CN110006165A - A protection device, protection method and air conditioner for both low temperature defrosting and high temperature protection - Google Patents

Abstract

The invention provides a protection device, a protection method and an air conditioner for both low-temperature defrosting and high-temperature protection, and relates to the technical field of air conditioners, comprising a water receiving tray, a buffer water tank, a heat pipe, a cooling jacket, a water tank, a water pump and a valve; The plate is communicated with the buffer water tank; the two ends of the heat pipe are respectively inserted into the buffer water tank and the inside of the outdoor condenser; the cooling jacket is sleeved on the outside of the compressor, the buffer water tank is communicated with the cooling jacket, and the cooling jacket is provided with a water outlet pipe; the cooling jacket, The water pump is communicated with the water tank and the buffer water tank to form a circulation passage; the valve includes a first valve, a second valve and a third valve. The protection device, the protection method and the air conditioner for both low-temperature defrosting and high-temperature prevention of the present invention can prevent the air conditioner from being shut down at high temperature in summer; at the same time, the compressor is used to dissipate heat and heat the circulating water, so as to cool the compressor and heat the outdoor condenser at the same time. , can make the air conditioner winter heating operation without frost.

Description

A protection device, protection method and air conditioner for both low temperature defrosting and high temperature protection

technical field

The present invention relates to the technical field of air conditioners, and in particular, to a protection device, a protection method and an air conditioner for both low-temperature defrosting and high-temperature protection.

Background technique

With the development of air-conditioning technology, people often choose to use heat pump air conditioners for heating in winter, which is an energy-saving heating method. However, when the air-cooled heat pump operates under the condition that the outdoor ambient temperature is lower than about 5°C, the surface temperature of the evaporator is likely to be lower than 0°C, and frost will occur on the surface of the outdoor heat exchanger, which will reduce the size of the fins. Therefore, when the frost layer of the outdoor heat exchanger reaches a certain thickness, it must be defrosted. At present, the most widely used defrosting method is to use a four-way valve reversing reverse cycle to convert the outdoor heat exchanger into a condenser. This method is simple to operate and does not require additional components. However, the biggest disadvantage of this defrosting method is that during the defrosting period Completely suspend heat supply to the room, and also need to absorb heat from the room for defrosting, which seriously affects the comfort of the room; in addition, the frequent start-up and shutdown of this defrosting method and large fluctuations in pressure will cause serious damage to equipment such as compressors. A large impact will affect the reliability of its use.

In summer, heat pump air conditioners are used for cooling, and when the outside temperature is high, the ambient temperature of the air conditioner may be higher than 55 ℃, which will reduce the cooling capacity of the air conditioner condenser, greatly reduce the cooling effect of the air conditioner, and even cause high temperature shutdown and cannot be used.

It can be seen that there is a need for a protection device that can eliminate the unfavorable state of the air conditioner under low temperature and high temperature conditions. under defrosting solution.

SUMMARY OF THE INVENTION

The invention solves the problems that the air conditioner is easy to form frost when it is heating under low temperature, and the temperature of the machine is too high when cooling under high temperature, resulting in poor cooling or heating effect of the air conditioner, shutdown or even damage.

In order to solve the above problems, the present invention provides a protection device for both low temperature defrosting and high temperature protection, including a water receiving tray, a buffer water tank, a heat pipe, a cooling jacket, a water tank, a water pump and a valve;

The water receiving tray is arranged below the indoor evaporator, and the water receiving tray is communicated with the buffer water tank;

One end of the heat pipe is inserted into the buffer water tank, and the other end of the heat pipe is inserted into the outdoor condenser;

The cooling jacket is sleeved on the outside of the compressor, the buffer water tank is communicated with the cooling jacket, and the cooling jacket is provided with a water outlet pipe;

The cooling jacket, the water pump and the water tank are connected in sequence, and the water tank is connected with the buffer water tank to form a circulation passage;

The valve includes a first valve, a second valve and a third valve, the first valve is arranged between the water receiving tray and the buffer water tank, and the second valve is arranged at the water outlet pipe, so the The third valve is arranged between the water pump and the cooling jacket or the water tank.

