process The heating means H is operated so that

  In the present embodiment, as shown in Table 1 below, the heating output of the heating means H is adjusted to an output at any stage between the first stage (0.52 kW) and the tenth stage (3.64 kW). Is done. Specifically, the operation control unit 5 determines a predetermined heating output of the heating means H between a minimum heating output (first stage: 0.52 kW) and a maximum heating output (10th stage: 3.64 kW). When the intermediate heating output (7th stage: 2.44 kW) or less, the sheathed heater 4 of the electric heating unit He does not operate, and the gas burner 1 of the combustion heating unit Hf has the lowest combustion heating output (0.52 kW). ) And the maximum combustion heating output (2.44 kW), the heating means H is operated in a state of operating so as to exhibit a predetermined combustion heating output. On the other hand, when the target heating output of the heating means H is larger than the midway heating output (7th stage: 2.44 kW), the operation control unit 5 determines that the gas burner 1 of the combustion heating unit Hf has the highest combustion heating output. (2.44 kW) is exerted, and the sheathed heater 4 of the electric heating unit He has a predetermined value between the minimum electric heating output (0.40 kW) and the maximum electric heating output (1.20 kW). The heating means H is operated in a state where it operates so as to exhibit electric heating output.

  The combustion heating output of the gas burner 1 of the combustion heating unit Hf can be changed by adjusting the amount of fuel gas supplied to the gas burner 1 per unit time. The operation control unit 5 stores the amount of fuel supplied corresponding to each combustion heating output, and adjusts the valve opening of the fuel adjustment valve 30 to the opening corresponding to the amount of fuel supplied to the gas burner 1. The amount of fuel gas supplied per unit time can be adjusted. The electric heating output of the sheathed heater 4 of the electric heating unit He can be changed by adjusting the energization amount to the sheathed heater 4. The operation control unit 5 stores an energization amount corresponding to each electric heating output, and can adjust the energization amount to the sheathed heater 4 by using a semiconductor element such as a triac, for example. In addition, the operation control unit 5 operates the blower 7 with an output corresponding to the heating output of the heating means H.

FIG. 6 is a flowchart for explaining the operation in the hybrid heating according to the first embodiment.
When the operation switch is turned on while the hybrid switch 47 is turned on, the operation control unit 5 determines that the operation of the heating means H in the hybrid heating is instructed. And the operation control part 5 starts operation | movement of the heating means H in process # 10. In this example, in step # 10, the operation control unit 5 starts the operation of the heating means H in a state where the target heating output of the heating means H is set to the maximum heating output (10th stage: 3.64 kW). That is, the operation control unit 5 operates so that the gas burner 1 of the combustion heating unit Hf exhibits the maximum combustion heating output (2.44 kW), and the sheathed heater 4 of the electric heating unit He operates at the maximum electric heating. The heating means H is operated in a state of operating so as to exert an output (1.20 kW). Thereby, the temperature of the space to be heated rises quickly.

Thereafter, in step # 11, the operation control unit 5 determines whether or not the temperature of the air in the heating target space measured by the room temperature sensor 25 has reached the target temperature set by the temperature / time setting switch 46. And the operation control part 5 will perform process # 11 again, if the temperature of the air of heating target space has not yet reached target temperature, and if the temperature of the air of heating target space has reached target temperature, Then, the process proceeds to step # 12.
Thus, in this embodiment, immediately after the operation of the heating unit H starts, the operation control unit 5 sets the target heating output of the heating unit H to the maximum heating output (10 until the temperature of the space to be heated reaches the target temperature. In the state set to the stage: 3.64 kW), the heating means H is operated.

  In step # 12, the operation control means determines whether or not the temperature (room temperature) of the air in the heating target space is higher than “target temperature + 1 ° C.”. Then, when the temperature of the air in the heating target space (room temperature) is equal to or lower than “target temperature + 1 ° C.”, the operation control unit 5 proceeds to step # 14, and the temperature of the air in the heating target space (room temperature) is “target”. When the temperature is higher than “temperature + 1 ° C.”, the process proceeds to step # 13.

