JPS61143062A - Power source apparatus of electric cooling pillow - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic cooling pillow using a thermoelectric cooling device, and relates to a power supply device suitable for providing comfortable cooling.

To relieve fever-related illnesses, or when it is difficult to sleep during a nap on a tropical night or midsummer, a water pillow is used, or a mat packed with a substance with a high specific heat is used by cooling it with cold WWt. In some cases, the power does not last long, but immediately after using it, you will not only feel so cold that you will feel a headache, but also the water vapor in the air will condense on the surface of the pillow, causing your head and futon to become wet, making it uncomfortable to use. This is a big problem for mentally unstable patients, etc. 4) Fourthly, the above-mentioned Kogyo? Narishi provides a comfortable electronic cooling pillow that cools at the appropriate temperature 4 times and does not get too cold. Its purpose is to provide power supplies.

That is, in a power supply device for an electronic cooling pillow, in which a cooler is installed on the heat-absorbing side of a thermoelement and a radiator is installed closely on the heat-generating side, and the cooler is installed at the top and the radiator is at the bottom, one source A means for controlling the output applied to the thermoelement of the device is provided, and a temperature sensing element is provided in close contact with the cooler, and the output is changed according to the temperature detected by the temperature sensing element. As a result, cooling at an appropriate temperature can be maintained and a comfortable cooling pillow can be provided.

Hereinafter, one embodiment of Book 1 will be described in Figs. 1 to 4, where air inlets are provided on both sides of the body, 3 is an air outlet, and is connected to the inlet 2 and the heat dissipation duct 4. I'm passing through. 5 is a thermoelement, the output cord 6 is connected to the power supply equipment fi18 through the control cord 7, and by passing a direct current through the thermoelement 5, an endothermic phenomenon occurs on the upper surface.
A heating phenomenon occurs on the bottom surface. The upper surface of the thermoelement 5 and the cooler 9a are in close contact, and the cooler 9a is cooled by the heat absorption phenomenon of the thermoelement 5 to lower its temperature. 11 is cooled. On the other hand, the lower surface of the thermoelement 5 is in close contact with the radiator 12, and the temperature of the radiator 12 rises, and heat is transferred to the air in the heat radiator duct 4 through the radiator fins 13 provided in close contact with the radiator 12. introduce. The temperature of the air in the heat radiation duct 4 that has received heat from the heat radiation fins 16 rises, the air becomes lighter, and is discharged to the outside from the discharge port 6, and at the same time, low temperature air is replenished from the suction port 2. In addition, a temperature sensing element 14 is provided in close contact with the cooler 9b, and the temperature sensing element 14 is connected to the power supply device 8 via a thermo cord 15 that passes through the control cord 7 and is connected to the power supply device fl18. There is. The temperature of the cooler 9b is detected by the temperature sensing element 14 and fed back to the power supply device #8 from time to time, and the output of the power supply device 8 changes according to the feedback signal, the cooling power of the thermoelement 5 changes, and the cooling The temperature of the container 9b is kept constant.

