JPH0234420A - Automatic temperature control device with warm water flow adjustment - Google Patents

Abstract

PURPOSE:To provide precise fine heating adjustment with an automatic temp. control device, in which any air mix damper to be otherwise installed between an evaporator and a heater core is eliminated, by furnishing in series a valve for adjustment of the rate of flow and a valve opened and closed freely on the forward path for warm water to the heater core. CONSTITUTION:An evaporator 1 is provided so that cold wind through it all passes a heater core 2, and No.1 solenoid valve 7 is furnished on the forward path 5 for supplying warm water into the heater core 2, and No.2 solenoid valve 8 is arranged so as to adjust the amount of warm water on the flow-in side. The opening and closing timing of No.1 solenoid valve 7 is controlled by No.1 control part on the basis of specified temp. adjustment condition. The degree of opening of No.2 solenoid valve 8 is controlled by No.2 control part alike on the basis of the abovementioned temp. adjustment condition, wherein the degree of opening is lessened compared with other temp. adjustment condition as long as the temp. adjustment condition is in fine heating adjustment mode.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a hot water flow rate adjustable temperature control device for a near conditioner unit that does not use an air mix damper.

[Prior Art] As shown in FIGS. 7(a) and 7(b), the temperature of the air blown out from the heater in a conventional near conditioner unit with a hot water flow rate adjustment type equipped with an air mix damper is determined by the temperature between the evaporator 1 and the heater core 2. An air mix damper system with an air mix damper and a hot water flow rate adjustment type that controls the opening state of the provided air mix damper 3 and the supply timing of hot water circulating in the heater core 2 has been adopted.

In this air mix damper method, first, the opening degree of the damper 3 is adjusted to be fully open or half open, and the heater core 2 is controlled by whether all or only half of the cold air blown from the evaporator 1 passes through the heater core 2. It regulates the amount of hot air that passes through and is heated. The opening state of the damper 3 is determined by the temperature adjustment state selected based on a control element consisting of a plurality of detection signals detected from the evaporator sensor 4, etc.
It is determined whether it is fully open or half open.

On the other hand, the heater core 2 includes an outgoing path section 5 for supplying hot water into the heater core, and a return path section 6 for discharging hot water.
are connected to each other, and hot water for heating the cold air is circulated within the heater core 2. The flow of hot water circulating within the heater core 2 is regulated by a water valve 7, which is an electromagnetic valve that can be opened and closed, provided in the outgoing section 5, and its opening and closing timing is determined according to the selected temperature adjustment state.

Now, the water valve 7 is controlled based on the temperature adjustment state.
The opening/closing timing of the damper 3 and the opening state of the damper 3 are shown in Fig. 8 (a).
L (bL (c) and FIG. 9(a), fb).

Figures 8(a), (b), and (C) show the opening time t of the water valve 7 per cycle in terms of pulse width when the slight heating state, small heating state, and large heating state are selected, respectively. It is expressed. FIG. 8(a) shows the opening state of the damper 3 in a slightly heated state, and in this case, it is in a half-open state. FIGS. 8(b) and 8(C) correspond to a small heating state and a large heating state, and show the damper 3 in a fully open state. Note that the pulse height indicates the amount of hot water supplied into the armpit and is constant regardless of the selected temperature adjustment state.

[Problems to be Solved by the Invention] However, in the slight heating state in the hot water flow rate adjustment method in which the conventional air mix damper cannot be provided, the opening time t of the water valve can only be reduced. As shown, the temperature T of the outlet air for the opening time t during one period of the valve is 0 when the opening time t is 0.
When a small amount of time has passed since then, a significant difference occurs in the temperature T of the air blown out from the heater, and as a result, there is a problem in that accurate and fine-grained slight superheating adjustment is difficult.

In particular, in vehicle near conditioner units, as the number of revolutions of the vehicle engine increases, the amount of hot water supplied to the heater core also increases. The disadvantage is that the difference in temperature T becomes even larger, and even if the opening interval t of the valve per cycle is further shortened, there is a limit to the time control due to the slow reaction characteristics of the fluid, and slight overheating may occur. The current situation was that adjustment was almost impossible.

Moreover, because the near conditioner unit for vehicles has a limited installation space, it is not possible to accommodate an air mix damper, which requires a relatively large space. There was also the fundamental problem that it was impossible to take it.

Therefore, in view of the above drawbacks, the technical problem of the present invention is to be able to perform fine heating adjustment more reliably and precisely than the hot water flow rate adjustment method with an air mix damper, and to provide a system for vehicles that does not require an air mix damper. An object of the present invention is to provide an automatic temperature control device that can adjust the flow rate of hot water and meets the demand for space saving.

