Combined refrigerating system and control method thereof

Abstract

The invention discloses a combined type refrigerating system and a control method thereof.The combined type refrigerating system comprises an evaporator, a compressor, a condenser, a condensate fan, an auxiliary control assembly and an auxiliary heat exchange assembly, the output end of the evaporator communicates with the compressor, the compressor communicates with the auxiliary control assembly, and the auxiliary control assembly communicates with the auxiliary heat exchange assembly and the condenser; the auxiliary heat exchange assembly is communicated with the condenser, the auxiliary control assembly is further communicated with the input end of the evaporator, a condensation fan is arranged on one side of the condenser, the inner condensation pipeline is arranged in the outer auxiliary heat dissipation cover and tightly attached to the outer auxiliary heat dissipation cover, and a temperature sensing probe is further arranged between the auxiliary control assembly and the evaporator. A control system is further arranged in the auxiliary control assembly, the flowing path of high-temperature gas exhausted by the compressor is changed through the auxiliary control assembly according to the change of the environment temperature, the effects of auxiliary condensation and heat energy recovery are achieved, and the overall working capacity of the structure is improved.

Description

Technical Field

[0001] The present invention relates to the field of automated machinery, and in particular to a compound refrigeration system and a control method thereof. Background Art

[0002] The common operating environment of the existing external condensing unit industry is 30-35°C, and the common refrigerants used inside are R404a, R410a, R134a, etc. The external condensing unit contains the following key components (compressor, condenser, cooling fan).

[0003] The main function of the external condensing unit is to condense the high-temperature and high-pressure gaseous refrigerant into liquid through heat dissipation.

[0004] The compressor runs after being powered on, doing work on the low-temperature and low-pressure gaseous refrigerant it inhales, and discharging the high-temperature and high-pressure gaseous refrigerant. The refrigerant gradually cools down and condenses into liquid through the condenser pipeline and with the assistance of the cooling fan (convection heat exchange with the external ambient air).

[0005] The liquid refrigerant is connected to the indoor unit through a pipeline, and the pressure is changed by a throttling device, so that the liquid refrigerant evaporates in the evaporator of the indoor unit (the evaporation process is accompanied by heat absorption), thereby achieving a cooling effect.

[0006] During this process, once the ambient temperature is too high (over 40°C), the condensation effect will drop sharply, resulting in the inability of the gaseous refrigerant to be completely condensed into liquid, and ultimately causing the external condensing unit to fail.

[0007] When the ambient temperature is low (such as the northern winter climate, the outdoor temperature is as low as -10℃), the waste heat of the high-temperature and high-pressure gaseous refrigerant discharged by the compressor is directly dissipated and condensed, which is not effectively utilized. Summary of the invention

[0008] The main purpose of the present invention is to provide a compound refrigeration system and a control method thereof.

[0009] To achieve the above object, the technical solution adopted by the present invention is:

[0010] A compound refrigeration system comprises an evaporator, a compressor, a condenser, a condensing fan, an auxiliary control component and an auxiliary heat exchange component, wherein the output end of the evaporator is connected to the compressor, the compressor is connected to the auxiliary control component, the auxiliary control component is respectively connected to the auxiliary heat exchange component and the condenser, the auxiliary heat exchange component is connected to the condenser, and the auxiliary control component is also connected to the input end of the evaporator, a condensing fan is provided on one side of the condenser, the condenser is L-shaped, the L-shaped condenser comprises an outer auxiliary heat dissipation cover and an inner condensation pipeline, the inner condensation pipeline is arranged in the outer auxiliary heat dissipation cover and is tightly fitted with the outer auxiliary heat dissipation cover, a temperature sensing probe is also provided between the auxiliary control component and the evaporator, and a control system is also provided in the auxiliary control component.

[0011] Furthermore, the auxiliary control component includes a flow direction controller and a controllable four-way valve. The flow direction controller controls the controllable four-way valve, and the input end of the controllable four-way valve is connected to the output end of the compressor.

[0012] Furthermore, the flow direction controller includes a controller housing, an electromagnetic coil, a spring and a control block. A first regulating chamber is provided in the controller housing, a first inlet is provided on a side above the first regulating chamber, a first outlet, a second outlet and a third outlet are provided in sequence at the lower end of the first regulating chamber, a control block is slidably installed in the first regulating chamber, a spring is provided between one side of the control block and the first regulating chamber, two ends of the spring are respectively fixedly connected to the control block and the inner wall of the first regulating chamber, an electromagnetic coil is mounted on the controller housing, the electromagnetic coil cover is provided on the outer ring surface of the spring, a first opening is provided at the connecting end of the control block and the spring, and a connecting cavity is provided on the lower end surface of the control block.

