Heat pump unit and split heat pump water heater

Abstract

The application discloses a heat pump unit and a split heat pump water heater. The heat pump unit comprises a shell, an air inlet and an air outlet arranged on the shell, a heat exchanger, a centrifugal fan, a volute and a centrifugal fan blade, an air suction port and an air exhaust port arranged on the volute, the centrifugal fan blade arranged in the volute, a positioning installation part arranged on the volute, and a water pan provided with a guide installation part. The heat exchanger, the centrifugal fan and the water pan are located in the shell, the heat exchanger is arranged on the water pan, the air suction port is arranged opposite to the heat exchanger, and the air exhaust port is connected with the air outlet. The guide installation part is inserted and matched with the positioning installation part, and the guide installation part is configured to guide the positioning installation part to be slidably inserted and arranged on the guide installation part. The centrifugal fan is quickly and accurately assembled in place, so that the assembly precision is improved and the product qualification rate is improved.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology, and particularly relates to a heat pump unit and a split-type heat pump water heater. Background Technology

[0002] Water heaters are currently a common household appliance. They are generally classified into electric water heaters, gas water heaters, and heat pump water heaters, with heat pump water heaters being widely used due to their high energy efficiency.

[0003] Heat pump water heaters typically consist of a heat pump unit and a water tank. The heat pump unit comprises a compressor, an evaporator, and a fan, while the water tank usually includes a casing, an inner tank, and a condenser. Chinese Patent Publication No. CN 214665205 U discloses an air-source heat pump water heater unit with an air inlet and outlet on the casing, and a heat exchanger, compressor, and fan housed within the casing. In actual assembly, the centrifugal fan requires both a secure and reliable installation and accurate alignment with the air outlet on the casing. However, due to installation errors, misalignment between the centrifugal fan casing and the air outlet can easily occur, resulting in lower assembly precision and a reduced product yield.

[0004] Therefore, how to design a heat pump water heater that improves assembly precision to increase product qualification rate is the technical problem to be solved by this invention. Summary of the Invention

[0005] This invention provides a heat pump unit and a split-type heat pump water heater, enabling the centrifugal fan to be quickly and accurately assembled, thereby improving assembly accuracy and product qualification rate.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In one aspect, the present invention provides a heat pump unit, comprising:

[0008] The outer casing is provided with an air inlet and an air outlet;

[0009] Heat exchanger;

[0010] A centrifugal fan, comprising a volute and centrifugal blades, wherein the volute is provided with an air inlet and an air outlet, the centrifugal blades are disposed in the volute, and the volute is provided with a positioning and mounting part;

[0011] A water receiving tray, wherein the water receiving tray is provided with a guide mounting part;

[0012] The heat exchanger, the centrifugal fan, and the water receiving tray are located in the outer shell. The heat exchanger is mounted on the water receiving tray. The air intake is arranged opposite to the heat exchanger, and the air exhaust is connected to the air outlet. The guide mounting part is inserted into the positioning mounting part, and the guide mounting part is configured to guide the positioning mounting part to slide into the guide mounting part.

[0013] By setting a positioning mounting part on the volute of the centrifugal fan, and correspondingly setting a guide mounting part on the water receiving tray, the centrifugal fan is fixedly installed on the water receiving tray through the cooperation of the positioning mounting part and the guide mounting part. As for the positioning mounting part and the guide mounting part, the guide mounting part can guide the positioning mounting part during the installation of the centrifugal fan, so that the positioning mounting part can slide along the guide mounting part and be accurately inserted together. In this way, on the one hand, it can ensure that the centrifugal fan can be accurately installed in place, and on the other hand, it can ensure that the exhaust port and the outlet port of the centrifugal fan are accurately aligned, realizing the quick and accurate assembly of the centrifugal fan, thereby improving the assembly accuracy and the product qualification rate.

[0014] In one embodiment of this application, the bottom of the volute is provided with two positioning mounting parts, and the water receiving tray is provided with a guide mounting part corresponding to the positioning mounting parts.

[0015] In one embodiment of this application, the guide mounting part is a first positioning protrusion disposed on the water receiving tray, and the positioning mounting part is a first positioning groove disposed on the water receiving tray, wherein the first positioning protrusion is inserted into the corresponding first positioning groove.

[0016] In one embodiment of this application, the two first positioning protrusions are arranged at an angle to each other.

[0017] In one embodiment of this application, the included angle between the outer walls of the two first positioning protrusions is 30 degrees to 60 degrees.

[0018] In one embodiment of this application, the inner wall of the first positioning groove near the outer side forms an inclined surface that matches the outer wall of the first positioning protrusion.

[0019] In one embodiment of this application, the cross-sectional area of ​​the first positioning protrusion gradually decreases in the direction away from the water receiving tray, the first positioning groove forms a flared structure, and the inner contour of the first positioning groove matches the outer contour of the first positioning protrusion.

[0020] In one embodiment of this application, the guide mounting part is a second positioning groove provided on the water receiving tray, and the positioning mounting part is a second positioning protrusion provided on the water receiving tray, wherein the second positioning protrusion is inserted into the corresponding second positioning groove.

