Dry burning prevention device, heating cylinder assembly and heat pump air conditioner

Abstract

The utility model discloses an anti-dry-burning device, a heating cylinder assembly and a heat pump air conditioner. The anti-dry-burning device comprises a mounting pipe body; the piston body is slidably sealed in the mounting pipe body so as to divide the mounting pipe body into a first cavity and a second cavity, and the first cavity is used for being communicated with a water path of to-be-protected equipment; the conductor triggering piece is arranged in the second cavity and is connected with the piston body; the reset elastic part is arranged in the second cavity, and the piston body slides in the mounting pipe body under the action of water pressure in the reset elastic part and the first cavity; and a first wire harness, a second wire harness and a normally-connected wire harness, the trigger end of the normally-connected wire harness is electrically connected with the conductor trigger piece, and the trigger ends of the first wire harness and the second wire harness are respectively arranged at different positions of the moving path of the conductor trigger piece. The output power of the electric heating device can be controlled according to the signal output by the anti-dry-burning device, so that potential safety hazards caused by the fact that the heating barrel is heated to the ignition temperature of the heat preservation layer are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat pump air conditioners, and more particularly to a dry burning prevention device, a heating cylinder assembly and a heat pump air conditioner. BACKGROUND

[0002] With the development of air conditioning technology, heat pump air conditioners are applied in more and more scenarios, and the requirement for outlet water temperature is getting higher and higher. The ordinary outlet water temperature is basically around 50 degrees Celsius. In order to achieve a higher outlet water temperature, an electric heating device is usually added in the heating cylinder.

[0003] As shown in Figure 1 An electric heating device 200 is arranged in the cavity of the heating cylinder 100, and the electric heating device 200 is used to heat the water flowing through the heating cylinder 100. The heating cylinder 100 has a water inlet 101 and a water outlet 102. The water enters the cavity of the heating cylinder 100 through the water inlet 101, and is heated and warmed by the electric heating device 200, and then flows out through the water outlet 102. In the prior art, the electric heating device 200 is generally an electric heating pipe. The heat output of the electric heating pipe is related to the watt density. The higher the watt density, the greater the heat output, and the higher the water temperature. The lower the watt density, the lower the water temperature. In order to ensure the heating effect, an electric heating pipe with high watt density is generally selected to quickly heat the water to a high temperature. In order to realize the heat preservation of the heating cylinder 100, a heat preservation layer 300 is arranged outside the heating cylinder 100.

[0004] Due to unstable water flow, when the water flow is small, the water entering the heating cylinder 100 cannot take away the heat of the electric heating device 200, resulting in a high temperature of the heating cylinder 100. If the temperature reaches the ignition point of the heat preservation layer 300, the heat preservation layer 300 will smoke or even catch fire, causing a safety hazard.

[0005] Therefore, how to avoid the safety hazard caused by the heating cylinder being warmed up to the ignition point of the heat preservation layer is a problem to be solved by those skilled in the art. CONTENT OF THE INVENTION

[0006] Therefore, how to avoid the safety hazard caused by the heating cylinder being warmed up to the ignition point of the heat preservation layer is a problem to be solved by those skilled in the art.

[0007] Another object of the present application is to provide a heating cylinder assembly and a heat pump air conditioner having the above dry burning prevention device.

[0008] To achieve the above object, the present application provides the following technical scheme:

[0009] The first aspect of the present application provides a dry burning prevention device, comprising:

[0010] A mounting pipe body;

[0011] a piston body slidingly sealed in the mounting pipe body to divide the mounting pipe body into a first cavity and a second cavity, the first cavity being used to communicate with a water channel of an equipment to be protected;

[0012] a conductor trigger arranged in the second cavity and connected with the piston body;

[0013] a reset elastic member arranged in the second cavity, the piston body sliding in the mounting pipe body under the action of the reset elastic member and water pressure in the first cavity;

[0014] a first wire harness, a second wire harness and a constant wire harness, a trigger end of the constant wire harness being electrically connected with the conductor trigger, trigger ends of the first wire harness and the second wire harness being arranged in the second cavity and arranged at different positions of a moving path of the conductor trigger respectively.

[0015] In a possible implementation, the mounting pipe body is provided with a support, one end of the reset elastic member being supported on the support and the other end abutting against the conductor trigger or the piston body;

[0016] The trigger ends of the first wire harness and the second wire harness are both supported on the support by a wire harness reset member.