[0013] Furthermore, the connecting cavity covers the first outlet and the second outlet at the same time or covers the second outlet and the third outlet at the same time, and when the first outlet and the second outlet are covered, the first inlet is connected with the third outlet through the first opening, and when the second outlet and the third outlet are covered, the first inlet is connected with the first outlet.

[0014] Furthermore, a first interface A is provided at the upper end of the controllable four-way valve, and the first interface A is connected to the compressor through a pipeline, and the side wall of the pipeline is connected to the first inlet of the flow direction controller. A first regulating port and a second regulating port are fixedly provided on both sides of the controllable four-way valve, respectively. The first regulating port is connected to the first outlet, and the second regulating port is connected to the third outlet. A boss protruding toward the interior of the controllable four-way valve is provided under the controllable four-way valve, and an interface B, an interface C and an interface D are provided on the boss in sequence. An adjusting part is slidably installed in the controllable four-way valve.

[0015] Furthermore, the regulating member includes an arc-shaped connecting portion, a movable piston and a connecting portion, and the movable pistons are fixedly connected to the two sides of the arc-shaped connecting portion through the connecting portion. A connecting groove is provided on the connecting portion, and the arc-shaped connecting portion is always connected to interface B and interface C or to interface C and interface D. When interface B is connected to interface C, the connecting groove is connected to interface D. When interface C and interface D are connected, the connecting groove is connected to interface B. Interface B is connected to the auxiliary heat exchange component, and interface D is connected to the condenser.

[0016] Furthermore, the auxiliary heat exchange component includes an annular inner tube and an annular outer tube, the annular inner tube is sheathed with an annular outer tube, the two end connecting ports of the annular inner tube are respectively connected to the condenser and the auxiliary control component, the two end connecting ports of the annular outer tube are respectively connected to a water pipe and a water outlet pipe, and the end connected to the water pipe is also provided with an electromagnetic ball valve.

[0017] Furthermore, a liquid pipe stop valve is provided between the auxiliary control assembly and the evaporator, and a return air stop valve is also provided between the compressor and the evaporator.

[0018] Furthermore, it also includes an ambient temperature sensing device, which is electrically connected to an electric control system provided in the auxiliary control component, and the electric control system is also electrically connected to a temperature sensing probe.

[0019] Furthermore, a control method for a compound refrigeration system, S1, when the control system detects that the ambient temperature is higher than 40°C through the ambient temperature sensing device, and at the same time detects that the condensation outlet temperature is too high through the temperature sensing probe, the auxiliary condensation device is started to improve the heat exchange efficiency and enhance the working capacity of the external condensing unit;

[0020] In this working state, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor first passes through the condenser, then passes through the condensation water pipe for auxiliary condensation again, and finally leads to the evaporator of the indoor unit. The circuit process is: indoor unit-compressor-interface A-interface D-condenser-auxiliary heat exchange component-interface B-interface C-indoor unit, forming a cycle;

[0021] S2, when the ambient temperature is low, the waste heat of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor is recycled and used to heat the indoor kitchen cleaning water. Warm water is more conducive to cleaning, thereby saving the loss of heat energy and achieving recycling and reuse;

[0022] Under this working state, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor first passes through the condensation water pipe, then through the condenser, and finally reaches the indoor unit. The circuit flow is: indoor unit-compressor-interface A-interface B-auxiliary heat exchange component-condenser-interface D-interface C-indoor unit, forming a cycle.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention changes the flow path of the high-temperature gas discharged from the compressor according to the change of the ambient temperature through an auxiliary control component, thereby solving the problem of malfunction of the external condensing unit when the ambient temperature is high (over 40°C and below 50°C); and optimizing the problem of energy loss and waste when the outdoor condensing unit works at a low ambient temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the process of the present invention;

[0026] Figure 2 It is a three-dimensional structural diagram of the present invention;

[0027] Figure 3 It is a partial structural schematic diagram of the auxiliary control component of the present invention.