[0021] In one embodiment of this application, the volute is provided with a mounting hole that penetrates the positioning mounting part, and the guide mounting part is provided with a threaded hole, through which a screw passes and is threaded into the threaded hole.

[0022] In one embodiment of this application, the end of the volute away from the positioning and mounting part is provided with a flange structure, the flange structure overlaps the heat exchanger, and the heat exchanger is located between the flange structure and the water receiving tray.

[0023] On the other hand, an embodiment of the present invention also provides a split-type heat pump water heater, including a water tank and a heat pump unit, wherein a refrigerant pipe and a cable are connected between the water tank and the heat pump unit, and the heat pump unit is the heat pump unit described above.

[0024] In one embodiment of this application, the water tank includes an outer shell and an inner liner disposed within the outer shell, the inner liner being provided with an inlet pipe and an outlet pipe;

[0025] The heat pump water heater also includes a leak-proof device;

[0026] The leak-proof device includes:

[0027] The first water pipe is provided with a first inlet pipe head, a first connecting pipe head and a first outlet pipe head. The first water pipe is also provided with a first connecting flow channel. Port one of the first connecting flow channel is connected to the first inlet pipe head, and port two of the first connecting flow channel is connected to the first outlet pipe head.

[0028] The second water pipe is equipped with a second inlet pipe head, a second connecting pipe head and a second outlet pipe head that are interconnected. The second inlet pipe head is equipped with a one-way valve, which is used to control the water flow from the second inlet pipe head into the second water pipe in one direction.

[0029] A pressure on / off valve is provided in the first connecting pipe head and is used to open or close the second port of the first connecting flow channel according to the water pressure at the first connecting pipe head.

[0030] A connecting pipe, wherein the connecting pipe is connected between the first connecting pipe head and the second connecting pipe head;

[0031] The first water outlet pipe is connected to the water inlet pipe, and the second water inlet pipe is connected to the water outlet pipe. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the structure of the heat pump unit of the present invention;

[0034] Figure 2 This is one of the partial structural schematic diagrams of the heat pump unit of the present invention;

[0035] Figure 3 This is a second partial structural schematic diagram of the heat pump unit of the present invention;

[0036] Figure 4 This is a schematic diagram of the centrifugal fan of the present invention;

[0037] Figure 5 This is an exploded view of the centrifugal fan of the present invention;

[0038] Figure 6 This is a schematic diagram of the structure of the water tank of the present invention;

[0039] Figure 7 This is one of the structural schematic diagrams of the water-proof device of the present invention;

[0040] Figure 8 This is a second schematic diagram of the structure of the leak-proof device of the present invention;

[0041] Figure 9 for Figure 8 Sectional view along line AA;

[0042] Figure 10 for Figure 8 Sectional view along the BB direction;

[0043] Figure 11 for Figure 9 Enlarged view of a portion of region C in the middle;

[0044] Figure 12 This is a schematic diagram of the structure of the first water pipe of the present invention;

[0045] Figure 13 This is a cross-sectional view of the first water pipe of the present invention;

[0046] Figure 14 This is a schematic diagram of the structure of the second water pipe of the present invention;

[0047] Figure 15 This is a cross-sectional view of the second water pipe of the present invention;

[0048] Figure 16 This is a schematic diagram of the pressure on / off valve of the present invention;

[0049] Figure 17 This is an exploded view of the pressure on / off valve of the present invention;

[0050] Figure 18 This is a cross-sectional view of the flexible sealing component of the present invention. Detailed Implementation

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0052] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] This invention provides a heat pump water heater, which typically includes a heat pump unit and a water tank. The heat pump unit includes a casing, and components such as a compressor, evaporator, throttling device, and centrifugal fan installed in the casing. The water tank includes a shell, an inner tank, and a condenser.

[0054] The compressor, evaporator, throttling device, and condenser are connected to form a refrigerant circulation path, using the principle of a heat pump to heat the water in the inner tank. The above is the basic configuration of a conventional heat pump water heater, and will not be further restricted or elaborated upon here.

[0055] like Figures 1-5 As shown, the heat pump unit provided in this embodiment includes:

[0056] The outer casing 1 is provided with an air inlet 1001 and an air outlet 1002.

[0057] Heat exchanger 2;

[0058] Centrifugal fan 3 includes a volute 31 and a centrifugal fan blade 32. The volute 31 is provided with an air inlet 3001 and an air outlet 3002. The centrifugal fan blade 32 is disposed in the volute 31. The volute 31 is provided with a positioning and mounting part 311.

[0059] Water receiving tray 4, the water receiving tray 4 is provided with a guide installation part 41;

[0060] The heat exchanger 2, centrifugal fan 3 and water receiving tray 4 are located in the outer shell 1. The heat exchanger 2 is set on the water receiving tray 4. The air intake 3001 is arranged opposite to the heat exchanger 2. The air exhaust 3002 is connected to the air outlet 1002. The guide mounting part 41 and the positioning mounting part 311 are inserted and matched. The guide mounting part 41 is configured to guide the positioning mounting part 311 to slide and insert onto the guide mounting part 41.

