CN108594870B

CN108594870B - Water-rice ratio control device

Info

Publication number: CN108594870B
Application number: CN201810365126.7A
Authority: CN
Inventors: 戴志卿
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-04-18
Filing date: 2018-04-18
Publication date: 2021-04-06
Anticipated expiration: 2038-04-18
Also published as: CN108594870A

Abstract

The invention discloses a water-rice ratio control device, which comprises: the gear transmission mechanism comprises a fixed shell, a fixed rod, a guide sleeve, a driving gear, a driving rack, a first driven gear, a second driven gear and a second driven rack, wherein one end of the fixed rod is fixed on the fixed shell. The guide sleeve is sleeved outside the fixed rod and can move along the axis direction of the fixed rod. The driving gear is pivoted to the fixed shell. The driving rack is fixed on the guide sleeve and meshed with the driving gear, and the moving direction of the driving rack is parallel to the axis direction of the fixed rod. The first driven gear is pivoted to the fixed shell and meshed with the driving gear, and the diameters of reference circles of the first driven gear and the driving gear are the same. The second driven gear is coaxially and fixedly connected with the first driven gear. The second driven rack is meshed with the second driven gear, and the ratio of the moving speed of the second driven rack to the moving speed of the driving rack is a fixed value M which is larger than 1. The invention can realize the function of accurately controlling the water-rice ratio.

Description

Water-rice ratio control device

Technical Field

The invention relates to a water-rice ratio control device.

Background

With the continuous improvement of living standard, the requirement of people on diet is also continuously improved. The rice is the staple food most frequently eaten by Chinese people, and the cooking quality of the rice directly determines the satisfaction degree of eaters on diet.

An important factor affecting the cooking quality of rice is the ratio control of rice and water. In daily life, the water adding mode of cooking rice is to pour the washed rice into a container for cooking and then add water into the container according to life experience. For example: one empirical way of adding water is to touch the surface of the layer of rice in the container with the tip of the index finger, as long as the water exceeds the height of a meter to reach the first joint of the index finger. The empirical mode is solid and practical when water is added to a certain fixed amount of rice, but obviously is difficult to apply when water is added to other different amounts of rice. Taking a certain variety of rice which is eaten by people in daily life as an example, the volume ratio of water to rice is 1:1.2, the hardness and the mouthfeel of the cooked rice are optimal. But with everyday kitchen utensils it is difficult to control the water to rice volume ratio accurately and quickly to the optimum ratio.

Disclosure of Invention

The invention aims to overcome the defect that the proportion of rice and water is difficult to accurately control when rice is cooked in the prior art, and provides a water-rice proportion control device capable of accurately controlling the proportion of rice and water.

The invention solves the technical problems through the following technical scheme:

a water-rice ratio control device is characterized by comprising

A stationary case;

a fixing rod, one end of which is fixed to the fixing housing;

the guide sleeve is sleeved outside the fixed rod and can move along the axial direction of the fixed rod;

a drive gear pivotally connected to the stationary housing;

the driving rack is fixed on the guide sleeve and meshed with the driving gear, and the moving direction of the driving rack is parallel to the axial direction of the fixed rod;

the first driven gear is pivoted to the fixed shell and meshed with the driving gear, and the first driven gear and the driving gear have the same reference circle diameter;

the second driven gear is coaxially and fixedly connected with the first driven gear;

the second driven rack is meshed with the second driven gear, the moving direction of the second driven rack is the same as that of the driving rack, and the ratio of the moving speed of the second driven rack to that of the driving rack is a fixed value M greater than 1.

Preferably, a conical member is arranged at one end of the guide sleeve, which is far away from the fixing shell, an abutting surface is arranged on the conical member, the abutting surface is perpendicular to the axial direction of the fixing rod, and the abutting surface faces the direction far away from the fixing shell.

In this scheme, when the dead lever inserted the rice, the rice produced ascending thrust to the uide bushing, promoted the relative dead lever rebound of uide bushing. At this moment, the conical part can prevent that the uide bushing from entering into in the rice, influencing the rise of uide bushing to guarantee the demand of the water of accurate measurement and calculation.

Preferably, one end of the fixing rod far away from the fixing shell is a tip.