[0028] Reference numerals

[0029] 1. Compressor; 2. Condenser; 3. Condenser fan; 4. Auxiliary control assembly; 5. Auxiliary heat exchange assembly; 21. External auxiliary heat dissipation cover; 22. Internal condensation pipeline; 6. Temperature sensor; 41. Flow direction controller; 42. Controllable four-way valve; 411. Controller housing; 412. Solenoid coil; 413. Spring; 414. Control block; 415. First regulating chamber; 416. First inlet; 417. First outlet; 418. Second outlet port; 419. third outlet; 421. first interface A; 422. first regulating port; 423. second regulating port; 424. boss; 425. interface B; 426. interface C; 427. interface D; 428. regulating member; 4281. arc-shaped connecting portion; 4282. movable piston; 4283. connecting portion; 4284. connecting groove; 51. electromagnetic ball valve; 11. liquid pipe stop valve; 12. return air stop valve; 9. evaporator. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0031] See also Figure 1-3As shown, a composite refrigeration system and a control method thereof include an evaporator, a compressor 1, a condenser 2, a condensing fan 3, an auxiliary control component 4 and an auxiliary heat exchange component 5. The output end of the evaporator is connected to the compressor 1, and the compressor 1 is connected to the auxiliary control component 4. The high-pressure and high-temperature gas output by the compressor 1 is controlled by the auxiliary control component 4 to flow through the path, thereby achieving different effects. The auxiliary control component 4 is respectively connected to the auxiliary heat exchange component 5 and the condenser 2. The auxiliary heat exchange component 5 is connected to the condenser 2. The high-temperature gas flowing out of the compressor 1 is controlled by the auxiliary control component 4 to first pass through the condenser 2 and then pass through the auxiliary heat exchange component 5 or first pass through the auxiliary heat exchange component 5 and then pass through the condenser 2. The auxiliary control component 4 is also connected to the input end of the evaporator. One side of the condenser 2 is provided with There is a condensing fan 3, and the condenser 2 is L-shaped. The L-shaped condenser 2 increases the distance of the condensation flow path and increases the contact area with the outside, thereby improving the cooling effect and achieving a better condensation effect in a narrower environment. The L-shaped condenser 2 includes an external auxiliary heat dissipation cover 21 and an internal condensation pipeline 22. The internal condensation pipeline 22 is arranged in the external auxiliary heat dissipation cover 21 and fits tightly with the external auxiliary heat dissipation cover 21. A temperature sensing probe 6 is also provided between the auxiliary control component 4 and the evaporator. The temperature sensing probe 6 is used to monitor the temperature of the liquid flowing out of the condensation section, thereby determining whether auxiliary condensation is required. A control system is also provided in the auxiliary control component 4, and the control system is used to receive ambient temperature information and temperature information in the pipeline after condensation, thereby determining the adjustment plan of the condensation circuit.

[0032] The auxiliary control component includes a flow direction controller 41 and a controllable four-way valve 42 . The flow direction controller 41 controls the connection to the controllable four-way valve 42 . The input end of the controllable four-way valve 42 is connected to the output end of the compressor 1 .

[0033] The flow direction controller 41 is used to regulate the communication path of the four-way valve.

[0034] The flow direction controller 41 includes a controller housing 411, an electromagnetic coil 412, a spring 413 and a control block 414. A first regulating chamber 415 is provided in the controller housing 411. The first regulating chamber 415 is used to adjust the position of the control block 414. A first inlet 416 is provided on one side above the first regulating chamber 415 to control the entry of gas. A first outlet 417 is provided at the lower end of the first regulating chamber 415 in sequence. The first outlet 417 is used to connect to the first connection port to push the regulating member 428 toward the second connection port. The second outlet 418 is used for exhaust and a third outlet 419 is used to connect to the second connection port to push the regulating member 428 toward the first connection port. A control block 414 is slidably installed in the section cavity 415, and a spring 413 is provided between one side of the control block 414 and the first regulating cavity 415. The two ends of the spring 413 are fixedly connected to the control block 414 and the inner wall of the first regulating cavity 415 respectively. An electromagnetic coil 412 is mounted on the controller housing 411. The electromagnetic coil 412 increases or decreases the current under the control of the control system to control the length of the spring 413, thereby controlling the position of the control block 414 to achieve control effects of different pathways. The electromagnetic coil 412 is covered on the outer annular surface of the spring 413, and a first opening is provided at the connecting end of the control block 414 and the spring 413, and a connecting cavity is provided on the lower end surface of the control block 414.

