Air conditioner cold and hot change-over valve with backwashing pre-filter

Abstract

The invention relates to the technical field of air conditioner cold and hot change-over valves, in particular to an air conditioner cold and hot change-over valve with a backwashing prefilter, which comprises a cold and hot change-over valve, a main clamping assembly and an auxiliary clamping assembly arranged on the cold and hot change-over valve, and a drainage transduction mechanism arranged on the cold and hot change-over valve, and the air bin cleaning mechanism is arranged on the drainage transduction mechanism. The four drainage transduction mechanisms are installed in the four ends of the cold and hot conversion valve, and the gas bin cleaning mechanisms are arranged outside the drainage transduction mechanisms. When the air bin cleaning mechanism is closed, accumulated scales increased in the air bin cleaning mechanism can form a self-closing state due to gravity sensing and the dual action of air pressure or hydraulic pressure, and at the moment, the back-flushing cleaning mechanism can wash the closed air bin cleaning mechanism, so that it is ensured that self-cleaning can be achieved after the air bin cleaning mechanism is closed; and therefore, clogging or damage to the valve body caused by scale deposition is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of air-conditioner hot / cold conversion valves, and in particular to an air-conditioner hot / cold conversion valve with a backwashing pre-filter. Background Art

[0002] Air conditioning cooling and heating system conversion valve, control principle: by changing the flow channel of the refrigerant, changing the flow direction of the refrigerant, the functions of the condenser and evaporator of the air conditioning system in winter and summer are converted: in summer, the refrigerant liquid evaporates in the evaporator, absorbs heat and becomes gas, releases heat in the condenser, and is used for indoor cooling; in winter, the refrigerant liquid evaporates in the outdoor condenser, absorbs external heat, releases heat in the indoor evaporator, and is used for indoor heating.

[0003] However, the existing hot and cold conversion valve has the following defects during actual use: as the air conditioner is used for a longer time, after the external airflow and the refrigerant liquid circulate through the conversion valve, the dirt carried in the airflow or liquid can easily accumulate inside the valve body. In severe cases, the cooling or heating effect of the valve body will be reduced, which not only increases energy consumption, but also as the dirt continues to increase, the inside of the valve body will also be damaged under the influence of air pressure or hydraulic pressure.

[0004] In view of this, an air conditioning hot and cold switching valve with a backwash pre-filter is designed to solve the above problems. Summary of the invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technology.

[0006] To this end, the technical solution adopted in the present invention is: A hot and cold switching valve for an air conditioner with a backwash pre-filter comprises a hot and cold switching valve, a main clamping assembly and a secondary clamping assembly arranged on the hot and cold switching valve, a drainage transducer mechanism arranged on the hot and cold switching valve, an air chamber cleaning mechanism arranged on the drainage transducer mechanism, a backwash cleaning mechanism arranged on the air chamber cleaning mechanism, and an air flow pipe arranged on the air chamber cleaning mechanism; the drainage transducer mechanism comprises a guide cover installed on the hot and cold switching valve; the air chamber cleaning mechanism comprises a transfer assembly arranged on the outer end of the guide cover, a separation pad arranged in the transfer assembly, a primary filter assembly arranged in the left cavity of the transfer assembly, and a filter assembly arranged in the right cavity of the transfer assembly. A three-stage filter cover, an input pipe arranged on one side of the transfer component, an output pipe arranged on the other side of the transfer component, a drainage component arranged at the bottom of the transfer component and a linkage component arranged in the transfer component; the transfer component includes an outer shell, a bottom gasket installed on the left cavity wall of the outer shell, a top gasket installed on the right cavity wall of the outer shell and two limit rods installed at the bottom of the outer shell; the primary filter component includes an anti-overflow end movably installed in the outer shell, a primary filter cover installed at the bottom of the anti-overflow end, a protective pad installed at the bottom of the primary filter cover, a first plug arranged in the groove at the bottom of the primary filter cover and a first spring arranged outside the first plug and bearing pressure on the bottom of the primary filter cover.

[0007] In a preferred example, the present invention can be further configured as follows: the drainage transducer mechanism also includes a first clamp fixedly mounted on the top of the air deflector, a sleeve mounted on the top of the air deflector, an impeller arranged in the sleeve, a runner mounted on the impeller, a push rod movably mounted on the runner, a striker movably mounted on the other end of the push rod, and a gasket arranged on the outer wall of the housing; The striker is movably mounted inside the first fixture.

