Temperature control device of foot bath device

Abstract

The utility model discloses a temperature control device of a foot bath device, which comprises a heating body and a temperature control switch, the heating body and the temperature control switch are electrically connected with a controller, and a heat insulation pad is arranged between the heating body and the temperature control switch; the heating device has the advantages that the heating time can be shortened, and the service life of the heating body can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, in particular to a temperature control device for a foot bath. Background Art

[0002] A footbath is a device used for foot soaking and massage to relieve fatigue, promote blood circulation and relax the body. A temperature control device is provided in the footbath, including a heating element and a temperature control switch. The heating element, the temperature control switch and the controller are electrically connected. The heating element is used to heat the water. The temperature control switch is used to sense the temperature of the water and cooperate with the controller to disconnect or connect the circuit of the heating element to maintain the water within a specified temperature range.

[0003] The temperature control switch generally adopts a snap-action temperature control switch with a built-in bimetallic strip. The principle that the bimetallic strip will jump instantly under the action of temperature is used to make the contact point move quickly to achieve the purpose of disconnecting or connecting the circuit. Conventionally, during the heating process, the water temperature around the heating element is higher than the water temperature in other areas. In order to avoid burns, the snap-action temperature control switch is generally attached to the surface of the heating element, which is safer.

[0004] However, during the actual heating process, the heating element will be heated up and its temperature will quickly reach or exceed the specified temperature. The heat will not only be transferred to the surrounding water, but will also be directly transferred to the sudden temperature control switch. The bimetallic strip will jump instantly under the action of temperature, open the contacts and disconnect the circuit, mistakenly believing that the water temperature has reached the specified temperature. At this time, the heating element stops working, but the water in the footbath has not reached the specified temperature. After the heat of the heating element is fully transferred to the surrounding water and cooled, the bimetallic strip closes the contacts and connects the circuit, and the heating element is heated up again, and this cycle is repeated until the water in the footbath finally reaches the specified temperature. It generally takes 45 to 60 minutes to heat the water, which is a long time, and the heating element is frequently opened and closed, which is not conducive to long-term use. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a temperature control device for a foot bath, which can shorten the heating time and help to prolong the service life of the heating element.

[0006] The technical solution adopted by the utility model to solve the above technical problems is: a temperature control device for a foot bath, including a heating element and a temperature control switch, the heating element and the temperature control switch are electrically connected to a controller, and an insulation pad is arranged between the heating element and the temperature control switch.

[0007] Preferably, the temperature control switch comprises a shell with an opening at one end and a cover, the cover covers the opening of the shell, a mounting cavity is formed between the shell and the cover, and the thermal insulation pad is arranged between the heating element and the cover.

[0008] Preferably, a ring is provided at one end of the thermal insulation pad, and the ring is sleeved on the outside of the sealing cover.

[0009] Preferably, the thermal insulation pad is a silicone pad.

[0010] Preferably, the sleeve ring is a silicone ring, and the silicone ring is integrally formed with the silicone pad.

[0011] Preferably, a limiting ring is fixedly provided on the inner side surface of the collar, and the sealing cover is clamped between the thermal insulation pad and the limiting ring.

[0012] Preferably, the cover is an aluminum alloy cover.

[0013] Preferably, a moving contact piece, a stationary contact piece, a guide frame, a bimetallic sheet, an actuating rod and a rivet are arranged in the installation cavity, and the bimetallic sheet is located between the cover and the guide frame.

[0014] Preferably, the thickness of the bimetallic strip is 0.18±0.01 mm.

