JPH0445365A - Electronic freezing device - Google Patents

Abstract

PURPOSE:To save the electric power consumption and to perform an efficient operation by a method wherein a supplying of an electrical power is controlled in such a way as a sum of an electric power supplied to a thermo-electrical element and another electric power supplied to a blower is made minimum while either a utilization side heat absorbing calorie for the thermo-electrical element or a required value of a heat radiation calorie is being filled. CONSTITUTION:An aeration duct 1 communicating with a car compartment and another aeration duct 2 communicating an external side of the car compartment are arranged side-by- side. An electronic freezing device 5 is disposed at a part where both aeration ducts 1 and 2 are approached from each other. Heat absorbing fins 11 of the electronic freezing device 5 are disposed within the aeration duct 1 and at the same time the heat radiation fins 12 are disposed within the aeration duct 2. Air is blown by a heat absorbing side blower 3 to the heat absorbing fins 11 at the utilization side of the electronic freezing device 5 and at the same time the air is blown by the heat radiation side blower 4 to the heat radiation fins 12 at the non-utilization side. Supplied electrical power for the blowers 3 and 4 and the supplied electrical power for the thermo-electrical element of the electronic freezing device 5 are controlled by a controller 6 acting as a control means in response to the conditions. A set temperature Tset is inputted to the controller 6 and further other signals from an indoor air temperature sensor, an outdoor air temperature sensor and a sun-shining sensor are also inputted to the controller 6.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to an electronic refrigeration device.

[Conventional technology]

Conventionally, air conditioners using thermoelectric elements
5-41964.

In this device, when performing capacity control (cooling/heating capacity control), this was handled by changing the power supplied to the module.

[Problem to be solved by the invention]

However, when considering the total power related to this device, there is a problem that simply controlling only the power supplied to the module makes it impossible to control the capacity with the minimum power.

An object of the present invention is to provide an electronic refrigeration system that can suppress power consumption and operate efficiently.

[Means to solve the problem]

This invention includes a thermoelectric element having heat radiation and heat absorption fins;
A blower blows air to the heat radiation or heat absorption fins on the non-use side of the thermoelectric element, and the power supply to the thermoelectric element and the power supplied to the blower are adjusted while achieving the required value of heat absorption or heat radiation amount on the use side of the thermoelectric element. The gist of this is an electronic refrigeration system that is equipped with a thermoelectric element and a control means that controls the power supply to the blower so that the total power is minimized.

[Effect]

The control means controls the power to the thermoelectric element and the blower so that the total power of the power supplied to the thermoelectric element and the power supplied to the blower is minimized while achieving the required value of heat absorption or heat radiation on the user side of the thermoelectric element. Control supply.

〔Example〕

EMBODIMENT OF THE INVENTION Hereinafter, one embodiment in which the present invention is embodied in a vehicle air conditioner will be described with reference to the drawings.

As shown in FIG. 1, a ventilation duct 1 leading into the vehicle interior and a ventilation duct 2 leading to the exterior of the vehicle are arranged side by side. Further, the ventilation duct 1 is provided with a heat absorption side blower 3, and the ventilation duct 2 is provided with a heat radiation side blower 4, and air is introduced into the ventilation ducts 1 and 2 by driving the blowers 3 and 4. An electronic refrigeration unit 5 is disposed at a portion where both ventilation ducts 1 and 2 are close to each other downstream of the blower 3.4, and an endothermic fin If (endothermic electrode plate) of the electronic refrigeration unit 5 is arranged within the ventilation duct l. At the same time, a radiation fin 12 (radiation electrode plate) of the electronic refrigeration unit 5 is arranged within the ventilation duct 2. Then, the heat absorption side blower 3 blows air to the heat absorption fins 11 on the side where the electronic refrigeration unit 5 is used, and the heat radiation side blower 4 blows air on the heat radiation fins 12 on the non-use side of the electronic refrigeration unit 5.

A controller 6 serving as a control means controls the power supplied to the blowers 3 and 4 (the amount of air blown) and the power supplied to the thermoelectric element (Bertier element) of the electronic refrigeration unit 5 according to conditions. There is. This controller 6
In addition to inputting the set temperature Tset, signals from an inside temperature sensor, an outside temperature sensor, and a solar radiation sensor are inputted to .

The structure of the electronic refrigeration unit 5 will be explained with reference to FIGS. 2 to 6. In addition, in FIG. 2, ventilation is carried out in the direction of arrow W.