When running heating in winter, the heat generated by the compressor is activated, and the outdoor condenser is heated through water as a medium, so that the outdoor unit does not form frost in a low temperature environment; when running cooling in summer, the condensed water discharged from the room is used to achieve Cooling treatment of outdoor unit.

Optionally, a first tee is provided on the first connection pipeline between the water receiving pan and the buffer water tank, and the three ports of the first tee are respectively connected to the water receiving pan, the buffer water tank and the The water tank simplifies the structure and improves the utilization rate of the pipeline.

Optionally, the first valve is disposed between the water receiving tray and the first three-way, and when the first valve is closed, the water in the water receiving tray will not flow into the buffer water tank and the water tank.

Optionally, the valve further includes a fourth valve, the fourth valve is arranged between the water tank and the first three-way, and the fourth valve is closed, which can prevent the condensed water in the water receiving tray from flowing to the water tank It can also prevent the water in the water tank from being poured back to the water receiving tray due to some uncontrollable factors, and prevent the water in the water receiving tray from being spilled due to too much water.

Optionally, a second connection line between the water pump and the cooling jacket is provided with a second tee, and three ports of the second tee are respectively connected to the water pump, the cooling jacket and the The outlet pipe simplifies the structure and improves the utilization rate of the pipeline

Optionally, when the third valve is arranged between the water pump and the cooling jacket, the third valve is arranged between the water pump and the second three-way, to the water tank, the water outlet pipe and the The opening and closing of the pipeline between the cooling jackets is controlled.

Optionally, the level of the water receiving tray is higher than that of the buffer water tank to ensure that the condensed water in the water receiving tray can enter the buffer water tank under the action of gravity.

Optionally, the end of the heat pipe inserted into the outdoor condenser passes through the fins in sequence, so as to ensure that the heat pipe and the fin are fully connected, and improve the heat transfer efficiency of the heat pipe to the outdoor condenser.

Optionally, a heat-conducting sheet is provided at one end of the heat pipe inserted into the buffer water tank to increase the heat exchange efficiency of the heat pipe.

Optionally, the outer side of the cooling jacket is covered with thermal insulation cotton to prevent the water in the cooling jacket from exchanging heat with the environment, thereby improving the energy exchange between the cooling jacket and the compressor.

Another object of the present invention is to provide an air conditioner, wherein the above-mentioned protection device is mounted in the air conditioner or disposed outside the air conditioner, the air conditioner has a more stable working state, and can operate at low temperatures Heating at high temperature and cooling at high temperature.

Another object of the present invention is to provide a protection method for both low-temperature defrosting and high-temperature protection, which collects the condensed water generated by the indoor evaporator and cools the outdoor condenser and/or the compressor when the air conditioner is operating in the refrigeration mode;

When the air conditioner is running in the heating mode, the external circulating water is led to the compressor for heating, and the compressor is cooled at the same time, and then the heated circulating water is led to the outdoor condenser for heat transfer. Circulate to the compressor for heating, and so on.

The protection method is simple and easy to implement, improves the utilization rate of energy, and provides an air-conditioning solution that takes into account both the defrosting in winter and the prevention of high temperature shutdown in summer.

Description of drawings

1 is a schematic diagram of a protection device according to an embodiment of the present invention;

2 is a schematic diagram of a heat pipe according to an embodiment of the present invention;

3 is a schematic diagram of a cooling jacket according to an embodiment of the present invention;

Fig. 4 is the working schematic diagram of the protection device according to the embodiment of the present invention when the air conditioner is refrigerating;

FIG. 5 is a schematic diagram of the operation of the protection device according to the embodiment of the present invention when the air conditioner is heating.

Description of reference numbers:

1-Water tray, 2-Buffer water tank, 3-Heat pipe, 31-Conductive sheet, 4-Cooling jacket, 41-Water outlet, 42-Sleeve, 43-First through hole, 44-Second through hole, 5-water tank, 6-water pump, 7-valve, 71-first valve, 72-second valve, 73-third valve, 74-fourth valve, 8-first connecting pipeline, 81-first tee , 9- the second connecting pipeline, 91- the second tee.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the description of the present invention, it should be noted that the terms "first" and "second" mentioned in the embodiments are only used for description purposes, and should not be understood as indicating or implying relative importance or implicitly indicating Indicates the number of technical characteristics. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature.