[0035] During operation, the position of the connecting cavity is adjusted according to the position of the limit block, so that part of the airflow passes through the first outlet 417 or the third outlet 419, thereby changing the position of the regulating member 428 and realizing the change of the flow path, and the second outlet 418 is used to release the pressure of the gap on one side of the moving direction of the regulating member 428.

[0036] The connecting cavity covers the first outlet 417 and the second outlet 418 at the same time or covers the second outlet 418 and the third outlet 419 at the same time, and when the first outlet 417 and the second outlet 418 are covered, the first inlet 416 is connected with the third outlet 419 through the first opening, and when the second outlet 418 and the third outlet 419 are covered, the first inlet 416 is connected with the first outlet 417.

[0037] A first interface A421 is provided at the upper end of the controllable four-way valve 42, and the first interface A421 is connected to the compressor 1 through a pipeline, and the side wall of the pipeline is connected to the first inlet 416 of the flow controller 41, and a first regulating port 422 and a second regulating port 423 are fixedly provided on both sides of the controllable four-way valve 42, respectively, the first regulating port 422 is connected to the first outlet 417, and the second regulating port 423 is connected to the third outlet 419, and a boss 424 protruding toward the inside of the controllable four-way valve 42 is provided under the controllable four-way valve 42, and an interface B425, an interface C426 and an interface D427 are provided on the boss 424 in sequence, and an adjusting member 428 is slidably installed in the controllable four-way valve 42.

[0038] The regulating member 428 includes an arc-shaped connecting portion 4281, a movable piston 4282 and a connecting portion 4283. The movable pistons 4282 are fixedly connected to the two sides of the arc-shaped connecting portion 4281 through the connecting portion 4283. A connecting groove 4284 is provided on the connecting portion 4283. The arc-shaped connecting portion 4281 is always connected to the interface B425 and the interface C426 or to the interface C426 and the interface D427. When the interface B425 is connected to the interface C426, the connecting groove 4284 is connected to the interface D427. When the interface C426 and the interface D427 are connected, the connecting groove 4284 is connected to the interface B425. The interface B425 is connected to the auxiliary heat exchange component 5, and the interface D427 is connected to the condenser 2.

[0039] The auxiliary heat exchange component 5 includes an annular inner tube and an annular outer tube, wherein the annular outer tube is sheathed outside the annular inner tube, and the connecting ports at both ends of the annular inner tube are respectively connected to the condenser 2 and the auxiliary control component 4, and the connecting ports at both ends of the annular outer tube are respectively connected to a water pipe and a water outlet pipe, and an electromagnetic ball valve 51 is also provided at the end connected to the water pipe.

[0040] A liquid pipe stop valve 11 is further provided between the auxiliary control assembly 4 and the evaporator, and a return air stop valve 12 is also provided between the compressor 1 and the evaporator.

[0041] It also includes an ambient temperature sensing device, which is electrically connected to the electric control system provided in the auxiliary control component 4 , and the electric control system is also electrically connected to the temperature sensing probe 6 .

[0042] When the control system detects that the ambient temperature is higher than 40°C through the ambient temperature sensing device, and detects that the condensing outlet temperature is too high through the temperature sensing probe 6, the auxiliary condensing device is started to improve the heat exchange efficiency and enhance the working capacity of the external condensing unit;

[0043] In this working state, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 1 first passes through the condenser 2, and then is condensed again through the condensation water pipe, and finally leads to the evaporator of the indoor unit. The circuit flow is: indoor unit-compressor 1-interface A-interface D427-condenser 2-auxiliary heat exchange component 5-interface B425-interface C426-indoor unit, forming a cycle;

[0044] When the ambient temperature is low, the waste heat of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor 1 is recycled and used to heat the indoor kitchen cleaning water. Warm water is more conducive to cleaning, thereby saving the loss of heat energy and achieving recycling and reuse;

[0045] In this working state, the high-temperature and high-pressure gaseous refrigerant discharged by the compressor 1 first passes through the condensation water pipe, then passes through the condenser 2, and finally reaches the indoor unit. The loop process is: indoor unit-compressor 1-interface A-interface B425-auxiliary heat exchange component 5-condenser 2-interface D427-interface C426-indoor unit, forming a cycle.