FIG. 2 is a partially omitted perspective view of the electronic refrigeration unit 5 according to this embodiment, and FIG. 3 is the electronic refrigeration unit 5 shown in FIG.
4 is a partial sectional view taken along the line A-A in FIG. 3, FIG. 5 is a partial sectional view taken along the line BB in FIG. 3, and FIG.
It is a cross-sectional view omitted from the intermediate part along line CC in the figure. Although louvers 19 are formed on all the fins 11 and 12, the louvers 19 are shown only on one fin 11 in FIG. 2, and illustrations of the others are omitted. In addition, in FIGS. 2 and 6, the laminated structure in the middle portion is a repetition of the laminated structure shown at both ends, and is therefore not shown.

In FIG. 2, the electronic refrigeration unit 5 includes fins 11. spacer 17, spacer 16, fin 12,
Spacer 17, spacer 18, fin 11. Spacer 1
7. It is constructed by laminating spacers 16, fins 12, spacers 17, spacers 18, fins 11, . . . in the above order. Here, the spacers 16, 17, and 18 are made of electrically insulating heat-resistant resin. In this embodiment, heat absorbing fins 11 and heat dissipating fins 12 are arranged alternately in two rows.

Further, on one side of the electronic refrigeration unit 5, terminals 13 and 14 are provided corresponding to each of the element rows. Further, on the other side of the electronic refrigeration unit 5, a terminal plate 15 is provided to electrically connect each of the element rows. Each of the above components is fastened with bolts 20a and 20b.

In FIG. 3, holes 11.a and 12a are formed in the fins 11 and 12, respectively, through which bolts 20a and 20b pass. Also, bolt 2 to spacer 16.17°18.
Hole 16a through which 0a and 20b pass.

17a, 18a and holes 16b, 17b, 18b are formed. The terminals 13, 14, and terminal plate 15 also have holes 13a through which bolts 20a and 20b pass.

14a and 15a are formed.

A collar 21 made of an insulating material is interposed between the bolts 20a, 20b and the terminals 13, 14, and between the nuts 20c, 20d and the terminal plate 15. This allows the fourth
As shown in the figure and FIG. 6, bolts 20a and 20b pass through the electronic refrigeration unit 5, and the electronic refrigeration unit 5 is tightened by the bolts 20a and 20b and nuts 20c and 20d.

As illustrated in FIGS. 5 and 6, heat absorption fins 11
An N-type thermoelectric element 22 or P
A type thermoelectric element 23 is provided so that it can be energized. In addition, the spacers 16, 17, 18 have holes 16c, 16d, 16e, 16f for providing an N-type thermoelectric element 22 or a P-type thermoelectric element 23, as shown in FIGS. 3, 4, and 6. 17c,
17d.

17e, 17f, 18c, 18d, 18e, and 18f are provided.

In this embodiment, the positive pole of the power source is connected to the terminal 13, and the negative pole of the power source is connected to the terminal 14. As a result, current flows from the terminal 13 through the two PN element rows on the left side of FIG. 6, via the terminal plate 15, and through the two PN element rows on the right side of FIG. 6 to the terminal 14.

Then, the heat is absorbed from the heat absorption fins 11, and the heat dissipation fins 1
Releases heat to 2.

In this electronic refrigeration unit 5, the heat absorption capacity Qc of the Peltier element is the temperature difference ΔT between the heat radiation surface temperature T)I and the heat absorption surface temperature Tc, as shown in FIG. The smaller Tc is, the larger TH, Tc (
ΔT) is constant, the heat absorption capacity Qc has a maximum value for a certain supplied power.

On the other hand, in order to reduce the temperature difference ΔT (reduce TH), as shown in FIG. When the situation is good, the amount of air flow may be small. From the above relationship, the relationship between the Peltier power supply P1 and the radiation blower power supply P2 to obtain a certain heat absorption capacity Qc is as shown in FIG. 9, and the total power supply (Pl+P2) has a minimum value. Utilizing this property, the controller 6 adjusts the cooling capacity of the vehicle interior (=heat absorption capacity Qc) required by external conditions.
The Peltier supply power PI and the heat radiation blower supply power P2 are controlled so as to minimize the total power PL+P2, which is the sum of the Peltier supply power PI and the heat radiation blower supply power P2.

Next, the operation of the vehicle air conditioner configured in this way will be explained in the first section.
This will be explained based on diagram O.

First, in step 101, the controller 6 reads the set temperature Tset requested by the occupant, the output values of the inside temperature sensor, outside temperature sensor, and solar radiation sensor, and calculates the required blowing temperature TaO from these data in step 102. In step 103, the controller 6 calculates the required endothermic surface temperature Tc from the required blowout temperature Tao.

Then, in step 104, the controller 6 calculates the amount of air blown by the endothermic side blower 3 from the required endothermic surface temperature T-c using the map shown in FIG. At this time, the required endothermic surface temperature Tc
is below the allowable lower limit temperature Tcm, the necessary endothermic surface temperature Tc is set to the allowable lower limit temperature Tcm, and the air flow rate is increased. Then, the controller 6 performs step 10.
In Step 5, the final required endothermic surface temperature Tc and the amount of air blown by the endothermic side blower 3 are determined.

