A split heat pump unit for district energy transmission

Abstract

The present invention relates to a split heat pump unit for district energy transmission, which comprises a support base. A protective cover is fixedly installed on the top of the support base. A bracket is arranged inside the protective cover. A compressor is fixedly installed on the top of the bracket. An evaporator and a heating mechanism are respectively arranged on both sides of the bracket. The input end of the compressor is communicated with the output end of the evaporator; The extending end of the first cylinder is in the longest state, and the first piston blocks the output end of the connecting pipe. Cleaning agent is injected into the heat exchange box. The cleaning agent is mixed with the clear water in the heat exchange box to form a cleaning solution, which soaks the first heat exchange pipe and the second heat exchange pipe, facilitating the removal of a small amount of scale on the surface of the second heat exchange pipe. Then, the extending end of the second cylinder is controlled to contract to half of its length, and the through hole is blocked by the first sealing plug. Then, cleaning agent and clear water are injected into the heat exchange box to obtain a cleaning solution with a higher concentration, which soaks the first heat exchange pipe. The thick scale on the surface of the first heat exchange pipe is soaked twice, facilitating its efficient removal.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump units, and specifically to a split heat pump unit for regional energy transmission. Background Art

[0002] The regional energy heat pump unit is an important part of the regional energy system. It uses heat pump technology to extract low-grade heat energy from the natural environment, and realizes energy conversion through a compressor and a refrigerant, providing heating, cooling, hot water and other services for the regional building complex. Its working principle is based on the thermodynamic cycle principle. The circulating working substance (such as refrigerant) absorbs heat at the low-temperature heat source and releases heat at the high-temperature heat source through the processes of compression and expansion, realizing the transfer of heat;

[0003] When the existing heat pump unit is in use, it is necessary to regularly clean the heat exchange tubes in the heat exchange box with a cleaning liquid. Since the heat exchange tubes located at the top of the inner cavity of the heat exchange box have a relatively high temperature, thick water scale is likely to adhere to their outer walls. Generally, the concentration of the cleaning liquid injected into the heat exchange box is relatively low, and it is impossible to efficiently remove the water scale on the surface of the heat exchange tubes at the top of the inner cavity of the heat exchange box, affecting the heat exchange efficiency of the heat exchange box; at the same time, when the external environment is relatively humid, during the process of passing through the evaporator, frost is likely to form on the surface of the evaporator, which is likely to affect the normal working efficiency of the evaporator. Summary of the Invention

[0004] The technical problems solved by this solution are as follows:

[0005] (1) How to solve the problem that the concentration of the cleaning liquid injected into the heat exchange box is relatively low, and it is impossible to efficiently remove the water scale on the surface of the heat exchange tubes at the top of the inner cavity of the heat exchange box, affecting the heat exchange efficiency of the heat exchange box;

[0006] (2) How to solve the problem that when the external environment is relatively humid, during the process of passing through the evaporator, frost is likely to form on the surface of the evaporator, which is likely to affect the normal working efficiency of the evaporator.

[0007] The object of the present invention can be achieved by the following technical solutions: A split heat pump unit for regional energy transmission, including a support base, a protective cover is fixedly installed on the top of the support base, a bracket is arranged inside the protective cover, a compressor is fixedly installed on the top of the bracket, and an evaporator and a heating mechanism are respectively arranged on both sides of the bracket. The input end of the compressor is communicated with the output end of the evaporator;

[0008] The heating mechanism includes a heat exchange box fixedly connected to the support base. A liquid inlet pipe is fixedly inserted into the top of the heat exchange box. The input end of the liquid inlet pipe is communicated with the output end of the compressor. A partition is fixedly installed inside the heat exchange box. A through hole is opened in the middle of the partition. And an anti-backflow unit is arranged below the partition. A sewage discharge unit is arranged on the side of the heat exchange box.

