JPH04353356A - Heat accumulative type electrical hot air heater - Google Patents

Abstract

PURPOSE:To improve a heating rising characteristic by a method wherein a heat accumulative thermostat is connected to a main switch, inlet and outlet dampers are connected to an operation switch, a mixing damper is connected to a hot air thermostat and a convection flow fan is connected to an operation switch and a hot air thermostat, respectively. CONSTITUTION:A main switch 20 is turned on, the temperature of a heat accumulation box 6 is detected by a heat accumulating thermostat 21 in the heat accumulation box 6. A heater 7 is operated to accumulate heat in such a way that the temperature of the heat accumulation box 6 gets a set temperature. The heat accumulating member also serves as the heater member 7 and heat is accumulated during nighttime at a high efficiency. As an operation switch 22 is turned on, on inlet damper 12 and an outlet damper 13 are opened, a convection flow fan 15 is forcedly operated, air is passed from an air passage 14 through the heat accumulation box 6, heated by the heater 7 and flows into an air mixing chamber 19. Air temperature in the mixing chamber 19 is detected by a hot air thermostat 23 so as to control a mixing damper 18 and a fan 15 according to a set temperature and then the hot air temperature at a blowing port 4 is adjusted. The accumulated heat is utilized for a specified period of time at the beginning of operation to blow hot air and then the hot air rising characteristic is improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage electric hot air heater using electric energy as a heat source.

0002

BACKGROUND OF THE INVENTION Conventional portable electric heaters include reflection type and convection type.Currently, many forced convection type electric warm air heaters called electric ceramic fan heaters are on sale. However, due to the electrical capacity of the electrical outlet circuit of a general household power supply, the power consumption is 1.2k at maximum.
Only about 1,032 kcal/h was sold, and due to its low heating capacity, it was generally used for spot heating or auxiliary heating.

0003

[Problem to be solved by the invention] The general heating suitable rooms (capacity) used for catalog display of heaters, etc. Warm regions: wooden houses 350kcal/tatami, concrete houses 250kcal/tatami Cold regions: wooden houses 330kcal/tatami, concrete houses 210kcal/tatami based on the heating output of electric heaters. Ru. This value is calculated by calculating the amount of heat loss when heating only one room, taking into account the surplus power such as the start-up time during heating, and calculating the amount of heat loss (the amount of heat required to maintain heating) by approximately 2.
If the calculated value is to maintain a general heating temperature, the amount of heat required is approximately 1/2 of the above-mentioned value. For example, if you use a conventional 1.2kw (1.032kcal/h) electric heater to heat a concrete house such as an apartment in a warm region, and calculate the heating capacity using the above values, it will heat approximately 4 tatami mats. It means that you only have the ability,
However, judging from the amount of heat loss, it has the ability to maintain heating for about 8 tatami mats. Therefore, even with the current power consumption of electric heaters, if the heating start-up characteristics are improved, the electric heater can be used as a main heater, and there has been a demand for an improvement in the heating start-up characteristics.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a heat storage electric hot air heater with good heating start-up characteristics.

[0005]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention includes a heating element 7 that also serves as heat storage, and a heat storage thermostat 21 connected to the heating element, in the heater main body 1.
an air passage 14 having a convection fan 15 communicating with the inlet opening 9 of the heat storage box via an inlet damper 12; An air mixing chamber 19 having a communicating outlet 4 and a hot air thermostat 23, and a mixing damper 18 provided at a communicating port 17 between the air mixing chamber and the air passage on the outlet side of the convection fan, The thermostat is connected to the main switch 20, the inlet damper and outlet damper are connected to the operation switch 22 connected in series to the main switch, the mixing damper is connected to the hot air thermostat connected in series to the operation switch, and the convection fan is connected to the operation switch and the hot air. It is connected to the respective thermostats.

[0006]

[Operation] When the main switch 20 is turned on, the temperature inside the heat storage box 6 is detected by the heat storage thermostat 21 installed inside the heat storage box 6, and the heat storage box 6 is adjusted to a temperature corresponding to the set temperature. The heating element 7 inside is energized, generates and stores heat, and is maintained at that temperature. Since the heat storage element also serves as the heating element 7, it is possible to store heat with high efficiency without heat loss. As described above, heat is stored when not in use (such as at night). The heat storage temperature is set to a temperature higher than the normal operating temperature when no heat is stored. Next, when the operation switch 22 is turned on to start heating, the hot air thermostat 23, the entrance damper 12, the exit damper 13, and the convection fan 15 are energized, each damper 12, 13 is opened, and the convection fan 15 is operated at high speed. Start blowing air. The blown air is passed through air passage 1
4, passes through the heat storage box 6, and when passing by the heating element 7, which has accumulated heat and is at a high temperature, it is heated and becomes hot air and flows into the air mixing chamber 19. By the hot air thermostat 23,
The air temperature in the air mixing chamber 19 is detected, and the mixing damper 18 and the convection fan 15 are controlled according to the set temperature, so that the temperature of the hot air from the outlet 4 is made appropriate.