In this scheme, the pointed end can be convenient for the dead lever to insert the bottom on big rice layer.

Preferably, the tip is sleeved with a metal sleeve.

In this scheme, the metal covering plays the guard action to the pointed end, prevents to use for a long time and causes wearing and tearing to the pointed end.

Preferably, the water-rice ratio control device further comprises:

a water supply assembly for outputting drinking water;

the controller is electrically connected with the water supply assembly and is used for controlling the water supply assembly to be opened or closed;

the water supply device is characterized in that a water delivery channel is formed in the axis direction of the fixing rod, a water outlet communicated with the water delivery channel is formed in one end, far away from the fixing shell, of the fixing rod, a water inlet communicated with the water delivery channel is formed in the other end of the fixing rod, and the water inlet is connected with the water supply assembly.

In this scheme, utilize the water delivery passageway in water supply subassembly and the dead lever can directly add water to the container that is used for cooking rice, make the operation more convenient.

Preferably, the water-rice ratio control device further comprises an induction assembly, the induction assembly comprises an inductor and a target piece, the inductor is fixed to the fixed shell, the target piece is fixed to the guide sleeve, the inductor is used for detecting the position of the target piece and transmitting signals to the controller, and the inductor is in communication connection with the controller.

In this scheme, when the position that the inductor sensed the uide bushing took place to remove, the automatic water supply of water supply assembly was controlled to the controller.

Preferably, the water-rice ratio control device further comprises a first moving rod and a first non-contact sensor, the first moving rod is fixed to the second driven rack, the axial direction of the first moving rod is parallel to the moving direction of the second driven rack, the first non-contact sensor is mounted at one end, far away from the fixed shell, of the first moving rod, and the first non-contact sensor is in communication connection with the controller.

In the scheme, the first non-contact sensor is used for detecting the water adding amount in the container and transmitting a signal to the controller so as to realize the function of automatically closing the water supply assembly.

Preferably, the water-rice ratio control device further comprises a protective cover, the protective cover is fixed at one end of the first moving rod, the first non-contact sensor is located in the protective cover, and a plurality of through holes communicated with the outside are formed in the protective cover.

In this scheme, the rice can be kept apart to the protection casing to avoid first non-contact sensor to detect the height on big rice layer and send wrong signal to the controller.

Preferably, the water-rice ratio control device further comprises:

the third driven gear is coaxially and fixedly connected with the first driven gear;

and the third driven rack is meshed with the third driven gear, the moving direction of the third driven rack is the same as that of the driving rack, and the ratio of the moving speed of the third driven rack to that of the driving rack is a fixed value N which is greater than 1.

In the scheme, the third driven rack is matched with the third driven gear, so that the water-rice proportion control device can measure and calculate water and rice with different volume proportion relations.

Preferably, the water-rice ratio control device further comprises:

the first moving rod is fixed on the second driven rack, and the axial direction of the first moving rod is parallel to the moving direction of the second driven rack;

the second moving rod is fixed on the third driven rack, and the axial direction of the second moving rod is parallel to the moving direction of the third driven rack;

a first non-contact sensor mounted at an end of the first movable rod remote from the stationary housing, the first non-contact sensor being in communicative connection with the controller;

a second non-contact sensor mounted at an end of the second movable rod remote from the stationary housing, the second non-contact sensor being in communicative connection with the controller;

a switch electrically connected to the first non-contact sensor and the second non-contact sensor, the switch being configured to switch an on state of the first non-contact sensor and the second non-contact sensor.

In the scheme, the switcher can enable the water-rice proportion control device to measure and calculate water and rice with different volume proportion relations, and the function of automatically closing the water supply assembly is achieved.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows:

the gear and rack transmission relationship between the driving rack and the second driven rack is utilized, so that the driving rack and the second driven rack can move in the same direction, and the moving amounts of the driving rack and the second driven rack always keep the same proportional relationship, therefore, the height needing to be added with water can be accurately obtained through the moving amount of the second driven rack under the condition that the moving amount of the driving rack shows the height of a rice layer, and the function of accurately controlling the water-rice ratio is realized.

Drawings

Fig. 1 is a front view showing an internal structure of a water/rice ratio control apparatus according to a preferred embodiment of the present invention, in which a water passage is indicated by a dotted line.

