JP5742546B2 - Heating device - Google Patents

Description

  The present invention relates to a heating device that provides a heating temperature for heating a predetermined object in a container using a main heating device and an auxiliary heating device.

  An apparatus described in Patent Document 1 is known as a conventional heating apparatus that provides warm heat for heating a predetermined object in a furnace. The apparatus described in Patent Document 1 takes in a dry gas that has been temperature-controlled in advance by a heat pump unit or a temperature raising device, and dries the object to be processed inside a dryer that accommodates the object to be dried. . For example, the temperature-controlled dry gas is heated to 90 ° C. by the heat pump unit, further heated to 120 ° C. by the temperature raising device, and sent into the dryer from the air supply port. The drying gas whose temperature is adjusted in advance in this way is taken in from the air supply port located in the lower part inside the dryer, flows toward the exhaust port opening in the upper part, and is discharged from the exhaust port to the outside of the dryer. . For this reason, the dry gas temperature-controlled beforehand is supplied toward the to-be-processed object arrange | positioned on a ventilation board from a lower air supply port, and heats to-be-processed object directly.

JP 2011-21778 A

  As a device for drying an object to be processed inside the dryer, a method of adjusting the temperature of the dry gas inside the dryer is adopted instead of the configuration in which the temperature of the dry gas is controlled in advance outside the dryer as in Patent Document 1 above. Can do. When adopting this type of equipment, how efficiently the thermal fluid can be supplied to the workpiece and how much energy required for the thermal supply can be suppressed is the required performance of the equipment. Very important.

  Therefore, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a thermal apparatus capable of efficiently supplying hot air to a target object and suppressing energy consumption for the supply of the heat. I will provide a.

In order to achieve the above object, the following technical means are adopted. That is, claim 1 is an invention relating to a thermal apparatus (100) for performing thermal heat treatment for warming a predetermined target object (27) disposed in a container (20),
The heat pump heating device (1) that generates air having a temperature lower than the temperature of the hot air necessary for the heat treatment, and the hot air necessary for the heat treatment by heating the air present in the container in which the target object is placed A main heating device (22) to be generated and a blower device (21) for forming an air flow through which hot air heated by the main heating device is circulated in the container, and for sucking air generated by the heat pump heating device into the container And a discharge port (28) formed when the air in the container is discharged to the outside as the air is sucked into the container by the blower device, and the blower device sucks the air into the container. A windshield member (31) against which the air to be impinged,
Inlet of air to be sucked into the container by the blower unit (13) is open to the negative pressure space region formed in the container (25), and air is the main heating device that is sucked into the container from the inlet in after being heated toward the target object is opened at a position that is sent, windbreak member is provided in the container, prevent the air to be sucked into the container toward the object body, and a blower device It has the surface shape induced | guided | derived to the suction inlet (24) of this.

  According to the present invention, the container is filled with hot air having a temperature required for the thermal heat treatment by the main heating device and the heat pump heating device that generates air lower in temperature than the air temperature required for the thermal heat treatment. Thereby, since the air with a temperature difference is mixed in a container with a blower device and the hot air of the said required temperature is obtained, the energy consumption of a main heating apparatus can be suppressed by the auxiliary heating effect by a heat pump heating apparatus. Furthermore, the amount of air in the container that is discharged to the outside through the discharge port is replenished in the container with air that is supplementarily heated by the heat pump heating device. As a result, it is possible to reduce the energy required to raise the newly introduced air to the required temperature, and the blower device also serves as a blowing means for supplying the auxiliary heated air into the container. It is also possible to provide an apparatus that does not require a separate blowing means.