[0009] A further technical improvement of the present invention lies in that: a first heat exchange tube is fixedly inserted on the partition plate on one side of the through hole. The input end of the first heat exchange tube is communicated with the output end of the liquid inlet pipe, and the output end of the first heat exchange tube is communicated with a second heat exchange tube. The output end of the second heat exchange tube penetrates out of the heat exchange box.

[0010] A further technical improvement of the present invention lies in that: a transmission rod is rotatably arranged on the side surface of the heat exchange box facing the bracket. A hot water pipe is communicated with the side surface of the heat exchange box away from the bracket. An inlet pipe is communicated with the top of the heat exchange box. The top end of the inlet pipe penetrates through the protective cover, and a control valve is fixedly installed in the middle of the inlet pipe.

[0011] A further technical improvement of the present invention lies in that: the sewage discharge unit includes a cold water pipe communicated with the bottom of the heat exchange box. An L-shaped pipe and a connecting pipe are respectively communicated with the middle part of the cold water pipe. The L-shaped pipe is located above the connecting pipe. A one-way valve is fixedly installed at the end of the cold water pipe away from the heat exchange box. The opening direction of the one-way valve is the same as the direction of external cold water entering the heat exchange box. A filter screen is fixedly installed on the inner wall of the middle part of the cold water pipe. The position of the filter screen corresponds to the position of the output end of the L-shaped pipe, and the filter screen is arranged close to the heat exchange box.

[0012] A further technical improvement of the present invention lies in that: the output end of the connecting pipe is communicated with a horizontally arranged sewage discharge pipe. A first cylinder is fixedly installed at the bottom of the support seat. The extending end of the first cylinder penetrates through the sewage discharge pipe, and a first piston for blocking the output end of the connecting pipe is fixedly installed at the extending end of the first cylinder.

[0013] A further technical improvement of the present invention lies in that: a first sealing plug is arranged on the top of the partition plate. The position of the first sealing plug corresponds to the position of the through hole. A first fixing rod and a second fixing rod are respectively fixedly connected to both sides of the first sealing plug. One end of the first fixing rod is fixedly connected with a second piston. The second piston is slidably connected with the inner wall of the L-shaped pipe. A horizontally arranged second cylinder is fixedly installed in the middle of the bracket. The extending end of the second cylinder is slidably connected with the middle part of the transmission rod through a dial rod. One end of the second fixing rod movably penetrates through the heat exchange box and is fixedly connected with the extending end of the second cylinder.

[0014] A further technical improvement of the present invention lies in that: the anti-backflow unit includes a blocking rod movably inserted at the bottom of the side of the heat exchange box. The blocking rod is horizontally arranged, and a second sealing plug for blocking the cold water pipe is fixedly installed at one end of the blocking rod. The other end of the blocking rod is movably connected to the bottom of the transmission rod. When the extending end of the first cylinder is in the longest state, the first piston blocks the output end of the connecting pipe. Open the control valve, and inject the cleaning agent into the heat exchange box through the feed pipe. The cleaning agent is mixed with the clear water in the heat exchange box to form a cleaning solution, which soaks the first heat exchange pipe and the second heat exchange pipe, facilitating the removal of a small amount of scale on the surface of the second heat exchange pipe. After soaking for a period of time, control the extending end of the first cylinder to contract to the shortest, and the first piston is separated from the output end of the connecting pipe, so that the sewage carrying small particle scale in the heat exchange box passes through the filter screen and the connecting pipe and is discharged through the sewage discharge pipe. During the process of the sewage passing through the filter screen, it is convenient to wash away the blockage accumulated on the filter screen, extending the working time of the filter screen. Then control the extending end of the second cylinder to contract to half of its length, the lever contacts the transmission rod, and the through hole is blocked by the first sealing plug. At this time, the second piston is still located in the L-shaped pipe. Then inject the cleaning agent and clear water into the heat exchange box through the feed pipe to obtain a cleaning solution with a higher concentration, which soaks the first heat exchange pipe, so that the thick scale on the surface of the first heat exchange pipe is soaked twice, facilitating its efficient removal. A first baffle is fixedly installed at the end of the blocking rod far from the second sealing plug, and a first thrust spring is elastically arranged between the first baffle and the heat exchange box.

