WO2009116254A1

WO2009116254A1 - Thermo valve and heat medium circuit including same

Info

Publication number: WO2009116254A1
Application number: PCT/JP2009/001128
Authority: WO
Inventors: パク・ヒー・ワン; 鈴木高智; 高橋賢
Original assignee: 富士精工株式会社; 高麗電子株式会社
Priority date: 2008-03-19
Filing date: 2009-03-13
Publication date: 2009-09-24
Also published as: JP5424567B2; JP2009222217A

Abstract

Provided are a thermo valve with a simple, low-cost, lightweight, and compact structure capable of optimally controlling the flow of a heat medium while achieving a low pressure loss and a heat medium circuit including the thermo valve. A thermo valve (1, 100, 200, 300) installed in a heat medium circuit in which a heat medium flows comprises a valve element that is operated in a direction along the flow of the heat medium, and a temperature sensitive movable portion (2) for driving opening/closing of the valve element in the direction along the flow of the heat medium by using a thermally actuated operation corresponding to the temperature of the heat medium, and controls the flow of the heat medium according to the temperature of the heat medium. The valve element is constituted of a coil spring valve element (3, 103, 203, 230, 303) that is opened/closed by an increase/decrease in the passage section of a flow path of the heat medium caused by the change of gaps in a winding portion that expands and contracts in response to the thermally actuated operation of the temperature sensitive movable portion (2).

Description

THERMO VALVE AND HEAT MEDIUM CIRCUIT HAVING THE THERMO VALVE

The present invention uses a heat medium (hereinafter sometimes referred to as “cooling liquid” or “warm water”) circulating to cool an internal combustion engine or the like, or exchanges heat from a heat source such as a boiler. A temperature-sensitive movable part ("", which is arranged in a heat medium circuit including a terminal device (such as an automobile heater core or a building heating core) that circulates and exchanges heat, and moves forward and backward according to the temperature of the heat medium. The present invention relates to a thermo valve (valve mechanism) and a heat medium circuit for controlling the flow of a heat medium by utilizing the thermal response of a “thermo pellet”, “thermo element” or the like.

With recent advances in environmental technology, automotive engine cooling systems include terminal devices (such as heater cores) that exchange heat with coolant in addition to the main coolant circuit for engine cooling (heat insulation). Many coolant circuits have been combined.

A heater circuit for vehicle compartment heating is a classic example, but in recent years, for example, for warming and keeping engine oil, for warming and keeping mission oil, for cooling EGR gas, Those for recovering exhaust heat and those for storing exhaust heat have come to be combined.

Against the background of such technological progress, it is arranged in a coolant circuit including a terminal device (such as a heater core) that exchanges heat with the coolant of the engine cooling system, and the flow path in the circuit is opened (the flow rate is increased). ) Or a valve mechanism that can be closed (reducing the flow rate) or an engine cooling system in which the valve mechanism is arranged has been proposed.

For example, Patent Document 1 discloses a mechanical valve mechanism that reduces the opening as the temperature of cooling water changes from a low temperature side to a high temperature side, and an engine cooling system system including such a valve mechanism. .

Patent Document 2 includes a mechanical control valve mechanism that increases the opening when the temperature of the refrigerant is high and decreases the opening when the temperature of the refrigerant is low, and such a valve mechanism. An engine cooling system is disclosed.

In Patent Document 3, a transmission heat exchanger is provided in series on the downstream side of the heater core in the heater passage for returning the cooling water discharged from the cylinder head side to the cylinder block side through the heater core, and the heat exchange for the transmission A bypass passage that branches off between the heater and the heater core and joins downstream of the transmission heat exchanger, and includes a valve mechanism that controls flow distribution to the bypass passage, and includes cooling water to the heater core. A first state in which the flow rate is relatively large and the cooling water flow rate to the transmission heat exchanger is relatively small, and the transmission heat exchange is performed by relatively reducing the cooling water flow rate to the heater core. An engine cooling system is disclosed that can ensure, as necessary, either a second state in which the flow rate of cooling water to the vessel is relatively large.

For example, in Patent Document 4, a heater passage similar to that in Patent Document 3 is secured, and if necessary, cooling water diverted from the downstream of the heater core 13 of the heater passage 6 passes through the transmission heat exchanger 14. Flow path for warm-up returning to the cylinder block 1a side (see Y1 in FIG. 1 of Patent Document 4) and cooling flow for returning the cooling water in the cylinder block 1a to the cylinder block 1a side via the transmission heat exchanger 14 An engine cooling system is disclosed that includes a valve mechanism as switching means for securing either one of the paths (see Y2 in FIG. 2 of Patent Document 4).

As described in Patent Literature 1 to Patent Literature 4 and the like, in the engine cooling system and the like exemplified above, the temperature sensitivity that moves forward and backward according to the temperature of the heat medium (= cooling liquid, for example, “cooling water”). Control of flow channel opening (increasing flow rate) or closing (decreasing flow rate), flow rate distribution ratio control at flow channel branching, mixing ratio control at flow channel merging using thermal response of moving parts, flow It can be seen that a valve mechanism (thermo valve) capable of path switching control is useful.

These valve mechanisms (thermo valves) do not mean that when the valve is “closed”, the flow path of the heat medium is completely closed and no leakage is allowed. It is allowed to be in a “closed” state with a little flow. In particular, if the valve mechanism (thermovalve) is a valve mechanism (thermovalve) that increases or decreases the flow rate using the thermal response of the temperature-sensitive movable part that moves forward and backward according to the temperature of the heat medium, It is necessary to maintain the temperature sensing performance of the temperature sensing movable part by leaving a small amount of flow to be in the “closed” state.

A conventional valve mechanism that increases or decreases the flow rate using the thermal response of the temperature-sensitive movable portion that moves forward and backward according to the temperature of the heat medium as described above (for example, in Patent Document 1 and Patent Document 2) The valve mechanism (thermovalve) as shown is compared to the one that is controlled to open and close by control means (including an electronic control circuit and a temperature sensor) provided outside the engine cooling device as shown in Patent Document 5. For example, the flow rate control according to the temperature of the heat medium can be realized with a relatively simple configuration.

Also, in floor heating systems and indoor heating systems that use a heat medium (for example, hot water) heated by a heat source such as a boiler, heat pump, cogeneration system, etc., a plurality of heat medium circuits (floor heating in a plurality of rooms) for obtaining heat For heating that combines a header (branch bracket) with an on-off valve at each branch port, and a header on the return side to distribute and supply the heat medium to the heat medium circuit that supplies heat to the air conditioning system) Header devices are known.

If a header device that distributes heat from a heat source to a plurality of heat medium circuits is used to supply a heat medium appropriately heated to a floor heating or air conditioning system in a plurality of rooms, the heat medium is supplied to a certain heat medium circuit in operation. However, there is a possibility that the required heating capacity cannot be exhibited due to a lack of supply of the heat medium to another heat medium circuit in operation. Excessive heating is harmful and the lack of heating capacity is particularly problematic when it is required.

Therefore, in order to properly distribute the heat medium to a plurality of such heat medium circuits for heating, a constant flow valve whose flow rate is set in advance is assembled to the header (see Patent Document 6), In order to keep the pressure difference between the header on the supply side and the header on the return side within a certain range, a bypass circuit is provided between the header on the supply side and the header on the return side, and a differential pressure control valve is arranged in the bypass circuit. The thing (refer patent document 7) is disclosed.

Such a system capable of appropriately distributing a heat medium to a plurality of heat medium circuits can eliminate the need for manual flow rate setting at the construction site, which is considered to be very troublesome.