With the improvement of people's living standards and the development of air-conditioning technology, more and more people use air conditioners for heating in winter. Among them, heat pump type air conditioners are an energy-saving heating method. Change, realize the interchange of the functions of the evaporator and the condenser of the air conditioner, and change the cooling function of the indoor unit to the heating function.

However, when the heat pump air conditioner is heating, especially when the outdoor ambient temperature is low, the temperature on the surface of the evaporator may drop below zero, causing frosting of the heat exchanger and reducing the fins. The air passage increases the thermal resistance of the heat exchanger, causing the performance of the heat exchanger to deteriorate sharply, and defrosting is required. At present, the commonly used defrosting method is to use the four-way valve reversing reverse cycle, that is, the high-temperature refrigerant enters the frosted heat exchanger in reverse, and defrosts through high temperature, but due to the four-way valve reversing, the defrosting The process needs to completely suspend heat supply to the room, and needs to absorb heat from the room for defrosting, which seriously affects the comfort of the room; in addition, this defrosting method is frequently turned on and off, and the large fluctuation of pressure will also affect the compressor and other equipment. Cause a larger impact and reduce the service life.

When the heat pump air conditioner is refrigerating, especially when the outdoor ambient temperature is high, the cooling function of the air conditioner condenser is greatly reduced, the cooling effect of the air conditioner is insufficient, and even the compressor temperature is too high, the air conditioner is shut down and damaged. The air conditioner performs heat dissipation.

In view of the above problems, the present invention provides a protection device for both low-temperature defrosting and high-temperature protection, which is shown in FIG. with valve 7.

The water receiving tray 1 is arranged below the indoor evaporator. The water receiving tray 1 can be arranged inside the indoor unit or outside the indoor unit as an auxiliary device. The condensed water produced by the evaporator can drip into the indoor evaporator under the action of gravity. Specifically, the water receiving tray 1 is communicated with the buffer water tank 2, and the condensed water in the water receiving tray 1 can flow into the buffer water tank 2. .

Preferably, when installing the water receiving tray 1 and the buffer water tank 2, the height of the water receiving tray 1 should be higher than the height of the buffer water tank 2, and the connecting pipeline from the water receiving tray 1 to the buffer water tank 2 is gradually lowered to ensure that the water receiving tray The condensed water in 1 can flow into the buffer tank 2 under the action of gravity.

The heat pipe 3 is a heat transfer element with high thermal conductivity. It has high heat transfer efficiency, compact structure and small fluid resistance loss. It transfers heat through the evaporation and condensation of the working medium in the fully enclosed vacuum tube shell, and has extremely high thermal conductivity. , good isothermal, heat transfer area on both sides of cold and hot can be changed arbitrarily, long-distance heat transfer, temperature control and a series of advantages, the present invention uses heat pipe 3 as the heat transfer element, as shown in Figure 2, The heat pipe 3 is a horizontally placed cored heat pipe, which is filled with refrigerant and relies on the internal capillary force as the circulating power. Either end can be used as an evaporating end when heated, and the other end can be used as a condensing end to dissipate heat. As the condensing end, and the other end is the evaporating end, so as to realize the device of heating and cooling at the same time.

One end of the heat pipe 3 is inserted into the buffer water tank 2 and is in contact with the water flowing through the buffer water tank 2, and the other end of the heat pipe 3 is inserted into the outdoor condenser, preferably, such as an air conditioner heat exchange pipe combined with fins The end of the heat pipe 3 inserted into the outdoor condenser passes through the fins in turn to ensure that the heat pipe 3 is fully connected to the fins and improve the heat transfer efficiency of the heat pipe 3 to the outdoor condenser.

Preferably, one end of the heat pipe 3 inserted into the buffer water tank 2 is provided with a thermally conductive sheet 31. The thermally conductive sheet 31 can be made of copper, aluminum or other metals with good thermal conductivity. There are multiple thermally conductive sheets 31. The sheets 31 are arranged at intervals at one end of the heat pipe 3 inserted into the buffer water tank 2 to increase the heat exchange efficiency of the heat pipe 3 .