[0015] A further technical improvement of the present invention lies in that: above the compressor, there is a drying mechanism for cleaning the frost on the surface of the evaporator. The drying mechanism includes an L-shaped turning frame rotatably connected to the top of the evaporator through a rotating seat. One end of the L-shaped turning frame is fixedly connected with a U-shaped electric heating plate, and the position of the U-shaped electric heating plate corresponds to the position of the liquid inlet pipe.

[0016] A further technical improvement of the present invention is that: two guide frames are fixedly installed on the inner wall of the protective cover, and a push-pull rod is movably inserted on the inner walls of the two guide frames. One end of the push-pull rod is rotatably connected to a roller, and the roller is rollingly connected to the top of the transmission rod, and the other end of the push-pull rod is movably connected to the middle part of the L-shaped flip frame; the air intake fan is in an open state, the extended end of the second cylinder is in a longest state, the first sealing plug is staggered with the through hole, and the cold water pipe and the second sealing plug are also staggered, and the high-temperature and high-pressure gas is passed through the inlet through the compressor. The liquid pipe is injected into the first heat exchange tube. At this time, the end of the liquid inlet pipe close to the compressor is located in the U-shaped electric heating plate. The U-shaped electric heating plate is turned on to heat the liquid inlet pipe to reduce the high-temperature and high-pressure gas in the liquid inlet pipe, and the heat loss occurs in the process of entering the first heat exchange tube; when the transmission rod flips, it drives the push-pull rod to move horizontally, so that the L-shaped flip frame flips, driving the U-shaped electric heating plate to rotate to the top of the evaporator, and the air intake fan cooperates with the U-shaped electric heating plate to generate a hot air flow through the evaporator, which is convenient for cleaning the frost on the surface of the evaporator to avoid affecting the normal working efficiency of the evaporator.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] When the present invention is in use, the extended end of the first cylinder is in the longest state, the first piston blocks the output end of the connecting pipe, the control valve is opened, and the cleaning agent is injected into the heat exchange box through the feed pipe. The cleaning agent and the clean water in the heat exchange box are mixed into a cleaning liquid, which is used to soak the first heat exchange tube and the second heat exchange tube, so as to remove a small amount of scale on the surface of the second heat exchange tube. After soaking for a period of time, the extended end of the first cylinder is controlled to shrink to the shortest, and the first piston is separated from the output end of the connecting pipe, so that the sewage carrying small particles of scale in the heat exchange box passes through the filter screen and the connecting pipe and is discharged through the sewage pipe. In the process of the sewage passing through the filter screen, the blockage accumulated on the filter screen is washed away, and the working time of the filter screen is extended. Then the extended end of the second cylinder is controlled to shrink to half the length, the lever contacts the transmission rod, and the through hole is blocked by the first sealing plug. At this time, the second piston is still located in the L-shaped tube, and the cleaning agent and clean water are injected into the heat exchange box through the feed pipe to obtain a cleaning liquid with a higher concentration, and the first heat exchange tube is soaked, so that the thick scale on the surface of the first heat exchange tube is soaked twice, so that it is convenient to remove it efficiently.

[0019] When the present invention is in use, the air intake fan is in an on state, the extended end of the second cylinder is in a longest state, the first sealing plug and the through hole are staggered, the cold water pipe and the second sealing plug are also staggered, and the high-temperature and high-pressure gas is injected into the first heat exchange tube through the liquid inlet pipe by the compressor. At this time, the end of the liquid inlet pipe close to the compressor is located in the U-shaped electric heating plate. The U-shaped electric heating plate is turned on to heat the liquid inlet pipe, thereby reducing the heat loss of the high-temperature and high-pressure gas in the liquid inlet pipe during the process of entering the first heat exchange tube; and when the transmission rod is flipped, it drives the push-pull rod to move horizontally, so that the L-shaped flip frame flips, driving the U-shaped electric heating plate to rotate to the top of the evaporator, and the air intake fan cooperates with the U-shaped electric heating plate to generate a hot air flow through the evaporator, which is convenient for cleaning the frost on the surface of the evaporator and avoiding affecting the normal working efficiency of the evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the heating mechanism of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the sewage discharge unit of the present invention;

