DE102021120875B3 - Cooling device for an air conditioner - Google Patents

Abstract

The present invention discloses a refrigerating apparatus for an air conditioner, comprising: at least one of R600A, R417A, R410C and R407C; at least one of hydrogen and helium; wherein the evaporator includes an inlet and an outlet; and wherein the condenser is provided with a condensation cavity, a gas inlet port, a gas outlet port and a liquid outlet port, and wherein a molecular sieve membrane is disposed in the condensation cavity; a first connecting pipe having one end connected to the outlet and the other end connected to the gas inlet port; a first connection pipe, one end of which is connected to the liquid outlet port and the other end is connected to the inlet; a third connection pipe, one end of which is connected to the gas outlet port and the other end is connected to the inlet; wherein an air blowing device is connected to the first connection pipe; and wherein the system pressure of the refrigerator is set to be higher than the saturation pressure at a temperature of the coolant of 40°C; a case, wherein the evaporator and the condenser are installed in the case. The refrigeration unit changes the traditional refrigeration cycle mode, and the energy consumption required for the condensation process is less, reducing the production cost of the refrigeration unit, thus achieving greater economic benefits, and by selecting appropriate refrigerant and decompression gases, the refrigeration temperature required by the air conditioner can be met will.

Description

TECHNICAL AREA

The present invention relates to the field of cooling technology, in particular a cooling device for an air conditioning system.

STATE OF THE ART

The conventional refrigeration process uses a compressor for compression to realize the condensation of the refrigeration working medium or uses the liquid to absorb the refrigeration working medium, and the two methods have high energy consumption.

the WO 2010/031 095 A2 discloses a device for evaporating and condensing a medium, in which the vapor is separated using a static electric field in the condenser.

CONTENT OF THE PRESENT INVENTION

The present invention aims to solve at least one of the technical problems of the prior art. To this end, the present invention provides a refrigeration apparatus for an air conditioner to realize refrigeration with less power consumption.

A refrigerator for the air conditioner in an embodiment according to the present invention, comprising: a refrigerant in piping of the refrigerator, the refrigerant including at least one of R600A, R417A, R410C and R407C;
a decompression gas disposed in the piping of the refrigerator and comprising at least one of hydrogen and helium;
an evaporator comprising an inlet and an outlet;
a condenser provided with a condensation cavity, a gas inlet port, a gas outlet port and a liquid outlet port, wherein in the condensation cavity a molecular sieve membrane is arranged, which is arranged between the gas inlet port and the gas outlet port, and wherein the molecular sieve membrane is used to separate the mixed gas separate the refrigerant and the decompression gas;
a first connection pipe having one end connected to the outlet and the other end connected to the gas inlet port;
a second connection pipe, one end of which is connected to the liquid outlet port and the other end is connected to the inlet,
a third connection pipe, one end of which is connected to the gas outlet port and the other end is connected to the inlet,
an air blowing device connected to the first connection pipe to introduce the mixed gas into the condensation cavity;
wherein the system pressure of the refrigerator is set to be higher than the saturation pressure at a temperature of the coolant of 40°C;
a housing provided with a first installation space and a second installation space, the first installation space being on the inside of the wall body and the second installation space on the outside of the wall body, and the evaporator in the first installation space and the condenser in the second installation space is installed.

The refrigeration apparatus for the air conditioner in an embodiment of the present invention has at least the following advantages: the liquid refrigerant and the decompression gas are mixed by the evaporator, so that the surface pressure of the liquid refrigerant decreases, thus the liquid refrigerant generates the vapor and is in a new dynamic equilibrium process to realize the evaporation of the refrigerant. then the molecular sieve membrane is used to separate the refrigerant and the decompression gas, when the refrigerant reaches a certain concentration, it condenses into a liquid refrigerant, which then enters the evaporator for cooling. The air conditioner refrigeration device changes the traditional refrigeration cycle mode, and the energy consumption required for the condensation process is less, reducing the production cost of the refrigeration device, thus achieving greater economic benefits, and by selecting appropriate refrigerant and decompression gases, the air conditioner can save required cooling temperature are met.

According to some embodiments of the present invention, the terminal of the third connection pipe protrudes into the second connection pipe and protrudes from the inner wall of the second connection pipe.

According to some embodiments of the present invention, the second connecting pipe includes a liquid storage portion including a plurality of U-shaped pipes.

According to some embodiments of the present invention, the cooling device further includes a heat dissipation device used for heat dissipation of the condenser.