The cooling jacket 4 is sleeved on the outside of the compressor, the buffer water tank 2 is communicated with the cooling jacket 4, the water in the buffer water tank 2 can flow into the cooling jacket 4, and the water in the cooling jacket 4 can also flow into buffer tank 2.

The cooling jacket 4 is provided with a water outlet pipe 41, and the water in the cooling jacket 4 can be discharged through the water outlet pipe 41; The water maintains heat preservation, prevents the water in the cooling jacket 4 from exchanging heat with the environment, and improves the energy exchange between the cooling jacket 4 and the compressor.

Specifically, as shown in FIG. 3 and FIG. 4 , the cooling jacket 4 includes a sleeve 42 , a first through hole 43 and a second through hole 44 , the sleeve 42 is a hollow structure, and the sleeve 42 is one wrapped around the surface of the compressor. , a cylindrical shell that can pass water inside, the water flows in the internal channel, takes away the heat generated on the surface of the compressor, and transfers the heat generated on the surface of the compressor to the water in the casing, which can heat the water; the first through hole 43 Both the second through hole 44 and the inner cavity of the sleeve 42 communicate with each other. Specifically, the first through hole 43 is higher than the height of the second through hole 44, and the first through hole 43 is located at a position near the top of the side wall of the sleeve 42. The second through hole 44 is located near the bottom of the side wall of the sleeve 42 , the first through hole 43 is communicated with the water pump 6 , the second through hole 44 is communicated with the buffer water tank 2 , and optionally, the first through hole 43 can be connected with the buffer water tank 2 is connected, and the second through hole 44 can be communicated with the water pump 6 .

The buffer water tank 2, the cooling jacket 4, the water pump 6 are connected with the water tank 5 in sequence, and the water tank 5 is connected with the buffer water tank 2 through another pipeline to form a circulation path;

Specifically, the valve 7 includes a first valve 71, a second valve 72 and a third valve 73. The first valve 71 is arranged between the water receiving tray 1 and the buffer water tank 2. The first valve 71 is opened to receive water. The condensed water in the pan 1 flows into the buffer water tank 2. When the first valve 71 is closed, the water receiving pan 1 is disconnected from the buffer water tank 2; the second valve 72 is set at the water outlet pipe 41, and when the second valve 72 is opened , the water in the buffer water tank 2 can be discharged through the water outlet pipe 41, and the second valve 72 is closed to close the water outlet pipe 41; the third valve 73 is arranged between the water pump 6 and the cooling jacket 4 or the water tank 5, when the third valve 73 is opened , the water pump 6 can pump the water in the water tank 5 into the cooling jacket 4 , and the third valve 73 is closed to block the communication between the water pump 6 and the water tank 5 .

Preferably, as shown in FIG. 1 , the water receiving tray 1 and the buffer water tank 2 are connected through a first connecting pipeline 8 , and the first connecting pipeline 8 is provided with a first three-way 81 , and the three-way connection of the first three-way 81 . The ports are respectively connected to the water receiving tray 1, the buffer water tank 2 and the water tank 5. At this time, the two devices of the water tank 5 and the water receiving tray 1 share a pipeline to communicate with the buffer water tank 2, which simplifies the structure and improves the utilization rate of the pipeline.

Specifically, as shown in FIG. 1 , the first valve 71 is arranged between the water-receiving pan 1 and the first three-way 81 . When the first valve 71 is closed, the water in the water-receiving pan 1 will not flow to the buffer tank 2 and the buffer tank 2 . in tank 5.

Specifically, as shown in FIG. 1 , the valve 7 further includes a fourth valve 74 . The fourth valve 74 is arranged between the water tank 5 and the first three-way 81 . When the first valve 71 is opened, the fourth valve 74 is closed, which can enable Prevent the condensed water in the water receiving tray 1 from flowing into the water tank 5, and also prevent the water in the water tank 5 from being poured back into the water receiving tray 1 due to some uncontrollable factors, and prevent the water in the water receiving tray 1 from overflowing due to excessive water. sprinkle.

