CN212278706U

CN212278706U - Constant temperature dehumidification refrigerating plant

Info

Publication number: CN212278706U
Application number: CN202021944806.3U
Authority: CN
Inventors: 陶冬梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-08
Filing date: 2020-09-08
Publication date: 2021-01-01
Anticipated expiration: 2030-09-08

Abstract

The utility model discloses a constant temperature dehumidification refrigerating plant, including compressor, condenser, switching-over valve, check valve I, expansion valve, check valve II, check valve III, the evaporimeter, the heat exchanger, temperature sensor, off-premises station fan, indoor set fan, the output of compressor is being connected the input of condenser, and its input is being connected the port S of evaporimeter output and switching-over valve, the condenser outside is equipped with the off-premises station fan, and its output is being connected the port D of switching-over valve, the input of check valve I with the port C of switching-over valve links to each other, the output with the input of expansion valve and the three outputs of check valve link to each other. The equipment is simplified, the number of the expansion valves is reduced, and the technical effects of simple control and low cost of constant temperature dehumidification can be realized on the basis of having the conventional refrigeration dehumidification function.

Description

Constant temperature dehumidification refrigerating plant

Technical Field

The utility model relates to a constant temperature dehumidification refrigerating plant field, concretely relates to constant temperature dehumidification refrigerating plant.

Background

The air conditioning system is applied to various occasions, and the air conditioning system used in the occasions such as a machine room, a data center and the like is explained below.

With the rapid development of big data, the air conditioner in the machine room also enters the era of rapid development and response. There are many kinds of electronic devices in a machine room, and in order to improve the stability and reliability of the use of these devices, it is necessary to strictly control the temperature and humidity parameters of the environment within a predetermined range. The early machine room air conditioner uses the travelling comfort air conditioner, often appears because the ambient temperature is improper and causes the machine room equipment to move unstably, appears static, dew formation scheduling problem. The precision air conditioner in the machine room is a special air conditioner designed for the existing machine room, and the temperature and humidity control precision and reliability of the precision air conditioner are much higher than those of the common air conditioner.

The traditional precision air conditioning system mainly depends on a compressor refrigeration system to remove heat load in a machine room and assist electric heating to control temperature. When the humidity is higher than the target humidity, the temperature is lower than the dew point temperature of the air when the air flows through the surface of the evaporator by adjusting the refrigerating system, and the water vapor in the air can be liquefied, so that the humidity in the air is reduced; when the humidity is lower than the target humidity, the humidifier is started to humidify, and the humidity is ensured to be within the target humidity range.

The rotating speed of the traditional precision air-conditioning compressor is adjusted by taking the load calculated according to the temperature or the temperature of the indoor unit as a target value, and when the temperature is higher, the rotating speed of the compressor is higher, the circulating amount of refrigerant in the system is larger, and the refrigerating output is larger; conversely, the compressor speed is lower as the temperature is lower. In this case, the smaller the circulation amount of the refrigerant in the system, the smaller the cooling output. In the whole air conditioning system, because the compressor has the minimum frequency limit, the output of the refrigerating capacity cannot be 0, and is generally about 20 to 30 percent of the maximum refrigerating capacity of the compressor. Therefore, the precision air conditioner has a minimum refrigerating capacity, when the heat load of the precision air conditioner is lower than the minimum refrigerating capacity, the compressor is stopped, a common air conditioning system is damaged by frequent starting and stopping of the compressor, a minimum running time and a stopping time are set, the temperature of a machine room rises in the stopping time, the temperature of the machine room drops when the machine is started, and the temperature fluctuates violently. At the moment, if the machine room needs dehumidification, the dehumidification amount is very limited due to short running time of the compressor, and the humidity of the machine room cannot be controlled at the moment. To this, traditional precision air conditioner producer generally can adopt to increase electrical heating and carry out thermal compensation, can improve compressor operating duration and increase the dehumidification volume after using electrical heating, but the motor heat of the kilowatt of increase is inhomogeneous to air heating needs extra increase air conditioner distribution capacity simultaneously, increases electrical heating and is not the most economic form.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a thermostatic dehumidification cooling device.