[0061] Specifically, the heat pump unit is an independent component used in split-type heat pump water heaters. When in use, it can be installed outdoors as an outdoor unit, while the heat exchanger is connected to the condenser in the indoor water tank through refrigerant pipes.

[0062] During assembly, the centrifugal fan 3 is assembled onto the water receiving tray 4, and the centrifugal fan 3 is connected to the guide mounting part 41 on the water receiving tray 4 via the positioning mounting part 311 configured on the volute 31. On the one hand, the guide mounting part 41 can meet the requirements of connection, positioning and fixing with the positioning mounting part 311; on the other hand, the guide mounting part 41 can guide the positioning mounting part 311 to be accurately assembled into place, thereby improving the assembly accuracy.

[0063] In this way, after the centrifugal fan 3 is assembled on the water receiving tray 4, the positioning and mounting part 311 can cooperate with the guide mounting part 41 to improve the accuracy of the assembly position of the centrifugal fan 3, so as to facilitate the assembly personnel to install it quickly and accurately on site. Furthermore, after the centrifugal fan 3 is assembled in place, the exhaust port 3002 of the centrifugal fan 3 can be more accurately aligned with the air outlet 1002.

[0064] By setting a positioning mounting part on the volute of the centrifugal fan, and correspondingly setting a guide mounting part on the water receiving tray, the centrifugal fan is fixedly installed on the water receiving tray through the cooperation of the positioning mounting part and the guide mounting part. As for the positioning mounting part and the guide mounting part, the guide mounting part can guide the positioning mounting part during the installation of the centrifugal fan, so that the positioning mounting part can slide along the guide mounting part and be accurately inserted together. In this way, on the one hand, it can ensure that the centrifugal fan can be accurately installed in place, and on the other hand, it can ensure that the exhaust port and the outlet port of the centrifugal fan are accurately aligned, realizing the quick and accurate assembly of the centrifugal fan, thereby improving the assembly accuracy and the product qualification rate.

[0065] In one embodiment of this application, the bottom of the volute 31 is provided with two positioning mounting parts 311, and the water receiving tray 4 is provided with a guide mounting part 41 corresponding to the positioning mounting parts 311.

[0066] Specifically, in order to improve the reliability of the connection, two positioning mounting parts 311 are arranged at the bottom of the volute 31. The two positioning mounting parts 311 can provide good support for the volute 31 as a whole at the bottom. In addition, during the assembly process, the guide mounting parts 41 arranged on the water receiving tray 4 can guide and position the positioning mounting parts 311 on the volute 31 to improve the assembly accuracy more precisely.

[0067] In some embodiments, after the positioning mounting part 311 and the guide mounting part 41 are inserted into place, in order to more securely and reliably fasten the volute 31 and the water receiving tray 4, the volute 31 is provided with a mounting hole 312 that penetrates the positioning mounting part 311, and the guide mounting part 41 is provided with a threaded hole (not shown), and the screw passes through the mounting hole 312 and is threaded into the threaded hole.

[0068] Specifically, during the actual assembly process, the assemblers first use the positioning mounting part 311 and the guiding mounting part 41 to pre-assemble the centrifugal fan 3 onto the water receiving tray 4. Then, screws are passed through the mounting hole 312 from one side of the volute 31 of the centrifugal fan 3 and threaded into the threaded hole.

[0069] In this way, further securing the centrifugal fan 3 and the water receiving tray 4 with screws improves the reliability of the connection between the two, thereby reducing the possibility of the centrifugal fan 3 falling off due to fixing failure. At the same time, for the centrifugal fan 3, which has been properly positioned, it can always maintain a good fit between the exhaust port 3002 and the outlet port 1002.

[0070] In one embodiment of this application, the specific physical manifestations of the positioning mounting part 311 and the guiding mounting part 41 can adopt various structural forms, which are illustrated below with reference to the accompanying drawings.

[0071] The guide mounting part 41 is a first positioning protrusion provided on the water receiving tray 4, and the positioning mounting part 311 is a first positioning groove provided on the water receiving tray 4. The first positioning protrusion is inserted into the corresponding first positioning groove.

[0072] Specifically, the guide mounting part 41 is inserted into the positioning mounting part 311 to complete the insertion and engagement of the two. During assembly, the volute 31 engages with the first positioning protrusion below through the first positioning grooves arranged on both sides of its bottom. The first positioning protrusion is inserted into the corresponding first positioning groove, and during the process of the first positioning protrusion being inserted into the first positioning groove, the first positioning protrusion and the first positioning groove can cooperate with each other to guide the volute 31 to be pre-assembled into place.

[0073] In one embodiment, the two first positioning protrusions are arranged at an angle to each other.

[0074] Specifically, the two first positioning protrusions are inclined toward the middle position of the two. The inclined first positioning protrusions have a self-positioning and guiding function, so that the volute 31 has high accuracy after being assembled in place.

[0075] The included angle between the outer walls of the two first positioning protrusions is 30-60 degrees. This allows the two first positioning protrusions to achieve a better pre-positioning and centering effect on the volute 31 during assembly, which is more conducive to improving assembly efficiency and accuracy.

[0076] In some embodiments, the inner wall of the first positioning groove near the outer side forms an inclined surface that matches the outer wall of the first positioning protrusion.

