CN109077627B

CN109077627B - Temperature sensor, food processor aircraft nose and food processor

Info

Publication number: CN109077627B
Application number: CN201710447759.8A
Authority: CN
Inventors: 陈逸凡; 马志海; 刘传兰; 严平; 王志锋; 王新元
Original assignee: Midea Group Co Ltd; Guangdong Midea Consumer Electric Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Consumer Electric Manufacturing Co Ltd
Priority date: 2017-06-14
Filing date: 2017-06-14
Publication date: 2021-10-15
Anticipated expiration: 2037-06-14
Also published as: CN109077627A

Abstract

The invention discloses a temperature sensor, a food processor head and a food processor. The temperature sensor is used for measuring the temperature of the food processor and comprises a cylindrical shell (1) and a temperature measuring element (2), wherein an output shaft for a power supply machine is formed in the cylindrical shell and penetrates through an axial channel (11) which enables the cylindrical shell to be sleeved on the output shaft of a motor, and the temperature measuring element is arranged at an immersion end (13) of the cylindrical shell, which is used for contacting with liquid to be measured. The temperature sensor is mainly suitable for being mounted on the output shaft of the motor of the food processor, and the temperature measuring element is mounted at the immersion end and can be in direct contact with liquid to be measured, so that the temperature measuring efficiency of the temperature sensor is higher, more accurate and more timely, and the phenomenon of temperature measurement lag is avoided. And the temperature sensor is arranged on the output shaft of the motor in a sleeve type, so that the shaking of the output shaft can be reduced, and the stirring stability of the output shaft of the motor can be enhanced.

Description

Temperature sensor, food processor aircraft nose and food processor

Technical Field

The invention relates to the field of household appliances, in particular to a temperature sensor, a food processor head and a food processor.

Background

Food processor, the environment of the measurement of food processing's temperature is extremely important, for example the soybean milk temperature in the soybean milk machine, because the temperature measurement of accurate soybean milk solution can guarantee to control the time that the soybean milk heating is boiled thoroughly, can not lead to the soybean milk the condition unfamiliar, burnt or scorching to guarantee the quality and the user experience of good soybean milk.

In the temperature measurement method of the soybean milk solution of the soybean milk machine in the prior art, a temperature sensor (or a thermistor) is mainly adhered to the outer side of the cup wall of an inner cup, and the temperature measurement of the method has certain hysteresis, so that continuous high power (for preventing burning) is not generally set during heating when an electric control program is set, the soybean milk boiling speed is low, the waiting time of a user is prolonged, and the user experience is poor.

Disclosure of Invention

The invention aims to provide a novel temperature sensor which can be sleeved on an output shaft of a motor and can accurately and efficiently detect the temperature of liquid to be detected.

In order to achieve the above object, the present invention provides a temperature sensor for measuring temperature of a food processor, the temperature sensor including a cylindrical housing and a temperature measuring element, an axial channel is formed in the cylindrical housing for an output shaft of a power supply machine to pass through so that the cylindrical housing can be sleeved on the output shaft of the power supply machine, and the temperature measuring element is disposed at an immersion end of the cylindrical housing for contacting with a liquid to be measured.

Preferably, an axial accommodating cavity extending from the immersion end to the opposite end is formed in the side wall of the cylindrical shell, and the temperature measuring element is fixedly arranged in the axial accommodating cavity and is connected with a lead wire led out from an opening of the axial accommodating cavity.

Preferably, the opening is formed on an end surface of the other end of the cylindrical case.

Preferably, an annular flange for placing a seal member is radially inwardly protruded on an inner peripheral surface of the axial passage.

Preferably, the annular flange is disposed away from the immersion end so that both the inner and outer circumferential surfaces of the cylindrical housing corresponding to the temperature measuring element can contact the liquid to be measured.

Preferably, a sealing tooth segment for forming a seal is formed on an inner peripheral surface of the axial passage.

