CN204665734U - The cooling-water machine of different leaving water temperature is provided simultaneously - Google Patents

Abstract

The purpose of the utility model is to provide a chiller that can provide different outlet water temperatures at the same time. The water chiller includes a compressor, a first heat exchanger, a first throttling device, an economizer, a second throttling device and a second heat exchanger through which the refrigerant passes sequentially. The heat exchanger is connected with a first system load device, wherein a heat exchange water pipe is embedded in the liquid part of the economizer, and the heat exchange water pipe is connected with a second system load device, so as to pass through the heat exchange water pipe. The water in the water pipe exchanges heat with the refrigerant in the liquid part of the economizer to obtain medium-temperature water whose temperature is different from the water temperature of the load device of the first system.

Description

Provide chillers with different outlet water temperatures at the same time

technical field

The utility model relates to a chiller, in particular to a chiller that simultaneously provides different outlet water temperatures.

Background technique

With the development of the global economy, the same customer has diversified load requirements, and it may be necessary to provide multiple load devices with different water temperatures at the same time. This requires that the chiller can be used for multiple purposes to better meet customer needs.

Utility model content

The purpose of the utility model is to provide a chiller that can provide different outlet water temperatures at the same time.

According to an embodiment of the present invention, there is provided a chiller that provides different outlet water temperatures at the same time, including a compressor, a first heat exchanger, a first throttling device, an economizer, a second throttling device and The second heat exchanger is connected with the first system load device at the second heat exchanger or the first heat exchanger, wherein, the liquid part of the economizer is embedded with a heat exchange water pipe, and the heat exchange water pipe A second system load device is connected to facilitate heat exchange between the water in the heat exchange water pipe and the refrigerant in the liquid part of the economizer to obtain water at a temperature different from that of the first system load device.

In a preferred embodiment, a liquid storage container is arranged at the liquid outlet of the economizer, and the liquid storage container is configured such that the liquid refrigerant inside is conveniently transmitted to the second throttling device.

In a preferred embodiment, the compressor is a multi-stage compressor or a plurality of serial compressors.

In a preferred embodiment, the throttling device may be a thermal expansion valve, an electronic expansion valve, a throttling orifice or a float valve.

In a preferred embodiment, the liquid storage container is configured so that the refrigerant entering the second throttling device is in a liquid phase by means of a liquid seal.

In a preferred embodiment, the liquid storage container is a container welded at the bottom of the economizer.

In a preferred embodiment, the water pipe for heat exchange is buried under the liquid level of the economizer to facilitate heat exchange.

In a preferred embodiment, the first system load device is a building air conditioning load device, and the second system load device is a small computer room or other small load devices.

The embodiment of the utility model can adapt to the application occasions with both air conditioning loads (such as office or commercial buildings) and medium temperature loads (such as small computer rooms), and can provide outlet water temperatures suitable for different load requirements at the same time, so that the daily operation efficiency of the unit is higher .

Description of drawings

The above and other features, properties and advantages of the present utility model will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, wherein:

Fig. 1 is a schematic diagram of the system principle of a water chiller according to an embodiment of the present invention;

Fig. 2 is the schematic diagram that adopts compressor serial mode to produce cold water according to the utility model;

Fig. 3 is a schematic diagram of producing cold water according to the utility model by adopting multi-stage compression or intermediate air supply;

Fig. 4 is a schematic diagram of generating hot water by compressors in series according to the utility model;

Fig. 5 is a schematic diagram of generating hot water by means of multi-stage compression or intermediate air supply according to the present invention.

Detailed ways

The utility model will be further described below in conjunction with specific embodiments and accompanying drawings, and more details have been set forth in the following description so as to fully understand the utility model, but the utility model can obviously be in many other ways different from this description To implement, those skilled in the art can make similar promotion and deduction according to the actual application situation without violating the connotation of the utility model, so the content of this specific embodiment should not limit the protection scope of the utility model.

As shown in Figure 1, it is a system for generating cold water. The chiller that provides different outlet water temperatures at the same time includes a compressor 1, a first heat exchanger 2, a first throttling device 3, an economizer 4, and a second throttling device through which the refrigerant passes sequentially. The throttling device 6 and the second heat exchanger 7 are connected to the first system load device 8 that needs cold water at the first temperature through the second heat exchanger 7 through a water exchange pipe. The liquid part of the economizer 4 is embedded with a heat exchange device. Water pipe 51, the heat exchange water pipe 51 is connected to the second system load device 5 that needs cold water of the second temperature, so that the water in the heat exchange water pipe 51 can exchange heat with the refrigerant in the liquid part of the economizer to obtain the second Temperature cold water (or call it medium temperature water, medium temperature is a relative concept relative to the first temperature). The first and second flow devices may be thermal expansion valves, electronic expansion valves, throttling orifice plates or ball float valves.