[0017] In a possible implementation, the conductor trigger is fixed on a surface of the piston body facing the second cavity;

[0018] Alternatively,

[0019] The conductor trigger is arranged spaced apart from the piston body and fixed on the piston body by a connecting rod.

[0020] In a possible implementation, the trigger ends of the first wire harness and the second wire harness are both fixed on a side wall of the mounting pipe body;

[0021] The conductor trigger is arranged on a side wall of the piston body or connected to a side of the piston body facing the second cavity.

[0022] In a possible implementation, a first embedding groove and a second embedding groove are arranged on the side wall of the mounting pipe body at different axial positions respectively;

[0023] The trigger end of the first wire harness is embedded in the first embedding groove by a first elastic member, and the trigger end of the first wire harness is exposed outside the first embedding groove when the first elastic member is in a natural state;

[0024] The trigger end of the second wire harness is embedded in the second embedding groove through a second elastic member, and when the second elastic member is in a natural state, the trigger end of the second wire harness is exposed outside the second embedding groove.

[0025] In a possible implementation, a side surface of the piston body facing the first cavity is a plane perpendicular to an axis of the mounting pipe body;

[0026] Alternatively,

[0027] The side surface of the piston body facing the first cavity is an obtuse angle with the axis of the mounting pipe body, and a slope facing a water inlet direction.

[0028] In a possible implementation, the mounting pipe body is provided with a first limiting part at one end of the first cavity to prevent the piston body from being separated from the mounting pipe body.

[0029] The dry-burning prevention device provided in the application can be installed on a water channel of an equipment to be protected when in use, so that the first cavity of the mounting pipe body is in communication with the water channel and has the same water pressure as the water channel. When the pressure in the first cavity is greater than the elastic force of the reset elastic member, the piston body moves towards the reset elastic member. When the pressure in the first cavity decreases, the reset elastic member resets and pushes the piston body to reset. With the change of the pressure in the first cavity, the position of the piston body in the mounting pipe body changes, so that the conductor trigger is connected to the trigger end of the first wire harness, the trigger end of the second wire harness, or disconnected from the trigger ends of the first wire harness and the second wire harness, that is, the first wire harness, the second wire harness and the always-connected wire harness can output the position signal of the piston body, so that the dry-burning prevention device can output the water pressure of the water channel of the equipment to be protected, so that the output power of the electric heating device of the equipment to be protected can be controlled according to the signal output by the dry-burning prevention device, to avoid the safety hazard caused by the heating cylinder and other equipment to be protected being heated to the ignition point of the heat preservation layer.

[0030] The second aspect of the application provides a heating cylinder assembly, comprising a heating cylinder, an electric heating device being arranged in the heating cylinder, and further comprising:

[0031] A dry-burning prevention device is arranged on a water channel of the heating cylinder, and the dry-burning prevention device is the dry-burning prevention device as any one of the above, wherein the equipment to be protected is the heating cylinder.

[0032] An electric control board is provided with a controller and wiring terminals, the wiring terminals of the first wiring harness, the second wiring harness and the always-on wiring harness are connected to the corresponding wiring terminals of the electric control board respectively, when the always-on wiring harness is connected to the second wiring harness and disconnected from the first wiring harness, the controller outputs a first control signal, when the always-on wiring harness is connected to the first wiring harness, the controller outputs a second control signal, when the always-on wiring harness is disconnected from the first wiring harness and the second wiring harness, the controller outputs a third control signal, the first control signal is to control the electric heating device to output a first heating power, the second control signal is to control the electric heating device to output a second heating power, and the third control signal is to control the electric heating device to be powered off, and the first heating power is less than the second heating power.

[0033] In a possible implementation, the heating cylinder body comprises a circulating water port, and the dry-burning prevention device is arranged on the circulating water port of the heating cylinder body.

[0034] A mounting hole in communication with the circulating water port is formed in the side wall of the circulating water port, and the mounting pipe body is sealingly communicated with the mounting hole.

[0035] One end of the mounting pipe body extends into the lumen of the circulating water port from the mounting hole, or the end of the mounting pipe body matched with the mounting hole is sunk into the mounting hole, and the circulating water port for mounting the dry-burning prevention device is the water inlet and / or the water outlet of the heating cylinder body.