[0077] Specifically, for the volute 31, the first positioning groove forms an inclined surface that matches the first positioning protrusion. The inclined surface cooperates with the outer wall of the first positioning protrusion to better play the role of guidance and positioning.

[0078] In another embodiment, the cross-sectional area of ​​the first positioning protrusion gradually decreases in the direction away from the water receiving tray 4, the first positioning groove forms a flared structure, and the inner contour of the first positioning groove matches the outer contour of the first positioning protrusion.

[0079] Specifically, the first positioning groove forms a trapezoidal slot structure, while the top of the first positioning protrusion is smaller, making it easier for assemblers to align and insert the first positioning protrusion into the first positioning groove. The bottom of the first positioning protrusion is larger, allowing the first positioning protrusion to fit more closely with the first positioning groove after the volute 31 is assembled.

[0080] To reduce the impact of machining and installation errors, a certain gap is formed between the first positioning protrusion and the first positioning groove. After the volute 31 is pre-positioned and assembled using the first positioning protrusion and the first positioning groove, it can be finely adjusted according to the alignment requirements of the exhaust port 3002 and the outlet 1002 of the worm gear, so that the exhaust port 3002 and the outlet 1002 can be aligned and accurately connected. Since the first positioning groove forms a trapezoidal groove, the gap range is 5% to 10% of the length of the upper base of the trapezoid formed by the first positioning groove. This design allows the volute 31 to have a degree of freedom of adjustment in this direction when fixed, thus solving the problem of misalignment between the exhaust port 3002 of the volute 31 and the outlet 1002 of the outer shell 1.

[0081] In another embodiment of this application, the guide mounting part 41 is a second positioning groove provided on the water receiving tray 4, and the positioning mounting part 311 is a second positioning protrusion provided on the water receiving tray 4, the second positioning protrusion being inserted into the corresponding second positioning groove.

[0082] Specifically, a protruding second positioning protrusion can be configured on the volute 31 and inserted into the second positioning groove configured in the water receiving tray 4 to achieve pre-assembly positioning.

[0083] In one embodiment of this application, the end of the volute 31 away from the positioning and mounting part 311 is provided with a flange structure 313, which overlaps the heat exchanger 2, and the heat exchanger 2 is located between the flange structure 313 and the water receiving pan 4.

[0084] Specifically, in addition to being assembled and fitted with the water receiving tray 4, the top of the volute 31 is also assembled and connected to the heat exchanger 2 via an extended flange structure 313 on one side. The flange structure 313 overlaps the heat exchanger 2 to support the top of the volute 31.

[0085] More importantly, the volute 31 is attached to the heat exchanger 2 and covers the leeward side of the heat exchanger 2. In this way, the negative pressure generated by the air inlet 3001 of the volute 31 interacts with the entire leeward side of the heat exchanger 2, so as to make full use of the heat exchange area of ​​the heat exchanger 2 to exchange heat with the air.

[0086] In one embodiment, extension plates 314 can be provided on both sides and the bottom of the volute 31, respectively. The extension plates 314 extend toward the corresponding side or bottom of the heat exchanger 2 and abut against the heat exchanger 2. The volute 31 and the heat exchanger 2 are separated by the extension plates 314, forming a negative pressure cavity between them. After the centrifugal fan 32 rotates, a negative pressure is formed in the negative pressure cavity. Under the action of the negative pressure formed in the negative pressure cavity, the entire surface of the heat exchanger 2 can be uniformly supplied with air from the air inlet side, so as to ensure that the heat exchanger 2 can exchange heat uniformly, thereby improving the heat exchange efficiency.

[0087] Example 2, as Figure 4 and Figure 5As shown, the volute 31 needs to meet the requirements for installing the centrifugal fan blade 32. The centrifugal fan blade 32 typically includes a motor 321 and a fan blade 322 mounted on the shaft of the motor 321. To meet the requirement that the motor 321 is installed inside the volute 31, the volute 31 includes a first volute 3101 and a second volute 3102. The first volute 3101 is provided with an air intake 3001, and the inner wall of the second volute 3102 is provided with an installation groove 3003. The first volute 3101 and the second volute 3102 are fastened together to form an air outlet 1002. The motor 321 is mounted in the installation groove 3003, and the fan blade 322 is located between the first volute 3101 and the second volute 3102 and covers the air intake 3001.

[0088] Specifically, by providing an mounting groove 3003 within the second volute 3102, the motor 321 is housed within the inner wall of the volute 31, eliminating the need for an additional support bracket. Using the mounting groove 3003 to install the motor 321 reduces manufacturing costs associated with adding a support bracket, and by housing the motor 321 within the volute 31, the overall size of the centrifugal fan 3 is effectively reduced.

[0089] In some embodiments, the air intake 3001 and the mounting groove 3003 are arranged opposite each other. The cross-section of the mounting groove 3003 is circular, and the center line of the mounting groove 3003 is collinear with the center line of the air intake 3001.

[0090] Specifically, the mounting groove 3003 is arranged directly opposite the air intake 3001, so that the suction force generated by the fan blade 322 can maximize the use of the opening of the air intake 3001 to achieve air intake, thereby improving the air delivery capacity.

