JPS5919846B2 - hot water heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a valve structure for a hot water heating system, and is particularly suitable for use in a hot water heating system for automobiles.

In conventional hot water heating systems for automobiles, a flow rate regulating valve is installed in the middle of the hot water piping that connects the hot water discharge part of the automobile engine, which is the hot water source, and the heating radiator installed in the vehicle interior. By moving the operation lever of the flow rate adjustment valve, the valve opening degree is adjusted to adjust the flow rate of hot water, and by adjusting the flow rate of hot water, the amount of heat radiated from the heating radiator is adjusted, and the temperature of the air blown out from the heater is adjusted. was adjusting.

However, in this type of heating system, even if the valve opening of the flow rate adjustment valve is adjusted to optimize the temperature of the blown air, if the rotational speed of the car engine changes, the temperature will be lowered by the car engine. Since the rotational speed of the water pump changes and the hot water pressure changes, if the valve opening remains constant, the hot water flow rate will change, resulting in a problem that the blowing air temperature cannot be maintained at a desired value.

Therefore, in the past, as shown in FIG. 1, a bypass valve 38 was provided separately from the flow rate adjustment valve 24, and when the hot water pressure exceeded the set pressure, the bypass valve 38 was opened and the inside of the case of the flow rate adjustment valve 24 was opened. A portion of the hot water flowing into the heating radiator 1
It has been proposed that the above-mentioned problem can be solved by directly bypassing the flow rate of hot water to the downstream side of the hot water flow rate.

However, in the conventional configuration shown in FIG. 1, when the hot water pressure reaches the set value, the bypass valve 38 opens regardless of the heating conditions. A portion of the hot water flows through the bypass valve 38, and the flow rate of hot water flowing through the heating radiator 15 is reduced.

As a result, there is a drawback that the maximum heating capacity is reduced.

In addition, structurally, the flow rate adjustment valve 24 and the bypass valve 38 each constitute an independent valve device, so the number of parts increases as a whole, which requires a large amount of assembly man-hours, resulting in high costs. There is.

The present invention has been made in view of the above points, and a flow rate adjustment valve and a bypass valve are integrated into a case, and the flow rate adjustment valve has a plate-like shape and is oriented perpendicularly (perpendicularly) to the flow of hot water. By closing the passage of the bypass valve with the flow rate regulating valve itself during maximum heating, it is possible to improve the maximum heating capacity and reduce costs by simplifying the structure of the valve part. The purpose of the present invention is to provide a hot water heating device.

The present invention will be described below with reference to embodiments shown in the drawings.

In FIGS. 2 to 4, 1 is a first case, and 2 is a second case. Both cases 1 and 2 are each made of an integrally molded product of heat-resistant resin such as 66 nylon or Duracon, or guicast metal.

Reference numeral 3 denotes a tubular protrusion of the first case 1, which forms a hot water inlet passage 4.

5 is another tubular protrusion of the first case 1 and forms a hot water outlet passage 6.

A hot water pipe 7 connects the hot water inlet passage 4 to a hot water discharge section (cooling water discharge section) of the automobile engine 8.

A hot water pipe 9 connects the hot water outlet passage 6 to a hot water intake section of the engine 8 via a water pump 10.

11 is a tubular protrusion of the second case 2, and a hot water outlet passage 12
is formed.

13 is another tubular protrusion of the second case 2, which forms a hot water inlet passage 14.

Reference numeral 15 denotes a heating radiator installed in the interior of the vehicle, which radiates heat from the heating air blown by the blower 16.

17 is a hot water pipe that connects the hot water outlet passage 12 of the second case 2 to the inlet of the heating radiator 15; 18 is a hot water pipe that connects the outlet of the heating radiator 15 to the hot water inlet passage 14 of the second case 2; It's plumbing.

19.20 are the flange parts of cases 1 and 2, respectively, and 21
is an annular coupling fitting which is caulked and fixed to the flanges 19 and 20, and serves to couple both cases 1 and 2 together.