[Means for Solving the Problems] According to the present invention, there is provided a heater core for heating air that has passed through an evaporator, an outgoing path section for supplying hot water into the heater core, and a discharge portion for discharging the hot water supplied into the heater core. a first water valve that is provided in the outgoing path and can be opened and closed; and a first control unit that controls opening and closing timing of the first water valve based on a predetermined temperature adjustment state. A double-valve series type hot water flow rate adjustment type automatic temperature control device comprising: a second water valve whose opening degree can be freely adjusted and which is attached to the outgoing path section; A second control section that controls based on the temperature adjustment state is provided, and the second control section is configured to:
A double valve characterized in that the opening degree of the second water valve is made smaller compared to other temperature adjustment states, and the amount of hot water supplied to the heater core during slight heating adjustment is relatively reduced. A serial hot water flow rate adjustable automatic temperature control device is obtained.

Further, according to the present invention, a heater core for heating the air that has passed through the evaporator, an outgoing path section for supplying hot water into the heater core, and a return path section for discharging the hot water supplied into the heater core, A bypass type hot water flow rate comprising: a first water valve provided in the outgoing path section that can be opened and closed; and a first control section that controls the opening and closing timing of the first water valve based on a predetermined temperature adjustment state. The mm type automatic temperature control device includes a bypass path that connects an outgoing path portion of the outgoing path portion located between the first water valve and the heater core to the return path portion, and an opening provided in the bypass path. a second water valve whose temperature can be freely adjusted; and a second control section that controls the opening degree of the second water valve based on the temperature adjustment state; When the adjustment state is fine heating adjustment, the opening degree of the second water valve is made larger than in other temperature adjustment states, and the amount of hot water supplied to the heater core during fine heating adjustment is adjusted. A bypass type hot water flow rate adjustable automatic temperature control device is obtained, which is characterized by relatively decreasing the temperature.

Further, according to the present invention, first and second heater cores are provided for heating the air that has passed through the evaporator, and a first heater core is provided for supplying hot water into the first and second heater cores, respectively.
and a second outgoing path section, first and second return path sections for discharging the hot water supplied into the first and second heater cores, respectively, and a freely openable and closable section provided in the first outgoing path section. 1st
a water valve, a first control section that controls the opening/closing timing of the first water valve based on a predetermined temperature adjustment state, and a second control section that is provided in the second outward path section and whose opening degree can be freely adjusted. a water valve, and a second control section that controls the opening degree of the second water valve based on the temperature adjustment state, and the second control section controls the opening degree of the second water valve based on the temperature adjustment state. When this is the time of fine heating adjustment, the opening degree of the second water valve is made smaller than in other temperature adjustment states, and the amount of hot water supplied to the heater core during fine heating adjustment is made relatively. A two-part heater core type hot water flow one-adjustable temperature control device is obtained.

[Example] Next, an example according to the present invention will be described with reference to the drawings.

However, the same reference numerals as in FIG. 7 represent the same functions, and a description thereof will be omitted.

-First Embodiment- Figures 1fa) and 1(b) show a double valve series hot water flow rate adjustable automatic temperature control device according to this embodiment. The air mix damper 3 shown in FIG. 7 is not provided between the evaporator 1 and the heater core 2, and all the cold air that has passed through the evaporator 1 passes directly through the heater core 2.

The outgoing path portion 5 for supplying hot water into the heater core 2 includes:
A first solenoid valve 7 that can be opened and closed is provided. The opening/closing timing of the first electromagnetic valve 7 is determined by a first control section (not shown) in the ATC amplifier shown in FIG. 1(b).

The first control unit selects a temperature adjustment state based on a plurality of detection signals detected from various sensors (evaporative sensor, water temperature sensor, radiation sensor, outside air sensor, inside air sensor, etc.), and controls the selected temperature adjustment state. The opening/closing timing of the first electromagnetic valve 7 is determined according to the state.

On the other hand, a second solenoid valve 8 whose opening degree can be freely adjusted is connected to the first solenoid valve 7 in order to adjust the amount of hot water passing through the first solenoid valve 7.
It is provided in the outgoing path section 5 located on the inflow side of. The opening degree of the second solenoid valve 8 is adjusted by a second control section (not shown) in the ATC amplifier shown in FIG. 1(b). The second control section adjusts its opening according to the temperature adjustment state selected by the first control section, and only when the temperature adjustment state is fine heating adjustment, the second control section adjusts the opening degree in accordance with the temperature adjustment state selected by the first control section. For example, if the opening degree of the second solenoid valve 8 is set to be half open, the amount of hot water supplied to the heater core 2 during fine heating adjustment is set to be smaller than the opening degree of the second electromagnetic valve 8 (low heating state and large heating state). It works in the direction of relative decrease.