[0008] In a preferred example, the present invention can be further configured as follows: the recoil cleaning mechanism includes a waterproof cover installed on the outer notch of the housing, a liquid inlet pipe installed in the waterproof cover, a third filter pad arranged inside the liquid inlet pipe, a third plug movably installed inside the third filter pad, and a third spring arranged outside the third plug and bearing pressure on the third filter pad; A rubber gasket is arranged at the top end of the liquid inlet pipe, and the rubber gasket is adapted to fit the top end of the third plug.

[0009] In a preferred example, the present invention can be further configured as follows: the main clamping assembly includes a first clamping plate, a first clamping buckle installed on the top of the first clamping plate, and a column arranged on the outside of the first clamping plate; The top end of the first clip is fixedly mounted on the bottom of the housing.

[0010] In a preferred example, the present invention can be further configured as follows: the auxiliary clamping assembly includes a second clamping plate and a second clamping buckle arranged on the outer side of the second clamping plate.

[0011] In a preferred example, the present invention can be further configured as follows: the gas tank cleaning mechanism also includes two second clamps installed on the outer wall of the shell, and the liquid inlet pipe is fixedly installed in the two second clamps.

[0012] In a preferred example, the present invention can be further configured as follows: the drainage assembly includes a second plug movably installed in the hole at the bottom of the housing and a second spring arranged on the second plug; Uniformly distributed notches are provided in the end of the bottom of the second plug.

[0013] In a preferred example, the present invention can be further configured as follows: the linkage assembly includes a guard frame and a clamp seat fixedly installed in the inner cavity of the housing; Two symmetrically distributed sliding sleeves are movably installed on the inner side of the guard frame, a first guide wheel is arranged between the two sliding sleeves, and a first compression spring is installed at the bottom of the first guide wheel; A second guide wheel is movably mounted on the inner end of the clamp seat, and a second compression spring is mounted on the bottom of the clamp seat; A cable is arranged outside the first guide wheel and the second guide wheel, and the bottom end of the cable is installed on the top of the third-stage filter cover, and the top end of the cable is installed on the top end of the anti-overflow end.

[0014] In a preferred example, the present invention can be further configured as follows: a groove is provided on the outer side of the primary filter housing and the outer side of the tertiary filter housing, and a filter notch is provided in the two grooves; The top, middle and bottom of the separation pad are provided with filter mesh holes; A hollow through hole is provided at the bottom end of the three-stage filter cover.

[0015] In a preferred example, the present invention can be further configured as follows: the guard frame is composed of a rectangular pad and two support plates, and the inner side of the support plate is provided with a vertical groove, and the two sliding sleeves are movably installed in the two vertical grooves; The bottom end of the first compression spring is connected to the bottom of the vertical slot.

[0016] By adopting the above technical solution, the beneficial effects achieved by the present invention are: 1. The present invention installs four sets of drainage transducer mechanisms in the four ends of the hot and cold conversion valve, and arranges an air chamber cleaning mechanism outside the drainage transducer mechanism. When the gas or liquid passes through the air chamber cleaning mechanism and enters the valve body, the increased scale in the air chamber cleaning mechanism will form a self-sealing state due to the dual effects of gravity induction and air pressure or hydraulic pressure. At this time, the recoil cleaning mechanism can clean the closed air chamber cleaning mechanism, thereby ensuring that the air chamber cleaning mechanism can achieve self-cleaning after being closed, thereby avoiding clogging or damage to the valve body caused by scale.

[0017] 2. The present invention transfers and guides the gas or liquid through the drainage transducer mechanism. With the continuous input of gas or liquid, the gas or liquid will actively push the impeller. As the impeller continues to rotate, the boosted impeller will eventually push the push rod and the striker to extend regularly, thereby ensuring that the striker can impact the gasket fixed on the gas tank cleaning mechanism to improve the efficient flushing of scale by the cleaning liquid.