[0025] Figure 5 It is a three-dimensional schematic diagram of the sewage discharge unit structure of the present invention;

[0026] Figure 6 The local structure of the heating mechanism of the present invention is shown in FIG. Figure 1 ;

[0027] Figure 7 The local structure of the heating mechanism of the present invention is shown in FIG. Figure 2 ;

[0028] Figure 8 It is a structural schematic diagram of the drying mechanism of the present invention;

[0029] Figure 9 It is a three-dimensional schematic diagram of the local structure of the drying mechanism of the present invention.

[0030] In the figure: 1, intake fan; 2, protective cover; 3, support base; 4, control valve; 5, feed pipe; 6, heating mechanism; 7, liquid inlet pipe; 8, drying mechanism; 9, evaporator; 10, compressor; 11, bracket; 12, air outlet; 13, liquid return pipe; 14, expansion valve; 601, heat exchange box; 602, first heat exchange pipe; 603, second cylinder; 604, transmission rod; 605, first baffle; 606, blocking rod; 607, second sealing plug; 608, sewage discharge unit; 609, second heat exchange pipe; 610, hot water pipe; 611, first sealing plug; 612, second fixing rod; 613, lever; 614, through hole; 615, partition board; 616, second piston; 617, first fixing rod; 6081, filter screen; 6082, first cylinder; 6083, first piston; 6084, sewage discharge pipe; 6085, connecting pipe; 6086, cold water pipe; 6087, L-shaped pipe; 801, U-shaped electric heating plate; 802, second baffle; 803, guide frame; 804, push-pull rod; 805, L-shaped turning frame; 806, rotating seat. Detailed implementation manners

[0031] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1 - 9 As shown, a split heat pump unit for regional energy transmission includes a support base 3. A protective cover 2 is fixedly installed on the top of the support base 3. A bracket 11 is arranged inside the protective cover 2. A compressor 10 is fixedly installed on the top of the bracket 11. An evaporator 9 and a heating mechanism 6 are respectively arranged on both sides of the bracket 11. The input end of the compressor 10 is communicated with the output end of the evaporator 9.

[0033] Please refer to Figure 2 and Figure 3 As shown, the above-mentioned heating mechanism 6 includes a heat exchange box 601 fixedly connected to the support base 3. A liquid inlet pipe 7 is fixedly inserted into the top of the heat exchange box 601. The input end of the liquid inlet pipe 7 is communicated with the output end of the compressor 10. A partition board 615 is fixedly installed inside the heat exchange box 601. A through hole 614 is opened in the middle of the partition board 615. An anti-backflow unit is arranged below the partition board 615. A sewage discharge unit 608 is arranged on the side of the heat exchange box 601.

[0034] Please refer to Figure 3As shown, a first heat exchange tube 602 is fixedly inserted on a partition plate 615 on one side of the through hole 614. The input end of the first heat exchange tube 602 is communicated with the output end of the liquid inlet pipe 7, and the output end of the first heat exchange tube 602 is communicated with a second heat exchange tube 609. The output end of the second heat exchange tube 609 penetrates out of the heat exchange box 601.

[0035] Please refer to Figure 3 As shown, a transmission rod 604 is rotatably arranged on the side surface of the heat exchange box 601 facing the support 11. A hot water pipe 610 is communicated with the side surface of the heat exchange box 601 away from the support 11. A feed pipe 5 is communicated with the top of the heat exchange box 601. The top end of the feed pipe 5 penetrates through the protective cover 2, and a control valve 4 is fixedly installed in the middle of the feed pipe 5.

