CN101387353B - Flow distributor and differential heat meter using the flow distributor - Google Patents
Flow distributor and differential heat meter using the flow distributor Download PDFInfo
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- CN101387353B CN101387353B CN2008102254492A CN200810225449A CN101387353B CN 101387353 B CN101387353 B CN 101387353B CN 2008102254492 A CN2008102254492 A CN 2008102254492A CN 200810225449 A CN200810225449 A CN 200810225449A CN 101387353 B CN101387353 B CN 101387353B
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- outer vent
- inner outlet
- flow distributor
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Abstract
The invention relates to a flow distributor, which comprises a valve body, a sliding valve core and an adjusting component, wherein one end face of the valve body is provided with a medium inlet, the side wall of the valve body is provided with two external outlets, the side wall of the sliding valve core is provided with two internal outlets, the adjusting component is a temperature-length memory spring positioned in an inner cavity of the valve body, the sliding valve core can be attached to the inner cavity of the valve body and moved under the control of the memory spring, the two external outlets and the two internal outlets are parallelograms which have the same section shape and the same sectional area, the first external outlet can be completely coincided with the first internal outlet, and the second external outlet can be completely coincided with the second internal outlet. The flow distributor is not supplied by power, can be used singly, and can form a passive element together with other components.
Description
Technical field
The present invention relates to a kind of flow distributor, it can use separately, also can be used for relying on the power of medium (for example water) to realize the differential calorimeter that heat is measured.
Background technique
In today of conservation-minded society, the status that national policy is encouraged has been brought up in the metering of the civil heating of energy saving.Existing calorimeter generally all needs power source driving, and it has significant deficiency, promptly must periodic replacement or check the power supply of calorimeter, in case and power supply exhausts or break down, then heating metering will be ended.Periodic replacement or check that the power supply of calorimeter will expend heating company great amount of manpower and material resources and financial resources, when power supply artificial or natural fault and electric energy occur and exhausts, heating company will suffer a loss.
Summary of the invention
The object of the present invention is to provide a kind of flow distributor, it comprises valve body, sliding valve core and adjusting parts, wherein valve body has hollow, uniform inner chamber, has the inlet that allows medium flow on the end face of valve body, has first outer vent, second outer vent on the sidewall of valve body; Sliding valve core has the hollow structure that matches with the cavity shape of valve body, and the length of sliding valve core is less than the interior cavity length of valve body.Have first inner outlet, second inner outlet on the sidewall of sliding valve core; The adjusting parts are memory spring, are arranged in the inner chamber of valve body, and described memory spring has temperature-length memory function; Memory spring is connected with sliding valve core, an end butt of the other end of memory spring and valve body or be connected, and sliding valve core can be close under the control of memory spring on the body cavity and move; First outer vent, second outer vent are the parallelogram that sectional shape is identical and sectional area equates with first inner outlet, second inner outlet, and first outer vent can overlap fully with first inner outlet, and second outer vent can overlap fully with second inner outlet.
On the other hand, provide a kind of passive differential calorimeter that uses this flow distributor.
Description of drawings
Fig. 1 is the structural representation of a preferred embodiment of differential calorimeter of the present invention;
Fig. 2 is illustrated in a preferred embodiment of the CalCt device that uses in the differential calorimeter of the present invention;
Fig. 3 a represents the embodiment's of the flow distributor in the embodiment illustrated in fig. 1 schematic representation of longitudinal section;
Fig. 3 b represents the schematic representation figure of the cross section that the cardinal principle of the flow distributor in the embodiment of the invention shown in Figure 1 is rectangular;
Fig. 3 c represents the schematic representation figure of the cross section that the cardinal principle of the flow distributor in the embodiment of the invention shown in Figure 1 is rounded;
Fig. 3 d represents from the schematic representation of the longitudinal section of the flow distributor of the present invention of Fig. 3 a top observation;
Fig. 3 e represents the schematic representation of first embodiment of position relation between the inner outlet of flow distributor of the present invention and the outer vent;
Fig. 3 f represents the schematic representation of second embodiment of position relation between the inner outlet of flow distributor of the present invention and the outer vent.
Embodiment
Below in conjunction with Fig. 1 differential calorimeter of the present invention being elaborated, is calorimeter in the double dot dash line among Fig. 1.