Refrigerating medium (that is, refrigerant) absorbs the heat of the cooled water in the second heat exchanger 7 and is vaporized into steam, and the compressor 1 continuously extracts the generated steam from the second heat exchanger 7 and compresses it, The compressed high-temperature and high-pressure steam is sent to the first heat exchanger 2, and then condenses to the cooling medium (such as water, air, etc.) to form a high-pressure liquid. After entering the economizer 4, a part of the refrigerant cools another part of the refrigerant by flashing, and this part of the flashing refrigerant becomes gaseous refrigerant G1A, which passes through the communication pipe with the compressor 1 (not shown in the figure) out), re-enter the compressor 1 to continue compression, enter the cycle, and the cooled refrigerant in the other way becomes liquid, accumulates at the bottom of the economizer 4, and exchanges heat with the water exchange pipe 51 embedded in the bottom of the economizer 4, The heat exchange pipe 51 connects the economizer 4 and the second system load device 5 to absorb the heat of the water circulating in the second system load device 5 . The second system load device 5 may include a water tank and a water pump. The water pump continuously circulates the water in the water tank between the water tank and the economizer 5 through the heat exchange pipe 51 to obtain cooling water at a second temperature. The water of the second system load device 5 can be sent into the medium temperature load equipment by water pump, such as a small machine room, and the scale of the small machine room or the small load device is limited to not affecting the operating power of the system load device 8.

Under the action of the heat exchange pipe 51, a part of the refrigerant liquid in the economizer 4 further flashes into a gaseous refrigerant G1B, and re-enters the compressor 1 through the communication pipe (not shown in the figure) with the compressor 1 to continue compressed, the remaining liquid refrigerant enters the second heat exchanger 7 from the bottom of the economizer through the second throttling device 6, and the refrigerant entering the second heat exchanger 7 absorbs the heat of the water circulating in the load device 8 of the first system, Vaporized again, the gaseous refrigerant returns to compressor 1, and the cycle repeats like this. The first system load device 8 may also include a water tank and a water pump, in which water is injected, and the water pump reaches the second heat exchanger 7 by moving the water, and the second heat exchanger 7 acts as an evaporator, so that the water in the water tank is refrigerated The water in the water tank can be pumped into the equipment that needs to be cooled, such as office or commercial air conditioners.

As shown in Figure 2, the compressor 1 is a two-stage compressor that adopts a series connection of compressors, and the chiller provides a working mode of cold water at different temperatures, in which the refrigerant flows through the second heat exchanger (at this time, the evaporator) 7 The interior absorbs the heat of the cooled water provided by the first system load device 8 and is vaporized into steam, and the water in the first system load device 8 is cooled to the required first temperature cooling water. The compressor 1 continuously extracts the generated steam from the second heat exchanger 7 and compresses it, and the compressed high-temperature and high-pressure steam is sent to the first heat exchanger (at this time, the condenser) 2 for subsequent cooling The medium (such as water, air, etc.) releases heat and condenses into a high-pressure liquid, which becomes a gas-liquid two-phase after being decompressed by the first throttling device 3, and then enters the economizer 4. According to the principle shown in Figure 1, in the economizer 4 The bottom is buried with a heat exchange pipe 51, and the heat exchange pipe 51 connects the economizer 4 and the second system load device 5 to absorb the heat of the water circulating in the second system load device 5, so that the second system load device 5 can provide The cold water or medium temperature water at the second temperature also causes a part of the refrigerant liquid in the economizer 4 to further flash into a gaseous refrigerant G1B, and re-enters the compressor through the communication pipe (not shown in the figure) with the compressor 1. Machine 1 continues to compress, and the remaining liquid refrigerant enters the second heat exchanger 7 from the bottom of the economizer through the second throttling device 6, and the refrigerant entering the second heat exchanger 7 absorbs the water circulating in the first system load device 8 The heat is vaporized again, and the gaseous refrigerant returns to compressor 1, and the cycle repeats like this.