Optionally, the water pump 6 and the cooling jacket 4 are connected through a second connecting pipeline 9, a second three-way 91 is provided on the second connecting pipeline 9, and the three ports of the second three-way 91 are respectively connected to cooling. The jacket 4, the water pump 6 and the water outlet pipe 41, the water outlet pipe 41 is connected to the second connecting pipeline 9 through a tee, which improves the utilization rate of the pipeline and simplifies the pipeline structure; under this structure, the third valve 73 is provided When between the water pump 6 and the cooling jacket 4 , the third valve 73 is preferably arranged between the water pump 6 and the second three-way 91 to open the pipeline between the water tank 5 and the water outlet pipe 41 and the cooling jacket 4 . closed for control.

Specifically, the above-mentioned protection device can be installed inside the air conditioner, or can be installed outside the air conditioner as an auxiliary device to protect the air conditioner during high-temperature cooling and low-temperature heating. When heating in winter, start the compression The heat generated by the machine is used to heat the outdoor condenser through water as a medium, so that the outdoor machine does not form frost in a low temperature environment; when running for cooling in summer, the condensed water discharged from the room is used to cool the outdoor machine.

As shown in FIG. 4 , the working principle of the protection device when the air conditioner is refrigerating is as follows: when the air conditioner operates for cooling in summer, the compressor operates, the outdoor condenser releases heat, and the indoor evaporator absorbs heat for cooling; Continuous operation, the surface of the indoor evaporator produces condensed water, and the water receiving tray 1 collects the condensed water; at this time, the first valve 71 and the second valve 72 are opened, the third valve 73 and the fourth valve 74 are closed, and the generated condensed water is Under the action of gravity, it enters the buffer tank 2 through the first valve 71 and the second valve 72, exchanges heat with the heat pipe 3 in the buffer tank 2, and transfers the cold energy to the end of the heat pipe 3 that is inserted into the outdoor condenser, thereby realizing the cooling effect of the condenser. Cooling, the condensed water after heat exchange comes out of the buffer tank 2 and enters the cooling jacket 4, and continues to cool the compressor. In a high temperature environment, the surface temperature of the compressor is very high, and the compressor is cooled to prolong the use of the compressor. life, and realize the stable operation of the air conditioner; finally, it is discharged through the second valve 72, and the whole process realizes the dual cooling function of the outdoor condenser and the compressor through the condensed water, the heat pipe 3 and the cooling jacket 4, which is beneficial to the high temperature environment. The stable operation of the air conditioner can well prevent the problems of poor heat dissipation and high temperature shutdown of the air conditioner in summer.

As shown in FIG. 5 , the working principle of the protection device when the air conditioner is heating is as follows: when the air conditioner operates for heating in winter, the compressor operates, the indoor evaporator releases heat, and the outdoor condenser absorbs heat. Continuous operation, the surface temperature of the outdoor condenser is getting lower and lower, and the surface temperature of the compressor is getting higher and higher. At this time, the first valve 71 and the second valve 72 are closed, and the third valve 73, the fourth valve 74 and the water pump 6 are opened; Under the action of the water pump 6, the water in the water tank 5 enters the cooling jacket 4 through the third valve 73, and the water in the cooling jacket 4 is heated by the heat emitted from the surface of the compressor, and the temperature of the compressor can be reduced at the same time; The heated water enters the buffer water tank 2 and exchanges heat with the heat pipe 3, and transfers the heat to the outdoor condenser to realize the heating of the outdoor condenser. The water after the buffer water tank 2 enters the water tank 5 through the fourth valve 74, In this way, the surface temperature of the outdoor condenser can be higher than 0°C, and the heating operation of the air conditioner does not form frost, and in a cold environment, the surface temperature of the condenser is increased, which can be beneficial to the heating of the air conditioner. Improve the comfort of using air conditioners in winter.

