A cooling structure for hot water circulation pump

Abstract

The present invention discloses a cooling structure for a hot water circulation pump, which belongs to the technical field of hot water circulation pumps, and comprises: a pump casing, in which an impeller is rotatably installed; a motor casing, in which a stator and a rotor are arranged, and the stator is fixedly installed inside the motor casing; a main shaft, the bottom end of which is fixedly connected to the impeller; a refrigerator, which is movably plugged into one side of the pump casing; and a linkage mechanism, which comprises a rotating disk, a conical disk, two horizontal plates and two fixed frames. The present invention can realize water circulation and conveying by guiding water into the interior of the main shaft to realize cooling of the main shaft through the cooperation of the provided main shaft and spiral blades, and can start the refrigerator to pre-cool the water entering the main shaft when the speed of the main shaft increases through the provided linkage mechanism, and automatically adjust the cooling power according to the speed increase of the main shaft, so as to ensure the cooling effect on the interior of the motor casing and avoid damage caused by overheating.

Description

Technical Field

[0001] The invention relates to the technical field of hot water circulation pumps, and in particular to a cooling structure for a hot water circulation pump. Background Art

[0002] Hot water circulation pump refers to the pump used to transport the circulating liquid for reaction, absorption, separation and absorption liquid regeneration in the device. Its head is relatively low and is only used to overcome the pressure drop of the circulation system. A low head pump can be used. The circulation pump refers to the function of the pump, and the centrifugal pump refers to the structure of the pump. The two are completely two different concepts. The working principle of the circulation pump is to circulate water. The pump used is called a circulation pump. For example, the hot water in the water heating pipe is circulated by a circulation pump.

[0003] Currently, hot water circulation pumps mostly rely on natural wind for cooling, and the cooling efficiency is low. During continuous use, the hot water circulation pump is prone to overheating and damage during continuous operation; therefore, we propose a cooling structure for hot water circulation pumps to solve this problem. Summary of the invention

[0004] The object of the present invention is to provide a cooling structure for a hot water circulation pump to solve the problems raised in the above background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A cooling structure for a hot water circulation pump, comprising:

[0007] A pump casing, in which an impeller is rotatably mounted;

[0008] A motor housing, wherein a stator and a rotor are arranged in the motor housing, and the stator is fixedly installed inside the motor housing;

[0009] A main shaft, the bottom end of which is fixedly connected to the impeller, and the main shaft is fixedly connected to the rotor, a cavity is provided inside the main shaft, a spiral blade is provided inside the cavity, and a plurality of inlet holes and a plurality of outlet holes are provided on the outside of the main shaft, a water inlet hole is provided inside the pump housing, and one end of the water inlet hole is connected to the inlet hole;

[0010] A refrigerator, the refrigerator being movably plugged into one side of the pump housing, and a plurality of refrigeration columns being connected to a refrigeration end of the refrigerator, and the other ends of the plurality of refrigeration columns extending into the water inlet hole;

[0011] A linkage mechanism, the linkage mechanism includes a rotating disk, a conical disk, two horizontal plates and two fixed frames, a plurality of linkage plates are slidably connected between the rotating disk and the conical disk, and the fixed frame is fixedly installed on the top of the pump housing, and a sliding frame and a connecting frame are slidably sleeved on the outer side of the fixed frame, the front and rear sides of the connecting frame are rotatably connected with arc-shaped connecting rods, the top end of the arc-shaped connecting rod is rotatably connected to the outer side of the corresponding horizontal plate, the two sides of the sliding frame are respectively fixedly connected with a touch button and a varistor, the touch button is connected to the refrigerator signal, and the touch button controls the start of the refrigerator after being pressed, the varistor is connected in series with the refrigerator, and the rotating disk is fixedly sleeved on the outer side of the main shaft.

