CN210601898U

CN210601898U - Cellar constant-temperature constant-humidity air conditioner capable of being started at low temperature

Info

Publication number: CN210601898U
Application number: CN201921458531.XU
Authority: CN
Inventors: 李后明
Original assignee: Shandong Shiteng Environmental Technology Co ltd; Shanghai Shiteng Electric Appliance Co ltd
Current assignee: Shandong Shiteng Environmental Technology Co ltd; Shanghai Shiteng Electric Appliance Co ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-05-22
Anticipated expiration: 2029-09-03

Abstract

The utility model discloses a cellar constant temperature and humidity air conditioner capable of being started at low temperature, which comprises an indoor unit and an outdoor unit and is characterized by also comprising a low temperature starting module, wherein the low temperature starting module comprises a one-way valve, a liquid storage device, an expansion valve and an electronic balance valve; the indoor unit is provided with an indoor unit suction end and an indoor unit discharge end, and the outdoor unit is provided with an outdoor unit suction end and an outdoor unit discharge end; the exhaust end of the external machine, the one-way valve, the liquid storage device, the expansion valve and the intake end of the internal machine are connected through a through pipe in sequence to form an input passage; the exhaust end of the internal machine is connected with the suction end of the external machine through a through pipe to form an output passage; one end of the electronic balance valve is communicated with the input channel, the position of the electronic balance valve is positioned between the discharge end of the external machine and the one-way valve, and the other end of the electronic balance valve is communicated with the output channel. The utility model discloses an increase a low temperature starting module between off-premises station and indoor set, solved wine cellar constant temperature and humidity machine start refrigerated technical difficulty in winter, can realize starting the refrigeration easily and be unlikely to the low pressure and report to the police.

Description

Cellar constant-temperature constant-humidity air conditioner capable of being started at low temperature

Technical Field

The utility model relates to a but cellar for storing things constant temperature and humidity air conditioning system of low temperature start belongs to air conditioner technical field.

Background

Most of cellar constant-temperature and constant-humidity air conditioners in the current market cannot meet the requirements of indoor environment use of a northern area with floor heating, cannot start refrigeration operation and only can heat operation. The indoor temperature of the northern places with floor heating is higher, and the temperature in the wine cellar is required to be below 18 ℃, so that the wine cellar air conditioner can run a refrigeration mode in winter. Can meet the requirement of lower temperature in the wine cellar.

The conventional wine cellar air conditioner in the market cannot be used in a northern area with floor heating, because refrigeration cannot be started in winter, and some wine cellar air conditioners cannot operate due to alarm faults. Under the condition that the outdoor temperature is lower than minus 5 ℃, the refrigerant in the refrigerating system of the wine cellar air conditioner migrates to the outdoor low-temperature condenser, if the compressor is started, low-pressure protection occurs after the compressor is started due to insufficient refrigerating capacity of the refrigerant flowing back to the compressor, and therefore the conventional wine cellar air conditioner cannot be started normally.

Disclosure of Invention

The to-be-solved technical problem of the utility model is how to start the air conditioner under the low temperature condition.

In order to solve the technical problem, the technical scheme of the utility model is to provide a cellar constant temperature and humidity air conditioner capable of being started at low temperature, which comprises an indoor unit and an outdoor unit, and is characterized by further comprising a low temperature starting module, wherein the low temperature starting module comprises a one-way valve, a liquid storage device, an expansion valve and an electronic balance valve; the indoor unit is provided with an indoor unit suction end and an indoor unit discharge end, and the outdoor unit is provided with an outdoor unit suction end and an outdoor unit discharge end; the exhaust end of the external machine, the one-way valve, the liquid storage device, the expansion valve and the intake end of the internal machine are connected through a through pipe in sequence to form an input passage; the exhaust end of the internal machine is connected with the suction end of the external machine through a through pipe to form an output passage; one end of the electronic balance valve is communicated with the input channel, the position of the electronic balance valve is positioned between the discharge end of the external machine and the one-way valve, and the other end of the electronic balance valve is communicated with the output channel.

Preferably, the output passage is provided with a temperature sensing bulb, and the temperature sensing bulb is connected with the expansion valve through an air return pipe.

Preferably, the expansion valve is connected to the output passage through a balance pipe.

The utility model discloses an increase a low temperature starting module between off-premises station and indoor set, solved wine cellar constant temperature and humidity air conditioner start refrigerated technical difficulty in winter, can realize starting the refrigeration easily and be unlikely to the low pressure and report to the police.