Furthermore, the air inlet into the container is opened to a negative pressure space region inside the container, and the inlet air from the inlet is opened to a position where the air is sent to the target object after being heated by the main heating device. As a result, while suppressing energy consumption, it is possible to eliminate unevenness in the atmospheric temperature of the target object despite the method of mixing air with a temperature difference, and does not hinder the thermal effect taught by the target object. Therefore, it is possible to provide a thermal apparatus that can obtain both efficient supply of hot air to the target object and suppression of energy consumption.
Furthermore, according to this invention, since the air taken in from the inlet collides with the windshield member, the air can be prevented from directly hitting the target object. Therefore, it is possible to prevent the atmospheric temperature of the target object from fluctuating greatly due to the intake air from the inlet, which is lower than the hot air required for the thermal heat treatment in the container, so that the thermal effect is reduced, and the desired thermal It is possible to provide a heating device that exhibits an effect.

  According to the invention of claim 2, the introduction port (13) of claim 1 is provided at a position closer to the suction port (24) of the blower device than the position where the target object (27) exists. Features. According to this invention, since the inlet is opened in the negative pressure space region formed inside the container by the suction of the blower device, and further closer to the inlet than the position where the target object exists, the container The air that has flowed into the interior surely forms an airflow that is sucked into the suction port before flowing into the target object. Therefore, it is possible to provide a thermal apparatus that can more efficiently realize efficient hot air supply to the target object.

According to a third aspect of the present invention, in the first or second aspect , the working fluid used in the heat pump heating device is a refrigerant mainly composed of carbon dioxide. According to the present invention, by using the refrigerant mainly composed of carbon dioxide, the heating capability of the heat pump heating device as the auxiliary heating device can be increased, and a higher temperature heat treatment can be performed in the container. . Therefore, a thermal apparatus that can be applied to a target object that requires high-temperature thermal treatment is obtained.

  In addition, the code | symbol in the bracket | parenthesis of each said means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

It is a schematic diagram which shows the structure of the thermal apparatus which concerns on 1st Embodiment to which this invention is applied. It is a block diagram regarding control of a thermal apparatus. It is a schematic diagram which shows the structure of the thermal apparatus which concerns on 2nd Embodiment to which this invention is applied.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. In addition to combinations of parts that clearly indicate that each embodiment can be combined specifically, the embodiments may be partially combined even if they are not clearly specified, unless there is a problem with the combination. Is possible.

(First embodiment)
A first embodiment to which the present invention is applied will be described. FIG. 1 is a schematic diagram illustrating a configuration of a thermal apparatus 100 according to the first embodiment. FIG. 2 is a configuration diagram relating to control of the thermal apparatus 100. The thermal apparatus 100 according to the first embodiment is an apparatus that performs thermal heat treatment for heating a component 27 that is a predetermined target object disposed in the furnace 20. The component 27 is, for example, a component that requires heat treatment with warm air during a process performed in a factory or the like, and the furnace 20 is also a preheating furnace in which heat treatment is performed.

  The heating device 100 is a device that performs a main air heating process in which the air in the furnace 20 is heated by the main heating device, and an auxiliary air heating process in which the air heated outside the furnace 20 by the auxiliary heating device is taken into the furnace 20. But there is. The heating device 100 includes a furnace 20 as a container filled with hot air for heating the component 27, an electric heater 22 as a main heating device, a heat pump heating device 1 as an auxiliary heating device, and hot air in the furnace 20. And a discharge duct 29 through which hot air passes when the hot air is discharged out of the furnace 20 in accordance with intake air by the blower apparatus 21.

  The electric heater 22 is a main heating device in the heating device 100, and heats the air existing in the furnace 20 to generate hot air necessary for the heat treatment. The electric heater 22 is configured such that the heating amount can be adjusted by controlling the energization voltage by the control device 50. The blower device 21 forms an air flow through which the hot air heated by the electric heater 22 is circulated in the furnace 20, and sucks air generated by the heat pump heating device 1 into the furnace 20 from the inlet 13. The blower device 21 is configured to be able to adjust the air volume provided by the fan 21b by controlling the rotation speed of the motor 21a by the control device 50. For example, an AC voltage whose frequency is adjusted by an inverter is applied. The rotational speed of the motor is controlled.