[0046] Example:

[0047] The hardware conditions and related controls required by the controller in this composite system are:

[0048] Ambient temperature sensor

[0049] The four-way valve is controlled according to different ambient temperatures and switched to different modes. When the ambient temperature is higher than 30°C, the four-way valve turns on the "auxiliary condensation mode" and the system circuit is "ADBC" (exhaust-condenser-water jacket-liquid pipe stop valve);

[0050] When the ambient temperature is lower than 5°C, the four-way valve switches to "heat recovery mode" and the system circuit is "ABDC" (exhaust-water jacket-condenser-liquid pipe stop valve);

[0051] Different mode switching, with signal output display,

[0052] In the "auxiliary condensation mode", a temperature sensor device is installed at the front end of the liquid pipe stop valve. When the temperature at the end of the condensation outlet is higher than 48°C, the electromagnetic ball valve at the water inlet of the external water-cooling jacket opens; when the temperature is lower than 42°C (hysteresis 2°C), the ball valve closes.

[0053] The electromagnetic ball valve has the function of automatically adjusting the valve opening, which is divided into 5 gears (0 / 25 / 50 / 75 / 100), and the default opening is 50%; when it is continuously opened for 40 minutes and the shutdown temperature is not reached, the valve opening will automatically increase from 50 to 75; when it is continuously opened for less than 10 minutes and the shutdown temperature is reached, the valve opening will automatically decrease from 50 to 25; the electromagnetic ball valve is opened / closed with a signal output.

[0054] In "heat recovery mode", three modes are available:

[0055] a. By default, the water ball valve is always open for 24 hours, and the fixed opening is 50%;

[0056] b. The default fixed opening is 50% when the compressor starts and stops;

[0057] c. When the exhaust temperature is higher than 50℃, the water ball valve is opened with a fixed opening of 50%.

[0058] The above controls all have signal outputs, and when sensors or other components fail, alarm signals will be output.

[0059] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by ordinary technicians in this field based on the contents disclosed by the present invention should be included in the protection scope recorded in the claims.

Claims

1. A compound refrigeration system, characterized in that: The invention comprises an evaporator, a compressor (1), a condenser (2), a condensing fan (3), an auxiliary control component (4) and an auxiliary heat exchange component (5); the output end of the evaporator is connected to the compressor (1); the compressor (1) is connected to the auxiliary control component (4); the auxiliary control component (4) is respectively connected to the auxiliary heat exchange component (5) and the condenser (2); the auxiliary heat exchange component (5) is connected to the condenser (2); the auxiliary control component (4) is also connected to the input end of the evaporator; a condensing fan (3) is provided on one side of the condenser (2); the condenser (2) is L-shaped; the L-shaped condenser (2) comprises an outer auxiliary heat dissipation cover (21) and an inner condensation pipeline (22); the inner condensation pipeline (22) is provided in the outer auxiliary heat dissipation cover (21) and is tightly fitted with the outer auxiliary heat dissipation cover (21); a temperature sensing probe (6) is provided between the auxiliary control component (4) and the evaporator; and a control system is also provided in the auxiliary control component (4).

2. A compound refrigeration system according to claim 1, characterized in that: The auxiliary control component comprises a flow direction controller (41) and a controllable four-way valve (42); the flow direction controller (41) controls the connection to the controllable four-way valve (42); the input end of the controllable four-way valve (42) is connected to the output end of the compressor (1).

3. A compound refrigeration system according to claim 2, characterized in that: The flow direction controller (41) comprises a controller housing (411), an electromagnetic coil (412), a spring (413) and a control block (414). A first regulating chamber (415) is provided in the controller housing (411). A first inlet (416) is provided on one side above the first regulating chamber (415). A first outlet (417), a second outlet (418) and a third outlet (419) are provided at the lower end of the first regulating chamber (415). The control block (414) is slidably mounted in the first regulating chamber (415). 4), a spring (413) is provided between one side of the control block (414) and the first regulating chamber (415), two ends of the spring (413) are respectively fixedly connected to the control block (414) and the inner wall of the first regulating chamber (415), an electromagnetic coil (412) is mounted on the controller housing (411), the electromagnetic coil (412) is covered on the outer ring surface of the spring (413), a first opening is provided at the connecting end of the control block (414) and the spring (413), and a communicating cavity is provided on the lower end surface of the control block (414).