[0036] The heating cylinder body assembly provided in the application has all the technical effects of the dry-burning prevention device, which will not be described herein again.

[0037] The third aspect of the application provides a heat pump air conditioner comprising the heating cylinder body assembly as described above.

[0038] The heat pump air conditioner provided in the application has all the technical effects of the heating cylinder body assembly, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0040] Figure 1 is a sectional view of the heating cylinder body assembly in the prior art;

[0041] Figure 2 A sectional view of the heating cylinder assembly disclosed in the embodiment of the present application;

[0042] Figure 3 A sectional view of the dry-burning prevention device disclosed in the first embodiment of the present application;

[0043] Figure 4 A sectional view of the dry-burning prevention device disclosed in the second embodiment of the present application;

[0044] Figure 5 A sectional view of the dry-burning prevention device disclosed in the third embodiment of the present application;

[0045] Figure 6 A sectional view of the dry-burning prevention device disclosed in the fourth embodiment of the present application;

[0046] Figure 7 A sectional view of the dry-burning prevention device disclosed in the fifth embodiment of the present application;

[0047] Figure 8 A structural schematic diagram of the electric control board disclosed in the embodiment of the present application.

[0048] The meanings of the various reference numerals in the drawings are as follows:

[0049] 100 - heating cylinder; 101 - water inlet; 1011 - pipe body limiting part; 102 - water outlet; 103 - air release valve;

[0050] 200 - electric heating device;

[0051] 300 - heat preservation layer;

[0052] 400 - dry-burning prevention device; 401 - mounting pipe body; 4011 - support; 4012 - first limiting part; 402 - piston body; 403 - reset elastic member; 404 - always-connected wiring harness; 405 - first wiring harness; 406 - second wiring harness; 407 - conductor trigger; 408 - connecting rod;

[0053] 500 - electric control board; 501 - controller; 502 - wiring terminal. DETAILED DESCRIPTION

[0054] The core of the present application is to provide a dry-burning prevention device to improve calibration efficiency and reduce manufacturing cost.

[0055] Another core of the present application is to provide a heating cylinder assembly and heat pump air conditioner with the above dry-burning prevention device.

[0056] Hereinafter, the embodiments will be described with reference to the accompanying drawings. In addition, the embodiments shown below do not limit the application content recited in the claims in any way. Furthermore, the entire content of the configuration represented in the following embodiments is not limited to what is necessary for the solution of the application recited in the claims. Note that, for the convenience of description, only the portions related to the application are shown in the drawings. The embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0057] As shown in Figures 2-7 , the dry-burning prevention device disclosed in the embodiments of the present application is arranged on the water path of the equipment to be protected. The equipment to be protected is not limited to the heating cylinder 100 of the heat pump air conditioner, and any equipment with an electrically heated water path can be protected by the dry-burning prevention device disclosed in the embodiments.

[0058] As shown in Figure 3 , the dry-burning prevention device can include a mounting pipe body 401, a piston body 402, a conductor trigger 407, a reset elastic member 403, a first wire harness 405, a second wire harness 406, and a normally-on wire harness 404.

[0059] The mounting pipe body 401 is the supporting base of the dry-burning prevention device, which is used to provide a mounting base for other components. The mounting pipe body 401 is used to be in sealing communication with the water path of the equipment to be protected. It should be noted that the water path of the equipment to be protected can be provided with a mounting hole for mounting the mounting pipe body 401. The mounting hole can be a threaded hole, and the mounting pipe body 401 can be provided with external threads, which is mounted on the water path of the equipment to be protected by threaded cooperation, so that the sealing is easy to realize. The sealing method is not limited to the method of applying sealant, setting a sealing ring or a gasket between the mounting pipe body 401 and the mounting hole.

[0060] The end of the mounting pipe body 401 can extend into the interior of the water path of the equipment to be protected, as shown in Figure 3 , Figure 4 , Figure 6 and Figure 7 . The end of the mounting pipe body 401 can also not extend into the interior of the water path of the equipment to be protected, as shown in Figure 5 . When the end of the mounting pipe body 401 does not extend into the interior of the water path of the equipment to be protected, a pipe body limiting portion 1011 can be provided on the inner wall of the water path to limit the installation depth of the mounting pipe body 401. In this way, a sealing ring can be provided at the pipe body limiting portion 1011 to seal the connection position of the mounting pipe body 401 and the water path of the equipment to be protected.