  In the present embodiment, the blower device 21 has a suction port 24 formed in the casing 23 in the upper part in the furnace 20. The casing 23 is arranged so as to partition the space in the furnace 20 up and down. A fan 21b of the blower device 21 and an electric heater 22 are arranged in a space above the casing 23, and in a lower space, there are an inlet 13 near the suction port 24 and a lower portion of the internal space of the furnace 20. Positioned belt conveyor 26 and component 27 are arranged. Accordingly, the air in the furnace 20 sucked from the suction port 24 from the lower part to the upper part in the furnace 20 is blown to the side (lateral direction in the furnace 20) by the fan 21b. The blown air is heated when passing through the electric heater 22, and then flows into a space below the casing 23, and is again taken into the upper space from the suction port 24 together with the air sucked from the inlet 13. Inflow.

  A part 27 is placed on the belt conveyor 26 located inside the furnace 20, moves from the outside of the furnace 20 to the inside, is sufficiently warmed by the hot air in the furnace 20, and then externally again. Move to. In the present embodiment, the belt conveyor 26 is a conveyor that is disposed below the inside of the furnace 20 and reciprocates so as to return from one side in the furnace 20 to the one side via the other side. The placed component 27 is moved back and forth so as to move from the one side toward the other side in the lower space in the furnace 20 by the driving of the belt conveyor 26 and to return to the one side again.

  As shown in FIG. 1, the one side (the right side in FIG. 1) is a side on which the discharge port 28 is disposed with respect to the left and right position of the furnace 20, and is positioned below the discharge port 28 with respect to the vertical position of the furnace 20. The side to do. The other side (the left side in FIG. 1) is the side where the inlet 13 is open with respect to the left and right position of the furnace 20 and the suction port 24 of the blower device 21 is disposed. And the side located below the suction port 24. That is, the other side corresponds to the lower side of the negative pressure space region 25 where the air in the furnace 20 is about to be sucked upward by the blower device 21. Therefore, the component 27 is a path from the position corresponding to the lower part of the discharge port 28 to the position corresponding to the lower part of the negative pressure space region 25 in the furnace 20 by the driving of the belt conveyor 26, and the return path is This is a path from a position corresponding to the lower side of the negative pressure space region 25 to a position corresponding to the lower side of the discharge port 28.

  The discharge port 28 is an opening formed in the container, and is an air outlet that passes when the air in the furnace 20 is discharged outside as the air is sucked into the furnace 20 by the blower device 21. is there. A discharge duct 29 is connected to the discharge port 28, and the discharge duct 29 takes out dust and the like together with air out of the furnace 20 by natural convection or forced convection to clean the air in the furnace 20. It serves as a discharge passage for discharging the inside air to a predetermined external location. With this configuration, the inside of the furnace 20 can always keep the air environment in a clean state. Note that dust or the like is a contaminant that is contained in the air taken into the furnace 20 or is a volatile substance or dust generated from the component 27.

  In the furnace 20, an in-furnace temperature sensor 30 for detecting the temperature of the air flowing inside is provided at a position where the air after being heated by the electric heater 22 can be detected. Therefore, the temperature signal detected by the in-furnace temperature sensor 30 is a signal of the hot air temperature in the furnace 20 adjusted to a necessary temperature by the main heating device, and is output to the control device 50. The control device 50 detects the temperature of the air in the furnace 20 by the in-furnace temperature sensor 30, and the output of the electric heater 22 and the blower device so that the detected temperature satisfies the air temperature in the furnace 20 necessary for the thermal heat treatment. The temperature of the hot air in the furnace 20 is adjusted by controlling the air volume by the valve 21 and the opening / closing operation of the opening / closing valve 12. Moreover, the control apparatus 50 can also maintain the temperature in the furnace 20 constant by controlling each part in detail.

  The heat pump heating device 1 constitutes a heat pump cycle in which at least a compressor 2, a heat radiating heat exchanger 3, an expansion valve 4, and a heat absorbing heat exchanger 5 are connected in an annular manner in order. The heat pump heating device 1 generates air having a temperature lower than the temperature of the hot air necessary for the thermal heat treatment in the furnace 20 by air heating in the heat exchanger 3 for heat dissipation. Therefore, the heat pump heating device 1 functions as an auxiliary heating device that generates auxiliary heating air heated outside the furnace 20. The auxiliary heating air is air that is heated to a temperature lower than the temperature of the hot air necessary for the thermal heat treatment in the furnace 20.