Here, in FIGS. 2(a), (b), and (C),
The opening time t of the second electromagnetic valve 8 per cycle when the slight heating state, small heating state, and large heating state are selected is indicated by the pulse width, and the amount of hot water supplied to the heater core 2 is indicated by the pulse width. Shown in height.

In the slight heating state shown in FIG. 2(a), the second solenoid valve 8 is in a half-open state, so the pulse height is reduced compared to the conventional pulse height shown in FIG. 7(a). . Figure 2(b)
, (c) corresponds to a small heating state and a large heating state, and the second electromagnetic valve 8 is in a fully open state. Note that the opening/closing timing and pulse width are the same as in the conventional case.

Therefore, during slight superheat adjustment, the opening degree of the second solenoid valve 8 is controlled to be smaller, and the amount of hot water supplied to the heater core 2 can be reduced, so that when the opening time t is 0, It was possible to reduce the difference in the temperature T of the air blown out from the heater after a short period of time had passed since then.

1. Second Embodiment - Figures 3(a) and 3(b) show a bypass type automatic temperature control device with hot water flow rate adjustment according to this embodiment.
Since the same symbols as in Figure fa) have the same functions,
The explanation will be omitted.

First, in this embodiment, a bypass path 9 is provided that connects the outgoing path section 5 located between the first solenoid valve 7 and the heater core 2 of the outgoing path section 5 to the return path section 6, and the bypass path 8@ 9 is provided with a second solenoid valve 8 whose opening degree can be freely adjusted. The opening degree of the second solenoid valve 8 is shown in FIG.
) is adjusted by a second control section (not shown) in the ATC amplifier.

In accordance with the temperature adjustment state selected by the first control unit described in the first embodiment, the second control unit changes the temperature adjustment state (heating rate By increasing the opening degree of the second solenoid valve 8, for example, half-open, and bypassing the hot water directly from the outgoing section 5 to the returning section 6, the opening degree of the second electromagnetic valve 8 can be increased compared to the heating state and the heating ON state. The surface < in the direction of relatively decreasing the amount of hot water supplied to the heater core 2.

Here, in the slight heating state shown in FIG. 4(a), the second solenoid valve 8 is in a half-open state, so the pulse height is lower than the conventional pulse height shown in FIG. 7(a). It is decreasing. Second
Figures (b) and (c) correspond to the heating rate state and the heating on state, and show the second solenoid valve 8 in the fully closed state.

Therefore, during slight superheat adjustment, the opening degree of the second solenoid valve 8 is controlled in the direction of increasing, and the amount of hot water supplied to the heater core 2 can be reduced, so that when the opening time t is 0, It was possible to reduce the disparity in the temperature T of the air blown out from the shutter after a short period of time had elapsed since then.

- Third Embodiment - Figures 5(a)' and 5(b) show a two-part heater core type hot water flow M adjustable automatic temperature control device according to this embodiment, which is similar to Figure 2(a). Since the reference numerals have similar functions, their explanations will be omitted.

First, in this embodiment, first and second heater cores 2' and 2'' are obtained by dividing the heater core shown in the first embodiment into two.
are arranged in a direction perpendicular to the flow direction of cold air sent from the evaporator 1, and first and second solenoid valves 7 are installed in each outgoing path section 5', 5'' for supplying hot water to the heater cores 2', 2''. .8 is provided. The opening degree of the second electromagnetic valve 8 is adjusted by a second control section (not shown) in the ATC amplifier shown in FIG. 5(b). The second control section adjusts its opening degree according to the temperature adjustment state selected by the first control section described in the first embodiment, and when the temperature adjustment state is fine heating adjustment. For example, the opening degree of the second solenoid valve 8 is made smaller than in other temperature adjustment states (heating rate state and heating ON state). It works in the direction of relatively reducing the amount of hot water supplied to the heater core 2 at the time.

Here, in the slight heating state shown in FIG. 6(a), the second solenoid valve 8 is in a half-open to fully closed state, so the total amount of hot water to the first and second heater cores 2', 2'' is The height of the pulse indicating this is reduced compared to the conventional pulse height shown in Fig. 7(a). Figs. The second electromagnetic valve 8 is in a fully open state.

Therefore, during slight superheat adjustment, the opening degree of the second solenoid valve 8 is controlled to be small, and the heater cores 2', 2''
Since the total amount of hot water supplied to the heater can be reduced, it is possible to reduce the difference in the heater blown air temperature T when a small amount of time has elapsed since the opening time t was 0.

[Effects of the Invention] As explained above, according to the present invention, fine heating adjustment can be performed more reliably and accurately, and it also meets the demand for space saving for vehicles that do not require an air mix damper. An automatic temperature control device with adjustable hot water flow rate can be provided.

