Liquid heater capable of accurately controlling temperature

Abstract

The liquid heater comprises a kettle body, the kettle body comprises a kettle body, a kettle cover, a bottom cover and a heating device, the heating device is installed at a bottom opening of the kettle body, the kettle cover is arranged on a kettle opening in an opening or closing covering mode, the bottom cover is connected to the bottom of the kettle body, a closed cavity is formed between the bottom cover and the bottom face of the kettle body, and the heating device is installed on the kettle body. A liquid expansion temperature control seat is assembled and connected in the closed cavity, the liquid expansion temperature control seat is connected with a temperature sensing rod through a capillary tube, a thermal medium is arranged in the temperature sensing rod, and at least part of the temperature sensing rod extends into the inner cavity of the kettle body; according to the liquid heater, the temperature sensing rod of the liquid expansion type temperature controller and the capillary tube are used for conducting heat transfer, so that deformation of the power piece is controlled, on-off of a circuit is achieved, the heating temperature can be controlled, different temperatures can be set, and accurate temperature control is achieved.

Description

Technical Field

[0001] The utility model relates to the field of liquid heaters, in particular to a liquid heater with precise temperature control. Background Art

[0002] Existing liquid heaters and health kettles all use temperature sensors as temperature sensing mechanisms, which can set the temperature required by consumers according to their needs and obtain water of different temperatures. The water temperature is kept at a preset temperature. When using water, you can drink water of the set temperature without waiting for the water in the kettle to heat or cool down. However, with the improvement of living standards, people's requirements for drinking water temperature are becoming more and more diverse. Often, people not only drink room temperature water, but sometimes also need high temperature water to make tea and instant noodles, and medium temperature water to dilute honey and mix milk powder.

[0003] At present, the negative temperature coefficient temperature sensors (NTC for short) commonly used on the market include pointed NTC and flat-head NTC. Due to its own structure, the pointed NTC has the advantages of fast heat transfer and rapid temperature response, and is widely used in health pots and tea makers. However, the pointed NTC is easy to scratch the inside of the pot and is not easy to clean; the flat-head NTC is NTC wrapped in metal, which causes slow heat transfer and severe hysteresis in temperature detection. It is impossible to accurately control the temperature during the heating process, resulting in the water temperature not meeting the ideal requirements.

[0004] Therefore, the applicant provides a new temperature sensing solution for consumers to choose and use by improving and perfecting the existing technology. Summary of the invention

[0005] The utility model aims to provide a liquid heater with precise temperature control which has simple and reasonable structure, convenient installation and stable structure.

[0006] A precise temperature-controlled liquid heater comprises a kettle body, wherein the kettle body comprises a kettle body, a kettle lid, a bottom cover and a heating device, wherein the heating device is installed at the bottom opening of the kettle body, the kettle lid can be opened or closed and is arranged on the kettle mouth, the bottom cover is connected to the bottom of the kettle body and forms a closed cavity with the bottom surface of the kettle body, a liquid-expanding temperature control seat is assembled and connected in the closed cavity, the liquid-expanding temperature control seat is connected to a temperature sensing rod with a built-in heat medium through a capillary tube, and the temperature sensing rod at least partially extends into the inner cavity of the kettle body.

[0007] The purpose of the utility model can also be solved by the following technical measures:

[0008] As a more specific solution, the liquid expansion temperature control seat includes an electrical seat and a temperature control body that cooperates with the electrical seat. The temperature control body is connected to an adjustment shaft, which extends out of the bottom cover and is connected to a temperature adjustment knob.

[0009] As a further solution, a through hole is opened on the bottom surface of the kettle body, and the temperature sensing rod passes through the through hole and vertically extends into the inner cavity of the kettle body, and a sealing ring is sleeved on the outside of the temperature sensing rod at a height corresponding to the through hole, and the sealing ring is sealed with the through hole.

[0010] As a further solution, the heating device includes a heating plate, which is sealed and crimped on the bottom opening of the kettle body; the through hole is opened at the center of the heating plate, and the temperature sensing rod is placed at the central axis position of the inner cavity of the kettle body.

[0011] As a further solution, a metal straight tube is vertically arranged in the inner cavity of the kettle body, the metal straight tube is coaxially arranged corresponding to the through hole, and the metal straight tube is sleeved on the outside of the temperature sensing rod.