[0061] It should be noted that the mounting pipe body 401 can also be designed as an integral structure with the water path of the equipment to be protected.

[0062] The piston body 402 is slidingly sealed in the mounting pipe body 401 to divide the mounting pipe body 401 into a first cavity and a second cavity, the first cavity is the side facing the waterway of the equipment to be protected, and is used to communicate with the waterway of the equipment to be protected. When the piston body 402 slides in the mounting pipe body 401, it does not act on the seal of the mounting pipe body 401, that is, it ensures that the water in the first cavity will not enter the second cavity. The piston body 402 is acted on by the pressure of the first cavity and slides to the side of the second cavity. The greater the water pressure in the first cavity, the greater the distance that the piston body 402 moves to the second cavity; on the contrary, the smaller the water pressure in the first cavity, the smaller the distance that the piston body 402 moves to the second cavity. The water pressure in the first cavity is affected by the water flow of the waterway of the equipment to be protected. The greater the water flow, the greater the water pressure; on the contrary, the smaller the water pressure, so the position of the piston body 402 in the mounting pipe body 401 can reflect the size of the water flow of the waterway of the equipment to be protected.

[0063] The conductor trigger 407 is arranged in the second cavity and is connected with the piston body 402. The conductor trigger 407 is made of a conductor material, and is arranged in the second cavity to prevent short circuit caused by contact with water. The piston body 402 should be made of an insulating material due to contact with water. When the piston body 402 moves, the conductor trigger 407 is driven to move.

[0064] The reset elastic member 403 is arranged in the second cavity, and the piston body 402 slides in the mounting pipe body 401 under the action of the reset elastic member 403 and the water pressure in the first cavity. That is, the piston body 402 can be driven to move to the side of the first cavity under the action of the reset elastic member 403, and can be driven to move to the side of the second cavity under the action of the water pressure in the first cavity. The main function of the reset elastic member 403 is to push the piston body 402 to move to the direction of the first cavity when the water pressure in the first cavity decreases.

[0065] The trigger end of the always-on wiring harness 404 is electrically connected with the conductor trigger 407, that is, the trigger end of the always-on wiring harness 404 is directly fixed on the conductor trigger 407 and is not affected by the movement of the conductor trigger 407, and always maintains electrical connection with the conductor trigger 407.

[0066] The trigger ends of the first wire harness 405 and the second wire harness 406 are arranged in the second cavity and are arranged at different positions of the moving path of the conductor trigger 407. For example, the trigger end of the first wire harness 405 is farther from the conductor trigger 407 than the trigger end of the second wire harness 406, so that after the pressure in the first cavity increases, the conductor trigger 407 can move to contact and connect with the trigger end of the second wire harness 406, thereby realizing the connection between the always-connected wire harness 404 and the second wire harness 406. When not connected with the first wire harness 405, the conductor trigger 407 can move to contact and connect with the trigger end of the first wire harness 405 when the pressure in the first cavity continues to increase, thereby realizing the connection between the always-connected wire harness 404 and the first wire harness 405. It should be noted that when the conductor trigger 407 contacts the trigger end of the first wire harness 405, the conductor trigger 407 can remain in contact with the trigger end of the second wire harness 406 or can be disconnected from the trigger end of the second wire harness 406.

[0067] According to the pressure of the first cavity, the positions of the piston body 402 and the conductor trigger 407 in the installation pipe body 401 are different, and according to different functions, the following three positions are provided:

[0068] When the conductor trigger 407 is in the first position, the conductor trigger 407 contacts the trigger end of the first wire harness 405, and at this time, the water flow of the water path of the equipment to be protected is the largest;

[0069] When the conductor trigger 407 is in the second position, the conductor trigger 407 moves to the first cavity and is disconnected from the trigger end of the first wire harness 405 and contacts the trigger end of the second wire harness 406, and at this time, the water flow of the water path of the equipment to be protected is moderate;

[0070] When the conductor trigger 407 is in the third position, the conductor trigger 407 continues to move to the first cavity, and the conductor trigger 407 is disconnected from the trigger end of the second wire harness 406, and at this time, the water flow of the water path of the equipment to be protected is small.

[0071] The first wire harness 405, the second wire harness 406 and the always-connected wire harness 404 can output the above position information, so that the heating power of the electric heating device 200 can be controlled according to the water flow of the water path of the equipment to be protected.