Fig. 2 is a rear view showing the internal structure of the water-rice ratio control apparatus according to the preferred embodiment of the present invention.

Fig. 3 is a schematic perspective view of a rack and pinion transmission structure in a water-rice ratio control device in a preferred embodiment of the invention in a position state.

Fig. 4 is a schematic perspective view of a rack-and-pinion transmission structure in a water-rice ratio control device in another position state in accordance with a preferred embodiment of the present invention.

Fig. 5 is a schematic perspective view of a protective cover in the device for controlling the proportion of rice and water in accordance with the preferred embodiment of the present invention.

Description of reference numerals:

stationary casing 10

Fixing rod 20

Tip 21

Water delivery channel 22

Water outlet 23

Water inlet 24

Guide sleeve 30

Conical member 31

Contact surface 311

Drive gear 40

Active rack 50

First driven gear 60

Second driven gear 70

Second driven rack 80

Water supply assembly 90

Controller 100

Inductor 110

Target part 120

First moving bar 130

First non-contact sensor 140

Protective cover 150

Through hole 151

Third driven gear 160

Third driven rack 170

Second moving bar 180

Second non-contact sensor 190

Switch 200

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Fig. 1 and 2 show a water-rice ratio control apparatus, which includes: the fixed housing 10, the fixed lever 20, the guide housing 30, the driving gear 40, the driving rack 50, the first driven gear 60, the second driven gear 70, the second driven rack 80, and the first moving bar 130.

One end of the fixing rod 20 is fixed to the fixing housing 10, the guide sleeve 30 is sleeved outside the fixing rod 20, and the guide sleeve 30 is movable along the axial direction of the fixing rod 20. The driving gear 40 is pivoted to the stationary case 10. The driving rack 50 is fixed to the guide sleeve 30, the driving rack 50 is engaged with the driving gear 40, and the moving direction of the driving rack 50 is parallel to the axial direction of the fixing rod 20.

The first driven gear 60 is pivoted to the fixed housing 10, the first driven gear 60 and the driving gear 40 have the same module and are meshed with each other, and the first driven gear 60 and the driving gear 40 have the same pitch circle diameter. The second driven gear 70 is coaxially and fixedly connected with the first driven gear 60. The second driven rack 80 and the second driven gear 70 have the same module and are meshed with each other, and the moving direction of the second driven rack 80 is the same as the moving direction of the driving rack 50.

The ratio of the moving speed of the second driven rack 80 to the moving speed of the driving rack 50 is a fixed value M greater than 1. The first moving bar 130 is fixed to the second driven rack 80, and the axial direction of the first moving bar 130 is parallel to the moving direction of the second driven rack 80.

In the present embodiment, the modules of the driving gear 40, the driving rack 50, the first driven gear 60, the second driven gear 70 and the second driven rack 80 are the same, wherein the reference circle diameters of the driving gear 40 and the first driven gear 60 are the same, and the reference circle diameter ratio of the driving gear 40 to the second driven gear 70 is 1: 1.4. Namely: the angular velocity and linear velocity of the driving wheel and the first driven gear 60 are the same; the angular velocity of the driving wheel and the second driven gear 70 are the same, and the linear velocity ratio is 1: 1.4. Therefore, the ratio of the moving speed of the second driven rack 80 to the moving speed of the driving rack 50 is also 1.4: 1. from the connection relationship between the guide sleeve 30 and the driving rack 50 and the connection relationship between the second driven rack 80 and the first moving bar 130, the ratio of the moving speeds of the guide sleeve 30 and the first moving bar 130 is 1: 1.4.

in order to control the volume ratio of rice to water during cooking using the rice-water ratio control apparatus, an end of the guide sleeve 30 away from the stationary case 10, an end of the fixed lever 20 away from the stationary case 10, and an end of the first movable bar 130 away from the stationary case 10 are simultaneously located on a plane perpendicular to the axis of the fixed lever 20 in an initial state. When rice is flatly laid in a barrel-shaped or cuboid-shaped rice cooking container, one end of the fixing rod 20 far away from the fixing shell 10 is inserted into the rice, the guide sleeve 30 is always positioned on the upper surface of the rice layer under the blocking action of the rice, at the moment, the blocking action of the rice on the guide sleeve 30 is equivalent to pushing the guide sleeve 30 to move upwards relative to the fixing rod 20, and the moving distance is equal to the height of the rice layer. According to the transmission relationship between the guide sleeve 30 and the first moving bar 130, it can be seen that the first moving bar 130 is also moved upward at the same time, and the moving amount is 1.4 times of the height of the rice. At this time, the position corresponding to the end of the first moving rod 130 is the water level to be added with water.