[0012] As a further solution, it also includes an energy-gathering hood, which is arranged on the inner bottom surface of the pot body. The metal straight tube is integrally connected to the upper side of the energy-gathering hood. The bottom port of the metal straight tube is connected to the inner cavity of the bottom of the energy-gathering hood, and the top port of the metal straight tube is connected to the inner cavity of the pot body.

[0013] As a further solution, a center positioning groove is recessed on the heating plate, the shape of the energy collecting cover matches the shape of the center positioning groove, and the diameter of the energy collecting cover is smaller than the pot mouth, and the energy collecting cover can be detachably positioned on the inner bottom surface of the pot body through the center positioning groove.

[0014] As a further solution, the energy collecting hood includes a flat top wall, the edge of which extends downwardly with a side wall, the side wall is positioned and embedded in the central positioning groove, and its upper part is higher than the central positioning groove, and the upper part of the side wall is smaller than the lower part of the side wall.

[0015] As a further solution, it also includes a base, and the kettle body is detachably mounted on the base; a lower coupler is arranged on the base, and an upper coupler electrically coupled to the lower coupler is correspondingly arranged at the bottom of the kettle body, and the upper coupler is electrically connected to the heating device and the liquid expansion temperature control seat.

[0016] The beneficial effects of the utility model are as follows:

[0017] The utility model discloses a liquid heater with precise temperature control. This electric kettle utilizes the temperature sensing rod and capillary of the liquid expansion type temperature controller to transfer heat, thereby controlling the deformation of the power part, thereby realizing the on-off of the circuit, and can control the heating temperature, set different temperatures, and realize precise temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the utility model.

[0019] Figure 2 This is a schematic diagram of the setting of the adjustment knob in the utility model.

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the kettle body and the base in the utility model.

[0021] Figure 4 for Figure 1 Enlarged structural diagram at A in the middle.

[0022] Figure 5 It is a schematic diagram of the structure of the liquid temperature rising control seat of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figures 1 to 5 As shown, a precise temperature-controlled liquid heater comprises a kettle body 1, wherein the kettle body 1 comprises a kettle body 3, a kettle cover 4, a bottom cover 5 and a heating device, wherein the heating device is mounted at the bottom opening of the kettle body 3, the kettle cover 4 can be opened or closed and is disposed on the kettle mouth, the bottom cover 5 is connected to the bottom of the kettle body 3, and forms a closed cavity A with the bottom surface of the kettle body 3, wherein a liquid-expanding temperature control seat 7 is assembled and connected in the closed cavity A, and the liquid-expanding temperature control seat 7 is connected to a temperature-sensing rod 9 with a built-in heat medium via a capillary 8, and the temperature-sensing rod 9 at least partially extends into the inner cavity of the kettle body 1.

[0025] This electric kettle utilizes the temperature sensing rod 9 and the capillary 8 of the liquid expansion thermostat to transfer heat, thereby controlling the deformation of the power part, thereby realizing the on-off of the circuit, and can control the heating temperature, set different temperatures, and realize precise temperature control.

[0026] The liquid expansion temperature control seat 7 includes an electrical seat 71 and a temperature control body 72 that cooperates with the electrical seat 71. The temperature control body 72 is connected to an adjustment shaft 73. The adjustment shaft 73 extends out of the bottom cover 5 and is connected to a temperature adjustment knob 74. Different temperatures can be set at any time for heating or insulation through the temperature adjustment knob 74, and the temperature control is accurate.

[0027] A through hole 301 is provided on the bottom surface of the kettle body 3, and the temperature sensing rod 9 vertically extends into the inner cavity of the kettle body 1 through the through hole 301, and a sealing ring 10 is sleeved on the outside of the temperature sensing rod 9 at a height corresponding to the through hole 301. The sealing ring 10 is an I-shaped sealing ring, and the sealing ring 10 is sealed with the through hole 301; it can seal the gap between the temperature sensing rod 9 and the through hole 301 to avoid water leakage.

[0028] The heating device includes a heating plate 6, and an annular sealing ring 61 is provided on the lower side of the edge of the heating plate 6. The heating plate 6 is sealed and crimped on the bottom opening of the kettle body 3 through the annular sealing ring 61; the through hole 301 is opened at the center of the heating plate 6, and the temperature sensing rod 9 is placed at the central axis position of the inner cavity of the kettle body 1; the temperature sensing rod 9 is set at the central position, so that the temperature sensing rod 9 can sense temperature more accurately and improve the response speed of the temperature sensing rod 9.