As described above, in a floor heating system or an indoor heating system using a heat medium heated by a heat source, a valve mechanism capable of appropriately distributing a flow rate to a plurality of heat medium circuits according to demand is useful. You can see that

JP 2007-120380 A JP 2007-205197 A Japanese Patent Laid-Open No. 2007-224821 JP 2007-224819 A JP 2002-235544 A Japanese Patent Laid-Open No. 9-210380 JP 2000-266298 A

Here, in the engine cooling system for automobiles, conventionally, the valve mechanism (thermovalve) as described above is often omitted in consideration of cost and the like in the heater circuit for heating the passenger compartment. In order to adopt a new thermo valve in a heater circuit or in a number of new circuits that have increased in recent years, in addition to having a great effect (value) by adopting these, the price is low. It must be lightweight. In light of this point, the above-described conventional thermovalves (for example, the thermovalves shown in Patent Document 1 and Patent Document 2) have a complicated structure, a large number of parts, and a high cost.

The conventional thermo valve (the thermo valve as shown in Patent Document 1 and Patent Document 2) has a disc-like main valve body so as to face the flow of the circulating coolant. Has been placed. For this reason, the main valve body is blocked so as to become an obstacle to the flow of the coolant from the inlet side opening of the thermo valve toward the outlet side opening, and even in the open state (a slight deliberate temperature sensitivity) The main part of the coolant (except for the flow through the leak hole for use) bypasses the outer part of the main valve body and flows, resulting in poor flow efficiency and large flow path resistance (pressure loss). .

In such a conventional thermo valve, in order to fundamentally reduce the flow resistance (pressure loss), it is necessary to increase the size of the main valve, and the entire thermo valve becomes large, thus reducing cost and weight. Incompatible with chemistry. Moreover, there is a concern that fine control of the flow rate becomes difficult.

Further, in the conventional thermo valve, the main part of the coolant flows around the outer part of the main valve body, so that the coolant is discharged from the temperature-sensitive movable part arranged near the center axis of the disk-shaped main valve body. The flow line is kept away, and it is difficult to secure the flow rate of the coolant around the temperature-sensitive movable part, and the area around the temperature-sensitive movable part tends to become stagnation and difficult to contact with the circulating coolant. There is an aspect that the temperature of the coolant cannot be quickly and accurately captured.

Further, in recent automobile cooling systems, as described above, a large number of coolant circuits have been combined, and there are aspects in which each coolant circuit competes for coolant. It is desirable to allow the coolant to be properly distributed to other circuits without causing the coolant to flow more than necessary into a particular coolant circuit. That is, it should be optimally distributed according to the cooling demand and heat demand of each coolant circuit, or according to priority.

More specifically, for example, a coolant circuit including a heater core in an automobile cooling system should preferentially distribute the coolant heated by the engine when there is a heat demand for vehicle interior heating. It can be said to be a circuit. However, when there is no heat demand, it is not necessary to send an unnecessarily high flow rate (heat amount) to the heater circuit even if there is a heat demand. In conditions where sufficient flow rate can be obtained (for example, when the rotation speed of the engine to which the water pump is coupled exceeds a certain rotation speed), the flow rate supplied to the heater circuit is limited, It is desirable that the coolant can be distributed so as to meet the heat demand and cooling demand of the coolant circuit, and a thermo valve capable of meeting such a demand is required.

By the way, even in a floor heating system or an indoor heating system using a heat medium (for example, hot water), it should be optimally distributed according to the heat demand of each heat medium circuit or according to priority. Therefore, a thermo valve that can be controlled to reduce or increase the flow rate of the heat medium according to the temperature of the heat medium is useful. However, when installing a thermo valve in a plurality of heat medium circuits, the thermo valve is useful. The valve is required to be low cost. However, a conventional thermo valve (for example, a thermo valve as shown in Patent Document 1 and Patent Document 2) has a complicated structure, a large number of parts, and a high cost.

Further, in a floor heating system or an indoor heating system using a heat medium (for example, hot water), as disclosed in Patent Document 6, it is necessary to set a flow rate to each heat medium circuit, and the flow rate is set in advance. Some constant flow valves are unitized at each branch port of the header. However, the constant flow valve as shown in FIG. 3 of Patent Document 6 has a large pressure loss, and a large pump power is required to sufficiently feed the heat medium to each heat medium circuit, so that energy consumption through power consumption is reduced. There is a fear that it will grow. In addition, a large-scale pump is required for the system, which may lead to high costs and a reduction in installation flexibility.

Furthermore, in the constant flow valve (and system) disclosed in Patent Document 6, the terminal device (floor heating panel or indoor unit) provided in each heat medium circuit is set only by presetting the flow rate to each heat medium circuit. Heating radiator core etc.) There is no function to distribute the heat medium in a well-balanced manner depending on the heat demand. In other words, on the assumption that the heat demand of each terminal device fluctuates, a small flow rate should be used for terminal devices with low heat demand, and as much flow rate as possible should be provided for terminal devices with high heat demand in an optimal balance for the current situation. There is no function to distribute.

Similarly, in the system disclosed in Patent Document 7, the flow rate of each heat medium circuit is stabilized regardless of the use state of the other heat medium circuits by always keeping the differential pressure between the supply header and the return header constant. However, even in this system, the function of distributing the heat medium in a well-balanced manner depending on the magnitude of the heat demand of each terminal device (floor heating panel, indoor heating radiator core, etc.) provided in each heat medium circuit There is no. In other words, on the assumption that the heat demand of each terminal device fluctuates, a small flow rate should be used for terminal devices with low heat demand, and as much flow rate as possible should be provided for terminal devices with high heat demand in an optimal balance for the current situation. There is no function to distribute.

The present invention has been made in view of such circumstances, and a thermo valve capable of optimally controlling the flow of a heat medium while achieving low pressure loss while having a simple, low cost, light weight, and compact configuration. And it aims at providing the heat carrier circuit provided with the said thermo valve.

Therefore, the thermo valve according to the present invention is
While being interposed in the heat medium circuit through which the heat medium flows,
A valve body that is operated in a direction along the flow path of the heat medium, and a temperature sensing device that opens and closes the valve body in a direction along the flow path of the heat medium by using a heat-responsive operation according to the temperature of the heat medium. A movable part,
A thermo valve that controls the flow of the heat medium according to the temperature of the heat medium,
A coil spring valve body that is opened and closed by increasing or decreasing the passage cross-sectional area of the flow path of the heat medium due to a change in the gap of the winding part due to the expansion and contraction of the valve body in conjunction with the thermal response operation of the temperature-sensitive movable part It is characterized by comprising.

The thermo valve according to the present invention is
A thermo valve that is interposed in a heat medium circuit through which the heat medium flows and controls the flow of the heat medium according to the temperature of the heat medium,
A temperature-sensitive movable part that opens and closes the valve body using a heat-responsive operation according to the temperature of the heat medium;
A first housing having a flow path through which the heat medium flows, and a support portion protruding inside the flow path to support and fix a part of the temperature-sensitive movable portion;
A second housing having a flow path through which the heat medium flows, and having a guide portion that protrudes inside the flow path and supports and guides the advancing and retreating portion of the temperature-sensitive movable portion;
The flow path of the heat medium is arranged in a valve chamber formed at an intermediate position between the support portion and the guide portion, and the heat medium flow path is changed by a gap change of the winding portion by being expanded and contracted in conjunction with the heat-responsive operation of the temperature-sensitive movable portion. A coil spring valve body that is opened and closed by increasing or decreasing the passage cross-sectional area of
It is characterized by including.

Thus, the thermo valve according to the present invention employs a coil spring valve element, and thus can be configured extremely simply. Since the number of parts is smaller than that of the conventional thermo valve and the number of assembling steps can be reduced, the cost can be reduced.

Further, for example, in the conventional thermo valve as shown in Patent Document 1 and Patent Document 2, a part for fixing and integrating the disc-like valve body to the movable part of the temperature-sensitive movable part is necessary, Its assembly is required. In the thermovalve disclosed in Patent Document 1, for example, a snap ring for regulating the position of a valve body biased by a spring with respect to a shaft, or a part called a “retainer” (reference numeral in FIG. 3 of Patent Document 1). 228 etc.) is necessary. On the other hand, in the thermo valve according to the present invention, since the coil spring valve body is adopted, these snap rings, retainers and the like can be omitted.