Be noted that at first the medium in the differential calorimeter of the present invention can be any suitable fluid or semifluid, but for convenience of explanation, below with water as an example, but employed medium is not limited to water among the present invention.
As shown in fig. 1, differential calorimeter of the present invention (below abbreviate calorimeter as) includes water flow distributor 2, CalCt device 4, circling water flow rate distributor 9 and the connecting tube between them, discharge distributor 2 links to each other with calorimeter inlet 1, the outlet of discharge distributor 2 links to each other with first bypass duct 6 with pipeline 3 respectively, pipeline 3 links to each other with first inlet 37 of CalCt device 4, first outlet 38 of CalCt device 4 links to each other with first bypass duct 6 at first tee union, 7 places through pipeline 5, and first tee union 7 links to each other with the inlet of radiation system 8.Circling water flow rate distributor 9 links to each other with the outlet of radiation system 8, the outlet of circling water flow rate distributor 9 links to each other with second bypass duct 11 with pipeline 10 respectively, pipeline 10 links to each other with second inlet 40 of CalCt device 4, second outlet 39 of CalCt device 4 links to each other with second bypass duct 11 at second tee union, 13 places through pipeline 12, and second tee union 13 exports 14 with calorimeter and links to each other.
The following describes the path of current.Hot water enters the mouth from calorimeter and 1 enters, ingoing stream amount distributor 2 divides two-way output then, and one the tunnel enters CalCt device 4 through pipeline 3 by first inlet 37, arrive first tee union 7 by first outlet 38 through pipeline 5 again, another road first bypass duct 6 arrives first tee union 7.Subsequently, hot water enters the radiation system 8 of heating unit through the inlet of radiation system 8 from first tee union 7, outlet from radiation system 8 enters circling water flow rate distributor 9 again, divide the two-way input then, one the tunnel 40 enters CalCt device 4 through pipeline 10 by second inlet, arrive second tee union 13 by second outlet 39 through pipeline 12 again, another road second bypass duct 11 arrives second tee union 13.Subsequently, hot water is through calorimeter outlet 14 outputs.
In this embodiment, discharge distributor 2 has identical structure with circling water flow rate distributor 9, flow distributor 2,9 can distribute the flow that flows into CalCt device 4 and bypass duct automatically according to the temperature of water, and the temperature of water becomes identical linear relationship with the flow that flows into CalCt device 4 and bypass duct.But, it will be understood by those skilled in the art that flow distributor 2,9 and linear relationship between the flow that flows into CalCt device 4 and bypass duct can be different, in such cases, the structure that only need adjust CalCt device 4 gets final product.
It will be understood by those skilled in the art that and adopt the mode of for example computer program control can reach above-mentioned linear relationship.In addition, also can use the flow distributor structure differential calorimeter shown in Fig. 3 a-3f, thereby constitute passive differential calorimeter.The structure of the flow distributor shown in Fig. 3 a-3f and working principle will be illustrated in the back.
When the water of uniform temperature when calorimeter inlet 1 enters discharge distributor 2, discharge distributor 2 can distribute the flow that flows into the CalCt device 4 and first bypass duct 6 automatically according to the temperature of water, enter flow quilt (with certain corner form) record of the water of CalCt device 4, the entry heat Q of radiation system 8 represented in this record
Go into
The water that flows out from the outlet of radiation system 8 flows into circling water flow rate distributor 9, and circling water flow rate distributor 9 distributes the flow that flows into the CalCt device 4 and second bypass duct 11 automatically according to return water temperature.Enter flow quilt (with certain corner form) record of the water of CalCt device 4, the backwater heat Q of radiation system 8 represented in this record
Go out
The representative entry heat Q that is recorded
Go intoWith backwater heat Q
Go outCorner, after the calculating of CalCt device 4, obtain the heat Q of heat sink radiates
Loose, and output in the counter with certain form.In CalCt device 4, the pass between each heat is:
Q
Loose=Q
Go into-Q
Go out
In calorimeter, as long as can make the temperature of the water that flows into water flow distributor 2,9 linear with the flow that flows into CalCt device 4 and bypass duct, CalCt device 4 just can correctly measure the heat of heat sink radiates.