For a certain kind of rice, when the volume ratio of the rice to water is 1:1.2, the hardness and the mouthfeel of the cooked rice are optimal. According to the measurement, the volume ratio of the rice to the water is 1:0.8 when the rice of the variety and the water are mixed and positioned at the same height in the bucket-shaped or rectangular parallelepiped-shaped rice cooking container. Therefore, in order to make the volume ratio of rice to water 1:1.2, water having a volume 0.4 times that of rice is added. That is, the height of the added water is equal to 0.4 times the height of the rice layer. The moving amount of the first moving rod 130 of the invention is equal to 1.4 times of the height of the rice layer, so the volume ratio of the water volume of the water level corresponding to the end part of the first moving rod 130 to the rice is just 1.2:1, and the optimal water-rice ratio requirement of the variety of rice is met.

When the variety of rice changes: the water absorption rate is changed, and the optimal volume ratio of water to rice is also changed; the size of the gaps between rice grains is different, and the volume ratio of rice and water at the same height is also different. Therefore, in other alternative embodiments, the reference diameter ratio of the driving gear 40 to the second driven gear 70 may be changed according to the rice variety, so that the rice ratio control device can measure the optimal water addition amount for different rice varieties.

In practical use, in order to prevent a portion of the guide sleeve 30 from entering the rice when the fixing rod 20 is inserted into the rice layer, the amount of upward movement of the guide sleeve 30 relative to the fixing rod 20 is smaller than the practical height of the rice layer, and the final water adding amount is affected. In the present invention, a tapered member 31 is disposed at one end of the guide sleeve 30 away from the fixing housing 10, an abutting surface 311 is disposed on the tapered member 31, the abutting surface 311 is perpendicular to the axial direction of the fixing rod 20, and the abutting surface 311 faces a direction away from the fixing housing 10. The abutting surface 311 increases the contact area of the guide sleeve 30 with the rice, so that the guide sleeve 30 can be effectively prevented from entering the rice.

Meanwhile, in order to facilitate the fixing rod 20 to be inserted into the rice and prevent the end of the fixing rod 20 from being blocked by the rice and not being inserted to the bottom, the end of the fixing rod 20 far away from the fixing housing 10 is a pointed end 21.

In order to save cost and reduce the weight of the device, most parts including the fixing rod 20 are made of plastic materials. The tip 21 of the fixing rod 20 made of plastic material is worn after being used for many times, and the measuring and calculating precision of the device is affected. Thus, in the present invention, the tip 21 is sleeved with a metal sleeve. The metal sleeve can protect the tip 21 and effectively prevent the tip 21 from being worn due to long-term use.

When the device is operated, an operator needs to keep the water-rice ratio control device in a vertical state by one hand and add water into the rice cooking container by the other hand by using a tool. The two are operated simultaneously, so that the two are difficult to be considered simultaneously, and the operation difficulty is increased. Meanwhile, when water is added into the rice cooking container by other tools, impact is inevitably caused on the rice layer of the rice cooking container, the surface of the rice layer is changed, and the accuracy of water adding amount is influenced. In order to solve the problem of difficult water adding, the water-rice ratio control device further comprises: a water supply assembly 90 and a controller 100. The water supply assembly 90 is used to output drinking water. The controller 100 is electrically connected to the water supply assembly 90, and the controller 100 is used for controlling the water supply assembly 90 to be opened or closed. A water delivery channel 22 is arranged in the axial direction of the fixing rod 20, a water outlet 23 communicated with the water delivery channel 22 is arranged at one end of the fixing rod 20 far away from the fixing shell 10, a water inlet 24 communicated with the water delivery channel 22 is arranged at the other end of the fixing rod 20, and the water inlet 24 is connected with the water supply assembly 90. Meanwhile, in order to ensure that the water-rice ratio control device is always in a vertical state, a horizontal bubble instrument (not shown in the figure) is installed on the top surface of the fixed shell 10, and an operator can determine whether the water-rice ratio control device is in the vertical state by observing the position of bubbles in the horizontal bubble instrument.