According to the technical scheme provided by the embodiment of the application, the constant temperature dehumidification refrigeration device comprises a compressor, a condenser, a reversing valve, a first one-way valve, an expansion valve, a second one-way valve, a third one-way valve, an evaporator, a heat exchanger, a temperature sensor, an outdoor unit fan, an evaporator and an indoor unit fan, wherein the output end of the compressor is connected with the input end of the condenser, the input end of the compressor is connected with the output end of the evaporator, the outdoor unit fan is arranged outside the condenser, the output end of the condenser is connected with a port D of the reversing valve, the input end of the first one-way valve is connected with a port C of the reversing valve, the output end of the first one-way valve is connected with the input end of the expansion valve and the output end of the third one-way valve, the temperature sensor is arranged on the input end of, the output end of the evaporator is connected with the input end of the compressor and the port S of the reversing valve, one end of the heat exchanger is connected with the output end of the one-way valve II, the other end of the heat exchanger is connected with the port E of the reversing valve, the evaporator and the heat exchanger are arranged in the evaporator, and an indoor unit fan is arranged on the outer surface of the evaporator.

The utility model discloses in, the switching-over valve includes port D, port C, port S, port E, and port D and port C switch on during the refrigeration, and port S and port E switch on, and port D and port E switch on during the switching, and port C and port S switch on.

The utility model discloses in, the quantity of expansion valve only is one, and its model is one in electronic expansion valve, the thermal expansion valve.

The utility model discloses in, the evaporimeter with the heat exchanger is one of series connection structure, parallel structure in the wind path side, and the room air passes through the evaporimeter earlier and passes through the heat exchanger again during the series connection, passes through respectively during parallelly connected the evaporimeter with the heat exchanger.

Controlling the rotating speed of the outdoor fan according to the numerical value of the temperature sensor during refrigeration; and changing the gas-liquid ratio of the refrigerant at the output end of the condenser according to the rotating speed.

When the system uses the frequency conversion compressor for refrigeration, the rotating speed of the compressor is controlled according to the temperature of the output air of the heat exchanger; when the system uses the fixed-frequency compressor to refrigerate, the rotating speed of the outdoor fan is controlled according to the temperature of the output air of the heat exchanger; and the rotation speed of the compressor is controlled in an auxiliary mode according to the suction pressure of the compressor, and the frequency operation range of the compressor is limited when the suction pressure is too low or too high.

When in refrigeration, the evaporator and the heat exchanger are in parallel connection at the refrigerant side, and the evaporator and the heat exchanger are in a series connection structure at the refrigerant side during low-load operation or dehumidification operation; the parallel connection and series connection conversion of the heat exchanger and the evaporator is achieved through the reversing of the one-way valve I, the one-way valve II, the one-way valve III and the reversing valve. Compared with the prior two cases which are both in series connection, the resistance of the system is reduced.

Compared with the prior art using two expansion valves, the use of a single expansion valve reduces the number of the expansion valves on one hand, and on the other hand, the expansion valves and the heat exchanger adopt a serial structure, thereby reducing the resistance loss of the heat exchanger, avoiding the impact on the expansion valves in the mode switching process, avoiding the use of the expansion valves from being limited to electronic expansion valves, and using other expansion valve components such as a thermostatic expansion valve and the like.

To sum up, the beneficial effect of this application: the equipment is simplified, the number of the expansion valves is reduced, and the technical effects of simple control and low cost of constant temperature dehumidification can be realized on the basis of having the conventional refrigeration dehumidification function.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic structural diagram of the present invention.

Reference numbers in the figures: the system comprises a compressor-1, a condenser-2, a reversing valve-3, a one-way valve I-4, an expansion valve-5, a one-way valve II-6, a one-way valve III-7, an evaporator-8, a heat exchanger-9, a temperature sensor-10, an outdoor unit fan-11 and an indoor unit fan-13.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, a constant temperature dehumidification refrigeration device comprises a compressor 1, a condenser 2, a reversing valve 3, a first check valve 4, an expansion valve 5, a second check valve 6, a third check valve 7, an evaporator 8, a heat exchanger 9, a temperature sensor 10, an outdoor fan 11, and an indoor fan 13, wherein an output end of the compressor 1 is connected to an input end of the condenser 2, and an input end thereof is connected to an output end of the evaporator 8, the outdoor fan 11 is disposed outside the condenser 2, and an output end thereof is connected to a port D of the reversing valve 3, an input end of the first check valve 4 is connected to a port C of the reversing valve 3, an output end thereof is connected to an input end of the expansion valve 5 and an output end of the third check valve 7, the temperature sensor 10 is disposed on an input end of the expansion valve 5, and an output end thereof is connected to input ends of the evaporator 8 and the second check valve 6, the output end of the evaporator 8 is connected with the input end of the compressor 1 and the port S of the reversing valve 3, one end of the heat exchanger 9 is connected with the output end of the one-way valve II 6, the other end of the heat exchanger is connected with the port E of the reversing valve 3, and an indoor unit fan 13 is arranged on the outer surface of the heat exchanger 9.