[0018] 3. The present invention arranges a third plug at the top of the liquid inlet pipe. After the dirt inside the gas chamber cleaning mechanism is cleaned, the gas or liquid entering through the input pipe can pass through the gas chamber cleaning mechanism smoothly, and finally enter the hot and cold switching valve from the guide cover. At the same time, the drainage component that falls due to weight will also extend due to weight during cleaning, thereby ensuring that the device can provide pre-protection for the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the present invention when used; Figure 2 It is a bottom view schematic diagram of the present invention; Figure 3 It is a schematic diagram of the main clamping assembly and the auxiliary clamping assembly of the present invention; Figure 4 It is a partial schematic diagram of the present invention; Figure 5 It is an exploded schematic diagram of the drainage transducer mechanism of the present invention; Figure 6 It is a partial explosion schematic diagram of the present invention; Figure 7 is a schematic diagram of the recoil cleaning mechanism of the present invention; Figure 8 For the present invention Figure 7 The enlarged schematic diagram of point A in the middle; Fig. 9 It is an internal schematic diagram of the gas bin cleaning mechanism of the present invention; Fig.10 For the present invention Fig. 9 Explosion diagram of Fig.11 is a schematic diagram of the primary filter assembly of the present invention; Fig.12 It is a schematic diagram of the drainage component and the linkage component of the present invention.

[0020] Reference numerals: 100. Hot and cold switching valve; 200, main clamping assembly; 210, first clamping plate; 220, first clamping buckle; 230, column; 300, auxiliary clamping assembly; 310, second clamping plate; 320, second clamping buckle; 400, drainage transducer mechanism; 410, guide cover; 420, sleeve; 430, impeller; 440, first fixture; 450, rotating wheel; 460, push rod; 470, striker; 480, cushion; 500, gas tank cleaning mechanism; 510, transfer assembly; 511, housing; 512, limit rod; 513, bottom gasket; 514, top gasket; 520, second clamp; 530, input pipe; 540, output pipe; 550, separation pad; 560, primary filter assembly; 561, anti-overflow terminal; 562, primary filter cover; 563, protective pad; 564, first plug; 565, first spring; 570, tertiary filter cover; 580, drainage assembly; 581, second plug; 582, second spring; 590, linkage assembly; 591, protective frame; 592, sliding sleeve; 593, first guide wheel; 594, first compression spring; 595, clamp seat; 596, second guide wheel; 597, cable; 598, second compression spring; 600, recoil cleaning mechanism; 610, waterproof cover; 620, liquid inlet pipe; 630, third filter pad; 640, third plug; 650, third spring; 700. Airflow pipe. DETAILED DESCRIPTION

[0021] To make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below in combination with specific implementations and with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0022] It is to be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention.

[0023] An air-conditioning hot / cold switching valve with a backwash pre-filter provided by some embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0024] Embodiment 1: Combination Figures 1 to 12As shown, the present invention provides an air conditioning hot and cold switching valve with a backwash pre-filter, comprising a hot and cold switching valve 100, a main clamping assembly 200 and a secondary clamping assembly 300 arranged on the hot and cold switching valve 100, a drainage transducer mechanism 400 arranged on the hot and cold switching valve 100, an air chamber cleaning mechanism 500 arranged on the drainage transducer mechanism 400, a backwash cleaning mechanism 600 arranged on the air chamber cleaning mechanism 500, and an air flow pipe 700 arranged on the air chamber cleaning mechanism 500, the main clamping assembly 200 It is used to provide clamping force for a group of drainage transducer mechanisms 400 at the top of the hot and cold conversion valve 100, and the three groups of auxiliary clamping components 300 are used to provide clamping force for the three groups of drainage transducer mechanisms 400 at the bottom of the hot and cold conversion valve 100. The drainage transducer mechanism 400 is used to guide gas and liquid, and use gas and liquid to provide kinetic energy for removing scale in the gas tank cleaning mechanism 500. The gas tank cleaning mechanism 500 is used to backwash and filter the gas and liquid, and the backwash cleaning mechanism 600 is used to flush the dirt in the gas tank cleaning mechanism 500.