In FIG. 2, the compressor 1 may be a three-stage or more-stage compressor.

As shown in Figure 3, the compressor 1 is a compressor that adopts multi-stage compression or intermediate air supply mode, and the chiller also provides the working mode of cold water at different temperatures, in which, the refrigerant is in the second heat exchanger (for the evaporator) 7 absorbs the heat of the cooled water provided by the first system load device 8 and is vaporized into steam, and the water in the first system load device 8 is cooled to the cooling water of the first temperature required. The compressor 1 continuously extracts the generated steam from the second heat exchanger 7 and compresses it, and the compressed high-temperature and high-pressure steam is sent to the first heat exchanger (which is a condenser) 2 and then supplied to the cooling medium ( Such as water, air, etc.) release heat and condense into a high-pressure liquid, which becomes a gas-liquid two-phase after being decompressed by the first throttling device 3 and then enters the economizer 4. According to the aforementioned principle, a water exchange pipe is embedded at the bottom of the economizer 4 , the heat exchange pipe connects the economizer 4 and the second system load device 5 to absorb the heat of the water circulating in the second system load device 5, so that the second system load device 5 can provide cold water or medium-temperature water at a second temperature, At the same time, a part of the refrigerant liquid in the economizer 4 is further flashed into a gaseous refrigerant G1B, and re-enters the compressor 1 through a communication pipe (not shown in the figure) with the compressor 1 to continue compression, and the rest of the liquid refrigerant Enter the second heat exchanger 7 from the bottom of the economizer through the second throttling device 6, and the refrigerant entering the second heat exchanger 7 absorbs the heat of the water circulating in the first system load device 8, and vaporizes again, and the gaseous refrigerant Get back to compressor 1, so cycle over and over again.

The embodiment shown in Figure 4 can be used to provide hot water as well as medium temperature water. In the embodiment shown in FIG. 4 , the refrigerant absorbs the heat of ambient air or other working fluid in the second heat exchanger (the evaporator at this time) 7 and evaporates into steam. The compressor 1 continuously extracts the generated steam from the second heat exchanger 7 and compresses it, and the compressed high-temperature and high-pressure steam is sent to the first heat exchanger (at this time, the condenser) 2 and then sent to the second heat exchanger. The water in the loading device 8 of a system releases heat and condenses into a high-pressure gas-liquid mixture, heating the water in the loading device 8 of the first system to hot water at a third temperature. The high-pressure refrigerant liquid enters the economizer 4 after being decompressed by the first throttling device 3 and becomes a gas-liquid two-phase. Referring to the principle shown in Figure 1, a water exchange pipe 51 is buried at the bottom of the economizer 4, that is, on the liquid side , the heat exchange pipe 51 connects the economizer 4 and the second system load device 5 to absorb heat from the water circulating in the second system load device 5, and the second system load device 5 can provide cold water or medium-temperature water at a second temperature ( The cold or medium temperature here is still relative to the concept of the third temperature), so that a part of the refrigerant liquid in the economizer 4 is further flashed into gaseous refrigerant G1B at the same time, and passes through the communication pipe with the compressor 1 (not shown in the figure). shown), re-enter the compressor 1 to continue compression, and can enter the outlet side of the first-stage compressor of multi-stage compression, and the rest of the liquid refrigerant enters the second heat exchanger 7 from the bottom of the economizer through the second throttling device 6 , the refrigerant entering the second heat exchanger 7 absorbs the heat of the water circulating in the load device 8 of the first system, vaporizes again, and the gaseous refrigerant returns to the compressor 1, so that the cycle goes round and round.