  The compressor 2 is a refrigerant compressor that sucks and compresses refrigerant in the cycle. The compressor 2 is configured to be able to adjust the refrigerant discharge amount by controlling the rotation speed by the control device 50. For example, an AC voltage whose frequency is adjusted by an inverter is applied, and the rotation speed of the motor is reduced. Be controlled. In this case, the inverter is supplied with DC power from a battery or a power source and is controlled by the control device 50. The control device 50 can control the output of the compressor 2 using, for example, the high-pressure side refrigerant pressure detected by a pressure detector provided at the outlet of the compressor 2.

  The heat dissipating heat exchanger 3 heats the air in the auxiliary heating duct 10 by the heat dissipating action of the refrigerant discharged from the compressor 2 in order to generate auxiliary heating air that assists the necessary hot air in the furnace 20. It functions as a heat exchanger for heating. The passage in the auxiliary heating duct 10 communicates from the upstream side of the position where the heat-dissipating heat exchanger 3 is arranged to the introduction port 13 disposed so as to open to the negative pressure space region 25 in the furnace 20. It is provided as follows. The negative pressure space region 25 is a space in which a negative pressure inside the furnace 20 is formed by the air flow formation in the furnace 20 by the blower device 21 and the discharge of hot air from the discharge port 28 to the outside of the furnace 20. . By opening the inlet 13 in the negative pressure space region 25, the air in the auxiliary heating duct 10 is drawn into the furnace 20, and the inlet 13 is introduced into the passage in the auxiliary heating duct 10 along with the intake air flow. An air flow toward is formed.

  A filter 11 is disposed in the passage upstream of the position where the heat exchanger 3 for heat dissipation is disposed. According to the filter 11, dust and the like contained in the air flowing toward the heat radiating heat exchanger 3 can be removed by forming an intake air flow into the furnace 20. Further, an opening / closing valve 12 is provided in a passage downstream of the position where the heat exchanger 3 for heat radiation is disposed, which closes and opens the passage and blocks and permits the flow of air in the passage.

  The control device 50 controls the on-off valve 12 so that it opens when auxiliary heating air is supplied into the furnace 20 and closes when it is not necessary to supply the auxiliary heating air. When the on-off valve 12 is closed, air does not flow into the furnace 20 through the introduction port 13, so that a certain amount of air can be discharged from the discharge port 28 by natural convection. When the on-off valve 12 is open, air is sucked into the furnace 20 through the introduction port 13, so that an air amount corresponding to the intake amount can be discharged to the outside through the discharge port 28. Therefore, the amount of auxiliary heating air introduced into the furnace 20 can be varied by opening / closing control of the opening / closing valve 12 and flow rate control of the blower device 21. Moreover, as the on-off valve 12, a control valve whose opening degree can be adjusted in the range of 0 to 100% may be used.

  The heat-absorbing heat exchanger 5 includes a refrigerant passage 5a through which a low-pressure refrigerant decompressed by the expansion valve 4 flows, and a cooled fluid passage 5b through which a fluid such as water to be cooled flows. Heat is absorbed from the fluid by heat exchange. The refrigerant passage 5a and the cooled fluid passage 5b may be configured, for example, in a double tube structure in which one passage is formed in the inner tube and the other passage is formed in the outer tube covering the outside of the inner tube. Moreover, it is preferable that the heat exchanger 5 for heat absorption is an opposing heat exchanger in which the flow directions of the fluids flowing through the refrigerant passage 5a and the cooled fluid passage 5b are opposed to each other. The expansion valve 4 may be either a fixed throttle valve or an electronically controlled variable valve whose opening degree can be adjusted.