[0029] In addition, a sudden jump thermostat 16 is also connected to the bottom of the heating disk 6. When the heating disk 6 works abnormally, the sudden jump thermostat 16 disconnects the working circuit of the heating disk 6 to improve the safety of the electric kettle. The sealing ring 10 is arranged between the heating disk 6 and the temperature sensing rod 9. In addition to the sealing effect, it can also have a heat insulation effect to prevent the heating temperature of the heating disk 6 from affecting the temperature sensing accuracy of the temperature sensing rod 9.

[0030] A metal straight tube 11 is vertically arranged in the inner cavity of the kettle body 1 , the metal straight tube 11 is coaxially arranged corresponding to the through hole 301 , and the metal straight tube 11 is sleeved on the outside of the temperature sensing rod 9 ; the metal straight tube 11 plays a role in supporting and protecting the temperature sensing rod 9 .

[0031] It also includes an energy-gathering cover 12, which is arranged on the inner bottom surface of the kettle body 1, and the metal straight tube 11 is integrally connected to the upper side of the energy-gathering cover 12. The bottom port of the metal straight tube 11 is connected to the inner cavity of the bottom of the energy-gathering cover 12, and the top port of the metal straight tube 11 is connected to the inner cavity of the kettle body; the metal straight tube 11 is fixed by the energy-gathering cover 12, so that the metal straight tube 11 supports the temperature sensing rod 9.

[0032] The energy gathering cover 12 is provided with a connecting structure connecting the inner cavity of the cover bottom and the inner cavity of the kettle body 1 . The connecting structure can be a connecting hole 301 opened on the side wall of the energy gathering cover 12 , or a gap between the energy gathering cover 12 and the heating plate 6 .

[0033] Based on the above structure, the metal straight pipe 11 further forms an upper water pipe. During use, the energy-gathering hood 12 reduces the flow of water in the inner cavity at the bottom of the hood, so that the water temperature rises faster. After pressure is formed in the inner cavity at the bottom of the hood, hot water is pushed into the metal straight pipe 11. On the one hand, the hot water flows through the temperature sensing rod 9, causing the temperature sensing rod 9 to sense temperature.

[0034] The heating plate 6 is provided with a central positioning groove 601, the shape of the energy collecting cover 12 matches the shape of the central positioning groove 601, and the diameter of the energy collecting cover 12 is smaller than the pot mouth, and the energy collecting cover 12 is detachably positioned on the inner bottom surface of the pot body 1 through the central positioning groove 601;

[0035] The central positioning groove 601 can position the energy gathering cover 12, and the central positioning groove 601 has a certain depth compared with the energy gathering cover 12 (the depth is approximately equal to half of the height of the energy gathering cover 12), so that the energy gathering cover 12 is not easy to shake and shift from the central positioning groove 601 after the pressure is lifted, and remains in the center position; and because the energy gathering cover 12 is detachable, it is convenient for cleaning in the future, so the diameter of the energy gathering cover 12 must be smaller than the diameter of the pot mouth, so that the energy gathering cover 12 can be taken out and placed in the inner cavity of the pot body 1.

[0036] As for the energy-gathering cover 12 in this embodiment, a flat structure is adopted, which can reduce the space occupied by the energy-gathering cover 12 in the inner cavity of the kettle body 1, so that more food can be placed in the inner cavity of the kettle body 1.

[0037] The energy-gathering cover 12 includes a flat top wall 121, and a side wall 122 extends downward from the edge of the top wall 121. The side wall 122 is positioned and embedded in the central positioning groove 601, and its upper portion 122a is higher than the central positioning groove 601, and the upper portion 122a of the side wall 122 is smaller than the lower portion 122b of the side wall 122. The energy-gathering cover 12 with this structure reduces the space occupied by the inner cavity of the pot body, so that the inner cavity of the pot body can accommodate more food.

[0038] It also includes a base 2, and the kettle body 1 is detachably mounted on the base 2; a lower coupler 21 is arranged on the base 2, and an upper coupler 15 electrically coupled to the lower coupler 21 is correspondingly arranged at the bottom of the kettle body 1, and the upper coupler 15 is electrically connected to the heating device and the liquid expansion temperature control seat 7; the lower coupler 21 is connected to the power grid, and the lower coupler 21 and the upper coupler 15 are separated and coupled by taking and placing the kettle body 1, thereby realizing power on or off.