Next, in step 106, the controller 6 controls the Peltier supply power P according to a change pattern preset to the minimum power based on the final required endothermic surface temperature Tc and the final air flow rate.
L and heat radiation blower supply power P2 are determined and output control is performed (
P m1n in Figure 9 (= P 1m1n + P 2m
1n) ), ie, ΔTa for a given endothermic capacity Qcl in FIG. 7, for example.

Peltier supply power Pla, Plb at ΔTb, ΔTc,
In addition to finding Plc, its Pla, Plb, Pie
Using ∆Ta, ∆Tb, and ∆Tc that were used to find
+P2c), the smallest total power (P1+P2)
is determined and memorized in advance.

Thereafter, the controller 6 returns to step 101.

In this way, in this embodiment, the controller 6 (control means) controls the power supply PI to the thermoelectric element and the power supply to the heat radiation side blower 4 while achieving the required value of the heat absorption amount on the user side of the elements of the electronic refrigeration unit 5. The power supply to the thermoelectric element and the heat radiation side blower 4 is controlled so that the total power of P2 is minimized. As a result, power consumption can be suppressed and efficient operation can be achieved.

Note that this invention is not limited to the above embodiments,
For example, as shown in FIG. 12, a blower 7 is provided upstream of a duct 1.2 having an electronic refrigeration unit 5, and an air volume adjustment damper 8 is provided at a branch part of the ducts 1 and 2.
The control of the heat radiation side and heat absorption side blowers in the above embodiment is performed by the blower 7 and the damper 8. The opening degree of the damper 8 is adjusted so that the amount of air blown by the blower 7 is always at the required air volume level on the heat absorption side, and the power supplied to the blower 7 is always adjusted to the required air volume on the heat radiation side and on the heat absorption side. Outputs the air volume plus the air volume. In addition to the operation in the above embodiment, minimum power control can be achieved by replacing the heat radiation side blower 4 in the embodiment with the blower 7 and performing the same control.

Furthermore, in the above embodiment, a case has been described in which cooling is performed using the heat absorption fins 11 of the thermoelectric element, but in the case of a heating device using the heat radiation fins 12 of the thermoelectric element, an air blower that blows air to the heat absorption fins on the non-use side may be used. , control may be performed while achieving the required value of the amount of heat dissipation on the user side of the thermoelectric element.

〔Effect of the invention〕

As described in detail above, according to the present invention, the excellent effect of suppressing power consumption and enabling efficient operation is exhibited.

[Brief explanation of drawings]

Fig. 1 is an overall configuration diagram of a vehicle air conditioner according to an embodiment, Fig. 2 is a perspective view of an electronic refrigeration unit, Fig. 3 is a side view of the electronic refrigeration unit, and Fig. 4 is a cross section taken along line A-A in Fig. 3. 5 is a sectional view taken along line BB in FIG. 3, FIG. 6 is a sectional view taken along line C-C in FIG. 3, and FIG. 7 is a diagram showing the relationship between supplied power and heat absorption capacity Qc.
Figure 8 is a diagram showing the relationship between the temperature difference and the air flow rate and power of the heat radiation side blower, Figure 9 is a diagram showing the relationship between the temperature difference and the power,
Figure 1O is a flowchart for explaining the operation.
FIG. 1 is a map showing the relationship between the required endothermic surface temperature Tc and the amount of air blown, and FIG. 12 is an overall configuration diagram of a separate vehicle air conditioner. 4 is a heat radiation side blower, 5 is an electronic refrigeration unit, 6 is a controller as a control means, 11 is a heat absorption fin, and 12 is a heat radiation fin. Patent applicant Nippondenso Co., Ltd. Agent Patent attorney On 1) Hironobu (and 1 other person) 5-
Nezumi refrigeration unit 11... Heat absorption fins 12... Heat dissipation fins [9 Figure 111! ! 1 Low Ya-Tc-Ka High Voluntary Procedure Amendment 1. Display of the case 2000 Patent Application No. 154629 2, Name of the invention Electronic refrigeration device 3, Person making the amendment Relationship to the case: Patent applicant address 1-1-4 Showa-cho, Aichi Kokuzoku-shi, agent address 〒 500 2-12-1 Omiyacho, Okigifu City

Claims (1)

[Claims] l. a thermoelectric element having heat dissipation and heat absorption fins; a blower that blows air to the heat dissipation or heat absorption fins on the non-use side of the thermoelectric element; 1. An electronic refrigeration device comprising a thermoelectric element and a control means for controlling power supply to the blower so that the total power of the power supplied to the blower and the power supplied to the blower is minimized.