When the air temperature in the air mixing chamber 19 is higher than the set temperature of the hot air thermostat 23, the hot air thermostat 23 is turned on, the convection fan 15 is operated at high speed, and at the same time, the mixing damper 18 is opened. Cold air (indoor air) flows into the air mixing chamber 19 from the communication port 17, mixes with hot air to reach an appropriate temperature, and is blown out from the air outlet 4. When the air temperature in the air mixing chamber 19 is lower than the set temperature of the hot air thermostat 23, the hot air thermostat 23 is turned off, the convection fan 15 is operated at low speed, and at the same time the mixing damper 1 is turned off.
8 becomes "closed", the inflow of cold air from the communication port 17 is stopped, and the temperature becomes appropriate. Through the above operations, the heat storage box 6
Inside, the heat storage is gradually taken away by the blown air, and if the temperature of the heating element falls below the set temperature, the heat storage thermostat 2
1 enters, the heating element 7 is automatically energized and generates heat. Then, due to the heat radiation to the air passing through the heat storage box 6, the temperature (heat storage) of the heating element 7 gradually decreases, and finally the heat storage disappears and the temperature reaches the normal hot air usage temperature (normal operating temperature).
Normally operated. As described above, heating start-up characteristics are improved by blowing out hot air with a higher calorific value than during normal operation by utilizing the heat stored in the heating element for a certain period of time at the beginning of operation (during the period when heat storage is taken away).

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described with reference to the drawings. As shown in FIGS. 1(A), 2(B), and 2, on the front side of the heater body 1, an operating section 2 equipped with a main switch 20, an operation switch 22, etc. is placed upward, and a hot air 3 for heating is supplied. An air outlet 4 is provided below. Inside the heater body 1, there is a heat storage box 6 covered with a heat insulating material 5, and inside the heat storage box 6, a plurality of heating elements 7 made of SiC, which itself functions as a heat storage body, are arranged for ventilation. If possible, they are installed in parallel with space 8 between them. Note that the configuration of the heating element 7 may be integrally molded into a honeycomb shape or an uneven shape so that the heating element 7 itself has a space. The heating element 7 is connected to a heat storage thermostat 21 connected in series to the main switch 20. The heat storage temperature is set to a temperature (for example, 300 to 500°C) higher than the normal use temperature (about 80°C) when no heat is stored.

An air passage 14 equipped with a convection fan 15 communicates with the inlet opening 9 of the heat storage box 6, and an inlet damper 12 is installed in the communication part. Further, an air mixing chamber 19 communicates with the outlet opening 10 of the heat storage box 6, and an outlet damper 13 is installed in the communication part. The inlet damper 12 and the outlet damper 13 are connected to an operation switch 22 connected in series to the main switch 20, and are automatically opened and closed when the operation switch 22 is turned on and off. The air mixing chamber 19 and the air passage 14 on the outlet side of the convection fan 15 communicate with each other through a communication port 17.
A mixing damper 18 is installed. Furthermore, a hot air thermostat 23 is installed in the air mixing chamber 19 to detect the air temperature in the air mixing chamber 19 and to set the temperature of the hot air 3 from the outlet 4 to be appropriate. There is.

The mixing damper 18 is connected to a hot air thermostat 23 connected in series to an operation switch 22.
The hot air thermostat 23 detects the air temperature in the air mixing chamber 19 and turns it "on" or "off" depending on the set temperature to "open" or "close" the mixing damper, thereby controlling the air 11 blown by the convection fan 15. In order to cool the hot air 24, it is guided into the air mixing chamber 19 from the communication port 17 as necessary. In addition, the convection fan 15 has a warm air thermostat 23 "
It is electrically connected so that when it is turned on, it operates strongly, and when it is turned off, it operates weakly. Further, the convection fan 15 may be operated not only in strong and weak operation, but also in strong, medium and weak operation, stepless control operation, etc. One side of the air mixing chamber 19 communicates with the air outlet 4 , and the air supplied to the air mixing chamber 19 is blown out as hot air 3 from the air outlet 4 .

[0011]

[Effects of the Invention] The present invention is configured such that a main switch is connected to a heating element that also serves as heat storage via a heat storage thermostat, so that heat can be stored when the operation switch is OFF and heating is not in use.
During a certain period of time at the beginning of operation (while the heat storage is being taken away), the heat storage in the heating element is used to blow out hot air with a higher calorific value than during normal operation, which improves heating start-up characteristics and It can be used as a main heater for a room whose size matches the heating maintenance capacity calculated from the power consumption.

[Brief explanation of drawings]

1 shows an embodiment of the present invention, FIG. 1(A) is an explanatory diagram of an internal configuration, and FIG. 1(B) is an electrical system block diagram.

FIG. 2 is a perspective view showing an embodiment of the present invention.

[Explanation of symbols]

1　Heating machine body 4 Air outlet 5 Insulation material 6 Heat storage box 7 Heating element 9 Inlet opening 10 Exit opening 12 Inlet damper 13 Exit damper 14 Air passage 15 Convection fan 17 Communication port 18 Mixed damper 19 Air mixing chamber 20 Main switch 21 Heat storage thermostat 22 Operation switch 23 Hot air thermostat

Claims (1)

[Claims] [Claim 1] A heating element 7 that also serves as heat storage and a heat storage thermostat 21 connected to the heating element are provided in the heater body 1.
an air passage 14 having a convection fan 15 communicating with the inlet opening 9 of the heat storage box via an inlet damper 12; An air mixing chamber 19 having a communicating outlet 4 and a hot air thermostat 23, and a mixing damper 18 provided at a communicating port 17 between the air mixing chamber and the air passage on the outlet side of the convection fan, The thermostat is connected to the main switch 20, the inlet damper and outlet damper are connected to the operation switch 22 connected in series to the main switch, the mixing damper is connected to the hot air thermostat connected in series to the operation switch, and the convection fan is connected to the operation switch and the hot air. A heat storage electric hot air heater characterized by being connected to a thermostat.