[0012] Preferably, the top of the horizontal plate is fixedly connected with an arc frame, the bottom of the conical plate is fixedly installed with an annular guide rail, and the arc frame is slidably sleeved on the outer side of the annular guide rail;

[0013] A touch panel is fixedly mounted on one side of the connection frame, and the touch panel is adapted to the touch button;

[0014] The other end of the varistor is fixedly connected to a pressure plate, the other side of the pressure plate is fixedly connected to a compression spring, the other end of the compression spring is fixedly connected to the fixing frame, and the transverse plate is slidably sleeved on the outer side of the corresponding fixing frame.

[0015] Preferably, a plurality of slide grooves are provided at the bottom of the rotating disk, and limit strips are integrally formed on the inner walls on both the front and rear sides of the slide grooves, the linkage plate is slidably connected in the corresponding slide grooves, and limit grooves adapted to the limit strips are provided on both the front and rear sides of the linkage plate;

[0016] The top of the conical disk is integrally formed with a plurality of T-shaped protrusions, and the linkage plate is slidably sleeved on the outer sides of the corresponding T-shaped protrusions;

[0017] An L-shaped guide rod is fixedly connected inside the conical disk, and the rotating disk is slidably sleeved on the outer side of the L-shaped guide rod.

[0018] Preferably, connection springs are fixedly connected to both the front and rear sides of the bottom of the rotating disk, and the bottom end of the connection spring is fixedly connected to the conical disk.

[0019] Preferably, a water inlet and a water outlet are respectively provided on both sides of the pump housing, and a water inlet flange and a water outlet flange are respectively fixedly installed on both sides of the pump housing;

[0020] A water outlet hole is opened on one side of the pump housing, one end of the water outlet hole is connected to the derivation hole, the other end of the water outlet hole is connected to a curved pipe, and the other end of the curved pipe extends into the water outlet.

[0021] Preferably, a locating bearing and a sealing bearing are provided inside the motor housing, and the inner rings of the locating bearing and the sealing bearing are fixedly sleeved on the outer side of the main shaft.

[0022] Preferably, a plurality of supporting ribs are fixedly mounted on the bottom of the pump housing, and the bottoms of the plurality of supporting ribs are fixedly connected to the same base;

[0023] A plurality of heat dissipation fins are fixedly mounted on the outer side of the motor housing, and the motor housing is further fixedly connected with a plurality of support frames, and the support frames are fixedly connected to the top of the pump housing.

[0024] The beneficial effects of the present invention are:

[0025] 1. In the present invention, the cooling structure for a hot water circulation pump is described, by connecting the water inlet flange and the water outlet flange to the water supply pipe and the drainage pipe respectively, so that water enters the pump casing through the water inlet, and generates a rotating magnetic field after the stator is energized, thereby driving the rotor to rotate, thereby driving the main shaft to rotate, and the main shaft drives the impeller to rotate. When the impeller rotates, the water is subjected to the centrifugal force, is thrown to the periphery of the impeller and discharged from the water outlet, thereby realizing the circulation and transportation of water;

[0026] 2. In the present invention, a cooling structure for a hot water circulation pump drives the spiral blades inside the main shaft to rotate. The spiral blades generate an upward thrust during the rotation process, so that a negative pressure is generated at the inner bottom of the cavity, so that the water inside the pump casing enters the inner bottom of the cavity through the water inlet hole and the introduction hole, and then moves upward under the rotation and conveying action of the spiral blades, and then re-enters the water outlet of the water pump along the lead-out hole, the water outlet hole and the elbow. When the water flows through the main shaft, the heat can be taken away, so as to achieve a circulating cooling effect on the inside of the motor casing, thereby avoiding overheating inside the motor casing, and the heat of the rotor and the main shaft can be used to heat the water to achieve heat utilization;