The reversing valve 3 comprises a port D, a port C, a port S and a port E, the port D is communicated with the port C during refrigeration, the port S is communicated with the port E, the port D is communicated with the port E during switching, and the port C is communicated with the port S. The number of the expansion valve 5 is only one, and the type of the expansion valve is one of an electronic expansion valve and a thermal expansion valve. The evaporator 8 and the heat exchanger 9 are in one of a series structure and a parallel structure. When the constant-temperature dehumidification refrigerating device is used for refrigerating, the port D of the reversing valve 3 is communicated with the port C, the port S of the reversing valve 3 is communicated with the port E, so that a liquid refrigerant output by the condenser 2 enters through the port D of the reversing valve 3 and flows to the single-phase valve 4 through the port C, is throttled and depressurized through the expansion valve 5 and then is divided into two paths, one path of the refrigerant is conveyed to the evaporator 8, the other path of the refrigerant is conveyed to the heat exchanger 9 through the one-way valve 6, and the refrigerant is evaporated in the evaporator 8 and the heat exchanger 9 and exchanges heat with air of an indoor unit to cool the indoor air.

When the constant-temperature dehumidification refrigeration device operates at constant temperature, the port D of the reversing valve 3 is communicated with the port E, the port S of the reversing valve 3 is communicated with the port C, so that a liquid or gas-liquid two-phase refrigerant output by the condenser 2 enters through the port D of the reversing valve 3 and is conveyed to the heat exchanger 9 through the port E, the refrigerant is output to the input end of the one-way valve 7 from the heat exchanger 9 after being cooled or condensed by the heat exchanger 9, the one-way valve 6 is closed due to the action of pressure difference, the output end of the one-way valve 7 is connected with the input end of the expansion valve 5, the one-way valve 4 is closed due to the action of pressure difference, the refrigerant enters the evaporator 8 after being throttled and depressurized by the expansion valve 5 to be evaporated and exchanges heat with the air.

The foregoing description is only exemplary of the preferred embodiments of the application and is provided for the purpose of illustrating the general principles of the technology and the like. Meanwhile, the scope of the present invention is not limited to the specific combinations of the above-described technical features, and other technical features that are arbitrarily combined with each other or equivalent features may be included without departing from the scope of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The utility model provides a constant temperature dehumidification refrigerating plant, includes compressor (1), condenser (2), switching-over valve (3), check valve (4), expansion valve (5), check valve two (6), check valve three (7), evaporimeter (8), heat exchanger (9), temperature sensor (10), off-premises station fan (11), indoor set fan (13), characterized by: the output end of the compressor (1) is connected with the input end of the condenser (2), the input end of the compressor is connected with the output end of the evaporator (8) and the port S of the reversing valve (3), the outdoor unit fan (11) is arranged outside the condenser (2), the output end of the condenser is connected with the port D of the reversing valve (3), the input end of the one-way valve I (4) is connected with the port C of the reversing valve (3), the output end of the one-way valve I is connected with the input end of the expansion valve (5) and the output end of the one-way valve III (7), the input end of the expansion valve (5) is provided with the temperature sensor (10), the output end of the expansion valve I is connected with the input ends of the evaporator (8) and the one-way valve II (6), the output end of the evaporator (8) is connected with the input end of the compressor (1) and the port S of, one end of the heat exchanger (9) is connected with the output end of the check valve II (6), the other end of the heat exchanger is connected with the port E of the reversing valve (3), and an indoor unit fan (13) is arranged on the outer surface of the heat exchanger (9).

2. A thermostatic dehumidifying and refrigerating device as claimed in claim 1, wherein: the reversing valve (3) comprises a port D, a port C, a port S and a port E, the port D is communicated with the port C in normal, the port S is communicated with the port E, the port D is communicated with the port E in switching, and the port C is communicated with the port S.

3. A thermostatic dehumidifying and refrigerating device as claimed in claim 1, wherein: the number of the expansion valve (5) is only one, and the type of the expansion valve is one of an electronic expansion valve and a thermal expansion valve.

4. A thermostatic dehumidifying and refrigerating device as claimed in claim 1, wherein: the evaporator (8) and the heat exchanger (9) are in one of a series structure and a parallel structure on the wind path side.