The controller 100 controls the water supply assembly 90 to start to output the drinking water into the rice cooking receptacle or controls the water supply assembly 90 to stop outputting the drinking water into the rice cooking receptacle according to the operator's instruction. The drinking water in the water supply assembly 90 can enter the water delivery passage 22 through the water inlet 24 on the fixing lever 20 and then be output to the rice cooking receptacle through the water outlet 23. The water in the water supply assembly 90 slowly enters the cooking receptacle, so that the impact on the surface of the rice layer can be prevented when the water is added.

In this embodiment, the device for controlling the water-rice ratio further comprises a sensing component, and the sensing component comprises a sensor 110 and a target 120. The inductor 110 is fixed to the stationary case 10, and the target member 120 is fixed to the guide sleeve 30. The sensor 110 is used to detect the position of the target member 120 and transmit a signal to the controller 100, and the sensor 110 is communicatively coupled to the controller 100. When the water-rice ratio control device is in an open state, the fixing rod 20 is inserted into the rice, and the guide sleeve 30 moves upward relative to the fixing rod 20, the sensor 110 detects that the position of the target member 120 changes, at this time, the sensor 110 transmits a signal to the controller 100, and the controller 100 controls the water supply assembly 90 to start outputting drinking water into the rice cooking container.

When the water supply amount of the water supply assembly 90 meets the requirement of the water-rice ratio, in order to realize the function of automatically closing the water supply assembly 90, the water-rice ratio control device further comprises a first non-contact sensor 140 and a protective cover 150. A first non-contact sensor 140 is installed at an end of the first moving bar 130 away from the stationary housing 10, and the first non-contact sensor 140 is communicatively connected to the controller 100. The shield 150 is fixed to one end of the first moving bar 130, the first non-contact sensor 140 is located in the shield 150, and the shield 150 is formed with a plurality of through holes 151 communicating with the outside.

When the water supply assembly 90 of the water/rice ratio control apparatus starts supplying water, the first non-contact sensor 140 is also in an operation state, which can detect a water level condition in the cooking receptacle in real time. When the first non-contact sensor 140 detects that the water level in the rice cooking container has reached the water level corresponding to the requirement of the water-rice ratio, the first non-contact sensor 140 sends a signal to the controller 100, and the controller 100 controls the water supply assembly 90 to stop outputting the drinking water into the rice cooking container.

The shield 150 is primarily used to prevent the first non-contact sensor 140 from detecting the height of the layer of rice and sending an erroneous signal to the controller 100. The first non-contact sensor 140 is located inside the shield 150 to be isolated from the rice, so that the first non-contact sensor 140 cannot detect the height of the rice layer. The through holes 151 of the shield 150 extend to the bottom of the shield 150, thereby ensuring that water can enter the interior of the shield through the through holes 151 when the shield 150 just contacts water. Meanwhile, the distance between the first non-contact sensor 140 and the inner wall of the shield 150 is greater than the detection distance of the first non-contact sensor 140, so the first non-contact sensor 140 does not emit a false detection signal due to the shield 150 itself. As the water level in the rice cooking container rises, water enters the shield 150 through the through-hole 151, and when the water level reaches the sensing position of the first non-contact sensor 140, the first non-contact sensor 140 senses the water level, and at this time, the first non-contact sensor 140 sends a signal to the controller 100.

In this embodiment, the end of the first movable rod 130, which is located on the same plane as the end of the guide sleeve 30 and the fixed rod 20, represents a position of the first movable rod 130 where the first non-contact sensor 140 can detect the water level.