In step # 13, the operation control unit 5 performs output determination processing for determining the target heating output of the heating means H. That is, the state in which the temperature of the air in the space to be heated (room temperature) is higher than “target temperature + 1 ° C.” can be regarded as a state in which the heating output of the heating means H is excessive. Therefore, in step # 13, the operation control unit 5 performs adjustment to change the heating output of the heating means H to the decreasing side. Specifically, the operation control unit 5 operates the heating means H using the heating output one step lower than the current heating output of the heating means H as a new target heating output. For example, if the current target heating output of the heating means H is the 10th stage (3.64 kW), the operation control unit 5 then sets the 9th stage (3.24 kW) as the new target heating output. To work. At this time, the operation control unit 5 sets the combustion heating output of the gas burner 1 of the combustion heating unit Hf to 2.44 kW and the electric heating output of the sheathed heater 4 of the electric heating unit He to 0.80 kW. The heating means H is operated.
Thus, in step # 13, the operation control unit 5 performs adjustment to change the heating output of the heating means H to the decreasing side based on the temperature difference between the air temperature measured by the room temperature sensor 25 and the target temperature. Thus, it can be expected that the room temperature of the space to be heated measured by the room temperature sensor 25 approaches the target temperature.

  In step # 14, the operation control unit 5 determines whether or not the temperature (room temperature) of the air in the space to be heated is lower than “target temperature-1 ° C.”. And the operation control part 5 transfers to process # 16, when the temperature (room temperature) of the air of heating object space is "target temperature-1 degreeC" or more, and the temperature (room temperature) of the air of heating object space is " If it is lower than “target temperature-1 ° C.”, the process proceeds to step # 15.

In step # 15, the operation control unit 5 performs output determination processing for determining the target heating output of the heating means H. That is, the state where the temperature of the air in the heating target space (room temperature) is lower than “target temperature-1 ° C.” can be regarded as a state where the heating output of the heating means H is too small. Therefore, in step # 15, the operation control unit 5 performs adjustment to change the heating output of the heating means H to the increasing side. Specifically, the operation control unit 5 operates the heating means H with the heating output one level higher than the current heating output of the heating means H as a new target heating output. For example, if the current target heating output of the heating means H is the eighth stage (2.84 kW), the operation control unit 5 then sets the ninth stage (3.24 kW) as the new target heating output. To work. At this time, the operation control unit 5 sets the combustion heating output of the gas burner 1 of the combustion heating unit Hf to 2.44 kW and the electric heating output of the sheathed heater 4 of the electric heating unit He to 0.80 kW. The heating means H is operated.
Thus, in step # 13, the operation control unit 5 performs adjustment to change the heating output of the heating means H to the increasing side based on the temperature difference between the air temperature measured by the room temperature sensor 25 and the target temperature. Thus, it can be expected that the room temperature of the space to be heated measured by the room temperature sensor 25 approaches the target temperature.

  Next, in step # 16, the operation control unit 5 determines whether or not the operation switch is turned off. And the operation control part 5 transfers to process # 17, and stops the driving | operation of the heating means H, when an operation switch is turned off. On the other hand, if the operation switch is not turned off, the operation control unit 5 continues the operation of the heating means H and proceeds to step # 12.

  As described above, in the hybrid hot air heater of the present embodiment, as shown in Table 1, when the target heating output of the heating means H is between the minimum heating output and the predetermined midway heating output, the combustion type Since only the heating unit Hf operates, an increase in heating cost can be suppressed. On the other hand, when the target heating output of the heating means H is set between the predetermined midway heating output and the maximum heating output, both the combustion heating section Hf and the electric heating section He are operated. Sufficient heating output by H can be secured. Further, when the target heating output of the heating means H is increased, the combustion heating output of the combustion heating unit Hf is preferentially increased until the target heating output becomes the midway heating output, and the target heating output becomes the midway heating output. When it becomes larger, the electric heating output of the electric heating unit He is increased. On the other hand, when the target heating output of the heating means H is reduced, the electric heating output of the electric heating unit He is preferentially decreased until the target heating output becomes the above-described midway heating output, and the target heating output becomes the above-mentioned When the heating output is below the midway heating output, the combustion heating output of the combustion heating unit Hf is decreased. That is, when the target heating output of the heating unit H is increased, the combustion heating output of the combustion heating unit Hf is preferentially increased, and when the target heating output of the heating unit H is decreased, the electric heating output of the electric heating unit He is increased. The combustion heating unit Hf and the electric heating unit He are operated so as to reduce the priority. Therefore, it is possible to provide a hybrid hot air heater that can suppress an increase in heating cost while sufficiently securing the heating output by the heating means H.