In addition, the return operation of the advancing / retreating part of the temperature-sensitive moving part that moves forward / backward to the initial position (original position) is ensured by urging by an urging means such as a spring. The thermo-valve using thermal response normally requires a biasing means for returning the temperature-sensitive movable part to the initial position of the advancing / retreating moving part. However, the thermo-valve according to the present invention has a valve body with a coil spring. Therefore, the valve body can also serve as an urging means (return spring). Thereby, it can contribute to reduction of a number of parts.

As described above, if the coil spring valve body also serves as the urging means, the coil spring as the mere urging means can be eliminated, so that the heat medium (cooling liquid) is a coil spring line as the urging means. By crossing between and passing the vicinity, it is possible to suppress the generation of flow resistance (pressure loss) due to turbulence and turbulence of streamlines.

When the coil spring valve body is in the open state, the heat medium can flow between the spring wire members of the coil spring valve body.
Thereby, like the conventional thermo valve as shown in patent documents 1 and patent documents 2, the main valve body has taken the shape of a disk, and is arranged so that the flow of the circulating heat medium may be blocked. , Against the circulation of the heat medium from the opening on the inlet side to the opening on the outlet side, the main valve body is blocked so that it becomes an obstacle, and even in the opened state (the circulation by a slight temperature-sensitive leak hole The main part of the flow of the heat medium does not have to circulate around the outer shape of the main valve body, so that the heat medium has a smoother linear flow, The effect of reducing the flow resistance (= pressure loss) can be achieved.

This effect is most effective when linearly arranged from the inlet side opening of the thermo valve through the main valve body to the outlet side opening as shown in Patent Document 1 and Patent Document 2, The same effect can be obtained even if the axis of the inlet opening and the axis of the outlet opening are bent and not in a linear relationship.

The conventional thermo valve, in which the main part of the flow of the heat medium must circulate around the outer shape of the main valve body, has to secure a passage space for the heat medium outside the main valve body, and the size is increased. However, the thermo valve using the coil spring valve body according to the present invention enables a more compact design.

Therefore, the thermo valve according to the present invention can be a compact design and a low pressure loss thermo valve. Therefore, the possibility of wide adoption can be expanded, and the low pressure loss performance can be reduced by reducing the diameter of the piping path of the heat medium circuit and reducing the size of the heat medium delivery pump. Can contribute to cost reduction.

In the thermo valve according to the present invention, the first housing supports and fixes a flow path through which the heat medium flows, an arm extending from an inner wall of the flow path, and a part of the temperature-sensitive movable portion supported by the arm. Are formed by integral molding, and the second housing has a flow path through which the heat medium flows, an arm extending from the inner wall of the flow path, and an advance / retreat moving member of the temperature-sensitive movable section supported by the arm. And a support guide portion that supports and guides the substrate.

Thus, the first housing having the flow path through which the heat medium flows, the arm, and the support portion is integrally formed by injection molding or the like, while the flow path through which the heat medium flows, the arm, and the support If the second housing having the guide portion is integrally formed by injection molding or the like, it is easy to manufacture, easy to assemble, and can be reduced in cost. The possibility of adopting a thermo valve can be increased.

Furthermore, in the present invention, the coil spring valve body can be constituted by a taper coil spring (which is formed by winding a spring wire in a substantially truncated cone shape) in a predetermined compressed and crushed state.

With such a configuration, the vicinity of the temperature-sensitive movable part arranged near the central axis of the coil spring valve body is less likely to become stagnation, and it becomes easy to secure the flow rate of the heat medium around the temperature-sensitive movable part, Since the heat medium and the temperature-sensitive movable part can be easily contacted, the temperature of the circulating heat medium can be quickly and accurately captured. In particular, when the coil spring valve body is moved from the fully open state to the maximum throttle state, the taper coil spring constituting the coil spring valve body is crushed from the large diameter side so that the flow rate is controlled. Despite a decrease, the flow velocity on the small-diameter side (= near the temperature-sensitive movable part) can be secured, so that the temperature-sensitive movable part can quickly and accurately capture the temperature of the circulating heat medium. become able to. Therefore, it is possible to provide a thermo valve with high accuracy and good response.

The thermo valve according to the present invention may include a return spring that biases the advancing / retreating part of the temperature-sensitive movable part to return to the original position.

Further, in the thermo valve according to the present invention, a branch or junction of the heat medium circuit is formed in the first housing or the second housing forming the valve chamber, and the temperature-sensitive movable portion of the temperature chamber is formed in the valve chamber. Another coil spring valve body that opens and closes in conjunction with the thermal response operation is provided, and the temperature-sensitive movable part drives the opening and closing of the plurality of coil spring valve bodies, so that the distribution ratio of the heat medium branches or the mixing ratio of the confluence Can be controlled.

Accordingly, the thermo valve according to the present invention can have a function of branching the flow path (distribution of the heat medium), joining the flow paths (mixing of the heat medium), and switching the flow path in the heat medium circuit. .

In addition, since it is possible to control a plurality of coil spring valve bodies with a single temperature-sensitive movable part, the flow of the heat medium is more optimally controlled according to the temperature of the heat medium while maintaining low cost. can do.

Further, the thermo valve according to the present invention has a differential pressure across the front and rear so that when the instantaneous flow rate of the heat medium passing through the coil spring valve body exceeds a threshold value, the coil spring valve body functions as a constant flow valve. Accordingly, the thermosensitive movable part can be expanded and contracted independently of the thermal response.

This makes it possible to add a function of high-cut flow without additional parts to the thermo valve that controls the flow of the heat medium according to the temperature of the heat medium. Therefore, the flow of the heat medium can be more optimally controlled according to the temperature and the differential pressure of the heat medium while maintaining the low cost.

The thermo valve according to the present invention can control the flow of the heat medium according to the temperature and the differential pressure of the heat medium with high accuracy and responsiveness while being low in cost. The heat medium circulation system (heat medium circuit) that can control the flow of the heat medium according to the temperature and the differential pressure of the heat medium with high accuracy and responsiveness at low cost. ) Can be provided.

In addition, by providing the thermovalve which concerns on this invention in the downstream of the terminal device which distribute | circulates a heat medium and heat-exchanges, this thermovalve can measure the grade of the heat demand of the said terminal device, and the cooling demand. .

That is, for example, the temperature of the coolant in the cooling system main circuit for cooling the engine is controlled to a substantially constant stable temperature by a thermostat or the like after the warm-up is completed. Therefore, the coolant temperature supplied to the coolant circuit branched therefrom can be predicted in advance. On the other hand, the coolant flows in, and the coolant temperature on the downstream side of the terminal device that exchanges heat with the coolant changes depending on the result of the heat exchange. If the terminal device needs a lot of heat, the temperature of the coolant on the downstream side of the terminal device becomes lower than the temperature of the supplied coolant. Conversely, if the terminal device needs a lot of cooling (release of heat to the coolant), the coolant temperature on the downstream side of the terminal device becomes higher than the supplied coolant temperature. Therefore, if the thermo valve according to the present invention is disposed downstream of the terminal device and the temperature of the coolant is sensed downstream of the terminal device, the degree of heat demand / cooling demand of the terminal device. Thus, it is possible to control distribution of the heat medium according to fluctuations in the heat demand and cooling demand of the terminal device.

The same applies to the case where the thermo valve according to the present invention is applied to a heat medium circuit for heating a building, for example. If the temperature of the heat medium can be sensed on the downstream side of a terminal device (such as a floor heating panel or a room heating radiator core) provided in each heat medium circuit, the heat of the terminal device can be detected. The degree of demand can be measured, and the distribution control of the heat medium according to the fluctuation of the heat demand of the terminal device becomes possible.