In order to make the present invention suitable for cooking different kinds of rice or different degrees of softness, the present water-rice ratio control apparatus further comprises a third driven gear 160, a third driven rack 170, a second moving bar 180 and a second non-contact sensor 190. The third driven gear 160 is coaxially and fixedly connected with the first driven gear 60. The third driven rack 170 and the third driven gear 160 have the same module and are engaged with each other. The moving direction of the third driven rack 170 is the same as the moving direction of the driving rack 50, and the ratio of the moving speed of the third driven rack 170 to the moving speed of the driving rack 50 is a fixed value N greater than 1. The second moving bar 180 is fixed to the third driven rack 170, and an axial direction of the second moving bar 180 is parallel to a moving direction of the third driven rack 170.

As with the second driven gear 70, the second driven rack 80, and the first moving bar 130, the ratio of the moving speeds of the second moving bar 180 and the guide sleeve 30 is a fixed value N greater than 1, as is apparent from the coupling relationship between the guide sleeve 30 and the driving rack 50 and the coupling relationship between the third driven rack 170 and the second moving bar 180. The value of N is not equal to 1.4. When the height ratio of water to rice in the rice cooking container reaches N, the water-rice ratio of the rice of the variety is the optimal ratio.

A second non-contact sensor 190 is installed at an end of the second moving bar 180 away from the stationary case 10, and the second non-contact sensor 190 is communicatively connected to the controller 100. The second non-contact sensor 190 is also located within the shield 150 secured to the end of the second travel bar 180. When the second non-contact sensor 190 detects that the water level in the cooking receptacle has reached the water level required for the water-rice ratio, the second non-contact sensor 190 sends a signal to the controller 100, and the controller 100 controls the water supply assembly 90 to stop outputting the drinking water into the cooking receptacle.

In order to avoid the malfunction caused by the first non-contact sensor 140 and the second non-contact sensor 190 detecting the water level at the same time, the rice-water ratio control apparatus further includes a switch 200. The switch 200 is electrically connected to the first non-contact sensor 140 and the second non-contact sensor 190, and the switch 200 is used for switching the on states of the first non-contact sensor 140 and the second non-contact sensor 190. Therefore, according to different rice varieties, the operator can switch the first non-contact sensor 140 or the second non-contact sensor 190 to be in the on state through the switch 200, so that the water-rice ratio control device automatically detects the water level height corresponding to the optimal water-rice ratio relation of the rice variety, and controls the water supply assembly 90 to stop outputting the drinking water into the rice cooking container.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A water-rice ratio control device is characterized by comprising

A stationary case;

one end of the fixing rod is fixed on the fixing shell, and the end, far away from the fixing shell, of the fixing rod is a pointed end;

the guide sleeve is sleeved outside the fixed rod and can move along the axial direction of the fixed rod, a conical piece is arranged at one end, far away from the fixed shell, of the guide sleeve, an abutting surface is arranged on the conical piece and is perpendicular to the axial direction of the fixed rod, and the abutting surface faces the direction far away from the fixed shell;

a drive gear pivotally connected to the stationary housing;

the second driven rack, the second driven rack with the meshing of second driven gear mutually, the moving direction of second driven rack with the moving direction of initiative rack is the same, the moving distance of second driven rack with the ratio of the moving distance of initiative rack is for being greater than 1 fixed value M.

2. The water-rice ratio control device as claimed in claim 1, wherein the tip is sleeved with a metal sleeve.

3. The water-rice ratio control device as claimed in claim 1, further comprising:

a water supply assembly for outputting drinking water;

4. The water-rice ratio control device as claimed in claim 3, further comprising a sensing assembly, wherein the sensing assembly comprises a sensor and a target member, the sensor is fixed on the fixed shell, the target member is fixed on the guide sleeve, the sensor is used for detecting the position of the target member and transmitting a signal to the controller, and the sensor is in communication connection with the controller.

5. The water-rice ratio control device as claimed in claim 3, further comprising a first moving rod fixed to the second driven rack, the first moving rod having an axis direction parallel to the moving direction of the second driven rack, and a first non-contact sensor mounted at an end of the first moving rod away from the fixed housing, the first non-contact sensor being in communication with the controller.

6. The water-rice ratio control device as claimed in claim 5, further comprising a shield fixed to one end of the first moving rod, wherein the first non-contact sensor is located in the shield, and the shield has a plurality of through holes communicating with the outside.

7. The water-rice ratio control device as claimed in any one of claim 3, further comprising:

8. The water-rice ratio control device as claimed in claim 7, further comprising: