A high-temperature steam spray cleaning device for a dishwasher

Abstract

The application discloses a high-temperature steam spraying cleaning device of a dishwasher, and belongs to the field of dishwasher accessories. The cleaning device comprises a sleeve shell rotatably connected with a water inlet pipe, a heating pipe arranged in the sleeve shell, and a water outlet pipe connected with the sleeve shell, a water cavity is arranged in the sleeve shell, a water inlet opening communicated with the water inlet pipe and at least two water outlet openings communicated with the water cavity are arranged at the end of the sleeve shell, the heating pipe comprises a pipe body connected with the sleeve pipe and a heating cavity arranged in the pipe body, the heating cavity is communicated with the water inlet opening and the water cavity, the heating pipe makes the pressure in the water cavity reach a threshold range within a certain time, and the water outlet pipe is communicated with the water outlet opening and is used for discharging steam and forming a rotating torque to rotate the sleeve shell. The application solves the problems in the prior art that the washing efficiency is reduced, the water and power consumption is increased, and the safety and stability are limited due to the limitation of the motor.

Description

Technical Field

[0001] This invention belongs to the field of dishwasher accessories, specifically a high-temperature steam spray cleaning device for a dishwasher. Background Technology

[0002] Dishwashers are devices used in restaurants and homes to automatically clean tableware such as bowls, chopsticks, plates, dishes, knives, and forks. They reduce labor intensity, improve work efficiency, and have better cleaning and disinfection effects than hand washing. The dishwasher sprayer is the most critical component for achieving high-efficiency washing performance.

[0003] If the pump casing needs to be equipped with an oil seal to prevent water from entering the rotor, in order to avoid the oil seal being damaged, the motor speed cannot be further increased, which will prevent the dishwasher efficiency from being improved and limit its safety and stability. In addition, the use of AC motors results in greater noise, energy consumption, vibration and size.

[0004] In summary, existing spray systems suffer from reduced washing efficiency, increased water and electricity consumption, and compromised safety and stability due to limitations imposed by the motor. Summary of the Invention

[0005] Purpose of the invention: To provide a high-temperature steam spray cleaning device for a dishwasher, which can solve the problems of reduced washing efficiency, increased water and power consumption, and limited safety and stability caused by the limitations of the motor in the prior art.

[0006] The technical solution of the present invention is: a high-temperature steam spray cleaning device for a dishwasher, which is connected to the water inlet pipe of the dishwasher.

[0007] The cleaning device includes: a housing rotatably connected to a water inlet pipe, a heating pipe disposed inside the housing, and a water outlet pipe connected to the housing, wherein the water outlet pipe is arranged at an angle.

[0008] The casing has a water cavity inside, and the end of the casing has a water inlet connected to a water inlet pipe, as well as at least two water outlets connected to the water cavity.

[0009] The heating tube includes a tube body connected to a sleeve, and a heating chamber disposed within the tube body, the heating chamber being connected to a water inlet and a water chamber.

[0010] The inner wall of the heating tube is used to heat the water in the heating chamber to generate steam, and the outer wall of the heating tube is used to heat the steam in the water chamber. The heating tube causes the pressure in the water chamber to reach a threshold range within a certain time.

[0011] The water outlet pipe is connected to the water outlet and is set at an angle. The water outlet pipe is used to discharge steam and generate a rotational torque to make the casing rotate.

[0012] In a further embodiment, the tube body is made of a metal-ceramic heating element material, a heating wire material, or a ceramic heating element material.

[0013] In a further embodiment, at least two of the water outlet pipes are arranged symmetrically around the central axis of the casing.

[0014] or, At least two of the aforementioned water outlet pipes are arranged asymmetrically.

[0015] In a further embodiment, the cleaning device also includes a fixed bracket connected to the inner wall of the housing.

[0016] The fixing bracket is also connected to the middle of the outer wall of the heating tube, or to the end of the outer wall of the heating tube away from the water inlet of the casing, which can fix the heating tube and avoid problems such as damage caused by the heating tube swinging due to being in a cantilever state.

[0017] In a further embodiment, the cleaning device also includes a shower head connected to a water outlet pipe.

[0018] The shower head is provided with several spray holes at its end, which are connected to the water outlet. This enables a larger spray coverage area under the same water output, increases the diffusion range of high-temperature steam in the dishwasher, and achieves uniform large-area spraying.

[0019] In a further embodiment, the casing is fixedly connected to the water inlet pipe.

[0020] In a further embodiment, the central axis of the water outlet pipe is parallel to the central axis of the housing. The uniform, wide-area spraying achieved by the shower head eliminates the need for rotating the spraying device, and also eliminates the need for rotating connections and the need for the water outlet pipe to be angled to achieve housing rotation. This further simplifies the structure and facilitates assembly.

[0021] In a further embodiment, the heating tube is a cylindrical structure.

[0022] or, The heating tube is a tubular structure with a T-shaped cross-section. When the heating tube is a tubular structure with a T-shaped cross-section, it can increase the temperature and pressure of the high-temperature steam.

[0023] In a further embodiment, the casing includes at least two housings and a connector connected to the two housings; At least two of the said shells enclose a water cavity, and by making the shells separate, a heating tube with a T-shaped cross-section can be installed inside the shell.

[0024] The beneficial effects of this invention are as follows: First, compared with the spray device of a traditional dishwasher, the use of high-pressure steam to drive the rotation of the casing eliminates the need for a water pump and its associated AC motor, thereby reducing power consumption, noise, and vibration. It also eliminates the need for oil-sealing the motor to prevent water leakage, simplifying the device structure and saving costs. Furthermore, it solves the problems of reduced washing efficiency, increased water and power consumption, and limited safety and stability caused by motor limitations in existing technologies, thus improving washing efficiency, reducing water and power consumption, and enhancing safety and stability.

[0025] II. Heating tubes made of metal-ceramic heating elements, heating wires, or ceramic heating elements can all achieve the effect of heating liquids to bring the pressure inside the water cavity to a threshold range within a certain time. However, compared with PTC ceramic heating elements, heating tubes using MCH metal-ceramic heating elements save 20-30% of electrical energy while achieving the same heating effect. At the same time, compared with PTC ceramic heating elements which only reach a maximum temperature of 300°C, heating tubes using MCH metal-ceramic heating elements can reach a heating temperature of over 700°C, which can rapidly heat up to generate high-temperature and high-pressure steam.

[0026] Third, in the embodiments using heating tubes made of MCH metal ceramic heating element material, compared with heating tubes made of heating wire and PTC ceramic heating element material, the surface is safe and non-conductive, with good insulation performance, eliminating the need for insulation treatment, avoiding the influence of thermal resistance material in the insulation layer, and further improving thermal efficiency. Attached Figure Description

[0027] Figure 1 This is a front cross-sectional view of the present invention.

[0028] Figure 2 This is a top sectional view of the present invention.

[0029] Figure 3 This is a schematic diagram of the heating tube structure of the present invention.

[0030] Figure 4 This is a front cross-sectional view of the cleaning device in an embodiment of the present invention with a shower head.

[0031] Figure 5 This is the present invention. Figure 4 A schematic diagram of the surface of the shower head in section A.

[0032] Figure 6 This is a front cross-sectional view of the cleaning device in an embodiment of the present invention where the heating tube has a T-shaped cross-section.

[0033] The attached figures are labeled as follows: 1. Inlet, 2. Outlet electrode, 3. Water cavity, 4. Housing, 5. Heating tube, 6. Fixing bracket, 7. Outlet pipe, 8. Metal slurry, 9. Ceramic substrate, 10. Shower head, 11. Left housing, 12. Right housing, 13. Connector, 14. Detailed Implementation

[0034] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid obscuring the invention.

[0035] This application discloses a high-temperature steam spray cleaning device for a dishwasher, which can solve the problems of reduced washing efficiency, increased water and electricity consumption, and limited safety and stability caused by the limitations of motors and electric heating devices in the prior art.

[0036] In the first embodiment, The cleaning device is connected to the dishwasher's water inlet pipe, such as... Figure 1 It includes: a casing 4, a heating element 5, and a water outlet pipe 8.

[0037] The housing 4 is rotatably connected to the inlet pipe. This rotatable connection can be achieved by using a sleeve technology to fit the housing 4 onto the end of the inlet pipe, such as... Figure 1 As shown, the housing 4 has a water cavity 3 inside, and the end of the housing 4 has a water inlet 1 connected to the water inlet pipe, and the other end has at least two water outlets 7 connected to the water cavity 3. The housing 4 can be made of stainless steel, cast iron, copper, or other materials.

[0038] like Figure 1 The heating tube 5 shown is disposed inside the casing 4. The heating tube 5 includes a tube body connected to the casing and a heating chamber disposed inside the tube body. The heating chamber is connected to the water inlet 1 and the water chamber 3. The tube body is made of MCH metal ceramic heating element material. The inner wall of the heating tube 5 is used to heat the water in the heating chamber to generate steam, and the outer wall of the heating tube 5 is used to heat the steam in the water chamber 3.