[0036] Please refer to Figures 3 - 5 As shown, the sewage discharge unit 608 includes a cold water pipe 6086 communicated with the bottom of the heat exchange box 601. An L-shaped pipe 6087 and a connecting pipe 6085 are respectively communicated with the middle of the cold water pipe 6086. The L-shaped pipe 6087 is located above the connecting pipe 6085. A one-way valve is fixedly installed at the end of the cold water pipe 6086 away from the heat exchange box 601. The opening direction of the one-way valve is the same as the direction of external cold water entering the heat exchange box 601.

[0037] Please refer to Figure 3 and Figure 4 As shown, a filter screen 6081 is fixedly installed on the inner wall of the middle part of the cold water pipe 6086. The position of the filter screen 6081 corresponds to the position of the output end of the L-shaped pipe 6087, and the filter screen 6081 is arranged close to the heat exchange box 601.

[0038] Please refer to Figures 2 - 4 As shown, the output end of the connecting pipe 6085 is communicated with a horizontally arranged sewage discharge pipe 6084. A first cylinder 6082 is fixedly installed at the bottom of the support seat 3. The extending end of the first cylinder 6082 penetrates through the sewage discharge pipe 6084, and a first piston 6083 for blocking the output end of the connecting pipe 6085 is fixedly installed at the extending end of the first cylinder 6082.

[0039] Please refer to Figure 2 and Figure 6 As shown, a first sealing plug 611 is arranged on the top of the partition plate 615. The position of the first sealing plug 611 corresponds to the position of the through hole 614. A first fixing rod 617 and a second fixing rod 612 are respectively fixedly connected to both sides of the first sealing plug 611. One end of the first fixing rod 617 is fixedly connected to a second piston 616. The second piston 616 is slidably connected to the inner wall of the L-shaped pipe 6087.

[0040] Please refer to Figure 2 、 Figure 6 and Figure 7As shown, a horizontally arranged second cylinder 603 is fixedly installed in the middle of the above-mentioned bracket 11. The extending end of the second cylinder 603 is slidably connected to the middle of the transmission rod 604 through a lever 613. One end of the second fixing rod 612 movably passes through the heat exchange box 601 and is fixedly connected to the extending end of the second cylinder 603.

[0041] Please refer to Figure 3 As shown, the above-mentioned anti-backflow unit includes a blocking rod 606 movably inserted at the bottom of the side of the heat exchange box 601. The blocking rod 606 is horizontally arranged, and a second sealing plug 607 for blocking the cold water pipe 6086 is fixedly installed at one end of the blocking rod 606. The other end of the blocking rod 606 is movably connected to the bottom of the transmission rod 604; when the extending end of the first cylinder 6082 is in the longest state, the first piston 6083 blocks the output end of the connecting pipe 6085, the control valve 4 is opened, and a cleaning agent is injected into the heat exchange box 601 through the feed pipe 5. The cleaning agent is mixed with the clear water in the heat exchange box 601 to form a cleaning liquid, which soaks the first heat exchange pipe 602 and the second heat exchange pipe 609, facilitating the removal of a small amount of scale on the surface of the second heat exchange pipe 609. After soaking for a period of time, the extending end of the first cylinder 6082 is controlled to contract to the shortest, and the first piston 6083 is separated from the output end of the connecting pipe 6085, so that the sewage carrying small particle scale in the heat exchange box 601 passes through the filter screen 6081 and the connecting pipe 6085 and is discharged through the sewage pipe 6084. During the process of the sewage passing through the filter screen 6081, it is convenient to wash away the blockage accumulated on the filter screen 6081, extending the working time of the filter screen 6081. Then, the extending end of the second cylinder 603 is controlled to contract to half of its length, the lever 613 contacts the transmission rod 604, and the through hole 614 is blocked by the first sealing plug 611. At this time, the second piston 616 is still located in the L-shaped pipe 6087. Then, a cleaning agent and clear water are injected into the heat exchange box 601 through the feed pipe 5 to obtain a cleaning liquid with a higher concentration, which soaks the first heat exchange pipe 602, so that the thick scale on the surface of the first heat exchange pipe 602 is soaked twice, facilitating its efficient removal.