In addition, the invention also provides a food processor machine head, which comprises a motor, a machine head shell with a through hole and a turbulence piece, wherein the motor is arranged in the machine head shell, an output shaft of the motor penetrates out of the through hole, the food processor machine head comprises the temperature sensor, the cylindrical shell is fixedly assembled in the through hole in a sealing mode and sleeved on the output shaft, the output shaft penetrates out of the axial channel in a sealing mode, and the turbulence piece is sleeved on the outer side of the cylindrical shell.

Preferably, the end surface of the immersion liquid end is flush with the hole end surface of the through hole; alternatively, the first and second electrodes may be,

the immersion liquid end extends out of the through hole.

Preferably, a sealing member is provided between the cylindrical housing and an outer housing of the motor.

In addition, the invention also provides a food processor which comprises the food processor head.

Through the technical scheme, the axial channel for the output shaft of the power supply to pass through is formed in the cylindrical shell of the temperature sensor, and the temperature sensor can be installed on the output shaft of the motor, so that the installation mode of the temperature sensor is a novel installation structure. The temperature sensor with the novel structure is arranged on the output shaft of the motor in a sleeve mode, so that the shaking of the output shaft can be reduced, and the stability of the stirring of the output shaft of the motor can be enhanced. The temperature measuring element of the temperature sensor is arranged at the immersion end of the cylindrical shell, which is contacted with the liquid to be measured, so that the temperature measuring element can more directly and timely detect the liquid to be measured, and the phenomenon of temperature measurement lag is avoided, and the temperature measuring efficiency of the temperature sensor is higher, more accurate and more timely. Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a cross-sectional view of a temperature sensor according to a preferred embodiment of the present invention;

FIG. 2 is an axial cross-sectional view of a soymilk maker according to a preferred embodiment of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2.

Description of the reference numerals

1 cylindrical shell 2 temperature measuring element

3-lead 4-motor

5 inner side close to upper seal ring 6 inner side close to lower seal ring

7 outside sealing washer 8 vortex piece

11 axial channel 12 annular flange

13 cylindrical housing 14 axial accommodation chamber

15 opening 16 sealing tooth section

41 handpiece shell 42 through hole

43 output shaft

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like are generally described with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, or gravitational direction. The terms "inside" and "outside" refer to the inside of the cavity or the position relationship of the cylindrical shell relative to the output shaft of the motor.

Aiming at the food processor in the prior art, such as a soymilk machine, the temperature detection of the commonly used soymilk solution is detected by a temperature sensor, the temperature sensor is generally attached to the outer side of the cup wall of an inner cup, the problem of temperature detection delay exists, and some temperature sensors are arranged on the shell wall of the inner side of a handpiece shell.

The invention provides a novel temperature sensor which is used for measuring the temperature of a food processor. For example, a conventional food processor is a soymilk machine, the following embodiments all take the soymilk machine as an example, the temperature sensor can be used in the soymilk machine, as shown in fig. 1, fig. 2 and fig. 3, the temperature sensor comprises a cylindrical shell 1 and a temperature measuring element 2, an axial channel 11 for allowing an output shaft 42 of the motor to penetrate through is formed in the cylindrical shell 1, so that the cylindrical shell 1 can be sleeved on the output shaft 42 of the motor, and therefore, the temperature sensor of the invention is a novel sleeve type mounting structure capable of being sleeved on the output shaft 42 of the motor. The temperature sensor with the novel structure is arranged on the output shaft of the motor in a sleeve mode, so that the shaking of the output shaft 43 can be reduced, and the stability of the stirring of the output shaft of the motor can be enhanced. The temperature measuring element 2 is arranged at the immersion liquid end 13 of the cylindrical shell 1, which is used for contacting with the liquid to be measured, namely, the temperature measuring element 2 can more directly and more timely detect the liquid to be measured, and is arranged in the liquid to be measured instead of the edge of the liquid to be measured, so that the temperature measuring time of the temperature sensor is shorter, and the efficiency is higher, more accurate and more timely.