[0025] The main clamping assembly 200 includes a first clamping plate 210, a first clamping buckle 220 installed on the top of the first clamping plate 210, and a column 230 arranged on the outside of the first clamping plate 210; The top end of the first clip 220 is fixedly mounted on the bottom of the housing 511; The auxiliary clamping assembly 300 includes a second clamping plate 310 and a second clamping buckle 320 disposed outside the second clamping plate 310; The flow conversion mechanism 400 includes a flow guide cover 410 installed on the hot / cold conversion valve 100; The gas tank cleaning mechanism 500 includes a transfer assembly 510 disposed on the outer end of the guide cover 410, a separation pad 550 disposed in the transfer assembly 510, a primary filter assembly 560 disposed in the left cavity of the transfer assembly 510, a tertiary filter cover 570 disposed in the right cavity of the transfer assembly 510, an input pipe 530 disposed on one side of the transfer assembly 510, an output pipe 540 disposed on the other side of the transfer assembly 510, a drainage assembly 580 disposed at the bottom of the transfer assembly 510, and a linkage assembly 590 disposed in the transfer assembly 510; The transfer assembly 510 includes a housing 511, a bottom gasket 513 installed on the left cavity wall of the housing 511, a top gasket 514 installed on the right cavity wall of the housing 511, and two limit rods 512 installed at the bottom of the housing 511; Two second clamps 520 are mounted on the outer wall of the housing 511, and the liquid inlet pipe 620 is fixedly mounted in the two second clamps 520; The primary filter assembly 560 includes an anti-overflow end 561 movably installed within the housing 511, a primary filter cover 562 installed at the bottom end of the anti-overflow end 561, a gasket 563 installed at the bottom end of the primary filter cover 562, a first plug 564 disposed in the bottom slot of the primary filter cover 562, and a first spring 565 disposed outside the first plug 564 and pressing against the bottom of the primary filter cover 562; Grooves are provided on the outer sides of both the primary filter cover 562 and the tertiary filter cover 570, and filter slots are provided within both grooves; Filter mesh holes are provided at the top, middle, and bottom of the separator pad 550; A hollow through-hole is provided at the bottom end of the tertiary filter cover 570; The diversion assembly 580 includes a second plug 581 movably installed in the hole at the bottom of the housing 511 and a second spring 582 disposed on the second plug 581; Uniformly distributed slots are provided within the end of the bottom of the second plug 581; The backflush cleaning mechanism 600 includes a waterproof cover 610 installed on the outer slot of the housing 511, a liquid inlet pipe 620 installed within the waterproof cover 610, a third filter pad 630 disposed inside the liquid inlet pipe 620, a third plug 640 movably installed inside the third filter pad 630, and a third spring 650 disposed outside the third plug 640 and pressing against the third filter pad 630; A rubber gasket is provided at the top end of the liquid inlet pipe 620, and the rubber gasket is fitted and adhered to the top end of the third plug 640.

[0026] When the air flow pipe 700 transfers gas or liquid into the input pipe 530, ultimately the gas or liquid will enter the interior of the housing 511 and the primary filter cover 562 from the input pipe 530. At this time, the gas or liquid will be initially filtered by the primary filter cover 562, and the filtered gas or liquid will be output from the filter holes at the top of the primary filter cover 562 and enter the cavity on the right side of the housing 511 through the mesh holes at the top of the separator pad 550. With the continuous injection of gas and liquid, it will ultimately flow back along the mesh holes in the middle of the separator pad 550, and the gas or liquid after the backflow can flow into the tertiary filter cover 570 through the mesh holes at the bottom of the separator pad 550. At this time, the gas or liquid entering the inner cavity of the tertiary filter cover 570 will flow from the tertiary filter cover 570 into the output pipe 540; When gas or liquid is input into the interior of the guide cover 410 from the output pipe 540, the gas or liquid will push the impeller 430 to rotate, and the rotor 450 installed on the impeller 430 will assist the push rod 460 and the striker 470 to extend back and forth. At this time, the striker 470 constrained by the first clamp 440 will knock the gasket 480 fixed on the outer wall of the outer shell 511. After the outer shell 511 is knocked, the cleaning liquid input into the waterproof cover 610 through the liquid inlet pipe 620 can flush the scale in the inner cavity of the outer shell 511, and the waste liquid after flushing will overflow from the exposed gap between the second plug 581 and the outer shell 511, thereby extending the service life of the hot and cold switching valve 100.