[0072] In summary, the dry-burning prevention device disclosed in the embodiments of the present application can be installed on the water path of the equipment to be protected when in use, so that the first cavity of the installation pipe body 401 is in communication with the water path and has the same water pressure as the water path. When the pressure in the first cavity is greater than the elastic force of the reset elastic member 403, the piston body 402 moves to the reset elastic member 403, and when the pressure in the first cavity decreases, the reset elastic member 403 resets and pushes the piston body 402 to reset.

[0073] With the pressure in the first cavity being different, the position of the piston body 402 in the mounting tube body 401 changes, which can make the conductor trigger 407 connected with the trigger end of the first wire harness 405, connected with the trigger end of the second wire harness 406, or disconnected with the trigger ends of the first wire harness 405 and the second wire harness 406, that is, the first wire harness 405, the second wire harness 406 and the always-on wire harness 404 can output the position signal of the piston body 402, so that the water pressure in the water passage of the equipment to be protected can be output by the anti-dry burning device, and the output power of the electric heating device of the equipment to be protected can be controlled according to the signal output by the anti-dry burning device, so as to avoid the safety hazard caused by the heating cylinder of the equipment to be protected being heated to the ignition point of the heat preservation layer.

[0074] As shown in Figures 3-7 , the mounting tube body 401 is provided with a support 4011, one end of the reset elastic member 403 is supported on the support 4011, and the other end abuts against the conductor trigger 407 or the piston body 402, so that the reset elastic member 403 can apply elastic force to the conductor trigger 407 and the piston body 402, so as to push the conductor trigger 407 and the piston body 402 to move in the direction of the first cavity when the pressure in the first cavity decreases.

[0075] The trigger ends of the first wire harness 405 and the second wire harness 406 are supported on the support 4011 by wire harness reset members. When the conductor trigger 407 contacts the trigger end of the second wire harness 406 and continues to move towards the trigger end of the first wire harness 405, the corresponding wire harness reset member of the second wire harness 406 can be compressed, so that the trigger end of the second wire harness 406 follows the conductor trigger 407 to move towards the trigger end of the first wire harness 405. Similarly, when the conductor trigger 407 contacts the trigger end of the first wire harness 405 and continues to move towards the support 4011, the corresponding wire harness reset member of the first wire harness 405 can be compressed, so that the trigger end of the first wire harness 405 follows the conductor trigger 407 to move.

[0076] When the conductor trigger 407 is pushed by the reset elastic member 403 to move in the direction of the first cavity, the corresponding wire harness reset members of the first wire harness 405 and the second wire harness 406 reset, so that the trigger ends of the first wire harness 405 and the second wire harness 406 reset to the set position.

[0077] In an embodiment of the present application, the conductor trigger 407 can be fixed on the surface of the piston body 402 facing the second cavity (as shown in Figure 3 and Figure 6 ). Figure 4 Figure 7 In an embodiment of the present application, the conductor trigger 407 can be fixed on the surface of the piston body 402 facing the second cavity (as shown in

[0078] ​In order to reduce the friction, the conductor trigger 407 can have a gap with the inner part of the installation pipe body 401, that is, the two are not in contact, preventing the problem of poor movement caused by friction when moving.

[0079] In another embodiment of the present application, the trigger ends of the first wire harness 405 and the second wire harness 406 can also be fixed to the side wall of the installation pipe body 401, and the conductor trigger 407 is arranged on the side wall of the piston body 402. The conductor trigger 407 can also be connected to the side of the piston body 402 facing the second cavity. In this embodiment, the side surface of the conductor trigger 407 is connected with the trigger ends of the first wire harness 405 and the second wire harness 406. It should be noted that the present application does not limit the position of the conductor trigger 407 in contact with the trigger end, as long as electrical connection can be achieved.

[0080] Further, the side wall of the installation pipe body 401 is provided with a first embedding groove and a second embedding groove at different positions in the axial direction. The trigger end of the first wire harness 405 is embedded in the first embedding groove through the first elastic member, and when the first elastic member is in a natural state, the trigger end of the first wire harness 405 is exposed outside the first embedding groove. It should be noted that the trigger end of the first wire harness 405 can be designed as a curved surface structure, and the two ends in the axial direction of the installation pipe body 401 can be located in the first embedding groove, and the middle part of the trigger end of the first wire harness 405 protrudes out of the first embedding groove, so as to prevent the conductor trigger 407 from being stuck by the end of the trigger end when moving, and also to achieve effective contact with the conductor trigger 407.