The material of the cylindrical case 1 is generally a member having a good thermal conductivity, and may be, for example, stainless steel (best practical), aluminum alloy, cast iron, or the like, and the outer surface thereof may be treated by spraying, anodizing, or the like in order to improve the surface hardness, wear resistance, and other defects of the member and to extend the service life. And the tubular housing 1 can be set to have a certain length structure along the axial direction of the motor output shaft 43, so that the tubular housing can be sleeved on the output shaft 43, the shaking of the output shaft 43 during working is reduced, and the immersion end 13 of the tubular housing can be more easily contacted with the liquid to be measured.

An axial accommodating chamber 14 extending from the immersion end 13 to the other end is formed in the side wall of the cylindrical case 1, and the temperature measuring element 2 is fixedly disposed in the axial accommodating chamber 14 and connected to the lead wire 3 led out from the opening 15 of the axial accommodating chamber 14. The working principle of the temperature sensor is as follows: the wire 3 is led out from one end of the temperature measuring element 2 in the axial accommodating cavity 14, the temperature measuring element 2 is basic to the liquid to be measured, corresponding voltage values are output according to sensing different temperature values, the collected voltage signals of the temperature sensor are transmitted to a control unit which can receive the temperature measuring signals input from the temperature measuring element 2 along the other end outside the opening 15, the control unit is generally arranged at the position, close to the display screen, of the top of the machine head, and the control unit converts the temperature into corresponding temperature, so that corresponding feedback processing (continuous heating or heating stopping) is carried out. Typically, the temperature measuring element 2 is a temperature sensing chip, such as an NTC, a metal thermal resistor (platinum, copper, nickel, iron-nickel, wherein platinum is the best temperature sensing metal material and linearity is better), a thermocouple, or a thermal diode. Because the direction of the opening 15 is opposite to the immersion end 13, namely the direction of the opening 15 is far away from the liquid to be measured, the temperature measuring element 2 can be accommodated in the axial accommodating cavity 14 and can not be in direct contact with the liquid, so that the phenomena of electric leakage, short circuit and the like are avoided.

In order not to affect the installation of the temperature sensor, the installation of the temperature sensor of the present invention depends on the contact or friction force of the inner and outer side walls of the cylindrical housing 1, such as installing a sealing ring on the inner and outer side walls thereof by screw threads or installing a sealing plug in an interference fit to fill up the gap and prevent water leakage, which will be further described below. As shown in fig. 1, the opening 15 of the cylindrical case 1 is preferably formed on an end surface of the other end of the cylindrical case 1 opposite to the immersion end 13, not on the inner and outer side walls of the cylindrical case 1, and the like.

When the temperature sensor is installed on the motor output shaft 43, a sealing ring is arranged between the inner side of the cylindrical shell 1 and the motor output shaft 43, and the sealing ring has the function of preventing liquid to be measured from entering the machine head from a gap between the inner side of the cylindrical shell 1 and the motor output shaft 43, so that the sealing and waterproof functions are achieved, and the limiting function can be achieved. An annular collar 12 for the placement of a seal, which may be provided in accordance with the actual design of the output shaft 43 of the electric motor 4, thus projects radially inwardly on the inner circumferential surface of the axial channel 11. In the soymilk grinder shown in fig. 2 and 3, when the output shaft 43 is a stepped shaft, two sealing rings are required to be sealed up and down, such as an upper sealing ring 5 at the inner side and a lower sealing ring 6 at the inner side in fig. 2 and 3; if the output shaft 43 is an optical axis with the same diameter, the function of the inner side upper sealing ring 5 and the inner side lower sealing ring 6 can be completed by only one sealing ring.