According to some embodiments of the present invention, the heat dissipation device includes a cooling pipe wound on the outside of the condenser.

According to some embodiments of the present invention, the system pressure of the chiller is set to be twice the saturation pressure at a coolant temperature of 40°C.

According to some embodiments of the present invention, the system pressure of the chiller is set to 8 bar when the refrigerant is R600A.

According to some embodiments of the present invention, the system pressure of the chiller is set to 40 bar when the refrigerant is R417A.

According to some embodiments of the present invention, the system pressure of the chiller is set to 40 bar when the refrigerant is R410C.

According to some embodiments of the present invention, the system pressure of the chiller is set to 30 bar when the refrigerant is R407C.

The additional aspects and advantages of the present invention will be set forth in part in the following description, and some will be apparent from the following description or will be understood through practice of the present invention.

character list

• 1 zeigt ein schematisches Diagramm eines Kühlgeräts gemäß der vorliegenden Erfindung.
• 2 zeigt eine schematische Darstellung der Verbindung zwischen dem dritten Verbindungsrohr und dem zweiten Verbindungsrohr gemäß 1.
• 3 zeigt eine schematische Montageansicht eines Kühlgeräts für die Klimaanlage in einem Ausführungsbeispiel der vorliegenden Erfindung.

The present invention is explained in more detail below in connection with figures and exemplary embodiments.

• 1 Figure 12 shows a schematic diagram of a cooling device according to the present invention.
• 2 FIG. 12 shows a schematic representation of the connection between the third connection pipe and the second connection pipe according to FIG 1 .
• 3 Fig. 12 is a schematic assembly view of a cooling device for the air conditioner in an embodiment of the present invention.

Reference List

101

Evaporator

102

capacitor

103

First connecting pipe

104

Second connecting tube

105

Third connecting tube

106

air blowing device

107

molecular sieve membrane

108

liquid storage section

109

heat dissipation device

301

Housing

302

wall body

DETAILED DESCRIPTION

In the following, the embodiment of the present invention will be explained in more detail. All examples of the embodiment are illustrated in figures, in which the same or similar reference numbers from start to finish stand for the same or similar elements or elements with the same or similar function. The embodiments explained in connection with the figures are exemplary, serve to explain the present invention and cannot be understood as a limitation for the present invention.

It should be pointed out that in the explanation of the present invention, the directional or positional relationships with the terms such as "top", "bottom", "front", "back", "left", "right" etc. refer to the in Figures shown directional or positional relationships are based. They serve only to explain the present invention and to facilitate the explanation. They do not indicate or imply that the devices or elements depicted have any particular orientation or are intended to be constructed and operated in any particular direction. Due to this, it cannot be construed as limiting the present invention.

In the explanation of the present invention, "some" means one or more, where "more" means more than two, and where "greater than", "less than", "exceed" etc. are understood to mean that the number is not included , and where “above”, “below”, “within”, etc. are taken to include the number. Furthermore, “the first”, “the second” are only used to distinguish the technical characteristics and cannot be understood as directing or implying the relative importance or implying the number of technical characteristics specified or the precedence of the specified ones technical features implicitly.

In explaining the present invention, terms such as adjustment, installation and connection should be taken in the broadest sense unless otherwise clearly defined, and those skilled in the art can understand the specific meaning of the above terms in the present invention in combination with the specific reasonably determine the content of the technical solution.

As in 1 1, a refrigerator for the air conditioner in an embodiment of the present invention comprises an evaporator 101, a condenser 102, a first connecting pipe 103, a second connecting pipe 104, a third connecting pipe 105 and an air blowing device 106, the evaporator 101 having an inlet and an outlet includes; and wherein the condenser 102 is provided with a condensation cavity, a gas inlet port, a gas outlet port and a liquid outlet port, and wherein in the condensation cavity a molecular sieve membrane 107 is arranged, which is arranged between the gas inlet port and the gas outlet port, and wherein the molecular sieve membrane 107 is used to to separate the mixed gas; and wherein one end of the first connection pipe 103 is connected to the outlet and the other end is connected to the gas inlet port; and wherein one end of the second connection pipe 104 is connected to the liquid outlet port and the other end is connected to the inlet; and wherein one end of the third connection pipe 105 is connected to the gas outlet port and the other end is connected to the inlet; and wherein the air blowing device 106 is connected to the first connection pipe 103 to introduce the mixed gas into the condensation cavity.

The refrigerant and the decompression gas are poured into the refrigeration unit, and the refrigeration cycle is realized by the cycle conversion of the gaseous and liquid refrigerant.