As described above, on the assumption that the heat demand and cooling demand of each terminal device fluctuate by using the thermo valve according to the present invention, the flow rate of the heat medium is small for the terminal device with little heat demand and cooling demand. The flow rate is as high as possible for terminal devices with high demand for heat and cooling, and with the flow high cut function (= constant flow valve function), it is possible to maintain the current state without distributing more than necessary. A system capable of distributing the heat medium in an optimal balance can be realized with a simple and inexpensive configuration and without requiring a complicated control system.

According to the present invention, a thermo valve capable of optimally controlling the flow of a heat medium while achieving a low pressure loss while having a simple, low cost, light weight, and compact configuration, and a heat provided with the thermo valve. A media circuit can be provided.

Hereinafter, embodiments of a thermo valve according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the examples described below.

A thermo valve 1 according to Embodiment 1 of the present invention will be described with reference to FIGS. 1 and 2.
The thermo valve 1 according to the present embodiment exchanges heat by circulating a heat medium circulating to cool an internal combustion engine or the like, or exchanges heat by circulating a heat medium warmed by a heat source such as a boiler. It can be disposed in a heat medium circuit including a terminal device (such as a heater core for an automobile or a radiator core for heating a building).

As shown in FIG. 1, the thermovalve 1 includes a temperature-sensitive movable part (thermally responsive part) 2 that moves forward and backward according to the temperature of the heat medium, and includes a temperature-sensitive movable part 2 that houses the temperature-sensitive movable part 2. 1 housing part 10 and second housing 20 are provided.
The temperature-sensitive movable unit 2 includes a temperature sensing unit 2B that encloses a thermal expansion body such as wax that expands and contracts by sensing the temperature of the heat medium, and an extension portion 2C (which corresponds to a forward / backward moving portion). A piston rod 2A that extends and contracts in the vertical direction in FIG. 1 (A) in accordance with the thermal expansion and contraction of the thermal expansion body in the temperature detection unit 2B and its extension 2C protrudes from the temperature detection unit 2B. ing.

As shown in FIGS. 1A and 1D, the first housing 10 has an opening 11 connected to the heat medium circuit, and is attached to the arm 12 extending from the inner wall substantially integrally. A support portion 13 that supports the tip of the piston rod 2 </ b> A of the temperature movable portion 2 is provided.
As shown in FIGS. 1 (A) and 1 (C), the second housing 20 has an opening 21 connected to the heat medium circuit, and is attached substantially integrally to an arm 22 extending from the inner wall. The extension of the temperature sensing unit 2B that slidably supports the extension 2C of the temperature sensing unit 2B of the temperature movable unit 2 and moves along the vertical direction in FIG. 1A according to the expansion and contraction of the piston rod 2A. A guide part (guide part) 23 for movably guiding the part 2C is provided.

Here, as shown in FIG. 1A and the like, a coil spring valve body 3 in which a spring wire (winding) is wound in a substantially truncated cone shape is inserted in the outer periphery of the extending portion 2C. The coil spring valve body 3 includes a step portion 2D which is a step portion of a connecting portion between a relatively large diameter portion of the temperature sensing portion 2B of the temperature sensitive movable portion 2 and a relatively small diameter extending portion 2C, and a coil The small diameter side of the spring valve body 3 is disposed so as to abut.
On the other hand, the large diameter side of the coil spring valve body 3 is disposed so as to be supported by a step portion 24 which is a step portion provided in the second housing 20.

Therefore, when the spring rod 3 is moved in the downward direction in FIG. 1 (A), the piston rod 2A is expanded in accordance with the thermal expansion / contraction of the temperature sensing unit 2B. Further, compression is performed by the step portion 2D on the small diameter side and the step portion 24 of the second housing 20 on the large diameter side.
As the coil spring valve body 3 is compressed, the gap between the spring wire rods becomes smaller and shifts to the valve closed state, and as the coil spring valve body 3 extends from the valve closed state, the gap between the spring wire rods becomes larger and the valve spring opened state. And function to migrate.

Here, the thermo valve 1 according to the present embodiment can be assembled as follows, for example.
That is, for example, the coil spring valve body 3 is inserted and accommodated in the second housing 20, and the large diameter side of the coil spring valve body 3 is placed on the stepped portion 24 of the second housing 20.
Then, the lower part in FIG. 2 of the extending part 2C of the temperature-sensitive movable part 2 is inserted into the small diameter side of the coil spring valve body 3, and further to the guide part 23 of the second housing 20, and in this state, the first housing 10 is inserted. The thermovalve 1 can be assembled by bringing the joint flange 14 of the first housing 10 and the joint housing part 25 of the second housing 20 together.
However, the assembly method and procedure are not limited to those described above, and can be changed as appropriate.
The first housing 10 and the second housing 20 can be, for example, resin molded products, and can adopt an appropriate bonding method such as bonding by an adhesive, ultrasonic welding, or laser welding. It is.

By the way, in the present embodiment, the first housing 10 and the second housing 20 are configured as separate bodies and are described as being joined after incorporating the interior elements, but the present invention is not limited to this. For example, the first housing 10 and the second housing 20 are integrally formed by injection molding or the like, and one of the openings through which the heat medium flows is formed to a size that allows each of the interior elements to pass through. It is also possible to assemble the thermovalve 1 by inserting each element internally provided from the outside through the opening, and supporting and fixing them in a predetermined position by a snap ring or the like.
As explained above, according to the thermovalve 1 using the coil spring valve body 3 according to the present embodiment, a very simple configuration can be achieved. Since the number of parts is less than that of the conventional thermo valve and the number of assembly steps can be reduced, the cost can be reduced.

Here, based on FIG. 1 (A) and FIG. 1 (B), the operation | movement of the thermo valve 1 which concerns on a present Example is demonstrated.
FIG. 1A shows a case where the heat medium has a relatively low temperature. In such a case, the temperature sensing part 2B of the temperature-sensitive movable part 2 and the thermal expansion body in the extension part 2C contract. The piston rod 2A is also contracted. For this reason, the distance between the step 2D of the temperature-sensitive movable unit 2 and the step 24 of the second housing 20 in the vertical direction in FIG. Since the spring valve body 3 is also in an extended state, the gap between the spring wire members of the spring valve body 3 wound in a substantially truncated cone shape is also expanded in a predetermined manner.
Therefore, for example, when the heat medium is about to flow in from the opening 11 of the first housing 10, the heat medium passes through the gap of the spring wire rod of the spring valve body 3 as shown in FIG. The thermo valve 1 is opened so that the heat medium flows out from the opening 21 of the second housing 20.

FIG. 1 (B) shows a case where the heat medium has a relatively high temperature. In such a case, the temperature sensing part 2B of the temperature-sensitive movable part 2 and the thermal expansion body in the extension part 2C are thermally expanded. The piston rod 2A is extended. For this reason, the distance between the step 2D of the temperature-sensitive movable unit 2 and the step 24 of the second housing 20 in the vertical direction in FIG. 1B is relatively small, and is disposed therebetween. Since the spring valve body 3 is in a predetermined compressed state, the gap between the spring wire rods of the coil spring valve body 3 wound in a substantially truncated cone shape is reduced. For example, adjacent wire rods are in close contact with each other. It has become a state.

Therefore, for example, even when the heat medium is about to flow in from the opening 11 of the first housing 10, the heat medium passes through the gap of the spring wire of the coil spring valve body 3 as shown in FIG. Therefore, the thermo valve 1 is closed so that the outflow of the heat medium from the opening 21 of the second housing 20 is restricted.
Note that, for example, the degree of contact and the gap of the spring wire can be adjusted so that a predetermined amount of the heat medium flows through the gap of the spring wire of the coil spring valve body 3 in the valve closed state.