[0015] Compared with the prior art, the advantages of the utility model are:

[0016] 1. By placing an insulation pad between the heating element and the temperature control switch, the insulation pad can slow down the rate at which the heat generated by the heating element is transferred from there to the temperature control switch, reducing the possibility of the temperature control switch disconnecting the circuit during the heating process. The water in the foot bath can continue to heat up and quickly reach the specified temperature, which can not only shorten the heating time, but also help to extend the service life of the heating element;

[0017] 2. When the temperature detected by the temperature control switch reaches the specified temperature, the circuit is disconnected. At this time, the temperature of the water in the foot bath reaches the specified temperature. The temperature of the heating element itself is higher than the temperature of the water. The heat of the heating element is slowly transferred to the water to continuously control the temperature of the water near the specified temperature. When the temperature detected by the temperature control switch is lower than the specified temperature, the circuit is closed and the heating element starts to work again. This process can repeatedly control the temperature of the water continuously and accurately near the specified temperature with a small error. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The cross-sectional structure of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 The cross-sectional structure of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 3 The cross-sectional structure of the utility model is shown in FIG. Figure 3 .

[0021] In the figure: 1. heating element; 2. temperature control switch; 21. housing; 22. cover; 23. moving contact piece; 24. stationary contact piece; 25. guide frame; 26. bimetallic sheet; 27. actuating rod; 28. rivet; 3. thermal insulation pad; 4. collar; 5. limit ring. DETAILED DESCRIPTION

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] Embodiment 1: Figure 1 As shown, a temperature control device for a foot bath includes a heating element 1 and a temperature control switch 2. The heating element 1, the temperature control switch 2 and a controller (not shown in the figure) are electrically connected, and a heat insulation pad 3 is arranged between the heating element 1 and the temperature control switch 2.

[0025] In this embodiment, the temperature control switch 2 adopts a snap-type temperature control switch, including a shell 21 with an opening at one end and a cover 22. The cover 22 covers the opening of the shell 21. An installation cavity is formed between the shell 21 and the cover 22. A moving contact piece 23, a static contact piece 24, a guide frame 25, a bimetallic strip 26, an actuating rod 27 and a rivet 28 are arranged in the installation cavity. The bimetallic strip 26 is located between the cover 22 and the guide frame 25, and the thermal insulation pad 3 is arranged between the heating element 1 and the cover 22.

[0026] In this embodiment, the thermal insulation pad 3 is preferably a silicone pad, which has the advantages of high temperature resistance, chemical corrosion resistance, non-toxicity and tastelessness, good electrical insulation, good waterproofness, and is easy to process and shape.

[0027] It should be noted that the heating element 1 generally adopts a PTC heating element, and the electrical connection method between the heating element 1, the temperature control switch 2 and the controller is a conventional technical means in the field, generally connected in series, which will not be elaborated here.

[0028] This technical solution sets a heat insulation pad 3 between the heating element 1 and the temperature control switch 2. The heat insulation pad 3 can slow down the rate at which the heat generated by the heating element 1 is transferred from there to the temperature control switch 2, reducing the possibility of the temperature control switch 2 disconnecting the circuit during the heating process. The water in the foot bath can continue to heat up and quickly reach the specified temperature. The heating time can be shortened from the conventional 45 to 60 minutes to 25 to 40 minutes. When the heating element 1 is working, the heat it generates is transferred to the water body, and slowly transferred to the temperature control switch 2 through the heat insulation pad 3. When the temperature of the entire water body reaches the specified temperature, the temperature of the temperature control switch 2 also reaches the specified temperature. At this time, the temperature control switch 2 disconnects the circuit. It can be seen that the heating element 1 is continuously working during the heating of the water body, which can not only shorten the heating time, but also help to extend the service life of the heating element 1.

[0029] When the temperature detected by the temperature control switch 2 reaches the specified temperature, the circuit is disconnected. At this time, the temperature of the water in the foot bath reaches the specified temperature. The temperature of the heating element 1 itself is higher than the temperature of the water. The heat of the heating element 1 is slowly transferred to the water to continuously control the temperature of the water near the specified temperature. When the temperature detected by the temperature control switch 2 is lower than the specified temperature, the circuit is closed and the heating element 1 starts to work again. This process is repeated to continuously and accurately control the temperature of the water near the specified temperature, with a small error of about ±1°C, and a better user experience. The error of conventional temperature control devices is generally ±3°C, and may even reach ±5°C.