Second Embodiment
The hybrid hot-air heater of the second embodiment limits the upper limit of the electric heating output of the electric heating unit He to the highest output during suppression (<highest electric heating output) when the electric heating suppression condition is satisfied. This is different from the above embodiment. Although the hybrid hot air heater of 2nd Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to the said embodiment.

FIG. 7 is a flowchart for explaining the operation in the hybrid heating according to the second embodiment.
When the operation switch is turned on while the hybrid switch 47 is turned on, the operation control unit 5 determines that the operation of the heating means H in the hybrid heating is instructed. And in process # 20, the operation control part 5 performs the 1st output determination process which determines the target heating output of the heating means H. FIG. In the first output determination process, the operation control unit 5 has a predetermined maximum suppression time less than the maximum electric heating output when a predetermined electric heating suppression condition for suppressing the electric heating output of the electric heating unit He is satisfied. The electric heating output of the electric heating unit He is determined with the output as the upper limit.

  In the present embodiment, the electric heating suppression condition is that the temperature of the air measured by the room temperature sensor 25 at the start of operation of the heating means H is equal to or higher than a set temperature. Therefore, in the first output determination process, the operation control unit 5 determines that the temperature of the air measured by the room temperature sensor 25 at the start of the operation of the heating means H is equal to or higher than a set temperature (for example, 15 ° C. or higher). Is determined to be satisfied. That is, if the temperature of the space to be heated is relatively high, the operation control unit 5 limits the upper limit of the electric heating output of the electric heating unit He to the maximum output during suppression (<maximum electric heating output). For example, as shown in Table 1, when the maximum electric heating output of the electric heating unit He is 1.20 kW, the operation control unit 5 determines the electric power of the electric heating unit He when the electric heating suppression condition is satisfied. The upper limit of the heating output is limited to the maximum output during suppression of 0.40 kW. Alternatively, when the electric heating suppression condition is satisfied, the operation control unit 5 limits the upper limit of the electric heating output of the electric heating unit He to the maximum output at the time of suppression of 0 kW and does not operate the electric heating unit He. The heating means H may be operated. Thus, if the temperature of the air measured by the room temperature sensor 25 is higher than the set temperature, the heating output by the heating means H is insufficient even if the output of the electric heating unit He is small. Therefore, even if the time to reach the target temperature is delayed, the effect of reducing the heating cost by reducing the output of the electric heating unit He can be obtained.

  Thereafter, in step # 22, the operation control unit 5 determines whether or not the temperature of the air in the heating target space measured by the room temperature sensor 25 has reached the target temperature set by the temperature / time setting switch 46. And the operation control part 5 will perform process # 22 again, if the temperature of the air of heating object space has not yet reached target temperature, and if the temperature of the air of heating object space has reached target temperature, Then, the process proceeds to step # 23.

  In step # 23, the operation control means determines whether or not the temperature of the air in the heating target space (room temperature) is higher than “target temperature + 1 ° C.”. When the temperature (room temperature) of the air in the heating target space is equal to or lower than the “target temperature + 1 ° C.”, the operation control unit 5 proceeds to step # 25, and the temperature of the air in the heating target space (room temperature) is “target”. If it is higher than “temperature + 1 ° C.”, the process proceeds to step # 24.