By the way, when shifting from the high temperature state (valve closed state) in FIG. 1 (B) to the low temperature state (valve open state) in FIG. 1 (A), the temperature sensing unit 2B of the temperature sensitive movable unit 2 and its Since the thermal expansion body enclosed in the extending part 2C contracts, but the force acting in the direction of contracting the piston rod 2A is not sufficient, the force for pushing up the temperature-sensitive movable part 2 from the outside upward in FIG. Is required. For this reason, for example, it is assumed that a so-called return spring that acts in the direction of separating the step portion 2D of the temperature-sensitive movable portion 2 and the second housing 20 is disposed, but in this embodiment, The coil spring valve body 3 is provided with a function as such a return spring. As a result, it is possible to further promote weight reduction, compactness, and cost reduction by reducing the number of parts.

In addition, if the coil spring valve body 3 also functions as a return spring in this way, a simple return spring can be omitted, so that the flow of the heat medium (coolant) is caused by the presence of the simple return spring. Without being obstructed, it is possible to suppress an increase in flow resistance (pressure loss) due to vortex flow or streamline turbulence.
In this embodiment, the flow direction of the heat medium is illustrated as going from the upper side to the lower side in FIG. 1, but the present invention is not limited to this, and the flow direction of the heat medium is directed from the lower side to the upper side in FIG. It is also possible to dispose the thermo valve 1 as described above.

Furthermore, for example, in the conventional thermovalve as shown in Patent Document 1 and Patent Document 2, a part for fixing and integrating the disc-like valve body to the movable part of the temperature-sensitive movable part is necessary. Assembly is required. In the thermovalve shown in Patent Document 1, a part called “retainer” is also necessary. On the other hand, if it is set as the structure using the coil spring valve body 3 like the thermo valve 1 which concerns on a present Example, these can be made unnecessary.

A thermo valve 100 according to Embodiment 2 of the present invention will be described with reference to FIG.
Similarly to the first embodiment, the thermo valve 100 according to the second embodiment also performs heat exchange by circulating a heat medium circulating to cool the internal combustion engine or the like, or heat heated by a heat source such as a boiler. It can be disposed in a heat medium circuit including a terminal device (such as a heater core for an automobile or a radiator core for heating a building) that exchanges heat by circulating the medium.
In the present embodiment, FIG. 3A shows a low temperature state (valve closed state), and FIG. 3B shows a high temperature state (valve open state).

A configuration of the thermo valve 100 will be described with reference to FIG. Here, a different part from Example 1 is demonstrated, the same code | symbol is attached | subjected about the same part, and the detailed description shall be abbreviate | omitted.
In the present embodiment, the structure and mounting arrangement of the first housing 10, the second housing 20, and the temperature-sensitive movable portion 2 can be the same as those in the first embodiment, and the coil spring wound in a substantially truncated cone shape. As shown in FIG. 3 (B), the valve body 103 is approximately between the step portion 15 of the first housing 10 and the end of the temperature sensing portion 2B of the temperature sensitive movable portion 2 on the piston rod 2A side. The small-diameter side of the truncated cone shape is disposed so as to face the end of the temperature sensing portion 2B on the piston rod 2A side, and the large-diameter side faces the step portion 15.

Further, a return spring 130 is disposed at a position where the coil spring valve element 3 is disposed in the first embodiment. The return spring 130 is enclosed in the temperature sensing unit 2B when the thermo valve 100 returns from the high temperature state shown in FIG. 3B to the low temperature state shown in FIG. When the thermal expansion body contracts), the temperature sensing unit 2B is pressed and urged upward in FIG. 3B (the direction in which the piston rod 2A contracts) to contract the piston rod 2A to the initial position (return to the initial position). Act).

Although the coil spring valve body 3 can also function as a return spring (biasing means) as in the first embodiment, in this embodiment, the spring wire material constituting the coil spring valve body 103 (spring steel) In consideration of the torsional stress limit, etc.), it is possible to achieve the performance required for the coil spring valve body 103 and to improve the durability, etc., as a configuration comprising a separate urging means.

Here, the thermo valve 100 according to the present embodiment can be assembled as follows, for example.
That is, for example, the return spring 130 is inserted and accommodated in the second housing 20, and the large diameter side of the return spring 130 is placed on the step portion 24 of the second housing 20.
Then, the lower part in FIG. 3 of the extending part 2C of the temperature-sensitive movable part 2 is inserted into the small diameter side of the return spring 130 and further to the guide part 23 of the second housing 20, and the coil spring valve body 103 is moved in this state. While placing on the temperature-sensitive movable part 2, the first housing 10 is brought to be covered, and the joining flange part 14 of the first housing 10 and the joining housing part 25 of the second housing 20 are provided. By joining, the thermo valve 1 can be assembled.
However, the assembly method and procedure are not limited to those described above, and can be changed as appropriate. The method for joining the joining flange portion 14 of the first housing 10 and the joining housing portion 25 of the second housing 20 can be the same as in the first embodiment.

Here, the operation of the thermo valve 100 according to the present embodiment will be described with reference to FIGS. 3 (A) and 3 (B).
FIG. 3A shows a case where the heat medium has a relatively low temperature. In such a case, the temperature sensing part 2B of the temperature-sensitive movable part 2 and the thermal expansion body in the extension part 2C contract. At the same time, since the temperature sensing unit 2B is pressed and urged upward in FIG. 3A by the return spring 130, the piston rod 2A is also contracted. Therefore, the coil spring valve body 103 disposed between the step portion 15 of the first housing 10 and the end of the temperature sensing portion 2B of the temperature sensitive movable portion 2 on the piston rod 2A side is compressed, The gap between the spring wires is narrowed to a predetermined value and is in a closed state.
Even in such a valve-closed state, the temperature sensing unit 2B and its extension part so that the temperature sensing part 2B of the temperature sensitive movable part 2 and its extension part 2C can sense the temperature of the heat medium. The passage of a predetermined amount of heat medium in the direction of 2C can be allowed.

FIG. 3B shows a case where the heat medium has a relatively high temperature. In such a case, the temperature sensing part 2B of the temperature-sensitive movable part 2 and the thermal expansion body in the extension part 2C are thermally expanded. Then, the return spring 130 is compressed downward in FIG. 3B, and the piston rod 2A extends. For this reason, the coil spring valve body 103 disposed between the step portion 15 of the first housing 10 and the end of the temperature sensing portion 2B of the temperature-sensitive movable portion 2 on the piston rod 2A side is extended, The gap between the spring wires expands to a predetermined value and opens.

Therefore, for example, when the heat medium is about to flow in from the opening 11 of the first housing 10, the heat medium passes through the gap of the spring wire rod of the coil spring valve body 103 as shown in FIG. Thus, the thermo valve 100 is opened so that the heat medium flows out from the opening 21 of the second housing 20.
By the way, in the present embodiment, the flow direction of the heat medium is illustrated as going from the upper side to the lower side in FIG. 3, but is not limited to this, and the flow direction of the heat medium is directed from the lower side to the upper side in FIG. It is also possible to arrange the thermo valve 100 as described above.

A thermo valve 200 according to Embodiment 3 of the present invention will be described with reference to FIG.
Although the thermo valve 200 according to the present embodiment is a three-way valve, as in the first embodiment, the heat medium circulating for cooling the internal combustion engine or the like is circulated to exchange heat, or is heated by a heat source such as a boiler. It can be arranged in a heat medium circuit including a terminal device (such as an automobile heater core or a building heating radiator core) that exchanges heat by circulating the produced heat medium.
In this embodiment, FIG. 4A shows a low temperature state (valve closed state), and FIG. 4B shows a high temperature state (valve open state).