[0091] In another embodiment, the second volute 3102 is provided with a protrusion 3004 protruding outward, and a mounting groove 3003 is formed in the protrusion 3004.

[0092] Specifically, a protrusion 3004 is formed on the second volute 3102, and a mounting groove 3003 is formed on the inner wall of the second volute 3102 using the protrusion 3004, to meet the requirement that the motor 321 is built into the volute 31. At the same time, forming the mounting groove 3003 in the protrusion 3004 can reduce the impact on the rotation of the fan blade 322 caused by the installation of the motor 321 inside the volute 31.

[0093] In one embodiment, a first reinforcing rib 3005 is provided on the bottom surface of the mounting groove 3003 opposite to the motor 321. The first reinforcing rib 3005 can enhance the structural strength of the mounting groove 3003 on the inner wall of the second volute 3102 to meet the installation requirements of the motor 321.

[0094] In another embodiment, a plurality of second reinforcing ribs 3006 are provided on the outer surface of the second volute 3102 around the protrusion 3004. By providing a plurality of second reinforcing ribs 3006 on the outer surface of the second volute 3102, the overall structural strength of the second volute 3102 can be enhanced to support the supporting force required for the motor 321 to operate inside the second volute 3102.

[0095] To further enhance the overall structural strength of the second volute 3102, an outwardly protruding reinforcing ring 3007 is provided on the outer surface of the second volute 3102 around the protrusion 3004, and second reinforcing ribs 3006 are arranged alternately with the reinforcing rings 3007. The reinforcing rings 3007 and second reinforcing ribs 3006 cooperate with each other to increase the structural strength around the protrusion 3004. As needed, multiple layers of reinforcing rings 3007 are provided on the outer surface of the second volute 3102 around the protrusion 3004.

[0096] In other embodiments, since the motor 321 is built into the volute 31, a wire-passing hole 3008 can be provided on the protrusion 3004 to facilitate the connection of the power cord of the motor 321 to the external control board. The power cord of the motor 321 passes through the wire-passing hole 3008. In order to facilitate the layout and routing of the wiring, the outer surface of the second volute 3102 is also provided with a hook 3009 for positioning the power cord of the motor 321. The power cord of the motor 321 is output from the inside of the volute 31 through the wire-passing hole 3008 and hung on the hook 3009 for easy installation and connection.

[0097] In some embodiments, in order to securely and reliably install the motor 321, the sidewall of the mounting groove 3003 is provided with a stepped surface (not marked), and a fixing hole is provided on the stepped surface. The outer periphery of the motor 321 is provided with an outwardly extending connecting arm 323, and the connecting arm 323 is fixed to the fixing hole by screws.

[0098] Specifically, the end of the motor 321 is inserted into the mounting groove 3003, and the connecting arm 323 extending out from the outer periphery of the motor 321 is fixedly connected to the fixing hole on the stepped surface by bolts to ensure that the motor 321 can be firmly fixed on the second volute 3102.

[0099] Example 3: In one embodiment of the present invention, a split-type heat pump water heater is also provided, which includes a water tank 1000 and a heat pump unit 2000, wherein the water tank and the heat pump unit are independently set up, and are connected by a refrigerant pipe and a cable. For the specific connection method of the split-type heat pump water heater, refer to conventional heat pump water heaters; no limitations or details are provided here.

[0100] Among them, such as Figures 6-18As shown, to improve the leak-proof performance of the water tank, the split-type heat pump water heater also includes a leak-proof device 3000, which includes:

[0101] The first water pipe 100 is provided with a first inlet pipe head 101, a first connecting pipe head 102 and a first outlet pipe head 103. The first water pipe 100 is also provided with a first connecting channel 104. One port of the first connecting channel 104 is connected to the first inlet pipe head 101 and the other port of the first connecting channel 104 is connected to the first outlet pipe head 103.

[0102] The second water pipe 200 is provided with a second inlet pipe head 201, a second connecting pipe head 202 and a second outlet pipe head 203 that are interconnected. The second inlet pipe head 201 is provided with a one-way valve 208, which is used to control the water flow from the second inlet pipe head 201 into the second water pipe 200 in one direction.

[0103] Pressure on / off valve 300 is installed in the first connecting pipe head 102 and is used to open and close port 2 of the first connecting flow channel 104 according to the water pressure at the first connecting pipe head 102.

[0104] Connecting pipe 400 is connected between first connecting pipe head 102 and second connecting pipe head 202.

[0105] Specifically, the water tank 1000 includes an outer shell and an inner liner disposed within the outer shell 1, with an inlet pipe 10001 and an outlet pipe 10002 disposed on the inner liner. The leak-proof device 3000 mainly includes a first water pipe 100, a second water pipe 200, a pressure shut-off valve 300, and a connecting pipe 400.

[0106] The first inlet pipe 101 of the first water pipe 100 is used to connect with the external water supply pipe to introduce tap water from the municipal water supply network. The first outlet pipe 103 of the first water pipe 100 is connected to the water inlet pipe 10001 of the water tank in the user's home so that tap water can be delivered to the water tank.

