JPH04136909U - Air flow switching control device - Google Patents

Abstract

(57) [Summary] [Purpose] To perform detailed control of a vehicle blower without increasing the number of parts. [Configuration] First relays 1, 3, 11, 13 and second relays 2, 4, which drive blower motors A, B, C, D, E, F.
12 and 14 are turned on one by one in turn.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a control circuit for a vehicle blower, and relates to an air blowing amount switching control device.

0002

[Conventional technology]

For example, in a blower unit as shown in Fig. 2, four fans a, b, c, d, of which fans a and b relate to one of the ventilation ducts, and fans c and d relates to the other blower duct. In this case, there are four motors A, B, C, and D corresponding to fans a, b, c, and d. As shown in Fig. 3, the first relay 1 and the resistor R L is connected in series, and the second relay 2 is connected in parallel to this resistor RL. , In addition, the first relay 3 and resistor RR are connected in parallel to motors B and C, and the resistor A second relay 4 is connected in parallel to the device RR.

0003 Then, when controlling the motor, first relays 1 and 3 are turned on to operate the fan at low speed. Then, the second relays 2 and 4 are further turned on to rotate the fan at high speed. and However, the control shown in Figure 3 is only capable of switching between two stages: low speed and high speed. stomach. As a result, as shown in FIG. 4, the third relays 5, 6 and the resistors RL1, RR1 By adding (RL<RL1, RR<RR1), for example, 4 stages as shown in the table below. (5 levels including off) air volume control is possible.

0004

[Table 1]

[0005]

[Problem that the idea aims to solve]

However, if you want to perform fine air volume control in four stages, the third relay 5 , 6 and resistors RL1 and RR1 are further required. This invention allows for fine-grained control while using fewer relays and resistors. The purpose of the present invention is to provide an air flow rate switching control device that can perform the following functions.

[0006]

[Means to solve the problem]

The present invention, which achieves the above object, connects a blower motor, a resistor, and a first relay in series. At the same time, connect a second relay in parallel to the above resistor to the power supply. Then, the first relay and the second relay are sequentially turned on one by one. .

[0007]

[Effect]

In addition to turning on the first and second relays separately, If there are multiple controls, you can turn them on one by one for fine-grained control. Air volume can be adjusted in several steps.

[0008]

【Example】

An embodiment of the present invention will now be described with reference to FIG. In Figure 1, there are four frames. For motors A, B, C, and D that correspond to fans, resistors are used for motors A and D. RL and the first relay are connected in series, and the resistor RL is shorted at the second relay 4. , and for motors B and C, the resistor RR and the first relay 3 are connected in series, and the 2 relay 2 has a rotating configuration in which the resistor RR is short-circuited.

[0009] In the configuration shown in FIG. 1, the first relays 1 and 3 and the second relays 2 and 4 are The on/off control provides five stages (OFF, ULo, Lo, Me, Hi) shown in Table 2 below. ) can be controlled.

0010

[Table 2]

[0011] In other words, from low speed to high speed, first relays 1 and 3 for power-on are turned on in order. then turn on the second relays 2 and 4, which short-circuit resistors RL and RR, in order to increase the speed. It is something that will lead to. In this way, the configuration shown in FIG. 1, which is the same as the configuration shown in FIG. Kana control becomes possible.

0012 Although Figure 1 and the explanation so far have been about the blower unit, Figure 5 indicates the blower of the heater unit. That is, as shown in Figure 5(b) When adjusting the air volume for the bus passenger seat heaters 10a and 10b, the motor E , F, first relays 11, 13 in series with resistors Ra, Rb, and Second relays 12 and 14 forming a parallel circuit are configured. Also in this case, fine control is possible by the control shown in the table below.

[0013]

[Table 3]

[0014] In other words, when off, all relays 11, 12, 13, and 14 are off, and the air flow rate U Lo (Ultra Low) performs intermittent on/off control of all relays. -, the first relays 11 and 13 are on, and the first relays 11 and 13 are on at Me (middle). on, intermittent on/off control of the second relays 12 and 14, and Hi (high). All relays 11, 12, 13, and 14 are turned on. For example, by performing the DUTY operation shown in Table 3, even more detailed wind The amount can be adjusted. Further, regarding the heater, the outside operating rate of the air volume adjustment may be changed.

[0015]

[Effect of the idea]

As explained above, according to the present invention, air volume can be increased without adding relays or resistors. Fine adjustments are now possible.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention;

[Fig. 2] Schematic diagram of an example of a blower unit,

[Figure 3] Conventional configuration diagram,

[Fig. 4] Conventional configuration diagram,

[Fig. 5] Regarding heater control, (a) is a configuration diagram, (b) is a heater layout diagram,

[Explanation of symbols]

a, b, c, d fan A, B, C, D motor 1, 3, 11, 13 1st relay 2, 4, 12, 14 2nd relay 5,6 3rd relay RL, RR, Ra, Rb, RL1, RR1 Resistor 10a, 10b heater

Claims (1)

[Scope of utility model registration request] Claim 1: A blower motor, a resistor, and a first relay are connected in series, and a second relay is connected in parallel to the resistor and connected to a power source, and the first relay and the second relay are connected in series. An air blowing amount switching control device characterized by turning on relays one by one in sequence.