A configuration of the thermo valve 200 will be described with reference to FIG. Here, a different part from Example 1, 2 is demonstrated, the same code | symbol is attached | subjected about the same part, and the detailed description shall be abbreviate | omitted.
In the present embodiment, the second housing 220 has the two first openings 221 and the second opening 222. However, the structure and mounting arrangement of the first housing 10 and the temperature-sensitive movable section 2 are described in the embodiment. 1. Similar to the second embodiment, and similarly to the second embodiment, the coil spring valve body 203 wound in a substantially truncated cone shape has a step of the first housing 10 as shown in FIG. Between the portion 15 and the end of the temperature sensing portion 2B of the temperature sensitive movable portion 2 on the piston rod 2A side, the small frustoconical shape faces the end of the temperature sensing portion 2B on the piston rod 2A side. The large diameter side is disposed so as to face the step portion 15.

Furthermore, in this embodiment, the coil spring valve body 230 is disposed at the position where the coil spring valve body 3 and the return spring 130 are disposed in the first and second embodiments. The coil spring valve body 230 functions as a return spring, and when returning from the state shown in FIG. 4 (B) to the state shown in FIG. 4 (A), the temperature sensing unit 2B is moved to the state shown in FIG. 4 (A). The piston rod 2A can be contracted by being pressed and urged in the middle upward direction (the direction in which the piston rod 2A contracts).

Here, based on FIG. 4, the operation | movement of the thermo valve 200 which concerns on a present Example is demonstrated.
FIG. 4A shows a case where the heat medium has a relatively low temperature. In such a case, the temperature sensing part 2B of the temperature-sensitive movable part 2 and the thermal expansion body in the extension part 2C contract. At the same time, the temperature sensing unit 2B is pressed and urged upward in FIG. 4A by the coil spring valve body 230 functioning as a return spring, so that the piston rod 2A is contracted. For this reason, the coil spring valve body 203 disposed between the step portion 15 of the first housing 10 and the end of the temperature sensing portion 2B of the temperature-sensitive movable portion 2 on the piston rod 2A side is compressed, The gap between the spring wires is narrowed to a predetermined value and is in a closed state. On the other hand, the coil spring valve body 230 is open.

Therefore, for example, when there is a heat medium that is going to flow in from the opening 11 of the first housing 10 and a heat medium that is going to flow in from the first opening 221 of the second housing 220 (when confluence), Inflow from the opening 11 of the first housing 10 is restricted, and the heat medium flowing from the first opening 221 of the second housing 220 mainly flows to the second opening 222 side of the second housing 220. 200 will operate.
Alternatively, for example, the heat medium flows in from the second opening 222 of the second housing 220 and divides the flow into the opening 11 side of the first housing 10 and the first opening 221 side of the second housing 220. The heat medium is restricted from flowing out to the opening 11 side of the first housing 10 and flows mainly to the first opening 221 side of the second housing 220. Thus, the thermo valve 200 will operate.

FIG. 4B shows a case where the heat medium has a relatively high temperature. In such a case, the temperature sensing part 2B of the temperature-sensitive movable part 2 and the thermal expansion body in the extension part 2C are thermally expanded. Then, the coil spring valve body 230 is compressed downward in FIG. 4B, and the piston rod 2A extends. For this reason, the coil spring valve body 203 is extended, and a gap between the spring wire rods is expanded to a predetermined value, thereby opening the valve. On the other hand, the coil spring valve body 230 is closed.

Therefore, for example, when there is a heat medium that is going to flow in from the opening 11 of the first housing 10 and a heat medium that is going to flow in from the first opening 221 of the second housing 220 (when confluence), The thermo-valve is such that the inflow from the first opening 221 of the second housing 220 is restricted and the heat medium flowing in from the opening 11 of the first housing 10 mainly flows to the second opening 222 side of the second housing 220. 200 will operate.
Alternatively, for example, the heat medium flows in from the second opening 222 of the second housing 220 and divides the flow into the opening 11 side of the first housing 10 and the first opening 221 side of the second housing 220. In the case of being arranged in this way (in the case of a diversion), the heat medium is restricted from flowing out to the first opening 221 side of the second housing 220 and flows mainly to the opening 11 side of the first housing 10. Thus, the thermo valve 200 will operate.

That is, the thermo valve 200 according to the present embodiment adjusts the distribution when the heat medium flowing in from different passages (flow paths) is merged on the downstream side of the thermo valve 200 according to the temperature state of the heat medium. The heat medium to be merged can be switched, and the distribution of the heat medium flowing into the thermo valve 200 from one passage (flow path) into two different passages (flow paths) is adjusted. Or the heat medium to be discharged can be switched.

Therefore, the thermovalve 200 according to the present embodiment is a control valve that can control the mixing ratio when the heat medium is merged according to the temperature state of the heat medium, or a flow that switches the flow path according to the temperature state of the heat medium. It can be used as a path switching valve or a control valve that can control the distribution ratio when the heat medium is branched according to the temperature state of the heat medium.
In addition, according to the thermo valve 200 according to the present embodiment, since a plurality of coil spring valve bodies can be driven and controlled by one temperature-sensitive movable portion 2, it is possible to respond to the temperature of the heat medium while maintaining low cost. Thus, the flow of the heat medium can be controlled.

A thermo valve 300 according to Embodiment 4 of the present invention will be described with reference to FIG.
Similarly to the first embodiment, the thermo valve 300 according to the fourth embodiment also performs heat exchange by circulating a heat medium circulating to cool the internal combustion engine or the like, or heat heated by a heat source such as a boiler. It can be disposed in a heat medium circuit including a terminal device (such as a heater core for an automobile or a radiator core for heating a building) that exchanges heat by circulating the medium.
In this embodiment, FIG. 5A shows a low temperature low differential pressure state (valve open state), and FIG. 5B shows a low temperature high differential pressure state (constant flow rate state: heat medium passing through a thermo valve. 5 (C) shows a state in which the opening degree of the coil spring valve body 303 is adjusted so that the flow rate of the heat medium is adjusted and controlled so that the flow rate becomes constant, and FIG. ).
The configuration of the thermo valve 300 will be described with reference to FIG. Here, a different part from another Example is demonstrated, the same code | symbol is attached | subjected about the same part, and the detailed description shall be abbreviate | omitted.

In the present embodiment, a step portion having a smaller diameter is further provided on the lower side in FIG. 5A of the step portion 2D provided in the vicinity of the joint portion between the temperature sensing portion 2B and the extension portion 2C of the temperature sensitive movable portion 2. 2E is provided.
Further, in addition to the step portion 24 of the second housing 20, a step portion 26 with a small diameter is further provided on the lower side in FIG.
Then, the coil spring valve body 303 wound in a substantially truncated cone shape includes a step portion 2E of the temperature-sensitive movable portion 2 and a step portion 26 of the second housing 20 as shown in FIG. In the meantime, the substantially truncated cone-shaped small-diameter side is arranged so as to face the step portion 2E and the large-diameter side faces the step portion 26.
Further, as shown in FIG. 5 (A), a return spring 330 wound in a substantially truncated cone shape disposed on the outer peripheral side of the coil spring valve body 303 includes a step portion 2D of the temperature-sensitive movable portion 2, Between the step portion 24 of the second housing 20, a substantially truncated cone-shaped small-diameter side is disposed so as to face the step portion 2 </ b> D, and a large-diameter side faces the step portion 24.

Here, based on FIG. 5 (A), FIG. 5 (B), and FIG. 5 (C), the operation | movement of the thermo valve 300 which concerns on a present Example is demonstrated.
FIG. 5A shows the case where the heat medium is relatively low temperature and the supply pressure of the heat medium is low (when the differential pressure of the heat medium before and after the coil spring valve body 303 is small). The temperature sensing part 2B of the temperature-sensitive movable part 2 and the thermal expansion body in the extension part 2C are contracted, and the temperature sensing part 2B is urged upward by a return spring 330 in FIG. Therefore, the piston rod 2A is also contracted. For this reason, the coil spring valve body 303 disposed between the step portion 2E and the step portion 26 is extended, and the gap of the spring wire is expanded to a predetermined value and is in the valve open state. .
Therefore, for example, when the heat medium is about to flow in from the opening 11 of the first housing 10, the heat medium passes through the gap of the spring wire rod of the coil spring valve body 303 as shown in FIG. Thus, the thermo valve 300 is opened so that the heat medium flows out from the opening 21 of the second housing 20.