Specifically, the liquid refrigerant and the decompression gas are mixed in the evaporator 101 . At the position where the liquid refrigerant and the decompression gas start to mix with each other, the evaporator 101 provides a space for evaporation, and the mixing position has no gaseous refrigerant, namely, the partial pressure of the gaseous refrigerant is zero, so that the liquid refrigerant inevitably evaporates to form a gaseous refrigerant. In this process, the evaporator 101 absorbs heat in the air to realize cooling.

The refrigerant gas and the decompression gas are mixed in the evaporator 101 to form a mixed gas. The mixed gas flows along the system and enters the condenser 102 and the air blowing device 106 is used to introduce the mixed gas into the condensation cavity of the condenser 102. A molecular sieve membrane 107 is arranged in the condensation cavity. The definition of molecular sieve membrane is a new type of membrane material that can reach the molecular sieve. The molecular sieve membrane has a uniform pore size corresponding to the molecular size, ion exchange performance, thermal stability against the high temperature, excellent shape-selective catalytic performance, and the molecular sieve membrane is easy to modify, and has a variety of different types and different structures to choose from. The molecular sieve membrane 107 is configured to allow the passage of the decompression gas and thus prevent the passage of refrigerant to achieve the effect of separating the mixed gas.

For example, ammonia is selected as the refrigerant, hydrogen or helium is selected as the decompression gas, and the molecular diameter of hydrogen is 0.289 nanometers, which corresponds to 2.89 Å. The molecular diameter of helium is 0.26 nanometers, which corresponds to 2.6 A. The molecular diameter of ammonia is 0.444 nanometers, which corresponds to 4.44 Å. Therefore, a 3A or 4A molecular sieve membrane 107 can be selected to effectively separate hydrogen and ammonia or helium and ammonia.

The essence of gaseous refrigerant liquefaction is that, after its relative humidity reaches 100%, the gaseous refrigerant inevitably liquefies. Therefore, after the mixed gas is separated, only gaseous refrigerant remains in the center of the condensation cavity, or there are both gaseous refrigerant and liquid refrigerant. When the air-blowing device 106 continuously introduces the mixed gas into the condensing cavity of the condenser 102, the gaseous refrigerant condenses into a liquid refrigerant after its relative humidity reaches 100%.

From a microscopic point of view, evaporation is the process by which the liquid molecules leave the liquid surface. Since the molecules in the liquid are constantly moving at random, the magnitude of their average kinetic energy is related to the temperature of the liquid itself. Because of the random motion and collision of molecules, there are always some molecules with a kinetic energy greater than the average kinetic energy at any point in time. If these molecules with sufficiently large kinetic energy are close to the liquid surface and their kinetic energy is greater than the work required to overcome the gravitational force between molecules in the liquid to fly out, these molecules can leave the liquid surface and fly out and become the vapor of this liquid, which is an evaporation phenomenon. After the molecules that fly out collide with other molecules, they can return to the liquid surface or penetrate inside the liquid. If more molecules fly out than fly back, the liquid will vaporize. The more molecules there are in the space, the more molecules will fly back. When the molecules flying out are equal to those flying back, the liquid is in a saturated state and the pressure at that time is called the saturation pressure Pt of the liquid at that temperature. At this time, if the number of gaseous molecules of the substance in space is artificially increased, the molecules flying back will become more than the molecules flying out, and condensation will occur.

The liquid refrigerant and the decompression gas are mixed by the evaporator 101, so that the surface pressure of the liquid refrigerant decreases, thus the liquid refrigerant generates the vapor and is in a new dynamic equilibrium process to realize the evaporation of the refrigerant. Then, the molecular sieve membrane 107 is used to separate the refrigerant and the decompression gas, when the refrigerant reaches a certain concentration, it condenses into a liquid refrigerant, which then re-enters the evaporator 101 for cooling. The air conditioner refrigeration device changes the traditional refrigeration cycle mode, and the energy consumption required for the condensation process is less, reducing the production cost of the refrigeration device, thus achieving greater economic benefits.

As in 2 As shown, in some embodiments, the terminal of the third connection pipe 105 protrudes into the second connection pipe 104 and protrudes from the inner wall of the second connection pipe 104 . The liquid ammonia enters from the left and the hydrogen enters from the bottom. The terminal provided with the third connection pipe 105 protrudes from the inner wall of the second connection pipe 104 , which can reduce the possibility that the liquid ammonia is poured back into the condenser 102 from the third connection pipe 105 .