Drawings

Fig. 1 is a schematic structural diagram of a cellar constant-temperature constant-humidity air conditioner capable of being started at a low temperature according to this embodiment;

in the figure, a represents a compressor; b represents a condenser; and c denotes an evaporator.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

A conventional cellar machine on the market includes an indoor unit 1 and an outdoor unit 2, the outdoor unit 2 includes a compressor a and a condenser b, and the indoor unit 1 includes an evaporator c. The discharge port of the compressor a in the outdoor unit 2 is connected with the condenser b, the discharge port of the condenser b is connected with the evaporator c of the indoor unit 1, and the discharge port of the evaporator c is connected with the compressor a, so that a complete passage is formed. The indoor unit can not start refrigeration in winter, because when the unit is started, high pressure can not be built, so that the flow of refrigerant is insufficient, the suction flow of the compressor a in the outdoor unit 2 is insufficient, and the pressure in the suction pipe of the compressor a is low to a low pressure alarm value to alarm and can not continue to operate. Based on the defect, the wine cellar air conditioner capable of starting refrigeration in winter is provided; by adding a low-temperature starting module 3 to the system: an expansion valve 33 is adopted for throttling instead of capillary tube throttling, a liquid storage device 32 is added in front of the expansion valve 33, a one-way valve 31 is added in front of the liquid storage device 32, and an electronic balance valve 34 is added. The outlet of the condenser b, namely the outdoor unit discharge end 22, the one-way valve 31, the liquid reservoir 32, the expansion valve 33 and the indoor unit suction end 11 are communicated with each other through liquid pipes in sequence to form an input passage; the exhaust end 12 of the inner machine is communicated with the suction end 21 of the outer machine through a gas pipe to form an output passage; the electronic balance valve 34 has one end communicating with the inlet passage, a position between the outdoor unit discharge end 22 and the check valve 31, and the other end communicating with the outlet passage. When the outdoor temperature is lower than-5 c, and the compressor is stopped, a certain amount of refrigerant is collected in the accumulator 32, and the electronic balance valve 34 is opened, and the high-pressure liquid refrigerant flows into the evaporator c or the return pipe 36 of the indoor unit 1. Therefore, when the compressor a is started next time, the accumulator 32 and the evaporator c have enough refrigerant for the compressor a to suck, and the low-pressure alarm caused by the insufficient suction of the refrigerant of the compressor a due to the insufficient flow of the expansion valve 33 because the high pressure is not established is prevented. The temperature sensing bulb 35 is filled with refrigerant in a gas-liquid equilibrium saturated state, the refrigerant is not communicated with the refrigerant in the system, the temperature sensing bulb 35 is arranged on an air outlet pipe of the evaporator c and is tightly contacted with the pipe to sense the temperature of superheated steam at the outlet of the evaporator c, and then the pressure in a saturated state under temperature transmission is transmitted to the electronic balance valve 34 through an air return pipe 36. One end of the balance pipe 37 is connected to the position of the outlet of the evaporator c close to the temperature sensing bulb 35, and the other end is directly connected with the electronic balance valve 34 through a capillary pipe, and the function of the balance pipe is to transmit the actual pressure at the outlet of the evaporator c to the electronic balance valve 34. The electronic balance valve 34 has two diaphragms that move upward under pressure to reduce the refrigerant flow through the expansion valve 33, thereby achieving balance in the dynamic regime.

The specific flow process of the refrigerant is as follows: the high-temperature and high-pressure refrigerant is discharged from the outdoor unit discharge end 22 of the outdoor unit 2, enters the low-temperature starting module 3, passes through the one-way valve 31 and then enters the liquid accumulator 32, is throttled by the expansion valve 33 to become low-temperature and low-pressure liquid, passes through the indoor unit suction end 11 and enters the indoor unit 1, is evaporated into gas in the evaporator c of the indoor unit 1 and then returns to the low-temperature starting module 3, and then returns to the compressor a.

The specific principle of low-temperature starting is as follows: after the compressor is stopped, the refrigerant in the liquid storage device 32 cannot migrate to the outdoor low-temperature environment, a certain amount of refrigerant is stored, a certain high pressure is maintained, and the throttling liquid supply of the expansion valve 33 is guaranteed. At the same time the electronic balance valve 34 opens and the liquid on the outdoor high pressure side rapidly enters the evaporator c and the suction line of compressor a, providing a certain amount of suction refrigerant for the restart of compressor a.

Therefore, in winter in the north, the compressor can be started for refrigeration easily without low-pressure alarm. The technical requirement of starting refrigeration of the wine cellar constant-temperature constant-humidity air conditioner in winter is met.

Claims

1. A cellar constant-temperature constant-humidity air conditioner capable of being started at a low temperature comprises an indoor unit (1) and an outdoor unit (2), and is characterized by further comprising a low-temperature starting module (3), wherein the low-temperature starting module (3) comprises a one-way valve (31), a liquid storage device (32), an expansion valve (33) and an electronic balance valve (34); the indoor unit (1) is provided with an indoor unit suction end (11) and an indoor unit discharge end (12), and the outdoor unit (2) is provided with an outdoor unit suction end (21) and an outdoor unit discharge end (22); the outdoor unit exhaust end (22), the one-way valve (31), the liquid storage device (32), the expansion valve (33) and the indoor unit suction end (11) are connected through a through pipe in sequence to form an input passage; the exhaust end (12) of the internal machine is connected with the suction end (21) of the external machine through a through pipe to form an output passage; one end of the electronic balance valve (34) is communicated with the input channel, the position is positioned between the discharge end (22) of the outdoor unit and the one-way valve (31), and the other end is communicated with the output channel.

2. The air conditioner as claimed in claim 1, wherein the output path is provided with a bulb (35), and the bulb (35) is connected to the expansion valve (33) through an air return pipe (36).

3. A cellar temperature and humidity constant air conditioner as claimed in claim 1 or 2, wherein the expansion valve (33) is connected to the outlet passage via a balance pipe (37).