[0042] Please refer to Figure 3 As shown, a first baffle 605 is fixedly installed at the end of the above-mentioned blocking rod 606 away from the second sealing plug 607. A first thrust spring is elastically arranged between the first baffle 605 and the heat exchange box 601.

[0043] Please refer to Figure 2 、 Figure 8 and Figure 9 As shown, above the above-mentioned compressor 10, a drying mechanism 8 for cleaning the frost on the surface of the evaporator 9 is provided. The drying mechanism 8 includes an L-shaped turning frame 805 rotatably connected to the top of the evaporator 9 through a rotating seat 806. One end of the L-shaped turning frame 805 is fixedly connected with a U-shaped electric heating plate 801, and the position of the U-shaped electric heating plate 801 corresponds to the position of the liquid inlet pipe 7.

[0044] See also Figure 8 As shown, two guide frames 803 are fixedly installed on the inner wall of the above-mentioned protective cover 2, and a push-pull rod 804 is movably inserted on the inner wall of the two guide frames 803. One end of the push-pull rod 804 is rotatably connected to a roller, and the roller is rollingly connected to the top of the transmission rod 604, and the other end of the push-pull rod 804 is movably connected to the middle part of the L-shaped flip frame 805; the air intake fan 1 is in an open state, the extended end of the second cylinder 603 is in a longest state, the first sealing plug 611 and the through hole 614 are staggered, and the cold water pipe 6086 and the second sealing plug 607 are also staggered. The high-temperature and high-pressure gas is injected into the first through the liquid inlet pipe 7 through the compressor 10. In the heat exchange tube 602, at this time, the end of the liquid inlet tube 7 close to the compressor 10 is located in the U-shaped electric heating plate 801. The U-shaped electric heating plate 801 is turned on to heat the liquid inlet tube 7, thereby reducing the high-temperature and high-pressure gas in the liquid inlet tube 7 and the heat loss in the process of entering the first heat exchange tube 602; and when the transmission rod 604 flips, it drives the push-pull rod 804 to move horizontally, so that the L-shaped flip frame 805 flips, driving the U-shaped electric heating plate 801 to rotate to the top of the evaporator 9, and the air intake fan 1 cooperates with the U-shaped electric heating plate 801 to generate a hot air flow through the evaporator 9, which is convenient for cleaning the frost on the surface of the evaporator 9 to avoid affecting the normal working efficiency of the evaporator 9.

[0045] See also Figure 8 As shown, a second baffle 802 is fixedly mounted on the push-pull rod 804 between the two guide frames 803 , a second thrust spring is arranged between the second baffle 802 and one of the guide frames 803 , and the second thrust spring is arranged close to the L-shaped flip frame 805 .

[0046] See also Figure 2 As shown, an expansion valve 14 is fixedly installed at the bottom of the above-mentioned bracket 11, the input end of the expansion valve 14 is connected to the output end of the second heat exchange tube 609, and the output end of the expansion valve 14 is connected to the return liquid pipe 13, and the output end of the return liquid pipe 13 is connected to the input end of the evaporator 9.

[0047] See also Figure 2 As shown, an air intake fan 1 is fixedly installed on the top of the protective cover 2 , and the position of the air intake fan 1 corresponds to the position of the evaporator 9 . An air outlet 12 is provided on the support base 3 below the evaporator 9 .