[0027] 3. In the present invention, a cooling structure for a hot water circulation pump is described, which adjusts the speed of the rotor and the main shaft by changing the frequency of the motor stator power supply, thereby adjusting the water delivery speed, and the main shaft drives the rotating disk to rotate while rotating, and the rotating disk drives the linkage plate and the cone plate to rotate synchronously, and the multiple linkage plates move away from each other under the action of centrifugal force, and cannot drive the cone plate to move downward by cooperating with the T-shaped protrusion, and stretch the connecting spring, and the cone plate drives the horizontal plate to move downward by cooperating with the annular guide rail and the arc frame, and the horizontal plate drives the two connecting frames to move away from each other through the arc connecting rod, and when the main shaft speed is greater, the centrifugal force of the linkage plate is greater, so that the distance the horizontal plate moves downward is greater, and the distance between the two connecting frames is greater. When the main shaft speed is large enough, the connecting frame moves so that the touch panel contacts the touch button, thereby controlling the refrigerator to turn on, and the water flowing through the water inlet hole is cooled by the cooling column, and the cooled water flows through the main shaft, thereby improving the cooling effect of the main shaft;

[0028] 4. In the present invention, in the cooling structure for a hot water circulation pump, when the speed of the main shaft continues to increase, the two touch panels push the two touch buttons to drive the two slide frames away from each other, and the pressure plate squeezes the compression spring, and at the same time increases the pressure on the varistor, and reduces the resistance of the varistor itself. Since the varistor is connected in series with the refrigerator, the power of the refrigerator is increased to improve the cooling effect of the water in the water inlet hole, so that the cooling effect can be improved as the speed of the main shaft increases to avoid overheating;

[0029] 5. In the present invention, a cooling structure for a hot water circulation pump can realize water circulation and delivery by introducing water into the interior of the main shaft to realize cooling of the main shaft through the cooperation of the main shaft and the spiral blades, and can start the refrigerator to pre-cool the water entering the main shaft when the main shaft speed increases through the linkage mechanism, and automatically adjust the cooling power according to the increase in the main shaft speed, so as to ensure the cooling effect on the inside of the motor housing and avoid damage caused by overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of the three-dimensional structure of a cooling structure for a hot water circulation pump proposed by the present invention;

[0031] Figure 2 A cross-sectional structural schematic diagram of a cooling structure for a hot water circulation pump proposed by the present invention;

[0032] Figure 3 for Figure 2 A partial enlarged view of the

[0033] Figure 4 for Figure 2 A partial enlarged view of part A;

[0034] Figure 5 This is a three-dimensional structural schematic diagram of the main shaft, impeller and linkage mechanism proposed by the present invention;

[0035] Figure 6 It is a schematic diagram of the partial three-dimensional structure of the main shaft proposed by the present invention;

[0036] Figure 7 It is a schematic cross-sectional structural diagram of the main shaft proposed by the present invention;

[0037] Figure 8 for Figure 7 A partial enlarged view of part B;

[0038] Fig. 9 It is a three-dimensional structural schematic diagram of the linkage mechanism proposed by the present invention;

[0039] Fig.10 It is a cross-sectional structural schematic diagram of the linkage mechanism proposed by the present invention;

[0040] Fig.11 for Fig.10 A partial enlarged view of part C in the middle;

[0041] Fig.12 This is a schematic diagram of the exploded three-dimensional structure of the rotating disk, conical disk and linkage plate proposed by the present invention.

[0042] In the figure: 1. pump housing; 101. water inlet; 102. water outlet; 103. water inlet flange; 104. water outlet flange; 105. water inlet hole; 106. water outlet hole; 2. motor housing; 201. cooling fins; 202. support frame; 203. stator; 204. rotor; 205. positioning bearing; 206. sealing bearing; 3. main shaft; 301. spiral blade; 302. outlet hole; 303. inlet hole; 4. refrigerator; 401. cooling column; 5. Rotating disk; 501, slide groove; 502, connecting spring; 6, conical disk; 601, T-shaped protrusion; 602, annular guide rail; 7, horizontal plate; 701, arc frame; 8, fixed frame; 9, slide frame; 10, connecting frame; 11, arc connecting rod; 12, compression spring; 13, pressure plate; 14, varistor; 15, touch button; 16, touch pad; 17, impeller; 18, linkage plate; 19, L-shaped guide rod; 20, bent pipe; 21, base; 22, supporting ribs. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0044] Reference Figure 1 - Fig.12, a cooling structure for a hot water circulation pump, comprising:

[0045] A pump casing 1, in which an impeller 17 is rotatably mounted;

[0046] A motor housing 2, wherein a stator 203 and a rotor 204 are disposed in the motor housing 2, and the stator 203 is fixedly mounted inside the motor housing 2;

[0047] A main shaft 3, the bottom end of which is fixedly connected to the impeller 17, and the main shaft 3 is fixedly connected to the rotor 204, a cavity is provided inside the main shaft 3, a spiral blade 301 is provided inside the cavity, and a plurality of inlet holes 303 and a plurality of outlet holes 302 are provided on the outside of the main shaft 3, the plurality of inlet holes 303 and the plurality of outlet holes 302 are arranged in an annular shape with equal spacing, a water inlet hole 105 is provided inside the pump housing 1, and one end of the water inlet hole 105 is connected to the inlet hole 303;

[0048] A refrigerator 4 is movably plugged into one side of the pump housing 1, and a plurality of cooling columns 401 are connected to the cooling end of the refrigerator 4, and the other ends of the plurality of cooling columns 401 extend into the water inlet hole 105, and the water passing through the water inlet hole 105 is cooled by the cooling column 401 shell;

[0049] The linkage mechanism includes a rotating disk 5, a conical disk 6, two transverse plates 7 and two fixed frames 8. A plurality of linkage plates 18 are slidably connected between the rotating disk 5 and the conical disk 6, and the fixed frame 8 is fixedly installed on the top of the pump housing 1, and a sliding frame 9 and a connecting frame 10 are slidably sleeved on the outer side of the fixed frame 8. The front and rear sides of the connecting frame 10 are rotatably connected with an arc connecting rod 11, and the top end of the arc connecting rod 11 is rotatably connected to the outer side of the corresponding transverse plate 7, so that a linkage can be generated between the transverse plate 7 and the connecting frame 10 through the arc connecting rod 11. A touch button 15 and a varistor 14 are fixedly connected on both sides of the sliding frame 9, respectively. The touch button 15 is connected to the signal of the refrigerator 4. When the touch button 15 is pressed, the refrigerator 4 is started. The varistor 14 is connected in series with the refrigerator 4, and the rotating disk 5 is fixedly sleeved on the outer side of the main shaft 3.

[0050] In this embodiment, the top of the transverse plate 7 is fixedly connected with an arc frame 701, and the bottom of the conical disk 6 is fixedly installed with an annular guide rail 602. The arc frame 701 is slidably sleeved on the outer side of the annular guide rail 602. The cooperation between the arc frame 701 and the annular guide rail 602 enables the transverse plate 7 and the conical disk 6 to form a rotational connection, that is, the conical disk 6 will not drive the transverse plate 7 to rotate when rotating, and when the conical disk 6 moves up and down, it can drive the transverse plate 7 to move up and down synchronously;

[0051] A touch panel 16 is fixedly mounted on one side of the connection frame 10, and the touch panel 16 is adapted to the touch button 15. The touch panel 16 can contact the touch button 15 after moving horizontally for a certain distance.

[0052] The other end of the varistor 14 is fixedly connected to a pressure plate 13, and the other side of the pressure plate 13 is fixedly connected to a compression spring 12, and the other end of the compression spring 12 is fixedly connected to the fixing frame 8, so that the pressure plate 13 is reset and positioned in the initial state by the compression spring 12, and the cross plate 7 is slidably sleeved on the outer side of the corresponding fixing frame 8, thereby guiding the up and down movement of the cross plate 7.