[0039] Water outlet pipe 8 is connected to water outlet 7. Water outlet pipe 8 is set at an angle and is used to discharge steam and generate a rotational torque to make the casing 4 rotate. Figure 2 As shown in the top view, there are four water outlet pipes 8. The water outlet pipes 8 are distributed at both ends in pairs. One set of water outlet pipes 8 is set downwards, and the other set of water outlet pipes 8 is set upwards. When steam is ejected from the water outlet pipes 8, the casing 4 can rotate clockwise.

[0040] In this embodiment, the tube body is made of heating materials such as MCH metal ceramic heating element material, heating wire material, or PTC ceramic heating element material.

[0041] In embodiments where the tube body is made of MCH metal-ceramic heating element material, such as Figure 3 The heating tube 5 shown comprises an alumina ceramic substrate 10 with a purity of 95% or higher, and a metal paste 9 printed on the alumina ceramic substrate 10, such as... Figure 3 The metal paste 9 shown is spirally arranged along the extension direction of the ceramic substrate 10. The metal paste 9 and the ceramic substrate 10 are integrally sintered. The metal paste 9 is connected to the lead-out electrode 2 on the outer side, such as... Figure 1 , 4 As shown in Figure 6, a casing 4 and / or a tube are spaced between the lead-out electrode 2 and the water cavity 3 to prevent leakage. The heating tube 5, made of MCH metal-ceramic heating element, is the core component of this high-temperature steam spray device. The internal metal slurry 9 is rapidly heated after the lead-out electrode 2 is connected to the power supply. The ceramic substrate 10, as an insulating and highly thermally conductive material, conducts the high temperature of the metal slurry 9 to the water in the water cavity 3, causing the water to be rapidly heated into high-temperature steam. The steam expands in volume to form high-temperature and high-pressure steam, which is then sprayed out from the water outlet pipe 8.

[0042] In the first embodiment, using heating materials such as metal-ceramic heating elements, heating wires, or ceramic heating elements can achieve the effect of heating the liquid so that the pressure inside the water cavity reaches a threshold range within a certain time. However, compared with heating wires and PTC ceramic heating elements, the embodiment using MCH metal-ceramic heating elements has the following advantages: heating wires require insulation protection, surface-charged PTCs will short-circuit and burn out if their surface comes into direct contact with water, and insulated PTCs use a polyimide insulating layer, which is a thermally resistive material and not conducive to heat exchange, thus increasing energy consumption and reducing thermal efficiency. Therefore, heating tubes using metal-ceramic heating elements can save 20-30% of energy while achieving the same heating effect. At the same time, compared with PTC ceramic heating elements which only reach a maximum temperature of 300°C, MCH metal-ceramic heating tubes can reach a heating temperature of over 700°C, which can rapidly heat up to generate high-temperature and high-pressure steam.

[0043] In embodiments using MCH metal-ceramic heating element heating tubes, compared to heating wires and PTC ceramic heating element heating tubes, the surface is safe and non-conductive, with good insulation performance, eliminating the need for insulation treatment, avoiding the influence of thermal resistance materials in the insulation layer, and further improving thermal efficiency.

[0044] In a further embodiment of the first embodiment, at least two water outlet pipes 8 are arranged symmetrically around the central axis of the casing 4, such as... Figure 2 The four water outlet pipes 8 shown are arranged in pairs, with the two pairs of water outlet pipes 8 arranged symmetrically at the center.

[0045] or, At least two water outlet pipes are asymmetrically arranged.

[0046] In a further embodiment of the first embodiment, such as Figure 1 , 4 The cleaning device shown in Figure 6 also includes a fixed bracket 6 connected to the inner wall of the housing 4.

[0047] The fixing bracket 6 is also connected to the middle of the outer wall of the heating tube 5, or to the end of the outer wall of the heating tube 5 away from the water inlet 1 of the casing 4.

[0048] Work process: The dishwasher is equipped with a one-way valve on the water inlet pipe that is connected to the water inlet 1 of the housing 4. The water in the water inlet pipe passes through the one-way valve, the water inlet 1 of the housing 4, the heating chamber of the heating tube 5, the water chamber 3 of the housing 4, and the water outlet 7 of the housing 4 in sequence before being sprayed out from the water outlet pipe 8.