Preferably, the annular flange 12 is provided on the side of the motor output shaft 43 away from the dipping end 13 in the axial direction, and as shown in fig. 2, when the temperature measuring liquid is at the bottom of the cup, the temperature measuring element 2 is provided at the bottom end of the dipping end 13 dipped in the liquid surface, and the annular flange 12 is moved upward as much as possible, so that the inner peripheral surface of the bottom portion of the cylindrical case 1 corresponding to the temperature measuring element 2 can also be brought into direct contact with the temperature measuring liquid, and eventually both the inner peripheral surface and the outer peripheral surface of the cylindrical case 1 corresponding to the temperature measuring element 2 can be brought into contact with the temperature measuring liquid. Therefore, the temperature measuring element 2 can contact the liquid to be measured in a larger area, and the temperature of the liquid to be measured can be detected more accurately and timely.

As shown in fig. 3, preferably, a seal tooth segment 16 for forming a seal is formed on the inner peripheral surface of the axial passage 11. Namely, the inner side upper sealing ring 5 and the inner side lower sealing ring 6 can be connected through threads, so that the disassembly and the maintenance are convenient. The sealing form is not limited to the threaded connection, but may be various forms, such as a sealing ring installed with a seal by interference fit, and the like.

In addition, the invention also provides a food processor machine head, as shown in fig. 2, taking a soymilk grinder as an example, the soymilk grinder machine head comprises a motor 4, a machine head shell 41 with a through hole 42 and a spoiler 8, wherein the motor 4 is arranged in the machine head shell 41, and an output shaft 43 of the motor 4 penetrates out of the through hole 42. Wherein, the cylindrical shell 1 is fixedly assembled in the through hole 42 in a sealing way and sleeved on the output shaft 43, the output shaft 43 penetrates out of the axial channel 11 in a sealing way, and the turbulence piece 8 is sleeved on the outer side of the cylindrical shell 1 and can be directly sleeved or indirectly sleeved. The turbulence piece 8 is sleeved on the outer side of the cylindrical shell 1, so that the effect of crushing food can be improved; the temperature sensor can be protected, because when the whole machine head is taken out and the table top is placed, the spoiler 8 firstly contacts the table top, so that the temperature sensor cannot be directly abutted against the table top, and the temperature sensor cannot easily collide other objects to be damaged. Because the temperature sensor has the characteristics that the temperature measuring element 2 of the temperature sensor needs to be arranged in the soybean milk solution close to the bottom of the soybean milk machine so as to prevent the hysteresis of the temperature detection, the end surface of the immersion liquid end 13 is flush with the hole end surface of the through hole 42; alternatively, the immersion liquid end 13 protrudes from the through hole 42. So that the end surface of the dipping liquid end 13 of the temperature sensor is the lowest end and can be more easily contacted with the soybean milk solution. It should be noted that the temperature sensor is provided with a lead 3 connecting the temperature measuring element 2 and the control unit near the output shaft 43, i.e. the temperature sensor does not rotate with the output shaft 43, so as to prevent the temperature sensor from tearing the lead 3 along with the rotation of the output shaft 43.

In the head of the soymilk machine, a sealing element is arranged between the cylindrical shell 1 and the outer shell of the motor. Since the temperature sensor is installed at the through hole 42 of the head housing 41, the inner side of the cylindrical housing 1 is already sealed and sleeved on the output shaft 43, a sealing member is also required to be provided at the through hole 42 between the outer side of the cylindrical housing 1 and the head housing 41 to prevent the soybean milk liquid from entering the head to cause a short circuit or a pollution phenomenon. Like the outside sealing ring 7 in fig. 3, the sealing form can also be a thread or interference fit, and the like, so that the temperature sensor is sleeved on the motor rotating shaft and can be combined with the machine head shell 41 in a sealing manner, and the outer shell of the whole machine head of the soymilk machine is ensured to be in a sealing state, so as to prevent short circuit and facilitate cleaning. In this embodiment, the spoiler 8 is sleeved on the outer side of the sealing ring 7.