For example, when and water temperature inlet constant when the water temperature of the water outlet of calorimeter improves, flow to the corresponding increase of flow of CalCt device 4, the impeller faster rotational speed that representative enters heat in the counter, the numerical value Q of its expression entry heat
Go intoIncrease, and the rotating speed of the impeller of the heat that representative is flowed out is constant, so, the heat Q of expression heat sink radiates
LooseNumerical value also increasing, vice versa.
Certainly, also can set constant when the water temperature of the water outlet of calorimeter and water temperature inlet when improving, flow to the corresponding minimizing of flow of CalCt device 4, so the impeller rotating speed that representative enters heat in the counter reduces, it represents the numerical value Q of entry heat
Go intoIncrease, and the rotating speed of the impeller of the heat that representative is flowed out is constant, so, the heat Q of heat sink radiates also can be represented
LooseNumerical value increasing, vice versa.
The structure and the working principle of CalCt device 4 are described below with reference to Fig. 2.
As shown in Figure 2, hot water enters first inlet 37 from pipeline 3, and the impeller 25 of flowing through flows out from first outlet 38, on the output shaft 17 of impeller 25 bevel gear 19 is installed, bevel gear 19 and bevel planet gear 26 and 27 engagements.The current that enter second inlet 39 from pipeline 10 flow out from second outlet 40 through impeller 15, on the output shaft 16 of impeller 15 bevel gear 18 are installed, and bevel gear 18 also meshes with bevel planet gear 26 and 27.Bevel planet gear 26 and 27 is rotatably installed in respectively on planetary wheel carrier 20 and 21, planetary wheel carrier 20 and 21 is fixedly connected with the bevel gear wheel 22 that is rotatably installed on the output shaft 17 again, bevel gear wheel 22 meshes with bevel pinion 23 again, bevel pinion 23 is installed on the axle 24, axle 24 will rotatablely move and be delivered in the counter 28, and shown in the counter 28 is exactly the heat that radiation system 8 consumes.
When water flow through from CalCt device 4 and drive impeller 25 and 15 rotations, impeller 25 and 15 drove bevel gear 19 and 18 respectively along opposite direction rotation (as selection, bevel gear 19 is rotated with 18 along identical direction).When the temperature of the water that flows through discharge distributor 2 and circling water flow rate distributor 9 not simultaneously, discharge distributor 2 is assigned to the different water yields first inlet, 37 and second inlet 39 according to water temperature respectively automatically with circling water flow rate distributor 9, thereby the impeller 25 of flowing through is different with 15 the water yield, thereby make bevel gear 19 different with 18 rotating speed.Because bevel gear 19 opposite (or identical) and rotating speed difference with 18 sense of rotation, thereby make bevel planet gear 26 and 27 except around axis rotation own, also the axis around bevel gear 19 and 18 rotates, thereby drive bevel gear wheel 22 rotations by planetary wheel carrier 20 and 21, drive axle 24 rotations by bevel pinion 23 then, in counter 28, demonstrate the heat that radiation system 8 consumes.
Construct the structure and the working principle of the flow distributor of passive differential calorimeter below with reference to Fig. 3 a-3f explanation.
Described flow distributor comprises valve body 201, sliding valve core 202 and regulates parts.
Among Fig. 3 a, valve body 201 has hollow, uniform inner chamber, and intracavity section can be the rectangle shown in Fig. 3 b, also can be the circle shown in Fig. 3 b, also can be other shape.Have the water inlet 208 that allows water flow on one end face of valve body 201, the other end relative with water inlet 208 on the valve body 201 opens wide, and by end cap 207 with its sealing; Also the end cap that has water inlet can be arranged on the entry oral-lateral, and make valve body and end cap constitute one.Have two out outlets 211,212 on the sidewall of valve body 201.
Sliding valve core 202 has the hollow structure that matches with the cavity shape of valve body 201, and the length of sliding valve core 202 is less than the interior cavity length of valve body 201.Have two interior water outlets 213,214 on the sidewall of sliding valve core 202.
Regulate parts and be made of with Cock screw 205 memory spring 203, the holddown spring 206 that resets, mobile back-up ring 204, memory spring 203, reset holddown spring 206 and mobile back-up ring 204 are arranged in the inner chamber of valve body 201.Described memory spring 203 has temperature-length memory function, is made by memory alloy material, or is made by the known materials with temperature-length memory function of other shape, as the cylinder of being made by the paraffin that is mixed with copper powders may.