  The to-be-cooled fluid passage 5b constitutes a part of the circulation circuit 6 in which the to-be-cooled fluid such as water circulates. A cooling tower 8, a pump 7, and a heating element 9 are connected to the circulation circuit 6 in the order in which the fluid flows. The pump 7 can adjust the circulating flow rate of the fluid by controlling the rotation speed by the control device 50. The heating element 9 is a variety of devices that release heat, and the fluid to be cooled is warmed by collecting the waste heat released by the device into the fluid to be cooled. The warmed fluid to be cooled is cooled by removing heat from the refrigerant flowing into the fluid passage 5b and flowing through the heat pump cycle by the driving force applied by the pump 7. At this time, the refrigerant recovers the heat of the fluid to be cooled, and the recovered heat is utilized as energy when the air is heated by the heat radiating heat exchanger 3. The fluid to be cooled that has absorbed heat flows into the cooling tower 8 and is cooled, and then flows into the pump 7 to recover heat from the heating element 9 again. In particular, if the heating element 9 is configured so as to recover waste heat from various machines operating in the factory, it is possible to further promote the suppression of power consumption in the heat pump heating device 1 and the electric heater 22.

  In addition, the refrigerant used in the heat pump heating apparatus 1 is not particularly limited, but may be a heat medium mainly composed of carbon dioxide, for example, in addition to the fluorocarbon refrigerant. When a refrigerant mainly composed of carbon dioxide is used, the heat pump heating device 1 constitutes a vapor compression supercritical refrigeration cycle in which the refrigerant pressure on the high pressure side is equal to or higher than the critical pressure of the refrigerant. The auxiliary heating air heated by the exchanger 3 can be heated to about 100 ° C. That is, if the refrigerant | coolant which has a carbon dioxide as a main component is used, the heating capability of the heat pump heating apparatus 1 as an auxiliary | assistant heating apparatus can be raised, and also it becomes possible to implement a high temperature thermal processing.

  The control device 50 is a device that controls the operation of each part of the heating device 100 in accordance with a program stored in advance when there is an instruction to perform a process that requires heating on the component 27. The control device 50 receives signals from various switches of the operation unit, information relating to the heat pump heating device 1 and communication signals from various detectors including the in-furnace temperature sensor 30, and signals from the input circuit. And a microcomputer for executing various calculations, and an output circuit for outputting communication signals for controlling the operation of the compressor 2, the pump 7, the on-off valve 12, the motor 21a, the electric heater 22 and the like according to the calculations by the microcomputer. I have. The microcomputer incorporates a ROM or RAM as storage means and has a preset control program and an updatable control program.

  Below, the effect which the thermal apparatus 100 of 1st Embodiment brings is demonstrated. The thermal apparatus 100 generates heat air necessary for the thermal treatment by heating the air existing in the furnace 20 and the heat pump heating apparatus 1 that generates air having a temperature lower than that of the thermal air necessary for the thermal treatment. An electric heater 22, a blower device 21 that forms an air flow through which the hot air heated by the electric heater 22 circulates in the furnace 20, and sucks the air generated by the heat pump heating device 1 into the furnace 20, and the blower device 21 And an outlet 28 through which the air in the furnace 20 is discharged to the outside as the air is sucked into the furnace 20. The air inlet 13 that is sucked into the furnace 20 by the blower device 21 opens into a negative pressure space region 25 formed inside the furnace 20, and the air sucked into the furnace 20 is heated by the electric heater 22. After that, it opens to a position where it is sent to the component 27.

  The thermal apparatus 100 according to the first embodiment has a temperature required for the thermal heat treatment by the electric heater 22 as the main heating apparatus and the heat pump heating apparatus 1 that generates air at a temperature lower than the air temperature necessary for the thermal heat treatment. Fill the furnace 20 with air. Thereby, in order to obtain the hot air of the said required temperature by mixing the air with a temperature difference in the furnace 20 with the blower apparatus 21, the consumption energy of the electric heater 22 is suppressed by the auxiliary heating effect by the heat pump heating apparatus 1. Can do. In particular, since the heat pump heating device 1 that is very energy efficient and consumes less power is used as an auxiliary heating device compared to the electric heater 22 and the like that generate heat when energized, the power consumption suppression effect of the entire heating device 100 is reduced. Will be enormous.