[0053] In this embodiment, a plurality of slide grooves 501 are formed at the bottom of the rotating disk 5, and limit strips are integrally formed on the inner walls of the front and rear sides of the slide grooves 501. The linkage plate 18 is slidably connected in the corresponding slide grooves 501, and limit grooves adapted to the limit strips are formed on the front and rear sides of the linkage plate 18, so that the slide grooves 501 and the limit strips cooperate to guide the linkage plate 18, so that the linkage plate 18 can slide stably in the rotating disk 5; a plurality of T-shaped protrusions 601 are integrally formed on the top of the conical disk 6, and the linkage plate 18 is slidably sleeved on the outer sides of the corresponding T-shaped protrusions 601, so that the linkage plate 18 and the conical disk 6 can slide stably together;

[0054] An L-shaped guide rod 19 is fixedly connected to the interior of the conical disk 6 , and the rotating disk 5 is slidably sleeved on the outer side of the L-shaped guide rod 19 , thereby realizing movement and guidance between the conical disk 6 and the rotating disk 5 .

[0055] In this embodiment, connecting springs 502 are fixedly connected to both the front and rear sides of the bottom of the rotating disk 5, and the bottom end of the connecting spring 502 is fixedly connected to the conical disk 6, thereby achieving a reset effect between the rotating disk 5 and the conical disk 6.

[0056] In this embodiment, a water inlet 101 and a water outlet 102 are respectively provided on both sides of the pump housing 1 to facilitate the introduction and discharge of hot water, and a water inlet flange 103 and a water outlet flange 104 are respectively fixedly installed on both sides of the pump housing 1 to facilitate the docking of the inlet and outlet pipes;

[0057] A water outlet hole 106 is opened on one side of the pump housing 1, one end of the water outlet hole 106 is connected to the outlet hole 302, and the other end of the water outlet hole 106 is connected to the elbow 20, and the other end of the elbow 20 extends to the water outlet 102, so that the water flowing through the main shaft 3 returns to the pump housing 1.

[0058] In this embodiment, a locating bearing 205 and a sealing bearing 206 are provided inside the motor housing 2, and the inner rings of the locating bearing 205 and the sealing bearing 206 are fixedly sleeved on the outer side of the main shaft 3. The rotational positioning of the main shaft 3 is achieved by the locating bearing 205 and the sealing bearing 206, and the sealing bearing 206 can achieve a sealing effect on the main shaft 3.

[0059] In this embodiment, a plurality of supporting ribs 22 are fixedly installed at the bottom of the pump housing 1, and the supporting ribs 22 can realize the reinforcement of the pump housing 1 as a whole. The bottoms of the plurality of supporting ribs 22 are fixedly connected to the same base 21, and the four corners of the bottom of the base 21 are provided with assembly holes to facilitate stable support and fixed installation of the pump housing 1;

[0060] A plurality of cooling fins 201 are fixedly installed on the outside of the motor housing 2. The cooling fins 201 are made of aluminum alloy. Aluminum alloy has excellent thermal conductivity, light weight, and easy processing characteristics to meet the heat dissipation requirements. Aluminum alloy also has the characteristics of low density and low price, making it very popular in heat dissipation design. Through complex processing techniques, such as extrusion, cutting, grooving, grinding, etc., efficient cooling fins can be produced. The motor housing 2 is further fixedly connected with a plurality of support frames 202, and the support frames 202 are fixedly connected to the top of the pump housing 1 to achieve a stable connection between the motor housing 2 and the pump housing 1.

[0061] In this embodiment, when in use, the water inlet flange 103 and the water outlet flange 104 are connected to the water supply pipe and the drainage pipe respectively, so that water enters the pump housing 1 through the water inlet 101, and the stator 203 generates a rotating magnetic field after being energized, thereby driving the rotor 204 to rotate, thereby driving the main shaft 3 to rotate, and the main shaft 3 drives the impeller 17 to rotate. When the impeller 17 rotates, the water is affected by the centrifugal force and is thrown to the periphery of the impeller 17 and discharged from the water outlet 102, thereby realizing the circulation of water.