Sliding valve core 202 is clamped in and resets between holddown spring 206 and the memory spring 203.Reset holddown spring 206 the other end butt or be connected an end of valve body 201.One end butt of one end of memory spring 203 and sliding valve core 202 or be connected, the other end of memory spring 203 is with mobile back-up ring 204 butts or be connected, mobile back-up ring 204 is connected with Cock screw 205, another end of valve body 201 is passed in the adjustable side of Cock screw 205, thereby stretches out from the inner chamber of valve body 201.Sliding valve core 202 can be close under the control of memory spring 203 on the body cavity and move.
First outer vent 212, second outer vent 211 are the parallelogram that sectional shape is identical and sectional area equates with first inner outlet 214, second inner outlet 213, first outer vent 212 can overlap fully with first inner outlet 214, and second outer vent 211 can overlap fully with second inner outlet 213.First outer vent 212, second outer vent 211 and first inner outlet 214, second inner outlet 213 can dispose as the mode of Fig. 3 e, 3f.Shown in Fig. 3 e, when first outer vent 212 overlapped fully with first inner outlet 214, the opening lower edge of second inner outlet 213 was relative with the upper edge of second outer vent 211, and making does not have flow channel between second inner outlet 213 and second outer vent 211.Shown in Fig. 3 f, when first outer vent 212 overlapped fully with first inner outlet 214, the opening upper edge of second inner outlet 213 was relative with the lower edge of second outer vent 211, and making does not have flow channel between second inner outlet 213 and second outer vent 211.
The working principle of flow distributor is described now.
When having uniform temperature certain flow f
Go intoWater enter valve inner from the water inlet 208 of valve after, memory spring 203 makes according to the temperature of water and oneself keeps corresponding length, makes sliding valve core 202 keep certain relative position with respect to valve body 201.
The sectional area size of supposing first outer vent 212, second outer vent 211, first inner outlet 214 and second inner outlet 213 all is opening area S
Go outSecond outer vent 211 is S with respect to the opening area of second inner outlet 213
Go out 2, first outer vent 212 is S with respect to the opening area of first inner outlet 214
Go out 1, then temperature one timing of water, the length of memory spring 3 is certain, thereby S
Go out 1With S
Go out 2Size also be certain.Because first outer vent 212, second outer vent 211 are the corresponding parallelogram of shape with first inner outlet 214, second inner outlet 213, so opening area S
Go outWith discharge area S
Go out 1, S
Go out 2Between the pass be:
S
Go out=S
Go out 1+ S
Go out 2
Suppose that the flow that exports 210 water that flow out from second outlet 209 and first is respectively f
Go out 2And f
Go out 1, f then
Go out 1And f
Go out 2With the water flow f that flows into from water inlet 208
Go intoThe pass be:
f
Go into=f
Go out 1+ f
Go out 2
Obvious f
Go out 1, f
Go out 2Size depend on S respectively
Go out 1, S
Go out 2Size, and f
Go out 1With S
Go out 1Proportional, f
Go out 2With S
Go out 2Proportional.
In the situation of Fig. 3 a, Fig. 3 e, when the temperature of water changes, during such as water temperature rising Δ t (situation when water temperature reduces is opposite with following variation), that is: t → t+ Δ t, the length of memory spring 3 has increased Δ l, that is: l → l+ Δ l, so the spool among Fig. 3 has moved down the distance of Δ l, and then the opening at second outer vent 211 and second inner outlet, 213 places has increased Δ S
Go out 2Opening area, that is: S
Go out 2→ S
Go out 2+ Δ S
Go out 2So, by the flow f of this opening
Go out 2→ f
Go out 2+ Δ f
Go out 2The opening at first outer vent 212 and first inner outlet, 214 places has reduced Δ S
Go out 2Opening area, that is: S
Go out 1→ S
Go out 1-Δ S
Go out 1So, by the flow f of this opening
Go out 1→ f
Go out 1-Δ f
Go out 1
After the change in location of spool, owing to first outer vent 212, second outer vent 211 are the corresponding parallelogram of shape with first inner outlet 214, second inner outlet 213, so Δ S
Go out 1=Δ S
Go out 2, therefore, Δ f
Go out 1=Δ f
Go out 2
Before water temperature changes:
S
Go out=S
Go out 1+ S
Go out 2f
Go into=f
Go out 1+ f
Go out 2
Water temperature changes the back:
(S
Go out 1-Δ S
Go out 1)+(S
Go out 2+ Δ S
Go out 2)=(S
Go out 1+ S
Go out 2)+(Δ S
Go out 2-Δ S
Go out 1)=S
Go out 1+ S
Go out 2=S
Go out
(f
Go out 1-Δ f
Go out 1)+(f
Go out 2+ Δ S
Go out 2)=(f
Go out 1+ f
Go out 2)+(Δ f
Go out 2-Δ f
Go out 1)=f
Go out 1+ f
Go out 2=f
Go into