FIG. 5B shows a case where the heat medium is relatively low in temperature and the supply pressure of the heat medium is high (for example, when the heat medium flow rate is instantaneously increased, the heat medium before and after the coil spring valve body 303). In this case, the spring wire receives the high differential pressure of the heat medium (the differential pressure due to the flow), as shown in FIG. The coil spring valve body 303 is compressed in the direction of the step portion 26, and the gap between the spring wire rods of the coil spring valve body 303 is narrowed to a predetermined value to be in a constant flow rate state. .

Therefore, for example, when the heat medium is about to flow in from the opening 11 of the first housing 10, as shown in FIG. 5B, the heat medium passes through the gap of the spring wire rod of the coil spring valve body 303. Is limited to a predetermined value, the flow of the heat medium from the opening 21 of the second housing 20 is restricted, and the thermo valve 300 is operated in the valve closing direction even in a low temperature state, and is in a constant flow rate control state. That is, the thermo valve 300 according to the present embodiment can function as a constant flow valve (high cut valve).

FIG. 5C shows a case where the heat medium has a relatively high temperature. In such a case, the temperature sensing part 2B of the temperature-sensitive movable part 2 and the thermal expansion body in the extension part 2C are thermally expanded. Then, the return spring 330 is compressed downward in FIG. 5C, and the piston rod 2A extends. For this reason, the gap | interval of the spring wire rod of the coil spring valve body 303 is narrowed by predetermined, and will be in a valve closing state.

By the way, in the present embodiment, when the instantaneous flow rate of the heat medium passing through the coil spring valve body 303 exceeds the threshold value, the difference between the front and rear is set so that the coil spring valve body 303 functions as a constant flow valve (high cut valve). Depending on the pressure, a gap between adjacent spring wires can be set so that the coil spring valve body 303 can be expanded and contracted independently of the thermal response of the temperature-sensitive movable part 2. As, it can be as follows.
That is, when the differential pressure across the coil spring valve body 303 exceeds a certain value, the passage hole area S due to the gap between the windings of the coil spring valve body 303 and the fluid with the coil spring valve body 3 as a boundary. The product of the square root ΔP ^1/2 of the differential pressure can be set to be substantially constant.

Here, in the

thermo valves

1, 100, 200, and 300 according to the above-described embodiments, the following effects can be obtained by using the coil

spring valve bodies

3, 103, 203, and 303 as the valve bodies. it can.

For example, the conventional thermovalves disclosed in Patent Document 1 and Patent Document 2 adopt a disk-like form in which the main valve body is disposed substantially facing the flow direction of the heat medium. In the configuration, the valve body is arranged so as to block the flow of the circulating heat medium, and the main valve body becomes an obstacle to the flow of the heat medium from the inlet side opening to the outlet side opening. Will be blocked. Therefore, even in the valve open state, the main part of the heat medium flow (excluding the flow through the minute temperature-sensitive leak hole that is opened in the valve body and supplies the heat medium to the temperature sensing part for temperature sensing is excluded. ) Must circulate around the outer shape of the disc-shaped main valve body, and there is a fact that the resistance (= pressure loss) of the circulation of the heat medium is large.

However, when the coil

spring valve bodies

3, 103, 203, and 303 according to the above-described embodiments are employed, the heat medium can flow smoothly and linearly between the spring wires. An effect of reducing resistance (= pressure loss) can be obtained.
Such an effect is most effective when the thermo valve as disclosed in Patent Document 1 and Patent Document 2 is linearly arranged from the inlet side opening to the outlet side opening through the main valve body. The same effect can be obtained even if the axis of the inlet opening and the axis of the outlet opening are bent and not in a linear relationship.

In addition, the coil

spring valve bodies

3, 103, 203, and 303 according to the above-described embodiments can be configured by winding a spring wire in a substantially cylindrical shape. In a state where the spring wire is compressed and crushed, the spring wire can be wound in a substantially truncated cone shape so that the spring wire is in close contact with the spiral shape. In this way, when the coil spring valve body is in the valve open state, the change in the flow direction of the heat medium before and after passing through the spring wire is small, and the flow of the heat medium can be made smooth and in the valve closed state. Compacting can be promoted.
By the way, the cross-sectional shape of the spring wire has an appropriate shape such as a circular shape, an elliptical shape, a triangular shape, a rectangular shape, a wedge shape, a trapezoidal shape, and other polygonal shapes according to requirements such as durability and heat medium passage resistance. can do.

The conventional thermovalves disclosed in Patent Document 1 and Patent Document 2 in which the main part of the flow of the heat medium must flow around the outer shape (outside of the outer shape) of the disk-shaped main valve body are as follows. The heat medium passage space must be secured outside the main valve body, but the size is increased. However, the thermovalve using the coil spring valve body according to each of the above embodiments enables a more compact design. To do.

Therefore, the

thermo valves

1, 100, 200, and 300 using the coil spring valve bodies according to the above embodiments can be designed to be compact and can be a low pressure loss thermo valve. For this reason, it is possible to broaden the possibility of widespread adoption, and the low pressure loss performance reduces the overall equipment weight and size by reducing the diameter of the piping path of the heat medium circuit and the capacity of the heat medium delivery pump. As a result, it can contribute to cost reduction.

Further, when the coil spring valve body is configured by winding the spring wire in a substantially truncated cone shape so that the spring wire closely adheres in a spiral shape in the compressed and crushed state as in each of the above-described embodiments, it is adjacent to the coil spring valve body. Since the gap of the spring wire exists from the small-diameter side to the large-diameter side, the heat medium also flows around the temperature-sensitive movable part 2 (temperature sensing part 2B, extension part 2C) arranged near the center of the coil spring valve body. Therefore, as compared with the case where the heat medium passes around the outer shape of the disc-shaped valve body as in the case of using a conventional disc-shaped valve body, the temperature sensing unit 2B. Since the flow rate of the heat medium around the temperature sensing unit 2B can be secured without the surrounding heat medium stagnating, the circulating heat medium can make good contact with the temperature sensing unit 2B, and thus temperature sensing. Part 2B is in circulation It is possible to capture the temperature of the medium quickly and accurately.
Such an effect is not limited to the case where the coil spring valve body is wound in a substantially truncated cone shape, but also in the case where it is formed by being wound in a substantially cylindrical shape. Compared with the one using a disc-shaped valve body, the heat medium around the temperature sensing unit 2B can be secured without the stagnation of the heat medium around the temperature sensing unit 2B, so that The medium can make good contact with the temperature sensing unit 2B, and the temperature sensing unit 2B can quickly and accurately capture the temperature of the circulating heat medium.

In particular, when the coil spring valve body is moved from the fully open state to the maximum throttle state, the spring wire wound in a substantially truncated cone shape constituting the coil spring valve body is compressed and crushed from the large-diameter side, and passes. Since the flow rate of the heating medium is controlled, the flow velocity on the small diameter side (= in the vicinity of the temperature sensing unit 2B) is secured even though the flow rate of the heating medium is reduced and reduced. Even in a state where the flow rate is reduced, the temperature sensing unit 2B can quickly and accurately capture the temperature of the circulating heat medium.
That is, according to the

thermo valves

1, 100, 200, and 300 using the coil spring valve bodies according to the above-described embodiments, not only when there is a sufficient heat medium flow rate, but also in a low flow rate region with high accuracy and responsiveness. A good thermo valve can be realized.

The

thermo valves

1, 100, 200, and 300 according to each of the above embodiments can control the flow rate of the heat medium according to the temperature and the differential pressure of the heat medium while being low cost and with high accuracy and responsiveness. Therefore, the following heat medium circulation system can be proposed.