[0062] The main shaft 3 drives the spiral blade 301 inside to rotate. The spiral blade 301 generates an upward thrust during the rotation process, so that a negative pressure is generated at the inner bottom of the cavity, so that the water inside the pump housing 1 enters the inner bottom of the cavity through the water inlet hole 105 and the introduction hole 303, and then moves upward under the rotation and conveying action of the spiral blade 301, and then re-enters the water outlet 102 of the water pump along the outlet hole 302, the water outlet hole 106 and the elbow 20. When the water flows through the inside of the main shaft 3, the heat can be taken away, so as to achieve a circulating cooling effect on the inside of the motor housing 2, thereby avoiding overheating inside the motor housing 2, and the heat of the rotor 204 and the main shaft 3 can be used to heat the water to achieve heat utilization;

[0063] The rotation speed of the rotor 204 and the main shaft 3 is adjusted by changing the frequency of the power supply of the motor stator 203, thereby adjusting the water delivery speed. The main shaft 3 drives the rotating disk 5 to rotate while rotating, and the rotating disk 5 drives the linkage plate 18 and the cone plate 6 to rotate synchronously. The multiple linkage plates 18 move away from each other under the action of centrifugal force, and cannot drive the cone plate 6 to move downward by cooperating with the T-shaped protrusion 601, and stretch the connecting spring 502. The cone plate 6 drives the horizontal plate 7 to move upward through the cooperation of the annular guide rail 602 and the arc frame 701. When the spindle 3 rotates downward, the horizontal plate 7 drives the two connecting frames 10 to move away from each other through the arc connecting rod 11. When the rotation speed of the spindle 3 is higher, the centrifugal force of the linkage plate 18 is higher, so that the horizontal plate 7 moves downward by a larger distance, and the distance between the two connecting frames 10 is larger. When the rotation speed of the spindle 3 is high enough, the connecting frame 10 moves so that the touch panel 16 contacts the touch button 15, thereby controlling the refrigerator 4 to turn on, and cooling the water flowing through the water inlet hole 105 through the cooling column 401. The cooled water flows through the spindle 3, thereby improving the cooling effect on the spindle 3.

[0064] When the speed of the spindle 3 continues to increase, the two touch panels 16 push the two touch buttons 15 to drive the two slide frames 9 away from each other, and cause the pressure plate 13 to squeeze the compression spring 12, while increasing the pressure on the varistor 14 and reducing the resistance of the varistor 14 itself. Since the varistor 14 is connected in series with the refrigerator 4, the power of the refrigerator 4 is increased to enhance the cooling effect on the water in the water inlet hole 105, thereby enhancing the cooling effect as the speed of the spindle 3 increases to avoid overheating.

[0065] The above is a detailed introduction to a cooling structure for a hot water circulation pump provided by the present invention. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A cooling structure for a hot water circulation pump, characterized in that: include: A pump casing (1), wherein an impeller (17) is rotatably mounted in the pump casing (1); A motor housing (2), wherein a stator (203) and a rotor (204) are arranged inside the motor housing (2), and the stator (203) is fixedly mounted inside the motor housing (2); A main shaft (3), the bottom end of the main shaft (3) is fixedly connected to the impeller (17), and the main shaft (3) is fixedly connected to the rotor (204), a cavity is provided inside the main shaft (3), a spiral blade (301) is provided inside the cavity, and a plurality of inlet holes (303) and a plurality of outlet holes (302) are provided on the outside of the main shaft (3), and a water inlet hole (105) is provided inside the pump housing (1), and one end of the water inlet hole (105) is connected to the inlet hole (303); A refrigerator (4), the refrigerator (4) being movably plugged into one side of the pump housing (1), and a plurality of refrigeration columns (401) being connected to a refrigeration end of the refrigerator (4), and the other ends of the plurality of refrigeration columns (401) all extending into the water inlet hole (105); A linkage mechanism, the linkage mechanism comprising a rotating disk (5), a conical disk (6), two transverse plates (7) and two fixed frames (8), a plurality of linkage plates (18) are slidably connected between the rotating disk (5) and the conical disk (6), the fixed frame (8) is fixedly mounted on the top of the pump housing (1), and a sliding frame (9) and a connecting frame (10) are slidably sleeved on the outer side of the fixed frame (8), and the front and rear sides of the connecting frame (10) are rotatably connected to arc-shaped connecting rods (11), The top end of the arc-shaped connecting rod (11) is rotatably connected to the outer side of the corresponding horizontal plate (7), and the two sides of the sliding frame (9) are respectively fixedly connected with a touch button (15) and a piezoresistor (14), the touch button (15) is connected to the refrigerator (4) by signal, and the touch button (15) controls the refrigerator (4) to start after being pressed, the piezoresistor (14) is connected in series with the refrigerator (4), and the rotating disk (5) is fixedly sleeved on the outer side of the main shaft (3).