4. A compound refrigeration system according to claim 3, characterized in that: The communicating cavity is provided with a first outlet (417) and a second outlet (418) at the same time, or with a second outlet (418) and a third outlet (419) at the same time. When the first outlet (417) and the second outlet (418) are covered, the first inlet (416) is communicated with the third outlet (419) through the first opening. When the second outlet (418) and the third outlet (419) are covered, the first inlet (416) is communicated with the first outlet (417).

5. A compound refrigeration system according to claim 2, characterized in that: The controllable four-way valve (42) is provided with a first interface A (421) at the upper end thereof. The first interface A (421) is connected to the compressor (1) via a pipeline, and the side wall of the pipeline is communicated with the first inlet (416) of the flow direction controller (41). The controllable four-way valve (42) is respectively provided with a first regulating port (422) and a second regulating port (423) fixedly provided on both sides thereof. The first regulating port (422) is communicated with the first outlet (417), and the second regulating port (423) is communicated with the third outlet (419). The controllable four-way valve (42) is provided with a boss (424) protruding toward the inside of the controllable four-way valve (42), and the boss (424) is provided with an interface B (425), an interface C (426) and an interface D (427) in sequence. An adjusting member (428) is slidably installed in the controllable four-way valve (42).

6. A compound refrigeration system according to claim 5, characterized in that: The regulating member (428) comprises an arc-shaped connecting portion (4281), a movable piston (4282) and a connecting portion (4283). The movable pistons (4282) are fixedly connected to both sides of the arc-shaped connecting portion (4281) via the connecting portion (4283). A connecting groove (4284) is provided on the connecting portion (4283). The arc-shaped connecting portion (4281) is always connected to the interface B (425) and the interface C (426) or to the interface C (426) and the interface D (427). When the interface B (425) is connected to the interface C (426), the connecting groove (4284) is connected to the interface D (427). When the interface C (426) and the interface D (427) are connected, the connecting groove (4284) is connected to the interface B (425). The interface B (425) is connected to the auxiliary heat exchange component (5), and the interface D (427) is connected to the condenser (2).

7. A compound refrigeration system according to claim 1, characterized in that: The auxiliary heat exchange component (5) comprises an annular inner tube and an annular outer tube, the annular outer tube being sheathed outside the annular inner tube, the connecting ports at both ends of the annular inner tube being respectively connected to the condenser (2) and the auxiliary control component (4), the connecting ports at both ends of the annular outer tube being respectively connected to a water pipe and a water outlet pipe, and the end connected to the water pipe is also provided with an electromagnetic ball valve (51).

8. A compound refrigeration system according to claim 1, characterized in that: A liquid pipe stop valve (11) is also provided between the auxiliary control component (4) and the evaporator, and a return air stop valve (12) is also provided between the compressor (1) and the evaporator.

9. A compound refrigeration system according to claim 1, characterized in that: It also includes an ambient temperature sensing device, which is electrically connected to an electric control system provided in the auxiliary control component (4), and the electric control system is also electrically connected to a temperature sensing probe (6).

10. A control method for a compound refrigeration system according to any one of claims 1 to 9, characterized in that: S1, when the control system detects that the ambient temperature is higher than 40°C through the ambient temperature sensing device and detects that the condensation outlet temperature is too high through the temperature sensing probe (6), the auxiliary condensation device is started to improve the heat exchange efficiency and enhance the working capacity of the external condensing unit; In this working state, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor (1) first passes through the condenser (2), then is assisted in condensation again through the condensation water pipe, and finally flows to the evaporator of the indoor unit. The circuit flow is: indoor unit - compressor (1) - interface A - interface D (427) - condenser (2) - auxiliary heat exchange component (5) - interface B (425) - interface C (426) - indoor unit, forming a cycle; S2, when the ambient temperature is low, the waste heat of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor (1) is recycled and used to heat indoor kitchen cleaning water. Warm water is more conducive to cleaning, thereby saving heat energy loss and achieving recycling and reuse; In this working state, the high-temperature and high-pressure gaseous refrigerant discharged from the compressor (1) first passes through the condensation water pipe, then passes through the condenser (2), and finally reaches the indoor unit. The circuit flow is: indoor unit-compressor (1)-interface A-interface B (425)-auxiliary heat exchange component (5)-condenser (2)-interface D (427)-interface C (426)-indoor unit, forming a cycle.

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