Any one of the

thermo valves

1, 100, 200, 300 according to each of the above embodiments is provided downstream of a terminal device (such as a heater core for an automobile or a radiator core for heating a building) in one or more heat medium circuits. And providing a heat medium circulation system capable of controlling distribution of the heat medium according to fluctuations in heat demand and cooling demand of the terminal device by causing the temperature-sensitive movable unit 2 to sense the temperature of the heat medium at the location. Can do.
That is, by providing the thermo valve according to each of the above embodiments on the downstream side of the terminal device, the thermo valve can measure the degree of heat demand and cooling demand of the terminal device.

For example, the temperature of the coolant (heat medium) in the cooling system main circuit for engine cooling is controlled to a substantially constant stable temperature by the thermostat after the warm-up is completed. Therefore, the coolant temperature supplied to the coolant circuit branched therefrom can be predicted in advance. On the other hand, the coolant flows in, and the coolant temperature on the downstream side of the terminal device that exchanges heat with the coolant changes depending on the result of the heat exchange. If the terminal device needs a lot of heat, the temperature of the coolant on the downstream side of the terminal device becomes lower than the temperature of the supplied coolant. Conversely, if the terminal device needs a lot of cooling (release of heat to the coolant), the coolant temperature on the downstream side of the terminal device becomes higher than the supplied coolant temperature.
For this reason, if the temperature of the coolant is sensed on the downstream side of the terminal device, the degree of heat demand / cooling demand of the terminal device can be measured. By disposing such a thermo valve on the downstream side of the terminal device, it is possible to control the distribution of the heat medium according to fluctuations in the heat demand and cooling demand of the terminal device.

The same applies to the case where the thermo valve according to each of the above embodiments is applied to, for example, a heat medium circuit for heating a building. If the temperature of the heat medium is sensed downstream of a terminal device (such as a floor heating panel or a room heating radiator core) provided in each heat medium circuit, the degree of heat demand of the terminal device Therefore, by disposing the thermo valve according to each of the above embodiments on the downstream side of the terminal device, it is possible to control the distribution of the heat medium according to the fluctuation of the heat demand of the terminal device. Become.

As described above, by using the thermovalve according to each of the above embodiments, the flow rate of the heat medium is changed to a terminal device with less heat demand / cooling demand on the assumption that the heat demand / cooling demand of each terminal device fluctuates. The terminal device with high heat demand / cooling demand has as much flow as possible, and the flow high cut function (= constant flow valve function) is provided at any time without distributing more than necessary. A system (heat medium circuit) that distributes the heat medium in an optimal balance according to the state can be realized with a simple and inexpensive configuration without requiring a complicated control system.

In addition, this invention is not limited to the structure demonstrated in the Example mentioned above, The shape, structure, etc. of each part which comprises a thermovalve (thermally responsive valve) can be changed suitably and can be changed.

It is a figure which shows the structure of the thermovalve which concerns on Example 1 of this invention, (A) is a low-temperature state (valve-opening state), (B) is sectional drawing which shows a high-temperature state (valve-closing state), (C ) Is a view taken in the direction of arrow A in (A), and (D) is a view taken in the direction of arrow B in (A). FIG. 2 is an assembly diagram of the thermo valve of FIG. 1. It is a figure which shows the structure of the thermovalve which concerns on Example 2 of this invention, (A) is a low-temperature state (valve closing state), (B) is sectional drawing which shows a high temperature state (valve-opening state). It is a figure which shows the structure of the thermovalve which concerns on Example 3 of this invention, (A) is a low temperature state, (B) is sectional drawing which shows a high temperature state. It is a figure which shows the structure of the thermovalve which concerns on Example 4 of this invention, (A) is a low temperature low differential pressure state, (B) is a low temperature high differential pressure state, (C) is sectional drawing which shows a high temperature state. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,100,200,300 Thermo valve 2 Temperature sensing movable part 2A Piston rod 2B Temperature sensing part

2C Extension part

3, 103, 203, 230, 303 Coil spring valve body 10 1st housing 11 Opening part 12 Arm 13

Support part

20, 220 Second housing 21 Opening portion 22 Arm 23

Guide portion

130, 330 Return spring 221 First opening portion
222 Second opening

Claims

While being interposed in the heat medium circuit through which the heat medium flows,
A valve body that is operated in a direction along the flow path of the heat medium, and a temperature sensing device that opens and closes the valve body in a direction along the flow path of the heat medium by using a heat-responsive operation according to the temperature of the heat medium. A movable part,
A thermo valve that controls the flow of the heat medium according to the temperature of the heat medium,
A coil spring valve body that is opened and closed by increasing or decreasing the passage cross-sectional area of the flow path of the heat medium due to a change in the gap of the winding part due to the expansion and contraction of the valve body in conjunction with the thermal response operation of the temperature-sensitive movable part The thermo valve characterized by comprising.
A thermo valve that is interposed in a heat medium circuit through which the heat medium flows and controls the flow of the heat medium according to the temperature of the heat medium,
A temperature-sensitive movable part that opens and closes the valve body using a heat-responsive operation according to the temperature of the heat medium;
A first housing having a flow path through which the heat medium flows, and a support portion protruding inside the flow path to support and fix a part of the temperature-sensitive movable portion;
A second housing having a flow path through which the heat medium flows, and having a guide portion that protrudes inside the flow path and supports and guides the advancing and retreating portion of the temperature-sensitive movable portion;
The flow path of the heat medium is arranged in a valve chamber formed at an intermediate position between the support portion and the guide portion, and the heat medium flow path is changed by a gap change of the winding portion by being expanded and contracted in conjunction with the heat-responsive operation of the temperature-sensitive movable portion. A coil spring valve body that is opened and closed by increasing or decreasing the cross-sectional area of
A thermo-valve characterized by comprising.
The first housing is formed by integral molding of a flow path through which the heat medium flows, an arm extending from the inner wall of the flow path, and a support portion that is supported by the arm and supports and fixes a part of the temperature-sensitive movable portion. And
The second housing is integrally formed with a flow path through which the heat medium flows, an arm extending from the inner wall of the flow path, and a support guide portion that is supported by the arm and supports and guides the advancing / retreating member of the temperature-sensitive movable portion. The thermo valve according to claim 2, wherein the thermo valve is formed by:
A thermo valve according to any one of claims 1 to 3,
A thermo-valve, wherein the coil spring valve body is configured by winding a spring wire in a substantially truncated cone shape so that the spring wire closely adheres in a spiral shape in a state where the coil spring valve body is compressed and crushed to a predetermined degree.
A thermo valve according to any one of claims 1 to 4,
A thermo-valve comprising a return spring that urges the advancing / retreating part of the temperature-sensitive movable part to return to the original position.
A thermo valve according to any one of claims 1 to 5,
In the first housing or the second housing forming the valve chamber, a branch or junction of the heat medium circuit is formed,
In the valve chamber, another coil spring valve body that opens and closes in conjunction with the thermally responsive operation of the temperature-sensitive movable part is provided,
A thermo-valve characterized in that a plurality of coil spring valve bodies are driven to open and close by the temperature-sensitive movable part, and a distribution ratio or a mixing ratio of the heat medium can be controlled.
A thermo valve according to any one of claims 1 to 6,
When the instantaneous flow rate of the heat medium that passes through the coil spring valve body exceeds a threshold value, the thermal response of the temperature-sensitive movable part according to the front-rear differential pressure so that the coil spring valve body functions as a constant flow valve. A thermo-valve characterized in that it can extend and contract independently.
A heat medium circuit comprising the thermo valve according to any one of claims 1 to 7.
9. The heat medium circuit according to claim 8, wherein the thermo valve is disposed downstream of a terminal device that exchanges heat by circulating the heat medium.
10. A heat medium circuit according to claim 8, wherein the heat medium circuit is a heat medium circuit in a cooling system of an internal combustion engine or a heating system of a building.