[0027] Embodiment 2: Combination Figure 5 and Fig.10 As shown, on the basis of Example 1, the drainage transducer mechanism 400 further includes a first clamp 440 fixedly mounted on the top of the air guide cover 410, a sleeve 420 mounted on the top of the air guide cover 410, an impeller 430 disposed in the sleeve 420, a runner 450 mounted on the impeller 430, a push rod 460 movably mounted on the runner 450, a striker 470 movably mounted on the other end of the push rod 460, and a cushion 480 disposed on the outer wall of the housing 511; The striker 470 is movably installed inside the first fixture 440 .

[0028] Preferably, the air guide cover 410 is in a T-shaped structure as a whole, and an end pipe is provided on one side of the air guide cover 410 facing the housing 511; The inner wall of the shaft sleeve 420 is provided with an anti-seepage gasket. When the gas flows into the guide cover 410 along the end pipe and is input into the hot-cold conversion valve 100, the blades of the impeller 430 are driven by the airflow or liquid and rotate. When the rotating wheel 450 is in a rotating state, the push rod 460 will obtain a constant driving force to assist the striker 470. At this time, the inner cavity of the housing 511 can be flushed by the cleaning liquid and the vibration force can be used to achieve the purpose of efficient descaling.

[0029] Embodiment 3: Combination Figures 9 to 12 As shown, based on Example 1, the linkage assembly 590 includes a guard frame 591 and a clamp seat 595 fixedly installed in the inner cavity of the housing 511; Two symmetrically distributed sliding sleeves 592 are movably mounted on the inner side of the guard frame 591 , a first guide wheel 593 disposed between the two sliding sleeves 592 , and a first compression spring 594 mounted on the bottom of the first guide wheel 593 ; A second guide wheel 596 is movably mounted on the inner end of the clamp seat 595, and a second compression spring 598 is mounted on the bottom of the clamp seat 595; A cable 597 is disposed outside the first guide wheel 593 and the second guide wheel 596, and the bottom end of the cable 597 is installed on the top of the third-stage filter cover 570, and the top of the cable 597 is installed on the top of the anti-overflow terminal 561; The guard frame 591 is composed of a rectangular pad and two support plates, and the inner side of the support plate is provided with a vertical groove, and two sliding sleeves 592 are movably installed in the two vertical grooves; The bottom end of the first compression spring 594 is connected to the bottom of the vertical slot.

[0030] Preferably, a hole is formed in the cover plate at the top of the housing 511, and the top end of the cable 597 is adapted to pass through the hole, and the guard frame 591 and the clamp seat 595 are fixed to the inner wall of the housing 511 by welding; In addition, the bottom end of the second compression spring 598 is fixedly mounted on the top of the third-stage filter cover 570, and the top end of the second compression spring 598 is fixed on the bottom of the clamping seat 595; In the initial state, the two sliding sleeves 592 assembled at both ends of the first guide wheel 593 will bear the upward elastic supporting force of the two first compression springs 594. At this time, the first guide wheel 593 will effectively tighten the cable 597 after bearing the driving force.