The embodiment shown in FIG. 5 can also provide water of different temperatures, the first system load device 8 provides hot water, and the second system load device 5 provides medium temperature water. In the embodiment shown in FIG. 5 , the refrigerant absorbs the heat of ambient air or other working fluid in the second heat exchanger (the evaporator at this time) 7 and evaporates into steam. The compressor 1 continuously extracts the generated steam from the second heat exchanger 7 and compresses it, and the compressed high-temperature and high-pressure steam is sent to the first heat exchanger (at this time, the condenser) 2 and then sent to the second heat exchanger. The water in the loading device 8 of a system releases heat and condenses into a high-pressure gas-liquid mixture, heating the water in the loading device 8 of the first system to hot water at a third temperature. The high-pressure refrigerant liquid enters the economizer 4 after being decompressed by the first throttling device 3 and becomes a gas-liquid two-phase. Referring to the principle shown in Figure 1, a water exchange pipe 51 is buried at the bottom of the economizer 4, that is, on the liquid side , the heat exchange pipe 51 connects the economizer 4 and the second system load device 5 to absorb heat from the water circulating in the second system load device 5, and the second system load device 5 can provide cold water or medium-temperature water at a second temperature, At the same time, a part of the refrigerant liquid in the economizer 4 is further flashed into a gaseous refrigerant G1B, and re-enters the compressor 1 through a communication pipe (not shown in the figure) with the compressor 1 to continue compression, and the rest of the liquid refrigerant Enter the second heat exchanger 7 from the bottom of the economizer through the second throttling device 6, and the refrigerant entering the second heat exchanger 7 absorbs the heat of the water circulating in the first system load device 8, and vaporizes again, and the gaseous refrigerant Get back to compressor 1, so cycle over and over again.

In a preferred embodiment, a liquid storage container may be arranged at the liquid outlet of the economizer 4 to ensure that the refrigerant entering the throttling device of the evaporator is in a liquid state. The liquid storage container is configured to make the refrigerant entering the second throttling device be in liquid phase through liquid sealing.

The aforementioned compressor may be, but not limited to, a centrifugal compressor or a screw compressor.

It is worth noting that, unless otherwise defined, all technical terms used in the foregoing description have the same meanings as commonly understood by those of ordinary skill in the art. Specific methods and devices are described in this application, but any methods and materials similar or equivalent to those described in the preceding disclosure can be used in the practice of the present technology. While implementations of the techniques have been described in considerable detail and by way of illustration, the illustration is for clarity of understanding only and is not intended to be limiting. Having used various terms in the description to convey an understanding of the technology, it is understood that the meaning of the various terms extends to common linguistic or grammatical variations or forms of the various terms. It should also be understood that when a term refers to a device or equipment, the term or name is provided as a contemporary example, and the technical steps are not limited by the scope of the text. The foregoing terms are to be understood as having been described by present contemporary terminology which may reasonably be understood as derivatives of the contemporary terminology or the designation of a subset of the system encompassed by the contemporary terminology. Furthermore, any one or more features of any embodiment of the technology may be combined with any one or more other features of any embodiment of the technology without departing from the scope of the disclosed technology. Still further, it should be understood that the technology is not limited to the embodiments that have been set forth for illustration, but that the technology is defined only by a fair reading of the claims appended to this patent application, including the rights to each element of the technology. enjoy the same effect throughout the scope. Therefore, although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention, all fall within the scope of protection defined by the claims of the present invention.

Claims (8)

1. one kind provides the cooling-water machine of different leaving water temperature simultaneously, comprise by the compressor of cold-producing medium successively process, First Heat Exchanger, first throttle device, economizer, second throttling arrangement and the second heat exchanger, the first system load device is connected with at the second heat exchanger or First Heat Exchanger place, it is characterized in that, heat exchange water pipe has been imbedded at the liquid position of described economizer, described heat exchange water pipe is connected with second system load device, this second system load device carries out heat exchange by the cold-producing medium at the liquid position of the water in described heat exchange water pipe and described economizer, to obtain the water that temperature is different from the first system load device water temperature.

2. cooling-water machine as claimed in claim 1, it is characterized in that, the liquid outlet of described economizer is configured with liquid storage container, and described liquid storage container is configured to its internal liquid cold-producing medium and is convenient to be sent to described second throttling arrangement.

3. cooling-water machine as claimed in claim 1, it is characterized in that, described compressor is compound compressor or multiple compressors in series.

4. cooling-water machine as claimed in claim 1, it is characterized in that, throttling arrangement can be heating power expansion valve, electric expansion valve, restricting orifice or ball-cock assembly.

5. cooling-water machine as claimed in claim 2, it is characterized in that, described liquid storage container is configured by fluid-tight mode makes the cold-producing medium entering the second throttling arrangement be liquid phase.

6. cooling-water machine as claimed in claim 5, it is characterized in that, this liquid storage container is the container be welded on bottom economizer.

7. cooling-water machine as claimed in claim 1, it is characterized in that, described heat exchange water pipe is embedded in the liquid level bottom of described economizer, is beneficial to heat exchange.

8. cooling-water machine as claimed in claim 1, it is characterized in that, described the first system load device is building air-conditioner load device, and described second system load device is small communication station or other small-sized load devices.