[0048] Working principle: When the present invention is in use, first, during the normal operation of the heat pump unit, the air intake fan 1 is in the on state, the extended end of the second cylinder 603 is in the longest state, the first sealing plug 611 and the through hole 614 are staggered, and the cold water pipe 6086 and the second sealing plug 607 are also staggered. The high-temperature and high-pressure gas is injected into the first heat exchange tube 602 through the liquid inlet pipe 7 through the compressor 10. At this time, the end of the liquid inlet pipe 7 close to the compressor 10 is located in the U-shaped electric heating plate 801. The U-shaped electric heating plate 801 is turned on to heat the liquid inlet pipe 7 to reduce the heat loss of the high-temperature and high-pressure gas in the liquid inlet pipe 7 during the process of entering the first heat exchange tube 602. In the process of cleaning the scale in the heat exchange box 601, the external water inlet device is closed so that the cold water in the cold water pipe 6086 does not flow into the heat exchange box 601. At this time, the extended end of the first cylinder 6082 is in the longest state, the first piston 6083 blocks the output end of the connecting pipe 6085, the control valve 4 is opened, and the cleaning agent is injected into the heat exchange box 601 through the feed pipe 5. The cleaning agent is mixed with the clean water in the heat exchange box 601 to form a cleaning liquid, which is used to soak the first heat exchange tube 602 and the second heat exchange tube 609 to facilitate the removal of a small amount of scale on the surface of the second heat exchange tube 609. After soaking for a period of time, the extended end of the first cylinder 6082 is controlled to shrink to the shortest, and the first piston 6083 and The output end of the connecting pipe 6085 is separated, so that the sewage carrying small particles of scale in the heat exchange box 601 passes through the filter 6081 and the connecting pipe 6085, and is discharged through the sewage pipe 6084. In the process of the sewage passing through the filter 6081, it is convenient to wash away the blockage accumulated on the filter 6081, thereby extending the working time of the filter 6081. Then, the extended end of the second cylinder 603 is controlled to shrink to half its length, and the lever 613 contacts the transmission rod 604, and the through hole 614 is blocked by the first sealing plug 611. At this time, the second piston 616 is still located in the L-shaped tube 6087, and then the cleaning agent and clean water are injected into the heat exchange box 601 through the feed pipe 5 to obtain a higher concentration. The cleaning liquid is used to soak the first heat exchange tube 602, so that the thick scale on the surface of the first heat exchange tube 602 is soaked twice, which is convenient for efficient removal. The extended end of the second cylinder 603 is continued to be controlled to shrink to the shortest, so that the second piston 616 is separated from the L-shaped tube 6087, and the first sealing plug 611 still blocks the through hole 614. Clean water is injected into the heat exchange box 601 through the feed pipe 5, and the sewage carrying large particles of scale is discharged from the sewage pipe 6084 along the L-shaped tube 6087. At the same time, the driving rod 604 is driven to flip through the lever 613, so that the blocking rod 606 drives the second sealing plug 607 to block the cold water pipe 6086 to prevent the sewage from flowing back into the heat exchange box 601;When the transmission rod 604 flips, it drives the push-pull rod 804 to move horizontally in cooperation with the roller, causing the L-shaped flipping frame 805 to flip and driving the U-shaped electric heating plate 801 to rotate above the evaporator 9. The intake fan 1 and the U-shaped electric heating plate 801 cooperate, and the generated hot air flow passes through the evaporator 9, facilitating the removal of the frost on the surface of the evaporator 9 and preventing it from affecting the normal working efficiency of the evaporator 9.;