  In step # 24, the operation control unit 5 performs a second output determination process for determining the target heating output of the heating means H. That is, the state in which the temperature of the air in the space to be heated (room temperature) is higher than “target temperature + 1 ° C.” can be regarded as a state in which the heating output of the heating means H is excessive. Therefore, in step # 24, the operation control unit 5 performs adjustment to change the heating output of the heating means H to the decreasing side. Specifically, the operation control unit 5 operates the heating means H using the heating output one step lower than the current heating output of the heating means H as a new target heating output. In the second output determination process, similarly to the first output determination process, the operation control unit 5 is the highest when a predetermined electric heating suppression condition for suppressing the electric heating output of the electric heating unit He is satisfied. The electric heating output of the electric heating unit He can be determined with the maximum output at the time of suppression less than the electric heating output as the upper limit.

  In Step # 25, the operation control unit 5 determines whether or not the temperature (room temperature) of the air in the heating target space is lower than “target temperature-1 ° C.”. And the operation control part 5 transfers to process # 27, when the temperature (room temperature) of the air of heating object space is "target temperature-1 degreeC" or more, and the temperature (room temperature) of the air of heating object space is " When the temperature is lower than the “target temperature-1 ° C.”, the process proceeds to step # 26 and the second output determination process is performed.

  Next, in step # 27, the operation control unit 5 determines whether or not the operation switch is turned off. And the operation control part 5 transfers to process # 28, and stops the driving | operation of the heating means H, when an operation switch is turned off. On the other hand, when the operation switch is not turned off, the operation control unit 5 continues the operation of the heating means H and proceeds to step # 23.

<Third Embodiment>
The hybrid warm air heater of the third embodiment is different from the second embodiment in the method of determining the heating output of the heating means H. Although the hybrid hot air heater of 3rd Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to the said embodiment.

FIG. 8 is a flowchart for explaining the operation in the hybrid heating according to the third embodiment.
When the operation switch is turned on while the hybrid switch 47 is turned on, the operation control unit 5 determines that the operation of the heating means H in the hybrid heating is instructed. And in process # 30, the operation control part 5 starts operation | movement of the heating means H. FIG. In this example, in step # 30, the operation control unit 5 starts the operation of the heating means H in a state where the target heating output of the heating means H is set to the maximum heating output (10th stage: 3.64 kW). That is, the operation control unit 5 operates so that the gas burner 1 of the combustion heating unit Hf exhibits the maximum combustion heating output (2.44 kW), and the sheathed heater 4 of the electric heating unit He operates at the maximum electric heating. The heating means H is operated in a state of operating so as to exert an output (1.20 kW). Thereby, the temperature of the space to be heated rises quickly.

  Thereafter, in step # 31, the operation control unit 5 performs a first output determination process for determining the target heating output of the heating means H. In the first output determination process, the operation control unit 5 has a predetermined maximum suppression time less than the maximum electric heating output when a predetermined electric heating suppression condition for suppressing the electric heating output of the electric heating unit He is satisfied. The electric heating output of the electric heating unit He is determined with the output as the upper limit. Specifically, in step # 31, the operation control unit 5 determines that the temperature of the air measured by the room temperature sensor 25 during the operation of the heating means H is equal to or higher than a set temperature (for example, 15 ° C. or higher). Is satisfied and the upper limit of the electric heating output of the electric heating unit He is limited to the maximum output during suppression (<maximum electric heating output). For example, as shown in Table 1, when the maximum electric heating output of the electric heating unit He is 1.20 kW, the operation control unit 5 suppresses the upper limit of the electric heating output of the electric heating unit He to 0.40 kW. Limit to maximum output. Or the operation control part 5 may restrict | limit the upper limit of the electric heating output of the electric heating part He to the maximum output at the time of suppression of 0 kW, and may operate the heating means H in the state which does not operate the electric heating part He. . Thus, the temperature of the space to be heated can be quickly increased at least up to a set temperature (for example, 15 ° C., for example), and thereafter, the temperature of the air measured by the room temperature sensor 25 is high such that the temperature is equal to or higher than the set temperature. If it is a situation, even if the output of the electric heating unit He is small, the heating output by the heating means H will not be insufficient, so even if the time to reach the target temperature is delayed, the electric heating unit He The effect of reducing the heating cost by reducing the output can be obtained.