[0039] In this embodiment, the electrical base 71 includes a base 711, and two electrical pins 712 are connected to the base 711, wherein one electrical pin 712 is connected to a static contact piece 713, and a static contact point 714 is installed on the static contact piece 713, and the other electrical pin 712 is connected to a spring seat 715, and the spring seat 715 is connected to the fixed end of a spring piece 716, and a moving contact point 718 elastically contacting with the static contact piece 713 is installed on the movable end of the spring piece 716, and a spring piece 717 is provided at the movable end of the spring piece 716 to abut against the other end of the spring seat 715;

[0040] The temperature control body 72 includes a bracket 721 connected to the base 711, a membrane box 722 placed in the bracket 721 and a push rod 723, the adjustment shaft 73 is threadedly connected to the bracket 721, the adjustment shaft 73 is coaxially against the outer side of the membrane box 722 and pushes the membrane box 722 to move back and forth, the membrane box 722 is connected to one end of the capillary 8, the push rod 723 is fixed on the inner side of the membrane box 722 and is coaxially arranged with the adjustment shaft 73, and the pressure is on the spring sheet 716.

[0041] The above is a preferred embodiment of the utility model, which shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model, and these changes and improvements fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A precise temperature-controlled liquid heater, comprising a kettle body, the kettle body comprising a kettle body, a kettle cover, a bottom cover and a heating device, the heating device being mounted at the bottom opening of the kettle body, the kettle cover being openable or closable and being mounted on the kettle mouth, the bottom cover being connected to the bottom of the kettle body and forming a closed cavity with the bottom surface of the kettle body, characterized in that: A liquid expansion temperature control seat is assembled and connected in the closed cavity, and the liquid expansion temperature control seat is connected to a temperature sensing rod with built-in heat medium through a capillary tube, and at least a part of the temperature sensing rod extends into the inner cavity of the kettle body.

2. A liquid heater with precise temperature control according to claim 1, characterized in that: The liquid expansion temperature control seat includes an electrical seat and a temperature control body matched with the electrical seat. The temperature control body is connected with an adjustment shaft, which extends out of the bottom cover and is connected with a temperature adjustment knob.

3. The precise temperature-controlled liquid heater according to claim 1, characterized in that: A through hole is provided on the bottom surface of the kettle body, and the temperature sensing rod passes through the through hole and vertically extends into the inner cavity of the kettle body. A sealing ring is sleeved on the outside of the temperature sensing rod at a height corresponding to the through hole, and the sealing ring is sealed and matched with the through hole.

4. The precise temperature-controlled liquid heater according to claim 3, characterized in that: The heating device comprises a heating plate, which is sealed and pressed on the bottom opening of the kettle body; the through hole is opened at the center of the heating plate, and the temperature sensing rod is placed at the central axis position of the inner cavity of the kettle body.

5. A liquid heater with precise temperature control according to claim 3 or 4, characterized in that: A metal straight tube is vertically arranged in the inner cavity of the kettle body, the metal straight tube is coaxially arranged corresponding to the through hole, and the metal straight tube is sleeved on the outer side of the temperature sensing rod.

6. The precise temperature-controlled liquid heater according to claim 5, characterized in that: It also includes an energy-gathering cover, which is arranged on the inner bottom surface of the pot body. The metal straight tube is integrally connected to the upper side of the energy-gathering cover. The bottom port of the metal straight tube is connected to the inner cavity of the bottom of the energy-gathering cover, and the top port of the metal straight tube is connected to the inner cavity of the pot body.

7. The precise temperature-controlled liquid heater according to claim 4, characterized in that: The heating plate is provided with a center positioning groove, the shape of the energy collecting cover matches the shape of the center positioning groove, and the diameter of the energy collecting cover is smaller than the pot mouth. The energy collecting cover is detachably positioned on the inner bottom surface of the pot body through the center positioning groove.

8. The precise temperature-controlled liquid heater according to claim 7, characterized in that: The energy gathering cover comprises a flat top wall, the edge of which extends downwardly to form a side wall, the side wall is positioned and embedded in the central positioning groove, and the upper part of the side wall is higher than the central positioning groove, and the upper part of the side wall is smaller than the lower part of the side wall.

9. The precise temperature-controlled liquid heater according to claim 1, characterized in that: It also includes a base, and the kettle body is detachably mounted on the base; a lower coupler is arranged on the base, and an upper coupler electrically coupled to the lower coupler is correspondingly arranged at the bottom of the kettle body, and the upper coupler is electrically connected to the heating device and the liquid expansion temperature control seat.

Images