The following formula explanation: when water temperature increases, the opening area S at second outer vent 211 and second inner outlet, 213 places
Go out 2Increased, by the flow f of this outlet
Go out 2Also increased; The opening area S at first outer vent 212 and first inner outlet, 214 places
Go out 1Reduced, by the flow f of this outlet
Go out 1Also reduced; The variable quantity of the sectional area of two place's openings always equates that is: the increasing amount of place's opening area equals the reduction of another place's opening area; The variable quantity of the flow of two place's openings always equates that is: the increasing amount of place's opening flow equals the reduction of another place's opening flow; The gross area that water temperature changes front and back and change procedure middle outlet is constant, all equals S
Go outThe total discharge that water temperature changes front and back and change procedure middle outlet is constant, all equals f
Go into
In the situation of Fig. 3 f, when the temperature of water changes, during such as water temperature rising Δ t (situation when water temperature reduces is opposite with following variation), that is: t → t+ Δ t, the length of memory spring 3 has reduced Δ l, that is: l → l-Δ l, and the situation of change of flow f and area S is opposite with the situation of Fig. 3 e, can guarantee that still the variable quantity of the sectional area of two place's openings always equates, that is: the increasing amount of place's opening area equals the reduction of another place's opening area; The variable quantity of the flow of two place's openings always equates that is: the increasing amount of place's opening flow equals the reduction of another place's opening flow; The gross area that water temperature changes front and back and change procedure middle outlet is constant, all equals S
Go outThe total discharge that water temperature changes front and back and change procedure middle outlet is constant, all equals f
Go into
Be appreciated that described flow distributor can construct passive differential calorimeter, also can be applied to carry out according to temperature the occasion of assignment of traffic separately.The medium that flows in this flow distributor is not limited to water, can be other fluid or semifluid.
Describe the present invention by preferred embodiment above, but the present invention is not limited to the preferred embodiment, but can have other to change, for example the adjusting parts in the flow distributor can not comprise the holddown spring 206 that resets, and perhaps only comprise memory spring 203.Those of ordinary skills should be understood that under the situation that does not deviate from spirit and scope of the invention, can carry out various changes to the present invention, and the present invention is defined by the appended claims.
Claims (10)
1. a flow distributor comprises valve body (201), sliding valve core (202) and regulates parts, it is characterized in that:
Valve body (201) has hollow, uniform inner chamber, has the inlet (208) that allows medium flow on the end face of valve body (201), has first outer vent (212), second outer vent (211) on the sidewall of valve body (201);
Sliding valve core (202) has the hollow structure that matches with the cavity shape of valve body (201), the length of sliding valve core (202) has first inner outlet (214), second inner outlet (213) less than the interior cavity length of valve body (201) on the sidewall of sliding valve core (202);
The adjusting parts are memory spring (203), are arranged in the inner chamber of valve body (201), and described memory spring (203) has temperature-length memory function;
One end of memory spring (203) is connected with sliding valve core (202), an end butt of the other end of memory spring (203) and valve body (201) or be connected, and sliding valve core (202) can be close under the control of memory spring (203) on the body cavity and move;
First outer vent (212), second outer vent (211) are the parallelogram that sectional shape is identical and sectional area equates with first inner outlet (214), second inner outlet (213), first outer vent (212) can overlap fully with first inner outlet (214), and second outer vent (211) can overlap fully with second inner outlet (213).
2. flow distributor as claimed in claim 1 is characterized in that: the intracavity section of valve body is rectangle or circle.
3. flow distributor as claimed in claim 1 is characterized in that: it is unlimited that valve body (201) is gone up the other end relative with inlet (208), by end cap (207) with its sealing.
4. flow distributor as claimed in claim 1 is characterized in that: the end cap that will have water inlet is arranged on the entry oral-lateral, and makes valve body and end cap constitute one.