In addition, the invention also provides a food processor, which comprises the food processor head and the temperature sensor. The food processor comprises a soybean milk machine.

It should be noted that, the soymilk grinder of the present invention is provided with the temperature sensor of the present invention, so that the soymilk grinder can also be used for dry burning prevention test application in the production stage, and the specific dry burning prevention detection method has various ways, which are only exemplified herein and not limited to the following two ways: firstly, when the temperature sensor is electrified and heated, the temperature sensor does not detect the change of corresponding temperature, or when the temperature sensor is heated, the temperature sensor suddenly detects a large-amplitude step-type temperature drop, the liquid level below the probe of the temperature sensor can be judged, and the dry heating prevention mode is realized. Secondly, an insulation measure is made on the cylindrical shell 1 of the temperature sensor and the handpiece shell 41 (including the spoiler), then a lead is connected to the cylindrical shell 1 of the temperature sensor to the control unit, and a lead is also connected to the handpiece shell 41 to the control unit. When the cylindrical shell 1 and the handpiece shell 41 are both in the liquid to be detected, a short circuit is formed, and the control unit detects a short circuit signal and judges that the liquid is in a non-dry burning state; when any one of the cylindrical shell 1 and the handpiece shell 41 is not in the liquid to be detected, an open circuit is formed, and the control unit detects an open circuit signal and judges the dry-burning state.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. For example, the fixing form of the outer seal ring 7 may be changed to glue bonding or the like.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. A temperature sensor is characterized in that the temperature sensor is used for measuring the temperature of a food processor, the temperature sensor comprises a cylindrical shell (1) and a temperature measuring element (2), an axial channel (11) for an output shaft of a power supply to penetrate through is formed in the cylindrical shell (1) so that the cylindrical shell (1) can be sleeved on the output shaft of the motor, the temperature measuring element (2) is arranged at an immersion end (13) of the cylindrical shell (1) for contacting with the liquid to be measured, an annular flange (12) for placing a sealing element is radially and inwardly protruded on the inner circumferential surface of the axial channel (11), the annular flange (12) is arranged far away from the immersion end (13), so that the inner circumferential surface and the outer circumferential surface of the cylindrical shell (1) corresponding to the temperature measuring element (2) can be in contact with liquid to be measured.

2. A temperature sensor according to claim 1, wherein an axial receiving chamber (14) is formed in a side wall of the cylindrical housing (1) extending from the immersion end (13) towards the opposite end, the temperature measuring element (2) being fixedly arranged in the axial receiving chamber (14) and being connected to a lead (3) leading from an opening (15) of the axial receiving chamber (14).

3. The temperature sensor according to claim 2, wherein the opening (15) is formed on an end surface of the other end of the cylindrical case (1).

4. A temperature sensor according to any one of claims 1-3, wherein the axial passage (11) has a sealing tooth section (16) formed on its inner circumferential surface for forming a seal.

5. The utility model provides a food processor aircraft nose, includes motor (4), is formed with aircraft nose casing (41) and vortex piece (8) of through-hole (42), motor (4) set up in aircraft nose casing (41) and output shaft (43) of motor (4) are followed wear out in through-hole (42), its characterized in that, food processor aircraft nose includes according to any one of claim 1-4 temperature sensor, wherein, tubular casing (1) seals fixed the assembly and is in through-hole (42) and overlap on output shaft (43), output shaft (43) are followed sealed wearing out in axial channel (11), vortex piece (8) cover is established the tubular casing (1) outside.

6. The food processor head as defined in claim 5, wherein the end surface of the dipping end (13) is flush with the hole end surface of the through hole (42); alternatively, the first and second electrodes may be,

the immersion end (13) protrudes from the through hole (42).

7. The food processor head as defined in claim 5 or 6, wherein a sealing member is provided between the cylindrical housing (1) and an outer housing of the motor.

8. A food processor characterized in that it comprises a food processor head according to any one of claims 5-7.