2. A cooling structure for a hot water circulation pump according to claim 1, characterized in that: The top of the horizontal plate (7) is fixedly connected with an arc frame (701), the bottom of the conical plate (6) is fixedly installed with an annular guide rail (602), and the arc frame (701) is slidably sleeved on the outer side of the annular guide rail (602); A touch panel (16) is fixedly mounted on one side of the connection frame (10), and the touch panel (16) is adapted to the touch button (15); The other end of the varistor (14) is fixedly connected to a pressure plate (13), the other side of the pressure plate (13) is fixedly connected to a compression spring (12), the other end of the compression spring (12) is fixedly connected to the fixing frame (8), and the transverse plate (7) is slidably sleeved on the outer side of the corresponding fixing frame (8).

3. A cooling structure for a hot water circulation pump according to claim 1, characterized in that: A plurality of slide grooves (501) are provided at the bottom of the rotating disk (5), and limit strips are integrally formed on the inner walls of the front and rear sides of the slide grooves (501), and the linkage plate (18) is slidably connected in the corresponding slide grooves (501), and limit grooves adapted to the limit strips are provided on the front and rear sides of the linkage plate (18); The top of the conical disk (6) is integrally formed with a plurality of T-shaped protrusions (601), and the linkage plate (18) is slidably sleeved on the outer sides of the corresponding T-shaped protrusions (601); An L-shaped guide rod (19) is fixedly connected to the interior of the conical disk (6), and the rotating disk (5) is slidably sleeved on the outer side of the L-shaped guide rod (19).

4. A cooling structure for a hot water circulation pump according to claim 1, characterized in that: The front and rear sides of the bottom of the rotating disk (5) are both fixedly connected with connecting springs (502), and the bottom end of the connecting spring (502) is fixedly connected to the conical disk (6).

5. A cooling structure for a hot water circulation pump according to claim 1, characterized in that: A water inlet (101) and a water outlet (102) are respectively provided on both sides of the pump housing (1), and a water inlet flange (103) and a water outlet flange (104) are respectively fixedly installed on both sides of the pump housing (1); A water outlet hole (106) is provided on one side of the pump housing (1), one end of the water outlet hole (106) is connected to the outlet hole (302), the other end of the water outlet hole (106) is connected to a curved pipe (20), and the other end of the curved pipe (20) extends into the water outlet (102).

6. A cooling structure for a hot water circulation pump according to claim 1, characterized in that: A locating bearing (205) and a sealing bearing (206) are provided inside the motor housing (2), and the inner rings of the locating bearing (205) and the sealing bearing (206) are both fixedly sleeved on the outer side of the main shaft (3).

7. A cooling structure for a hot water circulation pump according to claim 1, characterized in that: A plurality of supporting ribs (22) are fixedly mounted on the bottom of the pump housing (1), and the bottoms of the plurality of supporting ribs (22) are fixedly connected to the same base (21).

8. A cooling structure for a hot water circulation pump according to claim 1, characterized in that: A plurality of heat dissipation fins (201) are fixedly mounted on the outer side of the motor housing (2), and the motor housing (2) is further fixedly connected with a plurality of support frames (202), wherein the support frames (202) are fixedly connected to the top of the pump housing (1).

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