To sum up, the present invention provides a protection method for both low-temperature defrosting and high-temperature protection: when the air conditioner operates in the refrigeration mode, the condensed water generated by the indoor evaporator is collected and cooled to the outdoor condenser and/or compressor; When the heating mode is running, the external circulating water is led to the compressor for heating, and the compressor is cooled at the same time, and then the heated circulating water is led to the outdoor condenser for heat transfer. It is heated in the compressor and circulated in this way. The method realizes the cooling treatment of the outdoor unit, which can prevent the air conditioner from shutting down at high temperature in summer; at the same time, the compressor is used to dissipate heat to heat the circulating water, and the outdoor condenser is heated while cooling the compressor, so that the heating operation of the air conditioner in winter does not form frost. , and maintain a good heating effect in an environment where the temperature is lowered.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (12)

1. A protection device for both low temperature defrosting and high temperature protection, characterized in that it comprises a water receiving tray (1), a buffer water tank (2), a heat pipe (3), a cooling jacket (4), a water tank (5), water pump (6) and valve (7); The water receiving tray (1) is arranged below the indoor evaporator, and the water receiving tray (1) is communicated with the buffer water tank (2); One end of the heat pipe (3) is inserted into the buffer water tank (2), and the other end of the heat pipe (3) is inserted into the outdoor condenser; The cooling jacket (4) is sleeved on the outside of the compressor, the buffer water tank (2) is communicated with the cooling jacket (4), and the cooling jacket (4) is provided with a water outlet pipe (41); The cooling jacket (4), the water pump (6) and the water tank (5) are connected in sequence, and the water tank (5) is connected with the buffer water tank (2) to form a circulation passage; The valve (7) includes a first valve (71), a second valve (72) and a third valve (73), and the first valve (71) is arranged on the water receiving tray (1) and the buffer Between the water tanks (2), the second valve (72) is arranged at the water outlet pipe (41), and the third valve (73) is arranged at the water pump (6) and the cooling jacket (4) ) or between the water tank (5). 2. The protection device for both low-temperature defrosting and high-temperature protection according to claim 1, characterized in that the first connecting pipeline (8) between the water receiving tray (1) and the buffer water tank (2) is on the first connecting line (8). A first tee (81) is provided, and the three ports of the first tee (81) are respectively connected to the water receiving tray (1), the buffer water tank (2) and the water tank (5). 3. The protection device for both low-temperature defrosting and high-temperature protection according to claim 2, wherein the first valve (71) is arranged between the water receiving tray (1) and the first three-way ( 81) between. 4. The protection device for both low-temperature defrosting and high-temperature protection according to claim 2, wherein the valve (7) further comprises a fourth valve (74), and the fourth valve (74) is arranged at the between the water tank (5) and the first tee (81). 5. The protection device for both low temperature defrosting and high temperature protection according to claim 1, characterized in that, a second connecting pipeline (9) between the water pump (6) and the cooling jacket (4) is provided with There is a second three-way (91), and the three ports of the second three-way (91) are respectively connected to the water pump (6), the cooling jacket (4) and the water outlet pipe (41). 6. The protection device for both low temperature defrosting and high temperature protection according to claim 5, wherein the third valve (73) is arranged between the water pump (6) and the cooling jacket (4) During the time, the third valve (73) is arranged between the water pump (6) and the second three-way (91). 7 . The protection device for both low-temperature defrosting and high-temperature protection according to claim 1 , wherein the level of the water receiving tray ( 1 ) is higher than the level of the buffer water tank ( 2 ). 8 . 8. The protection device for both low-temperature defrosting and high-temperature protection according to claim 1, wherein the end of the heat pipe (3) inserted into the outdoor condenser passes through the fins in sequence. 9 . The protection device for both low-temperature defrosting and high-temperature protection according to claim 1 , characterized in that a heat conducting sheet ( 31 ) is provided at one end of the heat pipe ( 3 ) inserted into the buffer water tank ( 2 ). 10 . 10 . The protection device for both low-temperature defrosting and high-temperature protection according to claim 1 , wherein the outer side of the cooling jacket ( 4 ) is covered with thermal insulation cotton. 11 . 11. An air conditioner, wherein the protection device according to any one of claims 1 to 10 is mounted in the air conditioner, or disposed outside the air conditioner. 12. A protection method for both low-temperature defrosting and high-temperature protection, characterized in that, when the air-conditioning refrigeration mode operates, the condensed water generated by the indoor evaporator is collected and the outdoor condenser and/or the compressor is cooled; When the air conditioner is running in the heating mode, the external circulating water is led to the compressor for heating, and the compressor is cooled at the same time, and then the heated circulating water is led to the outdoor condenser for heat transfer. Circulate to the compressor for heating, and so on.