  Further, the amount of air in the furnace 20 discharged to the outside through the discharge port 28 is replenished into the furnace 20 with air supplemented by the heat pump heating device 1. Thus, the energy required for raising the newly introduced air to the required temperature can be reduced, and the blower device 21 also serves as a blowing means for supplying the auxiliary heated air into the furnace 20. be able to. Therefore, it is also possible to provide an apparatus that does not require a dedicated blowing means for supplying auxiliary heating air. Therefore, it is possible to reduce the cost for providing the air blowing unit itself and to reduce energy such as electric power required to drive the air blowing unit, and it is possible to provide the heating device 100 that is excellent in terms of product configuration and energy efficiency.

  Further, the air inlet 13 into the furnace 20 is opened to the negative pressure space region 25 inside the furnace 20, and the intake air from the inlet 13 is heated by the electric heater 22 and then sent toward the component 27. Open at a position where As a result, the air taken into the furnace 20 from the inlet 13 is heated by the electric heater 22 before being blown to the component 27. That is, the intake air is supplied into the furnace 20 so as not to affect the heat treatment of the component 27 in the thermal heat treatment for the component 27. From this, while suppressing energy consumption as described above, it is possible to receive the component 27 by eliminating the variation in the ambient temperature of the component 27 despite the fact that the air having a temperature difference is mixed in the container. Does not interfere with the thermal effect. Therefore, it is possible to realize the heating device 100 that can obtain both efficient supply of hot air to the component 27 and suppression of energy consumption.

  The introduction port 13 is provided at a position closer to the suction port 24 of the blower device 21 than the position where the component 27 exists. According to this, the introduction port 13 is opened to the negative pressure space region 25 formed inside the furnace 20 by the intake air by the blower device 21, and further closer to the suction port 24 than the position where the component 27 exists. Therefore, the air that has flowed into the furnace 20 forms an airflow that is reliably sucked into the suction port 24 before flowing into the component 27. Therefore, it is possible to realize the heating device 100 that can more efficiently supply the warm air to the component 27 more reliably.

  In addition, when a refrigerant mainly composed of carbon dioxide is used as a working fluid in the heat pump heating device 1, the heating capability of the heat pump heating device 1 as an auxiliary heating device can be increased, and a higher temperature thermal treatment is performed in the furnace 20. Can be implemented. Therefore, the thermal apparatus 100 applicable to the component 27 requiring higher temperature thermal processing can be realized.

(Second Embodiment)
100 A of thermal apparatuses which concern on 2nd Embodiment are the forms provided with the windbreak member 31 in the position where the air taken in in the furnace 20 from the inlet 13 collides with the thermal apparatus 100 of 1st Embodiment. . The second embodiment is the same as the first embodiment except for the configuration including the windbreak member 31, for example, the other configuration, the operation of each part, the operational effect, and the like. FIG. 3 is a schematic diagram showing a configuration of a heating device 100A according to the second embodiment.

  The thermal apparatus 100A of the second embodiment includes a windbreak member 31 that collides with air sucked into the furnace 20 from the inlet 13. According to this configuration, since the air taken in from the inlet 13 collides with the windbreak member 31, the intake air first collides with the surface of the windbreak member 31, and reaches the belt conveyor 26 positioned below. It can be prevented from heading and guided to the upper suction port 24 along the surface shape of the windbreak member 31. Thereby, it is possible to prevent the intake air from directly hitting the component 27 immediately after flowing into the furnace 20. Therefore, it is possible to prevent the atmospheric temperature of the component 27 from greatly fluctuating due to the intake air from the inlet 13 which is lower than the hot air necessary for the thermal heat treatment in the furnace 20, so that the thermal effect is not lowered. Thus, the heating device 100A that exhibits the warming effect is obtained.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In each of the above embodiments, the heat-absorbing heat exchanger 5 in the heat pump heating device 1 is configured to cool the cooling fluid flowing through the piping by heat exchange with the refrigerant, but ducts air as the cooling fluid to be cooled. For example, the heat absorption heat exchanger 5 may be blown. Further, the air cooled by the heat absorption heat exchanger 5 may be supplied to the cooling target space and used for local air conditioning, indoor air conditioning, or the like in the factory. Alternatively, the refrigerant flowing through the piping of the heat pump heating device 1 may be drawn into the cooling target space and directly exchanged heat with an indoor unit or the like to provide the cold air.