[0081] Similarly, the trigger end of the second wire harness 406 is embedded in the second embedding groove through the second elastic member, and when the second elastic member is in a natural state, the trigger end of the second wire harness 406 is exposed outside the second embedding groove. It should be noted that the trigger end of the second wire harness 406 can be designed as a curved surface structure, and the two ends in the axial direction of the installation pipe body 401 can be located in the second embedding groove, and the middle part of the trigger end of the second wire harness 406 protrudes out of the second embedding groove, so as to prevent the conductor trigger 407 from being stuck by the end of the trigger end when moving, and also to achieve effective contact with the conductor trigger 407.

[0082] In a specific embodiment of the present application, the side surface of the piston body 402 facing the first cavity is a plane perpendicular to the axis of the installation pipe body 401. As shown in FIG. 1, the water path of the protection device is arranged horizontally, and the installation pipe body 401 is arranged vertically, so that the side surface of the piston body 402 facing the first cavity is a horizontal plane. Figure 3

[0083] Of course, the side surface of the piston body 402 facing the first cavity is an obtuse angle with the axis of the installation pipe body 401, and the inclined surface facing the water inlet direction. As shown in FIG. 3, the water path of the protection device is arranged horizontally, and the installation pipe body 401 is arranged vertically, so that the side surface of the piston body 402 facing the first cavity is an inclined surface. Figure 6 ​As shown, the waterway of the device to be protected is horizontally arranged, and the pipe body 401 is vertically arranged as an example, and the side surface of the piston body 402 facing the first cavity is an inclined surface arranged obliquely with respect to the horizontal plane and the water quality plane. When the waterway of the device to be protected is filled with water, the water flow will impact on the inclined surface of the piston body 402, and the inclined surface will divide the impact force of the water flow into a horizontal direction and a vertical direction, and the vertical direction can push the piston body 402 to move in the direction of the second cavity. In this embodiment, the surface of the piston body 402 facing the first cavity is designed as an inclined surface, so that the piston body 402 is more sensitive to the size of the water flow (not only affected by the water pressure in the waterway, but also affected by the water flow), and more easily feels the change of the water flow.

[0084] In order to prevent the piston body 402 from being pushed away from the installation pipe body 401 by the reset elastic member 403, the installation pipe body 401 is provided with a first limiting portion 4012 (as shown in Figure 5 and Figure 7 as shown).

[0085] As shown in Figure 2 The heating cylinder assembly disclosed in the embodiment of the present application further comprises a dry-burning prevention device 400 and an electric control board 500. For ease of understanding, the embodiment takes the dry-burning prevention device 400 arranged on the water inlet 101 of the heating cylinder 100 as an example for introduction. It should be noted that the dry-burning prevention device 400 can also be arranged on the water outlet 102, and of course it can also be arranged on other waterways, such as the water inlet pipeline communicating with the water inlet 101 or the water outlet pipeline communicating with the water outlet 102. The dry-burning prevention device 400 arranged on the water inlet 101 or the water inlet pipeline can be powered off more quickly, and has better protection effect when the temperature rises faster.

[0086] The heating cylinder assembly disclosed in the embodiment of the present application further comprises a dry-burning prevention device 400 and an electric control board 500. For ease of understanding, the embodiment takes the dry-burning prevention device 400 arranged on the water inlet 101 of the heating cylinder 100 as an example for introduction. It should be noted that the dry-burning prevention device 400 can also be arranged on the water outlet 102, and of course it can also be arranged on other waterways, such as the water inlet pipeline communicating with the water inlet 101 or the water outlet pipeline communicating with the water outlet 102. The dry-burning prevention device 400 arranged on the water inlet 101 or the water inlet pipeline can be powered off more quickly, and has better protection effect when the temperature rises faster.

[0087] The dry-burning prevention device 400 is the dry-burning prevention device 400 disclosed in the above embodiment, wherein the device to be protected is the heating cylinder 100. The side wall of the water inlet 101 is provided with a mounting hole in communication with the water inlet 101, and the mounting pipe body 401 is sealingly assembled in the mounting hole. One end of the mounting pipe body 401 can extend into the lumen of the water inlet 101 from the mounting hole. Of course, the end of the mounting pipe body 401 matched with the mounting hole can also sink into the mounting hole, that is, the end of the mounting pipe body 401 is located in the mounting hole and does not extend into the lumen of the water inlet 101.