Reference numeral 22 denotes a sealing material that maintains a seal between the joint surfaces of the flanges 19 and 20, and is made of an O-ring, a rubber plate, or the like.

23 is a space formed by both cases 1 and 2; 24 is a plate-shaped flow rate regulating valve rotatably housed within this space 23, and is made of heat-resistant resin such as 66 nylon or Duracon.

This plate-shaped flow rate regulating valve 24 is fan-shaped as shown in FIG. 26 rectangular portions 26a are inserted so as to rotate together with the valve 24.

Reference numerals 27a, 27b, 27c, and 27d are flow rate adjustment holes opened in the plate-shaped flow rate adjustment valve 24, respectively, and the flow area thereof increases sequentially from 27a to 27d.

Reference numeral 28 denotes a groove-shaped flow rate adjustment hole opened in the fan-shaped outer peripheral edge of the flow rate adjustment valve 24, and 29 denotes a lever connected to the protruding end of the shaft 26 to the outside of the first case 1, and includes links, wires, etc. (not shown). It is designed to be remotely operated from the control panel section of the heating device via the operating mechanism.

30 is a shaft insertion hole provided in the first case 1, into which the circular portion 26b of the shaft 26 is rotatably inserted and fitted.

30a is a sealing member for keeping the shaft insertion hole 30 sealed, and is made of an O-ring or the like.

31 is an annular groove formed around the hot water outlet passage 12 of the second case 2; 32 is an annular seal plate disposed within the annular groove 31; the annular seal plate 33 is made of an O-ring or the like, and is connected to the annular groove 31; The seal between the two is maintained.

Here, the seal plate 32 is made of a material having a certain degree of elasticity, such as metal such as stainless steel or Sk material, or heat-resistant resin such as 66 nylon or Duracon, and in this example, the cross-sectional shape is as shown in FIG. It is formed in the shape of a spring plate.

34 is a spring guide tube formed into a cylindrical shape with a flange made of heat-resistant resin such as 66 nylon or Duracon, and 35 is a seal plate 32 that connects the flow rate regulating valve 24 via this guide tube 34.
It is a coil spring that pushes it to the side.

Reference numeral 36 denotes an annular groove formed on the end surface of the guide tube 34, which increases the contact surface pressure between the guide tube 34 and the flow rate regulating valve 24.

A bypass passage 37 is formed between the first case 1 and the second case 2 and allows the hot water in the hot water inlet passage 4 of the first case 1 to bypass directly to the hot water outlet passage 6 of the first case 1 as shown by arrow a. ing.

Reference numeral 38 denotes a bypass valve that opens and closes the bypass passage 37 according to the hot water pressure, and is made of a plate-shaped metal spring material, such as stainless steel, and is elastically deformed according to the hot water pressure to adjust the opening degree of the bypass passage 37. The illustrated state shows the valve open state.

When the hot water pressure is low, the bypass valve 38 is seated on the valve seat 39, 40 and closed by the spring action of the valve itself.

The valve seats 39 and 40 are integrally formed with the first case 1 and the second case 2, respectively.

41 is a valve inlet hole formed between the valve seats 39 and 40;
Reference numerals 42 and 43 denote valve support parts that sandwich both ends of the plate-shaped bypass valve 38, and are integrally formed with the second case 2.

44 is a valve support part integrally formed with the first case 1;
In the figure, only one side of the valve support part 44 of the first case 1 is shown, but it goes without saying that the other valve support part is also integrally formed with the first case 1 in the same way as the second case 2.

A sealing material 45 is fixed to the side end surface of the fan-shaped plate-shaped flow rate regulating valve 24 by adhesive or the like, and is made of heat-resistant rubber such as silicone rubber.