[0107] The second inlet pipe 201 of the second water pipe 200 is used to connect to the outlet pipe 10002 of the water tank, thereby enabling the water heated by the water tank to be output. The second outlet pipe 203 of the second water pipe 200 is connected to the water terminal in the user's home to realize the final output of water.

[0108] The first water pipe 100 and the second water pipe 200 are connected by a connecting pipe 400, thereby enabling the first connecting pipe head and the second connecting pipe head to communicate with each other.

[0109] The pressure on / off valve 300 in the first connecting pipe head can perform corresponding actions based on the pressure generated between the water pressure in the first connecting pipe head and the second port of the first connecting flow channel 104, so as to achieve the purpose of preventing water leakage.

[0110] During the user's water usage at the water terminal, the second water pipe 200 connects to the water terminal via the second outlet pipe, outputting water upwards. At this time, the water pressure in the second water pipe 200 is lower than the water pressure at the first inlet pipe 101. Simultaneously, because the first connecting pipe is connected to the second connecting pipe via the connecting pipe 400, the water pressure at the first connecting pipe also decreases accordingly. The water introduced from the first inlet pipe 101 is output through the pressure on / off valve 300 at port two of the first connecting channel 104 and finally flows into the water tank via the first outlet pipe 103.

[0111] After the user turns off the water terminal, the tap water pressure from the external water supply pipe is transmitted to the second water pipe 200, causing the water pressure at the first connecting pipe head to gradually increase and eventually become the same as the water pressure in the first inlet pipe head 101. At this time, the pressure switch valve 300 will automatically reset to close the second port of the first connecting flow channel 104.

[0112] At this time, if the inner tank of the water tank itself cracks and leaks, because the second inlet pipe 201 of the second pipe body is equipped with the one-way valve, the leakage at the water terminal will not cause a change in the water pressure in the second pipe body. As a result, the pressure shut-off valve 300 will always be in the state of closing port two of the first connecting flow channel 104. Ultimately, in the event of damage inside the water tank, no tap water will be input into the water tank and cause serious leakage.

[0113] By configuring a pressure shut-off valve in the first water pipe, the pressure shut-off valve is completely built into the first water pipe. The first water pipe is connected to the water supply pipe (tap water pipe) in the user's home through the first water inlet head. The first water pipe and the second water pipe are respectively installed on the water tank in the user's home. When the water tank is in use, the water introduced by the first water pipe is processed by the water tank and then output from the second water pipe. At this time, since the connecting pipe connects the first connecting head and the second connecting head, the water pressure in the first connecting head is lower than the water pressure in the first water inlet head. At this time, the pressure shut-off valve opens the second port of the first connecting flow channel so that the first water inlet head and the first water outlet head are connected to achieve water supply. When the water tank is turned off, the water pressure in the first and second water pipes gradually becomes the same, achieving water pressure balance in the first inlet pipe and the first connecting pipe. At this time, the pressure shut-off valve automatically resets and closes port two of the first connecting flow channel. In the event of leakage inside the water tank, the one-way valve in the second inlet pipe ensures that the water pressure in the first inlet pipe and the first connecting pipe remains balanced, thus preventing water from being discharged from the first water pipe, reducing the risk of leakage and improving the reliability of the electrical appliances.

[0114] In some embodiments, the pressure on / off valve 300 mainly relies on the water pressure difference between the first inlet pipe head 101 and the first connecting pipe head to achieve mechanical on / off control.

[0115] Therefore, the pressure on / off valve 300 may include a spring 301 and a flexible sealing component 302. The flexible sealing component 302 is disposed in the first connecting pipe head 102 and is used to switch the second port of the first connecting flow channel 104. The spring 301 is disposed in the first connecting pipe head 102 and is used to apply a spring force to the flexible sealing component 302 in the direction of the second port of the first connecting flow channel 104.

[0116] Specifically, the flexible sealing component 302 is arranged opposite to port two of the first connecting channel 104 and is used to block port two of the first connecting channel 104. The flexible sealing component 302 is subjected to water pressure in different pipe heads on both sides in the first connecting pipe head, thereby deforming according to the pressure difference, and thus opening and closing port two of the first connecting channel 104.

[0117] During the process of a user using water through a water terminal, the water pressure in the first connecting pipe head decreases. Under the action of the water pressure at port two of the first connecting channel 104, the flexible sealing component 302 will deform and open port two of the first connecting channel 104. Water that enters the first water pipe 100 from the first inlet pipe head 101 will be output from port two of the first connecting channel 104 and finally flow into the water tank from the first outlet pipe head 103.

[0118] When the user turns off the water terminal and stops using water, the water pressure in the first connecting pipe head gradually increases, thereby gradually offsetting the water pressure generated at port two of the first connecting channel 104. Furthermore, under the action of the spring 301, the flexible sealing component 302 deforms toward port two of the first connecting channel 104 and finally blocks port two of the first connecting channel 104.

[0119] In some embodiments, to facilitate the installation of the flexible sealing component 302, the flexible sealing component 302 is formed with a sealing part 3021, an elastic deformation part 3022 and a mounting and fixing part 3023. The elastic deformation part 3022 is connected between the sealing part 3021 and the mounting and fixing part 3023. The sealing part 3021 is arranged opposite to the port 2 of the first connecting flow channel 104, and the mounting and fixing part 3023 is disposed on the inner wall of the first connecting pipe head 102.