[0031] Working principle and use process of the present invention: The air conditioning cold and hot conversion valve 100 is an important component for switching between cooling and heating modes of the air conditioning system, which is mainly used to change the flow direction of the refrigerant and the distribution of the system pressure; When the air conditioner is in cooling mode, the refrigerant enters the indoor unit evaporator at low temperature and low pressure, absorbs indoor heat and evaporates into gas. The evaporated high temperature and high pressure gas enters the outdoor unit condenser, releases heat and condenses into liquid. The liquid refrigerant is then compressed by the compressor and circulated to complete the refrigeration cycle. When the air conditioner is in heating mode, the conversion valve switches the refrigerant flow direction, allowing the high-temperature and high-pressure gas to directly enter the indoor unit evaporator to release heat. After the indoor unit exchanges heat, the low-temperature and low-pressure refrigerant releases heat through the condenser and finally returns to the compressor to complete the cycle. However, the existing conversion valve has many defects during actual use. In order to improve the efficiency of the conversion valve and increase the service life of the conversion valve, the device is provided by assembling a drainage transducer mechanism 400 at the four gas ends of the traditional valve body, and installing an air chamber cleaning mechanism 500 on the outside of the drainage transducer mechanism 400. As the air flow pipe 700 inputs the gas or refrigerant into the input pipe 530, the air flow or refrigerant will flow along the input pipe 530 into the first-stage filter cover 562, and finally the air flow or refrigerant will be The primary filter cover 562 performs preliminary filtering and transfers the gas to the right cavity of the housing 511 through the mesh at the top of the separator 550. As the gas or refrigerant is continuously injected into the right cavity of the housing 511, the gas or refrigerant will flow back from the mesh in the middle of the separator 550 to the left cavity of the housing 511. Finally, the gas or liquid flowing back will be input into the interior of the tertiary filter cover 570 through the mesh at the bottom of the separator 550 until the gas or refrigerant is input from the tertiary filter cover 570 into the interior of the output pipe 540. When the gas or liquid is input into the air guide cover 410, the impeller 430 will rotate under the impelling force of the airflow or the refrigerant, and finally the rod in the impeller 430 will help the impeller 450 to rotate, and the push rod 460 movably mounted on the top of the impeller 450 off the center column will be pulled to push the striker 470 to reciprocate and extend, at this time, the first clamp 440 fixed on the outside of the air guide cover 410 can provide a limit constraint on the extension of the striker 470, but after the cushion 480 is fixed on the outer wall of the shell 511, the striker 470 in regular extension can knock the cushion 480, and the shell 511 as a whole can be vibrated to shake off the dirt accumulated on its inner wall; Once the dirt accumulation in the primary filter assembly 560 and the inner cavity of the shell 511 increases, resulting in the obstruction of the gas input or liquid input, the primary filter assembly 560 will descend along the bottom of the left cavity of the shell 511 under the action of air pressure or hydraulic pressure, and under the linkage action of the linkage assembly 590, the output pipe 540 will also be reversely lifted. At this time, the pad 563 can also provide one-way protection for the mesh at the bottom of the separation pad 550, and then the cleaning liquid is input into the waterproof cover 610 through the liquid inlet pipe 620 until the cleaning liquid enters the lowered primary filter cover 562 from the waterproof cover 610, and the first plug 564 pushed upward by the second plug 581 can connect the inner cavity of the primary filter cover 562 with the left cavity of the shell 511, and the cavity above the shell 511 and the tertiary filter cover 570 can be directly cleaned by the cleaning liquid. Finally, under the flushing of the cleaning liquid, the dirt inside the gas tank cleaning mechanism 500 can be effectively cleaned; After the cleaned gas chamber cleaning mechanism 500 loses the pressure of the accumulated dirt, it will be pressurized and quickly reset until the complex cavity in the gas chamber cleaning mechanism 500 is quickly connected with the inner cavity of the guide cover 410.

[0032] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An air conditioning hot and cold switching valve with a backwash pre-filter, comprising a hot and cold switching valve (100), characterized in that: It also includes a main clamping assembly (200) and a secondary clamping assembly (300) arranged on the hot-cold conversion valve (100), a drainage transducer mechanism (400) arranged on the hot-cold conversion valve (100), an air chamber cleaning mechanism (500) arranged on the drainage transducer mechanism (400), a recoil cleaning mechanism (600) arranged on the air chamber cleaning mechanism (500), and an air flow pipe (700) arranged on the air chamber cleaning mechanism (500); The drainage energy conversion mechanism (400) comprises a flow guide cover (410) mounted on the hot / cold conversion valve (100), a first clamp (440) fixedly mounted on the top of the flow guide cover (410), a shaft sleeve (420) mounted on the top of the flow guide cover (410), an impeller (430) disposed in the shaft sleeve (420), a rotating wheel (450) mounted on the impeller (430), a push rod (460) movably mounted on the rotating wheel (450), and a striker (470) movably mounted on the other end of the push rod (460), wherein the striker (470) is movably mounted inside the first clamp (440); The gas tank cleaning mechanism (500) comprises a transfer assembly (510) arranged on the outer end of the deflector (410), a separation pad (550) arranged in the transfer assembly (510), a primary filter assembly (560) arranged in the left cavity of the transfer assembly (510), a tertiary filter cover (570) arranged in the right cavity of the transfer assembly (510), an input pipe (530) arranged on one side of the transfer assembly (510), an output pipe (540) arranged on the other side of the transfer assembly (510), a drainage assembly (580) arranged at the bottom of the transfer assembly (510), and a linkage assembly (590) arranged in the transfer assembly (510).