According to some embodiments of the present invention, the second connecting tube 104 includes a liquid storage portion 108 comprising a plurality of U-shaped tubes. With the arrangement of the U-shaped pipes, more coolant can be stored to reduce the laying space of the second connection pipe 104 .

According to some embodiments of the present invention, the cooling device further includes a heat dissipation device 109 used for heat dissipation of the condenser 102 . With the arrangement of the heat dissipation device 109, the heat dissipation efficiency of the condenser 102 can be effectively increased to increase the condensation efficiency.

According to some embodiments of the present invention, the heat dissipation device 109 includes a cooling pipe that is wound on the outside of the condenser 102 . The cooling line can use the water source at room temperature, which is convenient for access. It is understood that the heat dissipation device 109 can also use an air-cooled device instead of a cooling pipe or use an air-cooled device in combination with a cooling pipe.

According to some embodiments of the present invention, the inlet of the cooling line is higher than the outlet of the cooling line, which facilitates the flow of water, increases the flow rate, and accelerates heat exchange.

According to some embodiments of the present invention, the gas outlet port is at the top of the condenser 102, the liquid outlet port is at the bottom of the condenser 102, and the gas inlet port is at the central portion of the condenser 102. The mass of the decompression gas is smaller than that of the refrigerant, the decompression gas flows upward, and the gas outlet is located at the top of the condenser 102 to allow the decompression gas to escape. The liquid outlet port is located at the bottom of the condenser 102 to facilitate the outflow of the liquefied refrigerant.

According to some embodiments of the present invention, the condenser 102 includes a cone-shaped guide part, with the gas outlet opening being at the smaller end of the cone-shaped guide part. With the arrangement of the tapered guide part, the decompression gas is guided to flow out of the gas discharge port to reduce the flow loss.

In accordance with some embodiments of the present invention, the air blowing device 106 includes a fan. The fan does not need a large compression ratio like the compressor of a conventional refrigerator, only the mixed gas is to be introduced into the condenser 102, and the condensation is realized by the concentration change of the refrigerant itself. Of course, the air blowing device 106 can also be a compressor, and the capacity can be smaller than that of a conventional compressor.

Please refer 3 , it is understood that the refrigerating apparatus comprises a casing 301, wherein an evaporator 101, a condenser 102 and an air blowing device 106 are respectively arranged in the casing 301, in use, the evaporator 101 is installed indoors and the condenser 102 is installed outdoors, namely, the housing 301 is provided with a first installation space and a second installation space, the first installation space being on the inside of the wall body 302 and the second installation space on the outside of the wall body 302, and the evaporator 101 in the first installation space and the condenser 102 is installed in the second installation space.

Unlike conventional air conditioners, the refrigeration unit is not divided into an indoor unit and an outdoor unit, but is installed in the same case 301, but in operation, a part of the case 301 is located indoors and the other part is located outdoors. In this way, it can be directly installed as a whole, avoiding the need for assembly during installation, and the refrigerant and decompression gas are replenished, improving installation efficiency.

Air conditioner refers to devices that use artificial means to adjust and control the temperature, humidity, flow rate, and other parameters of the ambient air in a building or structure. Although the basic working principle of the present invention has been introduced above, creative work is still required to find a solution suitable for the air conditioner to select. Otherwise, the refrigeration temperature may be too high or too low, which can not meet the needs of the air conditioner.

After continuous screening and verification, the present invention proposes that in some embodiments, the refrigerant includes at least one of R600A, R417A, R410C, and R407C, with the decompression gas including at least one of hydrogen and helium.

Referring to the table below, the relationship between the system pressure required for various refrigerants and the cold end refrigerant temperature is shown. coolant Corresponding saturation pressure at 40°C system pressure Cooling temperature at the cold end R600A 4 bar 8 bar -11°C to 12°C R417A 20 bars 40 bars -10°C to 12°C R410C 20 bars 40 bars -12°C to 12°C R407C 15 bars 30 bar -13°C to 12°C

With R600A as the refrigerant and hydrogen as the decompression gas, the operation of a refrigerator for the air conditioner in an embodiment of the present invention will be explained in detail.