[0120] Specifically, the sealing part 3021 formed by the flexible sealing component 302 is used to block the second port of the first connecting channel 104, the elastic deformation part 3022 is used to meet the requirement that the sealing part 3021 can open and close the second port of the first connecting channel 104 under different water pressures, and the mounting and fixing part 3023 is used to be installed in the first connecting pipe head.

[0121] In some embodiments, the pressure on / off valve 300 further includes a mounting support 303 disposed in the first connecting pipe head, and a spring 301 disposed between the mounting support 303 and the sealing part 3021. The spring 301 is used to apply a spring force to the sealing part 3021 in the direction of the port two of the first connecting flow channel 104.

[0122] Specifically, in order to facilitate the installation of the spring 301 in the first connecting pipe head, a mounting support 303 can be set in the first connecting pipe head by means of threaded connection or interference fit, and the mounting support 303 is used to support the spring 301 so that the spring 301 can provide effective elastic force to the sealing part 3021.

[0123] The mounting support 303 includes an outer sleeve 3031 and an inner sleeve 3032. The outer sleeve 3031 is fitted over the inner sleeve 3032, and a water flow channel 3033 is formed between the outer sleeve 3031 and the inner sleeve 3032. The outer sleeve 3031 is threaded into the first connecting pipe head, and the spring 301 is disposed in the inner sleeve 3032.

[0124] Specifically, during assembly, the outer sleeve 3031 is installed in the first connecting pipe head by means of a threaded connection. Since the outer sleeve 3031 and the inner sleeve 3032 are connected to each other, the inner sleeve 3032 can be used to support the installation spring 301.

[0125] The inner sleeve 3032 can be suspended in the outer sleeve 3031 by a connecting rod, thereby forming a water flow channel 3033.

[0126] The water flow channel 3033 can ensure that the water pressure in the connecting pipe 400 is directly transmitted to the flexible sealing component 302, so as to ensure that the water path is unobstructed and that the water pressure can be accurately transmitted.

[0127] In some embodiments, in order to securely install the flexible sealing component 302, a mounting ring 105 is provided in the first water pipe 100, and the mounting fixing part 3023 is sandwiched between the mounting ring 105 and the outer sleeve 3031.

[0128] Specifically, an installation ring 105 is provided on the inner wall of the first water pipe 100 on one side of the first connecting flow channel 104. The installation ring 105 cooperates with the outer sleeve 3031 to fix the flexible sealing component 302.

[0129] During assembly, the flexible sealing component 302 is placed into the first connecting pipe head and abutted against the mounting ring 105. Then, the outer sleeve 3031 is inserted into the first connecting pipe head. After the outer sleeve 3031 is installed in place, the mounting fixing part 3023 is clamped between the mounting ring 105 and the outer sleeve 3031 to achieve a firm fixation of the flexible sealing component 302.

[0130] In some embodiments, an adjusting component 304 is also provided in the inner sleeve 3032, the adjusting component 304 being threadedly connected in the inner sleeve 3032 and abutting against the spring 301.

[0131] Specifically, the water pressure of water supply networks varies in different regions. Therefore, it is necessary to adjust the elastic force generated by the spring 301 on the flexible sealing component 302 according to the local water pressure, so as to ensure that the flexible sealing component 302 can play a good sealing role on the first connecting flow channel 104.

[0132] In practical use, when installing the device in a user's home, before connecting the connecting pipe 400 to the first water pipe 100 and the second water pipe 200, the operator can adjust the adjusting component 304 to change the deformation of the spring 301 in its initial state, thereby meeting the water pressure requirements of the local water supply network. The adjusting component 304 is preferably a threaded component such as a bolt.

[0133] After adjusting the initial deformation of the spring 301, the connecting pipe 400 can be connected between the first water pipe 100 and the second water pipe 200.

[0134] In another embodiment, to facilitate the user to directly switch the water circuit on and off of the anti-leakage device, a first auxiliary connector 106 is provided on the first water pipe 100, a first partition 107 is provided in the first auxiliary connector 106, a first water inlet (unmarked) and a first water outlet (unmarked) are provided on the first partition 107, and the port 2 of the first connecting channel 104, the first water inlet, the first water outlet and the first water outlet pipe head 103 are connected in sequence;

[0135] A first switching valve 108 is provided in the first auxiliary connector 106. The first switching valve 108 is arranged opposite to the first partition 107 and is used to switch the first water inlet and / or the first water outlet.

[0136] Specifically, in actual use, when the user needs to completely shut off the leak-proof device, the first switch valve 108 can be operated to open and close the first inlet and / or the first outlet to actively control the flow path between the first inlet pipe head 101 and the first outlet pipe head 103, thereby completely shutting off the leak-proof device as needed, which further improves the reliability of use.

[0137] The specific structure of the first switching valve 108 can adopt the valve core structure of a conventional water valve, and will not be restricted or elaborated here.