[0088] The heating cylinder assembly provided in the application has all the technical effects of the dry-burning prevention device 400 described above, and details are not repeated herein.

[0089] The controller 501 and the wiring terminals 502 are arranged on the electric control board 500, and the wiring terminals of the first wire harness 405, the second wire harness 406 and the always-on wire harness 404 are respectively connected to the corresponding wiring terminals 502 of the electric control board 500.

[0090] When the water inlet amount of the water inlet 101 of the heating cylinder 100 is moderate, the conductor trigger 407 is in the second position, the conductor trigger 407 moves towards the first cavity, is disconnected from the trigger end of the first wire harness 405, and is in contact with the trigger end of the second wire harness 406, so that the always-on wire harness 404 is connected with the second wire harness 406 and is disconnected from the first wire harness 405, and the controller 501 outputs the first control signal.

[0091] When the water inlet amount of the water inlet 101 of the heating cylinder 100 is large, the conductor trigger 407 is in the first position, the conductor trigger 407 is in contact with the trigger end of the first wire harness 405, so that the always-on wire harness 404 is connected with the first wire harness 405, and the controller 501 outputs the second control signal.

[0092] When the water inlet amount of the water inlet 101 of the heating cylinder 100 is small, the conductor trigger 407 is in the third position, the conductor trigger 407 is disconnected from the trigger end of the second wire harness 406, so that the always-on wire harness 404 is disconnected from the first wire harness 405 and the second wire harness 406, and the controller 501 outputs the third control signal.

[0093] The first control signal is to control the electric heating device 200 to output the first heating power, the second control signal is to control the electric heating device 200 to output the second heating power, the first heating power is less than the second heating power, and the third control signal is to control the electric heating device 200 to be powered off.

[0094] That is, when the water inflow of the water inlet 101 of the heating cylinder 100 is moderate, the electric heating device 200 heats the water according to the first heating power, so that the temperature of the hot water is not higher than the ignition temperature of the heat preservation layer; when the water inflow of the water inlet 101 of the heating cylinder 100 is higher, the electric heating device 200 heats the water according to the second heating power which is higher, so as to ensure that the water temperature meets the requirements. When the water inflow of the water inlet 101 of the heating cylinder 100 is lower, the electric heating device 200 is closed, so as to avoid dry burning, which causes the heating cylinder 100 to be overheated and causes the heat preservation layer to catch fire.

[0095] The heating cylinder assembly disclosed in the embodiments of the present application can be applied to a heat pump air conditioner. The heat pump air conditioner disclosed in the embodiments of the present application has all the technical effects of the heating cylinder assembly, which will not be described herein again.

[0096] As shown in the present application and claims, unless the context clearly indicates otherwise, "one", "a", "an", and / or "the" do not specify a single number but can include a plurality. Generally, the terms "comprising" and "including" only indicate the inclusion of the steps and elements explicitly identified, and these steps and elements do not constitute an exclusive list, and the method or device can also include other steps or elements. The element defined by the statement "comprising a" does not exclude the presence of another identical element in the process, method, product or device comprising the element.

[0097] In the description of the present application, unless otherwise explicitly limited, the words such as arrangement, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0098] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0099] The principles and implementation modes of the present application are described by using specific examples. The above description of the embodiments is only used to help understand the method and its core idea. It should be noted that those skilled in the art can make some improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A dry-burn prevention device, characterized by comprising: The utility model relates to a kind of water leakage protection device, including: Mounting pipe body (401); Piston body (402), sliding seal in the mounting pipe body (401), to divide the mounting pipe body (401) into first cavity and second cavity, the first cavity is used to communicate with the water route of equipment to be protected; Conductor trigger (407) is arranged in the second cavity, and is connected with the piston body (402); Reset elastic member (403) is arranged in the second cavity, and the piston body (402) is under the action of reset elastic member (403) and water pressure in the first cavity, sliding in the mounting pipe body (401); First wire harness (405), second wire harness (406) and always connect wire harness (404), the trigger end of always connect wire harness (404) is electrically connected with the conductor trigger (407), and the trigger end of first wire harness (405) and second wire harness (406) is arranged in the second cavity, and is arranged in the different position of the movement path of conductor trigger (407) respectively.