In FIG. 3, the maximum heating position of the flow rate adjustment valve 24 is the position at which the flow rate adjustment valve 24 is rotated to the right until the sealing material 45 comes into pressure contact with the valve support portions 42 and 43 of the second case 2. At this maximum heating position, the valve inlet hole 41 of the bypass valve 38 is closed by the sealing material 45 of the flow rate regulating valve 24 itself.
is now blocked.

Reference numeral 46 denotes a stopper surface that determines the hot water cutoff position of the flow rate regulating valve 24, and is integrally formed with the second case 2.

Although not shown, a similar stopper surface is also integrally formed in the first case 1.

Next, the operation of the above configuration will be explained.

In FIG. 3, when the left end surface of the flow rate adjustment valve 24 is in contact with the stopper surface 46, the flow rate adjustment valve 24 closes the hot water outlet passage 12 of the second case 2, so the heating radiator 15 Hot water supply to the area has been cut off.

Then, when the flow rate adjustment valve 24 is rotated in the right direction in FIG. 3 from this state, the flow rate adjustment holes 27a, 27b, 2B
, 27c, and 27d sequentially communicate with the hot water outlet passage 12 of the two cases 2, and as the rotation angle of the flow rate regulating valve 24 increases, the flow rate of hot water to the heating radiator 15 increases.

Thereby, the amount of heat radiated by the heating radiator 15 is adjusted, and the temperature of the blown air is adjusted.

On the other hand, since the water pump 10 that supplies hot water is driven by the automobile engine 8, the hot water pressure will fluctuate as the rotational speed of the automobile engine 8 changes.

Therefore, even if the flow rate adjustment valve 24 is rotated to a predetermined position, the hot water flow rate will fluctuate due to the hot water pressure fluctuation, but in the device of the present invention, The bypass valve 38 operates to adjust the opening degree of the bypass passage 37, so even if the hot water pressure increases, the hot water in the hot water inlet passage 4 of the first case 1 is directly supplied to the hot water outlet passage 6 in an amount corresponding to the pressure increase. Bypass heating radiator 15
The flow rate of hot water to the pump can be maintained at the set flow rate, and therefore the temperature of the blown air can be maintained at the desired set temperature.

Further, at the maximum heating position, the flow rate adjustment valve 24 is rotated to the rightmost position in FIG. 3, and the largest flow rate adjustment hole 27d communicates with the hot water outlet passage 12 of the second case 2.

At the same time, the seal material 4 on the right end surface of the flow rate regulating valve 24
5 is crimped onto the valve support part 42, 43, 44 to open the valve inlet hole 41.
occlude.

As a result, the bypass path 37 always remains closed regardless of the hot water pressure.

Therefore, at maximum heating, the hot water inlet passage 4 of the first case 1
The maximum heating capacity can be improved by allowing the entire amount of hot water supplied to the heating radiator 15 to flow into the heating radiator 15.

In the above embodiment, the bypass valve 38 itself has a spring function, but as shown in FIG. 5, a T-shaped bypass valve 38 is used, and this T-shaped bypass valve 38 has an independent Alternatively, the coil spring 38a may be activated.

Further, in the above embodiment, the side end face of the flow rate regulating valve 24 is used to close the bypass passage 37, but as shown in FIGS. 6 and 7, the first case 1 is adjacent to the hot water outlet passage 6. A notch 47 is formed, and a valve holding cylinder 48 having an elongated cross section is fixed to this notch 47. A T-shaped bypass valve 38 and a coil spring 38a are housed in this holding cylinder 48.
A shielding wall 49 is integrally formed in the case 2, and at maximum heating, the flow rate regulating valve 24 is rotated to the position indicated by the two-dot chain line A in FIG. The flow in the bypass path 37 may be blocked by closing the inlet of the holding cylinder 48 at the surface of the holding cylinder 48 .

In the embodiment shown in FIGS. 6 and 7, no sealing material is attached to the flat part 24a of the flow rate regulating valve 24, but a sealing material such as the sealing material 45 shown in FIG. 3 is attached to the flat part 24a as necessary. It may also be installed by

Conversely, in the embodiments shown in FIGS. 2 to 4, the sealing material 4
It is also possible to abolish 5.