[0049] Compared with existing resistance wire heating and PTC heating, the heating tube made of metal ceramic heating element can heat a predetermined amount of water into steam in a shorter time, causing the pressure in water chamber 3 to rise rapidly. That is, the inner wall of heating tube 5 heats the water in the heating chamber for the first time, turning the predetermined amount of water in the heating chamber into steam, and the outer wall of heating tube 5 heats the steam in water chamber 3 for the second time. The first heating can heat the water in heating tube 5 into steam and quickly fill the water chamber. The second heating can make the pressure in water chamber 3 quickly reach the threshold range within a certain time. This threshold range is between 0.01013 MPa and 1.55366 MPa. That is, the pressure in water chamber 3 is greater than 0.1 atmospheres of water pump head and less than the saturation pressure corresponding to steam at 200°C.

[0050] A water pipe connected to inlet 1, equipped with a one-way valve, prevents the backflow of high-temperature steam. Water flows from the inner wall of heating pipe 5 into water chamber 3, where it is heated simultaneously by both the inner and outer walls of heating pipe 5. Electrode 2, extending from heating pipe 5, is connected to a DC power supply, causing the internal metal slurry 9 to heat up rapidly. The heat is conducted through ceramic substrate 10 to the water in water chamber 3, rapidly heating the water to over 100°C, thus forming high-temperature steam. This steam can be further heated, causing the water to change from a liquid to a gaseous state, expanding in volume to form high-temperature, high-pressure steam, which is then ejected from outlet pipe 8. Figure 1 As shown, one side of the water outlet pipe 8 is angled outwards from the screen, while the other side is angled inwards from the screen. This generates rotational torque, causing the stainless steel casing 4 to rotate continuously, thus achieving a wide-angle spraying effect. Furthermore, the high-temperature, high-pressure steam sprayed also increases the spraying range.

[0051] Working Principle: The heating element 5, made of metal-ceramic heating element, can reach a temperature above 200℃ in 10 seconds and above 600℃ within 20 seconds. Therefore, it can rapidly generate high-temperature, high-pressure saturated steam, eliminating the need for a spray pump to provide spray water pressure. Water in the water chamber 3 is heated to above 100℃ in a very short time by the highly thermally conductive ceramic. Due to volume expansion, high-pressure steam is generated inside the water chamber 3. This high-temperature, high-pressure steam is rapidly ejected from the outlet 7. The high-pressure steam generates rotational torque on the stainless steel casing 4 through the asymmetrical orientation of the outlet pipe 8, causing the stainless steel casing 4 to rotate. The heating element 5 can reach above 200℃ in 10 seconds when started at its rated power, and above 600℃ in 20 seconds when started at 500W power. The heating temperature can reach above 700℃, and it can be dry-burned at 700℃. The saturation pressure corresponding to 200℃ steam is 1.55366 MPa, compared to atmospheric pressure of 0.1013 MPa. The pump generates a 1-meter water column with a head of 0.1 atmospheres. Thus, the water in water chamber 3 will rapidly heat up when the MCH heating tube 5 is working, forming high-temperature and high-pressure steam that is sufficient to replace the water pump and be sprayed out from the outlet pipe 8. At the same time, the pressure on the water pipe drives the sprayer to rotate, and the generated high-temperature and high-pressure steam will diffuse, further increasing the spray area and achieving a uniform and dead-angle-free spraying effect. It can efficiently wash and sterilize without a water pump, saving water and electricity while providing better cleaning and disinfection effects.

[0052] In the second embodiment, like Figure 4 As shown in the first embodiment, the cleaning device also includes a shower head 11 connected to the water outlet pipe 8.

[0053] like Figure 5 The shower head 11 shown has several spray holes at its end, and the spray holes are connected to the water outlet 7.

[0054] The shower head 11 enables a larger spray coverage area with the same water output, increases the diffusion range of high-temperature steam in the dishwasher, and achieves uniform large-area spraying.

[0055] In a further embodiment of the second embodiment, the cleaning device may retain the rotatable connection between the housing 4 and the water pipe, as well as the setting direction of the water outlet pipe 8, or the housing 4 may be fixedly connected to the water inlet pipe, and / or the central axis of the water outlet pipe 8 may be parallel to the central axis of the housing 4.

[0056] The use of the shower head 11 to achieve uniform, wide-area spraying eliminates the need for rotating the spraying device, as well as the need for rotating connections and the need for the outlet 7 to be angled to allow the housing 4 to rotate, further simplifying the structure and making assembly easier.

[0057] In the third embodiment, Based on the first embodiment, the heating tube 5 has a cylindrical structure.

[0058] Or such as Figure 6 The heating tube 5 shown is a tubular structure with a T-shaped cross-section.

[0059] When the heating tube 5 is a tubular structure with a T-shaped cross-section, the increased heating contact area between the water and the heating tube 5 can increase the temperature and pressure of the high-temperature steam.