2. The anti-dryout device of claim 1 wherein, The mounting pipe body (401) is provided with support (4011), one end of the reset elastic member (403) is supported on the support (4011), and the other end is abutted on the conductor trigger (407) or the piston body (402); The trigger end of first wire harness (405) and second wire harness (406) is supported on the support (4011) by wire harness reset piece.

3. The anti-dryer burner device according to claim 2, wherein The conductor trigger (407) is fixed on the surface of the piston body (402) facing the second cavity; Or, The conductor trigger (407) is arranged with the piston body (402) interval, and is fixed on the piston body (402) by connecting rod (408).

4. The anti-burnout device of claim 1, wherein The trigger end of first wire harness (405) and second wire harness (406) is fixed on the side wall of the mounting pipe body (401); The conductor trigger (407) is arranged on the side wall of the piston body (402) or is connected to the side of the piston body (402) facing the second cavity.

5. The anti-dryer burner device according to claim 4, wherein First embedding groove and second embedding groove are respectively arranged on the side wall of the mounting pipe body (401) at different positions in axial direction; The trigger end of first wire harness (405) is embedded in the first embedding groove by first elastic member, and when the first elastic member is in natural state, the trigger end of first wire harness (405) is exposed outside the first embedding groove; The trigger end of second wire harness (406) is embedded in the second embedding groove by second elastic member, and when the second elastic member is in natural state, the trigger end of second wire harness (406) is exposed outside the second embedding groove.

6. A device for preventing dry-out as claimed in any one of claims 1 to 5, wherein The side surface of the piston body (402) facing the first cavity is perpendicular to the axis of the mounting pipe body (401); Or, The side surface of the piston body (402) facing the first cavity is obtuse angle with the axis of the mounting pipe body (401), and the inclined plane facing the water inlet direction.

7. A device for preventing dry-out as claimed in any one of claims 1 to 5 wherein, The mounting pipe body (401) is provided with a first limiting portion (4012) at one end of the first cavity to prevent the piston body (402) from being separated from the mounting pipe body (401).

8. A heating cartridge assembly comprising a heating cartridge (100) having an electrical heating device (200) disposed therein, characterised in that, Further comprising: The dry-burning prevention device (400) is arranged on the water path of the heating cylinder body (100), and the dry-burning prevention device (400) is the dry-burning prevention device (400) according to any one of claims 1-7, wherein the device to be protected is the heating cylinder body (100); The electric control board (500) is provided with a controller (501) and a wiring terminal (502), the wiring terminals of the first wiring harness (405), the second wiring harness (406) and the always-connected wiring harness (404) are respectively connected to the corresponding wiring terminals (502) of the electric control board (500), when the always-connected wiring harness (404) is connected to the second wiring harness (406) and disconnected from the first wiring harness (405), the controller (501) outputs a first control signal, when the always-connected wiring harness (404) is connected to the first wiring harness (405), the controller (501) outputs a second control signal, and when the always-connected wiring harness (404) is disconnected from the first wiring harness (405) and the second wiring harness (406), the controller (501) outputs a third control signal, the first control signal controls the electric heating device (200) to output a first heating power, the second control signal controls the electric heating device (200) to output a second heating power, and the third control signal controls the electric heating device (200) to be powered off, and the first heating power is less than the second heating power.

9. The heating cartridge assembly of claim 8, wherein, The heating cylinder body (100) comprises a circulating water inlet, and the dry-burning prevention device (400) is arranged on the circulating water inlet of the heating cylinder body (100); A mounting hole is formed in the side wall of the circulating water inlet and communicates with the circulating water inlet, and the mounting pipe body (401) is sealingly connected to the mounting hole; One end of the mounting pipe body (401) extends into the lumen of the circulating water inlet from the mounting hole, or the end of the mounting pipe body (401) that cooperates with the mounting hole is sunk into the mounting hole, the circulating water inlet for mounting the dry-burning prevention device (400) is the water inlet (101) and / or the water outlet (102) of the heating cylinder body (100).

10. A heat pump air conditioner characterized by comprising: The heating cylinder assembly comprises the heating cylinder body (100) and the dry-burning prevention device (400) according to any one of claims 8 or 9.

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