[0138] In another embodiment, a second connecting channel 204 is also provided inside the second water pipe 200. One port of the second connecting channel 204 is connected to the second inlet pipe head 201, and the other port of the second connecting channel 204 is connected to the second connecting pipe head 202 and the second outlet pipe head 203, respectively.

[0139] Specifically, in order to meet the requirement of supplying water to the second water inlet head 201 and the second water outlet head 203 and the second connecting head together, a second connecting flow channel 204 is configured in the second water pipe 200 to realize the distribution of water flow.

[0140] Similarly, in order to completely shut off the second water pipe 200, a second auxiliary connector 205 is provided on the second water pipe 200. A second baffle 206 is provided in the second auxiliary connector 205. A second water inlet and a second water outlet are provided on the first baffle 107. The second port of the second connecting channel 204 is the second water inlet. The second water outlet is connected to the second water outlet head 203 and the second connecting pipe head, respectively. A second switching valve 207 is provided in the second auxiliary connector 205. The second switching valve 207 is arranged opposite to the second baffle 206 and is used to switch the second water inlet and / or the second water outlet.

[0141] Specifically, in actual use, when the user needs to completely shut off the second water pipe 200, the second switch valve 207 can be operated to open and close the second water inlet and / or the second water outlet to actively control the flow path between the second water inlet head 201, the second water outlet head 203, and the second connecting head, thereby completely shutting off the second water pipe as needed, which further improves the reliability of use.

[0142] The specific structure of the second switching valve 207 can adopt the valve core structure of a conventional water valve, and will not be restricted or elaborated here.

[0143] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions claimed by the present invention.

Claims

1. A heat pump unit, characterized by include: The outer casing is provided with an air inlet and an air outlet; Heat exchanger; A centrifugal fan, comprising a volute and centrifugal blades, wherein the volute is provided with an air inlet and an air outlet, the centrifugal blades are disposed in the volute, and the volute is provided with a positioning and mounting part; A water receiving tray, wherein the water receiving tray is provided with a guide mounting part; The heat exchanger, the centrifugal fan, and the water receiving tray are located in the outer shell. The heat exchanger is mounted on the water receiving tray. The air intake is arranged opposite to the heat exchanger, and the air exhaust is connected to the air outlet. The guide mounting part is inserted into the positioning mounting part, and the guide mounting part is configured to guide the positioning mounting part to slide into the guide mounting part. The bottom of the volute is provided with two positioning mounting parts, and the water receiving tray is provided with a guide mounting part corresponding to the positioning mounting parts; The guide mounting part is a first positioning protrusion provided on the water receiving tray, and the positioning mounting part is a first positioning groove provided on the water receiving tray, with the first positioning protrusion inserted into the corresponding first positioning groove; The two first positioning protrusions are arranged at an angle to each other, and the inner wall of the first positioning groove near the outer side forms an inclined surface that matches the outer wall of the first positioning protrusion.

2. The heat pump unit according to claim 1, characterized in that, The included angle between the outer walls of the two first positioning protrusions is 30 degrees to 60 degrees.

3. The heat pump unit of claim 1, wherein, The cross-sectional area of ​​the first positioning protrusion gradually decreases in the direction away from the water receiving tray, the first positioning groove forms a flared structure, and the inner contour of the first positioning groove matches the outer contour of the first positioning protrusion.

4. The heat pump unit of claim 1, wherein, The volute is provided with a mounting hole that penetrates the positioning mounting part, and the guide mounting part is provided with a threaded hole. The screw passes through the mounting hole and is threaded into the threaded hole.

5. Heat pump unit according to any of claims 1-4, characterized in that, The end of the volute away from the positioning and mounting part is provided with a flange structure, the flange structure overlaps the heat exchanger, and the heat exchanger is located between the flange structure and the water receiving tray.

6. A split type heat pump water heater comprising a water tank and a heat pump unit, a refrigerant pipe and a cable being connected between the water tank and the heat pump unit, characterized in that, The heat pump unit is the heat pump unit as described in any one of claims 1-5.

7. The split-type heat pump water heater according to claim 6, wherein The water tank includes an outer shell and an inner liner disposed within the outer shell, the inner liner being provided with an inlet pipe and an outlet pipe; The heat pump water heater also includes a leak-proof device; The leak-proof device includes: The first water pipe is provided with a first inlet pipe head, a first connecting pipe head and a first outlet pipe head. The first water pipe is also provided with a first connecting flow channel. Port one of the first connecting flow channel is connected to the first inlet pipe head, and port two of the first connecting flow channel is connected to the first outlet pipe head. The second water pipe is equipped with a second inlet pipe head, a second connecting pipe head and a second outlet pipe head that are interconnected. The second inlet pipe head is equipped with a one-way valve, which is used to control the water flow from the second inlet pipe head into the second water pipe in one direction. A pressure on / off valve is provided in the first connecting pipe head and is used to open or close the second port of the first connecting flow channel according to the water pressure at the first connecting pipe head. A connecting pipe, wherein the connecting pipe is connected between the first connecting pipe head and the second connecting pipe head; The first water outlet pipe head is connected with the water inlet pipe, and the second water inlet pipe head is connected with the water outlet pipe.

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