  Next, in step # 32, the operation control unit 5 determines whether or not the temperature of the air in the heating target space measured by the room temperature sensor 25 has reached the target temperature. And if the temperature of the air of heating object space has not yet reached target temperature, the operation control part 5 will perform process # 32 again, and if the temperature of the air of heating object space has reached target temperature. Then, the process proceeds to step # 33.

  Step # 33 to step # 38 shown in FIG. 8 of the present embodiment are the same as step # 23 to step # 28 shown in FIG. 7 of the second embodiment, and a description thereof will be omitted.

<Fourth embodiment>
The hybrid hot air heater of the fourth embodiment is different from the above embodiment in the contents of the electric heating suppression condition. Although the hybrid hot air heater of 4th Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to the said embodiment.

  In the present embodiment, the electric heating suppression condition is that the temperature difference between the air temperature measured by the room temperature sensor 25 at the start of the operation of the heating means H and the target temperature is equal to or less than the set temperature difference. Specifically, in the first output determination process described in the second embodiment, the operation control unit 5 determines that the temperature difference between the temperature of the air measured by the room temperature sensor 25 and the target temperature at the start of the operation of the heating unit H is the target temperature. If it is equal to or less than the set temperature difference (for example, 5 ° C. or less), it is determined that the electric heating suppression condition is satisfied. That is, if the temperature of the space to be heated is close to the target temperature to some extent, the operation control unit 5 limits the upper limit of the electric heating output of the electric heating unit He to the highest output during suppression (<highest electric heating output).

<Fifth Embodiment>
The hybrid hot air heater of the fifth embodiment is different from the above embodiment in the contents of the electric heating suppression condition. The hybrid hot air heater of the fifth embodiment will be described below, but the description of the same configuration as that of the above embodiment will be omitted.

  In the present embodiment, the electric heating suppression condition is that the temperature difference between the air temperature measured by the room temperature sensor 25 during the operation of the heating means H and the target temperature is equal to or less than the set temperature difference. Specifically, the operation control unit 5 includes heating means in the second output determination process described in the second embodiment, and the first output determination process and the second output determination process described in the third embodiment. When the temperature difference between the temperature of the air measured by the room temperature sensor 25 and the target temperature during the operation of H is equal to or less than the set temperature difference (for example, 5 ° C. or less), it is determined that the electric heating suppression condition is satisfied. That is, if the temperature of the space to be heated is close to the target temperature to some extent, the operation control unit 5 limits the upper limit of the electric heating output of the electric heating unit He to the highest output during suppression (<highest electric heating output).

<Sixth Embodiment>
The hybrid hot air heater of the sixth embodiment is different from the above embodiment in the contents of the electric heating suppression condition. Although the hybrid hot air heater of 6th Embodiment is demonstrated below, description is abbreviate | omitted about the structure similar to the said embodiment.

  In the present embodiment, the eco switch 48 functions as a suppression instruction receiving unit that receives an instruction to suppress the electric heating output of the electric heating unit He from the user. Then, the operation control unit 5 determines that the eco-switch 48 has been turned on in the output determination process (including the first output determination process and the second output determination process). This is regarded as a desire to reduce costs. Therefore, when the eco switch 48 receives an instruction to suppress the electric heating output of the electric heating unit He from the user, the operation control unit 5 determines that the electric heating suppression condition is satisfied, and Similarly, the electric heating output of the electric heating unit He is determined with the maximum output at the time of suppression less than the maximum electric heating output as the upper limit.

<Another embodiment>
<1>
In the said embodiment, although the specific example was given and demonstrated about the structure of the hybrid type hot air heater of this invention, the structure can be changed suitably.
In the above-described embodiment, an example in which the gas burner 1 that burns fuel gas is used as the burner of the combustion heating unit Hf has been described. However, a burner that uses liquid fuel such as petroleum as fuel may be used. In the above embodiment, the sheathed heater 4 has been described as a specific example of the electric heater. However, various heaters such as a nichrome wire heater, a quartz tube heater, a ceramic heater, and a carbon heater may be used.
In addition, the installation position of the sheathed heater 4 of the electric heating unit He is not limited to the position described in the above embodiment, and may be, for example, in the warm air passage 11 or the bypass air passage 23.
Furthermore, although the said embodiment demonstrated the example which provides the common blower 7 shared by the combustion type air blower 2 and the electric type air blower 3, the combustion type air blower 2 and the electric type air heating fan 3 May be arranged separately, and the sheathed heater 4 may be arranged in a ventilation region ventilated by the ventilation action of the electric heating blower 3.