Margin below

[Brief Description of the Drawings] Figures 1(a) and 1(b) are conceptual diagrams and a block diagram of a control system of the first embodiment of the present invention, and Figure 2(a) is a block diagram of the control system.
, (b), and (C) are concepts that show the opening/closing timing of the first solenoid valve and the amount of hot water supplied to the heater core in pulses when the slight heating state, small heating state, and heating on state are selected. 3(a) and 3(b) are conceptual diagrams and block diagrams of the control system of the second embodiment of the present invention,
Figures 4 (a), (b), and (C) show the opening/closing timing of the first solenoid valve and the amount of hot water supplied to the heater core when the slight heating state, small heating state, and heating on state are selected. FIGS. 5(a) and 5(b) are conceptual diagrams showing the pulses in pulses, and FIG. 6(a) is a conceptual diagram of a third embodiment of the present invention and a block diagram of the control system. (b) and (C) are conceptual diagrams showing the opening/closing timing of the first solenoid valve and the amount of hot water supplied to the heater core in pulses when the slight heating state, small heating state, and heating on state are selected. , Figures 7(a) and (b) are conceptual diagrams and control system block diagrams of the conventional example, and Figures 8(a) and (b).
, (c) is a conceptual diagram showing in pulses the opening/closing timing of the first solenoid valve and the amount of hot water supplied to the heater core when the slight heating state, small heating state, and large heating state are selected; Figures (a) and (b) are conceptual diagrams showing the relationship between the opening degree of the air mix damper and the flow of cold air when the slight heating state, small heating state, and large heating state shown in Fig. 8 are selected. , FIG. 10 is a correlation diagram of the heater blown air temperature T versus the opening time t during one cycle of the valve in the conventional example shown in FIG. 1... Evaporator, 2... Heater core, 3...
Air mix damper, 4... Eva sensor, 5... Outgoing path section, 6... Return path section, 7... First solenoid valve, 8.
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Claims (3)

[Claims] 1. A heater core for heating the air that has passed through the evaporator, an outgoing path section for supplying hot water into the heater core, a return path section for discharging the hot water supplied into the heater core, and an opening/closing section provided in the outgoing path section. a first water valve that is freely adjustable; and a first water valve that controls opening and closing timing of the first water valve based on a predetermined temperature adjustment state.
A double-valve series hot water flow rate adjustment type automatic temperature control device having a control section, a second water valve whose opening degree can be freely adjusted and which is attached to the outgoing section, and an opening degree of the second water valve. and a second control section that controls the temperature adjustment state based on the temperature adjustment state, and when the temperature adjustment state is a slight heating adjustment time, the second control section controls the temperature adjustment state based on the temperature adjustment state. In addition, the opening degree of the second water valve is made smaller to relatively reduce the amount of hot water supplied to the heater core during fine heating adjustment. Automatic temperature control device. 2. A heater core for heating the air that has passed through the evaporator, an outgoing path section for supplying hot water into the heater core, a return path section for discharging the hot water supplied into the heater core, and an opening/closing section provided in the outgoing path section. a first water valve that is freely adjustable; and a first water valve that controls opening and closing timing of the first water valve based on a predetermined temperature adjustment state.
A bypass type hot water flow rate adjustment type automatic temperature control device having a control section, the bypass connecting an outgoing section of the outgoing section located between the first water valve and the heater core to the return section. a second water valve that is provided in the bypass passage and whose opening degree can be freely adjusted; and a second control unit that controls the opening degree of the second water valve based on the temperature adjustment state. , the second control unit increases the opening degree of the second water valve when the temperature adjustment state is a slight heating adjustment compared to other temperature adjustment states, and performs a slight heating adjustment. A bypass type hot water flow rate adjustment type automatic temperature control device, characterized in that the amount of hot water supplied to the heater core during adjustment is relatively reduced. 3. first and second heater cores for heating the air that has passed through the evaporator; first and second outward passage sections for supplying hot water into the first and second heater cores; first and second return passages for discharging hot water supplied into the heater core, respectively; a first water valve that is provided in the first outgoing passage and is openable and closable; and the first water valve. a first control section that controls the opening and closing timing of the opening and closing timing based on a predetermined temperature adjustment state; a second water valve that is provided in the second outward path section and whose opening degree can be freely adjusted; and the second water valve. and a second control unit that controls the opening degree of the temperature control unit based on the temperature adjustment state, and when the temperature adjustment state is the fine heating adjustment, the second control unit controls the opening degree of the other temperature. A two-part heater core hot water system, characterized in that the opening degree of the second water valve is made smaller compared to the adjusted state, and the amount of hot water supplied to the heater core during fine heating adjustment is relatively reduced. Flow rate adjustable temperature control device.