The mixed gas of R600A gas and hydrogen is introduced into the condensation cavity from the gas inlet port of the condenser 102 under the action of the air blowing device 106 . The hydrogen passes through the molecular sieve membrane 107 and flows out from the gas discharge port. The R600A gas is blocked by the molecular sieve membrane 107 and accumulated in the condensation cavity, and the concentration of R600A gas keeps increasing. According to the hs diagram (pressure-enthalpy diagram) of R600A gas, the saturated pressure Pt of R600A at 40°C is 4 bar, so the standby pressure of the chiller is 2 Pt, which is 8 bar, therefore the increases Concentration of R600A gas in the condenser 102 constantly, when the concentration reaches 50%, namely, its partial pressure reaches 1 Pt, the R600A gas starts to condense to form liquid R600A. Liquid R600A flows out from the liquid outlet port. Liquid R600A enters the evaporator 101 along the second connection pipe 104 , the hydrogen enters the evaporator 101 along the third connection pipe 105 , and liquid R600A and the hydrogen are mixed in the evaporator 101 . Since the hydrogen in the evaporator 101 is light, it fills the evaporator 101. Therefore, the partial pressure of the gaseous R600A is close to 0, and the molecules of the liquid R600A enter the hydrogen to form the R600A gas, that is, the liquid R600A vaporizes. After the R600A gas and hydrogen are mixed, the mixed gas enters the condenser 102 along the first connection pipe 103 to realize circulation. In this embodiment, the cooling temperature at the cold end is -11°C to 12°C. It should be noted that the higher the temperature, which corresponds to the saturation pressure of the selected coolant, the greater the required system pressure, the lower the temperature, the greater the heat dissipation requirements of the condenser 102, which increases manufacturing costs . The present invention verifies through many experiments that at a selected temperature of 40°C, the system pressure and heat dissipation requirements can reach an equilibrium to effectively reduce the cost.

In addition, the system pressure of the chiller should only be adjusted to be higher than the saturation pressure at a coolant temperature of 40°C; if the system pressure of the refrigeration equipment is adjusted to be twice the saturation pressure at the refrigerant temperature of 40°C, the efficiency of the refrigeration cycle can be further improved to reduce the time required for refrigeration, while the difficulty and the Manufacturing costs are not excessively increased. The embodiments of the present invention are explained in more detail below in connection with figures, but the present invention is not limited thereto, and various changes can be made within the scope of knowledge of those skilled in the art without departing from the principle of the present invention.

Claims (10)

A refrigerator for an air conditioner, characterized by comprising: a refrigerant in the piping of the refrigerator, the refrigerant being at least one of R600A, R417A, R410C and R407C; a decompression gas disposed in the piping of the refrigerator and comprising at least one of hydrogen and helium; an evaporator comprising an inlet and an outlet; a condenser provided with a condensation cavity, a gas inlet port, a gas outlet port and a liquid outlet port, wherein in the condensation cavity a molecular sieve membrane is arranged, which is arranged between the gas inlet port and the gas outlet port, and wherein the molecular sieve membrane is used to separate the mixed gas separate the refrigerant and the decompression gas; a first connection pipe having one end connected to the outlet and the other end connected to the gas inlet port; a second connection pipe having one end connected to the liquid outlet port and the other end connected to the inlet, a third connection pipe having one end connected to the gas outlet port and the other end connected to the inlet; an air blowing device connected to the first connection pipe to introduce the mixed gas into the condensation cavity; wherein the system pressure of the refrigerator is set to be higher than the saturation pressure at a temperature of the coolant of 40°C; a housing provided with a first installation space and a second installation space, the first installation space being on the inside of the wall body and the second installation space on the outside of the wall body, and the evaporator in the first installation space and the condenser in the second installation space is installed. cooling device after claim 1 , characterized in that the terminal of the third connection pipe protrudes into the second connection pipe and protrudes from the inner wall of the second connection pipe. cooling device after claim 1 , characterized in that the second connection pipe comprises a liquid storage portion comprising a plurality of U-shaped pipes. cooling device after claim 1 , characterized in that the cooling device further comprises a heat dissipation device used for heat dissipation of the condenser. cooling device after claim 4 , characterized in that the heat dissipation device comprises a cooling pipe wound on the outside of the condenser. cooling device after claim 1 , characterized in that the system pressure of the refrigerator is set to be twice the saturation pressure at a coolant temperature of 40°C. cooling device after claim 1 , characterized in that the system pressure of the chiller is set at 8 bar when the refrigerant is R600A. cooling device after claim 1 , characterized in that the system pressure of the refrigeration unit is set at 40 bar when the refrigerant is R417A. cooling device after claim 1 , characterized in that the system pressure of the chiller is set at 40 bar when the refrigerant is R410C. cooling device after claim 1 , characterized in that the system pressure of the chiller is set at 30 bar when the refrigerant is R407C.

Images