2. The air conditioning hot and cold switching valve with a backwash pre-filter according to claim 1, characterized in that: The transfer assembly (510) comprises a shell (511), a bottom gasket (513) mounted on the left cavity wall of the shell (511), a top gasket (514) mounted on the right cavity wall of the shell (511), and two limit rods (512) mounted on the bottom of the shell (511), and a gasket (480) is provided on the outer wall of the shell (511).

3. The air conditioning hot and cold switching valve with a backwash pre-filter according to claim 2, characterized in that: The primary filter assembly (560) comprises an anti-overflow end head (561) movably mounted in the housing (511), a primary filter cover (562) mounted at the bottom of the anti-overflow end head (561), a protective pad (563) mounted at the bottom of the primary filter cover (562), a first plug (564) disposed in a notch at the bottom of the primary filter cover (562), and a first spring (565) disposed outside the first plug (564) and bearing pressure on the bottom of the primary filter cover (562); The outer side of the primary filter cover (562) and the outer side of the tertiary filter cover (570) are both provided with grooves, and filtering notches are provided in both grooves; The top, middle and bottom of the separation pad (550) are provided with filter mesh holes; A hollow through hole is provided at the bottom end of the third-stage filter cover (570).

4. The air conditioning hot and cold switching valve with a backwash pre-filter according to claim 2, characterized in that: The backflushing cleaning mechanism (600) comprises a waterproof cover (610) mounted on a notch outside the housing (511), a liquid inlet pipe (620) mounted inside the waterproof cover (610), a third filter pad (630) arranged inside the liquid inlet pipe (620), a third plug (640) movably mounted inside the third filter pad (630), and a third spring (650) arranged outside the third plug (640) and bearing pressure on the third filter pad (630); A rubber gasket is provided at the top end of the liquid inlet pipe (620), and the rubber gasket is adapted to fit the top end of the third plug (640).

5. The air conditioning hot and cold switching valve with a backwash pre-filter according to claim 2, characterized in that: The main clamping assembly (200) comprises a first clamping plate (210), a first clamping buckle (220) mounted on the top of the first clamping plate (210), and a column (230) arranged outside the first clamping plate (210); The top end of the first clip (220) is fixedly mounted on the bottom of the housing (511); The auxiliary clamping assembly (300) comprises a second clamping plate (310) and a second clamping buckle (320) arranged outside the second clamping plate (310).

6. The air conditioning hot and cold switching valve with a backwash pre-filter according to claim 2, characterized in that: The gas chamber cleaning mechanism (500) further comprises two second clamps (520) mounted on the outer wall of the housing (511), and the liquid inlet pipe (620) is fixedly mounted in the two second clamps (520).

7. The air conditioning hot and cold switching valve with a backwash pre-filter according to claim 1, characterized in that: The drainage assembly (580) comprises a second plug (581) movably mounted in a hole at the bottom of the housing (511) and a second spring (582) arranged on the second plug (581); Uniformly distributed notches are provided in the end of the bottom of the second plug (581).

8. The air conditioning hot and cold switching valve with a backwash pre-filter according to claim 1, characterized in that: The linkage assembly (590) comprises a guard frame (591) and a clamp seat (595) fixedly mounted in the inner cavity of the housing (511); Two symmetrically distributed sliding sleeves (592) are movably mounted on the inner side of the guard frame (591), a first guide wheel (593) is arranged between the two sliding sleeves (592), and a first compression spring (594) is mounted on the bottom of the first guide wheel (593); A second guide wheel (596) is movably mounted on the inner end of the clamp seat (595), and a second compression spring (598) is mounted on the bottom of the clamp seat (595); A cable (597) is provided outside the first guide wheel (593) and the second guide wheel (596), and the bottom end of the cable (597) is installed on the top of the third-stage filter cover (570), and the top of the cable (597) is installed on the top of the anti-overflow terminal (561).

9. The air conditioning hot and cold switching valve with a backwash pre-filter according to claim 8, characterized in that: The guard frame (591) is composed of a rectangular pad and two supporting plates, and the inner side of the supporting plate is provided with a vertical groove, and the two sliding sleeves (592) are movably installed in the two vertical grooves; The bottom end of the first compression spring (594) is connected to the bottom of the vertical groove.

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