In this embodiment, the electric circuit is configured as shown in the block diagram shown in FIG. 16 is a plug, and 17 is a current leak, which is connected in series with the switch 18. The switch 18 is connected in series to an excitation switching power supply 19 and an auxiliary power supply 20 for a control circuit of the switching power supply, in addition to a one-way forward converter, etc., and the supply t to these power supplies is turned on and off by the switch 18. One end of the temperature sensing element 14 is connected to an auxiliary power supply 20 via a variable resistor 21.
The other end is connected to the earth line 22, and the connection point 26 between the temperature sensing element 14 and the variable resistor 21 is connected to the comparator 2.
The positive phase side of the comparator 24 is connected to the triangular wave generator ft26 together with the positive phase side of another comparator 25, and the output side of the comparator 24 is connected to the cathode of the diode 27. The anode of the diode 27 is connected to the output side of the comparator 25 as well as to the drive signal input section of the switching power supply 19. Further, the negative phase side of the comparator 25 is connected to the reference voltage generator #28, and by comparing the triangular wave 66 and the reference voltage 30, a periodic pulse is generated, and the switching power supply 19
is driving. Temperature sensing element 14Fi detection! It has a characteristic that the resistance value increases as +f decreases, and the auxiliary power supply 20
The voltage supplied from the comparator 24 is divided to generate a thermo signal 62, and the thermo signal 62 is input to the negative phase side of the comparator 24, and the triangular wave generator 26 is connected to the positive phase side of the comparator 24.
A triangular wave 65 is generated manually, the triangular wave 65 and the thermo signal 62 are compared in the comparator 24, and a thermo output 64 is generated at a connection point 65 between the comparator 24 and the anode of the diode 27. When the potential of the thermo output 64 is at a low level, the potential of the control signal line 66 is forced to a low level via the diode 27, and when the thermo output 64 is at a high level, the potential of the control signal line 66 is forced to a low level. It is determined by the output of the comparator 25. The comparator 25a compares the triangular wave 33 with the reference voltage 30, and when the potential of the triangular wave 36 is higher than the reference voltage 30, the output becomes high level. Therefore, the control signal 6
1, the pulse width changes depending on the setting value of the reference voltage 60 and the thermo output 62, and the on time (hereinafter referred to as deity) for one switching cycle of the switching power supply 19 changes, and the output of the power supply device 8 changes. Further, when the resistance value of the variable resistor 21 is changed, the potential of the connection point 23 is changed, and the set value of the temperature of the temperature sensing element 14 is changed. When a direct current is passed through the thermoelement 5, the temperature of the cooler 9b gradually decreases, the resistance value of the temperature sensing element 14 gradually increases, and the potential of the thermosignal 62 gradually increases. Thermo signal 32
When becomes higher than the triangular wave 33, the thermo output 34 becomes low level, and while the potential of the ζ thermo signal 62 is lower than the reference voltage 60, the control signal 61 oscillates with a constant pulse width determined by the triangular wave 63 and the reference voltage 30. However, when the potential of the thermo signal 32 becomes higher than the reference voltage 60, the pulse width of the control signal 51 becomes the same as that of the thermo output 32. The time for the thermo output 32 to reach a high level, that is, the pulse width, gradually becomes narrower as the potential of the thermo signal 62 increases, and the pulse width of the high level of the control signal 61 becomes narrower.
The duty of the switching power supply 19 becomes smaller, and the output of the switching power supply 19, that is, the output of the power supply device #8, gradually becomes smaller. When the output of the power supply unit f18 becomes smaller, the cooling power of the thermoelement 5 becomes smaller, and the thermal load of the electronic cooling pillow 1 and the cooling power of the thermoelement 5 are stabilized in the same state, and when the thermal load increases or decreases, the cooling power of the thermoelement 5 decreases. As the temperature changes, the output of the power supply device 8 immediately increases and decreases continuously, the cooling power of the thermoelement 5 increases and decreases steplessly, and the temperature of the cooler 9b is always kept constant. The power supply device 8 is operated by the knob 68 of the switch 18 and the knob 29 of the variable resistor 21. 37 is a power cord.

In this embodiment, the cooling temperature can be kept constant with a quick response even when the heat load fluctuates, and the cooling temperature can be easily varied, making it suitable for miniaturization and control of the output of the device. As a result, the cooling capacity of the thermoelement can be automatically adjusted according to the size of the heat load on the electronic cooling pillow, preventing excessive cooling, and constantly maintaining the temperature of the cooler even if the user of the electronic cooling pillow or the usage situation changes. can be kept constant. Furthermore, since the output of the Fi power supply device is automatically reduced when the heat load is small, power consumption can be reduced. By configuring the device to change the set value of the detected temperature of the temperature sensing element according to the resistance value of the variable resistor, the user can freely select a different comfortable temperature. Also, using a switching power supply,
By configuring the temperature to change steplessly according to the difference between the temperature detected by the temperature sensing element and the temperature setting,
It is possible to provide a power supply device for an electronic cooling pillow that is small and efficient, has a quick response to detected temperature, and has little temperature fluctuation in the cooler.

The block diagram, FIG. 4, shows voltage waveforms at various parts of the circuit shown in FIG.

DESCRIPTION OF SYMBOLS 1... Main body of electronic cooling pillow, 5... Thermo element, 8... Power supply device, 9a, 9b... Cooler, 12...
... Heatsink, 14 ... Temperature sensing element, 19 ... Switching power supply, 20 ... Auxiliary power supply, 21 ... Variable resistor,
24.25... Comparison, comparator, 26... Triangular wave generator, 28... Reference voltage generator, 60... Reference voltage,
61... Control signal, 62... Thermo signal.

Katsuo Ogawa.

Claims (1)

[Claims] 1. A power supply for an electronic cooling pillow in which a cooler is installed on the heat absorption side of a thermoelement, and a radiator is installed on the heat generation side in close contact with each other, and the cooler is installed at the top and the radiator is at the bottom. In the apparatus, a means for controlling the output applied to the thermoelement of the power supply device is provided, a magnetically sensitive element is provided in close contact with the cooler, and the output is changed according to the temperature detected by the thermosensitive element. A power supply device for an electronic cold pillow, characterized in that it is configured as follows. 2. The electronic cooling pillow according to claim 1, wherein the power supply device is provided with a variable resistor, and the set value of the detected temperature of the temperature sensing element is changed according to the resistance value of the variable resistor. power supply. 3. In the power supply device of the electronic cooling pillow, a switching method is used as a means to obtain the output to be applied to the thermoelement from the commercial power supply, and the on time for one cycle of such switching is determined by the detected temperature of the thermosensor and the temperature setting value. A power supply device for an electronic cooling pillow according to claim 1 or 2, wherein the power supply device is configured to change steplessly according to the difference in the temperature.