  Further, the hot air in the furnace 20 discharged to the outside from the discharge duct 29 is blown to the heat absorbing heat exchanger 5, and the heat contained in the hot air flows through the heat absorbing heat exchanger 5. You may make it heat-recovery to a refrigerant | coolant. As a result, the hot air in the furnace 20 is not simply discarded outside, but is recovered by the refrigerant, so that the heat dissipating ability in the heat exchanger 3 for heat dissipating is improved and the improved heat dissipating ability is It can be used as an amount of heat to assist air.

  The configuration of the heating devices 100 and 100A described in the above embodiments is merely an example of the embodiment according to the present invention. Therefore, the position of the negative pressure space region 25 in the furnace 20, the position of the introduction port 13, the movement path of the parts 27 moving on the belt conveyor 26, the position of the blower device 21, the position of the electric heater 22, and the position of the discharge port 28. In addition to the above embodiments, the flow path of hot air inside the furnace 20 (the path indicated by the arrows in FIGS. 1 and 3) and the like can be changed within a range where the effects of the present invention can be achieved.

  Further, in each of the above embodiments, the blower device 21 has the fan 21b inside the furnace 20 and forms forced convection of hot air in the furnace 20, but to form convection of the hot air. In addition, the blower device may be provided outside the container of the furnace 20. In this case, the air in the furnace 20 is taken out from the air outlet formed in the container by the suction force of the blower device located outside, and is formed in the container through a duct provided outside the container. It flows into the furnace 20 from the inlet. And the inlet 13 is provided so that it may open to the negative pressure space area | region formed in the furnace 20, when it inhales outside from an air extraction port.

DESCRIPTION OF SYMBOLS 1 ... Heat pump heating apparatus 13 ... Inlet 20 ... Furnace (container)
22 ... Electric heater (main heating device)
DESCRIPTION OF SYMBOLS 21 ... Blower apparatus 25 ... Negative pressure space area | region 27 ... Target object 28 ... Discharge port 100 ... Thermal apparatus

Claims (3)

A heating device (100) for performing a heat treatment for heating a predetermined target object (27) disposed in a container (20),
A heat pump heating device (1) for generating air having a temperature lower than the temperature of the hot air necessary for the heat treatment;
A main heating device (22) for heating the air present in the container in which the target object is disposed to generate hot air necessary for the thermal heat treatment;
A blower device (21) for forming an air flow for circulating hot air heated by the main heating device in the container, and for sucking the air generated by the heat pump heating device into the container,
A discharge port (28) formed in the container and through which the air in the container is discharged to the outside as the air is sucked into the container by the blower device;
A windbreak member (31) against which air sucked into the container by the blower device collides;
With
Inlet of the air to be sucked into the container by the blower unit (13) is open to the vacuum space area (25) formed in said container, and is sucked from the inlet port into the container The air is heated by the main heating device and then opened to a position where it is sent toward the target object,
The wind Yoke member is provided in the container, the air taken hinders that toward the object body in the container, and the surface shape induced to the suction port of the blower device (24) A thermal apparatus characterized by comprising:   The heating device according to claim 1, wherein the introduction port (13) is provided at a position closer to the suction port (24) of the blower device than a position where the target object (27) exists. . The heating apparatus according to claim 1 or 2 , wherein the working fluid used in the heat pump heating apparatus is a refrigerant mainly composed of carbon dioxide.

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