[0060] After replacing the cylindrical heating tube 5 in the first embodiment with a T-shaped cross-section tubular heating tube 5, the water is heated not only by the vertical inner and outer walls of the T-shaped cross-section tubular heating tube 5, but also by the horizontal inner and outer walls of the T-shaped cross-section tubular heating tube 5. This results in continuous heating within the casing 4, increasing the temperature and pressure of the high-temperature steam. The water enters the T-shaped cross-section tubular heating tube 5 from the inlet 1 and exits from both ends of the T-shaped cross-section tubular heating tube 5. Simultaneously, it is heated by the outer wall of the heating tube 5, and the resulting high-temperature, high-pressure steam is ejected from the outlet 7. The high-pressure steam drives the spraying device to rotate.

[0061] This embodiment can also be combined with the second embodiment to obtain a cleaning device with higher heating efficiency and using the shower head 11.

[0062] In a further embodiment of the third embodiment, the housing 4 includes at least two housings and a connector 14 connected to the two housings.

[0063] At least two shells enclose a water cavity 3.

[0064] like Figure 6 The casing 4 shown includes a left casing 12, a right casing 13 and a connector 14. The left casing 12 and the right casing 13 are symmetrically arranged and are arranged opposite each other to form a water cavity 3 during assembly. The connector 14 can be a screw, a plug-in or a hose clamp to connect the left casing 12 and the right casing 13 together.

[0065] The housing 4 may also include an upper housing with an inlet 1, a bottom plate with an outlet 7, and a connector 14. The bottom end of the upper housing is an open end, and the shape of the bottom plate matches the open end of the upper housing. When the upper housing and the bottom plate are assembled, they are arranged opposite each other to form a water cavity 3. The connector 14 may be a screw, which passes through the bottom plate and is screwed to the upper housing to connect the upper housing and the bottom plate together.

[0066] By making the housing 4 a separate unit, the heating tube 5 with a T-shaped cross-section can be easily installed inside the housing 4.

[0067] As described above, although the invention has been shown and described with reference to specific preferred embodiments, it should not be construed as limiting the invention itself. Various changes in form and detail may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A high-temperature steam spray cleaning device for a dishwasher, which is connected to the water inlet pipe of the dishwasher; Its features are, include: A housing rotatably connected to the inlet pipe, a heating pipe installed inside the housing, and an outlet pipe connected to the housing; The casing has a water cavity inside, and one end of the casing has a water inlet connected to a water inlet pipe, while the other end has at least two water outlets connected to the water cavity. The heating tube includes a tube body connected to a sleeve, and a heating chamber disposed within the tube body, the heating chamber being connected to a water inlet and a water chamber; The inner wall of the heating tube is used to heat the water in the heating chamber to generate steam, and the outer wall of the heating tube is used to heat the steam in the water chamber. The heating tube causes the pressure in the water chamber to reach a threshold range within a certain time. The water outlet pipe is connected to the water outlet, and the water outlet pipe is set at an angle. The water outlet pipe is used to discharge steam and generate a rotational torque to make the casing rotate. The tube body is made of MCH metal-ceramic heating element material.

2. The high-temperature steam spray cleaning device for a dishwasher according to claim 1, characterized in that, At least two of the aforementioned water outlet pipes are symmetrically arranged around the central axis of the casing; or, At least two of the aforementioned water outlet pipes are arranged asymmetrically.

3. The high-temperature steam spray cleaning device for a dishwasher according to claim 1, characterized in that, It also includes a fixed bracket connected to the inner wall of the casing; The fixing bracket is also connected to the middle of the outer wall of the heating tube. Alternatively, it can be connected to the end of the heating tube's outer wall away from the water inlet of the casing.

4. The high-temperature steam spray cleaning device for a dishwasher according to claim 1, characterized in that, It also includes the shower head that connects to the water outlet pipe; The shower head has several spray holes at its end, and the spray holes are connected to the water outlet.

5. The high-temperature steam spray cleaning device for a dishwasher according to claim 4, characterized in that, The casing is fixedly connected to the water inlet pipe.

6. A high-temperature steam spray cleaning device for a dishwasher according to claim 4 or 5, characterized in that, The central axis of the water outlet pipe is parallel to the central axis of the casing.

7. A high-temperature steam spray cleaning device for a dishwasher according to claim 1 or 3, characterized in that, The heating element has a cylindrical structure; or, The heating element is a tubular structure with a T-shaped cross-section.

8. The high-temperature steam spray cleaning device for a dishwasher according to claim 7, characterized in that, The casing includes at least two housings and a connector that connects the two housings; At least two of the shells together form a water cavity.

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