5. flow distributor as claimed in claim 1, it is characterized in that: first outer vent (212), second outer vent (211) dispose as follows with first inner outlet (214), second inner outlet (213), when first outer vent (212) and first inner outlet (214) when overlapping fully, the opening lower edge of second inner outlet (213) is relative with the upper edge of second outer vent (211), and making does not have flow channel between second inner outlet (213) and second outer vent (211).
6. flow distributor as claimed in claim 1, it is characterized in that: first outer vent (212), second outer vent (211) dispose as follows with first inner outlet (214), second inner outlet (213), when first outer vent (212) and first inner outlet (214) when overlapping fully, the opening upper edge of second inner outlet (213) is relative with the lower edge of second outer vent (211), and making does not have flow channel between second inner outlet (213) and second outer vent (211).
7. flow distributor as claimed in claim 1 is characterized in that: the cylinder that described memory spring 203 is made by the paraffin that is mixed with copper powders may replaces.
8. flow distributor as claimed in claim 1, it is characterized in that: regulate parts and also comprise the holddown spring that resets (206), be configured to sliding valve core (202) is clamped between the end and memory spring (203) of the holddown spring that resets (206) the other end butt of the holddown spring that resets (206) or be connected an end of valve body (201).
9. a flow distributor comprises valve body (201), sliding valve core (202) and regulates parts, it is characterized in that:
Valve body (201) has hollow, uniform inner chamber, has the inlet (208) that allows medium flow on the end face of valve body (201), has first outer vent (212), second outer vent (211) on the sidewall of valve body (201);
Sliding valve core (202) has the hollow structure that matches with the cavity shape of valve body (201), the length of sliding valve core (202) has first inner outlet (214), second inner outlet (213) less than the interior cavity length of valve body (201) on the sidewall of sliding valve core (202);
Regulate parts and comprise memory spring (203), mobile back-up ring (204) and Cock screw (205), memory spring (203) is arranged in the inner chamber of valve body (201), and described memory spring (203) has temperature-length memory function;
One end of memory spring (203) is connected with sliding valve core (202), the other end of memory spring (203) is with mobile back-up ring (204) butt or be connected, mobile back-up ring (204) is connected with Cock screw (205), the end of valve body (201) is passed in the adjustable side of Cock screw (205), thereby stretch out from the inner chamber of valve body (201), sliding valve core (202) can be close under the control of memory spring (203) on the body cavity and move;
First outer vent (212), second outer vent (211) are the parallelogram that sectional shape is identical and sectional area equates with first inner outlet (214), second inner outlet (213), first outer vent (212) can overlap fully with first inner outlet (214), and second outer vent (211) can overlap fully with second inner outlet (213).
10. flow distributor as claimed in claim 9, it is characterized in that: regulate parts and also comprise the holddown spring that resets (206), be configured to sliding valve core (202) is clamped between the end and memory spring (203) of the holddown spring that resets (206) the other end butt of the holddown spring that resets (206) or be connected an end of valve body (201).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102254492A CN101387353B (en) | 2008-10-31 | 2008-10-31 | Flow distributor and differential heat meter using the flow distributor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102254492A CN101387353B (en) | 2008-10-31 | 2008-10-31 | Flow distributor and differential heat meter using the flow distributor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101387353A CN101387353A (en) | 2009-03-18 |
| CN101387353B true CN101387353B (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008102254492A Expired - Fee Related CN101387353B (en) | 2008-10-31 | 2008-10-31 | Flow distributor and differential heat meter using the flow distributor |
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| Country | Link |
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| CN (1) | CN101387353B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7905656B2 (en) | 2007-09-20 | 2011-03-15 | Beijing Union University | Differential passive calorimeter |
| CN103267595B (en) * | 2013-05-20 | 2015-01-07 | 杨威 | Heat quantity metering system and metering method thereof |
| CN105090561B (en) * | 2015-08-10 | 2018-01-23 | 卢小平 | Passive automatic switching valve and automatic cleaning equipment |
| CN112833216B (en) * | 2021-01-06 | 2022-03-08 | 宁波方太厨具有限公司 | Three-way valve and water heater |
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2008
- 2008-10-31 CN CN2008102254492A patent/CN101387353B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101387353A (en) | 2009-03-18 |
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Granted publication date: 20100609 Termination date: 20111031 |