[0049] The above are only the preferred embodiments of the present invention and do not impose any formal restrictions on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A split heat pump unit for district energy transmission, comprising a support base (3), and a protective cover (2) is fixedly installed on the top of the support base (3), characterized in that: Inside the protective cover (2), there is a bracket (11) installed. At the top of the bracket (11), a compressor (10) is fixedly installed. On both sides of the bracket (11), an evaporator (9) and a heating mechanism (6) are respectively arranged. The input end of the compressor (10) is communicated with the output end of the evaporator (9). The heating mechanism (6) includes a heat exchange box (601) fixedly connected to the support base (3). An inlet liquid pipe (7) is inserted into the top of the heat exchange box (601). The input end of the inlet liquid pipe (7) is communicated with the output end of the compressor (10). Inside the heat exchange box (601), a partition plate (615) is fixedly installed. A through hole (614) is opened in the middle of the partition plate (615). And a backflow prevention unit is arranged below the partition plate (615). A sewage discharge unit (608) is arranged on the side of the heat exchange box (601). At the top of the partition plate (615), a first sealing plug (611) is arranged. The position of the first sealing plug (611) corresponds to the position of the through hole (614). On both sides of the first sealing plug (611), a first fixing rod (617) and a second fixing rod (612) are respectively fixedly connected. One end of the first fixing rod (617) is fixedly connected with a second piston (616). The second piston (616) is slidably connected to the inner wall of the L-shaped pipe (6087). In the middle of the bracket (11), a second cylinder (603) is fixedly installed. The extending end of the second cylinder (603) is slidably connected to the middle of a transmission rod (604) through a lever (613). One end of the second fixing rod (612) movably penetrates through the heat exchange box (601) and is fixedly connected to the extending end of the second cylinder (603). Above the compressor (10), a drying mechanism (8) for cleaning the frost on the surface of the evaporator (9) is arranged. The drying mechanism (8) includes an L-shaped turning frame (805) rotatably connected to the top of the evaporator (9). One end of the L-shaped turning frame (805) is fixedly connected with a U-shaped electric heating plate (801). The position of the U-shaped electric heating plate (801) corresponds to the position of the inlet liquid pipe (7). On the inner wall of the protective cover (2), two guiding frames (803) are fixedly installed. A push-pull rod (804) is movably inserted into the inner walls of the two guiding frames (803). One end of the push-pull rod (804) is rotatably connected with a roller. The roller is in rolling connection with the top of the transmission rod (604). The other end of the push-pull rod (804) is movably connected to the middle of the L-shaped turning frame (805).

2. The split heat pump unit for regional energy transmission according to claim 1, characterized in that, On the partition plate (615) on one side of the through hole (614), a first heat exchange pipe (602) is fixedly inserted. The input end of the first heat exchange pipe (602) is communicated with the output end of the inlet liquid pipe (7). And the output end of the first heat exchange pipe (602) is communicated with a second heat exchange pipe (609). The output end of the second heat exchange pipe (609) penetrates out of the heat exchange box (601).

3. The split heat pump unit for regional energy transmission according to claim 1, characterized in that, A transmission rod (604) is rotatably arranged on the side of the heat exchange box (601) facing the support (11). A hot water pipe (610) is communicated with the side of the heat exchange box (601) away from the support (11), and a feed pipe (5) is communicated with the top of the heat exchange box (601). The top end of the feed pipe (5) penetrates through the protective cover (2), and a control valve (4) is fixedly installed in the middle of the feed pipe (5).

4. The split heat pump unit for district energy transmission according to claim 1, characterized in that The sewage discharge unit (608) includes a cold water pipe (6086) communicated with the bottom of the heat exchange box (601). An L-shaped pipe (6087) and a connecting pipe (6085) are respectively communicated with the middle of the cold water pipe (6086). The L-shaped pipe (6087) is located above the connecting pipe (6085). A one-way valve is fixedly installed at the end of the cold water pipe (6086) away from the heat exchange box (601). A filter screen (6081) is fixedly installed on the inner wall of the middle part of the cold water pipe (6086), and the position of the filter screen (6081) corresponds to the position of the output end of the L-shaped pipe (6087).

5. The split heat pump unit for district energy transmission according to claim 4, characterized in that, The output end of the connecting pipe (6085) is communicated with a sewage discharge pipe (6084). A first cylinder (6082) is fixedly installed at the bottom of the support seat (3). The extending end of the first cylinder (6082) penetrates through the sewage discharge pipe (6084), and a first piston (6083) for blocking the output end of the connecting pipe (6085) is fixedly installed at the extending end of the first cylinder (6082).

6. The split heat pump unit for regional energy transmission according to claim 1, characterized in that The anti-backflow unit includes a blocking rod (606) movably inserted at the bottom of the side of the heat exchange box (601). A second sealing plug (607) for blocking the cold water pipe (6086) is fixedly installed at one end of the blocking rod (606). The other end of the blocking rod (606) is movably connected with the bottom of the transmission rod (604). A first baffle (605) is fixedly installed at the end of the blocking rod (606) away from the second sealing plug (607). A first thrust spring is elastically arranged between the first baffle (605) and the heat exchange box (601).

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