Further, although the plate-shaped bypass valve 38 is supported at two points at both ends in the embodiment shown in FIGS. 2 to 4, it is also possible to support it at one point.

Furthermore, it goes without saying that the present invention can be applied to other hot water heating devices other than automobiles as long as they require the bypass valve 38.

As described above, the present invention can be implemented in various embodiments, and is not limited to the illustrated embodiments.

As described above, according to the present invention, even if the hot water pressure fluctuates in the hot water flow rate adjustment range, the hot water flow rate to the heating radiator 15 can be maintained at the set flow rate by operating the bypass valve 38. Once the flow rate regulating valve 24 is rotated, there is an excellent effect that the temperature of the air blown from the heater according to the rotational position can be maintained as it is without being affected by fluctuations in hot water pressure.

Moreover, since the bypass passage 37 is closed by the flow rate regulating valve itself during maximum heating, all of the hot water supplied from the hot water source to the hot water inlet passage 4 is transferred to the heating radiator 15.
Therefore, all of the supplied hot water can be effectively used for heating, and the maximum heating capacity can be improved compared to conventional devices.

Furthermore, the flow rate adjustment valve 24 and the bypass valve 38 are installed in cases 1 and 2.
Since the flow rate regulating valve 24 is integrated into the flow rate regulating valve 24 and the bypass passage 37 is also blocked by the flow regulating valve 24 itself, the structure of the valve part is very small and simple, which has the excellent effect of reducing costs. .

[Brief explanation of drawings]

Fig. 1 is a hot water circuit diagram showing the configuration of the main parts of a conventional device in cross section, Figs. 2 to 4 show an embodiment of the present invention, and Fig. 2 is a hot water circuit showing the main parts in cross section. 3, and the cross-sectional portion shows the BB cross section in FIG. 3. 3 is a sectional view taken along the line A-A in FIG. 2, FIG. 4 is a partial perspective view of the bypass valve section in FIG. 2, FIG. 5 is a sectional view of main parts showing another embodiment of the present invention, and FIG. The figure is a sectional view of a main part showing still another embodiment of the present invention, and FIG. 7 is a sectional view taken along the line CC in FIG. 6. 1...First case, 2...Second case, 4...Hot water inlet passage, 5...Hot water outlet passage, 8...・Automotive engines that serve as hot water sources;
12...Hot water outlet passage, 14...Hot water inlet passage, 15...Heating radiator, 23...
. . . Space, 24 . . . Flow rate adjustment valve, 27a. 27b, 27c, 27d, 28--Flow rate adjustment hole, 37... Bypass path, 38... Bypass valve.

Claims (1)

[Claims] 1 Adjust the hot water flow rate supplied to the heating radiator to adjust the temperature of the blowing air, and when the hot water pressure reaches a predetermined pressure or higher, open the bypass path of the heating radiator to directly supply a portion of the hot water to the hot water. A hot water heating device configured to return water to a hot water source, the first case having a hot water inlet passage coupled to a hot water discharge part of the hot water source and a hot water outlet passage coupled to a hot water intake part of the hot water source; and a heating radiator. a second case having a hot water outlet passage connected to the inlet of the heating radiator and a hot water inlet passage connected to the outlet of the heating radiator; A plate-shaped flow rate adjustment valve that operates in a direction perpendicular to the flow, and a flow rate of hot water between the hot water inlet passage of the first case and the hot water outlet passage of the second case that are opened to the plate-shaped flow rate adjustment valve. a bypass passage formed in both cases to directly bypass the hot water in the hot water inlet passage of the first case to the hot water outlet passage of the first case; and a bypass valve that opens and closes when the second case's hot water inlet passage and the first case's hot water outlet passage are always in communication, and when the flow rate regulating valve is rotated to a maximum heating position. The hot water heating device is characterized in that the bypass passage is closed by the flow rate regulating valve.