<2>
In the above embodiment, the maximum output value at the time of suppression may be variably set according to the temperature.
Specifically, the maximum output during suppression may be set to a smaller value as the temperature of the air measured by the room temperature sensor 25 at the start or during the operation of the heating means H is increased. For example, the first set temperature is 15 ° C., the second set temperature is 18 ° C., and the third set temperature is 20 ° C. The operation control unit 5 sets the upper limit of the electric heating output of the electric heating unit He to the maximum electric heating output (1.20 kW) when the room temperature is less than 15 ° C. (less than the first set temperature), and the room temperature is 15 ° C. or more and 18 If it is less than 1 ° C. (1st set temperature or more and less than 2nd set temperature), the upper limit of the electric heating output of the electric heating unit He is set to the maximum output during suppression (0.80 kW), and the room temperature is 18 ° C. or more and less than 20 ° C. (2nd setting) The upper limit of the electric heating output of the electric heating unit He is set to the maximum output (0.40 kW) at the time of suppression when the temperature is equal to or higher than the third set temperature, and the electric heating unit He is set when the room temperature is 20 ° C. or higher (third set temperature or higher). The upper limit of the electric heating output may be set to the maximum output (0 kW) at the time of suppression. The higher the temperature of the air measured by the room temperature sensor 25, the smaller the heating output required for the heating means H. Therefore, even if the maximum output of the electric heating unit He (suppressed maximum output) is set to a small value, Sufficient heating output by the heating means H can be secured. As a result, the effect of reducing the heating cost by reducing the output of the electric heating unit He can be greatly obtained.

  Alternatively, the maximum output during suppression may be set to a smaller value as the temperature difference between the room temperature and the target temperature of the space to be heated which is measured by the room temperature sensor 25 at the start or during the operation of the heating means H is smaller. For example, the first set temperature difference is 7 ° C., the second set temperature difference is 5 ° C., and the third set temperature difference is 2 ° C. The operation control unit 5 sets the upper limit of the electric heating output of the electric heating unit He to the maximum electric heating output (1.20 kW) when the temperature difference between the room temperature and the target temperature is 7 ° C. or more (first setting temperature difference or more). When the temperature difference between the room temperature and the target temperature is less than 7 ° C. and 5 ° C. or more (less than the first set temperature difference and the second set temperature difference or more), the upper limit of the electric heating output of the electric heating unit He is suppressed to the maximum output (0 .80 kW), and when the temperature difference between the room temperature and the target temperature is less than 5 ° C and 2 ° C or more (less than the second set temperature difference and the third set temperature or more), the upper limit of the electric heating output of the electric heating unit He is suppressed. (0.40 kW), and if the temperature difference between the room temperature and the target temperature is less than 2 ° C. (less than the third set temperature difference), the upper limit of the electric heating output of the electric heating unit He may be set to the maximum output during suppression (0 kW). . The smaller the temperature difference between the room temperature of the space to be heated measured by the room temperature sensor 25 and the target temperature set by the temperature / time setting switch 46, the smaller the heating output required for the heating means. Even if the maximum output of the part He (maximum output during suppression) is set to a small value, the heating output by the heating means H can be sufficiently secured. As a result, the effect of reducing the heating cost by reducing the output of the electric heating unit He can be greatly obtained.

<3>
In the said embodiment, when the operation control part 5 has set the target temperature of heating operation as "H (high)" at the time of the operation | movement start of the heating means H, the electric heating part He is not operated, or You may perform electric heating suppression operation, such as making it stop when exceeding regulation time (for example, 30 minutes etc.). When such an electric heating suppression operation is performed, even if the target temperature of the heating operation is set to “H (high)”, the electric heating unit He will not operate for a long time. This is in order to prevent the running cost in the type heating from increasing.