[0030] Embodiment 2: Figure 2 As shown, the rest of the parts are the same as those in the first embodiment, except that a collar 4 is provided at one end of the heat insulation pad 3, and the collar 4 is sleeved on the outside of the cover 22. By providing the collar 4, the rate at which heat is conducted from the side to the bimetallic strip 26 can be slowed down, and the possibility of the bimetallic strip 26 jumping during the heating process can be reduced, ensuring that the water in the foot bath can continue to heat up and quickly reach the specified temperature.

[0031] In this embodiment, the cover 22 is an aluminum alloy cover. Conventional cover 22 is a pure aluminum cover with high thermal conductivity. By using an aluminum alloy cover, it is helpful to reduce the thermal conductivity of the cover 22, so as to slow down the rate at which the heat of the heating element 1 is transferred to the bimetallic strip 26, and reduce the possibility of the bimetallic strip 26 jumping during the heating process, so as to ensure that the water in the foot bath can continue to heat up and quickly reach the specified temperature.

[0032] In this embodiment, the thickness of the bimetallic strip 26 is 0.18±0.01 mm. The conventional thickness of the bimetallic strip 26 is 0.15 mm. By thickening the bimetallic strip 26, the temperature control switch 2 can respond to temperature changes more smoothly and stably, reducing false operations.

[0033] Embodiment 3: The rest of the parts are the same as those of Embodiment 2, except that the sleeve ring 4 is a silicone ring, which is integrally formed with the silicone pad to facilitate one-time processing and forming.

[0034] Embodiment 4: Figure 3 As shown, the rest of the parts are the same as those in Example 3, the difference being that a limiting ring 5 is fixedly arranged on the inner side surface of the ring 4, and the cover 22 is clamped between the thermal insulation pad 3 and the limiting ring 5. The limiting ring 5 can play a certain limiting role, so that the silicone pad and the silicone ring are stably coated on the surface of the cover 22, thereby improving the stability of the connection. At the same time, the limiting ring 5 abuts against the shell 21, and can also play a certain waterproof sealing effect, thereby improving the sealing between the cover 22 and the shell 21.

[0035] Preferably, the limiting ring 5 is made of silicone, and the limiting ring 5, the sleeve ring 4 and the heat insulating pad 3 are integrally formed, which is convenient for one-time processing and forming.

[0036] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A temperature control device for a foot bath, comprising a heating element (1) and a temperature control switch (2), wherein the heating element (1) and the temperature control switch (2) are electrically connected to a controller, characterized in that A heat insulation pad (3) is provided between the heating element (1) and the temperature control switch (2); The temperature control switch (2) comprises a shell (21) with an opening at one end and a cover (22), wherein the cover (22) covers the opening of the shell (21), a mounting cavity is formed between the shell (21) and the cover (22), and the heat insulation pad (3) is arranged between the heating element (1) and the cover (22).

2. A temperature control device for a foot bath according to claim 1, characterized in that A collar (4) is provided at one end of the heat insulation pad (3), and the collar (4) is sleeved on the outside of the sealing cover (22).

3. A temperature control device for a foot bath according to claim 2, characterized in that The heat insulation pad (3) is a silica gel pad.

4. A temperature control device for a foot bath according to claim 3, characterized in that The sleeve ring (4) is a silicone ring, and the silicone ring and the silicone pad are integrally formed.

5. A temperature control device for a foot bath according to claim 2, characterized in that A limiting ring (5) is fixedly arranged on the inner side surface of the collar (4), and the sealing cover (22) is clamped between the thermal insulation pad (3) and the limiting ring (5).

6. A temperature control device for a foot bath according to claim 1, characterized in that The sealing cover (22) is an aluminum alloy sealing cover.

7. The temperature control device for a foot bath according to claim 1, characterized in that A moving contact piece (23), a stationary contact piece (24), a guide frame (25), a bimetallic sheet (26), an actuating rod (27) and a rivet (28) are arranged in the installation cavity, and the bimetallic sheet (26) is located between the sealing cover (22) and the guide frame (25).

8. A temperature control device for a foot bath according to claim 7, characterized in that The thickness of the bimetallic strip (26) is 0.18±0.01 mm.

Images