<4>
The configurations disclosed in the above-described embodiments (including the other embodiments, the same applies hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as no contradiction arises, and are disclosed in this specification. The embodiment is an exemplification, and the embodiment of the present invention is not limited to this, and can be appropriately modified without departing from the object of the present invention.

  INDUSTRIAL APPLICABILITY The present invention can be used for a hybrid hot air heater that can suppress an increase in heating cost while sufficiently securing a heating output by a heating means.

1 Gas burner (burner)
2 Combustion heating fan 3 Electric heating fan 4 Seeds heater (electric heater)
5 Operation control unit (operation control means)
7 Common fan 25 Room temperature sensor (Temperature measuring means)
H Heating means He Electric heating part Hf Combustion heating part

Claims (7)

A burner that burns fuel gas; and a combustion heating fan that takes in air in the space to be heated, mixes the introduced air and the combustion gas in the burner, and blows the air into the space to be heated. Combustion-type heating unit and an electric heating fan that takes in air in the space to be heated and blows the introduced air into the space to be heated, and air that is ventilated by the electric heating fan A heating means having an electric heating part having an electric heater for heating
Temperature measuring means for measuring the temperature of the space to be heated, and
A hybrid hot air heater provided with an operation control means for controlling operation,
In the hybrid mode in which the combustion heating unit and the electric heating unit are used together, the operation control unit measures the temperature measurement unit so that the temperature of the air measured by the temperature measurement unit becomes a predetermined target temperature. Based on the temperature difference between the temperature of the air to be performed and the target temperature, an output determination process for determining the target heating output of the heating means between the minimum heating output and the maximum heating output is performed and determined in the output determination process Operating the heating means to exert the target heating output;
The operation control means in the output determination process,
When the target heating output of the heating means is equal to or lower than a predetermined midway heating output between the lowest heating output and the highest heating output, the electric heating unit does not operate and the combustion heating unit is the lowest Operating the heating means in a state of operating to exert a predetermined combustion heating output between the combustion heating output and the maximum combustion heating output;
When the target heating output of the heating means is larger than the midway heating output, the combustion heating unit operates to exhibit the maximum combustion heating output, and the electric heating unit has a minimum electric heating output and a maximum A hybrid hot air heater that operates the heating means in a state of operating so as to exhibit a predetermined electric heating output between the electric heating output.   In the output determination process, when the predetermined electric heating suppression condition for suppressing the electric heating output of the electric heating unit is satisfied in the output determination process, the operation control means has a predetermined maximum suppression time less than the maximum electric heating output. The hybrid hot air heater according to claim 1, wherein the electric heating output of the electric heating unit is determined with an output as an upper limit.   In the output determination process, when the temperature of the air measured by the temperature measurement unit is equal to or higher than a set temperature in the output determination process, the operation control unit satisfies the electric heating suppression condition. The hybrid hot air heater according to claim 2 for determination.   The hybrid hot-air heater according to claim 3, wherein the maximum output during suppression is set to a smaller value as the temperature of the air measured by the temperature measurement means is higher when the heating means starts operating or during operation.   The operation control means, in the output determination processing, when the temperature difference between the temperature of the air measured by the temperature measurement means and the target temperature is less than or equal to a set temperature difference at the start of operation of the heating means or during operation thereof, The hybrid hot air heater according to any one of claims 2 to 4, wherein it is determined that the electric heating suppression condition is satisfied.   The maximum output at the time of suppression is set to a smaller value as the temperature difference between the air temperature measured by the temperature measuring unit and the target temperature is smaller at the start or during operation of the heating unit. Hybrid hot air heater. Comprising suppression instruction receiving means for receiving an instruction to suppress the electric heating output of the electric heating unit from a user;
In the output determination process, the operation control unit is configured such that the electric heating suppression condition is satisfied when the suppression instruction receiving unit receives an instruction to suppress the electric heating output of the electric heating unit from a user. The hybrid hot air heater according to any one of claims 2 to 5, which is determined.

Images